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);
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 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
600 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
601 if (dcdiff == 119 /* ESC index value */) {
602 dcdiff = get_bits(gb, 8 + m);
605 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
612 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
615 /* Store the quantized DC coeff, used for prediction */
617 scale = s->y_dc_scale;
619 scale = s->c_dc_scale;
620 block[0] = dcdiff * scale;
622 ac_val = s->ac_val[0][s->block_index[n]];
624 if (dc_pred_dir) // left
627 ac_val -= 16 * s->block_wrap[n];
629 scale = v->pq * 2 + v->halfpq;
635 int last = 0, skip, value;
636 const uint8_t *zz_table;
641 zz_table = v->zz_8x8[2];
643 zz_table = v->zz_8x8[3];
645 zz_table = v->zz_8x8[1];
648 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
654 block[zz_table[i++]] = value;
657 /* apply AC prediction if needed */
660 if (dc_pred_dir) { // left
666 for (k = 1; k < 8; k++)
667 block[k << sh] += ac_val[k];
669 /* save AC coeffs for further prediction */
670 for (k = 1; k < 8; k++) {
671 ac_val2[k] = block[k << v->left_blk_sh];
672 ac_val2[k + 8] = block[k << v->top_blk_sh];
675 /* scale AC coeffs */
676 for (k = 1; k < 64; k++)
680 block[k] += (block[k] < 0) ? -v->pq : v->pq;
686 memset(ac_val2, 0, 16 * 2);
688 /* apply AC prediction if needed */
691 if (dc_pred_dir) { //left
698 memcpy(ac_val2, ac_val, 8 * 2);
699 for (k = 1; k < 8; k++) {
700 block[k << sh] = ac_val[k] * scale;
701 if (!v->pquantizer && block[k << sh])
702 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
706 if (s->ac_pred) i = 63;
707 s->block_last_index[n] = i;
712 /** Decode intra block in intra frames - should be faster than decode_intra_block
713 * @param v VC1Context
714 * @param block block to decode
715 * @param[in] n subblock number
716 * @param coded are AC coeffs present or not
717 * @param codingset set of VLC to decode data
718 * @param mquant quantizer value for this macroblock
720 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
721 int coded, int codingset, int mquant)
723 GetBitContext *gb = &v->s.gb;
724 MpegEncContext *s = &v->s;
725 int dc_pred_dir = 0; /* Direction of the DC prediction used */
727 int16_t *dc_val = NULL;
728 int16_t *ac_val, *ac_val2;
730 int a_avail = v->a_avail, c_avail = v->c_avail;
731 int use_pred = s->ac_pred;
734 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
735 int quant = FFABS(mquant);
737 /* Get DC differential */
739 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
741 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
744 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
748 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
749 if (dcdiff == 119 /* ESC index value */) {
750 dcdiff = get_bits(gb, 8 + m);
753 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
760 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
763 /* Store the quantized DC coeff, used for prediction */
765 scale = s->y_dc_scale;
767 scale = s->c_dc_scale;
768 block[0] = dcdiff * scale;
770 /* check if AC is needed at all */
771 if (!a_avail && !c_avail)
774 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
776 ac_val = s->ac_val[0][s->block_index[n]];
778 if (dc_pred_dir) // left
781 ac_val -= 16 * s->block_wrap[n];
783 q1 = s->current_picture.qscale_table[mb_pos];
786 else if (dc_pred_dir) {
789 else if (c_avail && mb_pos)
790 q2 = s->current_picture.qscale_table[mb_pos - 1];
794 else if (a_avail && mb_pos >= s->mb_stride)
795 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
802 int last = 0, skip, value;
803 const uint8_t *zz_table;
807 if (!use_pred && v->fcm == ILACE_FRAME) {
808 zz_table = v->zzi_8x8;
810 if (!dc_pred_dir) // top
811 zz_table = v->zz_8x8[2];
813 zz_table = v->zz_8x8[3];
816 if (v->fcm != ILACE_FRAME)
817 zz_table = v->zz_8x8[1];
819 zz_table = v->zzi_8x8;
823 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
829 block[zz_table[i++]] = value;
832 /* apply AC prediction if needed */
835 if (dc_pred_dir) { // left
841 /* scale predictors if needed*/
842 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
844 return AVERROR_INVALIDDATA;
846 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
847 if (q2 && q1 != q2) {
848 for (k = 1; k < 8; k++)
849 block[k << sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
851 for (k = 1; k < 8; k++)
852 block[k << sh] += ac_val[k];
855 /* save AC coeffs for further prediction */
856 for (k = 1; k < 8; k++) {
857 ac_val2[k ] = block[k << v->left_blk_sh];
858 ac_val2[k + 8] = block[k << v->top_blk_sh];
861 /* scale AC coeffs */
862 for (k = 1; k < 64; k++)
866 block[k] += (block[k] < 0) ? -quant : quant;
869 } else { // no AC coeffs
872 memset(ac_val2, 0, 16 * 2);
874 /* apply AC prediction if needed */
877 if (dc_pred_dir) { // left
884 memcpy(ac_val2, ac_val, 8 * 2);
885 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
887 return AVERROR_INVALIDDATA;
889 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
890 if (q2 && q1 != q2) {
891 for (k = 1; k < 8; k++)
892 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
894 for (k = 1; k < 8; k++) {
895 block[k << sh] = ac_val2[k] * scale;
896 if (!v->pquantizer && block[k << sh])
897 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
901 if (use_pred) i = 63;
902 s->block_last_index[n] = i;
907 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
908 * @param v VC1Context
909 * @param block block to decode
910 * @param[in] n subblock index
911 * @param coded are AC coeffs present or not
912 * @param mquant block quantizer
913 * @param codingset set of VLC to decode data
915 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
916 int coded, int mquant, int codingset)
918 GetBitContext *gb = &v->s.gb;
919 MpegEncContext *s = &v->s;
920 int dc_pred_dir = 0; /* Direction of the DC prediction used */
922 int16_t *dc_val = NULL;
923 int16_t *ac_val, *ac_val2;
925 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
926 int a_avail = v->a_avail, c_avail = v->c_avail;
927 int use_pred = s->ac_pred;
930 int quant = FFABS(mquant);
932 s->bdsp.clear_block(block);
934 /* XXX: Guard against dumb values of mquant */
935 quant = av_clip_uintp2(quant, 5);
937 /* Set DC scale - y and c use the same */
938 s->y_dc_scale = s->y_dc_scale_table[quant];
939 s->c_dc_scale = s->c_dc_scale_table[quant];
941 /* Get DC differential */
943 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
945 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
948 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
952 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
953 if (dcdiff == 119 /* ESC index value */) {
954 dcdiff = get_bits(gb, 8 + m);
957 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
964 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
967 /* Store the quantized DC coeff, used for prediction */
970 block[0] = dcdiff * s->y_dc_scale;
972 block[0] = dcdiff * s->c_dc_scale;
978 /* check if AC is needed at all and adjust direction if needed */
979 if (!a_avail) dc_pred_dir = 1;
980 if (!c_avail) dc_pred_dir = 0;
981 if (!a_avail && !c_avail) use_pred = 0;
982 ac_val = s->ac_val[0][s->block_index[n]];
985 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
987 if (dc_pred_dir) //left
990 ac_val -= 16 * s->block_wrap[n];
992 q1 = s->current_picture.qscale_table[mb_pos];
993 if (dc_pred_dir && c_avail && mb_pos)
994 q2 = s->current_picture.qscale_table[mb_pos - 1];
995 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
996 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
997 if (dc_pred_dir && n == 1)
999 if (!dc_pred_dir && n == 2)
1001 if (n == 3) q2 = q1;
1004 int last = 0, skip, value;
1008 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
1014 if (v->fcm == PROGRESSIVE)
1015 block[v->zz_8x8[0][i++]] = value;
1017 if (use_pred && (v->fcm == ILACE_FRAME)) {
1018 if (!dc_pred_dir) // top
1019 block[v->zz_8x8[2][i++]] = value;
1021 block[v->zz_8x8[3][i++]] = value;
1023 block[v->zzi_8x8[i++]] = value;
1028 /* apply AC prediction if needed */
1030 /* scale predictors if needed*/
1031 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1033 return AVERROR_INVALIDDATA;
1035 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1036 if (q2 && q1 != q2) {
1037 if (dc_pred_dir) { // left
1038 for (k = 1; k < 8; k++)
1039 block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1041 for (k = 1; k < 8; k++)
1042 block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1045 if (dc_pred_dir) { // left
1046 for (k = 1; k < 8; k++)
1047 block[k << v->left_blk_sh] += ac_val[k];
1049 for (k = 1; k < 8; k++)
1050 block[k << v->top_blk_sh] += ac_val[k + 8];
1054 /* save AC coeffs for further prediction */
1055 for (k = 1; k < 8; k++) {
1056 ac_val2[k ] = block[k << v->left_blk_sh];
1057 ac_val2[k + 8] = block[k << v->top_blk_sh];
1060 /* scale AC coeffs */
1061 for (k = 1; k < 64; k++)
1065 block[k] += (block[k] < 0) ? -quant : quant;
1068 if (use_pred) i = 63;
1069 } else { // no AC coeffs
1072 memset(ac_val2, 0, 16 * 2);
1073 if (dc_pred_dir) { // left
1075 memcpy(ac_val2, ac_val, 8 * 2);
1076 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1078 return AVERROR_INVALIDDATA;
1080 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1081 if (q2 && q1 != q2) {
1082 for (k = 1; k < 8; k++)
1083 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1088 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1089 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1091 return AVERROR_INVALIDDATA;
1093 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1094 if (q2 && q1 != q2) {
1095 for (k = 1; k < 8; k++)
1096 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1101 /* apply AC prediction if needed */
1103 if (dc_pred_dir) { // left
1104 for (k = 1; k < 8; k++) {
1105 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1106 if (!v->pquantizer && block[k << v->left_blk_sh])
1107 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1110 for (k = 1; k < 8; k++) {
1111 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1112 if (!v->pquantizer && block[k << v->top_blk_sh])
1113 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1119 s->block_last_index[n] = i;
1126 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1127 int mquant, int ttmb, int first_block,
1128 uint8_t *dst, int linesize, int skip_block,
1131 MpegEncContext *s = &v->s;
1132 GetBitContext *gb = &s->gb;
1135 int scale, off, idx, last, skip, value;
1136 int ttblk = ttmb & 7;
1138 int quant = FFABS(mquant);
1140 s->bdsp.clear_block(block);
1143 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
1145 if (ttblk == TT_4X4) {
1146 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1148 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1149 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1150 || (!v->res_rtm_flag && !first_block))) {
1151 subblkpat = decode012(gb);
1153 subblkpat ^= 3; // swap decoded pattern bits
1154 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1156 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1159 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1161 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1162 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1163 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1166 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1167 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1176 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1183 idx = v->zz_8x8[0][i++];
1185 idx = v->zzi_8x8[i++];
1186 block[idx] = value * scale;
1188 block[idx] += (block[idx] < 0) ? -quant : quant;
1192 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1194 v->vc1dsp.vc1_inv_trans_8x8(block);
1195 s->idsp.add_pixels_clamped(block, dst, linesize);
1200 pat = ~subblkpat & 0xF;
1201 for (j = 0; j < 4; j++) {
1202 last = subblkpat & (1 << (3 - j));
1204 off = (j & 1) * 4 + (j & 2) * 16;
1206 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1213 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1215 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1216 block[idx + off] = value * scale;
1218 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1220 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1222 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1224 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1229 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1230 for (j = 0; j < 2; j++) {
1231 last = subblkpat & (1 << (1 - j));
1235 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1242 idx = v->zz_8x4[i++] + off;
1244 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1245 block[idx] = value * scale;
1247 block[idx] += (block[idx] < 0) ? -quant : quant;
1249 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1251 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1253 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1258 pat = ~(subblkpat * 5) & 0xF;
1259 for (j = 0; j < 2; j++) {
1260 last = subblkpat & (1 << (1 - j));
1264 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1271 idx = v->zz_4x8[i++] + off;
1273 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1274 block[idx] = value * scale;
1276 block[idx] += (block[idx] < 0) ? -quant : quant;
1278 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1280 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1282 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1288 *ttmb_out |= ttblk << (n * 4);
1292 /** @} */ // Macroblock group
1294 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1296 /** Decode one P-frame MB
1298 static int vc1_decode_p_mb(VC1Context *v)
1300 MpegEncContext *s = &v->s;
1301 GetBitContext *gb = &s->gb;
1303 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1304 int cbp; /* cbp decoding stuff */
1305 int mqdiff, mquant; /* MB quantization */
1306 int ttmb = v->ttfrm; /* MB Transform type */
1308 int mb_has_coeffs = 1; /* last_flag */
1309 int dmv_x, dmv_y; /* Differential MV components */
1310 int index, index1; /* LUT indexes */
1311 int val, sign; /* temp values */
1312 int first_block = 1;
1314 int skipped, fourmv;
1315 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1317 mquant = v->pq; /* lossy initialization */
1319 if (v->mv_type_is_raw)
1320 fourmv = get_bits1(gb);
1322 fourmv = v->mv_type_mb_plane[mb_pos];
1324 skipped = get_bits1(gb);
1326 skipped = v->s.mbskip_table[mb_pos];
1328 if (!fourmv) { /* 1MV mode */
1330 GET_MVDATA(dmv_x, dmv_y);
1333 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1334 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1336 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1337 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1339 /* FIXME Set DC val for inter block ? */
1340 if (s->mb_intra && !mb_has_coeffs) {
1342 s->ac_pred = get_bits1(gb);
1344 } else if (mb_has_coeffs) {
1346 s->ac_pred = get_bits1(gb);
1347 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1353 s->current_picture.qscale_table[mb_pos] = mquant;
1355 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1356 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1357 VC1_TTMB_VLC_BITS, 2);
1358 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1360 for (i = 0; i < 6; i++) {
1361 s->dc_val[0][s->block_index[i]] = 0;
1363 val = ((cbp >> (5 - i)) & 1);
1364 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1365 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1367 /* check if prediction blocks A and C are available */
1368 v->a_avail = v->c_avail = 0;
1369 if (i == 2 || i == 3 || !s->first_slice_line)
1370 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1371 if (i == 1 || i == 3 || s->mb_x)
1372 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1374 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1375 (i & 4) ? v->codingset2 : v->codingset);
1376 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1378 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1380 for (j = 0; j < 64; j++)
1381 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1382 block_cbp |= 0xF << (i << 2);
1383 block_intra |= 1 << i;
1385 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1386 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1387 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1388 block_cbp |= pat << (i << 2);
1389 if (!v->ttmbf && ttmb < 8)
1396 for (i = 0; i < 6; i++) {
1397 v->mb_type[0][s->block_index[i]] = 0;
1398 s->dc_val[0][s->block_index[i]] = 0;
1400 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1401 s->current_picture.qscale_table[mb_pos] = 0;
1402 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1403 ff_vc1_mc_1mv(v, 0);
1405 } else { // 4MV mode
1406 if (!skipped /* unskipped MB */) {
1407 int intra_count = 0, coded_inter = 0;
1408 int is_intra[6], is_coded[6];
1410 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1411 for (i = 0; i < 6; i++) {
1412 val = ((cbp >> (5 - i)) & 1);
1413 s->dc_val[0][s->block_index[i]] = 0;
1420 GET_MVDATA(dmv_x, dmv_y);
1422 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1424 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1425 intra_count += s->mb_intra;
1426 is_intra[i] = s->mb_intra;
1427 is_coded[i] = mb_has_coeffs;
1430 is_intra[i] = (intra_count >= 3);
1434 ff_vc1_mc_4mv_chroma(v, 0);
1435 v->mb_type[0][s->block_index[i]] = is_intra[i];
1437 coded_inter = !is_intra[i] & is_coded[i];
1439 // if there are no coded blocks then don't do anything more
1441 if (!intra_count && !coded_inter)
1444 s->current_picture.qscale_table[mb_pos] = mquant;
1445 /* test if block is intra and has pred */
1448 for (i = 0; i < 6; i++)
1450 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1451 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1457 s->ac_pred = get_bits1(gb);
1461 if (!v->ttmbf && coded_inter)
1462 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1463 for (i = 0; i < 6; i++) {
1465 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1466 s->mb_intra = is_intra[i];
1468 /* check if prediction blocks A and C are available */
1469 v->a_avail = v->c_avail = 0;
1470 if (i == 2 || i == 3 || !s->first_slice_line)
1471 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1472 if (i == 1 || i == 3 || s->mb_x)
1473 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1475 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1476 (i & 4) ? v->codingset2 : v->codingset);
1477 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1479 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1481 for (j = 0; j < 64; j++)
1482 v->block[v->cur_blk_idx][block_map[i]][j] <<= 1;
1483 block_cbp |= 0xF << (i << 2);
1484 block_intra |= 1 << i;
1485 } else if (is_coded[i]) {
1486 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1487 first_block, s->dest[dst_idx] + off,
1488 (i & 4) ? s->uvlinesize : s->linesize,
1489 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1491 block_cbp |= pat << (i << 2);
1492 if (!v->ttmbf && ttmb < 8)
1497 } else { // skipped MB
1499 s->current_picture.qscale_table[mb_pos] = 0;
1500 for (i = 0; i < 6; i++) {
1501 v->mb_type[0][s->block_index[i]] = 0;
1502 s->dc_val[0][s->block_index[i]] = 0;
1504 for (i = 0; i < 4; i++) {
1505 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1506 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1508 ff_vc1_mc_4mv_chroma(v, 0);
1509 s->current_picture.qscale_table[mb_pos] = 0;
1513 if (v->overlap && v->pq >= 9)
1514 ff_vc1_p_overlap_filter(v);
1515 vc1_put_blocks_clamped(v, 1);
1517 v->cbp[s->mb_x] = block_cbp;
1518 v->ttblk[s->mb_x] = block_tt;
1519 v->is_intra[s->mb_x] = block_intra;
1524 /* Decode one macroblock in an interlaced frame p picture */
1526 static int vc1_decode_p_mb_intfr(VC1Context *v)
1528 MpegEncContext *s = &v->s;
1529 GetBitContext *gb = &s->gb;
1531 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1532 int cbp = 0; /* cbp decoding stuff */
1533 int mqdiff, mquant; /* MB quantization */
1534 int ttmb = v->ttfrm; /* MB Transform type */
1536 int mb_has_coeffs = 1; /* last_flag */
1537 int dmv_x, dmv_y; /* Differential MV components */
1538 int val; /* temp value */
1539 int first_block = 1;
1541 int skipped, fourmv = 0, twomv = 0;
1542 int block_cbp = 0, pat, block_tt = 0;
1543 int idx_mbmode = 0, mvbp;
1546 mquant = v->pq; /* Lossy initialization */
1549 skipped = get_bits1(gb);
1551 skipped = v->s.mbskip_table[mb_pos];
1553 if (v->fourmvswitch)
1554 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1556 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1557 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1558 /* store the motion vector type in a flag (useful later) */
1559 case MV_PMODE_INTFR_4MV:
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;
1566 case MV_PMODE_INTFR_4MV_FIELD:
1568 v->blk_mv_type[s->block_index[0]] = 1;
1569 v->blk_mv_type[s->block_index[1]] = 1;
1570 v->blk_mv_type[s->block_index[2]] = 1;
1571 v->blk_mv_type[s->block_index[3]] = 1;
1573 case MV_PMODE_INTFR_2MV_FIELD:
1575 v->blk_mv_type[s->block_index[0]] = 1;
1576 v->blk_mv_type[s->block_index[1]] = 1;
1577 v->blk_mv_type[s->block_index[2]] = 1;
1578 v->blk_mv_type[s->block_index[3]] = 1;
1580 case MV_PMODE_INTFR_1MV:
1581 v->blk_mv_type[s->block_index[0]] = 0;
1582 v->blk_mv_type[s->block_index[1]] = 0;
1583 v->blk_mv_type[s->block_index[2]] = 0;
1584 v->blk_mv_type[s->block_index[3]] = 0;
1587 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1588 for (i = 0; i < 4; i++) {
1589 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1590 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1592 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1594 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1595 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1596 mb_has_coeffs = get_bits1(gb);
1598 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1599 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1601 s->current_picture.qscale_table[mb_pos] = mquant;
1602 /* Set DC scale - y and c use the same (not sure if necessary here) */
1603 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1604 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1606 for (i = 0; i < 6; i++) {
1607 v->a_avail = v->c_avail = 0;
1608 v->mb_type[0][s->block_index[i]] = 1;
1609 s->dc_val[0][s->block_index[i]] = 0;
1611 val = ((cbp >> (5 - i)) & 1);
1612 if (i == 2 || i == 3 || !s->first_slice_line)
1613 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1614 if (i == 1 || i == 3 || s->mb_x)
1615 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1617 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1618 (i & 4) ? v->codingset2 : v->codingset);
1619 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1621 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1623 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1626 block_cbp |= 0xf << (i << 2);
1629 } else { // inter MB
1630 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1632 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1633 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1634 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1636 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1637 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1638 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1641 s->mb_intra = v->is_intra[s->mb_x] = 0;
1642 for (i = 0; i < 6; i++)
1643 v->mb_type[0][s->block_index[i]] = 0;
1644 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1645 /* for all motion vector read MVDATA and motion compensate each block */
1649 for (i = 0; i < 4; i++) {
1651 if (mvbp & (8 >> i))
1652 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1653 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1654 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1656 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1661 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1663 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1664 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1665 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1668 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1670 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1671 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1672 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1673 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1675 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1678 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1680 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1681 ff_vc1_mc_1mv(v, 0);
1684 GET_MQUANT(); // p. 227
1685 s->current_picture.qscale_table[mb_pos] = mquant;
1686 if (!v->ttmbf && cbp)
1687 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1688 for (i = 0; i < 6; i++) {
1689 s->dc_val[0][s->block_index[i]] = 0;
1691 val = ((cbp >> (5 - i)) & 1);
1693 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1695 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1697 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1698 first_block, s->dest[dst_idx] + off,
1699 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1700 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1701 block_cbp |= pat << (i << 2);
1702 if (!v->ttmbf && ttmb < 8)
1709 s->mb_intra = v->is_intra[s->mb_x] = 0;
1710 for (i = 0; i < 6; i++) {
1711 v->mb_type[0][s->block_index[i]] = 0;
1712 s->dc_val[0][s->block_index[i]] = 0;
1714 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1715 s->current_picture.qscale_table[mb_pos] = 0;
1716 v->blk_mv_type[s->block_index[0]] = 0;
1717 v->blk_mv_type[s->block_index[1]] = 0;
1718 v->blk_mv_type[s->block_index[2]] = 0;
1719 v->blk_mv_type[s->block_index[3]] = 0;
1720 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1721 ff_vc1_mc_1mv(v, 0);
1722 v->fieldtx_plane[mb_pos] = 0;
1724 if (v->overlap && v->pq >= 9)
1725 ff_vc1_p_overlap_filter(v);
1726 vc1_put_blocks_clamped(v, 1);
1728 v->cbp[s->mb_x] = block_cbp;
1729 v->ttblk[s->mb_x] = block_tt;
1734 static int vc1_decode_p_mb_intfi(VC1Context *v)
1736 MpegEncContext *s = &v->s;
1737 GetBitContext *gb = &s->gb;
1739 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1740 int cbp = 0; /* cbp decoding stuff */
1741 int mqdiff, mquant; /* MB quantization */
1742 int ttmb = v->ttfrm; /* MB Transform type */
1744 int mb_has_coeffs = 1; /* last_flag */
1745 int dmv_x, dmv_y; /* Differential MV components */
1746 int val; /* temp values */
1747 int first_block = 1;
1750 int block_cbp = 0, pat, block_tt = 0;
1753 mquant = v->pq; /* Lossy initialization */
1755 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1756 if (idx_mbmode <= 1) { // intra MB
1757 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1759 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1760 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1761 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1763 s->current_picture.qscale_table[mb_pos] = mquant;
1764 /* Set DC scale - y and c use the same (not sure if necessary here) */
1765 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1766 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1767 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1768 mb_has_coeffs = idx_mbmode & 1;
1770 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1772 for (i = 0; i < 6; i++) {
1773 v->a_avail = v->c_avail = 0;
1774 v->mb_type[0][s->block_index[i]] = 1;
1775 s->dc_val[0][s->block_index[i]] = 0;
1777 val = ((cbp >> (5 - i)) & 1);
1778 if (i == 2 || i == 3 || !s->first_slice_line)
1779 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1780 if (i == 1 || i == 3 || s->mb_x)
1781 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1783 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1784 (i & 4) ? v->codingset2 : v->codingset);
1785 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1787 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1788 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1789 block_cbp |= 0xf << (i << 2);
1792 s->mb_intra = v->is_intra[s->mb_x] = 0;
1793 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1794 for (i = 0; i < 6; i++)
1795 v->mb_type[0][s->block_index[i]] = 0;
1796 if (idx_mbmode <= 5) { // 1-MV
1797 dmv_x = dmv_y = pred_flag = 0;
1798 if (idx_mbmode & 1) {
1799 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1801 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1802 ff_vc1_mc_1mv(v, 0);
1803 mb_has_coeffs = !(idx_mbmode & 2);
1805 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1806 for (i = 0; i < 4; i++) {
1807 dmv_x = dmv_y = pred_flag = 0;
1808 if (v->fourmvbp & (8 >> i))
1809 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1810 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1811 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1813 ff_vc1_mc_4mv_chroma(v, 0);
1814 mb_has_coeffs = idx_mbmode & 1;
1817 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1821 s->current_picture.qscale_table[mb_pos] = mquant;
1822 if (!v->ttmbf && cbp) {
1823 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1826 for (i = 0; i < 6; i++) {
1827 s->dc_val[0][s->block_index[i]] = 0;
1829 val = ((cbp >> (5 - i)) & 1);
1830 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1832 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1833 first_block, s->dest[dst_idx] + off,
1834 (i & 4) ? s->uvlinesize : s->linesize,
1835 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1837 block_cbp |= pat << (i << 2);
1838 if (!v->ttmbf && ttmb < 8)
1844 if (v->overlap && v->pq >= 9)
1845 ff_vc1_p_overlap_filter(v);
1846 vc1_put_blocks_clamped(v, 1);
1848 v->cbp[s->mb_x] = block_cbp;
1849 v->ttblk[s->mb_x] = block_tt;
1854 /** Decode one B-frame MB (in Main profile)
1856 static void vc1_decode_b_mb(VC1Context *v)
1858 MpegEncContext *s = &v->s;
1859 GetBitContext *gb = &s->gb;
1861 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1862 int cbp = 0; /* cbp decoding stuff */
1863 int mqdiff, mquant; /* MB quantization */
1864 int ttmb = v->ttfrm; /* MB Transform type */
1865 int mb_has_coeffs = 0; /* last_flag */
1866 int index, index1; /* LUT indexes */
1867 int val, sign; /* temp values */
1868 int first_block = 1;
1870 int skipped, direct;
1871 int dmv_x[2], dmv_y[2];
1872 int bmvtype = BMV_TYPE_BACKWARD;
1874 mquant = v->pq; /* lossy initialization */
1878 direct = get_bits1(gb);
1880 direct = v->direct_mb_plane[mb_pos];
1882 skipped = get_bits1(gb);
1884 skipped = v->s.mbskip_table[mb_pos];
1886 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1887 for (i = 0; i < 6; i++) {
1888 v->mb_type[0][s->block_index[i]] = 0;
1889 s->dc_val[0][s->block_index[i]] = 0;
1891 s->current_picture.qscale_table[mb_pos] = 0;
1895 GET_MVDATA(dmv_x[0], dmv_y[0]);
1896 dmv_x[1] = dmv_x[0];
1897 dmv_y[1] = dmv_y[0];
1899 if (skipped || !s->mb_intra) {
1900 bmvtype = decode012(gb);
1903 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1906 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1909 bmvtype = BMV_TYPE_INTERPOLATED;
1910 dmv_x[0] = dmv_y[0] = 0;
1914 for (i = 0; i < 6; i++)
1915 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1919 bmvtype = BMV_TYPE_INTERPOLATED;
1920 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1921 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1925 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1928 s->current_picture.qscale_table[mb_pos] = mquant;
1930 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1931 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1932 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1933 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1935 if (!mb_has_coeffs && !s->mb_intra) {
1936 /* no coded blocks - effectively skipped */
1937 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1938 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1941 if (s->mb_intra && !mb_has_coeffs) {
1943 s->current_picture.qscale_table[mb_pos] = mquant;
1944 s->ac_pred = get_bits1(gb);
1946 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1948 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1949 GET_MVDATA(dmv_x[0], dmv_y[0]);
1950 if (!mb_has_coeffs) {
1951 /* interpolated skipped block */
1952 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1953 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1957 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1959 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1962 s->ac_pred = get_bits1(gb);
1963 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1965 s->current_picture.qscale_table[mb_pos] = mquant;
1966 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1967 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1971 for (i = 0; i < 6; i++) {
1972 s->dc_val[0][s->block_index[i]] = 0;
1974 val = ((cbp >> (5 - i)) & 1);
1975 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1976 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1978 /* check if prediction blocks A and C are available */
1979 v->a_avail = v->c_avail = 0;
1980 if (i == 2 || i == 3 || !s->first_slice_line)
1981 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1982 if (i == 1 || i == 3 || s->mb_x)
1983 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1985 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1986 (i & 4) ? v->codingset2 : v->codingset);
1987 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1989 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1991 for (j = 0; j < 64; j++)
1992 s->block[i][j] <<= 1;
1993 s->idsp.put_signed_pixels_clamped(s->block[i],
1994 s->dest[dst_idx] + off,
1995 i & 4 ? s->uvlinesize
1998 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1999 first_block, s->dest[dst_idx] + off,
2000 (i & 4) ? s->uvlinesize : s->linesize,
2001 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
2002 if (!v->ttmbf && ttmb < 8)
2009 /** Decode one B-frame MB (in interlaced field B picture)
2011 static void vc1_decode_b_mb_intfi(VC1Context *v)
2013 MpegEncContext *s = &v->s;
2014 GetBitContext *gb = &s->gb;
2016 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2017 int cbp = 0; /* cbp decoding stuff */
2018 int mqdiff, mquant; /* MB quantization */
2019 int ttmb = v->ttfrm; /* MB Transform type */
2020 int mb_has_coeffs = 0; /* last_flag */
2021 int val; /* temp value */
2022 int first_block = 1;
2025 int dmv_x[2], dmv_y[2], pred_flag[2];
2026 int bmvtype = BMV_TYPE_BACKWARD;
2027 int block_cbp = 0, pat, block_tt = 0;
2030 mquant = v->pq; /* Lossy initialization */
2033 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
2034 if (idx_mbmode <= 1) { // intra MB
2035 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2037 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2038 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2039 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2041 s->current_picture.qscale_table[mb_pos] = mquant;
2042 /* Set DC scale - y and c use the same (not sure if necessary here) */
2043 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2044 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2045 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2046 mb_has_coeffs = idx_mbmode & 1;
2048 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2050 for (i = 0; i < 6; i++) {
2051 v->a_avail = v->c_avail = 0;
2052 v->mb_type[0][s->block_index[i]] = 1;
2053 s->dc_val[0][s->block_index[i]] = 0;
2055 val = ((cbp >> (5 - i)) & 1);
2056 if (i == 2 || i == 3 || !s->first_slice_line)
2057 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2058 if (i == 1 || i == 3 || s->mb_x)
2059 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2061 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2062 (i & 4) ? v->codingset2 : v->codingset);
2063 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2065 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2067 for (j = 0; j < 64; j++)
2068 s->block[i][j] <<= 1;
2069 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2070 s->idsp.put_signed_pixels_clamped(s->block[i],
2071 s->dest[dst_idx] + off,
2072 (i & 4) ? s->uvlinesize
2076 s->mb_intra = v->is_intra[s->mb_x] = 0;
2077 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2078 for (i = 0; i < 6; i++)
2079 v->mb_type[0][s->block_index[i]] = 0;
2081 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2083 fwd = v->forward_mb_plane[mb_pos];
2084 if (idx_mbmode <= 5) { // 1-MV
2086 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2087 pred_flag[0] = pred_flag[1] = 0;
2089 bmvtype = BMV_TYPE_FORWARD;
2091 bmvtype = decode012(gb);
2094 bmvtype = BMV_TYPE_BACKWARD;
2097 bmvtype = BMV_TYPE_DIRECT;
2100 bmvtype = BMV_TYPE_INTERPOLATED;
2101 interpmvp = get_bits1(gb);
2104 v->bmvtype = bmvtype;
2105 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2106 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2109 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2111 if (bmvtype == BMV_TYPE_DIRECT) {
2112 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2113 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2114 if (!s->next_picture_ptr->field_picture) {
2115 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2119 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2120 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2121 mb_has_coeffs = !(idx_mbmode & 2);
2124 bmvtype = BMV_TYPE_FORWARD;
2125 v->bmvtype = bmvtype;
2126 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2127 for (i = 0; i < 4; i++) {
2128 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2129 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2130 if (v->fourmvbp & (8 >> i)) {
2131 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2132 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2133 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2135 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2136 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2138 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2139 mb_has_coeffs = idx_mbmode & 1;
2142 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2146 s->current_picture.qscale_table[mb_pos] = mquant;
2147 if (!v->ttmbf && cbp) {
2148 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2151 for (i = 0; i < 6; i++) {
2152 s->dc_val[0][s->block_index[i]] = 0;
2154 val = ((cbp >> (5 - i)) & 1);
2155 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2157 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2158 first_block, s->dest[dst_idx] + off,
2159 (i & 4) ? s->uvlinesize : s->linesize,
2160 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2161 block_cbp |= pat << (i << 2);
2162 if (!v->ttmbf && ttmb < 8)
2168 v->cbp[s->mb_x] = block_cbp;
2169 v->ttblk[s->mb_x] = block_tt;
2172 /** Decode one B-frame MB (in interlaced frame B picture)
2174 static int vc1_decode_b_mb_intfr(VC1Context *v)
2176 MpegEncContext *s = &v->s;
2177 GetBitContext *gb = &s->gb;
2179 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2180 int cbp = 0; /* cbp decoding stuff */
2181 int mqdiff, mquant; /* MB quantization */
2182 int ttmb = v->ttfrm; /* MB Transform type */
2183 int mvsw = 0; /* motion vector switch */
2184 int mb_has_coeffs = 1; /* last_flag */
2185 int dmv_x, dmv_y; /* Differential MV components */
2186 int val; /* temp value */
2187 int first_block = 1;
2189 int skipped, direct, twomv = 0;
2190 int block_cbp = 0, pat, block_tt = 0;
2191 int idx_mbmode = 0, mvbp;
2192 int stride_y, fieldtx;
2193 int bmvtype = BMV_TYPE_BACKWARD;
2196 mquant = v->pq; /* Lossy initialization */
2199 skipped = get_bits1(gb);
2201 skipped = v->s.mbskip_table[mb_pos];
2204 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2205 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2207 v->blk_mv_type[s->block_index[0]] = 1;
2208 v->blk_mv_type[s->block_index[1]] = 1;
2209 v->blk_mv_type[s->block_index[2]] = 1;
2210 v->blk_mv_type[s->block_index[3]] = 1;
2212 v->blk_mv_type[s->block_index[0]] = 0;
2213 v->blk_mv_type[s->block_index[1]] = 0;
2214 v->blk_mv_type[s->block_index[2]] = 0;
2215 v->blk_mv_type[s->block_index[3]] = 0;
2219 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2220 for (i = 0; i < 4; i++) {
2221 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2222 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2223 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2224 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2226 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2228 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2229 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2230 mb_has_coeffs = get_bits1(gb);
2232 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2233 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2235 s->current_picture.qscale_table[mb_pos] = mquant;
2236 /* Set DC scale - y and c use the same (not sure if necessary here) */
2237 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2238 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2240 for (i = 0; i < 6; i++) {
2241 v->a_avail = v->c_avail = 0;
2242 v->mb_type[0][s->block_index[i]] = 1;
2243 s->dc_val[0][s->block_index[i]] = 0;
2245 val = ((cbp >> (5 - i)) & 1);
2246 if (i == 2 || i == 3 || !s->first_slice_line)
2247 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2248 if (i == 1 || i == 3 || s->mb_x)
2249 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2251 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2252 (i & 4) ? v->codingset2 : v->codingset);
2253 if (CONFIG_GRAY && i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2255 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2257 stride_y = s->linesize << fieldtx;
2258 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2260 stride_y = s->uvlinesize;
2263 s->idsp.put_signed_pixels_clamped(s->block[i],
2264 s->dest[dst_idx] + off,
2268 s->mb_intra = v->is_intra[s->mb_x] = 0;
2271 direct = get_bits1(gb);
2273 direct = v->direct_mb_plane[mb_pos];
2276 if (s->next_picture_ptr->field_picture)
2277 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2278 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);
2279 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);
2280 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);
2281 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);
2284 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);
2285 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);
2286 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);
2287 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);
2289 for (i = 1; i < 4; i += 2) {
2290 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2291 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2292 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2293 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2296 for (i = 1; i < 4; i++) {
2297 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2298 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2299 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2300 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2306 if (skipped || !s->mb_intra) {
2307 bmvtype = decode012(gb);
2310 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2313 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2316 bmvtype = BMV_TYPE_INTERPOLATED;
2320 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2321 mvsw = get_bits1(gb);
2324 if (!skipped) { // inter MB
2325 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2327 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2329 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2330 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2331 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2332 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2336 for (i = 0; i < 6; i++)
2337 v->mb_type[0][s->block_index[i]] = 0;
2338 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2339 /* for all motion vector read MVDATA and motion compensate each block */
2343 for (i = 0; i < 4; i++) {
2344 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2345 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2347 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2348 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2350 ff_vc1_mc_1mv(v, 0);
2351 ff_vc1_interp_mc(v);
2353 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2355 for (i = 0; i < 4; i++) {
2358 val = ((mvbp >> (3 - i)) & 1);
2360 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2362 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2363 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2364 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2367 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2368 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2369 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2373 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2375 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2376 ff_vc1_mc_1mv(v, 0);
2380 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2382 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2383 ff_vc1_interp_mc(v);
2385 dir = bmvtype == BMV_TYPE_BACKWARD;
2392 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2393 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2397 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2398 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2401 for (i = 0; i < 2; i++) {
2402 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];
2403 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];
2404 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];
2405 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];
2408 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2409 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2412 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2413 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2414 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2415 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2416 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2418 dir = bmvtype == BMV_TYPE_BACKWARD;
2420 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
2423 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2425 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2426 v->blk_mv_type[s->block_index[0]] = 1;
2427 v->blk_mv_type[s->block_index[1]] = 1;
2428 v->blk_mv_type[s->block_index[2]] = 1;
2429 v->blk_mv_type[s->block_index[3]] = 1;
2430 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2431 for (i = 0; i < 2; i++) {
2432 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];
2433 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];
2435 ff_vc1_mc_1mv(v, dir);
2439 GET_MQUANT(); // p. 227
2440 s->current_picture.qscale_table[mb_pos] = mquant;
2441 if (!v->ttmbf && cbp)
2442 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2443 for (i = 0; i < 6; i++) {
2444 s->dc_val[0][s->block_index[i]] = 0;
2446 val = ((cbp >> (5 - i)) & 1);
2448 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2450 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2452 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2453 first_block, s->dest[dst_idx] + off,
2454 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2455 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
2456 block_cbp |= pat << (i << 2);
2457 if (!v->ttmbf && ttmb < 8)
2465 for (i = 0; i < 6; i++) {
2466 v->mb_type[0][s->block_index[i]] = 0;
2467 s->dc_val[0][s->block_index[i]] = 0;
2469 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2470 s->current_picture.qscale_table[mb_pos] = 0;
2471 v->blk_mv_type[s->block_index[0]] = 0;
2472 v->blk_mv_type[s->block_index[1]] = 0;
2473 v->blk_mv_type[s->block_index[2]] = 0;
2474 v->blk_mv_type[s->block_index[3]] = 0;
2477 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2478 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2479 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2481 dir = bmvtype == BMV_TYPE_BACKWARD;
2482 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2487 for (i = 0; i < 2; i++) {
2488 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];
2489 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];
2490 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];
2491 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];
2494 v->blk_mv_type[s->block_index[0]] = 1;
2495 v->blk_mv_type[s->block_index[1]] = 1;
2496 v->blk_mv_type[s->block_index[2]] = 1;
2497 v->blk_mv_type[s->block_index[3]] = 1;
2498 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2499 for (i = 0; i < 2; i++) {
2500 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];
2501 s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
2507 ff_vc1_mc_1mv(v, dir);
2508 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2509 ff_vc1_interp_mc(v);
2511 v->fieldtx_plane[mb_pos] = 0;
2514 v->cbp[s->mb_x] = block_cbp;
2515 v->ttblk[s->mb_x] = block_tt;
2520 /** Decode blocks of I-frame
2522 static void vc1_decode_i_blocks(VC1Context *v)
2525 MpegEncContext *s = &v->s;
2530 /* select coding mode used for VLC tables selection */
2531 switch (v->y_ac_table_index) {
2533 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2536 v->codingset = CS_HIGH_MOT_INTRA;
2539 v->codingset = CS_MID_RATE_INTRA;
2543 switch (v->c_ac_table_index) {
2545 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2548 v->codingset2 = CS_HIGH_MOT_INTER;
2551 v->codingset2 = CS_MID_RATE_INTER;
2555 /* Set DC scale - y and c use the same */
2556 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2557 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2560 s->mb_x = s->mb_y = 0;
2562 s->first_slice_line = 1;
2563 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2565 init_block_index(v);
2566 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2567 ff_update_block_index(s);
2568 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2569 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2570 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2571 s->current_picture.qscale_table[mb_pos] = v->pq;
2572 for (int i = 0; i < 4; i++) {
2573 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2574 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2577 // do actual MB decoding and displaying
2578 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2579 v->s.ac_pred = get_bits1(&v->s.gb);
2581 for (k = 0; k < 6; k++) {
2582 v->mb_type[0][s->block_index[k]] = 1;
2584 val = ((cbp >> (5 - k)) & 1);
2587 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2591 cbp |= val << (5 - k);
2593 vc1_decode_i_block(v, v->block[v->cur_blk_idx][block_map[k]], k, val, (k < 4) ? v->codingset : v->codingset2);
2595 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2597 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2600 if (v->overlap && v->pq >= 9) {
2601 ff_vc1_i_overlap_filter(v);
2603 for (k = 0; k < 6; k++)
2604 for (j = 0; j < 64; j++)
2605 v->block[v->cur_blk_idx][block_map[k]][j] *= 2;
2606 vc1_put_blocks_clamped(v, 1);
2609 for (k = 0; k < 6; k++)
2610 for (j = 0; j < 64; j++)
2611 v->block[v->cur_blk_idx][block_map[k]][j] = (v->block[v->cur_blk_idx][block_map[k]][j] - 64) * 2;
2612 vc1_put_blocks_clamped(v, 0);
2615 if (v->s.loop_filter)
2616 ff_vc1_i_loop_filter(v);
2618 if (get_bits_count(&s->gb) > v->bits) {
2619 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2620 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2621 get_bits_count(&s->gb), v->bits);
2625 v->topleft_blk_idx = (v->topleft_blk_idx + 1) % (v->end_mb_x + 2);
2626 v->top_blk_idx = (v->top_blk_idx + 1) % (v->end_mb_x + 2);
2627 v->left_blk_idx = (v->left_blk_idx + 1) % (v->end_mb_x + 2);
2628 v->cur_blk_idx = (v->cur_blk_idx + 1) % (v->end_mb_x + 2);
2630 if (!v->s.loop_filter)
2631 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2633 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2635 s->first_slice_line = 0;
2637 if (v->s.loop_filter)
2638 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2640 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2641 * profile, these only differ are when decoding MSS2 rectangles. */
2642 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2645 /** Decode blocks of I-frame for advanced profile
2647 static void vc1_decode_i_blocks_adv(VC1Context *v)
2650 MpegEncContext *s = &v->s;
2656 GetBitContext *gb = &s->gb;
2658 /* select coding mode used for VLC tables selection */
2659 switch (v->y_ac_table_index) {
2661 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2664 v->codingset = CS_HIGH_MOT_INTRA;
2667 v->codingset = CS_MID_RATE_INTRA;
2671 switch (v->c_ac_table_index) {
2673 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2676 v->codingset2 = CS_HIGH_MOT_INTER;
2679 v->codingset2 = CS_MID_RATE_INTER;
2684 s->mb_x = s->mb_y = 0;
2686 s->first_slice_line = 1;
2687 s->mb_y = s->start_mb_y;
2688 if (s->start_mb_y) {
2690 init_block_index(v);
2691 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2692 (1 + s->b8_stride) * sizeof(*s->coded_block));
2694 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2696 init_block_index(v);
2697 for (;s->mb_x < s->mb_width; s->mb_x++) {
2699 ff_update_block_index(s);
2700 s->bdsp.clear_blocks(v->block[v->cur_blk_idx][0]);
2701 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2702 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2703 for (int i = 0; i < 4; i++) {
2704 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = 0;
2705 s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = 0;
2708 // do actual MB decoding and displaying
2709 if (v->fieldtx_is_raw)
2710 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2711 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2712 if (v->acpred_is_raw)
2713 v->s.ac_pred = get_bits1(&v->s.gb);
2715 v->s.ac_pred = v->acpred_plane[mb_pos];
2717 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2718 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2722 s->current_picture.qscale_table[mb_pos] = mquant;
2723 /* Set DC scale - y and c use the same */
2724 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
2725 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
2727 for (k = 0; k < 6; k++) {
2728 v->mb_type[0][s->block_index[k]] = 1;
2730 val = ((cbp >> (5 - k)) & 1);
2733 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2737 cbp |= val << (5 - k);
2739 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2740 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2742 vc1_decode_i_block_adv(v, v->block[v->cur_blk_idx][block_map[k]], k, val,
2743 (k < 4) ? v->codingset : v->codingset2, mquant);
2745 if (CONFIG_GRAY && k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2747 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[k]]);
2750 if (v->overlap && (v->pq >= 9 || v->condover != CONDOVER_NONE))
2751 ff_vc1_i_overlap_filter(v);
2752 vc1_put_blocks_clamped(v, 1);
2753 if (v->s.loop_filter)
2754 ff_vc1_i_loop_filter(v);
2756 if (get_bits_count(&s->gb) > v->bits) {
2757 // TODO: may need modification to handle slice coding
2758 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2759 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2760 get_bits_count(&s->gb), v->bits);
2763 inc_blk_idx(v->topleft_blk_idx);
2764 inc_blk_idx(v->top_blk_idx);
2765 inc_blk_idx(v->left_blk_idx);
2766 inc_blk_idx(v->cur_blk_idx);
2768 if (!v->s.loop_filter)
2769 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2771 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2772 s->first_slice_line = 0;
2775 if (v->s.loop_filter)
2776 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2777 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2778 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2781 static void vc1_decode_p_blocks(VC1Context *v)
2783 MpegEncContext *s = &v->s;
2784 int apply_loop_filter;
2786 /* select coding mode used for VLC tables selection */
2787 switch (v->c_ac_table_index) {
2789 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2792 v->codingset = CS_HIGH_MOT_INTRA;
2795 v->codingset = CS_MID_RATE_INTRA;
2799 switch (v->c_ac_table_index) {
2801 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2804 v->codingset2 = CS_HIGH_MOT_INTER;
2807 v->codingset2 = CS_MID_RATE_INTER;
2811 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);
2812 s->first_slice_line = 1;
2813 memset(v->cbp_base, 0, sizeof(v->cbp_base[0]) * 3 * s->mb_stride);
2814 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2816 init_block_index(v);
2817 for (; s->mb_x < s->mb_width; s->mb_x++) {
2818 ff_update_block_index(s);
2820 if (v->fcm == ILACE_FIELD) {
2821 vc1_decode_p_mb_intfi(v);
2822 if (apply_loop_filter)
2823 ff_vc1_p_loop_filter(v);
2824 } else if (v->fcm == ILACE_FRAME) {
2825 vc1_decode_p_mb_intfr(v);
2826 if (apply_loop_filter)
2827 ff_vc1_p_intfr_loop_filter(v);
2830 if (apply_loop_filter)
2831 ff_vc1_p_loop_filter(v);
2833 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2834 // TODO: may need modification to handle slice coding
2835 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2836 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2837 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2840 inc_blk_idx(v->topleft_blk_idx);
2841 inc_blk_idx(v->top_blk_idx);
2842 inc_blk_idx(v->left_blk_idx);
2843 inc_blk_idx(v->cur_blk_idx);
2845 memmove(v->cbp_base,
2846 v->cbp - s->mb_stride,
2847 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2848 memmove(v->ttblk_base,
2849 v->ttblk - s->mb_stride,
2850 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2851 memmove(v->is_intra_base,
2852 v->is_intra - s->mb_stride,
2853 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2854 memmove(v->luma_mv_base,
2855 v->luma_mv - s->mb_stride,
2856 sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
2857 if (s->mb_y != s->start_mb_y)
2858 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2859 s->first_slice_line = 0;
2861 if (s->end_mb_y >= s->start_mb_y)
2862 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2863 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2864 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2867 static void vc1_decode_b_blocks(VC1Context *v)
2869 MpegEncContext *s = &v->s;
2871 /* select coding mode used for VLC tables selection */
2872 switch (v->c_ac_table_index) {
2874 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2877 v->codingset = CS_HIGH_MOT_INTRA;
2880 v->codingset = CS_MID_RATE_INTRA;
2884 switch (v->c_ac_table_index) {
2886 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2889 v->codingset2 = CS_HIGH_MOT_INTER;
2892 v->codingset2 = CS_MID_RATE_INTER;
2896 s->first_slice_line = 1;
2897 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2899 init_block_index(v);
2900 for (; s->mb_x < s->mb_width; s->mb_x++) {
2901 ff_update_block_index(s);
2903 if (v->fcm == ILACE_FIELD) {
2904 vc1_decode_b_mb_intfi(v);
2905 if (v->s.loop_filter)
2906 ff_vc1_b_intfi_loop_filter(v);
2907 } else if (v->fcm == ILACE_FRAME) {
2908 vc1_decode_b_mb_intfr(v);
2909 if (v->s.loop_filter)
2910 ff_vc1_p_intfr_loop_filter(v);
2913 if (v->s.loop_filter)
2914 ff_vc1_i_loop_filter(v);
2916 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2917 // TODO: may need modification to handle slice coding
2918 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2919 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2920 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2924 memmove(v->cbp_base,
2925 v->cbp - s->mb_stride,
2926 sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
2927 memmove(v->ttblk_base,
2928 v->ttblk - s->mb_stride,
2929 sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
2930 memmove(v->is_intra_base,
2931 v->is_intra - s->mb_stride,
2932 sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
2933 if (!v->s.loop_filter)
2934 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2936 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2937 s->first_slice_line = 0;
2939 if (v->s.loop_filter)
2940 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2941 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2942 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2945 static void vc1_decode_skip_blocks(VC1Context *v)
2947 MpegEncContext *s = &v->s;
2949 if (!v->s.last_picture.f->data[0])
2952 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2953 s->first_slice_line = 1;
2954 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2956 init_block_index(v);
2957 ff_update_block_index(s);
2958 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2959 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2960 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2961 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2962 s->first_slice_line = 0;
2964 s->pict_type = AV_PICTURE_TYPE_P;
2967 void ff_vc1_decode_blocks(VC1Context *v)
2970 v->s.esc3_level_length = 0;
2972 ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
2973 &v->s.gb, &v->s.mb_x, &v->s.mb_y,
2974 2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
2975 v->s.loop_filter, v->s.low_delay);
2977 ff_er_add_slice(&v->s.er, 0, 0,
2978 (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
2982 v->left_blk_idx = -1;
2983 v->topleft_blk_idx = 1;
2985 switch (v->s.pict_type) {
2986 case AV_PICTURE_TYPE_I:
2987 if (v->profile == PROFILE_ADVANCED)
2988 vc1_decode_i_blocks_adv(v);
2990 vc1_decode_i_blocks(v);
2992 case AV_PICTURE_TYPE_P:
2993 if (v->p_frame_skipped)
2994 vc1_decode_skip_blocks(v);
2996 vc1_decode_p_blocks(v);
2998 case AV_PICTURE_TYPE_B:
3000 if (v->profile == PROFILE_ADVANCED)
3001 vc1_decode_i_blocks_adv(v);
3003 vc1_decode_i_blocks(v);
3005 vc1_decode_b_blocks(v);