FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vc1_block.c
Date: 2024-04-19 17:50:32
Exec Total Coverage
Lines: 1824 1928 94.6%
Functions: 25 25 100.0%
Branches: 1613 2184 73.9%

Line Branch Exec Source
1 /*
2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2011 Mashiat Sarker Shakkhar
4 * Copyright (c) 2006-2007 Konstantin Shishkov
5 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * VC-1 and WMV3 block decoding routines
27 */
28
29 #include "avcodec.h"
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "mpegvideodec.h"
33 #include "msmpeg4_vc1_data.h"
34 #include "unary.h"
35 #include "vc1.h"
36 #include "vc1_pred.h"
37 #include "vc1acdata.h"
38 #include "vc1data.h"
39
40 // offset tables for interlaced picture MVDATA decoding
41 static const uint8_t offset_table[2][9] = {
42 { 0, 1, 2, 4, 8, 16, 32, 64, 128 },
43 { 0, 1, 3, 7, 15, 31, 63, 127, 255 },
44 };
45
46 // mapping table for internal block representation
47 static const int block_map[6] = {0, 2, 1, 3, 4, 5};
48
49 /***********************************************************************/
50 /**
51 * @name VC-1 Bitplane decoding
52 * @see 8.7, p56
53 * @{
54 */
55
56
57 10084 static inline void init_block_index(VC1Context *v)
58 {
59 10084 MpegEncContext *s = &v->s;
60 10084 ff_init_block_index(s);
61
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10084 if (v->field_mode && !(v->second_field ^ v->tff)) {
62 669 s->dest[0] += s->current_picture_ptr->f->linesize[0];
63 669 s->dest[1] += s->current_picture_ptr->f->linesize[1];
64 669 s->dest[2] += s->current_picture_ptr->f->linesize[2];
65 }
66 10084 }
67
68 356913 static inline void update_block_index(MpegEncContext *s)
69 {
70 /* VC1 is always 420 except when using AV_CODEC_FLAG_GRAY
71 * (or a HWAccel). Shall we inline this value? */
72 356913 ff_update_block_index(s, 8, 0, s->chroma_x_shift);
73 356913 }
74
75 /** @} */ //Bitplane group
76
77 250176 static void vc1_put_blocks_clamped(VC1Context *v, int put_signed)
78 {
79 250176 MpegEncContext *s = &v->s;
80 uint8_t *dest;
81 250176 int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
82 250176 int fieldtx = 0;
83 int i;
84
85 /* The put pixels loop is one MB row and one MB column behind the decoding
86 * loop because we can only put pixels when overlap filtering is done. For
87 * interlaced frame pictures, however, the put pixels loop is only one
88 * column behind the decoding loop as interlaced frame pictures only need
89 * horizontal overlap filtering. */
90
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250176 if (!s->first_slice_line && v->fcm != ILACE_FRAME) {
91
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179816 if (s->mb_x) {
92
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1220548 for (i = 0; i < block_count; i++) {
93
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1743640 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i] - 1] :
94 697456 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i] - 2]) {
95 294013 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + ((i & 1) - 2) * 8;
96
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294013 if (put_signed)
97
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256143 s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
98 63146 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
99 i > 3 ? s->uvlinesize : s->linesize);
100 else
101
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134688 s->idsp.put_pixels_clamped(v->block[v->topleft_blk_idx][block_map[i]],
102 33672 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize - 8 : dest,
103 i > 3 ? s->uvlinesize : s->linesize);
104 }
105 }
106 }
107
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179816 if (s->mb_x == v->end_mb_x - 1) {
108
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38157 for (i = 0; i < block_count; i++) {
109
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54510 if (i > 3 ? v->mb_type[0][s->block_index[i] - s->block_wrap[i]] :
110 21804 v->mb_type[0][s->block_index[i] - 2 * s->block_wrap[i]]) {
111 11193 dest = s->dest[0] + ((i & 2) - 4) * 4 * s->linesize + (i & 1) * 8;
112
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11193 if (put_signed)
113
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7475 s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
114 1826 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
115 i > 3 ? s->uvlinesize : s->linesize);
116 else
117
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7392 s->idsp.put_pixels_clamped(v->block[v->top_blk_idx][block_map[i]],
118 1848 i > 3 ? s->dest[i - 3] - 8 * s->uvlinesize : dest,
119 i > 3 ? s->uvlinesize : s->linesize);
120 }
121 }
122 }
123 }
124
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250176 if (s->mb_y == s->end_mb_y - 1 || v->fcm == ILACE_FRAME) {
125
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70340 if (s->mb_x) {
126
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69038 if (v->fcm == ILACE_FRAME)
127 32368 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x - 1];
128
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483266 for (i = 0; i < block_count; i++) {
129
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690380 if (i > 3 ? v->mb_type[0][s->block_index[i] - 1] :
130 276152 v->mb_type[0][s->block_index[i] - 2]) {
131
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185719 if (fieldtx)
132 34086 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + ((i & 1) - 2) * 8;
133 else
134 151633 dest = s->dest[0] + (i & 2) * 4 * s->linesize + ((i & 1) - 2) * 8;
135
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185719 if (put_signed)
136
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356438 s->idsp.put_signed_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
137 58766 i > 3 ? s->dest[i - 3] - 8 : dest,
138 119453 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
139 else
140
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15000 s->idsp.put_pixels_clamped(v->block[v->left_blk_idx][block_map[i]],
141 2500 i > 3 ? s->dest[i - 3] - 8 : dest,
142 5000 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
143 }
144 }
145 }
146
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70340 if (s->mb_x == v->end_mb_x - 1) {
147
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1302 if (v->fcm == ILACE_FRAME)
148 272 fieldtx = v->fieldtx_plane[s->mb_y * s->mb_stride + s->mb_x];
149
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9114 for (i = 0; i < block_count; i++) {
150
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7812 if (v->mb_type[0][s->block_index[i]]) {
151
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3359 if (fieldtx)
152 252 dest = s->dest[0] + ((i & 2) >> 1) * s->linesize + (i & 1) * 8;
153 else
154 3107 dest = s->dest[0] + (i & 2) * 4 * s->linesize + (i & 1) * 8;
155
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3359 if (put_signed)
156
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5638 s->idsp.put_signed_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
157 926 i > 3 ? s->dest[i - 3] : dest,
158 1893 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
159 else
160
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1080 s->idsp.put_pixels_clamped(v->block[v->cur_blk_idx][block_map[i]],
161 180 i > 3 ? s->dest[i - 3] : dest,
162 360 i > 3 ? s->uvlinesize : s->linesize << fieldtx);
163 }
164 }
165 }
166 }
167 250176 }
168
169 #define inc_blk_idx(idx) do { \
170 idx++; \
171 if (idx >= v->n_allocated_blks) \
172 idx = 0; \
173 } while (0)
174
175 /***********************************************************************/
176 /**
177 * @name VC-1 Block-level functions
178 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
179 * @{
180 */
181
182 /**
183 * @def GET_MQUANT
184 * @brief Get macroblock-level quantizer scale
185 */
186 #define GET_MQUANT() \
187 if (v->dquantfrm) { \
188 int edges = 0; \
189 if (v->dqprofile == DQPROFILE_ALL_MBS) { \
190 if (v->dqbilevel) { \
191 mquant = (get_bits1(gb)) ? -v->altpq : v->pq; \
192 } else { \
193 mqdiff = get_bits(gb, 3); \
194 if (mqdiff != 7) \
195 mquant = -v->pq - mqdiff; \
196 else \
197 mquant = -get_bits(gb, 5); \
198 } \
199 } \
200 if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
201 edges = 1 << v->dqsbedge; \
202 else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
203 edges = (3 << v->dqsbedge) % 15; \
204 else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
205 edges = 15; \
206 if ((edges&1) && !s->mb_x) \
207 mquant = -v->altpq; \
208 if ((edges&2) && !s->mb_y) \
209 mquant = -v->altpq; \
210 if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
211 mquant = -v->altpq; \
212 if ((edges&8) && \
213 s->mb_y == ((s->mb_height >> v->field_mode) - 1)) \
214 mquant = -v->altpq; \
215 if (!mquant || mquant > 31 || mquant < -31) { \
216 av_log(v->s.avctx, AV_LOG_ERROR, \
217 "Overriding invalid mquant %d\n", mquant); \
218 mquant = 1; \
219 } \
220 }
221
222 /**
223 * @def GET_MVDATA(_dmv_x, _dmv_y)
224 * @brief Get MV differentials
225 * @see MVDATA decoding from 8.3.5.2, p(1)20
226 * @param _dmv_x Horizontal differential for decoded MV
227 * @param _dmv_y Vertical differential for decoded MV
228 */
229 #define GET_MVDATA(_dmv_x, _dmv_y) \
230 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index], \
231 VC1_MV_DIFF_VLC_BITS, 2); \
232 if (index > 36) { \
233 mb_has_coeffs = 1; \
234 index -= 37; \
235 } else \
236 mb_has_coeffs = 0; \
237 s->mb_intra = 0; \
238 if (!index) { \
239 _dmv_x = _dmv_y = 0; \
240 } else if (index == 35) { \
241 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
242 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
243 } else if (index == 36) { \
244 _dmv_x = 0; \
245 _dmv_y = 0; \
246 s->mb_intra = 1; \
247 } else { \
248 index1 = index % 6; \
249 _dmv_x = offset_table[1][index1]; \
250 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
251 if (val > 0) { \
252 val = get_bits(gb, val); \
253 sign = 0 - (val & 1); \
254 _dmv_x = (sign ^ ((val >> 1) + _dmv_x)) - sign; \
255 } \
256 \
257 index1 = index / 6; \
258 _dmv_y = offset_table[1][index1]; \
259 val = size_table[index1] - (!s->quarter_sample && index1 == 5); \
260 if (val > 0) { \
261 val = get_bits(gb, val); \
262 sign = 0 - (val & 1); \
263 _dmv_y = (sign ^ ((val >> 1) + _dmv_y)) - sign; \
264 } \
265 }
266
267 119188 static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
268 int *dmv_y, int *pred_flag)
269 {
270 int index, index1;
271 int extend_x, extend_y;
272 119188 GetBitContext *gb = &v->s.gb;
273 int bits, esc;
274 int val, sign;
275
276
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119188 if (v->numref) {
277 59405 bits = VC1_2REF_MVDATA_VLC_BITS;
278 59405 esc = 125;
279 } else {
280 59783 bits = VC1_1REF_MVDATA_VLC_BITS;
281 59783 esc = 71;
282 }
283 119188 extend_x = v->dmvrange & 1;
284 119188 extend_y = (v->dmvrange >> 1) & 1;
285 119188 index = get_vlc2(gb, v->imv_vlc, bits, 3);
286
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119188 if (index == esc) {
287 8896 *dmv_x = get_bits(gb, v->k_x);
288 8896 *dmv_y = get_bits(gb, v->k_y);
289
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8896 if (v->numref) {
290
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414 if (pred_flag)
291 414 *pred_flag = *dmv_y & 1;
292 414 *dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
293 }
294 }
295 else {
296
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110292 av_assert0(index < esc);
297 110292 index1 = (index + 1) % 9;
298
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110292 if (index1 != 0) {
299 84924 val = get_bits(gb, index1 + extend_x);
300 84924 sign = 0 - (val & 1);
301 84924 *dmv_x = (sign ^ ((val >> 1) + offset_table[extend_x][index1])) - sign;
302 } else
303 25368 *dmv_x = 0;
304 110292 index1 = (index + 1) / 9;
305
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110292 if (index1 > v->numref) {
306 76909 val = get_bits(gb, (index1 >> v->numref) + extend_y);
307 76909 sign = 0 - (val & 1);
308 76909 *dmv_y = (sign ^ ((val >> 1) + offset_table[extend_y][index1 >> v->numref])) - sign;
309 } else
310 33383 *dmv_y = 0;
311
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110292 if (v->numref && pred_flag)
312 58991 *pred_flag = index1 & 1;
313 }
314 119188 }
315
316 /** Reconstruct motion vector for B-frame and do motion compensation
317 */
318 62854 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
319 int direct, int mode)
320 {
321
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62854 if (direct) {
322 9339 ff_vc1_mc_1mv(v, 0);
323 9339 ff_vc1_interp_mc(v);
324 9339 return;
325 }
326
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53515 if (mode == BMV_TYPE_INTERPOLATED) {
327 12043 ff_vc1_mc_1mv(v, 0);
328 12043 ff_vc1_interp_mc(v);
329 12043 return;
330 }
331
332 41472 ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
333 }
334
335 /** Get predicted DC value for I-frames only
336 * prediction dir: left=0, top=1
337 * @param s MpegEncContext
338 * @param overlap flag indicating that overlap filtering is used
339 * @param pq integer part of picture quantizer
340 * @param[in] n block index in the current MB
341 * @param dc_val_ptr Pointer to DC predictor
342 * @param dir_ptr Prediction direction for use in AC prediction
343 */
344 114600 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
345 int16_t **dc_val_ptr, int *dir_ptr)
346 {
347 int a, b, c, wrap, pred, scale;
348 int16_t *dc_val;
349 static const uint16_t dcpred[32] = {
350 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
351 114, 102, 93, 85, 79, 73, 68, 64,
352 60, 57, 54, 51, 49, 47, 45, 43,
353 41, 39, 38, 37, 35, 34, 33
354 };
355
356 /* find prediction - wmv3_dc_scale always used here in fact */
357
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114600 if (n < 4) scale = s->y_dc_scale;
358 38200 else scale = s->c_dc_scale;
359
360 114600 wrap = s->block_wrap[n];
361 114600 dc_val = s->dc_val[0] + s->block_index[n];
362
363 /* B A
364 * C X
365 */
366 114600 c = dc_val[ - 1];
367 114600 b = dc_val[ - 1 - wrap];
368 114600 a = dc_val[ - wrap];
369
370
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114600 if (pq < 9 || !overlap) {
371 /* Set outer values */
372
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114600 if (s->first_slice_line && (n != 2 && n != 3))
373 5360 b = a = dcpred[scale];
374
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114600 if (s->mb_x == 0 && (n != 1 && n != 3))
375 4056 b = c = dcpred[scale];
376 } else {
377 /* Set outer values */
378 if (s->first_slice_line && (n != 2 && n != 3))
379 b = a = 0;
380 if (s->mb_x == 0 && (n != 1 && n != 3))
381 b = c = 0;
382 }
383
384
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114600 if (abs(a - b) <= abs(b - c)) {
385 77612 pred = c;
386 77612 *dir_ptr = 1; // left
387 } else {
388 36988 pred = a;
389 36988 *dir_ptr = 0; // top
390 }
391
392 /* update predictor */
393 114600 *dc_val_ptr = &dc_val[0];
394 114600 return pred;
395 }
396
397
398 /** Get predicted DC value
399 * prediction dir: left=0, top=1
400 * @param s MpegEncContext
401 * @param overlap flag indicating that overlap filtering is used
402 * @param pq integer part of picture quantizer
403 * @param[in] n block index in the current MB
404 * @param a_avail flag indicating top block availability
405 * @param c_avail flag indicating left block availability
406 * @param dc_val_ptr Pointer to DC predictor
407 * @param dir_ptr Prediction direction for use in AC prediction
408 */
409 381610 static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
410 int a_avail, int c_avail,
411 int16_t **dc_val_ptr, int *dir_ptr)
412 {
413 int a, b, c, wrap, pred;
414 int16_t *dc_val;
415 381610 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
416 381610 int q1, q2 = 0;
417 int dqscale_index;
418
419 /* scale predictors if needed */
420 381610 q1 = FFABS(s->current_picture.qscale_table[mb_pos]);
421 381610 dqscale_index = s->y_dc_scale_table[q1] - 1;
422
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381610 if (dqscale_index < 0)
423 return 0;
424
425 381610 wrap = s->block_wrap[n];
426 381610 dc_val = s->dc_val[0] + s->block_index[n];
427
428 /* B A
429 * C X
430 */
431 381610 c = dc_val[ - 1];
432 381610 b = dc_val[ - 1 - wrap];
433 381610 a = dc_val[ - wrap];
434
435
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381610 if (c_avail && (n != 1 && n != 3)) {
436 161716 q2 = FFABS(s->current_picture.qscale_table[mb_pos - 1]);
437
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161716 if (q2 && q2 != q1)
438 10876 c = (int)((unsigned)c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
439 }
440
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381610 if (a_avail && (n != 2 && n != 3)) {
441 141745 q2 = FFABS(s->current_picture.qscale_table[mb_pos - s->mb_stride]);
442
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141745 if (q2 && q2 != q1)
443 10104 a = (int)((unsigned)a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
444 }
445
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381610 if (a_avail && c_avail && (n != 3)) {
446 163754 int off = mb_pos;
447
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163754 if (n != 1)
448 128389 off--;
449
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163754 if (n != 2)
450 123403 off -= s->mb_stride;
451 163754 q2 = FFABS(s->current_picture.qscale_table[off]);
452
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163754 if (q2 && q2 != q1)
453 13633 b = (int)((unsigned)b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
454 }
455
456
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381610 if (c_avail && (!a_avail || abs(a - b) <= abs(b - c))) {
457 209868 pred = c;
458 209868 *dir_ptr = 1; // left
459
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171742 } else if (a_avail) {
460 118293 pred = a;
461 118293 *dir_ptr = 0; // top
462 } else {
463 53449 pred = 0;
464 53449 *dir_ptr = 1; // left
465 }
466
467 /* update predictor */
468 381610 *dc_val_ptr = &dc_val[0];
469 381610 return pred;
470 }
471
472 /** @} */ // Block group
473
474 /**
475 * @name VC1 Macroblock-level functions in Simple/Main Profiles
476 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
477 * @{
478 */
479
480 173312 static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
481 uint8_t **coded_block_ptr)
482 {
483 int xy, wrap, pred, a, b, c;
484
485 173312 xy = s->block_index[n];
486 173312 wrap = s->b8_stride;
487
488 /* B C
489 * A X
490 */
491 173312 a = s->coded_block[xy - 1 ];
492 173312 b = s->coded_block[xy - 1 - wrap];
493 173312 c = s->coded_block[xy - wrap];
494
495
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173312 if (b == c) {
496 157230 pred = a;
497 } else {
498 16082 pred = c;
499 }
500
501 /* store value */
502 173312 *coded_block_ptr = &s->coded_block[xy];
503
504 173312 return pred;
505 }
506
507 /**
508 * Decode one AC coefficient
509 * @param v The VC1 context
510 * @param last Last coefficient
511 * @param skip How much zero coefficients to skip
512 * @param value Decoded AC coefficient value
513 * @param codingset set of VLC to decode data
514 * @see 8.1.3.4
515 */
516 8423957 static int vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
517 int *value, int codingset)
518 {
519 8423957 GetBitContext *gb = &v->s.gb;
520 int index, run, level, lst, sign;
521
522 8423957 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset], AC_VLC_BITS, 3);
523
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8423957 if (index < 0)
524 return index;
525
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8423957 if (index != ff_vc1_ac_sizes[codingset] - 1) {
526 8351956 run = vc1_index_decode_table[codingset][index][0];
527 8351956 level = vc1_index_decode_table[codingset][index][1];
528
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8351956 lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
529 8351956 sign = get_bits1(gb);
530 } else {
531 72001 int escape = decode210(gb);
532
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72001 if (escape != 2) {
533 62172 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset], AC_VLC_BITS, 3);
534
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62172 if (index >= ff_vc1_ac_sizes[codingset] - 1U)
535 return AVERROR_INVALIDDATA;
536 62172 run = vc1_index_decode_table[codingset][index][0];
537 62172 level = vc1_index_decode_table[codingset][index][1];
538 62172 lst = index >= vc1_last_decode_table[codingset];
539
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62172 if (escape == 0) {
540
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31204 if (lst)
541 12124 level += vc1_last_delta_level_table[codingset][run];
542 else
543 19080 level += vc1_delta_level_table[codingset][run];
544 } else {
545
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30968 if (lst)
546 11240 run += vc1_last_delta_run_table[codingset][level] + 1;
547 else
548 19728 run += vc1_delta_run_table[codingset][level] + 1;
549 }
550 62172 sign = get_bits1(gb);
551 } else {
552 9829 lst = get_bits1(gb);
553
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9829 if (v->s.esc3_level_length == 0) {
554
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389 if (v->pq < 8 || v->dquantfrm) { // table 59
555 331 v->s.esc3_level_length = get_bits(gb, 3);
556
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331 if (!v->s.esc3_level_length)
557 24 v->s.esc3_level_length = get_bits(gb, 2) + 8;
558 } else { // table 60
559 58 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
560 }
561 389 v->s.esc3_run_length = 3 + get_bits(gb, 2);
562 }
563 9829 run = get_bits(gb, v->s.esc3_run_length);
564 9829 sign = get_bits1(gb);
565 9829 level = get_bits(gb, v->s.esc3_level_length);
566 }
567 }
568
569 8423957 *last = lst;
570 8423957 *skip = run;
571 8423957 *value = (level ^ -sign) + sign;
572
573 8423957 return 0;
574 }
575
576 /** Decode intra block in intra frames - should be faster than decode_intra_block
577 * @param v VC1Context
578 * @param block block to decode
579 * @param[in] n subblock index
580 * @param coded are AC coeffs present or not
581 * @param codingset set of VLC to decode data
582 */
583 114600 static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
584 int coded, int codingset)
585 {
586 114600 GetBitContext *gb = &v->s.gb;
587 114600 MpegEncContext *s = &v->s;
588 114600 int dc_pred_dir = 0; /* Direction of the DC prediction used */
589 int i;
590 int16_t *dc_val;
591 int16_t *ac_val, *ac_val2;
592 int dcdiff, scale;
593
594 /* Get DC differential */
595 114600 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
596 MSMP4_DC_VLC_BITS, 3);
597
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114600 if (dcdiff) {
598
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84375 const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
599
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84375 if (dcdiff == 119 /* ESC index value */) {
600 2 dcdiff = get_bits(gb, 8 + m);
601 } else {
602
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84373 if (m)
603 31164 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
604 }
605
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84375 if (get_bits1(gb))
606 43828 dcdiff = -dcdiff;
607 }
608
609 /* Prediction */
610 114600 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
611 114600 *dc_val = dcdiff;
612
613 /* Store the quantized DC coeff, used for prediction */
614
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114600 if (n < 4)
615 76400 scale = s->y_dc_scale;
616 else
617 38200 scale = s->c_dc_scale;
618 114600 block[0] = dcdiff * scale;
619
620 114600 ac_val = s->ac_val[0][s->block_index[n]];
621 114600 ac_val2 = ac_val;
622
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114600 if (dc_pred_dir) // left
623 77612 ac_val -= 16;
624 else // top
625 36988 ac_val -= 16 * s->block_wrap[n];
626
627 114600 scale = v->pq * 2 + v->halfpq;
628
629 //AC Decoding
630 114600 i = !!coded;
631
632
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114600 if (coded) {
633 60031 int last = 0, skip, value;
634 const uint8_t *zz_table;
635 int k;
636
637
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60031 if (v->s.ac_pred) {
638
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14906 if (!dc_pred_dir)
639 5075 zz_table = v->zz_8x8[2];
640 else
641 9831 zz_table = v->zz_8x8[3];
642 } else
643 45125 zz_table = v->zz_8x8[1];
644
645
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1000331 while (!last) {
646 940300 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
647
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940300 if (ret < 0)
648 return ret;
649 940300 i += skip;
650
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940300 if (i > 63)
651 break;
652 940300 block[zz_table[i++]] = value;
653 }
654
655 /* apply AC prediction if needed */
656
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60031 if (s->ac_pred) {
657 int sh;
658
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14906 if (dc_pred_dir) { // left
659 9831 sh = v->left_blk_sh;
660 } else { // top
661 5075 sh = v->top_blk_sh;
662 5075 ac_val += 8;
663 }
664
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119248 for (k = 1; k < 8; k++)
665 104342 block[k << sh] += ac_val[k];
666 }
667 /* save AC coeffs for further prediction */
668
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480248 for (k = 1; k < 8; k++) {
669 420217 ac_val2[k] = block[k << v->left_blk_sh];
670 420217 ac_val2[k + 8] = block[k << v->top_blk_sh];
671 }
672
673 /* scale AC coeffs */
674
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3841984 for (k = 1; k < 64; k++)
675
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3781953 if (block[k]) {
676 939667 block[k] *= scale;
677
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939667 if (!v->pquantizer)
678
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66540 block[k] += (block[k] < 0) ? -v->pq : v->pq;
679 }
680
681 } else {
682 int k;
683
684 54569 memset(ac_val2, 0, 16 * 2);
685
686 /* apply AC prediction if needed */
687
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54569 if (s->ac_pred) {
688 int sh;
689
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4204 if (dc_pred_dir) { //left
690 3180 sh = v->left_blk_sh;
691 } else { // top
692 1024 sh = v->top_blk_sh;
693 1024 ac_val += 8;
694 1024 ac_val2 += 8;
695 }
696 4204 memcpy(ac_val2, ac_val, 8 * 2);
697
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33632 for (k = 1; k < 8; k++) {
698 29428 block[k << sh] = ac_val[k] * scale;
699
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29428 if (!v->pquantizer && block[k << sh])
700
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590 block[k << sh] += (block[k << sh] < 0) ? -v->pq : v->pq;
701 }
702 }
703 }
704
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114600 if (s->ac_pred) i = 63;
705 114600 s->block_last_index[n] = i;
706
707 114600 return 0;
708 }
709
710 /** Decode intra block in intra frames - should be faster than decode_intra_block
711 * @param v VC1Context
712 * @param block block to decode
713 * @param[in] n subblock number
714 * @param coded are AC coeffs present or not
715 * @param codingset set of VLC to decode data
716 * @param mquant quantizer value for this macroblock
717 */
718 145368 static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
719 int coded, int codingset, int mquant)
720 {
721 145368 GetBitContext *gb = &v->s.gb;
722 145368 MpegEncContext *s = &v->s;
723 145368 int dc_pred_dir = 0; /* Direction of the DC prediction used */
724 int i;
725 145368 int16_t *dc_val = NULL;
726 int16_t *ac_val, *ac_val2;
727 int dcdiff;
728 145368 int a_avail = v->a_avail, c_avail = v->c_avail;
729 145368 int use_pred = s->ac_pred;
730 int scale;
731 145368 int q1, q2 = 0;
732 145368 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
733 145368 int quant = FFABS(mquant);
734
735 /* Get DC differential */
736 145368 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
737 MSMP4_DC_VLC_BITS, 3);
738
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145368 if (dcdiff) {
739
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100398 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
740
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100398 if (dcdiff == 119 /* ESC index value */) {
741 2 dcdiff = get_bits(gb, 8 + m);
742 } else {
743
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100396 if (m)
744 13090 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
745 }
746
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100398 if (get_bits1(gb))
747 51735 dcdiff = -dcdiff;
748 }
749
750 /* Prediction */
751 145368 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
752 145368 *dc_val = dcdiff;
753
754 /* Store the quantized DC coeff, used for prediction */
755
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145368 if (n < 4)
756 96912 scale = s->y_dc_scale;
757 else
758 48456 scale = s->c_dc_scale;
759 145368 block[0] = dcdiff * scale;
760
761 /* check if AC is needed at all */
762
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145368 if (!a_avail && !c_avail)
763 84 use_pred = 0;
764
765
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145368 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
766
767 145368 ac_val = s->ac_val[0][s->block_index[n]];
768 145368 ac_val2 = ac_val;
769
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145368 if (dc_pred_dir) // left
770 96277 ac_val -= 16;
771 else // top
772 49091 ac_val -= 16 * s->block_wrap[n];
773
774 145368 q1 = s->current_picture.qscale_table[mb_pos];
775
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145368 if (n == 3)
776 24228 q2 = q1;
777
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121140 else if (dc_pred_dir) {
778
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81287 if (n == 1)
779 16438 q2 = q1;
780
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64849 else if (c_avail && mb_pos)
781 64765 q2 = s->current_picture.qscale_table[mb_pos - 1];
782 } else {
783
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39853 if (n == 2)
784 9816 q2 = q1;
785
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30037 else if (a_avail && mb_pos >= s->mb_stride)
786 30037 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
787 }
788
789 //AC Decoding
790 145368 i = 1;
791
792
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145368 if (coded) {
793 131297 int last = 0, skip, value;
794 const uint8_t *zz_table;
795 int k;
796
797
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131297 if (v->s.ac_pred) {
798
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32458 if (!use_pred && v->fcm == ILACE_FRAME) {
799 6 zz_table = v->zzi_8x8;
800 } else {
801
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32452 if (!dc_pred_dir) // top
802 11944 zz_table = v->zz_8x8[2];
803 else // left
804 20508 zz_table = v->zz_8x8[3];
805 }
806 } else {
807
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98839 if (v->fcm != ILACE_FRAME)
808 25079 zz_table = v->zz_8x8[1];
809 else
810 73760 zz_table = v->zzi_8x8;
811 }
812
813
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1693873 while (!last) {
814 1562576 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
815
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1562576 if (ret < 0)
816 return ret;
817 1562576 i += skip;
818
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1562576 if (i > 63)
819 break;
820 1562576 block[zz_table[i++]] = value;
821 }
822
823 /* apply AC prediction if needed */
824
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131297 if (use_pred) {
825 int sh;
826
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32434 if (dc_pred_dir) { // left
827 20490 sh = v->left_blk_sh;
828 } else { // top
829 11944 sh = v->top_blk_sh;
830 11944 ac_val += 8;
831 }
832 /* scale predictors if needed*/
833
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32434 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
834
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32434 if (q1 < 1)
835 return AVERROR_INVALIDDATA;
836
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32434 if (q2)
837
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32434 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
838
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32434 if (q2 && q1 != q2) {
839
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16272 for (k = 1; k < 8; k++)
840 14238 block[k << sh] += (int)(ac_val[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
841 } else {
842
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243200 for (k = 1; k < 8; k++)
843 212800 block[k << sh] += ac_val[k];
844 }
845 }
846 /* save AC coeffs for further prediction */
847
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1050376 for (k = 1; k < 8; k++) {
848 919079 ac_val2[k ] = block[k << v->left_blk_sh];
849 919079 ac_val2[k + 8] = block[k << v->top_blk_sh];
850 }
851
852 /* scale AC coeffs */
853
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8403008 for (k = 1; k < 64; k++)
854
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8271711 if (block[k]) {
855 1560534 block[k] *= scale;
856
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1560534 if (!v->pquantizer)
857 block[k] += (block[k] < 0) ? -quant : quant;
858 }
859
860 } else { // no AC coeffs
861 int k;
862
863 14071 memset(ac_val2, 0, 16 * 2);
864
865 /* apply AC prediction if needed */
866
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14071 if (use_pred) {
867 int sh;
868
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3290 if (dc_pred_dir) { // left
869 2833 sh = v->left_blk_sh;
870 } else { // top
871 457 sh = v->top_blk_sh;
872 457 ac_val += 8;
873 457 ac_val2 += 8;
874 }
875 3290 memcpy(ac_val2, ac_val, 8 * 2);
876
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3290 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
877
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3290 if (q1 < 1)
878 return AVERROR_INVALIDDATA;
879
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3290 if (q2)
880
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3290 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
881
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3290 if (q2 && q1 != q2) {
882
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1680 for (k = 1; k < 8; k++)
883 1470 ac_val2[k] = (int)(ac_val2[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
884 }
885
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26320 for (k = 1; k < 8; k++) {
886 23030 block[k << sh] = ac_val2[k] * scale;
887
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23030 if (!v->pquantizer && block[k << sh])
888 block[k << sh] += (block[k << sh] < 0) ? -quant : quant;
889 }
890 }
891 }
892
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145368 if (use_pred) i = 63;
893 145368 s->block_last_index[n] = i;
894
895 145368 return 0;
896 }
897
898 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
899 * @param v VC1Context
900 * @param block block to decode
901 * @param[in] n subblock index
902 * @param coded are AC coeffs present or not
903 * @param mquant block quantizer
904 * @param codingset set of VLC to decode data
905 */
906 236242 static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
907 int coded, int mquant, int codingset)
908 {
909 236242 GetBitContext *gb = &v->s.gb;
910 236242 MpegEncContext *s = &v->s;
911 236242 int dc_pred_dir = 0; /* Direction of the DC prediction used */
912 int i;
913 236242 int16_t *dc_val = NULL;
914 int16_t *ac_val, *ac_val2;
915 int dcdiff;
916 236242 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
917 236242 int a_avail = v->a_avail, c_avail = v->c_avail;
918 236242 int use_pred = s->ac_pred;
919 int scale;
920 236242 int q1, q2 = 0;
921 236242 int quant = FFABS(mquant);
922
923 236242 s->bdsp.clear_block(block);
924
925 /* XXX: Guard against dumb values of mquant */
926 236242 quant = av_clip_uintp2(quant, 5);
927
928 /* Set DC scale - y and c use the same */
929 236242 s->y_dc_scale = s->y_dc_scale_table[quant];
930 236242 s->c_dc_scale = s->c_dc_scale_table[quant];
931
932 /* Get DC differential */
933 236242 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
934 MSMP4_DC_VLC_BITS, 3);
935
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236242 if (dcdiff) {
936
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190507 const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
937
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190507 if (dcdiff == 119 /* ESC index value */) {
938 3 dcdiff = get_bits(gb, 8 + m);
939 } else {
940
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190504 if (m)
941 18284 dcdiff = (dcdiff << m) + get_bits(gb, m) - ((1 << m) - 1);
942 }
943
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190507 if (get_bits1(gb))
944 106640 dcdiff = -dcdiff;
945 }
946
947 /* Prediction */
948 236242 dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, quant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
949 236242 *dc_val = dcdiff;
950
951 /* Store the quantized DC coeff, used for prediction */
952
953
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236242 if (n < 4) {
954 159392 block[0] = dcdiff * s->y_dc_scale;
955 } else {
956 76850 block[0] = dcdiff * s->c_dc_scale;
957 }
958
959 //AC Decoding
960 236242 i = 1;
961
962 /* check if AC is needed at all and adjust direction if needed */
963
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236242 if (!a_avail) dc_pred_dir = 1;
964
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236242 if (!c_avail) dc_pred_dir = 0;
965
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236242 if (!a_avail && !c_avail) use_pred = 0;
966 236242 ac_val = s->ac_val[0][s->block_index[n]];
967 236242 ac_val2 = ac_val;
968
969
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236242 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
970
971
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236242 if (dc_pred_dir) //left
972 113675 ac_val -= 16;
973 else //top
974 122567 ac_val -= 16 * s->block_wrap[n];
975
976 236242 q1 = s->current_picture.qscale_table[mb_pos];
977
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236242 if (dc_pred_dir && c_avail && mb_pos)
978 113596 q2 = s->current_picture.qscale_table[mb_pos - 1];
979
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236242 if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
980 67664 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
981
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236242 if (dc_pred_dir && n == 1)
982 34090 q2 = q1;
983
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236242 if (!dc_pred_dir && n == 2)
984 28445 q2 = q1;
985
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236242 if (n == 3) q2 = q1;
986
987
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236242 if (coded) {
988 163776 int last = 0, skip, value;
989 int k;
990
991
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1706843 while (!last) {
992 1543069 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
993
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1543069 if (ret < 0)
994 return ret;
995 1543069 i += skip;
996
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1543069 if (i > 63)
997 2 break;
998
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1543067 if (v->fcm == PROGRESSIVE)
999 925417 block[v->zz_8x8[0][i++]] = value;
1000 else {
1001
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617650 if (use_pred && (v->fcm == ILACE_FRAME)) {
1002
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19188 if (!dc_pred_dir) // top
1003 8623 block[v->zz_8x8[2][i++]] = value;
1004 else // left
1005 10565 block[v->zz_8x8[3][i++]] = value;
1006 } else {
1007 598462 block[v->zzi_8x8[i++]] = value;
1008 }
1009 }
1010 }
1011
1012 /* apply AC prediction if needed */
1013
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163776 if (use_pred) {
1014 /* scale predictors if needed*/
1015
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43023 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1016
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43023 if (q1 < 1)
1017 return AVERROR_INVALIDDATA;
1018
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43023 if (q2)
1019
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43023 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1020
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43023 if (q2 && q1 != q2) {
1021
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354 if (dc_pred_dir) { // left
1022
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1880 for (k = 1; k < 8; k++)
1023 1645 block[k << v->left_blk_sh] += (int)(ac_val[k] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1024 } else { //top
1025
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952 for (k = 1; k < 8; k++)
1026 833 block[k << v->top_blk_sh] += (int)(ac_val[k + 8] * q2 * (unsigned)ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1027 }
1028 } else {
1029
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42669 if (dc_pred_dir) { // left
1030
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205240 for (k = 1; k < 8; k++)
1031 179585 block[k << v->left_blk_sh] += ac_val[k];
1032 } else { // top
1033
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136112 for (k = 1; k < 8; k++)
1034 119098 block[k << v->top_blk_sh] += ac_val[k + 8];
1035 }
1036 }
1037 }
1038 /* save AC coeffs for further prediction */
1039
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1310208 for (k = 1; k < 8; k++) {
1040 1146432 ac_val2[k ] = block[k << v->left_blk_sh];
1041 1146432 ac_val2[k + 8] = block[k << v->top_blk_sh];
1042 }
1043
1044 /* scale AC coeffs */
1045
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10481664 for (k = 1; k < 64; k++)
1046
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10317888 if (block[k]) {
1047 1546034 block[k] *= scale;
1048
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1546034 if (!v->pquantizer)
1049
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28424 block[k] += (block[k] < 0) ? -quant : quant;
1050 }
1051
1052
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163776 if (use_pred) i = 63;
1053 } else { // no AC coeffs
1054 int k;
1055
1056 72466 memset(ac_val2, 0, 16 * 2);
1057
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72466 if (dc_pred_dir) { // left
1058
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34095 if (use_pred) {
1059 6724 memcpy(ac_val2, ac_val, 8 * 2);
1060
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6724 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1061
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6724 if (q1 < 1)
1062 return AVERROR_INVALIDDATA;
1063
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6724 if (q2)
1064
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6724 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
1065
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6724 if (q2 && q1 != q2) {
1066
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256 for (k = 1; k < 8; k++)
1067 224 ac_val2[k] = (int)(ac_val2[k] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1068 }
1069 }
1070 } else { // top
1071
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38371 if (use_pred) {
1072 2674 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
1073
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2674 q1 = FFABS(q1) * 2 + ((q1 < 0) ? 0 : v->halfpq) - 1;
1074
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2674 if (q1 < 1)
1075 return AVERROR_INVALIDDATA;
1076
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2674 if (q2)
1077
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2674 q2 = FFABS(q2) * 2 + ((q2 < 0) ? 0 : v->halfpq) - 1;
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2674 if (q2 && q1 != q2) {
1079
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104 for (k = 1; k < 8; k++)
1080 91 ac_val2[k + 8] = (int)(ac_val2[k + 8] * (unsigned)q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
1081 }
1082 }
1083 }
1084
1085 /* apply AC prediction if needed */
1086
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72466 if (use_pred) {
1087
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9398 if (dc_pred_dir) { // left
1088
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53792 for (k = 1; k < 8; k++) {
1089 47068 block[k << v->left_blk_sh] = ac_val2[k] * scale;
1090
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47068 if (!v->pquantizer && block[k << v->left_blk_sh])
1091
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127 block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -quant : quant;
1092 }
1093 } else { // top
1094
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21392 for (k = 1; k < 8; k++) {
1095 18718 block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
1096
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18718 if (!v->pquantizer && block[k << v->top_blk_sh])
1097
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129 block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -quant : quant;
1098 }
1099 }
1100 9398 i = 63;
1101 }
1102 }
1103 236242 s->block_last_index[n] = i;
1104
1105 236242 return 0;
1106 }
1107
1108 /** Decode P block
1109 */
1110 705481 static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
1111 int mquant, int ttmb, int first_block,
1112 uint8_t *dst, int linesize, int skip_block,
1113 int *ttmb_out)
1114 {
1115 705481 MpegEncContext *s = &v->s;
1116 705481 GetBitContext *gb = &s->gb;
1117 int i, j;
1118 705481 int subblkpat = 0;
1119 int scale, off, idx, last, skip, value;
1120 705481 int ttblk = ttmb & 7;
1121 705481 int pat = 0;
1122 705481 int quant = FFABS(mquant);
1123
1124 705481 s->bdsp.clear_block(block);
1125
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705481 if (ttmb == -1) {
1127 328239 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index], VC1_TTBLK_VLC_BITS, 1)];
1128 }
1129
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705481 if (ttblk == TT_4X4) {
1130 78333 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index], VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
1131 }
1132
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705481 if ((ttblk != TT_8X8 && ttblk != TT_4X4)
1133
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274082 && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
1134
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243285 || (!v->res_rtm_flag && !first_block))) {
1135 30797 subblkpat = decode012(gb);
1136
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30797 if (subblkpat)
1137 11209 subblkpat ^= 3; // swap decoded pattern bits
1138
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30797 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
1139 5739 ttblk = TT_8X4;
1140
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30797 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
1141 3989 ttblk = TT_4X8;
1142 }
1143
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705481 scale = quant * 2 + ((mquant < 0) ? 0 : v->halfpq);
1144
1145 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
1146
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705481 if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
1147
2/2
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✓ Branch 1 taken 20159 times.
39006 subblkpat = 2 - (ttblk == TT_8X4_TOP);
1148 39006 ttblk = TT_8X4;
1149 }
1150
4/4
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705481 if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
1151
2/2
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47678 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
1152 47678 ttblk = TT_4X8;
1153 }
1154
4/5
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705481 switch (ttblk) {
1155 353066 case TT_8X8:
1156 353066 pat = 0xF;
1157 353066 i = 0;
1158 353066 last = 0;
1159
2/2
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2433675 while (!last) {
1160 2080609 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1161
1/2
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2080609 if (ret < 0)
1162 return ret;
1163 2080609 i += skip;
1164
1/2
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2080609 if (i > 63)
1165 break;
1166
2/2
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✓ Branch 1 taken 1145839 times.
2080609 if (!v->fcm)
1167 934770 idx = v->zz_8x8[0][i++];
1168 else
1169 1145839 idx = v->zzi_8x8[i++];
1170 2080609 block[idx] = value * scale;
1171
2/2
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2080609 if (!v->pquantizer)
1172
2/2
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✓ Branch 1 taken 100272 times.
201139 block[idx] += (block[idx] < 0) ? -quant : quant;
1173 }
1174
1/2
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353066 if (!skip_block) {
1175
2/2
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353066 if (i == 1)
1176 48601 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
1177 else {
1178 304465 v->vc1dsp.vc1_inv_trans_8x8(block);
1179 304465 s->idsp.add_pixels_clamped(block, dst, linesize);
1180 }
1181 }
1182 353066 break;
1183 78333 case TT_4X4:
1184 78333 pat = ~subblkpat & 0xF;
1185
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391665 for (j = 0; j < 4; j++) {
1186 313332 last = subblkpat & (1 << (3 - j));
1187 313332 i = 0;
1188 313332 off = (j & 1) * 4 + (j & 2) * 16;
1189
2/2
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826087 while (!last) {
1190 512755 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1191
1/2
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512755 if (ret < 0)
1192 return ret;
1193 512755 i += skip;
1194
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512755 if (i > 15)
1195 break;
1196
2/2
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512755 if (!v->fcm)
1197 283472 idx = ff_vc1_simple_progressive_4x4_zz[i++];
1198 else
1199 229283 idx = ff_vc1_adv_interlaced_4x4_zz[i++];
1200 512755 block[idx + off] = value * scale;
1201
2/2
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512755 if (!v->pquantizer)
1202
2/2
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9718 block[idx + off] += (block[idx + off] < 0) ? -quant : quant;
1203 }
1204
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313332 if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
1205
2/2
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191401 if (i == 1)
1206 21249 v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1207 else
1208 170152 v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
1209 }
1210 }
1211 78333 break;
1212 134484 case TT_8X4:
1213 134484 pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
1214
2/2
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403452 for (j = 0; j < 2; j++) {
1215 268968 last = subblkpat & (1 << (1 - j));
1216 268968 i = 0;
1217 268968 off = j * 32;
1218
2/2
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1171607 while (!last) {
1219 902639 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1220
1/2
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902639 if (ret < 0)
1221 return ret;
1222 902639 i += skip;
1223
1/2
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902639 if (i > 31)
1224 break;
1225
2/2
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902639 if (!v->fcm)
1226 470573 idx = v->zz_8x4[i++] + off;
1227 else
1228 432066 idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
1229 902639 block[idx] = value * scale;
1230
2/2
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902639 if (!v->pquantizer)
1231
2/2
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9538 block[idx] += (block[idx] < 0) ? -quant : quant;
1232 }
1233
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268968 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1234
2/2
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223232 if (i == 1)
1235 15847 v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
1236 else
1237 207385 v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
1238 }
1239 }
1240 134484 break;
1241 139598 case TT_4X8:
1242 139598 pat = ~(subblkpat * 5) & 0xF;
1243
2/2
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418794 for (j = 0; j < 2; j++) {
1244 279196 last = subblkpat & (1 << (1 - j));
1245 279196 i = 0;
1246 279196 off = j * 4;
1247
2/2
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1161199 while (!last) {
1248 882009 int ret = vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
1249
1/2
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882009 if (ret < 0)
1250 return ret;
1251 882009 i += skip;
1252
2/2
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882009 if (i > 31)
1253 6 break;
1254
2/2
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882003 if (!v->fcm)
1255 432119 idx = v->zz_4x8[i++] + off;
1256 else
1257 449884 idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
1258 882003 block[idx] = value * scale;
1259
2/2
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882003 if (!v->pquantizer)
1260
2/2
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10845 block[idx] += (block[idx] < 0) ? -quant : quant;
1261 }
1262
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279196 if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
1263
2/2
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227039 if (i == 1)
1264 17934 v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
1265 else
1266 209105 v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
1267 }
1268 }
1269 139598 break;
1270 }
1271
2/2
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705481 if (ttmb_out)
1272 648016 *ttmb_out |= ttblk << (n * 4);
1273 705481 return pat;
1274 }
1275
1276 /** @} */ // Macroblock group
1277
1278 static const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 };
1279
1280 /** Decode one P-frame MB
1281 */
1282 152608 static int vc1_decode_p_mb(VC1Context *v)
1283 {
1284 152608 MpegEncContext *s = &v->s;
1285 152608 GetBitContext *gb = &s->gb;
1286 int i, j;
1287 152608 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1288 int cbp; /* cbp decoding stuff */
1289 int mqdiff, mquant; /* MB quantization */
1290 152608 int ttmb = v->ttfrm; /* MB Transform type */
1291
1292 152608 int mb_has_coeffs = 1; /* last_flag */
1293 int dmv_x, dmv_y; /* Differential MV components */
1294 int index, index1; /* LUT indexes */
1295 int val, sign; /* temp values */
1296 152608 int first_block = 1;
1297 int dst_idx, off;
1298 int skipped, fourmv;
1299 152608 int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
1300
1301 152608 mquant = v->pq; /* lossy initialization */
1302
1303
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152608 if (v->mv_type_is_raw)
1304 58770 fourmv = get_bits1(gb);
1305 else
1306 93838 fourmv = v->mv_type_mb_plane[mb_pos];
1307
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152608 if (v->skip_is_raw)
1308 58470 skipped = get_bits1(gb);
1309 else
1310 94138 skipped = v->s.mbskip_table[mb_pos];
1311
1312
2/2
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152608 if (!fourmv) { /* 1MV mode */
1313
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126032 if (!skipped) {
1314
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113910 GET_MVDATA(dmv_x, dmv_y);
1315
1316
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113910 if (s->mb_intra) {
1317 24987 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
1318 24987 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
1319 }
1320
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113910 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
1321 113910 ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1322
1323 /* FIXME Set DC val for inter block ? */
1324
4/4
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113910 if (s->mb_intra && !mb_has_coeffs) {
1325
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2748 GET_MQUANT();
1326 2748 s->ac_pred = get_bits1(gb);
1327 2748 cbp = 0;
1328
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111162 } else if (mb_has_coeffs) {
1329
2/2
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92378 if (s->mb_intra)
1330 22239 s->ac_pred = get_bits1(gb);
1331 92378 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
1332
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92378 GET_MQUANT();
1333 } else {
1334 18784 mquant = v->pq;
1335 18784 cbp = 0;
1336 }
1337 113910 s->current_picture.qscale_table[mb_pos] = mquant;
1338
1339
6/6
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113910 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
1340 42234 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index],
1341 VC1_TTMB_VLC_BITS, 2);
1342
2/2
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113910 if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
1343 113910 dst_idx = 0;
1344
2/2
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797370 for (i = 0; i < 6; i++) {
1345 683460 s->dc_val[0][s->block_index[i]] = 0;
1346 683460 dst_idx += i >> 2;
1347 683460 val = ((cbp >> (5 - i)) & 1);
1348
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683460 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1349 683460 v->mb_type[0][s->block_index[i]] = s->mb_intra;
1350
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683460 if (s->mb_intra) {
1351 /* check if prediction blocks A and C are available */
1352 149922 v->a_avail = v->c_avail = 0;
1353
6/6
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149922 if (i == 2 || i == 3 || !s->first_slice_line)
1354 110530 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1355
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149922 if (i == 1 || i == 3 || s->mb_x)
1356 147306 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1357
1358 149922 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1359
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149922 (i & 4) ? v->codingset2 : v->codingset);
1360 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1361 continue;
1362 149922 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1363
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149922 if (v->rangeredfrm)
1364 for (j = 0; j < 64; j++)
1365 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1366 149922 block_cbp |= 0xF << (i << 2);
1367 149922 block_intra |= 1 << i;
1368
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533538 } else if (val) {
1369 658434 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb, first_block,
1370
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219478 s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
1371 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1372
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219478 if (pat < 0)
1373 return pat;
1374 219478 block_cbp |= pat << (i << 2);
1375
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219478 if (!v->ttmbf && ttmb < 8)
1376 87522 ttmb = -1;
1377 219478 first_block = 0;
1378 }
1379 }
1380 } else { // skipped
1381 12122 s->mb_intra = 0;
1382
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84854 for (i = 0; i < 6; i++) {
1383 72732 v->mb_type[0][s->block_index[i]] = 0;
1384 72732 s->dc_val[0][s->block_index[i]] = 0;
1385 }
1386 12122 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1387 12122 s->current_picture.qscale_table[mb_pos] = 0;
1388 12122 ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1389 12122 ff_vc1_mc_1mv(v, 0);
1390 }
1391 } else { // 4MV mode
1392
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26576 if (!skipped /* unskipped MB */) {
1393 22855 int intra_count = 0, coded_inter = 0;
1394 int is_intra[6], is_coded[6];
1395 /* Get CBPCY */
1396 22855 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
1397
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159985 for (i = 0; i < 6; i++) {
1398 137130 val = ((cbp >> (5 - i)) & 1);
1399 137130 s->dc_val[0][s->block_index[i]] = 0;
1400 137130 s->mb_intra = 0;
1401
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137130 if (i < 4) {
1402 91420 dmv_x = dmv_y = 0;
1403 91420 s->mb_intra = 0;
1404 91420 mb_has_coeffs = 0;
1405
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91420 if (val) {
1406
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71997 GET_MVDATA(dmv_x, dmv_y);
1407 }
1408 91420 ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1409
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91420 if (!s->mb_intra)
1410 80856 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1411 91420 intra_count += s->mb_intra;
1412 91420 is_intra[i] = s->mb_intra;
1413 91420 is_coded[i] = mb_has_coeffs;
1414 }
1415
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137130 if (i & 4) {
1416 45710 is_intra[i] = (intra_count >= 3);
1417 45710 is_coded[i] = val;
1418 }
1419
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137130 if (i == 4)
1420 22855 ff_vc1_mc_4mv_chroma(v, 0);
1421 137130 v->mb_type[0][s->block_index[i]] = is_intra[i];
1422
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137130 if (!coded_inter)
1423 52317 coded_inter = !is_intra[i] & is_coded[i];
1424 }
1425 // if there are no coded blocks then don't do anything more
1426 22855 dst_idx = 0;
1427
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22855 if (!intra_count && !coded_inter)
1428 2699 goto end;
1429
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20156 GET_MQUANT();
1430 20156 s->current_picture.qscale_table[mb_pos] = mquant;
1431 /* test if block is intra and has pred */
1432 {
1433 20156 int intrapred = 0;
1434
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122744 for (i = 0; i < 6; i++)
1435
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106282 if (is_intra[i]) {
1436
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7257 if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
1437
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5463 || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
1438 3694 intrapred = 1;
1439 3694 break;
1440 }
1441 }
1442
2/2
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20156 if (intrapred)
1443 3694 s->ac_pred = get_bits1(gb);
1444 else
1445 16462 s->ac_pred = 0;
1446 }
1447
4/4
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20156 if (!v->ttmbf && coded_inter)
1448 18220 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
1449
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141092 for (i = 0; i < 6; i++) {
1450 120936 dst_idx += i >> 2;
1451
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120936 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1452 120936 s->mb_intra = is_intra[i];
1453
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120936 if (is_intra[i]) {
1454 /* check if prediction blocks A and C are available */
1455 13000 v->a_avail = v->c_avail = 0;
1456
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13000 if (i == 2 || i == 3 || !s->first_slice_line)
1457 10021 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1458
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13000 if (i == 1 || i == 3 || s->mb_x)
1459 12804 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1460
1461 13000 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, is_coded[i], mquant,
1462
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13000 (i & 4) ? v->codingset2 : v->codingset);
1463 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1464 continue;
1465 13000 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1466
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13000 if (v->rangeredfrm)
1467 for (j = 0; j < 64; j++)
1468 v->block[v->cur_blk_idx][block_map[i]][j] *= 2;
1469 13000 block_cbp |= 0xF << (i << 2);
1470 13000 block_intra |= 1 << i;
1471
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107936 } else if (is_coded[i]) {
1472 200115 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1473 66705 first_block, s->dest[dst_idx] + off,
1474
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66705 (i & 4) ? s->uvlinesize : s->linesize,
1475 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
1476 &block_tt);
1477
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66705 if (pat < 0)
1478 return pat;
1479 66705 block_cbp |= pat << (i << 2);
1480
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66705 if (!v->ttmbf && ttmb < 8)
1481 44004 ttmb = -1;
1482 66705 first_block = 0;
1483 }
1484 }
1485 } else { // skipped MB
1486 3721 s->mb_intra = 0;
1487 3721 s->current_picture.qscale_table[mb_pos] = 0;
1488
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26047 for (i = 0; i < 6; i++) {
1489 22326 v->mb_type[0][s->block_index[i]] = 0;
1490 22326 s->dc_val[0][s->block_index[i]] = 0;
1491 }
1492
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18605 for (i = 0; i < 4; i++) {
1493 14884 ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
1494 14884 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1495 }
1496 3721 ff_vc1_mc_4mv_chroma(v, 0);
1497 3721 s->current_picture.qscale_table[mb_pos] = 0;
1498 }
1499 }
1500 152608 end:
1501
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152608 if (v->overlap && v->pq >= 9)
1502 ff_vc1_p_overlap_filter(v);
1503 152608 vc1_put_blocks_clamped(v, 1);
1504
1505 152608 v->cbp[s->mb_x] = block_cbp;
1506 152608 v->ttblk[s->mb_x] = block_tt;
1507 152608 v->is_intra[s->mb_x] = block_intra;
1508
1509 152608 return 0;
1510 }
1511
1512 /* Decode one macroblock in an interlaced frame p picture */
1513
1514 16320 static int vc1_decode_p_mb_intfr(VC1Context *v)
1515 {
1516 16320 MpegEncContext *s = &v->s;
1517 16320 GetBitContext *gb = &s->gb;
1518 int i;
1519 16320 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1520 16320 int cbp = 0; /* cbp decoding stuff */
1521 int mqdiff, mquant; /* MB quantization */
1522 16320 int ttmb = v->ttfrm; /* MB Transform type */
1523
1524 16320 int mb_has_coeffs = 1; /* last_flag */
1525 int dmv_x, dmv_y; /* Differential MV components */
1526 int val; /* temp value */
1527 16320 int first_block = 1;
1528 int dst_idx, off;
1529 16320 int skipped, fourmv = 0, twomv = 0;
1530 16320 int block_cbp = 0, pat, block_tt = 0;
1531 16320 int idx_mbmode = 0, mvbp;
1532 int fieldtx;
1533
1534 16320 mquant = v->pq; /* Lossy initialization */
1535
1536
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16320 if (v->skip_is_raw)
1537 skipped = get_bits1(gb);
1538 else
1539 16320 skipped = v->s.mbskip_table[mb_pos];
1540
2/2
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16320 if (!skipped) {
1541
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16307 if (v->fourmvswitch)
1542 16307 idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
1543 else
1544 idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
1545
5/5
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16307 switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
1546 /* store the motion vector type in a flag (useful later) */
1547 704 case MV_PMODE_INTFR_4MV:
1548 704 fourmv = 1;
1549 704 v->blk_mv_type[s->block_index[0]] = 0;
1550 704 v->blk_mv_type[s->block_index[1]] = 0;
1551 704 v->blk_mv_type[s->block_index[2]] = 0;
1552 704 v->blk_mv_type[s->block_index[3]] = 0;
1553 704 break;
1554 1084 case MV_PMODE_INTFR_4MV_FIELD:
1555 1084 fourmv = 1;
1556 1084 v->blk_mv_type[s->block_index[0]] = 1;
1557 1084 v->blk_mv_type[s->block_index[1]] = 1;
1558 1084 v->blk_mv_type[s->block_index[2]] = 1;
1559 1084 v->blk_mv_type[s->block_index[3]] = 1;
1560 1084 break;
1561 4797 case MV_PMODE_INTFR_2MV_FIELD:
1562 4797 twomv = 1;
1563 4797 v->blk_mv_type[s->block_index[0]] = 1;
1564 4797 v->blk_mv_type[s->block_index[1]] = 1;
1565 4797 v->blk_mv_type[s->block_index[2]] = 1;
1566 4797 v->blk_mv_type[s->block_index[3]] = 1;
1567 4797 break;
1568 8046 case MV_PMODE_INTFR_1MV:
1569 8046 v->blk_mv_type[s->block_index[0]] = 0;
1570 8046 v->blk_mv_type[s->block_index[1]] = 0;
1571 8046 v->blk_mv_type[s->block_index[2]] = 0;
1572 8046 v->blk_mv_type[s->block_index[3]] = 0;
1573 8046 break;
1574 }
1575
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16307 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
1576
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8380 for (i = 0; i < 4; i++) {
1577 6704 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
1578 6704 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
1579 }
1580 1676 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1581 1676 s->mb_intra = 1;
1582 1676 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
1583 1676 fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
1584 1676 mb_has_coeffs = get_bits1(gb);
1585
2/2
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1676 if (mb_has_coeffs)
1586 1615 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
1587 1676 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1588
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1676 GET_MQUANT();
1589 1676 s->current_picture.qscale_table[mb_pos] = mquant;
1590 /* Set DC scale - y and c use the same (not sure if necessary here) */
1591
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1676 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1592
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1676 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1593 1676 dst_idx = 0;
1594
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11732 for (i = 0; i < 6; i++) {
1595 10056 v->a_avail = v->c_avail = 0;
1596 10056 v->mb_type[0][s->block_index[i]] = 1;
1597 10056 s->dc_val[0][s->block_index[i]] = 0;
1598 10056 dst_idx += i >> 2;
1599 10056 val = ((cbp >> (5 - i)) & 1);
1600
6/6
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10056 if (i == 2 || i == 3 || !s->first_slice_line)
1601 9840 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
1602
6/6
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10056 if (i == 1 || i == 3 || s->mb_x)
1603 10000 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
1604
1605 10056 vc1_decode_intra_block(v, v->block[v->cur_blk_idx][block_map[i]], i, val, mquant,
1606
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10056 (i & 4) ? v->codingset2 : v->codingset);
1607 if (CONFIG_GRAY && (i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1608 continue;
1609 10056 v->vc1dsp.vc1_inv_trans_8x8(v->block[v->cur_blk_idx][block_map[i]]);
1610
2/2
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10056 if (i < 4)
1611
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6704 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
1612 else
1613 3352 off = 0;
1614 10056 block_cbp |= 0xf << (i << 2);
1615 }
1616
1617 } else { // inter MB
1618 14631 mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
1619
2/2
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14631 if (mb_has_coeffs)
1620 13330 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
1621
2/2
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14631 if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
1622 4797 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
1623 } else {
1624
2/2
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9834 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
1625
2/2
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9130 || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
1626 1788 v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
1627 }
1628 }
1629 14631 s->mb_intra = v->is_intra[s->mb_x] = 0;
1630
2/2
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102417 for (i = 0; i < 6; i++)
1631 87786 v->mb_type[0][s->block_index[i]] = 0;
1632 14631 fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
1633 /* for all motion vector read MVDATA and motion compensate each block */
1634 14631 dst_idx = 0;
1635
2/2
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14631 if (fourmv) {
1636 1788 mvbp = v->fourmvbp;
1637
2/2
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8940 for (i = 0; i < 4; i++) {
1638 7152 dmv_x = dmv_y = 0;
1639
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7152 if (mvbp & (8 >> i))
1640 5798 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1641 7152 ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, 0);
1642 7152 ff_vc1_mc_4mv_luma(v, i, 0, 0);
1643 }
1644 1788 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1645
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12843 } else if (twomv) {
1646 4797 mvbp = v->twomvbp;
1647 4797 dmv_x = dmv_y = 0;
1648
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4797 if (mvbp & 2) {
1649 4513 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1650 }
1651 4797 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1652 4797 ff_vc1_mc_4mv_luma(v, 0, 0, 0);
1653 4797 ff_vc1_mc_4mv_luma(v, 1, 0, 0);
1654 4797 dmv_x = dmv_y = 0;
1655
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4797 if (mvbp & 1) {
1656 4517 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1657 }
1658 4797 ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, 0);
1659 4797 ff_vc1_mc_4mv_luma(v, 2, 0, 0);
1660 4797 ff_vc1_mc_4mv_luma(v, 3, 0, 0);
1661 4797 ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
1662 } else {
1663 8046 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
1664 8046 dmv_x = dmv_y = 0;
1665
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8046 if (mvbp) {
1666 7892 get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
1667 }
1668 8046 ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, 0);
1669 8046 ff_vc1_mc_1mv(v, 0);
1670 }
1671
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14631 if (cbp)
1672
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13330 GET_MQUANT(); // p. 227
1673 14631 s->current_picture.qscale_table[mb_pos] = mquant;
1674
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14631 if (!v->ttmbf && cbp)
1675 13330 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
1676
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102417 for (i = 0; i < 6; i++) {
1677 87786 s->dc_val[0][s->block_index[i]] = 0;
1678 87786 dst_idx += i >> 2;
1679 87786 val = ((cbp >> (5 - i)) & 1);
1680
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87786 if (!fieldtx)
1681
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70050 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
1682 else
1683
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17736 off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
1684
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87786 if (val) {
1685 190881 pat = vc1_decode_p_block(v, v->block[v->cur_blk_idx][block_map[i]], i, mquant, ttmb,
1686 63627 first_block, s->dest[dst_idx] + off,
1687
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63627 (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
1688 CONFIG_GRAY && (i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
1689
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63627 if (pat < 0)
1690 return pat;
1691 63627 block_cbp |= pat << (i << 2);
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63627 if (!v->ttmbf && ttmb < 8)
1693 44047 ttmb = -1;
1694 63627 first_block = 0;
1695 }
1696 }
1697 }
1698 } else { // skipped
1699 13 s->mb_intra = v->is_intra[s->mb_x] = 0;
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91 for (i = 0; i < 6; i++) {
1701 78 v->mb_type[0][s->block_index[i]] = 0;
1702 78 s->dc_val[0][s->block_index[i]] = 0;
1703 }
1704 13 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
1705 13 s->current_picture.qscale_table[mb_pos] = 0;
1706 13 v->blk_mv_type[s->block_index[0]] = 0;
1707 13 v->blk_mv_type[s->block_index[1]] = 0;
1708 13 v->blk_mv_type[s->block_index[2]] = 0;
1709 13 v->blk_mv_type[s->block_index[3]] = 0;
1710 13 ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, 0);
1711 13 ff_vc1_mc_1mv(v, 0);
1712 13 v->fieldtx_plane[mb_pos] = 0;
1713 }
1714
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16320 if (v->overlap && v->pq >= 9)
1715 ff_vc1_p_overlap_filter(v);
1716 16320 vc1_put_blocks_clamped(v, 1);
1717
1718 16320 v->cbp[s->mb_x] = block_cbp;
1719 16320 v->ttblk[s->mb_x] = block_tt;
1720
1721 16320 return 0;
1722 }
1723
1724 37920 static int vc1_decode_p_mb_intfi(VC1Context *v)
1725 {
1726 37920 MpegEncContext *s = &v->s;
1727 37920 GetBitContext *gb = &s->gb;
1728 int i;
1729 37920 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1730 37920 int cbp = 0; /* cbp decoding stuff */
1731 int mqdiff, mquant; /* MB quantization */
1732 37920 int ttmb = v->ttfrm; /* MB Transform type */
1733
1734 37920 int mb_has_coeffs = 1; /* last_flag */
1735 int dmv_x, dmv_y; /* Differential MV components */
1736 int val; /* temp values */
1737 37920 int first_block = 1;
1738 int dst_idx, off;
1739 37920 int pred_flag = 0;
1740 37920 int block_cbp = 0, pat, block_tt = 0;
1741 37920 int idx_mbmode = 0;
1742
1743 37920 mquant = v->pq; /* Lossy initialization */
1744
1745 37920 idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_IF_MBMODE_VLC_BITS, 2);
1746
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37920 if (idx_mbmode <= 1) { // intra MB
1747 10225 v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
1748 10225 s->mb_intra = 1;
1749 10225 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
1750 10225 s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
1751 10225 s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
1752
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10225 GET_MQUANT();
1753 10225 s->current_picture.qscale_table[mb_pos] = mquant;
1754 /* Set DC scale - y and c use the same (not sure if necessary here) */
1755
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10225 s->y_dc_scale = s->y_dc_scale_table[FFABS(mquant)];
1756
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10225 s->c_dc_scale = s->c_dc_scale_table[FFABS(mquant)];
1757 10225 v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
1758 10225 mb_has_coeffs = idx_mbmode & 1;
1759
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10225 if (mb_has_coeffs)
1760 9472 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_ICBPCY_VLC_BITS, 2);
1761 10225 dst_idx = 0;
1762
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71575 for (i = 0; i < 6; i++)