c6abf6cd3f
Some API deprecation -- ExperimentalAgc and ExperimentalNs are gone. We're continuing to carry iSAC even though it's gone upstream, but maybe we'll want to drop that soon.
116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_SUPPRESSOR_IMPL_H_
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#define MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_SUPPRESSOR_IMPL_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include "modules/audio_processing/transient/transient_suppressor.h"
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#include "modules/audio_processing/transient/voice_probability_delay_unit.h"
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#include "rtc_base/gtest_prod_util.h"
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namespace webrtc {
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class TransientDetector;
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// Detects transients in an audio stream and suppress them using a simple
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// restoration algorithm that attenuates unexpected spikes in the spectrum.
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class TransientSuppressorImpl : public TransientSuppressor {
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public:
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TransientSuppressorImpl(VadMode vad_mode,
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int sample_rate_hz,
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int detector_rate_hz,
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int num_channels);
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~TransientSuppressorImpl() override;
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void Initialize(int sample_rate_hz,
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int detector_rate_hz,
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int num_channels) override;
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float Suppress(float* data,
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size_t data_length,
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int num_channels,
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const float* detection_data,
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size_t detection_length,
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const float* reference_data,
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size_t reference_length,
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float voice_probability,
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bool key_pressed) override;
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private:
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FRIEND_TEST_ALL_PREFIXES(TransientSuppressorVadModeParametrization,
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TypingDetectionLogicWorksAsExpectedForMono);
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void Suppress(float* in_ptr, float* spectral_mean, float* out_ptr);
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void UpdateKeypress(bool key_pressed);
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void UpdateRestoration(float voice_probability);
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void UpdateBuffers(float* data);
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void HardRestoration(float* spectral_mean);
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void SoftRestoration(float* spectral_mean);
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const VadMode vad_mode_;
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VoiceProbabilityDelayUnit voice_probability_delay_unit_;
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std::unique_ptr<TransientDetector> detector_;
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bool analyzed_audio_is_silent_;
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size_t data_length_;
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size_t detection_length_;
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size_t analysis_length_;
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size_t buffer_delay_;
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size_t complex_analysis_length_;
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int num_channels_;
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// Input buffer where the original samples are stored.
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std::unique_ptr<float[]> in_buffer_;
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std::unique_ptr<float[]> detection_buffer_;
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// Output buffer where the restored samples are stored.
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std::unique_ptr<float[]> out_buffer_;
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// Arrays for fft.
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std::unique_ptr<size_t[]> ip_;
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std::unique_ptr<float[]> wfft_;
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std::unique_ptr<float[]> spectral_mean_;
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// Stores the data for the fft.
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std::unique_ptr<float[]> fft_buffer_;
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std::unique_ptr<float[]> magnitudes_;
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const float* window_;
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std::unique_ptr<float[]> mean_factor_;
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float detector_smoothed_;
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int keypress_counter_;
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int chunks_since_keypress_;
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bool detection_enabled_;
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bool suppression_enabled_;
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bool use_hard_restoration_;
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int chunks_since_voice_change_;
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uint32_t seed_;
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bool using_reference_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_SUPPRESSOR_IMPL_H_
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