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6a05bb1b12
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}
125 lines
4.9 KiB
C++
125 lines
4.9 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/echo_path_delay_estimator.h"
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#include <array>
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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/downsampled_render_buffer.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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namespace webrtc {
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EchoPathDelayEstimator::EchoPathDelayEstimator(
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ApmDataDumper* data_dumper,
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const EchoCanceller3Config& config,
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size_t num_capture_channels)
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: data_dumper_(data_dumper),
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down_sampling_factor_(config.delay.down_sampling_factor),
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sub_block_size_(down_sampling_factor_ != 0
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? kBlockSize / down_sampling_factor_
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: kBlockSize),
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capture_mixer_(num_capture_channels,
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config.delay.capture_alignment_mixing),
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capture_decimator_(down_sampling_factor_),
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matched_filter_(
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data_dumper_,
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DetectOptimization(),
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sub_block_size_,
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kMatchedFilterWindowSizeSubBlocks,
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config.delay.num_filters,
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kMatchedFilterAlignmentShiftSizeSubBlocks,
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config.delay.down_sampling_factor == 8
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? config.render_levels.poor_excitation_render_limit_ds8
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: config.render_levels.poor_excitation_render_limit,
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config.delay.delay_estimate_smoothing,
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config.delay.delay_candidate_detection_threshold),
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matched_filter_lag_aggregator_(data_dumper_,
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matched_filter_.GetMaxFilterLag(),
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config.delay.delay_selection_thresholds) {
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RTC_DCHECK(data_dumper);
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RTC_DCHECK(down_sampling_factor_ > 0);
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}
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EchoPathDelayEstimator::~EchoPathDelayEstimator() = default;
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void EchoPathDelayEstimator::Reset(bool reset_delay_confidence) {
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Reset(true, reset_delay_confidence);
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}
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absl::optional<DelayEstimate> EchoPathDelayEstimator::EstimateDelay(
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const DownsampledRenderBuffer& render_buffer,
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const std::vector<std::vector<float>>& capture) {
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RTC_DCHECK_EQ(kBlockSize, capture[0].size());
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std::array<float, kBlockSize> downsampled_capture_data;
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rtc::ArrayView<float> downsampled_capture(downsampled_capture_data.data(),
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sub_block_size_);
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std::array<float, kBlockSize> downmixed_capture;
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capture_mixer_.ProduceOutput(capture, downmixed_capture);
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capture_decimator_.Decimate(downmixed_capture, downsampled_capture);
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data_dumper_->DumpWav("aec3_capture_decimator_output",
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downsampled_capture.size(), downsampled_capture.data(),
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16000 / down_sampling_factor_, 1);
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matched_filter_.Update(render_buffer, downsampled_capture);
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absl::optional<DelayEstimate> aggregated_matched_filter_lag =
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matched_filter_lag_aggregator_.Aggregate(
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matched_filter_.GetLagEstimates());
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// Run clockdrift detection.
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if (aggregated_matched_filter_lag &&
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(*aggregated_matched_filter_lag).quality ==
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DelayEstimate::Quality::kRefined)
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clockdrift_detector_.Update((*aggregated_matched_filter_lag).delay);
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// TODO(peah): Move this logging outside of this class once EchoCanceller3
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// development is done.
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data_dumper_->DumpRaw(
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"aec3_echo_path_delay_estimator_delay",
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aggregated_matched_filter_lag
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? static_cast<int>(aggregated_matched_filter_lag->delay *
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down_sampling_factor_)
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: -1);
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// Return the detected delay in samples as the aggregated matched filter lag
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// compensated by the down sampling factor for the signal being correlated.
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if (aggregated_matched_filter_lag) {
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aggregated_matched_filter_lag->delay *= down_sampling_factor_;
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}
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if (old_aggregated_lag_ && aggregated_matched_filter_lag &&
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old_aggregated_lag_->delay == aggregated_matched_filter_lag->delay) {
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++consistent_estimate_counter_;
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} else {
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consistent_estimate_counter_ = 0;
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}
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old_aggregated_lag_ = aggregated_matched_filter_lag;
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constexpr size_t kNumBlocksPerSecondBy2 = kNumBlocksPerSecond / 2;
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if (consistent_estimate_counter_ > kNumBlocksPerSecondBy2) {
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Reset(false, false);
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}
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return aggregated_matched_filter_lag;
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}
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void EchoPathDelayEstimator::Reset(bool reset_lag_aggregator,
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bool reset_delay_confidence) {
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if (reset_lag_aggregator) {
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matched_filter_lag_aggregator_.Reset(reset_delay_confidence);
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}
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matched_filter_.Reset();
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old_aggregated_lag_ = absl::nullopt;
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consistent_estimate_counter_ = 0;
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}
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} // namespace webrtc
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