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Start work on demuxing

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This commit is contained in:
Vanilagy
2024-12-08 15:19:56 +01:00
parent 6730e41c07
commit ecfd193ae0
25 changed files with 5923 additions and 953 deletions
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src/isobmff/isobmff-boxes.ts
+3 -16
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@@ -9,8 +9,10 @@ import {
TRANSFER_CHARACTERISTICS_MAP,
MATRIX_COEFFICIENTS_MAP,
colorSpaceIsComplete,
IDENTITY_MATRIX,
rotationMatrix,
} from '../misc';
import { AudioCodec, SubtitleCodec, VideoCodec } from '../source';
import { AudioCodec, SubtitleCodec, VideoCodec } from '../codec';
import { formatSubtitleTimestamp } from '../subtitles';
import { Writer } from '../writer';
import {
@@ -208,21 +210,6 @@ const lastPresentedSample = (samples: Sample[]) => {
return result;
};
const rotationMatrix = (rotationInDegrees: number): TransformationMatrix => {
const theta = rotationInDegrees * (Math.PI / 180);
const cosTheta = Math.cos(theta);
const sinTheta = Math.sin(theta);
// Matrices are post-multiplied in ISOBMFF, meaning this is the transpose of your typical rotation matrix
return [
cosTheta, sinTheta, 0,
-sinTheta, cosTheta, 0,
0, 0, 1,
];
};
const IDENTITY_MATRIX = rotationMatrix(0);
const matrixToBytes = (matrix: TransformationMatrix) => {
return [
fixed_16_16(matrix[0]), fixed_16_16(matrix[1]), fixed_2_30(matrix[2]),