[FFmpeg-devel] [PATCH]lsws/input: Do not change transparency range

[Carl Eugen Hoyos]

Am Sa., 15. Feb. 2020 um 20:21 Uhr schrieb Michael Niedermayer
<michaelni at gmx.at>:
>
> On Sat, Feb 15, 2020 at 10:10:45AM +0100, Carl Eugen Hoyos wrote:
> > Hi!
> >
> > Transparency levels are currently changed when reading bgra and
> > friends, this patch changes behaviour and fixes ticket #8509.
> >
> > Please comment, Carl Eugen
>
> >  libswscale/input.c                            |    6
> >  tests/ref/fate/ffmpeg-filter_colorkey         |   20 +-
> >  tests/ref/fate/filter-overlay-dvdsub-2397     |  180 +++++++++++++-------------
> >  tests/ref/fate/filter-overlay_gbrap_gbrap     |    2
> >  tests/ref/fate/filter-overlay_gbrp_gbrap      |    2
> >  tests/ref/fate/filter-overlay_yuv420_yuva420  |    2
> >  tests/ref/fate/filter-overlay_yuv422_yuva422  |    2
> >  tests/ref/fate/filter-overlay_yuv444_yuva444  |    2
> >  tests/ref/fate/filter-overlay_yuva420_yuva420 |    2
> >  tests/ref/fate/filter-overlay_yuva422_yuva422 |    2
> >  tests/ref/fate/filter-overlay_yuva444_yuva444 |    2
> >  11 files changed, 111 insertions(+), 111 deletions(-)
> > d8ed3bafeca2ed15b41a2fca0dc5600e3aeab671  0001-lsws-input-Do-not-change-transparency-range.patch
> > From a71053df9131be803d9a359a7232e5193747f351 Mon Sep 17 00:00:00 2001
> > From: Carl Eugen Hoyos <ceffmpeg at gmail.com>
> > Date: Sat, 15 Feb 2020 10:07:51 +0100
> > Subject: [PATCH] lsws/input: Do not change transparency range.
> >
> > Fixes ticket #8509.
> [...]
>
> > @@ -457,7 +457,7 @@ static void palToA_c(uint8_t *_dst, const uint8_t *src, const uint8_t *unused1,
> >      for (i=0; i<width; i++) {
> >          int d= src[i];
> >
> > -        dst[i]= (pal[d] >> 24)<<6;
> > +        dst[i]= (pal[d] >> 24)<<6 | pal[d]>>2;
>
> this looks wrong, theres a 24 missing in some form

New patch attached, thank you!

Carl Eugen
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