audioflinger: implement pause/resume for direct outputs

Extend pause/resume support to direct output threads
(was only for offload threads).

If the HAL implements pause/resume, track pause/resume is forwarded to
the HAL.

Pause, flush, resume sequence is respected by executing the HAL
calls in the playback thread (same as offload).

Make sure the track flags on client side are consistent with the
flags on server side.

Bug: 17883772.
Change-Id: I89b360d69818f7a9204bd36e3ec63a79e106ecf1

1 files changed, 5 insertions, 4 deletions

diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 119e495..f5d0e27 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -809,7 +809,9 @@ public:
 protected:
                 // accessed by both binder threads and within threadLoop(), lock on mutex needed
                 unsigned    mFastTrackAvailMask;    // bit i set if fast track [i] is available
-
+                bool        mHwSupportsPause;
+                bool        mHwPaused;
+                bool        mFlushPending;
 private:
     // timestamp latch:
     //  D input is written by threadLoop_write while mutex is unlocked, and read while locked
@@ -910,6 +912,8 @@ protected:
     virtual     mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove);
     virtual     void        threadLoop_mix();
     virtual     void        threadLoop_sleepTime();
+    virtual     void        threadLoop_exit();
+    virtual     bool        shouldStandby_l();
 
     // volumes last sent to audio HAL with stream->set_volume()
     float mLeftVolFloat;
@@ -940,12 +944,9 @@ protected:
 
     virtual     bool        waitingAsyncCallback();
     virtual     bool        waitingAsyncCallback_l();
-    virtual     bool        shouldStandby_l();
     virtual     void        onAddNewTrack_l();
 
 private:
-    bool        mHwPaused;
-    bool        mFlushPending;
     size_t      mPausedWriteLength;     // length in bytes of write interrupted by pause
     size_t      mPausedBytesRemaining;  // bytes still waiting in mixbuffer after resume
     wp<Track>   mPreviousTrack;         // used to detect track switch