arcodange/mediabunny
1
0
Fork 0
mirror of https://github.com/arcodange-org/mediabunny.git synced 2026-09-29 03:43:50 +02:00
Code Issues Packages Projects Releases Wiki Activity

Rename

Browse Source
This commit is contained in:
Vanilagy
2025-05-12 15:16:30 +02:00
parent fd159ecce3
commit 550b849235
3 changed files with 20 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/codec-data.ts
+12 -12
View File
@@ -864,38 +864,38 @@ export type Vp9CodecInfo = {
matrixCoefficients: number;
};
export const extractVp9CodecInfoFromFrame = (
frame: Uint8Array,
export const extractVp9CodecInfoFromPacket = (
packet: Uint8Array,
): Vp9CodecInfo | null => {
// eslint-disable-next-line @stylistic/max-len
// https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.7-20170222-draft.pdf
// http://downloads.webmproject.org/docs/vp9/vp9-bitstream_superframe-and-uncompressed-header_v1.0.pdf
// Handle superframe
const lastByte = frame[frame.length - 1];
const lastByte = packet[packet.length - 1];
if (lastByte && (lastByte & 0xe0) === 0xc0) { // Is superframe
const bytesPerFrameSize = ((lastByte & 0x18) >> 3) + 1;
const numFrames = (lastByte & 0x07) + 1;
const indexSize = 2 + numFrames * bytesPerFrameSize;
// Verify matching marker bytes
if (frame[frame.length - indexSize] !== lastByte) {
if (packet[packet.length - indexSize] !== lastByte) {
return null;
}
// Get first frame size
let frameSize = 0;
const offset = frame.length - indexSize + 1;
const offset = packet.length - indexSize + 1;
for (let i = 0; i < bytesPerFrameSize; i++) {
if (!frame[offset + i]) return null;
frameSize |= frame[offset + i]! << (8 * i);
if (!packet[offset + i]) return null;
frameSize |= packet[offset + i]! << (8 * i);
}
frame = frame.subarray(0, frameSize);
packet = packet.subarray(0, frameSize);
}
const bitstream = new Bitstream(frame);
const bitstream = new Bitstream(packet);
// Frame marker (0b10)
const frameMarker = bitstream.readBits(2);
@@ -1044,12 +1044,12 @@ export type Av1CodecInfo = {
* When AV1 codec information is not provided by the container, we can still try to extract the information by digging
* into the AV1 bitstream.
*/
export const extractAv1CodecInfoFromFrame = (
data: Uint8Array,
export const extractAv1CodecInfoFromPacket = (
packet: Uint8Array,
): Av1CodecInfo | null => {
// https://aomediacodec.github.io/av1-spec/av1-spec.pdf
const bitstream = new Bitstream(data);
const bitstream = new Bitstream(packet);
const readLeb128 = (): number | null => {
let value = 0;