Merge "MP4: Use track header to get playback duration" into main am: d3dc8adf2c am: 49fb63b477
Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3124613
Change-Id: I0b612cbabf11830251d6f8c100e320ac9e082c82
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/media/module/extractors/mp4/MPEG4Extractor.cpp b/media/module/extractors/mp4/MPEG4Extractor.cpp
index b3707c8..f247f8c 100644
--- a/media/module/extractors/mp4/MPEG4Extractor.cpp
+++ b/media/module/extractors/mp4/MPEG4Extractor.cpp
@@ -523,11 +523,10 @@
}
[this, &track] {
- int64_t duration;
+ int64_t duration = track->mMdhdDurationUs;
int32_t samplerate;
// Only for audio track.
- if (track->elst_needs_processing && mHeaderTimescale != 0 &&
- AMediaFormat_getInt64(track->meta, AMEDIAFORMAT_KEY_DURATION, &duration) &&
+ if (track->elst_needs_processing && mHeaderTimescale != 0 && duration != 0 &&
AMediaFormat_getInt32(track->meta, AMEDIAFORMAT_KEY_SAMPLE_RATE, &samplerate)) {
// Elst has to be processed only the first time this function is called.
track->elst_needs_processing = false;
@@ -1645,7 +1644,10 @@
(long long) duration, (long long) mLastTrack->timescale);
return ERROR_MALFORMED;
}
- AMediaFormat_setInt64(mLastTrack->meta, AMEDIAFORMAT_KEY_DURATION, durationUs);
+ // Store this track's mdhd duration to calculate the padding.
+ mLastTrack->mMdhdDurationUs = (int64_t)durationUs;
+ } else {
+ mLastTrack->mMdhdDurationUs = 0;
}
uint8_t lang[2];
@@ -3907,17 +3909,18 @@
}
int32_t id;
+ int64_t duration;
if (version == 1) {
// we can get ctime value from U64_AT(&buffer[4])
// we can get mtime value from U64_AT(&buffer[12])
id = U32_AT(&buffer[20]);
- // we can get duration value from U64_AT(&buffer[28])
+ duration = U64_AT(&buffer[28]);
} else if (version == 0) {
// we can get ctime value from U32_AT(&buffer[4])
// we can get mtime value from U32_AT(&buffer[8])
id = U32_AT(&buffer[12]);
- // we can get duration value from U32_AT(&buffer[20])
+ duration = U32_AT(&buffer[20]);
} else {
return ERROR_UNSUPPORTED;
}
@@ -3926,6 +3929,15 @@
return ERROR_MALFORMED;
AMediaFormat_setInt32(mLastTrack->meta, AMEDIAFORMAT_KEY_TRACK_ID, id);
+ if (duration != 0 && mHeaderTimescale != 0) {
+ long double durationUs = ((long double)duration * 1000000) / mHeaderTimescale;
+ if (durationUs < 0 || durationUs > INT64_MAX) {
+ ALOGE("cannot represent %lld * 1000000 / %lld in 64 bits",
+ (long long) duration, (long long) mHeaderTimescale);
+ return ERROR_MALFORMED;
+ }
+ AMediaFormat_setInt64(mLastTrack->meta, AMEDIAFORMAT_KEY_DURATION, durationUs);
+ }
size_t matrixOffset = dynSize + 16;
int32_t a00 = U32_AT(&buffer[matrixOffset]);
diff --git a/media/module/extractors/mp4/include/MPEG4Extractor.h b/media/module/extractors/mp4/include/MPEG4Extractor.h
index 542a3e6..59626f6 100644
--- a/media/module/extractors/mp4/include/MPEG4Extractor.h
+++ b/media/module/extractors/mp4/include/MPEG4Extractor.h
@@ -96,7 +96,7 @@
uint8_t *mTx3gBuffer;
size_t mTx3gSize, mTx3gFilled;
-
+ int64_t mMdhdDurationUs;
Track() {
next = NULL;