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Side by Side Diff: media/video/capture/video_capture_device.h

Issue 10035054: Merge VideoCaptureDevice::Capability with media::VideoCaptureCapability (Closed) Base URL: http://git.chromium.org/chromium/src.git@master
Patch Set: fix a namespace issue Created 8 years, 7 months ago
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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 // VideoCaptureDevice is the abstract base class for realizing video capture 5 // VideoCaptureDevice is the abstract base class for realizing video capture
6 // device support in Chromium. It provides the interface for OS dependent 6 // device support in Chromium. It provides the interface for OS dependent
7 // implementations. 7 // implementations.
8 // The class is created and functions are invoked on a thread owned by 8 // The class is created and functions are invoked on a thread owned by
9 // VideoCaptureManager. Capturing is done on other threads depended on the OS 9 // VideoCaptureManager. Capturing is done on other threads depended on the OS
10 // specific implementation. 10 // specific implementation.
11 11
12 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_ 12 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_
13 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_ 13 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_
14 14
15 #include <list> 15 #include <list>
16 #include <string> 16 #include <string>
17 17
18 #include "base/time.h" 18 #include "base/time.h"
19 #include "media/base/media_export.h" 19 #include "media/base/media_export.h"
20 #include "media/video/capture/video_capture_types.h"
20 21
21 namespace media { 22 namespace media {
22 23
23 class MEDIA_EXPORT VideoCaptureDevice { 24 class MEDIA_EXPORT VideoCaptureDevice {
24 public: 25 public:
25 26
26 struct Name { 27 struct Name {
27 // Friendly name of a device 28 // Friendly name of a device
28 std::string device_name; 29 std::string device_name;
29 30
30 // Unique name of a device. Even if there are multiple devices with the same 31 // Unique name of a device. Even if there are multiple devices with the same
31 // friendly name connected to the computer this will be unique. 32 // friendly name connected to the computer this will be unique.
32 std::string unique_id; 33 std::string unique_id;
33 }; 34 };
34 typedef std::list<Name> Names; 35 typedef std::list<Name> Names;
35 36
36 // Color formats from camera.
37 enum Format {
38 kColorUnknown, // Color format not set.
39 kI420,
40 kYUY2,
41 kUYVY,
42 kRGB24,
43 kARGB,
44 kMJPEG, // Currently only supported on Windows.
45 kNV21,
46 kYV12,
47 };
48
49 // Describes the format a camera capture video in.
50 struct Capability {
51 Capability()
52 : width(0),
53 height(0),
54 frame_rate(0),
55 color(kColorUnknown) {}
56 int width;
57 int height;
58 int frame_rate;
59 Format color;
60 };
61
62 class EventHandler { 37 class EventHandler {
63 public: 38 public:
64 // Captured a new video frame. 39 // Captured a new video frame.
65 virtual void OnIncomingCapturedFrame(const uint8* data, 40 virtual void OnIncomingCapturedFrame(const uint8* data,
66 int length, 41 int length,
67 base::Time timestamp) = 0; 42 base::Time timestamp) = 0;
68 // An error has occurred that can not be handled 43 // An error has occurred that can not be handled
69 // and VideoCaptureDevice must be DeAllocated. 44 // and VideoCaptureDevice must be DeAllocated.
70 virtual void OnError() = 0; 45 virtual void OnError() = 0;
71 // Called when VideoCaptureDevice::Allocate has been called 46 // Called when VideoCaptureDevice::Allocate has been called
72 // to inform of the resulting frame size and color format. 47 // to inform of the resulting frame size and color format.
73 virtual void OnFrameInfo(const Capability& info) = 0; 48 virtual void OnFrameInfo(const VideoCaptureCapability& info) = 0;
74 49
75 protected: 50 protected:
76 virtual ~EventHandler() {} 51 virtual ~EventHandler() {}
77 }; 52 };
78 // Creates a VideoCaptureDevice object. 53 // Creates a VideoCaptureDevice object.
79 // Return NULL if the hardware is not available. 54 // Return NULL if the hardware is not available.
80 static VideoCaptureDevice* Create(const Name& device_name); 55 static VideoCaptureDevice* Create(const Name& device_name);
81 virtual ~VideoCaptureDevice() {} 56 virtual ~VideoCaptureDevice() {}
82 57
83 // Gets the names of all video capture devices connected to this computer. 58 // Gets the names of all video capture devices connected to this computer.
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104 // state it was when created. 79 // state it was when created.
105 virtual void DeAllocate() = 0; 80 virtual void DeAllocate() = 0;
106 81
107 // Get the name of the capture device. 82 // Get the name of the capture device.
108 virtual const Name& device_name() = 0; 83 virtual const Name& device_name() = 0;
109 }; 84 };
110 85
111 } // namespace media 86 } // namespace media
112 87
113 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_ 88 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_
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