blob: 506bae613345761ba2b93a80d3a8e074161bb4bd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Copyright 2020 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef CALL_ADAPTATION_VIDEO_SOURCE_RESTRICTIONS_H_
#define CALL_ADAPTATION_VIDEO_SOURCE_RESTRICTIONS_H_
#include <utility>
#include "absl/types/optional.h"
namespace webrtc {
// Describes optional restrictions to the resolution and frame rate of a video
// source.
class VideoSourceRestrictions {
public:
// Constructs without any restrictions.
VideoSourceRestrictions();
// All values must be positive or nullopt.
// TODO(hbos): Support expressing "disable this stream"?
VideoSourceRestrictions(absl::optional<size_t> max_pixels_per_frame,
absl::optional<size_t> target_pixels_per_frame,
absl::optional<double> max_frame_rate);
bool operator==(const VideoSourceRestrictions& rhs) const {
return max_pixels_per_frame_ == rhs.max_pixels_per_frame_ &&
target_pixels_per_frame_ == rhs.target_pixels_per_frame_ &&
max_frame_rate_ == rhs.max_frame_rate_;
}
bool operator!=(const VideoSourceRestrictions& rhs) const {
return !(*this == rhs);
}
// The source must produce a resolution less than or equal to
// max_pixels_per_frame().
const absl::optional<size_t>& max_pixels_per_frame() const;
// The source should produce a resolution as close to the
// target_pixels_per_frame() as possible, provided this does not exceed
// max_pixels_per_frame().
// The actual pixel count selected depends on the capabilities of the source.
// TODO(hbos): Clarify how "target" is used. One possible implementation: open
// the camera in the smallest resolution that is greater than or equal to the
// target and scale it down to the target if it is greater. Is this an
// accurate description of what this does today, or do we do something else?
const absl::optional<size_t>& target_pixels_per_frame() const;
const absl::optional<double>& max_frame_rate() const;
void set_max_pixels_per_frame(absl::optional<size_t> max_pixels_per_frame);
void set_target_pixels_per_frame(
absl::optional<size_t> target_pixels_per_frame);
void set_max_frame_rate(absl::optional<double> max_frame_rate);
private:
// These map to rtc::VideoSinkWants's |max_pixel_count| and
// |target_pixel_count|.
absl::optional<size_t> max_pixels_per_frame_;
absl::optional<size_t> target_pixels_per_frame_;
absl::optional<double> max_frame_rate_;
};
bool DidRestrictionsIncrease(VideoSourceRestrictions before,
VideoSourceRestrictions after);
bool DidRestrictionsDecrease(VideoSourceRestrictions before,
VideoSourceRestrictions after);
bool DidIncreaseResolution(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after);
bool DidDecreaseResolution(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after);
bool DidIncreaseFrameRate(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after);
bool DidDecreaseFrameRate(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after);
} // namespace webrtc
#endif // CALL_ADAPTATION_VIDEO_SOURCE_RESTRICTIONS_H_
|
