diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index dfc2066..fd86737 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -141,8 +141,8 @@
     static uint32_t getInputFramesLost(audio_io_handle_t ioHandle);
 
     static int newAudioSessionId();
-    static void acquireAudioSessionId(int audioSession);
-    static void releaseAudioSessionId(int audioSession);
+    static void acquireAudioSessionId(int audioSession, pid_t pid);
+    static void releaseAudioSessionId(int audioSession, pid_t pid);
 
     // types of io configuration change events received with ioConfigChanged()
     enum io_config_event {
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index 5a50280..d0df710 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -190,7 +190,8 @@
                                     int sessionId        = AUDIO_SESSION_ALLOCATE,
                                     transfer_type transferType = TRANSFER_DEFAULT,
                                     const audio_offload_info_t *offloadInfo = NULL,
-                                    int uid = -1);
+                                    int uid = -1,
+                                    pid_t pid = -1);
 
     /* Creates an audio track and registers it with AudioFlinger.
      * With this constructor, the track is configured for static buffer mode.
@@ -215,7 +216,8 @@
                                     int sessionId       = AUDIO_SESSION_ALLOCATE,
                                     transfer_type transferType = TRANSFER_DEFAULT,
                                     const audio_offload_info_t *offloadInfo = NULL,
-                                    int uid = -1);
+                                    int uid = -1,
+                                    pid_t pid = -1);
 
     /* Terminates the AudioTrack and unregisters it from AudioFlinger.
      * Also destroys all resources associated with the AudioTrack.
@@ -253,7 +255,8 @@
                             int sessionId       = AUDIO_SESSION_ALLOCATE,
                             transfer_type transferType = TRANSFER_DEFAULT,
                             const audio_offload_info_t *offloadInfo = NULL,
-                            int uid = -1);
+                            int uid = -1,
+                            pid_t pid = -1);
 
     /* Result of constructing the AudioTrack. This must be checked for successful initialization
      * before using any AudioTrack API (except for set()), because using
@@ -757,6 +760,7 @@
     sp<DeathNotifier>       mDeathNotifier;
     uint32_t                mSequence;              // incremented for each new IAudioTrack attempt
     int                     mClientUid;
+    pid_t                   mClientPid;
 };
 
 class TimedAudioTrack : public AudioTrack
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index ea225ac..7f53bfc 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -180,8 +180,8 @@
 
     virtual int newAudioSessionId() = 0;
 
-    virtual void acquireAudioSessionId(int audioSession) = 0;
-    virtual void releaseAudioSessionId(int audioSession) = 0;
+    virtual void acquireAudioSessionId(int audioSession, pid_t pid) = 0;
+    virtual void releaseAudioSessionId(int audioSession, pid_t pid) = 0;
 
     virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0;
 
diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index 541cb51..6ca499b 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -115,7 +115,7 @@
             mAudioRecord.clear();
         }
         IPCThreadState::self()->flushCommands();
-        AudioSystem::releaseAudioSessionId(mSessionId);
+        AudioSystem::releaseAudioSessionId(mSessionId, -1);
     }
 }
 
@@ -266,7 +266,7 @@
     mMarkerReached = false;
     mNewPosition = 0;
     mUpdatePeriod = 0;
-    AudioSystem::acquireAudioSessionId(mSessionId);
+    AudioSystem::acquireAudioSessionId(mSessionId, -1);
     mSequence = 1;
     mObservedSequence = mSequence;
     mInOverrun = false;
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 87f4b4c..140fb66 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -435,19 +435,19 @@
     return af->newAudioSessionId();
 }
 
-void AudioSystem::acquireAudioSessionId(int audioSession)
+void AudioSystem::acquireAudioSessionId(int audioSession, pid_t pid)
 {
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
     if (af != 0) {
-        af->acquireAudioSessionId(audioSession);
+        af->acquireAudioSessionId(audioSession, pid);
     }
 }
 
-void AudioSystem::releaseAudioSessionId(int audioSession)
+void AudioSystem::releaseAudioSessionId(int audioSession, pid_t pid)
 {
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
     if (af != 0) {
-        af->releaseAudioSessionId(audioSession);
+        af->releaseAudioSessionId(audioSession, pid);
     }
 }
 
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 63eaf1a..5c62260 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -116,7 +116,8 @@
         int sessionId,
         transfer_type transferType,
         const audio_offload_info_t *offloadInfo,
-        int uid)
+        int uid,
+        pid_t pid)
     : mStatus(NO_INIT),
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
@@ -125,7 +126,7 @@
     mStatus = set(streamType, sampleRate, format, channelMask,
             frameCount, flags, cbf, user, notificationFrames,
             0 /*sharedBuffer*/, false /*threadCanCallJava*/, sessionId, transferType,
-            offloadInfo, uid);
+            offloadInfo, uid, pid);
 }
 
 AudioTrack::AudioTrack(
@@ -141,7 +142,8 @@
         int sessionId,
         transfer_type transferType,
         const audio_offload_info_t *offloadInfo,
-        int uid)
+        int uid,
+        pid_t pid)
     : mStatus(NO_INIT),
       mIsTimed(false),
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
@@ -149,7 +151,8 @@
 {
     mStatus = set(streamType, sampleRate, format, channelMask,
             0 /*frameCount*/, flags, cbf, user, notificationFrames,
-            sharedBuffer, false /*threadCanCallJava*/, sessionId, transferType, offloadInfo, uid);
+            sharedBuffer, false /*threadCanCallJava*/, sessionId, transferType, offloadInfo,
+            uid, pid);
 }
 
 AudioTrack::~AudioTrack()
@@ -168,7 +171,9 @@
         mAudioTrack->asBinder()->unlinkToDeath(mDeathNotifier, this);
         mAudioTrack.clear();
         IPCThreadState::self()->flushCommands();
-        AudioSystem::releaseAudioSessionId(mSessionId);
+        ALOGV("~AudioTrack, releasing session id from %d on behalf of %d",
+                IPCThreadState::self()->getCallingPid(), mClientPid);
+        AudioSystem::releaseAudioSessionId(mSessionId, mClientPid);
     }
 }
 
@@ -187,7 +192,8 @@
         int sessionId,
         transfer_type transferType,
         const audio_offload_info_t *offloadInfo,
-        int uid)
+        int uid,
+        pid_t pid)
 {
     switch (transferType) {
     case TRANSFER_DEFAULT:
@@ -335,11 +341,18 @@
     mNotificationFramesReq = notificationFrames;
     mNotificationFramesAct = 0;
     mSessionId = sessionId;
-    if (uid == -1 || (IPCThreadState::self()->getCallingPid() != getpid())) {
+    int callingpid = IPCThreadState::self()->getCallingPid();
+    int mypid = getpid();
+    if (uid == -1 || (callingpid != mypid)) {
         mClientUid = IPCThreadState::self()->getCallingUid();
     } else {
         mClientUid = uid;
     }
+    if (pid == -1 || (callingpid != mypid)) {
+        mClientPid = callingpid;
+    } else {
+        mClientPid = pid;
+    }
     mAuxEffectId = 0;
     mFlags = flags;
     mCbf = cbf;
@@ -379,7 +392,7 @@
     mMarkerReached = false;
     mNewPosition = 0;
     mUpdatePeriod = 0;
-    AudioSystem::acquireAudioSessionId(mSessionId);
+    AudioSystem::acquireAudioSessionId(mSessionId, mClientPid);
     mSequence = 1;
     mObservedSequence = mSequence;
     mInUnderrun = false;
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index eef6a3d..7b15e68 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -609,19 +609,21 @@
         return id;
     }
 
-    virtual void acquireAudioSessionId(int audioSession)
+    virtual void acquireAudioSessionId(int audioSession, int pid)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
         data.writeInt32(audioSession);
+        data.writeInt32(pid);
         remote()->transact(ACQUIRE_AUDIO_SESSION_ID, data, &reply);
     }
 
-    virtual void releaseAudioSessionId(int audioSession)
+    virtual void releaseAudioSessionId(int audioSession, int pid)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
         data.writeInt32(audioSession);
+        data.writeInt32(pid);
         remote()->transact(RELEASE_AUDIO_SESSION_ID, data, &reply);
     }
 
@@ -1082,13 +1084,15 @@
         case ACQUIRE_AUDIO_SESSION_ID: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
             int audioSession = data.readInt32();
-            acquireAudioSessionId(audioSession);
+            int pid = data.readInt32();
+            acquireAudioSessionId(audioSession, pid);
             return NO_ERROR;
         } break;
         case RELEASE_AUDIO_SESSION_ID: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
             int audioSession = data.readInt32();
-            releaseAudioSessionId(audioSession);
+            int pid = data.readInt32();
+            releaseAudioSessionId(audioSession, pid);
             return NO_ERROR;
         } break;
         case QUERY_NUM_EFFECTS: {
diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index 24663ad..d94c7c5 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -58,7 +58,7 @@
     mVideoWidth = mVideoHeight = 0;
     mLockThreadId = 0;
     mAudioSessionId = AudioSystem::newAudioSessionId();
-    AudioSystem::acquireAudioSessionId(mAudioSessionId);
+    AudioSystem::acquireAudioSessionId(mAudioSessionId, -1);
     mSendLevel = 0;
     mRetransmitEndpointValid = false;
 }
@@ -66,7 +66,7 @@
 MediaPlayer::~MediaPlayer()
 {
     ALOGV("destructor");
-    AudioSystem::releaseAudioSessionId(mAudioSessionId);
+    AudioSystem::releaseAudioSessionId(mAudioSessionId, -1);
     disconnect();
     IPCThreadState::self()->flushCommands();
 }
@@ -576,8 +576,8 @@
         return BAD_VALUE;
     }
     if (sessionId != mAudioSessionId) {
-        AudioSystem::acquireAudioSessionId(sessionId);
-        AudioSystem::releaseAudioSessionId(mAudioSessionId);
+        AudioSystem::acquireAudioSessionId(sessionId, -1);
+        AudioSystem::releaseAudioSessionId(mAudioSessionId, -1);
         mAudioSessionId = sessionId;
     }
     return NO_ERROR;
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 1f70620..142788d 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -586,7 +586,8 @@
     }
 
     if (!p->hardwareOutput()) {
-        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid());
+        mAudioOutput = new AudioOutput(mAudioSessionId, IPCThreadState::self()->getCallingUid(),
+                mPid);
         static_cast<MediaPlayerInterface*>(p.get())->setAudioSink(mAudioOutput);
     }
 
@@ -1299,13 +1300,14 @@
 
 #undef LOG_TAG
 #define LOG_TAG "AudioSink"
-MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid)
+MediaPlayerService::AudioOutput::AudioOutput(int sessionId, int uid, int pid)
     : mCallback(NULL),
       mCallbackCookie(NULL),
       mCallbackData(NULL),
       mBytesWritten(0),
       mSessionId(sessionId),
       mUid(uid),
+      mPid(pid),
       mFlags(AUDIO_OUTPUT_FLAG_NONE) {
     ALOGV("AudioOutput(%d)", sessionId);
     mStreamType = AUDIO_STREAM_MUSIC;
@@ -1554,7 +1556,8 @@
                     mSessionId,
                     AudioTrack::TRANSFER_CALLBACK,
                     offloadInfo,
-                    mUid);
+                    mUid,
+                    mPid);
         } else {
             t = new AudioTrack(
                     mStreamType,
@@ -1569,7 +1572,8 @@
                     mSessionId,
                     AudioTrack::TRANSFER_DEFAULT,
                     NULL, // offload info
-                    mUid);
+                    mUid,
+                    mPid);
         }
 
         if ((t == 0) || (t->initCheck() != NO_ERROR)) {
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index fc355b0..448f27a 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -72,7 +72,7 @@
         class CallbackData;
 
      public:
-                                AudioOutput(int sessionId, int uid);
+                                AudioOutput(int sessionId, int uid, int pid);
         virtual                 ~AudioOutput();
 
         virtual bool            ready() const { return mTrack != 0; }
@@ -140,6 +140,7 @@
         float                   mMsecsPerFrame;
         int                     mSessionId;
         int                     mUid;
+        int                     mPid;
         float                   mSendLevel;
         int                     mAuxEffectId;
         static bool             mIsOnEmulator;
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 21bd2f4..b74fa89 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1929,18 +1929,21 @@
     return nextUniqueId();
 }
 
-void AudioFlinger::acquireAudioSessionId(int audioSession)
+void AudioFlinger::acquireAudioSessionId(int audioSession, pid_t pid)
 {
     Mutex::Autolock _l(mLock);
     pid_t caller = IPCThreadState::self()->getCallingPid();
-    ALOGV("acquiring %d from %d", audioSession, caller);
+    ALOGV("acquiring %d from %d, for %d", audioSession, caller, pid);
+    if (pid != -1 && (caller == getpid_cached)) {
+        caller = pid;
+    }
 
     // Ignore requests received from processes not known as notification client. The request
     // is likely proxied by mediaserver (e.g CameraService) and releaseAudioSessionId() can be
     // called from a different pid leaving a stale session reference.  Also we don't know how
     // to clear this reference if the client process dies.
     if (mNotificationClients.indexOfKey(caller) < 0) {
-        ALOGV("acquireAudioSessionId() unknown client %d for session %d", caller, audioSession);
+        ALOGW("acquireAudioSessionId() unknown client %d for session %d", caller, audioSession);
         return;
     }
 
@@ -1957,11 +1960,14 @@
     ALOGV(" added new entry for %d", audioSession);
 }
 
-void AudioFlinger::releaseAudioSessionId(int audioSession)
+void AudioFlinger::releaseAudioSessionId(int audioSession, pid_t pid)
 {
     Mutex::Autolock _l(mLock);
     pid_t caller = IPCThreadState::self()->getCallingPid();
-    ALOGV("releasing %d from %d", audioSession, caller);
+    ALOGV("releasing %d from %d for %d", audioSession, caller, pid);
+    if (pid != -1 && (caller == getpid_cached)) {
+        caller = pid;
+    }
     size_t num = mAudioSessionRefs.size();
     for (size_t i = 0; i< num; i++) {
         AudioSessionRef *ref = mAudioSessionRefs.itemAt(i);
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 459d2ec..4799beb 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -193,9 +193,9 @@
 
     virtual int newAudioSessionId();
 
-    virtual void acquireAudioSessionId(int audioSession);
+    virtual void acquireAudioSessionId(int audioSession, pid_t pid);
 
-    virtual void releaseAudioSessionId(int audioSession);
+    virtual void releaseAudioSessionId(int audioSession, pid_t pid);
 
     virtual status_t queryNumberEffects(uint32_t *numEffects) const;