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| 1 /* |
| 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ |
| 10 |
| 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RESIDUAL_ECHO_ESTIMATOR_H_ |
| 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RESIDUAL_ECHO_ESTIMATOR_H_ |
| 13 |
| 14 #include <algorithm> |
| 15 #include <array> |
| 16 #include <vector> |
| 17 |
| 18 #include "webrtc/base/array_view.h" |
| 19 #include "webrtc/base/constructormagic.h" |
| 20 #include "webrtc/modules/audio_processing/aec3/aec3_common.h" |
| 21 #include "webrtc/modules/audio_processing/aec3/aec_state.h" |
| 22 #include "webrtc/modules/audio_processing/aec3/fft_buffer.h" |
| 23 |
| 24 namespace webrtc { |
| 25 |
| 26 class ResidualEchoEstimator { |
| 27 public: |
| 28 ResidualEchoEstimator(); |
| 29 ~ResidualEchoEstimator(); |
| 30 |
| 31 void Estimate(bool using_subtractor_output, |
| 32 const AecState& aec_state, |
| 33 const FftBuffer& X_buffer, |
| 34 const std::vector<std::array<float, kFftLengthBy2Plus1>>& H2, |
| 35 const std::array<float, kFftLengthBy2Plus1>& E2_main, |
| 36 const std::array<float, kFftLengthBy2Plus1>& E2_shadow, |
| 37 const std::array<float, kFftLengthBy2Plus1>& S2_linear, |
| 38 const std::array<float, kFftLengthBy2Plus1>& S2_fallback, |
| 39 const std::array<float, kFftLengthBy2Plus1>& Y2, |
| 40 std::array<float, kFftLengthBy2Plus1>* R2); |
| 41 |
| 42 private: |
| 43 std::array<float, kFftLengthBy2Plus1> echo_path_gain_; |
| 44 size_t active_render_counter_ = 0; |
| 45 size_t blocks_since_last_saturation_ = 1000; |
| 46 |
| 47 RTC_DISALLOW_COPY_AND_ASSIGN(ResidualEchoEstimator); |
| 48 }; |
| 49 |
| 50 } // namespace webrtc |
| 51 |
| 52 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RESIDUAL_ECHO_ESTIMATOR_H_ |
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