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