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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 // Linux specific implementation of VideoCaptureDevice. | 5 // Linux specific implementation of VideoCaptureDevice. |
6 // V4L2 is used for capturing. V4L2 does not provide its own thread for | 6 // V4L2 is used for capturing. V4L2 does not provide its 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/files/file_util.h" | 15 #include "base/files/file_util.h" |
16 #include "base/files/scoped_file.h" | 16 #include "base/files/scoped_file.h" |
17 #include "base/threading/thread.h" | 17 #include "base/threading/thread.h" |
18 #include "media/base/video_capture_types.h" | 18 #include "media/base/video_capture_types.h" |
19 #include "media/capture/video/video_capture_device.h" | 19 #include "media/capture/video/video_capture_device.h" |
20 | 20 |
21 namespace media { | 21 namespace media { |
22 | 22 |
23 class V4L2CaptureDelegate; | 23 class V4L2CaptureDelegate; |
24 | 24 |
25 // Linux V4L2 implementation of VideoCaptureDevice. | 25 // Linux V4L2 implementation of VideoCaptureDevice. |
26 class VideoCaptureDeviceLinux : public VideoCaptureDevice { | 26 class VideoCaptureDeviceLinux : public VideoCaptureDevice { |
27 public: | 27 public: |
28 static VideoPixelFormat V4l2FourCcToChromiumPixelFormat( | 28 static VideoPixelFormat V4l2FourCcToChromiumPixelFormat(uint32_t v4l2_fourcc); |
29 uint32 v4l2_fourcc); | |
30 static std::list<uint32_t> GetListOfUsableFourCCs(bool favour_mjpeg); | 29 static std::list<uint32_t> GetListOfUsableFourCCs(bool favour_mjpeg); |
31 | 30 |
32 explicit VideoCaptureDeviceLinux(const Name& device_name); | 31 explicit VideoCaptureDeviceLinux(const Name& device_name); |
33 ~VideoCaptureDeviceLinux() override; | 32 ~VideoCaptureDeviceLinux() override; |
34 | 33 |
35 // VideoCaptureDevice implementation. | 34 // VideoCaptureDevice implementation. |
36 void AllocateAndStart(const VideoCaptureParams& params, | 35 void AllocateAndStart(const VideoCaptureParams& params, |
37 scoped_ptr<Client> client) override; | 36 scoped_ptr<Client> client) override; |
38 void StopAndDeAllocate() override; | 37 void StopAndDeAllocate() override; |
39 | 38 |
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51 base::Thread v4l2_thread_; // Thread used for reading data from the device. | 50 base::Thread v4l2_thread_; // Thread used for reading data from the device. |
52 | 51 |
53 const Name device_name_; | 52 const Name device_name_; |
54 | 53 |
55 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceLinux); | 54 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceLinux); |
56 }; | 55 }; |
57 | 56 |
58 } // namespace media | 57 } // namespace media |
59 | 58 |
60 #endif // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ | 59 #endif // MEDIA_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_DEVICE_LINUX_H_ |
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