content/renderer/pepper/pepper_platform_video_capture.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_PEPPER_PLATFORM_VIDEO_CAPTURE_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "base/threading/thread_checker.h"
  16 #include "base/time/time.h"
  17 #include "content/common/media/video_capture.h"
  18 #include "media/video/capture/video_capture_types.h"
  19
  20 class GURL;
  21
  22 namespace content {
  23 class PepperMediaDeviceManager;
  24 class PepperVideoCaptureHost;
  25
  26 // This object must only be used on the thread it's constructed on.
  27 class PepperPlatformVideoCapture {
  28  public:
  29   PepperPlatformVideoCapture(int render_frame_id,
  30                              const std::string& device_id,
  31                              const GURL& document_url,
  32                              PepperVideoCaptureHost* handler);
  33   virtual ~PepperPlatformVideoCapture();
  34
  35   // Detaches the event handler and stops sending notifications to it.
  36   void DetachEventHandler();
  37
  38   void StartCapture(const media::VideoCaptureParams& params);
  39   void StopCapture();
  40
  41  private:
  42   void OnDeviceOpened(int request_id, bool succeeded, const std::string& label);
  43   void OnStateUpdate(VideoCaptureState state);
  44   void OnFrameReady(const scoped_refptr<media::VideoFrame>& frame,
  45                     const media::VideoCaptureFormat& format,
  46                     const base::TimeTicks& estimated_capture_time);
  47
  48   // Can return NULL if the RenderFrame referenced by |render_frame_id_| has
  49   // gone away.
  50   PepperMediaDeviceManager* GetMediaDeviceManager();
  51
  52   const int render_frame_id_;
  53   const std::string device_id_;
  54
  55   std::string label_;
  56   int session_id_;
  57   base::Closure release_device_cb_;
  58   base::Closure stop_capture_cb_;
  59
  60   PepperVideoCaptureHost* handler_;
  61
  62   // Whether we have a pending request to open a device. We have to make sure
  63   // there isn't any pending request before this object goes away.
  64   bool pending_open_device_;
  65   int pending_open_device_id_;
  66
  67   base::ThreadChecker thread_checker_;
  68
  69   base::WeakPtrFactory<PepperPlatformVideoCapture> weak_factory_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(PepperPlatformVideoCapture);
  72 };
  73
  74 }  // namespace content
  75
  76 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_H_