2008-09-13 13:45:47 +02:00
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/* acme-volume-alsa.c
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Copyright (C) 2002, 2003 Bastien Nocera
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The Gnome Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the Gnome Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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Author: Bastien Nocera <hadess@hadess.net>
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*/
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#ifdef HAVE_CONFIG
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#include "config.h"
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#endif
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#include "acme-volume-alsa.h"
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#include <alsa/asoundlib.h>
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#ifndef DEFAULT_CARD
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#define DEFAULT_CARD "default"
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#endif
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#undef LOG
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#ifdef LOG
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#define D(x...) g_message (x)
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#else
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#define D(x...)
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#endif
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#define ROUND(x) ((x - (int)x > 0.5) ? x+1 : x)
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struct AcmeVolumeAlsaPrivate
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{
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long pmin, pmax;
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gboolean has_mute, has_master;
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snd_mixer_t *handle;
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snd_mixer_elem_t *elem;
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int saved_volume;
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guint timer_id;
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};
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static int acme_volume_alsa_get_volume (AcmeVolume *self);
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static void acme_volume_alsa_set_volume (AcmeVolume *self, int val);
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static gboolean acme_volume_alsa_open (AcmeVolumeAlsa *self);
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static void acme_volume_alsa_close (AcmeVolumeAlsa *self);
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static gboolean acme_volume_alsa_close_real (AcmeVolumeAlsa *self);
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G_DEFINE_TYPE (AcmeVolumeAlsa, acme_volume_alsa, ACME_TYPE_VOLUME)
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static void
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acme_volume_alsa_finalize (GObject *object)
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{
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AcmeVolumeAlsa *self;
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self = ACME_VOLUME_ALSA (object);
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if (self->_priv)
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{
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if (self->_priv->timer_id != 0)
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{
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g_source_remove (self->_priv->timer_id);
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self->_priv->timer_id = 0;
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}
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acme_volume_alsa_close_real (self);
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g_free (self->_priv);
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self->_priv = NULL;
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}
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G_OBJECT_CLASS (acme_volume_alsa_parent_class)->finalize (object);
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}
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static void
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acme_volume_alsa_set_mute (AcmeVolume *vol, gboolean val)
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{
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AcmeVolumeAlsa *self = (AcmeVolumeAlsa *) vol;
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if (acme_volume_alsa_open (self) == FALSE)
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return;
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/* If we have a hardware mute */
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if (self->_priv->has_mute)
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{
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snd_mixer_selem_set_playback_switch_all
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(self->_priv->elem, !val);
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acme_volume_alsa_close (self);
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return;
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}
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acme_volume_alsa_close (self);
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/* If we don't */
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if (val == TRUE)
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{
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self->_priv->saved_volume = acme_volume_alsa_get_volume (vol);
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acme_volume_alsa_set_volume (vol, 0);
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} else {
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if (self->_priv->saved_volume != -1)
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acme_volume_alsa_set_volume (vol,
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self->_priv->saved_volume);
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}
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}
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static gboolean
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acme_volume_alsa_get_mute (AcmeVolume *vol)
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{
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AcmeVolumeAlsa *self = (AcmeVolumeAlsa *) vol;
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int ival;
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if (acme_volume_alsa_open (self) == FALSE)
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return FALSE;
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if (self->_priv->has_mute)
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{
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snd_mixer_selem_get_playback_switch(self->_priv->elem,
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SND_MIXER_SCHN_FRONT_LEFT, &ival);
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acme_volume_alsa_close (self);
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return !ival;
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} else {
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acme_volume_alsa_close (self);
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return (acme_volume_alsa_get_volume (vol) == 0);
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}
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}
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static int
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acme_volume_alsa_get_volume (AcmeVolume *vol)
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{
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AcmeVolumeAlsa *self = (AcmeVolumeAlsa *) vol;
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long lval, rval;
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int tmp;
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float alsa_vol;
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if (acme_volume_alsa_open (self) == FALSE)
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return 0;
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snd_mixer_selem_get_playback_volume(self->_priv->elem,
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SND_MIXER_SCHN_FRONT_LEFT, &lval);
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snd_mixer_selem_get_playback_volume(self->_priv->elem,
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SND_MIXER_SCHN_FRONT_RIGHT, &rval);
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acme_volume_alsa_close (self);
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alsa_vol = (lval + rval) / 2;
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alsa_vol = alsa_vol * 100 / (self->_priv->pmax - self->_priv->pmin);
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tmp = ROUND (alsa_vol);
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return tmp;
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}
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static void
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acme_volume_alsa_set_volume (AcmeVolume *vol, int val)
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{
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AcmeVolumeAlsa *self = (AcmeVolumeAlsa *) vol;
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float volume;
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int tmp;
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if (acme_volume_alsa_open (self) == FALSE)
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return;
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volume = (float) val / 100 * (self->_priv->pmax - self->_priv->pmin);
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volume = CLAMP (volume, self->_priv->pmin, self->_priv->pmax);
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tmp = ROUND (volume);
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snd_mixer_selem_set_playback_volume_all (self->_priv->elem, tmp);
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acme_volume_alsa_close (self);
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}
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static int
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acme_volume_alsa_get_threshold (AcmeVolume *vol)
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{
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AcmeVolumeAlsa *self = (AcmeVolumeAlsa *) vol;
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int steps;
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if (acme_volume_alsa_open (self) == FALSE)
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return 1;
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acme_volume_alsa_close (self);
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steps = self->_priv->pmax - self->_priv->pmin;
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return (steps > 0) ? 100 / steps + 1 : 1;
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}
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static gboolean
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acme_volume_alsa_close_real (AcmeVolumeAlsa *self)
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{
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if (self->_priv == NULL)
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return FALSE;
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if (self->_priv->handle != NULL)
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{
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snd_mixer_detach (self->_priv->handle, DEFAULT_CARD);
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snd_mixer_free (self->_priv->handle);
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self->_priv->handle = NULL;
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self->_priv->elem = NULL;
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}
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self->_priv->timer_id = 0;
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return FALSE;
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}
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static gboolean
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acme_volume_alsa_open (AcmeVolumeAlsa *self)
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{
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snd_mixer_selem_id_t *sid;
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snd_mixer_t *handle;
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snd_mixer_elem_t *elem;
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if (self->_priv->timer_id != 0)
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{
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g_source_remove (self->_priv->timer_id);
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self->_priv->timer_id = 0;
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return TRUE;
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}
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/* open the mixer */
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if (snd_mixer_open (&handle, 0) < 0)
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{
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D("snd_mixer_open");
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return FALSE;
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}
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/* attach the handle to the default card */
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if (snd_mixer_attach (handle, DEFAULT_CARD) <0)
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{
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D("snd_mixer_attach");
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goto bail;
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}
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/* ? */
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if (snd_mixer_selem_register (handle, NULL, NULL) < 0)
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{
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D("snd_mixer_selem_register");
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goto bail;
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}
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if (snd_mixer_load (handle) < 0)
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{
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D("snd_mixer_load");
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goto bail;
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}
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snd_mixer_selem_id_alloca (&sid);
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snd_mixer_selem_id_set_name (sid, "Master");
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elem = snd_mixer_find_selem (handle, sid);
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if (!elem)
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{
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snd_mixer_selem_id_alloca (&sid);
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snd_mixer_selem_id_set_name (sid, "PCM");
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elem = snd_mixer_find_selem (handle, sid);
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if (!elem)
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{
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D("snd_mixer_find_selem");
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goto bail;
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}
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}
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if (!snd_mixer_selem_has_playback_volume (elem))
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{
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D("snd_mixer_selem_has_playback_volume");
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goto bail;
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}
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snd_mixer_selem_get_playback_volume_range (elem,
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&(self->_priv->pmin),
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&(self->_priv->pmax));
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self->_priv->has_mute = snd_mixer_selem_has_playback_switch (elem);
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self->_priv->handle = handle;
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self->_priv->elem = elem;
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return TRUE;
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bail:
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acme_volume_alsa_close_real (self);
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return FALSE;
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}
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static void
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acme_volume_alsa_close (AcmeVolumeAlsa *self)
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{
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2008-12-06 22:29:39 +01:00
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self->_priv->timer_id = g_timeout_add_seconds (4,
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2008-09-13 13:45:47 +02:00
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(GSourceFunc) acme_volume_alsa_close_real, self);
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}
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static void
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acme_volume_alsa_init (AcmeVolumeAlsa *self)
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{
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self->_priv = g_new0 (AcmeVolumeAlsaPrivate, 1);
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}
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static void
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acme_volume_alsa_class_init (AcmeVolumeAlsaClass *klass)
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{
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AcmeVolumeClass *volume_class = ACME_VOLUME_CLASS (klass);
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G_OBJECT_CLASS (klass)->finalize = acme_volume_alsa_finalize;
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volume_class->set_volume = acme_volume_alsa_set_volume;
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volume_class->get_volume = acme_volume_alsa_get_volume;
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volume_class->set_mute = acme_volume_alsa_set_mute;
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volume_class->get_mute = acme_volume_alsa_get_mute;
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volume_class->get_threshold = acme_volume_alsa_get_threshold;
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}
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