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authorChristophe GISQUET <christophe.gisquet@gmail.com>2012-03-19 22:46:28 +0100
committerRonald S. Bultje <rsbultje@gmail.com>2012-04-10 10:06:48 -0700
commit272b252c0110225188c7d7f31167941210aac197 (patch)
tree47bea5996c88057a418e8872a655bac8f261736e /libavcodec/msrle.c
parentd3c59d5003a483f1a23e225fc71c19bd1116d11c (diff)
downloadffmpeg-272b252c0110225188c7d7f31167941210aac197.tar.gz
rv40dsp: implement prescaled versions for biweight.
Quite often, the original weights are multiple of 512. By prescaling them by 1/512 when they are computed (once per frame), no intermediate shifting is needed, and no prescaling on each call either. The x86 code already used that trick. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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