[FFmpeg-devel] [PATCH v8 06/10] swscale: introduce new, dynamic scaling API

[Michael Niedermayer]

On Thu, Nov 21, 2024 at 02:19:28PM +0100, Niklas Haas wrote:
> From: Niklas Haas <git at haasn.dev>
> 
> As part of a larger, ongoing effort to modernize and partially rewrite
> libswscale, it was decided and generally agreed upon to introduce a new
> public API for libswscale. This API is designed to be less stateful, more
> explicitly defined, and considerably easier to use than the existing one.
> 
> Most of the API work has been already accomplished in the previous commits,
> this commit merely introduces the ability to use sws_scale_frame()
> dynamically, without prior sws_init_context() calls. Instead, the new API
> takes frame properties from the frames themselves, and the implementation is
> based on the new SwsGraph API, which we simply reinitialize as needed.
> 
> This high-level wrapper also recreates the logic that used to live inside
> vf_scale for scaling interlaced frames, enabling it to be reused more easily
> by end users.
> 
> Finally, this function is designed to simply copy refs directly when nothing
> needs to be done, substantially improving throughput of the noop fast path.
> 
> Sponsored-by: Sovereign Tech Fund
> Signed-off-by: Niklas Haas <git at haasn.dev>
> ---
>  libswscale/swscale.c          | 196 ++++++++++++++++++++++++++++++++--
>  libswscale/swscale.h          |  89 +++++++++++----
>  libswscale/swscale_internal.h |   9 +-
>  libswscale/utils.c            |   4 +
>  libswscale/x86/output.asm     |   2 +-
>  5 files changed, 271 insertions(+), 29 deletions(-)

should be ok

thx

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

The bravest are surely those who have the clearest vision
of what is before them, glory and danger alike, and yet
notwithstanding go out to meet it. -- Thucydides
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