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100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* GStreamer
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*
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@gmail.com>
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*
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* gstv4l2colorbalance.c: color balance interface implementation for V4L2
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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 <gst/gst.h>
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#include "gstv4l2colorbalance.h"
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#include "gstv4l2object.h"
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#define gst_v4l2_color_balance_channel_parent_class parent_class
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G_DEFINE_TYPE (GstV4l2ColorBalanceChannel,
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gst_v4l2_color_balance_channel, GST_TYPE_COLOR_BALANCE_CHANNEL);
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static void
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gst_v4l2_color_balance_channel_class_init (GstV4l2ColorBalanceChannelClass *
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klass)
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{
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}
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static void
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gst_v4l2_color_balance_channel_init (GstV4l2ColorBalanceChannel * channel)
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{
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channel->id = (guint32) - 1;
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}
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static G_GNUC_UNUSED gboolean
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gst_v4l2_color_balance_contains_channel (GstV4l2Object * v4l2object,
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GstV4l2ColorBalanceChannel * v4l2channel)
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{
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const GList *item;
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for (item = v4l2object->colors; item != NULL; item = item->next)
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if (item->data == v4l2channel)
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return TRUE;
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return FALSE;
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}
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const GList *
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gst_v4l2_color_balance_list_channels (GstV4l2Object * v4l2object)
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{
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return v4l2object->colors;
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}
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void
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gst_v4l2_color_balance_set_value (GstV4l2Object * v4l2object,
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GstColorBalanceChannel * channel, gint value)
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{
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GstV4l2ColorBalanceChannel *v4l2channel =
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GST_V4L2_COLOR_BALANCE_CHANNEL (channel);
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/* assert that we're opened and that we're using a known item */
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g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
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g_return_if_fail (gst_v4l2_color_balance_contains_channel (v4l2object,
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v4l2channel));
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gst_v4l2_set_attribute (v4l2object, v4l2channel->id, value);
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}
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gint
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gst_v4l2_color_balance_get_value (GstV4l2Object * v4l2object,
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GstColorBalanceChannel * channel)
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{
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GstV4l2ColorBalanceChannel *v4l2channel =
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GST_V4L2_COLOR_BALANCE_CHANNEL (channel);
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gint value;
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/* assert that we're opened and that we're using a known item */
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g_return_val_if_fail (GST_V4L2_IS_OPEN (v4l2object), 0);
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g_return_val_if_fail (gst_v4l2_color_balance_contains_channel (v4l2object,
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v4l2channel), 0);
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if (!gst_v4l2_get_attribute (v4l2object, v4l2channel->id, &value))
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return 0;
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return value;
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}
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