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Diffstat (limited to 'gtk2_ardour/fft.h')
-rw-r--r-- | gtk2_ardour/fft.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/gtk2_ardour/fft.h b/gtk2_ardour/fft.h new file mode 100644 index 0000000000..a68ed59edc --- /dev/null +++ b/gtk2_ardour/fft.h @@ -0,0 +1,65 @@ +/* + Copyright (C) 2008 Paul Davis + Author: Sampo Savolainen + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#ifndef __ardour_fft_h__ +#define __ardour_fft_h__ + + +#include <iostream> + +#include <stdio.h> +#include <sys/types.h> +#include <complex> // this needs to be included before fftw3.h +#include <fftw3.h> + + +#include <ardour/types.h> + +class FFT +{ + public: + FFT(uint32_t); + ~FFT(); + + void reset(); + void analyze(ARDOUR::Sample *); + void calculate(); + + uint32_t bins() const { return _dataSize; } + + float powerAtBin(uint32_t i) const { return _powerAtBin[i]; } + float phaseAtBin(uint32_t i) const { return _phaseAtBin[i]; } + + private: + + uint32_t const _windowSize; + uint32_t const _dataSize; + uint32_t _iterations; + + float *_fftInput; + float *_fftOutput; + + float *_powerAtBin; + float *_phaseAtBin; + + fftwf_plan _plan; +}; + +#endif |