1 /* GStreamer GdkPixbuf overlay
2  * Copyright (C) 2012-2014 Tim-Philipp Müller <tim centricular net>
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 #ifndef _GST_GDK_PIXBUF_OVERLAY_H_
21 #define _GST_GDK_PIXBUF_OVERLAY_H_
22 
23 #include <gst/video/video.h>
24 #include <gst/video/gstvideofilter.h>
25 #include <gst/video/video-overlay-composition.h>
26 
27 #include <gdk-pixbuf/gdk-pixbuf.h>
28 
29 G_BEGIN_DECLS
30 
31 #define GST_TYPE_GDK_PIXBUF_OVERLAY   (gst_gdk_pixbuf_overlay_get_type())
32 #define GST_GDK_PIXBUF_OVERLAY(obj)   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlay))
33 #define GST_GDK_PIXBUF_OVERLAY_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlayClass))
34 #define GST_IS_GDK_PIXBUF_OVERLAY(obj)   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDK_PIXBUF_OVERLAY))
35 #define GST_IS_GDK_PIXBUF_OVERLAY_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDK_PIXBUF_OVERLAY))
36 
37 typedef struct _GstGdkPixbufOverlay GstGdkPixbufOverlay;
38 typedef struct _GstGdkPixbufOverlayClass GstGdkPixbufOverlayClass;
39 
40 typedef enum {
41   GST_GDK_PIXBUF_POSITIONING_PIXELS_RELATIVE_TO_EDGES,
42   GST_GDK_PIXBUF_POSITIONING_PIXELS_ABSOLUTE
43 } GstGdkPixbufPositioningMode;
44 
45 /**
46  * GstGdkPixbufOverlay:
47  *
48  * The opaque element instance structure.
49  */
50 struct _GstGdkPixbufOverlay
51 {
52   GstVideoFilter               videofilter;
53 
54   /* properties */
55   gchar                      * location;
56 
57   /* pixbuf set via pixbuf property */
58   GdkPixbuf                  * pixbuf;
59 
60   gint                         offset_x;
61   gint                         offset_y;
62 
63   gdouble                      relative_x;
64   gdouble                      relative_y;
65 
66   gdouble                      coef_x;
67   gdouble                      coef_y;
68 
69   GstGdkPixbufPositioningMode  positioning_mode;
70 
71   gint                         overlay_width;
72   gint                         overlay_height;
73 
74   gdouble                      alpha;
75 
76   /* the loaded image, as BGRA/ARGB pixels, with GstVideoMeta */
77   GstBuffer                  * pixels;               /* OBJECT_LOCK */
78 
79   GstVideoOverlayComposition * comp;
80 
81   /* render position or dimension has changed */
82   gboolean                     update_composition;
83 };
84 
85 struct _GstGdkPixbufOverlayClass
86 {
87   GstVideoFilterClass  videofilter_class;
88 };
89 
90 GType gst_gdk_pixbuf_overlay_get_type (void);
91 
92 G_END_DECLS
93 
94 #endif
95