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136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* GStreamer Color Balance
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* colorbalance.c: image color balance interface design
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* virtual class function wrappers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "colorbalance.h"
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#include "colorbalance-marshal.h"
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enum
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{
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VALUE_CHANGED,
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LAST_SIGNAL
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};
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static void gst_color_balance_class_init (GstColorBalanceClass * klass);
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static guint gst_color_balance_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_color_balance_get_type (void)
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{
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static GType gst_color_balance_type = 0;
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if (!gst_color_balance_type) {
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static const GTypeInfo gst_color_balance_info = {
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sizeof (GstColorBalanceClass),
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(GBaseInitFunc) gst_color_balance_class_init,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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0,
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NULL,
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};
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gst_color_balance_type = g_type_register_static (G_TYPE_INTERFACE,
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"GstColorBalance", &gst_color_balance_info, 0);
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g_type_interface_add_prerequisite (gst_color_balance_type,
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GST_TYPE_IMPLEMENTS_INTERFACE);
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}
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return gst_color_balance_type;
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}
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static void
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gst_color_balance_class_init (GstColorBalanceClass * klass)
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{
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static gboolean initialized = FALSE;
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if (!initialized) {
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gst_color_balance_signals[VALUE_CHANGED] =
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g_signal_new ("value-changed",
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GST_TYPE_COLOR_BALANCE, G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstColorBalanceClass, value_changed),
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NULL, NULL,
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gst_color_balance_marshal_VOID__OBJECT_INT,
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G_TYPE_NONE, 2, GST_TYPE_COLOR_BALANCE_CHANNEL, G_TYPE_INT);
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initialized = TRUE;
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}
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klass->balance_type = GST_COLOR_BALANCE_SOFTWARE;
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/* default virtual functions */
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klass->list_channels = NULL;
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klass->set_value = NULL;
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klass->get_value = NULL;
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}
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const GList *
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gst_color_balance_list_channels (GstColorBalance * balance)
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{
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GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
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if (klass->list_channels) {
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return klass->list_channels (balance);
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}
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return NULL;
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}
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void
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gst_color_balance_set_value (GstColorBalance * balance,
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GstColorBalanceChannel * channel, gint value)
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{
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GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
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if (klass->set_value) {
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klass->set_value (balance, channel, value);
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}
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}
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gint
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gst_color_balance_get_value (GstColorBalance * balance,
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GstColorBalanceChannel * channel)
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{
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GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance);
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if (klass->get_value) {
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return klass->get_value (balance, channel);
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}
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return channel->min_value;
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}
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void
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gst_color_balance_value_changed (GstColorBalance * balance,
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GstColorBalanceChannel * channel, gint value)
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{
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g_signal_emit (G_OBJECT (balance),
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gst_color_balance_signals[VALUE_CHANGED], 0, channel, value);
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g_signal_emit_by_name (G_OBJECT (channel), "value_changed", value);
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}
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