vlc.h

来自「实现在linux下的mpeg4编解码」· C头文件 代码 · 共 1,026 行 · 第 1/2 页

#ifndef _VLC_H_
#define _VLC_H_

/* type definitions for variable length code table entries */

typedef struct
{
  U_Int code; /* right justified */
  Int len;
} VLCtable;


/* DC prediction sizes */

 static VLCtable DCtab_lum[13] =
{
  {3,3}, {3,2}, {2,2}, {2,3}, {1,3}, {1,4}, {1,5}, {1,6}, {1,7},
  {1,8}, {1,9}, {1,10}, {1,11}
}; 

 static VLCtable DCtab_chrom[13] =
{
  {3,2}, {2,2}, {1,2}, {1,3}, {1,4}, {1,5}, {1,6}, {1,7}, {1,8},
  {1,9}, {1,10}, {1,11}, {1,12}
}; 


 /* Motion vectors */

 static VLCtable mvtab[33] =
{
  {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7},
  {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10},
  {12,10}, {11,10}, {10,10}, {9,10}, {8,10}, {7,10}, {6,10}, {5,10},
  {4,10}, {7,11}, {6,11}, {5,11}, {4,11}, {3,11}, {2,11}, {3,12},
  {2,12}
};


/* MCBPC Indexing by cbpc in first two bits, mode in last two.
 CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10.
 Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */

static VLCtable mcbpc_intra_tab[15] =
{
  {0x01,9}, {0x01,1}, {0x01,4}, {0x00,0},
  {0x00,0}, {0x01,3}, {0x01,6}, {0x00,0},
  {0x00,0}, {0x02,3}, {0x02,6}, {0x00,0},
  {0x00,0}, {0x03,3}, {0x03,6}
};


/* MCBPC inter.
   Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */

static VLCtable mcbpc_inter_tab[29] =
{
  {1,1}, {3,3}, {2,3}, {3,5}, {4,6}, {1,9}, {0,0}, {0,0},
  {3,4}, {7,7}, {5,7}, {4,8}, {4,9}, {0,0}, {0,0}, {0,0},
  {2,4}, {6,7}, {4,7}, {3,8}, {3,9}, {0,0}, {0,0}, {0,0},
  {5,6}, {5,9}, {5,8}, {3,7}, {2,9}
};

static VLCtable mcbpc_sprite_tab[31] =
{
  {1,1}, {0,12}, {2,3}, {3,5}, {4,6}, {3,3}, {12,4}, {1,9},
  {3,4}, {1,12}, {5,7}, {4,8}, {4,9}, {7,7}, {12,5}, {0,0},
  {2,4}, {2,12}, {4,7}, {3,8}, {3,9}, {6,7}, {12,6}, {0,0},
  {5,6}, {3,12}, {5,8}, {3,7}, {2,9}, {5,9}, {12,7}
};

/* MODB table, MW 18-MAY-1998 */

 static VLCtable modb_tab[3] =
{
  {1,1}, {1,2}, {0,2}
}; 

#if 0
/* MCBPC for separate mode */

static VLCtable mcbpc_sep_tab[9] =
{
    {1,1}, {1,3}, {2,3}, {3,3}, {1,4}, {1,6}, {2,6}, {3,6}, {1,9}
};
#endif

/* CBPY. Straightforward indexing */

static VLCtable cbpy_tab[16] =
{
  {3,4}, {5,5}, {4,5}, {9,4}, {3,5}, {7,4}, {2,6}, {11,4},
  {2,5}, {3,6}, {5,4}, {10,4}, {4,4}, {8,4}, {6,4}, {3,2}
};

static VLCtable cbpy_tab3[8] = 
  {
    {3,3},{1,6},{1,5},{2,3},{2,5},{3,5},{1,3},{1,1}
  };
static VLCtable cbpy_tab2[4] = 
  {
    {1,4},{1,3},{1,2},{1,1}
  }; 


/* DCT coefficients. Four tables, two for last = 0, two for last = 1.
   the sign bit must be added afterwards. */

/* first part of coeffs for last = 0. Indexed by [run][level-1] */

static VLCtable coeff_tab0[2][12] =
{
  /* run = 0 */
  {
    {0x02, 2}, {0x0f, 4}, {0x15, 6}, {0x17, 7},
    {0x1f, 8}, {0x25, 9}, {0x24, 9}, {0x21,10},
    {0x20,10}, {0x07,11}, {0x06,11}, {0x20,11}
  },
  /* run = 1 */
  {
    {0x06, 3}, {0x14, 6}, {0x1e, 8}, {0x0f,10},
    {0x21,11}, {0x50,12}, {0x00, 0}, {0x00, 0},
    {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  }
};

/* rest of coeffs for last = 0. indexing by [run-2][level-1] */

static VLCtable coeff_tab1[25][4] =
{
  /* run = 2 */
  {
    {0x0e, 4}, {0x1d, 8}, {0x0e,10}, {0x51,12}
  },
  /* run = 3 */
  {
    {0x0d, 5}, {0x23, 9}, {0x0d,10}, {0x00, 0}
  },
  /* run = 4-26 */
  {
    {0x0c, 5}, {0x22, 9}, {0x52,12}, {0x00, 0}
  },
  {
    {0x0b, 5}, {0x0c,10}, {0x53,12}, {0x00, 0}
  },
  {
    {0x13, 6}, {0x0b,10}, {0x54,12}, {0x00, 0}
  },
  {
    {0x12, 6}, {0x0a,10}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x11, 6}, {0x09,10}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x10, 6}, {0x08,10}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x16, 7}, {0x55,12}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x15, 7}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x14, 7}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1c, 8}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1b, 8}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x21, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x20, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1f, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1e, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1d, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1c, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1b, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x1a, 9}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x22,11}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x23,11}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x56,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  },
  {
    {0x57,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}
  }
};

/* first coeffs of last = 1. indexing by [run][level-1] */

static VLCtable coeff_tab2[2][3] =
{
  /* run = 0 */
  {
    {0x07, 4}, {0x19, 9}, {0x05,11}
  },
  /* run = 1 */
  {
    {0x0f, 6}, {0x04,11}, {0x00, 0}
  }
};

/* rest of coeffs for last = 1. indexing by [run-2] */

static VLCtable coeff_tab3[40] =
{
  {0x0e, 6}, {0x0d, 6}, {0x0c, 6},
  {0x13, 7}, {0x12, 7}, {0x11, 7}, {0x10, 7},
  {0x1a, 8}, {0x19, 8}, {0x18, 8}, {0x17, 8},
  {0x16, 8}, {0x15, 8}, {0x14, 8}, {0x13, 8},
  {0x18, 9}, {0x17, 9}, {0x16, 9}, {0x15, 9},    
  {0x14, 9}, {0x13, 9}, {0x12, 9}, {0x11, 9},    
  {0x07,10}, {0x06,10}, {0x05,10}, {0x04,10},    
  {0x24,11}, {0x25,11}, {0x26,11}, {0x27,11},    
  {0x58,12}, {0x59,12}, {0x5a,12}, {0x5b,12},    
  {0x5c,12}, {0x5d,12}, {0x5e,12}, {0x5f,12},
  {0x00, 0}               
};

/* New tables for Intra luminance coefficients. Same codewords,
   different meaning */

/* Coeffs for last = 0, run = 0. Indexed by [level-1] */

static VLCtable coeff_tab4[27] =
{
    /* run = 0 */
    {0x02, 2}, {0x06, 3}, {0x0f, 4}, {0x0d, 5},
    {0x0c, 5}, {0x15, 6}, {0x13, 6}, {0x12, 6}, 
    {0x17, 7}, {0x1f, 8}, {0x1e, 8}, {0x1d, 8},
    {0x25, 9}, {0x24, 9}, {0x23, 9}, {0x21, 9},
    {0x21,10}, {0x20,10}, {0x0f,10}, {0x0e,10},
    {0x07,11}, {0x06,11}, {0x20,11}, {0x21,11},
    {0x50,12}, {0x51,12}, {0x52,12}
};

/* Coeffs for last = 0, run = 1. Indexed by [level-1] */

static VLCtable coeff_tab5[10] =
{
    {0x0e, 4}, {0x14, 6}, {0x16, 7}, {0x1c, 8},
    {0x20, 9}, {0x1f, 9}, {0x0d,10}, {0x22,11},
    {0x53,12}, {0x55,12}
};

/* Coeffs for last = 0, run = 2 -> 9. Indexed by [run-2][level-1] */

static VLCtable coeff_tab6[8][5] =
{
    /* run = 2 */
    {
	{0x0b, 5}, {0x15, 7}, {0x1e, 9}, {0x0c,10},
	{0x56,12}
    },
    /* run = 3 */
    {
	{0x11, 6}, {0x1b, 8}, {0x1d, 9}, {0x0b,10},
	{0x00, 0}
    },
    /* run = 4 */
    {
	{0x10, 6}, {0x22, 9}, {0x0a,10}, {0x00, 0},
	{0x00, 0}
    },
    /* run = 5 */
    {
	{0x0d, 6}, {0x1c, 9}, {0x08,10}, {0x00, 0},
	{0x00, 0}
    },
    /* run = 6 */
    {
	{0x12, 7}, {0x1b, 9}, {0x54,12}, {0x00, 0},
	{0x00, 0}
    },
    /* run = 7 */
    {
	{0x14, 7}, {0x1a, 9}, {0x57,12}, {0x00, 0},
	{0x00, 0}
    },
    /* run = 8 */
    {
	{0x19, 8}, {0x09,10}, {0x00, 0}, {0x00, 0},
	{0x00, 0}
    },
    /* run = 9 */
    {
	{0x18, 8}, {0x23,11}, {0x00, 0}, {0x00, 0},
	{0x00, 0}
    }
};

/* Coeffs for last = 0, run = 10 -> 14. Indexed by [run-10] */

static VLCtable coeff_tab7[5] =
{
    {0x17, 8}, {0x19, 9}, {0x18, 9}, {0x07,10},
    {0x58,12}
};

/* Coeffs for last = 1, run = 0. Indexed by [level-1] */

static VLCtable coeff_tab8[8] =
{
    {0x07, 4}, {0x0c, 6}, {0x16, 8}, {0x17, 9},
    {0x06,10}, {0x05,11}, {0x04,11}, {0x59,12}
};

/* Coeffs for last = 1, run = 1 -> 6. Indexed by [run-1][level-1] */

static VLCtable coeff_tab9[6][3] =
{
    /* run = 1 */
    {
	{0x0f, 6}, {0x16, 9}, {0x05,10}
    },
    /* run = 2 */
    {
	{0x0e, 6}, {0x04,10}, {0x00, 0}
    },
    /* run = 3 */
    {
	{0x11, 7}, {0x24,11}, {0x00, 0}
    },
    /* run = 4 */
    {
	{0x10, 7}, {0x25,11}, {0x00, 0}
    },
    /* run = 5 */
    {
	{0x13, 7}, {0x5a,12}, {0x00, 0}
    },
    /* run = 6 */
    {
	{0x15, 8}, {0x5b,12}, {0x00, 0}
    }
};

/* Coeffs for last = 1, run = 7 -> 20. Indexed by [run-7] */

static VLCtable coeff_tab10[14] =
{
    {0x14, 8}, {0x13, 8}, {0x1a, 8}, {0x15, 9},
    {0x14, 9}, {0x13, 9}, {0x12, 9}, {0x11, 9},
    {0x26,11}, {0x27,11}, {0x5c,12}, {0x5d,12},
    {0x5e,12}, {0x5f,12}
};



/* RVLC tables */
/* DCT coefficients. Four tables, two for last = 0, two for last = 1.
   the sign bit must be added afterwards. */

/* DCT  coeffs (intra) for last = 0.  */

/* Indexed by [level-1] */

static VLCtable coeff_RVLCtab1[27] =
{
  /* run = 0 */
    {     0x6,  3},
    {     0x7,  3},
    {     0xa,  4},
    {     0x9,  5},
    {    0x14,  6},
    {    0x15,  6},
    {    0x34,  7},
    {    0x74,  8},
    {    0x75,  8},
    {    0xdd,  9},
    {    0xec,  9},
    {   0x1ec, 10},
    {   0x1ed, 10},
    {   0x1f4, 10},
    {   0x3ec, 11},
    {   0x3ed, 11},
    {   0x3f4, 11},
    {   0x77d, 12},
    {   0x7bc, 12},
    {   0xfbd, 13},
    {   0xfdc, 13},
    {   0x7bd, 12},
    {   0xfdd, 13},
    {  0x1fbd, 14},
    {  0x1fdc, 14},
    {  0x1fdd, 14},
    {  0x1ffc, 15}  
};


/* Indexed by [level-1] */

static VLCtable coeff_RVLCtab2[13] =
{
  /* run = 1 */
    {     0x1,  4},
    {     0x8,  5},
    {    0x2d,  7},
    {    0x6c,  8},
    {    0x6d,  8},
    {    0xdc,  9},
    {   0x1dd, 10},
    {   0x3dc, 11},
    {   0x3dd, 11},
    {   0x77c, 12},
    {   0xfbc, 13},
    {  0x1f7d, 14},
    {  0x1fbc, 14}  
};


/* Indexed by [level-1] */

static VLCtable coeff_RVLCtab3[11] =
{
  /* run = 2 */
    {     0x4,  5},
    {    0x2c,  7},
    {    0xbc,  9},
    {   0x1dc, 10},
    {   0x3bc, 11},
    {   0x3bd, 11},
    {   0xefd, 13},
    {   0xf7c, 13},
    {   0xf7d, 13},
    {  0x1efd, 14},
    {  0x1f7c, 14}  
};


/* Indexed by [level-1] */

static VLCtable coeff_RVLCtab4[9] =
{
  /* run = 3 */
    {     0x5,  5},
    {    0x5c,  8},
    {    0xbd,  9},
    {   0x37d, 11},
    {   0x6fc, 12},
    {   0xefc, 13},
    {  0x1dfd, 14},
    {  0x1efc, 14},
    {  0x1ffd, 15}  
};


/* Indexed by [run-4][level-1] */

static VLCtable coeff_RVLCtab5[2][6] =
{
  /* run = 4 */
  {
    {     0xc,  6},
    {    0x5d,  8},
    {   0x1bd, 10},
    {   0x3fd, 12},
    {   0x6fd, 12},
    {  0x1bfd, 14}  
  },
  /* run = 5 */
  {
    {     0xd,  6},
    {    0x7d,  9},
    {   0x2fc, 11},
    {   0x5fc, 12},
    {  0x1bfc, 14},
    {  0x1dfc, 14}  
  }
};


/* Indexed by [run-6][level-1]       */

static VLCtable coeff_RVLCtab6[2][5] =
{
  /* run = 6 */
  {
    {    0x1c,  7},
    {   0x17c, 10},
    {   0x2fd, 11},
    {   0x5fd, 12},
    {  0x2ffc, 15}  
  },
  /* run = 7 */
  {
    {    0x1d,  7},
    {   0x17d, 10},
    {   0x37c, 11},