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7 commits

Author SHA1 Message Date
Wim Taymans 21f57317bb video-chroma: optimize chroma subsampling a little 
Combine multiplies in 4x filters.
Rename conversion functions to make them nicer in orc.
Add ORC versions for various downsampling algorithms
Add unit test chroma resampler
 2014-11-06 13:08:42 +01:00
Wim Taymans 3f44aaf810 video-chroma: do h subsampling after v subsampling 
We only need to do the horizontal subsampling on 1 line if we do it
after vertical subsampling and we also avoid doing vertical subsampling
on unused pixels.
 2014-11-06 10:45:13 +01:00
Wim Taymans 6547985f27 video-chroma: fix typo 2014-10-29 16:26:10 +01:00
Wim Taymans e115e5059b video-chroma: improve 4x downsampling coefficients 2014-10-08 11:36:15 +02:00
Wim Taymans 8ac3dbc4f3 video-chroma: don't crash on NULL resamplers 
Make dummy resamplers for all cases and only execute the horizontal
resampler instead of crashing.

See https://bugzilla.gnome.org/show_bug.cgi?id=722742
 2014-01-23 10:45:00 +01:00
Wim Taymans 0c60f0daa4 video-chroma: add chroma resampler 
Add functions to up/downsample chroma in horizontal and vertical
directions. These functions work in-placeand are meant to be used on the
input/output of the pack/unpack functions.
 2013-05-27 11:05:07 +02:00
Wim Taymans b5de0552a5 video: move chroma functions to separate file 2013-05-27 11:05:06 +02:00