1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/* GStreamer
* Copyright (C) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <gst/gst.h>
#include <gst/interfaces/propertyprobe.h>
int
main (int argc, char *argv[])
{
GstElement *src, *sink;
GstElement *bin;
GstPropertyProbe *probe = NULL;
const GParamSpec *pspec = NULL;
GValueArray *array = NULL;
gint i, ret;
GValue *value;
const gchar *device;
gchar *name;
guint flags;
gst_init (&argc, &argv);
bin = gst_pipeline_new ("pipeline");
g_assert (bin);
src = gst_element_factory_make ("v4l2src", "v4l2_source");
g_assert (src);
sink = gst_element_factory_make ("fakesink", "fake_sink");
g_assert (sink);
/* add objects to the main pipeline */
gst_bin_add_many (GST_BIN (bin), src, sink, NULL);
/* link the elements */
gst_element_link_many (src, sink, NULL);
/* probe devices */
g_print ("Probing devices with propertyprobe...\n");
probe = GST_PROPERTY_PROBE (src);
pspec = gst_property_probe_get_property (probe, "device");
array = gst_property_probe_probe_and_get_values (probe, pspec);
if (!array) {
g_print ("No device found\n");
exit (1);
}
for (i = 0; i < array->n_values; i++) {
value = g_value_array_get_nth (array, i);
device = g_value_get_string (value);
g_print ("Device: %s\n", device);
g_object_set_property (G_OBJECT (src), "device", value);
gst_element_set_state (bin, GST_STATE_READY);
ret = gst_element_get_state (bin, NULL, NULL, 10 * GST_SECOND);
if (ret != GST_STATE_CHANGE_SUCCESS) {
g_print ("Couldn't set STATE_READY\n");
continue;
}
g_object_get (G_OBJECT (src), "device-name", &name, NULL);
g_print ("Name: %s\n", name);
g_free (name);
g_object_get (G_OBJECT (src), "flags", &flags, NULL);
g_print ("Flags: 0x%08X\n", flags);
gst_element_set_state (bin, GST_STATE_NULL);
g_print ("\n");
}
exit (0);
}
|
