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FragmentedMp4Extractor: allow both first_sample_flags and sample_flags

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Having both in the trun box is not allowed (see section section 8.8.8.1
of ISO/IEC 14496-12:2015) but this CL makes the code more robust in case
this happens. Before this change, the first sample flag was not read,
making subsequent reads incorrect.

Issue: #7698
PiperOrigin-RevId: 325212160
This commit is contained in:
kimvde 2020-08-06 13:40:00 +01:00 committed by kim-vde
parent 5169652575
commit f29af879c0
1 changed files with 4 additions and 2 deletions
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6
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/FragmentedMp4Extractor.java
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@ -1011,8 +1011,10 @@ public class FragmentedMp4Extractor implements Extractor {
checkNonNegative(sampleDurationsPresent ? trun.readInt() : defaultSampleValues.duration);
int sampleSize =
checkNonNegative(sampleSizesPresent ? trun.readInt() : defaultSampleValues.size);
int sampleFlags = (i == 0 && firstSampleFlagsPresent) ? firstSampleFlags
: sampleFlagsPresent ? trun.readInt() : defaultSampleValues.flags;
int sampleFlags =
sampleFlagsPresent
? trun.readInt()
: (i == 0 && firstSampleFlagsPresent) ? firstSampleFlags : defaultSampleValues.flags;
if (sampleCompositionTimeOffsetsPresent) {
// The BMFF spec (ISO 14496-12) states that sample offsets should be unsigned integers in
// version 0 trun boxes, however a significant number of streams violate the spec and use