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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/adts/adts-demuxer.ts
+4 -4
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@@ -22,9 +22,9 @@ import {
import { EncodedPacket, PLACEHOLDER_DATA } from '../packet';
import { readBytes, Reader } from '../reader';
import { DEFAULT_TRACK_DISPOSITION } from '../metadata';
import { FrameHeader, MAX_FRAME_HEADER_SIZE, MIN_FRAME_HEADER_SIZE, readFrameHeader } from './adts-reader';
import { AdtsFrameHeader, MAX_FRAME_HEADER_SIZE, MIN_FRAME_HEADER_SIZE, readAdtsFrameHeader } from './adts-reader';
const SAMPLES_PER_AAC_FRAME = 1024;
export const SAMPLES_PER_AAC_FRAME = 1024;
type Sample = {
timestamp: number;
@@ -37,7 +37,7 @@ export class AdtsDemuxer extends Demuxer {
reader: Reader;
metadataPromise: Promise<void> | null = null;
firstFrameHeader: FrameHeader | null = null;
firstFrameHeader: AdtsFrameHeader | null = null;
loadedSamples: Sample[] = [];
tracks: InputAudioTrack[] = [];
@@ -76,7 +76,7 @@ export class AdtsDemuxer extends Demuxer {
return;
}
const header = readFrameHeader(slice);
const header = readAdtsFrameHeader(slice);
if (!header) {
this.lastSampleLoaded = true;
return;
src/adts/adts-reader.ts
+2 -2
View File
@@ -12,7 +12,7 @@ import { FileSlice, readBytes } from '../reader';
export const MIN_FRAME_HEADER_SIZE = 7;
export const MAX_FRAME_HEADER_SIZE = 9;
export type FrameHeader = {
export type AdtsFrameHeader = {
objectType: number;
samplingFrequencyIndex: number;
channelConfiguration: number;
@@ -22,7 +22,7 @@ export type FrameHeader = {
startPos: number;
};
export const readFrameHeader = (slice: FileSlice): FrameHeader | null => {
export const readAdtsFrameHeader = (slice: FileSlice): AdtsFrameHeader | null => {
// https://wiki.multimedia.cx/index.php/ADTS (last visited: 2025/08/17)
const startPos = slice.filePos;