mediabunny/dist/metamuxer.min.mjs

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TypeError("StreamTarget requires a WritableStream instance.");if(e!=null&&typeof e!="object")throw new TypeError("StreamTarget options, when provided, must be an object.");if(e.chunked!==void 0&&typeof e.chunked!="boolean")throw new TypeError("options.chunked, when provided, must be a boolean.");if(e.chunkSize!==void 0&&(!Number.isInteger(e.chunkSize)||e.chunkSize<=0))throw new TypeError("options.chunkSize, when provided, must be a positive integer.");this._writable=i,this._options=e}_createWriter(){return this._options.chunked?new fe(this):new me(this)}};var rt=(r,i,e)=>{if(r==="avc"){let t=100;i<=768&&e<=432?t=66:i<=1920&&e<=1080&&(t=77);let s=0,o=i>1920||e>1080?50:41,a=t.toString(16).padStart(2,"0"),n=s.toString(16).padStart(2,"0"),u=o.toString(16).padStart(2,"0");return`avc1.${a}${n}${u}`}else if(r==="hevc"){let t=0,s=1,o=Array(32).fill(0);o[s]=1;let a=parseInt(o.reverse().join(""),2).toString(16).replace(/^0+/,""),n="L",u=120;return i<=1280&&e<=720?u=93:i<=1920&&e<=1080?u=120:i<=3840&&e<=2160?u=150:(n="H",u=180),`hev1.${t===0?"":String.fromCharCode(65+t-1)}${s}.${a}.${n}${u}.B0`}else{if(r==="vp8")return"vp8";if(r==="vp9"){let t="00",s;return i<=854&&e<=480?s="21":i<=1280&&e<=720?s="31":i<=1920&&e<=1080?s="41":i<=3840&&e<=2160?s="51":s="61",`vp09.${t}.${s}.08`}else if(r==="av1"){let s;return i<=854&&e<=480?s="01":i<=1280&&e<=720?s="03":i<=1920&&e<=1080?s="04":i<=3840&&e<=2160?s="07":s="09",`av01.0.${s}M.08`}}throw new TypeError(`Unhandled codec '${r}'.`)},it=(r,i,e)=>{if(r==="aac")return i>=2&&e<=24e3?"mp4a.40.29":e<=24e3?"mp4a.40.5":"mp4a.40.2";if(r==="opus")return"opus";if(r==="vorbis")return"vorbis";throw new TypeError(`Unhandled codec '${r}'.`)},pe=r=>{if(!r)throw new TypeError("Video chunk metadata must be provided.");if(typeof r!="object")throw new TypeError("Video chunk metadata must be an object.");if(!r.decoderConfig)throw new TypeError("Video chunk metadata must include a decoder 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TypeError("Video chunk metadata decoder configuration colorSpace, when provided, must be an object.");let e=Object.keys(F);if(i.primaries!=null&&!e.includes(i.primaries))throw new TypeError(`Video chunk metadata decoder configuration colorSpace primaries, when defined, must be one of ${e.join(", ")}.`);let t=Object.keys(B);if(i.transfer!=null&&!t.includes(i.transfer))throw new TypeError(`Video chunk metadata decoder configuration colorSpace transfer, when defined, must be one of ${t.join(", ")}.`);let s=Object.keys(N);if(i.matrix!=null&&!s.includes(i.matrix))throw new TypeError(`Video chunk metadata decoder configuration colorSpace matrix, when defined, must be one of ${s.join(", ")}.`);if(i.fullRange!=null&&typeof i.fullRange!="boolean")throw new TypeError("Video chunk metadata decoder configuration colorSpace fullRange, when defined, must be a boolean.")}if((r.decoderConfig.codec.startsWith("avc1")||r.decoderConfig.codec.startsWith("avc3"))&&!r.decoderConfig.description)throw new 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Set;this.duration=0;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=_e(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=Oe(e)){e<0&&(e+=2**(t*8)),this.writeUnsignedInt(e,t)}writeEBMLVarInt(e,t=st(e)){let s=0;switch(t){case 1:this.helperView.setUint8(s++,128|e);break;case 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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 o=this.writer.getPos();if(this.dataOffsets.set(e,o),this.writeEBML(e.data),e.size!==-1){let a=this.writer.getPos()-o,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??_e(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 ee)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof j)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof te){let t=e.size??Oe(e.data.value);this.writeEBMLVarInt(t),this.writeSignedInt(e.data.value,t)}}}beforeTrackAdd(e){if(this.format instanceof q)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 q?"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]),o={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=o}createSegmentInfo(){let e={id:17545,data:new j(0)};this.segmentDuration=e;let t={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:ot},{id:22337,data:ot},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:cr[t.type]},{id:134,data:lr[t.track.source._codec]},...t.type==="video"?[t.info.decoderConfig.description?{id:25506,data:I(t.info.decoderConfig.description)}:null,t.track.metadata.frameRate?{id:2352003,data:1e9/t.track.metadata.frameRate}:null,{id:224,data:[{id:176,data:t.info.width},{id:186,data:t.info.height},(()=>{if(t.info.decoderConfig.colorSpace){let s=t.info.decoderConfig.colorSpace;return ae(s)?{id:21936,data:[{id:21937,data:N[s.matrix]},{id:21946,data:B[s.transfer]},{id:21947,data:F[s.primaries]},{id:21945,data:[1,2][Number(s.fullRange)]}]}:null}return null})()]}]:[],...t.type==="audio"?[t.info.decoderConfig.description?{id:25506,data:I(t.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ee(t.info.sampleRate)},{id:159,data:t.info.numberOfChannels}]}]:[],...t.type==="subtitle"?[{id:25506,data:x.encode(t.info.config.description)}]:[]]})}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:at,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 c(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;pe(t),c(t),c(t.decoderConfig),c(t.decoderConfig.codedWidth!==void 0),c(t.decoderConfig.codedHeight!==void 0);let o={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),o}getAudioTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;he(t),c(t),c(t.decoderConfig);let o={track:e,type:"audio",info:{numberOfChannels:t.decoderConfig.numberOfChannels,sampleRate:t.decoderConfig.sampleRate,decoderConfig:t.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),o}getSubtitleTrackData(e,t){let s=this.trackDatas.find(a=>a.track===e);if(s)return s;be(t),c(t),c(t.config);let o={track:e,type:"subtitle",info:{config:t.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((a,n)=>a.track.id-n.track.id),o}async addEncodedVideoChunk(e,t,s){let o=await this.mutex.acquire();try{let a=this.getVideoTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let u=this.validateAndNormalizeTimestamp(a.track,t.timestamp,t.type==="key"),d=this.createInternalChunk(n,u,(t.duration??0)/1e6,t.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(a,d),a.chunkQueue.push(d),await this.interleaveChunks()}finally{o()}}async addEncodedAudioChunk(e,t,s){let o=await this.mutex.acquire();try{let a=this.getAudioTrackData(e,s),n=new Uint8Array(t.byteLength);t.copyTo(n);let u=this.validateAndNormalizeTimestamp(a.track,t.timestamp,t.type==="key"),d=this.createInternalChunk(n,u,(t.duration??0)/1e6,t.type);a.chunkQueue.push(d),await this.interleaveChunks()}finally{o()}}async addSubtitleCue(e,t,s){let o=await this.mutex.acquire();try{let a=this.getSubtitleTrackData(e,s),n=this.validateAndNormalizeTimestamp(a.track,1e6*t.timestamp,!0),u=t.text,d=Math.floor(n*1e3);H.lastIndex=0,u=u.replace(H,_=>{let k=ue(_.slice(1,-1))-d;return`<${le(k)}>`});let m=x.encode(u),f=`${t.settings??""}
${t.identifier??""}
${t.notes??""}`,w=this.createInternalChunk(m,n,t.duration,"key",f.trim()?x.encode(f):null);a.chunkQueue.push(w),await this.interleaveChunks()}finally{o()}}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 o of this.trackDatas){if(o.chunkQueue.length===0&&!o.track.source._closed)break e;o.chunkQueue.length>0&&o.chunkQueue[0].timestamp<t&&(e=o,t=o.chunkQueue[0].timestamp)}if(!e)break;let s=e.chunkQueue.shift();this.writeBlock(e,s)}await this.writer.flush()}fixVP9ColorSpace(e,t){if(t.type!=="key"||!e.info.decoderConfig.colorSpace||!e.info.decoderConfig.colorSpace.matrix)return;let s=0;if(M(t.data,0,2)!==2)return;s+=2;let o=(M(t.data,s+1,s+2)<<1)+M(t.data,s+0,s+1);s+=2,o===3&&s++;let a=M(t.data,s+0,s+1);if(s++,a)return;let n=M(t.data,s+0,s+1);if(s++,n!==0)return;s+=2;let u=M(t.data,s+0,s+24);if(s+=24,u!==4817730)return;o>=2&&s++;let d={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];He(t.data,s+0,s+3,d)}createInternalChunk(e,t,s,o,a=null){return{data:e,type:o,timestamp:t,duration:s,additions:a}}writeBlock(e,t){this.segment||(this.createTracks(),this.createSegment());let s=Math.floor(1e3*t.timestamp),o=this.trackDatas.every(f=>{if(f.track.source._closed)return!0;if(e===f)return t.type==="key";let w=f.chunkQueue[0];return w&&w.type==="key"});(!this.currentCluster||o&&s-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(s);let a=s-this.currentClusterMsTimestamp;if(a<0)return;if(a>=Ee)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${Ee} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${Ee} milliseconds.`);let u=new Uint8Array(4),d=new DataView(u.buffer);d.setUint8(0,128|e.track.id),d.setInt16(1,a,!1);let m=Math.floor(1e3*t.duration);if(m===0&&!t.additions){d.setUint8(3,+(t.type==="key")<<7);let f={id:163,data:[u,t.data]};this.writeEBML(f)}else{let f={id:160,data:[{id:161,data:[u,t.data]},t.type==="delta"?{id:251,data:new te(e.lastWrittenMsTimestamp-s)}:null,t.additions?{id:30113,data:[{id:166,data:[{id:165,data:t.additions},{id:238,data:1}]}]}:null,m>0?{id:155,data:m}:null]};this.writeEBML(f)}this.duration=Math.max(this.duration,s+m),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:nt,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){c(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,nt),this.writer.seek(t);let s=this.offsets.get(this.currentCluster)-this.segmentDataOffset;c(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(o=>({id:183,data:[{id:247,data:o.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(),c(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,at),this.segmentDuration.data=new j(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 U=class{},Ve=class extends U{constructor(i={}){if(!i||typeof i!="object")throw new TypeError("options must be an object.");if(i.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(i.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=i}_createMuxer(i){return new Te(i,this)}},Ce=class extends U{constructor(i={}){if(!i||typeof i!="object")throw new TypeError("options must be an object.");if(i.streamable!==void 0&&typeof i.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=i}_createMuxer(i){return new we(i,this)}},q=class extends Ce{};var re=["avc","hevc","vp8","vp9","av1"],ie=["aac","opus"],Me=["webvtt"],K=class{constructor(){this._connectedTrack=null;this._closed=!1;this._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)}},O=class extends K{constructor(e){super();this._connectedTrack=null;if(!re.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${re.join(", ")}.`);this._codec=e}},Ie=class extends O{constructor(i){super(i)}digest(i,e){if(!(i instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,i,e)}},dr=5,mr=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!re.includes(r.codec))throw new TypeError(`Invalid video codec '${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'.")},se=class{constructor(i,e){this.source=i;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;mr(e)}async digest(i){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(i.codedWidth!==this.lastWidth||i.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${i.codedWidth}x${i.codedHeight}.`)}else this.lastWidth=i.codedWidth,this.lastHeight=i.codedHeight;this.ensureEncoder(i),c(this.encoder);let e=Math.floor(i.timestamp/1e6/dr);this.encoder.encode(i,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e,this.encoder.encodeQueueSize>=4&&await new Promise(t=>this.encoder.addEventListener("dequeue",t,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(i){this.encoder||(this.encoder=new VideoEncoder({output:(e,t)=>this.muxer.addEncodedVideoChunk(this.source._connectedTrack,e,t),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:rt(this.codecConfig.codec,i.codedWidth,i.codedHeight),width:i.codedWidth,height:i.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode}),c(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},ze=class extends O{constructor(i){super(i.codec),this._encoder=new se(this,i)}digest(i){if(!(i instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(i)}_flush(){return this._encoder.flush()}},Pe=class extends O{constructor(i,e){if(!(i instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new se(this,e),this._canvas=i}digest(i,e=0){if(!Number.isFinite(i)||i<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let t=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*i),duration:Math.round(1e6*e),alpha:"discard"}),s=this._encoder.digest(t);return t.close(),s}_flush(){return this._encoder.flush()}},Ue=class extends O{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._abortController=null;this._offsetTimestamps=!0;this._encoder=new se(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()}},E=class extends K{constructor(e){super();this._connectedTrack=null;if(!ie.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${ie.join(", ")}.`);this._codec=e}},De=class extends E{constructor(i){super(i)}digest(i,e){if(!(i instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,i,e)}},fr=r=>{if(!r||typeof r!="object")throw new TypeError("Codec config must be an object.");if(!ie.includes(r.codec))throw new TypeError(`Invalid audio codec '${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.")},oe=class{constructor(i,e){this.source=i;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;fr(e)}async digest(i){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(i.numberOfChannels!==this.lastNumberOfChannels||i.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${i.numberOfChannels} channels at ${i.sampleRate} Hz.`)}else this.lastNumberOfChannels=i.numberOfChannels,this.lastSampleRate=i.sampleRate;this.ensureEncoder(i),c(this.encoder),this.encoder.encode(i),this.encoder.encodeQueueSize>=4&&await new Promise(e=>this.encoder.addEventListener("dequeue",e,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(i){this.encoder||(this.encoder=new AudioEncoder({output:(e,t)=>this.muxer.addEncodedAudioChunk(this.source._connectedTrack,e,t),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:it(this.codecConfig.codec,i.numberOfChannels,i.sampleRate),numberOfChannels:i.numberOfChannels,sampleRate:i.sampleRate,bitrate:this.codecConfig.bitrate}),c(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},We=class extends E{constructor(i){super(i.codec),this._encoder=new oe(this,i)}digest(i){if(!(i instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(i)}_flush(){return this._encoder.flush()}},Re=class extends E{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new oe(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let t=e.numberOfChannels,s=e.sampleRate,o=e.length,a=new Float32Array(t*o);for(let d=0;d<t;d++){let m=e.getChannelData(d);a.set(m,d*o)}let n=new AudioData({format:"f32-planar",sampleRate:s,numberOfFrames:o,numberOfChannels:t,timestamp:Math.round(1e6*this._accumulatedFrameCount/s),data:a}),u=this._encoder.digest(n);return n.close(),this._accumulatedFrameCount+=o,u}_flush(){return this._encoder.flush()}},Fe=class extends E{constructor(e,t){if(!(e instanceof MediaStreamTrack)||e.kind!=="audio")throw new TypeError("track must be an audio MediaStreamTrack.");super(t.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new oe(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()}},L=class extends K{constructor(e){super();this._connectedTrack=null;if(!Me.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Me.join(", ")}.`);this._codec=e}},Be=class extends L{constructor(i){super(i),this._parser=new ne({codec:i,output:(e,t)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,t),error:e=>console.error("Subtitle parse error:",e)})}digest(i){if(typeof i!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(i),this._connectedTrack.output._muxer.mutex.currentPromise}};var Ne=class{constructor(i){this._tracks=[];this._started=!1;this._finalizing=!1;this._mutex=new W;if(!i||typeof i!="object")throw new TypeError("options must be an object.");if(!(i.format instanceof U))throw new TypeError("options.format must be an OutputFormat.");if(!(i.target instanceof P))throw new TypeError("options.target must be a Target.");if(i.target._output)throw new Error("Target is already used for another output.");i.target._output=this,this._writer=i.target._createWriter(),this._muxer=i.format._createMuxer(this)}addVideoTrack(i,e={}){if(!(i instanceof O))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(t=>!Number.isFinite(t))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",i,e)}addAudioTrack(i,e={}){if(!(i instanceof E))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",i,e)}addSubtitleTrack(i,e={}){if(!(i instanceof L))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",i,e)}_addTrack(i,e,t){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let s={id:this._tracks.length+1,output:this,type:i,source:e,metadata:t};this._muxer.beforeTrackAdd(s),this._tracks.push(s),e._connectedTrack=s}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let i=await this._mutex.acquire();await this._muxer.start();for(let e of this._tracks)e.source._start();i()}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 i=await this._mutex.acquire(),e=this._tracks.map(t=>t.source._flush());await Promise.all(e),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),i()}};export{ie as AUDIO_CODECS,J as ArrayBufferTarget,Re as AudioBufferSource,We as AudioDataSource,E as AudioSource,Pe as CanvasSource,De as EncodedAudioChunkSource,Ie as EncodedVideoChunkSource,K as MediaSource,Fe as MediaStreamAudioTrackSource,Ue as MediaStreamVideoTrackSource,Ce as MkvOutputFormat,Ve as Mp4OutputFormat,Ne as Output,U as OutputFormat,Me as SUBTITLE_CODECS,Ae as StreamTarget,L as SubtitleSource,P as Target,Be as TextSubtitleSource,re as VIDEO_CODECS,ze as VideoFrameSource,O as VideoSource,q as WebMOutputFormat};