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 < 0) {
596 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
597 return -1;
598 }
599 if (dcdiff) {
600 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
601 if (dcdiff == 119 /* ESC index value */) {
602 dcdiff = get_bits(gb, 8 + m);
603 } else {
604 if (m)
605 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
606 }
607 if (get_bits1(gb))
608 dcdiff = -dcdiff;
609 }
610
611 /* Prediction */
612 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
613 *dc_val = dcdiff;
614
615 /* Store the quantized DC coeff, used for prediction */
616 if (n < 4)
617 scale = s->y_dc_scale;
618 else
619 scale = s->c_dc_scale;
620 block[0] = dcdiff * scale;
621
622 ac_val = s->ac_val[0][s->block_index[n]];
623 ac_val2 = ac_val;
624 if (dc_pred_dir) // left
625 ac_val -= 16;
626 else // top
627 ac_val -= 16 * s->block_wrap[n];
628
629 scale = v->pq * 2 + v->halfpq;
630
631 //AC Decoding
632 i = !!coded;
633
634 if (coded) {
635 int last = 0, skip, value;
636 const uint8_t *zz_table;
637 int k;
638
639 if (v->s.ac_pred) {
640 if (!dc_pred_dir)
641 zz_table = v->zz_8x8[2];
642 else
643 zz_table = v->zz_8x8[3];
644 } else
645 zz_table = v->zz_8x8[1];
646
647 while (!last) {
648 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
649 if (ret < 0)
650 return ret;
651 i += skip;
652 if (i > 63)
653 break;
654 block[zz_table[i++]] = value;
655 }
656
657 /* apply AC prediction if needed */
658 if (s->ac_pred) {
659 int sh;
660 if (dc_pred_dir) { // left
661 sh = v->left_blk_sh;
662 } else { // top
663 sh = v->top_blk_sh;
664 ac_val += 8;
665 }
666 for (k = 1; k < 8; k++)
667 block[k << sh] += ac_val[k];
668 }
669 /* save AC coeffs for further prediction */
670 for (k = 1; k < 8; k++) {
671 ac_val2[k] = block[k << v->left_blk_sh];
672 ac_val2[k + 8] = block[k << v->top_blk_sh];
673 }
674
675 /* scale AC coeffs */
676 for (k = 1; k < 64; k++)
677 if (block[k]) {
678 block[k] *= scale;
679 if (!v->pquantizer)
680 block[k] += (block[k] < 0) ? -v->pq : v->pq;
681 }
682
683 } else {
684 int k;
685
686 memset(ac_val2, 0, 16 * 2);
687
688 /* apply AC prediction if needed */
689 if (s->ac_pred) {
690 int sh;
691 if (dc_pred_dir) { //left
692 sh = v->left_blk_sh;
693 } else { // top
694 sh = v->top_blk_sh;
695 ac_val += 8;
696 ac_val2 += 8;
697 }
698 memcpy(ac_val2, ac_val, 8 * 2);
699 for (k = 1; k < 8; k++) {
700 block[k << sh] = ac_val[k] * scale;
701 if (!v->pquantizer && block[k << sh])
702 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
703 }
704 }
705 }
706 if (s->ac_pred) i = 63;
707 s->block_last_index[n] = i;
708
709 return 0;
710 }
711
712 /** Decode intra block in intra frames - should be faster than decode_intra_block
713 * @param v VC1Context
714 * @param block block to decode
715 * @param[in] n subblock number
716 * @param coded are AC coeffs present or not
717 * @param codingset set of VLC to decode data
718 * @param mquant quantizer value for this macroblock
719 */
vc1_decode_i_block_adv(VC1Context * v,int16_t block[64],int n,int coded,int codingset,int mquant)720 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
721 int coded, int codingset, int mquant)
722 {
723 GetBitContext *gb = &v->s.gb;
724 MpegEncContext *s = &v->s;
725 int dc_pred_dir = 0; /* Direction of the DC prediction used */
726 int i;
727 int16_t *dc_val = NULL;
728 int16_t *ac_val, *ac_val2;
729 int dcdiff;
730 int a_avail = v->a_avail, c_avail = v->c_avail;
731 int use_pred = s->ac_pred;
732 int scale;
733 int q1, q2 = 0;
734 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
735 int quant = FFABS(mquant);
736
737 /* Get DC differential */
738 if (n < 4) {
739 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
740 } else {
741 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
742 }
743 if (dcdiff < 0) {
744 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
745 return -1;
746 }
747 if (dcdiff) {
748 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
749 if (dcdiff == 119 /* ESC index value */) {
750 dcdiff = get_bits(gb, 8 + m);
751 } else {
752 if (m)
753 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
754 }
755 if (get_bits1(gb))
756 dcdiff = -dcdiff;
757 }
758
759 /* Prediction */
760 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
761 *dc_val = dcdiff;
762
763 /* Store the quantized DC coeff, used for prediction */
764 if (n < 4)
765 scale = s->y_dc_scale;
766 else
767 scale = s->c_dc_scale;
768 block[0] = dcdiff * scale;
769
770 /* check if AC is needed at all */
771 if (!a_avail && !c_avail)
772 use_pred = 0;
773
774 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
775
776 ac_val = s->ac_val[0][s->block_index[n]];
777 ac_val2 = ac_val;
778 if (dc_pred_dir) // left
779 ac_val -= 16;
780 else // top
781 ac_val -= 16 * s->block_wrap[n];
782
783 q1 = s->current_picture.qscale_table[mb_pos];
784 if (n == 3)
785 q2 = q1;
786 else if (dc_pred_dir) {
787 if (n == 1)
788 q2 = q1;
789 else if (c_avail && mb_pos)
790 q2 = s->current_picture.qscale_table[mb_pos - 1];
791 } else {
792 if (n == 2)
793 q2 = q1;
794 else if (a_avail && mb_pos >= s->mb_stride)
795 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
796 }
797
798 //AC Decoding
799 i = 1;
800
801 if (coded) {
802 int last = 0, skip, value;
803 const uint8_t *zz_table;
804 int k;
805
806 if (v->s.ac_pred) {
807 if (!use_pred && v->fcm == ILACE_FRAME) {
808 zz_table = v->zzi_8x8;
809 } else {
810 if (!dc_pred_dir) // top
811 zz_table = v->zz_8x8[2];
812 else // left
813 zz_table = v->zz_8x8[3];
814 }
815 } else {
816 if (v->fcm != ILACE_FRAME)
817 zz_table = v->zz_8x8[1];
818 else
819 zz_table = v->zzi_8x8;
820 }
821
822 while (!last) {
823 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
824 if (ret < 0)
825 return ret;
826 i += skip;
827 if (i > 63)
828 break;
829 block[zz_table[i++]] = value;
830 }
831
832 /* apply AC prediction if needed */
833 if (use_pred) {
834 int sh;
835 if (dc_pred_dir) { // left
836 sh = v->left_blk_sh;
837 } else { // top
838 sh = v->top_blk_sh;
839 ac_val += 8;
840 }
841 /* scale predictors if needed*/
842 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
843 if (q1 < 1)
844 return AVERROR_INVALIDDATA;
845 if (q2)
846 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
847 if (q2 && q1 != q2) {
848 for (k = 1; k < 8; k++)
849 block[k << sh] += (int)(ac_val[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
850 } else {
851 for (k = 1; k < 8; k++)
852 block[k << sh] += ac_val[k];
853 }
854 }
855 /* save AC coeffs for further prediction */
856 for (k = 1; k < 8; k++) {
857 ac_val2[k ] = block[k << v->left_blk_sh];
858 ac_val2[k + 8] = block[k << v->top_blk_sh];
859 }
860
861 /* scale AC coeffs */
862 for (k = 1; k < 64; k++)
863 if (block[k]) {
864 block[k] *= scale;
865 if (!v->pquantizer)
866 block[k] += (block[k] < 0) ? -quant : quant;
867 }
868
869 } else { // no AC coeffs
870 int k;
871
872 memset(ac_val2, 0, 16 * 2);
873
874 /* apply AC prediction if needed */
875 if (use_pred) {
876 int sh;
877 if (dc_pred_dir) { // left
878 sh = v->left_blk_sh;
879 } else { // top
880 sh = v->top_blk_sh;
881 ac_val += 8;
882 ac_val2 += 8;
883 }
884 memcpy(ac_val2, ac_val, 8 * 2);
885 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
886 if (q1 < 1)
887 return AVERROR_INVALIDDATA;
888 if (q2)
889 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
890 if (q2 && q1 != q2) {
891 for (k = 1; k < 8; k++)
892 ac_val2[k] = (int)(ac_val2[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
893 }
894 for (k = 1; k < 8; k++) {
895 block[k << sh] = ac_val2[k] * scale;
896 if (!v->pquantizer && block[k << sh])
897 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
898 }
899 }
900 }
901 if (use_pred) i = 63;
902 s->block_last_index[n] = i;
903
904 return 0;
905 }
906
907 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
908 * @param v VC1Context
909 * @param block block to decode
910 * @param[in] n subblock index
911 * @param coded are AC coeffs present or not
912 * @param mquant block quantizer
913 * @param codingset set of VLC to decode data
914 */
vc1_decode_intra_block(VC1Context * v,int16_t block[64],int n,int coded,int mquant,int codingset)915 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
916 int coded, int mquant, int codingset)
917 {
918 GetBitContext *gb = &v->s.gb;
919 MpegEncContext *s = &v->s;
920 int dc_pred_dir = 0; /* Direction of the DC prediction used */
921 int i;
922 int16_t *dc_val = NULL;
923 int16_t *ac_val, *ac_val2;
924 int dcdiff;
925 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
926 int a_avail = v->a_avail, c_avail = v->c_avail;
927 int use_pred = s->ac_pred;
928 int scale;
929 int q1, q2 = 0;
930 int quant = FFABS(mquant);
931
932 s->bdsp.clear_block(block);
933
934 /* XXX: Guard against dumb values of mquant */
935 quant = av_clip_uintp2(quant, 5);
936
937 /* Set DC scale - y and c use the same */
938 s->y_dc_scale = s->y_dc_scale_table[quant];
939 s->c_dc_scale = s->c_dc_scale_table[quant];
940
941 /* Get DC differential */
942 if (n < 4) {
943 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
944 } else {
945 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
946 }
947 if (dcdiff < 0) {
948 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
949 return -1;
950 }
951 if (dcdiff) {
952 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
953 if (dcdiff == 119 /* ESC index value */) {
954 dcdiff = get_bits(gb, 8 + m);
955 } else {
956 if (m)
957 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
958 }
959 if (get_bits1(gb))
960 dcdiff = -dcdiff;
961 }
962
963 /* Prediction */
964 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
965 *dc_val = dcdiff;
966
967 /* Store the quantized DC coeff, used for prediction */
968
969 if (n < 4) {
970 block[0] = dcdiff * s->y_dc_scale;
971 } else {
972 block[0] = dcdiff * s->c_dc_scale;
973 }
974
975 //AC Decoding
976 i = 1;
977
978 /* check if AC is needed at all and adjust direction if needed */
979 if (!a_avail) dc_pred_dir = 1;
980 if (!c_avail) dc_pred_dir = 0;
981 if (!a_avail && !c_avail) use_pred = 0;
982 ac_val = s->ac_val[0][s->block_index[n]];
983 ac_val2 = ac_val;
984
985 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
986
987 if (dc_pred_dir) //left
988 ac_val -= 16;
989 else //top
990 ac_val -= 16 * s->block_wrap[n];
991
992 q1 = s->current_picture.qscale_table[mb_pos];
993 if (dc_pred_dir && c_avail && mb_pos)
994 q2 = s->current_picture.qscale_table[mb_pos - 1];
995 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
996 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
997 if (dc_pred_dir && n == 1)
998 q2 = q1;
999 if (!dc_pred_dir && n == 2)
1000 q2 = q1;
1001 if (n == 3) q2 = q1;
1002
1003 if (coded) {
1004 int last = 0, skip, value;
1005 int k;
1006
1007 while (!last) {
1008 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
1009 if (ret < 0)
1010 return ret;
1011 i += skip;
1012 if (i > 63)
1013 break;
1014 if (v->fcm == PROGRESSIVE)
1015 block[v->zz_8x8[0][i++]] = value;
1016 else {
1017 if (use_pred && (v->fcm == ILACE_FRAME)) {
1018 if (!dc_pred_dir) // top
1019 block[v->zz_8x8[2][i++]] = value;
1020 else // left
1021 block[v->zz_8x8[3][i++]] = value;
1022 } else {
1023 block[v->zzi_8x8[i++]] = value;
1024 }
1025 }
1026 }
1027
1028 /* apply AC prediction if needed */
1029 if (use_pred) {
1030 /* scale predictors if needed*/
1031 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1032 if (q1 < 1)
1033 return AVERROR_INVALIDDATA;
1034 if (q2)
1035 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1036 if (q2 && q1 != q2) {
1037 if (dc_pred_dir) { // left
1038 for (k = 1; k < 8; k++)
1039 block[k << v->left_blk_sh] += (int)(ac_val[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1040 } else { //top
1041 for (k = 1; k < 8; k++)
1042 block[k << v->top_blk_sh] += (int)(ac_val[k + 8] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1043 }
1044 } else {
1045 if (dc_pred_dir) { // left
1046 for (k = 1; k < 8; k++)
1047 block[k << v->left_blk_sh] += ac_val[k];
1048 } else { // top
1049 for (k = 1; k < 8; k++)
1050 block[k << v->top_blk_sh] += ac_val[k + 8];
1051 }
1052 }
1053 }
1054 /* save AC coeffs for further prediction */
1055 for (k = 1; k < 8; k++) {
1056 ac_val2[k ] = block[k << v->left_blk_sh];
1057 ac_val2[k + 8] = block[k << v->top_blk_sh];
1058 }
1059
1060 /* scale AC coeffs */
1061 for (k = 1; k < 64; k++)
1062 if (block[k]) {
1063 block[k] *= scale;
1064 if (!v->pquantizer)
1065 block[k] += (block[k] < 0) ? -quant : quant;
1066 }
1067
1068 if (use_pred) i = 63;
1069 } else { // no AC coeffs
1070 int k;
1071
1072 memset(ac_val2, 0, 16 * 2);
1073 if (dc_pred_dir) { // left
1074 if (use_pred) {
1075 memcpy(ac_val2, ac_val, 8 * 2);
1076 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1077 if (q1 < 1)
1078 return AVERROR_INVALIDDATA;
1079 if (q2)
1080 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1081 if (q2 && q1 != q2) {
1082 for (k = 1; k < 8; k++)
1083 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1084 }
1085 }
1086 } else { // top
1087 if (use_pred) {
1088 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1089 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1090 if (q1 < 1)
1091 return AVERROR_INVALIDDATA;
1092 if (q2)
1093 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1094 if (q2 && q1 != q2) {
1095 for (k = 1; k < 8; k++)
1096 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1097 }
1098 }
1099 }
1100
1101 /* apply AC prediction if needed */
1102 if (use_pred) {
1103 if (dc_pred_dir) { // left
1104 for (k = 1; k < 8; k++) {
1105 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1106 if (!v->pquantizer && block[k << v->left_blk_sh])
1107 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1108 }
1109 } else { // top
1110 for (k = 1; k < 8; k++) {
1111 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1112 if (!v->pquantizer && block[k << v->top_blk_sh])
1113 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1114 }
1115 }
1116 i = 63;
1117 }
1118 }
1119 s->block_last_index[n] = i;
1120
1121 return 0;
1122 }
1123
1124 /** Decode P block
1125 */
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)1126 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1127 int mquant, int ttmb, int first_block,
1128 uint8_t *dst, int linesize, int skip_block,
1129 int *ttmb_out)
1130 {
1131 MpegEncContext *s = &v->s;
1132 GetBitContext *gb = &s->gb;
1133 int i, j;
1134 int subblkpat = 0;
1135 int scale, off, idx, last, skip, value;
1136 int ttblk = ttmb & 7;
1137 int pat = 0;
1138 int quant = FFABS(mquant);
1139
1140 s->bdsp.clear_block(block);
1141
1142 if (ttmb == -1) {
1143 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)];
1144 }
1145 if (ttblk == TT_4X4) {
1146 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1147 }
1148 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1149 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1150 || (!v->res_rtm_flag && !first_block))) {
1151 subblkpat = decode012(gb);
1152 if (subblkpat)
1153 subblkpat ^= 3; // swap decoded pattern bits
1154 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1155 ttblk = TT_8X4;
1156 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1157 ttblk = TT_4X8;
1158 }
1159 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1160
1161 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1162 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1163 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1164 ttblk = TT_8X4;
1165 }
1166 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1167 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1168 ttblk = TT_4X8;
1169 }
1170 switch (ttblk) {
1171 case TT_8X8:
1172 pat = 0xF;
1173 i = 0;
1174 last = 0;
1175 while (!last) {
1176 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1177 if (ret < 0)
1178 return ret;
1179 i += skip;
1180 if (i > 63)
1181 break;
1182 if (!v->fcm)
1183 idx = v->zz_8x8[0][i++];
1184 else
1185 idx = v->zzi_8x8[i++];
1186 block[idx] = value * scale;
1187 if (!v->pquantizer)
1188 block[idx] += (block[idx] < 0) ? -quant : quant;
1189 }
1190 if (!skip_block) {
1191 if (i == 1)
1192 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1193 else {
1194 v->vc1dsp.vc1_inv_trans_8x8(block);
1195 s->idsp.add_pixels_clamped(block, dst, linesize);
1196 }
1197 }
1198 break;
1199 case TT_4X4:
1200 pat = ~subblkpat & 0xF;
1201 for (j = 0; j < 4; j++) {
1202 last = subblkpat & (1 << (3 - j));
1203 i = 0;
1204 off = (j & 1) * 4 + (j & 2) * 16;
1205 while (!last) {
1206 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1207 if (ret < 0)
1208 return ret;
1209 i += skip;
1210 if (i > 15)
1211 break;
1212 if (!v->fcm)
1213 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1214 else
1215 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1216 block[idx + off] = value * scale;
1217 if (!v->pquantizer)
1218 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1219 }
1220 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1221 if (i == 1)
1222 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1223 else
1224 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1225 }
1226 }
1227 break;
1228 case TT_8X4:
1229 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1230 for (j = 0; j < 2; j++) {
1231 last = subblkpat & (1 << (1 - j));
1232 i = 0;
1233 off = j * 32;
1234 while (!last) {
1235 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1236 if (ret < 0)
1237 return ret;
1238 i += skip;
1239 if (i > 31)
1240 break;
1241 if (!v->fcm)
1242 idx = v->zz_8x4[i++] + off;
1243 else
1244 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1245 block[idx] = value * scale;
1246 if (!v->pquantizer)
1247 block[idx] += (block[idx] < 0) ? -quant : quant;
1248 }
1249 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1250 if (i == 1)
1251 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1252 else
1253 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1254 }
1255 }
1256 break;
1257 case TT_4X8:
1258 pat = ~(subblkpat * 5) & 0xF;
1259 for (j = 0; j < 2; j++) {
1260 last = subblkpat & (1 << (1 - j));
1261 i = 0;
1262 off = j * 4;
1263 while (!last) {
1264 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1265 if (ret < 0)
1266 return ret;
1267 i += skip;
1268 if (i > 31)
1269 break;
1270 if (!v->fcm)
1271 idx = v->zz_4x8[i++] + off;
1272 else
1273 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1274 block[idx] = value * scale;
1275 if (!v->pquantizer)
1276 block[idx] += (block[idx] < 0) ? -quant : quant;
1277 }
1278 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1279 if (i == 1)
1280 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1281 else
1282 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1283 }
1284 }
1285 break;
1286 }
1287 if (ttmb_out)
1288 *ttmb_out |= ttblk << (n * 4);
1289 return pat;
1290 }
1291
1292 /** @} */ // Macroblock group
1293
1294 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1295
1296 /** Decode one P-frame MB
1297 */
vc1_decode_p_mb(VC1Context * v)1298 static int vc1_decode_p_mb(VC1Context *v)
1299 {
1300 MpegEncContext *s = &v->s;
1301 GetBitContext *gb = &s->gb;
1302 int i, j;
1303 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1304 int cbp; /* cbp decoding stuff */
1305 int mqdiff, mquant; /* MB quantization */
1306 int ttmb = v->ttfrm; /* MB Transform type */
1307
1308 int mb_has_coeffs = 1; /* last_flag */
1309 int dmv_x, dmv_y; /* Differential MV components */
1310 int index, index1; /* LUT indexes */
1311 int val, sign; /* temp values */
1312 int first_block = 1;
1313 int dst_idx, off;
1314 int skipped, fourmv;
1315 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1316
1317 mquant = v->pq; /* lossy initialization */
1318
1319 if (v->mv_type_is_raw)
1320 fourmv = get_bits1(gb);
1321 else
1322 fourmv = v->mv_type_mb_plane[mb_pos];
1323 if (v->skip_is_raw)
1324 skipped = get_bits1(gb);
1325 else
1326 skipped = v->s.mbskip_table[mb_pos];
1327
1328 if (!fourmv) { /* 1MV mode */
1329 if (!skipped) {
1330 GET_MVDATA(dmv_x, dmv_y);
1331
1332 if (s->mb_intra) {
1333 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1334 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1335 }
1336 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1337 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1338
1339 /* FIXME Set DC val for inter block ? */
1340 if (s->mb_intra && !mb_has_coeffs) {
1341 GET_MQUANT();
1342 s->ac_pred = get_bits1(gb);
1343 cbp = 0;
1344 } else if (mb_has_coeffs) {
1345 if (s->mb_intra)
1346 s->ac_pred = get_bits1(gb);
1347 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1348 GET_MQUANT();
1349 } else {
1350 mquant = v->pq;
1351 cbp = 0;
1352 }
1353 s->current_picture.qscale_table[mb_pos] = mquant;
1354
1355 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1356 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1357 VC1_TTMB_VLC_BITS, 2);
1358 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1359 dst_idx = 0;
1360 for (i = 0; i < 6; i++) {
1361 s->dc_val[0][s->block_index[i]] = 0;
1362 dst_idx += i >> 2;
1363 val = ((cbp >> (5 - i)) & 1);
1364 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1365 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1366 if (s->mb_intra) {
1367 /* check if prediction blocks A and C are available */
1368 v->a_avail = v->c_avail = 0;
1369 if (i == 2 || i == 3 || !s->first_slice_line)
1370 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1371 if (i == 1 || i == 3 || s->mb_x)
1372 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1373
1374 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1375 (i & 4) ? v->codingset2 : v->codingset);
1376 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1377 continue;
1378 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1379 if (v->rangeredfrm)
1380 for (j = 0; j < 64; j++)
1381 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1382 block_cbp |= 0xF << (i << 2);
1383 block_intra |= 1 << i;
1384 } else if (val) {
1385 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1386 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1387 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1388 if (pat < 0)
1389 return pat;
1390 block_cbp |= pat << (i << 2);
1391 if (!v->ttmbf && ttmb < 8)
1392 ttmb = -1;
1393 first_block = 0;
1394 }
1395 }
1396 } else { // skipped
1397 s->mb_intra = 0;
1398 for (i = 0; i < 6; i++) {
1399 v->mb_type[0][s->block_index[i]] = 0;
1400 s->dc_val[0][s->block_index[i]] = 0;
1401 }
1402 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1403 s->current_picture.qscale_table[mb_pos] = 0;
1404 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1405 ff_vc1_mc_1mv(v, 0);
1406 }
1407 } else { // 4MV mode
1408 if (!skipped /* unskipped MB */) {
1409 int intra_count = 0, coded_inter = 0;
1410 int is_intra[6], is_coded[6];
1411 /* Get CBPCY */
1412 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1413 for (i = 0; i < 6; i++) {
1414 val = ((cbp >> (5 - i)) & 1);
1415 s->dc_val[0][s->block_index[i]] = 0;
1416 s->mb_intra = 0;
1417 if (i < 4) {
1418 dmv_x = dmv_y = 0;
1419 s->mb_intra = 0;
1420 mb_has_coeffs = 0;
1421 if (val) {
1422 GET_MVDATA(dmv_x, dmv_y);
1423 }
1424 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1425 if (!s->mb_intra)
1426 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1427 intra_count += s->mb_intra;
1428 is_intra[i] = s->mb_intra;
1429 is_coded[i] = mb_has_coeffs;
1430 }
1431 if (i & 4) {
1432 is_intra[i] = (intra_count >= 3);
1433 is_coded[i] = val;
1434 }
1435 if (i == 4)
1436 ff_vc1_mc_4mv_chroma(v, 0);
1437 v->mb_type[0][s->block_index[i]] = is_intra[i];
1438 if (!coded_inter)
1439 coded_inter = !is_intra[i] & is_coded[i];
1440 }
1441 // if there are no coded blocks then don't do anything more
1442 dst_idx = 0;
1443 if (!intra_count && !coded_inter)
1444 goto end;
1445 GET_MQUANT();
1446 s->current_picture.qscale_table[mb_pos] = mquant;
1447 /* test if block is intra and has pred */
1448 {
1449 int intrapred = 0;
1450 for (i = 0; i < 6; i++)
1451 if (is_intra[i]) {
1452 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1453 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1454 intrapred = 1;
1455 break;
1456 }
1457 }
1458 if (intrapred)
1459 s->ac_pred = get_bits1(gb);
1460 else
1461 s->ac_pred = 0;
1462 }
1463 if (!v->ttmbf && coded_inter)
1464 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1465 for (i = 0; i < 6; i++) {
1466 dst_idx += i >> 2;
1467 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1468 s->mb_intra = is_intra[i];
1469 if (is_intra[i]) {
1470 /* check if prediction blocks A and C are available */
1471 v->a_avail = v->c_avail = 0;
1472 if (i == 2 || i == 3 || !s->first_slice_line)
1473 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1474 if (i == 1 || i == 3 || s->mb_x)
1475 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1476
1477 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1478 (i & 4) ? v->codingset2 : v->codingset);
1479 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1480 continue;
1481 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1482 if (v->rangeredfrm)
1483 for (j = 0; j < 64; j++)
1484 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1485 block_cbp |= 0xF << (i << 2);
1486 block_intra |= 1 << i;
1487 } else if (is_coded[i]) {
1488 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1489 first_block, s->dest[dst_idx] + off,
1490 (i & 4) ? s->uvlinesize : s->linesize,
1491 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1492 &block_tt);
1493 if (pat < 0)
1494 return pat;
1495 block_cbp |= pat << (i << 2);
1496 if (!v->ttmbf && ttmb < 8)
1497 ttmb = -1;
1498 first_block = 0;
1499 }
1500 }
1501 } else { // skipped MB
1502 s->mb_intra = 0;
1503 s->current_picture.qscale_table[mb_pos] = 0;
1504 for (i = 0; i < 6; i++) {
1505 v->mb_type[0][s->block_index[i]] = 0;
1506 s->dc_val[0][s->block_index[i]] = 0;
1507 }
1508 for (i = 0; i < 4; i++) {
1509 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1510 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1511 }
1512 ff_vc1_mc_4mv_chroma(v, 0);
1513 s->current_picture.qscale_table[mb_pos] = 0;
1514 }
1515 }
1516 end:
1517 if (v->overlap && v->pq >= 9)
1518 ff_vc1_p_overlap_filter(v);
1519 vc1_put_blocks_clamped(v, 1);
1520
1521 v->cbp[s->mb_x] = block_cbp;
1522 v->ttblk[s->mb_x] = block_tt;
1523 v->is_intra[s->mb_x] = block_intra;
1524
1525 return 0;
1526 }
1527
1528 /* Decode one macroblock in an interlaced frame p picture */
1529
vc1_decode_p_mb_intfr(VC1Context * v)1530 static int vc1_decode_p_mb_intfr(VC1Context *v)
1531 {
1532 MpegEncContext *s = &v->s;
1533 GetBitContext *gb = &s->gb;
1534 int i;
1535 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1536 int cbp = 0; /* cbp decoding stuff */
1537 int mqdiff, mquant; /* MB quantization */
1538 int ttmb = v->ttfrm; /* MB Transform type */
1539
1540 int mb_has_coeffs = 1; /* last_flag */
1541 int dmv_x, dmv_y; /* Differential MV components */
1542 int val; /* temp value */
1543 int first_block = 1;
1544 int dst_idx, off;
1545 int skipped, fourmv = 0, twomv = 0;
1546 int block_cbp = 0, pat, block_tt = 0;
1547 int idx_mbmode = 0, mvbp;
1548 int fieldtx;
1549
1550 mquant = v->pq; /* Lossy initialization */
1551
1552 if (v->skip_is_raw)
1553 skipped = get_bits1(gb);
1554 else
1555 skipped = v->s.mbskip_table[mb_pos];
1556 if (!skipped) {
1557 if (v->fourmvswitch)
1558 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1559 else
1560 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1561 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1562 /* store the motion vector type in a flag (useful later) */
1563 case MV_PMODE_INTFR_4MV:
1564 fourmv = 1;
1565 v->blk_mv_type[s->block_index[0]] = 0;
1566 v->blk_mv_type[s->block_index[1]] = 0;
1567 v->blk_mv_type[s->block_index[2]] = 0;
1568 v->blk_mv_type[s->block_index[3]] = 0;
1569 break;
1570 case MV_PMODE_INTFR_4MV_FIELD:
1571 fourmv = 1;
1572 v->blk_mv_type[s->block_index[0]] = 1;
1573 v->blk_mv_type[s->block_index[1]] = 1;
1574 v->blk_mv_type[s->block_index[2]] = 1;
1575 v->blk_mv_type[s->block_index[3]] = 1;
1576 break;
1577 case MV_PMODE_INTFR_2MV_FIELD:
1578 twomv = 1;
1579 v->blk_mv_type[s->block_index[0]] = 1;
1580 v->blk_mv_type[s->block_index[1]] = 1;
1581 v->blk_mv_type[s->block_index[2]] = 1;
1582 v->blk_mv_type[s->block_index[3]] = 1;
1583 break;
1584 case MV_PMODE_INTFR_1MV:
1585 v->blk_mv_type[s->block_index[0]] = 0;
1586 v->blk_mv_type[s->block_index[1]] = 0;
1587 v->blk_mv_type[s->block_index[2]] = 0;
1588 v->blk_mv_type[s->block_index[3]] = 0;
1589 break;
1590 }
1591 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1592 for (i = 0; i < 4; i++) {
1593 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1594 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1595 }
1596 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1597 s->mb_intra = 1;
1598 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1599 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1600 mb_has_coeffs = get_bits1(gb);
1601 if (mb_has_coeffs)
1602 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1603 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1604 GET_MQUANT();
1605 s->current_picture.qscale_table[mb_pos] = mquant;
1606 /* Set DC scale - y and c use the same (not sure if necessary here) */
1607 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1608 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1609 dst_idx = 0;
1610 for (i = 0; i < 6; i++) {
1611 v->a_avail = v->c_avail = 0;
1612 v->mb_type[0][s->block_index[i]] = 1;
1613 s->dc_val[0][s->block_index[i]] = 0;
1614 dst_idx += i >> 2;
1615 val = ((cbp >> (5 - i)) & 1);
1616 if (i == 2 || i == 3 || !s->first_slice_line)
1617 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1618 if (i == 1 || i == 3 || s->mb_x)
1619 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1620
1621 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1622 (i & 4) ? v->codingset2 : v->codingset);
1623 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1624 continue;
1625 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1626 if (i < 4)
1627 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1628 else
1629 off = 0;
1630 block_cbp |= 0xf << (i << 2);
1631 }
1632
1633 } else { // inter MB
1634 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1635 if (mb_has_coeffs)
1636 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1637 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1638 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1639 } else {
1640 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1641 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1642 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1643 }
1644 }
1645 s->mb_intra = v->is_intra[s->mb_x] = 0;
1646 for (i = 0; i < 6; i++)
1647 v->mb_type[0][s->block_index[i]] = 0;
1648 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1649 /* for all motion vector read MVDATA and motion compensate each block */
1650 dst_idx = 0;
1651 if (fourmv) {
1652 mvbp = v->fourmvbp;
1653 for (i = 0; i < 4; i++) {
1654 dmv_x = dmv_y = 0;
1655 if (mvbp & (8 >> i))
1656 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1657 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1658 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1659 }
1660 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1661 } else if (twomv) {
1662 mvbp = v->twomvbp;
1663 dmv_x = dmv_y = 0;
1664 if (mvbp & 2) {
1665 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1666 }
1667 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1668 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1669 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1670 dmv_x = dmv_y = 0;
1671 if (mvbp & 1) {
1672 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1673 }
1674 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1675 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1676 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1677 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1678 } else {
1679 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1680 dmv_x = dmv_y = 0;
1681 if (mvbp) {
1682 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1683 }
1684 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1685 ff_vc1_mc_1mv(v, 0);
1686 }
1687 if (cbp)
1688 GET_MQUANT(); // p. 227
1689 s->current_picture.qscale_table[mb_pos] = mquant;
1690 if (!v->ttmbf && cbp)
1691 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1692 for (i = 0; i < 6; i++) {
1693 s->dc_val[0][s->block_index[i]] = 0;
1694 dst_idx += i >> 2;
1695 val = ((cbp >> (5 - i)) & 1);
1696 if (!fieldtx)
1697 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1698 else
1699 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1700 if (val) {
1701 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1702 first_block, s->dest[dst_idx] + off,
1703 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1704 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1705 if (pat < 0)
1706 return pat;
1707 block_cbp |= pat << (i << 2);
1708 if (!v->ttmbf && ttmb < 8)
1709 ttmb = -1;
1710 first_block = 0;
1711 }
1712 }
1713 }
1714 } else { // skipped
1715 s->mb_intra = v->is_intra[s->mb_x] = 0;
1716 for (i = 0; i < 6; i++) {
1717 v->mb_type[0][s->block_index[i]] = 0;
1718 s->dc_val[0][s->block_index[i]] = 0;
1719 }
1720 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1721 s->current_picture.qscale_table[mb_pos] = 0;
1722 v->blk_mv_type[s->block_index[0]] = 0;
1723 v->blk_mv_type[s->block_index[1]] = 0;
1724 v->blk_mv_type[s->block_index[2]] = 0;
1725 v->blk_mv_type[s->block_index[3]] = 0;
1726 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1727 ff_vc1_mc_1mv(v, 0);
1728 v->fieldtx_plane[mb_pos] = 0;
1729 }
1730 if (v->overlap && v->pq >= 9)
1731 ff_vc1_p_overlap_filter(v);
1732 vc1_put_blocks_clamped(v, 1);
1733
1734 v->cbp[s->mb_x] = block_cbp;
1735 v->ttblk[s->mb_x] = block_tt;
1736
1737 return 0;
1738 }
1739
vc1_decode_p_mb_intfi(VC1Context * v)1740 static int vc1_decode_p_mb_intfi(VC1Context *v)
1741 {
1742 MpegEncContext *s = &v->s;
1743 GetBitContext *gb = &s->gb;
1744 int i;
1745 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1746 int cbp = 0; /* cbp decoding stuff */
1747 int mqdiff, mquant; /* MB quantization */
1748 int ttmb = v->ttfrm; /* MB Transform type */
1749
1750 int mb_has_coeffs = 1; /* last_flag */
1751 int dmv_x, dmv_y; /* Differential MV components */
1752 int val; /* temp values */
1753 int first_block = 1;
1754 int dst_idx, off;
1755 int pred_flag = 0;
1756 int block_cbp = 0, pat, block_tt = 0;
1757 int idx_mbmode = 0;
1758
1759 mquant = v->pq; /* Lossy initialization */
1760
1761 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1762 if (idx_mbmode <= 1) { // intra MB
1763 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1764 s->mb_intra = 1;
1765 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1766 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1767 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1768 GET_MQUANT();
1769 s->current_picture.qscale_table[mb_pos] = mquant;
1770 /* Set DC scale - y and c use the same (not sure if necessary here) */
1771 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1772 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1773 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1774 mb_has_coeffs = idx_mbmode & 1;
1775 if (mb_has_coeffs)
1776 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1777 dst_idx = 0;
1778 for (i = 0; i < 6; i++) {
1779 v->a_avail = v->c_avail = 0;
1780 v->mb_type[0][s->block_index[i]] = 1;
1781 s->dc_val[0][s->block_index[i]] = 0;
1782 dst_idx += i >> 2;
1783 val = ((cbp >> (5 - i)) & 1);
1784 if (i == 2 || i == 3 || !s->first_slice_line)
1785 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1786 if (i == 1 || i == 3 || s->mb_x)
1787 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1788
1789 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1790 (i & 4) ? v->codingset2 : v->codingset);
1791 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1792 continue;
1793 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1794 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1795 block_cbp |= 0xf << (i << 2);
1796 }
1797 } else {
1798 s->mb_intra = v->is_intra[s->mb_x] = 0;
1799 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1800 for (i = 0; i < 6; i++)
1801 v->mb_type[0][s->block_index[i]] = 0;
1802 if (idx_mbmode <= 5) { // 1-MV
1803 dmv_x = dmv_y = pred_flag = 0;
1804 if (idx_mbmode & 1) {
1805 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1806 }
1807 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1808 ff_vc1_mc_1mv(v, 0);
1809 mb_has_coeffs = !(idx_mbmode & 2);
1810 } else { // 4-MV
1811 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1812 for (i = 0; i < 4; i++) {
1813 dmv_x = dmv_y = pred_flag = 0;
1814 if (v->fourmvbp & (8 >> i))
1815 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1816 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1817 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1818 }
1819 ff_vc1_mc_4mv_chroma(v, 0);
1820 mb_has_coeffs = idx_mbmode & 1;
1821 }
1822 if (mb_has_coeffs)
1823 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1824 if (cbp) {
1825 GET_MQUANT();
1826 }
1827 s->current_picture.qscale_table[mb_pos] = mquant;
1828 if (!v->ttmbf && cbp) {
1829 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1830 }
1831 dst_idx = 0;
1832 for (i = 0; i < 6; i++) {
1833 s->dc_val[0][s->block_index[i]] = 0;
1834 dst_idx += i >> 2;
1835 val = ((cbp >> (5 - i)) & 1);
1836 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1837 if (val) {
1838 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1839 first_block, s->dest[dst_idx] + off,
1840 (i & 4) ? s->uvlinesize : s->linesize,
1841 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1842 &block_tt);
1843 if (pat < 0)
1844 return pat;
1845 block_cbp |= pat << (i << 2);
1846 if (!v->ttmbf && ttmb < 8)
1847 ttmb = -1;
1848 first_block = 0;
1849 }
1850 }
1851 }
1852 if (v->overlap && v->pq >= 9)
1853 ff_vc1_p_overlap_filter(v);
1854 vc1_put_blocks_clamped(v, 1);
1855
1856 v->cbp[s->mb_x] = block_cbp;
1857 v->ttblk[s->mb_x] = block_tt;
1858
1859 return 0;
1860 }
1861
1862 /** Decode one B-frame MB (in Main profile)
1863 */
vc1_decode_b_mb(VC1Context * v)1864 static int vc1_decode_b_mb(VC1Context *v)
1865 {
1866 MpegEncContext *s = &v->s;
1867 GetBitContext *gb = &s->gb;
1868 int i, j;
1869 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1870 int cbp = 0; /* cbp decoding stuff */
1871 int mqdiff, mquant; /* MB quantization */
1872 int ttmb = v->ttfrm; /* MB Transform type */
1873 int mb_has_coeffs = 0; /* last_flag */
1874 int index, index1; /* LUT indexes */
1875 int val, sign; /* temp values */
1876 int first_block = 1;
1877 int dst_idx, off;
1878 int skipped, direct;
1879 int dmv_x[2], dmv_y[2];
1880 int bmvtype = BMV_TYPE_BACKWARD;
1881
1882 mquant = v->pq; /* lossy initialization */
1883 s->mb_intra = 0;
1884
1885 if (v->dmb_is_raw)
1886 direct = get_bits1(gb);
1887 else
1888 direct = v->direct_mb_plane[mb_pos];
1889 if (v->skip_is_raw)
1890 skipped = get_bits1(gb);
1891 else
1892 skipped = v->s.mbskip_table[mb_pos];
1893
1894 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1895 for (i = 0; i < 6; i++) {
1896 v->mb_type[0][s->block_index[i]] = 0;
1897 s->dc_val[0][s->block_index[i]] = 0;
1898 }
1899 s->current_picture.qscale_table[mb_pos] = 0;
1900
1901 if (!direct) {
1902 if (!skipped) {
1903 GET_MVDATA(dmv_x[0], dmv_y[0]);
1904 dmv_x[1] = dmv_x[0];
1905 dmv_y[1] = dmv_y[0];
1906 }
1907 if (skipped || !s->mb_intra) {
1908 bmvtype = decode012(gb);
1909 switch (bmvtype) {
1910 case 0:
1911 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1912 break;
1913 case 1:
1914 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1915 break;
1916 case 2:
1917 bmvtype = BMV_TYPE_INTERPOLATED;
1918 dmv_x[0] = dmv_y[0] = 0;
1919 }
1920 }
1921 }
1922 for (i = 0; i < 6; i++)
1923 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1924
1925 if (skipped) {
1926 if (direct)
1927 bmvtype = BMV_TYPE_INTERPOLATED;
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 return 0;
1931 }
1932 if (direct) {
1933 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1934 GET_MQUANT();
1935 s->mb_intra = 0;
1936 s->current_picture.qscale_table[mb_pos] = mquant;
1937 if (!v->ttmbf)
1938 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1939 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1940 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1941 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1942 } else {
1943 if (!mb_has_coeffs && !s->mb_intra) {
1944 /* no coded blocks - effectively skipped */
1945 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1946 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1947 return 0;
1948 }
1949 if (s->mb_intra && !mb_has_coeffs) {
1950 GET_MQUANT();
1951 s->current_picture.qscale_table[mb_pos] = mquant;
1952 s->ac_pred = get_bits1(gb);
1953 cbp = 0;
1954 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1955 } else {
1956 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1957 GET_MVDATA(dmv_x[0], dmv_y[0]);
1958 if (!mb_has_coeffs) {
1959 /* interpolated skipped block */
1960 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1961 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1962 return 0;
1963 }
1964 }
1965 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1966 if (!s->mb_intra) {
1967 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1968 }
1969 if (s->mb_intra)
1970 s->ac_pred = get_bits1(gb);
1971 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1972 GET_MQUANT();
1973 s->current_picture.qscale_table[mb_pos] = mquant;
1974 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1975 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1976 }
1977 }
1978 dst_idx = 0;
1979 for (i = 0; i < 6; i++) {
1980 s->dc_val[0][s->block_index[i]] = 0;
1981 dst_idx += i >> 2;
1982 val = ((cbp >> (5 - i)) & 1);
1983 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1984 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1985 if (s->mb_intra) {
1986 /* check if prediction blocks A and C are available */
1987 v->a_avail = v->c_avail = 0;
1988 if (i == 2 || i == 3 || !s->first_slice_line)
1989 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1990 if (i == 1 || i == 3 || s->mb_x)
1991 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1992
1993 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1994 (i & 4) ? v->codingset2 : v->codingset);
1995 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1996 continue;
1997 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1998 if (v->rangeredfrm)
1999 for (j = 0; j < 64; j++)
2000 s->block[i][j] *= 2;
2001 s->idsp.put_signed_pixels_clamped(s->block[i],
2002 s->dest[dst_idx] + off,
2003 i & 4 ? s->uvlinesize
2004 : s->linesize);
2005 } else if (val) {
2006 int pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2007 first_block, s->dest[dst_idx] + off,
2008 (i & 4) ? s->uvlinesize : s->linesize,
2009 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2010 if (pat < 0)
2011 return pat;
2012 if (!v->ttmbf && ttmb < 8)
2013 ttmb = -1;
2014 first_block = 0;
2015 }
2016 }
2017 return 0;
2018 }
2019
2020 /** Decode one B-frame MB (in interlaced field B picture)
2021 */
vc1_decode_b_mb_intfi(VC1Context * v)2022 static int vc1_decode_b_mb_intfi(VC1Context *v)
2023 {
2024 MpegEncContext *s = &v->s;
2025 GetBitContext *gb = &s->gb;
2026 int i, j;
2027 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2028 int cbp = 0; /* cbp decoding stuff */
2029 int mqdiff, mquant; /* MB quantization */
2030 int ttmb = v->ttfrm; /* MB Transform type */
2031 int mb_has_coeffs = 0; /* last_flag */
2032 int val; /* temp value */
2033 int first_block = 1;
2034 int dst_idx, off;
2035 int fwd;
2036 int dmv_x[2], dmv_y[2], pred_flag[2];
2037 int bmvtype = BMV_TYPE_BACKWARD;
2038 int block_cbp = 0, pat, block_tt = 0;
2039 int idx_mbmode;
2040
2041 mquant = v->pq; /* Lossy initialization */
2042 s->mb_intra = 0;
2043
2044 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2045 if (idx_mbmode <= 1) { // intra MB
2046 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2047 s->mb_intra = 1;
2048 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2049 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2050 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2051 GET_MQUANT();
2052 s->current_picture.qscale_table[mb_pos] = mquant;
2053 /* Set DC scale - y and c use the same (not sure if necessary here) */
2054 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2055 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2056 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2057 mb_has_coeffs = idx_mbmode & 1;
2058 if (mb_has_coeffs)
2059 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2060 dst_idx = 0;
2061 for (i = 0; i < 6; i++) {
2062 v->a_avail = v->c_avail = 0;
2063 v->mb_type[0][s->block_index[i]] = 1;
2064 s->dc_val[0][s->block_index[i]] = 0;
2065 dst_idx += i >> 2;
2066 val = ((cbp >> (5 - i)) & 1);
2067 if (i == 2 || i == 3 || !s->first_slice_line)
2068 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2069 if (i == 1 || i == 3 || s->mb_x)
2070 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2071
2072 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2073 (i & 4) ? v->codingset2 : v->codingset);
2074 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2075 continue;
2076 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2077 if (v->rangeredfrm)
2078 for (j = 0; j < 64; j++)
2079 s->block[i][j] <<= 1;
2080 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2081 s->idsp.put_signed_pixels_clamped(s->block[i],
2082 s->dest[dst_idx] + off,
2083 (i & 4) ? s->uvlinesize
2084 : s->linesize);
2085 }
2086 } else {
2087 s->mb_intra = v->is_intra[s->mb_x] = 0;
2088 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2089 for (i = 0; i < 6; i++)
2090 v->mb_type[0][s->block_index[i]] = 0;
2091 if (v->fmb_is_raw)
2092 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2093 else
2094 fwd = v->forward_mb_plane[mb_pos];
2095 if (idx_mbmode <= 5) { // 1-MV
2096 int interpmvp = 0;
2097 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2098 pred_flag[0] = pred_flag[1] = 0;
2099 if (fwd)
2100 bmvtype = BMV_TYPE_FORWARD;
2101 else {
2102 bmvtype = decode012(gb);
2103 switch (bmvtype) {
2104 case 0:
2105 bmvtype = BMV_TYPE_BACKWARD;
2106 break;
2107 case 1:
2108 bmvtype = BMV_TYPE_DIRECT;
2109 break;
2110 case 2:
2111 bmvtype = BMV_TYPE_INTERPOLATED;
2112 interpmvp = get_bits1(gb);
2113 }
2114 }
2115 v->bmvtype = bmvtype;
2116 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2117 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2118 }
2119 if (interpmvp) {
2120 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2121 }
2122 if (bmvtype == BMV_TYPE_DIRECT) {
2123 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2124 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2125 if (!s->next_picture_ptr->field_picture) {
2126 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2127 return AVERROR_INVALIDDATA;
2128 }
2129 }
2130 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2131 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2132 mb_has_coeffs = !(idx_mbmode & 2);
2133 } else { // 4-MV
2134 if (fwd)
2135 bmvtype = BMV_TYPE_FORWARD;
2136 v->bmvtype = bmvtype;
2137 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2138 for (i = 0; i < 4; i++) {
2139 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2140 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2141 if (v->fourmvbp & (8 >> i)) {
2142 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2143 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2144 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2145 }
2146 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2147 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2148 }
2149 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2150 mb_has_coeffs = idx_mbmode & 1;
2151 }
2152 if (mb_has_coeffs)
2153 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2154 if (cbp) {
2155 GET_MQUANT();
2156 }
2157 s->current_picture.qscale_table[mb_pos] = mquant;
2158 if (!v->ttmbf && cbp) {
2159 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2160 }
2161 dst_idx = 0;
2162 for (i = 0; i < 6; i++) {
2163 s->dc_val[0][s->block_index[i]] = 0;
2164 dst_idx += i >> 2;
2165 val = ((cbp >> (5 - i)) & 1);
2166 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2167 if (val) {
2168 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2169 first_block, s->dest[dst_idx] + off,
2170 (i & 4) ? s->uvlinesize : s->linesize,
2171 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2172 if (pat < 0)
2173 return pat;
2174 block_cbp |= pat << (i << 2);
2175 if (!v->ttmbf && ttmb < 8)
2176 ttmb = -1;
2177 first_block = 0;
2178 }
2179 }
2180 }
2181 v->cbp[s->mb_x] = block_cbp;
2182 v->ttblk[s->mb_x] = block_tt;
2183
2184 return 0;
2185 }
2186
2187 /** Decode one B-frame MB (in interlaced frame B picture)
2188 */
vc1_decode_b_mb_intfr(VC1Context * v)2189 static int vc1_decode_b_mb_intfr(VC1Context *v)
2190 {
2191 MpegEncContext *s = &v->s;
2192 GetBitContext *gb = &s->gb;
2193 int i, j;
2194 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2195 int cbp = 0; /* cbp decoding stuff */
2196 int mqdiff, mquant; /* MB quantization */
2197 int ttmb = v->ttfrm; /* MB Transform type */
2198 int mvsw = 0; /* motion vector switch */
2199 int mb_has_coeffs = 1; /* last_flag */
2200 int dmv_x, dmv_y; /* Differential MV components */
2201 int val; /* temp value */
2202 int first_block = 1;
2203 int dst_idx, off;
2204 int skipped, direct, twomv = 0;
2205 int block_cbp = 0, pat, block_tt = 0;
2206 int idx_mbmode = 0, mvbp;
2207 int stride_y, fieldtx;
2208 int bmvtype = BMV_TYPE_BACKWARD;
2209 int dir, dir2;
2210
2211 mquant = v->pq; /* Lossy initialization */
2212 s->mb_intra = 0;
2213 if (v->skip_is_raw)
2214 skipped = get_bits1(gb);
2215 else
2216 skipped = v->s.mbskip_table[mb_pos];
2217
2218 if (!skipped) {
2219 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2220 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2221 twomv = 1;
2222 v->blk_mv_type[s->block_index[0]] = 1;
2223 v->blk_mv_type[s->block_index[1]] = 1;
2224 v->blk_mv_type[s->block_index[2]] = 1;
2225 v->blk_mv_type[s->block_index[3]] = 1;
2226 } else {
2227 v->blk_mv_type[s->block_index[0]] = 0;
2228 v->blk_mv_type[s->block_index[1]] = 0;
2229 v->blk_mv_type[s->block_index[2]] = 0;
2230 v->blk_mv_type[s->block_index[3]] = 0;
2231 }
2232 }
2233
2234 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2235 for (i = 0; i < 4; i++) {
2236 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2237 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2238 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2239 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2240 }
2241 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2242 s->mb_intra = 1;
2243 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2244 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2245 mb_has_coeffs = get_bits1(gb);
2246 if (mb_has_coeffs)
2247 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2248 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2249 GET_MQUANT();
2250 s->current_picture.qscale_table[mb_pos] = mquant;
2251 /* Set DC scale - y and c use the same (not sure if necessary here) */
2252 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2253 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2254 dst_idx = 0;
2255 for (i = 0; i < 6; i++) {
2256 v->a_avail = v->c_avail = 0;
2257 v->mb_type[0][s->block_index[i]] = 1;
2258 s->dc_val[0][s->block_index[i]] = 0;
2259 dst_idx += i >> 2;
2260 val = ((cbp >> (5 - i)) & 1);
2261 if (i == 2 || i == 3 || !s->first_slice_line)
2262 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2263 if (i == 1 || i == 3 || s->mb_x)
2264 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2265
2266 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2267 (i & 4) ? v->codingset2 : v->codingset);
2268 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2269 continue;
2270 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2271 if (i < 4) {
2272 stride_y = s->linesize << fieldtx;
2273 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2274 } else {
2275 stride_y = s->uvlinesize;
2276 off = 0;
2277 }
2278 s->idsp.put_signed_pixels_clamped(s->block[i],
2279 s->dest[dst_idx] + off,
2280 stride_y);
2281 }
2282 } else {
2283 s->mb_intra = v->is_intra[s->mb_x] = 0;
2284
2285 if (v->dmb_is_raw)
2286 direct = get_bits1(gb);
2287 else
2288 direct = v->direct_mb_plane[mb_pos];
2289
2290 if (direct) {
2291 if (s->next_picture_ptr->field_picture)
2292 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2293 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);
2294 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);
2295 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);
2296 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);
2297
2298 if (twomv) {
2299 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);
2300 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);
2301 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);
2302 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);
2303
2304 for (i = 1; i < 4; i += 2) {
2305 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2306 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2307 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2308 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2309 }
2310 } else {
2311 for (i = 1; i < 4; i++) {
2312 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2313 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2314 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2315 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2316 }
2317 }
2318 }
2319
2320 if (!direct) {
2321 if (skipped || !s->mb_intra) {
2322 bmvtype = decode012(gb);
2323 switch (bmvtype) {
2324 case 0:
2325 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2326 break;
2327 case 1:
2328 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2329 break;
2330 case 2:
2331 bmvtype = BMV_TYPE_INTERPOLATED;
2332 }
2333 }
2334
2335 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2336 mvsw = get_bits1(gb);
2337 }
2338
2339 if (!skipped) { // inter MB
2340 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2341 if (mb_has_coeffs)
2342 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2343 if (!direct) {
2344 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2345 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2346 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2347 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2348 }
2349 }
2350
2351 for (i = 0; i < 6; i++)
2352 v->mb_type[0][s->block_index[i]] = 0;
2353 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2354 /* for all motion vector read MVDATA and motion compensate each block */
2355 dst_idx = 0;
2356 if (direct) {
2357 if (twomv) {
2358 for (i = 0; i < 4; i++) {
2359 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2360 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2361 }
2362 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2363 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2364 } else {
2365 ff_vc1_mc_1mv(v, 0);
2366 ff_vc1_interp_mc(v);
2367 }
2368 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2369 mvbp = v->fourmvbp;
2370 for (i = 0; i < 4; i++) {
2371 dir = i==1 || i==3;
2372 dmv_x = dmv_y = 0;
2373 val = ((mvbp >> (3 - i)) & 1);
2374 if (val)
2375 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2376 j = i > 1 ? 2 : 0;
2377 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2378 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2379 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2380 }
2381
2382 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2383 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2384 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2385 mvbp = v->twomvbp;
2386 dmv_x = dmv_y = 0;
2387 if (mvbp & 2)
2388 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2389
2390 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2391 ff_vc1_mc_1mv(v, 0);
2392
2393 dmv_x = dmv_y = 0;
2394 if (mvbp & 1)
2395 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2396
2397 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2398 ff_vc1_interp_mc(v);
2399 } else if (twomv) {
2400 dir = bmvtype == BMV_TYPE_BACKWARD;
2401 dir2 = dir;
2402 if (mvsw)
2403 dir2 = !dir;
2404 mvbp = v->twomvbp;
2405 dmv_x = dmv_y = 0;
2406 if (mvbp & 2)
2407 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2408 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2409
2410 dmv_x = dmv_y = 0;
2411 if (mvbp & 1)
2412 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2413 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2414
2415 if (mvsw) {
2416 for (i = 0; i < 2; i++) {
2417 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];
2418 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];
2419 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];
2420 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];
2421 }
2422 } else {
2423 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2424 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2425 }
2426
2427 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2428 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2429 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2430 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2431 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2432 } else {
2433 dir = bmvtype == BMV_TYPE_BACKWARD;
2434
2435 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2436 dmv_x = dmv_y = 0;
2437 if (mvbp)
2438 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2439
2440 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2441 v->blk_mv_type[s->block_index[0]] = 1;
2442 v->blk_mv_type[s->block_index[1]] = 1;
2443 v->blk_mv_type[s->block_index[2]] = 1;
2444 v->blk_mv_type[s->block_index[3]] = 1;
2445 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2446 for (i = 0; i < 2; i++) {
2447 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];
2448 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];
2449 }
2450 ff_vc1_mc_1mv(v, dir);
2451 }
2452
2453 if (cbp)
2454 GET_MQUANT(); // p. 227
2455 s->current_picture.qscale_table[mb_pos] = mquant;
2456 if (!v->ttmbf && cbp)
2457 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2458 for (i = 0; i < 6; i++) {
2459 s->dc_val[0][s->block_index[i]] = 0;
2460 dst_idx += i >> 2;
2461 val = ((cbp >> (5 - i)) & 1);
2462 if (!fieldtx)
2463 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2464 else
2465 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2466 if (val) {
2467 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2468 first_block, s->dest[dst_idx] + off,
2469 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2470 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2471 if (pat < 0)
2472 return pat;
2473 block_cbp |= pat << (i << 2);
2474 if (!v->ttmbf && ttmb < 8)
2475 ttmb = -1;
2476 first_block = 0;
2477 }
2478 }
2479
2480 } else { // skipped
2481 dir = 0;
2482 for (i = 0; i < 6; i++) {
2483 v->mb_type[0][s->block_index[i]] = 0;
2484 s->dc_val[0][s->block_index[i]] = 0;
2485 }
2486 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2487 s->current_picture.qscale_table[mb_pos] = 0;
2488 v->blk_mv_type[s->block_index[0]] = 0;
2489 v->blk_mv_type[s->block_index[1]] = 0;
2490 v->blk_mv_type[s->block_index[2]] = 0;
2491 v->blk_mv_type[s->block_index[3]] = 0;
2492
2493 if (!direct) {
2494 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2495 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2496 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2497 } else {
2498 dir = bmvtype == BMV_TYPE_BACKWARD;
2499 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2500 if (mvsw) {
2501 int dir2 = dir;
2502 if (mvsw)
2503 dir2 = !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 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];
2508 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];
2509 }
2510 } else {
2511 v->blk_mv_type[s->block_index[0]] = 1;
2512 v->blk_mv_type[s->block_index[1]] = 1;
2513 v->blk_mv_type[s->block_index[2]] = 1;
2514 v->blk_mv_type[s->block_index[3]] = 1;
2515 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2516 for (i = 0; i < 2; i++) {
2517 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];
2518 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];
2519 }
2520 }
2521 }
2522 }
2523
2524 ff_vc1_mc_1mv(v, dir);
2525 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2526 ff_vc1_interp_mc(v);
2527 }
2528 v->fieldtx_plane[mb_pos] = 0;
2529 }
2530 }
2531 v->cbp[s->mb_x] = block_cbp;
2532 v->ttblk[s->mb_x] = block_tt;
2533
2534 return 0;
2535 }
2536
2537 /** Decode blocks of I-frame
2538 */
vc1_decode_i_blocks(VC1Context * v)2539 static void vc1_decode_i_blocks(VC1Context *v)
2540 {
2541 int k, j;
2542 MpegEncContext *s = &v->s;
2543 int cbp, val;
2544 uint8_t *coded_val;
2545 int mb_pos;
2546
2547 /* select coding mode used for VLC tables selection */
2548 switch (v->y_ac_table_index) {
2549 case 0:
2550 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2551 break;
2552 case 1:
2553 v->codingset = CS_HIGH_MOT_INTRA;
2554 break;
2555 case 2:
2556 v->codingset = CS_MID_RATE_INTRA;
2557 break;
2558 }
2559
2560 switch (v->c_ac_table_index) {
2561 case 0:
2562 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2563 break;
2564 case 1:
2565 v->codingset2 = CS_HIGH_MOT_INTER;
2566 break;
2567 case 2:
2568 v->codingset2 = CS_MID_RATE_INTER;
2569 break;
2570 }
2571
2572 /* Set DC scale - y and c use the same */
2573 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2574 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2575
2576 //do frame decode
2577 s->mb_x = s->mb_y = 0;
2578 s->mb_intra = 1;
2579 s->first_slice_line = 1;
2580 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2581 s->mb_x = 0;
2582 init_block_index(v);
2583 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2584 ff_update_block_index(s);
2585 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2586 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2587 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2588 s->current_picture.qscale_table[mb_pos] = v->pq;
2589 for (int i = 0; i < 4; i++) {
2590 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2591 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2592 }
2593
2594 // do actual MB decoding and displaying
2595 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2596 v->s.ac_pred = get_bits1(&v->s.gb);
2597
2598 for (k = 0; k < 6; k++) {
2599 v->mb_type[0][s->block_index[k]] = 1;
2600
2601 val = ((cbp >> (5 - k)) & 1);
2602
2603 if (k < 4) {
2604 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2605 val = val ^ pred;
2606 *coded_val = val;
2607 }
2608 cbp |= val << (5 - k);
2609
2610 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2611
2612 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2613 continue;
2614 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2615 }
2616
2617 if (v->overlap && v->pq >= 9) {
2618 ff_vc1_i_overlap_filter(v);
2619 if (v->rangeredfrm)
2620 for (k = 0; k < 6; k++)
2621 for (j = 0; j < 64; j++)
2622 v->block[v->cur_blk_idx][block_map[k]][j] *= 2;
2623 vc1_put_blocks_clamped(v, 1);
2624 } else {
2625 if (v->rangeredfrm)
2626 for (k = 0; k < 6; k++)
2627 for (j = 0; j < 64; j++)
2628 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2;
2629 vc1_put_blocks_clamped(v, 0);
2630 }
2631
2632 if (v->s.loop_filter)
2633 ff_vc1_i_loop_filter(v);
2634
2635 if (get_bits_left(&s->gb) < 0) {
2636 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2637 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2638 get_bits_count(&s->gb), s->gb.size_in_bits);
2639 return;
2640 }
2641
2642 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2643 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2644 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2645 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2646 }
2647 if (!v->s.loop_filter)
2648 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2649 else if (s->mb_y)
2650 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2651
2652 s->first_slice_line = 0;
2653 }
2654 if (v->s.loop_filter)
2655 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2656
2657 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2658 * profile, these only differ are when decoding MSS2 rectangles. */
2659 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2660 }
2661
2662 /** Decode blocks of I-frame for advanced profile
2663 */
vc1_decode_i_blocks_adv(VC1Context * v)2664 static int vc1_decode_i_blocks_adv(VC1Context *v)
2665 {
2666 int k;
2667 MpegEncContext *s = &v->s;
2668 int cbp, val;
2669 uint8_t *coded_val;
2670 int mb_pos;
2671 int mquant;
2672 int mqdiff;
2673 GetBitContext *gb = &s->gb;
2674
2675 if (get_bits_left(gb) <= 1)
2676 return AVERROR_INVALIDDATA;
2677
2678 /* select coding mode used for VLC tables selection */
2679 switch (v->y_ac_table_index) {
2680 case 0:
2681 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2682 break;
2683 case 1:
2684 v->codingset = CS_HIGH_MOT_INTRA;
2685 break;
2686 case 2:
2687 v->codingset = CS_MID_RATE_INTRA;
2688 break;
2689 }
2690
2691 switch (v->c_ac_table_index) {
2692 case 0:
2693 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2694 break;
2695 case 1:
2696 v->codingset2 = CS_HIGH_MOT_INTER;
2697 break;
2698 case 2:
2699 v->codingset2 = CS_MID_RATE_INTER;
2700 break;
2701 }
2702
2703 // do frame decode
2704 s->mb_x = s->mb_y = 0;
2705 s->mb_intra = 1;
2706 s->first_slice_line = 1;
2707 s->mb_y = s->start_mb_y;
2708 if (s->start_mb_y) {
2709 s->mb_x = 0;
2710 init_block_index(v);
2711 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2712 (1 + s->b8_stride) * sizeof(*s->coded_block));
2713 }
2714 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2715 s->mb_x = 0;
2716 init_block_index(v);
2717 for (;s->mb_x < s->mb_width; s->mb_x++) {
2718 mquant = v->pq;
2719 ff_update_block_index(s);
2720 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2721 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2722 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2723 for (int i = 0; i < 4; i++) {
2724 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2725 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2726 }
2727
2728 // do actual MB decoding and displaying
2729 if (v->fieldtx_is_raw)
2730 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2731 if (get_bits_left(&v->s.gb) <= 1) {
2732 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2733 return 0;
2734 }
2735
2736 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2737 if (v->acpred_is_raw)
2738 v->s.ac_pred = get_bits1(&v->s.gb);
2739 else
2740 v->s.ac_pred = v->acpred_plane[mb_pos];
2741
2742 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2743 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2744
2745 GET_MQUANT();
2746
2747 s->current_picture.qscale_table[mb_pos] = mquant;
2748 /* Set DC scale - y and c use the same */
2749 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2750 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2751
2752 for (k = 0; k < 6; k++) {
2753 v->mb_type[0][s->block_index[k]] = 1;
2754
2755 val = ((cbp >> (5 - k)) & 1);
2756
2757 if (k < 4) {
2758 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2759 val = val ^ pred;
2760 *coded_val = val;
2761 }
2762 cbp |= val << (5 - k);
2763
2764 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2765 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2766
2767 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2768 (k < 4) ? v->codingset : v->codingset2, mquant);
2769
2770 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2771 continue;
2772 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2773 }
2774
2775 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2776 ff_vc1_i_overlap_filter(v);
2777 vc1_put_blocks_clamped(v, 1);
2778 if (v->s.loop_filter)
2779 ff_vc1_i_loop_filter(v);
2780
2781 if (get_bits_left(&s->gb) < 0) {
2782 // TODO: may need modification to handle slice coding
2783 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2784 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2785 get_bits_count(&s->gb), s->gb.size_in_bits);
2786 return 0;
2787 }
2788 inc_blk_idx(v->topleft_blk_idx);
2789 inc_blk_idx(v->top_blk_idx);
2790 inc_blk_idx(v->left_blk_idx);
2791 inc_blk_idx(v->cur_blk_idx);
2792 }
2793 if (!v->s.loop_filter)
2794 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2795 else if (s->mb_y)
2796 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2797 s->first_slice_line = 0;
2798 }
2799
2800 if (v->s.loop_filter)
2801 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2802 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2803 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2804 return 0;
2805 }
2806
vc1_decode_p_blocks(VC1Context * v)2807 static void vc1_decode_p_blocks(VC1Context *v)
2808 {
2809 MpegEncContext *s = &v->s;
2810 int apply_loop_filter;
2811
2812 /* select coding mode used for VLC tables selection */
2813 switch (v->c_ac_table_index) {
2814 case 0:
2815 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2816 break;
2817 case 1:
2818 v->codingset = CS_HIGH_MOT_INTRA;
2819 break;
2820 case 2:
2821 v->codingset = CS_MID_RATE_INTRA;
2822 break;
2823 }
2824
2825 switch (v->c_ac_table_index) {
2826 case 0:
2827 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2828 break;
2829 case 1:
2830 v->codingset2 = CS_HIGH_MOT_INTER;
2831 break;
2832 case 2:
2833 v->codingset2 = CS_MID_RATE_INTER;
2834 break;
2835 }
2836
2837 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2838 s->first_slice_line = 1;
2839 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2840 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2841 s->mb_x = 0;
2842 init_block_index(v);
2843 for (; s->mb_x < s->mb_width; s->mb_x++) {
2844 ff_update_block_index(s);
2845
2846 if (v->fcm == ILACE_FIELD || (v->fcm == PROGRESSIVE && v->mv_type_is_raw) || v->skip_is_raw)
2847 if (get_bits_left(&v->s.gb) <= 1) {
2848 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2849 return;
2850 }
2851
2852 if (v->fcm == ILACE_FIELD) {
2853 vc1_decode_p_mb_intfi(v);
2854 if (apply_loop_filter)
2855 ff_vc1_p_loop_filter(v);
2856 } else if (v->fcm == ILACE_FRAME) {
2857 vc1_decode_p_mb_intfr(v);
2858 if (apply_loop_filter)
2859 ff_vc1_p_intfr_loop_filter(v);
2860 } else {
2861 vc1_decode_p_mb(v);
2862 if (apply_loop_filter)
2863 ff_vc1_p_loop_filter(v);
2864 }
2865 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2866 // TODO: may need modification to handle slice coding
2867 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2868 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2869 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2870 return;
2871 }
2872 inc_blk_idx(v->topleft_blk_idx);
2873 inc_blk_idx(v->top_blk_idx);
2874 inc_blk_idx(v->left_blk_idx);
2875 inc_blk_idx(v->cur_blk_idx);
2876 }
2877 memmove(v->cbp_base,
2878 v->cbp - s->mb_stride,
2879 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2880 memmove(v->ttblk_base,
2881 v->ttblk - s->mb_stride,
2882 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2883 memmove(v->is_intra_base,
2884 v->is_intra - s->mb_stride,
2885 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2886 memmove(v->luma_mv_base,
2887 v->luma_mv - s->mb_stride,
2888 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2889 if (s->mb_y != s->start_mb_y)
2890 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2891 s->first_slice_line = 0;
2892 }
2893 if (s->end_mb_y >= s->start_mb_y)
2894 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2895 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2896 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2897 }
2898
vc1_decode_b_blocks(VC1Context * v)2899 static void vc1_decode_b_blocks(VC1Context *v)
2900 {
2901 MpegEncContext *s = &v->s;
2902
2903 /* select coding mode used for VLC tables selection */
2904 switch (v->c_ac_table_index) {
2905 case 0:
2906 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2907 break;
2908 case 1:
2909 v->codingset = CS_HIGH_MOT_INTRA;
2910 break;
2911 case 2:
2912 v->codingset = CS_MID_RATE_INTRA;
2913 break;
2914 }
2915
2916 switch (v->c_ac_table_index) {
2917 case 0:
2918 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2919 break;
2920 case 1:
2921 v->codingset2 = CS_HIGH_MOT_INTER;
2922 break;
2923 case 2:
2924 v->codingset2 = CS_MID_RATE_INTER;
2925 break;
2926 }
2927
2928 s->first_slice_line = 1;
2929 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2930 s->mb_x = 0;
2931 init_block_index(v);
2932 for (; s->mb_x < s->mb_width; s->mb_x++) {
2933 ff_update_block_index(s);
2934
2935 if (v->fcm == ILACE_FIELD || v->skip_is_raw || v->dmb_is_raw)
2936 if (get_bits_left(&v->s.gb) <= 1) {
2937 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2938 return;
2939 }
2940
2941 if (v->fcm == ILACE_FIELD) {
2942 vc1_decode_b_mb_intfi(v);
2943 if (v->s.loop_filter)
2944 ff_vc1_b_intfi_loop_filter(v);
2945 } else if (v->fcm == ILACE_FRAME) {
2946 vc1_decode_b_mb_intfr(v);
2947 if (v->s.loop_filter)
2948 ff_vc1_p_intfr_loop_filter(v);
2949 } else {
2950 vc1_decode_b_mb(v);
2951 if (v->s.loop_filter)
2952 ff_vc1_i_loop_filter(v);
2953 }
2954 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2955 // TODO: may need modification to handle slice coding
2956 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2957 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2958 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2959 return;
2960 }
2961 }
2962 memmove(v->cbp_base,
2963 v->cbp - s->mb_stride,
2964 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2965 memmove(v->ttblk_base,
2966 v->ttblk - s->mb_stride,
2967 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2968 memmove(v->is_intra_base,
2969 v->is_intra - s->mb_stride,
2970 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2971 if (!v->s.loop_filter)
2972 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2973 else if (s->mb_y)
2974 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2975 s->first_slice_line = 0;
2976 }
2977 if (v->s.loop_filter)
2978 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2979 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2980 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2981 }
2982
vc1_decode_skip_blocks(VC1Context * v)2983 static void vc1_decode_skip_blocks(VC1Context *v)
2984 {
2985 MpegEncContext *s = &v->s;
2986
2987 if (!v->s.last_picture.f->data[0])
2988 return;
2989
2990 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2991 s->first_slice_line = 1;
2992 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2993 s->mb_x = 0;
2994 init_block_index(v);
2995 ff_update_block_index(s);
2996 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2997 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2998 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2999 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
3000 s->first_slice_line = 0;
3001 }
3002 s->pict_type = AV_PICTURE_TYPE_P;
3003 }
3004
ff_vc1_decode_blocks(VC1Context * v)3005 void ff_vc1_decode_blocks(VC1Context *v)
3006 {
3007
3008 v->s.esc3_level_length = 0;
3009 if (v->x8_type) {
3010 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
3011 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
3012 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
3013 v->s.loop_filter, v->s.low_delay);
3014
3015 ff_er_add_slice(&v->s.er, 0, 0,
3016 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
3017 ER_MB_END);
3018 } else {
3019 v->cur_blk_idx = 0;
3020 v->left_blk_idx = -1;
3021 v->topleft_blk_idx = 1;
3022 v->top_blk_idx = 2;
3023 switch (v->s.pict_type) {
3024 case AV_PICTURE_TYPE_I:
3025 if (v->profile == PROFILE_ADVANCED)
3026 vc1_decode_i_blocks_adv(v);
3027 else
3028 vc1_decode_i_blocks(v);
3029 break;
3030 case AV_PICTURE_TYPE_P:
3031 if (v->p_frame_skipped)
3032 vc1_decode_skip_blocks(v);
3033 else
3034 vc1_decode_p_blocks(v);
3035 break;
3036 case AV_PICTURE_TYPE_B:
3037 if (v->bi_type) {
3038 if (v->profile == PROFILE_ADVANCED)
3039 vc1_decode_i_blocks_adv(v);
3040 else
3041 vc1_decode_i_blocks(v);
3042 } else
3043 vc1_decode_b_blocks(v);
3044 break;
3045 }
3046 }
3047 }
3048