Hey guys!
As most of you know that i have already started the attempt to
implement some of the ideas of Kai, which he has put as tickets on
http://projects.collabora.co.uk/farsight/ . I have stared with
ticekt#5 (Codec independent playout buffer element) or rtpjitterbuffer
(a name me and Kai agreed on). This element is mostly about moving the
jitter-buffer from the basertpdepayload into a new element with some
'codec independent' functionalities added.
While writing the element, i came accross a problem:
basertpdepayload uses a variable 'clock-rate' for deciding the amount
of time a packet remains in the buffer/queue. This variable is
codec-dependent and it's value is provided by the elements inheriting
from basertpdepayload.
I discussed with burger about this issue and we decided that we
need to have a number of sources (not in the sense of gstreamer) for
this value:
1. From caps set on the sink or src pad (we shouldn't care which
direction it came from)
2. From a static table, mapping payload-types to value of clock-rate.
This won't work for most of the codecs as they dont work on fixed
clock-rate.
3. From a property, so the pipeline owner (most likely the app.
developer) can do the magic for us.
I have already implemented all three mentioned above, haven't
built/tested it though. Kai pointed out that an event might be a
better idea than #1 above. Can anyone (burger?) comment on this
possibility?
--
Regards,
Zeeshan Ali
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