reduce number of binder calls from mediaserver

Reduce the number of audio port, audio patch and
IO config changed binder calls from mediaserver to
client processes:
- Do not call IO config changed callback if selected
device is the same as previously selected one on a given
audio flinger playback or capture thread.
- Do not call the audio port or audo patch list update
callback on a client if this client as no listener registered.

Bug: 22045560.

Change-Id: If780e105404de79b7cb5c80c27b793ceb6b1c423

1 files changed, 4 insertions, 0 deletions

diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index eb50cdd..a0d5aa2 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -185,6 +185,8 @@ public:
 
     virtual void registerClient(const sp<IAudioPolicyServiceClient>& client);
 
+    virtual void setAudioPortCallbacksEnabled(bool enabled);
+
     virtual status_t acquireSoundTriggerSession(audio_session_t *session,
                                            audio_io_handle_t *ioHandle,
                                            audio_devices_t *device);
@@ -507,6 +509,7 @@ private:
                             void      onAudioPortListUpdate();
                             void      onAudioPatchListUpdate();
                             void      onDynamicPolicyMixStateUpdate(String8 regId, int32_t state);
+                            void      setAudioPortCallbacksEnabled(bool enabled);
 
                 // IBinder::DeathRecipient
                 virtual     void        binderDied(const wp<IBinder>& who);
@@ -518,6 +521,7 @@ private:
         const wp<AudioPolicyService>        mService;
         const uid_t                         mUid;
         const sp<IAudioPolicyServiceClient> mAudioPolicyServiceClient;
+              bool                          mAudioPortCallbacksEnabled;
     };
 
     // Internal dump utilities.