Modeled from the prores version. Clips to [0;1023] and is bitexact.
Bitexactness requires to add offsets in different places compared to
prores or C, and makes the function approximately 2% slower.
For 16 frames of a DNxHD 4:2:2 10bits test sequence:
C: 60861 decicycles in idct, 1048205 runs, 371 skips
sse2: 27567 decicycles in idct, 1048216 runs, 360 skips
avx: 26272 decicycles in idct, 1048171 runs, 405 skips
The add version is not implemented, so the corresponding dsp
function is set to NULL to make it clear in a code executing it.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Also add sse2 versions for both.
put_pixels_clamped port and sse2 version originally written by Timothy Gu.
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
* commit '84d173d3de97c753234ab0c0b50551d51413d663':
xvididct: Ensure that the scantable permutation is always set correctly
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit 'a786c8259dafeca9744252230b5d78f67810770c':
idct: Split off Xvid IDCT
Conflicts:
libavcodec/Makefile
libavcodec/mpeg4videodec.c
libavcodec/x86/Makefile
libavcodec/x86/idctdsp_init.c
This split is somewhat restructured leaving the xvid IDCT available
outside mpeg4 if manually selected.
The code also could not be merged unchanged as it conflicted with a
bugfix in FFmpeg
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit '5dcc201505f71b1e73e9eef12ce89d4eed252ad0':
simple_idct: Move x86-specific declarations to a header in the x86 directory
Conflicts:
libavcodec/x86/simple_idct.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
