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/*
* Copyright (c) 1999 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------
*
* isdnphone - audio operations
* ============================
*
* $Id: audio.c,v 1.5 1999/12/13 21:25:26 hm Exp $
*
* $FreeBSD$
*
* last edit-date: [Mon Dec 13 21:52:39 1999]
*
*----------------------------------------------------------------------------*/
#include "defs.h"
/*---------------------------------------------------------------------------*
*
*---------------------------------------------------------------------------*/
int
init_audio(char *audiodevice)
{
int ret;
int fd;
u_long fmt = 0;
snd_chan_param pa;
struct snd_size sz;
snd_capabilities soundcaps;
if((fd = open(audiodevice, O_RDWR)) < 0)
{
fprintf(stderr, "unable to open %s: %s\n", audiodevice, strerror(errno));
return(-1);
}
ret = ioctl(fd, AIOGCAP, &soundcaps);
if(ret == -1)
{
fprintf(stderr, "ERROR: ioctl AIOGCAP %s: %s\n", audiodevice, strerror(errno));
return(-1);
}
fmt = soundcaps.formats;
if((fmt & AFMT_FULLDUPLEX) && (!(fmt & AFMT_WEIRD)))
{
#ifdef NOTDEF
if(fmt & AFMT_A_LAW)
{
play_fmt = rec_fmt = AFMT_A_LAW;
}
else
#endif
if(fmt & AFMT_MU_LAW)
{
play_fmt = rec_fmt = AFMT_MU_LAW;
}
else
{
printf("sorry, A-law or u-law not supported!\n");
close(fd);
return(-1);
}
}
else
{
printf("no full-duplex available!\n");
close (fd);
return(-1);
}
pa.play_format = play_fmt;
pa.rec_format = rec_fmt;
pa.play_rate = pa.rec_rate = AUDIORATE;
ret = ioctl(fd, AIOSFMT, &pa);
if(ret == -1)
{
fprintf(stderr, "ERROR: ioctl AIOSFMT %s: %s\n", audiodevice, strerror(errno));
return(-1);
}
sz.play_size = BCH_MAX_DATALEN;
sz.rec_size = BCH_MAX_DATALEN;
ret = ioctl(fd, AIOSSIZE, &sz);
if(ret == -1)
{
fprintf(stderr, "ERROR: ioctl AIOSSIZE %s: %s\n", audiodevice, strerror(errno));
return(-1);
}
return(fd);
}
/*---------------------------------------------------------------------------*
* audio device has speech data from microphone
*---------------------------------------------------------------------------*/
void
audio_hdlr(void)
{
unsigned char buffer[BCH_MAX_DATALEN];
int ret;
ret = read(audiofd, buffer, BCH_MAX_DATALEN);
if(ret < 0)
{
fatal("read audio failed: %s", strerror(errno));
}
debug("audio_hdlr: read %d bytes\n", ret);
if(ret > 0)
{
telwrite(ret, buffer);
}
}
/*---------------------------------------------------------------------------*
* write audio data to loudspeaker
*---------------------------------------------------------------------------*/
void
audiowrite(int len, unsigned char *buf)
{
if((write(audiofd, buf, len)) < 0)
{
fatal("write audio failed: %s", strerror(errno));
}
}
/* EOF */
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