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/* sunsound.c: OpenBSD sound I/O
Copyright (c) 2002-2004 Alexander Yurchenko, Russell Marks, Philip Kendall
$Id: sunsound.c 3115 2007-08-19 02:49:14Z fredm $
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#if defined AUDIO_SETINFO || defined HAVE_SYS_AUDIOIO_H
#if defined(__SVR4) && defined(__sun)
#define solaris
#else
#undef solaris
#endif
#include <sys/types.h>
#include <sys/audioio.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <string.h>
#ifdef solaris
#include <stropts.h>
#endif
#include <unistd.h>
#include "settings.h"
#include "sound.h"
#include "ui/ui.h"
/* using (8) 64 byte frags for 8kHz, scale up for higher */
#define BASE_SOUND_FRAG_PWR 6
static int soundfd = -1;
static int sixteenbit = 0;
int
sound_lowlevel_init( const char *device, int *freqptr, int *stereoptr )
{
#ifndef solaris
int frag;
#endif
int flags;
struct audio_info ai;
if (device == NULL)
device = "/dev/audio";
/* Open the sound device non-blocking to avoid hangs if it is
being used by something else, but then set it blocking
again as that's what we actually want */
if ((soundfd = open(device, O_WRONLY | O_NONBLOCK )) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR, "Couldn't open sound device '%s'",
device );
return 1;
}
if ((flags = fcntl(soundfd, F_GETFL)) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR, "Couldn't fcntl sound device '%s'",
device );
close(soundfd);
return 1;
}
flags &= ~O_NONBLOCK;
if (fcntl(soundfd, F_SETFL, flags) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,
"Couldn't set sound device '%s' blocking",
device );
close(soundfd);
return 1;
}
AUDIO_INITINFO(&ai);
ai.play.encoding = AUDIO_ENCODING_LINEAR;
ai.play.precision = 16;
sixteenbit = 1;
if (settings_current.sound_force_8bit ||
ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
/* try 8-bit */
ai.play.encoding = AUDIO_ENCODING_LINEAR8;
ai.play.precision = 8;
sixteenbit = 0;
if (ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,
"Couldn't set bit size of sound device '%s'",
device );
close(soundfd);
return 1;
}
}
ai.play.channels = *stereoptr ? 2 : 1;
if (ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
/* if it failed make sure the opposite is ok */
ai.play.channels = *stereoptr ? 1 : 2;
if (ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,
"Couldn't set channels of sound device '%s'",
device );
close(soundfd);
return 1;
}
/* FIXME: is this line correct? */
*stereoptr = *stereoptr ? 1 : 2;
}
ai.play.sample_rate = *freqptr;
if (ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,
"Couldn't set sample rate of sound device '%s'",
device );
close(soundfd);
return 1;
}
#ifndef solaris
frag = 0x80000 | BASE_SOUND_FRAG_PWR;
if (*freqptr > 8250)
frag++;
if (*freqptr > 16500)
frag++;
if (*freqptr > 33000)
frag++;
if (*stereoptr)
frag++;
if (sixteenbit)
frag++;
ai.blocksize = 1 << (frag & 0xffff);
ai.hiwat = ((unsigned)frag >> 16) & 0x7fff;
if (ai.hiwat == 0)
ai.hiwat = 65536;
if (ioctl(soundfd, AUDIO_SETINFO, &ai) == -1) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,
"Couldn't set block size of sound device '%s'",
device );
close(soundfd);
return 1;
}
#endif
return 0;
}
void
sound_lowlevel_end( void )
{
#ifdef solaris
ioctl(soundfd, I_FLUSH, FLUSHW);
#else
ioctl(soundfd, AUDIO_FLUSH);
#endif
close(soundfd);
}
void
sound_lowlevel_frame( libspectrum_signed_word *data, int len )
{
static unsigned char buf8[4096];
unsigned char *data8=(unsigned char *)data;
int ret=0, ofs=0;
len <<= 1; /* now in bytes */
if (!sixteenbit) {
libspectrum_signed_word *src;
unsigned char *dst;
int f;
src = data; dst = buf8;
len >>= 1;
for (f=0; f < len; f++)
*dst++ = 128 + (int)((*src++)/256);
data8 = buf8;
}
while (len) {
ret = write (soundfd, data8 + ofs, len);
if (ret > 0) {
ofs += ret;
len -= ret;
}
}
}
#endif /* #if defined AUDIO_SETINFO || defined HAVE_SYS_AUDIOIO_H */
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