diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index eaf7780..abd7754 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2007 The Android Open Source Project
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ * Not a contribution.
+ * Copyright (C) 2007 The Android Open Source Project.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,6 +26,8 @@
 #include <utils/RefBase.h>
 #include <utils/Errors.h>
 #include <binder/IInterface.h>
+#include <media/IDirectTrack.h>
+#include <media/IDirectTrackClient.h>
 #include <media/IAudioTrack.h>
 #include <media/IAudioRecord.h>
 #include <media/IAudioFlingerClient.h>
@@ -50,6 +54,7 @@
         TRACK_TIMED   = 1,  // client requests a TimedAudioTrack
         TRACK_FAST    = 2,  // client requests a fast AudioTrack or AudioRecord
         TRACK_OFFLOAD = 4,  // client requests offload to hw codec
+        TRACK_VOICE_COMMUNICATION = 8, //client uses voice communication
     };
     typedef uint32_t track_flags_t;
 
@@ -76,6 +81,19 @@
                                 String8& name,
                                 status_t *status) = 0;
 
+    /* create a direct audio track and registers it with AudioFlinger.
+     * return null if the track cannot be created.
+     */
+    virtual sp<IDirectTrack> createDirectTrack(
+                                pid_t pid,
+                                uint32_t sampleRate,
+                                audio_channel_mask_t channelMask,
+                                audio_io_handle_t output,
+                                int *sessionId,
+                                IDirectTrackClient* client,
+                                audio_stream_type_t streamType,
+                                status_t *status) = 0;
+
     virtual sp<IAudioRecord> openRecord(
                                 audio_io_handle_t input,
                                 uint32_t sampleRate,