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-rw-r--r--src/tab_ifft.c89
1 files changed, 46 insertions, 43 deletions
diff --git a/src/tab_ifft.c b/src/tab_ifft.c
index b3b95b0..730db29 100644
--- a/src/tab_ifft.c
+++ b/src/tab_ifft.c
@@ -1,7 +1,7 @@
/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-iem_tab written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */
+iem_tab written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2009 */
#include "m_pd.h"
#include "iemlib.h"
@@ -9,6 +9,7 @@ iem_tab written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006
#include <math.h>
/* -------------------------- tab_ifft ------------------------------ */
+/* complex inverse FFT */
typedef struct _tab_ifft
{
@@ -22,10 +23,10 @@ typedef struct _tab_ifft
int x_offset_dst_re;
int x_offset_dst_im;
int x_fftsize;
- t_float *x_beg_mem_src_re;
- t_float *x_beg_mem_src_im;
- t_float *x_beg_mem_dst_re;
- t_float *x_beg_mem_dst_im;
+ iemarray_t *x_beg_mem_src_re;
+ iemarray_t *x_beg_mem_src_im;
+ iemarray_t *x_beg_mem_dst_re;
+ iemarray_t *x_beg_mem_dst_im;
TAB_COMPLEX *x_sin_cos;
t_symbol *x_sym_src_re;
t_symbol *x_sym_src_im;
@@ -100,7 +101,7 @@ static void tab_ifft_bang(t_tab_ifft *x)
int fs2 = fftsize / 2;
TAB_COMPLEX w;
TAB_COMPLEX *sincos = x->x_sin_cos;
- t_float *vec_src_re, *vec_src_im, *vec_dst_re, *vec_dst_im;
+ iemarray_t *vec_src_re, *vec_src_im, *vec_dst_re, *vec_dst_im;
t_float old1_re, old1_im, old2_re, old2_im, g;
ok_src_re = iem_tab_check_arrays(gensym("tab_ifft"), x->x_sym_src_re, &x->x_beg_mem_src_re, &x->x_size_src_re, fftsize);
@@ -119,8 +120,8 @@ static void tab_ifft_bang(t_tab_ifft *x)
for(j=0; j<fftsize; j++)
{
- vec_dst_re[j] = vec_src_re[j];
- vec_dst_im[j] = vec_src_im[j];
+ iemarray_setfloat(vec_dst_re, j, iemarray_getfloat(vec_src_re, j));
+ iemarray_setfloat(vec_dst_im, j, iemarray_getfloat(vec_src_im, j));
}
i_inc = fs2;
@@ -133,15 +134,16 @@ static void tab_ifft_bang(t_tab_ifft *x)
w_index = 0;
for(k=0; k<i_inc; k++)
{
- old1_re = vec_dst_re[v_index];
- old1_im = vec_dst_im[v_index];
- old2_re = vec_dst_re[v_index+i_inc];
- old2_im = vec_dst_im[v_index+i_inc];
+ old1_re = iemarray_getfloat(vec_dst_re, v_index);
+ old1_im = iemarray_getfloat(vec_dst_im, v_index);
+ old2_re = iemarray_getfloat(vec_dst_re, v_index+i_inc);
+ old2_im = iemarray_getfloat(vec_dst_im, v_index+i_inc);
+
w = sincos[w_index];
- vec_dst_re[v_index+i_inc] = (old1_re - old2_re)*w.real - (old1_im - old2_im)*w.imag;
- vec_dst_im[v_index+i_inc] = (old1_im - old2_im)*w.real + (old1_re - old2_re)*w.imag;
- vec_dst_re[v_index] = old1_re + old2_re;
- vec_dst_im[v_index] = old1_im + old2_im;
+ iemarray_setfloat(vec_dst_re, v_index+i_inc, (old1_re - old2_re)*w.real - (old1_im - old2_im)*w.imag);
+ iemarray_setfloat(vec_dst_im, v_index+i_inc, (old1_im - old2_im)*w.real + (old1_re - old2_re)*w.imag);
+ iemarray_setfloat(vec_dst_re, v_index, old1_re + old2_re);
+ iemarray_setfloat(vec_dst_im, v_index, old1_im + old2_im);
w_index += w_inc;
v_index++;
}
@@ -163,12 +165,12 @@ static void tab_ifft_bang(t_tab_ifft *x)
j = j + k;
if(i < j)
{
- old1_re = vec_dst_re[j];
- old1_im = vec_dst_im[j];
- vec_dst_re[j] = vec_dst_re[i];
- vec_dst_im[j] = vec_dst_im[i];
- vec_dst_re[i] = old1_re;
- vec_dst_im[i] = old1_im;
+ old1_re = iemarray_getfloat(vec_dst_re, j);
+ old1_im = iemarray_getfloat(vec_dst_im, j);
+ iemarray_setfloat(vec_dst_re, j, iemarray_getfloat(vec_dst_re, i));
+ iemarray_setfloat(vec_dst_im, j, iemarray_getfloat(vec_dst_im, i));
+ iemarray_setfloat(vec_dst_re, i, old1_re);
+ iemarray_setfloat(vec_dst_im, i, old1_im);
}
}
@@ -188,8 +190,8 @@ static void tab_ifft_bang(t_tab_ifft *x)
g = 1.0f / (t_float)fftsize;
for(i = 0; i < fftsize; i++)
{
- vec_dst_re[i] *= g;
- vec_dst_im[i] *= g;
+ iemarray_setfloat(vec_dst_re, i, iemarray_getfloat(vec_dst_re, i)*g);
+ iemarray_setfloat(vec_dst_im, i, iemarray_getfloat(vec_dst_im, i)*g);
}
outlet_bang(x->x_obj.ob_outlet);
@@ -211,7 +213,7 @@ static void tab_ifft_list(t_tab_ifft *x, t_symbol *s, int argc, t_atom *argv)
int fs2 = fftsize / 2;
TAB_COMPLEX w;
TAB_COMPLEX *sincos = x->x_sin_cos;
- t_float *vec_src_re, *vec_src_im, *vec_dst_re, *vec_dst_im;
+ iemarray_t *vec_src_re, *vec_src_im, *vec_dst_re, *vec_dst_im;
t_float old1_re, old1_im, old2_re, old2_im, g;
if((argc >= 4) &&
@@ -249,8 +251,8 @@ static void tab_ifft_list(t_tab_ifft *x, t_symbol *s, int argc, t_atom *argv)
for(j=0; j<fftsize; j++)
{
- vec_dst_re[j] = vec_src_re[j];
- vec_dst_im[j] = vec_src_im[j];
+ iemarray_setfloat(vec_dst_re, j, iemarray_getfloat(vec_src_re, j));
+ iemarray_setfloat(vec_dst_im, j, iemarray_getfloat(vec_src_im, j));
}
i_inc = fs2;
@@ -263,15 +265,16 @@ static void tab_ifft_list(t_tab_ifft *x, t_symbol *s, int argc, t_atom *argv)
w_index = 0;
for(k=0; k<i_inc; k++)
{
- old1_re = vec_dst_re[v_index];
- old1_im = vec_dst_im[v_index];
- old2_re = vec_dst_re[v_index+i_inc];
- old2_im = vec_dst_im[v_index+i_inc];
+ old1_re = iemarray_getfloat(vec_dst_re, v_index);
+ old1_im = iemarray_getfloat(vec_dst_im, v_index);
+ old2_re = iemarray_getfloat(vec_dst_re, v_index+i_inc);
+ old2_im = iemarray_getfloat(vec_dst_im, v_index+i_inc);
+
w = sincos[w_index];
- vec_dst_re[v_index+i_inc] = (old1_re - old2_re)*w.real - (old1_im - old2_im)*w.imag;
- vec_dst_im[v_index+i_inc] = (old1_im - old2_im)*w.real + (old1_re - old2_re)*w.imag;
- vec_dst_re[v_index] = old1_re + old2_re;
- vec_dst_im[v_index] = old1_im + old2_im;
+ iemarray_setfloat(vec_dst_re, v_index+i_inc, (old1_re - old2_re)*w.real - (old1_im - old2_im)*w.imag);
+ iemarray_setfloat(vec_dst_im, v_index+i_inc, (old1_im - old2_im)*w.real + (old1_re - old2_re)*w.imag);
+ iemarray_setfloat(vec_dst_re, v_index, old1_re + old2_re);
+ iemarray_setfloat(vec_dst_im, v_index, old1_im + old2_im);
w_index += w_inc;
v_index++;
}
@@ -293,12 +296,12 @@ static void tab_ifft_list(t_tab_ifft *x, t_symbol *s, int argc, t_atom *argv)
j = j + k;
if(i < j)
{
- old1_re = vec_dst_re[j];
- old1_im = vec_dst_im[j];
- vec_dst_re[j] = vec_dst_re[i];
- vec_dst_im[j] = vec_dst_im[i];
- vec_dst_re[i] = old1_re;
- vec_dst_im[i] = old1_im;
+ old1_re = iemarray_getfloat(vec_dst_re, j);
+ old1_im = iemarray_getfloat(vec_dst_im, j);
+ iemarray_setfloat(vec_dst_re, j, iemarray_getfloat(vec_dst_re, i));
+ iemarray_setfloat(vec_dst_im, j, iemarray_getfloat(vec_dst_im, i));
+ iemarray_setfloat(vec_dst_re, i, old1_re);
+ iemarray_setfloat(vec_dst_im, i, old1_im);
}
}
@@ -318,8 +321,8 @@ static void tab_ifft_list(t_tab_ifft *x, t_symbol *s, int argc, t_atom *argv)
g = 1.0f / (t_float)fftsize;
for(i = 0; i < fftsize; i++)
{
- vec_dst_re[i] *= g;
- vec_dst_im[i] *= g;
+ iemarray_setfloat(vec_dst_re, i, iemarray_getfloat(vec_dst_re, i)*g);
+ iemarray_setfloat(vec_dst_im, i, iemarray_getfloat(vec_dst_im, i)*g);
}
outlet_bang(x->x_obj.ob_outlet);
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-24 09:36:37 +0000