[FFmpeg-devel] avcodec/utvideoenc : add SIMD (SSSE3) for sub_left_pred

[Michael Niedermayer]

On Thu, Jan 11, 2018 at 09:45:07PM +0100, Martin Vignali wrote:
> Hello,
> 
> in attach patch to add SIMD for sub_left_pred in utvideoenc
> 
> 001 : add SIMD for utvideoenc
> 002 : add checkasm for llviddspenc (diff bytes and sub_left_pred)
> 
> Encoding result :
> ./ffmpeg -i utvideo_file.avi -c:v utvideo -pred left res.avi
> 
> Without
> 
> frame= 3316 fps=194 q=-0.0 Lsize= 3613675kB time=00:02:12.64
> bitrate=223184.8kbits/s speed=7.74x
> 
> With
> frame= 3316 fps=206 q=-0.0 Lsize= 3613675kB time=00:02:12.64
> bitrate=223184.8kbits/s speed=8.24x
> 
> 
> Checkasm result :
> sub_left_predict_c: 2497.2
> sub_left_predict_ssse3: 455.7
> 
> 
> pass fate test for me (os X, x86_64)

this changes the output:
make -j12 && ./ffmpeg -i ~/videos/matrixbench_mpeg2.mpg -an -vcodec utvideo -t 1 -pix_fmt yuv420p -pred left  -t 1 test2.avi

-rw-r----- 1 michael michael 3744402 Jan 12 04:20 test2.avi
-rw-r----- 1 michael michael 3753358 Jan 12 04:19 test.avi


[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

When the tyrant has disposed of foreign enemies by conquest or treaty, and
there is nothing more to fear from them, then he is always stirring up
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