Documentation for create a src element

[Mateo Matachana López]

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Hi,

I am creating a GStreamer source element for get a live streaming from a
P2P network. I am stucked at one point.

My SrcObject inheritances from GstPushSrc as recomended on GStreamer
documentation for live sources.

I have implemented the _start, _query and _change_state functions where
I mostly do the setup of the protocol (contact the tracker, get the
media description, etc.) but I don't know how to pass the streamed
(received) data to the next GStreamer element.

How can I pass data to the next GStreamer element? Should I push the
data or GStreamer tolds the SrcObject when it should push data?

Are available some documentation where is explained in detail the
process of build a source element?

Thanks in advance,
Mateo Matachana
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[Tim-Philipp Müller-2]

On Sat, 2010-09-04 at 20:20 +0200, Mateo Matachana López wrote:

Hi,

> I have implemented the _start, _query and _change_state functions where
> I mostly do the setup of the protocol (contact the tracker, get the
> media description, etc.) but I don't know how to pass the streamed
> (received) data to the next GStreamer element.

It shouldn't be needed to implement/override GstElement::change_state(),
just implement GstBaseSrc::start() and ::stop() instead.


> How can I pass data to the next GStreamer element? Should I push the
> data or GStreamer tolds the SrcObject when it should push data?

You should implement GstPushSrc::create(), from where you can return
your buffer. (Note: not GstBaseSrc::create()).

Cheers
 -Tim


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