c - Using Accelerate framework to perform FFTs -


there few lines of code in this onset detection program make use of fftw3 library difficult incorporate ios. replace using accelerate framework.

in onsetdshelpers.h there member variable:

fftwf_plan fftplan;

and in onsetdshelpers.c there couple of malloc methods:

odsbuf->windoweddata = (float*) fftwf_malloc(framesizebytes);   odsbuf->fftbuf       = (float*) fftwf_malloc(framesizebytes);

a method instantiate fftplan

odsbuf->fftplan = fftwf_plan_r2r_1d(ods->fftsize, odsbuf->windoweddata, odsbuf->fftbuf, fftw_r2hc, fftw_estimate);

methods releasing memory:

void onsetsds_destroy_audiodata(onsetsdsaudiobuf *odsbuf){     // take down fftw stuff     fftwf_destroy_plan(odsbuf->fftplan);     // free mem     free(odsbuf->data);     free(odsbuf->window);     fftwf_free(odsbuf->windoweddata);     fftwf_free(odsbuf->fftbuf); }

and method execute fft:

fftwf_execute(odsbuf->fftplan);

my knowledge of c , ffts pretty limited. pointers me going in right direction appreciated.


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