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 = (int)((unsigned)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 = (int)((unsigned)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 = (int)((unsigned)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 int 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);
520 if (index != ff_vc1_ac_sizes[codingset] - 1) {
521 run = vc1_index_decode_table[codingset][index][0];
522 level = vc1_index_decode_table[codingset][index][1];
523 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
524 sign = get_bits1(gb);
526 int escape = decode210(gb);
528 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
529 if (index >= ff_vc1_ac_sizes[codingset] - 1U)
530 return AVERROR_INVALIDDATA;
531 run = vc1_index_decode_table[codingset][index][0];
532 level = vc1_index_decode_table[codingset][index][1];
533 lst = index >= vc1_last_decode_table[codingset];
536 level += vc1_last_delta_level_table[codingset][run];
538 level += vc1_delta_level_table[codingset][run];
541 run += vc1_last_delta_run_table[codingset][level] + 1;
543 run += vc1_delta_run_table[codingset][level] + 1;
545 sign = get_bits1(gb);
548 if (v->s.esc3_level_length == 0) {
549 if (v->pq < 8 || v->dquantfrm) { // table 59
550 v->s.esc3_level_length = get_bits(gb, 3);
551 if (!v->s.esc3_level_length)
552 v->s.esc3_level_length = get_bits(gb, 2) + 8;
554 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
556 v->s.esc3_run_length = 3 + get_bits(gb, 2);
558 run = get_bits(gb, v->s.esc3_run_length);
559 sign = get_bits1(gb);
560 level = get_bits(gb, v->s.esc3_level_length);
566 *value = (level ^ -sign) + sign;
571 /** Decode intra block in intra frames - should be faster than decode_intra_block
572 * @param v VC1Context
573 * @param block block to decode
574 * @param[in] n subblock index
575 * @param coded are AC coeffs present or not
576 * @param codingset set of VLC to decode data
578 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
579 int coded, int codingset)
581 GetBitContext *gb = &v->s.gb;
582 MpegEncContext *s = &v->s;
583 int dc_pred_dir = 0; /* Direction of the DC prediction used */
586 int16_t *ac_val, *ac_val2;
589 /* Get DC differential */
591 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
593 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
596 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
597 if (dcdiff == 119 /* ESC index value */) {
598 dcdiff = get_bits(gb, 8 + m);
601 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
608 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
611 /* Store the quantized DC coeff, used for prediction */
613 scale = s->y_dc_scale;
615 scale = s->c_dc_scale;
616 block[0] = dcdiff * scale;
618 ac_val = s->ac_val[0][s->block_index[n]];
620 if (dc_pred_dir) // left
623 ac_val -= 16 * s->block_wrap[n];
625 scale = v->pq * 2 + v->halfpq;
631 int last = 0, skip, value;
632 const uint8_t *zz_table;
637 zz_table = v->zz_8x8[2];
639 zz_table = v->zz_8x8[3];
641 zz_table = v->zz_8x8[1];
644 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
650 block[zz_table[i++]] = value;
653 /* apply AC prediction if needed */
656 if (dc_pred_dir) { // left
662 for (k = 1; k < 8; k++)
663 block[k << sh] += ac_val[k];
665 /* save AC coeffs for further prediction */
666 for (k = 1; k < 8; k++) {
667 ac_val2[k] = block[k << v->left_blk_sh];
668 ac_val2[k + 8] = block[k << v->top_blk_sh];
671 /* scale AC coeffs */
672 for (k = 1; k < 64; k++)
676 block[k] += (block[k] < 0) ? -v->pq : v->pq;
682 memset(ac_val2, 0, 16 * 2);
684 /* apply AC prediction if needed */
687 if (dc_pred_dir) { //left
694 memcpy(ac_val2, ac_val, 8 * 2);
695 for (k = 1; k < 8; k++) {
696 block[k << sh] = ac_val[k] * scale;
697 if (!v->pquantizer && block[k << sh])
698 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
702 if (s->ac_pred) i = 63;
703 s->block_last_index[n] = i;
708 /** Decode intra block in intra frames - should be faster than decode_intra_block
709 * @param v VC1Context
710 * @param block block to decode
711 * @param[in] n subblock number
712 * @param coded are AC coeffs present or not
713 * @param codingset set of VLC to decode data
714 * @param mquant quantizer value for this macroblock
716 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
717 int coded, int codingset, int mquant)
719 GetBitContext *gb = &v->s.gb;
720 MpegEncContext *s = &v->s;
721 int dc_pred_dir = 0; /* Direction of the DC prediction used */
723 int16_t *dc_val = NULL;
724 int16_t *ac_val, *ac_val2;
726 int a_avail = v->a_avail, c_avail = v->c_avail;
727 int use_pred = s->ac_pred;
730 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
731 int quant = FFABS(mquant);
733 /* Get DC differential */
735 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
737 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
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 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
821 block[zz_table[i++]] = value;
824 /* apply AC prediction if needed */
827 if (dc_pred_dir) { // left
833 /* scale predictors if needed*/
834 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
836 return AVERROR_INVALIDDATA;
838 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
839 if (q2 && q1 != q2) {
840 for (k = 1; k < 8; k++)
841 block[k << sh] += (int)(ac_val[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
843 for (k = 1; k < 8; k++)
844 block[k << sh] += ac_val[k];
847 /* save AC coeffs for further prediction */
848 for (k = 1; k < 8; k++) {
849 ac_val2[k ] = block[k << v->left_blk_sh];
850 ac_val2[k + 8] = block[k << v->top_blk_sh];
853 /* scale AC coeffs */
854 for (k = 1; k < 64; k++)
858 block[k] += (block[k] < 0) ? -quant : quant;
861 } else { // no AC coeffs
864 memset(ac_val2, 0, 16 * 2);
866 /* apply AC prediction if needed */
869 if (dc_pred_dir) { // left
876 memcpy(ac_val2, ac_val, 8 * 2);
877 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
879 return AVERROR_INVALIDDATA;
881 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
882 if (q2 && q1 != q2) {
883 for (k = 1; k < 8; k++)
884 ac_val2[k] = (int)(ac_val2[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
886 for (k = 1; k < 8; k++) {
887 block[k << sh] = ac_val2[k] * scale;
888 if (!v->pquantizer && block[k << sh])
889 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
893 if (use_pred) i = 63;
894 s->block_last_index[n] = i;
899 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
900 * @param v VC1Context
901 * @param block block to decode
902 * @param[in] n subblock index
903 * @param coded are AC coeffs present or not
904 * @param mquant block quantizer
905 * @param codingset set of VLC to decode data
907 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
908 int coded, int mquant, int codingset)
910 GetBitContext *gb = &v->s.gb;
911 MpegEncContext *s = &v->s;
912 int dc_pred_dir = 0; /* Direction of the DC prediction used */
914 int16_t *dc_val = NULL;
915 int16_t *ac_val, *ac_val2;
917 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
918 int a_avail = v->a_avail, c_avail = v->c_avail;
919 int use_pred = s->ac_pred;
922 int quant = FFABS(mquant);
924 s->bdsp.clear_block(block);
926 /* XXX: Guard against dumb values of mquant */
927 quant = av_clip_uintp2(quant, 5);
929 /* Set DC scale - y and c use the same */
930 s->y_dc_scale = s->y_dc_scale_table[quant];
931 s->c_dc_scale = s->c_dc_scale_table[quant];
933 /* Get DC differential */
935 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
937 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
940 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
941 if (dcdiff == 119 /* ESC index value */) {
942 dcdiff = get_bits(gb, 8 + m);
945 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
952 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
955 /* Store the quantized DC coeff, used for prediction */
958 block[0] = dcdiff * s->y_dc_scale;
960 block[0] = dcdiff * s->c_dc_scale;
966 /* check if AC is needed at all and adjust direction if needed */
967 if (!a_avail) dc_pred_dir = 1;
968 if (!c_avail) dc_pred_dir = 0;
969 if (!a_avail && !c_avail) use_pred = 0;
970 ac_val = s->ac_val[0][s->block_index[n]];
973 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
975 if (dc_pred_dir) //left
978 ac_val -= 16 * s->block_wrap[n];
980 q1 = s->current_picture.qscale_table[mb_pos];
981 if (dc_pred_dir && c_avail && mb_pos)
982 q2 = s->current_picture.qscale_table[mb_pos - 1];
983 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
984 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
985 if (dc_pred_dir && n == 1)
987 if (!dc_pred_dir && n == 2)
992 int last = 0, skip, value;
996 int ret = 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] += (int)(ac_val[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1029 for (k = 1; k < 8; k++)
1030 block[k << v->top_blk_sh] += (int)(ac_val[k + 8] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
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] = (int)(ac_val2[k] * (unsigned)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] = (int)(ac_val2[k + 8] * (unsigned)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 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1171 idx = v->zz_8x8[0][i++];
1173 idx = v->zzi_8x8[i++];
1174 block[idx] = value * scale;
1176 block[idx] += (block[idx] < 0) ? -quant : quant;
1180 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1182 v->vc1dsp.vc1_inv_trans_8x8(block);
1183 s->idsp.add_pixels_clamped(block, dst, linesize);
1188 pat = ~subblkpat & 0xF;
1189 for (j = 0; j < 4; j++) {
1190 last = subblkpat & (1 << (3 - j));
1192 off = (j & 1) * 4 + (j & 2) * 16;
1194 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1201 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1203 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1204 block[idx + off] = value * scale;
1206 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1208 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1210 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1212 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1217 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1218 for (j = 0; j < 2; j++) {
1219 last = subblkpat & (1 << (1 - j));
1223 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1230 idx = v->zz_8x4[i++] + off;
1232 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1233 block[idx] = value * scale;
1235 block[idx] += (block[idx] < 0) ? -quant : quant;
1237 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1239 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1241 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1246 pat = ~(subblkpat * 5) & 0xF;
1247 for (j = 0; j < 2; j++) {
1248 last = subblkpat & (1 << (1 - j));
1252 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1259 idx = v->zz_4x8[i++] + off;
1261 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1262 block[idx] = value * scale;
1264 block[idx] += (block[idx] < 0) ? -quant : quant;
1266 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1268 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1270 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1276 *ttmb_out |= ttblk << (n * 4);
1280 /** @} */ // Macroblock group
1282 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1284 /** Decode one P-frame MB
1286 static int vc1_decode_p_mb(VC1Context *v)
1288 MpegEncContext *s = &v->s;
1289 GetBitContext *gb = &s->gb;
1291 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1292 int cbp; /* cbp decoding stuff */
1293 int mqdiff, mquant; /* MB quantization */
1294 int ttmb = v->ttfrm; /* MB Transform type */
1296 int mb_has_coeffs = 1; /* last_flag */
1297 int dmv_x, dmv_y; /* Differential MV components */
1298 int index, index1; /* LUT indexes */
1299 int val, sign; /* temp values */
1300 int first_block = 1;
1302 int skipped, fourmv;
1303 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1305 mquant = v->pq; /* lossy initialization */
1307 if (v->mv_type_is_raw)
1308 fourmv = get_bits1(gb);
1310 fourmv = v->mv_type_mb_plane[mb_pos];
1312 skipped = get_bits1(gb);
1314 skipped = v->s.mbskip_table[mb_pos];
1316 if (!fourmv) { /* 1MV mode */
1318 GET_MVDATA(dmv_x, dmv_y);
1321 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1322 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1324 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1325 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1327 /* FIXME Set DC val for inter block ? */
1328 if (s->mb_intra && !mb_has_coeffs) {
1330 s->ac_pred = get_bits1(gb);
1332 } else if (mb_has_coeffs) {
1334 s->ac_pred = get_bits1(gb);
1335 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1341 s->current_picture.qscale_table[mb_pos] = mquant;
1343 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1344 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1345 VC1_TTMB_VLC_BITS, 2);
1346 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1348 for (i = 0; i < 6; i++) {
1349 s->dc_val[0][s->block_index[i]] = 0;
1351 val = ((cbp >> (5 - i)) & 1);
1352 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1353 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1355 /* check if prediction blocks A and C are available */
1356 v->a_avail = v->c_avail = 0;
1357 if (i == 2 || i == 3 || !s->first_slice_line)
1358 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1359 if (i == 1 || i == 3 || s->mb_x)
1360 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1362 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1363 (i & 4) ? v->codingset2 : v->codingset);
1364 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1366 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1368 for (j = 0; j < 64; j++)
1369 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1370 block_cbp |= 0xF << (i << 2);
1371 block_intra |= 1 << i;
1373 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1374 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1375 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1378 block_cbp |= pat << (i << 2);
1379 if (!v->ttmbf && ttmb < 8)
1386 for (i = 0; i < 6; i++) {
1387 v->mb_type[0][s->block_index[i]] = 0;
1388 s->dc_val[0][s->block_index[i]] = 0;
1390 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1391 s->current_picture.qscale_table[mb_pos] = 0;
1392 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1393 ff_vc1_mc_1mv(v, 0);
1395 } else { // 4MV mode
1396 if (!skipped /* unskipped MB */) {
1397 int intra_count = 0, coded_inter = 0;
1398 int is_intra[6], is_coded[6];
1400 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1401 for (i = 0; i < 6; i++) {
1402 val = ((cbp >> (5 - i)) & 1);
1403 s->dc_val[0][s->block_index[i]] = 0;
1410 GET_MVDATA(dmv_x, dmv_y);
1412 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1414 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1415 intra_count += s->mb_intra;
1416 is_intra[i] = s->mb_intra;
1417 is_coded[i] = mb_has_coeffs;
1420 is_intra[i] = (intra_count >= 3);
1424 ff_vc1_mc_4mv_chroma(v, 0);
1425 v->mb_type[0][s->block_index[i]] = is_intra[i];
1427 coded_inter = !is_intra[i] & is_coded[i];
1429 // if there are no coded blocks then don't do anything more
1431 if (!intra_count && !coded_inter)
1434 s->current_picture.qscale_table[mb_pos] = mquant;
1435 /* test if block is intra and has pred */
1438 for (i = 0; i < 6; i++)
1440 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1441 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1447 s->ac_pred = get_bits1(gb);
1451 if (!v->ttmbf && coded_inter)
1452 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1453 for (i = 0; i < 6; i++) {
1455 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1456 s->mb_intra = is_intra[i];
1458 /* check if prediction blocks A and C are available */
1459 v->a_avail = v->c_avail = 0;
1460 if (i == 2 || i == 3 || !s->first_slice_line)
1461 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1462 if (i == 1 || i == 3 || s->mb_x)
1463 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1465 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1466 (i & 4) ? v->codingset2 : v->codingset);
1467 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1469 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1471 for (j = 0; j < 64; j++)
1472 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1473 block_cbp |= 0xF << (i << 2);
1474 block_intra |= 1 << i;
1475 } else if (is_coded[i]) {
1476 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1477 first_block, s->dest[dst_idx] + off,
1478 (i & 4) ? s->uvlinesize : s->linesize,
1479 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1483 block_cbp |= pat << (i << 2);
1484 if (!v->ttmbf && ttmb < 8)
1489 } else { // skipped MB
1491 s->current_picture.qscale_table[mb_pos] = 0;
1492 for (i = 0; i < 6; i++) {
1493 v->mb_type[0][s->block_index[i]] = 0;
1494 s->dc_val[0][s->block_index[i]] = 0;
1496 for (i = 0; i < 4; i++) {
1497 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1498 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1500 ff_vc1_mc_4mv_chroma(v, 0);
1501 s->current_picture.qscale_table[mb_pos] = 0;
1505 if (v->overlap && v->pq >= 9)
1506 ff_vc1_p_overlap_filter(v);
1507 vc1_put_blocks_clamped(v, 1);
1509 v->cbp[s->mb_x] = block_cbp;
1510 v->ttblk[s->mb_x] = block_tt;
1511 v->is_intra[s->mb_x] = block_intra;
1516 /* Decode one macroblock in an interlaced frame p picture */
1518 static int vc1_decode_p_mb_intfr(VC1Context *v)
1520 MpegEncContext *s = &v->s;
1521 GetBitContext *gb = &s->gb;
1523 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1524 int cbp = 0; /* cbp decoding stuff */
1525 int mqdiff, mquant; /* MB quantization */
1526 int ttmb = v->ttfrm; /* MB Transform type */
1528 int mb_has_coeffs = 1; /* last_flag */
1529 int dmv_x, dmv_y; /* Differential MV components */
1530 int val; /* temp value */
1531 int first_block = 1;
1533 int skipped, fourmv = 0, twomv = 0;
1534 int block_cbp = 0, pat, block_tt = 0;
1535 int idx_mbmode = 0, mvbp;
1538 mquant = v->pq; /* Lossy initialization */
1541 skipped = get_bits1(gb);
1543 skipped = v->s.mbskip_table[mb_pos];
1545 if (v->fourmvswitch)
1546 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1548 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1549 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1550 /* store the motion vector type in a flag (useful later) */
1551 case MV_PMODE_INTFR_4MV:
1553 v->blk_mv_type[s->block_index[0]] = 0;
1554 v->blk_mv_type[s->block_index[1]] = 0;
1555 v->blk_mv_type[s->block_index[2]] = 0;
1556 v->blk_mv_type[s->block_index[3]] = 0;
1558 case MV_PMODE_INTFR_4MV_FIELD:
1560 v->blk_mv_type[s->block_index[0]] = 1;
1561 v->blk_mv_type[s->block_index[1]] = 1;
1562 v->blk_mv_type[s->block_index[2]] = 1;
1563 v->blk_mv_type[s->block_index[3]] = 1;
1565 case MV_PMODE_INTFR_2MV_FIELD:
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;
1572 case MV_PMODE_INTFR_1MV:
1573 v->blk_mv_type[s->block_index[0]] = 0;
1574 v->blk_mv_type[s->block_index[1]] = 0;
1575 v->blk_mv_type[s->block_index[2]] = 0;
1576 v->blk_mv_type[s->block_index[3]] = 0;
1579 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1580 for (i = 0; i < 4; i++) {
1581 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1582 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1584 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1586 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1587 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1588 mb_has_coeffs = get_bits1(gb);
1590 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1591 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1593 s->current_picture.qscale_table[mb_pos] = mquant;
1594 /* Set DC scale - y and c use the same (not sure if necessary here) */
1595 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1596 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1598 for (i = 0; i < 6; i++) {
1599 v->a_avail = v->c_avail = 0;
1600 v->mb_type[0][s->block_index[i]] = 1;
1601 s->dc_val[0][s->block_index[i]] = 0;
1603 val = ((cbp >> (5 - i)) & 1);
1604 if (i == 2 || i == 3 || !s->first_slice_line)
1605 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1606 if (i == 1 || i == 3 || s->mb_x)
1607 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1609 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1610 (i & 4) ? v->codingset2 : v->codingset);
1611 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1613 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1615 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1618 block_cbp |= 0xf << (i << 2);
1621 } else { // inter MB
1622 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1624 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1625 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1626 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1628 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1629 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1630 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1633 s->mb_intra = v->is_intra[s->mb_x] = 0;
1634 for (i = 0; i < 6; i++)
1635 v->mb_type[0][s->block_index[i]] = 0;
1636 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1637 /* for all motion vector read MVDATA and motion compensate each block */
1641 for (i = 0; i < 4; i++) {
1643 if (mvbp & (8 >> i))
1644 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1645 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1646 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1648 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1653 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1655 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1656 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1657 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1660 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1662 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1663 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1664 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1665 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1667 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1670 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1672 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1673 ff_vc1_mc_1mv(v, 0);
1676 GET_MQUANT(); // p. 227
1677 s->current_picture.qscale_table[mb_pos] = mquant;
1678 if (!v->ttmbf && cbp)
1679 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1680 for (i = 0; i < 6; i++) {
1681 s->dc_val[0][s->block_index[i]] = 0;
1683 val = ((cbp >> (5 - i)) & 1);
1685 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1687 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1689 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1690 first_block, s->dest[dst_idx] + off,
1691 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1692 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1695 block_cbp |= pat << (i << 2);
1696 if (!v->ttmbf && ttmb < 8)
1703 s->mb_intra = v->is_intra[s->mb_x] = 0;
1704 for (i = 0; i < 6; i++) {
1705 v->mb_type[0][s->block_index[i]] = 0;
1706 s->dc_val[0][s->block_index[i]] = 0;
1708 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1709 s->current_picture.qscale_table[mb_pos] = 0;
1710 v->blk_mv_type[s->block_index[0]] = 0;
1711 v->blk_mv_type[s->block_index[1]] = 0;
1712 v->blk_mv_type[s->block_index[2]] = 0;
1713 v->blk_mv_type[s->block_index[3]] = 0;
1714 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1715 ff_vc1_mc_1mv(v, 0);
1716 v->fieldtx_plane[mb_pos] = 0;
1718 if (v->overlap && v->pq >= 9)
1719 ff_vc1_p_overlap_filter(v);
1720 vc1_put_blocks_clamped(v, 1);
1722 v->cbp[s->mb_x] = block_cbp;
1723 v->ttblk[s->mb_x] = block_tt;
1728 static int vc1_decode_p_mb_intfi(VC1Context *v)
1730 MpegEncContext *s = &v->s;
1731 GetBitContext *gb = &s->gb;
1733 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1734 int cbp = 0; /* cbp decoding stuff */
1735 int mqdiff, mquant; /* MB quantization */
1736 int ttmb = v->ttfrm; /* MB Transform type */
1738 int mb_has_coeffs = 1; /* last_flag */
1739 int dmv_x, dmv_y; /* Differential MV components */
1740 int val; /* temp values */
1741 int first_block = 1;
1744 int block_cbp = 0, pat, block_tt = 0;
1747 mquant = v->pq; /* Lossy initialization */
1749 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1750 if (idx_mbmode <= 1) { // intra MB
1751 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1753 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1754 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1755 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1757 s->current_picture.qscale_table[mb_pos] = mquant;
1758 /* Set DC scale - y and c use the same (not sure if necessary here) */
1759 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1760 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1761 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1762 mb_has_coeffs = idx_mbmode & 1;
1764 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1766 for (i = 0; i < 6; i++) {
1767 v->a_avail = v->c_avail = 0;
1768 v->mb_type[0][s->block_index[i]] = 1;
1769 s->dc_val[0][s->block_index[i]] = 0;
1771 val = ((cbp >> (5 - i)) & 1);
1772 if (i == 2 || i == 3 || !s->first_slice_line)
1773 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1774 if (i == 1 || i == 3 || s->mb_x)
1775 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1777 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1778 (i & 4) ? v->codingset2 : v->codingset);
1779 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1781 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1782 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1783 block_cbp |= 0xf << (i << 2);
1786 s->mb_intra = v->is_intra[s->mb_x] = 0;
1787 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1788 for (i = 0; i < 6; i++)
1789 v->mb_type[0][s->block_index[i]] = 0;
1790 if (idx_mbmode <= 5) { // 1-MV
1791 dmv_x = dmv_y = pred_flag = 0;
1792 if (idx_mbmode & 1) {
1793 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1795 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1796 ff_vc1_mc_1mv(v, 0);
1797 mb_has_coeffs = !(idx_mbmode & 2);
1799 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1800 for (i = 0; i < 4; i++) {
1801 dmv_x = dmv_y = pred_flag = 0;
1802 if (v->fourmvbp & (8 >> i))
1803 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1804 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1805 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1807 ff_vc1_mc_4mv_chroma(v, 0);
1808 mb_has_coeffs = idx_mbmode & 1;
1811 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1815 s->current_picture.qscale_table[mb_pos] = mquant;
1816 if (!v->ttmbf && cbp) {
1817 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1820 for (i = 0; i < 6; i++) {
1821 s->dc_val[0][s->block_index[i]] = 0;
1823 val = ((cbp >> (5 - i)) & 1);
1824 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1826 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1827 first_block, s->dest[dst_idx] + off,
1828 (i & 4) ? s->uvlinesize : s->linesize,
1829 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1833 block_cbp |= pat << (i << 2);
1834 if (!v->ttmbf && ttmb < 8)
1840 if (v->overlap && v->pq >= 9)
1841 ff_vc1_p_overlap_filter(v);
1842 vc1_put_blocks_clamped(v, 1);
1844 v->cbp[s->mb_x] = block_cbp;
1845 v->ttblk[s->mb_x] = block_tt;
1850 /** Decode one B-frame MB (in Main profile)
1852 static int vc1_decode_b_mb(VC1Context *v)
1854 MpegEncContext *s = &v->s;
1855 GetBitContext *gb = &s->gb;
1857 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1858 int cbp = 0; /* cbp decoding stuff */
1859 int mqdiff, mquant; /* MB quantization */
1860 int ttmb = v->ttfrm; /* MB Transform type */
1861 int mb_has_coeffs = 0; /* last_flag */
1862 int index, index1; /* LUT indexes */
1863 int val, sign; /* temp values */
1864 int first_block = 1;
1866 int skipped, direct;
1867 int dmv_x[2], dmv_y[2];
1868 int bmvtype = BMV_TYPE_BACKWARD;
1870 mquant = v->pq; /* lossy initialization */
1874 direct = get_bits1(gb);
1876 direct = v->direct_mb_plane[mb_pos];
1878 skipped = get_bits1(gb);
1880 skipped = v->s.mbskip_table[mb_pos];
1882 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1883 for (i = 0; i < 6; i++) {
1884 v->mb_type[0][s->block_index[i]] = 0;
1885 s->dc_val[0][s->block_index[i]] = 0;
1887 s->current_picture.qscale_table[mb_pos] = 0;
1891 GET_MVDATA(dmv_x[0], dmv_y[0]);
1892 dmv_x[1] = dmv_x[0];
1893 dmv_y[1] = dmv_y[0];
1895 if (skipped || !s->mb_intra) {
1896 bmvtype = decode012(gb);
1899 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1902 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1905 bmvtype = BMV_TYPE_INTERPOLATED;
1906 dmv_x[0] = dmv_y[0] = 0;
1910 for (i = 0; i < 6; i++)
1911 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1915 bmvtype = BMV_TYPE_INTERPOLATED;
1916 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1917 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1921 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1924 s->current_picture.qscale_table[mb_pos] = mquant;
1926 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1927 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1928 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1929 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1931 if (!mb_has_coeffs && !s->mb_intra) {
1932 /* no coded blocks - effectively skipped */
1933 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1934 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1937 if (s->mb_intra && !mb_has_coeffs) {
1939 s->current_picture.qscale_table[mb_pos] = mquant;
1940 s->ac_pred = get_bits1(gb);
1942 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1944 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1945 GET_MVDATA(dmv_x[0], dmv_y[0]);
1946 if (!mb_has_coeffs) {
1947 /* interpolated skipped block */
1948 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1949 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1953 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1955 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1958 s->ac_pred = get_bits1(gb);
1959 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1961 s->current_picture.qscale_table[mb_pos] = mquant;
1962 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1963 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1967 for (i = 0; i < 6; i++) {
1968 s->dc_val[0][s->block_index[i]] = 0;
1970 val = ((cbp >> (5 - i)) & 1);
1971 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1972 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1974 /* check if prediction blocks A and C are available */
1975 v->a_avail = v->c_avail = 0;
1976 if (i == 2 || i == 3 || !s->first_slice_line)
1977 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1978 if (i == 1 || i == 3 || s->mb_x)
1979 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1981 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1982 (i & 4) ? v->codingset2 : v->codingset);
1983 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1985 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1987 for (j = 0; j < 64; j++)
1988 s->block[i][j] *= 2;
1989 s->idsp.put_signed_pixels_clamped(s->block[i],
1990 s->dest[dst_idx] + off,
1991 i & 4 ? s->uvlinesize
1994 int pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1995 first_block, s->dest[dst_idx] + off,
1996 (i & 4) ? s->uvlinesize : s->linesize,
1997 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2000 if (!v->ttmbf && ttmb < 8)
2008 /** Decode one B-frame MB (in interlaced field B picture)
2010 static int vc1_decode_b_mb_intfi(VC1Context *v)
2012 MpegEncContext *s = &v->s;
2013 GetBitContext *gb = &s->gb;
2015 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2016 int cbp = 0; /* cbp decoding stuff */
2017 int mqdiff, mquant; /* MB quantization */
2018 int ttmb = v->ttfrm; /* MB Transform type */
2019 int mb_has_coeffs = 0; /* last_flag */
2020 int val; /* temp value */
2021 int first_block = 1;
2024 int dmv_x[2], dmv_y[2], pred_flag[2];
2025 int bmvtype = BMV_TYPE_BACKWARD;
2026 int block_cbp = 0, pat, block_tt = 0;
2029 mquant = v->pq; /* Lossy initialization */
2032 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2033 if (idx_mbmode <= 1) { // intra MB
2034 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2036 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2037 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2038 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2040 s->current_picture.qscale_table[mb_pos] = mquant;
2041 /* Set DC scale - y and c use the same (not sure if necessary here) */
2042 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2043 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2044 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2045 mb_has_coeffs = idx_mbmode & 1;
2047 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2049 for (i = 0; i < 6; i++) {
2050 v->a_avail = v->c_avail = 0;
2051 v->mb_type[0][s->block_index[i]] = 1;
2052 s->dc_val[0][s->block_index[i]] = 0;
2054 val = ((cbp >> (5 - i)) & 1);
2055 if (i == 2 || i == 3 || !s->first_slice_line)
2056 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2057 if (i == 1 || i == 3 || s->mb_x)
2058 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2060 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2061 (i & 4) ? v->codingset2 : v->codingset);
2062 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2064 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2066 for (j = 0; j < 64; j++)
2067 s->block[i][j] <<= 1;
2068 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2069 s->idsp.put_signed_pixels_clamped(s->block[i],
2070 s->dest[dst_idx] + off,
2071 (i & 4) ? s->uvlinesize
2075 s->mb_intra = v->is_intra[s->mb_x] = 0;
2076 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2077 for (i = 0; i < 6; i++)
2078 v->mb_type[0][s->block_index[i]] = 0;
2080 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2082 fwd = v->forward_mb_plane[mb_pos];
2083 if (idx_mbmode <= 5) { // 1-MV
2085 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2086 pred_flag[0] = pred_flag[1] = 0;
2088 bmvtype = BMV_TYPE_FORWARD;
2090 bmvtype = decode012(gb);
2093 bmvtype = BMV_TYPE_BACKWARD;
2096 bmvtype = BMV_TYPE_DIRECT;
2099 bmvtype = BMV_TYPE_INTERPOLATED;
2100 interpmvp = get_bits1(gb);
2103 v->bmvtype = bmvtype;
2104 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2105 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2108 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2110 if (bmvtype == BMV_TYPE_DIRECT) {
2111 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2112 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2113 if (!s->next_picture_ptr->field_picture) {
2114 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2115 return AVERROR_INVALIDDATA;
2118 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2119 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2120 mb_has_coeffs = !(idx_mbmode & 2);
2123 bmvtype = BMV_TYPE_FORWARD;
2124 v->bmvtype = bmvtype;
2125 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2126 for (i = 0; i < 4; i++) {
2127 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2128 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2129 if (v->fourmvbp & (8 >> i)) {
2130 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2131 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2132 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2134 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2135 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2137 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2138 mb_has_coeffs = idx_mbmode & 1;
2141 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2145 s->current_picture.qscale_table[mb_pos] = mquant;
2146 if (!v->ttmbf && cbp) {
2147 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2150 for (i = 0; i < 6; i++) {
2151 s->dc_val[0][s->block_index[i]] = 0;
2153 val = ((cbp >> (5 - i)) & 1);
2154 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2156 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2157 first_block, s->dest[dst_idx] + off,
2158 (i & 4) ? s->uvlinesize : s->linesize,
2159 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2162 block_cbp |= pat << (i << 2);
2163 if (!v->ttmbf && ttmb < 8)
2169 v->cbp[s->mb_x] = block_cbp;
2170 v->ttblk[s->mb_x] = block_tt;
2175 /** Decode one B-frame MB (in interlaced frame B picture)
2177 static int vc1_decode_b_mb_intfr(VC1Context *v)
2179 MpegEncContext *s = &v->s;
2180 GetBitContext *gb = &s->gb;
2182 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2183 int cbp = 0; /* cbp decoding stuff */
2184 int mqdiff, mquant; /* MB quantization */
2185 int ttmb = v->ttfrm; /* MB Transform type */
2186 int mvsw = 0; /* motion vector switch */
2187 int mb_has_coeffs = 1; /* last_flag */
2188 int dmv_x, dmv_y; /* Differential MV components */
2189 int val; /* temp value */
2190 int first_block = 1;
2192 int skipped, direct, twomv = 0;
2193 int block_cbp = 0, pat, block_tt = 0;
2194 int idx_mbmode = 0, mvbp;
2195 int stride_y, fieldtx;
2196 int bmvtype = BMV_TYPE_BACKWARD;
2199 mquant = v->pq; /* Lossy initialization */
2202 skipped = get_bits1(gb);
2204 skipped = v->s.mbskip_table[mb_pos];
2207 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2208 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2210 v->blk_mv_type[s->block_index[0]] = 1;
2211 v->blk_mv_type[s->block_index[1]] = 1;
2212 v->blk_mv_type[s->block_index[2]] = 1;
2213 v->blk_mv_type[s->block_index[3]] = 1;
2215 v->blk_mv_type[s->block_index[0]] = 0;
2216 v->blk_mv_type[s->block_index[1]] = 0;
2217 v->blk_mv_type[s->block_index[2]] = 0;
2218 v->blk_mv_type[s->block_index[3]] = 0;
2222 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2223 for (i = 0; i < 4; i++) {
2224 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2225 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2226 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2227 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2229 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2231 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2232 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2233 mb_has_coeffs = get_bits1(gb);
2235 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2236 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2238 s->current_picture.qscale_table[mb_pos] = mquant;
2239 /* Set DC scale - y and c use the same (not sure if necessary here) */
2240 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2241 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2243 for (i = 0; i < 6; i++) {
2244 v->a_avail = v->c_avail = 0;
2245 v->mb_type[0][s->block_index[i]] = 1;
2246 s->dc_val[0][s->block_index[i]] = 0;
2248 val = ((cbp >> (5 - i)) & 1);
2249 if (i == 2 || i == 3 || !s->first_slice_line)
2250 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2251 if (i == 1 || i == 3 || s->mb_x)
2252 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2254 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2255 (i & 4) ? v->codingset2 : v->codingset);
2256 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2258 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2260 stride_y = s->linesize << fieldtx;
2261 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2263 stride_y = s->uvlinesize;
2266 s->idsp.put_signed_pixels_clamped(s->block[i],
2267 s->dest[dst_idx] + off,
2271 s->mb_intra = v->is_intra[s->mb_x] = 0;
2274 direct = get_bits1(gb);
2276 direct = v->direct_mb_plane[mb_pos];
2279 if (s->next_picture_ptr->field_picture)
2280 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2281 s->mv[0][0][0] = s->current_picture.motion_val[0][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 0, s->quarter_sample);
2282 s->mv[0][0][1] = s->current_picture.motion_val[0][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 0, s->quarter_sample);
2283 s->mv[1][0][0] = s->current_picture.motion_val[1][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 1, s->quarter_sample);
2284 s->mv[1][0][1] = s->current_picture.motion_val[1][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 1, s->quarter_sample);
2287 s->mv[0][2][0] = s->current_picture.motion_val[0][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 0, s->quarter_sample);
2288 s->mv[0][2][1] = s->current_picture.motion_val[0][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 0, s->quarter_sample);
2289 s->mv[1][2][0] = s->current_picture.motion_val[1][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 1, s->quarter_sample);
2290 s->mv[1][2][1] = s->current_picture.motion_val[1][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 1, s->quarter_sample);
2292 for (i = 1; i < 4; i += 2) {
2293 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2294 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2295 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2296 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2299 for (i = 1; i < 4; i++) {
2300 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2301 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2302 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2303 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2309 if (skipped || !s->mb_intra) {
2310 bmvtype = decode012(gb);
2313 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2316 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2319 bmvtype = BMV_TYPE_INTERPOLATED;
2323 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2324 mvsw = get_bits1(gb);
2327 if (!skipped) { // inter MB
2328 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2330 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2332 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2333 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2334 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2335 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2339 for (i = 0; i < 6; i++)
2340 v->mb_type[0][s->block_index[i]] = 0;
2341 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2342 /* for all motion vector read MVDATA and motion compensate each block */
2346 for (i = 0; i < 4; i++) {
2347 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2348 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2350 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2351 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2353 ff_vc1_mc_1mv(v, 0);
2354 ff_vc1_interp_mc(v);
2356 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2358 for (i = 0; i < 4; i++) {
2361 val = ((mvbp >> (3 - i)) & 1);
2363 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2365 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2366 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2367 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2370 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2371 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2372 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2376 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2378 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2379 ff_vc1_mc_1mv(v, 0);
2383 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2385 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2386 ff_vc1_interp_mc(v);
2388 dir = bmvtype == BMV_TYPE_BACKWARD;
2395 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2396 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2400 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2401 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2404 for (i = 0; i < 2; i++) {
2405 s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
2406 s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
2407 s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
2408 s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
2411 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2412 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2415 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2416 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2417 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2418 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2419 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2421 dir = bmvtype == BMV_TYPE_BACKWARD;
2423 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2426 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2428 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2429 v->blk_mv_type[s->block_index[0]] = 1;
2430 v->blk_mv_type[s->block_index[1]] = 1;
2431 v->blk_mv_type[s->block_index[2]] = 1;
2432 v->blk_mv_type[s->block_index[3]] = 1;
2433 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2434 for (i = 0; i < 2; i++) {
2435 s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
2436 s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
2438 ff_vc1_mc_1mv(v, dir);
2442 GET_MQUANT(); // p. 227
2443 s->current_picture.qscale_table[mb_pos] = mquant;
2444 if (!v->ttmbf && cbp)
2445 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2446 for (i = 0; i < 6; i++) {
2447 s->dc_val[0][s->block_index[i]] = 0;
2449 val = ((cbp >> (5 - i)) & 1);
2451 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2453 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2455 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2456 first_block, s->dest[dst_idx] + off,
2457 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2458 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2461 block_cbp |= pat << (i << 2);
2462 if (!v->ttmbf && ttmb < 8)
2470 for (i = 0; i < 6; i++) {
2471 v->mb_type[0][s->block_index[i]] = 0;
2472 s->dc_val[0][s->block_index[i]] = 0;
2474 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2475 s->current_picture.qscale_table[mb_pos] = 0;
2476 v->blk_mv_type[s->block_index[0]] = 0;
2477 v->blk_mv_type[s->block_index[1]] = 0;
2478 v->blk_mv_type[s->block_index[2]] = 0;
2479 v->blk_mv_type[s->block_index[3]] = 0;
2482 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2483 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2484 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2486 dir = bmvtype == BMV_TYPE_BACKWARD;
2487 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2492 for (i = 0; i < 2; i++) {
2493 s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
2494 s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
2495 s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
2496 s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
2499 v->blk_mv_type[s->block_index[0]] = 1;
2500 v->blk_mv_type[s->block_index[1]] = 1;
2501 v->blk_mv_type[s->block_index[2]] = 1;
2502 v->blk_mv_type[s->block_index[3]] = 1;
2503 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2504 for (i = 0; i < 2; i++) {
2505 s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
2506 s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
2512 ff_vc1_mc_1mv(v, dir);
2513 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2514 ff_vc1_interp_mc(v);
2516 v->fieldtx_plane[mb_pos] = 0;
2519 v->cbp[s->mb_x] = block_cbp;
2520 v->ttblk[s->mb_x] = block_tt;
2525 /** Decode blocks of I-frame
2527 static void vc1_decode_i_blocks(VC1Context *v)
2530 MpegEncContext *s = &v->s;
2535 /* select coding mode used for VLC tables selection */
2536 switch (v->y_ac_table_index) {
2538 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2541 v->codingset = CS_HIGH_MOT_INTRA;
2544 v->codingset = CS_MID_RATE_INTRA;
2548 switch (v->c_ac_table_index) {
2550 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2553 v->codingset2 = CS_HIGH_MOT_INTER;
2556 v->codingset2 = CS_MID_RATE_INTER;
2560 /* Set DC scale - y and c use the same */
2561 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2562 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2565 s->mb_x = s->mb_y = 0;
2567 s->first_slice_line = 1;
2568 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2570 init_block_index(v);
2571 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2572 ff_update_block_index(s);
2573 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2574 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2575 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2576 s->current_picture.qscale_table[mb_pos] = v->pq;
2577 for (int i = 0; i < 4; i++) {
2578 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2579 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2582 // do actual MB decoding and displaying
2583 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2584 v->s.ac_pred = get_bits1(&v->s.gb);
2586 for (k = 0; k < 6; k++) {
2587 v->mb_type[0][s->block_index[k]] = 1;
2589 val = ((cbp >> (5 - k)) & 1);
2592 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2596 cbp |= val << (5 - k);
2598 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2600 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2602 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2605 if (v->overlap && v->pq >= 9) {
2606 ff_vc1_i_overlap_filter(v);
2608 for (k = 0; k < 6; k++)
2609 for (j = 0; j < 64; j++)
2610 v->block[v->cur_blk_idx][block_map[k]][j] *= 2;
2611 vc1_put_blocks_clamped(v, 1);
2614 for (k = 0; k < 6; k++)
2615 for (j = 0; j < 64; j++)
2616 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2;
2617 vc1_put_blocks_clamped(v, 0);
2620 if (v->s.loop_filter)
2621 ff_vc1_i_loop_filter(v);
2623 if (get_bits_left(&s->gb) < 0) {
2624 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2625 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2626 get_bits_count(&s->gb), s->gb.size_in_bits);
2630 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2631 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2632 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2633 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2635 if (!v->s.loop_filter)
2636 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2638 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2640 s->first_slice_line = 0;
2642 if (v->s.loop_filter)
2643 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2645 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2646 * profile, these only differ are when decoding MSS2 rectangles. */
2647 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2650 /** Decode blocks of I-frame for advanced profile
2652 static int vc1_decode_i_blocks_adv(VC1Context *v)
2655 MpegEncContext *s = &v->s;
2661 GetBitContext *gb = &s->gb;
2663 if (get_bits_left(gb) <= 1)
2664 return AVERROR_INVALIDDATA;
2666 /* select coding mode used for VLC tables selection */
2667 switch (v->y_ac_table_index) {
2669 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2672 v->codingset = CS_HIGH_MOT_INTRA;
2675 v->codingset = CS_MID_RATE_INTRA;
2679 switch (v->c_ac_table_index) {
2681 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2684 v->codingset2 = CS_HIGH_MOT_INTER;
2687 v->codingset2 = CS_MID_RATE_INTER;
2692 s->mb_x = s->mb_y = 0;
2694 s->first_slice_line = 1;
2695 s->mb_y = s->start_mb_y;
2696 if (s->start_mb_y) {
2698 init_block_index(v);
2699 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2700 (1 + s->b8_stride) * sizeof(*s->coded_block));
2702 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2704 init_block_index(v);
2705 for (;s->mb_x < s->mb_width; s->mb_x++) {
2707 ff_update_block_index(s);
2708 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2709 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2710 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2711 for (int i = 0; i < 4; i++) {
2712 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2713 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2716 // do actual MB decoding and displaying
2717 if (v->fieldtx_is_raw)
2718 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2719 if (get_bits_left(&v->s.gb) <= 1) {
2720 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2724 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2725 if (v->acpred_is_raw)
2726 v->s.ac_pred = get_bits1(&v->s.gb);
2728 v->s.ac_pred = v->acpred_plane[mb_pos];
2730 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2731 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2735 s->current_picture.qscale_table[mb_pos] = mquant;
2736 /* Set DC scale - y and c use the same */
2737 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2738 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2740 for (k = 0; k < 6; k++) {
2741 v->mb_type[0][s->block_index[k]] = 1;
2743 val = ((cbp >> (5 - k)) & 1);
2746 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2750 cbp |= val << (5 - k);
2752 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2753 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2755 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2756 (k < 4) ? v->codingset : v->codingset2, mquant);
2758 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2760 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2763 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2764 ff_vc1_i_overlap_filter(v);
2765 vc1_put_blocks_clamped(v, 1);
2766 if (v->s.loop_filter)
2767 ff_vc1_i_loop_filter(v);
2769 if (get_bits_left(&s->gb) < 0) {
2770 // TODO: may need modification to handle slice coding
2771 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2772 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2773 get_bits_count(&s->gb), s->gb.size_in_bits);
2776 inc_blk_idx(v->topleft_blk_idx);
2777 inc_blk_idx(v->top_blk_idx);
2778 inc_blk_idx(v->left_blk_idx);
2779 inc_blk_idx(v->cur_blk_idx);
2781 if (!v->s.loop_filter)
2782 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2784 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2785 s->first_slice_line = 0;
2788 if (v->s.loop_filter)
2789 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2790 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2791 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2795 static void vc1_decode_p_blocks(VC1Context *v)
2797 MpegEncContext *s = &v->s;
2798 int apply_loop_filter;
2800 /* select coding mode used for VLC tables selection */
2801 switch (v->c_ac_table_index) {
2803 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2806 v->codingset = CS_HIGH_MOT_INTRA;
2809 v->codingset = CS_MID_RATE_INTRA;
2813 switch (v->c_ac_table_index) {
2815 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2818 v->codingset2 = CS_HIGH_MOT_INTER;
2821 v->codingset2 = CS_MID_RATE_INTER;
2825 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2826 s->first_slice_line = 1;
2827 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2828 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2830 init_block_index(v);
2831 for (; s->mb_x < s->mb_width; s->mb_x++) {
2832 ff_update_block_index(s);
2834 if (v->fcm == ILACE_FIELD || (v->fcm == PROGRESSIVE && v->mv_type_is_raw) || v->skip_is_raw)
2835 if (get_bits_left(&v->s.gb) <= 1) {
2836 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2840 if (v->fcm == ILACE_FIELD) {
2841 vc1_decode_p_mb_intfi(v);
2842 if (apply_loop_filter)
2843 ff_vc1_p_loop_filter(v);
2844 } else if (v->fcm == ILACE_FRAME) {
2845 vc1_decode_p_mb_intfr(v);
2846 if (apply_loop_filter)
2847 ff_vc1_p_intfr_loop_filter(v);
2850 if (apply_loop_filter)
2851 ff_vc1_p_loop_filter(v);
2853 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2854 // TODO: may need modification to handle slice coding
2855 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2856 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2857 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2860 inc_blk_idx(v->topleft_blk_idx);
2861 inc_blk_idx(v->top_blk_idx);
2862 inc_blk_idx(v->left_blk_idx);
2863 inc_blk_idx(v->cur_blk_idx);
2865 memmove(v->cbp_base,
2866 v->cbp - s->mb_stride,
2867 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2868 memmove(v->ttblk_base,
2869 v->ttblk - s->mb_stride,
2870 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2871 memmove(v->is_intra_base,
2872 v->is_intra - s->mb_stride,
2873 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2874 memmove(v->luma_mv_base,
2875 v->luma_mv - s->mb_stride,
2876 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2877 if (s->mb_y != s->start_mb_y)
2878 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2879 s->first_slice_line = 0;
2881 if (s->end_mb_y >= s->start_mb_y)
2882 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2883 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2884 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2887 static void vc1_decode_b_blocks(VC1Context *v)
2889 MpegEncContext *s = &v->s;
2891 /* select coding mode used for VLC tables selection */
2892 switch (v->c_ac_table_index) {
2894 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2897 v->codingset = CS_HIGH_MOT_INTRA;
2900 v->codingset = CS_MID_RATE_INTRA;
2904 switch (v->c_ac_table_index) {
2906 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2909 v->codingset2 = CS_HIGH_MOT_INTER;
2912 v->codingset2 = CS_MID_RATE_INTER;
2916 s->first_slice_line = 1;
2917 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2919 init_block_index(v);
2920 for (; s->mb_x < s->mb_width; s->mb_x++) {
2921 ff_update_block_index(s);
2923 if (v->fcm == ILACE_FIELD || v->skip_is_raw || v->dmb_is_raw)
2924 if (get_bits_left(&v->s.gb) <= 1) {
2925 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2929 if (v->fcm == ILACE_FIELD) {
2930 vc1_decode_b_mb_intfi(v);
2931 if (v->s.loop_filter)
2932 ff_vc1_b_intfi_loop_filter(v);
2933 } else if (v->fcm == ILACE_FRAME) {
2934 vc1_decode_b_mb_intfr(v);
2935 if (v->s.loop_filter)
2936 ff_vc1_p_intfr_loop_filter(v);
2939 if (v->s.loop_filter)
2940 ff_vc1_i_loop_filter(v);
2942 if (get_bits_left(&s->gb) < 0 || get_bits_count(&s->gb) < 0) {
2943 // TODO: may need modification to handle slice coding
2944 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2945 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2946 get_bits_count(&s->gb), s->gb.size_in_bits, s->mb_x, s->mb_y);
2950 memmove(v->cbp_base,
2951 v->cbp - s->mb_stride,
2952 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2953 memmove(v->ttblk_base,
2954 v->ttblk - s->mb_stride,
2955 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2956 memmove(v->is_intra_base,
2957 v->is_intra - s->mb_stride,
2958 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2959 if (!v->s.loop_filter)
2960 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2962 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2963 s->first_slice_line = 0;
2965 if (v->s.loop_filter)
2966 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2967 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2968 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2971 static void vc1_decode_skip_blocks(VC1Context *v)
2973 MpegEncContext *s = &v->s;
2975 if (!v->s.last_picture.f->data[0])
2978 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2979 s->first_slice_line = 1;
2980 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2982 init_block_index(v);
2983 ff_update_block_index(s);
2984 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2985 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2986 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2987 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2988 s->first_slice_line = 0;
2990 s->pict_type = AV_PICTURE_TYPE_P;
2993 void ff_vc1_decode_blocks(VC1Context *v)
2996 v->s.esc3_level_length = 0;
2998 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
2999 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
3000 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
3001 v->s.loop_filter, v->s.low_delay);
3003 ff_er_add_slice(&v->s.er, 0, 0,
3004 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
3008 v->left_blk_idx = -1;
3009 v->topleft_blk_idx = 1;
3011 switch (v->s.pict_type) {
3012 case AV_PICTURE_TYPE_I:
3013 if (v->profile == PROFILE_ADVANCED)
3014 vc1_decode_i_blocks_adv(v);
3016 vc1_decode_i_blocks(v);
3018 case AV_PICTURE_TYPE_P:
3019 if (v->p_frame_skipped)
3020 vc1_decode_skip_blocks(v);
3022 vc1_decode_p_blocks(v);
3024 case AV_PICTURE_TYPE_B:
3026 if (v->profile == PROFILE_ADVANCED)
3027 vc1_decode_i_blocks_adv(v);
3029 vc1_decode_i_blocks(v);
3031 vc1_decode_b_blocks(v);