[vdr] Re: Help Requested from the Dxr3 plugin maker and others C/C++ coders

[Sascha Volkenandt <mailbot1@wat.willz.de>]

On Samstag, 8. März 2003 00:14 Philippe wrote:
> I was wondering if you can help me to build another plugin based on this
> card.
> I don't want you to write a specific plugin, I just need some
> informations :
>  - How can I start to write the device ?
>  - Which part of the code is mandatory to have the display (without OSD
> etc ...)
>  - ...

First of all - I only tried to write an output device myself once yet (which 
has never been finished), so I'm just trying to give some help here ;) Don't 
blame me if I'm incorrect ;)))

You need to create a cDevice-Derivation (your cEm84Device), which features the 
methods mentiones in PLUGINS.html (Section "Devices", subsection 
"Replaying"). Have a look at device.h for a brief description of what those 
are supposed to do and dvbdevice.[ch] to see how it is actually implemented.

You don't need to patch VDR code as your Device is recognized as a valid 
Output Device by VDR after it is loaded and Initialized (see PLUGINS.html, 
Section "Devices", subsection "Initializing new devices").

For the OSD, your cEm84Device must feature cOsdBase *NewOsd(int,int), which 
has to return at least some kind of dummy OSD, because VDR doesn't accept a 
Primary- (that is the output-)Device without OSD capabilities.

Greetings,
Sascha Volkenandt


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