[Re: [tremor] [PATCH] significantly reduce Tremor ROM size requirement]

[timmy brolin]

I can't help you with thoose tables, but I have one suggestion for the bitrev tables.
Reversing the order of say eight bits is hard to do in software, but it's very easily done in hardware. The only thing required is 16 free I/O pins, and that's not a problem on most ARM CPU's.
I know, it only saves about 12kB rom space, and it's anything but portable, but still, if you happens to be on a tight system, every byte counts.

Timmy Brolin

<p>On Thu, Sep 05, 2002 at 12:50:07PM -0400, Nicolas Pitre wrote: 

If you can, say, halve the size of the table for any given block and demonstrate that the change does not affect S/N ("I'm sure it's OK" is not good enough), then that is a patch I'm interested in. However, 
the patch that will make me drop whFat I'Fm doing instantlFy is thFe one that substantially eliminates the tables without approximations. 

<p><p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'tremor-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.