FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vc1.c
Date: 2026-01-16 07:34:38
Exec Total Coverage
Lines: 693 863 80.3%
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 *const gb = &v->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->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->gb);
186
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 231 if (height & 1)
187 160 decode_rowskip(data + x, width - x, 1, stride, &v->gb);
188 }
189 250 break;
190 33 case IMODE_ROWSKIP:
191 33 decode_rowskip(data, width, height, stride, &v->gb);
192 33 break;
193 26 case IMODE_COLSKIP:
194 26 decode_colskip(data, width, height, stride, &v->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 *const gb = &v->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->loop_filter = get_bits1(gb); //common
304
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 7 if (v->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->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->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->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->loop_filter = get_bits1(gb);
505
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 65 if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
506 ✗ v->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->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
616 266 int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
617 {
618 int pqindex, lowquant, status;
619
620 266 v->field_mode = 0;
621 266 v->fcm = PROGRESSIVE;
622
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 266 if (v->finterpflag)
623 ✗ v->interpfrm = get_bits1(gb);
624
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 266 if (v->s.avctx->codec_id == AV_CODEC_ID_MSS2)
625 83 v->respic =
626 83 v->rangered =
627 83 v->multires = get_bits(gb, 2) == 1;
628 else
629 183 skip_bits(gb, 2); //framecnt unused
630 266 v->rangeredfrm = 0;
631
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 266 if (v->rangered)
632 55 v->rangeredfrm = get_bits1(gb);
633
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 266 if (get_bits1(gb)) {
634 164 v->s.pict_type = AV_PICTURE_TYPE_P;
635 } else {
636
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 102 if (v->s.avctx->max_b_frames && !get_bits1(gb)) {
637 11 v->s.pict_type = AV_PICTURE_TYPE_B;
638 } else
639 91 v->s.pict_type = AV_PICTURE_TYPE_I;
640 }
641
642 266 v->bi_type = 0;
643
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 266 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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 266 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
651 91 skip_bits(gb, 7); // skip buffer fullness
652
653
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 266 if (v->parse_only)
654 ✗ return 0;
655
656 /* calculate RND */
657
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 266 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
658 91 v->rnd = 1;
659
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 266 if (v->s.pict_type == AV_PICTURE_TYPE_P)
660 164 v->rnd ^= 1;
661
662
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 266 if (get_bits_left(gb) < 5)
663 ✗ return AVERROR_INVALIDDATA;
664 /* Quantizer stuff */
665 266 pqindex = get_bits(gb, 5);
666
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 266 if (!pqindex)
667 ✗ return -1;
668
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 266 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
669 266 v->pq = ff_vc1_pquant_table[0][pqindex];
670 else
671 ✗ v->pq = ff_vc1_pquant_table[1][pqindex];
672 266 v->pqindex = pqindex;
673
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 266 if (pqindex < 9)
674 172 v->halfpq = get_bits1(gb);
675 else
676 94 v->halfpq = 0;
677
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 266 switch (v->quantizer_mode) {
678 266 case QUANT_FRAME_IMPLICIT:
679 266 v->pquantizer = pqindex < 9;
680 266 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 }
691 266 v->dquantfrm = 0;
692
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 266 if (v->extended_mv == 1)
693 ✗ v->mvrange = get_unary(gb, 0, 3);
694 266 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
695 266 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
696 266 v->range_x = 1 << (v->k_x - 1);
697 266 v->range_y = 1 << (v->k_y - 1);
698
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 266 if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
699 81 v->respic = get_bits(gb, 2);
700
701
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 266 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
704 266 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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 266 if (v->first_pic_header_flag)
710 183 rotate_luts(v);
711
712
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 266 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
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 164 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
728
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 39 v->s.quarter_sample = (v->mv_mode2 != MV_PMODE_1MV_HPEL &&
729
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 18 v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
730 21 v->s.mspel = (v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
731 } else {
732
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 281 v->s.quarter_sample = (v->mv_mode != MV_PMODE_1MV_HPEL &&
733
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 138 v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
734 143 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
735 }
736
737
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 164 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
738
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 21 v->mv_mode2 == MV_PMODE_MIXED_MV) ||
739
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 164 v->mv_mode == MV_PMODE_MIXED_MV) {
740 12 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
741
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 12 if (status < 0)
742 ✗ return -1;
743 12 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
744 "Imode: %i, Invert: %i\n", status>>1, status&1);
745 } else {
746 152 v->mv_type_is_raw = 0;
747 152 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
748 }
749 164 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
750
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 164 if (status < 0)
751 ✗ return -1;
752 164 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
753 "Imode: %i, Invert: %i\n", status>>1, status&1);
754
755
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 164 if (get_bits_left(gb) < 4)
756 ✗ return AVERROR_INVALIDDATA;
757
758 /* Hopefully this is correct for P-frames */
759 164 v->mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
760 164 v->cbptab = get_bits(gb, 2);
761 164 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
762
763
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 164 if (v->dquant) {
764 128 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
765 128 vop_dquant_decoding(v);
766 }
767
768
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 164 if (v->vstransform) {
769 140 v->ttmbf = get_bits1(gb);
770
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 140 if (v->ttmbf) {
771 6 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
772 } else
773 134 v->ttfrm = 0; //FIXME Is that so ?
774 } else {
775 24 v->ttmbf = 1;
776 24 v->ttfrm = TT_8X8;
777 }
778 164 break;
779 11 case AV_PICTURE_TYPE_B:
780 11 v->tt_index = (v->pq > 4) + (v->pq > 12);
781
782 11 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
783 11 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
784 11 v->s.mspel = v->s.quarter_sample;
785
786 11 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
787
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 11 if (status < 0)
788 ✗ return -1;
789 11 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
790 "Imode: %i, Invert: %i\n", status>>1, status&1);
791 11 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
792
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 11 if (status < 0)
793 ✗ return -1;
794 11 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
795 "Imode: %i, Invert: %i\n", status>>1, status&1);
796
797 11 v->mv_table_index = get_bits(gb, 2);
798 11 v->cbptab = get_bits(gb, 2);
799 11 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
800
801
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 11 if (v->dquant) {
802 ✗ av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
803 ✗ vop_dquant_decoding(v);
804 }
805
806
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 11 if (v->vstransform) {
807 11 v->ttmbf = get_bits1(gb);
808
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 11 if (v->ttmbf) {
809 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
810 } else
811 11 v->ttfrm = 0;
812 } else {
813 ✗ v->ttmbf = 1;
814 ✗ v->ttfrm = TT_8X8;
815 }
816 11 break;
817 }
818
819
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 266 if (!v->x8_type) {
820 /* AC Syntax */
821 266 v->c_ac_table_index = decode012(gb);
822
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 266 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
823 91 v->y_ac_table_index = decode012(gb);
824 }
825 /* DC Syntax */
826 266 v->dc_table_index = get_bits1(gb);
827 }
828
829
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 266 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
830 ✗ v->s.pict_type = AV_PICTURE_TYPE_B;
831 ✗ v->bi_type = 1;
832 }
833 266 return 0;
834 }
835
836 921 int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
837 {
838 int pqindex, lowquant;
839 int status;
840 int field_mode, fcm;
841
842 921 v->numref = 0;
843 921 v->p_frame_skipped = 0;
844
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 921 if (v->second_field) {
845
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 37 if (v->fcm != ILACE_FIELD || v->field_mode!=1)
846 ✗ return -1;
847
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 37 if (v->fptype & 4)
848
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 18 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
849 else
850
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 19 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
851 37 v->s.cur_pic.ptr->f->pict_type = v->s.pict_type;
852
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 37 if (!v->pic_header_flag)
853 37 goto parse_common_info;
854 }
855
856 884 field_mode = 0;
857
2/2
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 884 if (v->interlace) {
858 89 fcm = decode012(gb);
859
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 89 if (fcm) {
860
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 89 if (fcm == ILACE_FIELD)
861 73 field_mode = 1;
862 }
863 } else {
864 795 fcm = PROGRESSIVE;
865 }
866
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 884 if (!v->first_pic_header_flag && v->field_mode != field_mode)
867 ✗ return AVERROR_INVALIDDATA;
868 884 v->field_mode = field_mode;
869 884 v->fcm = fcm;
870
871
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 884 av_assert0( v->s.mb_height == v->s.height + 15 >> 4
872 || v->s.mb_height == FFALIGN(v->s.height + 15 >> 4, 2));
873
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 884 if (v->field_mode) {
874 73 v->s.mb_height = FFALIGN(v->s.height + 15 >> 4, 2);
875 73 v->fptype = get_bits(gb, 3);
876
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 73 if (v->fptype & 4) // B-picture
877
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✓ Branch 1 taken 36 times.
 36 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
878 else
879
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 37 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
880 } else {
881 811 v->s.mb_height = v->s.height + 15 >> 4;
882
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✗ Branch 6 not taken.
 811 switch (get_unary(gb, 0, 4)) {
883 524 case 0:
884 524 v->s.pict_type = AV_PICTURE_TYPE_P;
885 524 break;
886 125 case 1:
887 125 v->s.pict_type = AV_PICTURE_TYPE_B;
888 125 break;
889 26 case 2:
890 26 v->s.pict_type = AV_PICTURE_TYPE_I;
891 26 break;
892 ✗ case 3:
893 ✗ v->s.pict_type = AV_PICTURE_TYPE_BI;
894 ✗ break;
895 136 case 4:
896 136 v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
897 136 v->p_frame_skipped = 1;
898 136 break;
899 }
900 }
901
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 884 if (v->tfcntrflag)
902 ✗ skip_bits(gb, 8);
903
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 884 if (v->broadcast) {
904
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 884 if (!v->interlace || v->psf) {
905 795 v->rptfrm = get_bits(gb, 2);
906 } else {
907 89 v->tff = get_bits1(gb);
908 89 v->rff = get_bits1(gb);
909 }
910 } else {
911 ✗ v->tff = 1;
912 }
913
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 884 if (v->panscanflag) {
914 ✗ avpriv_report_missing_feature(v->s.avctx, "Pan-scan");
915 //...
916 }
917
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 884 if (v->p_frame_skipped) {
918 136 return 0;
919 }
920 748 v->rnd = get_bits1(gb);
921
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 748 if (v->interlace)
922 89 v->uvsamp = get_bits1(gb);
923
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✓ Branch 1 taken 675 times.
 748 if (v->field_mode) {
924
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 73 if (!v->refdist_flag)
925 ✗ v->refdist = 0;
926
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 73 else if ((v->s.pict_type != AV_PICTURE_TYPE_B) && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
927 37 v->refdist = get_bits(gb, 2);
928
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 37 if (v->refdist == 3)
929 ✗ v->refdist += get_unary(gb, 0, 14);
930
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 37 if (v->refdist > 16)
931 ✗ return AVERROR_INVALIDDATA;
932 }
933
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 73 if ((v->s.pict_type == AV_PICTURE_TYPE_B) || (v->s.pict_type == AV_PICTURE_TYPE_BI)) {
934
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 36 if (read_bfraction(v, gb) < 0)
935 ✗ return AVERROR_INVALIDDATA;
936 36 v->frfd = (v->bfraction * v->refdist) >> 8;
937 36 v->brfd = v->refdist - v->frfd - 1;
938
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 36 if (v->brfd < 0)
939 ✗ v->brfd = 0;
940 }
941 73 goto parse_common_info;
942 }
943
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 675 if (v->fcm == PROGRESSIVE) {
944
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 659 if (v->finterpflag)
945 ✗ v->interpfrm = get_bits1(gb);
946
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 659 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
947
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 116 if (read_bfraction(v, gb) < 0)
948 ✗ return AVERROR_INVALIDDATA;
949
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 116 if (v->bfraction == 0) {
950 ✗ v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
951 }
952 }
953 }
954
955 675 parse_common_info:
956
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 785 if (v->field_mode)
957 110 v->cur_field_type = !(v->tff ^ v->second_field);
958 785 pqindex = get_bits(gb, 5);
959
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 785 if (!pqindex)
960 ✗ return -1;
961
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 785 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
962 505 v->pq = ff_vc1_pquant_table[0][pqindex];
963 else
964 280 v->pq = ff_vc1_pquant_table[1][pqindex];
965 785 v->pqindex = pqindex;
966
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 785 if (pqindex < 9)
967 750 v->halfpq = get_bits1(gb);
968 else
969 35 v->halfpq = 0;
970
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 785 switch (v->quantizer_mode) {
971 505 case QUANT_FRAME_IMPLICIT:
972 505 v->pquantizer = pqindex < 9;
973 505 break;
974 ✗ case QUANT_NON_UNIFORM:
975 ✗ v->pquantizer = 0;
976 ✗ break;
977 ✗ case QUANT_FRAME_EXPLICIT:
978 ✗ v->pquantizer = get_bits1(gb);
979 ✗ break;
980 280 default:
981 280 v->pquantizer = 1;
982 280 break;
983 }
984 785 v->dquantfrm = 0;
985
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 785 if (v->postprocflag)
986 ✗ v->postproc = get_bits(gb, 2);
987
988
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 785 if (v->parse_only)
989 236 return 0;
990
991
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✓ Branch 1 taken 310 times.
 549 if (v->first_pic_header_flag)
992 239 rotate_luts(v);
993
994
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 549 switch (v->s.pict_type) {
995 20 case AV_PICTURE_TYPE_I:
996 case AV_PICTURE_TYPE_BI:
997
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 20 if (v->fcm == ILACE_FRAME) { //interlace frame picture
998 2 status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
999
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 2 if (status < 0)
1000 ✗ return -1;
1001 2 av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
1002 "Imode: %i, Invert: %i\n", status>>1, status&1);
1003 } else
1004 18 v->fieldtx_is_raw = 0;
1005 20 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
1006
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 20 if (status < 0)
1007 ✗ return -1;
1008 20 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
1009 "Imode: %i, Invert: %i\n", status>>1, status&1);
1010 20 v->condover = CONDOVER_NONE;
1011
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 20 if (v->overlap && v->pq <= 8) {
1012 14 v->condover = decode012(gb);
1013
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 14 if (v->condover == CONDOVER_SELECT) {
1014 4 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
1015
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 4 if (status < 0)
1016 ✗ return -1;
1017 4 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
1018 "Imode: %i, Invert: %i\n", status>>1, status&1);
1019 }
1020 }
1021 20 break;
1022 431 case AV_PICTURE_TYPE_P:
1023
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 431 if (v->field_mode) {
1024 36 v->numref = get_bits1(gb);
1025
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 36 if (!v->numref) {
1026 ✗ v->reffield = get_bits1(gb);
1027 ✗ v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
1028 }
1029 }
1030
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 431 if (v->extended_mv)
1031 66 v->mvrange = get_unary(gb, 0, 3);
1032 else
1033 365 v->mvrange = 0;
1034
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 431 if (v->interlace) {
1035
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 38 if (v->extended_dmv)
1036 ✗ v->dmvrange = get_unary(gb, 0, 3);
1037 else
1038 38 v->dmvrange = 0;
1039
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 38 if (v->fcm == ILACE_FRAME) { // interlaced frame picture
1040 2 v->fourmvswitch = get_bits1(gb);
1041 2 v->intcomp = get_bits1(gb);
1042
1/2
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 2 if (v->intcomp) {
1043 ✗ v->lumscale = get_bits(gb, 6);
1044 ✗ v->lumshift = get_bits(gb, 6);
1045 ✗ INIT_LUT(v->lumscale, v->lumshift, v->last_luty[0], v->last_lutuv[0], 1);
1046 ✗ INIT_LUT(v->lumscale, v->lumshift, v->last_luty[1], v->last_lutuv[1], 1);
1047 ✗ v->last_use_ic = 1;
1048 }
1049 2 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1050
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 2 if (status < 0)
1051 ✗ return -1;
1052 2 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
1053 "Imode: %i, Invert: %i\n", status>>1, status&1);
1054 2 v->mbmodetab = get_bits(gb, 2);
1055
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 2 if (v->fourmvswitch)
1056 2 v->mbmode_vlc = ff_vc1_intfr_4mv_mbmode_vlc[v->mbmodetab];
1057 else
1058 ✗ v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
1059 2 v->imvtab = get_bits(gb, 2);
1060 2 v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1061 // interlaced p-picture cbpcy range is [1, 63]
1062 2 v->icbptab = get_bits(gb, 3);
1063 2 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1064 2 v->twomvbptab = get_bits(gb, 2);
1065 2 v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
1066
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 2 if (v->fourmvswitch) {
1067 2 v->fourmvbptab = get_bits(gb, 2);
1068 2 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1069 }
1070 }
1071 }
1072 431 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1073 431 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1074 431 v->range_x = 1 << (v->k_x - 1);
1075 431 v->range_y = 1 << (v->k_y - 1);
1076
1077 431 v->tt_index = (v->pq > 4) + (v->pq > 12);
1078
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 431 if (v->fcm != ILACE_FRAME) {
1079 int mvmode;
1080 429 mvmode = get_unary(gb, 1, 4);
1081 429 lowquant = (v->pq > 12) ? 0 : 1;
1082 429 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
1083
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 429 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1084 int mvmode2;
1085 ✗ mvmode2 = get_unary(gb, 1, 3);
1086 ✗ v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
1087 ✗ if (v->field_mode) {
1088 ✗ v->intcompfield = decode210(gb) ^ 3;
1089 } else
1090 ✗ v->intcompfield = 3;
1091
1092 ✗ v->lumscale2 = v->lumscale = 32;
1093 ✗ v->lumshift2 = v->lumshift = 0;
1094 ✗ if (v->intcompfield & 1) {
1095 ✗ v->lumscale = get_bits(gb, 6);
1096 ✗ v->lumshift = get_bits(gb, 6);
1097 }
1098 ✗ if ((v->intcompfield & 2) && v->field_mode) {
1099 ✗ v->lumscale2 = get_bits(gb, 6);
1100 ✗ v->lumshift2 = get_bits(gb, 6);
1101 ✗ } else if(!v->field_mode) {
1102 ✗ v->lumscale2 = v->lumscale;
1103 ✗ v->lumshift2 = v->lumshift;
1104 }
1105 ✗ if (v->field_mode && v->second_field) {
1106 ✗ if (v->cur_field_type) {
1107 ✗ INIT_LUT(v->lumscale , v->lumshift , v->curr_luty[v->cur_field_type^1], v->curr_lutuv[v->cur_field_type^1], 0);
1108 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->last_luty[v->cur_field_type ], v->last_lutuv[v->cur_field_type ], 1);
1109 } else {
1110 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->curr_luty[v->cur_field_type^1], v->curr_lutuv[v->cur_field_type^1], 0);
1111 ✗ INIT_LUT(v->lumscale , v->lumshift , v->last_luty[v->cur_field_type ], v->last_lutuv[v->cur_field_type ], 1);
1112 }
1113 ✗ v->next_use_ic = *v->curr_use_ic = 1;
1114 } else {
1115 ✗ INIT_LUT(v->lumscale , v->lumshift , v->last_luty[0], v->last_lutuv[0], 1);
1116 ✗ INIT_LUT(v->lumscale2, v->lumshift2, v->last_luty[1], v->last_lutuv[1], 1);
1117 }
1118 ✗ v->last_use_ic = 1;
1119 }
1120
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 429 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1121 ✗ v->s.quarter_sample = (v->mv_mode2 != MV_PMODE_1MV_HPEL &&
1122 ✗ v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
1123 ✗ v->s.mspel = (v->mv_mode2 != MV_PMODE_1MV_HPEL_BILIN);
1124 } else {
1125
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✗ Branch 1 not taken.
 858 v->s.quarter_sample = (v->mv_mode != MV_PMODE_1MV_HPEL &&
1126
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✓ Branch 1 taken 4 times.
 429 v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1127 429 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1128 }
1129 }
1130
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 431 if (v->fcm == PROGRESSIVE) { // progressive
1131
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 393 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1132 ✗ v->mv_mode2 == MV_PMODE_MIXED_MV)
1133
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 393 || v->mv_mode == MV_PMODE_MIXED_MV) {
1134 333 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1135
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 333 if (status < 0)
1136 ✗ return -1;
1137 333 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1138 "Imode: %i, Invert: %i\n", status>>1, status&1);
1139 } else {
1140 60 v->mv_type_is_raw = 0;
1141 60 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1142 }
1143 393 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1144
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 393 if (status < 0)
1145 ✗ return -1;
1146 393 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1147 "Imode: %i, Invert: %i\n", status>>1, status&1);
1148
1149 /* Hopefully this is correct for P-frames */
1150 393 v->mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1151 393 v->cbptab = get_bits(gb, 2);
1152 393 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
1153
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 38 } else if (v->fcm == ILACE_FRAME) { // frame interlaced
1154 2 v->s.quarter_sample = 1;
1155 2 v->s.mspel = 1;
1156 } else { // field interlaced
1157 36 v->mbmodetab = get_bits(gb, 3);
1158 36 v->imvtab = get_bits(gb, 2 + v->numref);
1159
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 36 if (!v->numref)
1160 ✗ v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1161 else
1162 36 v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
1163 36 v->icbptab = get_bits(gb, 3);
1164 36 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1165
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 36 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1166
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 36 v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
1167 32 v->fourmvbptab = get_bits(gb, 2);
1168 32 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1169 32 v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
1170 } else {
1171 4 v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
1172 }
1173 }
1174
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 431 if (v->dquant) {
1175 6 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1176 6 vop_dquant_decoding(v);
1177 }
1178
1179
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 431 if (v->vstransform) {
1180 417 v->ttmbf = get_bits1(gb);
1181
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 417 if (v->ttmbf) {
1182 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1183 } else
1184 417 v->ttfrm = 0; //FIXME Is that so ?
1185 } else {
1186 14 v->ttmbf = 1;
1187 14 v->ttfrm = TT_8X8;
1188 }
1189 431 break;
1190 98 case AV_PICTURE_TYPE_B:
1191
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 98 if (v->fcm == ILACE_FRAME) {
1192
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 4 if (read_bfraction(v, gb) < 0)
1193 ✗ return AVERROR_INVALIDDATA;
1194
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 4 if (v->bfraction == 0) {
1195 ✗ return -1;
1196 }
1197 }
1198
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 98 if (v->extended_mv)
1199 70 v->mvrange = get_unary(gb, 0, 3);
1200 else
1201 28 v->mvrange = 0;
1202 98 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1203 98 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1204 98 v->range_x = 1 << (v->k_x - 1);
1205 98 v->range_y = 1 << (v->k_y - 1);
1206
1207 98 v->tt_index = (v->pq > 4) + (v->pq > 12);
1208
1209
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 98 if (v->field_mode) {
1210 int mvmode;
1211 36 av_log(v->s.avctx, AV_LOG_DEBUG, "B Fields\n");
1212
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 36 if (v->extended_dmv)
1213 ✗ v->dmvrange = get_unary(gb, 0, 3);
1214 36 mvmode = get_unary(gb, 1, 3);
1215 36 lowquant = (v->pq > 12) ? 0 : 1;
1216 36 v->mv_mode = ff_vc1_mv_pmode_table2[lowquant][mvmode];
1217
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 36 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
1218 36 v->s.mspel = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
1219 36 status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
1220
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 36 if (status < 0)
1221 ✗ return -1;
1222 36 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
1223 "Imode: %i, Invert: %i\n", status>>1, status&1);
1224 36 v->mbmodetab = get_bits(gb, 3);
1225
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 36 if (v->mv_mode == MV_PMODE_MIXED_MV)
1226 28 v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
1227 else
1228 8 v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
1229 36 v->imvtab = get_bits(gb, 3);
1230 36 v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
1231 36 v->icbptab = get_bits(gb, 3);
1232 36 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1233
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 36 if (v->mv_mode == MV_PMODE_MIXED_MV) {
1234 28 v->fourmvbptab = get_bits(gb, 2);
1235 28 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1236 }
1237 36 v->numref = 1; // interlaced field B pictures are always 2-ref
1238
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 62 } else if (v->fcm == ILACE_FRAME) {
1239
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 4 if (v->extended_dmv)
1240 ✗ v->dmvrange = get_unary(gb, 0, 3);
1241
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 4 if (get_bits1(gb)) /* intcomp - present but shall always be 0 */
1242 ✗ av_log(v->s.avctx, AV_LOG_WARNING, "Intensity compensation set for B picture\n");
1243 4 v->intcomp = 0;
1244 4 v->mv_mode = MV_PMODE_1MV;
1245 4 v->fourmvswitch = 0;
1246 4 v->s.quarter_sample = 1;
1247 4 v->s.mspel = 1;
1248 4 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1249
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 4 if (status < 0)
1250 ✗ return -1;
1251 4 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1252 "Imode: %i, Invert: %i\n", status>>1, status&1);
1253 4 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1254
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 4 if (status < 0)
1255 ✗ return -1;
1256 4 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1257 "Imode: %i, Invert: %i\n", status>>1, status&1);
1258 4 v->mbmodetab = get_bits(gb, 2);
1259 4 v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
1260 4 v->imvtab = get_bits(gb, 2);
1261 4 v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
1262 // interlaced p/b-picture cbpcy range is [1, 63]
1263 4 v->icbptab = get_bits(gb, 3);
1264 4 v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
1265 4 v->twomvbptab = get_bits(gb, 2);
1266 4 v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
1267 4 v->fourmvbptab = get_bits(gb, 2);
1268 4 v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
1269 } else {
1270 58 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1271 58 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1272 58 v->s.mspel = v->s.quarter_sample;
1273 58 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1274
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 58 if (status < 0)
1275 ✗ return -1;
1276 58 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1277 "Imode: %i, Invert: %i\n", status>>1, status&1);
1278 58 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1279
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 58 if (status < 0)
1280 ✗ return -1;
1281 58 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1282 "Imode: %i, Invert: %i\n", status>>1, status&1);
1283 58 v->mv_table_index = get_bits(gb, 2);
1284 58 v->cbptab = get_bits(gb, 2);
1285 58 v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
1286 }
1287
1288
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 98 if (v->dquant) {
1289 12 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1290 12 vop_dquant_decoding(v);
1291 }
1292
1293
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 98 if (v->vstransform) {
1294 98 v->ttmbf = get_bits1(gb);
1295
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 98 if (v->ttmbf) {
1296 ✗ v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1297 } else
1298 98 v->ttfrm = 0;
1299 } else {
1300 ✗ v->ttmbf = 1;
1301 ✗ v->ttfrm = TT_8X8;
1302 }
1303 98 break;
1304 }
1305
1306
1307 /* AC Syntax */
1308 549 v->c_ac_table_index = decode012(gb);
1309
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 549 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
1310 20 v->y_ac_table_index = decode012(gb);
1311 }
1312
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 529 else if (v->fcm != PROGRESSIVE && !v->s.quarter_sample) {
1313 12 v->range_x <<= 1;
1314 12 v->range_y <<= 1;
1315 }
1316
1317 /* DC Syntax */
1318 549 v->dc_table_index = get_bits1(gb);
1319
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 549 if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
1320
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 20 && v->dquant) {
1321 2 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1322 2 vop_dquant_decoding(v);
1323 }
1324
1325 549 v->bi_type = (v->s.pict_type == AV_PICTURE_TYPE_BI);
1326
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 549 if (v->bi_type)
1327 ✗ v->s.pict_type = AV_PICTURE_TYPE_B;
1328
1329 549 return 0;
1330 }
1331