gstreamer/examples/pingpong/pingpong.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gst/gst.h>
static GstElement*
make_bin (gint count)
{
GstElement *bin;
GstElement *src;
char *name;
name = g_strdup_printf ("bin%d", count);
bin = gst_bin_new (name);
g_free (name);
name = g_strdup_printf ("fakesrc%d", count);
src = gst_element_factory_make ("fakesrc", name);
g_free (name);
gst_bin_add (GST_BIN (bin), src);
gst_element_add_ghost_pad (bin, gst_element_get_pad (src, "src"), "src");
return bin;
}
gint
main (gint argc, gchar *argv[])
{
GstElement *pipeline;
GstElement *aggregator, *sink;
GstElement *bin1, *bin2;
GstPad *pad1, *pad2;
gint i;
gst_init (&argc, &argv);
pipeline = gst_pipeline_new ("main");
g_signal_connect (pipeline, "deep_notify",
G_CALLBACK (gst_element_default_deep_notify), NULL);
aggregator = gst_element_factory_make ("aggregator", "mixer");
sink = gst_element_factory_make ("fakesink", "sink");
gst_bin_add (GST_BIN (pipeline), aggregator);
gst_bin_add (GST_BIN (pipeline), sink);
gst_element_link_pads (aggregator, "src", sink, "sink");
bin1 = make_bin (1);
pad1 = gst_element_get_request_pad (aggregator, "sink%d");
gst_pad_link (gst_element_get_pad (bin1, "src"), pad1);
gst_bin_add (GST_BIN (pipeline), bin1);
bin2 = make_bin (2);
pad2 = gst_element_get_request_pad (aggregator, "sink%d");
gst_pad_link (gst_element_get_pad (bin2, "src"), pad2);
gst_bin_add (GST_BIN (pipeline), bin2);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
i = 2;
while (i--)
gst_bin_iterate (GST_BIN (pipeline));
g_print ("pause bin1\n");
gst_element_set_state (bin1, GST_STATE_PAUSED);
i = 4;
while (i--)
gst_bin_iterate (GST_BIN (pipeline));
g_print ("playing bin1\n");
gst_element_set_state (bin1, GST_STATE_PLAYING);
i = 4;
while (i--)
gst_bin_iterate (GST_BIN (pipeline));
gst_element_set_state (pipeline, GST_STATE_NULL);
return 0;
}