Add standby mode for aaudio service stream.
When the stream is stopped, everything will remain open but just stop
writing data. But this will keep the DSP running and using power
until the stream is closed.
To resolve this issue, the solution is to put the stream into standby
mode so that the HAL can release the corresponding resource.
When the HAL releases the resource, the shared file descriptor will also
be released. In that case, when the stream is restarted, AAudioService
needs to recreate shared buffer and the client needs to replace the new
shared buffer.
Test: atest AAudioTests
Test: test_steal_exclusive
Bug: 201000721
Bug: 196394385
Bug: 167345722
Bug: 208619472
Change-Id: Ib4f98e7aee72c2e56acd7f2f0ac378a94ec26241
diff --git a/media/libaaudio/src/binding/RingBufferParcelable.h b/media/libaaudio/src/binding/RingBufferParcelable.h
index 2508cea..29d0d86 100644
--- a/media/libaaudio/src/binding/RingBufferParcelable.h
+++ b/media/libaaudio/src/binding/RingBufferParcelable.h
@@ -46,15 +46,15 @@
int32_t dataMemoryOffset,
int32_t dataSizeInBytes);
- int32_t getBytesPerFrame();
+ int32_t getBytesPerFrame() const;
void setBytesPerFrame(int32_t bytesPerFrame);
- int32_t getFramesPerBurst();
+ int32_t getFramesPerBurst() const;
void setFramesPerBurst(int32_t framesPerBurst);
- int32_t getCapacityInFrames();
+ int32_t getCapacityInFrames() const;
void setCapacityInFrames(int32_t capacityInFrames);
@@ -62,6 +62,12 @@
aaudio_result_t resolve(SharedMemoryParcelable *memoryParcels, RingBufferDescriptor *descriptor);
+ void updateMemory(const RingBufferParcelable& parcelable);
+
+ int32_t getSharedMemoryIndex() const {
+ return mSharedMemoryIndex;
+ }
+
void dump();
// Extract a parcelable representation of this object.
@@ -71,6 +77,7 @@
SharedRegionParcelable mReadCounterParcelable;
SharedRegionParcelable mWriteCounterParcelable;
SharedRegionParcelable mDataParcelable;
+ int32_t mSharedMemoryIndex = -1;
int32_t mBytesPerFrame = 0; // index is in frames
int32_t mFramesPerBurst = 0; // for ISOCHRONOUS queues
int32_t mCapacityInFrames = 0; // zero if unused