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/base/video_capture_types.h"
  19
  20 class GURL;
  21
  22 namespace media {
  23 class VideoFrame;
  24 }  // namespace media
  25
  26 namespace content {
  27 class PepperMediaDeviceManager;
  28 class PepperVideoCaptureHost;
  29
  30 // This object must only be used on the thread it's constructed on.
  31 class PepperPlatformVideoCapture {
  32  public:
  33   PepperPlatformVideoCapture(int render_frame_id,
  34                              const std::string& device_id,
  35                              const GURL& document_url,
  36                              PepperVideoCaptureHost* handler);
  37   virtual ~PepperPlatformVideoCapture();
  38
  39   // Detaches the event handler and stops sending notifications to it.
  40   void DetachEventHandler();
  41
  42   void StartCapture(const media::VideoCaptureParams& params);
  43   void StopCapture();
  44
  45  private:
  46   void OnDeviceOpened(int request_id, bool succeeded, const std::string& label);
  47   void OnStateUpdate(VideoCaptureState state);
  48   void OnFrameReady(const scoped_refptr<media::VideoFrame>& frame,
  49                     base::TimeTicks estimated_capture_time);
  50
  51   // Can return NULL if the RenderFrame referenced by |render_frame_id_| has
  52   // gone away.
  53   PepperMediaDeviceManager* GetMediaDeviceManager();
  54
  55   const int render_frame_id_;
  56   const std::string device_id_;
  57
  58   std::string label_;
  59   int session_id_;
  60   base::Closure release_device_cb_;
  61   base::Closure stop_capture_cb_;
  62
  63   PepperVideoCaptureHost* handler_;
  64
  65   // Whether we have a pending request to open a device. We have to make sure
  66   // there isn't any pending request before this object goes away.
  67   bool pending_open_device_;
  68   int pending_open_device_id_;
  69
  70   base::ThreadChecker thread_checker_;
  71
  72   base::WeakPtrFactory<PepperPlatformVideoCapture> weak_factory_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(PepperPlatformVideoCapture);
  75 };
  76
  77 }  // namespace content
  78
  79 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_VIDEO_CAPTURE_H_