blob: 5978adc3c48fe4d3dcc46b26644acd99dbda7a47 (
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
84
85
|
/*
* Copyright (c) 2018 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.
*/
#include "modules/video_coding/utility/framerate_controller_deprecated.h"
#include <stddef.h>
#include <cstdint>
namespace webrtc {
FramerateControllerDeprecated::FramerateControllerDeprecated(
float target_framerate_fps)
: min_frame_interval_ms_(0), framerate_estimator_(1000.0, 1000.0) {
SetTargetRate(target_framerate_fps);
}
void FramerateControllerDeprecated::SetTargetRate(float target_framerate_fps) {
if (target_framerate_fps_ != target_framerate_fps) {
framerate_estimator_.Reset();
if (last_timestamp_ms_) {
framerate_estimator_.Update(1, *last_timestamp_ms_);
}
const size_t target_frame_interval_ms = 1000 / target_framerate_fps;
target_framerate_fps_ = target_framerate_fps;
min_frame_interval_ms_ = 85 * target_frame_interval_ms / 100;
}
}
float FramerateControllerDeprecated::GetTargetRate() {
return *target_framerate_fps_;
}
void FramerateControllerDeprecated::Reset() {
framerate_estimator_.Reset();
last_timestamp_ms_.reset();
}
bool FramerateControllerDeprecated::DropFrame(uint32_t timestamp_ms) const {
if (timestamp_ms < last_timestamp_ms_) {
// Timestamp jumps backward. We can't make adequate drop decision. Don't
// drop this frame. Stats will be reset in AddFrame().
return false;
}
if (Rate(timestamp_ms).value_or(*target_framerate_fps_) >
target_framerate_fps_) {
return true;
}
if (last_timestamp_ms_) {
const int64_t diff_ms =
static_cast<int64_t>(timestamp_ms) - *last_timestamp_ms_;
if (diff_ms < min_frame_interval_ms_) {
return true;
}
}
return false;
}
void FramerateControllerDeprecated::AddFrame(uint32_t timestamp_ms) {
if (timestamp_ms < last_timestamp_ms_) {
// Timestamp jumps backward.
Reset();
}
framerate_estimator_.Update(1, timestamp_ms);
last_timestamp_ms_ = timestamp_ms;
}
absl::optional<float> FramerateControllerDeprecated::Rate(
uint32_t timestamp_ms) const {
return framerate_estimator_.Rate(timestamp_ms);
}
} // namespace webrtc
|
