Horus C++ Reference

00001 /* getvlc.h, variable length code tables                                    */
00002 
00003 /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
00004 
00005 /*
00006  * Disclaimer of Warranty
00007  *
00008  * These software programs are available to the user without any license fee or
00009  * royalty on an "as is" basis.  The MPEG Software Simulation Group disclaims
00010  * any and all warranties, whether express, implied, or statuary, including any
00011  * implied warranties or merchantability or of fitness for a particular
00012  * purpose.  In no event shall the copyright-holder be liable for any
00013  * incidental, punitive, or consequential damages of any kind whatsoever
00014  * arising from the use of these programs.
00015  *
00016  * This disclaimer of warranty extends to the user of these programs and user's
00017  * customers, employees, agents, transferees, successors, and assigns.
00018  *
00019  * The MPEG Software Simulation Group does not represent or warrant that the
00020  * programs furnished hereunder are free of infringement of any third-party
00021  * patents.
00022  *
00023  * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
00024  * are subject to royalty fees to patent holders.  Many of these patents are
00025  * general enough such that they are unavoidable regardless of implementation
00026  * design.
00027  *
00028  */
00029 
00030 /* NOTE: #define constants such as MACROBLOCK_QUANT are upper case 
00031    as per C programming convention. However, the MPEG document 
00032    (ISO/IEC 13818-2) lists them in all lower case (e.g. Annex B) */
00033 
00034 /* NOTE: the VLC tables are in a flash format---a transformation
00035    of the tables in Annex B to a form more convenient towards 
00036    parallel (more than one-bit-at-a-time) decoding */
00037 
00038 typedef struct {
00039   char val, len;
00040 } VLCtab;
00041 
00042 typedef struct {
00043   char run, level, len;
00044 } DCTtab;
00045 
00046 /* Table B-3, macroblock_type in P-pictures, codes 001..1xx */
00047 static VLCtab PMBtab0[8] = {
00048   {ERROR,0},
00049   {MACROBLOCK_MOTION_FORWARD,3},
00050   {MACROBLOCK_PATTERN,2}, {MACROBLOCK_PATTERN,2},
00051   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1}, 
00052   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1},
00053   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1}, 
00054   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1}
00055 };
00056 
00057 /* Table B-3, macroblock_type in P-pictures, codes 000001..00011x */
00058 static VLCtab PMBtab1[8] = {
00059   {ERROR,0},
00060   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,6},
00061   {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,5}, {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,5},
00062   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,5}, {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,5},
00063   {MACROBLOCK_INTRA,5}, {MACROBLOCK_INTRA,5}
00064 };
00065 
00066 /* Table B-4, macroblock_type in B-pictures, codes 0010..11xx */
00067 static VLCtab BMBtab0[16] = {
00068   {ERROR,0}, 
00069   {ERROR,0},
00070   {MACROBLOCK_MOTION_FORWARD,4},
00071   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,4},
00072   {MACROBLOCK_MOTION_BACKWARD,3}, 
00073   {MACROBLOCK_MOTION_BACKWARD,3},
00074   {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3}, 
00075   {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
00076   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2}, 
00077   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
00078   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2}, 
00079   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
00080   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00081   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00082   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00083   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2}
00084 };
00085 
00086 /* Table B-4, macroblock_type in B-pictures, codes 000001..00011x */
00087 static VLCtab BMBtab1[8] = {
00088   {ERROR,0},
00089   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,6},
00090   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6},
00091   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6},
00092   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,5},
00093   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,5},
00094   {MACROBLOCK_INTRA,5}, 
00095   {MACROBLOCK_INTRA,5}
00096 };
00097 
00098 /* Table B-5, macroblock_type in spat. scal. I-pictures, codes 0001..1xxx */
00099 static VLCtab spIMBtab[16] = {
00100   {ERROR,0},
00101   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,4},
00102   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,4},
00103   {MACROBLOCK_INTRA,4},
00104   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
00105   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
00106   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
00107   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
00108   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
00109   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}
00110 };
00111 
00112 /* Table B-6, macroblock_type in spat. scal. P-pictures, codes 0010..11xx */
00113 static VLCtab spPMBtab0[16] =
00114 {
00115   {ERROR,0},
00116   {ERROR,0},
00117   {MACROBLOCK_MOTION_FORWARD,4},
00118   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,4},
00119   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3}, {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3},
00120   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3}, {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3},
00121   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2}, 
00122   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
00123   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2}, 
00124   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
00125   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
00126   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
00127   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
00128   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2}
00129 };
00130 
00131 /* Table B-6, macroblock_type in spat. scal. P-pictures, codes 0000010..000111x */
00132 static VLCtab spPMBtab1[16] = {
00133   {ERROR,0},
00134   {ERROR,0},
00135   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,7},
00136   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,7},
00137   {MACROBLOCK_PATTERN,7},
00138   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,7},
00139   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,7},
00140   {MACROBLOCK_INTRA,7},
00141   {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6}, 
00142   {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
00143   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6}, 
00144   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
00145   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG,6}, 
00146   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG,6},
00147   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_PATTERN,6}, 
00148   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_PATTERN,6}
00149 };
00150 
00151 /* Table B-7, macroblock_type in spat. scal. B-pictures, codes 0010..11xx */
00152 static VLCtab spBMBtab0[14] = {
00153   {MACROBLOCK_MOTION_FORWARD,4},
00154   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,4},
00155   {MACROBLOCK_MOTION_BACKWARD,3}, 
00156   {MACROBLOCK_MOTION_BACKWARD,3},
00157   {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3}, 
00158   {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
00159   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2}, 
00160   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
00161   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2}, 
00162   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
00163   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00164   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00165   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
00166   {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2}
00167 };
00168 
00169 /* Table B-7, macroblock_type in spat. scal. B-pictures, codes 0000100..000111x */
00170 static VLCtab spBMBtab1[12] = {
00171   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,7},
00172   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,7},
00173   {MACROBLOCK_INTRA,7},
00174   {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,7},
00175   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,6}, 
00176   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,6},
00177   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6}, 
00178   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6},
00179   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD,6}, 
00180   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD,6},
00181   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6}, 
00182   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6}
00183 };
00184 
00185 /* Table B-7, macroblock_type in spat. scal. B-pictures, codes 00000100x..000001111 */
00186 static VLCtab spBMBtab2[8] = {
00187   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,8}, 
00188   {MACROBLOCK_QUANT|MACROBLOCK_INTRA,8},
00189   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,8},
00190   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,8},
00191   {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,9},
00192   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,9},
00193   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,9},
00194   {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,9}
00195 };
00196 
00197 /* Table B-8, macroblock_type in spat. scal. B-pictures, codes 001..1xx */
00198 static VLCtab SNRMBtab[8] = {
00199   {ERROR,0},
00200   {0,3},
00201   {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2}, 
00202   {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
00203   {MACROBLOCK_PATTERN,1}, 
00204   {MACROBLOCK_PATTERN,1}, 
00205   {MACROBLOCK_PATTERN,1}, 
00206   {MACROBLOCK_PATTERN,1}
00207 };
00208 
00209 /* Table B-10, motion_code, codes 0001 ... 01xx */
00210 static VLCtab MVtab0[8] =
00211 { {ERROR,0}, {3,3}, {2,2}, {2,2}, {1,1}, {1,1}, {1,1}, {1,1}
00212 };
00213 
00214 /* Table B-10, motion_code, codes 0000011 ... 000011x */
00215 static VLCtab MVtab1[8] =
00216 { {ERROR,0}, {ERROR,0}, {ERROR,0}, {7,6}, {6,6}, {5,6}, {4,5}, {4,5}
00217 };
00218 
00219 /* Table B-10, motion_code, codes 0000001100 ... 000001011x */
00220 static VLCtab MVtab2[12] =
00221 { {16,9}, {15,9}, {14,9}, {13,9},
00222   {12,9}, {11,9}, {10,8}, {10,8},
00223   {9,8},  {9,8},  {8,8},  {8,8}
00224 };
00225 
00226 /* Table B-9, coded_block_pattern, codes 01000 ... 111xx */
00227 static VLCtab CBPtab0[32] =
00228 { {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
00229   {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
00230   {62,5}, {2,5},  {61,5}, {1,5},  {56,5}, {52,5}, {44,5}, {28,5},
00231   {40,5}, {20,5}, {48,5}, {12,5}, {32,4}, {32,4}, {16,4}, {16,4},
00232   {8,4},  {8,4},  {4,4},  {4,4},  {60,3}, {60,3}, {60,3}, {60,3}
00233 };
00234 
00235 /* Table B-9, coded_block_pattern, codes 00000100 ... 001111xx */
00236 static VLCtab CBPtab1[64] =
00237 { {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
00238   {58,8}, {54,8}, {46,8}, {30,8},
00239   {57,8}, {53,8}, {45,8}, {29,8}, {38,8}, {26,8}, {37,8}, {25,8},
00240   {43,8}, {23,8}, {51,8}, {15,8}, {42,8}, {22,8}, {50,8}, {14,8},
00241   {41,8}, {21,8}, {49,8}, {13,8}, {35,8}, {19,8}, {11,8}, {7,8},
00242   {34,7}, {34,7}, {18,7}, {18,7}, {10,7}, {10,7}, {6,7},  {6,7},
00243   {33,7}, {33,7}, {17,7}, {17,7}, {9,7},  {9,7},  {5,7},  {5,7},
00244   {63,6}, {63,6}, {63,6}, {63,6}, {3,6},  {3,6},  {3,6},  {3,6},
00245   {36,6}, {36,6}, {36,6}, {36,6}, {24,6}, {24,6}, {24,6}, {24,6}
00246 };
00247 
00248 /* Table B-9, coded_block_pattern, codes 000000001 ... 000000111 */
00249 static VLCtab CBPtab2[8] =
00250 { {ERROR,0}, {0,9}, {39,9}, {27,9}, {59,9}, {55,9}, {47,9}, {31,9}
00251 };
00252 
00253 /* Table B-1, macroblock_address_increment, codes 00010 ... 011xx */
00254 static VLCtab MBAtab1[16] =
00255 { {ERROR,0}, {ERROR,0}, {7,5}, {6,5}, {5,4}, {5,4}, {4,4}, {4,4},
00256   {3,3}, {3,3}, {3,3}, {3,3}, {2,3}, {2,3}, {2,3}, {2,3}
00257 };
00258 
00259 /* Table B-1, macroblock_address_increment, codes 00000011000 ... 0000111xxxx */
00260 static VLCtab MBAtab2[104] =
00261 {
00262   {33,11}, {32,11}, {31,11}, {30,11}, {29,11}, {28,11}, {27,11}, {26,11},
00263   {25,11}, {24,11}, {23,11}, {22,11}, {21,10}, {21,10}, {20,10}, {20,10},
00264   {19,10}, {19,10}, {18,10}, {18,10}, {17,10}, {17,10}, {16,10}, {16,10},
00265   {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},
00266   {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},
00267   {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},
00268   {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},
00269   {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},
00270   {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},
00271   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},
00272   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},
00273   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},
00274   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7}
00275 };
00276 
00277 /* Table B-12, dct_dc_size_luminance, codes 00xxx ... 11110 */
00278 static VLCtab DClumtab0[32] =
00279 { {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
00280   {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
00281   {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
00282   {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {ERROR, 0}
00283 };
00284 
00285 /* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
00286 static VLCtab DClumtab1[16] =
00287 { {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
00288   {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9}
00289 };
00290 
00291 /* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
00292 static VLCtab DCchromtab0[32] =
00293 { {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
00294   {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
00295   {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
00296   {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {ERROR, 0}
00297 };
00298 
00299 /* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
00300 static VLCtab DCchromtab1[32] =
00301 { {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
00302   {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
00303   {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
00304   {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
00305 };
00306 
00307 /* Table B-14, DCT coefficients table zero,
00308  * codes 0100 ... 1xxx (used for first (DC) coefficient)
00309  */
00310 DCTtab DCTtabfirst[12] =
00311 {
00312   {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
00313   {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
00314   {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
00315 };
00316 
00317 /* Table B-14, DCT coefficients table zero,
00318  * codes 0100 ... 1xxx (used for all other coefficients)
00319  */
00320 DCTtab DCTtabnext[12] =
00321 {
00322   {0,2,4},  {2,1,4},  {1,1,3},  {1,1,3},
00323   {64,0,2}, {64,0,2}, {64,0,2}, {64,0,2}, /* EOB */
00324   {0,1,2},  {0,1,2},  {0,1,2},  {0,1,2}
00325 };
00326 
00327 /* Table B-14, DCT coefficients table zero,
00328  * codes 000001xx ... 00111xxx
00329  */
00330 DCTtab DCTtab0[60] =
00331 {
00332   {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
00333   {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
00334   {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
00335   {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
00336   {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
00337   {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
00338   {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
00339   {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
00340   {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
00341   {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
00342   {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
00343   {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
00344   {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
00345   {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
00346   {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
00347 };
00348 
00349 /* Table B-15, DCT coefficients table one,
00350  * codes 000001xx ... 11111111
00351 */
00352 DCTtab DCTtab0a[252] =
00353 {
00354   {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
00355   {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
00356   {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
00357   {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
00358   {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
00359   {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
00360   {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
00361   {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
00362   {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
00363   {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
00364   {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
00365   {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
00366   {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
00367   {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
00368   {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
00369   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00370   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00371   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00372   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00373   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00374   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00375   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00376   {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
00377   {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4}, /* EOB */
00378   {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
00379   {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
00380   {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
00381   {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
00382   {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
00383   {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
00384   {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
00385   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00386   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00387   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00388   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00389   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00390   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00391   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00392   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00393   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00394   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00395   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00396   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00397   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00398   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00399   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00400   {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
00401   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00402   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00403   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00404   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00405   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00406   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00407   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00408   {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
00409   {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
00410   {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
00411   {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
00412   {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
00413   {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
00414   {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
00415   {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
00416   {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
00417 };
00418 
00419 /* Table B-14, DCT coefficients table zero,
00420  * codes 0000001000 ... 0000001111
00421  */
00422 DCTtab DCTtab1[8] =
00423 {
00424   {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
00425   {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
00426 };
00427 
00428 /* Table B-15, DCT coefficients table one,
00429  * codes 000000100x ... 000000111x
00430  */
00431 DCTtab DCTtab1a[8] =
00432 {
00433   {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
00434   {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
00435 };
00436 
00437 /* Table B-14/15, DCT coefficients table zero / one,
00438  * codes 000000010000 ... 000000011111
00439  */
00440 DCTtab DCTtab2[16] =
00441 {
00442   {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
00443   {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
00444   {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
00445   {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
00446 };
00447 
00448 /* Table B-14/15, DCT coefficients table zero / one,
00449  * codes 0000000010000 ... 0000000011111
00450  */
00451 DCTtab DCTtab3[16] =
00452 {
00453   {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
00454   {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
00455   {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
00456   {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
00457 };
00458 
00459 /* Table B-14/15, DCT coefficients table zero / one,
00460  * codes 00000000010000 ... 00000000011111
00461  */
00462 DCTtab DCTtab4[16] =
00463 {
00464   {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
00465   {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
00466   {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
00467   {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
00468 };
00469 
00470 /* Table B-14/15, DCT coefficients table zero / one,
00471  * codes 000000000010000 ... 000000000011111
00472  */
00473 DCTtab DCTtab5[16] =
00474 {
00475   {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
00476   {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
00477   {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
00478   {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
00479 };
00480 
00481 /* Table B-14/15, DCT coefficients table zero / one,
00482  * codes 0000000000010000 ... 0000000000011111
00483  */
00484 DCTtab DCTtab6[16] =
00485 {
00486   {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
00487   {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
00488   {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
00489   {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
00490 };
00491