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| 1 // Copyright 2017 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 MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_SYSTEM_H_ |
| 6 #define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_SYSTEM_H_ |
| 7 |
| 8 #include "media/capture/video/video_capture_device_factory.h" |
| 9 #include "media/capture/video/video_capture_device_info.h" |
| 10 |
| 11 namespace media { |
| 12 |
| 13 // Layer on top of VideoCaptureDeviceFactory that translates device descriptors |
| 14 // to string identifiers and consolidates and caches device descriptors and |
| 15 // supported formats into VideoCaptureDeviceInfos. |
| 16 class CAPTURE_EXPORT VideoCaptureSystem { |
| 17 public: |
| 18 using DeviceInfoCallback = |
| 19 base::Callback<void(const std::vector<VideoCaptureDeviceInfo>&)>; |
| 20 |
| 21 explicit VideoCaptureSystem( |
| 22 std::unique_ptr<VideoCaptureDeviceFactory> factory); |
| 23 ~VideoCaptureSystem(); |
| 24 |
| 25 void GetDeviceInfosAsync(const DeviceInfoCallback& result_callback); |
| 26 |
| 27 // Creates a VideoCaptureDevice object. Returns nullptr if something goes |
| 28 // wrong. |
| 29 std::unique_ptr<VideoCaptureDevice> CreateDevice( |
| 30 const std::string& device_id); |
| 31 |
| 32 media::VideoCaptureDeviceFactory* video_capture_device_factory() const { |
| 33 return factory_.get(); |
| 34 } |
| 35 |
| 36 private: |
| 37 void OnDescriptorsReceived( |
| 38 const DeviceInfoCallback& result_callback, |
| 39 std::unique_ptr<VideoCaptureDeviceDescriptors> descriptors); |
| 40 |
| 41 // Returns nullptr if no descriptor found. |
| 42 const VideoCaptureDeviceInfo* LookupDeviceInfoFromId( |
| 43 const std::string& device_id); |
| 44 |
| 45 const std::unique_ptr<VideoCaptureDeviceFactory> factory_; |
| 46 std::vector<VideoCaptureDeviceInfo> devices_info_cache_; |
| 47 }; |
| 48 |
| 49 } // namespace media |
| 50 |
| 51 #endif // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_FACTORY_H_ |
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