| /* |
| * 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_MAIN_FILTER_UPDATE_GAIN_H_ |
| #define MODULES_AUDIO_PROCESSING_AEC3_MAIN_FILTER_UPDATE_GAIN_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "modules/audio_processing/aec3/adaptive_fir_filter.h" |
| #include "modules/audio_processing/aec3/aec3_common.h" |
| #include "modules/audio_processing/aec3/echo_path_variability.h" |
| #include "modules/audio_processing/aec3/render_signal_analyzer.h" |
| #include "modules/audio_processing/aec3/subtractor_output.h" |
| #include "rtc_base/constructormagic.h" |
| |
| namespace webrtc { |
| |
| class ApmDataDumper; |
| |
| // Provides functionality for computing the adaptive gain for the main filter. |
| class MainFilterUpdateGain { |
| public: |
| MainFilterUpdateGain(); |
| ~MainFilterUpdateGain(); |
| |
| // Takes action in the case of a known echo path change. |
| void HandleEchoPathChange(const EchoPathVariability& echo_path_variability); |
| |
| // Computes the gain. |
| void Compute(const RenderBuffer& render_buffer, |
| const RenderSignalAnalyzer& render_signal_analyzer, |
| const SubtractorOutput& subtractor_output, |
| const AdaptiveFirFilter& filter, |
| bool saturated_capture_signal, |
| FftData* gain_fft); |
| |
| private: |
| static int instance_count_; |
| std::unique_ptr<ApmDataDumper> data_dumper_; |
| std::array<float, kFftLengthBy2Plus1> H_error_; |
| size_t poor_excitation_counter_; |
| size_t call_counter_ = 0; |
| RTC_DISALLOW_COPY_AND_ASSIGN(MainFilterUpdateGain); |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // MODULES_AUDIO_PROCESSING_AEC3_MAIN_FILTER_UPDATE_GAIN_H_ |