[idea] using kissfft for general OF fft, all players. #8492
Description
so it can serve as a placeholder until proper per platforms options are developed (if)
It is not hard to build Kiss for all platforms. I'm already building it in ofLibs
https://github.com/ofWorks/ofLibs/releases
soundPlayers can have an ofSoundFFT object inside
sketch: ofSoundFFT.h
#pragma once
#include <kissfft/kiss_fft.h>
#include <kissfft/kiss_fftr.h>
#include <vector>
class ofSoundFFT {
public:
ofSoundFFT();
~ofSoundFFT();
void setup(int bands);
void process(const float* input, int size);
const std::vector<float>& getSpectrum() const { return spectrum; }
static std::vector<float> createWindow(int size, int type = 0);
static void applyWindow(std::vector<float> &signal, const std::vector<float> &window);
private:
kiss_fftr_cfg fftCfg = nullptr;
int fftSize = 0;
std::vector<float> windowedSignal;
std::vector<kiss_fft_cpx> cx_out;
std::vector<float> spectrum;
std::vector<float> window;
float windowSum = 0.0f;
float computeWindowSum(const std::vector<float>& window);
};