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aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavcodec / vc1_block.c
blobd8f45f91dca88941248795f71fc5f1195c320e73
1 /*
2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2011 Mashiat Sarker Shakkhar
4 * Copyright (c) 2006-2007 Konstantin Shishkov
5 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6 *
7 * This file is part of Libav.
8 *
9 * Libav is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * Libav is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with Libav; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * VC-1 and WMV3 block decoding routines
27 */
28
29 #include "avcodec.h"
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "msmpeg4data.h"
33 #include "unary_legacy.h"
34 #include "vc1.h"
35 #include "vc1_pred.h"
36 #include "vc1acdata.h"
37 #include "vc1data.h"
38
39 #define MB_INTRA_VLC_BITS 9
40 #define DC_VLC_BITS 9
41
42 // offset tables for interlaced picture MVDATA decoding
43 static const int offset_table1[9] = { 0, 1, 2, 4, 8, 16, 32, 64, 128 };
44 static const int offset_table2[9] = { 0, 1, 3, 7, 15, 31, 63, 127, 255 };
45
46 /***********************************************************************/
47 /**
48 * @name VC-1 Bitplane decoding
49 * @see 8.7, p56
50 * @{
51 */
52
53 /**
54 * Imode types
55 * @{
56 */
57 enum Imode {
58 IMODE_RAW,
59 IMODE_NORM2,
60 IMODE_DIFF2,
61 IMODE_NORM6,
62 IMODE_DIFF6,
63 IMODE_ROWSKIP,
64 IMODE_COLSKIP
65 };
66 /** @} */ //imode defines
67
68 static void init_block_index(VC1Context *v)
69 {
70 MpegEncContext *s = &v->s;
71 ff_init_block_index(s);
72 if (v->field_mode && !(v->second_field ^ v->tff)) {
73 s->dest[0] += s->current_picture_ptr->f->linesize[0];
74 s->dest[1] += s->current_picture_ptr->f->linesize[1];
75 s->dest[2] += s->current_picture_ptr->f->linesize[2];
76 }
77 }
78
79 /** @} */ //Bitplane group
80
81 static void vc1_put_signed_blocks_clamped(VC1Context *v)
82 {
83 MpegEncContext *s = &v->s;
84 int topleft_mb_pos, top_mb_pos;
85 int stride_y, fieldtx = 0;
86 int v_dist;
87
88 /* The put pixels loop is always one MB row behind the decoding loop,
89 * because we can only put pixels when overlap filtering is done, and
90 * for filtering of the bottom edge of a MB, we need the next MB row
91 * present as well.
92 * Within the row, the put pixels loop is also one MB col behind the
93 * decoding loop. The reason for this is again, because for filtering
94 * of the right MB edge, we need the next MB present. */
95 if (!s->first_slice_line) {
96 if (s->mb_x) {
97 topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1;
98 if (v->fcm == ILACE_FRAME)
99 fieldtx = v->fieldtx_plane[topleft_mb_pos];
100 stride_y = s->linesize << fieldtx;
101 v_dist = (16 - fieldtx) >> (fieldtx == 0);
102 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],
103 s->dest[0] - 16 * s->linesize - 16,
104 stride_y);
105 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],
106 s->dest[0] - 16 * s->linesize - 8,
107 stride_y);
108 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],
109 s->dest[0] - v_dist * s->linesize - 16,
110 stride_y);
111 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],
112 s->dest[0] - v_dist * s->linesize - 8,
113 stride_y);
114 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],
115 s->dest[1] - 8 * s->uvlinesize - 8,
116 s->uvlinesize);
117 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],
118 s->dest[2] - 8 * s->uvlinesize - 8,
119 s->uvlinesize);
120 }
121 if (s->mb_x == s->mb_width - 1) {
122 top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x;
123 if (v->fcm == ILACE_FRAME)
124 fieldtx = v->fieldtx_plane[top_mb_pos];
125 stride_y = s->linesize << fieldtx;
126 v_dist = fieldtx ? 15 : 8;
127 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],
128 s->dest[0] - 16 * s->linesize,
129 stride_y);
130 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],
131 s->dest[0] - 16 * s->linesize + 8,
132 stride_y);
133 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],
134 s->dest[0] - v_dist * s->linesize,
135 stride_y);
136 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],
137 s->dest[0] - v_dist * s->linesize + 8,
138 stride_y);
139 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],
140 s->dest[1] - 8 * s->uvlinesize,
141 s->uvlinesize);
142 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],
143 s->dest[2] - 8 * s->uvlinesize,
144 s->uvlinesize);
145 }
146 }
147
148 #define inc_blk_idx(idx) do { \
149 idx++; \
150 if (idx >= v->n_allocated_blks) \
151 idx = 0; \
152 } while (0)
153
154 inc_blk_idx(v->topleft_blk_idx);
155 inc_blk_idx(v->top_blk_idx);
156 inc_blk_idx(v->left_blk_idx);
157 inc_blk_idx(v->cur_blk_idx);
158 }
159
160 /***********************************************************************/
161 /**
162 * @name VC-1 Block-level functions
163 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
164 * @{
165 */
166
167 /**
168 * @def GET_MQUANT
169 * @brief Get macroblock-level quantizer scale
170 */
171 #define GET_MQUANT() \
172 if (v->dquantfrm) { \
173 int edges = 0; \
174 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
175 if (v->dqbilevel) { \
176 mquant = (get_bits1(gb)) ? v->altpq : v->pq; \
177 } else { \
178 mqdiff = get_bits(gb, 3); \
179 if (mqdiff != 7) \
180 mquant = v->pq + mqdiff; \
181 else \
182 mquant = get_bits(gb, 5); \
183 } \
184 } \
185 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
186 edges = 1 << v->dqsbedge; \
187 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
188 edges = (3 << v->dqsbedge) % 15; \
189 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
190 edges = 15; \
191 if ((edges&1) && !s->mb_x) \
192 mquant = v->altpq; \
193 if ((edges&2) && s->first_slice_line) \
194 mquant = v->altpq; \
195 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
196 mquant = v->altpq; \
197 if ((edges&8) && s->mb_y == (s->mb_height - 1)) \
198 mquant = v->altpq; \
199 if (!mquant || mquant > 31) { \
200 av_log(v->s.avctx, AV_LOG_ERROR, \
201 "Overriding invalid mquant %d\n", mquant); \
202 mquant = 1; \
203 } \
204 }
205
206 /**
207 * @def GET_MVDATA(_dmv_x, _dmv_y)
208 * @brief Get MV differentials
209 * @see MVDATA decoding from 8.3.5.2, p(1)20
210 * @param _dmv_x Horizontal differential for decoded MV
211 * @param _dmv_y Vertical differential for decoded MV
212 */
213 #define GET_MVDATA(_dmv_x, _dmv_y) \
214 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
215 VC1_MV_DIFF_VLC_BITS, 2); \
216 if (index > 36) { \
217 mb_has_coeffs = 1; \
218 index -= 37; \
219 } else \
220 mb_has_coeffs = 0; \
221 s->mb_intra = 0; \
222 if (!index) { \
223 _dmv_x = _dmv_y = 0; \
224 } else if (index == 35) { \
225 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
226 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
227 } else if (index == 36) { \
228 _dmv_x = 0; \
229 _dmv_y = 0; \
230 s->mb_intra = 1; \
231 } else { \
232 index1 = index % 6; \
233 if (!s->quarter_sample && index1 == 5) val = 1; \
234 else val = 0; \
235 if (size_table[index1] - val > 0) \
236 val = get_bits(gb, size_table[index1] - val); \
237 else val = 0; \
238 sign = 0 - (val&1); \
239 _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
240 \
241 index1 = index / 6; \
242 if (!s->quarter_sample && index1 == 5) val = 1; \
243 else val = 0; \
244 if (size_table[index1] - val > 0) \
245 val = get_bits(gb, size_table[index1] - val); \
246 else val = 0; \
247 sign = 0 - (val & 1); \
248 _dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign; \
249 }
250
251 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
252 int *dmv_y, int *pred_flag)
253 {
254 int index, index1;
255 int extend_x = 0, extend_y = 0;
256 GetBitContext *gb = &v->s.gb;
257 int bits, esc;
258 int val, sign;
259 const int* offs_tab;
260
261 if (v->numref) {
262 bits = VC1_2REF_MVDATA_VLC_BITS;
263 esc = 125;
264 } else {
265 bits = VC1_1REF_MVDATA_VLC_BITS;
266 esc = 71;
267 }
268 switch (v->dmvrange) {
269 case 1:
270 extend_x = 1;
271 break;
272 case 2:
273 extend_y = 1;
274 break;
275 case 3:
276 extend_x = extend_y = 1;
277 break;
278 }
279 index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
280 if (index == esc) {
281 *dmv_x = get_bits(gb, v->k_x);
282 *dmv_y = get_bits(gb, v->k_y);
283 if (v->numref) {
284 if (pred_flag) {
285 *pred_flag = *dmv_y & 1;
286 *dmv_y = (*dmv_y + *pred_flag) >> 1;
287 } else {
288 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
289 }
290 }
291 }
292 else {
293 if (extend_x)
294 offs_tab = offset_table2;
295 else
296 offs_tab = offset_table1;
297 index1 = (index + 1) % 9;
298 if (index1 != 0) {
299 val = get_bits(gb, index1 + extend_x);
300 sign = 0 -(val & 1);
301 *dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;
302 } else
303 *dmv_x = 0;
304 if (extend_y)
305 offs_tab = offset_table2;
306 else
307 offs_tab = offset_table1;
308 index1 = (index + 1) / 9;
309 if (index1 > v->numref) {
310 val = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);
311 sign = 0 - (val & 1);
312 *dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;
313 } else
314 *dmv_y = 0;
315 if (v->numref && pred_flag)
316 *pred_flag = index1 & 1;
317 }
318 }
319
320 /** Reconstruct motion vector for B-frame and do motion compensation
321 */
322 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
323 int direct, int mode)
324 {
325 if (direct) {
326 ff_vc1_mc_1mv(v, 0);
327 ff_vc1_interp_mc(v);
328 return;
329 }
330 if (mode == BMV_TYPE_INTERPOLATED) {
331 ff_vc1_mc_1mv(v, 0);
332 ff_vc1_interp_mc(v);
333 return;
334 }
335
336 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
337 }
338
339 /** Get predicted DC value for I-frames only
340 * prediction dir: left=0, top=1
341 * @param s MpegEncContext
342 * @param overlap flag indicating that overlap filtering is used
343 * @param pq integer part of picture quantizer
344 * @param[in] n block index in the current MB
345 * @param dc_val_ptr Pointer to DC predictor
346 * @param dir_ptr Prediction direction for use in AC prediction
347 */
348 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
349 int16_t **dc_val_ptr, int *dir_ptr)
350 {
351 int a, b, c, wrap, pred, scale;
352 int16_t *dc_val;
353 static const uint16_t dcpred[32] = {
354 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
355 114, 102, 93, 85, 79, 73, 68, 64,
356 60, 57, 54, 51, 49, 47, 45, 43,
357 41, 39, 38, 37, 35, 34, 33
358 };
359
360 /* find prediction - wmv3_dc_scale always used here in fact */
361 if (n < 4) scale = s->y_dc_scale;
362 else scale = s->c_dc_scale;
363
364 wrap = s->block_wrap[n];
365 dc_val = s->dc_val[0] + s->block_index[n];
366
367 /* B A
368 * C X
369 */
370 c = dc_val[ - 1];
371 b = dc_val[ - 1 - wrap];
372 a = dc_val[ - wrap];
373
374 if (pq < 9 || !overlap) {
375 /* Set outer values */
376 if (s->first_slice_line && (n != 2 && n != 3))
377 b = a = dcpred[scale];
378 if (s->mb_x == 0 && (n != 1 && n != 3))
379 b = c = dcpred[scale];
380 } else {
381 /* Set outer values */
382 if (s->first_slice_line && (n != 2 && n != 3))
383 b = a = 0;
384 if (s->mb_x == 0 && (n != 1 && n != 3))
385 b = c = 0;
386 }
387
388 if (abs(a - b) <= abs(b - c)) {
389 pred = c;
390 *dir_ptr = 1; // left
391 } else {
392 pred = a;
393 *dir_ptr = 0; // top
394 }
395
396 /* update predictor */
397 *dc_val_ptr = &dc_val[0];
398 return pred;
399 }
400
401
402 /** Get predicted DC value
403 * prediction dir: left=0, top=1
404 * @param s MpegEncContext
405 * @param overlap flag indicating that overlap filtering is used
406 * @param pq integer part of picture quantizer
407 * @param[in] n block index in the current MB
408 * @param a_avail flag indicating top block availability
409 * @param c_avail flag indicating left block availability
410 * @param dc_val_ptr Pointer to DC predictor
411 * @param dir_ptr Prediction direction for use in AC prediction
412 */
413 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
414 int a_avail, int c_avail,
415 int16_t **dc_val_ptr, int *dir_ptr)
416 {
417 int a, b, c, wrap, pred;
418 int16_t *dc_val;
419 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
420 int q1, q2 = 0;
421 int dqscale_index;
422
423 wrap = s->block_wrap[n];
424 dc_val = s->dc_val[0] + s->block_index[n];
425
426 /* B A
427 * C X
428 */
429 c = dc_val[ - 1];
430 b = dc_val[ - 1 - wrap];
431 a = dc_val[ - wrap];
432 /* scale predictors if needed */
433 q1 = s->current_picture.qscale_table[mb_pos];
434 dqscale_index = s->y_dc_scale_table[q1] - 1;
435 if (dqscale_index < 0)
436 return 0;
437 if (c_avail && (n != 1 && n != 3)) {
438 q2 = s->current_picture.qscale_table[mb_pos - 1];
439 if (q2 && q2 != q1)
440 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
441 }
442 if (a_avail && (n != 2 && n != 3)) {
443 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
444 if (q2 && q2 != q1)
445 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
446 }
447 if (a_avail && c_avail && (n != 3)) {
448 int off = mb_pos;
449 if (n != 1)
450 off--;
451 if (n != 2)
452 off -= s->mb_stride;
453 q2 = s->current_picture.qscale_table[off];
454 if (q2 && q2 != q1)
455 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
456 }
457
458 if (a_avail && c_avail) {
459 if (abs(a - b) <= abs(b - c)) {
460 pred = c;
461 *dir_ptr = 1; // left
462 } else {
463 pred = a;
464 *dir_ptr = 0; // top
465 }
466 } else if (a_avail) {
467 pred = a;
468 *dir_ptr = 0; // top
469 } else if (c_avail) {
470 pred = c;
471 *dir_ptr = 1; // left
472 } else {
473 pred = 0;
474 *dir_ptr = 1; // left
475 }
476
477 /* update predictor */
478 *dc_val_ptr = &dc_val[0];
479 return pred;
480 }
481
482 /** @} */ // Block group
483
484 /**
485 * @name VC1 Macroblock-level functions in Simple/Main Profiles
486 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
487 * @{
488 */
489
490 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
491 uint8_t **coded_block_ptr)
492 {
493 int xy, wrap, pred, a, b, c;
494
495 xy = s->block_index[n];
496 wrap = s->b8_stride;
497
498 /* B C
499 * A X
500 */
501 a = s->coded_block[xy - 1 ];
502 b = s->coded_block[xy - 1 - wrap];
503 c = s->coded_block[xy - wrap];
504
505 if (b == c) {
506 pred = a;
507 } else {
508 pred = c;
509 }
510
511 /* store value */
512 *coded_block_ptr = &s->coded_block[xy];
513
514 return pred;
515 }
516
517 /**
518 * Decode one AC coefficient
519 * @param v The VC1 context
520 * @param last Last coefficient
521 * @param skip How much zero coefficients to skip
522 * @param value Decoded AC coefficient value
523 * @param codingset set of VLC to decode data
524 * @see 8.1.3.4
525 */
526 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
527 int *value, int codingset)
528 {
529 GetBitContext *gb = &v->s.gb;
530 int index, escape, run = 0, level = 0, lst = 0;
531
532 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
533 if (index != ff_vc1_ac_sizes[codingset] - 1) {
534 run = vc1_index_decode_table[codingset][index][0];
535 level = vc1_index_decode_table[codingset][index][1];
536 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
537 if (get_bits1(gb))
538 level = -level;
539 } else {
540 escape = decode210(gb);
541 if (escape != 2) {
542 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
543 run = vc1_index_decode_table[codingset][index][0];
544 level = vc1_index_decode_table[codingset][index][1];
545 lst = index >= vc1_last_decode_table[codingset];
546 if (escape == 0) {
547 if (lst)
548 level += vc1_last_delta_level_table[codingset][run];
549 else
550 level += vc1_delta_level_table[codingset][run];
551 } else {
552 if (lst)
553 run += vc1_last_delta_run_table[codingset][level] + 1;
554 else
555 run += vc1_delta_run_table[codingset][level] + 1;
556 }
557 if (get_bits1(gb))
558 level = -level;
559 } else {
560 int sign;
561 lst = get_bits1(gb);
562 if (v->s.esc3_level_length == 0) {
563 if (v->pq < 8 || v->dquantfrm) { // table 59
564 v->s.esc3_level_length = get_bits(gb, 3);
565 if (!v->s.esc3_level_length)
566 v->s.esc3_level_length = get_bits(gb, 2) + 8;
567 } else { // table 60
568 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
569 }
570 v->s.esc3_run_length = 3 + get_bits(gb, 2);
571 }
572 run = get_bits(gb, v->s.esc3_run_length);
573 sign = get_bits1(gb);
574 level = get_bits(gb, v->s.esc3_level_length);
575 if (sign)
576 level = -level;
577 }
578 }
579
580 *last = lst;
581 *skip = run;
582 *value = level;
583 }
584
585 /** Decode intra block in intra frames - should be faster than decode_intra_block
586 * @param v VC1Context
587 * @param block block to decode
588 * @param[in] n subblock index
589 * @param coded are AC coeffs present or not
590 * @param codingset set of VLC to decode data
591 */
592 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
593 int coded, int codingset)
594 {
595 GetBitContext *gb = &v->s.gb;
596 MpegEncContext *s = &v->s;
597 int dc_pred_dir = 0; /* Direction of the DC prediction used */
598 int i;
599 int16_t *dc_val;
600 int16_t *ac_val, *ac_val2;
601 int dcdiff;
602
603 /* Get DC differential */
604 if (n < 4) {
605 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
606 } else {
607 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
608 }
609 if (dcdiff < 0) {
610 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
611 return -1;
612 }
613 if (dcdiff) {
614 if (dcdiff == 119 /* ESC index value */) {
615 /* TODO: Optimize */
616 if (v->pq == 1) dcdiff = get_bits(gb, 10);
617 else if (v->pq == 2) dcdiff = get_bits(gb, 9);
618 else dcdiff = get_bits(gb, 8);
619 } else {
620 if (v->pq == 1)
621 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
622 else if (v->pq == 2)
623 dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
624 }
625 if (get_bits1(gb))
626 dcdiff = -dcdiff;
627 }
628
629 /* Prediction */
630 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
631 *dc_val = dcdiff;
632
633 /* Store the quantized DC coeff, used for prediction */
634 if (n < 4) {
635 block[0] = dcdiff * s->y_dc_scale;
636 } else {
637 block[0] = dcdiff * s->c_dc_scale;
638 }
639 /* Skip ? */
640 if (!coded) {
641 goto not_coded;
642 }
643
644 // AC Decoding
645 i = 1;
646
647 {
648 int last = 0, skip, value;
649 const uint8_t *zz_table;
650 int scale;
651 int k;
652
653 scale = v->pq * 2 + v->halfpq;
654
655 if (v->s.ac_pred) {
656 if (!dc_pred_dir)
657 zz_table = v->zz_8x8[2];
658 else
659 zz_table = v->zz_8x8[3];
660 } else
661 zz_table = v->zz_8x8[1];
662
663 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
664 ac_val2 = ac_val;
665 if (dc_pred_dir) // left
666 ac_val -= 16;
667 else // top
668 ac_val -= 16 * s->block_wrap[n];
669
670 while (!last) {
671 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
672 i += skip;
673 if (i > 63)
674 break;
675 block[zz_table[i++]] = value;
676 }
677
678 /* apply AC prediction if needed */
679 if (s->ac_pred) {
680 if (dc_pred_dir) { // left
681 for (k = 1; k < 8; k++)
682 block[k << v->left_blk_sh] += ac_val[k];
683 } else { // top
684 for (k = 1; k < 8; k++)
685 block[k << v->top_blk_sh] += ac_val[k + 8];
686 }
687 }
688 /* save AC coeffs for further prediction */
689 for (k = 1; k < 8; k++) {
690 ac_val2[k] = block[k << v->left_blk_sh];
691 ac_val2[k + 8] = block[k << v->top_blk_sh];
692 }
693
694 /* scale AC coeffs */
695 for (k = 1; k < 64; k++)
696 if (block[k]) {
697 block[k] *= scale;
698 if (!v->pquantizer)
699 block[k] += (block[k] < 0) ? -v->pq : v->pq;
700 }
701
702 if (s->ac_pred) i = 63;
703 }
704
705 not_coded:
706 if (!coded) {
707 int k, scale;
708 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
709 ac_val2 = ac_val;
710
711 i = 0;
712 scale = v->pq * 2 + v->halfpq;
713 memset(ac_val2, 0, 16 * 2);
714 if (dc_pred_dir) { // left
715 ac_val -= 16;
716 if (s->ac_pred)
717 memcpy(ac_val2, ac_val, 8 * 2);
718 } else { // top
719 ac_val -= 16 * s->block_wrap[n];
720 if (s->ac_pred)
721 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
722 }
723
724 /* apply AC prediction if needed */
725 if (s->ac_pred) {
726 if (dc_pred_dir) { //left
727 for (k = 1; k < 8; k++) {
728 block[k << v->left_blk_sh] = ac_val[k] * scale;
729 if (!v->pquantizer && block[k << v->left_blk_sh])
730 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;
731 }
732 } else { // top
733 for (k = 1; k < 8; k++) {
734 block[k << v->top_blk_sh] = ac_val[k + 8] * scale;
735 if (!v->pquantizer && block[k << v->top_blk_sh])
736 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;
737 }
738 }
739 i = 63;
740 }
741 }
742 s->block_last_index[n] = i;
743
744 return 0;
745 }
746
747 /** Decode intra block in intra frames - should be faster than decode_intra_block
748 * @param v VC1Context
749 * @param block block to decode
750 * @param[in] n subblock number
751 * @param coded are AC coeffs present or not
752 * @param codingset set of VLC to decode data
753 * @param mquant quantizer value for this macroblock
754 */
755 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
756 int coded, int codingset, int mquant)
757 {
758 GetBitContext *gb = &v->s.gb;
759 MpegEncContext *s = &v->s;
760 int dc_pred_dir = 0; /* Direction of the DC prediction used */
761 int i;
762 int16_t *dc_val;
763 int16_t *ac_val, *ac_val2;
764 int dcdiff;
765 int a_avail = v->a_avail, c_avail = v->c_avail;
766 int use_pred = s->ac_pred;
767 int scale;
768 int q1, q2 = 0;
769 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
770
771 /* Get DC differential */
772 if (n < 4) {
773 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
774 } else {
775 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
776 }
777 if (dcdiff < 0) {
778 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
779 return -1;
780 }
781 if (dcdiff) {
782 if (dcdiff == 119 /* ESC index value */) {
783 /* TODO: Optimize */
784 if (mquant == 1) dcdiff = get_bits(gb, 10);
785 else if (mquant == 2) dcdiff = get_bits(gb, 9);
786 else dcdiff = get_bits(gb, 8);
787 } else {
788 if (mquant == 1)
789 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
790 else if (mquant == 2)
791 dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
792 }
793 if (get_bits1(gb))
794 dcdiff = -dcdiff;
795 }
796
797 /* Prediction */
798 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
799 *dc_val = dcdiff;
800
801 /* Store the quantized DC coeff, used for prediction */
802 if (n < 4) {
803 block[0] = dcdiff * s->y_dc_scale;
804 } else {
805 block[0] = dcdiff * s->c_dc_scale;
806 }
807
808 //AC Decoding
809 i = 1;
810
811 /* check if AC is needed at all */
812 if (!a_avail && !c_avail)
813 use_pred = 0;
814 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
815 ac_val2 = ac_val;
816
817 scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
818
819 if (dc_pred_dir) // left
820 ac_val -= 16;
821 else // top
822 ac_val -= 16 * s->block_wrap[n];
823
824 q1 = s->current_picture.qscale_table[mb_pos];
825 if (dc_pred_dir && c_avail && mb_pos)
826 q2 = s->current_picture.qscale_table[mb_pos - 1];
827 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
828 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
829 if (dc_pred_dir && n == 1)
830 q2 = q1;
831 if (!dc_pred_dir && n == 2)
832 q2 = q1;
833 if (n == 3)
834 q2 = q1;
835
836 if (coded) {
837 int last = 0, skip, value;
838 const uint8_t *zz_table;
839 int k;
840
841 if (v->s.ac_pred) {
842 if (!use_pred && v->fcm == ILACE_FRAME) {
843 zz_table = v->zzi_8x8;
844 } else {
845 if (!dc_pred_dir) // top
846 zz_table = v->zz_8x8[2];
847 else // left
848 zz_table = v->zz_8x8[3];
849 }
850 } else {
851 if (v->fcm != ILACE_FRAME)
852 zz_table = v->zz_8x8[1];
853 else
854 zz_table = v->zzi_8x8;
855 }
856
857 while (!last) {
858 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
859 i += skip;
860 if (i > 63)
861 break;
862 block[zz_table[i++]] = value;
863 }
864
865 /* apply AC prediction if needed */
866 if (use_pred) {
867 /* scale predictors if needed*/
868 if (q2 && q1 != q2) {
869 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
870 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
871
872 if (q1 < 1)
873 return AVERROR_INVALIDDATA;
874 if (dc_pred_dir) { // left
875 for (k = 1; k < 8; k++)
876 block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
877 } else { // top
878 for (k = 1; k < 8; k++)
879 block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
880 }
881 } else {
882 if (dc_pred_dir) { //left
883 for (k = 1; k < 8; k++)
884 block[k << v->left_blk_sh] += ac_val[k];
885 } else { //top
886 for (k = 1; k < 8; k++)
887 block[k << v->top_blk_sh] += ac_val[k + 8];
888 }
889 }
890 }
891 /* save AC coeffs for further prediction */
892 for (k = 1; k < 8; k++) {
893 ac_val2[k ] = block[k << v->left_blk_sh];
894 ac_val2[k + 8] = block[k << v->top_blk_sh];
895 }
896
897 /* scale AC coeffs */
898 for (k = 1; k < 64; k++)
899 if (block[k]) {
900 block[k] *= scale;
901 if (!v->pquantizer)
902 block[k] += (block[k] < 0) ? -mquant : mquant;
903 }
904
905 if (use_pred) i = 63;
906 } else { // no AC coeffs
907 int k;
908
909 memset(ac_val2, 0, 16 * 2);
910 if (dc_pred_dir) { // left
911 if (use_pred) {
912 memcpy(ac_val2, ac_val, 8 * 2);
913 if (q2 && q1 != q2) {
914 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
915 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
916 if (q1 < 1)
917 return AVERROR_INVALIDDATA;
918 for (k = 1; k < 8; k++)
919 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
920 }
921 }
922 } else { // top
923 if (use_pred) {
924 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
925 if (q2 && q1 != q2) {
926 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
927 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
928 if (q1 < 1)
929 return AVERROR_INVALIDDATA;
930 for (k = 1; k < 8; k++)
931 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
932 }
933 }
934 }
935
936 /* apply AC prediction if needed */
937 if (use_pred) {
938 if (dc_pred_dir) { // left
939 for (k = 1; k < 8; k++) {
940 block[k << v->left_blk_sh] = ac_val2[k] * scale;
941 if (!v->pquantizer && block[k << v->left_blk_sh])
942 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
943 }
944 } else { // top
945 for (k = 1; k < 8; k++) {
946 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
947 if (!v->pquantizer && block[k << v->top_blk_sh])
948 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
949 }
950 }
951 i = 63;
952 }
953 }
954 s->block_last_index[n] = i;
955
956 return 0;
957 }
958
959 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
960 * @param v VC1Context
961 * @param block block to decode
962 * @param[in] n subblock index
963 * @param coded are AC coeffs present or not
964 * @param mquant block quantizer
965 * @param codingset set of VLC to decode data
966 */
967 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
968 int coded, int mquant, int codingset)
969 {
970 GetBitContext *gb = &v->s.gb;
971 MpegEncContext *s = &v->s;
972 int dc_pred_dir = 0; /* Direction of the DC prediction used */
973 int i;
974 int16_t *dc_val;
975 int16_t *ac_val, *ac_val2;
976 int dcdiff;
977 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
978 int a_avail = v->a_avail, c_avail = v->c_avail;
979 int use_pred = s->ac_pred;
980 int scale;
981 int q1, q2 = 0;
982
983 s->bdsp.clear_block(block);
984
985 /* XXX: Guard against dumb values of mquant */
986 mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);
987
988 /* Set DC scale - y and c use the same */
989 s->y_dc_scale = s->y_dc_scale_table[mquant];
990 s->c_dc_scale = s->c_dc_scale_table[mquant];
991
992 /* Get DC differential */
993 if (n < 4) {
994 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
995 } else {
996 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
997 }
998 if (dcdiff < 0) {
999 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
1000 return -1;
1001 }
1002 if (dcdiff) {
1003 if (dcdiff == 119 /* ESC index value */) {
1004 /* TODO: Optimize */
1005 if (mquant == 1) dcdiff = get_bits(gb, 10);
1006 else if (mquant == 2) dcdiff = get_bits(gb, 9);
1007 else dcdiff = get_bits(gb, 8);
1008 } else {
1009 if (mquant == 1)
1010 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
1011 else if (mquant == 2)
1012 dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
1013 }
1014 if (get_bits1(gb))
1015 dcdiff = -dcdiff;
1016 }
1017
1018 /* Prediction */
1019 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
1020 *dc_val = dcdiff;
1021
1022 /* Store the quantized DC coeff, used for prediction */
1023
1024 if (n < 4) {
1025 block[0] = dcdiff * s->y_dc_scale;
1026 } else {
1027 block[0] = dcdiff * s->c_dc_scale;
1028 }
1029
1030 //AC Decoding
1031 i = 1;
1032
1033 /* check if AC is needed at all and adjust direction if needed */
1034 if (!a_avail) dc_pred_dir = 1;
1035 if (!c_avail) dc_pred_dir = 0;
1036 if (!a_avail && !c_avail) use_pred = 0;
1037 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
1038 ac_val2 = ac_val;
1039
1040 scale = mquant * 2 + v->halfpq;
1041
1042 if (dc_pred_dir) //left
1043 ac_val -= 16;
1044 else //top
1045 ac_val -= 16 * s->block_wrap[n];
1046
1047 q1 = s->current_picture.qscale_table[mb_pos];
1048 if (dc_pred_dir && c_avail && mb_pos)
1049 q2 = s->current_picture.qscale_table[mb_pos - 1];
1050 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
1051 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
1052 if (dc_pred_dir && n == 1)
1053 q2 = q1;
1054 if (!dc_pred_dir && n == 2)
1055 q2 = q1;
1056 if (n == 3) q2 = q1;
1057
1058 if (coded) {
1059 int last = 0, skip, value;
1060 int k;
1061
1062 while (!last) {
1063 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
1064 i += skip;
1065 if (i > 63)
1066 break;
1067 if (v->fcm == PROGRESSIVE)
1068 block[v->zz_8x8[0][i++]] = value;
1069 else {
1070 if (use_pred && (v->fcm == ILACE_FRAME)) {
1071 if (!dc_pred_dir) // top
1072 block[v->zz_8x8[2][i++]] = value;
1073 else // left
1074 block[v->zz_8x8[3][i++]] = value;
1075 } else {
1076 block[v->zzi_8x8[i++]] = value;
1077 }
1078 }
1079 }
1080
1081 /* apply AC prediction if needed */
1082 if (use_pred) {
1083 /* scale predictors if needed*/
1084 if (q2 && q1 != q2) {
1085 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
1086 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
1087
1088 if (q1 < 1)
1089 return AVERROR_INVALIDDATA;
1090 if (dc_pred_dir) { // left
1091 for (k = 1; k < 8; k++)
1092 block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1093 } else { //top
1094 for (k = 1; k < 8; k++)
1095 block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1096 }
1097 } else {
1098 if (dc_pred_dir) { // left
1099 for (k = 1; k < 8; k++)
1100 block[k << v->left_blk_sh] += ac_val[k];
1101 } else { // top
1102 for (k = 1; k < 8; k++)
1103 block[k << v->top_blk_sh] += ac_val[k + 8];
1104 }
1105 }
1106 }
1107 /* save AC coeffs for further prediction */
1108 for (k = 1; k < 8; k++) {
1109 ac_val2[k ] = block[k << v->left_blk_sh];
1110 ac_val2[k + 8] = block[k << v->top_blk_sh];
1111 }
1112
1113 /* scale AC coeffs */
1114 for (k = 1; k < 64; k++)
1115 if (block[k]) {
1116 block[k] *= scale;
1117 if (!v->pquantizer)
1118 block[k] += (block[k] < 0) ? -mquant : mquant;
1119 }
1120
1121 if (use_pred) i = 63;
1122 } else { // no AC coeffs
1123 int k;
1124
1125 memset(ac_val2, 0, 16 * 2);
1126 if (dc_pred_dir) { // left
1127 if (use_pred) {
1128 memcpy(ac_val2, ac_val, 8 * 2);
1129 if (q2 && q1 != q2) {
1130 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
1131 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
1132 if (q1 < 1)
1133 return AVERROR_INVALIDDATA;
1134 for (k = 1; k < 8; k++)
1135 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1136 }
1137 }
1138 } else { // top
1139 if (use_pred) {
1140 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1141 if (q2 && q1 != q2) {
1142 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
1143 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
1144 if (q1 < 1)
1145 return AVERROR_INVALIDDATA;
1146 for (k = 1; k < 8; k++)
1147 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1148 }
1149 }
1150 }
1151
1152 /* apply AC prediction if needed */
1153 if (use_pred) {
1154 if (dc_pred_dir) { // left
1155 for (k = 1; k < 8; k++) {
1156 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1157 if (!v->pquantizer && block[k << v->left_blk_sh])
1158 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
1159 }
1160 } else { // top
1161 for (k = 1; k < 8; k++) {
1162 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1163 if (!v->pquantizer && block[k << v->top_blk_sh])
1164 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
1165 }
1166 }
1167 i = 63;
1168 }
1169 }
1170 s->block_last_index[n] = i;
1171
1172 return 0;
1173 }
1174
1175 /** Decode P block
1176 */
1177 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1178 int mquant, int ttmb, int first_block,
1179 uint8_t *dst, int linesize, int skip_block,
1180 int *ttmb_out)
1181 {
1182 MpegEncContext *s = &v->s;
1183 GetBitContext *gb = &s->gb;
1184 int i, j;
1185 int subblkpat = 0;
1186 int scale, off, idx, last, skip, value;
1187 int ttblk = ttmb & 7;
1188 int pat = 0;
1189
1190 s->bdsp.clear_block(block);
1191
1192 if (ttmb == -1) {
1193 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
1194 }
1195 if (ttblk == TT_4X4) {
1196 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1197 }
1198 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1199 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1200 || (!v->res_rtm_flag && !first_block))) {
1201 subblkpat = decode012(gb);
1202 if (subblkpat)
1203 subblkpat ^= 3; // swap decoded pattern bits
1204 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1205 ttblk = TT_8X4;
1206 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1207 ttblk = TT_4X8;
1208 }
1209 scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
1210
1211 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1212 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1213 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1214 ttblk = TT_8X4;
1215 }
1216 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1217 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1218 ttblk = TT_4X8;
1219 }
1220 switch (ttblk) {
1221 case TT_8X8:
1222 pat = 0xF;
1223 i = 0;
1224 last = 0;
1225 while (!last) {
1226 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1227 i += skip;
1228 if (i > 63)
1229 break;
1230 if (!v->fcm)
1231 idx = v->zz_8x8[0][i++];
1232 else
1233 idx = v->zzi_8x8[i++];
1234 block[idx] = value * scale;
1235 if (!v->pquantizer)
1236 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1237 }
1238 if (!skip_block) {
1239 if (i == 1)
1240 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1241 else {
1242 v->vc1dsp.vc1_inv_trans_8x8(block);
1243 s->idsp.add_pixels_clamped(block, dst, linesize);
1244 }
1245 }
1246 break;
1247 case TT_4X4:
1248 pat = ~subblkpat & 0xF;
1249 for (j = 0; j < 4; j++) {
1250 last = subblkpat & (1 << (3 - j));
1251 i = 0;
1252 off = (j & 1) * 4 + (j & 2) * 16;
1253 while (!last) {
1254 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1255 i += skip;
1256 if (i > 15)
1257 break;
1258 if (!v->fcm)
1259 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1260 else
1261 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1262 block[idx + off] = value * scale;
1263 if (!v->pquantizer)
1264 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
1265 }
1266 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1267 if (i == 1)
1268 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1269 else
1270 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1271 }
1272 }
1273 break;
1274 case TT_8X4:
1275 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1276 for (j = 0; j < 2; j++) {
1277 last = subblkpat & (1 << (1 - j));
1278 i = 0;
1279 off = j * 32;
1280 while (!last) {
1281 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1282 i += skip;
1283 if (i > 31)
1284 break;
1285 if (!v->fcm)
1286 idx = v->zz_8x4[i++] + off;
1287 else
1288 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1289 block[idx] = value * scale;
1290 if (!v->pquantizer)
1291 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1292 }
1293 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1294 if (i == 1)
1295 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1296 else
1297 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1298 }
1299 }
1300 break;
1301 case TT_4X8:
1302 pat = ~(subblkpat * 5) & 0xF;
1303 for (j = 0; j < 2; j++) {
1304 last = subblkpat & (1 << (1 - j));
1305 i = 0;
1306 off = j * 4;
1307 while (!last) {
1308 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1309 i += skip;
1310 if (i > 31)
1311 break;
1312 if (!v->fcm)
1313 idx = v->zz_4x8[i++] + off;
1314 else
1315 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1316 block[idx] = value * scale;
1317 if (!v->pquantizer)
1318 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1319 }
1320 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1321 if (i == 1)
1322 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1323 else
1324 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1325 }
1326 }
1327 break;
1328 }
1329 if (ttmb_out)
1330 *ttmb_out |= ttblk << (n * 4);
1331 return pat;
1332 }
1333
1334 /** @} */ // Macroblock group
1335
1336 static const int size_table [6] = { 0, 2, 3, 4, 5, 8 };
1337 static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };
1338
1339 /** Decode one P-frame MB
1340 */
1341 static int vc1_decode_p_mb(VC1Context *v)
1342 {
1343 MpegEncContext *s = &v->s;
1344 GetBitContext *gb = &s->gb;
1345 int i, j;
1346 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1347 int cbp; /* cbp decoding stuff */
1348 int mqdiff, mquant; /* MB quantization */
1349 int ttmb = v->ttfrm; /* MB Transform type */
1350
1351 int mb_has_coeffs = 1; /* last_flag */
1352 int dmv_x, dmv_y; /* Differential MV components */
1353 int index, index1; /* LUT indexes */
1354 int val, sign; /* temp values */
1355 int first_block = 1;
1356 int dst_idx, off;
1357 int skipped, fourmv;
1358 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1359
1360 mquant = v->pq; /* lossy initialization */
1361
1362 if (v->mv_type_is_raw)
1363 fourmv = get_bits1(gb);
1364 else
1365 fourmv = v->mv_type_mb_plane[mb_pos];
1366 if (v->skip_is_raw)
1367 skipped = get_bits1(gb);
1368 else
1369 skipped = v->s.mbskip_table[mb_pos];
1370
1371 if (!fourmv) { /* 1MV mode */
1372 if (!skipped) {
1373 GET_MVDATA(dmv_x, dmv_y);
1374
1375 if (s->mb_intra) {
1376 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1377 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1378 }
1379 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1380 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1381
1382 /* FIXME Set DC val for inter block ? */
1383 if (s->mb_intra && !mb_has_coeffs) {
1384 GET_MQUANT();
1385 s->ac_pred = get_bits1(gb);
1386 cbp = 0;
1387 } else if (mb_has_coeffs) {
1388 if (s->mb_intra)
1389 s->ac_pred = get_bits1(gb);
1390 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1391 GET_MQUANT();
1392 } else {
1393 mquant = v->pq;
1394 cbp = 0;
1395 }
1396 s->current_picture.qscale_table[mb_pos] = mquant;
1397
1398 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1399 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1400 VC1_TTMB_VLC_BITS, 2);
1401 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1402 dst_idx = 0;
1403 for (i = 0; i < 6; i++) {
1404 s->dc_val[0][s->block_index[i]] = 0;
1405 dst_idx += i >> 2;
1406 val = ((cbp >> (5 - i)) & 1);
1407 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1408 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1409 if (s->mb_intra) {
1410 /* check if prediction blocks A and C are available */
1411 v->a_avail = v->c_avail = 0;
1412 if (i == 2 || i == 3 || !s->first_slice_line)
1413 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1414 if (i == 1 || i == 3 || s->mb_x)
1415 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1416
1417 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1418 (i & 4) ? v->codingset2 : v->codingset);
1419 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1420 continue;
1421 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1422 if (v->rangeredfrm)
1423 for (j = 0; j < 64; j++)
1424 s->block[i][j] <<= 1;
1425 s->idsp.put_signed_pixels_clamped(s->block[i],
1426 s->dest[dst_idx] + off,
1427 i & 4 ? s->uvlinesize
1428 : s->linesize);
1429 if (v->pq >= 9 && v->overlap) {
1430 if (v->c_avail)
1431 v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1432 if (v->a_avail)
1433 v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1434 }
1435 block_cbp |= 0xF << (i << 2);
1436 block_intra |= 1 << i;
1437 } else if (val) {
1438 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,
1439 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1440 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1441 block_cbp |= pat << (i << 2);
1442 if (!v->ttmbf && ttmb < 8)
1443 ttmb = -1;
1444 first_block = 0;
1445 }
1446 }
1447 } else { // skipped
1448 s->mb_intra = 0;
1449 for (i = 0; i < 6; i++) {
1450 v->mb_type[0][s->block_index[i]] = 0;
1451 s->dc_val[0][s->block_index[i]] = 0;
1452 }
1453 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1454 s->current_picture.qscale_table[mb_pos] = 0;
1455 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1456 ff_vc1_mc_1mv(v, 0);
1457 }
1458 } else { // 4MV mode
1459 if (!skipped /* unskipped MB */) {
1460 int intra_count = 0, coded_inter = 0;
1461 int is_intra[6], is_coded[6];
1462 /* Get CBPCY */
1463 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1464 for (i = 0; i < 6; i++) {
1465 val = ((cbp >> (5 - i)) & 1);
1466 s->dc_val[0][s->block_index[i]] = 0;
1467 s->mb_intra = 0;
1468 if (i < 4) {
1469 dmv_x = dmv_y = 0;
1470 s->mb_intra = 0;
1471 mb_has_coeffs = 0;
1472 if (val) {
1473 GET_MVDATA(dmv_x, dmv_y);
1474 }
1475 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1476 if (!s->mb_intra)
1477 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1478 intra_count += s->mb_intra;
1479 is_intra[i] = s->mb_intra;
1480 is_coded[i] = mb_has_coeffs;
1481 }
1482 if (i & 4) {
1483 is_intra[i] = (intra_count >= 3);
1484 is_coded[i] = val;
1485 }
1486 if (i == 4)
1487 ff_vc1_mc_4mv_chroma(v, 0);
1488 v->mb_type[0][s->block_index[i]] = is_intra[i];
1489 if (!coded_inter)
1490 coded_inter = !is_intra[i] & is_coded[i];
1491 }
1492 // if there are no coded blocks then don't do anything more
1493 dst_idx = 0;
1494 if (!intra_count && !coded_inter)
1495 goto end;
1496 GET_MQUANT();
1497 s->current_picture.qscale_table[mb_pos] = mquant;
1498 /* test if block is intra and has pred */
1499 {
1500 int intrapred = 0;
1501 for (i = 0; i < 6; i++)
1502 if (is_intra[i]) {
1503 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1504 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1505 intrapred = 1;
1506 break;
1507 }
1508 }
1509 if (intrapred)
1510 s->ac_pred = get_bits1(gb);
1511 else
1512 s->ac_pred = 0;
1513 }
1514 if (!v->ttmbf && coded_inter)
1515 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1516 for (i = 0; i < 6; i++) {
1517 dst_idx += i >> 2;
1518 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1519 s->mb_intra = is_intra[i];
1520 if (is_intra[i]) {
1521 /* check if prediction blocks A and C are available */
1522 v->a_avail = v->c_avail = 0;
1523 if (i == 2 || i == 3 || !s->first_slice_line)
1524 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1525 if (i == 1 || i == 3 || s->mb_x)
1526 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1527
1528 vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,
1529 (i & 4) ? v->codingset2 : v->codingset);
1530 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1531 continue;
1532 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1533 if (v->rangeredfrm)
1534 for (j = 0; j < 64; j++)
1535 s->block[i][j] <<= 1;
1536 s->idsp.put_signed_pixels_clamped(s->block[i],
1537 s->dest[dst_idx] + off,
1538 (i & 4) ? s->uvlinesize
1539 : s->linesize);
1540 if (v->pq >= 9 && v->overlap) {
1541 if (v->c_avail)
1542 v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1543 if (v->a_avail)
1544 v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1545 }
1546 block_cbp |= 0xF << (i << 2);
1547 block_intra |= 1 << i;
1548 } else if (is_coded[i]) {
1549 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1550 first_block, s->dest[dst_idx] + off,
1551 (i & 4) ? s->uvlinesize : s->linesize,
1552 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1553 &block_tt);
1554 block_cbp |= pat << (i << 2);
1555 if (!v->ttmbf && ttmb < 8)
1556 ttmb = -1;
1557 first_block = 0;
1558 }
1559 }
1560 } else { // skipped MB
1561 s->mb_intra = 0;
1562 s->current_picture.qscale_table[mb_pos] = 0;
1563 for (i = 0; i < 6; i++) {
1564 v->mb_type[0][s->block_index[i]] = 0;
1565 s->dc_val[0][s->block_index[i]] = 0;
1566 }
1567 for (i = 0; i < 4; i++) {
1568 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1569 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1570 }
1571 ff_vc1_mc_4mv_chroma(v, 0);
1572 s->current_picture.qscale_table[mb_pos] = 0;
1573 }
1574 }
1575 end:
1576 v->cbp[s->mb_x] = block_cbp;
1577 v->ttblk[s->mb_x] = block_tt;
1578 v->is_intra[s->mb_x] = block_intra;
1579
1580 return 0;
1581 }
1582
1583 /* Decode one macroblock in an interlaced frame p picture */
1584
1585 static int vc1_decode_p_mb_intfr(VC1Context *v)
1586 {
1587 MpegEncContext *s = &v->s;
1588 GetBitContext *gb = &s->gb;
1589 int i;
1590 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1591 int cbp = 0; /* cbp decoding stuff */
1592 int mqdiff, mquant; /* MB quantization */
1593 int ttmb = v->ttfrm; /* MB Transform type */
1594
1595 int mb_has_coeffs = 1; /* last_flag */
1596 int dmv_x, dmv_y; /* Differential MV components */
1597 int val; /* temp value */
1598 int first_block = 1;
1599 int dst_idx, off;
1600 int skipped, fourmv = 0, twomv = 0;
1601 int block_cbp = 0, pat, block_tt = 0;
1602 int idx_mbmode = 0, mvbp;
1603 int stride_y, fieldtx;
1604
1605 mquant = v->pq; /* Lossy initialization */
1606
1607 if (v->skip_is_raw)
1608 skipped = get_bits1(gb);
1609 else
1610 skipped = v->s.mbskip_table[mb_pos];
1611 if (!skipped) {
1612 if (v->fourmvswitch)
1613 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1614 else
1615 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1616 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1617 /* store the motion vector type in a flag (useful later) */
1618 case MV_PMODE_INTFR_4MV:
1619 fourmv = 1;
1620 v->blk_mv_type[s->block_index[0]] = 0;
1621 v->blk_mv_type[s->block_index[1]] = 0;
1622 v->blk_mv_type[s->block_index[2]] = 0;
1623 v->blk_mv_type[s->block_index[3]] = 0;
1624 break;
1625 case MV_PMODE_INTFR_4MV_FIELD:
1626 fourmv = 1;
1627 v->blk_mv_type[s->block_index[0]] = 1;
1628 v->blk_mv_type[s->block_index[1]] = 1;
1629 v->blk_mv_type[s->block_index[2]] = 1;
1630 v->blk_mv_type[s->block_index[3]] = 1;
1631 break;
1632 case MV_PMODE_INTFR_2MV_FIELD:
1633 twomv = 1;
1634 v->blk_mv_type[s->block_index[0]] = 1;
1635 v->blk_mv_type[s->block_index[1]] = 1;
1636 v->blk_mv_type[s->block_index[2]] = 1;
1637 v->blk_mv_type[s->block_index[3]] = 1;
1638 break;
1639 case MV_PMODE_INTFR_1MV:
1640 v->blk_mv_type[s->block_index[0]] = 0;
1641 v->blk_mv_type[s->block_index[1]] = 0;
1642 v->blk_mv_type[s->block_index[2]] = 0;
1643 v->blk_mv_type[s->block_index[3]] = 0;
1644 break;
1645 }
1646 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1647 for (i = 0; i < 4; i++) {
1648 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1649 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1650 }
1651 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1652 s->mb_intra = 1;
1653 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1654 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1655 mb_has_coeffs = get_bits1(gb);
1656 if (mb_has_coeffs)
1657 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1658 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1659 GET_MQUANT();
1660 s->current_picture.qscale_table[mb_pos] = mquant;
1661 /* Set DC scale - y and c use the same (not sure if necessary here) */
1662 s->y_dc_scale = s->y_dc_scale_table[mquant];
1663 s->c_dc_scale = s->c_dc_scale_table[mquant];
1664 dst_idx = 0;
1665 for (i = 0; i < 6; i++) {
1666 v->a_avail = v->c_avail = 0;
1667 v->mb_type[0][s->block_index[i]] = 1;
1668 s->dc_val[0][s->block_index[i]] = 0;
1669 dst_idx += i >> 2;
1670 val = ((cbp >> (5 - i)) & 1);
1671 if (i == 2 || i == 3 || !s->first_slice_line)
1672 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1673 if (i == 1 || i == 3 || s->mb_x)
1674 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1675
1676 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1677 (i & 4) ? v->codingset2 : v->codingset);
1678 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1679 continue;
1680 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1681 if (i < 4) {
1682 stride_y = s->linesize << fieldtx;
1683 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1684 } else {
1685 stride_y = s->uvlinesize;
1686 off = 0;
1687 }
1688 s->idsp.put_signed_pixels_clamped(s->block[i],
1689 s->dest[dst_idx] + off,
1690 stride_y);
1691 //TODO: loop filter
1692 }
1693
1694 } else { // inter MB
1695 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1696 if (mb_has_coeffs)
1697 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1698 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1699 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1700 } else {
1701 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1702 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1703 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1704 }
1705 }
1706 s->mb_intra = v->is_intra[s->mb_x] = 0;
1707 for (i = 0; i < 6; i++)
1708 v->mb_type[0][s->block_index[i]] = 0;
1709 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1710 /* for all motion vector read MVDATA and motion compensate each block */
1711 dst_idx = 0;
1712 if (fourmv) {
1713 mvbp = v->fourmvbp;
1714 for (i = 0; i < 6; i++) {
1715 if (i < 4) {
1716 dmv_x = dmv_y = 0;
1717 val = ((mvbp >> (3 - i)) & 1);
1718 if (val) {
1719 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1720 }
1721 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1722 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1723 } else if (i == 4) {
1724 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1725 }
1726 }
1727 } else if (twomv) {
1728 mvbp = v->twomvbp;
1729 dmv_x = dmv_y = 0;
1730 if (mvbp & 2) {
1731 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1732 }
1733 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1734 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1735 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1736 dmv_x = dmv_y = 0;
1737 if (mvbp & 1) {
1738 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1739 }
1740 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1741 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1742 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1743 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1744 } else {
1745 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1746 dmv_x = dmv_y = 0;
1747 if (mvbp) {
1748 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1749 }
1750 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1751 ff_vc1_mc_1mv(v, 0);
1752 }
1753 if (cbp)
1754 GET_MQUANT(); // p. 227
1755 s->current_picture.qscale_table[mb_pos] = mquant;
1756 if (!v->ttmbf && cbp)
1757 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1758 for (i = 0; i < 6; i++) {
1759 s->dc_val[0][s->block_index[i]] = 0;
1760 dst_idx += i >> 2;
1761 val = ((cbp >> (5 - i)) & 1);
1762 if (!fieldtx)
1763 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1764 else
1765 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1766 if (val) {
1767 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1768 first_block, s->dest[dst_idx] + off,
1769 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1770 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1771 block_cbp |= pat << (i << 2);
1772 if (!v->ttmbf && ttmb < 8)
1773 ttmb = -1;
1774 first_block = 0;
1775 }
1776 }
1777 }
1778 } else { // skipped
1779 s->mb_intra = v->is_intra[s->mb_x] = 0;
1780 for (i = 0; i < 6; i++) {
1781 v->mb_type[0][s->block_index[i]] = 0;
1782 s->dc_val[0][s->block_index[i]] = 0;
1783 }
1784 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1785 s->current_picture.qscale_table[mb_pos] = 0;
1786 v->blk_mv_type[s->block_index[0]] = 0;
1787 v->blk_mv_type[s->block_index[1]] = 0;
1788 v->blk_mv_type[s->block_index[2]] = 0;
1789 v->blk_mv_type[s->block_index[3]] = 0;
1790 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1791 ff_vc1_mc_1mv(v, 0);
1792 }
1793 if (s->mb_x == s->mb_width - 1)
1794 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);
1795 return 0;
1796 }
1797
1798 static int vc1_decode_p_mb_intfi(VC1Context *v)
1799 {
1800 MpegEncContext *s = &v->s;
1801 GetBitContext *gb = &s->gb;
1802 int i;
1803 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1804 int cbp = 0; /* cbp decoding stuff */
1805 int mqdiff, mquant; /* MB quantization */
1806 int ttmb = v->ttfrm; /* MB Transform type */
1807
1808 int mb_has_coeffs = 1; /* last_flag */
1809 int dmv_x, dmv_y; /* Differential MV components */
1810 int val; /* temp values */
1811 int first_block = 1;
1812 int dst_idx, off;
1813 int pred_flag;
1814 int block_cbp = 0, pat, block_tt = 0;
1815 int idx_mbmode = 0;
1816
1817 mquant = v->pq; /* Lossy initialization */
1818
1819 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1820 if (idx_mbmode <= 1) { // intra MB
1821 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1822 s->mb_intra = 1;
1823 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1824 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1825 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1826 GET_MQUANT();
1827 s->current_picture.qscale_table[mb_pos] = mquant;
1828 /* Set DC scale - y and c use the same (not sure if necessary here) */
1829 s->y_dc_scale = s->y_dc_scale_table[mquant];
1830 s->c_dc_scale = s->c_dc_scale_table[mquant];
1831 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1832 mb_has_coeffs = idx_mbmode & 1;
1833 if (mb_has_coeffs)
1834 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1835 dst_idx = 0;
1836 for (i = 0; i < 6; i++) {
1837 v->a_avail = v->c_avail = 0;
1838 v->mb_type[0][s->block_index[i]] = 1;
1839 s->dc_val[0][s->block_index[i]] = 0;
1840 dst_idx += i >> 2;
1841 val = ((cbp >> (5 - i)) & 1);
1842 if (i == 2 || i == 3 || !s->first_slice_line)
1843 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1844 if (i == 1 || i == 3 || s->mb_x)
1845 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1846
1847 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1848 (i & 4) ? v->codingset2 : v->codingset);
1849 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1850 continue;
1851 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1852 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1853 s->idsp.put_signed_pixels_clamped(s->block[i],
1854 s->dest[dst_idx] + off,
1855 (i & 4) ? s->uvlinesize
1856 : s->linesize);
1857 // TODO: loop filter
1858 }
1859 } else {
1860 s->mb_intra = v->is_intra[s->mb_x] = 0;
1861 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1862 for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
1863 if (idx_mbmode <= 5) { // 1-MV
1864 dmv_x = dmv_y = pred_flag = 0;
1865 if (idx_mbmode & 1) {
1866 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1867 }
1868 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1869 ff_vc1_mc_1mv(v, 0);
1870 mb_has_coeffs = !(idx_mbmode & 2);
1871 } else { // 4-MV
1872 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1873 for (i = 0; i < 6; i++) {
1874 if (i < 4) {
1875 dmv_x = dmv_y = pred_flag = 0;
1876 val = ((v->fourmvbp >> (3 - i)) & 1);
1877 if (val) {
1878 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1879 }
1880 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1881 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1882 } else if (i == 4)
1883 ff_vc1_mc_4mv_chroma(v, 0);
1884 }
1885 mb_has_coeffs = idx_mbmode & 1;
1886 }
1887 if (mb_has_coeffs)
1888 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1889 if (cbp) {
1890 GET_MQUANT();
1891 }
1892 s->current_picture.qscale_table[mb_pos] = mquant;
1893 if (!v->ttmbf && cbp) {
1894 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1895 }
1896 dst_idx = 0;
1897 for (i = 0; i < 6; i++) {
1898 s->dc_val[0][s->block_index[i]] = 0;
1899 dst_idx += i >> 2;
1900 val = ((cbp >> (5 - i)) & 1);
1901 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1902 if (val) {
1903 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1904 first_block, s->dest[dst_idx] + off,
1905 (i & 4) ? s->uvlinesize : s->linesize,
1906 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1907 &block_tt);
1908 block_cbp |= pat << (i << 2);
1909 if (!v->ttmbf && ttmb < 8) ttmb = -1;
1910 first_block = 0;
1911 }
1912 }
1913 }
1914 if (s->mb_x == s->mb_width - 1)
1915 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
1916 return 0;
1917 }
1918
1919 /** Decode one B-frame MB (in Main profile)
1920 */
1921 static void vc1_decode_b_mb(VC1Context *v)
1922 {
1923 MpegEncContext *s = &v->s;
1924 GetBitContext *gb = &s->gb;
1925 int i, j;
1926 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1927 int cbp = 0; /* cbp decoding stuff */
1928 int mqdiff, mquant; /* MB quantization */
1929 int ttmb = v->ttfrm; /* MB Transform type */
1930 int mb_has_coeffs = 0; /* last_flag */
1931 int index, index1; /* LUT indexes */
1932 int val, sign; /* temp values */
1933 int first_block = 1;
1934 int dst_idx, off;
1935 int skipped, direct;
1936 int dmv_x[2], dmv_y[2];
1937 int bmvtype = BMV_TYPE_BACKWARD;
1938
1939 mquant = v->pq; /* lossy initialization */
1940 s->mb_intra = 0;
1941
1942 if (v->dmb_is_raw)
1943 direct = get_bits1(gb);
1944 else
1945 direct = v->direct_mb_plane[mb_pos];
1946 if (v->skip_is_raw)
1947 skipped = get_bits1(gb);
1948 else
1949 skipped = v->s.mbskip_table[mb_pos];
1950
1951 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1952 for (i = 0; i < 6; i++) {
1953 v->mb_type[0][s->block_index[i]] = 0;
1954 s->dc_val[0][s->block_index[i]] = 0;
1955 }
1956 s->current_picture.qscale_table[mb_pos] = 0;
1957
1958 if (!direct) {
1959 if (!skipped) {
1960 GET_MVDATA(dmv_x[0], dmv_y[0]);
1961 dmv_x[1] = dmv_x[0];
1962 dmv_y[1] = dmv_y[0];
1963 }
1964 if (skipped || !s->mb_intra) {
1965 bmvtype = decode012(gb);
1966 switch (bmvtype) {
1967 case 0:
1968 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1969 break;
1970 case 1:
1971 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1972 break;
1973 case 2:
1974 bmvtype = BMV_TYPE_INTERPOLATED;
1975 dmv_x[0] = dmv_y[0] = 0;
1976 }
1977 }
1978 }
1979 for (i = 0; i < 6; i++)
1980 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1981
1982 if (skipped) {
1983 if (direct)
1984 bmvtype = BMV_TYPE_INTERPOLATED;
1985 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1986 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1987 return;
1988 }
1989 if (direct) {
1990 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1991 GET_MQUANT();
1992 s->mb_intra = 0;
1993 s->current_picture.qscale_table[mb_pos] = mquant;
1994 if (!v->ttmbf)
1995 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1996 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1997 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1998 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1999 } else {
2000 if (!mb_has_coeffs && !s->mb_intra) {
2001 /* no coded blocks - effectively skipped */
2002 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
2003 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
2004 return;
2005 }
2006 if (s->mb_intra && !mb_has_coeffs) {
2007 GET_MQUANT();
2008 s->current_picture.qscale_table[mb_pos] = mquant;
2009 s->ac_pred = get_bits1(gb);
2010 cbp = 0;
2011 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
2012 } else {
2013 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2014 GET_MVDATA(dmv_x[0], dmv_y[0]);
2015 if (!mb_has_coeffs) {
2016 /* interpolated skipped block */
2017 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
2018 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
2019 return;
2020 }
2021 }
2022 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
2023 if (!s->mb_intra) {
2024 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
2025 }
2026 if (s->mb_intra)
2027 s->ac_pred = get_bits1(gb);
2028 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2029 GET_MQUANT();
2030 s->current_picture.qscale_table[mb_pos] = mquant;
2031 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
2032 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2033 }
2034 }
2035 dst_idx = 0;
2036 for (i = 0; i < 6; i++) {
2037 s->dc_val[0][s->block_index[i]] = 0;
2038 dst_idx += i >> 2;
2039 val = ((cbp >> (5 - i)) & 1);
2040 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2041 v->mb_type[0][s->block_index[i]] = s->mb_intra;
2042 if (s->mb_intra) {
2043 /* check if prediction blocks A and C are available */
2044 v->a_avail = v->c_avail = 0;
2045 if (i == 2 || i == 3 || !s->first_slice_line)
2046 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2047 if (i == 1 || i == 3 || s->mb_x)
2048 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2049
2050 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2051 (i & 4) ? v->codingset2 : v->codingset);
2052 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2053 continue;
2054 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2055 if (v->rangeredfrm)
2056 for (j = 0; j < 64; j++)
2057 s->block[i][j] <<= 1;
2058 s->idsp.put_signed_pixels_clamped(s->block[i],
2059 s->dest[dst_idx] + off,
2060 i & 4 ? s->uvlinesize
2061 : s->linesize);
2062 } else if (val) {
2063 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2064 first_block, s->dest[dst_idx] + off,
2065 (i & 4) ? s->uvlinesize : s->linesize,
2066 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2067 if (!v->ttmbf && ttmb < 8)
2068 ttmb = -1;
2069 first_block = 0;
2070 }
2071 }
2072 }
2073
2074 /** Decode one B-frame MB (in interlaced field B picture)
2075 */
2076 static void vc1_decode_b_mb_intfi(VC1Context *v)
2077 {
2078 MpegEncContext *s = &v->s;
2079 GetBitContext *gb = &s->gb;
2080 int i, j;
2081 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2082 int cbp = 0; /* cbp decoding stuff */
2083 int mqdiff, mquant; /* MB quantization */
2084 int ttmb = v->ttfrm; /* MB Transform type */
2085 int mb_has_coeffs = 0; /* last_flag */
2086 int val; /* temp value */
2087 int first_block = 1;
2088 int dst_idx, off;
2089 int fwd;
2090 int dmv_x[2], dmv_y[2], pred_flag[2];
2091 int bmvtype = BMV_TYPE_BACKWARD;
2092 int idx_mbmode, interpmvp;
2093
2094 mquant = v->pq; /* Lossy initialization */
2095 s->mb_intra = 0;
2096
2097 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2098 if (idx_mbmode <= 1) { // intra MB
2099 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2100 s->mb_intra = 1;
2101 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2102 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2103 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2104 GET_MQUANT();
2105 s->current_picture.qscale_table[mb_pos] = mquant;
2106 /* Set DC scale - y and c use the same (not sure if necessary here) */
2107 s->y_dc_scale = s->y_dc_scale_table[mquant];
2108 s->c_dc_scale = s->c_dc_scale_table[mquant];
2109 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2110 mb_has_coeffs = idx_mbmode & 1;
2111 if (mb_has_coeffs)
2112 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2113 dst_idx = 0;
2114 for (i = 0; i < 6; i++) {
2115 v->a_avail = v->c_avail = 0;
2116 v->mb_type[0][s->block_index[i]] = 1;
2117 s->dc_val[0][s->block_index[i]] = 0;
2118 dst_idx += i >> 2;
2119 val = ((cbp >> (5 - i)) & 1);
2120 if (i == 2 || i == 3 || !s->first_slice_line)
2121 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2122 if (i == 1 || i == 3 || s->mb_x)
2123 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2124
2125 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2126 (i & 4) ? v->codingset2 : v->codingset);
2127 if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2128 continue;
2129 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2130 if (v->rangeredfrm)
2131 for (j = 0; j < 64; j++)
2132 s->block[i][j] <<= 1;
2133 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2134 s->idsp.put_signed_pixels_clamped(s->block[i],
2135 s->dest[dst_idx] + off,
2136 (i & 4) ? s->uvlinesize
2137 : s->linesize);
2138 // TODO: yet to perform loop filter
2139 }
2140 } else {
2141 s->mb_intra = v->is_intra[s->mb_x] = 0;
2142 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2143 for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
2144 if (v->fmb_is_raw)
2145 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2146 else
2147 fwd = v->forward_mb_plane[mb_pos];
2148 if (idx_mbmode <= 5) { // 1-MV
2149 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2150 pred_flag[0] = pred_flag[1] = 0;
2151 if (fwd)
2152 bmvtype = BMV_TYPE_FORWARD;
2153 else {
2154 bmvtype = decode012(gb);
2155 switch (bmvtype) {
2156 case 0:
2157 bmvtype = BMV_TYPE_BACKWARD;
2158 break;
2159 case 1:
2160 bmvtype = BMV_TYPE_DIRECT;
2161 break;
2162 case 2:
2163 bmvtype = BMV_TYPE_INTERPOLATED;
2164 interpmvp = get_bits1(gb);
2165 }
2166 }
2167 v->bmvtype = bmvtype;
2168 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2169 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2170 }
2171 if (bmvtype == BMV_TYPE_INTERPOLATED && interpmvp) {
2172 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2173 }
2174 if (bmvtype == BMV_TYPE_DIRECT) {
2175 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2176 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2177 }
2178 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2179 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2180 mb_has_coeffs = !(idx_mbmode & 2);
2181 } else { // 4-MV
2182 if (fwd)
2183 bmvtype = BMV_TYPE_FORWARD;
2184 v->bmvtype = bmvtype;
2185 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2186 for (i = 0; i < 6; i++) {
2187 if (i < 4) {
2188 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2189 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2190 val = ((v->fourmvbp >> (3 - i)) & 1);
2191 if (val) {
2192 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2193 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2194 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2195 }
2196 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2197 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2198 } else if (i == 4)
2199 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2200 }
2201 mb_has_coeffs = idx_mbmode & 1;
2202 }
2203 if (mb_has_coeffs)
2204 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2205 if (cbp) {
2206 GET_MQUANT();
2207 }
2208 s->current_picture.qscale_table[mb_pos] = mquant;
2209 if (!v->ttmbf && cbp) {
2210 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2211 }
2212 dst_idx = 0;
2213 for (i = 0; i < 6; i++) {
2214 s->dc_val[0][s->block_index[i]] = 0;
2215 dst_idx += i >> 2;
2216 val = ((cbp >> (5 - i)) & 1);
2217 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2218 if (val) {
2219 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2220 first_block, s->dest[dst_idx] + off,
2221 (i & 4) ? s->uvlinesize : s->linesize,
2222 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2223 if (!v->ttmbf && ttmb < 8)
2224 ttmb = -1;
2225 first_block = 0;
2226 }
2227 }
2228 }
2229 }
2230
2231 /** Decode one B-frame MB (in interlaced frame B picture)
2232 */
2233 static int vc1_decode_b_mb_intfr(VC1Context *v)
2234 {
2235 MpegEncContext *s = &v->s;
2236 GetBitContext *gb = &s->gb;
2237 int i, j;
2238 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2239 int cbp = 0; /* cbp decoding stuff */
2240 int mqdiff, mquant; /* MB quantization */
2241 int ttmb = v->ttfrm; /* MB Transform type */
2242 int mvsw = 0; /* motion vector switch */
2243 int mb_has_coeffs = 1; /* last_flag */
2244 int dmv_x, dmv_y; /* Differential MV components */
2245 int val; /* temp value */
2246 int first_block = 1;
2247 int dst_idx, off;
2248 int skipped, direct, twomv = 0;
2249 int block_cbp = 0, pat, block_tt = 0;
2250 int idx_mbmode = 0, mvbp;
2251 int stride_y, fieldtx;
2252 int bmvtype = BMV_TYPE_BACKWARD;
2253 int dir, dir2;
2254
2255 mquant = v->pq; /* Lossy initialization */
2256 s->mb_intra = 0;
2257 if (v->skip_is_raw)
2258 skipped = get_bits1(gb);
2259 else
2260 skipped = v->s.mbskip_table[mb_pos];
2261
2262 if (!skipped) {
2263 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2264 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2265 twomv = 1;
2266 v->blk_mv_type[s->block_index[0]] = 1;
2267 v->blk_mv_type[s->block_index[1]] = 1;
2268 v->blk_mv_type[s->block_index[2]] = 1;
2269 v->blk_mv_type[s->block_index[3]] = 1;
2270 } else {
2271 v->blk_mv_type[s->block_index[0]] = 0;
2272 v->blk_mv_type[s->block_index[1]] = 0;
2273 v->blk_mv_type[s->block_index[2]] = 0;
2274 v->blk_mv_type[s->block_index[3]] = 0;
2275 }
2276 }
2277
2278 if (v->dmb_is_raw)
2279 direct = get_bits1(gb);
2280 else
2281 direct = v->direct_mb_plane[mb_pos];
2282
2283 if (direct) {
2284 s->mv[0][0][0] = s->current_picture.motion_val[0][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 0, s->quarter_sample);
2285 s->mv[0][0][1] = s->current_picture.motion_val[0][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 0, s->quarter_sample);
2286 s->mv[1][0][0] = s->current_picture.motion_val[1][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 1, s->quarter_sample);
2287 s->mv[1][0][1] = s->current_picture.motion_val[1][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 1, s->quarter_sample);
2288
2289 if (twomv) {
2290 s->mv[0][2][0] = s->current_picture.motion_val[0][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 0, s->quarter_sample);
2291 s->mv[0][2][1] = s->current_picture.motion_val[0][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 0, s->quarter_sample);
2292 s->mv[1][2][0] = s->current_picture.motion_val[1][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 1, s->quarter_sample);
2293 s->mv[1][2][1] = s->current_picture.motion_val[1][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 1, s->quarter_sample);
2294
2295 for (i = 1; i < 4; i += 2) {
2296 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2297 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2298 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2299 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2300 }
2301 } else {
2302 for (i = 1; i < 4; i++) {
2303 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2304 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2305 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2306 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2307 }
2308 }
2309 }
2310
2311 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2312 for (i = 0; i < 4; i++) {
2313 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2314 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2315 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2316 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2317 }
2318 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2319 s->mb_intra = 1;
2320 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2321 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2322 mb_has_coeffs = get_bits1(gb);
2323 if (mb_has_coeffs)
2324 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2325 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2326 GET_MQUANT();
2327 s->current_picture.qscale_table[mb_pos] = mquant;
2328 /* Set DC scale - y and c use the same (not sure if necessary here) */
2329 s->y_dc_scale = s->y_dc_scale_table[mquant];
2330 s->c_dc_scale = s->c_dc_scale_table[mquant];
2331 dst_idx = 0;
2332 for (i = 0; i < 6; i++) {
2333 v->a_avail = v->c_avail = 0;
2334 v->mb_type[0][s->block_index[i]] = 1;
2335 s->dc_val[0][s->block_index[i]] = 0;
2336 dst_idx += i >> 2;
2337 val = ((cbp >> (5 - i)) & 1);
2338 if (i == 2 || i == 3 || !s->first_slice_line)
2339 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2340 if (i == 1 || i == 3 || s->mb_x)
2341 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2342
2343 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2344 (i & 4) ? v->codingset2 : v->codingset);
2345 if (i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2346 continue;
2347 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2348 if (i < 4) {
2349 stride_y = s->linesize << fieldtx;
2350 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2351 } else {
2352 stride_y = s->uvlinesize;
2353 off = 0;
2354 }
2355 s->idsp.put_signed_pixels_clamped(s->block[i],
2356 s->dest[dst_idx] + off,
2357 stride_y);
2358 }
2359 } else {
2360 s->mb_intra = v->is_intra[s->mb_x] = 0;
2361 if (!direct) {
2362 if (skipped || !s->mb_intra) {
2363 bmvtype = decode012(gb);
2364 switch (bmvtype) {
2365 case 0:
2366 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2367 break;
2368 case 1:
2369 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2370 break;
2371 case 2:
2372 bmvtype = BMV_TYPE_INTERPOLATED;
2373 }
2374 }
2375
2376 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2377 mvsw = get_bits1(gb);
2378 }
2379
2380 if (!skipped) { // inter MB
2381 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2382 if (mb_has_coeffs)
2383 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2384 if (!direct) {
2385 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2386 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2387 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2388 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2389 }
2390 }
2391
2392 for (i = 0; i < 6; i++)
2393 v->mb_type[0][s->block_index[i]] = 0;
2394 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2395 /* for all motion vector read MVDATA and motion compensate each block */
2396 dst_idx = 0;
2397 if (direct) {
2398 if (twomv) {
2399 for (i = 0; i < 4; i++) {
2400 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2401 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2402 }
2403 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2404 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2405 } else {
2406 ff_vc1_mc_1mv(v, 0);
2407 ff_vc1_interp_mc(v);
2408 }
2409 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2410 mvbp = v->fourmvbp;
2411 for (i = 0; i < 4; i++) {
2412 dir = i==1 || i==3;
2413 dmv_x = dmv_y = 0;
2414 val = ((mvbp >> (3 - i)) & 1);
2415 if (val)
2416 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2417 j = i > 1 ? 2 : 0;
2418 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2419 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2420 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2421 }
2422
2423 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2424 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2425 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2426 mvbp = v->twomvbp;
2427 dmv_x = dmv_y = 0;
2428 if (mvbp & 2)
2429 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2430
2431 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2432 ff_vc1_mc_1mv(v, 0);
2433
2434 dmv_x = dmv_y = 0;
2435 if (mvbp & 1)
2436 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2437
2438 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2439 ff_vc1_interp_mc(v);
2440 } else if (twomv) {
2441 dir = bmvtype == BMV_TYPE_BACKWARD;
2442 dir2 = dir;
2443 if (mvsw)
2444 dir2 = !dir;
2445 mvbp = v->twomvbp;
2446 dmv_x = dmv_y = 0;
2447 if (mvbp & 2)
2448 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2449 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2450
2451 dmv_x = dmv_y = 0;
2452 if (mvbp & 1)
2453 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2454 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2455
2456 if (mvsw) {
2457 for (i = 0; i < 2; i++) {
2458 s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
2459 s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
2460 s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
2461 s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
2462 }
2463 } else {
2464 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2465 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2466 }
2467
2468 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2469 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2470 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2471 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2472 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2473 } else {
2474 dir = bmvtype == BMV_TYPE_BACKWARD;
2475
2476 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2477 dmv_x = dmv_y = 0;
2478 if (mvbp)
2479 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2480
2481 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2482 v->blk_mv_type[s->block_index[0]] = 1;
2483 v->blk_mv_type[s->block_index[1]] = 1;
2484 v->blk_mv_type[s->block_index[2]] = 1;
2485 v->blk_mv_type[s->block_index[3]] = 1;
2486 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2487 for (i = 0; i < 2; i++) {
2488 s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
2489 s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
2490 }
2491 ff_vc1_mc_1mv(v, dir);
2492 }
2493
2494 if (cbp)
2495 GET_MQUANT(); // p. 227
2496 s->current_picture.qscale_table[mb_pos] = mquant;
2497 if (!v->ttmbf && cbp)
2498 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2499 for (i = 0; i < 6; i++) {
2500 s->dc_val[0][s->block_index[i]] = 0;
2501 dst_idx += i >> 2;
2502 val = ((cbp >> (5 - i)) & 1);
2503 if (!fieldtx)
2504 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2505 else
2506 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2507 if (val) {
2508 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2509 first_block, s->dest[dst_idx] + off,
2510 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2511 (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2512 block_cbp |= pat << (i << 2);
2513 if (!v->ttmbf && ttmb < 8)
2514 ttmb = -1;
2515 first_block = 0;
2516 }
2517 }
2518
2519 } else { // skipped
2520 dir = 0;
2521 for (i = 0; i < 6; i++) {
2522 v->mb_type[0][s->block_index[i]] = 0;
2523 s->dc_val[0][s->block_index[i]] = 0;
2524 }
2525 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2526 s->current_picture.qscale_table[mb_pos] = 0;
2527 v->blk_mv_type[s->block_index[0]] = 0;
2528 v->blk_mv_type[s->block_index[1]] = 0;
2529 v->blk_mv_type[s->block_index[2]] = 0;
2530 v->blk_mv_type[s->block_index[3]] = 0;
2531
2532 if (!direct) {
2533 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2534 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2535 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2536 } else {
2537 dir = bmvtype == BMV_TYPE_BACKWARD;
2538 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2539 if (mvsw) {
2540 int dir2 = dir;
2541 if (mvsw)
2542 dir2 = !dir;
2543 for (i = 0; i < 2; i++) {
2544 s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
2545 s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
2546 s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
2547 s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
2548 }
2549 } else {
2550 v->blk_mv_type[s->block_index[0]] = 1;
2551 v->blk_mv_type[s->block_index[1]] = 1;
2552 v->blk_mv_type[s->block_index[2]] = 1;
2553 v->blk_mv_type[s->block_index[3]] = 1;
2554 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2555 for (i = 0; i < 2; i++) {
2556 s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
2557 s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
2558 }
2559 }
2560 }
2561 }
2562
2563 ff_vc1_mc_1mv(v, dir);
2564 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2565 ff_vc1_interp_mc(v);
2566 }
2567 }
2568 }
2569 if (s->mb_x == s->mb_width - 1)
2570 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
2571 v->cbp[s->mb_x] = block_cbp;
2572 v->ttblk[s->mb_x] = block_tt;
2573 return 0;
2574 }
2575
2576 /** Decode blocks of I-frame
2577 */
2578 static void vc1_decode_i_blocks(VC1Context *v)
2579 {
2580 int k, j;
2581 MpegEncContext *s = &v->s;
2582 int cbp, val;
2583 uint8_t *coded_val;
2584 int mb_pos;
2585
2586 /* select coding mode used for VLC tables selection */
2587 switch (v->y_ac_table_index) {
2588 case 0:
2589 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2590 break;
2591 case 1:
2592 v->codingset = CS_HIGH_MOT_INTRA;
2593 break;
2594 case 2:
2595 v->codingset = CS_MID_RATE_INTRA;
2596 break;
2597 }
2598
2599 switch (v->c_ac_table_index) {
2600 case 0:
2601 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2602 break;
2603 case 1:
2604 v->codingset2 = CS_HIGH_MOT_INTER;
2605 break;
2606 case 2:
2607 v->codingset2 = CS_MID_RATE_INTER;
2608 break;
2609 }
2610
2611 /* Set DC scale - y and c use the same */
2612 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2613 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2614
2615 //do frame decode
2616 s->mb_x = s->mb_y = 0;
2617 s->mb_intra = 1;
2618 s->first_slice_line = 1;
2619 for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {
2620 s->mb_x = 0;
2621 init_block_index(v);
2622 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2623 uint8_t *dst[6];
2624 ff_update_block_index(s);
2625 dst[0] = s->dest[0];
2626 dst[1] = dst[0] + 8;
2627 dst[2] = s->dest[0] + s->linesize * 8;
2628 dst[3] = dst[2] + 8;
2629 dst[4] = s->dest[1];
2630 dst[5] = s->dest[2];
2631 s->bdsp.clear_blocks(s->block[0]);
2632 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2633 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2634 s->current_picture.qscale_table[mb_pos] = v->pq;
2635 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2636 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2637
2638 // do actual MB decoding and displaying
2639 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2640 v->s.ac_pred = get_bits1(&v->s.gb);
2641
2642 for (k = 0; k < 6; k++) {
2643 val = ((cbp >> (5 - k)) & 1);
2644
2645 if (k < 4) {
2646 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2647 val = val ^ pred;
2648 *coded_val = val;
2649 }
2650 cbp |= val << (5 - k);
2651
2652 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);
2653
2654 if (k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2655 continue;
2656 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);
2657 if (v->pq >= 9 && v->overlap) {
2658 if (v->rangeredfrm)
2659 for (j = 0; j < 64; j++)
2660 s->block[k][j] <<= 1;
2661 s->idsp.put_signed_pixels_clamped(s->block[k], dst[k],
2662 k & 4 ? s->uvlinesize
2663 : s->linesize);
2664 } else {
2665 if (v->rangeredfrm)
2666 for (j = 0; j < 64; j++)
2667 s->block[k][j] = (s->block[k][j] - 64) << 1;
2668 s->idsp.put_pixels_clamped(s->block[k], dst[k],
2669 k & 4 ? s->uvlinesize
2670 : s->linesize);
2671 }
2672 }
2673
2674 if (v->pq >= 9 && v->overlap) {
2675 if (s->mb_x) {
2676 v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);
2677 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
2678 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2679 v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
2680 v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
2681 }
2682 }
2683 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
2684 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
2685 if (!s->first_slice_line) {
2686 v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);
2687 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
2688 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2689 v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
2690 v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
2691 }
2692 }
2693 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
2694 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
2695 }
2696 if (v->s.loop_filter)
2697 ff_vc1_loop_filter_iblk(v, v->pq);
2698
2699 if (get_bits_count(&s->gb) > v->bits) {
2700 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2701 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2702 get_bits_count(&s->gb), v->bits);
2703 return;
2704 }
2705 }
2706 if (!v->s.loop_filter)
2707 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2708 else if (s->mb_y)
2709 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2710
2711 s->first_slice_line = 0;
2712 }
2713 if (v->s.loop_filter)
2714 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2715
2716 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2717 * profile, these only differ are when decoding MSS2 rectangles. */
2718 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2719 }
2720
2721 /** Decode blocks of I-frame for advanced profile
2722 */
2723 static void vc1_decode_i_blocks_adv(VC1Context *v)
2724 {
2725 int k;
2726 MpegEncContext *s = &v->s;
2727 int cbp, val;
2728 uint8_t *coded_val;
2729 int mb_pos;
2730 int mquant = v->pq;
2731 int mqdiff;
2732 GetBitContext *gb = &s->gb;
2733
2734 /* select coding mode used for VLC tables selection */
2735 switch (v->y_ac_table_index) {
2736 case 0:
2737 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2738 break;
2739 case 1:
2740 v->codingset = CS_HIGH_MOT_INTRA;
2741 break;
2742 case 2:
2743 v->codingset = CS_MID_RATE_INTRA;
2744 break;
2745 }
2746
2747 switch (v->c_ac_table_index) {
2748 case 0:
2749 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2750 break;
2751 case 1:
2752 v->codingset2 = CS_HIGH_MOT_INTER;
2753 break;
2754 case 2:
2755 v->codingset2 = CS_MID_RATE_INTER;
2756 break;
2757 }
2758
2759 // do frame decode
2760 s->mb_x = s->mb_y = 0;
2761 s->mb_intra = 1;
2762 s->first_slice_line = 1;
2763 s->mb_y = s->start_mb_y;
2764 if (s->start_mb_y) {
2765 s->mb_x = 0;
2766 init_block_index(v);
2767 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2768 (1 + s->b8_stride) * sizeof(*s->coded_block));
2769 }
2770 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2771 s->mb_x = 0;
2772 init_block_index(v);
2773 for (;s->mb_x < s->mb_width; s->mb_x++) {
2774 int16_t (*block)[64] = v->block[v->cur_blk_idx];
2775 ff_update_block_index(s);
2776 s->bdsp.clear_blocks(block[0]);
2777 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2778 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2779 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
2780 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
2781
2782 // do actual MB decoding and displaying
2783 if (v->fieldtx_is_raw)
2784 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2785 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2786 if (v->acpred_is_raw)
2787 v->s.ac_pred = get_bits1(&v->s.gb);
2788 else
2789 v->s.ac_pred = v->acpred_plane[mb_pos];
2790
2791 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2792 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2793
2794 GET_MQUANT();
2795
2796 s->current_picture.qscale_table[mb_pos] = mquant;
2797 /* Set DC scale - y and c use the same */
2798 s->y_dc_scale = s->y_dc_scale_table[mquant];
2799 s->c_dc_scale = s->c_dc_scale_table[mquant];
2800
2801 for (k = 0; k < 6; k++) {
2802 val = ((cbp >> (5 - k)) & 1);
2803
2804 if (k < 4) {
2805 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2806 val = val ^ pred;
2807 *coded_val = val;
2808 }
2809 cbp |= val << (5 - k);
2810
2811 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2812 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2813
2814 vc1_decode_i_block_adv(v, block[k], k, val,
2815 (k < 4) ? v->codingset : v->codingset2, mquant);
2816
2817 if (k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2818 continue;
2819 v->vc1dsp.vc1_inv_trans_8x8(block[k]);
2820 }
2821
2822 ff_vc1_smooth_overlap_filter_iblk(v);
2823 vc1_put_signed_blocks_clamped(v);
2824 if (v->s.loop_filter)
2825 ff_vc1_loop_filter_iblk_delayed(v, v->pq);
2826
2827 if (get_bits_count(&s->gb) > v->bits) {
2828 // TODO: may need modification to handle slice coding
2829 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2830 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2831 get_bits_count(&s->gb), v->bits);
2832 return;
2833 }
2834 }
2835 if (!v->s.loop_filter)
2836 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2837 else if (s->mb_y)
2838 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2839 s->first_slice_line = 0;
2840 }
2841
2842 /* raw bottom MB row */
2843 s->mb_x = 0;
2844 init_block_index(v);
2845
2846 for (;s->mb_x < s->mb_width; s->mb_x++) {
2847 ff_update_block_index(s);
2848 vc1_put_signed_blocks_clamped(v);
2849 if (v->s.loop_filter)
2850 ff_vc1_loop_filter_iblk_delayed(v, v->pq);
2851 }
2852 if (v->s.loop_filter)
2853 ff_mpeg_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);
2854 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2855 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2856 }
2857
2858 static void vc1_decode_p_blocks(VC1Context *v)
2859 {
2860 MpegEncContext *s = &v->s;
2861 int apply_loop_filter;
2862
2863 /* select coding mode used for VLC tables selection */
2864 switch (v->c_ac_table_index) {
2865 case 0:
2866 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2867 break;
2868 case 1:
2869 v->codingset = CS_HIGH_MOT_INTRA;
2870 break;
2871 case 2:
2872 v->codingset = CS_MID_RATE_INTRA;
2873 break;
2874 }
2875
2876 switch (v->c_ac_table_index) {
2877 case 0:
2878 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2879 break;
2880 case 1:
2881 v->codingset2 = CS_HIGH_MOT_INTER;
2882 break;
2883 case 2:
2884 v->codingset2 = CS_MID_RATE_INTER;
2885 break;
2886 }
2887
2888 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&
2889 v->fcm == PROGRESSIVE;
2890 s->first_slice_line = 1;
2891 memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);
2892 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2893 s->mb_x = 0;
2894 init_block_index(v);
2895 for (; s->mb_x < s->mb_width; s->mb_x++) {
2896 ff_update_block_index(s);
2897
2898 if (v->fcm == ILACE_FIELD)
2899 vc1_decode_p_mb_intfi(v);
2900 else if (v->fcm == ILACE_FRAME)
2901 vc1_decode_p_mb_intfr(v);
2902 else vc1_decode_p_mb(v);
2903 if (s->mb_y != s->start_mb_y && apply_loop_filter)
2904 ff_vc1_apply_p_loop_filter(v);
2905 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2906 // TODO: may need modification to handle slice coding
2907 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2908 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2909 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2910 return;
2911 }
2912 }
2913 memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0]) * s->mb_stride);
2914 memmove(v->ttblk_base, v->ttblk, sizeof(v->ttblk_base[0]) * s->mb_stride);
2915 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
2916 memmove(v->luma_mv_base, v->luma_mv, sizeof(v->luma_mv_base[0]) * s->mb_stride);
2917 if (s->mb_y != s->start_mb_y) ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2918 s->first_slice_line = 0;
2919 }
2920 if (apply_loop_filter) {
2921 s->mb_x = 0;
2922 init_block_index(v);
2923 for (; s->mb_x < s->mb_width; s->mb_x++) {
2924 ff_update_block_index(s);
2925 ff_vc1_apply_p_loop_filter(v);
2926 }
2927 }
2928 if (s->end_mb_y >= s->start_mb_y)
2929 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2930 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2931 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2932 }
2933
2934 static void vc1_decode_b_blocks(VC1Context *v)
2935 {
2936 MpegEncContext *s = &v->s;
2937
2938 /* select coding mode used for VLC tables selection */
2939 switch (v->c_ac_table_index) {
2940 case 0:
2941 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2942 break;
2943 case 1:
2944 v->codingset = CS_HIGH_MOT_INTRA;
2945 break;
2946 case 2:
2947 v->codingset = CS_MID_RATE_INTRA;
2948 break;
2949 }
2950
2951 switch (v->c_ac_table_index) {
2952 case 0:
2953 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2954 break;
2955 case 1:
2956 v->codingset2 = CS_HIGH_MOT_INTER;
2957 break;
2958 case 2:
2959 v->codingset2 = CS_MID_RATE_INTER;
2960 break;
2961 }
2962
2963 s->first_slice_line = 1;
2964 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2965 s->mb_x = 0;
2966 init_block_index(v);
2967 for (; s->mb_x < s->mb_width; s->mb_x++) {
2968 ff_update_block_index(s);
2969
2970 if (v->fcm == ILACE_FIELD)
2971 vc1_decode_b_mb_intfi(v);
2972 else if (v->fcm == ILACE_FRAME)
2973 vc1_decode_b_mb_intfr(v);
2974 else
2975 vc1_decode_b_mb(v);
2976 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2977 // TODO: may need modification to handle slice coding
2978 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2979 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2980 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2981 return;
2982 }
2983 if (v->s.loop_filter)
2984 ff_vc1_loop_filter_iblk(v, v->pq);
2985 }
2986 if (!v->s.loop_filter)
2987 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2988 else if (s->mb_y)
2989 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2990 s->first_slice_line = 0;
2991 }
2992 if (v->s.loop_filter)
2993 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2994 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2995 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2996 }
2997
2998 static void vc1_decode_skip_blocks(VC1Context *v)
2999 {
3000 MpegEncContext *s = &v->s;
3001
3002 if (!v->s.last_picture.f->data[0])
3003 return;
3004
3005 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
3006 s->first_slice_line = 1;
3007 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
3008 s->mb_x = 0;
3009 init_block_index(v);
3010 ff_update_block_index(s);
3011 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
3012 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3013 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3014 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
3015 s->first_slice_line = 0;
3016 }
3017 s->pict_type = AV_PICTURE_TYPE_P;
3018 }
3019
3020 void ff_vc1_decode_blocks(VC1Context *v)
3021 {
3022
3023 v->s.esc3_level_length = 0;
3024 if (v->x8_type) {
3025 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
3026 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
3027 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
3028 v->s.loop_filter, v->s.low_delay);
3029
3030 ff_er_add_slice(&v->s.er, 0, 0,
3031 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
3032 ER_MB_END);
3033 } else {
3034 v->cur_blk_idx = 0;
3035 v->left_blk_idx = -1;
3036 v->topleft_blk_idx = 1;
3037 v->top_blk_idx = 2;
3038 switch (v->s.pict_type) {
3039 case AV_PICTURE_TYPE_I:
3040 if (v->profile == PROFILE_ADVANCED)
3041 vc1_decode_i_blocks_adv(v);
3042 else
3043 vc1_decode_i_blocks(v);
3044 break;
3045 case AV_PICTURE_TYPE_P:
3046 if (v->p_frame_skipped)
3047 vc1_decode_skip_blocks(v);
3048 else
3049 vc1_decode_p_blocks(v);
3050 break;
3051 case AV_PICTURE_TYPE_B:
3052 if (v->bi_type) {
3053 if (v->profile == PROFILE_ADVANCED)
3054 vc1_decode_i_blocks_adv(v);
3055 else
3056 vc1_decode_i_blocks(v);
3057 } else
3058 vc1_decode_b_blocks(v);
3059 break;
3060 }
3061 }
3062 }
Modern FFMPEG