From 84231a000a4f06e34efa0d3700377dd3cc447e0b Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Thu, 4 Oct 2012 22:24:37 +0000 Subject: took FFTease2.5_Pd_OSX.zip and unpacked it into a Library Template layout original source: http://www.somasa.qub.ac.uk/~elyon/LyonSoftware/MaxMSP/FFTease/FFTease2.5_Pd_OSX.zip svn path=/trunk/externals/fftease/; revision=16331 --- PenroseOscil.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 PenroseOscil.c (limited to 'PenroseOscil.c') diff --git a/PenroseOscil.c b/PenroseOscil.c new file mode 100644 index 0000000..78cd7b6 --- /dev/null +++ b/PenroseOscil.c @@ -0,0 +1,40 @@ +#include +#include "PenroseOscil.h" + + +float frequencyToIncrement( float samplingRate, float frequency, int bufferLength ) { + + return (frequency / samplingRate) * (float) bufferLength; +} + +void makeSineBuffer( float *buffer, int bufferLength ) { + + int i; + + float myTwoPi = 8. * atan(1.); + + for ( i=0; i <= bufferLength; i++ ) + *(buffer+i) = sin( myTwoPi * ((float) i / (float) bufferLength) ); + + return; +} + + +float bufferOscil( float *phase, float increment, float *buffer, + int bufferLength ) +{ + + float sample; + + while ( *phase > bufferLength ) + *phase -= bufferLength; + + while ( *phase < 0. ) + *phase += bufferLength; + + sample = *( buffer + (int) (*phase) ); + + *phase += increment; + + return sample; +} -- cgit v1.2.1