gstreamer/tests/sched/dynamic-pipeline.c

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#include <gst/gst.h>
int main (int argc, char *argv[])
{
GstElement *fakesrc, *fakesink1, *fakesink2, *pipe1, *pipe2;
gst_init(&argc, &argv);
if (argc!=1) {
g_print("usage: %s\n", argv[0]);
exit(-1);
}
fakesrc = gst_elementfactory_make("fakesrc", "fakesrc");
fakesink1 = gst_elementfactory_make("fakesink", "fakesink1");
fakesink2 = gst_elementfactory_make("fakesink", "fakesink2");
pipe1 = gst_pipeline_new("pipe1");
pipe2 = gst_pipeline_new("pipe2");
// make the first pipeline
gst_bin_add (GST_BIN(pipe1), fakesrc);
gst_bin_add (GST_BIN(pipe1), fakesink1);
gst_element_connect(fakesrc, "src", fakesink1, "sink");
// initialize cothreads
gst_element_set_state(pipe1, GST_STATE_PLAYING);
gst_element_set_state(pipe1, GST_STATE_READY);
// destroy the fakesink, but keep fakesrc (its state is GST_STATE_READY)
gst_element_disconnect(fakesrc, "src", fakesink1, "sink");
gst_object_ref(GST_OBJECT(fakesrc));
gst_bin_remove(GST_BIN(pipe1), fakesrc);
gst_bin_remove(GST_BIN(pipe1), fakesink1);
// make a new pipeline
gst_bin_add (GST_BIN(pipe2), fakesink2);
// don't change the new pipeline's state, it should change on the bin_add
gst_bin_add (GST_BIN(pipe2), fakesrc);
gst_element_connect(fakesrc, "src", fakesink2, "sink");
// show the pipeline state
xmlDocDump(stdout, gst_xml_write(pipe2));
// try to iterate the pipeline
gst_element_set_state(pipe2, GST_STATE_PLAYING);
gst_bin_iterate(GST_BIN(pipe2));
gst_element_set_state(pipe2, GST_STATE_NULL);
return 0;
}