diff --git a/dev/demux.html b/dev/demux.html index 7b24edf..c03e1a8 100644 --- a/dev/demux.html +++ b/dev/demux.html @@ -14,8 +14,53 @@ }); const videoTrack = await input.getPrimaryVideoTrack(); + const drain = new Metamuxer.VideoFrameDrain(videoTrack); + const width = await videoTrack.getWidth(); + const height = await videoTrack.getHeight(); + + const canvas = document.createElement('canvas'); + canvas.width = width; + canvas.height = height; + document.body.append(canvas); + + const context = canvas.getContext('2d'); + + // Top-level for await loop inside the event listener + for await (const frame of drain.frames()) { + context.drawImage(frame, 0, 0, width, height); + frame.close(); + } + + /* + const drain = new Metamuxer.EncodedVideoChunkDrain(videoTrack); + + const startChunk = await drain.getFirstChunk(); + for await (const chunk of drain.chunks(startChunk)) { + console.log(chunk.timestamp); + } + */ + + + /* + for (let i = 0; i < 2; i += 0.1) { + console.log(await drain.getChunk(i)); + } + */ + + /* + const drain = new Metamuxer.VideoFrameDrain(videoTrack); + + for await (const frame of drain.frames()) { + // ... + } + + console.log(await videoTrack.getDuration()); + */ + + /* const drain = new Metamuxer.VideoFrameDrain(videoTrack); + const width = await videoTrack.getWidth(); const height = await videoTrack.getHeight(); @@ -31,6 +76,7 @@ context.drawImage(frame, 0, 0, width, height); frame.close(); } + */ /* const videoTrack = await input.getPrimaryVideoTrack(); diff --git a/dist/metamuxer.js b/dist/metamuxer.js index 22fd95a..b9a8069 100644 --- a/dist/metamuxer.js +++ b/dist/metamuxer.js @@ -1137,8 +1137,8 @@ var Metamuxer = (() => { u32(trackData.finalizedChunks.length), // Number of entries trackData.finalizedChunks.map((chunk) => [ - u64(intoTimescale(chunk.startTimestamp, trackData.timescale)), - // Time + u64(intoTimescale(chunk.samples[0].timestamp, trackData.timescale)), + // Time (in presentation time) u64(chunk.moofOffset), // moof offset u32(trackIndex + 1), @@ -2467,14 +2467,14 @@ var Metamuxer = (() => { const movieBox = moov(this.trackDatas, this.creationTime, true); this.boxWriter.writeBox(movieBox); } + const tracksInFragment = this.trackDatas.filter((x) => x.currentChunk); const moofOffset = this.writer.getPos(); - const moofBox = moof(fragmentNumber, this.trackDatas); + const moofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(moofBox); { const mdatBox = mdat(false); let totalTrackSampleSize = 0; - for (const trackData of this.trackDatas) { - assert(trackData.currentChunk); + for (const trackData of tracksInFragment) { for (const sample of trackData.currentChunk.samples) { totalTrackSampleSize += sample.size; } @@ -2487,7 +2487,7 @@ var Metamuxer = (() => { mdatBox.size = mdatSize; this.boxWriter.writeBox(mdatBox); } - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.currentChunk.offset = this.writer.getPos(); trackData.currentChunk.moofOffset = moofOffset; for (const sample of trackData.currentChunk.samples) { @@ -2497,10 +2497,10 @@ var Metamuxer = (() => { } const endPos = this.writer.getPos(); this.writer.seek(this.boxWriter.offsets.get(moofBox)); - const newMoofBox = moof(fragmentNumber, this.trackDatas); + const newMoofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(newMoofBox); this.writer.seek(endPos); - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.finalizedChunks.push(trackData.currentChunk); this.finalizedChunks.push(trackData.currentChunk); trackData.currentChunk = null; @@ -4146,7 +4146,6 @@ ${cue.notes ?? ""}`; }; // src/reader.ts - var PAGE_SIZE = 4096; var Reader = class { constructor(source, maxStorableBytes = Infinity) { this.source = source; @@ -4158,24 +4157,22 @@ ${cue.notes ?? ""}`; nextAge = 0; totalStoredBytes = 0; async loadRange(start, end) { - const alignedStart = Math.floor(start / PAGE_SIZE) * PAGE_SIZE; - let alignedEnd = Math.ceil(end / PAGE_SIZE) * PAGE_SIZE; - alignedEnd = Math.min(alignedEnd, await this.source._getSize()); - const matchingLoadingSegment = this.loadingSegments.find((x) => x.start <= alignedStart && x.end >= alignedEnd); + end = Math.min(end, await this.source._getSize()); + const matchingLoadingSegment = this.loadingSegments.find((x) => x.start <= start && x.end >= end); if (matchingLoadingSegment) { await matchingLoadingSegment.promise; return; } - const encasingSegmentExists = this.loadedSegments.some((x) => x.start <= alignedStart && x.end >= alignedEnd); + const encasingSegmentExists = this.loadedSegments.some((x) => x.start <= start && x.end >= end); if (encasingSegmentExists) { return; } - const bytesPromise = this.source._read(alignedStart, alignedEnd); - const loadingSegment = { start: alignedStart, end: alignedEnd, promise: bytesPromise }; + const bytesPromise = this.source._read(start, end); + const loadingSegment = { start, end, promise: bytesPromise }; this.loadingSegments.push(loadingSegment); const bytes2 = await bytesPromise; removeItem(this.loadingSegments, loadingSegment); - this.insertIntoLoadedSegments(alignedStart, bytes2); + this.insertIntoLoadedSegments(start, bytes2); } insertIntoLoadedSegments(start, bytes2) { const segment = { @@ -4240,6 +4237,21 @@ ${cue.notes ?? ""}`; offset: segment.bytes.byteOffset + start - segment.start }; } + forgetRange(start, end) { + if (end <= start) { + return; + } + const startIndex = binarySearchLessOrEqual(this.loadedSegments, start, (x) => x.start); + if (startIndex === -1) { + return; + } + const segment = this.loadedSegments[startIndex]; + if (segment.start !== start || segment.end !== end) { + return; + } + this.loadedSegments.splice(startIndex, 1); + this.totalStoredBytes -= segment.bytes.byteLength; + } }; // src/isobmff/isobmff-reader.ts @@ -4343,6 +4355,11 @@ ${cue.notes ?? ""}`; metadataPromise = null; movieTimescale = -1; movieDurationInTimescale = -1; + isFragmented = false; + fragmentTrackDefaults = []; + fragments = []; + currentFragment = null; + fragmentLookupMutex = new AsyncMutex(); chunkReader; constructor(input) { super(input); @@ -4383,10 +4400,24 @@ ${cue.notes ?? ""}`; this.isobmffReader.pos + boxInfo.contentSize ); this.readContiguousBoxes(boxInfo.contentSize); - return; + break; } this.isobmffReader.pos = startPos + boxInfo.totalSize; } + if (this.isFragmented) { + await this.isobmffReader.reader.loadRange(sourceSize - 4, sourceSize); + this.isobmffReader.pos = sourceSize - 4; + const lastWord = this.isobmffReader.readU32(); + const potentialMfraPos = sourceSize - lastWord; + if (potentialMfraPos >= 0 && potentialMfraPos < sourceSize) { + await this.isobmffReader.reader.loadRange(potentialMfraPos, sourceSize); + this.isobmffReader.pos = potentialMfraPos; + const boxInfo = this.isobmffReader.readBoxHeader(); + if (boxInfo.name === "mfra") { + this.readContiguousBoxes(boxInfo.contentSize); + } + } + } })(); } getSampleTableForTrack(internalTrack) { @@ -4428,6 +4459,73 @@ ${cue.notes ?? ""}`; sampleTable.presentationTimestamps.sort((a, b) => a.presentationTimestamp - b.presentationTimestamp); return internalTrack.sampleTable; } + async readFragment() { + const startPos = this.isobmffReader.pos; + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + const moofBoxInfo = this.isobmffReader.readBoxHeader(); + assert(moofBoxInfo.name === "moof"); + await this.isobmffReader.reader.loadRange(startPos, startPos + moofBoxInfo.totalSize); + this.isobmffReader.pos = startPos; + this.traverseBox(); + const index = binarySearchExact(this.fragments, startPos, (x) => x.moofOffset); + assert(index !== -1); + const fragment = this.fragments[index]; + assert(fragment.moofOffset === startPos); + this.isobmffReader.reader.forgetRange(startPos, startPos + moofBoxInfo.totalSize); + for (const [trackId, trackData] of fragment.trackData) { + if (trackData.startTimestampIsFinal) { + continue; + } + const internalTrack = this.tracks.find((x) => x.id === trackId); + this.isobmffReader.pos = 0; + let currentFragment = null; + let lastFragment = null; + const index2 = binarySearchLessOrEqual( + internalTrack.fragments, + startPos - 1, + (x) => x.moofOffset + ); + if (index2 !== -1) { + currentFragment = internalTrack.fragments[index2]; + lastFragment = currentFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } + while (this.isobmffReader.pos < startPos) { + if (currentFragment?.nextFragment) { + currentFragment = currentFragment.nextFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } else { + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + const startPos2 = this.isobmffReader.pos; + const boxInfo = this.isobmffReader.readBoxHeader(); + if (boxInfo.name === "moof") { + const index3 = binarySearchExact(this.fragments, startPos2, (x) => x.moofOffset); + if (index3 === -1) { + this.isobmffReader.pos = startPos2; + const fragment2 = await this.readFragment(); + if (currentFragment) currentFragment.nextFragment = fragment2; + currentFragment = fragment2; + } else { + const fragment2 = this.fragments[index3]; + if (currentFragment) currentFragment.nextFragment = fragment2; + currentFragment = fragment2; + } + } + this.isobmffReader.pos = startPos2 + boxInfo.totalSize; + } + if (currentFragment && currentFragment.trackData.has(trackId)) { + lastFragment = currentFragment; + } + } + if (lastFragment) { + const otherTrackData = lastFragment.trackData.get(trackId); + assert(otherTrackData.startTimestampIsFinal); + offsetFragmentTrackDataByTimestamp(trackData, otherTrackData.endTimestamp); + } + trackData.startTimestampIsFinal = true; + } + return fragment; + } readContiguousBoxes(totalSize) { const startIndex = this.isobmffReader.pos; while (this.isobmffReader.pos - startIndex < totalSize) { @@ -4442,6 +4540,7 @@ ${cue.notes ?? ""}`; case "mdia": case "minf": case "dinf": + case "mfra": { this.readContiguousBoxes(boxInfo.contentSize); } @@ -4474,7 +4573,10 @@ ${cue.notes ?? ""}`; durationInTimescale: -1, rotation: 0, sampleTableOffset: -1, - sampleTable: null + sampleTable: null, + fragmentLookupTable: null, + currentFragmentState: null, + fragments: [] }; this.currentTrack = track; this.readContiguousBoxes(boxInfo.contentSize); @@ -4891,6 +4993,293 @@ ${cue.notes ?? ""}`; } ; break; + case "mvex": + { + this.isFragmented = true; + this.readContiguousBoxes(boxInfo.contentSize); + } + ; + break; + case "mehd": + { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const fragmentDuration = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + this.movieDurationInTimescale = fragmentDuration; + } + ; + break; + case "trex": + { + this.isobmffReader.pos += 4; + const trackId = this.isobmffReader.readU32(); + const defaultSampleDescriptionIndex = this.isobmffReader.readU32(); + const defaultSampleDuration = this.isobmffReader.readU32(); + const defaultSampleSize = this.isobmffReader.readU32(); + const defaultSampleFlags = this.isobmffReader.readU32(); + this.fragmentTrackDefaults.push({ + trackId, + defaultSampleDescriptionIndex, + defaultSampleDuration, + defaultSampleSize, + defaultSampleFlags + }); + } + ; + break; + case "tfra": + { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find((x2) => x2.id === trackId); + if (!track) { + break; + } + track.fragmentLookupTable = []; + const word = this.isobmffReader.readU32(); + const lengthSizeOfTrafNum = (word & 48) >> 4; + const lengthSizeOfTrunNum = (word & 12) >> 2; + const lengthSizeOfSampleNum = word & 3; + const x = this.isobmffReader; + const functions = [x.readU8.bind(x), x.readU16.bind(x), x.readU24.bind(x), x.readU32.bind(x)]; + const readTrafNum = functions[lengthSizeOfTrafNum]; + const readTrunNum = functions[lengthSizeOfTrunNum]; + const readSampleNum = functions[lengthSizeOfSampleNum]; + const numberOfEntries = this.isobmffReader.readU32(); + for (let i = 0; i < numberOfEntries; i++) { + const time = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + const moofOffset = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + const trafNumber = readTrafNum(); + const trunNumber = readTrunNum(); + const sampleNumber = readSampleNum(); + track.fragmentLookupTable.push({ + timestamp: time, + moofOffset + }); + } + } + ; + break; + case "moof": + { + this.currentFragment = { + moofOffset: startPos, + moofSize: boxInfo.totalSize, + implicitBaseDataOffset: startPos, + trackData: /* @__PURE__ */ new Map(), + dataStart: Infinity, + dataEnd: 0, + nextFragment: null + }; + this.readContiguousBoxes(boxInfo.contentSize); + const insertionIndex = binarySearchLessOrEqual( + this.fragments, + this.currentFragment.moofOffset, + (x) => x.moofOffset + ); + this.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + for (const [, trackData] of this.currentFragment.trackData) { + const firstSample = trackData.samples[0]; + const lastSample = last(trackData.samples); + this.currentFragment.dataStart = Math.min( + this.currentFragment.dataStart, + firstSample.byteOffset + ); + this.currentFragment.dataEnd = Math.max( + this.currentFragment.dataEnd, + lastSample.byteOffset + lastSample.byteSize + ); + } + this.currentFragment = null; + } + ; + break; + case "traf": + { + assert(this.currentFragment); + this.readContiguousBoxes(boxInfo.contentSize); + if (this.currentTrack) { + const trackData = this.currentFragment.trackData.get(this.currentTrack.id); + if (trackData) { + const insertionIndex = binarySearchLessOrEqual( + this.currentTrack.fragments, + this.currentFragment.moofOffset, + (x) => x.moofOffset + ); + this.currentTrack.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + const { currentFragmentState } = this.currentTrack; + assert(currentFragmentState); + if (currentFragmentState.startTimestamp !== null) { + offsetFragmentTrackDataByTimestamp(trackData, currentFragmentState.startTimestamp); + trackData.startTimestampIsFinal = true; + } + } + this.currentTrack.currentFragmentState = null; + this.currentTrack = null; + } + } + ; + break; + case "tfhd": + { + assert(this.currentFragment); + this.isobmffReader.pos += 1; + const flags = this.isobmffReader.readU24(); + const baseDataOffsetPresent = Boolean(flags & 1); + const sampleDescriptionIndexPresent = Boolean(flags & 2); + const defaultSampleDurationPresent = Boolean(flags & 8); + const defaultSampleSizePresent = Boolean(flags & 16); + const defaultSampleFlagsPresent = Boolean(flags & 32); + const durationIsEmpty = Boolean(flags & 65536); + const defaultBaseIsMoof = Boolean(flags & 131072); + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find((x) => x.id === trackId); + if (!track) { + break; + } + const defaults = this.fragmentTrackDefaults.find((x) => x.trackId === trackId); + this.currentTrack = track; + track.currentFragmentState = { + baseDataOffset: this.currentFragment.implicitBaseDataOffset, + sampleDescriptionIndex: defaults?.defaultSampleDescriptionIndex ?? null, + defaultSampleDuration: defaults?.defaultSampleDuration ?? null, + defaultSampleSize: defaults?.defaultSampleSize ?? null, + defaultSampleFlags: defaults?.defaultSampleFlags ?? null, + startTimestamp: null + }; + if (baseDataOffsetPresent) { + track.currentFragmentState.baseDataOffset = this.isobmffReader.readU64(); + } else if (defaultBaseIsMoof) { + track.currentFragmentState.baseDataOffset = this.currentFragment.moofOffset; + } + if (sampleDescriptionIndexPresent) { + track.currentFragmentState.sampleDescriptionIndex = this.isobmffReader.readU32(); + } + if (defaultSampleDurationPresent) { + track.currentFragmentState.defaultSampleDuration = this.isobmffReader.readU32(); + } + if (defaultSampleSizePresent) { + track.currentFragmentState.defaultSampleSize = this.isobmffReader.readU32(); + } + if (defaultSampleFlagsPresent) { + track.currentFragmentState.defaultSampleFlags = this.isobmffReader.readU32(); + } + if (durationIsEmpty) { + track.currentFragmentState.defaultSampleDuration = 0; + } + } + ; + break; + case "tfdt": + { + const track = this.currentTrack; + if (!track) { + break; + } + assert(track.currentFragmentState); + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const baseMediaDecodeTime = version === 0 ? this.isobmffReader.readU32() : this.isobmffReader.readU64(); + track.currentFragmentState.startTimestamp = baseMediaDecodeTime; + } + ; + break; + case "trun": + { + const track = this.currentTrack; + if (!track) { + break; + } + assert(this.currentFragment); + assert(track.currentFragmentState); + if (this.currentFragment.trackData.has(track.id)) { + throw new Error("Can't have two trun boxes for the same track in one fragment."); + } + const version = this.isobmffReader.readU8(); + const flags = this.isobmffReader.readU24(); + const dataOffsetPresent = Boolean(flags & 1); + const firstSampleFlagsPresent = Boolean(flags & 4); + const sampleDurationPresent = Boolean(flags & 256); + const sampleSizePresent = Boolean(flags & 512); + const sampleFlagsPresent = Boolean(flags & 1024); + const sampleCompositionTimeOffsetsPresent = Boolean(flags & 2048); + const sampleCount = this.isobmffReader.readU32(); + let dataOffset = track.currentFragmentState.baseDataOffset; + if (dataOffsetPresent) { + dataOffset += this.isobmffReader.readI32(); + } + let firstSampleFlags = null; + if (firstSampleFlagsPresent) { + firstSampleFlags = this.isobmffReader.readU32(); + } + let currentOffset = dataOffset; + if (sampleCount === 0) { + this.currentFragment.implicitBaseDataOffset = currentOffset; + break; + } + let currentTimestamp = 0; + const trackData = { + startTimestamp: 0, + endTimestamp: 0, + samples: [], + presentationTimestamps: [], + startTimestampIsFinal: false + }; + this.currentFragment.trackData.set(track.id, trackData); + for (let i = 0; i < sampleCount; i++) { + let sampleDuration; + if (sampleDurationPresent) { + sampleDuration = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleDuration !== null); + sampleDuration = track.currentFragmentState.defaultSampleDuration; + } + let sampleSize; + if (sampleSizePresent) { + sampleSize = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleSize !== null); + sampleSize = track.currentFragmentState.defaultSampleSize; + } + let sampleFlags; + if (sampleFlagsPresent) { + sampleFlags = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleFlags !== null); + sampleFlags = track.currentFragmentState.defaultSampleFlags; + } + if (i === 0 && firstSampleFlags !== null) { + sampleFlags = firstSampleFlags; + } + let sampleCompositionTimeOffset = 0; + if (sampleCompositionTimeOffsetsPresent) { + if (version === 0) { + sampleCompositionTimeOffset = this.isobmffReader.readU32(); + } else { + sampleCompositionTimeOffset = this.isobmffReader.readI32(); + } + } + const isKeyFrame = !(sampleFlags & 65536); + trackData.samples.push({ + presentationTimestamp: currentTimestamp + sampleCompositionTimeOffset, + duration: sampleDuration, + byteOffset: currentOffset, + byteSize: sampleSize, + isKeyFrame + }); + currentOffset += sampleSize; + currentTimestamp += sampleDuration; + } + trackData.presentationTimestamps = trackData.samples.map((x, i) => ({ presentationTimestamp: x.presentationTimestamp, sampleIndex: i })).sort((a, b) => a.presentationTimestamp - b.presentationTimestamp); + const firstSample = trackData.samples[trackData.presentationTimestamps[0].sampleIndex]; + const lastSample = trackData.samples[last(trackData.presentationTimestamps).sampleIndex]; + trackData.startTimestamp = firstSample.presentationTimestamp; + trackData.endTimestamp = lastSample.presentationTimestamp + lastSample.duration; + this.currentFragment.implicitBaseDataOffset = currentOffset; + } + ; + break; } this.isobmffReader.pos = boxEndPos; } @@ -4901,6 +5290,8 @@ ${cue.notes ?? ""}`; } chunkToSampleIndex = /* @__PURE__ */ new WeakMap(); sampleIndexToChunk = /* @__PURE__ */ new Map(); + chunkToFragmentLocation = /* @__PURE__ */ new WeakMap(); + fragmentLocationToChunk = /* @__PURE__ */ new Map(); getCodec() { throw new Error("Not implemented on base class."); } @@ -4935,6 +5326,176 @@ ${cue.notes ?? ""}`; colorSpace: this.internalTrack.info.colorSpace ?? void 0 }; } + async getFirstChunk() { + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => { + const fragment = this.internalTrack.fragments[0]; + return { + fragmentIndex: fragment ? 0 : -1, + sampleIndex: fragment ? 0 : -1, + correctSampleFound: !!fragment + }; + }, + 0, + Infinity + ); + } + return this.fetchChunkForSampleIndex(0); + } + async getChunk(timestamp) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findSampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale + ); + } else { + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + return this.fetchChunkForSampleIndex(sampleIndex); + } + } + async getNextChunk(chunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === void 0) { + throw new Error("Chunk was not created from this track."); + } + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[locationInFragment.sampleIndex]; + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex !== -1); + return this.performFragmentedLookup( + () => { + if (locationInFragment.sampleIndex + 1 < trackData.samples.length) { + return { + fragmentIndex, + sampleIndex: locationInFragment.sampleIndex + 1, + correctSampleFound: true + }; + } else { + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + const trackData2 = currentFragment.trackData.get(this.internalTrack.id); + if (trackData2) { + const fragmentIndex2 = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex2 !== -1); + return { + fragmentIndex: fragmentIndex2, + sampleIndex: 0, + correctSampleFound: true + }; + } + } + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false + }; + } + }, + sample.presentationTimestamp, + Infinity + ); + } + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === void 0) { + throw new Error("Chunk was not created from this track."); + } + return this.fetchChunkForSampleIndex(sampleIndex + 1); + } + async getKeyChunk(timestamp) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findKeySampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale + ); + } + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + const keyFrameSampleIndex = sampleIndex === -1 ? -1 : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + } + async getNextKeyChunk(chunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === void 0) { + throw new Error("Chunk was not created from this track."); + } + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[locationInFragment.sampleIndex]; + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex !== -1); + return this.performFragmentedLookup( + () => { + const nextKeyFrameIndex = trackData.samples.findIndex( + (x, i) => x.isKeyFrame && i > locationInFragment.sampleIndex + ); + if (nextKeyFrameIndex !== -1) { + return { + fragmentIndex, + sampleIndex: nextKeyFrameIndex, + correctSampleFound: true + }; + } else { + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + const trackData2 = currentFragment.trackData.get(this.internalTrack.id); + if (trackData2) { + const fragmentIndex2 = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex2 !== -1); + const keyFrameIndex = trackData2.samples.findIndex((x) => x.isKeyFrame); + if (keyFrameIndex === -1) { + throw new Error("Not supported: Fragment does not contain key sample."); + } + return { + fragmentIndex: fragmentIndex2, + sampleIndex: keyFrameIndex, + correctSampleFound: true + }; + } + } + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false + }; + } + }, + sample.presentationTimestamp, + Infinity + ); + } + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === void 0) { + throw new Error("Chunk was not created from this track."); + } + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); + } async fetchChunkForSampleIndex(sampleIndex) { if (sampleIndex === -1) { return null; @@ -4966,35 +5527,163 @@ ${cue.notes ?? ""}`; this.sampleIndexToChunk.set(sampleIndex, new WeakRef(chunk)); return chunk; } - async getFirstChunk() { - return this.fetchChunkForSampleIndex(0); - } - async getChunk(timestamp) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - return this.fetchChunkForSampleIndex(sampleIndex); - } - async getNextChunk(chunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === void 0) { - throw new Error("Chunk was not created from this track."); + async fetchChunkInFragment(fragment, sampleIndex) { + if (sampleIndex === -1) { + return null; } - return this.fetchChunkForSampleIndex(sampleIndex + 1); + const compositeKey = `${fragment.moofOffset}:${sampleIndex}`; + const existingChunk = this.fragmentLocationToChunk.get(compositeKey)?.deref(); + if (existingChunk) { + return existingChunk; + } + const trackData = fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[sampleIndex]; + assert(sample); + await this.internalTrack.demuxer.chunkReader.reader.loadRange(fragment.dataStart, fragment.dataEnd); + const data = this.internalTrack.demuxer.chunkReader.readRange( + sample.byteOffset, + sample.byteOffset + sample.byteSize + ); + const chunk = new EncodedVideoChunk({ + data, + timestamp: 1e6 * sample.presentationTimestamp / this.internalTrack.timescale, + duration: 1e6 * sample.duration / this.internalTrack.timescale, + type: sample.isKeyFrame ? "key" : "delta" + }); + this.chunkToFragmentLocation.set(chunk, { fragment, sampleIndex }); + this.fragmentLocationToChunk.set(compositeKey, new WeakRef(chunk)); + return chunk; } - async getKeyChunk(timestamp) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - const keyFrameSampleIndex = sampleIndex === -1 ? -1 : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + findSampleInFragmentsForTimestamp(timestampInTimescale) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + (x) => x.trackData.get(this.internalTrack.id).startTimestamp + ); + let sampleIndex = -1; + let correctSampleFound = false; + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + const trackData = fragment.trackData.get(this.internalTrack.id); + const index = binarySearchLessOrEqual( + trackData.presentationTimestamps, + timestampInTimescale, + (x) => x.presentationTimestamp + ); + assert(index !== -1); + sampleIndex = trackData.presentationTimestamps[index].sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + return { fragmentIndex, sampleIndex, correctSampleFound }; } - async getNextKeyChunk(chunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === void 0) { - throw new Error("Chunk was not created from this track."); + findKeySampleInFragmentsForTimestamp(timestampInTimescale) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + (x) => x.trackData.get(this.internalTrack.id).startTimestamp + ); + let sampleIndex = -1; + let correctSampleFound = false; + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + const trackData = fragment.trackData.get(this.internalTrack.id); + const index = trackData.presentationTimestamps.findLastIndex((x) => { + const sample = trackData.samples[x.sampleIndex]; + return sample.isKeyFrame; + }); + if (index === -1) { + throw new Error("Not supported: Fragment does not contain key sample."); + } + const entry = trackData.presentationTimestamps[index]; + sampleIndex = entry.sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + return { fragmentIndex, sampleIndex, correctSampleFound }; + } + /** Looks for a sample in the fragments while trying to load as few fragments as possible to retrieve it. */ + async performFragmentedLookup(getBestMatch, earliestTimestamp, latestTimestamp) { + const { fragmentIndex, sampleIndex, correctSampleFound } = getBestMatch(); + if (correctSampleFound) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + return this.fetchChunkInFragment(fragment, sampleIndex); + } + const demuxer = this.internalTrack.demuxer; + const release = await demuxer.fragmentLookupMutex.acquire(); + try { + const isobmffReader = demuxer.isobmffReader; + const sourceSize = await isobmffReader.reader.source._getSize(); + let prevFragment = null; + let bestFragmentIndex = fragmentIndex; + let bestSampleIndex = sampleIndex; + let lookupEntry = null; + if (this.internalTrack.fragmentLookupTable) { + const index = binarySearchLessOrEqual( + this.internalTrack.fragmentLookupTable, + earliestTimestamp, + (x) => x.timestamp + ); + if (index !== -1) { + lookupEntry = this.internalTrack.fragmentLookupTable[index]; + } + } + if (fragmentIndex === -1) { + isobmffReader.pos = lookupEntry?.moofOffset ?? 0; + } else { + const fragment = this.internalTrack.fragments[fragmentIndex]; + if (!lookupEntry || fragment.moofOffset >= fragment.moofOffset) { + isobmffReader.pos = fragment.moofOffset + fragment.moofSize; + prevFragment = fragment; + } else { + isobmffReader.pos = lookupEntry.moofOffset; + } + } + while (isobmffReader.pos < sourceSize) { + if (prevFragment) { + const trackData = prevFragment.trackData.get(this.internalTrack.id); + if (trackData && trackData.startTimestamp > latestTimestamp) { + break; + } + if (prevFragment.nextFragment) { + isobmffReader.pos = prevFragment.nextFragment.moofOffset + prevFragment.nextFragment.moofSize; + prevFragment = prevFragment.nextFragment; + continue; + } + } + await isobmffReader.reader.loadRange(isobmffReader.pos, isobmffReader.pos + 16); + const startPos = isobmffReader.pos; + const boxInfo = isobmffReader.readBoxHeader(); + if (boxInfo.name === "moof") { + const index = binarySearchExact(demuxer.fragments, startPos, (x) => x.moofOffset); + if (index === -1) { + isobmffReader.pos = startPos; + const fragment = await demuxer.readFragment(); + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + const { fragmentIndex: fragmentIndex2, sampleIndex: sampleIndex2, correctSampleFound: correctSampleFound2 } = getBestMatch(); + if (correctSampleFound2) { + const fragment2 = this.internalTrack.fragments[fragmentIndex2]; + return this.fetchChunkInFragment(fragment2, sampleIndex2); + } + if (fragmentIndex2 !== -1) { + bestFragmentIndex = fragmentIndex2; + bestSampleIndex = sampleIndex2; + } + } else { + const fragment = demuxer.fragments[index]; + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + } + } + isobmffReader.pos = startPos + boxInfo.totalSize; + } + if (bestFragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[bestFragmentIndex]; + return this.fetchChunkInFragment(fragment, bestSampleIndex); + } + return null; + } finally { + release(); } - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); } }; var IsobmffAudioTrackBacking = class extends IsobmffTrackBacking { @@ -5094,6 +5783,16 @@ ${cue.notes ?? ""}`; const index = binarySearchLessOrEqual(sampleTable.keySampleIndices, sampleIndex, (x) => x); return sampleTable.keySampleIndices[index + 1] ?? -1; }; + var offsetFragmentTrackDataByTimestamp = (trackData, timestamp) => { + trackData.startTimestamp += timestamp; + trackData.endTimestamp += timestamp; + for (const sample of trackData.samples) { + sample.presentationTimestamp += timestamp; + } + for (const entry of trackData.presentationTimestamps) { + entry.presentationTimestamp += timestamp; + } + }; // src/matroska/matroska-demuxer.ts var MatroskaDemuxer = class extends Demuxer { @@ -5109,7 +5808,6 @@ ${cue.notes ?? ""}`; if (sourceSize < 8) { return false; } - await input._mainReader.loadRange(4, 8); const isobmffReader = new IsobmffReader(input._mainReader); isobmffReader.pos = 4; const fourCc = isobmffReader.readAscii(4); @@ -5156,6 +5854,7 @@ ${cue.notes ?? 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this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getAudioTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Oe(t),d(t),d(t.decoderConfig);let s={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},timescale:t.decoderConfig.sampleRate,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getSubtitleTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Ve(t),d(t),d(t.config);let s={track:e,type:"subtitle",info:{config:t.config},timescale:1e3,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[],lastCueEndTimestamp:0,cueQueue:[],nextSourceId:0,cueToSourceId:new WeakMap};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),this.validateAndNormalizeTimestamp(e,0,!0),s}async addEncodedVideoChunk(e,t,i){let s=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,i),o=new Uint8Array(t.byteLength);t.copyTo(o);let a=this.validateAndNormalizeTimestamp(n.track,t.timestamp,t.type==="key"),c=this.createSampleForTrack(n,o,a,(t.duration??0)/1e6,t.type);await this.registerSample(n,c)}finally{s()}}async addEncodedAudioChunk(e,t,i){let s=await this.mutex.acquire();try{let n=this.getAudioTrackData(e,i),o=new Uint8Array(t.byteLength);t.copyTo(o);let a=t.type,c=this.validateAndNormalizeTimestamp(n.track,t.timestamp,a==="key"),u=this.createSampleForTrack(n,o,c,(t.duration??0)/1e6,a);await this.registerSample(n,u)}finally{s()}}async addSubtitleCue(e,t,i){let s=await this.mutex.acquire();try{let n=this.getSubtitleTrackData(e,i);this.validateAndNormalizeTimestamp(n.track,1e6*t.timestamp,!0),e.source._codec==="webvtt"&&(n.cueQueue.push(t),await this.processWebVTTCues(n,t.timestamp))}finally{s()}}async processWebVTTCues(e,t){for(;e.cueQueue.length>0;){let i=new Set([]);for(let u of e.cueQueue)d(u.timestamp<=t),d(e.lastCueEndTimestamp<=u.timestamp+u.duration),i.add(Math.max(u.timestamp,e.lastCueEndTimestamp)),i.add(u.timestamp+u.duration);let s=[...i].sort((u,l)=>u-l),n=s[0],o=s[1]??n;if(t=o)break;Z.lastIndex=0;let f=Z.test(l.text),g=l.timestamp+l.duration,x=e.cueToSourceId.get(l);if(x===void 0&&oi.timestamp).sort((i,s)=>i-s);for(let i=0;i{if(e===o)return t.type==="key";let a=o.sampleQueue[0];return 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this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let s of this.trackDatas){if(s.sampleQueue.length===0&&!s.track.source._closed)break e;s.sampleQueue.length>0&&s.sampleQueue[0].timestamp=2**32&&(a.largeSize=!0,u=this.boxWriter.measureBox(a)+c),a.size=u,this.boxWriter.writeBox(a)}for(let a of this.trackDatas){a.currentChunk.offset=this.writer.getPos(),a.currentChunk.moofOffset=i;for(let c of a.currentChunk.samples)this.writer.write(c.data),c.data=null}let n=this.writer.getPos();this.writer.seek(this.boxWriter.offsets.get(s));let o=dt(t,this.trackDatas);this.boxWriter.writeBox(o),this.writer.seek(n);for(let a of this.trackDatas)a.finalizedChunks.push(a.currentChunk),this.finalizedChunks.push(a.currentChunk),a.currentChunk=null;e&&await this.writer.flush()}async onTrackClose(e){let t=await this.mutex.acquire();if(e.type==="subtitle"&&e.source._codec==="webvtt"){let i=this.trackDatas.find(s=>s.track===e);i&&await this.processWebVTTCues(i,1/0)}this.fastStart==="fragmented"&&await this.interleaveSamples(),t()}async finalize(){let e=await this.mutex.acquire();for(let t of this.trackDatas)t.type==="subtitle"&&t.track.source._codec==="webvtt"&&await this.processWebVTTCues(t,1/0);if(this.fastStart==="fragmented"){for(let t of this.trackDatas){for(let i of t.sampleQueue)await this.addSampleToTrack(t,i);this.processTimestamps(t)}await this.finalizeFragment(!1)}else for(let t of this.trackDatas)this.processTimestamps(t),await this.finalizeCurrentChunk(t);if(this.fastStart==="in-memory"){d(this.mdat);let t;for(let s=0;s<2;s++){let n=ce(this.trackDatas,this.creationTime),o=this.boxWriter.measureBox(n);t=this.boxWriter.measureBox(this.mdat);let a=this.writer.getPos()+o+t;for(let c of this.finalizedChunks){c.offset=a;for(let{data:u}of c.samples)d(u),a+=u.byteLength,t+=u.byteLength}if(a<2**32)break;t>=2**32&&(this.mdat.largeSize=!0)}let i=ce(this.trackDatas,this.creationTime);this.boxWriter.writeBox(i),this.mdat.size=t,this.boxWriter.writeBox(this.mdat);for(let s of this.finalizedChunks)for(let n of s.samples)d(n.data),this.writer.write(n.data),n.data=null}else if(this.fastStart==="fragmented"){let t=this.writer.getPos(),i=Pt(this.trackDatas);this.boxWriter.writeBox(i);let s=this.writer.getPos()-t;this.writer.seek(this.writer.getPos()-4),this.boxWriter.writeU32(s)}else{d(this.mdat),d(this.ftypSize!==null);let t=this.boxWriter.offsets.get(this.mdat);d(t!==void 0);let i=this.writer.getPos()-t;this.mdat.size=i,this.mdat.largeSize=i>=2**32,this.boxWriter.patchBox(this.mdat);let s=ce(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(s);let n=t-this.writer.getPos();this.boxWriter.writeBox(Rt(n))}else this.boxWriter.writeBox(s)}e()}};var le=class{value;constructor(e){this.value=e}},re=class{value;constructor(e){this.value=e}},me=class{value;constructor(e){this.value=e}};var lt=r=>r<256?1:r<65536?2:r<1<<24?3:r<2**32?4:r<2**40?5:6,mt=r=>r>=-64&&r<64?1:r>=-8192&&r<8192?2:r>=-(1<<20)&&r<1<<20?3:r>=-(1<<27)&&r<1<<27?4:r>=-(2**34)&&r<2**34?5:6,qt=r=>{if(r<127)return 1;if(r<16383)return 2;if(r<(1<<21)-1)return 3;if(r<(1<<28)-1)return 4;if(r<2**35-1)return 5;if(r<2**42-1)return 6;throw new Error("EBML VINT size not supported "+r)};var ft=2**15,Xt="https://github.com/Vanilagy/webm-muxer",Gt=6,Yt=5,di={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},li={video:1,audio:2,subtitle:17},Me=class extends J{timestampsMustStartAtZero=!1;writer;format;helper=new Uint8Array(8);helperView=new DataView(this.helper.buffer);offsets=new WeakMap;dataOffsets=new WeakMap;trackDatas=[];segment=null;segmentInfo=null;seekHead=null;tracksElement=null;segmentDuration=null;cues=null;currentCluster=null;currentClusterMsTimestamp=null;trackDatasInCurrentCluster=new Set;duration=0;constructor(e,t){super(e),this.writer=e._writer,this.format=t,this.format._options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,t=lt(e)){let i=0;switch(t){case 6:this.helperView.setUint8(i++,e/2**40|0);case 5:this.helperView.setUint8(i++,e/2**32|0);case 4:this.helperView.setUint8(i++,e>>24);case 3:this.helperView.setUint8(i++,e>>16);case 2:this.helperView.setUint8(i++,e>>8);case 1:this.helperView.setUint8(i++,e);break;default:throw new Error("Bad UINT size "+t)}this.writer.write(this.helper.subarray(0,i))}writeSignedInt(e,t=mt(e)){e<0&&(e+=2**(t*8)),this.writeUnsignedInt(e,t)}writeEBMLVarInt(e,t=qt(e)){let i=0;switch(t){case 1:this.helperView.setUint8(i++,128|e);break;case 2:this.helperView.setUint8(i++,64|e>>8),this.helperView.setUint8(i++,e);break;case 3:this.helperView.setUint8(i++,32|e>>16),this.helperView.setUint8(i++,e>>8),this.helperView.setUint8(i++,e);break;case 4:this.helperView.setUint8(i++,16|e>>24),this.helperView.setUint8(i++,e>>16),this.helperView.setUint8(i++,e>>8),this.helperView.setUint8(i++,e);break;case 5:this.helperView.setUint8(i++,8|e/2**32&7),this.helperView.setUint8(i++,e>>24),this.helperView.setUint8(i++,e>>16),this.helperView.setUint8(i++,e>>8),this.helperView.setUint8(i++,e);break;case 6:this.helperView.setUint8(i++,4|e/2**40&3),this.helperView.setUint8(i++,e/2**32|0),this.helperView.setUint8(i++,e>>24),this.helperView.setUint8(i++,e>>16),this.helperView.setUint8(i++,e>>8),this.helperView.setUint8(i++,e);break;default:throw new Error("Bad EBML VINT size "+t)}this.writer.write(this.helper.subarray(0,i))}writeString(e){this.writer.write(new Uint8Array(e.split("").map(t=>t.charCodeAt(0))))}writeEBML(e){if(e!==null){if(e instanceof Uint8Array)this.writer.write(e);else if(Array.isArray(e))for(let t of e)this.writeEBML(t);else if(this.offsets.set(e,this.writer.getPos()),this.writeUnsignedInt(e.id),Array.isArray(e.data)){let t=this.writer.getPos(),i=e.size===-1?1:e.size??4;e.size===-1?this.writeByte(255):this.writer.seek(this.writer.getPos()+i);let s=this.writer.getPos();if(this.dataOffsets.set(e,s),this.writeEBML(e.data),e.size!==-1){let n=this.writer.getPos()-s,o=this.writer.getPos();this.writer.seek(t),this.writeEBMLVarInt(n,i),this.writer.seek(o)}}else if(typeof e.data=="number"){let t=e.size??lt(e.data);this.writeEBMLVarInt(t),this.writeUnsignedInt(e.data,t)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof le)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof re)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof me){let t=e.size??mt(e.data.value);this.writeEBMLVarInt(t),this.writeSignedInt(e.data.value,t)}}}beforeTrackAdd(e){if(this.format instanceof K)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. 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t={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:Xt},{id:22337,data:Xt},this.format._options.streamable?null:e]};this.segmentInfo=t}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let t of this.trackDatas)e.data.push({id:174,data:[{id:215,data:t.track.id},{id:29637,data:t.track.id},{id:131,data:li[t.type]},{id:134,data:di[t.track.source._codec]},t.type==="video"?this.videoSpecificTrackInfo(t):null,t.type==="audio"?this.audioSpecificTrackInfo(t):null,t.type==="subtitle"?this.subtitleSpecificTrackInfo(t):null]})}videoSpecificTrackInfo(e){let t=[e.info.decoderConfig.description?{id:25506,data:F(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],i=e.info.decoderConfig.colorSpace,s={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},xe(i)?{id:21936,data:[{id:21937,data:H[i.matrix]},{id:21946,data:N[i.transfer]},{id:21947,data:W[i.primaries]},{id:21945,data:i.fullRange?2:1}]}:null]};return t.push(s),t}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:F(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new le(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:_.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:Gt,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return d(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Ie(t),d(t),d(t.decoderConfig),d(t.decoderConfig.codedWidth!==void 0),d(t.decoderConfig.codedHeight!==void 0);let s={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getAudioTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Oe(t),d(t),d(t.decoderConfig);let s={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getSubtitleTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Ve(t),d(t),d(t.config);let s={track:e,type:"subtitle",info:{config:t.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}async addEncodedVideoChunk(e,t,i){let s=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,i),o=new Uint8Array(t.byteLength);t.copyTo(o);let a=t.type==="key",c=this.validateAndNormalizeTimestamp(n.track,t.timestamp,a),u=this.createInternalChunk(o,c,(t.duration??0)/1e6,t.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(n,u),n.chunkQueue.push(u),await this.interleaveChunks()}finally{s()}}async 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this.mutex.acquire(),t=this.output._tracks.some(s=>s.type==="video"&&s.source._codec==="avc");this.boxWriter.writeBox(Ut({holdsAvc:t,fragmented:this.fastStart==="fragmented"})),this.ftypSize=this.writer.getPos(),this.fastStart==="in-memory"?this.mdat=Fe(!1):this.fastStart==="fragmented"||(this.mdat=Fe(!0),this.boxWriter.writeBox(this.mdat)),await this.writer.flush(),e()}getVideoTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;De(t),m(t),m(t.decoderConfig),m(t.decoderConfig.codedWidth!==void 0),m(t.decoderConfig.codedHeight!==void 0);let i={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},timescale:e.metadata.frameRate??57600,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getAudioTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Ue(t),m(t),m(t.decoderConfig);let i={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},timescale:t.decoderConfig.sampleRate,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getSubtitleTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Be(t),m(t),m(t.config);let i={track:e,type:"subtitle",info:{config:t.config},timescale:1e3,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[],lastCueEndTimestamp:0,cueQueue:[],nextSourceId:0,cueToSourceId:new WeakMap};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),this.validateAndNormalizeTimestamp(e,0,!0),i}async addEncodedVideoChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getVideoTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=this.validateAndNormalizeTimestamp(a.track,t.timestamp,t.type==="key"),o=this.createSampleForTrack(a,n,c,(t.duration??0)/1e6,t.type);await this.registerSample(a,o)}finally{i()}}async addEncodedAudioChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getAudioTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type,o=this.validateAndNormalizeTimestamp(a.track,t.timestamp,c==="key"),u=this.createSampleForTrack(a,n,o,(t.duration??0)/1e6,c);await this.registerSample(a,u)}finally{i()}}async addSubtitleCue(e,t,s){let i=await this.mutex.acquire();try{let a=this.getSubtitleTrackData(e,s);this.validateAndNormalizeTimestamp(a.track,1e6*t.timestamp,!0),e.source._codec==="webvtt"&&(a.cueQueue.push(t),await this.processWebVTTCues(a,t.timestamp))}finally{i()}}async processWebVTTCues(e,t){for(;e.cueQueue.length>0;){let s=new Set([]);for(let u of e.cueQueue)m(u.timestamp<=t),m(e.lastCueEndTimestamp<=u.timestamp+u.duration),s.add(Math.max(u.timestamp,e.lastCueEndTimestamp)),s.add(u.timestamp+u.duration);let i=[...s].sort((u,d)=>u-d),a=i[0],n=i[1]??a;if(t=n)break;se.lastIndex=0;let l=se.test(d.text),g=d.timestamp+d.duration,h=e.cueToSourceId.get(d);if(h===void 0&&ns.timestamp).sort((s,i)=>s-i);for(let s=0;s{if(e===n)return t.type==="key";let c=n.sampleQueue[0];return c&&c.type==="key"});i>=1&&a&&(s=!0,await this.finalizeFragment())}else s=i>=.5}s&&(e.currentChunk&&await this.finalizeCurrentChunk(e),e.currentChunk={startTimestamp:t.timestamp,samples:[],offset:null,moofOffset:null}),m(e.currentChunk),e.currentChunk.samples.push(t),e.timestampProcessingQueue.push(t)}async finalizeCurrentChunk(e){if(m(this.fastStart!=="fragmented"),!!e.currentChunk){if(e.finalizedChunks.push(e.currentChunk),this.finalizedChunks.push(e.currentChunk),(e.compactlyCodedChunkTable.length===0||_(e.compactlyCodedChunkTable).samplesPerChunk!==e.currentChunk.samples.length)&&e.compactlyCodedChunkTable.push({firstChunk:e.finalizedChunks.length,samplesPerChunk:e.currentChunk.samples.length}),this.fastStart==="in-memory"){e.currentChunk.offset=0;return}e.currentChunk.offset=this.writer.getPos();for(let t of e.currentChunk.samples)m(t.data),this.writer.write(t.data),t.data=null;await this.writer.flush()}}async interleaveSamples(){m(this.fastStart==="fragmented");for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let i of this.trackDatas){if(i.sampleQueue.length===0&&!i.track.source._closed)break e;i.sampleQueue.length>0&&i.sampleQueue[0].timestampo.currentChunk),i=this.writer.getPos(),a=kt(t,s);this.boxWriter.writeBox(a);{let o=Fe(!1),u=0;for(let l of s)for(let g of l.currentChunk.samples)u+=g.size;let d=this.boxWriter.measureBox(o)+u;d>=2**32&&(o.largeSize=!0,d=this.boxWriter.measureBox(o)+u),o.size=d,this.boxWriter.writeBox(o)}for(let o of s){o.currentChunk.offset=this.writer.getPos(),o.currentChunk.moofOffset=i;for(let u of o.currentChunk.samples)this.writer.write(u.data),u.data=null}let n=this.writer.getPos();this.writer.seek(this.boxWriter.offsets.get(a));let c=kt(t,s);this.boxWriter.writeBox(c),this.writer.seek(n);for(let o of s)o.finalizedChunks.push(o.currentChunk),this.finalizedChunks.push(o.currentChunk),o.currentChunk=null;e&&await this.writer.flush()}async onTrackClose(e){let t=await this.mutex.acquire();if(e.type==="subtitle"&&e.source._codec==="webvtt"){let s=this.trackDatas.find(i=>i.track===e);s&&await this.processWebVTTCues(s,1/0)}this.fastStart==="fragmented"&&await this.interleaveSamples(),t()}async finalize(){let e=await this.mutex.acquire();for(let t of this.trackDatas)t.type==="subtitle"&&t.track.source._codec==="webvtt"&&await this.processWebVTTCues(t,1/0);if(this.fastStart==="fragmented"){for(let t of this.trackDatas){for(let s of t.sampleQueue)await this.addSampleToTrack(t,s);this.processTimestamps(t)}await this.finalizeFragment(!1)}else for(let t of this.trackDatas)this.processTimestamps(t),await this.finalizeCurrentChunk(t);if(this.fastStart==="in-memory"){m(this.mdat);let t;for(let i=0;i<2;i++){let a=pe(this.trackDatas,this.creationTime),n=this.boxWriter.measureBox(a);t=this.boxWriter.measureBox(this.mdat);let c=this.writer.getPos()+n+t;for(let o of this.finalizedChunks){o.offset=c;for(let{data:u}of o.samples)m(u),c+=u.byteLength,t+=u.byteLength}if(c<2**32)break;t>=2**32&&(this.mdat.largeSize=!0)}let s=pe(this.trackDatas,this.creationTime);this.boxWriter.writeBox(s),this.mdat.size=t,this.boxWriter.writeBox(this.mdat);for(let i of this.finalizedChunks)for(let a of i.samples)m(a.data),this.writer.write(a.data),a.data=null}else if(this.fastStart==="fragmented"){let t=this.writer.getPos(),s=Wt(this.trackDatas);this.boxWriter.writeBox(s);let i=this.writer.getPos()-t;this.writer.seek(this.writer.getPos()-4),this.boxWriter.writeU32(i)}else{m(this.mdat),m(this.ftypSize!==null);let t=this.boxWriter.offsets.get(this.mdat);m(t!==void 0);let s=this.writer.getPos()-t;this.mdat.size=s,this.mdat.largeSize=s>=2**32,this.boxWriter.patchBox(this.mdat);let i=pe(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(i);let a=t-this.writer.getPos();this.boxWriter.writeBox(Bt(a))}else this.boxWriter.writeBox(i)}e()}};var ge=class{value;constructor(e){this.value=e}},ce=class{value;constructor(e){this.value=e}},ke=class{value;constructor(e){this.value=e}};var Tt=r=>r<256?1:r<65536?2:r<1<<24?3:r<2**32?4:r<2**40?5:6,xt=r=>r>=-64&&r<64?1:r>=-8192&&r<8192?2:r>=-(1<<20)&&r<1<<20?3:r>=-(1<<27)&&r<1<<27?4:r>=-(2**34)&&r<2**34?5:6,tr=r=>{if(r<127)return 1;if(r<16383)return 2;if(r<(1<<21)-1)return 3;if(r<(1<<28)-1)return 4;if(r<2**35-1)return 5;if(r<2**42-1)return 6;throw new Error("EBML VINT size not supported "+r)};var St=2**15,rr="https://github.com/Vanilagy/webm-muxer",ir=6,sr=5,Ti={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},xi={video:1,audio:2,subtitle:17},We=class extends ae{timestampsMustStartAtZero=!1;writer;format;helper=new Uint8Array(8);helperView=new DataView(this.helper.buffer);offsets=new WeakMap;dataOffsets=new WeakMap;trackDatas=[];segment=null;segmentInfo=null;seekHead=null;tracksElement=null;segmentDuration=null;cues=null;currentCluster=null;currentClusterMsTimestamp=null;trackDatasInCurrentCluster=new Set;duration=0;constructor(e,t){super(e),this.writer=e._writer,this.format=t,this.format._options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,t=Tt(e)){let s=0;switch(t){case 6:this.helperView.setUint8(s++,e/2**40|0);case 5:this.helperView.setUint8(s++,e/2**32|0);case 4:this.helperView.setUint8(s++,e>>24);case 3:this.helperView.setUint8(s++,e>>16);case 2:this.helperView.setUint8(s++,e>>8);case 1:this.helperView.setUint8(s++,e);break;default:throw new Error("Bad UINT size "+t)}this.writer.write(this.helper.subarray(0,s))}writeSignedInt(e,t=xt(e)){e<0&&(e+=2**(t*8)),this.writeUnsignedInt(e,t)}writeEBMLVarInt(e,t=tr(e)){let s=0;switch(t){case 1:this.helperView.setUint8(s++,128|e);break;case 2:this.helperView.setUint8(s++,64|e>>8),this.helperView.setUint8(s++,e);break;case 3:this.helperView.setUint8(s++,32|e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 4:this.helperView.setUint8(s++,16|e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 5:this.helperView.setUint8(s++,8|e/2**32&7),this.helperView.setUint8(s++,e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 6:this.helperView.setUint8(s++,4|e/2**40&3),this.helperView.setUint8(s++,e/2**32|0),this.helperView.setUint8(s++,e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;default:throw new Error("Bad EBML VINT size "+t)}this.writer.write(this.helper.subarray(0,s))}writeString(e){this.writer.write(new Uint8Array(e.split("").map(t=>t.charCodeAt(0))))}writeEBML(e){if(e!==null){if(e instanceof Uint8Array)this.writer.write(e);else if(Array.isArray(e))for(let t of e)this.writeEBML(t);else if(this.offsets.set(e,this.writer.getPos()),this.writeUnsignedInt(e.id),Array.isArray(e.data)){let t=this.writer.getPos(),s=e.size===-1?1:e.size??4;e.size===-1?this.writeByte(255):this.writer.seek(this.writer.getPos()+s);let i=this.writer.getPos();if(this.dataOffsets.set(e,i),this.writeEBML(e.data),e.size!==-1){let a=this.writer.getPos()-i,n=this.writer.getPos();this.writer.seek(t),this.writeEBMLVarInt(a,s),this.writer.seek(n)}}else if(typeof e.data=="number"){let t=e.size??Tt(e.data);this.writeEBMLVarInt(t),this.writeUnsignedInt(e.data,t)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof ge)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof ce)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof ke){let t=e.size??xt(e.data.value);this.writeEBMLVarInt(t),this.writeSignedInt(e.data.value,t)}}}beforeTrackAdd(e){if(this.format instanceof J)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. Switching to MKV removes this restriction.")}async start(){let e=await this.mutex.acquire();this.writeEBMLHeader(),this.format._options.streamable||this.createSeekHead(),this.createSegmentInfo(),this.createCues(),await this.writer.flush(),e()}writeEBMLHeader(){let e={id:440786851,data:[{id:17030,data:1},{id:17143,data:1},{id:17138,data:4},{id:17139,data:8},{id:17026,data:this.format instanceof J?"webm":"matroska"},{id:17031,data:2},{id:17029,data:2}]};this.writeEBML(e)}createSeekHead(){let e=new Uint8Array([28,83,187,107]),t=new Uint8Array([21,73,169,102]),s=new Uint8Array([22,84,174,107]),i={id:290298740,data:[{id:19899,data:[{id:21419,data:e},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:t},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:s},{id:21420,size:5,data:0}]}]};this.seekHead=i}createSegmentInfo(){let e={id:17545,data:new ce(0)};this.segmentDuration=e;let t={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:rr},{id:22337,data:rr},this.format._options.streamable?null:e]};this.segmentInfo=t}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let t of this.trackDatas)e.data.push({id:174,data:[{id:215,data:t.track.id},{id:29637,data:t.track.id},{id:131,data:xi[t.type]},{id:134,data:Ti[t.track.source._codec]},t.type==="video"?this.videoSpecificTrackInfo(t):null,t.type==="audio"?this.audioSpecificTrackInfo(t):null,t.type==="subtitle"?this.subtitleSpecificTrackInfo(t):null]})}videoSpecificTrackInfo(e){let t=[e.info.decoderConfig.description?{id:25506,data:Q(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],s=e.info.decoderConfig.colorSpace,i={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},Re(s)?{id:21936,data:[{id:21937,data:q[s.matrix]},{id:21946,data:j[s.transfer]},{id:21947,data:K[s.primaries]},{id:21945,data:s.fullRange?2:1}]}:null]};return t.push(i),t}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:Q(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ge(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:O.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:ir,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return m(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;De(t),m(t),m(t.decoderConfig),m(t.decoderConfig.codedWidth!==void 0),m(t.decoderConfig.codedHeight!==void 0);let i={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getAudioTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Ue(t),m(t),m(t.decoderConfig);let i={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getSubtitleTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Be(t),m(t),m(t.config);let i={track:e,type:"subtitle",info:{config:t.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}async addEncodedVideoChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getVideoTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type==="key",o=this.validateAndNormalizeTimestamp(a.track,t.timestamp,c),u=this.createInternalChunk(n,o,(t.duration??0)/1e6,t.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(a,u),a.chunkQueue.push(u),await this.interleaveChunks()}finally{i()}}async addEncodedAudioChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getAudioTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type,o=c==="key",u=this.validateAndNormalizeTimestamp(a.track,t.timestamp,o),d=this.createInternalChunk(n,u,(t.duration??0)/1e6,c);a.chunkQueue.push(d),await this.interleaveChunks()}finally{i()}}async addSubtitleCue(e,t,s){let i=await this.mutex.acquire();try{let a=this.getSubtitleTrackData(e,s),n=this.validateAndNormalizeTimestamp(a.track,1e6*t.timestamp,!0),c=t.text,o=Math.floor(n*1e3);se.lastIndex=0,c=c.replace(se,g=>{let b=Oe(g.slice(1,-1))-o;return`<${Ee(b)}>`});let u=O.encode(c),d=`${t.settings??""} ${t.identifier??""} -${t.notes??""}`,f=this.createInternalChunk(u,o,t.duration,"key",l.trim()?_.encode(l):null);n.chunkQueue.push(f),await this.interleaveChunks()}finally{s()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let s of this.trackDatas){if(s.chunkQueue.length===0&&!s.track.source._closed)break e;s.chunkQueue.length>0&&s.chunkQueue[0].timestamp=2&&i++;let c={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];Tt(t.data,i+0,i+3,c)}createInternalChunk(e,t,i,s,n=null){return{data:e,type:s,timestamp:t,duration:i,additions:n}}writeBlock(e,t){this.segment||(this.createTracks(),this.createSegment());let i=Math.floor(1e3*t.timestamp),s=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return t.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||s&&i-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(i);let n=i-this.currentClusterMsTimestamp;if(n<0)return;if(n>=ft)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${ft} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${ft} milliseconds.`);let a=new Uint8Array(4),c=new DataView(a.buffer);c.setUint8(0,128|e.track.id),c.setInt16(1,n,!1);let u=Math.floor(1e3*t.duration);if(u===0&&!t.additions){c.setUint8(3,+(t.type==="key")<<7);let l={id:163,data:[a,t.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[a,t.data]},t.type==="delta"?{id:251,data:new me(e.lastWrittenMsTimestamp-i)}:null,t.additions?{id:30113,data:[{id:166,data:[{id:165,data:t.additions},{id:238,data:1}]}]}:null,u>0?{id:155,data:u}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,i+u),e.lastWrittenMsTimestamp=i,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:Yt,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){d(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),t=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,Yt),this.writer.seek(t);let i=this.offsets.get(this.currentCluster)-this.segmentDataOffset;d(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(s=>({id:183,data:[{id:247,data:s.track.id},{id:241,data:i}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let t of this.trackDatas)for(;t.chunkQueue.length>0;)this.writeBlock(t,t.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),d(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let t=this.writer.getPos(),i=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(i,Gt),this.segmentDuration.data=new re(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(t)}e()}};var z=class{},Pe=class extends z{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(e.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=e}_createMuxer(e){return new Re(e,this)}},fe=class extends z{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.streamable!==void 0&&typeof e.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=e}_createMuxer(e){return new Me(e,this)}},K=class extends fe{};var q=class{_connectedTrack=null;_closed=!1;_offsetTimestamps=!1;_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},V=class extends q{_connectedTrack=null;_codec;constructor(e){if(super(),!$.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${$.join(", ")}.`);this._codec=e}},ze=class extends V{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,e,t)}},mi=5,fi=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!$.includes(r.codec))throw new TypeError(`Invalid video codec '${r.codec}'. Must be one of: ${$.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(r.latencyMode!==void 0&&!["quality","realtime"].includes(r.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},he=class{constructor(e,t){this.source=e;this.codecConfig=t;fi(t)}encoder=null;muxer=null;lastMultipleOfKeyFrameInterval=-1;lastWidth=null;lastHeight=null;async digest(e){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(e.codedWidth!==this.lastWidth||e.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${e.codedWidth}x${e.codedHeight}.`)}else this.lastWidth=e.codedWidth,this.lastHeight=e.codedHeight;this.ensureEncoder(e),d(this.encoder);let t=Math.floor(e.timestamp/1e6/mi);this.encoder.encode(e,{keyFrame:t!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=t,this.encoder.encodeQueueSize>=4&&await new Promise(i=>this.encoder.addEventListener("dequeue",i,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new VideoEncoder({output:(t,i)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,t,i),error:t=>console.error("Video encode error:",t)}),this.encoder.configure({codec:Ht(this.codecConfig.codec,e.codedWidth,e.codedHeight,this.codecConfig.bitrate),width:e.codedWidth,height:e.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...jt(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},Be=class extends V{_encoder;constructor(e){super(e.codec),this._encoder=new he(this,e)}digest(e){if(!(e instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},Ue=class extends V{_encoder;_canvas;constructor(e,t){if(!(e instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(t.codec),this._encoder=new he(this,t),this._canvas=e}digest(e,t=0){if(!Number.isFinite(e)||e<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(t)||t<0)throw new TypeError("duration must be a non-negative number.");let i=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*e),duration:Math.round(1e6*t),alpha:"discard"}),s=this._encoder.digest(i);return i.close(),s}_flush(){return this._encoder.flush()}},De=class extends V{_encoder;_abortController=null;_track;_offsetTimestamps=!0;constructor(e,t){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");t={...t,latencyMode:"realtime"},super(t.codec),this._encoder=new he(this,t),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),t=new WritableStream({write:i=>{this._encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},R=class extends q{_connectedTrack=null;_codec;constructor(e){if(super(),!j.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${j.join(", ")}.`);this._codec=e}},Fe=class extends R{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,e,t)}},hi=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!j.includes(r.codec))throw new TypeError(`Invalid audio codec '${r.codec}'. Must be one of: ${j.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},pe=class{constructor(e,t){this.source=e;this.codecConfig=t;hi(t)}encoder=null;muxer=null;lastNumberOfChannels=null;lastSampleRate=null;async digest(e){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(e.numberOfChannels!==this.lastNumberOfChannels||e.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${e.numberOfChannels} channels at ${e.sampleRate} Hz.`)}else this.lastNumberOfChannels=e.numberOfChannels,this.lastSampleRate=e.sampleRate;this.ensureEncoder(e),d(this.encoder),this.encoder.encode(e),this.encoder.encodeQueueSize>=4&&await new Promise(t=>this.encoder.addEventListener("dequeue",t,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new AudioEncoder({output:(t,i)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,t,i),error:t=>console.error("Audio encode error:",t)}),this.encoder.configure({codec:Qt(this.codecConfig.codec,e.numberOfChannels,e.sampleRate),numberOfChannels:e.numberOfChannels,sampleRate:e.sampleRate,bitrate:this.codecConfig.bitrate,...Kt(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},We=class extends R{_encoder;constructor(e){super(e.codec),this._encoder=new pe(this,e)}digest(e){if(!(e instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},Ne=class extends R{_encoder;_accumulatedFrameCount=0;constructor(e){super(e.codec),this._encoder=new pe(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let t=e.numberOfChannels,i=e.sampleRate,s=e.length,n=new Float32Array(t*s);for(let c=0;c{this._encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},X=class extends q{_connectedTrack=null;_codec;constructor(e){if(super(),!de.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${de.join(", ")}.`);this._codec=e}},Le=class extends X{_parser;constructor(e){super(e),this._parser=new Ce({codec:e,output:(t,i)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,t,i),error:t=>console.error("Subtitle parse error:",t)})}digest(e){if(typeof e!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(e),this._connectedTrack.output._muxer.mutex.currentPromise}};var Qe=class{_muxer;_writer;_tracks=[];_started=!1;_finalizing=!1;_mutex=new Y;constructor(e){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(!(e.format instanceof z))throw new TypeError("options.format must be an OutputFormat.");if(!(e.target instanceof P))throw new TypeError("options.target must be a Target.");if(e.target._output)throw new Error("Target is already used for another output.");e.target._output=this,this._writer=e.target._createWriter(),this._muxer=e.format._createMuxer(this)}addVideoTrack(e,t={}){if(!(e instanceof V))throw new TypeError("source must be a VideoSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");if(typeof t.rotation=="number"&&![0,90,180,270].includes(t.rotation))throw new TypeError(`Invalid video rotation: ${t.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(t.rotation)&&(t.rotation.length!==9||t.rotation.some(i=>!Number.isFinite(i))))throw new TypeError(`Invalid video transformation matrix: ${t.rotation.join()}`);if(t.frameRate!==void 0&&(!Number.isInteger(t.frameRate)||t.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${t.frameRate}. Must be a positive integer.`);this._addTrack("video",e,t)}addAudioTrack(e,t={}){if(!(e instanceof R))throw new TypeError("source must be an AudioSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",e,t)}addSubtitleTrack(e,t={}){if(!(e instanceof X))throw new TypeError("source must be a SubtitleSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",e,t)}_addTrack(e,t,i){if(this._started)throw new Error("Cannot add track after output has started.");if(t._connectedTrack)throw new Error("Source is already used for a track.");let s={id:this._tracks.length+1,output:this,type:e,source:t,metadata:i};this._muxer.beforeTrackAdd(s),this._tracks.push(s),t._connectedTrack=s}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let e=await this._mutex.acquire();await this._muxer.start();for(let t of this._tracks)t.source._start();e()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let e=await this._mutex.acquire(),t=this._tracks.map(i=>i.source._flush());await Promise.all(t),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),e()}};var ie=class{_sizePromise=null;_getSize(){return this._sizePromise??=this._retrieveSize()}},$e=class extends ie{constructor(t){super();this.buffer=t}async _read(t,i){return new Uint8Array(this.buffer,t,i-t)}async _retrieveSize(){return this.buffer.byteLength}},je=class extends ie{constructor(t){super();this.blob=t}async _read(t,i){let n=await this.blob.slice(t,i).arrayBuffer();return new Uint8Array(n)}async _retrieveSize(){return this.blob.size}};var se=class{input;constructor(e){this.input=e}};var Ke=class{_backing;constructor(e){this._backing=e}isVideoTrack(){return this instanceof be}isAudioTrack(){return this instanceof ke}getDuration(){return this._backing.getDuration()}},be=class extends Ke{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getWidth(){return this._backing.getWidth()}getHeight(){return this._backing.getHeight()}getRotation(){return this._backing.getRotation()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},ke=class extends Ke{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var qe=4096,ne=class{constructor(e,t=1/0){this.source=e;this.maxStorableBytes=t}loadedSegments=[];loadingSegments=[];sourceSizePromise=null;nextAge=0;totalStoredBytes=0;async loadRange(e,t){let i=Math.floor(e/qe)*qe,s=Math.ceil(t/qe)*qe;s=Math.min(s,await this.source._getSize());let n=this.loadingSegments.find(l=>l.start<=i&&l.end>=s);if(n){await n.promise;return}if(this.loadedSegments.some(l=>l.start<=i&&l.end>=s))return;let a=this.source._read(i,s),c={start:i,end:s,promise:a};this.loadingSegments.push(c);let u=await a;_t(this.loadingSegments,c),this.insertIntoLoadedSegments(i,u)}insertIntoLoadedSegments(e,t){let i={start:e,end:e+t.byteLength,bytes:t,view:new DataView(t.buffer),age:this.nextAge++},s=E(this.loadedSegments,e,n=>n.start);(s===-1||this.loadedSegments[s].start=i.end)break;i.start<=o.start&&o.end<=i.end&&(this.loadedSegments.splice(n,1),n--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let n=null,o=-1;for(let a=0;an.start),s=null;if(i!==-1)for(let n=i;ne)break;if(t<=o.end){s=o;break}}if(!s)throw new Error(`No segment loaded for range [${e}, ${t}).`);return s.age=this.nextAge++,{view:s.view,offset:s.bytes.byteOffset+e-s.start}}};var G=class{constructor(e){this.reader=e}pos=0;readRange(e,t){let{view:i,offset:s}=this.reader.getViewAndOffset(e,t);return new Uint8Array(i.buffer,s,t-e)}readU8(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,e.getUint8(t)}readU16(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,e.getUint16(t,!1)}readU24(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let i=e.getUint16(t,!1),s=e.getUint8(t+2);return i*256+s}readS32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getUint32(t,!1)}readI32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU64(){let e=this.readU32(),t=this.readU32();return e*4294967296+t}readF64(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,e.getFloat64(t,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(e){let{view:t,offset:i}=this.reader.getViewAndOffset(this.pos,this.pos+e);this.pos+=e;let s="";for(let n=0;ne.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let t=await Promise.all(this.tracks.map(s=>s.inputTrack.getCodecMimeType())),i=[...new Set(t)];e+=`; codecs="${i.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.posi.presentationTimestamp-s.presentationTimestamp),e.sampleTable}readContiguousBoxes(e){let t=this.isobmffReader.pos;for(;this.isobmffReader.pos-tl.every((f,g)=>f===c[g]));u===-1?s.rotation=0:s.rotation=90*u}break;case"mdhd":{let s=this.currentTrack;d(s);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3,n===0?(this.isobmffReader.pos+=8,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU32()):n===1&&(this.isobmffReader.pos+=16,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let s=this.currentTrack;d(s),this.isobmffReader.pos+=8;let n=this.isobmffReader.readAscii(4);n==="vide"?s.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:n==="soun"&&(s.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let s=this.currentTrack;d(s),s.sampleTableOffset=e,this.readContiguousBoxes(t.contentSize)}break;case"stsd":{let s=this.currentTrack;if(d(s),s.info===null||s.sampleTable)break;let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let a=0;a0){if(u===1)this.isobmffReader.pos+=4*4;else if(u===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),x=this.isobmffReader.readU32(),C=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}s.info.numberOfChannels=l,s.info.sampleRate=f,this.readContiguousBoxes(e+c.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"hvcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"colr":{let s=this.currentTrack;if(d(s&&s.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),a=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=!!(this.isobmffReader.readU8()&128);s.info.colorSpace={primaries:xt[o],transfer:Ct[a],matrix:wt[c],fullRange:u}}break;case"wave":t.totalSize>8&&this.readContiguousBoxes(t.contentSize);break;case"esds":{let s=this.currentTrack;d(s&&s.info),this.isobmffReader.pos+=4;let n=this.isobmffReader.readU8();d(n===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),a=(o&128)!==0,c=(o&64)!==0,u=(o&32)!==0;if(a&&(this.isobmffReader.pos+=2),c){let C=this.isobmffReader.readU8();this.isobmffReader.pos+=C}u&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();d(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();d(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();d(g===5);let x=this.isobmffReader.readIsomVariableInteger();s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+x)}break;case"stts":{let s=this.currentTrack;if(d(s),!s.sampleTable)break;this.isobmffReader.pos+=4;let n=this.isobmffReader.readU32(),o=0,a=0;for(let c=0;c{let t=E(r.presentationTimestamps,e,i=>i.presentationTimestamp);return t===-1?-1:r.presentationTimestamps[t].sampleIndex},bi=(r,e)=>{let t=E(r.sampleTimingEntries,e,k=>k.startIndex),i=r.sampleTimingEntries[t];if(!i||i.startIndex+i.count<=e)return null;let n=i.startDecodeTimestamp+(e-i.startIndex)*i.delta,o=E(r.sampleCompositionTimeOffsets,e,k=>k.startIndex),a=r.sampleCompositionTimeOffsets[o];a&&(n+=a.offset);let c=r.sampleSizes[Math.min(e,r.sampleSizes.length-1)],u=E(r.sampleToChunk,e,k=>k.startSampleIndex),l=r.sampleToChunk[u];d(l);let f=l.startChunkIndex+Math.floor((e-l.startSampleIndex)/l.samplesPerChunk),g=r.chunkOffsets[f],x=0,C=g;if(r.sampleSizes.length===1)C+=c*(e-l.startSampleIndex),x+=c*l.samplesPerChunk;else{let k=l.startSampleIndex+(f-l.startChunkIndex)*l.samplesPerChunk;for(let S=k;Sk)!==-1:!0}},ki=(r,e)=>{if(!r.keySampleIndices)return e;let t=E(r.keySampleIndices,e,i=>i);return r.keySampleIndices[t]??-1},gi=(r,e)=>{if(!r.keySampleIndices)return e+1;let t=E(r.keySampleIndices,e,i=>i);return r.keySampleIndices[t+1]??-1};var Ye=class extends se{};var Ze=class{},bt=class extends Ze{async _canReadInput(e){if(await e._mainReader.source._getSize()<8)return!1;await e._mainReader.loadRange(4,8);let i=new G(e._mainReader);return i.pos=4,i.readAscii(4)==="ftyp"}_createDemuxer(e){return new Xe(e)}},kt=class extends Ze{async _canReadInput(){return!1}_createDemuxer(e){return new Ye(e)}},ge=new bt,Jt=ge,er=ge,Je=new kt,gt=Je,tr=Je,rr=[ge,gt];var et=class{_source;_formats;_mainReader;_demuxerPromise=null;_format=null;constructor(e){this._formats=e.formats,this._source=e.source,this._mainReader=new ne(e.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{for(let e of this._formats)if(await e._canReadInput(this))return this._format=e,e._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),d(this._format),this._format}async getDuration(){return(await this._getDemuxer()).getDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(t=>t.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(t=>t.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(t=>t.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(t=>t.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var Te=class{constructor(e){this.videoTrack=e}getFirstChunk(){return this.videoTrack._backing.getFirstChunk()}getChunk(e){return this.videoTrack._backing.getChunk(e)}getNextChunk(e){return this.videoTrack._backing.getNextChunk(e)}getKeyChunk(e){return this.videoTrack._backing.getKeyChunk(e)}getNextKeyChunk(e){return this.videoTrack._backing.getNextKeyChunk(e)}async*chunks(e,t=1/0){let i=[],{promise:s,resolve:n}=L(),{promise:o,resolve:a}=L(),c=!1,u=[],l=()=>Math.max(2,u.length);(async()=>{let f=e??await this.getFirstChunk();for(;f&&!c&&!(f.timestamp/1e6>=t);){if(i.length>l()){({promise:o,resolve:a}=L()),await o;continue}i.push(f),n(),{promise:s,resolve:n}=L(),f=await this.getNextChunk(f)}c=!0,n()})();try{for(;;)if(i.length>0){yield i.shift();let f=performance.now();for(u.push(f);u.length>0&&f-u[0]>=1e3;)u.shift();a()}else if(!c)await s;else break}finally{c=!0,a()}}},tt=class{constructor(e){this.videoTrack=e}decoderConfig=null;async createDecoder(e){this.decoderConfig||(this.decoderConfig=await this.videoTrack.getDecoderConfig());let t=new VideoDecoder({output:e,error:i=>console.error(i)});return t.configure(this.decoderConfig),t}async getKeyFrame(e){let t=null,i=await this.createDecoder(n=>t=n),s=await this.videoTrack._backing.getKeyChunk(e);return s?(i.decode(s),await i.flush(),i.close(),t):null}async getFrame(e){let t=null,i=await this.createDecoder(a=>{a.timestamp/1e6<=e?(t?.close(),t=a):a.close()}),s=await this.videoTrack._backing.getKeyChunk(e);if(!s)return null;let n=await this.videoTrack._backing.getChunk(e);d(n),i.decode(s);let o=s;for(;o!==n;){let a=await this.videoTrack._backing.getNextChunk(o);d(a),o=a,i.decode(a),i.decodeQueueSize>=10&&await new Promise(c=>i.addEventListener("dequeue",c,{once:!0}))}return await i.flush(),i.close(),t}async*frames(e=0,t=1/0){let i=[],s=!1,n=null,{promise:o,resolve:a}=L(),c=!1,u=await this.createDecoder(g=>{let x=g.timestamp/1e6;if(x>=t&&(c=!0),c){g.close();return}n&&(x>e?(i.push(n),s=!0):n.close()),x>=e&&(i.push(g),s=!0),n=s?null:g,i.length>0&&(a(),{promise:o,resolve:a}=L())}),l=await this.videoTrack._backing.getKeyChunk(e)??await this.videoTrack._backing.getFirstChunk();if(!l)return;let f=!1;(async()=>{let g=l,x=1/0;if(t<1/0){let S=await this.videoTrack._backing.getChunk(t),B=S?S.type==="key"&&S.timestamp/1e6===t?S:await this.videoTrack._backing.getNextKeyChunk(S):null;B&&(x=B.timestamp/1e6)}let k=new Te(this.videoTrack).chunks(l,x);for(await k.next();g&&!c;){u.decode(g),u.decodeQueueSize>=10&&await new Promise(B=>u.addEventListener("dequeue",B,{once:!0}));let S=await k.next();if(S.done)break;g=S.value}await k.return(),await u.flush(),u.close(),!s&&n&&i.push(n),f=!0,a()})();try{for(;;)if(i.length>0)yield i.shift();else if(!f)await o;else break}finally{c=!0}}};return cr(Ti);})(); +${t.notes??""}`,l=this.createInternalChunk(u,n,t.duration,"key",d.trim()?O.encode(d):null);a.chunkQueue.push(l),await this.interleaveChunks()}finally{i()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let i of this.trackDatas){if(i.chunkQueue.length===0&&!i.track.source._closed)break e;i.chunkQueue.length>0&&i.chunkQueue[0].timestamp=2&&s++;let o={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];_t(t.data,s+0,s+3,o)}createInternalChunk(e,t,s,i,a=null){return{data:e,type:i,timestamp:t,duration:s,additions:a}}writeBlock(e,t){this.segment||(this.createTracks(),this.createSegment());let s=Math.floor(1e3*t.timestamp),i=this.trackDatas.every(d=>{if(d.track.source._closed)return!0;if(e===d)return t.type==="key";let l=d.chunkQueue[0];return l&&l.type==="key"});(!this.currentCluster||i&&s-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(s);let a=s-this.currentClusterMsTimestamp;if(a<0)return;if(a>=St)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${St} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${St} milliseconds.`);let c=new Uint8Array(4),o=new DataView(c.buffer);o.setUint8(0,128|e.track.id),o.setInt16(1,a,!1);let u=Math.floor(1e3*t.duration);if(u===0&&!t.additions){o.setUint8(3,+(t.type==="key")<<7);let d={id:163,data:[c,t.data]};this.writeEBML(d)}else{let d={id:160,data:[{id:161,data:[c,t.data]},t.type==="delta"?{id:251,data:new ke(e.lastWrittenMsTimestamp-s)}:null,t.additions?{id:30113,data:[{id:166,data:[{id:165,data:t.additions},{id:238,data:1}]}]}:null,u>0?{id:155,data:u}:null]};this.writeEBML(d)}this.duration=Math.max(this.duration,s+u),e.lastWrittenMsTimestamp=s,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:sr,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){m(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),t=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,sr),this.writer.seek(t);let s=this.offsets.get(this.currentCluster)-this.segmentDataOffset;m(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(i=>({id:183,data:[{id:247,data:i.track.id},{id:241,data:s}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let t of this.trackDatas)for(;t.chunkQueue.length>0;)this.writeBlock(t,t.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),m(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let t=this.writer.getPos(),s=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(s,ir),this.segmentDuration.data=new ce(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(t)}e()}};var W=class{},He=class extends W{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(e.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=e}_createMuxer(e){return new Ne(e,this)}},Te=class extends W{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.streamable!==void 0&&typeof e.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=e}_createMuxer(e){return new We(e,this)}},J=class extends Te{};var ee=class{_connectedTrack=null;_closed=!1;_offsetTimestamps=!1;_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},z=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!Y.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${Y.join(", ")}.`);this._codec=e}},Le=class extends z{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,e,t)}},Si=5,Ci=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!Y.includes(r.codec))throw new TypeError(`Invalid video codec '${r.codec}'. Must be one of: ${Y.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(r.latencyMode!==void 0&&!["quality","realtime"].includes(r.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},xe=class{constructor(e,t){this.source=e;this.codecConfig=t;Ci(t)}encoder=null;muxer=null;lastMultipleOfKeyFrameInterval=-1;lastWidth=null;lastHeight=null;async digest(e){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(e.codedWidth!==this.lastWidth||e.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${e.codedWidth}x${e.codedHeight}.`)}else this.lastWidth=e.codedWidth,this.lastHeight=e.codedHeight;this.ensureEncoder(e),m(this.encoder);let t=Math.floor(e.timestamp/1e6/Si);this.encoder.encode(e,{keyFrame:t!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=t,this.encoder.encodeQueueSize>=4&&await new Promise(s=>this.encoder.addEventListener("dequeue",s,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new VideoEncoder({output:(t,s)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,t,s),error:t=>console.error("Video encode error:",t)}),this.encoder.configure({codec:Xt(this.codecConfig.codec,e.codedWidth,e.codedHeight,this.codecConfig.bitrate),width:e.codedWidth,height:e.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...Jt(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},$e=class extends z{_encoder;constructor(e){super(e.codec),this._encoder=new xe(this,e)}digest(e){if(!(e instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},Qe=class extends z{_encoder;_canvas;constructor(e,t){if(!(e instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(t.codec),this._encoder=new xe(this,t),this._canvas=e}digest(e,t=0){if(!Number.isFinite(e)||e<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(t)||t<0)throw new TypeError("duration must be a non-negative number.");let s=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*e),duration:Math.round(1e6*t),alpha:"discard"}),i=this._encoder.digest(s);return s.close(),i}_flush(){return this._encoder.flush()}},Ke=class extends z{_encoder;_abortController=null;_track;_offsetTimestamps=!0;constructor(e,t){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");t={...t,latencyMode:"realtime"},super(t.codec),this._encoder=new xe(this,t),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),t=new WritableStream({write:s=>{this._encoder.digest(s),s.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},P=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!Z.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${Z.join(", ")}.`);this._codec=e}},je=class extends P{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,e,t)}},wi=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!Z.includes(r.codec))throw new TypeError(`Invalid audio codec '${r.codec}'. Must be one of: ${Z.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},Se=class{constructor(e,t){this.source=e;this.codecConfig=t;wi(t)}encoder=null;muxer=null;lastNumberOfChannels=null;lastSampleRate=null;async digest(e){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(e.numberOfChannels!==this.lastNumberOfChannels||e.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${e.numberOfChannels} channels at ${e.sampleRate} Hz.`)}else this.lastNumberOfChannels=e.numberOfChannels,this.lastSampleRate=e.sampleRate;this.ensureEncoder(e),m(this.encoder),this.encoder.encode(e),this.encoder.encodeQueueSize>=4&&await new Promise(t=>this.encoder.addEventListener("dequeue",t,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new AudioEncoder({output:(t,s)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,t,s),error:t=>console.error("Audio encode error:",t)}),this.encoder.configure({codec:Yt(this.codecConfig.codec,e.numberOfChannels,e.sampleRate),numberOfChannels:e.numberOfChannels,sampleRate:e.sampleRate,bitrate:this.codecConfig.bitrate,...er(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},qe=class extends P{_encoder;constructor(e){super(e.codec),this._encoder=new Se(this,e)}digest(e){if(!(e instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},Xe=class extends P{_encoder;_accumulatedFrameCount=0;constructor(e){super(e.codec),this._encoder=new Se(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let t=e.numberOfChannels,s=e.sampleRate,i=e.length,a=new Float32Array(t*i);for(let o=0;o{this._encoder.digest(s),s.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},te=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!be.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${be.join(", ")}.`);this._codec=e}},Ye=class extends te{_parser;constructor(e){super(e),this._parser=new Ae({codec:e,output:(t,s)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,t,s),error:t=>console.error("Subtitle parse error:",t)})}digest(e){if(typeof e!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(e),this._connectedTrack.output._muxer.mutex.currentPromise}};var Ze=class{_muxer;_writer;_tracks=[];_started=!1;_finalizing=!1;_mutex=new U;constructor(e){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(!(e.format instanceof W))throw new TypeError("options.format must be an OutputFormat.");if(!(e.target instanceof N))throw new TypeError("options.target must be a Target.");if(e.target._output)throw new Error("Target is already used for another output.");e.target._output=this,this._writer=e.target._createWriter(),this._muxer=e.format._createMuxer(this)}addVideoTrack(e,t={}){if(!(e instanceof z))throw new TypeError("source must be a VideoSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");if(typeof t.rotation=="number"&&![0,90,180,270].includes(t.rotation))throw new TypeError(`Invalid video rotation: ${t.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(t.rotation)&&(t.rotation.length!==9||t.rotation.some(s=>!Number.isFinite(s))))throw new TypeError(`Invalid video transformation matrix: ${t.rotation.join()}`);if(t.frameRate!==void 0&&(!Number.isInteger(t.frameRate)||t.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${t.frameRate}. Must be a positive integer.`);this._addTrack("video",e,t)}addAudioTrack(e,t={}){if(!(e instanceof P))throw new TypeError("source must be an AudioSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",e,t)}addSubtitleTrack(e,t={}){if(!(e instanceof te))throw new TypeError("source must be a SubtitleSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",e,t)}_addTrack(e,t,s){if(this._started)throw new Error("Cannot add track after output has started.");if(t._connectedTrack)throw new Error("Source is already used for a track.");let i={id:this._tracks.length+1,output:this,type:e,source:t,metadata:s};this._muxer.beforeTrackAdd(i),this._tracks.push(i),t._connectedTrack=i}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let e=await this._mutex.acquire();await this._muxer.start();for(let t of this._tracks)t.source._start();e()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let e=await this._mutex.acquire(),t=this._tracks.map(s=>s.source._flush());await Promise.all(t),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),e()}};var ue=class{_sizePromise=null;_getSize(){return this._sizePromise??=this._retrieveSize()}},Je=class extends ue{constructor(t){super();this.buffer=t}async _read(t,s){return new Uint8Array(this.buffer,t,s-t)}async _retrieveSize(){return this.buffer.byteLength}},et=class extends ue{constructor(t){super();this.blob=t}async _read(t,s){let a=await this.blob.slice(t,s).arrayBuffer();return new Uint8Array(a)}async _retrieveSize(){return this.blob.size}};var me=class{input;constructor(e){this.input=e}};var tt=class{_backing;constructor(e){this._backing=e}isVideoTrack(){return this instanceof Ce}isAudioTrack(){return this instanceof we}getDuration(){return this._backing.getDuration()}},Ce=class extends tt{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getWidth(){return this._backing.getWidth()}getHeight(){return this._backing.getHeight()}getRotation(){return this._backing.getRotation()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},we=class extends tt{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var de=class{constructor(e,t=1/0){this.source=e;this.maxStorableBytes=t}loadedSegments=[];loadingSegments=[];sourceSizePromise=null;nextAge=0;totalStoredBytes=0;async loadRange(e,t){t=Math.min(t,await this.source._getSize());let s=this.loadingSegments.find(o=>o.start<=e&&o.end>=t);if(s){await s.promise;return}if(this.loadedSegments.some(o=>o.start<=e&&o.end>=t))return;let a=this.source._read(e,t),n={start:e,end:t,promise:a};this.loadingSegments.push(n);let c=await a;Ft(this.loadingSegments,n),this.insertIntoLoadedSegments(e,c)}insertIntoLoadedSegments(e,t){let s={start:e,end:e+t.byteLength,bytes:t,view:new DataView(t.buffer),age:this.nextAge++},i=I(this.loadedSegments,e,a=>a.start);(i===-1||this.loadedSegments[i].start=s.end)break;s.start<=n.start&&n.end<=s.end&&(this.loadedSegments.splice(a,1),a--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let a=null,n=-1;for(let c=0;ca.start),i=null;if(s!==-1)for(let a=s;ae)break;if(t<=n.end){i=n;break}}if(!i)throw new Error(`No segment loaded for range [${e}, ${t}).`);return i.age=this.nextAge++,{view:i.view,offset:i.bytes.byteOffset+e-i.start}}forgetRange(e,t){if(t<=e)return;let s=I(this.loadedSegments,e,a=>a.start);if(s===-1)return;let i=this.loadedSegments[s];i.start!==e||i.end!==t||(this.loadedSegments.splice(s,1),this.totalStoredBytes-=i.bytes.byteLength)}};var re=class{constructor(e){this.reader=e}pos=0;readRange(e,t){let{view:s,offset:i}=this.reader.getViewAndOffset(e,t);return new Uint8Array(s.buffer,i,t-e)}readU8(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,e.getUint8(t)}readU16(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,e.getUint16(t,!1)}readU24(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let s=e.getUint16(t,!1),i=e.getUint8(t+2);return s*256+i}readS32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getUint32(t,!1)}readI32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU64(){let e=this.readU32(),t=this.readU32();return e*4294967296+t}readF64(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,e.getFloat64(t,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(e){let{view:t,offset:s}=this.reader.getViewAndOffset(this.pos,this.pos+e);this.pos+=e;let i="";for(let a=0;ae.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let t=await Promise.all(this.tracks.map(i=>i.inputTrack.getCodecMimeType())),s=[...new Set(t)];e+=`; codecs="${s.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&ss.presentationTimestamp-i.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let t=this.isobmffReader.readBoxHeader();m(t.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+t.totalSize),this.isobmffReader.pos=e,this.traverseBox();let s=D(this.fragments,e,a=>a.moofOffset);m(s!==-1);let i=this.fragments[s];m(i.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+t.totalSize);for(let[a,n]of i.trackData){if(n.startTimestampIsFinal)continue;let c=this.tracks.find(l=>l.id===a);this.isobmffReader.pos=0;let o=null,u=null,d=I(c.fragments,e-1,l=>l.moofOffset);for(d!==-1&&(o=c.fragments[d],u=o,this.isobmffReader.pos=o.moofOffset+o.moofSize);this.isobmffReader.posb.moofOffset);if(h===-1){this.isobmffReader.pos=l;let b=await this.readFragment();o&&(o.nextFragment=b),o=b}else{let b=this.fragments[h];o&&(o.nextFragment=b),o=b}}this.isobmffReader.pos=l+g.totalSize}o&&o.trackData.has(a)&&(u=o)}if(u){let l=u.trackData.get(a);m(l.startTimestampIsFinal),nr(n,l.endTimestamp)}n.startTimestampIsFinal=!0}return i}readContiguousBoxes(e){let t=this.isobmffReader.pos;for(;this.isobmffReader.pos-td.every((l,g)=>l===o[g]));u===-1?i.rotation=0:i.rotation=90*u}break;case"mdhd":{let i=this.currentTrack;m(i);let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3,a===0?(this.isobmffReader.pos+=8,i.timescale=this.isobmffReader.readU32(),i.durationInTimescale=this.isobmffReader.readU32()):a===1&&(this.isobmffReader.pos+=16,i.timescale=this.isobmffReader.readU32(),i.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let i=this.currentTrack;m(i),this.isobmffReader.pos+=8;let a=this.isobmffReader.readAscii(4);a==="vide"?i.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:a==="soun"&&(i.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let i=this.currentTrack;m(i),i.sampleTableOffset=e,this.readContiguousBoxes(t.contentSize)}break;case"stsd":{let i=this.currentTrack;if(m(i),i.info===null||i.sampleTable)break;let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let n=this.isobmffReader.readU32();for(let c=0;c0){if(u===1)this.isobmffReader.pos+=4*4;else if(u===2){this.isobmffReader.pos+=4,l=this.isobmffReader.readF64(),d=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),h=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),p=this.isobmffReader.readU32()}}i.info.numberOfChannels=d,i.info.sampleRate=l,this.readContiguousBoxes(e+o.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let i=this.currentTrack;m(i&&i.info),i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"hvcC":{let i=this.currentTrack;m(i&&i.info),i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"colr":{let i=this.currentTrack;if(m(i&&i.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let n=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),o=this.isobmffReader.readU16(),u=!!(this.isobmffReader.readU8()&128);i.info.colorSpace={primaries:Rt[n],transfer:At[c],matrix:Ot[o],fullRange:u}}break;case"wave":t.totalSize>8&&this.readContiguousBoxes(t.contentSize);break;case"esds":{let i=this.currentTrack;m(i&&i.info),this.isobmffReader.pos+=4;let a=this.isobmffReader.readU8();m(a===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let n=this.isobmffReader.readU8(),c=(n&128)!==0,o=(n&64)!==0,u=(n&32)!==0;if(c&&(this.isobmffReader.pos+=2),o){let b=this.isobmffReader.readU8();this.isobmffReader.pos+=b}u&&(this.isobmffReader.pos+=2);let d=this.isobmffReader.readU8();m(d===4),this.isobmffReader.readIsomVariableInteger();let l=this.isobmffReader.readU8();m(l===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();m(g===5);let h=this.isobmffReader.readIsomVariableInteger();i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+h)}break;case"stts":{let i=this.currentTrack;if(m(i),!i.sampleTable)break;this.isobmffReader.pos+=4;let a=this.isobmffReader.readU32(),n=0,c=0;for(let o=0;ow.id===a);if(!n)break;n.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),o=(c&48)>>4,u=(c&12)>>2,d=c&3,l=this.isobmffReader,g=[l.readU8.bind(l),l.readU16.bind(l),l.readU24.bind(l),l.readU32.bind(l)],h=g[o],b=g[u],p=g[d],x=this.isobmffReader.readU32();for(let w=0;wa.moofOffset);this.fragments.splice(i+1,0,this.currentFragment);for(let[,a]of this.currentFragment.trackData){let n=a.samples[0],c=_(a.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,n.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(m(this.currentFragment),this.readContiguousBoxes(t.contentSize),this.currentTrack){let i=this.currentFragment.trackData.get(this.currentTrack.id);if(i){let a=I(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(a+1,0,this.currentFragment);let{currentFragmentState:n}=this.currentTrack;m(n),n.startTimestamp!==null&&(nr(i,n.startTimestamp),i.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{m(this.currentFragment),this.isobmffReader.pos+=1;let i=this.isobmffReader.readU24(),a=!!(i&1),n=!!(i&2),c=!!(i&8),o=!!(i&16),u=!!(i&32),d=!!(i&65536),l=!!(i&131072),g=this.isobmffReader.readU32(),h=this.tracks.find(p=>p.id===g);if(!h)break;let b=this.fragmentTrackDefaults.find(p=>p.trackId===g);this.currentTrack=h,h.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:b?.defaultSampleDescriptionIndex??null,defaultSampleDuration:b?.defaultSampleDuration??null,defaultSampleSize:b?.defaultSampleSize??null,defaultSampleFlags:b?.defaultSampleFlags??null,startTimestamp:null},a?h.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():l&&(h.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),n&&(h.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(h.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),o&&(h.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),u&&(h.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),d&&(h.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let i=this.currentTrack;if(!i)break;m(i.currentFragmentState);let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let n=a===0?this.isobmffReader.readU32():this.isobmffReader.readU64();i.currentFragmentState.startTimestamp=n}break;case"trun":{let i=this.currentTrack;if(!i)break;if(m(this.currentFragment),m(i.currentFragmentState),this.currentFragment.trackData.has(i.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let a=this.isobmffReader.readU8(),n=this.isobmffReader.readU24(),c=!!(n&1),o=!!(n&4),u=!!(n&256),d=!!(n&512),l=!!(n&1024),g=!!(n&2048),h=this.isobmffReader.readU32(),b=i.currentFragmentState.baseDataOffset;c&&(b+=this.isobmffReader.readI32());let p=null;o&&(p=this.isobmffReader.readU32());let x=b;if(h===0){this.currentFragment.implicitBaseDataOffset=x;break}let w=0,y={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(i.id,y);for(let V=0;V({presentationTimestamp:V.presentationTimestamp,sampleIndex:A})).sort((V,A)=>V.presentationTimestamp-A.presentationTimestamp);let H=y.samples[y.presentationTimestamps[0].sampleIndex],ie=y.samples[_(y.presentationTimestamps).sampleIndex];y.startTimestamp=H.presentationTimestamp,y.endTimestamp=ie.presentationTimestamp+ie.duration,this.currentFragment.implicitBaseDataOffset=x}break}this.isobmffReader.pos=s}},it=class{constructor(e){this.internalTrack=e}chunkToSampleIndex=new WeakMap;sampleIndexToChunk=new Map;chunkToFragmentLocation=new WeakMap;fragmentLocationToChunk=new Map;getCodec(){throw new Error("Not implemented on base class.")}async getDuration(){return this.internalTrack.durationInTimescale/this.internalTrack.timescale}},Ct=class extends it{internalTrack;constructor(e){super(e),this.internalTrack=e}async getCodec(){return this.internalTrack.info.codec}async getWidth(){return this.internalTrack.info.width}async getHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:Gt(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}async getFirstChunk(){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0):this.fetchChunkForSampleIndex(0)}async getChunk(e){let t=e*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(t),t,t);{let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=ar(s,t);return this.fetchChunkForSampleIndex(i)}}async getNextChunk(e){if(this.internalTrack.demuxer.isFragmented){let s=this.chunkToFragmentLocation.get(e);if(s===void 0)throw new Error("Chunk was not created from this track.");let i=s.fragment.trackData.get(this.internalTrack.id),a=i.samples[s.sampleIndex],n=D(this.internalTrack.fragments,s.fragment.moofOffset,c=>c.moofOffset);return m(n!==-1),this.performFragmentedLookup(()=>{if(s.sampleIndex+1d.moofOffset);return m(u!==-1),{fragmentIndex:u,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:n,sampleIndex:-1,correctSampleFound:!1}}},a.presentationTimestamp,1/0)}let t=this.chunkToSampleIndex.get(e);if(t===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(t+1)}async getKeyChunk(e){let t=e*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(t),t,t);let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=ar(s,t),a=i===-1?-1:Ii(s,i);return this.fetchChunkForSampleIndex(a)}async getNextKeyChunk(e){if(this.internalTrack.demuxer.isFragmented){let a=this.chunkToFragmentLocation.get(e);if(a===void 0)throw new Error("Chunk was not created from this track.");let n=a.fragment.trackData.get(this.internalTrack.id),c=n.samples[a.sampleIndex],o=D(this.internalTrack.fragments,a.fragment.moofOffset,u=>u.moofOffset);return m(o!==-1),this.performFragmentedLookup(()=>{let u=n.samples.findIndex((d,l)=>d.isKeyFrame&&l>a.sampleIndex);if(u!==-1)return{fragmentIndex:o,sampleIndex:u,correctSampleFound:!0};{let d=a.fragment;for(;d.nextFragment;){d=d.nextFragment;let l=d.trackData.get(this.internalTrack.id);if(l){let g=D(this.internalTrack.fragments,d.moofOffset,b=>b.moofOffset);m(g!==-1);let h=l.samples.findIndex(b=>b.isKeyFrame);if(h===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:h,correctSampleFound:!0}}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0)}let t=this.chunkToSampleIndex.get(e);if(t===void 0)throw new Error("Chunk was not created from this track.");let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=_i(s,t);return this.fetchChunkForSampleIndex(i)}async fetchChunkForSampleIndex(e){if(e===-1)return null;let t=this.sampleIndexToChunk.get(e)?.deref();if(t)return t;let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=vi(s,e);if(!i)return null;await this.internalTrack.demuxer.chunkReader.reader.loadRange(i.chunkOffset,i.chunkOffset+i.chunkSize);let a=this.internalTrack.demuxer.chunkReader.readRange(i.sampleOffset,i.sampleOffset+i.sampleSize),n=new 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t=I(this.internalTrack.fragments,e,a=>a.trackData.get(this.internalTrack.id).startTimestamp),s=-1,i=!1;if(t!==-1){let n=this.internalTrack.fragments[t].trackData.get(this.internalTrack.id),c=I(n.presentationTimestamps,e,o=>o.presentationTimestamp);m(c!==-1),s=n.presentationTimestamps[c].sampleIndex,i=ea.trackData.get(this.internalTrack.id).startTimestamp),s=-1,i=!1;if(t!==-1){let n=this.internalTrack.fragments[t].trackData.get(this.internalTrack.id),c=n.presentationTimestamps.findLastIndex(u=>n.samples[u.sampleIndex].isKeyFrame);if(c===-1)throw new Error("Not supported: Fragment does not contain key sample.");s=n.presentationTimestamps[c].sampleIndex,i=ex.timestamp);p!==-1&&(b=this.internalTrack.fragmentLookupTable[p])}if(i===-1)u.pos=b?.moofOffset??0;else{let 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s=[],i=!1,a=null,{promise:n,resolve:c}=X(),o=!1,u=await this.createDecoder(g=>{let h=g.timestamp/1e6;if(h>=t&&(o=!0),o){g.close();return}a&&(h>e?(s.push(a),i=!0):a.close()),h>=e&&(s.push(g),i=!0),a=i?null:g,s.length>0&&(c(),{promise:n,resolve:c}=X())}),d=await this.videoTrack._backing.getKeyChunk(e)??await this.videoTrack._backing.getFirstChunk();if(!d)return;let l=!1;(async()=>{let g=d,h=1/0;if(t<1/0){let x=await this.videoTrack._backing.getChunk(t),w=x?x.type==="key"&&x.timestamp/1e6===t?x:await this.videoTrack._backing.getNextKeyChunk(x):null;w&&(h=w.timestamp/1e6)}let p=new ve(this.videoTrack).chunks(d,h);for(await p.next();g&&!o;){u.decode(g),u.decodeQueueSize>=10&&await new Promise(w=>u.addEventListener("dequeue",w,{once:!0}));let x=await p.next();if(x.done)break;g=x.value}await p.return(),await u.flush(),u.close(),!i&&a&&s.push(a),l=!0,c()})();try{for(;;)if(s.length>0)yield s.shift();else if(!l)await n;else break}finally{o=!0}}};return gr(Ri);})(); if (typeof module === "object" 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a=t.type,c=this.validateAndNormalizeTimestamp(n.track,t.timestamp,a==="key"),u=this.createSampleForTrack(n,o,c,(t.duration??0)/1e6,a);await this.registerSample(n,u)}finally{s()}}async addSubtitleCue(e,t,i){let s=await this.mutex.acquire();try{let n=this.getSubtitleTrackData(e,i);this.validateAndNormalizeTimestamp(n.track,1e6*t.timestamp,!0),e.source._codec==="webvtt"&&(n.cueQueue.push(t),await this.processWebVTTCues(n,t.timestamp))}finally{s()}}async processWebVTTCues(e,t){for(;e.cueQueue.length>0;){let i=new Set([]);for(let u of e.cueQueue)d(u.timestamp<=t),d(e.lastCueEndTimestamp<=u.timestamp+u.duration),i.add(Math.max(u.timestamp,e.lastCueEndTimestamp)),i.add(u.timestamp+u.duration);let s=[...i].sort((u,l)=>u-l),n=s[0],o=s[1]??n;if(t=o)break;K.lastIndex=0;let f=K.test(l.text),g=l.timestamp+l.duration,x=e.cueToSourceId.get(l);if(x===void 0&&oi.timestamp).sort((i,s)=>i-s);for(let i=0;i{if(e===o)return t.type==="key";let a=o.sampleQueue[0];return 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t=[e.info.decoderConfig.description?{id:25506,data:U(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],i=e.info.decoderConfig.colorSpace,s={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},be(i)?{id:21936,data:[{id:21937,data:W[i.matrix]},{id:21946,data:F[i.transfer]},{id:21947,data:D[i.primaries]},{id:21945,data:i.fullRange?2:1}]}:null]};return t.push(s),t}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:U(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ue(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:_.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:qt,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return d(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;ve(t),d(t),d(t.decoderConfig),d(t.decoderConfig.codedWidth!==void 0),d(t.decoderConfig.codedHeight!==void 0);let s={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getAudioTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;_e(t),d(t),d(t.decoderConfig);let s={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getSubtitleTrackData(e,t){let i=this.trackDatas.find(n=>n.track===e);if(i)return i;Ae(t),d(t),d(t.config);let s={track:e,type:"subtitle",info:{config:t.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}async addEncodedVideoChunk(e,t,i){let s=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,i),o=new Uint8Array(t.byteLength);t.copyTo(o);let a=t.type==="key",c=this.validateAndNormalizeTimestamp(n.track,t.timestamp,a),u=this.createInternalChunk(o,c,(t.duration??0)/1e6,t.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(n,u),n.chunkQueue.push(u),await this.interleaveChunks()}finally{s()}}async 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this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getAudioTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Me(t),m(t),m(t.decoderConfig);let i={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},timescale:t.decoderConfig.sampleRate,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getSubtitleTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;ze(t),m(t),m(t.config);let i={track:e,type:"subtitle",info:{config:t.config},timescale:1e3,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[],lastCueEndTimestamp:0,cueQueue:[],nextSourceId:0,cueToSourceId:new WeakMap};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),this.validateAndNormalizeTimestamp(e,0,!0),i}async addEncodedVideoChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getVideoTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=this.validateAndNormalizeTimestamp(a.track,t.timestamp,t.type==="key"),o=this.createSampleForTrack(a,n,c,(t.duration??0)/1e6,t.type);await this.registerSample(a,o)}finally{i()}}async addEncodedAudioChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getAudioTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type,o=this.validateAndNormalizeTimestamp(a.track,t.timestamp,c==="key"),u=this.createSampleForTrack(a,n,o,(t.duration??0)/1e6,c);await this.registerSample(a,u)}finally{i()}}async addSubtitleCue(e,t,s){let i=await this.mutex.acquire();try{let a=this.getSubtitleTrackData(e,s);this.validateAndNormalizeTimestamp(a.track,1e6*t.timestamp,!0),e.source._codec==="webvtt"&&(a.cueQueue.push(t),await this.processWebVTTCues(a,t.timestamp))}finally{i()}}async processWebVTTCues(e,t){for(;e.cueQueue.length>0;){let s=new Set([]);for(let u of e.cueQueue)m(u.timestamp<=t),m(e.lastCueEndTimestamp<=u.timestamp+u.duration),s.add(Math.max(u.timestamp,e.lastCueEndTimestamp)),s.add(u.timestamp+u.duration);let i=[...s].sort((u,d)=>u-d),a=i[0],n=i[1]??a;if(t=n)break;J.lastIndex=0;let l=J.test(d.text),g=d.timestamp+d.duration,h=e.cueToSourceId.get(d);if(h===void 0&&ns.timestamp).sort((s,i)=>s-i);for(let s=0;s{if(e===n)return t.type==="key";let c=n.sampleQueue[0];return c&&c.type==="key"});i>=1&&a&&(s=!0,await this.finalizeFragment())}else s=i>=.5}s&&(e.currentChunk&&await this.finalizeCurrentChunk(e),e.currentChunk={startTimestamp:t.timestamp,samples:[],offset:null,moofOffset:null}),m(e.currentChunk),e.currentChunk.samples.push(t),e.timestampProcessingQueue.push(t)}async finalizeCurrentChunk(e){if(m(this.fastStart!=="fragmented"),!!e.currentChunk){if(e.finalizedChunks.push(e.currentChunk),this.finalizedChunks.push(e.currentChunk),(e.compactlyCodedChunkTable.length===0||_(e.compactlyCodedChunkTable).samplesPerChunk!==e.currentChunk.samples.length)&&e.compactlyCodedChunkTable.push({firstChunk:e.finalizedChunks.length,samplesPerChunk:e.currentChunk.samples.length}),this.fastStart==="in-memory"){e.currentChunk.offset=0;return}e.currentChunk.offset=this.writer.getPos();for(let t of e.currentChunk.samples)m(t.data),this.writer.write(t.data),t.data=null;await this.writer.flush()}}async interleaveSamples(){m(this.fastStart==="fragmented");for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let i of this.trackDatas){if(i.sampleQueue.length===0&&!i.track.source._closed)break e;i.sampleQueue.length>0&&i.sampleQueue[0].timestampo.currentChunk),i=this.writer.getPos(),a=et(t,s);this.boxWriter.writeBox(a);{let o=Ae(!1),u=0;for(let l of s)for(let g of l.currentChunk.samples)u+=g.size;let d=this.boxWriter.measureBox(o)+u;d>=2**32&&(o.largeSize=!0,d=this.boxWriter.measureBox(o)+u),o.size=d,this.boxWriter.writeBox(o)}for(let o of s){o.currentChunk.offset=this.writer.getPos(),o.currentChunk.moofOffset=i;for(let u of o.currentChunk.samples)this.writer.write(u.data),u.data=null}let n=this.writer.getPos();this.writer.seek(this.boxWriter.offsets.get(a));let c=et(t,s);this.boxWriter.writeBox(c),this.writer.seek(n);for(let o of s)o.finalizedChunks.push(o.currentChunk),this.finalizedChunks.push(o.currentChunk),o.currentChunk=null;e&&await this.writer.flush()}async onTrackClose(e){let t=await this.mutex.acquire();if(e.type==="subtitle"&&e.source._codec==="webvtt"){let s=this.trackDatas.find(i=>i.track===e);s&&await this.processWebVTTCues(s,1/0)}this.fastStart==="fragmented"&&await this.interleaveSamples(),t()}async finalize(){let e=await this.mutex.acquire();for(let t of this.trackDatas)t.type==="subtitle"&&t.track.source._codec==="webvtt"&&await this.processWebVTTCues(t,1/0);if(this.fastStart==="fragmented"){for(let t of this.trackDatas){for(let s of t.sampleQueue)await this.addSampleToTrack(t,s);this.processTimestamps(t)}await this.finalizeFragment(!1)}else for(let t of this.trackDatas)this.processTimestamps(t),await this.finalizeCurrentChunk(t);if(this.fastStart==="in-memory"){m(this.mdat);let t;for(let i=0;i<2;i++){let a=le(this.trackDatas,this.creationTime),n=this.boxWriter.measureBox(a);t=this.boxWriter.measureBox(this.mdat);let c=this.writer.getPos()+n+t;for(let o of this.finalizedChunks){o.offset=c;for(let{data:u}of o.samples)m(u),c+=u.byteLength,t+=u.byteLength}if(c<2**32)break;t>=2**32&&(this.mdat.largeSize=!0)}let s=le(this.trackDatas,this.creationTime);this.boxWriter.writeBox(s),this.mdat.size=t,this.boxWriter.writeBox(this.mdat);for(let i of this.finalizedChunks)for(let a of i.samples)m(a.data),this.writer.write(a.data),a.data=null}else if(this.fastStart==="fragmented"){let t=this.writer.getPos(),s=Bt(this.trackDatas);this.boxWriter.writeBox(s);let i=this.writer.getPos()-t;this.writer.seek(this.writer.getPos()-4),this.boxWriter.writeU32(i)}else{m(this.mdat),m(this.ftypSize!==null);let t=this.boxWriter.offsets.get(this.mdat);m(t!==void 0);let s=this.writer.getPos()-t;this.mdat.size=s,this.mdat.largeSize=s>=2**32,this.boxWriter.patchBox(this.mdat);let i=le(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(i);let a=t-this.writer.getPos();this.boxWriter.writeBox(Dt(a))}else this.boxWriter.writeBox(i)}e()}};var he=class{value;constructor(e){this.value=e}},se=class{value;constructor(e){this.value=e}},be=class{value;constructor(e){this.value=e}};var rt=r=>r<256?1:r<65536?2:r<1<<24?3:r<2**32?4:r<2**40?5:6,it=r=>r>=-64&&r<64?1:r>=-8192&&r<8192?2:r>=-(1<<20)&&r<1<<20?3:r>=-(1<<27)&&r<1<<27?4:r>=-(2**34)&&r<2**34?5:6,Jt=r=>{if(r<127)return 1;if(r<16383)return 2;if(r<(1<<21)-1)return 3;if(r<(1<<28)-1)return 4;if(r<2**35-1)return 5;if(r<2**42-1)return 6;throw new Error("EBML VINT size not supported "+r)};var st=2**15,er="https://github.com/Vanilagy/webm-muxer",tr=6,rr=5,ci={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},ui={video:1,audio:2,subtitle:17},De=class extends ee{timestampsMustStartAtZero=!1;writer;format;helper=new Uint8Array(8);helperView=new DataView(this.helper.buffer);offsets=new WeakMap;dataOffsets=new WeakMap;trackDatas=[];segment=null;segmentInfo=null;seekHead=null;tracksElement=null;segmentDuration=null;cues=null;currentCluster=null;currentClusterMsTimestamp=null;trackDatasInCurrentCluster=new Set;duration=0;constructor(e,t){super(e),this.writer=e._writer,this.format=t,this.format._options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,t=rt(e)){let s=0;switch(t){case 6:this.helperView.setUint8(s++,e/2**40|0);case 5:this.helperView.setUint8(s++,e/2**32|0);case 4:this.helperView.setUint8(s++,e>>24);case 3:this.helperView.setUint8(s++,e>>16);case 2:this.helperView.setUint8(s++,e>>8);case 1:this.helperView.setUint8(s++,e);break;default:throw new Error("Bad UINT size "+t)}this.writer.write(this.helper.subarray(0,s))}writeSignedInt(e,t=it(e)){e<0&&(e+=2**(t*8)),this.writeUnsignedInt(e,t)}writeEBMLVarInt(e,t=Jt(e)){let s=0;switch(t){case 1:this.helperView.setUint8(s++,128|e);break;case 2:this.helperView.setUint8(s++,64|e>>8),this.helperView.setUint8(s++,e);break;case 3:this.helperView.setUint8(s++,32|e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 4:this.helperView.setUint8(s++,16|e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 5:this.helperView.setUint8(s++,8|e/2**32&7),this.helperView.setUint8(s++,e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;case 6:this.helperView.setUint8(s++,4|e/2**40&3),this.helperView.setUint8(s++,e/2**32|0),this.helperView.setUint8(s++,e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;default:throw new Error("Bad EBML VINT size "+t)}this.writer.write(this.helper.subarray(0,s))}writeString(e){this.writer.write(new Uint8Array(e.split("").map(t=>t.charCodeAt(0))))}writeEBML(e){if(e!==null){if(e instanceof Uint8Array)this.writer.write(e);else if(Array.isArray(e))for(let t of e)this.writeEBML(t);else if(this.offsets.set(e,this.writer.getPos()),this.writeUnsignedInt(e.id),Array.isArray(e.data)){let t=this.writer.getPos(),s=e.size===-1?1:e.size??4;e.size===-1?this.writeByte(255):this.writer.seek(this.writer.getPos()+s);let i=this.writer.getPos();if(this.dataOffsets.set(e,i),this.writeEBML(e.data),e.size!==-1){let a=this.writer.getPos()-i,n=this.writer.getPos();this.writer.seek(t),this.writeEBMLVarInt(a,s),this.writer.seek(n)}}else if(typeof e.data=="number"){let t=e.size??rt(e.data);this.writeEBMLVarInt(t),this.writeUnsignedInt(e.data,t)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof he)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof se)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof be){let t=e.size??it(e.data.value);this.writeEBMLVarInt(t),this.writeSignedInt(e.data.value,t)}}}beforeTrackAdd(e){if(this.format instanceof ae)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. Switching to MKV removes this restriction.")}async start(){let e=await this.mutex.acquire();this.writeEBMLHeader(),this.format._options.streamable||this.createSeekHead(),this.createSegmentInfo(),this.createCues(),await this.writer.flush(),e()}writeEBMLHeader(){let e={id:440786851,data:[{id:17030,data:1},{id:17143,data:1},{id:17138,data:4},{id:17139,data:8},{id:17026,data:this.format instanceof ae?"webm":"matroska"},{id:17031,data:2},{id:17029,data:2}]};this.writeEBML(e)}createSeekHead(){let e=new Uint8Array([28,83,187,107]),t=new Uint8Array([21,73,169,102]),s=new Uint8Array([22,84,174,107]),i={id:290298740,data:[{id:19899,data:[{id:21419,data:e},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:t},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:s},{id:21420,size:5,data:0}]}]};this.seekHead=i}createSegmentInfo(){let e={id:17545,data:new se(0)};this.segmentDuration=e;let t={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:er},{id:22337,data:er},this.format._options.streamable?null:e]};this.segmentInfo=t}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let t of this.trackDatas)e.data.push({id:174,data:[{id:215,data:t.track.id},{id:29637,data:t.track.id},{id:131,data:ui[t.type]},{id:134,data:ci[t.track.source._codec]},t.type==="video"?this.videoSpecificTrackInfo(t):null,t.type==="audio"?this.audioSpecificTrackInfo(t):null,t.type==="subtitle"?this.subtitleSpecificTrackInfo(t):null]})}videoSpecificTrackInfo(e){let t=[e.info.decoderConfig.description?{id:25506,data:L(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],s=e.info.decoderConfig.colorSpace,i={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},ye(s)?{id:21936,data:[{id:21937,data:K[s.matrix]},{id:21946,data:Q[s.transfer]},{id:21947,data:$[s.primaries]},{id:21945,data:s.fullRange?2:1}]}:null]};return t.push(i),t}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:L(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new he(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:O.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:tr,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return m(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Fe(t),m(t),m(t.decoderConfig),m(t.decoderConfig.codedWidth!==void 0),m(t.decoderConfig.codedHeight!==void 0);let i={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getAudioTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;Me(t),m(t),m(t.decoderConfig);let i={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}getSubtitleTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;ze(t),m(t),m(t.config);let i={track:e,type:"subtitle",info:{config:t.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(i),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),i}async addEncodedVideoChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getVideoTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type==="key",o=this.validateAndNormalizeTimestamp(a.track,t.timestamp,c),u=this.createInternalChunk(n,o,(t.duration??0)/1e6,t.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(a,u),a.chunkQueue.push(u),await this.interleaveChunks()}finally{i()}}async addEncodedAudioChunk(e,t,s){let i=await this.mutex.acquire();try{let a=this.getAudioTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let c=t.type,o=c==="key",u=this.validateAndNormalizeTimestamp(a.track,t.timestamp,o),d=this.createInternalChunk(n,u,(t.duration??0)/1e6,c);a.chunkQueue.push(d),await this.interleaveChunks()}finally{i()}}async addSubtitleCue(e,t,s){let i=await this.mutex.acquire();try{let a=this.getSubtitleTrackData(e,s),n=this.validateAndNormalizeTimestamp(a.track,1e6*t.timestamp,!0),c=t.text,o=Math.floor(n*1e3);J.lastIndex=0,c=c.replace(J,g=>{let b=Ie(g.slice(1,-1))-o;return`<${_e(b)}>`});let u=O.encode(c),d=`${t.settings??""} ${t.identifier??""} -${t.notes??""}`,f=this.createInternalChunk(u,o,t.duration,"key",l.trim()?_.encode(l):null);n.chunkQueue.push(f),await this.interleaveChunks()}finally{s()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let s of this.trackDatas){if(s.chunkQueue.length===0&&!s.track.source._closed)break e;s.chunkQueue.length>0&&s.chunkQueue[0].timestamp=2&&i++;let c={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];kt(t.data,i+0,i+3,c)}createInternalChunk(e,t,i,s,n=null){return{data:e,type:s,timestamp:t,duration:i,additions:n}}writeBlock(e,t){this.segment||(this.createTracks(),this.createSegment());let i=Math.floor(1e3*t.timestamp),s=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return t.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||s&&i-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(i);let n=i-this.currentClusterMsTimestamp;if(n<0)return;if(n>=Ge)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${Ge} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${Ge} milliseconds.`);let a=new Uint8Array(4),c=new DataView(a.buffer);c.setUint8(0,128|e.track.id),c.setInt16(1,n,!1);let u=Math.floor(1e3*t.duration);if(u===0&&!t.additions){c.setUint8(3,+(t.type==="key")<<7);let l={id:163,data:[a,t.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[a,t.data]},t.type==="delta"?{id:251,data:new de(e.lastWrittenMsTimestamp-i)}:null,t.additions?{id:30113,data:[{id:166,data:[{id:165,data:t.additions},{id:238,data:1}]}]}:null,u>0?{id:155,data:u}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,i+u),e.lastWrittenMsTimestamp=i,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:Xt,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){d(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),t=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,Xt),this.writer.seek(t);let i=this.offsets.get(this.currentCluster)-this.segmentDataOffset;d(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(s=>({id:183,data:[{id:247,data:s.track.id},{id:241,data:i}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let t of this.trackDatas)for(;t.chunkQueue.length>0;)this.writeBlock(t,t.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),d(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let t=this.writer.getPos(),i=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(i,qt),this.segmentDuration.data=new Z(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(t)}e()}};var Q=class{},Ye=class extends Q{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(e.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=e}_createMuxer(e){return new Ee(e,this)}},Oe=class extends Q{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.streamable!==void 0&&typeof e.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=e}_createMuxer(e){return new Ie(e,this)}},J=class extends Oe{};var ee=class{_connectedTrack=null;_closed=!1;_offsetTimestamps=!1;_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},V=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!G.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${G.join(", ")}.`);this._codec=e}},Ze=class extends V{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,e,t)}},ti=5,ri=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!G.includes(r.codec))throw new TypeError(`Invalid video codec '${r.codec}'. Must be one of: ${G.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(r.latencyMode!==void 0&&!["quality","realtime"].includes(r.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},le=class{constructor(e,t){this.source=e;this.codecConfig=t;ri(t)}encoder=null;muxer=null;lastMultipleOfKeyFrameInterval=-1;lastWidth=null;lastHeight=null;async digest(e){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(e.codedWidth!==this.lastWidth||e.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${e.codedWidth}x${e.codedHeight}.`)}else this.lastWidth=e.codedWidth,this.lastHeight=e.codedHeight;this.ensureEncoder(e),d(this.encoder);let t=Math.floor(e.timestamp/1e6/ti);this.encoder.encode(e,{keyFrame:t!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=t,this.encoder.encodeQueueSize>=4&&await new Promise(i=>this.encoder.addEventListener("dequeue",i,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new VideoEncoder({output:(t,i)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,t,i),error:t=>console.error("Video encode error:",t)}),this.encoder.configure({codec:Wt(this.codecConfig.codec,e.codedWidth,e.codedHeight,this.codecConfig.bitrate),width:e.codedWidth,height:e.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...Qt(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},Je=class extends V{_encoder;constructor(e){super(e.codec),this._encoder=new le(this,e)}digest(e){if(!(e instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},et=class extends V{_encoder;_canvas;constructor(e,t){if(!(e instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(t.codec),this._encoder=new le(this,t),this._canvas=e}digest(e,t=0){if(!Number.isFinite(e)||e<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(t)||t<0)throw new TypeError("duration must be a non-negative number.");let i=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*e),duration:Math.round(1e6*t),alpha:"discard"}),s=this._encoder.digest(i);return i.close(),s}_flush(){return this._encoder.flush()}},tt=class extends V{_encoder;_abortController=null;_track;_offsetTimestamps=!0;constructor(e,t){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");t={...t,latencyMode:"realtime"},super(t.codec),this._encoder=new le(this,t),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),t=new WritableStream({write:i=>{this._encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},R=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!Y.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${Y.join(", ")}.`);this._codec=e}},rt=class extends R{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,e,t)}},ii=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!Y.includes(r.codec))throw new TypeError(`Invalid audio codec '${r.codec}'. Must be one of: ${Y.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},me=class{constructor(e,t){this.source=e;this.codecConfig=t;ii(t)}encoder=null;muxer=null;lastNumberOfChannels=null;lastSampleRate=null;async digest(e){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(e.numberOfChannels!==this.lastNumberOfChannels||e.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${e.numberOfChannels} channels at ${e.sampleRate} Hz.`)}else this.lastNumberOfChannels=e.numberOfChannels,this.lastSampleRate=e.sampleRate;this.ensureEncoder(e),d(this.encoder),this.encoder.encode(e),this.encoder.encodeQueueSize>=4&&await new Promise(t=>this.encoder.addEventListener("dequeue",t,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new AudioEncoder({output:(t,i)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,t,i),error:t=>console.error("Audio encode error:",t)}),this.encoder.configure({codec:Ht(this.codecConfig.codec,e.numberOfChannels,e.sampleRate),numberOfChannels:e.numberOfChannels,sampleRate:e.sampleRate,bitrate:this.codecConfig.bitrate,...$t(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},it=class extends R{_encoder;constructor(e){super(e.codec),this._encoder=new me(this,e)}digest(e){if(!(e instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},st=class extends R{_encoder;_accumulatedFrameCount=0;constructor(e){super(e.codec),this._encoder=new me(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let t=e.numberOfChannels,i=e.sampleRate,s=e.length,n=new Float32Array(t*s);for(let c=0;c{this._encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},te=class extends ee{_connectedTrack=null;_codec;constructor(e){if(super(),!ye.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${ye.join(", ")}.`);this._codec=e}},ot=class extends te{_parser;constructor(e){super(e),this._parser=new ke({codec:e,output:(t,i)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,t,i),error:t=>console.error("Subtitle parse error:",t)})}digest(e){if(typeof e!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(e),this._connectedTrack.output._muxer.mutex.currentPromise}};var at=class{_muxer;_writer;_tracks=[];_started=!1;_finalizing=!1;_mutex=new j;constructor(e){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(!(e.format instanceof Q))throw new TypeError("options.format must be an OutputFormat.");if(!(e.target instanceof L))throw new TypeError("options.target must be a Target.");if(e.target._output)throw new Error("Target is already used for another output.");e.target._output=this,this._writer=e.target._createWriter(),this._muxer=e.format._createMuxer(this)}addVideoTrack(e,t={}){if(!(e instanceof V))throw new TypeError("source must be a VideoSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");if(typeof t.rotation=="number"&&![0,90,180,270].includes(t.rotation))throw new TypeError(`Invalid video rotation: ${t.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(t.rotation)&&(t.rotation.length!==9||t.rotation.some(i=>!Number.isFinite(i))))throw new TypeError(`Invalid video transformation matrix: ${t.rotation.join()}`);if(t.frameRate!==void 0&&(!Number.isInteger(t.frameRate)||t.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${t.frameRate}. Must be a positive integer.`);this._addTrack("video",e,t)}addAudioTrack(e,t={}){if(!(e instanceof R))throw new TypeError("source must be an AudioSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",e,t)}addSubtitleTrack(e,t={}){if(!(e instanceof te))throw new TypeError("source must be a SubtitleSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",e,t)}_addTrack(e,t,i){if(this._started)throw new Error("Cannot add track after output has started.");if(t._connectedTrack)throw new Error("Source is already used for a track.");let s={id:this._tracks.length+1,output:this,type:e,source:t,metadata:i};this._muxer.beforeTrackAdd(s),this._tracks.push(s),t._connectedTrack=s}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let e=await this._mutex.acquire();await this._muxer.start();for(let t of this._tracks)t.source._start();e()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let e=await this._mutex.acquire(),t=this._tracks.map(i=>i.source._flush());await Promise.all(t),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),e()}};var fe=class{_sizePromise=null;_getSize(){return this._sizePromise??=this._retrieveSize()}},ct=class extends fe{constructor(t){super();this.buffer=t}async _read(t,i){return new Uint8Array(this.buffer,t,i-t)}async _retrieveSize(){return this.buffer.byteLength}},ut=class extends fe{constructor(t){super();this.blob=t}async _read(t,i){let n=await this.blob.slice(t,i).arrayBuffer();return new Uint8Array(n)}async _retrieveSize(){return this.blob.size}};var re=class{input;constructor(e){this.input=e}};var Ve=class{_backing;constructor(e){this._backing=e}isVideoTrack(){return this instanceof he}isAudioTrack(){return this instanceof pe}getDuration(){return this._backing.getDuration()}},he=class extends Ve{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getWidth(){return this._backing.getWidth()}getHeight(){return this._backing.getHeight()}getRotation(){return this._backing.getRotation()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},pe=class extends Ve{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var Re=4096,ie=class{constructor(e,t=1/0){this.source=e;this.maxStorableBytes=t}loadedSegments=[];loadingSegments=[];sourceSizePromise=null;nextAge=0;totalStoredBytes=0;async loadRange(e,t){let i=Math.floor(e/Re)*Re,s=Math.ceil(t/Re)*Re;s=Math.min(s,await this.source._getSize());let n=this.loadingSegments.find(l=>l.start<=i&&l.end>=s);if(n){await n.promise;return}if(this.loadedSegments.some(l=>l.start<=i&&l.end>=s))return;let a=this.source._read(i,s),c={start:i,end:s,promise:a};this.loadingSegments.push(c);let u=await a;yt(this.loadingSegments,c),this.insertIntoLoadedSegments(i,u)}insertIntoLoadedSegments(e,t){let i={start:e,end:e+t.byteLength,bytes:t,view:new DataView(t.buffer),age:this.nextAge++},s=E(this.loadedSegments,e,n=>n.start);(s===-1||this.loadedSegments[s].start=i.end)break;i.start<=o.start&&o.end<=i.end&&(this.loadedSegments.splice(n,1),n--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let n=null,o=-1;for(let a=0;an.start),s=null;if(i!==-1)for(let n=i;ne)break;if(t<=o.end){s=o;break}}if(!s)throw new Error(`No segment loaded for range [${e}, ${t}).`);return s.age=this.nextAge++,{view:s.view,offset:s.bytes.byteOffset+e-s.start}}};var $=class{constructor(e){this.reader=e}pos=0;readRange(e,t){let{view:i,offset:s}=this.reader.getViewAndOffset(e,t);return new Uint8Array(i.buffer,s,t-e)}readU8(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,e.getUint8(t)}readU16(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,e.getUint16(t,!1)}readU24(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let i=e.getUint16(t,!1),s=e.getUint8(t+2);return i*256+s}readS32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getUint32(t,!1)}readI32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU64(){let e=this.readU32(),t=this.readU32();return e*4294967296+t}readF64(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,e.getFloat64(t,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(e){let{view:t,offset:i}=this.reader.getViewAndOffset(this.pos,this.pos+e);this.pos+=e;let s="";for(let n=0;ne.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let t=await Promise.all(this.tracks.map(s=>s.inputTrack.getCodecMimeType())),i=[...new Set(t)];e+=`; codecs="${i.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.posi.presentationTimestamp-s.presentationTimestamp),e.sampleTable}readContiguousBoxes(e){let t=this.isobmffReader.pos;for(;this.isobmffReader.pos-tl.every((f,g)=>f===c[g]));u===-1?s.rotation=0:s.rotation=90*u}break;case"mdhd":{let s=this.currentTrack;d(s);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3,n===0?(this.isobmffReader.pos+=8,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU32()):n===1&&(this.isobmffReader.pos+=16,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let s=this.currentTrack;d(s),this.isobmffReader.pos+=8;let n=this.isobmffReader.readAscii(4);n==="vide"?s.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:n==="soun"&&(s.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let s=this.currentTrack;d(s),s.sampleTableOffset=e,this.readContiguousBoxes(t.contentSize)}break;case"stsd":{let s=this.currentTrack;if(d(s),s.info===null||s.sampleTable)break;let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let a=0;a0){if(u===1)this.isobmffReader.pos+=4*4;else if(u===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),x=this.isobmffReader.readU32(),C=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}s.info.numberOfChannels=l,s.info.sampleRate=f,this.readContiguousBoxes(e+c.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"hvcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"colr":{let s=this.currentTrack;if(d(s&&s.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),a=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=!!(this.isobmffReader.readU8()&128);s.info.colorSpace={primaries:gt[o],transfer:Tt[a],matrix:xt[c],fullRange:u}}break;case"wave":t.totalSize>8&&this.readContiguousBoxes(t.contentSize);break;case"esds":{let s=this.currentTrack;d(s&&s.info),this.isobmffReader.pos+=4;let n=this.isobmffReader.readU8();d(n===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),a=(o&128)!==0,c=(o&64)!==0,u=(o&32)!==0;if(a&&(this.isobmffReader.pos+=2),c){let C=this.isobmffReader.readU8();this.isobmffReader.pos+=C}u&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();d(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();d(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();d(g===5);let x=this.isobmffReader.readIsomVariableInteger();s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+x)}break;case"stts":{let s=this.currentTrack;if(d(s),!s.sampleTable)break;this.isobmffReader.pos+=4;let n=this.isobmffReader.readU32(),o=0,a=0;for(let c=0;c{let t=E(r.presentationTimestamps,e,i=>i.presentationTimestamp);return t===-1?-1:r.presentationTimestamps[t].sampleIndex},ni=(r,e)=>{let t=E(r.sampleTimingEntries,e,k=>k.startIndex),i=r.sampleTimingEntries[t];if(!i||i.startIndex+i.count<=e)return null;let n=i.startDecodeTimestamp+(e-i.startIndex)*i.delta,o=E(r.sampleCompositionTimeOffsets,e,k=>k.startIndex),a=r.sampleCompositionTimeOffsets[o];a&&(n+=a.offset);let c=r.sampleSizes[Math.min(e,r.sampleSizes.length-1)],u=E(r.sampleToChunk,e,k=>k.startSampleIndex),l=r.sampleToChunk[u];d(l);let f=l.startChunkIndex+Math.floor((e-l.startSampleIndex)/l.samplesPerChunk),g=r.chunkOffsets[f],x=0,C=g;if(r.sampleSizes.length===1)C+=c*(e-l.startSampleIndex),x+=c*l.samplesPerChunk;else{let k=l.startSampleIndex+(f-l.startChunkIndex)*l.samplesPerChunk;for(let S=k;Sk)!==-1:!0}},oi=(r,e)=>{if(!r.keySampleIndices)return e;let t=E(r.keySampleIndices,e,i=>i);return r.keySampleIndices[t]??-1},ai=(r,e)=>{if(!r.keySampleIndices)return e+1;let t=E(r.keySampleIndices,e,i=>i);return r.keySampleIndices[t+1]??-1};var ze=class extends re{};var Be=class{},mt=class extends Be{async _canReadInput(e){if(await e._mainReader.source._getSize()<8)return!1;await e._mainReader.loadRange(4,8);let i=new $(e._mainReader);return i.pos=4,i.readAscii(4)==="ftyp"}_createDemuxer(e){return new Me(e)}},ft=class extends Be{async _canReadInput(){return!1}_createDemuxer(e){return new ze(e)}},Ue=new mt,ci=Ue,ui=Ue,ht=new ft,Yt=ht,di=ht,li=[Ue,Yt];var pt=class{_source;_formats;_mainReader;_demuxerPromise=null;_format=null;constructor(e){this._formats=e.formats,this._source=e.source,this._mainReader=new ie(e.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{for(let e of this._formats)if(await e._canReadInput(this))return this._format=e,e._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),d(this._format),this._format}async getDuration(){return(await this._getDemuxer()).getDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(t=>t.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(t=>t.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(t=>t.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(t=>t.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var De=class{constructor(e){this.videoTrack=e}getFirstChunk(){return this.videoTrack._backing.getFirstChunk()}getChunk(e){return this.videoTrack._backing.getChunk(e)}getNextChunk(e){return this.videoTrack._backing.getNextChunk(e)}getKeyChunk(e){return this.videoTrack._backing.getKeyChunk(e)}getNextKeyChunk(e){return this.videoTrack._backing.getNextKeyChunk(e)}async*chunks(e,t=1/0){let i=[],{promise:s,resolve:n}=N(),{promise:o,resolve:a}=N(),c=!1,u=[],l=()=>Math.max(2,u.length);(async()=>{let f=e??await this.getFirstChunk();for(;f&&!c&&!(f.timestamp/1e6>=t);){if(i.length>l()){({promise:o,resolve:a}=N()),await o;continue}i.push(f),n(),{promise:s,resolve:n}=N(),f=await this.getNextChunk(f)}c=!0,n()})();try{for(;;)if(i.length>0){yield i.shift();let f=performance.now();for(u.push(f);u.length>0&&f-u[0]>=1e3;)u.shift();a()}else if(!c)await s;else break}finally{c=!0,a()}}},bt=class{constructor(e){this.videoTrack=e}decoderConfig=null;async createDecoder(e){this.decoderConfig||(this.decoderConfig=await this.videoTrack.getDecoderConfig());let t=new VideoDecoder({output:e,error:i=>console.error(i)});return t.configure(this.decoderConfig),t}async getKeyFrame(e){let t=null,i=await this.createDecoder(n=>t=n),s=await this.videoTrack._backing.getKeyChunk(e);return s?(i.decode(s),await i.flush(),i.close(),t):null}async getFrame(e){let t=null,i=await this.createDecoder(a=>{a.timestamp/1e6<=e?(t?.close(),t=a):a.close()}),s=await this.videoTrack._backing.getKeyChunk(e);if(!s)return null;let n=await this.videoTrack._backing.getChunk(e);d(n),i.decode(s);let o=s;for(;o!==n;){let a=await this.videoTrack._backing.getNextChunk(o);d(a),o=a,i.decode(a),i.decodeQueueSize>=10&&await new Promise(c=>i.addEventListener("dequeue",c,{once:!0}))}return await i.flush(),i.close(),t}async*frames(e=0,t=1/0){let i=[],s=!1,n=null,{promise:o,resolve:a}=N(),c=!1,u=await this.createDecoder(g=>{let x=g.timestamp/1e6;if(x>=t&&(c=!0),c){g.close();return}n&&(x>e?(i.push(n),s=!0):n.close()),x>=e&&(i.push(g),s=!0),n=s?null:g,i.length>0&&(a(),{promise:o,resolve:a}=N())}),l=await this.videoTrack._backing.getKeyChunk(e)??await this.videoTrack._backing.getFirstChunk();if(!l)return;let f=!1;(async()=>{let g=l,x=1/0;if(t<1/0){let S=await this.videoTrack._backing.getChunk(t),P=S?S.type==="key"&&S.timestamp/1e6===t?S:await this.videoTrack._backing.getNextKeyChunk(S):null;P&&(x=P.timestamp/1e6)}let k=new De(this.videoTrack).chunks(l,x);for(await k.next();g&&!c;){u.decode(g),u.decodeQueueSize>=10&&await new Promise(P=>u.addEventListener("dequeue",P,{once:!0}));let S=await k.next();if(S.done)break;g=S.value}await k.return(),await u.flush(),u.close(),!s&&n&&i.push(n),f=!0,a()})();try{for(;;)if(i.length>0)yield i.shift();else if(!f)await o;else break}finally{c=!0}}};export{li as ALL_FORMATS,Y as AUDIO_CODECS,ct as ArrayBufferSource,ce as ArrayBufferTarget,st as AudioBufferSource,it as AudioDataSource,R as AudioSource,ut as BlobSource,et as CanvasSource,rt as EncodedAudioChunkSource,De as EncodedVideoChunkDrain,Ze as EncodedVideoChunkSource,Ue as ISOBMFF,pt as Input,ht as MATROSKA,Yt as MKV,ui as MOV,ci as MP4,ee as MediaSource,nt as MediaStreamAudioTrackSource,tt as MediaStreamVideoTrackSource,Oe as MkvOutputFormat,Ye as Mp4OutputFormat,at as Output,Q as OutputFormat,ye as SUBTITLE_CODECS,fe as Source,Ke as StreamTarget,te as SubtitleSource,L as Target,ot as TextSubtitleSource,G as VIDEO_CODECS,bt as VideoFrameDrain,Je as VideoFrameSource,V as VideoSource,di as WEBM,J as WebMOutputFormat}; +${t.notes??""}`,l=this.createInternalChunk(u,n,t.duration,"key",d.trim()?O.encode(d):null);a.chunkQueue.push(l),await this.interleaveChunks()}finally{i()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(t=>t.track===e))return;e:for(;;){let e=null,t=1/0;for(let i of this.trackDatas){if(i.chunkQueue.length===0&&!i.track.source._closed)break e;i.chunkQueue.length>0&&i.chunkQueue[0].timestamp=2&&s++;let o={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];vt(t.data,s+0,s+3,o)}createInternalChunk(e,t,s,i,a=null){return{data:e,type:i,timestamp:t,duration:s,additions:a}}writeBlock(e,t){this.segment||(this.createTracks(),this.createSegment());let s=Math.floor(1e3*t.timestamp),i=this.trackDatas.every(d=>{if(d.track.source._closed)return!0;if(e===d)return t.type==="key";let l=d.chunkQueue[0];return l&&l.type==="key"});(!this.currentCluster||i&&s-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(s);let a=s-this.currentClusterMsTimestamp;if(a<0)return;if(a>=st)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${st} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${st} milliseconds.`);let c=new Uint8Array(4),o=new DataView(c.buffer);o.setUint8(0,128|e.track.id),o.setInt16(1,a,!1);let u=Math.floor(1e3*t.duration);if(u===0&&!t.additions){o.setUint8(3,+(t.type==="key")<<7);let d={id:163,data:[c,t.data]};this.writeEBML(d)}else{let d={id:160,data:[{id:161,data:[c,t.data]},t.type==="delta"?{id:251,data:new be(e.lastWrittenMsTimestamp-s)}:null,t.additions?{id:30113,data:[{id:166,data:[{id:165,data:t.additions},{id:238,data:1}]}]}:null,u>0?{id:155,data:u}:null]};this.writeEBML(d)}this.duration=Math.max(this.duration,s+u),e.lastWrittenMsTimestamp=s,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:rr,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){m(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),t=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,rr),this.writer.seek(t);let s=this.offsets.get(this.currentCluster)-this.segmentDataOffset;m(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(i=>({id:183,data:[{id:247,data:i.track.id},{id:241,data:s}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let t of this.trackDatas)for(;t.chunkQueue.length>0;)this.writeBlock(t,t.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),m(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let t=this.writer.getPos(),s=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(s,tr),this.segmentDuration.data=new se(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(t)}e()}};var G=class{},at=class extends G{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(e.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=e}_createMuxer(e){return new Pe(e,this)}},Ue=class extends G{_options;constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.streamable!==void 0&&typeof e.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=e}_createMuxer(e){return new De(e,this)}},ae=class extends Ue{};var ne=class{_connectedTrack=null;_closed=!1;_offsetTimestamps=!1;_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},P=class extends ne{_connectedTrack=null;_codec;constructor(e){if(super(),!re.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${re.join(", ")}.`);this._codec=e}},nt=class extends P{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,e,t)}},mi=5,di=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!re.includes(r.codec))throw new TypeError(`Invalid video codec '${r.codec}'. Must be one of: ${re.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(r.latencyMode!==void 0&&!["quality","realtime"].includes(r.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},ge=class{constructor(e,t){this.source=e;this.codecConfig=t;di(t)}encoder=null;muxer=null;lastMultipleOfKeyFrameInterval=-1;lastWidth=null;lastHeight=null;async digest(e){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(e.codedWidth!==this.lastWidth||e.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${e.codedWidth}x${e.codedHeight}.`)}else this.lastWidth=e.codedWidth,this.lastHeight=e.codedHeight;this.ensureEncoder(e),m(this.encoder);let t=Math.floor(e.timestamp/1e6/mi);this.encoder.encode(e,{keyFrame:t!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=t,this.encoder.encodeQueueSize>=4&&await new Promise(s=>this.encoder.addEventListener("dequeue",s,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new VideoEncoder({output:(t,s)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,t,s),error:t=>console.error("Video encode error:",t)}),this.encoder.configure({codec:jt(this.codecConfig.codec,e.codedWidth,e.codedHeight,this.codecConfig.bitrate),width:e.codedWidth,height:e.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...Yt(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},ot=class extends P{_encoder;constructor(e){super(e.codec),this._encoder=new ge(this,e)}digest(e){if(!(e instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},ct=class extends P{_encoder;_canvas;constructor(e,t){if(!(e instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(t.codec),this._encoder=new ge(this,t),this._canvas=e}digest(e,t=0){if(!Number.isFinite(e)||e<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(t)||t<0)throw new TypeError("duration must be a non-negative number.");let s=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*e),duration:Math.round(1e6*t),alpha:"discard"}),i=this._encoder.digest(s);return s.close(),i}_flush(){return this._encoder.flush()}},ut=class extends P{_encoder;_abortController=null;_track;_offsetTimestamps=!0;constructor(e,t){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");t={...t,latencyMode:"realtime"},super(t.codec),this._encoder=new ge(this,t),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),t=new WritableStream({write:s=>{this._encoder.digest(s),s.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},D=class extends ne{_connectedTrack=null;_codec;constructor(e){if(super(),!ie.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${ie.join(", ")}.`);this._codec=e}},mt=class extends D{constructor(e){super(e)}digest(e,t){if(!(e instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,e,t)}},li=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!ie.includes(r.codec))throw new TypeError(`Invalid audio codec '${r.codec}'. Must be one of: ${ie.join(", ")}.`);if(!Number.isInteger(r.bitrate)||r.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},ke=class{constructor(e,t){this.source=e;this.codecConfig=t;li(t)}encoder=null;muxer=null;lastNumberOfChannels=null;lastSampleRate=null;async digest(e){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(e.numberOfChannels!==this.lastNumberOfChannels||e.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${e.numberOfChannels} channels at ${e.sampleRate} Hz.`)}else this.lastNumberOfChannels=e.numberOfChannels,this.lastSampleRate=e.sampleRate;this.ensureEncoder(e),m(this.encoder),this.encoder.encode(e),this.encoder.encodeQueueSize>=4&&await new Promise(t=>this.encoder.addEventListener("dequeue",t,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(e){this.encoder||(this.encoder=new AudioEncoder({output:(t,s)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,t,s),error:t=>console.error("Audio encode error:",t)}),this.encoder.configure({codec:Xt(this.codecConfig.codec,e.numberOfChannels,e.sampleRate),numberOfChannels:e.numberOfChannels,sampleRate:e.sampleRate,bitrate:this.codecConfig.bitrate,...Zt(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},dt=class extends D{_encoder;constructor(e){super(e.codec),this._encoder=new ke(this,e)}digest(e){if(!(e instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(e)}_flush(){return this._encoder.flush()}},lt=class extends D{_encoder;_accumulatedFrameCount=0;constructor(e){super(e.codec),this._encoder=new ke(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let t=e.numberOfChannels,s=e.sampleRate,i=e.length,a=new Float32Array(t*i);for(let o=0;o{this._encoder.digest(s),s.close()}});e.readable.pipeTo(t,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},oe=class extends ne{_connectedTrack=null;_codec;constructor(e){if(super(),!Ve.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Ve.join(", ")}.`);this._codec=e}},pt=class extends oe{_parser;constructor(e){super(e),this._parser=new ve({codec:e,output:(t,s)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,t,s),error:t=>console.error("Subtitle parse error:",t)})}digest(e){if(typeof e!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(e),this._connectedTrack.output._muxer.mutex.currentPromise}};var ht=class{_muxer;_writer;_tracks=[];_started=!1;_finalizing=!1;_mutex=new U;constructor(e){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(!(e.format instanceof G))throw new TypeError("options.format must be an OutputFormat.");if(!(e.target instanceof X))throw new TypeError("options.target must be a Target.");if(e.target._output)throw new Error("Target is already used for another output.");e.target._output=this,this._writer=e.target._createWriter(),this._muxer=e.format._createMuxer(this)}addVideoTrack(e,t={}){if(!(e instanceof P))throw new TypeError("source must be a VideoSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");if(typeof t.rotation=="number"&&![0,90,180,270].includes(t.rotation))throw new TypeError(`Invalid video rotation: ${t.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(t.rotation)&&(t.rotation.length!==9||t.rotation.some(s=>!Number.isFinite(s))))throw new TypeError(`Invalid video transformation matrix: ${t.rotation.join()}`);if(t.frameRate!==void 0&&(!Number.isInteger(t.frameRate)||t.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${t.frameRate}. Must be a positive integer.`);this._addTrack("video",e,t)}addAudioTrack(e,t={}){if(!(e instanceof D))throw new TypeError("source must be an AudioSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",e,t)}addSubtitleTrack(e,t={}){if(!(e instanceof oe))throw new TypeError("source must be a SubtitleSource.");if(!t||typeof t!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",e,t)}_addTrack(e,t,s){if(this._started)throw new Error("Cannot add track after output has started.");if(t._connectedTrack)throw new Error("Source is already used for a track.");let i={id:this._tracks.length+1,output:this,type:e,source:t,metadata:s};this._muxer.beforeTrackAdd(i),this._tracks.push(i),t._connectedTrack=i}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let e=await this._mutex.acquire();await this._muxer.start();for(let t of this._tracks)t.source._start();e()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let e=await this._mutex.acquire(),t=this._tracks.map(s=>s.source._flush());await Promise.all(t),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),e()}};var Te=class{_sizePromise=null;_getSize(){return this._sizePromise??=this._retrieveSize()}},bt=class extends Te{constructor(t){super();this.buffer=t}async _read(t,s){return new Uint8Array(this.buffer,t,s-t)}async _retrieveSize(){return this.buffer.byteLength}},gt=class extends Te{constructor(t){super();this.blob=t}async _read(t,s){let a=await this.blob.slice(t,s).arrayBuffer();return new Uint8Array(a)}async _retrieveSize(){return this.blob.size}};var ce=class{input;constructor(e){this.input=e}};var Be=class{_backing;constructor(e){this._backing=e}isVideoTrack(){return this instanceof xe}isAudioTrack(){return this instanceof Se}getDuration(){return this._backing.getDuration()}},xe=class extends Be{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getWidth(){return this._backing.getWidth()}getHeight(){return this._backing.getHeight()}getRotation(){return this._backing.getRotation()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},Se=class extends Be{_backing;constructor(e){super(e),this._backing=e}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var ue=class{constructor(e,t=1/0){this.source=e;this.maxStorableBytes=t}loadedSegments=[];loadingSegments=[];sourceSizePromise=null;nextAge=0;totalStoredBytes=0;async loadRange(e,t){t=Math.min(t,await this.source._getSize());let s=this.loadingSegments.find(o=>o.start<=e&&o.end>=t);if(s){await s.promise;return}if(this.loadedSegments.some(o=>o.start<=e&&o.end>=t))return;let a=this.source._read(e,t),n={start:e,end:t,promise:a};this.loadingSegments.push(n);let c=await a;Et(this.loadingSegments,n),this.insertIntoLoadedSegments(e,c)}insertIntoLoadedSegments(e,t){let s={start:e,end:e+t.byteLength,bytes:t,view:new DataView(t.buffer),age:this.nextAge++},i=I(this.loadedSegments,e,a=>a.start);(i===-1||this.loadedSegments[i].start=s.end)break;s.start<=n.start&&n.end<=s.end&&(this.loadedSegments.splice(a,1),a--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let a=null,n=-1;for(let c=0;ca.start),i=null;if(s!==-1)for(let a=s;ae)break;if(t<=n.end){i=n;break}}if(!i)throw new Error(`No segment loaded for range [${e}, ${t}).`);return i.age=this.nextAge++,{view:i.view,offset:i.bytes.byteOffset+e-i.start}}forgetRange(e,t){if(t<=e)return;let s=I(this.loadedSegments,e,a=>a.start);if(s===-1)return;let i=this.loadedSegments[s];i.start!==e||i.end!==t||(this.loadedSegments.splice(s,1),this.totalStoredBytes-=i.bytes.byteLength)}};var Y=class{constructor(e){this.reader=e}pos=0;readRange(e,t){let{view:s,offset:i}=this.reader.getViewAndOffset(e,t);return new Uint8Array(s.buffer,i,t-e)}readU8(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,e.getUint8(t)}readU16(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,e.getUint16(t,!1)}readU24(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let s=e.getUint16(t,!1),i=e.getUint8(t+2);return s*256+i}readS32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getUint32(t,!1)}readI32(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,e.getInt32(t,!1)}readU64(){let e=this.readU32(),t=this.readU32();return e*4294967296+t}readF64(){let{view:e,offset:t}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,e.getFloat64(t,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(e){let{view:t,offset:s}=this.reader.getViewAndOffset(this.pos,this.pos+e);this.pos+=e;let i="";for(let a=0;ae.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let t=await Promise.all(this.tracks.map(i=>i.inputTrack.getCodecMimeType())),s=[...new Set(t)];e+=`; codecs="${s.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&ss.presentationTimestamp-i.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let t=this.isobmffReader.readBoxHeader();m(t.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+t.totalSize),this.isobmffReader.pos=e,this.traverseBox();let s=z(this.fragments,e,a=>a.moofOffset);m(s!==-1);let i=this.fragments[s];m(i.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+t.totalSize);for(let[a,n]of i.trackData){if(n.startTimestampIsFinal)continue;let c=this.tracks.find(l=>l.id===a);this.isobmffReader.pos=0;let o=null,u=null,d=I(c.fragments,e-1,l=>l.moofOffset);for(d!==-1&&(o=c.fragments[d],u=o,this.isobmffReader.pos=o.moofOffset+o.moofSize);this.isobmffReader.posb.moofOffset);if(h===-1){this.isobmffReader.pos=l;let b=await this.readFragment();o&&(o.nextFragment=b),o=b}else{let b=this.fragments[h];o&&(o.nextFragment=b),o=b}}this.isobmffReader.pos=l+g.totalSize}o&&o.trackData.has(a)&&(u=o)}if(u){let l=u.trackData.get(a);m(l.startTimestampIsFinal),sr(n,l.endTimestamp)}n.startTimestampIsFinal=!0}return i}readContiguousBoxes(e){let t=this.isobmffReader.pos;for(;this.isobmffReader.pos-td.every((l,g)=>l===o[g]));u===-1?i.rotation=0:i.rotation=90*u}break;case"mdhd":{let i=this.currentTrack;m(i);let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3,a===0?(this.isobmffReader.pos+=8,i.timescale=this.isobmffReader.readU32(),i.durationInTimescale=this.isobmffReader.readU32()):a===1&&(this.isobmffReader.pos+=16,i.timescale=this.isobmffReader.readU32(),i.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let i=this.currentTrack;m(i),this.isobmffReader.pos+=8;let a=this.isobmffReader.readAscii(4);a==="vide"?i.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:a==="soun"&&(i.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let i=this.currentTrack;m(i),i.sampleTableOffset=e,this.readContiguousBoxes(t.contentSize)}break;case"stsd":{let i=this.currentTrack;if(m(i),i.info===null||i.sampleTable)break;let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let n=this.isobmffReader.readU32();for(let c=0;c0){if(u===1)this.isobmffReader.pos+=4*4;else if(u===2){this.isobmffReader.pos+=4,l=this.isobmffReader.readF64(),d=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),h=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),p=this.isobmffReader.readU32()}}i.info.numberOfChannels=d,i.info.sampleRate=l,this.readContiguousBoxes(e+o.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let i=this.currentTrack;m(i&&i.info),i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"hvcC":{let i=this.currentTrack;m(i&&i.info),i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+t.contentSize)}break;case"colr":{let i=this.currentTrack;if(m(i&&i.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let n=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),o=this.isobmffReader.readU16(),u=!!(this.isobmffReader.readU8()&128);i.info.colorSpace={primaries:It[n],transfer:_t[c],matrix:Rt[o],fullRange:u}}break;case"wave":t.totalSize>8&&this.readContiguousBoxes(t.contentSize);break;case"esds":{let i=this.currentTrack;m(i&&i.info),this.isobmffReader.pos+=4;let a=this.isobmffReader.readU8();m(a===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let n=this.isobmffReader.readU8(),c=(n&128)!==0,o=(n&64)!==0,u=(n&32)!==0;if(c&&(this.isobmffReader.pos+=2),o){let b=this.isobmffReader.readU8();this.isobmffReader.pos+=b}u&&(this.isobmffReader.pos+=2);let d=this.isobmffReader.readU8();m(d===4),this.isobmffReader.readIsomVariableInteger();let l=this.isobmffReader.readU8();m(l===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();m(g===5);let h=this.isobmffReader.readIsomVariableInteger();i.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+h)}break;case"stts":{let i=this.currentTrack;if(m(i),!i.sampleTable)break;this.isobmffReader.pos+=4;let a=this.isobmffReader.readU32(),n=0,c=0;for(let o=0;ow.id===a);if(!n)break;n.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),o=(c&48)>>4,u=(c&12)>>2,d=c&3,l=this.isobmffReader,g=[l.readU8.bind(l),l.readU16.bind(l),l.readU24.bind(l),l.readU32.bind(l)],h=g[o],b=g[u],p=g[d],x=this.isobmffReader.readU32();for(let w=0;wa.moofOffset);this.fragments.splice(i+1,0,this.currentFragment);for(let[,a]of this.currentFragment.trackData){let n=a.samples[0],c=_(a.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,n.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(m(this.currentFragment),this.readContiguousBoxes(t.contentSize),this.currentTrack){let i=this.currentFragment.trackData.get(this.currentTrack.id);if(i){let a=I(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(a+1,0,this.currentFragment);let{currentFragmentState:n}=this.currentTrack;m(n),n.startTimestamp!==null&&(sr(i,n.startTimestamp),i.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{m(this.currentFragment),this.isobmffReader.pos+=1;let i=this.isobmffReader.readU24(),a=!!(i&1),n=!!(i&2),c=!!(i&8),o=!!(i&16),u=!!(i&32),d=!!(i&65536),l=!!(i&131072),g=this.isobmffReader.readU32(),h=this.tracks.find(p=>p.id===g);if(!h)break;let b=this.fragmentTrackDefaults.find(p=>p.trackId===g);this.currentTrack=h,h.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:b?.defaultSampleDescriptionIndex??null,defaultSampleDuration:b?.defaultSampleDuration??null,defaultSampleSize:b?.defaultSampleSize??null,defaultSampleFlags:b?.defaultSampleFlags??null,startTimestamp:null},a?h.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():l&&(h.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),n&&(h.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(h.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),o&&(h.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),u&&(h.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),d&&(h.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let i=this.currentTrack;if(!i)break;m(i.currentFragmentState);let a=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let n=a===0?this.isobmffReader.readU32():this.isobmffReader.readU64();i.currentFragmentState.startTimestamp=n}break;case"trun":{let i=this.currentTrack;if(!i)break;if(m(this.currentFragment),m(i.currentFragmentState),this.currentFragment.trackData.has(i.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let a=this.isobmffReader.readU8(),n=this.isobmffReader.readU24(),c=!!(n&1),o=!!(n&4),u=!!(n&256),d=!!(n&512),l=!!(n&1024),g=!!(n&2048),h=this.isobmffReader.readU32(),b=i.currentFragmentState.baseDataOffset;c&&(b+=this.isobmffReader.readI32());let p=null;o&&(p=this.isobmffReader.readU32());let x=b;if(h===0){this.currentFragment.implicitBaseDataOffset=x;break}let w=0,y={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(i.id,y);for(let V=0;V({presentationTimestamp:V.presentationTimestamp,sampleIndex:A})).sort((V,A)=>V.presentationTimestamp-A.presentationTimestamp);let N=y.samples[y.presentationTimestamps[0].sampleIndex],Z=y.samples[_(y.presentationTimestamps).sampleIndex];y.startTimestamp=N.presentationTimestamp,y.endTimestamp=Z.presentationTimestamp+Z.duration,this.currentFragment.implicitBaseDataOffset=x}break}this.isobmffReader.pos=s}},We=class{constructor(e){this.internalTrack=e}chunkToSampleIndex=new WeakMap;sampleIndexToChunk=new Map;chunkToFragmentLocation=new WeakMap;fragmentLocationToChunk=new Map;getCodec(){throw new Error("Not implemented on base class.")}async getDuration(){return this.internalTrack.durationInTimescale/this.internalTrack.timescale}},kt=class extends We{internalTrack;constructor(e){super(e),this.internalTrack=e}async getCodec(){return this.internalTrack.info.codec}async getWidth(){return this.internalTrack.info.width}async getHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:qt(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}async getFirstChunk(){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0):this.fetchChunkForSampleIndex(0)}async getChunk(e){let t=e*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(t),t,t);{let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=ir(s,t);return this.fetchChunkForSampleIndex(i)}}async getNextChunk(e){if(this.internalTrack.demuxer.isFragmented){let s=this.chunkToFragmentLocation.get(e);if(s===void 0)throw new Error("Chunk was not created from this track.");let i=s.fragment.trackData.get(this.internalTrack.id),a=i.samples[s.sampleIndex],n=z(this.internalTrack.fragments,s.fragment.moofOffset,c=>c.moofOffset);return m(n!==-1),this.performFragmentedLookup(()=>{if(s.sampleIndex+1d.moofOffset);return m(u!==-1),{fragmentIndex:u,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:n,sampleIndex:-1,correctSampleFound:!1}}},a.presentationTimestamp,1/0)}let t=this.chunkToSampleIndex.get(e);if(t===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(t+1)}async getKeyChunk(e){let t=e*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(t),t,t);let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=ir(s,t),a=i===-1?-1:hi(s,i);return this.fetchChunkForSampleIndex(a)}async getNextKeyChunk(e){if(this.internalTrack.demuxer.isFragmented){let a=this.chunkToFragmentLocation.get(e);if(a===void 0)throw new Error("Chunk was not created from this track.");let n=a.fragment.trackData.get(this.internalTrack.id),c=n.samples[a.sampleIndex],o=z(this.internalTrack.fragments,a.fragment.moofOffset,u=>u.moofOffset);return m(o!==-1),this.performFragmentedLookup(()=>{let u=n.samples.findIndex((d,l)=>d.isKeyFrame&&l>a.sampleIndex);if(u!==-1)return{fragmentIndex:o,sampleIndex:u,correctSampleFound:!0};{let d=a.fragment;for(;d.nextFragment;){d=d.nextFragment;let l=d.trackData.get(this.internalTrack.id);if(l){let g=z(this.internalTrack.fragments,d.moofOffset,b=>b.moofOffset);m(g!==-1);let h=l.samples.findIndex(b=>b.isKeyFrame);if(h===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:h,correctSampleFound:!0}}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0)}let t=this.chunkToSampleIndex.get(e);if(t===void 0)throw new Error("Chunk was not created from this track.");let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=bi(s,t);return this.fetchChunkForSampleIndex(i)}async fetchChunkForSampleIndex(e){if(e===-1)return null;let t=this.sampleIndexToChunk.get(e)?.deref();if(t)return t;let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),i=pi(s,e);if(!i)return null;await this.internalTrack.demuxer.chunkReader.reader.loadRange(i.chunkOffset,i.chunkOffset+i.chunkSize);let a=this.internalTrack.demuxer.chunkReader.readRange(i.sampleOffset,i.sampleOffset+i.sampleSize),n=new EncodedVideoChunk({data:a,timestamp:1e6*i.presentationTimestamp/this.internalTrack.timescale,duration:1e6*i.duration/this.internalTrack.timescale,type:i.isKeyFrame?"key":"delta"});return this.chunkToSampleIndex.set(n,e),this.sampleIndexToChunk.set(e,new WeakRef(n)),n}async fetchChunkInFragment(e,t){if(t===-1)return null;let s=`${e.moofOffset}:${t}`,i=this.fragmentLocationToChunk.get(s)?.deref();if(i)return i;let n=e.trackData.get(this.internalTrack.id).samples[t];m(n),await this.internalTrack.demuxer.chunkReader.reader.loadRange(e.dataStart,e.dataEnd);let c=this.internalTrack.demuxer.chunkReader.readRange(n.byteOffset,n.byteOffset+n.byteSize),o=new EncodedVideoChunk({data:c,timestamp:1e6*n.presentationTimestamp/this.internalTrack.timescale,duration:1e6*n.duration/this.internalTrack.timescale,type:n.isKeyFrame?"key":"delta"});return this.chunkToFragmentLocation.set(o,{fragment:e,sampleIndex:t}),this.fragmentLocationToChunk.set(s,new WeakRef(o)),o}findSampleInFragmentsForTimestamp(e){let t=I(this.internalTrack.fragments,e,a=>a.trackData.get(this.internalTrack.id).startTimestamp),s=-1,i=!1;if(t!==-1){let n=this.internalTrack.fragments[t].trackData.get(this.internalTrack.id),c=I(n.presentationTimestamps,e,o=>o.presentationTimestamp);m(c!==-1),s=n.presentationTimestamps[c].sampleIndex,i=ea.trackData.get(this.internalTrack.id).startTimestamp),s=-1,i=!1;if(t!==-1){let n=this.internalTrack.fragments[t].trackData.get(this.internalTrack.id),c=n.presentationTimestamps.findLastIndex(u=>n.samples[u.sampleIndex].isKeyFrame);if(c===-1)throw new Error("Not supported: Fragment does not contain key sample.");s=n.presentationTimestamps[c].sampleIndex,i=ex.timestamp);p!==-1&&(b=this.internalTrack.fragmentLookupTable[p])}if(i===-1)u.pos=b?.moofOffset??0;else{let p=this.internalTrack.fragments[i];!b||p.moofOffset>=p.moofOffset?(u.pos=p.moofOffset+p.moofSize,l=p):u.pos=b.moofOffset}for(;u.poss)break;if(l.nextFragment){u.pos=l.nextFragment.moofOffset+l.nextFragment.moofSize,l=l.nextFragment;continue}}await u.reader.loadRange(u.pos,u.pos+16);let p=u.pos,x=u.readBoxHeader();if(x.name==="moof"){let w=z(c.fragments,p,y=>y.moofOffset);if(w===-1){u.pos=p;let y=await c.readFragment();l&&(l.nextFragment=y),l=y;let{fragmentIndex:N,sampleIndex:Z,correctSampleFound:V}=e();if(V){let A=this.internalTrack.fragments[N];return this.fetchChunkInFragment(A,Z)}N!==-1&&(g=N,h=Z)}else{let y=c.fragments[w];l&&(l.nextFragment=y),l=y}}u.pos=p+x.totalSize}if(g!==-1){let p=this.internalTrack.fragments[g];return this.fetchChunkInFragment(p,h)}return null}finally{o()}}},Tt=class extends We{internalTrack;constructor(e){super(e),this.internalTrack=e}async getCodec(){return this.internalTrack.info.codec}async getNumberOfChannels(){return this.internalTrack.info.numberOfChannels}async getSampleRate(){return this.internalTrack.info.sampleRate}async getDecoderConfig(){return{codec:Gt(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),numberOfChannels:this.internalTrack.info.numberOfChannels,sampleRate:this.internalTrack.info.sampleRate,description:this.internalTrack.info.codecDescription??void 0}}},ir=(r,e)=>{let t=I(r.presentationTimestamps,e,s=>s.presentationTimestamp);return t===-1?-1:r.presentationTimestamps[t].sampleIndex},pi=(r,e)=>{let t=I(r.sampleTimingEntries,e,p=>p.startIndex),s=r.sampleTimingEntries[t];if(!s||s.startIndex+s.count<=e)return null;let a=s.startDecodeTimestamp+(e-s.startIndex)*s.delta,n=I(r.sampleCompositionTimeOffsets,e,p=>p.startIndex),c=r.sampleCompositionTimeOffsets[n];c&&(a+=c.offset);let o=r.sampleSizes[Math.min(e,r.sampleSizes.length-1)],u=I(r.sampleToChunk,e,p=>p.startSampleIndex),d=r.sampleToChunk[u];m(d);let l=d.startChunkIndex+Math.floor((e-d.startSampleIndex)/d.samplesPerChunk),g=r.chunkOffsets[l],h=0,b=g;if(r.sampleSizes.length===1)b+=o*(e-d.startSampleIndex),h+=o*d.samplesPerChunk;else{let p=d.startSampleIndex+(l-d.startChunkIndex)*d.samplesPerChunk;for(let x=p;xp)!==-1:!0}},hi=(r,e)=>{if(!r.keySampleIndices)return e;let t=I(r.keySampleIndices,e,s=>s);return r.keySampleIndices[t]??-1},bi=(r,e)=>{if(!r.keySampleIndices)return e+1;let t=I(r.keySampleIndices,e,s=>s);return r.keySampleIndices[t+1]??-1},sr=(r,e)=>{r.startTimestamp+=e,r.endTimestamp+=e;for(let t of r.samples)t.presentationTimestamp+=e;for(let t of r.presentationTimestamps)t.presentationTimestamp+=e};var He=class extends ce{};var Le=class{},xt=class extends Le{async _canReadInput(e){if(await e._mainReader.source._getSize()<8)return!1;let s=new Y(e._mainReader);return s.pos=4,s.readAscii(4)==="ftyp"}_createDemuxer(e){return new Ne(e)}},St=class extends Le{async _canReadInput(){return!1}_createDemuxer(e){return new He(e)}},$e=new xt,gi=$e,ki=$e,Ct=new St,ar=Ct,Ti=Ct,xi=[$e,ar];var wt=class{_source;_formats;_mainReader;_demuxerPromise=null;_format=null;constructor(e){this._formats=e.formats,this._source=e.source,this._mainReader=new ue(e.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{await this._mainReader.loadRange(0,4096);for(let e of this._formats)if(await e._canReadInput(this))return this._format=e,e._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),m(this._format),this._format}async getDuration(){return(await this._getDemuxer()).getDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(t=>t.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(t=>t.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(t=>t.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(t=>t.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var Qe=class{constructor(e){this.videoTrack=e}getFirstChunk(){return this.videoTrack._backing.getFirstChunk()}getChunk(e){return this.videoTrack._backing.getChunk(e)}getNextChunk(e){return this.videoTrack._backing.getNextChunk(e)}getKeyChunk(e){return this.videoTrack._backing.getKeyChunk(e)}getNextKeyChunk(e){return this.videoTrack._backing.getNextKeyChunk(e)}async*chunks(e,t=1/0){let s=[],{promise:i,resolve:a}=j(),{promise:n,resolve:c}=j(),o=!1,u=[],d=()=>Math.max(2,u.length);(async()=>{let l=e??await this.getFirstChunk();for(;l&&!o&&!(l.timestamp/1e6>=t);){if(s.length>d()){({promise:n,resolve:c}=j()),await n;continue}s.push(l),a(),{promise:i,resolve:a}=j(),l=await this.getNextChunk(l)}o=!0,a()})();try{for(;;)if(s.length>0){yield s.shift();let l=performance.now();for(u.push(l);u.length>0&&l-u[0]>=1e3;)u.shift();c()}else if(!o)await i;else break}finally{o=!0,c()}}},yt=class{constructor(e){this.videoTrack=e}decoderConfig=null;async createDecoder(e){this.decoderConfig||(this.decoderConfig=await this.videoTrack.getDecoderConfig());let t=new VideoDecoder({output:e,error:s=>console.error(s)});return t.configure(this.decoderConfig),t}async getKeyFrame(e){let t=null,s=await this.createDecoder(a=>t=a),i=await this.videoTrack._backing.getKeyChunk(e);return i?(s.decode(i),await s.flush(),s.close(),t):null}async getFrame(e){let t=null,s=await this.createDecoder(c=>{c.timestamp/1e6<=e?(t?.close(),t=c):c.close()}),i=await this.videoTrack._backing.getKeyChunk(e);if(!i)return null;let a=await this.videoTrack._backing.getChunk(e);m(a),s.decode(i);let n=i;for(;n!==a;){let c=await this.videoTrack._backing.getNextChunk(n);m(c),n=c,s.decode(c),s.decodeQueueSize>=10&&await new Promise(o=>s.addEventListener("dequeue",o,{once:!0}))}return await s.flush(),s.close(),t}async*frames(e=0,t=1/0){let s=[],i=!1,a=null,{promise:n,resolve:c}=j(),o=!1,u=await this.createDecoder(g=>{let h=g.timestamp/1e6;if(h>=t&&(o=!0),o){g.close();return}a&&(h>e?(s.push(a),i=!0):a.close()),h>=e&&(s.push(g),i=!0),a=i?null:g,s.length>0&&(c(),{promise:n,resolve:c}=j())}),d=await this.videoTrack._backing.getKeyChunk(e)??await this.videoTrack._backing.getFirstChunk();if(!d)return;let l=!1;(async()=>{let g=d,h=1/0;if(t<1/0){let x=await this.videoTrack._backing.getChunk(t),w=x?x.type==="key"&&x.timestamp/1e6===t?x:await this.videoTrack._backing.getNextKeyChunk(x):null;w&&(h=w.timestamp/1e6)}let p=new Qe(this.videoTrack).chunks(d,h);for(await p.next();g&&!o;){u.decode(g),u.decodeQueueSize>=10&&await new Promise(w=>u.addEventListener("dequeue",w,{once:!0}));let x=await p.next();if(x.done)break;g=x.value}await p.return(),await u.flush(),u.close(),!i&&a&&s.push(a),l=!0,c()})();try{for(;;)if(s.length>0)yield s.shift();else if(!l)await n;else break}finally{o=!0}}};export{xi as ALL_FORMATS,ie as AUDIO_CODECS,bt as ArrayBufferSource,pe as ArrayBufferTarget,lt as AudioBufferSource,dt as AudioDataSource,D as AudioSource,gt as BlobSource,ct as CanvasSource,mt as EncodedAudioChunkSource,Qe as EncodedVideoChunkDrain,nt as EncodedVideoChunkSource,$e as ISOBMFF,wt as Input,Ct as MATROSKA,ar as MKV,ki as MOV,gi as MP4,ne as MediaSource,ft as MediaStreamAudioTrackSource,ut as MediaStreamVideoTrackSource,Ue as MkvOutputFormat,at as Mp4OutputFormat,ht as Output,G as OutputFormat,Ve as SUBTITLE_CODECS,Te as Source,tt as StreamTarget,oe as SubtitleSource,X as Target,pt as TextSubtitleSource,re as VIDEO_CODECS,yt as VideoFrameDrain,ot as VideoFrameSource,P as VideoSource,Ti as WEBM,ae as WebMOutputFormat}; diff --git a/dist/metamuxer.mjs b/dist/metamuxer.mjs index 3c08662..200e194 100644 --- a/dist/metamuxer.mjs +++ b/dist/metamuxer.mjs @@ -1075,8 +1075,8 @@ var tfra = (trackData, trackIndex) => { u32(trackData.finalizedChunks.length), // Number of entries trackData.finalizedChunks.map((chunk) => [ - u64(intoTimescale(chunk.startTimestamp, trackData.timescale)), - // Time + u64(intoTimescale(chunk.samples[0].timestamp, trackData.timescale)), + // Time (in presentation time) u64(chunk.moofOffset), // moof offset u32(trackIndex + 1), @@ -2405,14 +2405,14 @@ var IsobmffMuxer = class extends Muxer { const movieBox = moov(this.trackDatas, this.creationTime, true); this.boxWriter.writeBox(movieBox); } + const tracksInFragment = this.trackDatas.filter((x) => x.currentChunk); const moofOffset = this.writer.getPos(); - const moofBox = moof(fragmentNumber, this.trackDatas); + const moofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(moofBox); { const mdatBox = mdat(false); let totalTrackSampleSize = 0; - for (const trackData of this.trackDatas) { - assert(trackData.currentChunk); + for (const trackData of tracksInFragment) { for (const sample of trackData.currentChunk.samples) { totalTrackSampleSize += sample.size; } @@ -2425,7 +2425,7 @@ var IsobmffMuxer = class extends Muxer { mdatBox.size = mdatSize; this.boxWriter.writeBox(mdatBox); } - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.currentChunk.offset = this.writer.getPos(); trackData.currentChunk.moofOffset = moofOffset; for (const sample of trackData.currentChunk.samples) { @@ -2435,10 +2435,10 @@ var IsobmffMuxer = class extends Muxer { } const endPos = this.writer.getPos(); this.writer.seek(this.boxWriter.offsets.get(moofBox)); - const newMoofBox = moof(fragmentNumber, this.trackDatas); + const newMoofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(newMoofBox); this.writer.seek(endPos); - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.finalizedChunks.push(trackData.currentChunk); this.finalizedChunks.push(trackData.currentChunk); trackData.currentChunk = null; @@ -4084,7 +4084,6 @@ var InputAudioTrack = class extends InputTrack { }; // src/reader.ts -var PAGE_SIZE = 4096; var Reader = class { constructor(source, maxStorableBytes = Infinity) { this.source = source; @@ -4096,24 +4095,22 @@ var Reader = class { nextAge = 0; totalStoredBytes = 0; async loadRange(start, end) { - const alignedStart = Math.floor(start / PAGE_SIZE) * PAGE_SIZE; - let alignedEnd = Math.ceil(end / PAGE_SIZE) * PAGE_SIZE; - alignedEnd = Math.min(alignedEnd, await this.source._getSize()); - const matchingLoadingSegment = this.loadingSegments.find((x) => x.start <= alignedStart && x.end >= alignedEnd); + end = Math.min(end, await this.source._getSize()); + const matchingLoadingSegment = this.loadingSegments.find((x) => x.start <= start && x.end >= end); if (matchingLoadingSegment) { await matchingLoadingSegment.promise; return; } - const encasingSegmentExists = this.loadedSegments.some((x) => x.start <= alignedStart && x.end >= alignedEnd); + const encasingSegmentExists = this.loadedSegments.some((x) => x.start <= start && x.end >= end); if (encasingSegmentExists) { return; } - const bytesPromise = this.source._read(alignedStart, alignedEnd); - const loadingSegment = { start: alignedStart, end: alignedEnd, promise: bytesPromise }; + const bytesPromise = this.source._read(start, end); + const loadingSegment = { start, end, promise: bytesPromise }; this.loadingSegments.push(loadingSegment); const bytes2 = await bytesPromise; removeItem(this.loadingSegments, loadingSegment); - this.insertIntoLoadedSegments(alignedStart, bytes2); + this.insertIntoLoadedSegments(start, bytes2); } insertIntoLoadedSegments(start, bytes2) { const segment = { @@ -4178,6 +4175,21 @@ var Reader = class { offset: segment.bytes.byteOffset + start - segment.start }; } + forgetRange(start, end) { + if (end <= start) { + return; + } + const startIndex = binarySearchLessOrEqual(this.loadedSegments, start, (x) => x.start); + if (startIndex === -1) { + return; + } + const segment = this.loadedSegments[startIndex]; + if (segment.start !== start || segment.end !== end) { + return; + } + this.loadedSegments.splice(startIndex, 1); + this.totalStoredBytes -= segment.bytes.byteLength; + } }; // src/isobmff/isobmff-reader.ts @@ -4281,6 +4293,11 @@ var IsobmffDemuxer = class extends Demuxer { metadataPromise = null; movieTimescale = -1; movieDurationInTimescale = -1; + isFragmented = false; + fragmentTrackDefaults = []; + fragments = []; + currentFragment = null; + fragmentLookupMutex = new AsyncMutex(); chunkReader; constructor(input) { super(input); @@ -4321,10 +4338,24 @@ var IsobmffDemuxer = class extends Demuxer { this.isobmffReader.pos + boxInfo.contentSize ); this.readContiguousBoxes(boxInfo.contentSize); - return; + break; } this.isobmffReader.pos = startPos + boxInfo.totalSize; } + if (this.isFragmented) { + await this.isobmffReader.reader.loadRange(sourceSize - 4, sourceSize); + this.isobmffReader.pos = sourceSize - 4; + const lastWord = this.isobmffReader.readU32(); + const potentialMfraPos = sourceSize - lastWord; + if (potentialMfraPos >= 0 && potentialMfraPos < sourceSize) { + await this.isobmffReader.reader.loadRange(potentialMfraPos, sourceSize); + this.isobmffReader.pos = potentialMfraPos; + const boxInfo = this.isobmffReader.readBoxHeader(); + if (boxInfo.name === "mfra") { + this.readContiguousBoxes(boxInfo.contentSize); + } + } + } })(); } getSampleTableForTrack(internalTrack) { @@ -4366,6 +4397,73 @@ var IsobmffDemuxer = class extends Demuxer { sampleTable.presentationTimestamps.sort((a, b) => a.presentationTimestamp - b.presentationTimestamp); return internalTrack.sampleTable; } + async readFragment() { + const startPos = this.isobmffReader.pos; + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + const moofBoxInfo = this.isobmffReader.readBoxHeader(); + assert(moofBoxInfo.name === "moof"); + await this.isobmffReader.reader.loadRange(startPos, startPos + moofBoxInfo.totalSize); + this.isobmffReader.pos = startPos; + this.traverseBox(); + const index = binarySearchExact(this.fragments, startPos, (x) => x.moofOffset); + assert(index !== -1); + const fragment = this.fragments[index]; + assert(fragment.moofOffset === startPos); + this.isobmffReader.reader.forgetRange(startPos, startPos + moofBoxInfo.totalSize); + for (const [trackId, trackData] of fragment.trackData) { + if (trackData.startTimestampIsFinal) { + continue; + } + const internalTrack = this.tracks.find((x) => x.id === trackId); + this.isobmffReader.pos = 0; + let currentFragment = null; + let lastFragment = null; + const index2 = binarySearchLessOrEqual( + internalTrack.fragments, + startPos - 1, + (x) => x.moofOffset + ); + if (index2 !== -1) { + currentFragment = internalTrack.fragments[index2]; + lastFragment = currentFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } + while (this.isobmffReader.pos < startPos) { + if (currentFragment?.nextFragment) { + currentFragment = currentFragment.nextFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } else { + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + const startPos2 = this.isobmffReader.pos; + const boxInfo = this.isobmffReader.readBoxHeader(); + if (boxInfo.name === "moof") { + const index3 = binarySearchExact(this.fragments, startPos2, (x) => x.moofOffset); + if (index3 === -1) { + this.isobmffReader.pos = startPos2; + const fragment2 = await this.readFragment(); + if (currentFragment) currentFragment.nextFragment = fragment2; + currentFragment = fragment2; + } else { + const fragment2 = this.fragments[index3]; + if (currentFragment) currentFragment.nextFragment = fragment2; + currentFragment = fragment2; + } + } + this.isobmffReader.pos = startPos2 + boxInfo.totalSize; + } + if (currentFragment && currentFragment.trackData.has(trackId)) { + lastFragment = currentFragment; + } + } + if (lastFragment) { + const otherTrackData = lastFragment.trackData.get(trackId); + assert(otherTrackData.startTimestampIsFinal); + offsetFragmentTrackDataByTimestamp(trackData, otherTrackData.endTimestamp); + } + trackData.startTimestampIsFinal = true; + } + return fragment; + } readContiguousBoxes(totalSize) { const startIndex = this.isobmffReader.pos; while (this.isobmffReader.pos - startIndex < totalSize) { @@ -4380,6 +4478,7 @@ var IsobmffDemuxer = class extends Demuxer { case "mdia": case "minf": case "dinf": + case "mfra": { this.readContiguousBoxes(boxInfo.contentSize); } @@ -4412,7 +4511,10 @@ var IsobmffDemuxer = class extends Demuxer { durationInTimescale: -1, rotation: 0, sampleTableOffset: -1, - sampleTable: null + sampleTable: null, + fragmentLookupTable: null, + currentFragmentState: null, + fragments: [] }; this.currentTrack = track; this.readContiguousBoxes(boxInfo.contentSize); @@ -4829,6 +4931,293 @@ var IsobmffDemuxer = class extends Demuxer { } ; break; + case "mvex": + { + this.isFragmented = true; + this.readContiguousBoxes(boxInfo.contentSize); + } + ; + break; + case "mehd": + { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const fragmentDuration = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + this.movieDurationInTimescale = fragmentDuration; + } + ; + break; + case "trex": + { + this.isobmffReader.pos += 4; + const trackId = this.isobmffReader.readU32(); + const defaultSampleDescriptionIndex = this.isobmffReader.readU32(); + const defaultSampleDuration = this.isobmffReader.readU32(); + const defaultSampleSize = this.isobmffReader.readU32(); + const defaultSampleFlags = this.isobmffReader.readU32(); + this.fragmentTrackDefaults.push({ + trackId, + defaultSampleDescriptionIndex, + defaultSampleDuration, + defaultSampleSize, + defaultSampleFlags + }); + } + ; + break; + case "tfra": + { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find((x2) => x2.id === trackId); + if (!track) { + break; + } + track.fragmentLookupTable = []; + const word = this.isobmffReader.readU32(); + const lengthSizeOfTrafNum = (word & 48) >> 4; + const lengthSizeOfTrunNum = (word & 12) >> 2; + const lengthSizeOfSampleNum = word & 3; + const x = this.isobmffReader; + const functions = [x.readU8.bind(x), x.readU16.bind(x), x.readU24.bind(x), x.readU32.bind(x)]; + const readTrafNum = functions[lengthSizeOfTrafNum]; + const readTrunNum = functions[lengthSizeOfTrunNum]; + const readSampleNum = functions[lengthSizeOfSampleNum]; + const numberOfEntries = this.isobmffReader.readU32(); + for (let i = 0; i < numberOfEntries; i++) { + const time = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + const moofOffset = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + const trafNumber = readTrafNum(); + const trunNumber = readTrunNum(); + const sampleNumber = readSampleNum(); + track.fragmentLookupTable.push({ + timestamp: time, + moofOffset + }); + } + } + ; + break; + case "moof": + { + this.currentFragment = { + moofOffset: startPos, + moofSize: boxInfo.totalSize, + implicitBaseDataOffset: startPos, + trackData: /* @__PURE__ */ new Map(), + dataStart: Infinity, + dataEnd: 0, + nextFragment: null + }; + this.readContiguousBoxes(boxInfo.contentSize); + const insertionIndex = binarySearchLessOrEqual( + this.fragments, + this.currentFragment.moofOffset, + (x) => x.moofOffset + ); + this.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + for (const [, trackData] of this.currentFragment.trackData) { + const firstSample = trackData.samples[0]; + const lastSample = last(trackData.samples); + this.currentFragment.dataStart = Math.min( + this.currentFragment.dataStart, + firstSample.byteOffset + ); + this.currentFragment.dataEnd = Math.max( + this.currentFragment.dataEnd, + lastSample.byteOffset + lastSample.byteSize + ); + } + this.currentFragment = null; + } + ; + break; + case "traf": + { + assert(this.currentFragment); + this.readContiguousBoxes(boxInfo.contentSize); + if (this.currentTrack) { + const trackData = this.currentFragment.trackData.get(this.currentTrack.id); + if (trackData) { + const insertionIndex = binarySearchLessOrEqual( + this.currentTrack.fragments, + this.currentFragment.moofOffset, + (x) => x.moofOffset + ); + this.currentTrack.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + const { currentFragmentState } = this.currentTrack; + assert(currentFragmentState); + if (currentFragmentState.startTimestamp !== null) { + offsetFragmentTrackDataByTimestamp(trackData, currentFragmentState.startTimestamp); + trackData.startTimestampIsFinal = true; + } + } + this.currentTrack.currentFragmentState = null; + this.currentTrack = null; + } + } + ; + break; + case "tfhd": + { + assert(this.currentFragment); + this.isobmffReader.pos += 1; + const flags = this.isobmffReader.readU24(); + const baseDataOffsetPresent = Boolean(flags & 1); + const sampleDescriptionIndexPresent = Boolean(flags & 2); + const defaultSampleDurationPresent = Boolean(flags & 8); + const defaultSampleSizePresent = Boolean(flags & 16); + const defaultSampleFlagsPresent = Boolean(flags & 32); + const durationIsEmpty = Boolean(flags & 65536); + const defaultBaseIsMoof = Boolean(flags & 131072); + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find((x) => x.id === trackId); + if (!track) { + break; + } + const defaults = this.fragmentTrackDefaults.find((x) => x.trackId === trackId); + this.currentTrack = track; + track.currentFragmentState = { + baseDataOffset: this.currentFragment.implicitBaseDataOffset, + sampleDescriptionIndex: defaults?.defaultSampleDescriptionIndex ?? null, + defaultSampleDuration: defaults?.defaultSampleDuration ?? null, + defaultSampleSize: defaults?.defaultSampleSize ?? null, + defaultSampleFlags: defaults?.defaultSampleFlags ?? null, + startTimestamp: null + }; + if (baseDataOffsetPresent) { + track.currentFragmentState.baseDataOffset = this.isobmffReader.readU64(); + } else if (defaultBaseIsMoof) { + track.currentFragmentState.baseDataOffset = this.currentFragment.moofOffset; + } + if (sampleDescriptionIndexPresent) { + track.currentFragmentState.sampleDescriptionIndex = this.isobmffReader.readU32(); + } + if (defaultSampleDurationPresent) { + track.currentFragmentState.defaultSampleDuration = this.isobmffReader.readU32(); + } + if (defaultSampleSizePresent) { + track.currentFragmentState.defaultSampleSize = this.isobmffReader.readU32(); + } + if (defaultSampleFlagsPresent) { + track.currentFragmentState.defaultSampleFlags = this.isobmffReader.readU32(); + } + if (durationIsEmpty) { + track.currentFragmentState.defaultSampleDuration = 0; + } + } + ; + break; + case "tfdt": + { + const track = this.currentTrack; + if (!track) { + break; + } + assert(track.currentFragmentState); + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; + const baseMediaDecodeTime = version === 0 ? this.isobmffReader.readU32() : this.isobmffReader.readU64(); + track.currentFragmentState.startTimestamp = baseMediaDecodeTime; + } + ; + break; + case "trun": + { + const track = this.currentTrack; + if (!track) { + break; + } + assert(this.currentFragment); + assert(track.currentFragmentState); + if (this.currentFragment.trackData.has(track.id)) { + throw new Error("Can't have two trun boxes for the same track in one fragment."); + } + const version = this.isobmffReader.readU8(); + const flags = this.isobmffReader.readU24(); + const dataOffsetPresent = Boolean(flags & 1); + const firstSampleFlagsPresent = Boolean(flags & 4); + const sampleDurationPresent = Boolean(flags & 256); + const sampleSizePresent = Boolean(flags & 512); + const sampleFlagsPresent = Boolean(flags & 1024); + const sampleCompositionTimeOffsetsPresent = Boolean(flags & 2048); + const sampleCount = this.isobmffReader.readU32(); + let dataOffset = track.currentFragmentState.baseDataOffset; + if (dataOffsetPresent) { + dataOffset += this.isobmffReader.readI32(); + } + let firstSampleFlags = null; + if (firstSampleFlagsPresent) { + firstSampleFlags = this.isobmffReader.readU32(); + } + let currentOffset = dataOffset; + if (sampleCount === 0) { + this.currentFragment.implicitBaseDataOffset = currentOffset; + break; + } + let currentTimestamp = 0; + const trackData = { + startTimestamp: 0, + endTimestamp: 0, + samples: [], + presentationTimestamps: [], + startTimestampIsFinal: false + }; + this.currentFragment.trackData.set(track.id, trackData); + for (let i = 0; i < sampleCount; i++) { + let sampleDuration; + if (sampleDurationPresent) { + sampleDuration = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleDuration !== null); + sampleDuration = track.currentFragmentState.defaultSampleDuration; + } + let sampleSize; + if (sampleSizePresent) { + sampleSize = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleSize !== null); + sampleSize = track.currentFragmentState.defaultSampleSize; + } + let sampleFlags; + if (sampleFlagsPresent) { + sampleFlags = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleFlags !== null); + sampleFlags = track.currentFragmentState.defaultSampleFlags; + } + if (i === 0 && firstSampleFlags !== null) { + sampleFlags = firstSampleFlags; + } + let sampleCompositionTimeOffset = 0; + if (sampleCompositionTimeOffsetsPresent) { + if (version === 0) { + sampleCompositionTimeOffset = this.isobmffReader.readU32(); + } else { + sampleCompositionTimeOffset = this.isobmffReader.readI32(); + } + } + const isKeyFrame = !(sampleFlags & 65536); + trackData.samples.push({ + presentationTimestamp: currentTimestamp + sampleCompositionTimeOffset, + duration: sampleDuration, + byteOffset: currentOffset, + byteSize: sampleSize, + isKeyFrame + }); + currentOffset += sampleSize; + currentTimestamp += sampleDuration; + } + trackData.presentationTimestamps = trackData.samples.map((x, i) => ({ presentationTimestamp: x.presentationTimestamp, sampleIndex: i })).sort((a, b) => a.presentationTimestamp - b.presentationTimestamp); + const firstSample = trackData.samples[trackData.presentationTimestamps[0].sampleIndex]; + const lastSample = trackData.samples[last(trackData.presentationTimestamps).sampleIndex]; + trackData.startTimestamp = firstSample.presentationTimestamp; + trackData.endTimestamp = lastSample.presentationTimestamp + lastSample.duration; + this.currentFragment.implicitBaseDataOffset = currentOffset; + } + ; + break; } this.isobmffReader.pos = boxEndPos; } @@ -4839,6 +5228,8 @@ var IsobmffTrackBacking = class { } chunkToSampleIndex = /* @__PURE__ */ new WeakMap(); sampleIndexToChunk = /* @__PURE__ */ new Map(); + chunkToFragmentLocation = /* @__PURE__ */ new WeakMap(); + fragmentLocationToChunk = /* @__PURE__ */ new Map(); getCodec() { throw new Error("Not implemented on base class."); } @@ -4873,6 +5264,176 @@ var IsobmffVideoTrackBacking = class extends IsobmffTrackBacking { colorSpace: this.internalTrack.info.colorSpace ?? void 0 }; } + async getFirstChunk() { + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => { + const fragment = this.internalTrack.fragments[0]; + return { + fragmentIndex: fragment ? 0 : -1, + sampleIndex: fragment ? 0 : -1, + correctSampleFound: !!fragment + }; + }, + 0, + Infinity + ); + } + return this.fetchChunkForSampleIndex(0); + } + async getChunk(timestamp) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findSampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale + ); + } else { + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + return this.fetchChunkForSampleIndex(sampleIndex); + } + } + async getNextChunk(chunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === void 0) { + throw new Error("Chunk was not created from this track."); + } + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[locationInFragment.sampleIndex]; + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex !== -1); + return this.performFragmentedLookup( + () => { + if (locationInFragment.sampleIndex + 1 < trackData.samples.length) { + return { + fragmentIndex, + sampleIndex: locationInFragment.sampleIndex + 1, + correctSampleFound: true + }; + } else { + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + const trackData2 = currentFragment.trackData.get(this.internalTrack.id); + if (trackData2) { + const fragmentIndex2 = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex2 !== -1); + return { + fragmentIndex: fragmentIndex2, + sampleIndex: 0, + correctSampleFound: true + }; + } + } + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false + }; + } + }, + sample.presentationTimestamp, + Infinity + ); + } + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === void 0) { + throw new Error("Chunk was not created from this track."); + } + return this.fetchChunkForSampleIndex(sampleIndex + 1); + } + async getKeyChunk(timestamp) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findKeySampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale + ); + } + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + const keyFrameSampleIndex = sampleIndex === -1 ? -1 : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + } + async getNextKeyChunk(chunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === void 0) { + throw new Error("Chunk was not created from this track."); + } + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[locationInFragment.sampleIndex]; + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex !== -1); + return this.performFragmentedLookup( + () => { + const nextKeyFrameIndex = trackData.samples.findIndex( + (x, i) => x.isKeyFrame && i > locationInFragment.sampleIndex + ); + if (nextKeyFrameIndex !== -1) { + return { + fragmentIndex, + sampleIndex: nextKeyFrameIndex, + correctSampleFound: true + }; + } else { + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + const trackData2 = currentFragment.trackData.get(this.internalTrack.id); + if (trackData2) { + const fragmentIndex2 = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + (x) => x.moofOffset + ); + assert(fragmentIndex2 !== -1); + const keyFrameIndex = trackData2.samples.findIndex((x) => x.isKeyFrame); + if (keyFrameIndex === -1) { + throw new Error("Not supported: Fragment does not contain key sample."); + } + return { + fragmentIndex: fragmentIndex2, + sampleIndex: keyFrameIndex, + correctSampleFound: true + }; + } + } + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false + }; + } + }, + sample.presentationTimestamp, + Infinity + ); + } + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === void 0) { + throw new Error("Chunk was not created from this track."); + } + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); + } async fetchChunkForSampleIndex(sampleIndex) { if (sampleIndex === -1) { return null; @@ -4904,35 +5465,163 @@ var IsobmffVideoTrackBacking = class extends IsobmffTrackBacking { this.sampleIndexToChunk.set(sampleIndex, new WeakRef(chunk)); return chunk; } - async getFirstChunk() { - return this.fetchChunkForSampleIndex(0); - } - async getChunk(timestamp) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - return this.fetchChunkForSampleIndex(sampleIndex); - } - async getNextChunk(chunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === void 0) { - throw new Error("Chunk was not created from this track."); + async fetchChunkInFragment(fragment, sampleIndex) { + if (sampleIndex === -1) { + return null; } - return this.fetchChunkForSampleIndex(sampleIndex + 1); + const compositeKey = `${fragment.moofOffset}:${sampleIndex}`; + const existingChunk = this.fragmentLocationToChunk.get(compositeKey)?.deref(); + if (existingChunk) { + return existingChunk; + } + const trackData = fragment.trackData.get(this.internalTrack.id); + const sample = trackData.samples[sampleIndex]; + assert(sample); + await this.internalTrack.demuxer.chunkReader.reader.loadRange(fragment.dataStart, fragment.dataEnd); + const data = this.internalTrack.demuxer.chunkReader.readRange( + sample.byteOffset, + sample.byteOffset + sample.byteSize + ); + const chunk = new EncodedVideoChunk({ + data, + timestamp: 1e6 * sample.presentationTimestamp / this.internalTrack.timescale, + duration: 1e6 * sample.duration / this.internalTrack.timescale, + type: sample.isKeyFrame ? "key" : "delta" + }); + this.chunkToFragmentLocation.set(chunk, { fragment, sampleIndex }); + this.fragmentLocationToChunk.set(compositeKey, new WeakRef(chunk)); + return chunk; } - async getKeyChunk(timestamp) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - const keyFrameSampleIndex = sampleIndex === -1 ? -1 : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + findSampleInFragmentsForTimestamp(timestampInTimescale) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + (x) => x.trackData.get(this.internalTrack.id).startTimestamp + ); + let sampleIndex = -1; + let correctSampleFound = false; + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + const trackData = fragment.trackData.get(this.internalTrack.id); + const index = binarySearchLessOrEqual( + trackData.presentationTimestamps, + timestampInTimescale, + (x) => x.presentationTimestamp + ); + assert(index !== -1); + sampleIndex = trackData.presentationTimestamps[index].sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + return { fragmentIndex, sampleIndex, correctSampleFound }; } - async getNextKeyChunk(chunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === void 0) { - throw new Error("Chunk was not created from this track."); + findKeySampleInFragmentsForTimestamp(timestampInTimescale) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + (x) => x.trackData.get(this.internalTrack.id).startTimestamp + ); + let sampleIndex = -1; + let correctSampleFound = false; + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + const trackData = fragment.trackData.get(this.internalTrack.id); + const index = trackData.presentationTimestamps.findLastIndex((x) => { + const sample = trackData.samples[x.sampleIndex]; + return sample.isKeyFrame; + }); + if (index === -1) { + throw new Error("Not supported: Fragment does not contain key sample."); + } + const entry = trackData.presentationTimestamps[index]; + sampleIndex = entry.sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + return { fragmentIndex, sampleIndex, correctSampleFound }; + } + /** Looks for a sample in the fragments while trying to load as few fragments as possible to retrieve it. */ + async performFragmentedLookup(getBestMatch, earliestTimestamp, latestTimestamp) { + const { fragmentIndex, sampleIndex, correctSampleFound } = getBestMatch(); + if (correctSampleFound) { + const fragment = this.internalTrack.fragments[fragmentIndex]; + return this.fetchChunkInFragment(fragment, sampleIndex); + } + const demuxer = this.internalTrack.demuxer; + const release = await demuxer.fragmentLookupMutex.acquire(); + try { + const isobmffReader = demuxer.isobmffReader; + const sourceSize = await isobmffReader.reader.source._getSize(); + let prevFragment = null; + let bestFragmentIndex = fragmentIndex; + let bestSampleIndex = sampleIndex; + let lookupEntry = null; + if (this.internalTrack.fragmentLookupTable) { + const index = binarySearchLessOrEqual( + this.internalTrack.fragmentLookupTable, + earliestTimestamp, + (x) => x.timestamp + ); + if (index !== -1) { + lookupEntry = this.internalTrack.fragmentLookupTable[index]; + } + } + if (fragmentIndex === -1) { + isobmffReader.pos = lookupEntry?.moofOffset ?? 0; + } else { + const fragment = this.internalTrack.fragments[fragmentIndex]; + if (!lookupEntry || fragment.moofOffset >= fragment.moofOffset) { + isobmffReader.pos = fragment.moofOffset + fragment.moofSize; + prevFragment = fragment; + } else { + isobmffReader.pos = lookupEntry.moofOffset; + } + } + while (isobmffReader.pos < sourceSize) { + if (prevFragment) { + const trackData = prevFragment.trackData.get(this.internalTrack.id); + if (trackData && trackData.startTimestamp > latestTimestamp) { + break; + } + if (prevFragment.nextFragment) { + isobmffReader.pos = prevFragment.nextFragment.moofOffset + prevFragment.nextFragment.moofSize; + prevFragment = prevFragment.nextFragment; + continue; + } + } + await isobmffReader.reader.loadRange(isobmffReader.pos, isobmffReader.pos + 16); + const startPos = isobmffReader.pos; + const boxInfo = isobmffReader.readBoxHeader(); + if (boxInfo.name === "moof") { + const index = binarySearchExact(demuxer.fragments, startPos, (x) => x.moofOffset); + if (index === -1) { + isobmffReader.pos = startPos; + const fragment = await demuxer.readFragment(); + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + const { fragmentIndex: fragmentIndex2, sampleIndex: sampleIndex2, correctSampleFound: correctSampleFound2 } = getBestMatch(); + if (correctSampleFound2) { + const fragment2 = this.internalTrack.fragments[fragmentIndex2]; + return this.fetchChunkInFragment(fragment2, sampleIndex2); + } + if (fragmentIndex2 !== -1) { + bestFragmentIndex = fragmentIndex2; + bestSampleIndex = sampleIndex2; + } + } else { + const fragment = demuxer.fragments[index]; + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + } + } + isobmffReader.pos = startPos + boxInfo.totalSize; + } + if (bestFragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[bestFragmentIndex]; + return this.fetchChunkInFragment(fragment, bestSampleIndex); + } + return null; + } finally { + release(); } - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); } }; var IsobmffAudioTrackBacking = class extends IsobmffTrackBacking { @@ -5032,6 +5721,16 @@ var getNextKeyframeIndexForSample = (sampleTable, sampleIndex) => { const index = binarySearchLessOrEqual(sampleTable.keySampleIndices, sampleIndex, (x) => x); return sampleTable.keySampleIndices[index + 1] ?? -1; }; +var offsetFragmentTrackDataByTimestamp = (trackData, timestamp) => { + trackData.startTimestamp += timestamp; + trackData.endTimestamp += timestamp; + for (const sample of trackData.samples) { + sample.presentationTimestamp += timestamp; + } + for (const entry of trackData.presentationTimestamps) { + entry.presentationTimestamp += timestamp; + } +}; // src/matroska/matroska-demuxer.ts var MatroskaDemuxer = class extends Demuxer { @@ -5047,7 +5746,6 @@ var IsobmffInputFormat = class extends InputFormat { if (sourceSize < 8) { return false; } - await input._mainReader.loadRange(4, 8); const isobmffReader = new IsobmffReader(input._mainReader); isobmffReader.pos = 4; const fourCc = isobmffReader.readAscii(4); @@ -5094,6 +5792,7 @@ var Input = class { /** @internal */ _getDemuxer() { return this._demuxerPromise ??= (async () => { + await this._mainReader.loadRange(0, 4096); for (const format of this._formats) { const canRead = await format._canReadInput(this); if (canRead) { diff --git a/src/index.ts b/src/index.ts index 694b19f..5d3e7b5 100644 --- a/src/index.ts +++ b/src/index.ts @@ -39,3 +39,5 @@ export { Source, ArrayBufferSource, BlobSource } from './source'; export { ALL_FORMATS, ISOBMFF, MP4, MOV, MATROSKA, MKV, WEBM } from './input-format'; export { Input, InputOptions } from './input'; export { EncodedVideoChunkDrain, VideoFrameDrain } from './media-drain'; + +// 🐡🦔 diff --git a/src/input-format.ts b/src/input-format.ts index ef32456..cd7f15f 100644 --- a/src/input-format.ts +++ b/src/input-format.ts @@ -20,8 +20,6 @@ class IsobmffInputFormat extends InputFormat { return false; } - await input._mainReader.loadRange(4, 8); - const isobmffReader = new IsobmffReader(input._mainReader); isobmffReader.pos = 4; const fourCc = isobmffReader.readAscii(4); diff --git a/src/input-track.ts b/src/input-track.ts index b28aa58..aa1ad0a 100644 --- a/src/input-track.ts +++ b/src/input-track.ts @@ -1,4 +1,5 @@ import { AudioCodec, MediaCodec, VideoCodec } from './codec'; +import { Rotation } from './misc'; export interface InputTrackBacking { getCodec(): Promise; @@ -34,7 +35,7 @@ export interface InputVideoTrackBacking extends InputTrackBacking { getCodec(): Promise; getWidth(): Promise; getHeight(): Promise; - getRotation(): Promise; + getRotation(): Promise; getDecoderConfig(): Promise; getFirstChunk(): Promise; getChunk(timestamp: number): Promise; diff --git a/src/input.ts b/src/input.ts index 9ab177c..3d48aa9 100644 --- a/src/input.ts +++ b/src/input.ts @@ -30,6 +30,8 @@ export class Input { /** @internal */ _getDemuxer() { return this._demuxerPromise ??= (async () => { + await this._mainReader.loadRange(0, 4096); // Load the first 4 kiB so we can determine the format + for (const format of this._formats) { const canRead = await format._canReadInput(this); if (canRead) { diff --git a/src/isobmff/isobmff-boxes.ts b/src/isobmff/isobmff-boxes.ts index b2523ec..3d0d087 100644 --- a/src/isobmff/isobmff-boxes.ts +++ b/src/isobmff/isobmff-boxes.ts @@ -989,7 +989,7 @@ export const tfra = (trackData: IsobmffTrackData, trackIndex: number) => { u32(0b111111), // This specifies that traf number, trun number and sample number are 32-bit ints u32(trackData.finalizedChunks.length), // Number of entries trackData.finalizedChunks.map(chunk => [ - u64(intoTimescale(chunk.startTimestamp, trackData.timescale)), // Time + u64(intoTimescale(chunk.samples[0]!.timestamp, trackData.timescale)), // Time (in presentation time) u64(chunk.moofOffset!), // moof offset u32(trackIndex + 1), // traf number u32(1), // trun number diff --git a/src/isobmff/isobmff-demuxer.ts b/src/isobmff/isobmff-demuxer.ts index ff194f5..fa6fdc9 100644 --- a/src/isobmff/isobmff-demuxer.ts +++ b/src/isobmff/isobmff-demuxer.ts @@ -17,6 +17,9 @@ import { rotationMatrix, binarySearchLessOrEqual, binarySearchExact, + Rotation, + last, + AsyncMutex, } from '../misc'; import { Reader } from '../reader'; import { IsobmffReader } from './isobmff-reader'; @@ -27,9 +30,12 @@ type InternalTrack = { inputTrack: InputTrack | null; timescale: number; durationInTimescale: number; - rotation: number; + rotation: Rotation; sampleTableOffset: number; sampleTable: SampleTable | null; + fragmentLookupTable: FragmentLookupTableEntry[] | null; + currentFragmentState: FragmentTrackState | null; + fragments: Fragment[]; } & ({ info: null; } | { @@ -84,15 +90,72 @@ type SampleToChunkEntry = { sampleDescriptionIndex: number; }; +type FragmentTrackDefaults = { + trackId: number; + defaultSampleDescriptionIndex: number; + defaultSampleDuration: number; + defaultSampleSize: number; + defaultSampleFlags: number; +}; + +type FragmentLookupTableEntry = { + timestamp: number; + moofOffset: number; +}; + +type FragmentTrackState = { + baseDataOffset: number; + sampleDescriptionIndex: number | null; + defaultSampleDuration: number | null; + defaultSampleSize: number | null; + defaultSampleFlags: number | null; + startTimestamp: number | null; +}; + +type FragmentTrackData = { + startTimestamp: number; + endTimestamp: number; + samples: FragmentTrackSample[]; + presentationTimestamps: { + presentationTimestamp: number; + sampleIndex: number; + }[]; + startTimestampIsFinal: boolean; +}; + +type FragmentTrackSample = { + presentationTimestamp: number; + duration: number; + byteOffset: number; + byteSize: number; + isKeyFrame: boolean; +}; + +type Fragment = { + moofOffset: number; + moofSize: number; + implicitBaseDataOffset: number; + trackData: Map; + dataStart: number; + dataEnd: number; + nextFragment: Fragment | null; +}; + const knownMatrixes = [rotationMatrix(0), rotationMatrix(90), rotationMatrix(180), rotationMatrix(270)]; export class IsobmffDemuxer extends Demuxer { - private isobmffReader: IsobmffReader; - private currentTrack: InternalTrack | null = null; - private tracks: InternalTrack[] = []; - private metadataPromise: Promise | null = null; - private movieTimescale = -1; - private movieDurationInTimescale = -1; + isobmffReader: IsobmffReader; + currentTrack: InternalTrack | null = null; + tracks: InternalTrack[] = []; + metadataPromise: Promise | null = null; + movieTimescale = -1; + movieDurationInTimescale = -1; + + isFragmented = false; + fragmentTrackDefaults: FragmentTrackDefaults[] = []; + fragments: Fragment[] = []; + currentFragment: Fragment | null = null; + fragmentLookupMutex = new AsyncMutex(); chunkReader: IsobmffReader; @@ -150,11 +213,32 @@ export class IsobmffDemuxer extends Demuxer { ); this.readContiguousBoxes(boxInfo.contentSize); - return; + break; } this.isobmffReader.pos = startPos + boxInfo.totalSize; } + + if (this.isFragmented) { + // The last 4 bytes may contain the size of the mfra box at the end of the file + await this.isobmffReader.reader.loadRange(sourceSize - 4, sourceSize); + + this.isobmffReader.pos = sourceSize - 4; + const lastWord = this.isobmffReader.readU32(); + const potentialMfraPos = sourceSize - lastWord; + + if (potentialMfraPos >= 0 && potentialMfraPos < sourceSize) { + await this.isobmffReader.reader.loadRange(potentialMfraPos, sourceSize); + + this.isobmffReader.pos = potentialMfraPos; + const boxInfo = this.isobmffReader.readBoxHeader(); + + if (boxInfo.name === 'mfra') { + // We found the mfra box, allowing for much better random access. Let's parse it: + this.readContiguousBoxes(boxInfo.contentSize); + } + } + } })(); } @@ -205,6 +289,100 @@ export class IsobmffDemuxer extends Demuxer { return internalTrack.sampleTable; } + async readFragment(): Promise { + const startPos = this.isobmffReader.pos; + + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + + const moofBoxInfo = this.isobmffReader.readBoxHeader(); + assert(moofBoxInfo.name === 'moof'); + + await this.isobmffReader.reader.loadRange(startPos, startPos + moofBoxInfo.totalSize); + + this.isobmffReader.pos = startPos; + this.traverseBox(); + + const index = binarySearchExact(this.fragments, startPos, x => x.moofOffset); + assert(index !== -1); + + const fragment = this.fragments[index]!; + assert(fragment.moofOffset === startPos); + + this.isobmffReader.reader.forgetRange(startPos, startPos + moofBoxInfo.totalSize); + + // It may be that some tracks don't define the base decode time, i.e. when the fragment begins. This means the + // only other option is to sum up the duration of all previous fragments. + for (const [trackId, trackData] of fragment.trackData) { + if (trackData.startTimestampIsFinal) { + continue; + } + + const internalTrack = this.tracks.find(x => x.id === trackId)!; + + this.isobmffReader.pos = 0; + let currentFragment: Fragment | null = null; + let lastFragment: Fragment | null = null; + + const index = binarySearchLessOrEqual( + internalTrack.fragments, + startPos - 1, + x => x.moofOffset, + ); + if (index !== -1) { + // Instead of starting at the start of the file, let's start at the previous fragment instead (which + // already has final timestamps). + currentFragment = internalTrack.fragments[index]!; + lastFragment = currentFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } + + while (this.isobmffReader.pos < startPos) { + if (currentFragment?.nextFragment) { + currentFragment = currentFragment.nextFragment; + this.isobmffReader.pos = currentFragment.moofOffset + currentFragment.moofSize; + } else { + await this.isobmffReader.reader.loadRange(this.isobmffReader.pos, this.isobmffReader.pos + 16); + const startPos = this.isobmffReader.pos; + const boxInfo = this.isobmffReader.readBoxHeader(); + + if (boxInfo.name === 'moof') { + const index = binarySearchExact(this.fragments, startPos, x => x.moofOffset); + + if (index === -1) { + this.isobmffReader.pos = startPos; + + const fragment = await this.readFragment(); // Recursive call + if (currentFragment) currentFragment.nextFragment = fragment; + currentFragment = fragment; + } else { + // We already know this fragment + const fragment = this.fragments[index]!; + if (currentFragment) currentFragment.nextFragment = fragment; + currentFragment = fragment; + } + } + + this.isobmffReader.pos = startPos + boxInfo.totalSize; + } + + if (currentFragment && currentFragment.trackData.has(trackId)) { + lastFragment = currentFragment; + } + } + + if (lastFragment) { + const otherTrackData = lastFragment.trackData.get(trackId)!; + assert(otherTrackData.startTimestampIsFinal); + + offsetFragmentTrackDataByTimestamp(trackData, otherTrackData.endTimestamp); + } + + trackData.startTimestampIsFinal = true; + } + + return fragment; + } + readContiguousBoxes(totalSize: number) { const startIndex = this.isobmffReader.pos; @@ -221,7 +399,8 @@ export class IsobmffDemuxer extends Demuxer { switch (boxInfo.name) { case 'mdia': case 'minf': - case 'dinf': { + case 'dinf': + case 'mfra': { this.readContiguousBoxes(boxInfo.contentSize); }; break; @@ -251,6 +430,9 @@ export class IsobmffDemuxer extends Demuxer { rotation: 0, sampleTableOffset: -1, sampleTable: null, + fragmentLookupTable: null, + currentFragmentState: null, + fragments: [], } satisfies InternalTrack as InternalTrack; this.currentTrack = track; @@ -307,7 +489,7 @@ export class IsobmffDemuxer extends Demuxer { // console.warn(`Wacky rotation matrix ${rotationMatrix}; sticking with no rotation.`); track.rotation = 0; } else { - track.rotation = 90 * matrixIndex; + track.rotation = (90 * matrixIndex) as Rotation; } }; break; @@ -763,6 +945,342 @@ export class IsobmffDemuxer extends Demuxer { track.sampleTable.chunkOffsets.push(chunkOffset); } }; break; + + case 'mvex': { + this.isFragmented = true; + this.readContiguousBoxes(boxInfo.contentSize); + }; break; + + case 'mehd': { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; // Flags + + const fragmentDuration = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + this.movieDurationInTimescale = fragmentDuration; + }; break; + + case 'trex': { + this.isobmffReader.pos += 4; // Version + flags + + const trackId = this.isobmffReader.readU32(); + const defaultSampleDescriptionIndex = this.isobmffReader.readU32(); + const defaultSampleDuration = this.isobmffReader.readU32(); + const defaultSampleSize = this.isobmffReader.readU32(); + const defaultSampleFlags = this.isobmffReader.readU32(); + + // We store these separately rather than in the tracks since the tracks may not exist yet + this.fragmentTrackDefaults.push({ + trackId, + defaultSampleDescriptionIndex, + defaultSampleDuration, + defaultSampleSize, + defaultSampleFlags, + }); + }; break; + + case 'tfra': { + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; // Flags + + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find(x => x.id === trackId); + if (!track) { + break; + } + + track.fragmentLookupTable = []; + + const word = this.isobmffReader.readU32(); + + const lengthSizeOfTrafNum = (word & 0b110000) >> 4; + const lengthSizeOfTrunNum = (word & 0b001100) >> 2; + const lengthSizeOfSampleNum = word & 0b000011; + + const x = this.isobmffReader; + const functions = [x.readU8.bind(x), x.readU16.bind(x), x.readU24.bind(x), x.readU32.bind(x)]; + + const readTrafNum = functions[lengthSizeOfTrafNum]!; + const readTrunNum = functions[lengthSizeOfTrunNum]!; + const readSampleNum = functions[lengthSizeOfSampleNum]!; + + const numberOfEntries = this.isobmffReader.readU32(); + for (let i = 0; i < numberOfEntries; i++) { + const time = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + const moofOffset = version === 1 ? this.isobmffReader.readU64() : this.isobmffReader.readU32(); + + // eslint-disable-next-line @typescript-eslint/no-unused-vars + const trafNumber = readTrafNum(); + // eslint-disable-next-line @typescript-eslint/no-unused-vars + const trunNumber = readTrunNum(); + // eslint-disable-next-line @typescript-eslint/no-unused-vars + const sampleNumber = readSampleNum(); + + track.fragmentLookupTable.push({ + timestamp: time, + moofOffset, + }); + } + }; break; + + case 'moof': { + this.currentFragment = { + moofOffset: startPos, + moofSize: boxInfo.totalSize, + implicitBaseDataOffset: startPos, + trackData: new Map(), + dataStart: Infinity, + dataEnd: 0, + nextFragment: null, + }; + + this.readContiguousBoxes(boxInfo.contentSize); + + const insertionIndex = binarySearchLessOrEqual( + this.fragments, + this.currentFragment.moofOffset, + x => x.moofOffset, + ); + this.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + + // Compute the byte range of the sample data in this fragment, so we can load the whole fragment at once + for (const [, trackData] of this.currentFragment.trackData) { + const firstSample = trackData.samples[0]!; + const lastSample = last(trackData.samples)!; + + this.currentFragment.dataStart = Math.min( + this.currentFragment.dataStart, + firstSample.byteOffset, + ); + this.currentFragment.dataEnd = Math.max( + this.currentFragment.dataEnd, + lastSample.byteOffset + lastSample.byteSize, + ); + } + + this.currentFragment = null; + }; break; + + case 'traf': { + assert(this.currentFragment); + + this.readContiguousBoxes(boxInfo.contentSize); + + // It is possible that there is no current track, for example when we don't care about the track + // referenced in the track fragment header. + if (this.currentTrack) { + const trackData = this.currentFragment.trackData.get(this.currentTrack.id); + if (trackData) { + // We know there is sample data for this track in this fragment, so let's add it to the + // track's fragments: + const insertionIndex = binarySearchLessOrEqual( + this.currentTrack.fragments, + this.currentFragment.moofOffset, + x => x.moofOffset, + ); + this.currentTrack.fragments.splice(insertionIndex + 1, 0, this.currentFragment); + + const { currentFragmentState } = this.currentTrack; + assert(currentFragmentState); + + if (currentFragmentState.startTimestamp !== null) { + offsetFragmentTrackDataByTimestamp(trackData, currentFragmentState.startTimestamp); + trackData.startTimestampIsFinal = true; + } + } + + this.currentTrack.currentFragmentState = null; + this.currentTrack = null; + } + }; break; + + case 'tfhd': { + assert(this.currentFragment); + + this.isobmffReader.pos += 1; // Version + + const flags = this.isobmffReader.readU24(); + const baseDataOffsetPresent = Boolean(flags & 0x000001); + const sampleDescriptionIndexPresent = Boolean(flags & 0x000002); + const defaultSampleDurationPresent = Boolean(flags & 0x000008); + const defaultSampleSizePresent = Boolean(flags & 0x000010); + const defaultSampleFlagsPresent = Boolean(flags & 0x000020); + const durationIsEmpty = Boolean(flags & 0x010000); + const defaultBaseIsMoof = Boolean(flags & 0x020000); + + const trackId = this.isobmffReader.readU32(); + const track = this.tracks.find(x => x.id === trackId); + if (!track) { + // We don't care about this track + break; + } + + const defaults = this.fragmentTrackDefaults.find(x => x.trackId === trackId); + + this.currentTrack = track; + track.currentFragmentState = { + baseDataOffset: this.currentFragment.implicitBaseDataOffset, + sampleDescriptionIndex: defaults?.defaultSampleDescriptionIndex ?? null, + defaultSampleDuration: defaults?.defaultSampleDuration ?? null, + defaultSampleSize: defaults?.defaultSampleSize ?? null, + defaultSampleFlags: defaults?.defaultSampleFlags ?? null, + startTimestamp: null, + }; + + if (baseDataOffsetPresent) { + track.currentFragmentState.baseDataOffset = this.isobmffReader.readU64(); + } else if (defaultBaseIsMoof) { + track.currentFragmentState.baseDataOffset = this.currentFragment.moofOffset; + } + if (sampleDescriptionIndexPresent) { + track.currentFragmentState.sampleDescriptionIndex = this.isobmffReader.readU32(); + } + if (defaultSampleDurationPresent) { + track.currentFragmentState.defaultSampleDuration = this.isobmffReader.readU32(); + } + if (defaultSampleSizePresent) { + track.currentFragmentState.defaultSampleSize = this.isobmffReader.readU32(); + } + if (defaultSampleFlagsPresent) { + track.currentFragmentState.defaultSampleFlags = this.isobmffReader.readU32(); + } + if (durationIsEmpty) { + track.currentFragmentState.defaultSampleDuration = 0; + } + }; break; + + case 'tfdt': { + const track = this.currentTrack; + if (!track) { + break; + } + + assert(track.currentFragmentState); + + // break; + + const version = this.isobmffReader.readU8(); + this.isobmffReader.pos += 3; // Flags + + const baseMediaDecodeTime = version === 0 ? this.isobmffReader.readU32() : this.isobmffReader.readU64(); + track.currentFragmentState.startTimestamp = baseMediaDecodeTime; + }; break; + + case 'trun': { + const track = this.currentTrack; + if (!track) { + break; + } + + assert(this.currentFragment); + assert(track.currentFragmentState); + + if (this.currentFragment.trackData.has(track.id)) { + throw new Error('Can\'t have two trun boxes for the same track in one fragment.'); + } + + const version = this.isobmffReader.readU8(); + + const flags = this.isobmffReader.readU24(); + const dataOffsetPresent = Boolean(flags & 0x000001); + const firstSampleFlagsPresent = Boolean(flags & 0x000004); + const sampleDurationPresent = Boolean(flags & 0x000100); + const sampleSizePresent = Boolean(flags & 0x000200); + const sampleFlagsPresent = Boolean(flags & 0x000400); + const sampleCompositionTimeOffsetsPresent = Boolean(flags & 0x000800); + + const sampleCount = this.isobmffReader.readU32(); + + let dataOffset = track.currentFragmentState.baseDataOffset; + if (dataOffsetPresent) { + dataOffset += this.isobmffReader.readI32(); + } + let firstSampleFlags: number | null = null; + if (firstSampleFlagsPresent) { + firstSampleFlags = this.isobmffReader.readU32(); + } + + let currentOffset = dataOffset; + + if (sampleCount === 0) { + // Don't associate the fragment with the track if it has no samples, this simplifies other code + this.currentFragment.implicitBaseDataOffset = currentOffset; + break; + } + + let currentTimestamp = 0; + + const trackData: FragmentTrackData = { + startTimestamp: 0, + endTimestamp: 0, + samples: [], + presentationTimestamps: [], + startTimestampIsFinal: false, + }; + this.currentFragment.trackData.set(track.id, trackData); + + for (let i = 0; i < sampleCount; i++) { + let sampleDuration: number; + if (sampleDurationPresent) { + sampleDuration = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleDuration !== null); + sampleDuration = track.currentFragmentState.defaultSampleDuration; + } + + let sampleSize: number; + if (sampleSizePresent) { + sampleSize = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleSize !== null); + sampleSize = track.currentFragmentState.defaultSampleSize; + } + + let sampleFlags: number; + if (sampleFlagsPresent) { + sampleFlags = this.isobmffReader.readU32(); + } else { + assert(track.currentFragmentState.defaultSampleFlags !== null); + sampleFlags = track.currentFragmentState.defaultSampleFlags; + } + if (i === 0 && firstSampleFlags !== null) { + sampleFlags = firstSampleFlags; + } + + let sampleCompositionTimeOffset = 0; + if (sampleCompositionTimeOffsetsPresent) { + if (version === 0) { + sampleCompositionTimeOffset = this.isobmffReader.readU32(); + } else { + sampleCompositionTimeOffset = this.isobmffReader.readI32(); + } + } + + const isKeyFrame = !(sampleFlags & 0x00010000); + + trackData.samples.push({ + presentationTimestamp: currentTimestamp + sampleCompositionTimeOffset, + duration: sampleDuration, + byteOffset: currentOffset, + byteSize: sampleSize, + isKeyFrame, + }); + + currentOffset += sampleSize; + currentTimestamp += sampleDuration; + } + + trackData.presentationTimestamps = trackData.samples + .map((x, i) => ({ presentationTimestamp: x.presentationTimestamp, sampleIndex: i })) + .sort((a, b) => a.presentationTimestamp - b.presentationTimestamp); + + const firstSample = trackData.samples[trackData.presentationTimestamps[0]!.sampleIndex]!; + const lastSample = trackData.samples[last(trackData.presentationTimestamps)!.sampleIndex]!; + + trackData.startTimestamp = firstSample.presentationTimestamp; + trackData.endTimestamp = lastSample.presentationTimestamp + lastSample.duration; + + this.currentFragment.implicitBaseDataOffset = currentOffset; + }; break; } this.isobmffReader.pos = boxEndPos; @@ -773,6 +1291,13 @@ abstract class IsobmffTrackBacking implements InputTrackBacking { chunkToSampleIndex = new WeakMap(); sampleIndexToChunk = new Map>(); + chunkToFragmentLocation = new WeakMap(); + + fragmentLocationToChunk = new Map>(); + constructor(public internalTrack: InternalTrack) { } @@ -782,6 +1307,7 @@ abstract class IsobmffTrackBacking implements InputTrackBacking { } async getDuration() { + // TODO: Make this produce a proper result in fragmented files return this.internalTrack.durationInTimescale / this.internalTrack.timescale; } } @@ -820,6 +1346,206 @@ class IsobmffVideoTrackBacking extends IsobmffTrackBacking implements InputVideo }; } + async getFirstChunk() { + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => { + const fragment = this.internalTrack.fragments[0]; + return { + fragmentIndex: fragment ? 0 : -1, + sampleIndex: fragment ? 0 : -1, + correctSampleFound: !!fragment, + }; + }, + 0, + Infinity, + ); + } + + return this.fetchChunkForSampleIndex(0); + } + + async getChunk(timestamp: number) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findSampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale, + ); + } else { + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + return this.fetchChunkForSampleIndex(sampleIndex); + } + } + + async getNextChunk(chunk: EncodedVideoChunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === undefined) { + throw new Error('Chunk was not created from this track.'); + } + + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id)!; + const sample = trackData.samples[locationInFragment.sampleIndex]!; + + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + x => x.moofOffset, + ); + assert(fragmentIndex !== -1); + + return this.performFragmentedLookup( + () => { + if (locationInFragment.sampleIndex + 1 < trackData.samples.length) { + // We can simply take the next sample in the fragment + return { + fragmentIndex, + sampleIndex: locationInFragment.sampleIndex + 1, + correctSampleFound: true, + }; + } else { + // Walk the list of fragments until we find the next fragment for this track + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + + const trackData = currentFragment.trackData.get(this.internalTrack.id); + if (trackData) { + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + x => x.moofOffset, + ); + assert(fragmentIndex !== -1); + return { + fragmentIndex, + sampleIndex: 0, + correctSampleFound: true, + }; + } + } + + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false, + }; + } + }, + sample.presentationTimestamp, + Infinity, + ); + } + + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === undefined) { + throw new Error('Chunk was not created from this track.'); + } + return this.fetchChunkForSampleIndex(sampleIndex + 1); + } + + async getKeyChunk(timestamp: number) { + const timestampInTimescale = timestamp * this.internalTrack.timescale; + + if (this.internalTrack.demuxer.isFragmented) { + return this.performFragmentedLookup( + () => this.findKeySampleInFragmentsForTimestamp(timestampInTimescale), + timestampInTimescale, + timestampInTimescale, + ); + } + + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestampInTimescale); + const keyFrameSampleIndex = sampleIndex === -1 + ? -1 + : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + } + + async getNextKeyChunk(chunk: EncodedVideoChunk) { + if (this.internalTrack.demuxer.isFragmented) { + const locationInFragment = this.chunkToFragmentLocation.get(chunk); + if (locationInFragment === undefined) { + throw new Error('Chunk was not created from this track.'); + } + + const trackData = locationInFragment.fragment.trackData.get(this.internalTrack.id)!; + const sample = trackData.samples[locationInFragment.sampleIndex]!; + + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + locationInFragment.fragment.moofOffset, + x => x.moofOffset, + ); + assert(fragmentIndex !== -1); + + return this.performFragmentedLookup( + () => { + const nextKeyFrameIndex = trackData.samples.findIndex( + (x, i) => x.isKeyFrame && i > locationInFragment.sampleIndex, + ); + + if (nextKeyFrameIndex !== -1) { + // We can simply take the next key frame in the fragment + return { + fragmentIndex, + sampleIndex: nextKeyFrameIndex, + correctSampleFound: true, + }; + } else { + // Walk the list of fragments until we find the next fragment for this track + let currentFragment = locationInFragment.fragment; + while (currentFragment.nextFragment) { + currentFragment = currentFragment.nextFragment; + + const trackData = currentFragment.trackData.get(this.internalTrack.id); + if (trackData) { + const fragmentIndex = binarySearchExact( + this.internalTrack.fragments, + currentFragment.moofOffset, + x => x.moofOffset, + ); + assert(fragmentIndex !== -1); + + const keyFrameIndex = trackData.samples.findIndex(x => x.isKeyFrame); + if (keyFrameIndex === -1) { + throw new Error('Not supported: Fragment does not contain key sample.'); + } + + return { + fragmentIndex, + sampleIndex: keyFrameIndex, + correctSampleFound: true, + }; + } + } + + return { + fragmentIndex, + sampleIndex: -1, + correctSampleFound: false, + }; + } + }, + sample.presentationTimestamp, + Infinity, + ); + } + + const sampleIndex = this.chunkToSampleIndex.get(chunk); + if (sampleIndex === undefined) { + throw new Error('Chunk was not created from this track.'); + } + const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); + const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); + return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); + } + private async fetchChunkForSampleIndex(sampleIndex: number) { if (sampleIndex === -1) { return null; @@ -836,10 +1562,12 @@ class IsobmffVideoTrackBacking extends IsobmffTrackBacking implements InputVideo return null; } + // Load the entire chunk await this.internalTrack.demuxer.chunkReader.reader.loadRange( sampleInfo.chunkOffset, sampleInfo.chunkOffset + sampleInfo.chunkSize, ); + const data = this.internalTrack.demuxer.chunkReader.readRange( sampleInfo.sampleOffset, sampleInfo.sampleOffset + sampleInfo.sampleSize, @@ -858,41 +1586,216 @@ class IsobmffVideoTrackBacking extends IsobmffTrackBacking implements InputVideo return chunk; } - async getFirstChunk() { - return this.fetchChunkForSampleIndex(0); - } - - async getChunk(timestamp: number) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - return this.fetchChunkForSampleIndex(sampleIndex); - } - - async getNextChunk(chunk: EncodedVideoChunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === undefined) { - throw new Error('Chunk was not created from this track.'); + private async fetchChunkInFragment(fragment: Fragment, sampleIndex: number) { + if (sampleIndex === -1) { + return null; } - return this.fetchChunkForSampleIndex(sampleIndex + 1); - } - async getKeyChunk(timestamp: number) { - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const sampleIndex = getSampleIndexForTimestamp(sampleTable, timestamp * this.internalTrack.timescale); - const keyFrameSampleIndex = sampleIndex === -1 - ? -1 - : getRelevantKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(keyFrameSampleIndex); + const compositeKey = `${fragment.moofOffset}:${sampleIndex}`; + const existingChunk = this.fragmentLocationToChunk.get(compositeKey)?.deref(); + if (existingChunk) { + return existingChunk; + } + + const trackData = fragment.trackData.get(this.internalTrack.id)!; + const sample = trackData.samples[sampleIndex]; + assert(sample); + + // Load the entire fragment + await this.internalTrack.demuxer.chunkReader.reader.loadRange(fragment.dataStart, fragment.dataEnd); + + const data = this.internalTrack.demuxer.chunkReader.readRange( + sample.byteOffset, + sample.byteOffset + sample.byteSize, + ); + + const chunk = new EncodedVideoChunk({ + data, + timestamp: (1e6 * sample.presentationTimestamp) / this.internalTrack.timescale, + duration: (1e6 * sample.duration) / this.internalTrack.timescale, + type: sample.isKeyFrame ? 'key' : 'delta', + }); + + this.chunkToFragmentLocation.set(chunk, { fragment, sampleIndex }); + this.fragmentLocationToChunk.set(compositeKey, new WeakRef(chunk)); + + return chunk; + } + + private findSampleInFragmentsForTimestamp(timestampInTimescale: number) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + x => x.trackData.get(this.internalTrack.id)!.startTimestamp, + ); + let sampleIndex = -1; + let correctSampleFound = false; + + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]!; + const trackData = fragment.trackData.get(this.internalTrack.id)!; + + const index = binarySearchLessOrEqual( + trackData.presentationTimestamps, + timestampInTimescale, + x => x.presentationTimestamp, + ); + assert(index !== -1); + + sampleIndex = trackData.presentationTimestamps[index]!.sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + + return { fragmentIndex, sampleIndex, correctSampleFound }; + } + + private findKeySampleInFragmentsForTimestamp(timestampInTimescale: number) { + const fragmentIndex = binarySearchLessOrEqual( + this.internalTrack.fragments, + timestampInTimescale, + x => x.trackData.get(this.internalTrack.id)!.startTimestamp, + ); + let sampleIndex = -1; + let correctSampleFound = false; + + if (fragmentIndex !== -1) { + const fragment = this.internalTrack.fragments[fragmentIndex]!; + const trackData = fragment.trackData.get(this.internalTrack.id)!; + const index = trackData.presentationTimestamps.findLastIndex((x) => { + const sample = trackData.samples[x.sampleIndex]!; + return sample.isKeyFrame; + }); + + if (index === -1) { + throw new Error('Not supported: Fragment does not contain key sample.'); + } + + const entry = trackData.presentationTimestamps[index]!; + sampleIndex = entry.sampleIndex; + correctSampleFound = timestampInTimescale < trackData.endTimestamp; + } + + return { fragmentIndex, sampleIndex, correctSampleFound }; } + + /** Looks for a sample in the fragments while trying to load as few fragments as possible to retrieve it. */ + private async performFragmentedLookup( + // This function returns the best-matching sample that is currently loaded. Based on this information, we know + // which fragments we need to load to find the actual match. + getBestMatch: () => { fragmentIndex: number; sampleIndex: number; correctSampleFound: boolean }, + // The timestamp for which we know the correct sample will not come before it + earliestTimestamp: number, + // The timestamp for which we know the correct sample will not come after it + latestTimestamp: number, + ) { + const { fragmentIndex, sampleIndex, correctSampleFound } = getBestMatch(); + if (correctSampleFound) { + // The correct sample already exists, easy path. + const fragment = this.internalTrack.fragments[fragmentIndex]!; + return this.fetchChunkInFragment(fragment, sampleIndex); + } + + const demuxer = this.internalTrack.demuxer; + const release = await demuxer.fragmentLookupMutex.acquire(); // The algorithm requires exclusivity + + try { + const isobmffReader = demuxer.isobmffReader; + const sourceSize = await isobmffReader.reader.source._getSize(); + + let prevFragment: Fragment | null = null; + let bestFragmentIndex = fragmentIndex; + let bestSampleIndex = sampleIndex; + + let lookupEntry: FragmentLookupTableEntry | null = null; + if (this.internalTrack.fragmentLookupTable) { + // Search for a lookup entry; this way, we won't need to start searching from the start of the file + // but can jump right into the correct fragment (or at least nearby). + const index = binarySearchLessOrEqual( + this.internalTrack.fragmentLookupTable, + earliestTimestamp, + x => x.timestamp, + ); + + if (index !== -1) { + lookupEntry = this.internalTrack.fragmentLookupTable[index]!; + } + } + + if (fragmentIndex === -1) { + isobmffReader.pos = lookupEntry?.moofOffset ?? 0; + } else { + const fragment = this.internalTrack.fragments[fragmentIndex]!; + + if (!lookupEntry || fragment.moofOffset >= fragment.moofOffset) { + isobmffReader.pos = fragment.moofOffset + fragment.moofSize; + prevFragment = fragment; + } else { + isobmffReader.pos = lookupEntry.moofOffset; + } + } + + while (isobmffReader.pos < sourceSize) { + if (prevFragment) { + const trackData = prevFragment.trackData.get(this.internalTrack.id); + if (trackData && trackData.startTimestamp > latestTimestamp) { + // We're already past the upper bound, no need to keep searching + break; + } + + if (prevFragment.nextFragment) { + // Skip ahead quickly without needing to read the file again + isobmffReader.pos = prevFragment.nextFragment.moofOffset + prevFragment.nextFragment.moofSize; + prevFragment = prevFragment.nextFragment; + continue; + } + } + + // Load the header + await isobmffReader.reader.loadRange(isobmffReader.pos, isobmffReader.pos + 16); + const startPos = isobmffReader.pos; + const boxInfo = isobmffReader.readBoxHeader(); + + if (boxInfo.name === 'moof') { + const index = binarySearchExact(demuxer.fragments, startPos, x => x.moofOffset); + + if (index === -1) { + // This is the first time we've seen this fragment + isobmffReader.pos = startPos; + + const fragment = await demuxer.readFragment(); + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + + const { fragmentIndex, sampleIndex, correctSampleFound } = getBestMatch(); + if (correctSampleFound) { + const fragment = this.internalTrack.fragments[fragmentIndex]!; + return this.fetchChunkInFragment(fragment, sampleIndex); + } + if (fragmentIndex !== -1) { + bestFragmentIndex = fragmentIndex; + bestSampleIndex = sampleIndex; + } + } else { + // We already know this fragment + const fragment = demuxer.fragments[index]!; + if (prevFragment) prevFragment.nextFragment = fragment; + prevFragment = fragment; + } + } + + isobmffReader.pos = startPos + boxInfo.totalSize; + } + + if (bestFragmentIndex !== -1) { + // If we finished looping but didn't find a perfect match, still return the best match we found + const fragment = this.internalTrack.fragments[bestFragmentIndex]!; + return this.fetchChunkInFragment(fragment, bestSampleIndex); + } - async getNextKeyChunk(chunk: EncodedVideoChunk) { - const sampleIndex = this.chunkToSampleIndex.get(chunk); - if (sampleIndex === undefined) { - throw new Error('Chunk was not created from this track.'); + return null; + } finally { + release(); } - const sampleTable = this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack); - const nextKeyFrameSampleIndex = getNextKeyframeIndexForSample(sampleTable, sampleIndex); - return this.fetchChunkForSampleIndex(nextKeyFrameSampleIndex); } } @@ -1028,3 +1931,15 @@ const getNextKeyframeIndexForSample = (sampleTable: SampleTable, sampleIndex: nu const index = binarySearchLessOrEqual(sampleTable.keySampleIndices, sampleIndex, x => x); return sampleTable.keySampleIndices[index + 1] ?? -1; }; + +const offsetFragmentTrackDataByTimestamp = (trackData: FragmentTrackData, timestamp: number) => { + trackData.startTimestamp += timestamp; + trackData.endTimestamp += timestamp; + + for (const sample of trackData.samples) { + sample.presentationTimestamp += timestamp; + } + for (const entry of trackData.presentationTimestamps) { + entry.presentationTimestamp += timestamp; + } +}; diff --git a/src/isobmff/isobmff-muxer.ts b/src/isobmff/isobmff-muxer.ts index 3f1b5a2..a144c1a 100644 --- a/src/isobmff/isobmff-muxer.ts +++ b/src/isobmff/isobmff-muxer.ts @@ -701,20 +701,22 @@ export class IsobmffMuxer extends Muxer { this.boxWriter.writeBox(movieBox); } + // Not all tracks need to be present in every fragment + const tracksInFragment = this.trackDatas.filter(x => x.currentChunk); + // Write out an initial moof box; will be overwritten later once actual chunk offsets are known const moofOffset = this.writer.getPos(); - const moofBox = moof(fragmentNumber, this.trackDatas); + const moofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(moofBox); // Create the mdat box { - const mdatBox = mdat(false); // Initially assume no fragment is larger than 4 GiB + const mdatBox = mdat(false); // Initially assume the fragment is not larger than 4 GiB let totalTrackSampleSize = 0; // Compute the size of the mdat box - for (const trackData of this.trackDatas) { - assert(trackData.currentChunk); - for (const sample of trackData.currentChunk.samples) { + for (const trackData of tracksInFragment) { + for (const sample of trackData.currentChunk!.samples) { totalTrackSampleSize += sample.size; } } @@ -731,7 +733,7 @@ export class IsobmffMuxer extends Muxer { } // Write sample data - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.currentChunk!.offset = this.writer.getPos(); trackData.currentChunk!.moofOffset = moofOffset; @@ -744,11 +746,11 @@ export class IsobmffMuxer extends Muxer { // Now that we set the actual chunk offsets, fix the moof box const endPos = this.writer.getPos(); this.writer.seek(this.boxWriter.offsets.get(moofBox)!); - const newMoofBox = moof(fragmentNumber, this.trackDatas); + const newMoofBox = moof(fragmentNumber, tracksInFragment); this.boxWriter.writeBox(newMoofBox); this.writer.seek(endPos); - for (const trackData of this.trackDatas) { + for (const trackData of tracksInFragment) { trackData.finalizedChunks.push(trackData.currentChunk!); this.finalizedChunks.push(trackData.currentChunk!); trackData.currentChunk = null; diff --git a/src/misc.ts b/src/misc.ts index 34a8b34..6833a69 100644 --- a/src/misc.ts +++ b/src/misc.ts @@ -4,6 +4,8 @@ export function assert(x: unknown): asserts x { } } +export type Rotation = 0 | 90 | 180 | 270; + /** @public */ export type TransformationMatrix = [number, number, number, number, number, number, number, number, number]; diff --git a/src/reader.ts b/src/reader.ts index 783c334..b0b32a7 100644 --- a/src/reader.ts +++ b/src/reader.ts @@ -1,8 +1,6 @@ import { assert, binarySearchLessOrEqual, removeItem } from './misc'; import { Source } from './source'; -const PAGE_SIZE = 4096; - type ReadSegment = { start: number; end: number; @@ -27,32 +25,29 @@ export class Reader { constructor(public source: Source, public maxStorableBytes = Infinity) {} async loadRange(start: number, end: number) { - // Read rounded to the nearest page - const alignedStart = Math.floor(start / PAGE_SIZE) * PAGE_SIZE; - let alignedEnd = Math.ceil(end / PAGE_SIZE) * PAGE_SIZE; - alignedEnd = Math.min(alignedEnd, await this.source._getSize()); + end = Math.min(end, await this.source._getSize()); - const matchingLoadingSegment = this.loadingSegments.find(x => x.start <= alignedStart && x.end >= alignedEnd); + const matchingLoadingSegment = this.loadingSegments.find(x => x.start <= start && x.end >= end); if (matchingLoadingSegment) { // Simply wait for the existing promise to finish to avoid loading the same range twice await matchingLoadingSegment.promise; return; } - const encasingSegmentExists = this.loadedSegments.some(x => x.start <= alignedStart && x.end >= alignedEnd); + const encasingSegmentExists = this.loadedSegments.some(x => x.start <= start && x.end >= end); if (encasingSegmentExists) { // Nothing to load return; } - const bytesPromise = this.source._read(alignedStart, alignedEnd); - const loadingSegment: LoadingSegment = { start: alignedStart, end: alignedEnd, promise: bytesPromise }; + const bytesPromise = this.source._read(start, end); + const loadingSegment: LoadingSegment = { start, end, promise: bytesPromise }; this.loadingSegments.push(loadingSegment); const bytes = await bytesPromise; removeItem(this.loadingSegments, loadingSegment); - this.insertIntoLoadedSegments(alignedStart, bytes); + this.insertIntoLoadedSegments(start, bytes); } private insertIntoLoadedSegments(start: number, bytes: Uint8Array) { @@ -136,4 +131,23 @@ export class Reader { offset: segment.bytes.byteOffset + start - segment.start, }; } + + forgetRange(start: number, end: number) { + if (end <= start) { + return; + } + + const startIndex = binarySearchLessOrEqual(this.loadedSegments, start, x => x.start); + if (startIndex === -1) { + return; + } + + const segment = this.loadedSegments[startIndex]!; + if (segment.start !== start || segment.end !== end) { + return; + } + + this.loadedSegments.splice(startIndex, 1); + this.totalStoredBytes -= segment.bytes.byteLength; + } }