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1624 giacomo 1 
/* getvlc.h, variable length code tables                                    */
2 
 
3 
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
4 
 
5 
/*
6 
 * Disclaimer of Warranty
7 
 *
8 
 * These software programs are available to the user without any license fee or
9 
 * royalty on an "as is" basis.  The MPEG Software Simulation Group disclaims
10 
 * any and all warranties, whether express, implied, or statuary, including any
11 
 * implied warranties or merchantability or of fitness for a particular
12 
 * purpose.  In no event shall the copyright-holder be liable for any
13 
 * incidental, punitive, or consequential damages of any kind whatsoever
14 
 * arising from the use of these programs.
15 
 *
16 
 * This disclaimer of warranty extends to the user of these programs and user's
17 
 * customers, employees, agents, transferees, successors, and assigns.
18 
 *
19 
 * The MPEG Software Simulation Group does not represent or warrant that the
20 
 * programs furnished hereunder are free of infringement of any third-party
21 
 * patents.
22 
 *
23 
 * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
24 
 * are subject to royalty fees to patent holders.  Many of these patents are
25 
 * general enough such that they are unavoidable regardless of implementation
26 
 * design.
27 
 *
28 
 */
29 
 
30 
/* NOTE: #define constants such as MACROBLOCK_QUANT are upper case
31 
   as per C programming convention. However, the MPEG document
32 
   (ISO/IEC 13818-2) lists them in all lower case (e.g. Annex B) */
33 
 
34 
/* NOTE: the VLC tables are in a flash format---a transformation
35 
   of the tables in Annex B to a form more convenient towards
36 
   parallel (more than one-bit-at-a-time) decoding */
37 
 
38 
typedef struct {
39 
  char val, len;
40 
} VLCtab;
41 
 
42 
typedef struct {
43 
  char run, level, len;
44 
} DCTtab;
45 
 
46 
/* Table B-3, macroblock_type in P-pictures, codes 001..1xx */
47 
static VLCtab PMBtab0[8] = {
48 
  {ERROR,0},
49 
  {MACROBLOCK_MOTION_FORWARD,3},
50 
  {MACROBLOCK_PATTERN,2}, {MACROBLOCK_PATTERN,2},
51 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1},
52 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1},
53 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1},
54 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,1}
55 
};
56 
 
57 
/* Table B-3, macroblock_type in P-pictures, codes 000001..00011x */
58 
static VLCtab PMBtab1[8] = {
59 
  {ERROR,0},
60 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,6},
61 
  {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,5}, {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,5},
62 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,5}, {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,5},
63 
  {MACROBLOCK_INTRA,5}, {MACROBLOCK_INTRA,5}
64 
};
65 
 
66 
/* Table B-4, macroblock_type in B-pictures, codes 0010..11xx */
67 
static VLCtab BMBtab0[16] = {
68 
  {ERROR,0},
69 
  {ERROR,0},
70 
  {MACROBLOCK_MOTION_FORWARD,4},
71 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,4},
72 
  {MACROBLOCK_MOTION_BACKWARD,3},
73 
  {MACROBLOCK_MOTION_BACKWARD,3},
74 
  {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
75 
  {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
76 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
77 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
78 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
79 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
80 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
81 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
82 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
83 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2}
84 
};
85 
 
86 
/* Table B-4, macroblock_type in B-pictures, codes 000001..00011x */
87 
static VLCtab BMBtab1[8] = {
88 
  {ERROR,0},
89 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,6},
90 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6},
91 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6},
92 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,5},
93 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,5},
94 
  {MACROBLOCK_INTRA,5},
95 
  {MACROBLOCK_INTRA,5}
96 
};
97 
 
98 
/* Table B-5, macroblock_type in spat. scal. I-pictures, codes 0001..1xxx */
99 
static VLCtab spIMBtab[16] = {
100 
  {ERROR,0},
101 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,4},
102 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,4},
103 
  {MACROBLOCK_INTRA,4},
104 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
105 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
106 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
107 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
108 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1},
109 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}, {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,1}
110 
};
111 
 
112 
/* Table B-6, macroblock_type in spat. scal. P-pictures, codes 0010..11xx */
113 
static VLCtab spPMBtab0[16] =
114 
{
115 
  {ERROR,0},
116 
  {ERROR,0},
117 
  {MACROBLOCK_MOTION_FORWARD,4},
118 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,4},
119 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3}, {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3},
120 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3}, {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,3},
121 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
122 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
123 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
124 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
125 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
126 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
127 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2},
128 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,2}
129 
};
130 
 
131 
/* Table B-6, macroblock_type in spat. scal. P-pictures, codes 0000010..000111x */
132 
static VLCtab spPMBtab1[16] = {
133 
  {ERROR,0},
134 
  {ERROR,0},
135 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,7},
136 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,7},
137 
  {MACROBLOCK_PATTERN,7},
138 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,7},
139 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,7},
140 
  {MACROBLOCK_INTRA,7},
141 
  {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
142 
  {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
143 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
144 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,6},
145 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG,6},
146 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG,6},
147 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_PATTERN,6},
148 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_PATTERN,6}
149 
};
150 
 
151 
/* Table B-7, macroblock_type in spat. scal. B-pictures, codes 0010..11xx */
152 
static VLCtab spBMBtab0[14] = {
153 
  {MACROBLOCK_MOTION_FORWARD,4},
154 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,4},
155 
  {MACROBLOCK_MOTION_BACKWARD,3},
156 
  {MACROBLOCK_MOTION_BACKWARD,3},
157 
  {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
158 
  {MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,3},
159 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
160 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
161 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
162 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD,2},
163 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
164 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
165 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2},
166 
  {MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,2}
167 
};
168 
 
169 
/* Table B-7, macroblock_type in spat. scal. B-pictures, codes 0000100..000111x */
170 
static VLCtab spBMBtab1[12] = {
171 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,7},
172 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,7},
173 
  {MACROBLOCK_INTRA,7},
174 
  {MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,7},
175 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,6},
176 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD,6},
177 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6},
178 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,6},
179 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD,6},
180 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD,6},
181 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6},
182 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,6}
183 
};
184 
 
185 
/* Table B-7, macroblock_type in spat. scal. B-pictures, codes 00000100x..000001111 */
186 
static VLCtab spBMBtab2[8] = {
187 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,8},
188 
  {MACROBLOCK_QUANT|MACROBLOCK_INTRA,8},
189 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,8},
190 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_FORWARD|MACROBLOCK_PATTERN,8},
191 
  {SPATIAL_TEMPORAL_WEIGHT_CODE_FLAG|MACROBLOCK_QUANT|MACROBLOCK_MOTION_BACKWARD|MACROBLOCK_PATTERN,9},
192 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_QUANT|MACROBLOCK_PATTERN,9},
193 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS,9},
194 
  {PERMITTED_SPATIAL_TEMPORAL_WEIGHT_CLASS|MACROBLOCK_PATTERN,9}
195 
};
196 
 
197 
/* Table B-8, macroblock_type in spat. scal. B-pictures, codes 001..1xx */
198 
static VLCtab SNRMBtab[8] = {
199 
  {ERROR,0},
200 
  {0,3},
201 
  {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
202 
  {MACROBLOCK_QUANT|MACROBLOCK_PATTERN,2},
203 
  {MACROBLOCK_PATTERN,1},
204 
  {MACROBLOCK_PATTERN,1},
205 
  {MACROBLOCK_PATTERN,1},
206 
  {MACROBLOCK_PATTERN,1}
207 
};
208 
 
209 
/* Table B-10, motion_code, codes 0001 ... 01xx */
210 
static VLCtab MVtab0[8] =
211 
{ {ERROR,0}, {3,3}, {2,2}, {2,2}, {1,1}, {1,1}, {1,1}, {1,1}
212 
};
213 
 
214 
/* Table B-10, motion_code, codes 0000011 ... 000011x */
215 
static VLCtab MVtab1[8] =
216 
{ {ERROR,0}, {ERROR,0}, {ERROR,0}, {7,6}, {6,6}, {5,6}, {4,5}, {4,5}
217 
};
218 
 
219 
/* Table B-10, motion_code, codes 0000001100 ... 000001011x */
220 
static VLCtab MVtab2[12] =
221 
{ {16,9}, {15,9}, {14,9}, {13,9},
222 
  {12,9}, {11,9}, {10,8}, {10,8},
223 
  {9,8},  {9,8},  {8,8},  {8,8}
224 
};
225 
 
226 
/* Table B-9, coded_block_pattern, codes 01000 ... 111xx */
227 
static VLCtab CBPtab0[32] =
228 
{ {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
229 
  {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
230 
  {62,5}, {2,5},  {61,5}, {1,5},  {56,5}, {52,5}, {44,5}, {28,5},
231 
  {40,5}, {20,5}, {48,5}, {12,5}, {32,4}, {32,4}, {16,4}, {16,4},
232 
  {8,4},  {8,4},  {4,4},  {4,4},  {60,3}, {60,3}, {60,3}, {60,3}
233 
};
234 
 
235 
/* Table B-9, coded_block_pattern, codes 00000100 ... 001111xx */
236 
static VLCtab CBPtab1[64] =
237 
{ {ERROR,0}, {ERROR,0}, {ERROR,0}, {ERROR,0},
238 
  {58,8}, {54,8}, {46,8}, {30,8},
239 
  {57,8}, {53,8}, {45,8}, {29,8}, {38,8}, {26,8}, {37,8}, {25,8},
240 
  {43,8}, {23,8}, {51,8}, {15,8}, {42,8}, {22,8}, {50,8}, {14,8},
241 
  {41,8}, {21,8}, {49,8}, {13,8}, {35,8}, {19,8}, {11,8}, {7,8},
242 
  {34,7}, {34,7}, {18,7}, {18,7}, {10,7}, {10,7}, {6,7},  {6,7},
243 
  {33,7}, {33,7}, {17,7}, {17,7}, {9,7},  {9,7},  {5,7},  {5,7},
244 
  {63,6}, {63,6}, {63,6}, {63,6}, {3,6},  {3,6},  {3,6},  {3,6},
245 
  {36,6}, {36,6}, {36,6}, {36,6}, {24,6}, {24,6}, {24,6}, {24,6}
246 
};
247 
 
248 
/* Table B-9, coded_block_pattern, codes 000000001 ... 000000111 */
249 
static VLCtab CBPtab2[8] =
250 
{ {ERROR,0}, {0,9}, {39,9}, {27,9}, {59,9}, {55,9}, {47,9}, {31,9}
251 
};
252 
 
253 
/* Table B-1, macroblock_address_increment, codes 00010 ... 011xx */
254 
static VLCtab MBAtab1[16] =
255 
{ {ERROR,0}, {ERROR,0}, {7,5}, {6,5}, {5,4}, {5,4}, {4,4}, {4,4},
256 
  {3,3}, {3,3}, {3,3}, {3,3}, {2,3}, {2,3}, {2,3}, {2,3}
257 
};
258 
 
259 
/* Table B-1, macroblock_address_increment, codes 00000011000 ... 0000111xxxx */
260 
static VLCtab MBAtab2[104] =
261 
{
262 
  {33,11}, {32,11}, {31,11}, {30,11}, {29,11}, {28,11}, {27,11}, {26,11},
263 
  {25,11}, {24,11}, {23,11}, {22,11}, {21,10}, {21,10}, {20,10}, {20,10},
264 
  {19,10}, {19,10}, {18,10}, {18,10}, {17,10}, {17,10}, {16,10}, {16,10},
265 
  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},  {15,8},
266 
  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},  {14,8},
267 
  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},  {13,8},
268 
  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},  {12,8},
269 
  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},  {11,8},
270 
  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},  {10,8},
271 
  {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},
272 
  {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},   {9,7},
273 
  {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},
274 
  {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7},   {8,7}
275 
};
276 
 
277 
/* Table B-12, dct_dc_size_luminance, codes 00xxx ... 11110 */
278 
static VLCtab DClumtab0[32] =
279 
{ {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
280 
  {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
281 
  {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
282 
  {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}, {ERROR, 0}
283 
};
284 
 
285 
/* Table B-12, dct_dc_size_luminance, codes 111110xxx ... 111111111 */
286 
static VLCtab DClumtab1[16] =
287 
{ {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6},
288 
  {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10,9}, {11,9}
289 
};
290 
 
291 
/* Table B-13, dct_dc_size_chrominance, codes 00xxx ... 11110 */
292 
static VLCtab DCchromtab0[32] =
293 
{ {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
294 
  {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
295 
  {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
296 
  {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}, {ERROR, 0}
297 
};
298 
 
299 
/* Table B-13, dct_dc_size_chrominance, codes 111110xxxx ... 1111111111 */
300 
static VLCtab DCchromtab1[32] =
301 
{ {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
302 
  {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6}, {6, 6},
303 
  {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7}, {7, 7},
304 
  {8, 8}, {8, 8}, {8, 8}, {8, 8}, {9, 9}, {9, 9}, {10,10}, {11,10}
305 
};
306 
 
307 
/* Table B-14, DCT coefficients table zero,
308 
 * codes 0100 ... 1xxx (used for first (DC) coefficient)
309 
 */
310 
DCTtab DCTtabfirst[12] =
311 
{
312 
  {0,2,4}, {2,1,4}, {1,1,3}, {1,1,3},
313 
  {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1},
314 
  {0,1,1}, {0,1,1}, {0,1,1}, {0,1,1}
315 
};
316 
 
317 
/* Table B-14, DCT coefficients table zero,
318 
 * codes 0100 ... 1xxx (used for all other coefficients)
319 
 */
320 
DCTtab DCTtabnext[12] =
321 
{
322 
  {0,2,4},  {2,1,4},  {1,1,3},  {1,1,3},
323 
  {64,0,2}, {64,0,2}, {64,0,2}, {64,0,2}, /* EOB */
324 
  {0,1,2},  {0,1,2},  {0,1,2},  {0,1,2}
325 
};
326 
 
327 
/* Table B-14, DCT coefficients table zero,
328 
 * codes 000001xx ... 00111xxx
329 
 */
330 
DCTtab DCTtab0[60] =
331 
{
332 
  {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
333 
  {2,2,7}, {2,2,7}, {9,1,7}, {9,1,7},
334 
  {0,4,7}, {0,4,7}, {8,1,7}, {8,1,7},
335 
  {7,1,6}, {7,1,6}, {7,1,6}, {7,1,6},
336 
  {6,1,6}, {6,1,6}, {6,1,6}, {6,1,6},
337 
  {1,2,6}, {1,2,6}, {1,2,6}, {1,2,6},
338 
  {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
339 
  {13,1,8}, {0,6,8}, {12,1,8}, {11,1,8},
340 
  {3,2,8}, {1,3,8}, {0,5,8}, {10,1,8},
341 
  {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
342 
  {0,3,5}, {0,3,5}, {0,3,5}, {0,3,5},
343 
  {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
344 
  {4,1,5}, {4,1,5}, {4,1,5}, {4,1,5},
345 
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
346 
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5}
347 
};
348 
 
349 
/* Table B-15, DCT coefficients table one,
350 
 * codes 000001xx ... 11111111
351 
*/
352 
DCTtab DCTtab0a[252] =
353 
{
354 
  {65,0,6}, {65,0,6}, {65,0,6}, {65,0,6}, /* Escape */
355 
  {7,1,7}, {7,1,7}, {8,1,7}, {8,1,7},
356 
  {6,1,7}, {6,1,7}, {2,2,7}, {2,2,7},
357 
  {0,7,6}, {0,7,6}, {0,7,6}, {0,7,6},
358 
  {0,6,6}, {0,6,6}, {0,6,6}, {0,6,6},
359 
  {4,1,6}, {4,1,6}, {4,1,6}, {4,1,6},
360 
  {5,1,6}, {5,1,6}, {5,1,6}, {5,1,6},
361 
  {1,5,8}, {11,1,8}, {0,11,8}, {0,10,8},
362 
  {13,1,8}, {12,1,8}, {3,2,8}, {1,4,8},
363 
  {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
364 
  {2,1,5}, {2,1,5}, {2,1,5}, {2,1,5},
365 
  {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
366 
  {1,2,5}, {1,2,5}, {1,2,5}, {1,2,5},
367 
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
368 
  {3,1,5}, {3,1,5}, {3,1,5}, {3,1,5},
369 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
370 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
371 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
372 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
373 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
374 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
375 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
376 
  {1,1,3}, {1,1,3}, {1,1,3}, {1,1,3},
377 
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4}, /* EOB */
378 
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
379 
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
380 
  {64,0,4}, {64,0,4}, {64,0,4}, {64,0,4},
381 
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
382 
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
383 
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
384 
  {0,3,4}, {0,3,4}, {0,3,4}, {0,3,4},
385 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
386 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
387 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
388 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
389 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
390 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
391 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
392 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
393 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
394 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
395 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
396 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
397 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
398 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
399 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
400 
  {0,1,2}, {0,1,2}, {0,1,2}, {0,1,2},
401 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
402 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
403 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
404 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
405 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
406 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
407 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
408 
  {0,2,3}, {0,2,3}, {0,2,3}, {0,2,3},
409 
  {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
410 
  {0,4,5}, {0,4,5}, {0,4,5}, {0,4,5},
411 
  {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
412 
  {0,5,5}, {0,5,5}, {0,5,5}, {0,5,5},
413 
  {9,1,7}, {9,1,7}, {1,3,7}, {1,3,7},
414 
  {10,1,7}, {10,1,7}, {0,8,7}, {0,8,7},
415 
  {0,9,7}, {0,9,7}, {0,12,8}, {0,13,8},
416 
  {2,3,8}, {4,2,8}, {0,14,8}, {0,15,8}
417 
};
418 
 
419 
/* Table B-14, DCT coefficients table zero,
420 
 * codes 0000001000 ... 0000001111
421 
 */
422 
DCTtab DCTtab1[8] =
423 
{
424 
  {16,1,10}, {5,2,10}, {0,7,10}, {2,3,10},
425 
  {1,4,10}, {15,1,10}, {14,1,10}, {4,2,10}
426 
};
427 
 
428 
/* Table B-15, DCT coefficients table one,
429 
 * codes 000000100x ... 000000111x
430 
 */
431 
DCTtab DCTtab1a[8] =
432 
{
433 
  {5,2,9}, {5,2,9}, {14,1,9}, {14,1,9},
434 
  {2,4,10}, {16,1,10}, {15,1,9}, {15,1,9}
435 
};
436 
 
437 
/* Table B-14/15, DCT coefficients table zero / one,
438 
 * codes 000000010000 ... 000000011111
439 
 */
440 
DCTtab DCTtab2[16] =
441 
{
442 
  {0,11,12}, {8,2,12}, {4,3,12}, {0,10,12},
443 
  {2,4,12}, {7,2,12}, {21,1,12}, {20,1,12},
444 
  {0,9,12}, {19,1,12}, {18,1,12}, {1,5,12},
445 
  {3,3,12}, {0,8,12}, {6,2,12}, {17,1,12}
446 
};
447 
 
448 
/* Table B-14/15, DCT coefficients table zero / one,
449 
 * codes 0000000010000 ... 0000000011111
450 
 */
451 
DCTtab DCTtab3[16] =
452 
{
453 
  {10,2,13}, {9,2,13}, {5,3,13}, {3,4,13},
454 
  {2,5,13}, {1,7,13}, {1,6,13}, {0,15,13},
455 
  {0,14,13}, {0,13,13}, {0,12,13}, {26,1,13},
456 
  {25,1,13}, {24,1,13}, {23,1,13}, {22,1,13}
457 
};
458 
 
459 
/* Table B-14/15, DCT coefficients table zero / one,
460 
 * codes 00000000010000 ... 00000000011111
461 
 */
462 
DCTtab DCTtab4[16] =
463 
{
464 
  {0,31,14}, {0,30,14}, {0,29,14}, {0,28,14},
465 
  {0,27,14}, {0,26,14}, {0,25,14}, {0,24,14},
466 
  {0,23,14}, {0,22,14}, {0,21,14}, {0,20,14},
467 
  {0,19,14}, {0,18,14}, {0,17,14}, {0,16,14}
468 
};
469 
 
470 
/* Table B-14/15, DCT coefficients table zero / one,
471 
 * codes 000000000010000 ... 000000000011111
472 
 */
473 
DCTtab DCTtab5[16] =
474 
{
475 
  {0,40,15}, {0,39,15}, {0,38,15}, {0,37,15},
476 
  {0,36,15}, {0,35,15}, {0,34,15}, {0,33,15},
477 
  {0,32,15}, {1,14,15}, {1,13,15}, {1,12,15},
478 
  {1,11,15}, {1,10,15}, {1,9,15}, {1,8,15}
479 
};
480 
 
481 
/* Table B-14/15, DCT coefficients table zero / one,
482 
 * codes 0000000000010000 ... 0000000000011111
483 
 */
484 
DCTtab DCTtab6[16] =
485 
{
486 
  {1,18,16}, {1,17,16}, {1,16,16}, {1,15,16},
487 
  {6,3,16}, {16,2,16}, {15,2,16}, {14,2,16},
488 
  {13,2,16}, {12,2,16}, {11,2,16}, {31,1,16},
489 
  {30,1,16}, {29,1,16}, {28,1,16}, {27,1,16}
490 
};
491