From: Leo Izen <leo.izen@gmail.com>
To: FFmpeg Development <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v2] avcodec/libjxlenc: support negative linesizes
Date: Tue, 30 Jan 2024 09:46:58 -0500
Message-ID: <787c254d-8467-42ed-85b5-5a6134d8517f@gmail.com> (raw)
In-Reply-To: <20240130144608.54492-1-leo.izen@gmail.com>
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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@gmail.com>
> ---
Changes from v1:
- constify uint8_t *data, per Andreas's request
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next prev parent reply other threads:[~2024-01-30 14:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-30 14:46 Leo Izen
2024-01-30 14:46 ` Leo Izen [this message]
2024-01-30 14:57 ` Andreas Rheinhardt
2024-01-30 15:06 ` Leo Izen
2024-01-30 15:16 ` James Almer
2024-01-30 15:24 ` [FFmpeg-devel] [PATCH v3] " Leo Izen
2024-01-30 15:25 ` Leo Izen
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