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/* ALSA mixer track implementation.
* Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
*
* This 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.
*
* This 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 this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstalsamixertrack.h"
static void gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track);
static void gst_alsa_mixer_track_class_init (gpointer g_class,
gpointer class_data);
static GstMixerTrackClass *parent_class = NULL;
GType
gst_alsa_mixer_track_get_type (void)
{
static GType track_type = 0;
if (!track_type) {
static const GTypeInfo track_info = {
sizeof (GstAlsaMixerTrackClass),
NULL,
NULL,
gst_alsa_mixer_track_class_init,
NULL,
NULL,
sizeof (GstAlsaMixerTrack),
0,
(GInstanceInitFunc) gst_alsa_mixer_track_init,
};
track_type =
g_type_register_static (GST_TYPE_MIXER_TRACK, "GstAlsaMixerTrack",
&track_info, 0);
}
return track_type;
}
static void
gst_alsa_mixer_track_class_init (gpointer g_class, gpointer class_data)
{
if (parent_class == NULL)
parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
}
static void
gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track)
{
}
GstMixerTrack *
gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
gint track_num, gint channels, gint flags)
{
gint i;
long min, max;
GstMixerTrack *track = g_object_new (GST_ALSA_MIXER_TRACK_TYPE, NULL);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
/* set basic information */
track->label = g_strdup_printf ("%s", snd_mixer_selem_get_name (element));
track->num_channels = channels;
track->flags = flags;
alsa_track->element = element;
alsa_track->track_num = track_num;
/* set volume information */
snd_mixer_selem_get_playback_volume_range (element, &min, &max);
track->min_volume = (gint) min;
track->max_volume = (gint) max;
snd_mixer_selem_get_capture_volume_range (element, &min, &max);
alsa_track->min_rec_volume = (gint) min;
alsa_track->max_rec_volume = (gint) max;
for (i = 0; i < channels; i++) {
long tmp;
if (snd_mixer_selem_has_playback_channel (element, i)) {
snd_mixer_selem_get_playback_volume (element, i, &tmp);
alsa_track->volumes[i] = (gint) tmp;
} else if (snd_mixer_selem_has_capture_channel (element, i)) {
snd_mixer_selem_get_capture_volume (element, i, &tmp);
alsa_track->volumes[i] = (gint) tmp;
}
}
return track;
}
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