[FFmpeg-devel] [PATCH] Moves yuv2yuvX_sse3 to yasm, unrolls main loop and other small optimizations for ~20% speedup.

[Michael Niedermayer]

On Thu, Jan 07, 2021 at 10:41:19AM +0100, Alan Kelly wrote:
> ---
>  Replaces mova with movdqu due to alignment issues
>  libswscale/x86/Makefile     |   1 +
>  libswscale/x86/swscale.c    | 106 +++++++++-----------------------
>  libswscale/x86/yuv2yuvX.asm | 117 ++++++++++++++++++++++++++++++++++++
>  tests/checkasm/sw_scale.c   |  98 ++++++++++++++++++++++++++++++
>  4 files changed, 246 insertions(+), 76 deletions(-)
>  create mode 100644 libswscale/x86/yuv2yuvX.asm

I have one / some ? cases where this changes output
 ./ffmpeg -i utvideo-yuv422p10le_UQY2_crc32-A431CD5F.avi -bitexact avi.avi
 
 i dont know if theres a decoder bug or bug in the patch or something else
 
-rw-r----- 1 michael michael 246218 Jan 10 16:23 avi.avi
-rw-r----- 1 michael michael 245824 Jan 10 16:23 avi-ref.avi

file should be at:
https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4044/

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In a rich man's house there is no place to spit but his face.
-- Diogenes of Sinope
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