mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2026-01-07 12:20:39 -08:00
Code Issues Projects Releases Wiki Activity

(vox_configure): Change order of ioctls. Don't

Browse source 
set SNDCTL_DSP_SPEED from bps, don't set SNDCTL_DSP_SAMPLESIZE.
Ignore errors when changing volume.
(vox_close): Don't reset the device.
This commit is contained in:
Gerd Moellmann 2000-12-07 22:09:00 +00:00
parent 926b7e5e3e
commit 28fcb7dc39
2 changed files with 25 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

5
src/ChangeLog
View file

@ -9,6 +9,11 @@
2000-12-07 Gerd Moellmann <gerd@gnu.org>
* sound.c (vox_configure): Change order of ioctls. Don't
set SNDCTL_DSP_SPEED from bps, don't set SNDCTL_DSP_SAMPLESIZE.
Ignore errors when changing volume.
(vox_close): Don't reset the device.
* process.c (read_process_output): Make sure the process marker's
position is valid when the process buffer is changed in
after-change functions. W3 does that.

46
src/sound.c
View file

@ -760,41 +760,36 @@ static void
vox_configure (sd)
struct sound_device *sd;
{
int requested;
int val;
xassert (sd->fd >= 0);
/* Device parameters apparently depend on each other in undocumented
ways (not to imply that there is any real documentation). Be
careful when reordering the calls below. */
if (sd->sample_size > 0
&& ioctl (sd->fd, SNDCTL_DSP_SAMPLESIZE, &sd->sample_size) < 0)
sound_perror ("Setting sample size");
if (sd->bps > 0
&& ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->bps) < 0)
sound_perror ("Setting speed");
val = sd->format;
if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0
|| val != sd->format)
sound_perror ("Set sound format");
if (sd->sample_rate > 0
&& ioctl (sd->fd, SOUND_PCM_WRITE_RATE, &sd->sample_rate) < 0)
sound_perror ("Setting sample rate");
val = sd->channels != 1;
if (ioctl (sd->fd, SNDCTL_DSP_STEREO, &val) < 0
|| val != (sd->channels != 1))
sound_perror ("Set stereo/mono");
requested = sd->format;
if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0)
sound_perror ("Setting format");
else if (requested != sd->format)
error ("Setting format");
if (sd->channels > 1
&& ioctl (sd->fd, SNDCTL_DSP_STEREO, &sd->channels) < 0)
sound_perror ("Setting channels");
/* 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
|| val != sd->sample_rate)
sound_perror ("Set sound speed");
}
if (sd->volume > 0)
{
int volume = sd->volume & 0xff;
volume |= volume << 8;
if (ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume) < 0)
sound_perror ("Setting volume");
/* This may fail if there is no mixer. Ignore the failure. */
ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume);
}
}
@ -809,7 +804,6 @@ vox_close (sd)
{
/* Flush sound data, and reset the device. */
ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL);
ioctl (sd->fd, SNDCTL_DSP_RESET, NULL);
/* Close the device. */
emacs_close (sd->fd);