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baseparse: provide latency query support

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This commit is contained in:
Mark Nauwelaerts 2011-05-12 11:55:20 +02:00
parent 82a6cb39ae
commit af5061e943
2 changed files with 53 additions and 0 deletions
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49
libs/gst/base/gstbaseparse.c
View file

@ -241,6 +241,7 @@ struct _GstBaseParsePrivate
guint bitrate;
guint lead_in, lead_out;
GstClockTime lead_in_ts, lead_out_ts;
GstClockTime min_latency, max_latency;
gboolean discont;
gboolean flushing;
@ -3032,6 +3033,31 @@ gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
}
/**
* gst_base_parse_set_latency:
* @parse: a #GstBaseParse
* @min_latency: minimum parse latency
* @max_latency: maximum parse latency
*
* Sets the minimum and maximum (which may likely be equal) latency introduced
* by the parsing process. If there is such a latency, which depends on the
* particular parsing of the format, it typically corresponds to 1 frame duration.
*
* Since: 0.10.34
*/
void
gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
GstClockTime max_latency)
{
GST_OBJECT_LOCK (parse);
parse->priv->min_latency = min_latency;
parse->priv->max_latency = max_latency;
GST_OBJECT_UNLOCK (parse);
GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
GST_TIME_ARGS (max_latency));
}
static gboolean
gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
GstClockTime * duration)
@ -3192,6 +3218,29 @@ gst_base_parse_query (GstPad * pad, GstQuery * query)
}
break;
}
case GST_QUERY_LATENCY:
{
if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
gboolean live;
GstClockTime min_latency, max_latency;
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
GST_OBJECT_LOCK (parse);
/* add our latency */
if (min_latency != -1)
min_latency += parse->priv->min_latency;
if (max_latency != -1)
max_latency += parse->priv->max_latency;
GST_OBJECT_UNLOCK (parse);
gst_query_set_latency (query, live, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;

4
libs/gst/base/gstbaseparse.h
View file

@ -297,6 +297,10 @@ void gst_base_parse_set_frame_rate (GstBaseParse * parse,
guint lead_in,
guint lead_out);
void gst_base_parse_set_latency (GstBaseParse * parse,
GstClockTime min_latency,
GstClockTime max_latency);
gboolean gst_base_parse_convert_default (GstBaseParse * parse,
GstFormat src_format,
gint64 src_value,