AudioTrack: get/setStartThresholdInFrames
setStartThresholdInFrames is used to set the start threshold
in frames for streaming AudioTrack playback.
Normally this is the entire buffer capacity in frames
but may be reduced for low latency playback,
compressed formats, and direct tracks.
Test: atest AudioTrackTest#testStartThresholdInFrames
Test: atest AudioTrackTest#testStartThresholdInFramesExceptions
Bug: 183003720
Change-Id: Iae10764130160de2380477134df27c5b139468bc
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h
index 9cabd8b..200e92d 100644
--- a/include/private/media/AudioTrackShared.h
+++ b/include/private/media/AudioTrackShared.h
@@ -182,6 +182,7 @@
// This is set by AudioTrack.setBufferSizeInFrames().
// A write will not fill the buffer above this limit.
volatile uint32_t mBufferSizeInFrames; // effective size of the buffer
+ volatile uint32_t mStartThresholdInFrames; // min frames in buffer to start streaming
public:
@@ -216,6 +217,8 @@
};
size_t frameCount() const { return mFrameCount; }
+ uint32_t getStartThresholdInFrames() const;
+ uint32_t setStartThresholdInFrames(uint32_t startThresholdInFrames);
protected:
// These refer to shared memory, and are virtual addresses with respect to the current process.