[Ffmpeg-devel] [PATCH] ported SGI decoder to the new API

[Michael Niedermayer]

Hi

On Tue, Apr 03, 2007 at 08:09:35PM +0800, Xiaohui Sun wrote:
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> Michael Niedermayer wrote:
> > Hi
> > 
> > On Tue, Apr 03, 2007 at 12:46:36AM +0800, Xiaohui Sun wrote:
> >> I have updated the patch.
> > 
> [...]
> > 
> >> +            if (expand_rle_row(in_buf + start_offset, end_buf, dest_row,
> >> +                dest_row + s->linesize, z, s->depth) != s->width)
> >> +                return AVERROR_INVALIDDATA;
> > 
> > linesize can be negative
> 
> I am sorry but I am not quite clear about the meaning of negative
> linesize and found not much code/comment on it.
> I wonder if the linesize is negative, then the
> p->data[0] is the end address of the image buffer and the start address
>  is p->data[0] + (avctx->height - 1) * p->linesize[0]?

yes

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

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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