[XviD-devel] qpel matrices

[Christoph Nägeli]

Hi,

Perhaps you know, I'm currently porting the new patches from Edouard to 
altivec and I got some questions about the qpel code (qpel.c) which 
some of you may answer I think.


About the definition of the FIR_Tab_16 (and perhaps FIR_Tab_8, too. I'm 
not yet coding the '8 routines'):

This Matrix is defined with elements of int32_t though they range just 
from -7 to 23 so would it be possible to declare it using int8_t or 
will they change in the future? That way I could load one line per 
vector which leads to the next question. Is there an easy way to create 
these values on the fly so I don't have to fetch them from a global 
variable? I don't see any easy trick to generate though in qpel.c, 
there are tables allocated for mmx which aren't hardcoded so I think 
they will be generated on the fly (I don't understand x86 assembly so I 
can't see myself).


--
Christoph