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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Windows specific implementation of VideoCaptureDevice. | 5 // Windows specific implementation of VideoCaptureDevice. |
6 // DirectShow is used for capturing. DirectShow provide its own threads | 6 // DirectShow is used for capturing. DirectShow provide its own threads |
7 // for capturing. | 7 // for capturing. |
8 | 8 |
9 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ | 9 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ |
10 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ | 10 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ |
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31 public VideoCaptureDevice { | 31 public VideoCaptureDevice { |
32 public: | 32 public: |
33 explicit VideoCaptureDeviceMFWin(const Name& device_name); | 33 explicit VideoCaptureDeviceMFWin(const Name& device_name); |
34 virtual ~VideoCaptureDeviceMFWin(); | 34 virtual ~VideoCaptureDeviceMFWin(); |
35 | 35 |
36 // Opens the device driver for this device. | 36 // Opens the device driver for this device. |
37 // This function is used by the static VideoCaptureDevice::Create function. | 37 // This function is used by the static VideoCaptureDevice::Create function. |
38 bool Init(); | 38 bool Init(); |
39 | 39 |
40 // VideoCaptureDevice implementation. | 40 // VideoCaptureDevice implementation. |
41 virtual void AllocateAndStart( | 41 virtual void AllocateAndStart(const VideoCaptureParams& params, |
42 const VideoCaptureCapability& capture_format, | 42 scoped_ptr<VideoCaptureDevice::Client> client) |
43 scoped_ptr<VideoCaptureDevice::Client> client) OVERRIDE; | 43 OVERRIDE; |
44 virtual void StopAndDeAllocate() OVERRIDE; | 44 virtual void StopAndDeAllocate() OVERRIDE; |
45 | 45 |
46 // Returns true iff the current platform supports the Media Foundation API | 46 // Returns true iff the current platform supports the Media Foundation API |
47 // and that the DLLs are available. On Vista this API is an optional download | 47 // and that the DLLs are available. On Vista this API is an optional download |
48 // but the API is advertised as a part of Windows 7 and onwards. However, | 48 // but the API is advertised as a part of Windows 7 and onwards. However, |
49 // we've seen that the required DLLs are not available in some Win7 | 49 // we've seen that the required DLLs are not available in some Win7 |
50 // distributions such as Windows 7 N and Windows 7 KN. | 50 // distributions such as Windows 7 N and Windows 7 KN. |
51 static bool PlatformSupported(); | 51 static bool PlatformSupported(); |
52 | 52 |
53 static void GetDeviceNames(Names* device_names); | 53 static void GetDeviceNames(Names* device_names); |
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64 private: | 64 private: |
65 void OnError(HRESULT hr); | 65 void OnError(HRESULT hr); |
66 | 66 |
67 Name name_; | 67 Name name_; |
68 base::win::ScopedComPtr<IMFActivate> device_; | 68 base::win::ScopedComPtr<IMFActivate> device_; |
69 scoped_refptr<MFReaderCallback> callback_; | 69 scoped_refptr<MFReaderCallback> callback_; |
70 | 70 |
71 base::Lock lock_; // Used to guard the below variables. | 71 base::Lock lock_; // Used to guard the below variables. |
72 scoped_ptr<VideoCaptureDevice::Client> client_; | 72 scoped_ptr<VideoCaptureDevice::Client> client_; |
73 base::win::ScopedComPtr<IMFSourceReader> reader_; | 73 base::win::ScopedComPtr<IMFSourceReader> reader_; |
74 VideoCaptureCapability current_setting_; | 74 VideoCaptureFormat capture_format_; |
75 bool capture_; | 75 bool capture_; |
76 | 76 |
77 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin); | 77 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin); |
78 }; | 78 }; |
79 | 79 |
80 } // namespace media | 80 } // namespace media |
81 | 81 |
82 #endif // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ | 82 #endif // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_MF_WIN_H_ |
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