85d8bb025a
BUG=webrtc:5520 Review URL: https://codereview.webrtc.org/1698843003 Cr-Commit-Position: refs/heads/master@{#11645}
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_processing/transient/moving_moments.h"
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#include <math.h>
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#include <string.h>
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#include "webrtc/base/checks.h"
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namespace webrtc {
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MovingMoments::MovingMoments(size_t length)
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: length_(length),
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queue_(),
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sum_(0.0),
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sum_of_squares_(0.0) {
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RTC_DCHECK_GT(length, 0u);
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for (size_t i = 0; i < length; ++i) {
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queue_.push(0.0);
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}
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}
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MovingMoments::~MovingMoments() {}
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void MovingMoments::CalculateMoments(const float* in, size_t in_length,
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float* first, float* second) {
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RTC_DCHECK(in && in_length > 0 && first && second);
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for (size_t i = 0; i < in_length; ++i) {
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const float old_value = queue_.front();
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queue_.pop();
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queue_.push(in[i]);
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sum_ += in[i] - old_value;
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sum_of_squares_ += in[i] * in[i] - old_value * old_value;
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first[i] = sum_ / length_;
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second[i] = sum_of_squares_ / length_;
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}
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}
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} // namespace webrtc
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