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Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/aec3/dominant_nearend_detector.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/aec3/dominant_nearend_detector.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/dominant_nearend_detector.h b/third_party/libwebrtc/modules/audio_processing/aec3/dominant_nearend_detector.h new file mode 100644 index 0000000000..046d1488d6 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/aec3/dominant_nearend_detector.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2019 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_DOMINANT_NEAREND_DETECTOR_H_ +#define MODULES_AUDIO_PROCESSING_AEC3_DOMINANT_NEAREND_DETECTOR_H_ + +#include <vector> + +#include "api/array_view.h" +#include "api/audio/echo_canceller3_config.h" +#include "modules/audio_processing/aec3/nearend_detector.h" + +namespace webrtc { +// Class for selecting whether the suppressor is in the nearend or echo state. +class DominantNearendDetector : public NearendDetector { + public: + DominantNearendDetector( + const EchoCanceller3Config::Suppressor::DominantNearendDetection& config, + size_t num_capture_channels); + + // Returns whether the current state is the nearend state. + bool IsNearendState() const override { return nearend_state_; } + + // Updates the state selection based on latest spectral estimates. + void Update(rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> + nearend_spectrum, + rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> + residual_echo_spectrum, + rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> + comfort_noise_spectrum, + bool initial_state) override; + + private: + const float enr_threshold_; + const float enr_exit_threshold_; + const float snr_threshold_; + const int hold_duration_; + const int trigger_threshold_; + const bool use_during_initial_phase_; + const size_t num_capture_channels_; + + bool nearend_state_ = false; + std::vector<int> trigger_counters_; + std::vector<int> hold_counters_; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_PROCESSING_AEC3_DOMINANT_NEAREND_DETECTOR_H_ |