audioflinger: Adjust priority of hal threads
HALs are prohibited from using framework binder, and there is
no equivalent scheduling policy service in hwbinder. Thus, in order
to match priorities of FastCapture / Mixer threads with their
counterparts in the HAL, it is needed to request the priority boost
from audioflinger on behalf of the HAL.
Test done to verify the priority was correctly set.
Bug: 34131400
Change-Id: If8b6b031c0fcba771fae901a5b8e7da89b3a1570
Test: check priority match between audioflinger's and hal's threads
diff --git a/media/libaudiohal/StreamHalHidl.h b/media/libaudiohal/StreamHalHidl.h
index db217a8..a7df276 100644
--- a/media/libaudiohal/StreamHalHidl.h
+++ b/media/libaudiohal/StreamHalHidl.h
@@ -101,10 +101,12 @@
// The destructor automatically closes the stream.
virtual ~StreamHalHidl();
- int mHalThreadPriority;
+ bool requestHalThreadPriority(pid_t threadPid, pid_t threadId);
private:
+ const int HAL_THREAD_PRIORITY_DEFAULT = -1;
IStream *mStream;
+ int mHalThreadPriority;
};
class StreamOutHalHidl : public StreamOutHalInterface, public StreamHalHidl {