Files
ffmpeg/libavfilter
Niklas Haas bc8d06d541 avfilter/vf_thumbnail: unroll and use multiple histograms
This naive hist[p[x]]++ loop suffers badly when there are large regions of
identical values in the image, because of store-to-load forwarding delay.

Splitting up the histogram into four "parallel" histograms and processing
them one at a time speeds things up significantly, about 40% on my end.
2025-07-17 12:33:59 +02:00
..
2024-08-19 21:48:04 +02:00
2023-11-18 19:55:42 +01:00
2023-11-16 20:53:18 +02:00
2024-08-19 21:48:04 +02:00
2024-08-19 21:48:04 +02:00
2025-07-04 01:32:27 +02:00
2024-08-19 21:48:04 +02:00
2024-08-19 21:48:04 +02:00
2024-08-19 21:48:04 +02:00
2024-08-19 21:48:04 +02:00
2022-07-30 11:42:06 +02:00
2022-07-30 11:42:06 +02:00
2024-09-02 11:55:20 +02:00
2024-08-19 21:48:04 +02:00
2025-07-04 01:32:27 +02:00
2024-08-19 21:48:04 +02:00
2024-07-01 22:31:02 +02:00
2024-08-19 21:48:04 +02:00
2024-08-19 21:48:04 +02:00
2025-04-15 15:49:38 +02:00
2024-02-16 21:34:38 +01:00
2025-06-15 21:00:38 +05:30
2025-07-04 01:32:27 +02:00
2025-07-04 01:32:27 +02:00
2025-04-22 20:45:57 +02:00
2024-08-19 21:48:04 +02:00