blob: 83810bfe3c276eb0022d0b8348fe070881f6a4a2 (
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
|
/*
* Copyright (c) 2013 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/audio_processing/transient/moving_moments.h"
#include <algorithm>
#include "rtc_base/checks.h"
namespace webrtc {
MovingMoments::MovingMoments(size_t length)
: length_(length), queue_(), sum_(0.0), sum_of_squares_(0.0) {
RTC_DCHECK_GT(length, 0);
for (size_t i = 0; i < length; ++i) {
queue_.push(0.0);
}
}
MovingMoments::~MovingMoments() {}
void MovingMoments::CalculateMoments(const float* in,
size_t in_length,
float* first,
float* second) {
RTC_DCHECK(in);
RTC_DCHECK_GT(in_length, 0);
RTC_DCHECK(first);
RTC_DCHECK(second);
for (size_t i = 0; i < in_length; ++i) {
const float old_value = queue_.front();
queue_.pop();
queue_.push(in[i]);
sum_ += in[i] - old_value;
sum_of_squares_ += in[i] * in[i] - old_value * old_value;
first[i] = sum_ / length_;
second[i] = std::max(0.f, sum_of_squares_ / length_);
}
}
} // namespace webrtc
|
