0cbb58e046
This is a reland of 87a7b82520b83a6cf42da27cdc46142c2eb6248c Original change's description: > Refactoring of the noise suppressor and adding true multichannel support > > This CL adds proper multichannel support to the noise suppressor. > To accomplish that in a safe way, a full refactoring of the noise > suppressor code has been done. > > Due to floating point precision, the changes made are not entirely > bitexact. They are, however, very close to being bitexact. > > As a safety measure, the former noise suppressor code is preserved > and a kill-switch is added to allow revering to the legacy noise > suppressor in case issues arise. > > Bug: webrtc:10895, b/143344262 > Change-Id: I0b071011b23265ac12e6d4b3956499d122286657 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158407 > Commit-Queue: Per Åhgren <peah@webrtc.org> > Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#29646} Bug: webrtc:10895, b/143344262 Change-Id: I236f1e67bb0baa4e30908a4cf7a8a7bb55fbced3 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158747 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29663}
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/*
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* Copyright (c) 2019 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_NS_NS_FFT_H_
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#define MODULES_AUDIO_PROCESSING_NS_NS_FFT_H_
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#include <vector>
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#include "api/array_view.h"
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#include "modules/audio_processing/ns/ns_common.h"
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namespace webrtc {
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// Wrapper class providing 256 point FFT functionality.
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class NrFft {
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public:
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NrFft();
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NrFft(const NrFft&) = delete;
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NrFft& operator=(const NrFft&) = delete;
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// Transforms the signal from time to frequency domain.
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void Fft(rtc::ArrayView<float, kFftSize> time_data,
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rtc::ArrayView<float, kFftSize> real,
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rtc::ArrayView<float, kFftSize> imag);
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// Transforms the signal from frequency to time domain.
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void Ifft(rtc::ArrayView<const float> real,
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rtc::ArrayView<const float> imag,
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rtc::ArrayView<float> time_data);
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private:
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std::vector<size_t> bit_reversal_state_;
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std::vector<float> tables_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_NS_NS_FFT_H_
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