3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
28 #define UNCHECKED_BITSTREAM_READER 1
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
46 #include "mpegvideodata.h"
50 #include "vdpau_compat.h"
51 #include "xvmc_internal.h"
53 typedef struct Mpeg1Context {
54 MpegEncContext mpeg_enc_ctx;
55 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
56 int repeat_field; /* true if we must repeat the field */
57 AVPanScan pan_scan; /* some temporary storage for the panscan */
65 AVRational save_aspect;
66 int save_width, save_height, save_progressive_seq;
67 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
68 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
71 int extradata_decoded;
74 #define MB_TYPE_ZERO_MV 0x20000000
76 static const uint32_t ptype2mb_type[7] = {
78 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
80 MB_TYPE_L0 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_INTRA,
82 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
83 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
86 static const uint32_t btype2mb_type[11] = {
89 MB_TYPE_L1 | MB_TYPE_CBP,
91 MB_TYPE_L0 | MB_TYPE_CBP,
93 MB_TYPE_L0L1 | MB_TYPE_CBP,
94 MB_TYPE_QUANT | MB_TYPE_INTRA,
95 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
96 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
97 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
100 /* as H.263, but only 17 codes */
101 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
103 int code, sign, val, shift;
105 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
111 sign = get_bits1(&s->gb);
115 val = (val - 1) << shift;
116 val |= get_bits(&s->gb, shift);
123 /* modulo decoding */
124 return sign_extend(val, 5 + shift);
127 #define check_scantable_index(ctx, x) \
130 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
131 ctx->mb_x, ctx->mb_y); \
132 return AVERROR_INVALIDDATA; \
136 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
137 int16_t *block, int n)
139 int level, dc, diff, i, j, run;
141 RLTable *rl = &ff_rl_mpeg1;
142 uint8_t *const scantable = s->intra_scantable.permutated;
143 const uint16_t *quant_matrix = s->intra_matrix;
144 const int qscale = s->qscale;
147 component = (n <= 3 ? 0 : n - 4 + 1);
148 diff = decode_dc(&s->gb, component);
150 return AVERROR_INVALIDDATA;
151 dc = s->last_dc[component];
153 s->last_dc[component] = dc;
154 block[0] = dc * quant_matrix[0];
155 ff_tlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
158 OPEN_READER(re, &s->gb);
159 UPDATE_CACHE(re, &s->gb);
160 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
163 /* now quantify & encode AC coefficients */
165 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
170 check_scantable_index(s, i);
172 level = (level * qscale * quant_matrix[j]) >> 4;
173 level = (level - 1) | 1;
174 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
175 SHOW_SBITS(re, &s->gb, 1);
176 SKIP_BITS(re, &s->gb, 1);
179 run = SHOW_UBITS(re, &s->gb, 6) + 1;
180 LAST_SKIP_BITS(re, &s->gb, 6);
181 UPDATE_CACHE(re, &s->gb);
182 level = SHOW_SBITS(re, &s->gb, 8);
183 SKIP_BITS(re, &s->gb, 8);
185 level = SHOW_UBITS(re, &s->gb, 8) - 256;
186 SKIP_BITS(re, &s->gb, 8);
187 } else if (level == 0) {
188 level = SHOW_UBITS(re, &s->gb, 8);
189 SKIP_BITS(re, &s->gb, 8);
192 check_scantable_index(s, i);
196 level = (level * qscale * quant_matrix[j]) >> 4;
197 level = (level - 1) | 1;
200 level = (level * qscale * quant_matrix[j]) >> 4;
201 level = (level - 1) | 1;
206 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
209 UPDATE_CACHE(re, &s->gb);
212 LAST_SKIP_BITS(re, &s->gb, 2);
213 CLOSE_READER(re, &s->gb);
215 s->block_last_index[n] = i;
219 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
221 return mpeg1_decode_block_intra(s, block, n);
224 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
225 int16_t *block, int n)
227 int level, i, j, run;
228 RLTable *rl = &ff_rl_mpeg1;
229 uint8_t *const scantable = s->intra_scantable.permutated;
230 const uint16_t *quant_matrix = s->inter_matrix;
231 const int qscale = s->qscale;
234 OPEN_READER(re, &s->gb);
236 // special case for first coefficient, no need to add second VLC table
237 UPDATE_CACHE(re, &s->gb);
238 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
239 level = (3 * qscale * quant_matrix[0]) >> 5;
240 level = (level - 1) | 1;
241 if (GET_CACHE(re, &s->gb) & 0x40000000)
245 SKIP_BITS(re, &s->gb, 2);
246 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
249 /* now quantify & encode AC coefficients */
251 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
256 check_scantable_index(s, i);
258 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
259 level = (level - 1) | 1;
260 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
261 SHOW_SBITS(re, &s->gb, 1);
262 SKIP_BITS(re, &s->gb, 1);
265 run = SHOW_UBITS(re, &s->gb, 6) + 1;
266 LAST_SKIP_BITS(re, &s->gb, 6);
267 UPDATE_CACHE(re, &s->gb);
268 level = SHOW_SBITS(re, &s->gb, 8);
269 SKIP_BITS(re, &s->gb, 8);
271 level = SHOW_UBITS(re, &s->gb, 8) - 256;
272 SKIP_BITS(re, &s->gb, 8);
273 } else if (level == 0) {
274 level = SHOW_UBITS(re, &s->gb, 8);
275 SKIP_BITS(re, &s->gb, 8);
278 check_scantable_index(s, i);
282 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
283 level = (level - 1) | 1;
286 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
287 level = (level - 1) | 1;
292 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
294 UPDATE_CACHE(re, &s->gb);
297 LAST_SKIP_BITS(re, &s->gb, 2);
298 CLOSE_READER(re, &s->gb);
300 s->block_last_index[n] = i;
305 * Note: this function can read out of range and crash for corrupt streams.
306 * Changing this would eat up any speed benefits it has.
307 * Do not use "fast" flag if you need the code to be robust.
309 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
310 int16_t *block, int n)
312 int level, i, j, run;
313 RLTable *rl = &ff_rl_mpeg1;
314 uint8_t *const scantable = s->intra_scantable.permutated;
315 const int qscale = s->qscale;
318 OPEN_READER(re, &s->gb);
320 // Special case for first coefficient, no need to add second VLC table.
321 UPDATE_CACHE(re, &s->gb);
322 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
323 level = (3 * qscale) >> 1;
324 level = (level - 1) | 1;
325 if (GET_CACHE(re, &s->gb) & 0x40000000)
329 SKIP_BITS(re, &s->gb, 2);
330 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
334 /* now quantify & encode AC coefficients */
336 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
341 check_scantable_index(s, i);
343 level = ((level * 2 + 1) * qscale) >> 1;
344 level = (level - 1) | 1;
345 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
346 SHOW_SBITS(re, &s->gb, 1);
347 SKIP_BITS(re, &s->gb, 1);
350 run = SHOW_UBITS(re, &s->gb, 6) + 1;
351 LAST_SKIP_BITS(re, &s->gb, 6);
352 UPDATE_CACHE(re, &s->gb);
353 level = SHOW_SBITS(re, &s->gb, 8);
354 SKIP_BITS(re, &s->gb, 8);
356 level = SHOW_UBITS(re, &s->gb, 8) - 256;
357 SKIP_BITS(re, &s->gb, 8);
358 } else if (level == 0) {
359 level = SHOW_UBITS(re, &s->gb, 8);
360 SKIP_BITS(re, &s->gb, 8);
363 check_scantable_index(s, i);
367 level = ((level * 2 + 1) * qscale) >> 1;
368 level = (level - 1) | 1;
371 level = ((level * 2 + 1) * qscale) >> 1;
372 level = (level - 1) | 1;
377 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
379 UPDATE_CACHE(re, &s->gb);
382 LAST_SKIP_BITS(re, &s->gb, 2);
383 CLOSE_READER(re, &s->gb);
385 s->block_last_index[n] = i;
389 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
390 int16_t *block, int n)
392 int level, i, j, run;
393 RLTable *rl = &ff_rl_mpeg1;
394 uint8_t *const scantable = s->intra_scantable.permutated;
395 const uint16_t *quant_matrix;
396 const int qscale = s->qscale;
402 OPEN_READER(re, &s->gb);
405 quant_matrix = s->inter_matrix;
407 quant_matrix = s->chroma_inter_matrix;
409 // Special case for first coefficient, no need to add second VLC table.
410 UPDATE_CACHE(re, &s->gb);
411 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
412 level = (3 * qscale * quant_matrix[0]) >> 5;
413 if (GET_CACHE(re, &s->gb) & 0x40000000)
418 SKIP_BITS(re, &s->gb, 2);
419 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
423 /* now quantify & encode AC coefficients */
425 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
430 check_scantable_index(s, i);
432 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
433 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
434 SHOW_SBITS(re, &s->gb, 1);
435 SKIP_BITS(re, &s->gb, 1);
438 run = SHOW_UBITS(re, &s->gb, 6) + 1;
439 LAST_SKIP_BITS(re, &s->gb, 6);
440 UPDATE_CACHE(re, &s->gb);
441 level = SHOW_SBITS(re, &s->gb, 12);
442 SKIP_BITS(re, &s->gb, 12);
445 check_scantable_index(s, i);
448 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
451 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
457 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
459 UPDATE_CACHE(re, &s->gb);
462 LAST_SKIP_BITS(re, &s->gb, 2);
463 CLOSE_READER(re, &s->gb);
465 block[63] ^= (mismatch & 1);
467 s->block_last_index[n] = i;
472 * Note: this function can read out of range and crash for corrupt streams.
473 * Changing this would eat up any speed benefits it has.
474 * Do not use "fast" flag if you need the code to be robust.
476 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
477 int16_t *block, int n)
479 int level, i, j, run;
480 RLTable *rl = &ff_rl_mpeg1;
481 uint8_t *const scantable = s->intra_scantable.permutated;
482 const int qscale = s->qscale;
483 OPEN_READER(re, &s->gb);
486 // special case for first coefficient, no need to add second VLC table
487 UPDATE_CACHE(re, &s->gb);
488 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
489 level = (3 * qscale) >> 1;
490 if (GET_CACHE(re, &s->gb) & 0x40000000)
494 SKIP_BITS(re, &s->gb, 2);
495 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
499 /* now quantify & encode AC coefficients */
501 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
506 level = ((level * 2 + 1) * qscale) >> 1;
507 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
508 SHOW_SBITS(re, &s->gb, 1);
509 SKIP_BITS(re, &s->gb, 1);
512 run = SHOW_UBITS(re, &s->gb, 6) + 1;
513 LAST_SKIP_BITS(re, &s->gb, 6);
514 UPDATE_CACHE(re, &s->gb);
515 level = SHOW_SBITS(re, &s->gb, 12);
516 SKIP_BITS(re, &s->gb, 12);
521 level = ((-level * 2 + 1) * qscale) >> 1;
524 level = ((level * 2 + 1) * qscale) >> 1;
529 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
532 UPDATE_CACHE(re, &s->gb);
535 LAST_SKIP_BITS(re, &s->gb, 2);
536 CLOSE_READER(re, &s->gb);
537 s->block_last_index[n] = i;
541 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
542 int16_t *block, int n)
544 int level, dc, diff, i, j, run;
547 uint8_t *const scantable = s->intra_scantable.permutated;
548 const uint16_t *quant_matrix;
549 const int qscale = s->qscale;
554 quant_matrix = s->intra_matrix;
557 quant_matrix = s->chroma_intra_matrix;
558 component = (n & 1) + 1;
560 diff = decode_dc(&s->gb, component);
562 return AVERROR_INVALIDDATA;
563 dc = s->last_dc[component];
565 s->last_dc[component] = dc;
566 block[0] = dc << (3 - s->intra_dc_precision);
567 ff_tlog(s->avctx, "dc=%d\n", block[0]);
568 mismatch = block[0] ^ 1;
570 if (s->intra_vlc_format)
576 OPEN_READER(re, &s->gb);
577 /* now quantify & encode AC coefficients */
579 UPDATE_CACHE(re, &s->gb);
580 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
585 } else if (level != 0) {
587 check_scantable_index(s, i);
589 level = (level * qscale * quant_matrix[j]) >> 4;
590 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
591 SHOW_SBITS(re, &s->gb, 1);
592 LAST_SKIP_BITS(re, &s->gb, 1);
595 run = SHOW_UBITS(re, &s->gb, 6) + 1;
596 LAST_SKIP_BITS(re, &s->gb, 6);
597 UPDATE_CACHE(re, &s->gb);
598 level = SHOW_SBITS(re, &s->gb, 12);
599 SKIP_BITS(re, &s->gb, 12);
601 check_scantable_index(s, i);
604 level = (-level * qscale * quant_matrix[j]) >> 4;
607 level = (level * qscale * quant_matrix[j]) >> 4;
614 CLOSE_READER(re, &s->gb);
616 block[63] ^= mismatch & 1;
618 s->block_last_index[n] = i;
623 * Note: this function can read out of range and crash for corrupt streams.
624 * Changing this would eat up any speed benefits it has.
625 * Do not use "fast" flag if you need the code to be robust.
627 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
628 int16_t *block, int n)
630 int level, dc, diff, i, j, run;
633 uint8_t *const scantable = s->intra_scantable.permutated;
634 const uint16_t *quant_matrix;
635 const int qscale = s->qscale;
639 quant_matrix = s->intra_matrix;
642 quant_matrix = s->chroma_intra_matrix;
643 component = (n & 1) + 1;
645 diff = decode_dc(&s->gb, component);
647 return AVERROR_INVALIDDATA;
648 dc = s->last_dc[component];
650 s->last_dc[component] = dc;
651 block[0] = dc << (3 - s->intra_dc_precision);
653 if (s->intra_vlc_format)
659 OPEN_READER(re, &s->gb);
660 /* now quantify & encode AC coefficients */
662 UPDATE_CACHE(re, &s->gb);
663 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
666 if (level >= 64 || i > 63) {
668 } else if (level != 0) {
671 level = (level * qscale * quant_matrix[j]) >> 4;
672 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
673 SHOW_SBITS(re, &s->gb, 1);
674 LAST_SKIP_BITS(re, &s->gb, 1);
677 run = SHOW_UBITS(re, &s->gb, 6) + 1;
678 LAST_SKIP_BITS(re, &s->gb, 6);
679 UPDATE_CACHE(re, &s->gb);
680 level = SHOW_SBITS(re, &s->gb, 12);
681 SKIP_BITS(re, &s->gb, 12);
685 level = (-level * qscale * quant_matrix[j]) >> 4;
688 level = (level * qscale * quant_matrix[j]) >> 4;
694 CLOSE_READER(re, &s->gb);
697 s->block_last_index[n] = i;
701 /******************************************/
704 static inline int get_dmv(MpegEncContext *s)
706 if (get_bits1(&s->gb))
707 return 1 - (get_bits1(&s->gb) << 1);
712 static inline int get_qscale(MpegEncContext *s)
714 int qscale = get_bits(&s->gb, 5);
716 return ff_mpeg2_non_linear_qscale[qscale];
722 /* motion type (for MPEG-2) */
728 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
730 int i, j, k, cbp, val, mb_type, motion_type;
731 const int mb_block_count = 4 + (1 << s->chroma_format);
734 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
736 av_assert2(s->mb_skipped == 0);
738 if (s->mb_skip_run-- != 0) {
739 if (s->pict_type == AV_PICTURE_TYPE_P) {
741 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
742 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
747 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
749 // FIXME not sure if this is allowed in MPEG at all
750 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
751 if (IS_INTRA(mb_type)) {
752 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
753 return AVERROR_INVALIDDATA;
755 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
756 mb_type | MB_TYPE_SKIP;
758 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
765 switch (s->pict_type) {
767 case AV_PICTURE_TYPE_I:
768 if (get_bits1(&s->gb) == 0) {
769 if (get_bits1(&s->gb) == 0) {
770 av_log(s->avctx, AV_LOG_ERROR,
771 "invalid mb type in I Frame at %d %d\n",
773 return AVERROR_INVALIDDATA;
775 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
777 mb_type = MB_TYPE_INTRA;
780 case AV_PICTURE_TYPE_P:
781 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
783 av_log(s->avctx, AV_LOG_ERROR,
784 "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
785 return AVERROR_INVALIDDATA;
787 mb_type = ptype2mb_type[mb_type];
789 case AV_PICTURE_TYPE_B:
790 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
792 av_log(s->avctx, AV_LOG_ERROR,
793 "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
794 return AVERROR_INVALIDDATA;
796 mb_type = btype2mb_type[mb_type];
799 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
800 // motion_type = 0; /* avoid warning */
801 if (IS_INTRA(mb_type)) {
802 s->bdsp.clear_blocks(s->block[0]);
804 if (!s->chroma_y_shift)
805 s->bdsp.clear_blocks(s->block[6]);
807 /* compute DCT type */
808 // FIXME: add an interlaced_dct coded var?
809 if (s->picture_structure == PICT_FRAME &&
810 !s->frame_pred_frame_dct)
811 s->interlaced_dct = get_bits1(&s->gb);
813 if (IS_QUANT(mb_type))
814 s->qscale = get_qscale(s);
816 if (s->concealment_motion_vectors) {
817 /* just parse them */
818 if (s->picture_structure != PICT_FRAME)
819 skip_bits1(&s->gb); /* field select */
822 s->last_mv[0][0][0] =
823 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
824 s->last_mv[0][0][0]);
826 s->last_mv[0][0][1] =
827 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
828 s->last_mv[0][0][1]);
830 check_marker(&s->gb, "after concealment_motion_vectors");
832 /* reset mv prediction */
833 memset(s->last_mv, 0, sizeof(s->last_mv));
836 // if 1, we memcpy blocks in xvmcvideo
837 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
838 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
840 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
841 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
842 for (i = 0; i < 6; i++)
843 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
845 for (i = 0; i < mb_block_count; i++)
846 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
850 for (i = 0; i < 6; i++)
851 if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0)
855 if (mb_type & MB_TYPE_ZERO_MV) {
856 av_assert2(mb_type & MB_TYPE_CBP);
858 s->mv_dir = MV_DIR_FORWARD;
859 if (s->picture_structure == PICT_FRAME) {
860 if (s->picture_structure == PICT_FRAME
861 && !s->frame_pred_frame_dct)
862 s->interlaced_dct = get_bits1(&s->gb);
863 s->mv_type = MV_TYPE_16X16;
865 s->mv_type = MV_TYPE_FIELD;
866 mb_type |= MB_TYPE_INTERLACED;
867 s->field_select[0][0] = s->picture_structure - 1;
870 if (IS_QUANT(mb_type))
871 s->qscale = get_qscale(s);
873 s->last_mv[0][0][0] = 0;
874 s->last_mv[0][0][1] = 0;
875 s->last_mv[0][1][0] = 0;
876 s->last_mv[0][1][1] = 0;
880 av_assert2(mb_type & MB_TYPE_L0L1);
881 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
882 /* get additional motion vector type */
883 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
884 motion_type = MT_FRAME;
886 motion_type = get_bits(&s->gb, 2);
887 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
888 s->interlaced_dct = get_bits1(&s->gb);
891 if (IS_QUANT(mb_type))
892 s->qscale = get_qscale(s);
895 s->mv_dir = (mb_type >> 13) & 3;
896 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
897 switch (motion_type) {
898 case MT_FRAME: /* or MT_16X8 */
899 if (s->picture_structure == PICT_FRAME) {
900 mb_type |= MB_TYPE_16x16;
901 s->mv_type = MV_TYPE_16X16;
902 for (i = 0; i < 2; i++) {
903 if (USES_LIST(mb_type, i)) {
906 s->last_mv[i][0][0] =
907 s->last_mv[i][1][0] =
908 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
909 s->last_mv[i][0][0]);
911 s->last_mv[i][0][1] =
912 s->last_mv[i][1][1] =
913 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
914 s->last_mv[i][0][1]);
915 /* full_pel: only for MPEG-1 */
916 if (s->full_pel[i]) {
917 s->mv[i][0][0] <<= 1;
918 s->mv[i][0][1] <<= 1;
923 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
924 s->mv_type = MV_TYPE_16X8;
925 for (i = 0; i < 2; i++) {
926 if (USES_LIST(mb_type, i)) {
928 for (j = 0; j < 2; j++) {
929 s->field_select[i][j] = get_bits1(&s->gb);
930 for (k = 0; k < 2; k++) {
931 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
932 s->last_mv[i][j][k]);
933 s->last_mv[i][j][k] = val;
934 s->mv[i][j][k] = val;
942 s->mv_type = MV_TYPE_FIELD;
943 if (s->picture_structure == PICT_FRAME) {
944 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
945 for (i = 0; i < 2; i++) {
946 if (USES_LIST(mb_type, i)) {
947 for (j = 0; j < 2; j++) {
948 s->field_select[i][j] = get_bits1(&s->gb);
949 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
950 s->last_mv[i][j][0]);
951 s->last_mv[i][j][0] = val;
952 s->mv[i][j][0] = val;
953 ff_tlog(s->avctx, "fmx=%d\n", val);
954 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
955 s->last_mv[i][j][1] >> 1);
956 s->last_mv[i][j][1] = 2 * val;
957 s->mv[i][j][1] = val;
958 ff_tlog(s->avctx, "fmy=%d\n", val);
963 av_assert0(!s->progressive_sequence);
964 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
965 for (i = 0; i < 2; i++) {
966 if (USES_LIST(mb_type, i)) {
967 s->field_select[i][0] = get_bits1(&s->gb);
968 for (k = 0; k < 2; k++) {
969 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
970 s->last_mv[i][0][k]);
971 s->last_mv[i][0][k] = val;
972 s->last_mv[i][1][k] = val;
973 s->mv[i][0][k] = val;
980 if (s->progressive_sequence){
981 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
982 return AVERROR_INVALIDDATA;
984 s->mv_type = MV_TYPE_DMV;
985 for (i = 0; i < 2; i++) {
986 if (USES_LIST(mb_type, i)) {
987 int dmx, dmy, mx, my, m;
988 const int my_shift = s->picture_structure == PICT_FRAME;
990 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
991 s->last_mv[i][0][0]);
992 s->last_mv[i][0][0] = mx;
993 s->last_mv[i][1][0] = mx;
995 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
996 s->last_mv[i][0][1] >> my_shift);
1000 s->last_mv[i][0][1] = my << my_shift;
1001 s->last_mv[i][1][1] = my << my_shift;
1003 s->mv[i][0][0] = mx;
1004 s->mv[i][0][1] = my;
1005 s->mv[i][1][0] = mx; // not used
1006 s->mv[i][1][1] = my; // not used
1008 if (s->picture_structure == PICT_FRAME) {
1009 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1011 // m = 1 + 2 * s->top_field_first;
1012 m = s->top_field_first ? 1 : 3;
1014 /* top -> top pred */
1015 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1016 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1018 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1019 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1021 mb_type |= MB_TYPE_16x16;
1023 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1024 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1025 if (s->picture_structure == PICT_TOP_FIELD)
1034 av_log(s->avctx, AV_LOG_ERROR,
1035 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1036 return AVERROR_INVALIDDATA;
1041 if (HAS_CBP(mb_type)) {
1042 s->bdsp.clear_blocks(s->block[0]);
1044 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1045 if (mb_block_count > 6) {
1046 cbp <<= mb_block_count - 6;
1047 cbp |= get_bits(&s->gb, mb_block_count - 6);
1048 s->bdsp.clear_blocks(s->block[6]);
1051 av_log(s->avctx, AV_LOG_ERROR,
1052 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1053 return AVERROR_INVALIDDATA;
1056 // if 1, we memcpy blocks in xvmcvideo
1057 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1058 ff_xvmc_pack_pblocks(s, cbp);
1060 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1061 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1062 for (i = 0; i < 6; i++) {
1064 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1066 s->block_last_index[i] = -1;
1070 cbp <<= 12 - mb_block_count;
1072 for (i = 0; i < mb_block_count; i++) {
1073 if (cbp & (1 << 11)) {
1074 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1077 s->block_last_index[i] = -1;
1083 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1084 for (i = 0; i < 6; i++) {
1086 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1088 s->block_last_index[i] = -1;
1092 for (i = 0; i < 6; i++) {
1094 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1097 s->block_last_index[i] = -1;
1104 for (i = 0; i < 12; i++)
1105 s->block_last_index[i] = -1;
1109 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1114 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1116 Mpeg1Context *s = avctx->priv_data;
1117 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1119 ff_mpv_decode_defaults(s2);
1121 if ( avctx->codec_tag != AV_RL32("VCR2")
1122 && avctx->codec_tag != AV_RL32("BW10"))
1123 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1124 ff_mpv_decode_init(s2, avctx);
1126 s->mpeg_enc_ctx.avctx = avctx;
1128 /* we need some permutation to store matrices,
1129 * until the decoder sets the real permutation. */
1130 ff_mpv_idct_init(s2);
1131 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1132 ff_mpeg12_init_vlcs();
1134 s2->chroma_format = 1;
1135 s->mpeg_enc_ctx_allocated = 0;
1136 s->mpeg_enc_ctx.picture_number = 0;
1137 s->repeat_field = 0;
1138 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1139 avctx->color_range = AVCOL_RANGE_MPEG;
1144 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1145 const AVCodecContext *avctx_from)
1147 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1148 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1151 if (avctx == avctx_from ||
1152 !ctx_from->mpeg_enc_ctx_allocated ||
1153 !s1->context_initialized)
1156 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1160 if (!ctx->mpeg_enc_ctx_allocated)
1161 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1163 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1164 s->picture_number++;
1170 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1171 const uint8_t *new_perm)
1173 uint16_t temp_matrix[64];
1176 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1178 for (i = 0; i < 64; i++)
1179 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1182 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1183 #if CONFIG_MPEG1_XVMC_HWACCEL
1186 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
1187 AV_PIX_FMT_VDPAU_MPEG1,
1189 #if CONFIG_MPEG1_VDPAU_HWACCEL
1196 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1197 #if CONFIG_MPEG2_XVMC_HWACCEL
1200 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
1201 AV_PIX_FMT_VDPAU_MPEG2,
1203 #if CONFIG_MPEG2_VDPAU_HWACCEL
1206 #if CONFIG_MPEG2_DXVA2_HWACCEL
1207 AV_PIX_FMT_DXVA2_VLD,
1209 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1210 AV_PIX_FMT_D3D11VA_VLD,
1212 #if CONFIG_MPEG2_VAAPI_HWACCEL
1215 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1216 AV_PIX_FMT_VIDEOTOOLBOX,
1222 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1227 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1233 static inline int uses_vdpau(AVCodecContext *avctx) {
1234 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1238 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1240 Mpeg1Context *s1 = avctx->priv_data;
1241 MpegEncContext *s = &s1->mpeg_enc_ctx;
1242 const enum AVPixelFormat *pix_fmts;
1244 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1245 return AV_PIX_FMT_GRAY8;
1247 if (s->chroma_format < 2)
1248 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1249 mpeg1_hwaccel_pixfmt_list_420 :
1250 mpeg2_hwaccel_pixfmt_list_420;
1251 else if (s->chroma_format == 2)
1252 pix_fmts = mpeg12_pixfmt_list_422;
1254 pix_fmts = mpeg12_pixfmt_list_444;
1256 return ff_thread_get_format(avctx, pix_fmts);
1259 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1261 // until then pix_fmt may be changed right after codec init
1264 || uses_vdpau(avctx)
1267 if (avctx->idct_algo == FF_IDCT_AUTO)
1268 avctx->idct_algo = FF_IDCT_SIMPLE;
1270 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1271 Mpeg1Context *s1 = avctx->priv_data;
1272 MpegEncContext *s = &s1->mpeg_enc_ctx;
1274 s->pack_pblocks = 1;
1276 FF_DISABLE_DEPRECATION_WARNINGS
1277 avctx->xvmc_acceleration = 2;
1278 FF_ENABLE_DEPRECATION_WARNINGS
1279 #endif /* FF_API_XVMC */
1283 /* Call this function when we know all parameters.
1284 * It may be called in different places for MPEG-1 and MPEG-2. */
1285 static int mpeg_decode_postinit(AVCodecContext *avctx)
1287 Mpeg1Context *s1 = avctx->priv_data;
1288 MpegEncContext *s = &s1->mpeg_enc_ctx;
1289 uint8_t old_permutation[64];
1292 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1294 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1297 if (s->aspect_ratio_info > 1) {
1299 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1300 (AVRational) { s1->pan_scan.width,
1301 s1->pan_scan.height }),
1302 (AVRational) { s->width, s->height });
1304 /* We ignore the spec here and guess a bit as reality does not
1305 * match the spec, see for example res_change_ffmpeg_aspect.ts
1306 * and sequence-display-aspect.mpg.
1307 * issue1613, 621, 562 */
1308 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1309 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1310 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1311 s->avctx->sample_aspect_ratio =
1312 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1313 (AVRational) { s->width, s->height });
1315 s->avctx->sample_aspect_ratio =
1316 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1317 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1318 // issue1613 4/3 16/9 -> 16/9
1319 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1320 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1321 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1322 ff_dlog(avctx, "aspect A %d/%d\n",
1323 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1324 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1325 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1326 s->avctx->sample_aspect_ratio.den);
1329 s->avctx->sample_aspect_ratio =
1330 ff_mpeg2_aspect[s->aspect_ratio_info];
1334 if (av_image_check_sar(s->width, s->height,
1335 avctx->sample_aspect_ratio) < 0) {
1336 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1337 avctx->sample_aspect_ratio.num,
1338 avctx->sample_aspect_ratio.den);
1339 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1342 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1343 avctx->coded_width != s->width ||
1344 avctx->coded_height != s->height ||
1345 s1->save_width != s->width ||
1346 s1->save_height != s->height ||
1347 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1348 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1350 if (s1->mpeg_enc_ctx_allocated) {
1351 ParseContext pc = s->parse_context;
1352 s->parse_context.buffer = 0;
1353 ff_mpv_common_end(s);
1354 s->parse_context = pc;
1355 s1->mpeg_enc_ctx_allocated = 0;
1358 ret = ff_set_dimensions(avctx, s->width, s->height);
1362 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1363 avctx->rc_max_rate = s->bit_rate;
1364 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1365 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1366 avctx->bit_rate = s->bit_rate;
1368 s1->save_aspect = s->avctx->sample_aspect_ratio;
1369 s1->save_width = s->width;
1370 s1->save_height = s->height;
1371 s1->save_progressive_seq = s->progressive_sequence;
1373 /* low_delay may be forced, in this case we will have B-frames
1374 * that behave like P-frames. */
1375 avctx->has_b_frames = !s->low_delay;
1377 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1379 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1380 avctx->ticks_per_frame = 1;
1382 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1385 av_reduce(&s->avctx->framerate.num,
1386 &s->avctx->framerate.den,
1387 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1388 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1390 avctx->ticks_per_frame = 2;
1392 switch (s->chroma_format) {
1393 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1395 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1396 default: av_assert0(0);
1400 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1401 setup_hwaccel_for_pixfmt(avctx);
1403 /* Quantization matrices may need reordering
1404 * if DCT permutation is changed. */
1405 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1407 ff_mpv_idct_init(s);
1408 if ((ret = ff_mpv_common_init(s)) < 0)
1411 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1412 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1413 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1414 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1416 s1->mpeg_enc_ctx_allocated = 1;
1421 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1424 Mpeg1Context *s1 = avctx->priv_data;
1425 MpegEncContext *s = &s1->mpeg_enc_ctx;
1426 int ref, f_code, vbv_delay;
1428 init_get_bits(&s->gb, buf, buf_size * 8);
1430 ref = get_bits(&s->gb, 10); /* temporal ref */
1431 s->pict_type = get_bits(&s->gb, 3);
1432 if (s->pict_type == 0 || s->pict_type > 3)
1433 return AVERROR_INVALIDDATA;
1435 vbv_delay = get_bits(&s->gb, 16);
1436 s->vbv_delay = vbv_delay;
1437 if (s->pict_type == AV_PICTURE_TYPE_P ||
1438 s->pict_type == AV_PICTURE_TYPE_B) {
1439 s->full_pel[0] = get_bits1(&s->gb);
1440 f_code = get_bits(&s->gb, 3);
1441 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1442 return AVERROR_INVALIDDATA;
1444 s->mpeg_f_code[0][0] = f_code;
1445 s->mpeg_f_code[0][1] = f_code;
1447 if (s->pict_type == AV_PICTURE_TYPE_B) {
1448 s->full_pel[1] = get_bits1(&s->gb);
1449 f_code = get_bits(&s->gb, 3);
1450 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1451 return AVERROR_INVALIDDATA;
1453 s->mpeg_f_code[1][0] = f_code;
1454 s->mpeg_f_code[1][1] = f_code;
1456 s->current_picture.f->pict_type = s->pict_type;
1457 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1459 if (avctx->debug & FF_DEBUG_PICT_INFO)
1460 av_log(avctx, AV_LOG_DEBUG,
1461 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1468 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1470 MpegEncContext *s = &s1->mpeg_enc_ctx;
1471 int horiz_size_ext, vert_size_ext;
1474 skip_bits(&s->gb, 1); /* profile and level esc*/
1475 s->avctx->profile = get_bits(&s->gb, 3);
1476 s->avctx->level = get_bits(&s->gb, 4);
1477 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1478 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1480 if (!s->chroma_format) {
1481 s->chroma_format = 1;
1482 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1485 horiz_size_ext = get_bits(&s->gb, 2);
1486 vert_size_ext = get_bits(&s->gb, 2);
1487 s->width |= (horiz_size_ext << 12);
1488 s->height |= (vert_size_ext << 12);
1489 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1490 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1491 check_marker(&s->gb, "after bit rate extension");
1492 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1494 s->low_delay = get_bits1(&s->gb);
1495 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1498 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1499 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1501 ff_dlog(s->avctx, "sequence extension\n");
1502 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1504 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1505 av_log(s->avctx, AV_LOG_DEBUG,
1506 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1507 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1508 s->avctx->rc_buffer_size, s->bit_rate);
1511 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1513 MpegEncContext *s = &s1->mpeg_enc_ctx;
1514 int color_description, w, h;
1516 skip_bits(&s->gb, 3); /* video format */
1517 color_description = get_bits1(&s->gb);
1518 if (color_description) {
1519 s->avctx->color_primaries = get_bits(&s->gb, 8);
1520 s->avctx->color_trc = get_bits(&s->gb, 8);
1521 s->avctx->colorspace = get_bits(&s->gb, 8);
1523 w = get_bits(&s->gb, 14);
1524 skip_bits(&s->gb, 1); // marker
1525 h = get_bits(&s->gb, 14);
1526 // remaining 3 bits are zero padding
1528 s1->pan_scan.width = 16 * w;
1529 s1->pan_scan.height = 16 * h;
1531 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1532 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1535 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1537 MpegEncContext *s = &s1->mpeg_enc_ctx;
1541 if (s->progressive_sequence) {
1542 if (s->repeat_first_field) {
1544 if (s->top_field_first)
1548 if (s->picture_structure == PICT_FRAME) {
1550 if (s->repeat_first_field)
1554 for (i = 0; i < nofco; i++) {
1555 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1556 skip_bits(&s->gb, 1); // marker
1557 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1558 skip_bits(&s->gb, 1); // marker
1561 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1562 av_log(s->avctx, AV_LOG_DEBUG,
1563 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1564 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1565 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1566 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1569 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1570 uint16_t matrix1[64], int intra)
1574 for (i = 0; i < 64; i++) {
1575 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1576 int v = get_bits(&s->gb, 8);
1578 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1579 return AVERROR_INVALIDDATA;
1581 if (intra && i == 0 && v != 8) {
1582 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1583 v = 8; // needed by pink.mpg / issue1046
1592 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1594 ff_dlog(s->avctx, "matrix extension\n");
1596 if (get_bits1(&s->gb))
1597 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1598 if (get_bits1(&s->gb))
1599 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1600 if (get_bits1(&s->gb))
1601 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1602 if (get_bits1(&s->gb))
1603 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1606 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1608 MpegEncContext *s = &s1->mpeg_enc_ctx;
1610 s->full_pel[0] = s->full_pel[1] = 0;
1611 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1612 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1613 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1614 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1615 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1616 av_log(s->avctx, AV_LOG_ERROR,
1617 "Missing picture start code, guessing missing values\n");
1618 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1619 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1620 s->pict_type = AV_PICTURE_TYPE_I;
1622 s->pict_type = AV_PICTURE_TYPE_P;
1624 s->pict_type = AV_PICTURE_TYPE_B;
1625 s->current_picture.f->pict_type = s->pict_type;
1626 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1628 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1629 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1630 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1631 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1633 s->intra_dc_precision = get_bits(&s->gb, 2);
1634 s->picture_structure = get_bits(&s->gb, 2);
1635 s->top_field_first = get_bits1(&s->gb);
1636 s->frame_pred_frame_dct = get_bits1(&s->gb);
1637 s->concealment_motion_vectors = get_bits1(&s->gb);
1638 s->q_scale_type = get_bits1(&s->gb);
1639 s->intra_vlc_format = get_bits1(&s->gb);
1640 s->alternate_scan = get_bits1(&s->gb);
1641 s->repeat_first_field = get_bits1(&s->gb);
1642 s->chroma_420_type = get_bits1(&s->gb);
1643 s->progressive_frame = get_bits1(&s->gb);
1645 if (s->alternate_scan) {
1646 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1647 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1649 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1650 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1653 /* composite display not parsed */
1654 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1655 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1656 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1657 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1658 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1659 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1660 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1661 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1662 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1665 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1667 AVCodecContext *avctx = s->avctx;
1668 Mpeg1Context *s1 = (Mpeg1Context *) s;
1671 /* start frame decoding */
1672 if (s->first_field || s->picture_structure == PICT_FRAME) {
1673 AVFrameSideData *pan_scan;
1675 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1678 ff_mpeg_er_frame_start(s);
1680 /* first check if we must repeat the frame */
1681 s->current_picture_ptr->f->repeat_pict = 0;
1682 if (s->repeat_first_field) {
1683 if (s->progressive_sequence) {
1684 if (s->top_field_first)
1685 s->current_picture_ptr->f->repeat_pict = 4;
1687 s->current_picture_ptr->f->repeat_pict = 2;
1688 } else if (s->progressive_frame) {
1689 s->current_picture_ptr->f->repeat_pict = 1;
1693 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1694 AV_FRAME_DATA_PANSCAN,
1695 sizeof(s1->pan_scan));
1697 return AVERROR(ENOMEM);
1698 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1700 if (s1->a53_caption) {
1701 AVFrameSideData *sd = av_frame_new_side_data(
1702 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1703 s1->a53_caption_size);
1705 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1706 av_freep(&s1->a53_caption);
1707 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
1710 if (s1->has_stereo3d) {
1711 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1713 return AVERROR(ENOMEM);
1715 *stereo = s1->stereo3d;
1716 s1->has_stereo3d = 0;
1720 AVFrameSideData *sd =
1721 av_frame_new_side_data(s->current_picture_ptr->f,
1722 AV_FRAME_DATA_AFD, 1);
1724 return AVERROR(ENOMEM);
1726 *sd->data = s1->afd;
1730 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1731 ff_thread_finish_setup(avctx);
1732 } else { // second field
1735 if (!s->current_picture_ptr) {
1736 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1737 return AVERROR_INVALIDDATA;
1740 if (s->avctx->hwaccel &&
1741 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1742 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1743 av_log(avctx, AV_LOG_ERROR,
1744 "hardware accelerator failed to decode first field\n");
1749 for (i = 0; i < 4; i++) {
1750 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1751 if (s->picture_structure == PICT_BOTTOM_FIELD)
1752 s->current_picture.f->data[i] +=
1753 s->current_picture_ptr->f->linesize[i];
1757 if (avctx->hwaccel) {
1758 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1765 #define DECODE_SLICE_ERROR -1
1766 #define DECODE_SLICE_OK 0
1770 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1771 * @return DECODE_SLICE_ERROR if the slice is damaged,
1772 * DECODE_SLICE_OK if this slice is OK
1774 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1775 const uint8_t **buf, int buf_size)
1777 AVCodecContext *avctx = s->avctx;
1778 const int lowres = s->avctx->lowres;
1779 const int field_pic = s->picture_structure != PICT_FRAME;
1783 s->resync_mb_y = -1;
1785 av_assert0(mb_y < s->mb_height);
1787 init_get_bits(&s->gb, *buf, buf_size * 8);
1788 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1789 skip_bits(&s->gb, 3);
1791 ff_mpeg1_clean_buffers(s);
1792 s->interlaced_dct = 0;
1794 s->qscale = get_qscale(s);
1796 if (s->qscale == 0) {
1797 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1798 return AVERROR_INVALIDDATA;
1801 /* extra slice info */
1802 if (skip_1stop_8data_bits(&s->gb) < 0)
1803 return AVERROR_INVALIDDATA;
1807 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1810 while (get_bits_left(&s->gb) > 0) {
1811 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1812 MBINCR_VLC_BITS, 2);
1814 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1815 return AVERROR_INVALIDDATA;
1820 /* otherwise, stuffing, nothing to do */
1828 if (s->mb_x >= (unsigned) s->mb_width) {
1829 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1830 return AVERROR_INVALIDDATA;
1833 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1834 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1835 int start_code = -1;
1836 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1837 if (buf_end < *buf + buf_size)
1840 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1841 return DECODE_SLICE_ERROR;
1843 return DECODE_SLICE_OK;
1846 s->resync_mb_x = s->mb_x;
1847 s->resync_mb_y = s->mb_y = mb_y;
1849 ff_init_block_index(s);
1851 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1852 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1853 av_log(s->avctx, AV_LOG_DEBUG,
1854 "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",
1856 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1857 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1858 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1859 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1860 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1861 s->progressive_sequence ? "ps" : "",
1862 s->progressive_frame ? "pf" : "",
1863 s->alternate_scan ? "alt" : "",
1864 s->top_field_first ? "top" : "",
1865 s->intra_dc_precision, s->picture_structure,
1866 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1867 s->q_scale_type, s->intra_vlc_format,
1868 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1873 // If 1, we memcpy blocks in xvmcvideo.
1874 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1875 ff_xvmc_init_block(s); // set s->block
1877 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1880 // Note motion_val is normally NULL unless we want to extract the MVs.
1881 if (s->current_picture.motion_val[0] && !s->encoding) {
1882 const int wrap = s->b8_stride;
1883 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1884 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1885 int motion_x, motion_y, dir, i;
1887 for (i = 0; i < 2; i++) {
1888 for (dir = 0; dir < 2; dir++) {
1890 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1891 motion_x = motion_y = 0;
1892 } else if (s->mv_type == MV_TYPE_16X16 ||
1893 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1894 motion_x = s->mv[dir][0][0];
1895 motion_y = s->mv[dir][0][1];
1896 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1897 motion_x = s->mv[dir][i][0];
1898 motion_y = s->mv[dir][i][1];
1901 s->current_picture.motion_val[dir][xy][0] = motion_x;
1902 s->current_picture.motion_val[dir][xy][1] = motion_y;
1903 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1904 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1905 s->current_picture.ref_index [dir][b8_xy] =
1906 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1907 av_assert2(s->field_select[dir][i] == 0 ||
1908 s->field_select[dir][i] == 1);
1915 s->dest[0] += 16 >> lowres;
1916 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1917 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1919 ff_mpv_decode_mb(s, s->block);
1921 if (++s->mb_x >= s->mb_width) {
1922 const int mb_size = 16 >> s->avctx->lowres;
1924 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1925 ff_mpv_report_decode_progress(s);
1928 s->mb_y += 1 << field_pic;
1930 if (s->mb_y >= s->mb_height) {
1931 int left = get_bits_left(&s->gb);
1932 int is_d10 = s->chroma_format == 2 &&
1933 s->pict_type == AV_PICTURE_TYPE_I &&
1934 avctx->profile == 0 && avctx->level == 5 &&
1935 s->intra_dc_precision == 2 &&
1936 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1937 s->progressive_frame == 0
1938 /* vbv_delay == 0xBBB || 0xE10 */;
1940 if (left >= 32 && !is_d10) {
1941 GetBitContext gb = s->gb;
1942 align_get_bits(&gb);
1943 if (show_bits(&gb, 24) == 0x060E2B) {
1944 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1950 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1951 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1952 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1953 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0);
1954 return AVERROR_INVALIDDATA;
1958 // There are some files out there which are missing the last slice
1959 // in cases where the slice is completely outside the visible
1960 // area, we detect this here instead of running into the end expecting
1962 if (s->mb_y >= ((s->height + 15) >> 4) &&
1963 !s->progressive_sequence &&
1964 get_bits_left(&s->gb) <= 8 &&
1965 get_bits_left(&s->gb) >= 0 &&
1966 s->mb_skip_run == -1 &&
1967 show_bits(&s->gb, 8) == 0)
1970 ff_init_block_index(s);
1973 /* skip mb handling */
1974 if (s->mb_skip_run == -1) {
1975 /* read increment again */
1978 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1979 MBINCR_VLC_BITS, 2);
1981 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1982 return AVERROR_INVALIDDATA;
1986 s->mb_skip_run += 33;
1987 } else if (code == 35) {
1988 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1989 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1990 return AVERROR_INVALIDDATA;
1992 goto eos; /* end of slice */
1994 /* otherwise, stuffing, nothing to do */
1996 s->mb_skip_run += code;
2000 if (s->mb_skip_run) {
2002 if (s->pict_type == AV_PICTURE_TYPE_I) {
2003 av_log(s->avctx, AV_LOG_ERROR,
2004 "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
2005 return AVERROR_INVALIDDATA;
2010 for (i = 0; i < 12; i++)
2011 s->block_last_index[i] = -1;
2012 if (s->picture_structure == PICT_FRAME)
2013 s->mv_type = MV_TYPE_16X16;
2015 s->mv_type = MV_TYPE_FIELD;
2016 if (s->pict_type == AV_PICTURE_TYPE_P) {
2017 /* if P type, zero motion vector is implied */
2018 s->mv_dir = MV_DIR_FORWARD;
2019 s->mv[0][0][0] = s->mv[0][0][1] = 0;
2020 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
2021 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
2022 s->field_select[0][0] = (s->picture_structure - 1) & 1;
2024 /* if B type, reuse previous vectors and directions */
2025 s->mv[0][0][0] = s->last_mv[0][0][0];
2026 s->mv[0][0][1] = s->last_mv[0][0][1];
2027 s->mv[1][0][0] = s->last_mv[1][0][0];
2028 s->mv[1][0][1] = s->last_mv[1][0][1];
2033 eos: // end of slice
2034 if (get_bits_left(&s->gb) < 0) {
2035 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
2036 return AVERROR_INVALIDDATA;
2038 *buf += (get_bits_count(&s->gb) - 1) / 8;
2039 ff_dlog(s, "Slice start:%d %d end:%d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2043 static int slice_decode_thread(AVCodecContext *c, void *arg)
2045 MpegEncContext *s = *(void **) arg;
2046 const uint8_t *buf = s->gb.buffer;
2047 int mb_y = s->start_mb_y;
2048 const int field_pic = s->picture_structure != PICT_FRAME;
2050 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2053 uint32_t start_code;
2056 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2058 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2059 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2060 s->start_mb_y, s->end_mb_y, s->er.error_count);
2062 if (c->err_recognition & AV_EF_EXPLODE)
2064 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2065 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2067 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2069 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2070 s->mb_x - 1, s->mb_y,
2071 ER_AC_END | ER_DC_END | ER_MV_END);
2074 if (s->mb_y == s->end_mb_y)
2078 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2079 mb_y = start_code - SLICE_MIN_START_CODE;
2080 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2081 mb_y += (*buf&0xE0)<<2;
2083 if (s->picture_structure == PICT_BOTTOM_FIELD)
2085 if (mb_y < 0 || mb_y >= s->end_mb_y)
2086 return AVERROR_INVALIDDATA;
2091 * Handle slice ends.
2092 * @return 1 if it seems to be the last slice
2094 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2096 Mpeg1Context *s1 = avctx->priv_data;
2097 MpegEncContext *s = &s1->mpeg_enc_ctx;
2099 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2102 if (s->avctx->hwaccel) {
2103 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2105 av_log(avctx, AV_LOG_ERROR,
2106 "hardware accelerator failed to decode picture\n");
2111 /* end of slice reached */
2112 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2115 ff_er_frame_end(&s->er);
2117 ff_mpv_frame_end(s);
2119 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2120 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2123 ff_print_debug_info(s, s->current_picture_ptr, pict);
2124 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2126 if (avctx->active_thread_type & FF_THREAD_FRAME)
2127 s->picture_number++;
2128 /* latency of 1 frame for I- and P-frames */
2129 /* XXX: use another variable than picture_number */
2130 if (s->last_picture_ptr) {
2131 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2134 ff_print_debug_info(s, s->last_picture_ptr, pict);
2135 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2145 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2146 const uint8_t *buf, int buf_size)
2148 Mpeg1Context *s1 = avctx->priv_data;
2149 MpegEncContext *s = &s1->mpeg_enc_ctx;
2153 init_get_bits(&s->gb, buf, buf_size * 8);
2155 width = get_bits(&s->gb, 12);
2156 height = get_bits(&s->gb, 12);
2157 if (width == 0 || height == 0) {
2158 av_log(avctx, AV_LOG_WARNING,
2159 "Invalid horizontal or vertical size value.\n");
2160 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2161 return AVERROR_INVALIDDATA;
2163 s->aspect_ratio_info = get_bits(&s->gb, 4);
2164 if (s->aspect_ratio_info == 0) {
2165 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2166 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2167 return AVERROR_INVALIDDATA;
2169 s->frame_rate_index = get_bits(&s->gb, 4);
2170 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2171 av_log(avctx, AV_LOG_WARNING,
2172 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2173 s->frame_rate_index = 1;
2175 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2176 if (check_marker(&s->gb, "in sequence header") == 0) {
2177 return AVERROR_INVALIDDATA;
2180 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2181 skip_bits(&s->gb, 1);
2184 if (get_bits1(&s->gb)) {
2185 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2187 for (i = 0; i < 64; i++) {
2188 j = s->idsp.idct_permutation[i];
2189 v = ff_mpeg1_default_intra_matrix[i];
2190 s->intra_matrix[j] = v;
2191 s->chroma_intra_matrix[j] = v;
2194 if (get_bits1(&s->gb)) {
2195 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2197 for (i = 0; i < 64; i++) {
2198 int j = s->idsp.idct_permutation[i];
2199 v = ff_mpeg1_default_non_intra_matrix[i];
2200 s->inter_matrix[j] = v;
2201 s->chroma_inter_matrix[j] = v;
2205 if (show_bits(&s->gb, 23) != 0) {
2206 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2207 return AVERROR_INVALIDDATA;
2213 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2214 s->progressive_sequence = 1;
2215 s->progressive_frame = 1;
2216 s->picture_structure = PICT_FRAME;
2218 s->frame_pred_frame_dct = 1;
2219 s->chroma_format = 1;
2221 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2222 s->out_format = FMT_MPEG1;
2223 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2224 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2227 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2228 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2229 s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2234 static int vcr2_init_sequence(AVCodecContext *avctx)
2236 Mpeg1Context *s1 = avctx->priv_data;
2237 MpegEncContext *s = &s1->mpeg_enc_ctx;
2240 /* start new MPEG-1 context decoding */
2241 s->out_format = FMT_MPEG1;
2242 if (s1->mpeg_enc_ctx_allocated) {
2243 ff_mpv_common_end(s);
2244 s1->mpeg_enc_ctx_allocated = 0;
2246 s->width = avctx->coded_width;
2247 s->height = avctx->coded_height;
2248 avctx->has_b_frames = 0; // true?
2251 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2252 setup_hwaccel_for_pixfmt(avctx);
2254 ff_mpv_idct_init(s);
2255 if ((ret = ff_mpv_common_init(s)) < 0)
2257 s1->mpeg_enc_ctx_allocated = 1;
2259 for (i = 0; i < 64; i++) {
2260 int j = s->idsp.idct_permutation[i];
2261 v = ff_mpeg1_default_intra_matrix[i];
2262 s->intra_matrix[j] = v;
2263 s->chroma_intra_matrix[j] = v;
2265 v = ff_mpeg1_default_non_intra_matrix[i];
2266 s->inter_matrix[j] = v;
2267 s->chroma_inter_matrix[j] = v;
2270 s->progressive_sequence = 1;
2271 s->progressive_frame = 1;
2272 s->picture_structure = PICT_FRAME;
2274 s->frame_pred_frame_dct = 1;
2275 s->chroma_format = 1;
2276 if (s->codec_tag == AV_RL32("BW10")) {
2277 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2279 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2280 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2282 s1->save_width = s->width;
2283 s1->save_height = s->height;
2284 s1->save_progressive_seq = s->progressive_sequence;
2288 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2289 const uint8_t *p, int buf_size)
2291 Mpeg1Context *s1 = avctx->priv_data;
2293 if (buf_size >= 6 &&
2294 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2295 p[4] == 3 && (p[5] & 0x40)) {
2296 /* extract A53 Part 4 CC data */
2297 int cc_count = p[5] & 0x1f;
2298 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2299 av_freep(&s1->a53_caption);
2300 s1->a53_caption_size = cc_count * 3;
2301 s1->a53_caption = av_malloc(s1->a53_caption_size);
2302 if (s1->a53_caption)
2303 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2306 } else if (buf_size >= 11 &&
2307 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2308 /* extract DVD CC data */
2311 // There is a caption count field in the data, but it is often
2312 // incorect. So count the number of captions present.
2313 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2315 // Transform the DVD format into A53 Part 4 format
2317 av_freep(&s1->a53_caption);
2318 s1->a53_caption_size = cc_count * 6;
2319 s1->a53_caption = av_malloc(s1->a53_caption_size);
2320 if (s1->a53_caption) {
2321 uint8_t field1 = !!(p[4] & 0x80);
2322 uint8_t *cap = s1->a53_caption;
2324 for (i = 0; i < cc_count; i++) {
2325 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2328 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2341 static void mpeg_decode_user_data(AVCodecContext *avctx,
2342 const uint8_t *p, int buf_size)
2344 Mpeg1Context *s = avctx->priv_data;
2345 const uint8_t *buf_end = p + buf_size;
2346 Mpeg1Context *s1 = avctx->priv_data;
2350 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2351 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2353 av_log(avctx, AV_LOG_ERROR, "\n");
2359 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2363 /* we parse the DTG active format information */
2364 if (buf_end - p >= 5 &&
2365 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2373 if (buf_end - p < 1)
2376 FF_DISABLE_DEPRECATION_WARNINGS
2377 avctx->dtg_active_format = p[0] & 0x0f;
2378 FF_ENABLE_DEPRECATION_WARNINGS
2379 #endif /* FF_API_AFD */
2381 s1->afd = p[0] & 0x0f;
2383 } else if (buf_end - p >= 6 &&
2384 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2385 p[4] == 0x03) { // S3D_video_format_length
2386 // the 0x7F mask ignores the reserved_bit value
2387 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2389 if (S3D_video_format_type == 0x03 ||
2390 S3D_video_format_type == 0x04 ||
2391 S3D_video_format_type == 0x08 ||
2392 S3D_video_format_type == 0x23) {
2394 s1->has_stereo3d = 1;
2396 switch (S3D_video_format_type) {
2398 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2401 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2404 s1->stereo3d.type = AV_STEREO3D_2D;
2407 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2411 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2416 static void mpeg_decode_gop(AVCodecContext *avctx,
2417 const uint8_t *buf, int buf_size)
2419 Mpeg1Context *s1 = avctx->priv_data;
2420 MpegEncContext *s = &s1->mpeg_enc_ctx;
2424 init_get_bits(&s->gb, buf, buf_size * 8);
2426 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2428 s->closed_gop = get_bits1(&s->gb);
2429 /* broken_link indicate that after editing the
2430 * reference frames of the first B-Frames after GOP I-Frame
2431 * are missing (open gop) */
2432 broken_link = get_bits1(&s->gb);
2434 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2435 char tcbuf[AV_TIMECODE_STR_SIZE];
2436 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2437 av_log(s->avctx, AV_LOG_DEBUG,
2438 "GOP (%s) closed_gop=%d broken_link=%d\n",
2439 tcbuf, s->closed_gop, broken_link);
2443 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2444 int *got_output, const uint8_t *buf, int buf_size)
2446 Mpeg1Context *s = avctx->priv_data;
2447 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2448 const uint8_t *buf_ptr = buf;
2449 const uint8_t *buf_end = buf + buf_size;
2450 int ret, input_size;
2451 int last_code = 0, skip_frame = 0;
2452 int picture_start_code_seen = 0;
2455 /* find next start code */
2456 uint32_t start_code = -1;
2457 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2458 if (start_code > 0x1ff) {
2461 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2464 av_assert0(avctx->thread_count > 1);
2466 avctx->execute(avctx, slice_decode_thread,
2467 &s2->thread_context[0], NULL,
2468 s->slice_count, sizeof(void *));
2469 for (i = 0; i < s->slice_count; i++)
2470 s2->er.error_count += s2->thread_context[i]->er.error_count;
2474 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2475 && uses_vdpau(avctx))
2476 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2479 ret = slice_end(avctx, picture);
2483 // FIXME: merge with the stuff in mpeg_decode_slice
2484 if (s2->last_picture_ptr || s2->low_delay)
2490 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2491 return AVERROR_INVALIDDATA;
2493 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2496 input_size = buf_end - buf_ptr;
2498 if (avctx->debug & FF_DEBUG_STARTCODE)
2499 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2500 start_code, buf_ptr - buf, input_size);
2502 /* prepare data for next start code */
2503 switch (start_code) {
2504 case SEQ_START_CODE:
2505 if (last_code == 0) {
2506 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2507 if (buf != avctx->extradata)
2510 av_log(avctx, AV_LOG_ERROR,
2511 "ignoring SEQ_START_CODE after %X\n", last_code);
2512 if (avctx->err_recognition & AV_EF_EXPLODE)
2513 return AVERROR_INVALIDDATA;
2517 case PICTURE_START_CODE:
2518 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2519 /* If it's a frame picture, there can't be more than one picture header.
2520 Yet, it does happen and we need to handle it. */
2521 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2524 picture_start_code_seen = 1;
2526 if (s2->width <= 0 || s2->height <= 0) {
2527 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2528 s2->width, s2->height);
2529 return AVERROR_INVALIDDATA;
2533 s2->intra_dc_precision= 3;
2534 s2->intra_matrix[0]= 1;
2536 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2537 !avctx->hwaccel && s->slice_count) {
2540 avctx->execute(avctx, slice_decode_thread,
2541 s2->thread_context, NULL,
2542 s->slice_count, sizeof(void *));
2543 for (i = 0; i < s->slice_count; i++)
2544 s2->er.error_count += s2->thread_context[i]->er.error_count;
2547 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2548 ret = mpeg_decode_postinit(avctx);
2550 av_log(avctx, AV_LOG_ERROR,
2551 "mpeg_decode_postinit() failure\n");
2555 /* We have a complete image: we try to decompress it. */
2556 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2559 last_code = PICTURE_START_CODE;
2561 av_log(avctx, AV_LOG_ERROR,
2562 "ignoring pic after %X\n", last_code);
2563 if (avctx->err_recognition & AV_EF_EXPLODE)
2564 return AVERROR_INVALIDDATA;
2567 case EXT_START_CODE:
2568 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2570 switch (get_bits(&s2->gb, 4)) {
2572 if (last_code == 0) {
2573 mpeg_decode_sequence_extension(s);
2575 av_log(avctx, AV_LOG_ERROR,
2576 "ignoring seq ext after %X\n", last_code);
2577 if (avctx->err_recognition & AV_EF_EXPLODE)
2578 return AVERROR_INVALIDDATA;
2582 mpeg_decode_sequence_display_extension(s);
2585 mpeg_decode_quant_matrix_extension(s2);
2588 mpeg_decode_picture_display_extension(s);
2591 if (last_code == PICTURE_START_CODE) {
2592 mpeg_decode_picture_coding_extension(s);
2594 av_log(avctx, AV_LOG_ERROR,
2595 "ignoring pic cod ext after %X\n", last_code);
2596 if (avctx->err_recognition & AV_EF_EXPLODE)
2597 return AVERROR_INVALIDDATA;
2602 case USER_START_CODE:
2603 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2605 case GOP_START_CODE:
2606 if (last_code == 0) {
2607 s2->first_field = 0;
2608 mpeg_decode_gop(avctx, buf_ptr, input_size);
2611 av_log(avctx, AV_LOG_ERROR,
2612 "ignoring GOP_START_CODE after %X\n", last_code);
2613 if (avctx->err_recognition & AV_EF_EXPLODE)
2614 return AVERROR_INVALIDDATA;
2618 if (start_code >= SLICE_MIN_START_CODE &&
2619 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2620 if (s2->progressive_sequence && !s2->progressive_frame) {
2621 s2->progressive_frame = 1;
2622 av_log(s2->avctx, AV_LOG_ERROR,
2623 "interlaced frame in progressive sequence, ignoring\n");
2626 if (s2->picture_structure == 0 ||
2627 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2628 av_log(s2->avctx, AV_LOG_ERROR,
2629 "picture_structure %d invalid, ignoring\n",
2630 s2->picture_structure);
2631 s2->picture_structure = PICT_FRAME;
2634 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2635 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2637 if (s2->picture_structure == PICT_FRAME) {
2638 s2->first_field = 0;
2639 s2->v_edge_pos = 16 * s2->mb_height;
2641 s2->first_field ^= 1;
2642 s2->v_edge_pos = 8 * s2->mb_height;
2643 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2646 if (start_code >= SLICE_MIN_START_CODE &&
2647 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2648 const int field_pic = s2->picture_structure != PICT_FRAME;
2649 int mb_y = start_code - SLICE_MIN_START_CODE;
2650 last_code = SLICE_MIN_START_CODE;
2651 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2652 mb_y += (*buf_ptr&0xE0)<<2;
2655 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2658 if (buf_end - buf_ptr < 2) {
2659 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2660 return AVERROR_INVALIDDATA;
2663 if (mb_y >= s2->mb_height) {
2664 av_log(s2->avctx, AV_LOG_ERROR,
2665 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2666 return AVERROR_INVALIDDATA;
2669 if (!s2->last_picture_ptr) {
2670 /* Skip B-frames if we do not have reference frames and
2671 * GOP is not closed. */
2672 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2673 if (!s2->closed_gop) {
2679 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2681 if (!s2->next_picture_ptr) {
2682 /* Skip P-frames if we do not have a reference frame or
2683 * we have an invalid header. */
2684 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2689 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2690 s2->pict_type == AV_PICTURE_TYPE_B) ||
2691 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2692 s2->pict_type != AV_PICTURE_TYPE_I) ||
2693 avctx->skip_frame >= AVDISCARD_ALL) {
2698 if (!s->mpeg_enc_ctx_allocated)
2701 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2702 if (mb_y < avctx->skip_top ||
2703 mb_y >= s2->mb_height - avctx->skip_bottom)
2707 if (!s2->pict_type) {
2708 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2709 if (avctx->err_recognition & AV_EF_EXPLODE)
2710 return AVERROR_INVALIDDATA;
2714 if (s->first_slice) {
2717 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2720 if (!s2->current_picture_ptr) {
2721 av_log(avctx, AV_LOG_ERROR,
2722 "current_picture not initialized\n");
2723 return AVERROR_INVALIDDATA;
2727 if (uses_vdpau(avctx)) {
2734 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2736 int threshold = (s2->mb_height * s->slice_count +
2737 s2->slice_context_count / 2) /
2738 s2->slice_context_count;
2739 av_assert0(avctx->thread_count > 1);
2740 if (threshold <= mb_y) {
2741 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2743 thread_context->start_mb_y = mb_y;
2744 thread_context->end_mb_y = s2->mb_height;
2745 if (s->slice_count) {
2746 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2747 ret = ff_update_duplicate_context(thread_context, s2);
2751 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2754 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2756 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2760 if (avctx->err_recognition & AV_EF_EXPLODE)
2762 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2763 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2764 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2765 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2767 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2768 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2769 ER_AC_END | ER_DC_END | ER_MV_END);
2778 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2779 int *got_output, AVPacket *avpkt)
2781 const uint8_t *buf = avpkt->data;
2783 int buf_size = avpkt->size;
2784 Mpeg1Context *s = avctx->priv_data;
2785 AVFrame *picture = data;
2786 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2788 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2789 /* special case for last picture */
2790 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2791 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2795 s2->next_picture_ptr = NULL;
2802 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2803 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2806 if (ff_combine_frame(&s2->parse_context, next,
2807 (const uint8_t **) &buf, &buf_size) < 0)
2811 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2812 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2813 || s2->codec_tag == AV_RL32("BW10")
2815 vcr2_init_sequence(avctx);
2819 if (avctx->extradata && !s->extradata_decoded) {
2820 ret = decode_chunks(avctx, picture, got_output,
2821 avctx->extradata, avctx->extradata_size);
2823 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2826 s->extradata_decoded = 1;
2827 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2828 s2->current_picture_ptr = NULL;
2833 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2834 if (ret<0 || *got_output)
2835 s2->current_picture_ptr = NULL;
2840 static void flush(AVCodecContext *avctx)
2842 Mpeg1Context *s = avctx->priv_data;
2846 ff_mpeg_flush(avctx);
2849 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2851 Mpeg1Context *s = avctx->priv_data;
2853 if (s->mpeg_enc_ctx_allocated)
2854 ff_mpv_common_end(&s->mpeg_enc_ctx);
2855 av_freep(&s->a53_caption);
2859 AVCodec ff_mpeg1video_decoder = {
2860 .name = "mpeg1video",
2861 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2862 .type = AVMEDIA_TYPE_VIDEO,
2863 .id = AV_CODEC_ID_MPEG1VIDEO,
2864 .priv_data_size = sizeof(Mpeg1Context),
2865 .init = mpeg_decode_init,
2866 .close = mpeg_decode_end,
2867 .decode = mpeg_decode_frame,
2868 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2869 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2870 AV_CODEC_CAP_SLICE_THREADS,
2873 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2876 AVCodec ff_mpeg2video_decoder = {
2877 .name = "mpeg2video",
2878 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2879 .type = AVMEDIA_TYPE_VIDEO,
2880 .id = AV_CODEC_ID_MPEG2VIDEO,
2881 .priv_data_size = sizeof(Mpeg1Context),
2882 .init = mpeg_decode_init,
2883 .close = mpeg_decode_end,
2884 .decode = mpeg_decode_frame,
2885 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2886 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2887 AV_CODEC_CAP_SLICE_THREADS,
2890 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2894 AVCodec ff_mpegvideo_decoder = {
2895 .name = "mpegvideo",
2896 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2897 .type = AVMEDIA_TYPE_VIDEO,
2898 .id = AV_CODEC_ID_MPEG2VIDEO,
2899 .priv_data_size = sizeof(Mpeg1Context),
2900 .init = mpeg_decode_init,
2901 .close = mpeg_decode_end,
2902 .decode = mpeg_decode_frame,
2903 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2909 #if CONFIG_MPEG_XVMC_DECODER
2910 FF_DISABLE_DEPRECATION_WARNINGS
2911 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2913 if (avctx->active_thread_type & FF_THREAD_SLICE)
2915 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2917 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2918 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2920 mpeg_decode_init(avctx);
2922 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2923 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2928 AVCodec ff_mpeg_xvmc_decoder = {
2929 .name = "mpegvideo_xvmc",
2930 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2931 .type = AVMEDIA_TYPE_VIDEO,
2932 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2933 .priv_data_size = sizeof(Mpeg1Context),
2934 .init = mpeg_mc_decode_init,
2935 .close = mpeg_decode_end,
2936 .decode = mpeg_decode_frame,
2937 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2938 AV_CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL |
2942 FF_ENABLE_DEPRECATION_WARNINGS
2944 #endif /* FF_API_XVMC */
2946 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
2947 AVCodec ff_mpeg_vdpau_decoder = {
2948 .name = "mpegvideo_vdpau",
2949 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2950 .type = AVMEDIA_TYPE_VIDEO,
2951 .id = AV_CODEC_ID_MPEG2VIDEO,
2952 .priv_data_size = sizeof(Mpeg1Context),
2953 .init = mpeg_decode_init,
2954 .close = mpeg_decode_end,
2955 .decode = mpeg_decode_frame,
2956 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2957 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,
2962 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
2963 AVCodec ff_mpeg1_vdpau_decoder = {
2964 .name = "mpeg1video_vdpau",
2965 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2966 .type = AVMEDIA_TYPE_VIDEO,
2967 .id = AV_CODEC_ID_MPEG1VIDEO,
2968 .priv_data_size = sizeof(Mpeg1Context),
2969 .init = mpeg_decode_init,
2970 .close = mpeg_decode_end,
2971 .decode = mpeg_decode_frame,
2972 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2973 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,