[FFmpeg-devel] [PATCH] lavfi/hue: use lookup tables

[Paul B Mahol]

On 8/20/13, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Mon, Aug 19, 2013 at 08:50:44PM +0000, Paul B Mahol wrote:
>> On 8/19/13, Michael Niedermayer <michaelni at gmx.at> wrote:
>> > On Mon, Aug 19, 2013 at 08:28:14PM +0000, Paul B Mahol wrote:
>> >> On 8/19/13, Michael Niedermayer <michaelni at gmx.at> wrote:
>> >> > On Mon, Aug 19, 2013 at 07:12:04PM +0000, Paul B Mahol wrote:
>> >> >> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>> >> >> ---
>> >> >>  libavfilter/vf_hue.c | 76
>> >> >> +++++++++++++++++++++++++++++++---------------------
>> >> >>  1 file changed, 45 insertions(+), 31 deletions(-)
>> >> >
>> >> > breaks -vf hue=90
>> >> >
>> >> > also i dont see how this could work, rotation is not newu=f(oldu)
>> >>
>> >> obviously, i need bigger luts, but do you consider lut approach worth
>> >> it?
>> >
>> > if its faster sure, but iam not sure SIMD without LUT wont beat it
>>
>> shouldn't lut with SIMD be fastest?
>
> if theres a CPU and a architecture that has a fast multiple lookup
> instruction

The way how you said it, it appears there is none.