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80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
#include <gst/gst.h>
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static GMainLoop *loop;
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static gboolean
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my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
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{
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g_print ("Got %s message\n", GST_MESSAGE_TYPE_NAME (message));
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:{
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GError *err;
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gchar *debug;
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gst_message_parse_error (message, &err, &debug);
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g_print ("Error: %s\n", err->message);
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g_error_free (err);
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g_free (debug);
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g_main_loop_quit (loop);
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break;
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}
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case GST_MESSAGE_EOS:
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/* end-of-stream */
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g_main_loop_quit (loop);
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break;
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default:
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/* unhandled message */
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break;
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}
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/* we want to be notified again the next time there is a message
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* on the bus, so returning TRUE (FALSE means we want to stop watching
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* for messages on the bus and our callback should not be called again)
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*/
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return TRUE;
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}
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gint
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main (gint argc, gchar * argv[])
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{
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GstElement *pipeline;
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GstBus *bus;
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guint bus_watch_id;
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/* init */
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gst_init (&argc, &argv);
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/* create pipeline, add handler */
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pipeline = gst_pipeline_new ("my_pipeline");
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/* adds a watch for new message on our pipeline's message bus to
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* the default GLib main context, which is the main context that our
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* GLib main loop is attached to below
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*/
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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bus_watch_id = gst_bus_add_watch (bus, my_bus_callback, NULL);
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gst_object_unref (bus);
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/* [...] */
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/* create a mainloop that runs/iterates the default GLib main context
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* (context NULL), in other words: makes the context check if anything
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* it watches for has happened. When a message has been posted on the
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* bus, the default main context will automatically call our
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* my_bus_callback() function to notify us of that message.
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* The main loop will be run until someone calls g_main_loop_quit()
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*/
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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/* clean up */
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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g_source_remove (bus_watch_id);
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g_main_loop_unref (loop);
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return 0;
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}
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