audiopolicy: Add AudioSessionInfo API

 * This patch introduces a new API which allows applications to
   query the state of the audio effects system, and receive
   callbacks with the necessary information to attach effects
   to any stream.
 * In the future, this may come as part of the AudioPort system,
   but since that's an active area of development by Google, we
   will dodge it for now.
 * The policy now simply keeps a refcounted list of objects which
   hold various bits of stream metadata. Callbacks are sent on
   stream open/close to applications which might be listening
   for them.

Change-Id: I2d554d36e1378f4eb7b276010a3bfe8345c22ecd

1 files changed, 3 insertions, 0 deletions

diff --git a/include/media/IAudioPolicyServiceClient.h b/include/media/IAudioPolicyServiceClient.h
index a7f2cc3..ec38157 100644
--- a/include/media/IAudioPolicyServiceClient.h
+++ b/include/media/IAudioPolicyServiceClient.h
@@ -21,6 +21,7 @@
 #include <utils/RefBase.h>
 #include <binder/IInterface.h>
 #include <system/audio.h>
+#include <media/AudioSession.h>
 
 namespace android {
 
@@ -37,6 +38,8 @@ public:
     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;
+    // Notifies when a default effect set is attached to a session/stream
+    virtual void onOutputSessionEffectsUpdate(sp<AudioSessionInfo>& info, bool added) = 0;
 };