Introduce GpuVideoDecodeAcceleratorFactory.

content/common/gpu/media/vt_video_decode_accelerator_mac.h

 // Copyright 2014 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_VT_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <queue>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/gpu/media/vt_mac.h"
+#include "content/public/common/gpu_video_decode_accelerator_helpers.h"
 #include "media/filters/h264_parser.h"
 #include "media/video/h264_poc.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_context_cgl.h"
 #include "ui/gl/gl_image_io_surface.h"
 
 namespace content {
 
 // Preload VideoToolbox libraries, needed for sandbox warmup.
 bool InitializeVideoToolbox();
 
 // VideoToolbox.framework implementation of the VideoDecodeAccelerator
 // interface for Mac OS X (currently limited to 10.9+).
 class VTVideoDecodeAccelerator : public media::VideoDecodeAccelerator {
  public:
   explicit VTVideoDecodeAccelerator(
-      const base::Callback<bool(void)>& make_context_current,
-      const base::Callback<
-          void(uint32_t, uint32_t, scoped_refptr<gl::GLImage>)>& bind_image);
+      const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+      const gpu_vda_helpers::BindGLImageCb& bind_image_cb);
+
   ~VTVideoDecodeAccelerator() override;
 
   // VideoDecodeAccelerator implementation.
   bool Initialize(const Config& config, Client* client) override;
   void Decode(const media::BitstreamBuffer& bitstream) override;
   void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& pictures) override;
   void ReusePictureBuffer(int32_t picture_id) override;
   void Flush() override;
   void Reset() override;
   void Destroy() override;
-  bool CanDecodeOnIOThread() override;
+  bool TryInitializeDecodeOnSeparateThread(
+      const base::WeakPtr<Client>& decode_client,
+      const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner)
+      override;
 
   // Called by OutputThunk() when VideoToolbox finishes decoding a frame.
   void Output(
       void* source_frame_refcon,
       OSStatus status,
       CVImageBufferRef image_buffer);
 
   static media::VideoDecodeAccelerator::SupportedProfiles
       GetSupportedProfiles();
 
@@ skipping 119 matching lines @@
 
   // These methods returns true if a task was completed, false otherwise.
   bool ProcessTaskQueue();
   bool ProcessReorderQueue();
   bool ProcessFrame(const Frame& frame);
   bool SendFrame(const Frame& frame);
 
   //
   // GPU thread state.
   //
-  base::Callback<bool(void)> make_context_current_;
-  base::Callback<void(uint32_t, uint32_t, scoped_refptr<gl::GLImage>)>
-      bind_image_;
+  gpu_vda_helpers::MakeGLContextCurrentCb make_context_current_cb_;
+  gpu_vda_helpers::BindGLImageCb bind_image_cb_;
   media::VideoDecodeAccelerator::Client* client_;
   State state_;
 
   // Queue of pending flush tasks. This is used to drop frames when a reset
   // is pending.
   std::queue<TaskType> pending_flush_tasks_;
 
   // Queue of tasks to complete in the GPU thread.
   std::queue<Task> task_queue_;
 
@@ skipping 59 matching lines @@
   // Declared last to ensure that all weak pointers are invalidated before
   // other destructors run.
   base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VTVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_