• Deb Mukherjee's avatar
    Add variance based mode/skipping · 8b3faccb
    Deb Mukherjee authored
    Adds a speed feature to skip all intra modes other than
    DC_PRED if the source variance is small. This feature is
    made part of speed 1 and up.
    
    Results on derf300: psnr -0.07%, speedup about 1-2%
    
    Also uses the source variance to fine-tune the early
    termination criteria when FLAG_EARLY_TERMINATE is on.
    This feature is made part of speed 2 and up.
    
    Results on derf300: psnr -0.52%, speedup about 5-7%
    
    Change-Id: I59e38aa836557cfa5405ae706fc64815cbfe4232
    8b3faccb