1 /* GStreamer
2  * Copyright (C) 2006 Nokia <stefan.kost@nokia.com
3  *
4  * videoorientation.h: video flipping and centering interface
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the
18  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef __GST_VIDEO_ORIENTATION_H__
23 #define __GST_VIDEO_ORIENTATION_H__
24 
25 #include <gst/gst.h>
26 #include <gst/video/video-prelude.h>
27 
28 G_BEGIN_DECLS
29 
30 #define GST_TYPE_VIDEO_ORIENTATION \
31   (gst_video_orientation_get_type ())
32 #define GST_VIDEO_ORIENTATION(obj) \
33   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VIDEO_ORIENTATION, GstVideoOrientation))
34 #define GST_IS_VIDEO_ORIENTATION(obj) \
35   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VIDEO_ORIENTATION))
36 #define GST_VIDEO_ORIENTATION_GET_INTERFACE(inst) \
37   (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_VIDEO_ORIENTATION, GstVideoOrientationInterface))
38 
39 /**
40  * GstVideoOrientation:
41  *
42  * Opaque #GstVideoOrientation data structure.
43  */
44 typedef struct _GstVideoOrientation GstVideoOrientation;
45 typedef struct _GstVideoOrientationInterface GstVideoOrientationInterface;
46 
47 /**
48  * GstVideoOrientationInterface:
49  * @iface: parent interface type.
50  * @get_hflip: virtual method to get horizontal flipping state
51  * @get_vflip: virtual method to get vertical flipping state
52  * @get_hcenter: virtual method to get horizontal centering state
53  * @get_vcenter: virtual method to get vertical centering state
54  * @set_hflip: virtual method to set horizontal flipping state
55  * @set_vflip: virtual method to set vertical flipping state
56  * @set_hcenter: virtual method to set horizontal centering state
57  * @set_vcenter: virtual method to set vertical centering state
58  *
59  * #GstVideoOrientationInterface interface.
60  */
61 struct _GstVideoOrientationInterface {
62   GTypeInterface iface;
63 
64   /* FIXME 0.11: fix awkward API? add some kind of get_supported flags thing
65    * and then just return booleans/int from all vfuncs requiring the caller
66    * to check the flags first */
67 
68   /* virtual functions */
69   gboolean (* get_hflip)   (GstVideoOrientation *video_orientation, gboolean *flip);
70   gboolean (* get_vflip)   (GstVideoOrientation *video_orientation, gboolean *flip);
71   gboolean (* get_hcenter) (GstVideoOrientation *video_orientation, gint *center);
72   gboolean (* get_vcenter) (GstVideoOrientation *video_orientation, gint *center);
73 
74   gboolean (* set_hflip)   (GstVideoOrientation *video_orientation, gboolean flip);
75   gboolean (* set_vflip)   (GstVideoOrientation *video_orientation, gboolean flip);
76   gboolean (* set_hcenter) (GstVideoOrientation *video_orientation, gint center);
77   gboolean (* set_vcenter) (GstVideoOrientation *video_orientation, gint center);
78 };
79 
80 GST_VIDEO_API
81 GType           gst_video_orientation_get_type              (void);
82 
83 /* virtual class function wrappers */
84 
85 GST_VIDEO_API
86 gboolean gst_video_orientation_get_hflip (GstVideoOrientation *video_orientation, gboolean *flip);
87 
88 GST_VIDEO_API
89 gboolean gst_video_orientation_get_vflip (GstVideoOrientation *video_orientation, gboolean *flip);
90 
91 GST_VIDEO_API
92 gboolean gst_video_orientation_get_hcenter (GstVideoOrientation *video_orientation, gint *center);
93 
94 GST_VIDEO_API
95 gboolean gst_video_orientation_get_vcenter (GstVideoOrientation *video_orientation, gint *center);
96 
97 GST_VIDEO_API
98 gboolean gst_video_orientation_set_hflip (GstVideoOrientation *video_orientation, gboolean flip);
99 
100 GST_VIDEO_API
101 gboolean gst_video_orientation_set_vflip (GstVideoOrientation *video_orientation, gboolean flip);
102 
103 GST_VIDEO_API
104 gboolean gst_video_orientation_set_hcenter (GstVideoOrientation *video_orientation, gint center);
105 
106 GST_VIDEO_API
107 gboolean gst_video_orientation_set_vcenter (GstVideoOrientation *video_orientation, gint center);
108 
109 G_END_DECLS
110 
111 #endif /* __GST_VIDEO_ORIENTATION_H__ */
112