| /* |
| * Copyright (c) 2018 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_REVERB_MODEL_ESTIMATOR_H_ |
| #define MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_ESTIMATOR_H_ |
| |
| #include <array> |
| #include <vector> |
| |
| #include "absl/types/optional.h" |
| #include "api/array_view.h" |
| #include "api/audio/echo_canceller3_config.h" |
| #include "modules/audio_processing/aec3/aec3_common.h" // kFftLengthBy2Plus1 |
| #include "modules/audio_processing/aec3/reverb_decay_estimator.h" |
| #include "modules/audio_processing/aec3/reverb_frequency_response.h" |
| |
| namespace webrtc { |
| |
| class ApmDataDumper; |
| |
| // Class for estimating the model parameters for the reverberant echo. |
| class ReverbModelEstimator { |
| public: |
| ReverbModelEstimator(const EchoCanceller3Config& config, |
| size_t num_capture_channels); |
| ~ReverbModelEstimator(); |
| |
| // Updates the estimates based on new data. |
| void Update( |
| rtc::ArrayView<const std::vector<float>> impulse_responses, |
| rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>> |
| frequency_responses, |
| rtc::ArrayView<const absl::optional<float>> linear_filter_qualities, |
| rtc::ArrayView<const int> filter_delays_blocks, |
| const std::vector<bool>& usable_linear_estimates, |
| bool stationary_block); |
| |
| // Returns the exponential decay of the reverberant echo. |
| // TODO(peah): Correct to properly support multiple channels. |
| float ReverbDecay() const { return reverb_decay_estimators_[0]->Decay(); } |
| |
| // Return the frequency response of the reverberant echo. |
| // TODO(peah): Correct to properly support multiple channels. |
| rtc::ArrayView<const float> GetReverbFrequencyResponse() const { |
| return reverb_frequency_responses_[0].FrequencyResponse(); |
| } |
| |
| // Dumps debug data. |
| void Dump(ApmDataDumper* data_dumper) const { |
| reverb_decay_estimators_[0]->Dump(data_dumper); |
| } |
| |
| private: |
| std::vector<std::unique_ptr<ReverbDecayEstimator>> reverb_decay_estimators_; |
| std::vector<ReverbFrequencyResponse> reverb_frequency_responses_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_ESTIMATOR_H_ |