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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. DirectShow is used for | 5 // Windows specific implementation of VideoCaptureDevice. DirectShow is used for |
| 6 // capturing. DirectShow provide its own threads for capturing. | 6 // capturing. DirectShow provide its own threads for capturing. |
| 7 | 7 |
| 8 #ifndef MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ | 8 #ifndef MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
| 9 #define MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ | 9 #define MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
| 10 | 10 |
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| 57 | 57 |
| 58 static HRESULT GetDeviceFilter(const std::string& device_id, | 58 static HRESULT GetDeviceFilter(const std::string& device_id, |
| 59 IBaseFilter** filter); | 59 IBaseFilter** filter); |
| 60 static base::win::ScopedComPtr<IPin> GetPin(IBaseFilter* filter, | 60 static base::win::ScopedComPtr<IPin> GetPin(IBaseFilter* filter, |
| 61 PIN_DIRECTION pin_dir, | 61 PIN_DIRECTION pin_dir, |
| 62 REFGUID category, | 62 REFGUID category, |
| 63 REFGUID major_type); | 63 REFGUID major_type); |
| 64 static VideoPixelFormat TranslateMediaSubtypeToPixelFormat( | 64 static VideoPixelFormat TranslateMediaSubtypeToPixelFormat( |
| 65 const GUID& sub_type); | 65 const GUID& sub_type); |
| 66 | 66 |
| 67 explicit VideoCaptureDeviceWin(const Name& device_name); | 67 explicit VideoCaptureDeviceWin( |
| 68 const VideoCaptureDeviceDescriptor& device_descriptor); |
| 68 ~VideoCaptureDeviceWin() override; | 69 ~VideoCaptureDeviceWin() override; |
| 69 // Opens the device driver for this device. | 70 // Opens the device driver for this device. |
| 70 bool Init(); | 71 bool Init(); |
| 71 | 72 |
| 72 // VideoCaptureDevice implementation. | 73 // VideoCaptureDevice implementation. |
| 73 void AllocateAndStart( | 74 void AllocateAndStart( |
| 74 const VideoCaptureParams& params, | 75 const VideoCaptureParams& params, |
| 75 std::unique_ptr<VideoCaptureDevice::Client> client) override; | 76 std::unique_ptr<VideoCaptureDevice::Client> client) override; |
| 76 void StopAndDeAllocate() override; | 77 void StopAndDeAllocate() override; |
| 77 | 78 |
| 78 private: | 79 private: |
| 79 enum InternalState { | 80 enum InternalState { |
| 80 kIdle, // The device driver is opened but camera is not in use. | 81 kIdle, // The device driver is opened but camera is not in use. |
| 81 kCapturing, // Video is being captured. | 82 kCapturing, // Video is being captured. |
| 82 kError // Error accessing HW functions. | 83 kError // Error accessing HW functions. |
| 83 // User needs to recover by destroying the object. | 84 // User needs to recover by destroying the object. |
| 84 }; | 85 }; |
| 85 | 86 |
| 86 // Implements SinkFilterObserver. | 87 // Implements SinkFilterObserver. |
| 87 void FrameReceived(const uint8_t* buffer, | 88 void FrameReceived(const uint8_t* buffer, |
| 88 int length, | 89 int length, |
| 89 base::TimeDelta timestamp) override; | 90 base::TimeDelta timestamp) override; |
| 90 | 91 |
| 91 bool CreateCapabilityMap(); | 92 bool CreateCapabilityMap(); |
| 92 void SetAntiFlickerInCaptureFilter(const VideoCaptureParams& params); | 93 void SetAntiFlickerInCaptureFilter(const VideoCaptureParams& params); |
| 93 void SetErrorState(const tracked_objects::Location& from_here, | 94 void SetErrorState(const tracked_objects::Location& from_here, |
| 94 const std::string& reason); | 95 const std::string& reason); |
| 95 | 96 |
| 96 const Name device_name_; | 97 const VideoCaptureDeviceDescriptor device_descriptor_; |
| 97 InternalState state_; | 98 InternalState state_; |
| 98 std::unique_ptr<VideoCaptureDevice::Client> client_; | 99 std::unique_ptr<VideoCaptureDevice::Client> client_; |
| 99 | 100 |
| 100 base::win::ScopedComPtr<IBaseFilter> capture_filter_; | 101 base::win::ScopedComPtr<IBaseFilter> capture_filter_; |
| 101 | 102 |
| 102 base::win::ScopedComPtr<IGraphBuilder> graph_builder_; | 103 base::win::ScopedComPtr<IGraphBuilder> graph_builder_; |
| 103 base::win::ScopedComPtr<ICaptureGraphBuilder2> capture_graph_builder_; | 104 base::win::ScopedComPtr<ICaptureGraphBuilder2> capture_graph_builder_; |
| 104 | 105 |
| 105 base::win::ScopedComPtr<IMediaControl> media_control_; | 106 base::win::ScopedComPtr<IMediaControl> media_control_; |
| 106 base::win::ScopedComPtr<IPin> input_sink_pin_; | 107 base::win::ScopedComPtr<IPin> input_sink_pin_; |
| 107 base::win::ScopedComPtr<IPin> output_capture_pin_; | 108 base::win::ScopedComPtr<IPin> output_capture_pin_; |
| 108 | 109 |
| 109 scoped_refptr<SinkFilter> sink_filter_; | 110 scoped_refptr<SinkFilter> sink_filter_; |
| 110 | 111 |
| 111 // Map of all capabilities this device support. | 112 // Map of all capabilities this device support. |
| 112 CapabilityList capabilities_; | 113 CapabilityList capabilities_; |
| 113 VideoCaptureFormat capture_format_; | 114 VideoCaptureFormat capture_format_; |
| 114 | 115 |
| 115 base::TimeTicks first_ref_time_; | 116 base::TimeTicks first_ref_time_; |
| 116 | 117 |
| 117 base::ThreadChecker thread_checker_; | 118 base::ThreadChecker thread_checker_; |
| 118 | 119 |
| 119 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin); | 120 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin); |
| 120 }; | 121 }; |
| 121 | 122 |
| 122 } // namespace media | 123 } // namespace media |
| 123 | 124 |
| 124 #endif // MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ | 125 #endif // MEDIA_CAPTURE_VIDEO_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_ |
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