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/*
* demod_display.c -- signal display
*
* Copyright (C) 1996
* Thomas Sailer (sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef NO_X11
/* ---------------------------------------------------------------------- */
#include "multimon.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <signal.h>
#include <math.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
/* ---------------------------------------------------------------------- */
#define SAMPLING_RATE 22050
/* ---------------------------------------------------------------------- */
static void scope_init(struct demod_state *s)
{
memset(&s->l1.scope, 0, sizeof(s->l1.scope));
s->l1.scope.dispnum = xdisp_start();
if (s->l1.scope.dispnum == -1)
return;
}
/* ---------------------------------------------------------------------- */
#define MEMSIZE sizeof(s->l1.scope.data)/sizeof(s->l1.scope.data[0])
static void scope_demod(struct demod_state *s, buffer_t buffer, int length)
{
const float *src;
float *dst;
int i;
if (s->l1.scope.dispnum == -1)
return;
if ( (unsigned int) length >= MEMSIZE) {
src = buffer.fbuffer+length-MEMSIZE;
dst = s->l1.scope.data;
i = MEMSIZE;
} else {
i = MEMSIZE-length;
memmove(s->l1.scope.data, s->l1.scope.data+i,
i*sizeof(s->l1.scope.data[0]));
src = buffer.fbuffer;
dst = s->l1.scope.data+i;
i = length;
}
s->l1.scope.datalen += i;
memcpy(dst, src, i*sizeof(s->l1.scope.data[0]));
if ( (unsigned int) s->l1.scope.datalen < MEMSIZE)
return;
if (xdisp_update(s->l1.scope.dispnum, s->l1.scope.data))
s->l1.scope.datalen = 0;
}
/* ---------------------------------------------------------------------- */
const struct demod_param demod_scope = {
"SCOPE", true, SAMPLING_RATE, 0, scope_init, scope_demod, NULL
};
/* ---------------------------------------------------------------------- */
#endif //NO_X11
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