[FFmpeg-devel] [PATCH v8 05/10] swscale/graph: add new high-level scaler dispatch mechanism

[Michael Niedermayer]

On Thu, Nov 21, 2024 at 02:19:27PM +0100, Niklas Haas wrote:
> From: Niklas Haas <git at haasn.dev>
> 
> 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 at haasn.dev>

should be ok

thx

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

Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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