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Implement the bulk of the MPEG-TS demuxer, add a bunch of tests, and a few other things

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Vanilagy
2026-01-14 12:05:39 +01:00
parent f363fe50e2
commit 888441232d
22 changed files with 2023 additions and 61 deletions
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src/mp3/mp3-demuxer.ts
+4 -4
View File
@@ -14,7 +14,7 @@ import { DEFAULT_TRACK_DISPOSITION, MetadataTags } from '../metadata';
import { PacketRetrievalOptions } from '../media-sink';
import { assert, AsyncMutex, binarySearchExact, binarySearchLessOrEqual, UNDETERMINED_LANGUAGE } from '../misc';
import { EncodedPacket, PLACEHOLDER_DATA } from '../packet';
import { FrameHeader, getXingOffset, INFO, XING } from '../../shared/mp3-misc';
import { Mp3FrameHeader, getXingOffset, INFO, XING } from '../../shared/mp3-misc';
import {
ID3_V1_TAG_SIZE,
ID3_V2_HEADER_SIZE,
@@ -22,7 +22,7 @@ import {
parseId3V2Tag,
readId3V2Header,
} from '../id3';
import { readNextFrameHeader } from './mp3-reader';
import { readNextMp3FrameHeader } from './mp3-reader';
import { readAscii, readBytes, Reader, readU32Be } from '../reader';
type Sample = {
@@ -36,7 +36,7 @@ export class Mp3Demuxer extends Demuxer {
reader: Reader;
metadataPromise: Promise<void> | null = null;
firstFrameHeader: FrameHeader | null = null;
firstFrameHeader: Mp3FrameHeader | null = null;
loadedSamples: Sample[] = []; // All samples from the start of the file to lastLoadedPos
metadataTags: MetadataTags | null = null;
@@ -89,7 +89,7 @@ export class Mp3Demuxer extends Demuxer {
}
}
const result = await readNextFrameHeader(this.reader, this.lastLoadedPos, this.reader.fileSize);
const result = await readNextMp3FrameHeader(this.reader, this.lastLoadedPos, this.reader.fileSize);
if (!result) {
this.lastSampleLoaded = true;
return;
src/mp3/mp3-muxer.ts
+2 -2
View File
@@ -13,7 +13,7 @@ import { Output, OutputAudioTrack } from '../output';
import { Mp3OutputFormat } from '../output-format';
import { EncodedPacket } from '../packet';
import { Writer } from '../writer';
import { getXingOffset, INFO, readFrameHeader, XING } from '../../shared/mp3-misc';
import { getXingOffset, INFO, readMp3FrameHeader, XING } from '../../shared/mp3-misc';
import { Mp3Writer, XingFrameData } from './mp3-writer';
import { Id3V2Writer } from '../id3';
@@ -65,7 +65,7 @@ export class Mp3Muxer extends Muxer {
}
const word = view.getUint32(0, false);
const header = readFrameHeader(word, null).header;
const header = readMp3FrameHeader(word, null).header;
if (!header) {
throw new Error('Invalid MP3 header in sample.');
}
src/mp3/mp3-reader.ts
+4 -4
View File
@@ -6,11 +6,11 @@
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
import { FRAME_HEADER_SIZE, FrameHeader, readFrameHeader } from '../../shared/mp3-misc';
import { FRAME_HEADER_SIZE, Mp3FrameHeader, readMp3FrameHeader } from '../../shared/mp3-misc';
import { Reader, readU32Be } from '../reader';
export const readNextFrameHeader = async (reader: Reader, startPos: number, until: number | null): Promise<{
header: FrameHeader;
export const readNextMp3FrameHeader = async (reader: Reader, startPos: number, until: number | null): Promise<{
header: Mp3FrameHeader;
startPos: number;
} | null> => {
let currentPos = startPos;
@@ -22,7 +22,7 @@ export const readNextFrameHeader = async (reader: Reader, startPos: number, unti
const word = readU32Be(slice);
const result = readFrameHeader(word, reader.fileSize !== null ? reader.fileSize - currentPos : null);
const result = readMp3FrameHeader(word, reader.fileSize !== null ? reader.fileSize - currentPos : null);
if (result.header) {
return { header: result.header, startPos: currentPos };
}