[FFmpeg-devel] [PATCH] RoQ decoder 4:4:4 update

Eric Lasota riot
Tue Jun 5 00:43:00 CEST 2007

Michael Niedermayer wrote:

> what is the advantage of pre unpacking cells to 4:4:4 instead of doing
> it during rendering?

Readability, simplifies vector applications into block copies, 
represents codebook how it will be applied rather than how it's stored.

>> +typedef unsigned char roq_mb2[3][4];
>> +typedef unsigned char roq_mb4[3][16];
>> +typedef unsigned char roq_mb8[3][64];
> these do nothing but obfuscate the code

How so?

> reordering of functions

All of the prototyped functions were replaced.  Do you want them matched 
to the existing prototype order?

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