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1 : edgomez 851 /******************************************************************************
2 :     * *
3 :     * This file is part of XviD, a free MPEG-4 video encoder/decoder *
4 :     * *
5 :     * XviD is an implementation of a part of one or more MPEG-4 Video tools *
6 :     * as specified in ISO/IEC 14496-2 standard. Those intending to use this *
7 :     * software module in hardware or software products are advised that its *
8 :     * use may infringe existing patents or copyrights, and any such use *
9 :     * would be at such party's own risk. The original developer of this *
10 :     * software module and his/her company, and subsequent editors and their *
11 :     * companies, will have no liability for use of this software or *
12 :     * modifications or derivatives thereof. *
13 :     * *
14 :     * XviD is free software; you can redistribute it and/or modify it *
15 :     * under the terms of the GNU General Public License as published by *
16 :     * the Free Software Foundation; either version 2 of the License, or *
17 :     * (at your option) any later version. *
18 :     * *
19 :     * XviD is distributed in the hope that it will be useful, but *
20 :     * WITHOUT ANY WARRANTY; without even the implied warranty of *
21 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 :     * GNU General Public License for more details. *
23 :     * *
24 :     * You should have received a copy of the GNU General Public License *
25 :     * along with this program; if not, write to the Free Software *
26 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
27 :     * *
28 :     ******************************************************************************/
29 : suxen_drol 118
30 : edgomez 851 /******************************************************************************
31 :     * *
32 :     * mbcoding.c *
33 :     * *
34 :     * Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> *
35 :     * *
36 :     * For more information visit the XviD homepage: http://www.xvid.org *
37 :     * *
38 :     ******************************************************************************/
39 :    
40 :     /******************************************************************************
41 :     * *
42 :     * Revision history: *
43 :     * *
44 :     * 28.10.2002 GMC support - gruel *
45 :     * 28.06.2002 added check_resync_marker() *
46 :     * 14.04.2002 bframe encoding *
47 :     * 08.03.2002 initial version; isibaar *
48 :     * *
49 :     ******************************************************************************/
50 :    
51 :    
52 :     #include <stdio.h>
53 : Isibaar 100 #include <stdlib.h>
54 : chl 995 #include <string.h>
55 :    
56 : Isibaar 3 #include "../portab.h"
57 : edgomez 851 #include "../global.h"
58 : Isibaar 3 #include "bitstream.h"
59 :     #include "zigzag.h"
60 :     #include "vlc_codes.h"
61 : Isibaar 100 #include "mbcoding.h"
62 : Isibaar 3
63 :     #include "../utils/mbfunctions.h"
64 :    
65 : edgomez 766 /* #define BIGLUT */
66 : edgomez 764
67 : edgomez 766 #ifdef BIGLUT
68 : edgomez 764 #define LEVELOFFSET 2048
69 :     #else
70 :     #define LEVELOFFSET 32
71 :     #endif
72 :    
73 :     static REVERSE_EVENT DCT3D[2][4096];
74 : Isibaar 3
75 : edgomez 766 #ifdef BIGLUT
76 : edgomez 764 static VLC coeff_VLC[2][2][4096][64];
77 : edgomez 851 VLC *intra_table;
78 :     static VLC *inter_table;
79 : edgomez 764 #else
80 :     static VLC coeff_VLC[2][2][64][64];
81 :     #endif
82 : edgomez 451
83 : edgomez 851 /* not really MB related, but VLCs are only available here */
84 :     void bs_put_spritetrajectory(Bitstream * bs, const int val)
85 :     {
86 :     const int code = sprite_trajectory_code[val+16384].code;
87 :     const int len = sprite_trajectory_code[val+16384].len;
88 :     const int code2 = sprite_trajectory_len[len].code;
89 :     const int len2 = sprite_trajectory_len[len].len;
90 : edgomez 451
91 : edgomez 1053 #if 0
92 :     printf("GMC=%d Code/Len = %d / %d ",val, code,len);
93 :     printf("Code2 / Len2 = %d / %d \n",code2,len2);
94 :     #endif
95 : edgomez 851
96 :     BitstreamPutBits(bs, code2, len2);
97 :     if (len) BitstreamPutBits(bs, code, len);
98 :     }
99 :    
100 :     int bs_get_spritetrajectory(Bitstream * bs)
101 :     {
102 :     int i;
103 :     for (i = 0; i < 12; i++)
104 :     {
105 :     if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code)
106 :     {
107 :     BitstreamSkip(bs, sprite_trajectory_len[i].len);
108 :     return i;
109 :     }
110 :     }
111 :     return -1;
112 :     }
113 :    
114 : edgomez 195 void
115 :     init_vlc_tables(void)
116 : Isibaar 3 {
117 : edgomez 851 uint32_t i, j, k, intra, last, run, run_esc, level, level_esc, escape, escape_len, offset;
118 :     int32_t l;
119 : edgomez 78
120 : edgomez 766 #ifdef BIGLUT
121 : edgomez 851 intra_table = coeff_VLC[1];
122 :     inter_table = coeff_VLC[0];
123 : edgomez 764 #endif
124 : Isibaar 3
125 : edgomez 195
126 : edgomez 764 for (intra = 0; intra < 2; intra++)
127 :     for (i = 0; i < 4096; i++)
128 :     DCT3D[intra][i].event.level = 0;
129 : edgomez 195
130 : edgomez 764 for (intra = 0; intra < 2; intra++)
131 :     for (last = 0; last < 2; last++)
132 :     {
133 :     for (run = 0; run < 63 + last; run++)
134 : edgomez 845 for (level = 0; level < (uint32_t)(32 << intra); level++)
135 : edgomez 764 {
136 : edgomez 766 #ifdef BIGLUT
137 : edgomez 764 offset = LEVELOFFSET;
138 :     #else
139 :     offset = !intra * LEVELOFFSET;
140 :     #endif
141 :     coeff_VLC[intra][last][level + offset][run].len = 128;
142 :     }
143 :     }
144 : Isibaar 3
145 : edgomez 764 for (intra = 0; intra < 2; intra++)
146 :     for (i = 0; i < 102; i++)
147 :     {
148 : edgomez 766 #ifdef BIGLUT
149 : edgomez 764 offset = LEVELOFFSET;
150 :     #else
151 :     offset = !intra * LEVELOFFSET;
152 :     #endif
153 : edgomez 816 for (j = 0; j < (uint32_t)(1 << (12 - coeff_tab[intra][i].vlc.len)); j++)
154 : edgomez 764 {
155 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len;
156 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event;
157 :     }
158 : edgomez 195
159 : 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
160 :     = coeff_tab[intra][i].vlc.code << 1;
161 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len
162 :     = coeff_tab[intra][i].vlc.len + 1;
163 : edgomez 766 #ifndef BIGLUT
164 : edgomez 764 if (!intra)
165 :     #endif
166 :     {
167 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code
168 :     = (coeff_tab[intra][i].vlc.code << 1) | 1;
169 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len
170 :     = coeff_tab[intra][i].vlc.len + 1;
171 :     }
172 :     }
173 : edgomez 195
174 : edgomez 764 for (intra = 0; intra < 2; intra++)
175 :     for (last = 0; last < 2; last++)
176 :     for (run = 0; run < 63 + last; run++)
177 :     {
178 : edgomez 816 for (level = 1; level < (uint32_t)(32 << intra); level++)
179 : edgomez 764 {
180 : edgomez 766 if (level <= max_level[intra][last][run] && run <= max_run[intra][last][level])
181 :     continue;
182 :    
183 :     #ifdef BIGLUT
184 : edgomez 764 offset = LEVELOFFSET;
185 :     #else
186 :     offset = !intra * LEVELOFFSET;
187 :     #endif
188 : edgomez 766 level_esc = level - max_level[intra][last][run];
189 :     run_esc = run - 1 - max_run[intra][last][level];
190 : edgomez 851 /*use this test to use shorter esc2 codes when possible
191 :     if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc]
192 :     && !(coeff_VLC[intra][last][level_esc + offset][run].len + 7 + 1
193 :     > coeff_VLC[intra][last][level + offset][run_esc].code + 7 + 2))*/
194 : edgomez 766
195 :     if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc])
196 :     {
197 :     escape = ESCAPE1;
198 :     escape_len = 7 + 1;
199 :     run_esc = run;
200 :     }
201 :     else
202 :     {
203 : edgomez 816 if (run_esc <= max_run[intra][last][level] && level <= max_level[intra][last][run_esc])
204 : edgomez 764 {
205 : edgomez 766 escape = ESCAPE2;
206 :     escape_len = 7 + 2;
207 :     level_esc = level;
208 : edgomez 764 }
209 : edgomez 766 else
210 : edgomez 764 {
211 : edgomez 766 #ifndef BIGLUT
212 : edgomez 764 if (!intra)
213 :     #endif
214 :     {
215 : edgomez 766 coeff_VLC[intra][last][level + offset][run].code
216 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
217 :     coeff_VLC[intra][last][level + offset][run].len = 30;
218 :     coeff_VLC[intra][last][offset - level][run].code
219 : suxen_drol 883 = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-(int32_t)level & 0xfff) << 1) | 1;
220 : edgomez 766 coeff_VLC[intra][last][offset - level][run].len = 30;
221 : edgomez 764 }
222 : edgomez 766 continue;
223 : edgomez 764 }
224 : edgomez 766 }
225 :    
226 :     coeff_VLC[intra][last][level + offset][run].code
227 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
228 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code;
229 :     coeff_VLC[intra][last][level + offset][run].len
230 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
231 :     #ifndef BIGLUT
232 : edgomez 764 if (!intra)
233 :     #endif
234 : edgomez 766 {
235 :     coeff_VLC[intra][last][offset - level][run].code
236 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
237 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code | 1;
238 :     coeff_VLC[intra][last][offset - level][run].len
239 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
240 :     }
241 : Isibaar 3 }
242 : edgomez 766
243 :     #ifdef BIGLUT
244 : edgomez 851 for (level = 32 << intra; level < 2048; level++)
245 : edgomez 764 {
246 :     coeff_VLC[intra][last][level + offset][run].code
247 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
248 :     coeff_VLC[intra][last][level + offset][run].len = 30;
249 : Isibaar 100
250 : edgomez 764 coeff_VLC[intra][last][offset - level][run].code
251 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1;
252 :     coeff_VLC[intra][last][offset - level][run].len = 30;
253 : Isibaar 100 }
254 : edgomez 764 #else
255 :     if (!intra)
256 :     {
257 :     coeff_VLC[intra][last][0][run].code
258 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1;
259 :     coeff_VLC[intra][last][0][run].len = 30;
260 :     }
261 :     #endif
262 : Isibaar 3 }
263 : edgomez 851 /* init sprite_trajectory tables */
264 :     /* even if GMC is not specified (it might be used later...) */
265 : edgomez 845
266 : edgomez 851 sprite_trajectory_code[0+16384].code = 0;
267 :     sprite_trajectory_code[0+16384].len = 0;
268 :     for (k=0;k<14;k++)
269 :     {
270 :     int limit = (1<<k);
271 : edgomez 845
272 : edgomez 851 for (l=-(2*limit-1); l <= -limit; l++)
273 :     {
274 :     sprite_trajectory_code[l+16384].code = (2*limit-1)+l;
275 :     sprite_trajectory_code[l+16384].len = k+1;
276 :     }
277 :    
278 :     for (l=limit; l<= 2*limit-1; l++)
279 :     {
280 :     sprite_trajectory_code[l+16384].code = l;
281 :     sprite_trajectory_code[l+16384].len = k+1;
282 :     }
283 :     }
284 : Isibaar 3 }
285 :    
286 : edgomez 195 static __inline void
287 :     CodeVector(Bitstream * bs,
288 :     int32_t value,
289 :     int32_t f_code,
290 :     Statistics * pStat)
291 : Isibaar 3 {
292 : edgomez 78
293 : Isibaar 3 const int scale_factor = 1 << (f_code - 1);
294 :     const int cmp = scale_factor << 5;
295 :    
296 : edgomez 195 if (value < (-1 * cmp))
297 : Isibaar 3 value += 64 * scale_factor;
298 : edgomez 195
299 :     if (value > (cmp - 1))
300 : Isibaar 3 value -= 64 * scale_factor;
301 :    
302 : edgomez 78 pStat->iMvSum += value * value;
303 :     pStat->iMvCount++;
304 : Isibaar 3
305 : edgomez 78 if (value == 0) {
306 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[32].code,
307 :     mb_motion_table[32].len);
308 : edgomez 78 } else {
309 : Isibaar 3 uint16_t length, code, mv_res, sign;
310 : edgomez 195
311 : Isibaar 3 length = 16 << f_code;
312 :     f_code--;
313 : edgomez 195
314 : Isibaar 3 sign = (value < 0);
315 :    
316 : edgomez 195 if (value >= length)
317 : Isibaar 3 value -= 2 * length;
318 : edgomez 195 else if (value < -length)
319 : Isibaar 3 value += 2 * length;
320 :    
321 : edgomez 195 if (sign)
322 : Isibaar 3 value = -value;
323 :    
324 :     value--;
325 :     mv_res = value & ((1 << f_code) - 1);
326 :     code = ((value - mv_res) >> f_code) + 1;
327 :    
328 : edgomez 195 if (sign)
329 : Isibaar 3 code = -code;
330 :    
331 :     code += 32;
332 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[code].code,
333 :     mb_motion_table[code].len);
334 :    
335 :     if (f_code)
336 : Isibaar 3 BitstreamPutBits(bs, mv_res, f_code);
337 : edgomez 78 }
338 :    
339 : Isibaar 3 }
340 :    
341 : edgomez 766 #ifdef BIGLUT
342 : edgomez 764
343 : edgomez 195 static __inline void
344 :     CodeCoeff(Bitstream * bs,
345 :     const int16_t qcoeff[64],
346 :     VLC * table,
347 :     const uint16_t * zigzag,
348 :     uint16_t intra)
349 : edgomez 78 {
350 :    
351 : Isibaar 3 uint32_t j, last;
352 :     short v;
353 :     VLC *vlc;
354 : edgomez 195
355 : Isibaar 3 j = intra;
356 : Isibaar 116 last = intra;
357 : Isibaar 3
358 : edgomez 195 while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
359 :     j++;
360 :    
361 : Isibaar 3 do {
362 : edgomez 764 vlc = table + 64 * 2048 + (v << 6) + j - last;
363 : Isibaar 116 last = ++j;
364 : Isibaar 153
365 : edgomez 677 /* count zeroes */
366 : edgomez 195 while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
367 :     j++;
368 :    
369 : edgomez 677 /* write code */
370 : edgomez 195 if (j != 64) {
371 : Isibaar 3 BitstreamPutBits(bs, vlc->code, vlc->len);
372 :     } else {
373 : edgomez 764 vlc += 64 * 4096;
374 : Isibaar 3 BitstreamPutBits(bs, vlc->code, vlc->len);
375 :     break;
376 :     }
377 : edgomez 195 } while (1);
378 : edgomez 78
379 : Isibaar 3 }
380 :    
381 : edgomez 851
382 :    
383 :     /* returns the number of bits required to encode qcoeff */
384 :     int
385 :     CodeCoeff_CalcBits(const int16_t qcoeff[64],
386 :     VLC * table,
387 :     const uint16_t * zigzag,
388 :     uint16_t intra)
389 :     {
390 :     int bits = 0;
391 :     uint32_t j, last;
392 :     short v;
393 :     VLC *vlc;
394 :    
395 :     j = intra;
396 :     last = intra;
397 :    
398 :     while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
399 :     j++;
400 :    
401 :     if (j >= 64) return 0; /* empty block */
402 :    
403 :     do {
404 :     vlc = table + 64 * 2048 + (v << 6) + j - last;
405 :     last = ++j;
406 :    
407 :     /* count zeroes */
408 :     while (j < 64 && (v = qcoeff[zigzag[j]]) == 0)
409 :     j++;
410 :    
411 :     /* write code */
412 :     if (j != 64) {
413 :     bits += vlc->len;
414 :     } else {
415 :     vlc += 64 * 4096;
416 :     bits += vlc->len;
417 :     break;
418 :     }
419 :     } while (1);
420 :    
421 :     return bits;
422 :     }
423 :    
424 :    
425 : edgomez 764 #else
426 :    
427 :     static __inline void
428 :     CodeCoeffInter(Bitstream * bs,
429 :     const int16_t qcoeff[64],
430 :     const uint16_t * zigzag)
431 :     {
432 :     uint32_t i, run, prev_run, code, len;
433 :     int32_t level, prev_level, level_shifted;
434 :    
435 :     i = 0;
436 :     run = 0;
437 :    
438 :     while (!(level = qcoeff[zigzag[i++]]))
439 :     run++;
440 :    
441 :     prev_level = level;
442 :     prev_run = run;
443 :     run = 0;
444 :    
445 :     while (i < 64)
446 :     {
447 :     if ((level = qcoeff[zigzag[i++]]) != 0)
448 :     {
449 :     level_shifted = prev_level + 32;
450 :     if (!(level_shifted & -64))
451 :     {
452 :     code = coeff_VLC[0][0][level_shifted][prev_run].code;
453 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
454 :     }
455 :     else
456 :     {
457 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
458 :     len = 30;
459 :     }
460 :     BitstreamPutBits(bs, code, len);
461 :     prev_level = level;
462 :     prev_run = run;
463 :     run = 0;
464 :     }
465 :     else
466 :     run++;
467 :     }
468 :    
469 :     level_shifted = prev_level + 32;
470 :     if (!(level_shifted & -64))
471 :     {
472 :     code = coeff_VLC[0][1][level_shifted][prev_run].code;
473 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
474 :     }
475 :     else
476 :     {
477 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
478 :     len = 30;
479 :     }
480 :     BitstreamPutBits(bs, code, len);
481 :     }
482 :    
483 :     static __inline void
484 :     CodeCoeffIntra(Bitstream * bs,
485 :     const int16_t qcoeff[64],
486 :     const uint16_t * zigzag)
487 :     {
488 :     uint32_t i, abs_level, run, prev_run, code, len;
489 :     int32_t level, prev_level;
490 :    
491 :     i = 1;
492 :     run = 0;
493 :    
494 : edgomez 851 while (i<64 && !(level = qcoeff[zigzag[i++]]))
495 : edgomez 764 run++;
496 :    
497 :     prev_level = level;
498 :     prev_run = run;
499 :     run = 0;
500 :    
501 :     while (i < 64)
502 :     {
503 :     if ((level = qcoeff[zigzag[i++]]) != 0)
504 :     {
505 : edgomez 982 abs_level = abs(prev_level);
506 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
507 :     code = coeff_VLC[1][0][abs_level][prev_run].code;
508 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
509 :     if (len != 128)
510 :     code |= (prev_level < 0);
511 :     else
512 :     {
513 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
514 :     len = 30;
515 :     }
516 :     BitstreamPutBits(bs, code, len);
517 :     prev_level = level;
518 :     prev_run = run;
519 :     run = 0;
520 :     }
521 :     else
522 :     run++;
523 :     }
524 :    
525 : edgomez 982 abs_level = abs(prev_level);
526 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
527 :     code = coeff_VLC[1][1][abs_level][prev_run].code;
528 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
529 :     if (len != 128)
530 :     code |= (prev_level < 0);
531 :     else
532 :     {
533 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
534 :     len = 30;
535 :     }
536 :     BitstreamPutBits(bs, code, len);
537 :     }
538 :    
539 : edgomez 851
540 :    
541 :     /* returns the number of bits required to encode qcoeff */
542 :    
543 :     int
544 :     CodeCoeffIntra_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
545 :     {
546 :     int bits = 0;
547 :     uint32_t i, abs_level, run, prev_run, len;
548 :     int32_t level, prev_level;
549 :    
550 :     i = 1;
551 :     run = 0;
552 :    
553 :     while (i<64 && !(level = qcoeff[zigzag[i++]]))
554 :     run++;
555 :    
556 :     if (i >= 64) return 0; /* empty block */
557 :    
558 :     prev_level = level;
559 :     prev_run = run;
560 :     run = 0;
561 :    
562 :     while (i < 64)
563 :     {
564 :     if ((level = qcoeff[zigzag[i++]]) != 0)
565 :     {
566 : edgomez 982 abs_level = abs(prev_level);
567 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
568 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
569 :     bits += len!=128 ? len : 30;
570 :    
571 :     prev_level = level;
572 :     prev_run = run;
573 :     run = 0;
574 :     }
575 :     else
576 :     run++;
577 :     }
578 :    
579 : edgomez 982 abs_level = abs(prev_level);
580 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
581 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
582 :     bits += len!=128 ? len : 30;
583 :    
584 :     return bits;
585 :     }
586 :    
587 :     int
588 :     CodeCoeffInter_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
589 :     {
590 :     uint32_t i, run, prev_run, len;
591 :     int32_t level, prev_level, level_shifted;
592 :     int bits = 0;
593 :    
594 :     i = 0;
595 :     run = 0;
596 :    
597 :     while (!(level = qcoeff[zigzag[i++]]))
598 :     run++;
599 :    
600 :     prev_level = level;
601 :     prev_run = run;
602 :     run = 0;
603 :    
604 :     while (i < 64) {
605 :     if ((level = qcoeff[zigzag[i++]]) != 0) {
606 :     level_shifted = prev_level + 32;
607 :     if (!(level_shifted & -64))
608 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
609 :     else
610 :     len = 30;
611 :    
612 :     bits += len;
613 :     prev_level = level;
614 :     prev_run = run;
615 :     run = 0;
616 :     }
617 :     else
618 :     run++;
619 :     }
620 :    
621 :     level_shifted = prev_level + 32;
622 :     if (!(level_shifted & -64))
623 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
624 :     else
625 :     len = 30;
626 :     bits += len;
627 :    
628 :     return bits;
629 :     }
630 :    
631 :    
632 : edgomez 764 #endif
633 :    
634 : suxen_drol 926
635 :     static int iDQtab[5] = {
636 :     1, 0, -1 /* no change */, 2, 3
637 :     };
638 :     #define DQ_VALUE2INDEX(value) iDQtab[(value)+2]
639 :    
640 :    
641 : edgomez 851 static __inline void
642 :     CodeBlockIntra(const FRAMEINFO * const frame,
643 : edgomez 195 const MACROBLOCK * pMB,
644 :     int16_t qcoeff[6 * 64],
645 : edgomez 78 Bitstream * bs,
646 :     Statistics * pStat)
647 : Isibaar 3 {
648 : edgomez 78
649 : Isibaar 3 uint32_t i, mcbpc, cbpy, bits;
650 :    
651 :     cbpy = pMB->cbp >> 2;
652 :    
653 : edgomez 1053 /* write mcbpc */
654 : edgomez 195 if (frame->coding_type == I_VOP) {
655 : edgomez 78 mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2);
656 : edgomez 195 BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code,
657 :     mcbpc_intra_tab[mcbpc].len);
658 :     } else {
659 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
660 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
661 :     mcbpc_inter_tab[mcbpc].len);
662 : Isibaar 28 }
663 : Isibaar 3
664 : edgomez 1053 /* ac prediction flag */
665 : edgomez 195 if (pMB->acpred_directions[0])
666 : edgomez 78 BitstreamPutBits(bs, 1, 1);
667 : Isibaar 3 else
668 : edgomez 78 BitstreamPutBits(bs, 0, 1);
669 : Isibaar 3
670 : edgomez 1053 /* write cbpy */
671 : edgomez 958 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
672 : Isibaar 3
673 : edgomez 1053 /* write dquant */
674 : edgomez 195 if (pMB->mode == MODE_INTRA_Q)
675 : suxen_drol 926 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
676 : Isibaar 3
677 : edgomez 1053 /* write interlacing */
678 : edgomez 949 if (frame->vol_flags & XVID_VOL_INTERLACING) {
679 : h 69 BitstreamPutBit(bs, pMB->field_dct);
680 :     }
681 : edgomez 1053 /* code block coeffs */
682 : edgomez 195 for (i = 0; i < 6; i++) {
683 :     if (i < 4)
684 :     BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code,
685 :     dcy_tab[qcoeff[i * 64 + 0] + 255].len);
686 : Isibaar 3 else
687 : edgomez 195 BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code,
688 :     dcc_tab[qcoeff[i * 64 + 0] + 255].len);
689 :    
690 :     if (pMB->cbp & (1 << (5 - i))) {
691 : edgomez 851 const uint16_t *scan_table =
692 : edgomez 949 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
693 : edgomez 851 scan_tables[2] : scan_tables[pMB->acpred_directions[i]];
694 :    
695 : Isibaar 3 bits = BitstreamPos(bs);
696 :    
697 : edgomez 766 #ifdef BIGLUT
698 : edgomez 851 CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1);
699 : edgomez 764 #else
700 : edgomez 851 CodeCoeffIntra(bs, &qcoeff[i * 64], scan_table);
701 : edgomez 764 #endif
702 : edgomez 851
703 : Isibaar 3 bits = BitstreamPos(bs) - bits;
704 :     pStat->iTextBits += bits;
705 :     }
706 :     }
707 : edgomez 78
708 : Isibaar 3 }
709 :    
710 :    
711 : edgomez 195 static void
712 : edgomez 851 CodeBlockInter(const FRAMEINFO * const frame,
713 : edgomez 195 const MACROBLOCK * pMB,
714 :     int16_t qcoeff[6 * 64],
715 : edgomez 78 Bitstream * bs,
716 :     Statistics * pStat)
717 : Isibaar 3 {
718 : edgomez 78
719 : Isibaar 3 int32_t i;
720 :     uint32_t bits, mcbpc, cbpy;
721 :    
722 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
723 : Isibaar 3 cbpy = 15 - (pMB->cbp >> 2);
724 :    
725 : edgomez 1053 /* write mcbpc */
726 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
727 :     mcbpc_inter_tab[mcbpc].len);
728 : Isibaar 3
729 : edgomez 851 if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) )
730 : edgomez 1053 BitstreamPutBit(bs, pMB->mcsel); /* mcsel: '0'=local motion, '1'=GMC */
731 : edgomez 851
732 : edgomez 1053 /* write cbpy */
733 : edgomez 958 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
734 : Isibaar 3
735 : edgomez 1053 /* write dquant */
736 : edgomez 195 if (pMB->mode == MODE_INTER_Q)
737 : suxen_drol 926 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
738 : edgomez 195
739 : edgomez 1053 /* interlacing */
740 : edgomez 949 if (frame->vol_flags & XVID_VOL_INTERLACING) {
741 : h 388 if (pMB->cbp) {
742 :     BitstreamPutBit(bs, pMB->field_dct);
743 : edgomez 1038 DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", pMB->field_dct);
744 : h 388 }
745 : h 69
746 : edgomez 1053 /* if inter block, write field ME flag */
747 : edgomez 195 if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) {
748 : h 69 BitstreamPutBit(bs, pMB->field_pred);
749 : edgomez 1038 DPRINTF(XVID_DEBUG_MB,"codep: field_pred: %i\n", pMB->field_pred);
750 : h 69
751 : edgomez 1053 /* write field prediction references */
752 : edgomez 195 if (pMB->field_pred) {
753 : h 69 BitstreamPutBit(bs, pMB->field_for_top);
754 :     BitstreamPutBit(bs, pMB->field_for_bot);
755 :     }
756 :     }
757 :     }
758 : edgomez 1053 /* code motion vector(s) if motion is local */
759 : edgomez 851 if (!pMB->mcsel)
760 :     for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) {
761 :     CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat);
762 :     CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat);
763 :     }
764 : Isibaar 3
765 :     bits = BitstreamPos(bs);
766 : edgomez 195
767 : edgomez 1053 /* code block coeffs */
768 : edgomez 195 for (i = 0; i < 6; i++)
769 :     if (pMB->cbp & (1 << (5 - i)))
770 : edgomez 851 {
771 :     const uint16_t *scan_table =
772 : edgomez 949 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
773 : edgomez 851 scan_tables[2] : scan_tables[0];
774 :    
775 : edgomez 766 #ifdef BIGLUT
776 : edgomez 851 CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0);
777 : edgomez 764 #else
778 : edgomez 851 CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
779 : edgomez 764 #endif
780 : edgomez 851 }
781 : Isibaar 3
782 :     bits = BitstreamPos(bs) - bits;
783 :     pStat->iTextBits += bits;
784 :     }
785 :    
786 :    
787 : edgomez 195 void
788 : edgomez 851 MBCoding(const FRAMEINFO * const frame,
789 : edgomez 195 MACROBLOCK * pMB,
790 :     int16_t qcoeff[6 * 64],
791 :     Bitstream * bs,
792 :     Statistics * pStat)
793 : Isibaar 3 {
794 : edgomez 851 if (frame->coding_type != I_VOP)
795 : edgomez 1053 BitstreamPutBit(bs, 0); /* not_coded */
796 : edgomez 851
797 : chl 335 if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
798 : suxen_drol 136 CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
799 : Isibaar 3 else
800 : suxen_drol 136 CodeBlockInter(frame, pMB, qcoeff, bs, pStat);
801 : edgomez 78
802 : Isibaar 3 }
803 :    
804 : edgomez 1053
805 :     /* moved to mbcoding.h so that in can be 'static __inline' */
806 :     #if 0
807 : chl 347 void
808 :     MBSkip(Bitstream * bs)
809 :     {
810 : edgomez 1053 BitstreamPutBit(bs, 1); /* not coded */
811 : chl 347 }
812 : edgomez 1053 #endif
813 : chl 347
814 : edgomez 851 /***************************************************************
815 :     * bframe encoding start
816 :     ***************************************************************/
817 : suxen_drol 118
818 : edgomez 453 /*
819 : edgomez 851 mbtype
820 :     0 1b direct(h263) mvdb
821 :     1 01b interpolate mc+q dbquant, mvdf, mvdb
822 :     2 001b backward mc+q dbquant, mvdb
823 :     3 0001b forward mc+q dbquant, mvdf
824 :     */
825 : Isibaar 3
826 : edgomez 851 static __inline void
827 :     put_bvop_mbtype(Bitstream * bs,
828 :     int value)
829 :     {
830 :     switch (value) {
831 :     case MODE_FORWARD:
832 :     BitstreamPutBit(bs, 0);
833 :     case MODE_BACKWARD:
834 :     BitstreamPutBit(bs, 0);
835 :     case MODE_INTERPOLATE:
836 :     BitstreamPutBit(bs, 0);
837 :     case MODE_DIRECT:
838 :     BitstreamPutBit(bs, 1);
839 :     default:
840 :     break;
841 :     }
842 :     }
843 :    
844 :     /*
845 :     dbquant
846 :     -2 10b
847 :     0 0b
848 :     +2 11b
849 :     */
850 :    
851 :     static __inline void
852 :     put_bvop_dbquant(Bitstream * bs,
853 :     int value)
854 :     {
855 :     switch (value) {
856 :     case 0:
857 :     BitstreamPutBit(bs, 0);
858 :     return;
859 :    
860 :     case -2:
861 :     BitstreamPutBit(bs, 1);
862 :     BitstreamPutBit(bs, 0);
863 :     return;
864 :    
865 :     case 2:
866 :     BitstreamPutBit(bs, 1);
867 :     BitstreamPutBit(bs, 1);
868 :     return;
869 :    
870 : edgomez 1053 default:; /* invalid */
871 : edgomez 851 }
872 :     }
873 :    
874 :    
875 :    
876 :     void
877 :     MBCodingBVOP(const MACROBLOCK * mb,
878 :     const int16_t qcoeff[6 * 64],
879 :     const int32_t fcode,
880 :     const int32_t bcode,
881 :     Bitstream * bs,
882 :     Statistics * pStat,
883 :     int direction)
884 :     {
885 :     int vcode = fcode;
886 :     unsigned int i;
887 :    
888 :     /* ------------------------------------------------------------------
889 :     when a block is skipped it is decoded DIRECT(0,0)
890 :     hence is interpolated from forward & backward frames
891 :     ------------------------------------------------------------------ */
892 :    
893 :     if (mb->mode == MODE_DIRECT_NONE_MV) {
894 : edgomez 1053 BitstreamPutBit(bs, 1); /* skipped */
895 : edgomez 851 return;
896 :     }
897 :    
898 : edgomez 1053 BitstreamPutBit(bs, 0); /* not skipped */
899 : edgomez 851
900 :     if (mb->cbp == 0) {
901 : edgomez 1053 BitstreamPutBit(bs, 1); /* cbp == 0 */
902 : edgomez 851 } else {
903 : edgomez 1053 BitstreamPutBit(bs, 0); /* cbp == xxx */
904 : edgomez 851 }
905 :    
906 :     put_bvop_mbtype(bs, mb->mode);
907 :    
908 :     if (mb->cbp) {
909 :     BitstreamPutBits(bs, mb->cbp, 6);
910 :     }
911 :    
912 :     if (mb->mode != MODE_DIRECT && mb->cbp != 0) {
913 : edgomez 1053 put_bvop_dbquant(bs, 0); /* todo: mb->dquant = 0 */
914 : edgomez 851 }
915 :    
916 :     switch (mb->mode) {
917 :     case MODE_INTERPOLATE:
918 : edgomez 1053 CodeVector(bs, mb->pmvs[1].x, vcode, pStat); /* forward vector of interpolate mode */
919 : edgomez 851 CodeVector(bs, mb->pmvs[1].y, vcode, pStat);
920 :     case MODE_BACKWARD:
921 :     vcode = bcode;
922 :     case MODE_FORWARD:
923 :     CodeVector(bs, mb->pmvs[0].x, vcode, pStat);
924 :     CodeVector(bs, mb->pmvs[0].y, vcode, pStat);
925 :     break;
926 :     case MODE_DIRECT:
927 : edgomez 1053 CodeVector(bs, mb->pmvs[3].x, 1, pStat); /* fcode is always 1 for delta vector */
928 :     CodeVector(bs, mb->pmvs[3].y, 1, pStat); /* prediction is always (0,0) */
929 : edgomez 851 default: break;
930 :     }
931 :    
932 :     for (i = 0; i < 6; i++) {
933 :     if (mb->cbp & (1 << (5 - i))) {
934 :     #ifdef BIGLUT
935 :     CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0);
936 :     #else
937 :     CodeCoeffInter(bs, &qcoeff[i * 64], scan_tables[0]);
938 :     #endif
939 :     }
940 :     }
941 :     }
942 :    
943 :    
944 :    
945 :     /***************************************************************
946 :     * decoding stuff starts here *
947 :     ***************************************************************/
948 :    
949 :    
950 : edgomez 1053 /*
951 :     * for IVOP addbits == 0
952 :     * for PVOP addbits == fcode - 1
953 :     * for BVOP addbits == max(fcode,bcode) - 1
954 :     * returns true or false
955 :     */
956 : suxen_drol 248 int
957 :     check_resync_marker(Bitstream * bs, int addbits)
958 :     {
959 :     uint32_t nbits;
960 :     uint32_t code;
961 :     uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
962 :    
963 :     nbits = BitstreamNumBitsToByteAlign(bs);
964 :     code = BitstreamShowBits(bs, nbits);
965 :    
966 :     if (code == (((uint32_t)1 << (nbits - 1)) - 1))
967 :     {
968 :     return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER;
969 :     }
970 :    
971 :     return 0;
972 :     }
973 :    
974 :    
975 :    
976 : edgomez 195 int
977 :     get_mcbpc_intra(Bitstream * bs)
978 : Isibaar 3 {
979 : edgomez 78
980 : Isibaar 3 uint32_t index;
981 : edgomez 195
982 : suxen_drol 248 index = BitstreamShowBits(bs, 9);
983 : Isibaar 3 index >>= 3;
984 :    
985 :     BitstreamSkip(bs, mcbpc_intra_table[index].len);
986 : edgomez 78
987 : Isibaar 3 return mcbpc_intra_table[index].code;
988 : edgomez 78
989 : Isibaar 3 }
990 :    
991 : edgomez 195 int
992 :     get_mcbpc_inter(Bitstream * bs)
993 : Isibaar 3 {
994 : edgomez 78
995 : Isibaar 3 uint32_t index;
996 : suxen_drol 248
997 : edgomez 851 index = MIN(BitstreamShowBits(bs, 9), 256);
998 : edgomez 195
999 :     BitstreamSkip(bs, mcbpc_inter_table[index].len);
1000 : edgomez 78
1001 : Isibaar 3 return mcbpc_inter_table[index].code;
1002 : edgomez 78
1003 : Isibaar 3 }
1004 :    
1005 : edgomez 195 int
1006 :     get_cbpy(Bitstream * bs,
1007 :     int intra)
1008 : Isibaar 3 {
1009 : edgomez 78
1010 : Isibaar 3 int cbpy;
1011 :     uint32_t index = BitstreamShowBits(bs, 6);
1012 :    
1013 :     BitstreamSkip(bs, cbpy_table[index].len);
1014 :     cbpy = cbpy_table[index].code;
1015 :    
1016 : edgomez 195 if (!intra)
1017 : Isibaar 3 cbpy = 15 - cbpy;
1018 :    
1019 :     return cbpy;
1020 : edgomez 78
1021 : Isibaar 3 }
1022 :    
1023 : edgomez 851 static __inline int
1024 : edgomez 195 get_mv_data(Bitstream * bs)
1025 : Isibaar 3 {
1026 : edgomez 78
1027 : Isibaar 3 uint32_t index;
1028 :    
1029 : edgomez 195 if (BitstreamGetBit(bs))
1030 : Isibaar 3 return 0;
1031 : edgomez 195
1032 : Isibaar 3 index = BitstreamShowBits(bs, 12);
1033 :    
1034 : edgomez 195 if (index >= 512) {
1035 : Isibaar 3 index = (index >> 8) - 2;
1036 :     BitstreamSkip(bs, TMNMVtab0[index].len);
1037 :     return TMNMVtab0[index].code;
1038 :     }
1039 : edgomez 195
1040 :     if (index >= 128) {
1041 : Isibaar 3 index = (index >> 2) - 32;
1042 :     BitstreamSkip(bs, TMNMVtab1[index].len);
1043 :     return TMNMVtab1[index].code;
1044 :     }
1045 :    
1046 : edgomez 195 index -= 4;
1047 : Isibaar 3
1048 :     BitstreamSkip(bs, TMNMVtab2[index].len);
1049 :     return TMNMVtab2[index].code;
1050 : edgomez 78
1051 : Isibaar 3 }
1052 :    
1053 : edgomez 195 int
1054 :     get_mv(Bitstream * bs,
1055 :     int fcode)
1056 : Isibaar 3 {
1057 : edgomez 78
1058 : Isibaar 3 int data;
1059 :     int res;
1060 :     int mv;
1061 :     int scale_fac = 1 << (fcode - 1);
1062 :    
1063 :     data = get_mv_data(bs);
1064 : edgomez 195
1065 :     if (scale_fac == 1 || data == 0)
1066 : Isibaar 3 return data;
1067 :    
1068 :     res = BitstreamGetBits(bs, fcode - 1);
1069 : edgomez 982 mv = ((abs(data) - 1) * scale_fac) + res + 1;
1070 : edgomez 195
1071 : Isibaar 3 return data < 0 ? -mv : mv;
1072 : edgomez 78
1073 : Isibaar 3 }
1074 :    
1075 : edgomez 195 int
1076 :     get_dc_dif(Bitstream * bs,
1077 :     uint32_t dc_size)
1078 : Isibaar 3 {
1079 : edgomez 78
1080 : Isibaar 3 int code = BitstreamGetBits(bs, dc_size);
1081 :     int msb = code >> (dc_size - 1);
1082 :    
1083 : edgomez 195 if (msb == 0)
1084 :     return (-1 * (code ^ ((1 << dc_size) - 1)));
1085 : Isibaar 3
1086 :     return code;
1087 : edgomez 78
1088 : Isibaar 3 }
1089 :    
1090 : edgomez 195 int
1091 :     get_dc_size_lum(Bitstream * bs)
1092 : Isibaar 3 {
1093 : edgomez 78
1094 : Isibaar 3 int code, i;
1095 : edgomez 195
1096 : Isibaar 3 code = BitstreamShowBits(bs, 11);
1097 :    
1098 : edgomez 195 for (i = 11; i > 3; i--) {
1099 :     if (code == 1) {
1100 : Isibaar 3 BitstreamSkip(bs, i);
1101 :     return i + 1;
1102 :     }
1103 :     code >>= 1;
1104 :     }
1105 :    
1106 :     BitstreamSkip(bs, dc_lum_tab[code].len);
1107 :     return dc_lum_tab[code].code;
1108 : edgomez 78
1109 : Isibaar 3 }
1110 :    
1111 :    
1112 : edgomez 195 int
1113 :     get_dc_size_chrom(Bitstream * bs)
1114 : Isibaar 3 {
1115 : edgomez 78
1116 : Isibaar 3 uint32_t code, i;
1117 : edgomez 195
1118 : Isibaar 3 code = BitstreamShowBits(bs, 12);
1119 :    
1120 : edgomez 195 for (i = 12; i > 2; i--) {
1121 :     if (code == 1) {
1122 : Isibaar 3 BitstreamSkip(bs, i);
1123 :     return i;
1124 :     }
1125 :     code >>= 1;
1126 :     }
1127 :    
1128 :     return 3 - BitstreamGetBits(bs, 2);
1129 : edgomez 78
1130 : Isibaar 3 }
1131 :    
1132 : edgomez 453 static __inline int
1133 :     get_coeff(Bitstream * bs,
1134 :     int *run,
1135 :     int *last,
1136 :     int intra,
1137 :     int short_video_header)
1138 :     {
1139 :    
1140 :     uint32_t mode;
1141 :     int32_t level;
1142 : edgomez 764 REVERSE_EVENT *reverse_event;
1143 : edgomez 453
1144 : edgomez 677 if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */
1145 : edgomez 453 intra = 0;
1146 :    
1147 : edgomez 764 if (BitstreamShowBits(bs, 7) != ESCAPE) {
1148 :     reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)];
1149 : edgomez 453
1150 : edgomez 764 if ((level = reverse_event->event.level) == 0)
1151 :     goto error;
1152 : edgomez 453
1153 : edgomez 764 *last = reverse_event->event.last;
1154 :     *run = reverse_event->event.run;
1155 : edgomez 453
1156 : edgomez 764 BitstreamSkip(bs, reverse_event->len);
1157 :    
1158 :     return BitstreamGetBits(bs, 1) ? -level : level;
1159 : edgomez 453 }
1160 :    
1161 : edgomez 764 BitstreamSkip(bs, 7);
1162 :    
1163 : edgomez 453 if (short_video_header) {
1164 : edgomez 677 /* escape mode 4 - H.263 type, only used if short_video_header = 1 */
1165 : edgomez 453 *last = BitstreamGetBit(bs);
1166 :     *run = BitstreamGetBits(bs, 6);
1167 :     level = BitstreamGetBits(bs, 8);
1168 :    
1169 :     if (level == 0 || level == 128)
1170 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d\n", level);
1171 : edgomez 453
1172 : edgomez 764 return (level << 24) >> 24;
1173 : edgomez 453 }
1174 :    
1175 :     mode = BitstreamShowBits(bs, 2);
1176 :    
1177 :     if (mode < 3) {
1178 :     BitstreamSkip(bs, (mode == 2) ? 2 : 1);
1179 :    
1180 : edgomez 764 reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)];
1181 :    
1182 :     if ((level = reverse_event->event.level) == 0)
1183 : edgomez 453 goto error;
1184 :    
1185 : edgomez 764 *last = reverse_event->event.last;
1186 :     *run = reverse_event->event.run;
1187 : edgomez 453
1188 : edgomez 764 BitstreamSkip(bs, reverse_event->len);
1189 : edgomez 453
1190 : edgomez 677 if (mode < 2) /* first escape mode, level is offset */
1191 : edgomez 764 level += max_level[intra][*last][*run];
1192 :     else /* second escape mode, run is offset */
1193 :     *run += max_run[intra][*last][level] + 1;
1194 : edgomez 453
1195 : edgomez 764 return BitstreamGetBits(bs, 1) ? -level : level;
1196 : edgomez 453 }
1197 : edgomez 764
1198 : edgomez 677 /* third escape mode - fixed length codes */
1199 : edgomez 453 BitstreamSkip(bs, 2);
1200 :     *last = BitstreamGetBits(bs, 1);
1201 :     *run = BitstreamGetBits(bs, 6);
1202 : edgomez 677 BitstreamSkip(bs, 1); /* marker */
1203 : edgomez 453 level = BitstreamGetBits(bs, 12);
1204 : edgomez 677 BitstreamSkip(bs, 1); /* marker */
1205 : edgomez 453
1206 : edgomez 764 return (level << 20) >> 20;
1207 : edgomez 453
1208 :     error:
1209 :     *run = VLC_ERROR;
1210 :     return 0;
1211 :     }
1212 :    
1213 : edgomez 195 void
1214 :     get_intra_block(Bitstream * bs,
1215 :     int16_t * block,
1216 :     int direction,
1217 :     int coeff)
1218 : Isibaar 3 {
1219 : edgomez 78
1220 : edgomez 195 const uint16_t *scan = scan_tables[direction];
1221 : edgomez 851 int level, run, last;
1222 : Isibaar 3
1223 : edgomez 195 do {
1224 : Isibaar 3 level = get_coeff(bs, &run, &last, 1, 0);
1225 : edgomez 195 if (run == -1) {
1226 : suxen_drol 1032 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1227 : Isibaar 3 break;
1228 :     }
1229 :     coeff += run;
1230 : edgomez 195 block[scan[coeff]] = level;
1231 : suxen_drol 252
1232 : edgomez 1038 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[coeff], level);
1233 : edgomez 1053 #if 0
1234 :     DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[coeff], level, BitstreamShowBits(bs, 32));
1235 :     #endif
1236 : suxen_drol 252
1237 : suxen_drol 759 if (level < -2047 || level > 2047) {
1238 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR,"warning: intra_overflow %i\n", level);
1239 : Isibaar 3 }
1240 :     coeff++;
1241 :     } while (!last);
1242 : edgomez 78
1243 : Isibaar 3 }
1244 :    
1245 : edgomez 195 void
1246 :     get_inter_block(Bitstream * bs,
1247 : edgomez 851 int16_t * block,
1248 :     int direction)
1249 : Isibaar 3 {
1250 : edgomez 78
1251 : edgomez 851 const uint16_t *scan = scan_tables[direction];
1252 : Isibaar 3 int p;
1253 :     int level;
1254 :     int run;
1255 :     int last;
1256 :    
1257 :     p = 0;
1258 : edgomez 195 do {
1259 : Isibaar 3 level = get_coeff(bs, &run, &last, 0, 0);
1260 : edgomez 195 if (run == -1) {
1261 : suxen_drol 1032 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1262 : Isibaar 3 break;
1263 :     }
1264 :     p += run;
1265 : chenm001 161
1266 : edgomez 195 block[scan[p]] = level;
1267 : suxen_drol 252
1268 : edgomez 1038 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[p], level);
1269 : edgomez 1053 /* DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[p], level, BitstreamShowBits(bs, 32)); */
1270 : suxen_drol 252
1271 : suxen_drol 759 if (level < -2047 || level > 2047) {
1272 : edgomez 1038 DPRINTF(XVID_DEBUG_ERROR,"warning: inter overflow %i\n", level);
1273 : Isibaar 3 }
1274 :     p++;
1275 :     } while (!last);
1276 : edgomez 78
1277 : Isibaar 3 }
1278 : edgomez 861
1279 : chl 995
1280 : edgomez 861 /*****************************************************************************
1281 :     * VLC tables and other constant arrays
1282 :     ****************************************************************************/
1283 :    
1284 :     VLC_TABLE const coeff_tab[2][102] =
1285 :     {
1286 :     /* intra = 0 */
1287 :     {
1288 :     {{ 2, 2}, {0, 0, 1}},
1289 :     {{15, 4}, {0, 0, 2}},
1290 :     {{21, 6}, {0, 0, 3}},
1291 :     {{23, 7}, {0, 0, 4}},
1292 :     {{31, 8}, {0, 0, 5}},
1293 :     {{37, 9}, {0, 0, 6}},
1294 :     {{36, 9}, {0, 0, 7}},
1295 :     {{33, 10}, {0, 0, 8}},
1296 :     {{32, 10}, {0, 0, 9}},
1297 :     {{ 7, 11}, {0, 0, 10}},
1298 :     {{ 6, 11}, {0, 0, 11}},
1299 :     {{32, 11}, {0, 0, 12}},
1300 :     {{ 6, 3}, {0, 1, 1}},
1301 :     {{20, 6}, {0, 1, 2}},
1302 :     {{30, 8}, {0, 1, 3}},
1303 :     {{15, 10}, {0, 1, 4}},
1304 :     {{33, 11}, {0, 1, 5}},
1305 :     {{80, 12}, {0, 1, 6}},
1306 :     {{14, 4}, {0, 2, 1}},
1307 :     {{29, 8}, {0, 2, 2}},
1308 :     {{14, 10}, {0, 2, 3}},
1309 :     {{81, 12}, {0, 2, 4}},
1310 :     {{13, 5}, {0, 3, 1}},
1311 :     {{35, 9}, {0, 3, 2}},
1312 :     {{13, 10}, {0, 3, 3}},
1313 :     {{12, 5}, {0, 4, 1}},
1314 :     {{34, 9}, {0, 4, 2}},
1315 :     {{82, 12}, {0, 4, 3}},
1316 :     {{11, 5}, {0, 5, 1}},
1317 :     {{12, 10}, {0, 5, 2}},
1318 :     {{83, 12}, {0, 5, 3}},
1319 :     {{19, 6}, {0, 6, 1}},
1320 :     {{11, 10}, {0, 6, 2}},
1321 :     {{84, 12}, {0, 6, 3}},
1322 :     {{18, 6}, {0, 7, 1}},
1323 :     {{10, 10}, {0, 7, 2}},
1324 :     {{17, 6}, {0, 8, 1}},
1325 :     {{ 9, 10}, {0, 8, 2}},
1326 :     {{16, 6}, {0, 9, 1}},
1327 :     {{ 8, 10}, {0, 9, 2}},
1328 :     {{22, 7}, {0, 10, 1}},
1329 :     {{85, 12}, {0, 10, 2}},
1330 :     {{21, 7}, {0, 11, 1}},
1331 :     {{20, 7}, {0, 12, 1}},
1332 :     {{28, 8}, {0, 13, 1}},
1333 :     {{27, 8}, {0, 14, 1}},
1334 :     {{33, 9}, {0, 15, 1}},
1335 :     {{32, 9}, {0, 16, 1}},
1336 :     {{31, 9}, {0, 17, 1}},
1337 :     {{30, 9}, {0, 18, 1}},
1338 :     {{29, 9}, {0, 19, 1}},
1339 :     {{28, 9}, {0, 20, 1}},
1340 :     {{27, 9}, {0, 21, 1}},
1341 :     {{26, 9}, {0, 22, 1}},
1342 :     {{34, 11}, {0, 23, 1}},
1343 :     {{35, 11}, {0, 24, 1}},
1344 :     {{86, 12}, {0, 25, 1}},
1345 :     {{87, 12}, {0, 26, 1}},
1346 :     {{ 7, 4}, {1, 0, 1}},
1347 :     {{25, 9}, {1, 0, 2}},
1348 :     {{ 5, 11}, {1, 0, 3}},
1349 :     {{15, 6}, {1, 1, 1}},
1350 :     {{ 4, 11}, {1, 1, 2}},
1351 :     {{14, 6}, {1, 2, 1}},
1352 :     {{13, 6}, {1, 3, 1}},
1353 :     {{12, 6}, {1, 4, 1}},
1354 :     {{19, 7}, {1, 5, 1}},
1355 :     {{18, 7}, {1, 6, 1}},
1356 :     {{17, 7}, {1, 7, 1}},
1357 :     {{16, 7}, {1, 8, 1}},
1358 :     {{26, 8}, {1, 9, 1}},
1359 :     {{25, 8}, {1, 10, 1}},
1360 :     {{24, 8}, {1, 11, 1}},
1361 :     {{23, 8}, {1, 12, 1}},
1362 :     {{22, 8}, {1, 13, 1}},
1363 :     {{21, 8}, {1, 14, 1}},
1364 :     {{20, 8}, {1, 15, 1}},
1365 :     {{19, 8}, {1, 16, 1}},
1366 :     {{24, 9}, {1, 17, 1}},
1367 :     {{23, 9}, {1, 18, 1}},
1368 :     {{22, 9}, {1, 19, 1}},
1369 :     {{21, 9}, {1, 20, 1}},
1370 :     {{20, 9}, {1, 21, 1}},
1371 :     {{19, 9}, {1, 22, 1}},
1372 :     {{18, 9}, {1, 23, 1}},
1373 :     {{17, 9}, {1, 24, 1}},
1374 :     {{ 7, 10}, {1, 25, 1}},
1375 :     {{ 6, 10}, {1, 26, 1}},
1376 :     {{ 5, 10}, {1, 27, 1}},
1377 :     {{ 4, 10}, {1, 28, 1}},
1378 :     {{36, 11}, {1, 29, 1}},
1379 :     {{37, 11}, {1, 30, 1}},
1380 :     {{38, 11}, {1, 31, 1}},
1381 :     {{39, 11}, {1, 32, 1}},
1382 :     {{88, 12}, {1, 33, 1}},
1383 :     {{89, 12}, {1, 34, 1}},
1384 :     {{90, 12}, {1, 35, 1}},
1385 :     {{91, 12}, {1, 36, 1}},
1386 :     {{92, 12}, {1, 37, 1}},
1387 :     {{93, 12}, {1, 38, 1}},
1388 :     {{94, 12}, {1, 39, 1}},
1389 :     {{95, 12}, {1, 40, 1}}
1390 :     },
1391 :     /* intra = 1 */
1392 :     {
1393 :     {{ 2, 2}, {0, 0, 1}},
1394 :     {{15, 4}, {0, 0, 3}},
1395 :     {{21, 6}, {0, 0, 6}},
1396 :     {{23, 7}, {0, 0, 9}},
1397 :     {{31, 8}, {0, 0, 10}},
1398 :     {{37, 9}, {0, 0, 13}},
1399 :     {{36, 9}, {0, 0, 14}},
1400 :     {{33, 10}, {0, 0, 17}},
1401 :     {{32, 10}, {0, 0, 18}},
1402 :     {{ 7, 11}, {0, 0, 21}},
1403 :     {{ 6, 11}, {0, 0, 22}},
1404 :     {{32, 11}, {0, 0, 23}},
1405 :     {{ 6, 3}, {0, 0, 2}},
1406 :     {{20, 6}, {0, 1, 2}},
1407 :     {{30, 8}, {0, 0, 11}},
1408 :     {{15, 10}, {0, 0, 19}},
1409 :     {{33, 11}, {0, 0, 24}},
1410 :     {{80, 12}, {0, 0, 25}},
1411 :     {{14, 4}, {0, 1, 1}},
1412 :     {{29, 8}, {0, 0, 12}},
1413 :     {{14, 10}, {0, 0, 20}},
1414 :     {{81, 12}, {0, 0, 26}},
1415 :     {{13, 5}, {0, 0, 4}},
1416 :     {{35, 9}, {0, 0, 15}},
1417 :     {{13, 10}, {0, 1, 7}},
1418 :     {{12, 5}, {0, 0, 5}},
1419 :     {{34, 9}, {0, 4, 2}},
1420 :     {{82, 12}, {0, 0, 27}},
1421 :     {{11, 5}, {0, 2, 1}},
1422 :     {{12, 10}, {0, 2, 4}},
1423 :     {{83, 12}, {0, 1, 9}},
1424 :     {{19, 6}, {0, 0, 7}},
1425 :     {{11, 10}, {0, 3, 4}},
1426 :     {{84, 12}, {0, 6, 3}},
1427 :     {{18, 6}, {0, 0, 8}},
1428 :     {{10, 10}, {0, 4, 3}},
1429 :     {{17, 6}, {0, 3, 1}},
1430 :     {{ 9, 10}, {0, 8, 2}},
1431 :     {{16, 6}, {0, 4, 1}},
1432 :     {{ 8, 10}, {0, 5, 3}},
1433 :     {{22, 7}, {0, 1, 3}},
1434 :     {{85, 12}, {0, 1, 10}},
1435 :     {{21, 7}, {0, 2, 2}},
1436 :     {{20, 7}, {0, 7, 1}},
1437 :     {{28, 8}, {0, 1, 4}},
1438 :     {{27, 8}, {0, 3, 2}},
1439 :     {{33, 9}, {0, 0, 16}},
1440 :     {{32, 9}, {0, 1, 5}},
1441 :     {{31, 9}, {0, 1, 6}},
1442 :     {{30, 9}, {0, 2, 3}},
1443 :     {{29, 9}, {0, 3, 3}},
1444 :     {{28, 9}, {0, 5, 2}},
1445 :     {{27, 9}, {0, 6, 2}},
1446 :     {{26, 9}, {0, 7, 2}},
1447 :     {{34, 11}, {0, 1, 8}},
1448 :     {{35, 11}, {0, 9, 2}},
1449 :     {{86, 12}, {0, 2, 5}},
1450 :     {{87, 12}, {0, 7, 3}},
1451 :     {{ 7, 4}, {1, 0, 1}},
1452 :     {{25, 9}, {0, 11, 1}},
1453 :     {{ 5, 11}, {1, 0, 6}},
1454 :     {{15, 6}, {1, 1, 1}},
1455 :     {{ 4, 11}, {1, 0, 7}},
1456 :     {{14, 6}, {1, 2, 1}},
1457 :     {{13, 6}, {0, 5, 1}},
1458 :     {{12, 6}, {1, 0, 2}},
1459 :     {{19, 7}, {1, 5, 1}},
1460 :     {{18, 7}, {0, 6, 1}},
1461 :     {{17, 7}, {1, 3, 1}},
1462 :     {{16, 7}, {1, 4, 1}},
1463 :     {{26, 8}, {1, 9, 1}},
1464 :     {{25, 8}, {0, 8, 1}},
1465 :     {{24, 8}, {0, 9, 1}},
1466 :     {{23, 8}, {0, 10, 1}},
1467 :     {{22, 8}, {1, 0, 3}},
1468 :     {{21, 8}, {1, 6, 1}},
1469 :     {{20, 8}, {1, 7, 1}},
1470 :     {{19, 8}, {1, 8, 1}},
1471 :     {{24, 9}, {0, 12, 1}},
1472 :     {{23, 9}, {1, 0, 4}},
1473 :     {{22, 9}, {1, 1, 2}},
1474 :     {{21, 9}, {1, 10, 1}},
1475 :     {{20, 9}, {1, 11, 1}},
1476 :     {{19, 9}, {1, 12, 1}},
1477 :     {{18, 9}, {1, 13, 1}},
1478 :     {{17, 9}, {1, 14, 1}},
1479 :     {{ 7, 10}, {0, 13, 1}},
1480 :     {{ 6, 10}, {1, 0, 5}},
1481 :     {{ 5, 10}, {1, 1, 3}},
1482 :     {{ 4, 10}, {1, 2, 2}},
1483 :     {{36, 11}, {1, 3, 2}},
1484 :     {{37, 11}, {1, 4, 2}},
1485 :     {{38, 11}, {1, 15, 1}},
1486 :     {{39, 11}, {1, 16, 1}},
1487 :     {{88, 12}, {0, 14, 1}},
1488 :     {{89, 12}, {1, 0, 8}},
1489 :     {{90, 12}, {1, 5, 2}},
1490 :     {{91, 12}, {1, 6, 2}},
1491 :     {{92, 12}, {1, 17, 1}},
1492 :     {{93, 12}, {1, 18, 1}},
1493 :     {{94, 12}, {1, 19, 1}},
1494 :     {{95, 12}, {1, 20, 1}}
1495 :     }
1496 :     };
1497 :    
1498 :     /* constants taken from momusys/vm_common/inlcude/max_level.h */
1499 :     uint8_t const max_level[2][2][64] = {
1500 :     {
1501 :     /* intra = 0, last = 0 */
1502 :     {
1503 :     12, 6, 4, 3, 3, 3, 3, 2,
1504 :     2, 2, 2, 1, 1, 1, 1, 1,
1505 :     1, 1, 1, 1, 1, 1, 1, 1,
1506 :     1, 1, 1, 0, 0, 0, 0, 0,
1507 :     0, 0, 0, 0, 0, 0, 0, 0,
1508 :     0, 0, 0, 0, 0, 0, 0, 0,
1509 :     0, 0, 0, 0, 0, 0, 0, 0,
1510 :     0, 0, 0, 0, 0, 0, 0, 0
1511 :     },
1512 :     /* intra = 0, last = 1 */
1513 :     {
1514 :     3, 2, 1, 1, 1, 1, 1, 1,
1515 :     1, 1, 1, 1, 1, 1, 1, 1,
1516 :     1, 1, 1, 1, 1, 1, 1, 1,
1517 :     1, 1, 1, 1, 1, 1, 1, 1,
1518 :     1, 1, 1, 1, 1, 1, 1, 1,
1519 :     1, 0, 0, 0, 0, 0, 0, 0,
1520 :     0, 0, 0, 0, 0, 0, 0, 0,
1521 :     0, 0, 0, 0, 0, 0, 0, 0
1522 :     }
1523 :     },
1524 :     {
1525 :     /* intra = 1, last = 0 */
1526 :     {
1527 :     27, 10, 5, 4, 3, 3, 3, 3,
1528 :     2, 2, 1, 1, 1, 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 :     },
1536 :     /* intra = 1, last = 1 */
1537 :     {
1538 :     8, 3, 2, 2, 2, 2, 2, 1,
1539 :     1, 1, 1, 1, 1, 1, 1, 1,
1540 :     1, 1, 1, 1, 1, 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 :     }
1547 :     }
1548 :     };
1549 :    
1550 :     uint8_t const max_run[2][2][64] = {
1551 :     {
1552 :     /* intra = 0, last = 0 */
1553 :     {
1554 :     0, 26, 10, 6, 2, 1, 1, 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 :     0, 0, 0, 0, 0, 0, 0, 0,
1561 :     0, 0, 0, 0, 0, 0, 0, 0,
1562 :     },
1563 :     /* intra = 0, last = 1 */
1564 :     {
1565 :     0, 40, 1, 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 :     0, 0, 0, 0, 0, 0, 0, 0,
1572 :     0, 0, 0, 0, 0, 0, 0, 0,
1573 :     }
1574 :     },
1575 :     {
1576 :     /* intra = 1, last = 0 */
1577 :     {
1578 :     0, 14, 9, 7, 3, 2, 1, 1,
1579 :     1, 1, 1, 0, 0, 0, 0, 0,
1580 :     0, 0, 0, 0, 0, 0, 0, 0,
1581 :     0, 0, 0, 0, 0, 0, 0, 0,
1582 :     0, 0, 0, 0, 0, 0, 0, 0,
1583 :     0, 0, 0, 0, 0, 0, 0, 0,
1584 :     0, 0, 0, 0, 0, 0, 0, 0,
1585 :     0, 0, 0, 0, 0, 0, 0, 0,
1586 :     },
1587 :     /* intra = 1, last = 1 */
1588 :     {
1589 :     0, 20, 6, 1, 0, 0, 0, 0,
1590 :     0, 0, 0, 0, 0, 0, 0, 0,
1591 :     0, 0, 0, 0, 0, 0, 0, 0,
1592 :     0, 0, 0, 0, 0, 0, 0, 0,
1593 :     0, 0, 0, 0, 0, 0, 0, 0,
1594 :     0, 0, 0, 0, 0, 0, 0, 0,
1595 :     0, 0, 0, 0, 0, 0, 0, 0,
1596 :     0, 0, 0, 0, 0, 0, 0, 0,
1597 :     }
1598 :     }
1599 :     };
1600 :    
1601 :     /******************************************************************
1602 :     * encoder tables *
1603 :     ******************************************************************/
1604 :    
1605 :     VLC sprite_trajectory_code[32768];
1606 :    
1607 :     VLC sprite_trajectory_len[15] = {
1608 :     { 0x00 , 2},
1609 :     { 0x02 , 3}, { 0x03, 3}, { 0x04, 3}, { 0x05, 3}, { 0x06, 3},
1610 :     { 0x0E , 4}, { 0x1E, 5}, { 0x3E, 6}, { 0x7F, 7}, { 0xFE, 8},
1611 :     { 0x1FE, 9}, {0x3FE,10}, {0x7FE,11}, {0xFFE,12} };
1612 :    
1613 :    
1614 :     /* DCT coefficients. Four tables, two for last = 0, two for last = 1.
1615 :     the sign bit must be added afterwards. */
1616 :    
1617 :     /* MCBPC Indexing by cbpc in first two bits, mode in last two.
1618 :     CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10.
1619 :     Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */
1620 :    
1621 :     VLC mcbpc_intra_tab[15] = {
1622 :     {0x01, 9}, {0x01, 1}, {0x01, 4}, {0x00, 0},
1623 :     {0x00, 0}, {0x01, 3}, {0x01, 6}, {0x00, 0},
1624 :     {0x00, 0}, {0x02, 3}, {0x02, 6}, {0x00, 0},
1625 :     {0x00, 0}, {0x03, 3}, {0x03, 6}
1626 :     };
1627 :    
1628 :     /* MCBPC inter.
1629 :     Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */
1630 :    
1631 :     VLC mcbpc_inter_tab[29] = {
1632 :     {1, 1}, {3, 3}, {2, 3}, {3, 5}, {4, 6}, {1, 9}, {0, 0}, {0, 0},
1633 :     {3, 4}, {7, 7}, {5, 7}, {4, 8}, {4, 9}, {0, 0}, {0, 0}, {0, 0},
1634 :     {2, 4}, {6, 7}, {4, 7}, {3, 8}, {3, 9}, {0, 0}, {0, 0}, {0, 0},
1635 :     {5, 6}, {5, 9}, {5, 8}, {3, 7}, {2, 9}
1636 :     };
1637 :    
1638 : edgomez 958 const VLC xvid_cbpy_tab[16] = {
1639 : edgomez 861 {3, 4}, {5, 5}, {4, 5}, {9, 4}, {3, 5}, {7, 4}, {2, 6}, {11, 4},
1640 :     {2, 5}, {3, 6}, {5, 4}, {10, 4}, {4, 4}, {8, 4}, {6, 4}, {3, 2}
1641 :     };
1642 :    
1643 :     const VLC dcy_tab[511] = {
1644 :     {0x100, 15}, {0x101, 15}, {0x102, 15}, {0x103, 15},
1645 :     {0x104, 15}, {0x105, 15}, {0x106, 15}, {0x107, 15},
1646 :     {0x108, 15}, {0x109, 15}, {0x10a, 15}, {0x10b, 15},
1647 :     {0x10c, 15}, {0x10d, 15}, {0x10e, 15}, {0x10f, 15},
1648 :     {0x110, 15}, {0x111, 15}, {0x112, 15}, {0x113, 15},
1649 :     {0x114, 15}, {0x115, 15}, {0x116, 15}, {0x117, 15},
1650 :     {0x118, 15}, {0x119, 15}, {0x11a, 15}, {0x11b, 15},
1651 :     {0x11c, 15}, {0x11d, 15}, {0x11e, 15}, {0x11f, 15},
1652 :     {0x120, 15}, {0x121, 15}, {0x122, 15}, {0x123, 15},
1653 :     {0x124, 15}, {0x125, 15}, {0x126, 15}, {0x127, 15},
1654 :     {0x128, 15}, {0x129, 15}, {0x12a, 15}, {0x12b, 15},
1655 :     {0x12c, 15}, {0x12d, 15}, {0x12e, 15}, {0x12f, 15},
1656 :     {0x130, 15}, {0x131, 15}, {0x132, 15}, {0x133, 15},
1657 :     {0x134, 15}, {0x135, 15}, {0x136, 15}, {0x137, 15},
1658 :     {0x138, 15}, {0x139, 15}, {0x13a, 15}, {0x13b, 15},
1659 :     {0x13c, 15}, {0x13d, 15}, {0x13e, 15}, {0x13f, 15},
1660 :     {0x140, 15}, {0x141, 15}, {0x142, 15}, {0x143, 15},
1661 :     {0x144, 15}, {0x145, 15}, {0x146, 15}, {0x147, 15},
1662 :     {0x148, 15}, {0x149, 15}, {0x14a, 15}, {0x14b, 15},
1663 :     {0x14c, 15}, {0x14d, 15}, {0x14e, 15}, {0x14f, 15},
1664 :     {0x150, 15}, {0x151, 15}, {0x152, 15}, {0x153, 15},
1665 :     {0x154, 15}, {0x155, 15}, {0x156, 15}, {0x157, 15},
1666 :     {0x158, 15}, {0x159, 15}, {0x15a, 15}, {0x15b, 15},
1667 :     {0x15c, 15}, {0x15d, 15}, {0x15e, 15}, {0x15f, 15},
1668 :     {0x160, 15}, {0x161, 15}, {0x162, 15}, {0x163, 15},
1669 :     {0x164, 15}, {0x165, 15}, {0x166, 15}, {0x167, 15},
1670 :     {0x168, 15}, {0x169, 15}, {0x16a, 15}, {0x16b, 15},
1671 :     {0x16c, 15}, {0x16d, 15}, {0x16e, 15}, {0x16f, 15},
1672 :     {0x170, 15}, {0x171, 15}, {0x172, 15}, {0x173, 15},
1673 :     {0x174, 15}, {0x175, 15}, {0x176, 15}, {0x177, 15},
1674 :     {0x178, 15}, {0x179, 15}, {0x17a, 15}, {0x17b, 15},
1675 :     {0x17c, 15}, {0x17d, 15}, {0x17e, 15}, {0x17f, 15},
1676 :     {0x80, 13}, {0x81, 13}, {0x82, 13}, {0x83, 13},
1677 :     {0x84, 13}, {0x85, 13}, {0x86, 13}, {0x87, 13},
1678 :     {0x88, 13}, {0x89, 13}, {0x8a, 13}, {0x8b, 13},
1679 :     {0x8c, 13}, {0x8d, 13}, {0x8e, 13}, {0x8f, 13},
1680 :     {0x90, 13}, {0x91, 13}, {0x92, 13}, {0x93, 13},
1681 :     {0x94, 13}, {0x95, 13}, {0x96, 13}, {0x97, 13},
1682 :     {0x98, 13}, {0x99, 13}, {0x9a, 13}, {0x9b, 13},
1683 :     {0x9c, 13}, {0x9d, 13}, {0x9e, 13}, {0x9f, 13},
1684 :     {0xa0, 13}, {0xa1, 13}, {0xa2, 13}, {0xa3, 13},
1685 :     {0xa4, 13}, {0xa5, 13}, {0xa6, 13}, {0xa7, 13},
1686 :     {0xa8, 13}, {0xa9, 13}, {0xaa, 13}, {0xab, 13},
1687 :     {0xac, 13}, {0xad, 13}, {0xae, 13}, {0xaf, 13},
1688 :     {0xb0, 13}, {0xb1, 13}, {0xb2, 13}, {0xb3, 13},
1689 :     {0xb4, 13}, {0xb5, 13}, {0xb6, 13}, {0xb7, 13},
1690 :     {0xb8, 13}, {0xb9, 13}, {0xba, 13}, {0xbb, 13},
1691 :     {0xbc, 13}, {0xbd, 13}, {0xbe, 13}, {0xbf, 13},
1692 :     {0x40, 11}, {0x41, 11}, {0x42, 11}, {0x43, 11},
1693 :     {0x44, 11}, {0x45, 11}, {0x46, 11}, {0x47, 11},
1694 :     {0x48, 11}, {0x49, 11}, {0x4a, 11}, {0x4b, 11},
1695 :     {0x4c, 11}, {0x4d, 11}, {0x4e, 11}, {0x4f, 11},
1696 :     {0x50, 11}, {0x51, 11}, {0x52, 11}, {0x53, 11},
1697 :     {0x54, 11}, {0x55, 11}, {0x56, 11}, {0x57, 11},
1698 :     {0x58, 11}, {0x59, 11}, {0x5a, 11}, {0x5b, 11},
1699 :     {0x5c, 11}, {0x5d, 11}, {0x5e, 11}, {0x5f, 11},
1700 :     {0x20, 9}, {0x21, 9}, {0x22, 9}, {0x23, 9},
1701 :     {0x24, 9}, {0x25, 9}, {0x26, 9}, {0x27, 9},
1702 :     {0x28, 9}, {0x29, 9}, {0x2a, 9}, {0x2b, 9},
1703 :     {0x2c, 9}, {0x2d, 9}, {0x2e, 9}, {0x2f, 9},
1704 :     {0x10, 7}, {0x11, 7}, {0x12, 7}, {0x13, 7},
1705 :     {0x14, 7}, {0x15, 7}, {0x16, 7}, {0x17, 7},
1706 :     {0x10, 6}, {0x11, 6}, {0x12, 6}, {0x13, 6},
1707 :     {0x08, 4}, {0x09, 4}, {0x06, 3}, {0x03, 3},
1708 :     {0x07, 3}, {0x0a, 4}, {0x0b, 4}, {0x14, 6},
1709 :     {0x15, 6}, {0x16, 6}, {0x17, 6}, {0x18, 7},
1710 :     {0x19, 7}, {0x1a, 7}, {0x1b, 7}, {0x1c, 7},
1711 :     {0x1d, 7}, {0x1e, 7}, {0x1f, 7}, {0x30, 9},
1712 :     {0x31, 9}, {0x32, 9}, {0x33, 9}, {0x34, 9},
1713 :     {0x35, 9}, {0x36, 9}, {0x37, 9}, {0x38, 9},
1714 :     {0x39, 9}, {0x3a, 9}, {0x3b, 9}, {0x3c, 9},
1715 :     {0x3d, 9}, {0x3e, 9}, {0x3f, 9}, {0x60, 11},
1716 :     {0x61, 11}, {0x62, 11}, {0x63, 11}, {0x64, 11},
1717 :     {0x65, 11}, {0x66, 11}, {0x67, 11}, {0x68, 11},
1718 :     {0x69, 11}, {0x6a, 11}, {0x6b, 11}, {0x6c, 11},
1719 :     {0x6d, 11}, {0x6e, 11}, {0x6f, 11}, {0x70, 11},
1720 :     {0x71, 11}, {0x72, 11}, {0x73, 11}, {0x74, 11},
1721 :     {0x75, 11}, {0x76, 11}, {0x77, 11}, {0x78, 11},
1722 :     {0x79, 11}, {0x7a, 11}, {0x7b, 11}, {0x7c, 11},
1723 :     {0x7d, 11}, {0x7e, 11}, {0x7f, 11}, {0xc0, 13},
1724 :     {0xc1, 13}, {0xc2, 13}, {0xc3, 13}, {0xc4, 13},
1725 :     {0xc5, 13}, {0xc6, 13}, {0xc7, 13}, {0xc8, 13},
1726 :     {0xc9, 13}, {0xca, 13}, {0xcb, 13}, {0xcc, 13},
1727 :     {0xcd, 13}, {0xce, 13}, {0xcf, 13}, {0xd0, 13},
1728 :     {0xd1, 13}, {0xd2, 13}, {0xd3, 13}, {0xd4, 13},
1729 :     {0xd5, 13}, {0xd6, 13}, {0xd7, 13}, {0xd8, 13},
1730 :     {0xd9, 13}, {0xda, 13}, {0xdb, 13}, {0xdc, 13},
1731 :     {0xdd, 13}, {0xde, 13}, {0xdf, 13}, {0xe0, 13},
1732 :     {0xe1, 13}, {0xe2, 13}, {0xe3, 13}, {0xe4, 13},
1733 :     {0xe5, 13}, {0xe6, 13}, {0xe7, 13}, {0xe8, 13},
1734 :     {0xe9, 13}, {0xea, 13}, {0xeb, 13}, {0xec, 13},
1735 :     {0xed, 13}, {0xee, 13}, {0xef, 13}, {0xf0, 13},
1736 :     {0xf1, 13}, {0xf2, 13}, {0xf3, 13}, {0xf4, 13},
1737 :     {0xf5, 13}, {0xf6, 13}, {0xf7, 13}, {0xf8, 13},
1738 :     {0xf9, 13}, {0xfa, 13}, {0xfb, 13}, {0xfc, 13},
1739 :     {0xfd, 13}, {0xfe, 13}, {0xff, 13}, {0x180, 15},
1740 :     {0x181, 15}, {0x182, 15}, {0x183, 15}, {0x184, 15},
1741 :     {0x185, 15}, {0x186, 15}, {0x187, 15}, {0x188, 15},
1742 :     {0x189, 15}, {0x18a, 15}, {0x18b, 15}, {0x18c, 15},
1743 :     {0x18d, 15}, {0x18e, 15}, {0x18f, 15}, {0x190, 15},
1744 :     {0x191, 15}, {0x192, 15}, {0x193, 15}, {0x194, 15},
1745 :     {0x195, 15}, {0x196, 15}, {0x197, 15}, {0x198, 15},
1746 :     {0x199, 15}, {0x19a, 15}, {0x19b, 15}, {0x19c, 15},
1747 :     {0x19d, 15}, {0x19e, 15}, {0x19f, 15}, {0x1a0, 15},
1748 :     {0x1a1, 15}, {0x1a2, 15}, {0x1a3, 15}, {0x1a4, 15},
1749 :     {0x1a5, 15}, {0x1a6, 15}, {0x1a7, 15}, {0x1a8, 15},
1750 :     {0x1a9, 15}, {0x1aa, 15}, {0x1ab, 15}, {0x1ac, 15},
1751 :     {0x1ad, 15}, {0x1ae, 15}, {0x1af, 15}, {0x1b0, 15},
1752 :     {0x1b1, 15}, {0x1b2, 15}, {0x1b3, 15}, {0x1b4, 15},
1753 :     {0x1b5, 15}, {0x1b6, 15}, {0x1b7, 15}, {0x1b8, 15},
1754 :     {0x1b9, 15}, {0x1ba, 15}, {0x1bb, 15}, {0x1bc, 15},
1755 :     {0x1bd, 15}, {0x1be, 15}, {0x1bf, 15}, {0x1c0, 15},
1756 :     {0x1c1, 15}, {0x1c2, 15}, {0x1c3, 15}, {0x1c4, 15},
1757 :     {0x1c5, 15}, {0x1c6, 15}, {0x1c7, 15}, {0x1c8, 15},
1758 :     {0x1c9, 15}, {0x1ca, 15}, {0x1cb, 15}, {0x1cc, 15},
1759 :     {0x1cd, 15}, {0x1ce, 15}, {0x1cf, 15}, {0x1d0, 15},
1760 :     {0x1d1, 15}, {0x1d2, 15}, {0x1d3, 15}, {0x1d4, 15},
1761 :     {0x1d5, 15}, {0x1d6, 15}, {0x1d7, 15}, {0x1d8, 15},
1762 :     {0x1d9, 15}, {0x1da, 15}, {0x1db, 15}, {0x1dc, 15},
1763 :     {0x1dd, 15}, {0x1de, 15}, {0x1df, 15}, {0x1e0, 15},
1764 :     {0x1e1, 15}, {0x1e2, 15}, {0x1e3, 15}, {0x1e4, 15},
1765 :     {0x1e5, 15}, {0x1e6, 15}, {0x1e7, 15}, {0x1e8, 15},
1766 :     {0x1e9, 15}, {0x1ea, 15}, {0x1eb, 15}, {0x1ec, 15},
1767 :     {0x1ed, 15}, {0x1ee, 15}, {0x1ef, 15}, {0x1f0, 15},
1768 :     {0x1f1, 15}, {0x1f2, 15}, {0x1f3, 15}, {0x1f4, 15},
1769 :     {0x1f5, 15}, {0x1f6, 15}, {0x1f7, 15}, {0x1f8, 15},
1770 :     {0x1f9, 15}, {0x1fa, 15}, {0x1fb, 15}, {0x1fc, 15},
1771 :     {0x1fd, 15}, {0x1fe, 15}, {0x1ff, 15},
1772 :     };
1773 :    
1774 :     const VLC dcc_tab[511] = {
1775 :     {0x100, 16}, {0x101, 16}, {0x102, 16}, {0x103, 16},
1776 :     {0x104, 16}, {0x105, 16}, {0x106, 16}, {0x107, 16},
1777 :     {0x108, 16}, {0x109, 16}, {0x10a, 16}, {0x10b, 16},
1778 :     {0x10c, 16}, {0x10d, 16}, {0x10e, 16}, {0x10f, 16},
1779 :     {0x110, 16}, {0x111, 16}, {0x112, 16}, {0x113, 16},
1780 :     {0x114, 16}, {0x115, 16}, {0x116, 16}, {0x117, 16},
1781 :     {0x118, 16}, {0x119, 16}, {0x11a, 16}, {0x11b, 16},
1782 :     {0x11c, 16}, {0x11d, 16}, {0x11e, 16}, {0x11f, 16},
1783 :     {0x120, 16}, {0x121, 16}, {0x122, 16}, {0x123, 16},
1784 :     {0x124, 16}, {0x125, 16}, {0x126, 16}, {0x127, 16},
1785 :     {0x128, 16}, {0x129, 16}, {0x12a, 16}, {0x12b, 16},
1786 :     {0x12c, 16}, {0x12d, 16}, {0x12e, 16}, {0x12f, 16},
1787 :     {0x130, 16}, {0x131, 16}, {0x132, 16}, {0x133, 16},
1788 :     {0x134, 16}, {0x135, 16}, {0x136, 16}, {0x137, 16},
1789 :     {0x138, 16}, {0x139, 16}, {0x13a, 16}, {0x13b, 16},
1790 :     {0x13c, 16}, {0x13d, 16}, {0x13e, 16}, {0x13f, 16},
1791 :     {0x140, 16}, {0x141, 16}, {0x142, 16}, {0x143, 16},
1792 :     {0x144, 16}, {0x145, 16}, {0x146, 16}, {0x147, 16},
1793 :     {0x148, 16}, {0x149, 16}, {0x14a, 16}, {0x14b, 16},
1794 :     {0x14c, 16}, {0x14d, 16}, {0x14e, 16}, {0x14f, 16},
1795 :     {0x150, 16}, {0x151, 16}, {0x152, 16}, {0x153, 16},
1796 :     {0x154, 16}, {0x155, 16}, {0x156, 16}, {0x157, 16},
1797 :     {0x158, 16}, {0x159, 16}, {0x15a, 16}, {0x15b, 16},
1798 :     {0x15c, 16}, {0x15d, 16}, {0x15e, 16}, {0x15f, 16},
1799 :     {0x160, 16}, {0x161, 16}, {0x162, 16}, {0x163, 16},
1800 :     {0x164, 16}, {0x165, 16}, {0x166, 16}, {0x167, 16},
1801 :     {0x168, 16}, {0x169, 16}, {0x16a, 16}, {0x16b, 16},
1802 :     {0x16c, 16}, {0x16d, 16}, {0x16e, 16}, {0x16f, 16},
1803 :     {0x170, 16}, {0x171, 16}, {0x172, 16}, {0x173, 16},
1804 :     {0x174, 16}, {0x175, 16}, {0x176, 16}, {0x177, 16},
1805 :     {0x178, 16}, {0x179, 16}, {0x17a, 16}, {0x17b, 16},
1806 :     {0x17c, 16}, {0x17d, 16}, {0x17e, 16}, {0x17f, 16},
1807 :     {0x80, 14}, {0x81, 14}, {0x82, 14}, {0x83, 14},
1808 :     {0x84, 14}, {0x85, 14}, {0x86, 14}, {0x87, 14},
1809 :     {0x88, 14}, {0x89, 14}, {0x8a, 14}, {0x8b, 14},
1810 :     {0x8c, 14}, {0x8d, 14}, {0x8e, 14}, {0x8f, 14},
1811 :     {0x90, 14}, {0x91, 14}, {0x92, 14}, {0x93, 14},
1812 :     {0x94, 14}, {0x95, 14}, {0x96, 14}, {0x97, 14},
1813 :     {0x98, 14}, {0x99, 14}, {0x9a, 14}, {0x9b, 14},
1814 :     {0x9c, 14}, {0x9d, 14}, {0x9e, 14}, {0x9f, 14},
1815 :     {0xa0, 14}, {0xa1, 14}, {0xa2, 14}, {0xa3, 14},
1816 :     {0xa4, 14}, {0xa5, 14}, {0xa6, 14}, {0xa7, 14},
1817 :     {0xa8, 14}, {0xa9, 14}, {0xaa, 14}, {0xab, 14},
1818 :     {0xac, 14}, {0xad, 14}, {0xae, 14}, {0xaf, 14},
1819 :     {0xb0, 14}, {0xb1, 14}, {0xb2, 14}, {0xb3, 14},
1820 :     {0xb4, 14}, {0xb5, 14}, {0xb6, 14}, {0xb7, 14},
1821 :     {0xb8, 14}, {0xb9, 14}, {0xba, 14}, {0xbb, 14},
1822 :     {0xbc, 14}, {0xbd, 14}, {0xbe, 14}, {0xbf, 14},
1823 :     {0x40, 12}, {0x41, 12}, {0x42, 12}, {0x43, 12},
1824 :     {0x44, 12}, {0x45, 12}, {0x46, 12}, {0x47, 12},
1825 :     {0x48, 12}, {0x49, 12}, {0x4a, 12}, {0x4b, 12},
1826 :     {0x4c, 12}, {0x4d, 12}, {0x4e, 12}, {0x4f, 12},
1827 :     {0x50, 12}, {0x51, 12}, {0x52, 12}, {0x53, 12},
1828 :     {0x54, 12}, {0x55, 12}, {0x56, 12}, {0x57, 12},
1829 :     {0x58, 12}, {0x59, 12}, {0x5a, 12}, {0x5b, 12},
1830 :     {0x5c, 12}, {0x5d, 12}, {0x5e, 12}, {0x5f, 12},
1831 :     {0x20, 10}, {0x21, 10}, {0x22, 10}, {0x23, 10},
1832 :     {0x24, 10}, {0x25, 10}, {0x26, 10}, {0x27, 10},
1833 :     {0x28, 10}, {0x29, 10}, {0x2a, 10}, {0x2b, 10},
1834 :     {0x2c, 10}, {0x2d, 10}, {0x2e, 10}, {0x2f, 10},
1835 :     {0x10, 8}, {0x11, 8}, {0x12, 8}, {0x13, 8},
1836 :     {0x14, 8}, {0x15, 8}, {0x16, 8}, {0x17, 8},
1837 :     {0x08, 6}, {0x09, 6}, {0x0a, 6}, {0x0b, 6},
1838 :     {0x04, 4}, {0x05, 4}, {0x04, 3}, {0x03, 2},
1839 :     {0x05, 3}, {0x06, 4}, {0x07, 4}, {0x0c, 6},
1840 :     {0x0d, 6}, {0x0e, 6}, {0x0f, 6}, {0x18, 8},
1841 :     {0x19, 8}, {0x1a, 8}, {0x1b, 8}, {0x1c, 8},
1842 :     {0x1d, 8}, {0x1e, 8}, {0x1f, 8}, {0x30, 10},
1843 :     {0x31, 10}, {0x32, 10}, {0x33, 10}, {0x34, 10},
1844 :     {0x35, 10}, {0x36, 10}, {0x37, 10}, {0x38, 10},
1845 :     {0x39, 10}, {0x3a, 10}, {0x3b, 10}, {0x3c, 10},
1846 :     {0x3d, 10}, {0x3e, 10}, {0x3f, 10}, {0x60, 12},
1847 :     {0x61, 12}, {0x62, 12}, {0x63, 12}, {0x64, 12},
1848 :     {0x65, 12}, {0x66, 12}, {0x67, 12}, {0x68, 12},
1849 :     {0x69, 12}, {0x6a, 12}, {0x6b, 12}, {0x6c, 12},
1850 :     {0x6d, 12}, {0x6e, 12}, {0x6f, 12}, {0x70, 12},
1851 :     {0x71, 12}, {0x72, 12}, {0x73, 12}, {0x74, 12},
1852 :     {0x75, 12}, {0x76, 12}, {0x77, 12}, {0x78, 12},
1853 :     {0x79, 12}, {0x7a, 12}, {0x7b, 12}, {0x7c, 12},
1854 :     {0x7d, 12}, {0x7e, 12}, {0x7f, 12}, {0xc0, 14},
1855 :     {0xc1, 14}, {0xc2, 14}, {0xc3, 14}, {0xc4, 14},
1856 :     {0xc5, 14}, {0xc6, 14}, {0xc7, 14}, {0xc8, 14},
1857 :     {0xc9, 14}, {0xca, 14}, {0xcb, 14}, {0xcc, 14},
1858 :     {0xcd, 14}, {0xce, 14}, {0xcf, 14}, {0xd0, 14},
1859 :     {0xd1, 14}, {0xd2, 14}, {0xd3, 14}, {0xd4, 14},
1860 :     {0xd5, 14}, {0xd6, 14}, {0xd7, 14}, {0xd8, 14},
1861 :     {0xd9, 14}, {0xda, 14}, {0xdb, 14}, {0xdc, 14},
1862 :     {0xdd, 14}, {0xde, 14}, {0xdf, 14}, {0xe0, 14},
1863 :     {0xe1, 14}, {0xe2, 14}, {0xe3, 14}, {0xe4, 14},
1864 :     {0xe5, 14}, {0xe6, 14}, {0xe7, 14}, {0xe8, 14},
1865 :     {0xe9, 14}, {0xea, 14}, {0xeb, 14}, {0xec, 14},
1866 :     {0xed, 14}, {0xee, 14}, {0xef, 14}, {0xf0, 14},
1867 :     {0xf1, 14}, {0xf2, 14}, {0xf3, 14}, {0xf4, 14},
1868 :     {0xf5, 14}, {0xf6, 14}, {0xf7, 14}, {0xf8, 14},
1869 :     {0xf9, 14}, {0xfa, 14}, {0xfb, 14}, {0xfc, 14},
1870 :     {0xfd, 14}, {0xfe, 14}, {0xff, 14}, {0x180, 16},
1871 :     {0x181, 16}, {0x182, 16}, {0x183, 16}, {0x184, 16},
1872 :     {0x185, 16}, {0x186, 16}, {0x187, 16}, {0x188, 16},
1873 :     {0x189, 16}, {0x18a, 16}, {0x18b, 16}, {0x18c, 16},
1874 :     {0x18d, 16}, {0x18e, 16}, {0x18f, 16}, {0x190, 16},
1875 :     {0x191, 16}, {0x192, 16}, {0x193, 16}, {0x194, 16},
1876 :     {0x195, 16}, {0x196, 16}, {0x197, 16}, {0x198, 16},
1877 :     {0x199, 16}, {0x19a, 16}, {0x19b, 16}, {0x19c, 16},
1878 :     {0x19d, 16}, {0x19e, 16}, {0x19f, 16}, {0x1a0, 16},
1879 :     {0x1a1, 16}, {0x1a2, 16}, {0x1a3, 16}, {0x1a4, 16},
1880 :     {0x1a5, 16}, {0x1a6, 16}, {0x1a7, 16}, {0x1a8, 16},
1881 :     {0x1a9, 16}, {0x1aa, 16}, {0x1ab, 16}, {0x1ac, 16},
1882 :     {0x1ad, 16}, {0x1ae, 16}, {0x1af, 16}, {0x1b0, 16},
1883 :     {0x1b1, 16}, {0x1b2, 16}, {0x1b3, 16}, {0x1b4, 16},
1884 :     {0x1b5, 16}, {0x1b6, 16}, {0x1b7, 16}, {0x1b8, 16},
1885 :     {0x1b9, 16}, {0x1ba, 16}, {0x1bb, 16}, {0x1bc, 16},
1886 :     {0x1bd, 16}, {0x1be, 16}, {0x1bf, 16}, {0x1c0, 16},
1887 :     {0x1c1, 16}, {0x1c2, 16}, {0x1c3, 16}, {0x1c4, 16},
1888 :     {0x1c5, 16}, {0x1c6, 16}, {0x1c7, 16}, {0x1c8, 16},
1889 :     {0x1c9, 16}, {0x1ca, 16}, {0x1cb, 16}, {0x1cc, 16},
1890 :     {0x1cd, 16}, {0x1ce, 16}, {0x1cf, 16}, {0x1d0, 16},
1891 :     {0x1d1, 16}, {0x1d2, 16}, {0x1d3, 16}, {0x1d4, 16},
1892 :     {0x1d5, 16}, {0x1d6, 16}, {0x1d7, 16}, {0x1d8, 16},
1893 :     {0x1d9, 16}, {0x1da, 16}, {0x1db, 16}, {0x1dc, 16},
1894 :     {0x1dd, 16}, {0x1de, 16}, {0x1df, 16}, {0x1e0, 16},
1895 :     {0x1e1, 16}, {0x1e2, 16}, {0x1e3, 16}, {0x1e4, 16},
1896 :     {0x1e5, 16}, {0x1e6, 16}, {0x1e7, 16}, {0x1e8, 16},
1897 :     {0x1e9, 16}, {0x1ea, 16}, {0x1eb, 16}, {0x1ec, 16},
1898 :     {0x1ed, 16}, {0x1ee, 16}, {0x1ef, 16}, {0x1f0, 16},
1899 :     {0x1f1, 16}, {0x1f2, 16}, {0x1f3, 16}, {0x1f4, 16},
1900 :     {0x1f5, 16}, {0x1f6, 16}, {0x1f7, 16}, {0x1f8, 16},
1901 :     {0x1f9, 16}, {0x1fa, 16}, {0x1fb, 16}, {0x1fc, 16},
1902 :     {0x1fd, 16}, {0x1fe, 16}, {0x1ff, 16},
1903 :     };
1904 :    
1905 :    
1906 :     const VLC mb_motion_table[65] = {
1907 :     {0x05, 13}, {0x07, 13}, {0x05, 12}, {0x07, 12},
1908 :     {0x09, 12}, {0x0b, 12}, {0x0d, 12}, {0x0f, 12},
1909 :     {0x09, 11}, {0x0b, 11}, {0x0d, 11}, {0x0f, 11},
1910 :     {0x11, 11}, {0x13, 11}, {0x15, 11}, {0x17, 11},
1911 :     {0x19, 11}, {0x1b, 11}, {0x1d, 11}, {0x1f, 11},
1912 :     {0x21, 11}, {0x23, 11}, {0x13, 10}, {0x15, 10},
1913 :     {0x17, 10}, {0x07, 8}, {0x09, 8}, {0x0b, 8},
1914 :     {0x07, 7}, {0x03, 5}, {0x03, 4}, {0x03, 3},
1915 :     {0x01, 1}, {0x02, 3}, {0x02, 4}, {0x02, 5},
1916 :     {0x06, 7}, {0x0a, 8}, {0x08, 8}, {0x06, 8},
1917 :     {0x16, 10}, {0x14, 10}, {0x12, 10}, {0x22, 11},
1918 :     {0x20, 11}, {0x1e, 11}, {0x1c, 11}, {0x1a, 11},
1919 :     {0x18, 11}, {0x16, 11}, {0x14, 11}, {0x12, 11},
1920 :     {0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11},
1921 :     {0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12},
1922 :     {0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13},
1923 :     {0x04, 13}
1924 :     };
1925 :    
1926 :    
1927 :     /******************************************************************
1928 :     * decoder tables *
1929 :     ******************************************************************/
1930 :    
1931 :     VLC const mcbpc_intra_table[64] = {
1932 :     {-1, 0}, {20, 6}, {36, 6}, {52, 6}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
1933 :     {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3},
1934 :     {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3},
1935 :     {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3},
1936 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1937 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1938 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1939 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}
1940 :     };
1941 :    
1942 :     VLC const mcbpc_inter_table[257] = {
1943 :     {VLC_ERROR, 0}, {255, 9}, {52, 9}, {36, 9}, {20, 9}, {49, 9}, {35, 8}, {35, 8},
1944 :     {19, 8}, {19, 8}, {50, 8}, {50, 8}, {51, 7}, {51, 7}, {51, 7}, {51, 7},
1945 :     {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
1946 :     {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
1947 :     {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6},
1948 :     {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6},
1949 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1950 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1951 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1952 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1953 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1954 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1955 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1956 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1957 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1958 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1959 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1960 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1961 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1962 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1963 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1964 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1965 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1966 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1967 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1968 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1969 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1970 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1971 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1972 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1973 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1974 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1975 :     {0, 1}
1976 :     };
1977 :    
1978 :     VLC const cbpy_table[64] = {
1979 :     {-1, 0}, {-1, 0}, {6, 6}, {9, 6}, {8, 5}, {8, 5}, {4, 5}, {4, 5},
1980 :     {2, 5}, {2, 5}, {1, 5}, {1, 5}, {0, 4}, {0, 4}, {0, 4}, {0, 4},
1981 :     {12, 4}, {12, 4}, {12, 4}, {12, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4},
1982 :     {14, 4}, {14, 4}, {14, 4}, {14, 4}, {5, 4}, {5, 4}, {5, 4}, {5, 4},
1983 :     {13, 4}, {13, 4}, {13, 4}, {13, 4}, {3, 4}, {3, 4}, {3, 4}, {3, 4},
1984 :     {11, 4}, {11, 4}, {11, 4}, {11, 4}, {7, 4}, {7, 4}, {7, 4}, {7, 4},
1985 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2},
1986 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}
1987 :     };
1988 :    
1989 :     VLC const TMNMVtab0[] = {
1990 :     {3, 4}, {-3, 4}, {2, 3}, {2, 3}, {-2, 3}, {-2, 3}, {1, 2},
1991 :     {1, 2}, {1, 2}, {1, 2}, {-1, 2}, {-1, 2}, {-1, 2}, {-1, 2}
1992 :     };
1993 :    
1994 :     VLC const TMNMVtab1[] = {
1995 :     {12, 10}, {-12, 10}, {11, 10}, {-11, 10},
1996 :     {10, 9}, {10, 9}, {-10, 9}, {-10, 9},
1997 :     {9, 9}, {9, 9}, {-9, 9}, {-9, 9},
1998 :     {8, 9}, {8, 9}, {-8, 9}, {-8, 9},
1999 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
2000 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
2001 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
2002 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
2003 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
2004 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
2005 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
2006 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
2007 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
2008 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
2009 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
2010 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
2011 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
2012 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
2013 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
2014 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
2015 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
2016 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
2017 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
2018 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6}
2019 :     };
2020 :    
2021 :     VLC const TMNMVtab2[] = {
2022 :     {32, 12}, {-32, 12}, {31, 12}, {-31, 12},
2023 :     {30, 11}, {30, 11}, {-30, 11}, {-30, 11},
2024 :     {29, 11}, {29, 11}, {-29, 11}, {-29, 11},
2025 :     {28, 11}, {28, 11}, {-28, 11}, {-28, 11},
2026 :     {27, 11}, {27, 11}, {-27, 11}, {-27, 11},
2027 :     {26, 11}, {26, 11}, {-26, 11}, {-26, 11},
2028 :     {25, 11}, {25, 11}, {-25, 11}, {-25, 11},
2029 :     {24, 10}, {24, 10}, {24, 10}, {24, 10},
2030 :     {-24, 10}, {-24, 10}, {-24, 10}, {-24, 10},
2031 :     {23, 10}, {23, 10}, {23, 10}, {23, 10},
2032 :     {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10},
2033 :     {22, 10}, {22, 10}, {22, 10}, {22, 10},
2034 :     {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},
2035 :     {21, 10}, {21, 10}, {21, 10}, {21, 10},
2036 :     {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},
2037 :     {20, 10}, {20, 10}, {20, 10}, {20, 10},
2038 :     {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10},
2039 :     {19, 10}, {19, 10}, {19, 10}, {19, 10},
2040 :     {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},
2041 :     {18, 10}, {18, 10}, {18, 10}, {18, 10},
2042 :     {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10},
2043 :     {17, 10}, {17, 10}, {17, 10}, {17, 10},
2044 :     {-17, 10}, {-17, 10}, {-17, 10}, {-17, 10},
2045 :     {16, 10}, {16, 10}, {16, 10}, {16, 10},
2046 :     {-16, 10}, {-16, 10}, {-16, 10}, {-16, 10},
2047 :     {15, 10}, {15, 10}, {15, 10}, {15, 10},
2048 :     {-15, 10}, {-15, 10}, {-15, 10}, {-15, 10},
2049 :     {14, 10}, {14, 10}, {14, 10}, {14, 10},
2050 :     {-14, 10}, {-14, 10}, {-14, 10}, {-14, 10},
2051 :     {13, 10}, {13, 10}, {13, 10}, {13, 10},
2052 :     {-13, 10}, {-13, 10}, {-13, 10}, {-13, 10}
2053 :     };
2054 :    
2055 :     short const dc_threshold[] = {
2056 :     21514, 26984, 8307, 28531, 29798, 24951, 25970, 26912,
2057 :     8307, 25956, 26994, 25974, 8292, 29286, 28015, 29728,
2058 :     25960, 18208, 21838, 18208, 19536, 22560, 26998, 8260,
2059 :     28515, 25956, 8291, 25640, 30309, 27749, 11817, 22794,
2060 :     30063, 8306, 28531, 29798, 24951, 25970, 25632, 29545,
2061 :     29300, 25193, 29813, 29295, 26656, 29537, 29728, 8303,
2062 :     26983, 25974, 24864, 25443, 29541, 8307, 28532, 26912,
2063 :     29556, 29472, 30063, 25458, 8293, 28515, 25956, 2606
2064 :     };
2065 :    
2066 :     VLC const dc_lum_tab[] = {
2067 :     {0, 0}, {4, 3}, {3, 3}, {0, 3},
2068 :     {2, 2}, {2, 2}, {1, 2}, {1, 2},
2069 :     };
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