blob: 85df121da4ac1f7cd54e8c2cfed56872f89dcf58 [file] [log] [blame]
Olivier Naudanb28313f2012-04-16 08:10:18 -04001/*
2 * GStreamer
3 * Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Alternatively, the contents of this file may be used under the
24 * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
25 * which case the following provisions apply instead of the ones
26 * mentioned above:
27 *
28 * This library is free software; you can redistribute it and/or
29 * modify it under the terms of the GNU Library General Public
30 * License as published by the Free Software Foundation; either
31 * version 2 of the License, or (at your option) any later version.
32 *
33 * This library is distributed in the hope that it will be useful,
34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
36 * Library General Public License for more details.
37 *
38 * You should have received a copy of the GNU Library General Public
39 * License along with this library; if not, write to the
40 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
41 * Boston, MA 02111-1307, USA.
42 */
43
44#ifdef HAVE_CONFIG_H
45# include <config.h>
46#endif
47
48#include <gst/gst.h>
49#include <math.h>
50
51#include "gstmirror.h"
52
53GST_DEBUG_CATEGORY_STATIC (gst_mirror_debug);
54#define GST_CAT_DEFAULT gst_mirror_debug
55
56enum
57{
58 PROP_0,
59 PROP_MODE
60};
61
62#define DEFAULT_PROP_MODE GST_MIRROR_MODE_LEFT
63
Sebastian Dröge7e661862012-05-21 15:50:23 +020064#define gst_mirror_parent_class parent_class
65G_DEFINE_TYPE (GstMirror, gst_mirror, GST_TYPE_GEOMETRIC_TRANSFORM);
Olivier Naudanb28313f2012-04-16 08:10:18 -040066
67#define GST_TYPE_MIRROR_MODE (gst_mirror_mode_get_type())
68static GType
69gst_mirror_mode_get_type (void)
70{
71 static GType mode_type = 0;
72
73 static const GEnumValue modes[] = {
74 {GST_MIRROR_MODE_LEFT, "Split horizontally and reflect left into right",
75 "left"},
76 {GST_MIRROR_MODE_RIGHT, "Split horizontally and reflect right into left",
77 "right"},
78 {GST_MIRROR_MODE_TOP, "Split vertically and reflect top into bottom",
79 "top"},
80 {GST_MIRROR_MODE_BOTTOM, "Split vertically and reflect bottom into top",
81 "bottom"},
82 {0, NULL, NULL},
83 };
84
85 if (!mode_type) {
86 mode_type = g_enum_register_static ("GstMirrorMode", modes);
87 }
88 return mode_type;
89}
90
91
92static void
93gst_mirror_set_property (GObject * object, guint prop_id,
94 const GValue * value, GParamSpec * pspec)
95{
96 GstMirror *filter = GST_MIRROR_CAST (object);
97
98 switch (prop_id) {
99 case PROP_MODE:
100 GST_OBJECT_LOCK (filter);
101 filter->mode = g_value_get_enum (value);
102 GST_OBJECT_UNLOCK (filter);
103 break;
104 default:
105 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
106 break;
107 }
108}
109
110static void
111gst_mirror_get_property (GObject * object, guint prop_id,
112 GValue * value, GParamSpec * pspec)
113{
114 GstMirror *filter = GST_MIRROR_CAST (object);
115
116 switch (prop_id) {
117 case PROP_MODE:
118 g_value_set_enum (value, filter->mode);
119 break;
120 default:
121 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
122 break;
123 }
124}
125
Olivier Naudanb28313f2012-04-16 08:10:18 -0400126static gboolean
127mirror_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
128 gdouble * in_y)
129{
130 GstMirror *mirror = GST_MIRROR_CAST (gt);
131
132 gdouble hw = gt->width / 2.0 - 1.0;
133 gdouble hh = gt->height / 2.0 - 1.0;
134
135 switch (mirror->mode) {
136 case GST_MIRROR_MODE_LEFT:
137 if (x > hw)
138 *in_x = gt->width - 1.0 - x;
139 else
140 *in_x = x;
141 *in_y = y;
142 break;
143 case GST_MIRROR_MODE_RIGHT:
144 if (x > hw)
145 *in_x = x;
146 else
147 *in_x = gt->width - 1.0 - x;
148 *in_y = y;
149 break;
150 case GST_MIRROR_MODE_TOP:
151 if (y > hh)
152 *in_y = gt->height - 1.0 - y;
153 else
154 *in_y = y;
155 *in_x = x;
156 break;
157 case GST_MIRROR_MODE_BOTTOM:
158 if (y > hh)
159 *in_y = y;
160 else
161 *in_y = gt->height - 1.0 - y;
162 *in_x = x;
163 break;
164 default:
165 g_assert_not_reached ();
166 }
167
168 GST_DEBUG_OBJECT (mirror, "Inversely mapped %d %d into %lf %lf",
169 x, y, *in_x, *in_y);
170
171 return TRUE;
172}
173
174static void
175gst_mirror_class_init (GstMirrorClass * klass)
176{
177 GObjectClass *gobject_class;
Sebastian Dröge7e661862012-05-21 15:50:23 +0200178 GstElementClass *gstelement_class;
Olivier Naudanb28313f2012-04-16 08:10:18 -0400179 GstGeometricTransformClass *gstgt_class;
180
181 gobject_class = (GObjectClass *) klass;
Sebastian Dröge7e661862012-05-21 15:50:23 +0200182 gstelement_class = (GstElementClass *) klass;
Olivier Naudanb28313f2012-04-16 08:10:18 -0400183 gstgt_class = (GstGeometricTransformClass *) klass;
184
Sebastian Dröge7e661862012-05-21 15:50:23 +0200185 gst_element_class_set_details_simple (gstelement_class,
186 "mirror",
187 "Transform/Effect/Video",
188 "Split the image into two halves and reflect one over each other",
189 "Filippo Argiolas <filippo.argiolas@gmail.com>");
190
Olivier Naudanb28313f2012-04-16 08:10:18 -0400191 gobject_class->set_property = gst_mirror_set_property;
192 gobject_class->get_property = gst_mirror_get_property;
193
194 g_object_class_install_property (gobject_class, PROP_MODE,
195 g_param_spec_enum ("mode", "Mirror Mode",
196 "How to split the video frame and which side reflect",
197 GST_TYPE_MIRROR_MODE, DEFAULT_PROP_MODE,
198 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
199
200 parent_class = g_type_class_peek_parent (klass);
201
202 gstgt_class->map_func = mirror_map;
203}
204
205static void
Sebastian Dröge7e661862012-05-21 15:50:23 +0200206gst_mirror_init (GstMirror * filter)
Olivier Naudanb28313f2012-04-16 08:10:18 -0400207{
208 GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
209
210 filter->mode = DEFAULT_PROP_MODE;
211 gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
212}
213
214gboolean
215gst_mirror_plugin_init (GstPlugin * plugin)
216{
217 GST_DEBUG_CATEGORY_INIT (gst_mirror_debug, "mirror", 0, "mirror");
218
219 return gst_element_register (plugin, "mirror", GST_RANK_NONE,
220 GST_TYPE_MIRROR);
221}