content/renderer/pepper_platform_video_capture_impl.h

   1 // Copyright (c) 2012 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_RENDERER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_
   6 #define CONTENT_RENDERER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_
   7 #pragma once
   8
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "media/video/capture/video_capture.h"
  16 #include "webkit/plugins/ppapi/plugin_delegate.h"
  17
  18 class PepperPluginDelegateImpl;
  19
  20 namespace media {
  21 class VideoCaptureHandlerProxy;
  22 }
  23
  24 class PepperPlatformVideoCaptureImpl
  25     : public webkit::ppapi::PluginDelegate::PlatformVideoCapture,
  26       public media::VideoCapture::EventHandler {
  27  public:
  28   PepperPlatformVideoCaptureImpl(
  29       const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
  30       const std::string& device_id,
  31       webkit::ppapi::PluginDelegate::PlatformVideoCaptureEventHandler* handler);
  32   virtual ~PepperPlatformVideoCaptureImpl();
  33
  34   // webkit::ppapi::PluginDelegate::PlatformVideoCapture implementation.
  35   virtual void StartCapture(media::VideoCapture::EventHandler* handler,
  36                             const VideoCaptureCapability& capability) OVERRIDE;
  37   virtual void StopCapture(media::VideoCapture::EventHandler* handler) OVERRIDE;
  38   virtual void FeedBuffer(scoped_refptr<VideoFrameBuffer> buffer) OVERRIDE;
  39   virtual bool CaptureStarted() OVERRIDE;
  40   virtual int CaptureWidth() OVERRIDE;
  41   virtual int CaptureHeight() OVERRIDE;
  42   virtual int CaptureFrameRate() OVERRIDE;
  43   virtual void DetachEventHandler() OVERRIDE;
  44
  45   // media::VideoCapture::EventHandler implementation
  46   virtual void OnStarted(VideoCapture* capture) OVERRIDE;
  47   virtual void OnStopped(VideoCapture* capture) OVERRIDE;
  48   virtual void OnPaused(VideoCapture* capture) OVERRIDE;
  49   virtual void OnError(VideoCapture* capture, int error_code) OVERRIDE;
  50   virtual void OnRemoved(VideoCapture* capture) OVERRIDE;
  51   virtual void OnBufferReady(VideoCapture* capture,
  52                              scoped_refptr<VideoFrameBuffer> buffer) OVERRIDE;
  53   virtual void OnDeviceInfoReceived(
  54       VideoCapture* capture,
  55       const media::VideoCaptureParams& device_info) OVERRIDE;
  56
  57  private:
  58   void Initialize();
  59
  60   void OnDeviceOpened(int request_id,
  61                       bool succeeded,
  62                       const std::string& label);
  63
  64   base::WeakPtr<PepperPluginDelegateImpl> plugin_delegate_;
  65
  66   std::string device_id_;
  67   std::string label_;
  68   int session_id_;
  69
  70   scoped_ptr<media::VideoCaptureHandlerProxy> handler_proxy_;
  71
  72   webkit::ppapi::PluginDelegate::PlatformVideoCaptureEventHandler* handler_;
  73
  74   media::VideoCapture* video_capture_;
  75
  76   // StartCapture() must be balanced by StopCapture(), otherwise this object
  77   // will leak.
  78   bool unbalanced_start_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(PepperPlatformVideoCaptureImpl);
  81 };
  82
  83 #endif  // CONTENT_RENDERER_PEPPER_PLATFORM_VIDEO_CAPTURE_IMPL_H_