static VALUE
latency_initialize(VALUE self, VALUE latency)
{
GstEvent *event;
event = gst_event_new_latency(NUM2ULL(latency));
G_INITIALIZE(self, event);
return Qnil;
}
static gboolean
gst_pipeline_do_latency (GstBin * bin)
{
GstPipeline *pipeline = GST_PIPELINE (bin);
GstQuery *query;
GstClockTime latency;
GstClockTime min_latency, max_latency;
gboolean res;
GST_OBJECT_LOCK (pipeline);
latency = pipeline->priv->latency;
GST_OBJECT_UNLOCK (pipeline);
if (latency == GST_CLOCK_TIME_NONE)
return GST_BIN_CLASS (parent_class)->do_latency (bin);
GST_DEBUG_OBJECT (pipeline, "querying latency");
query = gst_query_new_latency ();
if ((res = gst_element_query (GST_ELEMENT_CAST (pipeline), query))) {
gboolean live;
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (pipeline,
"got min latency %" GST_TIME_FORMAT ", max latency %"
GST_TIME_FORMAT ", live %d", GST_TIME_ARGS (min_latency),
GST_TIME_ARGS (max_latency), live);
if (max_latency < min_latency) {
/* this is an impossible situation, some parts of the pipeline might not
* work correctly. We post a warning for now. */
GST_ELEMENT_WARNING (pipeline, CORE, CLOCK, (NULL),
("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
GST_TIME_FORMAT ". Add queues or other buffering elements.",
GST_TIME_ARGS (max_latency), GST_TIME_ARGS (min_latency)));
}
if (latency < min_latency) {
/* This is a problematic situation as we will most likely drop lots of
* data if we configure a too low latency */
GST_ELEMENT_WARNING (pipeline, CORE, CLOCK, (NULL),
("Configured latency is lower than detected minimum latency: configured %"
GST_TIME_FORMAT " < min %" GST_TIME_FORMAT,
GST_TIME_ARGS (latency), GST_TIME_ARGS (min_latency)));
}
} else {
/* this is not a real problem, we just don't configure any latency. */
GST_WARNING_OBJECT (pipeline, "failed to query latency");
}
gst_query_unref (query);
/* configure latency on elements */
res =
gst_element_send_event (GST_ELEMENT_CAST (pipeline),
gst_event_new_latency (latency));
if (res) {
GST_INFO_OBJECT (pipeline, "configured latency of %" GST_TIME_FORMAT,
GST_TIME_ARGS (latency));
} else {
GST_WARNING_OBJECT (pipeline,
"did not really configure latency of %" GST_TIME_FORMAT,
GST_TIME_ARGS (latency));
}
return res;
}
