48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
// Copyright (C) 2015 2022 Then Try This
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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
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include <fftw3.h>
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#include <spiralcore/types.h>
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#ifndef SPIRALCORE_FFT
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#define SPIRALCORE_FFT
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//#define __FFTWFLOAT__
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namespace spiralcore {
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class FFT
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{
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public:
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FFT(u32 length, u32 rate, u32 num_bins);
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~FFT();
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void impulse2freq(const float *imp);
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void calculate_bins();
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float calculate_dominant_freq();
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fftw_plan m_plan;
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u32 m_length;
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u32 m_rate;
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u32 m_num_bins;
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double *m_in;
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fftw_complex *m_spectrum;
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float *m_bin;
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};
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}
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#endif
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