ref: 14e5a6c6bd5b3e8a936cd2184f9e2be59376357b
dir: /src/audio/au_sun.c/
/*************************************************************************/
/* */
/* 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);
}