This patch uses dithering in DITHER_COPY macro only if
it was not used option '-sws_dither none'.
With option '-sws_dither none' it uses downshift.

For human eye dithering is OK, for video codecs not necessarily.
If user don't want to use dithering, we should respect that.

Signed-off-by: Mateusz Brzostek <mateuszb@poczta.onet.pl>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Based on b4befca2 and 6b7849e6 by Paul B Mahol.

Fixes ticket #6608.

Avoid warnings about types mismatch and make the code a little simpler.

Based on 19be5fb7 by Luca Barbato.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

It is used to select functions that work with 9-15bits.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Libav, for some reason, merged this as a public API function. This will
aid in future merges.

A define is left for backwards compat, just in case some person
used it, since it is in a public header.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Fixes: 372d2df1f04b49e25f109f07f90b1505/asan_heap-oob_2835d2e_8501_99e0114d7ba3a6db885d0b4684d200c1.cine
Fixes out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: 372d2df1f04b49e25f109f07f90b1505/asan_heap-oob_2835d2e_8501_99e0114d7ba3a6db885d0b4684d200c1.cine
Fixes out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Signed-off-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>
Signed-off-by: Clément Bœsch <clement@stupeflix.com>

The new fields can be accessed directly and are more intelligible.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes fate/dds-rgb16 on big endian

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Only shift limited range luma, and always only shift chroma
for upconversion.

Based off a patch by Michael Niedermayer.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based on a long debug session with Kostya.

The rationale is that you have a packed format in form
<greyscale sample> <alpha sample> <greyscale sample> <alpha sample>
and shortening greyscale to 'G' might make one thing about Greenscale instead.
An alias pixel format and color space name are provided for compatibility.

Bug-Id: 772
CC: libav-stable@libav.org
Found-By: Justin Ruggles <justin.ruggles@gmail.com>
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Blackfin is a painful platform to work with, no test machines are available
and the range of multimedia applications is dubious. Thus it only represents
a maintenance burden.

Fixes Ticket3594
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes conversion of pal8 to rgb formats with alpha.

Updated references for 2 FATE tests which previously encoded fully
transparent images.

Based on a patch by Baptiste Coudurier <baptiste.coudurier@gmail.com>

Based on a patch by Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Anton Khirnov <anton@khirnov.net>