diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index cb7678b..c399691 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -33,6 +33,8 @@
 #include <system/audio.h>
 
 #include <audio_utils/primitives.h>
+#include <common_time/local_clock.h>
+#include <common_time/cc_helper.h>
 
 #include "AudioMixer.h"
 
@@ -45,6 +47,9 @@
 {
     // AudioMixer is not yet capable of multi-channel beyond stereo
     assert(2 == MAX_NUM_CHANNELS);
+    
+    LocalClock lc;
+
     mState.enabledTracks= 0;
     mState.needsChanged = 0;
     mState.frameCount   = frameCount;
@@ -80,6 +85,7 @@
         t->sampleRate = mSampleRate;
         t->mainBuffer = NULL;
         t->auxBuffer = NULL;
+        t->localTimeFreq = lc.getLocalFreq();
         t++;
     }
 }
@@ -289,6 +295,7 @@
             if (resampler == NULL) {
                 resampler = AudioResampler::create(
                         format, channelCount, devSampleRate);
+                resampler->setLocalTimeFreq(localTimeFreq);
             }
             return true;
         }
@@ -333,13 +340,13 @@
 
 
 
-void AudioMixer::process()
+void AudioMixer::process(int64_t pts)
 {
-    mState.hook(&mState);
+    mState.hook(&mState, pts);
 }
 
 
-void AudioMixer::process__validate(state_t* state)
+void AudioMixer::process__validate(state_t* state, int64_t pts)
 {
     ALOGW_IF(!state->needsChanged,
         "in process__validate() but nothing's invalid");
@@ -443,7 +450,7 @@
         countActiveTracks, state->enabledTracks,
         all16BitsStereoNoResample, resampling, volumeRamp);
 
-    state->hook(state);
+   state->hook(state, pts);
 
     // Now that the volume ramp has been done, set optimal state and
     // track hooks for subsequent mixer process
@@ -757,7 +764,7 @@
 }
 
 // no-op case
-void AudioMixer::process__nop(state_t* state)
+void AudioMixer::process__nop(state_t* state, int64_t pts)
 {
     uint32_t e0 = state->enabledTracks;
     size_t bufSize = state->frameCount * sizeof(int16_t) * MAX_NUM_CHANNELS;
@@ -787,7 +794,9 @@
             size_t outFrames = state->frameCount;
             while (outFrames) {
                 t1.buffer.frameCount = outFrames;
-                t1.bufferProvider->getNextBuffer(&t1.buffer);
+                int64_t outputPTS = calculateOutputPTS(
+                    t1, pts, state->frameCount - outFrames);
+                t1.bufferProvider->getNextBuffer(&t1.buffer, outputPTS);
                 if (t1.buffer.raw == NULL) break;
                 outFrames -= t1.buffer.frameCount;
                 t1.bufferProvider->releaseBuffer(&t1.buffer);
@@ -797,7 +806,7 @@
 }
 
 // generic code without resampling
-void AudioMixer::process__genericNoResampling(state_t* state)
+void AudioMixer::process__genericNoResampling(state_t* state, int64_t pts)
 {
     int32_t outTemp[BLOCKSIZE * MAX_NUM_CHANNELS] __attribute__((aligned(32)));
 
@@ -809,7 +818,7 @@
         e0 &= ~(1<<i);
         track_t& t = state->tracks[i];
         t.buffer.frameCount = state->frameCount;
-        t.bufferProvider->getNextBuffer(&t.buffer);
+        t.bufferProvider->getNextBuffer(&t.buffer, pts);
         t.frameCount = t.buffer.frameCount;
         t.in = t.buffer.raw;
         // t.in == NULL can happen if the track was flushed just after having
@@ -863,7 +872,9 @@
                     if (t.frameCount == 0 && outFrames) {
                         t.bufferProvider->releaseBuffer(&t.buffer);
                         t.buffer.frameCount = (state->frameCount - numFrames) - (BLOCKSIZE - outFrames);
-                        t.bufferProvider->getNextBuffer(&t.buffer);
+                        int64_t outputPTS = calculateOutputPTS(
+                            t, pts, numFrames + (BLOCKSIZE - outFrames));
+                        t.bufferProvider->getNextBuffer(&t.buffer, outputPTS);
                         t.in = t.buffer.raw;
                         if (t.in == NULL) {
                             enabledTracks &= ~(1<<i);
@@ -892,7 +903,7 @@
 
 
 // generic code with resampling
-void AudioMixer::process__genericResampling(state_t* state)
+void AudioMixer::process__genericResampling(state_t* state, int64_t pts)
 {
     // this const just means that local variable outTemp doesn't change
     int32_t* const outTemp = state->outputTemp;
@@ -932,6 +943,7 @@
             // acquire/release the buffers because it's done by
             // the resampler.
             if ((t.needs & NEEDS_RESAMPLE__MASK) == NEEDS_RESAMPLE_ENABLED) {
+                t.resampler->setPTS(pts);
                 (t.hook)(&t, outTemp, numFrames, state->resampleTemp, aux);
             } else {
 
@@ -939,7 +951,8 @@
 
                 while (outFrames < numFrames) {
                     t.buffer.frameCount = numFrames - outFrames;
-                    t.bufferProvider->getNextBuffer(&t.buffer);
+                    int64_t outputPTS = calculateOutputPTS(t, pts, outFrames);
+                    t.bufferProvider->getNextBuffer(&t.buffer, outputPTS);
                     t.in = t.buffer.raw;
                     // t.in == NULL can happen if the track was flushed just after having
                     // been enabled for mixing.
@@ -959,7 +972,8 @@
 }
 
 // one track, 16 bits stereo without resampling is the most common case
-void AudioMixer::process__OneTrack16BitsStereoNoResampling(state_t* state)
+void AudioMixer::process__OneTrack16BitsStereoNoResampling(state_t* state,
+                                                           int64_t pts)
 {
     // This method is only called when state->enabledTracks has exactly
     // one bit set.  The asserts below would verify this, but are commented out
@@ -979,7 +993,8 @@
     const uint32_t vrl = t.volumeRL;
     while (numFrames) {
         b.frameCount = numFrames;
-        t.bufferProvider->getNextBuffer(&b);
+        int64_t outputPTS = calculateOutputPTS(t, pts, out - t.mainBuffer);
+        t.bufferProvider->getNextBuffer(&b, outputPTS);
         const int16_t *in = b.i16;
 
         // in == NULL can happen if the track was flushed just after having
@@ -1023,7 +1038,8 @@
 // 2 tracks is also a common case
 // NEVER used in current implementation of process__validate()
 // only use if the 2 tracks have the same output buffer
-void AudioMixer::process__TwoTracks16BitsStereoNoResampling(state_t* state)
+void AudioMixer::process__TwoTracks16BitsStereoNoResampling(state_t* state,
+                                                            int64_t pts)
 {
     int i;
     uint32_t en = state->enabledTracks;
@@ -1057,7 +1073,9 @@
 
         if (frameCount0 == 0) {
             b0.frameCount = numFrames;
-            t0.bufferProvider->getNextBuffer(&b0);
+            int64_t outputPTS = calculateOutputPTS(t0, pts,
+                                                   out - t0.mainBuffer);
+            t0.bufferProvider->getNextBuffer(&b0, outputPTS);
             if (b0.i16 == NULL) {
                 if (buff == NULL) {
                     buff = new int16_t[MAX_NUM_CHANNELS * state->frameCount];
@@ -1071,7 +1089,9 @@
         }
         if (frameCount1 == 0) {
             b1.frameCount = numFrames;
-            t1.bufferProvider->getNextBuffer(&b1);
+            int64_t outputPTS = calculateOutputPTS(t1, pts,
+                                                   out - t0.mainBuffer);
+            t1.bufferProvider->getNextBuffer(&b1, outputPTS);
             if (b1.i16 == NULL) {
                 if (buff == NULL) {
                     buff = new int16_t[MAX_NUM_CHANNELS * state->frameCount];
@@ -1117,5 +1137,14 @@
 }
 #endif
 
+int64_t AudioMixer::calculateOutputPTS(const track_t& t, int64_t basePTS,
+                                       int outputFrameIndex)
+{
+    if (AudioBufferProvider::kInvalidPTS == basePTS)
+        return AudioBufferProvider::kInvalidPTS;
+
+    return basePTS + ((outputFrameIndex * t.localTimeFreq) / t.sampleRate);
+}
+
 // ----------------------------------------------------------------------------
 }; // namespace android