Robin Gareus
4050ca5633
Copyright-holder and year information is extracted from git log. git history begins in 2005. So (C) from 1998..2005 is lost. Also some (C) assignment of commits where the committer didn't use --author.
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
/*
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* Copyright (C) 2008 Sampo Savolainen <v2@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __ardour_fft_h__
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#define __ardour_fft_h__
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#include <iostream>
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#include <stdio.h>
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#include <sys/types.h>
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#include <complex> // this needs to be included before fftw3.h
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#include <fftw3.h>
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#include "ardour/types.h"
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namespace GTKArdour {
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class FFT
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{
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public:
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FFT (uint32_t);
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~FFT ();
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enum WindowingType {
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NONE,
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HANN
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};
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void reset ();
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void analyze (ARDOUR::Sample*, WindowingType w = NONE);
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void calculate ();
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uint32_t bins () const { return _data_size; }
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float power_at_bin (uint32_t i) const { return _power_at_bin[i]; }
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float phase_at_bin (uint32_t i) const { return _phase_at_bin[i]; }
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private:
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float* get_hann_window ();
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uint32_t const _window_size;
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uint32_t const _data_size;
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uint32_t _iterations;
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float* _hann_window;
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float* _fftInput;
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float* _fftOutput;
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float* _power_at_bin;
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float* _phase_at_bin;
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fftwf_plan _plan;
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};
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}
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#endif
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