static gint oss_input_select_format(Dataformat *format, gboolean silent,
GVoidFunc ready_func)
{
return oss_try_format(format,TRUE,silent);
}
static gboolean
oss_open (void *dp)
{
oss_driver * const d = dp;
int mf;
int i;
audio_buf_info info;
/* O_NONBLOCK is required for the es1370 driver in Linux
2.2.9, for example. It's open() behaviour is not
OSS-conformant (though Thomas Sailer says it's okay). */
if((d->soundfd = open(d->p_devdsp, O_WRONLY | O_NONBLOCK)) < 0) {
char buf[256];
g_sprintf(buf, _("Couldn't open %s for sound output:\n%s"), d->p_devdsp, strerror(errno));
error_error(buf);
goto out;
}
// Clear O_NONBLOCK again
fcntl(d->soundfd, F_SETFL, 0);
d->bits = 0;
mf = 0;
if(d->p_resolution == 16) {
if(oss_try_format(d, AFMT_S16_LE)) {
d->bits = 16;
mf = ST_MIXER_FORMAT_S16_LE;
} else if(oss_try_format(d, AFMT_S16_BE)) {
d->bits = 16;
mf = ST_MIXER_FORMAT_S16_BE;
} else if(oss_try_format(d, AFMT_U16_LE)) {
d->bits = 16;
mf = ST_MIXER_FORMAT_U16_LE;
} else if(oss_try_format(d, AFMT_U16_BE)) {
d->bits = 16;
mf = ST_MIXER_FORMAT_U16_BE;
}
}
if(d->bits != 16) {
if(oss_try_format(d, AFMT_S8)) {
d->bits = 8;
mf = ST_MIXER_FORMAT_S8;
} else if(oss_try_format(d, AFMT_U8)) {
d->bits = 8;
mf = ST_MIXER_FORMAT_U8;
} else {
error_error(_("Required sound output format not supported.\n"));
goto out;
}
}
if(d->p_channels == 2 && oss_try_stereo(d, 1)) {
d->stereo = 1;
mf |= ST_MIXER_FORMAT_STEREO;
} else if(oss_try_stereo(d, 0)) {
d->stereo = 0;
}
d->mf = mf;
d->playrate = d->p_mixfreq;
ioctl(d->soundfd, SNDCTL_DSP_SPEED, &d->playrate);
i = 0x00020000 + d->p_fragsize + d->stereo + (d->bits / 8 - 1);
ioctl(d->soundfd, SNDCTL_DSP_SETFRAGMENT, &i);
// Find out how many fragments OSS actually uses and how large they are.
ioctl(d->soundfd, SNDCTL_DSP_GETOSPACE, &info);
d->fragsize = info.fragsize;
d->numfrags = info.fragstotal;
ioctl(d->soundfd, SNDCTL_DSP_GETCAPS, &i);
d->realtimecaps = i & DSP_CAP_REALTIME;
d->sndbuf = calloc(1, d->fragsize);
if(d->stereo == 1) {
d->fragsize /= 2;
}
if(d->bits == 16) {
d->fragsize /= 2;
}
d->polltag = audio_poll_add(d->soundfd, GDK_INPUT_WRITE, oss_poll_ready_playing, d);
d->firstpoll = TRUE;
d->playtime = 0;
return TRUE;
out:
oss_release(dp);
return FALSE;
}
