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/*
* dtmf-dial 0.1
* (C) 1998 Itai Nahshon (nahshon@actcom.co.il)
*
* Use and redistribution are subject to the GNU GENERAL PUBLIC LICENSE.
*/
#include <math.h>
#include <stdio.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/soundcard.h>
#define DEBUG(x)
void gen_costab(void);
void dial_digit(int c);
void silent(int msec);
void dial(int f1, int f2, int msec);
char *output = "/dev/dsp";
int bits = 8;
int speed = 8000;
int tone_time = 100;
int silent_time = 50;
int sleep_time = 500;
int volume = 100;
int format = AFMT_U8;
int use_audio = 1;
#define BSIZE 4096
unsigned char *buf;
int bufsize = BSIZE;
int bufidx;
#define MINTABSIZE 2
#define MAXTABSIZE 65536
signed short *costab;
int tabsize = 256;
int dialed = 0;
int right = 0;
int left = 0;
int fd;
void
Usage(void) {
fprintf(stderr, "usage: dial [options] number ...\n"
" Valid options with their default values are:\n"
" Duration options:\n"
" --tone-time 100\n"
" --silent-time 50\n"
" --sleep-time 500\n"
" Audio output options:\n"
" --output-dev /dev/dsp\n"
" --use-audio 1\n"
" --bufsize 4096\n"
" --speed 8000\n"
" --bits 8\n"
" Audio generation options:\n"
" --table-size 256\n"
" --volume 100\n"
" --left 0\n"
" --right 0\n"
);
exit(1);
}
void
initialize_audiodev(void) {
int speed_local = speed;
int channels = 1;
int diff;
if(!use_audio)
return;
if(right || left)
channels = 2;
if(ioctl(fd, SNDCTL_DSP_CHANNELS, &channels)) {
perror("ioctl(SNDCTL_DSP_CHANNELS)");
exit(1);
}
if(ioctl(fd, SNDCTL_DSP_SETFMT, &format)) {
perror("ioctl(SNDCTL_DSP_SPEED)");
exit(1);
}
if(ioctl(fd, SNDCTL_DSP_SPEED, &speed_local)) {
perror("ioctl(SNDCTL_DSP_SPEED)");
exit(1);
}
diff = speed_local - speed;
if(diff < 0)
diff = -diff;
if(diff > 500) {
fprintf(stderr,
"Your sound card does not support the requested speed\n");
exit(1);
}
if(diff != 0) {
fprintf(stderr,
"Setting speed to %d\n", speed_local);
}
speed = speed_local;
}
void
getvalue(int *arg, int *index, int argc,
char **argv, int min, int max) {
if (*index >= argc-1)
Usage();
*arg = atoi(argv[1+*index]);
if(*arg < min || *arg > max) {
fprintf(stderr, "Value for %s should be in the range %d..%d\n",
argv[*index]+2, min, max);
exit(1);
}
++*index;
}
void
main(int argc, char **argv)
{
char *cp;
int i;
for(i = 1; i < argc; i++) {
if(argv[i][0] != '-' ||
argv[i][1] != '-')
break;
if(!strcmp(argv[i], "--table-size")) {
getvalue(&tabsize, &i, argc, argv,
MINTABSIZE, MAXTABSIZE);
}
else if(!strcmp(argv[i], "--tone-time")) {
getvalue(&tone_time, &i, argc, argv,
10, 10000);
}
else if(!strcmp(argv[i], "--sleep-time")) {
getvalue(&sleep_time, &i, argc, argv,
10, 10000);
}
else if(!strcmp(argv[i], "--silent-time")) {
getvalue(&silent_time, &i, argc, argv,
10, 10000);
}
else if(!strcmp(argv[i], "--sleep-time")) {
getvalue(&sleep_time, &i, argc, argv,
10, 100000);
}
else if(!strcmp(argv[i], "--volume")) {
getvalue(&volume, &i, argc, argv,
0, 100);
}
else if(!strcmp(argv[i], "--speed")) {
getvalue(&speed, &i, argc, argv,
5000, 48000);
}
else if(!strcmp(argv[i], "--bits")) {
getvalue(&bits, &i, argc, argv,
8, 16);
}
else if(!strcmp(argv[i], "--bufsize")) {
getvalue(&bufsize, &i, argc, argv,
4, 65536);
}
else if(!strcmp(argv[i], "--use-audio")) {
getvalue(&use_audio, &i, argc, argv,
0, 1);
}
else if(!strcmp(argv[i], "--right")) {
getvalue(&right, &i, argc, argv,
0, 1);
}
else if(!strcmp(argv[i], "--left")) {
getvalue(&left, &i, argc, argv,
0, 1);
}
else if(!strcmp(argv[i], "--output-dev")) {
i++;
if(i >= argc)
Usage();
output = argv[i];
}
else
Usage();
}
if(i >= argc)
Usage();
if(!strcmp(output, "-"))
fd = 1; /* stdout */
else {
fd = open(output, O_CREAT|O_TRUNC|O_WRONLY, 0644);
if(fd < 0) {
perror(output);
exit(1);
}
}
switch(bits) {
case 8:
format = AFMT_U8;
break;
case 16:
format = AFMT_S16_LE;
break;
default:
fprintf(stderr, "Value for bits should be 8 or 16\n");
exit(1);
}
initialize_audiodev();
gen_costab();
buf = malloc(bufsize);
if(buf == NULL) {
perror("malloc buf");
exit(1);
}
bufidx = 0;
for(; i < argc; i++) {
cp = argv[i];
if(dialed)
silent(sleep_time);
while(cp && *cp) {
if(*cp == ',' || *cp == ' ')
silent(sleep_time);
else {
if(dialed)
silent(silent_time);
dial_digit(*cp);
}
cp++;
}
}
if(bufidx > 0) {
#if 0
while(bufidx < bufsize) {
if(format == AFMT_U8) {
buf[bufidx++] = 128;
}
else { /* AFMT_S16_LE */
buf[bufidx++] = 0;
buf[bufidx++] = 0;
}
}
#endif
write(fd, buf, bufidx);
}
exit(0);
}
void
dial_digit(int c) {
DEBUG(fprintf(stderr, "dial_digit %#c\n", c));
switch(c) {
case '0':
dial(941, 1336, tone_time);
break;
case '1':
dial(697, 1209, tone_time);
break;
case '2':
dial(697, 1336, tone_time);
break;
case '3':
dial(697, 1477, tone_time);
break;
case '4':
dial(770, 1209, tone_time);
break;
case '5':
dial(770, 1336, tone_time);
break;
case '6':
dial(770, 1477, tone_time);
break;
case '7':
dial(852, 1209, tone_time);
break;
case '8':
dial(852, 1336, tone_time);
break;
case '9':
dial(852, 1477, tone_time);
break;
case '*':
dial(941, 1209, tone_time);
break;
case '#':
dial(941, 1477, tone_time);
break;
case 'A':
dial(697, 1633, tone_time);
break;
case 'B':
dial(770, 1633, tone_time);
break;
case 'C':
dial(852, 1633, tone_time);
break;
case 'D':
dial(941, 1633, tone_time);
break;
}
}
void
silent(int msec) {
int time;
if(msec <= 0)
return;
DEBUG(fprintf(stderr, "silent %d\n", msec));
time = (msec * speed) / 1000;
while(--time >= 0) {
if(format == AFMT_U8) {
buf[bufidx++] = 128;
}
else { /* AFMT_S16_LE */
buf[bufidx++] = 0;
buf[bufidx++] = 0;
}
if(right || left) {
if(format == AFMT_U8) {
buf[bufidx++] = 128;
}
else { /* AFMT_S16_LE */
buf[bufidx++] = 0;
buf[bufidx++] = 0;
}
}
if(bufidx >= bufsize) {
write(fd, buf, bufsize);
bufidx = 0;
}
}
dialed = 0;
}
void
dial(int f1, int f2, int msec) {
int i1, i2, d1, d2, e1, e2, g1, g2;
int time;
int val;
if(msec <= 0)
return;
DEBUG(fprintf(stderr, "dial %d %d %d\n", f1, f2, msec));
f1 *= tabsize;
f2 *= tabsize;
d1 = f1 / speed;
d2 = f2 / speed;
g1 = f1 - d1 * speed;
g2 = f2 - d2 * speed;
e1 = speed/2;
e2 = speed/2;
i1 = i2 = 0;
time = (msec * speed) / 1000;
while(--time >= 0) {
val = costab[i1] + costab[i2];
if(left || !right) {
if(format == AFMT_U8) {
buf[bufidx++] = 128 + (val >> 8);
}
else { /* AFMT_S16_LE */
buf[bufidx++] = val & 0xff;
buf[bufidx++] = (val >> 8) & 0xff;
}
}
if (left != right) {
if(format == AFMT_U8) {
buf[bufidx++] = 128;
}
else { /* AFMT_S16_LE */
buf[bufidx++] = 0;
buf[bufidx++] = 0;
}
}
if(right) {
if(format == AFMT_U8) {
buf[bufidx++] = 128 + (val >> 8);
}
else { /* AFMT_S16_LE */
buf[bufidx++] = val & 0xff;
buf[bufidx++] = (val >> 8) & 0xff;
}
}
i1 += d1;
if (e1 < 0) {
e1 += speed;
i1 += 1;
}
if (i1 >= tabsize)
i1 -= tabsize;
i2 += d2;
if (e2 < 0) {
e2 += speed;
i2 += 1;
}
if (i2 >= tabsize)
i2 -= tabsize;
if(bufidx >= bufsize) {
write(fd, buf, bufsize);
bufidx = 0;
}
e1 -= g1;
e2 -= g2;
}
dialed = 1;
}
void
gen_costab(void) {
int i;
double d;
costab = (signed short *)malloc(tabsize * sizeof(signed short));
if(costab == NULL) {
perror("malloc costab");
exit(1);
}
for (i = 0; i < tabsize; i++) {
d = 2*M_PI*i;
costab[i] = (int)((volume/100.)*16383.*cos(d/tabsize));
}
}
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