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Explicitly model the supported codecs per output format

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This commit is contained in:
Vanilagy
2025-01-02 21:03:17 +01:00
parent 2471f55f20
commit 74369ee108
7 changed files with 154 additions and 42 deletions
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src/isobmff/isobmff-boxes.ts
+9 -4
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@@ -520,8 +520,11 @@ export const stsd = (trackData: IsobmffTrackData) => {
trackData,
);
} else if (trackData.type === 'audio') {
const boxName = AUDIO_CODEC_TO_BOX_NAME[trackData.track.source._codec];
assert(boxName);
sampleDescription = soundSampleDescription(
AUDIO_CODEC_TO_BOX_NAME[trackData.track.source._codec],
boxName,
trackData,
);
} else if (trackData.type === 'subtitle') {
@@ -690,7 +693,7 @@ export const soundSampleDescription = (
u16(0), // Packet size
u32(2 ** 16 * trackData.info.sampleRate), // Sample rate
], [
AUDIO_CODEC_TO_CONFIGURATION_BOX[trackData.track.source._codec](trackData),
AUDIO_CODEC_TO_CONFIGURATION_BOX[trackData.track.source._codec]!(trackData),
]);
/** MPEG-4 Elementary Stream Descriptor Box. */
@@ -1086,12 +1089,14 @@ const VIDEO_CODEC_TO_CONFIGURATION_BOX: Record<VideoCodec, (trackData: IsobmffVi
av1: av1C,
};
const AUDIO_CODEC_TO_BOX_NAME: Record<AudioCodec, string> = {
const AUDIO_CODEC_TO_BOX_NAME: Partial<Record<AudioCodec, string>> = {
aac: 'mp4a',
opus: 'Opus',
};
const AUDIO_CODEC_TO_CONFIGURATION_BOX: Record<AudioCodec, (trackData: IsobmffAudioTrackData) => Box | null> = {
const AUDIO_CODEC_TO_CONFIGURATION_BOX: Partial<
Record<AudioCodec, (trackData: IsobmffAudioTrackData) => Box | null>
> = {
aac: esds,
opus: dOps,
};