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Add codec-specific encoder configs

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This commit is contained in:
Vanilagy
2024-11-30 19:30:43 +01:00
parent 25c271e4af
commit 3ae891842f
8 changed files with 141 additions and 23 deletions
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src/codec.ts
+39 -3
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@@ -181,6 +181,42 @@ export const buildAudioCodecString = (codec: AudioCodec, numberOfChannels: numbe
throw new TypeError(`Unhandled codec '${codec}'.`);
};
export const getVideoEncoderConfigExtension = (codec: VideoCodec) => {
if (codec === 'avc') {
return {
avc: {
format: 'avc' as const // Ensure the format is not Annex B
}
};
} else if (codec === 'hevc') {
return {
hevc: {
format: 'hevc' as const // Ensure the format is not Annex B
}
};
}
return {};
};
export const getAudioEncoderConfigExtension = (codec: AudioCodec) => {
if (codec === 'aac') {
return {
aac: {
format: 'aac' as const // Ensure the format is not ADTS
}
};
} else if (codec === 'opus') {
return {
opus: {
format: 'opus' as const
}
};
}
return {};
};
export const validateVideoChunkMetadata = (metadata: EncodedVideoChunkMetadata | undefined) => {
if (!metadata) {
throw new TypeError("Video chunk metadata must be provided.");
@@ -236,12 +272,9 @@ export const validateVideoChunkMetadata = (metadata: EncodedVideoChunkMetadata |
}
if ((metadata.decoderConfig.codec.startsWith('avc1') || metadata.decoderConfig.codec.startsWith('avc3')) && !metadata.decoderConfig.description) {
// TODO Technically not correct, they can also lack a description in which case the chunks are annexb. Generally,
// go through all the codec registrations and catch these edge cases.
throw new TypeError("Video chunk metadata decoder configuration for AVC must include a description, which is expected to be an AVCDecoderConfigurationRecord as specified in ISO 14496-15.");
}
if ((metadata.decoderConfig.codec.startsWith('hev1') || metadata.decoderConfig.codec.startsWith('hvc1')) && !metadata.decoderConfig.description) {
// TODO Same as above
throw new TypeError("Video chunk metadata decoder configuration for HEVC must include a description, which is expected to be an HEVCDecoderConfigurationRecord as specified in ISO 14496-15.");
}
if ((metadata.decoderConfig.codec === 'vp8' || metadata.decoderConfig.codec.startsWith('vp09')) && metadata.decoderConfig.colorSpace === undefined) {
@@ -278,6 +311,9 @@ export const validateAudioChunkMetadata = (metadata: EncodedAudioChunkMetadata |
}
}
if (metadata.decoderConfig.codec.startsWith('mp4a') && !metadata.decoderConfig.description) {
throw new TypeError("Audio chunk metadata decoder configuration for AAC must include a description, which is expected to be an AudioSpecificConfig as specified in ISO 14496-3.");
}
if (metadata.decoderConfig.codec === 'opus' && metadata.decoderConfig.description && metadata.decoderConfig.description.byteLength < 18) {
throw new TypeError('Invalid decoder description provided for Opus; must be at least 18 bytes long.');
}