[Kdenlive-devel] Play position notification

[Rolf Dubitzky]

>From the renderer's point of view, it's no problem. The GUI then has to handle 
messages from the renderer which are not replys to requests. If that's easier 
for you let's make it so.

On Thursday 19 December 2002 01:04 pm, Jason Wood wrote:
> Hi,
>
> Ok, here is what I was going to say about the slider moving when a movie is
> being played :
>
> I think it should be the renderers job to tell the GUI it's current
> position, rather than the way that is currently in the VEML document where
> the GUI has to request it from the renderer.
>
> There are a number of advantages :
>
> 1. Less latency - the renderer sends the new position as soon as it is
> ready, so there is less delay than if the GUI is requesting at timed
> intervals. 2. Easier - The GUI doesn't need to keep track of when it should
> and shouldn't be requesting the current time from the renderer, the
> renderer doesn't need to wait for a request, it can send the time
> 3. More efficient - A new seek position will only be sent to the GUI when
> the time has changed.
> 4. No extra work, the socket interface we have can already handle it.
>
> Disadvantages:
>
> The only one I can think of is that the number of notifications sent is
> left entirely up to the renderer; if the renderer doesn't send any, the GUI
> never get's updated. On the other hand, I think the most likely reason why
> this would happen is if the renderer had crashed or been killed :-) so I
> don't think it is a major issue.
>
> What do you think?
>
> Cheers,
> Jason

-- 
Cheers,
Rolf

***************************************************************
 Rolf Dubitzky  
 e-mail: Rolf.Dubitzky at Physik.TU-Dresden.de
 s-mail see http://hep.phy.tu-dresden.de/~dubitzky/
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