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/**
bespoke synth, a software modular synthesizer
Copyright (C) 2021 Ryan Challinor (contact: awwbees@gmail.com)
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 3 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, see <http://www.gnu.org/licenses/>.
**/
//
// FFT.h
// modularSynth
//
// Created by Ryan Challinor on 1/27/13.
//
//
#pragma once
#include "SynthGlobals.h"
// Variables for FFT routine
class FFT
{
public:
FFT(int nfft);
~FFT();
void Forward(float* input, float* output_re, float* output_im);
void Inverse(float* input_re, float* input_im, float* output);
private:
int mNfft{ 0 }; // size of FFT
int mNumfreqs{ 0 }; // number of frequencies represented (nfft/2 + 1)
float* mFft_data{ nullptr }; // array for writing/reading to/from FFT function
};
struct FFTData
{
FFTData(int windowSize, int freqDomainSize)
: mWindowSize(windowSize)
, mFreqDomainSize(freqDomainSize)
{
mRealValues = new float[freqDomainSize];
mImaginaryValues = new float[freqDomainSize];
mTimeDomain = new float[windowSize];
Clear();
}
~FFTData()
{
delete[] mRealValues;
delete[] mImaginaryValues;
delete[] mTimeDomain;
}
void Clear();
int mWindowSize{ 0 };
int mFreqDomainSize{ 0 };
float* mRealValues{ nullptr };
float* mImaginaryValues{ nullptr };
float* mTimeDomain{ nullptr };
};
#ifndef MAYER_H
#define MAYER_H
#define REAL float
void mayer_realfft(int n, REAL* real);
void mayer_realifft(int n, REAL* real);
#endif
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