gst-libs/gst/interfaces/cameracontrolchannel.c

   1 /* GStreamer Camera Control Channel Interface
   2  *
   3  * Copyright (c) 2000 - 2012 Samsung Electronics Co., Ltd.
   4  *
   5  * Contact: Jeongmo Yang <jm80.yang@samsung.com>
   6  *
   7  * cameracontrolchannel.c: cameracontrol channel object design
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Library General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Library General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Library General Public
  20  * License along with this library; if not, write to the
  21  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22  * Boston, MA 02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include "cameracontrolchannel.h"
  30
  31 enum {
  32         /* FILL ME */
  33         SIGNAL_VALUE_CHANGED,
  34         LAST_SIGNAL
  35 };
  36
  37 static void gst_camera_control_channel_class_init(GstCameraControlChannelClass* klass);
  38 static void gst_camera_control_channel_init(GstCameraControlChannel* control_channel);
  39 static void gst_camera_control_channel_dispose(GObject* object);
  40
  41 static GObjectClass *parent_class = NULL;
  42 static guint signals[LAST_SIGNAL] = { 0 };
  43
  44 GType gst_camera_control_channel_get_type(void)
  45 {
  46         static GType gst_camera_control_channel_type = 0;
  47
  48         if (!gst_camera_control_channel_type) {
  49                 static const GTypeInfo camera_control_channel_info = {
  50                         sizeof (GstCameraControlChannelClass),
  51                         NULL,
  52                         NULL,
  53                         (GClassInitFunc) gst_camera_control_channel_class_init,
  54                         NULL,
  55                         NULL,
  56                         sizeof (GstCameraControlChannel),
  57                         0,
  58                         (GInstanceInitFunc) gst_camera_control_channel_init,
  59                         NULL
  60                 };
  61
  62                 gst_camera_control_channel_type = \
  63                         g_type_register_static(G_TYPE_OBJECT,
  64                                                "GstCameraControlChannel",
  65                                                &camera_control_channel_info,
  66                                                0);
  67         }
  68
  69         return gst_camera_control_channel_type;
  70 }
  71
  72 static void gst_camera_control_channel_class_init(GstCameraControlChannelClass* klass)
  73 {
  74         GObjectClass *object_klass = (GObjectClass*) klass;
  75
  76         parent_class = g_type_class_peek_parent (klass);
  77
  78         signals[SIGNAL_VALUE_CHANGED] = \
  79                 g_signal_new("control-value-changed",
  80                              G_TYPE_FROM_CLASS (klass),
  81                              G_SIGNAL_RUN_LAST,
  82                              G_STRUCT_OFFSET (GstCameraControlChannelClass, value_changed),
  83                              NULL,
  84                              NULL,
  85                              g_cclosure_marshal_VOID__INT,
  86                              G_TYPE_NONE,
  87                              1,
  88                              G_TYPE_INT);
  89
  90         object_klass->dispose = gst_camera_control_channel_dispose;
  91 }
  92
  93 static void gst_camera_control_channel_init(GstCameraControlChannel* control_channel)
  94 {
  95         control_channel->label = NULL;
  96         control_channel->min_value = control_channel->max_value = 0;
  97 }
  98
  99 static void gst_camera_control_channel_dispose(GObject* object)
 100 {
 101         GstCameraControlChannel *control_channel = GST_CAMERA_CONTROL_CHANNEL(object);
 102
 103         if (control_channel->label) {
 104                 g_free (control_channel->label);
 105         }
 106
 107         control_channel->label = NULL;
 108
 109         if (parent_class->dispose) {
 110                 parent_class->dispose (object);
 111         }
 112 }