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