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 /***********************************************************************/
50 * @name VC-1 Bitplane decoding
56 static inline void init_block_index(VC1Context *v)
58 MpegEncContext *s = &v->s;
59 ff_init_block_index(s);
60 if (v->field_mode && !(v->second_field ^ v->tff)) {
61 s->dest[0] += s->current_picture_ptr->f->linesize[0];
62 s->dest[1] += s->current_picture_ptr->f->linesize[1];
63 s->dest[2] += s->current_picture_ptr->f->linesize[2];
67 /** @} */ //Bitplane group
69 static void vc1_put_signed_blocks_clamped(VC1Context *v)
71 MpegEncContext *s = &v->s;
72 int topleft_mb_pos, top_mb_pos;
73 int stride_y, fieldtx = 0;
76 /* The put pixels loop is always one MB row behind the decoding loop,
77 * because we can only put pixels when overlap filtering is done, and
78 * for filtering of the bottom edge of a MB, we need the next MB row
80 * Within the row, the put pixels loop is also one MB col behind the
81 * decoding loop. The reason for this is again, because for filtering
82 * of the right MB edge, we need the next MB present. */
83 if (!s->first_slice_line) {
85 topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1;
86 if (v->fcm == ILACE_FRAME)
87 fieldtx = v->fieldtx_plane[topleft_mb_pos];
88 stride_y = s->linesize << fieldtx;
89 v_dist = (16 - fieldtx) >> (fieldtx == 0);
90 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],
91 s->dest[0] - 16 * s->linesize - 16,
93 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],
94 s->dest[0] - 16 * s->linesize - 8,
96 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],
97 s->dest[0] - v_dist * s->linesize - 16,
99 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],
100 s->dest[0] - v_dist * s->linesize - 8,
102 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],
103 s->dest[1] - 8 * s->uvlinesize - 8,
105 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],
106 s->dest[2] - 8 * s->uvlinesize - 8,
109 if (s->mb_x == s->mb_width - 1) {
110 top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x;
111 if (v->fcm == ILACE_FRAME)
112 fieldtx = v->fieldtx_plane[top_mb_pos];
113 stride_y = s->linesize << fieldtx;
114 v_dist = fieldtx ? 15 : 8;
115 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],
116 s->dest[0] - 16 * s->linesize,
118 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],
119 s->dest[0] - 16 * s->linesize + 8,
121 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],
122 s->dest[0] - v_dist * s->linesize,
124 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],
125 s->dest[0] - v_dist * s->linesize + 8,
127 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],
128 s->dest[1] - 8 * s->uvlinesize,
130 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],
131 s->dest[2] - 8 * s->uvlinesize,
136 #define inc_blk_idx(idx) do { \
138 if (idx >= v->n_allocated_blks) \
142 inc_blk_idx(v->topleft_blk_idx);
143 inc_blk_idx(v->top_blk_idx);
144 inc_blk_idx(v->left_blk_idx);
145 inc_blk_idx(v->cur_blk_idx);
148 /***********************************************************************/
150 * @name VC-1 Block-level functions
151 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
157 * @brief Get macroblock-level quantizer scale
159 #define GET_MQUANT() \
160 if (v->dquantfrm) { \
162 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
163 if (v->dqbilevel) { \
164 mquant = (get_bits1(gb)) ? v->altpq : v->pq; \
166 mqdiff = get_bits(gb, 3); \
168 mquant = v->pq + mqdiff; \
170 mquant = get_bits(gb, 5); \
173 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
174 edges = 1 << v->dqsbedge; \
175 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
176 edges = (3 << v->dqsbedge) % 15; \
177 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
179 if ((edges&1) && !s->mb_x) \
181 if ((edges&2) && s->first_slice_line) \
183 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
185 if ((edges&8) && s->mb_y == (s->mb_height - 1)) \
187 if (!mquant || mquant > 31) { \
188 av_log(v->s.avctx, AV_LOG_ERROR, \
189 "Overriding invalid mquant %d\n", mquant); \
195 * @def GET_MVDATA(_dmv_x, _dmv_y)
196 * @brief Get MV differentials
197 * @see MVDATA decoding from 8.3.5.2, p(1)20
198 * @param _dmv_x Horizontal differential for decoded MV
199 * @param _dmv_y Vertical differential for decoded MV
201 #define GET_MVDATA(_dmv_x, _dmv_y) \
202 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
203 VC1_MV_DIFF_VLC_BITS, 2); \
211 _dmv_x = _dmv_y = 0; \
212 } else if (index == 35) { \
213 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
214 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
215 } else if (index == 36) { \
220 index1 = index % 6; \
221 _dmv_x = offset_table[1][index1]; \
222 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
224 val = get_bits(gb, val); \
225 sign = 0 - (val & 1); \
226 _dmv_x = (sign ^ ((val >> 1) + _dmv_x)) - sign; \
229 index1 = index / 6; \
230 _dmv_y = offset_table[1][index1]; \
231 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
233 val = get_bits(gb, val); \
234 sign = 0 - (val & 1); \
235 _dmv_y = (sign ^ ((val >> 1) + _dmv_y)) - sign; \
239 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
240 int *dmv_y, int *pred_flag)
243 int extend_x, extend_y;
244 GetBitContext *gb = &v->s.gb;
249 bits = VC1_2REF_MVDATA_VLC_BITS;
252 bits = VC1_1REF_MVDATA_VLC_BITS;
255 extend_x = v->dmvrange & 1;
256 extend_y = (v->dmvrange >> 1) & 1;
257 index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
259 *dmv_x = get_bits(gb, v->k_x);
260 *dmv_y = get_bits(gb, v->k_y);
263 *pred_flag = *dmv_y & 1;
264 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
268 av_assert0(index < esc);
269 index1 = (index + 1) % 9;
271 val = get_bits(gb, index1 + extend_x);
272 sign = 0 - (val & 1);
273 *dmv_x = (sign ^ ((val >> 1) + offset_table[extend_x][index1])) - sign;
276 index1 = (index + 1) / 9;
277 if (index1 > v->numref) {
278 val = get_bits(gb, (index1 >> v->numref) + extend_y);
279 sign = 0 - (val & 1);
280 *dmv_y = (sign ^ ((val >> 1) + offset_table[extend_y][index1 >> v->numref])) - sign;
283 if (v->numref && pred_flag)
284 *pred_flag = index1 & 1;
288 /** Reconstruct motion vector for B-frame and do motion compensation
290 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
291 int direct, int mode)
298 if (mode == BMV_TYPE_INTERPOLATED) {
304 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
307 /** Get predicted DC value for I-frames only
308 * prediction dir: left=0, top=1
309 * @param s MpegEncContext
310 * @param overlap flag indicating that overlap filtering is used
311 * @param pq integer part of picture quantizer
312 * @param[in] n block index in the current MB
313 * @param dc_val_ptr Pointer to DC predictor
314 * @param dir_ptr Prediction direction for use in AC prediction
316 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
317 int16_t **dc_val_ptr, int *dir_ptr)
319 int a, b, c, wrap, pred, scale;
321 static const uint16_t dcpred[32] = {
322 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
323 114, 102, 93, 85, 79, 73, 68, 64,
324 60, 57, 54, 51, 49, 47, 45, 43,
325 41, 39, 38, 37, 35, 34, 33
328 /* find prediction - wmv3_dc_scale always used here in fact */
329 if (n < 4) scale = s->y_dc_scale;
330 else scale = s->c_dc_scale;
332 wrap = s->block_wrap[n];
333 dc_val = s->dc_val[0] + s->block_index[n];
339 b = dc_val[ - 1 - wrap];
342 if (pq < 9 || !overlap) {
343 /* Set outer values */
344 if (s->first_slice_line && (n != 2 && n != 3))
345 b = a = dcpred[scale];
346 if (s->mb_x == 0 && (n != 1 && n != 3))
347 b = c = dcpred[scale];
349 /* Set outer values */
350 if (s->first_slice_line && (n != 2 && n != 3))
352 if (s->mb_x == 0 && (n != 1 && n != 3))
356 if (abs(a - b) <= abs(b - c)) {
358 *dir_ptr = 1; // left
364 /* update predictor */
365 *dc_val_ptr = &dc_val[0];
370 /** Get predicted DC value
371 * prediction dir: left=0, top=1
372 * @param s MpegEncContext
373 * @param overlap flag indicating that overlap filtering is used
374 * @param pq integer part of picture quantizer
375 * @param[in] n block index in the current MB
376 * @param a_avail flag indicating top block availability
377 * @param c_avail flag indicating left block availability
378 * @param dc_val_ptr Pointer to DC predictor
379 * @param dir_ptr Prediction direction for use in AC prediction
381 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
382 int a_avail, int c_avail,
383 int16_t **dc_val_ptr, int *dir_ptr)
385 int a, b, c, wrap, pred;
387 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
391 /* scale predictors if needed */
392 q1 = s->current_picture.qscale_table[mb_pos];
393 dqscale_index = s->y_dc_scale_table[q1] - 1;
394 if (dqscale_index < 0)
397 wrap = s->block_wrap[n];
398 dc_val = s->dc_val[0] + s->block_index[n];
404 b = dc_val[ - 1 - wrap];
407 if (c_avail && (n != 1 && n != 3)) {
408 q2 = s->current_picture.qscale_table[mb_pos - 1];
410 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
412 if (a_avail && (n != 2 && n != 3)) {
413 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
415 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
417 if (a_avail && c_avail && (n != 3)) {
423 q2 = s->current_picture.qscale_table[off];
425 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
428 if (c_avail && (!a_avail || abs(a - b) <= abs(b - c))) {
430 *dir_ptr = 1; // left
431 } else if (a_avail) {
436 *dir_ptr = 1; // left
439 /* update predictor */
440 *dc_val_ptr = &dc_val[0];
444 /** @} */ // Block group
447 * @name VC1 Macroblock-level functions in Simple/Main Profiles
448 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
452 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
453 uint8_t **coded_block_ptr)
455 int xy, wrap, pred, a, b, c;
457 xy = s->block_index[n];
463 a = s->coded_block[xy - 1 ];
464 b = s->coded_block[xy - 1 - wrap];
465 c = s->coded_block[xy - wrap];
474 *coded_block_ptr = &s->coded_block[xy];
480 * Decode one AC coefficient
481 * @param v The VC1 context
482 * @param last Last coefficient
483 * @param skip How much zero coefficients to skip
484 * @param value Decoded AC coefficient value
485 * @param codingset set of VLC to decode data
488 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
489 int *value, int codingset)
491 GetBitContext *gb = &v->s.gb;
492 int index, run, level, lst, sign;
494 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
495 if (index != ff_vc1_ac_sizes[codingset] - 1) {
496 run = vc1_index_decode_table[codingset][index][0];
497 level = vc1_index_decode_table[codingset][index][1];
498 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
499 sign = get_bits1(gb);
501 int escape = decode210(gb);
503 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
504 run = vc1_index_decode_table[codingset][index][0];
505 level = vc1_index_decode_table[codingset][index][1];
506 lst = index >= vc1_last_decode_table[codingset];
509 level += vc1_last_delta_level_table[codingset][run];
511 level += vc1_delta_level_table[codingset][run];
514 run += vc1_last_delta_run_table[codingset][level] + 1;
516 run += vc1_delta_run_table[codingset][level] + 1;
518 sign = get_bits1(gb);
521 if (v->s.esc3_level_length == 0) {
522 if (v->pq < 8 || v->dquantfrm) { // table 59
523 v->s.esc3_level_length = get_bits(gb, 3);
524 if (!v->s.esc3_level_length)
525 v->s.esc3_level_length = get_bits(gb, 2) + 8;
527 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
529 v->s.esc3_run_length = 3 + get_bits(gb, 2);
531 run = get_bits(gb, v->s.esc3_run_length);
532 sign = get_bits1(gb);
533 level = get_bits(gb, v->s.esc3_level_length);
539 *value = (level ^ -sign) + sign;
542 /** Decode intra block in intra frames - should be faster than decode_intra_block
543 * @param v VC1Context
544 * @param block block to decode
545 * @param[in] n subblock index
546 * @param coded are AC coeffs present or not
547 * @param codingset set of VLC to decode data
549 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
550 int coded, int codingset)
552 GetBitContext *gb = &v->s.gb;
553 MpegEncContext *s = &v->s;
554 int dc_pred_dir = 0; /* Direction of the DC prediction used */
557 int16_t *ac_val, *ac_val2;
560 /* Get DC differential */
562 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
564 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
567 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
571 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
572 if (dcdiff == 119 /* ESC index value */) {
573 dcdiff = get_bits(gb, 8 + m);
576 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
583 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
586 /* Store the quantized DC coeff, used for prediction */
588 scale = s->y_dc_scale;
590 scale = s->c_dc_scale;
591 block[0] = dcdiff * scale;
593 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
595 if (dc_pred_dir) // left
598 ac_val -= 16 * s->block_wrap[n];
600 scale = v->pq * 2 + v->halfpq;
606 int last = 0, skip, value;
607 const uint8_t *zz_table;
612 zz_table = v->zz_8x8[2];
614 zz_table = v->zz_8x8[3];
616 zz_table = v->zz_8x8[1];
619 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
623 block[zz_table[i++]] = value;
626 /* apply AC prediction if needed */
629 if (dc_pred_dir) { // left
635 for (k = 1; k < 8; k++)
636 block[k << sh] += ac_val[k];
638 /* save AC coeffs for further prediction */
639 for (k = 1; k < 8; k++) {
640 ac_val2[k] = block[k << v->left_blk_sh];
641 ac_val2[k + 8] = block[k << v->top_blk_sh];
644 /* scale AC coeffs */
645 for (k = 1; k < 64; k++)
649 block[k] += (block[k] < 0) ? -v->pq : v->pq;
655 memset(ac_val2, 0, 16 * 2);
657 /* apply AC prediction if needed */
660 if (dc_pred_dir) { //left
667 memcpy(ac_val2, ac_val, 8 * 2);
668 for (k = 1; k < 8; k++) {
669 block[k << sh] = ac_val[k] * scale;
670 if (!v->pquantizer && block[k << sh])
671 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
675 if (s->ac_pred) i = 63;
676 s->block_last_index[n] = i;
681 /** Decode intra block in intra frames - should be faster than decode_intra_block
682 * @param v VC1Context
683 * @param block block to decode
684 * @param[in] n subblock number
685 * @param coded are AC coeffs present or not
686 * @param codingset set of VLC to decode data
687 * @param mquant quantizer value for this macroblock
689 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
690 int coded, int codingset, int mquant)
692 GetBitContext *gb = &v->s.gb;
693 MpegEncContext *s = &v->s;
694 int dc_pred_dir = 0; /* Direction of the DC prediction used */
696 int16_t *dc_val = NULL;
697 int16_t *ac_val, *ac_val2;
699 int a_avail = v->a_avail, c_avail = v->c_avail;
700 int use_pred = s->ac_pred;
703 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
705 /* Get DC differential */
707 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
709 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
712 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
716 const int m = (mquant == 1 || mquant == 2) ? 3 - mquant : 0;
717 if (dcdiff == 119 /* ESC index value */) {
718 dcdiff = get_bits(gb, 8 + m);
721 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
728 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
731 /* Store the quantized DC coeff, used for prediction */
733 scale = s->y_dc_scale;
735 scale = s->c_dc_scale;
736 block[0] = dcdiff * scale;
738 /* check if AC is needed at all */
739 if (!a_avail && !c_avail)
742 scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
744 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
746 if (dc_pred_dir) // left
749 ac_val -= 16 * s->block_wrap[n];
751 q1 = s->current_picture.qscale_table[mb_pos];
754 else if (dc_pred_dir) {
757 else if (c_avail && mb_pos)
758 q2 = s->current_picture.qscale_table[mb_pos - 1];
762 else if (a_avail && mb_pos >= s->mb_stride)
763 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
770 int last = 0, skip, value;
771 const uint8_t *zz_table;
775 if (!use_pred && v->fcm == ILACE_FRAME) {
776 zz_table = v->zzi_8x8;
778 if (!dc_pred_dir) // top
779 zz_table = v->zz_8x8[2];
781 zz_table = v->zz_8x8[3];
784 if (v->fcm != ILACE_FRAME)
785 zz_table = v->zz_8x8[1];
787 zz_table = v->zzi_8x8;
791 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
795 block[zz_table[i++]] = value;
798 /* apply AC prediction if needed */
801 if (dc_pred_dir) { // left
807 /* scale predictors if needed*/
808 if (q2 && q1 != q2) {
809 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
811 return AVERROR_INVALIDDATA;
812 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
813 for (k = 1; k < 8; k++)
814 block[k << sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
816 for (k = 1; k < 8; k++)
817 block[k << sh] += ac_val[k];
820 /* save AC coeffs for further prediction */
821 for (k = 1; k < 8; k++) {
822 ac_val2[k ] = block[k << v->left_blk_sh];
823 ac_val2[k + 8] = block[k << v->top_blk_sh];
826 /* scale AC coeffs */
827 for (k = 1; k < 64; k++)
831 block[k] += (block[k] < 0) ? -mquant : mquant;
834 } else { // no AC coeffs
837 memset(ac_val2, 0, 16 * 2);
839 /* apply AC prediction if needed */
842 if (dc_pred_dir) { // left
849 memcpy(ac_val2, ac_val, 8 * 2);
850 if (q2 && q1 != q2) {
851 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
852 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
854 return AVERROR_INVALIDDATA;
855 for (k = 1; k < 8; k++)
856 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
858 for (k = 1; k < 8; k++) {
859 block[k << sh] = ac_val2[k] * scale;
860 if (!v->pquantizer && block[k << sh])
861 block[k << sh] += (block[k << sh] < 0) ? -mquant : mquant;
865 if (use_pred) i = 63;
866 s->block_last_index[n] = i;
871 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
872 * @param v VC1Context
873 * @param block block to decode
874 * @param[in] n subblock index
875 * @param coded are AC coeffs present or not
876 * @param mquant block quantizer
877 * @param codingset set of VLC to decode data
879 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
880 int coded, int mquant, int codingset)
882 GetBitContext *gb = &v->s.gb;
883 MpegEncContext *s = &v->s;
884 int dc_pred_dir = 0; /* Direction of the DC prediction used */
886 int16_t *dc_val = NULL;
887 int16_t *ac_val, *ac_val2;
889 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
890 int a_avail = v->a_avail, c_avail = v->c_avail;
891 int use_pred = s->ac_pred;
895 s->bdsp.clear_block(block);
897 /* XXX: Guard against dumb values of mquant */
898 mquant = av_clip_uintp2(mquant, 5);
900 /* Set DC scale - y and c use the same */
901 s->y_dc_scale = s->y_dc_scale_table[mquant];
902 s->c_dc_scale = s->c_dc_scale_table[mquant];
904 /* Get DC differential */
906 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
908 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
911 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
915 const int m = (mquant == 1 || mquant == 2) ? 3 - mquant : 0;
916 if (dcdiff == 119 /* ESC index value */) {
917 dcdiff = get_bits(gb, 8 + m);
920 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
927 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
930 /* Store the quantized DC coeff, used for prediction */
933 block[0] = dcdiff * s->y_dc_scale;
935 block[0] = dcdiff * s->c_dc_scale;
941 /* check if AC is needed at all and adjust direction if needed */
942 if (!a_avail) dc_pred_dir = 1;
943 if (!c_avail) dc_pred_dir = 0;
944 if (!a_avail && !c_avail) use_pred = 0;
945 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
948 scale = mquant * 2 + v->halfpq;
950 if (dc_pred_dir) //left
953 ac_val -= 16 * s->block_wrap[n];
955 q1 = s->current_picture.qscale_table[mb_pos];
956 if (dc_pred_dir && c_avail && mb_pos)
957 q2 = s->current_picture.qscale_table[mb_pos - 1];
958 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
959 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
960 if ( dc_pred_dir && n == 1)
962 if (!dc_pred_dir && n == 2)
967 int last = 0, skip, value;
971 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
975 if (v->fcm == PROGRESSIVE)
976 block[v->zz_8x8[0][i++]] = value;
978 if (use_pred && (v->fcm == ILACE_FRAME)) {
979 if (!dc_pred_dir) // top
980 block[v->zz_8x8[2][i++]] = value;
982 block[v->zz_8x8[3][i++]] = value;
984 block[v->zzi_8x8[i++]] = value;
989 /* apply AC prediction if needed */
991 /* scale predictors if needed*/
992 if (q2 && q1 != q2) {
993 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
994 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
997 return AVERROR_INVALIDDATA;
998 if (dc_pred_dir) { // left
999 for (k = 1; k < 8; k++)
1000 block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1002 for (k = 1; k < 8; k++)
1003 block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1006 if (dc_pred_dir) { // left
1007 for (k = 1; k < 8; k++)
1008 block[k << v->left_blk_sh] += ac_val[k];
1010 for (k = 1; k < 8; k++)
1011 block[k << v->top_blk_sh] += ac_val[k + 8];
1015 /* save AC coeffs for further prediction */
1016 for (k = 1; k < 8; k++) {
1017 ac_val2[k ] = block[k << v->left_blk_sh];
1018 ac_val2[k + 8] = block[k << v->top_blk_sh];
1021 /* scale AC coeffs */
1022 for (k = 1; k < 64; k++)
1026 block[k] += (block[k] < 0) ? -mquant : mquant;
1029 if (use_pred) i = 63;
1030 } else { // no AC coeffs
1033 memset(ac_val2, 0, 16 * 2);
1034 if (dc_pred_dir) { // left
1036 memcpy(ac_val2, ac_val, 8 * 2);
1037 if (q2 && q1 != q2) {
1038 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
1039 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
1041 return AVERROR_INVALIDDATA;
1042 for (k = 1; k < 8; k++)
1043 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1048 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1049 if (q2 && q1 != q2) {
1050 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
1051 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
1053 return AVERROR_INVALIDDATA;
1054 for (k = 1; k < 8; k++)
1055 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1060 /* apply AC prediction if needed */
1062 if (dc_pred_dir) { // left
1063 for (k = 1; k < 8; k++) {
1064 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1065 if (!v->pquantizer && block[k << v->left_blk_sh])
1066 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
1069 for (k = 1; k < 8; k++) {
1070 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1071 if (!v->pquantizer && block[k << v->top_blk_sh])
1072 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
1078 s->block_last_index[n] = i;
1085 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1086 int mquant, int ttmb, int first_block,
1087 uint8_t *dst, int linesize, int skip_block,
1090 MpegEncContext *s = &v->s;
1091 GetBitContext *gb = &s->gb;
1094 int scale, off, idx, last, skip, value;
1095 int ttblk = ttmb & 7;
1098 s->bdsp.clear_block(block);
1101 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)];
1103 if (ttblk == TT_4X4) {
1104 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1106 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1107 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1108 || (!v->res_rtm_flag && !first_block))) {
1109 subblkpat = decode012(gb);
1111 subblkpat ^= 3; // swap decoded pattern bits
1112 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1114 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1117 scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
1119 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1120 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1121 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1124 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1125 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1134 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1139 idx = v->zz_8x8[0][i++];
1141 idx = v->zzi_8x8[i++];
1142 block[idx] = value * scale;
1144 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1148 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1150 v->vc1dsp.vc1_inv_trans_8x8(block);
1151 s->idsp.add_pixels_clamped(block, dst, linesize);
1156 pat = ~subblkpat & 0xF;
1157 for (j = 0; j < 4; j++) {
1158 last = subblkpat & (1 << (3 - j));
1160 off = (j & 1) * 4 + (j & 2) * 16;
1162 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1167 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1169 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1170 block[idx + off] = value * scale;
1172 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
1174 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1176 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1178 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1183 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1184 for (j = 0; j < 2; j++) {
1185 last = subblkpat & (1 << (1 - j));
1189 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1194 idx = v->zz_8x4[i++] + off;
1196 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1197 block[idx] = value * scale;
1199 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1201 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1203 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1205 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1210 pat = ~(subblkpat * 5) & 0xF;
1211 for (j = 0; j < 2; j++) {
1212 last = subblkpat & (1 << (1 - j));
1216 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1221 idx = v->zz_4x8[i++] + off;
1223 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1224 block[idx] = value * scale;
1226 block[idx] += (block[idx] < 0) ? -mquant : mquant;
1228 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1230 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1232 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1238 *ttmb_out |= ttblk << (n * 4);
1242 /** @} */ // Macroblock group
1244 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1246 /** Decode one P-frame MB
1248 static int vc1_decode_p_mb(VC1Context *v)
1250 MpegEncContext *s = &v->s;
1251 GetBitContext *gb = &s->gb;
1253 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1254 int cbp; /* cbp decoding stuff */
1255 int mqdiff, mquant; /* MB quantization */
1256 int ttmb = v->ttfrm; /* MB Transform type */
1258 int mb_has_coeffs = 1; /* last_flag */
1259 int dmv_x, dmv_y; /* Differential MV components */
1260 int index, index1; /* LUT indexes */
1261 int val, sign; /* temp values */
1262 int first_block = 1;
1264 int skipped, fourmv;
1265 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1267 mquant = v->pq; /* lossy initialization */
1269 if (v->mv_type_is_raw)
1270 fourmv = get_bits1(gb);
1272 fourmv = v->mv_type_mb_plane[mb_pos];
1274 skipped = get_bits1(gb);
1276 skipped = v->s.mbskip_table[mb_pos];
1278 if (!fourmv) { /* 1MV mode */
1280 GET_MVDATA(dmv_x, dmv_y);
1283 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1284 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1286 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1287 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1289 /* FIXME Set DC val for inter block ? */
1290 if (s->mb_intra && !mb_has_coeffs) {
1292 s->ac_pred = get_bits1(gb);
1294 } else if (mb_has_coeffs) {
1296 s->ac_pred = get_bits1(gb);
1297 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1303 s->current_picture.qscale_table[mb_pos] = mquant;
1305 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1306 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
1307 VC1_TTMB_VLC_BITS, 2);
1308 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1310 for (i = 0; i < 6; i++) {
1311 s->dc_val[0][s->block_index[i]] = 0;
1313 val = ((cbp >> (5 - i)) & 1);
1314 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1315 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1317 /* check if prediction blocks A and C are available */
1318 v->a_avail = v->c_avail = 0;
1319 if (i == 2 || i == 3 || !s->first_slice_line)
1320 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1321 if (i == 1 || i == 3 || s->mb_x)
1322 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1324 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1325 (i & 4) ? v->codingset2 : v->codingset);
1326 if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
1328 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1330 for (j = 0; j < 64; j++)
1331 s->block[i][j] <<= 1;
1332 s->idsp.put_signed_pixels_clamped(s->block[i],
1333 s->dest[dst_idx] + off,
1334 i & 4 ? s->uvlinesize
1336 if (v->pq >= 9 && v->overlap) {
1338 v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1340 v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1342 block_cbp |= 0xF << (i << 2);
1343 block_intra |= 1 << i;
1345 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,
1346 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1347 (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
1348 block_cbp |= pat << (i << 2);
1349 if (!v->ttmbf && ttmb < 8)
1356 for (i = 0; i < 6; i++) {
1357 v->mb_type[0][s->block_index[i]] = 0;
1358 s->dc_val[0][s->block_index[i]] = 0;
1360 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1361 s->current_picture.qscale_table[mb_pos] = 0;
1362 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1363 ff_vc1_mc_1mv(v, 0);
1365 } else { // 4MV mode
1366 if (!skipped /* unskipped MB */) {
1367 int intra_count = 0, coded_inter = 0;
1368 int is_intra[6], is_coded[6];
1370 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1371 for (i = 0; i < 6; i++) {
1372 val = ((cbp >> (5 - i)) & 1);
1373 s->dc_val[0][s->block_index[i]] = 0;
1380 GET_MVDATA(dmv_x, dmv_y);
1382 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1384 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1385 intra_count += s->mb_intra;
1386 is_intra[i] = s->mb_intra;
1387 is_coded[i] = mb_has_coeffs;
1390 is_intra[i] = (intra_count >= 3);
1394 ff_vc1_mc_4mv_chroma(v, 0);
1395 v->mb_type[0][s->block_index[i]] = is_intra[i];
1397 coded_inter = !is_intra[i] & is_coded[i];
1399 // if there are no coded blocks then don't do anything more
1401 if (!intra_count && !coded_inter)
1404 s->current_picture.qscale_table[mb_pos] = mquant;
1405 /* test if block is intra and has pred */
1408 for (i = 0; i < 6; i++)
1410 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1411 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1417 s->ac_pred = get_bits1(gb);
1421 if (!v->ttmbf && coded_inter)
1422 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1423 for (i = 0; i < 6; i++) {
1425 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1426 s->mb_intra = is_intra[i];
1428 /* check if prediction blocks A and C are available */
1429 v->a_avail = v->c_avail = 0;
1430 if (i == 2 || i == 3 || !s->first_slice_line)
1431 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1432 if (i == 1 || i == 3 || s->mb_x)
1433 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1435 vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,
1436 (i & 4) ? v->codingset2 : v->codingset);
1437 if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
1439 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1441 for (j = 0; j < 64; j++)
1442 s->block[i][j] <<= 1;
1443 s->idsp.put_signed_pixels_clamped(s->block[i],
1444 s->dest[dst_idx] + off,
1445 (i & 4) ? s->uvlinesize
1447 if (v->pq >= 9 && v->overlap) {
1449 v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1451 v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
1453 block_cbp |= 0xF << (i << 2);
1454 block_intra |= 1 << i;
1455 } else if (is_coded[i]) {
1456 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1457 first_block, s->dest[dst_idx] + off,
1458 (i & 4) ? s->uvlinesize : s->linesize,
1459 (i & 4) && (s->flags & CODEC_FLAG_GRAY),
1461 block_cbp |= pat << (i << 2);
1462 if (!v->ttmbf && ttmb < 8)
1467 } else { // skipped MB
1469 s->current_picture.qscale_table[mb_pos] = 0;
1470 for (i = 0; i < 6; i++) {
1471 v->mb_type[0][s->block_index[i]] = 0;
1472 s->dc_val[0][s->block_index[i]] = 0;
1474 for (i = 0; i < 4; i++) {
1475 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1476 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1478 ff_vc1_mc_4mv_chroma(v, 0);
1479 s->current_picture.qscale_table[mb_pos] = 0;
1483 v->cbp[s->mb_x] = block_cbp;
1484 v->ttblk[s->mb_x] = block_tt;
1485 v->is_intra[s->mb_x] = block_intra;
1490 /* Decode one macroblock in an interlaced frame p picture */
1492 static int vc1_decode_p_mb_intfr(VC1Context *v)
1494 MpegEncContext *s = &v->s;
1495 GetBitContext *gb = &s->gb;
1497 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1498 int cbp = 0; /* cbp decoding stuff */
1499 int mqdiff, mquant; /* MB quantization */
1500 int ttmb = v->ttfrm; /* MB Transform type */
1502 int mb_has_coeffs = 1; /* last_flag */
1503 int dmv_x, dmv_y; /* Differential MV components */
1504 int val; /* temp value */
1505 int first_block = 1;
1507 int skipped, fourmv = 0, twomv = 0;
1508 int block_cbp = 0, pat, block_tt = 0;
1509 int idx_mbmode = 0, mvbp;
1510 int stride_y, fieldtx;
1512 mquant = v->pq; /* Lossy initialization */
1515 skipped = get_bits1(gb);
1517 skipped = v->s.mbskip_table[mb_pos];
1519 if (v->fourmvswitch)
1520 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1522 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1523 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1524 /* store the motion vector type in a flag (useful later) */
1525 case MV_PMODE_INTFR_4MV:
1527 v->blk_mv_type[s->block_index[0]] = 0;
1528 v->blk_mv_type[s->block_index[1]] = 0;
1529 v->blk_mv_type[s->block_index[2]] = 0;
1530 v->blk_mv_type[s->block_index[3]] = 0;
1532 case MV_PMODE_INTFR_4MV_FIELD:
1534 v->blk_mv_type[s->block_index[0]] = 1;
1535 v->blk_mv_type[s->block_index[1]] = 1;
1536 v->blk_mv_type[s->block_index[2]] = 1;
1537 v->blk_mv_type[s->block_index[3]] = 1;
1539 case MV_PMODE_INTFR_2MV_FIELD:
1541 v->blk_mv_type[s->block_index[0]] = 1;
1542 v->blk_mv_type[s->block_index[1]] = 1;
1543 v->blk_mv_type[s->block_index[2]] = 1;
1544 v->blk_mv_type[s->block_index[3]] = 1;
1546 case MV_PMODE_INTFR_1MV:
1547 v->blk_mv_type[s->block_index[0]] = 0;
1548 v->blk_mv_type[s->block_index[1]] = 0;
1549 v->blk_mv_type[s->block_index[2]] = 0;
1550 v->blk_mv_type[s->block_index[3]] = 0;
1553 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1554 for (i = 0; i < 4; i++) {
1555 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1556 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1558 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1560 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1561 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1562 mb_has_coeffs = get_bits1(gb);
1564 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1565 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1567 s->current_picture.qscale_table[mb_pos] = mquant;
1568 /* Set DC scale - y and c use the same (not sure if necessary here) */
1569 s->y_dc_scale = s->y_dc_scale_table[mquant];
1570 s->c_dc_scale = s->c_dc_scale_table[mquant];
1572 for (i = 0; i < 6; i++) {
1573 v->a_avail = v->c_avail = 0;
1574 v->mb_type[0][s->block_index[i]] = 1;
1575 s->dc_val[0][s->block_index[i]] = 0;
1577 val = ((cbp >> (5 - i)) & 1);
1578 if (i == 2 || i == 3 || !s->first_slice_line)
1579 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1580 if (i == 1 || i == 3 || s->mb_x)
1581 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1583 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1584 (i & 4) ? v->codingset2 : v->codingset);
1585 if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
1586 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1588 stride_y = s->linesize << fieldtx;
1589 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1591 stride_y = s->uvlinesize;
1594 s->idsp.put_signed_pixels_clamped(s->block[i],
1595 s->dest[dst_idx] + off,
1600 } else { // inter MB
1601 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1603 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1604 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1605 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1607 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1608 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1609 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1612 s->mb_intra = v->is_intra[s->mb_x] = 0;
1613 for (i = 0; i < 6; i++)
1614 v->mb_type[0][s->block_index[i]] = 0;
1615 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1616 /* for all motion vector read MVDATA and motion compensate each block */
1620 for (i = 0; i < 4; i++) {
1622 if (mvbp & (8 >> i))
1623 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1624 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
1625 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1627 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1632 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1634 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1635 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1636 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1639 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1641 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
1642 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1643 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1644 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1646 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1649 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1651 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1652 ff_vc1_mc_1mv(v, 0);
1655 GET_MQUANT(); // p. 227
1656 s->current_picture.qscale_table[mb_pos] = mquant;
1657 if (!v->ttmbf && cbp)
1658 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1659 for (i = 0; i < 6; i++) {
1660 s->dc_val[0][s->block_index[i]] = 0;
1662 val = ((cbp >> (5 - i)) & 1);
1664 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1666 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1668 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1669 first_block, s->dest[dst_idx] + off,
1670 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1671 (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
1672 block_cbp |= pat << (i << 2);
1673 if (!v->ttmbf && ttmb < 8)
1680 s->mb_intra = v->is_intra[s->mb_x] = 0;
1681 for (i = 0; i < 6; i++) {
1682 v->mb_type[0][s->block_index[i]] = 0;
1683 s->dc_val[0][s->block_index[i]] = 0;
1685 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1686 s->current_picture.qscale_table[mb_pos] = 0;
1687 v->blk_mv_type[s->block_index[0]] = 0;
1688 v->blk_mv_type[s->block_index[1]] = 0;
1689 v->blk_mv_type[s->block_index[2]] = 0;
1690 v->blk_mv_type[s->block_index[3]] = 0;
1691 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
1692 ff_vc1_mc_1mv(v, 0);
1694 if (s->mb_x == s->mb_width - 1)
1695 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);
1699 static int vc1_decode_p_mb_intfi(VC1Context *v)
1701 MpegEncContext *s = &v->s;
1702 GetBitContext *gb = &s->gb;
1704 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1705 int cbp = 0; /* cbp decoding stuff */
1706 int mqdiff, mquant; /* MB quantization */
1707 int ttmb = v->ttfrm; /* MB Transform type */
1709 int mb_has_coeffs = 1; /* last_flag */
1710 int dmv_x, dmv_y; /* Differential MV components */
1711 int val; /* temp values */
1712 int first_block = 1;
1715 int block_cbp = 0, pat, block_tt = 0;
1718 mquant = v->pq; /* Lossy initialization */
1720 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1721 if (idx_mbmode <= 1) { // intra MB
1722 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1724 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1725 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1726 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1728 s->current_picture.qscale_table[mb_pos] = mquant;
1729 /* Set DC scale - y and c use the same (not sure if necessary here) */
1730 s->y_dc_scale = s->y_dc_scale_table[mquant];
1731 s->c_dc_scale = s->c_dc_scale_table[mquant];
1732 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1733 mb_has_coeffs = idx_mbmode & 1;
1735 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
1737 for (i = 0; i < 6; i++) {
1738 v->a_avail = v->c_avail = 0;
1739 v->mb_type[0][s->block_index[i]] = 1;
1740 s->dc_val[0][s->block_index[i]] = 0;
1742 val = ((cbp >> (5 - i)) & 1);
1743 if (i == 2 || i == 3 || !s->first_slice_line)
1744 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1745 if (i == 1 || i == 3 || s->mb_x)
1746 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1748 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1749 (i & 4) ? v->codingset2 : v->codingset);
1750 if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
1752 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1753 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1754 s->idsp.put_signed_pixels_clamped(s->block[i],
1755 s->dest[dst_idx] + off,
1756 (i & 4) ? s->uvlinesize
1758 // TODO: loop filter
1761 s->mb_intra = v->is_intra[s->mb_x] = 0;
1762 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
1763 for (i = 0; i < 6; i++)
1764 v->mb_type[0][s->block_index[i]] = 0;
1765 if (idx_mbmode <= 5) { // 1-MV
1766 dmv_x = dmv_y = pred_flag = 0;
1767 if (idx_mbmode & 1) {
1768 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1770 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1771 ff_vc1_mc_1mv(v, 0);
1772 mb_has_coeffs = !(idx_mbmode & 2);
1774 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1775 for (i = 0; i < 4; i++) {
1776 dmv_x = dmv_y = pred_flag = 0;
1777 if (v->fourmvbp & (8 >> i))
1778 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
1779 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
1780 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1782 ff_vc1_mc_4mv_chroma(v, 0);
1783 mb_has_coeffs = idx_mbmode & 1;
1786 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1790 s->current_picture.qscale_table[mb_pos] = mquant;
1791 if (!v->ttmbf && cbp) {
1792 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1795 for (i = 0; i < 6; i++) {
1796 s->dc_val[0][s->block_index[i]] = 0;
1798 val = ((cbp >> (5 - i)) & 1);
1799 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
1801 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1802 first_block, s->dest[dst_idx] + off,
1803 (i & 4) ? s->uvlinesize : s->linesize,
1804 (i & 4) && (s->flags & CODEC_FLAG_GRAY),
1806 block_cbp |= pat << (i << 2);
1807 if (!v->ttmbf && ttmb < 8)
1813 if (s->mb_x == s->mb_width - 1)
1814 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
1818 /** Decode one B-frame MB (in Main profile)
1820 static void vc1_decode_b_mb(VC1Context *v)
1822 MpegEncContext *s = &v->s;
1823 GetBitContext *gb = &s->gb;
1825 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1826 int cbp = 0; /* cbp decoding stuff */
1827 int mqdiff, mquant; /* MB quantization */
1828 int ttmb = v->ttfrm; /* MB Transform type */
1829 int mb_has_coeffs = 0; /* last_flag */
1830 int index, index1; /* LUT indexes */
1831 int val, sign; /* temp values */
1832 int first_block = 1;
1834 int skipped, direct;
1835 int dmv_x[2], dmv_y[2];
1836 int bmvtype = BMV_TYPE_BACKWARD;
1838 mquant = v->pq; /* lossy initialization */
1842 direct = get_bits1(gb);
1844 direct = v->direct_mb_plane[mb_pos];
1846 skipped = get_bits1(gb);
1848 skipped = v->s.mbskip_table[mb_pos];
1850 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
1851 for (i = 0; i < 6; i++) {
1852 v->mb_type[0][s->block_index[i]] = 0;
1853 s->dc_val[0][s->block_index[i]] = 0;
1855 s->current_picture.qscale_table[mb_pos] = 0;
1859 GET_MVDATA(dmv_x[0], dmv_y[0]);
1860 dmv_x[1] = dmv_x[0];
1861 dmv_y[1] = dmv_y[0];
1863 if (skipped || !s->mb_intra) {
1864 bmvtype = decode012(gb);
1867 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
1870 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
1873 bmvtype = BMV_TYPE_INTERPOLATED;
1874 dmv_x[0] = dmv_y[0] = 0;
1878 for (i = 0; i < 6; i++)
1879 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1883 bmvtype = BMV_TYPE_INTERPOLATED;
1884 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1885 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1889 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1892 s->current_picture.qscale_table[mb_pos] = mquant;
1894 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1895 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
1896 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1897 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1899 if (!mb_has_coeffs && !s->mb_intra) {
1900 /* no coded blocks - effectively skipped */
1901 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1902 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1905 if (s->mb_intra && !mb_has_coeffs) {
1907 s->current_picture.qscale_table[mb_pos] = mquant;
1908 s->ac_pred = get_bits1(gb);
1910 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1912 if (bmvtype == BMV_TYPE_INTERPOLATED) {
1913 GET_MVDATA(dmv_x[0], dmv_y[0]);
1914 if (!mb_has_coeffs) {
1915 /* interpolated skipped block */
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 ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
1923 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
1926 s->ac_pred = get_bits1(gb);
1927 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
1929 s->current_picture.qscale_table[mb_pos] = mquant;
1930 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1931 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
1935 for (i = 0; i < 6; i++) {
1936 s->dc_val[0][s->block_index[i]] = 0;
1938 val = ((cbp >> (5 - i)) & 1);
1939 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1940 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1942 /* check if prediction blocks A and C are available */
1943 v->a_avail = v->c_avail = 0;
1944 if (i == 2 || i == 3 || !s->first_slice_line)
1945 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1946 if (i == 1 || i == 3 || s->mb_x)
1947 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1949 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
1950 (i & 4) ? v->codingset2 : v->codingset);
1951 if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
1953 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
1955 for (j = 0; j < 64; j++)
1956 s->block[i][j] <<= 1;
1957 s->idsp.put_signed_pixels_clamped(s->block[i],
1958 s->dest[dst_idx] + off,
1959 i & 4 ? s->uvlinesize
1962 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
1963 first_block, s->dest[dst_idx] + off,
1964 (i & 4) ? s->uvlinesize : s->linesize,
1965 (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
1966 if (!v->ttmbf && ttmb < 8)
1973 /** Decode one B-frame MB (in interlaced field B picture)
1975 static void vc1_decode_b_mb_intfi(VC1Context *v)
1977 MpegEncContext *s = &v->s;
1978 GetBitContext *gb = &s->gb;
1980 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1981 int cbp = 0; /* cbp decoding stuff */
1982 int mqdiff, mquant; /* MB quantization */
1983 int ttmb = v->ttfrm; /* MB Transform type */
1984 int mb_has_coeffs = 0; /* last_flag */
1985 int val; /* temp value */
1986 int first_block = 1;
1989 int dmv_x[2], dmv_y[2], pred_flag[2];
1990 int bmvtype = BMV_TYPE_BACKWARD;
1993 mquant = v->pq; /* Lossy initialization */
1996 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
1997 if (idx_mbmode <= 1) { // intra MB
1998 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2000 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2001 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2002 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2004 s->current_picture.qscale_table[mb_pos] = mquant;
2005 /* Set DC scale - y and c use the same (not sure if necessary here) */
2006 s->y_dc_scale = s->y_dc_scale_table[mquant];
2007 s->c_dc_scale = s->c_dc_scale_table[mquant];
2008 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2009 mb_has_coeffs = idx_mbmode & 1;
2011 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
2013 for (i = 0; i < 6; i++) {
2014 v->a_avail = v->c_avail = 0;
2015 v->mb_type[0][s->block_index[i]] = 1;
2016 s->dc_val[0][s->block_index[i]] = 0;
2018 val = ((cbp >> (5 - i)) & 1);
2019 if (i == 2 || i == 3 || !s->first_slice_line)
2020 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2021 if (i == 1 || i == 3 || s->mb_x)
2022 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2024 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2025 (i & 4) ? v->codingset2 : v->codingset);
2026 if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
2028 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2030 for (j = 0; j < 64; j++)
2031 s->block[i][j] <<= 1;
2032 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2033 s->idsp.put_signed_pixels_clamped(s->block[i],
2034 s->dest[dst_idx] + off,
2035 (i & 4) ? s->uvlinesize
2037 // TODO: yet to perform loop filter
2040 s->mb_intra = v->is_intra[s->mb_x] = 0;
2041 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
2042 for (i = 0; i < 6; i++)
2043 v->mb_type[0][s->block_index[i]] = 0;
2045 fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
2047 fwd = v->forward_mb_plane[mb_pos];
2048 if (idx_mbmode <= 5) { // 1-MV
2050 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
2051 pred_flag[0] = pred_flag[1] = 0;
2053 bmvtype = BMV_TYPE_FORWARD;
2055 bmvtype = decode012(gb);
2058 bmvtype = BMV_TYPE_BACKWARD;
2061 bmvtype = BMV_TYPE_DIRECT;
2064 bmvtype = BMV_TYPE_INTERPOLATED;
2065 interpmvp = get_bits1(gb);
2068 v->bmvtype = bmvtype;
2069 if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
2070 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2073 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
2075 if (bmvtype == BMV_TYPE_DIRECT) {
2076 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2077 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
2078 if (!s->next_picture_ptr->field_picture) {
2079 av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
2083 ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
2084 vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
2085 mb_has_coeffs = !(idx_mbmode & 2);
2088 bmvtype = BMV_TYPE_FORWARD;
2089 v->bmvtype = bmvtype;
2090 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2091 for (i = 0; i < 4; i++) {
2092 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
2093 dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
2094 if (v->fourmvbp & (8 >> i)) {
2095 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
2096 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
2097 &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
2099 ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
2100 ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
2102 ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
2103 mb_has_coeffs = idx_mbmode & 1;
2106 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2110 s->current_picture.qscale_table[mb_pos] = mquant;
2111 if (!v->ttmbf && cbp) {
2112 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2115 for (i = 0; i < 6; i++) {
2116 s->dc_val[0][s->block_index[i]] = 0;
2118 val = ((cbp >> (5 - i)) & 1);
2119 off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
2121 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2122 first_block, s->dest[dst_idx] + off,
2123 (i & 4) ? s->uvlinesize : s->linesize,
2124 (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
2125 if (!v->ttmbf && ttmb < 8)
2133 /** Decode one B-frame MB (in interlaced frame B picture)
2135 static int vc1_decode_b_mb_intfr(VC1Context *v)
2137 MpegEncContext *s = &v->s;
2138 GetBitContext *gb = &s->gb;
2140 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2141 int cbp = 0; /* cbp decoding stuff */
2142 int mqdiff, mquant; /* MB quantization */
2143 int ttmb = v->ttfrm; /* MB Transform type */
2144 int mvsw = 0; /* motion vector switch */
2145 int mb_has_coeffs = 1; /* last_flag */
2146 int dmv_x, dmv_y; /* Differential MV components */
2147 int val; /* temp value */
2148 int first_block = 1;
2150 int skipped, direct, twomv = 0;
2151 int block_cbp = 0, pat, block_tt = 0;
2152 int idx_mbmode = 0, mvbp;
2153 int stride_y, fieldtx;
2154 int bmvtype = BMV_TYPE_BACKWARD;
2157 mquant = v->pq; /* Lossy initialization */
2160 skipped = get_bits1(gb);
2162 skipped = v->s.mbskip_table[mb_pos];
2165 idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
2166 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
2168 v->blk_mv_type[s->block_index[0]] = 1;
2169 v->blk_mv_type[s->block_index[1]] = 1;
2170 v->blk_mv_type[s->block_index[2]] = 1;
2171 v->blk_mv_type[s->block_index[3]] = 1;
2173 v->blk_mv_type[s->block_index[0]] = 0;
2174 v->blk_mv_type[s->block_index[1]] = 0;
2175 v->blk_mv_type[s->block_index[2]] = 0;
2176 v->blk_mv_type[s->block_index[3]] = 0;
2181 direct = get_bits1(gb);
2183 direct = v->direct_mb_plane[mb_pos];
2186 if (s->next_picture_ptr->field_picture)
2187 av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
2188 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);
2189 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);
2190 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);
2191 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);
2194 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);
2195 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);
2196 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);
2197 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);
2199 for (i = 1; i < 4; i += 2) {
2200 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
2201 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
2202 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
2203 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
2206 for (i = 1; i < 4; i++) {
2207 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
2208 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
2209 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
2210 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
2215 if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
2216 for (i = 0; i < 4; i++) {
2217 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
2218 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
2219 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
2220 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
2222 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
2224 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2225 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
2226 mb_has_coeffs = get_bits1(gb);
2228 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2229 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
2231 s->current_picture.qscale_table[mb_pos] = mquant;
2232 /* Set DC scale - y and c use the same (not sure if necessary here) */
2233 s->y_dc_scale = s->y_dc_scale_table[mquant];
2234 s->c_dc_scale = s->c_dc_scale_table[mquant];
2236 for (i = 0; i < 6; i++) {
2237 v->a_avail = v->c_avail = 0;
2238 v->mb_type[0][s->block_index[i]] = 1;
2239 s->dc_val[0][s->block_index[i]] = 0;
2241 val = ((cbp >> (5 - i)) & 1);
2242 if (i == 2 || i == 3 || !s->first_slice_line)
2243 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
2244 if (i == 1 || i == 3 || s->mb_x)
2245 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
2247 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
2248 (i & 4) ? v->codingset2 : v->codingset);
2249 if (i > 3 && (s->flags & CODEC_FLAG_GRAY))
2251 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
2253 stride_y = s->linesize << fieldtx;
2254 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
2256 stride_y = s->uvlinesize;
2259 s->idsp.put_signed_pixels_clamped(s->block[i],
2260 s->dest[dst_idx] + off,
2264 s->mb_intra = v->is_intra[s->mb_x] = 0;
2266 if (skipped || !s->mb_intra) {
2267 bmvtype = decode012(gb);
2270 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
2273 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
2276 bmvtype = BMV_TYPE_INTERPOLATED;
2280 if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
2281 mvsw = get_bits1(gb);
2284 if (!skipped) { // inter MB
2285 mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
2287 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
2289 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
2290 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
2291 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
2292 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
2296 for (i = 0; i < 6; i++)
2297 v->mb_type[0][s->block_index[i]] = 0;
2298 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
2299 /* for all motion vector read MVDATA and motion compensate each block */
2303 for (i = 0; i < 4; i++) {
2304 ff_vc1_mc_4mv_luma(v, i, 0, 0);
2305 ff_vc1_mc_4mv_luma(v, i, 1, 1);
2307 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2308 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2310 ff_vc1_mc_1mv(v, 0);
2311 ff_vc1_interp_mc(v);
2313 } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
2315 for (i = 0; i < 4; i++) {
2318 val = ((mvbp >> (3 - i)) & 1);
2320 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2322 ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2323 ff_vc1_mc_4mv_luma(v, j, dir, dir);
2324 ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
2327 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
2328 ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
2329 } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
2333 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2335 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2336 ff_vc1_mc_1mv(v, 0);
2340 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2342 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2343 ff_vc1_interp_mc(v);
2345 dir = bmvtype == BMV_TYPE_BACKWARD;
2352 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2353 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
2357 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
2358 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
2361 for (i = 0; i < 2; i++) {
2362 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];
2363 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];
2364 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];
2365 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];
2368 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2369 ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
2372 ff_vc1_mc_4mv_luma(v, 0, dir, 0);
2373 ff_vc1_mc_4mv_luma(v, 1, dir, 0);
2374 ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
2375 ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
2376 ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
2378 dir = bmvtype == BMV_TYPE_BACKWARD;
2380 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
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], dir);
2386 v->blk_mv_type[s->block_index[0]] = 1;
2387 v->blk_mv_type[s->block_index[1]] = 1;
2388 v->blk_mv_type[s->block_index[2]] = 1;
2389 v->blk_mv_type[s->block_index[3]] = 1;
2390 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2391 for (i = 0; i < 2; i++) {
2392 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];
2393 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];
2395 ff_vc1_mc_1mv(v, dir);
2399 GET_MQUANT(); // p. 227
2400 s->current_picture.qscale_table[mb_pos] = mquant;
2401 if (!v->ttmbf && cbp)
2402 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
2403 for (i = 0; i < 6; i++) {
2404 s->dc_val[0][s->block_index[i]] = 0;
2406 val = ((cbp >> (5 - i)) & 1);
2408 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
2410 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
2412 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
2413 first_block, s->dest[dst_idx] + off,
2414 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
2415 (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
2416 block_cbp |= pat << (i << 2);
2417 if (!v->ttmbf && ttmb < 8)
2425 for (i = 0; i < 6; i++) {
2426 v->mb_type[0][s->block_index[i]] = 0;
2427 s->dc_val[0][s->block_index[i]] = 0;
2429 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
2430 s->current_picture.qscale_table[mb_pos] = 0;
2431 v->blk_mv_type[s->block_index[0]] = 0;
2432 v->blk_mv_type[s->block_index[1]] = 0;
2433 v->blk_mv_type[s->block_index[2]] = 0;
2434 v->blk_mv_type[s->block_index[3]] = 0;
2437 if (bmvtype == BMV_TYPE_INTERPOLATED) {
2438 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
2439 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
2441 dir = bmvtype == BMV_TYPE_BACKWARD;
2442 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
2447 for (i = 0; i < 2; i++) {
2448 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];
2449 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];
2450 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];
2451 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];
2454 v->blk_mv_type[s->block_index[0]] = 1;
2455 v->blk_mv_type[s->block_index[1]] = 1;
2456 v->blk_mv_type[s->block_index[2]] = 1;
2457 v->blk_mv_type[s->block_index[3]] = 1;
2458 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
2459 for (i = 0; i < 2; i++) {
2460 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];
2461 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];
2467 ff_vc1_mc_1mv(v, dir);
2468 if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
2469 ff_vc1_interp_mc(v);
2473 if (s->mb_x == s->mb_width - 1)
2474 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
2475 v->cbp[s->mb_x] = block_cbp;
2476 v->ttblk[s->mb_x] = block_tt;
2480 /** Decode blocks of I-frame
2482 static void vc1_decode_i_blocks(VC1Context *v)
2485 MpegEncContext *s = &v->s;
2490 /* select codingmode used for VLC tables selection */
2491 switch (v->y_ac_table_index) {
2493 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2496 v->codingset = CS_HIGH_MOT_INTRA;
2499 v->codingset = CS_MID_RATE_INTRA;
2503 switch (v->c_ac_table_index) {
2505 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2508 v->codingset2 = CS_HIGH_MOT_INTER;
2511 v->codingset2 = CS_MID_RATE_INTER;
2515 /* Set DC scale - y and c use the same */
2516 s->y_dc_scale = s->y_dc_scale_table[v->pq];
2517 s->c_dc_scale = s->c_dc_scale_table[v->pq];
2520 s->mb_x = s->mb_y = 0;
2522 s->first_slice_line = 1;
2523 for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {
2525 init_block_index(v);
2526 for (; s->mb_x < v->end_mb_x; s->mb_x++) {
2528 ff_update_block_index(s);
2529 dst[0] = s->dest[0];
2530 dst[1] = dst[0] + 8;
2531 dst[2] = s->dest[0] + s->linesize * 8;
2532 dst[3] = dst[2] + 8;
2533 dst[4] = s->dest[1];
2534 dst[5] = s->dest[2];
2535 s->bdsp.clear_blocks(s->block[0]);
2536 mb_pos = s->mb_x + s->mb_y * s->mb_width;
2537 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
2538 s->current_picture.qscale_table[mb_pos] = v->pq;
2539 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
2540 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
2542 // do actual MB decoding and displaying
2543 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2544 v->s.ac_pred = get_bits1(&v->s.gb);
2546 for (k = 0; k < 6; k++) {
2547 val = ((cbp >> (5 - k)) & 1);
2550 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2554 cbp |= val << (5 - k);
2556 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);
2558 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
2560 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);
2561 if (v->pq >= 9 && v->overlap) {
2563 for (j = 0; j < 64; j++)
2564 s->block[k][j] <<= 1;
2565 s->idsp.put_signed_pixels_clamped(s->block[k], dst[k],
2566 k & 4 ? s->uvlinesize
2570 for (j = 0; j < 64; j++)
2571 s->block[k][j] = (s->block[k][j] - 64) << 1;
2572 s->idsp.put_pixels_clamped(s->block[k], dst[k],
2573 k & 4 ? s->uvlinesize
2578 if (v->pq >= 9 && v->overlap) {
2580 v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);
2581 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
2582 if (!(s->flags & CODEC_FLAG_GRAY)) {
2583 v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
2584 v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
2587 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
2588 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
2589 if (!s->first_slice_line) {
2590 v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);
2591 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
2592 if (!(s->flags & CODEC_FLAG_GRAY)) {
2593 v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
2594 v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
2597 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
2598 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
2600 if (v->s.loop_filter)
2601 ff_vc1_loop_filter_iblk(v, v->pq);
2603 if (get_bits_count(&s->gb) > v->bits) {
2604 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
2605 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2606 get_bits_count(&s->gb), v->bits);
2610 if (!v->s.loop_filter)
2611 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2613 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2615 s->first_slice_line = 0;
2617 if (v->s.loop_filter)
2618 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2620 /* This is intentionally mb_height and not end_mb_y - unlike in advanced
2621 * profile, these only differ are when decoding MSS2 rectangles. */
2622 ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
2625 /** Decode blocks of I-frame for advanced profile
2627 static void vc1_decode_i_blocks_adv(VC1Context *v)
2630 MpegEncContext *s = &v->s;
2636 GetBitContext *gb = &s->gb;
2638 /* select codingmode used for VLC tables selection */
2639 switch (v->y_ac_table_index) {
2641 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2644 v->codingset = CS_HIGH_MOT_INTRA;
2647 v->codingset = CS_MID_RATE_INTRA;
2651 switch (v->c_ac_table_index) {
2653 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2656 v->codingset2 = CS_HIGH_MOT_INTER;
2659 v->codingset2 = CS_MID_RATE_INTER;
2664 s->mb_x = s->mb_y = 0;
2666 s->first_slice_line = 1;
2667 s->mb_y = s->start_mb_y;
2668 if (s->start_mb_y) {
2670 init_block_index(v);
2671 memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
2672 (1 + s->b8_stride) * sizeof(*s->coded_block));
2674 for (; s->mb_y < s->end_mb_y; s->mb_y++) {
2676 init_block_index(v);
2677 for (;s->mb_x < s->mb_width; s->mb_x++) {
2678 int16_t (*block)[64] = v->block[v->cur_blk_idx];
2679 ff_update_block_index(s);
2680 s->bdsp.clear_blocks(block[0]);
2681 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2682 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
2683 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
2684 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
2686 // do actual MB decoding and displaying
2687 if (v->fieldtx_is_raw)
2688 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
2689 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
2690 if ( v->acpred_is_raw)
2691 v->s.ac_pred = get_bits1(&v->s.gb);
2693 v->s.ac_pred = v->acpred_plane[mb_pos];
2695 if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
2696 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
2700 s->current_picture.qscale_table[mb_pos] = mquant;
2701 /* Set DC scale - y and c use the same */
2702 s->y_dc_scale = s->y_dc_scale_table[mquant];
2703 s->c_dc_scale = s->c_dc_scale_table[mquant];
2705 for (k = 0; k < 6; k++) {
2706 val = ((cbp >> (5 - k)) & 1);
2709 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
2713 cbp |= val << (5 - k);
2715 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
2716 v->c_avail = !!s->mb_x || (k == 1 || k == 3);
2718 vc1_decode_i_block_adv(v, block[k], k, val,
2719 (k < 4) ? v->codingset : v->codingset2, mquant);
2721 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
2723 v->vc1dsp.vc1_inv_trans_8x8(block[k]);
2726 ff_vc1_smooth_overlap_filter_iblk(v);
2727 vc1_put_signed_blocks_clamped(v);
2728 if (v->s.loop_filter)
2729 ff_vc1_loop_filter_iblk_delayed(v, v->pq);
2731 if (get_bits_count(&s->gb) > v->bits) {
2732 // TODO: may need modification to handle slice coding
2733 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2734 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
2735 get_bits_count(&s->gb), v->bits);
2739 if (!v->s.loop_filter)
2740 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2742 ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
2743 s->first_slice_line = 0;
2746 /* raw bottom MB row */
2748 init_block_index(v);
2749 for (; s->mb_x < s->mb_width; s->mb_x++) {
2750 ff_update_block_index(s);
2751 vc1_put_signed_blocks_clamped(v);
2752 if (v->s.loop_filter)
2753 ff_vc1_loop_filter_iblk_delayed(v, v->pq);
2755 if (v->s.loop_filter)
2756 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2757 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2758 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2761 static void vc1_decode_p_blocks(VC1Context *v)
2763 MpegEncContext *s = &v->s;
2764 int apply_loop_filter;
2766 /* select codingmode used for VLC tables selection */
2767 switch (v->c_ac_table_index) {
2769 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2772 v->codingset = CS_HIGH_MOT_INTRA;
2775 v->codingset = CS_MID_RATE_INTRA;
2779 switch (v->c_ac_table_index) {
2781 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2784 v->codingset2 = CS_HIGH_MOT_INTER;
2787 v->codingset2 = CS_MID_RATE_INTER;
2791 apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&
2792 v->fcm == PROGRESSIVE;
2793 s->first_slice_line = 1;
2794 memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);
2795 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2797 init_block_index(v);
2798 for (; s->mb_x < s->mb_width; s->mb_x++) {
2799 ff_update_block_index(s);
2801 if (v->fcm == ILACE_FIELD)
2802 vc1_decode_p_mb_intfi(v);
2803 else if (v->fcm == ILACE_FRAME)
2804 vc1_decode_p_mb_intfr(v);
2805 else vc1_decode_p_mb(v);
2806 if (s->mb_y != s->start_mb_y && apply_loop_filter)
2807 ff_vc1_apply_p_loop_filter(v);
2808 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2809 // TODO: may need modification to handle slice coding
2810 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2811 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2812 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2816 memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0]) * s->mb_stride);
2817 memmove(v->ttblk_base, v->ttblk, sizeof(v->ttblk_base[0]) * s->mb_stride);
2818 memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
2819 memmove(v->luma_mv_base, v->luma_mv, sizeof(v->luma_mv_base[0]) * s->mb_stride);
2820 if (s->mb_y != s->start_mb_y)
2821 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2822 s->first_slice_line = 0;
2824 if (apply_loop_filter) {
2826 init_block_index(v);
2827 for (; s->mb_x < s->mb_width; s->mb_x++) {
2828 ff_update_block_index(s);
2829 ff_vc1_apply_p_loop_filter(v);
2832 if (s->end_mb_y >= s->start_mb_y)
2833 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2834 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2835 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2838 static void vc1_decode_b_blocks(VC1Context *v)
2840 MpegEncContext *s = &v->s;
2842 /* select codingmode used for VLC tables selection */
2843 switch (v->c_ac_table_index) {
2845 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
2848 v->codingset = CS_HIGH_MOT_INTRA;
2851 v->codingset = CS_MID_RATE_INTRA;
2855 switch (v->c_ac_table_index) {
2857 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
2860 v->codingset2 = CS_HIGH_MOT_INTER;
2863 v->codingset2 = CS_MID_RATE_INTER;
2867 s->first_slice_line = 1;
2868 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2870 init_block_index(v);
2871 for (; s->mb_x < s->mb_width; s->mb_x++) {
2872 ff_update_block_index(s);
2874 if (v->fcm == ILACE_FIELD)
2875 vc1_decode_b_mb_intfi(v);
2876 else if (v->fcm == ILACE_FRAME)
2877 vc1_decode_b_mb_intfr(v);
2880 if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
2881 // TODO: may need modification to handle slice coding
2882 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
2883 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
2884 get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
2887 if (v->s.loop_filter)
2888 ff_vc1_loop_filter_iblk(v, v->pq);
2890 if (!v->s.loop_filter)
2891 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2893 ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
2894 s->first_slice_line = 0;
2896 if (v->s.loop_filter)
2897 ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
2898 ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
2899 (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
2902 static void vc1_decode_skip_blocks(VC1Context *v)
2904 MpegEncContext *s = &v->s;
2906 if (!v->s.last_picture.f->data[0])
2909 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
2910 s->first_slice_line = 1;
2911 for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
2913 init_block_index(v);
2914 ff_update_block_index(s);
2915 memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
2916 memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2917 memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
2918 ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
2919 s->first_slice_line = 0;
2921 s->pict_type = AV_PICTURE_TYPE_P;
2924 void ff_vc1_decode_blocks(VC1Context *v)
2927 v->s.esc3_level_length = 0;
2929 ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);
2932 v->left_blk_idx = -1;
2933 v->topleft_blk_idx = 1;
2935 switch (v->s.pict_type) {
2936 case AV_PICTURE_TYPE_I:
2937 if (v->profile == PROFILE_ADVANCED)
2938 vc1_decode_i_blocks_adv(v);
2940 vc1_decode_i_blocks(v);
2942 case AV_PICTURE_TYPE_P:
2943 if (v->p_frame_skipped)
2944 vc1_decode_skip_blocks(v);
2946 vc1_decode_p_blocks(v);
2948 case AV_PICTURE_TYPE_B:
2950 if (v->profile == PROFILE_ADVANCED)
2951 vc1_decode_i_blocks_adv(v);
2953 vc1_decode_i_blocks(v);
2955 vc1_decode_b_blocks(v);