[FFmpeg-devel] [PATCH v2] avcodec/libjxlenc: support negative linesizes

[Leo Izen]

On 1/30/24 09:46, Leo Izen wrote:
> libjxl doesn't support negative strides, but JPEG XL has an orientation
> flag inside the codestream. We can use this to work around the library
> limitation, by taking the absolute value of the negative row stride,
> sending the image up-side-down, and telling the library that the image
> has a vertical-flip orientation.
> 
> Signed-off-by: Leo Izen <leo.izen at gmail.com>
> ---

Changes from v1:

- constify uint8_t *data, per Andreas's request
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