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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h b/third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h new file mode 100644 index 0000000000..639a52c561 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/aec3/erl_estimator.h @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_ +#define MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_ + +#include <stddef.h> + +#include <array> +#include <vector> + +#include "api/array_view.h" +#include "modules/audio_processing/aec3/aec3_common.h" + +namespace webrtc { + +// Estimates the echo return loss based on the signal spectra. +class ErlEstimator { + public: + explicit ErlEstimator(size_t startup_phase_length_blocks_); + ~ErlEstimator(); + + ErlEstimator(const ErlEstimator&) = delete; + ErlEstimator& operator=(const ErlEstimator&) = delete; + + // Resets the ERL estimation. + void Reset(); + + // Updates the ERL estimate. + void Update(const std::vector<bool>& converged_filters, + rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> + render_spectra, + rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> + capture_spectra); + + // Returns the most recent ERL estimate. + const std::array<float, kFftLengthBy2Plus1>& Erl() const { return erl_; } + float ErlTimeDomain() const { return erl_time_domain_; } + + private: + const size_t startup_phase_length_blocks__; + std::array<float, kFftLengthBy2Plus1> erl_; + std::array<int, kFftLengthBy2Minus1> hold_counters_; + float erl_time_domain_; + int hold_counter_time_domain_; + size_t blocks_since_reset_ = 0; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_PROCESSING_AEC3_ERL_ESTIMATOR_H_ |