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Validate video codec strings using regexes

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This commit is contained in:
David Payr
2024-12-30 00:47:01 +01:00
parent 06cedf1a26
commit 8f861f3cfe
2 changed files with 73 additions and 27 deletions
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src/isobmff/isobmff-boxes.ts
+4 -5
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@@ -594,7 +594,6 @@ export const vpcC = (trackData: IsobmffVideoTrackData) => {
}
const decoderConfig = trackData.info.decoderConfig;
assert(decoderConfig.colorSpace); // This is guaranteed by an earlier validation step
const parts = decoderConfig.codec.split('.'); // We can derive the required values from the codec string
const profile = Number(parts[1]);
@@ -602,22 +601,22 @@ export const vpcC = (trackData: IsobmffVideoTrackData) => {
const bitDepth = Number(parts[3]);
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 videoFullRangeFlag = parts[8] ? Number(parts[8]) : Number(decoderConfig.colorSpace?.fullRange ?? 0);
const thirdByte = (bitDepth << 4) + (chromaSubsampling << 1) + videoFullRangeFlag;
const colourPrimaries = parts[5]
? Number(parts[5])
: decoderConfig.colorSpace.primaries
: decoderConfig.colorSpace?.primaries
? COLOR_PRIMARIES_MAP[decoderConfig.colorSpace.primaries]
: 2; // Default to undetermined
const transferCharacteristics = parts[6]
? Number(parts[6])
: decoderConfig.colorSpace.transfer
: decoderConfig.colorSpace?.transfer
? TRANSFER_CHARACTERISTICS_MAP[decoderConfig.colorSpace.transfer]
: 2;
const matrixCoefficients = parts[7]
? Number(parts[7])
: decoderConfig.colorSpace.matrix
: decoderConfig.colorSpace?.matrix
? MATRIX_COEFFICIENTS_MAP[decoderConfig.colorSpace.matrix]
: 2;