GStreamer hello world

#include <gst/gst.h>
#include <stdbool.h>
 
static GMainLoop *loop;
 
static gboolean bus_call(GstBus *bus, GstMessage *msg, void *user_data)
{
	switch (GST_MESSAGE_TYPE(msg)) {
	case GST_MESSAGE_EOS: {
		g_message("End-of-stream");
		g_main_loop_quit(loop);
		break;
	}
	case GST_MESSAGE_ERROR: {
		GError *err;
		gst_message_parse_error(msg, &err, NULL);
		g_error("%s", err->message);
		g_error_free(err);
 
		g_main_loop_quit(loop);
		break;
	}
	default:
		break;
	}
 
	return true;
}
 
static void play_uri(const char *uri)
{
	GstElement *pipeline;
	GstBus *bus;
 
	loop = g_main_loop_new(NULL, FALSE);
	pipeline = gst_element_factory_make("playbin", "player");
 
	if (uri)
		g_object_set(G_OBJECT(pipeline), "uri", uri, NULL);
 
	bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
	gst_bus_add_watch(bus, bus_call, NULL);
	gst_object_unref(bus);
 
	gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING);
 
	g_main_loop_run(loop);
 
	gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_NULL);
	gst_object_unref(GST_OBJECT(pipeline));
}
 
int main(int argc, char *argv[])
{
	gst_init(&argc, &argv);
	play_uri(argv[1]);
	return 0;
}