arcodange/mediabunny
1
0
Fork 0
mirror of https://github.com/arcodange-org/mediabunny.git synced 2026-10-02 13:23:51 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add CMAF format and CMAF/init segment support to HLS muxer

Browse Source
This commit is contained in:
Vanilagy
2026-03-30 17:06:57 +02:00
parent 7b70756961
commit 3bcbcc13f0
16 changed files with 766 additions and 178 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/isobmff/isobmff-boxes.ts
+55 -9
View File
@@ -57,7 +57,7 @@ export class IsobmffBoxWriter {
*/
offsets = new WeakMap<Box, number>();
constructor(private writer: Writer) {}
constructor(public writer: Writer) {}
writeU32(value: number) {
this.helperView.setUint32(0, value, false);
@@ -279,6 +279,7 @@ export const ftyp = (details: {
isQuickTime: boolean;
holdsAvc: boolean;
fragmented: boolean;
cmaf: boolean;
}) => {
// You can find the full logic for this at
// https://github.com/FFmpeg/FFmpeg/blob/de2fb43e785773738c660cdafb9309b1ef1bc80d/libavformat/movenc.c#L5518
@@ -296,14 +297,27 @@ export const ftyp = (details: {
}
if (details.fragmented) {
return box('ftyp', [
ascii('iso5'), // Major brand
u32(minorVersion), // Minor version
// Compatible brands
ascii('iso5'),
ascii('iso6'),
ascii('mp41'),
]);
if (details.cmaf) {
return box('ftyp', [
ascii('iso5'), // Major brand
u32(minorVersion), // Minor version
// Compatible brands
ascii('iso5'),
ascii('iso6'),
ascii('mp41'),
ascii('cmfc'),
ascii('dash'),
]);
} else {
return box('ftyp', [
ascii('iso5'), // Major brand
u32(minorVersion), // Minor version
// Compatible brands
ascii('iso5'),
ascii('iso6'),
ascii('mp41'),
]);
}
}
return box('ftyp', [
@@ -316,6 +330,38 @@ export const ftyp = (details: {
]);
};
/** Segment Type Box */
export const styp = () => box('styp', [
ascii('iso5'), // Major brand
u32(0), // Minor version
// Compatible brands
ascii('iso5'),
ascii('iso6'),
ascii('mp41'),
ascii('cmfc'),
ascii('dash'),
]);
/** Segment Index Box */
export const sidx = (muxer: IsobmffMuxer, referencedSize: number) => {
let duration = muxer.maxWrittenEndTimestamp - muxer.minWrittenTimestamp;
if (!Number.isFinite(duration)) {
duration = 0;
}
return fullBox('sidx', 1, 0, [
u32(1), // Reference ID
u32(GLOBAL_TIMESCALE), // Timescale
u64(intoTimescale(muxer.minWrittenTimestamp, GLOBAL_TIMESCALE)), // Earliest presentation time
u64(0), // First offset
u16(0), // Reserved
u16(1), // Reference count
u32(referencedSize & 0x7fffffff), // Reference type (0) + referenced size
u32(intoTimescale(duration, GLOBAL_TIMESCALE)), // Subsegment duration
u32(0), // Starts with SAP + SAP type + SAP delta time (no information provided)
]);
};
/** Movie Sample Data Box. Contains the actual frames/samples of the media. */
export const mdat = (reserveLargeSize: boolean): Box => ({ type: 'mdat', largeSize: reserveLargeSize });