diff --git a/cmds/stagefright/stagefright.cpp b/cmds/stagefright/stagefright.cpp
index 148b66e..ad68a21 100644
--- a/cmds/stagefright/stagefright.cpp
+++ b/cmds/stagefright/stagefright.cpp
@@ -22,7 +22,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "jpeg.h"
 #include "SineSource.h"
@@ -821,7 +820,7 @@
         CHECK(service.get() != NULL);
 
         sp<IMediaMetadataRetriever> retriever =
-            service->createMetadataRetriever(getpid());
+            service->createMetadataRetriever();
 
         CHECK(retriever != NULL);
 
diff --git a/cmds/stagefright/stream.cpp b/cmds/stagefright/stream.cpp
index 7329dcc..af6afe0 100644
--- a/cmds/stagefright/stream.cpp
+++ b/cmds/stagefright/stream.cpp
@@ -370,7 +370,7 @@
     }
 
     sp<IMediaPlayer> player =
-        service->create(getpid(), client, 0);
+        service->create(client, 0);
 
     if (player != NULL && player->setDataSource(source) == NO_ERROR) {
         player->setVideoSurfaceTexture(surface->getSurfaceTexture());
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index 9727143..9c3067e 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -56,7 +56,6 @@
      * return null if the track cannot be created.
      */
     virtual sp<IAudioTrack> createTrack(
-                                pid_t pid,
                                 audio_stream_type_t streamType,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -70,7 +69,6 @@
                                 status_t *status) = 0;
 
     virtual sp<IAudioRecord> openRecord(
-                                pid_t pid,
                                 audio_io_handle_t input,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -174,7 +172,7 @@
     virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID,
                                         effect_descriptor_t *pDescriptor) const = 0;
 
-    virtual sp<IEffect> createEffect(pid_t pid,
+    virtual sp<IEffect> createEffect(
                                     effect_descriptor_t *pDesc,
                                     const sp<IEffectClient>& client,
                                     int32_t priority,
diff --git a/include/media/IMediaPlayerService.h b/include/media/IMediaPlayerService.h
index 7a89135..44db5bc 100644
--- a/include/media/IMediaPlayerService.h
+++ b/include/media/IMediaPlayerService.h
@@ -44,9 +44,9 @@
 public:
     DECLARE_META_INTERFACE(MediaPlayerService);
 
-    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid) = 0;
-    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid) = 0;
-    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId = 0) = 0;
+    virtual sp<IMediaRecorder> createMediaRecorder() = 0;
+    virtual sp<IMediaMetadataRetriever> createMetadataRetriever() = 0;
+    virtual sp<IMediaPlayer> create(const sp<IMediaPlayerClient>& client, int audioSessionId = 0) = 0;
 
     virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat) = 0;
     virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat) = 0;
diff --git a/media/libmedia/AudioEffect.cpp b/media/libmedia/AudioEffect.cpp
index 3317d57..8dfffb3 100644
--- a/media/libmedia/AudioEffect.cpp
+++ b/media/libmedia/AudioEffect.cpp
@@ -127,7 +127,7 @@
 
     mIEffectClient = new EffectClient(this);
 
-    iEffect = audioFlinger->createEffect(getpid(), &mDescriptor,
+    iEffect = audioFlinger->createEffect((effect_descriptor_t *)&mDescriptor,
             mIEffectClient, priority, io, mSessionId, &mStatus, &mId, &enabled);
 
     if (iEffect == 0 || (mStatus != NO_ERROR && mStatus != ALREADY_EXISTS)) {
diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index c2ef68c..3db69a4 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -444,7 +444,7 @@
     // FIXME see similar logic at AudioTrack
 
     int originalSessionId = mSessionId;
-    sp<IAudioRecord> record = audioFlinger->openRecord(getpid(), input,
+    sp<IAudioRecord> record = audioFlinger->openRecord(input,
                                                        sampleRate, format,
                                                        mChannelMask,
                                                        frameCount,
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 1d87ff8..d0872f0 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -837,8 +837,7 @@
         }
     }
 
-    sp<IAudioTrack> track = audioFlinger->createTrack(getpid(),
-                                                      streamType,
+    sp<IAudioTrack> track = audioFlinger->createTrack(streamType,
                                                       sampleRate,
                                                       // AudioFlinger only sees 16-bit PCM
                                                       format == AUDIO_FORMAT_PCM_8_BIT ?
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index c5fbbf0..2f18680 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -84,7 +84,6 @@
     }
 
     virtual sp<IAudioTrack> createTrack(
-                                pid_t pid,
                                 audio_stream_type_t streamType,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -100,7 +99,6 @@
         Parcel data, reply;
         sp<IAudioTrack> track;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32(pid);
         data.writeInt32((int32_t) streamType);
         data.writeInt32(sampleRate);
         data.writeInt32(format);
@@ -138,7 +136,6 @@
     }
 
     virtual sp<IAudioRecord> openRecord(
-                                pid_t pid,
                                 audio_io_handle_t input,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -152,7 +149,6 @@
         Parcel data, reply;
         sp<IAudioRecord> record;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32(pid);
         data.writeInt32((int32_t) input);
         data.writeInt32(sampleRate);
         data.writeInt32(format);
@@ -612,7 +608,7 @@
         return NO_ERROR;
     }
 
-    virtual sp<IEffect> createEffect(pid_t pid,
+    virtual sp<IEffect> createEffect(
                                     effect_descriptor_t *pDesc,
                                     const sp<IEffectClient>& client,
                                     int32_t priority,
@@ -633,7 +629,6 @@
         }
 
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32(pid);
         data.write(pDesc, sizeof(effect_descriptor_t));
         data.writeStrongBinder(client->asBinder());
         data.writeInt32(priority);
@@ -712,7 +707,6 @@
     switch (code) {
         case CREATE_TRACK: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
-            pid_t pid = data.readInt32();
             int streamType = data.readInt32();
             uint32_t sampleRate = data.readInt32();
             audio_format_t format = (audio_format_t) data.readInt32();
@@ -724,7 +718,7 @@
             pid_t tid = (pid_t) data.readInt32();
             int sessionId = data.readInt32();
             status_t status;
-            sp<IAudioTrack> track = createTrack(pid,
+            sp<IAudioTrack> track = createTrack(
                     (audio_stream_type_t) streamType, sampleRate, format,
                     channelMask, frameCount, &flags, buffer, output, tid, &sessionId, &status);
             reply->writeInt32(flags);
@@ -735,7 +729,6 @@
         } break;
         case OPEN_RECORD: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
-            pid_t pid = data.readInt32();
             audio_io_handle_t input = (audio_io_handle_t) data.readInt32();
             uint32_t sampleRate = data.readInt32();
             audio_format_t format = (audio_format_t) data.readInt32();
@@ -745,7 +738,7 @@
             pid_t tid = (pid_t) data.readInt32();
             int sessionId = data.readInt32();
             status_t status;
-            sp<IAudioRecord> record = openRecord(pid, input,
+            sp<IAudioRecord> record = openRecord(input,
                     sampleRate, format, channelMask, frameCount, flags, tid, &sessionId, &status);
             reply->writeInt32(sessionId);
             reply->writeInt32(status);
@@ -1021,7 +1014,6 @@
         }
         case CREATE_EFFECT: {
             CHECK_INTERFACE(IAudioFlinger, data, reply);
-            pid_t pid = data.readInt32();
             effect_descriptor_t desc;
             data.read(&desc, sizeof(effect_descriptor_t));
             sp<IEffectClient> client = interface_cast<IEffectClient>(data.readStrongBinder());
@@ -1032,7 +1024,7 @@
             int id;
             int enabled;
 
-            sp<IEffect> effect = createEffect(pid, &desc, client, priority, output, sessionId,
+            sp<IEffect> effect = createEffect(&desc, client, priority, output, sessionId,
                     &status, &id, &enabled);
             reply->writeInt32(status);
             reply->writeInt32(id);
diff --git a/media/libmedia/IMediaPlayerService.cpp b/media/libmedia/IMediaPlayerService.cpp
index c0a0260..ae76c10 100644
--- a/media/libmedia/IMediaPlayerService.cpp
+++ b/media/libmedia/IMediaPlayerService.cpp
@@ -56,20 +56,18 @@
     {
     }
 
-    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
+    virtual sp<IMediaMetadataRetriever> createMetadataRetriever()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
-        data.writeInt32(pid);
         remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
         return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
     }
 
     virtual sp<IMediaPlayer> create(
-            pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId) {
+            const sp<IMediaPlayerClient>& client, int audioSessionId) {
         Parcel data, reply;
         data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
-        data.writeInt32(pid);
         data.writeStrongBinder(client->asBinder());
         data.writeInt32(audioSessionId);
 
@@ -77,11 +75,10 @@
         return interface_cast<IMediaPlayer>(reply.readStrongBinder());
     }
 
-    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
+    virtual sp<IMediaRecorder> createMediaRecorder()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
-        data.writeInt32(pid);
         remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
         return interface_cast<IMediaRecorder>(reply.readStrongBinder());
     }
@@ -168,11 +165,10 @@
     switch (code) {
         case CREATE: {
             CHECK_INTERFACE(IMediaPlayerService, data, reply);
-            pid_t pid = data.readInt32();
             sp<IMediaPlayerClient> client =
                 interface_cast<IMediaPlayerClient>(data.readStrongBinder());
             int audioSessionId = data.readInt32();
-            sp<IMediaPlayer> player = create(pid, client, audioSessionId);
+            sp<IMediaPlayer> player = create(client, audioSessionId);
             reply->writeStrongBinder(player->asBinder());
             return NO_ERROR;
         } break;
@@ -206,15 +202,13 @@
         } break;
         case CREATE_MEDIA_RECORDER: {
             CHECK_INTERFACE(IMediaPlayerService, data, reply);
-            pid_t pid = data.readInt32();
-            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
+            sp<IMediaRecorder> recorder = createMediaRecorder();
             reply->writeStrongBinder(recorder->asBinder());
             return NO_ERROR;
         } break;
         case CREATE_METADATA_RETRIEVER: {
             CHECK_INTERFACE(IMediaPlayerService, data, reply);
-            pid_t pid = data.readInt32();
-            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
+            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever();
             reply->writeStrongBinder(retriever->asBinder());
             return NO_ERROR;
         } break;
diff --git a/media/libmedia/mediametadataretriever.cpp b/media/libmedia/mediametadataretriever.cpp
index b0241aa..110b94c 100644
--- a/media/libmedia/mediametadataretriever.cpp
+++ b/media/libmedia/mediametadataretriever.cpp
@@ -64,7 +64,7 @@
         ALOGE("failed to obtain MediaMetadataRetrieverService");
         return;
     }
-    sp<IMediaMetadataRetriever> retriever(service->createMetadataRetriever(getpid()));
+    sp<IMediaMetadataRetriever> retriever(service->createMetadataRetriever());
     if (retriever == 0) {
         ALOGE("failed to create IMediaMetadataRetriever object from server");
     }
diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index bbbf4b6..dbff8dc 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -143,7 +143,7 @@
     if (url != NULL) {
         const sp<IMediaPlayerService>& service(getMediaPlayerService());
         if (service != 0) {
-            sp<IMediaPlayer> player(service->create(getpid(), this, mAudioSessionId));
+            sp<IMediaPlayer> player(service->create(this, mAudioSessionId));
             if ((NO_ERROR != doSetRetransmitEndpoint(player)) ||
                 (NO_ERROR != player->setDataSource(url, headers))) {
                 player.clear();
@@ -160,7 +160,7 @@
     status_t err = UNKNOWN_ERROR;
     const sp<IMediaPlayerService>& service(getMediaPlayerService());
     if (service != 0) {
-        sp<IMediaPlayer> player(service->create(getpid(), this, mAudioSessionId));
+        sp<IMediaPlayer> player(service->create(this, mAudioSessionId));
         if ((NO_ERROR != doSetRetransmitEndpoint(player)) ||
             (NO_ERROR != player->setDataSource(fd, offset, length))) {
             player.clear();
@@ -176,7 +176,7 @@
     status_t err = UNKNOWN_ERROR;
     const sp<IMediaPlayerService>& service(getMediaPlayerService());
     if (service != 0) {
-        sp<IMediaPlayer> player(service->create(getpid(), this, mAudioSessionId));
+        sp<IMediaPlayer> player(service->create(this, mAudioSessionId));
         if ((NO_ERROR != doSetRetransmitEndpoint(player)) ||
             (NO_ERROR != player->setDataSource(source))) {
             player.clear();
diff --git a/media/libmedia/mediarecorder.cpp b/media/libmedia/mediarecorder.cpp
index 9541015..46a8f54 100644
--- a/media/libmedia/mediarecorder.cpp
+++ b/media/libmedia/mediarecorder.cpp
@@ -620,7 +620,7 @@
 
     const sp<IMediaPlayerService>& service(getMediaPlayerService());
     if (service != NULL) {
-        mMediaRecorder = service->createMediaRecorder(getpid());
+        mMediaRecorder = service->createMediaRecorder();
     }
     if (mMediaRecorder != NULL) {
         mCurrentState = MEDIA_RECORDER_IDLE;
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index c3e5c40..c211072 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -224,8 +224,9 @@
     ALOGV("MediaPlayerService destroyed");
 }
 
-sp<IMediaRecorder> MediaPlayerService::createMediaRecorder(pid_t pid)
+sp<IMediaRecorder> MediaPlayerService::createMediaRecorder()
 {
+    pid_t pid = IPCThreadState::self()->getCallingPid();
     sp<MediaRecorderClient> recorder = new MediaRecorderClient(this, pid);
     wp<MediaRecorderClient> w = recorder;
     Mutex::Autolock lock(mLock);
@@ -241,16 +242,18 @@
     ALOGV("Delete media recorder client");
 }
 
-sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever(pid_t pid)
+sp<IMediaMetadataRetriever> MediaPlayerService::createMetadataRetriever()
 {
+    pid_t pid = IPCThreadState::self()->getCallingPid();
     sp<MetadataRetrieverClient> retriever = new MetadataRetrieverClient(pid);
     ALOGV("Create new media retriever from pid %d", pid);
     return retriever;
 }
 
-sp<IMediaPlayer> MediaPlayerService::create(pid_t pid, const sp<IMediaPlayerClient>& client,
+sp<IMediaPlayer> MediaPlayerService::create(const sp<IMediaPlayerClient>& client,
         int audioSessionId)
 {
+    pid_t pid = IPCThreadState::self()->getCallingPid();
     int32_t connId = android_atomic_inc(&mNextConnId);
 
     sp<Client> c = new Client(
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index fd648df..a8af66e 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -239,11 +239,11 @@
     static  void                instantiate();
 
     // IMediaPlayerService interface
-    virtual sp<IMediaRecorder>  createMediaRecorder(pid_t pid);
+    virtual sp<IMediaRecorder>  createMediaRecorder();
     void    removeMediaRecorderClient(wp<MediaRecorderClient> client);
-    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid);
+    virtual sp<IMediaMetadataRetriever> createMetadataRetriever();
 
-    virtual sp<IMediaPlayer>    create(pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId);
+    virtual sp<IMediaPlayer>    create(const sp<IMediaPlayerClient>& client, int audioSessionId);
 
     virtual sp<IMemory>         decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
     virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
diff --git a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
index b913124..558fd41 100644
--- a/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
+++ b/media/libstagefright/wifi-display/sink/TunnelRenderer.cpp
@@ -370,7 +370,7 @@
 
     mPlayerClient = new PlayerClient;
 
-    mPlayer = service->create(getpid(), mPlayerClient, 0);
+    mPlayer = service->create(mPlayerClient, 0);
     CHECK(mPlayer != NULL);
     CHECK_EQ(mPlayer->setDataSource(mStreamSource), (status_t)OK);
 
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 514fcb1..5f5b041 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -344,7 +344,6 @@
 
 
 sp<IAudioTrack> AudioFlinger::createTrack(
-        pid_t pid,
         audio_stream_type_t streamType,
         uint32_t sampleRate,
         audio_format_t format,
@@ -389,6 +388,7 @@
             goto Exit;
         }
 
+        pid_t pid = IPCThreadState::self()->getCallingPid();
         client = registerPid_l(pid);
 
         ALOGV("createTrack() sessionId: %d", (sessionId == NULL) ? -2 : *sessionId);
@@ -1120,7 +1120,6 @@
 // ----------------------------------------------------------------------------
 
 sp<IAudioRecord> AudioFlinger::openRecord(
-        pid_t pid,
         audio_io_handle_t input,
         uint32_t sampleRate,
         audio_format_t format,
@@ -1154,6 +1153,7 @@
             goto Exit;
         }
 
+        pid_t pid = IPCThreadState::self()->getCallingPid();
         client = registerPid_l(pid);
 
         // If no audio session id is provided, create one here
@@ -1877,7 +1877,7 @@
 }
 
 
-sp<IEffect> AudioFlinger::createEffect(pid_t pid,
+sp<IEffect> AudioFlinger::createEffect(
         effect_descriptor_t *pDesc,
         const sp<IEffectClient>& effectClient,
         int32_t priority,
@@ -1891,6 +1891,7 @@
     sp<EffectHandle> handle;
     effect_descriptor_t desc;
 
+    pid_t pid = IPCThreadState::self()->getCallingPid();
     ALOGV("createEffect pid %d, effectClient %p, priority %d, sessionId %d, io %d",
             pid, effectClient.get(), priority, sessionId, io);
 
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 6d3f0a1..a28f47e 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -92,7 +92,6 @@
 
     // IAudioFlinger interface, in binder opcode order
     virtual sp<IAudioTrack> createTrack(
-                                pid_t pid,
                                 audio_stream_type_t streamType,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -106,7 +105,6 @@
                                 status_t *status);
 
     virtual sp<IAudioRecord> openRecord(
-                                pid_t pid,
                                 audio_io_handle_t input,
                                 uint32_t sampleRate,
                                 audio_format_t format,
@@ -197,7 +195,7 @@
     virtual status_t getEffectDescriptor(const effect_uuid_t *pUuid,
                                          effect_descriptor_t *descriptor) const;
 
-    virtual sp<IEffect> createEffect(pid_t pid,
+    virtual sp<IEffect> createEffect(
                         effect_descriptor_t *pDesc,
                         const sp<IEffectClient>& effectClient,
                         int32_t priority,