AudioPolicyManager: notification of dynamic policy mix activity

Implement non-stream type specific ref counting in output
  descriptors to keep track of mix activity.
Notify audio policy client of mix activity changes.

Bug 20226914

Change-Id: Iec939cb640c58056f88947b611d23b4bb6d8a11b

3 files changed, 12 insertions, 2 deletions

diff --git a/include/media/AudioPolicy.h b/include/media/AudioPolicy.h
index a755e1e..800b27b 100644
--- a/include/media/AudioPolicy.h
+++ b/include/media/AudioPolicy.h
@@ -38,9 +38,15 @@ namespace android {
 #define MIX_TYPE_PLAYERS 0
 #define MIX_TYPE_RECORDERS 1
 
+#define MIX_STATE_DISABLED -1
+#define MIX_STATE_IDLE 0
+#define MIX_STATE_MIXING 1
+
 #define ROUTE_FLAG_RENDER 0x1
 #define ROUTE_FLAG_LOOP_BACK (0x1 << 1)
 
+#define MIX_FLAG_NOTIFY_ACTIVITY 0x1
+
 #define MAX_MIXES_PER_POLICY 10
 #define MAX_CRITERIA_PER_MIX 20
 
@@ -63,9 +69,9 @@ class AudioMix {
 public:
     AudioMix() {}
     AudioMix(Vector<AttributeMatchCriterion> criteria, uint32_t mixType, audio_config_t format,
-             uint32_t routeFlags, String8 registrationId) :
+             uint32_t routeFlags, String8 registrationId, uint32_t flags) :
         mCriteria(criteria), mMixType(mixType), mFormat(format),
-        mRouteFlags(routeFlags), mRegistrationId(registrationId) {}
+        mRouteFlags(routeFlags), mRegistrationId(registrationId), mFlags(flags){}
 
     status_t readFromParcel(Parcel *parcel);
     status_t writeToParcel(Parcel *parcel) const;
@@ -75,6 +81,7 @@ public:
     audio_config_t  mFormat;
     uint32_t        mRouteFlags;
     String8         mRegistrationId;
+    uint32_t        mFlags;
 };
 
 }; // namespace android
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 3b6db8c..927283c 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -384,6 +384,7 @@ private:
         // IAudioPolicyServiceClient
         virtual void onAudioPortListUpdate();
         virtual void onAudioPatchListUpdate();
+        virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state);
 
     private:
         Mutex                               mLock;
diff --git a/include/media/IAudioPolicyServiceClient.h b/include/media/IAudioPolicyServiceClient.h
index 59df046..a7f2cc3 100644
--- a/include/media/IAudioPolicyServiceClient.h
+++ b/include/media/IAudioPolicyServiceClient.h
@@ -35,6 +35,8 @@ public:
     virtual void onAudioPortListUpdate() = 0;
     // Notifies a change of audio patch configuration.
     virtual void onAudioPatchListUpdate() = 0;
+    // Notifies a change in the mixing state of a specific mix in a dynamic audio policy
+    virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state) = 0;
 };