Hi, On Sun, Oct 14, 2012 at 12:53 PM, Ronald S. Bultje <rsbul...@gmail.com> wrote: > Hi, > > On Sat, Oct 13, 2012 at 11:13 PM, Ronald S. Bultje <rsbul...@gmail.com> wrote: >> Hi, >> >> On Sat, Oct 13, 2012 at 11:06 PM, Luca Barbato <lu_z...@gentoo.org> wrote: >>> --- >>> >>> Here an initial patch to support many yuva, apparently either I botched >>> adding them (since I did lots of cut and paste) or they manage the expose >>> some >>> flaws in swscale. valgrind manages to spot something and might be nice if >>> other people try this and see if the values for the fate-lavfi change after >>> each round. >> >> If this is what I think it is, search for YUVA420P in swscale and >> replace it with a generic alpha check. > > Oh I see now. > > swscale.c:661 > if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) > fillPlane(dst[3], dstStride[3], dstW, dstY - lastDstY, lastDstY, 255); > This only works for 8bit. For 9bit, you need a word fill with a value > of (1 << numbits) - 1.
Which actually leads to a question: does any of this exist in the real world? I've never, ever, ever seen an image with non-8bpc alpha planes. I hate to invent stuff that has no utility but does carry implementation burden. Ronald _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
