Add content::SurfaceCapturer

content/common/gpu/media/gl_surface_capturer.h

+// Copyright (c) 2013 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_GL_SURFACE_CAPTURER_H_
+#define CONTENT_COMMON_GPU_MEDIA_GL_SURFACE_CAPTURER_H_
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "content/common/gpu/surface_capturer.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_sender.h"
+
+namespace gfx {
+
+class Size;
+class Rect;
+
+};  // namespace gfx
+
+namespace content {
+
+class GpuChannelHost;
+
+// This class implements the GPU process side of a SurfaceCapturer,
+// communicating over IPC with a GLSurfaceCapturerHost on the browser process.
+class GLSurfaceCapturer : public IPC::Listener,
+                          public SurfaceCapturer::Client,
+                          public GpuCommandBufferStub::DestructionObserver {
+ public:
+  GLSurfaceCapturer(int32 route_id, GpuCommandBufferStub* stub);
+  virtual ~GLSurfaceCapturer();
+
+  // IPC::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // SurfaceCapturer::Client implementation.
+  virtual void NotifyCaptureParameters(const gfx::Size& buffer_size,
+                                       const gfx::Rect& visible_rect) OVERRIDE;
+  virtual void NotifyError(SurfaceCapturer::Error error) OVERRIDE;
+
+  // GpuCommandBufferStub::DestructionObserver implementation.
+  virtual void OnWillDestroyStub() OVERRIDE;
+
+ private:
+  // Handlers for IPC messages.
+  void OnInitialize(media::VideoFrame::Format format);
+  void OnCapture(int32 frame_id,
+                 base::SharedMemoryHandle buffer_shm,
+                 uint32 buffer_size);
+  void OnDestroy();
+
+  // Callback to bind to the media::VideoFrames we send to the encoder, called
+  // when the frame is finished.
+  void CaptureFrameFinished(int32 frame_id, scoped_ptr<base::SharedMemory> shm);
+
+  void Send(IPC::Message* message);
+
+  const base::ThreadChecker thread_checker_;

[hshi1, 2013/08/15 19:40:18]

const thread_checker_ not initialized in ctor.

+
+  // Weak pointer for media::VideoFrames that refer back to |this|.
+  base::WeakPtrFactory<GLSurfaceCapturer> weak_this_factory_;
+
+  // Route ID assigned by the GpuCommandBufferStub.
+  const int32 route_id_;
+
+  // The GpuCommandBufferStub this instance belongs to, as an unowned pointer
+  // since |stub_| will own (and outlive) this.
+  GpuCommandBufferStub* const stub_;
+
+  // The underlying capturer we delegate to.
+  scoped_ptr<SurfaceCapturer> surface_capturer_;
+
+  // The capture output parameters that the capturer informs us of.
+  media::VideoFrame::Format output_format_;
+  gfx::Size output_buffer_size_;
+  gfx::Rect output_visible_rect_;
+
+  DISALLOW_COPY_AND_ASSIGN(GLSurfaceCapturer);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_GL_SURFACE_CAPTURER_H_