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1 | /* |
2 | * MPEG-1/2 decoder | |
3 | * Copyright (c) 2000, 2001 Fabrice Bellard | |
4 | * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * MPEG-1/2 decoder | |
26 | */ | |
27 | ||
28 | #define UNCHECKED_BITSTREAM_READER 1 | |
29 | #include <inttypes.h> | |
30 | ||
31 | #include "libavutil/attributes.h" | |
32 | #include "libavutil/internal.h" | |
33 | #include "libavutil/stereo3d.h" | |
34 | ||
35 | #include "avcodec.h" | |
36 | #include "bytestream.h" | |
37 | #include "error_resilience.h" | |
38 | #include "idctdsp.h" | |
39 | #include "internal.h" | |
40 | #include "mpeg_er.h" | |
41 | #include "mpeg12.h" | |
42 | #include "mpeg12data.h" | |
43 | #include "mpegutils.h" | |
44 | #include "mpegvideo.h" | |
45 | #include "thread.h" | |
46 | #include "version.h" | |
47 | #include "vdpau_internal.h" | |
48 | #include "xvmc_internal.h" | |
49 | ||
50 | typedef struct Mpeg1Context { | |
51 | MpegEncContext mpeg_enc_ctx; | |
52 | int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ | |
53 | int repeat_field; /* true if we must repeat the field */ | |
54 | AVPanScan pan_scan; /* some temporary storage for the panscan */ | |
55 | AVStereo3D stereo3d; | |
56 | int has_stereo3d; | |
57 | uint8_t *a53_caption; | |
58 | int a53_caption_size; | |
59 | uint8_t afd; | |
60 | int has_afd; | |
61 | int slice_count; | |
62 | int save_aspect_info; | |
63 | int save_width, save_height, save_progressive_seq; | |
64 | AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */ | |
65 | int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */ | |
66 | int tmpgexs; | |
67 | int first_slice; | |
68 | int extradata_decoded; | |
69 | } Mpeg1Context; | |
70 | ||
71 | #define MB_TYPE_ZERO_MV 0x20000000 | |
72 | ||
73 | static const uint32_t ptype2mb_type[7] = { | |
74 | MB_TYPE_INTRA, | |
75 | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, | |
76 | MB_TYPE_L0, | |
77 | MB_TYPE_L0 | MB_TYPE_CBP, | |
78 | MB_TYPE_QUANT | MB_TYPE_INTRA, | |
79 | MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16, | |
80 | MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, | |
81 | }; | |
82 | ||
83 | static const uint32_t btype2mb_type[11] = { | |
84 | MB_TYPE_INTRA, | |
85 | MB_TYPE_L1, | |
86 | MB_TYPE_L1 | MB_TYPE_CBP, | |
87 | MB_TYPE_L0, | |
88 | MB_TYPE_L0 | MB_TYPE_CBP, | |
89 | MB_TYPE_L0L1, | |
90 | MB_TYPE_L0L1 | MB_TYPE_CBP, | |
91 | MB_TYPE_QUANT | MB_TYPE_INTRA, | |
92 | MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP, | |
93 | MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP, | |
94 | MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP, | |
95 | }; | |
96 | ||
97 | static const uint8_t non_linear_qscale[32] = { | |
98 | 0, 1, 2, 3, 4, 5, 6, 7, | |
99 | 8, 10, 12, 14, 16, 18, 20, 22, | |
100 | 24, 28, 32, 36, 40, 44, 48, 52, | |
101 | 56, 64, 72, 80, 88, 96, 104, 112, | |
102 | }; | |
103 | ||
104 | /* as H.263, but only 17 codes */ | |
105 | static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) | |
106 | { | |
107 | int code, sign, val, shift; | |
108 | ||
109 | code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2); | |
110 | if (code == 0) | |
111 | return pred; | |
112 | if (code < 0) | |
113 | return 0xffff; | |
114 | ||
115 | sign = get_bits1(&s->gb); | |
116 | shift = fcode - 1; | |
117 | val = code; | |
118 | if (shift) { | |
119 | val = (val - 1) << shift; | |
120 | val |= get_bits(&s->gb, shift); | |
121 | val++; | |
122 | } | |
123 | if (sign) | |
124 | val = -val; | |
125 | val += pred; | |
126 | ||
127 | /* modulo decoding */ | |
128 | return sign_extend(val, 5 + shift); | |
129 | } | |
130 | ||
131 | #define check_scantable_index(ctx, x) \ | |
132 | do { \ | |
133 | if ((x) > 63) { \ | |
134 | av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \ | |
135 | ctx->mb_x, ctx->mb_y); \ | |
136 | return AVERROR_INVALIDDATA; \ | |
137 | } \ | |
138 | } while (0) | |
139 | ||
140 | static inline int mpeg1_decode_block_intra(MpegEncContext *s, | |
141 | int16_t *block, int n) | |
142 | { | |
143 | int level, dc, diff, i, j, run; | |
144 | int component; | |
145 | RLTable *rl = &ff_rl_mpeg1; | |
146 | uint8_t *const scantable = s->intra_scantable.permutated; | |
147 | const uint16_t *quant_matrix = s->intra_matrix; | |
148 | const int qscale = s->qscale; | |
149 | ||
150 | /* DC coefficient */ | |
151 | component = (n <= 3 ? 0 : n - 4 + 1); | |
152 | diff = decode_dc(&s->gb, component); | |
153 | if (diff >= 0xffff) | |
154 | return -1; | |
155 | dc = s->last_dc[component]; | |
156 | dc += diff; | |
157 | s->last_dc[component] = dc; | |
158 | block[0] = dc * quant_matrix[0]; | |
159 | av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff); | |
160 | i = 0; | |
161 | { | |
162 | OPEN_READER(re, &s->gb); | |
163 | UPDATE_CACHE(re, &s->gb); | |
164 | if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) | |
165 | goto end; | |
166 | ||
167 | /* now quantify & encode AC coefficients */ | |
168 | for (;;) { | |
169 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
170 | TEX_VLC_BITS, 2, 0); | |
171 | ||
172 | if (level != 0) { | |
173 | i += run; | |
174 | check_scantable_index(s, i); | |
175 | j = scantable[i]; | |
176 | level = (level * qscale * quant_matrix[j]) >> 4; | |
177 | level = (level - 1) | 1; | |
178 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
179 | SHOW_SBITS(re, &s->gb, 1); | |
180 | SKIP_BITS(re, &s->gb, 1); | |
181 | } else { | |
182 | /* escape */ | |
183 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
184 | LAST_SKIP_BITS(re, &s->gb, 6); | |
185 | UPDATE_CACHE(re, &s->gb); | |
186 | level = SHOW_SBITS(re, &s->gb, 8); | |
187 | SKIP_BITS(re, &s->gb, 8); | |
188 | if (level == -128) { | |
189 | level = SHOW_UBITS(re, &s->gb, 8) - 256; | |
190 | SKIP_BITS(re, &s->gb, 8); | |
191 | } else if (level == 0) { | |
192 | level = SHOW_UBITS(re, &s->gb, 8); | |
193 | SKIP_BITS(re, &s->gb, 8); | |
194 | } | |
195 | i += run; | |
196 | check_scantable_index(s, i); | |
197 | j = scantable[i]; | |
198 | if (level < 0) { | |
199 | level = -level; | |
200 | level = (level * qscale * quant_matrix[j]) >> 4; | |
201 | level = (level - 1) | 1; | |
202 | level = -level; | |
203 | } else { | |
204 | level = (level * qscale * quant_matrix[j]) >> 4; | |
205 | level = (level - 1) | 1; | |
206 | } | |
207 | } | |
208 | ||
209 | block[j] = level; | |
210 | if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) | |
211 | break; | |
212 | ||
213 | UPDATE_CACHE(re, &s->gb); | |
214 | } | |
215 | end: | |
216 | LAST_SKIP_BITS(re, &s->gb, 2); | |
217 | CLOSE_READER(re, &s->gb); | |
218 | } | |
219 | s->block_last_index[n] = i; | |
220 | return 0; | |
221 | } | |
222 | ||
223 | int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n) | |
224 | { | |
225 | return mpeg1_decode_block_intra(s, block, n); | |
226 | } | |
227 | ||
228 | static inline int mpeg1_decode_block_inter(MpegEncContext *s, | |
229 | int16_t *block, int n) | |
230 | { | |
231 | int level, i, j, run; | |
232 | RLTable *rl = &ff_rl_mpeg1; | |
233 | uint8_t *const scantable = s->intra_scantable.permutated; | |
234 | const uint16_t *quant_matrix = s->inter_matrix; | |
235 | const int qscale = s->qscale; | |
236 | ||
237 | { | |
238 | OPEN_READER(re, &s->gb); | |
239 | i = -1; | |
240 | // special case for first coefficient, no need to add second VLC table | |
241 | UPDATE_CACHE(re, &s->gb); | |
242 | if (((int32_t) GET_CACHE(re, &s->gb)) < 0) { | |
243 | level = (3 * qscale * quant_matrix[0]) >> 5; | |
244 | level = (level - 1) | 1; | |
245 | if (GET_CACHE(re, &s->gb) & 0x40000000) | |
246 | level = -level; | |
247 | block[0] = level; | |
248 | i++; | |
249 | SKIP_BITS(re, &s->gb, 2); | |
250 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
251 | goto end; | |
252 | } | |
253 | /* now quantify & encode AC coefficients */ | |
254 | for (;;) { | |
255 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
256 | TEX_VLC_BITS, 2, 0); | |
257 | ||
258 | if (level != 0) { | |
259 | i += run; | |
260 | check_scantable_index(s, i); | |
261 | j = scantable[i]; | |
262 | level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
263 | level = (level - 1) | 1; | |
264 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
265 | SHOW_SBITS(re, &s->gb, 1); | |
266 | SKIP_BITS(re, &s->gb, 1); | |
267 | } else { | |
268 | /* escape */ | |
269 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
270 | LAST_SKIP_BITS(re, &s->gb, 6); | |
271 | UPDATE_CACHE(re, &s->gb); | |
272 | level = SHOW_SBITS(re, &s->gb, 8); | |
273 | SKIP_BITS(re, &s->gb, 8); | |
274 | if (level == -128) { | |
275 | level = SHOW_UBITS(re, &s->gb, 8) - 256; | |
276 | SKIP_BITS(re, &s->gb, 8); | |
277 | } else if (level == 0) { | |
278 | level = SHOW_UBITS(re, &s->gb, 8); | |
279 | SKIP_BITS(re, &s->gb, 8); | |
280 | } | |
281 | i += run; | |
282 | check_scantable_index(s, i); | |
283 | j = scantable[i]; | |
284 | if (level < 0) { | |
285 | level = -level; | |
286 | level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
287 | level = (level - 1) | 1; | |
288 | level = -level; | |
289 | } else { | |
290 | level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
291 | level = (level - 1) | 1; | |
292 | } | |
293 | } | |
294 | ||
295 | block[j] = level; | |
296 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
297 | break; | |
298 | UPDATE_CACHE(re, &s->gb); | |
299 | } | |
300 | end: | |
301 | LAST_SKIP_BITS(re, &s->gb, 2); | |
302 | CLOSE_READER(re, &s->gb); | |
303 | } | |
304 | s->block_last_index[n] = i; | |
305 | return 0; | |
306 | } | |
307 | ||
308 | /** | |
309 | * Note: this function can read out of range and crash for corrupt streams. | |
310 | * Changing this would eat up any speed benefits it has. | |
311 | * Do not use "fast" flag if you need the code to be robust. | |
312 | */ | |
313 | static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, | |
314 | int16_t *block, int n) | |
315 | { | |
316 | int level, i, j, run; | |
317 | RLTable *rl = &ff_rl_mpeg1; | |
318 | uint8_t *const scantable = s->intra_scantable.permutated; | |
319 | const int qscale = s->qscale; | |
320 | ||
321 | { | |
322 | OPEN_READER(re, &s->gb); | |
323 | i = -1; | |
324 | // Special case for first coefficient, no need to add second VLC table. | |
325 | UPDATE_CACHE(re, &s->gb); | |
326 | if (((int32_t) GET_CACHE(re, &s->gb)) < 0) { | |
327 | level = (3 * qscale) >> 1; | |
328 | level = (level - 1) | 1; | |
329 | if (GET_CACHE(re, &s->gb) & 0x40000000) | |
330 | level = -level; | |
331 | block[0] = level; | |
332 | i++; | |
333 | SKIP_BITS(re, &s->gb, 2); | |
334 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
335 | goto end; | |
336 | } | |
337 | ||
338 | /* now quantify & encode AC coefficients */ | |
339 | for (;;) { | |
340 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
341 | TEX_VLC_BITS, 2, 0); | |
342 | ||
343 | if (level != 0) { | |
344 | i += run; | |
345 | check_scantable_index(s, i); | |
346 | j = scantable[i]; | |
347 | level = ((level * 2 + 1) * qscale) >> 1; | |
348 | level = (level - 1) | 1; | |
349 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
350 | SHOW_SBITS(re, &s->gb, 1); | |
351 | SKIP_BITS(re, &s->gb, 1); | |
352 | } else { | |
353 | /* escape */ | |
354 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
355 | LAST_SKIP_BITS(re, &s->gb, 6); | |
356 | UPDATE_CACHE(re, &s->gb); | |
357 | level = SHOW_SBITS(re, &s->gb, 8); | |
358 | SKIP_BITS(re, &s->gb, 8); | |
359 | if (level == -128) { | |
360 | level = SHOW_UBITS(re, &s->gb, 8) - 256; | |
361 | SKIP_BITS(re, &s->gb, 8); | |
362 | } else if (level == 0) { | |
363 | level = SHOW_UBITS(re, &s->gb, 8); | |
364 | SKIP_BITS(re, &s->gb, 8); | |
365 | } | |
366 | i += run; | |
367 | check_scantable_index(s, i); | |
368 | j = scantable[i]; | |
369 | if (level < 0) { | |
370 | level = -level; | |
371 | level = ((level * 2 + 1) * qscale) >> 1; | |
372 | level = (level - 1) | 1; | |
373 | level = -level; | |
374 | } else { | |
375 | level = ((level * 2 + 1) * qscale) >> 1; | |
376 | level = (level - 1) | 1; | |
377 | } | |
378 | } | |
379 | ||
380 | block[j] = level; | |
381 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
382 | break; | |
383 | UPDATE_CACHE(re, &s->gb); | |
384 | } | |
385 | end: | |
386 | LAST_SKIP_BITS(re, &s->gb, 2); | |
387 | CLOSE_READER(re, &s->gb); | |
388 | } | |
389 | s->block_last_index[n] = i; | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, | |
394 | int16_t *block, int n) | |
395 | { | |
396 | int level, i, j, run; | |
397 | RLTable *rl = &ff_rl_mpeg1; | |
398 | uint8_t *const scantable = s->intra_scantable.permutated; | |
399 | const uint16_t *quant_matrix; | |
400 | const int qscale = s->qscale; | |
401 | int mismatch; | |
402 | ||
403 | mismatch = 1; | |
404 | ||
405 | { | |
406 | OPEN_READER(re, &s->gb); | |
407 | i = -1; | |
408 | if (n < 4) | |
409 | quant_matrix = s->inter_matrix; | |
410 | else | |
411 | quant_matrix = s->chroma_inter_matrix; | |
412 | ||
413 | // Special case for first coefficient, no need to add second VLC table. | |
414 | UPDATE_CACHE(re, &s->gb); | |
415 | if (((int32_t) GET_CACHE(re, &s->gb)) < 0) { | |
416 | level = (3 * qscale * quant_matrix[0]) >> 5; | |
417 | if (GET_CACHE(re, &s->gb) & 0x40000000) | |
418 | level = -level; | |
419 | block[0] = level; | |
420 | mismatch ^= level; | |
421 | i++; | |
422 | SKIP_BITS(re, &s->gb, 2); | |
423 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
424 | goto end; | |
425 | } | |
426 | ||
427 | /* now quantify & encode AC coefficients */ | |
428 | for (;;) { | |
429 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
430 | TEX_VLC_BITS, 2, 0); | |
431 | ||
432 | if (level != 0) { | |
433 | i += run; | |
434 | check_scantable_index(s, i); | |
435 | j = scantable[i]; | |
436 | level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
437 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
438 | SHOW_SBITS(re, &s->gb, 1); | |
439 | SKIP_BITS(re, &s->gb, 1); | |
440 | } else { | |
441 | /* escape */ | |
442 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
443 | LAST_SKIP_BITS(re, &s->gb, 6); | |
444 | UPDATE_CACHE(re, &s->gb); | |
445 | level = SHOW_SBITS(re, &s->gb, 12); | |
446 | SKIP_BITS(re, &s->gb, 12); | |
447 | ||
448 | i += run; | |
449 | check_scantable_index(s, i); | |
450 | j = scantable[i]; | |
451 | if (level < 0) { | |
452 | level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
453 | level = -level; | |
454 | } else { | |
455 | level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; | |
456 | } | |
457 | } | |
458 | ||
459 | mismatch ^= level; | |
460 | block[j] = level; | |
461 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
462 | break; | |
463 | UPDATE_CACHE(re, &s->gb); | |
464 | } | |
465 | end: | |
466 | LAST_SKIP_BITS(re, &s->gb, 2); | |
467 | CLOSE_READER(re, &s->gb); | |
468 | } | |
469 | block[63] ^= (mismatch & 1); | |
470 | ||
471 | s->block_last_index[n] = i; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | /** | |
476 | * Note: this function can read out of range and crash for corrupt streams. | |
477 | * Changing this would eat up any speed benefits it has. | |
478 | * Do not use "fast" flag if you need the code to be robust. | |
479 | */ | |
480 | static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, | |
481 | int16_t *block, int n) | |
482 | { | |
483 | int level, i, j, run; | |
484 | RLTable *rl = &ff_rl_mpeg1; | |
485 | uint8_t *const scantable = s->intra_scantable.permutated; | |
486 | const int qscale = s->qscale; | |
487 | OPEN_READER(re, &s->gb); | |
488 | i = -1; | |
489 | ||
490 | // special case for first coefficient, no need to add second VLC table | |
491 | UPDATE_CACHE(re, &s->gb); | |
492 | if (((int32_t) GET_CACHE(re, &s->gb)) < 0) { | |
493 | level = (3 * qscale) >> 1; | |
494 | if (GET_CACHE(re, &s->gb) & 0x40000000) | |
495 | level = -level; | |
496 | block[0] = level; | |
497 | i++; | |
498 | SKIP_BITS(re, &s->gb, 2); | |
499 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF) | |
500 | goto end; | |
501 | } | |
502 | ||
503 | /* now quantify & encode AC coefficients */ | |
504 | for (;;) { | |
505 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); | |
506 | ||
507 | if (level != 0) { | |
508 | i += run; | |
509 | j = scantable[i]; | |
510 | level = ((level * 2 + 1) * qscale) >> 1; | |
511 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
512 | SHOW_SBITS(re, &s->gb, 1); | |
513 | SKIP_BITS(re, &s->gb, 1); | |
514 | } else { | |
515 | /* escape */ | |
516 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
517 | LAST_SKIP_BITS(re, &s->gb, 6); | |
518 | UPDATE_CACHE(re, &s->gb); | |
519 | level = SHOW_SBITS(re, &s->gb, 12); | |
520 | SKIP_BITS(re, &s->gb, 12); | |
521 | ||
522 | i += run; | |
523 | j = scantable[i]; | |
524 | if (level < 0) { | |
525 | level = ((-level * 2 + 1) * qscale) >> 1; | |
526 | level = -level; | |
527 | } else { | |
528 | level = ((level * 2 + 1) * qscale) >> 1; | |
529 | } | |
530 | } | |
531 | ||
532 | block[j] = level; | |
533 | if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63) | |
534 | break; | |
535 | ||
536 | UPDATE_CACHE(re, &s->gb); | |
537 | } | |
538 | end: | |
539 | LAST_SKIP_BITS(re, &s->gb, 2); | |
540 | CLOSE_READER(re, &s->gb); | |
541 | s->block_last_index[n] = i; | |
542 | return 0; | |
543 | } | |
544 | ||
545 | static inline int mpeg2_decode_block_intra(MpegEncContext *s, | |
546 | int16_t *block, int n) | |
547 | { | |
548 | int level, dc, diff, i, j, run; | |
549 | int component; | |
550 | RLTable *rl; | |
551 | uint8_t *const scantable = s->intra_scantable.permutated; | |
552 | const uint16_t *quant_matrix; | |
553 | const int qscale = s->qscale; | |
554 | int mismatch; | |
555 | ||
556 | /* DC coefficient */ | |
557 | if (n < 4) { | |
558 | quant_matrix = s->intra_matrix; | |
559 | component = 0; | |
560 | } else { | |
561 | quant_matrix = s->chroma_intra_matrix; | |
562 | component = (n & 1) + 1; | |
563 | } | |
564 | diff = decode_dc(&s->gb, component); | |
565 | if (diff >= 0xffff) | |
566 | return -1; | |
567 | dc = s->last_dc[component]; | |
568 | dc += diff; | |
569 | s->last_dc[component] = dc; | |
570 | block[0] = dc << (3 - s->intra_dc_precision); | |
571 | av_dlog(s->avctx, "dc=%d\n", block[0]); | |
572 | mismatch = block[0] ^ 1; | |
573 | i = 0; | |
574 | if (s->intra_vlc_format) | |
575 | rl = &ff_rl_mpeg2; | |
576 | else | |
577 | rl = &ff_rl_mpeg1; | |
578 | ||
579 | { | |
580 | OPEN_READER(re, &s->gb); | |
581 | /* now quantify & encode AC coefficients */ | |
582 | for (;;) { | |
583 | UPDATE_CACHE(re, &s->gb); | |
584 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
585 | TEX_VLC_BITS, 2, 0); | |
586 | ||
587 | if (level == 127) { | |
588 | break; | |
589 | } else if (level != 0) { | |
590 | i += run; | |
591 | check_scantable_index(s, i); | |
592 | j = scantable[i]; | |
593 | level = (level * qscale * quant_matrix[j]) >> 4; | |
594 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
595 | SHOW_SBITS(re, &s->gb, 1); | |
596 | LAST_SKIP_BITS(re, &s->gb, 1); | |
597 | } else { | |
598 | /* escape */ | |
599 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
600 | LAST_SKIP_BITS(re, &s->gb, 6); | |
601 | UPDATE_CACHE(re, &s->gb); | |
602 | level = SHOW_SBITS(re, &s->gb, 12); | |
603 | SKIP_BITS(re, &s->gb, 12); | |
604 | i += run; | |
605 | check_scantable_index(s, i); | |
606 | j = scantable[i]; | |
607 | if (level < 0) { | |
608 | level = (-level * qscale * quant_matrix[j]) >> 4; | |
609 | level = -level; | |
610 | } else { | |
611 | level = (level * qscale * quant_matrix[j]) >> 4; | |
612 | } | |
613 | } | |
614 | ||
615 | mismatch ^= level; | |
616 | block[j] = level; | |
617 | } | |
618 | CLOSE_READER(re, &s->gb); | |
619 | } | |
620 | block[63] ^= mismatch & 1; | |
621 | ||
622 | s->block_last_index[n] = i; | |
623 | return 0; | |
624 | } | |
625 | ||
626 | /** | |
627 | * Note: this function can read out of range and crash for corrupt streams. | |
628 | * Changing this would eat up any speed benefits it has. | |
629 | * Do not use "fast" flag if you need the code to be robust. | |
630 | */ | |
631 | static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, | |
632 | int16_t *block, int n) | |
633 | { | |
634 | int level, dc, diff, i, j, run; | |
635 | int component; | |
636 | RLTable *rl; | |
637 | uint8_t *const scantable = s->intra_scantable.permutated; | |
638 | const uint16_t *quant_matrix; | |
639 | const int qscale = s->qscale; | |
640 | ||
641 | /* DC coefficient */ | |
642 | if (n < 4) { | |
643 | quant_matrix = s->intra_matrix; | |
644 | component = 0; | |
645 | } else { | |
646 | quant_matrix = s->chroma_intra_matrix; | |
647 | component = (n & 1) + 1; | |
648 | } | |
649 | diff = decode_dc(&s->gb, component); | |
650 | if (diff >= 0xffff) | |
651 | return -1; | |
652 | dc = s->last_dc[component]; | |
653 | dc += diff; | |
654 | s->last_dc[component] = dc; | |
655 | block[0] = dc << (3 - s->intra_dc_precision); | |
656 | i = 0; | |
657 | if (s->intra_vlc_format) | |
658 | rl = &ff_rl_mpeg2; | |
659 | else | |
660 | rl = &ff_rl_mpeg1; | |
661 | ||
662 | { | |
663 | OPEN_READER(re, &s->gb); | |
664 | /* now quantify & encode AC coefficients */ | |
665 | for (;;) { | |
666 | UPDATE_CACHE(re, &s->gb); | |
667 | GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], | |
668 | TEX_VLC_BITS, 2, 0); | |
669 | ||
670 | if (level >= 64 || i > 63) { | |
671 | break; | |
672 | } else if (level != 0) { | |
673 | i += run; | |
674 | j = scantable[i]; | |
675 | level = (level * qscale * quant_matrix[j]) >> 4; | |
676 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - | |
677 | SHOW_SBITS(re, &s->gb, 1); | |
678 | LAST_SKIP_BITS(re, &s->gb, 1); | |
679 | } else { | |
680 | /* escape */ | |
681 | run = SHOW_UBITS(re, &s->gb, 6) + 1; | |
682 | LAST_SKIP_BITS(re, &s->gb, 6); | |
683 | UPDATE_CACHE(re, &s->gb); | |
684 | level = SHOW_SBITS(re, &s->gb, 12); | |
685 | SKIP_BITS(re, &s->gb, 12); | |
686 | i += run; | |
687 | j = scantable[i]; | |
688 | if (level < 0) { | |
689 | level = (-level * qscale * quant_matrix[j]) >> 4; | |
690 | level = -level; | |
691 | } else { | |
692 | level = (level * qscale * quant_matrix[j]) >> 4; | |
693 | } | |
694 | } | |
695 | ||
696 | block[j] = level; | |
697 | } | |
698 | CLOSE_READER(re, &s->gb); | |
699 | } | |
700 | ||
701 | s->block_last_index[n] = i; | |
702 | return 0; | |
703 | } | |
704 | ||
705 | /******************************************/ | |
706 | /* decoding */ | |
707 | ||
708 | static inline int get_dmv(MpegEncContext *s) | |
709 | { | |
710 | if (get_bits1(&s->gb)) | |
711 | return 1 - (get_bits1(&s->gb) << 1); | |
712 | else | |
713 | return 0; | |
714 | } | |
715 | ||
716 | static inline int get_qscale(MpegEncContext *s) | |
717 | { | |
718 | int qscale = get_bits(&s->gb, 5); | |
719 | if (s->q_scale_type) | |
720 | return non_linear_qscale[qscale]; | |
721 | else | |
722 | return qscale << 1; | |
723 | } | |
724 | ||
725 | ||
726 | /* motion type (for MPEG-2) */ | |
727 | #define MT_FIELD 1 | |
728 | #define MT_FRAME 2 | |
729 | #define MT_16X8 2 | |
730 | #define MT_DMV 3 | |
731 | ||
732 | static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64]) | |
733 | { | |
734 | int i, j, k, cbp, val, mb_type, motion_type; | |
735 | const int mb_block_count = 4 + (1 << s->chroma_format); | |
f6fa7814 | 736 | int ret; |
2ba45a60 DM |
737 | |
738 | av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); | |
739 | ||
740 | av_assert2(s->mb_skipped == 0); | |
741 | ||
742 | if (s->mb_skip_run-- != 0) { | |
743 | if (s->pict_type == AV_PICTURE_TYPE_P) { | |
744 | s->mb_skipped = 1; | |
745 | s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = | |
746 | MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; | |
747 | } else { | |
748 | int mb_type; | |
749 | ||
750 | if (s->mb_x) | |
751 | mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1]; | |
752 | else | |
753 | // FIXME not sure if this is allowed in MPEG at all | |
754 | mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; | |
755 | if (IS_INTRA(mb_type)) { | |
756 | av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n"); | |
f6fa7814 | 757 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
758 | } |
759 | s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = | |
760 | mb_type | MB_TYPE_SKIP; | |
761 | ||
762 | if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0) | |
763 | s->mb_skipped = 1; | |
764 | } | |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
769 | switch (s->pict_type) { | |
770 | default: | |
771 | case AV_PICTURE_TYPE_I: | |
772 | if (get_bits1(&s->gb) == 0) { | |
773 | if (get_bits1(&s->gb) == 0) { | |
774 | av_log(s->avctx, AV_LOG_ERROR, | |
775 | "invalid mb type in I Frame at %d %d\n", | |
776 | s->mb_x, s->mb_y); | |
f6fa7814 | 777 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
778 | } |
779 | mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; | |
780 | } else { | |
781 | mb_type = MB_TYPE_INTRA; | |
782 | } | |
783 | break; | |
784 | case AV_PICTURE_TYPE_P: | |
785 | mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); | |
786 | if (mb_type < 0) { | |
787 | av_log(s->avctx, AV_LOG_ERROR, | |
788 | "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); | |
f6fa7814 | 789 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
790 | } |
791 | mb_type = ptype2mb_type[mb_type]; | |
792 | break; | |
793 | case AV_PICTURE_TYPE_B: | |
794 | mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); | |
795 | if (mb_type < 0) { | |
796 | av_log(s->avctx, AV_LOG_ERROR, | |
797 | "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); | |
f6fa7814 | 798 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
799 | } |
800 | mb_type = btype2mb_type[mb_type]; | |
801 | break; | |
802 | } | |
803 | av_dlog(s->avctx, "mb_type=%x\n", mb_type); | |
804 | // motion_type = 0; /* avoid warning */ | |
805 | if (IS_INTRA(mb_type)) { | |
806 | s->bdsp.clear_blocks(s->block[0]); | |
807 | ||
808 | if (!s->chroma_y_shift) | |
809 | s->bdsp.clear_blocks(s->block[6]); | |
810 | ||
811 | /* compute DCT type */ | |
812 | // FIXME: add an interlaced_dct coded var? | |
813 | if (s->picture_structure == PICT_FRAME && | |
814 | !s->frame_pred_frame_dct) | |
815 | s->interlaced_dct = get_bits1(&s->gb); | |
816 | ||
817 | if (IS_QUANT(mb_type)) | |
818 | s->qscale = get_qscale(s); | |
819 | ||
820 | if (s->concealment_motion_vectors) { | |
821 | /* just parse them */ | |
822 | if (s->picture_structure != PICT_FRAME) | |
823 | skip_bits1(&s->gb); /* field select */ | |
824 | ||
825 | s->mv[0][0][0] = | |
826 | s->last_mv[0][0][0] = | |
827 | s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0], | |
828 | s->last_mv[0][0][0]); | |
829 | s->mv[0][0][1] = | |
830 | s->last_mv[0][0][1] = | |
831 | s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1], | |
832 | s->last_mv[0][0][1]); | |
833 | ||
834 | skip_bits1(&s->gb); /* marker */ | |
835 | } else { | |
836 | /* reset mv prediction */ | |
837 | memset(s->last_mv, 0, sizeof(s->last_mv)); | |
838 | } | |
839 | s->mb_intra = 1; | |
840 | // if 1, we memcpy blocks in xvmcvideo | |
841 | if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) | |
842 | ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks | |
843 | ||
844 | if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { | |
845 | if (s->flags2 & CODEC_FLAG2_FAST) { | |
846 | for (i = 0; i < 6; i++) | |
847 | mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i); | |
848 | } else { | |
849 | for (i = 0; i < mb_block_count; i++) | |
f6fa7814 DM |
850 | if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0) |
851 | return ret; | |
2ba45a60 DM |
852 | } |
853 | } else { | |
854 | for (i = 0; i < 6; i++) | |
f6fa7814 DM |
855 | if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0) |
856 | return ret; | |
2ba45a60 DM |
857 | } |
858 | } else { | |
859 | if (mb_type & MB_TYPE_ZERO_MV) { | |
860 | av_assert2(mb_type & MB_TYPE_CBP); | |
861 | ||
862 | s->mv_dir = MV_DIR_FORWARD; | |
863 | if (s->picture_structure == PICT_FRAME) { | |
864 | if (s->picture_structure == PICT_FRAME | |
865 | && !s->frame_pred_frame_dct) | |
866 | s->interlaced_dct = get_bits1(&s->gb); | |
867 | s->mv_type = MV_TYPE_16X16; | |
868 | } else { | |
869 | s->mv_type = MV_TYPE_FIELD; | |
870 | mb_type |= MB_TYPE_INTERLACED; | |
871 | s->field_select[0][0] = s->picture_structure - 1; | |
872 | } | |
873 | ||
874 | if (IS_QUANT(mb_type)) | |
875 | s->qscale = get_qscale(s); | |
876 | ||
877 | s->last_mv[0][0][0] = 0; | |
878 | s->last_mv[0][0][1] = 0; | |
879 | s->last_mv[0][1][0] = 0; | |
880 | s->last_mv[0][1][1] = 0; | |
881 | s->mv[0][0][0] = 0; | |
882 | s->mv[0][0][1] = 0; | |
883 | } else { | |
884 | av_assert2(mb_type & MB_TYPE_L0L1); | |
885 | // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED | |
886 | /* get additional motion vector type */ | |
887 | if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) { | |
888 | motion_type = MT_FRAME; | |
889 | } else { | |
890 | motion_type = get_bits(&s->gb, 2); | |
891 | if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type)) | |
892 | s->interlaced_dct = get_bits1(&s->gb); | |
893 | } | |
894 | ||
895 | if (IS_QUANT(mb_type)) | |
896 | s->qscale = get_qscale(s); | |
897 | ||
898 | /* motion vectors */ | |
899 | s->mv_dir = (mb_type >> 13) & 3; | |
900 | av_dlog(s->avctx, "motion_type=%d\n", motion_type); | |
901 | switch (motion_type) { | |
902 | case MT_FRAME: /* or MT_16X8 */ | |
903 | if (s->picture_structure == PICT_FRAME) { | |
904 | mb_type |= MB_TYPE_16x16; | |
905 | s->mv_type = MV_TYPE_16X16; | |
906 | for (i = 0; i < 2; i++) { | |
907 | if (USES_LIST(mb_type, i)) { | |
908 | /* MT_FRAME */ | |
909 | s->mv[i][0][0] = | |
910 | s->last_mv[i][0][0] = | |
911 | s->last_mv[i][1][0] = | |
912 | mpeg_decode_motion(s, s->mpeg_f_code[i][0], | |
913 | s->last_mv[i][0][0]); | |
914 | s->mv[i][0][1] = | |
915 | s->last_mv[i][0][1] = | |
916 | s->last_mv[i][1][1] = | |
917 | mpeg_decode_motion(s, s->mpeg_f_code[i][1], | |
918 | s->last_mv[i][0][1]); | |
919 | /* full_pel: only for MPEG-1 */ | |
920 | if (s->full_pel[i]) { | |
921 | s->mv[i][0][0] <<= 1; | |
922 | s->mv[i][0][1] <<= 1; | |
923 | } | |
924 | } | |
925 | } | |
926 | } else { | |
927 | mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; | |
928 | s->mv_type = MV_TYPE_16X8; | |
929 | for (i = 0; i < 2; i++) { | |
930 | if (USES_LIST(mb_type, i)) { | |
931 | /* MT_16X8 */ | |
932 | for (j = 0; j < 2; j++) { | |
933 | s->field_select[i][j] = get_bits1(&s->gb); | |
934 | for (k = 0; k < 2; k++) { | |
935 | val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], | |
936 | s->last_mv[i][j][k]); | |
937 | s->last_mv[i][j][k] = val; | |
938 | s->mv[i][j][k] = val; | |
939 | } | |
940 | } | |
941 | } | |
942 | } | |
943 | } | |
944 | break; | |
945 | case MT_FIELD: | |
946 | s->mv_type = MV_TYPE_FIELD; | |
947 | if (s->picture_structure == PICT_FRAME) { | |
948 | mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; | |
949 | for (i = 0; i < 2; i++) { | |
950 | if (USES_LIST(mb_type, i)) { | |
951 | for (j = 0; j < 2; j++) { | |
952 | s->field_select[i][j] = get_bits1(&s->gb); | |
953 | val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], | |
954 | s->last_mv[i][j][0]); | |
955 | s->last_mv[i][j][0] = val; | |
956 | s->mv[i][j][0] = val; | |
957 | av_dlog(s->avctx, "fmx=%d\n", val); | |
958 | val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], | |
959 | s->last_mv[i][j][1] >> 1); | |
960 | s->last_mv[i][j][1] = val << 1; | |
961 | s->mv[i][j][1] = val; | |
962 | av_dlog(s->avctx, "fmy=%d\n", val); | |
963 | } | |
964 | } | |
965 | } | |
966 | } else { | |
967 | av_assert0(!s->progressive_sequence); | |
968 | mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; | |
969 | for (i = 0; i < 2; i++) { | |
970 | if (USES_LIST(mb_type, i)) { | |
971 | s->field_select[i][0] = get_bits1(&s->gb); | |
972 | for (k = 0; k < 2; k++) { | |
973 | val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], | |
974 | s->last_mv[i][0][k]); | |
975 | s->last_mv[i][0][k] = val; | |
976 | s->last_mv[i][1][k] = val; | |
977 | s->mv[i][0][k] = val; | |
978 | } | |
979 | } | |
980 | } | |
981 | } | |
982 | break; | |
983 | case MT_DMV: | |
984 | if (s->progressive_sequence){ | |
985 | av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n"); | |
f6fa7814 | 986 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
987 | } |
988 | s->mv_type = MV_TYPE_DMV; | |
989 | for (i = 0; i < 2; i++) { | |
990 | if (USES_LIST(mb_type, i)) { | |
991 | int dmx, dmy, mx, my, m; | |
992 | const int my_shift = s->picture_structure == PICT_FRAME; | |
993 | ||
994 | mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], | |
995 | s->last_mv[i][0][0]); | |
996 | s->last_mv[i][0][0] = mx; | |
997 | s->last_mv[i][1][0] = mx; | |
998 | dmx = get_dmv(s); | |
999 | my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], | |
1000 | s->last_mv[i][0][1] >> my_shift); | |
1001 | dmy = get_dmv(s); | |
1002 | ||
1003 | ||
1004 | s->last_mv[i][0][1] = my << my_shift; | |
1005 | s->last_mv[i][1][1] = my << my_shift; | |
1006 | ||
1007 | s->mv[i][0][0] = mx; | |
1008 | s->mv[i][0][1] = my; | |
1009 | s->mv[i][1][0] = mx; // not used | |
1010 | s->mv[i][1][1] = my; // not used | |
1011 | ||
1012 | if (s->picture_structure == PICT_FRAME) { | |
1013 | mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; | |
1014 | ||
1015 | // m = 1 + 2 * s->top_field_first; | |
1016 | m = s->top_field_first ? 1 : 3; | |
1017 | ||
1018 | /* top -> top pred */ | |
1019 | s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; | |
1020 | s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; | |
1021 | m = 4 - m; | |
1022 | s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; | |
1023 | s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; | |
1024 | } else { | |
1025 | mb_type |= MB_TYPE_16x16; | |
1026 | ||
1027 | s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; | |
1028 | s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; | |
1029 | if (s->picture_structure == PICT_TOP_FIELD) | |
1030 | s->mv[i][2][1]--; | |
1031 | else | |
1032 | s->mv[i][2][1]++; | |
1033 | } | |
1034 | } | |
1035 | } | |
1036 | break; | |
1037 | default: | |
1038 | av_log(s->avctx, AV_LOG_ERROR, | |
1039 | "00 motion_type at %d %d\n", s->mb_x, s->mb_y); | |
f6fa7814 | 1040 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1041 | } |
1042 | } | |
1043 | ||
1044 | s->mb_intra = 0; | |
1045 | if (HAS_CBP(mb_type)) { | |
1046 | s->bdsp.clear_blocks(s->block[0]); | |
1047 | ||
1048 | cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); | |
1049 | if (mb_block_count > 6) { | |
1050 | cbp <<= mb_block_count - 6; | |
1051 | cbp |= get_bits(&s->gb, mb_block_count - 6); | |
1052 | s->bdsp.clear_blocks(s->block[6]); | |
1053 | } | |
1054 | if (cbp <= 0) { | |
1055 | av_log(s->avctx, AV_LOG_ERROR, | |
1056 | "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y); | |
f6fa7814 | 1057 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1058 | } |
1059 | ||
1060 | // if 1, we memcpy blocks in xvmcvideo | |
1061 | if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) | |
1062 | ff_xvmc_pack_pblocks(s, cbp); | |
1063 | ||
1064 | if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { | |
1065 | if (s->flags2 & CODEC_FLAG2_FAST) { | |
1066 | for (i = 0; i < 6; i++) { | |
1067 | if (cbp & 32) | |
1068 | mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); | |
1069 | else | |
1070 | s->block_last_index[i] = -1; | |
1071 | cbp += cbp; | |
1072 | } | |
1073 | } else { | |
1074 | cbp <<= 12 - mb_block_count; | |
1075 | ||
1076 | for (i = 0; i < mb_block_count; i++) { | |
1077 | if (cbp & (1 << 11)) { | |
f6fa7814 DM |
1078 | if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0) |
1079 | return ret; | |
2ba45a60 DM |
1080 | } else { |
1081 | s->block_last_index[i] = -1; | |
1082 | } | |
1083 | cbp += cbp; | |
1084 | } | |
1085 | } | |
1086 | } else { | |
1087 | if (s->flags2 & CODEC_FLAG2_FAST) { | |
1088 | for (i = 0; i < 6; i++) { | |
1089 | if (cbp & 32) | |
1090 | mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i); | |
1091 | else | |
1092 | s->block_last_index[i] = -1; | |
1093 | cbp += cbp; | |
1094 | } | |
1095 | } else { | |
1096 | for (i = 0; i < 6; i++) { | |
1097 | if (cbp & 32) { | |
f6fa7814 DM |
1098 | if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0) |
1099 | return ret; | |
2ba45a60 DM |
1100 | } else { |
1101 | s->block_last_index[i] = -1; | |
1102 | } | |
1103 | cbp += cbp; | |
1104 | } | |
1105 | } | |
1106 | } | |
1107 | } else { | |
1108 | for (i = 0; i < 12; i++) | |
1109 | s->block_last_index[i] = -1; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type; | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static av_cold int mpeg_decode_init(AVCodecContext *avctx) | |
1119 | { | |
1120 | Mpeg1Context *s = avctx->priv_data; | |
1121 | MpegEncContext *s2 = &s->mpeg_enc_ctx; | |
1122 | ||
1123 | ff_mpv_decode_defaults(s2); | |
f6fa7814 DM |
1124 | |
1125 | if ( avctx->codec_tag != AV_RL32("VCR2") | |
1126 | && avctx->codec_tag != AV_RL32("BW10")) | |
1127 | avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input | |
2ba45a60 DM |
1128 | ff_mpv_decode_init(s2, avctx); |
1129 | ||
1130 | s->mpeg_enc_ctx.avctx = avctx; | |
1131 | ||
1132 | /* we need some permutation to store matrices, | |
1133 | * until the decoder sets the real permutation. */ | |
1134 | ff_mpv_idct_init(s2); | |
1135 | ff_mpeg12_common_init(&s->mpeg_enc_ctx); | |
1136 | ff_mpeg12_init_vlcs(); | |
1137 | ||
1138 | s->mpeg_enc_ctx_allocated = 0; | |
1139 | s->mpeg_enc_ctx.picture_number = 0; | |
1140 | s->repeat_field = 0; | |
1141 | s->mpeg_enc_ctx.codec_id = avctx->codec->id; | |
1142 | avctx->color_range = AVCOL_RANGE_MPEG; | |
1143 | if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO) | |
1144 | avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; | |
1145 | else | |
1146 | avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static int mpeg_decode_update_thread_context(AVCodecContext *avctx, | |
1151 | const AVCodecContext *avctx_from) | |
1152 | { | |
1153 | Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data; | |
1154 | MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx; | |
1155 | int err; | |
1156 | ||
1157 | if (avctx == avctx_from || | |
1158 | !ctx_from->mpeg_enc_ctx_allocated || | |
1159 | !s1->context_initialized) | |
1160 | return 0; | |
1161 | ||
1162 | err = ff_mpeg_update_thread_context(avctx, avctx_from); | |
1163 | if (err) | |
1164 | return err; | |
1165 | ||
1166 | if (!ctx->mpeg_enc_ctx_allocated) | |
1167 | memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext)); | |
1168 | ||
1169 | if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)) | |
1170 | s->picture_number++; | |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, | |
1176 | const uint8_t *new_perm) | |
1177 | { | |
1178 | uint16_t temp_matrix[64]; | |
1179 | int i; | |
1180 | ||
1181 | memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t)); | |
1182 | ||
1183 | for (i = 0; i < 64; i++) | |
1184 | matrix[new_perm[i]] = temp_matrix[old_perm[i]]; | |
1185 | } | |
1186 | ||
1187 | static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = { | |
1188 | #if CONFIG_MPEG1_XVMC_HWACCEL | |
1189 | AV_PIX_FMT_XVMC, | |
1190 | #endif | |
1191 | #if CONFIG_MPEG1_VDPAU_HWACCEL | |
1192 | AV_PIX_FMT_VDPAU_MPEG1, | |
1193 | AV_PIX_FMT_VDPAU, | |
1194 | #endif | |
1195 | AV_PIX_FMT_YUV420P, | |
1196 | AV_PIX_FMT_NONE | |
1197 | }; | |
1198 | ||
1199 | static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = { | |
1200 | #if CONFIG_MPEG2_XVMC_HWACCEL | |
1201 | AV_PIX_FMT_XVMC, | |
1202 | #endif | |
1203 | #if CONFIG_MPEG2_VDPAU_HWACCEL | |
1204 | AV_PIX_FMT_VDPAU_MPEG2, | |
1205 | AV_PIX_FMT_VDPAU, | |
1206 | #endif | |
1207 | #if CONFIG_MPEG2_DXVA2_HWACCEL | |
1208 | AV_PIX_FMT_DXVA2_VLD, | |
1209 | #endif | |
1210 | #if CONFIG_MPEG2_VAAPI_HWACCEL | |
1211 | AV_PIX_FMT_VAAPI_VLD, | |
1212 | #endif | |
1213 | AV_PIX_FMT_YUV420P, | |
1214 | AV_PIX_FMT_NONE | |
1215 | }; | |
1216 | ||
1217 | static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = { | |
1218 | AV_PIX_FMT_YUV422P, | |
1219 | AV_PIX_FMT_NONE | |
1220 | }; | |
1221 | ||
1222 | static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = { | |
1223 | AV_PIX_FMT_YUV444P, | |
1224 | AV_PIX_FMT_NONE | |
1225 | }; | |
1226 | ||
1227 | static inline int uses_vdpau(AVCodecContext *avctx) { | |
1228 | return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2; | |
1229 | } | |
1230 | ||
1231 | static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx) | |
1232 | { | |
1233 | Mpeg1Context *s1 = avctx->priv_data; | |
1234 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1235 | const enum AVPixelFormat *pix_fmts; | |
1236 | ||
1237 | if (s->chroma_format < 2) | |
1238 | pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ? | |
1239 | mpeg1_hwaccel_pixfmt_list_420 : | |
1240 | mpeg2_hwaccel_pixfmt_list_420; | |
1241 | else if (s->chroma_format == 2) | |
1242 | pix_fmts = mpeg12_pixfmt_list_422; | |
1243 | else | |
1244 | pix_fmts = mpeg12_pixfmt_list_444; | |
1245 | ||
1246 | return ff_thread_get_format(avctx, pix_fmts); | |
1247 | } | |
1248 | ||
1249 | static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx) | |
1250 | { | |
1251 | // until then pix_fmt may be changed right after codec init | |
1252 | if (avctx->hwaccel || uses_vdpau(avctx)) | |
1253 | if (avctx->idct_algo == FF_IDCT_AUTO) | |
1254 | avctx->idct_algo = FF_IDCT_SIMPLE; | |
1255 | ||
1256 | if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) { | |
1257 | Mpeg1Context *s1 = avctx->priv_data; | |
1258 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1259 | ||
1260 | s->pack_pblocks = 1; | |
1261 | #if FF_API_XVMC | |
1262 | avctx->xvmc_acceleration = 2; | |
1263 | #endif /* FF_API_XVMC */ | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | /* Call this function when we know all parameters. | |
1268 | * It may be called in different places for MPEG-1 and MPEG-2. */ | |
1269 | static int mpeg_decode_postinit(AVCodecContext *avctx) | |
1270 | { | |
1271 | Mpeg1Context *s1 = avctx->priv_data; | |
1272 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1273 | uint8_t old_permutation[64]; | |
1274 | int ret; | |
1275 | ||
1276 | if ((s1->mpeg_enc_ctx_allocated == 0) || | |
1277 | avctx->coded_width != s->width || | |
1278 | avctx->coded_height != s->height || | |
1279 | s1->save_width != s->width || | |
1280 | s1->save_height != s->height || | |
1281 | s1->save_aspect_info != s->aspect_ratio_info || | |
1282 | (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) || | |
1283 | 0) { | |
1284 | if (s1->mpeg_enc_ctx_allocated) { | |
1285 | ParseContext pc = s->parse_context; | |
1286 | s->parse_context.buffer = 0; | |
1287 | ff_mpv_common_end(s); | |
1288 | s->parse_context = pc; | |
1289 | s1->mpeg_enc_ctx_allocated = 0; | |
1290 | } | |
1291 | ||
1292 | if ((s->width == 0) || (s->height == 0)) | |
1293 | return -2; | |
1294 | ||
1295 | ret = ff_set_dimensions(avctx, s->width, s->height); | |
1296 | if (ret < 0) | |
1297 | return ret; | |
1298 | ||
1299 | if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) { | |
1300 | avctx->rc_max_rate = s->bit_rate; | |
1301 | } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate && | |
1302 | (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) { | |
1303 | avctx->bit_rate = s->bit_rate; | |
1304 | } | |
1305 | s1->save_aspect_info = s->aspect_ratio_info; | |
1306 | s1->save_width = s->width; | |
1307 | s1->save_height = s->height; | |
1308 | s1->save_progressive_seq = s->progressive_sequence; | |
1309 | ||
1310 | /* low_delay may be forced, in this case we will have B-frames | |
1311 | * that behave like P-frames. */ | |
1312 | avctx->has_b_frames = !s->low_delay; | |
1313 | ||
1314 | if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) { | |
1315 | // MPEG-1 fps | |
f6fa7814 | 1316 | avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index]; |
2ba45a60 DM |
1317 | // MPEG-1 aspect |
1318 | avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255); | |
1319 | avctx->ticks_per_frame = 1; | |
1320 | } else { // MPEG-2 | |
1321 | // MPEG-2 fps | |
f6fa7814 DM |
1322 | av_reduce(&s->avctx->framerate.num, |
1323 | &s->avctx->framerate.den, | |
1324 | ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num, | |
2ba45a60 DM |
1325 | ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, |
1326 | 1 << 30); | |
1327 | avctx->ticks_per_frame = 2; | |
1328 | // MPEG-2 aspect | |
1329 | if (s->aspect_ratio_info > 1) { | |
1330 | AVRational dar = | |
1331 | av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], | |
1332 | (AVRational) { s1->pan_scan.width, | |
1333 | s1->pan_scan.height }), | |
1334 | (AVRational) { s->width, s->height }); | |
1335 | ||
1336 | /* We ignore the spec here and guess a bit as reality does not | |
1337 | * match the spec, see for example res_change_ffmpeg_aspect.ts | |
1338 | * and sequence-display-aspect.mpg. | |
1339 | * issue1613, 621, 562 */ | |
1340 | if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) || | |
1341 | (av_cmp_q(dar, (AVRational) { 4, 3 }) && | |
1342 | av_cmp_q(dar, (AVRational) { 16, 9 }))) { | |
1343 | s->avctx->sample_aspect_ratio = | |
1344 | av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], | |
1345 | (AVRational) { s->width, s->height }); | |
1346 | } else { | |
1347 | s->avctx->sample_aspect_ratio = | |
1348 | av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], | |
1349 | (AVRational) { s1->pan_scan.width, s1->pan_scan.height }); | |
1350 | // issue1613 4/3 16/9 -> 16/9 | |
1351 | // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3 | |
1352 | // widescreen-issue562.mpg 4/3 16/9 -> 16/9 | |
1353 | // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height}); | |
1354 | av_dlog(avctx, "A %d/%d\n", | |
1355 | ff_mpeg2_aspect[s->aspect_ratio_info].num, | |
1356 | ff_mpeg2_aspect[s->aspect_ratio_info].den); | |
1357 | av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, | |
1358 | s->avctx->sample_aspect_ratio.den); | |
1359 | } | |
1360 | } else { | |
1361 | s->avctx->sample_aspect_ratio = | |
1362 | ff_mpeg2_aspect[s->aspect_ratio_info]; | |
1363 | } | |
1364 | } // MPEG-2 | |
1365 | ||
1366 | ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio); | |
1367 | ||
1368 | avctx->pix_fmt = mpeg_get_pixelformat(avctx); | |
1369 | setup_hwaccel_for_pixfmt(avctx); | |
1370 | ||
1371 | /* Quantization matrices may need reordering | |
1372 | * if DCT permutation is changed. */ | |
1373 | memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t)); | |
1374 | ||
1375 | ff_mpv_idct_init(s); | |
1376 | if (ff_mpv_common_init(s) < 0) | |
1377 | return -2; | |
1378 | ||
1379 | quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation); | |
1380 | quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation); | |
1381 | quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation); | |
1382 | quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation); | |
1383 | ||
1384 | s1->mpeg_enc_ctx_allocated = 1; | |
1385 | } | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf, | |
1390 | int buf_size) | |
1391 | { | |
1392 | Mpeg1Context *s1 = avctx->priv_data; | |
1393 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1394 | int ref, f_code, vbv_delay; | |
1395 | ||
1396 | init_get_bits(&s->gb, buf, buf_size * 8); | |
1397 | ||
1398 | ref = get_bits(&s->gb, 10); /* temporal ref */ | |
1399 | s->pict_type = get_bits(&s->gb, 3); | |
1400 | if (s->pict_type == 0 || s->pict_type > 3) | |
f6fa7814 | 1401 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1402 | |
1403 | vbv_delay = get_bits(&s->gb, 16); | |
1404 | s->vbv_delay = vbv_delay; | |
1405 | if (s->pict_type == AV_PICTURE_TYPE_P || | |
1406 | s->pict_type == AV_PICTURE_TYPE_B) { | |
1407 | s->full_pel[0] = get_bits1(&s->gb); | |
1408 | f_code = get_bits(&s->gb, 3); | |
1409 | if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) | |
f6fa7814 | 1410 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1411 | f_code += !f_code; |
1412 | s->mpeg_f_code[0][0] = f_code; | |
1413 | s->mpeg_f_code[0][1] = f_code; | |
1414 | } | |
1415 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
1416 | s->full_pel[1] = get_bits1(&s->gb); | |
1417 | f_code = get_bits(&s->gb, 3); | |
1418 | if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) | |
f6fa7814 | 1419 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1420 | f_code += !f_code; |
1421 | s->mpeg_f_code[1][0] = f_code; | |
1422 | s->mpeg_f_code[1][1] = f_code; | |
1423 | } | |
1424 | s->current_picture.f->pict_type = s->pict_type; | |
1425 | s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I; | |
1426 | ||
1427 | if (avctx->debug & FF_DEBUG_PICT_INFO) | |
1428 | av_log(avctx, AV_LOG_DEBUG, | |
1429 | "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); | |
1430 | ||
1431 | s->y_dc_scale = 8; | |
1432 | s->c_dc_scale = 8; | |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | static void mpeg_decode_sequence_extension(Mpeg1Context *s1) | |
1437 | { | |
1438 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1439 | int horiz_size_ext, vert_size_ext; | |
1440 | int bit_rate_ext; | |
1441 | ||
1442 | skip_bits(&s->gb, 1); /* profile and level esc*/ | |
1443 | s->avctx->profile = get_bits(&s->gb, 3); | |
1444 | s->avctx->level = get_bits(&s->gb, 4); | |
1445 | s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ | |
1446 | s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ | |
1447 | horiz_size_ext = get_bits(&s->gb, 2); | |
1448 | vert_size_ext = get_bits(&s->gb, 2); | |
1449 | s->width |= (horiz_size_ext << 12); | |
1450 | s->height |= (vert_size_ext << 12); | |
1451 | bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ | |
1452 | s->bit_rate += (bit_rate_ext << 18) * 400; | |
1453 | skip_bits1(&s->gb); /* marker */ | |
1454 | s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10; | |
1455 | ||
1456 | s->low_delay = get_bits1(&s->gb); | |
1457 | if (s->flags & CODEC_FLAG_LOW_DELAY) | |
1458 | s->low_delay = 1; | |
1459 | ||
1460 | s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1; | |
1461 | s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1; | |
1462 | ||
1463 | av_dlog(s->avctx, "sequence extension\n"); | |
1464 | s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; | |
1465 | ||
1466 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) | |
1467 | av_log(s->avctx, AV_LOG_DEBUG, | |
1468 | "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n", | |
1469 | s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, | |
1470 | s->avctx->rc_buffer_size, s->bit_rate); | |
1471 | } | |
1472 | ||
1473 | static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) | |
1474 | { | |
1475 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1476 | int color_description, w, h; | |
1477 | ||
1478 | skip_bits(&s->gb, 3); /* video format */ | |
1479 | color_description = get_bits1(&s->gb); | |
1480 | if (color_description) { | |
1481 | s->avctx->color_primaries = get_bits(&s->gb, 8); | |
1482 | s->avctx->color_trc = get_bits(&s->gb, 8); | |
1483 | s->avctx->colorspace = get_bits(&s->gb, 8); | |
1484 | } | |
1485 | w = get_bits(&s->gb, 14); | |
1486 | skip_bits(&s->gb, 1); // marker | |
1487 | h = get_bits(&s->gb, 14); | |
1488 | // remaining 3 bits are zero padding | |
1489 | ||
1490 | s1->pan_scan.width = 16 * w; | |
1491 | s1->pan_scan.height = 16 * h; | |
1492 | ||
1493 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) | |
1494 | av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h); | |
1495 | } | |
1496 | ||
1497 | static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) | |
1498 | { | |
1499 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1500 | int i, nofco; | |
1501 | ||
1502 | nofco = 1; | |
1503 | if (s->progressive_sequence) { | |
1504 | if (s->repeat_first_field) { | |
1505 | nofco++; | |
1506 | if (s->top_field_first) | |
1507 | nofco++; | |
1508 | } | |
1509 | } else { | |
1510 | if (s->picture_structure == PICT_FRAME) { | |
1511 | nofco++; | |
1512 | if (s->repeat_first_field) | |
1513 | nofco++; | |
1514 | } | |
1515 | } | |
1516 | for (i = 0; i < nofco; i++) { | |
1517 | s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16); | |
1518 | skip_bits(&s->gb, 1); // marker | |
1519 | s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16); | |
1520 | skip_bits(&s->gb, 1); // marker | |
1521 | } | |
1522 | ||
1523 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) | |
1524 | av_log(s->avctx, AV_LOG_DEBUG, | |
1525 | "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n", | |
1526 | s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], | |
1527 | s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], | |
1528 | s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]); | |
1529 | } | |
1530 | ||
1531 | static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], | |
1532 | uint16_t matrix1[64], int intra) | |
1533 | { | |
1534 | int i; | |
1535 | ||
1536 | for (i = 0; i < 64; i++) { | |
1537 | int j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
1538 | int v = get_bits(&s->gb, 8); | |
1539 | if (v == 0) { | |
1540 | av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n"); | |
f6fa7814 | 1541 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1542 | } |
1543 | if (intra && i == 0 && v != 8) { | |
1544 | av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v); | |
1545 | v = 8; // needed by pink.mpg / issue1046 | |
1546 | } | |
1547 | matrix0[j] = v; | |
1548 | if (matrix1) | |
1549 | matrix1[j] = v; | |
1550 | } | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) | |
1555 | { | |
1556 | av_dlog(s->avctx, "matrix extension\n"); | |
1557 | ||
1558 | if (get_bits1(&s->gb)) | |
1559 | load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); | |
1560 | if (get_bits1(&s->gb)) | |
1561 | load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); | |
1562 | if (get_bits1(&s->gb)) | |
1563 | load_matrix(s, s->chroma_intra_matrix, NULL, 1); | |
1564 | if (get_bits1(&s->gb)) | |
1565 | load_matrix(s, s->chroma_inter_matrix, NULL, 0); | |
1566 | } | |
1567 | ||
1568 | static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) | |
1569 | { | |
1570 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
1571 | ||
1572 | s->full_pel[0] = s->full_pel[1] = 0; | |
1573 | s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); | |
1574 | s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); | |
1575 | s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); | |
1576 | s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); | |
1577 | if (!s->pict_type && s1->mpeg_enc_ctx_allocated) { | |
1578 | av_log(s->avctx, AV_LOG_ERROR, | |
1579 | "Missing picture start code, guessing missing values\n"); | |
1580 | if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) { | |
1581 | if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15) | |
1582 | s->pict_type = AV_PICTURE_TYPE_I; | |
1583 | else | |
1584 | s->pict_type = AV_PICTURE_TYPE_P; | |
1585 | } else | |
1586 | s->pict_type = AV_PICTURE_TYPE_B; | |
1587 | s->current_picture.f->pict_type = s->pict_type; | |
1588 | s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I; | |
1589 | } | |
1590 | s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0]; | |
1591 | s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1]; | |
1592 | s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0]; | |
1593 | s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1]; | |
1594 | ||
1595 | s->intra_dc_precision = get_bits(&s->gb, 2); | |
1596 | s->picture_structure = get_bits(&s->gb, 2); | |
1597 | s->top_field_first = get_bits1(&s->gb); | |
1598 | s->frame_pred_frame_dct = get_bits1(&s->gb); | |
1599 | s->concealment_motion_vectors = get_bits1(&s->gb); | |
1600 | s->q_scale_type = get_bits1(&s->gb); | |
1601 | s->intra_vlc_format = get_bits1(&s->gb); | |
1602 | s->alternate_scan = get_bits1(&s->gb); | |
1603 | s->repeat_first_field = get_bits1(&s->gb); | |
1604 | s->chroma_420_type = get_bits1(&s->gb); | |
1605 | s->progressive_frame = get_bits1(&s->gb); | |
1606 | ||
1607 | if (s->alternate_scan) { | |
1608 | ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan); | |
1609 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan); | |
1610 | } else { | |
1611 | ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct); | |
1612 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); | |
1613 | } | |
1614 | ||
1615 | /* composite display not parsed */ | |
1616 | av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); | |
1617 | av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure); | |
1618 | av_dlog(s->avctx, "top field first=%d\n", s->top_field_first); | |
1619 | av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field); | |
1620 | av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); | |
1621 | av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); | |
1622 | av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan); | |
1623 | av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); | |
1624 | av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame); | |
1625 | } | |
1626 | ||
1627 | static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size) | |
1628 | { | |
1629 | AVCodecContext *avctx = s->avctx; | |
1630 | Mpeg1Context *s1 = (Mpeg1Context *) s; | |
f6fa7814 | 1631 | int ret; |
2ba45a60 DM |
1632 | |
1633 | /* start frame decoding */ | |
1634 | if (s->first_field || s->picture_structure == PICT_FRAME) { | |
1635 | AVFrameSideData *pan_scan; | |
1636 | ||
f6fa7814 DM |
1637 | if ((ret = ff_mpv_frame_start(s, avctx)) < 0) |
1638 | return ret; | |
2ba45a60 DM |
1639 | |
1640 | ff_mpeg_er_frame_start(s); | |
1641 | ||
1642 | /* first check if we must repeat the frame */ | |
1643 | s->current_picture_ptr->f->repeat_pict = 0; | |
1644 | if (s->repeat_first_field) { | |
1645 | if (s->progressive_sequence) { | |
1646 | if (s->top_field_first) | |
1647 | s->current_picture_ptr->f->repeat_pict = 4; | |
1648 | else | |
1649 | s->current_picture_ptr->f->repeat_pict = 2; | |
1650 | } else if (s->progressive_frame) { | |
1651 | s->current_picture_ptr->f->repeat_pict = 1; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | pan_scan = av_frame_new_side_data(s->current_picture_ptr->f, | |
1656 | AV_FRAME_DATA_PANSCAN, | |
1657 | sizeof(s1->pan_scan)); | |
1658 | if (!pan_scan) | |
1659 | return AVERROR(ENOMEM); | |
1660 | memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan)); | |
1661 | ||
1662 | if (s1->a53_caption) { | |
1663 | AVFrameSideData *sd = av_frame_new_side_data( | |
1664 | s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC, | |
1665 | s1->a53_caption_size); | |
1666 | if (sd) | |
1667 | memcpy(sd->data, s1->a53_caption, s1->a53_caption_size); | |
1668 | av_freep(&s1->a53_caption); | |
1669 | } | |
1670 | ||
1671 | if (s1->has_stereo3d) { | |
1672 | AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f); | |
1673 | if (!stereo) | |
1674 | return AVERROR(ENOMEM); | |
1675 | ||
1676 | *stereo = s1->stereo3d; | |
1677 | s1->has_stereo3d = 0; | |
1678 | } | |
1679 | ||
1680 | if (s1->has_afd) { | |
1681 | AVFrameSideData *sd = | |
1682 | av_frame_new_side_data(s->current_picture_ptr->f, | |
1683 | AV_FRAME_DATA_AFD, 1); | |
1684 | if (!sd) | |
1685 | return AVERROR(ENOMEM); | |
1686 | ||
1687 | *sd->data = s1->afd; | |
1688 | s1->has_afd = 0; | |
1689 | } | |
1690 | ||
1691 | if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME)) | |
1692 | ff_thread_finish_setup(avctx); | |
1693 | } else { // second field | |
1694 | int i; | |
1695 | ||
1696 | if (!s->current_picture_ptr) { | |
1697 | av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); | |
1698 | return -1; | |
1699 | } | |
1700 | ||
1701 | if (s->avctx->hwaccel && | |
1702 | (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { | |
1703 | if (s->avctx->hwaccel->end_frame(s->avctx) < 0) | |
1704 | av_log(avctx, AV_LOG_ERROR, | |
1705 | "hardware accelerator failed to decode first field\n"); | |
1706 | } | |
1707 | ||
1708 | for (i = 0; i < 4; i++) { | |
1709 | s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i]; | |
1710 | if (s->picture_structure == PICT_BOTTOM_FIELD) | |
1711 | s->current_picture.f->data[i] += | |
1712 | s->current_picture_ptr->f->linesize[i]; | |
1713 | } | |
1714 | } | |
1715 | ||
1716 | if (avctx->hwaccel) { | |
f6fa7814 DM |
1717 | if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0) |
1718 | return ret; | |
2ba45a60 DM |
1719 | } |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | #define DECODE_SLICE_ERROR -1 | |
1725 | #define DECODE_SLICE_OK 0 | |
1726 | ||
1727 | /** | |
1728 | * Decode a slice. | |
1729 | * MpegEncContext.mb_y must be set to the MB row from the startcode. | |
1730 | * @return DECODE_SLICE_ERROR if the slice is damaged, | |
1731 | * DECODE_SLICE_OK if this slice is OK | |
1732 | */ | |
1733 | static int mpeg_decode_slice(MpegEncContext *s, int mb_y, | |
1734 | const uint8_t **buf, int buf_size) | |
1735 | { | |
1736 | AVCodecContext *avctx = s->avctx; | |
1737 | const int lowres = s->avctx->lowres; | |
1738 | const int field_pic = s->picture_structure != PICT_FRAME; | |
f6fa7814 | 1739 | int ret; |
2ba45a60 DM |
1740 | |
1741 | s->resync_mb_x = | |
1742 | s->resync_mb_y = -1; | |
1743 | ||
1744 | av_assert0(mb_y < s->mb_height); | |
1745 | ||
1746 | init_get_bits(&s->gb, *buf, buf_size * 8); | |
1747 | if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16) | |
1748 | skip_bits(&s->gb, 3); | |
1749 | ||
1750 | ff_mpeg1_clean_buffers(s); | |
1751 | s->interlaced_dct = 0; | |
1752 | ||
1753 | s->qscale = get_qscale(s); | |
1754 | ||
1755 | if (s->qscale == 0) { | |
1756 | av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n"); | |
f6fa7814 | 1757 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1758 | } |
1759 | ||
1760 | /* extra slice info */ | |
1761 | if (skip_1stop_8data_bits(&s->gb) < 0) | |
1762 | return AVERROR_INVALIDDATA; | |
1763 | ||
1764 | s->mb_x = 0; | |
1765 | ||
1766 | if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) { | |
1767 | skip_bits1(&s->gb); | |
1768 | } else { | |
1769 | while (get_bits_left(&s->gb) > 0) { | |
1770 | int code = get_vlc2(&s->gb, ff_mbincr_vlc.table, | |
1771 | MBINCR_VLC_BITS, 2); | |
1772 | if (code < 0) { | |
1773 | av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); | |
f6fa7814 | 1774 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1775 | } |
1776 | if (code >= 33) { | |
1777 | if (code == 33) | |
1778 | s->mb_x += 33; | |
1779 | /* otherwise, stuffing, nothing to do */ | |
1780 | } else { | |
1781 | s->mb_x += code; | |
1782 | break; | |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | if (s->mb_x >= (unsigned) s->mb_width) { | |
1788 | av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n"); | |
f6fa7814 | 1789 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1790 | } |
1791 | ||
1792 | if (avctx->hwaccel && avctx->hwaccel->decode_slice) { | |
1793 | const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */ | |
1794 | int start_code = -1; | |
1795 | buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code); | |
1796 | if (buf_end < *buf + buf_size) | |
1797 | buf_end -= 4; | |
1798 | s->mb_y = mb_y; | |
1799 | if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0) | |
1800 | return DECODE_SLICE_ERROR; | |
1801 | *buf = buf_end; | |
1802 | return DECODE_SLICE_OK; | |
1803 | } | |
1804 | ||
1805 | s->resync_mb_x = s->mb_x; | |
1806 | s->resync_mb_y = s->mb_y = mb_y; | |
1807 | s->mb_skip_run = 0; | |
1808 | ff_init_block_index(s); | |
1809 | ||
1810 | if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) { | |
1811 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { | |
1812 | av_log(s->avctx, AV_LOG_DEBUG, | |
1813 | "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", | |
1814 | s->qscale, | |
1815 | s->mpeg_f_code[0][0], s->mpeg_f_code[0][1], | |
1816 | s->mpeg_f_code[1][0], s->mpeg_f_code[1][1], | |
1817 | s->pict_type == AV_PICTURE_TYPE_I ? "I" : | |
1818 | (s->pict_type == AV_PICTURE_TYPE_P ? "P" : | |
1819 | (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), | |
1820 | s->progressive_sequence ? "ps" : "", | |
1821 | s->progressive_frame ? "pf" : "", | |
1822 | s->alternate_scan ? "alt" : "", | |
1823 | s->top_field_first ? "top" : "", | |
1824 | s->intra_dc_precision, s->picture_structure, | |
1825 | s->frame_pred_frame_dct, s->concealment_motion_vectors, | |
1826 | s->q_scale_type, s->intra_vlc_format, | |
1827 | s->repeat_first_field, s->chroma_420_type ? "420" : ""); | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | for (;;) { | |
1832 | // If 1, we memcpy blocks in xvmcvideo. | |
1833 | if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) | |
1834 | ff_xvmc_init_block(s); // set s->block | |
1835 | ||
f6fa7814 DM |
1836 | if ((ret = mpeg_decode_mb(s, s->block)) < 0) |
1837 | return ret; | |
2ba45a60 DM |
1838 | |
1839 | // Note motion_val is normally NULL unless we want to extract the MVs. | |
1840 | if (s->current_picture.motion_val[0] && !s->encoding) { | |
1841 | const int wrap = s->b8_stride; | |
1842 | int xy = s->mb_x * 2 + s->mb_y * 2 * wrap; | |
1843 | int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride); | |
1844 | int motion_x, motion_y, dir, i; | |
1845 | ||
1846 | for (i = 0; i < 2; i++) { | |
1847 | for (dir = 0; dir < 2; dir++) { | |
1848 | if (s->mb_intra || | |
1849 | (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) { | |
1850 | motion_x = motion_y = 0; | |
1851 | } else if (s->mv_type == MV_TYPE_16X16 || | |
1852 | (s->mv_type == MV_TYPE_FIELD && field_pic)) { | |
1853 | motion_x = s->mv[dir][0][0]; | |
1854 | motion_y = s->mv[dir][0][1]; | |
1855 | } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */ | |
1856 | motion_x = s->mv[dir][i][0]; | |
1857 | motion_y = s->mv[dir][i][1]; | |
1858 | } | |
1859 | ||
1860 | s->current_picture.motion_val[dir][xy][0] = motion_x; | |
1861 | s->current_picture.motion_val[dir][xy][1] = motion_y; | |
1862 | s->current_picture.motion_val[dir][xy + 1][0] = motion_x; | |
1863 | s->current_picture.motion_val[dir][xy + 1][1] = motion_y; | |
1864 | s->current_picture.ref_index [dir][b8_xy] = | |
1865 | s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i]; | |
1866 | av_assert2(s->field_select[dir][i] == 0 || | |
1867 | s->field_select[dir][i] == 1); | |
1868 | } | |
1869 | xy += wrap; | |
1870 | b8_xy += 2; | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | s->dest[0] += 16 >> lowres; | |
1875 | s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift; | |
1876 | s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift; | |
1877 | ||
1878 | ff_mpv_decode_mb(s, s->block); | |
1879 | ||
1880 | if (++s->mb_x >= s->mb_width) { | |
1881 | const int mb_size = 16 >> s->avctx->lowres; | |
1882 | ||
1883 | ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size); | |
1884 | ff_mpv_report_decode_progress(s); | |
1885 | ||
1886 | s->mb_x = 0; | |
1887 | s->mb_y += 1 << field_pic; | |
1888 | ||
1889 | if (s->mb_y >= s->mb_height) { | |
1890 | int left = get_bits_left(&s->gb); | |
1891 | int is_d10 = s->chroma_format == 2 && | |
1892 | s->pict_type == AV_PICTURE_TYPE_I && | |
1893 | avctx->profile == 0 && avctx->level == 5 && | |
1894 | s->intra_dc_precision == 2 && | |
1895 | s->q_scale_type == 1 && s->alternate_scan == 0 && | |
1896 | s->progressive_frame == 0 | |
1897 | /* vbv_delay == 0xBBB || 0xE10 */; | |
1898 | ||
1899 | if (left >= 32 && !is_d10) { | |
1900 | GetBitContext gb = s->gb; | |
1901 | align_get_bits(&gb); | |
1902 | if (show_bits(&gb, 24) == 0x060E2B) { | |
1903 | av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n"); | |
1904 | is_d10 = 1; | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | if (left < 0 || | |
1909 | (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) || | |
1910 | ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) { | |
1911 | av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", | |
1912 | left, show_bits(&s->gb, FFMIN(left, 23))); | |
1913 | return -1; | |
1914 | } else | |
1915 | goto eos; | |
1916 | } | |
1917 | // There are some files out there which are missing the last slice | |
1918 | // in cases where the slice is completely outside the visible | |
1919 | // area, we detect this here instead of running into the end expecting | |
1920 | // more data | |
1921 | if (s->mb_y >= ((s->height + 15) >> 4) && | |
1922 | s->progressive_frame && | |
1923 | !s->progressive_sequence && | |
1924 | get_bits_left(&s->gb) <= 8 && | |
1925 | get_bits_left(&s->gb) >= 0 && | |
1926 | s->mb_skip_run == -1 && | |
1927 | show_bits(&s->gb, 8) == 0) | |
1928 | goto eos; | |
1929 | ||
1930 | ff_init_block_index(s); | |
1931 | } | |
1932 | ||
1933 | /* skip mb handling */ | |
1934 | if (s->mb_skip_run == -1) { | |
1935 | /* read increment again */ | |
1936 | s->mb_skip_run = 0; | |
1937 | for (;;) { | |
1938 | int code = get_vlc2(&s->gb, ff_mbincr_vlc.table, | |
1939 | MBINCR_VLC_BITS, 2); | |
1940 | if (code < 0) { | |
1941 | av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n"); | |
f6fa7814 | 1942 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1943 | } |
1944 | if (code >= 33) { | |
1945 | if (code == 33) { | |
1946 | s->mb_skip_run += 33; | |
1947 | } else if (code == 35) { | |
1948 | if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) { | |
1949 | av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n"); | |
1950 | return -1; | |
1951 | } | |
1952 | goto eos; /* end of slice */ | |
1953 | } | |
1954 | /* otherwise, stuffing, nothing to do */ | |
1955 | } else { | |
1956 | s->mb_skip_run += code; | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | if (s->mb_skip_run) { | |
1961 | int i; | |
1962 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
1963 | av_log(s->avctx, AV_LOG_ERROR, | |
1964 | "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y); | |
f6fa7814 | 1965 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1966 | } |
1967 | ||
1968 | /* skip mb */ | |
1969 | s->mb_intra = 0; | |
1970 | for (i = 0; i < 12; i++) | |
1971 | s->block_last_index[i] = -1; | |
1972 | if (s->picture_structure == PICT_FRAME) | |
1973 | s->mv_type = MV_TYPE_16X16; | |
1974 | else | |
1975 | s->mv_type = MV_TYPE_FIELD; | |
1976 | if (s->pict_type == AV_PICTURE_TYPE_P) { | |
1977 | /* if P type, zero motion vector is implied */ | |
1978 | s->mv_dir = MV_DIR_FORWARD; | |
1979 | s->mv[0][0][0] = s->mv[0][0][1] = 0; | |
1980 | s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; | |
1981 | s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; | |
1982 | s->field_select[0][0] = (s->picture_structure - 1) & 1; | |
1983 | } else { | |
1984 | /* if B type, reuse previous vectors and directions */ | |
1985 | s->mv[0][0][0] = s->last_mv[0][0][0]; | |
1986 | s->mv[0][0][1] = s->last_mv[0][0][1]; | |
1987 | s->mv[1][0][0] = s->last_mv[1][0][0]; | |
1988 | s->mv[1][0][1] = s->last_mv[1][0][1]; | |
1989 | } | |
1990 | } | |
1991 | } | |
1992 | } | |
1993 | eos: // end of slice | |
1994 | if (get_bits_left(&s->gb) < 0) { | |
1995 | av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb)); | |
1996 | return AVERROR_INVALIDDATA; | |
1997 | } | |
1998 | *buf += (get_bits_count(&s->gb) - 1) / 8; | |
1999 | av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); | |
2000 | return 0; | |
2001 | } | |
2002 | ||
2003 | static int slice_decode_thread(AVCodecContext *c, void *arg) | |
2004 | { | |
2005 | MpegEncContext *s = *(void **) arg; | |
2006 | const uint8_t *buf = s->gb.buffer; | |
2007 | int mb_y = s->start_mb_y; | |
2008 | const int field_pic = s->picture_structure != PICT_FRAME; | |
2009 | ||
2010 | s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic; | |
2011 | ||
2012 | for (;;) { | |
2013 | uint32_t start_code; | |
2014 | int ret; | |
2015 | ||
2016 | ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf); | |
2017 | emms_c(); | |
2018 | av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n", | |
2019 | ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, | |
2020 | s->start_mb_y, s->end_mb_y, s->er.error_count); | |
2021 | if (ret < 0) { | |
2022 | if (c->err_recognition & AV_EF_EXPLODE) | |
2023 | return ret; | |
2024 | if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0) | |
2025 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
2026 | s->mb_x, s->mb_y, | |
2027 | ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); | |
2028 | } else { | |
2029 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
2030 | s->mb_x - 1, s->mb_y, | |
2031 | ER_AC_END | ER_DC_END | ER_MV_END); | |
2032 | } | |
2033 | ||
2034 | if (s->mb_y == s->end_mb_y) | |
2035 | return 0; | |
2036 | ||
2037 | start_code = -1; | |
2038 | buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code); | |
2039 | mb_y = start_code - SLICE_MIN_START_CODE; | |
2040 | if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16) | |
2041 | mb_y += (*buf&0xE0)<<2; | |
2042 | mb_y <<= field_pic; | |
2043 | if (s->picture_structure == PICT_BOTTOM_FIELD) | |
2044 | mb_y++; | |
2045 | if (mb_y < 0 || mb_y >= s->end_mb_y) | |
2046 | return -1; | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | /** | |
2051 | * Handle slice ends. | |
2052 | * @return 1 if it seems to be the last slice | |
2053 | */ | |
2054 | static int slice_end(AVCodecContext *avctx, AVFrame *pict) | |
2055 | { | |
2056 | Mpeg1Context *s1 = avctx->priv_data; | |
2057 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
2058 | ||
2059 | if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) | |
2060 | return 0; | |
2061 | ||
2062 | if (s->avctx->hwaccel) { | |
2063 | if (s->avctx->hwaccel->end_frame(s->avctx) < 0) | |
2064 | av_log(avctx, AV_LOG_ERROR, | |
2065 | "hardware accelerator failed to decode picture\n"); | |
2066 | } | |
2067 | ||
2068 | /* end of slice reached */ | |
2069 | if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) { | |
2070 | /* end of image */ | |
2071 | ||
2072 | ff_er_frame_end(&s->er); | |
2073 | ||
2074 | ff_mpv_frame_end(s); | |
2075 | ||
2076 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { | |
2077 | int ret = av_frame_ref(pict, s->current_picture_ptr->f); | |
2078 | if (ret < 0) | |
2079 | return ret; | |
2080 | ff_print_debug_info(s, s->current_picture_ptr, pict); | |
2081 | ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2); | |
2082 | } else { | |
2083 | if (avctx->active_thread_type & FF_THREAD_FRAME) | |
2084 | s->picture_number++; | |
2085 | /* latency of 1 frame for I- and P-frames */ | |
2086 | /* XXX: use another variable than picture_number */ | |
2087 | if (s->last_picture_ptr) { | |
2088 | int ret = av_frame_ref(pict, s->last_picture_ptr->f); | |
2089 | if (ret < 0) | |
2090 | return ret; | |
2091 | ff_print_debug_info(s, s->last_picture_ptr, pict); | |
2092 | ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2); | |
2093 | } | |
2094 | } | |
2095 | ||
2096 | return 1; | |
2097 | } else { | |
2098 | return 0; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | static int mpeg1_decode_sequence(AVCodecContext *avctx, | |
2103 | const uint8_t *buf, int buf_size) | |
2104 | { | |
2105 | Mpeg1Context *s1 = avctx->priv_data; | |
2106 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
2107 | int width, height; | |
2108 | int i, v, j; | |
2109 | ||
2110 | init_get_bits(&s->gb, buf, buf_size * 8); | |
2111 | ||
2112 | width = get_bits(&s->gb, 12); | |
2113 | height = get_bits(&s->gb, 12); | |
2114 | if (width == 0 || height == 0) { | |
2115 | av_log(avctx, AV_LOG_WARNING, | |
2116 | "Invalid horizontal or vertical size value.\n"); | |
2117 | if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT)) | |
2118 | return AVERROR_INVALIDDATA; | |
2119 | } | |
2120 | s->aspect_ratio_info = get_bits(&s->gb, 4); | |
2121 | if (s->aspect_ratio_info == 0) { | |
2122 | av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n"); | |
2123 | if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT)) | |
f6fa7814 | 2124 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
2125 | } |
2126 | s->frame_rate_index = get_bits(&s->gb, 4); | |
f6fa7814 DM |
2127 | if (s->frame_rate_index == 0 || s->frame_rate_index > 13) { |
2128 | av_log(avctx, AV_LOG_WARNING, "frame_rate_index %d is invalid\n", s->frame_rate_index); | |
2129 | s->frame_rate_index = 1; | |
2130 | } | |
2ba45a60 | 2131 | s->bit_rate = get_bits(&s->gb, 18) * 400; |
f6fa7814 DM |
2132 | if (get_bits1(&s->gb) == 0) { /* marker */ |
2133 | av_log(avctx, AV_LOG_ERROR, "Marker in sequence header missing\n"); | |
2134 | return AVERROR_INVALIDDATA; | |
2135 | } | |
2ba45a60 DM |
2136 | s->width = width; |
2137 | s->height = height; | |
2138 | ||
2139 | s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16; | |
2140 | skip_bits(&s->gb, 1); | |
2141 | ||
2142 | /* get matrix */ | |
2143 | if (get_bits1(&s->gb)) { | |
2144 | load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); | |
2145 | } else { | |
2146 | for (i = 0; i < 64; i++) { | |
2147 | j = s->idsp.idct_permutation[i]; | |
2148 | v = ff_mpeg1_default_intra_matrix[i]; | |
2149 | s->intra_matrix[j] = v; | |
2150 | s->chroma_intra_matrix[j] = v; | |
2151 | } | |
2152 | } | |
2153 | if (get_bits1(&s->gb)) { | |
2154 | load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); | |
2155 | } else { | |
2156 | for (i = 0; i < 64; i++) { | |
2157 | int j = s->idsp.idct_permutation[i]; | |
2158 | v = ff_mpeg1_default_non_intra_matrix[i]; | |
2159 | s->inter_matrix[j] = v; | |
2160 | s->chroma_inter_matrix[j] = v; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | if (show_bits(&s->gb, 23) != 0) { | |
2165 | av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n"); | |
f6fa7814 | 2166 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
2167 | } |
2168 | ||
2169 | /* We set MPEG-2 parameters so that it emulates MPEG-1. */ | |
2170 | s->progressive_sequence = 1; | |
2171 | s->progressive_frame = 1; | |
2172 | s->picture_structure = PICT_FRAME; | |
2173 | s->first_field = 0; | |
2174 | s->frame_pred_frame_dct = 1; | |
2175 | s->chroma_format = 1; | |
2176 | s->codec_id = | |
2177 | s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; | |
2178 | s->out_format = FMT_MPEG1; | |
2179 | s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER | |
2180 | if (s->flags & CODEC_FLAG_LOW_DELAY) | |
2181 | s->low_delay = 1; | |
2182 | ||
2183 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) | |
f6fa7814 DM |
2184 | av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d, aspect_ratio_info: %d \n", |
2185 | s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info); | |
2ba45a60 DM |
2186 | |
2187 | return 0; | |
2188 | } | |
2189 | ||
2190 | static int vcr2_init_sequence(AVCodecContext *avctx) | |
2191 | { | |
2192 | Mpeg1Context *s1 = avctx->priv_data; | |
2193 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
2194 | int i, v; | |
f6fa7814 | 2195 | int ret; |
2ba45a60 DM |
2196 | |
2197 | /* start new MPEG-1 context decoding */ | |
2198 | s->out_format = FMT_MPEG1; | |
2199 | if (s1->mpeg_enc_ctx_allocated) { | |
2200 | ff_mpv_common_end(s); | |
2201 | s1->mpeg_enc_ctx_allocated = 0; | |
2202 | } | |
2203 | s->width = avctx->coded_width; | |
2204 | s->height = avctx->coded_height; | |
2205 | avctx->has_b_frames = 0; // true? | |
2206 | s->low_delay = 1; | |
2207 | ||
2208 | avctx->pix_fmt = mpeg_get_pixelformat(avctx); | |
2209 | setup_hwaccel_for_pixfmt(avctx); | |
2210 | ||
2211 | ff_mpv_idct_init(s); | |
f6fa7814 DM |
2212 | if ((ret = ff_mpv_common_init(s)) < 0) |
2213 | return ret; | |
2ba45a60 DM |
2214 | s1->mpeg_enc_ctx_allocated = 1; |
2215 | ||
2216 | for (i = 0; i < 64; i++) { | |
2217 | int j = s->idsp.idct_permutation[i]; | |
2218 | v = ff_mpeg1_default_intra_matrix[i]; | |
2219 | s->intra_matrix[j] = v; | |
2220 | s->chroma_intra_matrix[j] = v; | |
2221 | ||
2222 | v = ff_mpeg1_default_non_intra_matrix[i]; | |
2223 | s->inter_matrix[j] = v; | |
2224 | s->chroma_inter_matrix[j] = v; | |
2225 | } | |
2226 | ||
2227 | s->progressive_sequence = 1; | |
2228 | s->progressive_frame = 1; | |
2229 | s->picture_structure = PICT_FRAME; | |
2230 | s->first_field = 0; | |
2231 | s->frame_pred_frame_dct = 1; | |
2232 | s->chroma_format = 1; | |
2233 | if (s->codec_tag == AV_RL32("BW10")) { | |
2234 | s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; | |
2235 | } else { | |
2236 | s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB | |
2237 | s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; | |
2238 | } | |
2239 | s1->save_width = s->width; | |
2240 | s1->save_height = s->height; | |
2241 | s1->save_progressive_seq = s->progressive_sequence; | |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | static int mpeg_decode_a53_cc(AVCodecContext *avctx, | |
2246 | const uint8_t *p, int buf_size) | |
2247 | { | |
2248 | Mpeg1Context *s1 = avctx->priv_data; | |
2249 | ||
2250 | if (buf_size >= 6 && | |
2251 | p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' && | |
2252 | p[4] == 3 && (p[5] & 0x40)) { | |
2253 | /* extract A53 Part 4 CC data */ | |
2254 | int cc_count = p[5] & 0x1f; | |
2255 | if (cc_count > 0 && buf_size >= 7 + cc_count * 3) { | |
2256 | av_freep(&s1->a53_caption); | |
2257 | s1->a53_caption_size = cc_count * 3; | |
2258 | s1->a53_caption = av_malloc(s1->a53_caption_size); | |
2259 | if (s1->a53_caption) | |
2260 | memcpy(s1->a53_caption, p + 7, s1->a53_caption_size); | |
2261 | } | |
2262 | return 1; | |
2263 | } else if (buf_size >= 11 && | |
2264 | p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) { | |
2265 | /* extract DVD CC data */ | |
2266 | int cc_count = 0; | |
2267 | int i; | |
2268 | // There is a caption count field in the data, but it is often | |
2269 | // incorect. So count the number of captions present. | |
2270 | for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6) | |
2271 | cc_count++; | |
2272 | // Transform the DVD format into A53 Part 4 format | |
2273 | if (cc_count > 0) { | |
2274 | av_freep(&s1->a53_caption); | |
2275 | s1->a53_caption_size = cc_count * 6; | |
2276 | s1->a53_caption = av_malloc(s1->a53_caption_size); | |
2277 | if (s1->a53_caption) { | |
2278 | uint8_t field1 = !!(p[4] & 0x80); | |
2279 | uint8_t *cap = s1->a53_caption; | |
2280 | p += 5; | |
2281 | for (i = 0; i < cc_count; i++) { | |
2282 | cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd; | |
2283 | cap[1] = p[1]; | |
2284 | cap[2] = p[2]; | |
2285 | cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd; | |
2286 | cap[4] = p[4]; | |
2287 | cap[5] = p[5]; | |
2288 | cap += 6; | |
2289 | p += 6; | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | return 1; | |
2294 | } | |
2295 | return 0; | |
2296 | } | |
2297 | ||
2298 | static void mpeg_decode_user_data(AVCodecContext *avctx, | |
2299 | const uint8_t *p, int buf_size) | |
2300 | { | |
2301 | Mpeg1Context *s = avctx->priv_data; | |
2302 | const uint8_t *buf_end = p + buf_size; | |
2303 | Mpeg1Context *s1 = avctx->priv_data; | |
2304 | ||
2305 | if (buf_size > 29){ | |
2306 | int i; | |
2307 | for(i=0; i<20; i++) | |
2308 | if (!memcmp(p+i, "\0TMPGEXS\0", 9)){ | |
2309 | s->tmpgexs= 1; | |
2310 | } | |
2311 | ||
2312 | /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){ | |
2313 | av_log(avctx, AV_LOG_ERROR, "%c", p[i]); | |
2314 | } | |
2315 | av_log(avctx, AV_LOG_ERROR, "\n");*/ | |
2316 | } | |
2317 | ||
2318 | /* we parse the DTG active format information */ | |
2319 | if (buf_end - p >= 5 && | |
2320 | p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { | |
2321 | int flags = p[4]; | |
2322 | p += 5; | |
2323 | if (flags & 0x80) { | |
2324 | /* skip event id */ | |
2325 | p += 2; | |
2326 | } | |
2327 | if (flags & 0x40) { | |
2328 | if (buf_end - p < 1) | |
2329 | return; | |
2330 | #if FF_API_AFD | |
2331 | FF_DISABLE_DEPRECATION_WARNINGS | |
2332 | avctx->dtg_active_format = p[0] & 0x0f; | |
2333 | FF_ENABLE_DEPRECATION_WARNINGS | |
2334 | #endif /* FF_API_AFD */ | |
2335 | s1->has_afd = 1; | |
2336 | s1->afd = p[0] & 0x0f; | |
2337 | } | |
2338 | } else if (buf_end - p >= 6 && | |
2339 | p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' && | |
2340 | p[4] == 0x03) { // S3D_video_format_length | |
2341 | // the 0x7F mask ignores the reserved_bit value | |
2342 | const uint8_t S3D_video_format_type = p[5] & 0x7F; | |
2343 | ||
2344 | if (S3D_video_format_type == 0x03 || | |
2345 | S3D_video_format_type == 0x04 || | |
2346 | S3D_video_format_type == 0x08 || | |
2347 | S3D_video_format_type == 0x23) { | |
2348 | ||
2349 | s1->has_stereo3d = 1; | |
2350 | ||
2351 | switch (S3D_video_format_type) { | |
2352 | case 0x03: | |
2353 | s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE; | |
2354 | break; | |
2355 | case 0x04: | |
2356 | s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM; | |
2357 | break; | |
2358 | case 0x08: | |
2359 | s1->stereo3d.type = AV_STEREO3D_2D; | |
2360 | break; | |
2361 | case 0x23: | |
2362 | s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX; | |
2363 | break; | |
2364 | } | |
2365 | } | |
2366 | } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) { | |
2367 | return; | |
2368 | } | |
2369 | } | |
2370 | ||
2371 | static void mpeg_decode_gop(AVCodecContext *avctx, | |
2372 | const uint8_t *buf, int buf_size) | |
2373 | { | |
2374 | Mpeg1Context *s1 = avctx->priv_data; | |
2375 | MpegEncContext *s = &s1->mpeg_enc_ctx; | |
2376 | int broken_link; | |
2377 | int64_t tc; | |
2378 | ||
2379 | init_get_bits(&s->gb, buf, buf_size * 8); | |
2380 | ||
2381 | tc = avctx->timecode_frame_start = get_bits(&s->gb, 25); | |
2382 | ||
2383 | s->closed_gop = get_bits1(&s->gb); | |
2384 | /* broken_link indicate that after editing the | |
2385 | * reference frames of the first B-Frames after GOP I-Frame | |
2386 | * are missing (open gop) */ | |
2387 | broken_link = get_bits1(&s->gb); | |
2388 | ||
2389 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { | |
2390 | char tcbuf[AV_TIMECODE_STR_SIZE]; | |
2391 | av_timecode_make_mpeg_tc_string(tcbuf, tc); | |
2392 | av_log(s->avctx, AV_LOG_DEBUG, | |
2393 | "GOP (%s) closed_gop=%d broken_link=%d\n", | |
2394 | tcbuf, s->closed_gop, broken_link); | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | static int decode_chunks(AVCodecContext *avctx, AVFrame *picture, | |
2399 | int *got_output, const uint8_t *buf, int buf_size) | |
2400 | { | |
2401 | Mpeg1Context *s = avctx->priv_data; | |
2402 | MpegEncContext *s2 = &s->mpeg_enc_ctx; | |
2403 | const uint8_t *buf_ptr = buf; | |
2404 | const uint8_t *buf_end = buf + buf_size; | |
2405 | int ret, input_size; | |
2406 | int last_code = 0, skip_frame = 0; | |
2407 | int picture_start_code_seen = 0; | |
2408 | ||
2409 | for (;;) { | |
2410 | /* find next start code */ | |
2411 | uint32_t start_code = -1; | |
2412 | buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code); | |
2413 | if (start_code > 0x1ff) { | |
2414 | if (!skip_frame) { | |
2415 | if (HAVE_THREADS && | |
2416 | (avctx->active_thread_type & FF_THREAD_SLICE) && | |
2417 | !avctx->hwaccel) { | |
2418 | int i; | |
2419 | av_assert0(avctx->thread_count > 1); | |
2420 | ||
2421 | avctx->execute(avctx, slice_decode_thread, | |
2422 | &s2->thread_context[0], NULL, | |
2423 | s->slice_count, sizeof(void *)); | |
2424 | for (i = 0; i < s->slice_count; i++) | |
2425 | s2->er.error_count += s2->thread_context[i]->er.error_count; | |
2426 | } | |
2427 | ||
2428 | if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER) | |
2429 | && uses_vdpau(avctx)) | |
2430 | ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count); | |
2431 | ||
2432 | ret = slice_end(avctx, picture); | |
2433 | if (ret < 0) | |
2434 | return ret; | |
2435 | else if (ret) { | |
2436 | // FIXME: merge with the stuff in mpeg_decode_slice | |
2437 | if (s2->last_picture_ptr || s2->low_delay) | |
2438 | *got_output = 1; | |
2439 | } | |
2440 | } | |
2441 | s2->pict_type = 0; | |
2442 | ||
2443 | if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count) | |
2444 | return AVERROR_INVALIDDATA; | |
2445 | ||
2446 | return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); | |
2447 | } | |
2448 | ||
2449 | input_size = buf_end - buf_ptr; | |
2450 | ||
2451 | if (avctx->debug & FF_DEBUG_STARTCODE) | |
2452 | av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n", | |
2453 | start_code, buf_ptr - buf, input_size); | |
2454 | ||
2455 | /* prepare data for next start code */ | |
2456 | switch (start_code) { | |
2457 | case SEQ_START_CODE: | |
2458 | if (last_code == 0) { | |
2459 | mpeg1_decode_sequence(avctx, buf_ptr, input_size); | |
2460 | if (buf != avctx->extradata) | |
2461 | s->sync = 1; | |
2462 | } else { | |
2463 | av_log(avctx, AV_LOG_ERROR, | |
2464 | "ignoring SEQ_START_CODE after %X\n", last_code); | |
2465 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2466 | return AVERROR_INVALIDDATA; | |
2467 | } | |
2468 | break; | |
2469 | ||
2470 | case PICTURE_START_CODE: | |
2471 | if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) { | |
2472 | /* If it's a frame picture, there can't be more than one picture header. | |
2473 | Yet, it does happen and we need to handle it. */ | |
2474 | av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n"); | |
2475 | break; | |
2476 | } | |
2477 | picture_start_code_seen = 1; | |
2478 | ||
2479 | if (s2->width <= 0 || s2->height <= 0) { | |
2480 | av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n", | |
2481 | s2->width, s2->height); | |
2482 | return AVERROR_INVALIDDATA; | |
2483 | } | |
2484 | ||
2485 | if (s->tmpgexs){ | |
2486 | s2->intra_dc_precision= 3; | |
2487 | s2->intra_matrix[0]= 1; | |
2488 | } | |
2489 | if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && | |
2490 | !avctx->hwaccel && s->slice_count) { | |
2491 | int i; | |
2492 | ||
2493 | avctx->execute(avctx, slice_decode_thread, | |
2494 | s2->thread_context, NULL, | |
2495 | s->slice_count, sizeof(void *)); | |
2496 | for (i = 0; i < s->slice_count; i++) | |
2497 | s2->er.error_count += s2->thread_context[i]->er.error_count; | |
2498 | s->slice_count = 0; | |
2499 | } | |
2500 | if (last_code == 0 || last_code == SLICE_MIN_START_CODE) { | |
2501 | ret = mpeg_decode_postinit(avctx); | |
2502 | if (ret < 0) { | |
2503 | av_log(avctx, AV_LOG_ERROR, | |
2504 | "mpeg_decode_postinit() failure\n"); | |
2505 | return ret; | |
2506 | } | |
2507 | ||
2508 | /* We have a complete image: we try to decompress it. */ | |
2509 | if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0) | |
2510 | s2->pict_type = 0; | |
2511 | s->first_slice = 1; | |
2512 | last_code = PICTURE_START_CODE; | |
2513 | } else { | |
2514 | av_log(avctx, AV_LOG_ERROR, | |
2515 | "ignoring pic after %X\n", last_code); | |
2516 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2517 | return AVERROR_INVALIDDATA; | |
2518 | } | |
2519 | break; | |
2520 | case EXT_START_CODE: | |
2521 | init_get_bits(&s2->gb, buf_ptr, input_size * 8); | |
2522 | ||
2523 | switch (get_bits(&s2->gb, 4)) { | |
2524 | case 0x1: | |
2525 | if (last_code == 0) { | |
2526 | mpeg_decode_sequence_extension(s); | |
2527 | } else { | |
2528 | av_log(avctx, AV_LOG_ERROR, | |
2529 | "ignoring seq ext after %X\n", last_code); | |
2530 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2531 | return AVERROR_INVALIDDATA; | |
2532 | } | |
2533 | break; | |
2534 | case 0x2: | |
2535 | mpeg_decode_sequence_display_extension(s); | |
2536 | break; | |
2537 | case 0x3: | |
2538 | mpeg_decode_quant_matrix_extension(s2); | |
2539 | break; | |
2540 | case 0x7: | |
2541 | mpeg_decode_picture_display_extension(s); | |
2542 | break; | |
2543 | case 0x8: | |
2544 | if (last_code == PICTURE_START_CODE) { | |
2545 | mpeg_decode_picture_coding_extension(s); | |
2546 | } else { | |
2547 | av_log(avctx, AV_LOG_ERROR, | |
2548 | "ignoring pic cod ext after %X\n", last_code); | |
2549 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2550 | return AVERROR_INVALIDDATA; | |
2551 | } | |
2552 | break; | |
2553 | } | |
2554 | break; | |
2555 | case USER_START_CODE: | |
2556 | mpeg_decode_user_data(avctx, buf_ptr, input_size); | |
2557 | break; | |
2558 | case GOP_START_CODE: | |
2559 | if (last_code == 0) { | |
2560 | s2->first_field = 0; | |
2561 | mpeg_decode_gop(avctx, buf_ptr, input_size); | |
2562 | s->sync = 1; | |
2563 | } else { | |
2564 | av_log(avctx, AV_LOG_ERROR, | |
2565 | "ignoring GOP_START_CODE after %X\n", last_code); | |
2566 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2567 | return AVERROR_INVALIDDATA; | |
2568 | } | |
2569 | break; | |
2570 | default: | |
2571 | if (start_code >= SLICE_MIN_START_CODE && | |
2572 | start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) { | |
2573 | if (s2->progressive_sequence && !s2->progressive_frame) { | |
2574 | s2->progressive_frame = 1; | |
2575 | av_log(s2->avctx, AV_LOG_ERROR, | |
2576 | "interlaced frame in progressive sequence, ignoring\n"); | |
2577 | } | |
2578 | ||
2579 | if (s2->picture_structure == 0 || | |
2580 | (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) { | |
2581 | av_log(s2->avctx, AV_LOG_ERROR, | |
2582 | "picture_structure %d invalid, ignoring\n", | |
2583 | s2->picture_structure); | |
2584 | s2->picture_structure = PICT_FRAME; | |
2585 | } | |
2586 | ||
2587 | if (s2->progressive_sequence && !s2->frame_pred_frame_dct) | |
2588 | av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n"); | |
2589 | ||
2590 | if (s2->picture_structure == PICT_FRAME) { | |
2591 | s2->first_field = 0; | |
2592 | s2->v_edge_pos = 16 * s2->mb_height; | |
2593 | } else { | |
2594 | s2->first_field ^= 1; | |
2595 | s2->v_edge_pos = 8 * s2->mb_height; | |
2596 | memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height); | |
2597 | } | |
2598 | } | |
2599 | if (start_code >= SLICE_MIN_START_CODE && | |
2600 | start_code <= SLICE_MAX_START_CODE && last_code != 0) { | |
2601 | const int field_pic = s2->picture_structure != PICT_FRAME; | |
2602 | int mb_y = start_code - SLICE_MIN_START_CODE; | |
2603 | last_code = SLICE_MIN_START_CODE; | |
2604 | if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16) | |
2605 | mb_y += (*buf_ptr&0xE0)<<2; | |
2606 | ||
2607 | mb_y <<= field_pic; | |
2608 | if (s2->picture_structure == PICT_BOTTOM_FIELD) | |
2609 | mb_y++; | |
2610 | ||
2611 | if (buf_end - buf_ptr < 2) { | |
2612 | av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n"); | |
2613 | return AVERROR_INVALIDDATA; | |
2614 | } | |
2615 | ||
2616 | if (mb_y >= s2->mb_height) { | |
2617 | av_log(s2->avctx, AV_LOG_ERROR, | |
2618 | "slice below image (%d >= %d)\n", mb_y, s2->mb_height); | |
f6fa7814 | 2619 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
2620 | } |
2621 | ||
2622 | if (!s2->last_picture_ptr) { | |
2623 | /* Skip B-frames if we do not have reference frames and | |
2624 | * GOP is not closed. */ | |
2625 | if (s2->pict_type == AV_PICTURE_TYPE_B) { | |
2626 | if (!s2->closed_gop) { | |
2627 | skip_frame = 1; | |
2628 | break; | |
2629 | } | |
2630 | } | |
2631 | } | |
2632 | if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL)) | |
2633 | s->sync = 1; | |
2634 | if (!s2->next_picture_ptr) { | |
2635 | /* Skip P-frames if we do not have a reference frame or | |
2636 | * we have an invalid header. */ | |
2637 | if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) { | |
2638 | skip_frame = 1; | |
2639 | break; | |
2640 | } | |
2641 | } | |
2642 | if ((avctx->skip_frame >= AVDISCARD_NONREF && | |
2643 | s2->pict_type == AV_PICTURE_TYPE_B) || | |
2644 | (avctx->skip_frame >= AVDISCARD_NONKEY && | |
2645 | s2->pict_type != AV_PICTURE_TYPE_I) || | |
2646 | avctx->skip_frame >= AVDISCARD_ALL) { | |
2647 | skip_frame = 1; | |
2648 | break; | |
2649 | } | |
2650 | ||
2651 | if (!s->mpeg_enc_ctx_allocated) | |
2652 | break; | |
2653 | ||
2654 | if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) { | |
2655 | if (mb_y < avctx->skip_top || | |
2656 | mb_y >= s2->mb_height - avctx->skip_bottom) | |
2657 | break; | |
2658 | } | |
2659 | ||
2660 | if (!s2->pict_type) { | |
2661 | av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n"); | |
2662 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2663 | return AVERROR_INVALIDDATA; | |
2664 | break; | |
2665 | } | |
2666 | ||
2667 | if (s->first_slice) { | |
2668 | skip_frame = 0; | |
2669 | s->first_slice = 0; | |
f6fa7814 DM |
2670 | if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0) |
2671 | return ret; | |
2ba45a60 DM |
2672 | } |
2673 | if (!s2->current_picture_ptr) { | |
2674 | av_log(avctx, AV_LOG_ERROR, | |
2675 | "current_picture not initialized\n"); | |
2676 | return AVERROR_INVALIDDATA; | |
2677 | } | |
2678 | ||
2679 | if (uses_vdpau(avctx)) { | |
2680 | s->slice_count++; | |
2681 | break; | |
2682 | } | |
2683 | ||
2684 | if (HAVE_THREADS && | |
2685 | (avctx->active_thread_type & FF_THREAD_SLICE) && | |
2686 | !avctx->hwaccel) { | |
2687 | int threshold = (s2->mb_height * s->slice_count + | |
2688 | s2->slice_context_count / 2) / | |
2689 | s2->slice_context_count; | |
2690 | av_assert0(avctx->thread_count > 1); | |
2691 | if (threshold <= mb_y) { | |
2692 | MpegEncContext *thread_context = s2->thread_context[s->slice_count]; | |
2693 | ||
2694 | thread_context->start_mb_y = mb_y; | |
2695 | thread_context->end_mb_y = s2->mb_height; | |
2696 | if (s->slice_count) { | |
2697 | s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y; | |
2698 | ret = ff_update_duplicate_context(thread_context, s2); | |
2699 | if (ret < 0) | |
2700 | return ret; | |
2701 | } | |
2702 | init_get_bits(&thread_context->gb, buf_ptr, input_size * 8); | |
2703 | s->slice_count++; | |
2704 | } | |
2705 | buf_ptr += 2; // FIXME add minimum number of bytes per slice | |
2706 | } else { | |
2707 | ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size); | |
2708 | emms_c(); | |
2709 | ||
2710 | if (ret < 0) { | |
2711 | if (avctx->err_recognition & AV_EF_EXPLODE) | |
2712 | return ret; | |
2713 | if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0) | |
2714 | ff_er_add_slice(&s2->er, s2->resync_mb_x, | |
2715 | s2->resync_mb_y, s2->mb_x, s2->mb_y, | |
2716 | ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); | |
2717 | } else { | |
2718 | ff_er_add_slice(&s2->er, s2->resync_mb_x, | |
2719 | s2->resync_mb_y, s2->mb_x - 1, s2->mb_y, | |
2720 | ER_AC_END | ER_DC_END | ER_MV_END); | |
2721 | } | |
2722 | } | |
2723 | } | |
2724 | break; | |
2725 | } | |
2726 | } | |
2727 | } | |
2728 | ||
2729 | static int mpeg_decode_frame(AVCodecContext *avctx, void *data, | |
2730 | int *got_output, AVPacket *avpkt) | |
2731 | { | |
2732 | const uint8_t *buf = avpkt->data; | |
2733 | int ret; | |
2734 | int buf_size = avpkt->size; | |
2735 | Mpeg1Context *s = avctx->priv_data; | |
2736 | AVFrame *picture = data; | |
2737 | MpegEncContext *s2 = &s->mpeg_enc_ctx; | |
2738 | ||
2739 | if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { | |
2740 | /* special case for last picture */ | |
2741 | if (s2->low_delay == 0 && s2->next_picture_ptr) { | |
2742 | int ret = av_frame_ref(picture, s2->next_picture_ptr->f); | |
2743 | if (ret < 0) | |
2744 | return ret; | |
2745 | ||
2746 | s2->next_picture_ptr = NULL; | |
2747 | ||
2748 | *got_output = 1; | |
2749 | } | |
2750 | return buf_size; | |
2751 | } | |
2752 | ||
2753 | if (s2->flags & CODEC_FLAG_TRUNCATED) { | |
2754 | int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, | |
2755 | buf_size, NULL); | |
2756 | ||
2757 | if (ff_combine_frame(&s2->parse_context, next, | |
2758 | (const uint8_t **) &buf, &buf_size) < 0) | |
2759 | return buf_size; | |
2760 | } | |
2761 | ||
2762 | s2->codec_tag = avpriv_toupper4(avctx->codec_tag); | |
2763 | if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2") | |
2764 | || s2->codec_tag == AV_RL32("BW10") | |
2765 | )) | |
2766 | vcr2_init_sequence(avctx); | |
2767 | ||
2768 | s->slice_count = 0; | |
2769 | ||
2770 | if (avctx->extradata && !s->extradata_decoded) { | |
2771 | ret = decode_chunks(avctx, picture, got_output, | |
2772 | avctx->extradata, avctx->extradata_size); | |
2773 | if (*got_output) { | |
2774 | av_log(avctx, AV_LOG_ERROR, "picture in extradata\n"); | |
2775 | *got_output = 0; | |
2776 | } | |
2777 | s->extradata_decoded = 1; | |
2778 | if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) { | |
2779 | s2->current_picture_ptr = NULL; | |
2780 | return ret; | |
2781 | } | |
2782 | } | |
2783 | ||
2784 | ret = decode_chunks(avctx, picture, got_output, buf, buf_size); | |
2785 | if (ret<0 || *got_output) | |
2786 | s2->current_picture_ptr = NULL; | |
2787 | ||
2788 | return ret; | |
2789 | } | |
2790 | ||
2791 | static void flush(AVCodecContext *avctx) | |
2792 | { | |
2793 | Mpeg1Context *s = avctx->priv_data; | |
2794 | ||
2795 | s->sync = 0; | |
2796 | ||
2797 | ff_mpeg_flush(avctx); | |
2798 | } | |
2799 | ||
2800 | static av_cold int mpeg_decode_end(AVCodecContext *avctx) | |
2801 | { | |
2802 | Mpeg1Context *s = avctx->priv_data; | |
2803 | ||
2804 | if (s->mpeg_enc_ctx_allocated) | |
2805 | ff_mpv_common_end(&s->mpeg_enc_ctx); | |
2806 | av_freep(&s->a53_caption); | |
2807 | return 0; | |
2808 | } | |
2809 | ||
2810 | static const AVProfile mpeg2_video_profiles[] = { | |
2811 | { FF_PROFILE_MPEG2_422, "4:2:2" }, | |
2812 | { FF_PROFILE_MPEG2_HIGH, "High" }, | |
2813 | { FF_PROFILE_MPEG2_SS, "Spatially Scalable" }, | |
2814 | { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" }, | |
2815 | { FF_PROFILE_MPEG2_MAIN, "Main" }, | |
2816 | { FF_PROFILE_MPEG2_SIMPLE, "Simple" }, | |
2817 | { FF_PROFILE_RESERVED, "Reserved" }, | |
2818 | { FF_PROFILE_RESERVED, "Reserved" }, | |
2819 | { FF_PROFILE_UNKNOWN }, | |
2820 | }; | |
2821 | ||
2822 | AVCodec ff_mpeg1video_decoder = { | |
2823 | .name = "mpeg1video", | |
2824 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"), | |
2825 | .type = AVMEDIA_TYPE_VIDEO, | |
2826 | .id = AV_CODEC_ID_MPEG1VIDEO, | |
2827 | .priv_data_size = sizeof(Mpeg1Context), | |
2828 | .init = mpeg_decode_init, | |
2829 | .close = mpeg_decode_end, | |
2830 | .decode = mpeg_decode_frame, | |
2831 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
2832 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | | |
2833 | CODEC_CAP_SLICE_THREADS, | |
2834 | .flush = flush, | |
2835 | .max_lowres = 3, | |
2836 | .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context) | |
2837 | }; | |
2838 | ||
2839 | AVCodec ff_mpeg2video_decoder = { | |
2840 | .name = "mpeg2video", | |
2841 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"), | |
2842 | .type = AVMEDIA_TYPE_VIDEO, | |
2843 | .id = AV_CODEC_ID_MPEG2VIDEO, | |
2844 | .priv_data_size = sizeof(Mpeg1Context), | |
2845 | .init = mpeg_decode_init, | |
2846 | .close = mpeg_decode_end, | |
2847 | .decode = mpeg_decode_frame, | |
2848 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
2849 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | | |
2850 | CODEC_CAP_SLICE_THREADS, | |
2851 | .flush = flush, | |
2852 | .max_lowres = 3, | |
2853 | .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles), | |
2854 | }; | |
2855 | ||
2856 | //legacy decoder | |
2857 | AVCodec ff_mpegvideo_decoder = { | |
2858 | .name = "mpegvideo", | |
2859 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"), | |
2860 | .type = AVMEDIA_TYPE_VIDEO, | |
2861 | .id = AV_CODEC_ID_MPEG2VIDEO, | |
2862 | .priv_data_size = sizeof(Mpeg1Context), | |
2863 | .init = mpeg_decode_init, | |
2864 | .close = mpeg_decode_end, | |
2865 | .decode = mpeg_decode_frame, | |
2866 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, | |
2867 | .flush = flush, | |
2868 | .max_lowres = 3, | |
2869 | }; | |
2870 | ||
2871 | #if FF_API_XVMC | |
2872 | #if CONFIG_MPEG_XVMC_DECODER | |
2873 | static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx) | |
2874 | { | |
2875 | if (avctx->active_thread_type & FF_THREAD_SLICE) | |
2876 | return -1; | |
2877 | if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER)) | |
2878 | return -1; | |
2879 | if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { | |
2880 | av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); | |
2881 | } | |
2882 | mpeg_decode_init(avctx); | |
2883 | ||
2884 | avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT; | |
2885 | avctx->xvmc_acceleration = 2; // 2 - the blocks are packed! | |
2886 | ||
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | AVCodec ff_mpeg_xvmc_decoder = { | |
2891 | .name = "mpegvideo_xvmc", | |
2892 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"), | |
2893 | .type = AVMEDIA_TYPE_VIDEO, | |
2894 | .id = AV_CODEC_ID_MPEG2VIDEO_XVMC, | |
2895 | .priv_data_size = sizeof(Mpeg1Context), | |
2896 | .init = mpeg_mc_decode_init, | |
2897 | .close = mpeg_decode_end, | |
2898 | .decode = mpeg_decode_frame, | |
2899 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
2900 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, | |
2901 | .flush = flush, | |
2902 | }; | |
2903 | ||
2904 | #endif | |
2905 | #endif /* FF_API_XVMC */ | |
2906 | ||
2907 | #if CONFIG_MPEG_VDPAU_DECODER | |
2908 | AVCodec ff_mpeg_vdpau_decoder = { | |
2909 | .name = "mpegvideo_vdpau", | |
2910 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"), | |
2911 | .type = AVMEDIA_TYPE_VIDEO, | |
2912 | .id = AV_CODEC_ID_MPEG2VIDEO, | |
2913 | .priv_data_size = sizeof(Mpeg1Context), | |
2914 | .init = mpeg_decode_init, | |
2915 | .close = mpeg_decode_end, | |
2916 | .decode = mpeg_decode_frame, | |
2917 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | | |
2918 | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, | |
2919 | .flush = flush, | |
2920 | }; | |
2921 | #endif | |
2922 | ||
2923 | #if CONFIG_MPEG1_VDPAU_DECODER | |
2924 | AVCodec ff_mpeg1_vdpau_decoder = { | |
2925 | .name = "mpeg1video_vdpau", | |
2926 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"), | |
2927 | .type = AVMEDIA_TYPE_VIDEO, | |
2928 | .id = AV_CODEC_ID_MPEG1VIDEO, | |
2929 | .priv_data_size = sizeof(Mpeg1Context), | |
2930 | .init = mpeg_decode_init, | |
2931 | .close = mpeg_decode_end, | |
2932 | .decode = mpeg_decode_frame, | |
2933 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | | |
2934 | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, | |
2935 | .flush = flush, | |
2936 | }; | |
2937 | #endif |