home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
ftp.ee.lbl.gov
/
2014.05.ftp.ee.lbl.gov.tar
/
ftp.ee.lbl.gov
/
sst.tar.Z
/
sst.tar
/
sst
/
listen.c
< prev
next >
Wrap
C/C++ Source or Header
|
1990-01-10
|
1KB
|
62 lines
/* listen.c - hardware loopback, connect microphone to speaker
**
** Copyright (C) 1989 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include <stdio.h>
#include <sys/signal.h>
#include "libsst.h"
int sst_fd;
main( argc, argv )
int argc;
char *argv[];
{
struct audio_ioctl ai;
int junk;
int sighandler();
sst_fd = sst_open( );
(void) signal( SIGHUP, sighandler );
(void) signal( SIGINT, sighandler );
ai.control = AUDIO_MUX_MCR1;
if ( ioctl( sst_fd, AUDIOGETREG, &ai ) < 0 )
{
perror( "GETREG MCR1" );
exit( 1 );
}
ai.data[0] = ( AUDIO_MUX_PORT_BA << 4 ) | AUDIO_MUX_PORT_BA;
if ( ioctl( sst_fd, AUDIOSETREG, &ai ) < 0 )
{
perror( "SETREG MCR1" );
exit( 1 );
}
if ( ioctl( sst_fd, AUDIOREADSTART, &junk ) < 0 )
{
perror( "AUDIOREADSTART" );
exit( 1 );
}
for ( ; ; )
pause( );
/* NOTREACHED */
}
int
sighandler( )
{
sst_close( sst_fd );
exit( 1 );
}