[Opera-Linux] video playback using the mplayerplugin succesor "Gecko media player" is broken due to a bug in Opera

[Kevin DeKorte]

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Eirik Byrkjeflot Anonsen wrote:

> Not necessarily.  There are certain parts of the mozilla plug-in
> interface we do not emulate.  The most important things being that
> we're not running a gtk main loop, and we don't implement XUL, XPCOM
> or anything built on top of that.  At least some plug-ins depend on
> these things (mplayer plug-in used to depend on gtk.)
> 
> I haven't been keeping an eye on the mozilla plug-in interface, so I
> don't know if they still recommend making plug-ins depend on gtk.  I'm
> pretty sure they used to do so.
> 
> eirik

Actually, I know that gtk is not the toolkit you should be using when
developing a cross browser plugin. In mplayerplug-in X mode was
developed for this purpose, and X mode would have been dropped if not
for the Opera users of it begging for it. The example plugin I gave does
not have anything but X in it I believe so all the events in it should work.

With gecko-mediaplayer, there is no widget toolkit in the plugin at all.
As part of the design of it the gui was contained in the GNOME MPlayer
application and gecko-mediaplayer uses dbus to instruct gnome-mplayer
what to play and where to play it. Part of that instruction is to embed
gnome-mplayer in the window that Opera gives it via the SetWindow event.
Now if Opera destroys this window to soon then this causes all kinds of
problems.

I also took a look at the plugin code and and there is a block of code
called npp_gate.cpp. This code handles all the events like NPP_Destroy
and NPP_SetWindow. I believe everything is there that Opera expects.
After doing a little research is seems the shut call is called from
NPP_Destroy. So that is where that event is coming from.

Kevin


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