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This CL adds code for doing signal-dependent downmixing before the delay estimation in the multichannel case. As part of the CL, the unittests of the render delay controller are corrected. However, as that caused some of them to fail, the CL (for now) as well disables the failing test. Bug: webrtc:11153,chromium:1029740, webrtc:11161 Change-Id: I0b765c28fa5e547aabd6dfbd24b626ff9a16346f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161045 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29980}
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(const 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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