pbos@webrtc.org | 788acd1 | 2014-12-15 09:41:24 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "modules/audio_processing/transient/moving_moments.h" |
pbos@webrtc.org | 788acd1 | 2014-12-15 09:41:24 +0000 | [diff] [blame] | 12 | |
| 13 | #include <math.h> |
| 14 | #include <string.h> |
| 15 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 16 | #include "rtc_base/checks.h" |
pbos@webrtc.org | 788acd1 | 2014-12-15 09:41:24 +0000 | [diff] [blame] | 17 | |
| 18 | namespace webrtc { |
| 19 | |
| 20 | MovingMoments::MovingMoments(size_t length) |
| 21 | : length_(length), |
| 22 | queue_(), |
| 23 | sum_(0.0), |
| 24 | sum_of_squares_(0.0) { |
kwiberg | af476c7 | 2016-11-28 15:21:39 -0800 | [diff] [blame] | 25 | RTC_DCHECK_GT(length, 0); |
pbos@webrtc.org | 788acd1 | 2014-12-15 09:41:24 +0000 | [diff] [blame] | 26 | for (size_t i = 0; i < length; ++i) { |
| 27 | queue_.push(0.0); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | MovingMoments::~MovingMoments() {} |
| 32 | |
| 33 | void MovingMoments::CalculateMoments(const float* in, size_t in_length, |
| 34 | float* first, float* second) { |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 35 | RTC_DCHECK(in); |
| 36 | RTC_DCHECK_GT(in_length, 0); |
| 37 | RTC_DCHECK(first); |
| 38 | RTC_DCHECK(second); |
pbos@webrtc.org | 788acd1 | 2014-12-15 09:41:24 +0000 | [diff] [blame] | 39 | |
| 40 | for (size_t i = 0; i < in_length; ++i) { |
| 41 | const float old_value = queue_.front(); |
| 42 | queue_.pop(); |
| 43 | queue_.push(in[i]); |
| 44 | |
| 45 | sum_ += in[i] - old_value; |
| 46 | sum_of_squares_ += in[i] * in[i] - old_value * old_value; |
| 47 | first[i] = sum_ / length_; |
| 48 | second[i] = sum_of_squares_ / length_; |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | } // namespace webrtc |