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changed alloc functions to allow for initialization of user-supplied buffer

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This commit is contained in:
Mark Borgerding
2003-12-14 03:02:30 +00:00
parent ab32979a47
commit 559c14b49b
11 changed files with 135 additions and 112 deletions
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23
_kiss_fft_guts.h
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@ -70,11 +70,19 @@ typedef struct {
#define C_SUBFROM( res , a)\
do { (res).r -= (a).r; (res).i -= (a).i; }while(0)
kiss_fft_cpx kf_cexp(double phase);
int kf_allocsize(int nfft);
void kf_init_state(kiss_fft_state * st,int nfft,int inverse_fft);
static
kiss_fft_cpx kf_cexp(double phase) /* returns e ** (j*phase) */
{
kiss_fft_cpx x;
#ifdef FIXED_POINT
x.r = (kiss_fft_scalar) (32767 * cos (phase));
x.i = (kiss_fft_scalar) (32767 * sin (phase));
#else
x.r = cos (phase);
x.i = sin (phase);
#endif
return x;
}
void kf_work(
kiss_fft_cpx * Fout,
@ -84,3 +92,8 @@ void kf_work(
const kiss_fft_state * st
);
/* a debugging function */
static void pcpx( kiss_fft_cpx * c)
{
fprintf(stderr,"%g + %gi\n",c->r,c->i);
}