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 */
65 AVRational save_aspect;
66 int save_width, save_height, save_progressive_seq;
67 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
68 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
71 int extradata_decoded;
74 #define MB_TYPE_ZERO_MV 0x20000000
76 static const uint32_t ptype2mb_type[7] = {
78 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
80 MB_TYPE_L0 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_INTRA,
82 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
83 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
86 static const uint32_t btype2mb_type[11] = {
89 MB_TYPE_L1 | MB_TYPE_CBP,
91 MB_TYPE_L0 | MB_TYPE_CBP,
93 MB_TYPE_L0L1 | MB_TYPE_CBP,
94 MB_TYPE_QUANT | MB_TYPE_INTRA,
95 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
96 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
97 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
100 /* as H.263, but only 17 codes */
101 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
103 int code, sign, val, shift;
105 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
111 sign = get_bits1(&s->gb);
115 val = (val - 1) << shift;
116 val |= get_bits(&s->gb, shift);
123 /* modulo decoding */
124 return sign_extend(val, 5 + shift);
127 #define 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 * Note: this function can read out of range and crash for corrupt streams.
224 * Changing this would eat up any speed benefits it has.
225 * Do not use "fast" flag if you need the code to be robust.
227 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
228 int16_t *block, int n)
230 int level, i, j, run;
231 RLTable *rl = &ff_rl_mpeg1;
232 uint8_t *const scantable = s->intra_scantable.permutated;
233 const int qscale = s->qscale;
236 OPEN_READER(re, &s->gb);
238 // Special case for first coefficient, no need to add second VLC table.
239 UPDATE_CACHE(re, &s->gb);
240 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
241 level = (3 * qscale) >> 1;
242 level = (level - 1) | 1;
243 if (GET_CACHE(re, &s->gb) & 0x40000000)
247 SKIP_BITS(re, &s->gb, 2);
248 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
252 /* now quantify & encode AC coefficients */
254 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
262 level = ((level * 2 + 1) * qscale) >> 1;
263 level = (level - 1) | 1;
264 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
265 SHOW_SBITS(re, &s->gb, 1);
266 SKIP_BITS(re, &s->gb, 1);
269 run = SHOW_UBITS(re, &s->gb, 6) + 1;
270 LAST_SKIP_BITS(re, &s->gb, 6);
271 UPDATE_CACHE(re, &s->gb);
272 level = SHOW_SBITS(re, &s->gb, 8);
273 SKIP_BITS(re, &s->gb, 8);
275 level = SHOW_UBITS(re, &s->gb, 8) - 256;
276 SKIP_BITS(re, &s->gb, 8);
277 } else if (level == 0) {
278 level = SHOW_UBITS(re, &s->gb, 8);
279 SKIP_BITS(re, &s->gb, 8);
287 level = ((level * 2 + 1) * qscale) >> 1;
288 level = (level - 1) | 1;
291 level = ((level * 2 + 1) * qscale) >> 1;
292 level = (level - 1) | 1;
297 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
299 UPDATE_CACHE(re, &s->gb);
302 LAST_SKIP_BITS(re, &s->gb, 2);
303 CLOSE_READER(re, &s->gb);
306 check_scantable_index(s, i);
308 s->block_last_index[n] = i;
312 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
313 int16_t *block, int n)
315 int level, i, j, run;
316 RLTable *rl = &ff_rl_mpeg1;
317 uint8_t *const scantable = s->intra_scantable.permutated;
318 const uint16_t *quant_matrix;
319 const int qscale = s->qscale;
325 OPEN_READER(re, &s->gb);
328 quant_matrix = s->inter_matrix;
330 quant_matrix = s->chroma_inter_matrix;
332 // Special case for first coefficient, no need to add second VLC table.
333 UPDATE_CACHE(re, &s->gb);
334 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
335 level = (3 * qscale * quant_matrix[0]) >> 5;
336 if (GET_CACHE(re, &s->gb) & 0x40000000)
341 SKIP_BITS(re, &s->gb, 2);
342 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
346 /* now quantify & encode AC coefficients */
348 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
356 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
357 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
358 SHOW_SBITS(re, &s->gb, 1);
359 SKIP_BITS(re, &s->gb, 1);
362 run = SHOW_UBITS(re, &s->gb, 6) + 1;
363 LAST_SKIP_BITS(re, &s->gb, 6);
364 UPDATE_CACHE(re, &s->gb);
365 level = SHOW_SBITS(re, &s->gb, 12);
366 SKIP_BITS(re, &s->gb, 12);
373 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
376 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
382 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
384 UPDATE_CACHE(re, &s->gb);
387 LAST_SKIP_BITS(re, &s->gb, 2);
388 CLOSE_READER(re, &s->gb);
390 block[63] ^= (mismatch & 1);
392 check_scantable_index(s, i);
394 s->block_last_index[n] = i;
399 * Note: this function can read out of range and crash for corrupt streams.
400 * Changing this would eat up any speed benefits it has.
401 * Do not use "fast" flag if you need the code to be robust.
403 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
404 int16_t *block, int n)
406 int level, i, j, run;
407 RLTable *rl = &ff_rl_mpeg1;
408 uint8_t *const scantable = s->intra_scantable.permutated;
409 const int qscale = s->qscale;
410 OPEN_READER(re, &s->gb);
413 // special case for first coefficient, no need to add second VLC table
414 UPDATE_CACHE(re, &s->gb);
415 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
416 level = (3 * qscale) >> 1;
417 if (GET_CACHE(re, &s->gb) & 0x40000000)
421 SKIP_BITS(re, &s->gb, 2);
422 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
426 /* now quantify & encode AC coefficients */
428 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
435 level = ((level * 2 + 1) * qscale) >> 1;
436 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
437 SHOW_SBITS(re, &s->gb, 1);
438 SKIP_BITS(re, &s->gb, 1);
441 run = SHOW_UBITS(re, &s->gb, 6) + 1;
442 LAST_SKIP_BITS(re, &s->gb, 6);
443 UPDATE_CACHE(re, &s->gb);
444 level = SHOW_SBITS(re, &s->gb, 12);
445 SKIP_BITS(re, &s->gb, 12);
452 level = ((-level * 2 + 1) * qscale) >> 1;
455 level = ((level * 2 + 1) * qscale) >> 1;
460 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
463 UPDATE_CACHE(re, &s->gb);
466 LAST_SKIP_BITS(re, &s->gb, 2);
467 CLOSE_READER(re, &s->gb);
469 check_scantable_index(s, i);
471 s->block_last_index[n] = i;
475 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
476 int16_t *block, int n)
478 int level, dc, diff, i, j, run;
481 uint8_t *const scantable = s->intra_scantable.permutated;
482 const uint16_t *quant_matrix;
483 const int qscale = s->qscale;
488 quant_matrix = s->intra_matrix;
491 quant_matrix = s->chroma_intra_matrix;
492 component = (n & 1) + 1;
494 diff = decode_dc(&s->gb, component);
496 return AVERROR_INVALIDDATA;
497 dc = s->last_dc[component];
499 s->last_dc[component] = dc;
500 block[0] = dc * (1 << (3 - s->intra_dc_precision));
501 ff_tlog(s->avctx, "dc=%d\n", block[0]);
502 mismatch = block[0] ^ 1;
504 if (s->intra_vlc_format)
510 OPEN_READER(re, &s->gb);
511 /* now quantify & encode AC coefficients */
513 UPDATE_CACHE(re, &s->gb);
514 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
519 } else if (level != 0) {
524 level = (level * qscale * quant_matrix[j]) >> 4;
525 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
526 SHOW_SBITS(re, &s->gb, 1);
527 LAST_SKIP_BITS(re, &s->gb, 1);
530 run = SHOW_UBITS(re, &s->gb, 6) + 1;
531 LAST_SKIP_BITS(re, &s->gb, 6);
532 UPDATE_CACHE(re, &s->gb);
533 level = SHOW_SBITS(re, &s->gb, 12);
534 SKIP_BITS(re, &s->gb, 12);
540 level = (-level * qscale * quant_matrix[j]) >> 4;
543 level = (level * qscale * quant_matrix[j]) >> 4;
550 CLOSE_READER(re, &s->gb);
552 block[63] ^= mismatch & 1;
554 check_scantable_index(s, i);
556 s->block_last_index[n] = i;
561 * Note: this function can read out of range and crash for corrupt streams.
562 * Changing this would eat up any speed benefits it has.
563 * Do not use "fast" flag if you need the code to be robust.
565 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
566 int16_t *block, int n)
568 int level, dc, diff, i, j, run;
571 uint8_t *const scantable = s->intra_scantable.permutated;
572 const uint16_t *quant_matrix;
573 const int qscale = s->qscale;
577 quant_matrix = s->intra_matrix;
580 quant_matrix = s->chroma_intra_matrix;
581 component = (n & 1) + 1;
583 diff = decode_dc(&s->gb, component);
585 return AVERROR_INVALIDDATA;
586 dc = s->last_dc[component];
588 s->last_dc[component] = dc;
589 block[0] = dc << (3 - s->intra_dc_precision);
591 if (s->intra_vlc_format)
597 OPEN_READER(re, &s->gb);
598 /* now quantify & encode AC coefficients */
600 UPDATE_CACHE(re, &s->gb);
601 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
604 if (level >= 64 || i > 63) {
606 } else if (level != 0) {
609 level = (level * qscale * quant_matrix[j]) >> 4;
610 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
611 SHOW_SBITS(re, &s->gb, 1);
612 LAST_SKIP_BITS(re, &s->gb, 1);
615 run = SHOW_UBITS(re, &s->gb, 6) + 1;
616 LAST_SKIP_BITS(re, &s->gb, 6);
617 UPDATE_CACHE(re, &s->gb);
618 level = SHOW_SBITS(re, &s->gb, 12);
619 SKIP_BITS(re, &s->gb, 12);
623 level = (-level * qscale * quant_matrix[j]) >> 4;
626 level = (level * qscale * quant_matrix[j]) >> 4;
632 CLOSE_READER(re, &s->gb);
635 check_scantable_index(s, i);
637 s->block_last_index[n] = i;
641 /******************************************/
644 static inline int get_dmv(MpegEncContext *s)
646 if (get_bits1(&s->gb))
647 return 1 - (get_bits1(&s->gb) << 1);
652 static inline int get_qscale(MpegEncContext *s)
654 int qscale = get_bits(&s->gb, 5);
656 return ff_mpeg2_non_linear_qscale[qscale];
662 /* motion type (for MPEG-2) */
668 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
670 int i, j, k, cbp, val, mb_type, motion_type;
671 const int mb_block_count = 4 + (1 << s->chroma_format);
674 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
676 av_assert2(s->mb_skipped == 0);
678 if (s->mb_skip_run-- != 0) {
679 if (s->pict_type == AV_PICTURE_TYPE_P) {
681 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
682 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
687 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
689 // FIXME not sure if this is allowed in MPEG at all
690 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
691 if (IS_INTRA(mb_type)) {
692 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
693 return AVERROR_INVALIDDATA;
695 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
696 mb_type | MB_TYPE_SKIP;
698 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
705 switch (s->pict_type) {
707 case AV_PICTURE_TYPE_I:
708 if (get_bits1(&s->gb) == 0) {
709 if (get_bits1(&s->gb) == 0) {
710 av_log(s->avctx, AV_LOG_ERROR,
711 "Invalid mb type in I-frame at %d %d\n",
713 return AVERROR_INVALIDDATA;
715 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
717 mb_type = MB_TYPE_INTRA;
720 case AV_PICTURE_TYPE_P:
721 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
723 av_log(s->avctx, AV_LOG_ERROR,
724 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
725 return AVERROR_INVALIDDATA;
727 mb_type = ptype2mb_type[mb_type];
729 case AV_PICTURE_TYPE_B:
730 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
732 av_log(s->avctx, AV_LOG_ERROR,
733 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
734 return AVERROR_INVALIDDATA;
736 mb_type = btype2mb_type[mb_type];
739 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
740 // motion_type = 0; /* avoid warning */
741 if (IS_INTRA(mb_type)) {
742 s->bdsp.clear_blocks(s->block[0]);
744 if (!s->chroma_y_shift)
745 s->bdsp.clear_blocks(s->block[6]);
747 /* compute DCT type */
748 // FIXME: add an interlaced_dct coded var?
749 if (s->picture_structure == PICT_FRAME &&
750 !s->frame_pred_frame_dct)
751 s->interlaced_dct = get_bits1(&s->gb);
753 if (IS_QUANT(mb_type))
754 s->qscale = get_qscale(s);
756 if (s->concealment_motion_vectors) {
757 /* just parse them */
758 if (s->picture_structure != PICT_FRAME)
759 skip_bits1(&s->gb); /* field select */
762 s->last_mv[0][0][0] =
763 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
764 s->last_mv[0][0][0]);
766 s->last_mv[0][0][1] =
767 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
768 s->last_mv[0][0][1]);
770 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
772 /* reset mv prediction */
773 memset(s->last_mv, 0, sizeof(s->last_mv));
776 // if 1, we memcpy blocks in xvmcvideo
777 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
778 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
780 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
781 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
782 for (i = 0; i < 6; i++)
783 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
785 for (i = 0; i < mb_block_count; i++)
786 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
790 for (i = 0; i < 6; i++) {
791 ret = ff_mpeg1_decode_block_intra(&s->gb,
793 s->intra_scantable.permutated,
794 s->last_dc, *s->pblocks[i],
797 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
802 s->block_last_index[i] = ret;
806 if (mb_type & MB_TYPE_ZERO_MV) {
807 av_assert2(mb_type & MB_TYPE_CBP);
809 s->mv_dir = MV_DIR_FORWARD;
810 if (s->picture_structure == PICT_FRAME) {
811 if (s->picture_structure == PICT_FRAME
812 && !s->frame_pred_frame_dct)
813 s->interlaced_dct = get_bits1(&s->gb);
814 s->mv_type = MV_TYPE_16X16;
816 s->mv_type = MV_TYPE_FIELD;
817 mb_type |= MB_TYPE_INTERLACED;
818 s->field_select[0][0] = s->picture_structure - 1;
821 if (IS_QUANT(mb_type))
822 s->qscale = get_qscale(s);
824 s->last_mv[0][0][0] = 0;
825 s->last_mv[0][0][1] = 0;
826 s->last_mv[0][1][0] = 0;
827 s->last_mv[0][1][1] = 0;
831 av_assert2(mb_type & MB_TYPE_L0L1);
832 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
833 /* get additional motion vector type */
834 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
835 motion_type = MT_FRAME;
837 motion_type = get_bits(&s->gb, 2);
838 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
839 s->interlaced_dct = get_bits1(&s->gb);
842 if (IS_QUANT(mb_type))
843 s->qscale = get_qscale(s);
846 s->mv_dir = (mb_type >> 13) & 3;
847 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
848 switch (motion_type) {
849 case MT_FRAME: /* or MT_16X8 */
850 if (s->picture_structure == PICT_FRAME) {
851 mb_type |= MB_TYPE_16x16;
852 s->mv_type = MV_TYPE_16X16;
853 for (i = 0; i < 2; i++) {
854 if (USES_LIST(mb_type, i)) {
857 s->last_mv[i][0][0] =
858 s->last_mv[i][1][0] =
859 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
860 s->last_mv[i][0][0]);
862 s->last_mv[i][0][1] =
863 s->last_mv[i][1][1] =
864 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
865 s->last_mv[i][0][1]);
866 /* full_pel: only for MPEG-1 */
867 if (s->full_pel[i]) {
874 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
875 s->mv_type = MV_TYPE_16X8;
876 for (i = 0; i < 2; i++) {
877 if (USES_LIST(mb_type, i)) {
879 for (j = 0; j < 2; j++) {
880 s->field_select[i][j] = get_bits1(&s->gb);
881 for (k = 0; k < 2; k++) {
882 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
883 s->last_mv[i][j][k]);
884 s->last_mv[i][j][k] = val;
885 s->mv[i][j][k] = val;
893 s->mv_type = MV_TYPE_FIELD;
894 if (s->picture_structure == PICT_FRAME) {
895 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
896 for (i = 0; i < 2; i++) {
897 if (USES_LIST(mb_type, i)) {
898 for (j = 0; j < 2; j++) {
899 s->field_select[i][j] = get_bits1(&s->gb);
900 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
901 s->last_mv[i][j][0]);
902 s->last_mv[i][j][0] = val;
903 s->mv[i][j][0] = val;
904 ff_tlog(s->avctx, "fmx=%d\n", val);
905 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
906 s->last_mv[i][j][1] >> 1);
907 s->last_mv[i][j][1] = 2 * val;
908 s->mv[i][j][1] = val;
909 ff_tlog(s->avctx, "fmy=%d\n", val);
914 av_assert0(!s->progressive_sequence);
915 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
916 for (i = 0; i < 2; i++) {
917 if (USES_LIST(mb_type, i)) {
918 s->field_select[i][0] = get_bits1(&s->gb);
919 for (k = 0; k < 2; k++) {
920 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
921 s->last_mv[i][0][k]);
922 s->last_mv[i][0][k] = val;
923 s->last_mv[i][1][k] = val;
924 s->mv[i][0][k] = val;
931 if (s->progressive_sequence){
932 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
933 return AVERROR_INVALIDDATA;
935 s->mv_type = MV_TYPE_DMV;
936 for (i = 0; i < 2; i++) {
937 if (USES_LIST(mb_type, i)) {
938 int dmx, dmy, mx, my, m;
939 const int my_shift = s->picture_structure == PICT_FRAME;
941 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
942 s->last_mv[i][0][0]);
943 s->last_mv[i][0][0] = mx;
944 s->last_mv[i][1][0] = mx;
946 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
947 s->last_mv[i][0][1] >> my_shift);
951 s->last_mv[i][0][1] = my * (1 << my_shift);
952 s->last_mv[i][1][1] = my * (1 << my_shift);
956 s->mv[i][1][0] = mx; // not used
957 s->mv[i][1][1] = my; // not used
959 if (s->picture_structure == PICT_FRAME) {
960 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
962 // m = 1 + 2 * s->top_field_first;
963 m = s->top_field_first ? 1 : 3;
965 /* top -> top pred */
966 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
967 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
969 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
970 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
972 mb_type |= MB_TYPE_16x16;
974 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
975 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
976 if (s->picture_structure == PICT_TOP_FIELD)
985 av_log(s->avctx, AV_LOG_ERROR,
986 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
987 return AVERROR_INVALIDDATA;
992 if (HAS_CBP(mb_type)) {
993 s->bdsp.clear_blocks(s->block[0]);
995 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
996 if (mb_block_count > 6) {
997 cbp *= 1 << mb_block_count - 6;
998 cbp |= get_bits(&s->gb, mb_block_count - 6);
999 s->bdsp.clear_blocks(s->block[6]);
1002 av_log(s->avctx, AV_LOG_ERROR,
1003 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1004 return AVERROR_INVALIDDATA;
1007 // if 1, we memcpy blocks in xvmcvideo
1008 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1009 ff_xvmc_pack_pblocks(s, cbp);
1011 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1012 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1013 for (i = 0; i < 6; i++) {
1015 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1017 s->block_last_index[i] = -1;
1021 cbp <<= 12 - mb_block_count;
1023 for (i = 0; i < mb_block_count; i++) {
1024 if (cbp & (1 << 11)) {
1025 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1028 s->block_last_index[i] = -1;
1034 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1035 for (i = 0; i < 6; i++) {
1037 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1039 s->block_last_index[i] = -1;
1043 for (i = 0; i < 6; i++) {
1045 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1048 s->block_last_index[i] = -1;
1055 for (i = 0; i < 12; i++)
1056 s->block_last_index[i] = -1;
1060 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1065 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1067 Mpeg1Context *s = avctx->priv_data;
1068 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1070 ff_mpv_decode_defaults(s2);
1072 if ( avctx->codec_tag != AV_RL32("VCR2")
1073 && avctx->codec_tag != AV_RL32("BW10"))
1074 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1075 ff_mpv_decode_init(s2, avctx);
1077 s->mpeg_enc_ctx.avctx = avctx;
1079 /* we need some permutation to store matrices,
1080 * until the decoder sets the real permutation. */
1081 ff_mpv_idct_init(s2);
1082 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1083 ff_mpeg12_init_vlcs();
1085 s2->chroma_format = 1;
1086 s->mpeg_enc_ctx_allocated = 0;
1087 s->mpeg_enc_ctx.picture_number = 0;
1088 s->repeat_field = 0;
1089 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1090 avctx->color_range = AVCOL_RANGE_MPEG;
1095 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1096 const AVCodecContext *avctx_from)
1098 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1099 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1102 if (avctx == avctx_from ||
1103 !ctx_from->mpeg_enc_ctx_allocated ||
1104 !s1->context_initialized)
1107 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1111 if (!ctx->mpeg_enc_ctx_allocated)
1112 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1114 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1115 s->picture_number++;
1121 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1122 const uint8_t *new_perm)
1124 uint16_t temp_matrix[64];
1127 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1129 for (i = 0; i < 64; i++)
1130 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1133 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1134 #if CONFIG_MPEG1_NVDEC_HWACCEL
1137 #if CONFIG_MPEG1_XVMC_HWACCEL
1140 #if CONFIG_MPEG1_VDPAU_HWACCEL
1147 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1148 #if CONFIG_MPEG2_NVDEC_HWACCEL
1151 #if CONFIG_MPEG2_XVMC_HWACCEL
1154 #if CONFIG_MPEG2_VDPAU_HWACCEL
1157 #if CONFIG_MPEG2_DXVA2_HWACCEL
1158 AV_PIX_FMT_DXVA2_VLD,
1160 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1161 AV_PIX_FMT_D3D11VA_VLD,
1164 #if CONFIG_MPEG2_VAAPI_HWACCEL
1167 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1168 AV_PIX_FMT_VIDEOTOOLBOX,
1174 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1179 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1184 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1186 Mpeg1Context *s1 = avctx->priv_data;
1187 MpegEncContext *s = &s1->mpeg_enc_ctx;
1188 const enum AVPixelFormat *pix_fmts;
1190 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1191 return AV_PIX_FMT_GRAY8;
1193 if (s->chroma_format < 2)
1194 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1195 mpeg1_hwaccel_pixfmt_list_420 :
1196 mpeg2_hwaccel_pixfmt_list_420;
1197 else if (s->chroma_format == 2)
1198 pix_fmts = mpeg12_pixfmt_list_422;
1200 pix_fmts = mpeg12_pixfmt_list_444;
1202 return ff_thread_get_format(avctx, pix_fmts);
1205 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1207 // until then pix_fmt may be changed right after codec init
1209 if (avctx->idct_algo == FF_IDCT_AUTO)
1210 avctx->idct_algo = FF_IDCT_NONE;
1212 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1213 Mpeg1Context *s1 = avctx->priv_data;
1214 MpegEncContext *s = &s1->mpeg_enc_ctx;
1216 s->pack_pblocks = 1;
1220 /* Call this function when we know all parameters.
1221 * It may be called in different places for MPEG-1 and MPEG-2. */
1222 static int mpeg_decode_postinit(AVCodecContext *avctx)
1224 Mpeg1Context *s1 = avctx->priv_data;
1225 MpegEncContext *s = &s1->mpeg_enc_ctx;
1226 uint8_t old_permutation[64];
1229 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1231 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1232 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1235 if (s->aspect_ratio_info > 1) {
1237 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1238 (AVRational) { s1->pan_scan.width,
1239 s1->pan_scan.height }),
1240 (AVRational) { s->width, s->height });
1242 /* We ignore the spec here and guess a bit as reality does not
1243 * match the spec, see for example res_change_ffmpeg_aspect.ts
1244 * and sequence-display-aspect.mpg.
1245 * issue1613, 621, 562 */
1246 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1247 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1248 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1249 s->avctx->sample_aspect_ratio =
1250 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1251 (AVRational) { s->width, s->height });
1253 s->avctx->sample_aspect_ratio =
1254 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1255 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1256 // issue1613 4/3 16/9 -> 16/9
1257 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1258 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1259 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1260 ff_dlog(avctx, "aspect A %d/%d\n",
1261 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1262 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1263 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1264 s->avctx->sample_aspect_ratio.den);
1267 s->avctx->sample_aspect_ratio =
1268 ff_mpeg2_aspect[s->aspect_ratio_info];
1272 if (av_image_check_sar(s->width, s->height,
1273 avctx->sample_aspect_ratio) < 0) {
1274 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1275 avctx->sample_aspect_ratio.num,
1276 avctx->sample_aspect_ratio.den);
1277 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1280 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1281 avctx->coded_width != s->width ||
1282 avctx->coded_height != s->height ||
1283 s1->save_width != s->width ||
1284 s1->save_height != s->height ||
1285 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1286 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1288 if (s1->mpeg_enc_ctx_allocated) {
1289 ParseContext pc = s->parse_context;
1290 s->parse_context.buffer = 0;
1291 ff_mpv_common_end(s);
1292 s->parse_context = pc;
1293 s1->mpeg_enc_ctx_allocated = 0;
1296 ret = ff_set_dimensions(avctx, s->width, s->height);
1300 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1301 avctx->rc_max_rate = s->bit_rate;
1302 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1303 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1304 avctx->bit_rate = s->bit_rate;
1306 s1->save_aspect = s->avctx->sample_aspect_ratio;
1307 s1->save_width = s->width;
1308 s1->save_height = s->height;
1309 s1->save_progressive_seq = s->progressive_sequence;
1311 /* low_delay may be forced, in this case we will have B-frames
1312 * that behave like P-frames. */
1313 avctx->has_b_frames = !s->low_delay;
1315 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1317 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1318 avctx->ticks_per_frame = 1;
1320 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1323 av_reduce(&s->avctx->framerate.num,
1324 &s->avctx->framerate.den,
1325 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1326 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1328 avctx->ticks_per_frame = 2;
1330 switch (s->chroma_format) {
1331 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1333 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1334 default: av_assert0(0);
1338 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1339 setup_hwaccel_for_pixfmt(avctx);
1341 /* Quantization matrices may need reordering
1342 * if DCT permutation is changed. */
1343 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1345 ff_mpv_idct_init(s);
1346 if ((ret = ff_mpv_common_init(s)) < 0)
1349 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1350 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1351 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1352 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1354 s1->mpeg_enc_ctx_allocated = 1;
1359 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1362 Mpeg1Context *s1 = avctx->priv_data;
1363 MpegEncContext *s = &s1->mpeg_enc_ctx;
1364 int ref, f_code, vbv_delay;
1366 init_get_bits(&s->gb, buf, buf_size * 8);
1368 ref = get_bits(&s->gb, 10); /* temporal ref */
1369 s->pict_type = get_bits(&s->gb, 3);
1370 if (s->pict_type == 0 || s->pict_type > 3)
1371 return AVERROR_INVALIDDATA;
1373 vbv_delay = get_bits(&s->gb, 16);
1374 s->vbv_delay = vbv_delay;
1375 if (s->pict_type == AV_PICTURE_TYPE_P ||
1376 s->pict_type == AV_PICTURE_TYPE_B) {
1377 s->full_pel[0] = get_bits1(&s->gb);
1378 f_code = get_bits(&s->gb, 3);
1379 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1380 return AVERROR_INVALIDDATA;
1382 s->mpeg_f_code[0][0] = f_code;
1383 s->mpeg_f_code[0][1] = f_code;
1385 if (s->pict_type == AV_PICTURE_TYPE_B) {
1386 s->full_pel[1] = get_bits1(&s->gb);
1387 f_code = get_bits(&s->gb, 3);
1388 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1389 return AVERROR_INVALIDDATA;
1391 s->mpeg_f_code[1][0] = f_code;
1392 s->mpeg_f_code[1][1] = f_code;
1394 s->current_picture.f->pict_type = s->pict_type;
1395 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1397 if (avctx->debug & FF_DEBUG_PICT_INFO)
1398 av_log(avctx, AV_LOG_DEBUG,
1399 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1406 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1408 MpegEncContext *s = &s1->mpeg_enc_ctx;
1409 int horiz_size_ext, vert_size_ext;
1412 skip_bits(&s->gb, 1); /* profile and level esc*/
1413 s->avctx->profile = get_bits(&s->gb, 3);
1414 s->avctx->level = get_bits(&s->gb, 4);
1415 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1416 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1418 if (!s->chroma_format) {
1419 s->chroma_format = 1;
1420 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1423 horiz_size_ext = get_bits(&s->gb, 2);
1424 vert_size_ext = get_bits(&s->gb, 2);
1425 s->width |= (horiz_size_ext << 12);
1426 s->height |= (vert_size_ext << 12);
1427 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1428 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1429 check_marker(s->avctx, &s->gb, "after bit rate extension");
1430 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1432 s->low_delay = get_bits1(&s->gb);
1433 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1436 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1437 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1439 ff_dlog(s->avctx, "sequence extension\n");
1440 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1442 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1443 av_log(s->avctx, AV_LOG_DEBUG,
1444 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1445 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1446 s->avctx->rc_buffer_size, s->bit_rate);
1449 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1451 MpegEncContext *s = &s1->mpeg_enc_ctx;
1452 int color_description, w, h;
1454 skip_bits(&s->gb, 3); /* video format */
1455 color_description = get_bits1(&s->gb);
1456 if (color_description) {
1457 s->avctx->color_primaries = get_bits(&s->gb, 8);
1458 s->avctx->color_trc = get_bits(&s->gb, 8);
1459 s->avctx->colorspace = get_bits(&s->gb, 8);
1461 w = get_bits(&s->gb, 14);
1462 skip_bits(&s->gb, 1); // marker
1463 h = get_bits(&s->gb, 14);
1464 // remaining 3 bits are zero padding
1466 s1->pan_scan.width = 16 * w;
1467 s1->pan_scan.height = 16 * h;
1469 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1470 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1473 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1475 MpegEncContext *s = &s1->mpeg_enc_ctx;
1479 if (s->progressive_sequence) {
1480 if (s->repeat_first_field) {
1482 if (s->top_field_first)
1486 if (s->picture_structure == PICT_FRAME) {
1488 if (s->repeat_first_field)
1492 for (i = 0; i < nofco; i++) {
1493 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1494 skip_bits(&s->gb, 1); // marker
1495 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1496 skip_bits(&s->gb, 1); // marker
1499 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1500 av_log(s->avctx, AV_LOG_DEBUG,
1501 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1502 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1503 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1504 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1507 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1508 uint16_t matrix1[64], int intra)
1512 for (i = 0; i < 64; i++) {
1513 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1514 int v = get_bits(&s->gb, 8);
1516 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1517 return AVERROR_INVALIDDATA;
1519 if (intra && i == 0 && v != 8) {
1520 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1521 v = 8; // needed by pink.mpg / issue1046
1530 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1532 ff_dlog(s->avctx, "matrix extension\n");
1534 if (get_bits1(&s->gb))
1535 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1536 if (get_bits1(&s->gb))
1537 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1538 if (get_bits1(&s->gb))
1539 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1540 if (get_bits1(&s->gb))
1541 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1544 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1546 MpegEncContext *s = &s1->mpeg_enc_ctx;
1548 s->full_pel[0] = s->full_pel[1] = 0;
1549 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1550 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1551 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1552 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1553 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1554 av_log(s->avctx, AV_LOG_ERROR,
1555 "Missing picture start code, guessing missing values\n");
1556 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1557 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1558 s->pict_type = AV_PICTURE_TYPE_I;
1560 s->pict_type = AV_PICTURE_TYPE_P;
1562 s->pict_type = AV_PICTURE_TYPE_B;
1563 s->current_picture.f->pict_type = s->pict_type;
1564 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1566 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1567 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1568 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1569 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1571 s->intra_dc_precision = get_bits(&s->gb, 2);
1572 s->picture_structure = get_bits(&s->gb, 2);
1573 s->top_field_first = get_bits1(&s->gb);
1574 s->frame_pred_frame_dct = get_bits1(&s->gb);
1575 s->concealment_motion_vectors = get_bits1(&s->gb);
1576 s->q_scale_type = get_bits1(&s->gb);
1577 s->intra_vlc_format = get_bits1(&s->gb);
1578 s->alternate_scan = get_bits1(&s->gb);
1579 s->repeat_first_field = get_bits1(&s->gb);
1580 s->chroma_420_type = get_bits1(&s->gb);
1581 s->progressive_frame = get_bits1(&s->gb);
1583 if (s->alternate_scan) {
1584 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1585 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1587 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1588 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1591 /* composite display not parsed */
1592 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1593 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1594 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1595 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1596 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1597 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1598 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1599 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1600 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1603 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1605 AVCodecContext *avctx = s->avctx;
1606 Mpeg1Context *s1 = (Mpeg1Context *) s;
1609 /* start frame decoding */
1610 if (s->first_field || s->picture_structure == PICT_FRAME) {
1611 AVFrameSideData *pan_scan;
1613 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1616 ff_mpeg_er_frame_start(s);
1618 /* first check if we must repeat the frame */
1619 s->current_picture_ptr->f->repeat_pict = 0;
1620 if (s->repeat_first_field) {
1621 if (s->progressive_sequence) {
1622 if (s->top_field_first)
1623 s->current_picture_ptr->f->repeat_pict = 4;
1625 s->current_picture_ptr->f->repeat_pict = 2;
1626 } else if (s->progressive_frame) {
1627 s->current_picture_ptr->f->repeat_pict = 1;
1631 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1632 AV_FRAME_DATA_PANSCAN,
1633 sizeof(s1->pan_scan));
1635 return AVERROR(ENOMEM);
1636 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1638 if (s1->a53_caption) {
1639 AVFrameSideData *sd = av_frame_new_side_data(
1640 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1641 s1->a53_caption_size);
1643 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1644 av_freep(&s1->a53_caption);
1647 if (s1->has_stereo3d) {
1648 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1650 return AVERROR(ENOMEM);
1652 *stereo = s1->stereo3d;
1653 s1->has_stereo3d = 0;
1657 AVFrameSideData *sd =
1658 av_frame_new_side_data(s->current_picture_ptr->f,
1659 AV_FRAME_DATA_AFD, 1);
1661 return AVERROR(ENOMEM);
1663 *sd->data = s1->afd;
1667 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1668 ff_thread_finish_setup(avctx);
1669 } else { // second field
1672 if (!s->current_picture_ptr) {
1673 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1674 return AVERROR_INVALIDDATA;
1677 if (s->avctx->hwaccel &&
1678 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1679 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1680 av_log(avctx, AV_LOG_ERROR,
1681 "hardware accelerator failed to decode first field\n");
1686 for (i = 0; i < 4; i++) {
1687 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1688 if (s->picture_structure == PICT_BOTTOM_FIELD)
1689 s->current_picture.f->data[i] +=
1690 s->current_picture_ptr->f->linesize[i];
1694 if (avctx->hwaccel) {
1695 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1702 #define DECODE_SLICE_ERROR -1
1703 #define DECODE_SLICE_OK 0
1707 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1708 * @return DECODE_SLICE_ERROR if the slice is damaged,
1709 * DECODE_SLICE_OK if this slice is OK
1711 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1712 const uint8_t **buf, int buf_size)
1714 AVCodecContext *avctx = s->avctx;
1715 const int lowres = s->avctx->lowres;
1716 const int field_pic = s->picture_structure != PICT_FRAME;
1720 s->resync_mb_y = -1;
1722 av_assert0(mb_y < s->mb_height);
1724 init_get_bits(&s->gb, *buf, buf_size * 8);
1725 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1726 skip_bits(&s->gb, 3);
1728 ff_mpeg1_clean_buffers(s);
1729 s->interlaced_dct = 0;
1731 s->qscale = get_qscale(s);
1733 if (s->qscale == 0) {
1734 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1735 return AVERROR_INVALIDDATA;
1738 /* extra slice info */
1739 if (skip_1stop_8data_bits(&s->gb) < 0)
1740 return AVERROR_INVALIDDATA;
1744 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1747 while (get_bits_left(&s->gb) > 0) {
1748 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1749 MBINCR_VLC_BITS, 2);
1751 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1752 return AVERROR_INVALIDDATA;
1757 /* otherwise, stuffing, nothing to do */
1765 if (s->mb_x >= (unsigned) s->mb_width) {
1766 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1767 return AVERROR_INVALIDDATA;
1770 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1771 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1772 int start_code = -1;
1773 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1774 if (buf_end < *buf + buf_size)
1777 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1778 return DECODE_SLICE_ERROR;
1780 return DECODE_SLICE_OK;
1783 s->resync_mb_x = s->mb_x;
1784 s->resync_mb_y = s->mb_y = mb_y;
1786 ff_init_block_index(s);
1788 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1789 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1790 av_log(s->avctx, AV_LOG_DEBUG,
1791 "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",
1793 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1794 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1795 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1796 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1797 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1798 s->progressive_sequence ? "ps" : "",
1799 s->progressive_frame ? "pf" : "",
1800 s->alternate_scan ? "alt" : "",
1801 s->top_field_first ? "top" : "",
1802 s->intra_dc_precision, s->picture_structure,
1803 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1804 s->q_scale_type, s->intra_vlc_format,
1805 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1810 // If 1, we memcpy blocks in xvmcvideo.
1811 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1812 ff_xvmc_init_block(s); // set s->block
1814 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1817 // Note motion_val is normally NULL unless we want to extract the MVs.
1818 if (s->current_picture.motion_val[0] && !s->encoding) {
1819 const int wrap = s->b8_stride;
1820 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1821 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1822 int motion_x, motion_y, dir, i;
1824 for (i = 0; i < 2; i++) {
1825 for (dir = 0; dir < 2; dir++) {
1827 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1828 motion_x = motion_y = 0;
1829 } else if (s->mv_type == MV_TYPE_16X16 ||
1830 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1831 motion_x = s->mv[dir][0][0];
1832 motion_y = s->mv[dir][0][1];
1833 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1834 motion_x = s->mv[dir][i][0];
1835 motion_y = s->mv[dir][i][1];
1838 s->current_picture.motion_val[dir][xy][0] = motion_x;
1839 s->current_picture.motion_val[dir][xy][1] = motion_y;
1840 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1841 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1842 s->current_picture.ref_index [dir][b8_xy] =
1843 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1844 av_assert2(s->field_select[dir][i] == 0 ||
1845 s->field_select[dir][i] == 1);
1852 s->dest[0] += 16 >> lowres;
1853 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1854 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1856 ff_mpv_reconstruct_mb(s, s->block);
1858 if (++s->mb_x >= s->mb_width) {
1859 const int mb_size = 16 >> s->avctx->lowres;
1862 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1863 ff_mpv_report_decode_progress(s);
1866 s->mb_y += 1 << field_pic;
1868 if (s->mb_y >= s->mb_height) {
1869 int left = get_bits_left(&s->gb);
1870 int is_d10 = s->chroma_format == 2 &&
1871 s->pict_type == AV_PICTURE_TYPE_I &&
1872 avctx->profile == 0 && avctx->level == 5 &&
1873 s->intra_dc_precision == 2 &&
1874 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1875 s->progressive_frame == 0
1876 /* vbv_delay == 0xBBB || 0xE10 */;
1878 if (left >= 32 && !is_d10) {
1879 GetBitContext gb = s->gb;
1880 align_get_bits(&gb);
1881 if (show_bits(&gb, 24) == 0x060E2B) {
1882 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1885 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1886 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1892 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1893 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1894 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1895 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1896 return AVERROR_INVALIDDATA;
1900 // There are some files out there which are missing the last slice
1901 // in cases where the slice is completely outside the visible
1902 // area, we detect this here instead of running into the end expecting
1904 left = get_bits_left(&s->gb);
1905 if (s->mb_y >= ((s->height + 15) >> 4) &&
1906 !s->progressive_sequence &&
1909 s->mb_skip_run == -1 &&
1910 (!left || show_bits(&s->gb, left) == 0))
1913 ff_init_block_index(s);
1916 /* skip mb handling */
1917 if (s->mb_skip_run == -1) {
1918 /* read increment again */
1921 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1922 MBINCR_VLC_BITS, 2);
1924 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1925 return AVERROR_INVALIDDATA;
1929 s->mb_skip_run += 33;
1930 } else if (code == 35) {
1931 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1932 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1933 return AVERROR_INVALIDDATA;
1935 goto eos; /* end of slice */
1937 /* otherwise, stuffing, nothing to do */
1939 s->mb_skip_run += code;
1943 if (s->mb_skip_run) {
1945 if (s->pict_type == AV_PICTURE_TYPE_I) {
1946 av_log(s->avctx, AV_LOG_ERROR,
1947 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1948 return AVERROR_INVALIDDATA;
1953 for (i = 0; i < 12; i++)
1954 s->block_last_index[i] = -1;
1955 if (s->picture_structure == PICT_FRAME)
1956 s->mv_type = MV_TYPE_16X16;
1958 s->mv_type = MV_TYPE_FIELD;
1959 if (s->pict_type == AV_PICTURE_TYPE_P) {
1960 /* if P type, zero motion vector is implied */
1961 s->mv_dir = MV_DIR_FORWARD;
1962 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1963 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1964 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1965 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1967 /* if B type, reuse previous vectors and directions */
1968 s->mv[0][0][0] = s->last_mv[0][0][0];
1969 s->mv[0][0][1] = s->last_mv[0][0][1];
1970 s->mv[1][0][0] = s->last_mv[1][0][0];
1971 s->mv[1][0][1] = s->last_mv[1][0][1];
1972 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1973 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1978 eos: // end of slice
1979 if (get_bits_left(&s->gb) < 0) {
1980 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1981 return AVERROR_INVALIDDATA;
1983 *buf += (get_bits_count(&s->gb) - 1) / 8;
1984 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);
1988 static int slice_decode_thread(AVCodecContext *c, void *arg)
1990 MpegEncContext *s = *(void **) arg;
1991 const uint8_t *buf = s->gb.buffer;
1992 int mb_y = s->start_mb_y;
1993 const int field_pic = s->picture_structure != PICT_FRAME;
1995 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1998 uint32_t start_code;
2001 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2003 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2004 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2005 s->start_mb_y, s->end_mb_y, s->er.error_count);
2007 if (c->err_recognition & AV_EF_EXPLODE)
2009 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2010 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2012 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2014 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2015 s->mb_x - 1, s->mb_y,
2016 ER_AC_END | ER_DC_END | ER_MV_END);
2019 if (s->mb_y == s->end_mb_y)
2023 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
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 < 0 || 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 s->avctx->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 s->avctx->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 av_freep(&s1->a53_caption);
2245 s1->a53_caption_size = cc_count * 3;
2246 s1->a53_caption = av_malloc(s1->a53_caption_size);
2247 if (!s1->a53_caption) {
2248 s1->a53_caption_size = 0;
2250 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2252 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2255 } else if (buf_size >= 2 &&
2256 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2257 /* extract SCTE-20 CC data */
2262 init_get_bits(&gb, p + 2, buf_size - 2);
2263 cc_count = get_bits(&gb, 5);
2265 av_freep(&s1->a53_caption);
2266 s1->a53_caption_size = cc_count * 3;
2267 s1->a53_caption = av_mallocz(s1->a53_caption_size);
2268 if (!s1->a53_caption) {
2269 s1->a53_caption_size = 0;
2271 uint8_t field, cc1, cc2;
2272 uint8_t *cap = s1->a53_caption;
2273 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2274 skip_bits(&gb, 2); // priority
2275 field = get_bits(&gb, 2);
2276 skip_bits(&gb, 5); // line_offset
2277 cc1 = get_bits(&gb, 8);
2278 cc2 = get_bits(&gb, 8);
2279 skip_bits(&gb, 1); // marker
2281 if (!field) { // forbidden
2282 cap[0] = cap[1] = cap[2] = 0x00;
2284 field = (field == 2 ? 1 : 0);
2285 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2286 cap[0] = 0x04 | field;
2287 cap[1] = ff_reverse[cc1];
2288 cap[2] = ff_reverse[cc2];
2293 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2296 } else if (buf_size >= 11 &&
2297 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2298 /* extract DVD CC data
2300 * uint32_t user_data_start_code 0x000001B2 (big endian)
2301 * uint16_t user_identifier 0x4343 "CC"
2302 * uint8_t user_data_type_code 0x01
2303 * uint8_t caption_block_size 0xF8
2305 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2306 * bit 6 caption_filler 0
2307 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2308 * bit 0 caption_extra_field_added 1=one additional caption word
2310 * struct caption_field_block {
2312 * bit 7:1 caption_filler 0x7F (all 1s)
2313 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2314 * uint8_t caption_first_byte
2315 * uint8_t caption_second_byte
2316 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2318 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2319 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2320 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2321 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2322 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2325 // There is a caption count field in the data, but it is often
2326 // incorrect. So count the number of captions present.
2327 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2329 // Transform the DVD format into A53 Part 4 format
2331 av_freep(&s1->a53_caption);
2332 s1->a53_caption_size = cc_count * 6;
2333 s1->a53_caption = av_malloc(s1->a53_caption_size);
2334 if (!s1->a53_caption) {
2335 s1->a53_caption_size = 0;
2337 uint8_t field1 = !!(p[4] & 0x80);
2338 uint8_t *cap = s1->a53_caption;
2340 for (i = 0; i < cc_count; i++) {
2341 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2344 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2351 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2358 static void mpeg_decode_user_data(AVCodecContext *avctx,
2359 const uint8_t *p, int buf_size)
2361 Mpeg1Context *s = avctx->priv_data;
2362 const uint8_t *buf_end = p + buf_size;
2363 Mpeg1Context *s1 = avctx->priv_data;
2367 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2368 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2370 av_log(avctx, AV_LOG_ERROR, "\n");
2376 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2380 /* we parse the DTG active format information */
2381 if (buf_end - p >= 5 &&
2382 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2390 if (buf_end - p < 1)
2393 s1->afd = p[0] & 0x0f;
2395 } else if (buf_end - p >= 6 &&
2396 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2397 p[4] == 0x03) { // S3D_video_format_length
2398 // the 0x7F mask ignores the reserved_bit value
2399 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2401 if (S3D_video_format_type == 0x03 ||
2402 S3D_video_format_type == 0x04 ||
2403 S3D_video_format_type == 0x08 ||
2404 S3D_video_format_type == 0x23) {
2406 s1->has_stereo3d = 1;
2408 switch (S3D_video_format_type) {
2410 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2413 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2416 s1->stereo3d.type = AV_STEREO3D_2D;
2419 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2423 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2428 static void mpeg_decode_gop(AVCodecContext *avctx,
2429 const uint8_t *buf, int buf_size)
2431 Mpeg1Context *s1 = avctx->priv_data;
2432 MpegEncContext *s = &s1->mpeg_enc_ctx;
2436 init_get_bits(&s->gb, buf, buf_size * 8);
2438 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2440 #if FF_API_PRIVATE_OPT
2441 FF_DISABLE_DEPRECATION_WARNINGS
2442 avctx->timecode_frame_start = tc;
2443 FF_ENABLE_DEPRECATION_WARNINGS
2446 s->closed_gop = get_bits1(&s->gb);
2447 /* broken_link indicates that after editing the
2448 * reference frames of the first B-Frames after GOP I-Frame
2449 * are missing (open gop) */
2450 broken_link = get_bits1(&s->gb);
2452 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2453 char tcbuf[AV_TIMECODE_STR_SIZE];
2454 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2455 av_log(s->avctx, AV_LOG_DEBUG,
2456 "GOP (%s) closed_gop=%d broken_link=%d\n",
2457 tcbuf, s->closed_gop, broken_link);
2461 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2462 int *got_output, const uint8_t *buf, int buf_size)
2464 Mpeg1Context *s = avctx->priv_data;
2465 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2466 const uint8_t *buf_ptr = buf;
2467 const uint8_t *buf_end = buf + buf_size;
2468 int ret, input_size;
2469 int last_code = 0, skip_frame = 0;
2470 int picture_start_code_seen = 0;
2473 /* find next start code */
2474 uint32_t start_code = -1;
2475 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2476 if (start_code > 0x1ff) {
2479 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2482 av_assert0(avctx->thread_count > 1);
2484 avctx->execute(avctx, slice_decode_thread,
2485 &s2->thread_context[0], NULL,
2486 s->slice_count, sizeof(void *));
2487 for (i = 0; i < s->slice_count; i++)
2488 s2->er.error_count += s2->thread_context[i]->er.error_count;
2491 ret = slice_end(avctx, picture);
2495 // FIXME: merge with the stuff in mpeg_decode_slice
2496 if (s2->last_picture_ptr || s2->low_delay)
2502 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2503 return AVERROR_INVALIDDATA;
2505 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2508 input_size = buf_end - buf_ptr;
2510 if (avctx->debug & FF_DEBUG_STARTCODE)
2511 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2512 start_code, buf_ptr - buf, input_size);
2514 /* prepare data for next start code */
2515 switch (start_code) {
2516 case SEQ_START_CODE:
2517 if (last_code == 0) {
2518 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2519 if (buf != avctx->extradata)
2522 av_log(avctx, AV_LOG_ERROR,
2523 "ignoring SEQ_START_CODE after %X\n", last_code);
2524 if (avctx->err_recognition & AV_EF_EXPLODE)
2525 return AVERROR_INVALIDDATA;
2529 case PICTURE_START_CODE:
2530 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2531 /* If it's a frame picture, there can't be more than one picture header.
2532 Yet, it does happen and we need to handle it. */
2533 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2536 picture_start_code_seen = 1;
2538 if (s2->width <= 0 || s2->height <= 0) {
2539 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2540 s2->width, s2->height);
2541 return AVERROR_INVALIDDATA;
2545 s2->intra_dc_precision= 3;
2546 s2->intra_matrix[0]= 1;
2548 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2549 !avctx->hwaccel && s->slice_count) {
2552 avctx->execute(avctx, slice_decode_thread,
2553 s2->thread_context, NULL,
2554 s->slice_count, sizeof(void *));
2555 for (i = 0; i < s->slice_count; i++)
2556 s2->er.error_count += s2->thread_context[i]->er.error_count;
2559 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2560 ret = mpeg_decode_postinit(avctx);
2562 av_log(avctx, AV_LOG_ERROR,
2563 "mpeg_decode_postinit() failure\n");
2567 /* We have a complete image: we try to decompress it. */
2568 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2571 last_code = PICTURE_START_CODE;
2573 av_log(avctx, AV_LOG_ERROR,
2574 "ignoring pic after %X\n", last_code);
2575 if (avctx->err_recognition & AV_EF_EXPLODE)
2576 return AVERROR_INVALIDDATA;
2579 case EXT_START_CODE:
2580 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2582 switch (get_bits(&s2->gb, 4)) {
2584 if (last_code == 0) {
2585 mpeg_decode_sequence_extension(s);
2587 av_log(avctx, AV_LOG_ERROR,
2588 "ignoring seq ext after %X\n", last_code);
2589 if (avctx->err_recognition & AV_EF_EXPLODE)
2590 return AVERROR_INVALIDDATA;
2594 mpeg_decode_sequence_display_extension(s);
2597 mpeg_decode_quant_matrix_extension(s2);
2600 mpeg_decode_picture_display_extension(s);
2603 if (last_code == PICTURE_START_CODE) {
2604 mpeg_decode_picture_coding_extension(s);
2606 av_log(avctx, AV_LOG_ERROR,
2607 "ignoring pic cod ext after %X\n", last_code);
2608 if (avctx->err_recognition & AV_EF_EXPLODE)
2609 return AVERROR_INVALIDDATA;
2614 case USER_START_CODE:
2615 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2617 case GOP_START_CODE:
2618 if (last_code == 0) {
2619 s2->first_field = 0;
2620 mpeg_decode_gop(avctx, buf_ptr, input_size);
2623 av_log(avctx, AV_LOG_ERROR,
2624 "ignoring GOP_START_CODE after %X\n", last_code);
2625 if (avctx->err_recognition & AV_EF_EXPLODE)
2626 return AVERROR_INVALIDDATA;
2630 if (start_code >= SLICE_MIN_START_CODE &&
2631 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2632 if (s2->progressive_sequence && !s2->progressive_frame) {
2633 s2->progressive_frame = 1;
2634 av_log(s2->avctx, AV_LOG_ERROR,
2635 "interlaced frame in progressive sequence, ignoring\n");
2638 if (s2->picture_structure == 0 ||
2639 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2640 av_log(s2->avctx, AV_LOG_ERROR,
2641 "picture_structure %d invalid, ignoring\n",
2642 s2->picture_structure);
2643 s2->picture_structure = PICT_FRAME;
2646 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2647 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2649 if (s2->picture_structure == PICT_FRAME) {
2650 s2->first_field = 0;
2651 s2->v_edge_pos = 16 * s2->mb_height;
2653 s2->first_field ^= 1;
2654 s2->v_edge_pos = 8 * s2->mb_height;
2655 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2658 if (start_code >= SLICE_MIN_START_CODE &&
2659 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2660 const int field_pic = s2->picture_structure != PICT_FRAME;
2661 int mb_y = start_code - SLICE_MIN_START_CODE;
2662 last_code = SLICE_MIN_START_CODE;
2663 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2664 mb_y += (*buf_ptr&0xE0)<<2;
2667 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2670 if (buf_end - buf_ptr < 2) {
2671 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2672 return AVERROR_INVALIDDATA;
2675 if (mb_y >= s2->mb_height) {
2676 av_log(s2->avctx, AV_LOG_ERROR,
2677 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2678 return AVERROR_INVALIDDATA;
2681 if (!s2->last_picture_ptr) {
2682 /* Skip B-frames if we do not have reference frames and
2683 * GOP is not closed. */
2684 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2685 if (!s2->closed_gop) {
2687 av_log(s2->avctx, AV_LOG_DEBUG,
2688 "Skipping B slice due to open GOP\n");
2693 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2695 if (!s2->next_picture_ptr) {
2696 /* Skip P-frames if we do not have a reference frame or
2697 * we have an invalid header. */
2698 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2700 av_log(s2->avctx, AV_LOG_DEBUG,
2701 "Skipping P slice due to !sync\n");
2705 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2706 s2->pict_type == AV_PICTURE_TYPE_B) ||
2707 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2708 s2->pict_type != AV_PICTURE_TYPE_I) ||
2709 avctx->skip_frame >= AVDISCARD_ALL) {
2714 if (!s->mpeg_enc_ctx_allocated)
2717 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2718 if (mb_y < avctx->skip_top ||
2719 mb_y >= s2->mb_height - avctx->skip_bottom)
2723 if (!s2->pict_type) {
2724 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2725 if (avctx->err_recognition & AV_EF_EXPLODE)
2726 return AVERROR_INVALIDDATA;
2730 if (s->first_slice) {
2733 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2736 if (!s2->current_picture_ptr) {
2737 av_log(avctx, AV_LOG_ERROR,
2738 "current_picture not initialized\n");
2739 return AVERROR_INVALIDDATA;
2743 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2745 int threshold = (s2->mb_height * s->slice_count +
2746 s2->slice_context_count / 2) /
2747 s2->slice_context_count;
2748 av_assert0(avctx->thread_count > 1);
2749 if (threshold <= mb_y) {
2750 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2752 thread_context->start_mb_y = mb_y;
2753 thread_context->end_mb_y = s2->mb_height;
2754 if (s->slice_count) {
2755 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2756 ret = ff_update_duplicate_context(thread_context, s2);
2760 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2763 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2765 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2769 if (avctx->err_recognition & AV_EF_EXPLODE)
2771 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2772 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2773 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2774 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2776 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2777 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2778 ER_AC_END | ER_DC_END | ER_MV_END);
2787 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2788 int *got_output, AVPacket *avpkt)
2790 const uint8_t *buf = avpkt->data;
2792 int buf_size = avpkt->size;
2793 Mpeg1Context *s = avctx->priv_data;
2794 AVFrame *picture = data;
2795 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2797 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2798 /* special case for last picture */
2799 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2800 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2804 s2->next_picture_ptr = NULL;
2811 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2812 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2815 if (ff_combine_frame(&s2->parse_context, next,
2816 (const uint8_t **) &buf, &buf_size) < 0)
2820 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2821 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2822 || s2->codec_tag == AV_RL32("BW10")
2824 vcr2_init_sequence(avctx);
2828 if (avctx->extradata && !s->extradata_decoded) {
2829 ret = decode_chunks(avctx, picture, got_output,
2830 avctx->extradata, avctx->extradata_size);
2832 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2833 av_frame_unref(picture);
2836 s->extradata_decoded = 1;
2837 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2838 s2->current_picture_ptr = NULL;
2843 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2844 if (ret<0 || *got_output) {
2845 s2->current_picture_ptr = NULL;
2847 if (s2->timecode_frame_start != -1 && *got_output) {
2848 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2849 AV_FRAME_DATA_GOP_TIMECODE,
2852 return AVERROR(ENOMEM);
2853 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2855 s2->timecode_frame_start = -1;
2862 static void flush(AVCodecContext *avctx)
2864 Mpeg1Context *s = avctx->priv_data;
2868 ff_mpeg_flush(avctx);
2871 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2873 Mpeg1Context *s = avctx->priv_data;
2875 if (s->mpeg_enc_ctx_allocated)
2876 ff_mpv_common_end(&s->mpeg_enc_ctx);
2877 av_freep(&s->a53_caption);
2881 AVCodec ff_mpeg1video_decoder = {
2882 .name = "mpeg1video",
2883 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2884 .type = AVMEDIA_TYPE_VIDEO,
2885 .id = AV_CODEC_ID_MPEG1VIDEO,
2886 .priv_data_size = sizeof(Mpeg1Context),
2887 .init = mpeg_decode_init,
2888 .close = mpeg_decode_end,
2889 .decode = mpeg_decode_frame,
2890 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2891 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2892 AV_CODEC_CAP_SLICE_THREADS,
2893 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2896 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2897 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2898 #if CONFIG_MPEG1_NVDEC_HWACCEL
2899 HWACCEL_NVDEC(mpeg1),
2901 #if CONFIG_MPEG1_VDPAU_HWACCEL
2902 HWACCEL_VDPAU(mpeg1),
2904 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2905 HWACCEL_VIDEOTOOLBOX(mpeg1),
2907 #if CONFIG_MPEG1_XVMC_HWACCEL
2908 HWACCEL_XVMC(mpeg1),
2914 AVCodec ff_mpeg2video_decoder = {
2915 .name = "mpeg2video",
2916 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2917 .type = AVMEDIA_TYPE_VIDEO,
2918 .id = AV_CODEC_ID_MPEG2VIDEO,
2919 .priv_data_size = sizeof(Mpeg1Context),
2920 .init = mpeg_decode_init,
2921 .close = mpeg_decode_end,
2922 .decode = mpeg_decode_frame,
2923 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2924 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2925 AV_CODEC_CAP_SLICE_THREADS,
2926 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2929 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2930 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2931 #if CONFIG_MPEG2_DXVA2_HWACCEL
2932 HWACCEL_DXVA2(mpeg2),
2934 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2935 HWACCEL_D3D11VA(mpeg2),
2937 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2938 HWACCEL_D3D11VA2(mpeg2),
2940 #if CONFIG_MPEG2_NVDEC_HWACCEL
2941 HWACCEL_NVDEC(mpeg2),
2943 #if CONFIG_MPEG2_VAAPI_HWACCEL
2944 HWACCEL_VAAPI(mpeg2),
2946 #if CONFIG_MPEG2_VDPAU_HWACCEL
2947 HWACCEL_VDPAU(mpeg2),
2949 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2950 HWACCEL_VIDEOTOOLBOX(mpeg2),
2952 #if CONFIG_MPEG2_XVMC_HWACCEL
2953 HWACCEL_XVMC(mpeg2),
2960 AVCodec ff_mpegvideo_decoder = {
2961 .name = "mpegvideo",
2962 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2963 .type = AVMEDIA_TYPE_VIDEO,
2964 .id = AV_CODEC_ID_MPEG2VIDEO,
2965 .priv_data_size = sizeof(Mpeg1Context),
2966 .init = mpeg_decode_init,
2967 .close = mpeg_decode_end,
2968 .decode = mpeg_decode_frame,
2969 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2970 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,