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, 6 insertions, 0 deletions

diff --git a/services/audiopolicy/service/AudioPolicyClientImpl.cpp b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
index 489a9be..82720f4 100644
--- a/services/audiopolicy/service/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
@@ -219,6 +219,12 @@ void AudioPolicyService::AudioPolicyClient::onDynamicPolicyMixStateUpdate(
     mAudioPolicyService->onDynamicPolicyMixStateUpdate(regId, state);
 }
 
+void AudioPolicyService::AudioPolicyClient::onOutputSessionEffectsUpdate(
+        sp<AudioSessionInfo>& info, bool added)
+{
+    mAudioPolicyService->onOutputSessionEffectsUpdate(info, added);
+}
+
 audio_unique_id_t AudioPolicyService::AudioPolicyClient::newAudioUniqueId()
 {
     return AudioSystem::newAudioUniqueId();