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Add reusable Opus identification header parsing function

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Vanilagy
2025-02-07 20:14:01 +01:00
parent 50442691a5
commit b4d4c71916
4 changed files with 44 additions and 21 deletions
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src/ogg/ogg-demuxer.ts
+5 -5
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@@ -1,4 +1,4 @@
import { AudioCodec, parseOpusTocByte } from '../codec';
import { AudioCodec, parseOpusIdentificationHeader, parseOpusTocByte } from '../codec';
import { Demuxer } from '../demuxer';
import { Input } from '../input';
import { InputAudioTrack, InputAudioTrackBacking } from '../input-track';
@@ -236,12 +236,12 @@ export class OggDemuxer extends Demuxer {
bitstream.description = firstPacket.data;
bitstream.lastMetadataPacket = secondPacket;
const view = toDataView(firstPacket.data);
bitstream.numberOfChannels = view.getUint8(9);
bitstream.sampleRate = view.getUint32(12, true);
const header = parseOpusIdentificationHeader(firstPacket.data);
bitstream.numberOfChannels = header.outputChannelCount;
bitstream.sampleRate = header.inputSampleRate;
bitstream.opusInfo = {
preSkip: view.getUint16(10, true),
preSkip: header.preSkip,
};
}