1 /* GStreamer
2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3  * Copyright (C) <2003> David Schleef <ds@schleef.org>
4  * Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
5  * Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public
18  * License along with this library; if not, write to the
19  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 
24 #ifndef __GST_VIDEO_GAMMA_H__
25 #define __GST_VIDEO_GAMMA_H__
26 
27 #include <gst/gst.h>
28 #include <gst/video/video.h>
29 #include <gst/video/gstvideofilter.h>
30 
31 G_BEGIN_DECLS
32 
33 #define GST_TYPE_GAMMA \
34   (gst_gamma_get_type())
35 #define GST_GAMMA(obj) \
36   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GAMMA,GstGamma))
37 #define GST_GAMMA_CLASS(klass) \
38   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GAMMA,GstGammaClass))
39 #define GST_IS_GAMMA(obj) \
40   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GAMMA))
41 #define GST_IS_GAMMA_CLASS(klass) \
42   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GAMMA))
43 
44 typedef struct _GstGamma GstGamma;
45 typedef struct _GstGammaClass GstGammaClass;
46 
47 /**
48  * GstGamma:
49  *
50  * Opaque data structure.
51  */
52 struct _GstGamma
53 {
54   GstVideoFilter videofilter;
55 
56   /* < private > */
57   /* properties */
58   gdouble gamma;
59 
60   /* tables */
61   guint8 gamma_table[256];
62 
63   void (*process) (GstGamma *gamma, GstVideoFrame *frame);
64 };
65 
66 struct _GstGammaClass
67 {
68   GstVideoFilterClass parent_class;
69 };
70 
71 GType gst_gamma_get_type(void);
72 
73 G_END_DECLS
74 
75 #endif /* __GST_VIDEO_GAMMA_H__ */
76