vlc.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

  {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
  {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {ERROR, 0}
};

/* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
mpeg3_VLCtab_t mpeg3_DClumtab1[16] =
{ {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
  {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9}
};

/* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
mpeg3_VLCtab_t mpeg3_DCchromtab0[32] =
{ {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
  {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
  {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
  {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {ERROR, 0}
};

/* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
mpeg3_VLCtab_t mpeg3_DCchromtab1[32] =
{ {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
  {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
  {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
  {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
};

/* Table B-14, DCT coefficients table zero,
 * codes 0100 ... 1xxx (used for first (DC) coefficient)
 */
mpeg3_DCTtab_t mpeg3_DCTtabfirst[12] =
{
  {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
  {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
  {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
};

/* Table B-14, DCT coefficients table zero,
 * codes 0100 ... 1xxx (used for all other coefficients)
 */
mpeg3_DCTtab_t mpeg3_DCTtabnext[12] =
{
  {0,2,4},  {2,1,4},  {1,1,3},  {1,1,3},
  {64,0,2}, {64,0,2}, {64,0,2}, {64,0,2}, /* EOB */
  {0,1,2},  {0,1,2},  {0,1,2},  {0,1,2}
};

/* Table B-14, DCT coefficients table zero,
 * codes 000001xx ... 00111xxx
 */
mpeg3_DCTtab_t mpeg3_DCTtab0[60] =
{
  {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
  {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
  {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
  {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
  {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
  {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
  {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
  {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
  {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
  {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
  {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
  {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
  {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
};

/* Table B-15, DCT coefficients table one,
 * codes 000001xx ... 11111111
*/
mpeg3_DCTtab_t mpeg3_DCTtab0a[252] =
{
  {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
  {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
  {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
  {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
  {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
  {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
  {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
  {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
  {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
  {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
  {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
  {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
  {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4}, /* EOB */
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
  {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
  {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
  {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
  {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
  {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
  {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
  {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
  {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
};

/* Table B-14, DCT coefficients table zero,
 * codes 0000001000 ... 0000001111
 */
mpeg3_DCTtab_t mpeg3_DCTtab1[8] =
{
  {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
  {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
};

/* Table B-15, DCT coefficients table one,
 * codes 000000100x ... 000000111x
 */
mpeg3_DCTtab_t mpeg3_DCTtab1a[8] =
{
  {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
  {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
};

/* Table B-14/15, DCT coefficients table zero / one,
 * codes 000000010000 ... 000000011111
 */
mpeg3_DCTtab_t mpeg3_DCTtab2[16] =
{
  {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
  {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
  {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
  {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
};

/* Table B-14/15, DCT coefficients table zero / one,
 * codes 0000000010000 ... 0000000011111
 */
mpeg3_DCTtab_t mpeg3_DCTtab3[16] =
{
  {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
  {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
  {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
  {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
};

/* Table B-14/15, DCT coefficients table zero / one,
 * codes 00000000010000 ... 00000000011111
 */
mpeg3_DCTtab_t mpeg3_DCTtab4[16] =
{
  {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
  {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
  {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
  {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
};

/* Table B-14/15, DCT coefficients table zero / one,
 * codes 000000000010000 ... 000000000011111
 */
mpeg3_DCTtab_t mpeg3_DCTtab5[16] =
{
  {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
  {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
  {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
  {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
};

/* Table B-14/15, DCT coefficients table zero / one,
 * codes 0000000000010000 ... 0000000000011111
 */
mpeg3_DCTtab_t mpeg3_DCTtab6[16] =
{
  {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
  {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
  {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
  {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
};