gst_base_src_query_latency 1030 libs/gst/base/gstbasesrc.c       res = gst_base_src_query_latency (src, &live, &min, &max);
gst_base_src_query_latency  249 libs/gst/base/gstbasesrc.h gboolean        gst_base_src_query_latency    (GstBaseSrc *src, gboolean * live,