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