1. 15 Feb, 2012 1 commit
  2. 12 Jan, 2012 1 commit
    • Christophe GISQUET's avatar
      rv34: DC-only inverse transform · 3faa303a
      Christophe GISQUET authored
      When decoding coefficients, detect whether the block is DC-only, and take
      advantage of this knowledge to perform DC-only inverse transform.
      
      This is achieved by:
      - first, changing the 108x4 element modulo_three_table into a 108 element
        table (kind of base4), and accessing each value using mask and shifts.
      - then, checking low bits for 0 (as they represent the presence of higher
        frequency coefficients)
      
      Also provide x86 SIMD code for the DC-only inverse transform.
      Signed-off-by: 's avatarKostya Shishkov <kostya.shishkov@gmail.com>
      3faa303a
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