mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 08:46:40 +00:00
130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/* 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_dispose (GObject * object);
|
|
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)
|
|
{
|
|
GObjectClass *object_class = (GObjectClass *) g_class;
|
|
|
|
if (parent_class == NULL)
|
|
parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
|
|
|
|
object_class->dispose = gst_alsa_mixer_track_dispose;
|
|
}
|
|
|
|
static void
|
|
gst_alsa_mixer_track_init (GstAlsaMixerTrack *alsa_track)
|
|
{ }
|
|
|
|
static void
|
|
gst_alsa_mixer_track_dispose (GObject *object)
|
|
{
|
|
if (object != NULL)
|
|
gst_alsa_mixer_track_free (GST_ALSA_MIXER_TRACK (object));
|
|
}
|
|
|
|
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 = (GstMixerTrack *) g_new (GstAlsaMixerTrack, 1);
|
|
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;
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_track_free (GstAlsaMixerTrack *alsa_track)
|
|
{
|
|
if (alsa_track != NULL) {
|
|
g_free (GST_MIXER_TRACK (alsa_track)->label);
|
|
g_free (alsa_track);
|
|
}
|
|
}
|
|
|
|
|