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|
/*---------------------------------------------------------------------------*
*
* rsynth driver to output to
* - an open isdn4bsd telephone connection or
* - an output file or
* - the /dev/audio device
* ----------------------------------------------------------------
*
* tested with rsynth-2.0
*
* written by Hellmuth Michaelis (hm@kts.org)
*
* last edit-date: [Fri May 25 15:21:33 2001]
*
* $FreeBSD$
*
*---------------------------------------------------------------------------*/
#include <config.h>
#include <useconfig.h>
#include <stdio.h>
#include <math.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/signal.h>
#include <sys/ioctl.h>
#include <machine/i4b_tel_ioctl.h>
#include "proto.h"
#include "getargs.h"
#include "hplay.h"
#include "l2u.h"
#define SAMP_RATE 8000
long samp_rate = SAMP_RATE;
char *prog = "hplay";
static int use_audio = 1;
static int use_isdn = 0;
static int unit_no = 0;
static int audio_fd = -1;
static int isdn_fd = -1;
static int file_fd = -1;
char *audio_dev = "/dev/dsp";
char *isdn_dev = "/dev/i4btel";
static char *ulaw_file = NULL;
int
audio_init(int argc, char *argv[])
{
char dev[64];
int format = CVT_ALAW2ULAW;
prog = argv[0];
argc = getargs("FreeBSD audio/i4b/file output driver",argc, argv,
"a", NULL, &use_audio, "use /dev/audio (default)",
"i", NULL, &use_isdn, "use /dev/i4btel",
"u", "%d", &unit_no, "/dev/i4btel unit number (def = 0)",
"f", "", &ulaw_file, "u-law output to file",
NULL);
if(help_only)
return argc;
if(ulaw_file)
{
if(strcmp(ulaw_file, "-") == 0)
{
file_fd = 1; /* stdout */
}
else
{
file_fd = open(ulaw_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if(file_fd < 0)
fprintf(stderr, "ERROR: cannot open %s, error = %s\n", ulaw_file, strerror(errno));
}
}
if(use_isdn)
{
sprintf(dev, "%s%d", isdn_dev, unit_no);
if((isdn_fd = open(dev, O_WRONLY)) < 0)
{
fprintf(stderr, "ERROR: cannot open %s, error = %s\n", dev, strerror(errno));
}
if((ioctl(isdn_fd, I4B_TEL_SETAUDIOFMT, &format)) < 0)
{
fprintf(stderr, "ioctl I4B_TEL_SETAUDIOFMT failed: %s", strerror(errno));
}
}
if(use_audio)
{
audio_fd = open(audio_dev, O_WRONLY | O_NDELAY);
if(audio_fd < 0)
{
fprintf(stderr, "ERROR: cannot open %s, error = %s\n", audio_dev, strerror(errno));
}
}
return argc;
}
void
audio_term()
{
int format = CVT_NONE;
if(isdn_fd >= 0)
{
if((ioctl(isdn_fd, I4B_TEL_SETAUDIOFMT, &format)) < 0)
{
fprintf(stderr, "ioctl I4B_TEL_SETAUDIOFMT failed: %s", strerror(errno));
}
close(isdn_fd);
isdn_fd = -1;
}
if(audio_fd >= 0)
{
#if 0
ioctl(audio_fd, SNDCTL_DSP_SYNC, &dummy);
#endif
close(audio_fd);
audio_fd = -1;
}
if(file_fd >= 0)
{
close(file_fd);
file_fd = -1;
}
}
void
audio_play(int n, short *data)
{
int ret;
unsigned char *p;
if (n > 0)
{
unsigned char *converted = (unsigned char *) malloc(n);
int i;
if(converted == NULL)
{
fprintf(stderr, "Could not allocate memory for conversion\n");
exit(3);
}
for (i = 0; i < n; i++)
{
converted[i] = short2ulaw(data[i]);
}
if (isdn_fd >= 0)
{
p = converted;
errno = 0;
while((ret = write(isdn_fd, p, n)) != n)
{
if(!errno)
{
p += ret;
if(p > (converted + n))
break;
}
else
{
fprintf(stderr, "write /dev/i4btel ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
break;
}
}
}
for (i = 0; i < n; i++)
converted[i] = (data[i] - 32768) / 256;
if(audio_fd >= 0)
{
p = converted;
errno = 0;
while((ret = write(audio_fd, p, n)) != n)
{
if(!errno)
{
p += ret;
if(p > (converted + n))
break;
}
else
{
fprintf(stderr, "write /dev/dsp ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
break;
}
}
}
if(file_fd >= 0)
{
int ret;
p = converted;
errno = 0;
while((ret = write(file_fd, p, n)) != n)
{
if(!errno)
{
p += ret;
if(p > (converted + n))
break;
}
else
{
fprintf(stderr, "write file ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
break;
}
}
}
free(converted);
}
}
/* EOF */
|
