1 /* GStreamer interactive videoscale test
2 * Copyright (C) 2008 Wim Taymans <wim.taymans@gmail.com>
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 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <stdlib.h>
25
26 #include <gst/gst.h>
27
28 static GstElement *
make_pipeline(gint type)29 make_pipeline (gint type)
30 {
31 GstElement *result;
32 gchar *pstr;
33
34 switch (type) {
35 case 0:
36 pstr = g_strdup_printf ("videotestsrc ! capsfilter name=filter ! "
37 "ximagesink");
38 break;
39 case 1:
40 pstr = g_strdup_printf ("videotestsrc ! queue ! capsfilter name=filter ! "
41 "ximagesink");
42 break;
43 case 2:
44 pstr = g_strdup_printf ("videotestsrc ! videoscale ! "
45 "capsfilter name=filter ! " "ximagesink");
46 break;
47 case 3:
48 pstr =
49 g_strdup_printf ("videotestsrc ! queue ! videoscale ! "
50 "capsfilter name=filter ! " "ximagesink");
51 break;
52 case 4:
53 pstr =
54 g_strdup_printf ("videotestsrc ! videoscale ! queue ! "
55 "capsfilter name=filter ! " "ximagesink");
56 break;
57 case 5:
58 pstr = g_strdup_printf ("v4l2src ! videoconvert ! videoscale ! "
59 "capsfilter name=filter ! " "ximagesink");
60 break;
61 default:
62 return NULL;
63 }
64
65 result = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);
66 g_print ("created test %d: \"%s\"\n", type, pstr);
67 g_free (pstr);
68
69 return result;
70 }
71
72 #define MAX_ROUND 100
73
74 int
main(int argc,char ** argv)75 main (int argc, char **argv)
76 {
77 GstElement *pipe, *filter;
78 GstCaps *caps;
79 gint width, height;
80 gint xdir, ydir;
81 gint round, type, stop;
82
83 gst_init (&argc, &argv);
84
85 type = 0;
86 stop = -1;
87
88 if (argc > 1) {
89 type = atoi (argv[1]);
90 stop = type + 1;
91 }
92
93 while (TRUE) {
94 GstMessage *message;
95
96 pipe = make_pipeline (type);
97 if (pipe == NULL)
98 break;
99
100 filter = gst_bin_get_by_name (GST_BIN (pipe), "filter");
101 g_assert (filter);
102
103 width = 320;
104 height = 240;
105 xdir = ydir = -10;
106
107 for (round = 0; round < MAX_ROUND; round++) {
108 gchar *capsstr;
109 g_print ("resize to %dx%d (%d/%d) \r", width, height, round, MAX_ROUND);
110
111 /* we prefer our fixed width and height but allow other dimensions to pass
112 * as well */
113 capsstr =
114 g_strdup_printf ("video/x-raw, width=(int)%d, height=(int)%d;"
115 "video/x-raw", width, height);
116
117 caps = gst_caps_from_string (capsstr);
118 g_free (capsstr);
119 g_object_set (filter, "caps", caps, NULL);
120 gst_caps_unref (caps);
121
122 if (round == 0)
123 gst_element_set_state (pipe, GST_STATE_PLAYING);
124
125 width += xdir;
126 if (width >= 320)
127 xdir = -10;
128 else if (width < 200)
129 xdir = 10;
130
131 height += ydir;
132 if (height >= 240)
133 ydir = -10;
134 else if (height < 150)
135 ydir = 10;
136
137 message =
138 gst_bus_poll (GST_ELEMENT_BUS (pipe), GST_MESSAGE_ERROR,
139 50 * GST_MSECOND);
140 if (message) {
141 g_print ("got error \n");
142
143 gst_message_unref (message);
144 }
145 }
146 g_print ("test %d done \n", type);
147
148 gst_object_unref (filter);
149 gst_element_set_state (pipe, GST_STATE_NULL);
150 gst_object_unref (pipe);
151
152 type++;
153 if (type == stop)
154 break;
155 }
156 return 0;
157 }
158