FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vc1.c
Date: 2025-04-25 22:50:00
Exec Total Coverage
Lines: 700 870 80.5%
Functions: 11 11 100.0%
Branches: 388 624 62.2%
Line Branch Exec Source
1 /*
2 * VC-1 and WMV3 decoder common code
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 decoder common code
27 */
28
29 #include "avcodec.h"
30 #include "decode.h"
31 #include "mpegvideo.h"
32 #include "vc1.h"
33 #include "vc1data.h"
34 #include "wmv2data.h"
35 #include "unary.h"
36
37 /***********************************************************************/
38 /**
39 * @name VC-1 Bitplane decoding
40 * @see 8.7, p56
41 * @{
42 */
43
44 /** Decode rows by checking if they are skipped
45 * @param plane Buffer to store decoded bits
46 * @param[in] width Width of this buffer
47 * @param[in] height Height of this buffer
48 * @param[in] stride of this buffer
49 */
50 193 static void decode_rowskip(uint8_t* plane, int width, int height, int stride,
51 GetBitContext *gb)
52 {
53 int x, y;
54
55
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 769 for (y = 0; y < height; y++) {
56
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 576 if (!get_bits1(gb)) //rowskip
57 277 memset(plane, 0, width);
58 else
59
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 7615 for (x = 0; x < width; x++)
60 7316 plane[x] = get_bits1(gb);
61 576 plane += stride;
62 }
63 193 }
64
65 /** Decode columns by checking if they are skipped
66 * @param plane Buffer to store decoded bits
67 * @param[in] width Width of this buffer
68 * @param[in] height Height of this buffer
69 * @param[in] stride of this buffer
70 * @todo FIXME: Optimize
71 */
72 121 static void decode_colskip(uint8_t* plane, int width, int height, int stride,
73 GetBitContext *gb)
74 {
75 int x, y;
76
77
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 909 for (x = 0; x < width; x++) {
78
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 788 if (!get_bits1(gb)) //colskip
79
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 9175 for (y = 0; y < height; y++)
80 8912 plane[y*stride] = 0;
81 else
82
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 7301 for (y = 0; y < height; y++)
83 6776 plane[y*stride] = get_bits1(gb);
84 788 plane ++;
85 }
86 121 }
87
88 /** Decode a bitplane's bits
89 * @param data bitplane where to store the decode bits
90 * @param[out] raw_flag pointer to the flag indicating that this bitplane is not coded explicitly
91 * @param v VC-1 context for bit reading and logging
92 * @return Status
93 * @todo FIXME: Optimize
94 */
95 1112 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
96 {
97 1112 GetBitContext *gb = &v->s.gb;
98
99 int imode, x, y, code, offset;
100 1112 uint8_t invert, *planep = data;
101 int width, height, stride;
102
103 1112 width = v->s.mb_width;
104 1112 height = v->s.mb_height >> v->field_mode;
105 1112 stride = v->s.mb_stride;
106 1112 invert = get_bits1(gb);
107 1112 imode = get_vlc2(gb, ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 1);
108
109 1112 *raw_flag = 0;
110
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 1112 switch (imode) {
111 636 case IMODE_RAW:
112 //Data is actually read in the MB layer (same for all tests == "raw")
113 636 *raw_flag = 1; //invert ignored
114 636 return invert;
115 167 case IMODE_DIFF2:
116 case IMODE_NORM2:
117
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 167 if ((height * width) & 1) {
118 114 *planep++ = get_bits1(gb);
119 114 y = offset = 1;
120
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 114 if (offset == width) {
121 ✗ offset = 0;
122 ✗ planep += stride - width;
123 }
124 }
125 else
126 53 y = offset = 0;
127 // decode bitplane as one long line
128
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 46073 for (; y < height * width; y += 2) {
129 45906 code = get_vlc2(gb, ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 1);
130 45906 *planep++ = code & 1;
131 45906 offset++;
132
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 45906 if (offset == width) {
133 535 offset = 0;
134 535 planep += stride - width;
135 }
136 45906 *planep++ = code >> 1;
137 45906 offset++;
138
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 45906 if (offset == width) {
139 1493 offset = 0;
140 1493 planep += stride - width;
141 }
142 }
143 167 break;
144 250 case IMODE_DIFF6:
145 case IMODE_NORM6:
146
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 250 if (!(height % 3) && (width % 3)) { // use 2x3 decoding
147
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 102 for (y = 0; y < height; y += 3) {
148
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 823 for (x = width & 1; x < width; x += 2) {
149 740 code = get_vlc2(gb, ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 2);
150
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 740 if (code < 0) {
151 ✗ av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
152 ✗ return -1;
153 }
154 740 planep[x + 0] = (code >> 0) & 1;
155 740 planep[x + 1] = (code >> 1) & 1;
156 740 planep[x + 0 + stride] = (code >> 2) & 1;
157 740 planep[x + 1 + stride] = (code >> 3) & 1;
158 740 planep[x + 0 + stride * 2] = (code >> 4) & 1;
159 740 planep[x + 1 + stride * 2] = (code >> 5) & 1;
160 }
161 83 planep += stride * 3;
162 }
163
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 19 if (width & 1)
164 6 decode_colskip(data, 1, height, stride, &v->s.gb);
165 } else { // 3x2
166 231 planep += (height & 1) * stride;
167
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 2233 for (y = height & 1; y < height; y += 2) {
168
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 34362 for (x = width % 3; x < width; x += 3) {
169 32360 code = get_vlc2(gb, ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 2);
170
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 32360 if (code < 0) {
171 ✗ av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
172 ✗ return -1;
173 }
174 32360 planep[x + 0] = (code >> 0) & 1;
175 32360 planep[x + 1] = (code >> 1) & 1;
176 32360 planep[x + 2] = (code >> 2) & 1;
177 32360 planep[x + 0 + stride] = (code >> 3) & 1;
178 32360 planep[x + 1 + stride] = (code >> 4) & 1;
179 32360 planep[x + 2 + stride] = (code >> 5) & 1;
180 }
181 2002 planep += stride * 2;
182 }
183 231 x = width % 3;
184
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 231 if (x)
185 89 decode_colskip(data, x, height, stride, &v->s.gb);
186
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 231 if (height & 1)
187 160 decode_rowskip(data + x, width - x, 1, stride, &v->s.gb);
188 }
189 250 break;
190 33 case IMODE_ROWSKIP:
191 33 decode_rowskip(data, width, height, stride, &v->s.gb);
192 33 break;
193 26 case IMODE_COLSKIP:
194 26 decode_colskip(data, width, height, stride, &v->s.gb);
195 26 break;
196 ✗ default:
197 ✗ break;
198 }
199
200 /* Applying diff operator */
201
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 476 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) {
202 122 planep = data;
203 122 planep[0] ^= invert;
204
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 3773 for (x = 1; x < width; x++)
205 3651 planep[x] ^= planep[x-1];
206
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 1937 for (y = 1; y < height; y++) {
207 1815 planep += stride;
208 1815 planep[0] ^= planep[-stride];
209
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 96919 for (x = 1; x < width; x++) {
210
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 95104 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
211 68287 else planep[x] ^= planep[x-1];
212 }
213 }
214
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 354 } else if (invert) {
215 46 planep = data;
216
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 14936 for (x = 0; x < stride * height; x++)
217 14890 planep[x] = !planep[x]; //FIXME stride
218 }
219 476 return (imode << 1) + invert;
220 }
221
222 /** @} */ //Bitplane group
223
224 /***********************************************************************/
225 /** VOP Dquant decoding
226 * @param v VC-1 Context
227 */
228 148 static int vop_dquant_decoding(VC1Context *v)
229 {
230 148 GetBitContext *gb = &v->s.gb;
231 int pqdiff;
232
233 //variable size
234
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 148 if (v->dquant != 2) {
235 148 v->dquantfrm = get_bits1(gb);
236
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 148 if (!v->dquantfrm)
237 65 return 0;
238
239 83 v->dqprofile = get_bits(gb, 2);
240
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 83 switch (v->dqprofile) {
241 62 case DQPROFILE_SINGLE_EDGE:
242 case DQPROFILE_DOUBLE_EDGES:
243 62 v->dqsbedge = get_bits(gb, 2);
244 62 break;
245 20 case DQPROFILE_ALL_MBS:
246 20 v->dqbilevel = get_bits1(gb);
247
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 20 if (!v->dqbilevel) {
248 2 v->halfpq = 0;
249 2 return 0;
250 }
251 default:
252 19 break; //Forbidden ?
253 }
254 }
255
256 81 pqdiff = get_bits(gb, 3);
257
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 81 if (pqdiff == 7)
258 18 v->altpq = get_bits(gb, 5);
259 else
260 63 v->altpq = v->pq + pqdiff + 1;
261
262 81 return 0;
263 }
264
265 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
266
267 /**
268 * Decode Simple/Main Profiles sequence header
269 * @see Figure 7-8, p16-17
270 * @param avctx Codec context
271 * @param gb GetBit context initialized from Codec context extra_data
272 * @return Status
273 */
274 31 int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
275 {
276 31 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits_long(gb, 32));
277 31 v->profile = get_bits(gb, 2);
278
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 31 if (v->profile == PROFILE_COMPLEX) {
279 ✗ av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
280 }
281
282
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 31 if (v->profile == PROFILE_ADVANCED) {
283 24 v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
284 24 v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
285 24 return decode_sequence_header_adv(v, gb);
286 } else {
287 7 v->chromaformat = 1;
288 7 v->zz_8x4 = ff_wmv2_scantableA;
289 7 v->zz_4x8 = ff_wmv2_scantableB;
290 7 v->res_y411 = get_bits1(gb);
291 7 v->res_sprite = get_bits1(gb);
292
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 7 if (v->res_y411) {
293 ✗ av_log(avctx, AV_LOG_ERROR,
294 "Old interlaced mode is not supported\n");
295 ✗ return -1;
296 }
297 }
298
299 // (fps-2)/4 (->30)
300 7 v->frmrtq_postproc = get_bits(gb, 3); //common
301 // (bitrate-32kbps)/64kbps
302 7 v->bitrtq_postproc = get_bits(gb, 5); //common
303 7 v->s.loop_filter = get_bits1(gb); //common
304
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 7 if (v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) {
305 ✗ av_log(avctx, AV_LOG_ERROR,
306 "LOOPFILTER shall not be enabled in Simple Profile\n");
307 }
308
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 7 if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
309 ✗ v->s.loop_filter = 0;
310
311 7 v->res_x8 = get_bits1(gb); //reserved
312 7 v->multires = get_bits1(gb);
313 7 v->res_fasttx = get_bits1(gb);
314
315 7 v->fastuvmc = get_bits1(gb); //common
316
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 7 if (!v->profile && !v->fastuvmc) {
317 ✗ av_log(avctx, AV_LOG_ERROR,
318 "FASTUVMC unavailable in Simple Profile\n");
319 ✗ return -1;
320 }
321 7 v->extended_mv = get_bits1(gb); //common
322
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 7 if (!v->profile && v->extended_mv) {
323 ✗ av_log(avctx, AV_LOG_ERROR,
324 "Extended MVs unavailable in Simple Profile\n");
325 ✗ return -1;
326 }
327 7 v->dquant = get_bits(gb, 2); //common
328 7 v->vstransform = get_bits1(gb); //common
329
330 7 v->res_transtab = get_bits1(gb);
331
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 7 if (v->res_transtab) {
332 ✗ av_log(avctx, AV_LOG_ERROR,
333 "1 for reserved RES_TRANSTAB is forbidden\n");
334 ✗ return -1;
335 }
336
337 7 v->overlap = get_bits1(gb); //common
338
339 7 v->resync_marker = get_bits1(gb);
340 7 v->rangered = get_bits1(gb);
341
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 7 if (v->rangered && v->profile == PROFILE_SIMPLE) {
342 ✗ av_log(avctx, AV_LOG_INFO,
343 "RANGERED should be set to 0 in Simple Profile\n");
344 }
345
346 7 v->max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
347 7 v->quantizer_mode = get_bits(gb, 2); //common
348
349 7 v->finterpflag = get_bits1(gb); //common
350
351
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 7 if (v->res_sprite) {
352 ✗ int w = get_bits(gb, 11);
353 ✗ int h = get_bits(gb, 11);
354 ✗ int ret = ff_set_dimensions(v->s.avctx, w, h);
355 ✗ if (ret < 0) {
356 ✗ av_log(avctx, AV_LOG_ERROR, "Failed to set dimensions %d %d\n", w, h);
357 ✗ return ret;
358 }
359 ✗ skip_bits(gb, 5); //frame rate
360 ✗ v->res_x8 = get_bits1(gb);
361 ✗ if (get_bits1(gb)) { // something to do with DC VLC selection
362 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
363 ✗ return -1;
364 }
365 ✗ skip_bits(gb, 3); //slice code
366 ✗ v->res_rtm_flag = 0;
367 } else {
368 7 v->res_rtm_flag = get_bits1(gb); //reserved
369 }
370 //TODO: figure out what they mean (always 0x402F)
371
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 7 if (!v->res_fasttx)
372 ✗ skip_bits(gb, 16);
373 7 av_log(avctx, AV_LOG_DEBUG,
374 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
375 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
376 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
377 "DQuant=%i, Quantizer mode=%i, Max B-frames=%i\n",
378 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
379 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
380 v->rangered, v->vstransform, v->overlap, v->resync_marker,
381 v->dquant, v->quantizer_mode, avctx->max_b_frames);
382 7 return 0;
383 }
384
385 24 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
386 {
387 24 v->res_rtm_flag = 1;
388 24 v->level = get_bits(gb, 3);
389
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 24 if (v->level >= 5) {
390 ✗ av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
391 }
392 24 v->chromaformat = get_bits(gb, 2);
393
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 24 if (v->chromaformat != 1) {
394 ✗ av_log(v->s.avctx, AV_LOG_ERROR,
395 "Only 4:2:0 chroma format supported\n");
396 ✗ return -1;
397 }
398
399 // (fps-2)/4 (->30)
400 24 v->frmrtq_postproc = get_bits(gb, 3); //common
401 // (bitrate-32kbps)/64kbps
402 24 v->bitrtq_postproc = get_bits(gb, 5); //common
403 24 v->postprocflag = get_bits1(gb); //common
404
405 24 v->max_coded_width = (get_bits(gb, 12) + 1) << 1;
406 24 v->max_coded_height = (get_bits(gb, 12) + 1) << 1;
407 24 v->broadcast = get_bits1(gb);
408 24 v->interlace = get_bits1(gb);
409 24 v->tfcntrflag = get_bits1(gb);
410 24 v->finterpflag = get_bits1(gb);
411 24 skip_bits1(gb); // reserved
412
413 24 av_log(v->s.avctx, AV_LOG_DEBUG,
414 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
415 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
416 "TFCTRflag=%i, FINTERPflag=%i\n",
417 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
418 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
419 v->tfcntrflag, v->finterpflag);
420
421 24 v->psf = get_bits1(gb);
422
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 24 if (v->psf) { //PsF, 6.1.13
423 ✗ av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
424 ✗ return -1;
425 }
426 24 v->max_b_frames = v->s.avctx->max_b_frames = 7;
427
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 24 if (get_bits1(gb)) { //Display Info - decoding is not affected by it
428 24 int w, h, ar = 0;
429 24 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
430 24 w = get_bits(gb, 14) + 1;
431 24 h = get_bits(gb, 14) + 1;
432 24 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
433
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 24 if (get_bits1(gb))
434 9 ar = get_bits(gb, 4);
435
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 24 if (ar && ar < 14) {
436 3 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
437
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 21 } else if (ar == 15) {
438 6 w = get_bits(gb, 8) + 1;
439 6 h = get_bits(gb, 8) + 1;
440 6 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
441 } else {
442
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 15 if (v->s.avctx->width > v->max_coded_width ||
443
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 15 v->s.avctx->height > v->max_coded_height) {
444 ✗ avpriv_request_sample(v->s.avctx, "Huge resolution");
445 } else
446 15 av_reduce(&v->s.avctx->sample_aspect_ratio.num,
447 15 &v->s.avctx->sample_aspect_ratio.den,
448 15 v->s.avctx->height * w,
449 15 v->s.avctx->width * h,
450 1 << 30);
451 }
452 24 ff_set_sar(v->s.avctx, v->s.avctx->sample_aspect_ratio);
453 24 av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n",
454 24 v->s.avctx->sample_aspect_ratio.num,
455 24 v->s.avctx->sample_aspect_ratio.den);
456
457
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 24 if (get_bits1(gb)) { //framerate stuff
458
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 9 if (get_bits1(gb)) {
459 ✗ v->s.avctx->framerate.den = 32;
460 ✗ v->s.avctx->framerate.num = get_bits(gb, 16) + 1;
461 } else {
462 int nr, dr;
463 9 nr = get_bits(gb, 8);
464 9 dr = get_bits(gb, 4);
465
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 9 if (nr > 0 && nr < 8 && dr > 0 && dr < 3) {
466 9 v->s.avctx->framerate.den = ff_vc1_fps_dr[dr - 1];
467 9 v->s.avctx->framerate.num = ff_vc1_fps_nr[nr - 1] * 1000;
468 }
469 }
470 }
471
472
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 24 if (get_bits1(gb)) {
473 ✗ v->color_prim = get_bits(gb, 8);
474 ✗ v->transfer_char = get_bits(gb, 8);
475 ✗ v->matrix_coef = get_bits(gb, 8);
476 }
477 }
478
479 24 v->hrd_param_flag = get_bits1(gb);
480
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 24 if (v->hrd_param_flag) {
481 int i;
482 18 v->hrd_num_leaky_buckets = get_bits(gb, 5);
483 18 skip_bits(gb, 4); //bitrate exponent
484 18 skip_bits(gb, 4); //buffer size exponent
485
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 276 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
486 258 skip_bits(gb, 16); //hrd_rate[n]
487 258 skip_bits(gb, 16); //hrd_buffer[n]
488 }
489 }
490 24 return 0;
491 }
492
493 65 int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
494 {
495 int i;
496 int w,h;
497 int ret;
498
499 65 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
500 65 v->broken_link = get_bits1(gb);
501 65 v->closed_entry = get_bits1(gb);
502 65 v->panscanflag = get_bits1(gb);
503 65 v->refdist_flag = get_bits1(gb);
504 65 v->s.loop_filter = get_bits1(gb);
505
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 65 if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
506 ✗ v->s.loop_filter = 0;
507 65 v->fastuvmc = get_bits1(gb);
508 65 v->extended_mv = get_bits1(gb);
509 65 v->dquant = get_bits(gb, 2);
510 65 v->vstransform = get_bits1(gb);
511 65 v->overlap = get_bits1(gb);
512 65 v->quantizer_mode = get_bits(gb, 2);
513
514
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 65 if (v->hrd_param_flag) {
515
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 910 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
516 855 skip_bits(gb, 8); //hrd_full[n]
517 }
518 }
519
520
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 65 if(get_bits1(gb)){
521 50 w = (get_bits(gb, 12)+1)<<1;
522 50 h = (get_bits(gb, 12)+1)<<1;
523 } else {
524 15 w = v->max_coded_width;
525 15 h = v->max_coded_height;
526 }
527
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 65 if ((ret = ff_set_dimensions(avctx, w, h)) < 0) {
528 ✗ av_log(avctx, AV_LOG_ERROR, "Failed to set dimensions %d %d\n", w, h);
529 ✗ return ret;
530 }
531
532
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 65 if (v->extended_mv)
533 15 v->extended_dmv = get_bits1(gb);
534
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 65 if ((v->range_mapy_flag = get_bits1(gb))) {
535 ✗ av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
536 ✗ v->range_mapy = get_bits(gb, 3);
537 }
538
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 65 if ((v->range_mapuv_flag = get_bits1(gb))) {
539 ✗ av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
540 ✗ v->range_mapuv = get_bits(gb, 3);
541 }
542
543 65 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
544 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
545 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
546 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
547 65 v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
548 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
549
550 65 return 0;
551 }
552
553 /* fill lookup tables for intensity compensation */
554 #define INIT_LUT(lumscale, lumshift, luty, lutuv, chain) do { \
555 int scale, shift, i; \
556 if (!lumscale) { \
557 scale = -64; \
558 shift = (255 - lumshift * 2) * 64; \
559 if (lumshift > 31) \
560 shift += 128 << 6; \
561 } else { \
562 scale = lumscale + 32; \
563 if (lumshift > 31) \
564 shift = (lumshift - 64) * 64; \
565 else \
566 shift = lumshift << 6; \
567 } \
568 for (i = 0; i < 256; i++) { \
569 int iy = chain ? luty[i] : i; \
570 int iu = chain ? lutuv[i] : i; \
571 luty[i] = av_clip_uint8((scale * iy + shift + 32) >> 6); \
572 lutuv[i] = av_clip_uint8((scale * (iu - 128) + 128*64 + 32) >> 6);\
573 } \
574 } while(0)
575
576 422 static void rotate_luts(VC1Context *v)
577 {
578
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 422 if (v->s.pict_type == AV_PICTURE_TYPE_BI || v->s.pict_type == AV_PICTURE_TYPE_B) {
579 91 v->curr_use_ic = &v->aux_use_ic;
580 91 v->curr_luty = v->aux_luty;
581 91 v->curr_lutuv = v->aux_lutuv;
582 } else {
583 #define ROTATE(DEF, L, N, C) do { \
584 DEF; \
585 memcpy(&tmp, L , sizeof(tmp)); \
586 memcpy(L , N , sizeof(tmp)); \
587 memcpy(N , &tmp, sizeof(tmp)); \
588 C = N; \
589 } while(0)
590
591 331 ROTATE(int tmp, &v->last_use_ic, &v->next_use_ic, v->curr_use_ic);
592 331 ROTATE(uint8_t tmp[2][256], v->last_luty, v->next_luty, v->curr_luty);
593 331 ROTATE(uint8_t tmp[2][256], v->last_lutuv, v->next_lutuv, v->curr_lutuv);
594 }
595
596
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 108454 INIT_LUT(32, 0, v->curr_luty[0], v->curr_lutuv[0], 0);
597
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 108454 INIT_LUT(32, 0, v->curr_luty[1], v->curr_lutuv[1], 0);
598 422 *v->curr_use_ic = 0;
599 422 }
600
601 167 static int read_bfraction(VC1Context *v, GetBitContext* gb) {
602 167 int bfraction_lut_index = get_bits(gb, 3);
603
604
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 167 if (bfraction_lut_index == 7)
605 ✗ bfraction_lut_index = 7 + get_bits(gb, 4);
606
607
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 167 if (bfraction_lut_index == 21) {
608 ✗ av_log(v->s.avctx, AV_LOG_ERROR, "bfraction invalid\n");
609 ✗ return AVERROR_INVALIDDATA;
610 }
611 167 v->bfraction_lut_index = bfraction_lut_index;
612 167 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
613 167 return 0;
614 }
615
616 265 int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
617 {
618 int pqindex, lowquant, status;
619
620 265 v->field_mode = 0;
621 265 v->fcm = PROGRESSIVE;
622
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 265 if (v->finterpflag)
623 ✗ v->interpfrm = get_bits1(gb);
624
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 265 if (v->s.avctx->codec_id == AV_CODEC_ID_MSS2)
625 82 v->respic =
626 82 v->rangered =
627 82 v->multires = get_bits(gb, 2) == 1;
628 else
629 183 skip_bits(gb, 2); //framecnt unused
630 265 v->rangeredfrm = 0;
631
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 265 if (v->rangered)
632 54 v->rangeredfrm = get_bits1(gb);
633
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 265 if (get_bits1(gb)) {
634 164 v->s.pict_type = AV_PICTURE_TYPE_P;
635 } else {
636
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 101 if (v->s.avctx->max_b_frames && !get_bits1(gb)) {
637 11 v->s.pict_type = AV_PICTURE_TYPE_B;
638 } else
639 90 v->s.pict_type = AV_PICTURE_TYPE_I;
640 }
641
642 265 v->bi_type = 0;
643
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
644
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 11 if (read_bfraction(v, gb) < 0)
645 ✗ return AVERROR_INVALIDDATA;
646
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 11 if (v->bfraction == 0) {
647 ✗ v->s.pict_type = AV_PICTURE_TYPE_BI;
648 }
649 }
650
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
651 90 skip_bits(gb, 7); // skip buffer fullness
652
653
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 265 if (v->parse_only)
654 ✗ return 0;
655
656 /* calculate RND */
657
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
658 90 v->rnd = 1;
659
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_P)
660 164 v->rnd ^= 1;
661
662
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 265 if (get_bits_left(gb) < 5)
663 ✗ return AVERROR_INVALIDDATA;
664 /* Quantizer stuff */
665 265 pqindex = get_bits(gb, 5);
666
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 265 if (!pqindex)
667 ✗ return -1;
668
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 265 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
669 265 v->pq = ff_vc1_pquant_table[0][pqindex];
670 else
671 ✗ v->pq = ff_vc1_pquant_table[1][pqindex];
672 265 v->pqindex = pqindex;
673
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 265 if (pqindex < 9)
674 172 v->halfpq = get_bits1(gb);
675 else
676 93 v->halfpq = 0;
677
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 265 switch (v->quantizer_mode) {
678 265 case QUANT_FRAME_IMPLICIT:
679 265 v->pquantizer = pqindex < 9;
680 265 break;
681 ✗ case QUANT_NON_UNIFORM:
682 ✗ v->pquantizer = 0;
683 ✗ break;
684 ✗ case QUANT_FRAME_EXPLICIT:
685 ✗ v->pquantizer = get_bits1(gb);
686 ✗ break;
687 ✗ default:
688 ✗ v->pquantizer = 1;
689 ✗ break;
690 }
691 265 v->dquantfrm = 0;
692
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 265 if (v->extended_mv == 1)
693 ✗ v->mvrange = get_unary(gb, 0, 3);
694 265 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
695 265 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
696 265 v->range_x = 1 << (v->k_x - 1);
697 265 v->range_y = 1 << (v->k_y - 1);
698
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 265 if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
699 80 v->respic = get_bits(gb, 2);
700
701
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 265 if (v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)) {
702 ✗ v->x8_type = get_bits1(gb);
703 } else
704 265 v->x8_type = 0;
705 ff_dlog(v->s.avctx, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
706 (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'),
707 pqindex, v->pq, v->halfpq, v->rangeredfrm);
708
709
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 265 if (v->first_pic_header_flag)
710 183 rotate_luts(v);
711
712
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 265 switch (v->s.pict_type) {
713 164 case AV_PICTURE_TYPE_P:
714 164 v->tt_index = (v->pq > 4) + (v->pq > 12);
715
716 164 lowquant = (v->pq > 12) ? 0 : 1;
717 164 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
718
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 164 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
719 21 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
720 21 v->lumscale = get_bits(gb, 6);
721 21 v->lumshift = get_bits(gb, 6);
722 21 v->last_use_ic = 1;
723 /* fill lookup tables for intensity compensation */
724
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 5397 INIT_LUT(v->lumscale, v->lumshift, v->last_luty[0], v->last_lutuv[0], 1);
725
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 5397 INIT_LUT(v->lumscale, v->lumshift, v->last_luty[1], v->last_lutuv[1], 1);
726 }
727 164 v->qs_last = v->s.quarter_sample;
728
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 164 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
729
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 39 v->s.quarter_sample = (v->mv_mode2 != MV_PMODE_1MV_HPEL &&
730
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 18 v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
731 21 v->s.mspel = (v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
732 } else {
733
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 281 v->s.quarter_sample = (v->mv_mode != MV_PMODE_1MV_HPEL &&
734
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 138 v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
735 143 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
736 }
737
738
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 164 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
739
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 21 v->mv_mode2 == MV_PMODE_MIXED_MV) ||
740
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 164 v->mv_mode == MV_PMODE_MIXED_MV) {
741 12 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
742
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 12 if (status < 0)
743 ✗ return -1;
744 12 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
745 "Imode: %i, Invert: %i\n", status>>1, status&1);
746 } else {
747 152 v->mv_type_is_raw = 0;
748 152 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
749 }
750 164 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
751
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 164 if (status < 0)
752 ✗ return -1;
753 164 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
754 "Imode: %i, Invert: %i\n", status>>1, status&1);
755
756
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 164 if (get_bits_left(gb) < 4)
757 ✗ return AVERROR_INVALIDDATA;
758
759 /* Hopefully this is correct for P-frames */
760 164 v->mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
761 164 v->cbptab = get_bits(gb, 2);
762 164 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
763
764
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 164 if (v->dquant) {
765 128 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
766 128 vop_dquant_decoding(v);
767 }
768
769
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 164 if (v->vstransform) {
770 140 v->ttmbf = get_bits1(gb);
771
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 140 if (v->ttmbf) {
772 6 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
773 } else
774 134 v->ttfrm = 0; //FIXME Is that so ?
775 } else {
776 24 v->ttmbf = 1;
777 24 v->ttfrm = TT_8X8;
778 }
779 164 break;
780 11 case AV_PICTURE_TYPE_B:
781 11 v->tt_index = (v->pq > 4) + (v->pq > 12);
782
783 11 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
784 11 v->qs_last = v->s.quarter_sample;
785 11 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
786 11 v->s.mspel = v->s.quarter_sample;
787
788 11 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
789
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 11 if (status < 0)
790 ✗ return -1;
791 11 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
792 "Imode: %i, Invert: %i\n", status>>1, status&1);
793 11 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
794
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 11 if (status < 0)
795 ✗ return -1;
796 11 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
797 "Imode: %i, Invert: %i\n", status>>1, status&1);
798
799 11 v->mv_table_index = get_bits(gb, 2);
800 11 v->cbptab = get_bits(gb, 2);
801 11 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
802
803
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 11 if (v->dquant) {
804 ✗ av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
805 ✗ vop_dquant_decoding(v);
806 }
807
808
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 11 if (v->vstransform) {
809 11 v->ttmbf = get_bits1(gb);
810
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 11 if (v->ttmbf) {
811 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
812 } else
813 11 v->ttfrm = 0;
814 } else {
815 ✗ v->ttmbf = 1;
816 ✗ v->ttfrm = TT_8X8;
817 }
818 11 break;
819 }
820
821
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 265 if (!v->x8_type) {
822 /* AC Syntax */
823 265 v->c_ac_table_index = decode012(gb);
824
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
825 90 v->y_ac_table_index = decode012(gb);
826 }
827 /* DC Syntax */
828 265 v->dc_table_index = get_bits1(gb);
829 }
830
831
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 265 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
832 ✗ v->s.pict_type = AV_PICTURE_TYPE_B;
833 ✗ v->bi_type = 1;
834 }
835 265 return 0;
836 }
837
838 921 int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
839 {
840 int pqindex, lowquant;
841 int status;
842 int field_mode, fcm;
843
844 921 v->numref = 0;
845 921 v->p_frame_skipped = 0;
846
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 921 if (v->second_field) {
847
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 37 if (v->fcm != ILACE_FIELD || v->field_mode!=1)
848 ✗ return -1;
849
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 37 if (v->fptype & 4)
850
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 18 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
851 else
852
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 19 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
853 37 v->s.cur_pic.ptr->f->pict_type = v->s.pict_type;
854
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 37 if (!v->pic_header_flag)
855 37 goto parse_common_info;
856 }
857
858 884 field_mode = 0;
859
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 884 if (v->interlace) {
860 89 fcm = decode012(gb);
861
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 89 if (fcm) {
862
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 89 if (fcm == ILACE_FIELD)
863 73 field_mode = 1;
864 }
865 } else {
866 795 fcm = PROGRESSIVE;
867 }
868
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 884 if (!v->first_pic_header_flag && v->field_mode != field_mode)
869 ✗ return AVERROR_INVALIDDATA;
870 884 v->field_mode = field_mode;
871 884 v->fcm = fcm;
872
873
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 884 av_assert0( v->s.mb_height == v->s.height + 15 >> 4
874 || v->s.mb_height == FFALIGN(v->s.height + 15 >> 4, 2));
875
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 884 if (v->field_mode) {
876 73 v->s.mb_height = FFALIGN(v->s.height + 15 >> 4, 2);
877 73 v->fptype = get_bits(gb, 3);
878
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 73 if (v->fptype & 4) // B-picture
879
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 36 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
880 else
881
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 37 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
882 } else {
883 811 v->s.mb_height = v->s.height + 15 >> 4;
884
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 811 switch (get_unary(gb, 0, 4)) {
885 524 case 0:
886 524 v->s.pict_type = AV_PICTURE_TYPE_P;
887 524 break;
888 125 case 1:
889 125 v->s.pict_type = AV_PICTURE_TYPE_B;
890 125 break;
891 26 case 2:
892 26 v->s.pict_type = AV_PICTURE_TYPE_I;
893 26 break;
894 ✗ case 3:
895 ✗ v->s.pict_type = AV_PICTURE_TYPE_BI;
896 ✗ break;
897 136 case 4:
898 136 v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
899 136 v->p_frame_skipped = 1;
900 136 break;
901 }
902 }
903
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 884 if (v->tfcntrflag)
904 ✗ skip_bits(gb, 8);
905
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 884 if (v->broadcast) {
906
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 884 if (!v->interlace || v->psf) {
907 795 v->rptfrm = get_bits(gb, 2);
908 } else {
909 89 v->tff = get_bits1(gb);
910 89 v->rff = get_bits1(gb);
911 }
912 } else {
913 ✗ v->tff = 1;
914 }
915
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 884 if (v->panscanflag) {
916 ✗ avpriv_report_missing_feature(v->s.avctx, "Pan-scan");
917 //...
918 }
919
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 884 if (v->p_frame_skipped) {
920 136 return 0;
921 }
922 748 v->rnd = get_bits1(gb);
923
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 748 if (v->interlace)
924 89 v->uvsamp = get_bits1(gb);
925
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 748 if (v->field_mode) {
926
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 73 if (!v->refdist_flag)
927 ✗ v->refdist = 0;
928
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 73 else if ((v->s.pict_type != AV_PICTURE_TYPE_B) && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
929 37 v->refdist = get_bits(gb, 2);
930
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 37 if (v->refdist == 3)
931 ✗ v->refdist += get_unary(gb, 0, 14);
932
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 37 if (v->refdist > 16)
933 ✗ return AVERROR_INVALIDDATA;
934 }
935
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 73 if ((v->s.pict_type == AV_PICTURE_TYPE_B) || (v->s.pict_type == AV_PICTURE_TYPE_BI)) {
936
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 36 if (read_bfraction(v, gb) < 0)
937 ✗ return AVERROR_INVALIDDATA;
938 36 v->frfd = (v->bfraction * v->refdist) >> 8;
939 36 v->brfd = v->refdist - v->frfd - 1;
940
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 36 if (v->brfd < 0)
941 ✗ v->brfd = 0;
942 }
943 73 goto parse_common_info;
944 }
945
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 675 if (v->fcm == PROGRESSIVE) {
946
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 659 if (v->finterpflag)
947 ✗ v->interpfrm = get_bits1(gb);
948
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 659 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
949
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 116 if (read_bfraction(v, gb) < 0)
950 ✗ return AVERROR_INVALIDDATA;
951
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 116 if (v->bfraction == 0) {
952 ✗ v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
953 }
954 }
955 }
956
957 675 parse_common_info:
958
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 785 if (v->field_mode)
959 110 v->cur_field_type = !(v->tff ^ v->second_field);
960 785 pqindex = get_bits(gb, 5);
961
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 785 if (!pqindex)
962 ✗ return -1;
963
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 785 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
964 505 v->pq = ff_vc1_pquant_table[0][pqindex];
965 else
966 280 v->pq = ff_vc1_pquant_table[1][pqindex];
967 785 v->pqindex = pqindex;
968
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 785 if (pqindex < 9)
969 750 v->halfpq = get_bits1(gb);
970 else
971 35 v->halfpq = 0;
972
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 785 switch (v->quantizer_mode) {
973 505 case QUANT_FRAME_IMPLICIT:
974 505 v->pquantizer = pqindex < 9;
975 505 break;
976 ✗ case QUANT_NON_UNIFORM:
977 ✗ v->pquantizer = 0;
978 ✗ break;
979 ✗ case QUANT_FRAME_EXPLICIT:
980 ✗ v->pquantizer = get_bits1(gb);
981 ✗ break;
982 280 default:
983 280 v->pquantizer = 1;
984 280 break;
985 }
986 785 v->dquantfrm = 0;
987
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 785 if (v->postprocflag)
988 ✗ v->postproc = get_bits(gb, 2);
989
990
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 785 if (v->parse_only)
991 236 return 0;
992
993
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✓ Branch 1 taken 310 times.
 549 if (v->first_pic_header_flag)
994 239 rotate_luts(v);
995
996
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 549 switch (v->s.pict_type) {
997 20 case AV_PICTURE_TYPE_I:
998 case AV_PICTURE_TYPE_BI:
999
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 20 if (v->fcm == ILACE_FRAME) { //interlace frame picture
1000 2 status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
1001
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 2 if (status < 0)
1002 ✗ return -1;
1003 2 av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
1004 "Imode: %i, Invert: %i\n", status>>1, status&1);
1005 } else
1006 18 v->fieldtx_is_raw = 0;
1007 20 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
1008
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 20 if (status < 0)
1009 ✗ return -1;
1010 20 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
1011 "Imode: %i, Invert: %i\n", status>>1, status&1);
1012 20 v->condover = CONDOVER_NONE;
1013
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 20 if (v->overlap && v->pq <= 8) {
1014 14 v->condover = decode012(gb);
1015
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 14 if (v->condover == CONDOVER_SELECT) {
1016 4 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
1017
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 4 if (status < 0)
1018 ✗ return -1;
1019 4 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
1020 "Imode: %i, Invert: %i\n", status>>1, status&1);
1021 }
1022 }
1023 20 break;
1024 431 case AV_PICTURE_TYPE_P:
1025
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 431 if (v->field_mode) {
1026 36 v->numref = get_bits1(gb);
1027
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 36 if (!v->numref) {
1028 ✗ v->reffield = get_bits1(gb);
1029 ✗ v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
1030 }
1031 }
1032
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 431 if (v->extended_mv)
1033 66 v->mvrange = get_unary(gb, 0, 3);
1034 else
1035 365 v->mvrange = 0;
1036
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 431 if (v->interlace) {
1037
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 38 if (v->extended_dmv)
1038 ✗ v->dmvrange = get_unary(gb, 0, 3);
1039 else
1040 38 v->dmvrange = 0;
1041
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 38 if (v->fcm == ILACE_FRAME) { // interlaced frame picture
1042 2 v->fourmvswitch = get_bits1(gb);
1043 2 v->intcomp = get_bits1(gb);
1044
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 2 if (v->intcomp) {
1045 ✗ v->lumscale = get_bits(gb, 6);
1046 ✗ v->lumshift = get_bits(gb, 6);
1047 ✗ INIT_LUT(v->lumscale, v->lumshift, v->last_luty[0], v->last_lutuv[0], 1);
1048 ✗ INIT_LUT(v->lumscale, v->lumshift, v->last_luty[1], v->last_lutuv[1], 1);
1049 ✗ v->last_use_ic = 1;
1050 }
1051 2 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1052
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 2 if (status < 0)
1053 ✗ return -1;
1054 2 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
1055 "Imode: %i, Invert: %i\n", status>>1, status&1);
1056 2 v->mbmodetab = get_bits(gb, 2);
1057
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 2 if (v->fourmvswitch)
1058 2 v->mbmode_vlc = ff_vc1_intfr_4mv_mbmode_vlc[v->mbmodetab];
1059 else
1060 ✗ v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
1061 2 v->imvtab = get_bits(gb, 2);
1062 2 v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1063 // interlaced p-picture cbpcy range is [1, 63]
1064 2 v->icbptab = get_bits(gb, 3);
1065 2 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1066 2 v->twomvbptab = get_bits(gb, 2);
1067 2 v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
1068
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 2 if (v->fourmvswitch) {
1069 2 v->fourmvbptab = get_bits(gb, 2);
1070 2 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1071 }
1072 }
1073 }
1074 431 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1075 431 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1076 431 v->range_x = 1 << (v->k_x - 1);
1077 431 v->range_y = 1 << (v->k_y - 1);
1078
1079 431 v->tt_index = (v->pq > 4) + (v->pq > 12);
1080
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 431 if (v->fcm != ILACE_FRAME) {
1081 int mvmode;
1082 429 mvmode = get_unary(gb, 1, 4);
1083 429 lowquant = (v->pq > 12) ? 0 : 1;
1084 429 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
1085
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 429 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1086 int mvmode2;
1087 ✗ mvmode2 = get_unary(gb, 1, 3);
1088 ✗ v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
1089 ✗ if (v->field_mode) {
1090 ✗ v->intcompfield = decode210(gb) ^ 3;
1091 } else
1092 ✗ v->intcompfield = 3;
1093
1094 ✗ v->lumscale2 = v->lumscale = 32;
1095 ✗ v->lumshift2 = v->lumshift = 0;
1096 ✗ if (v->intcompfield & 1) {
1097 ✗ v->lumscale = get_bits(gb, 6);
1098 ✗ v->lumshift = get_bits(gb, 6);
1099 }
1100 ✗ if ((v->intcompfield & 2) && v->field_mode) {
1101 ✗ v->lumscale2 = get_bits(gb, 6);
1102 ✗ v->lumshift2 = get_bits(gb, 6);
1103 ✗ } else if(!v->field_mode) {
1104 ✗ v->lumscale2 = v->lumscale;
1105 ✗ v->lumshift2 = v->lumshift;
1106 }
1107 ✗ if (v->field_mode && v->second_field) {
1108 ✗ if (v->cur_field_type) {
1109 ✗ INIT_LUT(v->lumscale , v->lumshift , v->curr_luty[v->cur_field_type^1], v->curr_lutuv[v->cur_field_type^1], 0);
1110 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->last_luty[v->cur_field_type ], v->last_lutuv[v->cur_field_type ], 1);
1111 } else {
1112 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->curr_luty[v->cur_field_type^1], v->curr_lutuv[v->cur_field_type^1], 0);
1113 ✗ INIT_LUT(v->lumscale , v->lumshift , v->last_luty[v->cur_field_type ], v->last_lutuv[v->cur_field_type ], 1);
1114 }
1115 ✗ v->next_use_ic = *v->curr_use_ic = 1;
1116 } else {
1117 ✗ INIT_LUT(v->lumscale , v->lumshift , v->last_luty[0], v->last_lutuv[0], 1);
1118 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->last_luty[1], v->last_lutuv[1], 1);
1119 }
1120 ✗ v->last_use_ic = 1;
1121 }
1122 429 v->qs_last = v->s.quarter_sample;
1123
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 429 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1124 ✗ v->s.quarter_sample = (v->mv_mode2 != MV_PMODE_1MV_HPEL &&
1125 ✗ v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
1126 ✗ v->s.mspel = (v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
1127 } else {
1128
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✗ Branch 1 not taken.
 858 v->s.quarter_sample = (v->mv_mode != MV_PMODE_1MV_HPEL &&
1129
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✓ Branch 1 taken 4 times.
 429 v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1130 429 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1131 }
1132 }
1133
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 431 if (v->fcm == PROGRESSIVE) { // progressive
1134
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 393 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1135 ✗ v->mv_mode2 == MV_PMODE_MIXED_MV)
1136
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 393 || v->mv_mode == MV_PMODE_MIXED_MV) {
1137 333 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1138
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 333 if (status < 0)
1139 ✗ return -1;
1140 333 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1141 "Imode: %i, Invert: %i\n", status>>1, status&1);
1142 } else {
1143 60 v->mv_type_is_raw = 0;
1144 60 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1145 }
1146 393 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1147
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 393 if (status < 0)
1148 ✗ return -1;
1149 393 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1150 "Imode: %i, Invert: %i\n", status>>1, status&1);
1151
1152 /* Hopefully this is correct for P-frames */
1153 393 v->mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1154 393 v->cbptab = get_bits(gb, 2);
1155 393 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
1156
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 38 } else if (v->fcm == ILACE_FRAME) { // frame interlaced
1157 2 v->qs_last = v->s.quarter_sample;
1158 2 v->s.quarter_sample = 1;
1159 2 v->s.mspel = 1;
1160 } else { // field interlaced
1161 36 v->mbmodetab = get_bits(gb, 3);
1162 36 v->imvtab = get_bits(gb, 2 + v->numref);
1163
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 36 if (!v->numref)
1164 ✗ v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1165 else
1166 36 v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
1167 36 v->icbptab = get_bits(gb, 3);
1168 36 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1169
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 36 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1170
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 36 v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
1171 32 v->fourmvbptab = get_bits(gb, 2);
1172 32 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1173 32 v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
1174 } else {
1175 4 v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
1176 }
1177 }
1178
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 431 if (v->dquant) {
1179 6 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1180 6 vop_dquant_decoding(v);
1181 }
1182
1183
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 431 if (v->vstransform) {
1184 417 v->ttmbf = get_bits1(gb);
1185
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 417 if (v->ttmbf) {
1186 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1187 } else
1188 417 v->ttfrm = 0; //FIXME Is that so ?
1189 } else {
1190 14 v->ttmbf = 1;
1191 14 v->ttfrm = TT_8X8;
1192 }
1193 431 break;
1194 98 case AV_PICTURE_TYPE_B:
1195
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 98 if (v->fcm == ILACE_FRAME) {
1196
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 4 if (read_bfraction(v, gb) < 0)
1197 ✗ return AVERROR_INVALIDDATA;
1198
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 4 if (v->bfraction == 0) {
1199 ✗ return -1;
1200 }
1201 }
1202
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 98 if (v->extended_mv)
1203 70 v->mvrange = get_unary(gb, 0, 3);
1204 else
1205 28 v->mvrange = 0;
1206 98 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1207 98 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1208 98 v->range_x = 1 << (v->k_x - 1);
1209 98 v->range_y = 1 << (v->k_y - 1);
1210
1211 98 v->tt_index = (v->pq > 4) + (v->pq > 12);
1212
1213
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 98 if (v->field_mode) {
1214 int mvmode;
1215 36 av_log(v->s.avctx, AV_LOG_DEBUG, "B Fields\n");
1216
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 36 if (v->extended_dmv)
1217 ✗ v->dmvrange = get_unary(gb, 0, 3);
1218 36 mvmode = get_unary(gb, 1, 3);
1219 36 lowquant = (v->pq > 12) ? 0 : 1;
1220 36 v->mv_mode = ff_vc1_mv_pmode_table2[lowquant][mvmode];
1221 36 v->qs_last = v->s.quarter_sample;
1222
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 36 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
1223 36 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1224 36 status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
1225
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 36 if (status < 0)
1226 ✗ return -1;
1227 36 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
1228 "Imode: %i, Invert: %i\n", status>>1, status&1);
1229 36 v->mbmodetab = get_bits(gb, 3);
1230
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 36 if (v->mv_mode == MV_PMODE_MIXED_MV)
1231 28 v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
1232 else
1233 8 v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
1234 36 v->imvtab = get_bits(gb, 3);
1235 36 v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
1236 36 v->icbptab = get_bits(gb, 3);
1237 36 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1238
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 36 if (v->mv_mode == MV_PMODE_MIXED_MV) {
1239 28 v->fourmvbptab = get_bits(gb, 2);
1240 28 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1241 }
1242 36 v->numref = 1; // interlaced field B pictures are always 2-ref
1243
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 62 } else if (v->fcm == ILACE_FRAME) {
1244
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 4 if (v->extended_dmv)
1245 ✗ v->dmvrange = get_unary(gb, 0, 3);
1246
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 4 if (get_bits1(gb)) /* intcomp - present but shall always be 0 */
1247 ✗ av_log(v->s.avctx, AV_LOG_WARNING, "Intensity compensation set for B picture\n");
1248 4 v->intcomp = 0;
1249 4 v->mv_mode = MV_PMODE_1MV;
1250 4 v->fourmvswitch = 0;
1251 4 v->qs_last = v->s.quarter_sample;
1252 4 v->s.quarter_sample = 1;
1253 4 v->s.mspel = 1;
1254 4 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1255
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 4 if (status < 0)
1256 ✗ return -1;
1257 4 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1258 "Imode: %i, Invert: %i\n", status>>1, status&1);
1259 4 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1260
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 4 if (status < 0)
1261 ✗ return -1;
1262 4 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1263 "Imode: %i, Invert: %i\n", status>>1, status&1);
1264 4 v->mbmodetab = get_bits(gb, 2);
1265 4 v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
1266 4 v->imvtab = get_bits(gb, 2);
1267 4 v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1268 // interlaced p/b-picture cbpcy range is [1, 63]
1269 4 v->icbptab = get_bits(gb, 3);
1270 4 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1271 4 v->twomvbptab = get_bits(gb, 2);
1272 4 v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
1273 4 v->fourmvbptab = get_bits(gb, 2);
1274 4 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1275 } else {
1276 58 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1277 58 v->qs_last = v->s.quarter_sample;
1278 58 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1279 58 v->s.mspel = v->s.quarter_sample;
1280 58 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1281
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 58 if (status < 0)
1282 ✗ return -1;
1283 58 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1284 "Imode: %i, Invert: %i\n", status>>1, status&1);
1285 58 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1286
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 58 if (status < 0)
1287 ✗ return -1;
1288 58 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1289 "Imode: %i, Invert: %i\n", status>>1, status&1);
1290 58 v->mv_table_index = get_bits(gb, 2);
1291 58 v->cbptab = get_bits(gb, 2);
1292 58 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
1293 }
1294
1295
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 98 if (v->dquant) {
1296 12 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1297 12 vop_dquant_decoding(v);
1298 }
1299
1300
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 98 if (v->vstransform) {
1301 98 v->ttmbf = get_bits1(gb);
1302
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 98 if (v->ttmbf) {
1303 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1304 } else
1305 98 v->ttfrm = 0;
1306 } else {
1307 ✗ v->ttmbf = 1;
1308 ✗ v->ttfrm = TT_8X8;
1309 }
1310 98 break;
1311 }
1312
1313
1314 /* AC Syntax */
1315 549 v->c_ac_table_index = decode012(gb);
1316
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 549 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
1317 20 v->y_ac_table_index = decode012(gb);
1318 }
1319
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 529 else if (v->fcm != PROGRESSIVE && !v->s.quarter_sample) {
1320 12 v->range_x <<= 1;
1321 12 v->range_y <<= 1;
1322 }
1323
1324 /* DC Syntax */
1325 549 v->dc_table_index = get_bits1(gb);
1326
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 549 if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
1327
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 20 && v->dquant) {
1328 2 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1329 2 vop_dquant_decoding(v);
1330 }
1331
1332 549 v->bi_type = (v->s.pict_type == AV_PICTURE_TYPE_BI);
1333
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 549 if (v->bi_type)
1334 ✗ v->s.pict_type = AV_PICTURE_TYPE_B;
1335
1336 549 return 0;
1337 }
1338