+ split color conversion from scaling
- disabled gamma correction, until it's refactored too
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This simplifies allocating and initializing swscale contexts with custom options.
The function is internal currently but could be moved into the public header
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes out of array access
Fixes: case2_bad_read_yuv2rgbx32.mp4
Found-by: Michal Zalewski <lcamtuf@coredump.cx>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
* commit 'f84a1b597c29dc035b8d5529ef88c2d7ff057820':
swscale: support AV_PIX_FMT_YA16 as input
Conflicts:
libswscale/swscale_unscaled.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
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.
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.
* commit '92b099daf4b8ef93513e38b43899cb8458a2fde3':
swscale: support converting YVYU422 pixel format
Conflicts:
libswscale/input.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Both of these dithering methods are from http://pippin.gimp.org/a_dither/ for
GIF they can be considered better than bayer (provides more gray-levels), and
spatial stability - often more than twice as good compression and less visual
flicker than error diffusion methods (the methods also avoids error-shadow
artifacts of diffusion dithers).
These methods are similar to blue/green noise type dither masks; but are
simple enough to generate their mask on the fly. They are still research work
in progress; though more expensive to generate masks (which can be used in a
LUT) like 'void and cluster' and similar methods will yield superior results
* commit '1481d24c3a0abf81e1d7a514547bd5305232be30':
RGBA64 pixel formats
Conflicts:
doc/APIchanges
libavutil/pixdesc.c
libavutil/pixfmt.h
libavutil/version.h
libswscale/utils.c
See: 9569a3c9f4
See: 92afb43162, as well as others
Note: the enum values added in libav are incompatible/different to what ffmpeg used since 3 years
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit 'b4dd424d96f09f9bafb88e47f37df65dc4529143':
Remove all SPARC architecture optimizations
Conflicts:
Makefile
configure
libavcodec/sparc/dsputil_vis.c
libavcodec/sparc/dsputil_vis.h
libavcodec/sparc/hpeldsp_vis.c
libavcodec/sparc/simple_idct_vis.c
libavcodec/sparc/vis.h
libswscale/sparc/yuv2rgb_vis.c
libswscale/swscale_internal.h
If someone wants to maintain these (or other) SPARC optimizations, please
contact me or ffmpeg-devel.
I am happy to revert this removial if theres someone considering to
maintain this code.
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Aligning the tables reduces the amount of code generated on
e.g. ARM as the offset constant then has few enough set bits
so it can be encoded inside a single instruction instead of 2.
Ideally all should be declared aligned, but the DECLARE_ALIGNED
macros does not work with pointer tables, thus also reordered
the tables.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
* commit '1909f6b1b6da2db371c179bed5a19aaf979b7557':
swscale: cosmetics: Drop silly camelCase from swScale function pointer name
Conflicts:
libswscale/swscale_unscaled.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
