[h323plus] Behavior on VideoInputDevice

[Simon Horne]

Marcos

>codecs.h is a DirectShow/COM internal archive, full of IDL macros,
>don't be referenced direct. Seems VS ambiguous 'codec.h' from DShow
>and 'codec.h' in h323plus_2008.sln

The quick solution is to make sure the c++ include directory order has ptlib
and h323plus directory before the platform SDK. Going forward, the easiest
solution is to rename codec.h in h323plus.


> There is no "PWLIB_STATIC_LOAD_PLUGIN(DirectShow, PVideoInputDevice);"
>at the end of file. Probably source of out solutions projects can't
>find DirectShow PPluginDriver.

PWLIB_STATIC_LOAD_PLUGIN has been depreciated in the PTLib SVN for
PPLUGIN_STATIC_LOAD. The plugin loading is now centralised in videoio.h. I
will make this change so that directshow gets loaded.

Simon