Ordered dithering

From Avisynth

http://www.virtualdub.org/blog/pivot/entry.php?id=151

http://en.wikipedia.org/wiki/Ordered_dithering

http://www.visgraf.impa.br/Courses/ip00/proj/Dithering1/ordered_dithering.html

http://forum.doom9.org/showthread.php?p=1509153#post1509153

dither maps:

__declspec(align(64)) static const BYTE ditherMap[256] = {
#if 0
  // default 0231 recursed table
  0x00, 0x80, 0x20, 0xA0,  0x08, 0x88, 0x28, 0xA8,  0x02, 0x82, 0x22, 0xA2,  0x0A, 0x8A, 0x2A, 0xAA,
  0xC0, 0x40, 0xE0, 0x60,  0xC8, 0x48, 0xE8, 0x68,  0xC2, 0x42, 0xE2, 0x62,  0xCA, 0x4A, 0xEA, 0x6A,
  0x30, 0xB0, 0x10, 0x90,  0x38, 0xB8, 0x18, 0x98,  0x32, 0xB2, 0x12, 0x92,  0x3A, 0xBA, 0x1A, 0x9A,
  0xF0, 0x70, 0xD0, 0x50,  0xF8, 0x78, 0xD8, 0x58,  0xF2, 0x72, 0xD2, 0x52,  0xFA, 0x7A, 0xDA, 0x5A,

  0x0C, 0x8C, 0x2C, 0xAC,  0x04, 0x84, 0x24, 0xA4,  0x0E, 0x8E, 0x2E, 0xAE,  0x06, 0x86, 0x26, 0xA6,
  0xCC, 0x4C, 0xEC, 0x6C,  0xC4, 0x44, 0xE4, 0x64,  0xCE, 0x4E, 0xEE, 0x6E,  0xC6, 0x46, 0xE6, 0x66,
  0x3C, 0xBC, 0x1C, 0x9C,  0x34, 0xB4, 0x14, 0x94,  0x3E, 0xBE, 0x1E, 0x9E,  0x36, 0xB6, 0x16, 0x96,
  0xFC, 0x7C, 0xDC, 0x5C,  0xF4, 0x74, 0xD4, 0x54,  0xFE, 0x7E, 0xDE, 0x5E,  0xF6, 0x76, 0xD6, 0x56,

  0x03, 0x83, 0x23, 0xA3,  0x0B, 0x8B, 0x2B, 0xAB,  0x01, 0x81, 0x21, 0xA1,  0x09, 0x89, 0x29, 0xA9,
  0xC3, 0x43, 0xE3, 0x63,  0xCB, 0x4B, 0xEB, 0x6B,  0xC1, 0x41, 0xE1, 0x61,  0xC9, 0x49, 0xE9, 0x69,
  0x33, 0xB3, 0x13, 0x93,  0x3B, 0xBB, 0x1B, 0x9B,  0x31, 0xB1, 0x11, 0x91,  0x39, 0xB9, 0x19, 0x99,
  0xF3, 0x73, 0xD3, 0x53,  0xFB, 0x7B, 0xDB, 0x5B,  0xF1, 0x71, 0xD1, 0x51,  0xF9, 0x79, 0xD9, 0x59,

  0x0F, 0x8F, 0x2F, 0xAF,  0x07, 0x87, 0x27, 0xA7,  0x0D, 0x8D, 0x2D, 0xAD,  0x05, 0x85, 0x25, 0xA5,
  0xCF, 0x4F, 0xEF, 0x6F,  0xC7, 0x47, 0xE7, 0x67,  0xCD, 0x4D, 0xED, 0x6D,  0xC5, 0x45, 0xE5, 0x65,
  0x3F, 0xBF, 0x1F, 0x9F,  0x37, 0xB7, 0x17, 0x97,  0x3D, 0xBD, 0x1D, 0x9D,  0x35, 0xB5, 0x15, 0x95,
  0xFF, 0x7F, 0xDF, 0x5F,  0xF7, 0x77, 0xD7, 0x57,  0xFD, 0x7D, 0xDD, 0x5D,  0xF5, 0x75, 0xD5, 0x55,
#else
  // improved "equal sum" modified table
  0x00, 0xB0, 0x60, 0xD0,  0x0B, 0xBB, 0x6B, 0xDB,  0x06, 0xB6, 0x66, 0xD6,  0x0D, 0xBD, 0x6D, 0xDD,
  0xC0, 0x70, 0x90, 0x20,  0xCB, 0x7B, 0x9B, 0x2B,  0xC6, 0x76, 0x96, 0x26,  0xCD, 0x7D, 0x9D, 0x2D,
  0x30, 0x80, 0x50, 0xE0,  0x3B, 0x8B, 0x5B, 0xEB,  0x36, 0x86, 0x56, 0xE6,  0x3D, 0x8D, 0x5D, 0xED,
  0xF0, 0x40, 0xA0, 0x10,  0xFB, 0x4B, 0xAB, 0x1B,  0xF6, 0x46, 0xA6, 0x16,  0xFD, 0x4D, 0xAD, 0x1D,

  0x0C, 0xBC, 0x6C, 0xDC,  0x07, 0xB7, 0x67, 0xD7,  0x09, 0xB9, 0x69, 0xD9,  0x02, 0xB2, 0x62, 0xD2,
  0xCC, 0x7C, 0x9C, 0x2C,  0xC7, 0x77, 0x97, 0x27,  0xC9, 0x79, 0x99, 0x29,  0xC2, 0x72, 0x92, 0x22,
  0x3C, 0x8C, 0x5C, 0xEC,  0x37, 0x87, 0x57, 0xE7,  0x39, 0x89, 0x59, 0xE9,  0x32, 0x82, 0x52, 0xE2,
  0xFC, 0x4C, 0xAC, 0x1C,  0xF7, 0x47, 0xA7, 0x17,  0xF9, 0x49, 0xA9, 0x19,  0xF2, 0x42, 0xA2, 0x12,

  0x03, 0xB3, 0x63, 0xD3,  0x08, 0xB8, 0x68, 0xD8,  0x05, 0xB5, 0x65, 0xD5,  0x0E, 0xBE, 0x6E, 0xDE,
  0xC3, 0x73, 0x93, 0x23,  0xC8, 0x78, 0x98, 0x28,  0xC5, 0x75, 0x95, 0x25,  0xCE, 0x7E, 0x9E, 0x2E,
  0x33, 0x83, 0x53, 0xE3,  0x38, 0x88, 0x58, 0xE8,  0x35, 0x85, 0x55, 0xE5,  0x3E, 0x8E, 0x5E, 0xEE,
  0xF3, 0x43, 0xA3, 0x13,  0xF8, 0x48, 0xA8, 0x18,  0xF5, 0x45, 0xA5, 0x15,  0xFE, 0x4E, 0xAE, 0x1E,

  0x0F, 0xBF, 0x6F, 0xDF,  0x04, 0xB4, 0x64, 0xD4,  0x0A, 0xBA, 0x6A, 0xDA,  0x01, 0xB1, 0x61, 0xD1,
  0xCF, 0x7F, 0x9F, 0x2F,  0xC4, 0x74, 0x94, 0x24,  0xCA, 0x7A, 0x9A, 0x2A,  0xC1, 0x71, 0x91, 0x21,
  0x3F, 0x8F, 0x5F, 0xEF,  0x34, 0x84, 0x54, 0xE4,  0x3A, 0x8A, 0x5A, 0xEA,  0x31, 0x81, 0x51, 0xE1,
  0xFF, 0x4F, 0xAF, 0x1F,  0xF4, 0x44, 0xA4, 0x14,  0xFA, 0x4A, 0xAA, 0x1A,  0xF1, 0x41, 0xA1, 0x11,
#endif
};


__declspec(align(16)) static const BYTE ditherMap4[16] = {
  0x0, 0xB, 0x6, 0xD,
  0xC, 0x7, 0x9, 0x2,
  0x3, 0x8, 0x5, 0xE,
  0xF, 0x4, 0xA, 0x1,
};