/*************************************************************************//*                                                                       *//*                  Language Technologies Institute                      *//*                     Carnegie Mellon University                        *//*                        Copyright (c) 2001                             *//*                        All Rights Reserved.                           *//*                                                                       *//*  Permission is hereby granted, free of charge, to use and distribute  *//*  this software and its documentation without restriction, including   *//*  without limitation the rights to use, copy, modify, merge, publish,  *//*  distribute, sublicense, and/or sell copies of this work, and to      *//*  permit persons to whom this work is furnished to do so, subject to   *//*  the following conditions:                                            *//*   1. The code must retain the above copyright notice, this list of    *//*      conditions and the following disclaimer.                         *//*   2. Any modifications must be clearly marked as such.                *//*   3. Original authors' names are not deleted.                         *//*   4. The authors' names are not used to endorse or promote products   *//*      derived from this software without specific prior written        *//*      permission.                                                      *//*                                                                       *//*  CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK         *//*  DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING      *//*  ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT   *//*  SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE      *//*  FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES    *//*  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN   *//*  AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,          *//*  ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF       *//*  THIS SOFTWARE.                                                       *//*                                                                       *//*************************************************************************//*             Author:  Alan W Black (awb@cs.cmu.edu)                    *//*               Date:  January 2001                                     *//*************************************************************************//*                                                                       *//*  Sun/Solaris audio support                                            *//*                                                                       *//*************************************************************************/ #include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <errno.h>#include <sys/filio.h>#include <sys/audioio.h>#include "cst_string.h"#include "cst_wave.h"#include "cst_audio.h" static const char *sun_audio_device = "/dev/audio"; cst_audiodev *audio_open_sun(int sps, int channels, cst_audiofmt fmt){    audio_info_t ainfo;    int fd;    cst_audiodev *ad;    char *audio_device;     if ((fd = open(sun_audio_device,O_WRONLY)) < 0)    {        /* the device might be a SunRay, so get the AUDIODEV env var */        audio_device = getenv("AUDIODEV");		if (audio_device != NULL) {   	    if ((fd = open(audio_device,O_WRONLY)) < 0) {	        cst_errmsg("sun_audio: failed to open audio device %s: %s\n",			   audio_device, strerror(errno));	    }	} else {	    cst_errmsg("sun_audio: failed to open audio device %s: %s\n",		       sun_audio_device, strerror(errno));	    cst_error();	}    }    ioctl(fd,AUDIO_GETINFO,&ainfo);     switch (fmt)    {    case CST_AUDIO_LINEAR16:	ainfo.play.encoding = AUDIO_ENCODING_LINEAR;	ainfo.play.precision = 16;	break;    case CST_AUDIO_LINEAR8:	ainfo.play.encoding = AUDIO_ENCODING_LINEAR;	ainfo.play.precision = 8;	break;    case CST_AUDIO_MULAW:	ainfo.play.encoding = AUDIO_ENCODING_ULAW;	ainfo.play.precision = 8;	break;    }     ainfo.play.channels = 1;    ainfo.play.sample_rate = sps;     if (ioctl(fd,AUDIO_SETINFO,&ainfo) == -1)    {	cst_errmsg("sun_audio: failed to set audio params: %s\n",		   strerror(errno));	close(fd);	cst_error();    }     ad = cst_alloc(cst_audiodev, 1);     ad->sps = sps;    ad->real_sps = ainfo.play.sample_rate;     ad->channels = channels;    ad->real_channels = ainfo.play.channels;     ad->fmt = fmt;    if (ainfo.play.encoding == AUDIO_ENCODING_LINEAR)    {	if (ainfo.play.precision == 16)	    ad->real_fmt = CST_AUDIO_LINEAR16;	else if (ainfo.play.precision == 8)	    ad->real_fmt = CST_AUDIO_LINEAR8;	else	{	    cst_errmsg("sun_audio: linear %d bit audio unsupported\n",		       ainfo.play.precision);	    close(fd);	    cst_free(ad);	    cst_error();	}    }    else if (ainfo.play.encoding == AUDIO_ENCODING_ULAW)	ad->real_fmt = CST_AUDIO_MULAW;    else    {	    cst_errmsg("sun_audio: unsupported audio format (%d bit/encoding #%d)\n",		       ainfo.play.precision, ainfo.play.encoding);	    close(fd);	    cst_free(ad);	    cst_error();    }    ad->platform_data = (void *)fd;     return ad;} int audio_close_sun(cst_audiodev *ad){    int rv;     if (ad == NULL)	    return 0;     rv = close((int)ad->platform_data);    cst_free(ad);    return rv;} int audio_write_sun(cst_audiodev *ad, void *samples, int num_bytes){    return write((int)ad->platform_data,samples,num_bytes);} int audio_flush_sun(cst_audiodev *ad){    return ioctl((int)ad->platform_data, AUDIO_DRAIN, 0);} /* FIXME... */int audio_drain_sun(cst_audiodev *ad){    return ioctl((int)ad->platform_data, AUDIO_DRAIN, 0);}