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"
49 #include "vdpau_compat.h"
50 #include "xvmc_internal.h"
52 typedef struct Mpeg1Context {
53 MpegEncContext mpeg_enc_ctx;
54 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
55 int repeat_field; /* true if we must repeat the field */
56 AVPanScan pan_scan; /* some temporary storage for the panscan */
64 AVRational save_aspect;
65 int save_width, save_height, save_progressive_seq;
66 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
67 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
70 int extradata_decoded;
73 #define MB_TYPE_ZERO_MV 0x20000000
75 static const uint32_t ptype2mb_type[7] = {
77 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
79 MB_TYPE_L0 | MB_TYPE_CBP,
80 MB_TYPE_QUANT | MB_TYPE_INTRA,
81 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
82 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
85 static const uint32_t btype2mb_type[11] = {
88 MB_TYPE_L1 | MB_TYPE_CBP,
90 MB_TYPE_L0 | MB_TYPE_CBP,
92 MB_TYPE_L0L1 | MB_TYPE_CBP,
93 MB_TYPE_QUANT | MB_TYPE_INTRA,
94 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
95 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
96 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
99 /* as H.263, but only 17 codes */
100 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
102 int code, sign, val, shift;
104 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
110 sign = get_bits1(&s->gb);
114 val = (val - 1) << shift;
115 val |= get_bits(&s->gb, shift);
122 /* modulo decoding */
123 return sign_extend(val, 5 + shift);
126 #define check_scantable_index(ctx, x) \
129 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
130 ctx->mb_x, ctx->mb_y); \
131 return AVERROR_INVALIDDATA; \
135 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
136 int16_t *block, int n)
138 int level, dc, diff, i, j, run;
140 RLTable *rl = &ff_rl_mpeg1;
141 uint8_t *const scantable = s->intra_scantable.permutated;
142 const uint16_t *quant_matrix = s->intra_matrix;
143 const int qscale = s->qscale;
146 component = (n <= 3 ? 0 : n - 4 + 1);
147 diff = decode_dc(&s->gb, component);
149 return AVERROR_INVALIDDATA;
150 dc = s->last_dc[component];
152 s->last_dc[component] = dc;
153 block[0] = dc * quant_matrix[0];
154 ff_tlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
157 OPEN_READER(re, &s->gb);
158 UPDATE_CACHE(re, &s->gb);
159 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
162 /* now quantify & encode AC coefficients */
164 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
169 check_scantable_index(s, i);
171 level = (level * qscale * quant_matrix[j]) >> 4;
172 level = (level - 1) | 1;
173 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
174 SHOW_SBITS(re, &s->gb, 1);
175 SKIP_BITS(re, &s->gb, 1);
178 run = SHOW_UBITS(re, &s->gb, 6) + 1;
179 LAST_SKIP_BITS(re, &s->gb, 6);
180 UPDATE_CACHE(re, &s->gb);
181 level = SHOW_SBITS(re, &s->gb, 8);
182 SKIP_BITS(re, &s->gb, 8);
184 level = SHOW_UBITS(re, &s->gb, 8) - 256;
185 SKIP_BITS(re, &s->gb, 8);
186 } else if (level == 0) {
187 level = SHOW_UBITS(re, &s->gb, 8);
188 SKIP_BITS(re, &s->gb, 8);
191 check_scantable_index(s, i);
195 level = (level * qscale * quant_matrix[j]) >> 4;
196 level = (level - 1) | 1;
199 level = (level * qscale * quant_matrix[j]) >> 4;
200 level = (level - 1) | 1;
205 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
208 UPDATE_CACHE(re, &s->gb);
211 LAST_SKIP_BITS(re, &s->gb, 2);
212 CLOSE_READER(re, &s->gb);
214 s->block_last_index[n] = i;
218 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
220 return mpeg1_decode_block_intra(s, block, n);
223 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
224 int16_t *block, int n)
226 int level, i, j, run;
227 RLTable *rl = &ff_rl_mpeg1;
228 uint8_t *const scantable = s->intra_scantable.permutated;
229 const uint16_t *quant_matrix = s->inter_matrix;
230 const int qscale = s->qscale;
233 OPEN_READER(re, &s->gb);
235 // special case for first coefficient, no need to add second VLC table
236 UPDATE_CACHE(re, &s->gb);
237 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
238 level = (3 * qscale * quant_matrix[0]) >> 5;
239 level = (level - 1) | 1;
240 if (GET_CACHE(re, &s->gb) & 0x40000000)
244 SKIP_BITS(re, &s->gb, 2);
245 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
248 /* now quantify & encode AC coefficients */
250 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
255 check_scantable_index(s, i);
257 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
258 level = (level - 1) | 1;
259 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
260 SHOW_SBITS(re, &s->gb, 1);
261 SKIP_BITS(re, &s->gb, 1);
264 run = SHOW_UBITS(re, &s->gb, 6) + 1;
265 LAST_SKIP_BITS(re, &s->gb, 6);
266 UPDATE_CACHE(re, &s->gb);
267 level = SHOW_SBITS(re, &s->gb, 8);
268 SKIP_BITS(re, &s->gb, 8);
270 level = SHOW_UBITS(re, &s->gb, 8) - 256;
271 SKIP_BITS(re, &s->gb, 8);
272 } else if (level == 0) {
273 level = SHOW_UBITS(re, &s->gb, 8);
274 SKIP_BITS(re, &s->gb, 8);
277 check_scantable_index(s, i);
281 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
282 level = (level - 1) | 1;
285 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
286 level = (level - 1) | 1;
291 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
293 UPDATE_CACHE(re, &s->gb);
296 LAST_SKIP_BITS(re, &s->gb, 2);
297 CLOSE_READER(re, &s->gb);
299 s->block_last_index[n] = i;
304 * Note: this function can read out of range and crash for corrupt streams.
305 * Changing this would eat up any speed benefits it has.
306 * Do not use "fast" flag if you need the code to be robust.
308 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
309 int16_t *block, int n)
311 int level, i, j, run;
312 RLTable *rl = &ff_rl_mpeg1;
313 uint8_t *const scantable = s->intra_scantable.permutated;
314 const int qscale = s->qscale;
317 OPEN_READER(re, &s->gb);
319 // Special case for first coefficient, no need to add second VLC table.
320 UPDATE_CACHE(re, &s->gb);
321 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
322 level = (3 * qscale) >> 1;
323 level = (level - 1) | 1;
324 if (GET_CACHE(re, &s->gb) & 0x40000000)
328 SKIP_BITS(re, &s->gb, 2);
329 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
333 /* now quantify & encode AC coefficients */
335 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
340 check_scantable_index(s, i);
342 level = ((level * 2 + 1) * qscale) >> 1;
343 level = (level - 1) | 1;
344 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
345 SHOW_SBITS(re, &s->gb, 1);
346 SKIP_BITS(re, &s->gb, 1);
349 run = SHOW_UBITS(re, &s->gb, 6) + 1;
350 LAST_SKIP_BITS(re, &s->gb, 6);
351 UPDATE_CACHE(re, &s->gb);
352 level = SHOW_SBITS(re, &s->gb, 8);
353 SKIP_BITS(re, &s->gb, 8);
355 level = SHOW_UBITS(re, &s->gb, 8) - 256;
356 SKIP_BITS(re, &s->gb, 8);
357 } else if (level == 0) {
358 level = SHOW_UBITS(re, &s->gb, 8);
359 SKIP_BITS(re, &s->gb, 8);
362 check_scantable_index(s, i);
366 level = ((level * 2 + 1) * qscale) >> 1;
367 level = (level - 1) | 1;
370 level = ((level * 2 + 1) * qscale) >> 1;
371 level = (level - 1) | 1;
376 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
378 UPDATE_CACHE(re, &s->gb);
381 LAST_SKIP_BITS(re, &s->gb, 2);
382 CLOSE_READER(re, &s->gb);
384 s->block_last_index[n] = i;
388 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
389 int16_t *block, int n)
391 int level, i, j, run;
392 RLTable *rl = &ff_rl_mpeg1;
393 uint8_t *const scantable = s->intra_scantable.permutated;
394 const uint16_t *quant_matrix;
395 const int qscale = s->qscale;
401 OPEN_READER(re, &s->gb);
404 quant_matrix = s->inter_matrix;
406 quant_matrix = s->chroma_inter_matrix;
408 // Special case for first coefficient, no need to add second VLC table.
409 UPDATE_CACHE(re, &s->gb);
410 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
411 level = (3 * qscale * quant_matrix[0]) >> 5;
412 if (GET_CACHE(re, &s->gb) & 0x40000000)
417 SKIP_BITS(re, &s->gb, 2);
418 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
422 /* now quantify & encode AC coefficients */
424 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
429 check_scantable_index(s, i);
431 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
432 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
433 SHOW_SBITS(re, &s->gb, 1);
434 SKIP_BITS(re, &s->gb, 1);
437 run = SHOW_UBITS(re, &s->gb, 6) + 1;
438 LAST_SKIP_BITS(re, &s->gb, 6);
439 UPDATE_CACHE(re, &s->gb);
440 level = SHOW_SBITS(re, &s->gb, 12);
441 SKIP_BITS(re, &s->gb, 12);
444 check_scantable_index(s, i);
447 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
450 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
456 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
458 UPDATE_CACHE(re, &s->gb);
461 LAST_SKIP_BITS(re, &s->gb, 2);
462 CLOSE_READER(re, &s->gb);
464 block[63] ^= (mismatch & 1);
466 s->block_last_index[n] = i;
471 * Note: this function can read out of range and crash for corrupt streams.
472 * Changing this would eat up any speed benefits it has.
473 * Do not use "fast" flag if you need the code to be robust.
475 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
476 int16_t *block, int n)
478 int level, i, j, run;
479 RLTable *rl = &ff_rl_mpeg1;
480 uint8_t *const scantable = s->intra_scantable.permutated;
481 const int qscale = s->qscale;
482 OPEN_READER(re, &s->gb);
485 // special case for first coefficient, no need to add second VLC table
486 UPDATE_CACHE(re, &s->gb);
487 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
488 level = (3 * qscale) >> 1;
489 if (GET_CACHE(re, &s->gb) & 0x40000000)
493 SKIP_BITS(re, &s->gb, 2);
494 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
498 /* now quantify & encode AC coefficients */
500 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
505 level = ((level * 2 + 1) * qscale) >> 1;
506 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
507 SHOW_SBITS(re, &s->gb, 1);
508 SKIP_BITS(re, &s->gb, 1);
511 run = SHOW_UBITS(re, &s->gb, 6) + 1;
512 LAST_SKIP_BITS(re, &s->gb, 6);
513 UPDATE_CACHE(re, &s->gb);
514 level = SHOW_SBITS(re, &s->gb, 12);
515 SKIP_BITS(re, &s->gb, 12);
520 level = ((-level * 2 + 1) * qscale) >> 1;
523 level = ((level * 2 + 1) * qscale) >> 1;
528 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
531 UPDATE_CACHE(re, &s->gb);
534 LAST_SKIP_BITS(re, &s->gb, 2);
535 CLOSE_READER(re, &s->gb);
536 s->block_last_index[n] = i;
540 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
541 int16_t *block, int n)
543 int level, dc, diff, i, j, run;
546 uint8_t *const scantable = s->intra_scantable.permutated;
547 const uint16_t *quant_matrix;
548 const int qscale = s->qscale;
553 quant_matrix = s->intra_matrix;
556 quant_matrix = s->chroma_intra_matrix;
557 component = (n & 1) + 1;
559 diff = decode_dc(&s->gb, component);
561 return AVERROR_INVALIDDATA;
562 dc = s->last_dc[component];
564 s->last_dc[component] = dc;
565 block[0] = dc << (3 - s->intra_dc_precision);
566 ff_tlog(s->avctx, "dc=%d\n", block[0]);
567 mismatch = block[0] ^ 1;
569 if (s->intra_vlc_format)
575 OPEN_READER(re, &s->gb);
576 /* now quantify & encode AC coefficients */
578 UPDATE_CACHE(re, &s->gb);
579 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
584 } else if (level != 0) {
586 check_scantable_index(s, i);
588 level = (level * qscale * quant_matrix[j]) >> 4;
589 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
590 SHOW_SBITS(re, &s->gb, 1);
591 LAST_SKIP_BITS(re, &s->gb, 1);
594 run = SHOW_UBITS(re, &s->gb, 6) + 1;
595 LAST_SKIP_BITS(re, &s->gb, 6);
596 UPDATE_CACHE(re, &s->gb);
597 level = SHOW_SBITS(re, &s->gb, 12);
598 SKIP_BITS(re, &s->gb, 12);
600 check_scantable_index(s, i);
603 level = (-level * qscale * quant_matrix[j]) >> 4;
606 level = (level * qscale * quant_matrix[j]) >> 4;
613 CLOSE_READER(re, &s->gb);
615 block[63] ^= mismatch & 1;
617 s->block_last_index[n] = i;
622 * Note: this function can read out of range and crash for corrupt streams.
623 * Changing this would eat up any speed benefits it has.
624 * Do not use "fast" flag if you need the code to be robust.
626 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
627 int16_t *block, int n)
629 int level, dc, diff, i, j, run;
632 uint8_t *const scantable = s->intra_scantable.permutated;
633 const uint16_t *quant_matrix;
634 const int qscale = s->qscale;
638 quant_matrix = s->intra_matrix;
641 quant_matrix = s->chroma_intra_matrix;
642 component = (n & 1) + 1;
644 diff = decode_dc(&s->gb, component);
646 return AVERROR_INVALIDDATA;
647 dc = s->last_dc[component];
649 s->last_dc[component] = dc;
650 block[0] = dc << (3 - s->intra_dc_precision);
652 if (s->intra_vlc_format)
658 OPEN_READER(re, &s->gb);
659 /* now quantify & encode AC coefficients */
661 UPDATE_CACHE(re, &s->gb);
662 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
665 if (level >= 64 || i > 63) {
667 } else if (level != 0) {
670 level = (level * qscale * quant_matrix[j]) >> 4;
671 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
672 SHOW_SBITS(re, &s->gb, 1);
673 LAST_SKIP_BITS(re, &s->gb, 1);
676 run = SHOW_UBITS(re, &s->gb, 6) + 1;
677 LAST_SKIP_BITS(re, &s->gb, 6);
678 UPDATE_CACHE(re, &s->gb);
679 level = SHOW_SBITS(re, &s->gb, 12);
680 SKIP_BITS(re, &s->gb, 12);
684 level = (-level * qscale * quant_matrix[j]) >> 4;
687 level = (level * qscale * quant_matrix[j]) >> 4;
693 CLOSE_READER(re, &s->gb);
696 s->block_last_index[n] = i;
700 /******************************************/
703 static inline int get_dmv(MpegEncContext *s)
705 if (get_bits1(&s->gb))
706 return 1 - (get_bits1(&s->gb) << 1);
711 static inline int get_qscale(MpegEncContext *s)
713 int qscale = get_bits(&s->gb, 5);
715 return ff_mpeg2_non_linear_qscale[qscale];
721 /* motion type (for MPEG-2) */
727 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
729 int i, j, k, cbp, val, mb_type, motion_type;
730 const int mb_block_count = 4 + (1 << s->chroma_format);
733 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
735 av_assert2(s->mb_skipped == 0);
737 if (s->mb_skip_run-- != 0) {
738 if (s->pict_type == AV_PICTURE_TYPE_P) {
740 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
741 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
746 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
748 // FIXME not sure if this is allowed in MPEG at all
749 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
750 if (IS_INTRA(mb_type)) {
751 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
752 return AVERROR_INVALIDDATA;
754 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
755 mb_type | MB_TYPE_SKIP;
757 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
764 switch (s->pict_type) {
766 case AV_PICTURE_TYPE_I:
767 if (get_bits1(&s->gb) == 0) {
768 if (get_bits1(&s->gb) == 0) {
769 av_log(s->avctx, AV_LOG_ERROR,
770 "invalid mb type in I Frame at %d %d\n",
772 return AVERROR_INVALIDDATA;
774 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
776 mb_type = MB_TYPE_INTRA;
779 case AV_PICTURE_TYPE_P:
780 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
782 av_log(s->avctx, AV_LOG_ERROR,
783 "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
784 return AVERROR_INVALIDDATA;
786 mb_type = ptype2mb_type[mb_type];
788 case AV_PICTURE_TYPE_B:
789 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
791 av_log(s->avctx, AV_LOG_ERROR,
792 "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
793 return AVERROR_INVALIDDATA;
795 mb_type = btype2mb_type[mb_type];
798 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
799 // motion_type = 0; /* avoid warning */
800 if (IS_INTRA(mb_type)) {
801 s->bdsp.clear_blocks(s->block[0]);
803 if (!s->chroma_y_shift)
804 s->bdsp.clear_blocks(s->block[6]);
806 /* compute DCT type */
807 // FIXME: add an interlaced_dct coded var?
808 if (s->picture_structure == PICT_FRAME &&
809 !s->frame_pred_frame_dct)
810 s->interlaced_dct = get_bits1(&s->gb);
812 if (IS_QUANT(mb_type))
813 s->qscale = get_qscale(s);
815 if (s->concealment_motion_vectors) {
816 /* just parse them */
817 if (s->picture_structure != PICT_FRAME)
818 skip_bits1(&s->gb); /* field select */
821 s->last_mv[0][0][0] =
822 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
823 s->last_mv[0][0][0]);
825 s->last_mv[0][0][1] =
826 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
827 s->last_mv[0][0][1]);
829 check_marker(&s->gb, "after concealment_motion_vectors");
831 /* reset mv prediction */
832 memset(s->last_mv, 0, sizeof(s->last_mv));
835 // if 1, we memcpy blocks in xvmcvideo
836 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
837 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
839 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
840 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
841 for (i = 0; i < 6; i++)
842 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
844 for (i = 0; i < mb_block_count; i++)
845 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
849 for (i = 0; i < 6; i++)
850 if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0)
854 if (mb_type & MB_TYPE_ZERO_MV) {
855 av_assert2(mb_type & MB_TYPE_CBP);
857 s->mv_dir = MV_DIR_FORWARD;
858 if (s->picture_structure == PICT_FRAME) {
859 if (s->picture_structure == PICT_FRAME
860 && !s->frame_pred_frame_dct)
861 s->interlaced_dct = get_bits1(&s->gb);
862 s->mv_type = MV_TYPE_16X16;
864 s->mv_type = MV_TYPE_FIELD;
865 mb_type |= MB_TYPE_INTERLACED;
866 s->field_select[0][0] = s->picture_structure - 1;
869 if (IS_QUANT(mb_type))
870 s->qscale = get_qscale(s);
872 s->last_mv[0][0][0] = 0;
873 s->last_mv[0][0][1] = 0;
874 s->last_mv[0][1][0] = 0;
875 s->last_mv[0][1][1] = 0;
879 av_assert2(mb_type & MB_TYPE_L0L1);
880 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
881 /* get additional motion vector type */
882 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
883 motion_type = MT_FRAME;
885 motion_type = get_bits(&s->gb, 2);
886 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
887 s->interlaced_dct = get_bits1(&s->gb);
890 if (IS_QUANT(mb_type))
891 s->qscale = get_qscale(s);
894 s->mv_dir = (mb_type >> 13) & 3;
895 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
896 switch (motion_type) {
897 case MT_FRAME: /* or MT_16X8 */
898 if (s->picture_structure == PICT_FRAME) {
899 mb_type |= MB_TYPE_16x16;
900 s->mv_type = MV_TYPE_16X16;
901 for (i = 0; i < 2; i++) {
902 if (USES_LIST(mb_type, i)) {
905 s->last_mv[i][0][0] =
906 s->last_mv[i][1][0] =
907 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
908 s->last_mv[i][0][0]);
910 s->last_mv[i][0][1] =
911 s->last_mv[i][1][1] =
912 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
913 s->last_mv[i][0][1]);
914 /* full_pel: only for MPEG-1 */
915 if (s->full_pel[i]) {
916 s->mv[i][0][0] <<= 1;
917 s->mv[i][0][1] <<= 1;
922 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
923 s->mv_type = MV_TYPE_16X8;
924 for (i = 0; i < 2; i++) {
925 if (USES_LIST(mb_type, i)) {
927 for (j = 0; j < 2; j++) {
928 s->field_select[i][j] = get_bits1(&s->gb);
929 for (k = 0; k < 2; k++) {
930 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
931 s->last_mv[i][j][k]);
932 s->last_mv[i][j][k] = val;
933 s->mv[i][j][k] = val;
941 s->mv_type = MV_TYPE_FIELD;
942 if (s->picture_structure == PICT_FRAME) {
943 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
944 for (i = 0; i < 2; i++) {
945 if (USES_LIST(mb_type, i)) {
946 for (j = 0; j < 2; j++) {
947 s->field_select[i][j] = get_bits1(&s->gb);
948 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
949 s->last_mv[i][j][0]);
950 s->last_mv[i][j][0] = val;
951 s->mv[i][j][0] = val;
952 ff_tlog(s->avctx, "fmx=%d\n", val);
953 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
954 s->last_mv[i][j][1] >> 1);
955 s->last_mv[i][j][1] = 2 * val;
956 s->mv[i][j][1] = val;
957 ff_tlog(s->avctx, "fmy=%d\n", val);
962 av_assert0(!s->progressive_sequence);
963 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
964 for (i = 0; i < 2; i++) {
965 if (USES_LIST(mb_type, i)) {
966 s->field_select[i][0] = get_bits1(&s->gb);
967 for (k = 0; k < 2; k++) {
968 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
969 s->last_mv[i][0][k]);
970 s->last_mv[i][0][k] = val;
971 s->last_mv[i][1][k] = val;
972 s->mv[i][0][k] = val;
979 if (s->progressive_sequence){
980 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
981 return AVERROR_INVALIDDATA;
983 s->mv_type = MV_TYPE_DMV;
984 for (i = 0; i < 2; i++) {
985 if (USES_LIST(mb_type, i)) {
986 int dmx, dmy, mx, my, m;
987 const int my_shift = s->picture_structure == PICT_FRAME;
989 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
990 s->last_mv[i][0][0]);
991 s->last_mv[i][0][0] = mx;
992 s->last_mv[i][1][0] = mx;
994 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
995 s->last_mv[i][0][1] >> my_shift);
999 s->last_mv[i][0][1] = my << my_shift;
1000 s->last_mv[i][1][1] = my << my_shift;
1002 s->mv[i][0][0] = mx;
1003 s->mv[i][0][1] = my;
1004 s->mv[i][1][0] = mx; // not used
1005 s->mv[i][1][1] = my; // not used
1007 if (s->picture_structure == PICT_FRAME) {
1008 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1010 // m = 1 + 2 * s->top_field_first;
1011 m = s->top_field_first ? 1 : 3;
1013 /* top -> top pred */
1014 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1015 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1017 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1018 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1020 mb_type |= MB_TYPE_16x16;
1022 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1023 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1024 if (s->picture_structure == PICT_TOP_FIELD)
1033 av_log(s->avctx, AV_LOG_ERROR,
1034 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1035 return AVERROR_INVALIDDATA;
1040 if (HAS_CBP(mb_type)) {
1041 s->bdsp.clear_blocks(s->block[0]);
1043 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1044 if (mb_block_count > 6) {
1045 cbp <<= mb_block_count - 6;
1046 cbp |= get_bits(&s->gb, mb_block_count - 6);
1047 s->bdsp.clear_blocks(s->block[6]);
1050 av_log(s->avctx, AV_LOG_ERROR,
1051 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1052 return AVERROR_INVALIDDATA;
1055 // if 1, we memcpy blocks in xvmcvideo
1056 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1057 ff_xvmc_pack_pblocks(s, cbp);
1059 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1060 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1061 for (i = 0; i < 6; i++) {
1063 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1065 s->block_last_index[i] = -1;
1069 cbp <<= 12 - mb_block_count;
1071 for (i = 0; i < mb_block_count; i++) {
1072 if (cbp & (1 << 11)) {
1073 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1076 s->block_last_index[i] = -1;
1082 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1083 for (i = 0; i < 6; i++) {
1085 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1087 s->block_last_index[i] = -1;
1091 for (i = 0; i < 6; i++) {
1093 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1096 s->block_last_index[i] = -1;
1103 for (i = 0; i < 12; i++)
1104 s->block_last_index[i] = -1;
1108 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1113 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1115 Mpeg1Context *s = avctx->priv_data;
1116 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1118 ff_mpv_decode_defaults(s2);
1120 if ( avctx->codec_tag != AV_RL32("VCR2")
1121 && avctx->codec_tag != AV_RL32("BW10"))
1122 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1123 ff_mpv_decode_init(s2, avctx);
1125 s->mpeg_enc_ctx.avctx = avctx;
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();
1133 s2->chroma_format = 1;
1134 s->mpeg_enc_ctx_allocated = 0;
1135 s->mpeg_enc_ctx.picture_number = 0;
1136 s->repeat_field = 0;
1137 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1138 avctx->color_range = AVCOL_RANGE_MPEG;
1143 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1144 const AVCodecContext *avctx_from)
1146 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1147 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1150 if (avctx == avctx_from ||
1151 !ctx_from->mpeg_enc_ctx_allocated ||
1152 !s1->context_initialized)
1155 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1159 if (!ctx->mpeg_enc_ctx_allocated)
1160 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1162 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1163 s->picture_number++;
1169 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1170 const uint8_t *new_perm)
1172 uint16_t temp_matrix[64];
1175 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1177 for (i = 0; i < 64; i++)
1178 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1181 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1182 #if CONFIG_MPEG1_XVMC_HWACCEL
1185 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
1186 AV_PIX_FMT_VDPAU_MPEG1,
1188 #if CONFIG_MPEG1_VDPAU_HWACCEL
1195 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1196 #if CONFIG_MPEG2_XVMC_HWACCEL
1199 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
1200 AV_PIX_FMT_VDPAU_MPEG2,
1202 #if CONFIG_MPEG2_VDPAU_HWACCEL
1205 #if CONFIG_MPEG2_DXVA2_HWACCEL
1206 AV_PIX_FMT_DXVA2_VLD,
1208 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1209 AV_PIX_FMT_D3D11VA_VLD,
1211 #if CONFIG_MPEG2_VAAPI_HWACCEL
1214 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1215 AV_PIX_FMT_VIDEOTOOLBOX,
1221 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1226 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1232 static inline int uses_vdpau(AVCodecContext *avctx) {
1233 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1237 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1239 Mpeg1Context *s1 = avctx->priv_data;
1240 MpegEncContext *s = &s1->mpeg_enc_ctx;
1241 const enum AVPixelFormat *pix_fmts;
1243 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1244 return AV_PIX_FMT_GRAY8;
1246 if (s->chroma_format < 2)
1247 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1248 mpeg1_hwaccel_pixfmt_list_420 :
1249 mpeg2_hwaccel_pixfmt_list_420;
1250 else if (s->chroma_format == 2)
1251 pix_fmts = mpeg12_pixfmt_list_422;
1253 pix_fmts = mpeg12_pixfmt_list_444;
1255 return ff_thread_get_format(avctx, pix_fmts);
1258 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1260 // until then pix_fmt may be changed right after codec init
1263 || uses_vdpau(avctx)
1266 if (avctx->idct_algo == FF_IDCT_AUTO)
1267 avctx->idct_algo = FF_IDCT_SIMPLE;
1269 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1270 Mpeg1Context *s1 = avctx->priv_data;
1271 MpegEncContext *s = &s1->mpeg_enc_ctx;
1273 s->pack_pblocks = 1;
1275 FF_DISABLE_DEPRECATION_WARNINGS
1276 avctx->xvmc_acceleration = 2;
1277 FF_ENABLE_DEPRECATION_WARNINGS
1278 #endif /* FF_API_XVMC */
1282 /* Call this function when we know all parameters.
1283 * It may be called in different places for MPEG-1 and MPEG-2. */
1284 static int mpeg_decode_postinit(AVCodecContext *avctx)
1286 Mpeg1Context *s1 = avctx->priv_data;
1287 MpegEncContext *s = &s1->mpeg_enc_ctx;
1288 uint8_t old_permutation[64];
1291 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1293 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1296 if (s->aspect_ratio_info > 1) {
1298 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1299 (AVRational) { s1->pan_scan.width,
1300 s1->pan_scan.height }),
1301 (AVRational) { s->width, s->height });
1303 /* We ignore the spec here and guess a bit as reality does not
1304 * match the spec, see for example res_change_ffmpeg_aspect.ts
1305 * and sequence-display-aspect.mpg.
1306 * issue1613, 621, 562 */
1307 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1308 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1309 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1310 s->avctx->sample_aspect_ratio =
1311 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1312 (AVRational) { s->width, s->height });
1314 s->avctx->sample_aspect_ratio =
1315 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1316 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1317 // issue1613 4/3 16/9 -> 16/9
1318 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1319 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1320 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1321 ff_dlog(avctx, "aspect A %d/%d\n",
1322 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1323 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1324 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1325 s->avctx->sample_aspect_ratio.den);
1328 s->avctx->sample_aspect_ratio =
1329 ff_mpeg2_aspect[s->aspect_ratio_info];
1333 if (av_image_check_sar(s->width, s->height,
1334 avctx->sample_aspect_ratio) < 0) {
1335 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1336 avctx->sample_aspect_ratio.num,
1337 avctx->sample_aspect_ratio.den);
1338 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1341 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1342 avctx->coded_width != s->width ||
1343 avctx->coded_height != s->height ||
1344 s1->save_width != s->width ||
1345 s1->save_height != s->height ||
1346 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1347 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1349 if (s1->mpeg_enc_ctx_allocated) {
1350 ParseContext pc = s->parse_context;
1351 s->parse_context.buffer = 0;
1352 ff_mpv_common_end(s);
1353 s->parse_context = pc;
1354 s1->mpeg_enc_ctx_allocated = 0;
1357 ret = ff_set_dimensions(avctx, s->width, s->height);
1361 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1362 avctx->rc_max_rate = s->bit_rate;
1363 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1364 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1365 avctx->bit_rate = s->bit_rate;
1367 s1->save_aspect = s->avctx->sample_aspect_ratio;
1368 s1->save_width = s->width;
1369 s1->save_height = s->height;
1370 s1->save_progressive_seq = s->progressive_sequence;
1372 /* low_delay may be forced, in this case we will have B-frames
1373 * that behave like P-frames. */
1374 avctx->has_b_frames = !s->low_delay;
1376 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1378 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1379 avctx->ticks_per_frame = 1;
1381 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1384 av_reduce(&s->avctx->framerate.num,
1385 &s->avctx->framerate.den,
1386 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1387 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1389 avctx->ticks_per_frame = 2;
1391 switch (s->chroma_format) {
1392 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1394 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1395 default: av_assert0(0);
1399 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1400 setup_hwaccel_for_pixfmt(avctx);
1402 /* Quantization matrices may need reordering
1403 * if DCT permutation is changed. */
1404 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1406 ff_mpv_idct_init(s);
1407 if ((ret = ff_mpv_common_init(s)) < 0)
1410 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1411 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1412 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1413 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1415 s1->mpeg_enc_ctx_allocated = 1;
1420 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1423 Mpeg1Context *s1 = avctx->priv_data;
1424 MpegEncContext *s = &s1->mpeg_enc_ctx;
1425 int ref, f_code, vbv_delay;
1427 init_get_bits(&s->gb, buf, buf_size * 8);
1429 ref = get_bits(&s->gb, 10); /* temporal ref */
1430 s->pict_type = get_bits(&s->gb, 3);
1431 if (s->pict_type == 0 || s->pict_type > 3)
1432 return AVERROR_INVALIDDATA;
1434 vbv_delay = get_bits(&s->gb, 16);
1435 s->vbv_delay = vbv_delay;
1436 if (s->pict_type == AV_PICTURE_TYPE_P ||
1437 s->pict_type == AV_PICTURE_TYPE_B) {
1438 s->full_pel[0] = get_bits1(&s->gb);
1439 f_code = get_bits(&s->gb, 3);
1440 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1441 return AVERROR_INVALIDDATA;
1443 s->mpeg_f_code[0][0] = f_code;
1444 s->mpeg_f_code[0][1] = f_code;
1446 if (s->pict_type == AV_PICTURE_TYPE_B) {
1447 s->full_pel[1] = get_bits1(&s->gb);
1448 f_code = get_bits(&s->gb, 3);
1449 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1450 return AVERROR_INVALIDDATA;
1452 s->mpeg_f_code[1][0] = f_code;
1453 s->mpeg_f_code[1][1] = f_code;
1455 s->current_picture.f->pict_type = s->pict_type;
1456 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1458 if (avctx->debug & FF_DEBUG_PICT_INFO)
1459 av_log(avctx, AV_LOG_DEBUG,
1460 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1467 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1469 MpegEncContext *s = &s1->mpeg_enc_ctx;
1470 int horiz_size_ext, vert_size_ext;
1473 skip_bits(&s->gb, 1); /* profile and level esc*/
1474 s->avctx->profile = get_bits(&s->gb, 3);
1475 s->avctx->level = get_bits(&s->gb, 4);
1476 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1477 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1479 if (!s->chroma_format) {
1480 s->chroma_format = 1;
1481 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1484 horiz_size_ext = get_bits(&s->gb, 2);
1485 vert_size_ext = get_bits(&s->gb, 2);
1486 s->width |= (horiz_size_ext << 12);
1487 s->height |= (vert_size_ext << 12);
1488 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1489 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1490 check_marker(&s->gb, "after bit rate extension");
1491 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1493 s->low_delay = get_bits1(&s->gb);
1494 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1497 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1498 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1500 ff_dlog(s->avctx, "sequence extension\n");
1501 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1503 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1504 av_log(s->avctx, AV_LOG_DEBUG,
1505 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1506 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1507 s->avctx->rc_buffer_size, s->bit_rate);
1510 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1512 MpegEncContext *s = &s1->mpeg_enc_ctx;
1513 int color_description, w, h;
1515 skip_bits(&s->gb, 3); /* video format */
1516 color_description = get_bits1(&s->gb);
1517 if (color_description) {
1518 s->avctx->color_primaries = get_bits(&s->gb, 8);
1519 s->avctx->color_trc = get_bits(&s->gb, 8);
1520 s->avctx->colorspace = get_bits(&s->gb, 8);
1522 w = get_bits(&s->gb, 14);
1523 skip_bits(&s->gb, 1); // marker
1524 h = get_bits(&s->gb, 14);
1525 // remaining 3 bits are zero padding
1527 s1->pan_scan.width = 16 * w;
1528 s1->pan_scan.height = 16 * h;
1530 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1531 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1534 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1536 MpegEncContext *s = &s1->mpeg_enc_ctx;
1540 if (s->progressive_sequence) {
1541 if (s->repeat_first_field) {
1543 if (s->top_field_first)
1547 if (s->picture_structure == PICT_FRAME) {
1549 if (s->repeat_first_field)
1553 for (i = 0; i < nofco; i++) {
1554 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1555 skip_bits(&s->gb, 1); // marker
1556 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1557 skip_bits(&s->gb, 1); // marker
1560 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1561 av_log(s->avctx, AV_LOG_DEBUG,
1562 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1563 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1564 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1565 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1568 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1569 uint16_t matrix1[64], int intra)
1573 for (i = 0; i < 64; i++) {
1574 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1575 int v = get_bits(&s->gb, 8);
1577 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1578 return AVERROR_INVALIDDATA;
1580 if (intra && i == 0 && v != 8) {
1581 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1582 v = 8; // needed by pink.mpg / issue1046
1591 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1593 ff_dlog(s->avctx, "matrix extension\n");
1595 if (get_bits1(&s->gb))
1596 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1597 if (get_bits1(&s->gb))
1598 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1599 if (get_bits1(&s->gb))
1600 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1601 if (get_bits1(&s->gb))
1602 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1605 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1607 MpegEncContext *s = &s1->mpeg_enc_ctx;
1609 s->full_pel[0] = s->full_pel[1] = 0;
1610 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1611 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1612 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1613 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1614 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1615 av_log(s->avctx, AV_LOG_ERROR,
1616 "Missing picture start code, guessing missing values\n");
1617 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1618 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1619 s->pict_type = AV_PICTURE_TYPE_I;
1621 s->pict_type = AV_PICTURE_TYPE_P;
1623 s->pict_type = AV_PICTURE_TYPE_B;
1624 s->current_picture.f->pict_type = s->pict_type;
1625 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1627 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1628 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1629 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1630 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1632 s->intra_dc_precision = get_bits(&s->gb, 2);
1633 s->picture_structure = get_bits(&s->gb, 2);
1634 s->top_field_first = get_bits1(&s->gb);
1635 s->frame_pred_frame_dct = get_bits1(&s->gb);
1636 s->concealment_motion_vectors = get_bits1(&s->gb);
1637 s->q_scale_type = get_bits1(&s->gb);
1638 s->intra_vlc_format = get_bits1(&s->gb);
1639 s->alternate_scan = get_bits1(&s->gb);
1640 s->repeat_first_field = get_bits1(&s->gb);
1641 s->chroma_420_type = get_bits1(&s->gb);
1642 s->progressive_frame = get_bits1(&s->gb);
1644 if (s->alternate_scan) {
1645 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1646 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1648 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1649 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1652 /* composite display not parsed */
1653 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1654 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1655 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1656 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1657 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1658 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1659 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1660 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1661 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1664 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1666 AVCodecContext *avctx = s->avctx;
1667 Mpeg1Context *s1 = (Mpeg1Context *) s;
1670 /* start frame decoding */
1671 if (s->first_field || s->picture_structure == PICT_FRAME) {
1672 AVFrameSideData *pan_scan;
1674 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1677 ff_mpeg_er_frame_start(s);
1679 /* first check if we must repeat the frame */
1680 s->current_picture_ptr->f->repeat_pict = 0;
1681 if (s->repeat_first_field) {
1682 if (s->progressive_sequence) {
1683 if (s->top_field_first)
1684 s->current_picture_ptr->f->repeat_pict = 4;
1686 s->current_picture_ptr->f->repeat_pict = 2;
1687 } else if (s->progressive_frame) {
1688 s->current_picture_ptr->f->repeat_pict = 1;
1692 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1693 AV_FRAME_DATA_PANSCAN,
1694 sizeof(s1->pan_scan));
1696 return AVERROR(ENOMEM);
1697 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1699 if (s1->a53_caption) {
1700 AVFrameSideData *sd = av_frame_new_side_data(
1701 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1702 s1->a53_caption_size);
1704 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1705 av_freep(&s1->a53_caption);
1706 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
1709 if (s1->has_stereo3d) {
1710 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1712 return AVERROR(ENOMEM);
1714 *stereo = s1->stereo3d;
1715 s1->has_stereo3d = 0;
1719 AVFrameSideData *sd =
1720 av_frame_new_side_data(s->current_picture_ptr->f,
1721 AV_FRAME_DATA_AFD, 1);
1723 return AVERROR(ENOMEM);
1725 *sd->data = s1->afd;
1729 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1730 ff_thread_finish_setup(avctx);
1731 } else { // second field
1734 if (!s->current_picture_ptr) {
1735 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1736 return AVERROR_INVALIDDATA;
1739 if (s->avctx->hwaccel &&
1740 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1741 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1742 av_log(avctx, AV_LOG_ERROR,
1743 "hardware accelerator failed to decode first field\n");
1748 for (i = 0; i < 4; i++) {
1749 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1750 if (s->picture_structure == PICT_BOTTOM_FIELD)
1751 s->current_picture.f->data[i] +=
1752 s->current_picture_ptr->f->linesize[i];
1756 if (avctx->hwaccel) {
1757 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1764 #define DECODE_SLICE_ERROR -1
1765 #define DECODE_SLICE_OK 0
1769 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1770 * @return DECODE_SLICE_ERROR if the slice is damaged,
1771 * DECODE_SLICE_OK if this slice is OK
1773 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1774 const uint8_t **buf, int buf_size)
1776 AVCodecContext *avctx = s->avctx;
1777 const int lowres = s->avctx->lowres;
1778 const int field_pic = s->picture_structure != PICT_FRAME;
1782 s->resync_mb_y = -1;
1784 av_assert0(mb_y < s->mb_height);
1786 init_get_bits(&s->gb, *buf, buf_size * 8);
1787 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1788 skip_bits(&s->gb, 3);
1790 ff_mpeg1_clean_buffers(s);
1791 s->interlaced_dct = 0;
1793 s->qscale = get_qscale(s);
1795 if (s->qscale == 0) {
1796 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1797 return AVERROR_INVALIDDATA;
1800 /* extra slice info */
1801 if (skip_1stop_8data_bits(&s->gb) < 0)
1802 return AVERROR_INVALIDDATA;
1806 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1809 while (get_bits_left(&s->gb) > 0) {
1810 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1811 MBINCR_VLC_BITS, 2);
1813 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1814 return AVERROR_INVALIDDATA;
1819 /* otherwise, stuffing, nothing to do */
1827 if (s->mb_x >= (unsigned) s->mb_width) {
1828 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1829 return AVERROR_INVALIDDATA;
1832 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1833 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1834 int start_code = -1;
1835 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1836 if (buf_end < *buf + buf_size)
1839 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1840 return DECODE_SLICE_ERROR;
1842 return DECODE_SLICE_OK;
1845 s->resync_mb_x = s->mb_x;
1846 s->resync_mb_y = s->mb_y = mb_y;
1848 ff_init_block_index(s);
1850 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1851 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1852 av_log(s->avctx, AV_LOG_DEBUG,
1853 "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",
1855 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1856 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1857 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1858 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1859 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1860 s->progressive_sequence ? "ps" : "",
1861 s->progressive_frame ? "pf" : "",
1862 s->alternate_scan ? "alt" : "",
1863 s->top_field_first ? "top" : "",
1864 s->intra_dc_precision, s->picture_structure,
1865 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1866 s->q_scale_type, s->intra_vlc_format,
1867 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1872 // If 1, we memcpy blocks in xvmcvideo.
1873 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1874 ff_xvmc_init_block(s); // set s->block
1876 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1879 // Note motion_val is normally NULL unless we want to extract the MVs.
1880 if (s->current_picture.motion_val[0] && !s->encoding) {
1881 const int wrap = s->b8_stride;
1882 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1883 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1884 int motion_x, motion_y, dir, i;
1886 for (i = 0; i < 2; i++) {
1887 for (dir = 0; dir < 2; dir++) {
1889 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1890 motion_x = motion_y = 0;
1891 } else if (s->mv_type == MV_TYPE_16X16 ||
1892 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1893 motion_x = s->mv[dir][0][0];
1894 motion_y = s->mv[dir][0][1];
1895 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1896 motion_x = s->mv[dir][i][0];
1897 motion_y = s->mv[dir][i][1];
1900 s->current_picture.motion_val[dir][xy][0] = motion_x;
1901 s->current_picture.motion_val[dir][xy][1] = motion_y;
1902 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1903 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1904 s->current_picture.ref_index [dir][b8_xy] =
1905 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1906 av_assert2(s->field_select[dir][i] == 0 ||
1907 s->field_select[dir][i] == 1);
1914 s->dest[0] += 16 >> lowres;
1915 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1916 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1918 ff_mpv_decode_mb(s, s->block);
1920 if (++s->mb_x >= s->mb_width) {
1921 const int mb_size = 16 >> s->avctx->lowres;
1923 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1924 ff_mpv_report_decode_progress(s);
1927 s->mb_y += 1 << field_pic;
1929 if (s->mb_y >= s->mb_height) {
1930 int left = get_bits_left(&s->gb);
1931 int is_d10 = s->chroma_format == 2 &&
1932 s->pict_type == AV_PICTURE_TYPE_I &&
1933 avctx->profile == 0 && avctx->level == 5 &&
1934 s->intra_dc_precision == 2 &&
1935 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1936 s->progressive_frame == 0
1937 /* vbv_delay == 0xBBB || 0xE10 */;
1939 if (left >= 32 && !is_d10) {
1940 GetBitContext gb = s->gb;
1941 align_get_bits(&gb);
1942 if (show_bits(&gb, 24) == 0x060E2B) {
1943 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1949 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1950 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1951 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1952 left, show_bits(&s->gb, FFMIN(left, 23)));
1953 return AVERROR_INVALIDDATA;
1957 // There are some files out there which are missing the last slice
1958 // in cases where the slice is completely outside the visible
1959 // area, we detect this here instead of running into the end expecting
1961 if (s->mb_y >= ((s->height + 15) >> 4) &&
1962 !s->progressive_sequence &&
1963 get_bits_left(&s->gb) <= 8 &&
1964 get_bits_left(&s->gb) >= 0 &&
1965 s->mb_skip_run == -1 &&
1966 show_bits(&s->gb, 8) == 0)
1969 ff_init_block_index(s);
1972 /* skip mb handling */
1973 if (s->mb_skip_run == -1) {
1974 /* read increment again */
1977 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1978 MBINCR_VLC_BITS, 2);
1980 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1981 return AVERROR_INVALIDDATA;
1985 s->mb_skip_run += 33;
1986 } else if (code == 35) {
1987 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1988 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1989 return AVERROR_INVALIDDATA;
1991 goto eos; /* end of slice */
1993 /* otherwise, stuffing, nothing to do */
1995 s->mb_skip_run += code;
1999 if (s->mb_skip_run) {
2001 if (s->pict_type == AV_PICTURE_TYPE_I) {
2002 av_log(s->avctx, AV_LOG_ERROR,
2003 "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
2004 return AVERROR_INVALIDDATA;
2009 for (i = 0; i < 12; i++)
2010 s->block_last_index[i] = -1;
2011 if (s->picture_structure == PICT_FRAME)
2012 s->mv_type = MV_TYPE_16X16;
2014 s->mv_type = MV_TYPE_FIELD;
2015 if (s->pict_type == AV_PICTURE_TYPE_P) {
2016 /* if P type, zero motion vector is implied */
2017 s->mv_dir = MV_DIR_FORWARD;
2018 s->mv[0][0][0] = s->mv[0][0][1] = 0;
2019 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
2020 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
2021 s->field_select[0][0] = (s->picture_structure - 1) & 1;
2023 /* if B type, reuse previous vectors and directions */
2024 s->mv[0][0][0] = s->last_mv[0][0][0];
2025 s->mv[0][0][1] = s->last_mv[0][0][1];
2026 s->mv[1][0][0] = s->last_mv[1][0][0];
2027 s->mv[1][0][1] = s->last_mv[1][0][1];
2032 eos: // end of slice
2033 if (get_bits_left(&s->gb) < 0) {
2034 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
2035 return AVERROR_INVALIDDATA;
2037 *buf += (get_bits_count(&s->gb) - 1) / 8;
2038 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);
2042 static int slice_decode_thread(AVCodecContext *c, void *arg)
2044 MpegEncContext *s = *(void **) arg;
2045 const uint8_t *buf = s->gb.buffer;
2046 int mb_y = s->start_mb_y;
2047 const int field_pic = s->picture_structure != PICT_FRAME;
2049 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2052 uint32_t start_code;
2055 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2057 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2058 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2059 s->start_mb_y, s->end_mb_y, s->er.error_count);
2061 if (c->err_recognition & AV_EF_EXPLODE)
2063 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2064 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2066 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2068 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2069 s->mb_x - 1, s->mb_y,
2070 ER_AC_END | ER_DC_END | ER_MV_END);
2073 if (s->mb_y == s->end_mb_y)
2077 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2078 mb_y = start_code - SLICE_MIN_START_CODE;
2079 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2080 mb_y += (*buf&0xE0)<<2;
2082 if (s->picture_structure == PICT_BOTTOM_FIELD)
2084 if (mb_y < 0 || mb_y >= s->end_mb_y)
2085 return AVERROR_INVALIDDATA;
2090 * Handle slice ends.
2091 * @return 1 if it seems to be the last slice
2093 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2095 Mpeg1Context *s1 = avctx->priv_data;
2096 MpegEncContext *s = &s1->mpeg_enc_ctx;
2098 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2101 if (s->avctx->hwaccel) {
2102 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2104 av_log(avctx, AV_LOG_ERROR,
2105 "hardware accelerator failed to decode picture\n");
2110 /* end of slice reached */
2111 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2114 ff_er_frame_end(&s->er);
2116 ff_mpv_frame_end(s);
2118 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2119 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2122 ff_print_debug_info(s, s->current_picture_ptr, pict);
2123 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2125 if (avctx->active_thread_type & FF_THREAD_FRAME)
2126 s->picture_number++;
2127 /* latency of 1 frame for I- and P-frames */
2128 /* XXX: use another variable than picture_number */
2129 if (s->last_picture_ptr) {
2130 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2133 ff_print_debug_info(s, s->last_picture_ptr, pict);
2134 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2144 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2145 const uint8_t *buf, int buf_size)
2147 Mpeg1Context *s1 = avctx->priv_data;
2148 MpegEncContext *s = &s1->mpeg_enc_ctx;
2152 init_get_bits(&s->gb, buf, buf_size * 8);
2154 width = get_bits(&s->gb, 12);
2155 height = get_bits(&s->gb, 12);
2156 if (width == 0 || height == 0) {
2157 av_log(avctx, AV_LOG_WARNING,
2158 "Invalid horizontal or vertical size value.\n");
2159 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2160 return AVERROR_INVALIDDATA;
2162 s->aspect_ratio_info = get_bits(&s->gb, 4);
2163 if (s->aspect_ratio_info == 0) {
2164 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2165 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2166 return AVERROR_INVALIDDATA;
2168 s->frame_rate_index = get_bits(&s->gb, 4);
2169 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2170 av_log(avctx, AV_LOG_WARNING,
2171 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2172 s->frame_rate_index = 1;
2174 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2175 if (check_marker(&s->gb, "in sequence header") == 0) {
2176 return AVERROR_INVALIDDATA;
2179 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2180 skip_bits(&s->gb, 1);
2183 if (get_bits1(&s->gb)) {
2184 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2186 for (i = 0; i < 64; i++) {
2187 j = s->idsp.idct_permutation[i];
2188 v = ff_mpeg1_default_intra_matrix[i];
2189 s->intra_matrix[j] = v;
2190 s->chroma_intra_matrix[j] = v;
2193 if (get_bits1(&s->gb)) {
2194 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2196 for (i = 0; i < 64; i++) {
2197 int j = s->idsp.idct_permutation[i];
2198 v = ff_mpeg1_default_non_intra_matrix[i];
2199 s->inter_matrix[j] = v;
2200 s->chroma_inter_matrix[j] = v;
2204 if (show_bits(&s->gb, 23) != 0) {
2205 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2206 return AVERROR_INVALIDDATA;
2212 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2213 s->progressive_sequence = 1;
2214 s->progressive_frame = 1;
2215 s->picture_structure = PICT_FRAME;
2217 s->frame_pred_frame_dct = 1;
2218 s->chroma_format = 1;
2220 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2221 s->out_format = FMT_MPEG1;
2222 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2223 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2226 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2227 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2228 s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2233 static int vcr2_init_sequence(AVCodecContext *avctx)
2235 Mpeg1Context *s1 = avctx->priv_data;
2236 MpegEncContext *s = &s1->mpeg_enc_ctx;
2239 /* start new MPEG-1 context decoding */
2240 s->out_format = FMT_MPEG1;
2241 if (s1->mpeg_enc_ctx_allocated) {
2242 ff_mpv_common_end(s);
2243 s1->mpeg_enc_ctx_allocated = 0;
2245 s->width = avctx->coded_width;
2246 s->height = avctx->coded_height;
2247 avctx->has_b_frames = 0; // true?
2250 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2251 setup_hwaccel_for_pixfmt(avctx);
2253 ff_mpv_idct_init(s);
2254 if ((ret = ff_mpv_common_init(s)) < 0)
2256 s1->mpeg_enc_ctx_allocated = 1;
2258 for (i = 0; i < 64; i++) {
2259 int j = s->idsp.idct_permutation[i];
2260 v = ff_mpeg1_default_intra_matrix[i];
2261 s->intra_matrix[j] = v;
2262 s->chroma_intra_matrix[j] = v;
2264 v = ff_mpeg1_default_non_intra_matrix[i];
2265 s->inter_matrix[j] = v;
2266 s->chroma_inter_matrix[j] = v;
2269 s->progressive_sequence = 1;
2270 s->progressive_frame = 1;
2271 s->picture_structure = PICT_FRAME;
2273 s->frame_pred_frame_dct = 1;
2274 s->chroma_format = 1;
2275 if (s->codec_tag == AV_RL32("BW10")) {
2276 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2278 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2279 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2281 s1->save_width = s->width;
2282 s1->save_height = s->height;
2283 s1->save_progressive_seq = s->progressive_sequence;
2287 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2288 const uint8_t *p, int buf_size)
2290 Mpeg1Context *s1 = avctx->priv_data;
2292 if (buf_size >= 6 &&
2293 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2294 p[4] == 3 && (p[5] & 0x40)) {
2295 /* extract A53 Part 4 CC data */
2296 int cc_count = p[5] & 0x1f;
2297 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2298 av_freep(&s1->a53_caption);
2299 s1->a53_caption_size = cc_count * 3;
2300 s1->a53_caption = av_malloc(s1->a53_caption_size);
2301 if (s1->a53_caption)
2302 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2305 } else if (buf_size >= 11 &&
2306 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2307 /* extract DVD CC data */
2310 // There is a caption count field in the data, but it is often
2311 // incorect. So count the number of captions present.
2312 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2314 // Transform the DVD format into A53 Part 4 format
2316 av_freep(&s1->a53_caption);
2317 s1->a53_caption_size = cc_count * 6;
2318 s1->a53_caption = av_malloc(s1->a53_caption_size);
2319 if (s1->a53_caption) {
2320 uint8_t field1 = !!(p[4] & 0x80);
2321 uint8_t *cap = s1->a53_caption;
2323 for (i = 0; i < cc_count; i++) {
2324 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2327 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2340 static void mpeg_decode_user_data(AVCodecContext *avctx,
2341 const uint8_t *p, int buf_size)
2343 Mpeg1Context *s = avctx->priv_data;
2344 const uint8_t *buf_end = p + buf_size;
2345 Mpeg1Context *s1 = avctx->priv_data;
2349 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2350 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2352 av_log(avctx, AV_LOG_ERROR, "\n");
2358 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2362 /* we parse the DTG active format information */
2363 if (buf_end - p >= 5 &&
2364 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2372 if (buf_end - p < 1)
2375 FF_DISABLE_DEPRECATION_WARNINGS
2376 avctx->dtg_active_format = p[0] & 0x0f;
2377 FF_ENABLE_DEPRECATION_WARNINGS
2378 #endif /* FF_API_AFD */
2380 s1->afd = p[0] & 0x0f;
2382 } else if (buf_end - p >= 6 &&
2383 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2384 p[4] == 0x03) { // S3D_video_format_length
2385 // the 0x7F mask ignores the reserved_bit value
2386 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2388 if (S3D_video_format_type == 0x03 ||
2389 S3D_video_format_type == 0x04 ||
2390 S3D_video_format_type == 0x08 ||
2391 S3D_video_format_type == 0x23) {
2393 s1->has_stereo3d = 1;
2395 switch (S3D_video_format_type) {
2397 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2400 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2403 s1->stereo3d.type = AV_STEREO3D_2D;
2406 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2410 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2415 static void mpeg_decode_gop(AVCodecContext *avctx,
2416 const uint8_t *buf, int buf_size)
2418 Mpeg1Context *s1 = avctx->priv_data;
2419 MpegEncContext *s = &s1->mpeg_enc_ctx;
2423 init_get_bits(&s->gb, buf, buf_size * 8);
2425 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2427 s->closed_gop = get_bits1(&s->gb);
2428 /* broken_link indicate that after editing the
2429 * reference frames of the first B-Frames after GOP I-Frame
2430 * are missing (open gop) */
2431 broken_link = get_bits1(&s->gb);
2433 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2434 char tcbuf[AV_TIMECODE_STR_SIZE];
2435 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2436 av_log(s->avctx, AV_LOG_DEBUG,
2437 "GOP (%s) closed_gop=%d broken_link=%d\n",
2438 tcbuf, s->closed_gop, broken_link);
2442 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2443 int *got_output, const uint8_t *buf, int buf_size)
2445 Mpeg1Context *s = avctx->priv_data;
2446 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2447 const uint8_t *buf_ptr = buf;
2448 const uint8_t *buf_end = buf + buf_size;
2449 int ret, input_size;
2450 int last_code = 0, skip_frame = 0;
2451 int picture_start_code_seen = 0;
2454 /* find next start code */
2455 uint32_t start_code = -1;
2456 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2457 if (start_code > 0x1ff) {
2460 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2463 av_assert0(avctx->thread_count > 1);
2465 avctx->execute(avctx, slice_decode_thread,
2466 &s2->thread_context[0], NULL,
2467 s->slice_count, sizeof(void *));
2468 for (i = 0; i < s->slice_count; i++)
2469 s2->er.error_count += s2->thread_context[i]->er.error_count;
2473 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2474 && uses_vdpau(avctx))
2475 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2478 ret = slice_end(avctx, picture);
2482 // FIXME: merge with the stuff in mpeg_decode_slice
2483 if (s2->last_picture_ptr || s2->low_delay)
2489 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2490 return AVERROR_INVALIDDATA;
2492 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2495 input_size = buf_end - buf_ptr;
2497 if (avctx->debug & FF_DEBUG_STARTCODE)
2498 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2499 start_code, buf_ptr - buf, input_size);
2501 /* prepare data for next start code */
2502 switch (start_code) {
2503 case SEQ_START_CODE:
2504 if (last_code == 0) {
2505 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2506 if (buf != avctx->extradata)
2509 av_log(avctx, AV_LOG_ERROR,
2510 "ignoring SEQ_START_CODE after %X\n", last_code);
2511 if (avctx->err_recognition & AV_EF_EXPLODE)
2512 return AVERROR_INVALIDDATA;
2516 case PICTURE_START_CODE:
2517 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2518 /* If it's a frame picture, there can't be more than one picture header.
2519 Yet, it does happen and we need to handle it. */
2520 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2523 picture_start_code_seen = 1;
2525 if (s2->width <= 0 || s2->height <= 0) {
2526 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2527 s2->width, s2->height);
2528 return AVERROR_INVALIDDATA;
2532 s2->intra_dc_precision= 3;
2533 s2->intra_matrix[0]= 1;
2535 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2536 !avctx->hwaccel && s->slice_count) {
2539 avctx->execute(avctx, slice_decode_thread,
2540 s2->thread_context, NULL,
2541 s->slice_count, sizeof(void *));
2542 for (i = 0; i < s->slice_count; i++)
2543 s2->er.error_count += s2->thread_context[i]->er.error_count;
2546 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2547 ret = mpeg_decode_postinit(avctx);
2549 av_log(avctx, AV_LOG_ERROR,
2550 "mpeg_decode_postinit() failure\n");
2554 /* We have a complete image: we try to decompress it. */
2555 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2558 last_code = PICTURE_START_CODE;
2560 av_log(avctx, AV_LOG_ERROR,
2561 "ignoring pic after %X\n", last_code);
2562 if (avctx->err_recognition & AV_EF_EXPLODE)
2563 return AVERROR_INVALIDDATA;
2566 case EXT_START_CODE:
2567 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2569 switch (get_bits(&s2->gb, 4)) {
2571 if (last_code == 0) {
2572 mpeg_decode_sequence_extension(s);
2574 av_log(avctx, AV_LOG_ERROR,
2575 "ignoring seq ext after %X\n", last_code);
2576 if (avctx->err_recognition & AV_EF_EXPLODE)
2577 return AVERROR_INVALIDDATA;
2581 mpeg_decode_sequence_display_extension(s);
2584 mpeg_decode_quant_matrix_extension(s2);
2587 mpeg_decode_picture_display_extension(s);
2590 if (last_code == PICTURE_START_CODE) {
2591 mpeg_decode_picture_coding_extension(s);
2593 av_log(avctx, AV_LOG_ERROR,
2594 "ignoring pic cod ext after %X\n", last_code);
2595 if (avctx->err_recognition & AV_EF_EXPLODE)
2596 return AVERROR_INVALIDDATA;
2601 case USER_START_CODE:
2602 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2604 case GOP_START_CODE:
2605 if (last_code == 0) {
2606 s2->first_field = 0;
2607 mpeg_decode_gop(avctx, buf_ptr, input_size);
2610 av_log(avctx, AV_LOG_ERROR,
2611 "ignoring GOP_START_CODE after %X\n", last_code);
2612 if (avctx->err_recognition & AV_EF_EXPLODE)
2613 return AVERROR_INVALIDDATA;
2617 if (start_code >= SLICE_MIN_START_CODE &&
2618 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2619 if (s2->progressive_sequence && !s2->progressive_frame) {
2620 s2->progressive_frame = 1;
2621 av_log(s2->avctx, AV_LOG_ERROR,
2622 "interlaced frame in progressive sequence, ignoring\n");
2625 if (s2->picture_structure == 0 ||
2626 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2627 av_log(s2->avctx, AV_LOG_ERROR,
2628 "picture_structure %d invalid, ignoring\n",
2629 s2->picture_structure);
2630 s2->picture_structure = PICT_FRAME;
2633 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2634 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2636 if (s2->picture_structure == PICT_FRAME) {
2637 s2->first_field = 0;
2638 s2->v_edge_pos = 16 * s2->mb_height;
2640 s2->first_field ^= 1;
2641 s2->v_edge_pos = 8 * s2->mb_height;
2642 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2645 if (start_code >= SLICE_MIN_START_CODE &&
2646 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2647 const int field_pic = s2->picture_structure != PICT_FRAME;
2648 int mb_y = start_code - SLICE_MIN_START_CODE;
2649 last_code = SLICE_MIN_START_CODE;
2650 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2651 mb_y += (*buf_ptr&0xE0)<<2;
2654 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2657 if (buf_end - buf_ptr < 2) {
2658 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2659 return AVERROR_INVALIDDATA;
2662 if (mb_y >= s2->mb_height) {
2663 av_log(s2->avctx, AV_LOG_ERROR,
2664 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2665 return AVERROR_INVALIDDATA;
2668 if (!s2->last_picture_ptr) {
2669 /* Skip B-frames if we do not have reference frames and
2670 * GOP is not closed. */
2671 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2672 if (!s2->closed_gop) {
2678 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2680 if (!s2->next_picture_ptr) {
2681 /* Skip P-frames if we do not have a reference frame or
2682 * we have an invalid header. */
2683 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2688 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2689 s2->pict_type == AV_PICTURE_TYPE_B) ||
2690 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2691 s2->pict_type != AV_PICTURE_TYPE_I) ||
2692 avctx->skip_frame >= AVDISCARD_ALL) {
2697 if (!s->mpeg_enc_ctx_allocated)
2700 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2701 if (mb_y < avctx->skip_top ||
2702 mb_y >= s2->mb_height - avctx->skip_bottom)
2706 if (!s2->pict_type) {
2707 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2708 if (avctx->err_recognition & AV_EF_EXPLODE)
2709 return AVERROR_INVALIDDATA;
2713 if (s->first_slice) {
2716 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2719 if (!s2->current_picture_ptr) {
2720 av_log(avctx, AV_LOG_ERROR,
2721 "current_picture not initialized\n");
2722 return AVERROR_INVALIDDATA;
2726 if (uses_vdpau(avctx)) {
2733 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2735 int threshold = (s2->mb_height * s->slice_count +
2736 s2->slice_context_count / 2) /
2737 s2->slice_context_count;
2738 av_assert0(avctx->thread_count > 1);
2739 if (threshold <= mb_y) {
2740 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2742 thread_context->start_mb_y = mb_y;
2743 thread_context->end_mb_y = s2->mb_height;
2744 if (s->slice_count) {
2745 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2746 ret = ff_update_duplicate_context(thread_context, s2);
2750 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2753 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2755 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2759 if (avctx->err_recognition & AV_EF_EXPLODE)
2761 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2762 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2763 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2764 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2766 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2767 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2768 ER_AC_END | ER_DC_END | ER_MV_END);
2777 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2778 int *got_output, AVPacket *avpkt)
2780 const uint8_t *buf = avpkt->data;
2782 int buf_size = avpkt->size;
2783 Mpeg1Context *s = avctx->priv_data;
2784 AVFrame *picture = data;
2785 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2787 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2788 /* special case for last picture */
2789 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2790 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2794 s2->next_picture_ptr = NULL;
2801 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2802 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2805 if (ff_combine_frame(&s2->parse_context, next,
2806 (const uint8_t **) &buf, &buf_size) < 0)
2810 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2811 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2812 || s2->codec_tag == AV_RL32("BW10")
2814 vcr2_init_sequence(avctx);
2818 if (avctx->extradata && !s->extradata_decoded) {
2819 ret = decode_chunks(avctx, picture, got_output,
2820 avctx->extradata, avctx->extradata_size);
2822 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2825 s->extradata_decoded = 1;
2826 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2827 s2->current_picture_ptr = NULL;
2832 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2833 if (ret<0 || *got_output)
2834 s2->current_picture_ptr = NULL;
2839 static void flush(AVCodecContext *avctx)
2841 Mpeg1Context *s = avctx->priv_data;
2845 ff_mpeg_flush(avctx);
2848 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2850 Mpeg1Context *s = avctx->priv_data;
2852 if (s->mpeg_enc_ctx_allocated)
2853 ff_mpv_common_end(&s->mpeg_enc_ctx);
2854 av_freep(&s->a53_caption);
2858 static const AVProfile mpeg2_video_profiles[] = {
2859 { FF_PROFILE_MPEG2_422, "4:2:2" },
2860 { FF_PROFILE_MPEG2_HIGH, "High" },
2861 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2862 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2863 { FF_PROFILE_MPEG2_MAIN, "Main" },
2864 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2865 { FF_PROFILE_RESERVED, "Reserved" },
2866 { FF_PROFILE_RESERVED, "Reserved" },
2867 { FF_PROFILE_UNKNOWN },
2870 AVCodec ff_mpeg1video_decoder = {
2871 .name = "mpeg1video",
2872 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2873 .type = AVMEDIA_TYPE_VIDEO,
2874 .id = AV_CODEC_ID_MPEG1VIDEO,
2875 .priv_data_size = sizeof(Mpeg1Context),
2876 .init = mpeg_decode_init,
2877 .close = mpeg_decode_end,
2878 .decode = mpeg_decode_frame,
2879 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2880 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2881 AV_CODEC_CAP_SLICE_THREADS,
2884 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2887 AVCodec ff_mpeg2video_decoder = {
2888 .name = "mpeg2video",
2889 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2890 .type = AVMEDIA_TYPE_VIDEO,
2891 .id = AV_CODEC_ID_MPEG2VIDEO,
2892 .priv_data_size = sizeof(Mpeg1Context),
2893 .init = mpeg_decode_init,
2894 .close = mpeg_decode_end,
2895 .decode = mpeg_decode_frame,
2896 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2897 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2898 AV_CODEC_CAP_SLICE_THREADS,
2901 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2905 AVCodec ff_mpegvideo_decoder = {
2906 .name = "mpegvideo",
2907 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2908 .type = AVMEDIA_TYPE_VIDEO,
2909 .id = AV_CODEC_ID_MPEG2VIDEO,
2910 .priv_data_size = sizeof(Mpeg1Context),
2911 .init = mpeg_decode_init,
2912 .close = mpeg_decode_end,
2913 .decode = mpeg_decode_frame,
2914 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2920 #if CONFIG_MPEG_XVMC_DECODER
2921 FF_DISABLE_DEPRECATION_WARNINGS
2922 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2924 if (avctx->active_thread_type & FF_THREAD_SLICE)
2926 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2928 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2929 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2931 mpeg_decode_init(avctx);
2933 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2934 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2939 AVCodec ff_mpeg_xvmc_decoder = {
2940 .name = "mpegvideo_xvmc",
2941 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2942 .type = AVMEDIA_TYPE_VIDEO,
2943 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2944 .priv_data_size = sizeof(Mpeg1Context),
2945 .init = mpeg_mc_decode_init,
2946 .close = mpeg_decode_end,
2947 .decode = mpeg_decode_frame,
2948 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2949 AV_CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL |
2953 FF_ENABLE_DEPRECATION_WARNINGS
2955 #endif /* FF_API_XVMC */
2957 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
2958 AVCodec ff_mpeg_vdpau_decoder = {
2959 .name = "mpegvideo_vdpau",
2960 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2961 .type = AVMEDIA_TYPE_VIDEO,
2962 .id = AV_CODEC_ID_MPEG2VIDEO,
2963 .priv_data_size = sizeof(Mpeg1Context),
2964 .init = mpeg_decode_init,
2965 .close = mpeg_decode_end,
2966 .decode = mpeg_decode_frame,
2967 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2968 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,
2973 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
2974 AVCodec ff_mpeg1_vdpau_decoder = {
2975 .name = "mpeg1video_vdpau",
2976 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2977 .type = AVMEDIA_TYPE_VIDEO,
2978 .id = AV_CODEC_ID_MPEG1VIDEO,
2979 .priv_data_size = sizeof(Mpeg1Context),
2980 .init = mpeg_decode_init,
2981 .close = mpeg_decode_end,
2982 .decode = mpeg_decode_frame,
2983 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2984 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,