1. 13 Feb, 2017 1 commit
  2. 19 Dec, 2015 1 commit
    • Ganesh Ajjanagadde's avatar
      lavc/aacsbr: sbr_dequant optimization · def3c83e
      Ganesh Ajjanagadde authored
      This uses ff_exp2fi to get a speedup (~ 6x).
      
      sample benchmark (Haswell, GNU/Linux):
      old:
        19102 decicycles in sbr_dequant,    1023 runs,      1 skips
        19002 decicycles in sbr_dequant,    2045 runs,      3 skips
        17638 decicycles in sbr_dequant,    4093 runs,      3 skips
        15825 decicycles in sbr_dequant,    8189 runs,      3 skips
        16404 decicycles in sbr_dequant,   16379 runs,      5 skips
      
      new:
         3063 decicycles in sbr_dequant,    1024 runs,      0 skips
         3049 decicycles in sbr_dequant,    2048 runs,      0 skips
         2968 decicycles in sbr_dequant,    4096 runs,      0 skips
         2818 decicycles in sbr_dequant,    8191 runs,      1 skips
         2853 decicycles in sbr_dequant,   16383 runs,      1 skips
      Reviewed-by: 's avatarAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
      Signed-off-by: 's avatarGanesh Ajjanagadde <gajjanagadde@gmail.com>
      def3c83e
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