[FFmpeg-cvslog] r17548 - in trunk/libavcodec: pixdesc.c pixdesc.h

[Andreas Öman]

michael wrote:
> Author: michael
> Date: Tue Feb 24 02:08:29 2009
> New Revision: 17548
> 
> Log:
> Pixel Format descriptor, try #1.
> (yes its intentionally unused, this is intended as a basis for further
>  work, and to prevent repeation of the whole discussion dying and the
>  results being forgotten)
> 
> Added:
>    trunk/libavcodec/pixdesc.c
>    trunk/libavcodec/pixdesc.h
> 
> Added: trunk/libavcodec/pixdesc.c
> ==============================================================================
> --- /dev/null	00:00:00 1970	(empty, because file is newly added)
> +++ trunk/libavcodec/pixdesc.c	Tue Feb 24 02:08:29 2009	(r17548)
> +    /**
> +     * Amount to shift the luma width right to find the chroma width, this is for
> +     * example 1 for YV12
> +     * chroma_width = -((-luma_width )>>log2_chroma_w)
> +     * note above is needed to ensure rounding up
> +     */
> +    uint8_t log2_chroma_w;      ///< chroma_width = -((-luma_width )>>log2_chroma_w)

Would it make sense to have this conversion available as a macro?