diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index b42bf54..42bb4df 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -222,6 +222,17 @@
 
     static status_t setVoiceVolume(float volume);
 
+    // return the number of audio frames written by AudioFlinger to audio HAL and
+    // audio dsp to DAC since the output on which the specificed stream is playing
+    // has exited standby.
+    // returned status (from utils/Errors.h) can be:
+    // - NO_ERROR: successful operation, halFrames and dspFrames point to valid data
+    // - INVALID_OPERATION: Not supported on current hardware platform
+    // - BAD_VALUE: invalid parameter
+    // NOTE: this feature is not supported on all hardware platforms and it is
+    // necessary to check returned status before using the returned values.
+    static status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream = DEFAULT);
+
     //
     // AudioPolicyService interface
     //
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index b689dcbc..bddd23e 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -130,6 +130,7 @@
     virtual status_t setStreamOutput(uint32_t stream, int output) = 0;
 
     virtual status_t setVoiceVolume(float volume) = 0;
+    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output) = 0;
 };
 
 
diff --git a/include/media/MediaPlayerInterface.h b/include/media/MediaPlayerInterface.h
index 6575da6..588c51a 100644
--- a/include/media/MediaPlayerInterface.h
+++ b/include/media/MediaPlayerInterface.h
@@ -72,6 +72,7 @@
         virtual ssize_t     frameSize() const = 0;
         virtual uint32_t    latency() const = 0;
         virtual float       msecsPerFrame() const = 0;
+        virtual status_t    getPosition(uint32_t *position) = 0;
 
         // If no callback is specified, use the "write" API below to submit
         // audio data. Otherwise return a full buffer of audio data on each
diff --git a/libs/audioflinger/A2dpAudioInterface.cpp b/libs/audioflinger/A2dpAudioInterface.cpp
index c07bbfe..747d0e4 100644
--- a/libs/audioflinger/A2dpAudioInterface.cpp
+++ b/libs/audioflinger/A2dpAudioInterface.cpp
@@ -457,4 +457,10 @@
     return NO_ERROR;
 }
 
+status_t A2dpAudioInterface::A2dpAudioStreamOut::getRenderPosition(uint32_t *driverFrames)
+{
+    //TODO: enable when supported by driver
+    return INVALID_OPERATION;
+}
+
 }; // namespace android
diff --git a/libs/audioflinger/A2dpAudioInterface.h b/libs/audioflinger/A2dpAudioInterface.h
index 530e432..48154f9 100644
--- a/libs/audioflinger/A2dpAudioInterface.h
+++ b/libs/audioflinger/A2dpAudioInterface.h
@@ -93,6 +93,7 @@
         virtual status_t    dump(int fd, const Vector<String16>& args);
         virtual status_t    setParameters(const String8& keyValuePairs);
         virtual String8     getParameters(const String8& keys);
+        virtual status_t    getRenderPosition(uint32_t *dspFrames);
 
     private:
         friend class A2dpAudioInterface;
diff --git a/libs/audioflinger/AudioDumpInterface.cpp b/libs/audioflinger/AudioDumpInterface.cpp
index 858e5aa..30e2bc9 100644
--- a/libs/audioflinger/AudioDumpInterface.cpp
+++ b/libs/audioflinger/AudioDumpInterface.cpp
@@ -379,6 +379,12 @@
     }
 }
 
+status_t AudioStreamOutDump::getRenderPosition(uint32_t *dspFrames)
+{
+    if (mFinalStream != 0 ) return mFinalStream->getRenderPosition(dspFrames);
+    return INVALID_OPERATION;
+}
+
 // ----------------------------------------------------------------------------
 
 AudioStreamInDump::AudioStreamInDump(AudioDumpInterface *interface,
diff --git a/libs/audioflinger/AudioDumpInterface.h b/libs/audioflinger/AudioDumpInterface.h
index 1136ce1..5b9a6b1 100644
--- a/libs/audioflinger/AudioDumpInterface.h
+++ b/libs/audioflinger/AudioDumpInterface.h
@@ -56,8 +56,9 @@
     void                Close(void);
     AudioStreamOut*     finalStream() { return mFinalStream; }
     uint32_t            device() { return mDevice; }
-
     int                 getId()  { return mId; }
+    virtual status_t    getRenderPosition(uint32_t *dspFrames);
+
 private:
     AudioDumpInterface *mInterface;
     int                  mId;
diff --git a/libs/audioflinger/AudioFlinger.cpp b/libs/audioflinger/AudioFlinger.cpp
index 5c58603..cad420a 100644
--- a/libs/audioflinger/AudioFlinger.cpp
+++ b/libs/audioflinger/AudioFlinger.cpp
@@ -633,6 +633,20 @@
     return ret;
 }
 
+status_t AudioFlinger::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output)
+{
+    status_t status;
+
+    Mutex::Autolock _l(mLock);
+
+    PlaybackThread *playbackThread = checkPlaybackThread_l(output);
+    if (playbackThread != NULL) {
+        return playbackThread->getRenderPosition(halFrames, dspFrames);
+    }
+
+    return BAD_VALUE;
+}
+
 void AudioFlinger::registerClient(const sp<IAudioFlingerClient>& client)
 {
 
@@ -1166,6 +1180,19 @@
     memset(mMixBuffer, 0, mFrameCount * 2 * sizeof(int16_t));
 }
 
+status_t AudioFlinger::PlaybackThread::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames)
+{
+    if (halFrames == 0 || dspFrames == 0) {
+        return BAD_VALUE;
+    }
+    if (mOutput == 0) {
+        return INVALID_OPERATION;
+    }
+    *halFrames = mBytesWritten/mOutput->frameSize();
+
+    return mOutput->getRenderPosition(dspFrames);
+}
+
 // ----------------------------------------------------------------------------
 
 AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id)
@@ -1290,8 +1317,9 @@
         if (sleepTime == 0) {
             mLastWriteTime = systemTime();
             mInWrite = true;
+            mBytesWritten += mixBufferSize;
             int bytesWritten = (int)mOutput->write(curBuf, mixBufferSize);
-            if (bytesWritten > 0) mBytesWritten += bytesWritten;
+            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
             mNumWrites++;
             mInWrite = false;
             nsecs_t now = systemTime();
@@ -1812,8 +1840,9 @@
         if (sleepTime == 0) {
             mLastWriteTime = systemTime();
             mInWrite = true;
+            mBytesWritten += mixBufferSize;
             int bytesWritten = (int)mOutput->write(mMixBuffer, mixBufferSize);
-            if (bytesWritten) mBytesWritten += bytesWritten;
+            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
             mNumWrites++;
             mInWrite = false;
             mStandby = false;
diff --git a/libs/audioflinger/AudioFlinger.h b/libs/audioflinger/AudioFlinger.h
index 52999b1..44da9ed 100644
--- a/libs/audioflinger/AudioFlinger.h
+++ b/libs/audioflinger/AudioFlinger.h
@@ -136,6 +136,8 @@
 
     virtual status_t setVoiceVolume(float volume);
 
+    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output);
+
     // IBinder::DeathRecipient
     virtual     void        binderDied(const wp<IBinder>& who);
 
@@ -526,6 +528,7 @@
                     bool        isSuspended() { return (mSuspended != 0); }
         virtual     String8     getParameters(const String8& keys);
         virtual     void        audioConfigChanged(int event, int param = 0);
+        virtual     status_t    getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames);
 
         struct  stream_type_t {
             stream_type_t()
diff --git a/libs/audioflinger/AudioHardwareGeneric.cpp b/libs/audioflinger/AudioHardwareGeneric.cpp
index 57874f3..d63c031 100644
--- a/libs/audioflinger/AudioHardwareGeneric.cpp
+++ b/libs/audioflinger/AudioHardwareGeneric.cpp
@@ -298,6 +298,11 @@
     return param.toString();
 }
 
+status_t AudioStreamOutGeneric::getRenderPosition(uint32_t *dspFrames)
+{
+    return INVALID_OPERATION;
+}
+
 // ----------------------------------------------------------------------------
 
 // record functions
@@ -310,9 +315,8 @@
         uint32_t *pRate,
         AudioSystem::audio_in_acoustics acoustics)
 {
-    // FIXME: remove logging
     if (pFormat == 0 || pChannels == 0 || pRate == 0) return BAD_VALUE;
-    LOGD("AudioStreamInGeneric::set(%p, %d, %d, %d, %u)", hw, fd, *pFormat, *pChannels, *pRate);
+    LOGV("AudioStreamInGeneric::set(%p, %d, %d, %d, %u)", hw, fd, *pFormat, *pChannels, *pRate);
     // check values
     if ((*pFormat != format()) ||
         (*pChannels != channels()) ||
@@ -332,14 +336,10 @@
 
 AudioStreamInGeneric::~AudioStreamInGeneric()
 {
-    // FIXME: remove logging
-    LOGD("AudioStreamInGeneric destructor");
 }
 
 ssize_t AudioStreamInGeneric::read(void* buffer, ssize_t bytes)
 {
-    // FIXME: remove logging
-    LOGD("AudioStreamInGeneric::read(%p, %d) from fd %d", buffer, (int)bytes, mFd);
     AutoMutex lock(mLock);
     if (mFd < 0) {
         LOGE("Attempt to read from unopened device");
diff --git a/libs/audioflinger/AudioHardwareGeneric.h b/libs/audioflinger/AudioHardwareGeneric.h
index 42da413..95c7ea3 100644
--- a/libs/audioflinger/AudioHardwareGeneric.h
+++ b/libs/audioflinger/AudioHardwareGeneric.h
@@ -55,6 +55,7 @@
     virtual status_t    dump(int fd, const Vector<String16>& args);
     virtual status_t    setParameters(const String8& keyValuePairs);
     virtual String8     getParameters(const String8& keys);
+    virtual status_t    getRenderPosition(uint32_t *dspFrames);
 
 private:
     AudioHardwareGeneric *mAudioHardware;
diff --git a/libs/audioflinger/AudioHardwareStub.cpp b/libs/audioflinger/AudioHardwareStub.cpp
index ae391ee..ae215d1 100644
--- a/libs/audioflinger/AudioHardwareStub.cpp
+++ b/libs/audioflinger/AudioHardwareStub.cpp
@@ -158,6 +158,11 @@
     return param.toString();
 }
 
+status_t AudioStreamOutStub::getRenderPosition(uint32_t *dspFrames)
+{
+    return INVALID_OPERATION;
+}
+
 // ----------------------------------------------------------------------------
 
 status_t AudioStreamInStub::set(int *pFormat, uint32_t *pChannels, uint32_t *pRate,
diff --git a/libs/audioflinger/AudioHardwareStub.h b/libs/audioflinger/AudioHardwareStub.h
index 583f852..769ae3f 100644
--- a/libs/audioflinger/AudioHardwareStub.h
+++ b/libs/audioflinger/AudioHardwareStub.h
@@ -41,6 +41,7 @@
     virtual status_t    dump(int fd, const Vector<String16>& args);
     virtual status_t    setParameters(const String8& keyValuePairs) { return NO_ERROR;}
     virtual String8     getParameters(const String8& keys);
+    virtual status_t    getRenderPosition(uint32_t *dspFrames);
 };
 
 class AudioStreamInStub : public AudioStreamIn {
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index e3b829b..c5dfbb5 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -342,6 +342,18 @@
     return af->setVoiceVolume(value);
 }
 
+status_t AudioSystem::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream)
+{
+    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
+    if (af == 0) return PERMISSION_DENIED;
+
+    if (stream == DEFAULT) {
+        stream = MUSIC;
+    }
+
+    return af->getRenderPosition(halFrames, dspFrames, getOutput((stream_type)stream));
+}
+
 // ---------------------------------------------------------------------------
 
 void AudioSystem::AudioFlingerClient::binderDied(const wp<IBinder>& who) {
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index fc42979..ca3a2a6 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -60,7 +60,8 @@
     OPEN_INPUT,
     CLOSE_INPUT,
     SET_STREAM_OUTPUT,
-    SET_VOICE_VOLUME
+    SET_VOICE_VOLUME,
+    GET_RENDER_POSITION
 };
 
 class BpAudioFlinger : public BpInterface<IAudioFlinger>
@@ -466,6 +467,26 @@
         remote()->transact(SET_VOICE_VOLUME, data, &reply);
         return reply.readInt32();
     }
+
+    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
+        data.writeInt32(output);
+        remote()->transact(GET_RENDER_POSITION, data, &reply);
+        status_t status = reply.readInt32();
+        if (status == NO_ERROR) {
+            uint32_t tmp = reply.readInt32();
+            if (halFrames) {
+                *halFrames = tmp;
+            }
+            tmp = reply.readInt32();
+            if (dspFrames) {
+                *dspFrames = tmp;
+            }
+        }
+        return status;
+    }
 };
 
 IMPLEMENT_META_INTERFACE(AudioFlinger, "android.media.IAudioFlinger");
@@ -718,6 +739,19 @@
             reply->writeInt32( setVoiceVolume(volume) );
             return NO_ERROR;
         } break;
+        case GET_RENDER_POSITION: {
+            CHECK_INTERFACE(IAudioFlinger, data, reply);
+            int output = data.readInt32();
+            uint32_t halFrames;
+            uint32_t dspFrames;
+            status_t status = getRenderPosition(&halFrames, &dspFrames, output);
+            reply->writeInt32(status);
+            if (status == NO_ERROR) {
+                reply->writeInt32(halFrames);
+                reply->writeInt32(dspFrames);
+            }
+            return NO_ERROR;
+        }
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index af8d1b5..5b061b1 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -1432,6 +1432,12 @@
     return mMsecsPerFrame;
 }
 
+status_t MediaPlayerService::AudioOutput::getPosition(uint32_t *position)
+{
+    if (mTrack == 0) return NO_INIT;
+    return mTrack->getPosition(position);
+}
+
 status_t MediaPlayerService::AudioOutput::open(
         uint32_t sampleRate, int channelCount, int format, int bufferCount,
         AudioCallback cb, void *cookie)
@@ -1613,6 +1619,13 @@
     return mMsecsPerFrame;
 }
 
+status_t MediaPlayerService::AudioCache::getPosition(uint32_t *position)
+{
+    if (position == 0) return BAD_VALUE;
+    *position = mSize;
+    return NO_ERROR;
+}
+
 status_t MediaPlayerService::AudioCache::open(
         uint32_t sampleRate, int channelCount, int format, int bufferCount,
         AudioCallback cb, void *cookie)
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index d1206b4..d243b96 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -76,6 +76,7 @@
         virtual ssize_t         frameSize() const;
         virtual uint32_t        latency() const;
         virtual float           msecsPerFrame() const;
+        virtual status_t        getPosition(uint32_t *position);
 
         virtual status_t        open(
                 uint32_t sampleRate, int channelCount,
@@ -130,6 +131,7 @@
         virtual ssize_t         frameSize() const { return ssize_t(mChannelCount * ((mFormat == AudioSystem::PCM_16_BIT)?sizeof(int16_t):sizeof(u_int8_t))); }
         virtual uint32_t        latency() const;
         virtual float           msecsPerFrame() const;
+        virtual status_t        getPosition(uint32_t *position);
 
         virtual status_t        open(
                 uint32_t sampleRate, int channelCount, int format,