Transcoder: Improve AV transcoding speed by enforcing sequential sample access.
MediaSampleReader was bottlenecking the transcoding pipeline due to
non-sequential sample access. This commit adds an option to the sample
reader to enforce sequential sample access by blocking reads until
the underlying extractor advances to that specific track.
Follow-up: b/165374867 Make MediaSampleWriter robust against buffering track transcoders
Fixes: 160268606
Test: Transcoder unit tests, and benchmark tests.
Change-Id: Id2a363d06df927ea3e547462c52803594e0511e1
diff --git a/media/libmediatranscoding/transcoder/tests/PassthroughTrackTranscoderTests.cpp b/media/libmediatranscoding/transcoder/tests/PassthroughTrackTranscoderTests.cpp
index b79f58c..a2ffbe4 100644
--- a/media/libmediatranscoding/transcoder/tests/PassthroughTrackTranscoderTests.cpp
+++ b/media/libmediatranscoding/transcoder/tests/PassthroughTrackTranscoderTests.cpp
@@ -159,6 +159,7 @@
MediaSampleReaderNDK::createFromFd(mSourceFd, 0, mSourceFileSize);
EXPECT_NE(mediaSampleReader, nullptr);
+ EXPECT_EQ(mediaSampleReader->selectTrack(mTrackIndex), AMEDIA_OK);
EXPECT_EQ(transcoder.configure(mediaSampleReader, mTrackIndex, nullptr /* destinationFormat */),
AMEDIA_OK);
ASSERT_TRUE(transcoder.start());