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1 : edgomez 1054 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - MB coding -
5 :     *
6 :     * Copyright (C) 2002 Michael Militzer <isibaar@xvid.org>
7 :     *
8 :     * This program is free software ; you can redistribute it and/or modify
9 :     * it under the terms of the GNU General Public License as published by
10 :     * the Free Software Foundation ; either version 2 of the License, or
11 :     * (at your option) any later version.
12 :     *
13 :     * This program is distributed in the hope that it will be useful,
14 :     * but WITHOUT ANY WARRANTY ; without even the implied warranty of
15 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 :     * GNU General Public License for more details.
17 :     *
18 :     * You should have received a copy of the GNU General Public License
19 :     * along with this program ; if not, write to the Free Software
20 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 :     *
22 : edgomez 1161 * $Id: mbcoding.c,v 1.44.2.14 2003-10-01 23:23:01 edgomez Exp $
23 : edgomez 1054 *
24 :     ****************************************************************************/
25 : suxen_drol 118
26 : edgomez 851 #include <stdio.h>
27 : Isibaar 100 #include <stdlib.h>
28 : chl 995 #include <string.h>
29 :    
30 : Isibaar 3 #include "../portab.h"
31 : edgomez 851 #include "../global.h"
32 : Isibaar 3 #include "bitstream.h"
33 :     #include "zigzag.h"
34 :     #include "vlc_codes.h"
35 : Isibaar 100 #include "mbcoding.h"
36 : Isibaar 3
37 :     #include "../utils/mbfunctions.h"
38 :    
39 : edgomez 766 /* #define BIGLUT */
40 : edgomez 764
41 : edgomez 766 #ifdef BIGLUT
42 : edgomez 764 #define LEVELOFFSET 2048
43 :     #else
44 :     #define LEVELOFFSET 32
45 :     #endif
46 :    
47 :     static REVERSE_EVENT DCT3D[2][4096];
48 : Isibaar 3
49 : edgomez 766 #ifdef BIGLUT
50 : edgomez 764 static VLC coeff_VLC[2][2][4096][64];
51 : edgomez 851 VLC *intra_table;
52 : edgomez 1161 static VLC *inter_table;
53 : edgomez 764 #else
54 :     static VLC coeff_VLC[2][2][64][64];
55 :     #endif
56 : edgomez 451
57 : edgomez 851 /* not really MB related, but VLCs are only available here */
58 :     void bs_put_spritetrajectory(Bitstream * bs, const int val)
59 :     {
60 :     const int code = sprite_trajectory_code[val+16384].code;
61 :     const int len = sprite_trajectory_code[val+16384].len;
62 :     const int code2 = sprite_trajectory_len[len].code;
63 :     const int len2 = sprite_trajectory_len[len].len;
64 : edgomez 451
65 : edgomez 1053 #if 0
66 :     printf("GMC=%d Code/Len = %d / %d ",val, code,len);
67 :     printf("Code2 / Len2 = %d / %d \n",code2,len2);
68 :     #endif
69 : edgomez 851
70 :     BitstreamPutBits(bs, code2, len2);
71 :     if (len) BitstreamPutBits(bs, code, len);
72 :     }
73 :    
74 :     int bs_get_spritetrajectory(Bitstream * bs)
75 :     {
76 :     int i;
77 :     for (i = 0; i < 12; i++)
78 :     {
79 :     if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code)
80 :     {
81 :     BitstreamSkip(bs, sprite_trajectory_len[i].len);
82 :     return i;
83 :     }
84 :     }
85 :     return -1;
86 :     }
87 :    
88 : edgomez 195 void
89 :     init_vlc_tables(void)
90 : Isibaar 3 {
91 : edgomez 851 uint32_t i, j, k, intra, last, run, run_esc, level, level_esc, escape, escape_len, offset;
92 :     int32_t l;
93 : edgomez 78
94 : edgomez 766 #ifdef BIGLUT
95 : edgomez 851 intra_table = coeff_VLC[1];
96 : edgomez 1161 inter_table = coeff_VLC[0];
97 : edgomez 764 #endif
98 : Isibaar 3
99 : edgomez 195
100 : edgomez 764 for (intra = 0; intra < 2; intra++)
101 :     for (i = 0; i < 4096; i++)
102 :     DCT3D[intra][i].event.level = 0;
103 : edgomez 195
104 : edgomez 764 for (intra = 0; intra < 2; intra++)
105 :     for (last = 0; last < 2; last++)
106 :     {
107 :     for (run = 0; run < 63 + last; run++)
108 : edgomez 845 for (level = 0; level < (uint32_t)(32 << intra); level++)
109 : edgomez 764 {
110 : edgomez 766 #ifdef BIGLUT
111 : edgomez 764 offset = LEVELOFFSET;
112 :     #else
113 :     offset = !intra * LEVELOFFSET;
114 :     #endif
115 :     coeff_VLC[intra][last][level + offset][run].len = 128;
116 :     }
117 :     }
118 : Isibaar 3
119 : edgomez 764 for (intra = 0; intra < 2; intra++)
120 :     for (i = 0; i < 102; i++)
121 :     {
122 : edgomez 766 #ifdef BIGLUT
123 : edgomez 764 offset = LEVELOFFSET;
124 :     #else
125 :     offset = !intra * LEVELOFFSET;
126 :     #endif
127 : edgomez 816 for (j = 0; j < (uint32_t)(1 << (12 - coeff_tab[intra][i].vlc.len)); j++)
128 : edgomez 764 {
129 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len;
130 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event;
131 :     }
132 : edgomez 195
133 : edgomez 764 coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].code
134 :     = coeff_tab[intra][i].vlc.code << 1;
135 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len
136 :     = coeff_tab[intra][i].vlc.len + 1;
137 : edgomez 766 #ifndef BIGLUT
138 : edgomez 764 if (!intra)
139 :     #endif
140 :     {
141 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code
142 :     = (coeff_tab[intra][i].vlc.code << 1) | 1;
143 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len
144 :     = coeff_tab[intra][i].vlc.len + 1;
145 :     }
146 :     }
147 : edgomez 195
148 : edgomez 764 for (intra = 0; intra < 2; intra++)
149 :     for (last = 0; last < 2; last++)
150 :     for (run = 0; run < 63 + last; run++)
151 :     {
152 : edgomez 816 for (level = 1; level < (uint32_t)(32 << intra); level++)
153 : edgomez 764 {
154 : edgomez 766 if (level <= max_level[intra][last][run] && run <= max_run[intra][last][level])
155 :     continue;
156 :    
157 :     #ifdef BIGLUT
158 : edgomez 764 offset = LEVELOFFSET;
159 :     #else
160 :     offset = !intra * LEVELOFFSET;
161 :     #endif
162 : edgomez 766 level_esc = level - max_level[intra][last][run];
163 :     run_esc = run - 1 - max_run[intra][last][level];
164 : edgomez 851 /*use this test to use shorter esc2 codes when possible
165 :     if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc]
166 :     && !(coeff_VLC[intra][last][level_esc + offset][run].len + 7 + 1
167 :     > coeff_VLC[intra][last][level + offset][run_esc].code + 7 + 2))*/
168 : edgomez 766
169 :     if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc])
170 :     {
171 :     escape = ESCAPE1;
172 :     escape_len = 7 + 1;
173 :     run_esc = run;
174 :     }
175 :     else
176 :     {
177 : edgomez 816 if (run_esc <= max_run[intra][last][level] && level <= max_level[intra][last][run_esc])
178 : edgomez 764 {
179 : edgomez 766 escape = ESCAPE2;
180 :     escape_len = 7 + 2;
181 :     level_esc = level;
182 : edgomez 764 }
183 : edgomez 766 else
184 : edgomez 764 {
185 : edgomez 766 #ifndef BIGLUT
186 : edgomez 764 if (!intra)
187 :     #endif
188 :     {
189 : edgomez 766 coeff_VLC[intra][last][level + offset][run].code
190 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
191 :     coeff_VLC[intra][last][level + offset][run].len = 30;
192 :     coeff_VLC[intra][last][offset - level][run].code
193 : suxen_drol 883 = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-(int32_t)level & 0xfff) << 1) | 1;
194 : edgomez 766 coeff_VLC[intra][last][offset - level][run].len = 30;
195 : edgomez 764 }
196 : edgomez 766 continue;
197 : edgomez 764 }
198 : edgomez 766 }
199 :    
200 :     coeff_VLC[intra][last][level + offset][run].code
201 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
202 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code;
203 :     coeff_VLC[intra][last][level + offset][run].len
204 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
205 :     #ifndef BIGLUT
206 : edgomez 764 if (!intra)
207 :     #endif
208 : edgomez 766 {
209 :     coeff_VLC[intra][last][offset - level][run].code
210 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
211 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code | 1;
212 :     coeff_VLC[intra][last][offset - level][run].len
213 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
214 :     }
215 : Isibaar 3 }
216 : edgomez 766
217 :     #ifdef BIGLUT
218 : edgomez 851 for (level = 32 << intra; level < 2048; level++)
219 : edgomez 764 {
220 :     coeff_VLC[intra][last][level + offset][run].code
221 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
222 :     coeff_VLC[intra][last][level + offset][run].len = 30;
223 : Isibaar 100
224 : edgomez 764 coeff_VLC[intra][last][offset - level][run].code
225 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1;
226 :     coeff_VLC[intra][last][offset - level][run].len = 30;
227 : Isibaar 100 }
228 : edgomez 764 #else
229 :     if (!intra)
230 :     {
231 :     coeff_VLC[intra][last][0][run].code
232 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1;
233 :     coeff_VLC[intra][last][0][run].len = 30;
234 :     }
235 :     #endif
236 : Isibaar 3 }
237 : edgomez 851 /* init sprite_trajectory tables */
238 :     /* even if GMC is not specified (it might be used later...) */
239 : edgomez 845
240 : edgomez 851 sprite_trajectory_code[0+16384].code = 0;
241 :     sprite_trajectory_code[0+16384].len = 0;
242 :     for (k=0;k<14;k++)
243 :     {
244 :     int limit = (1<<k);
245 : edgomez 845
246 : edgomez 851 for (l=-(2*limit-1); l <= -limit; l++)
247 :     {
248 :     sprite_trajectory_code[l+16384].code = (2*limit-1)+l;
249 :     sprite_trajectory_code[l+16384].len = k+1;
250 :     }
251 :    
252 :     for (l=limit; l<= 2*limit-1; l++)
253 :     {
254 : edgomez 1161 sprite_trajectory_code[l+16384].code = l;
255 : edgomez 851 sprite_trajectory_code[l+16384].len = k+1;
256 :     }
257 :     }
258 : Isibaar 3 }
259 :    
260 : edgomez 195 static __inline void
261 :     CodeVector(Bitstream * bs,
262 :     int32_t value,
263 :     int32_t f_code,
264 :     Statistics * pStat)
265 : Isibaar 3 {
266 : edgomez 78
267 : Isibaar 3 const int scale_factor = 1 << (f_code - 1);
268 :     const int cmp = scale_factor << 5;
269 :    
270 : edgomez 195 if (value < (-1 * cmp))
271 : Isibaar 3 value += 64 * scale_factor;
272 : edgomez 195
273 :     if (value > (cmp - 1))
274 : Isibaar 3 value -= 64 * scale_factor;
275 :    
276 : edgomez 78 pStat->iMvSum += value * value;
277 :     pStat->iMvCount++;
278 : Isibaar 3
279 : edgomez 78 if (value == 0) {
280 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[32].code,
281 :     mb_motion_table[32].len);
282 : edgomez 78 } else {
283 : Isibaar 3 uint16_t length, code, mv_res, sign;
284 : edgomez 195
285 : Isibaar 3 length = 16 << f_code;
286 :     f_code--;
287 : edgomez 195
288 : Isibaar 3 sign = (value < 0);
289 :    
290 : edgomez 195 if (value >= length)
291 : Isibaar 3 value -= 2 * length;
292 : edgomez 195 else if (value < -length)
293 : Isibaar 3 value += 2 * length;
294 :    
295 : edgomez 195 if (sign)
296 : Isibaar 3 value = -value;
297 :    
298 :     value--;
299 :     mv_res = value & ((1 << f_code) - 1);
300 :     code = ((value - mv_res) >> f_code) + 1;
301 :    
302 : edgomez 195 if (sign)
303 : Isibaar 3 code = -code;
304 :    
305 :     code += 32;
306 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[code].code,
307 :     mb_motion_table[code].len);
308 :    
309 :     if (f_code)
310 : Isibaar 3 BitstreamPutBits(bs, mv_res, f_code);
311 : edgomez 78 }
312 :    
313 : Isibaar 3 }
314 :    
315 : edgomez 766 #ifdef BIGLUT
316 : edgomez 764
317 : edgomez 195 static __inline void
318 :     CodeCoeff(Bitstream * bs,
319 :     const int16_t qcoeff[64],
320 :     VLC * table,
321 :     const uint16_t * zigzag,
322 :     uint16_t intra)
323 : edgomez 78 {
324 :    
325 : Isibaar 3 uint32_t j, last;
326 :     short v;
327 :     VLC *vlc;
328 : edgomez 195
329 : Isibaar 3 j = intra;
330 : Isibaar 116 last = intra;
331 : Isibaar 3
332 : edgomez 195 while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
333 :     j++;
334 :    
335 : Isibaar 3 do {
336 : edgomez 764 vlc = table + 64 * 2048 + (v << 6) + j - last;
337 : Isibaar 116 last = ++j;
338 : Isibaar 153
339 : edgomez 677 /* count zeroes */
340 : edgomez 195 while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
341 :     j++;
342 :    
343 : edgomez 677 /* write code */
344 : edgomez 195 if (j != 64) {
345 : Isibaar 3 BitstreamPutBits(bs, vlc->code, vlc->len);
346 :     } else {
347 : edgomez 764 vlc += 64 * 4096;
348 : Isibaar 3 BitstreamPutBits(bs, vlc->code, vlc->len);
349 :     break;
350 :     }
351 : edgomez 195 } while (1);
352 : edgomez 78
353 : Isibaar 3 }
354 :    
355 : edgomez 851
356 :    
357 :     /* returns the number of bits required to encode qcoeff */
358 :     int
359 :     CodeCoeff_CalcBits(const int16_t qcoeff[64],
360 :     VLC * table,
361 :     const uint16_t * zigzag,
362 :     uint16_t intra)
363 :     {
364 :     int bits = 0;
365 :     uint32_t j, last;
366 :     short v;
367 :     VLC *vlc;
368 :    
369 :     j = intra;
370 :     last = intra;
371 :    
372 :     while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
373 :     j++;
374 :    
375 :     if (j >= 64) return 0; /* empty block */
376 :    
377 :     do {
378 :     vlc = table + 64 * 2048 + (v << 6) + j - last;
379 :     last = ++j;
380 :    
381 :     /* count zeroes */
382 :     while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
383 :     j++;
384 :    
385 :     /* write code */
386 :     if (j != 64) {
387 :     bits += vlc->len;
388 :     } else {
389 :     vlc += 64 * 4096;
390 :     bits += vlc->len;
391 :     break;
392 :     }
393 :     } while (1);
394 :    
395 :     return bits;
396 :     }
397 :    
398 :    
399 : edgomez 764 #else
400 :    
401 :     static __inline void
402 :     CodeCoeffInter(Bitstream * bs,
403 :     const int16_t qcoeff[64],
404 :     const uint16_t * zigzag)
405 :     {
406 :     uint32_t i, run, prev_run, code, len;
407 :     int32_t level, prev_level, level_shifted;
408 :    
409 :     i = 0;
410 :     run = 0;
411 :    
412 :     while (!(level = qcoeff[zigzag[i++]]))
413 :     run++;
414 :    
415 :     prev_level = level;
416 :     prev_run = run;
417 :     run = 0;
418 :    
419 :     while (i < 64)
420 :     {
421 :     if ((level = qcoeff[zigzag[i++]]) != 0)
422 :     {
423 :     level_shifted = prev_level + 32;
424 :     if (!(level_shifted & -64))
425 :     {
426 :     code = coeff_VLC[0][0][level_shifted][prev_run].code;
427 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
428 :     }
429 :     else
430 :     {
431 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
432 :     len = 30;
433 :     }
434 :     BitstreamPutBits(bs, code, len);
435 :     prev_level = level;
436 :     prev_run = run;
437 :     run = 0;
438 :     }
439 :     else
440 :     run++;
441 :     }
442 :    
443 :     level_shifted = prev_level + 32;
444 :     if (!(level_shifted & -64))
445 :     {
446 :     code = coeff_VLC[0][1][level_shifted][prev_run].code;
447 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
448 :     }
449 :     else
450 :     {
451 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
452 :     len = 30;
453 :     }
454 :     BitstreamPutBits(bs, code, len);
455 :     }
456 :    
457 :     static __inline void
458 :     CodeCoeffIntra(Bitstream * bs,
459 :     const int16_t qcoeff[64],
460 :     const uint16_t * zigzag)
461 :     {
462 :     uint32_t i, abs_level, run, prev_run, code, len;
463 :     int32_t level, prev_level;
464 :    
465 :     i = 1;
466 :     run = 0;
467 :    
468 : edgomez 851 while (i<64 && !(level = qcoeff[zigzag[i++]]))
469 : edgomez 764 run++;
470 :    
471 :     prev_level = level;
472 :     prev_run = run;
473 :     run = 0;
474 :    
475 :     while (i < 64)
476 :     {
477 :     if ((level = qcoeff[zigzag[i++]]) != 0)
478 :     {
479 : edgomez 982 abs_level = abs(prev_level);
480 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
481 :     code = coeff_VLC[1][0][abs_level][prev_run].code;
482 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
483 :     if (len != 128)
484 :     code |= (prev_level < 0);
485 :     else
486 :     {
487 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
488 :     len = 30;
489 :     }
490 :     BitstreamPutBits(bs, code, len);
491 :     prev_level = level;
492 :     prev_run = run;
493 :     run = 0;
494 :     }
495 :     else
496 :     run++;
497 :     }
498 :    
499 : edgomez 982 abs_level = abs(prev_level);
500 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
501 :     code = coeff_VLC[1][1][abs_level][prev_run].code;
502 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
503 :     if (len != 128)
504 :     code |= (prev_level < 0);
505 :     else
506 :     {
507 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
508 :     len = 30;
509 :     }
510 :     BitstreamPutBits(bs, code, len);
511 :     }
512 :    
513 : edgomez 851
514 :    
515 :     /* returns the number of bits required to encode qcoeff */
516 :    
517 : edgomez 1161 int
518 : edgomez 851 CodeCoeffIntra_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
519 :     {
520 :     int bits = 0;
521 :     uint32_t i, abs_level, run, prev_run, len;
522 :     int32_t level, prev_level;
523 :    
524 :     i = 1;
525 :     run = 0;
526 :    
527 :     while (i<64 && !(level = qcoeff[zigzag[i++]]))
528 :     run++;
529 :    
530 :     if (i >= 64) return 0; /* empty block */
531 :    
532 :     prev_level = level;
533 :     prev_run = run;
534 :     run = 0;
535 :    
536 :     while (i < 64)
537 :     {
538 :     if ((level = qcoeff[zigzag[i++]]) != 0)
539 :     {
540 : edgomez 982 abs_level = abs(prev_level);
541 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
542 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
543 :     bits += len!=128 ? len : 30;
544 :    
545 :     prev_level = level;
546 :     prev_run = run;
547 :     run = 0;
548 :     }
549 :     else
550 :     run++;
551 :     }
552 :    
553 : edgomez 982 abs_level = abs(prev_level);
554 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
555 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
556 :     bits += len!=128 ? len : 30;
557 :    
558 :     return bits;
559 :     }
560 :    
561 :     int
562 :     CodeCoeffInter_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
563 :     {
564 :     uint32_t i, run, prev_run, len;
565 :     int32_t level, prev_level, level_shifted;
566 :     int bits = 0;
567 :    
568 :     i = 0;
569 :     run = 0;
570 :    
571 :     while (!(level = qcoeff[zigzag[i++]]))
572 :     run++;
573 :    
574 :     prev_level = level;
575 :     prev_run = run;
576 :     run = 0;
577 :    
578 :     while (i < 64) {
579 :     if ((level = qcoeff[zigzag[i++]]) != 0) {
580 :     level_shifted = prev_level + 32;
581 :     if (!(level_shifted & -64))
582 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
583 :     else
584 :     len = 30;
585 :    
586 :     bits += len;
587 :     prev_level = level;
588 :     prev_run = run;
589 :     run = 0;
590 :     }
591 :     else
592 :     run++;
593 :     }
594 :    
595 :     level_shifted = prev_level + 32;
596 :     if (!(level_shifted & -64))
597 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
598 :     else
599 :     len = 30;
600 :     bits += len;
601 :    
602 :     return bits;
603 :     }
604 :    
605 :    
606 : edgomez 764 #endif
607 :    
608 : suxen_drol 926
609 :     static int iDQtab[5] = {
610 :     1, 0, -1 /* no change */, 2, 3
611 :     };
612 :     #define DQ_VALUE2INDEX(value) iDQtab[(value)+2]
613 :    
614 :    
615 : edgomez 851 static __inline void
616 :     CodeBlockIntra(const FRAMEINFO * const frame,
617 : edgomez 195 const MACROBLOCK * pMB,
618 :     int16_t qcoeff[6 * 64],
619 : edgomez 78 Bitstream * bs,
620 :     Statistics * pStat)
621 : Isibaar 3 {
622 : edgomez 78
623 : Isibaar 3 uint32_t i, mcbpc, cbpy, bits;
624 :    
625 :     cbpy = pMB->cbp >> 2;
626 :    
627 : edgomez 1053 /* write mcbpc */
628 : edgomez 195 if (frame->coding_type == I_VOP) {
629 : edgomez 78 mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2);
630 : edgomez 195 BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code,
631 :     mcbpc_intra_tab[mcbpc].len);
632 :     } else {
633 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
634 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
635 :     mcbpc_inter_tab[mcbpc].len);
636 : Isibaar 28 }
637 : Isibaar 3
638 : edgomez 1053 /* ac prediction flag */
639 : edgomez 195 if (pMB->acpred_directions[0])
640 : edgomez 78 BitstreamPutBits(bs, 1, 1);
641 : Isibaar 3 else
642 : edgomez 78 BitstreamPutBits(bs, 0, 1);
643 : Isibaar 3
644 : edgomez 1053 /* write cbpy */
645 : edgomez 958 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
646 : Isibaar 3
647 : edgomez 1053 /* write dquant */
648 : edgomez 195 if (pMB->mode == MODE_INTRA_Q)
649 : suxen_drol 926 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
650 : Isibaar 3
651 : edgomez 1053 /* write interlacing */
652 : edgomez 949 if (frame->vol_flags & XVID_VOL_INTERLACING) {
653 : h 69 BitstreamPutBit(bs, pMB->field_dct);
654 :     }
655 : edgomez 1053 /* code block coeffs */
656 : edgomez 195 for (i = 0; i < 6; i++) {
657 :     if (i < 4)
658 :     BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code,
659 :     dcy_tab[qcoeff[i * 64 + 0] + 255].len);
660 : Isibaar 3 else
661 : edgomez 195 BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code,
662 :     dcc_tab[qcoeff[i * 64 + 0] + 255].len);
663 :    
664 :     if (pMB->cbp & (1 << (5 - i))) {
665 : edgomez 851 const uint16_t *scan_table =
666 : edgomez 949 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
667 : edgomez 851 scan_tables[2] : scan_tables[pMB->acpred_directions[i]];
668 :    
669 : Isibaar 3 bits = BitstreamPos(bs);
670 :    
671 : edgomez 766 #ifdef BIGLUT
672 : edgomez 851 CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1);
673 : edgomez 764 #else
674 : edgomez 851 CodeCoeffIntra(bs, &qcoeff[i * 64], scan_table);
675 : edgomez 764 #endif
676 : edgomez 851
677 : Isibaar 3 bits = BitstreamPos(bs) - bits;
678 :     pStat->iTextBits += bits;
679 :     }
680 :     }
681 : edgomez 78
682 : Isibaar 3 }
683 :    
684 :    
685 : edgomez 195 static void
686 : edgomez 851 CodeBlockInter(const FRAMEINFO * const frame,
687 : edgomez 195 const MACROBLOCK * pMB,
688 :     int16_t qcoeff[6 * 64],
689 : edgomez 78 Bitstream * bs,
690 :     Statistics * pStat)
691 : Isibaar 3 {
692 : edgomez 78
693 : Isibaar 3 int32_t i;
694 :     uint32_t bits, mcbpc, cbpy;
695 :    
696 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
697 : Isibaar 3 cbpy = 15 - (pMB->cbp >> 2);
698 :    
699 : edgomez 1053 /* write mcbpc */
700 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
701 :     mcbpc_inter_tab[mcbpc].len);
702 : Isibaar 3
703 : edgomez 851 if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) )
704 : edgomez 1053 BitstreamPutBit(bs, pMB->mcsel); /* mcsel: '0'=local motion, '1'=GMC */
705 : edgomez 851
706 : edgomez 1053 /* write cbpy */
707 : edgomez 958 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
708 : Isibaar 3
709 : edgomez 1053 /* write dquant */
710 : edgomez 195 if (pMB->mode == MODE_INTER_Q)
711 : suxen_drol 926 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
712 : edgomez 195
713 : edgomez 1053 /* interlacing */
714 : edgomez 949 if (frame->vol_flags & XVID_VOL_INTERLACING) {
715 : h 388 if (pMB->cbp) {
716 :     BitstreamPutBit(bs, pMB->field_dct);
717 : edgomez 1038 DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", pMB->field_dct);
718 : h 388 }
719 : h 69
720 : edgomez 1053 /* if inter block, write field ME flag */
721 : edgomez 195 if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) {
722 : h 69 BitstreamPutBit(bs, pMB->field_pred);
723 : edgomez 1038 DPRINTF(XVID_DEBUG_MB,"codep: field_pred: %i\n", pMB->field_pred);
724 : h 69
725 : edgomez 1053 /* write field prediction references */
726 : edgomez 195 if (pMB->field_pred) {
727 : h 69 BitstreamPutBit(bs, pMB->field_for_top);
728 :     BitstreamPutBit(bs, pMB->field_for_bot);
729 :     }
730 :     }
731 :     }
732 : edgomez 1053 /* code motion vector(s) if motion is local */
733 : edgomez 851 if (!pMB->mcsel)
734 :     for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) {
735 :     CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat);
736 :     CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat);
737 :     }
738 : Isibaar 3
739 :     bits = BitstreamPos(bs);
740 : edgomez 195
741 : edgomez 1053 /* code block coeffs */
742 : edgomez 195 for (i = 0; i < 6; i++)
743 :     if (pMB->cbp & (1 << (5 - i)))
744 : edgomez 851 {
745 :     const uint16_t *scan_table =
746 : edgomez 949 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
747 : edgomez 851 scan_tables[2] : scan_tables[0];
748 :    
749 : edgomez 766 #ifdef BIGLUT
750 : edgomez 851 CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0);
751 : edgomez 764 #else
752 : edgomez 851 CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
753 : edgomez 764 #endif
754 : edgomez 851 }
755 : Isibaar 3
756 :     bits = BitstreamPos(bs) - bits;
757 :     pStat->iTextBits += bits;
758 :     }
759 :    
760 :    
761 : edgomez 195 void
762 : edgomez 851 MBCoding(const FRAMEINFO * const frame,
763 : edgomez 195 MACROBLOCK * pMB,
764 :     int16_t qcoeff[6 * 64],
765 :     Bitstream * bs,
766 :     Statistics * pStat)
767 : Isibaar 3 {
768 : edgomez 1161 if (frame->coding_type != I_VOP)
769 : edgomez 1053 BitstreamPutBit(bs, 0); /* not_coded */
770 : edgomez 1161
771 : chl 335 if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
772 : suxen_drol 136 CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
773 : Isibaar 3 else
774 : suxen_drol 136 CodeBlockInter(frame, pMB, qcoeff, bs, pStat);
775 : edgomez 78
776 : Isibaar 3 }
777 :    
778 : edgomez 1053
779 :     /* moved to mbcoding.h so that in can be 'static __inline' */
780 :     #if 0
781 : chl 347 void
782 :     MBSkip(Bitstream * bs)
783 :     {
784 : edgomez 1053 BitstreamPutBit(bs, 1); /* not coded */
785 : chl 347 }
786 : edgomez 1053 #endif
787 : chl 347
788 : edgomez 851 /***************************************************************
789 :     * bframe encoding start
790 :     ***************************************************************/
791 : suxen_drol 118
792 : edgomez 453 /*
793 : edgomez 851 mbtype
794 :     0 1b direct(h263) mvdb
795 :     1 01b interpolate mc+q dbquant, mvdf, mvdb
796 :     2 001b backward mc+q dbquant, mvdb
797 :     3 0001b forward mc+q dbquant, mvdf
798 :     */
799 : Isibaar 3
800 : edgomez 851 static __inline void
801 :     put_bvop_mbtype(Bitstream * bs,
802 :     int value)
803 :     {
804 :     switch (value) {
805 :     case MODE_FORWARD:
806 :     BitstreamPutBit(bs, 0);
807 :     case MODE_BACKWARD:
808 :     BitstreamPutBit(bs, 0);
809 :     case MODE_INTERPOLATE:
810 :     BitstreamPutBit(bs, 0);
811 :     case MODE_DIRECT:
812 :     BitstreamPutBit(bs, 1);
813 :     default:
814 :     break;
815 :     }
816 :     }
817 :    
818 :     /*
819 :     dbquant
820 :     -2 10b
821 :     0 0b
822 :     +2 11b
823 :     */
824 :    
825 :     static __inline void
826 :     put_bvop_dbquant(Bitstream * bs,
827 :     int value)
828 :     {
829 :     switch (value) {
830 :     case 0:
831 :     BitstreamPutBit(bs, 0);
832 :     return;
833 :    
834 :     case -2:
835 :     BitstreamPutBit(bs, 1);
836 :     BitstreamPutBit(bs, 0);
837 :     return;
838 :    
839 :     case 2:
840 :     BitstreamPutBit(bs, 1);
841 :     BitstreamPutBit(bs, 1);
842 :     return;
843 :    
844 : edgomez 1053 default:; /* invalid */
845 : edgomez 851 }
846 :     }
847 :    
848 :    
849 :    
850 :     void
851 :     MBCodingBVOP(const MACROBLOCK * mb,
852 :     const int16_t qcoeff[6 * 64],
853 :     const int32_t fcode,
854 :     const int32_t bcode,
855 :     Bitstream * bs,
856 :     Statistics * pStat,
857 :     int direction)
858 :     {
859 :     int vcode = fcode;
860 :     unsigned int i;
861 :    
862 :     /* ------------------------------------------------------------------
863 :     when a block is skipped it is decoded DIRECT(0,0)
864 :     hence is interpolated from forward & backward frames
865 :     ------------------------------------------------------------------ */
866 :    
867 :     if (mb->mode == MODE_DIRECT_NONE_MV) {
868 : edgomez 1053 BitstreamPutBit(bs, 1); /* skipped */
869 : edgomez 851 return;
870 :     }
871 :    
872 : edgomez 1053 BitstreamPutBit(bs, 0); /* not skipped */
873 : edgomez 851
874 :     if (mb->cbp == 0) {
875 : edgomez 1053 BitstreamPutBit(bs, 1); /* cbp == 0 */
876 : edgomez 851 } else {
877 : edgomez 1053 BitstreamPutBit(bs, 0); /* cbp == xxx */
878 : edgomez 851 }
879 :    
880 :     put_bvop_mbtype(bs, mb->mode);
881 :    
882 :     if (mb->cbp) {
883 :     BitstreamPutBits(bs, mb->cbp, 6);
884 :     }
885 :    
886 :     if (mb->mode != MODE_DIRECT && mb->cbp != 0) {
887 : edgomez 1053 put_bvop_dbquant(bs, 0); /* todo: mb->dquant = 0 */
888 : edgomez 851 }
889 :    
890 :     switch (mb->mode) {
891 :     case MODE_INTERPOLATE:
892 : edgomez 1053 CodeVector(bs, mb->pmvs[1].x, vcode, pStat); /* forward vector of interpolate mode */
893 : edgomez 851 CodeVector(bs, mb->pmvs[1].y, vcode, pStat);
894 :     case MODE_BACKWARD:
895 :     vcode = bcode;
896 :     case MODE_FORWARD:
897 :     CodeVector(bs, mb->pmvs[0].x, vcode, pStat);
898 :     CodeVector(bs, mb->pmvs[0].y, vcode, pStat);
899 :     break;
900 :     case MODE_DIRECT:
901 : edgomez 1053 CodeVector(bs, mb->pmvs[3].x, 1, pStat); /* fcode is always 1 for delta vector */
902 :     CodeVector(bs, mb->pmvs[3].y, 1, pStat); /* prediction is always (0,0) */
903 : edgomez 851 default: break;
904 :     }
905 :    
906 :     for (i = 0; i < 6; i++) {
907 :     if (mb->cbp & (1 << (5 - i))) {
908 :     #ifdef BIGLUT
909 :     CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0);
910 :     #else
911 :     CodeCoeffInter(bs, &qcoeff[i * 64], scan_tables[0]);
912 :     #endif
913 :     }
914 :     }
915 :     }
916 :    
917 :    
918 :    
919 :     /***************************************************************
920 :     * decoding stuff starts here *
921 :     ***************************************************************/
922 :    
923 :    
924 : edgomez 1053 /*
925 :     * for IVOP addbits == 0
926 :     * for PVOP addbits == fcode - 1
927 :     * for BVOP addbits == max(fcode,bcode) - 1
928 :     * returns true or false
929 :     */
930 : edgomez 1161 int
931 : suxen_drol 248 check_resync_marker(Bitstream * bs, int addbits)
932 :     {
933 :     uint32_t nbits;
934 :     uint32_t code;
935 :     uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
936 :    
937 :     nbits = BitstreamNumBitsToByteAlign(bs);
938 :     code = BitstreamShowBits(bs, nbits);
939 :    
940 :     if (code == (((uint32_t)1 << (nbits - 1)) - 1))
941 :     {
942 :     return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER;
943 :     }
944 :    
945 :     return 0;
946 :     }
947 :    
948 :    
949 :    
950 : edgomez 195 int
951 :     get_mcbpc_intra(Bitstream * bs)
952 : Isibaar 3 {
953 : edgomez 78
954 : Isibaar 3 uint32_t index;
955 : edgomez 195
956 : suxen_drol 248 index = BitstreamShowBits(bs, 9);
957 : Isibaar 3 index >>= 3;
958 :    
959 :     BitstreamSkip(bs, mcbpc_intra_table[index].len);
960 : edgomez 78
961 : Isibaar 3 return mcbpc_intra_table[index].code;
962 : edgomez 78
963 : Isibaar 3 }
964 :    
965 : edgomez 195 int
966 :     get_mcbpc_inter(Bitstream * bs)
967 : Isibaar 3 {
968 : edgomez 78
969 : Isibaar 3 uint32_t index;
970 : edgomez 1161
971 : edgomez 851 index = MIN(BitstreamShowBits(bs, 9), 256);
972 : edgomez 195
973 :     BitstreamSkip(bs, mcbpc_inter_table[index].len);
974 : edgomez 78
975 : Isibaar 3 return mcbpc_inter_table[index].code;
976 : edgomez 78
977 : Isibaar 3 }
978 :    
979 : edgomez 195 int
980 :     get_cbpy(Bitstream * bs,
981 :     int intra)
982 : Isibaar 3 {
983 : edgomez 78
984 : Isibaar 3 int cbpy;
985 :     uint32_t index = BitstreamShowBits(bs, 6);
986 :    
987 :     BitstreamSkip(bs, cbpy_table[index].len);
988 :     cbpy = cbpy_table[index].code;
989 :    
990 : edgomez 195 if (!intra)
991 : Isibaar 3 cbpy = 15 - cbpy;
992 :    
993 :     return cbpy;
994 : edgomez 78
995 : Isibaar 3 }
996 :    
997 : edgomez 851 static __inline int
998 : edgomez 195 get_mv_data(Bitstream * bs)
999 : Isibaar 3 {
1000 : edgomez 78
1001 : Isibaar 3 uint32_t index;
1002 :    
1003 : edgomez 195 if (BitstreamGetBit(bs))
1004 : Isibaar 3 return 0;
1005 : edgomez 195
1006 : Isibaar 3 index = BitstreamShowBits(bs, 12);
1007 :    
1008 : edgomez 195 if (index >= 512) {
1009 : Isibaar 3 index = (index >> 8) - 2;
1010 :     BitstreamSkip(bs, TMNMVtab0[index].len);
1011 :     return TMNMVtab0[index].code;
1012 :     }
1013 : edgomez 195
1014 :     if (index >= 128) {
1015 : Isibaar 3 index = (index >> 2) - 32;
1016 :     BitstreamSkip(bs, TMNMVtab1[index].len);
1017 :     return TMNMVtab1[index].code;
1018 :     }
1019 :    
1020 : edgomez 195 index -= 4;
1021 : Isibaar 3
1022 :     BitstreamSkip(bs, TMNMVtab2[index].len);
1023 :     return TMNMVtab2[index].code;
1024 : edgomez 78
1025 : Isibaar 3 }
1026 :    
1027 : edgomez 195 int
1028 :     get_mv(Bitstream * bs,
1029 :     int fcode)
1030 : Isibaar 3 {
1031 : edgomez 78
1032 : Isibaar 3 int data;
1033 :     int res;
1034 :     int mv;
1035 :     int scale_fac = 1 << (fcode - 1);
1036 :    
1037 :     data = get_mv_data(bs);
1038 : edgomez 195
1039 :     if (scale_fac == 1 || data == 0)
1040 : Isibaar 3 return data;
1041 :    
1042 :     res = BitstreamGetBits(bs, fcode - 1);
1043 : edgomez 982 mv = ((abs(data) - 1) * scale_fac) + res + 1;
1044 : edgomez 195
1045 : Isibaar 3 return data < 0 ? -mv : mv;
1046 : edgomez 78
1047 : Isibaar 3 }
1048 :    
1049 : edgomez 195 int
1050 :     get_dc_dif(Bitstream * bs,
1051 :     uint32_t dc_size)
1052 : Isibaar 3 {
1053 : edgomez 78
1054 : Isibaar 3 int code = BitstreamGetBits(bs, dc_size);
1055 :     int msb = code >> (dc_size - 1);
1056 :    
1057 : edgomez 195 if (msb == 0)
1058 :     return (-1 * (code ^ ((1 << dc_size) - 1)));
1059 : Isibaar 3
1060 :     return code;
1061 : edgomez 78
1062 : Isibaar 3 }
1063 :    
1064 : edgomez 195 int
1065 :     get_dc_size_lum(Bitstream * bs)
1066 : Isibaar 3 {
1067 : edgomez 78
1068 : Isibaar 3 int code, i;
1069 : edgomez 195
1070 : Isibaar 3 code = BitstreamShowBits(bs, 11);
1071 :    
1072 : edgomez 195 for (i = 11; i > 3; i--) {
1073 :     if (code == 1) {
1074 : Isibaar 3 BitstreamSkip(bs, i);
1075 :     return i + 1;
1076 :     }
1077 :     code >>= 1;
1078 :     }
1079 :    
1080 :     BitstreamSkip(bs, dc_lum_tab[code].len);
1081 :     return dc_lum_tab[code].code;
1082 : edgomez 78
1083 : Isibaar 3 }
1084 :    
1085 :    
1086 : edgomez 195 int
1087 :     get_dc_size_chrom(Bitstream * bs)
1088 : Isibaar 3 {
1089 : edgomez 78
1090 : Isibaar 3 uint32_t code, i;
1091 : edgomez 195
1092 : Isibaar 3 code = BitstreamShowBits(bs, 12);
1093 :    
1094 : edgomez 195 for (i = 12; i > 2; i--) {
1095 :     if (code == 1) {
1096 : Isibaar 3 BitstreamSkip(bs, i);
1097 :     return i;
1098 :     }
1099 :     code >>= 1;
1100 :     }
1101 :    
1102 :     return 3 - BitstreamGetBits(bs, 2);
1103 : edgomez 78
1104 : Isibaar 3 }
1105 :    
1106 : edgomez 453 static __inline int
1107 :     get_coeff(Bitstream * bs,
1108 :     int *run,
1109 :     int *last,
1110 :     int intra,
1111 :     int short_video_header)
1112 :     {
1113 :    
1114 :     uint32_t mode;
1115 :     int32_t level;
1116 : edgomez 764 REVERSE_EVENT *reverse_event;
1117 : edgomez 453
1118 : edgomez 677 if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */
1119 : edgomez 453 intra = 0;
1120 :    
1121 : edgomez 764 if (BitstreamShowBits(bs, 7) != ESCAPE) {
1122 :     reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)];
1123 : edgomez 453
1124 : edgomez 764 if ((level = reverse_event->event.level) == 0)
1125 :     goto error;
1126 : edgomez 453
1127 : edgomez 764 *last = reverse_event->event.last;
1128 :     *run = reverse_event->event.run;
1129 : edgomez 453
1130 : edgomez 764 BitstreamSkip(bs, reverse_event->len);
1131 :    
1132 :     return BitstreamGetBits(bs, 1) ? -level : level;
1133 : edgomez 453 }
1134 :    
1135 : edgomez 764 BitstreamSkip(bs, 7);
1136 :    
1137 : edgomez 453 if (short_video_header) {
1138 : edgomez 677 /* escape mode 4 - H.263 type, only used if short_video_header = 1 */
1139 : edgomez 453 *last = BitstreamGetBit(bs);
1140 :     *run = BitstreamGetBits(bs, 6);
1141 :     level = BitstreamGetBits(bs, 8);
1142 :    
1143 :     if (level == 0 || level == 128)
1144 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d\n", level);
1145 : edgomez 453
1146 : edgomez 764 return (level << 24) >> 24;
1147 : edgomez 453 }
1148 :    
1149 :     mode = BitstreamShowBits(bs, 2);
1150 :    
1151 :     if (mode < 3) {
1152 :     BitstreamSkip(bs, (mode == 2) ? 2 : 1);
1153 :    
1154 : edgomez 764 reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)];
1155 :    
1156 :     if ((level = reverse_event->event.level) == 0)
1157 : edgomez 453 goto error;
1158 :    
1159 : edgomez 764 *last = reverse_event->event.last;
1160 :     *run = reverse_event->event.run;
1161 : edgomez 453
1162 : edgomez 764 BitstreamSkip(bs, reverse_event->len);
1163 : edgomez 453
1164 : edgomez 677 if (mode < 2) /* first escape mode, level is offset */
1165 : edgomez 764 level += max_level[intra][*last][*run];
1166 :     else /* second escape mode, run is offset */
1167 :     *run += max_run[intra][*last][level] + 1;
1168 : edgomez 453
1169 : edgomez 764 return BitstreamGetBits(bs, 1) ? -level : level;
1170 : edgomez 453 }
1171 : edgomez 764
1172 : edgomez 677 /* third escape mode - fixed length codes */
1173 : edgomez 453 BitstreamSkip(bs, 2);
1174 :     *last = BitstreamGetBits(bs, 1);
1175 :     *run = BitstreamGetBits(bs, 6);
1176 : edgomez 677 BitstreamSkip(bs, 1); /* marker */
1177 : edgomez 453 level = BitstreamGetBits(bs, 12);
1178 : edgomez 677 BitstreamSkip(bs, 1); /* marker */
1179 : edgomez 453
1180 : edgomez 764 return (level << 20) >> 20;
1181 : edgomez 453
1182 :     error:
1183 :     *run = VLC_ERROR;
1184 :     return 0;
1185 :     }
1186 :    
1187 : edgomez 195 void
1188 :     get_intra_block(Bitstream * bs,
1189 :     int16_t * block,
1190 :     int direction,
1191 :     int coeff)
1192 : Isibaar 3 {
1193 : edgomez 78
1194 : edgomez 195 const uint16_t *scan = scan_tables[direction];
1195 : edgomez 851 int level, run, last;
1196 : Isibaar 3
1197 : edgomez 195 do {
1198 : Isibaar 3 level = get_coeff(bs, &run, &last, 1, 0);
1199 : edgomez 195 if (run == -1) {
1200 : suxen_drol 1032 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1201 : Isibaar 3 break;
1202 :     }
1203 :     coeff += run;
1204 : edgomez 195 block[scan[coeff]] = level;
1205 : suxen_drol 252
1206 : edgomez 1038 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[coeff], level);
1207 : edgomez 1053 #if 0
1208 :     DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[coeff], level, BitstreamShowBits(bs, 32));
1209 :     #endif
1210 : suxen_drol 252
1211 : suxen_drol 759 if (level < -2047 || level > 2047) {
1212 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR,"warning: intra_overflow %i\n", level);
1213 : Isibaar 3 }
1214 :     coeff++;
1215 :     } while (!last);
1216 : edgomez 78
1217 : Isibaar 3 }
1218 :    
1219 : edgomez 195 void
1220 :     get_inter_block(Bitstream * bs,
1221 : edgomez 851 int16_t * block,
1222 :     int direction)
1223 : Isibaar 3 {
1224 : edgomez 78
1225 : edgomez 851 const uint16_t *scan = scan_tables[direction];
1226 : Isibaar 3 int p;
1227 :     int level;
1228 :     int run;
1229 :     int last;
1230 :    
1231 :     p = 0;
1232 : edgomez 195 do {
1233 : Isibaar 3 level = get_coeff(bs, &run, &last, 0, 0);
1234 : edgomez 195 if (run == -1) {
1235 : suxen_drol 1032 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1236 : Isibaar 3 break;
1237 :     }
1238 :     p += run;
1239 : chenm001 161
1240 : edgomez 195 block[scan[p]] = level;
1241 : suxen_drol 252
1242 : edgomez 1038 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[p], level);
1243 : edgomez 1053 /* DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[p], level, BitstreamShowBits(bs, 32)); */
1244 : suxen_drol 252
1245 : suxen_drol 759 if (level < -2047 || level > 2047) {
1246 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR,"warning: inter overflow %i\n", level);
1247 : Isibaar 3 }
1248 :     p++;
1249 :     } while (!last);
1250 : edgomez 78
1251 : Isibaar 3 }
1252 : edgomez 861
1253 : chl 995
1254 : edgomez 861 /*****************************************************************************
1255 :     * VLC tables and other constant arrays
1256 :     ****************************************************************************/
1257 :    
1258 :     VLC_TABLE const coeff_tab[2][102] =
1259 :     {
1260 :     /* intra = 0 */
1261 :     {
1262 :     {{ 2, 2}, {0, 0, 1}},
1263 :     {{15, 4}, {0, 0, 2}},
1264 :     {{21, 6}, {0, 0, 3}},
1265 :     {{23, 7}, {0, 0, 4}},
1266 :     {{31, 8}, {0, 0, 5}},
1267 :     {{37, 9}, {0, 0, 6}},
1268 :     {{36, 9}, {0, 0, 7}},
1269 :     {{33, 10}, {0, 0, 8}},
1270 :     {{32, 10}, {0, 0, 9}},
1271 :     {{ 7, 11}, {0, 0, 10}},
1272 :     {{ 6, 11}, {0, 0, 11}},
1273 :     {{32, 11}, {0, 0, 12}},
1274 :     {{ 6, 3}, {0, 1, 1}},
1275 :     {{20, 6}, {0, 1, 2}},
1276 :     {{30, 8}, {0, 1, 3}},
1277 :     {{15, 10}, {0, 1, 4}},
1278 :     {{33, 11}, {0, 1, 5}},
1279 :     {{80, 12}, {0, 1, 6}},
1280 :     {{14, 4}, {0, 2, 1}},
1281 :     {{29, 8}, {0, 2, 2}},
1282 :     {{14, 10}, {0, 2, 3}},
1283 :     {{81, 12}, {0, 2, 4}},
1284 :     {{13, 5}, {0, 3, 1}},
1285 :     {{35, 9}, {0, 3, 2}},
1286 :     {{13, 10}, {0, 3, 3}},
1287 :     {{12, 5}, {0, 4, 1}},
1288 :     {{34, 9}, {0, 4, 2}},
1289 :     {{82, 12}, {0, 4, 3}},
1290 :     {{11, 5}, {0, 5, 1}},
1291 :     {{12, 10}, {0, 5, 2}},
1292 :     {{83, 12}, {0, 5, 3}},
1293 :     {{19, 6}, {0, 6, 1}},
1294 :     {{11, 10}, {0, 6, 2}},
1295 :     {{84, 12}, {0, 6, 3}},
1296 :     {{18, 6}, {0, 7, 1}},
1297 :     {{10, 10}, {0, 7, 2}},
1298 :     {{17, 6}, {0, 8, 1}},
1299 :     {{ 9, 10}, {0, 8, 2}},
1300 :     {{16, 6}, {0, 9, 1}},
1301 :     {{ 8, 10}, {0, 9, 2}},
1302 :     {{22, 7}, {0, 10, 1}},
1303 :     {{85, 12}, {0, 10, 2}},
1304 :     {{21, 7}, {0, 11, 1}},
1305 :     {{20, 7}, {0, 12, 1}},
1306 :     {{28, 8}, {0, 13, 1}},
1307 :     {{27, 8}, {0, 14, 1}},
1308 :     {{33, 9}, {0, 15, 1}},
1309 :     {{32, 9}, {0, 16, 1}},
1310 :     {{31, 9}, {0, 17, 1}},
1311 :     {{30, 9}, {0, 18, 1}},
1312 :     {{29, 9}, {0, 19, 1}},
1313 :     {{28, 9}, {0, 20, 1}},
1314 :     {{27, 9}, {0, 21, 1}},
1315 :     {{26, 9}, {0, 22, 1}},
1316 :     {{34, 11}, {0, 23, 1}},
1317 :     {{35, 11}, {0, 24, 1}},
1318 :     {{86, 12}, {0, 25, 1}},
1319 :     {{87, 12}, {0, 26, 1}},
1320 :     {{ 7, 4}, {1, 0, 1}},
1321 :     {{25, 9}, {1, 0, 2}},
1322 :     {{ 5, 11}, {1, 0, 3}},
1323 :     {{15, 6}, {1, 1, 1}},
1324 :     {{ 4, 11}, {1, 1, 2}},
1325 :     {{14, 6}, {1, 2, 1}},
1326 :     {{13, 6}, {1, 3, 1}},
1327 :     {{12, 6}, {1, 4, 1}},
1328 :     {{19, 7}, {1, 5, 1}},
1329 :     {{18, 7}, {1, 6, 1}},
1330 :     {{17, 7}, {1, 7, 1}},
1331 :     {{16, 7}, {1, 8, 1}},
1332 :     {{26, 8}, {1, 9, 1}},
1333 :     {{25, 8}, {1, 10, 1}},
1334 :     {{24, 8}, {1, 11, 1}},
1335 :     {{23, 8}, {1, 12, 1}},
1336 :     {{22, 8}, {1, 13, 1}},
1337 :     {{21, 8}, {1, 14, 1}},
1338 :     {{20, 8}, {1, 15, 1}},
1339 :     {{19, 8}, {1, 16, 1}},
1340 :     {{24, 9}, {1, 17, 1}},
1341 :     {{23, 9}, {1, 18, 1}},
1342 :     {{22, 9}, {1, 19, 1}},
1343 :     {{21, 9}, {1, 20, 1}},
1344 :     {{20, 9}, {1, 21, 1}},
1345 :     {{19, 9}, {1, 22, 1}},
1346 :     {{18, 9}, {1, 23, 1}},
1347 :     {{17, 9}, {1, 24, 1}},
1348 :     {{ 7, 10}, {1, 25, 1}},
1349 :     {{ 6, 10}, {1, 26, 1}},
1350 :     {{ 5, 10}, {1, 27, 1}},
1351 :     {{ 4, 10}, {1, 28, 1}},
1352 :     {{36, 11}, {1, 29, 1}},
1353 :     {{37, 11}, {1, 30, 1}},
1354 :     {{38, 11}, {1, 31, 1}},
1355 :     {{39, 11}, {1, 32, 1}},
1356 :     {{88, 12}, {1, 33, 1}},
1357 :     {{89, 12}, {1, 34, 1}},
1358 :     {{90, 12}, {1, 35, 1}},
1359 :     {{91, 12}, {1, 36, 1}},
1360 :     {{92, 12}, {1, 37, 1}},
1361 :     {{93, 12}, {1, 38, 1}},
1362 :     {{94, 12}, {1, 39, 1}},
1363 :     {{95, 12}, {1, 40, 1}}
1364 :     },
1365 :     /* intra = 1 */
1366 :     {
1367 :     {{ 2, 2}, {0, 0, 1}},
1368 :     {{15, 4}, {0, 0, 3}},
1369 :     {{21, 6}, {0, 0, 6}},
1370 :     {{23, 7}, {0, 0, 9}},
1371 :     {{31, 8}, {0, 0, 10}},
1372 :     {{37, 9}, {0, 0, 13}},
1373 :     {{36, 9}, {0, 0, 14}},
1374 :     {{33, 10}, {0, 0, 17}},
1375 :     {{32, 10}, {0, 0, 18}},
1376 :     {{ 7, 11}, {0, 0, 21}},
1377 :     {{ 6, 11}, {0, 0, 22}},
1378 :     {{32, 11}, {0, 0, 23}},
1379 :     {{ 6, 3}, {0, 0, 2}},
1380 :     {{20, 6}, {0, 1, 2}},
1381 :     {{30, 8}, {0, 0, 11}},
1382 :     {{15, 10}, {0, 0, 19}},
1383 :     {{33, 11}, {0, 0, 24}},
1384 :     {{80, 12}, {0, 0, 25}},
1385 :     {{14, 4}, {0, 1, 1}},
1386 :     {{29, 8}, {0, 0, 12}},
1387 :     {{14, 10}, {0, 0, 20}},
1388 :     {{81, 12}, {0, 0, 26}},
1389 :     {{13, 5}, {0, 0, 4}},
1390 :     {{35, 9}, {0, 0, 15}},
1391 :     {{13, 10}, {0, 1, 7}},
1392 :     {{12, 5}, {0, 0, 5}},
1393 :     {{34, 9}, {0, 4, 2}},
1394 :     {{82, 12}, {0, 0, 27}},
1395 :     {{11, 5}, {0, 2, 1}},
1396 :     {{12, 10}, {0, 2, 4}},
1397 :     {{83, 12}, {0, 1, 9}},
1398 :     {{19, 6}, {0, 0, 7}},
1399 :     {{11, 10}, {0, 3, 4}},
1400 :     {{84, 12}, {0, 6, 3}},
1401 :     {{18, 6}, {0, 0, 8}},
1402 :     {{10, 10}, {0, 4, 3}},
1403 :     {{17, 6}, {0, 3, 1}},
1404 :     {{ 9, 10}, {0, 8, 2}},
1405 :     {{16, 6}, {0, 4, 1}},
1406 :     {{ 8, 10}, {0, 5, 3}},
1407 :     {{22, 7}, {0, 1, 3}},
1408 :     {{85, 12}, {0, 1, 10}},
1409 :     {{21, 7}, {0, 2, 2}},
1410 :     {{20, 7}, {0, 7, 1}},
1411 :     {{28, 8}, {0, 1, 4}},
1412 :     {{27, 8}, {0, 3, 2}},
1413 :     {{33, 9}, {0, 0, 16}},
1414 :     {{32, 9}, {0, 1, 5}},
1415 :     {{31, 9}, {0, 1, 6}},
1416 :     {{30, 9}, {0, 2, 3}},
1417 :     {{29, 9}, {0, 3, 3}},
1418 :     {{28, 9}, {0, 5, 2}},
1419 :     {{27, 9}, {0, 6, 2}},
1420 :     {{26, 9}, {0, 7, 2}},
1421 :     {{34, 11}, {0, 1, 8}},
1422 :     {{35, 11}, {0, 9, 2}},
1423 :     {{86, 12}, {0, 2, 5}},
1424 :     {{87, 12}, {0, 7, 3}},
1425 :     {{ 7, 4}, {1, 0, 1}},
1426 :     {{25, 9}, {0, 11, 1}},
1427 :     {{ 5, 11}, {1, 0, 6}},
1428 :     {{15, 6}, {1, 1, 1}},
1429 :     {{ 4, 11}, {1, 0, 7}},
1430 :     {{14, 6}, {1, 2, 1}},
1431 :     {{13, 6}, {0, 5, 1}},
1432 :     {{12, 6}, {1, 0, 2}},
1433 :     {{19, 7}, {1, 5, 1}},
1434 :     {{18, 7}, {0, 6, 1}},
1435 :     {{17, 7}, {1, 3, 1}},
1436 :     {{16, 7}, {1, 4, 1}},
1437 :     {{26, 8}, {1, 9, 1}},
1438 :     {{25, 8}, {0, 8, 1}},
1439 :     {{24, 8}, {0, 9, 1}},
1440 :     {{23, 8}, {0, 10, 1}},
1441 :     {{22, 8}, {1, 0, 3}},
1442 :     {{21, 8}, {1, 6, 1}},
1443 :     {{20, 8}, {1, 7, 1}},
1444 :     {{19, 8}, {1, 8, 1}},
1445 :     {{24, 9}, {0, 12, 1}},
1446 :     {{23, 9}, {1, 0, 4}},
1447 :     {{22, 9}, {1, 1, 2}},
1448 :     {{21, 9}, {1, 10, 1}},
1449 :     {{20, 9}, {1, 11, 1}},
1450 :     {{19, 9}, {1, 12, 1}},
1451 :     {{18, 9}, {1, 13, 1}},
1452 :     {{17, 9}, {1, 14, 1}},
1453 :     {{ 7, 10}, {0, 13, 1}},
1454 :     {{ 6, 10}, {1, 0, 5}},
1455 :     {{ 5, 10}, {1, 1, 3}},
1456 :     {{ 4, 10}, {1, 2, 2}},
1457 :     {{36, 11}, {1, 3, 2}},
1458 :     {{37, 11}, {1, 4, 2}},
1459 :     {{38, 11}, {1, 15, 1}},
1460 :     {{39, 11}, {1, 16, 1}},
1461 :     {{88, 12}, {0, 14, 1}},
1462 :     {{89, 12}, {1, 0, 8}},
1463 :     {{90, 12}, {1, 5, 2}},
1464 :     {{91, 12}, {1, 6, 2}},
1465 :     {{92, 12}, {1, 17, 1}},
1466 :     {{93, 12}, {1, 18, 1}},
1467 :     {{94, 12}, {1, 19, 1}},
1468 :     {{95, 12}, {1, 20, 1}}
1469 :     }
1470 :     };
1471 :    
1472 :     /* constants taken from momusys/vm_common/inlcude/max_level.h */
1473 :     uint8_t const max_level[2][2][64] = {
1474 :     {
1475 :     /* intra = 0, last = 0 */
1476 :     {
1477 :     12, 6, 4, 3, 3, 3, 3, 2,
1478 :     2, 2, 2, 1, 1, 1, 1, 1,
1479 :     1, 1, 1, 1, 1, 1, 1, 1,
1480 :     1, 1, 1, 0, 0, 0, 0, 0,
1481 :     0, 0, 0, 0, 0, 0, 0, 0,
1482 :     0, 0, 0, 0, 0, 0, 0, 0,
1483 :     0, 0, 0, 0, 0, 0, 0, 0,
1484 :     0, 0, 0, 0, 0, 0, 0, 0
1485 :     },
1486 :     /* intra = 0, last = 1 */
1487 :     {
1488 :     3, 2, 1, 1, 1, 1, 1, 1,
1489 :     1, 1, 1, 1, 1, 1, 1, 1,
1490 :     1, 1, 1, 1, 1, 1, 1, 1,
1491 :     1, 1, 1, 1, 1, 1, 1, 1,
1492 :     1, 1, 1, 1, 1, 1, 1, 1,
1493 :     1, 0, 0, 0, 0, 0, 0, 0,
1494 :     0, 0, 0, 0, 0, 0, 0, 0,
1495 :     0, 0, 0, 0, 0, 0, 0, 0
1496 :     }
1497 :     },
1498 :     {
1499 :     /* intra = 1, last = 0 */
1500 :     {
1501 :     27, 10, 5, 4, 3, 3, 3, 3,
1502 :     2, 2, 1, 1, 1, 1, 1, 0,
1503 :     0, 0, 0, 0, 0, 0, 0, 0,
1504 :     0, 0, 0, 0, 0, 0, 0, 0,
1505 :     0, 0, 0, 0, 0, 0, 0, 0,
1506 :     0, 0, 0, 0, 0, 0, 0, 0,
1507 :     0, 0, 0, 0, 0, 0, 0, 0,
1508 :     0, 0, 0, 0, 0, 0, 0, 0
1509 :     },
1510 :     /* intra = 1, last = 1 */
1511 :     {
1512 :     8, 3, 2, 2, 2, 2, 2, 1,
1513 :     1, 1, 1, 1, 1, 1, 1, 1,
1514 :     1, 1, 1, 1, 1, 0, 0, 0,
1515 :     0, 0, 0, 0, 0, 0, 0, 0,
1516 :     0, 0, 0, 0, 0, 0, 0, 0,
1517 :     0, 0, 0, 0, 0, 0, 0, 0,
1518 :     0, 0, 0, 0, 0, 0, 0, 0,
1519 :     0, 0, 0, 0, 0, 0, 0, 0
1520 :     }
1521 :     }
1522 :     };
1523 :    
1524 :     uint8_t const max_run[2][2][64] = {
1525 :     {
1526 :     /* intra = 0, last = 0 */
1527 :     {
1528 :     0, 26, 10, 6, 2, 1, 1, 0,
1529 :     0, 0, 0, 0, 0, 0, 0, 0,
1530 :     0, 0, 0, 0, 0, 0, 0, 0,
1531 :     0, 0, 0, 0, 0, 0, 0, 0,
1532 :     0, 0, 0, 0, 0, 0, 0, 0,
1533 :     0, 0, 0, 0, 0, 0, 0, 0,
1534 :     0, 0, 0, 0, 0, 0, 0, 0,
1535 :     0, 0, 0, 0, 0, 0, 0, 0,
1536 :     },
1537 :     /* intra = 0, last = 1 */
1538 : edgomez 1161 {
1539 : edgomez 861 0, 40, 1, 0, 0, 0, 0, 0,
1540 :     0, 0, 0, 0, 0, 0, 0, 0,
1541 :     0, 0, 0, 0, 0, 0, 0, 0,
1542 :     0, 0, 0, 0, 0, 0, 0, 0,
1543 :     0, 0, 0, 0, 0, 0, 0, 0,
1544 :     0, 0, 0, 0, 0, 0, 0, 0,
1545 :     0, 0, 0, 0, 0, 0, 0, 0,
1546 :     0, 0, 0, 0, 0, 0, 0, 0,
1547 :     }
1548 :     },
1549 :     {
1550 :     /* intra = 1, last = 0 */
1551 :     {
1552 :     0, 14, 9, 7, 3, 2, 1, 1,
1553 :     1, 1, 1, 0, 0, 0, 0, 0,
1554 :     0, 0, 0, 0, 0, 0, 0, 0,
1555 :     0, 0, 0, 0, 0, 0, 0, 0,
1556 :     0, 0, 0, 0, 0, 0, 0, 0,
1557 :     0, 0, 0, 0, 0, 0, 0, 0,
1558 :     0, 0, 0, 0, 0, 0, 0, 0,
1559 :     0, 0, 0, 0, 0, 0, 0, 0,
1560 :     },
1561 :     /* intra = 1, last = 1 */
1562 :     {
1563 :     0, 20, 6, 1, 0, 0, 0, 0,
1564 :     0, 0, 0, 0, 0, 0, 0, 0,
1565 :     0, 0, 0, 0, 0, 0, 0, 0,
1566 :     0, 0, 0, 0, 0, 0, 0, 0,
1567 :     0, 0, 0, 0, 0, 0, 0, 0,
1568 :     0, 0, 0, 0, 0, 0, 0, 0,
1569 :     0, 0, 0, 0, 0, 0, 0, 0,
1570 :     0, 0, 0, 0, 0, 0, 0, 0,
1571 :     }
1572 :     }
1573 :     };
1574 :    
1575 :     /******************************************************************
1576 :     * encoder tables *
1577 :     ******************************************************************/
1578 :    
1579 :     VLC sprite_trajectory_code[32768];
1580 :    
1581 :     VLC sprite_trajectory_len[15] = {
1582 : edgomez 1161 { 0x00 , 2},
1583 :     { 0x02 , 3}, { 0x03, 3}, { 0x04, 3}, { 0x05, 3}, { 0x06, 3},
1584 : chl 1113 { 0x0E , 4}, { 0x1E, 5}, { 0x3E, 6}, { 0x7E, 7}, { 0xFE, 8},
1585 : edgomez 861 { 0x1FE, 9}, {0x3FE,10}, {0x7FE,11}, {0xFFE,12} };
1586 :    
1587 :    
1588 :     /* DCT coefficients. Four tables, two for last = 0, two for last = 1.
1589 :     the sign bit must be added afterwards. */
1590 :    
1591 :     /* MCBPC Indexing by cbpc in first two bits, mode in last two.
1592 :     CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10.
1593 :     Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */
1594 :    
1595 :     VLC mcbpc_intra_tab[15] = {
1596 :     {0x01, 9}, {0x01, 1}, {0x01, 4}, {0x00, 0},
1597 :     {0x00, 0}, {0x01, 3}, {0x01, 6}, {0x00, 0},
1598 :     {0x00, 0}, {0x02, 3}, {0x02, 6}, {0x00, 0},
1599 :     {0x00, 0}, {0x03, 3}, {0x03, 6}
1600 :     };
1601 :    
1602 :     /* MCBPC inter.
1603 :     Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */
1604 :    
1605 :     VLC mcbpc_inter_tab[29] = {
1606 :     {1, 1}, {3, 3}, {2, 3}, {3, 5}, {4, 6}, {1, 9}, {0, 0}, {0, 0},
1607 :     {3, 4}, {7, 7}, {5, 7}, {4, 8}, {4, 9}, {0, 0}, {0, 0}, {0, 0},
1608 :     {2, 4}, {6, 7}, {4, 7}, {3, 8}, {3, 9}, {0, 0}, {0, 0}, {0, 0},
1609 :     {5, 6}, {5, 9}, {5, 8}, {3, 7}, {2, 9}
1610 :     };
1611 :    
1612 : edgomez 958 const VLC xvid_cbpy_tab[16] = {
1613 : edgomez 861 {3, 4}, {5, 5}, {4, 5}, {9, 4}, {3, 5}, {7, 4}, {2, 6}, {11, 4},
1614 :     {2, 5}, {3, 6}, {5, 4}, {10, 4}, {4, 4}, {8, 4}, {6, 4}, {3, 2}
1615 :     };
1616 :    
1617 :     const VLC dcy_tab[511] = {
1618 :     {0x100, 15}, {0x101, 15}, {0x102, 15}, {0x103, 15},
1619 :     {0x104, 15}, {0x105, 15}, {0x106, 15}, {0x107, 15},
1620 :     {0x108, 15}, {0x109, 15}, {0x10a, 15}, {0x10b, 15},
1621 :     {0x10c, 15}, {0x10d, 15}, {0x10e, 15}, {0x10f, 15},
1622 :     {0x110, 15}, {0x111, 15}, {0x112, 15}, {0x113, 15},
1623 :     {0x114, 15}, {0x115, 15}, {0x116, 15}, {0x117, 15},
1624 :     {0x118, 15}, {0x119, 15}, {0x11a, 15}, {0x11b, 15},
1625 :     {0x11c, 15}, {0x11d, 15}, {0x11e, 15}, {0x11f, 15},
1626 :     {0x120, 15}, {0x121, 15}, {0x122, 15}, {0x123, 15},
1627 :     {0x124, 15}, {0x125, 15}, {0x126, 15}, {0x127, 15},
1628 :     {0x128, 15}, {0x129, 15}, {0x12a, 15}, {0x12b, 15},
1629 :     {0x12c, 15}, {0x12d, 15}, {0x12e, 15}, {0x12f, 15},
1630 :     {0x130, 15}, {0x131, 15}, {0x132, 15}, {0x133, 15},
1631 :     {0x134, 15}, {0x135, 15}, {0x136, 15}, {0x137, 15},
1632 :     {0x138, 15}, {0x139, 15}, {0x13a, 15}, {0x13b, 15},
1633 :     {0x13c, 15}, {0x13d, 15}, {0x13e, 15}, {0x13f, 15},
1634 :     {0x140, 15}, {0x141, 15}, {0x142, 15}, {0x143, 15},
1635 :     {0x144, 15}, {0x145, 15}, {0x146, 15}, {0x147, 15},
1636 :     {0x148, 15}, {0x149, 15}, {0x14a, 15}, {0x14b, 15},
1637 :     {0x14c, 15}, {0x14d, 15}, {0x14e, 15}, {0x14f, 15},
1638 :     {0x150, 15}, {0x151, 15}, {0x152, 15}, {0x153, 15},
1639 :     {0x154, 15}, {0x155, 15}, {0x156, 15}, {0x157, 15},
1640 :     {0x158, 15}, {0x159, 15}, {0x15a, 15}, {0x15b, 15},
1641 :     {0x15c, 15}, {0x15d, 15}, {0x15e, 15}, {0x15f, 15},
1642 :     {0x160, 15}, {0x161, 15}, {0x162, 15}, {0x163, 15},
1643 :     {0x164, 15}, {0x165, 15}, {0x166, 15}, {0x167, 15},
1644 :     {0x168, 15}, {0x169, 15}, {0x16a, 15}, {0x16b, 15},
1645 :     {0x16c, 15}, {0x16d, 15}, {0x16e, 15}, {0x16f, 15},
1646 :     {0x170, 15}, {0x171, 15}, {0x172, 15}, {0x173, 15},
1647 :     {0x174, 15}, {0x175, 15}, {0x176, 15}, {0x177, 15},
1648 :     {0x178, 15}, {0x179, 15}, {0x17a, 15}, {0x17b, 15},
1649 :     {0x17c, 15}, {0x17d, 15}, {0x17e, 15}, {0x17f, 15},
1650 :     {0x80, 13}, {0x81, 13}, {0x82, 13}, {0x83, 13},
1651 :     {0x84, 13}, {0x85, 13}, {0x86, 13}, {0x87, 13},
1652 :     {0x88, 13}, {0x89, 13}, {0x8a, 13}, {0x8b, 13},
1653 :     {0x8c, 13}, {0x8d, 13}, {0x8e, 13}, {0x8f, 13},
1654 :     {0x90, 13}, {0x91, 13}, {0x92, 13}, {0x93, 13},
1655 :     {0x94, 13}, {0x95, 13}, {0x96, 13}, {0x97, 13},
1656 :     {0x98, 13}, {0x99, 13}, {0x9a, 13}, {0x9b, 13},
1657 :     {0x9c, 13}, {0x9d, 13}, {0x9e, 13}, {0x9f, 13},
1658 :     {0xa0, 13}, {0xa1, 13}, {0xa2, 13}, {0xa3, 13},
1659 :     {0xa4, 13}, {0xa5, 13}, {0xa6, 13}, {0xa7, 13},
1660 :     {0xa8, 13}, {0xa9, 13}, {0xaa, 13}, {0xab, 13},
1661 :     {0xac, 13}, {0xad, 13}, {0xae, 13}, {0xaf, 13},
1662 :     {0xb0, 13}, {0xb1, 13}, {0xb2, 13}, {0xb3, 13},
1663 :     {0xb4, 13}, {0xb5, 13}, {0xb6, 13}, {0xb7, 13},
1664 :     {0xb8, 13}, {0xb9, 13}, {0xba, 13}, {0xbb, 13},
1665 :     {0xbc, 13}, {0xbd, 13}, {0xbe, 13}, {0xbf, 13},
1666 :     {0x40, 11}, {0x41, 11}, {0x42, 11}, {0x43, 11},
1667 :     {0x44, 11}, {0x45, 11}, {0x46, 11}, {0x47, 11},
1668 :     {0x48, 11}, {0x49, 11}, {0x4a, 11}, {0x4b, 11},
1669 :     {0x4c, 11}, {0x4d, 11}, {0x4e, 11}, {0x4f, 11},
1670 :     {0x50, 11}, {0x51, 11}, {0x52, 11}, {0x53, 11},
1671 :     {0x54, 11}, {0x55, 11}, {0x56, 11}, {0x57, 11},
1672 :     {0x58, 11}, {0x59, 11}, {0x5a, 11}, {0x5b, 11},
1673 :     {0x5c, 11}, {0x5d, 11}, {0x5e, 11}, {0x5f, 11},
1674 :     {0x20, 9}, {0x21, 9}, {0x22, 9}, {0x23, 9},
1675 :     {0x24, 9}, {0x25, 9}, {0x26, 9}, {0x27, 9},
1676 :     {0x28, 9}, {0x29, 9}, {0x2a, 9}, {0x2b, 9},
1677 :     {0x2c, 9}, {0x2d, 9}, {0x2e, 9}, {0x2f, 9},
1678 :     {0x10, 7}, {0x11, 7}, {0x12, 7}, {0x13, 7},
1679 :     {0x14, 7}, {0x15, 7}, {0x16, 7}, {0x17, 7},
1680 :     {0x10, 6}, {0x11, 6}, {0x12, 6}, {0x13, 6},
1681 :     {0x08, 4}, {0x09, 4}, {0x06, 3}, {0x03, 3},
1682 :     {0x07, 3}, {0x0a, 4}, {0x0b, 4}, {0x14, 6},
1683 :     {0x15, 6}, {0x16, 6}, {0x17, 6}, {0x18, 7},
1684 :     {0x19, 7}, {0x1a, 7}, {0x1b, 7}, {0x1c, 7},
1685 :     {0x1d, 7}, {0x1e, 7}, {0x1f, 7}, {0x30, 9},
1686 :     {0x31, 9}, {0x32, 9}, {0x33, 9}, {0x34, 9},
1687 :     {0x35, 9}, {0x36, 9}, {0x37, 9}, {0x38, 9},
1688 :     {0x39, 9}, {0x3a, 9}, {0x3b, 9}, {0x3c, 9},
1689 :     {0x3d, 9}, {0x3e, 9}, {0x3f, 9}, {0x60, 11},
1690 :     {0x61, 11}, {0x62, 11}, {0x63, 11}, {0x64, 11},
1691 :     {0x65, 11}, {0x66, 11}, {0x67, 11}, {0x68, 11},
1692 :     {0x69, 11}, {0x6a, 11}, {0x6b, 11}, {0x6c, 11},
1693 :     {0x6d, 11}, {0x6e, 11}, {0x6f, 11}, {0x70, 11},
1694 :     {0x71, 11}, {0x72, 11}, {0x73, 11}, {0x74, 11},
1695 :     {0x75, 11}, {0x76, 11}, {0x77, 11}, {0x78, 11},
1696 :     {0x79, 11}, {0x7a, 11}, {0x7b, 11}, {0x7c, 11},
1697 :     {0x7d, 11}, {0x7e, 11}, {0x7f, 11}, {0xc0, 13},
1698 :     {0xc1, 13}, {0xc2, 13}, {0xc3, 13}, {0xc4, 13},
1699 :     {0xc5, 13}, {0xc6, 13}, {0xc7, 13}, {0xc8, 13},
1700 :     {0xc9, 13}, {0xca, 13}, {0xcb, 13}, {0xcc, 13},
1701 :     {0xcd, 13}, {0xce, 13}, {0xcf, 13}, {0xd0, 13},
1702 :     {0xd1, 13}, {0xd2, 13}, {0xd3, 13}, {0xd4, 13},
1703 :     {0xd5, 13}, {0xd6, 13}, {0xd7, 13}, {0xd8, 13},
1704 :     {0xd9, 13}, {0xda, 13}, {0xdb, 13}, {0xdc, 13},
1705 :     {0xdd, 13}, {0xde, 13}, {0xdf, 13}, {0xe0, 13},
1706 :     {0xe1, 13}, {0xe2, 13}, {0xe3, 13}, {0xe4, 13},
1707 :     {0xe5, 13}, {0xe6, 13}, {0xe7, 13}, {0xe8, 13},
1708 :     {0xe9, 13}, {0xea, 13}, {0xeb, 13}, {0xec, 13},
1709 :     {0xed, 13}, {0xee, 13}, {0xef, 13}, {0xf0, 13},
1710 :     {0xf1, 13}, {0xf2, 13}, {0xf3, 13}, {0xf4, 13},
1711 :     {0xf5, 13}, {0xf6, 13}, {0xf7, 13}, {0xf8, 13},
1712 :     {0xf9, 13}, {0xfa, 13}, {0xfb, 13}, {0xfc, 13},
1713 :     {0xfd, 13}, {0xfe, 13}, {0xff, 13}, {0x180, 15},
1714 :     {0x181, 15}, {0x182, 15}, {0x183, 15}, {0x184, 15},
1715 :     {0x185, 15}, {0x186, 15}, {0x187, 15}, {0x188, 15},
1716 :     {0x189, 15}, {0x18a, 15}, {0x18b, 15}, {0x18c, 15},
1717 :     {0x18d, 15}, {0x18e, 15}, {0x18f, 15}, {0x190, 15},
1718 :     {0x191, 15}, {0x192, 15}, {0x193, 15}, {0x194, 15},
1719 :     {0x195, 15}, {0x196, 15}, {0x197, 15}, {0x198, 15},
1720 :     {0x199, 15}, {0x19a, 15}, {0x19b, 15}, {0x19c, 15},
1721 :     {0x19d, 15}, {0x19e, 15}, {0x19f, 15}, {0x1a0, 15},
1722 :     {0x1a1, 15}, {0x1a2, 15}, {0x1a3, 15}, {0x1a4, 15},
1723 :     {0x1a5, 15}, {0x1a6, 15}, {0x1a7, 15}, {0x1a8, 15},
1724 :     {0x1a9, 15}, {0x1aa, 15}, {0x1ab, 15}, {0x1ac, 15},
1725 :     {0x1ad, 15}, {0x1ae, 15}, {0x1af, 15}, {0x1b0, 15},
1726 :     {0x1b1, 15}, {0x1b2, 15}, {0x1b3, 15}, {0x1b4, 15},
1727 :     {0x1b5, 15}, {0x1b6, 15}, {0x1b7, 15}, {0x1b8, 15},
1728 :     {0x1b9, 15}, {0x1ba, 15}, {0x1bb, 15}, {0x1bc, 15},
1729 :     {0x1bd, 15}, {0x1be, 15}, {0x1bf, 15}, {0x1c0, 15},
1730 :     {0x1c1, 15}, {0x1c2, 15}, {0x1c3, 15}, {0x1c4, 15},
1731 :     {0x1c5, 15}, {0x1c6, 15}, {0x1c7, 15}, {0x1c8, 15},
1732 :     {0x1c9, 15}, {0x1ca, 15}, {0x1cb, 15}, {0x1cc, 15},
1733 :     {0x1cd, 15}, {0x1ce, 15}, {0x1cf, 15}, {0x1d0, 15},
1734 :     {0x1d1, 15}, {0x1d2, 15}, {0x1d3, 15}, {0x1d4, 15},
1735 :     {0x1d5, 15}, {0x1d6, 15}, {0x1d7, 15}, {0x1d8, 15},
1736 :     {0x1d9, 15}, {0x1da, 15}, {0x1db, 15}, {0x1dc, 15},
1737 :     {0x1dd, 15}, {0x1de, 15}, {0x1df, 15}, {0x1e0, 15},
1738 :     {0x1e1, 15}, {0x1e2, 15}, {0x1e3, 15}, {0x1e4, 15},
1739 :     {0x1e5, 15}, {0x1e6, 15}, {0x1e7, 15}, {0x1e8, 15},
1740 :     {0x1e9, 15}, {0x1ea, 15}, {0x1eb, 15}, {0x1ec, 15},
1741 :     {0x1ed, 15}, {0x1ee, 15}, {0x1ef, 15}, {0x1f0, 15},
1742 :     {0x1f1, 15}, {0x1f2, 15}, {0x1f3, 15}, {0x1f4, 15},
1743 :     {0x1f5, 15}, {0x1f6, 15}, {0x1f7, 15}, {0x1f8, 15},
1744 :     {0x1f9, 15}, {0x1fa, 15}, {0x1fb, 15}, {0x1fc, 15},
1745 :     {0x1fd, 15}, {0x1fe, 15}, {0x1ff, 15},
1746 :     };
1747 :    
1748 :     const VLC dcc_tab[511] = {
1749 :     {0x100, 16}, {0x101, 16}, {0x102, 16}, {0x103, 16},
1750 :     {0x104, 16}, {0x105, 16}, {0x106, 16}, {0x107, 16},
1751 :     {0x108, 16}, {0x109, 16}, {0x10a, 16}, {0x10b, 16},
1752 :     {0x10c, 16}, {0x10d, 16}, {0x10e, 16}, {0x10f, 16},
1753 :     {0x110, 16}, {0x111, 16}, {0x112, 16}, {0x113, 16},
1754 :     {0x114, 16}, {0x115, 16}, {0x116, 16}, {0x117, 16},
1755 :     {0x118, 16}, {0x119, 16}, {0x11a, 16}, {0x11b, 16},
1756 :     {0x11c, 16}, {0x11d, 16}, {0x11e, 16}, {0x11f, 16},
1757 :     {0x120, 16}, {0x121, 16}, {0x122, 16}, {0x123, 16},
1758 :     {0x124, 16}, {0x125, 16}, {0x126, 16}, {0x127, 16},
1759 :     {0x128, 16}, {0x129, 16}, {0x12a, 16}, {0x12b, 16},
1760 :     {0x12c, 16}, {0x12d, 16}, {0x12e, 16}, {0x12f, 16},
1761 :     {0x130, 16}, {0x131, 16}, {0x132, 16}, {0x133, 16},
1762 :     {0x134, 16}, {0x135, 16}, {0x136, 16}, {0x137, 16},
1763 :     {0x138, 16}, {0x139, 16}, {0x13a, 16}, {0x13b, 16},
1764 :     {0x13c, 16}, {0x13d, 16}, {0x13e, 16}, {0x13f, 16},
1765 :     {0x140, 16}, {0x141, 16}, {0x142, 16}, {0x143, 16},
1766 :     {0x144, 16}, {0x145, 16}, {0x146, 16}, {0x147, 16},
1767 :     {0x148, 16}, {0x149, 16}, {0x14a, 16}, {0x14b, 16},
1768 :     {0x14c, 16}, {0x14d, 16}, {0x14e, 16}, {0x14f, 16},
1769 :     {0x150, 16}, {0x151, 16}, {0x152, 16}, {0x153, 16},
1770 :     {0x154, 16}, {0x155, 16}, {0x156, 16}, {0x157, 16},
1771 :     {0x158, 16}, {0x159, 16}, {0x15a, 16}, {0x15b, 16},
1772 :     {0x15c, 16}, {0x15d, 16}, {0x15e, 16}, {0x15f, 16},
1773 :     {0x160, 16}, {0x161, 16}, {0x162, 16}, {0x163, 16},
1774 :     {0x164, 16}, {0x165, 16}, {0x166, 16}, {0x167, 16},
1775 :     {0x168, 16}, {0x169, 16}, {0x16a, 16}, {0x16b, 16},
1776 :     {0x16c, 16}, {0x16d, 16}, {0x16e, 16}, {0x16f, 16},
1777 :     {0x170, 16}, {0x171, 16}, {0x172, 16}, {0x173, 16},
1778 :     {0x174, 16}, {0x175, 16}, {0x176, 16}, {0x177, 16},
1779 :     {0x178, 16}, {0x179, 16}, {0x17a, 16}, {0x17b, 16},
1780 :     {0x17c, 16}, {0x17d, 16}, {0x17e, 16}, {0x17f, 16},
1781 :     {0x80, 14}, {0x81, 14}, {0x82, 14}, {0x83, 14},
1782 :     {0x84, 14}, {0x85, 14}, {0x86, 14}, {0x87, 14},
1783 :     {0x88, 14}, {0x89, 14}, {0x8a, 14}, {0x8b, 14},
1784 :     {0x8c, 14}, {0x8d, 14}, {0x8e, 14}, {0x8f, 14},
1785 :     {0x90, 14}, {0x91, 14}, {0x92, 14}, {0x93, 14},
1786 :     {0x94, 14}, {0x95, 14}, {0x96, 14}, {0x97, 14},
1787 :     {0x98, 14}, {0x99, 14}, {0x9a, 14}, {0x9b, 14},
1788 :     {0x9c, 14}, {0x9d, 14}, {0x9e, 14}, {0x9f, 14},
1789 :     {0xa0, 14}, {0xa1, 14}, {0xa2, 14}, {0xa3, 14},
1790 :     {0xa4, 14}, {0xa5, 14}, {0xa6, 14}, {0xa7, 14},
1791 :     {0xa8, 14}, {0xa9, 14}, {0xaa, 14}, {0xab, 14},
1792 :     {0xac, 14}, {0xad, 14}, {0xae, 14}, {0xaf, 14},
1793 :     {0xb0, 14}, {0xb1, 14}, {0xb2, 14}, {0xb3, 14},
1794 :     {0xb4, 14}, {0xb5, 14}, {0xb6, 14}, {0xb7, 14},
1795 :     {0xb8, 14}, {0xb9, 14}, {0xba, 14}, {0xbb, 14},
1796 :     {0xbc, 14}, {0xbd, 14}, {0xbe, 14}, {0xbf, 14},
1797 :     {0x40, 12}, {0x41, 12}, {0x42, 12}, {0x43, 12},
1798 :     {0x44, 12}, {0x45, 12}, {0x46, 12}, {0x47, 12},
1799 :     {0x48, 12}, {0x49, 12}, {0x4a, 12}, {0x4b, 12},
1800 :     {0x4c, 12}, {0x4d, 12}, {0x4e, 12}, {0x4f, 12},
1801 :     {0x50, 12}, {0x51, 12}, {0x52, 12}, {0x53, 12},
1802 :     {0x54, 12}, {0x55, 12}, {0x56, 12}, {0x57, 12},
1803 :     {0x58, 12}, {0x59, 12}, {0x5a, 12}, {0x5b, 12},
1804 :     {0x5c, 12}, {0x5d, 12}, {0x5e, 12}, {0x5f, 12},
1805 :     {0x20, 10}, {0x21, 10}, {0x22, 10}, {0x23, 10},
1806 :     {0x24, 10}, {0x25, 10}, {0x26, 10}, {0x27, 10},
1807 :     {0x28, 10}, {0x29, 10}, {0x2a, 10}, {0x2b, 10},
1808 :     {0x2c, 10}, {0x2d, 10}, {0x2e, 10}, {0x2f, 10},
1809 :     {0x10, 8}, {0x11, 8}, {0x12, 8}, {0x13, 8},
1810 :     {0x14, 8}, {0x15, 8}, {0x16, 8}, {0x17, 8},
1811 :     {0x08, 6}, {0x09, 6}, {0x0a, 6}, {0x0b, 6},
1812 :     {0x04, 4}, {0x05, 4}, {0x04, 3}, {0x03, 2},
1813 :     {0x05, 3}, {0x06, 4}, {0x07, 4}, {0x0c, 6},
1814 :     {0x0d, 6}, {0x0e, 6}, {0x0f, 6}, {0x18, 8},
1815 :     {0x19, 8}, {0x1a, 8}, {0x1b, 8}, {0x1c, 8},
1816 :     {0x1d, 8}, {0x1e, 8}, {0x1f, 8}, {0x30, 10},
1817 :     {0x31, 10}, {0x32, 10}, {0x33, 10}, {0x34, 10},
1818 :     {0x35, 10}, {0x36, 10}, {0x37, 10}, {0x38, 10},
1819 :     {0x39, 10}, {0x3a, 10}, {0x3b, 10}, {0x3c, 10},
1820 :     {0x3d, 10}, {0x3e, 10}, {0x3f, 10}, {0x60, 12},
1821 :     {0x61, 12}, {0x62, 12}, {0x63, 12}, {0x64, 12},
1822 :     {0x65, 12}, {0x66, 12}, {0x67, 12}, {0x68, 12},
1823 :     {0x69, 12}, {0x6a, 12}, {0x6b, 12}, {0x6c, 12},
1824 :     {0x6d, 12}, {0x6e, 12}, {0x6f, 12}, {0x70, 12},
1825 :     {0x71, 12}, {0x72, 12}, {0x73, 12}, {0x74, 12},
1826 :     {0x75, 12}, {0x76, 12}, {0x77, 12}, {0x78, 12},
1827 :     {0x79, 12}, {0x7a, 12}, {0x7b, 12}, {0x7c, 12},
1828 :     {0x7d, 12}, {0x7e, 12}, {0x7f, 12}, {0xc0, 14},
1829 :     {0xc1, 14}, {0xc2, 14}, {0xc3, 14}, {0xc4, 14},
1830 :     {0xc5, 14}, {0xc6, 14}, {0xc7, 14}, {0xc8, 14},
1831 :     {0xc9, 14}, {0xca, 14}, {0xcb, 14}, {0xcc, 14},
1832 :     {0xcd, 14}, {0xce, 14}, {0xcf, 14}, {0xd0, 14},
1833 :     {0xd1, 14}, {0xd2, 14}, {0xd3, 14}, {0xd4, 14},
1834 :     {0xd5, 14}, {0xd6, 14}, {0xd7, 14}, {0xd8, 14},
1835 :     {0xd9, 14}, {0xda, 14}, {0xdb, 14}, {0xdc, 14},
1836 :     {0xdd, 14}, {0xde, 14}, {0xdf, 14}, {0xe0, 14},
1837 :     {0xe1, 14}, {0xe2, 14}, {0xe3, 14}, {0xe4, 14},
1838 :     {0xe5, 14}, {0xe6, 14}, {0xe7, 14}, {0xe8, 14},
1839 :     {0xe9, 14}, {0xea, 14}, {0xeb, 14}, {0xec, 14},
1840 :     {0xed, 14}, {0xee, 14}, {0xef, 14}, {0xf0, 14},
1841 :     {0xf1, 14}, {0xf2, 14}, {0xf3, 14}, {0xf4, 14},
1842 :     {0xf5, 14}, {0xf6, 14}, {0xf7, 14}, {0xf8, 14},
1843 :     {0xf9, 14}, {0xfa, 14}, {0xfb, 14}, {0xfc, 14},
1844 :     {0xfd, 14}, {0xfe, 14}, {0xff, 14}, {0x180, 16},
1845 :     {0x181, 16}, {0x182, 16}, {0x183, 16}, {0x184, 16},
1846 :     {0x185, 16}, {0x186, 16}, {0x187, 16}, {0x188, 16},
1847 :     {0x189, 16}, {0x18a, 16}, {0x18b, 16}, {0x18c, 16},
1848 :     {0x18d, 16}, {0x18e, 16}, {0x18f, 16}, {0x190, 16},
1849 :     {0x191, 16}, {0x192, 16}, {0x193, 16}, {0x194, 16},
1850 :     {0x195, 16}, {0x196, 16}, {0x197, 16}, {0x198, 16},
1851 :     {0x199, 16}, {0x19a, 16}, {0x19b, 16}, {0x19c, 16},
1852 :     {0x19d, 16}, {0x19e, 16}, {0x19f, 16}, {0x1a0, 16},
1853 :     {0x1a1, 16}, {0x1a2, 16}, {0x1a3, 16}, {0x1a4, 16},
1854 :     {0x1a5, 16}, {0x1a6, 16}, {0x1a7, 16}, {0x1a8, 16},
1855 :     {0x1a9, 16}, {0x1aa, 16}, {0x1ab, 16}, {0x1ac, 16},
1856 :     {0x1ad, 16}, {0x1ae, 16}, {0x1af, 16}, {0x1b0, 16},
1857 :     {0x1b1, 16}, {0x1b2, 16}, {0x1b3, 16}, {0x1b4, 16},
1858 :     {0x1b5, 16}, {0x1b6, 16}, {0x1b7, 16}, {0x1b8, 16},
1859 :     {0x1b9, 16}, {0x1ba, 16}, {0x1bb, 16}, {0x1bc, 16},
1860 :     {0x1bd, 16}, {0x1be, 16}, {0x1bf, 16}, {0x1c0, 16},
1861 :     {0x1c1, 16}, {0x1c2, 16}, {0x1c3, 16}, {0x1c4, 16},
1862 :     {0x1c5, 16}, {0x1c6, 16}, {0x1c7, 16}, {0x1c8, 16},
1863 :     {0x1c9, 16}, {0x1ca, 16}, {0x1cb, 16}, {0x1cc, 16},
1864 :     {0x1cd, 16}, {0x1ce, 16}, {0x1cf, 16}, {0x1d0, 16},
1865 :     {0x1d1, 16}, {0x1d2, 16}, {0x1d3, 16}, {0x1d4, 16},
1866 :     {0x1d5, 16}, {0x1d6, 16}, {0x1d7, 16}, {0x1d8, 16},
1867 :     {0x1d9, 16}, {0x1da, 16}, {0x1db, 16}, {0x1dc, 16},
1868 :     {0x1dd, 16}, {0x1de, 16}, {0x1df, 16}, {0x1e0, 16},
1869 :     {0x1e1, 16}, {0x1e2, 16}, {0x1e3, 16}, {0x1e4, 16},
1870 :     {0x1e5, 16}, {0x1e6, 16}, {0x1e7, 16}, {0x1e8, 16},
1871 :     {0x1e9, 16}, {0x1ea, 16}, {0x1eb, 16}, {0x1ec, 16},
1872 :     {0x1ed, 16}, {0x1ee, 16}, {0x1ef, 16}, {0x1f0, 16},
1873 :     {0x1f1, 16}, {0x1f2, 16}, {0x1f3, 16}, {0x1f4, 16},
1874 :     {0x1f5, 16}, {0x1f6, 16}, {0x1f7, 16}, {0x1f8, 16},
1875 :     {0x1f9, 16}, {0x1fa, 16}, {0x1fb, 16}, {0x1fc, 16},
1876 :     {0x1fd, 16}, {0x1fe, 16}, {0x1ff, 16},
1877 :     };
1878 :    
1879 :    
1880 :     const VLC mb_motion_table[65] = {
1881 :     {0x05, 13}, {0x07, 13}, {0x05, 12}, {0x07, 12},
1882 :     {0x09, 12}, {0x0b, 12}, {0x0d, 12}, {0x0f, 12},
1883 :     {0x09, 11}, {0x0b, 11}, {0x0d, 11}, {0x0f, 11},
1884 :     {0x11, 11}, {0x13, 11}, {0x15, 11}, {0x17, 11},
1885 :     {0x19, 11}, {0x1b, 11}, {0x1d, 11}, {0x1f, 11},
1886 :     {0x21, 11}, {0x23, 11}, {0x13, 10}, {0x15, 10},
1887 :     {0x17, 10}, {0x07, 8}, {0x09, 8}, {0x0b, 8},
1888 :     {0x07, 7}, {0x03, 5}, {0x03, 4}, {0x03, 3},
1889 :     {0x01, 1}, {0x02, 3}, {0x02, 4}, {0x02, 5},
1890 :     {0x06, 7}, {0x0a, 8}, {0x08, 8}, {0x06, 8},
1891 :     {0x16, 10}, {0x14, 10}, {0x12, 10}, {0x22, 11},
1892 :     {0x20, 11}, {0x1e, 11}, {0x1c, 11}, {0x1a, 11},
1893 :     {0x18, 11}, {0x16, 11}, {0x14, 11}, {0x12, 11},
1894 :     {0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11},
1895 :     {0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12},
1896 :     {0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13},
1897 :     {0x04, 13}
1898 :     };
1899 :    
1900 :    
1901 :     /******************************************************************
1902 :     * decoder tables *
1903 :     ******************************************************************/
1904 :    
1905 :     VLC const mcbpc_intra_table[64] = {
1906 :     {-1, 0}, {20, 6}, {36, 6}, {52, 6}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
1907 :     {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3},
1908 :     {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3},
1909 :     {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3},
1910 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1911 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1912 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1913 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}
1914 :     };
1915 :    
1916 :     VLC const mcbpc_inter_table[257] = {
1917 :     {VLC_ERROR, 0}, {255, 9}, {52, 9}, {36, 9}, {20, 9}, {49, 9}, {35, 8}, {35, 8},
1918 :     {19, 8}, {19, 8}, {50, 8}, {50, 8}, {51, 7}, {51, 7}, {51, 7}, {51, 7},
1919 :     {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
1920 :     {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
1921 :     {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6},
1922 :     {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6},
1923 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1924 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1925 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1926 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1927 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1928 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1929 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1930 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1931 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1932 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1933 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1934 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1935 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1936 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1937 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1938 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1939 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1940 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1941 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1942 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1943 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1944 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1945 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1946 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1947 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1948 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1949 :     {0, 1}
1950 :     };
1951 :    
1952 :     VLC const cbpy_table[64] = {
1953 :     {-1, 0}, {-1, 0}, {6, 6}, {9, 6}, {8, 5}, {8, 5}, {4, 5}, {4, 5},
1954 :     {2, 5}, {2, 5}, {1, 5}, {1, 5}, {0, 4}, {0, 4}, {0, 4}, {0, 4},
1955 :     {12, 4}, {12, 4}, {12, 4}, {12, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4},
1956 :     {14, 4}, {14, 4}, {14, 4}, {14, 4}, {5, 4}, {5, 4}, {5, 4}, {5, 4},
1957 :     {13, 4}, {13, 4}, {13, 4}, {13, 4}, {3, 4}, {3, 4}, {3, 4}, {3, 4},
1958 :     {11, 4}, {11, 4}, {11, 4}, {11, 4}, {7, 4}, {7, 4}, {7, 4}, {7, 4},
1959 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2},
1960 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}
1961 :     };
1962 :    
1963 :     VLC const TMNMVtab0[] = {
1964 :     {3, 4}, {-3, 4}, {2, 3}, {2, 3}, {-2, 3}, {-2, 3}, {1, 2},
1965 :     {1, 2}, {1, 2}, {1, 2}, {-1, 2}, {-1, 2}, {-1, 2}, {-1, 2}
1966 :     };
1967 :    
1968 :     VLC const TMNMVtab1[] = {
1969 :     {12, 10}, {-12, 10}, {11, 10}, {-11, 10},
1970 :     {10, 9}, {10, 9}, {-10, 9}, {-10, 9},
1971 :     {9, 9}, {9, 9}, {-9, 9}, {-9, 9},
1972 :     {8, 9}, {8, 9}, {-8, 9}, {-8, 9},
1973 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1974 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1975 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1976 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1977 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1978 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1979 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1980 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1981 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1982 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1983 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1984 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1985 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1986 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1987 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1988 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1989 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1990 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1991 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1992 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6}
1993 :     };
1994 :    
1995 :     VLC const TMNMVtab2[] = {
1996 :     {32, 12}, {-32, 12}, {31, 12}, {-31, 12},
1997 :     {30, 11}, {30, 11}, {-30, 11}, {-30, 11},
1998 :     {29, 11}, {29, 11}, {-29, 11}, {-29, 11},
1999 :     {28, 11}, {28, 11}, {-28, 11}, {-28, 11},
2000 :     {27, 11}, {27, 11}, {-27, 11}, {-27, 11},
2001 :     {26, 11}, {26, 11}, {-26, 11}, {-26, 11},
2002 :     {25, 11}, {25, 11}, {-25, 11}, {-25, 11},
2003 :     {24, 10}, {24, 10}, {24, 10}, {24, 10},
2004 :     {-24, 10}, {-24, 10}, {-24, 10}, {-24, 10},
2005 :     {23, 10}, {23, 10}, {23, 10}, {23, 10},
2006 :     {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10},
2007 :     {22, 10}, {22, 10}, {22, 10}, {22, 10},
2008 :     {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},
2009 :     {21, 10}, {21, 10}, {21, 10}, {21, 10},
2010 :     {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},
2011 :     {20, 10}, {20, 10}, {20, 10}, {20, 10},
2012 :     {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10},
2013 :     {19, 10}, {19, 10}, {19, 10}, {19, 10},
2014 :     {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},
2015 :     {18, 10}, {18, 10}, {18, 10}, {18, 10},
2016 :     {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10},
2017 :     {17, 10}, {17, 10}, {17, 10}, {17, 10},
2018 :     {-17, 10}, {-17, 10}, {-17, 10}, {-17, 10},
2019 :     {16, 10}, {16, 10}, {16, 10}, {16, 10},
2020 :     {-16, 10}, {-16, 10}, {-16, 10}, {-16, 10},
2021 :     {15, 10}, {15, 10}, {15, 10}, {15, 10},
2022 :     {-15, 10}, {-15, 10}, {-15, 10}, {-15, 10},
2023 :     {14, 10}, {14, 10}, {14, 10}, {14, 10},
2024 :     {-14, 10}, {-14, 10}, {-14, 10}, {-14, 10},
2025 :     {13, 10}, {13, 10}, {13, 10}, {13, 10},
2026 :     {-13, 10}, {-13, 10}, {-13, 10}, {-13, 10}
2027 :     };
2028 :    
2029 :     short const dc_threshold[] = {
2030 :     21514, 26984, 8307, 28531, 29798, 24951, 25970, 26912,
2031 :     8307, 25956, 26994, 25974, 8292, 29286, 28015, 29728,
2032 :     25960, 18208, 21838, 18208, 19536, 22560, 26998, 8260,
2033 :     28515, 25956, 8291, 25640, 30309, 27749, 11817, 22794,
2034 :     30063, 8306, 28531, 29798, 24951, 25970, 25632, 29545,
2035 :     29300, 25193, 29813, 29295, 26656, 29537, 29728, 8303,
2036 :     26983, 25974, 24864, 25443, 29541, 8307, 28532, 26912,
2037 :     29556, 29472, 30063, 25458, 8293, 28515, 25956, 2606
2038 :     };
2039 :    
2040 :     VLC const dc_lum_tab[] = {
2041 :     {0, 0}, {4, 3}, {3, 3}, {0, 3},
2042 :     {2, 2}, {2, 2}, {1, 2}, {1, 2},
2043 :     };

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