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1 : edgomez 1382 /*****************************************************************************
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 1988 * $Id$
23 : edgomez 1382 *
24 :     ****************************************************************************/
25 : suxen_drol 118
26 : edgomez 851 #include <stdio.h>
27 : Isibaar 100 #include <stdlib.h>
28 : edgomez 1382 #include <string.h>
29 :    
30 : Isibaar 3 #include "../portab.h"
31 : edgomez 851 #include "../global.h"
32 : Isibaar 3 #include "bitstream.h"
33 :     #include "zigzag.h"
34 :     #include "vlc_codes.h"
35 : Isibaar 100 #include "mbcoding.h"
36 : Isibaar 3
37 :     #include "../utils/mbfunctions.h"
38 :    
39 : syskin 1773 #ifdef _DEBUG
40 :     # include "../motion/estimation.h"
41 :     # include "../motion/motion_inlines.h"
42 :     # include <assert.h>
43 :     #endif
44 :    
45 :    
46 : edgomez 764 #define LEVELOFFSET 32
47 :    
48 : edgomez 1537 /* Initialized once during xvid_global call
49 :     * RO access is thread safe */
50 : edgomez 764 static REVERSE_EVENT DCT3D[2][4096];
51 :     static VLC coeff_VLC[2][2][64][64];
52 : edgomez 451
53 : edgomez 851 /* not really MB related, but VLCs are only available here */
54 :     void bs_put_spritetrajectory(Bitstream * bs, const int val)
55 :     {
56 :     const int code = sprite_trajectory_code[val+16384].code;
57 :     const int len = sprite_trajectory_code[val+16384].len;
58 :     const int code2 = sprite_trajectory_len[len].code;
59 :     const int len2 = sprite_trajectory_len[len].len;
60 : edgomez 451
61 : edgomez 1382 #if 0
62 :     printf("GMC=%d Code/Len = %d / %d ",val, code,len);
63 :     printf("Code2 / Len2 = %d / %d \n",code2,len2);
64 :     #endif
65 : edgomez 851
66 :     BitstreamPutBits(bs, code2, len2);
67 :     if (len) BitstreamPutBits(bs, code, len);
68 :     }
69 :    
70 :     int bs_get_spritetrajectory(Bitstream * bs)
71 :     {
72 :     int i;
73 :     for (i = 0; i < 12; i++)
74 :     {
75 :     if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code)
76 :     {
77 :     BitstreamSkip(bs, sprite_trajectory_len[i].len);
78 :     return i;
79 :     }
80 :     }
81 :     return -1;
82 :     }
83 :    
84 : edgomez 195 void
85 :     init_vlc_tables(void)
86 : Isibaar 3 {
87 : edgomez 851 uint32_t i, j, k, intra, last, run, run_esc, level, level_esc, escape, escape_len, offset;
88 :     int32_t l;
89 : edgomez 78
90 : edgomez 764 for (intra = 0; intra < 2; intra++)
91 :     for (i = 0; i < 4096; i++)
92 :     DCT3D[intra][i].event.level = 0;
93 : edgomez 195
94 : edgomez 1382 for (intra = 0; intra < 2; intra++) {
95 :     for (last = 0; last < 2; last++) {
96 :     for (run = 0; run < 63 + last; run++) {
97 :     for (level = 0; level < (uint32_t)(32 << intra); level++) {
98 : edgomez 764 offset = !intra * LEVELOFFSET;
99 :     coeff_VLC[intra][last][level + offset][run].len = 128;
100 :     }
101 : edgomez 1382 }
102 : edgomez 764 }
103 : edgomez 1382 }
104 : Isibaar 3
105 : edgomez 1382 for (intra = 0; intra < 2; intra++) {
106 :     for (i = 0; i < 102; i++) {
107 : edgomez 764 offset = !intra * LEVELOFFSET;
108 : edgomez 1382
109 :     for (j = 0; j < (uint32_t)(1 << (12 - coeff_tab[intra][i].vlc.len)); j++) {
110 : edgomez 764 DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len;
111 :     DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event;
112 :     }
113 : edgomez 195
114 : 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
115 :     = coeff_tab[intra][i].vlc.code << 1;
116 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len
117 :     = coeff_tab[intra][i].vlc.len + 1;
118 : edgomez 1382
119 :     if (!intra) {
120 : edgomez 764 coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code
121 :     = (coeff_tab[intra][i].vlc.code << 1) | 1;
122 :     coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len
123 :     = coeff_tab[intra][i].vlc.len + 1;
124 :     }
125 :     }
126 : edgomez 1382 }
127 : edgomez 195
128 : edgomez 1382 for (intra = 0; intra < 2; intra++) {
129 :     for (last = 0; last < 2; last++) {
130 :     for (run = 0; run < 63 + last; run++) {
131 :     for (level = 1; level < (uint32_t)(32 << intra); level++) {
132 :    
133 : edgomez 766 if (level <= max_level[intra][last][run] && run <= max_run[intra][last][level])
134 :     continue;
135 :    
136 : edgomez 764 offset = !intra * LEVELOFFSET;
137 : edgomez 766 level_esc = level - max_level[intra][last][run];
138 :     run_esc = run - 1 - max_run[intra][last][level];
139 :    
140 : edgomez 1382 if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc]) {
141 : edgomez 766 escape = ESCAPE1;
142 :     escape_len = 7 + 1;
143 :     run_esc = run;
144 : edgomez 1382 } else {
145 :     if (run_esc <= max_run[intra][last][level] && level <= max_level[intra][last][run_esc]) {
146 : edgomez 766 escape = ESCAPE2;
147 :     escape_len = 7 + 2;
148 :     level_esc = level;
149 : edgomez 1382 } else {
150 :     if (!intra) {
151 : edgomez 766 coeff_VLC[intra][last][level + offset][run].code
152 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1;
153 :     coeff_VLC[intra][last][level + offset][run].len = 30;
154 :     coeff_VLC[intra][last][offset - level][run].code
155 : suxen_drol 883 = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-(int32_t)level & 0xfff) << 1) | 1;
156 : edgomez 766 coeff_VLC[intra][last][offset - level][run].len = 30;
157 : edgomez 764 }
158 : edgomez 766 continue;
159 : edgomez 764 }
160 : edgomez 766 }
161 :    
162 :     coeff_VLC[intra][last][level + offset][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;
165 :     coeff_VLC[intra][last][level + offset][run].len
166 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
167 : edgomez 1382
168 :     if (!intra) {
169 : edgomez 766 coeff_VLC[intra][last][offset - level][run].code
170 :     = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len)
171 :     | coeff_VLC[intra][last][level_esc + offset][run_esc].code | 1;
172 :     coeff_VLC[intra][last][offset - level][run].len
173 :     = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len;
174 :     }
175 : Isibaar 3 }
176 : edgomez 766
177 : edgomez 1382 if (!intra) {
178 : edgomez 764 coeff_VLC[intra][last][0][run].code
179 :     = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1;
180 :     coeff_VLC[intra][last][0][run].len = 30;
181 :     }
182 : Isibaar 3 }
183 : edgomez 1382 }
184 :     }
185 : edgomez 845
186 : edgomez 1382 /* init sprite_trajectory tables
187 :     * even if GMC is not specified (it might be used later...) */
188 :    
189 : edgomez 851 sprite_trajectory_code[0+16384].code = 0;
190 :     sprite_trajectory_code[0+16384].len = 0;
191 : edgomez 1382 for (k=0;k<14;k++) {
192 : edgomez 851 int limit = (1<<k);
193 : edgomez 845
194 : edgomez 1382 for (l=-(2*limit-1); l <= -limit; l++) {
195 : edgomez 851 sprite_trajectory_code[l+16384].code = (2*limit-1)+l;
196 :     sprite_trajectory_code[l+16384].len = k+1;
197 :     }
198 :    
199 : edgomez 1382 for (l=limit; l<= 2*limit-1; l++) {
200 :     sprite_trajectory_code[l+16384].code = l;
201 : edgomez 851 sprite_trajectory_code[l+16384].len = k+1;
202 :     }
203 :     }
204 : Isibaar 3 }
205 :    
206 : edgomez 195 static __inline void
207 :     CodeVector(Bitstream * bs,
208 :     int32_t value,
209 : syskin 1567 int32_t f_code)
210 : Isibaar 3 {
211 : edgomez 78
212 : Isibaar 3 const int scale_factor = 1 << (f_code - 1);
213 :     const int cmp = scale_factor << 5;
214 :    
215 : edgomez 195 if (value < (-1 * cmp))
216 : Isibaar 3 value += 64 * scale_factor;
217 : edgomez 195
218 :     if (value > (cmp - 1))
219 : Isibaar 3 value -= 64 * scale_factor;
220 :    
221 : edgomez 78 if (value == 0) {
222 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[32].code,
223 :     mb_motion_table[32].len);
224 : edgomez 78 } else {
225 : Isibaar 3 uint16_t length, code, mv_res, sign;
226 : edgomez 195
227 : Isibaar 3 length = 16 << f_code;
228 :     f_code--;
229 : edgomez 195
230 : Isibaar 3 sign = (value < 0);
231 :    
232 : edgomez 195 if (value >= length)
233 : Isibaar 3 value -= 2 * length;
234 : edgomez 195 else if (value < -length)
235 : Isibaar 3 value += 2 * length;
236 :    
237 : edgomez 195 if (sign)
238 : Isibaar 3 value = -value;
239 :    
240 :     value--;
241 :     mv_res = value & ((1 << f_code) - 1);
242 :     code = ((value - mv_res) >> f_code) + 1;
243 :    
244 : edgomez 195 if (sign)
245 : Isibaar 3 code = -code;
246 :    
247 :     code += 32;
248 : edgomez 195 BitstreamPutBits(bs, mb_motion_table[code].code,
249 :     mb_motion_table[code].len);
250 :    
251 :     if (f_code)
252 : Isibaar 3 BitstreamPutBits(bs, mv_res, f_code);
253 : edgomez 78 }
254 :    
255 : Isibaar 3 }
256 :    
257 : edgomez 195 static __inline void
258 : edgomez 764 CodeCoeffInter(Bitstream * bs,
259 :     const int16_t qcoeff[64],
260 :     const uint16_t * zigzag)
261 :     {
262 :     uint32_t i, run, prev_run, code, len;
263 :     int32_t level, prev_level, level_shifted;
264 :    
265 :     i = 0;
266 :     run = 0;
267 :    
268 :     while (!(level = qcoeff[zigzag[i++]]))
269 :     run++;
270 :    
271 :     prev_level = level;
272 :     prev_run = run;
273 :     run = 0;
274 :    
275 :     while (i < 64)
276 :     {
277 :     if ((level = qcoeff[zigzag[i++]]) != 0)
278 :     {
279 :     level_shifted = prev_level + 32;
280 :     if (!(level_shifted & -64))
281 :     {
282 :     code = coeff_VLC[0][0][level_shifted][prev_run].code;
283 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
284 :     }
285 :     else
286 :     {
287 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
288 :     len = 30;
289 :     }
290 :     BitstreamPutBits(bs, code, len);
291 :     prev_level = level;
292 :     prev_run = run;
293 :     run = 0;
294 :     }
295 :     else
296 :     run++;
297 :     }
298 :    
299 :     level_shifted = prev_level + 32;
300 :     if (!(level_shifted & -64))
301 :     {
302 :     code = coeff_VLC[0][1][level_shifted][prev_run].code;
303 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
304 :     }
305 :     else
306 :     {
307 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
308 :     len = 30;
309 :     }
310 :     BitstreamPutBits(bs, code, len);
311 :     }
312 :    
313 :     static __inline void
314 :     CodeCoeffIntra(Bitstream * bs,
315 :     const int16_t qcoeff[64],
316 :     const uint16_t * zigzag)
317 :     {
318 :     uint32_t i, abs_level, run, prev_run, code, len;
319 :     int32_t level, prev_level;
320 :    
321 :     i = 1;
322 :     run = 0;
323 :    
324 : edgomez 851 while (i<64 && !(level = qcoeff[zigzag[i++]]))
325 : edgomez 764 run++;
326 :    
327 :     prev_level = level;
328 :     prev_run = run;
329 :     run = 0;
330 :    
331 :     while (i < 64)
332 :     {
333 :     if ((level = qcoeff[zigzag[i++]]) != 0)
334 :     {
335 : edgomez 1382 abs_level = abs(prev_level);
336 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
337 :     code = coeff_VLC[1][0][abs_level][prev_run].code;
338 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
339 :     if (len != 128)
340 :     code |= (prev_level < 0);
341 :     else
342 :     {
343 :     code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
344 :     len = 30;
345 :     }
346 :     BitstreamPutBits(bs, code, len);
347 :     prev_level = level;
348 :     prev_run = run;
349 :     run = 0;
350 :     }
351 :     else
352 :     run++;
353 :     }
354 :    
355 : edgomez 1382 abs_level = abs(prev_level);
356 : edgomez 764 abs_level = abs_level < 64 ? abs_level : 0;
357 :     code = coeff_VLC[1][1][abs_level][prev_run].code;
358 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
359 :     if (len != 128)
360 :     code |= (prev_level < 0);
361 :     else
362 :     {
363 :     code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1;
364 :     len = 30;
365 :     }
366 :     BitstreamPutBits(bs, code, len);
367 :     }
368 :    
369 : edgomez 851
370 :    
371 :     /* returns the number of bits required to encode qcoeff */
372 :    
373 : edgomez 1382 int
374 : edgomez 851 CodeCoeffIntra_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
375 :     {
376 :     int bits = 0;
377 :     uint32_t i, abs_level, run, prev_run, len;
378 :     int32_t level, prev_level;
379 :    
380 :     i = 1;
381 :     run = 0;
382 :    
383 :     while (i<64 && !(level = qcoeff[zigzag[i++]]))
384 :     run++;
385 :    
386 :     if (i >= 64) return 0; /* empty block */
387 :    
388 :     prev_level = level;
389 :     prev_run = run;
390 :     run = 0;
391 :    
392 :     while (i < 64)
393 :     {
394 :     if ((level = qcoeff[zigzag[i++]]) != 0)
395 :     {
396 : edgomez 1382 abs_level = abs(prev_level);
397 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
398 :     len = coeff_VLC[1][0][abs_level][prev_run].len;
399 :     bits += len!=128 ? len : 30;
400 :    
401 :     prev_level = level;
402 :     prev_run = run;
403 :     run = 0;
404 :     }
405 :     else
406 :     run++;
407 :     }
408 :    
409 : edgomez 1382 abs_level = abs(prev_level);
410 : edgomez 851 abs_level = abs_level < 64 ? abs_level : 0;
411 :     len = coeff_VLC[1][1][abs_level][prev_run].len;
412 :     bits += len!=128 ? len : 30;
413 :    
414 :     return bits;
415 :     }
416 :    
417 :     int
418 :     CodeCoeffInter_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag)
419 :     {
420 :     uint32_t i, run, prev_run, len;
421 :     int32_t level, prev_level, level_shifted;
422 :     int bits = 0;
423 :    
424 :     i = 0;
425 :     run = 0;
426 :    
427 :     while (!(level = qcoeff[zigzag[i++]]))
428 :     run++;
429 :    
430 :     prev_level = level;
431 :     prev_run = run;
432 :     run = 0;
433 :    
434 :     while (i < 64) {
435 :     if ((level = qcoeff[zigzag[i++]]) != 0) {
436 :     level_shifted = prev_level + 32;
437 :     if (!(level_shifted & -64))
438 :     len = coeff_VLC[0][0][level_shifted][prev_run].len;
439 :     else
440 :     len = 30;
441 :    
442 :     bits += len;
443 :     prev_level = level;
444 :     prev_run = run;
445 :     run = 0;
446 :     }
447 :     else
448 :     run++;
449 :     }
450 :    
451 :     level_shifted = prev_level + 32;
452 :     if (!(level_shifted & -64))
453 :     len = coeff_VLC[0][1][level_shifted][prev_run].len;
454 :     else
455 :     len = 30;
456 :     bits += len;
457 :    
458 :     return bits;
459 :     }
460 :    
461 : edgomez 1537 static const int iDQtab[5] = {
462 : edgomez 1382 1, 0, -1 /* no change */, 2, 3
463 :     };
464 :     #define DQ_VALUE2INDEX(value) iDQtab[(value)+2]
465 : edgomez 851
466 : edgomez 764
467 : edgomez 851 static __inline void
468 :     CodeBlockIntra(const FRAMEINFO * const frame,
469 : edgomez 195 const MACROBLOCK * pMB,
470 :     int16_t qcoeff[6 * 64],
471 : edgomez 78 Bitstream * bs,
472 :     Statistics * pStat)
473 : Isibaar 3 {
474 : edgomez 78
475 : Isibaar 3 uint32_t i, mcbpc, cbpy, bits;
476 :    
477 :     cbpy = pMB->cbp >> 2;
478 :    
479 : edgomez 1382 /* write mcbpc */
480 : edgomez 195 if (frame->coding_type == I_VOP) {
481 : edgomez 78 mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2);
482 : edgomez 195 BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code,
483 :     mcbpc_intra_tab[mcbpc].len);
484 :     } else {
485 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
486 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
487 :     mcbpc_inter_tab[mcbpc].len);
488 : Isibaar 28 }
489 : Isibaar 3
490 : edgomez 1382 /* ac prediction flag */
491 : edgomez 195 if (pMB->acpred_directions[0])
492 : edgomez 78 BitstreamPutBits(bs, 1, 1);
493 : Isibaar 3 else
494 : edgomez 78 BitstreamPutBits(bs, 0, 1);
495 : Isibaar 3
496 : edgomez 1382 /* write cbpy */
497 : chl 897 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
498 : Isibaar 3
499 : edgomez 1382 /* write dquant */
500 : edgomez 195 if (pMB->mode == MODE_INTRA_Q)
501 : edgomez 1382 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
502 : Isibaar 3
503 : edgomez 1382 /* write interlacing */
504 :     if (frame->vol_flags & XVID_VOL_INTERLACING) {
505 : h 69 BitstreamPutBit(bs, pMB->field_dct);
506 :     }
507 : edgomez 1382 /* code block coeffs */
508 : edgomez 195 for (i = 0; i < 6; i++) {
509 :     if (i < 4)
510 :     BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code,
511 :     dcy_tab[qcoeff[i * 64 + 0] + 255].len);
512 : Isibaar 3 else
513 : edgomez 195 BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code,
514 :     dcc_tab[qcoeff[i * 64 + 0] + 255].len);
515 :    
516 :     if (pMB->cbp & (1 << (5 - i))) {
517 : edgomez 851 const uint16_t *scan_table =
518 : edgomez 1382 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
519 : edgomez 851 scan_tables[2] : scan_tables[pMB->acpred_directions[i]];
520 :    
521 : Isibaar 3 bits = BitstreamPos(bs);
522 :    
523 : edgomez 851 CodeCoeffIntra(bs, &qcoeff[i * 64], scan_table);
524 :    
525 : Isibaar 3 bits = BitstreamPos(bs) - bits;
526 :     pStat->iTextBits += bits;
527 :     }
528 :     }
529 : edgomez 78
530 : Isibaar 3 }
531 :    
532 :    
533 : edgomez 195 static void
534 : edgomez 851 CodeBlockInter(const FRAMEINFO * const frame,
535 : edgomez 195 const MACROBLOCK * pMB,
536 :     int16_t qcoeff[6 * 64],
537 : edgomez 78 Bitstream * bs,
538 :     Statistics * pStat)
539 : Isibaar 3 {
540 : edgomez 78
541 : Isibaar 3 int32_t i;
542 :     uint32_t bits, mcbpc, cbpy;
543 :    
544 : edgomez 78 mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3);
545 : Isibaar 3 cbpy = 15 - (pMB->cbp >> 2);
546 :    
547 : edgomez 1382 /* write mcbpc */
548 : edgomez 195 BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code,
549 :     mcbpc_inter_tab[mcbpc].len);
550 : Isibaar 3
551 : edgomez 851 if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) )
552 : edgomez 1382 BitstreamPutBit(bs, pMB->mcsel); /* mcsel: '0'=local motion, '1'=GMC */
553 : edgomez 851
554 : edgomez 1382 /* write cbpy */
555 : chl 897 BitstreamPutBits(bs, xvid_cbpy_tab[cbpy].code, xvid_cbpy_tab[cbpy].len);
556 : Isibaar 3
557 : edgomez 1382 /* write dquant */
558 : edgomez 195 if (pMB->mode == MODE_INTER_Q)
559 : edgomez 1382 BitstreamPutBits(bs, DQ_VALUE2INDEX(pMB->dquant), 2);
560 : edgomez 195
561 : edgomez 1382 /* interlacing */
562 :     if (frame->vol_flags & XVID_VOL_INTERLACING) {
563 : h 388 if (pMB->cbp) {
564 :     BitstreamPutBit(bs, pMB->field_dct);
565 : edgomez 1382 DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", pMB->field_dct);
566 : h 388 }
567 : h 69
568 : edgomez 1382 /* if inter block, write field ME flag */
569 :     if ((pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) && (pMB->mcsel == 0)) {
570 :     BitstreamPutBit(bs, 0 /*pMB->field_pred*/); /* not implemented yet */
571 :     DPRINTF(XVID_DEBUG_MB,"codep: field_pred: %i\n", pMB->field_pred);
572 : h 69
573 : edgomez 1382 /* write field prediction references */
574 :     #if 0 /* Remove the #if once field_pred is supported */
575 : edgomez 195 if (pMB->field_pred) {
576 : h 69 BitstreamPutBit(bs, pMB->field_for_top);
577 :     BitstreamPutBit(bs, pMB->field_for_bot);
578 :     }
579 : edgomez 1382 #endif
580 : h 69 }
581 :     }
582 : Isibaar 1677
583 :     bits = BitstreamPos(bs);
584 :    
585 : edgomez 1382 /* code motion vector(s) if motion is local */
586 : edgomez 851 if (!pMB->mcsel)
587 :     for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) {
588 : syskin 1567 CodeVector(bs, pMB->pmvs[i].x, frame->fcode);
589 :     CodeVector(bs, pMB->pmvs[i].y, frame->fcode);
590 : syskin 1773
591 : Isibaar 1879 #if 0 /* #ifdef _DEBUG */
592 : syskin 1773 if (i == 0) /* for simplicity */ {
593 :     int coded_length = BitstreamPos(bs) - bits;
594 :     int estimated_length = d_mv_bits(pMB->pmvs[i].x, pMB->pmvs[i].y, zeroMV, frame->fcode, 0);
595 :     assert(estimated_length == coded_length);
596 :     d_mv_bits(pMB->pmvs[i].x, pMB->pmvs[i].y, zeroMV, frame->fcode, 0);
597 :     }
598 :     #endif
599 : edgomez 851 }
600 : Isibaar 3
601 : Isibaar 1677 bits = BitstreamPos(bs) - bits;
602 :     pStat->iMVBits += bits;
603 :    
604 : Isibaar 3 bits = BitstreamPos(bs);
605 : edgomez 195
606 : edgomez 1382 /* code block coeffs */
607 : edgomez 195 for (i = 0; i < 6; i++)
608 : edgomez 1382 if (pMB->cbp & (1 << (5 - i))) {
609 : edgomez 851 const uint16_t *scan_table =
610 : edgomez 1382 frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
611 : edgomez 851 scan_tables[2] : scan_tables[0];
612 :    
613 :     CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
614 :     }
615 : Isibaar 3
616 :     bits = BitstreamPos(bs) - bits;
617 :     pStat->iTextBits += bits;
618 :     }
619 :    
620 :    
621 : edgomez 195 void
622 : edgomez 851 MBCoding(const FRAMEINFO * const frame,
623 : edgomez 195 MACROBLOCK * pMB,
624 :     int16_t qcoeff[6 * 64],
625 :     Bitstream * bs,
626 :     Statistics * pStat)
627 : Isibaar 3 {
628 : edgomez 1382 if (frame->coding_type != I_VOP)
629 :     BitstreamPutBit(bs, 0); /* not_coded */
630 :    
631 : syskin 1573 if (frame->vop_flags & XVID_VOP_GREYSCALE) {
632 :     pMB->cbp &= 0x3C; /* keep only bits 5-2 */
633 :     qcoeff[4*64+0]=0; /* for INTRA DC value is saved */
634 :     qcoeff[5*64+0]=0;
635 :     }
636 :    
637 : chl 335 if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
638 : suxen_drol 136 CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
639 : Isibaar 3 else
640 : suxen_drol 136 CodeBlockInter(frame, pMB, qcoeff, bs, pStat);
641 : edgomez 78
642 : Isibaar 3 }
643 :    
644 : edgomez 851 /***************************************************************
645 :     * bframe encoding start
646 :     ***************************************************************/
647 : suxen_drol 118
648 : edgomez 453 /*
649 : edgomez 851 mbtype
650 :     0 1b direct(h263) mvdb
651 :     1 01b interpolate mc+q dbquant, mvdf, mvdb
652 :     2 001b backward mc+q dbquant, mvdb
653 :     3 0001b forward mc+q dbquant, mvdf
654 :     */
655 : Isibaar 3
656 : edgomez 851 static __inline void
657 :     put_bvop_mbtype(Bitstream * bs,
658 :     int value)
659 :     {
660 :     switch (value) {
661 :     case MODE_FORWARD:
662 :     BitstreamPutBit(bs, 0);
663 :     case MODE_BACKWARD:
664 :     BitstreamPutBit(bs, 0);
665 :     case MODE_INTERPOLATE:
666 :     BitstreamPutBit(bs, 0);
667 :     case MODE_DIRECT:
668 :     BitstreamPutBit(bs, 1);
669 :     default:
670 :     break;
671 :     }
672 :     }
673 :    
674 :     /*
675 :     dbquant
676 :     -2 10b
677 :     0 0b
678 :     +2 11b
679 :     */
680 :    
681 :     static __inline void
682 :     put_bvop_dbquant(Bitstream * bs,
683 :     int value)
684 :     {
685 :     switch (value) {
686 :     case 0:
687 :     BitstreamPutBit(bs, 0);
688 :     return;
689 :    
690 :     case -2:
691 :     BitstreamPutBit(bs, 1);
692 :     BitstreamPutBit(bs, 0);
693 :     return;
694 :    
695 :     case 2:
696 :     BitstreamPutBit(bs, 1);
697 :     BitstreamPutBit(bs, 1);
698 :     return;
699 :    
700 : edgomez 1382 default:; /* invalid */
701 : edgomez 851 }
702 :     }
703 :    
704 :    
705 :    
706 :     void
707 : edgomez 1382 MBCodingBVOP(const FRAMEINFO * const frame,
708 :     const MACROBLOCK * mb,
709 : edgomez 851 const int16_t qcoeff[6 * 64],
710 :     const int32_t fcode,
711 :     const int32_t bcode,
712 :     Bitstream * bs,
713 : edgomez 1382 Statistics * pStat)
714 : edgomez 851 {
715 :     int vcode = fcode;
716 :     unsigned int i;
717 :    
718 : edgomez 1382 const uint16_t *scan_table =
719 :     frame->vop_flags & XVID_VOP_ALTERNATESCAN ?
720 :     scan_tables[2] : scan_tables[0];
721 :     int bits;
722 :    
723 : edgomez 851 /* ------------------------------------------------------------------
724 :     when a block is skipped it is decoded DIRECT(0,0)
725 :     hence is interpolated from forward & backward frames
726 :     ------------------------------------------------------------------ */
727 :    
728 :     if (mb->mode == MODE_DIRECT_NONE_MV) {
729 : edgomez 1382 BitstreamPutBit(bs, 1); /* skipped */
730 : edgomez 851 return;
731 :     }
732 :    
733 : edgomez 1382 BitstreamPutBit(bs, 0); /* not skipped */
734 : edgomez 851
735 :     if (mb->cbp == 0) {
736 : edgomez 1382 BitstreamPutBit(bs, 1); /* cbp == 0 */
737 : edgomez 851 } else {
738 : edgomez 1382 BitstreamPutBit(bs, 0); /* cbp == xxx */
739 : edgomez 851 }
740 :    
741 :     put_bvop_mbtype(bs, mb->mode);
742 :    
743 :     if (mb->cbp) {
744 :     BitstreamPutBits(bs, mb->cbp, 6);
745 :     }
746 :    
747 :     if (mb->mode != MODE_DIRECT && mb->cbp != 0) {
748 : edgomez 1382 put_bvop_dbquant(bs, 0); /* todo: mb->dquant = 0 */
749 : edgomez 851 }
750 :    
751 : edgomez 1382 if (frame->vol_flags & XVID_VOL_INTERLACING) {
752 :     if (mb->cbp) {
753 :     BitstreamPutBit(bs, mb->field_dct);
754 :     DPRINTF(XVID_DEBUG_MB,"codep: field_dct: %i\n", mb->field_dct);
755 :     }
756 :    
757 :     /* if not direct block, write field ME flag */
758 :     if (mb->mode != MODE_DIRECT) {
759 :     BitstreamPutBit(bs, 0 /*mb->field_pred*/); /* field ME not implemented */
760 :    
761 :     /* write field prediction references */
762 :     #if 0 /* Remove the #if once field_pred is supported */
763 :     if (mb->field_pred) {
764 :     BitstreamPutBit(bs, mb->field_for_top);
765 :     BitstreamPutBit(bs, mb->field_for_bot);
766 :     }
767 :     #endif
768 :     }
769 :     }
770 :    
771 : Isibaar 1677 bits = BitstreamPos(bs);
772 : edgomez 1382
773 : edgomez 851 switch (mb->mode) {
774 :     case MODE_INTERPOLATE:
775 : syskin 1567 CodeVector(bs, mb->pmvs[1].x, vcode); /* forward vector of interpolate mode */
776 :     CodeVector(bs, mb->pmvs[1].y, vcode);
777 : edgomez 851 case MODE_BACKWARD:
778 :     vcode = bcode;
779 :     case MODE_FORWARD:
780 : syskin 1567 CodeVector(bs, mb->pmvs[0].x, vcode);
781 :     CodeVector(bs, mb->pmvs[0].y, vcode);
782 : edgomez 851 break;
783 :     case MODE_DIRECT:
784 : syskin 1567 CodeVector(bs, mb->pmvs[3].x, 1); /* fcode is always 1 for delta vector */
785 :     CodeVector(bs, mb->pmvs[3].y, 1); /* prediction is always (0,0) */
786 : edgomez 851 default: break;
787 :     }
788 : Isibaar 1677 pStat->iMVBits += BitstreamPos(bs) - bits;
789 : edgomez 851
790 : edgomez 1382 bits = BitstreamPos(bs);
791 : edgomez 851 for (i = 0; i < 6; i++) {
792 :     if (mb->cbp & (1 << (5 - i))) {
793 : edgomez 1382 CodeCoeffInter(bs, &qcoeff[i * 64], scan_table);
794 : edgomez 851 }
795 :     }
796 : edgomez 1382 pStat->iTextBits += BitstreamPos(bs) - bits;
797 : edgomez 851 }
798 :    
799 :    
800 :    
801 :     /***************************************************************
802 :     * decoding stuff starts here *
803 :     ***************************************************************/
804 :    
805 :    
806 : edgomez 1382 /*
807 :     * for IVOP addbits == 0
808 :     * for PVOP addbits == fcode - 1
809 :     * for BVOP addbits == max(fcode,bcode) - 1
810 :     * returns true or false
811 :     */
812 :     int
813 : suxen_drol 248 check_resync_marker(Bitstream * bs, int addbits)
814 :     {
815 :     uint32_t nbits;
816 :     uint32_t code;
817 :     uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
818 :    
819 :     nbits = BitstreamNumBitsToByteAlign(bs);
820 :     code = BitstreamShowBits(bs, nbits);
821 :    
822 :     if (code == (((uint32_t)1 << (nbits - 1)) - 1))
823 :     {
824 :     return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER;
825 :     }
826 :    
827 :     return 0;
828 :     }
829 :    
830 :    
831 :    
832 : edgomez 195 int
833 :     get_mcbpc_intra(Bitstream * bs)
834 : Isibaar 3 {
835 : edgomez 78
836 : Isibaar 3 uint32_t index;
837 : edgomez 195
838 : suxen_drol 248 index = BitstreamShowBits(bs, 9);
839 : Isibaar 3 index >>= 3;
840 :    
841 :     BitstreamSkip(bs, mcbpc_intra_table[index].len);
842 : edgomez 78
843 : Isibaar 3 return mcbpc_intra_table[index].code;
844 : edgomez 78
845 : Isibaar 3 }
846 :    
847 : edgomez 195 int
848 :     get_mcbpc_inter(Bitstream * bs)
849 : Isibaar 3 {
850 : edgomez 78
851 : Isibaar 3 uint32_t index;
852 : edgomez 1382
853 : edgomez 851 index = MIN(BitstreamShowBits(bs, 9), 256);
854 : edgomez 195
855 :     BitstreamSkip(bs, mcbpc_inter_table[index].len);
856 : edgomez 78
857 : Isibaar 3 return mcbpc_inter_table[index].code;
858 : edgomez 78
859 : Isibaar 3 }
860 :    
861 : edgomez 195 int
862 :     get_cbpy(Bitstream * bs,
863 :     int intra)
864 : Isibaar 3 {
865 : edgomez 78
866 : Isibaar 3 int cbpy;
867 :     uint32_t index = BitstreamShowBits(bs, 6);
868 :    
869 :     BitstreamSkip(bs, cbpy_table[index].len);
870 :     cbpy = cbpy_table[index].code;
871 :    
872 : edgomez 195 if (!intra)
873 : Isibaar 3 cbpy = 15 - cbpy;
874 :    
875 :     return cbpy;
876 : edgomez 78
877 : Isibaar 3 }
878 :    
879 : edgomez 851 static __inline int
880 : edgomez 195 get_mv_data(Bitstream * bs)
881 : Isibaar 3 {
882 : edgomez 78
883 : Isibaar 3 uint32_t index;
884 :    
885 : edgomez 195 if (BitstreamGetBit(bs))
886 : Isibaar 3 return 0;
887 : edgomez 195
888 : Isibaar 3 index = BitstreamShowBits(bs, 12);
889 :    
890 : edgomez 195 if (index >= 512) {
891 : Isibaar 3 index = (index >> 8) - 2;
892 :     BitstreamSkip(bs, TMNMVtab0[index].len);
893 :     return TMNMVtab0[index].code;
894 :     }
895 : edgomez 195
896 :     if (index >= 128) {
897 : Isibaar 3 index = (index >> 2) - 32;
898 :     BitstreamSkip(bs, TMNMVtab1[index].len);
899 :     return TMNMVtab1[index].code;
900 :     }
901 :    
902 : edgomez 195 index -= 4;
903 : Isibaar 3
904 : Isibaar 2177 BitstreamSkip(bs, TMNMVtab2[index&0x7f].len);
905 :     return TMNMVtab2[index&0x7f].code;
906 : edgomez 78
907 : Isibaar 3 }
908 :    
909 : edgomez 195 int
910 :     get_mv(Bitstream * bs,
911 :     int fcode)
912 : Isibaar 3 {
913 : edgomez 78
914 : Isibaar 3 int data;
915 :     int res;
916 :     int mv;
917 :     int scale_fac = 1 << (fcode - 1);
918 :    
919 :     data = get_mv_data(bs);
920 : edgomez 195
921 :     if (scale_fac == 1 || data == 0)
922 : Isibaar 3 return data;
923 :    
924 :     res = BitstreamGetBits(bs, fcode - 1);
925 : edgomez 1382 mv = ((abs(data) - 1) * scale_fac) + res + 1;
926 : edgomez 195
927 : Isibaar 3 return data < 0 ? -mv : mv;
928 : edgomez 78
929 : Isibaar 3 }
930 :    
931 : edgomez 195 int
932 :     get_dc_dif(Bitstream * bs,
933 :     uint32_t dc_size)
934 : Isibaar 3 {
935 : edgomez 78
936 : Isibaar 3 int code = BitstreamGetBits(bs, dc_size);
937 :     int msb = code >> (dc_size - 1);
938 :    
939 : edgomez 195 if (msb == 0)
940 :     return (-1 * (code ^ ((1 << dc_size) - 1)));
941 : Isibaar 3
942 :     return code;
943 : edgomez 78
944 : Isibaar 3 }
945 :    
946 : edgomez 195 int
947 :     get_dc_size_lum(Bitstream * bs)
948 : Isibaar 3 {
949 : edgomez 78
950 : Isibaar 3 int code, i;
951 : edgomez 195
952 : Isibaar 3 code = BitstreamShowBits(bs, 11);
953 :    
954 : edgomez 195 for (i = 11; i > 3; i--) {
955 :     if (code == 1) {
956 : Isibaar 3 BitstreamSkip(bs, i);
957 :     return i + 1;
958 :     }
959 :     code >>= 1;
960 :     }
961 :    
962 :     BitstreamSkip(bs, dc_lum_tab[code].len);
963 :     return dc_lum_tab[code].code;
964 : edgomez 78
965 : Isibaar 3 }
966 :    
967 :    
968 : edgomez 195 int
969 :     get_dc_size_chrom(Bitstream * bs)
970 : Isibaar 3 {
971 : edgomez 78
972 : Isibaar 3 uint32_t code, i;
973 : edgomez 195
974 : Isibaar 3 code = BitstreamShowBits(bs, 12);
975 :    
976 : edgomez 195 for (i = 12; i > 2; i--) {
977 :     if (code == 1) {
978 : Isibaar 3 BitstreamSkip(bs, i);
979 :     return i;
980 :     }
981 :     code >>= 1;
982 :     }
983 :    
984 :     return 3 - BitstreamGetBits(bs, 2);
985 : edgomez 78
986 : Isibaar 3 }
987 :    
988 : edgomez 1486 #define GET_BITS(cache, n) ((cache)>>(32-(n)))
989 :    
990 : edgomez 453 static __inline int
991 :     get_coeff(Bitstream * bs,
992 :     int *run,
993 :     int *last,
994 :     int intra,
995 :     int short_video_header)
996 :     {
997 :    
998 :     uint32_t mode;
999 :     int32_t level;
1000 : edgomez 764 REVERSE_EVENT *reverse_event;
1001 : edgomez 453
1002 : edgomez 1486 uint32_t cache = BitstreamShowBits(bs, 32);
1003 :    
1004 : edgomez 677 if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */
1005 : edgomez 453 intra = 0;
1006 :    
1007 : edgomez 1486 if (GET_BITS(cache, 7) != ESCAPE) {
1008 :     reverse_event = &DCT3D[intra][GET_BITS(cache, 12)];
1009 : edgomez 453
1010 : edgomez 764 if ((level = reverse_event->event.level) == 0)
1011 :     goto error;
1012 : edgomez 453
1013 : edgomez 764 *last = reverse_event->event.last;
1014 :     *run = reverse_event->event.run;
1015 : edgomez 453
1016 : edgomez 1486 /* Don't forget to update the bitstream position */
1017 :     BitstreamSkip(bs, reverse_event->len+1);
1018 : edgomez 764
1019 : edgomez 1486 return (GET_BITS(cache, reverse_event->len+1)&0x01) ? -level : level;
1020 : edgomez 453 }
1021 :    
1022 : edgomez 1486 /* flush 7bits of cache */
1023 :     cache <<= 7;
1024 : edgomez 764
1025 : edgomez 453 if (short_video_header) {
1026 : edgomez 677 /* escape mode 4 - H.263 type, only used if short_video_header = 1 */
1027 : edgomez 1486 *last = GET_BITS(cache, 1);
1028 :     *run = (GET_BITS(cache, 7) &0x3f);
1029 :     level = (GET_BITS(cache, 15)&0xff);
1030 : edgomez 453
1031 :     if (level == 0 || level == 128)
1032 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d\n", level);
1033 : edgomez 453
1034 : edgomez 1486 /* We've "eaten" 22 bits */
1035 :     BitstreamSkip(bs, 22);
1036 :    
1037 : edgomez 764 return (level << 24) >> 24;
1038 : edgomez 453 }
1039 :    
1040 : edgomez 1486 if ((mode = GET_BITS(cache, 2)) < 3) {
1041 :     const int skip[3] = {1, 1, 2};
1042 :     cache <<= skip[mode];
1043 : edgomez 453
1044 : edgomez 1486 reverse_event = &DCT3D[intra][GET_BITS(cache, 12)];
1045 : edgomez 453
1046 : edgomez 764 if ((level = reverse_event->event.level) == 0)
1047 : edgomez 453 goto error;
1048 :    
1049 : edgomez 764 *last = reverse_event->event.last;
1050 :     *run = reverse_event->event.run;
1051 : edgomez 453
1052 : edgomez 1486 if (mode < 2) {
1053 :     /* first escape mode, level is offset */
1054 : edgomez 764 level += max_level[intra][*last][*run];
1055 : edgomez 1486 } else {
1056 :     /* second escape mode, run is offset */
1057 : edgomez 764 *run += max_run[intra][*last][level] + 1;
1058 : edgomez 1486 }
1059 :    
1060 :     /* Update bitstream position */
1061 :     BitstreamSkip(bs, 7 + skip[mode] + reverse_event->len + 1);
1062 : edgomez 453
1063 : edgomez 1486 return (GET_BITS(cache, reverse_event->len+1)&0x01) ? -level : level;
1064 : edgomez 453 }
1065 : edgomez 764
1066 : edgomez 677 /* third escape mode - fixed length codes */
1067 : edgomez 1486 cache <<= 2;
1068 :     *last = GET_BITS(cache, 1);
1069 :     *run = (GET_BITS(cache, 7)&0x3f);
1070 :     level = (GET_BITS(cache, 20)&0xfff);
1071 :    
1072 :     /* Update bitstream position */
1073 :     BitstreamSkip(bs, 30);
1074 : edgomez 453
1075 : edgomez 764 return (level << 20) >> 20;
1076 : edgomez 453
1077 :     error:
1078 : Skal 1777 *run = 64;
1079 : edgomez 453 return 0;
1080 :     }
1081 :    
1082 : edgomez 195 void
1083 :     get_intra_block(Bitstream * bs,
1084 :     int16_t * block,
1085 :     int direction,
1086 :     int coeff)
1087 : Isibaar 3 {
1088 : edgomez 78
1089 : edgomez 195 const uint16_t *scan = scan_tables[direction];
1090 : Isibaar 1795 int level, run, last = 0;
1091 : Isibaar 3
1092 : edgomez 195 do {
1093 : Isibaar 3 level = get_coeff(bs, &run, &last, 1, 0);
1094 : Isibaar 1775 coeff += run;
1095 : Skal 1777 if (coeff & ~63) {
1096 : Isibaar 1775 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
1097 : Isibaar 3 break;
1098 :     }
1099 : suxen_drol 1632
1100 : edgomez 195 block[scan[coeff]] = level;
1101 : suxen_drol 252
1102 : edgomez 1382 DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[coeff], level);
1103 :     #if 0
1104 :     DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i %08x\n", scan[coeff], level, BitstreamShowBits(bs, 32));
1105 :     #endif
1106 : suxen_drol 252
1107 : suxen_drol 759 if (level < -2047 || level > 2047) {
1108 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR,"warning: intra_overflow %i\n", level);
1109 : Isibaar 3 }
1110 :     coeff++;
1111 :     } while (!last);
1112 : edgomez 78
1113 : Isibaar 3 }
1114 :    
1115 : edgomez 195 void
1116 : edgomez 1486 get_inter_block_h263(
1117 :     Bitstream * bs,
1118 :     int16_t * block,
1119 :     int direction,
1120 :     const int quant,
1121 :     const uint16_t *matrix)
1122 : Isibaar 3 {
1123 : edgomez 78
1124 : edgomez 851 const uint16_t *scan = scan_tables[direction];
1125 : edgomez 1486 const uint16_t quant_m_2 = quant << 1;
1126 :     const uint16_t quant_add = (quant & 1 ? quant : quant - 1);
1127 : Isibaar 3 int p;
1128 :     int level;
1129 :     int run;
1130 : Isibaar 1795 int last = 0;
1131 : Isibaar 3
1132 :     p = 0;
1133 : edgomez 195 do {
1134 : Isibaar 3 level = get_coeff(bs, &run, &last, 0, 0);
1135 : Isibaar 1775 p += run;
1136 : Skal 1777 if (p & ~63) {
1137 : Isibaar 1775 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
1138 : Isibaar 3 break;
1139 :     }
1140 : chenm001 161
1141 : edgomez 1486 if (level < 0) {
1142 :     level = level*quant_m_2 - quant_add;
1143 :     block[scan[p]] = (level >= -2048 ? level : -2048);
1144 :     } else {
1145 :     level = level * quant_m_2 + quant_add;
1146 :     block[scan[p]] = (level <= 2047 ? level : 2047);
1147 :     }
1148 :     p++;
1149 :     } while (!last);
1150 :     }
1151 : suxen_drol 252
1152 : edgomez 1486 void
1153 :     get_inter_block_mpeg(
1154 :     Bitstream * bs,
1155 :     int16_t * block,
1156 :     int direction,
1157 :     const int quant,
1158 :     const uint16_t *matrix)
1159 :     {
1160 :     const uint16_t *scan = scan_tables[direction];
1161 :     uint32_t sum = 0;
1162 :     int p;
1163 :     int level;
1164 :     int run;
1165 : Isibaar 1795 int last = 0;
1166 : suxen_drol 252
1167 : edgomez 1486 p = 0;
1168 :     do {
1169 :     level = get_coeff(bs, &run, &last, 0, 0);
1170 : Isibaar 1775 p += run;
1171 : Skal 1777 if (p & ~63) {
1172 : Isibaar 1775 DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
1173 : edgomez 1486 break;
1174 : Isibaar 3 }
1175 : edgomez 1486
1176 :     if (level < 0) {
1177 :     level = ((2 * -level + 1) * matrix[scan[p]] * quant) >> 4;
1178 :     block[scan[p]] = (level <= 2048 ? -level : -2048);
1179 :     } else {
1180 :     level = ((2 * level + 1) * matrix[scan[p]] * quant) >> 4;
1181 :     block[scan[p]] = (level <= 2047 ? level : 2047);
1182 :     }
1183 :    
1184 :     sum ^= block[scan[p]];
1185 :    
1186 : Isibaar 3 p++;
1187 :     } while (!last);
1188 : edgomez 78
1189 : edgomez 1486 /* mismatch control */
1190 :     if ((sum & 1) == 0) {
1191 :     block[63] ^= 1;
1192 :     }
1193 : Isibaar 3 }
1194 : edgomez 861
1195 : edgomez 1382
1196 : edgomez 861 /*****************************************************************************
1197 :     * VLC tables and other constant arrays
1198 :     ****************************************************************************/
1199 :    
1200 :     VLC_TABLE const coeff_tab[2][102] =
1201 :     {
1202 :     /* intra = 0 */
1203 :     {
1204 :     {{ 2, 2}, {0, 0, 1}},
1205 :     {{15, 4}, {0, 0, 2}},
1206 :     {{21, 6}, {0, 0, 3}},
1207 :     {{23, 7}, {0, 0, 4}},
1208 :     {{31, 8}, {0, 0, 5}},
1209 :     {{37, 9}, {0, 0, 6}},
1210 :     {{36, 9}, {0, 0, 7}},
1211 :     {{33, 10}, {0, 0, 8}},
1212 :     {{32, 10}, {0, 0, 9}},
1213 :     {{ 7, 11}, {0, 0, 10}},
1214 :     {{ 6, 11}, {0, 0, 11}},
1215 :     {{32, 11}, {0, 0, 12}},
1216 :     {{ 6, 3}, {0, 1, 1}},
1217 :     {{20, 6}, {0, 1, 2}},
1218 :     {{30, 8}, {0, 1, 3}},
1219 :     {{15, 10}, {0, 1, 4}},
1220 :     {{33, 11}, {0, 1, 5}},
1221 :     {{80, 12}, {0, 1, 6}},
1222 :     {{14, 4}, {0, 2, 1}},
1223 :     {{29, 8}, {0, 2, 2}},
1224 :     {{14, 10}, {0, 2, 3}},
1225 :     {{81, 12}, {0, 2, 4}},
1226 :     {{13, 5}, {0, 3, 1}},
1227 :     {{35, 9}, {0, 3, 2}},
1228 :     {{13, 10}, {0, 3, 3}},
1229 :     {{12, 5}, {0, 4, 1}},
1230 :     {{34, 9}, {0, 4, 2}},
1231 :     {{82, 12}, {0, 4, 3}},
1232 :     {{11, 5}, {0, 5, 1}},
1233 :     {{12, 10}, {0, 5, 2}},
1234 :     {{83, 12}, {0, 5, 3}},
1235 :     {{19, 6}, {0, 6, 1}},
1236 :     {{11, 10}, {0, 6, 2}},
1237 :     {{84, 12}, {0, 6, 3}},
1238 :     {{18, 6}, {0, 7, 1}},
1239 :     {{10, 10}, {0, 7, 2}},
1240 :     {{17, 6}, {0, 8, 1}},
1241 :     {{ 9, 10}, {0, 8, 2}},
1242 :     {{16, 6}, {0, 9, 1}},
1243 :     {{ 8, 10}, {0, 9, 2}},
1244 :     {{22, 7}, {0, 10, 1}},
1245 :     {{85, 12}, {0, 10, 2}},
1246 :     {{21, 7}, {0, 11, 1}},
1247 :     {{20, 7}, {0, 12, 1}},
1248 :     {{28, 8}, {0, 13, 1}},
1249 :     {{27, 8}, {0, 14, 1}},
1250 :     {{33, 9}, {0, 15, 1}},
1251 :     {{32, 9}, {0, 16, 1}},
1252 :     {{31, 9}, {0, 17, 1}},
1253 :     {{30, 9}, {0, 18, 1}},
1254 :     {{29, 9}, {0, 19, 1}},
1255 :     {{28, 9}, {0, 20, 1}},
1256 :     {{27, 9}, {0, 21, 1}},
1257 :     {{26, 9}, {0, 22, 1}},
1258 :     {{34, 11}, {0, 23, 1}},
1259 :     {{35, 11}, {0, 24, 1}},
1260 :     {{86, 12}, {0, 25, 1}},
1261 :     {{87, 12}, {0, 26, 1}},
1262 :     {{ 7, 4}, {1, 0, 1}},
1263 :     {{25, 9}, {1, 0, 2}},
1264 :     {{ 5, 11}, {1, 0, 3}},
1265 :     {{15, 6}, {1, 1, 1}},
1266 :     {{ 4, 11}, {1, 1, 2}},
1267 :     {{14, 6}, {1, 2, 1}},
1268 :     {{13, 6}, {1, 3, 1}},
1269 :     {{12, 6}, {1, 4, 1}},
1270 :     {{19, 7}, {1, 5, 1}},
1271 :     {{18, 7}, {1, 6, 1}},
1272 :     {{17, 7}, {1, 7, 1}},
1273 :     {{16, 7}, {1, 8, 1}},
1274 :     {{26, 8}, {1, 9, 1}},
1275 :     {{25, 8}, {1, 10, 1}},
1276 :     {{24, 8}, {1, 11, 1}},
1277 :     {{23, 8}, {1, 12, 1}},
1278 :     {{22, 8}, {1, 13, 1}},
1279 :     {{21, 8}, {1, 14, 1}},
1280 :     {{20, 8}, {1, 15, 1}},
1281 :     {{19, 8}, {1, 16, 1}},
1282 :     {{24, 9}, {1, 17, 1}},
1283 :     {{23, 9}, {1, 18, 1}},
1284 :     {{22, 9}, {1, 19, 1}},
1285 :     {{21, 9}, {1, 20, 1}},
1286 :     {{20, 9}, {1, 21, 1}},
1287 :     {{19, 9}, {1, 22, 1}},
1288 :     {{18, 9}, {1, 23, 1}},
1289 :     {{17, 9}, {1, 24, 1}},
1290 :     {{ 7, 10}, {1, 25, 1}},
1291 :     {{ 6, 10}, {1, 26, 1}},
1292 :     {{ 5, 10}, {1, 27, 1}},
1293 :     {{ 4, 10}, {1, 28, 1}},
1294 :     {{36, 11}, {1, 29, 1}},
1295 :     {{37, 11}, {1, 30, 1}},
1296 :     {{38, 11}, {1, 31, 1}},
1297 :     {{39, 11}, {1, 32, 1}},
1298 :     {{88, 12}, {1, 33, 1}},
1299 :     {{89, 12}, {1, 34, 1}},
1300 :     {{90, 12}, {1, 35, 1}},
1301 :     {{91, 12}, {1, 36, 1}},
1302 :     {{92, 12}, {1, 37, 1}},
1303 :     {{93, 12}, {1, 38, 1}},
1304 :     {{94, 12}, {1, 39, 1}},
1305 :     {{95, 12}, {1, 40, 1}}
1306 :     },
1307 :     /* intra = 1 */
1308 :     {
1309 :     {{ 2, 2}, {0, 0, 1}},
1310 :     {{15, 4}, {0, 0, 3}},
1311 :     {{21, 6}, {0, 0, 6}},
1312 :     {{23, 7}, {0, 0, 9}},
1313 :     {{31, 8}, {0, 0, 10}},
1314 :     {{37, 9}, {0, 0, 13}},
1315 :     {{36, 9}, {0, 0, 14}},
1316 :     {{33, 10}, {0, 0, 17}},
1317 :     {{32, 10}, {0, 0, 18}},
1318 :     {{ 7, 11}, {0, 0, 21}},
1319 :     {{ 6, 11}, {0, 0, 22}},
1320 :     {{32, 11}, {0, 0, 23}},
1321 :     {{ 6, 3}, {0, 0, 2}},
1322 :     {{20, 6}, {0, 1, 2}},
1323 :     {{30, 8}, {0, 0, 11}},
1324 :     {{15, 10}, {0, 0, 19}},
1325 :     {{33, 11}, {0, 0, 24}},
1326 :     {{80, 12}, {0, 0, 25}},
1327 :     {{14, 4}, {0, 1, 1}},
1328 :     {{29, 8}, {0, 0, 12}},
1329 :     {{14, 10}, {0, 0, 20}},
1330 :     {{81, 12}, {0, 0, 26}},
1331 :     {{13, 5}, {0, 0, 4}},
1332 :     {{35, 9}, {0, 0, 15}},
1333 :     {{13, 10}, {0, 1, 7}},
1334 :     {{12, 5}, {0, 0, 5}},
1335 :     {{34, 9}, {0, 4, 2}},
1336 :     {{82, 12}, {0, 0, 27}},
1337 :     {{11, 5}, {0, 2, 1}},
1338 :     {{12, 10}, {0, 2, 4}},
1339 :     {{83, 12}, {0, 1, 9}},
1340 :     {{19, 6}, {0, 0, 7}},
1341 :     {{11, 10}, {0, 3, 4}},
1342 :     {{84, 12}, {0, 6, 3}},
1343 :     {{18, 6}, {0, 0, 8}},
1344 :     {{10, 10}, {0, 4, 3}},
1345 :     {{17, 6}, {0, 3, 1}},
1346 :     {{ 9, 10}, {0, 8, 2}},
1347 :     {{16, 6}, {0, 4, 1}},
1348 :     {{ 8, 10}, {0, 5, 3}},
1349 :     {{22, 7}, {0, 1, 3}},
1350 :     {{85, 12}, {0, 1, 10}},
1351 :     {{21, 7}, {0, 2, 2}},
1352 :     {{20, 7}, {0, 7, 1}},
1353 :     {{28, 8}, {0, 1, 4}},
1354 :     {{27, 8}, {0, 3, 2}},
1355 :     {{33, 9}, {0, 0, 16}},
1356 :     {{32, 9}, {0, 1, 5}},
1357 :     {{31, 9}, {0, 1, 6}},
1358 :     {{30, 9}, {0, 2, 3}},
1359 :     {{29, 9}, {0, 3, 3}},
1360 :     {{28, 9}, {0, 5, 2}},
1361 :     {{27, 9}, {0, 6, 2}},
1362 :     {{26, 9}, {0, 7, 2}},
1363 :     {{34, 11}, {0, 1, 8}},
1364 :     {{35, 11}, {0, 9, 2}},
1365 :     {{86, 12}, {0, 2, 5}},
1366 :     {{87, 12}, {0, 7, 3}},
1367 :     {{ 7, 4}, {1, 0, 1}},
1368 :     {{25, 9}, {0, 11, 1}},
1369 :     {{ 5, 11}, {1, 0, 6}},
1370 :     {{15, 6}, {1, 1, 1}},
1371 :     {{ 4, 11}, {1, 0, 7}},
1372 :     {{14, 6}, {1, 2, 1}},
1373 :     {{13, 6}, {0, 5, 1}},
1374 :     {{12, 6}, {1, 0, 2}},
1375 :     {{19, 7}, {1, 5, 1}},
1376 :     {{18, 7}, {0, 6, 1}},
1377 :     {{17, 7}, {1, 3, 1}},
1378 :     {{16, 7}, {1, 4, 1}},
1379 :     {{26, 8}, {1, 9, 1}},
1380 :     {{25, 8}, {0, 8, 1}},
1381 :     {{24, 8}, {0, 9, 1}},
1382 :     {{23, 8}, {0, 10, 1}},
1383 :     {{22, 8}, {1, 0, 3}},
1384 :     {{21, 8}, {1, 6, 1}},
1385 :     {{20, 8}, {1, 7, 1}},
1386 :     {{19, 8}, {1, 8, 1}},
1387 :     {{24, 9}, {0, 12, 1}},
1388 :     {{23, 9}, {1, 0, 4}},
1389 :     {{22, 9}, {1, 1, 2}},
1390 :     {{21, 9}, {1, 10, 1}},
1391 :     {{20, 9}, {1, 11, 1}},
1392 :     {{19, 9}, {1, 12, 1}},
1393 :     {{18, 9}, {1, 13, 1}},
1394 :     {{17, 9}, {1, 14, 1}},
1395 :     {{ 7, 10}, {0, 13, 1}},
1396 :     {{ 6, 10}, {1, 0, 5}},
1397 :     {{ 5, 10}, {1, 1, 3}},
1398 :     {{ 4, 10}, {1, 2, 2}},
1399 :     {{36, 11}, {1, 3, 2}},
1400 :     {{37, 11}, {1, 4, 2}},
1401 :     {{38, 11}, {1, 15, 1}},
1402 :     {{39, 11}, {1, 16, 1}},
1403 :     {{88, 12}, {0, 14, 1}},
1404 :     {{89, 12}, {1, 0, 8}},
1405 :     {{90, 12}, {1, 5, 2}},
1406 :     {{91, 12}, {1, 6, 2}},
1407 :     {{92, 12}, {1, 17, 1}},
1408 :     {{93, 12}, {1, 18, 1}},
1409 :     {{94, 12}, {1, 19, 1}},
1410 :     {{95, 12}, {1, 20, 1}}
1411 :     }
1412 :     };
1413 :    
1414 :     /* constants taken from momusys/vm_common/inlcude/max_level.h */
1415 :     uint8_t const max_level[2][2][64] = {
1416 :     {
1417 :     /* intra = 0, last = 0 */
1418 :     {
1419 :     12, 6, 4, 3, 3, 3, 3, 2,
1420 :     2, 2, 2, 1, 1, 1, 1, 1,
1421 :     1, 1, 1, 1, 1, 1, 1, 1,
1422 :     1, 1, 1, 0, 0, 0, 0, 0,
1423 :     0, 0, 0, 0, 0, 0, 0, 0,
1424 :     0, 0, 0, 0, 0, 0, 0, 0,
1425 :     0, 0, 0, 0, 0, 0, 0, 0,
1426 :     0, 0, 0, 0, 0, 0, 0, 0
1427 :     },
1428 :     /* intra = 0, last = 1 */
1429 :     {
1430 :     3, 2, 1, 1, 1, 1, 1, 1,
1431 :     1, 1, 1, 1, 1, 1, 1, 1,
1432 :     1, 1, 1, 1, 1, 1, 1, 1,
1433 :     1, 1, 1, 1, 1, 1, 1, 1,
1434 :     1, 1, 1, 1, 1, 1, 1, 1,
1435 :     1, 0, 0, 0, 0, 0, 0, 0,
1436 :     0, 0, 0, 0, 0, 0, 0, 0,
1437 :     0, 0, 0, 0, 0, 0, 0, 0
1438 :     }
1439 :     },
1440 :     {
1441 :     /* intra = 1, last = 0 */
1442 :     {
1443 :     27, 10, 5, 4, 3, 3, 3, 3,
1444 :     2, 2, 1, 1, 1, 1, 1, 0,
1445 :     0, 0, 0, 0, 0, 0, 0, 0,
1446 :     0, 0, 0, 0, 0, 0, 0, 0,
1447 :     0, 0, 0, 0, 0, 0, 0, 0,
1448 :     0, 0, 0, 0, 0, 0, 0, 0,
1449 :     0, 0, 0, 0, 0, 0, 0, 0,
1450 :     0, 0, 0, 0, 0, 0, 0, 0
1451 :     },
1452 :     /* intra = 1, last = 1 */
1453 :     {
1454 :     8, 3, 2, 2, 2, 2, 2, 1,
1455 :     1, 1, 1, 1, 1, 1, 1, 1,
1456 :     1, 1, 1, 1, 1, 0, 0, 0,
1457 :     0, 0, 0, 0, 0, 0, 0, 0,
1458 :     0, 0, 0, 0, 0, 0, 0, 0,
1459 :     0, 0, 0, 0, 0, 0, 0, 0,
1460 :     0, 0, 0, 0, 0, 0, 0, 0,
1461 :     0, 0, 0, 0, 0, 0, 0, 0
1462 :     }
1463 :     }
1464 :     };
1465 :    
1466 :     uint8_t const max_run[2][2][64] = {
1467 :     {
1468 :     /* intra = 0, last = 0 */
1469 :     {
1470 :     0, 26, 10, 6, 2, 1, 1, 0,
1471 :     0, 0, 0, 0, 0, 0, 0, 0,
1472 :     0, 0, 0, 0, 0, 0, 0, 0,
1473 :     0, 0, 0, 0, 0, 0, 0, 0,
1474 :     0, 0, 0, 0, 0, 0, 0, 0,
1475 :     0, 0, 0, 0, 0, 0, 0, 0,
1476 :     0, 0, 0, 0, 0, 0, 0, 0,
1477 :     0, 0, 0, 0, 0, 0, 0, 0,
1478 :     },
1479 :     /* intra = 0, last = 1 */
1480 : edgomez 1382 {
1481 : edgomez 861 0, 40, 1, 0, 0, 0, 0, 0,
1482 :     0, 0, 0, 0, 0, 0, 0, 0,
1483 :     0, 0, 0, 0, 0, 0, 0, 0,
1484 :     0, 0, 0, 0, 0, 0, 0, 0,
1485 :     0, 0, 0, 0, 0, 0, 0, 0,
1486 :     0, 0, 0, 0, 0, 0, 0, 0,
1487 :     0, 0, 0, 0, 0, 0, 0, 0,
1488 :     0, 0, 0, 0, 0, 0, 0, 0,
1489 :     }
1490 :     },
1491 :     {
1492 :     /* intra = 1, last = 0 */
1493 :     {
1494 :     0, 14, 9, 7, 3, 2, 1, 1,
1495 :     1, 1, 1, 0, 0, 0, 0, 0,
1496 :     0, 0, 0, 0, 0, 0, 0, 0,
1497 :     0, 0, 0, 0, 0, 0, 0, 0,
1498 :     0, 0, 0, 0, 0, 0, 0, 0,
1499 :     0, 0, 0, 0, 0, 0, 0, 0,
1500 :     0, 0, 0, 0, 0, 0, 0, 0,
1501 :     0, 0, 0, 0, 0, 0, 0, 0,
1502 :     },
1503 :     /* intra = 1, last = 1 */
1504 :     {
1505 :     0, 20, 6, 1, 0, 0, 0, 0,
1506 :     0, 0, 0, 0, 0, 0, 0, 0,
1507 :     0, 0, 0, 0, 0, 0, 0, 0,
1508 :     0, 0, 0, 0, 0, 0, 0, 0,
1509 :     0, 0, 0, 0, 0, 0, 0, 0,
1510 :     0, 0, 0, 0, 0, 0, 0, 0,
1511 :     0, 0, 0, 0, 0, 0, 0, 0,
1512 :     0, 0, 0, 0, 0, 0, 0, 0,
1513 :     }
1514 :     }
1515 :     };
1516 :    
1517 :     /******************************************************************
1518 :     * encoder tables *
1519 :     ******************************************************************/
1520 :    
1521 :     VLC sprite_trajectory_code[32768];
1522 :    
1523 :     VLC sprite_trajectory_len[15] = {
1524 : edgomez 1382 { 0x00 , 2},
1525 :     { 0x02 , 3}, { 0x03, 3}, { 0x04, 3}, { 0x05, 3}, { 0x06, 3},
1526 :     { 0x0E , 4}, { 0x1E, 5}, { 0x3E, 6}, { 0x7E, 7}, { 0xFE, 8},
1527 : edgomez 861 { 0x1FE, 9}, {0x3FE,10}, {0x7FE,11}, {0xFFE,12} };
1528 :    
1529 :    
1530 :     /* DCT coefficients. Four tables, two for last = 0, two for last = 1.
1531 :     the sign bit must be added afterwards. */
1532 :    
1533 :     /* MCBPC Indexing by cbpc in first two bits, mode in last two.
1534 :     CBPC as in table 4/H.263, MB type (mode): 3 = 01, 4 = 10.
1535 :     Example: cbpc = 01 and mode = 4 gives index = 0110 = 6. */
1536 :    
1537 :     VLC mcbpc_intra_tab[15] = {
1538 :     {0x01, 9}, {0x01, 1}, {0x01, 4}, {0x00, 0},
1539 :     {0x00, 0}, {0x01, 3}, {0x01, 6}, {0x00, 0},
1540 :     {0x00, 0}, {0x02, 3}, {0x02, 6}, {0x00, 0},
1541 :     {0x00, 0}, {0x03, 3}, {0x03, 6}
1542 :     };
1543 :    
1544 :     /* MCBPC inter.
1545 :     Addressing: 5 bit ccmmm (cc = CBPC, mmm = mode (1-4 binary)) */
1546 :    
1547 :     VLC mcbpc_inter_tab[29] = {
1548 :     {1, 1}, {3, 3}, {2, 3}, {3, 5}, {4, 6}, {1, 9}, {0, 0}, {0, 0},
1549 :     {3, 4}, {7, 7}, {5, 7}, {4, 8}, {4, 9}, {0, 0}, {0, 0}, {0, 0},
1550 :     {2, 4}, {6, 7}, {4, 7}, {3, 8}, {3, 9}, {0, 0}, {0, 0}, {0, 0},
1551 :     {5, 6}, {5, 9}, {5, 8}, {3, 7}, {2, 9}
1552 :     };
1553 :    
1554 : chl 897 const VLC xvid_cbpy_tab[16] = {
1555 : edgomez 861 {3, 4}, {5, 5}, {4, 5}, {9, 4}, {3, 5}, {7, 4}, {2, 6}, {11, 4},
1556 :     {2, 5}, {3, 6}, {5, 4}, {10, 4}, {4, 4}, {8, 4}, {6, 4}, {3, 2}
1557 :     };
1558 :    
1559 :     const VLC dcy_tab[511] = {
1560 :     {0x100, 15}, {0x101, 15}, {0x102, 15}, {0x103, 15},
1561 :     {0x104, 15}, {0x105, 15}, {0x106, 15}, {0x107, 15},
1562 :     {0x108, 15}, {0x109, 15}, {0x10a, 15}, {0x10b, 15},
1563 :     {0x10c, 15}, {0x10d, 15}, {0x10e, 15}, {0x10f, 15},
1564 :     {0x110, 15}, {0x111, 15}, {0x112, 15}, {0x113, 15},
1565 :     {0x114, 15}, {0x115, 15}, {0x116, 15}, {0x117, 15},
1566 :     {0x118, 15}, {0x119, 15}, {0x11a, 15}, {0x11b, 15},
1567 :     {0x11c, 15}, {0x11d, 15}, {0x11e, 15}, {0x11f, 15},
1568 :     {0x120, 15}, {0x121, 15}, {0x122, 15}, {0x123, 15},
1569 :     {0x124, 15}, {0x125, 15}, {0x126, 15}, {0x127, 15},
1570 :     {0x128, 15}, {0x129, 15}, {0x12a, 15}, {0x12b, 15},
1571 :     {0x12c, 15}, {0x12d, 15}, {0x12e, 15}, {0x12f, 15},
1572 :     {0x130, 15}, {0x131, 15}, {0x132, 15}, {0x133, 15},
1573 :     {0x134, 15}, {0x135, 15}, {0x136, 15}, {0x137, 15},
1574 :     {0x138, 15}, {0x139, 15}, {0x13a, 15}, {0x13b, 15},
1575 :     {0x13c, 15}, {0x13d, 15}, {0x13e, 15}, {0x13f, 15},
1576 :     {0x140, 15}, {0x141, 15}, {0x142, 15}, {0x143, 15},
1577 :     {0x144, 15}, {0x145, 15}, {0x146, 15}, {0x147, 15},
1578 :     {0x148, 15}, {0x149, 15}, {0x14a, 15}, {0x14b, 15},
1579 :     {0x14c, 15}, {0x14d, 15}, {0x14e, 15}, {0x14f, 15},
1580 :     {0x150, 15}, {0x151, 15}, {0x152, 15}, {0x153, 15},
1581 :     {0x154, 15}, {0x155, 15}, {0x156, 15}, {0x157, 15},
1582 :     {0x158, 15}, {0x159, 15}, {0x15a, 15}, {0x15b, 15},
1583 :     {0x15c, 15}, {0x15d, 15}, {0x15e, 15}, {0x15f, 15},
1584 :     {0x160, 15}, {0x161, 15}, {0x162, 15}, {0x163, 15},
1585 :     {0x164, 15}, {0x165, 15}, {0x166, 15}, {0x167, 15},
1586 :     {0x168, 15}, {0x169, 15}, {0x16a, 15}, {0x16b, 15},
1587 :     {0x16c, 15}, {0x16d, 15}, {0x16e, 15}, {0x16f, 15},
1588 :     {0x170, 15}, {0x171, 15}, {0x172, 15}, {0x173, 15},
1589 :     {0x174, 15}, {0x175, 15}, {0x176, 15}, {0x177, 15},
1590 :     {0x178, 15}, {0x179, 15}, {0x17a, 15}, {0x17b, 15},
1591 :     {0x17c, 15}, {0x17d, 15}, {0x17e, 15}, {0x17f, 15},
1592 :     {0x80, 13}, {0x81, 13}, {0x82, 13}, {0x83, 13},
1593 :     {0x84, 13}, {0x85, 13}, {0x86, 13}, {0x87, 13},
1594 :     {0x88, 13}, {0x89, 13}, {0x8a, 13}, {0x8b, 13},
1595 :     {0x8c, 13}, {0x8d, 13}, {0x8e, 13}, {0x8f, 13},
1596 :     {0x90, 13}, {0x91, 13}, {0x92, 13}, {0x93, 13},
1597 :     {0x94, 13}, {0x95, 13}, {0x96, 13}, {0x97, 13},
1598 :     {0x98, 13}, {0x99, 13}, {0x9a, 13}, {0x9b, 13},
1599 :     {0x9c, 13}, {0x9d, 13}, {0x9e, 13}, {0x9f, 13},
1600 :     {0xa0, 13}, {0xa1, 13}, {0xa2, 13}, {0xa3, 13},
1601 :     {0xa4, 13}, {0xa5, 13}, {0xa6, 13}, {0xa7, 13},
1602 :     {0xa8, 13}, {0xa9, 13}, {0xaa, 13}, {0xab, 13},
1603 :     {0xac, 13}, {0xad, 13}, {0xae, 13}, {0xaf, 13},
1604 :     {0xb0, 13}, {0xb1, 13}, {0xb2, 13}, {0xb3, 13},
1605 :     {0xb4, 13}, {0xb5, 13}, {0xb6, 13}, {0xb7, 13},
1606 :     {0xb8, 13}, {0xb9, 13}, {0xba, 13}, {0xbb, 13},
1607 :     {0xbc, 13}, {0xbd, 13}, {0xbe, 13}, {0xbf, 13},
1608 :     {0x40, 11}, {0x41, 11}, {0x42, 11}, {0x43, 11},
1609 :     {0x44, 11}, {0x45, 11}, {0x46, 11}, {0x47, 11},
1610 :     {0x48, 11}, {0x49, 11}, {0x4a, 11}, {0x4b, 11},
1611 :     {0x4c, 11}, {0x4d, 11}, {0x4e, 11}, {0x4f, 11},
1612 :     {0x50, 11}, {0x51, 11}, {0x52, 11}, {0x53, 11},
1613 :     {0x54, 11}, {0x55, 11}, {0x56, 11}, {0x57, 11},
1614 :     {0x58, 11}, {0x59, 11}, {0x5a, 11}, {0x5b, 11},
1615 :     {0x5c, 11}, {0x5d, 11}, {0x5e, 11}, {0x5f, 11},
1616 :     {0x20, 9}, {0x21, 9}, {0x22, 9}, {0x23, 9},
1617 :     {0x24, 9}, {0x25, 9}, {0x26, 9}, {0x27, 9},
1618 :     {0x28, 9}, {0x29, 9}, {0x2a, 9}, {0x2b, 9},
1619 :     {0x2c, 9}, {0x2d, 9}, {0x2e, 9}, {0x2f, 9},
1620 :     {0x10, 7}, {0x11, 7}, {0x12, 7}, {0x13, 7},
1621 :     {0x14, 7}, {0x15, 7}, {0x16, 7}, {0x17, 7},
1622 :     {0x10, 6}, {0x11, 6}, {0x12, 6}, {0x13, 6},
1623 :     {0x08, 4}, {0x09, 4}, {0x06, 3}, {0x03, 3},
1624 :     {0x07, 3}, {0x0a, 4}, {0x0b, 4}, {0x14, 6},
1625 :     {0x15, 6}, {0x16, 6}, {0x17, 6}, {0x18, 7},
1626 :     {0x19, 7}, {0x1a, 7}, {0x1b, 7}, {0x1c, 7},
1627 :     {0x1d, 7}, {0x1e, 7}, {0x1f, 7}, {0x30, 9},
1628 :     {0x31, 9}, {0x32, 9}, {0x33, 9}, {0x34, 9},
1629 :     {0x35, 9}, {0x36, 9}, {0x37, 9}, {0x38, 9},
1630 :     {0x39, 9}, {0x3a, 9}, {0x3b, 9}, {0x3c, 9},
1631 :     {0x3d, 9}, {0x3e, 9}, {0x3f, 9}, {0x60, 11},
1632 :     {0x61, 11}, {0x62, 11}, {0x63, 11}, {0x64, 11},
1633 :     {0x65, 11}, {0x66, 11}, {0x67, 11}, {0x68, 11},
1634 :     {0x69, 11}, {0x6a, 11}, {0x6b, 11}, {0x6c, 11},
1635 :     {0x6d, 11}, {0x6e, 11}, {0x6f, 11}, {0x70, 11},
1636 :     {0x71, 11}, {0x72, 11}, {0x73, 11}, {0x74, 11},
1637 :     {0x75, 11}, {0x76, 11}, {0x77, 11}, {0x78, 11},
1638 :     {0x79, 11}, {0x7a, 11}, {0x7b, 11}, {0x7c, 11},
1639 :     {0x7d, 11}, {0x7e, 11}, {0x7f, 11}, {0xc0, 13},
1640 :     {0xc1, 13}, {0xc2, 13}, {0xc3, 13}, {0xc4, 13},
1641 :     {0xc5, 13}, {0xc6, 13}, {0xc7, 13}, {0xc8, 13},
1642 :     {0xc9, 13}, {0xca, 13}, {0xcb, 13}, {0xcc, 13},
1643 :     {0xcd, 13}, {0xce, 13}, {0xcf, 13}, {0xd0, 13},
1644 :     {0xd1, 13}, {0xd2, 13}, {0xd3, 13}, {0xd4, 13},
1645 :     {0xd5, 13}, {0xd6, 13}, {0xd7, 13}, {0xd8, 13},
1646 :     {0xd9, 13}, {0xda, 13}, {0xdb, 13}, {0xdc, 13},
1647 :     {0xdd, 13}, {0xde, 13}, {0xdf, 13}, {0xe0, 13},
1648 :     {0xe1, 13}, {0xe2, 13}, {0xe3, 13}, {0xe4, 13},
1649 :     {0xe5, 13}, {0xe6, 13}, {0xe7, 13}, {0xe8, 13},
1650 :     {0xe9, 13}, {0xea, 13}, {0xeb, 13}, {0xec, 13},
1651 :     {0xed, 13}, {0xee, 13}, {0xef, 13}, {0xf0, 13},
1652 :     {0xf1, 13}, {0xf2, 13}, {0xf3, 13}, {0xf4, 13},
1653 :     {0xf5, 13}, {0xf6, 13}, {0xf7, 13}, {0xf8, 13},
1654 :     {0xf9, 13}, {0xfa, 13}, {0xfb, 13}, {0xfc, 13},
1655 :     {0xfd, 13}, {0xfe, 13}, {0xff, 13}, {0x180, 15},
1656 :     {0x181, 15}, {0x182, 15}, {0x183, 15}, {0x184, 15},
1657 :     {0x185, 15}, {0x186, 15}, {0x187, 15}, {0x188, 15},
1658 :     {0x189, 15}, {0x18a, 15}, {0x18b, 15}, {0x18c, 15},
1659 :     {0x18d, 15}, {0x18e, 15}, {0x18f, 15}, {0x190, 15},
1660 :     {0x191, 15}, {0x192, 15}, {0x193, 15}, {0x194, 15},
1661 :     {0x195, 15}, {0x196, 15}, {0x197, 15}, {0x198, 15},
1662 :     {0x199, 15}, {0x19a, 15}, {0x19b, 15}, {0x19c, 15},
1663 :     {0x19d, 15}, {0x19e, 15}, {0x19f, 15}, {0x1a0, 15},
1664 :     {0x1a1, 15}, {0x1a2, 15}, {0x1a3, 15}, {0x1a4, 15},
1665 :     {0x1a5, 15}, {0x1a6, 15}, {0x1a7, 15}, {0x1a8, 15},
1666 :     {0x1a9, 15}, {0x1aa, 15}, {0x1ab, 15}, {0x1ac, 15},
1667 :     {0x1ad, 15}, {0x1ae, 15}, {0x1af, 15}, {0x1b0, 15},
1668 :     {0x1b1, 15}, {0x1b2, 15}, {0x1b3, 15}, {0x1b4, 15},
1669 :     {0x1b5, 15}, {0x1b6, 15}, {0x1b7, 15}, {0x1b8, 15},
1670 :     {0x1b9, 15}, {0x1ba, 15}, {0x1bb, 15}, {0x1bc, 15},
1671 :     {0x1bd, 15}, {0x1be, 15}, {0x1bf, 15}, {0x1c0, 15},
1672 :     {0x1c1, 15}, {0x1c2, 15}, {0x1c3, 15}, {0x1c4, 15},
1673 :     {0x1c5, 15}, {0x1c6, 15}, {0x1c7, 15}, {0x1c8, 15},
1674 :     {0x1c9, 15}, {0x1ca, 15}, {0x1cb, 15}, {0x1cc, 15},
1675 :     {0x1cd, 15}, {0x1ce, 15}, {0x1cf, 15}, {0x1d0, 15},
1676 :     {0x1d1, 15}, {0x1d2, 15}, {0x1d3, 15}, {0x1d4, 15},
1677 :     {0x1d5, 15}, {0x1d6, 15}, {0x1d7, 15}, {0x1d8, 15},
1678 :     {0x1d9, 15}, {0x1da, 15}, {0x1db, 15}, {0x1dc, 15},
1679 :     {0x1dd, 15}, {0x1de, 15}, {0x1df, 15}, {0x1e0, 15},
1680 :     {0x1e1, 15}, {0x1e2, 15}, {0x1e3, 15}, {0x1e4, 15},
1681 :     {0x1e5, 15}, {0x1e6, 15}, {0x1e7, 15}, {0x1e8, 15},
1682 :     {0x1e9, 15}, {0x1ea, 15}, {0x1eb, 15}, {0x1ec, 15},
1683 :     {0x1ed, 15}, {0x1ee, 15}, {0x1ef, 15}, {0x1f0, 15},
1684 :     {0x1f1, 15}, {0x1f2, 15}, {0x1f3, 15}, {0x1f4, 15},
1685 :     {0x1f5, 15}, {0x1f6, 15}, {0x1f7, 15}, {0x1f8, 15},
1686 :     {0x1f9, 15}, {0x1fa, 15}, {0x1fb, 15}, {0x1fc, 15},
1687 :     {0x1fd, 15}, {0x1fe, 15}, {0x1ff, 15},
1688 :     };
1689 :    
1690 :     const VLC dcc_tab[511] = {
1691 :     {0x100, 16}, {0x101, 16}, {0x102, 16}, {0x103, 16},
1692 :     {0x104, 16}, {0x105, 16}, {0x106, 16}, {0x107, 16},
1693 :     {0x108, 16}, {0x109, 16}, {0x10a, 16}, {0x10b, 16},
1694 :     {0x10c, 16}, {0x10d, 16}, {0x10e, 16}, {0x10f, 16},
1695 :     {0x110, 16}, {0x111, 16}, {0x112, 16}, {0x113, 16},
1696 :     {0x114, 16}, {0x115, 16}, {0x116, 16}, {0x117, 16},
1697 :     {0x118, 16}, {0x119, 16}, {0x11a, 16}, {0x11b, 16},
1698 :     {0x11c, 16}, {0x11d, 16}, {0x11e, 16}, {0x11f, 16},
1699 :     {0x120, 16}, {0x121, 16}, {0x122, 16}, {0x123, 16},
1700 :     {0x124, 16}, {0x125, 16}, {0x126, 16}, {0x127, 16},
1701 :     {0x128, 16}, {0x129, 16}, {0x12a, 16}, {0x12b, 16},
1702 :     {0x12c, 16}, {0x12d, 16}, {0x12e, 16}, {0x12f, 16},
1703 :     {0x130, 16}, {0x131, 16}, {0x132, 16}, {0x133, 16},
1704 :     {0x134, 16}, {0x135, 16}, {0x136, 16}, {0x137, 16},
1705 :     {0x138, 16}, {0x139, 16}, {0x13a, 16}, {0x13b, 16},
1706 :     {0x13c, 16}, {0x13d, 16}, {0x13e, 16}, {0x13f, 16},
1707 :     {0x140, 16}, {0x141, 16}, {0x142, 16}, {0x143, 16},
1708 :     {0x144, 16}, {0x145, 16}, {0x146, 16}, {0x147, 16},
1709 :     {0x148, 16}, {0x149, 16}, {0x14a, 16}, {0x14b, 16},
1710 :     {0x14c, 16}, {0x14d, 16}, {0x14e, 16}, {0x14f, 16},
1711 :     {0x150, 16}, {0x151, 16}, {0x152, 16}, {0x153, 16},
1712 :     {0x154, 16}, {0x155, 16}, {0x156, 16}, {0x157, 16},
1713 :     {0x158, 16}, {0x159, 16}, {0x15a, 16}, {0x15b, 16},
1714 :     {0x15c, 16}, {0x15d, 16}, {0x15e, 16}, {0x15f, 16},
1715 :     {0x160, 16}, {0x161, 16}, {0x162, 16}, {0x163, 16},
1716 :     {0x164, 16}, {0x165, 16}, {0x166, 16}, {0x167, 16},
1717 :     {0x168, 16}, {0x169, 16}, {0x16a, 16}, {0x16b, 16},
1718 :     {0x16c, 16}, {0x16d, 16}, {0x16e, 16}, {0x16f, 16},
1719 :     {0x170, 16}, {0x171, 16}, {0x172, 16}, {0x173, 16},
1720 :     {0x174, 16}, {0x175, 16}, {0x176, 16}, {0x177, 16},
1721 :     {0x178, 16}, {0x179, 16}, {0x17a, 16}, {0x17b, 16},
1722 :     {0x17c, 16}, {0x17d, 16}, {0x17e, 16}, {0x17f, 16},
1723 :     {0x80, 14}, {0x81, 14}, {0x82, 14}, {0x83, 14},
1724 :     {0x84, 14}, {0x85, 14}, {0x86, 14}, {0x87, 14},
1725 :     {0x88, 14}, {0x89, 14}, {0x8a, 14}, {0x8b, 14},
1726 :     {0x8c, 14}, {0x8d, 14}, {0x8e, 14}, {0x8f, 14},
1727 :     {0x90, 14}, {0x91, 14}, {0x92, 14}, {0x93, 14},
1728 :     {0x94, 14}, {0x95, 14}, {0x96, 14}, {0x97, 14},
1729 :     {0x98, 14}, {0x99, 14}, {0x9a, 14}, {0x9b, 14},
1730 :     {0x9c, 14}, {0x9d, 14}, {0x9e, 14}, {0x9f, 14},
1731 :     {0xa0, 14}, {0xa1, 14}, {0xa2, 14}, {0xa3, 14},
1732 :     {0xa4, 14}, {0xa5, 14}, {0xa6, 14}, {0xa7, 14},
1733 :     {0xa8, 14}, {0xa9, 14}, {0xaa, 14}, {0xab, 14},
1734 :     {0xac, 14}, {0xad, 14}, {0xae, 14}, {0xaf, 14},
1735 :     {0xb0, 14}, {0xb1, 14}, {0xb2, 14}, {0xb3, 14},
1736 :     {0xb4, 14}, {0xb5, 14}, {0xb6, 14}, {0xb7, 14},
1737 :     {0xb8, 14}, {0xb9, 14}, {0xba, 14}, {0xbb, 14},
1738 :     {0xbc, 14}, {0xbd, 14}, {0xbe, 14}, {0xbf, 14},
1739 :     {0x40, 12}, {0x41, 12}, {0x42, 12}, {0x43, 12},
1740 :     {0x44, 12}, {0x45, 12}, {0x46, 12}, {0x47, 12},
1741 :     {0x48, 12}, {0x49, 12}, {0x4a, 12}, {0x4b, 12},
1742 :     {0x4c, 12}, {0x4d, 12}, {0x4e, 12}, {0x4f, 12},
1743 :     {0x50, 12}, {0x51, 12}, {0x52, 12}, {0x53, 12},
1744 :     {0x54, 12}, {0x55, 12}, {0x56, 12}, {0x57, 12},
1745 :     {0x58, 12}, {0x59, 12}, {0x5a, 12}, {0x5b, 12},
1746 :     {0x5c, 12}, {0x5d, 12}, {0x5e, 12}, {0x5f, 12},
1747 :     {0x20, 10}, {0x21, 10}, {0x22, 10}, {0x23, 10},
1748 :     {0x24, 10}, {0x25, 10}, {0x26, 10}, {0x27, 10},
1749 :     {0x28, 10}, {0x29, 10}, {0x2a, 10}, {0x2b, 10},
1750 :     {0x2c, 10}, {0x2d, 10}, {0x2e, 10}, {0x2f, 10},
1751 :     {0x10, 8}, {0x11, 8}, {0x12, 8}, {0x13, 8},
1752 :     {0x14, 8}, {0x15, 8}, {0x16, 8}, {0x17, 8},
1753 :     {0x08, 6}, {0x09, 6}, {0x0a, 6}, {0x0b, 6},
1754 :     {0x04, 4}, {0x05, 4}, {0x04, 3}, {0x03, 2},
1755 :     {0x05, 3}, {0x06, 4}, {0x07, 4}, {0x0c, 6},
1756 :     {0x0d, 6}, {0x0e, 6}, {0x0f, 6}, {0x18, 8},
1757 :     {0x19, 8}, {0x1a, 8}, {0x1b, 8}, {0x1c, 8},
1758 :     {0x1d, 8}, {0x1e, 8}, {0x1f, 8}, {0x30, 10},
1759 :     {0x31, 10}, {0x32, 10}, {0x33, 10}, {0x34, 10},
1760 :     {0x35, 10}, {0x36, 10}, {0x37, 10}, {0x38, 10},
1761 :     {0x39, 10}, {0x3a, 10}, {0x3b, 10}, {0x3c, 10},
1762 :     {0x3d, 10}, {0x3e, 10}, {0x3f, 10}, {0x60, 12},
1763 :     {0x61, 12}, {0x62, 12}, {0x63, 12}, {0x64, 12},
1764 :     {0x65, 12}, {0x66, 12}, {0x67, 12}, {0x68, 12},
1765 :     {0x69, 12}, {0x6a, 12}, {0x6b, 12}, {0x6c, 12},
1766 :     {0x6d, 12}, {0x6e, 12}, {0x6f, 12}, {0x70, 12},
1767 :     {0x71, 12}, {0x72, 12}, {0x73, 12}, {0x74, 12},
1768 :     {0x75, 12}, {0x76, 12}, {0x77, 12}, {0x78, 12},
1769 :     {0x79, 12}, {0x7a, 12}, {0x7b, 12}, {0x7c, 12},
1770 :     {0x7d, 12}, {0x7e, 12}, {0x7f, 12}, {0xc0, 14},
1771 :     {0xc1, 14}, {0xc2, 14}, {0xc3, 14}, {0xc4, 14},
1772 :     {0xc5, 14}, {0xc6, 14}, {0xc7, 14}, {0xc8, 14},
1773 :     {0xc9, 14}, {0xca, 14}, {0xcb, 14}, {0xcc, 14},
1774 :     {0xcd, 14}, {0xce, 14}, {0xcf, 14}, {0xd0, 14},
1775 :     {0xd1, 14}, {0xd2, 14}, {0xd3, 14}, {0xd4, 14},
1776 :     {0xd5, 14}, {0xd6, 14}, {0xd7, 14}, {0xd8, 14},
1777 :     {0xd9, 14}, {0xda, 14}, {0xdb, 14}, {0xdc, 14},
1778 :     {0xdd, 14}, {0xde, 14}, {0xdf, 14}, {0xe0, 14},
1779 :     {0xe1, 14}, {0xe2, 14}, {0xe3, 14}, {0xe4, 14},
1780 :     {0xe5, 14}, {0xe6, 14}, {0xe7, 14}, {0xe8, 14},
1781 :     {0xe9, 14}, {0xea, 14}, {0xeb, 14}, {0xec, 14},
1782 :     {0xed, 14}, {0xee, 14}, {0xef, 14}, {0xf0, 14},
1783 :     {0xf1, 14}, {0xf2, 14}, {0xf3, 14}, {0xf4, 14},
1784 :     {0xf5, 14}, {0xf6, 14}, {0xf7, 14}, {0xf8, 14},
1785 :     {0xf9, 14}, {0xfa, 14}, {0xfb, 14}, {0xfc, 14},
1786 :     {0xfd, 14}, {0xfe, 14}, {0xff, 14}, {0x180, 16},
1787 :     {0x181, 16}, {0x182, 16}, {0x183, 16}, {0x184, 16},
1788 :     {0x185, 16}, {0x186, 16}, {0x187, 16}, {0x188, 16},
1789 :     {0x189, 16}, {0x18a, 16}, {0x18b, 16}, {0x18c, 16},
1790 :     {0x18d, 16}, {0x18e, 16}, {0x18f, 16}, {0x190, 16},
1791 :     {0x191, 16}, {0x192, 16}, {0x193, 16}, {0x194, 16},
1792 :     {0x195, 16}, {0x196, 16}, {0x197, 16}, {0x198, 16},
1793 :     {0x199, 16}, {0x19a, 16}, {0x19b, 16}, {0x19c, 16},
1794 :     {0x19d, 16}, {0x19e, 16}, {0x19f, 16}, {0x1a0, 16},
1795 :     {0x1a1, 16}, {0x1a2, 16}, {0x1a3, 16}, {0x1a4, 16},
1796 :     {0x1a5, 16}, {0x1a6, 16}, {0x1a7, 16}, {0x1a8, 16},
1797 :     {0x1a9, 16}, {0x1aa, 16}, {0x1ab, 16}, {0x1ac, 16},
1798 :     {0x1ad, 16}, {0x1ae, 16}, {0x1af, 16}, {0x1b0, 16},
1799 :     {0x1b1, 16}, {0x1b2, 16}, {0x1b3, 16}, {0x1b4, 16},
1800 :     {0x1b5, 16}, {0x1b6, 16}, {0x1b7, 16}, {0x1b8, 16},
1801 :     {0x1b9, 16}, {0x1ba, 16}, {0x1bb, 16}, {0x1bc, 16},
1802 :     {0x1bd, 16}, {0x1be, 16}, {0x1bf, 16}, {0x1c0, 16},
1803 :     {0x1c1, 16}, {0x1c2, 16}, {0x1c3, 16}, {0x1c4, 16},
1804 :     {0x1c5, 16}, {0x1c6, 16}, {0x1c7, 16}, {0x1c8, 16},
1805 :     {0x1c9, 16}, {0x1ca, 16}, {0x1cb, 16}, {0x1cc, 16},
1806 :     {0x1cd, 16}, {0x1ce, 16}, {0x1cf, 16}, {0x1d0, 16},
1807 :     {0x1d1, 16}, {0x1d2, 16}, {0x1d3, 16}, {0x1d4, 16},
1808 :     {0x1d5, 16}, {0x1d6, 16}, {0x1d7, 16}, {0x1d8, 16},
1809 :     {0x1d9, 16}, {0x1da, 16}, {0x1db, 16}, {0x1dc, 16},
1810 :     {0x1dd, 16}, {0x1de, 16}, {0x1df, 16}, {0x1e0, 16},
1811 :     {0x1e1, 16}, {0x1e2, 16}, {0x1e3, 16}, {0x1e4, 16},
1812 :     {0x1e5, 16}, {0x1e6, 16}, {0x1e7, 16}, {0x1e8, 16},
1813 :     {0x1e9, 16}, {0x1ea, 16}, {0x1eb, 16}, {0x1ec, 16},
1814 :     {0x1ed, 16}, {0x1ee, 16}, {0x1ef, 16}, {0x1f0, 16},
1815 :     {0x1f1, 16}, {0x1f2, 16}, {0x1f3, 16}, {0x1f4, 16},
1816 :     {0x1f5, 16}, {0x1f6, 16}, {0x1f7, 16}, {0x1f8, 16},
1817 :     {0x1f9, 16}, {0x1fa, 16}, {0x1fb, 16}, {0x1fc, 16},
1818 :     {0x1fd, 16}, {0x1fe, 16}, {0x1ff, 16},
1819 :     };
1820 :    
1821 :    
1822 :     const VLC mb_motion_table[65] = {
1823 :     {0x05, 13}, {0x07, 13}, {0x05, 12}, {0x07, 12},
1824 :     {0x09, 12}, {0x0b, 12}, {0x0d, 12}, {0x0f, 12},
1825 :     {0x09, 11}, {0x0b, 11}, {0x0d, 11}, {0x0f, 11},
1826 :     {0x11, 11}, {0x13, 11}, {0x15, 11}, {0x17, 11},
1827 :     {0x19, 11}, {0x1b, 11}, {0x1d, 11}, {0x1f, 11},
1828 :     {0x21, 11}, {0x23, 11}, {0x13, 10}, {0x15, 10},
1829 :     {0x17, 10}, {0x07, 8}, {0x09, 8}, {0x0b, 8},
1830 :     {0x07, 7}, {0x03, 5}, {0x03, 4}, {0x03, 3},
1831 :     {0x01, 1}, {0x02, 3}, {0x02, 4}, {0x02, 5},
1832 :     {0x06, 7}, {0x0a, 8}, {0x08, 8}, {0x06, 8},
1833 :     {0x16, 10}, {0x14, 10}, {0x12, 10}, {0x22, 11},
1834 :     {0x20, 11}, {0x1e, 11}, {0x1c, 11}, {0x1a, 11},
1835 :     {0x18, 11}, {0x16, 11}, {0x14, 11}, {0x12, 11},
1836 :     {0x10, 11}, {0x0e, 11}, {0x0c, 11}, {0x0a, 11},
1837 :     {0x08, 11}, {0x0e, 12}, {0x0c, 12}, {0x0a, 12},
1838 :     {0x08, 12}, {0x06, 12}, {0x04, 12}, {0x06, 13},
1839 :     {0x04, 13}
1840 :     };
1841 :    
1842 :    
1843 :     /******************************************************************
1844 :     * decoder tables *
1845 :     ******************************************************************/
1846 :    
1847 :     VLC const mcbpc_intra_table[64] = {
1848 :     {-1, 0}, {20, 6}, {36, 6}, {52, 6}, {4, 4}, {4, 4}, {4, 4}, {4, 4},
1849 :     {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3}, {19, 3},
1850 :     {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3}, {35, 3},
1851 :     {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3}, {51, 3},
1852 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1853 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1854 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1},
1855 :     {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}, {3, 1}
1856 :     };
1857 :    
1858 :     VLC const mcbpc_inter_table[257] = {
1859 :     {VLC_ERROR, 0}, {255, 9}, {52, 9}, {36, 9}, {20, 9}, {49, 9}, {35, 8}, {35, 8},
1860 :     {19, 8}, {19, 8}, {50, 8}, {50, 8}, {51, 7}, {51, 7}, {51, 7}, {51, 7},
1861 :     {34, 7}, {34, 7}, {34, 7}, {34, 7}, {18, 7}, {18, 7}, {18, 7}, {18, 7},
1862 :     {33, 7}, {33, 7}, {33, 7}, {33, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7},
1863 :     {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6}, {4, 6},
1864 :     {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6}, {48, 6},
1865 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1866 :     {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5}, {3, 5},
1867 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1868 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1869 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1870 :     {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4}, {32, 4},
1871 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1872 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1873 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1874 :     {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4}, {16, 4},
1875 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1876 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1877 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1878 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
1879 :     {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3}, {2, 3},
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 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1884 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1885 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1886 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
1887 :     {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 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 :     {0, 1}
1892 :     };
1893 :    
1894 :     VLC const cbpy_table[64] = {
1895 :     {-1, 0}, {-1, 0}, {6, 6}, {9, 6}, {8, 5}, {8, 5}, {4, 5}, {4, 5},
1896 :     {2, 5}, {2, 5}, {1, 5}, {1, 5}, {0, 4}, {0, 4}, {0, 4}, {0, 4},
1897 :     {12, 4}, {12, 4}, {12, 4}, {12, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4},
1898 :     {14, 4}, {14, 4}, {14, 4}, {14, 4}, {5, 4}, {5, 4}, {5, 4}, {5, 4},
1899 :     {13, 4}, {13, 4}, {13, 4}, {13, 4}, {3, 4}, {3, 4}, {3, 4}, {3, 4},
1900 :     {11, 4}, {11, 4}, {11, 4}, {11, 4}, {7, 4}, {7, 4}, {7, 4}, {7, 4},
1901 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2},
1902 :     {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}, {15, 2}
1903 :     };
1904 :    
1905 :     VLC const TMNMVtab0[] = {
1906 :     {3, 4}, {-3, 4}, {2, 3}, {2, 3}, {-2, 3}, {-2, 3}, {1, 2},
1907 :     {1, 2}, {1, 2}, {1, 2}, {-1, 2}, {-1, 2}, {-1, 2}, {-1, 2}
1908 :     };
1909 :    
1910 :     VLC const TMNMVtab1[] = {
1911 :     {12, 10}, {-12, 10}, {11, 10}, {-11, 10},
1912 :     {10, 9}, {10, 9}, {-10, 9}, {-10, 9},
1913 :     {9, 9}, {9, 9}, {-9, 9}, {-9, 9},
1914 :     {8, 9}, {8, 9}, {-8, 9}, {-8, 9},
1915 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1916 :     {7, 7}, {7, 7}, {7, 7}, {7, 7},
1917 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1918 :     {-7, 7}, {-7, 7}, {-7, 7}, {-7, 7},
1919 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1920 :     {6, 7}, {6, 7}, {6, 7}, {6, 7},
1921 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1922 :     {-6, 7}, {-6, 7}, {-6, 7}, {-6, 7},
1923 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1924 :     {5, 7}, {5, 7}, {5, 7}, {5, 7},
1925 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1926 :     {-5, 7}, {-5, 7}, {-5, 7}, {-5, 7},
1927 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1928 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1929 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1930 :     {4, 6}, {4, 6}, {4, 6}, {4, 6},
1931 :     {-4, 6}, {-4, 6}, {-4, 6}, {-4, 6},
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 :     };
1936 :    
1937 :     VLC const TMNMVtab2[] = {
1938 :     {32, 12}, {-32, 12}, {31, 12}, {-31, 12},
1939 :     {30, 11}, {30, 11}, {-30, 11}, {-30, 11},
1940 :     {29, 11}, {29, 11}, {-29, 11}, {-29, 11},
1941 :     {28, 11}, {28, 11}, {-28, 11}, {-28, 11},
1942 :     {27, 11}, {27, 11}, {-27, 11}, {-27, 11},
1943 :     {26, 11}, {26, 11}, {-26, 11}, {-26, 11},
1944 :     {25, 11}, {25, 11}, {-25, 11}, {-25, 11},
1945 :     {24, 10}, {24, 10}, {24, 10}, {24, 10},
1946 :     {-24, 10}, {-24, 10}, {-24, 10}, {-24, 10},
1947 :     {23, 10}, {23, 10}, {23, 10}, {23, 10},
1948 :     {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10},
1949 :     {22, 10}, {22, 10}, {22, 10}, {22, 10},
1950 :     {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},
1951 :     {21, 10}, {21, 10}, {21, 10}, {21, 10},
1952 :     {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},
1953 :     {20, 10}, {20, 10}, {20, 10}, {20, 10},
1954 :     {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10},
1955 :     {19, 10}, {19, 10}, {19, 10}, {19, 10},
1956 :     {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},
1957 :     {18, 10}, {18, 10}, {18, 10}, {18, 10},
1958 :     {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10},
1959 :     {17, 10}, {17, 10}, {17, 10}, {17, 10},
1960 :     {-17, 10}, {-17, 10}, {-17, 10}, {-17, 10},
1961 :     {16, 10}, {16, 10}, {16, 10}, {16, 10},
1962 :     {-16, 10}, {-16, 10}, {-16, 10}, {-16, 10},
1963 :     {15, 10}, {15, 10}, {15, 10}, {15, 10},
1964 :     {-15, 10}, {-15, 10}, {-15, 10}, {-15, 10},
1965 :     {14, 10}, {14, 10}, {14, 10}, {14, 10},
1966 :     {-14, 10}, {-14, 10}, {-14, 10}, {-14, 10},
1967 :     {13, 10}, {13, 10}, {13, 10}, {13, 10},
1968 : Isibaar 2177 {-13, 10}, {-13, 10}, {-13, 10}, {-13, 10},
1969 :     {0, 0}, {0, 0}, {0, 0}, {0, 0}
1970 : edgomez 861 };
1971 :    
1972 :     short const dc_threshold[] = {
1973 : edgomez 1609 26708, 29545, 29472, 26223, 30580, 29281, 8293, 29545,
1974 :     25632, 29285, 30313, 25701, 26144, 28530, 8301, 26740,
1975 :     8293, 20039, 8277, 20551, 8268, 30296, 17513, 25376,
1976 : Isibaar 1939 25711, 25445, 10272, 11825, 11828, 10544, 2606, 28505,
1977 : edgomez 1609 29301, 29472, 26223, 30580, 29281, 8293, 26980, 29811,
1978 :     26994, 30050, 28532, 8306, 24936, 8307, 28532, 26400,
1979 :     30313, 8293, 25441, 25955, 29555, 29728, 8303, 29801,
1980 :     8307, 28531, 29301, 25955, 25376, 25711, 11877, 10
1981 : edgomez 861 };
1982 :    
1983 :     VLC const dc_lum_tab[] = {
1984 :     {0, 0}, {4, 3}, {3, 3}, {0, 3},
1985 :     {2, 2}, {2, 2}, {1, 2}, {1, 2},
1986 :     };

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