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d8d09c3c5a
This CL adds a number of kill-switches to the AEC3 code to be used as safe fallbacks to increase AEC transparency. The changes have been shown to be bitexact for a test dataset. Bug: webrtc:11475,chromium:1066836 Change-Id: Ibebcbbfbbd958cb6fcc6993247e3030fa65b582c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172600 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30964}
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* Copyright (c) 2017 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_RESIDUAL_ECHO_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_RESIDUAL_ECHO_ESTIMATOR_H_
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#include <array>
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#include <memory>
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#include "absl/types/optional.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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#include "modules/audio_processing/aec3/aec_state.h"
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include "modules/audio_processing/aec3/reverb_model.h"
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#include "modules/audio_processing/aec3/spectrum_buffer.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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class ResidualEchoEstimator {
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public:
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ResidualEchoEstimator(const EchoCanceller3Config& config,
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size_t num_render_channels);
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~ResidualEchoEstimator();
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ResidualEchoEstimator(const ResidualEchoEstimator&) = delete;
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ResidualEchoEstimator& operator=(const ResidualEchoEstimator&) = delete;
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void Estimate(
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const AecState& aec_state,
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const RenderBuffer& render_buffer,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> S2_linear,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> Y2,
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rtc::ArrayView<std::array<float, kFftLengthBy2Plus1>> R2);
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private:
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enum class ReverbType { kLinear, kNonLinear };
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// Resets the state.
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void Reset();
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// Updates estimate for the power of the stationary noise component in the
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// render signal.
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void UpdateRenderNoisePower(const RenderBuffer& render_buffer);
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// Adds the estimated unmodelled echo power to the residual echo power
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// estimate.
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void AddReverb(ReverbType reverb_type,
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const AecState& aec_state,
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const RenderBuffer& render_buffer,
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rtc::ArrayView<std::array<float, kFftLengthBy2Plus1>> R2);
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// Gets the echo path gain to apply.
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float GetEchoPathGain(const AecState& aec_state,
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bool gain_for_early_reflections) const;
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const EchoCanceller3Config config_;
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const size_t num_render_channels_;
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const float early_reflections_transparent_mode_gain_;
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const float late_reflections_transparent_mode_gain_;
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const float early_reflections_general_gain_;
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const float late_reflections_general_gain_;
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const bool model_reverb_in_nonlinear_mode_;
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std::array<float, kFftLengthBy2Plus1> X2_noise_floor_;
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std::array<int, kFftLengthBy2Plus1> X2_noise_floor_counter_;
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ReverbModel echo_reverb_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_RESIDUAL_ECHO_ESTIMATOR_H_
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