M_SQRT2 is defined in math.h, or in avutil/mathematics.h for
compatibility hacks. This uses this value instead of a floating literal.
Fixed point values produced by C_FIX(), R_FIX() remain identical.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
omse goes from 0.03060703 (which fails for dct-test) to 0.01663750.
This also actually improve the error of decoding the sample generated
by fate-vsynth3-dnxhd1080i-10bit using simple_idct10 to FAANI, which
goes (when resampled to yuv422p) from:
stddev: 0.06 PSNR: 72.28 MAXDIFF: 1
to identical.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Results of IDCT can by far outreach the range of ff_cropTbl[], leading
to overreads and potentially crashes.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.
Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.
Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
Neither the asm() nor the __asm__() keyword is part of the C99
standard, but while GCC accepts the former in C89 syntax, it is not
accepted in C99 unless GNU extensions are turned on (with -fasm). The
latter form is accepted in any syntax as an extension (without
requiring further command-line options).
Sun Studio C99 compiler also does not accept asm() while accepting
__asm__(), albeit reporting warnings that it's not valid C99 syntax.
Originally committed as revision 15627 to svn://svn.ffmpeg.org/ffmpeg/trunk
4mv+b frames encoding finally fixed
chroma ME
5 comparission functions for ME
b frame encoding speedup
wmv2 codec (unfinished)
user specified diamond size for EPZS
Originally committed as revision 1365 to svn://svn.ffmpeg.org/ffmpeg/trunk
Rullgård <mru@users.sourceforge.net>.
I've left out the idctCol2 part, because W4 has recently been decreed
to be 16383, and also I doubt it will give a noticeable speedup.
Originally committed as revision 1029 to svn://svn.ffmpeg.org/ffmpeg/trunk
test simple-idct and ijg int DCT too
do tests with random & sparse matrixes
print systematic error matrixes
Originally committed as revision 892 to svn://svn.ffmpeg.org/ffmpeg/trunk
code duplication, I'm currently working on the put/add variants, but I
did not get them to be as fast as the old method yet...
Originally committed as revision 703 to svn://svn.ffmpeg.org/ffmpeg/trunk
Michael Niedermayer
Diego Biurrun
Ganesh Ajjanagadde
Christophe Gisquet
Michael Niedermayer
Ronald S. Bultje
Mans Rullgard
Aurelien Jacobs
Diego Pettenò
Kostya Shishkov
Zdenek Kabelac
Falk Hüffner
Fabrice Bellard
Felix Bünemann