AudioSystem callback for dynamic policy mix activity

Add method to AudioPolicyServiceClient for dynamic policy mix
 activity notification.
Propagate notification to a dedicated callback.

Bug 20226914

Change-Id: I37928ed38e15ea2b8fed022cccadeca8c4d6c876

1 files changed, 13 insertions, 6 deletions

diff --git a/include/media/AudioPolicy.h b/include/media/AudioPolicy.h
index 800b27b..feed402 100644
--- a/include/media/AudioPolicy.h
+++ b/include/media/AudioPolicy.h
@@ -38,14 +38,17 @@ namespace android {
 #define MIX_TYPE_PLAYERS 0
 #define MIX_TYPE_RECORDERS 1
 
+// definition of the different events that can be reported on a dynamic policy from
+//   AudioSystem's implementation of the AudioPolicyClient interface
+// keep in sync with AudioSystem.java
+#define DYNAMIC_POLICY_EVENT_MIX_STATE_UPDATE 0
+
 #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 MIX_ROUTE_FLAG_RENDER 0x1
+#define MIX_ROUTE_FLAG_LOOP_BACK (0x1 << 1)
 
 #define MAX_MIXES_PER_POLICY 10
 #define MAX_CRITERIA_PER_MIX 20
@@ -67,11 +70,15 @@ public:
 
 class AudioMix {
 public:
+    // flag on an AudioMix indicating the activity on this mix (IDLE, MIXING)
+    //   must be reported through the AudioPolicyClient interface
+    static const uint32_t kCbFlagNotifyActivity = 0x1;
+
     AudioMix() {}
     AudioMix(Vector<AttributeMatchCriterion> criteria, uint32_t mixType, audio_config_t format,
              uint32_t routeFlags, String8 registrationId, uint32_t flags) :
         mCriteria(criteria), mMixType(mixType), mFormat(format),
-        mRouteFlags(routeFlags), mRegistrationId(registrationId), mFlags(flags){}
+        mRouteFlags(routeFlags), mRegistrationId(registrationId), mCbFlags(flags){}
 
     status_t readFromParcel(Parcel *parcel);
     status_t writeToParcel(Parcel *parcel) const;
@@ -81,7 +88,7 @@ public:
     audio_config_t  mFormat;
     uint32_t        mRouteFlags;
     String8         mRegistrationId;
-    uint32_t        mFlags;
+    uint32_t        mCbFlags; // flags indicating which callbacks to use, see kCbFlag*
 };
 
 }; // namespace android