arcodange/mediabunny
1
0
Fork 0
mirror of https://github.com/arcodange-org/mediabunny.git synced 2026-09-29 11:53:52 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix SourceRef race conditions, fix "source" and "target" getter returning unused instances, add missing validation, make "getDurationFromMetadata" only exist on tracks, fix examples, expand media player to support live playback, change the signatures of some Input APIs

Browse Source
This commit is contained in:
Vanilagy
2026-04-10 13:38:14 +02:00
parent 0813bcab28
commit aa810fc433
24 changed files with 493 additions and 476 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mp3/mp3-demuxer.ts
+31 -34
View File
@@ -178,38 +178,6 @@ export class Mp3Demuxer extends Demuxer {
return;
}
async getDurationFromMetadata(): Promise<number | null> {
await this.readMetadata();
assert(this.firstFrameHeader !== null);
assert(this.firstFrameHeaderPos !== null);
if (this.xingData) {
if (this.xingData.frameCount !== null) {
return this.xingData.frameCount
* this.firstFrameHeader.audioSamplesInFrame
/ this.firstFrameHeader.sampleRate;
}
} else {
// No Xing, assuming CBR
if (this.reader.fileSize !== null) {
const averageFrameSize = computeAverageMp3FrameSize(
this.firstFrameHeader.lowSamplingFrequency,
this.firstFrameHeader.layer,
this.firstFrameHeader.bitrate,
this.firstFrameHeader.sampleRate,
);
const frameCount = (this.reader.fileSize - this.firstFrameHeaderPos) / averageFrameSize;
return Math.round(frameCount)
* this.firstFrameHeader.audioSamplesInFrame
/ this.firstFrameHeader.sampleRate;
}
}
return null;
}
async getMimeType() {
return 'audio/mpeg';
}
@@ -309,8 +277,37 @@ class Mp3AudioTrackBacking implements InputAudioTrackBacking {
return null;
}
getDurationFromMetadata() {
return this.demuxer.getDurationFromMetadata();
async getDurationFromMetadata() {
const demuxer = this.demuxer;
assert(demuxer.firstFrameHeader !== null);
assert(demuxer.firstFrameHeaderPos !== null);
if (demuxer.xingData) {
if (demuxer.xingData.frameCount !== null) {
return demuxer.xingData.frameCount
* demuxer.firstFrameHeader.audioSamplesInFrame
/ demuxer.firstFrameHeader.sampleRate;
}
} else {
// No Xing, assuming CBR
if (demuxer.reader.fileSize !== null) {
const averageFrameSize = computeAverageMp3FrameSize(
demuxer.firstFrameHeader.lowSamplingFrequency,
demuxer.firstFrameHeader.layer,
demuxer.firstFrameHeader.bitrate,
demuxer.firstFrameHeader.sampleRate,
);
const frameCount = (demuxer.reader.fileSize - demuxer.firstFrameHeaderPos) / averageFrameSize;
return Math.round(frameCount)
* demuxer.firstFrameHeader.audioSamplesInFrame
/ demuxer.firstFrameHeader.sampleRate;
}
}
return null;
}
async getLiveRefreshInterval() {