Run VDA::Decode on GPU IO thread if VDA supports it.

content/common/gpu/media/gpu_video_decode_accelerator.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "content/common/gpu/media/video_decode_accelerator_impl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "media/video/video_decode_accelerator.h"
 
+namespace base {
+class MessageLoopProxy;
+}
+
 namespace content {
 
 class GpuVideoDecodeAccelerator
     : public IPC::Listener,
       public IPC::Sender,
       public media::VideoDecodeAccelerator::Client,
       public GpuCommandBufferStub::DestructionObserver {
  public:
   // Each of the arguments to the constructor must outlive this object.
   // |stub->decoder()| will be made current around any operation that touches
@@ skipping 20 matching lines @@
   virtual void OnWillDestroyStub() OVERRIDE;
 
   // Function to delegate sending to actual sender.
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
   // Initialize the accelerator with the given profile and send the
   // |init_done_msg| when done.
   // The renderer process handle is valid as long as we have a channel between
   // GPU process and the renderer.
   void Initialize(const media::VideoCodecProfile profile,
-                  IPC::Message* init_done_msg);
+                  IPC::Message* init_done_msg,
+                  const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
 
  private:
+  class MessageFilter;
+
   // Handlers for IPC messages.
   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
   void OnAssignPictureBuffers(
       const std::vector<int32>& buffer_ids,
       const std::vector<uint32>& texture_ids,
       const std::vector<gfx::Size>& sizes);
   void OnReusePictureBuffer(
       int32 picture_buffer_id);
   void OnFlush();
   void OnReset();
   void OnDestroy();
 
+  // Called on IO thread when |filter_| has been removed.
+  void OnFilterRemoved();
+
   // Message to Send() when initialization is done.  Is only non-NULL during
   // initialization and is owned by the IPC channel underlying the
   // GpuCommandBufferStub.
   IPC::Message* init_done_msg_;
 
   // Route ID to communicate with the host.
   int32 host_route_id_;
 
   // Unowned pointer to the underlying GpuCommandBufferStub.
   GpuCommandBufferStub* stub_;
 
   // The underlying VideoDecodeAccelerator.
-  scoped_ptr<media::VideoDecodeAccelerator> video_decode_accelerator_;
+  scoped_ptr<VideoDecodeAcceleratorImpl> video_decode_accelerator_;
 
   // Callback for making the relevant context current for GL calls.
   // Returns false if failed.
   base::Callback<bool(void)> make_context_current_;
 
   // The texture target as requested by ProvidePictureBuffers().
   uint32 texture_target_;
 
+  // The message filter to run VDA::Decode on IO thread if VDA supports it.
+  scoped_refptr<MessageFilter> filter_;
+
+  // GPU child message loop.
+  scoped_refptr<base::MessageLoopProxy> child_message_loop_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_