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 FFmpeg.
8 *
9 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 "mpegvideodec.h"
33 #include "msmpeg4data.h"
34 #include "unary.h"
35 #include "vc1.h"
36 #include "vc1_pred.h"
37 #include "vc1acdata.h"
38 #include "vc1data.h"
39
40 #define MB_INTRA_VLC_BITS 9
41 #define DC_VLC_BITS 9
42
43 // offset tables for interlaced picture MVDATA decoding
44 static const uint8_t offset_table[2][9] = {
45 { 0, 1, 2, 4, 8, 16, 32, 64, 128 },
46 { 0, 1, 3, 7, 15, 31, 63, 127, 255 },
47 };
48
49 // mapping table for internal block representation
50 static const int block_map[6] = {0, 2, 1, 3, 4, 5};
51
52 /***********************************************************************/
53 /**
54 * @name VC-1 Bitplane decoding
55 * @see 8.7, p56
56 * @{
57 */
58
59
init_block_index(VC1Context * v)60 static inline void init_block_index(VC1Context *v)
61 {
62 MpegEncContext *s = &v->s;
63 ff_init_block_index(s);
64 if (v->field_mode && !(v->second_field ^ v->tff)) {
65 s->dest[0] += s->current_picture_ptr->f->linesize[0];
66 s->dest[1] += s->current_picture_ptr->f->linesize[1];
67 s->dest[2] += s->current_picture_ptr->f->linesize[2];
68 }
69 }
70
71 /** @} */ //Bitplane group
72
vc1_put_blocks_clamped(VC1Context * v,int put_signed)73 static void vc1_put_blocks_clamped(VC1Context *v, int put_signed)
74 {
75 MpegEncContext *s = &v->s;
76 uint8_t *dest;
77 int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
78 int fieldtx = 0;
79 int i;
80
81 /* The put pixels loop is one MB row and one MB column behind the decoding
82 * loop because we can only put pixels when overlap filtering is done. For
83 * interlaced frame pictures, however, the put pixels loop is only one
84 * column behind the decoding loop as interlaced frame pictures only need
85 * horizontal overlap filtering. */
86 if (!s->first_slice_line && v->fcm != ILACE_FRAME) {
87 if (s->mb_x) {
88 for (i = 0; i < block_count; i++) {
89 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i] - 1] :
90 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i] - 2]) {
91 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + ((i & 1) - 2) * 8;
92 if (put_signed)
93 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
94 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
95 i > 3 ? s->uvlinesize : s->linesize);
96 else
97 s->idsp.put_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
98 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
99 i > 3 ? s->uvlinesize : s->linesize);
100 }
101 }
102 }
103 if (s->mb_x == v->end_mb_x - 1) {
104 for (i = 0; i < block_count; i++) {
105 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i]] :
106 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i]]) {
107 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + (i & 1) * 8;
108 if (put_signed)
109 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
110 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
111 i > 3 ? s->uvlinesize : s->linesize);
112 else
113 s->idsp.put_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
114 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
115 i > 3 ? s->uvlinesize : s->linesize);
116 }
117 }
118 }
119 }
120 if (s->mb_y == s->end_mb_y - 1 || v->fcm == ILACE_FRAME) {
121 if (s->mb_x) {
122 if (v->fcm == ILACE_FRAME)
123 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x - 1];
124 for (i = 0; i < block_count; i++) {
125 if (i > 3 ? v->mb_type[0][s->block_index[i] - 1] :
126 v->mb_type[0][s->block_index[i] - 2]) {
127 if (fieldtx)
128 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + ((i & 1) - 2) * 8;
129 else
130 dest = s->dest[0] + (i & 2) * 4 * s->linesize + ((i & 1) - 2) * 8;
131 if (put_signed)
132 s->idsp.put_signed_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
133 i > 3 ? s->dest[i - 3] - 8 : dest,
134 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
135 else
136 s->idsp.put_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
137 i > 3 ? s->dest[i - 3] - 8 : dest,
138 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
139 }
140 }
141 }
142 if (s->mb_x == v->end_mb_x - 1) {
143 if (v->fcm == ILACE_FRAME)
144 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x];
145 for (i = 0; i < block_count; i++) {
146 if (v->mb_type[0][s->block_index[i]]) {
147 if (fieldtx)
148 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + (i & 1) * 8;
149 else
150 dest = s->dest[0] + (i & 2) * 4 * s->linesize + (i & 1) * 8;
151 if (put_signed)
152 s->idsp.put_signed_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
153 i > 3 ? s->dest[i - 3] : dest,
154 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
155 else
156 s->idsp.put_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
157 i > 3 ? s->dest[i - 3] : dest,
158 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
159 }
160 }
161 }
162 }
163 }
164
165 #define inc_blk_idx(idx) do { \
166 idx++; \
167 if (idx >= v->n_allocated_blks) \
168 idx = 0; \
169 } while (0)
170
171 /***********************************************************************/
172 /**
173 * @name VC-1 Block-level functions
174 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
175 * @{
176 */
177
178 /**
179 * @def GET_MQUANT
180 * @brief Get macroblock-level quantizer scale
181 */
182 #define GET_MQUANT() \
183 if (v->dquantfrm) { \
184 int edges = 0; \
185 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
186 if (v->dqbilevel) { \
187 mquant = (get_bits1(gb)) ? -v->altpq : v->pq; \
188 } else { \
189 mqdiff = get_bits(gb, 3); \
190 if (mqdiff != 7) \
191 mquant = -v->pq - mqdiff; \
192 else \
193 mquant = -get_bits(gb, 5); \
194 } \
195 } \
196 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
197 edges = 1 << v->dqsbedge; \
198 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
199 edges = (3 << v->dqsbedge) % 15; \
200 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
201 edges = 15; \
202 if ((edges&1) && !s->mb_x) \
203 mquant = -v->altpq; \
204 if ((edges&2) && !s->mb_y) \
205 mquant = -v->altpq; \
206 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
207 mquant = -v->altpq; \
208 if ((edges&8) && \
209 s->mb_y == ((s->mb_height >> v->field_mode) - 1)) \
210 mquant = -v->altpq; \
211 if (!mquant || mquant > 31 || mquant < -31) { \
212 av_log(v->s.avctx, AV_LOG_ERROR, \
213 "Overriding invalid mquant %d\n", mquant); \
214 mquant = 1; \
215 } \
216 }
217
218 /**
219 * @def GET_MVDATA(_dmv_x, _dmv_y)
220 * @brief Get MV differentials
221 * @see MVDATA decoding from 8.3.5.2, p(1)20
222 * @param _dmv_x Horizontal differential for decoded MV
223 * @param _dmv_y Vertical differential for decoded MV
224 */
225 #define GET_MVDATA(_dmv_x, _dmv_y) \
226 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
227 VC1_MV_DIFF_VLC_BITS, 2); \
228 if (index > 36) { \
229 mb_has_coeffs = 1; \
230 index -= 37; \
231 } else \
232 mb_has_coeffs = 0; \
233 s->mb_intra = 0; \
234 if (!index) { \
235 _dmv_x = _dmv_y = 0; \
236 } else if (index == 35) { \
237 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
238 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
239 } else if (index == 36) { \
240 _dmv_x = 0; \
241 _dmv_y = 0; \
242 s->mb_intra = 1; \
243 } else { \
244 index1 = index % 6; \
245 _dmv_x = offset_table[1][index1]; \
246 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
247 if (val > 0) { \
248 val = get_bits(gb, val); \
249 sign = 0 - (val & 1); \
250 _dmv_x = (sign ^ ((val >> 1) + _dmv_x)) - sign; \
251 } \
252 \
253 index1 = index / 6; \
254 _dmv_y = offset_table[1][index1]; \
255 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
256 if (val > 0) { \
257 val = get_bits(gb, val); \
258 sign = 0 - (val & 1); \
259 _dmv_y = (sign ^ ((val >> 1) + _dmv_y)) - sign; \
260 } \
261 }
262
get_mvdata_interlaced(VC1Context * v,int * dmv_x,int * dmv_y,int * pred_flag)263 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
264 int *dmv_y, int *pred_flag)
265 {
266 int index, index1;
267 int extend_x, extend_y;
268 GetBitContext *gb = &v->s.gb;
269 int bits, esc;
270 int val, sign;
271
272 if (v->numref) {
273 bits = VC1_2REF_MVDATA_VLC_BITS;
274 esc = 125;
275 } else {
276 bits = VC1_1REF_MVDATA_VLC_BITS;
277 esc = 71;
278 }
279 extend_x = v->dmvrange & 1;
280 extend_y = (v->dmvrange >> 1) & 1;
281 index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
282 if (index == esc) {
283 *dmv_x = get_bits(gb, v->k_x);
284 *dmv_y = get_bits(gb, v->k_y);
285 if (v->numref) {
286 if (pred_flag)
287 *pred_flag = *dmv_y & 1;
288 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
289 }
290 }
291 else {
292 av_assert0(index < esc);
293 index1 = (index + 1) % 9;
294 if (index1 != 0) {
295 val = get_bits(gb, index1 + extend_x);
296 sign = 0 - (val & 1);
297 *dmv_x = (sign ^ ((val >> 1) + offset_table[extend_x][index1])) - sign;
298 } else
299 *dmv_x = 0;
300 index1 = (index + 1) / 9;
301 if (index1 > v->numref) {
302 val = get_bits(gb, (index1 >> v->numref) + extend_y);
303 sign = 0 - (val & 1);
304 *dmv_y = (sign ^ ((val >> 1) + offset_table[extend_y][index1 >> v->numref])) - sign;
305 } else
306 *dmv_y = 0;
307 if (v->numref && pred_flag)
308 *pred_flag = index1 & 1;
309 }
310 }
311
312 /** Reconstruct motion vector for B-frame and do motion compensation
313 */
vc1_b_mc(VC1Context * v,int dmv_x[2],int dmv_y[2],int direct,int mode)314 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
315 int direct, int mode)
316 {
317 if (direct) {
318 ff_vc1_mc_1mv(v, 0);
319 ff_vc1_interp_mc(v);
320 return;
321 }
322 if (mode == BMV_TYPE_INTERPOLATED) {
323 ff_vc1_mc_1mv(v, 0);
324 ff_vc1_interp_mc(v);
325 return;
326 }
327
328 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
329 }
330
331 /** Get predicted DC value for I-frames only
332 * prediction dir: left=0, top=1
333 * @param s MpegEncContext
334 * @param overlap flag indicating that overlap filtering is used
335 * @param pq integer part of picture quantizer
336 * @param[in] n block index in the current MB
337 * @param dc_val_ptr Pointer to DC predictor
338 * @param dir_ptr Prediction direction for use in AC prediction
339 */
vc1_i_pred_dc(MpegEncContext * s,int overlap,int pq,int n,int16_t ** dc_val_ptr,int * dir_ptr)340 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
341 int16_t **dc_val_ptr, int *dir_ptr)
342 {
343 int a, b, c, wrap, pred, scale;
344 int16_t *dc_val;
345 static const uint16_t dcpred[32] = {
346 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
347 114, 102, 93, 85, 79, 73, 68, 64,
348 60, 57, 54, 51, 49, 47, 45, 43,
349 41, 39, 38, 37, 35, 34, 33
350 };
351
352 /* find prediction - wmv3_dc_scale always used here in fact */
353 if (n < 4) scale = s->y_dc_scale;
354 else scale = s->c_dc_scale;
355
356 wrap = s->block_wrap[n];
357 dc_val = s->dc_val[0] + s->block_index[n];
358
359 /* B A
360 * C X
361 */
362 c = dc_val[ - 1];
363 b = dc_val[ - 1 - wrap];
364 a = dc_val[ - wrap];
365
366 if (pq < 9 || !overlap) {
367 /* Set outer values */
368 if (s->first_slice_line && (n != 2 && n != 3))
369 b = a = dcpred[scale];
370 if (s->mb_x == 0 && (n != 1 && n != 3))
371 b = c = dcpred[scale];
372 } else {
373 /* Set outer values */
374 if (s->first_slice_line && (n != 2 && n != 3))
375 b = a = 0;
376 if (s->mb_x == 0 && (n != 1 && n != 3))
377 b = c = 0;
378 }
379
380 if (abs(a - b) <= abs(b - c)) {
381 pred = c;
382 *dir_ptr = 1; // left
383 } else {
384 pred = a;
385 *dir_ptr = 0; // top
386 }
387
388 /* update predictor */
389 *dc_val_ptr = &dc_val[0];
390 return pred;
391 }
392
393
394 /** Get predicted DC value
395 * prediction dir: left=0, top=1
396 * @param s MpegEncContext
397 * @param overlap flag indicating that overlap filtering is used
398 * @param pq integer part of picture quantizer
399 * @param[in] n block index in the current MB
400 * @param a_avail flag indicating top block availability
401 * @param c_avail flag indicating left block availability
402 * @param dc_val_ptr Pointer to DC predictor
403 * @param dir_ptr Prediction direction for use in AC prediction
404 */
ff_vc1_pred_dc(MpegEncContext * s,int overlap,int pq,int n,int a_avail,int c_avail,int16_t ** dc_val_ptr,int * dir_ptr)405 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
406 int a_avail, int c_avail,
407 int16_t **dc_val_ptr, int *dir_ptr)
408 {
409 int a, b, c, wrap, pred;
410 int16_t *dc_val;
411 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
412 int q1, q2 = 0;
413 int dqscale_index;
414
415 /* scale predictors if needed */
416 q1 = FFABS(s->current_picture.qscale_table[mb_pos]);
417 dqscale_index = s->y_dc_scale_table[q1] - 1;
418 if (dqscale_index < 0)
419 return 0;
420
421 wrap = s->block_wrap[n];
422 dc_val = s->dc_val[0] + s->block_index[n];
423
424 /* B A
425 * C X
426 */
427 c = dc_val[ - 1];
428 b = dc_val[ - 1 - wrap];
429 a = dc_val[ - wrap];
430
431 if (c_avail && (n != 1 && n != 3)) {
432 q2 = FFABS(s->current_picture.qscale_table[mb_pos - 1]);
433 if (q2 && q2 != q1)
434 c = (int)((unsigned)c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
435 }
436 if (a_avail && (n != 2 && n != 3)) {
437 q2 = FFABS(s->current_picture.qscale_table[mb_pos - s->mb_stride]);
438 if (q2 && q2 != q1)
439 a = (int)((unsigned)a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
440 }
441 if (a_avail && c_avail && (n != 3)) {
442 int off = mb_pos;
443 if (n != 1)
444 off--;
445 if (n != 2)
446 off -= s->mb_stride;
447 q2 = FFABS(s->current_picture.qscale_table[off]);
448 if (q2 && q2 != q1)
449 b = (int)((unsigned)b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
450 }
451
452 if (c_avail && (!a_avail || abs(a - b) <= abs(b - c))) {
453 pred = c;
454 *dir_ptr = 1; // left
455 } else if (a_avail) {
456 pred = a;
457 *dir_ptr = 0; // top
458 } else {
459 pred = 0;
460 *dir_ptr = 1; // left
461 }
462
463 /* update predictor */
464 *dc_val_ptr = &dc_val[0];
465 return pred;
466 }
467
468 /** @} */ // Block group
469
470 /**
471 * @name VC1 Macroblock-level functions in Simple/Main Profiles
472 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
473 * @{
474 */
475
vc1_coded_block_pred(MpegEncContext * s,int n,uint8_t ** coded_block_ptr)476 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
477 uint8_t **coded_block_ptr)
478 {
479 int xy, wrap, pred, a, b, c;
480
481 xy = s->block_index[n];
482 wrap = s->b8_stride;
483
484 /* B C
485 * A X
486 */
487 a = s->coded_block[xy - 1 ];
488 b = s->coded_block[xy - 1 - wrap];
489 c = s->coded_block[xy - wrap];
490
491 if (b == c) {
492 pred = a;
493 } else {
494 pred = c;
495 }
496
497 /* store value */
498 *coded_block_ptr = &s->coded_block[xy];
499
500 return pred;
501 }
502
503 /**
504 * Decode one AC coefficient
505 * @param v The VC1 context
506 * @param last Last coefficient
507 * @param skip How much zero coefficients to skip
508 * @param value Decoded AC coefficient value
509 * @param codingset set of VLC to decode data
510 * @see 8.1.3.4
511 */
vc1_decode_ac_coeff(VC1Context * v,int * last,int * skip,int * value,int codingset)512 static int vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
513 int *value, int codingset)
514 {
515 GetBitContext *gb = &v->s.gb;
516 int index, run, level, lst, sign;
517
518 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
519 if (index < 0)
520 return index;
521 if (index != ff_vc1_ac_sizes[codingset] - 1) {
522 run = vc1_index_decode_table[codingset][index][0];
523 level = vc1_index_decode_table[codingset][index][1];
524 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
525 sign = get_bits1(gb);
526 } else {
527 int escape = decode210(gb);
528 if (escape != 2) {
529 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
530 if (index >= ff_vc1_ac_sizes[codingset] - 1U)
531 return AVERROR_INVALIDDATA;
532 run = vc1_index_decode_table[codingset][index][0];
533 level = vc1_index_decode_table[codingset][index][1];
534 lst = index >= vc1_last_decode_table[codingset];
535 if (escape == 0) {
536 if (lst)
537 level += vc1_last_delta_level_table[codingset][run];
538 else
539 level += vc1_delta_level_table[codingset][run];
540 } else {
541 if (lst)
542 run += vc1_last_delta_run_table[codingset][level] + 1;
543 else
544 run += vc1_delta_run_table[codingset][level] + 1;
545 }
546 sign = get_bits1(gb);
547 } else {
548 lst = get_bits1(gb);
549 if (v->s.esc3_level_length == 0) {
550 if (v->pq < 8 || v->dquantfrm) { // table 59
551 v->s.esc3_level_length = get_bits(gb, 3);
552 if (!v->s.esc3_level_length)
553 v->s.esc3_level_length = get_bits(gb, 2) + 8;
554 } else { // table 60
555 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
556 }
557 v->s.esc3_run_length = 3 + get_bits(gb, 2);
558 }
559 run = get_bits(gb, v->s.esc3_run_length);
560 sign = get_bits1(gb);
561 level = get_bits(gb, v->s.esc3_level_length);
562 }
563 }
564
565 *last = lst;
566 *skip = run;
567 *value = (level ^ -sign) + sign;
568
569 return 0;
570 }
571
572 /** Decode intra block in intra frames - should be faster than decode_intra_block
573 * @param v VC1Context
574 * @param block block to decode
575 * @param[in] n subblock index
576 * @param coded are AC coeffs present or not
577 * @param codingset set of VLC to decode data
578 */
vc1_decode_i_block(VC1Context * v,int16_t block[64],int n,int coded,int codingset)579 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
580 int coded, int codingset)
581 {
582 GetBitContext *gb = &v->s.gb;
583 MpegEncContext *s = &v->s;
584 int dc_pred_dir = 0; /* Direction of the DC prediction used */
585 int i;
586 int16_t *dc_val;
587 int16_t *ac_val, *ac_val2;
588 int dcdiff, scale;
589
590 /* Get DC differential */
591 if (n < 4) {
592 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
593 } else {
594 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
595 }
596 if (dcdiff) {
597 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
598 if (dcdiff == 119 /* ESC index value */) {
599 dcdiff = get_bits(gb, 8 + m);
600 } else {
601 if (m)
602 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
603 }
604 if (get_bits1(gb))
605 dcdiff = -dcdiff;
606 }
607
608 /* Prediction */
609 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
610 *dc_val = dcdiff;
611
612 /* Store the quantized DC coeff, used for prediction */
613 if (n < 4)
614 scale = s->y_dc_scale;
615 else
616 scale = s->c_dc_scale;
617 block[0] = dcdiff * scale;
618
619 ac_val = s->ac_val[0][s->block_index[n]];
620 ac_val2 = ac_val;
621 if (dc_pred_dir) // left
622 ac_val -= 16;
623 else // top
624 ac_val -= 16 * s->block_wrap[n];
625
626 scale = v->pq * 2 + v->halfpq;
627
628 //AC Decoding
629 i = !!coded;
630
631 if (coded) {
632 int last = 0, skip, value;
633 const uint8_t *zz_table;
634 int k;
635
636 if (v->s.ac_pred) {
637 if (!dc_pred_dir)
638 zz_table = v->zz_8x8[2];
639 else
640 zz_table = v->zz_8x8[3];
641 } else
642 zz_table = v->zz_8x8[1];
643
644 while (!last) {
645 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
646 if (ret < 0)
647 return ret;
648 i += skip;
649 if (i > 63)
650 break;
651 block[zz_table[i++]] = value;
652 }
653
654 /* apply AC prediction if needed */
655 if (s->ac_pred) {
656 int sh;
657 if (dc_pred_dir) { // left
658 sh = v->left_blk_sh;
659 } else { // top
660 sh = v->top_blk_sh;
661 ac_val += 8;
662 }
663 for (k = 1; k < 8; k++)
664 block[k << sh] += ac_val[k];
665 }
666 /* save AC coeffs for further prediction */
667 for (k = 1; k < 8; k++) {
668 ac_val2[k] = block[k << v->left_blk_sh];
669 ac_val2[k + 8] = block[k << v->top_blk_sh];
670 }
671
672 /* scale AC coeffs */
673 for (k = 1; k < 64; k++)
674 if (block[k]) {
675 block[k] *= scale;
676 if (!v->pquantizer)
677 block[k] += (block[k] < 0) ? -v->pq : v->pq;
678 }
679
680 } else {
681 int k;
682
683 memset(ac_val2, 0, 16 * 2);
684
685 /* apply AC prediction if needed */
686 if (s->ac_pred) {
687 int sh;
688 if (dc_pred_dir) { //left
689 sh = v->left_blk_sh;
690 } else { // top
691 sh = v->top_blk_sh;
692 ac_val += 8;
693 ac_val2 += 8;
694 }
695 memcpy(ac_val2, ac_val, 8 * 2);
696 for (k = 1; k < 8; k++) {
697 block[k << sh] = ac_val[k] * scale;
698 if (!v->pquantizer && block[k << sh])
699 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
700 }
701 }
702 }
703 if (s->ac_pred) i = 63;
704 s->block_last_index[n] = i;
705
706 return 0;
707 }
708
709 /** Decode intra block in intra frames - should be faster than decode_intra_block
710 * @param v VC1Context
711 * @param block block to decode
712 * @param[in] n subblock number
713 * @param coded are AC coeffs present or not
714 * @param codingset set of VLC to decode data
715 * @param mquant quantizer value for this macroblock
716 */
vc1_decode_i_block_adv(VC1Context * v,int16_t block[64],int n,int coded,int codingset,int mquant)717 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
718 int coded, int codingset, int mquant)
719 {
720 GetBitContext *gb = &v->s.gb;
721 MpegEncContext *s = &v->s;
722 int dc_pred_dir = 0; /* Direction of the DC prediction used */
723 int i;
724 int16_t *dc_val = NULL;
725 int16_t *ac_val, *ac_val2;
726 int dcdiff;
727 int a_avail = v->a_avail, c_avail = v->c_avail;
728 int use_pred = s->ac_pred;
729 int scale;
730 int q1, q2 = 0;
731 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
732 int quant = FFABS(mquant);
733
734 /* Get DC differential */
735 if (n < 4) {
736 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
737 } else {
738 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
739 }
740 if (dcdiff) {
741 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
742 if (dcdiff == 119 /* ESC index value */) {
743 dcdiff = get_bits(gb, 8 + m);
744 } else {
745 if (m)
746 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
747 }
748 if (get_bits1(gb))
749 dcdiff = -dcdiff;
750 }
751
752 /* Prediction */
753 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
754 *dc_val = dcdiff;
755
756 /* Store the quantized DC coeff, used for prediction */
757 if (n < 4)
758 scale = s->y_dc_scale;
759 else
760 scale = s->c_dc_scale;
761 block[0] = dcdiff * scale;
762
763 /* check if AC is needed at all */
764 if (!a_avail && !c_avail)
765 use_pred = 0;
766
767 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
768
769 ac_val = s->ac_val[0][s->block_index[n]];
770 ac_val2 = ac_val;
771 if (dc_pred_dir) // left
772 ac_val -= 16;
773 else // top
774 ac_val -= 16 * s->block_wrap[n];
775
776 q1 = s->current_picture.qscale_table[mb_pos];
777 if (n == 3)
778 q2 = q1;
779 else if (dc_pred_dir) {
780 if (n == 1)
781 q2 = q1;
782 else if (c_avail && mb_pos)
783 q2 = s->current_picture.qscale_table[mb_pos - 1];
784 } else {
785 if (n == 2)
786 q2 = q1;
787 else if (a_avail && mb_pos >= s->mb_stride)
788 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
789 }
790
791 //AC Decoding
792 i = 1;
793
794 if (coded) {
795 int last = 0, skip, value;
796 const uint8_t *zz_table;
797 int k;
798
799 if (v->s.ac_pred) {
800 if (!use_pred && v->fcm == ILACE_FRAME) {
801 zz_table = v->zzi_8x8;
802 } else {
803 if (!dc_pred_dir) // top
804 zz_table = v->zz_8x8[2];
805 else // left
806 zz_table = v->zz_8x8[3];
807 }
808 } else {
809 if (v->fcm != ILACE_FRAME)
810 zz_table = v->zz_8x8[1];
811 else
812 zz_table = v->zzi_8x8;
813 }
814
815 while (!last) {
816 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
817 if (ret < 0)
818 return ret;
819 i += skip;
820 if (i > 63)
821 break;
822 block[zz_table[i++]] = value;
823 }
824
825 /* apply AC prediction if needed */
826 if (use_pred) {
827 int sh;
828 if (dc_pred_dir) { // left
829 sh = v->left_blk_sh;
830 } else { // top
831 sh = v->top_blk_sh;
832 ac_val += 8;
833 }
834 /* scale predictors if needed*/
835 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
836 if (q1 < 1)
837 return AVERROR_INVALIDDATA;
838 if (q2)
839 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
840 if (q2 && q1 != q2) {
841 for (k = 1; k < 8; k++)
842 block[k << sh] += (int)(ac_val[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
843 } else {
844 for (k = 1; k < 8; k++)
845 block[k << sh] += ac_val[k];
846 }
847 }
848 /* save AC coeffs for further prediction */
849 for (k = 1; k < 8; k++) {
850 ac_val2[k ] = block[k << v->left_blk_sh];
851 ac_val2[k + 8] = block[k << v->top_blk_sh];
852 }
853
854 /* scale AC coeffs */
855 for (k = 1; k < 64; k++)
856 if (block[k]) {
857 block[k] *= scale;
858 if (!v->pquantizer)
859 block[k] += (block[k] < 0) ? -quant : quant;
860 }
861
862 } else { // no AC coeffs
863 int k;
864
865 memset(ac_val2, 0, 16 * 2);
866
867 /* apply AC prediction if needed */
868 if (use_pred) {
869 int sh;
870 if (dc_pred_dir) { // left
871 sh = v->left_blk_sh;
872 } else { // top
873 sh = v->top_blk_sh;
874 ac_val += 8;
875 ac_val2 += 8;
876 }
877 memcpy(ac_val2, ac_val, 8 * 2);
878 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
879 if (q1 < 1)
880 return AVERROR_INVALIDDATA;
881 if (q2)
882 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
883 if (q2 && q1 != q2) {
884 for (k = 1; k < 8; k++)
885 ac_val2[k] = (int)(ac_val2[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
886 }
887 for (k = 1; k < 8; k++) {
888 block[k << sh] = ac_val2[k] * scale;
889 if (!v->pquantizer && block[k << sh])
890 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
891 }
892 }
893 }
894 if (use_pred) i = 63;
895 s->block_last_index[n] = i;
896
897 return 0;
898 }
899
900 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
901 * @param v VC1Context
902 * @param block block to decode
903 * @param[in] n subblock index
904 * @param coded are AC coeffs present or not
905 * @param mquant block quantizer
906 * @param codingset set of VLC to decode data
907 */
vc1_decode_intra_block(VC1Context * v,int16_t block[64],int n,int coded,int mquant,int codingset)908 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
909 int coded, int mquant, int codingset)
910 {
911 GetBitContext *gb = &v->s.gb;
912 MpegEncContext *s = &v->s;
913 int dc_pred_dir = 0; /* Direction of the DC prediction used */
914 int i;
915 int16_t *dc_val = NULL;
916 int16_t *ac_val, *ac_val2;
917 int dcdiff;
918 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
919 int a_avail = v->a_avail, c_avail = v->c_avail;
920 int use_pred = s->ac_pred;
921 int scale;
922 int q1, q2 = 0;
923 int quant = FFABS(mquant);
924
925 s->bdsp.clear_block(block);
926
927 /* XXX: Guard against dumb values of mquant */
928 quant = av_clip_uintp2(quant, 5);
929
930 /* Set DC scale - y and c use the same */
931 s->y_dc_scale = s->y_dc_scale_table[quant];
932 s->c_dc_scale = s->c_dc_scale_table[quant];
933
934 /* Get DC differential */
935 if (n < 4) {
936 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
937 } else {
938 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
939 }
940 if (dcdiff) {
941 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
942 if (dcdiff == 119 /* ESC index value */) {
943 dcdiff = get_bits(gb, 8 + m);
944 } else {
945 if (m)
946 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
947 }
948 if (get_bits1(gb))
949 dcdiff = -dcdiff;
950 }
951
952 /* Prediction */
953 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
954 *dc_val = dcdiff;
955
956 /* Store the quantized DC coeff, used for prediction */
957
958 if (n < 4) {
959 block[0] = dcdiff * s->y_dc_scale;
960 } else {
961 block[0] = dcdiff * s->c_dc_scale;
962 }
963
964 //AC Decoding
965 i = 1;
966
967 /* check if AC is needed at all and adjust direction if needed */
968 if (!a_avail) dc_pred_dir = 1;
969 if (!c_avail) dc_pred_dir = 0;
970 if (!a_avail && !c_avail) use_pred = 0;
971 ac_val = s->ac_val[0][s->block_index[n]];
972 ac_val2 = ac_val;
973
974 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
975
976 if (dc_pred_dir) //left
977 ac_val -= 16;
978 else //top
979 ac_val -= 16 * s->block_wrap[n];
980
981 q1 = s->current_picture.qscale_table[mb_pos];
982 if (dc_pred_dir && c_avail && mb_pos)
983 q2 = s->current_picture.qscale_table[mb_pos - 1];
984 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
985 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
986 if (dc_pred_dir && n == 1)
987 q2 = q1;
988 if (!dc_pred_dir && n == 2)
989 q2 = q1;
990 if (n == 3) q2 = q1;
991
992 if (coded) {
993 int last = 0, skip, value;
994 int k;
995
996 while (!last) {
997 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
998 if (ret < 0)
999 return ret;
1000 i += skip;
1001 if (i > 63)
1002 break;
1003 if (v->fcm == PROGRESSIVE)
1004 block[v->zz_8x8[0][i++]] = value;
1005 else {
1006 if (use_pred && (v->fcm == ILACE_FRAME)) {
1007 if (!dc_pred_dir) // top
1008 block[v->zz_8x8[2][i++]] = value;
1009 else // left
1010 block[v->zz_8x8[3][i++]] = value;
1011 } else {
1012 block[v->zzi_8x8[i++]] = value;
1013 }
1014 }
1015 }
1016
1017 /* apply AC prediction if needed */
1018 if (use_pred) {
1019 /* scale predictors if needed*/
1020 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1021 if (q1 < 1)
1022 return AVERROR_INVALIDDATA;
1023 if (q2)
1024 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1025 if (q2 && q1 != q2) {
1026 if (dc_pred_dir) { // left
1027 for (k = 1; k < 8; k++)
1028 block[k << v->left_blk_sh] += (int)(ac_val[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1029 } else { //top
1030 for (k = 1; k < 8; k++)
1031 block[k << v->top_blk_sh] += (int)(ac_val[k + 8] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1032 }
1033 } else {
1034 if (dc_pred_dir) { // left
1035 for (k = 1; k < 8; k++)
1036 block[k << v->left_blk_sh] += ac_val[k];
1037 } else { // top
1038 for (k = 1; k < 8; k++)
1039 block[k << v->top_blk_sh] += ac_val[k + 8];
1040 }
1041 }
1042 }
1043 /* save AC coeffs for further prediction */
1044 for (k = 1; k < 8; k++) {
1045 ac_val2[k ] = block[k << v->left_blk_sh];
1046 ac_val2[k + 8] = block[k << v->top_blk_sh];
1047 }
1048
1049 /* scale AC coeffs */
1050 for (k = 1; k < 64; k++)
1051 if (block[k]) {
1052 block[k] *= scale;
1053 if (!v->pquantizer)
1054 block[k] += (block[k] < 0) ? -quant : quant;
1055 }
1056
1057 if (use_pred) i = 63;
1058 } else { // no AC coeffs
1059 int k;
1060
1061 memset(ac_val2, 0, 16 * 2);
1062 if (dc_pred_dir) { // left
1063 if (use_pred) {
1064 memcpy(ac_val2, ac_val, 8 * 2);
1065 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1066 if (q1 < 1)
1067 return AVERROR_INVALIDDATA;
1068 if (q2)
1069 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1070 if (q2 && q1 != q2) {
1071 for (k = 1; k < 8; k++)
1072 ac_val2[k] = (int)(ac_val2[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1073 }
1074 }
1075 } else { // top
1076 if (use_pred) {
1077 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1078 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1079 if (q1 < 1)
1080 return AVERROR_INVALIDDATA;
1081 if (q2)
1082 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1083 if (q2 && q1 != q2) {
1084 for (k = 1; k < 8; k++)
1085 ac_val2[k + 8] = (int)(ac_val2[k + 8] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1086 }
1087 }
1088 }
1089
1090 /* apply AC prediction if needed */
1091 if (use_pred) {
1092 if (dc_pred_dir) { // left
1093 for (k = 1; k < 8; k++) {
1094 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1095 if (!v->pquantizer && block[k << v->left_blk_sh])
1096 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1097 }
1098 } else { // top
1099 for (k = 1; k < 8; k++) {
1100 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1101 if (!v->pquantizer && block[k << v->top_blk_sh])
1102 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1103 }
1104 }
1105 i = 63;
1106 }
1107 }
1108 s->block_last_index[n] = i;
1109
1110 return 0;
1111 }
1112
1113 /** Decode P block
1114 */
vc1_decode_p_block(VC1Context * v,int16_t block[64],int n,int mquant,int ttmb,int first_block,uint8_t * dst,int linesize,int skip_block,int * ttmb_out)1115 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1116 int mquant, int ttmb, int first_block,
1117 uint8_t *dst, int linesize, int skip_block,
1118 int *ttmb_out)
1119 {
1120 MpegEncContext *s = &v->s;
1121 GetBitContext *gb = &s->gb;
1122 int i, j;
1123 int subblkpat = 0;
1124 int scale, off, idx, last, skip, value;
1125 int ttblk = ttmb & 7;
1126 int pat = 0;
1127 int quant = FFABS(mquant);
1128
1129 s->bdsp.clear_block(block);
1130
1131 if (ttmb == -1) {
1132 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)];
1133 }
1134 if (ttblk == TT_4X4) {
1135 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1136 }
1137 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1138 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1139 || (!v->res_rtm_flag && !first_block))) {
1140 subblkpat = decode012(gb);
1141 if (subblkpat)
1142 subblkpat ^= 3; // swap decoded pattern bits
1143 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1144 ttblk = TT_8X4;
1145 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1146 ttblk = TT_4X8;
1147 }
1148 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1149
1150 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1151 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1152 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1153 ttblk = TT_8X4;
1154 }
1155 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1156 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1157 ttblk = TT_4X8;
1158 }
1159 switch (ttblk) {
1160 case TT_8X8:
1161 pat = 0xF;
1162 i = 0;
1163 last = 0;
1164 while (!last) {
1165 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1166 if (ret < 0)
1167 return ret;
1168 i += skip;
1169 if (i > 63)
1170 break;
1171 if (!v->fcm)
1172 idx = v->zz_8x8[0][i++];
1173 else
1174 idx = v->zzi_8x8[i++];
1175 block[idx] = value * scale;
1176 if (!v->pquantizer)
1177 block[idx] += (block[idx] < 0) ? -quant : quant;
1178 }
1179 if (!skip_block) {
1180 if (i == 1)
1181 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1182 else {
1183 v->vc1dsp.vc1_inv_trans_8x8(block);
1184 s->idsp.add_pixels_clamped(block, dst, linesize);
1185 }
1186 }
1187 break;
1188 case TT_4X4:
1189 pat = ~subblkpat & 0xF;
1190 for (j = 0; j < 4; j++) {
1191 last = subblkpat & (1 << (3 - j));
1192 i = 0;
1193 off = (j & 1) * 4 + (j & 2) * 16;
1194 while (!last) {
1195 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1196 if (ret < 0)
1197 return ret;
1198 i += skip;
1199 if (i > 15)
1200 break;
1201 if (!v->fcm)
1202 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1203 else
1204 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1205 block[idx + off] = value * scale;
1206 if (!v->pquantizer)
1207 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1208 }
1209 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1210 if (i == 1)
1211 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1212 else
1213 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1214 }
1215 }
1216 break;
1217 case TT_8X4:
1218 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1219 for (j = 0; j < 2; j++) {
1220 last = subblkpat & (1 << (1 - j));
1221 i = 0;
1222 off = j * 32;
1223 while (!last) {
1224 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1225 if (ret < 0)
1226 return ret;
1227 i += skip;
1228 if (i > 31)
1229 break;
1230 if (!v->fcm)
1231 idx = v->zz_8x4[i++] + off;
1232 else
1233 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1234 block[idx] = value * scale;
1235 if (!v->pquantizer)
1236 block[idx] += (block[idx] < 0) ? -quant : quant;
1237 }
1238 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1239 if (i == 1)
1240 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1241 else
1242 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1243 }
1244 }
1245 break;
1246 case TT_4X8:
1247 pat = ~(subblkpat * 5) & 0xF;
1248 for (j = 0; j < 2; j++) {
1249 last = subblkpat & (1 << (1 - j));
1250 i = 0;
1251 off = j * 4;
1252 while (!last) {
1253 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1254 if (ret < 0)
1255 return ret;
1256 i += skip;
1257 if (i > 31)
1258 break;
1259 if (!v->fcm)
1260 idx = v->zz_4x8[i++] + off;
1261 else
1262 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1263 block[idx] = value * scale;
1264 if (!v->pquantizer)
1265 block[idx] += (block[idx] < 0) ? -quant : quant;
1266 }
1267 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1268 if (i == 1)
1269 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1270 else
1271 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1272 }
1273 }
1274 break;
1275 }
1276 if (ttmb_out)
1277 *ttmb_out |= ttblk << (n * 4);
1278 return pat;
1279 }
1280
1281 /** @} */ // Macroblock group
1282
1283 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1284
1285 /** Decode one P-frame MB
1286 */
vc1_decode_p_mb(VC1Context * v)1287 static int vc1_decode_p_mb(VC1Context *v)
1288 {
1289 MpegEncContext *s = &v->s;
1290 GetBitContext *gb = &s->gb;
1291 int i, j;
1292 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1293 int cbp; /* cbp decoding stuff */
1294 int mqdiff, mquant; /* MB quantization */
1295 int ttmb = v->ttfrm; /* MB Transform type */
1296
1297 int mb_has_coeffs = 1; /* last_flag */
1298 int dmv_x, dmv_y; /* Differential MV components */
1299 int index, index1; /* LUT indexes */
1300 int val, sign; /* temp values */
1301 int first_block = 1;
1302 int dst_idx, off;
1303 int skipped, fourmv;
1304 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1305
1306 mquant = v->pq; /* lossy initialization */
1307
1308 if (v->mv_type_is_raw)
1309 fourmv = get_bits1(gb);
1310 else
1311 fourmv = v->mv_type_mb_plane[mb_pos];
1312 if (v->skip_is_raw)
1313 skipped = get_bits1(gb);
1314 else
1315 skipped = v->s.mbskip_table[mb_pos];
1316
1317 if (!fourmv) { /* 1MV mode */
1318 if (!skipped) {
1319 GET_MVDATA(dmv_x, dmv_y);
1320
1321 if (s->mb_intra) {
1322 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1323 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1324 }
1325 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1326 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1327
1328 /* FIXME Set DC val for inter block ? */
1329 if (s->mb_intra && !mb_has_coeffs) {
1330 GET_MQUANT();
1331 s->ac_pred = get_bits1(gb);
1332 cbp = 0;
1333 } else if (mb_has_coeffs) {
1334 if (s->mb_intra)
1335 s->ac_pred = get_bits1(gb);
1336 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1337 GET_MQUANT();
1338 } else {
1339 mquant = v->pq;
1340 cbp = 0;
1341 }
1342 s->current_picture.qscale_table[mb_pos] = mquant;
1343
1344 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1345 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1346 VC1_TTMB_VLC_BITS, 2);
1347 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1348 dst_idx = 0;
1349 for (i = 0; i < 6; i++) {
1350 s->dc_val[0][s->block_index[i]] = 0;
1351 dst_idx += i >> 2;
1352 val = ((cbp >> (5 - i)) & 1);
1353 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1354 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1355 if (s->mb_intra) {
1356 /* check if prediction blocks A and C are available */
1357 v->a_avail = v->c_avail = 0;
1358 if (i == 2 || i == 3 || !s->first_slice_line)
1359 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1360 if (i == 1 || i == 3 || s->mb_x)
1361 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1362
1363 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1364 (i & 4) ? v->codingset2 : v->codingset);
1365 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1366 continue;
1367 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1368 if (v->rangeredfrm)
1369 for (j = 0; j < 64; j++)
1370 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1371 block_cbp |= 0xF << (i << 2);
1372 block_intra |= 1 << i;
1373 } else if (val) {
1374 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1375 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1376 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1377 if (pat < 0)
1378 return pat;
1379 block_cbp |= pat << (i << 2);
1380 if (!v->ttmbf && ttmb < 8)
1381 ttmb = -1;
1382 first_block = 0;
1383 }
1384 }
1385 } else { // skipped
1386 s->mb_intra = 0;
1387 for (i = 0; i < 6; i++) {
1388 v->mb_type[0][s->block_index[i]] = 0;
1389 s->dc_val[0][s->block_index[i]] = 0;
1390 }
1391 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1392 s->current_picture.qscale_table[mb_pos] = 0;
1393 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1394 ff_vc1_mc_1mv(v, 0);
1395 }
1396 } else { // 4MV mode
1397 if (!skipped /* unskipped MB */) {
1398 int intra_count = 0, coded_inter = 0;
1399 int is_intra[6], is_coded[6];
1400 /* Get CBPCY */
1401 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1402 for (i = 0; i < 6; i++) {
1403 val = ((cbp >> (5 - i)) & 1);
1404 s->dc_val[0][s->block_index[i]] = 0;
1405 s->mb_intra = 0;
1406 if (i < 4) {
1407 dmv_x = dmv_y = 0;
1408 s->mb_intra = 0;
1409 mb_has_coeffs = 0;
1410 if (val) {
1411 GET_MVDATA(dmv_x, dmv_y);
1412 }
1413 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1414 if (!s->mb_intra)
1415 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1416 intra_count += s->mb_intra;
1417 is_intra[i] = s->mb_intra;
1418 is_coded[i] = mb_has_coeffs;
1419 }
1420 if (i & 4) {
1421 is_intra[i] = (intra_count >= 3);
1422 is_coded[i] = val;
1423 }
1424 if (i == 4)
1425 ff_vc1_mc_4mv_chroma(v, 0);
1426 v->mb_type[0][s->block_index[i]] = is_intra[i];
1427 if (!coded_inter)
1428 coded_inter = !is_intra[i] & is_coded[i];
1429 }
1430 // if there are no coded blocks then don't do anything more
1431 dst_idx = 0;
1432 if (!intra_count && !coded_inter)
1433 goto end;
1434 GET_MQUANT();
1435 s->current_picture.qscale_table[mb_pos] = mquant;
1436 /* test if block is intra and has pred */
1437 {
1438 int intrapred = 0;
1439 for (i = 0; i < 6; i++)
1440 if (is_intra[i]) {
1441 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1442 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1443 intrapred = 1;
1444 break;
1445 }
1446 }
1447 if (intrapred)
1448 s->ac_pred = get_bits1(gb);
1449 else
1450 s->ac_pred = 0;
1451 }
1452 if (!v->ttmbf && coded_inter)
1453 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1454 for (i = 0; i < 6; i++) {
1455 dst_idx += i >> 2;
1456 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1457 s->mb_intra = is_intra[i];
1458 if (is_intra[i]) {
1459 /* check if prediction blocks A and C are available */
1460 v->a_avail = v->c_avail = 0;
1461 if (i == 2 || i == 3 || !s->first_slice_line)
1462 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1463 if (i == 1 || i == 3 || s->mb_x)
1464 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1465
1466 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1467 (i & 4) ? v->codingset2 : v->codingset);
1468 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1469 continue;
1470 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1471 if (v->rangeredfrm)
1472 for (j = 0; j < 64; j++)
1473 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1474 block_cbp |= 0xF << (i << 2);
1475 block_intra |= 1 << i;
1476 } else if (is_coded[i]) {
1477 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1478 first_block, s->dest[dst_idx] + off,
1479 (i & 4) ? s->uvlinesize : s->linesize,
1480 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1481 &block_tt);
1482 if (pat < 0)
1483 return pat;
1484 block_cbp |= pat << (i << 2);
1485 if (!v->ttmbf && ttmb < 8)
1486 ttmb = -1;
1487 first_block = 0;
1488 }
1489 }
1490 } else { // skipped MB
1491 s->mb_intra = 0;
1492 s->current_picture.qscale_table[mb_pos] = 0;
1493 for (i = 0; i < 6; i++) {
1494 v->mb_type[0][s->block_index[i]] = 0;
1495 s->dc_val[0][s->block_index[i]] = 0;
1496 }
1497 for (i = 0; i < 4; i++) {
1498 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1499 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1500 }
1501 ff_vc1_mc_4mv_chroma(v, 0);
1502 s->current_picture.qscale_table[mb_pos] = 0;
1503 }
1504 }
1505 end:
1506 if (v->overlap && v->pq >= 9)
1507 ff_vc1_p_overlap_filter(v);
1508 vc1_put_blocks_clamped(v, 1);
1509
1510 v->cbp[s->mb_x] = block_cbp;
1511 v->ttblk[s->mb_x] = block_tt;
1512 v->is_intra[s->mb_x] = block_intra;
1513
1514 return 0;
1515 }
1516
1517 /* Decode one macroblock in an interlaced frame p picture */
1518
vc1_decode_p_mb_intfr(VC1Context * v)1519 static int vc1_decode_p_mb_intfr(VC1Context *v)
1520 {
1521 MpegEncContext *s = &v->s;
1522 GetBitContext *gb = &s->gb;
1523 int i;
1524 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1525 int cbp = 0; /* cbp decoding stuff */
1526 int mqdiff, mquant; /* MB quantization */
1527 int ttmb = v->ttfrm; /* MB Transform type */
1528
1529 int mb_has_coeffs = 1; /* last_flag */
1530 int dmv_x, dmv_y; /* Differential MV components */
1531 int val; /* temp value */
1532 int first_block = 1;
1533 int dst_idx, off;
1534 int skipped, fourmv = 0, twomv = 0;
1535 int block_cbp = 0, pat, block_tt = 0;
1536 int idx_mbmode = 0, mvbp;
1537 int fieldtx;
1538
1539 mquant = v->pq; /* Lossy initialization */
1540
1541 if (v->skip_is_raw)
1542 skipped = get_bits1(gb);
1543 else
1544 skipped = v->s.mbskip_table[mb_pos];
1545 if (!skipped) {
1546 if (v->fourmvswitch)
1547 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1548 else
1549 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1550 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1551 /* store the motion vector type in a flag (useful later) */
1552 case MV_PMODE_INTFR_4MV:
1553 fourmv = 1;
1554 v->blk_mv_type[s->block_index[0]] = 0;
1555 v->blk_mv_type[s->block_index[1]] = 0;
1556 v->blk_mv_type[s->block_index[2]] = 0;
1557 v->blk_mv_type[s->block_index[3]] = 0;
1558 break;
1559 case MV_PMODE_INTFR_4MV_FIELD:
1560 fourmv = 1;
1561 v->blk_mv_type[s->block_index[0]] = 1;
1562 v->blk_mv_type[s->block_index[1]] = 1;
1563 v->blk_mv_type[s->block_index[2]] = 1;
1564 v->blk_mv_type[s->block_index[3]] = 1;
1565 break;
1566 case MV_PMODE_INTFR_2MV_FIELD:
1567 twomv = 1;
1568 v->blk_mv_type[s->block_index[0]] = 1;
1569 v->blk_mv_type[s->block_index[1]] = 1;
1570 v->blk_mv_type[s->block_index[2]] = 1;
1571 v->blk_mv_type[s->block_index[3]] = 1;
1572 break;
1573 case MV_PMODE_INTFR_1MV:
1574 v->blk_mv_type[s->block_index[0]] = 0;
1575 v->blk_mv_type[s->block_index[1]] = 0;
1576 v->blk_mv_type[s->block_index[2]] = 0;
1577 v->blk_mv_type[s->block_index[3]] = 0;
1578 break;
1579 }
1580 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1581 for (i = 0; i < 4; i++) {
1582 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1583 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1584 }
1585 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1586 s->mb_intra = 1;
1587 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1588 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1589 mb_has_coeffs = get_bits1(gb);
1590 if (mb_has_coeffs)
1591 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1592 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1593 GET_MQUANT();
1594 s->current_picture.qscale_table[mb_pos] = mquant;
1595 /* Set DC scale - y and c use the same (not sure if necessary here) */
1596 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1597 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1598 dst_idx = 0;
1599 for (i = 0; i < 6; i++) {
1600 v->a_avail = v->c_avail = 0;
1601 v->mb_type[0][s->block_index[i]] = 1;
1602 s->dc_val[0][s->block_index[i]] = 0;
1603 dst_idx += i >> 2;
1604 val = ((cbp >> (5 - i)) & 1);
1605 if (i == 2 || i == 3 || !s->first_slice_line)
1606 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1607 if (i == 1 || i == 3 || s->mb_x)
1608 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1609
1610 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1611 (i & 4) ? v->codingset2 : v->codingset);
1612 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1613 continue;
1614 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1615 if (i < 4)
1616 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1617 else
1618 off = 0;
1619 block_cbp |= 0xf << (i << 2);
1620 }
1621
1622 } else { // inter MB
1623 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1624 if (mb_has_coeffs)
1625 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1626 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1627 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1628 } else {
1629 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1630 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1631 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1632 }
1633 }
1634 s->mb_intra = v->is_intra[s->mb_x] = 0;
1635 for (i = 0; i < 6; i++)
1636 v->mb_type[0][s->block_index[i]] = 0;
1637 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1638 /* for all motion vector read MVDATA and motion compensate each block */
1639 dst_idx = 0;
1640 if (fourmv) {
1641 mvbp = v->fourmvbp;
1642 for (i = 0; i < 4; i++) {
1643 dmv_x = dmv_y = 0;
1644 if (mvbp & (8 >> i))
1645 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1646 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, 0);
1647 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1648 }
1649 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1650 } else if (twomv) {
1651 mvbp = v->twomvbp;
1652 dmv_x = dmv_y = 0;
1653 if (mvbp & 2) {
1654 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1655 }
1656 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1657 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1658 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1659 dmv_x = dmv_y = 0;
1660 if (mvbp & 1) {
1661 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1662 }
1663 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1664 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1665 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1666 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1667 } else {
1668 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1669 dmv_x = dmv_y = 0;
1670 if (mvbp) {
1671 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1672 }
1673 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 0);
1674 ff_vc1_mc_1mv(v, 0);
1675 }
1676 if (cbp)
1677 GET_MQUANT(); // p. 227
1678 s->current_picture.qscale_table[mb_pos] = mquant;
1679 if (!v->ttmbf && cbp)
1680 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1681 for (i = 0; i < 6; i++) {
1682 s->dc_val[0][s->block_index[i]] = 0;
1683 dst_idx += i >> 2;
1684 val = ((cbp >> (5 - i)) & 1);
1685 if (!fieldtx)
1686 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1687 else
1688 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1689 if (val) {
1690 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1691 first_block, s->dest[dst_idx] + off,
1692 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1693 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1694 if (pat < 0)
1695 return pat;
1696 block_cbp |= pat << (i << 2);
1697 if (!v->ttmbf && ttmb < 8)
1698 ttmb = -1;
1699 first_block = 0;
1700 }
1701 }
1702 }
1703 } else { // skipped
1704 s->mb_intra = v->is_intra[s->mb_x] = 0;
1705 for (i = 0; i < 6; i++) {
1706 v->mb_type[0][s->block_index[i]] = 0;
1707 s->dc_val[0][s->block_index[i]] = 0;
1708 }
1709 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1710 s->current_picture.qscale_table[mb_pos] = 0;
1711 v->blk_mv_type[s->block_index[0]] = 0;
1712 v->blk_mv_type[s->block_index[1]] = 0;
1713 v->blk_mv_type[s->block_index[2]] = 0;
1714 v->blk_mv_type[s->block_index[3]] = 0;
1715 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 0);
1716 ff_vc1_mc_1mv(v, 0);
1717 v->fieldtx_plane[mb_pos] = 0;
1718 }
1719 if (v->overlap && v->pq >= 9)
1720 ff_vc1_p_overlap_filter(v);
1721 vc1_put_blocks_clamped(v, 1);
1722
1723 v->cbp[s->mb_x] = block_cbp;
1724 v->ttblk[s->mb_x] = block_tt;
1725
1726 return 0;
1727 }
1728
vc1_decode_p_mb_intfi(VC1Context * v)1729 static int vc1_decode_p_mb_intfi(VC1Context *v)
1730 {
1731 MpegEncContext *s = &v->s;
1732 GetBitContext *gb = &s->gb;
1733 int i;
1734 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1735 int cbp = 0; /* cbp decoding stuff */
1736 int mqdiff, mquant; /* MB quantization */
1737 int ttmb = v->ttfrm; /* MB Transform type */
1738
1739 int mb_has_coeffs = 1; /* last_flag */
1740 int dmv_x, dmv_y; /* Differential MV components */
1741 int val; /* temp values */
1742 int first_block = 1;
1743 int dst_idx, off;
1744 int pred_flag = 0;
1745 int block_cbp = 0, pat, block_tt = 0;
1746 int idx_mbmode = 0;
1747
1748 mquant = v->pq; /* Lossy initialization */
1749
1750 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1751 if (idx_mbmode <= 1) { // intra MB
1752 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1753 s->mb_intra = 1;
1754 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1755 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1756 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1757 GET_MQUANT();
1758 s->current_picture.qscale_table[mb_pos] = mquant;
1759 /* Set DC scale - y and c use the same (not sure if necessary here) */
1760 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1761 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1762 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1763 mb_has_coeffs = idx_mbmode & 1;
1764 if (mb_has_coeffs)
1765 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1766 dst_idx = 0;
1767 for (i = 0; i < 6; i++) {
1768 v->a_avail = v->c_avail = 0;
1769 v->mb_type[0][s->block_index[i]] = 1;
1770 s->dc_val[0][s->block_index[i]] = 0;
1771 dst_idx += i >> 2;
1772 val = ((cbp >> (5 - i)) & 1);
1773 if (i == 2 || i == 3 || !s->first_slice_line)
1774 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1775 if (i == 1 || i == 3 || s->mb_x)
1776 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1777
1778 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1779 (i & 4) ? v->codingset2 : v->codingset);
1780 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1781 continue;
1782 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1783 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1784 block_cbp |= 0xf << (i << 2);
1785 }
1786 } else {
1787 s->mb_intra = v->is_intra[s->mb_x] = 0;
1788 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1789 for (i = 0; i < 6; i++)
1790 v->mb_type[0][s->block_index[i]] = 0;
1791 if (idx_mbmode <= 5) { // 1-MV
1792 dmv_x = dmv_y = pred_flag = 0;
1793 if (idx_mbmode & 1) {
1794 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1795 }
1796 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1797 ff_vc1_mc_1mv(v, 0);
1798 mb_has_coeffs = !(idx_mbmode & 2);
1799 } else { // 4-MV
1800 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1801 for (i = 0; i < 4; i++) {
1802 dmv_x = dmv_y = pred_flag = 0;
1803 if (v->fourmvbp & (8 >> i))
1804 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1805 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1806 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1807 }
1808 ff_vc1_mc_4mv_chroma(v, 0);
1809 mb_has_coeffs = idx_mbmode & 1;
1810 }
1811 if (mb_has_coeffs)
1812 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1813 if (cbp) {
1814 GET_MQUANT();
1815 }
1816 s->current_picture.qscale_table[mb_pos] = mquant;
1817 if (!v->ttmbf && cbp) {
1818 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1819 }
1820 dst_idx = 0;
1821 for (i = 0; i < 6; i++) {
1822 s->dc_val[0][s->block_index[i]] = 0;
1823 dst_idx += i >> 2;
1824 val = ((cbp >> (5 - i)) & 1);
1825 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1826 if (val) {
1827 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1828 first_block, s->dest[dst_idx] + off,
1829 (i & 4) ? s->uvlinesize : s->linesize,
1830 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1831 &block_tt);
1832 if (pat < 0)
1833 return pat;
1834 block_cbp |= pat << (i << 2);
1835 if (!v->ttmbf && ttmb < 8)
1836 ttmb = -1;
1837 first_block = 0;
1838 }
1839 }
1840 }
1841 if (v->overlap && v->pq >= 9)
1842 ff_vc1_p_overlap_filter(v);
1843 vc1_put_blocks_clamped(v, 1);
1844
1845 v->cbp[s->mb_x] = block_cbp;
1846 v->ttblk[s->mb_x] = block_tt;
1847
1848 return 0;
1849 }
1850
1851 /** Decode one B-frame MB (in Main profile)
1852 */
vc1_decode_b_mb(VC1Context * v)1853 static int vc1_decode_b_mb(VC1Context *v)
1854 {
1855 MpegEncContext *s = &v->s;
1856 GetBitContext *gb = &s->gb;
1857 int i, j;
1858 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1859 int cbp = 0; /* cbp decoding stuff */
1860 int mqdiff, mquant; /* MB quantization */
1861 int ttmb = v->ttfrm; /* MB Transform type */
1862 int mb_has_coeffs = 0; /* last_flag */
1863 int index, index1; /* LUT indexes */
1864 int val, sign; /* temp values */
1865 int first_block = 1;
1866 int dst_idx, off;
1867 int skipped, direct;
1868 int dmv_x[2], dmv_y[2];
1869 int bmvtype = BMV_TYPE_BACKWARD;
1870
1871 mquant = v->pq; /* lossy initialization */
1872 s->mb_intra = 0;
1873
1874 if (v->dmb_is_raw)
1875 direct = get_bits1(gb);
1876 else
1877 direct = v->direct_mb_plane[mb_pos];
1878 if (v->skip_is_raw)
1879 skipped = get_bits1(gb);
1880 else
1881 skipped = v->s.mbskip_table[mb_pos];
1882
1883 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1884 for (i = 0; i < 6; i++) {
1885 v->mb_type[0][s->block_index[i]] = 0;
1886 s->dc_val[0][s->block_index[i]] = 0;
1887 }
1888 s->current_picture.qscale_table[mb_pos] = 0;
1889
1890 if (!direct) {
1891 if (!skipped) {
1892 GET_MVDATA(dmv_x[0], dmv_y[0]);
1893 dmv_x[1] = dmv_x[0];
1894 dmv_y[1] = dmv_y[0];
1895 }
1896 if (skipped || !s->mb_intra) {
1897 bmvtype = decode012(gb);
1898 switch (bmvtype) {
1899 case 0:
1900 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1901 break;
1902 case 1:
1903 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1904 break;
1905 case 2:
1906 bmvtype = BMV_TYPE_INTERPOLATED;
1907 dmv_x[0] = dmv_y[0] = 0;
1908 }
1909 }
1910 }
1911 for (i = 0; i < 6; i++)
1912 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1913
1914 if (skipped) {
1915 if (direct)
1916 bmvtype = BMV_TYPE_INTERPOLATED;
1917 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1918 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1919 return 0;
1920 }
1921 if (direct) {
1922 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1923 GET_MQUANT();
1924 s->mb_intra = 0;
1925 s->current_picture.qscale_table[mb_pos] = mquant;
1926 if (!v->ttmbf)
1927 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1928 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1929 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1930 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1931 } else {
1932 if (!mb_has_coeffs && !s->mb_intra) {
1933 /* no coded blocks - effectively skipped */
1934 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1935 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1936 return 0;
1937 }
1938 if (s->mb_intra && !mb_has_coeffs) {
1939 GET_MQUANT();
1940 s->current_picture.qscale_table[mb_pos] = mquant;
1941 s->ac_pred = get_bits1(gb);
1942 cbp = 0;
1943 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1944 } else {
1945 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1946 GET_MVDATA(dmv_x[0], dmv_y[0]);
1947 if (!mb_has_coeffs) {
1948 /* interpolated skipped block */
1949 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1950 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1951 return 0;
1952 }
1953 }
1954 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1955 if (!s->mb_intra) {
1956 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1957 }
1958 if (s->mb_intra)
1959 s->ac_pred = get_bits1(gb);
1960 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1961 GET_MQUANT();
1962 s->current_picture.qscale_table[mb_pos] = mquant;
1963 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1964 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1965 }
1966 }
1967 dst_idx = 0;
1968 for (i = 0; i < 6; i++) {
1969 s->dc_val[0][s->block_index[i]] = 0;
1970 dst_idx += i >> 2;
1971 val = ((cbp >> (5 - i)) & 1);
1972 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1973 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1974 if (s->mb_intra) {
1975 /* check if prediction blocks A and C are available */
1976 v->a_avail = v->c_avail = 0;
1977 if (i == 2 || i == 3 || !s->first_slice_line)
1978 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1979 if (i == 1 || i == 3 || s->mb_x)
1980 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1981
1982 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1983 (i & 4) ? v->codingset2 : v->codingset);
1984 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1985 continue;
1986 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1987 if (v->rangeredfrm)
1988 for (j = 0; j < 64; j++)
1989 s->block[i][j] *= 2;
1990 s->idsp.put_signed_pixels_clamped(s->block[i],
1991 s->dest[dst_idx] + off,
1992 i & 4 ? s->uvlinesize
1993 : s->linesize);
1994 } else if (val) {
1995 int pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1996 first_block, s->dest[dst_idx] + off,
1997 (i & 4) ? s->uvlinesize : s->linesize,
1998 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
1999 if (pat < 0)
2000 return pat;
2001 if (!v->ttmbf && ttmb < 8)
2002 ttmb = -1;
2003 first_block = 0;
2004 }
2005 }
2006 return 0;
2007 }
2008
2009 /** Decode one B-frame MB (in interlaced field B picture)
2010 */
vc1_decode_b_mb_intfi(VC1Context * v)2011 static int vc1_decode_b_mb_intfi(VC1Context *v)
2012 {
2013 MpegEncContext *s = &v->s;
2014 GetBitContext *gb = &s->gb;
2015 int i, j;
2016 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2017 int cbp = 0; /* cbp decoding stuff */
2018 int mqdiff, mquant; /* MB quantization */
2019 int ttmb = v->ttfrm; /* MB Transform type */
2020 int mb_has_coeffs = 0; /* last_flag */
2021 int val; /* temp value */
2022 int first_block = 1;
2023 int dst_idx, off;
2024 int fwd;
2025 int dmv_x[2], dmv_y[2], pred_flag[2];
2026 int bmvtype = BMV_TYPE_BACKWARD;
2027 int block_cbp = 0, pat, block_tt = 0;
2028 int idx_mbmode;
2029
2030 mquant = v->pq; /* Lossy initialization */
2031 s->mb_intra = 0;
2032
2033 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2034 if (idx_mbmode <= 1) { // intra MB
2035 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2036 s->mb_intra = 1;
2037 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2038 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2039 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2040 GET_MQUANT();
2041 s->current_picture.qscale_table[mb_pos] = mquant;
2042 /* Set DC scale - y and c use the same (not sure if necessary here) */
2043 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2044 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2045 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2046 mb_has_coeffs = idx_mbmode & 1;
2047 if (mb_has_coeffs)
2048 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2049 dst_idx = 0;
2050 for (i = 0; i < 6; i++) {
2051 v->a_avail = v->c_avail = 0;
2052 v->mb_type[0][s->block_index[i]] = 1;
2053 s->dc_val[0][s->block_index[i]] = 0;
2054 dst_idx += i >> 2;
2055 val = ((cbp >> (5 - i)) & 1);
2056 if (i == 2 || i == 3 || !s->first_slice_line)
2057 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2058 if (i == 1 || i == 3 || s->mb_x)
2059 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2060
2061 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2062 (i & 4) ? v->codingset2 : v->codingset);
2063 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2064 continue;
2065 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2066 if (v->rangeredfrm)
2067 for (j = 0; j < 64; j++)
2068 s->block[i][j] <<= 1;
2069 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2070 s->idsp.put_signed_pixels_clamped(s->block[i],
2071 s->dest[dst_idx] + off,
2072 (i & 4) ? s->uvlinesize
2073 : s->linesize);
2074 }
2075 } else {
2076 s->mb_intra = v->is_intra[s->mb_x] = 0;
2077 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2078 for (i = 0; i < 6; i++)
2079 v->mb_type[0][s->block_index[i]] = 0;
2080 if (v->fmb_is_raw)
2081 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2082 else
2083 fwd = v->forward_mb_plane[mb_pos];
2084 if (idx_mbmode <= 5) { // 1-MV
2085 int interpmvp = 0;
2086 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2087 pred_flag[0] = pred_flag[1] = 0;
2088 if (fwd)
2089 bmvtype = BMV_TYPE_FORWARD;
2090 else {
2091 bmvtype = decode012(gb);
2092 switch (bmvtype) {
2093 case 0:
2094 bmvtype = BMV_TYPE_BACKWARD;
2095 break;
2096 case 1:
2097 bmvtype = BMV_TYPE_DIRECT;
2098 break;
2099 case 2:
2100 bmvtype = BMV_TYPE_INTERPOLATED;
2101 interpmvp = get_bits1(gb);
2102 }
2103 }
2104 v->bmvtype = bmvtype;
2105 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2106 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2107 }
2108 if (interpmvp) {
2109 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2110 }
2111 if (bmvtype == BMV_TYPE_DIRECT) {
2112 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2113 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2114 if (!s->next_picture_ptr->field_picture) {
2115 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2116 return AVERROR_INVALIDDATA;
2117 }
2118 }
2119 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2120 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2121 mb_has_coeffs = !(idx_mbmode & 2);
2122 } else { // 4-MV
2123 if (fwd)
2124 bmvtype = BMV_TYPE_FORWARD;
2125 v->bmvtype = bmvtype;
2126 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2127 for (i = 0; i < 4; i++) {
2128 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2129 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2130 if (v->fourmvbp & (8 >> i)) {
2131 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2132 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2133 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2134 }
2135 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2136 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2137 }
2138 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2139 mb_has_coeffs = idx_mbmode & 1;
2140 }
2141 if (mb_has_coeffs)
2142 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2143 if (cbp) {
2144 GET_MQUANT();
2145 }
2146 s->current_picture.qscale_table[mb_pos] = mquant;
2147 if (!v->ttmbf && cbp) {
2148 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2149 }
2150 dst_idx = 0;
2151 for (i = 0; i < 6; i++) {
2152 s->dc_val[0][s->block_index[i]] = 0;
2153 dst_idx += i >> 2;
2154 val = ((cbp >> (5 - i)) & 1);
2155 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2156 if (val) {
2157 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2158 first_block, s->dest[dst_idx] + off,
2159 (i & 4) ? s->uvlinesize : s->linesize,
2160 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2161 if (pat < 0)
2162 return pat;
2163 block_cbp |= pat << (i << 2);
2164 if (!v->ttmbf && ttmb < 8)
2165 ttmb = -1;
2166 first_block = 0;
2167 }
2168 }
2169 }
2170 v->cbp[s->mb_x] = block_cbp;
2171 v->ttblk[s->mb_x] = block_tt;
2172
2173 return 0;
2174 }
2175
2176 /** Decode one B-frame MB (in interlaced frame B picture)
2177 */
vc1_decode_b_mb_intfr(VC1Context * v)2178 static int vc1_decode_b_mb_intfr(VC1Context *v)
2179 {
2180 MpegEncContext *s = &v->s;
2181 GetBitContext *gb = &s->gb;
2182 int i, j;
2183 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2184 int cbp = 0; /* cbp decoding stuff */
2185 int mqdiff, mquant; /* MB quantization */
2186 int ttmb = v->ttfrm; /* MB Transform type */
2187 int mvsw = 0; /* motion vector switch */
2188 int mb_has_coeffs = 1; /* last_flag */
2189 int dmv_x, dmv_y; /* Differential MV components */
2190 int val; /* temp value */
2191 int first_block = 1;
2192 int dst_idx, off;
2193 int skipped, direct, twomv = 0;
2194 int block_cbp = 0, pat, block_tt = 0;
2195 int idx_mbmode = 0, mvbp;
2196 int stride_y, fieldtx;
2197 int bmvtype = BMV_TYPE_BACKWARD;
2198 int dir, dir2;
2199
2200 mquant = v->pq; /* Lossy initialization */
2201 s->mb_intra = 0;
2202 if (v->skip_is_raw)
2203 skipped = get_bits1(gb);
2204 else
2205 skipped = v->s.mbskip_table[mb_pos];
2206
2207 if (!skipped) {
2208 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2209 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2210 twomv = 1;
2211 v->blk_mv_type[s->block_index[0]] = 1;
2212 v->blk_mv_type[s->block_index[1]] = 1;
2213 v->blk_mv_type[s->block_index[2]] = 1;
2214 v->blk_mv_type[s->block_index[3]] = 1;
2215 } else {
2216 v->blk_mv_type[s->block_index[0]] = 0;
2217 v->blk_mv_type[s->block_index[1]] = 0;
2218 v->blk_mv_type[s->block_index[2]] = 0;
2219 v->blk_mv_type[s->block_index[3]] = 0;
2220 }
2221 }
2222
2223 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2224 for (i = 0; i < 4; i++) {
2225 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2226 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2227 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2228 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2229 }
2230 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2231 s->mb_intra = 1;
2232 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2233 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2234 mb_has_coeffs = get_bits1(gb);
2235 if (mb_has_coeffs)
2236 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2237 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2238 GET_MQUANT();
2239 s->current_picture.qscale_table[mb_pos] = mquant;
2240 /* Set DC scale - y and c use the same (not sure if necessary here) */
2241 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2242 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2243 dst_idx = 0;
2244 for (i = 0; i < 6; i++) {
2245 v->a_avail = v->c_avail = 0;
2246 v->mb_type[0][s->block_index[i]] = 1;
2247 s->dc_val[0][s->block_index[i]] = 0;
2248 dst_idx += i >> 2;
2249 val = ((cbp >> (5 - i)) & 1);
2250 if (i == 2 || i == 3 || !s->first_slice_line)
2251 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2252 if (i == 1 || i == 3 || s->mb_x)
2253 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2254
2255 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2256 (i & 4) ? v->codingset2 : v->codingset);
2257 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2258 continue;
2259 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2260 if (i < 4) {
2261 stride_y = s->linesize << fieldtx;
2262 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2263 } else {
2264 stride_y = s->uvlinesize;
2265 off = 0;
2266 }
2267 s->idsp.put_signed_pixels_clamped(s->block[i],
2268 s->dest[dst_idx] + off,
2269 stride_y);
2270 }
2271 } else {
2272 s->mb_intra = v->is_intra[s->mb_x] = 0;
2273
2274 if (v->dmb_is_raw)
2275 direct = get_bits1(gb);
2276 else
2277 direct = v->direct_mb_plane[mb_pos];
2278
2279 if (direct) {
2280 if (s->next_picture_ptr->field_picture)
2281 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2282 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);
2283 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);
2284 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);
2285 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);
2286
2287 if (twomv) {
2288 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);
2289 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);
2290 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);
2291 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);
2292
2293 for (i = 1; i < 4; i += 2) {
2294 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2295 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2296 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2297 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2298 }
2299 } else {
2300 for (i = 1; i < 4; i++) {
2301 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2302 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2303 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2304 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2305 }
2306 }
2307 }
2308
2309 if (!direct) {
2310 if (skipped || !s->mb_intra) {
2311 bmvtype = decode012(gb);
2312 switch (bmvtype) {
2313 case 0:
2314 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2315 break;
2316 case 1:
2317 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2318 break;
2319 case 2:
2320 bmvtype = BMV_TYPE_INTERPOLATED;
2321 }
2322 }
2323
2324 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2325 mvsw = get_bits1(gb);
2326 }
2327
2328 if (!skipped) { // inter MB
2329 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2330 if (mb_has_coeffs)
2331 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2332 if (!direct) {
2333 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2334 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2335 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2336 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2337 }
2338 }
2339
2340 for (i = 0; i < 6; i++)
2341 v->mb_type[0][s->block_index[i]] = 0;
2342 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2343 /* for all motion vector read MVDATA and motion compensate each block */
2344 dst_idx = 0;
2345 if (direct) {
2346 if (twomv) {
2347 for (i = 0; i < 4; i++) {
2348 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2349 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2350 }
2351 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2352 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2353 } else {
2354 ff_vc1_mc_1mv(v, 0);
2355 ff_vc1_interp_mc(v);
2356 }
2357 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2358 mvbp = v->fourmvbp;
2359 for (i = 0; i < 4; i++) {
2360 dir = i==1 || i==3;
2361 dmv_x = dmv_y = 0;
2362 val = ((mvbp >> (3 - i)) & 1);
2363 if (val)
2364 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2365 j = i > 1 ? 2 : 0;
2366 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir);
2367 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2368 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2369 }
2370
2371 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2372 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2373 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2374 mvbp = v->twomvbp;
2375 dmv_x = dmv_y = 0;
2376 if (mvbp & 2)
2377 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2378
2379 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 0);
2380 ff_vc1_mc_1mv(v, 0);
2381
2382 dmv_x = dmv_y = 0;
2383 if (mvbp & 1)
2384 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2385
2386 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 1);
2387 ff_vc1_interp_mc(v);
2388 } else if (twomv) {
2389 dir = bmvtype == BMV_TYPE_BACKWARD;
2390 dir2 = dir;
2391 if (mvsw)
2392 dir2 = !dir;
2393 mvbp = v->twomvbp;
2394 dmv_x = dmv_y = 0;
2395 if (mvbp & 2)
2396 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2397 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir);
2398
2399 dmv_x = dmv_y = 0;
2400 if (mvbp & 1)
2401 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2402 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir2);
2403
2404 if (mvsw) {
2405 for (i = 0; i < 2; i++) {
2406 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];
2407 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];
2408 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];
2409 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];
2410 }
2411 } else {
2412 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2413 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, !dir);
2414 }
2415
2416 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2417 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2418 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2419 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2420 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2421 } else {
2422 dir = bmvtype == BMV_TYPE_BACKWARD;
2423
2424 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2425 dmv_x = dmv_y = 0;
2426 if (mvbp)
2427 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2428
2429 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, dir);
2430 v->blk_mv_type[s->block_index[0]] = 1;
2431 v->blk_mv_type[s->block_index[1]] = 1;
2432 v->blk_mv_type[s->block_index[2]] = 1;
2433 v->blk_mv_type[s->block_index[3]] = 1;
2434 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2435 for (i = 0; i < 2; i++) {
2436 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];
2437 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];
2438 }
2439 ff_vc1_mc_1mv(v, dir);
2440 }
2441
2442 if (cbp)
2443 GET_MQUANT(); // p. 227
2444 s->current_picture.qscale_table[mb_pos] = mquant;
2445 if (!v->ttmbf && cbp)
2446 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2447 for (i = 0; i < 6; i++) {
2448 s->dc_val[0][s->block_index[i]] = 0;
2449 dst_idx += i >> 2;
2450 val = ((cbp >> (5 - i)) & 1);
2451 if (!fieldtx)
2452 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2453 else
2454 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2455 if (val) {
2456 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2457 first_block, s->dest[dst_idx] + off,
2458 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2459 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2460 if (pat < 0)
2461 return pat;
2462 block_cbp |= pat << (i << 2);
2463 if (!v->ttmbf && ttmb < 8)
2464 ttmb = -1;
2465 first_block = 0;
2466 }
2467 }
2468
2469 } else { // skipped
2470 dir = 0;
2471 for (i = 0; i < 6; i++) {
2472 v->mb_type[0][s->block_index[i]] = 0;
2473 s->dc_val[0][s->block_index[i]] = 0;
2474 }
2475 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2476 s->current_picture.qscale_table[mb_pos] = 0;
2477 v->blk_mv_type[s->block_index[0]] = 0;
2478 v->blk_mv_type[s->block_index[1]] = 0;
2479 v->blk_mv_type[s->block_index[2]] = 0;
2480 v->blk_mv_type[s->block_index[3]] = 0;
2481
2482 if (!direct) {
2483 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2484 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 0);
2485 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 1);
2486 } else {
2487 dir = bmvtype == BMV_TYPE_BACKWARD;
2488 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, dir);
2489 if (mvsw) {
2490 int dir2 = dir;
2491 if (mvsw)
2492 dir2 = !dir;
2493 for (i = 0; i < 2; i++) {
2494 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];
2495 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];
2496 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];
2497 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];
2498 }
2499 } else {
2500 v->blk_mv_type[s->block_index[0]] = 1;
2501 v->blk_mv_type[s->block_index[1]] = 1;
2502 v->blk_mv_type[s->block_index[2]] = 1;
2503 v->blk_mv_type[s->block_index[3]] = 1;
2504 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2505 for (i = 0; i < 2; i++) {
2506 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];
2507 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];
2508 }
2509 }
2510 }
2511 }
2512
2513 ff_vc1_mc_1mv(v, dir);
2514 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2515 ff_vc1_interp_mc(v);
2516 }
2517 v->fieldtx_plane[mb_pos] = 0;
2518 }
2519 }
2520 v->cbp[s->mb_x] = block_cbp;
2521 v->ttblk[s->mb_x] = block_tt;
2522
2523 return 0;
2524 }
2525
2526 /** Decode blocks of I-frame
2527 */
vc1_decode_i_blocks(VC1Context * v)2528 static void vc1_decode_i_blocks(VC1Context *v)
2529 {
2530 int k, j;
2531 MpegEncContext *s = &v->s;
2532 int cbp, val;
2533 uint8_t *coded_val;
2534 int mb_pos;
2535
2536 /* select coding mode used for VLC tables selection */
2537 switch (v->y_ac_table_index) {
2538 case 0:
2539 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2540 break;
2541 case 1:
2542 v->codingset = CS_HIGH_MOT_INTRA;
2543 break;
2544 case 2:
2545 v->codingset = CS_MID_RATE_INTRA;
2546 break;
2547 }
2548
2549 switch (v->c_ac_table_index) {
2550 case 0:
2551 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2552 break;
2553 case 1:
2554 v->codingset2 = CS_HIGH_MOT_INTER;
2555 break;
2556 case 2:
2557 v->codingset2 = CS_MID_RATE_INTER;
2558 break;
2559 }
2560
2561 /* Set DC scale - y and c use the same */
2562 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2563 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2564
2565 //do frame decode
2566 s->mb_x = s->mb_y = 0;
2567 s->mb_intra = 1;
2568 s->first_slice_line = 1;
2569 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2570 s->mb_x = 0;
2571 init_block_index(v);
2572 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2573 ff_update_block_index(s);
2574 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2575 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2576 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2577 s->current_picture.qscale_table[mb_pos] = v->pq;
2578 for (int i = 0; i < 4; i++) {
2579 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2580 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2581 }
2582
2583 // do actual MB decoding and displaying
2584 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2585 v->s.ac_pred = get_bits1(&v->s.gb);
2586
2587 for (k = 0; k < 6; k++) {
2588 v->mb_type[0][s->block_index[k]] = 1;
2589
2590 val = ((cbp >> (5 - k)) & 1);
2591
2592 if (k < 4) {
2593 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2594 val = val ^ pred;
2595 *coded_val = val;
2596 }
2597 cbp |= val << (5 - k);
2598
2599 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2600
2601 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2602 continue;
2603 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2604 }
2605
2606 if (v->overlap && v->pq >= 9) {
2607 ff_vc1_i_overlap_filter(v);
2608 if (v->rangeredfrm)
2609 for (k = 0; k < 6; k++)
2610 for (j = 0; j < 64; j++)
2611 v->block[v->cur_blk_idx][block_map[k]][j] *= 2;
2612 vc1_put_blocks_clamped(v, 1);
2613 } else {
2614 if (v->rangeredfrm)
2615 for (k = 0; k < 6; k++)
2616 for (j = 0; j < 64; j++)
2617 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2;
2618 vc1_put_blocks_clamped(v, 0);
2619 }
2620
2621 if (v->s.loop_filter)
2622 ff_vc1_i_loop_filter(v);
2623
2624 if (get_bits_left(&s->gb) < 0) {
2625 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2626 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2627 get_bits_count(&s->gb), s->gb.size_in_bits);
2628 return;
2629 }
2630
2631 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2632 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2633 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2634 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2635 }
2636 if (!v->s.loop_filter)
2637 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2638 else if (s->mb_y)
2639 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2640
2641 s->first_slice_line = 0;
2642 }
2643 if (v->s.loop_filter)
2644 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2645
2646 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2647 * profile, these only differ are when decoding MSS2 rectangles. */
2648 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2649 }
2650
2651 /** Decode blocks of I-frame for advanced profile
2652 */
vc1_decode_i_blocks_adv(VC1Context * v)2653 static int vc1_decode_i_blocks_adv(VC1Context *v)
2654 {
2655 int k;
2656 MpegEncContext *s = &v->s;
2657 int cbp, val;
2658 uint8_t *coded_val;
2659 int mb_pos;
2660 int mquant;
2661 int mqdiff;
2662 GetBitContext *gb = &s->gb;
2663
2664 if (get_bits_left(gb) <= 1)
2665 return AVERROR_INVALIDDATA;
2666
2667 /* select coding mode used for VLC tables selection */
2668 switch (v->y_ac_table_index) {
2669 case 0:
2670 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2671 break;
2672 case 1:
2673 v->codingset = CS_HIGH_MOT_INTRA;
2674 break;
2675 case 2:
2676 v->codingset = CS_MID_RATE_INTRA;
2677 break;
2678 }
2679
2680 switch (v->c_ac_table_index) {
2681 case 0:
2682 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2683 break;
2684 case 1:
2685 v->codingset2 = CS_HIGH_MOT_INTER;
2686 break;
2687 case 2:
2688 v->codingset2 = CS_MID_RATE_INTER;
2689 break;
2690 }
2691
2692 // do frame decode
2693 s->mb_x = s->mb_y = 0;
2694 s->mb_intra = 1;
2695 s->first_slice_line = 1;
2696 s->mb_y = s->start_mb_y;
2697 if (s->start_mb_y) {
2698 s->mb_x = 0;
2699 init_block_index(v);
2700 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2701 (1 + s->b8_stride) * sizeof(*s->coded_block));
2702 }
2703 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2704 s->mb_x = 0;
2705 init_block_index(v);
2706 for (;s->mb_x < s->mb_width; s->mb_x++) {
2707 mquant = v->pq;
2708 ff_update_block_index(s);
2709 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2710 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2711 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2712 for (int i = 0; i < 4; i++) {
2713 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2714 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2715 }
2716
2717 // do actual MB decoding and displaying
2718 if (v->fieldtx_is_raw)
2719 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2720 if (get_bits_left(&v->s.gb) <= 1) {
2721 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2722 return 0;
2723 }
2724
2725 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2726 if (v->acpred_is_raw)
2727 v->s.ac_pred = get_bits1(&v->s.gb);
2728 else
2729 v->s.ac_pred = v->acpred_plane[mb_pos];
2730
2731 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2732 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2733
2734 GET_MQUANT();
2735
2736 s->current_picture.qscale_table[mb_pos] = mquant;
2737 /* Set DC scale - y and c use the same */
2738 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2739 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2740
2741 for (k = 0; k < 6; k++) {
2742 v->mb_type[0][s->block_index[k]] = 1;
2743
2744 val = ((cbp >> (5 - k)) & 1);
2745
2746 if (k < 4) {
2747 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2748 val = val ^ pred;
2749 *coded_val = val;
2750 }
2751 cbp |= val << (5 - k);
2752
2753 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2754 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2755
2756 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2757 (k < 4) ? v->codingset : v->codingset2, mquant);
2758
2759 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2760 continue;
2761 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2762 }
2763
2764 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2765 ff_vc1_i_overlap_filter(v);
2766 vc1_put_blocks_clamped(v, 1);
2767 if (v->s.loop_filter)
2768 ff_vc1_i_loop_filter(v);
2769
2770 if (get_bits_left(&s->gb) < 0) {
2771 // TODO: may need modification to handle slice coding
2772 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2773 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2774 get_bits_count(&s->gb), s->gb.size_in_bits);
2775 return 0;
2776 }
2777 inc_blk_idx(v->topleft_blk_idx);
2778 inc_blk_idx(v->top_blk_idx);
2779 inc_blk_idx(v->left_blk_idx);
2780 inc_blk_idx(v->cur_blk_idx);
2781 }
2782 if (!v->s.loop_filter)
2783 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2784 else if (s->mb_y)
2785 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2786 s->first_slice_line = 0;
2787 }
2788
2789 if (v->s.loop_filter)
2790 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2791 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2792 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2793 return 0;
2794 }
2795
vc1_decode_p_blocks(VC1Context * v)2796 static void vc1_decode_p_blocks(VC1Context *v)
2797 {
2798 MpegEncContext *s = &v->s;
2799 int apply_loop_filter;
2800
2801 /* select coding mode used for VLC tables selection */
2802 switch (v->c_ac_table_index) {
2803 case 0:
2804 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2805 break;
2806 case 1:
2807 v->codingset = CS_HIGH_MOT_INTRA;
2808 break;
2809 case 2:
2810 v->codingset = CS_MID_RATE_INTRA;
2811 break;
2812 }
2813
2814 switch (v->c_ac_table_index) {
2815 case 0:
2816 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2817 break;
2818 case 1:
2819 v->codingset2 = CS_HIGH_MOT_INTER;
2820 break;
2821 case 2:
2822 v->codingset2 = CS_MID_RATE_INTER;
2823 break;
2824 }
2825
2826 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2827 s->first_slice_line = 1;
2828 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2829 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2830 s->mb_x = 0;
2831 init_block_index(v);
2832 for (; s->mb_x < s->mb_width; s->mb_x++) {
2833 ff_update_block_index(s);
2834
2835 if (v->fcm == ILACE_FIELD || (v->fcm == PROGRESSIVE && v->mv_type_is_raw) || v->skip_is_raw)
2836 if (get_bits_left(&v->s.gb) <= 1) {
2837 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2838 return;
2839 }
2840
2841 if (v->fcm == ILACE_FIELD) {
2842 vc1_decode_p_mb_intfi(v);
2843 if (apply_loop_filter)
2844 ff_vc1_p_loop_filter(v);
2845 } else if (v->fcm == ILACE_FRAME) {
2846 vc1_decode_p_mb_intfr(v);
2847 if (apply_loop_filter)
2848 ff_vc1_p_intfr_loop_filter(v);
2849 } else {
2850 vc1_decode_p_mb(v);
2851 if (apply_loop_filter)
2852 ff_vc1_p_loop_filter(v);
2853 }
2854 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2855 // TODO: may need modification to handle slice coding
2856 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2857 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2858 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2859 return;
2860 }
2861 inc_blk_idx(v->topleft_blk_idx);
2862 inc_blk_idx(v->top_blk_idx);
2863 inc_blk_idx(v->left_blk_idx);
2864 inc_blk_idx(v->cur_blk_idx);
2865 }
2866 memmove(v->cbp_base,
2867 v->cbp - s->mb_stride,
2868 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2869 memmove(v->ttblk_base,
2870 v->ttblk - s->mb_stride,
2871 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2872 memmove(v->is_intra_base,
2873 v->is_intra - s->mb_stride,
2874 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2875 memmove(v->luma_mv_base,
2876 v->luma_mv - s->mb_stride,
2877 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2878 if (s->mb_y != s->start_mb_y)
2879 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2880 s->first_slice_line = 0;
2881 }
2882 if (s->end_mb_y >= s->start_mb_y)
2883 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2884 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2885 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2886 }
2887
vc1_decode_b_blocks(VC1Context * v)2888 static void vc1_decode_b_blocks(VC1Context *v)
2889 {
2890 MpegEncContext *s = &v->s;
2891
2892 /* select coding mode used for VLC tables selection */
2893 switch (v->c_ac_table_index) {
2894 case 0:
2895 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2896 break;
2897 case 1:
2898 v->codingset = CS_HIGH_MOT_INTRA;
2899 break;
2900 case 2:
2901 v->codingset = CS_MID_RATE_INTRA;
2902 break;
2903 }
2904
2905 switch (v->c_ac_table_index) {
2906 case 0:
2907 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2908 break;
2909 case 1:
2910 v->codingset2 = CS_HIGH_MOT_INTER;
2911 break;
2912 case 2:
2913 v->codingset2 = CS_MID_RATE_INTER;
2914 break;
2915 }
2916
2917 s->first_slice_line = 1;
2918 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2919 s->mb_x = 0;
2920 init_block_index(v);
2921 for (; s->mb_x < s->mb_width; s->mb_x++) {
2922 ff_update_block_index(s);
2923
2924 if (v->fcm == ILACE_FIELD || v->skip_is_raw || v->dmb_is_raw)
2925 if (get_bits_left(&v->s.gb) <= 1) {
2926 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2927 return;
2928 }
2929
2930 if (v->fcm == ILACE_FIELD) {
2931 vc1_decode_b_mb_intfi(v);
2932 if (v->s.loop_filter)
2933 ff_vc1_b_intfi_loop_filter(v);
2934 } else if (v->fcm == ILACE_FRAME) {
2935 vc1_decode_b_mb_intfr(v);
2936 if (v->s.loop_filter)
2937 ff_vc1_p_intfr_loop_filter(v);
2938 } else {
2939 vc1_decode_b_mb(v);
2940 if (v->s.loop_filter)
2941 ff_vc1_i_loop_filter(v);
2942 }
2943 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2944 // TODO: may need modification to handle slice coding
2945 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2946 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2947 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2948 return;
2949 }
2950 }
2951 memmove(v->cbp_base,
2952 v->cbp - s->mb_stride,
2953 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2954 memmove(v->ttblk_base,
2955 v->ttblk - s->mb_stride,
2956 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2957 memmove(v->is_intra_base,
2958 v->is_intra - s->mb_stride,
2959 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2960 if (!v->s.loop_filter)
2961 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2962 else if (s->mb_y)
2963 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2964 s->first_slice_line = 0;
2965 }
2966 if (v->s.loop_filter)
2967 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2968 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2969 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2970 }
2971
vc1_decode_skip_blocks(VC1Context * v)2972 static void vc1_decode_skip_blocks(VC1Context *v)
2973 {
2974 MpegEncContext *s = &v->s;
2975
2976 if (!v->s.last_picture.f->data[0])
2977 return;
2978
2979 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2980 s->first_slice_line = 1;
2981 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2982 s->mb_x = 0;
2983 init_block_index(v);
2984 ff_update_block_index(s);
2985 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2986 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2987 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2988 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2989 s->first_slice_line = 0;
2990 }
2991 s->pict_type = AV_PICTURE_TYPE_P;
2992 }
2993
ff_vc1_decode_blocks(VC1Context * v)2994 void ff_vc1_decode_blocks(VC1Context *v)
2995 {
2996
2997 v->s.esc3_level_length = 0;
2998 if (v->x8_type) {
2999 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
3000 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
3001 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
3002 v->s.loop_filter, v->s.low_delay);
3003
3004 ff_er_add_slice(&v->s.er, 0, 0,
3005 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
3006 ER_MB_END);
3007 } else {
3008 v->cur_blk_idx = 0;
3009 v->left_blk_idx = -1;
3010 v->topleft_blk_idx = 1;
3011 v->top_blk_idx = 2;
3012 switch (v->s.pict_type) {
3013 case AV_PICTURE_TYPE_I:
3014 if (v->profile == PROFILE_ADVANCED)
3015 vc1_decode_i_blocks_adv(v);
3016 else
3017 vc1_decode_i_blocks(v);
3018 break;
3019 case AV_PICTURE_TYPE_P:
3020 if (v->p_frame_skipped)
3021 vc1_decode_skip_blocks(v);
3022 else
3023 vc1_decode_p_blocks(v);
3024 break;
3025 case AV_PICTURE_TYPE_B:
3026 if (v->bi_type) {
3027 if (v->profile == PROFILE_ADVANCED)
3028 vc1_decode_i_blocks_adv(v);
3029 else
3030 vc1_decode_i_blocks(v);
3031 } else
3032 vc1_decode_b_blocks(v);
3033 break;
3034 }
3035 }
3036 }
3037