1 /* GStreamer interactive videocrop test
2 *
3 * Copyright (C) 2008 Wim Taymans <wim.taymans@gmail.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include <stdlib.h>
26
27 #include <gst/gst.h>
28
29 static GstElement *
make_pipeline(gint type)30 make_pipeline (gint type)
31 {
32 GstElement *result;
33 gchar *pstr;
34
35 switch (type) {
36 case 0:
37 pstr = g_strdup_printf ("videotestsrc ! videocrop name=crop ! "
38 "xvimagesink");
39 break;
40 default:
41 return NULL;
42 }
43
44 result = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);
45 g_print ("created test %d: \"%s\"\n", type, pstr);
46 g_free (pstr);
47
48 return result;
49 }
50
51 #define MAX_ROUND 500
52
53 int
main(int argc,char ** argv)54 main (int argc, char **argv)
55 {
56 GstElement *pipe, *crop;
57 gint left, right;
58 gint top, bottom;
59 gint ldir, rdir;
60 gint tdir, bdir;
61 gint round, type, stop;
62
63 gst_init (&argc, &argv);
64
65 type = 0;
66 stop = -1;
67
68 if (argc > 1) {
69 type = atoi (argv[1]);
70 stop = type + 1;
71 }
72
73 while (TRUE) {
74 GstMessage *message;
75
76 pipe = make_pipeline (type);
77 if (pipe == NULL)
78 break;
79
80 crop = gst_bin_get_by_name (GST_BIN (pipe), "crop");
81 g_assert (crop);
82
83 top = bottom = left = right = 0;
84 tdir = bdir = 10;
85 ldir = rdir = 10;
86
87 for (round = 0; round < MAX_ROUND; round++) {
88 g_print ("crop to %4d %4d %4d %4d (%d/%d) \r", top, bottom, left, right,
89 round, MAX_ROUND);
90
91 g_object_set (crop, "top", top, "bottom", bottom, "left", left, "right",
92 right, NULL);
93
94 if (round == 0)
95 gst_element_set_state (pipe, GST_STATE_PLAYING);
96
97 top += tdir;
98 if (top >= 80)
99 tdir = -10;
100 else if (top < 10)
101 tdir = 10;
102
103 bottom += bdir;
104 if (bottom >= 60)
105 bdir = -10;
106 else if (bottom < 10)
107 bdir = 10;
108
109 left += ldir;
110 if (left >= 100)
111 ldir = -10;
112 else if (left < 10)
113 ldir = 10;
114
115 right += rdir;
116 if (right >= 80)
117 rdir = -10;
118 else if (right < 10)
119 rdir = 10;
120
121 message =
122 gst_bus_poll (GST_ELEMENT_BUS (pipe), GST_MESSAGE_ERROR,
123 50 * GST_MSECOND);
124 if (message) {
125 g_print ("got error \n");
126
127 gst_message_unref (message);
128 }
129 }
130 g_print ("test %d done \n", type);
131
132 gst_object_unref (crop);
133 gst_element_set_state (pipe, GST_STATE_NULL);
134 gst_object_unref (pipe);
135
136 type++;
137 if (type == stop)
138 break;
139 }
140 return 0;
141 }
142