[FFmpeg-devel] [PATCH] avcodec/vvc decode: ALF filtering without CC-ALF

[Nuo Mi]

On Wed, Dec 4, 2024 at 5:20 AM Chris Warrington via ffmpeg-devel <
ffmpeg-devel at ffmpeg.org> wrote:

> Nuo Mi wrote:
> > This will introduce two writes for all blocks, even if there is no CC
> ALF.
> How about checking the sps_ccalf_enabled_flag in ff_vvc_alf_filter?
>
> That makes sense too, but I'd think you'd need to check both
> sps_ccalf_enabled_flag and the slice header
> sh_alf_cc_cb_enabled_flag/sh_alf_cc_cr_enabled_flag or the similar picture
> header values.

No, it's not needed. If sps_ccalf_enabled_flag is true, all ctb_cc_idc
values will be initialized.

>

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