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1e157a9596
This CL removes even more top-level const from parameters in function declarations. This change is safe because top-level const in function declarations (not function definitions) are ignored by the compiler and so change is just a no-op cleanup. Bug: webrtc:13610 Change-Id: Icf6868c27b1fdb9d9915b3a7020eb34bdcf07a09 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249989 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Ali Tofigh <alito@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35866}
58 lines
2 KiB
C++
58 lines
2 KiB
C++
/*
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* Copyright (c) 2019 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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#ifndef MODULES_AUDIO_PROCESSING_AEC3_ALIGNMENT_MIXER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_ALIGNMENT_MIXER_H_
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#include <vector>
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#include "api/array_view.h"
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#include "api/audio/echo_canceller3_config.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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// Performs channel conversion to mono for the purpose of providing a decent
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// mono input for the delay estimation. This is achieved by analyzing all
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// incoming channels and produce one single channel output.
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class AlignmentMixer {
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public:
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AlignmentMixer(size_t num_channels,
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const EchoCanceller3Config::Delay::AlignmentMixing& config);
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AlignmentMixer(size_t num_channels,
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bool downmix,
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bool adaptive_selection,
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float excitation_limit,
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bool prefer_first_two_channels);
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void ProduceOutput(rtc::ArrayView<const std::vector<float>> x,
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rtc::ArrayView<float, kBlockSize> y);
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enum class MixingVariant { kDownmix, kAdaptive, kFixed };
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private:
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const size_t num_channels_;
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const float one_by_num_channels_;
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const float excitation_energy_threshold_;
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const bool prefer_first_two_channels_;
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const MixingVariant selection_variant_;
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std::array<size_t, 2> strong_block_counters_;
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std::vector<float> cumulative_energies_;
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int selected_channel_ = 0;
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size_t block_counter_ = 0;
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void Downmix(rtc::ArrayView<const std::vector<float>> x,
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rtc::ArrayView<float, kBlockSize> y) const;
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int SelectChannel(rtc::ArrayView<const std::vector<float>> x);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_ALIGNMENT_MIXER_H_
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