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
20class GURL;
21
22namespace content {
23class PepperMediaDeviceManager;
24class PepperVideoCaptureHost;
25
26// This object must only be used on the thread it's constructed on.
27class 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_
77