RFC on gst-omx patches

[Christian König]

Hello everyone,

sorry that I spammed the list without further notice, those patches got 
out before I could compose a mail for them.

While working on open sourcing the UVD/VCE support for AMD Radeon 
hardware we implemented an OpenMAX based state tracker in mesa and 
additional to that made a few changes to gst-omx to better support our 
use case. The result are the following seven patches:

gstomxvideodec: fix multithreads negotiation problem
     This is a bugfix, please review and if approved apply upstream.

gstomxvideodec: remove dead code
gstomxvideodec: simplify _find_nearest_frame
gstomxvideoenc: simplify _find_nearest_frame
     Those are code cleanups which simplify the following patches to add 
new funtionality.

omx: improve tunneling support
omx: add tunneling support between decoder and encoders
gstomxvideoenc: implement scaling configuration support
     Those patches implement new functionality and are mostly a request 
for comments. Does they fit into the gst-omx design? etc...

Regards,
Christian.