TimedEventQueue: improve wakelock management

Do not acquire a wakelock unless the event is delayed by more
than a given time. This prevents from acquiring/releasing
wakelocks too often which has adverse effects on performance.

Bug: 11509471.
Change-Id: Id06803b393b40c4db5095a6e7ec02339fa581a38

1 files changed, 3 insertions, 1 deletions

diff --git a/media/libstagefright/include/TimedEventQueue.h b/media/libstagefright/include/TimedEventQueue.h
index 4e49c83..38a08b1 100644
--- a/media/libstagefright/include/TimedEventQueue.h
+++ b/media/libstagefright/include/TimedEventQueue.h
@@ -118,6 +118,7 @@ private:
     struct QueueItem {
         sp<Event> event;
         int64_t realtime_us;
+        bool has_wakelock;
     };
 
     struct StopEvent : public TimedEventQueue::Event {
@@ -139,6 +140,7 @@ private:
     sp<IPowerManager>       mPowerManager;
     sp<IBinder>             mWakeLockToken;
     const sp<PMDeathRecipient> mDeathRecipient;
+    uint32_t                mWakeLockCount;
 
     static void *ThreadWrapper(void *me);
     void threadEntry();
@@ -146,7 +148,7 @@ private:
     sp<Event> removeEventFromQueue_l(event_id id);
 
     void acquireWakeLock_l();
-    void releaseWakeLock_l();
+    void releaseWakeLock_l(bool force = false);
 
     TimedEventQueue(const TimedEventQueue &);
     TimedEventQueue &operator=(const TimedEventQueue &);