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/* GStreamer Color Balance
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* colorbalance.c: image color balance interface design
* virtual class function wrappers
*
* 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 "colorbalance.h"
#include "colorbalance-marshal.h"
enum {
VALUE_CHANGED,
LAST_SIGNAL
};
static void gst_color_balance_class_init (GstColorBalanceClass *klass);
static guint gst_color_balance_signals[LAST_SIGNAL] = { 0 };
GType
gst_color_balance_get_type (void)
{
static GType gst_color_balance_type = 0;
if (!gst_color_balance_type) {
static const GTypeInfo gst_color_balance_info = {
sizeof (GstColorBalanceClass),
(GBaseInitFunc) gst_color_balance_class_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_color_balance_type = g_type_register_static (G_TYPE_INTERFACE,
"GstColorBalance",
&gst_color_balance_info, 0);
g_type_interface_add_prerequisite (gst_color_balance_type,
GST_TYPE_IMPLEMENTS_INTERFACE);
}
return gst_color_balance_type;
}
static void
gst_color_balance_class_init (GstColorBalanceClass *klass)
{
static gboolean initialized = FALSE;
if (!initialized) {
gst_color_balance_signals[VALUE_CHANGED] =
g_signal_new ("value_changed",
GST_TYPE_COLOR_BALANCE, G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstColorBalanceClass, value_changed),
NULL, NULL,
gst_color_balance_marshal_VOID__OBJECT_INT,
G_TYPE_NONE, 2,
GST_TYPE_COLOR_BALANCE_CHANNEL, G_TYPE_INT);
initialized = TRUE;
}
klass->balance_type = GST_COLOR_BALANCE_SOFTWARE;
/* default virtual functions */
klass->list_channels = NULL;
klass->set_value = NULL;
klass->get_value = NULL;
}
const GList *
gst_color_balance_list_channels (GstColorBalance *balance)
{
GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
if (klass->list_channels) {
return klass->list_channels (balance);
}
return NULL;
}
void
gst_color_balance_set_value (GstColorBalance *balance,
GstColorBalanceChannel *channel,
gint value)
{
GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
if (klass->set_value) {
klass->set_value (balance, channel, value);
}
}
gint
gst_color_balance_get_value (GstColorBalance *balance,
GstColorBalanceChannel *channel)
{
GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
if (klass->get_value) {
return klass->get_value (balance, channel);
}
return channel->min_value;
}
void
gst_color_balance_value_changed (GstColorBalance *balance,
GstColorBalanceChannel *channel,
gint value)
{
g_signal_emit (G_OBJECT (balance),
gst_color_balance_signals[VALUE_CHANGED],
0, channel, value);
g_signal_emit_by_name (G_OBJECT (channel), "value_changed", value);
}
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