On Thu, Nov 19, 2015 at 11:48:53AM +0100, Clément Bœsch wrote: > From: Matthieu Bouron <matthieu.bou...@stupeflix.com> > > Signed-off-by: Matthieu Bouron <matthieu.bou...@stupeflix.com> > Signed-off-by: Clément Bœsch <clem...@stupeflix.com> > > --- > The function takes about 29ms with a 1080p source (testsrc2) on a > cortex-a8. Though, 16ms (more than half the time!) is spend in the vst2 > call. Any suggestion on how to speed up this? > > Also, the reference code seems to cause some kind of ringing, while our > ASM doesn't: > http://b.pkh.me/nv12-rgba-ref.png > http://b.pkh.me/nv12-rgba-neon.png > > Last, we noticed that the y_offset is scaled to 1<<9 for some reason we > couldn't figure out. Hopefully we're doing it correctly here. > --- > libswscale/arm/Makefile | 3 +- > libswscale/arm/swscale_unscaled.c | 62 +++++++++++++++ > libswscale/arm/yuv2rgb_neon.S | 162 > ++++++++++++++++++++++++++++++++++++++ > libswscale/swscale_unscaled.c | 4 +-
Applied with a little adjustment: we added the width%16 constraint. See comment in the commit for details. Thanks, -- Clément B.
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