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This CL utilizes the existing, but unused, ability to set different histogram thresholds for early and late delay estimation. It does so by tuning the parameters for these. On top of that, some corrections are added to correctly handle resets and the use of the hysteresis thresholds. Bug: webrtc:19886,chromium:896334 Change-Id: I950ac107c124541af8f02b4403f477dda71cc1a1 Reviewed-on: https://webrtc-review.googlesource.com/c/106706 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25443}
69 lines
2.4 KiB
C++
69 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_ECHO_PATH_DELAY_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_ECHO_PATH_DELAY_ESTIMATOR_H_
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#include <stddef.h>
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#include "absl/types/optional.h"
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/decimator.h"
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#include "modules/audio_processing/aec3/delay_estimate.h"
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#include "modules/audio_processing/aec3/matched_filter.h"
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#include "modules/audio_processing/aec3/matched_filter_lag_aggregator.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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class ApmDataDumper;
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struct DownsampledRenderBuffer;
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struct EchoCanceller3Config;
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// Estimates the delay of the echo path.
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class EchoPathDelayEstimator {
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public:
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EchoPathDelayEstimator(ApmDataDumper* data_dumper,
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const EchoCanceller3Config& config);
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~EchoPathDelayEstimator();
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// Resets the estimation. If the delay confidence is reset, the reset behavior
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// is as if the call is restarted.
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void Reset(bool reset_delay_confidence);
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// Produce a delay estimate if such is avaliable.
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absl::optional<DelayEstimate> EstimateDelay(
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const DownsampledRenderBuffer& render_buffer,
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rtc::ArrayView<const float> capture);
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// Log delay estimator properties.
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void LogDelayEstimationProperties(int sample_rate_hz, size_t shift) const {
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matched_filter_.LogFilterProperties(sample_rate_hz, shift,
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down_sampling_factor_);
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}
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private:
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ApmDataDumper* const data_dumper_;
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const size_t down_sampling_factor_;
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const size_t sub_block_size_;
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Decimator capture_decimator_;
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MatchedFilter matched_filter_;
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MatchedFilterLagAggregator matched_filter_lag_aggregator_;
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absl::optional<DelayEstimate> old_aggregated_lag_;
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size_t consistent_estimate_counter_ = 0;
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// Internal reset method with more granularity.
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void Reset(bool reset_lag_aggregator, bool reset_delay_confidence);
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RTC_DISALLOW_COPY_AND_ASSIGN(EchoPathDelayEstimator);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_ECHO_PATH_DELAY_ESTIMATOR_H_
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