[FFmpeg-devel] [PATCH] Faster CABAC H.264 residual decoding
Sun Apr 27 12:54:58 CEST 2008
matthieu castet <castet.matthieu at free.fr> writes:
> Jason Garrett-Glaser wrote:
>> On the advice of #ffmpeg-devel I have made a version with uint8_t
>> arrays instead of int.
> Don't forget that some cpu (arm for example) don't have native 8 bits
> operation. Everything is done in 32 bits, and 8 bits behavior is
> emulated with extra operation.
ARM has byte load and store instructions. All ALU operations are
32-bit, except for certain multiplies. I doubt this is a problem
The only recent CPU I know of that lacks byte load/store is the first
generation of the Alpha.
mans at mansr.com
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