[FFmpeg-devel] [PATCH 4/4] avfilter/vf_framerate: add SIMD functions for frame blending

[Marton Balint]

On Thu, 18 Jan 2018, Carl Eugen Hoyos wrote:

> 2018-01-18 1:03 GMT+01:00 Marton Balint <cus at passwd.hu>:
>> Blend function speedups on x86_64 Core i5 4460:
>>
>> ffmpeg -f lavfi -i allyuv -vf framerate=60:threads=1 -f null none
>>
>> C:     447548411 decicycles in Blend,    2048 runs,      0 skips
>> SSSE3: 130020087 decicycles in Blend,    2048 runs,      0 skips
>> AVX2:  128508221 decicycles in Blend,    2048 runs,      0 skips
>>
>> ffmpeg -f lavfi -i allyuv -vf format=yuv420p12,framerate=60:threads=1 -f null none
>>
>> C:     228932745 decicycles in Blend,    2048 runs,      0 skips
>> SSE4:  123357781 decicycles in Blend,    2048 runs,      0 skips
>> AVX2:  121215353 decicycles in Blend,    2048 runs,      0 skips
>
> Is the avx2 version really useful?

Well, it _is_ faster, even if the speedup is not significant. The ASM code 
is almost the same, so almost no maitenance burden is invovled in keeping 
both.

Regards,
Marton