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Fix MP3 demuxer wrong data offset

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This commit is contained in:
Vanilagy
2025-09-03 21:26:57 +02:00
parent 09190b4e6e
commit 9c0ce3458b
6 changed files with 22 additions and 22 deletions
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src/mp3/mp3-demuxer.ts
+10 -12
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@@ -75,9 +75,7 @@ export class Mp3Demuxer extends Demuxer {
}
}
const startPos = this.lastLoadedPos;
const result = await readNextFrameHeader(this.reader, startPos, this.reader.fileSize);
const result = await readNextFrameHeader(this.reader, this.lastLoadedPos, this.reader.fileSize);
if (!result) {
this.lastSampleLoaded = true;
return;
@@ -89,16 +87,16 @@ export class Mp3Demuxer extends Demuxer {
const xingOffset = getXingOffset(header.mpegVersionId, header.channel);
let slice = this.reader.requestSlice(startPos + xingOffset, 4);
let slice = this.reader.requestSlice(result.startPos + xingOffset, 4);
if (slice instanceof Promise) slice = await slice;
assert(slice);
if (slice) {
const word = readU32Be(slice);
const isXing = word === XING || word === INFO;
const word = readU32Be(slice);
const isXing = word === XING || word === INFO;
if (isXing) {
// There's no actual audio data in this frame, so let's skip it
return;
if (isXing) {
// There's no actual audio data in this frame, so let's skip it
return;
}
}
if (!this.firstFrameHeader) {
@@ -109,7 +107,7 @@ export class Mp3Demuxer extends Demuxer {
const sample: Sample = {
timestamp: this.nextTimestampInSamples / header.sampleRate,
duration: sampleDuration,
dataStart: startPos,
dataStart: result.startPos,
dataSize: header.totalSize,
};