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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_WIN_H_ | 9 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
10 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ | 10 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
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55 | 55 |
56 static HRESULT GetDeviceFilter(const std::string& device_id, | 56 static HRESULT GetDeviceFilter(const std::string& device_id, |
57 const CLSID device_class_id, | 57 const CLSID device_class_id, |
58 IBaseFilter** filter); | 58 IBaseFilter** filter); |
59 static base::win::ScopedComPtr<IPin> GetPin(IBaseFilter* filter, | 59 static base::win::ScopedComPtr<IPin> GetPin(IBaseFilter* filter, |
60 PIN_DIRECTION pin_dir, | 60 PIN_DIRECTION pin_dir, |
61 REFGUID category, | 61 REFGUID category, |
62 REFGUID major_type); | 62 REFGUID major_type); |
63 static VideoPixelFormat TranslateMediaSubtypeToPixelFormat( | 63 static VideoPixelFormat TranslateMediaSubtypeToPixelFormat( |
64 const GUID& sub_type); | 64 const GUID& sub_type); |
| 65 static bool CreateCapabilityMap(IPin* output_capture_pin, |
| 66 IBaseFilter* capture_filter, |
| 67 CapabilityList* capabilities); |
65 | 68 |
66 explicit VideoCaptureDeviceWin(const Name& device_name); | 69 explicit VideoCaptureDeviceWin(const Name& device_name); |
67 virtual ~VideoCaptureDeviceWin(); | 70 virtual ~VideoCaptureDeviceWin(); |
68 // Opens the device driver for this device. | 71 // Opens the device driver for this device. |
69 bool Init(); | 72 bool Init(); |
70 | 73 |
71 // VideoCaptureDevice implementation. | 74 // VideoCaptureDevice implementation. |
72 virtual void AllocateAndStart( | 75 virtual void AllocateAndStart( |
73 const VideoCaptureParams& params, | 76 const VideoCaptureParams& params, |
74 scoped_ptr<VideoCaptureDevice::Client> client) override; | 77 scoped_ptr<VideoCaptureDevice::Client> client) override; |
75 virtual void StopAndDeAllocate() override; | 78 virtual void StopAndDeAllocate() override; |
76 | 79 |
77 private: | 80 private: |
78 enum InternalState { | 81 enum InternalState { |
79 kIdle, // The device driver is opened but camera is not in use. | 82 kIdle, // The device driver is opened but camera is not in use. |
80 kCapturing, // Video is being captured. | 83 kCapturing, // Video is being captured. |
81 kError // Error accessing HW functions. | 84 kError // Error accessing HW functions. |
82 // User needs to recover by destroying the object. | 85 // User needs to recover by destroying the object. |
83 }; | 86 }; |
84 | 87 |
85 // Implements SinkFilterObserver. | 88 // Implements SinkFilterObserver. |
86 virtual void FrameReceived(const uint8* buffer, int length); | 89 virtual void FrameReceived(const uint8* buffer, int length); |
87 | 90 |
88 bool CreateCapabilityMap(); | |
89 void SetAntiFlickerInCaptureFilter(); | 91 void SetAntiFlickerInCaptureFilter(); |
90 HRESULT InstantiateWDMFiltersAndPins(); | 92 HRESULT InstantiateWDMFiltersAndPins(); |
91 HRESULT AddWDMCrossbarFilterToGraphAndConnect(); | 93 HRESULT AddWDMCrossbarFilterToGraphAndConnect(); |
92 void SetErrorState(const std::string& reason); | 94 void SetErrorState(const std::string& reason); |
93 | 95 |
94 Name device_name_; | 96 Name device_name_; |
95 InternalState state_; | 97 InternalState state_; |
96 scoped_ptr<VideoCaptureDevice::Client> client_; | 98 scoped_ptr<VideoCaptureDevice::Client> client_; |
97 | 99 |
98 base::win::ScopedComPtr<IBaseFilter> capture_filter_; | 100 base::win::ScopedComPtr<IBaseFilter> capture_filter_; |
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115 // Map of all capabilities this device support. | 117 // Map of all capabilities this device support. |
116 CapabilityList capabilities_; | 118 CapabilityList capabilities_; |
117 VideoCaptureFormat capture_format_; | 119 VideoCaptureFormat capture_format_; |
118 | 120 |
119 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin); | 121 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin); |
120 }; | 122 }; |
121 | 123 |
122 } // namespace media | 124 } // namespace media |
123 | 125 |
124 #endif // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ | 126 #endif // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
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