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#include "config.h"
#ifdef HAVE_MACHINE_SOUNDCARD_H
# include <machine/soundcard.h>
#else
# ifdef HAVE_SOUNDCARD_H
# include <soundcard.h>
# else
# include <sys/soundcard.h>
# endif
#endif
#include <errno.h>
/* FreeBSD uses a different identifier? what other BSDs? */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#define SNDCTL_DSP_SETDUPLEX DSP_CAP_DUPLEX
#endif
#define ARCH_esd_audio_devices
const char *esd_audio_devices()
{
return "/dev/dsp, /dev/dsp2, etc.";
}
#define NFRAGS 32
#define ARCH_esd_audio_open
int esd_audio_open()
{
const char *device;
int afd = -1, value = 0, test = 0;
int mode = O_WRONLY;
int rate;
int fragsize;
int frag;
struct timeval tv;
fd_set set;
rate = esd_audio_rate *
( ( ( esd_audio_format & ESD_MASK_CHAN) == ESD_STEREO ) ? 2 : 1 ) *
( ( ( esd_audio_format & ESD_MASK_BITS) == ESD_BITS16 ) ? 2 : 1 );
for ( fragsize = 0; 1L << fragsize < rate / 25; fragsize++ )
;
fragsize--;
frag = (NFRAGS << 16) | fragsize;
/* if recording, set for full duplex mode */
if ( (esd_audio_format & ESD_MASK_FUNC) == ESD_RECORD )
mode = O_RDWR;
mode |= O_NONBLOCK;
/* open the sound device */
device = esd_audio_device ? esd_audio_device : "/dev/dsp";
if ((afd = open(device, mode, 0)) == -1)
{ /* Opening device failed */
if (errno != ENOENT)
perror(device);
return( -2 );
}
mode = fcntl(afd, F_GETFL);
mode &= ~O_NONBLOCK;
fcntl(afd, F_SETFL, mode);
#if defined(SNDCTL_DSP_SETFRAGMENT)
ioctl(afd, SNDCTL_DSP_SETFRAGMENT, &frag);
#endif
/* TODO: check that this is allowable */
/* set for full duplex operation, if recording */
#if defined(SNDCTL_DSP_SETDUPLEX)
if ( (esd_audio_format & ESD_MASK_FUNC) == ESD_RECORD ) {
ioctl( afd, SNDCTL_DSP_SETDUPLEX, 0 );
}
#endif
/* set the sound driver audio format for playback */
value = test = ( (esd_audio_format & ESD_MASK_BITS) == ESD_BITS16 )
? /* 16 bit */ AFMT_S16_NE : /* 8 bit */ AFMT_U8;
if (ioctl(afd, SNDCTL_DSP_SETFMT, &test) == -1)
{ /* Fatal error */
perror("SNDCTL_DSP_SETFMT");
close( afd );
esd_audio_fd = -1;
return( -1 );
}
ioctl(afd, SNDCTL_DSP_GETFMTS, &test);
if ( !(value & test) ) /* TODO: should this be if ( value XOR test ) ??? */
{ /* The device doesn't support the requested audio format. */
fprintf( stderr, "unsupported sound format: %d\n", esd_audio_format );
close( afd );
esd_audio_fd = -1;
return( -1 );
}
/* set the sound driver number of channels for playback */
value = test = ( ( ( esd_audio_format & ESD_MASK_CHAN) == ESD_STEREO )
? /* stereo */ 1 : /* mono */ 0 );
if (ioctl(afd, SNDCTL_DSP_STEREO, &test) == -1)
{ /* Fatal error */
perror( "SNDCTL_DSP_STEREO" );
close( afd );
esd_audio_fd = -1;
return( -1 );
}
/* set the sound driver number playback rate */
test = esd_audio_rate;
if ( ioctl(afd, SNDCTL_DSP_SPEED, &test) == -1)
{ /* Fatal error */
perror("SNDCTL_DSP_SPEED");
close( afd );
esd_audio_fd = -1;
return( -1 );
}
/* see if actual speed is within 5% of requested speed */
if( fabs( test - esd_audio_rate ) > esd_audio_rate * 0.05 )
{
fprintf( stderr, "unsupported playback rate: %d\n", esd_audio_rate );
close( afd );
esd_audio_fd = -1;
return( -1 );
}
if ( ioctl(afd, SNDCTL_DSP_GETBLKSIZE, &test) == -1)
{ /* Fatal error */
perror("SNDCTL_DSP_GETBLKSIZE");
close( afd );
esd_audio_fd = -1;
return( -1 );
}
esd_write_size = test > ESD_MAX_WRITE_SIZE ? ESD_MAX_WRITE_SIZE : test;
/* value = test = buf_size; */
esd_audio_fd = afd;
/*
* From XMMS:
* Stupid hack to find out if the driver supports select; some
* drivers won't work properly without a select and some won't
* work with a select :/
*/
tv.tv_sec = 0;
tv.tv_usec = 10;
FD_ZERO(&set);
FD_SET(afd, &set);
test = select(afd + 1, NULL, &set, NULL, &tv);
if (test > 0)
select_works = 1;
return afd;
}
#define ARCH_esd_audio_pause
void esd_audio_pause()
{
/* per oss specs */
ioctl( esd_audio_fd, SNDCTL_DSP_POST, 0 );
return;
}
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