[x264-devel] [PATCH] SSE2 motion compensation [from before] +MMX/SSE2/SSSE3 frame_lowres_init

[nageshrelekar]

Can anybody tell me tht wht is the meaning of following block in H.264
specification. and How it is calculated


When residual_colour_transform_flag is equal to 1, the variable RY,ij is set
equal to rij with i, j = 0..3 and this

process is suspended until after completion of the residual colour transform
process as specified in

subclause 8.5.13, after the completion of which, the variable rij is set
equal to RG,ij with i, j = 0..3 and this process

is continued.

with out getting the values of Rcb and Rcr how can i calculate the RG

thanks in advance

regards

nagesh relekar

  -----Original Message-----
  From: x264-devel-bounces at videolan.org
[mailto:x264-devel-bounces at videolan.org]On Behalf Of Jason Garrett-Glaser
  Sent: Tuesday, March 04, 2008 4:02 PM
  To: Mailing list for x264 developers
  Subject: Re: [x264-devel] [PATCH] SSE2 motion compensation [from before]
+MMX/SSE2/SSSE3 frame_lowres_init


  Correction to my previous patch.  Line:

  +    for( x = 0; width - x >= 2; x++ )\

  should be

  +    for( ; width - x >= 2; x++ )\

  A quick test of the code yields:

  SSSE3: 2.23m clocks
  SSE2: 3.36m clocks
  MMX: 7.46m clocks
  Scalar/C: 7.5m clocks

  for 1280x720 input on a Core 2 Merom.

  Dark Shikari


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