commit 399184a4cd728ea1421fb0bc1722274a29e38f4a
author Jesse Hall <jessehall@google.com> Mon Mar 03 15:42:54 2014 -0800
committer Jesse Hall <jessehall@google.com> Tue Mar 11 12:23:14 2014 -0700
tree 7185bc1ac84eec1afebc221ed91d90b90fa9a7fb
parent 05fe2d1cfbf580c04ef1b1f0130b5dccba6dfe33

Add sideband streams to BufferQueue and related classes

Sideband streams are essentially a device-specific buffer queue that
bypasses the BufferQueue system. They can be used for situations with
hard real-time requirements like high-quality TV and video playback
with A/V sync. A handle to the stream is provided by the source HAL,
and attached to a BufferQueue. The sink HAL can read buffers via the
stream handle rather than acquiring individual buffers from the
BufferQueue.

Change-Id: Ib3f262eddfc520f4bbe3d9b91753ed7dd09d3a9b

services/surfaceflinger/Layer.h

diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 9283eaa..43de999 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -66,7 +66,7 @@
  * This also implements onFrameAvailable(), which notifies SurfaceFlinger
  * that new data has arrived.
  */
-class Layer : public SurfaceFlingerConsumer::FrameAvailableListener {
+class Layer : public SurfaceFlingerConsumer::ContentsChangedListener {
     static int32_t sSequence;
 
 public:
@@ -313,8 +313,9 @@
 
 
 private:
-    // Interface implementation for SurfaceFlingerConsumer::FrameAvailableListener
+    // Interface implementation for SurfaceFlingerConsumer::ContentsChangedListener
     virtual void onFrameAvailable();
+    virtual void onSidebandStreamChanged();
 
     void commitTransaction();
 
@@ -351,10 +352,12 @@
 
     // thread-safe
     volatile int32_t mQueuedFrames;
+    volatile int32_t mSidebandStreamChanged; // used like an atomic boolean
     FrameTracker mFrameTracker;
 
     // main thread
     sp<GraphicBuffer> mActiveBuffer;
+    sp<NativeHandle> mSidebandStream;
     Rect mCurrentCrop;
     uint32_t mCurrentTransform;
     uint32_t mCurrentScalingMode;