mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-21 07:46:38 +00:00
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
#include <gst/gst.h>
|
|
|
|
static GMainLoop *loop;
|
|
|
|
static gboolean
|
|
my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
|
|
{
|
|
g_print ("Got %s message\n", GST_MESSAGE_TYPE_NAME (message));
|
|
|
|
switch (GST_MESSAGE_TYPE (message)) {
|
|
case GST_MESSAGE_ERROR:{
|
|
GError *err;
|
|
gchar *debug;
|
|
|
|
gst_message_parse_error (message, &err, &debug);
|
|
g_print ("Error: %s\n", err->message);
|
|
g_error_free (err);
|
|
g_free (debug);
|
|
|
|
g_main_loop_quit (loop);
|
|
break;
|
|
}
|
|
case GST_MESSAGE_EOS:
|
|
/* end-of-stream */
|
|
g_main_loop_quit (loop);
|
|
break;
|
|
default:
|
|
/* unhandled message */
|
|
break;
|
|
}
|
|
|
|
/* we want to be notified again the next time there is a message
|
|
* on the bus, so returning TRUE (FALSE means we want to stop watching
|
|
* for messages on the bus and our callback should not be called again)
|
|
*/
|
|
return TRUE;
|
|
}
|
|
|
|
gint
|
|
main (gint argc, gchar * argv[])
|
|
{
|
|
GstElement *pipeline;
|
|
GstBus *bus;
|
|
guint bus_watch_id;
|
|
|
|
/* init */
|
|
gst_init (&argc, &argv);
|
|
|
|
/* create pipeline, add handler */
|
|
pipeline = gst_pipeline_new ("my_pipeline");
|
|
|
|
/* adds a watch for new message on our pipeline's message bus to
|
|
* the default GLib main context, which is the main context that our
|
|
* GLib main loop is attached to below
|
|
*/
|
|
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
|
|
bus_watch_id = gst_bus_add_watch (bus, my_bus_callback, NULL);
|
|
gst_object_unref (bus);
|
|
|
|
/* [...] */
|
|
|
|
/* create a mainloop that runs/iterates the default GLib main context
|
|
* (context NULL), in other words: makes the context check if anything
|
|
* it watches for has happened. When a message has been posted on the
|
|
* bus, the default main context will automatically call our
|
|
* my_bus_callback() function to notify us of that message.
|
|
* The main loop will be run until someone calls g_main_loop_quit()
|
|
*/
|
|
loop = g_main_loop_new (NULL, FALSE);
|
|
g_main_loop_run (loop);
|
|
|
|
/* clean up */
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
gst_object_unref (pipeline);
|
|
g_source_remove (bus_watch_id);
|
|
g_main_loop_unref (loop);
|
|
|
|
return 0;
|
|
}
|