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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ | 5 #ifndef MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ |
6 #define MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ | 6 #define MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include "base/files/scoped_file.h" | 11 #include "base/files/scoped_file.h" |
12 #include "base/macros.h" | 12 #include "base/macros.h" |
13 #include "base/memory/ref_counted.h" | |
14 #include "build/build_config.h" | 13 #include "build/build_config.h" |
15 #include "media/capture/video/video_capture_device.h" | 14 #include "media/capture/video/video_capture_device.h" |
16 | 15 |
17 #if defined(OS_OPENBSD) | 16 #if defined(OS_OPENBSD) |
18 #include <sys/videoio.h> | 17 #include <sys/videoio.h> |
19 #else | 18 #else |
20 #include <linux/videodev2.h> | 19 #include <linux/videodev2.h> |
21 #endif | 20 #endif |
22 | 21 |
23 namespace tracked_objects { | 22 namespace tracked_objects { |
24 class Location; | 23 class Location; |
25 } // namespace tracked_objects | 24 } // namespace tracked_objects |
26 | 25 |
27 namespace media { | 26 namespace media { |
28 | 27 |
29 // Class doing the actual Linux capture using V4L2 API. V4L2 SPLANE/MPLANE | 28 // Class doing the actual Linux capture using V4L2 API. V4L2 SPLANE/MPLANE |
30 // capture specifics are implemented in derived classes. Created and destroyed | 29 // capture specifics are implemented in derived classes. Created on the owner's |
31 // on the owner's thread, otherwise living and operating on |v4l2_task_runner_|. | 30 // thread, otherwise living, operating and destroyed on |v4l2_task_runner_|. |
32 // TODO(mcasas): Make this class a non-ref-counted. | 31 class CAPTURE_EXPORT V4L2CaptureDelegate final { |
33 class CAPTURE_EXPORT V4L2CaptureDelegate final | |
34 : public base::RefCountedThreadSafe<V4L2CaptureDelegate> { | |
35 public: | 32 public: |
36 // Retrieves the #planes for a given |fourcc|, or 0 if unknown. | 33 // Retrieves the #planes for a given |fourcc|, or 0 if unknown. |
37 static size_t GetNumPlanesForFourCc(uint32_t fourcc); | 34 static size_t GetNumPlanesForFourCc(uint32_t fourcc); |
38 // Returns the Chrome pixel format for |v4l2_fourcc| or PIXEL_FORMAT_UNKNOWN. | 35 // Returns the Chrome pixel format for |v4l2_fourcc| or PIXEL_FORMAT_UNKNOWN. |
39 static VideoPixelFormat V4l2FourCcToChromiumPixelFormat( | 36 static VideoPixelFormat V4l2FourCcToChromiumPixelFormat( |
40 uint32_t v4l2_fourcc); | 37 uint32_t v4l2_fourcc); |
41 | 38 |
42 // Composes a list of usable and supported pixel formats, in order of | 39 // Composes a list of usable and supported pixel formats, in order of |
43 // preference, with MJPEG prioritised depending on |prefer_mjpeg|. | 40 // preference, with MJPEG prioritised depending on |prefer_mjpeg|. |
44 static std::list<uint32_t> GetListOfUsableFourCcs(bool prefer_mjpeg); | 41 static std::list<uint32_t> GetListOfUsableFourCcs(bool prefer_mjpeg); |
45 | 42 |
46 V4L2CaptureDelegate( | 43 V4L2CaptureDelegate( |
47 const VideoCaptureDeviceDescriptor& device_descriptor, | 44 const VideoCaptureDeviceDescriptor& device_descriptor, |
48 const scoped_refptr<base::SingleThreadTaskRunner>& v4l2_task_runner, | 45 const scoped_refptr<base::SingleThreadTaskRunner>& v4l2_task_runner, |
49 int power_line_frequency); | 46 int power_line_frequency); |
| 47 ~V4L2CaptureDelegate(); |
50 | 48 |
51 // Forward-to versions of VideoCaptureDevice virtual methods. | 49 // Forward-to versions of VideoCaptureDevice virtual methods. |
52 void AllocateAndStart(int width, | 50 void AllocateAndStart(int width, |
53 int height, | 51 int height, |
54 float frame_rate, | 52 float frame_rate, |
55 std::unique_ptr<VideoCaptureDevice::Client> client); | 53 std::unique_ptr<VideoCaptureDevice::Client> client); |
56 void StopAndDeAllocate(); | 54 void StopAndDeAllocate(); |
57 | 55 |
58 void TakePhoto(VideoCaptureDevice::TakePhotoCallback callback); | 56 void TakePhoto(VideoCaptureDevice::TakePhotoCallback callback); |
59 | 57 |
60 void GetPhotoCapabilities( | 58 void GetPhotoCapabilities( |
61 VideoCaptureDevice::GetPhotoCapabilitiesCallback callback); | 59 VideoCaptureDevice::GetPhotoCapabilitiesCallback callback); |
62 void SetPhotoOptions(mojom::PhotoSettingsPtr settings, | 60 void SetPhotoOptions(mojom::PhotoSettingsPtr settings, |
63 VideoCaptureDevice::SetPhotoOptionsCallback callback); | 61 VideoCaptureDevice::SetPhotoOptionsCallback callback); |
64 | 62 |
65 void SetRotation(int rotation); | 63 void SetRotation(int rotation); |
66 | 64 |
| 65 base::WeakPtr<V4L2CaptureDelegate> GetWeakPtr(); |
| 66 |
67 private: | 67 private: |
68 friend class V4L2CaptureDelegateTest; | 68 friend class V4L2CaptureDelegateTest; |
69 | 69 |
70 friend class base::RefCountedThreadSafe<V4L2CaptureDelegate>; | |
71 ~V4L2CaptureDelegate(); | |
72 | |
73 class BufferTracker; | 70 class BufferTracker; |
74 | 71 |
75 // VIDIOC_QUERYBUFs a buffer from V4L2, creates a BufferTracker for it and | 72 // VIDIOC_QUERYBUFs a buffer from V4L2, creates a BufferTracker for it and |
76 // enqueues it (VIDIOC_QBUF) back into V4L2. | 73 // enqueues it (VIDIOC_QBUF) back into V4L2. |
77 bool MapAndQueueBuffer(int index); | 74 bool MapAndQueueBuffer(int index); |
78 | 75 |
79 void DoCapture(); | 76 void DoCapture(); |
80 | 77 |
81 void SetErrorState(const tracked_objects::Location& from_here, | 78 void SetErrorState(const tracked_objects::Location& from_here, |
82 const std::string& reason); | 79 const std::string& reason); |
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97 std::vector<scoped_refptr<BufferTracker>> buffer_tracker_pool_; | 94 std::vector<scoped_refptr<BufferTracker>> buffer_tracker_pool_; |
98 | 95 |
99 bool is_capturing_; | 96 bool is_capturing_; |
100 int timeout_count_; | 97 int timeout_count_; |
101 | 98 |
102 base::TimeTicks first_ref_time_; | 99 base::TimeTicks first_ref_time_; |
103 | 100 |
104 // Clockwise rotation in degrees. This value should be 0, 90, 180, or 270. | 101 // Clockwise rotation in degrees. This value should be 0, 90, 180, or 270. |
105 int rotation_; | 102 int rotation_; |
106 | 103 |
| 104 base::WeakPtrFactory<V4L2CaptureDelegate> weak_factory_; |
| 105 |
107 DISALLOW_COPY_AND_ASSIGN(V4L2CaptureDelegate); | 106 DISALLOW_COPY_AND_ASSIGN(V4L2CaptureDelegate); |
108 }; | 107 }; |
109 | 108 |
110 } // namespace media | 109 } // namespace media |
111 | 110 |
112 #endif // MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ | 111 #endif // MEDIA_CAPTURE_VIDEO_LINUX_V4L2_CAPTURE_DELEGATE_H_ |
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