[Ffmpeg-devel] Motion Compensation details needed
Sun Jun 25 01:52:41 CEST 2006
On Fri, Jun 23, 2006 at 10:18:36AM -0700, Mike Melanson wrote:
> Kostya wrote:
> > I currently work on P-frames and need to do motion compensation.
> > As I figured out it is done by call of ff_emulated_edge_mc() and pixel ops from DSPContext
> > Please tell how to use them and what operation to choose for halfpel/quarterpel and such.
> I don't know if you'll be able to just drop in the existing MC
> functions. You may have to add a new set of functions that use VC-1's
> fractional-pel coefficients. But I'm not a pro.
vc1 is a mess (no surprise here its MS design after all ...)
their bilinear mode with luma blocks seems to match
their bilinear mode with rounding for chroma blocks should match
their bilinear mode without rounding is not implemented though its
a matter of a 2 line change in dsputil.c to add it with the
put_h264_chroma_pixels_tab related macros
their bicubic filters arent implemented, though maybe wmv2_mspel*
could be helpfull somehow ...
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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