getvlc.h

H.263的压缩算法

/************************************************************************
 *
 *  getvlc.h, variable length code tables for tmndecode (H.263 decoder)
 *  Copyright (C) 1995, 1996  Telenor R&D, Norway
 *  
 *  Contacts:
 *  Robert Danielsen                  <[e-mail]>
 *
 *  Telenor Research and Development  http://www.nta.no/brukere/DVC/
 *  P.O.Box 83                        tel.:   [phone]
 *  N-2007 Kjeller, Norway            fax.:   [phone]
 *
 *  Copyright (C) 1997  University of BC, Canada
 *  Modified by: Michael Gallant <[e-mail]>
 *               Guy Cote <[e-mail]>
 *               Berna Erol <[e-mail]>
 *
 *  Contacts:
 *  Michael Gallant                   <[e-mail]>
 *
 *  UBC Image Processing Laboratory   http://www.ee.ubc.ca/image
 *  2356 Main Mall                    tel.: [phone]
 *  Vancouver BC Canada V6T1Z4        fax.: [phone]
 *
 ************************************************************************/

/*
 * Disclaimer of Warranty
 *
 * These software programs are available to the user without any
 * license fee or royalty on an "as is" basis. The University of
 * British Columbia disclaims any and all warranties, whether
 * express, implied, or statuary, including any implied warranties
 * or merchantability or of fitness for a particular purpose.  In no
 * event shall the copyright-holder be liable for any incidental,
 * punitive, or consequential damages of any kind whatsoever arising
 * from the use of these programs.
 *
 * This disclaimer of warranty extends to the user of these programs
 * and user's customers, employees, agents, transferees, successors,
 * and assigns.
 *
 * The University of British Columbia does not represent or warrant
 * that the programs furnished hereunder are free of infringement of
 * any third-party patents.
 *
 * Commercial implementations of H.263, including shareware, are
 * subject to royalty fees to patent holders.  Many of these patents
 * are general enough such that they are unavoidable regardless of
 * implementation design.
 *
*/


/*
 * based on mpeg2decode, (C) 1994, MPEG Software Simulation Group
 * and mpeg2play, (C) 1994 Stefan Eckart
 *                         <[e-mail]>
 *
 */


typedef struct {
  int val, len;
} VLCtab;

typedef struct {
  char run, level, len;
} DCTtab;


static VLCtab TMNMVtab0[] = {
{3,4}, {61,4}, {2,3}, {2,3}, {62,3}, {62,3}, 
{1,2}, {1,2}, {1,2}, {1,2}, {63,2}, {63,2}, {63,2}, {63,2}
};

static VLCtab TMNMVtab1[] = {
{12,10}, {52,10}, {11,10}, {53,10}, {10,9}, {10,9}, 
{54,9}, {54,9}, {9,9}, {9,9}, {55,9}, {55,9}, 
{8,9}, {8,9}, {56,9}, {56,9}, {7,7}, {7,7}, 
{7,7}, {7,7}, {7,7}, {7,7}, {7,7}, {7,7}, 
{57,7}, {57,7}, {57,7}, {57,7}, {57,7}, {57,7}, 
{57,7}, {57,7}, {6,7}, {6,7}, {6,7}, {6,7}, 
{6,7}, {6,7}, {6,7}, {6,7}, {58,7}, {58,7}, 
{58,7}, {58,7}, {58,7}, {58,7}, {58,7}, {58,7}, 
{5,7}, {5,7}, {5,7}, {5,7}, {5,7}, {5,7}, 
{5,7}, {5,7}, {59,7}, {59,7}, {59,7}, {59,7}, 
{59,7}, {59,7}, {59,7}, {59,7}, {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}, {60,6}, {60,6},{60,6},{60,6},
{60,6},{60,6},{60,6},{60,6},{60,6},{60,6},
{60,6},{60,6},{60,6},{60,6},{60,6},{60,6}
};

static VLCtab TMNMVtab2[] = {
{32,12}, {31,12}, {33,12}, {30,11}, {30,11}, {34,11}, 
{34,11}, {29,11}, {29,11}, {35,11}, {35,11}, {28,11}, 
{28,11}, {36,11}, {36,11}, {27,11}, {27,11}, {37,11}, 
{37,11}, {26,11}, {26,11}, {38,11}, {38,11}, {25,11}, 
{25,11}, {39,11}, {39,11}, {24,10}, {24,10}, {24,10}, 
{24,10}, {40,10}, {40,10}, {40,10}, {40,10}, {23,10}, 
{23,10}, {23,10}, {23,10}, {41,10}, {41,10}, {41,10}, 
{41,10}, {22,10}, {22,10}, {22,10}, {22,10}, {42,10}, 
{42,10}, {42,10}, {42,10}, {21,10}, {21,10}, {21,10}, 
{21,10}, {43,10}, {43,10}, {43,10}, {43,10}, {20,10}, 
{20,10}, {20,10}, {20,10}, {44,10}, {44,10}, {44,10}, 
{44,10}, {19,10}, {19,10}, {19,10}, {19,10}, {45,10}, 
{45,10}, {45,10}, {45,10}, {18,10}, {18,10}, {18,10}, 
{18,10}, {46,10}, {46,10}, {46,10}, {46,10}, {17,10}, 
{17,10}, {17,10}, {17,10}, {47,10}, {47,10}, {47,10}, 
{47,10}, {16,10}, {16,10}, {16,10}, {16,10}, {48,10}, 
{48,10}, {48,10}, {48,10}, {15,10}, {15,10}, {15,10}, 
{15,10}, {49,10}, {49,10}, {49,10}, {49,10}, {14,10}, 
{14,10}, {14,10}, {14,10}, {50,10}, {50,10}, {50,10}, 
{50,10}, {13,10}, {13,10}, {13,10}, {13,10}, {51,10}, 
{51,10}, {51,10}, {51,10}
};


static VLCtab MCBPCtab0[] = {
{-1,0},
{255,9}, {52,9}, {36,9}, {20,9}, {49,9}, {35,8}, {35,8}, {19,8}, {19,8}, 
{50,8}, {50,8}, {51,7}, {51,7}, {51,7}, {51,7}, {34,7}, {34,7}, {34,7}, 
{34,7}, {18,7}, {18,7}, {18,7}, {18,7}, {33,7}, {33,7}, {33,7}, {33,7}, 
{17,7}, {17,7}, {17,7}, {17,7}, {4,6}, {4,6}, {4,6}, {4,6}, {4,6}, 
{4,6}, {4,6}, {4,6}, {48,6}, {48,6}, {48,6}, {48,6}, {48,6}, {48,6}, 
{48,6}, {48,6}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, 
{3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, {3,5}, 
{32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, 
{32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, 
{32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {32,4}, 
{32,4}, {32,4}, {32,4}, {32,4}, {32,4}, {16,4}, {16,4}, {16,4}, {16,4}, 
{16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, 
{16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, 
{16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, {16,4}, 
{16,4}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, 
};

static VLCtab MCBPCtab1[] = {
{5,11}, {5,11},  {5,11}, {5,11}, {21,13}, {21,13}, {37,13}, {53,13}, 
};


static VLCtab MBTYPEtabB[] = {
{-1,0}, {12,7}, {11,6}, {11,6}, {10,5}, {10,5}, {10,5}, {10,5}, 
{1,4}, {1,4}, {1,4}, {1,4}, {1,4}, {1,4}, {1,4}, {1,4}, 
{8,5}, {8,5}, {8,5}, {8,5}, {9,5}, {9,5}, {9,5}, {9,5}, 
{4,5}, {4,5}, {4,5}, {4,5}, {7,5}, {7,5}, {7,5}, {7,5},
{5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, 
{5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, {5,3}, 
{6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, 
{6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, {6,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, 
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3} 
};

static int CBP_present_B[]   =  {1,1,0,1,1,0,1,1,0,1,1,1,1};
static int QUANT_present_B[] =  {0,1,0,0,1,0,0,1,0,0,1,0,1};
static int PRED_type_B[]    =   {0,0,1,1,1,2,2,2,3,3,3,4,4};

static VLCtab MBTYPEtabEP[] = {
{-1,0}, {9,8}, {8,7}, {8,7}, {7,6}, {7,6}, {7,6}, {7,6}, 
{4,5}, {4,5}, {4,5}, {4,5}, {4,5}, {4,5}, {4,5}, {4,5}, 
{5,5}, {5,5}, {5,5}, {5,5}, {5,5}, {5,5}, {5,5}, {5,5}, 
{6,5}, {6,5}, {6,5}, {6,5}, {6,5}, {6,5}, {6,5}, {6,5}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, {1,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, {2,3}, 
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, 
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3},
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, 
{3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}, {3,3}
};

static int CBP_present_EP[]   =  {1,1,0,1,1,0,1,1,1,1};
static int QUANT_present_EP[] =  {0,1,0,0,1,0,0,1,0,1};
static int PRED_type_EP[]     =  {0,0,1,1,1,2,2,2,3,3};
  
static VLCtab MBTYPEtabEI[] = {
{-1,0}, {8,8}, {5,7}, {5,7}, {6,7}, {6,7}, {7,7}, {7,7},
{-1,0}, {9,8}, {10,8}, {11,8}, {12,8}, {13,8}, {14,8}, {15,8},