[gst-devel] Waiting for an event to reach the end of the pipeline

Christian Fredrik Kalager Schaller Uraeus at linuxrising.org
Fri Apr 11 09:04:13 CEST 2003

Hi Martin,
I think you should jump into #gstreamer in irc.freenode.net and talk to
taaz and wtay there, it would probably be easier for them to discuss it
with out there.


p.s. seems like some cool stuff you are doing here :)

On Mon, 2003-04-07 at 18:07, Martin Soto wrote:
> Hi all!
> In the last days, I've hacking the dvdnavsrc element to complete the
> support for the DVD menus.  Right now, it works more or less fine with
> my new components for the DXR3 card (coming soon to a SourceForge
> repository near you) but I still have a problem that looks quite
> difficult to solve.
> In order to implement the menu highlights I added a signal to the
> dvdnavsrc element.  I think that's the only way to implement it because
> of the out-of-band, interactive nature of the highlights.  In my
> application I attach to that signal and use the information to set the
> highlight in the element I wrote to control the DXR3's subpicture unit.
> This works great when using the menus interactively, but has problems
> when changing between menus.  Sometimes, the highlight signal fires
> before the video and subpicture information has made its way through the
> pipeline to the DXR3 output elements, and you end up with menus that
> look funny, to say the least.
> For that reason, I would need a way to send an event (like FLUSH or
> NEW_MEDIA) from the dvdnavsrc element, and then wait until it is
> received by all output elements (sound, video and spu).  So far, I can
> think of defining signals in the output elements that fire when such an
> event arrives, but that seems quite hackish and not very reliable.
> Is there a better way to solve this problem?
> Thanks,
> M. S.
Christian Fredrik Kalager Schaller <Uraeus at linuxrising.org>

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