[XviD-devel] [PATCH] Some patches on the queue for CVS

[Edouard Gomez]

Hey hey,

Here is a list of patches that i commited to my branch but
that are waiting a bit for CVS pushing, because someone here
may object.

These patches aim at:
 - having faster decoding for halfpel bvop for SIMD
   platforms (C is ~just the same speed)
   Speedup is like 12%, 15%
 - having only one code path for qpel using skal's framework
   even for C (this obsoletes part of the PPC port which will
   now use more C code again). This patch requires skal's
   approval to license his code uner GPL (i'm waiting for his
   anwser)
 - use the same trick for qpel bvops as for halfpel bvops...
   The speedup is not so great, read my comment in the
   changelog entry.

For more details about the patches, you can visit
http://archzoom.sourcecontrol.net/demo/ed.gomez@free.fr--2004-1/xvidcore--head--0.0

patches need first to be mirrored by the sourcecontrol.net
daemon so maybe you'll have to wait a bit.

I'm open to any suggestion/objection.

-----------------------8<-------------------------------------
2004-08-01 13:38:36 GMT		patch-67

    Summary:
      Faster bframe decoding (qpel this time)
    Revision:
      xvidcore--head--0.0--patch-67

    From ed.gomez:
     * Used the same trick as for halfpel bvops, merge backward
       interpolation and dst averaging steps.
    
    NB: i'm currently not able to say if it's a real speedup or not
        because my linux kernel uses a process scheduler gives great
        variance to results... so far i'm sure this isn't a slowdown
        neither for C nor ia32 SIMD.

    modified files:
     src/decoder.c src/image/qpel.c src/image/qpel.h


2004-08-01 11:24:07 GMT		patch-66

    Summary:
      Unified qpel code path for all platforms
    Revision:
      xvidcore--head--0.0--patch-66

    From ed.gomez and skal:
     * Unified qpel code path for all platforms. Next step is
       to fully exploit this code path to speedup qpel bframe
       decoding
    
    NB: this makes also ports life easier as they would not port
        obsoleted function sets...

    modified files:
     src/decoder.c src/image/interpolate8x8.h src/image/qpel.c
     src/image/qpel.h src/motion/motion_comp.c


2004-07-31 15:08:19 GMT		patch-65

    Summary:
      Faster bframe decoding.
    Revision:
      xvidcore--head--0.0--patch-65

    From ed.gomez and skal:
     * Faster direct/interpolated bvop blocks decoding for halfpel
       sequences. The trick is to compute and average directly with
       destination during one of the forward/backward interpolations.
       At this moment, this patch covers only halfpel decoding, the
       same trick is expected to be hacked for qpel.

    modified files:
     src/decoder.c src/image/interpolate8x8.c
     src/image/interpolate8x8.h
     src/image/x86_asm/interpolate8x8_mmx.asm
     src/image/x86_asm/interpolate8x8_xmm.asm src/xvid.c
-----------------------8<-------------------------------------

-- 
Edouard Gomez