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/* Double Median Filter
* Copyright (C) 1998 J.A. Bezemer
*
* Licensed under the terms of the GNU General Public License.
* ABSOLUTELY NO WARRANTY.
* See the file `COPYING' in this directory.
*/
#include "signpr_doubmed.h"
#include "signpr_general.h"
#include "errorwindow.h"
#include "stringinput.h"
#include "buttons.h"
#include "clrscr.h"
#include "boxes.h"
#include "helpline.h"
#include <stdlib.h>
#include <stdio.h>
#ifndef OLD_CURSES
#include <ncurses.h>
#else
#include <curses.h>
#endif
void
double_median_param_defaults (parampointer_t parampointer)
{
parampointer->postlength1 = 2;
parampointer->prelength1 = 2;
parampointer->postlength2 = 2;
parampointer->prelength2 = 2;
}
void
double_median_param_screen (parampointer_t parampointer)
{
stringinput_t medlength1str, medlength2str;
button_t ok_button, cancel_button;
int dont_stop = TRUE;
int returnval = 0;
int focus = 0;
int in_ch;
int i;
long helplong;
char *helplines[4] =
{
" ^: more distortion. v: less effective against ticks. ",
" ^: less correction of distortion. v: more (faulty) correction. ",
" Discard changes. ",
" Accept changes. "};
medlength1str.maxlen = 500;
medlength1str.string = (char *) malloc (medlength1str.maxlen *
sizeof (char));
sprintf (medlength1str.string, "%ld", parampointer->prelength1 +
parampointer->postlength1 + 1);
medlength1str.y = 6;
medlength1str.x = 57;
medlength1str.w = 19;
medlength1str.cursorpos = strlen (medlength1str.string);
medlength1str.firstcharonscreen = 0;
medlength2str.maxlen = 500;
medlength2str.string = (char *) malloc (medlength2str.maxlen *
sizeof (char));
sprintf (medlength2str.string, "%ld", parampointer->prelength2 +
parampointer->postlength2 + 1);
medlength2str.y = 8;
medlength2str.x = 57;
medlength2str.w = 19;
medlength2str.cursorpos = strlen (medlength2str.string);
medlength2str.firstcharonscreen = 0;
ok_button.text = " OK ";
ok_button.y = 20;
ok_button.x = 71;
ok_button.selected = FALSE;
cancel_button.text = " Cancel ";
cancel_button.y = 20;
cancel_button.x = 5;
cancel_button.selected = FALSE;
clearscreen (SIGNPR_DOUBMED_PARAMSCR_HEADERTEXT);
do
{
header (SIGNPR_DOUBMED_PARAMSCR_HEADERTEXT);
if (focus == 2)
cancel_button.selected = TRUE;
else
cancel_button.selected = FALSE;
if (focus == 3)
ok_button.selected = TRUE;
else
ok_button.selected = FALSE;
mvprintw (3, 2,
"See the Signproc.txt file for the meaning of the parameters.");
stringinput_display (&medlength1str);
mvprintw (medlength1str.y, 2,
"Number of samples for the first median:");
stringinput_display (&medlength2str);
mvprintw (medlength2str.y, 2,
"Number of samples for the second (correction) median:");
button_display (&cancel_button);
mybox (cancel_button.y - 1, cancel_button.x - 1,
3, strlen (cancel_button.text) + 2);
button_display (&ok_button);
mybox (ok_button.y - 1, ok_button.x - 1,
3, strlen (ok_button.text) + 2);
helpline (helplines[focus]);
switch (focus)
{
case 0:
stringinput_display (&medlength1str);
break;
case 1:
stringinput_display (&medlength2str);
break;
default:
move (0, 79);
}
refresh ();
in_ch = getch ();
switch (focus)
{
case 0: /* medlength1str */
stringinput_stdkeys (in_ch, &medlength1str);
switch (in_ch)
{
case KEY_ENTER:
case 13:
i = sscanf (medlength1str.string, "%li", &helplong);
if (i < 1 || helplong < 1 || helplong % 2 == 0)
error_window ("A whole, odd number, greater than 0, must \
be specified.");
else
focus = 1;
break;
case KEY_UP:
focus--;
break;
case KEY_DOWN:
focus++;
break;
}
break;
case 1: /* medlength2str */
stringinput_stdkeys (in_ch, &medlength2str);
switch (in_ch)
{
case KEY_ENTER:
case 13:
i = sscanf (medlength2str.string, "%li", &helplong);
if (i < 1 || helplong < 1 || helplong % 2 == 0)
error_window ("A whole, odd number, greater than 0, must \
be specified.");
else
focus = 3;
break;
case KEY_UP:
focus--;
break;
case KEY_DOWN:
focus++;
break;
}
break;
case 2: /* Cancel */
switch (in_ch)
{
case KEY_ENTER:
case 13:
returnval = 0;
dont_stop = FALSE;
break;
case KEY_LEFT:
case KEY_UP:
focus--;
break;
case KEY_RIGHT:
case KEY_DOWN:
focus++;
break;
}
break;
case 3: /* OK */
switch (in_ch)
{
case KEY_ENTER:
case 13:
i = sscanf (medlength1str.string, "%li", &helplong);
if (i < 1 || helplong < 1 || helplong % 2 == 0)
{
error_window ("A whole, odd number, greater than 0, must \
be specified as first median length.");
medlength1str.cursorpos =
strlen (medlength1str.string);
focus = 0;
break;
}
parampointer->prelength1 = (helplong - 1) / 2;
parampointer->postlength1 = (helplong - 1) / 2;
i = sscanf (medlength2str.string, "%li", &helplong);
if (i < 1 || helplong < 1 || helplong % 2 == 0)
{
error_window ("A whole, odd number, greater than 0, must \
be specified as second median length.");
medlength2str.cursorpos =
strlen (medlength2str.string);
focus = 1;
break;
}
parampointer->prelength2 = (helplong - 1) / 2;
parampointer->postlength2 = (helplong - 1) / 2;
dont_stop = FALSE;
break;
case KEY_LEFT:
case KEY_UP:
focus--;
break;
case KEY_RIGHT:
case KEY_DOWN:
focus++;
break;
}
break;
}
if (in_ch == 9) /* TAB */
focus++;
if (in_ch == 27)
dont_stop = FALSE;
if (focus > 3)
focus = 0;
if (focus < 0)
focus = 3;
}
while (dont_stop);
free (medlength1str.string);
free (medlength2str.string);
}
void
init_double_median_filter (int filterno, parampointer_t parampointer)
{
long total_post;
total_post = parampointer->postlength2;
if (parampointer->postlength1 > total_post)
total_post = parampointer->postlength1;
parampointer->buffer = init_buffer (total_post,
parampointer->prelength1 +
parampointer->prelength2);
parampointer->buffer2 = init_buffer (parampointer->postlength2,
parampointer->prelength2);
parampointer->filterno = filterno;
}
void
delete_double_median_filter (parampointer_t parampointer)
{
delete_buffer (¶mpointer->buffer);
delete_buffer (¶mpointer->buffer2);
}
sample_t
double_median_1 (long offset, long offset_zero,
parampointer_t parampointer)
{
sample_t sample;
signed short list1[parampointer->postlength1 + parampointer->prelength1 + 1];
signed short list2[parampointer->postlength1 + parampointer->prelength1 + 1];
long i;
for (i = 0; i <= parampointer->postlength1 +
parampointer->prelength1; i++)
{
sample = get_from_buffer (¶mpointer->buffer,
i - parampointer->postlength1 +
offset + offset_zero);
list1[i] = sample.left;
list2[i] = sample.right;
}
sample.left = median (list1, parampointer->postlength1 +
parampointer->prelength1 + 1);
sample.right = median (list2, parampointer->postlength1 +
parampointer->prelength1 + 1);
return sample;
}
fillfuncpointer_t double_median_1_pointer = double_median_1;
sample_t
double_median_filter (parampointer_t parampointer)
{
sample_t sample;
sample_t sample2;
sample_t returnval;
signed short list1[parampointer->postlength2 + parampointer->prelength2 + 1];
signed short list2[parampointer->postlength2 + parampointer->prelength2 + 1];
long i, j;
advance_current_pos (¶mpointer->buffer, parampointer->filterno);
advance_current_pos_custom (¶mpointer->buffer2,
double_median_1_pointer,
0,
parampointer);
for (i = 0; i <= parampointer->postlength2 +
parampointer->prelength2; i++)
{
sample = get_from_buffer (¶mpointer->buffer,
i - parampointer->postlength2);
sample2 = get_from_buffer (¶mpointer->buffer2,
i - parampointer->postlength2);
j = sample.left - sample2.left;
j /= 2;
list1[i] = j;
j = sample.right - sample2.right;
j /= 2;
list2[i] = j;
}
sample2 = get_from_buffer (¶mpointer->buffer2, 0);
returnval.left = median (list1, parampointer->postlength2 +
parampointer->prelength2 + 1) * 2
+ sample2.left;
returnval.right = median (list2, parampointer->postlength2 +
parampointer->prelength2 + 1) * 2
+ sample2.right;
return returnval;
}
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