1 /* GStreamer
2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 
21 #ifndef __GST_VIDEO_BALANCE_H__
22 #define __GST_VIDEO_BALANCE_H__
23 
24 #include <gst/gst.h>
25 #include <gst/video/video.h>
26 #include <gst/video/gstvideofilter.h>
27 
28 G_BEGIN_DECLS
29 
30 #define GST_TYPE_VIDEO_BALANCE \
31   (gst_video_balance_get_type())
32 #define GST_VIDEO_BALANCE(obj) \
33   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_BALANCE,GstVideoBalance))
34 #define GST_VIDEO_BALANCE_CLASS(klass) \
35   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_BALANCE,GstVideoBalanceClass))
36 #define GST_IS_VIDEO_BALANCE(obj) \
37   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_BALANCE))
38 #define GST_IS_VIDEO_BALANCE_CLASS(klass) \
39   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_BALANCE))
40 
41 typedef struct _GstVideoBalance GstVideoBalance;
42 typedef struct _GstVideoBalanceClass GstVideoBalanceClass;
43 
44 /**
45  * GstVideoBalance:
46  *
47  * Opaque data structure.
48  */
49 struct _GstVideoBalance {
50   GstVideoFilter videofilter;
51 
52   /* < private > */
53 
54   /* channels for interface */
55   GList *channels;
56 
57   /* properties */
58   gdouble contrast;
59   gdouble brightness;
60   gdouble hue;
61   gdouble saturation;
62 
63   /* tables */
64   guint8 tabley[256];
65   guint8 *tableu[256];
66   guint8 *tablev[256];
67 
68   void (*process) (GstVideoBalance *balance, GstVideoFrame *frame);
69 };
70 
71 struct _GstVideoBalanceClass {
72   GstVideoFilterClass parent_class;
73 };
74 
75 GType gst_video_balance_get_type(void);
76 
77 G_END_DECLS
78 
79 #endif /* __GST_VIDEO_BALANCE_H__ */
80