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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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