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#include <stdlib.h>
#include <gst/gst.h>
static void
event_loop (GstBus * bus, GstElement * pipe)
{
GstMessage *message = NULL;
while (TRUE) {
message = gst_bus_poll (bus, GST_MESSAGE_ANY, -1);
g_assert (message != NULL);
switch (message->type) {
case GST_MESSAGE_EOS:
g_message ("received EOS");
gst_message_unref (message);
return;
case GST_MESSAGE_WARNING:{
GError *gerror;
gchar *debug;
gst_message_parse_warning (message, &gerror, &debug);
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
gst_message_unref (message);
g_error_free (gerror);
g_free (debug);
break;
}
case GST_MESSAGE_ERROR:{
GError *gerror;
gchar *debug;
gst_message_parse_error (message, &gerror, &debug);
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
gst_message_unref (message);
g_error_free (gerror);
g_free (debug);
return;
}
default:
gst_message_unref (message);
break;
}
}
}
static GstBusSyncReply
sync_bus_handler (GstBus * bus, GstMessage * message, GstElement * bin)
{
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_STREAM_STATUS:
{
GstStreamStatusType type;
GstElement *owner;
const GValue *val;
gchar *path;
GstTask *task = NULL;
g_message ("received STREAM_STATUS");
gst_message_parse_stream_status (message, &type, &owner);
val = gst_message_get_stream_status_object (message);
g_message ("type: %d", type);
path = gst_object_get_path_string (GST_MESSAGE_SRC (message));
g_message ("source: %s", path);
g_free (path);
path = gst_object_get_path_string (GST_OBJECT (owner));
g_message ("owner: %s", path);
g_free (path);
g_message ("object: type %s, value %p", G_VALUE_TYPE_NAME (val),
g_value_get_object (val));
/* see if we know how to deal with this object */
if (G_VALUE_TYPE (val) == GST_TYPE_TASK) {
task = g_value_get_object (val);
}
switch (type) {
case GST_STREAM_STATUS_TYPE_CREATE:
g_message ("created task %p", task);
break;
case GST_STREAM_STATUS_TYPE_ENTER:
if (task) {
g_message ("raising task priority for %p", task);
gst_task_set_priority (task, G_THREAD_PRIORITY_HIGH);
}
break;
case GST_STREAM_STATUS_TYPE_LEAVE:
break;
default:
break;
}
break;
}
default:
break;
}
/* pass all messages on the async queue */
return GST_BUS_PASS;
}
int
main (int argc, char *argv[])
{
GstElement *bin, *fakesrc, *fakesink;
GstBus *bus;
gst_init (&argc, &argv);
/* create a new bin to hold the elements */
bin = gst_pipeline_new ("pipeline");
g_assert (bin);
/* create a source */
fakesrc = gst_element_factory_make ("fakesrc", "fakesrc");
g_assert (fakesrc);
g_object_set (fakesrc, "num-buffers", 50, NULL);
/* and a sink */
fakesink = gst_element_factory_make ("fakesink", "fakesink");
g_assert (fakesink);
/* add objects to the main pipeline */
gst_bin_add_many (GST_BIN (bin), fakesrc, fakesink, NULL);
/* link the elements */
gst_element_link (fakesrc, fakesink);
/* get the bus, we need to install a sync handler */
bus = gst_pipeline_get_bus (GST_PIPELINE (bin));
gst_bus_set_sync_handler (bus, (GstBusSyncHandler) sync_bus_handler, bin);
/* start playing */
gst_element_set_state (bin, GST_STATE_PLAYING);
/* Run event loop listening for bus messages until EOS or ERROR */
event_loop (bus, bin);
/* stop the bin */
gst_element_set_state (bin, GST_STATE_NULL);
gst_object_unref (bus);
exit (0);
}
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