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Remove sample correlation logic in decoder pipeline

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Vanilagy
2025-02-08 15:55:54 +01:00
parent b4d4c71916
commit 1d823805cf
8 changed files with 75 additions and 53 deletions
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src/mp3/mp3-misc.ts
+15
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@@ -44,6 +44,7 @@ export type FrameHeader = {
copyright: number;
original: number;
emphasis: number;
audioSamplesInFrame: number;
};
export const computeMp3FrameSize = (layer: number, bitrate: number, sampleRate: number, padding: number) => {
@@ -114,6 +115,19 @@ export const readFrameHeader = (word: number, reader: { pos: number; fileSize: n
return null;
}
let audioSamplesInFrame: number;
if (mpegVersionId === 3) {
audioSamplesInFrame = layer === 3 ? 384 : 1152;
} else {
if (layer === 3) {
audioSamplesInFrame = 384;
} else if (layer === 2) {
audioSamplesInFrame = 1152;
} else {
audioSamplesInFrame = 576;
}
}
return {
startPos: startPos,
totalSize: frameLength,
@@ -127,5 +141,6 @@ export const readFrameHeader = (word: number, reader: { pos: number; fileSize: n
copyright,
original,
emphasis,
audioSamplesInFrame,
};
};