aaudio: stop buzzing when MMAP stream disconnected
When a stream is disconnected, clear the MMAP memory
buffer to prevent the hardware from looping on stale data
and making a buzzing sound.
Bug: 63342351
Test: play GStomper with AAudio through headphones and then unplug them
Change-Id: I6372b0a031dea242e3830cc2d226a4c043d4467e
diff --git a/media/libaaudio/src/fifo/FifoBuffer.cpp b/media/libaaudio/src/fifo/FifoBuffer.cpp
index 8d2c62d..a869886 100644
--- a/media/libaaudio/src/fifo/FifoBuffer.cpp
+++ b/media/libaaudio/src/fifo/FifoBuffer.cpp
@@ -210,3 +210,9 @@
return mFifo->getCapacity();
}
+void FifoBuffer::eraseMemory() {
+ int32_t numBytes = convertFramesToBytes(getBufferCapacityInFrames());
+ if (numBytes > 0) {
+ memset(mStorage, 0, (size_t) numBytes);
+ }
+}