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 --- leanunconvert.c | 1 + 1 file changed, 1 insertion(+) create mode 100644 leanunconvert.c (limited to 'leanunconvert.c') diff --git a/leanunconvert.c b/leanunconvert.c new file mode 100644 index 0000000..4880729 --- /dev/null +++ b/leanunconvert.c @@ -0,0 +1 @@ +#include "fftease.h" /* unconvert essentially undoes what convert does, i.e., it turns N2+1 PAIRS of amplitude and frequency values in C into N2 PAIR of complex spectrum data (in rfft format) in output array S; sampling rate R and interpolation factor I are used to recompute phase values from frequencies */ void leanunconvert( float *C, float *S, int N2 ) { double cos(), sin(); int real, imag, amp, phase; register int i; for ( i = 0; i <= N2; i++ ) { imag = phase = ( real = amp = i<<1 ) + 1; S[real] = *(C+amp) * cos( *(C+phase) ); if ( i != N2 ) S[imag] = -*(C+amp) * sin( *(C+phase) ); } } \ No newline at end of file -- cgit v1.2.1