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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
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/* GStreamer
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* Copyright (C) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#include <gst/gst.h>
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#include <gst/interfaces/propertyprobe.h>
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int
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main (int argc, char *argv[])
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{
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GstElement *src, *sink;
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GstElement *bin;
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GstPropertyProbe *probe = NULL;
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const GParamSpec *pspec = NULL;
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GValueArray *array = NULL;
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gint i, ret;
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GValue *value;
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const gchar *device;
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gchar *name;
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guint flags;
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gst_init (&argc, &argv);
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bin = gst_pipeline_new ("pipeline");
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g_assert (bin);
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src = gst_element_factory_make ("v4l2src", "v4l2_source");
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g_assert (src);
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sink = gst_element_factory_make ("fakesink", "fake_sink");
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g_assert (sink);
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/* add objects to the main pipeline */
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gst_bin_add_many (GST_BIN (bin), src, sink, NULL);
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/* link the elements */
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gst_element_link_many (src, sink, NULL);
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/* probe devices */
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g_print ("Probing devices with propertyprobe...\n");
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probe = GST_PROPERTY_PROBE (src);
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pspec = gst_property_probe_get_property (probe, "device");
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array = gst_property_probe_probe_and_get_values (probe, pspec);
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if (!array) {
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g_print ("No device found\n");
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exit (1);
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}
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for (i = 0; i < array->n_values; i++) {
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value = g_value_array_get_nth (array, i);
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device = g_value_get_string (value);
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g_print ("Device: %s\n", device);
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g_object_set_property (G_OBJECT (src), "device", value);
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gst_element_set_state (bin, GST_STATE_READY);
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ret = gst_element_get_state (bin, NULL, NULL, 10 * GST_SECOND);
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if (ret != GST_STATE_CHANGE_SUCCESS) {
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g_print ("Couldn't set STATE_READY\n");
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continue;
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}
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g_object_get (G_OBJECT (src), "device-name", &name, NULL);
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g_print ("Name: %s\n", name);
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g_free (name);
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g_object_get (G_OBJECT (src), "flags", &flags, NULL);
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g_print ("Flags: 0x%08X\n", flags);
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gst_element_set_state (bin, GST_STATE_NULL);
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g_print ("\n");
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}
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exit (0);
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}
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