diff --git a/include/ui/Camera.h b/include/ui/Camera.h
index e3544ab..afb07b5 100644
--- a/include/ui/Camera.h
+++ b/include/ui/Camera.h
@@ -18,6 +18,7 @@
 #ifndef ANDROID_HARDWARE_CAMERA_H
 #define ANDROID_HARDWARE_CAMERA_H
 
+#include <utils/Timers.h>
 #include <ui/ICameraClient.h>
 
 namespace android {
@@ -94,6 +95,7 @@
 public:
     virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
     virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0;
+    virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
 };
 
 class Camera : public BnCameraClient, public IBinder::DeathRecipient
@@ -155,6 +157,7 @@
     // ICameraClient interface
     virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
     virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr);
+    virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
 
     sp<ICamera>         remote();
 
diff --git a/include/ui/CameraHardwareInterface.h b/include/ui/CameraHardwareInterface.h
index 73036f0..822b4a8 100644
--- a/include/ui/CameraHardwareInterface.h
+++ b/include/ui/CameraHardwareInterface.h
@@ -28,7 +28,7 @@
 typedef void (*preview_callback)(const sp<IMemory>& mem, void* user);
 
 /** Callback for startRecord() */
-typedef void (*recording_callback)(const sp<IMemory>& mem, void* user);
+typedef void (*recording_callback)(nsecs_t timestamp, const sp<IMemory>& mem, void* user);
 
 /** Callback for takePicture() */
 typedef void (*shutter_callback)(void* user);
diff --git a/include/ui/ICameraClient.h b/include/ui/ICameraClient.h
index c4bdd07..1001c71 100644
--- a/include/ui/ICameraClient.h
+++ b/include/ui/ICameraClient.h
@@ -21,6 +21,7 @@
 #include <utils/IInterface.h>
 #include <utils/Parcel.h>
 #include <utils/IMemory.h>
+#include <utils/Timers.h>
 
 namespace android {
 
@@ -31,7 +32,7 @@
 
     virtual void            notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
     virtual void            dataCallback(int32_t msgType, const sp<IMemory>& data) = 0;
-
+    virtual void            dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& data) = 0;
 };
 
 // ----------------------------------------------------------------------------