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https://github.com/danog/libtgvoip.git
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5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
/*
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* Copyright (c) 2018 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_AEC3_REVERB_MODEL_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_H_
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#include <array>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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// The ReverbModel class describes an exponential reverberant model
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// that can be applied over power spectrums.
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class ReverbModel {
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public:
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ReverbModel();
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~ReverbModel();
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// Resets the state.
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void Reset();
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// The methods AddReverbNoFreqShaping and AddReverb add the reverberation
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// contribution to an input/output power spectrum
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// Before applying the exponential reverberant model, the input power spectrum
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// is pre-scaled. Use the method AddReverb when a different scaling should be
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// applied per frequency and AddReverb_no_freq_shape if the same scaling
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// should be used for all the frequencies.
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void AddReverbNoFreqShaping(rtc::ArrayView<const float> power_spectrum,
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float power_spectrum_scaling,
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float reverb_decay,
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rtc::ArrayView<float> reverb_power_spectrum);
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void AddReverb(rtc::ArrayView<const float> power_spectrum,
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rtc::ArrayView<const float> freq_response_tail,
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float reverb_decay,
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rtc::ArrayView<float> reverb_power_spectrum);
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// Updates the reverberation contributions without applying any shaping of the
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// spectrum.
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void UpdateReverbContributionsNoFreqShaping(
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rtc::ArrayView<const float> power_spectrum,
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float power_spectrum_scaling,
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float reverb_decay);
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// Returns the current power spectrum reverberation contributions.
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rtc::ArrayView<const float> GetPowerSpectrum() const { return reverb_; }
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private:
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// Updates the reverberation contributions.
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void UpdateReverbContributions(rtc::ArrayView<const float>& power_spectrum,
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rtc::ArrayView<const float>& freq_resp_tail,
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float reverb_decay);
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std::array<float, kFftLengthBy2Plus1> reverb_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_REVERB_MODEL_H_
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