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Merge pull request #255 from mayurk2:use_edts_offset_if_it_is_for_entire_file

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PiperOrigin-RevId: 513213229
This commit is contained in:
tonihei 2023-03-01 17:27:15 +00:00
commit 17499cefcc
1 changed files with 22 additions and 5 deletions
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27
libraries/extractor/src/main/java/androidx/media3/extractor/mp4/FragmentedMp4Extractor.java
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@ -970,6 +970,26 @@ public class FragmentedMp4Extractor implements Extractor {
return version == 1 ? tfdt.readUnsignedLongToLong() : tfdt.readUnsignedInt();
}
private static boolean isEdtsListDurationForEntireMediaTimeline(Track track) {
// Currently we only support a single edit that moves the entire media timeline (indicated by
// duration == 0 or (editListDurationUs + editListMediaTimeUs) >= track duration.
// Other uses of edit lists are uncommon and unsupported.
if (track.editListDurations == null
|| track.editListDurations.length != 1
|| track.editListMediaTimes == null) {
return false;
}
if (track.editListDurations[0] == 0) {
return true;
}
long editListEndMediaTimeUs =
Util.scaleLargeTimestamp(
track.editListDurations[0] + track.editListMediaTimes[0],
C.MICROS_PER_SECOND,
track.movieTimescale);
return editListEndMediaTimeUs >= track.durationUs;
}
/**
* Parses a trun atom (defined in 14496-12).
*
@ -1017,11 +1037,8 @@ public class FragmentedMp4Extractor implements Extractor {
// ensure that the first frame's presentation timestamp is zero.
long edtsOffset = 0;
// Currently we only support a single edit that moves the entire media timeline (indicated by
// duration == 0). Other uses of edit lists are uncommon and unsupported.
if (track.editListDurations != null
&& track.editListDurations.length == 1
&& track.editListDurations[0] == 0) {
// Currently we only support a single edit that moves the entire media timeline.
if (isEdtsListDurationForEntireMediaTimeline(track)) {
edtsOffset = castNonNull(track.editListMediaTimes)[0];
}