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
7 * This file is part of FFmpeg.
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.
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.
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
26 * VC-1 and WMV3 block decoding routines
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "msmpeg4data.h"
36 #include "vc1acdata.h"
39 #define MB_INTRA_VLC_BITS 9
42 // offset tables for interlaced picture MVDATA decoding
43 static const uint8_t offset_table[2][9] = {
44 { 0, 1, 2, 4, 8, 16, 32, 64, 128 },
45 { 0, 1, 3, 7, 15, 31, 63, 127, 255 },
48 // mapping table for internal block representation
49 static const int block_map[6] = {0, 2, 1, 3, 4, 5};
51 /***********************************************************************/
53 * @name VC-1 Bitplane decoding
59 static inline void init_block_index(VC1Context *v)
61 MpegEncContext *s = &v->s;
62 ff_init_block_index(s);
63 if (v->field_mode && !(v->second_field ^ v->tff)) {
64 s->dest[0] += s->current_picture_ptr->f->linesize[0];
65 s->dest[1] += s->current_picture_ptr->f->linesize[1];
66 s->dest[2] += s->current_picture_ptr->f->linesize[2];
70 /** @} */ //Bitplane group
72 static void vc1_put_blocks_clamped(VC1Context *v, int put_signed)
74 MpegEncContext *s = &v->s;
76 int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
80 /* The put pixels loop is one MB row and one MB column behind the decoding
81 * loop because we can only put pixels when overlap filtering is done. For
82 * interlaced frame pictures, however, the put pixels loop is only one
83 * column behind the decoding loop as interlaced frame pictures only need
84 * horizontal overlap filtering. */
85 if (!s->first_slice_line && v->fcm != ILACE_FRAME) {
87 for (i = 0; i < block_count; i++) {
88 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i] - 1] :
89 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i] - 2]) {
90 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + ((i & 1) - 2) * 8;
92 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
93 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
94 i > 3 ? s->uvlinesize : s->linesize);
96 s->idsp.put_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
97 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
98 i > 3 ? s->uvlinesize : s->linesize);
102 if (s->mb_x == v->end_mb_x - 1) {
103 for (i = 0; i < block_count; i++) {
104 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i]] :
105 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i]]) {
106 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + (i & 1) * 8;
108 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
109 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
110 i > 3 ? s->uvlinesize : s->linesize);
112 s->idsp.put_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
113 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
114 i > 3 ? s->uvlinesize : s->linesize);
119 if (s->mb_y == s->end_mb_y - 1 || v->fcm == ILACE_FRAME) {
121 if (v->fcm == ILACE_FRAME)
122 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x - 1];
123 for (i = 0; i < block_count; i++) {
124 if (i > 3 ? v->mb_type[0][s->block_index[i] - 1] :
125 v->mb_type[0][s->block_index[i] - 2]) {
127 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + ((i & 1) - 2) * 8;
129 dest = s->dest[0] + (i & 2) * 4 * s->linesize + ((i & 1) - 2) * 8;
131 s->idsp.put_signed_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
132 i > 3 ? s->dest[i - 3] - 8 : dest,
133 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
135 s->idsp.put_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
136 i > 3 ? s->dest[i - 3] - 8 : dest,
137 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
141 if (s->mb_x == v->end_mb_x - 1) {
142 if (v->fcm == ILACE_FRAME)
143 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x];
144 for (i = 0; i < block_count; i++) {
145 if (v->mb_type[0][s->block_index[i]]) {
147 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + (i & 1) * 8;
149 dest = s->dest[0] + (i & 2) * 4 * s->linesize + (i & 1) * 8;
151 s->idsp.put_signed_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
152 i > 3 ? s->dest[i - 3] : dest,
153 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
155 s->idsp.put_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
156 i > 3 ? s->dest[i - 3] : dest,
157 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
164 #define inc_blk_idx(idx) do { \
166 if (idx >= v->n_allocated_blks) \
170 /***********************************************************************/
172 * @name VC-1 Block-level functions
173 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
179 * @brief Get macroblock-level quantizer scale
181 #define GET_MQUANT() \
182 if (v->dquantfrm) { \
184 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
185 if (v->dqbilevel) { \
186 mquant = (get_bits1(gb)) ? -v->altpq : v->pq; \
188 mqdiff = get_bits(gb, 3); \
190 mquant = -v->pq - mqdiff; \
192 mquant = -get_bits(gb, 5); \
195 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
196 edges = 1 << v->dqsbedge; \
197 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
198 edges = (3 << v->dqsbedge) % 15; \
199 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
201 if ((edges&1) && !s->mb_x) \
202 mquant = -v->altpq; \
203 if ((edges&2) && !s->mb_y) \
204 mquant = -v->altpq; \
205 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
206 mquant = -v->altpq; \
208 s->mb_y == ((s->mb_height >> v->field_mode) - 1)) \
209 mquant = -v->altpq; \
210 if (!mquant || mquant > 31 || mquant < -31) { \
211 av_log(v->s.avctx, AV_LOG_ERROR, \
212 "Overriding invalid mquant %d\n", mquant); \
218 * @def GET_MVDATA(_dmv_x, _dmv_y)
219 * @brief Get MV differentials
220 * @see MVDATA decoding from 8.3.5.2, p(1)20
221 * @param _dmv_x Horizontal differential for decoded MV
222 * @param _dmv_y Vertical differential for decoded MV
224 #define GET_MVDATA(_dmv_x, _dmv_y) \
225 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
226 VC1_MV_DIFF_VLC_BITS, 2); \
234 _dmv_x = _dmv_y = 0; \
235 } else if (index == 35) { \
236 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
237 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
238 } else if (index == 36) { \
243 index1 = index % 6; \
244 _dmv_x = offset_table[1][index1]; \
245 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
247 val = get_bits(gb, val); \
248 sign = 0 - (val & 1); \
249 _dmv_x = (sign ^ ((val >> 1) + _dmv_x)) - sign; \
252 index1 = index / 6; \
253 _dmv_y = offset_table[1][index1]; \
254 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
256 val = get_bits(gb, val); \
257 sign = 0 - (val & 1); \
258 _dmv_y = (sign ^ ((val >> 1) + _dmv_y)) - sign; \
262 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
263 int *dmv_y, int *pred_flag)
266 int extend_x, extend_y;
267 GetBitContext *gb = &v->s.gb;
272 bits = VC1_2REF_MVDATA_VLC_BITS;
275 bits = VC1_1REF_MVDATA_VLC_BITS;
278 extend_x = v->dmvrange & 1;
279 extend_y = (v->dmvrange >> 1) & 1;
280 index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
282 *dmv_x = get_bits(gb, v->k_x);
283 *dmv_y = get_bits(gb, v->k_y);
286 *pred_flag = *dmv_y & 1;
287 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
291 av_assert0(index < esc);
292 index1 = (index + 1) % 9;
294 val = get_bits(gb, index1 + extend_x);
295 sign = 0 - (val & 1);
296 *dmv_x = (sign ^ ((val >> 1) + offset_table[extend_x][index1])) - sign;
299 index1 = (index + 1) / 9;
300 if (index1 > v->numref) {
301 val = get_bits(gb, (index1 >> v->numref) + extend_y);
302 sign = 0 - (val & 1);
303 *dmv_y = (sign ^ ((val >> 1) + offset_table[extend_y][index1 >> v->numref])) - sign;
306 if (v->numref && pred_flag)
307 *pred_flag = index1 & 1;
311 /** Reconstruct motion vector for B-frame and do motion compensation
313 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
314 int direct, int mode)
321 if (mode == BMV_TYPE_INTERPOLATED) {
327 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
330 /** Get predicted DC value for I-frames only
331 * prediction dir: left=0, top=1
332 * @param s MpegEncContext
333 * @param overlap flag indicating that overlap filtering is used
334 * @param pq integer part of picture quantizer
335 * @param[in] n block index in the current MB
336 * @param dc_val_ptr Pointer to DC predictor
337 * @param dir_ptr Prediction direction for use in AC prediction
339 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
340 int16_t **dc_val_ptr, int *dir_ptr)
342 int a, b, c, wrap, pred, scale;
344 static const uint16_t dcpred[32] = {
345 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
346 114, 102, 93, 85, 79, 73, 68, 64,
347 60, 57, 54, 51, 49, 47, 45, 43,
348 41, 39, 38, 37, 35, 34, 33
351 /* find prediction - wmv3_dc_scale always used here in fact */
352 if (n < 4) scale = s->y_dc_scale;
353 else scale = s->c_dc_scale;
355 wrap = s->block_wrap[n];
356 dc_val = s->dc_val[0] + s->block_index[n];
362 b = dc_val[ - 1 - wrap];
365 if (pq < 9 || !overlap) {
366 /* Set outer values */
367 if (s->first_slice_line && (n != 2 && n != 3))
368 b = a = dcpred[scale];
369 if (s->mb_x == 0 && (n != 1 && n != 3))
370 b = c = dcpred[scale];
372 /* Set outer values */
373 if (s->first_slice_line && (n != 2 && n != 3))
375 if (s->mb_x == 0 && (n != 1 && n != 3))
379 if (abs(a - b) <= abs(b - c)) {
381 *dir_ptr = 1; // left
387 /* update predictor */
388 *dc_val_ptr = &dc_val[0];
393 /** Get predicted DC value
394 * prediction dir: left=0, top=1
395 * @param s MpegEncContext
396 * @param overlap flag indicating that overlap filtering is used
397 * @param pq integer part of picture quantizer
398 * @param[in] n block index in the current MB
399 * @param a_avail flag indicating top block availability
400 * @param c_avail flag indicating left block availability
401 * @param dc_val_ptr Pointer to DC predictor
402 * @param dir_ptr Prediction direction for use in AC prediction
404 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
405 int a_avail, int c_avail,
406 int16_t **dc_val_ptr, int *dir_ptr)
408 int a, b, c, wrap, pred;
410 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
414 /* scale predictors if needed */
415 q1 = FFABS(s->current_picture.qscale_table[mb_pos]);
416 dqscale_index = s->y_dc_scale_table[q1] - 1;
417 if (dqscale_index < 0)
420 wrap = s->block_wrap[n];
421 dc_val = s->dc_val[0] + s->block_index[n];
427 b = dc_val[ - 1 - wrap];
430 if (c_avail && (n != 1 && n != 3)) {
431 q2 = FFABS(s->current_picture.qscale_table[mb_pos - 1]);
433 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
435 if (a_avail && (n != 2 && n != 3)) {
436 q2 = FFABS(s->current_picture.qscale_table[mb_pos - s->mb_stride]);
438 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
440 if (a_avail && c_avail && (n != 3)) {
446 q2 = FFABS(s->current_picture.qscale_table[off]);
448 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
451 if (c_avail && (!a_avail || abs(a - b) <= abs(b - c))) {
453 *dir_ptr = 1; // left
454 } else if (a_avail) {
459 *dir_ptr = 1; // left
462 /* update predictor */
463 *dc_val_ptr = &dc_val[0];
467 /** @} */ // Block group
470 * @name VC1 Macroblock-level functions in Simple/Main Profiles
471 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
475 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
476 uint8_t **coded_block_ptr)
478 int xy, wrap, pred, a, b, c;
480 xy = s->block_index[n];
486 a = s->coded_block[xy - 1 ];
487 b = s->coded_block[xy - 1 - wrap];
488 c = s->coded_block[xy - wrap];
497 *coded_block_ptr = &s->coded_block[xy];
503 * Decode one AC coefficient
504 * @param v The VC1 context
505 * @param last Last coefficient
506 * @param skip How much zero coefficients to skip
507 * @param value Decoded AC coefficient value
508 * @param codingset set of VLC to decode data
511 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
512 int *value, int codingset)
514 GetBitContext *gb = &v->s.gb;
515 int index, run, level, lst, sign;
517 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
518 if (index != ff_vc1_ac_sizes[codingset] - 1) {
519 run = vc1_index_decode_table[codingset][index][0];
520 level = vc1_index_decode_table[codingset][index][1];
521 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
522 sign = get_bits1(gb);
524 int escape = decode210(gb);
526 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
527 run = vc1_index_decode_table[codingset][index][0];
528 level = vc1_index_decode_table[codingset][index][1];
529 lst = index >= vc1_last_decode_table[codingset];
532 level += vc1_last_delta_level_table[codingset][run];
534 level += vc1_delta_level_table[codingset][run];
537 run += vc1_last_delta_run_table[codingset][level] + 1;
539 run += vc1_delta_run_table[codingset][level] + 1;
541 sign = get_bits1(gb);
544 if (v->s.esc3_level_length == 0) {
545 if (v->pq < 8 || v->dquantfrm) { // table 59
546 v->s.esc3_level_length = get_bits(gb, 3);
547 if (!v->s.esc3_level_length)
548 v->s.esc3_level_length = get_bits(gb, 2) + 8;
550 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
552 v->s.esc3_run_length = 3 + get_bits(gb, 2);
554 run = get_bits(gb, v->s.esc3_run_length);
555 sign = get_bits1(gb);
556 level = get_bits(gb, v->s.esc3_level_length);
562 *value = (level ^ -sign) + sign;
565 /** Decode intra block in intra frames - should be faster than decode_intra_block
566 * @param v VC1Context
567 * @param block block to decode
568 * @param[in] n subblock index
569 * @param coded are AC coeffs present or not
570 * @param codingset set of VLC to decode data
572 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
573 int coded, int codingset)
575 GetBitContext *gb = &v->s.gb;
576 MpegEncContext *s = &v->s;
577 int dc_pred_dir = 0; /* Direction of the DC prediction used */
580 int16_t *ac_val, *ac_val2;
583 /* Get DC differential */
585 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
587 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
590 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
594 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
595 if (dcdiff == 119 /* ESC index value */) {
596 dcdiff = get_bits(gb, 8 + m);
599 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
606 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
609 /* Store the quantized DC coeff, used for prediction */
611 scale = s->y_dc_scale;
613 scale = s->c_dc_scale;
614 block[0] = dcdiff * scale;
616 ac_val = s->ac_val[0][s->block_index[n]];
618 if (dc_pred_dir) // left
621 ac_val -= 16 * s->block_wrap[n];
623 scale = v->pq * 2 + v->halfpq;
629 int last = 0, skip, value;
630 const uint8_t *zz_table;
635 zz_table = v->zz_8x8[2];
637 zz_table = v->zz_8x8[3];
639 zz_table = v->zz_8x8[1];
642 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
646 block[zz_table[i++]] = value;
649 /* apply AC prediction if needed */
652 if (dc_pred_dir) { // left
658 for (k = 1; k < 8; k++)
659 block[k << sh] += ac_val[k];
661 /* save AC coeffs for further prediction */
662 for (k = 1; k < 8; k++) {
663 ac_val2[k] = block[k << v->left_blk_sh];
664 ac_val2[k + 8] = block[k << v->top_blk_sh];
667 /* scale AC coeffs */
668 for (k = 1; k < 64; k++)
672 block[k] += (block[k] < 0) ? -v->pq : v->pq;
678 memset(ac_val2, 0, 16 * 2);
680 /* apply AC prediction if needed */
683 if (dc_pred_dir) { //left
690 memcpy(ac_val2, ac_val, 8 * 2);
691 for (k = 1; k < 8; k++) {
692 block[k << sh] = ac_val[k] * scale;
693 if (!v->pquantizer && block[k << sh])
694 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
698 if (s->ac_pred) i = 63;
699 s->block_last_index[n] = i;
704 /** Decode intra block in intra frames - should be faster than decode_intra_block
705 * @param v VC1Context
706 * @param block block to decode
707 * @param[in] n subblock number
708 * @param coded are AC coeffs present or not
709 * @param codingset set of VLC to decode data
710 * @param mquant quantizer value for this macroblock
712 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
713 int coded, int codingset, int mquant)
715 GetBitContext *gb = &v->s.gb;
716 MpegEncContext *s = &v->s;
717 int dc_pred_dir = 0; /* Direction of the DC prediction used */
719 int16_t *dc_val = NULL;
720 int16_t *ac_val, *ac_val2;
722 int a_avail = v->a_avail, c_avail = v->c_avail;
723 int use_pred = s->ac_pred;
726 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
727 int quant = FFABS(mquant);
729 /* Get DC differential */
731 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
733 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
736 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
740 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
741 if (dcdiff == 119 /* ESC index value */) {
742 dcdiff = get_bits(gb, 8 + m);
745 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
752 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
755 /* Store the quantized DC coeff, used for prediction */
757 scale = s->y_dc_scale;
759 scale = s->c_dc_scale;
760 block[0] = dcdiff * scale;
762 /* check if AC is needed at all */
763 if (!a_avail && !c_avail)
766 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
768 ac_val = s->ac_val[0][s->block_index[n]];
770 if (dc_pred_dir) // left
773 ac_val -= 16 * s->block_wrap[n];
775 q1 = s->current_picture.qscale_table[mb_pos];
778 else if (dc_pred_dir) {
781 else if (c_avail && mb_pos)
782 q2 = s->current_picture.qscale_table[mb_pos - 1];
786 else if (a_avail && mb_pos >= s->mb_stride)
787 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
794 int last = 0, skip, value;
795 const uint8_t *zz_table;
799 if (!use_pred && v->fcm == ILACE_FRAME) {
800 zz_table = v->zzi_8x8;
802 if (!dc_pred_dir) // top
803 zz_table = v->zz_8x8[2];
805 zz_table = v->zz_8x8[3];
808 if (v->fcm != ILACE_FRAME)
809 zz_table = v->zz_8x8[1];
811 zz_table = v->zzi_8x8;
815 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
819 block[zz_table[i++]] = value;
822 /* apply AC prediction if needed */
825 if (dc_pred_dir) { // left
831 /* scale predictors if needed*/
832 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
834 return AVERROR_INVALIDDATA;
836 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
837 if (q2 && q1 != q2) {
838 for (k = 1; k < 8; k++)
839 block[k << sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
841 for (k = 1; k < 8; k++)
842 block[k << sh] += ac_val[k];
845 /* save AC coeffs for further prediction */
846 for (k = 1; k < 8; k++) {
847 ac_val2[k ] = block[k << v->left_blk_sh];
848 ac_val2[k + 8] = block[k << v->top_blk_sh];
851 /* scale AC coeffs */
852 for (k = 1; k < 64; k++)
856 block[k] += (block[k] < 0) ? -quant : quant;
859 } else { // no AC coeffs
862 memset(ac_val2, 0, 16 * 2);
864 /* apply AC prediction if needed */
867 if (dc_pred_dir) { // left
874 memcpy(ac_val2, ac_val, 8 * 2);
875 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
877 return AVERROR_INVALIDDATA;
879 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
880 if (q2 && q1 != q2) {
881 for (k = 1; k < 8; k++)
882 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
884 for (k = 1; k < 8; k++) {
885 block[k << sh] = ac_val2[k] * scale;
886 if (!v->pquantizer && block[k << sh])
887 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
891 if (use_pred) i = 63;
892 s->block_last_index[n] = i;
897 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
898 * @param v VC1Context
899 * @param block block to decode
900 * @param[in] n subblock index
901 * @param coded are AC coeffs present or not
902 * @param mquant block quantizer
903 * @param codingset set of VLC to decode data
905 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
906 int coded, int mquant, int codingset)
908 GetBitContext *gb = &v->s.gb;
909 MpegEncContext *s = &v->s;
910 int dc_pred_dir = 0; /* Direction of the DC prediction used */
912 int16_t *dc_val = NULL;
913 int16_t *ac_val, *ac_val2;
915 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
916 int a_avail = v->a_avail, c_avail = v->c_avail;
917 int use_pred = s->ac_pred;
920 int quant = FFABS(mquant);
922 s->bdsp.clear_block(block);
924 /* XXX: Guard against dumb values of mquant */
925 quant = av_clip_uintp2(quant, 5);
927 /* Set DC scale - y and c use the same */
928 s->y_dc_scale = s->y_dc_scale_table[quant];
929 s->c_dc_scale = s->c_dc_scale_table[quant];
931 /* Get DC differential */
933 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
935 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
938 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
942 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
943 if (dcdiff == 119 /* ESC index value */) {
944 dcdiff = get_bits(gb, 8 + m);
947 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
954 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
957 /* Store the quantized DC coeff, used for prediction */
960 block[0] = dcdiff * s->y_dc_scale;
962 block[0] = dcdiff * s->c_dc_scale;
968 /* check if AC is needed at all and adjust direction if needed */
969 if (!a_avail) dc_pred_dir = 1;
970 if (!c_avail) dc_pred_dir = 0;
971 if (!a_avail && !c_avail) use_pred = 0;
972 ac_val = s->ac_val[0][s->block_index[n]];
975 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
977 if (dc_pred_dir) //left
980 ac_val -= 16 * s->block_wrap[n];
982 q1 = s->current_picture.qscale_table[mb_pos];
983 if (dc_pred_dir && c_avail && mb_pos)
984 q2 = s->current_picture.qscale_table[mb_pos - 1];
985 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
986 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
987 if (dc_pred_dir && n == 1)
989 if (!dc_pred_dir && n == 2)
994 int last = 0, skip, value;
998 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
1002 if (v->fcm == PROGRESSIVE)
1003 block[v->zz_8x8[0][i++]] = value;
1005 if (use_pred && (v->fcm == ILACE_FRAME)) {
1006 if (!dc_pred_dir) // top
1007 block[v->zz_8x8[2][i++]] = value;
1009 block[v->zz_8x8[3][i++]] = value;
1011 block[v->zzi_8x8[i++]] = value;
1016 /* apply AC prediction if needed */
1018 /* scale predictors if needed*/
1019 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1021 return AVERROR_INVALIDDATA;
1023 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1024 if (q2 && q1 != q2) {
1025 if (dc_pred_dir) { // left
1026 for (k = 1; k < 8; k++)
1027 block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1029 for (k = 1; k < 8; k++)
1030 block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1033 if (dc_pred_dir) { // left
1034 for (k = 1; k < 8; k++)
1035 block[k << v->left_blk_sh] += ac_val[k];
1037 for (k = 1; k < 8; k++)
1038 block[k << v->top_blk_sh] += ac_val[k + 8];
1042 /* save AC coeffs for further prediction */
1043 for (k = 1; k < 8; k++) {
1044 ac_val2[k ] = block[k << v->left_blk_sh];
1045 ac_val2[k + 8] = block[k << v->top_blk_sh];
1048 /* scale AC coeffs */
1049 for (k = 1; k < 64; k++)
1053 block[k] += (block[k] < 0) ? -quant : quant;
1056 if (use_pred) i = 63;
1057 } else { // no AC coeffs
1060 memset(ac_val2, 0, 16 * 2);
1061 if (dc_pred_dir) { // left
1063 memcpy(ac_val2, ac_val, 8 * 2);
1064 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1066 return AVERROR_INVALIDDATA;
1068 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1069 if (q2 && q1 != q2) {
1070 for (k = 1; k < 8; k++)
1071 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1076 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1077 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1079 return AVERROR_INVALIDDATA;
1081 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1082 if (q2 && q1 != q2) {
1083 for (k = 1; k < 8; k++)
1084 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1089 /* apply AC prediction if needed */
1091 if (dc_pred_dir) { // left
1092 for (k = 1; k < 8; k++) {
1093 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1094 if (!v->pquantizer && block[k << v->left_blk_sh])
1095 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1098 for (k = 1; k < 8; k++) {
1099 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1100 if (!v->pquantizer && block[k << v->top_blk_sh])
1101 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1107 s->block_last_index[n] = i;
1114 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1115 int mquant, int ttmb, int first_block,
1116 uint8_t *dst, int linesize, int skip_block,
1119 MpegEncContext *s = &v->s;
1120 GetBitContext *gb = &s->gb;
1123 int scale, off, idx, last, skip, value;
1124 int ttblk = ttmb & 7;
1126 int quant = FFABS(mquant);
1128 s->bdsp.clear_block(block);
1131 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
1133 if (ttblk == TT_4X4) {
1134 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1136 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1137 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1138 || (!v->res_rtm_flag && !first_block))) {
1139 subblkpat = decode012(gb);
1141 subblkpat ^= 3; // swap decoded pattern bits
1142 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1144 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1147 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1149 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1150 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1151 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1154 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1155 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1164 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1169 idx = v->zz_8x8[0][i++];
1171 idx = v->zzi_8x8[i++];
1172 block[idx] = value * scale;
1174 block[idx] += (block[idx] < 0) ? -quant : quant;
1178 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1180 v->vc1dsp.vc1_inv_trans_8x8(block);
1181 s->idsp.add_pixels_clamped(block, dst, linesize);
1186 pat = ~subblkpat & 0xF;
1187 for (j = 0; j < 4; j++) {
1188 last = subblkpat & (1 << (3 - j));
1190 off = (j & 1) * 4 + (j & 2) * 16;
1192 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1197 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1199 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1200 block[idx + off] = value * scale;
1202 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1204 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1206 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1208 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1213 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1214 for (j = 0; j < 2; j++) {
1215 last = subblkpat & (1 << (1 - j));
1219 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1224 idx = v->zz_8x4[i++] + off;
1226 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1227 block[idx] = value * scale;
1229 block[idx] += (block[idx] < 0) ? -quant : quant;
1231 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1233 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1235 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1240 pat = ~(subblkpat * 5) & 0xF;
1241 for (j = 0; j < 2; j++) {
1242 last = subblkpat & (1 << (1 - j));
1246 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1251 idx = v->zz_4x8[i++] + off;
1253 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1254 block[idx] = value * scale;
1256 block[idx] += (block[idx] < 0) ? -quant : quant;
1258 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1260 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1262 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1268 *ttmb_out |= ttblk << (n * 4);
1272 /** @} */ // Macroblock group
1274 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1276 /** Decode one P-frame MB
1278 static int vc1_decode_p_mb(VC1Context *v)
1280 MpegEncContext *s = &v->s;
1281 GetBitContext *gb = &s->gb;
1283 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1284 int cbp; /* cbp decoding stuff */
1285 int mqdiff, mquant; /* MB quantization */
1286 int ttmb = v->ttfrm; /* MB Transform type */
1288 int mb_has_coeffs = 1; /* last_flag */
1289 int dmv_x, dmv_y; /* Differential MV components */
1290 int index, index1; /* LUT indexes */
1291 int val, sign; /* temp values */
1292 int first_block = 1;
1294 int skipped, fourmv;
1295 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1297 mquant = v->pq; /* lossy initialization */
1299 if (v->mv_type_is_raw)
1300 fourmv = get_bits1(gb);
1302 fourmv = v->mv_type_mb_plane[mb_pos];
1304 skipped = get_bits1(gb);
1306 skipped = v->s.mbskip_table[mb_pos];
1308 if (!fourmv) { /* 1MV mode */
1310 GET_MVDATA(dmv_x, dmv_y);
1313 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1314 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1316 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1317 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1319 /* FIXME Set DC val for inter block ? */
1320 if (s->mb_intra && !mb_has_coeffs) {
1322 s->ac_pred = get_bits1(gb);
1324 } else if (mb_has_coeffs) {
1326 s->ac_pred = get_bits1(gb);
1327 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1333 s->current_picture.qscale_table[mb_pos] = mquant;
1335 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1336 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1337 VC1_TTMB_VLC_BITS, 2);
1338 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1340 for (i = 0; i < 6; i++) {
1341 s->dc_val[0][s->block_index[i]] = 0;
1343 val = ((cbp >> (5 - i)) & 1);
1344 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1345 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1347 /* check if prediction blocks A and C are available */
1348 v->a_avail = v->c_avail = 0;
1349 if (i == 2 || i == 3 || !s->first_slice_line)
1350 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1351 if (i == 1 || i == 3 || s->mb_x)
1352 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1354 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1355 (i & 4) ? v->codingset2 : v->codingset);
1356 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1358 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1360 for (j = 0; j < 64; j++)
1361 v->block[v->cur_blk_idx][block_map[i]][j] <<= 1;
1362 block_cbp |= 0xF << (i << 2);
1363 block_intra |= 1 << i;
1365 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1366 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1367 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1368 block_cbp |= pat << (i << 2);
1369 if (!v->ttmbf && ttmb < 8)
1376 for (i = 0; i < 6; i++) {
1377 v->mb_type[0][s->block_index[i]] = 0;
1378 s->dc_val[0][s->block_index[i]] = 0;
1380 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1381 s->current_picture.qscale_table[mb_pos] = 0;
1382 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1383 ff_vc1_mc_1mv(v, 0);
1385 } else { // 4MV mode
1386 if (!skipped /* unskipped MB */) {
1387 int intra_count = 0, coded_inter = 0;
1388 int is_intra[6], is_coded[6];
1390 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1391 for (i = 0; i < 6; i++) {
1392 val = ((cbp >> (5 - i)) & 1);
1393 s->dc_val[0][s->block_index[i]] = 0;
1400 GET_MVDATA(dmv_x, dmv_y);
1402 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1404 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1405 intra_count += s->mb_intra;
1406 is_intra[i] = s->mb_intra;
1407 is_coded[i] = mb_has_coeffs;
1410 is_intra[i] = (intra_count >= 3);
1414 ff_vc1_mc_4mv_chroma(v, 0);
1415 v->mb_type[0][s->block_index[i]] = is_intra[i];
1417 coded_inter = !is_intra[i] & is_coded[i];
1419 // if there are no coded blocks then don't do anything more
1421 if (!intra_count && !coded_inter)
1424 s->current_picture.qscale_table[mb_pos] = mquant;
1425 /* test if block is intra and has pred */
1428 for (i = 0; i < 6; i++)
1430 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1431 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1437 s->ac_pred = get_bits1(gb);
1441 if (!v->ttmbf && coded_inter)
1442 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1443 for (i = 0; i < 6; i++) {
1445 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1446 s->mb_intra = is_intra[i];
1448 /* check if prediction blocks A and C are available */
1449 v->a_avail = v->c_avail = 0;
1450 if (i == 2 || i == 3 || !s->first_slice_line)
1451 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1452 if (i == 1 || i == 3 || s->mb_x)
1453 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1455 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1456 (i & 4) ? v->codingset2 : v->codingset);
1457 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1459 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1461 for (j = 0; j < 64; j++)
1462 v->block[v->cur_blk_idx][block_map[i]][j] <<= 1;
1463 block_cbp |= 0xF << (i << 2);
1464 block_intra |= 1 << i;
1465 } else if (is_coded[i]) {
1466 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1467 first_block, s->dest[dst_idx] + off,
1468 (i & 4) ? s->uvlinesize : s->linesize,
1469 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1471 block_cbp |= pat << (i << 2);
1472 if (!v->ttmbf && ttmb < 8)
1477 } else { // skipped MB
1479 s->current_picture.qscale_table[mb_pos] = 0;
1480 for (i = 0; i < 6; i++) {
1481 v->mb_type[0][s->block_index[i]] = 0;
1482 s->dc_val[0][s->block_index[i]] = 0;
1484 for (i = 0; i < 4; i++) {
1485 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1486 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1488 ff_vc1_mc_4mv_chroma(v, 0);
1489 s->current_picture.qscale_table[mb_pos] = 0;
1493 if (v->overlap && v->pq >= 9)
1494 ff_vc1_p_overlap_filter(v);
1495 vc1_put_blocks_clamped(v, 1);
1497 v->cbp[s->mb_x] = block_cbp;
1498 v->ttblk[s->mb_x] = block_tt;
1499 v->is_intra[s->mb_x] = block_intra;
1504 /* Decode one macroblock in an interlaced frame p picture */
1506 static int vc1_decode_p_mb_intfr(VC1Context *v)
1508 MpegEncContext *s = &v->s;
1509 GetBitContext *gb = &s->gb;
1511 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1512 int cbp = 0; /* cbp decoding stuff */
1513 int mqdiff, mquant; /* MB quantization */
1514 int ttmb = v->ttfrm; /* MB Transform type */
1516 int mb_has_coeffs = 1; /* last_flag */
1517 int dmv_x, dmv_y; /* Differential MV components */
1518 int val; /* temp value */
1519 int first_block = 1;
1521 int skipped, fourmv = 0, twomv = 0;
1522 int block_cbp = 0, pat, block_tt = 0;
1523 int idx_mbmode = 0, mvbp;
1526 mquant = v->pq; /* Lossy initialization */
1529 skipped = get_bits1(gb);
1531 skipped = v->s.mbskip_table[mb_pos];
1533 if (v->fourmvswitch)
1534 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1536 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1537 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1538 /* store the motion vector type in a flag (useful later) */
1539 case MV_PMODE_INTFR_4MV:
1541 v->blk_mv_type[s->block_index[0]] = 0;
1542 v->blk_mv_type[s->block_index[1]] = 0;
1543 v->blk_mv_type[s->block_index[2]] = 0;
1544 v->blk_mv_type[s->block_index[3]] = 0;
1546 case MV_PMODE_INTFR_4MV_FIELD:
1548 v->blk_mv_type[s->block_index[0]] = 1;
1549 v->blk_mv_type[s->block_index[1]] = 1;
1550 v->blk_mv_type[s->block_index[2]] = 1;
1551 v->blk_mv_type[s->block_index[3]] = 1;
1553 case MV_PMODE_INTFR_2MV_FIELD:
1555 v->blk_mv_type[s->block_index[0]] = 1;
1556 v->blk_mv_type[s->block_index[1]] = 1;
1557 v->blk_mv_type[s->block_index[2]] = 1;
1558 v->blk_mv_type[s->block_index[3]] = 1;
1560 case MV_PMODE_INTFR_1MV:
1561 v->blk_mv_type[s->block_index[0]] = 0;
1562 v->blk_mv_type[s->block_index[1]] = 0;
1563 v->blk_mv_type[s->block_index[2]] = 0;
1564 v->blk_mv_type[s->block_index[3]] = 0;
1567 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1568 for (i = 0; i < 4; i++) {
1569 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1570 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1572 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1574 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1575 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1576 mb_has_coeffs = get_bits1(gb);
1578 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1579 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1581 s->current_picture.qscale_table[mb_pos] = mquant;
1582 /* Set DC scale - y and c use the same (not sure if necessary here) */
1583 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1584 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1586 for (i = 0; i < 6; i++) {
1587 v->a_avail = v->c_avail = 0;
1588 v->mb_type[0][s->block_index[i]] = 1;
1589 s->dc_val[0][s->block_index[i]] = 0;
1591 val = ((cbp >> (5 - i)) & 1);
1592 if (i == 2 || i == 3 || !s->first_slice_line)
1593 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1594 if (i == 1 || i == 3 || s->mb_x)
1595 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1597 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1598 (i & 4) ? v->codingset2 : v->codingset);
1599 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1601 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1603 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1606 block_cbp |= 0xf << (i << 2);
1609 } else { // inter MB
1610 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1612 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1613 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1614 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1616 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1617 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1618 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1621 s->mb_intra = v->is_intra[s->mb_x] = 0;
1622 for (i = 0; i < 6; i++)
1623 v->mb_type[0][s->block_index[i]] = 0;
1624 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1625 /* for all motion vector read MVDATA and motion compensate each block */
1629 for (i = 0; i < 4; i++) {
1631 if (mvbp & (8 >> i))
1632 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1633 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1634 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1636 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1641 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1643 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1644 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1645 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1648 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1650 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1651 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1652 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1653 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1655 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1658 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1660 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1661 ff_vc1_mc_1mv(v, 0);
1664 GET_MQUANT(); // p. 227
1665 s->current_picture.qscale_table[mb_pos] = mquant;
1666 if (!v->ttmbf && cbp)
1667 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1668 for (i = 0; i < 6; i++) {
1669 s->dc_val[0][s->block_index[i]] = 0;
1671 val = ((cbp >> (5 - i)) & 1);
1673 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1675 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1677 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1678 first_block, s->dest[dst_idx] + off,
1679 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1680 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1681 block_cbp |= pat << (i << 2);
1682 if (!v->ttmbf && ttmb < 8)
1689 s->mb_intra = v->is_intra[s->mb_x] = 0;
1690 for (i = 0; i < 6; i++) {
1691 v->mb_type[0][s->block_index[i]] = 0;
1692 s->dc_val[0][s->block_index[i]] = 0;
1694 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1695 s->current_picture.qscale_table[mb_pos] = 0;
1696 v->blk_mv_type[s->block_index[0]] = 0;
1697 v->blk_mv_type[s->block_index[1]] = 0;
1698 v->blk_mv_type[s->block_index[2]] = 0;
1699 v->blk_mv_type[s->block_index[3]] = 0;
1700 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1701 ff_vc1_mc_1mv(v, 0);
1702 v->fieldtx_plane[mb_pos] = 0;
1704 if (v->overlap && v->pq >= 9)
1705 ff_vc1_p_overlap_filter(v);
1706 vc1_put_blocks_clamped(v, 1);
1708 v->cbp[s->mb_x] = block_cbp;
1709 v->ttblk[s->mb_x] = block_tt;
1714 static int vc1_decode_p_mb_intfi(VC1Context *v)
1716 MpegEncContext *s = &v->s;
1717 GetBitContext *gb = &s->gb;
1719 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1720 int cbp = 0; /* cbp decoding stuff */
1721 int mqdiff, mquant; /* MB quantization */
1722 int ttmb = v->ttfrm; /* MB Transform type */
1724 int mb_has_coeffs = 1; /* last_flag */
1725 int dmv_x, dmv_y; /* Differential MV components */
1726 int val; /* temp values */
1727 int first_block = 1;
1730 int block_cbp = 0, pat, block_tt = 0;
1733 mquant = v->pq; /* Lossy initialization */
1735 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1736 if (idx_mbmode <= 1) { // intra MB
1737 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1739 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1740 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1741 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1743 s->current_picture.qscale_table[mb_pos] = mquant;
1744 /* Set DC scale - y and c use the same (not sure if necessary here) */
1745 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1746 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1747 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1748 mb_has_coeffs = idx_mbmode & 1;
1750 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1752 for (i = 0; i < 6; i++) {
1753 v->a_avail = v->c_avail = 0;
1754 v->mb_type[0][s->block_index[i]] = 1;
1755 s->dc_val[0][s->block_index[i]] = 0;
1757 val = ((cbp >> (5 - i)) & 1);
1758 if (i == 2 || i == 3 || !s->first_slice_line)
1759 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1760 if (i == 1 || i == 3 || s->mb_x)
1761 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1763 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1764 (i & 4) ? v->codingset2 : v->codingset);
1765 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1767 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1768 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1769 block_cbp |= 0xf << (i << 2);
1772 s->mb_intra = v->is_intra[s->mb_x] = 0;
1773 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1774 for (i = 0; i < 6; i++)
1775 v->mb_type[0][s->block_index[i]] = 0;
1776 if (idx_mbmode <= 5) { // 1-MV
1777 dmv_x = dmv_y = pred_flag = 0;
1778 if (idx_mbmode & 1) {
1779 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1781 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1782 ff_vc1_mc_1mv(v, 0);
1783 mb_has_coeffs = !(idx_mbmode & 2);
1785 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1786 for (i = 0; i < 4; i++) {
1787 dmv_x = dmv_y = pred_flag = 0;
1788 if (v->fourmvbp & (8 >> i))
1789 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1790 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1791 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1793 ff_vc1_mc_4mv_chroma(v, 0);
1794 mb_has_coeffs = idx_mbmode & 1;
1797 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1801 s->current_picture.qscale_table[mb_pos] = mquant;
1802 if (!v->ttmbf && cbp) {
1803 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1806 for (i = 0; i < 6; i++) {
1807 s->dc_val[0][s->block_index[i]] = 0;
1809 val = ((cbp >> (5 - i)) & 1);
1810 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1812 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1813 first_block, s->dest[dst_idx] + off,
1814 (i & 4) ? s->uvlinesize : s->linesize,
1815 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1817 block_cbp |= pat << (i << 2);
1818 if (!v->ttmbf && ttmb < 8)
1824 if (v->overlap && v->pq >= 9)
1825 ff_vc1_p_overlap_filter(v);
1826 vc1_put_blocks_clamped(v, 1);
1828 v->cbp[s->mb_x] = block_cbp;
1829 v->ttblk[s->mb_x] = block_tt;
1834 /** Decode one B-frame MB (in Main profile)
1836 static void vc1_decode_b_mb(VC1Context *v)
1838 MpegEncContext *s = &v->s;
1839 GetBitContext *gb = &s->gb;
1841 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1842 int cbp = 0; /* cbp decoding stuff */
1843 int mqdiff, mquant; /* MB quantization */
1844 int ttmb = v->ttfrm; /* MB Transform type */
1845 int mb_has_coeffs = 0; /* last_flag */
1846 int index, index1; /* LUT indexes */
1847 int val, sign; /* temp values */
1848 int first_block = 1;
1850 int skipped, direct;
1851 int dmv_x[2], dmv_y[2];
1852 int bmvtype = BMV_TYPE_BACKWARD;
1854 mquant = v->pq; /* lossy initialization */
1858 direct = get_bits1(gb);
1860 direct = v->direct_mb_plane[mb_pos];
1862 skipped = get_bits1(gb);
1864 skipped = v->s.mbskip_table[mb_pos];
1866 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1867 for (i = 0; i < 6; i++) {
1868 v->mb_type[0][s->block_index[i]] = 0;
1869 s->dc_val[0][s->block_index[i]] = 0;
1871 s->current_picture.qscale_table[mb_pos] = 0;
1875 GET_MVDATA(dmv_x[0], dmv_y[0]);
1876 dmv_x[1] = dmv_x[0];
1877 dmv_y[1] = dmv_y[0];
1879 if (skipped || !s->mb_intra) {
1880 bmvtype = decode012(gb);
1883 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1886 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1889 bmvtype = BMV_TYPE_INTERPOLATED;
1890 dmv_x[0] = dmv_y[0] = 0;
1894 for (i = 0; i < 6; i++)
1895 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1899 bmvtype = BMV_TYPE_INTERPOLATED;
1900 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1901 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1905 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1908 s->current_picture.qscale_table[mb_pos] = mquant;
1910 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1911 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1912 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1913 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1915 if (!mb_has_coeffs && !s->mb_intra) {
1916 /* no coded blocks - effectively skipped */
1917 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1918 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1921 if (s->mb_intra && !mb_has_coeffs) {
1923 s->current_picture.qscale_table[mb_pos] = mquant;
1924 s->ac_pred = get_bits1(gb);
1926 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1928 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1929 GET_MVDATA(dmv_x[0], dmv_y[0]);
1930 if (!mb_has_coeffs) {
1931 /* interpolated skipped block */
1932 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1933 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1937 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1939 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1942 s->ac_pred = get_bits1(gb);
1943 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1945 s->current_picture.qscale_table[mb_pos] = mquant;
1946 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1947 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1951 for (i = 0; i < 6; i++) {
1952 s->dc_val[0][s->block_index[i]] = 0;
1954 val = ((cbp >> (5 - i)) & 1);
1955 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1956 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1958 /* check if prediction blocks A and C are available */
1959 v->a_avail = v->c_avail = 0;
1960 if (i == 2 || i == 3 || !s->first_slice_line)
1961 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1962 if (i == 1 || i == 3 || s->mb_x)
1963 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1965 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1966 (i & 4) ? v->codingset2 : v->codingset);
1967 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1969 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1971 for (j = 0; j < 64; j++)
1972 s->block[i][j] <<= 1;
1973 s->idsp.put_signed_pixels_clamped(s->block[i],
1974 s->dest[dst_idx] + off,
1975 i & 4 ? s->uvlinesize
1978 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1979 first_block, s->dest[dst_idx] + off,
1980 (i & 4) ? s->uvlinesize : s->linesize,
1981 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
1982 if (!v->ttmbf && ttmb < 8)
1989 /** Decode one B-frame MB (in interlaced field B picture)
1991 static void vc1_decode_b_mb_intfi(VC1Context *v)
1993 MpegEncContext *s = &v->s;
1994 GetBitContext *gb = &s->gb;
1996 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1997 int cbp = 0; /* cbp decoding stuff */
1998 int mqdiff, mquant; /* MB quantization */
1999 int ttmb = v->ttfrm; /* MB Transform type */
2000 int mb_has_coeffs = 0; /* last_flag */
2001 int val; /* temp value */
2002 int first_block = 1;
2005 int dmv_x[2], dmv_y[2], pred_flag[2];
2006 int bmvtype = BMV_TYPE_BACKWARD;
2007 int block_cbp = 0, pat, block_tt = 0;
2010 mquant = v->pq; /* Lossy initialization */
2013 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2014 if (idx_mbmode <= 1) { // intra MB
2015 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2017 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2018 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2019 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2021 s->current_picture.qscale_table[mb_pos] = mquant;
2022 /* Set DC scale - y and c use the same (not sure if necessary here) */
2023 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2024 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2025 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2026 mb_has_coeffs = idx_mbmode & 1;
2028 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2030 for (i = 0; i < 6; i++) {
2031 v->a_avail = v->c_avail = 0;
2032 v->mb_type[0][s->block_index[i]] = 1;
2033 s->dc_val[0][s->block_index[i]] = 0;
2035 val = ((cbp >> (5 - i)) & 1);
2036 if (i == 2 || i == 3 || !s->first_slice_line)
2037 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2038 if (i == 1 || i == 3 || s->mb_x)
2039 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2041 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2042 (i & 4) ? v->codingset2 : v->codingset);
2043 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2045 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2047 for (j = 0; j < 64; j++)
2048 s->block[i][j] <<= 1;
2049 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2050 s->idsp.put_signed_pixels_clamped(s->block[i],
2051 s->dest[dst_idx] + off,
2052 (i & 4) ? s->uvlinesize
2056 s->mb_intra = v->is_intra[s->mb_x] = 0;
2057 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2058 for (i = 0; i < 6; i++)
2059 v->mb_type[0][s->block_index[i]] = 0;
2061 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2063 fwd = v->forward_mb_plane[mb_pos];
2064 if (idx_mbmode <= 5) { // 1-MV
2066 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2067 pred_flag[0] = pred_flag[1] = 0;
2069 bmvtype = BMV_TYPE_FORWARD;
2071 bmvtype = decode012(gb);
2074 bmvtype = BMV_TYPE_BACKWARD;
2077 bmvtype = BMV_TYPE_DIRECT;
2080 bmvtype = BMV_TYPE_INTERPOLATED;
2081 interpmvp = get_bits1(gb);
2084 v->bmvtype = bmvtype;
2085 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2086 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2089 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2091 if (bmvtype == BMV_TYPE_DIRECT) {
2092 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2093 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2094 if (!s->next_picture_ptr->field_picture) {
2095 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2099 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2100 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2101 mb_has_coeffs = !(idx_mbmode & 2);
2104 bmvtype = BMV_TYPE_FORWARD;
2105 v->bmvtype = bmvtype;
2106 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2107 for (i = 0; i < 4; i++) {
2108 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2109 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2110 if (v->fourmvbp & (8 >> i)) {
2111 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2112 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2113 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2115 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2116 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2118 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2119 mb_has_coeffs = idx_mbmode & 1;
2122 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2126 s->current_picture.qscale_table[mb_pos] = mquant;
2127 if (!v->ttmbf && cbp) {
2128 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2131 for (i = 0; i < 6; i++) {
2132 s->dc_val[0][s->block_index[i]] = 0;
2134 val = ((cbp >> (5 - i)) & 1);
2135 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2137 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2138 first_block, s->dest[dst_idx] + off,
2139 (i & 4) ? s->uvlinesize : s->linesize,
2140 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2141 block_cbp |= pat << (i << 2);
2142 if (!v->ttmbf && ttmb < 8)
2148 v->cbp[s->mb_x] = block_cbp;
2149 v->ttblk[s->mb_x] = block_tt;
2152 /** Decode one B-frame MB (in interlaced frame B picture)
2154 static int vc1_decode_b_mb_intfr(VC1Context *v)
2156 MpegEncContext *s = &v->s;
2157 GetBitContext *gb = &s->gb;
2159 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2160 int cbp = 0; /* cbp decoding stuff */
2161 int mqdiff, mquant; /* MB quantization */
2162 int ttmb = v->ttfrm; /* MB Transform type */
2163 int mvsw = 0; /* motion vector switch */
2164 int mb_has_coeffs = 1; /* last_flag */
2165 int dmv_x, dmv_y; /* Differential MV components */
2166 int val; /* temp value */
2167 int first_block = 1;
2169 int skipped, direct, twomv = 0;
2170 int block_cbp = 0, pat, block_tt = 0;
2171 int idx_mbmode = 0, mvbp;
2172 int stride_y, fieldtx;
2173 int bmvtype = BMV_TYPE_BACKWARD;
2176 mquant = v->pq; /* Lossy initialization */
2179 skipped = get_bits1(gb);
2181 skipped = v->s.mbskip_table[mb_pos];
2184 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2185 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2187 v->blk_mv_type[s->block_index[0]] = 1;
2188 v->blk_mv_type[s->block_index[1]] = 1;
2189 v->blk_mv_type[s->block_index[2]] = 1;
2190 v->blk_mv_type[s->block_index[3]] = 1;
2192 v->blk_mv_type[s->block_index[0]] = 0;
2193 v->blk_mv_type[s->block_index[1]] = 0;
2194 v->blk_mv_type[s->block_index[2]] = 0;
2195 v->blk_mv_type[s->block_index[3]] = 0;
2199 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2200 for (i = 0; i < 4; i++) {
2201 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2202 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2203 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2204 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2206 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2208 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2209 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2210 mb_has_coeffs = get_bits1(gb);
2212 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2213 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2215 s->current_picture.qscale_table[mb_pos] = mquant;
2216 /* Set DC scale - y and c use the same (not sure if necessary here) */
2217 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2218 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2220 for (i = 0; i < 6; i++) {
2221 v->a_avail = v->c_avail = 0;
2222 v->mb_type[0][s->block_index[i]] = 1;
2223 s->dc_val[0][s->block_index[i]] = 0;
2225 val = ((cbp >> (5 - i)) & 1);
2226 if (i == 2 || i == 3 || !s->first_slice_line)
2227 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2228 if (i == 1 || i == 3 || s->mb_x)
2229 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2231 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2232 (i & 4) ? v->codingset2 : v->codingset);
2233 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2235 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2237 stride_y = s->linesize << fieldtx;
2238 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2240 stride_y = s->uvlinesize;
2243 s->idsp.put_signed_pixels_clamped(s->block[i],
2244 s->dest[dst_idx] + off,
2248 s->mb_intra = v->is_intra[s->mb_x] = 0;
2251 direct = get_bits1(gb);
2253 direct = v->direct_mb_plane[mb_pos];
2256 if (s->next_picture_ptr->field_picture)
2257 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2258 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);
2259 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);
2260 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);
2261 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);
2264 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);
2265 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);
2266 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);
2267 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);
2269 for (i = 1; i < 4; i += 2) {
2270 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2271 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2272 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2273 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2276 for (i = 1; i < 4; i++) {
2277 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2278 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2279 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2280 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2286 if (skipped || !s->mb_intra) {
2287 bmvtype = decode012(gb);
2290 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2293 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2296 bmvtype = BMV_TYPE_INTERPOLATED;
2300 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2301 mvsw = get_bits1(gb);
2304 if (!skipped) { // inter MB
2305 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2307 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2309 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2310 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2311 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2312 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2316 for (i = 0; i < 6; i++)
2317 v->mb_type[0][s->block_index[i]] = 0;
2318 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2319 /* for all motion vector read MVDATA and motion compensate each block */
2323 for (i = 0; i < 4; i++) {
2324 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2325 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2327 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2328 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2330 ff_vc1_mc_1mv(v, 0);
2331 ff_vc1_interp_mc(v);
2333 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2335 for (i = 0; i < 4; i++) {
2338 val = ((mvbp >> (3 - i)) & 1);
2340 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2342 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2343 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2344 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2347 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2348 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2349 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2353 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2355 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2356 ff_vc1_mc_1mv(v, 0);
2360 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2362 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2363 ff_vc1_interp_mc(v);
2365 dir = bmvtype == BMV_TYPE_BACKWARD;
2372 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2373 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2377 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2378 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2381 for (i = 0; i < 2; i++) {
2382 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];
2383 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];
2384 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];
2385 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];
2388 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2389 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2392 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2393 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2394 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2395 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2396 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2398 dir = bmvtype == BMV_TYPE_BACKWARD;
2400 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2403 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2405 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2406 v->blk_mv_type[s->block_index[0]] = 1;
2407 v->blk_mv_type[s->block_index[1]] = 1;
2408 v->blk_mv_type[s->block_index[2]] = 1;
2409 v->blk_mv_type[s->block_index[3]] = 1;
2410 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2411 for (i = 0; i < 2; i++) {
2412 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];
2413 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];
2415 ff_vc1_mc_1mv(v, dir);
2419 GET_MQUANT(); // p. 227
2420 s->current_picture.qscale_table[mb_pos] = mquant;
2421 if (!v->ttmbf && cbp)
2422 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2423 for (i = 0; i < 6; i++) {
2424 s->dc_val[0][s->block_index[i]] = 0;
2426 val = ((cbp >> (5 - i)) & 1);
2428 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2430 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2432 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2433 first_block, s->dest[dst_idx] + off,
2434 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2435 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2436 block_cbp |= pat << (i << 2);
2437 if (!v->ttmbf && ttmb < 8)
2445 for (i = 0; i < 6; i++) {
2446 v->mb_type[0][s->block_index[i]] = 0;
2447 s->dc_val[0][s->block_index[i]] = 0;
2449 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2450 s->current_picture.qscale_table[mb_pos] = 0;
2451 v->blk_mv_type[s->block_index[0]] = 0;
2452 v->blk_mv_type[s->block_index[1]] = 0;
2453 v->blk_mv_type[s->block_index[2]] = 0;
2454 v->blk_mv_type[s->block_index[3]] = 0;
2457 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2458 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2459 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2461 dir = bmvtype == BMV_TYPE_BACKWARD;
2462 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2467 for (i = 0; i < 2; i++) {
2468 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];
2469 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];
2470 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];
2471 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];
2474 v->blk_mv_type[s->block_index[0]] = 1;
2475 v->blk_mv_type[s->block_index[1]] = 1;
2476 v->blk_mv_type[s->block_index[2]] = 1;
2477 v->blk_mv_type[s->block_index[3]] = 1;
2478 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2479 for (i = 0; i < 2; i++) {
2480 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];
2481 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];
2487 ff_vc1_mc_1mv(v, dir);
2488 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2489 ff_vc1_interp_mc(v);
2491 v->fieldtx_plane[mb_pos] = 0;
2494 v->cbp[s->mb_x] = block_cbp;
2495 v->ttblk[s->mb_x] = block_tt;
2500 /** Decode blocks of I-frame
2502 static void vc1_decode_i_blocks(VC1Context *v)
2505 MpegEncContext *s = &v->s;
2510 /* select coding mode used for VLC tables selection */
2511 switch (v->y_ac_table_index) {
2513 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2516 v->codingset = CS_HIGH_MOT_INTRA;
2519 v->codingset = CS_MID_RATE_INTRA;
2523 switch (v->c_ac_table_index) {
2525 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2528 v->codingset2 = CS_HIGH_MOT_INTER;
2531 v->codingset2 = CS_MID_RATE_INTER;
2535 /* Set DC scale - y and c use the same */
2536 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2537 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2540 s->mb_x = s->mb_y = 0;
2542 s->first_slice_line = 1;
2543 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2545 init_block_index(v);
2546 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2547 ff_update_block_index(s);
2548 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2549 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2550 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2551 s->current_picture.qscale_table[mb_pos] = v->pq;
2552 for (int i = 0; i < 4; i++) {
2553 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2554 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2557 // do actual MB decoding and displaying
2558 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2559 v->s.ac_pred = get_bits1(&v->s.gb);
2561 for (k = 0; k < 6; k++) {
2562 v->mb_type[0][s->block_index[k]] = 1;
2564 val = ((cbp >> (5 - k)) & 1);
2567 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2571 cbp |= val << (5 - k);
2573 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2575 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2577 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2580 if (v->overlap && v->pq >= 9) {
2581 ff_vc1_i_overlap_filter(v);
2583 for (k = 0; k < 6; k++)
2584 for (j = 0; j < 64; j++)
2585 v->block[v->cur_blk_idx][block_map[k]][j] <<= 1;
2586 vc1_put_blocks_clamped(v, 1);
2589 for (k = 0; k < 6; k++)
2590 for (j = 0; j < 64; j++)
2591 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) << 1;
2592 vc1_put_blocks_clamped(v, 0);
2595 if (v->s.loop_filter)
2596 ff_vc1_i_loop_filter(v);
2598 if (get_bits_count(&s->gb) > v->bits) {
2599 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2600 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2601 get_bits_count(&s->gb), v->bits);
2605 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2606 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2607 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2608 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2610 if (!v->s.loop_filter)
2611 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2613 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2615 s->first_slice_line = 0;
2617 if (v->s.loop_filter)
2618 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2620 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2621 * profile, these only differ are when decoding MSS2 rectangles. */
2622 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2625 /** Decode blocks of I-frame for advanced profile
2627 static void vc1_decode_i_blocks_adv(VC1Context *v)
2630 MpegEncContext *s = &v->s;
2636 GetBitContext *gb = &s->gb;
2638 /* select coding mode used for VLC tables selection */
2639 switch (v->y_ac_table_index) {
2641 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2644 v->codingset = CS_HIGH_MOT_INTRA;
2647 v->codingset = CS_MID_RATE_INTRA;
2651 switch (v->c_ac_table_index) {
2653 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2656 v->codingset2 = CS_HIGH_MOT_INTER;
2659 v->codingset2 = CS_MID_RATE_INTER;
2664 s->mb_x = s->mb_y = 0;
2666 s->first_slice_line = 1;
2667 s->mb_y = s->start_mb_y;
2668 if (s->start_mb_y) {
2670 init_block_index(v);
2671 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2672 (1 + s->b8_stride) * sizeof(*s->coded_block));
2674 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2676 init_block_index(v);
2677 for (;s->mb_x < s->mb_width; s->mb_x++) {
2679 ff_update_block_index(s);
2680 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2681 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2682 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2683 for (int i = 0; i < 4; i++) {
2684 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2685 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2688 // do actual MB decoding and displaying
2689 if (v->fieldtx_is_raw)
2690 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2691 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2692 if (v->acpred_is_raw)
2693 v->s.ac_pred = get_bits1(&v->s.gb);
2695 v->s.ac_pred = v->acpred_plane[mb_pos];
2697 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2698 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2702 s->current_picture.qscale_table[mb_pos] = mquant;
2703 /* Set DC scale - y and c use the same */
2704 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2705 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2707 for (k = 0; k < 6; k++) {
2708 v->mb_type[0][s->block_index[k]] = 1;
2710 val = ((cbp >> (5 - k)) & 1);
2713 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2717 cbp |= val << (5 - k);
2719 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2720 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2722 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2723 (k < 4) ? v->codingset : v->codingset2, mquant);
2725 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2727 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2730 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2731 ff_vc1_i_overlap_filter(v);
2732 vc1_put_blocks_clamped(v, 1);
2733 if (v->s.loop_filter)
2734 ff_vc1_i_loop_filter(v);
2736 if (get_bits_count(&s->gb) > v->bits) {
2737 // TODO: may need modification to handle slice coding
2738 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2739 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2740 get_bits_count(&s->gb), v->bits);
2743 inc_blk_idx(v->topleft_blk_idx);
2744 inc_blk_idx(v->top_blk_idx);
2745 inc_blk_idx(v->left_blk_idx);
2746 inc_blk_idx(v->cur_blk_idx);
2748 if (!v->s.loop_filter)
2749 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2751 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2752 s->first_slice_line = 0;
2755 if (v->s.loop_filter)
2756 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2757 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2758 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2761 static void vc1_decode_p_blocks(VC1Context *v)
2763 MpegEncContext *s = &v->s;
2764 int apply_loop_filter;
2766 /* select coding mode used for VLC tables selection */
2767 switch (v->c_ac_table_index) {
2769 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2772 v->codingset = CS_HIGH_MOT_INTRA;
2775 v->codingset = CS_MID_RATE_INTRA;
2779 switch (v->c_ac_table_index) {
2781 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2784 v->codingset2 = CS_HIGH_MOT_INTER;
2787 v->codingset2 = CS_MID_RATE_INTER;
2791 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2792 s->first_slice_line = 1;
2793 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2794 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2796 init_block_index(v);
2797 for (; s->mb_x < s->mb_width; s->mb_x++) {
2798 ff_update_block_index(s);
2800 if (v->fcm == ILACE_FIELD) {
2801 vc1_decode_p_mb_intfi(v);
2802 if (apply_loop_filter)
2803 ff_vc1_p_loop_filter(v);
2804 } else if (v->fcm == ILACE_FRAME) {
2805 vc1_decode_p_mb_intfr(v);
2806 if (apply_loop_filter)
2807 ff_vc1_p_intfr_loop_filter(v);
2810 if (apply_loop_filter)
2811 ff_vc1_p_loop_filter(v);
2813 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2814 // TODO: may need modification to handle slice coding
2815 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2816 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2817 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2820 inc_blk_idx(v->topleft_blk_idx);
2821 inc_blk_idx(v->top_blk_idx);
2822 inc_blk_idx(v->left_blk_idx);
2823 inc_blk_idx(v->cur_blk_idx);
2825 memmove(v->cbp_base,
2826 v->cbp - s->mb_stride,
2827 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2828 memmove(v->ttblk_base,
2829 v->ttblk - s->mb_stride,
2830 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2831 memmove(v->is_intra_base,
2832 v->is_intra - s->mb_stride,
2833 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2834 memmove(v->luma_mv_base,
2835 v->luma_mv - s->mb_stride,
2836 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2837 if (s->mb_y != s->start_mb_y)
2838 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2839 s->first_slice_line = 0;
2841 if (s->end_mb_y >= s->start_mb_y)
2842 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2843 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2844 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2847 static void vc1_decode_b_blocks(VC1Context *v)
2849 MpegEncContext *s = &v->s;
2851 /* select coding mode used for VLC tables selection */
2852 switch (v->c_ac_table_index) {
2854 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2857 v->codingset = CS_HIGH_MOT_INTRA;
2860 v->codingset = CS_MID_RATE_INTRA;
2864 switch (v->c_ac_table_index) {
2866 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2869 v->codingset2 = CS_HIGH_MOT_INTER;
2872 v->codingset2 = CS_MID_RATE_INTER;
2876 s->first_slice_line = 1;
2877 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2879 init_block_index(v);
2880 for (; s->mb_x < s->mb_width; s->mb_x++) {
2881 ff_update_block_index(s);
2883 if (v->fcm == ILACE_FIELD) {
2884 vc1_decode_b_mb_intfi(v);
2885 if (v->s.loop_filter)
2886 ff_vc1_b_intfi_loop_filter(v);
2887 } else if (v->fcm == ILACE_FRAME) {
2888 vc1_decode_b_mb_intfr(v);
2889 if (v->s.loop_filter)
2890 ff_vc1_p_intfr_loop_filter(v);
2893 if (v->s.loop_filter)
2894 ff_vc1_i_loop_filter(v);
2896 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2897 // TODO: may need modification to handle slice coding
2898 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2899 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2900 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2904 memmove(v->cbp_base,
2905 v->cbp - s->mb_stride,
2906 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2907 memmove(v->ttblk_base,
2908 v->ttblk - s->mb_stride,
2909 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2910 memmove(v->is_intra_base,
2911 v->is_intra - s->mb_stride,
2912 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2913 if (!v->s.loop_filter)
2914 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2916 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2917 s->first_slice_line = 0;
2919 if (v->s.loop_filter)
2920 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2921 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2922 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2925 static void vc1_decode_skip_blocks(VC1Context *v)
2927 MpegEncContext *s = &v->s;
2929 if (!v->s.last_picture.f->data[0])
2932 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2933 s->first_slice_line = 1;
2934 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2936 init_block_index(v);
2937 ff_update_block_index(s);
2938 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2939 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2940 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2941 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2942 s->first_slice_line = 0;
2944 s->pict_type = AV_PICTURE_TYPE_P;
2947 void ff_vc1_decode_blocks(VC1Context *v)
2950 v->s.esc3_level_length = 0;
2952 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
2953 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
2954 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
2955 v->s.loop_filter, v->s.low_delay);
2957 ff_er_add_slice(&v->s.er, 0, 0,
2958 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
2962 v->left_blk_idx = -1;
2963 v->topleft_blk_idx = 1;
2965 switch (v->s.pict_type) {
2966 case AV_PICTURE_TYPE_I:
2967 if (v->profile == PROFILE_ADVANCED)
2968 vc1_decode_i_blocks_adv(v);
2970 vc1_decode_i_blocks(v);
2972 case AV_PICTURE_TYPE_P:
2973 if (v->p_frame_skipped)
2974 vc1_decode_skip_blocks(v);
2976 vc1_decode_p_blocks(v);
2978 case AV_PICTURE_TYPE_B:
2980 if (v->profile == PROFILE_ADVANCED)
2981 vc1_decode_i_blocks_adv(v);
2983 vc1_decode_i_blocks(v);
2985 vc1_decode_b_blocks(v);