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Minor cleanup

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This commit is contained in:
David Payr
2025-01-08 14:43:16 +01:00
parent b6b82084d4
commit fbe084d721
1 changed files with 6 additions and 8 deletions
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src/wave/wave-muxer.ts
+6 -8
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@@ -62,26 +62,24 @@ export class WaveMuxer extends Muxer {
} }
private writeHeader(track: OutputAudioTrack, config: AudioDecoderConfig) { private writeHeader(track: OutputAudioTrack, config: AudioDecoderConfig) {
const codec = track.source._codec;
let format: WaveFormat; let format: WaveFormat;
let sampleSize: number;
const codec = track.source._codec;
const pcmInfo = parsePcmCodec(codec as PcmAudioCodec); const pcmInfo = parsePcmCodec(codec as PcmAudioCodec);
if (pcmInfo.dataType === 'ulaw') { if (pcmInfo.dataType === 'ulaw') {
format = WaveFormat.MULAW; format = WaveFormat.MULAW;
sampleSize = 1;
} else if (pcmInfo.dataType === 'alaw') { } else if (pcmInfo.dataType === 'alaw') {
format = WaveFormat.ALAW; format = WaveFormat.ALAW;
sampleSize = 1; } else if (pcmInfo.dataType === 'float') {
format = WaveFormat.IEEE_FLOAT;
} else { } else {
format = pcmInfo.dataType === 'float' ? WaveFormat.IEEE_FLOAT : WaveFormat.PCM; format = WaveFormat.PCM;
sampleSize = pcmInfo.sampleSize;
} }
const channels = config.numberOfChannels; const channels = config.numberOfChannels;
const sampleRate = config.sampleRate; const sampleRate = config.sampleRate;
const blockSize = sampleSize * channels; const blockSize = pcmInfo.sampleSize * channels;
// RIFF header // RIFF header
this.riffWriter.writeAscii('RIFF'); this.riffWriter.writeAscii('RIFF');
@@ -96,7 +94,7 @@ export class WaveMuxer extends Muxer {
this.riffWriter.writeU32(sampleRate); this.riffWriter.writeU32(sampleRate);
this.riffWriter.writeU32(sampleRate * blockSize); // Bytes per second this.riffWriter.writeU32(sampleRate * blockSize); // Bytes per second
this.riffWriter.writeU16(blockSize); this.riffWriter.writeU16(blockSize);
this.riffWriter.writeU16(8 * sampleSize); this.riffWriter.writeU16(8 * pcmInfo.sampleSize);
// data chunk // data chunk
this.riffWriter.writeAscii('data'); this.riffWriter.writeAscii('data');