diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index cfce40d..1fbfc2b 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -20,8 +20,10 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
+#include <gui/IConsumerListener.h>
 #include <gui/IGraphicBufferAlloc.h>
 #include <gui/IGraphicBufferProducer.h>
+#include <gui/IGraphicBufferConsumer.h>
 
 #include <ui/Fence.h>
 #include <ui/GraphicBuffer.h>
@@ -33,7 +35,7 @@
 namespace android {
 // ----------------------------------------------------------------------------
 
-class BufferQueue : public BnGraphicBufferProducer {
+class BufferQueue : public BnGraphicBufferProducer, public BnGraphicBufferConsumer {
 public:
     enum { MIN_UNDEQUEUED_BUFFERS = 2 };
     enum { NUM_BUFFER_SLOTS = 32 };
@@ -45,31 +47,8 @@
     // producer and consumer can run asynchronously.
     enum { MAX_MAX_ACQUIRED_BUFFERS = NUM_BUFFER_SLOTS - 2 };
 
-    // ConsumerListener is the interface through which the BufferQueue notifies
-    // the consumer of events that the consumer may wish to react to.  Because
-    // the consumer will generally have a mutex that is locked during calls from
-    // the consumer to the BufferQueue, these calls from the BufferQueue to the
-    // consumer *MUST* be called only when the BufferQueue mutex is NOT locked.
-    struct ConsumerListener : public virtual RefBase {
-        // onFrameAvailable is called from queueBuffer each time an additional
-        // frame becomes available for consumption. This means that frames that
-        // are queued while in asynchronous mode only trigger the callback if no
-        // previous frames are pending. Frames queued while in synchronous mode
-        // always trigger the callback.
-        //
-        // This is called without any lock held and can be called concurrently
-        // by multiple threads.
-        virtual void onFrameAvailable() = 0;
-
-        // onBuffersReleased is called to notify the buffer consumer that the
-        // BufferQueue has released its references to one or more GraphicBuffers
-        // contained in its slots.  The buffer consumer should then call
-        // BufferQueue::getReleasedBuffers to retrieve the list of buffers
-        //
-        // This is called without any lock held and can be called concurrently
-        // by multiple threads.
-        virtual void onBuffersReleased() = 0;
-    };
+    // for backward source compatibility
+    typedef ::android::ConsumerListener ConsumerListener;
 
     // ProxyConsumerListener is a ConsumerListener implementation that keeps a weak
     // reference to the actual consumer object.  It forwards all calls to that
@@ -80,19 +59,16 @@
     // reference in the BufferQueue class is because we're planning to expose the
     // consumer side of a BufferQueue as a binder interface, which doesn't support
     // weak references.
-    class ProxyConsumerListener : public BufferQueue::ConsumerListener {
+    class ProxyConsumerListener : public BnConsumerListener {
     public:
-
-        ProxyConsumerListener(const wp<BufferQueue::ConsumerListener>& consumerListener);
+        ProxyConsumerListener(const wp<ConsumerListener>& consumerListener);
         virtual ~ProxyConsumerListener();
         virtual void onFrameAvailable();
         virtual void onBuffersReleased();
-
     private:
-
-        // mConsumerListener is a weak reference to the ConsumerListener.  This is
+        // mConsumerListener is a weak reference to the IConsumerListener.  This is
         // the raison d'etre of ProxyConsumerListener.
-        wp<BufferQueue::ConsumerListener> mConsumerListener;
+        wp<ConsumerListener> mConsumerListener;
     };
 
 
@@ -102,6 +78,14 @@
     BufferQueue(const sp<IGraphicBufferAlloc>& allocator = NULL);
     virtual ~BufferQueue();
 
+    // dump our state in a String
+    virtual void dump(String8& result) const;
+    virtual void dump(String8& result, const char* prefix) const;
+
+    /*
+     * IGraphicBufferProducer interface
+     */
+
     // Query native window attributes.  The "what" values are enumerated in
     // window.h (e.g. NATIVE_WINDOW_FORMAT).
     virtual int query(int what, int* value);
@@ -216,62 +200,9 @@
     // connected to the specified producer API.
     virtual status_t disconnect(int api);
 
-    // dump our state in a String
-    virtual void dump(String8& result) const;
-    virtual void dump(String8& result, const char* prefix) const;
-
-    // public facing structure for BufferSlot
-    struct BufferItem {
-
-        BufferItem() :
-           mTransform(0),
-           mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
-           mTimestamp(0),
-           mFrameNumber(0),
-           mBuf(INVALID_BUFFER_SLOT),
-           mIsDroppable(false),
-           mAcquireCalled(false) {
-             mCrop.makeInvalid();
-        }
-        // mGraphicBuffer points to the buffer allocated for this slot, or is NULL
-        // if the buffer in this slot has been acquired in the past (see
-        // BufferSlot.mAcquireCalled).
-        sp<GraphicBuffer> mGraphicBuffer;
-
-        // mCrop is the current crop rectangle for this buffer slot.
-        Rect mCrop;
-
-        // mTransform is the current transform flags for this buffer slot.
-        uint32_t mTransform;
-
-        // mScalingMode is the current scaling mode for this buffer slot.
-        uint32_t mScalingMode;
-
-        // mTimestamp is the current timestamp for this buffer slot. This gets
-        // to set by queueBuffer each time this slot is queued.
-        int64_t mTimestamp;
-
-        // mFrameNumber is the number of the queued frame for this slot.
-        uint64_t mFrameNumber;
-
-        // mBuf is the slot index of this buffer
-        int mBuf;
-
-        // mFence is a fence that will signal when the buffer is idle.
-        sp<Fence> mFence;
-
-        // mIsDroppable whether this buffer was queued with the
-        // property that it can be replaced by a new buffer for the purpose of
-        // making sure dequeueBuffer() won't block.
-        // i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer
-        // was queued.
-        bool mIsDroppable;
-
-        // Indicates whether this buffer has been seen by a consumer yet
-        bool mAcquireCalled;
-    };
-
-    // The following public functions are the consumer-facing interface
+    /*
+     * IGraphicBufferConsumer interface
+     */
 
     // acquireBuffer attempts to acquire ownership of the next pending buffer in
     // the BufferQueue.  If no buffer is pending then it returns -EINVAL.  If a
@@ -286,7 +217,7 @@
     // future, the buffer won't be acquired, and PRESENT_LATER will be
     // returned.  The presentation time is in nanoseconds, and the time base
     // is CLOCK_MONOTONIC.
-    status_t acquireBuffer(BufferItem *buffer, nsecs_t presentWhen);
+    virtual status_t acquireBuffer(BufferItem *buffer, nsecs_t presentWhen);
 
     // releaseBuffer releases a buffer slot from the consumer back to the
     // BufferQueue.  This may be done while the buffer's contents are still
@@ -300,7 +231,7 @@
     //
     // Note that the dependencies on EGL will be removed once we switch to using
     // the Android HW Sync HAL.
-    status_t releaseBuffer(int buf, uint64_t frameNumber,
+    virtual status_t releaseBuffer(int buf, uint64_t frameNumber,
             EGLDisplay display, EGLSyncKHR fence,
             const sp<Fence>& releaseFence);
 
@@ -312,25 +243,25 @@
     // the application.
     //
     // consumer may not be NULL.
-    status_t consumerConnect(const sp<ConsumerListener>& consumer, bool controlledByApp);
+    virtual status_t consumerConnect(const sp<IConsumerListener>& consumer, bool controlledByApp);
 
     // consumerDisconnect disconnects a consumer from the BufferQueue. All
     // buffers will be freed and the BufferQueue is placed in the "abandoned"
     // state, causing most interactions with the BufferQueue by the producer to
     // fail.
-    status_t consumerDisconnect();
+    virtual status_t consumerDisconnect();
 
     // getReleasedBuffers sets the value pointed to by slotMask to a bit mask
     // indicating which buffer slots have been released by the BufferQueue
     // but have not yet been released by the consumer.
     //
     // This should be called from the onBuffersReleased() callback.
-    status_t getReleasedBuffers(uint32_t* slotMask);
+    virtual status_t getReleasedBuffers(uint32_t* slotMask);
 
     // setDefaultBufferSize is used to set the size of buffers returned by
     // dequeueBuffer when a width and height of zero is requested.  Default
     // is 1x1.
-    status_t setDefaultBufferSize(uint32_t w, uint32_t h);
+    virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h);
 
     // setDefaultMaxBufferCount sets the default value for the maximum buffer
     // count (the initial default is 2). If the producer has requested a
@@ -338,38 +269,38 @@
     // take effect if the producer sets the count back to zero.
     //
     // The count must be between 2 and NUM_BUFFER_SLOTS, inclusive.
-    status_t setDefaultMaxBufferCount(int bufferCount);
+    virtual status_t setDefaultMaxBufferCount(int bufferCount);
 
     // disableAsyncBuffer disables the extra buffer used in async mode
     // (when both producer and consumer have set their "isControlledByApp"
     // flag) and has dequeueBuffer() return WOULD_BLOCK instead.
     //
     // This can only be called before consumerConnect().
-    status_t disableAsyncBuffer();
+    virtual status_t disableAsyncBuffer();
 
     // setMaxAcquiredBufferCount sets the maximum number of buffers that can
     // be acquired by the consumer at one time (default 1).  This call will
     // fail if a producer is connected to the BufferQueue.
-    status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers);
+    virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers);
 
     // setConsumerName sets the name used in logging
-    void setConsumerName(const String8& name);
+    virtual void setConsumerName(const String8& name);
 
     // setDefaultBufferFormat allows the BufferQueue to create
     // GraphicBuffers of a defaultFormat if no format is specified
     // in dequeueBuffer.  Formats are enumerated in graphics.h; the
     // initial default is HAL_PIXEL_FORMAT_RGBA_8888.
-    status_t setDefaultBufferFormat(uint32_t defaultFormat);
+    virtual status_t setDefaultBufferFormat(uint32_t defaultFormat);
 
     // setConsumerUsageBits will turn on additional usage bits for dequeueBuffer.
     // These are merged with the bits passed to dequeueBuffer.  The values are
     // enumerated in gralloc.h, e.g. GRALLOC_USAGE_HW_RENDER; the default is 0.
-    status_t setConsumerUsageBits(uint32_t usage);
+    virtual status_t setConsumerUsageBits(uint32_t usage);
 
     // setTransformHint bakes in rotation to buffers so overlays can be used.
     // The values are enumerated in window.h, e.g.
     // NATIVE_WINDOW_TRANSFORM_ROT_90.  The default is 0 (no transform).
-    status_t setTransformHint(uint32_t hint);
+    virtual status_t setTransformHint(uint32_t hint);
 
 
 private:
@@ -560,7 +491,7 @@
     // mConsumerListener is used to notify the connected consumer of
     // asynchronous events that it may wish to react to.  It is initially set
     // to NULL and is written by consumerConnect and consumerDisconnect.
-    sp<ConsumerListener> mConsumerListener;
+    sp<IConsumerListener> mConsumerListener;
 
     // mConsumerControlledByApp whether the connected consumer is controlled by the
     // application.
diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index 7b58bc5..daad757 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -24,6 +24,7 @@
 #include <utils/String8.h>
 #include <utils/Vector.h>
 #include <utils/threads.h>
+#include <gui/IConsumerListener.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
@@ -34,7 +35,7 @@
 // handles common tasks like management of the connection to the BufferQueue
 // and the buffer pool.
 class ConsumerBase : public virtual RefBase,
-        protected BufferQueue::ConsumerListener {
+        protected ConsumerListener {
 public:
     struct FrameAvailableListener : public virtual RefBase {
         // onFrameAvailable() is called each time an additional frame becomes
diff --git a/include/gui/IConsumerListener.h b/include/gui/IConsumerListener.h
new file mode 100644
index 0000000..ac2f9bb
--- /dev/null
+++ b/include/gui/IConsumerListener.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2013 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_GUI_ICONSUMERLISTENER_H
+#define ANDROID_GUI_ICONSUMERLISTENER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+#include <binder/IInterface.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+// ConsumerListener is the interface through which the BufferQueue notifies
+// the consumer of events that the consumer may wish to react to.  Because
+// the consumer will generally have a mutex that is locked during calls from
+// the consumer to the BufferQueue, these calls from the BufferQueue to the
+// consumer *MUST* be called only when the BufferQueue mutex is NOT locked.
+
+class ConsumerListener : public virtual RefBase {
+public:
+    ConsumerListener() { }
+    virtual ~ConsumerListener() { }
+
+    // onFrameAvailable is called from queueBuffer each time an additional
+    // frame becomes available for consumption. This means that frames that
+    // are queued while in asynchronous mode only trigger the callback if no
+    // previous frames are pending. Frames queued while in synchronous mode
+    // always trigger the callback.
+    //
+    // This is called without any lock held and can be called concurrently
+    // by multiple threads.
+    virtual void onFrameAvailable() = 0; /* Asynchronous */
+
+    // onBuffersReleased is called to notify the buffer consumer that the
+    // BufferQueue has released its references to one or more GraphicBuffers
+    // contained in its slots.  The buffer consumer should then call
+    // BufferQueue::getReleasedBuffers to retrieve the list of buffers
+    //
+    // This is called without any lock held and can be called concurrently
+    // by multiple threads.
+    virtual void onBuffersReleased() = 0; /* Asynchronous */
+};
+
+
+class IConsumerListener : public ConsumerListener, public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(ConsumerListener);
+};
+
+// ----------------------------------------------------------------------------
+
+class BnConsumerListener : public BnInterface<IConsumerListener>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_ICONSUMERLISTENER_H
diff --git a/include/gui/IGraphicBufferConsumer.h b/include/gui/IGraphicBufferConsumer.h
new file mode 100644
index 0000000..82b50c8
--- /dev/null
+++ b/include/gui/IGraphicBufferConsumer.h
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) 2013 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_GUI_IGRAPHICBUFFERCONSUMER_H
+#define ANDROID_GUI_IGRAPHICBUFFERCONSUMER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+
+#include <binder/IInterface.h>
+#include <ui/Rect.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+class IConsumerListener;
+class GraphicBuffer;
+class Fence;
+
+class IGraphicBufferConsumer : public IInterface {
+
+public:
+
+    // public facing structure for BufferSlot
+    class BufferItem : public Flattenable<BufferItem> {
+        friend class Flattenable<BufferItem>;
+        size_t getPodSize() const;
+        size_t getFlattenedSize() const;
+        size_t getFdCount() const;
+        status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const;
+        status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count);
+
+    public:
+        enum { INVALID_BUFFER_SLOT = -1 };
+        BufferItem();
+
+        // mGraphicBuffer points to the buffer allocated for this slot, or is NULL
+        // if the buffer in this slot has been acquired in the past (see
+        // BufferSlot.mAcquireCalled).
+        sp<GraphicBuffer> mGraphicBuffer;
+
+        // mFence is a fence that will signal when the buffer is idle.
+        sp<Fence> mFence;
+
+        // mCrop is the current crop rectangle for this buffer slot.
+        Rect mCrop;
+
+        // mTransform is the current transform flags for this buffer slot.
+        uint32_t mTransform;
+
+        // mScalingMode is the current scaling mode for this buffer slot.
+        uint32_t mScalingMode;
+
+        // mTimestamp is the current timestamp for this buffer slot. This gets
+        // to set by queueBuffer each time this slot is queued.
+        int64_t mTimestamp;
+
+        // mFrameNumber is the number of the queued frame for this slot.
+        uint64_t mFrameNumber;
+
+        // mBuf is the slot index of this buffer
+        int mBuf;
+
+        // mIsDroppable whether this buffer was queued with the
+        // property that it can be replaced by a new buffer for the purpose of
+        // making sure dequeueBuffer() won't block.
+        // i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer
+        // was queued.
+        bool mIsDroppable;
+
+        // Indicates whether this buffer has been seen by a consumer yet
+        bool mAcquireCalled;
+    };
+
+
+    // acquireBuffer attempts to acquire ownership of the next pending buffer in
+    // the BufferQueue.  If no buffer is pending then it returns -EINVAL.  If a
+    // buffer is successfully acquired, the information about the buffer is
+    // returned in BufferItem.  If the buffer returned had previously been
+    // acquired then the BufferItem::mGraphicBuffer field of buffer is set to
+    // NULL and it is assumed that the consumer still holds a reference to the
+    // buffer.
+    //
+    // If presentWhen is nonzero, it indicates the time when the buffer will
+    // be displayed on screen.  If the buffer's timestamp is farther in the
+    // future, the buffer won't be acquired, and PRESENT_LATER will be
+    // returned.  The presentation time is in nanoseconds, and the time base
+    // is CLOCK_MONOTONIC.
+    virtual status_t acquireBuffer(BufferItem *buffer, nsecs_t presentWhen) = 0;
+
+    // releaseBuffer releases a buffer slot from the consumer back to the
+    // BufferQueue.  This may be done while the buffer's contents are still
+    // being accessed.  The fence will signal when the buffer is no longer
+    // in use. frameNumber is used to indentify the exact buffer returned.
+    //
+    // If releaseBuffer returns STALE_BUFFER_SLOT, then the consumer must free
+    // any references to the just-released buffer that it might have, as if it
+    // had received a onBuffersReleased() call with a mask set for the released
+    // buffer.
+    //
+    // Note that the dependencies on EGL will be removed once we switch to using
+    // the Android HW Sync HAL.
+    virtual status_t releaseBuffer(int buf, uint64_t frameNumber,
+            EGLDisplay display, EGLSyncKHR fence,
+            const sp<Fence>& releaseFence) = 0;
+
+    // consumerConnect connects a consumer to the BufferQueue.  Only one
+    // consumer may be connected, and when that consumer disconnects the
+    // BufferQueue is placed into the "abandoned" state, causing most
+    // interactions with the BufferQueue by the producer to fail.
+    // controlledByApp indicates whether the consumer is controlled by
+    // the application.
+    //
+    // consumer may not be NULL.
+    virtual status_t consumerConnect(const sp<IConsumerListener>& consumer, bool controlledByApp) = 0;
+
+    // consumerDisconnect disconnects a consumer from the BufferQueue. All
+    // buffers will be freed and the BufferQueue is placed in the "abandoned"
+    // state, causing most interactions with the BufferQueue by the producer to
+    // fail.
+    virtual status_t consumerDisconnect() = 0;
+
+    // getReleasedBuffers sets the value pointed to by slotMask to a bit mask
+    // indicating which buffer slots have been released by the BufferQueue
+    // but have not yet been released by the consumer.
+    //
+    // This should be called from the onBuffersReleased() callback.
+    virtual status_t getReleasedBuffers(uint32_t* slotMask) = 0;
+
+    // setDefaultBufferSize is used to set the size of buffers returned by
+    // dequeueBuffer when a width and height of zero is requested.  Default
+    // is 1x1.
+    virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h) = 0;
+
+    // setDefaultMaxBufferCount sets the default value for the maximum buffer
+    // count (the initial default is 2). If the producer has requested a
+    // buffer count using setBufferCount, the default buffer count will only
+    // take effect if the producer sets the count back to zero.
+    //
+    // The count must be between 2 and NUM_BUFFER_SLOTS, inclusive.
+    virtual status_t setDefaultMaxBufferCount(int bufferCount) = 0;
+
+    // disableAsyncBuffer disables the extra buffer used in async mode
+    // (when both producer and consumer have set their "isControlledByApp"
+    // flag) and has dequeueBuffer() return WOULD_BLOCK instead.
+    //
+    // This can only be called before consumerConnect().
+    virtual status_t disableAsyncBuffer() = 0;
+
+    // setMaxAcquiredBufferCount sets the maximum number of buffers that can
+    // be acquired by the consumer at one time (default 1).  This call will
+    // fail if a producer is connected to the BufferQueue.
+    virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers) = 0;
+
+    // setConsumerName sets the name used in logging
+    virtual void setConsumerName(const String8& name) = 0;
+
+    // setDefaultBufferFormat allows the BufferQueue to create
+    // GraphicBuffers of a defaultFormat if no format is specified
+    // in dequeueBuffer.  Formats are enumerated in graphics.h; the
+    // initial default is HAL_PIXEL_FORMAT_RGBA_8888.
+    virtual status_t setDefaultBufferFormat(uint32_t defaultFormat) = 0;
+
+    // setConsumerUsageBits will turn on additional usage bits for dequeueBuffer.
+    // These are merged with the bits passed to dequeueBuffer.  The values are
+    // enumerated in gralloc.h, e.g. GRALLOC_USAGE_HW_RENDER; the default is 0.
+    virtual status_t setConsumerUsageBits(uint32_t usage) = 0;
+
+    // setTransformHint bakes in rotation to buffers so overlays can be used.
+    // The values are enumerated in window.h, e.g.
+    // NATIVE_WINDOW_TRANSFORM_ROT_90.  The default is 0 (no transform).
+    virtual status_t setTransformHint(uint32_t hint) = 0;
+
+public:
+    DECLARE_META_INTERFACE(GraphicBufferConsumer);
+};
+
+// ----------------------------------------------------------------------------
+
+class BnGraphicBufferConsumer : public BnInterface<IGraphicBufferConsumer>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_IGRAPHICBUFFERCONSUMER_H