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This CL adds support for multichannel in the residual echo estimator code. It also adds placeholder functionality in the surrounding code to ensure that the residual echo estimator receives the require inputs. The changes in the CL has been shown to be bitexact on a large set of mono recordings. Bug: webrtc:10913 Change-Id: I726128ca928648b1dcf36c5f479eb243f3ff3f96 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/155361 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29400}
70 lines
2.4 KiB
C++
70 lines
2.4 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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const EchoCanceller3Config config_;
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const size_t num_render_channels_;
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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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