Stream-CCITT.h   [plain text]

//========================================================================
//
// Stream-CCITT.h
//
// Tables for CCITT Fax decoding.
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================

struct CCITTCode {
  short bits;
  short n;
};

#define ccittEOL -2

//------------------------------------------------------------------------
// 2D codes
//------------------------------------------------------------------------

#define twoDimPass   0
#define twoDimHoriz  1
#define twoDimVert0  2
#define twoDimVertR1 3
#define twoDimVertL1 4
#define twoDimVertR2 5
#define twoDimVertL2 6
#define twoDimVertR3 7
#define twoDimVertL3 8

// 1-7 bit codes
static CCITTCode twoDimTab1[128] = {
  {-1, -1}, {-1, -1},		        // 000000x
  {7, twoDimVertL3},		        // 0000010
  {7, twoDimVertR3},		        // 0000011
  {6, twoDimVertL2}, {6, twoDimVertL2},	// 000010x
  {6, twoDimVertR2}, {6, twoDimVertR2},	// 000011x
  {4, twoDimPass}, {4, twoDimPass},     // 0001xxx
    {4, twoDimPass}, {4, twoDimPass},
    {4, twoDimPass}, {4, twoDimPass},
    {4, twoDimPass}, {4, twoDimPass},
  {3, twoDimHoriz}, {3, twoDimHoriz},	// 001xxxx
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
    {3, twoDimHoriz}, {3, twoDimHoriz},
  {3, twoDimVertL1}, {3, twoDimVertL1},	// 010xxxx
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
    {3, twoDimVertL1}, {3, twoDimVertL1},
  {3, twoDimVertR1}, {3, twoDimVertR1},	// 011xxxx
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
    {3, twoDimVertR1}, {3, twoDimVertR1},
  {1, twoDimVert0}, {1, twoDimVert0},	// 1xxxxxx
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0},
    {1, twoDimVert0}, {1, twoDimVert0}
};

//------------------------------------------------------------------------
// white run lengths
//------------------------------------------------------------------------

// 11-12 bit codes (upper 7 bits are 0)
static CCITTCode whiteTab1[32] = {
  {-1, -1},					// 00000
  {12, ccittEOL},				// 00001
  {-1, -1}, {-1, -1},				// 0001x
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},	// 001xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},	// 010xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},	// 011xx
  {11, 1792}, {11, 1792},			// 1000x
  {12, 1984},					// 10010
  {12, 2048},					// 10011
  {12, 2112},					// 10100
  {12, 2176},					// 10101
  {12, 2240},					// 10110
  {12, 2304},					// 10111
  {11, 1856}, {11, 1856},			// 1100x
  {11, 1920}, {11, 1920},			// 1101x
  {12, 2368},					// 11100
  {12, 2432},					// 11101
  {12, 2496},					// 11110
  {12, 2560}					// 11111
};

// 1-9 bit codes
static CCITTCode whiteTab2[512] = {
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},	// 0000000xx
  {8, 29}, {8, 29},				// 00000010x
  {8, 30}, {8, 30},				// 00000011x
  {8, 45}, {8, 45},				// 00000100x
  {8, 46}, {8, 46},				// 00000101x
  {7, 22}, {7, 22}, {7, 22}, {7, 22},		// 0000011xx
  {7, 23}, {7, 23}, {7, 23}, {7, 23},		// 0000100xx
  {8, 47}, {8, 47},				// 00001010x
  {8, 48}, {8, 48},				// 00001011x
  {6, 13}, {6, 13}, {6, 13}, {6, 13},		// 000011xxx
    {6, 13}, {6, 13}, {6, 13}, {6, 13},
  {7, 20}, {7, 20}, {7, 20}, {7, 20},		// 0001000xx
  {8, 33}, {8, 33},				// 00010010x
  {8, 34}, {8, 34},				// 00010011x
  {8, 35}, {8, 35},				// 00010100x
  {8, 36}, {8, 36},				// 00010101x
  {8, 37}, {8, 37},				// 00010110x
  {8, 38}, {8, 38},				// 00010111x
  {7, 19}, {7, 19}, {7, 19}, {7, 19},		// 0001100xx
  {8, 31}, {8, 31},				// 00011010x
  {8, 32}, {8, 32},				// 00011011x
  {6, 1}, {6, 1}, {6, 1}, {6, 1},		// 000111xxx
    {6, 1}, {6, 1}, {6, 1}, {6, 1},
  {6, 12}, {6, 12}, {6, 12}, {6, 12},		// 001000xxx
    {6, 12}, {6, 12}, {6, 12}, {6, 12},
  {8, 53}, {8, 53},				// 00100100x
  {8, 54}, {8, 54},				// 00100101x
  {7, 26}, {7, 26}, {7, 26}, {7, 26},		// 0010011xx
  {8, 39}, {8, 39},				// 00101000x
  {8, 40}, {8, 40},				// 00101001x
  {8, 41}, {8, 41},				// 00101010x
  {8, 42}, {8, 42},				// 00101011x
  {8, 43}, {8, 43},				// 00101100x
  {8, 44}, {8, 44},				// 00101101x
  {7, 21}, {7, 21}, {7, 21}, {7, 21},		// 0010111xx
  {7, 28}, {7, 28}, {7, 28}, {7, 28},		// 0011000xx
  {8, 61}, {8, 61},				// 00110010x
  {8, 62}, {8, 62},				// 00110011x
  {8, 63}, {8, 63},				// 00110100x
  {8, 0}, {8, 0},				// 00110101x
  {8, 320}, {8, 320},				// 00110110x
  {8, 384}, {8, 384},				// 00110111x
  {5, 10}, {5, 10}, {5, 10}, {5, 10},		// 00111xxxx
    {5, 10}, {5, 10}, {5, 10}, {5, 10},
    {5, 10}, {5, 10}, {5, 10}, {5, 10},
    {5, 10}, {5, 10}, {5, 10}, {5, 10},
  {5, 11}, {5, 11}, {5, 11}, {5, 11},		// 01000xxxx
    {5, 11}, {5, 11}, {5, 11}, {5, 11},
    {5, 11}, {5, 11}, {5, 11}, {5, 11},
    {5, 11}, {5, 11}, {5, 11}, {5, 11},
  {7, 27}, {7, 27}, {7, 27}, {7, 27},		// 0100100xx
  {8, 59}, {8, 59},				// 01001010x
  {8, 60}, {8, 60},				// 01001011x
  {9, 1472},					// 010011000
  {9, 1536},					// 010011001
  {9, 1600},					// 010011010
  {9, 1728},					// 010011011
  {7, 18}, {7, 18}, {7, 18}, {7, 18},		// 0100111xx
  {7, 24}, {7, 24}, {7, 24}, {7, 24},		// 0101000xx
  {8, 49}, {8, 49},				// 01010010x
  {8, 50}, {8, 50},				// 01010011x
  {8, 51}, {8, 51},				// 01010100x
  {8, 52}, {8, 52},				// 01010101x
  {7, 25}, {7, 25}, {7, 25}, {7, 25},		// 0101011xx
  {8, 55}, {8, 55},				// 01011000x
  {8, 56}, {8, 56},				// 01011001x
  {8, 57}, {8, 57},				// 01011010x
  {8, 58}, {8, 58},				// 01011011x
  {6, 192}, {6, 192}, {6, 192}, {6, 192},	// 010111xxx
    {6, 192}, {6, 192}, {6, 192}, {6, 192},
  {6, 1664}, {6, 1664}, {6, 1664}, {6, 1664},	// 011000xxx
    {6, 1664}, {6, 1664}, {6, 1664}, {6, 1664},
  {8, 448}, {8, 448},				// 01100100x
  {8, 512}, {8, 512},				// 01100101x
  {9, 704},					// 011001100
  {9, 768},					// 011001101
  {8, 640}, {8, 640},				// 01100111x
  {8, 576}, {8, 576},				// 01101000x
  {9, 832},					// 011010010
  {9, 896},					// 011010011
  {9, 960},					// 011010100
  {9, 1024},					// 011010101
  {9, 1088},					// 011010110
  {9, 1152},					// 011010111
  {9, 1216},					// 011011000
  {9, 1280},					// 011011001
  {9, 1344},					// 011011010
  {9, 1408},					// 011011011
  {7, 256}, {7, 256}, {7, 256}, {7, 256},	// 0110111xx
  {4, 2}, {4, 2}, {4, 2}, {4, 2},		// 0111xxxxx
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
    {4, 2}, {4, 2}, {4, 2}, {4, 2},
  {4, 3}, {4, 3}, {4, 3}, {4, 3},		// 1000xxxxx
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
    {4, 3}, {4, 3}, {4, 3}, {4, 3},
  {5, 128}, {5, 128}, {5, 128}, {5, 128},	// 10010xxxx
    {5, 128}, {5, 128}, {5, 128}, {5, 128},
    {5, 128}, {5, 128}, {5, 128}, {5, 128},
    {5, 128}, {5, 128}, {5, 128}, {5, 128},
  {5, 8}, {5, 8}, {5, 8}, {5, 8},		// 10011xxxx
    {5, 8}, {5, 8}, {5, 8}, {5, 8},
    {5, 8}, {5, 8}, {5, 8}, {5, 8},
    {5, 8}, {5, 8}, {5, 8}, {5, 8},
  {5, 9}, {5, 9}, {5, 9}, {5, 9},		// 10100xxxx
    {5, 9}, {5, 9}, {5, 9}, {5, 9},
    {5, 9}, {5, 9}, {5, 9}, {5, 9},
    {5, 9}, {5, 9}, {5, 9}, {5, 9},
  {6, 16}, {6, 16}, {6, 16}, {6, 16},		// 101010xxx
    {6, 16}, {6, 16}, {6, 16}, {6, 16},
  {6, 17}, {6, 17}, {6, 17}, {6, 17},		// 101011xxx
    {6, 17}, {6, 17}, {6, 17}, {6, 17},
  {4, 4}, {4, 4}, {4, 4}, {4, 4},		// 1011xxxxx
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
    {4, 4}, {4, 4}, {4, 4}, {4, 4},
  {4, 5}, {4, 5}, {4, 5}, {4, 5},		// 1100xxxxx
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
    {4, 5}, {4, 5}, {4, 5}, {4, 5},
  {6, 14}, {6, 14}, {6, 14}, {6, 14},		// 110100xxx
    {6, 14}, {6, 14}, {6, 14}, {6, 14},
  {6, 15}, {6, 15}, {6, 15}, {6, 15},		// 110101xxx
    {6, 15}, {6, 15}, {6, 15}, {6, 15},
  {5, 64}, {5, 64}, {5, 64}, {5, 64},		// 11011xxxx
    {5, 64}, {5, 64}, {5, 64}, {5, 64},
    {5, 64}, {5, 64}, {5, 64}, {5, 64},
    {5, 64}, {5, 64}, {5, 64}, {5, 64},
  {4, 6}, {4, 6}, {4, 6}, {4, 6},		// 1110xxxxx
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
    {4, 6}, {4, 6}, {4, 6}, {4, 6},
  {4, 7}, {4, 7}, {4, 7}, {4, 7},		// 1111xxxxx
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7},
    {4, 7}, {4, 7}, {4, 7}, {4, 7}
};

//------------------------------------------------------------------------
// black run lengths
//------------------------------------------------------------------------

// 10-13 bit codes (upper 6 bits are 0)
static CCITTCode blackTab1[128] = {
  {-1, -1}, {-1, -1},					// 000000000000x
  {12, ccittEOL}, {12, ccittEOL},			// 000000000001x
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000001xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000010xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000011xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000100xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000101xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000110xx
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 00000000111xx
  {11, 1792}, {11, 1792}, {11, 1792}, {11, 1792},	// 00000001000xx
  {12, 1984}, {12, 1984},				// 000000010010x
  {12, 2048}, {12, 2048},				// 000000010011x
  {12, 2112}, {12, 2112},				// 000000010100x
  {12, 2176}, {12, 2176},				// 000000010101x
  {12, 2240}, {12, 2240},				// 000000010110x
  {12, 2304}, {12, 2304},				// 000000010111x
  {11, 1856}, {11, 1856}, {11, 1856}, {11, 1856},	// 00000001100xx
  {11, 1920}, {11, 1920}, {11, 1920}, {11, 1920},	// 00000001101xx
  {12, 2368}, {12, 2368},				// 000000011100x
  {12, 2432}, {12, 2432},				// 000000011101x
  {12, 2496}, {12, 2496},				// 000000011110x
  {12, 2560}, {12, 2560},				// 000000011111x
  {10, 18}, {10, 18}, {10, 18}, {10, 18},		// 0000001000xxx
    {10, 18}, {10, 18}, {10, 18}, {10, 18},
  {12, 52}, {12, 52},					// 000000100100x
  {13, 640},						// 0000001001010
  {13, 704},						// 0000001001011
  {13, 768},						// 0000001001100
  {13, 832},						// 0000001001101
  {12, 55}, {12, 55},					// 000000100111x
  {12, 56}, {12, 56},					// 000000101000x
  {13, 1280},						// 0000001010010
  {13, 1344},						// 0000001010011
  {13, 1408},						// 0000001010100
  {13, 1472},						// 0000001010101
  {12, 59}, {12, 59},					// 000000101011x
  {12, 60}, {12, 60},					// 000000101100x
  {13, 1536},						// 0000001011010
  {13, 1600},						// 0000001011011
  {11, 24}, {11, 24}, {11, 24}, {11, 24},		// 00000010111xx
  {11, 25}, {11, 25}, {11, 25}, {11, 25},		// 00000011000xx
  {13, 1664},						// 0000001100100
  {13, 1728},						// 0000001100101
  {12, 320}, {12, 320},					// 000000110011x
  {12, 384}, {12, 384},					// 000000110100x
  {12, 448}, {12, 448},					// 000000110101x
  {13, 512},						// 0000001101100
  {13, 576},						// 0000001101101
  {12, 53}, {12, 53},					// 000000110111x
  {12, 54}, {12, 54},					// 000000111000x
  {13, 896},						// 0000001110010
  {13, 960},						// 0000001110011
  {13, 1024},						// 0000001110100
  {13, 1088},						// 0000001110101
  {13, 1152},						// 0000001110110
  {13, 1216},						// 0000001110111
  {10, 64}, {10, 64}, {10, 64}, {10, 64},		// 0000001111xxx
    {10, 64}, {10, 64}, {10, 64}, {10, 64}
};

// 7-12 bit codes (upper 4 bits are 0)
static CCITTCode blackTab2[192] = {
  {8, 13}, {8, 13}, {8, 13}, {8, 13},			// 00000100xxxx
    {8, 13}, {8, 13}, {8, 13}, {8, 13},
    {8, 13}, {8, 13}, {8, 13}, {8, 13},
    {8, 13}, {8, 13}, {8, 13}, {8, 13},
  {11, 23}, {11, 23},					// 00000101000x
  {12, 50},						// 000001010010
  {12, 51},						// 000001010011
  {12, 44},						// 000001010100
  {12, 45},						// 000001010101
  {12, 46},						// 000001010110
  {12, 47},						// 000001010111
  {12, 57},						// 000001011000
  {12, 58},						// 000001011001
  {12, 61},						// 000001011010
  {12, 256},						// 000001011011
  {10, 16}, {10, 16}, {10, 16}, {10, 16},		// 0000010111xx
  {10, 17}, {10, 17}, {10, 17}, {10, 17},		// 0000011000xx
  {12, 48},						// 000001100100
  {12, 49},						// 000001100101
  {12, 62},						// 000001100110
  {12, 63},						// 000001100111
  {12, 30},						// 000001101000
  {12, 31},						// 000001101001
  {12, 32},						// 000001101010
  {12, 33},						// 000001101011
  {12, 40},						// 000001101100
  {12, 41},						// 000001101101
  {11, 22}, {11, 22},					// 00000110111x
  {8, 14}, {8, 14}, {8, 14}, {8, 14},			// 00000111xxxx
    {8, 14}, {8, 14}, {8, 14}, {8, 14},
    {8, 14}, {8, 14}, {8, 14}, {8, 14},
    {8, 14}, {8, 14}, {8, 14}, {8, 14},
  {7, 10}, {7, 10}, {7, 10}, {7, 10},			// 0000100xxxxx
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
    {7, 10}, {7, 10}, {7, 10}, {7, 10},
  {7, 11}, {7, 11}, {7, 11}, {7, 11},			// 0000101xxxxx
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
    {7, 11}, {7, 11}, {7, 11}, {7, 11},
  {9, 15}, {9, 15}, {9, 15}, {9, 15},			// 000011000xxx
    {9, 15}, {9, 15}, {9, 15}, {9, 15},
  {12, 128},						// 000011001000
  {12, 192},						// 000011001001
  {12, 26},						// 000011001010
  {12, 27},						// 000011001011
  {12, 28},						// 000011001100
  {12, 29},						// 000011001101
  {11, 19}, {11, 19},					// 00001100111x
  {11, 20}, {11, 20},					// 00001101000x
  {12, 34},						// 000011010010
  {12, 35},						// 000011010011
  {12, 36},						// 000011010100
  {12, 37},						// 000011010101
  {12, 38},						// 000011010110
  {12, 39},						// 000011010111
  {11, 21}, {11, 21},					// 00001101100x
  {12, 42},						// 000011011010
  {12, 43},						// 000011011011
  {10, 0}, {10, 0}, {10, 0}, {10, 0},			// 0000110111xx
  {7, 12}, {7, 12}, {7, 12}, {7, 12},			// 0000111xxxxx
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12},
    {7, 12}, {7, 12}, {7, 12}, {7, 12}
};

// 2-6 bit codes
static CCITTCode blackTab3[64] = {
  {-1, -1}, {-1, -1}, {-1, -1}, {-1, -1},		// 0000xx
  {6, 9},						// 000100
  {6, 8},						// 000101
  {5, 7}, {5, 7},					// 00011x
  {4, 6}, {4, 6}, {4, 6}, {4, 6},			// 0010xx
  {4, 5}, {4, 5}, {4, 5}, {4, 5},			// 0011xx
  {3, 1}, {3, 1}, {3, 1}, {3, 1},			// 010xxx
    {3, 1}, {3, 1}, {3, 1}, {3, 1},
  {3, 4}, {3, 4}, {3, 4}, {3, 4},			// 011xxx
    {3, 4}, {3, 4}, {3, 4}, {3, 4},
  {2, 3}, {2, 3}, {2, 3}, {2, 3},			// 10xxxx
    {2, 3}, {2, 3}, {2, 3}, {2, 3},
    {2, 3}, {2, 3}, {2, 3}, {2, 3},
    {2, 3}, {2, 3}, {2, 3}, {2, 3},
  {2, 2}, {2, 2}, {2, 2}, {2, 2},			// 11xxxx
    {2, 2}, {2, 2}, {2, 2}, {2, 2},
    {2, 2}, {2, 2}, {2, 2}, {2, 2},
    {2, 2}, {2, 2}, {2, 2}, {2, 2}
};