loliball/media3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Extract method to find minimum presentation timestamp across tracks

Browse Source 
This is a ground work of implementing depth/editing format interleave mode.

PiperOrigin-RevId: 663301670
This commit is contained in:
sheenachhabra 2024-08-15 07:37:41 -07:00 committed by Copybara-Service
parent 873ec1544e
commit 7a1f3629ff
1 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Writer.java
View File

@ -202,6 +202,17 @@ import java.util.concurrent.atomic.AtomicBoolean;
outputFileChannel.truncate(newMoovLocation + moovBytesNeeded);
}
private static long findMinimumPresentationTimestampUsAcrossTracks(List<Track> tracks) {
long minInputPtsUs = Long.MAX_VALUE;
for (int i = 0; i < tracks.size(); i++) {
Track track = tracks.get(i);
if (!track.writtenSamples.isEmpty()) {
minInputPtsUs = min(track.writtenSamples.get(0).presentationTimeUs, minInputPtsUs);
}
}
return minInputPtsUs;
}
private void writeHeader() throws IOException {
outputFileChannel.position(0L);
outputFileChannel.write(Boxes.ftyp());
@ -229,15 +240,8 @@ import java.util.concurrent.atomic.AtomicBoolean;
}
private ByteBuffer assembleCurrentMoovData() {
long minInputPtsUs = Long.MAX_VALUE;
// Recalculate the min timestamp every time, in case some new samples have smaller timestamps.
for (int i = 0; i < tracks.size(); i++) {
Track track = tracks.get(i);
if (!track.writtenSamples.isEmpty()) {
minInputPtsUs = Math.min(track.writtenSamples.get(0).presentationTimeUs, minInputPtsUs);
}
}
long minInputPtsUs = findMinimumPresentationTimestampUsAcrossTracks(tracks);
ByteBuffer moovHeader;
if (minInputPtsUs != Long.MAX_VALUE) {