static void
vox_close (struct sound_device *sd)
{
if (sd->fd >= 0)
{
/* On GNU/Linux, it seems that the device driver doesn't like to
be interrupted by a signal. Block the ones we know to cause
troubles. */
#ifdef SIGIO
sigblock (sigmask (SIGIO));
#endif
turn_on_atimers (0);
/* Flush sound data, and reset the device. */
ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL);
turn_on_atimers (1);
#ifdef SIGIO
sigunblock (sigmask (SIGIO));
#endif
/* Close the device. */
emacs_close (sd->fd);
sd->fd = -1;
}
}
static void
vox_close (struct sound_device *sd)
{
if (sd->fd >= 0)
{
/* On GNU/Linux, it seems that the device driver doesn't like to
be interrupted by a signal. Block the ones we know to cause
troubles. */
#ifdef USABLE_SIGIO
sigset_t blocked, oldset;
sigemptyset (&blocked);
sigaddset (&blocked, SIGIO);
pthread_sigmask (SIG_BLOCK, &blocked, &oldset);
#endif
turn_on_atimers (0);
/* Flush sound data, and reset the device. */
ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL);
turn_on_atimers (1);
#ifdef USABLE_SIGIO
pthread_sigmask (SIG_SETMASK, &oldset, 0);
#endif
/* Close the device. */
emacs_close (sd->fd);
sd->fd = -1;
}
}
static void
vox_configure (struct sound_device *sd)
{
int val;
#ifdef USABLE_SIGIO
sigset_t oldset, blocked;
#endif
eassert (sd->fd >= 0);
/* On GNU/Linux, it seems that the device driver doesn't like to be
interrupted by a signal. Block the ones we know to cause
troubles. */
turn_on_atimers (0);
#ifdef USABLE_SIGIO
sigemptyset (&blocked);
sigaddset (&blocked, SIGIO);
pthread_sigmask (SIG_BLOCK, &blocked, &oldset);
#endif
val = sd->format;
if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0
|| val != sd->format)
sound_perror ("Could not set sound format");
val = sd->channels != 1;
if (ioctl (sd->fd, SNDCTL_DSP_STEREO, &val) < 0
|| val != (sd->channels != 1))
sound_perror ("Could not set stereo/mono");
/* I think bps and sampling_rate are the same, but who knows.
Check this. and use SND_DSP_SPEED for both. */
if (sd->sample_rate > 0)
{
val = sd->sample_rate;
if (ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->sample_rate) < 0)
sound_perror ("Could not set sound speed");
else if (val != sd->sample_rate)
sound_warning ("Could not set sample rate");
}
if (sd->volume > 0)
{
int volume = sd->volume & 0xff;
volume |= volume << 8;
/* This may fail if there is no mixer. Ignore the failure. */
ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume);
}
turn_on_atimers (1);
#ifdef USABLE_SIGIO
pthread_sigmask (SIG_SETMASK, &oldset, 0);
#endif
}
static void
sound_perror (const char *msg)
{
int saved_errno = errno;
turn_on_atimers (1);
#ifdef SIGIO
sigunblock (sigmask (SIGIO));
#endif
if (saved_errno != 0)
error ("%s: %s", msg, strerror (saved_errno));
else
error ("%s", msg);
}
static _Noreturn void
sound_perror (const char *msg)
{
int saved_errno = errno;
turn_on_atimers (1);
#ifdef USABLE_SIGIO
{
sigset_t unblocked;
sigemptyset (&unblocked);
sigaddset (&unblocked, SIGIO);
pthread_sigmask (SIG_UNBLOCK, &unblocked, 0);
}
#endif
if (saved_errno != 0)
error ("%s: %s", msg, strerror (saved_errno));
else
error ("%s", msg);
}