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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mpeg12dec.c
CommitLineData
2ba45a60
DM		 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
50typedef 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
73static 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
83static 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
97static 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 */
105static 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
140static 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 }
215end:
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
223int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
224{
225 return mpeg1_decode_block_intra(s, block, n);
226}
227
228static 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 }
300end:
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 */
313static 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 }
385end:
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
393static 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 }
465end:
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 */
480static 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 }
538end:
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
545static 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 */
631static 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
708static 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
716static 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
732static 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);
736
737 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
738
739 av_assert2(s->mb_skipped == 0);
740
741 if (s->mb_skip_run-- != 0) {
742 if (s->pict_type == AV_PICTURE_TYPE_P) {
743 s->mb_skipped = 1;
744 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
745 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
746 } else {
747 int mb_type;
748
749 if (s->mb_x)
750 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
751 else
752 // FIXME not sure if this is allowed in MPEG at all
753 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
754 if (IS_INTRA(mb_type)) {
755 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
756 return -1;
757 }
758 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
759 mb_type | MB_TYPE_SKIP;
760
761 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
762 s->mb_skipped = 1;
763 }
764
765 return 0;
766 }
767
768 switch (s->pict_type) {
769 default:
770 case AV_PICTURE_TYPE_I:
771 if (get_bits1(&s->gb) == 0) {
772 if (get_bits1(&s->gb) == 0) {
773 av_log(s->avctx, AV_LOG_ERROR,
774 "invalid mb type in I Frame at %d %d\n",
775 s->mb_x, s->mb_y);
776 return -1;
777 }
778 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
779 } else {
780 mb_type = MB_TYPE_INTRA;
781 }
782 break;
783 case AV_PICTURE_TYPE_P:
784 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
785 if (mb_type < 0) {
786 av_log(s->avctx, AV_LOG_ERROR,
787 "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
788 return -1;
789 }
790 mb_type = ptype2mb_type[mb_type];
791 break;
792 case AV_PICTURE_TYPE_B:
793 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
794 if (mb_type < 0) {
795 av_log(s->avctx, AV_LOG_ERROR,
796 "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
797 return -1;
798 }
799 mb_type = btype2mb_type[mb_type];
800 break;
801 }
802 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
803// motion_type = 0; /* avoid warning */
804 if (IS_INTRA(mb_type)) {
805 s->bdsp.clear_blocks(s->block[0]);
806
807 if (!s->chroma_y_shift)
808 s->bdsp.clear_blocks(s->block[6]);
809
810 /* compute DCT type */
811 // FIXME: add an interlaced_dct coded var?
812 if (s->picture_structure == PICT_FRAME &&
813 !s->frame_pred_frame_dct)
814 s->interlaced_dct = get_bits1(&s->gb);
815
816 if (IS_QUANT(mb_type))
817 s->qscale = get_qscale(s);
818
819 if (s->concealment_motion_vectors) {
820 /* just parse them */
821 if (s->picture_structure != PICT_FRAME)
822 skip_bits1(&s->gb); /* field select */
823
824 s->mv[0][0][0] =
825 s->last_mv[0][0][0] =
826 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
827 s->last_mv[0][0][0]);
828 s->mv[0][0][1] =
829 s->last_mv[0][0][1] =
830 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
831 s->last_mv[0][0][1]);
832
833 skip_bits1(&s->gb); /* marker */
834 } else {
835 /* reset mv prediction */
836 memset(s->last_mv, 0, sizeof(s->last_mv));
837 }
838 s->mb_intra = 1;
839 // if 1, we memcpy blocks in xvmcvideo
840 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
841 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
842
843 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
844 if (s->flags2 & CODEC_FLAG2_FAST) {
845 for (i = 0; i < 6; i++)
846 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
847 } else {
848 for (i = 0; i < mb_block_count; i++)
849 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
850 return -1;
851 }
852 } else {
853 for (i = 0; i < 6; i++)
854 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
855 return -1;
856 }
857 } else {
858 if (mb_type & MB_TYPE_ZERO_MV) {
859 av_assert2(mb_type & MB_TYPE_CBP);
860
861 s->mv_dir = MV_DIR_FORWARD;
862 if (s->picture_structure == PICT_FRAME) {
863 if (s->picture_structure == PICT_FRAME
864 && !s->frame_pred_frame_dct)
865 s->interlaced_dct = get_bits1(&s->gb);
866 s->mv_type = MV_TYPE_16X16;
867 } else {
868 s->mv_type = MV_TYPE_FIELD;
869 mb_type |= MB_TYPE_INTERLACED;
870 s->field_select[0][0] = s->picture_structure - 1;
871 }
872
873 if (IS_QUANT(mb_type))
874 s->qscale = get_qscale(s);
875
876 s->last_mv[0][0][0] = 0;
877 s->last_mv[0][0][1] = 0;
878 s->last_mv[0][1][0] = 0;
879 s->last_mv[0][1][1] = 0;
880 s->mv[0][0][0] = 0;
881 s->mv[0][0][1] = 0;
882 } else {
883 av_assert2(mb_type & MB_TYPE_L0L1);
884 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
885 /* get additional motion vector type */
886 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
887 motion_type = MT_FRAME;
888 } else {
889 motion_type = get_bits(&s->gb, 2);
890 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
891 s->interlaced_dct = get_bits1(&s->gb);
892 }
893
894 if (IS_QUANT(mb_type))
895 s->qscale = get_qscale(s);
896
897 /* motion vectors */
898 s->mv_dir = (mb_type >> 13) & 3;
899 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
900 switch (motion_type) {
901 case MT_FRAME: /* or MT_16X8 */
902 if (s->picture_structure == PICT_FRAME) {
903 mb_type |= MB_TYPE_16x16;
904 s->mv_type = MV_TYPE_16X16;
905 for (i = 0; i < 2; i++) {
906 if (USES_LIST(mb_type, i)) {
907 /* MT_FRAME */
908 s->mv[i][0][0] =
909 s->last_mv[i][0][0] =
910 s->last_mv[i][1][0] =
911 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
912 s->last_mv[i][0][0]);
913 s->mv[i][0][1] =
914 s->last_mv[i][0][1] =
915 s->last_mv[i][1][1] =
916 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
917 s->last_mv[i][0][1]);
918 /* full_pel: only for MPEG-1 */
919 if (s->full_pel[i]) {
920 s->mv[i][0][0] <<= 1;
921 s->mv[i][0][1] <<= 1;
922 }
923 }
924 }
925 } else {
926 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
927 s->mv_type = MV_TYPE_16X8;
928 for (i = 0; i < 2; i++) {
929 if (USES_LIST(mb_type, i)) {
930 /* MT_16X8 */
931 for (j = 0; j < 2; j++) {
932 s->field_select[i][j] = get_bits1(&s->gb);
933 for (k = 0; k < 2; k++) {
934 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
935 s->last_mv[i][j][k]);
936 s->last_mv[i][j][k] = val;
937 s->mv[i][j][k] = val;
938 }
939 }
940 }
941 }
942 }
943 break;
944 case MT_FIELD:
945 s->mv_type = MV_TYPE_FIELD;
946 if (s->picture_structure == PICT_FRAME) {
947 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
948 for (i = 0; i < 2; i++) {
949 if (USES_LIST(mb_type, i)) {
950 for (j = 0; j < 2; j++) {
951 s->field_select[i][j] = get_bits1(&s->gb);
952 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
953 s->last_mv[i][j][0]);
954 s->last_mv[i][j][0] = val;
955 s->mv[i][j][0] = val;
956 av_dlog(s->avctx, "fmx=%d\n", val);
957 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
958 s->last_mv[i][j][1] >> 1);
959 s->last_mv[i][j][1] = val << 1;
960 s->mv[i][j][1] = val;
961 av_dlog(s->avctx, "fmy=%d\n", val);
962 }
963 }
964 }
965 } else {
966 av_assert0(!s->progressive_sequence);
967 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
968 for (i = 0; i < 2; i++) {
969 if (USES_LIST(mb_type, i)) {
970 s->field_select[i][0] = get_bits1(&s->gb);
971 for (k = 0; k < 2; k++) {
972 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
973 s->last_mv[i][0][k]);
974 s->last_mv[i][0][k] = val;
975 s->last_mv[i][1][k] = val;
976 s->mv[i][0][k] = val;
977 }
978 }
979 }
980 }
981 break;
982 case MT_DMV:
983 if (s->progressive_sequence){
984 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
985 return -1;
986 }
987 s->mv_type = MV_TYPE_DMV;
988 for (i = 0; i < 2; i++) {
989 if (USES_LIST(mb_type, i)) {
990 int dmx, dmy, mx, my, m;
991 const int my_shift = s->picture_structure == PICT_FRAME;
992
993 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
994 s->last_mv[i][0][0]);
995 s->last_mv[i][0][0] = mx;
996 s->last_mv[i][1][0] = mx;
997 dmx = get_dmv(s);
998 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
999 s->last_mv[i][0][1] >> my_shift);
1000 dmy = get_dmv(s);
1001
1002
1003 s->last_mv[i][0][1] = my << my_shift;
1004 s->last_mv[i][1][1] = my << my_shift;
1005
1006 s->mv[i][0][0] = mx;
1007 s->mv[i][0][1] = my;
1008 s->mv[i][1][0] = mx; // not used
1009 s->mv[i][1][1] = my; // not used
1010
1011 if (s->picture_structure == PICT_FRAME) {
1012 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1013
1014 // m = 1 + 2 * s->top_field_first;
1015 m = s->top_field_first ? 1 : 3;
1016
1017 /* top -> top pred */
1018 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1019 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1020 m = 4 - m;
1021 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1022 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1023 } else {
1024 mb_type |= MB_TYPE_16x16;
1025
1026 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1027 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1028 if (s->picture_structure == PICT_TOP_FIELD)
1029 s->mv[i][2][1]--;
1030 else
1031 s->mv[i][2][1]++;
1032 }
1033 }
1034 }
1035 break;
1036 default:
1037 av_log(s->avctx, AV_LOG_ERROR,
1038 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1039 return -1;
1040 }
1041 }
1042
1043 s->mb_intra = 0;
1044 if (HAS_CBP(mb_type)) {
1045 s->bdsp.clear_blocks(s->block[0]);
1046
1047 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1048 if (mb_block_count > 6) {
1049 cbp <<= mb_block_count - 6;
1050 cbp |= get_bits(&s->gb, mb_block_count - 6);
1051 s->bdsp.clear_blocks(s->block[6]);
1052 }
1053 if (cbp <= 0) {
1054 av_log(s->avctx, AV_LOG_ERROR,
1055 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1056 return -1;
1057 }
1058
1059 // if 1, we memcpy blocks in xvmcvideo
1060 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1061 ff_xvmc_pack_pblocks(s, cbp);
1062
1063 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1064 if (s->flags2 & CODEC_FLAG2_FAST) {
1065 for (i = 0; i < 6; i++) {
1066 if (cbp & 32)
1067 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1068 else
1069 s->block_last_index[i] = -1;
1070 cbp += cbp;
1071 }
1072 } else {
1073 cbp <<= 12 - mb_block_count;
1074
1075 for (i = 0; i < mb_block_count; i++) {
1076 if (cbp & (1 << 11)) {
1077 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1078 return -1;
1079 } else {
1080 s->block_last_index[i] = -1;
1081 }
1082 cbp += cbp;
1083 }
1084 }
1085 } else {
1086 if (s->flags2 & CODEC_FLAG2_FAST) {
1087 for (i = 0; i < 6; i++) {
1088 if (cbp & 32)
1089 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1090 else
1091 s->block_last_index[i] = -1;
1092 cbp += cbp;
1093 }
1094 } else {
1095 for (i = 0; i < 6; i++) {
1096 if (cbp & 32) {
1097 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1098 return -1;
1099 } else {
1100 s->block_last_index[i] = -1;
1101 }
1102 cbp += cbp;
1103 }
1104 }
1105 }
1106 } else {
1107 for (i = 0; i < 12; i++)
1108 s->block_last_index[i] = -1;
1109 }
1110 }
1111
1112 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1113
1114 return 0;
1115}
1116
1117static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1118{
1119 Mpeg1Context *s = avctx->priv_data;
1120 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1121
1122 ff_mpv_decode_defaults(s2);
1123 ff_mpv_decode_init(s2, avctx);
1124
1125 s->mpeg_enc_ctx.avctx = avctx;
1126
1127 /* we need some permutation to store matrices,
1128 * until the decoder sets the real permutation. */
1129 ff_mpv_idct_init(s2);
1130 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1131 ff_mpeg12_init_vlcs();
1132
1133 s->mpeg_enc_ctx_allocated = 0;
1134 s->mpeg_enc_ctx.picture_number = 0;
1135 s->repeat_field = 0;
1136 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1137 avctx->color_range = AVCOL_RANGE_MPEG;
1138 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1139 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1140 else
1141 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1142 return 0;
1143}
1144
1145static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1146 const AVCodecContext *avctx_from)
1147{
1148 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1149 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1150 int err;
1151
1152 if (avctx == avctx_from ||
1153 !ctx_from->mpeg_enc_ctx_allocated ||
1154 !s1->context_initialized)
1155 return 0;
1156
1157 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1158 if (err)
1159 return err;
1160
1161 if (!ctx->mpeg_enc_ctx_allocated)
1162 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1163
1164 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1165 s->picture_number++;
1166
1167 return 0;
1168}
1169
1170static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1171 const uint8_t *new_perm)
1172{
1173 uint16_t temp_matrix[64];
1174 int i;
1175
1176 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1177
1178 for (i = 0; i < 64; i++)
1179 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1180}
1181
1182static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1183#if CONFIG_MPEG1_XVMC_HWACCEL
1184 AV_PIX_FMT_XVMC,
1185#endif
1186#if CONFIG_MPEG1_VDPAU_HWACCEL
1187 AV_PIX_FMT_VDPAU_MPEG1,
1188 AV_PIX_FMT_VDPAU,
1189#endif
1190 AV_PIX_FMT_YUV420P,
1191 AV_PIX_FMT_NONE
1192};
1193
1194static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1195#if CONFIG_MPEG2_XVMC_HWACCEL
1196 AV_PIX_FMT_XVMC,
1197#endif
1198#if CONFIG_MPEG2_VDPAU_HWACCEL
1199 AV_PIX_FMT_VDPAU_MPEG2,
1200 AV_PIX_FMT_VDPAU,
1201#endif
1202#if CONFIG_MPEG2_DXVA2_HWACCEL
1203 AV_PIX_FMT_DXVA2_VLD,
1204#endif
1205#if CONFIG_MPEG2_VAAPI_HWACCEL
1206 AV_PIX_FMT_VAAPI_VLD,
1207#endif
1208 AV_PIX_FMT_YUV420P,
1209 AV_PIX_FMT_NONE
1210};
1211
1212static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1213 AV_PIX_FMT_YUV422P,
1214 AV_PIX_FMT_NONE
1215};
1216
1217static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1218 AV_PIX_FMT_YUV444P,
1219 AV_PIX_FMT_NONE
1220};
1221
1222static inline int uses_vdpau(AVCodecContext *avctx) {
1223 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1224}
1225
1226static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1227{
1228 Mpeg1Context *s1 = avctx->priv_data;
1229 MpegEncContext *s = &s1->mpeg_enc_ctx;
1230 const enum AVPixelFormat *pix_fmts;
1231
1232 if (s->chroma_format < 2)
1233 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1234 mpeg1_hwaccel_pixfmt_list_420 :
1235 mpeg2_hwaccel_pixfmt_list_420;
1236 else if (s->chroma_format == 2)
1237 pix_fmts = mpeg12_pixfmt_list_422;
1238 else
1239 pix_fmts = mpeg12_pixfmt_list_444;
1240
1241 return ff_thread_get_format(avctx, pix_fmts);
1242}
1243
1244static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1245{
1246 // until then pix_fmt may be changed right after codec init
1247 if (avctx->hwaccel || uses_vdpau(avctx))
1248 if (avctx->idct_algo == FF_IDCT_AUTO)
1249 avctx->idct_algo = FF_IDCT_SIMPLE;
1250
1251 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1252 Mpeg1Context *s1 = avctx->priv_data;
1253 MpegEncContext *s = &s1->mpeg_enc_ctx;
1254
1255 s->pack_pblocks = 1;
1256#if FF_API_XVMC
1257 avctx->xvmc_acceleration = 2;
1258#endif /* FF_API_XVMC */
1259 }
1260}
1261
1262/* Call this function when we know all parameters.
1263 * It may be called in different places for MPEG-1 and MPEG-2. */
1264static int mpeg_decode_postinit(AVCodecContext *avctx)
1265{
1266 Mpeg1Context *s1 = avctx->priv_data;
1267 MpegEncContext *s = &s1->mpeg_enc_ctx;
1268 uint8_t old_permutation[64];
1269 int ret;
1270
1271 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1272 avctx->coded_width != s->width ||
1273 avctx->coded_height != s->height ||
1274 s1->save_width != s->width ||
1275 s1->save_height != s->height ||
1276 s1->save_aspect_info != s->aspect_ratio_info ||
1277 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1278 0) {
1279 if (s1->mpeg_enc_ctx_allocated) {
1280 ParseContext pc = s->parse_context;
1281 s->parse_context.buffer = 0;
1282 ff_mpv_common_end(s);
1283 s->parse_context = pc;
1284 s1->mpeg_enc_ctx_allocated = 0;
1285 }
1286
1287 if ((s->width == 0) || (s->height == 0))
1288 return -2;
1289
1290 ret = ff_set_dimensions(avctx, s->width, s->height);
1291 if (ret < 0)
1292 return ret;
1293
1294 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1295 avctx->rc_max_rate = s->bit_rate;
1296 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1297 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1298 avctx->bit_rate = s->bit_rate;
1299 }
1300 s1->save_aspect_info = s->aspect_ratio_info;
1301 s1->save_width = s->width;
1302 s1->save_height = s->height;
1303 s1->save_progressive_seq = s->progressive_sequence;
1304
1305 /* low_delay may be forced, in this case we will have B-frames
1306 * that behave like P-frames. */
1307 avctx->has_b_frames = !s->low_delay;
1308
1309 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1310 // MPEG-1 fps
1311 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1312 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1313 // MPEG-1 aspect
1314 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1315 avctx->ticks_per_frame = 1;
1316 } else { // MPEG-2
1317 // MPEG-2 fps
1318 av_reduce(&s->avctx->time_base.den,
1319 &s->avctx->time_base.num,
1320 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num * 2,
1321 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1322 1 << 30);
1323 avctx->ticks_per_frame = 2;
1324 // MPEG-2 aspect
1325 if (s->aspect_ratio_info > 1) {
1326 AVRational dar =
1327 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1328 (AVRational) { s1->pan_scan.width,
1329 s1->pan_scan.height }),
1330 (AVRational) { s->width, s->height });
1331
1332 /* We ignore the spec here and guess a bit as reality does not
1333 * match the spec, see for example res_change_ffmpeg_aspect.ts
1334 * and sequence-display-aspect.mpg.
1335 * issue1613, 621, 562 */
1336 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1337 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1338 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1339 s->avctx->sample_aspect_ratio =
1340 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1341 (AVRational) { s->width, s->height });
1342 } else {
1343 s->avctx->sample_aspect_ratio =
1344 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1345 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1346// issue1613 4/3 16/9 -> 16/9
1347// res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1348// widescreen-issue562.mpg 4/3 16/9 -> 16/9
1349// s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1350 av_dlog(avctx, "A %d/%d\n",
1351 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1352 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1353 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1354 s->avctx->sample_aspect_ratio.den);
1355 }
1356 } else {
1357 s->avctx->sample_aspect_ratio =
1358 ff_mpeg2_aspect[s->aspect_ratio_info];
1359 }
1360 } // MPEG-2
1361
1362 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1363
1364 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1365 setup_hwaccel_for_pixfmt(avctx);
1366
1367 /* Quantization matrices may need reordering
1368 * if DCT permutation is changed. */
1369 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1370
1371 ff_mpv_idct_init(s);
1372 if (ff_mpv_common_init(s) < 0)
1373 return -2;
1374
1375 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1376 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1377 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1378 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1379
1380 s1->mpeg_enc_ctx_allocated = 1;
1381 }
1382 return 0;
1383}
1384
1385static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1386 int buf_size)
1387{
1388 Mpeg1Context *s1 = avctx->priv_data;
1389 MpegEncContext *s = &s1->mpeg_enc_ctx;
1390 int ref, f_code, vbv_delay;
1391
1392 init_get_bits(&s->gb, buf, buf_size * 8);
1393
1394 ref = get_bits(&s->gb, 10); /* temporal ref */
1395 s->pict_type = get_bits(&s->gb, 3);
1396 if (s->pict_type == 0 || s->pict_type > 3)
1397 return -1;
1398
1399 vbv_delay = get_bits(&s->gb, 16);
1400 s->vbv_delay = vbv_delay;
1401 if (s->pict_type == AV_PICTURE_TYPE_P ||
1402 s->pict_type == AV_PICTURE_TYPE_B) {
1403 s->full_pel[0] = get_bits1(&s->gb);
1404 f_code = get_bits(&s->gb, 3);
1405 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1406 return -1;
1407 f_code += !f_code;
1408 s->mpeg_f_code[0][0] = f_code;
1409 s->mpeg_f_code[0][1] = f_code;
1410 }
1411 if (s->pict_type == AV_PICTURE_TYPE_B) {
1412 s->full_pel[1] = get_bits1(&s->gb);
1413 f_code = get_bits(&s->gb, 3);
1414 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1415 return -1;
1416 f_code += !f_code;
1417 s->mpeg_f_code[1][0] = f_code;
1418 s->mpeg_f_code[1][1] = f_code;
1419 }
1420 s->current_picture.f->pict_type = s->pict_type;
1421 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1422
1423 if (avctx->debug & FF_DEBUG_PICT_INFO)
1424 av_log(avctx, AV_LOG_DEBUG,
1425 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1426
1427 s->y_dc_scale = 8;
1428 s->c_dc_scale = 8;
1429 return 0;
1430}
1431
1432static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1433{
1434 MpegEncContext *s = &s1->mpeg_enc_ctx;
1435 int horiz_size_ext, vert_size_ext;
1436 int bit_rate_ext;
1437
1438 skip_bits(&s->gb, 1); /* profile and level esc*/
1439 s->avctx->profile = get_bits(&s->gb, 3);
1440 s->avctx->level = get_bits(&s->gb, 4);
1441 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1442 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1443 horiz_size_ext = get_bits(&s->gb, 2);
1444 vert_size_ext = get_bits(&s->gb, 2);
1445 s->width |= (horiz_size_ext << 12);
1446 s->height |= (vert_size_ext << 12);
1447 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1448 s->bit_rate += (bit_rate_ext << 18) * 400;
1449 skip_bits1(&s->gb); /* marker */
1450 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1451
1452 s->low_delay = get_bits1(&s->gb);
1453 if (s->flags & CODEC_FLAG_LOW_DELAY)
1454 s->low_delay = 1;
1455
1456 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1457 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1458
1459 av_dlog(s->avctx, "sequence extension\n");
1460 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1461
1462 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1463 av_log(s->avctx, AV_LOG_DEBUG,
1464 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1465 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1466 s->avctx->rc_buffer_size, s->bit_rate);
1467}
1468
1469static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1470{
1471 MpegEncContext *s = &s1->mpeg_enc_ctx;
1472 int color_description, w, h;
1473
1474 skip_bits(&s->gb, 3); /* video format */
1475 color_description = get_bits1(&s->gb);
1476 if (color_description) {
1477 s->avctx->color_primaries = get_bits(&s->gb, 8);
1478 s->avctx->color_trc = get_bits(&s->gb, 8);
1479 s->avctx->colorspace = get_bits(&s->gb, 8);
1480 }
1481 w = get_bits(&s->gb, 14);
1482 skip_bits(&s->gb, 1); // marker
1483 h = get_bits(&s->gb, 14);
1484 // remaining 3 bits are zero padding
1485
1486 s1->pan_scan.width = 16 * w;
1487 s1->pan_scan.height = 16 * h;
1488
1489 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1490 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1491}
1492
1493static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1494{
1495 MpegEncContext *s = &s1->mpeg_enc_ctx;
1496 int i, nofco;
1497
1498 nofco = 1;
1499 if (s->progressive_sequence) {
1500 if (s->repeat_first_field) {
1501 nofco++;
1502 if (s->top_field_first)
1503 nofco++;
1504 }
1505 } else {
1506 if (s->picture_structure == PICT_FRAME) {
1507 nofco++;
1508 if (s->repeat_first_field)
1509 nofco++;
1510 }
1511 }
1512 for (i = 0; i < nofco; i++) {
1513 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1514 skip_bits(&s->gb, 1); // marker
1515 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1516 skip_bits(&s->gb, 1); // marker
1517 }
1518
1519 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1520 av_log(s->avctx, AV_LOG_DEBUG,
1521 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1522 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1523 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1524 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1525}
1526
1527static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1528 uint16_t matrix1[64], int intra)
1529{
1530 int i;
1531
1532 for (i = 0; i < 64; i++) {
1533 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1534 int v = get_bits(&s->gb, 8);
1535 if (v == 0) {
1536 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1537 return -1;
1538 }
1539 if (intra && i == 0 && v != 8) {
1540 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1541 v = 8; // needed by pink.mpg / issue1046
1542 }
1543 matrix0[j] = v;
1544 if (matrix1)
1545 matrix1[j] = v;
1546 }
1547 return 0;
1548}
1549
1550static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1551{
1552 av_dlog(s->avctx, "matrix extension\n");
1553
1554 if (get_bits1(&s->gb))
1555 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1556 if (get_bits1(&s->gb))
1557 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1558 if (get_bits1(&s->gb))
1559 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1560 if (get_bits1(&s->gb))
1561 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1562}
1563
1564static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1565{
1566 MpegEncContext *s = &s1->mpeg_enc_ctx;
1567
1568 s->full_pel[0] = s->full_pel[1] = 0;
1569 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1570 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1571 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1572 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1573 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1574 av_log(s->avctx, AV_LOG_ERROR,
1575 "Missing picture start code, guessing missing values\n");
1576 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1577 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1578 s->pict_type = AV_PICTURE_TYPE_I;
1579 else
1580 s->pict_type = AV_PICTURE_TYPE_P;
1581 } else
1582 s->pict_type = AV_PICTURE_TYPE_B;
1583 s->current_picture.f->pict_type = s->pict_type;
1584 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1585 }
1586 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1587 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1588 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1589 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1590
1591 s->intra_dc_precision = get_bits(&s->gb, 2);
1592 s->picture_structure = get_bits(&s->gb, 2);
1593 s->top_field_first = get_bits1(&s->gb);
1594 s->frame_pred_frame_dct = get_bits1(&s->gb);
1595 s->concealment_motion_vectors = get_bits1(&s->gb);
1596 s->q_scale_type = get_bits1(&s->gb);
1597 s->intra_vlc_format = get_bits1(&s->gb);
1598 s->alternate_scan = get_bits1(&s->gb);
1599 s->repeat_first_field = get_bits1(&s->gb);
1600 s->chroma_420_type = get_bits1(&s->gb);
1601 s->progressive_frame = get_bits1(&s->gb);
1602
1603 if (s->alternate_scan) {
1604 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1605 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1606 } else {
1607 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1608 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1609 }
1610
1611 /* composite display not parsed */
1612 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1613 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1614 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1615 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1616 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1617 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1618 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1619 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1620 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1621}
1622
1623static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1624{
1625 AVCodecContext *avctx = s->avctx;
1626 Mpeg1Context *s1 = (Mpeg1Context *) s;
1627
1628 /* start frame decoding */
1629 if (s->first_field || s->picture_structure == PICT_FRAME) {
1630 AVFrameSideData *pan_scan;
1631
1632 if (ff_mpv_frame_start(s, avctx) < 0)
1633 return -1;
1634
1635 ff_mpeg_er_frame_start(s);
1636
1637 /* first check if we must repeat the frame */
1638 s->current_picture_ptr->f->repeat_pict = 0;
1639 if (s->repeat_first_field) {
1640 if (s->progressive_sequence) {
1641 if (s->top_field_first)
1642 s->current_picture_ptr->f->repeat_pict = 4;
1643 else
1644 s->current_picture_ptr->f->repeat_pict = 2;
1645 } else if (s->progressive_frame) {
1646 s->current_picture_ptr->f->repeat_pict = 1;
1647 }
1648 }
1649
1650 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1651 AV_FRAME_DATA_PANSCAN,
1652 sizeof(s1->pan_scan));
1653 if (!pan_scan)
1654 return AVERROR(ENOMEM);
1655 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1656
1657 if (s1->a53_caption) {
1658 AVFrameSideData *sd = av_frame_new_side_data(
1659 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1660 s1->a53_caption_size);
1661 if (sd)
1662 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1663 av_freep(&s1->a53_caption);
1664 }
1665
1666 if (s1->has_stereo3d) {
1667 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1668 if (!stereo)
1669 return AVERROR(ENOMEM);
1670
1671 *stereo = s1->stereo3d;
1672 s1->has_stereo3d = 0;
1673 }
1674
1675 if (s1->has_afd) {
1676 AVFrameSideData *sd =
1677 av_frame_new_side_data(s->current_picture_ptr->f,
1678 AV_FRAME_DATA_AFD, 1);
1679 if (!sd)
1680 return AVERROR(ENOMEM);
1681
1682 *sd->data = s1->afd;
1683 s1->has_afd = 0;
1684 }
1685
1686 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1687 ff_thread_finish_setup(avctx);
1688 } else { // second field
1689 int i;
1690
1691 if (!s->current_picture_ptr) {
1692 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1693 return -1;
1694 }
1695
1696 if (s->avctx->hwaccel &&
1697 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1698 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1699 av_log(avctx, AV_LOG_ERROR,
1700 "hardware accelerator failed to decode first field\n");
1701 }
1702
1703 for (i = 0; i < 4; i++) {
1704 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1705 if (s->picture_structure == PICT_BOTTOM_FIELD)
1706 s->current_picture.f->data[i] +=
1707 s->current_picture_ptr->f->linesize[i];
1708 }
1709 }
1710
1711 if (avctx->hwaccel) {
1712 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1713 return -1;
1714 }
1715
1716 return 0;
1717}
1718
1719#define DECODE_SLICE_ERROR -1
1720#define DECODE_SLICE_OK 0
1721
1722/**
1723 * Decode a slice.
1724 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1725 * @return DECODE_SLICE_ERROR if the slice is damaged,
1726 * DECODE_SLICE_OK if this slice is OK
1727 */
1728static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1729 const uint8_t **buf, int buf_size)
1730{
1731 AVCodecContext *avctx = s->avctx;
1732 const int lowres = s->avctx->lowres;
1733 const int field_pic = s->picture_structure != PICT_FRAME;
1734
1735 s->resync_mb_x =
1736 s->resync_mb_y = -1;
1737
1738 av_assert0(mb_y < s->mb_height);
1739
1740 init_get_bits(&s->gb, *buf, buf_size * 8);
1741 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1742 skip_bits(&s->gb, 3);
1743
1744 ff_mpeg1_clean_buffers(s);
1745 s->interlaced_dct = 0;
1746
1747 s->qscale = get_qscale(s);
1748
1749 if (s->qscale == 0) {
1750 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1751 return -1;
1752 }
1753
1754 /* extra slice info */
1755 if (skip_1stop_8data_bits(&s->gb) < 0)
1756 return AVERROR_INVALIDDATA;
1757
1758 s->mb_x = 0;
1759
1760 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1761 skip_bits1(&s->gb);
1762 } else {
1763 while (get_bits_left(&s->gb) > 0) {
1764 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1765 MBINCR_VLC_BITS, 2);
1766 if (code < 0) {
1767 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1768 return -1;
1769 }
1770 if (code >= 33) {
1771 if (code == 33)
1772 s->mb_x += 33;
1773 /* otherwise, stuffing, nothing to do */
1774 } else {
1775 s->mb_x += code;
1776 break;
1777 }
1778 }
1779 }
1780
1781 if (s->mb_x >= (unsigned) s->mb_width) {
1782 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1783 return -1;
1784 }
1785
1786 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1787 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1788 int start_code = -1;
1789 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1790 if (buf_end < *buf + buf_size)
1791 buf_end -= 4;
1792 s->mb_y = mb_y;
1793 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1794 return DECODE_SLICE_ERROR;
1795 *buf = buf_end;
1796 return DECODE_SLICE_OK;
1797 }
1798
1799 s->resync_mb_x = s->mb_x;
1800 s->resync_mb_y = s->mb_y = mb_y;
1801 s->mb_skip_run = 0;
1802 ff_init_block_index(s);
1803
1804 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1805 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1806 av_log(s->avctx, AV_LOG_DEBUG,
1807 "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",
1808 s->qscale,
1809 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1810 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1811 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1812 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1813 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1814 s->progressive_sequence ? "ps" : "",
1815 s->progressive_frame ? "pf" : "",
1816 s->alternate_scan ? "alt" : "",
1817 s->top_field_first ? "top" : "",
1818 s->intra_dc_precision, s->picture_structure,
1819 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1820 s->q_scale_type, s->intra_vlc_format,
1821 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1822 }
1823 }
1824
1825 for (;;) {
1826 // If 1, we memcpy blocks in xvmcvideo.
1827 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1828 ff_xvmc_init_block(s); // set s->block
1829
1830 if (mpeg_decode_mb(s, s->block) < 0)
1831 return -1;
1832
1833 // Note motion_val is normally NULL unless we want to extract the MVs.
1834 if (s->current_picture.motion_val[0] && !s->encoding) {
1835 const int wrap = s->b8_stride;
1836 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1837 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1838 int motion_x, motion_y, dir, i;
1839
1840 for (i = 0; i < 2; i++) {
1841 for (dir = 0; dir < 2; dir++) {
1842 if (s->mb_intra ||
1843 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1844 motion_x = motion_y = 0;
1845 } else if (s->mv_type == MV_TYPE_16X16 ||
1846 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1847 motion_x = s->mv[dir][0][0];
1848 motion_y = s->mv[dir][0][1];
1849 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1850 motion_x = s->mv[dir][i][0];
1851 motion_y = s->mv[dir][i][1];
1852 }
1853
1854 s->current_picture.motion_val[dir][xy][0] = motion_x;
1855 s->current_picture.motion_val[dir][xy][1] = motion_y;
1856 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1857 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1858 s->current_picture.ref_index [dir][b8_xy] =
1859 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1860 av_assert2(s->field_select[dir][i] == 0 ||
1861 s->field_select[dir][i] == 1);
1862 }
1863 xy += wrap;
1864 b8_xy += 2;
1865 }
1866 }
1867
1868 s->dest[0] += 16 >> lowres;
1869 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1870 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1871
1872 ff_mpv_decode_mb(s, s->block);
1873
1874 if (++s->mb_x >= s->mb_width) {
1875 const int mb_size = 16 >> s->avctx->lowres;
1876
1877 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1878 ff_mpv_report_decode_progress(s);
1879
1880 s->mb_x = 0;
1881 s->mb_y += 1 << field_pic;
1882
1883 if (s->mb_y >= s->mb_height) {
1884 int left = get_bits_left(&s->gb);
1885 int is_d10 = s->chroma_format == 2 &&
1886 s->pict_type == AV_PICTURE_TYPE_I &&
1887 avctx->profile == 0 && avctx->level == 5 &&
1888 s->intra_dc_precision == 2 &&
1889 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1890 s->progressive_frame == 0
1891 /* vbv_delay == 0xBBB || 0xE10 */;
1892
1893 if (left >= 32 && !is_d10) {
1894 GetBitContext gb = s->gb;
1895 align_get_bits(&gb);
1896 if (show_bits(&gb, 24) == 0x060E2B) {
1897 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1898 is_d10 = 1;
1899 }
1900 }
1901
1902 if (left < 0 ||
1903 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1904 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1905 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1906 left, show_bits(&s->gb, FFMIN(left, 23)));
1907 return -1;
1908 } else
1909 goto eos;
1910 }
1911 // There are some files out there which are missing the last slice
1912 // in cases where the slice is completely outside the visible
1913 // area, we detect this here instead of running into the end expecting
1914 // more data
1915 if (s->mb_y >= ((s->height + 15) >> 4) &&
1916 s->progressive_frame &&
1917 !s->progressive_sequence &&
1918 get_bits_left(&s->gb) <= 8 &&
1919 get_bits_left(&s->gb) >= 0 &&
1920 s->mb_skip_run == -1 &&
1921 show_bits(&s->gb, 8) == 0)
1922 goto eos;
1923
1924 ff_init_block_index(s);
1925 }
1926
1927 /* skip mb handling */
1928 if (s->mb_skip_run == -1) {
1929 /* read increment again */
1930 s->mb_skip_run = 0;
1931 for (;;) {
1932 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1933 MBINCR_VLC_BITS, 2);
1934 if (code < 0) {
1935 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1936 return -1;
1937 }
1938 if (code >= 33) {
1939 if (code == 33) {
1940 s->mb_skip_run += 33;
1941 } else if (code == 35) {
1942 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1943 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1944 return -1;
1945 }
1946 goto eos; /* end of slice */
1947 }
1948 /* otherwise, stuffing, nothing to do */
1949 } else {
1950 s->mb_skip_run += code;
1951 break;
1952 }
1953 }
1954 if (s->mb_skip_run) {
1955 int i;
1956 if (s->pict_type == AV_PICTURE_TYPE_I) {
1957 av_log(s->avctx, AV_LOG_ERROR,
1958 "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1959 return -1;
1960 }
1961
1962 /* skip mb */
1963 s->mb_intra = 0;
1964 for (i = 0; i < 12; i++)
1965 s->block_last_index[i] = -1;
1966 if (s->picture_structure == PICT_FRAME)
1967 s->mv_type = MV_TYPE_16X16;
1968 else
1969 s->mv_type = MV_TYPE_FIELD;
1970 if (s->pict_type == AV_PICTURE_TYPE_P) {
1971 /* if P type, zero motion vector is implied */
1972 s->mv_dir = MV_DIR_FORWARD;
1973 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1974 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1975 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1976 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1977 } else {
1978 /* if B type, reuse previous vectors and directions */
1979 s->mv[0][0][0] = s->last_mv[0][0][0];
1980 s->mv[0][0][1] = s->last_mv[0][0][1];
1981 s->mv[1][0][0] = s->last_mv[1][0][0];
1982 s->mv[1][0][1] = s->last_mv[1][0][1];
1983 }
1984 }
1985 }
1986 }
1987eos: // end of slice
1988 if (get_bits_left(&s->gb) < 0) {
1989 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1990 return AVERROR_INVALIDDATA;
1991 }
1992 *buf += (get_bits_count(&s->gb) - 1) / 8;
1993 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1994 return 0;
1995}
1996
1997static int slice_decode_thread(AVCodecContext *c, void *arg)
1998{
1999 MpegEncContext *s = *(void **) arg;
2000 const uint8_t *buf = s->gb.buffer;
2001 int mb_y = s->start_mb_y;
2002 const int field_pic = s->picture_structure != PICT_FRAME;
2003
2004 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2005
2006 for (;;) {
2007 uint32_t start_code;
2008 int ret;
2009
2010 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2011 emms_c();
2012 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2013 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2014 s->start_mb_y, s->end_mb_y, s->er.error_count);
2015 if (ret < 0) {
2016 if (c->err_recognition & AV_EF_EXPLODE)
2017 return ret;
2018 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2019 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2020 s->mb_x, s->mb_y,
2021 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2022 } else {
2023 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2024 s->mb_x - 1, s->mb_y,
2025 ER_AC_END | ER_DC_END | ER_MV_END);
2026 }
2027
2028 if (s->mb_y == s->end_mb_y)
2029 return 0;
2030
2031 start_code = -1;
2032 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2033 mb_y = start_code - SLICE_MIN_START_CODE;
2034 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2035 mb_y += (*buf&0xE0)<<2;
2036 mb_y <<= field_pic;
2037 if (s->picture_structure == PICT_BOTTOM_FIELD)
2038 mb_y++;
2039 if (mb_y < 0 || mb_y >= s->end_mb_y)
2040 return -1;
2041 }
2042}
2043
2044/**
2045 * Handle slice ends.
2046 * @return 1 if it seems to be the last slice
2047 */
2048static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2049{
2050 Mpeg1Context *s1 = avctx->priv_data;
2051 MpegEncContext *s = &s1->mpeg_enc_ctx;
2052
2053 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2054 return 0;
2055
2056 if (s->avctx->hwaccel) {
2057 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
2058 av_log(avctx, AV_LOG_ERROR,
2059 "hardware accelerator failed to decode picture\n");
2060 }
2061
2062 /* end of slice reached */
2063 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2064 /* end of image */
2065
2066 ff_er_frame_end(&s->er);
2067
2068 ff_mpv_frame_end(s);
2069
2070 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2071 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2072 if (ret < 0)
2073 return ret;
2074 ff_print_debug_info(s, s->current_picture_ptr, pict);
2075 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2076 } else {
2077 if (avctx->active_thread_type & FF_THREAD_FRAME)
2078 s->picture_number++;
2079 /* latency of 1 frame for I- and P-frames */
2080 /* XXX: use another variable than picture_number */
2081 if (s->last_picture_ptr) {
2082 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2083 if (ret < 0)
2084 return ret;
2085 ff_print_debug_info(s, s->last_picture_ptr, pict);
2086 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2087 }
2088 }
2089
2090 return 1;
2091 } else {
2092 return 0;
2093 }
2094}
2095
2096static int mpeg1_decode_sequence(AVCodecContext *avctx,
2097 const uint8_t *buf, int buf_size)
2098{
2099 Mpeg1Context *s1 = avctx->priv_data;
2100 MpegEncContext *s = &s1->mpeg_enc_ctx;
2101 int width, height;
2102 int i, v, j;
2103
2104 init_get_bits(&s->gb, buf, buf_size * 8);
2105
2106 width = get_bits(&s->gb, 12);
2107 height = get_bits(&s->gb, 12);
2108 if (width == 0 || height == 0) {
2109 av_log(avctx, AV_LOG_WARNING,
2110 "Invalid horizontal or vertical size value.\n");
2111 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2112 return AVERROR_INVALIDDATA;
2113 }
2114 s->aspect_ratio_info = get_bits(&s->gb, 4);
2115 if (s->aspect_ratio_info == 0) {
2116 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2117 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2118 return -1;
2119 }
2120 s->frame_rate_index = get_bits(&s->gb, 4);
2121 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2122 return -1;
2123 s->bit_rate = get_bits(&s->gb, 18) * 400;
2124 if (get_bits1(&s->gb) == 0) /* marker */
2125 return -1;
2126 s->width = width;
2127 s->height = height;
2128
2129 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2130 skip_bits(&s->gb, 1);
2131
2132 /* get matrix */
2133 if (get_bits1(&s->gb)) {
2134 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2135 } else {
2136 for (i = 0; i < 64; i++) {
2137 j = s->idsp.idct_permutation[i];
2138 v = ff_mpeg1_default_intra_matrix[i];
2139 s->intra_matrix[j] = v;
2140 s->chroma_intra_matrix[j] = v;
2141 }
2142 }
2143 if (get_bits1(&s->gb)) {
2144 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2145 } else {
2146 for (i = 0; i < 64; i++) {
2147 int j = s->idsp.idct_permutation[i];
2148 v = ff_mpeg1_default_non_intra_matrix[i];
2149 s->inter_matrix[j] = v;
2150 s->chroma_inter_matrix[j] = v;
2151 }
2152 }
2153
2154 if (show_bits(&s->gb, 23) != 0) {
2155 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2156 return -1;
2157 }
2158
2159 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2160 s->progressive_sequence = 1;
2161 s->progressive_frame = 1;
2162 s->picture_structure = PICT_FRAME;
2163 s->first_field = 0;
2164 s->frame_pred_frame_dct = 1;
2165 s->chroma_format = 1;
2166 s->codec_id =
2167 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2168 s->out_format = FMT_MPEG1;
2169 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2170 if (s->flags & CODEC_FLAG_LOW_DELAY)
2171 s->low_delay = 1;
2172
2173 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2174 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2175 s->avctx->rc_buffer_size, s->bit_rate);
2176
2177 return 0;
2178}
2179
2180static int vcr2_init_sequence(AVCodecContext *avctx)
2181{
2182 Mpeg1Context *s1 = avctx->priv_data;
2183 MpegEncContext *s = &s1->mpeg_enc_ctx;
2184 int i, v;
2185
2186 /* start new MPEG-1 context decoding */
2187 s->out_format = FMT_MPEG1;
2188 if (s1->mpeg_enc_ctx_allocated) {
2189 ff_mpv_common_end(s);
2190 s1->mpeg_enc_ctx_allocated = 0;
2191 }
2192 s->width = avctx->coded_width;
2193 s->height = avctx->coded_height;
2194 avctx->has_b_frames = 0; // true?
2195 s->low_delay = 1;
2196
2197 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2198 setup_hwaccel_for_pixfmt(avctx);
2199
2200 ff_mpv_idct_init(s);
2201 if (ff_mpv_common_init(s) < 0)
2202 return -1;
2203 s1->mpeg_enc_ctx_allocated = 1;
2204
2205 for (i = 0; i < 64; i++) {
2206 int j = s->idsp.idct_permutation[i];
2207 v = ff_mpeg1_default_intra_matrix[i];
2208 s->intra_matrix[j] = v;
2209 s->chroma_intra_matrix[j] = v;
2210
2211 v = ff_mpeg1_default_non_intra_matrix[i];
2212 s->inter_matrix[j] = v;
2213 s->chroma_inter_matrix[j] = v;
2214 }
2215
2216 s->progressive_sequence = 1;
2217 s->progressive_frame = 1;
2218 s->picture_structure = PICT_FRAME;
2219 s->first_field = 0;
2220 s->frame_pred_frame_dct = 1;
2221 s->chroma_format = 1;
2222 if (s->codec_tag == AV_RL32("BW10")) {
2223 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2224 } else {
2225 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2226 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2227 }
2228 s1->save_width = s->width;
2229 s1->save_height = s->height;
2230 s1->save_progressive_seq = s->progressive_sequence;
2231 return 0;
2232}
2233
2234static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2235 const uint8_t *p, int buf_size)
2236{
2237 Mpeg1Context *s1 = avctx->priv_data;
2238
2239 if (buf_size >= 6 &&
2240 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2241 p[4] == 3 && (p[5] & 0x40)) {
2242 /* extract A53 Part 4 CC data */
2243 int cc_count = p[5] & 0x1f;
2244 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2245 av_freep(&s1->a53_caption);
2246 s1->a53_caption_size = cc_count * 3;
2247 s1->a53_caption = av_malloc(s1->a53_caption_size);
2248 if (s1->a53_caption)
2249 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2250 }
2251 return 1;
2252 } else if (buf_size >= 11 &&
2253 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2254 /* extract DVD CC data */
2255 int cc_count = 0;
2256 int i;
2257 // There is a caption count field in the data, but it is often
2258 // incorect. So count the number of captions present.
2259 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2260 cc_count++;
2261 // Transform the DVD format into A53 Part 4 format
2262 if (cc_count > 0) {
2263 av_freep(&s1->a53_caption);
2264 s1->a53_caption_size = cc_count * 6;
2265 s1->a53_caption = av_malloc(s1->a53_caption_size);
2266 if (s1->a53_caption) {
2267 uint8_t field1 = !!(p[4] & 0x80);
2268 uint8_t *cap = s1->a53_caption;
2269 p += 5;
2270 for (i = 0; i < cc_count; i++) {
2271 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2272 cap[1] = p[1];
2273 cap[2] = p[2];
2274 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2275 cap[4] = p[4];
2276 cap[5] = p[5];
2277 cap += 6;
2278 p += 6;
2279 }
2280 }
2281 }
2282 return 1;
2283 }
2284 return 0;
2285}
2286
2287static void mpeg_decode_user_data(AVCodecContext *avctx,
2288 const uint8_t *p, int buf_size)
2289{
2290 Mpeg1Context *s = avctx->priv_data;
2291 const uint8_t *buf_end = p + buf_size;
2292 Mpeg1Context *s1 = avctx->priv_data;
2293
2294 if (buf_size > 29){
2295 int i;
2296 for(i=0; i<20; i++)
2297 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2298 s->tmpgexs= 1;
2299 }
2300
2301/* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2302 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2303 }
2304 av_log(avctx, AV_LOG_ERROR, "\n");*/
2305 }
2306
2307 /* we parse the DTG active format information */
2308 if (buf_end - p >= 5 &&
2309 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2310 int flags = p[4];
2311 p += 5;
2312 if (flags & 0x80) {
2313 /* skip event id */
2314 p += 2;
2315 }
2316 if (flags & 0x40) {
2317 if (buf_end - p < 1)
2318 return;
2319#if FF_API_AFD
2320FF_DISABLE_DEPRECATION_WARNINGS
2321 avctx->dtg_active_format = p[0] & 0x0f;
2322FF_ENABLE_DEPRECATION_WARNINGS
2323#endif /* FF_API_AFD */
2324 s1->has_afd = 1;
2325 s1->afd = p[0] & 0x0f;
2326 }
2327 } else if (buf_end - p >= 6 &&
2328 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2329 p[4] == 0x03) { // S3D_video_format_length
2330 // the 0x7F mask ignores the reserved_bit value
2331 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2332
2333 if (S3D_video_format_type == 0x03 ||
2334 S3D_video_format_type == 0x04 ||
2335 S3D_video_format_type == 0x08 ||
2336 S3D_video_format_type == 0x23) {
2337
2338 s1->has_stereo3d = 1;
2339
2340 switch (S3D_video_format_type) {
2341 case 0x03:
2342 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2343 break;
2344 case 0x04:
2345 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2346 break;
2347 case 0x08:
2348 s1->stereo3d.type = AV_STEREO3D_2D;
2349 break;
2350 case 0x23:
2351 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2352 break;
2353 }
2354 }
2355 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2356 return;
2357 }
2358}
2359
2360static void mpeg_decode_gop(AVCodecContext *avctx,
2361 const uint8_t *buf, int buf_size)
2362{
2363 Mpeg1Context *s1 = avctx->priv_data;
2364 MpegEncContext *s = &s1->mpeg_enc_ctx;
2365 int broken_link;
2366 int64_t tc;
2367
2368 init_get_bits(&s->gb, buf, buf_size * 8);
2369
2370 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2371
2372 s->closed_gop = get_bits1(&s->gb);
2373 /* broken_link indicate that after editing the
2374 * reference frames of the first B-Frames after GOP I-Frame
2375 * are missing (open gop) */
2376 broken_link = get_bits1(&s->gb);
2377
2378 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2379 char tcbuf[AV_TIMECODE_STR_SIZE];
2380 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2381 av_log(s->avctx, AV_LOG_DEBUG,
2382 "GOP (%s) closed_gop=%d broken_link=%d\n",
2383 tcbuf, s->closed_gop, broken_link);
2384 }
2385}
2386
2387static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2388 int *got_output, const uint8_t *buf, int buf_size)
2389{
2390 Mpeg1Context *s = avctx->priv_data;
2391 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2392 const uint8_t *buf_ptr = buf;
2393 const uint8_t *buf_end = buf + buf_size;
2394 int ret, input_size;
2395 int last_code = 0, skip_frame = 0;
2396 int picture_start_code_seen = 0;
2397
2398 for (;;) {
2399 /* find next start code */
2400 uint32_t start_code = -1;
2401 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2402 if (start_code > 0x1ff) {
2403 if (!skip_frame) {
2404 if (HAVE_THREADS &&
2405 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2406 !avctx->hwaccel) {
2407 int i;
2408 av_assert0(avctx->thread_count > 1);
2409
2410 avctx->execute(avctx, slice_decode_thread,
2411 &s2->thread_context[0], NULL,
2412 s->slice_count, sizeof(void *));
2413 for (i = 0; i < s->slice_count; i++)
2414 s2->er.error_count += s2->thread_context[i]->er.error_count;
2415 }
2416
2417 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2418 && uses_vdpau(avctx))
2419 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2420
2421 ret = slice_end(avctx, picture);
2422 if (ret < 0)
2423 return ret;
2424 else if (ret) {
2425 // FIXME: merge with the stuff in mpeg_decode_slice
2426 if (s2->last_picture_ptr || s2->low_delay)
2427 *got_output = 1;
2428 }
2429 }
2430 s2->pict_type = 0;
2431
2432 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2433 return AVERROR_INVALIDDATA;
2434
2435 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2436 }
2437
2438 input_size = buf_end - buf_ptr;
2439
2440 if (avctx->debug & FF_DEBUG_STARTCODE)
2441 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2442 start_code, buf_ptr - buf, input_size);
2443
2444 /* prepare data for next start code */
2445 switch (start_code) {
2446 case SEQ_START_CODE:
2447 if (last_code == 0) {
2448 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2449 if (buf != avctx->extradata)
2450 s->sync = 1;
2451 } else {
2452 av_log(avctx, AV_LOG_ERROR,
2453 "ignoring SEQ_START_CODE after %X\n", last_code);
2454 if (avctx->err_recognition & AV_EF_EXPLODE)
2455 return AVERROR_INVALIDDATA;
2456 }
2457 break;
2458
2459 case PICTURE_START_CODE:
2460 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2461 /* If it's a frame picture, there can't be more than one picture header.
2462 Yet, it does happen and we need to handle it. */
2463 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2464 break;
2465 }
2466 picture_start_code_seen = 1;
2467
2468 if (s2->width <= 0 || s2->height <= 0) {
2469 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2470 s2->width, s2->height);
2471 return AVERROR_INVALIDDATA;
2472 }
2473
2474 if (s->tmpgexs){
2475 s2->intra_dc_precision= 3;
2476 s2->intra_matrix[0]= 1;
2477 }
2478 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2479 !avctx->hwaccel && s->slice_count) {
2480 int i;
2481
2482 avctx->execute(avctx, slice_decode_thread,
2483 s2->thread_context, NULL,
2484 s->slice_count, sizeof(void *));
2485 for (i = 0; i < s->slice_count; i++)
2486 s2->er.error_count += s2->thread_context[i]->er.error_count;
2487 s->slice_count = 0;
2488 }
2489 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2490 ret = mpeg_decode_postinit(avctx);
2491 if (ret < 0) {
2492 av_log(avctx, AV_LOG_ERROR,
2493 "mpeg_decode_postinit() failure\n");
2494 return ret;
2495 }
2496
2497 /* We have a complete image: we try to decompress it. */
2498 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2499 s2->pict_type = 0;
2500 s->first_slice = 1;
2501 last_code = PICTURE_START_CODE;
2502 } else {
2503 av_log(avctx, AV_LOG_ERROR,
2504 "ignoring pic after %X\n", last_code);
2505 if (avctx->err_recognition & AV_EF_EXPLODE)
2506 return AVERROR_INVALIDDATA;
2507 }
2508 break;
2509 case EXT_START_CODE:
2510 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2511
2512 switch (get_bits(&s2->gb, 4)) {
2513 case 0x1:
2514 if (last_code == 0) {
2515 mpeg_decode_sequence_extension(s);
2516 } else {
2517 av_log(avctx, AV_LOG_ERROR,
2518 "ignoring seq ext after %X\n", last_code);
2519 if (avctx->err_recognition & AV_EF_EXPLODE)
2520 return AVERROR_INVALIDDATA;
2521 }
2522 break;
2523 case 0x2:
2524 mpeg_decode_sequence_display_extension(s);
2525 break;
2526 case 0x3:
2527 mpeg_decode_quant_matrix_extension(s2);
2528 break;
2529 case 0x7:
2530 mpeg_decode_picture_display_extension(s);
2531 break;
2532 case 0x8:
2533 if (last_code == PICTURE_START_CODE) {
2534 mpeg_decode_picture_coding_extension(s);
2535 } else {
2536 av_log(avctx, AV_LOG_ERROR,
2537 "ignoring pic cod ext after %X\n", last_code);
2538 if (avctx->err_recognition & AV_EF_EXPLODE)
2539 return AVERROR_INVALIDDATA;
2540 }
2541 break;
2542 }
2543 break;
2544 case USER_START_CODE:
2545 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2546 break;
2547 case GOP_START_CODE:
2548 if (last_code == 0) {
2549 s2->first_field = 0;
2550 mpeg_decode_gop(avctx, buf_ptr, input_size);
2551 s->sync = 1;
2552 } else {
2553 av_log(avctx, AV_LOG_ERROR,
2554 "ignoring GOP_START_CODE after %X\n", last_code);
2555 if (avctx->err_recognition & AV_EF_EXPLODE)
2556 return AVERROR_INVALIDDATA;
2557 }
2558 break;
2559 default:
2560 if (start_code >= SLICE_MIN_START_CODE &&
2561 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2562 if (s2->progressive_sequence && !s2->progressive_frame) {
2563 s2->progressive_frame = 1;
2564 av_log(s2->avctx, AV_LOG_ERROR,
2565 "interlaced frame in progressive sequence, ignoring\n");
2566 }
2567
2568 if (s2->picture_structure == 0 ||
2569 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2570 av_log(s2->avctx, AV_LOG_ERROR,
2571 "picture_structure %d invalid, ignoring\n",
2572 s2->picture_structure);
2573 s2->picture_structure = PICT_FRAME;
2574 }
2575
2576 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2577 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2578
2579 if (s2->picture_structure == PICT_FRAME) {
2580 s2->first_field = 0;
2581 s2->v_edge_pos = 16 * s2->mb_height;
2582 } else {
2583 s2->first_field ^= 1;
2584 s2->v_edge_pos = 8 * s2->mb_height;
2585 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2586 }
2587 }
2588 if (start_code >= SLICE_MIN_START_CODE &&
2589 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2590 const int field_pic = s2->picture_structure != PICT_FRAME;
2591 int mb_y = start_code - SLICE_MIN_START_CODE;
2592 last_code = SLICE_MIN_START_CODE;
2593 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2594 mb_y += (*buf_ptr&0xE0)<<2;
2595
2596 mb_y <<= field_pic;
2597 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2598 mb_y++;
2599
2600 if (buf_end - buf_ptr < 2) {
2601 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2602 return AVERROR_INVALIDDATA;
2603 }
2604
2605 if (mb_y >= s2->mb_height) {
2606 av_log(s2->avctx, AV_LOG_ERROR,
2607 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2608 return -1;
2609 }
2610
2611 if (!s2->last_picture_ptr) {
2612 /* Skip B-frames if we do not have reference frames and
2613 * GOP is not closed. */
2614 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2615 if (!s2->closed_gop) {
2616 skip_frame = 1;
2617 break;
2618 }
2619 }
2620 }
2621 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2622 s->sync = 1;
2623 if (!s2->next_picture_ptr) {
2624 /* Skip P-frames if we do not have a reference frame or
2625 * we have an invalid header. */
2626 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2627 skip_frame = 1;
2628 break;
2629 }
2630 }
2631 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2632 s2->pict_type == AV_PICTURE_TYPE_B) ||
2633 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2634 s2->pict_type != AV_PICTURE_TYPE_I) ||
2635 avctx->skip_frame >= AVDISCARD_ALL) {
2636 skip_frame = 1;
2637 break;
2638 }
2639
2640 if (!s->mpeg_enc_ctx_allocated)
2641 break;
2642
2643 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2644 if (mb_y < avctx->skip_top ||
2645 mb_y >= s2->mb_height - avctx->skip_bottom)
2646 break;
2647 }
2648
2649 if (!s2->pict_type) {
2650 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2651 if (avctx->err_recognition & AV_EF_EXPLODE)
2652 return AVERROR_INVALIDDATA;
2653 break;
2654 }
2655
2656 if (s->first_slice) {
2657 skip_frame = 0;
2658 s->first_slice = 0;
2659 if (mpeg_field_start(s2, buf, buf_size) < 0)
2660 return -1;
2661 }
2662 if (!s2->current_picture_ptr) {
2663 av_log(avctx, AV_LOG_ERROR,
2664 "current_picture not initialized\n");
2665 return AVERROR_INVALIDDATA;
2666 }
2667
2668 if (uses_vdpau(avctx)) {
2669 s->slice_count++;
2670 break;
2671 }
2672
2673 if (HAVE_THREADS &&
2674 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2675 !avctx->hwaccel) {
2676 int threshold = (s2->mb_height * s->slice_count +
2677 s2->slice_context_count / 2) /
2678 s2->slice_context_count;
2679 av_assert0(avctx->thread_count > 1);
2680 if (threshold <= mb_y) {
2681 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2682
2683 thread_context->start_mb_y = mb_y;
2684 thread_context->end_mb_y = s2->mb_height;
2685 if (s->slice_count) {
2686 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2687 ret = ff_update_duplicate_context(thread_context, s2);
2688 if (ret < 0)
2689 return ret;
2690 }
2691 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2692 s->slice_count++;
2693 }
2694 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2695 } else {
2696 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2697 emms_c();
2698
2699 if (ret < 0) {
2700 if (avctx->err_recognition & AV_EF_EXPLODE)
2701 return ret;
2702 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2703 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2704 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2705 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2706 } else {
2707 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2708 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2709 ER_AC_END | ER_DC_END | ER_MV_END);
2710 }
2711 }
2712 }
2713 break;
2714 }
2715 }
2716}
2717
2718static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2719 int *got_output, AVPacket *avpkt)
2720{
2721 const uint8_t *buf = avpkt->data;
2722 int ret;
2723 int buf_size = avpkt->size;
2724 Mpeg1Context *s = avctx->priv_data;
2725 AVFrame *picture = data;
2726 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2727
2728 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2729 /* special case for last picture */
2730 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2731 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2732 if (ret < 0)
2733 return ret;
2734
2735 s2->next_picture_ptr = NULL;
2736
2737 *got_output = 1;
2738 }
2739 return buf_size;
2740 }
2741
2742 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2743 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2744 buf_size, NULL);
2745
2746 if (ff_combine_frame(&s2->parse_context, next,
2747 (const uint8_t **) &buf, &buf_size) < 0)
2748 return buf_size;
2749 }
2750
2751 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2752 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2753 || s2->codec_tag == AV_RL32("BW10")
2754 ))
2755 vcr2_init_sequence(avctx);
2756
2757 s->slice_count = 0;
2758
2759 if (avctx->extradata && !s->extradata_decoded) {
2760 ret = decode_chunks(avctx, picture, got_output,
2761 avctx->extradata, avctx->extradata_size);
2762 if (*got_output) {
2763 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2764 *got_output = 0;
2765 }
2766 s->extradata_decoded = 1;
2767 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2768 s2->current_picture_ptr = NULL;
2769 return ret;
2770 }
2771 }
2772
2773 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2774 if (ret<0 || *got_output)
2775 s2->current_picture_ptr = NULL;
2776
2777 return ret;
2778}
2779
2780static void flush(AVCodecContext *avctx)
2781{
2782 Mpeg1Context *s = avctx->priv_data;
2783
2784 s->sync = 0;
2785
2786 ff_mpeg_flush(avctx);
2787}
2788
2789static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2790{
2791 Mpeg1Context *s = avctx->priv_data;
2792
2793 if (s->mpeg_enc_ctx_allocated)
2794 ff_mpv_common_end(&s->mpeg_enc_ctx);
2795 av_freep(&s->a53_caption);
2796 return 0;
2797}
2798
2799static const AVProfile mpeg2_video_profiles[] = {
2800 { FF_PROFILE_MPEG2_422, "4:2:2" },
2801 { FF_PROFILE_MPEG2_HIGH, "High" },
2802 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2803 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2804 { FF_PROFILE_MPEG2_MAIN, "Main" },
2805 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2806 { FF_PROFILE_RESERVED, "Reserved" },
2807 { FF_PROFILE_RESERVED, "Reserved" },
2808 { FF_PROFILE_UNKNOWN },
2809};
2810
2811AVCodec ff_mpeg1video_decoder = {
2812 .name = "mpeg1video",
2813 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2814 .type = AVMEDIA_TYPE_VIDEO,
2815 .id = AV_CODEC_ID_MPEG1VIDEO,
2816 .priv_data_size = sizeof(Mpeg1Context),
2817 .init = mpeg_decode_init,
2818 .close = mpeg_decode_end,
2819 .decode = mpeg_decode_frame,
2820 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2821 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2822 CODEC_CAP_SLICE_THREADS,
2823 .flush = flush,
2824 .max_lowres = 3,
2825 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2826};
2827
2828AVCodec ff_mpeg2video_decoder = {
2829 .name = "mpeg2video",
2830 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2831 .type = AVMEDIA_TYPE_VIDEO,
2832 .id = AV_CODEC_ID_MPEG2VIDEO,
2833 .priv_data_size = sizeof(Mpeg1Context),
2834 .init = mpeg_decode_init,
2835 .close = mpeg_decode_end,
2836 .decode = mpeg_decode_frame,
2837 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2838 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2839 CODEC_CAP_SLICE_THREADS,
2840 .flush = flush,
2841 .max_lowres = 3,
2842 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2843};
2844
2845//legacy decoder
2846AVCodec ff_mpegvideo_decoder = {
2847 .name = "mpegvideo",
2848 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2849 .type = AVMEDIA_TYPE_VIDEO,
2850 .id = AV_CODEC_ID_MPEG2VIDEO,
2851 .priv_data_size = sizeof(Mpeg1Context),
2852 .init = mpeg_decode_init,
2853 .close = mpeg_decode_end,
2854 .decode = mpeg_decode_frame,
2855 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2856 .flush = flush,
2857 .max_lowres = 3,
2858};
2859
2860#if FF_API_XVMC
2861#if CONFIG_MPEG_XVMC_DECODER
2862static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2863{
2864 if (avctx->active_thread_type & FF_THREAD_SLICE)
2865 return -1;
2866 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2867 return -1;
2868 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2869 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2870 }
2871 mpeg_decode_init(avctx);
2872
2873 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2874 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2875
2876 return 0;
2877}
2878
2879AVCodec ff_mpeg_xvmc_decoder = {
2880 .name = "mpegvideo_xvmc",
2881 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2882 .type = AVMEDIA_TYPE_VIDEO,
2883 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2884 .priv_data_size = sizeof(Mpeg1Context),
2885 .init = mpeg_mc_decode_init,
2886 .close = mpeg_decode_end,
2887 .decode = mpeg_decode_frame,
2888 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2889 CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2890 .flush = flush,
2891};
2892
2893#endif
2894#endif /* FF_API_XVMC */
2895
2896#if CONFIG_MPEG_VDPAU_DECODER
2897AVCodec ff_mpeg_vdpau_decoder = {
2898 .name = "mpegvideo_vdpau",
2899 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2900 .type = AVMEDIA_TYPE_VIDEO,
2901 .id = AV_CODEC_ID_MPEG2VIDEO,
2902 .priv_data_size = sizeof(Mpeg1Context),
2903 .init = mpeg_decode_init,
2904 .close = mpeg_decode_end,
2905 .decode = mpeg_decode_frame,
2906 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2907 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2908 .flush = flush,
2909};
2910#endif
2911
2912#if CONFIG_MPEG1_VDPAU_DECODER
2913AVCodec ff_mpeg1_vdpau_decoder = {
2914 .name = "mpeg1video_vdpau",
2915 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2916 .type = AVMEDIA_TYPE_VIDEO,
2917 .id = AV_CODEC_ID_MPEG1VIDEO,
2918 .priv_data_size = sizeof(Mpeg1Context),
2919 .init = mpeg_decode_init,
2920 .close = mpeg_decode_end,
2921 .decode = mpeg_decode_frame,
2922 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2923 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2924 .flush = flush,
2925};
2926#endif
ffmpeg Piment Noir Debian package repository