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a680a6a4af
Targets: base_jni, internal_jni, video_jni, vp8_jni and vp9_jni Bug: webrtc:163 Change-Id: I4aa68c81e6e7cbe5fdf78c90e464b46c55633252 Reviewed-on: https://webrtc-review.googlesource.com/66820 Commit-Queue: Paulina Hensman <phensman@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22744}
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*
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* Copyright (c) 2016 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/video_coding/utility/moving_average.h"
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#include <algorithm>
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namespace webrtc {
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MovingAverage::MovingAverage(size_t s) : sum_history_(s + 1, 0) {}
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MovingAverage::~MovingAverage() = default;
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void MovingAverage::AddSample(int sample) {
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count_++;
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sum_ += sample;
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sum_history_[count_ % sum_history_.size()] = sum_;
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}
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rtc::Optional<int> MovingAverage::GetAverage() const {
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return GetAverage(size());
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}
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rtc::Optional<int> MovingAverage::GetAverage(size_t num_samples) const {
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if (num_samples > size() || num_samples == 0)
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return rtc::nullopt;
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int sum = sum_ - sum_history_[(count_ - num_samples) % sum_history_.size()];
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return sum / static_cast<int>(num_samples);
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}
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void MovingAverage::Reset() {
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count_ = 0;
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sum_ = 0;
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std::fill(sum_history_.begin(), sum_history_.end(), 0);
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}
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size_t MovingAverage::size() const {
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return std::min(count_, sum_history_.size() - 1);
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}
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} // namespace webrtc
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