[maemo-developers] using gstreamer in a hildon control panel applet

[From: Brandt, Todd E]

How would I ensure that any dialogs that I spawn in the child process
take on the hildon-desktop settings though? I already have two control
panel shortcuts that launch separate processes but both spawn dialogs
with different colors, fonts, and sizes than they would if they were
spawned in the library.

-----Original Message-----
From: Markku Vire [mailto:markku.vire at movial.fi] 
Sent: Wednesday, October 03, 2007 12:44 AM
To: Brandt, Todd E
Cc: maemo-developers at maemo.org
Subject: Re: using gstreamer in a hildon control panel applet


Hi,

Many Maemo applications are actually multi-threaded, since async
operations within GnomeVFS use threads internally.

Anyway, using GStreamer in control panel applet sounds dangerous. This
is because gstreamer cannot be unloaded cleanly (when execute-function
returns, your module is unloaded and gstreamer is unloaded as well).
Basically only very simple libraries (such that don't modify the main
process' memory) can be unloaded.

Perhaps you can implement your applet as a separate process and the
execute function of the applet just launches the child and waits it to
finish?

-Markku-

Brandt, Todd E wrote:
> Hi, I having a problem with hildon-control-panel and was wondering if
> someone could help me out?
> 
> Basically, I have a sound applet that sets up the audio devices for
the
> system, and it's designed as a library which is pulled up by the
> controlpanel process. It requires gstreamer to work, and the gstreamer
> documentation tells me that I have to either call gst_init or
> g_threat_init() *before* any other glib functions are called. But by
the
> time my execute function is called, it's too late.
> 
> Is there a way to initialize gstreamer from a hildon cp applet? Or do
I
> have to patch hildon-control-panel to call gst_init in its main
> function?
>