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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 // Linux specific implementation of VideoCaptureDevice. | 5 // Linux specific implementation of VideoCaptureDevice. |
| 6 // V4L2 is used for capturing. V4L2 does not provide it's own thread for | 6 // V4L2 is used for capturing. V4L2 does not provide it's own thread for |
| 7 // capturing so this implementation uses a Chromium thread for fetching frames | 7 // capturing so this implementation uses a Chromium thread for fetching frames |
| 8 // from V4L2. | 8 // from V4L2. |
| 9 | 9 |
| 10 #ifndef MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ | 10 #ifndef MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ |
| 11 #define MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ | 11 #define MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ |
| 12 | 12 |
| 13 #include <string> | 13 #include <string> |
| 14 | 14 |
| 15 #include "base/threading/thread.h" | 15 #include "base/threading/thread.h" |
| 16 #include "media/video/capture/video_capture_device.h" | 16 #include "media/video/capture/video_capture_device.h" |
| 17 | 17 |
| 18 namespace media { | 18 namespace media { |
| 19 | 19 |
| 20 class VideoCaptureDeviceLinux : public VideoCaptureDevice { | 20 class VideoCaptureDeviceLinux : public VideoCaptureDevice { |
| 21 public: | 21 public: |
| 22 explicit VideoCaptureDeviceLinux(const Name& device_name); | 22 explicit VideoCaptureDeviceLinux(const Name& device_name); |
| 23 virtual ~VideoCaptureDeviceLinux(); | 23 virtual ~VideoCaptureDeviceLinux(); |
| 24 | 24 |
| 25 // VideoCaptureDevice implementation. | 25 // VideoCaptureDevice implementation. |
| 26 virtual void Allocate(int width, | 26 virtual void Allocate(int width, |
| 27 int height, | 27 int height, |
| 28 int frame_rate, | 28 int frame_rate, |
| 29 EventHandler* observer); | 29 EventHandler* observer) OVERRIDE; |
| 30 virtual void Start(); | 30 virtual void Start() OVERRIDE; |
| 31 virtual void Stop(); | 31 virtual void Stop() OVERRIDE; |
| 32 virtual void DeAllocate(); | 32 virtual void DeAllocate() OVERRIDE; |
| 33 virtual const Name& device_name(); | 33 virtual const Name& device_name() OVERRIDE; |
| 34 | 34 |
| 35 private: | 35 private: |
| 36 enum InternalState { | 36 enum InternalState { |
| 37 kIdle, // The device driver is opened but camera is not in use. | 37 kIdle, // The device driver is opened but camera is not in use. |
| 38 kAllocated, // The camera has been allocated and can be started. | 38 kAllocated, // The camera has been allocated and can be started. |
| 39 kCapturing, // Video is being captured. | 39 kCapturing, // Video is being captured. |
| 40 kError // Error accessing HW functions. | 40 kError // Error accessing HW functions. |
| 41 // User needs to recover by destroying the object. | 41 // User needs to recover by destroying the object. |
| 42 }; | 42 }; |
| 43 | 43 |
| (...skipping 27 matching lines...) Expand all Loading... |
| 71 int buffer_pool_size_; // Number of allocated buffers. | 71 int buffer_pool_size_; // Number of allocated buffers. |
| 72 | 72 |
| 73 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceLinux); | 73 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceLinux); |
| 74 }; | 74 }; |
| 75 | 75 |
| 76 } // namespace media | 76 } // namespace media |
| 77 | 77 |
| 78 DISABLE_RUNNABLE_METHOD_REFCOUNT(media::VideoCaptureDeviceLinux); | 78 DISABLE_RUNNABLE_METHOD_REFCOUNT(media::VideoCaptureDeviceLinux); |
| 79 | 79 |
| 80 #endif // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ | 80 #endif // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ |
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