gstreamer/tests/sched/dynamic-pipeline.c

#include <gst/gst.h>

/* This test will fail because it tries to allocate two cothread_context's in
 * one thread. This will cause a segfault. This is a problem with gstreamer's
 * cothreading that is fixed in the newer cothreads package.
 */

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_element_factory_make("fakesrc", "fakesrc");
    fakesink1 = gst_element_factory_make("fakesink", "fakesink1");
    fakesink2 = gst_element_factory_make("fakesink", "fakesink2");

    /* a crucial part of this test (and one that the old cothreads fails on) is
       having two active pipelines in the same thread. */
    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_pads (fakesrc, "src", fakesink1, "sink");
    
    /* initialize cothreads */
    gst_element_set_state(pipe1, GST_STATE_PLAYING);
    gst_bin_iterate (GST_BIN (pipe1));
    gst_element_set_state(pipe1, GST_STATE_READY);
    
    /* destroy the fakesink, but keep fakesrc (its state is GST_STATE_READY) */
    gst_element_disconnect_pads (fakesrc, "src", fakesink1, "sink");
    gst_object_ref(GST_OBJECT(fakesrc));
    gst_bin_remove(GST_BIN(pipe1), fakesrc);
    gst_bin_remove(GST_BIN(pipe1), fakesink1);

    gst_object_unref (GST_OBJECT (pipe1));
    
    /* 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_pads (fakesrc, "src", fakesink2, "sink");
    
    /* show the pipeline state */
    gst_xml_write_file (GST_ELEMENT (pipe2), stdout);
    
    /* 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;
}