content/common/gpu/media/gl_surface_capturer.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_COMMON_GPU_MEDIA_GL_SURFACE_CAPTURER_H_
   6 #define CONTENT_COMMON_GPU_MEDIA_GL_SURFACE_CAPTURER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/containers/small_map.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "content/common/gpu/gpu_command_buffer_stub.h"
  13 #include "content/common/gpu/surface_capturer.h"
  14 #include "ipc/ipc_listener.h"
  15 #include "ipc/ipc_sender.h"
  16
  17 namespace gfx {
  18
  19 class Size;
  20 class Rect;
  21
  22 }  // namespace gfx
  23
  24 namespace content {
  25
  26 class GpuChannelHost;
  27
  28 // This class implements the GPU process side of a SurfaceCapturer,
  29 // communicating over IPC with a GLSurfaceCapturerHost on the browser process.
  30 class GLSurfaceCapturer : public IPC::Listener,
  31                           public SurfaceCapturer::Client,
  32                           public GpuCommandBufferStub::DestructionObserver {
  33  public:
  34   GLSurfaceCapturer(int32 route_id, GpuCommandBufferStub* stub);
  35   virtual ~GLSurfaceCapturer();
  36
  37   // IPC::Listener implementation.
  38   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  39
  40   // SurfaceCapturer::Client implementation.
  41   virtual void NotifyCaptureParameters(const gfx::Size& buffer_size,
  42                                        const gfx::Rect& visible_rect) OVERRIDE;
  43   virtual void NotifyCopyCaptureDone(
  44       const scoped_refptr<media::VideoFrame>& frame) OVERRIDE;
  45   virtual void NotifyError(SurfaceCapturer::Error error) OVERRIDE;
  46
  47   // GpuCommandBufferStub::DestructionObserver implementation.
  48   virtual void OnWillDestroyStub() OVERRIDE;
  49
  50  private:
  51   // Handlers for IPC messages.
  52   void OnInitialize(media::VideoFrame::Format format);
  53   void OnCopyCaptureToVideoFrame(int32 frame_id,
  54                                  base::SharedMemoryHandle buffer_shm,
  55                                  uint32 buffer_size);
  56   void OnTryCapture();
  57   void OnDestroy();
  58
  59   void Send(IPC::Message* message);
  60
  61   const base::ThreadChecker thread_checker_;
  62
  63   // Route ID assigned by the GpuCommandBufferStub.
  64   const int32 route_id_;
  65
  66   // The GpuCommandBufferStub this instance belongs to, as an unowned pointer
  67   // since |stub_| will own (and outlive) this.
  68   GpuCommandBufferStub* const stub_;
  69
  70   // media::VideoFrames received from the host side.
  71   typedef base::SmallMap<std::map<scoped_refptr<media::VideoFrame>, int32> >
  72       FrameIdMap;
  73   FrameIdMap frame_id_map_;
  74
  75   // The underlying capturer we delegate to.
  76   scoped_ptr<SurfaceCapturer> surface_capturer_;
  77
  78   // The capture output parameters that the capturer informs us of.
  79   media::VideoFrame::Format output_format_;
  80   gfx::Size output_buffer_size_;
  81   gfx::Rect output_visible_rect_;
  82
  83   DISALLOW_COPY_AND_ASSIGN(GLSurfaceCapturer);
  84 };
  85
  86 }  // namespace content
  87
  88 #endif  // CONTENT_COMMON_GPU_MEDIA_GL_SURFACE_CAPTURER_H_