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Diffstat (limited to 'src/tab_rfft.c')
-rw-r--r--src/tab_rfft.c93
1 files changed, 49 insertions, 44 deletions
diff --git a/src/tab_rfft.c b/src/tab_rfft.c
index 353b047..1a3608f 100644
--- a/src/tab_rfft.c
+++ b/src/tab_rfft.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"
@@ -10,6 +10,7 @@ iem_tab written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006
/* -------------------------- tab_rfft ------------------------------ */
+/* real time domain FFT to complex spectral domain */
typedef struct _tab_rfft
{
@@ -21,9 +22,9 @@ typedef struct _tab_rfft
int x_offset_dst_re;
int x_offset_dst_im;
int x_fftsize;
- t_float *x_beg_mem_src1;
- t_float *x_beg_mem_dst_re;
- t_float *x_beg_mem_dst_im;
+ iemarray_t *x_beg_mem_src1;
+ iemarray_t *x_beg_mem_dst_re;
+ iemarray_t *x_beg_mem_dst_im;
TAB_COMPLEX *x_sin_cos;
t_symbol *x_sym_src1;
t_symbol *x_sym_dst_re;
@@ -92,7 +93,7 @@ static void tab_rfft_bang(t_tab_rfft *x)
int fs2 = fftsize / 2;
TAB_COMPLEX w;
TAB_COMPLEX *sincos = x->x_sin_cos;
- t_float *vec_src, *vec_dst_re, *vec_dst_im;
+ iemarray_t *vec_src, *vec_dst_re, *vec_dst_im;
t_float old1_re, old1_im, old2_re, old2_im;
ok_src = iem_tab_check_arrays(gensym("tab_rfft"), x->x_sym_src1, &x->x_beg_mem_src1, &x->x_size_src1, fftsize);
@@ -108,8 +109,8 @@ static void tab_rfft_bang(t_tab_rfft *x)
for(k=0; k<fftsize; k++)
{
- vec_dst_re[k] = vec_src[k];
- vec_dst_im[k] = 0.0f;
+ iemarray_setfloat(vec_dst_re, k, iemarray_getfloat(vec_src, k));
+ iemarray_setfloat(vec_dst_im, k, 0.0f);
}
i_inc = fs2;
@@ -122,15 +123,16 @@ static void tab_rfft_bang(t_tab_rfft *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++;
}
@@ -152,12 +154,12 @@ static void tab_rfft_bang(t_tab_rfft *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);
}
}
@@ -174,11 +176,12 @@ static void tab_rfft_bang(t_tab_rfft *x)
}
*/
- vec_dst_im[fs2] = 0.0f;
+ iemarray_setfloat(vec_dst_im, 0, 0.0f);
+ iemarray_setfloat(vec_dst_im, fs2, 0.0f);
for(i = fs2+1; i < fftsize; i++)
{
- vec_dst_re[i] = 0.0f;
- vec_dst_im[i] = 0.0f;
+ iemarray_setfloat(vec_dst_re, i, 0.0f);
+ iemarray_setfloat(vec_dst_im, i, 0.0f);
}
outlet_bang(x->x_obj.ob_outlet);
@@ -200,7 +203,7 @@ static void tab_rfft_list(t_tab_rfft *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, *vec_dst_re, *vec_dst_im;
+ iemarray_t *vec_src, *vec_dst_re, *vec_dst_im;
t_float old1_re, old1_im, old2_re, old2_im;
if((argc >= 3) &&
@@ -232,8 +235,8 @@ static void tab_rfft_list(t_tab_rfft *x, t_symbol *s, int argc, t_atom *argv)
for(k=0; k<fftsize; k++)
{
- vec_dst_re[k] = vec_src[k];
- vec_dst_im[k] = 0.0f;
+ iemarray_setfloat(vec_dst_re, k, iemarray_getfloat(vec_src, k));
+ iemarray_setfloat(vec_dst_im, k, 0.0f);
}
i_inc = fs2;
@@ -246,15 +249,16 @@ static void tab_rfft_list(t_tab_rfft *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++;
}
@@ -276,12 +280,12 @@ static void tab_rfft_list(t_tab_rfft *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);
}
}
@@ -298,11 +302,12 @@ static void tab_rfft_list(t_tab_rfft *x, t_symbol *s, int argc, t_atom *argv)
}
*/
- vec_dst_im[fs2] = 0.0f;
+ iemarray_setfloat(vec_dst_im, 0, 0.0f);
+ iemarray_setfloat(vec_dst_im, fs2, 0.0f);
for(i = fs2+1; i < fftsize; i++)
{
- vec_dst_re[i] = 0.0f;
- vec_dst_im[i] = 0.0f;
+ iemarray_setfloat(vec_dst_re, i, 0.0f);
+ iemarray_setfloat(vec_dst_im, i, 0.0f);
}
outlet_bang(x->x_obj.ob_outlet);
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-18 16:00:51 +0000