commit 3a34befc6fb04a4945a849e8bda8b84e4bf973fe
author Marco Nelissen <marcone@google.com> Tue Aug 02 13:33:41 2011 -0700
committer Marco Nelissen <marcone@google.com> Tue Aug 09 10:21:10 2011 -0700
tree 80dee67385fb78763b2c25f6dce9ed122bfd9aee
parent a1f10e8959cd4656aedb2613e855342102e59555

Keep effects sessions active when the caller dies.

Don't remove effects until the session they are in goes away or all
AudioEffects have been explicitly released. This allows the control
panel process to die without stopping the effects.

Change-Id: I4496e5df080230ca1af149dec95c1309ab8ea888

media/libmedia/IAudioFlinger.cpp

diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index 4a12962..d58834b 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -1,4 +1,4 @@
-/* //device/extlibs/pv/android/IAudioflinger.cpp
+/*
 **
 ** Copyright 2007, The Android Open Source Project
 **
@@ -63,6 +63,8 @@
     GET_RENDER_POSITION,
     GET_INPUT_FRAMES_LOST,
     NEW_AUDIO_SESSION_ID,
+    ACQUIRE_AUDIO_SESSION_ID,
+    RELEASE_AUDIO_SESSION_ID,
     QUERY_NUM_EFFECTS,
     QUERY_EFFECT,
     GET_EFFECT_DESCRIPTOR,
@@ -526,6 +528,22 @@
         return id;
     }
 
+    virtual void acquireAudioSessionId(int audioSession)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
+        data.writeInt32(audioSession);
+        remote()->transact(ACQUIRE_AUDIO_SESSION_ID, data, &reply);
+    }
+
+    virtual void releaseAudioSessionId(int audioSession)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
+        data.writeInt32(audioSession);
+        remote()->transact(RELEASE_AUDIO_SESSION_ID, data, &reply);
+    }
+
     virtual status_t queryNumberEffects(uint32_t *numEffects)
     {
         Parcel data, reply;
@@ -919,6 +937,18 @@
             reply->writeInt32(newAudioSessionId());
             return NO_ERROR;
         } break;
+        case ACQUIRE_AUDIO_SESSION_ID: {
+            CHECK_INTERFACE(IAudioFlinger, data, reply);
+            int audioSession = data.readInt32();
+            acquireAudioSessionId(audioSession);
+            return NO_ERROR;
+        } break;
+        case RELEASE_AUDIO_SESSION_ID: {
+            CHECK_INTERFACE(IAudioFlinger, data, reply);
+            int audioSession = data.readInt32();
+            releaseAudioSessionId(audioSession);
+            return NO_ERROR;
+        } break;
         case QUERY_NUM_EFFECTS: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
             uint32_t numEffects;