gstreamer/ext/alsa/gstalsamixertrack.c
Tim-Philipp Müller a03727fb1b ext/alsa/gstalsamixertrack.c: Some const-ification.
Original commit message from CVS:
* ext/alsa/gstalsamixertrack.c: (gst_alsa_mixer_track_new):
Some const-ification.
2006-07-04 16:50:21 +00:00

163 lines
4.5 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 <gst/gst-i18n-plugin.h>
#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)
{
parent_class = g_type_class_peek_parent (g_class);
}
static void
gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track)
{
}
GstMixerTrack *
gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
gint num, gint track_num, gint channels, gint flags, gint alsa_flags)
{
gint i;
long min = 0, max = 0;
const struct
{
const gchar orig[12];
const gchar trans[12];
} alsa_track_labels[] = {
{
"Master", N_("Master")}, {
"Bass", N_("Bass")}, {
"Treble", N_("Treble")}, {
"PCM", N_("PCM")}, {
"Synth", N_("Synth")}, {
"Line", N_("Line-in")}, {
"CD", N_("CD")}, {
"Mic", N_("Microphone")}, {
"PC Speaker", N_("PC Speaker")}, {
"Playback", N_("Playback")}, {
"Capture", N_("Capture")}
};
GstMixerTrack *track = g_object_new (GST_ALSA_MIXER_TRACK_TYPE, NULL);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
/* set basic information */
if (num == 0)
track->label = g_strdup (snd_mixer_selem_get_name (element));
else
track->label = g_strdup_printf ("%s %d",
snd_mixer_selem_get_name (element), num + 1);
for (i = 0; i < G_N_ELEMENTS (alsa_track_labels); ++i) {
if (!g_utf8_collate (snd_mixer_selem_get_name (element),
alsa_track_labels[i].orig)) {
g_free (track->label);
if (num == 0)
track->label = g_strdup (_(alsa_track_labels[i].trans));
else
track->label = g_strdup_printf ("%s %d",
_(alsa_track_labels[i].trans), num);
break;
}
}
track->num_channels = channels;
track->flags = flags;
alsa_track->element = element;
alsa_track->alsa_flags = alsa_flags;
alsa_track->track_num = track_num;
/* set volume information */
if (channels) {
if (alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
snd_mixer_selem_get_playback_volume_range (element, &min, &max);
} else if (alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_get_capture_volume_range (element, &min, &max);
}
}
track->min_volume = (gint) min;
track->max_volume = (gint) max;
for (i = 0; i < channels; i++) {
long tmp = 0;
if (alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
snd_mixer_selem_get_playback_volume (element, i, &tmp);
} else if (alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_get_capture_volume (element, i, &tmp);
}
alsa_track->volumes[i] = (gint) tmp;
}
if (snd_mixer_selem_has_playback_switch (element)) {
int val = 1;
snd_mixer_selem_get_playback_switch (element, 0, &val);
if (!val)
track->flags |= GST_MIXER_TRACK_MUTE;
}
if (flags & GST_MIXER_TRACK_INPUT) {
int val = 0;
snd_mixer_selem_get_capture_switch (element, 0, &val);
if (val)
track->flags |= GST_MIXER_TRACK_RECORD;
}
return track;
}