[FFmpeg-devel] [PATCH 01/13] lavc/jpeg2000dec: Finer granularity threading

[Anton Khirnov]

Quoting Tomas Härdin (2022-06-14 16:39:00)
> Patch 12 in this series is optional since it's just me getting the
> speed up on a specific machine
> 
> /Tomas
> 
> From 115aa26c343419e81c1b5ba0bfdb1615cbec27e9 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Tomas=20H=C3=A4rdin?= <git at haerdin.se>
> Date: Fri, 10 Jun 2022 14:10:02 +0200
> Subject: [PATCH 01/13] lavc/jpeg2000dec: Finer granularity threading
> 
> Decoding and dequant is now threaded on codeblock level.
> IDWT is threaded on component level.
> MCT and write_frame() remain threaded on tile level.
> 
> This brings lossless 4K J2K with -lowres 2 -thread_type slice -threads 96 on an AMD EPYC 7R32 from 4.8 fps (177% CPU) to 31 fps (1284% CPU).

Any measurable impact on single-threaded or frame-threaded decoding?

-- 
Anton Khirnov