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 LAST_SKIP_BITS(re, &s->gb, 6);
530 UPDATE_CACHE(re, &s->gb);
531 level = SHOW_SBITS(re, &s->gb, 12);
532 SKIP_BITS(re, &s->gb, 12);
538 level = (-level * qscale * quant_matrix[j]) >> 4;
541 level = (level * qscale * quant_matrix[j]) >> 4;
548 CLOSE_READER(re, &s->gb);
550 block[63] ^= mismatch & 1;
552 check_scantable_index(s, i);
554 s->block_last_index[n] = i;
559 * Changing this would eat up any speed benefits it has.
560 * Do not use "fast" flag if you need the code to be robust.
562 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
563 int16_t *block, int n)
565 int level, dc, diff, i, j, run;
568 uint8_t *const scantable = s->intra_scantable.permutated;
569 const uint16_t *quant_matrix;
570 const int qscale = s->qscale;
574 quant_matrix = s->intra_matrix;
577 quant_matrix = s->chroma_intra_matrix;
578 component = (n & 1) + 1;
580 diff = decode_dc(&s->gb, component);
582 return AVERROR_INVALIDDATA;
583 dc = s->last_dc[component];
585 s->last_dc[component] = dc;
586 block[0] = dc * (1 << (3 - s->intra_dc_precision));
588 if (s->intra_vlc_format)
594 OPEN_READER(re, &s->gb);
595 /* now quantify & encode AC coefficients */
597 UPDATE_CACHE(re, &s->gb);
598 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
601 if (level >= 64 || i > 63) {
603 } else if (level != 0) {
606 level = (level * qscale * quant_matrix[j]) >> 4;
607 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
608 SHOW_SBITS(re, &s->gb, 1);
609 LAST_SKIP_BITS(re, &s->gb, 1);
612 run = SHOW_UBITS(re, &s->gb, 6) + 1;
613 LAST_SKIP_BITS(re, &s->gb, 6);
614 UPDATE_CACHE(re, &s->gb);
615 level = SHOW_SBITS(re, &s->gb, 12);
616 SKIP_BITS(re, &s->gb, 12);
620 level = (-level * qscale * quant_matrix[j]) >> 4;
623 level = (level * qscale * quant_matrix[j]) >> 4;
629 CLOSE_READER(re, &s->gb);
632 check_scantable_index(s, i);
634 s->block_last_index[n] = i;
638 /******************************************/
641 static inline int get_dmv(MpegEncContext *s)
643 if (get_bits1(&s->gb))
644 return 1 - (get_bits1(&s->gb) << 1);
649 /* motion type (for MPEG-2) */
655 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
657 int i, j, k, cbp, val, mb_type, motion_type;
658 const int mb_block_count = 4 + (1 << s->chroma_format);
661 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
663 av_assert2(s->mb_skipped == 0);
665 if (s->mb_skip_run-- != 0) {
666 if (s->pict_type == AV_PICTURE_TYPE_P) {
668 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
669 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
674 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
676 // FIXME not sure if this is allowed in MPEG at all
677 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
678 if (IS_INTRA(mb_type)) {
679 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
680 return AVERROR_INVALIDDATA;
682 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
683 mb_type | MB_TYPE_SKIP;
685 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
692 switch (s->pict_type) {
694 case AV_PICTURE_TYPE_I:
695 if (get_bits1(&s->gb) == 0) {
696 if (get_bits1(&s->gb) == 0) {
697 av_log(s->avctx, AV_LOG_ERROR,
698 "Invalid mb type in I-frame at %d %d\n",
700 return AVERROR_INVALIDDATA;
702 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
704 mb_type = MB_TYPE_INTRA;
707 case AV_PICTURE_TYPE_P:
708 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
710 av_log(s->avctx, AV_LOG_ERROR,
711 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
712 return AVERROR_INVALIDDATA;
714 mb_type = ptype2mb_type[mb_type];
716 case AV_PICTURE_TYPE_B:
717 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
719 av_log(s->avctx, AV_LOG_ERROR,
720 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
721 return AVERROR_INVALIDDATA;
723 mb_type = btype2mb_type[mb_type];
726 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
727 // motion_type = 0; /* avoid warning */
728 if (IS_INTRA(mb_type)) {
729 s->bdsp.clear_blocks(s->block[0]);
731 if (!s->chroma_y_shift)
732 s->bdsp.clear_blocks(s->block[6]);
734 /* compute DCT type */
735 // FIXME: add an interlaced_dct coded var?
736 if (s->picture_structure == PICT_FRAME &&
737 !s->frame_pred_frame_dct)
738 s->interlaced_dct = get_bits1(&s->gb);
740 if (IS_QUANT(mb_type))
741 s->qscale = mpeg_get_qscale(s);
743 if (s->concealment_motion_vectors) {
744 /* just parse them */
745 if (s->picture_structure != PICT_FRAME)
746 skip_bits1(&s->gb); /* field select */
749 s->last_mv[0][0][0] =
750 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
751 s->last_mv[0][0][0]);
753 s->last_mv[0][0][1] =
754 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
755 s->last_mv[0][0][1]);
757 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
759 /* reset mv prediction */
760 memset(s->last_mv, 0, sizeof(s->last_mv));
763 // if 1, we memcpy blocks in xvmcvideo
764 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
765 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
767 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
768 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
769 for (i = 0; i < 6; i++)
770 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
772 for (i = 0; i < mb_block_count; i++)
773 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
777 for (i = 0; i < 6; i++) {
778 ret = ff_mpeg1_decode_block_intra(&s->gb,
780 s->intra_scantable.permutated,
781 s->last_dc, *s->pblocks[i],
784 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
789 s->block_last_index[i] = ret;
793 if (mb_type & MB_TYPE_ZERO_MV) {
794 av_assert2(mb_type & MB_TYPE_CBP);
796 s->mv_dir = MV_DIR_FORWARD;
797 if (s->picture_structure == PICT_FRAME) {
798 if (s->picture_structure == PICT_FRAME
799 && !s->frame_pred_frame_dct)
800 s->interlaced_dct = get_bits1(&s->gb);
801 s->mv_type = MV_TYPE_16X16;
803 s->mv_type = MV_TYPE_FIELD;
804 mb_type |= MB_TYPE_INTERLACED;
805 s->field_select[0][0] = s->picture_structure - 1;
808 if (IS_QUANT(mb_type))
809 s->qscale = mpeg_get_qscale(s);
811 s->last_mv[0][0][0] = 0;
812 s->last_mv[0][0][1] = 0;
813 s->last_mv[0][1][0] = 0;
814 s->last_mv[0][1][1] = 0;
818 av_assert2(mb_type & MB_TYPE_L0L1);
819 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
820 /* get additional motion vector type */
821 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
822 motion_type = MT_FRAME;
824 motion_type = get_bits(&s->gb, 2);
825 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
826 s->interlaced_dct = get_bits1(&s->gb);
829 if (IS_QUANT(mb_type))
830 s->qscale = mpeg_get_qscale(s);
833 s->mv_dir = (mb_type >> 13) & 3;
834 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
835 switch (motion_type) {
836 case MT_FRAME: /* or MT_16X8 */
837 if (s->picture_structure == PICT_FRAME) {
838 mb_type |= MB_TYPE_16x16;
839 s->mv_type = MV_TYPE_16X16;
840 for (i = 0; i < 2; i++) {
841 if (USES_LIST(mb_type, i)) {
844 s->last_mv[i][0][0] =
845 s->last_mv[i][1][0] =
846 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
847 s->last_mv[i][0][0]);
849 s->last_mv[i][0][1] =
850 s->last_mv[i][1][1] =
851 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
852 s->last_mv[i][0][1]);
853 /* full_pel: only for MPEG-1 */
854 if (s->full_pel[i]) {
861 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
862 s->mv_type = MV_TYPE_16X8;
863 for (i = 0; i < 2; i++) {
864 if (USES_LIST(mb_type, i)) {
866 for (j = 0; j < 2; j++) {
867 s->field_select[i][j] = get_bits1(&s->gb);
868 for (k = 0; k < 2; k++) {
869 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
870 s->last_mv[i][j][k]);
871 s->last_mv[i][j][k] = val;
872 s->mv[i][j][k] = val;
880 s->mv_type = MV_TYPE_FIELD;
881 if (s->picture_structure == PICT_FRAME) {
882 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
883 for (i = 0; i < 2; i++) {
884 if (USES_LIST(mb_type, i)) {
885 for (j = 0; j < 2; j++) {
886 s->field_select[i][j] = get_bits1(&s->gb);
887 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
888 s->last_mv[i][j][0]);
889 s->last_mv[i][j][0] = val;
890 s->mv[i][j][0] = val;
891 ff_tlog(s->avctx, "fmx=%d\n", val);
892 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
893 s->last_mv[i][j][1] >> 1);
894 s->last_mv[i][j][1] = 2 * val;
895 s->mv[i][j][1] = val;
896 ff_tlog(s->avctx, "fmy=%d\n", val);
901 av_assert0(!s->progressive_sequence);
902 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
903 for (i = 0; i < 2; i++) {
904 if (USES_LIST(mb_type, i)) {
905 s->field_select[i][0] = get_bits1(&s->gb);
906 for (k = 0; k < 2; k++) {
907 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
908 s->last_mv[i][0][k]);
909 s->last_mv[i][0][k] = val;
910 s->last_mv[i][1][k] = val;
911 s->mv[i][0][k] = val;
918 if (s->progressive_sequence){
919 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
920 return AVERROR_INVALIDDATA;
922 s->mv_type = MV_TYPE_DMV;
923 for (i = 0; i < 2; i++) {
924 if (USES_LIST(mb_type, i)) {
925 int dmx, dmy, mx, my, m;
926 const int my_shift = s->picture_structure == PICT_FRAME;
928 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
929 s->last_mv[i][0][0]);
930 s->last_mv[i][0][0] = mx;
931 s->last_mv[i][1][0] = mx;
933 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
934 s->last_mv[i][0][1] >> my_shift);
938 s->last_mv[i][0][1] = my * (1 << my_shift);
939 s->last_mv[i][1][1] = my * (1 << my_shift);
943 s->mv[i][1][0] = mx; // not used
944 s->mv[i][1][1] = my; // not used
946 if (s->picture_structure == PICT_FRAME) {
947 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
949 // m = 1 + 2 * s->top_field_first;
950 m = s->top_field_first ? 1 : 3;
952 /* top -> top pred */
953 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
954 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
956 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
957 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
959 mb_type |= MB_TYPE_16x16;
961 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
962 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
963 if (s->picture_structure == PICT_TOP_FIELD)
972 av_log(s->avctx, AV_LOG_ERROR,
973 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
974 return AVERROR_INVALIDDATA;
979 if (HAS_CBP(mb_type)) {
980 s->bdsp.clear_blocks(s->block[0]);
982 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
983 if (mb_block_count > 6) {
984 cbp *= 1 << mb_block_count - 6;
985 cbp |= get_bits(&s->gb, mb_block_count - 6);
986 s->bdsp.clear_blocks(s->block[6]);
989 av_log(s->avctx, AV_LOG_ERROR,
990 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
991 return AVERROR_INVALIDDATA;
994 // if 1, we memcpy blocks in xvmcvideo
995 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
996 ff_xvmc_pack_pblocks(s, cbp);
998 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
999 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1000 for (i = 0; i < 6; i++) {
1002 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1004 s->block_last_index[i] = -1;
1008 cbp <<= 12 - mb_block_count;
1010 for (i = 0; i < mb_block_count; i++) {
1011 if (cbp & (1 << 11)) {
1012 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1015 s->block_last_index[i] = -1;
1021 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1022 for (i = 0; i < 6; i++) {
1024 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1026 s->block_last_index[i] = -1;
1030 for (i = 0; i < 6; i++) {
1032 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1035 s->block_last_index[i] = -1;
1042 for (i = 0; i < 12; i++)
1043 s->block_last_index[i] = -1;
1047 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1052 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1054 Mpeg1Context *s = avctx->priv_data;
1055 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1057 ff_mpv_decode_defaults(s2);
1059 if ( avctx->codec_tag != AV_RL32("VCR2")
1060 && avctx->codec_tag != AV_RL32("BW10"))
1061 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1062 ff_mpv_decode_init(s2, avctx);
1064 s->mpeg_enc_ctx.avctx = avctx;
1066 /* we need some permutation to store matrices,
1067 * until the decoder sets the real permutation. */
1068 ff_mpv_idct_init(s2);
1069 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1070 ff_mpeg12_init_vlcs();
1072 s2->chroma_format = 1;
1073 s->mpeg_enc_ctx_allocated = 0;
1074 s->mpeg_enc_ctx.picture_number = 0;
1075 s->repeat_field = 0;
1076 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1077 avctx->color_range = AVCOL_RANGE_MPEG;
1082 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1083 const AVCodecContext *avctx_from)
1085 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1086 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1089 if (avctx == avctx_from ||
1090 !ctx_from->mpeg_enc_ctx_allocated ||
1091 !s1->context_initialized)
1094 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1098 if (!ctx->mpeg_enc_ctx_allocated)
1099 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1101 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1102 s->picture_number++;
1108 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1109 const uint8_t *new_perm)
1111 uint16_t temp_matrix[64];
1114 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1116 for (i = 0; i < 64; i++)
1117 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1120 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1121 #if CONFIG_MPEG1_NVDEC_HWACCEL
1124 #if CONFIG_MPEG1_XVMC_HWACCEL
1127 #if CONFIG_MPEG1_VDPAU_HWACCEL
1134 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1135 #if CONFIG_MPEG2_NVDEC_HWACCEL
1138 #if CONFIG_MPEG2_XVMC_HWACCEL
1141 #if CONFIG_MPEG2_VDPAU_HWACCEL
1144 #if CONFIG_MPEG2_DXVA2_HWACCEL
1145 AV_PIX_FMT_DXVA2_VLD,
1147 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1148 AV_PIX_FMT_D3D11VA_VLD,
1151 #if CONFIG_MPEG2_VAAPI_HWACCEL
1154 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1155 AV_PIX_FMT_VIDEOTOOLBOX,
1161 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1166 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1171 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1173 Mpeg1Context *s1 = avctx->priv_data;
1174 MpegEncContext *s = &s1->mpeg_enc_ctx;
1175 const enum AVPixelFormat *pix_fmts;
1177 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1178 return AV_PIX_FMT_GRAY8;
1180 if (s->chroma_format < 2)
1181 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1182 mpeg1_hwaccel_pixfmt_list_420 :
1183 mpeg2_hwaccel_pixfmt_list_420;
1184 else if (s->chroma_format == 2)
1185 pix_fmts = mpeg12_pixfmt_list_422;
1187 pix_fmts = mpeg12_pixfmt_list_444;
1189 return ff_thread_get_format(avctx, pix_fmts);
1192 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1194 // until then pix_fmt may be changed right after codec init
1196 if (avctx->idct_algo == FF_IDCT_AUTO)
1197 avctx->idct_algo = FF_IDCT_NONE;
1199 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1200 Mpeg1Context *s1 = avctx->priv_data;
1201 MpegEncContext *s = &s1->mpeg_enc_ctx;
1203 s->pack_pblocks = 1;
1207 /* Call this function when we know all parameters.
1208 * It may be called in different places for MPEG-1 and MPEG-2. */
1209 static int mpeg_decode_postinit(AVCodecContext *avctx)
1211 Mpeg1Context *s1 = avctx->priv_data;
1212 MpegEncContext *s = &s1->mpeg_enc_ctx;
1213 uint8_t old_permutation[64];
1216 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1218 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1219 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1222 if (s->aspect_ratio_info > 1) {
1224 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1225 (AVRational) { s1->pan_scan.width,
1226 s1->pan_scan.height }),
1227 (AVRational) { s->width, s->height });
1229 /* We ignore the spec here and guess a bit as reality does not
1230 * match the spec, see for example res_change_ffmpeg_aspect.ts
1231 * and sequence-display-aspect.mpg.
1232 * issue1613, 621, 562 */
1233 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1234 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1235 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1236 s->avctx->sample_aspect_ratio =
1237 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1238 (AVRational) { s->width, s->height });
1240 s->avctx->sample_aspect_ratio =
1241 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1242 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1243 // issue1613 4/3 16/9 -> 16/9
1244 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1245 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1246 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1247 ff_dlog(avctx, "aspect A %d/%d\n",
1248 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1249 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1250 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1251 s->avctx->sample_aspect_ratio.den);
1254 s->avctx->sample_aspect_ratio =
1255 ff_mpeg2_aspect[s->aspect_ratio_info];
1259 if (av_image_check_sar(s->width, s->height,
1260 avctx->sample_aspect_ratio) < 0) {
1261 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1262 avctx->sample_aspect_ratio.num,
1263 avctx->sample_aspect_ratio.den);
1264 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1267 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1268 avctx->coded_width != s->width ||
1269 avctx->coded_height != s->height ||
1270 s1->save_width != s->width ||
1271 s1->save_height != s->height ||
1272 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1273 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1275 if (s1->mpeg_enc_ctx_allocated) {
1276 ParseContext pc = s->parse_context;
1277 s->parse_context.buffer = 0;
1278 ff_mpv_common_end(s);
1279 s->parse_context = pc;
1280 s1->mpeg_enc_ctx_allocated = 0;
1283 ret = ff_set_dimensions(avctx, s->width, s->height);
1287 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1288 avctx->rc_max_rate = s->bit_rate;
1289 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1290 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1291 avctx->bit_rate = s->bit_rate;
1293 s1->save_aspect = s->avctx->sample_aspect_ratio;
1294 s1->save_width = s->width;
1295 s1->save_height = s->height;
1296 s1->save_progressive_seq = s->progressive_sequence;
1298 /* low_delay may be forced, in this case we will have B-frames
1299 * that behave like P-frames. */
1300 avctx->has_b_frames = !s->low_delay;
1302 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1304 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1305 avctx->ticks_per_frame = 1;
1307 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1310 av_reduce(&s->avctx->framerate.num,
1311 &s->avctx->framerate.den,
1312 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1313 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1315 avctx->ticks_per_frame = 2;
1317 switch (s->chroma_format) {
1318 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1320 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1321 default: av_assert0(0);
1325 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1326 setup_hwaccel_for_pixfmt(avctx);
1328 /* Quantization matrices may need reordering
1329 * if DCT permutation is changed. */
1330 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1332 ff_mpv_idct_init(s);
1333 if ((ret = ff_mpv_common_init(s)) < 0)
1336 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1337 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1338 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1339 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1341 s1->mpeg_enc_ctx_allocated = 1;
1346 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1349 Mpeg1Context *s1 = avctx->priv_data;
1350 MpegEncContext *s = &s1->mpeg_enc_ctx;
1351 int ref, f_code, vbv_delay;
1353 init_get_bits(&s->gb, buf, buf_size * 8);
1355 ref = get_bits(&s->gb, 10); /* temporal ref */
1356 s->pict_type = get_bits(&s->gb, 3);
1357 if (s->pict_type == 0 || s->pict_type > 3)
1358 return AVERROR_INVALIDDATA;
1360 vbv_delay = get_bits(&s->gb, 16);
1361 s->vbv_delay = vbv_delay;
1362 if (s->pict_type == AV_PICTURE_TYPE_P ||
1363 s->pict_type == AV_PICTURE_TYPE_B) {
1364 s->full_pel[0] = get_bits1(&s->gb);
1365 f_code = get_bits(&s->gb, 3);
1366 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1367 return AVERROR_INVALIDDATA;
1369 s->mpeg_f_code[0][0] = f_code;
1370 s->mpeg_f_code[0][1] = f_code;
1372 if (s->pict_type == AV_PICTURE_TYPE_B) {
1373 s->full_pel[1] = get_bits1(&s->gb);
1374 f_code = get_bits(&s->gb, 3);
1375 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1376 return AVERROR_INVALIDDATA;
1378 s->mpeg_f_code[1][0] = f_code;
1379 s->mpeg_f_code[1][1] = f_code;
1381 s->current_picture.f->pict_type = s->pict_type;
1382 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1384 if (avctx->debug & FF_DEBUG_PICT_INFO)
1385 av_log(avctx, AV_LOG_DEBUG,
1386 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1393 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1395 MpegEncContext *s = &s1->mpeg_enc_ctx;
1396 int horiz_size_ext, vert_size_ext;
1398 AVCPBProperties *cpb_props;
1400 skip_bits(&s->gb, 1); /* profile and level esc*/
1401 s->avctx->profile = get_bits(&s->gb, 3);
1402 s->avctx->level = get_bits(&s->gb, 4);
1403 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1404 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1406 if (!s->chroma_format) {
1407 s->chroma_format = 1;
1408 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1411 horiz_size_ext = get_bits(&s->gb, 2);
1412 vert_size_ext = get_bits(&s->gb, 2);
1413 s->width |= (horiz_size_ext << 12);
1414 s->height |= (vert_size_ext << 12);
1415 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1416 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1417 check_marker(s->avctx, &s->gb, "after bit rate extension");
1418 s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1420 s->low_delay = get_bits1(&s->gb);
1421 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1424 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1425 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1427 ff_dlog(s->avctx, "sequence extension\n");
1428 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1430 if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1431 cpb_props->buffer_size = s1->rc_buffer_size;
1432 if (s->bit_rate != 0x3FFFF*400)
1433 cpb_props->max_bitrate = s->bit_rate;
1436 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1437 av_log(s->avctx, AV_LOG_DEBUG,
1438 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1439 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1440 s1->rc_buffer_size, s->bit_rate);
1443 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1445 MpegEncContext *s = &s1->mpeg_enc_ctx;
1446 int color_description, w, h;
1448 skip_bits(&s->gb, 3); /* video format */
1449 color_description = get_bits1(&s->gb);
1450 if (color_description) {
1451 s->avctx->color_primaries = get_bits(&s->gb, 8);
1452 s->avctx->color_trc = get_bits(&s->gb, 8);
1453 s->avctx->colorspace = get_bits(&s->gb, 8);
1455 w = get_bits(&s->gb, 14);
1456 skip_bits(&s->gb, 1); // marker
1457 h = get_bits(&s->gb, 14);
1458 // remaining 3 bits are zero padding
1460 s1->pan_scan.width = 16 * w;
1461 s1->pan_scan.height = 16 * h;
1463 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1464 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1467 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1469 MpegEncContext *s = &s1->mpeg_enc_ctx;
1473 if (s->progressive_sequence) {
1474 if (s->repeat_first_field) {
1476 if (s->top_field_first)
1480 if (s->picture_structure == PICT_FRAME) {
1482 if (s->repeat_first_field)
1486 for (i = 0; i < nofco; i++) {
1487 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1488 skip_bits(&s->gb, 1); // marker
1489 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1490 skip_bits(&s->gb, 1); // marker
1493 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1494 av_log(s->avctx, AV_LOG_DEBUG,
1495 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1496 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1497 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1498 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1501 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1502 uint16_t matrix1[64], int intra)
1506 for (i = 0; i < 64; i++) {
1507 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1508 int v = get_bits(&s->gb, 8);
1510 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1511 return AVERROR_INVALIDDATA;
1513 if (intra && i == 0 && v != 8) {
1514 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1515 v = 8; // needed by pink.mpg / issue1046
1524 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1526 ff_dlog(s->avctx, "matrix extension\n");
1528 if (get_bits1(&s->gb))
1529 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1530 if (get_bits1(&s->gb))
1531 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1532 if (get_bits1(&s->gb))
1533 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1534 if (get_bits1(&s->gb))
1535 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1538 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1540 MpegEncContext *s = &s1->mpeg_enc_ctx;
1542 s->full_pel[0] = s->full_pel[1] = 0;
1543 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1544 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1545 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1546 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1547 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1548 av_log(s->avctx, AV_LOG_ERROR,
1549 "Missing picture start code, guessing missing values\n");
1550 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1551 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1552 s->pict_type = AV_PICTURE_TYPE_I;
1554 s->pict_type = AV_PICTURE_TYPE_P;
1556 s->pict_type = AV_PICTURE_TYPE_B;
1557 s->current_picture.f->pict_type = s->pict_type;
1558 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1560 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1561 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1562 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1563 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1565 s->intra_dc_precision = get_bits(&s->gb, 2);
1566 s->picture_structure = get_bits(&s->gb, 2);
1567 s->top_field_first = get_bits1(&s->gb);
1568 s->frame_pred_frame_dct = get_bits1(&s->gb);
1569 s->concealment_motion_vectors = get_bits1(&s->gb);
1570 s->q_scale_type = get_bits1(&s->gb);
1571 s->intra_vlc_format = get_bits1(&s->gb);
1572 s->alternate_scan = get_bits1(&s->gb);
1573 s->repeat_first_field = get_bits1(&s->gb);
1574 s->chroma_420_type = get_bits1(&s->gb);
1575 s->progressive_frame = get_bits1(&s->gb);
1577 if (s->alternate_scan) {
1578 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1579 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1581 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1582 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1585 /* composite display not parsed */
1586 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1587 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1588 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1589 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1590 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1591 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1592 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1593 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1594 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1597 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1599 AVCodecContext *avctx = s->avctx;
1600 Mpeg1Context *s1 = (Mpeg1Context *) s;
1603 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1604 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1605 return AVERROR_INVALIDDATA;
1608 /* start frame decoding */
1609 if (s->first_field || s->picture_structure == PICT_FRAME) {
1610 AVFrameSideData *pan_scan;
1612 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1615 ff_mpeg_er_frame_start(s);
1617 /* first check if we must repeat the frame */
1618 s->current_picture_ptr->f->repeat_pict = 0;
1619 if (s->repeat_first_field) {
1620 if (s->progressive_sequence) {
1621 if (s->top_field_first)
1622 s->current_picture_ptr->f->repeat_pict = 4;
1624 s->current_picture_ptr->f->repeat_pict = 2;
1625 } else if (s->progressive_frame) {
1626 s->current_picture_ptr->f->repeat_pict = 1;
1630 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1631 AV_FRAME_DATA_PANSCAN,
1632 sizeof(s1->pan_scan));
1634 return AVERROR(ENOMEM);
1635 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1637 if (s1->a53_buf_ref) {
1638 AVFrameSideData *sd = av_frame_new_side_data_from_buf(
1639 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1642 av_buffer_unref(&s1->a53_buf_ref);
1643 s1->a53_buf_ref = NULL;
1646 if (s1->has_stereo3d) {
1647 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1649 return AVERROR(ENOMEM);
1651 *stereo = s1->stereo3d;
1652 s1->has_stereo3d = 0;
1656 AVFrameSideData *sd =
1657 av_frame_new_side_data(s->current_picture_ptr->f,
1658 AV_FRAME_DATA_AFD, 1);
1660 return AVERROR(ENOMEM);
1662 *sd->data = s1->afd;
1666 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1667 ff_thread_finish_setup(avctx);
1668 } else { // second field
1671 if (!s->current_picture_ptr) {
1672 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1673 return AVERROR_INVALIDDATA;
1676 if (s->avctx->hwaccel) {
1677 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1678 av_log(avctx, AV_LOG_ERROR,
1679 "hardware accelerator failed to decode first field\n");
1684 for (i = 0; i < 4; i++) {
1685 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1686 if (s->picture_structure == PICT_BOTTOM_FIELD)
1687 s->current_picture.f->data[i] +=
1688 s->current_picture_ptr->f->linesize[i];
1692 if (avctx->hwaccel) {
1693 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1700 #define DECODE_SLICE_ERROR -1
1701 #define DECODE_SLICE_OK 0
1705 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1706 * @return DECODE_SLICE_ERROR if the slice is damaged,
1707 * DECODE_SLICE_OK if this slice is OK
1709 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1710 const uint8_t **buf, int buf_size)
1712 AVCodecContext *avctx = s->avctx;
1713 const int lowres = s->avctx->lowres;
1714 const int field_pic = s->picture_structure != PICT_FRAME;
1718 s->resync_mb_y = -1;
1720 av_assert0(mb_y < s->mb_height);
1722 init_get_bits(&s->gb, *buf, buf_size * 8);
1723 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1724 skip_bits(&s->gb, 3);
1726 ff_mpeg1_clean_buffers(s);
1727 s->interlaced_dct = 0;
1729 s->qscale = mpeg_get_qscale(s);
1731 if (s->qscale == 0) {
1732 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1733 return AVERROR_INVALIDDATA;
1736 /* extra slice info */
1737 if (skip_1stop_8data_bits(&s->gb) < 0)
1738 return AVERROR_INVALIDDATA;
1742 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1745 while (get_bits_left(&s->gb) > 0) {
1746 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1747 MBINCR_VLC_BITS, 2);
1749 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1750 return AVERROR_INVALIDDATA;
1755 /* otherwise, stuffing, nothing to do */
1763 if (s->mb_x >= (unsigned) s->mb_width) {
1764 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1765 return AVERROR_INVALIDDATA;
1768 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1769 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1770 int start_code = -1;
1771 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1772 if (buf_end < *buf + buf_size)
1775 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1776 return DECODE_SLICE_ERROR;
1778 return DECODE_SLICE_OK;
1781 s->resync_mb_x = s->mb_x;
1782 s->resync_mb_y = s->mb_y = mb_y;
1784 ff_init_block_index(s);
1786 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1787 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1788 av_log(s->avctx, AV_LOG_DEBUG,
1789 "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",
1791 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1792 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1793 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1794 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1795 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1796 s->progressive_sequence ? "ps" : "",
1797 s->progressive_frame ? "pf" : "",
1798 s->alternate_scan ? "alt" : "",
1799 s->top_field_first ? "top" : "",
1800 s->intra_dc_precision, s->picture_structure,
1801 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1802 s->q_scale_type, s->intra_vlc_format,
1803 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1808 // If 1, we memcpy blocks in xvmcvideo.
1809 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1810 ff_xvmc_init_block(s); // set s->block
1812 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1815 // Note motion_val is normally NULL unless we want to extract the MVs.
1816 if (s->current_picture.motion_val[0] && !s->encoding) {
1817 const int wrap = s->b8_stride;
1818 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1819 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1820 int motion_x, motion_y, dir, i;
1822 for (i = 0; i < 2; i++) {
1823 for (dir = 0; dir < 2; dir++) {
1825 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1826 motion_x = motion_y = 0;
1827 } else if (s->mv_type == MV_TYPE_16X16 ||
1828 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1829 motion_x = s->mv[dir][0][0];
1830 motion_y = s->mv[dir][0][1];
1831 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1832 motion_x = s->mv[dir][i][0];
1833 motion_y = s->mv[dir][i][1];
1836 s->current_picture.motion_val[dir][xy][0] = motion_x;
1837 s->current_picture.motion_val[dir][xy][1] = motion_y;
1838 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1839 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1840 s->current_picture.ref_index [dir][b8_xy] =
1841 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1842 av_assert2(s->field_select[dir][i] == 0 ||
1843 s->field_select[dir][i] == 1);
1850 s->dest[0] += 16 >> lowres;
1851 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1852 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1854 ff_mpv_reconstruct_mb(s, s->block);
1856 if (++s->mb_x >= s->mb_width) {
1857 const int mb_size = 16 >> s->avctx->lowres;
1860 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1861 ff_mpv_report_decode_progress(s);
1864 s->mb_y += 1 << field_pic;
1866 if (s->mb_y >= s->mb_height) {
1867 int left = get_bits_left(&s->gb);
1868 int is_d10 = s->chroma_format == 2 &&
1869 s->pict_type == AV_PICTURE_TYPE_I &&
1870 avctx->profile == 0 && avctx->level == 5 &&
1871 s->intra_dc_precision == 2 &&
1872 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1873 s->progressive_frame == 0
1874 /* vbv_delay == 0xBBB || 0xE10 */;
1876 if (left >= 32 && !is_d10) {
1877 GetBitContext gb = s->gb;
1878 align_get_bits(&gb);
1879 if (show_bits(&gb, 24) == 0x060E2B) {
1880 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1883 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1884 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1890 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1891 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1892 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1893 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1894 return AVERROR_INVALIDDATA;
1898 // There are some files out there which are missing the last slice
1899 // in cases where the slice is completely outside the visible
1900 // area, we detect this here instead of running into the end expecting
1902 left = get_bits_left(&s->gb);
1903 if (s->mb_y >= ((s->height + 15) >> 4) &&
1904 !s->progressive_sequence &&
1907 s->mb_skip_run == -1 &&
1908 (!left || show_bits(&s->gb, left) == 0))
1911 ff_init_block_index(s);
1914 /* skip mb handling */
1915 if (s->mb_skip_run == -1) {
1916 /* read increment again */
1919 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1920 MBINCR_VLC_BITS, 2);
1922 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1923 return AVERROR_INVALIDDATA;
1927 s->mb_skip_run += 33;
1928 } else if (code == 35) {
1929 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1930 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1931 return AVERROR_INVALIDDATA;
1933 goto eos; /* end of slice */
1935 /* otherwise, stuffing, nothing to do */
1937 s->mb_skip_run += code;
1941 if (s->mb_skip_run) {
1943 if (s->pict_type == AV_PICTURE_TYPE_I) {
1944 av_log(s->avctx, AV_LOG_ERROR,
1945 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1946 return AVERROR_INVALIDDATA;
1951 for (i = 0; i < 12; i++)
1952 s->block_last_index[i] = -1;
1953 if (s->picture_structure == PICT_FRAME)
1954 s->mv_type = MV_TYPE_16X16;
1956 s->mv_type = MV_TYPE_FIELD;
1957 if (s->pict_type == AV_PICTURE_TYPE_P) {
1958 /* if P type, zero motion vector is implied */
1959 s->mv_dir = MV_DIR_FORWARD;
1960 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1961 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1962 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1963 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1965 /* if B type, reuse previous vectors and directions */
1966 s->mv[0][0][0] = s->last_mv[0][0][0];
1967 s->mv[0][0][1] = s->last_mv[0][0][1];
1968 s->mv[1][0][0] = s->last_mv[1][0][0];
1969 s->mv[1][0][1] = s->last_mv[1][0][1];
1970 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1971 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1976 eos: // end of slice
1977 if (get_bits_left(&s->gb) < 0) {
1978 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1979 return AVERROR_INVALIDDATA;
1981 *buf += (get_bits_count(&s->gb) - 1) / 8;
1982 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);
1986 static int slice_decode_thread(AVCodecContext *c, void *arg)
1988 MpegEncContext *s = *(void **) arg;
1989 const uint8_t *buf = s->gb.buffer;
1990 int mb_y = s->start_mb_y;
1991 const int field_pic = s->picture_structure != PICT_FRAME;
1993 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1996 uint32_t start_code;
1999 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2001 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2002 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2003 s->start_mb_y, s->end_mb_y, s->er.error_count);
2005 if (c->err_recognition & AV_EF_EXPLODE)
2007 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2008 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2010 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2012 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2013 s->mb_x - 1, s->mb_y,
2014 ER_AC_END | ER_DC_END | ER_MV_END);
2017 if (s->mb_y == s->end_mb_y)
2021 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2022 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2023 return AVERROR_INVALIDDATA;
2024 mb_y = start_code - SLICE_MIN_START_CODE;
2025 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2026 mb_y += (*buf&0xE0)<<2;
2028 if (s->picture_structure == PICT_BOTTOM_FIELD)
2030 if (mb_y >= s->end_mb_y)
2031 return AVERROR_INVALIDDATA;
2036 * Handle slice ends.
2037 * @return 1 if it seems to be the last slice
2039 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2041 Mpeg1Context *s1 = avctx->priv_data;
2042 MpegEncContext *s = &s1->mpeg_enc_ctx;
2044 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2047 if (s->avctx->hwaccel) {
2048 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2050 av_log(avctx, AV_LOG_ERROR,
2051 "hardware accelerator failed to decode picture\n");
2056 /* end of slice reached */
2057 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2060 ff_er_frame_end(&s->er);
2062 ff_mpv_frame_end(s);
2064 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2065 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2068 ff_print_debug_info(s, s->current_picture_ptr, pict);
2069 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2071 if (avctx->active_thread_type & FF_THREAD_FRAME)
2072 s->picture_number++;
2073 /* latency of 1 frame for I- and P-frames */
2074 /* XXX: use another variable than picture_number */
2075 if (s->last_picture_ptr) {
2076 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2079 ff_print_debug_info(s, s->last_picture_ptr, pict);
2080 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2090 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2091 const uint8_t *buf, int buf_size)
2093 Mpeg1Context *s1 = avctx->priv_data;
2094 MpegEncContext *s = &s1->mpeg_enc_ctx;
2098 init_get_bits(&s->gb, buf, buf_size * 8);
2100 width = get_bits(&s->gb, 12);
2101 height = get_bits(&s->gb, 12);
2102 if (width == 0 || height == 0) {
2103 av_log(avctx, AV_LOG_WARNING,
2104 "Invalid horizontal or vertical size value.\n");
2105 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2106 return AVERROR_INVALIDDATA;
2108 s->aspect_ratio_info = get_bits(&s->gb, 4);
2109 if (s->aspect_ratio_info == 0) {
2110 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2111 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2112 return AVERROR_INVALIDDATA;
2114 s->frame_rate_index = get_bits(&s->gb, 4);
2115 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2116 av_log(avctx, AV_LOG_WARNING,
2117 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2118 s->frame_rate_index = 1;
2120 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2121 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2122 return AVERROR_INVALIDDATA;
2125 s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2126 skip_bits(&s->gb, 1);
2129 if (get_bits1(&s->gb)) {
2130 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2132 for (i = 0; i < 64; i++) {
2133 j = s->idsp.idct_permutation[i];
2134 v = ff_mpeg1_default_intra_matrix[i];
2135 s->intra_matrix[j] = v;
2136 s->chroma_intra_matrix[j] = v;
2139 if (get_bits1(&s->gb)) {
2140 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2142 for (i = 0; i < 64; i++) {
2143 int j = s->idsp.idct_permutation[i];
2144 v = ff_mpeg1_default_non_intra_matrix[i];
2145 s->inter_matrix[j] = v;
2146 s->chroma_inter_matrix[j] = v;
2150 if (show_bits(&s->gb, 23) != 0) {
2151 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2152 return AVERROR_INVALIDDATA;
2158 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2159 s->progressive_sequence = 1;
2160 s->progressive_frame = 1;
2161 s->picture_structure = PICT_FRAME;
2163 s->frame_pred_frame_dct = 1;
2164 s->chroma_format = 1;
2166 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2167 s->out_format = FMT_MPEG1;
2168 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2169 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2172 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2173 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2174 s1->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2179 static int vcr2_init_sequence(AVCodecContext *avctx)
2181 Mpeg1Context *s1 = avctx->priv_data;
2182 MpegEncContext *s = &s1->mpeg_enc_ctx;
2185 /* start new MPEG-1 context decoding */
2186 s->out_format = FMT_MPEG1;
2187 if (s1->mpeg_enc_ctx_allocated) {
2188 ff_mpv_common_end(s);
2189 s1->mpeg_enc_ctx_allocated = 0;
2191 s->width = avctx->coded_width;
2192 s->height = avctx->coded_height;
2193 avctx->has_b_frames = 0; // true?
2196 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2197 setup_hwaccel_for_pixfmt(avctx);
2199 ff_mpv_idct_init(s);
2200 if ((ret = ff_mpv_common_init(s)) < 0)
2202 s1->mpeg_enc_ctx_allocated = 1;
2204 for (i = 0; i < 64; i++) {
2205 int j = s->idsp.idct_permutation[i];
2206 v = ff_mpeg1_default_intra_matrix[i];
2207 s->intra_matrix[j] = v;
2208 s->chroma_intra_matrix[j] = v;
2210 v = ff_mpeg1_default_non_intra_matrix[i];
2211 s->inter_matrix[j] = v;
2212 s->chroma_inter_matrix[j] = v;
2215 s->progressive_sequence = 1;
2216 s->progressive_frame = 1;
2217 s->picture_structure = PICT_FRAME;
2219 s->frame_pred_frame_dct = 1;
2220 s->chroma_format = 1;
2221 if (s->codec_tag == AV_RL32("BW10")) {
2222 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2224 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2225 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2227 s1->save_width = s->width;
2228 s1->save_height = s->height;
2229 s1->save_progressive_seq = s->progressive_sequence;
2233 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2234 const uint8_t *p, int buf_size)
2236 Mpeg1Context *s1 = avctx->priv_data;
2238 if (buf_size >= 6 &&
2239 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2240 p[4] == 3 && (p[5] & 0x40)) {
2241 /* extract A53 Part 4 CC data */
2242 int cc_count = p[5] & 0x1f;
2243 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2244 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2245 const uint64_t new_size = (old_size + cc_count
2249 if (new_size > INT_MAX)
2250 return AVERROR(EINVAL);
2252 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2254 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
2256 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2259 } else if (buf_size >= 2 &&
2260 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2261 /* extract SCTE-20 CC data */
2266 init_get_bits(&gb, p + 2, buf_size - 2);
2267 cc_count = get_bits(&gb, 5);
2269 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2270 const uint64_t new_size = (old_size + cc_count
2272 if (new_size > INT_MAX)
2273 return AVERROR(EINVAL);
2275 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2277 uint8_t field, cc1, cc2;
2278 uint8_t *cap = s1->a53_buf_ref->data;
2280 memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3);
2281 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2282 skip_bits(&gb, 2); // priority
2283 field = get_bits(&gb, 2);
2284 skip_bits(&gb, 5); // line_offset
2285 cc1 = get_bits(&gb, 8);
2286 cc2 = get_bits(&gb, 8);
2287 skip_bits(&gb, 1); // marker
2289 if (!field) { // forbidden
2290 cap[0] = cap[1] = cap[2] = 0x00;
2292 field = (field == 2 ? 1 : 0);
2293 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2294 cap[0] = 0x04 | field;
2295 cap[1] = ff_reverse[cc1];
2296 cap[2] = ff_reverse[cc2];
2301 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2304 } else if (buf_size >= 11 &&
2305 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2306 /* extract DVD CC data
2308 * uint32_t user_data_start_code 0x000001B2 (big endian)
2309 * uint16_t user_identifier 0x4343 "CC"
2310 * uint8_t user_data_type_code 0x01
2311 * uint8_t caption_block_size 0xF8
2313 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2314 * bit 6 caption_filler 0
2315 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2316 * bit 0 caption_extra_field_added 1=one additional caption word
2318 * struct caption_field_block {
2320 * bit 7:1 caption_filler 0x7F (all 1s)
2321 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2322 * uint8_t caption_first_byte
2323 * uint8_t caption_second_byte
2324 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2326 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2327 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2328 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2329 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2330 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2333 // There is a caption count field in the data, but it is often
2334 // incorrect. So count the number of captions present.
2335 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2337 // Transform the DVD format into A53 Part 4 format
2339 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2340 const uint64_t new_size = (old_size + cc_count
2342 if (new_size > INT_MAX)
2343 return AVERROR(EINVAL);
2345 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2347 uint8_t field1 = !!(p[4] & 0x80);
2348 uint8_t *cap = s1->a53_buf_ref->data;
2350 for (i = 0; i < cc_count; i++) {
2351 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2354 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2361 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2368 static void mpeg_decode_user_data(AVCodecContext *avctx,
2369 const uint8_t *p, int buf_size)
2371 Mpeg1Context *s = avctx->priv_data;
2372 const uint8_t *buf_end = p + buf_size;
2373 Mpeg1Context *s1 = avctx->priv_data;
2377 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2378 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2380 av_log(avctx, AV_LOG_ERROR, "\n");
2386 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2390 /* we parse the DTG active format information */
2391 if (buf_end - p >= 5 &&
2392 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2400 if (buf_end - p < 1)
2403 s1->afd = p[0] & 0x0f;
2405 } else if (buf_end - p >= 6 &&
2406 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2407 p[4] == 0x03) { // S3D_video_format_length
2408 // the 0x7F mask ignores the reserved_bit value
2409 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2411 if (S3D_video_format_type == 0x03 ||
2412 S3D_video_format_type == 0x04 ||
2413 S3D_video_format_type == 0x08 ||
2414 S3D_video_format_type == 0x23) {
2416 s1->has_stereo3d = 1;
2418 switch (S3D_video_format_type) {
2420 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2423 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2426 s1->stereo3d.type = AV_STEREO3D_2D;
2429 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2433 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2438 static void mpeg_decode_gop(AVCodecContext *avctx,
2439 const uint8_t *buf, int buf_size)
2441 Mpeg1Context *s1 = avctx->priv_data;
2442 MpegEncContext *s = &s1->mpeg_enc_ctx;
2446 init_get_bits(&s->gb, buf, buf_size * 8);
2448 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2450 #if FF_API_PRIVATE_OPT
2451 FF_DISABLE_DEPRECATION_WARNINGS
2452 avctx->timecode_frame_start = tc;
2453 FF_ENABLE_DEPRECATION_WARNINGS
2456 s->closed_gop = get_bits1(&s->gb);
2457 /* broken_link indicates that after editing the
2458 * reference frames of the first B-Frames after GOP I-Frame
2459 * are missing (open gop) */
2460 broken_link = get_bits1(&s->gb);
2462 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2463 char tcbuf[AV_TIMECODE_STR_SIZE];
2464 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2465 av_log(s->avctx, AV_LOG_DEBUG,
2466 "GOP (%s) closed_gop=%d broken_link=%d\n",
2467 tcbuf, s->closed_gop, broken_link);
2471 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2472 int *got_output, const uint8_t *buf, int buf_size)
2474 Mpeg1Context *s = avctx->priv_data;
2475 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2476 const uint8_t *buf_ptr = buf;
2477 const uint8_t *buf_end = buf + buf_size;
2478 int ret, input_size;
2479 int last_code = 0, skip_frame = 0;
2480 int picture_start_code_seen = 0;
2483 /* find next start code */
2484 uint32_t start_code = -1;
2485 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2486 if (start_code > 0x1ff) {
2489 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2492 av_assert0(avctx->thread_count > 1);
2494 avctx->execute(avctx, slice_decode_thread,
2495 &s2->thread_context[0], NULL,
2496 s->slice_count, sizeof(void *));
2497 for (i = 0; i < s->slice_count; i++)
2498 s2->er.error_count += s2->thread_context[i]->er.error_count;
2501 ret = slice_end(avctx, picture);
2505 // FIXME: merge with the stuff in mpeg_decode_slice
2506 if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2512 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2513 return AVERROR_INVALIDDATA;
2515 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2518 input_size = buf_end - buf_ptr;
2520 if (avctx->debug & FF_DEBUG_STARTCODE)
2521 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2522 start_code, buf_ptr - buf, input_size);
2524 /* prepare data for next start code */
2525 switch (start_code) {
2526 case SEQ_START_CODE:
2527 if (last_code == 0) {
2528 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2529 if (buf != avctx->extradata)
2532 av_log(avctx, AV_LOG_ERROR,
2533 "ignoring SEQ_START_CODE after %X\n", last_code);
2534 if (avctx->err_recognition & AV_EF_EXPLODE)
2535 return AVERROR_INVALIDDATA;
2539 case PICTURE_START_CODE:
2540 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2541 /* If it's a frame picture, there can't be more than one picture header.
2542 Yet, it does happen and we need to handle it. */
2543 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2546 picture_start_code_seen = 1;
2548 if (s2->width <= 0 || s2->height <= 0) {
2549 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2550 s2->width, s2->height);
2551 return AVERROR_INVALIDDATA;
2555 s2->intra_dc_precision= 3;
2556 s2->intra_matrix[0]= 1;
2558 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2559 !avctx->hwaccel && s->slice_count) {
2562 avctx->execute(avctx, slice_decode_thread,
2563 s2->thread_context, NULL,
2564 s->slice_count, sizeof(void *));
2565 for (i = 0; i < s->slice_count; i++)
2566 s2->er.error_count += s2->thread_context[i]->er.error_count;
2569 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2570 ret = mpeg_decode_postinit(avctx);
2572 av_log(avctx, AV_LOG_ERROR,
2573 "mpeg_decode_postinit() failure\n");
2577 /* We have a complete image: we try to decompress it. */
2578 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2581 last_code = PICTURE_START_CODE;
2583 av_log(avctx, AV_LOG_ERROR,
2584 "ignoring pic after %X\n", last_code);
2585 if (avctx->err_recognition & AV_EF_EXPLODE)
2586 return AVERROR_INVALIDDATA;
2589 case EXT_START_CODE:
2590 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2592 switch (get_bits(&s2->gb, 4)) {
2594 if (last_code == 0) {
2595 mpeg_decode_sequence_extension(s);
2597 av_log(avctx, AV_LOG_ERROR,
2598 "ignoring seq ext after %X\n", last_code);
2599 if (avctx->err_recognition & AV_EF_EXPLODE)
2600 return AVERROR_INVALIDDATA;
2604 mpeg_decode_sequence_display_extension(s);
2607 mpeg_decode_quant_matrix_extension(s2);
2610 mpeg_decode_picture_display_extension(s);
2613 if (last_code == PICTURE_START_CODE) {
2614 mpeg_decode_picture_coding_extension(s);
2616 av_log(avctx, AV_LOG_ERROR,
2617 "ignoring pic cod ext after %X\n", last_code);
2618 if (avctx->err_recognition & AV_EF_EXPLODE)
2619 return AVERROR_INVALIDDATA;
2624 case USER_START_CODE:
2625 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2627 case GOP_START_CODE:
2628 if (last_code == 0) {
2629 s2->first_field = 0;
2630 mpeg_decode_gop(avctx, buf_ptr, input_size);
2633 av_log(avctx, AV_LOG_ERROR,
2634 "ignoring GOP_START_CODE after %X\n", last_code);
2635 if (avctx->err_recognition & AV_EF_EXPLODE)
2636 return AVERROR_INVALIDDATA;
2640 if (start_code >= SLICE_MIN_START_CODE &&
2641 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2642 if (s2->progressive_sequence && !s2->progressive_frame) {
2643 s2->progressive_frame = 1;
2644 av_log(s2->avctx, AV_LOG_ERROR,
2645 "interlaced frame in progressive sequence, ignoring\n");
2648 if (s2->picture_structure == 0 ||
2649 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2650 av_log(s2->avctx, AV_LOG_ERROR,
2651 "picture_structure %d invalid, ignoring\n",
2652 s2->picture_structure);
2653 s2->picture_structure = PICT_FRAME;
2656 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2657 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2659 if (s2->picture_structure == PICT_FRAME) {
2660 s2->first_field = 0;
2661 s2->v_edge_pos = 16 * s2->mb_height;
2663 s2->first_field ^= 1;
2664 s2->v_edge_pos = 8 * s2->mb_height;
2665 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2668 if (start_code >= SLICE_MIN_START_CODE &&
2669 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2670 const int field_pic = s2->picture_structure != PICT_FRAME;
2671 int mb_y = start_code - SLICE_MIN_START_CODE;
2672 last_code = SLICE_MIN_START_CODE;
2673 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2674 mb_y += (*buf_ptr&0xE0)<<2;
2677 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2680 if (buf_end - buf_ptr < 2) {
2681 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2682 return AVERROR_INVALIDDATA;
2685 if (mb_y >= s2->mb_height) {
2686 av_log(s2->avctx, AV_LOG_ERROR,
2687 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2688 return AVERROR_INVALIDDATA;
2691 if (!s2->last_picture_ptr) {
2692 /* Skip B-frames if we do not have reference frames and
2693 * GOP is not closed. */
2694 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2695 if (!s2->closed_gop) {
2697 av_log(s2->avctx, AV_LOG_DEBUG,
2698 "Skipping B slice due to open GOP\n");
2703 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2705 if (!s2->next_picture_ptr) {
2706 /* Skip P-frames if we do not have a reference frame or
2707 * we have an invalid header. */
2708 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2710 av_log(s2->avctx, AV_LOG_DEBUG,
2711 "Skipping P slice due to !sync\n");
2715 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2716 s2->pict_type == AV_PICTURE_TYPE_B) ||
2717 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2718 s2->pict_type != AV_PICTURE_TYPE_I) ||
2719 avctx->skip_frame >= AVDISCARD_ALL) {
2724 if (!s->mpeg_enc_ctx_allocated)
2727 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2728 if (mb_y < avctx->skip_top ||
2729 mb_y >= s2->mb_height - avctx->skip_bottom)
2733 if (!s2->pict_type) {
2734 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2735 if (avctx->err_recognition & AV_EF_EXPLODE)
2736 return AVERROR_INVALIDDATA;
2740 if (s->first_slice) {
2743 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2746 if (!s2->current_picture_ptr) {
2747 av_log(avctx, AV_LOG_ERROR,
2748 "current_picture not initialized\n");
2749 return AVERROR_INVALIDDATA;
2753 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2755 int threshold = (s2->mb_height * s->slice_count +
2756 s2->slice_context_count / 2) /
2757 s2->slice_context_count;
2758 av_assert0(avctx->thread_count > 1);
2759 if (threshold <= mb_y) {
2760 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2762 thread_context->start_mb_y = mb_y;
2763 thread_context->end_mb_y = s2->mb_height;
2764 if (s->slice_count) {
2765 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2766 ret = ff_update_duplicate_context(thread_context, s2);
2770 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2773 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2775 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2779 if (avctx->err_recognition & AV_EF_EXPLODE)
2781 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2782 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2783 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2784 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2786 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2787 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2788 ER_AC_END | ER_DC_END | ER_MV_END);
2797 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2798 int *got_output, AVPacket *avpkt)
2800 const uint8_t *buf = avpkt->data;
2802 int buf_size = avpkt->size;
2803 Mpeg1Context *s = avctx->priv_data;
2804 AVFrame *picture = data;
2805 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2807 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2808 /* special case for last picture */
2809 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2810 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2814 s2->next_picture_ptr = NULL;
2821 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2822 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2825 if (ff_combine_frame(&s2->parse_context, next,
2826 (const uint8_t **) &buf, &buf_size) < 0)
2830 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2831 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2832 || s2->codec_tag == AV_RL32("BW10")
2834 vcr2_init_sequence(avctx);
2838 if (avctx->extradata && !s->extradata_decoded) {
2839 ret = decode_chunks(avctx, picture, got_output,
2840 avctx->extradata, avctx->extradata_size);
2842 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2843 av_frame_unref(picture);
2846 s->extradata_decoded = 1;
2847 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2848 s2->current_picture_ptr = NULL;
2853 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2854 if (ret<0 || *got_output) {
2855 s2->current_picture_ptr = NULL;
2857 if (s2->timecode_frame_start != -1 && *got_output) {
2858 char tcbuf[AV_TIMECODE_STR_SIZE];
2859 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2860 AV_FRAME_DATA_GOP_TIMECODE,
2863 return AVERROR(ENOMEM);
2864 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2866 av_timecode_make_mpeg_tc_string(tcbuf, s2->timecode_frame_start);
2867 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2869 s2->timecode_frame_start = -1;
2876 static void flush(AVCodecContext *avctx)
2878 Mpeg1Context *s = avctx->priv_data;
2882 ff_mpeg_flush(avctx);
2885 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2887 Mpeg1Context *s = avctx->priv_data;
2889 ff_mpv_common_end(&s->mpeg_enc_ctx);
2890 av_buffer_unref(&s->a53_buf_ref);
2894 AVCodec ff_mpeg1video_decoder = {
2895 .name = "mpeg1video",
2896 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2897 .type = AVMEDIA_TYPE_VIDEO,
2898 .id = AV_CODEC_ID_MPEG1VIDEO,
2899 .priv_data_size = sizeof(Mpeg1Context),
2900 .init = mpeg_decode_init,
2901 .close = mpeg_decode_end,
2902 .decode = mpeg_decode_frame,
2903 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2904 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2905 AV_CODEC_CAP_SLICE_THREADS,
2906 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2909 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2910 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2911 #if CONFIG_MPEG1_NVDEC_HWACCEL
2912 HWACCEL_NVDEC(mpeg1),
2914 #if CONFIG_MPEG1_VDPAU_HWACCEL
2915 HWACCEL_VDPAU(mpeg1),
2917 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2918 HWACCEL_VIDEOTOOLBOX(mpeg1),
2920 #if CONFIG_MPEG1_XVMC_HWACCEL
2921 HWACCEL_XVMC(mpeg1),
2927 AVCodec ff_mpeg2video_decoder = {
2928 .name = "mpeg2video",
2929 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2930 .type = AVMEDIA_TYPE_VIDEO,
2931 .id = AV_CODEC_ID_MPEG2VIDEO,
2932 .priv_data_size = sizeof(Mpeg1Context),
2933 .init = mpeg_decode_init,
2934 .close = mpeg_decode_end,
2935 .decode = mpeg_decode_frame,
2936 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2937 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2938 AV_CODEC_CAP_SLICE_THREADS,
2939 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2942 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2943 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2944 #if CONFIG_MPEG2_DXVA2_HWACCEL
2945 HWACCEL_DXVA2(mpeg2),
2947 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2948 HWACCEL_D3D11VA(mpeg2),
2950 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2951 HWACCEL_D3D11VA2(mpeg2),
2953 #if CONFIG_MPEG2_NVDEC_HWACCEL
2954 HWACCEL_NVDEC(mpeg2),
2956 #if CONFIG_MPEG2_VAAPI_HWACCEL
2957 HWACCEL_VAAPI(mpeg2),
2959 #if CONFIG_MPEG2_VDPAU_HWACCEL
2960 HWACCEL_VDPAU(mpeg2),
2962 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2963 HWACCEL_VIDEOTOOLBOX(mpeg2),
2965 #if CONFIG_MPEG2_XVMC_HWACCEL
2966 HWACCEL_XVMC(mpeg2),
2973 AVCodec ff_mpegvideo_decoder = {
2974 .name = "mpegvideo",
2975 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2976 .type = AVMEDIA_TYPE_VIDEO,
2977 .id = AV_CODEC_ID_MPEG2VIDEO,
2978 .priv_data_size = sizeof(Mpeg1Context),
2979 .init = mpeg_decode_init,
2980 .close = mpeg_decode_end,
2981 .decode = mpeg_decode_frame,
2982 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2983 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP,
2988 typedef struct IPUContext {
2992 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2995 static int ipu_decode_frame(AVCodecContext *avctx, void *data,
2996 int *got_frame, AVPacket *avpkt)
2998 IPUContext *s = avctx->priv_data;
2999 MpegEncContext *m = &s->m;
3000 GetBitContext *gb = &m->gb;
3001 AVFrame * const frame = data;
3004 ret = ff_get_buffer(avctx, frame, 0);
3008 ret = init_get_bits8(gb, avpkt->data, avpkt->size);
3012 s->flags = get_bits(gb, 8);
3013 m->intra_dc_precision = s->flags & 3;
3014 m->q_scale_type = !!(s->flags & 0x40);
3015 m->intra_vlc_format = !!(s->flags & 0x20);
3016 m->alternate_scan = !!(s->flags & 0x10);
3018 if (s->flags & 0x10) {
3019 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_alternate_vertical_scan);
3020 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_alternate_vertical_scan);
3022 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_zigzag_direct);
3023 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_zigzag_direct);
3026 m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
3029 for (int y = 0; y < avctx->height; y += 16) {
3032 for (int x = 0; x < avctx->width; x += 16) {
3035 return AVERROR_INVALIDDATA;
3037 if (get_bits1(gb)) {
3041 return AVERROR_INVALIDDATA;
3049 m->qscale = mpeg_get_qscale(m);
3051 memset(s->block, 0, sizeof(s->block));
3053 for (int n = 0; n < 6; n++) {
3054 if (s->flags & 0x80) {
3055 ret = ff_mpeg1_decode_block_intra(&m->gb,
3057 m->intra_scantable.permutated,
3058 m->last_dc, s->block[n],
3061 m->block_last_index[n] = ret;
3063 ret = mpeg2_decode_block_intra(m, s->block[n], n);
3070 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
3071 frame->linesize[0], s->block[0]);
3072 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
3073 frame->linesize[0], s->block[1]);
3074 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
3075 frame->linesize[0], s->block[2]);
3076 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
3077 frame->linesize[0], s->block[3]);
3078 m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
3079 frame->linesize[1], s->block[4]);
3080 m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
3081 frame->linesize[2], s->block[5]);
3086 if (get_bits_left(gb) != 32)
3087 return AVERROR_INVALIDDATA;
3089 frame->pict_type = AV_PICTURE_TYPE_I;
3090 frame->key_frame = 1;
3096 static av_cold int ipu_decode_init(AVCodecContext *avctx)
3098 IPUContext *s = avctx->priv_data;
3099 MpegEncContext *m = &s->m;
3101 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3103 ff_mpv_decode_defaults(m);
3104 ff_mpv_decode_init(m, avctx);
3106 ff_mpv_idct_init(m);
3107 ff_mpeg12_common_init(m);
3108 ff_mpeg12_init_vlcs();
3110 for (int i = 0; i < 64; i++) {
3111 int j = m->idsp.idct_permutation[i];
3112 int v = ff_mpeg1_default_intra_matrix[i];
3113 m->intra_matrix[j] = v;
3114 m->chroma_intra_matrix[j] = v;
3117 for (int i = 0; i < 64; i++) {
3118 int j = m->idsp.idct_permutation[i];
3119 int v = ff_mpeg1_default_non_intra_matrix[i];
3120 m->inter_matrix[j] = v;
3121 m->chroma_inter_matrix[j] = v;
3127 static av_cold int ipu_decode_end(AVCodecContext *avctx)
3129 IPUContext *s = avctx->priv_data;
3131 ff_mpv_common_end(&s->m);
3136 AVCodec ff_ipu_decoder = {
3138 .long_name = NULL_IF_CONFIG_SMALL("IPU Video"),
3139 .type = AVMEDIA_TYPE_VIDEO,
3140 .id = AV_CODEC_ID_IPU,
3141 .priv_data_size = sizeof(IPUContext),
3142 .init = ipu_decode_init,
3143 .decode = ipu_decode_frame,
3144 .close = ipu_decode_end,
3145 .capabilities = AV_CODEC_CAP_DR1,
3146 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,