Merge cherrypicks of ['googleplex-android-review.googlesource.com/22316577'] into tm-platform-release.
Change-Id: I8e3c72aa46d632a955d5497235e0a64c3723e3ab
diff --git a/media/libaudioclient/AudioTrack.cpp b/media/libaudioclient/AudioTrack.cpp
index b899951..7cc8a34 100644
--- a/media/libaudioclient/AudioTrack.cpp
+++ b/media/libaudioclient/AudioTrack.cpp
@@ -2275,7 +2275,6 @@
// obtainBuffer() is called with mutex unlocked, so keep extra references to these fields to
// keep them from going away if another thread re-creates the track during obtainBuffer()
sp<AudioTrackClientProxy> proxy;
- sp<IMemory> iMem;
{ // start of lock scope
AutoMutex lock(mLock);
@@ -2301,8 +2300,9 @@
}
// Keep the extra references
+ mProxyObtainBufferRef = mProxy;
proxy = mProxy;
- iMem = mCblkMemory;
+ mCblkMemoryObtainBufferRef = mCblkMemory;
if (mState == STATE_STOPPING) {
status = -EINTR;
@@ -2350,6 +2350,8 @@
buffer.mFrameCount = stepCount;
buffer.mRaw = audioBuffer->raw;
+ sp<IMemory> tempMemory;
+ sp<AudioTrackClientProxy> tempProxy;
AutoMutex lock(mLock);
if (audioBuffer->sequence != mSequence) {
// This Buffer came from a different IAudioTrack instance, so ignore the releaseBuffer
@@ -2359,7 +2361,12 @@
}
mReleased += stepCount;
mInUnderrun = false;
- mProxy->releaseBuffer(&buffer);
+ mProxyObtainBufferRef->releaseBuffer(&buffer);
+ // The extra reference of shared memory and proxy from `obtainBuffer` is not used after
+ // calling `releaseBuffer`. Move the extra reference to a temp strong pointer so that it
+ // will be cleared outside `releaseBuffer`.
+ tempMemory = std::move(mCblkMemoryObtainBufferRef);
+ tempProxy = std::move(mProxyObtainBufferRef);
// restart track if it was disabled by audioflinger due to previous underrun
restartIfDisabled();
diff --git a/media/libaudioclient/include/media/AudioTrack.h b/media/libaudioclient/include/media/AudioTrack.h
index ee81ef8..ec2f2a2 100644
--- a/media/libaudioclient/include/media/AudioTrack.h
+++ b/media/libaudioclient/include/media/AudioTrack.h
@@ -1313,6 +1313,11 @@
audio_track_cblk_t* mCblk; // re-load after mLock.unlock()
audio_io_handle_t mOutput = AUDIO_IO_HANDLE_NONE; // from AudioSystem::getOutputForAttr()
+ // A copy of shared memory and proxy between obtainBuffer and releaseBuffer to keep the
+ // shared memory valid when processing data.
+ sp<IMemory> mCblkMemoryObtainBufferRef GUARDED_BY(mLock);
+ sp<AudioTrackClientProxy> mProxyObtainBufferRef GUARDED_BY(mLock);
+
sp<AudioTrackThread> mAudioTrackThread;
bool mThreadCanCallJava;
