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1 : edgomez 1.46 /*****************************************************************************
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 : Isibaar 1.53 * $Id: mbcoding.c,v 1.52 2005/09/13 12:12:15 suxen_drol Exp $
23 : edgomez 1.46 *
24 :     ****************************************************************************/
25 : edgomez 1.42
26 :     #include <stdio.h>
27 : Isibaar 1.8 #include <stdlib.h>
28 : edgomez 1.46 #include <string.h>
29 :    
30 : Isibaar 1.1 #include "../portab.h"
31 : edgomez 1.42 #include "../global.h"
32 : Isibaar 1.1 #include "bitstream.h"
33 :     #include "zigzag.h"
34 :     #include "vlc_codes.h"
35 : Isibaar 1.8 #include "mbcoding.h"
36 : Isibaar 1.1
37 :     #include "../utils/mbfunctions.h"
38 :    
39 : edgomez 1.37 #define LEVELOFFSET 32
40 :    
41 : edgomez 1.48 /* Initialized once during xvid_global call
42 :     * RO access is thread safe */
43 : edgomez 1.37 static REVERSE_EVENT DCT3D[2][4096];
44 :     static VLC coeff_VLC[2][2][64][64];
45 : edgomez 1.26
46 : edgomez 1.42 /* not really MB related, but VLCs are only available here */
47 :     void bs_put_spritetrajectory(Bitstream * bs, const int val)
48 :     {
49 :     const int code = sprite_trajectory_code[val+16384].code;
50 :     const int len = sprite_trajectory_code[val+16384].len;
51 :     const int code2 = sprite_trajectory_len[len].code;
52 :     const int len2 = sprite_trajectory_len[len].len;
53 :    
54 : edgomez 1.46 #if 0
55 :     printf("GMC=%d Code/Len = %d / %d ",val, code,len);
56 :     printf("Code2 / Len2 = %d / %d \n",code2,len2);
57 :     #endif
58 : edgomez 1.42
59 :     BitstreamPutBits(bs, code2, len2);
60 :     if (len) BitstreamPutBits(bs, code, len);
61 :     }
62 :    
63 :     int bs_get_spritetrajectory(Bitstream * bs)
64 :     {
65 :     int i;
66 :     for (i = 0; i < 12; i++)
67 :     {
68 :     if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code)
69 :     {
70 :     BitstreamSkip(bs, sprite_trajectory_len[i].len);
71 :     return i;
72 :     }
73 :     }
74 :     return -1;
75 :     }
76 : Isibaar 1.1
77 : edgomez 1.17 void
78 :     init_vlc_tables(void)
79 : Isibaar 1.1 {
80 : edgomez 1.42 uint32_t i, j, k, intra, last, run, run_esc, level, level_esc, escape, escape_len, offset;
81 :     int32_t l;
82 : edgomez 1.38
83 : edgomez 1.37 for (intra = 0; intra < 2; intra++)
84 :     for (i = 0; i < 4096; i++)
85 :     DCT3D[intra][i].event.level = 0;
86 :    
87 : edgomez 1.46 for (intra = 0; intra < 2; intra++) {
88 :     for (last = 0; last < 2; last++) {
89 :     for (run = 0; run < 63 + last; run++) {
90 :     for (level = 0; level < (uint32_t)(32 << intra); level++) {
91 : edgomez 1.37 offset = !intra * LEVELOFFSET;
92 :     coeff_VLC[intra][last][level + offset][run].len = 128;
93 : Isibaar 1.1 }
94 : edgomez 1.46 }
95 : edgomez 1.37 }
96 : edgomez 1.46 }
97 : Isibaar 1.8
98 : edgomez 1.46 for (intra = 0; intra < 2; intra++) {
99 :     for (i = 0; i < 102; i++) {
100 : edgomez 1.37 offset = !intra * LEVELOFFSET;
101 : edgomez 1.46
102 :     for (j = 0; j < (uint32_t)(1 << (12 - coeff_tab[intra][i].vlc.len)); j++) {
103 : edgomez 1.37 DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len;
104 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event;
105 :     }
106 : Isibaar 1.8
107 : edgomez 1.37 coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].code
108 :     = coeff_tab[intra][i].vlc.code << 1;
109 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len
110 :     = coeff_tab[intra][i].vlc.len + 1;
111 : edgomez 1.46
112 :     if (!intra) {
113 : edgomez 1.37 coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code
114 :     = (coeff_tab[intra][i].vlc.code << 1) | 1;
115 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len
116 :     = coeff_tab[intra][i].vlc.len + 1;
117 : Isibaar 1.1 }
118 :     }
119 : edgomez 1.46 }
120 :    
121 :     for (intra = 0; intra < 2; intra++) {
122 :     for (last = 0; last < 2; last++) {
123 :     for (run = 0; run < 63 + last; run++) {
124 :     for (level = 1; level < (uint32_t)(32 << intra); level++) {
125 : Isibaar 1.1
126 : edgomez 1.38 if (level <= max_level[intra][last][run] && run <= max_run[intra][last][level])
127 :     continue;
128 :    
129 : edgomez 1.37 offset = !intra * LEVELOFFSET;
130 : edgomez 1.38 level_esc = level - max_level[intra][last][run];
131 :     run_esc = run - 1 - max_run[intra][last][level];
132 :    
133 : edgomez 1.46 if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc]) {
134 : edgomez 1.38 escape = ESCAPE1;
135 :     escape_len = 7 + 1;
136 :     run_esc = run;
137 : edgomez 1.46 } else {
138 :     if (run_esc <= max_run[intra][last][level] && level <= max_level[intra][last][run_esc]) {
139 : edgomez 1.38 escape = ESCAPE2;
140 :     escape_len = 7 + 2;
141 :     level_esc = level;
142 : edgomez 1.46 } else {
143 :     if (!intra) {
144 : edgomez 1.38 coeff_VLC[intra][last][level + offset][run].code
145 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
146 :     coeff_VLC[intra][last][level + offset][run].len = 30;
147 :     coeff_VLC[intra][last][offset - level][run].code
148 : suxen_drol 1.44 = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-(int32_t)level & 0xfff) << 1) | 1;
149 : edgomez 1.38 coeff_VLC[intra][last][offset - level][run].len = 30;
150 : edgomez 1.37 }
151 : edgomez 1.38 continue;
152 : edgomez 1.37 }
153 : edgomez 1.38 }
154 :    
155 :     coeff_VLC[intra][last][level + offset][run].code
156 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
157 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code;
158 :     coeff_VLC[intra][last][level + offset][run].len
159 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
160 : edgomez 1.46
161 :     if (!intra) {
162 : edgomez 1.38 coeff_VLC[intra][last][offset - level][run].code
163 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
164 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code | 1;
165 :     coeff_VLC[intra][last][offset - level][run].len
166 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
167 :     }
168 : edgomez 1.37 }
169 : edgomez 1.38
170 : edgomez 1.46 if (!intra) {
171 : edgomez 1.37 coeff_VLC[intra][last][0][run].code
172 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1;
173 :     coeff_VLC[intra][last][0][run].len = 30;
174 :     }
175 :     }
176 : edgomez 1.46 }
177 :     }
178 :    
179 :     /* init sprite_trajectory tables
180 :     * even if GMC is not specified (it might be used later...) */
181 : edgomez 1.41
182 : edgomez 1.42 sprite_trajectory_code[0+16384].code = 0;
183 :     sprite_trajectory_code[0+16384].len = 0;
184 : edgomez 1.46 for (k=0;k<14;k++) {
185 : edgomez 1.42 int limit = (1<<k);
186 : edgomez 1.41
187 : edgomez 1.46 for (l=-(2*limit-1); l <= -limit; l++) {
188 : edgomez 1.42 sprite_trajectory_code[l+16384].code = (2*limit-1)+l;
189 :     sprite_trajectory_code[l+16384].len = k+1;
190 :     }
191 :    
192 : edgomez 1.46 for (l=limit; l<= 2*limit-1; l++) {
193 :     sprite_trajectory_code[l+16384].code = l;
194 : edgomez 1.42 sprite_trajectory_code[l+16384].len = k+1;
195 :     }
196 :     }
197 : Isibaar 1.1 }
198 :    
199 : edgomez 1.17 static __inline void
200 :     CodeVector(Bitstream * bs,
201 :     int32_t value,
202 : syskin 1.49 int32_t f_code)
203 : Isibaar 1.1 {
204 : edgomez 1.7
205 : Isibaar 1.1 const int scale_factor = 1 << (f_code - 1);
206 :     const int cmp = scale_factor << 5;
207 :    
208 : edgomez 1.17 if (value < (-1 * cmp))
209 : Isibaar 1.1 value += 64 * scale_factor;
210 : edgomez 1.17
211 :     if (value > (cmp - 1))
212 : Isibaar 1.1 value -= 64 * scale_factor;
213 :    
214 : edgomez 1.7 if (value == 0) {
215 : edgomez 1.17 BitstreamPutBits(bs, mb_motion_table[32].code,
216 :     mb_motion_table[32].len);
217 : edgomez 1.7 } else {
218 : Isibaar 1.1 uint16_t length, code, mv_res, sign;
219 : edgomez 1.17
220 : Isibaar 1.1 length = 16 << f_code;
221 :     f_code--;
222 : edgomez 1.17
223 : Isibaar 1.1 sign = (value < 0);
224 :    
225 : edgomez 1.17 if (value >= length)
226 : Isibaar 1.1 value -= 2 * length;
227 : edgomez 1.17 else if (value < -length)
228 : Isibaar 1.1 value += 2 * length;
229 :    
230 : edgomez 1.17 if (sign)
231 : Isibaar 1.1 value = -value;
232 :    
233 :     value--;
234 :     mv_res = value & ((1 << f_code) - 1);
235 :     code = ((value - mv_res) >> f_code) + 1;
236 :    
237 : edgomez 1.17 if (sign)
238 : Isibaar 1.1 code = -code;
239 :    
240 :     code += 32;
241 : edgomez 1.17 BitstreamPutBits(bs, mb_motion_table[code].code,
242 :     mb_motion_table[code].len);
243 :    
244 :     if (f_code)
245 : Isibaar 1.1 BitstreamPutBits(bs, mv_res, f_code);
246 : edgomez 1.7 }
247 :    
248 : Isibaar 1.1 }
249 :    
250 : edgomez 1.37 static __inline void
251 :     CodeCoeffInter(Bitstream * bs,
252 :     const int16_t qcoeff[64],
253 :     const uint16_t * zigzag)
254 :     {
255 :     uint32_t i, run, prev_run, code, len;
256 :     int32_t level, prev_level, level_shifted;
257 :    
258 :     i = 0;
259 :     run = 0;
260 :    
261 :     while (!(level = qcoeff[zigzag[i++]]))
262 :     run++;
263 :    
264 :     prev_level = level;
265 :     prev_run = run;
266 :     run = 0;
267 :    
268 :     while (i < 64)
269 :     {
270 :     if ((level = qcoeff[zigzag[i++]]) != 0)
271 :     {
272 :     level_shifted = prev_level + 32;
273 :     if (!(level_shifted & -64))
274 :     {
275 :     code = coeff_VLC[0][0][level_shifted][prev_run].code;
276 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
277 :     }
278 :     else
279 :     {
280 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
281 :     len = 30;
282 :     }
283 :     BitstreamPutBits(bs, code, len);
284 :     prev_level = level;
285 :     prev_run = run;
286 :     run = 0;
287 :     }
288 :     else
289 :     run++;
290 :     }
291 :    
292 :     level_shifted = prev_level + 32;
293 :     if (!(level_shifted & -64))
294 :     {
295 :     code = coeff_VLC[0][1][level_shifted][prev_run].code;
296 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
297 :     }
298 :     else
299 :     {
300 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
301 :     len = 30;
302 :     }
303 :     BitstreamPutBits(bs, code, len);
304 :     }
305 :    
306 :     static __inline void
307 :     CodeCoeffIntra(Bitstream * bs,
308 :     const int16_t qcoeff[64],
309 :     const uint16_t * zigzag)
310 :     {
311 :     uint32_t i, abs_level, run, prev_run, code, len;
312 :     int32_t level, prev_level;
313 :    
314 :     i = 1;
315 :     run = 0;
316 :    
317 : edgomez 1.42 while (i<64 && !(level = qcoeff[zigzag[i++]]))
318 : edgomez 1.37 run++;
319 :    
320 :     prev_level = level;
321 :     prev_run = run;
322 :     run = 0;
323 :    
324 :     while (i < 64)
325 :     {
326 :     if ((level = qcoeff[zigzag[i++]]) != 0)
327 :     {
328 : edgomez 1.46 abs_level = abs(prev_level);
329 : edgomez 1.37 abs_level = abs_level < 64 ? abs_level : 0;
330 :     code = coeff_VLC[1][0][abs_level][prev_run].code;
331 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
332 :     if (len != 128)
333 :     code |= (prev_level < 0);
334 :     else
335 :     {
336 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
337 :     len = 30;
338 :     }
339 :     BitstreamPutBits(bs, code, len);
340 :     prev_level = level;
341 :     prev_run = run;
342 :     run = 0;
343 :     }
344 :     else
345 :     run++;
346 :     }
347 :    
348 : edgomez 1.46 abs_level = abs(prev_level);
349 : edgomez 1.37 abs_level = abs_level < 64 ? abs_level : 0;
350 :     code = coeff_VLC[1][1][abs_level][prev_run].code;
351 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
352 :     if (len != 128)
353 :     code |= (prev_level < 0);
354 :     else
355 :     {
356 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
357 :     len = 30;
358 :     }
359 :     BitstreamPutBits(bs, code, len);
360 :     }
361 :    
362 : edgomez 1.42
363 :    
364 :     /* returns the number of bits required to encode qcoeff */
365 :    
366 : edgomez 1.46 int
367 : edgomez 1.42 CodeCoeffIntra_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
368 :     {
369 :     int bits = 0;
370 :     uint32_t i, abs_level, run, prev_run, len;
371 :     int32_t level, prev_level;
372 :    
373 :     i = 1;
374 :     run = 0;
375 :    
376 :     while (i<64 && !(level = qcoeff[zigzag[i++]]))
377 :     run++;
378 :    
379 :     if (i >= 64) return 0; /* empty block */
380 :    
381 :     prev_level = level;
382 :     prev_run = run;
383 :     run = 0;
384 :    
385 :     while (i < 64)
386 :     {
387 :     if ((level = qcoeff[zigzag[i++]]) != 0)
388 :     {
389 : edgomez 1.46 abs_level = abs(prev_level);
390 : edgomez 1.42 abs_level = abs_level < 64 ? abs_level : 0;
391 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
392 :     bits += len!=128 ? len : 30;
393 :    
394 :     prev_level = level;
395 :     prev_run = run;
396 :     run = 0;
397 :     }
398 :     else
399 :     run++;
400 :     }
401 :    
402 : edgomez 1.46 abs_level = abs(prev_level);
403 : edgomez 1.42 abs_level = abs_level < 64 ? abs_level : 0;
404 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
405 :     bits += len!=128 ? len : 30;
406 :    
407 :     return bits;
408 :     }
409 :    
410 :     int
411 :     CodeCoeffInter_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
412 :     {
413 :     uint32_t i, run, prev_run, len;
414 :     int32_t level, prev_level, level_shifted;
415 :     int bits = 0;
416 :    
417 :     i = 0;
418 :     run = 0;
419 :    
420 :     while (!(level = qcoeff[zigzag[i++]]))
421 :     run++;
422 :    
423 :     prev_level = level;
424 :     prev_run = run;
425 :     run = 0;
426 :    
427 :     while (i < 64) {
428 :     if ((level = qcoeff[zigzag[i++]]) != 0) {
429 :     level_shifted = prev_level + 32;
430 :     if (!(level_shifted & -64))
431 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
432 :     else
433 :     len = 30;
434 :    
435 :     bits += len;
436 :     prev_level = level;
437 :     prev_run = run;
438 :     run = 0;
439 :     }
440 :     else
441 :     run++;
442 :     }
443 :    
444 :     level_shifted = prev_level + 32;
445 :     if (!(level_shifted & -64))
446 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
447 :     else
448 :     len = 30;
449 :     bits += len;
450 :    
451 :     return bits;
452 :     }
453 :    
454 : edgomez 1.48 static const int iDQtab[5] = {
455 : edgomez 1.46 1, 0, -1 /* no change */, 2, 3
456 :     };
457 :     #define DQ_VALUE2INDEX(value) iDQtab[(value)+2]
458 : edgomez 1.42
459 : edgomez 1.37
460 : edgomez 1.42 static __inline void
461 :     CodeBlockIntra(const FRAMEINFO * const frame,
462 : edgomez 1.17 const MACROBLOCK * pMB,
463 :     int16_t qcoeff[6 * 64],
464 : edgomez 1.7 Bitstream * bs,
465 :     Statistics * pStat)
466 : Isibaar 1.1 {
467 : edgomez 1.7
468 : Isibaar 1.1 uint32_t i, mcbpc, cbpy, bits;
469 :    
470 :     cbpy = pMB->cbp >> 2;
471 :    
472 : edgomez 1.46 /* write mcbpc */
473 : edgomez 1.17 if (frame->coding_type == I_VOP) {
474 : edgomez 1.7 mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2);
475 : edgomez 1.17 BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code,
476 :     mcbpc_intra_tab[mcbpc].len);
477 :     } else {
478 : edgomez 1.7 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
479 : edgomez 1.17 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
480 :     mcbpc_inter_tab[mcbpc].len);
481 : Isibaar 1.4 }
482 : Isibaar 1.1
483 : edgomez 1.46 /* ac prediction flag */
484 : edgomez 1.17 if (pMB->acpred_directions[0])
485 : edgomez 1.7 BitstreamPutBits(bs, 1, 1);
486 : Isibaar 1.1 else
487 : edgomez 1.7 BitstreamPutBits(bs, 0, 1);
488 : Isibaar 1.1
489 : edgomez 1.46 /* write cbpy */
490 : chl 1.45 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
491 : Isibaar 1.1
492 : edgomez 1.46 /* write dquant */
493 : edgomez 1.17 if (pMB->mode == MODE_INTRA_Q)
494 : edgomez 1.46 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
495 : Isibaar 1.1
496 : edgomez 1.46 /* write interlacing */
497 :     if (frame->vol_flags & XVID_VOL_INTERLACING) {
498 : h 1.6 BitstreamPutBit(bs, pMB->field_dct);
499 :     }
500 : edgomez 1.46 /* code block coeffs */
501 : edgomez 1.17 for (i = 0; i < 6; i++) {
502 :     if (i < 4)
503 :     BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code,
504 :     dcy_tab[qcoeff[i * 64 + 0] + 255].len);
505 : Isibaar 1.1 else
506 : edgomez 1.17 BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code,
507 :     dcc_tab[qcoeff[i * 64 + 0] + 255].len);
508 :    
509 :     if (pMB->cbp & (1 << (5 - i))) {
510 : edgomez 1.42 const uint16_t *scan_table =
511 : edgomez 1.46 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
512 : edgomez 1.42 scan_tables[2] : scan_tables[pMB->acpred_directions[i]];
513 :    
514 : Isibaar 1.1 bits = BitstreamPos(bs);
515 :    
516 : edgomez 1.42 CodeCoeffIntra(bs, &qcoeff[i * 64], scan_table);
517 :    
518 : Isibaar 1.1 bits = BitstreamPos(bs) - bits;
519 :     pStat->iTextBits += bits;
520 :     }
521 :     }
522 : edgomez 1.7
523 : Isibaar 1.1 }
524 :    
525 :    
526 : edgomez 1.17 static void
527 : edgomez 1.42 CodeBlockInter(const FRAMEINFO * const frame,
528 : edgomez 1.17 const MACROBLOCK * pMB,
529 :     int16_t qcoeff[6 * 64],
530 : edgomez 1.7 Bitstream * bs,
531 :     Statistics * pStat)
532 : Isibaar 1.1 {
533 : edgomez 1.7
534 : Isibaar 1.1 int32_t i;
535 :     uint32_t bits, mcbpc, cbpy;
536 :    
537 : edgomez 1.7 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
538 : Isibaar 1.1 cbpy = 15 - (pMB->cbp >> 2);
539 :    
540 : edgomez 1.46 /* write mcbpc */
541 : edgomez 1.17 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
542 :     mcbpc_inter_tab[mcbpc].len);
543 : Isibaar 1.1
544 : edgomez 1.42 if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) )
545 : edgomez 1.46 BitstreamPutBit(bs, pMB->mcsel); /* mcsel: '0'=local motion, '1'=GMC */
546 : edgomez 1.42
547 : edgomez 1.46 /* write cbpy */
548 : chl 1.45 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
549 : Isibaar 1.1
550 : edgomez 1.46 /* write dquant */
551 : edgomez 1.17 if (pMB->mode == MODE_INTER_Q)
552 : edgomez 1.46 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
553 : edgomez 1.17
554 : edgomez 1.46 /* interlacing */
555 :     if (frame->vol_flags & XVID_VOL_INTERLACING) {
556 : h 1.25 if (pMB->cbp) {
557 :     BitstreamPutBit(bs, pMB->field_dct);
558 : edgomez 1.46 DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", pMB->field_dct);
559 : h 1.25 }
560 : h 1.6
561 : edgomez 1.46 /* if inter block, write field ME flag */
562 :     if ((pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) && (pMB->mcsel == 0)) {
563 :     BitstreamPutBit(bs, 0 /*pMB->field_pred*/); /* not implemented yet */
564 :     DPRINTF(XVID_DEBUG_MB,"codep: field_pred: %i\n", pMB->field_pred);
565 : h 1.6
566 : edgomez 1.46 /* write field prediction references */
567 :     #if 0 /* Remove the #if once field_pred is supported */
568 : edgomez 1.17 if (pMB->field_pred) {
569 : h 1.6 BitstreamPutBit(bs, pMB->field_for_top);
570 :     BitstreamPutBit(bs, pMB->field_for_bot);
571 :     }
572 : edgomez 1.46 #endif
573 : h 1.6 }
574 :     }
575 : Isibaar 1.53
576 :     bits = BitstreamPos(bs);
577 :    
578 : edgomez 1.46 /* code motion vector(s) if motion is local */
579 : edgomez 1.42 if (!pMB->mcsel)
580 :     for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) {
581 : syskin 1.49 CodeVector(bs, pMB->pmvs[i].x, frame->fcode);
582 :     CodeVector(bs, pMB->pmvs[i].y, frame->fcode);
583 : edgomez 1.42 }
584 : Isibaar 1.1
585 : Isibaar 1.53 bits = BitstreamPos(bs) - bits;
586 :     pStat->iMVBits += bits;
587 :    
588 : Isibaar 1.1 bits = BitstreamPos(bs);
589 : edgomez 1.17
590 : edgomez 1.46 /* code block coeffs */
591 : edgomez 1.17 for (i = 0; i < 6; i++)
592 : edgomez 1.46 if (pMB->cbp & (1 << (5 - i))) {
593 : edgomez 1.42 const uint16_t *scan_table =
594 : edgomez 1.46 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
595 : edgomez 1.42 scan_tables[2] : scan_tables[0];
596 :    
597 :     CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
598 :     }
599 : Isibaar 1.1
600 :     bits = BitstreamPos(bs) - bits;
601 :     pStat->iTextBits += bits;
602 :     }
603 :    
604 :    
605 : edgomez 1.17 void
606 : edgomez 1.42 MBCoding(const FRAMEINFO * const frame,
607 : edgomez 1.17 MACROBLOCK * pMB,
608 :     int16_t qcoeff[6 * 64],
609 :     Bitstream * bs,
610 :     Statistics * pStat)
611 : Isibaar 1.1 {
612 : edgomez 1.46 if (frame->coding_type != I_VOP)
613 :     BitstreamPutBit(bs, 0); /* not_coded */
614 :    
615 : syskin 1.50 if (frame->vop_flags & XVID_VOP_GREYSCALE) {
616 :     pMB->cbp &= 0x3C; /* keep only bits 5-2 */
617 :     qcoeff[4*64+0]=0; /* for INTRA DC value is saved */
618 :     qcoeff[5*64+0]=0;
619 :     }
620 :    
621 : chl 1.22 if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
622 : suxen_drol 1.13 CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
623 : Isibaar 1.1 else
624 : suxen_drol 1.13 CodeBlockInter(frame, pMB, qcoeff, bs, pStat);
625 : edgomez 1.7
626 : Isibaar 1.1 }
627 : chl 1.24
628 : edgomez 1.42 /***************************************************************
629 :     * bframe encoding start
630 :     ***************************************************************/
631 : Isibaar 1.1
632 : edgomez 1.27 /*
633 : edgomez 1.42 mbtype
634 :     0 1b direct(h263) mvdb
635 :     1 01b interpolate mc+q dbquant, mvdf, mvdb
636 :     2 001b backward mc+q dbquant, mvdb
637 :     3 0001b forward mc+q dbquant, mvdf
638 :     */
639 : suxen_drol 1.19
640 : edgomez 1.42 static __inline void
641 :     put_bvop_mbtype(Bitstream * bs,
642 :     int value)
643 :     {
644 :     switch (value) {
645 :     case MODE_FORWARD:
646 :     BitstreamPutBit(bs, 0);
647 :     case MODE_BACKWARD:
648 :     BitstreamPutBit(bs, 0);
649 :     case MODE_INTERPOLATE:
650 :     BitstreamPutBit(bs, 0);
651 :     case MODE_DIRECT:
652 :     BitstreamPutBit(bs, 1);
653 :     default:
654 :     break;
655 :     }
656 :     }
657 :    
658 :     /*
659 :     dbquant
660 :     -2 10b
661 :     0 0b
662 :     +2 11b
663 :     */
664 :    
665 :     static __inline void
666 :     put_bvop_dbquant(Bitstream * bs,
667 :     int value)
668 :     {
669 :     switch (value) {
670 :     case 0:
671 :     BitstreamPutBit(bs, 0);
672 :     return;
673 :    
674 :     case -2:
675 :     BitstreamPutBit(bs, 1);
676 :     BitstreamPutBit(bs, 0);
677 :     return;
678 :    
679 :     case 2:
680 :     BitstreamPutBit(bs, 1);
681 :     BitstreamPutBit(bs, 1);
682 :     return;
683 :    
684 : edgomez 1.46 default:; /* invalid */
685 : edgomez 1.42 }
686 :     }
687 :    
688 :    
689 :    
690 :     void
691 : edgomez 1.46 MBCodingBVOP(const FRAMEINFO * const frame,
692 :     const MACROBLOCK * mb,
693 : edgomez 1.42 const int16_t qcoeff[6 * 64],
694 :     const int32_t fcode,
695 :     const int32_t bcode,
696 :     Bitstream * bs,
697 : edgomez 1.46 Statistics * pStat)
698 : edgomez 1.42 {
699 :     int vcode = fcode;
700 :     unsigned int i;
701 :    
702 : edgomez 1.46 const uint16_t *scan_table =
703 :     frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
704 :     scan_tables[2] : scan_tables[0];
705 :     int bits;
706 :    
707 : edgomez 1.42 /* ------------------------------------------------------------------
708 :     when a block is skipped it is decoded DIRECT(0,0)
709 :     hence is interpolated from forward & backward frames
710 :     ------------------------------------------------------------------ */
711 :    
712 :     if (mb->mode == MODE_DIRECT_NONE_MV) {
713 : edgomez 1.46 BitstreamPutBit(bs, 1); /* skipped */
714 : edgomez 1.42 return;
715 :     }
716 :    
717 : edgomez 1.46 BitstreamPutBit(bs, 0); /* not skipped */
718 : edgomez 1.42
719 :     if (mb->cbp == 0) {
720 : edgomez 1.46 BitstreamPutBit(bs, 1); /* cbp == 0 */
721 : edgomez 1.42 } else {
722 : edgomez 1.46 BitstreamPutBit(bs, 0); /* cbp == xxx */
723 : edgomez 1.42 }
724 :    
725 :     put_bvop_mbtype(bs, mb->mode);
726 :    
727 :     if (mb->cbp) {
728 :     BitstreamPutBits(bs, mb->cbp, 6);
729 :     }
730 :    
731 :     if (mb->mode != MODE_DIRECT && mb->cbp != 0) {
732 : edgomez 1.46 put_bvop_dbquant(bs, 0); /* todo: mb->dquant = 0 */
733 : edgomez 1.42 }
734 :    
735 : edgomez 1.46 if (frame->vol_flags & XVID_VOL_INTERLACING) {
736 :     if (mb->cbp) {
737 :     BitstreamPutBit(bs, mb->field_dct);
738 :     DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", mb->field_dct);
739 :     }
740 :    
741 :     /* if not direct block, write field ME flag */
742 :     if (mb->mode != MODE_DIRECT) {
743 :     BitstreamPutBit(bs, 0 /*mb->field_pred*/); /* field ME not implemented */
744 :    
745 :     /* write field prediction references */
746 :     #if 0 /* Remove the #if once field_pred is supported */
747 :     if (mb->field_pred) {
748 :     BitstreamPutBit(bs, mb->field_for_top);
749 :     BitstreamPutBit(bs, mb->field_for_bot);
750 :     }
751 :     #endif
752 :     }
753 :     }
754 :    
755 : Isibaar 1.53 bits = BitstreamPos(bs);
756 : edgomez 1.46
757 : edgomez 1.42 switch (mb->mode) {
758 :     case MODE_INTERPOLATE:
759 : syskin 1.49 CodeVector(bs, mb->pmvs[1].x, vcode); /* forward vector of interpolate mode */
760 :     CodeVector(bs, mb->pmvs[1].y, vcode);
761 : edgomez 1.42 case MODE_BACKWARD:
762 :     vcode = bcode;
763 :     case MODE_FORWARD:
764 : syskin 1.49 CodeVector(bs, mb->pmvs[0].x, vcode);
765 :     CodeVector(bs, mb->pmvs[0].y, vcode);
766 : edgomez 1.42 break;
767 :     case MODE_DIRECT:
768 : syskin 1.49 CodeVector(bs, mb->pmvs[3].x, 1); /* fcode is always 1 for delta vector */
769 :     CodeVector(bs, mb->pmvs[3].y, 1); /* prediction is always (0,0) */
770 : edgomez 1.42 default: break;
771 :     }
772 : Isibaar 1.53 pStat->iMVBits += BitstreamPos(bs) - bits;
773 : edgomez 1.42
774 : edgomez 1.46 bits = BitstreamPos(bs);
775 : edgomez 1.42 for (i = 0; i < 6; i++) {
776 :     if (mb->cbp & (1 << (5 - i))) {
777 : edgomez 1.46 CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
778 : edgomez 1.42 }
779 :     }
780 : edgomez 1.46 pStat->iTextBits += BitstreamPos(bs) - bits;
781 : edgomez 1.42 }
782 :    
783 :    
784 :    
785 :     /***************************************************************
786 :     * decoding stuff starts here *
787 :     ***************************************************************/
788 :    
789 :    
790 : edgomez 1.46 /*
791 :     * for IVOP addbits == 0
792 :     * for PVOP addbits == fcode - 1
793 :     * for BVOP addbits == max(fcode,bcode) - 1
794 :     * returns true or false
795 :     */
796 :     int
797 : suxen_drol 1.19 check_resync_marker(Bitstream * bs, int addbits)
798 :     {
799 :     uint32_t nbits;
800 :     uint32_t code;
801 :     uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
802 :    
803 :     nbits = BitstreamNumBitsToByteAlign(bs);
804 :     code = BitstreamShowBits(bs, nbits);
805 :    
806 :     if (code == (((uint32_t)1 << (nbits - 1)) - 1))
807 :     {
808 :     return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER;
809 :     }
810 :    
811 :     return 0;
812 :     }
813 :    
814 :    
815 :    
816 : edgomez 1.17 int
817 :     get_mcbpc_intra(Bitstream * bs)
818 : Isibaar 1.1 {
819 : edgomez 1.7
820 : Isibaar 1.1 uint32_t index;
821 : edgomez 1.17
822 : suxen_drol 1.19 index = BitstreamShowBits(bs, 9);
823 : Isibaar 1.1 index >>= 3;
824 :    
825 :     BitstreamSkip(bs, mcbpc_intra_table[index].len);
826 : edgomez 1.7
827 : Isibaar 1.1 return mcbpc_intra_table[index].code;
828 : edgomez 1.7
829 : Isibaar 1.1 }
830 :    
831 : edgomez 1.17 int
832 :     get_mcbpc_inter(Bitstream * bs)
833 : Isibaar 1.1 {
834 : edgomez 1.7
835 : Isibaar 1.1 uint32_t index;
836 : edgomez 1.46
837 : edgomez 1.42 index = MIN(BitstreamShowBits(bs, 9), 256);
838 : Isibaar 1.1
839 : edgomez 1.17 BitstreamSkip(bs, mcbpc_inter_table[index].len);
840 : edgomez 1.7
841 : Isibaar 1.1 return mcbpc_inter_table[index].code;
842 : edgomez 1.7
843 : Isibaar 1.1 }
844 :    
845 : edgomez 1.17 int
846 :     get_cbpy(Bitstream * bs,
847 :     int intra)
848 : Isibaar 1.1 {
849 : edgomez 1.7
850 : Isibaar 1.1 int cbpy;
851 :     uint32_t index = BitstreamShowBits(bs, 6);
852 :    
853 :     BitstreamSkip(bs, cbpy_table[index].len);
854 :     cbpy = cbpy_table[index].code;
855 :    
856 : edgomez 1.17 if (!intra)
857 : Isibaar 1.1 cbpy = 15 - cbpy;
858 :    
859 :     return cbpy;
860 : edgomez 1.7
861 : Isibaar 1.1 }
862 :    
863 : edgomez 1.42 static __inline int
864 : edgomez 1.17 get_mv_data(Bitstream * bs)
865 : Isibaar 1.1 {
866 : edgomez 1.7
867 : Isibaar 1.1 uint32_t index;
868 :    
869 : edgomez 1.17 if (BitstreamGetBit(bs))
870 : Isibaar 1.1 return 0;
871 : edgomez 1.17
872 : Isibaar 1.1 index = BitstreamShowBits(bs, 12);
873 :    
874 : edgomez 1.17 if (index >= 512) {
875 : Isibaar 1.1 index = (index >> 8) - 2;
876 :     BitstreamSkip(bs, TMNMVtab0[index].len);
877 :     return TMNMVtab0[index].code;
878 :     }
879 : edgomez 1.17
880 :     if (index >= 128) {
881 : Isibaar 1.1 index = (index >> 2) - 32;
882 :     BitstreamSkip(bs, TMNMVtab1[index].len);
883 :     return TMNMVtab1[index].code;
884 :     }
885 :    
886 : edgomez 1.17 index -= 4;
887 : Isibaar 1.1
888 :     BitstreamSkip(bs, TMNMVtab2[index].len);
889 :     return TMNMVtab2[index].code;
890 : edgomez 1.7
891 : Isibaar 1.1 }
892 :    
893 : edgomez 1.17 int
894 :     get_mv(Bitstream * bs,
895 :     int fcode)
896 : Isibaar 1.1 {
897 : edgomez 1.7
898 : Isibaar 1.1 int data;
899 :     int res;
900 :     int mv;
901 :     int scale_fac = 1 << (fcode - 1);
902 :    
903 :     data = get_mv_data(bs);
904 : edgomez 1.17
905 :     if (scale_fac == 1 || data == 0)
906 : Isibaar 1.1 return data;
907 :    
908 :     res = BitstreamGetBits(bs, fcode - 1);
909 : edgomez 1.46 mv = ((abs(data) - 1) * scale_fac) + res + 1;
910 : edgomez 1.17
911 : Isibaar 1.1 return data < 0 ? -mv : mv;
912 : edgomez 1.7
913 : Isibaar 1.1 }
914 :    
915 : edgomez 1.17 int
916 :     get_dc_dif(Bitstream * bs,
917 :     uint32_t dc_size)
918 : Isibaar 1.1 {
919 : edgomez 1.7
920 : Isibaar 1.1 int code = BitstreamGetBits(bs, dc_size);
921 :     int msb = code >> (dc_size - 1);
922 :    
923 : edgomez 1.17 if (msb == 0)
924 :     return (-1 * (code ^ ((1 << dc_size) - 1)));
925 : Isibaar 1.1
926 :     return code;
927 : edgomez 1.7
928 : Isibaar 1.1 }
929 :    
930 : edgomez 1.17 int
931 :     get_dc_size_lum(Bitstream * bs)
932 : Isibaar 1.1 {
933 : edgomez 1.7
934 : Isibaar 1.1 int code, i;
935 : edgomez 1.17
936 : Isibaar 1.1 code = BitstreamShowBits(bs, 11);
937 :    
938 : edgomez 1.17 for (i = 11; i > 3; i--) {
939 :     if (code == 1) {
940 : Isibaar 1.1 BitstreamSkip(bs, i);
941 :     return i + 1;
942 :     }
943 :     code >>= 1;
944 :     }
945 :    
946 :     BitstreamSkip(bs, dc_lum_tab[code].len);
947 :     return dc_lum_tab[code].code;
948 : edgomez 1.7
949 : Isibaar 1.1 }
950 :    
951 :    
952 : edgomez 1.17 int
953 :     get_dc_size_chrom(Bitstream * bs)
954 : Isibaar 1.1 {
955 : edgomez 1.7
956 : Isibaar 1.1 uint32_t code, i;
957 : edgomez 1.17
958 : Isibaar 1.1 code = BitstreamShowBits(bs, 12);
959 :    
960 : edgomez 1.17 for (i = 12; i > 2; i--) {
961 :     if (code == 1) {
962 : Isibaar 1.1 BitstreamSkip(bs, i);
963 :     return i;
964 :     }
965 :     code >>= 1;
966 :     }
967 :    
968 :     return 3 - BitstreamGetBits(bs, 2);
969 : edgomez 1.7
970 : Isibaar 1.1 }
971 : edgomez 1.27
972 : edgomez 1.47 #define GET_BITS(cache, n) ((cache)>>(32-(n)))
973 :    
974 : edgomez 1.27 static __inline int
975 :     get_coeff(Bitstream * bs,
976 :     int *run,
977 :     int *last,
978 :     int intra,
979 :     int short_video_header)
980 :     {
981 :    
982 :     uint32_t mode;
983 :     int32_t level;
984 : edgomez 1.37 REVERSE_EVENT *reverse_event;
985 : edgomez 1.27
986 : edgomez 1.47 uint32_t cache = BitstreamShowBits(bs, 32);
987 :    
988 : edgomez 1.34 if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */
989 : edgomez 1.27 intra = 0;
990 :    
991 : edgomez 1.47 if (GET_BITS(cache, 7) != ESCAPE) {
992 :     reverse_event = &DCT3D[intra][GET_BITS(cache, 12)];
993 : edgomez 1.37
994 :     if ((level = reverse_event->event.level) == 0)
995 :     goto error;
996 : edgomez 1.27
997 : edgomez 1.37 *last = reverse_event->event.last;
998 :     *run = reverse_event->event.run;
999 : edgomez 1.27
1000 : edgomez 1.47 /* Don't forget to update the bitstream position */
1001 :     BitstreamSkip(bs, reverse_event->len+1);
1002 : edgomez 1.27
1003 : edgomez 1.47 return (GET_BITS(cache, reverse_event->len+1)&0x01) ? -level : level;
1004 : edgomez 1.27 }
1005 :    
1006 : edgomez 1.47 /* flush 7bits of cache */
1007 :     cache <<= 7;
1008 : edgomez 1.37
1009 : edgomez 1.27 if (short_video_header) {
1010 : edgomez 1.34 /* escape mode 4 - H.263 type, only used if short_video_header = 1 */
1011 : edgomez 1.47 *last = GET_BITS(cache, 1);
1012 :     *run = (GET_BITS(cache, 7) &0x3f);
1013 :     level = (GET_BITS(cache, 15)&0xff);
1014 : edgomez 1.27
1015 :     if (level == 0 || level == 128)
1016 : edgomez 1.46 DPRINTF(XVID_DEBUG_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d\n", level);
1017 : edgomez 1.27
1018 : edgomez 1.47 /* We've "eaten" 22 bits */
1019 :     BitstreamSkip(bs, 22);
1020 :    
1021 : edgomez 1.37 return (level << 24) >> 24;
1022 : edgomez 1.27 }
1023 :    
1024 : edgomez 1.47 if ((mode = GET_BITS(cache, 2)) < 3) {
1025 :     const int skip[3] = {1, 1, 2};
1026 :     cache <<= skip[mode];
1027 : edgomez 1.27
1028 : edgomez 1.47 reverse_event = &DCT3D[intra][GET_BITS(cache, 12)];
1029 : edgomez 1.37
1030 :     if ((level = reverse_event->event.level) == 0)
1031 : edgomez 1.27 goto error;
1032 :    
1033 : edgomez 1.37 *last = reverse_event->event.last;
1034 :     *run = reverse_event->event.run;
1035 : edgomez 1.27
1036 : edgomez 1.47 if (mode < 2) {
1037 :     /* first escape mode, level is offset */
1038 : edgomez 1.37 level += max_level[intra][*last][*run];
1039 : edgomez 1.47 } else {
1040 :     /* second escape mode, run is offset */
1041 : edgomez 1.37 *run += max_run[intra][*last][level] + 1;
1042 : edgomez 1.47 }
1043 :    
1044 :     /* Update bitstream position */
1045 :     BitstreamSkip(bs, 7 + skip[mode] + reverse_event->len + 1);
1046 : edgomez 1.27
1047 : edgomez 1.47 return (GET_BITS(cache, reverse_event->len+1)&0x01) ? -level : level;
1048 : edgomez 1.27 }
1049 : edgomez 1.37
1050 : edgomez 1.34 /* third escape mode - fixed length codes */
1051 : edgomez 1.47 cache <<= 2;
1052 :     *last = GET_BITS(cache, 1);
1053 :     *run = (GET_BITS(cache, 7)&0x3f);
1054 :     level = (GET_BITS(cache, 20)&0xfff);
1055 :    
1056 :     /* Update bitstream position */
1057 :     BitstreamSkip(bs, 30);
1058 : edgomez 1.27
1059 : edgomez 1.37 return (level << 20) >> 20;
1060 : edgomez 1.27
1061 :     error:
1062 :     *run = VLC_ERROR;
1063 :     return 0;
1064 :     }
1065 :    
1066 : edgomez 1.17 void
1067 :     get_intra_block(Bitstream * bs,
1068 :     int16_t * block,
1069 :     int direction,
1070 :     int coeff)
1071 : Isibaar 1.1 {
1072 : edgomez 1.7
1073 : edgomez 1.17 const uint16_t *scan = scan_tables[direction];
1074 : edgomez 1.42 int level, run, last;
1075 : Isibaar 1.1
1076 : edgomez 1.17 do {
1077 : Isibaar 1.1 level = get_coeff(bs, &run, &last, 1, 0);
1078 : edgomez 1.17 if (run == -1) {
1079 : edgomez 1.46 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1080 : Isibaar 1.1 break;
1081 :     }
1082 :     coeff += run;
1083 : suxen_drol 1.52
1084 :     #ifdef _DEBUG
1085 :     if(coeff>=64) {
1086 :     DPRINTF(XVID_DEBUG_ERROR,"error: overflow in coefficient index\n");
1087 :     return;
1088 :     }
1089 :     #endif
1090 :    
1091 : edgomez 1.17 block[scan[coeff]] = level;
1092 : suxen_drol 1.20
1093 : edgomez 1.46 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[coeff], level);
1094 :     #if 0
1095 :     DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[coeff], level, BitstreamShowBits(bs, 32));
1096 :     #endif
1097 : suxen_drol 1.20
1098 : suxen_drol 1.36 if (level < -2047 || level > 2047) {
1099 : edgomez 1.46 DPRINTF(XVID_DEBUG_ERROR,"warning: intra_overflow %i\n", level);
1100 : Isibaar 1.1 }
1101 :     coeff++;
1102 :     } while (!last);
1103 : edgomez 1.7
1104 : Isibaar 1.1 }
1105 :    
1106 : edgomez 1.17 void
1107 : edgomez 1.47 get_inter_block_h263(
1108 :     Bitstream * bs,
1109 :     int16_t * block,
1110 :     int direction,
1111 :     const int quant,
1112 :     const uint16_t *matrix)
1113 : Isibaar 1.1 {
1114 : edgomez 1.7
1115 : edgomez 1.42 const uint16_t *scan = scan_tables[direction];
1116 : edgomez 1.47 const uint16_t quant_m_2 = quant << 1;
1117 :     const uint16_t quant_add = (quant & 1 ? quant : quant - 1);
1118 : Isibaar 1.1 int p;
1119 :     int level;
1120 :     int run;
1121 :     int last;
1122 :    
1123 :     p = 0;
1124 : edgomez 1.17 do {
1125 : Isibaar 1.1 level = get_coeff(bs, &run, &last, 0, 0);
1126 : edgomez 1.17 if (run == -1) {
1127 : edgomez 1.46 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1128 : Isibaar 1.1 break;
1129 :     }
1130 :     p += run;
1131 : chenm001 1.16
1132 : suxen_drol 1.52 #ifdef _DEBUG
1133 :     if(p>=64) {
1134 :     DPRINTF(XVID_DEBUG_ERROR,"error: overflow in coefficient index\n");
1135 :     return;
1136 :     }
1137 :     #endif
1138 :    
1139 : edgomez 1.47 if (level < 0) {
1140 :     level = level*quant_m_2 - quant_add;
1141 :     block[scan[p]] = (level >= -2048 ? level : -2048);
1142 :     } else {
1143 :     level = level * quant_m_2 + quant_add;
1144 :     block[scan[p]] = (level <= 2047 ? level : 2047);
1145 :     }
1146 :     p++;
1147 :     } while (!last);
1148 :     }
1149 :    
1150 :     void
1151 :     get_inter_block_mpeg(
1152 :     Bitstream * bs,
1153 :     int16_t * block,
1154 :     int direction,
1155 :     const int quant,
1156 :     const uint16_t *matrix)
1157 :     {
1158 :     const uint16_t *scan = scan_tables[direction];
1159 :     uint32_t sum = 0;
1160 :     int p;
1161 :     int level;
1162 :     int run;
1163 :     int last;
1164 : suxen_drol 1.20
1165 : edgomez 1.47 p = 0;
1166 :     do {
1167 :     level = get_coeff(bs, &run, &last, 0, 0);
1168 :     if (run == -1) {
1169 :     DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
1170 :     break;
1171 :     }
1172 :     p += run;
1173 : suxen_drol 1.20
1174 : suxen_drol 1.52 #ifdef _DEBUG
1175 :     if(p>=64) {
1176 :     DPRINTF(XVID_DEBUG_ERROR,"error: overflow in coefficient index\n");
1177 :     return;
1178 :     }
1179 :     #endif
1180 :    
1181 : edgomez 1.47 if (level < 0) {
1182 :     level = ((2 * -level + 1) * matrix[scan[p]] * quant) >> 4;
1183 :     block[scan[p]] = (level <= 2048 ? -level : -2048);
1184 :     } else {
1185 :     level = ((2 * level + 1) * matrix[scan[p]] * quant) >> 4;
1186 :     block[scan[p]] = (level <= 2047 ? level : 2047);
1187 : Isibaar 1.1 }
1188 : edgomez 1.47
1189 :     sum ^= block[scan[p]];
1190 :    
1191 : Isibaar 1.1 p++;
1192 :     } while (!last);
1193 : edgomez 1.7
1194 : edgomez 1.47 /* mismatch control */
1195 :     if ((sum & 1) == 0) {
1196 :     block[63] ^= 1;
1197 :     }
1198 : Isibaar 1.1 }
1199 : edgomez 1.43
1200 : edgomez 1.46
1201 : edgomez 1.43 /*****************************************************************************
1202 :     * VLC tables and other constant arrays
1203 :     ****************************************************************************/
1204 :    
1205 :     VLC_TABLE const coeff_tab[2][102] =
1206 :     {
1207 :     /* intra = 0 */
1208 :     {
1209 :     {{ 2, 2}, {0, 0, 1}},
1210 :     {{15, 4}, {0, 0, 2}},
1211 :     {{21, 6}, {0, 0, 3}},
1212 :     {{23, 7}, {0, 0, 4}},
1213 :     {{31, 8}, {0, 0, 5}},
1214 :     {{37, 9}, {0, 0, 6}},
1215 :     {{36, 9}, {0, 0, 7}},
1216 :     {{33, 10}, {0, 0, 8}},
1217 :     {{32, 10}, {0, 0, 9}},
1218 :     {{ 7, 11}, {0, 0, 10}},
1219 :     {{ 6, 11}, {0, 0, 11}},
1220 :     {{32, 11}, {0, 0, 12}},
1221 :     {{ 6, 3}, {0, 1, 1}},
1222 :     {{20, 6}, {0, 1, 2}},
1223 :     {{30, 8}, {0, 1, 3}},
1224 :     {{15, 10}, {0, 1, 4}},
1225 :     {{33, 11}, {0, 1, 5}},
1226 :     {{80, 12}, {0, 1, 6}},
1227 :     {{14, 4}, {0, 2, 1}},
1228 :     {{29, 8}, {0, 2, 2}},
1229 :     {{14, 10}, {0, 2, 3}},
1230 :     {{81, 12}, {0, 2, 4}},
1231 :     {{13, 5}, {0, 3, 1}},
1232 :     {{35, 9}, {0, 3, 2}},
1233 :     {{13, 10}, {0, 3, 3}},
1234 :     {{12, 5}, {0, 4, 1}},
1235 :     {{34, 9}, {0, 4, 2}},
1236 :     {{82, 12}, {0, 4, 3}},
1237 :     {{11, 5}, {0, 5, 1}},
1238 :     {{12, 10}, {0, 5, 2}},
1239 :     {{83, 12}, {0, 5, 3}},
1240 :     {{19, 6}, {0, 6, 1}},
1241 :     {{11, 10}, {0, 6, 2}},
1242 :     {{84, 12}, {0, 6, 3}},
1243 :     {{18, 6}, {0, 7, 1}},
1244 :     {{10, 10}, {0, 7, 2}},
1245 :     {{17, 6}, {0, 8, 1}},
1246 :     {{ 9, 10}, {0, 8, 2}},
1247 :     {{16, 6}, {0, 9, 1}},
1248 :     {{ 8, 10}, {0, 9, 2}},
1249 :     {{22, 7}, {0, 10, 1}},
1250 :     {{85, 12}, {0, 10, 2}},
1251 :     {{21, 7}, {0, 11, 1}},
1252 :     {{20, 7}, {0, 12, 1}},
1253 :     {{28, 8}, {0, 13, 1}},
1254 :     {{27, 8}, {0, 14, 1}},
1255 :     {{33, 9}, {0, 15, 1}},
1256 :     {{32, 9}, {0, 16, 1}},
1257 :     {{31, 9}, {0, 17, 1}},
1258 :     {{30, 9}, {0, 18, 1}},
1259 :     {{29, 9}, {0, 19, 1}},
1260 :     {{28, 9}, {0, 20, 1}},
1261 :     {{27, 9}, {0, 21, 1}},
1262 :     {{26, 9}, {0, 22, 1}},
1263 :     {{34, 11}, {0, 23, 1}},
1264 :     {{35, 11}, {0, 24, 1}},
1265 :     {{86, 12}, {0, 25, 1}},
1266 :     {{87, 12}, {0, 26, 1}},
1267 :     {{ 7, 4}, {1, 0, 1}},
1268 :     {{25, 9}, {1, 0, 2}},
1269 :     {{ 5, 11}, {1, 0, 3}},
1270 :     {{15, 6}, {1, 1, 1}},
1271 :     {{ 4, 11}, {1, 1, 2}},
1272 :     {{14, 6}, {1, 2, 1}},
1273 :     {{13, 6}, {1, 3, 1}},
1274 :     {{12, 6}, {1, 4, 1}},
1275 :     {{19, 7}, {1, 5, 1}},
1276 :     {{18, 7}, {1, 6, 1}},
1277 :     {{17, 7}, {1, 7, 1}},
1278 :     {{16, 7}, {1, 8, 1}},
1279 :     {{26, 8}, {1, 9, 1}},
1280 :     {{25, 8}, {1, 10, 1}},
1281 :     {{24, 8}, {1, 11, 1}},
1282 :     {{23, 8}, {1, 12, 1}},
1283 :     {{22, 8}, {1, 13, 1}},
1284 :     {{21, 8}, {1, 14, 1}},
1285 :     {{20, 8}, {1, 15, 1}},
1286 :     {{19, 8}, {1, 16, 1}},
1287 :     {{24, 9}, {1, 17, 1}},
1288 :     {{23, 9}, {1, 18, 1}},
1289 :     {{22, 9}, {1, 19, 1}},
1290 :     {{21, 9}, {1, 20, 1}},
1291 :     {{20, 9}, {1, 21, 1}},
1292 :     {{19, 9}, {1, 22, 1}},
1293 :     {{18, 9}, {1, 23, 1}},
1294 :     {{17, 9}, {1, 24, 1}},
1295 :     {{ 7, 10}, {1, 25, 1}},
1296 :     {{ 6, 10}, {1, 26, 1}},
1297 :     {{ 5, 10}, {1, 27, 1}},
1298 :     {{ 4, 10}, {1, 28, 1}},
1299 :     {{36, 11}, {1, 29, 1}},
1300 :     {{37, 11}, {1, 30, 1}},
1301 :     {{38, 11}, {1, 31, 1}},
1302 :     {{39, 11}, {1, 32, 1}},
1303 :     {{88, 12}, {1, 33, 1}},
1304 :     {{89, 12}, {1, 34, 1}},
1305 :     {{90, 12}, {1, 35, 1}},
1306 :     {{91, 12}, {1, 36, 1}},
1307 :     {{92, 12}, {1, 37, 1}},
1308 :     {{93, 12}, {1, 38, 1}},
1309 :     {{94, 12}, {1, 39, 1}},
1310 :     {{95, 12}, {1, 40, 1}}
1311 :     },
1312 :     /* intra = 1 */
1313 :     {
1314 :     {{ 2, 2}, {0, 0, 1}},
1315 :     {{15, 4}, {0, 0, 3}},
1316 :     {{21, 6}, {0, 0, 6}},
1317 :     {{23, 7}, {0, 0, 9}},
1318 :     {{31, 8}, {0, 0, 10}},
1319 :     {{37, 9}, {0, 0, 13}},
1320 :     {{36, 9}, {0, 0, 14}},
1321 :     {{33, 10}, {0, 0, 17}},
1322 :     {{32, 10}, {0, 0, 18}},
1323 :     {{ 7, 11}, {0, 0, 21}},
1324 :     {{ 6, 11}, {0, 0, 22}},
1325 :     {{32, 11}, {0, 0, 23}},
1326 :     {{ 6, 3}, {0, 0, 2}},
1327 :     {{20, 6}, {0, 1, 2}},
1328 :     {{30, 8}, {0, 0, 11}},
1329 :     {{15, 10}, {0, 0, 19}},
1330 :     {{33, 11}, {0, 0, 24}},
1331 :     {{80, 12}, {0, 0, 25}},
1332 :     {{14, 4}, {0, 1, 1}},
1333 :     {{29, 8}, {0, 0, 12}},
1334 :     {{14, 10}, {0, 0, 20}},
1335 :     {{81, 12}, {0, 0, 26}},
1336 :     {{13, 5}, {0, 0, 4}},
1337 :     {{35, 9}, {0, 0, 15}},
1338 :     {{13, 10}, {0, 1, 7}},
1339 :     {{12, 5}, {0, 0, 5}},
1340 :     {{34, 9}, {0, 4, 2}},
1341 :     {{82, 12}, {0, 0, 27}},
1342 :     {{11, 5}, {0, 2, 1}},
1343 :     {{12, 10}, {0, 2, 4}},
1344 :     {{83, 12}, {0, 1, 9}},
1345 :     {{19, 6}, {0, 0, 7}},
1346 :     {{11, 10}, {0, 3, 4}},
1347 :     {{84, 12}, {0, 6, 3}},
1348 :     {{18, 6}, {0, 0, 8}},
1349 :     {{10, 10}, {0, 4, 3}},
1350 :     {{17, 6}, {0, 3, 1}},
1351 :     {{ 9, 10}, {0, 8, 2}},
1352 :     {{16, 6}, {0, 4, 1}},
1353 :     {{ 8, 10}, {0, 5, 3}},
1354 :     {{22, 7}, {0, 1, 3}},
1355 :     {{85, 12}, {0, 1, 10}},
1356 :     {{21, 7}, {0, 2, 2}},
1357 :     {{20, 7}, {0, 7, 1}},
1358 :     {{28, 8}, {0, 1, 4}},
1359 :     {{27, 8}, {0, 3, 2}},
1360 :     {{33, 9}, {0, 0, 16}},
1361 :     {{32, 9}, {0, 1, 5}},
1362 :     {{31, 9}, {0, 1, 6}},
1363 :     {{30, 9}, {0, 2, 3}},
1364 :     {{29, 9}, {0, 3, 3}},
1365 :     {{28, 9}, {0, 5, 2}},
1366 :     {{27, 9}, {0, 6, 2}},
1367 :     {{26, 9}, {0, 7, 2}},
1368 :     {{34, 11}, {0, 1, 8}},
1369 :     {{35, 11}, {0, 9, 2}},
1370 :     {{86, 12}, {0, 2, 5}},
1371 :     {{87, 12}, {0, 7, 3}},
1372 :     {{ 7, 4}, {1, 0, 1}},
1373 :     {{25, 9}, {0, 11, 1}},
1374 :     {{ 5, 11}, {1, 0, 6}},
1375 :     {{15, 6}, {1, 1, 1}},
1376 :     {{ 4, 11}, {1, 0, 7}},
1377 :     {{14, 6}, {1, 2, 1}},
1378 :     {{13, 6}, {0, 5, 1}},
1379 :     {{12, 6}, {1, 0, 2}},
1380 :     {{19, 7}, {1, 5, 1}},
1381 :     {{18, 7}, {0, 6, 1}},
1382 :     {{17, 7}, {1, 3, 1}},
1383 :     {{16, 7}, {1, 4, 1}},
1384 :     {{26, 8}, {1, 9, 1}},
1385 :     {{25, 8}, {0, 8, 1}},
1386 :     {{24, 8}, {0, 9, 1}},
1387 :     {{23, 8}, {0, 10, 1}},
1388 :     {{22, 8}, {1, 0, 3}},
1389 :     {{21, 8}, {1, 6, 1}},
1390 :     {{20, 8}, {1, 7, 1}},
1391 :     {{19, 8}, {1, 8, 1}},
1392 :     {{24, 9}, {0, 12, 1}},
1393 :     {{23, 9}, {1, 0, 4}},
1394 :     {{22, 9}, {1, 1, 2}},
1395 :     {{21, 9}, {1, 10, 1}},
1396 :     {{20, 9}, {1, 11, 1}},
1397 :     {{19, 9}, {1, 12, 1}},
1398 :     {{18, 9}, {1, 13, 1}},
1399 :     {{17, 9}, {1, 14, 1}},
1400 :     {{ 7, 10}, {0, 13, 1}},
1401 :     {{ 6, 10}, {1, 0, 5}},
1402 :     {{ 5, 10}, {1, 1, 3}},
1403 :     {{ 4, 10}, {1, 2, 2}},
1404 :     {{36, 11}, {1, 3, 2}},
1405 :     {{37, 11}, {1, 4, 2}},
1406 :     {{38, 11}, {1, 15, 1}},
1407 :     {{39, 11}, {1, 16, 1}},
1408 :     {{88, 12}, {0, 14, 1}},
1409 :     {{89, 12}, {1, 0, 8}},
1410 :     {{90, 12}, {1, 5, 2}},
1411 :     {{91, 12}, {1, 6, 2}},
1412 :     {{92, 12}, {1, 17, 1}},
1413 :     {{93, 12}, {1, 18, 1}},
1414 :     {{94, 12}, {1, 19, 1}},
1415 :     {{95, 12}, {1, 20, 1}}
1416 :     }
1417 :     };
1418 :    
1419 :     /* constants taken from momusys/vm_common/inlcude/max_level.h */
1420 :     uint8_t const max_level[2][2][64] = {
1421 :     {
1422 :     /* intra = 0, last = 0 */
1423 :     {
1424 :     12, 6, 4, 3, 3, 3, 3, 2,
1425 :     2, 2, 2, 1, 1, 1, 1, 1,
1426 :     1, 1, 1, 1, 1, 1, 1, 1,
1427 :     1, 1, 1, 0, 0, 0, 0, 0,
1428 :     0, 0, 0, 0, 0, 0, 0, 0,
1429 :     0, 0, 0, 0, 0, 0, 0, 0,
1430 :     0, 0, 0, 0, 0, 0, 0, 0,
1431 :     0, 0, 0, 0, 0, 0, 0, 0
1432 :     },
1433 :     /* intra = 0, last = 1 */
1434 :     {
1435 :     3, 2, 1, 1, 1, 1, 1, 1,
1436 :     1, 1, 1, 1, 1, 1, 1, 1,
1437 :     1, 1, 1, 1, 1, 1, 1, 1,
1438 :     1, 1, 1, 1, 1, 1, 1, 1,
1439 :     1, 1, 1, 1, 1, 1, 1, 1,
1440 :     1, 0, 0, 0, 0, 0, 0, 0,
1441 :     0, 0, 0, 0, 0, 0, 0, 0,
1442 :     0, 0, 0, 0, 0, 0, 0, 0
1443 :     }
1444 :     },
1445 :     {
1446 :     /* intra = 1, last = 0 */
1447 :     {
1448 :     27, 10, 5, 4, 3, 3, 3, 3,
1449 :     2, 2, 1, 1, 1, 1, 1, 0,
1450 :     0, 0, 0, 0, 0, 0, 0, 0,
1451 :     0, 0, 0, 0, 0, 0, 0, 0,
1452 :     0, 0, 0, 0, 0, 0, 0, 0,
1453 :     0, 0, 0, 0, 0, 0, 0, 0,
1454 :     0, 0, 0, 0, 0, 0, 0, 0,
1455 :     0, 0, 0, 0, 0, 0, 0, 0
1456 :     },
1457 :     /* intra = 1, last = 1 */
1458 :     {
1459 :     8, 3, 2, 2, 2, 2, 2, 1,
1460 :     1, 1, 1, 1, 1, 1, 1, 1,
1461 :     1, 1, 1, 1, 1, 0, 0, 0,
1462 :     0, 0, 0, 0, 0, 0, 0, 0,
1463 :     0, 0, 0, 0, 0, 0, 0, 0,
1464 :     0, 0, 0, 0, 0, 0, 0, 0,
1465 :     0, 0, 0, 0, 0, 0, 0, 0,
1466 :     0, 0, 0, 0, 0, 0, 0, 0
1467 :     }
1468 :     }
1469 :     };
1470 :    
1471 :     uint8_t const max_run[2][2][64] = {
1472 :     {
1473 :     /* intra = 0, last = 0 */
1474 :     {
1475 :     0, 26, 10, 6, 2, 1, 1, 0,
1476 :     0, 0, 0, 0, 0, 0, 0, 0,
1477 :     0, 0, 0, 0, 0, 0, 0, 0,
1478 :     0, 0, 0, 0, 0, 0, 0, 0,
1479 :     0, 0, 0, 0, 0, 0, 0, 0,
1480 :     0, 0, 0, 0, 0, 0, 0, 0,
1481 :     0, 0, 0, 0, 0, 0, 0, 0,
1482 :     0, 0, 0, 0, 0, 0, 0, 0,
1483 :     },
1484 :     /* intra = 0, last = 1 */
1485 : edgomez 1.46 {
1486 : edgomez 1.43 0, 40, 1, 0, 0, 0, 0, 0,
1487 :     0, 0, 0, 0, 0, 0, 0, 0,
1488 :     0, 0, 0, 0, 0, 0, 0, 0,
1489 :     0, 0, 0, 0, 0, 0, 0, 0,
1490 :     0, 0, 0, 0, 0, 0, 0, 0,
1491 :     0, 0, 0, 0, 0, 0, 0, 0,
1492 :     0, 0, 0, 0, 0, 0, 0, 0,
1493 :     0, 0, 0, 0, 0, 0, 0, 0,
1494 :     }
1495 :     },
1496 :     {
1497 :     /* intra = 1, last = 0 */
1498 :     {
1499 :     0, 14, 9, 7, 3, 2, 1, 1,
1500 :     1, 1, 1, 0, 0, 0, 0, 0,
1501 :     0, 0, 0, 0, 0, 0, 0, 0,
1502 :     0, 0, 0, 0, 0, 0, 0, 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 :     },
1508 :     /* intra = 1, last = 1 */
1509 :     {
1510 :     0, 20, 6, 1, 0, 0, 0, 0,
1511 :     0, 0, 0, 0, 0, 0, 0, 0,
1512 :     0, 0, 0, 0, 0, 0, 0, 0,
1513 :     0, 0, 0, 0, 0, 0, 0, 0,
1514 :     0, 0, 0, 0, 0, 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 :     }
1519 :     }
1520 :     };
1521 :    
1522 :     /******************************************************************
1523 :     * encoder tables *
1524 :     ******************************************************************/
1525 :    
1526 :     VLC sprite_trajectory_code[32768];
1527 :    
1528 :     VLC sprite_trajectory_len[15] = {
1529 : edgomez 1.46 { 0x00 , 2},
1530 :     { 0x02 , 3}, { 0x03, 3}, { 0x04, 3}, { 0x05, 3}, { 0x06, 3},
1531 :     { 0x0E , 4}, { 0x1E, 5}, { 0x3E, 6}, { 0x7E, 7}, { 0xFE, 8},
1532 : edgomez 1.43 { 0x1FE, 9}, {0x3FE,10}, {0x7FE,11}, {0xFFE,12} };
1533 :    
1534 :    
1535 :     /* DCT coefficients. Four tables, two for last = 0, two for last = 1.
1536 :     the sign bit must be added afterwards. */
1537 :    
1538 :     /* MCBPC Indexing by cbpc in first two bits, mode in last two.
1539 :     CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10.
1540 :     Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */
1541 :    
1542 :     VLC mcbpc_intra_tab[15] = {
1543 :     {0x01, 9}, {0x01, 1}, {0x01, 4}, {0x00, 0},
1544 :     {0x00, 0}, {0x01, 3}, {0x01, 6}, {0x00, 0},
1545 :     {0x00, 0}, {0x02, 3}, {0x02, 6}, {0x00, 0},
1546 :     {0x00, 0}, {0x03, 3}, {0x03, 6}
1547 :     };
1548 :    
1549 :     /* MCBPC inter.
1550 :     Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */
1551 :    
1552 :     VLC mcbpc_inter_tab[29] = {
1553 :     {1, 1}, {3, 3}, {2, 3}, {3, 5}, {4, 6}, {1, 9}, {0, 0}, {0, 0},
1554 :     {3, 4}, {7, 7}, {5, 7}, {4, 8}, {4, 9}, {0, 0}, {0, 0}, {0, 0},
1555 :     {2, 4}, {6, 7}, {4, 7}, {3, 8}, {3, 9}, {0, 0}, {0, 0}, {0, 0},
1556 :     {5, 6}, {5, 9}, {5, 8}, {3, 7}, {2, 9}
1557 :     };
1558 :    
1559 : chl 1.45 const VLC xvid_cbpy_tab[16] = {
1560 : edgomez 1.43 {3, 4}, {5, 5}, {4, 5}, {9, 4}, {3, 5}, {7, 4}, {2, 6}, {11, 4},
1561 :     {2, 5}, {3, 6}, {5, 4}, {10, 4}, {4, 4}, {8, 4}, {6, 4}, {3, 2}
1562 :     };
1563 :    
1564 :     const VLC dcy_tab[511] = {
1565 :     {0x100, 15}, {0x101, 15}, {0x102, 15}, {0x103, 15},
1566 :     {0x104, 15}, {0x105, 15}, {0x106, 15}, {0x107, 15},
1567 :     {0x108, 15}, {0x109, 15}, {0x10a, 15}, {0x10b, 15},
1568 :     {0x10c, 15}, {0x10d, 15}, {0x10e, 15}, {0x10f, 15},
1569 :     {0x110, 15}, {0x111, 15}, {0x112, 15}, {0x113, 15},
1570 :     {0x114, 15}, {0x115, 15}, {0x116, 15}, {0x117, 15},
1571 :     {0x118, 15}, {0x119, 15}, {0x11a, 15}, {0x11b, 15},
1572 :     {0x11c, 15}, {0x11d, 15}, {0x11e, 15}, {0x11f, 15},
1573 :     {0x120, 15}, {0x121, 15}, {0x122, 15}, {0x123, 15},
1574 :     {0x124, 15}, {0x125, 15}, {0x126, 15}, {0x127, 15},
1575 :     {0x128, 15}, {0x129, 15}, {0x12a, 15}, {0x12b, 15},
1576 :     {0x12c, 15}, {0x12d, 15}, {0x12e, 15}, {0x12f, 15},
1577 :     {0x130, 15}, {0x131, 15}, {0x132, 15}, {0x133, 15},
1578 :     {0x134, 15}, {0x135, 15}, {0x136, 15}, {0x137, 15},
1579 :     {0x138, 15}, {0x139, 15}, {0x13a, 15}, {0x13b, 15},
1580 :     {0x13c, 15}, {0x13d, 15}, {0x13e, 15}, {0x13f, 15},
1581 :     {0x140, 15}, {0x141, 15}, {0x142, 15}, {0x143, 15},
1582 :     {0x144, 15}, {0x145, 15}, {0x146, 15}, {0x147, 15},
1583 :     {0x148, 15}, {0x149, 15}, {0x14a, 15}, {0x14b, 15},
1584 :     {0x14c, 15}, {0x14d, 15}, {0x14e, 15}, {0x14f, 15},
1585 :     {0x150, 15}, {0x151, 15}, {0x152, 15}, {0x153, 15},
1586 :     {0x154, 15}, {0x155, 15}, {0x156, 15}, {0x157, 15},
1587 :     {0x158, 15}, {0x159, 15}, {0x15a, 15}, {0x15b, 15},
1588 :     {0x15c, 15}, {0x15d, 15}, {0x15e, 15}, {0x15f, 15},
1589 :     {0x160, 15}, {0x161, 15}, {0x162, 15}, {0x163, 15},
1590 :     {0x164, 15}, {0x165, 15}, {0x166, 15}, {0x167, 15},
1591 :     {0x168, 15}, {0x169, 15}, {0x16a, 15}, {0x16b, 15},
1592 :     {0x16c, 15}, {0x16d, 15}, {0x16e, 15}, {0x16f, 15},
1593 :     {0x170, 15}, {0x171, 15}, {0x172, 15}, {0x173, 15},
1594 :     {0x174, 15}, {0x175, 15}, {0x176, 15}, {0x177, 15},
1595 :     {0x178, 15}, {0x179, 15}, {0x17a, 15}, {0x17b, 15},
1596 :     {0x17c, 15}, {0x17d, 15}, {0x17e, 15}, {0x17f, 15},
1597 :     {0x80, 13}, {0x81, 13}, {0x82, 13}, {0x83, 13},
1598 :     {0x84, 13}, {0x85, 13}, {0x86, 13}, {0x87, 13},
1599 :     {0x88, 13}, {0x89, 13}, {0x8a, 13}, {0x8b, 13},
1600 :     {0x8c, 13}, {0x8d, 13}, {0x8e, 13}, {0x8f, 13},
1601 :     {0x90, 13}, {0x91, 13}, {0x92, 13}, {0x93, 13},
1602 :     {0x94, 13}, {0x95, 13}, {0x96, 13}, {0x97, 13},
1603 :     {0x98, 13}, {0x99, 13}, {0x9a, 13}, {0x9b, 13},
1604 :     {0x9c, 13}, {0x9d, 13}, {0x9e, 13}, {0x9f, 13},
1605 :     {0xa0, 13}, {0xa1, 13}, {0xa2, 13}, {0xa3, 13},
1606 :     {0xa4, 13}, {0xa5, 13}, {0xa6, 13}, {0xa7, 13},
1607 :     {0xa8, 13}, {0xa9, 13}, {0xaa, 13}, {0xab, 13},
1608 :     {0xac, 13}, {0xad, 13}, {0xae, 13}, {0xaf, 13},
1609 :     {0xb0, 13}, {0xb1, 13}, {0xb2, 13}, {0xb3, 13},
1610 :     {0xb4, 13}, {0xb5, 13}, {0xb6, 13}, {0xb7, 13},
1611 :     {0xb8, 13}, {0xb9, 13}, {0xba, 13}, {0xbb, 13},
1612 :     {0xbc, 13}, {0xbd, 13}, {0xbe, 13}, {0xbf, 13},
1613 :     {0x40, 11}, {0x41, 11}, {0x42, 11}, {0x43, 11},
1614 :     {0x44, 11}, {0x45, 11}, {0x46, 11}, {0x47, 11},
1615 :     {0x48, 11}, {0x49, 11}, {0x4a, 11}, {0x4b, 11},
1616 :     {0x4c, 11}, {0x4d, 11}, {0x4e, 11}, {0x4f, 11},
1617 :     {0x50, 11}, {0x51, 11}, {0x52, 11}, {0x53, 11},
1618 :     {0x54, 11}, {0x55, 11}, {0x56, 11}, {0x57, 11},
1619 :     {0x58, 11}, {0x59, 11}, {0x5a, 11}, {0x5b, 11},
1620 :     {0x5c, 11}, {0x5d, 11}, {0x5e, 11}, {0x5f, 11},
1621 :     {0x20, 9}, {0x21, 9}, {0x22, 9}, {0x23, 9},
1622 :     {0x24, 9}, {0x25, 9}, {0x26, 9}, {0x27, 9},
1623 :     {0x28, 9}, {0x29, 9}, {0x2a, 9}, {0x2b, 9},
1624 :     {0x2c, 9}, {0x2d, 9}, {0x2e, 9}, {0x2f, 9},
1625 :     {0x10, 7}, {0x11, 7}, {0x12, 7}, {0x13, 7},
1626 :     {0x14, 7}, {0x15, 7}, {0x16, 7}, {0x17, 7},
1627 :     {0x10, 6}, {0x11, 6}, {0x12, 6}, {0x13, 6},
1628 :     {0x08, 4}, {0x09, 4}, {0x06, 3}, {0x03, 3},
1629 :     {0x07, 3}, {0x0a, 4}, {0x0b, 4}, {0x14, 6},
1630 :     {0x15, 6}, {0x16, 6}, {0x17, 6}, {0x18, 7},
1631 :     {0x19, 7}, {0x1a, 7}, {0x1b, 7}, {0x1c, 7},
1632 :     {0x1d, 7}, {0x1e, 7}, {0x1f, 7}, {0x30, 9},
1633 :     {0x31, 9}, {0x32, 9}, {0x33, 9}, {0x34, 9},
1634 :     {0x35, 9}, {0x36, 9}, {0x37, 9}, {0x38, 9},
1635 :     {0x39, 9}, {0x3a, 9}, {0x3b, 9}, {0x3c, 9},
1636 :     {0x3d, 9}, {0x3e, 9}, {0x3f, 9}, {0x60, 11},
1637 :     {0x61, 11}, {0x62, 11}, {0x63, 11}, {0x64, 11},
1638 :     {0x65, 11}, {0x66, 11}, {0x67, 11}, {0x68, 11},
1639 :     {0x69, 11}, {0x6a, 11}, {0x6b, 11}, {0x6c, 11},
1640 :     {0x6d, 11}, {0x6e, 11}, {0x6f, 11}, {0x70, 11},
1641 :     {0x71, 11}, {0x72, 11}, {0x73, 11}, {0x74, 11},
1642 :     {0x75, 11}, {0x76, 11}, {0x77, 11}, {0x78, 11},
1643 :     {0x79, 11}, {0x7a, 11}, {0x7b, 11}, {0x7c, 11},
1644 :     {0x7d, 11}, {0x7e, 11}, {0x7f, 11}, {0xc0, 13},
1645 :     {0xc1, 13}, {0xc2, 13}, {0xc3, 13}, {0xc4, 13},
1646 :     {0xc5, 13}, {0xc6, 13}, {0xc7, 13}, {0xc8, 13},
1647 :     {0xc9, 13}, {0xca, 13}, {0xcb, 13}, {0xcc, 13},
1648 :     {0xcd, 13}, {0xce, 13}, {0xcf, 13}, {0xd0, 13},
1649 :     {0xd1, 13}, {0xd2, 13}, {0xd3, 13}, {0xd4, 13},
1650 :     {0xd5, 13}, {0xd6, 13}, {0xd7, 13}, {0xd8, 13},
1651 :     {0xd9, 13}, {0xda, 13}, {0xdb, 13}, {0xdc, 13},
1652 :     {0xdd, 13}, {0xde, 13}, {0xdf, 13}, {0xe0, 13},
1653 :     {0xe1, 13}, {0xe2, 13}, {0xe3, 13}, {0xe4, 13},
1654 :     {0xe5, 13}, {0xe6, 13}, {0xe7, 13}, {0xe8, 13},
1655 :     {0xe9, 13}, {0xea, 13}, {0xeb, 13}, {0xec, 13},
1656 :     {0xed, 13}, {0xee, 13}, {0xef, 13}, {0xf0, 13},
1657 :     {0xf1, 13}, {0xf2, 13}, {0xf3, 13}, {0xf4, 13},
1658 :     {0xf5, 13}, {0xf6, 13}, {0xf7, 13}, {0xf8, 13},
1659 :     {0xf9, 13}, {0xfa, 13}, {0xfb, 13}, {0xfc, 13},
1660 :     {0xfd, 13}, {0xfe, 13}, {0xff, 13}, {0x180, 15},
1661 :     {0x181, 15}, {0x182, 15}, {0x183, 15}, {0x184, 15},
1662 :     {0x185, 15}, {0x186, 15}, {0x187, 15}, {0x188, 15},
1663 :     {0x189, 15}, {0x18a, 15}, {0x18b, 15}, {0x18c, 15},
1664 :     {0x18d, 15}, {0x18e, 15}, {0x18f, 15}, {0x190, 15},
1665 :     {0x191, 15}, {0x192, 15}, {0x193, 15}, {0x194, 15},
1666 :     {0x195, 15}, {0x196, 15}, {0x197, 15}, {0x198, 15},
1667 :     {0x199, 15}, {0x19a, 15}, {0x19b, 15}, {0x19c, 15},
1668 :     {0x19d, 15}, {0x19e, 15}, {0x19f, 15}, {0x1a0, 15},
1669 :     {0x1a1, 15}, {0x1a2, 15}, {0x1a3, 15}, {0x1a4, 15},
1670 :     {0x1a5, 15}, {0x1a6, 15}, {0x1a7, 15}, {0x1a8, 15},
1671 :     {0x1a9, 15}, {0x1aa, 15}, {0x1ab, 15}, {0x1ac, 15},
1672 :     {0x1ad, 15}, {0x1ae, 15}, {0x1af, 15}, {0x1b0, 15},
1673 :     {0x1b1, 15}, {0x1b2, 15}, {0x1b3, 15}, {0x1b4, 15},
1674 :     {0x1b5, 15}, {0x1b6, 15}, {0x1b7, 15}, {0x1b8, 15},
1675 :     {0x1b9, 15}, {0x1ba, 15}, {0x1bb, 15}, {0x1bc, 15},
1676 :     {0x1bd, 15}, {0x1be, 15}, {0x1bf, 15}, {0x1c0, 15},
1677 :     {0x1c1, 15}, {0x1c2, 15}, {0x1c3, 15}, {0x1c4, 15},
1678 :     {0x1c5, 15}, {0x1c6, 15}, {0x1c7, 15}, {0x1c8, 15},
1679 :     {0x1c9, 15}, {0x1ca, 15}, {0x1cb, 15}, {0x1cc, 15},
1680 :     {0x1cd, 15}, {0x1ce, 15}, {0x1cf, 15}, {0x1d0, 15},
1681 :     {0x1d1, 15}, {0x1d2, 15}, {0x1d3, 15}, {0x1d4, 15},
1682 :     {0x1d5, 15}, {0x1d6, 15}, {0x1d7, 15}, {0x1d8, 15},
1683 :     {0x1d9, 15}, {0x1da, 15}, {0x1db, 15}, {0x1dc, 15},
1684 :     {0x1dd, 15}, {0x1de, 15}, {0x1df, 15}, {0x1e0, 15},
1685 :     {0x1e1, 15}, {0x1e2, 15}, {0x1e3, 15}, {0x1e4, 15},
1686 :     {0x1e5, 15}, {0x1e6, 15}, {0x1e7, 15}, {0x1e8, 15},
1687 :     {0x1e9, 15}, {0x1ea, 15}, {0x1eb, 15}, {0x1ec, 15},
1688 :     {0x1ed, 15}, {0x1ee, 15}, {0x1ef, 15}, {0x1f0, 15},
1689 :     {0x1f1, 15}, {0x1f2, 15}, {0x1f3, 15}, {0x1f4, 15},
1690 :     {0x1f5, 15}, {0x1f6, 15}, {0x1f7, 15}, {0x1f8, 15},
1691 :     {0x1f9, 15}, {0x1fa, 15}, {0x1fb, 15}, {0x1fc, 15},
1692 :     {0x1fd, 15}, {0x1fe, 15}, {0x1ff, 15},
1693 :     };
1694 :    
1695 :     const VLC dcc_tab[511] = {
1696 :     {0x100, 16}, {0x101, 16}, {0x102, 16}, {0x103, 16},
1697 :     {0x104, 16}, {0x105, 16}, {0x106, 16}, {0x107, 16},
1698 :     {0x108, 16}, {0x109, 16}, {0x10a, 16}, {0x10b, 16},
1699 :     {0x10c, 16}, {0x10d, 16}, {0x10e, 16}, {0x10f, 16},
1700 :     {0x110, 16}, {0x111, 16}, {0x112, 16}, {0x113, 16},
1701 :     {0x114, 16}, {0x115, 16}, {0x116, 16}, {0x117, 16},
1702 :     {0x118, 16}, {0x119, 16}, {0x11a, 16}, {0x11b, 16},
1703 :     {0x11c, 16}, {0x11d, 16}, {0x11e, 16}, {0x11f, 16},
1704 :     {0x120, 16}, {0x121, 16}, {0x122, 16}, {0x123, 16},
1705 :     {0x124, 16}, {0x125, 16}, {0x126, 16}, {0x127, 16},
1706 :     {0x128, 16}, {0x129, 16}, {0x12a, 16}, {0x12b, 16},
1707 :     {0x12c, 16}, {0x12d, 16}, {0x12e, 16}, {0x12f, 16},
1708 :     {0x130, 16}, {0x131, 16}, {0x132, 16}, {0x133, 16},
1709 :     {0x134, 16}, {0x135, 16}, {0x136, 16}, {0x137, 16},
1710 :     {0x138, 16}, {0x139, 16}, {0x13a, 16}, {0x13b, 16},
1711 :     {0x13c, 16}, {0x13d, 16}, {0x13e, 16}, {0x13f, 16},
1712 :     {0x140, 16}, {0x141, 16}, {0x142, 16}, {0x143, 16},
1713 :     {0x144, 16}, {0x145, 16}, {0x146, 16}, {0x147, 16},
1714 :     {0x148, 16}, {0x149, 16}, {0x14a, 16}, {0x14b, 16},
1715 :     {0x14c, 16}, {0x14d, 16}, {0x14e, 16}, {0x14f, 16},
1716 :     {0x150, 16}, {0x151, 16}, {0x152, 16}, {0x153, 16},
1717 :     {0x154, 16}, {0x155, 16}, {0x156, 16}, {0x157, 16},
1718 :     {0x158, 16}, {0x159, 16}, {0x15a, 16}, {0x15b, 16},
1719 :     {0x15c, 16}, {0x15d, 16}, {0x15e, 16}, {0x15f, 16},
1720 :     {0x160, 16}, {0x161, 16}, {0x162, 16}, {0x163, 16},
1721 :     {0x164, 16}, {0x165, 16}, {0x166, 16}, {0x167, 16},
1722 :     {0x168, 16}, {0x169, 16}, {0x16a, 16}, {0x16b, 16},
1723 :     {0x16c, 16}, {0x16d, 16}, {0x16e, 16}, {0x16f, 16},
1724 :     {0x170, 16}, {0x171, 16}, {0x172, 16}, {0x173, 16},
1725 :     {0x174, 16}, {0x175, 16}, {0x176, 16}, {0x177, 16},
1726 :     {0x178, 16}, {0x179, 16}, {0x17a, 16}, {0x17b, 16},
1727 :     {0x17c, 16}, {0x17d, 16}, {0x17e, 16}, {0x17f, 16},
1728 :     {0x80, 14}, {0x81, 14}, {0x82, 14}, {0x83, 14},
1729 :     {0x84, 14}, {0x85, 14}, {0x86, 14}, {0x87, 14},
1730 :     {0x88, 14}, {0x89, 14}, {0x8a, 14}, {0x8b, 14},
1731 :     {0x8c, 14}, {0x8d, 14}, {0x8e, 14}, {0x8f, 14},
1732 :     {0x90, 14}, {0x91, 14}, {0x92, 14}, {0x93, 14},
1733 :     {0x94, 14}, {0x95, 14}, {0x96, 14}, {0x97, 14},
1734 :     {0x98, 14}, {0x99, 14}, {0x9a, 14}, {0x9b, 14},
1735 :     {0x9c, 14}, {0x9d, 14}, {0x9e, 14}, {0x9f, 14},
1736 :     {0xa0, 14}, {0xa1, 14}, {0xa2, 14}, {0xa3, 14},
1737 :     {0xa4, 14}, {0xa5, 14}, {0xa6, 14}, {0xa7, 14},
1738 :     {0xa8, 14}, {0xa9, 14}, {0xaa, 14}, {0xab, 14},
1739 :     {0xac, 14}, {0xad, 14}, {0xae, 14}, {0xaf, 14},
1740 :     {0xb0, 14}, {0xb1, 14}, {0xb2, 14}, {0xb3, 14},
1741 :     {0xb4, 14}, {0xb5, 14}, {0xb6, 14}, {0xb7, 14},
1742 :     {0xb8, 14}, {0xb9, 14}, {0xba, 14}, {0xbb, 14},
1743 :     {0xbc, 14}, {0xbd, 14}, {0xbe, 14}, {0xbf, 14},
1744 :     {0x40, 12}, {0x41, 12}, {0x42, 12}, {0x43, 12},
1745 :     {0x44, 12}, {0x45, 12}, {0x46, 12}, {0x47, 12},
1746 :     {0x48, 12}, {0x49, 12}, {0x4a, 12}, {0x4b, 12},
1747 :     {0x4c, 12}, {0x4d, 12}, {0x4e, 12}, {0x4f, 12},
1748 :     {0x50, 12}, {0x51, 12}, {0x52, 12}, {0x53, 12},
1749 :     {0x54, 12}, {0x55, 12}, {0x56, 12}, {0x57, 12},
1750 :     {0x58, 12}, {0x59, 12}, {0x5a, 12}, {0x5b, 12},
1751 :     {0x5c, 12}, {0x5d, 12}, {0x5e, 12}, {0x5f, 12},
1752 :     {0x20, 10}, {0x21, 10}, {0x22, 10}, {0x23, 10},
1753 :     {0x24, 10}, {0x25, 10}, {0x26, 10}, {0x27, 10},
1754 :     {0x28, 10}, {0x29, 10}, {0x2a, 10}, {0x2b, 10},
1755 :     {0x2c, 10}, {0x2d, 10}, {0x2e, 10}, {0x2f, 10},
1756 :     {0x10, 8}, {0x11, 8}, {0x12, 8}, {0x13, 8},
1757 :     {0x14, 8}, {0x15, 8}, {0x16, 8}, {0x17, 8},
1758 :     {0x08, 6}, {0x09, 6}, {0x0a, 6}, {0x0b, 6},
1759 :     {0x04, 4}, {0x05, 4}, {0x04, 3}, {0x03, 2},
1760 :     {0x05, 3}, {0x06, 4}, {0x07, 4}, {0x0c, 6},
1761 :     {0x0d, 6}, {0x0e, 6}, {0x0f, 6}, {0x18, 8},
1762 :     {0x19, 8}, {0x1a, 8}, {0x1b, 8}, {0x1c, 8},
1763 :     {0x1d, 8}, {0x1e, 8}, {0x1f, 8}, {0x30, 10},
1764 :     {0x31, 10}, {0x32, 10}, {0x33, 10}, {0x34, 10},
1765 :     {0x35, 10}, {0x36, 10}, {0x37, 10}, {0x38, 10},
1766 :     {0x39, 10}, {0x3a, 10}, {0x3b, 10}, {0x3c, 10},
1767 :     {0x3d, 10}, {0x3e, 10}, {0x3f, 10}, {0x60, 12},
1768 :     {0x61, 12}, {0x62, 12}, {0x63, 12}, {0x64, 12},
1769 :     {0x65, 12}, {0x66, 12}, {0x67, 12}, {0x68, 12},
1770 :     {0x69, 12}, {0x6a, 12}, {0x6b, 12}, {0x6c, 12},
1771 :     {0x6d, 12}, {0x6e, 12}, {0x6f, 12}, {0x70, 12},
1772 :     {0x71, 12}, {0x72, 12}, {0x73, 12}, {0x74, 12},
1773 :     {0x75, 12}, {0x76, 12}, {0x77, 12}, {0x78, 12},
1774 :     {0x79, 12}, {0x7a, 12}, {0x7b, 12}, {0x7c, 12},
1775 :     {0x7d, 12}, {0x7e, 12}, {0x7f, 12}, {0xc0, 14},
1776 :     {0xc1, 14}, {0xc2, 14}, {0xc3, 14}, {0xc4, 14},
1777 :     {0xc5, 14}, {0xc6, 14}, {0xc7, 14}, {0xc8, 14},
1778 :     {0xc9, 14}, {0xca, 14}, {0xcb, 14}, {0xcc, 14},
1779 :     {0xcd, 14}, {0xce, 14}, {0xcf, 14}, {0xd0, 14},
1780 :     {0xd1, 14}, {0xd2, 14}, {0xd3, 14}, {0xd4, 14},
1781 :     {0xd5, 14}, {0xd6, 14}, {0xd7, 14}, {0xd8, 14},
1782 :     {0xd9, 14}, {0xda, 14}, {0xdb, 14}, {0xdc, 14},
1783 :     {0xdd, 14}, {0xde, 14}, {0xdf, 14}, {0xe0, 14},
1784 :     {0xe1, 14}, {0xe2, 14}, {0xe3, 14}, {0xe4, 14},
1785 :     {0xe5, 14}, {0xe6, 14}, {0xe7, 14}, {0xe8, 14},
1786 :     {0xe9, 14}, {0xea, 14}, {0xeb, 14}, {0xec, 14},
1787 :     {0xed, 14}, {0xee, 14}, {0xef, 14}, {0xf0, 14},
1788 :     {0xf1, 14}, {0xf2, 14}, {0xf3, 14}, {0xf4, 14},
1789 :     {0xf5, 14}, {0xf6, 14}, {0xf7, 14}, {0xf8, 14},
1790 :     {0xf9, 14}, {0xfa, 14}, {0xfb, 14}, {0xfc, 14},
1791 :     {0xfd, 14}, {0xfe, 14}, {0xff, 14}, {0x180, 16},
1792 :     {0x181, 16}, {0x182, 16}, {0x183, 16}, {0x184, 16},
1793 :     {0x185, 16}, {0x186, 16}, {0x187, 16}, {0x188, 16},
1794 :     {0x189, 16}, {0x18a, 16}, {0x18b, 16}, {0x18c, 16},
1795 :     {0x18d, 16}, {0x18e, 16}, {0x18f, 16}, {0x190, 16},
1796 :     {0x191, 16}, {0x192, 16}, {0x193, 16}, {0x194, 16},
1797 :     {0x195, 16}, {0x196, 16}, {0x197, 16}, {0x198, 16},
1798 :     {0x199, 16}, {0x19a, 16}, {0x19b, 16}, {0x19c, 16},
1799 :     {0x19d, 16}, {0x19e, 16}, {0x19f, 16}, {0x1a0, 16},
1800 :     {0x1a1, 16}, {0x1a2, 16}, {0x1a3, 16}, {0x1a4, 16},
1801 :     {0x1a5, 16}, {0x1a6, 16}, {0x1a7, 16}, {0x1a8, 16},
1802 :     {0x1a9, 16}, {0x1aa, 16}, {0x1ab, 16}, {0x1ac, 16},
1803 :     {0x1ad, 16}, {0x1ae, 16}, {0x1af, 16}, {0x1b0, 16},
1804 :     {0x1b1, 16}, {0x1b2, 16}, {0x1b3, 16}, {0x1b4, 16},
1805 :     {0x1b5, 16}, {0x1b6, 16}, {0x1b7, 16}, {0x1b8, 16},
1806 :     {0x1b9, 16}, {0x1ba, 16}, {0x1bb, 16}, {0x1bc, 16},
1807 :     {0x1bd, 16}, {0x1be, 16}, {0x1bf, 16}, {0x1c0, 16},
1808 :     {0x1c1, 16}, {0x1c2, 16}, {0x1c3, 16}, {0x1c4, 16},
1809 :     {0x1c5, 16}, {0x1c6, 16}, {0x1c7, 16}, {0x1c8, 16},
1810 :     {0x1c9, 16}, {0x1ca, 16}, {0x1cb, 16}, {0x1cc, 16},
1811 :     {0x1cd, 16}, {0x1ce, 16}, {0x1cf, 16}, {0x1d0, 16},
1812 :     {0x1d1, 16}, {0x1d2, 16}, {0x1d3, 16}, {0x1d4, 16},
1813 :     {0x1d5, 16}, {0x1d6, 16}, {0x1d7, 16}, {0x1d8, 16},
1814 :     {0x1d9, 16}, {0x1da, 16}, {0x1db, 16}, {0x1dc, 16},
1815 :     {0x1dd, 16}, {0x1de, 16}, {0x1df, 16}, {0x1e0, 16},
1816 :     {0x1e1, 16}, {0x1e2, 16}, {0x1e3, 16}, {0x1e4, 16},
1817 :     {0x1e5, 16}, {0x1e6, 16}, {0x1e7, 16}, {0x1e8, 16},
1818 :     {0x1e9, 16}, {0x1ea, 16}, {0x1eb, 16}, {0x1ec, 16},
1819 :     {0x1ed, 16}, {0x1ee, 16}, {0x1ef, 16}, {0x1f0, 16},
1820 :     {0x1f1, 16}, {0x1f2, 16}, {0x1f3, 16}, {0x1f4, 16},
1821 :     {0x1f5, 16}, {0x1f6, 16}, {0x1f7, 16}, {0x1f8, 16},
1822 :     {0x1f9, 16}, {0x1fa, 16}, {0x1fb, 16}, {0x1fc, 16},
1823 :     {0x1fd, 16}, {0x1fe, 16}, {0x1ff, 16},
1824 :     };
1825 :    
1826 :    
1827 :     const VLC mb_motion_table[65] = {
1828 :     {0x05, 13}, {0x07, 13}, {0x05, 12}, {0x07, 12},
1829 :     {0x09, 12}, {0x0b, 12}, {0x0d, 12}, {0x0f, 12},
1830 :     {0x09, 11}, {0x0b, 11}, {0x0d, 11}, {0x0f, 11},
1831 :     {0x11, 11}, {0x13, 11}, {0x15, 11}, {0x17, 11},
1832 :     {0x19, 11}, {0x1b, 11}, {0x1d, 11}, {0x1f, 11},
1833 :     {0x21, 11}, {0x23, 11}, {0x13, 10}, {0x15, 10},
1834 :     {0x17, 10}, {0x07, 8}, {0x09, 8}, {0x0b, 8},
1835 :     {0x07, 7}, {0x03, 5}, {0x03, 4}, {0x03, 3},
1836 :     {0x01, 1}, {0x02, 3}, {0x02, 4}, {0x02, 5},
1837 :     {0x06, 7}, {0x0a, 8}, {0x08, 8}, {0x06, 8},
1838 :     {0x16, 10}, {0x14, 10}, {0x12, 10}, {0x22, 11},
1839 :     {0x20, 11}, {0x1e, 11}, {0x1c, 11}, {0x1a, 11},
1840 :     {0x18, 11}, {0x16, 11}, {0x14, 11}, {0x12, 11},
1841 :     {0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11},
1842 :     {0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12},
1843 :     {0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13},
1844 :     {0x04, 13}
1845 :     };
1846 :    
1847 :    
1848 :     /******************************************************************
1849 :     * decoder tables *
1850 :     ******************************************************************/
1851 :    
1852 :     VLC const mcbpc_intra_table[64] = {
1853 :     {-1, 0}, {20, 6}, {36, 6}, {52, 6}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
1854 :     {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3},
1855 :     {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3},
1856 :     {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3},
1857 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1858 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1859 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1860 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}
1861 :     };
1862 :    
1863 :     VLC const mcbpc_inter_table[257] = {
1864 :     {VLC_ERROR, 0}, {255, 9}, {52, 9}, {36, 9}, {20, 9}, {49, 9}, {35, 8}, {35, 8},
1865 :     {19, 8}, {19, 8}, {50, 8}, {50, 8}, {51, 7}, {51, 7}, {51, 7}, {51, 7},
1866 :     {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
1867 :     {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
1868 :     {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6},
1869 :     {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6},
1870 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1871 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1872 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1873 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1874 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1875 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1876 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1877 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1878 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1879 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1880 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1881 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1882 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1883 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1884 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1885 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1886 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1887 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1888 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1889 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1890 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1891 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1892 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1893 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1894 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1895 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1896 :     {0, 1}
1897 :     };
1898 :    
1899 :     VLC const cbpy_table[64] = {
1900 :     {-1, 0}, {-1, 0}, {6, 6}, {9, 6}, {8, 5}, {8, 5}, {4, 5}, {4, 5},
1901 :     {2, 5}, {2, 5}, {1, 5}, {1, 5}, {0, 4}, {0, 4}, {0, 4}, {0, 4},
1902 :     {12, 4}, {12, 4}, {12, 4}, {12, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4},
1903 :     {14, 4}, {14, 4}, {14, 4}, {14, 4}, {5, 4}, {5, 4}, {5, 4}, {5, 4},
1904 :     {13, 4}, {13, 4}, {13, 4}, {13, 4}, {3, 4}, {3, 4}, {3, 4}, {3, 4},
1905 :     {11, 4}, {11, 4}, {11, 4}, {11, 4}, {7, 4}, {7, 4}, {7, 4}, {7, 4},
1906 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2},
1907 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}
1908 :     };
1909 :    
1910 :     VLC const TMNMVtab0[] = {
1911 :     {3, 4}, {-3, 4}, {2, 3}, {2, 3}, {-2, 3}, {-2, 3}, {1, 2},
1912 :     {1, 2}, {1, 2}, {1, 2}, {-1, 2}, {-1, 2}, {-1, 2}, {-1, 2}
1913 :     };
1914 :    
1915 :     VLC const TMNMVtab1[] = {
1916 :     {12, 10}, {-12, 10}, {11, 10}, {-11, 10},
1917 :     {10, 9}, {10, 9}, {-10, 9}, {-10, 9},
1918 :     {9, 9}, {9, 9}, {-9, 9}, {-9, 9},
1919 :     {8, 9}, {8, 9}, {-8, 9}, {-8, 9},
1920 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1921 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1922 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1923 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1924 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1925 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1926 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1927 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1928 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1929 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1930 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1931 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1932 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1933 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1934 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1935 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1936 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1937 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1938 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
1939 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6}
1940 :     };
1941 :    
1942 :     VLC const TMNMVtab2[] = {
1943 :     {32, 12}, {-32, 12}, {31, 12}, {-31, 12},
1944 :     {30, 11}, {30, 11}, {-30, 11}, {-30, 11},
1945 :     {29, 11}, {29, 11}, {-29, 11}, {-29, 11},
1946 :     {28, 11}, {28, 11}, {-28, 11}, {-28, 11},
1947 :     {27, 11}, {27, 11}, {-27, 11}, {-27, 11},
1948 :     {26, 11}, {26, 11}, {-26, 11}, {-26, 11},
1949 :     {25, 11}, {25, 11}, {-25, 11}, {-25, 11},
1950 :     {24, 10}, {24, 10}, {24, 10}, {24, 10},
1951 :     {-24, 10}, {-24, 10}, {-24, 10}, {-24, 10},
1952 :     {23, 10}, {23, 10}, {23, 10}, {23, 10},
1953 :     {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10},
1954 :     {22, 10}, {22, 10}, {22, 10}, {22, 10},
1955 :     {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},
1956 :     {21, 10}, {21, 10}, {21, 10}, {21, 10},
1957 :     {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},
1958 :     {20, 10}, {20, 10}, {20, 10}, {20, 10},
1959 :     {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10},
1960 :     {19, 10}, {19, 10}, {19, 10}, {19, 10},
1961 :     {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},
1962 :     {18, 10}, {18, 10}, {18, 10}, {18, 10},
1963 :     {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10},
1964 :     {17, 10}, {17, 10}, {17, 10}, {17, 10},
1965 :     {-17, 10}, {-17, 10}, {-17, 10}, {-17, 10},
1966 :     {16, 10}, {16, 10}, {16, 10}, {16, 10},
1967 :     {-16, 10}, {-16, 10}, {-16, 10}, {-16, 10},
1968 :     {15, 10}, {15, 10}, {15, 10}, {15, 10},
1969 :     {-15, 10}, {-15, 10}, {-15, 10}, {-15, 10},
1970 :     {14, 10}, {14, 10}, {14, 10}, {14, 10},
1971 :     {-14, 10}, {-14, 10}, {-14, 10}, {-14, 10},
1972 :     {13, 10}, {13, 10}, {13, 10}, {13, 10},
1973 :     {-13, 10}, {-13, 10}, {-13, 10}, {-13, 10}
1974 :     };
1975 :    
1976 :     short const dc_threshold[] = {
1977 : edgomez 1.51 26708, 29545, 29472, 26223, 30580, 29281, 8293, 29545,
1978 :     25632, 29285, 30313, 25701, 26144, 28530, 8301, 26740,
1979 :     8293, 20039, 8277, 20551, 8268, 30296, 17513, 25376,
1980 :     25711, 25445, 10272, 11825, 11825, 10544, 2606, 28505,
1981 :     29301, 29472, 26223, 30580, 29281, 8293, 26980, 29811,
1982 :     26994, 30050, 28532, 8306, 24936, 8307, 28532, 26400,
1983 :     30313, 8293, 25441, 25955, 29555, 29728, 8303, 29801,
1984 :     8307, 28531, 29301, 25955, 25376, 25711, 11877, 10
1985 : edgomez 1.43 };
1986 :    
1987 :     VLC const dc_lum_tab[] = {
1988 :     {0, 0}, {4, 3}, {3, 3}, {0, 3},
1989 :     {2, 2}, {2, 2}, {1, 2}, {1, 2},
1990 :     };
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