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