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| 1 // Copyright 2014 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_DEVICE_FACTORY_H_ | |
| 6 #define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_FACTORY_H_ | |
| 7 | |
| 8 #include "base/macros.h" | |
| 9 #include "base/threading/thread_checker.h" | |
| 10 #include "media/capture/video/video_capture_device.h" | |
| 11 | |
| 12 namespace media { | |
| 13 | |
| 14 // VideoCaptureDeviceFactory is the base class for creation of video capture | |
| 15 // devices in the different platforms. VCDFs are created by MediaStreamManager | |
| 16 // on IO thread and plugged into VideoCaptureManager, who owns and operates them | |
| 17 // in Device Thread (a.k.a. Audio Thread). | |
| 18 class CAPTURE_EXPORT VideoCaptureDeviceFactory { | |
| 19 public: | |
| 20 static std::unique_ptr<VideoCaptureDeviceFactory> CreateFactory( | |
| 21 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner); | |
| 22 | |
| 23 VideoCaptureDeviceFactory(); | |
| 24 virtual ~VideoCaptureDeviceFactory(); | |
| 25 | |
| 26 // Creates a VideoCaptureDevice object. Returns NULL if something goes wrong. | |
| 27 virtual std::unique_ptr<VideoCaptureDevice> Create( | |
| 28 const VideoCaptureDevice::Name& device_name) = 0; | |
| 29 | |
| 30 // Asynchronous version of GetDeviceNames calling back to |callback|. | |
| 31 virtual void EnumerateDeviceNames( | |
| 32 const base::Callback< | |
| 33 void(std::unique_ptr<media::VideoCaptureDevice::Names>)>& callback); | |
| 34 | |
| 35 // Gets the supported formats of a particular device attached to the system. | |
| 36 // This method should be called before allocating or starting a device. In | |
| 37 // case format enumeration is not supported, or there was a problem, the | |
| 38 // formats array will be empty. | |
| 39 virtual void GetDeviceSupportedFormats( | |
| 40 const VideoCaptureDevice::Name& device, | |
| 41 VideoCaptureFormats* supported_formats) = 0; | |
| 42 | |
| 43 protected: | |
| 44 // Gets the names of all video capture devices connected to this computer. | |
| 45 // Used by the default implementation of EnumerateDeviceNames(). | |
| 46 virtual void GetDeviceNames(VideoCaptureDevice::Names* device_names) = 0; | |
| 47 | |
| 48 base::ThreadChecker thread_checker_; | |
| 49 | |
| 50 private: | |
| 51 static VideoCaptureDeviceFactory* CreateVideoCaptureDeviceFactory( | |
| 52 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner); | |
| 53 | |
| 54 DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceFactory); | |
| 55 }; | |
| 56 | |
| 57 } // namespace media | |
| 58 | |
| 59 #endif // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_FACTORY_H_ | |
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