diff options
| author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2006-02-09 16:18:39 +0000 |
|---|---|---|
| committer | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2006-02-09 16:18:39 +0000 |
| commit | b418fb91e7bb45d7b5f1eb8b19703441ae94eb13 (patch) | |
| tree | 3f4a32d0b99d4ea0ac602bec59f0d2accba46719 /lib/fold.c | |
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 systemsvn2git-root
svn path=/trunk/externals/fftease/; revision=4574
Diffstat (limited to 'lib/fold.c')
| -rw-r--r-- | lib/fold.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/fold.c b/lib/fold.c new file mode 100644 index 0000000..0523d28 --- /dev/null +++ b/lib/fold.c @@ -0,0 +1 @@ +#include "fftease.h"
/*
* multiply current input I by window W (both of length Nw);
* using modulus arithmetic, fold and rotate windowed input
* into output array O of (FFT) length N according to current
* input time n
*/
void fold( float *I, float *W, int Nw, float *O, int N, int n )
{
int i;
for ( i = 0; i < N; i++ )
O[i] = 0.;
while ( n < 0 )
n += N;
n %= N;
for ( i = 0; i < Nw; i++ ) {
O[n] += I[i]*W[i];
if ( ++n == N )
n = 0;
}
}
\ No newline at end of file |