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Drop big-endian PCM support for WaveDemuxer

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Vanilagy
2025-01-07 22:23:04 +01:00
parent e1c070fe7b
commit dc81afa1d9
1 changed files with 6 additions and 6 deletions
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src/wave/wave-demuxer.ts
+6 -6
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@@ -20,7 +20,6 @@ export class WaveDemuxer extends Demuxer {
riffReader: RiffReader; riffReader: RiffReader;
chunkReader: RiffReader; chunkReader: RiffReader;
littleEndian = true;
metadataPromise: Promise<void> | null = null; metadataPromise: Promise<void> | null = null;
dataStart = -1; dataStart = -1;
dataSize = -1; dataSize = -1;
@@ -44,7 +43,7 @@ export class WaveDemuxer extends Demuxer {
async readMetadata() { async readMetadata() {
return this.metadataPromise ??= (async () => { return this.metadataPromise ??= (async () => {
const riffType = this.riffReader.readAscii(4); const riffType = this.riffReader.readAscii(4);
this.littleEndian = this.riffReader.littleEndian = riffType === 'RIFF'; this.riffReader.littleEndian = riffType === 'RIFF';
const totalFileSize = this.riffReader.readU32() + 8; const totalFileSize = this.riffReader.readU32() + 8;
const format = this.riffReader.readAscii(4); const format = this.riffReader.readAscii(4);
@@ -141,19 +140,20 @@ export class WaveDemuxer extends Demuxer {
return 'alaw'; return 'alaw';
} }
if (this.audioInfo.format === WaveFormat.PCM) { if (this.audioInfo.format === WaveFormat.PCM) {
// All formats are little-endian
if (this.audioInfo.sampleSizeInBytes === 1) { if (this.audioInfo.sampleSizeInBytes === 1) {
return 'pcm-u8'; return 'pcm-u8';
} else if (this.audioInfo.sampleSizeInBytes === 2) { } else if (this.audioInfo.sampleSizeInBytes === 2) {
return this.littleEndian ? 'pcm-s16' : 'pcm-s16be'; return 'pcm-s16';
} else if (this.audioInfo.sampleSizeInBytes === 3) { } else if (this.audioInfo.sampleSizeInBytes === 3) {
return this.littleEndian ? 'pcm-s24' : 'pcm-s24be'; return 'pcm-s24';
} else if (this.audioInfo.sampleSizeInBytes === 4) { } else if (this.audioInfo.sampleSizeInBytes === 4) {
return this.littleEndian ? 'pcm-s32' : 'pcm-s32be'; return 'pcm-s32';
} }
} }
if (this.audioInfo.format === WaveFormat.IEEE_FLOAT) { if (this.audioInfo.format === WaveFormat.IEEE_FLOAT) {
if (this.audioInfo.sampleSizeInBytes === 4) { if (this.audioInfo.sampleSizeInBytes === 4) {
return this.littleEndian ? 'pcm-f32' : 'pcm-f32be'; return 'pcm-f32';
} }
} }