1 /*
2 * GStreamer
3 * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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., 51 Franklin St, Fifth Floor,
41 * Boston, MA 02110-1301, USA.
42 */
43
44 /**
45 * SECTION:element-cverode
46 *
47 * Erodes the image with the cvErode OpenCV function.
48 *
49 * Example launch line
50 *
51 * |[
52 * gst-launch-1.0 videotestsrc ! cverode ! videoconvert ! autovideosink
53 * ]|
54 */
55
56 #ifdef HAVE_CONFIG_H
57 # include <config.h>
58 #endif
59
60 #include "gstcverode.h"
61 #include <opencv2/imgproc.hpp>
62
63
64 GST_DEBUG_CATEGORY_STATIC (gst_cv_erode_debug);
65 #define GST_CAT_DEFAULT gst_cv_erode_debug
66
67 G_DEFINE_TYPE_WITH_CODE (GstCvErode, gst_cv_erode, GST_TYPE_CV_DILATE_ERODE,
68 GST_DEBUG_CATEGORY_INIT (gst_cv_erode_debug, "cverode", 0, "cverode");
69 );
70 GST_ELEMENT_REGISTER_DEFINE (cverode, "cverode", GST_RANK_NONE,
71 GST_TYPE_CV_ERODE);
72
73 static GstFlowReturn gst_cv_erode_transform_ip (GstOpencvVideoFilter *
74 filter, GstBuffer * buf, cv::Mat img);
75
76 /* initialize the cverode's class */
77 static void
gst_cv_erode_class_init(GstCvErodeClass * klass)78 gst_cv_erode_class_init (GstCvErodeClass * klass)
79 {
80 GstOpencvVideoFilterClass *gstopencvbasefilter_class;
81 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
82
83 gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
84
85 gstopencvbasefilter_class->cv_trans_ip_func = gst_cv_erode_transform_ip;
86 gst_element_class_set_static_metadata (element_class,
87 "cverode",
88 "Transform/Effect/Video",
89 "Applies cvErode OpenCV function to the image",
90 "Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
91 }
92
93 /* initialize the new element
94 * instantiate pads and add them to element
95 * set pad callback functions
96 * initialize instance structure
97 */
98 static void
gst_cv_erode_init(GstCvErode * filter)99 gst_cv_erode_init (GstCvErode * filter)
100 {
101 }
102
103 static GstFlowReturn
gst_cv_erode_transform_ip(GstOpencvVideoFilter * base,GstBuffer * buf,cv::Mat img)104 gst_cv_erode_transform_ip (GstOpencvVideoFilter * base, GstBuffer * buf,
105 cv::Mat img)
106 {
107 GstCvDilateErode *filter = GST_CV_DILATE_ERODE (base);
108
109 cv::erode (img, img, cv::Mat (), cv::Point (-1, -1), filter->iterations);
110
111 return GST_FLOW_OK;
112 }
113