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db9f7ab9f9
This is a no-op change because rtc::Optional is an alias to absl::optional
This CL generated by running script with parameter 'modules/audio_processing'
find $@ -type f \( -name \*.h -o -name \*.cc \) \
-exec sed -i 's|rtc::Optional|absl::optional|g' {} \+ \
-exec sed -i 's|rtc::nullopt|absl::nullopt|g' {} \+ \
-exec sed -i 's|#include "api/optional.h"|#include "absl/types/optional.h"|' {} \+
find $@ -type f -name BUILD.gn \
-exec sed -r -i 's|"(../)*api:optional"|"//third_party/abseil-cpp/absl/types:optional"|' {} \+;
git cl format
Bug: webrtc:9078
Change-Id: Id29f8de59dba704787c2c38a3d05c60827c181b0
Reviewed-on: https://webrtc-review.googlesource.com/83982
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23653}
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018 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/aec3/skew_estimator.h"
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#include <algorithm>
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#include <numeric>
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namespace webrtc {
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SkewEstimator::SkewEstimator(size_t skew_history_size_log2)
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: skew_history_size_log2_(static_cast<int>(skew_history_size_log2)),
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skew_history_(1ULL << skew_history_size_log2_, 0) {}
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SkewEstimator::~SkewEstimator() = default;
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void SkewEstimator::Reset() {
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skew_ = 0;
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skew_sum_ = 0;
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next_index_ = 0;
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sufficient_skew_stored_ = false;
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std::fill(skew_history_.begin(), skew_history_.end(), 0);
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}
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absl::optional<int> SkewEstimator::GetSkewFromCapture() {
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--skew_;
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skew_sum_ += skew_ - skew_history_[next_index_];
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skew_history_[next_index_] = skew_;
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if (++next_index_ == skew_history_.size()) {
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next_index_ = 0;
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sufficient_skew_stored_ = true;
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}
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const int bias = static_cast<int>(skew_history_.size()) >> 1;
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const int average = (skew_sum_ + bias) >> skew_history_size_log2_;
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return sufficient_skew_stored_ ? absl::optional<int>(average) : absl::nullopt;
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}
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} // namespace webrtc
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