2a99c0bf67
Protect from negative second moments, which are unexpected in TransientDetector::Detect and may lead to invalid results. Bug: chromium:866925 Change-Id: Id1d5b2ebb51e54d9d332b869c6f63dcd03cc461c Reviewed-on: https://webrtc-review.googlesource.com/91164 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24153}
51 lines
1.4 KiB
C++
51 lines
1.4 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 "modules/audio_processing/transient/moving_moments.h"
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#include <cmath>
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#include "rtc_base/checks.h"
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namespace webrtc {
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MovingMoments::MovingMoments(size_t length)
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: length_(length), queue_(), sum_(0.0), sum_of_squares_(0.0) {
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RTC_DCHECK_GT(length, 0);
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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,
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size_t in_length,
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float* first,
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float* second) {
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RTC_DCHECK(in);
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RTC_DCHECK_GT(in_length, 0);
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RTC_DCHECK(first);
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RTC_DCHECK(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] = std::max(0.f, sum_of_squares_ / length_);
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}
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}
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} // namespace webrtc
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