From b418fb91e7bb45d7b5f1eb8b19703441ae94eb13 Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Thu, 9 Feb 2006 16:18:39 +0000 Subject: got everything building and working, including building single-object/single-file objects with a shared dylib. Now got to get it integrated into the build system svn path=/trunk/externals/fftease/; revision=4574 --- lib/PenroseOscil.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 lib/PenroseOscil.c (limited to 'lib/PenroseOscil.c') diff --git a/lib/PenroseOscil.c b/lib/PenroseOscil.c new file mode 100644 index 0000000..78cd7b6 --- /dev/null +++ b/lib/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