diff options
Diffstat (limited to 'externals/grill/fftease/src/leanunconvert.c')
-rw-r--r-- | externals/grill/fftease/src/leanunconvert.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/externals/grill/fftease/src/leanunconvert.c b/externals/grill/fftease/src/leanunconvert.c deleted file mode 100644 index f8575168..00000000 --- a/externals/grill/fftease/src/leanunconvert.c +++ /dev/null @@ -1,23 +0,0 @@ -#include "pv.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 ) -{ - int real, imag, - amp, phase; - float a, b; - 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) ); - } -} - |