1 /* ALSA mixer object implementation.

     2  * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public

    15  * License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 #ifdef HAVE_CONFIG_H

    21 #include "config.h"

    22 #endif

    23 

    24 #include "gstalsamixeroptions.h"

    25 

    26 static void gst_alsa_mixer_options_init (GstAlsaMixerOptions * alsa_opts);

    27 static void gst_alsa_mixer_options_class_init (gpointer g_class,

    28     gpointer class_data);

    29 

    30 static GstMixerOptionsClass *parent_class = NULL;

    31 

    32 GType

    33 gst_alsa_mixer_options_get_type (void)

    34 {

    35   static GType opts_type = 0;

    36 

    37   if (!opts_type) {

    38     static const GTypeInfo opts_info = {

    39       sizeof (GstAlsaMixerOptionsClass),

    40       NULL,

    41       NULL,

    42       gst_alsa_mixer_options_class_init,

    43       NULL,

    44       NULL,

    45       sizeof (GstAlsaMixerOptions),

    46       0,

    47       (GInstanceInitFunc) gst_alsa_mixer_options_init,

    48     };

    49 

    50     opts_type =

    51         g_type_register_static (GST_TYPE_MIXER_OPTIONS, "GstAlsaMixerOptions",

    52         &opts_info, 0);

    53   }

    54 

    55   return opts_type;

    56 }

    57 

    58 static void

    59 gst_alsa_mixer_options_class_init (gpointer g_class, gpointer class_data)

    60 {

    61   parent_class = g_type_class_peek_parent (g_class);

    62 }

    63 

    64 static void

    65 gst_alsa_mixer_options_init (GstAlsaMixerOptions * alsa_opts)

    66 {

    67 }

    68 

    69 GstMixerOptions *

    70 gst_alsa_mixer_options_new (snd_mixer_elem_t * element, gint track_num)

    71 {

    72   GstMixerOptions *opts;

    73   GstAlsaMixerOptions *alsa_opts;

    74   GstMixerTrack *track;

    75   const gchar *label;

    76   gint num, i;

    77   gchar str[256];

    78 

    79   label = snd_mixer_selem_get_name (element);

    80 

    81   opts = g_object_new (GST_ALSA_MIXER_OPTIONS_TYPE,

    82       "untranslated-label", label, NULL);

    83   alsa_opts = (GstAlsaMixerOptions *) opts;

    84   track = (GstMixerTrack *) opts;

    85 

    86   /* set basic information */

    87   track->label = g_strdup (label);      /* FIXME: translate this? */

    88   track->num_channels = 0;

    89   track->flags = 0;

    90   alsa_opts->element = element;

    91   alsa_opts->track_num = track_num;

    92 

    93   /* get enumerations for switch/options object */

    94   num = snd_mixer_selem_get_enum_items (element);

    95   for (i = 0; i < num; i++) {

    96     if (snd_mixer_selem_get_enum_item_name (element, i, 255, str) < 0) {

    97       g_object_unref (G_OBJECT (alsa_opts));

    98       return NULL;

    99     }

   100 

   101     opts->values = g_list_append (opts->values, g_strdup (str));

   102   }

   103 

   104   return opts;

   105 }