gst-libs/gst/interfaces/cameracontrolchannel.c

   1 /* GStreamer Camera Control Channel Interface
   2  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   3  *
   4  * cameracontrolchannel.c: cameracontrol channel object design
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "cameracontrolchannel.h"
  27
  28 enum {
  29         /* FILL ME */
  30         SIGNAL_VALUE_CHANGED,
  31         LAST_SIGNAL
  32 };
  33
  34 static void gst_camera_control_channel_class_init(GstCameraControlChannelClass* klass);
  35 static void gst_camera_control_channel_init(GstCameraControlChannel* control_channel);
  36 static void gst_camera_control_channel_dispose(GObject* object);
  37
  38 static GObjectClass *parent_class = NULL;
  39 static guint signals[LAST_SIGNAL] = { 0 };
  40
  41 GType gst_camera_control_channel_get_type(void)
  42 {
  43         static GType gst_camera_control_channel_type = 0;
  44
  45         if (!gst_camera_control_channel_type) {
  46                 static const GTypeInfo camera_control_channel_info = {
  47                         sizeof (GstCameraControlChannelClass),
  48                         NULL,
  49                         NULL,
  50                         (GClassInitFunc) gst_camera_control_channel_class_init,
  51                         NULL,
  52                         NULL,
  53                         sizeof (GstCameraControlChannel),
  54                         0,
  55                         (GInstanceInitFunc) gst_camera_control_channel_init,
  56                         NULL
  57                 };
  58
  59                 gst_camera_control_channel_type = \
  60                         g_type_register_static(G_TYPE_OBJECT,
  61                                                "GstCameraControlChannel",
  62                                                &camera_control_channel_info,
  63                                                0);
  64         }
  65
  66         return gst_camera_control_channel_type;
  67 }
  68
  69 static void gst_camera_control_channel_class_init(GstCameraControlChannelClass* klass)
  70 {
  71         GObjectClass *object_klass = (GObjectClass*) klass;
  72
  73         parent_class = g_type_class_peek_parent (klass);
  74
  75         signals[SIGNAL_VALUE_CHANGED] = \
  76                 g_signal_new("control-value-changed",
  77                              G_TYPE_FROM_CLASS (klass),
  78                              G_SIGNAL_RUN_LAST,
  79                              G_STRUCT_OFFSET (GstCameraControlChannelClass, value_changed),
  80                              NULL,
  81                              NULL,
  82                              g_cclosure_marshal_VOID__INT,
  83                              G_TYPE_NONE,
  84                              1,
  85                              G_TYPE_INT);
  86
  87         object_klass->dispose = gst_camera_control_channel_dispose;
  88 }
  89
  90 static void gst_camera_control_channel_init(GstCameraControlChannel* control_channel)
  91 {
  92         control_channel->label = NULL;
  93         control_channel->min_value = control_channel->max_value = 0;
  94 }
  95
  96 static void gst_camera_control_channel_dispose(GObject* object)
  97 {
  98         GstCameraControlChannel *control_channel = GST_CAMERA_CONTROL_CHANNEL(object);
  99
 100         if (control_channel->label) {
 101                 g_free (control_channel->label);
 102         }
 103
 104         control_channel->label = NULL;
 105
 106         if (parent_class->dispose) {
 107                 parent_class->dispose (object);
 108         }
 109 }