On Tue, Jun 02, 2015 at 08:21:36PM +0200, Paul B Mahol wrote:
> On 6/2/15, Donny Yang <w...@kota.moe> wrote:
> > On 3 June 2015 at 03:38, Paul B Mahol <one...@gmail.com> wrote:
> >
> >> Dana 2. 6. 2015. 17:50 osoba "Donny Yang" <w...@kota.moe> napisala je:
> >> >
> >> > Signed-off-by: Donny Yang <w...@kota.moe>
> >> > ---
> >> > libavcodec/pngdec.c | 8 +++++++-
> >> > 1 file changed, 7 insertions(+), 1 deletion(-)
> >> >
> >> > diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
> >> > index 1f5c433..1667530 100644
> >> > --- a/libavcodec/pngdec.c
> >> > +++ b/libavcodec/pngdec.c
> >> > @@ -891,7 +891,8 @@ static int handle_p_frame_apng(AVCodecContext
> >> > *avctx,
> >> PNGDecContext *s,
> >> > return AVERROR(ENOMEM);
> >> >
> >> > if (s->blend_op == APNG_BLEND_OP_OVER &&
> >> > - avctx->pix_fmt != AV_PIX_FMT_RGBA) {
> >> > + avctx->pix_fmt != AV_PIX_FMT_RGBA &&
> >> > + avctx->pix_fmt != AV_PIX_FMT_GRAY8A) {
> >> > avpriv_request_sample(avctx, "Blending with pixel format %s",
> >> > av_get_pix_fmt_name(avctx->pix_fmt));
> >> > return AVERROR_PATCHWELCOME;
> >> > @@ -935,6 +936,11 @@ static int handle_p_frame_apng(AVCodecContext
> >> *avctx, PNGDecContext *s,
> >> > foreground_alpha = foreground[3];
> >> > background_alpha = background[3];
> >> > break;
> >> > +
> >> > + case AV_PIX_FMT_GRAY8A:
> >> > + foreground_alpha = foreground[1];
> >> > + background_alpha = background[1];
> >> > + break;
> >> > }
> >> >
> >> > if (foreground_alpha == 0)
> >> > --
> >> > 2.4.0
> >>
> >> Is there actual sample?
> >>
> >
> > I have not actually found an apng sample using gray8a, but this is
> > implemented through reading the spec and firefox's source and understanding
> > that gray8a is treated the same as rgba, just with less bytes.
> >
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel@ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >
>
> ok, patch lgtmthis doesnt apply cleanly without the prior patches so i cant apply it yet [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB When the tyrant has disposed of foreign enemies by conquest or treaty, and there is nothing more to fear from them, then he is always stirring up some war or other, in order that the people may require a leader. -- Plato
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