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Make VP9 and AV1 codec strings much more detailed

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This commit is contained in:
David Payr
2024-12-30 00:08:23 +01:00
parent d579556471
commit 94b43bf8da
4 changed files with 114 additions and 33 deletions
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src/isobmff/isobmff-boxes.ts
+18 -11
View File
@@ -601,18 +601,25 @@ export const vpcC = (trackData: IsobmffVideoTrackData) => {
const level = Number(parts[2]);
const bitDepth = Number(parts[3]);
const chromaSubsampling = 0;
const thirdByte = (bitDepth << 4) + (chromaSubsampling << 1) + Number(decoderConfig.colorSpace.fullRange);
const chromaSubsampling = parts[4] ? Number(parts[4]) : 1; // 4:2:0 colocated with luma (0,0)
const videoFullRangeFlag = parts[8] ? Number(parts[8]) : Number(decoderConfig.colorSpace.fullRange);
const thirdByte = (bitDepth << 4) + (chromaSubsampling << 1) + videoFullRangeFlag;
const colourPrimaries = decoderConfig.colorSpace.primaries
? COLOR_PRIMARIES_MAP[decoderConfig.colorSpace.primaries]
: 2; // Default to undetermined
const transferCharacteristics = decoderConfig.colorSpace.transfer
? TRANSFER_CHARACTERISTICS_MAP[decoderConfig.colorSpace.transfer]
: 2;
const matrixCoefficients = decoderConfig.colorSpace.matrix
? MATRIX_COEFFICIENTS_MAP[decoderConfig.colorSpace.matrix]
: 2;
const colourPrimaries = parts[5]
? Number(parts[5])
: decoderConfig.colorSpace.primaries
? COLOR_PRIMARIES_MAP[decoderConfig.colorSpace.primaries]
: 2; // Default to undetermined
const transferCharacteristics = parts[6]
? Number(parts[6])
: decoderConfig.colorSpace.transfer
? TRANSFER_CHARACTERISTICS_MAP[decoderConfig.colorSpace.transfer]
: 2;
const matrixCoefficients = parts[7]
? Number(parts[7])
: decoderConfig.colorSpace.matrix
? MATRIX_COEFFICIENTS_MAP[decoderConfig.colorSpace.matrix]
: 2;
return fullBox('vpcC', 1, 0, [
u8(profile), // Profile
src/isobmff/isobmff-demuxer.ts
+29 -10
View File
@@ -728,11 +728,22 @@ export class IsobmffDemuxer extends Demuxer {
const profile = this.isobmffReader.readU8();
const level = this.isobmffReader.readU8();
const thirdByte = this.isobmffReader.readU8();
const bitDepth = thirdByte >> 4;
const chromaSubsampling = (thirdByte >> 1) & 0b111;
const videoFullRangeFlag = thirdByte & 1;
const colourPrimaries = this.isobmffReader.readU8();
const transferCharacteristics = this.isobmffReader.readU8();
const matrixCoefficients = this.isobmffReader.readU8();
track.info.vp9CodecInfo = {
profile: profile,
level: level,
bitDepth: thirdByte >> 4,
profile,
level,
bitDepth,
chromaSubsampling,
videoFullRangeFlag,
colourPrimaries,
transferCharacteristics,
matrixCoefficients,
};
}; break;
@@ -743,22 +754,30 @@ export class IsobmffDemuxer extends Demuxer {
this.isobmffReader.pos += 1; // Marker + version
const secondByte = this.isobmffReader.readU8();
const seqProfile = secondByte >> 5;
const seqLevelIdx0 = secondByte & 0b11111;
const profile = secondByte >> 5;
const level = secondByte & 0b11111;
const thirdByte = this.isobmffReader.readU8();
const seqTier0 = thirdByte >> 7;
const tier = thirdByte >> 7;
const highBitDepth = (thirdByte >> 6) & 1;
const twelveBit = (thirdByte >> 5) & 1;
const monochrome = (thirdByte >> 4) & 1;
const chromaSubsamplingX = (thirdByte >> 3) & 1;
const chromaSubsamplingY = (thirdByte >> 2) & 1;
const chromaSamplePosition = thirdByte & 0b11;
// Logic from https://aomediacodec.github.io/av1-spec/av1-spec.pdf
const bitDepth = seqProfile == 2 && highBitDepth ? (twelveBit ? 12 : 10) : (highBitDepth ? 10 : 8);
const bitDepth = profile == 2 && highBitDepth ? (twelveBit ? 12 : 10) : (highBitDepth ? 10 : 8);
track.info.av1CodecInfo = {
seqProfile,
seqLevelIdx0,
seqTier0,
profile,
level,
tier,
bitDepth,
monochrome,
chromaSubsamplingX,
chromaSubsamplingY,
chromaSamplePosition,
};
}; break;