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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
116 lines
4 KiB
C++
116 lines
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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#include "modules/audio_processing/aec3/subtractor.h"
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#include <algorithm>
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#include "api/array_view.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/safe_minmax.h"
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namespace webrtc {
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namespace {
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void PredictionError(const Aec3Fft& fft,
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const FftData& S,
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rtc::ArrayView<const float> y,
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std::array<float, kBlockSize>* e,
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FftData* E,
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std::array<float, kBlockSize>* s) {
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std::array<float, kFftLength> s_scratch;
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fft.Ifft(S, &s_scratch);
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constexpr float kScale = 1.0f / kFftLengthBy2;
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std::transform(y.begin(), y.end(), s_scratch.begin() + kFftLengthBy2,
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e->begin(), [&](float a, float b) { return a - b * kScale; });
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std::for_each(e->begin(), e->end(),
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[](float& a) { a = rtc::SafeClamp(a, -32768.f, 32767.f); });
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fft.ZeroPaddedFft(*e, E);
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if (s) {
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for (size_t k = 0; k < s->size(); ++k) {
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(*s)[k] = kScale * s_scratch[k + kFftLengthBy2];
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}
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}
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}
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} // namespace
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Subtractor::Subtractor(ApmDataDumper* data_dumper,
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Aec3Optimization optimization)
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: fft_(),
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data_dumper_(data_dumper),
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optimization_(optimization),
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main_filter_(kAdaptiveFilterLength, optimization, data_dumper_),
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shadow_filter_(kAdaptiveFilterLength, optimization, data_dumper_) {
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RTC_DCHECK(data_dumper_);
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}
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Subtractor::~Subtractor() = default;
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void Subtractor::HandleEchoPathChange(
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const EchoPathVariability& echo_path_variability) {
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if (echo_path_variability.delay_change) {
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main_filter_.HandleEchoPathChange();
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shadow_filter_.HandleEchoPathChange();
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G_main_.HandleEchoPathChange();
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G_shadow_.HandleEchoPathChange();
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}
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}
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void Subtractor::Process(const RenderBuffer& render_buffer,
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const rtc::ArrayView<const float> capture,
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const RenderSignalAnalyzer& render_signal_analyzer,
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const AecState& aec_state,
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SubtractorOutput* output) {
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RTC_DCHECK_EQ(kBlockSize, capture.size());
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rtc::ArrayView<const float> y = capture;
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FftData& E_main = output->E_main;
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FftData E_shadow;
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std::array<float, kBlockSize>& e_main = output->e_main;
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std::array<float, kBlockSize>& e_shadow = output->e_shadow;
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FftData S;
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FftData& G = S;
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// Form the output of the main filter.
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main_filter_.Filter(render_buffer, &S);
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PredictionError(fft_, S, y, &e_main, &E_main, &output->s_main);
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// Form the output of the shadow filter.
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shadow_filter_.Filter(render_buffer, &S);
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PredictionError(fft_, S, y, &e_shadow, &E_shadow, nullptr);
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// Compute spectra for future use.
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E_main.Spectrum(optimization_, &output->E2_main);
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E_shadow.Spectrum(optimization_, &output->E2_shadow);
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// Update the main filter.
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G_main_.Compute(render_buffer, render_signal_analyzer, *output, main_filter_,
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aec_state.SaturatedCapture(), &G);
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main_filter_.Adapt(render_buffer, G);
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data_dumper_->DumpRaw("aec3_subtractor_G_main", G.re);
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data_dumper_->DumpRaw("aec3_subtractor_G_main", G.im);
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// Update the shadow filter.
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G_shadow_.Compute(render_buffer, render_signal_analyzer, E_shadow,
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shadow_filter_.SizePartitions(),
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aec_state.SaturatedCapture(), &G);
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shadow_filter_.Adapt(render_buffer, G);
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data_dumper_->DumpRaw("aec3_subtractor_G_shadow", G.re);
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data_dumper_->DumpRaw("aec3_subtractor_G_shadow", G.im);
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main_filter_.DumpFilter("aec3_subtractor_H_main");
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shadow_filter_.DumpFilter("aec3_subtractor_H_shadow");
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}
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} // namespace webrtc
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