0520b0eb7b
During pitch search in the RNN VAD, we calculate auto correlation. Before this CL, we computed kNumInvertedLags12kHz=147 dot products of vectors with kBufSize12kHz-kMaxPitch12kHz=240 elements. This was the most time consuming step of the new VAD. This CL makes the computation happen in frequency domain. Profiling shows a 3x speed increase. In future, we can try using a more efficient FFT and to reduce the FFT length to some of e.g. 400, 405, 432. # For minimal Clang plugin check change. TBR: kwiberg@webrtc.org Bug: webrtc:9076 Change-Id: I688251a415869d53175a37f390f441d4e035d954 Reviewed-on: https://webrtc-review.googlesource.com/73366 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Alessio Bazzica <alessiob@webrtc.org> Commit-Queue: Alex Loiko <aleloi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23171}
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
/*
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* Copyright (c) 2015 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 COMMON_AUDIO_REAL_FOURIER_OOURA_H_
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#define COMMON_AUDIO_REAL_FOURIER_OOURA_H_
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#include <complex>
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#include <memory>
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#include "common_audio/real_fourier.h"
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namespace webrtc {
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class RealFourierOoura : public RealFourier {
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public:
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explicit RealFourierOoura(int fft_order);
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~RealFourierOoura() override;
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void Forward(const float* src, std::complex<float>* dest) const override;
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void Inverse(const std::complex<float>* src, float* dest) const override;
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int order() const override;
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private:
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const int order_;
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const size_t length_;
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const size_t complex_length_;
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// These are work arrays for Ooura. The names are based on the comments in
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// fft4g.c.
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const std::unique_ptr<size_t[]> work_ip_;
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const std::unique_ptr<float[]> work_w_;
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};
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} // namespace webrtc
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#endif // COMMON_AUDIO_REAL_FOURIER_OOURA_H_
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