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This CL adds support for multiple channels in the reverb modelling. As a side effect, it also partly adds multi-channel supports for the sections of the code. Beyond adding the multi-channel support, a bug is fixed as part of this CL. Since the bug fix affects the bitexactness, as a safety precaution the CL includes the ability to override the bugfix. Apart from the contributions from the bugfix, the changes have been verified to be bitexact for a large set of mono recordings. Bug: webrtc:10913 Change-Id: I1f307b532be85ef4182f8db41384f44d40a25219 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156382 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29456}
54 lines
2.2 KiB
C++
54 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018 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/reverb_model_estimator.h"
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namespace webrtc {
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ReverbModelEstimator::ReverbModelEstimator(const EchoCanceller3Config& config,
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size_t num_capture_channels)
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: reverb_decay_estimators_(num_capture_channels),
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reverb_frequency_responses_(num_capture_channels) {
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for (size_t ch = 0; ch < reverb_decay_estimators_.size(); ++ch) {
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reverb_decay_estimators_[ch] =
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std::make_unique<ReverbDecayEstimator>(config);
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}
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}
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ReverbModelEstimator::~ReverbModelEstimator() = default;
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void ReverbModelEstimator::Update(
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rtc::ArrayView<const std::vector<float>> impulse_responses,
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rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
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frequency_responses,
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rtc::ArrayView<const absl::optional<float>> linear_filter_qualities,
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rtc::ArrayView<const int> filter_delays_blocks,
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const std::vector<bool>& usable_linear_estimates,
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bool stationary_block) {
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const size_t num_capture_channels = reverb_decay_estimators_.size();
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RTC_DCHECK_EQ(num_capture_channels, impulse_responses.size());
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RTC_DCHECK_EQ(num_capture_channels, frequency_responses.size());
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RTC_DCHECK_EQ(num_capture_channels, usable_linear_estimates.size());
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for (size_t ch = 0; ch < num_capture_channels; ++ch) {
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// Estimate the frequency response for the reverb.
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reverb_frequency_responses_[ch].Update(
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frequency_responses[ch], filter_delays_blocks[ch],
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linear_filter_qualities[ch], stationary_block);
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// Estimate the reverb decay,
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reverb_decay_estimators_[ch]->Update(
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impulse_responses[ch], linear_filter_qualities[ch],
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filter_delays_blocks[ch], usable_linear_estimates[ch],
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stationary_block);
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}
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}
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} // namespace webrtc
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