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authorNiklas Haas <git@haasn.dev>2024-10-10 16:39:20 +0200
committerNiklas Haas <git@haasn.dev>2024-11-25 11:02:16 +0100
commitbf738412e849bcb8c63a330dfb814281b3d97f6b (patch)
treeaa8e89710e86bf1b2a375cf09cd09c302226d8f5 /tests/ref/lavf/zip1.gbrapf32le.exr
parentc461dcf2910bd5062f4cfad6bfa3e240c9cc9a3c (diff)
downloadffmpeg-bf738412e849bcb8c63a330dfb814281b3d97f6b.tar.gz
swscale/graph: add new high-level scaler dispatch mechanism
This interface has been designed from the ground up to serve as a new framework for dispatching various scaling operations at a high level. This will eventually replace the old ad-hoc system of using cascaded contexts, as well as allowing us to plug in more dynamic scaling passes requiring intermediate steps, such as colorspace conversions, etc. The starter implementation merely piggybacks off the existing sws_init() and sws_scale(), functions, though it does bring the immediate improvement of splitting up cascaded functions and pre/post conversion functions into separate filter passes, which allows them to e.g. be executed in parallel even when the main scaler is required to be single threaded. Additionally, a dedicated (multi-threaded) noop memcpy pass substantially improves throughput of that fast path. Follow-up commits will eventually expand this to move all of the scaling decision logic into the graph init function, and also eliminate some of the current special cases. Sponsored-by: Sovereign Tech Fund Signed-off-by: Niklas Haas <git@haasn.dev>
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