Add media::VideoEncodeAccelerator with WebRTC integration

content/renderer/media/renderer_gpu_video_decoder_factories.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_RENDERER_MEDIA_RENDERER_GPU_VIDEO_DECODER_FACTORIES_H_
-#define CONTENT_RENDERER_MEDIA_RENDERER_GPU_VIDEO_DECODER_FACTORIES_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/synchronization/waitable_event.h"
-#include "content/common/content_export.h"
-#include "media/filters/gpu_video_decoder_factories.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "ui/gfx/size.h"
-
-namespace base {
-class MessageLoopProxy;
-class WaitableEvent;
-}
-
-namespace content {
-class GpuChannelHost;
-class WebGraphicsContext3DCommandBufferImpl;
-
-// Glue code to expose functionality needed by media::GpuVideoDecoder to
-// RenderViewImpl.  This class is entirely an implementation detail of
-// RenderViewImpl and only has its own header to allow extraction of its
-// implementation from render_view_impl.cc which is already far too large.
-//
-// The public methods of the class can be called from any thread, and are
-// internally trampolined to the appropriate thread.  GPU/GL-related calls go to
-// the constructor-argument loop (the media thread), and shmem-related calls go
-// to the render thread.
-class CONTENT_EXPORT RendererGpuVideoDecoderFactories
-    : public media::GpuVideoDecoderFactories {
- public:
-  // Takes a ref on |gpu_channel_host| and tests |context| for loss before each
-  // use.
-  RendererGpuVideoDecoderFactories(
-      GpuChannelHost* gpu_channel_host,
-      const scoped_refptr<base::MessageLoopProxy>& message_loop,
-      WebGraphicsContext3DCommandBufferImpl* wgc3dcbi);
-
-  // media::GpuVideoDecoderFactories implementation.
-  virtual media::VideoDecodeAccelerator* CreateVideoDecodeAccelerator(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client) OVERRIDE;
-  // Creates textures and produces them into mailboxes. Returns a sync point to
-  // wait on before using the mailboxes, or 0 on failure.
-  virtual uint32 CreateTextures(
-      int32 count, const gfx::Size& size,
-      std::vector<uint32>* texture_ids,
-      std::vector<gpu::Mailbox>* texture_mailboxes,
-      uint32 texture_target) OVERRIDE;
-  virtual void DeleteTexture(uint32 texture_id) OVERRIDE;
-  virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE;
-  virtual void ReadPixels(uint32 texture_id,
-                          uint32 texture_target,
-                          const gfx::Size& size,
-                          const SkBitmap& pixels) OVERRIDE;
-  virtual base::SharedMemory* CreateSharedMemory(size_t size) OVERRIDE;
-  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() OVERRIDE;
-  virtual void Abort() OVERRIDE;
-  virtual bool IsAborted() OVERRIDE;
-
-  // Makes a copy of |this|.
-  scoped_refptr<media::GpuVideoDecoderFactories> Clone();
-
- protected:
-  friend class base::RefCountedThreadSafe<RendererGpuVideoDecoderFactories>;
-  virtual ~RendererGpuVideoDecoderFactories();
-
- private:
-  RendererGpuVideoDecoderFactories();
-
-  // Helper for the constructor to acquire the ContentGLContext on
-  // |message_loop_|.
-  void AsyncGetContext(WebGraphicsContext3DCommandBufferImpl* context);
-
-  // Async versions of the public methods.  They use output parameters instead
-  // of return values and each takes a WaitableEvent* param to signal completion
-  // (except for DeleteTexture, which is fire-and-forget).
-  // AsyncCreateSharedMemory runs on the renderer thread and the rest run on
-  // |message_loop_|.
-  // The AsyncCreateVideoDecodeAccelerator returns its output in the vda_
-  // member.
-  void AsyncCreateVideoDecodeAccelerator(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client);
-  void AsyncCreateTextures(int32 count, const gfx::Size& size,
-                           uint32 texture_target, uint32* sync_point);
-  void AsyncDeleteTexture(uint32 texture_id);
-  void AsyncWaitSyncPoint(uint32 sync_point);
-  void AsyncReadPixels(uint32 texture_id, uint32 texture_target,
-                       const gfx::Size& size);
-  void AsyncCreateSharedMemory(size_t size);
-  void AsyncDestroyVideoDecodeAccelerator();
-
-  scoped_refptr<base::MessageLoopProxy> message_loop_;
-  scoped_refptr<base::MessageLoopProxy> main_message_loop_;
-  scoped_refptr<GpuChannelHost> gpu_channel_host_;
-  base::WeakPtr<WebGraphicsContext3DCommandBufferImpl> context_;
-
-  // This event is signaled if we have been asked to Abort().
-  base::WaitableEvent aborted_waiter_;
-
-  // This event is signaled by asynchronous tasks posted to |message_loop_| to
-  // indicate their completion.
-  // e.g. AsyncCreateVideoDecodeAccelerator()/AsyncCreateTextures() etc.
-  base::WaitableEvent message_loop_async_waiter_;
-
-  // This event is signaled by asynchronous tasks posted to the renderer thread
-  // message loop to indicate their completion. e.g. AsyncCreateSharedMemory.
-  base::WaitableEvent render_thread_async_waiter_;
-
-  // The vda returned by the CreateVideoAcclelerator function.
-  scoped_ptr<media::VideoDecodeAccelerator> vda_;
-
-  // Shared memory segment which is returned by the CreateSharedMemory()
-  // function.
-  scoped_ptr<base::SharedMemory> shared_memory_segment_;
-
-  // Bitmap returned by ReadPixels().
-  SkBitmap read_pixels_bitmap_;
-
-  // Textures returned by the CreateTexture() function.
-  std::vector<uint32> created_textures_;
-  std::vector<gpu::Mailbox> created_texture_mailboxes_;
-
-  DISALLOW_COPY_AND_ASSIGN(RendererGpuVideoDecoderFactories);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_MEDIA_RENDERER_GPU_VIDEO_DECODER_FACTORIES_H_