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Update for 5.1.8
[ffmpeg.git] / libavcodec / vc1_block.c
1 /*
2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2011 Mashiat Sarker Shakkhar
4 * Copyright (c) 2006-2007 Konstantin Shishkov
5 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * VC-1 and WMV3 block decoding routines
27 */
28
29 #include "avcodec.h"
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "mpegvideodec.h"
33 #include "msmpeg4data.h"
34 #include "unary.h"
35 #include "vc1.h"
36 #include "vc1_pred.h"
37 #include "vc1acdata.h"
38 #include "vc1data.h"
39
40 #define MB_INTRA_VLC_BITS 9
41 #define DC_VLC_BITS 9
42
43 // offset tables for interlaced picture MVDATA decoding
44 static const uint8_t offset_table[2][9] = {
45 { 0, 1, 2, 4, 8, 16, 32, 64, 128 },
46 { 0, 1, 3, 7, 15, 31, 63, 127, 255 },
47 };
48
49 // mapping table for internal block representation
50 static const int block_map[6] = {0, 2, 1, 3, 4, 5};
51
52 /***********************************************************************/
53 /**
54 * @name VC-1 Bitplane decoding
55 * @see 8.7, p56
56 * @{
57 */
58
59
60 static inline void init_block_index(VC1Context *v)
61 {
62 MpegEncContext *s = &v->s;
63 ff_init_block_index(s);
64 if (v->field_mode && !(v->second_field ^ v->tff)) {
65 s->dest[0] += s->current_picture_ptr->f->linesize[0];
66 s->dest[1] += s->current_picture_ptr->f->linesize[1];
67 s->dest[2] += s->current_picture_ptr->f->linesize[2];
68 }
69 }
70
71 /** @} */ //Bitplane group
72
73 static void vc1_put_blocks_clamped(VC1Context *v, int put_signed)
74 {
75 MpegEncContext *s = &v->s;
76 uint8_t *dest;
77 int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
78 int fieldtx = 0;
79 int i;
80
81 /* The put pixels loop is one MB row and one MB column behind the decoding
82 * loop because we can only put pixels when overlap filtering is done. For
83 * interlaced frame pictures, however, the put pixels loop is only one
84 * column behind the decoding loop as interlaced frame pictures only need
85 * horizontal overlap filtering. */
86 if (!s->first_slice_line && v->fcm != ILACE_FRAME) {
87 if (s->mb_x) {
88 for (i = 0; i < block_count; i++) {
89 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i] - 1] :
90 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i] - 2]) {
91 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + ((i & 1) - 2) * 8;
92 if (put_signed)
93 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
94 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
95 i > 3 ? s->uvlinesize : s->linesize);
96 else
97 s->idsp.put_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
98 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
99 i > 3 ? s->uvlinesize : s->linesize);
100 }
101 }
102 }
103 if (s->mb_x == v->end_mb_x - 1) {
104 for (i = 0; i < block_count; i++) {
105 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i]] :
106 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i]]) {
107 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + (i & 1) * 8;
108 if (put_signed)
109 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
110 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
111 i > 3 ? s->uvlinesize : s->linesize);
112 else
113 s->idsp.put_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
114 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
115 i > 3 ? s->uvlinesize : s->linesize);
116 }
117 }
118 }
119 }
120 if (s->mb_y == s->end_mb_y - 1 || v->fcm == ILACE_FRAME) {
121 if (s->mb_x) {
122 if (v->fcm == ILACE_FRAME)
123 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x - 1];
124 for (i = 0; i < block_count; i++) {
125 if (i > 3 ? v->mb_type[0][s->block_index[i] - 1] :
126 v->mb_type[0][s->block_index[i] - 2]) {
127 if (fieldtx)
128 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + ((i & 1) - 2) * 8;
129 else
130 dest = s->dest[0] + (i & 2) * 4 * s->linesize + ((i & 1) - 2) * 8;
131 if (put_signed)
132 s->idsp.put_signed_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
133 i > 3 ? s->dest[i - 3] - 8 : dest,
134 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
135 else
136 s->idsp.put_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
137 i > 3 ? s->dest[i - 3] - 8 : dest,
138 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
139 }
140 }
141 }
142 if (s->mb_x == v->end_mb_x - 1) {
143 if (v->fcm == ILACE_FRAME)
144 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x];
145 for (i = 0; i < block_count; i++) {
146 if (v->mb_type[0][s->block_index[i]]) {
147 if (fieldtx)
148 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + (i & 1) * 8;
149 else
150 dest = s->dest[0] + (i & 2) * 4 * s->linesize + (i & 1) * 8;
151 if (put_signed)
152 s->idsp.put_signed_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
153 i > 3 ? s->dest[i - 3] : dest,
154 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
155 else
156 s->idsp.put_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
157 i > 3 ? s->dest[i - 3] : dest,
158 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
159 }
160 }
161 }
162 }
163 }
164
165 #define inc_blk_idx(idx) do { \
166 idx++; \
167 if (idx >= v->n_allocated_blks) \
168 idx = 0; \
169 } while (0)
170
171 /***********************************************************************/
172 /**
173 * @name VC-1 Block-level functions
174 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
175 * @{
176 */
177
178 /**
179 * @def GET_MQUANT
180 * @brief Get macroblock-level quantizer scale
181 */
182 #define GET_MQUANT() \
183 if (v->dquantfrm) { \
184 int edges = 0; \
185 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
186 if (v->dqbilevel) { \
187 mquant = (get_bits1(gb)) ? -v->altpq : v->pq; \
188 } else { \
189 mqdiff = get_bits(gb, 3); \
190 if (mqdiff != 7) \
191 mquant = -v->pq - mqdiff; \
192 else \
193 mquant = -get_bits(gb, 5); \
194 } \
195 } \
196 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
197 edges = 1 << v->dqsbedge; \
198 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
199 edges = (3 << v->dqsbedge) % 15; \
200 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
201 edges = 15; \
202 if ((edges&1) && !s->mb_x) \
203 mquant = -v->altpq; \
204 if ((edges&2) && !s->mb_y) \
205 mquant = -v->altpq; \
206 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
207 mquant = -v->altpq; \
208 if ((edges&8) && \
209 s->mb_y == ((s->mb_height >> v->field_mode) - 1)) \
210 mquant = -v->altpq; \
211 if (!mquant || mquant > 31 || mquant < -31) { \
212 av_log(v->s.avctx, AV_LOG_ERROR, \
213 "Overriding invalid mquant %d\n", mquant); \
214 mquant = 1; \
215 } \
216 }
217
218 /**
219 * @def GET_MVDATA(_dmv_x, _dmv_y)
220 * @brief Get MV differentials
221 * @see MVDATA decoding from 8.3.5.2, p(1)20
222 * @param _dmv_x Horizontal differential for decoded MV
223 * @param _dmv_y Vertical differential for decoded MV
224 */
225 #define GET_MVDATA(_dmv_x, _dmv_y) \
226 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
227 VC1_MV_DIFF_VLC_BITS, 2); \
228 if (index > 36) { \
229 mb_has_coeffs = 1; \
230 index -= 37; \
231 } else \
232 mb_has_coeffs = 0; \
233 s->mb_intra = 0; \
234 if (!index) { \
235 _dmv_x = _dmv_y = 0; \
236 } else if (index == 35) { \
237 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
238 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
239 } else if (index == 36) { \
240 _dmv_x = 0; \
241 _dmv_y = 0; \
242 s->mb_intra = 1; \
243 } else { \
244 index1 = index % 6; \
245 _dmv_x = offset_table[1][index1]; \
246 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
247 if (val > 0) { \
248 val = get_bits(gb, val); \
249 sign = 0 - (val & 1); \
250 _dmv_x = (sign ^ ((val >> 1) + _dmv_x)) - sign; \
251 } \
252 \
253 index1 = index / 6; \
254 _dmv_y = offset_table[1][index1]; \
255 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
256 if (val > 0) { \
257 val = get_bits(gb, val); \
258 sign = 0 - (val & 1); \
259 _dmv_y = (sign ^ ((val >> 1) + _dmv_y)) - sign; \
260 } \
261 }
262
263 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
264 int *dmv_y, int *pred_flag)
265 {
266 int index, index1;
267 int extend_x, extend_y;
268 GetBitContext *gb = &v->s.gb;
269 int bits, esc;
270 int val, sign;
271
272 if (v->numref) {
273 bits = VC1_2REF_MVDATA_VLC_BITS;
274 esc = 125;
275 } else {
276 bits = VC1_1REF_MVDATA_VLC_BITS;
277 esc = 71;
278 }
279 extend_x = v->dmvrange & 1;
280 extend_y = (v->dmvrange >> 1) & 1;
281 index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
282 if (index == esc) {
283 *dmv_x = get_bits(gb, v->k_x);
284 *dmv_y = get_bits(gb, v->k_y);
285 if (v->numref) {
286 if (pred_flag)
287 *pred_flag = *dmv_y & 1;
288 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
289 }
290 }
291 else {
292 av_assert0(index < esc);
293 index1 = (index + 1) % 9;
294 if (index1 != 0) {
295 val = get_bits(gb, index1 + extend_x);
296 sign = 0 - (val & 1);
297 *dmv_x = (sign ^ ((val >> 1) + offset_table[extend_x][index1])) - sign;
298 } else
299 *dmv_x = 0;
300 index1 = (index + 1) / 9;
301 if (index1 > v->numref) {
302 val = get_bits(gb, (index1 >> v->numref) + extend_y);
303 sign = 0 - (val & 1);
304 *dmv_y = (sign ^ ((val >> 1) + offset_table[extend_y][index1 >> v->numref])) - sign;
305 } else
306 *dmv_y = 0;
307 if (v->numref && pred_flag)
308 *pred_flag = index1 & 1;
309 }
310 }
311
312 /** Reconstruct motion vector for B-frame and do motion compensation
313 */
314 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
315 int direct, int mode)
316 {
317 if (direct) {
318 ff_vc1_mc_1mv(v, 0);
319 ff_vc1_interp_mc(v);
320 return;
321 }
322 if (mode == BMV_TYPE_INTERPOLATED) {
323 ff_vc1_mc_1mv(v, 0);
324 ff_vc1_interp_mc(v);
325 return;
326 }
327
328 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
329 }
330
331 /** Get predicted DC value for I-frames only
332 * prediction dir: left=0, top=1
333 * @param s MpegEncContext
334 * @param overlap flag indicating that overlap filtering is used
335 * @param pq integer part of picture quantizer
336 * @param[in] n block index in the current MB
337 * @param dc_val_ptr Pointer to DC predictor
338 * @param dir_ptr Prediction direction for use in AC prediction
339 */
340 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
341 int16_t **dc_val_ptr, int *dir_ptr)
342 {
343 int a, b, c, wrap, pred, scale;
344 int16_t *dc_val;
345 static const uint16_t dcpred[32] = {
346 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
347 114, 102, 93, 85, 79, 73, 68, 64,
348 60, 57, 54, 51, 49, 47, 45, 43,
349 41, 39, 38, 37, 35, 34, 33
350 };
351
352 /* find prediction - wmv3_dc_scale always used here in fact */
353 if (n < 4) scale = s->y_dc_scale;
354 else scale = s->c_dc_scale;
355
356 wrap = s->block_wrap[n];
357 dc_val = s->dc_val[0] + s->block_index[n];
358
359 /* B A
360 * C X
361 */
362 c = dc_val[ - 1];
363 b = dc_val[ - 1 - wrap];
364 a = dc_val[ - wrap];
365
366 if (pq < 9 || !overlap) {
367 /* Set outer values */
368 if (s->first_slice_line && (n != 2 && n != 3))
369 b = a = dcpred[scale];
370 if (s->mb_x == 0 && (n != 1 && n != 3))
371 b = c = dcpred[scale];
372 } else {
373 /* Set outer values */
374 if (s->first_slice_line && (n != 2 && n != 3))
375 b = a = 0;
376 if (s->mb_x == 0 && (n != 1 && n != 3))
377 b = c = 0;
378 }
379
380 if (abs(a - b) <= abs(b - c)) {
381 pred = c;
382 *dir_ptr = 1; // left
383 } else {
384 pred = a;
385 *dir_ptr = 0; // top
386 }
387
388 /* update predictor */
389 *dc_val_ptr = &dc_val[0];
390 return pred;
391 }
392
393
394 /** Get predicted DC value
395 * prediction dir: left=0, top=1
396 * @param s MpegEncContext
397 * @param overlap flag indicating that overlap filtering is used
398 * @param pq integer part of picture quantizer
399 * @param[in] n block index in the current MB
400 * @param a_avail flag indicating top block availability
401 * @param c_avail flag indicating left block availability
402 * @param dc_val_ptr Pointer to DC predictor
403 * @param dir_ptr Prediction direction for use in AC prediction
404 */
405 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
406 int a_avail, int c_avail,
407 int16_t **dc_val_ptr, int *dir_ptr)
408 {
409 int a, b, c, wrap, pred;
410 int16_t *dc_val;
411 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
412 int q1, q2 = 0;
413 int dqscale_index;
414
415 /* scale predictors if needed */
416 q1 = FFABS(s->current_picture.qscale_table[mb_pos]);
417 dqscale_index = s->y_dc_scale_table[q1] - 1;
418 if (dqscale_index < 0)
419 return 0;
420
421 wrap = s->block_wrap[n];
422 dc_val = s->dc_val[0] + s->block_index[n];
423
424 /* B A
425 * C X
426 */
427 c = dc_val[ - 1];
428 b = dc_val[ - 1 - wrap];
429 a = dc_val[ - wrap];
430
431 if (c_avail && (n != 1 && n != 3)) {
432 q2 = FFABS(s->current_picture.qscale_table[mb_pos - 1]);
433 if (q2 && q2 != q1)
434 c = (int)((unsigned)c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
435 }
436 if (a_avail && (n != 2 && n != 3)) {
437 q2 = FFABS(s->current_picture.qscale_table[mb_pos - s->mb_stride]);
438 if (q2 && q2 != q1)
439 a = (int)((unsigned)a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
440 }
441 if (a_avail && c_avail && (n != 3)) {
442 int off = mb_pos;
443 if (n != 1)
444 off--;
445 if (n != 2)
446 off -= s->mb_stride;
447 q2 = FFABS(s->current_picture.qscale_table[off]);
448 if (q2 && q2 != q1)
449 b = (int)((unsigned)b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
450 }
451
452 if (c_avail && (!a_avail || abs(a - b) <= abs(b - c))) {
453 pred = c;
454 *dir_ptr = 1; // left
455 } else if (a_avail) {
456 pred = a;
457 *dir_ptr = 0; // top
458 } else {
459 pred = 0;
460 *dir_ptr = 1; // left
461 }
462
463 /* update predictor */
464 *dc_val_ptr = &dc_val[0];
465 return pred;
466 }
467
468 /** @} */ // Block group
469
470 /**
471 * @name VC1 Macroblock-level functions in Simple/Main Profiles
472 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
473 * @{
474 */
475
476 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
477 uint8_t **coded_block_ptr)
478 {
479 int xy, wrap, pred, a, b, c;
480
481 xy = s->block_index[n];
482 wrap = s->b8_stride;
483
484 /* B C
485 * A X
486 */
487 a = s->coded_block[xy - 1 ];
488 b = s->coded_block[xy - 1 - wrap];
489 c = s->coded_block[xy - wrap];
490
491 if (b == c) {
492 pred = a;
493 } else {
494 pred = c;
495 }
496
497 /* store value */
498 *coded_block_ptr = &s->coded_block[xy];
499
500 return pred;
501 }
502
503 /**
504 * Decode one AC coefficient
505 * @param v The VC1 context
506 * @param last Last coefficient
507 * @param skip How much zero coefficients to skip
508 * @param value Decoded AC coefficient value
509 * @param codingset set of VLC to decode data
510 * @see 8.1.3.4
511 */
512 static int vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
513 int *value, int codingset)
514 {
515 GetBitContext *gb = &v->s.gb;
516 int index, run, level, lst, sign;
517
518 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
519 if (index < 0)
520 return index;
521 if (index != ff_vc1_ac_sizes[codingset] - 1) {
522 run = vc1_index_decode_table[codingset][index][0];
523 level = vc1_index_decode_table[codingset][index][1];
524 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
525 sign = get_bits1(gb);
526 } else {
527 int escape = decode210(gb);
528 if (escape != 2) {
529 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
530 if (index >= ff_vc1_ac_sizes[codingset] - 1U)
531 return AVERROR_INVALIDDATA;
532 run = vc1_index_decode_table[codingset][index][0];
533 level = vc1_index_decode_table[codingset][index][1];
534 lst = index >= vc1_last_decode_table[codingset];
535 if (escape == 0) {
536 if (lst)
537 level += vc1_last_delta_level_table[codingset][run];
538 else
539 level += vc1_delta_level_table[codingset][run];
540 } else {
541 if (lst)
542 run += vc1_last_delta_run_table[codingset][level] + 1;
543 else
544 run += vc1_delta_run_table[codingset][level] + 1;
545 }
546 sign = get_bits1(gb);
547 } else {
548 lst = get_bits1(gb);
549 if (v->s.esc3_level_length == 0) {
550 if (v->pq < 8 || v->dquantfrm) { // table 59
551 v->s.esc3_level_length = get_bits(gb, 3);
552 if (!v->s.esc3_level_length)
553 v->s.esc3_level_length = get_bits(gb, 2) + 8;
554 } else { // table 60
555 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
556 }
557 v->s.esc3_run_length = 3 + get_bits(gb, 2);
558 }
559 run = get_bits(gb, v->s.esc3_run_length);
560 sign = get_bits1(gb);
561 level = get_bits(gb, v->s.esc3_level_length);
562 }
563 }
564
565 *last = lst;
566 *skip = run;
567 *value = (level ^ -sign) + sign;
568
569 return 0;
570 }
571
572 /** Decode intra block in intra frames - should be faster than decode_intra_block
573 * @param v VC1Context
574 * @param block block to decode
575 * @param[in] n subblock index
576 * @param coded are AC coeffs present or not
577 * @param codingset set of VLC to decode data
578 */
579 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
580 int coded, int codingset)
581 {
582 GetBitContext *gb = &v->s.gb;
583 MpegEncContext *s = &v->s;
584 int dc_pred_dir = 0; /* Direction of the DC prediction used */
585 int i;
586 int16_t *dc_val;
587 int16_t *ac_val, *ac_val2;
588 int dcdiff, scale;
589
590 /* Get DC differential */
591 if (n < 4) {
592 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
593 } else {
594 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
595 }
596 if (dcdiff) {
597 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
598 if (dcdiff == 119 /* ESC index value */) {
599 dcdiff = get_bits(gb, 8 + m);
600 } else {
601 if (m)
602 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
603 }
604 if (get_bits1(gb))
605 dcdiff = -dcdiff;
606 }
607
608 /* Prediction */
609 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
610 *dc_val = dcdiff;
611
612 /* Store the quantized DC coeff, used for prediction */
613 if (n < 4)
614 scale = s->y_dc_scale;
615 else
616 scale = s->c_dc_scale;
617 block[0] = dcdiff * scale;
618
619 ac_val = s->ac_val[0][s->block_index[n]];
620 ac_val2 = ac_val;
621 if (dc_pred_dir) // left
622 ac_val -= 16;
623 else // top
624 ac_val -= 16 * s->block_wrap[n];
625
626 scale = v->pq * 2 + v->halfpq;
627
628 //AC Decoding
629 i = !!coded;
630
631 if (coded) {
632 int last = 0, skip, value;
633 const uint8_t *zz_table;
634 int k;
635
636 if (v->s.ac_pred) {
637 if (!dc_pred_dir)
638 zz_table = v->zz_8x8[2];
639 else
640 zz_table = v->zz_8x8[3];
641 } else
642 zz_table = v->zz_8x8[1];
643
644 while (!last) {
645 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
646 if (ret < 0)
647 return ret;
648 i += skip;
649 if (i > 63)
650 break;
651 block[zz_table[i++]] = value;
652 }
653
654 /* apply AC prediction if needed */
655 if (s->ac_pred) {
656 int sh;
657 if (dc_pred_dir) { // left
658 sh = v->left_blk_sh;
659 } else { // top
660 sh = v->top_blk_sh;
661 ac_val += 8;
662 }
663 for (k = 1; k < 8; k++)
664 block[k << sh] += ac_val[k];
665 }
666 /* save AC coeffs for further prediction */
667 for (k = 1; k < 8; k++) {
668 ac_val2[k] = block[k << v->left_blk_sh];
669 ac_val2[k + 8] = block[k << v->top_blk_sh];
670 }
671
672 /* scale AC coeffs */
673 for (k = 1; k < 64; k++)
674 if (block[k]) {
675 block[k] *= scale;
676 if (!v->pquantizer)
677 block[k] += (block[k] < 0) ? -v->pq : v->pq;
678 }
679
680 } else {
681 int k;
682
683 memset(ac_val2, 0, 16 * 2);
684
685 /* apply AC prediction if needed */
686 if (s->ac_pred) {
687 int sh;
688 if (dc_pred_dir) { //left
689 sh = v->left_blk_sh;
690 } else { // top
691 sh = v->top_blk_sh;
692 ac_val += 8;
693 ac_val2 += 8;
694 }
695 memcpy(ac_val2, ac_val, 8 * 2);
696 for (k = 1; k < 8; k++) {
697 block[k << sh] = ac_val[k] * scale;
698 if (!v->pquantizer && block[k << sh])
699 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
700 }
701 }
702 }
703 if (s->ac_pred) i = 63;
704 s->block_last_index[n] = i;
705
706 return 0;
707 }
708
709 /** Decode intra block in intra frames - should be faster than decode_intra_block
710 * @param v VC1Context
711 * @param block block to decode
712 * @param[in] n subblock number
713 * @param coded are AC coeffs present or not
714 * @param codingset set of VLC to decode data
715 * @param mquant quantizer value for this macroblock
716 */
717 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
718 int coded, int codingset, int mquant)
719 {
720 GetBitContext *gb = &v->s.gb;
721 MpegEncContext *s = &v->s;
722 int dc_pred_dir = 0; /* Direction of the DC prediction used */
723 int i;
724 int16_t *dc_val = NULL;
725 int16_t *ac_val, *ac_val2;
726 int dcdiff;
727 int a_avail = v->a_avail, c_avail = v->c_avail;
728 int use_pred = s->ac_pred;
729 int scale;
730 int q1, q2 = 0;
731 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
732 int quant = FFABS(mquant);
733
734 /* Get DC differential */
735 if (n < 4) {
736 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
737 } else {
738 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
739 }
740 if (dcdiff) {
741 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
742 if (dcdiff == 119 /* ESC index value */) {
743 dcdiff = get_bits(gb, 8 + m);
744 } else {
745 if (m)
746 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
747 }
748 if (get_bits1(gb))
749 dcdiff = -dcdiff;
750 }
751
752 /* Prediction */
753 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
754 *dc_val = dcdiff;
755
756 /* Store the quantized DC coeff, used for prediction */
757 if (n < 4)
758 scale = s->y_dc_scale;
759 else
760 scale = s->c_dc_scale;
761 block[0] = dcdiff * scale;
762
763 /* check if AC is needed at all */
764 if (!a_avail && !c_avail)
765 use_pred = 0;
766
767 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
768
769 ac_val = s->ac_val[0][s->block_index[n]];
770 ac_val2 = ac_val;
771 if (dc_pred_dir) // left
772 ac_val -= 16;
773 else // top
774 ac_val -= 16 * s->block_wrap[n];
775
776 q1 = s->current_picture.qscale_table[mb_pos];
777 if (n == 3)
778 q2 = q1;
779 else if (dc_pred_dir) {
780 if (n == 1)
781 q2 = q1;
782 else if (c_avail && mb_pos)
783 q2 = s->current_picture.qscale_table[mb_pos - 1];
784 } else {
785 if (n == 2)
786 q2 = q1;
787 else if (a_avail && mb_pos >= s->mb_stride)
788 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
789 }
790
791 //AC Decoding
792 i = 1;
793
794 if (coded) {
795 int last = 0, skip, value;
796 const uint8_t *zz_table;
797 int k;
798
799 if (v->s.ac_pred) {
800 if (!use_pred && v->fcm == ILACE_FRAME) {
801 zz_table = v->zzi_8x8;
802 } else {
803 if (!dc_pred_dir) // top
804 zz_table = v->zz_8x8[2];
805 else // left
806 zz_table = v->zz_8x8[3];
807 }
808 } else {
809 if (v->fcm != ILACE_FRAME)
810 zz_table = v->zz_8x8[1];
811 else
812 zz_table = v->zzi_8x8;
813 }
814
815 while (!last) {
816 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
817 if (ret < 0)
818 return ret;
819 i += skip;
820 if (i > 63)
821 break;
822 block[zz_table[i++]] = value;
823 }
824
825 /* apply AC prediction if needed */
826 if (use_pred) {
827 int sh;
828 if (dc_pred_dir) { // left
829 sh = v->left_blk_sh;
830 } else { // top
831 sh = v->top_blk_sh;
832 ac_val += 8;
833 }
834 /* scale predictors if needed*/
835 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
836 if (q1 < 1)
837 return AVERROR_INVALIDDATA;
838 if (q2)
839 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
840 if (q2 && q1 != q2) {
841 for (k = 1; k < 8; k++)
842 block[k << sh] += (int)(ac_val[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
843 } else {
844 for (k = 1; k < 8; k++)
845 block[k << sh] += ac_val[k];
846 }
847 }
848 /* save AC coeffs for further prediction */
849 for (k = 1; k < 8; k++) {
850 ac_val2[k ] = block[k << v->left_blk_sh];
851 ac_val2[k + 8] = block[k << v->top_blk_sh];
852 }
853
854 /* scale AC coeffs */
855 for (k = 1; k < 64; k++)
856 if (block[k]) {
857 block[k] *= scale;
858 if (!v->pquantizer)
859 block[k] += (block[k] < 0) ? -quant : quant;
860 }
861
862 } else { // no AC coeffs
863 int k;
864
865 memset(ac_val2, 0, 16 * 2);
866
867 /* apply AC prediction if needed */
868 if (use_pred) {
869 int sh;
870 if (dc_pred_dir) { // left
871 sh = v->left_blk_sh;
872 } else { // top
873 sh = v->top_blk_sh;
874 ac_val += 8;
875 ac_val2 += 8;
876 }
877 memcpy(ac_val2, ac_val, 8 * 2);
878 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
879 if (q1 < 1)
880 return AVERROR_INVALIDDATA;
881 if (q2)
882 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
883 if (q2 && q1 != q2) {
884 for (k = 1; k < 8; k++)
885 ac_val2[k] = (int)(ac_val2[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
886 }
887 for (k = 1; k < 8; k++) {
888 block[k << sh] = ac_val2[k] * scale;
889 if (!v->pquantizer && block[k << sh])
890 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
891 }
892 }
893 }
894 if (use_pred) i = 63;
895 s->block_last_index[n] = i;
896
897 return 0;
898 }
899
900 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
901 * @param v VC1Context
902 * @param block block to decode
903 * @param[in] n subblock index
904 * @param coded are AC coeffs present or not
905 * @param mquant block quantizer
906 * @param codingset set of VLC to decode data
907 */
908 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
909 int coded, int mquant, int codingset)
910 {
911 GetBitContext *gb = &v->s.gb;
912 MpegEncContext *s = &v->s;
913 int dc_pred_dir = 0; /* Direction of the DC prediction used */
914 int i;
915 int16_t *dc_val = NULL;
916 int16_t *ac_val, *ac_val2;
917 int dcdiff;
918 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
919 int a_avail = v->a_avail, c_avail = v->c_avail;
920 int use_pred = s->ac_pred;
921 int scale;
922 int q1, q2 = 0;
923 int quant = FFABS(mquant);
924
925 s->bdsp.clear_block(block);
926
927 /* XXX: Guard against dumb values of mquant */
928 quant = av_clip_uintp2(quant, 5);
929
930 /* Set DC scale - y and c use the same */
931 s->y_dc_scale = s->y_dc_scale_table[quant];
932 s->c_dc_scale = s->c_dc_scale_table[quant];
933
934 /* Get DC differential */
935 if (n < 4) {
936 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
937 } else {
938 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
939 }
940 if (dcdiff) {
941 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
942 if (dcdiff == 119 /* ESC index value */) {
943 dcdiff = get_bits(gb, 8 + m);
944 } else {
945 if (m)
946 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
947 }
948 if (get_bits1(gb))
949 dcdiff = -dcdiff;
950 }
951
952 /* Prediction */
953 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
954 *dc_val = dcdiff;
955
956 /* Store the quantized DC coeff, used for prediction */
957
958 if (n < 4) {
959 block[0] = dcdiff * s->y_dc_scale;
960 } else {
961 block[0] = dcdiff * s->c_dc_scale;
962 }
963
964 //AC Decoding
965 i = 1;
966
967 /* check if AC is needed at all and adjust direction if needed */
968 if (!a_avail) dc_pred_dir = 1;
969 if (!c_avail) dc_pred_dir = 0;
970 if (!a_avail && !c_avail) use_pred = 0;
971 ac_val = s->ac_val[0][s->block_index[n]];
972 ac_val2 = ac_val;
973
974 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
975
976 if (dc_pred_dir) //left
977 ac_val -= 16;
978 else //top
979 ac_val -= 16 * s->block_wrap[n];
980
981 q1 = s->current_picture.qscale_table[mb_pos];
982 if (dc_pred_dir && c_avail && mb_pos)
983 q2 = s->current_picture.qscale_table[mb_pos - 1];
984 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
985 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
986 if (dc_pred_dir && n == 1)
987 q2 = q1;
988 if (!dc_pred_dir && n == 2)
989 q2 = q1;
990 if (n == 3) q2 = q1;
991
992 if (coded) {
993 int last = 0, skip, value;
994 int k;
995
996 while (!last) {
997 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
998 if (ret < 0)
999 return ret;
1000 i += skip;
1001 if (i > 63)
1002 break;
1003 if (v->fcm == PROGRESSIVE)
1004 block[v->zz_8x8[0][i++]] = value;
1005 else {
1006 if (use_pred && (v->fcm == ILACE_FRAME)) {
1007 if (!dc_pred_dir) // top
1008 block[v->zz_8x8[2][i++]] = value;
1009 else // left
1010 block[v->zz_8x8[3][i++]] = value;
1011 } else {
1012 block[v->zzi_8x8[i++]] = value;
1013 }
1014 }
1015 }
1016
1017 /* apply AC prediction if needed */
1018 if (use_pred) {
1019 /* scale predictors if needed*/
1020 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1021 if (q1 < 1)
1022 return AVERROR_INVALIDDATA;
1023 if (q2)
1024 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1025 if (q2 && q1 != q2) {
1026 if (dc_pred_dir) { // left
1027 for (k = 1; k < 8; k++)
1028 block[k << v->left_blk_sh] += (int)(ac_val[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1029 } else { //top
1030 for (k = 1; k < 8; k++)
1031 block[k << v->top_blk_sh] += (int)(ac_val[k + 8] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1032 }
1033 } else {
1034 if (dc_pred_dir) { // left
1035 for (k = 1; k < 8; k++)
1036 block[k << v->left_blk_sh] += ac_val[k];
1037 } else { // top
1038 for (k = 1; k < 8; k++)
1039 block[k << v->top_blk_sh] += ac_val[k + 8];
1040 }
1041 }
1042 }
1043 /* save AC coeffs for further prediction */
1044 for (k = 1; k < 8; k++) {
1045 ac_val2[k ] = block[k << v->left_blk_sh];
1046 ac_val2[k + 8] = block[k << v->top_blk_sh];
1047 }
1048
1049 /* scale AC coeffs */
1050 for (k = 1; k < 64; k++)
1051 if (block[k]) {
1052 block[k] *= scale;
1053 if (!v->pquantizer)
1054 block[k] += (block[k] < 0) ? -quant : quant;
1055 }
1056
1057 if (use_pred) i = 63;
1058 } else { // no AC coeffs
1059 int k;
1060
1061 memset(ac_val2, 0, 16 * 2);
1062 if (dc_pred_dir) { // left
1063 if (use_pred) {
1064 memcpy(ac_val2, ac_val, 8 * 2);
1065 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1066 if (q1 < 1)
1067 return AVERROR_INVALIDDATA;
1068 if (q2)
1069 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1070 if (q2 && q1 != q2) {
1071 for (k = 1; k < 8; k++)
1072 ac_val2[k] = (int)(ac_val2[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1073 }
1074 }
1075 } else { // top
1076 if (use_pred) {
1077 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1078 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1079 if (q1 < 1)
1080 return AVERROR_INVALIDDATA;
1081 if (q2)
1082 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1083 if (q2 && q1 != q2) {
1084 for (k = 1; k < 8; k++)
1085 ac_val2[k + 8] = (int)(ac_val2[k + 8] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1086 }
1087 }
1088 }
1089
1090 /* apply AC prediction if needed */
1091 if (use_pred) {
1092 if (dc_pred_dir) { // left
1093 for (k = 1; k < 8; k++) {
1094 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1095 if (!v->pquantizer && block[k << v->left_blk_sh])
1096 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1097 }
1098 } else { // top
1099 for (k = 1; k < 8; k++) {
1100 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1101 if (!v->pquantizer && block[k << v->top_blk_sh])
1102 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1103 }
1104 }
1105 i = 63;
1106 }
1107 }
1108 s->block_last_index[n] = i;
1109
1110 return 0;
1111 }
1112
1113 /** Decode P block
1114 */
1115 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1116 int mquant, int ttmb, int first_block,
1117 uint8_t *dst, int linesize, int skip_block,
1118 int *ttmb_out)
1119 {
1120 MpegEncContext *s = &v->s;
1121 GetBitContext *gb = &s->gb;
1122 int i, j;
1123 int subblkpat = 0;
1124 int scale, off, idx, last, skip, value;
1125 int ttblk = ttmb & 7;
1126 int pat = 0;
1127 int quant = FFABS(mquant);
1128
1129 s->bdsp.clear_block(block);
1130
1131 if (ttmb == -1) {
1132 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
1133 }
1134 if (ttblk == TT_4X4) {
1135 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1136 }
1137 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1138 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1139 || (!v->res_rtm_flag && !first_block))) {
1140 subblkpat = decode012(gb);
1141 if (subblkpat)
1142 subblkpat ^= 3; // swap decoded pattern bits
1143 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1144 ttblk = TT_8X4;
1145 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1146 ttblk = TT_4X8;
1147 }
1148 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1149
1150 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1151 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1152 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1153 ttblk = TT_8X4;
1154 }
1155 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1156 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1157 ttblk = TT_4X8;
1158 }
1159 switch (ttblk) {
1160 case TT_8X8:
1161 pat = 0xF;
1162 i = 0;
1163 last = 0;
1164 while (!last) {
1165 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1166 if (ret < 0)
1167 return ret;
1168 i += skip;
1169 if (i > 63)
1170 break;
1171 if (!v->fcm)
1172 idx = v->zz_8x8[0][i++];
1173 else
1174 idx = v->zzi_8x8[i++];
1175 block[idx] = value * scale;
1176 if (!v->pquantizer)
1177 block[idx] += (block[idx] < 0) ? -quant : quant;
1178 }
1179 if (!skip_block) {
1180 if (i == 1)
1181 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1182 else {
1183 v->vc1dsp.vc1_inv_trans_8x8(block);
1184 s->idsp.add_pixels_clamped(block, dst, linesize);
1185 }
1186 }
1187 break;
1188 case TT_4X4:
1189 pat = ~subblkpat & 0xF;
1190 for (j = 0; j < 4; j++) {
1191 last = subblkpat & (1 << (3 - j));
1192 i = 0;
1193 off = (j & 1) * 4 + (j & 2) * 16;
1194 while (!last) {
1195 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1196 if (ret < 0)
1197 return ret;
1198 i += skip;
1199 if (i > 15)
1200 break;
1201 if (!v->fcm)
1202 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1203 else
1204 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1205 block[idx + off] = value * scale;
1206 if (!v->pquantizer)
1207 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1208 }
1209 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1210 if (i == 1)
1211 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1212 else
1213 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1214 }
1215 }
1216 break;
1217 case TT_8X4:
1218 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1219 for (j = 0; j < 2; j++) {
1220 last = subblkpat & (1 << (1 - j));
1221 i = 0;
1222 off = j * 32;
1223 while (!last) {
1224 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1225 if (ret < 0)
1226 return ret;
1227 i += skip;
1228 if (i > 31)
1229 break;
1230 if (!v->fcm)
1231 idx = v->zz_8x4[i++] + off;
1232 else
1233 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1234 block[idx] = value * scale;
1235 if (!v->pquantizer)
1236 block[idx] += (block[idx] < 0) ? -quant : quant;
1237 }
1238 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1239 if (i == 1)
1240 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1241 else
1242 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1243 }
1244 }
1245 break;
1246 case TT_4X8:
1247 pat = ~(subblkpat * 5) & 0xF;
1248 for (j = 0; j < 2; j++) {
1249 last = subblkpat & (1 << (1 - j));
1250 i = 0;
1251 off = j * 4;
1252 while (!last) {
1253 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1254 if (ret < 0)
1255 return ret;
1256 i += skip;
1257 if (i > 31)
1258 break;
1259 if (!v->fcm)
1260 idx = v->zz_4x8[i++] + off;
1261 else
1262 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1263 block[idx] = value * scale;
1264 if (!v->pquantizer)
1265 block[idx] += (block[idx] < 0) ? -quant : quant;
1266 }
1267 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1268 if (i == 1)
1269 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1270 else
1271 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1272 }
1273 }
1274 break;
1275 }
1276 if (ttmb_out)
1277 *ttmb_out |= ttblk << (n * 4);
1278 return pat;
1279 }
1280
1281 /** @} */ // Macroblock group
1282
1283 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1284
1285 /** Decode one P-frame MB
1286 */
1287 static int vc1_decode_p_mb(VC1Context *v)
1288 {
1289 MpegEncContext *s = &v->s;
1290 GetBitContext *gb = &s->gb;
1291 int i, j;
1292 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1293 int cbp; /* cbp decoding stuff */
1294 int mqdiff, mquant; /* MB quantization */
1295 int ttmb = v->ttfrm; /* MB Transform type */
1296
1297 int mb_has_coeffs = 1; /* last_flag */
1298 int dmv_x, dmv_y; /* Differential MV components */
1299 int index, index1; /* LUT indexes */
1300 int val, sign; /* temp values */
1301 int first_block = 1;
1302 int dst_idx, off;
1303 int skipped, fourmv;
1304 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1305 int ret;
1306
1307 mquant = v->pq; /* lossy initialization */
1308
1309 if (v->mv_type_is_raw)
1310 fourmv = get_bits1(gb);
1311 else
1312 fourmv = v->mv_type_mb_plane[mb_pos];
1313 if (v->skip_is_raw)
1314 skipped = get_bits1(gb);
1315 else
1316 skipped = v->s.mbskip_table[mb_pos];
1317
1318 if (!fourmv) { /* 1MV mode */
1319 if (!skipped) {
1320 GET_MVDATA(dmv_x, dmv_y);
1321
1322 if (s->mb_intra) {
1323 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1324 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1325 }
1326 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1327 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1328
1329 /* FIXME Set DC val for inter block ? */
1330 if (s->mb_intra && !mb_has_coeffs) {
1331 GET_MQUANT();
1332 s->ac_pred = get_bits1(gb);
1333 cbp = 0;
1334 } else if (mb_has_coeffs) {
1335 if (s->mb_intra)
1336 s->ac_pred = get_bits1(gb);
1337 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1338 GET_MQUANT();
1339 } else {
1340 mquant = v->pq;
1341 cbp = 0;
1342 }
1343 s->current_picture.qscale_table[mb_pos] = mquant;
1344
1345 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1346 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1347 VC1_TTMB_VLC_BITS, 2);
1348 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1349 dst_idx = 0;
1350 for (i = 0; i < 6; i++) {
1351 s->dc_val[0][s->block_index[i]] = 0;
1352 dst_idx += i >> 2;
1353 val = ((cbp >> (5 - i)) & 1);
1354 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1355 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1356 if (s->mb_intra) {
1357 /* check if prediction blocks A and C are available */
1358 v->a_avail = v->c_avail = 0;
1359 if (i == 2 || i == 3 || !s->first_slice_line)
1360 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1361 if (i == 1 || i == 3 || s->mb_x)
1362 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1363
1364 ret = vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1365 (i & 4) ? v->codingset2 : v->codingset);
1366 if (ret < 0)
1367 return ret;
1368 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1369 continue;
1370 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1371 if (v->rangeredfrm)
1372 for (j = 0; j < 64; j++)
1373 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1374 block_cbp |= 0xF << (i << 2);
1375 block_intra |= 1 << i;
1376 } else if (val) {
1377 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1378 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1379 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1380 if (pat < 0)
1381 return pat;
1382 block_cbp |= pat << (i << 2);
1383 if (!v->ttmbf && ttmb < 8)
1384 ttmb = -1;
1385 first_block = 0;
1386 }
1387 }
1388 } else { // skipped
1389 s->mb_intra = 0;
1390 for (i = 0; i < 6; i++) {
1391 v->mb_type[0][s->block_index[i]] = 0;
1392 s->dc_val[0][s->block_index[i]] = 0;
1393 }
1394 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1395 s->current_picture.qscale_table[mb_pos] = 0;
1396 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1397 ff_vc1_mc_1mv(v, 0);
1398 }
1399 } else { // 4MV mode
1400 if (!skipped /* unskipped MB */) {
1401 int intra_count = 0, coded_inter = 0;
1402 int is_intra[6], is_coded[6];
1403 /* Get CBPCY */
1404 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1405 for (i = 0; i < 6; i++) {
1406 val = ((cbp >> (5 - i)) & 1);
1407 s->dc_val[0][s->block_index[i]] = 0;
1408 s->mb_intra = 0;
1409 if (i < 4) {
1410 dmv_x = dmv_y = 0;
1411 s->mb_intra = 0;
1412 mb_has_coeffs = 0;
1413 if (val) {
1414 GET_MVDATA(dmv_x, dmv_y);
1415 }
1416 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1417 if (!s->mb_intra)
1418 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1419 intra_count += s->mb_intra;
1420 is_intra[i] = s->mb_intra;
1421 is_coded[i] = mb_has_coeffs;
1422 }
1423 if (i & 4) {
1424 is_intra[i] = (intra_count >= 3);
1425 is_coded[i] = val;
1426 }
1427 if (i == 4)
1428 ff_vc1_mc_4mv_chroma(v, 0);
1429 v->mb_type[0][s->block_index[i]] = is_intra[i];
1430 if (!coded_inter)
1431 coded_inter = !is_intra[i] & is_coded[i];
1432 }
1433 // if there are no coded blocks then don't do anything more
1434 dst_idx = 0;
1435 if (!intra_count && !coded_inter)
1436 goto end;
1437 GET_MQUANT();
1438 s->current_picture.qscale_table[mb_pos] = mquant;
1439 /* test if block is intra and has pred */
1440 {
1441 int intrapred = 0;
1442 for (i = 0; i < 6; i++)
1443 if (is_intra[i]) {
1444 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1445 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1446 intrapred = 1;
1447 break;
1448 }
1449 }
1450 if (intrapred)
1451 s->ac_pred = get_bits1(gb);
1452 else
1453 s->ac_pred = 0;
1454 }
1455 if (!v->ttmbf && coded_inter)
1456 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1457 for (i = 0; i < 6; i++) {
1458 dst_idx += i >> 2;
1459 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1460 s->mb_intra = is_intra[i];
1461 if (is_intra[i]) {
1462 /* check if prediction blocks A and C are available */
1463 v->a_avail = v->c_avail = 0;
1464 if (i == 2 || i == 3 || !s->first_slice_line)
1465 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1466 if (i == 1 || i == 3 || s->mb_x)
1467 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1468
1469 ret = vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1470 (i & 4) ? v->codingset2 : v->codingset);
1471 if (ret < 0)
1472 return ret;
1473 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1474 continue;
1475 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1476 if (v->rangeredfrm)
1477 for (j = 0; j < 64; j++)
1478 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1479 block_cbp |= 0xF << (i << 2);
1480 block_intra |= 1 << i;
1481 } else if (is_coded[i]) {
1482 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1483 first_block, s->dest[dst_idx] + off,
1484 (i & 4) ? s->uvlinesize : s->linesize,
1485 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1486 &block_tt);
1487 if (pat < 0)
1488 return pat;
1489 block_cbp |= pat << (i << 2);
1490 if (!v->ttmbf && ttmb < 8)
1491 ttmb = -1;
1492 first_block = 0;
1493 }
1494 }
1495 } else { // skipped MB
1496 s->mb_intra = 0;
1497 s->current_picture.qscale_table[mb_pos] = 0;
1498 for (i = 0; i < 6; i++) {
1499 v->mb_type[0][s->block_index[i]] = 0;
1500 s->dc_val[0][s->block_index[i]] = 0;
1501 }
1502 for (i = 0; i < 4; i++) {
1503 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1504 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1505 }
1506 ff_vc1_mc_4mv_chroma(v, 0);
1507 s->current_picture.qscale_table[mb_pos] = 0;
1508 }
1509 }
1510 end:
1511 if (v->overlap && v->pq >= 9)
1512 ff_vc1_p_overlap_filter(v);
1513 vc1_put_blocks_clamped(v, 1);
1514
1515 v->cbp[s->mb_x] = block_cbp;
1516 v->ttblk[s->mb_x] = block_tt;
1517 v->is_intra[s->mb_x] = block_intra;
1518
1519 return 0;
1520 }
1521
1522 /* Decode one macroblock in an interlaced frame p picture */
1523
1524 static int vc1_decode_p_mb_intfr(VC1Context *v)
1525 {
1526 MpegEncContext *s = &v->s;
1527 GetBitContext *gb = &s->gb;
1528 int i;
1529 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1530 int cbp = 0; /* cbp decoding stuff */
1531 int mqdiff, mquant; /* MB quantization */
1532 int ttmb = v->ttfrm; /* MB Transform type */
1533
1534 int mb_has_coeffs = 1; /* last_flag */
1535 int dmv_x, dmv_y; /* Differential MV components */
1536 int val; /* temp value */
1537 int first_block = 1;
1538 int dst_idx, off;
1539 int skipped, fourmv = 0, twomv = 0;
1540 int block_cbp = 0, pat, block_tt = 0;
1541 int idx_mbmode = 0, mvbp;
1542 int fieldtx;
1543 int ret;
1544
1545 mquant = v->pq; /* Lossy initialization */
1546
1547 if (v->skip_is_raw)
1548 skipped = get_bits1(gb);
1549 else
1550 skipped = v->s.mbskip_table[mb_pos];
1551 if (!skipped) {
1552 if (v->fourmvswitch)
1553 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1554 else
1555 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1556 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1557 /* store the motion vector type in a flag (useful later) */
1558 case MV_PMODE_INTFR_4MV:
1559 fourmv = 1;
1560 v->blk_mv_type[s->block_index[0]] = 0;
1561 v->blk_mv_type[s->block_index[1]] = 0;
1562 v->blk_mv_type[s->block_index[2]] = 0;
1563 v->blk_mv_type[s->block_index[3]] = 0;
1564 break;
1565 case MV_PMODE_INTFR_4MV_FIELD:
1566 fourmv = 1;
1567 v->blk_mv_type[s->block_index[0]] = 1;
1568 v->blk_mv_type[s->block_index[1]] = 1;
1569 v->blk_mv_type[s->block_index[2]] = 1;
1570 v->blk_mv_type[s->block_index[3]] = 1;
1571 break;
1572 case MV_PMODE_INTFR_2MV_FIELD:
1573 twomv = 1;
1574 v->blk_mv_type[s->block_index[0]] = 1;
1575 v->blk_mv_type[s->block_index[1]] = 1;
1576 v->blk_mv_type[s->block_index[2]] = 1;
1577 v->blk_mv_type[s->block_index[3]] = 1;
1578 break;
1579 case MV_PMODE_INTFR_1MV:
1580 v->blk_mv_type[s->block_index[0]] = 0;
1581 v->blk_mv_type[s->block_index[1]] = 0;
1582 v->blk_mv_type[s->block_index[2]] = 0;
1583 v->blk_mv_type[s->block_index[3]] = 0;
1584 break;
1585 }
1586 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1587 for (i = 0; i < 4; i++) {
1588 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1589 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1590 }
1591 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1592 s->mb_intra = 1;
1593 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1594 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1595 mb_has_coeffs = get_bits1(gb);
1596 if (mb_has_coeffs)
1597 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1598 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1599 GET_MQUANT();
1600 s->current_picture.qscale_table[mb_pos] = mquant;
1601 /* Set DC scale - y and c use the same (not sure if necessary here) */
1602 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1603 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1604 dst_idx = 0;
1605 for (i = 0; i < 6; i++) {
1606 v->a_avail = v->c_avail = 0;
1607 v->mb_type[0][s->block_index[i]] = 1;
1608 s->dc_val[0][s->block_index[i]] = 0;
1609 dst_idx += i >> 2;
1610 val = ((cbp >> (5 - i)) & 1);
1611 if (i == 2 || i == 3 || !s->first_slice_line)
1612 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1613 if (i == 1 || i == 3 || s->mb_x)
1614 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1615
1616 ret = vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1617 (i & 4) ? v->codingset2 : v->codingset);
1618 if (ret < 0)
1619 return ret;
1620 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1621 continue;
1622 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1623 if (i < 4)
1624 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1625 else
1626 off = 0;
1627 block_cbp |= 0xf << (i << 2);
1628 }
1629
1630 } else { // inter MB
1631 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1632 if (mb_has_coeffs)
1633 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1634 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1635 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1636 } else {
1637 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1638 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1639 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1640 }
1641 }
1642 s->mb_intra = v->is_intra[s->mb_x] = 0;
1643 for (i = 0; i < 6; i++)
1644 v->mb_type[0][s->block_index[i]] = 0;
1645 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1646 /* for all motion vector read MVDATA and motion compensate each block */
1647 dst_idx = 0;
1648 if (fourmv) {
1649 mvbp = v->fourmvbp;
1650 for (i = 0; i < 4; i++) {
1651 dmv_x = dmv_y = 0;
1652 if (mvbp & (8 >> i))
1653 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1654 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, 0);
1655 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1656 }
1657 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1658 } else if (twomv) {
1659 mvbp = v->twomvbp;
1660 dmv_x = dmv_y = 0;
1661 if (mvbp & 2) {
1662 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1663 }
1664 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1665 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1666 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1667 dmv_x = dmv_y = 0;
1668 if (mvbp & 1) {
1669 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1670 }
1671 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1672 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1673 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1674 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1675 } else {
1676 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1677 dmv_x = dmv_y = 0;
1678 if (mvbp) {
1679 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1680 }
1681 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 0);
1682 ff_vc1_mc_1mv(v, 0);
1683 }
1684 if (cbp)
1685 GET_MQUANT(); // p. 227
1686 s->current_picture.qscale_table[mb_pos] = mquant;
1687 if (!v->ttmbf && cbp)
1688 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1689 for (i = 0; i < 6; i++) {
1690 s->dc_val[0][s->block_index[i]] = 0;
1691 dst_idx += i >> 2;
1692 val = ((cbp >> (5 - i)) & 1);
1693 if (!fieldtx)
1694 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1695 else
1696 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1697 if (val) {
1698 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1699 first_block, s->dest[dst_idx] + off,
1700 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1701 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1702 if (pat < 0)
1703 return pat;
1704 block_cbp |= pat << (i << 2);
1705 if (!v->ttmbf && ttmb < 8)
1706 ttmb = -1;
1707 first_block = 0;
1708 }
1709 }
1710 }
1711 } else { // skipped
1712 s->mb_intra = v->is_intra[s->mb_x] = 0;
1713 for (i = 0; i < 6; i++) {
1714 v->mb_type[0][s->block_index[i]] = 0;
1715 s->dc_val[0][s->block_index[i]] = 0;
1716 }
1717 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1718 s->current_picture.qscale_table[mb_pos] = 0;
1719 v->blk_mv_type[s->block_index[0]] = 0;
1720 v->blk_mv_type[s->block_index[1]] = 0;
1721 v->blk_mv_type[s->block_index[2]] = 0;
1722 v->blk_mv_type[s->block_index[3]] = 0;
1723 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 0);
1724 ff_vc1_mc_1mv(v, 0);
1725 v->fieldtx_plane[mb_pos] = 0;
1726 }
1727 if (v->overlap && v->pq >= 9)
1728 ff_vc1_p_overlap_filter(v);
1729 vc1_put_blocks_clamped(v, 1);
1730
1731 v->cbp[s->mb_x] = block_cbp;
1732 v->ttblk[s->mb_x] = block_tt;
1733
1734 return 0;
1735 }
1736
1737 static int vc1_decode_p_mb_intfi(VC1Context *v)
1738 {
1739 MpegEncContext *s = &v->s;
1740 GetBitContext *gb = &s->gb;
1741 int i;
1742 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1743 int cbp = 0; /* cbp decoding stuff */
1744 int mqdiff, mquant; /* MB quantization */
1745 int ttmb = v->ttfrm; /* MB Transform type */
1746
1747 int mb_has_coeffs = 1; /* last_flag */
1748 int dmv_x, dmv_y; /* Differential MV components */
1749 int val; /* temp values */
1750 int first_block = 1;
1751 int dst_idx, off;
1752 int pred_flag = 0;
1753 int block_cbp = 0, pat, block_tt = 0;
1754 int idx_mbmode = 0;
1755 int ret;
1756
1757 mquant = v->pq; /* Lossy initialization */
1758
1759 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1760 if (idx_mbmode <= 1) { // intra MB
1761 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1762 s->mb_intra = 1;
1763 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1764 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1765 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1766 GET_MQUANT();
1767 s->current_picture.qscale_table[mb_pos] = mquant;
1768 /* Set DC scale - y and c use the same (not sure if necessary here) */
1769 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1770 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1771 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1772 mb_has_coeffs = idx_mbmode & 1;
1773 if (mb_has_coeffs)
1774 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1775 dst_idx = 0;
1776 for (i = 0; i < 6; i++) {
1777 v->a_avail = v->c_avail = 0;
1778 v->mb_type[0][s->block_index[i]] = 1;
1779 s->dc_val[0][s->block_index[i]] = 0;
1780 dst_idx += i >> 2;
1781 val = ((cbp >> (5 - i)) & 1);
1782 if (i == 2 || i == 3 || !s->first_slice_line)
1783 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1784 if (i == 1 || i == 3 || s->mb_x)
1785 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1786
1787 ret = vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1788 (i & 4) ? v->codingset2 : v->codingset);
1789 if (ret < 0)
1790 return ret;
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 */
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 int ret;
1882
1883 mquant = v->pq; /* lossy initialization */
1884 s->mb_intra = 0;
1885
1886 if (v->dmb_is_raw)
1887 direct = get_bits1(gb);
1888 else
1889 direct = v->direct_mb_plane[mb_pos];
1890 if (v->skip_is_raw)
1891 skipped = get_bits1(gb);
1892 else
1893 skipped = v->s.mbskip_table[mb_pos];
1894
1895 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1896 for (i = 0; i < 6; i++) {
1897 v->mb_type[0][s->block_index[i]] = 0;
1898 s->dc_val[0][s->block_index[i]] = 0;
1899 }
1900 s->current_picture.qscale_table[mb_pos] = 0;
1901
1902 if (!direct) {
1903 if (!skipped) {
1904 GET_MVDATA(dmv_x[0], dmv_y[0]);
1905 dmv_x[1] = dmv_x[0];
1906 dmv_y[1] = dmv_y[0];
1907 }
1908 if (skipped || !s->mb_intra) {
1909 bmvtype = decode012(gb);
1910 switch (bmvtype) {
1911 case 0:
1912 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1913 break;
1914 case 1:
1915 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1916 break;
1917 case 2:
1918 bmvtype = BMV_TYPE_INTERPOLATED;
1919 dmv_x[0] = dmv_y[0] = 0;
1920 }
1921 }
1922 }
1923 for (i = 0; i < 6; i++)
1924 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1925
1926 if (skipped) {
1927 if (direct)
1928 bmvtype = BMV_TYPE_INTERPOLATED;
1929 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1930 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1931 return 0;
1932 }
1933 if (direct) {
1934 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1935 GET_MQUANT();
1936 s->mb_intra = 0;
1937 s->current_picture.qscale_table[mb_pos] = mquant;
1938 if (!v->ttmbf)
1939 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1940 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1941 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1942 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1943 } else {
1944 if (!mb_has_coeffs && !s->mb_intra) {
1945 /* no coded blocks - effectively skipped */
1946 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1947 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1948 return 0;
1949 }
1950 if (s->mb_intra && !mb_has_coeffs) {
1951 GET_MQUANT();
1952 s->current_picture.qscale_table[mb_pos] = mquant;
1953 s->ac_pred = get_bits1(gb);
1954 cbp = 0;
1955 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1956 } else {
1957 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1958 GET_MVDATA(dmv_x[0], dmv_y[0]);
1959 if (!mb_has_coeffs) {
1960 /* interpolated skipped block */
1961 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1962 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1963 return 0;
1964 }
1965 }
1966 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1967 if (!s->mb_intra) {
1968 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1969 }
1970 if (s->mb_intra)
1971 s->ac_pred = get_bits1(gb);
1972 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1973 GET_MQUANT();
1974 s->current_picture.qscale_table[mb_pos] = mquant;
1975 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1976 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1977 }
1978 }
1979 dst_idx = 0;
1980 for (i = 0; i < 6; i++) {
1981 s->dc_val[0][s->block_index[i]] = 0;
1982 dst_idx += i >> 2;
1983 val = ((cbp >> (5 - i)) & 1);
1984 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1985 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1986 if (s->mb_intra) {
1987 /* check if prediction blocks A and C are available */
1988 v->a_avail = v->c_avail = 0;
1989 if (i == 2 || i == 3 || !s->first_slice_line)
1990 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1991 if (i == 1 || i == 3 || s->mb_x)
1992 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1993
1994 ret = vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1995 (i & 4) ? v->codingset2 : v->codingset);
1996 if (ret < 0)
1997 return ret;
1998 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1999 continue;
2000 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2001 if (v->rangeredfrm)
2002 for (j = 0; j < 64; j++)
2003 s->block[i][j] *= 2;
2004 s->idsp.put_signed_pixels_clamped(s->block[i],
2005 s->dest[dst_idx] + off,
2006 i & 4 ? s->uvlinesize
2007 : s->linesize);
2008 } else if (val) {
2009 int pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2010 first_block, s->dest[dst_idx] + off,
2011 (i & 4) ? s->uvlinesize : s->linesize,
2012 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2013 if (pat < 0)
2014 return pat;
2015 if (!v->ttmbf && ttmb < 8)
2016 ttmb = -1;
2017 first_block = 0;
2018 }
2019 }
2020 return 0;
2021 }
2022
2023 /** Decode one B-frame MB (in interlaced field B picture)
2024 */
2025 static int vc1_decode_b_mb_intfi(VC1Context *v)
2026 {
2027 MpegEncContext *s = &v->s;
2028 GetBitContext *gb = &s->gb;
2029 int i, j;
2030 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2031 int cbp = 0; /* cbp decoding stuff */
2032 int mqdiff, mquant; /* MB quantization */
2033 int ttmb = v->ttfrm; /* MB Transform type */
2034 int mb_has_coeffs = 0; /* last_flag */
2035 int val; /* temp value */
2036 int first_block = 1;
2037 int dst_idx, off;
2038 int fwd;
2039 int dmv_x[2], dmv_y[2], pred_flag[2];
2040 int bmvtype = BMV_TYPE_BACKWARD;
2041 int block_cbp = 0, pat, block_tt = 0;
2042 int idx_mbmode;
2043 int ret;
2044
2045 mquant = v->pq; /* Lossy initialization */
2046 s->mb_intra = 0;
2047
2048 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2049 if (idx_mbmode <= 1) { // intra MB
2050 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2051 s->mb_intra = 1;
2052 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2053 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2054 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2055 GET_MQUANT();
2056 s->current_picture.qscale_table[mb_pos] = mquant;
2057 /* Set DC scale - y and c use the same (not sure if necessary here) */
2058 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2059 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2060 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2061 mb_has_coeffs = idx_mbmode & 1;
2062 if (mb_has_coeffs)
2063 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2064 dst_idx = 0;
2065 for (i = 0; i < 6; i++) {
2066 v->a_avail = v->c_avail = 0;
2067 v->mb_type[0][s->block_index[i]] = 1;
2068 s->dc_val[0][s->block_index[i]] = 0;
2069 dst_idx += i >> 2;
2070 val = ((cbp >> (5 - i)) & 1);
2071 if (i == 2 || i == 3 || !s->first_slice_line)
2072 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2073 if (i == 1 || i == 3 || s->mb_x)
2074 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2075
2076 ret = vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2077 (i & 4) ? v->codingset2 : v->codingset);
2078 if (ret < 0)
2079 return ret;
2080 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2081 continue;
2082 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2083 if (v->rangeredfrm)
2084 for (j = 0; j < 64; j++)
2085 s->block[i][j] <<= 1;
2086 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2087 s->idsp.put_signed_pixels_clamped(s->block[i],
2088 s->dest[dst_idx] + off,
2089 (i & 4) ? s->uvlinesize
2090 : s->linesize);
2091 }
2092 } else {
2093 s->mb_intra = v->is_intra[s->mb_x] = 0;
2094 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2095 for (i = 0; i < 6; i++)
2096 v->mb_type[0][s->block_index[i]] = 0;
2097 if (v->fmb_is_raw)
2098 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2099 else
2100 fwd = v->forward_mb_plane[mb_pos];
2101 if (idx_mbmode <= 5) { // 1-MV
2102 int interpmvp = 0;
2103 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2104 pred_flag[0] = pred_flag[1] = 0;
2105 if (fwd)
2106 bmvtype = BMV_TYPE_FORWARD;
2107 else {
2108 bmvtype = decode012(gb);
2109 switch (bmvtype) {
2110 case 0:
2111 bmvtype = BMV_TYPE_BACKWARD;
2112 break;
2113 case 1:
2114 bmvtype = BMV_TYPE_DIRECT;
2115 break;
2116 case 2:
2117 bmvtype = BMV_TYPE_INTERPOLATED;
2118 interpmvp = get_bits1(gb);
2119 }
2120 }
2121 v->bmvtype = bmvtype;
2122 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2123 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2124 }
2125 if (interpmvp) {
2126 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2127 }
2128 if (bmvtype == BMV_TYPE_DIRECT) {
2129 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2130 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2131 if (!s->next_picture_ptr->field_picture) {
2132 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2133 return AVERROR_INVALIDDATA;
2134 }
2135 }
2136 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2137 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2138 mb_has_coeffs = !(idx_mbmode & 2);
2139 } else { // 4-MV
2140 if (fwd)
2141 bmvtype = BMV_TYPE_FORWARD;
2142 v->bmvtype = bmvtype;
2143 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2144 for (i = 0; i < 4; i++) {
2145 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2146 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2147 if (v->fourmvbp & (8 >> i)) {
2148 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2149 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2150 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2151 }
2152 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2153 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2154 }
2155 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2156 mb_has_coeffs = idx_mbmode & 1;
2157 }
2158 if (mb_has_coeffs)
2159 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2160 if (cbp) {
2161 GET_MQUANT();
2162 }
2163 s->current_picture.qscale_table[mb_pos] = mquant;
2164 if (!v->ttmbf && cbp) {
2165 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2166 }
2167 dst_idx = 0;
2168 for (i = 0; i < 6; i++) {
2169 s->dc_val[0][s->block_index[i]] = 0;
2170 dst_idx += i >> 2;
2171 val = ((cbp >> (5 - i)) & 1);
2172 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2173 if (val) {
2174 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2175 first_block, s->dest[dst_idx] + off,
2176 (i & 4) ? s->uvlinesize : s->linesize,
2177 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2178 if (pat < 0)
2179 return pat;
2180 block_cbp |= pat << (i << 2);
2181 if (!v->ttmbf && ttmb < 8)
2182 ttmb = -1;
2183 first_block = 0;
2184 }
2185 }
2186 }
2187 v->cbp[s->mb_x] = block_cbp;
2188 v->ttblk[s->mb_x] = block_tt;
2189
2190 return 0;
2191 }
2192
2193 /** Decode one B-frame MB (in interlaced frame B picture)
2194 */
2195 static int vc1_decode_b_mb_intfr(VC1Context *v)
2196 {
2197 MpegEncContext *s = &v->s;
2198 GetBitContext *gb = &s->gb;
2199 int i, j;
2200 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2201 int cbp = 0; /* cbp decoding stuff */
2202 int mqdiff, mquant; /* MB quantization */
2203 int ttmb = v->ttfrm; /* MB Transform type */
2204 int mvsw = 0; /* motion vector switch */
2205 int mb_has_coeffs = 1; /* last_flag */
2206 int dmv_x, dmv_y; /* Differential MV components */
2207 int val; /* temp value */
2208 int first_block = 1;
2209 int dst_idx, off;
2210 int skipped, direct, twomv = 0;
2211 int block_cbp = 0, pat, block_tt = 0;
2212 int idx_mbmode = 0, mvbp;
2213 int stride_y, fieldtx;
2214 int bmvtype = BMV_TYPE_BACKWARD;
2215 int dir, dir2;
2216 int ret;
2217
2218 mquant = v->pq; /* Lossy initialization */
2219 s->mb_intra = 0;
2220 if (v->skip_is_raw)
2221 skipped = get_bits1(gb);
2222 else
2223 skipped = v->s.mbskip_table[mb_pos];
2224
2225 if (!skipped) {
2226 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2227 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2228 twomv = 1;
2229 v->blk_mv_type[s->block_index[0]] = 1;
2230 v->blk_mv_type[s->block_index[1]] = 1;
2231 v->blk_mv_type[s->block_index[2]] = 1;
2232 v->blk_mv_type[s->block_index[3]] = 1;
2233 } else {
2234 v->blk_mv_type[s->block_index[0]] = 0;
2235 v->blk_mv_type[s->block_index[1]] = 0;
2236 v->blk_mv_type[s->block_index[2]] = 0;
2237 v->blk_mv_type[s->block_index[3]] = 0;
2238 }
2239 }
2240
2241 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2242 for (i = 0; i < 4; i++) {
2243 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2244 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2245 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2246 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2247 }
2248 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2249 s->mb_intra = 1;
2250 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2251 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2252 mb_has_coeffs = get_bits1(gb);
2253 if (mb_has_coeffs)
2254 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2255 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2256 GET_MQUANT();
2257 s->current_picture.qscale_table[mb_pos] = mquant;
2258 /* Set DC scale - y and c use the same (not sure if necessary here) */
2259 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2260 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2261 dst_idx = 0;
2262 for (i = 0; i < 6; i++) {
2263 v->a_avail = v->c_avail = 0;
2264 v->mb_type[0][s->block_index[i]] = 1;
2265 s->dc_val[0][s->block_index[i]] = 0;
2266 dst_idx += i >> 2;
2267 val = ((cbp >> (5 - i)) & 1);
2268 if (i == 2 || i == 3 || !s->first_slice_line)
2269 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2270 if (i == 1 || i == 3 || s->mb_x)
2271 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2272
2273 ret = vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2274 (i & 4) ? v->codingset2 : v->codingset);
2275 if (ret < 0)
2276 return ret;
2277 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2278 continue;
2279 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2280 if (i < 4) {
2281 stride_y = s->linesize << fieldtx;
2282 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2283 } else {
2284 stride_y = s->uvlinesize;
2285 off = 0;
2286 }
2287 s->idsp.put_signed_pixels_clamped(s->block[i],
2288 s->dest[dst_idx] + off,
2289 stride_y);
2290 }
2291 } else {
2292 s->mb_intra = v->is_intra[s->mb_x] = 0;
2293
2294 if (v->dmb_is_raw)
2295 direct = get_bits1(gb);
2296 else
2297 direct = v->direct_mb_plane[mb_pos];
2298
2299 if (direct) {
2300 if (s->next_picture_ptr->field_picture)
2301 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2302 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);
2303 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);
2304 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);
2305 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);
2306
2307 if (twomv) {
2308 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);
2309 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);
2310 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);
2311 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);
2312
2313 for (i = 1; i < 4; i += 2) {
2314 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2315 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2316 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2317 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2318 }
2319 } else {
2320 for (i = 1; i < 4; i++) {
2321 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2322 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2323 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2324 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2325 }
2326 }
2327 }
2328
2329 if (!direct) {
2330 if (skipped || !s->mb_intra) {
2331 bmvtype = decode012(gb);
2332 switch (bmvtype) {
2333 case 0:
2334 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2335 break;
2336 case 1:
2337 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2338 break;
2339 case 2:
2340 bmvtype = BMV_TYPE_INTERPOLATED;
2341 }
2342 }
2343
2344 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2345 mvsw = get_bits1(gb);
2346 }
2347
2348 if (!skipped) { // inter MB
2349 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2350 if (mb_has_coeffs)
2351 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2352 if (!direct) {
2353 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2354 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2355 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2356 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2357 }
2358 }
2359
2360 for (i = 0; i < 6; i++)
2361 v->mb_type[0][s->block_index[i]] = 0;
2362 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2363 /* for all motion vector read MVDATA and motion compensate each block */
2364 dst_idx = 0;
2365 if (direct) {
2366 if (twomv) {
2367 for (i = 0; i < 4; i++) {
2368 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2369 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2370 }
2371 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2372 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2373 } else {
2374 ff_vc1_mc_1mv(v, 0);
2375 ff_vc1_interp_mc(v);
2376 }
2377 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2378 mvbp = v->fourmvbp;
2379 for (i = 0; i < 4; i++) {
2380 dir = i==1 || i==3;
2381 dmv_x = dmv_y = 0;
2382 val = ((mvbp >> (3 - i)) & 1);
2383 if (val)
2384 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2385 j = i > 1 ? 2 : 0;
2386 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir);
2387 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2388 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2389 }
2390
2391 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2392 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2393 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2394 mvbp = v->twomvbp;
2395 dmv_x = dmv_y = 0;
2396 if (mvbp & 2)
2397 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2398
2399 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 0);
2400 ff_vc1_mc_1mv(v, 0);
2401
2402 dmv_x = dmv_y = 0;
2403 if (mvbp & 1)
2404 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2405
2406 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 1);
2407 ff_vc1_interp_mc(v);
2408 } else if (twomv) {
2409 dir = bmvtype == BMV_TYPE_BACKWARD;
2410 dir2 = dir;
2411 if (mvsw)
2412 dir2 = !dir;
2413 mvbp = v->twomvbp;
2414 dmv_x = dmv_y = 0;
2415 if (mvbp & 2)
2416 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2417 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir);
2418
2419 dmv_x = dmv_y = 0;
2420 if (mvbp & 1)
2421 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2422 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, dir2);
2423
2424 if (mvsw) {
2425 for (i = 0; i < 2; i++) {
2426 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];
2427 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];
2428 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];
2429 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];
2430 }
2431 } else {
2432 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2433 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, !dir);
2434 }
2435
2436 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2437 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2438 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2439 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2440 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2441 } else {
2442 dir = bmvtype == BMV_TYPE_BACKWARD;
2443
2444 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2445 dmv_x = dmv_y = 0;
2446 if (mvbp)
2447 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2448
2449 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, dir);
2450 v->blk_mv_type[s->block_index[0]] = 1;
2451 v->blk_mv_type[s->block_index[1]] = 1;
2452 v->blk_mv_type[s->block_index[2]] = 1;
2453 v->blk_mv_type[s->block_index[3]] = 1;
2454 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2455 for (i = 0; i < 2; i++) {
2456 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];
2457 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];
2458 }
2459 ff_vc1_mc_1mv(v, dir);
2460 }
2461
2462 if (cbp)
2463 GET_MQUANT(); // p. 227
2464 s->current_picture.qscale_table[mb_pos] = mquant;
2465 if (!v->ttmbf && cbp)
2466 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2467 for (i = 0; i < 6; i++) {
2468 s->dc_val[0][s->block_index[i]] = 0;
2469 dst_idx += i >> 2;
2470 val = ((cbp >> (5 - i)) & 1);
2471 if (!fieldtx)
2472 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2473 else
2474 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2475 if (val) {
2476 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2477 first_block, s->dest[dst_idx] + off,
2478 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2479 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2480 if (pat < 0)
2481 return pat;
2482 block_cbp |= pat << (i << 2);
2483 if (!v->ttmbf && ttmb < 8)
2484 ttmb = -1;
2485 first_block = 0;
2486 }
2487 }
2488
2489 } else { // skipped
2490 dir = 0;
2491 for (i = 0; i < 6; i++) {
2492 v->mb_type[0][s->block_index[i]] = 0;
2493 s->dc_val[0][s->block_index[i]] = 0;
2494 }
2495 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2496 s->current_picture.qscale_table[mb_pos] = 0;
2497 v->blk_mv_type[s->block_index[0]] = 0;
2498 v->blk_mv_type[s->block_index[1]] = 0;
2499 v->blk_mv_type[s->block_index[2]] = 0;
2500 v->blk_mv_type[s->block_index[3]] = 0;
2501
2502 if (!direct) {
2503 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2504 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 0);
2505 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 1);
2506 } else {
2507 dir = bmvtype == BMV_TYPE_BACKWARD;
2508 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, dir);
2509 if (mvsw) {
2510 int dir2 = dir;
2511 if (mvsw)
2512 dir2 = !dir;
2513 for (i = 0; i < 2; i++) {
2514 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];
2515 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];
2516 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];
2517 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];
2518 }
2519 } else {
2520 v->blk_mv_type[s->block_index[0]] = 1;
2521 v->blk_mv_type[s->block_index[1]] = 1;
2522 v->blk_mv_type[s->block_index[2]] = 1;
2523 v->blk_mv_type[s->block_index[3]] = 1;
2524 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, !dir);
2525 for (i = 0; i < 2; i++) {
2526 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];
2527 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];
2528 }
2529 }
2530 }
2531 }
2532
2533 ff_vc1_mc_1mv(v, dir);
2534 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2535 ff_vc1_interp_mc(v);
2536 }
2537 v->fieldtx_plane[mb_pos] = 0;
2538 }
2539 }
2540 v->cbp[s->mb_x] = block_cbp;
2541 v->ttblk[s->mb_x] = block_tt;
2542
2543 return 0;
2544 }
2545
2546 /** Decode blocks of I-frame
2547 */
2548 static void vc1_decode_i_blocks(VC1Context *v)
2549 {
2550 int k, j;
2551 MpegEncContext *s = &v->s;
2552 int cbp, val;
2553 uint8_t *coded_val;
2554 int mb_pos;
2555
2556 /* select coding mode used for VLC tables selection */
2557 switch (v->y_ac_table_index) {
2558 case 0:
2559 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2560 break;
2561 case 1:
2562 v->codingset = CS_HIGH_MOT_INTRA;
2563 break;
2564 case 2:
2565 v->codingset = CS_MID_RATE_INTRA;
2566 break;
2567 }
2568
2569 switch (v->c_ac_table_index) {
2570 case 0:
2571 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2572 break;
2573 case 1:
2574 v->codingset2 = CS_HIGH_MOT_INTER;
2575 break;
2576 case 2:
2577 v->codingset2 = CS_MID_RATE_INTER;
2578 break;
2579 }
2580
2581 /* Set DC scale - y and c use the same */
2582 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2583 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2584
2585 //do frame decode
2586 s->mb_x = s->mb_y = 0;
2587 s->mb_intra = 1;
2588 s->first_slice_line = 1;
2589 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2590 s->mb_x = 0;
2591 init_block_index(v);
2592 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2593 ff_update_block_index(s);
2594 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2595 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2596 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2597 s->current_picture.qscale_table[mb_pos] = v->pq;
2598 for (int i = 0; i < 4; i++) {
2599 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2600 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2601 }
2602
2603 // do actual MB decoding and displaying
2604 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2605 v->s.ac_pred = get_bits1(&v->s.gb);
2606
2607 for (k = 0; k < 6; k++) {
2608 v->mb_type[0][s->block_index[k]] = 1;
2609
2610 val = ((cbp >> (5 - k)) & 1);
2611
2612 if (k < 4) {
2613 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2614 val = val ^ pred;
2615 *coded_val = val;
2616 }
2617 cbp |= val << (5 - k);
2618
2619 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2620
2621 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2622 continue;
2623 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2624 }
2625
2626 if (v->overlap && v->pq >= 9) {
2627 ff_vc1_i_overlap_filter(v);
2628 if (v->rangeredfrm)
2629 for (k = 0; k < 6; k++)
2630 for (j = 0; j < 64; j++)
2631 v->block[v->cur_blk_idx][block_map[k]][j] *= 2;
2632 vc1_put_blocks_clamped(v, 1);
2633 } else {
2634 if (v->rangeredfrm)
2635 for (k = 0; k < 6; k++)
2636 for (j = 0; j < 64; j++)
2637 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2;
2638 vc1_put_blocks_clamped(v, 0);
2639 }
2640
2641 if (v->s.loop_filter)
2642 ff_vc1_i_loop_filter(v);
2643
2644 if (get_bits_left(&s->gb) < 0) {
2645 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2646 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2647 get_bits_count(&s->gb), s->gb.size_in_bits);
2648 return;
2649 }
2650
2651 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2652 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2653 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2654 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2655 }
2656 if (!v->s.loop_filter)
2657 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2658 else if (s->mb_y)
2659 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2660
2661 s->first_slice_line = 0;
2662 }
2663 if (v->s.loop_filter)
2664 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2665
2666 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2667 * profile, these only differ are when decoding MSS2 rectangles. */
2668 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2669 }
2670
2671 /** Decode blocks of I-frame for advanced profile
2672 */
2673 static int vc1_decode_i_blocks_adv(VC1Context *v)
2674 {
2675 int k;
2676 MpegEncContext *s = &v->s;
2677 int cbp, val;
2678 uint8_t *coded_val;
2679 int mb_pos;
2680 int mquant;
2681 int mqdiff;
2682 GetBitContext *gb = &s->gb;
2683
2684 if (get_bits_left(gb) <= 1)
2685 return AVERROR_INVALIDDATA;
2686
2687 /* select coding mode used for VLC tables selection */
2688 switch (v->y_ac_table_index) {
2689 case 0:
2690 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2691 break;
2692 case 1:
2693 v->codingset = CS_HIGH_MOT_INTRA;
2694 break;
2695 case 2:
2696 v->codingset = CS_MID_RATE_INTRA;
2697 break;
2698 }
2699
2700 switch (v->c_ac_table_index) {
2701 case 0:
2702 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2703 break;
2704 case 1:
2705 v->codingset2 = CS_HIGH_MOT_INTER;
2706 break;
2707 case 2:
2708 v->codingset2 = CS_MID_RATE_INTER;
2709 break;
2710 }
2711
2712 // do frame decode
2713 s->mb_x = s->mb_y = 0;
2714 s->mb_intra = 1;
2715 s->first_slice_line = 1;
2716 s->mb_y = s->start_mb_y;
2717 if (s->start_mb_y) {
2718 s->mb_x = 0;
2719 init_block_index(v);
2720 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2721 (1 + s->b8_stride) * sizeof(*s->coded_block));
2722 }
2723 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2724 s->mb_x = 0;
2725 init_block_index(v);
2726 for (;s->mb_x < s->mb_width; s->mb_x++) {
2727 mquant = v->pq;
2728 ff_update_block_index(s);
2729 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2730 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2731 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2732 for (int i = 0; i < 4; i++) {
2733 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2734 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2735 }
2736
2737 // do actual MB decoding and displaying
2738 if (v->fieldtx_is_raw)
2739 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2740 if (get_bits_left(&v->s.gb) <= 1) {
2741 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2742 return 0;
2743 }
2744
2745 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2746 if (v->acpred_is_raw)
2747 v->s.ac_pred = get_bits1(&v->s.gb);
2748 else
2749 v->s.ac_pred = v->acpred_plane[mb_pos];
2750
2751 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2752 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2753
2754 GET_MQUANT();
2755
2756 s->current_picture.qscale_table[mb_pos] = mquant;
2757 /* Set DC scale - y and c use the same */
2758 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2759 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2760
2761 for (k = 0; k < 6; k++) {
2762 v->mb_type[0][s->block_index[k]] = 1;
2763
2764 val = ((cbp >> (5 - k)) & 1);
2765
2766 if (k < 4) {
2767 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2768 val = val ^ pred;
2769 *coded_val = val;
2770 }
2771 cbp |= val << (5 - k);
2772
2773 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2774 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2775
2776 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2777 (k < 4) ? v->codingset : v->codingset2, mquant);
2778
2779 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2780 continue;
2781 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2782 }
2783
2784 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2785 ff_vc1_i_overlap_filter(v);
2786 vc1_put_blocks_clamped(v, 1);
2787 if (v->s.loop_filter)
2788 ff_vc1_i_loop_filter(v);
2789
2790 if (get_bits_left(&s->gb) < 0) {
2791 // TODO: may need modification to handle slice coding
2792 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2793 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2794 get_bits_count(&s->gb), s->gb.size_in_bits);
2795 return 0;
2796 }
2797 inc_blk_idx(v->topleft_blk_idx);
2798 inc_blk_idx(v->top_blk_idx);
2799 inc_blk_idx(v->left_blk_idx);
2800 inc_blk_idx(v->cur_blk_idx);
2801 }
2802 if (!v->s.loop_filter)
2803 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2804 else if (s->mb_y)
2805 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2806 s->first_slice_line = 0;
2807 }
2808
2809 if (v->s.loop_filter)
2810 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2811 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2812 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2813 return 0;
2814 }
2815
2816 static void vc1_decode_p_blocks(VC1Context *v)
2817 {
2818 MpegEncContext *s = &v->s;
2819 int apply_loop_filter;
2820 int ret;
2821
2822 /* select coding mode used for VLC tables selection */
2823 switch (v->c_ac_table_index) {
2824 case 0:
2825 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2826 break;
2827 case 1:
2828 v->codingset = CS_HIGH_MOT_INTRA;
2829 break;
2830 case 2:
2831 v->codingset = CS_MID_RATE_INTRA;
2832 break;
2833 }
2834
2835 switch (v->c_ac_table_index) {
2836 case 0:
2837 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2838 break;
2839 case 1:
2840 v->codingset2 = CS_HIGH_MOT_INTER;
2841 break;
2842 case 2:
2843 v->codingset2 = CS_MID_RATE_INTER;
2844 break;
2845 }
2846
2847 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2848 s->first_slice_line = 1;
2849 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2850 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2851 s->mb_x = 0;
2852 init_block_index(v);
2853 for (; s->mb_x < s->mb_width; s->mb_x++) {
2854 ff_update_block_index(s);
2855
2856 if (v->fcm == ILACE_FIELD || (v->fcm == PROGRESSIVE && v->mv_type_is_raw) || v->skip_is_raw)
2857 if (get_bits_left(&v->s.gb) <= 1) {
2858 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2859 return;
2860 }
2861
2862 if (v->fcm == ILACE_FIELD) {
2863 ret = vc1_decode_p_mb_intfi(v);
2864 if (apply_loop_filter)
2865 ff_vc1_p_loop_filter(v);
2866 } else if (v->fcm == ILACE_FRAME) {
2867 ret = vc1_decode_p_mb_intfr(v);
2868 if (apply_loop_filter)
2869 ff_vc1_p_intfr_loop_filter(v);
2870 } else {
2871 ret = vc1_decode_p_mb(v);
2872 if (apply_loop_filter)
2873 ff_vc1_p_loop_filter(v);
2874 }
2875 if (ret < 0 || get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2876 // TODO: may need modification to handle slice coding
2877 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2878 av_log(s->avctx, AV_LOG_ERROR, "Error or Bits overconsumption: %i > %i at %ix%i\n",
2879 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2880 return;
2881 }
2882 inc_blk_idx(v->topleft_blk_idx);
2883 inc_blk_idx(v->top_blk_idx);
2884 inc_blk_idx(v->left_blk_idx);
2885 inc_blk_idx(v->cur_blk_idx);
2886 }
2887 memmove(v->cbp_base,
2888 v->cbp - s->mb_stride,
2889 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2890 memmove(v->ttblk_base,
2891 v->ttblk - s->mb_stride,
2892 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2893 memmove(v->is_intra_base,
2894 v->is_intra - s->mb_stride,
2895 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2896 memmove(v->luma_mv_base,
2897 v->luma_mv - s->mb_stride,
2898 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2899 if (s->mb_y != s->start_mb_y)
2900 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2901 s->first_slice_line = 0;
2902 }
2903 if (s->end_mb_y >= s->start_mb_y)
2904 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2905 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2906 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2907 }
2908
2909 static void vc1_decode_b_blocks(VC1Context *v)
2910 {
2911 MpegEncContext *s = &v->s;
2912
2913 /* select coding mode used for VLC tables selection */
2914 switch (v->c_ac_table_index) {
2915 case 0:
2916 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2917 break;
2918 case 1:
2919 v->codingset = CS_HIGH_MOT_INTRA;
2920 break;
2921 case 2:
2922 v->codingset = CS_MID_RATE_INTRA;
2923 break;
2924 }
2925
2926 switch (v->c_ac_table_index) {
2927 case 0:
2928 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2929 break;
2930 case 1:
2931 v->codingset2 = CS_HIGH_MOT_INTER;
2932 break;
2933 case 2:
2934 v->codingset2 = CS_MID_RATE_INTER;
2935 break;
2936 }
2937
2938 s->first_slice_line = 1;
2939 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2940 s->mb_x = 0;
2941 init_block_index(v);
2942 for (; s->mb_x < s->mb_width; s->mb_x++) {
2943 ff_update_block_index(s);
2944
2945 if (v->fcm == ILACE_FIELD || v->skip_is_raw || v->dmb_is_raw)
2946 if (get_bits_left(&v->s.gb) <= 1) {
2947 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2948 return;
2949 }
2950
2951 if (v->fcm == ILACE_FIELD) {
2952 vc1_decode_b_mb_intfi(v);
2953 if (v->s.loop_filter)
2954 ff_vc1_b_intfi_loop_filter(v);
2955 } else if (v->fcm == ILACE_FRAME) {
2956 vc1_decode_b_mb_intfr(v);
2957 if (v->s.loop_filter)
2958 ff_vc1_p_intfr_loop_filter(v);
2959 } else {
2960 vc1_decode_b_mb(v);
2961 if (v->s.loop_filter)
2962 ff_vc1_i_loop_filter(v);
2963 }
2964 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2965 // TODO: may need modification to handle slice coding
2966 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2967 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2968 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2969 return;
2970 }
2971 }
2972 memmove(v->cbp_base,
2973 v->cbp - s->mb_stride,
2974 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2975 memmove(v->ttblk_base,
2976 v->ttblk - s->mb_stride,
2977 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2978 memmove(v->is_intra_base,
2979 v->is_intra - s->mb_stride,
2980 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2981 if (!v->s.loop_filter)
2982 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2983 else if (s->mb_y)
2984 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2985 s->first_slice_line = 0;
2986 }
2987 if (v->s.loop_filter)
2988 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2989 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2990 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2991 }
2992
2993 static void vc1_decode_skip_blocks(VC1Context *v)
2994 {
2995 MpegEncContext *s = &v->s;
2996
2997 if (!v->s.last_picture.f->data[0])
2998 return;
2999
3000 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
3001 s->first_slice_line = 1;
3002 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
3003 s->mb_x = 0;
3004 init_block_index(v);
3005 ff_update_block_index(s);
3006 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
3007 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3008 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3009 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
3010 s->first_slice_line = 0;
3011 }
3012 s->pict_type = AV_PICTURE_TYPE_P;
3013 }
3014
3015 void ff_vc1_decode_blocks(VC1Context *v)
3016 {
3017
3018 v->s.esc3_level_length = 0;
3019 if (v->x8_type) {
3020 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
3021 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
3022 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
3023 v->s.loop_filter, v->s.low_delay);
3024
3025 ff_er_add_slice(&v->s.er, 0, 0,
3026 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
3027 ER_MB_END);
3028 } else {
3029 v->cur_blk_idx = 0;
3030 v->left_blk_idx = -1;
3031 v->topleft_blk_idx = 1;
3032 v->top_blk_idx = 2;
3033 switch (v->s.pict_type) {
3034 case AV_PICTURE_TYPE_I:
3035 if (v->profile == PROFILE_ADVANCED)
3036 vc1_decode_i_blocks_adv(v);
3037 else
3038 vc1_decode_i_blocks(v);
3039 break;
3040 case AV_PICTURE_TYPE_P:
3041 if (v->p_frame_skipped)
3042 vc1_decode_skip_blocks(v);
3043 else
3044 vc1_decode_p_blocks(v);
3045 break;
3046 case AV_PICTURE_TYPE_B:
3047 if (v->bi_type) {
3048 if (v->profile == PROFILE_ADVANCED)
3049 vc1_decode_i_blocks_adv(v);
3050 else
3051 vc1_decode_i_blocks(v);
3052 } else
3053 vc1_decode_b_blocks(v);
3054 break;
3055 }
3056 }
3057 }
FFmpeg git repo