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Side by Side Diff: media/base/video_capturer_source.h

Issue 1315993003: Reland: Change VideoCaptureDeliverFrameCB's signature (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: address new changes Created 5 years, 3 months ago
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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. 1 // Copyright (c) 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_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_ 5 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_
6 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_ 6 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_
7 7
8 #include <string> 8 #include <string>
9 #include <vector> 9 #include <vector>
10 10
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33 // implementation should not present the frame before this point-in-time. This 33 // implementation should not present the frame before this point-in-time. This
34 // value is NOT a high-resolution timestamp, and so it should not be used as a 34 // value is NOT a high-resolution timestamp, and so it should not be used as a
35 // presentation time; but, instead, it should be used for buffering playback 35 // presentation time; but, instead, it should be used for buffering playback
36 // and for A/V synchronization purposes. NOTE: It is possible for this value 36 // and for A/V synchronization purposes. NOTE: It is possible for this value
37 // to be null if the current implementation lacks this timing information. 37 // to be null if the current implementation lacks this timing information.
38 // 38 //
39 // |video_frame->timestamp()| gives the presentation timestamp of the video 39 // |video_frame->timestamp()| gives the presentation timestamp of the video
40 // frame relative to the first frame generated by the corresponding source. 40 // frame relative to the first frame generated by the corresponding source.
41 // Because a source can start generating frames before a subscriber is added, 41 // Because a source can start generating frames before a subscriber is added,
42 // the first video frame delivered may not have timestamp equal to 0. 42 // the first video frame delivered may not have timestamp equal to 0.
43 typedef base::Callback< 43 typedef base::Callback<void(
44 void(const scoped_refptr<media::VideoFrame>& video_frame, 44 const scoped_refptr<media::VideoFrame>& video_frame,
45 const base::TimeTicks& estimated_capture_time)> 45 base::TimeTicks estimated_capture_time)> VideoCaptureDeliverFrameCB;
46 VideoCaptureDeliverFrameCB;
47 46
48 typedef base::Callback<void(const media::VideoCaptureFormats&)> 47 typedef base::Callback<void(const media::VideoCaptureFormats&)>
49 VideoCaptureDeviceFormatsCB; 48 VideoCaptureDeviceFormatsCB;
50 49
51 typedef base::Callback<void(bool)> RunningCallback; 50 typedef base::Callback<void(bool)> RunningCallback;
52 51
53 // Collects the formats that can currently be used. 52 // Collects the formats that can currently be used.
54 // |max_requested_height|, |max_requested_width|, and 53 // |max_requested_height|, |max_requested_width|, and
55 // |max_requested_frame_rate| is used by Tab and Screen capture to decide what 54 // |max_requested_frame_rate| is used by Tab and Screen capture to decide what
56 // resolution/framerate to generate. |callback| is triggered when the formats 55 // resolution/framerate to generate. |callback| is triggered when the formats
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81 // Stops capturing frames and clears all callbacks including the 80 // Stops capturing frames and clears all callbacks including the
82 // SupportedFormatsCallback callback. Note that queued frame callbacks 81 // SupportedFormatsCallback callback. Note that queued frame callbacks
83 // may still occur after this call, so the caller must take care to 82 // may still occur after this call, so the caller must take care to
84 // use refcounted or weak references in |new_frame_callback|. 83 // use refcounted or weak references in |new_frame_callback|.
85 virtual void StopCapture() = 0; 84 virtual void StopCapture() = 0;
86 }; 85 };
87 86
88 } // namespace media 87 } // namespace media
89 88
90 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_ 89 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURER_SOURCE_H_
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