git.maemo.org Git - mafwsubrenderer/blob - gst-plugins-base-subtitles0.10/gst-libs/gst/interfaces/colorbalancechannel.c

   1 /* GStreamer Color Balance
   2  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
   3  *
   4  * colorbalancechannel.c: colorbalance 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 "colorbalancechannel.h"
  27
  28 /**
  29  * SECTION:gstcolorbalancechannel
  30  * @short_description: Object representing a channel from the #GstColorBalance
  31  *         interface.
  32  *
  33  * <refsect2><para>The #GstColorBalanceChannel object represents a parameter
  34  * for modifying the color balance implemented by an element providing the
  35  * #GstColorBalance interface. For example, Hue or Saturation.
  36  * </para></refsect2>
  37  */
  38
  39 enum
  40 {
  41   /* FILL ME */
  42   SIGNAL_VALUE_CHANGED,
  43   LAST_SIGNAL
  44 };
  45
  46 static void gst_color_balance_channel_class_init (GstColorBalanceChannelClass *
  47     klass);
  48 static void gst_color_balance_channel_init (GstColorBalanceChannel * balance);
  49 static void gst_color_balance_channel_dispose (GObject * object);
  50
  51 static GObjectClass *parent_class = NULL;
  52 static guint signals[LAST_SIGNAL] = { 0 };
  53
  54 GType
  55 gst_color_balance_channel_get_type (void)
  56 {
  57   static GType gst_color_balance_channel_type = 0;
  58
  59   if (!gst_color_balance_channel_type) {
  60     static const GTypeInfo color_balance_channel_info = {
  61       sizeof (GstColorBalanceChannelClass),
  62       NULL,
  63       NULL,
  64       (GClassInitFunc) gst_color_balance_channel_class_init,
  65       NULL,
  66       NULL,
  67       sizeof (GstColorBalanceChannel),
  68       0,
  69       (GInstanceInitFunc) gst_color_balance_channel_init,
  70       NULL
  71     };
  72
  73     gst_color_balance_channel_type =
  74         g_type_register_static (G_TYPE_OBJECT,
  75         "GstColorBalanceChannel", &color_balance_channel_info, 0);
  76   }
  77
  78   return gst_color_balance_channel_type;
  79 }
  80
  81 static void
  82 gst_color_balance_channel_class_init (GstColorBalanceChannelClass * klass)
  83 {
  84   GObjectClass *object_klass = (GObjectClass *) klass;
  85
  86   parent_class = g_type_class_peek_parent (klass);
  87
  88   /**
  89    * GstColorBalanceChannel::value-changed:
  90    * @channel: The #GstColorBalanceChannel
  91    * @value: The new value
  92    *
  93    * Fired when the value of the indicated channel has changed.
  94    */
  95   signals[SIGNAL_VALUE_CHANGED] =
  96       g_signal_new ("value-changed", G_TYPE_FROM_CLASS (klass),
  97       G_SIGNAL_RUN_LAST,
  98       G_STRUCT_OFFSET (GstColorBalanceChannelClass,
  99           value_changed),
 100       NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
 101
 102   object_klass->dispose = gst_color_balance_channel_dispose;
 103 }
 104
 105 static void
 106 gst_color_balance_channel_init (GstColorBalanceChannel * channel)
 107 {
 108   channel->label = NULL;
 109   channel->min_value = channel->max_value = 0;
 110 }
 111
 112 static void
 113 gst_color_balance_channel_dispose (GObject * object)
 114 {
 115   GstColorBalanceChannel *channel = GST_COLOR_BALANCE_CHANNEL (object);
 116
 117   if (channel->label)
 118     g_free (channel->label);
 119
 120   channel->label = NULL;
 121
 122   if (parent_class->dispose)
 123     parent_class->dispose (object);
 124 }