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aggregator: review code related to time level

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Add a comment for when the state matters. Use a local var for priv in
update_time_level() to improve readability. Move the our_latency local
var below the query results checks.
This commit is contained in:
Stefan Sauer 2017-10-17 08:03:02 +02:00 committed by Tim-Philipp Müller
parent 23692ee688
commit a083391fb5
1 changed files with 28 additions and 26 deletions
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54
libs/gst/base/gstaggregator.c
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@ -217,6 +217,9 @@ struct _GstAggregatorPadPrivate
GQueue data; /* buffers, events and queries */
GstBuffer *clipped_buffer;
guint num_buffers;
/* used to track fill state of queues, only used with live-src and when
* latency property is set to > 0 */
GstClockTime head_position;
GstClockTime tail_position;
GstClockTime head_time; /* running time */
@ -1317,38 +1320,37 @@ gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
static void
update_time_level (GstAggregatorPad * aggpad, gboolean head)
{
if (head) {
if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
aggpad->priv->head_segment.format == GST_FORMAT_TIME)
aggpad->priv->head_time =
gst_segment_to_running_time (&aggpad->priv->head_segment,
GST_FORMAT_TIME, aggpad->priv->head_position);
else
aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
GstAggregatorPadPrivate *priv = aggpad->priv;
if (!GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_time))
aggpad->priv->tail_time = aggpad->priv->head_time;
} else {
if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
aggpad->segment.format == GST_FORMAT_TIME)
aggpad->priv->tail_time =
gst_segment_to_running_time (&aggpad->segment,
GST_FORMAT_TIME, aggpad->priv->tail_position);
if (head) {
if (GST_CLOCK_TIME_IS_VALID (priv->head_position) &&
priv->head_segment.format == GST_FORMAT_TIME)
priv->head_time = gst_segment_to_running_time (&priv->head_segment,
GST_FORMAT_TIME, priv->head_position);
else
aggpad->priv->tail_time = aggpad->priv->head_time;
priv->head_time = GST_CLOCK_TIME_NONE;
if (!GST_CLOCK_TIME_IS_VALID (priv->tail_time))
priv->tail_time = priv->head_time;
} else {
if (GST_CLOCK_TIME_IS_VALID (priv->tail_position) &&
aggpad->segment.format == GST_FORMAT_TIME)
priv->tail_time = gst_segment_to_running_time (&aggpad->segment,
GST_FORMAT_TIME, priv->tail_position);
else
priv->tail_time = priv->head_time;
}
if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
aggpad->priv->time_level = 0;
if (priv->head_time == GST_CLOCK_TIME_NONE ||
priv->tail_time == GST_CLOCK_TIME_NONE) {
priv->time_level = 0;
return;
}
if (aggpad->priv->tail_time > aggpad->priv->head_time)
aggpad->priv->time_level = 0;
if (priv->tail_time > priv->head_time)
priv->time_level = 0;
else
aggpad->priv->time_level = aggpad->priv->head_time -
aggpad->priv->tail_time;
priv->time_level = priv->head_time - priv->tail_time;
}
@ -1716,8 +1718,6 @@ gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
gst_query_parse_latency (query, &live, &min, &max);
our_latency = self->priv->latency;
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
@ -1732,6 +1732,8 @@ gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
return FALSE;
}
our_latency = self->priv->latency;
self->priv->peer_latency_live = live;
self->priv->peer_latency_min = min;
self->priv->peer_latency_max = max;