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/* hpsound.c: HP-UX sound I/O
Copyright (c) 2002-2004 Alexander Yurchenko, Russell Marks, Philip Kendall
Matan Ziv-Av, Stuart Brady
$Id: hpsound.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>
#ifdef AUDIO_FORMAT_LINEAR16BIT
#include <sys/types.h>
#include <sys/audio.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include "settings.h"
#include "sound.h"
#include "ui/ui.h"
static int soundfd = -1;
static int sixteenbit = 1;
int sound_lowlevel_init( const char *device, int *freqptr, int *stereoptr )
{
int flags, tmp, frag;
/* select a default device if we weren't explicitly given one */
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;
}
tmp = AUDIO_FORMAT_LINEAR16BIT;
if( settings_current.sound_force_8bit ||
ioctl( soundfd, AUDIO_SET_DATA_FORMAT, tmp ) < 0 ) {
/* try 8-bit - may be an 8-bit only device */
tmp = AUDIO_FORMAT_LINEAR8BIT;
if( ioctl( soundfd, AUDIO_SET_DATA_FORMAT, tmp ) < 0 ) {
settings_current.sound = 0;
if( settings_current.sound_force_8bit ) {
ui_error( UI_ERROR_ERROR,
"Couldn't set sound device '%s' into 8-bit mode", device );
} else {
ui_error(
UI_ERROR_ERROR,
"Couldn't set sound device '%s' in either 16-bit or 8-bit mode",
device
);
}
close( soundfd );
return 1;
}
sixteenbit = 0;
}
tmp = ( *stereoptr ) ? 2 : 1;
if( ioctl( soundfd, AUDIO_SET_CHANNELS, tmp ) < 0 ) {
tmp = ( *stereoptr ) ? 1 : 2;
if( ioctl( soundfd, AUDIO_SET_CHANNELS, tmp ) < 0 ) {
settings_current.sound = 0;
ui_error(
UI_ERROR_ERROR,
"Couldn't set sound device '%s' into either mono or stereo mode",
device
);
close( soundfd );
return 1;
}
*stereoptr = tmp;
}
if( ioctl( soundfd, AUDIO_SET_SAMPLE_RATE, *freqptr ) < 0 ) {
settings_current.sound = 0;
ui_error( UI_ERROR_ERROR,"Couldn't set sound device '%s' speed to %d",
device, *freqptr );
close( soundfd );
return 1;
}
frag = 16384;
ioctl( soundfd, AUDIO_SET_FRAGMENT, frag );
return 0;
}
void
sound_lowlevel_end( void )
{
if( soundfd != -1 ) 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;
/* TODO: confirm byteorder on IA64 */
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 /* #ifdef AUDIO_FORMAT_LINEAR16BIT */
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