audioflinger: keep wakelock during offload playback
Add a system property ro.audio.offload_wakelock to select
if a wakelock should be kept during offload playback while waiting for
write completion callback.
The default is yes, keep the wakelock.
On some platforms, the cost of entering or exiting suspend is so high
that is it better to not release a wakelock at all rather than releasing
it periodically.
Bug: 26208297
Change-Id: Ib41c7e4ed9c8c0c063363eb9fe99a2ecc81b521b
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 761fc71..cf896e0 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -527,6 +527,8 @@
// ThreadBase virtuals
virtual void preExit();
+ virtual bool keepWakeLock() const { return true; }
+
public:
virtual status_t initCheck() const { return (mOutput == NULL) ? NO_INIT : NO_ERROR; }
@@ -996,9 +998,12 @@
virtual bool waitingAsyncCallback();
virtual bool waitingAsyncCallback_l();
+ virtual bool keepWakeLock() const { return mKeepWakeLock; }
+
private:
size_t mPausedWriteLength; // length in bytes of write interrupted by pause
size_t mPausedBytesRemaining; // bytes still waiting in mixbuffer after resume
+ bool mKeepWakeLock; // keep wake lock while waiting for write callback
};
class AsyncCallbackThread : public Thread {