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  • Deb Mukherjee's avatar
    Reduce line buffer size for Wiener filter. · 22bbe4cc
    Deb Mukherjee authored
    This patch forces the vertical filtering for the top and bottom
    rows of a processing unit for the Wiener filter to be 5-tap.
    The 5-taps are derived from the primary 7-tap fitler by forcing
    the taps at the end to be zero, and absorbing their weights into
    the other taps to maintain normalization.
    This will effectively reduce the line buffer size for luma Wiener
    filter to 4 (from 6).
    Change-Id: I5e21b58369777eabf553a8987387d112f98a5598