On Fri, Aug 01, 2014 at 08:33:11PM +0200, Luca Barbato wrote:
> On 01/08/14 20:19, Vittorio Giovara wrote:
> > The decoder was producing different results when ASM was disabled.
> > Based on a long debug session with Kostya.
> > ---
> > libavcodec/pngdec.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
> > index 826edab..fa7f7cc 100644
> > --- a/libavcodec/pngdec.c
> > +++ b/libavcodec/pngdec.c
> > @@ -240,7 +240,7 @@ static void png_filter_row(PNGDSPContext *dsp, uint8_t
> > *dst, int filter_type,
> > p = last[i];
> > dst[i] = p + src[i];
> > }
> > - if (bpp > 1 && size > 4) {
> > + if (bpp > 2 && size > 4) {
> > /* would write off the end of the array if we let it process
> > * the last pixel with bpp=3 */
> > int w = bpp == 4 ? size : size - 3;
> >
>
> Ok.
Except for the message, which is wrong.
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