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/* acme-volume-oss.c
Copyright (C) 2002, 2003 Bastien Nocera
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Bastien Nocera <hadess@hadess.net>
*/
#include "config.h"
#include "acme-volume-oss.h"
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#ifdef __NetBSD__
#include <sys/param.h>
#include <sys/sysctl.h>
#include <soundcard.h>
#else
#include <sys/soundcard.h>
#endif /* __NetBSD__ */
struct AcmeVolumeOssPrivate
{
gboolean use_pcm;
gboolean mixerpb;
int volume;
int saved_volume;
gboolean pcm_avail;
gboolean mute;
};
static GObjectClass *parent_class = NULL;
static int acme_volume_oss_get_volume (AcmeVolume *self);
static void acme_volume_oss_set_volume (AcmeVolume *self, int val);
static gboolean acme_volume_oss_mixer_check (AcmeVolumeOss *self, int fd);
G_DEFINE_TYPE (AcmeVolumeOss, acme_volume_oss, ACME_TYPE_VOLUME)
static void
acme_volume_oss_finalize (GObject *object)
{
AcmeVolumeOss *self;
g_return_if_fail (object != NULL);
g_return_if_fail (ACME_IS_VOLUME_OSS (object));
self = ACME_VOLUME_OSS (object);
g_return_if_fail (self->_priv != NULL);
g_free (self->_priv);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static int
acme_volume_oss_vol_check (int volume)
{
return CLAMP (volume, 0, 100);
}
static void
acme_volume_oss_set_mute (AcmeVolume *vol, gboolean val)
{
AcmeVolumeOss *self = (AcmeVolumeOss *) vol;
if (self->_priv->mute == FALSE)
{
self->_priv->saved_volume =
acme_volume_oss_get_volume (vol);
acme_volume_oss_set_volume (vol, 0);
self->_priv->mute = TRUE;
} else {
acme_volume_oss_set_volume (vol, self->_priv->saved_volume);
self->_priv->mute = FALSE;
}
}
static gboolean
acme_volume_oss_get_mute (AcmeVolume *vol)
{
AcmeVolumeOss *self = (AcmeVolumeOss *) vol;
/* somebody else might have changed the volume */
if ((self->_priv->mute == TRUE) && (self->_priv->volume != 0))
{
self->_priv->mute = FALSE;
}
return self->_priv->mute;
}
static int
acme_volume_oss_get_volume (AcmeVolume *vol)
{
gint volume, r, l, fd;
AcmeVolumeOss *self = (AcmeVolumeOss *) vol;
fd = open ("/dev/mixer", O_RDONLY);
if (acme_volume_oss_mixer_check(self, fd) == FALSE)
{
volume = 0;
} else {
if (self->_priv->use_pcm && self->_priv->pcm_avail)
ioctl (fd, MIXER_READ (SOUND_MIXER_PCM), &volume);
else
ioctl (fd, MIXER_READ (SOUND_MIXER_VOLUME), &volume);
close (fd);
r = (volume & 0xff);
l = (volume & 0xff00) >> 8;
volume = (r + l) / 2;
volume = acme_volume_oss_vol_check (volume);
}
return volume;
}
static void
acme_volume_oss_set_volume (AcmeVolume *vol, int val)
{
int fd, tvol, volume;
AcmeVolumeOss *self = (AcmeVolumeOss *) vol;
volume = acme_volume_oss_vol_check (val);
fd = open ("/dev/mixer", O_RDONLY);
if (acme_volume_oss_mixer_check (self, fd) == FALSE)
{
return;
} else {
tvol = (volume << 8) + volume;
if (self->_priv->use_pcm && self->_priv->pcm_avail)
ioctl (fd, MIXER_WRITE (SOUND_MIXER_PCM), &tvol);
else
ioctl (fd, MIXER_WRITE (SOUND_MIXER_VOLUME), &tvol);
close (fd);
self->_priv->volume = volume;
}
}
static void
acme_volume_oss_init (AcmeVolumeOss *self)
{
int fd;
self->_priv = g_new0 (AcmeVolumeOssPrivate, 1);
fd = open ("/dev/mixer", O_RDONLY);
if (acme_volume_oss_mixer_check(self, fd) == FALSE)
{
self->_priv->pcm_avail = FALSE;
} else {
int mask = 0;
ioctl (fd, SOUND_MIXER_READ_DEVMASK, &mask);
if (mask & ( 1 << SOUND_MIXER_PCM))
self->_priv->pcm_avail = TRUE;
else
self->_priv->pcm_avail = FALSE;
if (!(mask & ( 1 << SOUND_MIXER_VOLUME)))
self->_priv->use_pcm = TRUE;
close (fd);
}
}
static void
acme_volume_oss_class_init (AcmeVolumeOssClass *klass)
{
AcmeVolumeClass *volume_class = ACME_VOLUME_CLASS (klass);
G_OBJECT_CLASS (klass)->finalize = acme_volume_oss_finalize;
parent_class = g_type_class_peek_parent (klass);
volume_class->set_volume = acme_volume_oss_set_volume;
volume_class->get_volume = acme_volume_oss_get_volume;
volume_class->set_mute = acme_volume_oss_set_mute;
volume_class->get_mute = acme_volume_oss_get_mute;
}
static gboolean
acme_volume_oss_mixer_check (AcmeVolumeOss *self, int fd)
{
gboolean retval;
if (fd <0) {
if (self->_priv->mixerpb == FALSE) {
self->_priv->mixerpb = TRUE;
//FIXME
//volume_oss_fd_problem(self);
}
}
retval = (!self->_priv->mixerpb);
return retval;
}
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