Hi Connor, I noticed that you are still struggling with implementing the fftw lib. I did not read all your posts in this thread in detail, but maybe my implementation of fftw, can be of help to you. I have recently implemented the fftw in a VST-plugin (using JUCE API).
Here is where I implement the fftw in a pitch estimator plugin: https://github.com/junilyd/Pitch-Estimator-Plugin/blob/master/Source/PluginProcessor.cpp In line 191 you can find the signal processing method and in line 155 I allocate a data buffer for the fft result. Here is the fftw class I use: https://github.com/junilyd/Pitch-Estimator-Plugin/blob/master/Builds/MacOSX/FastFourierTransformer.cpp I used this implementation by GuillaumeLeNost, to get started: https://github.com/GuillaumeLeNost/SimpleFFT/tree/master/Source I mainly separated the length of the fft from the buffer size, the rest of the fftw-class is still the same as the original. I hope it will be of help. /Jacob On 20/06/15 18:15, Connor Gettel wrote: >> Hey guys, >> >> So i’ve used a typedef struct for the FFT stuff, accessing the fftbuffer >> with -> notation in the callback (learning lots!). >> Can anyone confirm that this makes sense? It’s compiling fine, still >> crashing though. >> >> typedef struct _FFTW3{ >> double *fftbuffer; >> int buffersize; >> }FFTW3; >> >> static int audio_callback( const void *inputBuffer, >> void *outputBuffer, >> unsigned long framesPerBuffer, >> const PaStreamCallbackTimeInfo* timeInfo, >> PaStreamCallbackFlags statusFlags, >> void *userData ) >> { >> >> { >> int i; >> float *inp = (float *) inputBuffer, *outp = (float *) >> outputBuffer; >> for (i=0;i<framesPerBuffer;i++) *outp++ = *inp++; >> >> } >> >> FFTW3 *p = (FFTW3*)userData; >> double *fftbuffer = p->fftbuffer; >> fftbuffer=*in; >> int i; >> float *fftbuff = (float*) fftbuffer, *inp=(float*) inputBuffer; >> for(i=0;i<framesPerBuffer;i++)*fftbuff++ = *inp++; >> >> fftw_execute(my_plan); >> >> >> return paContinue; >> } > -- > dupswapdrop -- the music-dsp mailing list and website: > subscription info, FAQ, source code archive, list archive, book reviews, dsp > links > http://music.columbia.edu/cmc/music-dsp > http://music.columbia.edu/mailman/listinfo/music-dsp > -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
