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"
44 #include "mpeg12data.h"
45 #include "mpegutils.h"
46 #include "mpegvideo.h"
47 #include "mpegvideodata.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 */
60 AVBufferRef *a53_buf_ref;
64 AVRational save_aspect;
65 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 MAX_INDEX (64 - 1)
128 #define check_scantable_index(ctx, x) \
130 if ((x) > MAX_INDEX) { \
131 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
132 ctx->mb_x, ctx->mb_y); \
133 return AVERROR_INVALIDDATA; \
137 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
138 int16_t *block, int n)
140 int level, 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->inter_matrix;
144 const int qscale = s->qscale;
147 OPEN_READER(re, &s->gb);
149 // special case for first coefficient, no need to add second VLC table
150 UPDATE_CACHE(re, &s->gb);
151 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
152 level = (3 * qscale * quant_matrix[0]) >> 5;
153 level = (level - 1) | 1;
154 if (GET_CACHE(re, &s->gb) & 0x40000000)
158 SKIP_BITS(re, &s->gb, 2);
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],
172 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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);
197 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
198 level = (level - 1) | 1;
201 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
202 level = (level - 1) | 1;
207 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);
216 check_scantable_index(s, i);
218 s->block_last_index[n] = i;
223 * Changing this would eat up any speed benefits it has.
224 * Do not use "fast" flag if you need the code to be robust.
226 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
227 int16_t *block, int n)
229 int level, i, j, run;
230 RLTable *rl = &ff_rl_mpeg1;
231 uint8_t *const scantable = s->intra_scantable.permutated;
232 const int qscale = s->qscale;
235 OPEN_READER(re, &s->gb);
237 // Special case for first coefficient, no need to add second VLC table.
238 UPDATE_CACHE(re, &s->gb);
239 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
240 level = (3 * qscale) >> 1;
241 level = (level - 1) | 1;
242 if (GET_CACHE(re, &s->gb) & 0x40000000)
246 SKIP_BITS(re, &s->gb, 2);
247 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
251 /* now quantify & encode AC coefficients */
253 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
261 level = ((level * 2 + 1) * qscale) >> 1;
262 level = (level - 1) | 1;
263 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
264 SHOW_SBITS(re, &s->gb, 1);
265 SKIP_BITS(re, &s->gb, 1);
268 run = SHOW_UBITS(re, &s->gb, 6) + 1;
269 LAST_SKIP_BITS(re, &s->gb, 6);
270 UPDATE_CACHE(re, &s->gb);
271 level = SHOW_SBITS(re, &s->gb, 8);
272 SKIP_BITS(re, &s->gb, 8);
274 level = SHOW_UBITS(re, &s->gb, 8) - 256;
275 SKIP_BITS(re, &s->gb, 8);
276 } else if (level == 0) {
277 level = SHOW_UBITS(re, &s->gb, 8);
278 SKIP_BITS(re, &s->gb, 8);
286 level = ((level * 2 + 1) * qscale) >> 1;
287 level = (level - 1) | 1;
290 level = ((level * 2 + 1) * qscale) >> 1;
291 level = (level - 1) | 1;
296 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
298 UPDATE_CACHE(re, &s->gb);
301 LAST_SKIP_BITS(re, &s->gb, 2);
302 CLOSE_READER(re, &s->gb);
305 check_scantable_index(s, i);
307 s->block_last_index[n] = i;
311 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
312 int16_t *block, int n)
314 int level, i, j, run;
315 RLTable *rl = &ff_rl_mpeg1;
316 uint8_t *const scantable = s->intra_scantable.permutated;
317 const uint16_t *quant_matrix;
318 const int qscale = s->qscale;
324 OPEN_READER(re, &s->gb);
327 quant_matrix = s->inter_matrix;
329 quant_matrix = s->chroma_inter_matrix;
331 // Special case for first coefficient, no need to add second VLC table.
332 UPDATE_CACHE(re, &s->gb);
333 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
334 level = (3 * qscale * quant_matrix[0]) >> 5;
335 if (GET_CACHE(re, &s->gb) & 0x40000000)
340 SKIP_BITS(re, &s->gb, 2);
341 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
345 /* now quantify & encode AC coefficients */
347 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
355 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
356 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
357 SHOW_SBITS(re, &s->gb, 1);
358 SKIP_BITS(re, &s->gb, 1);
361 run = SHOW_UBITS(re, &s->gb, 6) + 1;
362 LAST_SKIP_BITS(re, &s->gb, 6);
363 UPDATE_CACHE(re, &s->gb);
364 level = SHOW_SBITS(re, &s->gb, 12);
365 SKIP_BITS(re, &s->gb, 12);
372 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
375 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
381 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
383 UPDATE_CACHE(re, &s->gb);
386 LAST_SKIP_BITS(re, &s->gb, 2);
387 CLOSE_READER(re, &s->gb);
389 block[63] ^= (mismatch & 1);
391 check_scantable_index(s, i);
393 s->block_last_index[n] = i;
398 * Changing this would eat up any speed benefits it has.
399 * Do not use "fast" flag if you need the code to be robust.
401 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
402 int16_t *block, int n)
404 int level, i, j, run;
405 RLTable *rl = &ff_rl_mpeg1;
406 uint8_t *const scantable = s->intra_scantable.permutated;
407 const int qscale = s->qscale;
408 OPEN_READER(re, &s->gb);
411 // special case for first coefficient, no need to add second VLC table
412 UPDATE_CACHE(re, &s->gb);
413 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
414 level = (3 * qscale) >> 1;
415 if (GET_CACHE(re, &s->gb) & 0x40000000)
419 SKIP_BITS(re, &s->gb, 2);
420 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
424 /* now quantify & encode AC coefficients */
426 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
433 level = ((level * 2 + 1) * qscale) >> 1;
434 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
435 SHOW_SBITS(re, &s->gb, 1);
436 SKIP_BITS(re, &s->gb, 1);
439 run = SHOW_UBITS(re, &s->gb, 6) + 1;
440 LAST_SKIP_BITS(re, &s->gb, 6);
441 UPDATE_CACHE(re, &s->gb);
442 level = SHOW_SBITS(re, &s->gb, 12);
443 SKIP_BITS(re, &s->gb, 12);
450 level = ((-level * 2 + 1) * qscale) >> 1;
453 level = ((level * 2 + 1) * qscale) >> 1;
458 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
461 UPDATE_CACHE(re, &s->gb);
464 LAST_SKIP_BITS(re, &s->gb, 2);
465 CLOSE_READER(re, &s->gb);
467 check_scantable_index(s, i);
469 s->block_last_index[n] = i;
473 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
474 int16_t *block, int n)
476 int level, dc, diff, i, j, run;
479 uint8_t *const scantable = s->intra_scantable.permutated;
480 const uint16_t *quant_matrix;
481 const int qscale = s->qscale;
486 quant_matrix = s->intra_matrix;
489 quant_matrix = s->chroma_intra_matrix;
490 component = (n & 1) + 1;
492 diff = decode_dc(&s->gb, component);
494 return AVERROR_INVALIDDATA;
495 dc = s->last_dc[component];
497 s->last_dc[component] = dc;
498 block[0] = dc * (1 << (3 - s->intra_dc_precision));
499 ff_tlog(s->avctx, "dc=%d\n", block[0]);
500 mismatch = block[0] ^ 1;
502 if (s->intra_vlc_format)
508 OPEN_READER(re, &s->gb);
509 /* now quantify & encode AC coefficients */
511 UPDATE_CACHE(re, &s->gb);
512 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
517 } else if (level != 0) {
522 level = (level * qscale * quant_matrix[j]) >> 4;
523 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
524 SHOW_SBITS(re, &s->gb, 1);
525 LAST_SKIP_BITS(re, &s->gb, 1);
528 run = SHOW_UBITS(re, &s->gb, 6) + 1;
529 SKIP_BITS(re, &s->gb, 6);
530 level = SHOW_SBITS(re, &s->gb, 12);
531 LAST_SKIP_BITS(re, &s->gb, 12);
537 level = (-level * qscale * quant_matrix[j]) >> 4;
540 level = (level * qscale * quant_matrix[j]) >> 4;
547 CLOSE_READER(re, &s->gb);
549 block[63] ^= mismatch & 1;
551 check_scantable_index(s, i);
553 s->block_last_index[n] = i;
558 * Changing this would eat up any speed benefits it has.
559 * Do not use "fast" flag if you need the code to be robust.
561 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
562 int16_t *block, int n)
564 int level, dc, diff, i, j, run;
567 uint8_t *const scantable = s->intra_scantable.permutated;
568 const uint16_t *quant_matrix;
569 const int qscale = s->qscale;
573 quant_matrix = s->intra_matrix;
576 quant_matrix = s->chroma_intra_matrix;
577 component = (n & 1) + 1;
579 diff = decode_dc(&s->gb, component);
581 return AVERROR_INVALIDDATA;
582 dc = s->last_dc[component];
584 s->last_dc[component] = dc;
585 block[0] = dc * (1 << (3 - s->intra_dc_precision));
587 if (s->intra_vlc_format)
593 OPEN_READER(re, &s->gb);
594 /* now quantify & encode AC coefficients */
596 UPDATE_CACHE(re, &s->gb);
597 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
600 if (level >= 64 || i > 63) {
602 } else if (level != 0) {
605 level = (level * qscale * quant_matrix[j]) >> 4;
606 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
607 SHOW_SBITS(re, &s->gb, 1);
608 LAST_SKIP_BITS(re, &s->gb, 1);
611 run = SHOW_UBITS(re, &s->gb, 6) + 1;
612 SKIP_BITS(re, &s->gb, 6);
613 level = SHOW_SBITS(re, &s->gb, 12);
614 LAST_SKIP_BITS(re, &s->gb, 12);
618 level = (-level * qscale * quant_matrix[j]) >> 4;
621 level = (level * qscale * quant_matrix[j]) >> 4;
627 CLOSE_READER(re, &s->gb);
630 check_scantable_index(s, i);
632 s->block_last_index[n] = i;
636 /******************************************/
639 static inline int get_dmv(MpegEncContext *s)
641 if (get_bits1(&s->gb))
642 return 1 - (get_bits1(&s->gb) << 1);
647 /* motion type (for MPEG-2) */
653 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
655 int i, j, k, cbp, val, mb_type, motion_type;
656 const int mb_block_count = 4 + (1 << s->chroma_format);
659 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
661 av_assert2(s->mb_skipped == 0);
663 if (s->mb_skip_run-- != 0) {
664 if (s->pict_type == AV_PICTURE_TYPE_P) {
666 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
667 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
672 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
674 // FIXME not sure if this is allowed in MPEG at all
675 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
676 if (IS_INTRA(mb_type)) {
677 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
678 return AVERROR_INVALIDDATA;
680 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
681 mb_type | MB_TYPE_SKIP;
683 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
690 switch (s->pict_type) {
692 case AV_PICTURE_TYPE_I:
693 if (get_bits1(&s->gb) == 0) {
694 if (get_bits1(&s->gb) == 0) {
695 av_log(s->avctx, AV_LOG_ERROR,
696 "Invalid mb type in I-frame at %d %d\n",
698 return AVERROR_INVALIDDATA;
700 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
702 mb_type = MB_TYPE_INTRA;
705 case AV_PICTURE_TYPE_P:
706 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
708 av_log(s->avctx, AV_LOG_ERROR,
709 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
710 return AVERROR_INVALIDDATA;
712 mb_type = ptype2mb_type[mb_type];
714 case AV_PICTURE_TYPE_B:
715 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
717 av_log(s->avctx, AV_LOG_ERROR,
718 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
719 return AVERROR_INVALIDDATA;
721 mb_type = btype2mb_type[mb_type];
724 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
725 // motion_type = 0; /* avoid warning */
726 if (IS_INTRA(mb_type)) {
727 s->bdsp.clear_blocks(s->block[0]);
729 if (!s->chroma_y_shift)
730 s->bdsp.clear_blocks(s->block[6]);
732 /* compute DCT type */
733 // FIXME: add an interlaced_dct coded var?
734 if (s->picture_structure == PICT_FRAME &&
735 !s->frame_pred_frame_dct)
736 s->interlaced_dct = get_bits1(&s->gb);
738 if (IS_QUANT(mb_type))
739 s->qscale = mpeg_get_qscale(s);
741 if (s->concealment_motion_vectors) {
742 /* just parse them */
743 if (s->picture_structure != PICT_FRAME)
744 skip_bits1(&s->gb); /* field select */
747 s->last_mv[0][0][0] =
748 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
749 s->last_mv[0][0][0]);
751 s->last_mv[0][0][1] =
752 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
753 s->last_mv[0][0][1]);
755 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
757 /* reset mv prediction */
758 memset(s->last_mv, 0, sizeof(s->last_mv));
761 // if 1, we memcpy blocks in xvmcvideo
762 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
763 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
765 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
766 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
767 for (i = 0; i < 6; i++)
768 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
770 for (i = 0; i < mb_block_count; i++)
771 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
775 for (i = 0; i < 6; i++) {
776 ret = ff_mpeg1_decode_block_intra(&s->gb,
778 s->intra_scantable.permutated,
779 s->last_dc, *s->pblocks[i],
782 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
787 s->block_last_index[i] = ret;
791 if (mb_type & MB_TYPE_ZERO_MV) {
792 av_assert2(mb_type & MB_TYPE_CBP);
794 s->mv_dir = MV_DIR_FORWARD;
795 if (s->picture_structure == PICT_FRAME) {
796 if (s->picture_structure == PICT_FRAME
797 && !s->frame_pred_frame_dct)
798 s->interlaced_dct = get_bits1(&s->gb);
799 s->mv_type = MV_TYPE_16X16;
801 s->mv_type = MV_TYPE_FIELD;
802 mb_type |= MB_TYPE_INTERLACED;
803 s->field_select[0][0] = s->picture_structure - 1;
806 if (IS_QUANT(mb_type))
807 s->qscale = mpeg_get_qscale(s);
809 s->last_mv[0][0][0] = 0;
810 s->last_mv[0][0][1] = 0;
811 s->last_mv[0][1][0] = 0;
812 s->last_mv[0][1][1] = 0;
816 av_assert2(mb_type & MB_TYPE_L0L1);
817 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
818 /* get additional motion vector type */
819 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
820 motion_type = MT_FRAME;
822 motion_type = get_bits(&s->gb, 2);
823 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
824 s->interlaced_dct = get_bits1(&s->gb);
827 if (IS_QUANT(mb_type))
828 s->qscale = mpeg_get_qscale(s);
831 s->mv_dir = (mb_type >> 13) & 3;
832 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
833 switch (motion_type) {
834 case MT_FRAME: /* or MT_16X8 */
835 if (s->picture_structure == PICT_FRAME) {
836 mb_type |= MB_TYPE_16x16;
837 s->mv_type = MV_TYPE_16X16;
838 for (i = 0; i < 2; i++) {
839 if (USES_LIST(mb_type, i)) {
842 s->last_mv[i][0][0] =
843 s->last_mv[i][1][0] =
844 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
845 s->last_mv[i][0][0]);
847 s->last_mv[i][0][1] =
848 s->last_mv[i][1][1] =
849 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
850 s->last_mv[i][0][1]);
851 /* full_pel: only for MPEG-1 */
852 if (s->full_pel[i]) {
859 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
860 s->mv_type = MV_TYPE_16X8;
861 for (i = 0; i < 2; i++) {
862 if (USES_LIST(mb_type, i)) {
864 for (j = 0; j < 2; j++) {
865 s->field_select[i][j] = get_bits1(&s->gb);
866 for (k = 0; k < 2; k++) {
867 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
868 s->last_mv[i][j][k]);
869 s->last_mv[i][j][k] = val;
870 s->mv[i][j][k] = val;
878 s->mv_type = MV_TYPE_FIELD;
879 if (s->picture_structure == PICT_FRAME) {
880 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
881 for (i = 0; i < 2; i++) {
882 if (USES_LIST(mb_type, i)) {
883 for (j = 0; j < 2; j++) {
884 s->field_select[i][j] = get_bits1(&s->gb);
885 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
886 s->last_mv[i][j][0]);
887 s->last_mv[i][j][0] = val;
888 s->mv[i][j][0] = val;
889 ff_tlog(s->avctx, "fmx=%d\n", val);
890 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
891 s->last_mv[i][j][1] >> 1);
892 s->last_mv[i][j][1] = 2 * val;
893 s->mv[i][j][1] = val;
894 ff_tlog(s->avctx, "fmy=%d\n", val);
899 av_assert0(!s->progressive_sequence);
900 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
901 for (i = 0; i < 2; i++) {
902 if (USES_LIST(mb_type, i)) {
903 s->field_select[i][0] = get_bits1(&s->gb);
904 for (k = 0; k < 2; k++) {
905 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
906 s->last_mv[i][0][k]);
907 s->last_mv[i][0][k] = val;
908 s->last_mv[i][1][k] = val;
909 s->mv[i][0][k] = val;
916 if (s->progressive_sequence){
917 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
918 return AVERROR_INVALIDDATA;
920 s->mv_type = MV_TYPE_DMV;
921 for (i = 0; i < 2; i++) {
922 if (USES_LIST(mb_type, i)) {
923 int dmx, dmy, mx, my, m;
924 const int my_shift = s->picture_structure == PICT_FRAME;
926 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
927 s->last_mv[i][0][0]);
928 s->last_mv[i][0][0] = mx;
929 s->last_mv[i][1][0] = mx;
931 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
932 s->last_mv[i][0][1] >> my_shift);
936 s->last_mv[i][0][1] = my * (1 << my_shift);
937 s->last_mv[i][1][1] = my * (1 << my_shift);
941 s->mv[i][1][0] = mx; // not used
942 s->mv[i][1][1] = my; // not used
944 if (s->picture_structure == PICT_FRAME) {
945 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
947 // m = 1 + 2 * s->top_field_first;
948 m = s->top_field_first ? 1 : 3;
950 /* top -> top pred */
951 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
952 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
954 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
955 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
957 mb_type |= MB_TYPE_16x16;
959 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
960 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
961 if (s->picture_structure == PICT_TOP_FIELD)
970 av_log(s->avctx, AV_LOG_ERROR,
971 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
972 return AVERROR_INVALIDDATA;
977 if (HAS_CBP(mb_type)) {
978 s->bdsp.clear_blocks(s->block[0]);
980 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
981 if (mb_block_count > 6) {
982 cbp *= 1 << mb_block_count - 6;
983 cbp |= get_bits(&s->gb, mb_block_count - 6);
984 s->bdsp.clear_blocks(s->block[6]);
987 av_log(s->avctx, AV_LOG_ERROR,
988 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
989 return AVERROR_INVALIDDATA;
992 // if 1, we memcpy blocks in xvmcvideo
993 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
994 ff_xvmc_pack_pblocks(s, cbp);
996 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
997 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
998 for (i = 0; i < 6; i++) {
1000 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1002 s->block_last_index[i] = -1;
1006 cbp <<= 12 - mb_block_count;
1008 for (i = 0; i < mb_block_count; i++) {
1009 if (cbp & (1 << 11)) {
1010 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1013 s->block_last_index[i] = -1;
1019 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1020 for (i = 0; i < 6; i++) {
1022 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1024 s->block_last_index[i] = -1;
1028 for (i = 0; i < 6; i++) {
1030 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1033 s->block_last_index[i] = -1;
1040 for (i = 0; i < 12; i++)
1041 s->block_last_index[i] = -1;
1045 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1050 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1052 Mpeg1Context *s = avctx->priv_data;
1053 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1055 ff_mpv_decode_defaults(s2);
1057 if ( avctx->codec_tag != AV_RL32("VCR2")
1058 && avctx->codec_tag != AV_RL32("BW10"))
1059 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1060 ff_mpv_decode_init(s2, avctx);
1062 s->mpeg_enc_ctx.avctx = avctx;
1064 /* we need some permutation to store matrices,
1065 * until the decoder sets the real permutation. */
1066 ff_mpv_idct_init(s2);
1067 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1068 ff_mpeg12_init_vlcs();
1070 s2->chroma_format = 1;
1071 s->mpeg_enc_ctx_allocated = 0;
1072 s->mpeg_enc_ctx.picture_number = 0;
1073 s->repeat_field = 0;
1074 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1075 avctx->color_range = AVCOL_RANGE_MPEG;
1080 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1081 const AVCodecContext *avctx_from)
1083 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1084 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1087 if (avctx == avctx_from ||
1088 !ctx_from->mpeg_enc_ctx_allocated ||
1089 !s1->context_initialized)
1092 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1096 if (!ctx->mpeg_enc_ctx_allocated)
1097 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1099 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1100 s->picture_number++;
1106 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1107 const uint8_t *new_perm)
1109 uint16_t temp_matrix[64];
1112 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1114 for (i = 0; i < 64; i++)
1115 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1118 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1119 #if CONFIG_MPEG1_NVDEC_HWACCEL
1122 #if CONFIG_MPEG1_XVMC_HWACCEL
1125 #if CONFIG_MPEG1_VDPAU_HWACCEL
1132 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1133 #if CONFIG_MPEG2_NVDEC_HWACCEL
1136 #if CONFIG_MPEG2_XVMC_HWACCEL
1139 #if CONFIG_MPEG2_VDPAU_HWACCEL
1142 #if CONFIG_MPEG2_DXVA2_HWACCEL
1143 AV_PIX_FMT_DXVA2_VLD,
1145 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1146 AV_PIX_FMT_D3D11VA_VLD,
1149 #if CONFIG_MPEG2_VAAPI_HWACCEL
1152 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1153 AV_PIX_FMT_VIDEOTOOLBOX,
1159 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1164 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1169 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1171 Mpeg1Context *s1 = avctx->priv_data;
1172 MpegEncContext *s = &s1->mpeg_enc_ctx;
1173 const enum AVPixelFormat *pix_fmts;
1175 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1176 return AV_PIX_FMT_GRAY8;
1178 if (s->chroma_format < 2)
1179 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1180 mpeg1_hwaccel_pixfmt_list_420 :
1181 mpeg2_hwaccel_pixfmt_list_420;
1182 else if (s->chroma_format == 2)
1183 pix_fmts = mpeg12_pixfmt_list_422;
1185 pix_fmts = mpeg12_pixfmt_list_444;
1187 return ff_thread_get_format(avctx, pix_fmts);
1190 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1192 // until then pix_fmt may be changed right after codec init
1194 if (avctx->idct_algo == FF_IDCT_AUTO)
1195 avctx->idct_algo = FF_IDCT_NONE;
1197 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1198 Mpeg1Context *s1 = avctx->priv_data;
1199 MpegEncContext *s = &s1->mpeg_enc_ctx;
1201 s->pack_pblocks = 1;
1205 /* Call this function when we know all parameters.
1206 * It may be called in different places for MPEG-1 and MPEG-2. */
1207 static int mpeg_decode_postinit(AVCodecContext *avctx)
1209 Mpeg1Context *s1 = avctx->priv_data;
1210 MpegEncContext *s = &s1->mpeg_enc_ctx;
1211 uint8_t old_permutation[64];
1214 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1216 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1217 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1220 if (s->aspect_ratio_info > 1) {
1222 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1223 (AVRational) { s1->pan_scan.width,
1224 s1->pan_scan.height }),
1225 (AVRational) { s->width, s->height });
1227 /* We ignore the spec here and guess a bit as reality does not
1228 * match the spec, see for example res_change_ffmpeg_aspect.ts
1229 * and sequence-display-aspect.mpg.
1230 * issue1613, 621, 562 */
1231 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1232 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1233 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1234 s->avctx->sample_aspect_ratio =
1235 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1236 (AVRational) { s->width, s->height });
1238 s->avctx->sample_aspect_ratio =
1239 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1240 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1241 // issue1613 4/3 16/9 -> 16/9
1242 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1243 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1244 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1245 ff_dlog(avctx, "aspect A %d/%d\n",
1246 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1247 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1248 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1249 s->avctx->sample_aspect_ratio.den);
1252 s->avctx->sample_aspect_ratio =
1253 ff_mpeg2_aspect[s->aspect_ratio_info];
1257 if (av_image_check_sar(s->width, s->height,
1258 avctx->sample_aspect_ratio) < 0) {
1259 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1260 avctx->sample_aspect_ratio.num,
1261 avctx->sample_aspect_ratio.den);
1262 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1265 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1266 avctx->coded_width != s->width ||
1267 avctx->coded_height != s->height ||
1268 s1->save_width != s->width ||
1269 s1->save_height != s->height ||
1270 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1271 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1273 if (s1->mpeg_enc_ctx_allocated) {
1274 ParseContext pc = s->parse_context;
1275 s->parse_context.buffer = 0;
1276 ff_mpv_common_end(s);
1277 s->parse_context = pc;
1278 s1->mpeg_enc_ctx_allocated = 0;
1281 ret = ff_set_dimensions(avctx, s->width, s->height);
1285 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1286 avctx->rc_max_rate = s->bit_rate;
1287 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1288 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1289 avctx->bit_rate = s->bit_rate;
1291 s1->save_aspect = s->avctx->sample_aspect_ratio;
1292 s1->save_width = s->width;
1293 s1->save_height = s->height;
1294 s1->save_progressive_seq = s->progressive_sequence;
1296 /* low_delay may be forced, in this case we will have B-frames
1297 * that behave like P-frames. */
1298 avctx->has_b_frames = !s->low_delay;
1300 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1302 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1303 avctx->ticks_per_frame = 1;
1305 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1308 av_reduce(&s->avctx->framerate.num,
1309 &s->avctx->framerate.den,
1310 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1311 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1313 avctx->ticks_per_frame = 2;
1315 switch (s->chroma_format) {
1316 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1318 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1319 default: av_assert0(0);
1323 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1324 setup_hwaccel_for_pixfmt(avctx);
1326 /* Quantization matrices may need reordering
1327 * if DCT permutation is changed. */
1328 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1330 ff_mpv_idct_init(s);
1331 if ((ret = ff_mpv_common_init(s)) < 0)
1334 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1335 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1336 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1337 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1339 s1->mpeg_enc_ctx_allocated = 1;
1344 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1347 Mpeg1Context *s1 = avctx->priv_data;
1348 MpegEncContext *s = &s1->mpeg_enc_ctx;
1349 int ref, f_code, vbv_delay;
1351 init_get_bits(&s->gb, buf, buf_size * 8);
1353 ref = get_bits(&s->gb, 10); /* temporal ref */
1354 s->pict_type = get_bits(&s->gb, 3);
1355 if (s->pict_type == 0 || s->pict_type > 3)
1356 return AVERROR_INVALIDDATA;
1358 vbv_delay = get_bits(&s->gb, 16);
1359 s->vbv_delay = vbv_delay;
1360 if (s->pict_type == AV_PICTURE_TYPE_P ||
1361 s->pict_type == AV_PICTURE_TYPE_B) {
1362 s->full_pel[0] = get_bits1(&s->gb);
1363 f_code = get_bits(&s->gb, 3);
1364 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1365 return AVERROR_INVALIDDATA;
1367 s->mpeg_f_code[0][0] = f_code;
1368 s->mpeg_f_code[0][1] = f_code;
1370 if (s->pict_type == AV_PICTURE_TYPE_B) {
1371 s->full_pel[1] = get_bits1(&s->gb);
1372 f_code = get_bits(&s->gb, 3);
1373 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1374 return AVERROR_INVALIDDATA;
1376 s->mpeg_f_code[1][0] = f_code;
1377 s->mpeg_f_code[1][1] = f_code;
1379 s->current_picture.f->pict_type = s->pict_type;
1380 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1382 if (avctx->debug & FF_DEBUG_PICT_INFO)
1383 av_log(avctx, AV_LOG_DEBUG,
1384 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1391 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1393 MpegEncContext *s = &s1->mpeg_enc_ctx;
1394 int horiz_size_ext, vert_size_ext;
1396 AVCPBProperties *cpb_props;
1398 skip_bits(&s->gb, 1); /* profile and level esc*/
1399 s->avctx->profile = get_bits(&s->gb, 3);
1400 s->avctx->level = get_bits(&s->gb, 4);
1401 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1402 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1404 if (!s->chroma_format) {
1405 s->chroma_format = 1;
1406 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1409 horiz_size_ext = get_bits(&s->gb, 2);
1410 vert_size_ext = get_bits(&s->gb, 2);
1411 s->width |= (horiz_size_ext << 12);
1412 s->height |= (vert_size_ext << 12);
1413 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1414 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1415 check_marker(s->avctx, &s->gb, "after bit rate extension");
1416 s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1418 s->low_delay = get_bits1(&s->gb);
1419 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1422 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1423 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1425 ff_dlog(s->avctx, "sequence extension\n");
1426 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1428 if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1429 cpb_props->buffer_size = s1->rc_buffer_size;
1430 if (s->bit_rate != 0x3FFFF*400)
1431 cpb_props->max_bitrate = s->bit_rate;
1434 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1435 av_log(s->avctx, AV_LOG_DEBUG,
1436 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1437 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1438 s1->rc_buffer_size, s->bit_rate);
1441 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1443 MpegEncContext *s = &s1->mpeg_enc_ctx;
1444 int color_description, w, h;
1446 skip_bits(&s->gb, 3); /* video format */
1447 color_description = get_bits1(&s->gb);
1448 if (color_description) {
1449 s->avctx->color_primaries = get_bits(&s->gb, 8);
1450 s->avctx->color_trc = get_bits(&s->gb, 8);
1451 s->avctx->colorspace = get_bits(&s->gb, 8);
1453 w = get_bits(&s->gb, 14);
1454 skip_bits(&s->gb, 1); // marker
1455 h = get_bits(&s->gb, 14);
1456 // remaining 3 bits are zero padding
1458 s1->pan_scan.width = 16 * w;
1459 s1->pan_scan.height = 16 * h;
1461 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1462 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1465 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1467 MpegEncContext *s = &s1->mpeg_enc_ctx;
1471 if (s->progressive_sequence) {
1472 if (s->repeat_first_field) {
1474 if (s->top_field_first)
1478 if (s->picture_structure == PICT_FRAME) {
1480 if (s->repeat_first_field)
1484 for (i = 0; i < nofco; i++) {
1485 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1486 skip_bits(&s->gb, 1); // marker
1487 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1488 skip_bits(&s->gb, 1); // marker
1491 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1492 av_log(s->avctx, AV_LOG_DEBUG,
1493 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1494 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1495 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1496 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1499 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1500 uint16_t matrix1[64], int intra)
1504 for (i = 0; i < 64; i++) {
1505 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1506 int v = get_bits(&s->gb, 8);
1508 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1509 return AVERROR_INVALIDDATA;
1511 if (intra && i == 0 && v != 8) {
1512 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1513 v = 8; // needed by pink.mpg / issue1046
1522 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1524 ff_dlog(s->avctx, "matrix extension\n");
1526 if (get_bits1(&s->gb))
1527 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1528 if (get_bits1(&s->gb))
1529 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1530 if (get_bits1(&s->gb))
1531 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1532 if (get_bits1(&s->gb))
1533 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1536 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1538 MpegEncContext *s = &s1->mpeg_enc_ctx;
1540 s->full_pel[0] = s->full_pel[1] = 0;
1541 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1542 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1543 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1544 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1545 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1546 av_log(s->avctx, AV_LOG_ERROR,
1547 "Missing picture start code, guessing missing values\n");
1548 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1549 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1550 s->pict_type = AV_PICTURE_TYPE_I;
1552 s->pict_type = AV_PICTURE_TYPE_P;
1554 s->pict_type = AV_PICTURE_TYPE_B;
1555 s->current_picture.f->pict_type = s->pict_type;
1556 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1558 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1559 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1560 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1561 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1563 s->intra_dc_precision = get_bits(&s->gb, 2);
1564 s->picture_structure = get_bits(&s->gb, 2);
1565 s->top_field_first = get_bits1(&s->gb);
1566 s->frame_pred_frame_dct = get_bits1(&s->gb);
1567 s->concealment_motion_vectors = get_bits1(&s->gb);
1568 s->q_scale_type = get_bits1(&s->gb);
1569 s->intra_vlc_format = get_bits1(&s->gb);
1570 s->alternate_scan = get_bits1(&s->gb);
1571 s->repeat_first_field = get_bits1(&s->gb);
1572 s->chroma_420_type = get_bits1(&s->gb);
1573 s->progressive_frame = get_bits1(&s->gb);
1575 if (s->alternate_scan) {
1576 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1577 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1579 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1580 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1583 /* composite display not parsed */
1584 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1585 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1586 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1587 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1588 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1589 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1590 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1591 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1592 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1595 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1597 AVCodecContext *avctx = s->avctx;
1598 Mpeg1Context *s1 = (Mpeg1Context *) s;
1601 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1602 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1603 return AVERROR_INVALIDDATA;
1606 /* start frame decoding */
1607 if (s->first_field || s->picture_structure == PICT_FRAME) {
1608 AVFrameSideData *pan_scan;
1610 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1613 ff_mpeg_er_frame_start(s);
1615 /* first check if we must repeat the frame */
1616 s->current_picture_ptr->f->repeat_pict = 0;
1617 if (s->repeat_first_field) {
1618 if (s->progressive_sequence) {
1619 if (s->top_field_first)
1620 s->current_picture_ptr->f->repeat_pict = 4;
1622 s->current_picture_ptr->f->repeat_pict = 2;
1623 } else if (s->progressive_frame) {
1624 s->current_picture_ptr->f->repeat_pict = 1;
1628 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1629 AV_FRAME_DATA_PANSCAN,
1630 sizeof(s1->pan_scan));
1632 return AVERROR(ENOMEM);
1633 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1635 if (s1->a53_buf_ref) {
1636 AVFrameSideData *sd = av_frame_new_side_data_from_buf(
1637 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1640 av_buffer_unref(&s1->a53_buf_ref);
1641 s1->a53_buf_ref = NULL;
1644 if (s1->has_stereo3d) {
1645 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1647 return AVERROR(ENOMEM);
1649 *stereo = s1->stereo3d;
1650 s1->has_stereo3d = 0;
1654 AVFrameSideData *sd =
1655 av_frame_new_side_data(s->current_picture_ptr->f,
1656 AV_FRAME_DATA_AFD, 1);
1658 return AVERROR(ENOMEM);
1660 *sd->data = s1->afd;
1664 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1665 ff_thread_finish_setup(avctx);
1666 } else { // second field
1669 if (!s->current_picture_ptr) {
1670 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1671 return AVERROR_INVALIDDATA;
1674 if (s->avctx->hwaccel) {
1675 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1676 av_log(avctx, AV_LOG_ERROR,
1677 "hardware accelerator failed to decode first field\n");
1682 for (i = 0; i < 4; i++) {
1683 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1684 if (s->picture_structure == PICT_BOTTOM_FIELD)
1685 s->current_picture.f->data[i] +=
1686 s->current_picture_ptr->f->linesize[i];
1690 if (avctx->hwaccel) {
1691 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1698 #define DECODE_SLICE_ERROR -1
1699 #define DECODE_SLICE_OK 0
1703 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1704 * @return DECODE_SLICE_ERROR if the slice is damaged,
1705 * DECODE_SLICE_OK if this slice is OK
1707 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1708 const uint8_t **buf, int buf_size)
1710 AVCodecContext *avctx = s->avctx;
1711 const int lowres = s->avctx->lowres;
1712 const int field_pic = s->picture_structure != PICT_FRAME;
1716 s->resync_mb_y = -1;
1718 av_assert0(mb_y < s->mb_height);
1720 init_get_bits(&s->gb, *buf, buf_size * 8);
1721 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1722 skip_bits(&s->gb, 3);
1724 ff_mpeg1_clean_buffers(s);
1725 s->interlaced_dct = 0;
1727 s->qscale = mpeg_get_qscale(s);
1729 if (s->qscale == 0) {
1730 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1731 return AVERROR_INVALIDDATA;
1734 /* extra slice info */
1735 if (skip_1stop_8data_bits(&s->gb) < 0)
1736 return AVERROR_INVALIDDATA;
1740 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1743 while (get_bits_left(&s->gb) > 0) {
1744 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1745 MBINCR_VLC_BITS, 2);
1747 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1748 return AVERROR_INVALIDDATA;
1753 /* otherwise, stuffing, nothing to do */
1761 if (s->mb_x >= (unsigned) s->mb_width) {
1762 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1763 return AVERROR_INVALIDDATA;
1766 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1767 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1768 int start_code = -1;
1769 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1770 if (buf_end < *buf + buf_size)
1773 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1774 return DECODE_SLICE_ERROR;
1776 return DECODE_SLICE_OK;
1779 s->resync_mb_x = s->mb_x;
1780 s->resync_mb_y = s->mb_y = mb_y;
1782 ff_init_block_index(s);
1784 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1785 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1786 av_log(s->avctx, AV_LOG_DEBUG,
1787 "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",
1789 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1790 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1791 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1792 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1793 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1794 s->progressive_sequence ? "ps" : "",
1795 s->progressive_frame ? "pf" : "",
1796 s->alternate_scan ? "alt" : "",
1797 s->top_field_first ? "top" : "",
1798 s->intra_dc_precision, s->picture_structure,
1799 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1800 s->q_scale_type, s->intra_vlc_format,
1801 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1806 // If 1, we memcpy blocks in xvmcvideo.
1807 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1808 ff_xvmc_init_block(s); // set s->block
1810 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1813 // Note motion_val is normally NULL unless we want to extract the MVs.
1814 if (s->current_picture.motion_val[0] && !s->encoding) {
1815 const int wrap = s->b8_stride;
1816 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1817 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1818 int motion_x, motion_y, dir, i;
1820 for (i = 0; i < 2; i++) {
1821 for (dir = 0; dir < 2; dir++) {
1823 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1824 motion_x = motion_y = 0;
1825 } else if (s->mv_type == MV_TYPE_16X16 ||
1826 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1827 motion_x = s->mv[dir][0][0];
1828 motion_y = s->mv[dir][0][1];
1829 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1830 motion_x = s->mv[dir][i][0];
1831 motion_y = s->mv[dir][i][1];
1834 s->current_picture.motion_val[dir][xy][0] = motion_x;
1835 s->current_picture.motion_val[dir][xy][1] = motion_y;
1836 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1837 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1838 s->current_picture.ref_index [dir][b8_xy] =
1839 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1840 av_assert2(s->field_select[dir][i] == 0 ||
1841 s->field_select[dir][i] == 1);
1848 s->dest[0] += 16 >> lowres;
1849 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1850 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1852 ff_mpv_reconstruct_mb(s, s->block);
1854 if (++s->mb_x >= s->mb_width) {
1855 const int mb_size = 16 >> s->avctx->lowres;
1858 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1859 ff_mpv_report_decode_progress(s);
1862 s->mb_y += 1 << field_pic;
1864 if (s->mb_y >= s->mb_height) {
1865 int left = get_bits_left(&s->gb);
1866 int is_d10 = s->chroma_format == 2 &&
1867 s->pict_type == AV_PICTURE_TYPE_I &&
1868 avctx->profile == 0 && avctx->level == 5 &&
1869 s->intra_dc_precision == 2 &&
1870 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1871 s->progressive_frame == 0
1872 /* vbv_delay == 0xBBB || 0xE10 */;
1874 if (left >= 32 && !is_d10) {
1875 GetBitContext gb = s->gb;
1876 align_get_bits(&gb);
1877 if (show_bits(&gb, 24) == 0x060E2B) {
1878 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1881 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1882 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1888 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1889 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1890 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1891 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1892 return AVERROR_INVALIDDATA;
1896 // There are some files out there which are missing the last slice
1897 // in cases where the slice is completely outside the visible
1898 // area, we detect this here instead of running into the end expecting
1900 left = get_bits_left(&s->gb);
1901 if (s->mb_y >= ((s->height + 15) >> 4) &&
1902 !s->progressive_sequence &&
1905 s->mb_skip_run == -1 &&
1906 (!left || show_bits(&s->gb, left) == 0))
1909 ff_init_block_index(s);
1912 /* skip mb handling */
1913 if (s->mb_skip_run == -1) {
1914 /* read increment again */
1917 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1918 MBINCR_VLC_BITS, 2);
1920 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1921 return AVERROR_INVALIDDATA;
1925 s->mb_skip_run += 33;
1926 } else if (code == 35) {
1927 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1928 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1929 return AVERROR_INVALIDDATA;
1931 goto eos; /* end of slice */
1933 /* otherwise, stuffing, nothing to do */
1935 s->mb_skip_run += code;
1939 if (s->mb_skip_run) {
1941 if (s->pict_type == AV_PICTURE_TYPE_I) {
1942 av_log(s->avctx, AV_LOG_ERROR,
1943 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1944 return AVERROR_INVALIDDATA;
1949 for (i = 0; i < 12; i++)
1950 s->block_last_index[i] = -1;
1951 if (s->picture_structure == PICT_FRAME)
1952 s->mv_type = MV_TYPE_16X16;
1954 s->mv_type = MV_TYPE_FIELD;
1955 if (s->pict_type == AV_PICTURE_TYPE_P) {
1956 /* if P type, zero motion vector is implied */
1957 s->mv_dir = MV_DIR_FORWARD;
1958 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1959 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1960 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1961 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1963 /* if B type, reuse previous vectors and directions */
1964 s->mv[0][0][0] = s->last_mv[0][0][0];
1965 s->mv[0][0][1] = s->last_mv[0][0][1];
1966 s->mv[1][0][0] = s->last_mv[1][0][0];
1967 s->mv[1][0][1] = s->last_mv[1][0][1];
1968 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1969 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1974 eos: // end of slice
1975 if (get_bits_left(&s->gb) < 0) {
1976 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1977 return AVERROR_INVALIDDATA;
1979 *buf += (get_bits_count(&s->gb) - 1) / 8;
1980 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);
1984 static int slice_decode_thread(AVCodecContext *c, void *arg)
1986 MpegEncContext *s = *(void **) arg;
1987 const uint8_t *buf = s->gb.buffer;
1988 int mb_y = s->start_mb_y;
1989 const int field_pic = s->picture_structure != PICT_FRAME;
1991 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1994 uint32_t start_code;
1997 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1999 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2000 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2001 s->start_mb_y, s->end_mb_y, s->er.error_count);
2003 if (c->err_recognition & AV_EF_EXPLODE)
2005 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2006 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2008 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2010 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2011 s->mb_x - 1, s->mb_y,
2012 ER_AC_END | ER_DC_END | ER_MV_END);
2015 if (s->mb_y == s->end_mb_y)
2019 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2020 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2021 return AVERROR_INVALIDDATA;
2022 mb_y = start_code - SLICE_MIN_START_CODE;
2023 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2024 mb_y += (*buf&0xE0)<<2;
2026 if (s->picture_structure == PICT_BOTTOM_FIELD)
2028 if (mb_y >= s->end_mb_y)
2029 return AVERROR_INVALIDDATA;
2034 * Handle slice ends.
2035 * @return 1 if it seems to be the last slice
2037 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2039 Mpeg1Context *s1 = avctx->priv_data;
2040 MpegEncContext *s = &s1->mpeg_enc_ctx;
2042 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2045 if (s->avctx->hwaccel) {
2046 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2048 av_log(avctx, AV_LOG_ERROR,
2049 "hardware accelerator failed to decode picture\n");
2054 /* end of slice reached */
2055 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2058 ff_er_frame_end(&s->er);
2060 ff_mpv_frame_end(s);
2062 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2063 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2066 ff_print_debug_info(s, s->current_picture_ptr, pict);
2067 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2069 if (avctx->active_thread_type & FF_THREAD_FRAME)
2070 s->picture_number++;
2071 /* latency of 1 frame for I- and P-frames */
2072 /* XXX: use another variable than picture_number */
2073 if (s->last_picture_ptr) {
2074 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2077 ff_print_debug_info(s, s->last_picture_ptr, pict);
2078 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2088 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2089 const uint8_t *buf, int buf_size)
2091 Mpeg1Context *s1 = avctx->priv_data;
2092 MpegEncContext *s = &s1->mpeg_enc_ctx;
2096 init_get_bits(&s->gb, buf, buf_size * 8);
2098 width = get_bits(&s->gb, 12);
2099 height = get_bits(&s->gb, 12);
2100 if (width == 0 || height == 0) {
2101 av_log(avctx, AV_LOG_WARNING,
2102 "Invalid horizontal or vertical size value.\n");
2103 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2104 return AVERROR_INVALIDDATA;
2106 s->aspect_ratio_info = get_bits(&s->gb, 4);
2107 if (s->aspect_ratio_info == 0) {
2108 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2109 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2110 return AVERROR_INVALIDDATA;
2112 s->frame_rate_index = get_bits(&s->gb, 4);
2113 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2114 av_log(avctx, AV_LOG_WARNING,
2115 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2116 s->frame_rate_index = 1;
2118 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2119 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2120 return AVERROR_INVALIDDATA;
2123 s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2124 skip_bits(&s->gb, 1);
2127 if (get_bits1(&s->gb)) {
2128 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2130 for (i = 0; i < 64; i++) {
2131 j = s->idsp.idct_permutation[i];
2132 v = ff_mpeg1_default_intra_matrix[i];
2133 s->intra_matrix[j] = v;
2134 s->chroma_intra_matrix[j] = v;
2137 if (get_bits1(&s->gb)) {
2138 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2140 for (i = 0; i < 64; i++) {
2141 int j = s->idsp.idct_permutation[i];
2142 v = ff_mpeg1_default_non_intra_matrix[i];
2143 s->inter_matrix[j] = v;
2144 s->chroma_inter_matrix[j] = v;
2148 if (show_bits(&s->gb, 23) != 0) {
2149 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2150 return AVERROR_INVALIDDATA;
2156 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2157 s->progressive_sequence = 1;
2158 s->progressive_frame = 1;
2159 s->picture_structure = PICT_FRAME;
2161 s->frame_pred_frame_dct = 1;
2162 s->chroma_format = 1;
2164 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2165 s->out_format = FMT_MPEG1;
2166 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2167 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2170 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2171 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2172 s1->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2177 static int vcr2_init_sequence(AVCodecContext *avctx)
2179 Mpeg1Context *s1 = avctx->priv_data;
2180 MpegEncContext *s = &s1->mpeg_enc_ctx;
2183 /* start new MPEG-1 context decoding */
2184 s->out_format = FMT_MPEG1;
2185 if (s1->mpeg_enc_ctx_allocated) {
2186 ff_mpv_common_end(s);
2187 s1->mpeg_enc_ctx_allocated = 0;
2189 s->width = avctx->coded_width;
2190 s->height = avctx->coded_height;
2191 avctx->has_b_frames = 0; // true?
2194 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2195 setup_hwaccel_for_pixfmt(avctx);
2197 ff_mpv_idct_init(s);
2198 if ((ret = ff_mpv_common_init(s)) < 0)
2200 s1->mpeg_enc_ctx_allocated = 1;
2202 for (i = 0; i < 64; i++) {
2203 int j = s->idsp.idct_permutation[i];
2204 v = ff_mpeg1_default_intra_matrix[i];
2205 s->intra_matrix[j] = v;
2206 s->chroma_intra_matrix[j] = v;
2208 v = ff_mpeg1_default_non_intra_matrix[i];
2209 s->inter_matrix[j] = v;
2210 s->chroma_inter_matrix[j] = v;
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;
2219 if (s->codec_tag == AV_RL32("BW10")) {
2220 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2222 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2223 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2225 s1->save_width = s->width;
2226 s1->save_height = s->height;
2227 s1->save_progressive_seq = s->progressive_sequence;
2231 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2232 const uint8_t *p, int buf_size)
2234 Mpeg1Context *s1 = avctx->priv_data;
2236 if (buf_size >= 6 &&
2237 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2238 p[4] == 3 && (p[5] & 0x40)) {
2239 /* extract A53 Part 4 CC data */
2240 int cc_count = p[5] & 0x1f;
2241 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2242 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2243 const uint64_t new_size = (old_size + cc_count
2247 if (new_size > INT_MAX)
2248 return AVERROR(EINVAL);
2250 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2252 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
2254 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2257 } else if (buf_size >= 2 &&
2258 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2259 /* extract SCTE-20 CC data */
2264 init_get_bits(&gb, p + 2, buf_size - 2);
2265 cc_count = get_bits(&gb, 5);
2267 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2268 const uint64_t new_size = (old_size + cc_count
2270 if (new_size > INT_MAX)
2271 return AVERROR(EINVAL);
2273 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2275 uint8_t field, cc1, cc2;
2276 uint8_t *cap = s1->a53_buf_ref->data;
2278 memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3);
2279 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2280 skip_bits(&gb, 2); // priority
2281 field = get_bits(&gb, 2);
2282 skip_bits(&gb, 5); // line_offset
2283 cc1 = get_bits(&gb, 8);
2284 cc2 = get_bits(&gb, 8);
2285 skip_bits(&gb, 1); // marker
2287 if (!field) { // forbidden
2288 cap[0] = cap[1] = cap[2] = 0x00;
2290 field = (field == 2 ? 1 : 0);
2291 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2292 cap[0] = 0x04 | field;
2293 cap[1] = ff_reverse[cc1];
2294 cap[2] = ff_reverse[cc2];
2299 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2302 } else if (buf_size >= 11 &&
2303 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2304 /* extract DVD CC data
2306 * uint32_t user_data_start_code 0x000001B2 (big endian)
2307 * uint16_t user_identifier 0x4343 "CC"
2308 * uint8_t user_data_type_code 0x01
2309 * uint8_t caption_block_size 0xF8
2311 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2312 * bit 6 caption_filler 0
2313 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2314 * bit 0 caption_extra_field_added 1=one additional caption word
2316 * struct caption_field_block {
2318 * bit 7:1 caption_filler 0x7F (all 1s)
2319 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2320 * uint8_t caption_first_byte
2321 * uint8_t caption_second_byte
2322 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2324 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2325 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2326 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2327 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2328 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2331 // There is a caption count field in the data, but it is often
2332 // incorrect. So count the number of captions present.
2333 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2335 // Transform the DVD format into A53 Part 4 format
2337 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2338 const uint64_t new_size = (old_size + cc_count
2340 if (new_size > INT_MAX)
2341 return AVERROR(EINVAL);
2343 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2345 uint8_t field1 = !!(p[4] & 0x80);
2346 uint8_t *cap = s1->a53_buf_ref->data;
2348 for (i = 0; i < cc_count; i++) {
2349 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2352 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2359 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2366 static void mpeg_decode_user_data(AVCodecContext *avctx,
2367 const uint8_t *p, int buf_size)
2369 Mpeg1Context *s = avctx->priv_data;
2370 const uint8_t *buf_end = p + buf_size;
2371 Mpeg1Context *s1 = avctx->priv_data;
2375 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2376 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2378 av_log(avctx, AV_LOG_ERROR, "\n");
2384 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2388 /* we parse the DTG active format information */
2389 if (buf_end - p >= 5 &&
2390 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2398 if (buf_end - p < 1)
2401 s1->afd = p[0] & 0x0f;
2403 } else if (buf_end - p >= 6 &&
2404 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2405 p[4] == 0x03) { // S3D_video_format_length
2406 // the 0x7F mask ignores the reserved_bit value
2407 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2409 if (S3D_video_format_type == 0x03 ||
2410 S3D_video_format_type == 0x04 ||
2411 S3D_video_format_type == 0x08 ||
2412 S3D_video_format_type == 0x23) {
2414 s1->has_stereo3d = 1;
2416 switch (S3D_video_format_type) {
2418 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2421 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2424 s1->stereo3d.type = AV_STEREO3D_2D;
2427 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2431 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2436 static void mpeg_decode_gop(AVCodecContext *avctx,
2437 const uint8_t *buf, int buf_size)
2439 Mpeg1Context *s1 = avctx->priv_data;
2440 MpegEncContext *s = &s1->mpeg_enc_ctx;
2444 init_get_bits(&s->gb, buf, buf_size * 8);
2446 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2448 #if FF_API_PRIVATE_OPT
2449 FF_DISABLE_DEPRECATION_WARNINGS
2450 avctx->timecode_frame_start = tc;
2451 FF_ENABLE_DEPRECATION_WARNINGS
2454 s->closed_gop = get_bits1(&s->gb);
2455 /* broken_link indicates that after editing the
2456 * reference frames of the first B-Frames after GOP I-Frame
2457 * are missing (open gop) */
2458 broken_link = get_bits1(&s->gb);
2460 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2461 char tcbuf[AV_TIMECODE_STR_SIZE];
2462 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2463 av_log(s->avctx, AV_LOG_DEBUG,
2464 "GOP (%s) closed_gop=%d broken_link=%d\n",
2465 tcbuf, s->closed_gop, broken_link);
2469 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2470 int *got_output, const uint8_t *buf, int buf_size)
2472 Mpeg1Context *s = avctx->priv_data;
2473 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2474 const uint8_t *buf_ptr = buf;
2475 const uint8_t *buf_end = buf + buf_size;
2476 int ret, input_size;
2477 int last_code = 0, skip_frame = 0;
2478 int picture_start_code_seen = 0;
2481 /* find next start code */
2482 uint32_t start_code = -1;
2483 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2484 if (start_code > 0x1ff) {
2487 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2490 av_assert0(avctx->thread_count > 1);
2492 avctx->execute(avctx, slice_decode_thread,
2493 &s2->thread_context[0], NULL,
2494 s->slice_count, sizeof(void *));
2495 for (i = 0; i < s->slice_count; i++)
2496 s2->er.error_count += s2->thread_context[i]->er.error_count;
2499 ret = slice_end(avctx, picture);
2503 // FIXME: merge with the stuff in mpeg_decode_slice
2504 if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2510 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2511 return AVERROR_INVALIDDATA;
2513 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2516 input_size = buf_end - buf_ptr;
2518 if (avctx->debug & FF_DEBUG_STARTCODE)
2519 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2520 start_code, buf_ptr - buf, input_size);
2522 /* prepare data for next start code */
2523 switch (start_code) {
2524 case SEQ_START_CODE:
2525 if (last_code == 0) {
2526 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2527 if (buf != avctx->extradata)
2530 av_log(avctx, AV_LOG_ERROR,
2531 "ignoring SEQ_START_CODE after %X\n", last_code);
2532 if (avctx->err_recognition & AV_EF_EXPLODE)
2533 return AVERROR_INVALIDDATA;
2537 case PICTURE_START_CODE:
2538 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2539 /* If it's a frame picture, there can't be more than one picture header.
2540 Yet, it does happen and we need to handle it. */
2541 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2544 picture_start_code_seen = 1;
2546 if (s2->width <= 0 || s2->height <= 0) {
2547 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2548 s2->width, s2->height);
2549 return AVERROR_INVALIDDATA;
2553 s2->intra_dc_precision= 3;
2554 s2->intra_matrix[0]= 1;
2556 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2557 !avctx->hwaccel && s->slice_count) {
2560 avctx->execute(avctx, slice_decode_thread,
2561 s2->thread_context, NULL,
2562 s->slice_count, sizeof(void *));
2563 for (i = 0; i < s->slice_count; i++)
2564 s2->er.error_count += s2->thread_context[i]->er.error_count;
2567 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2568 ret = mpeg_decode_postinit(avctx);
2570 av_log(avctx, AV_LOG_ERROR,
2571 "mpeg_decode_postinit() failure\n");
2575 /* We have a complete image: we try to decompress it. */
2576 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2579 last_code = PICTURE_START_CODE;
2581 av_log(avctx, AV_LOG_ERROR,
2582 "ignoring pic after %X\n", last_code);
2583 if (avctx->err_recognition & AV_EF_EXPLODE)
2584 return AVERROR_INVALIDDATA;
2587 case EXT_START_CODE:
2588 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2590 switch (get_bits(&s2->gb, 4)) {
2592 if (last_code == 0) {
2593 mpeg_decode_sequence_extension(s);
2595 av_log(avctx, AV_LOG_ERROR,
2596 "ignoring seq ext after %X\n", last_code);
2597 if (avctx->err_recognition & AV_EF_EXPLODE)
2598 return AVERROR_INVALIDDATA;
2602 mpeg_decode_sequence_display_extension(s);
2605 mpeg_decode_quant_matrix_extension(s2);
2608 mpeg_decode_picture_display_extension(s);
2611 if (last_code == PICTURE_START_CODE) {
2612 mpeg_decode_picture_coding_extension(s);
2614 av_log(avctx, AV_LOG_ERROR,
2615 "ignoring pic cod ext after %X\n", last_code);
2616 if (avctx->err_recognition & AV_EF_EXPLODE)
2617 return AVERROR_INVALIDDATA;
2622 case USER_START_CODE:
2623 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2625 case GOP_START_CODE:
2626 if (last_code == 0) {
2627 s2->first_field = 0;
2628 mpeg_decode_gop(avctx, buf_ptr, input_size);
2631 av_log(avctx, AV_LOG_ERROR,
2632 "ignoring GOP_START_CODE after %X\n", last_code);
2633 if (avctx->err_recognition & AV_EF_EXPLODE)
2634 return AVERROR_INVALIDDATA;
2638 if (start_code >= SLICE_MIN_START_CODE &&
2639 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2640 if (s2->progressive_sequence && !s2->progressive_frame) {
2641 s2->progressive_frame = 1;
2642 av_log(s2->avctx, AV_LOG_ERROR,
2643 "interlaced frame in progressive sequence, ignoring\n");
2646 if (s2->picture_structure == 0 ||
2647 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2648 av_log(s2->avctx, AV_LOG_ERROR,
2649 "picture_structure %d invalid, ignoring\n",
2650 s2->picture_structure);
2651 s2->picture_structure = PICT_FRAME;
2654 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2655 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2657 if (s2->picture_structure == PICT_FRAME) {
2658 s2->first_field = 0;
2659 s2->v_edge_pos = 16 * s2->mb_height;
2661 s2->first_field ^= 1;
2662 s2->v_edge_pos = 8 * s2->mb_height;
2663 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2666 if (start_code >= SLICE_MIN_START_CODE &&
2667 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2668 const int field_pic = s2->picture_structure != PICT_FRAME;
2669 int mb_y = start_code - SLICE_MIN_START_CODE;
2670 last_code = SLICE_MIN_START_CODE;
2671 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2672 mb_y += (*buf_ptr&0xE0)<<2;
2675 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2678 if (buf_end - buf_ptr < 2) {
2679 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2680 return AVERROR_INVALIDDATA;
2683 if (mb_y >= s2->mb_height) {
2684 av_log(s2->avctx, AV_LOG_ERROR,
2685 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2686 return AVERROR_INVALIDDATA;
2689 if (!s2->last_picture_ptr) {
2690 /* Skip B-frames if we do not have reference frames and
2691 * GOP is not closed. */
2692 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2693 if (!s2->closed_gop) {
2695 av_log(s2->avctx, AV_LOG_DEBUG,
2696 "Skipping B slice due to open GOP\n");
2701 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2703 if (!s2->next_picture_ptr) {
2704 /* Skip P-frames if we do not have a reference frame or
2705 * we have an invalid header. */
2706 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2708 av_log(s2->avctx, AV_LOG_DEBUG,
2709 "Skipping P slice due to !sync\n");
2713 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2714 s2->pict_type == AV_PICTURE_TYPE_B) ||
2715 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2716 s2->pict_type != AV_PICTURE_TYPE_I) ||
2717 avctx->skip_frame >= AVDISCARD_ALL) {
2722 if (!s->mpeg_enc_ctx_allocated)
2725 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2726 if (mb_y < avctx->skip_top ||
2727 mb_y >= s2->mb_height - avctx->skip_bottom)
2731 if (!s2->pict_type) {
2732 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2733 if (avctx->err_recognition & AV_EF_EXPLODE)
2734 return AVERROR_INVALIDDATA;
2738 if (s->first_slice) {
2741 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2744 if (!s2->current_picture_ptr) {
2745 av_log(avctx, AV_LOG_ERROR,
2746 "current_picture not initialized\n");
2747 return AVERROR_INVALIDDATA;
2751 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2753 int threshold = (s2->mb_height * s->slice_count +
2754 s2->slice_context_count / 2) /
2755 s2->slice_context_count;
2756 av_assert0(avctx->thread_count > 1);
2757 if (threshold <= mb_y) {
2758 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2760 thread_context->start_mb_y = mb_y;
2761 thread_context->end_mb_y = s2->mb_height;
2762 if (s->slice_count) {
2763 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2764 ret = ff_update_duplicate_context(thread_context, s2);
2768 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2771 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2773 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2777 if (avctx->err_recognition & AV_EF_EXPLODE)
2779 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2780 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2781 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2782 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2784 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2785 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2786 ER_AC_END | ER_DC_END | ER_MV_END);
2795 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2796 int *got_output, AVPacket *avpkt)
2798 const uint8_t *buf = avpkt->data;
2800 int buf_size = avpkt->size;
2801 Mpeg1Context *s = avctx->priv_data;
2802 AVFrame *picture = data;
2803 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2805 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2806 /* special case for last picture */
2807 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2808 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2812 s2->next_picture_ptr = NULL;
2819 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2820 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2823 if (ff_combine_frame(&s2->parse_context, next,
2824 (const uint8_t **) &buf, &buf_size) < 0)
2828 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2829 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2830 || s2->codec_tag == AV_RL32("BW10")
2832 vcr2_init_sequence(avctx);
2836 if (avctx->extradata && !s->extradata_decoded) {
2837 ret = decode_chunks(avctx, picture, got_output,
2838 avctx->extradata, avctx->extradata_size);
2840 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2841 av_frame_unref(picture);
2844 s->extradata_decoded = 1;
2845 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2846 s2->current_picture_ptr = NULL;
2851 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2852 if (ret<0 || *got_output) {
2853 s2->current_picture_ptr = NULL;
2855 if (s2->timecode_frame_start != -1 && *got_output) {
2856 char tcbuf[AV_TIMECODE_STR_SIZE];
2857 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2858 AV_FRAME_DATA_GOP_TIMECODE,
2861 return AVERROR(ENOMEM);
2862 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2864 av_timecode_make_mpeg_tc_string(tcbuf, s2->timecode_frame_start);
2865 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2867 s2->timecode_frame_start = -1;
2874 static void flush(AVCodecContext *avctx)
2876 Mpeg1Context *s = avctx->priv_data;
2880 ff_mpeg_flush(avctx);
2883 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2885 Mpeg1Context *s = avctx->priv_data;
2887 ff_mpv_common_end(&s->mpeg_enc_ctx);
2888 av_buffer_unref(&s->a53_buf_ref);
2892 AVCodec ff_mpeg1video_decoder = {
2893 .name = "mpeg1video",
2894 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2895 .type = AVMEDIA_TYPE_VIDEO,
2896 .id = AV_CODEC_ID_MPEG1VIDEO,
2897 .priv_data_size = sizeof(Mpeg1Context),
2898 .init = mpeg_decode_init,
2899 .close = mpeg_decode_end,
2900 .decode = mpeg_decode_frame,
2901 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2902 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2903 AV_CODEC_CAP_SLICE_THREADS,
2904 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2907 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2908 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2909 #if CONFIG_MPEG1_NVDEC_HWACCEL
2910 HWACCEL_NVDEC(mpeg1),
2912 #if CONFIG_MPEG1_VDPAU_HWACCEL
2913 HWACCEL_VDPAU(mpeg1),
2915 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2916 HWACCEL_VIDEOTOOLBOX(mpeg1),
2918 #if CONFIG_MPEG1_XVMC_HWACCEL
2919 HWACCEL_XVMC(mpeg1),
2925 AVCodec ff_mpeg2video_decoder = {
2926 .name = "mpeg2video",
2927 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2928 .type = AVMEDIA_TYPE_VIDEO,
2929 .id = AV_CODEC_ID_MPEG2VIDEO,
2930 .priv_data_size = sizeof(Mpeg1Context),
2931 .init = mpeg_decode_init,
2932 .close = mpeg_decode_end,
2933 .decode = mpeg_decode_frame,
2934 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2935 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2936 AV_CODEC_CAP_SLICE_THREADS,
2937 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2940 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2941 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2942 #if CONFIG_MPEG2_DXVA2_HWACCEL
2943 HWACCEL_DXVA2(mpeg2),
2945 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2946 HWACCEL_D3D11VA(mpeg2),
2948 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2949 HWACCEL_D3D11VA2(mpeg2),
2951 #if CONFIG_MPEG2_NVDEC_HWACCEL
2952 HWACCEL_NVDEC(mpeg2),
2954 #if CONFIG_MPEG2_VAAPI_HWACCEL
2955 HWACCEL_VAAPI(mpeg2),
2957 #if CONFIG_MPEG2_VDPAU_HWACCEL
2958 HWACCEL_VDPAU(mpeg2),
2960 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2961 HWACCEL_VIDEOTOOLBOX(mpeg2),
2963 #if CONFIG_MPEG2_XVMC_HWACCEL
2964 HWACCEL_XVMC(mpeg2),
2971 AVCodec ff_mpegvideo_decoder = {
2972 .name = "mpegvideo",
2973 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2974 .type = AVMEDIA_TYPE_VIDEO,
2975 .id = AV_CODEC_ID_MPEG2VIDEO,
2976 .priv_data_size = sizeof(Mpeg1Context),
2977 .init = mpeg_decode_init,
2978 .close = mpeg_decode_end,
2979 .decode = mpeg_decode_frame,
2980 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2981 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2986 typedef struct IPUContext {
2990 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2993 static int ipu_decode_frame(AVCodecContext *avctx, void *data,
2994 int *got_frame, AVPacket *avpkt)
2996 IPUContext *s = avctx->priv_data;
2997 MpegEncContext *m = &s->m;
2998 GetBitContext *gb = &m->gb;
2999 AVFrame * const frame = data;
3002 ret = ff_get_buffer(avctx, frame, 0);
3006 ret = init_get_bits8(gb, avpkt->data, avpkt->size);
3010 s->flags = get_bits(gb, 8);
3011 m->intra_dc_precision = s->flags & 3;
3012 m->q_scale_type = !!(s->flags & 0x40);
3013 m->intra_vlc_format = !!(s->flags & 0x20);
3014 m->alternate_scan = !!(s->flags & 0x10);
3016 if (s->flags & 0x10) {
3017 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_alternate_vertical_scan);
3018 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_alternate_vertical_scan);
3020 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_zigzag_direct);
3021 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_zigzag_direct);
3024 m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
3027 for (int y = 0; y < avctx->height; y += 16) {
3030 for (int x = 0; x < avctx->width; x += 16) {
3033 return AVERROR_INVALIDDATA;
3035 if (get_bits1(gb)) {
3039 return AVERROR_INVALIDDATA;
3047 m->qscale = mpeg_get_qscale(m);
3049 memset(s->block, 0, sizeof(s->block));
3051 for (int n = 0; n < 6; n++) {
3052 if (s->flags & 0x80) {
3053 ret = ff_mpeg1_decode_block_intra(&m->gb,
3055 m->intra_scantable.permutated,
3056 m->last_dc, s->block[n],
3059 m->block_last_index[n] = ret;
3061 ret = mpeg2_decode_block_intra(m, s->block[n], n);
3068 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
3069 frame->linesize[0], s->block[0]);
3070 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
3071 frame->linesize[0], s->block[1]);
3072 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
3073 frame->linesize[0], s->block[2]);
3074 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
3075 frame->linesize[0], s->block[3]);
3076 m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
3077 frame->linesize[1], s->block[4]);
3078 m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
3079 frame->linesize[2], s->block[5]);
3084 if (get_bits_left(gb) != 32)
3085 return AVERROR_INVALIDDATA;
3087 frame->pict_type = AV_PICTURE_TYPE_I;
3088 frame->key_frame = 1;
3094 static av_cold int ipu_decode_init(AVCodecContext *avctx)
3096 IPUContext *s = avctx->priv_data;
3097 MpegEncContext *m = &s->m;
3099 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3101 ff_mpv_decode_defaults(m);
3102 ff_mpv_decode_init(m, avctx);
3104 ff_mpv_idct_init(m);
3105 ff_mpeg12_common_init(m);
3106 ff_mpeg12_init_vlcs();
3108 for (int i = 0; i < 64; i++) {
3109 int j = m->idsp.idct_permutation[i];
3110 int v = ff_mpeg1_default_intra_matrix[i];
3111 m->intra_matrix[j] = v;
3112 m->chroma_intra_matrix[j] = v;
3115 for (int i = 0; i < 64; i++) {
3116 int j = m->idsp.idct_permutation[i];
3117 int v = ff_mpeg1_default_non_intra_matrix[i];
3118 m->inter_matrix[j] = v;
3119 m->chroma_inter_matrix[j] = v;
3125 static av_cold int ipu_decode_end(AVCodecContext *avctx)
3127 IPUContext *s = avctx->priv_data;
3129 ff_mpv_common_end(&s->m);
3134 AVCodec ff_ipu_decoder = {
3136 .long_name = NULL_IF_CONFIG_SMALL("IPU Video"),
3137 .type = AVMEDIA_TYPE_VIDEO,
3138 .id = AV_CODEC_ID_IPU,
3139 .priv_data_size = sizeof(IPUContext),
3140 .init = ipu_decode_init,
3141 .decode = ipu_decode_frame,
3142 .close = ipu_decode_end,
3143 .capabilities = AV_CODEC_CAP_DR1,
3144 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,