| /* |
| * 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 WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SHADOW_FILTER_UPDATE_GAIN_H_ |
| #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SHADOW_FILTER_UPDATE_GAIN_H_ |
| |
| #include "webrtc/modules/audio_processing/aec3/aec3_common.h" |
| #include "webrtc/modules/audio_processing/aec3/render_buffer.h" |
| #include "webrtc/modules/audio_processing/aec3/render_signal_analyzer.h" |
| #include "webrtc/rtc_base/constructormagic.h" |
| |
| namespace webrtc { |
| |
| // Provides functionality for computing the fixed gain for the shadow filter. |
| class ShadowFilterUpdateGain { |
| public: |
| // Takes action in the case of a known echo path change. |
| void HandleEchoPathChange(); |
| |
| // Computes the gain. |
| void Compute(const RenderBuffer& render_buffer, |
| const RenderSignalAnalyzer& render_signal_analyzer, |
| const FftData& E_shadow, |
| size_t size_partitions, |
| bool saturated_capture_signal, |
| FftData* G); |
| |
| private: |
| // TODO(peah): Check whether this counter should instead be initialized to a |
| // large value. |
| size_t poor_signal_excitation_counter_ = 0; |
| size_t call_counter_ = 0; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SHADOW_FILTER_UPDATE_GAIN_H_ |