3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #define UNCHECKED_BITSTREAM_READER 1
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
46 #include "mpegvideodata.h"
50 #include "vdpau_compat.h"
51 #include "xvmc_internal.h"
53 typedef struct Mpeg1Context {
54 MpegEncContext mpeg_enc_ctx;
55 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
56 int repeat_field; /* true if we must repeat the field */
57 AVPanScan pan_scan; /* some temporary storage for the panscan */
65 AVRational save_aspect;
66 int save_width, save_height, save_progressive_seq;
67 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
68 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
71 int extradata_decoded;
74 #define MB_TYPE_ZERO_MV 0x20000000
76 static const uint32_t ptype2mb_type[7] = {
78 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
80 MB_TYPE_L0 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_INTRA,
82 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
83 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
86 static const uint32_t btype2mb_type[11] = {
89 MB_TYPE_L1 | MB_TYPE_CBP,
91 MB_TYPE_L0 | MB_TYPE_CBP,
93 MB_TYPE_L0L1 | MB_TYPE_CBP,
94 MB_TYPE_QUANT | MB_TYPE_INTRA,
95 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
96 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
97 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
100 /* as H.263, but only 17 codes */
101 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
103 int code, sign, val, shift;
105 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
111 sign = get_bits1(&s->gb);
115 val = (val - 1) << shift;
116 val |= get_bits(&s->gb, shift);
123 /* modulo decoding */
124 return sign_extend(val, 5 + shift);
127 #define 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_XVMC_HWACCEL
1137 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
1138 AV_PIX_FMT_VDPAU_MPEG1,
1140 #if CONFIG_MPEG1_VDPAU_HWACCEL
1147 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1148 #if CONFIG_MPEG2_XVMC_HWACCEL
1151 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
1152 AV_PIX_FMT_VDPAU_MPEG2,
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,
1163 #if CONFIG_MPEG2_VAAPI_HWACCEL
1166 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1167 AV_PIX_FMT_VIDEOTOOLBOX,
1173 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1178 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1184 static inline int uses_vdpau(AVCodecContext *avctx) {
1185 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1189 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1191 Mpeg1Context *s1 = avctx->priv_data;
1192 MpegEncContext *s = &s1->mpeg_enc_ctx;
1193 const enum AVPixelFormat *pix_fmts;
1195 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1196 return AV_PIX_FMT_GRAY8;
1198 if (s->chroma_format < 2)
1199 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1200 mpeg1_hwaccel_pixfmt_list_420 :
1201 mpeg2_hwaccel_pixfmt_list_420;
1202 else if (s->chroma_format == 2)
1203 pix_fmts = mpeg12_pixfmt_list_422;
1205 pix_fmts = mpeg12_pixfmt_list_444;
1207 return ff_thread_get_format(avctx, pix_fmts);
1210 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1212 // until then pix_fmt may be changed right after codec init
1215 || uses_vdpau(avctx)
1218 if (avctx->idct_algo == FF_IDCT_AUTO)
1219 avctx->idct_algo = FF_IDCT_SIMPLE;
1221 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1222 Mpeg1Context *s1 = avctx->priv_data;
1223 MpegEncContext *s = &s1->mpeg_enc_ctx;
1225 s->pack_pblocks = 1;
1227 FF_DISABLE_DEPRECATION_WARNINGS
1228 avctx->xvmc_acceleration = 2;
1229 FF_ENABLE_DEPRECATION_WARNINGS
1230 #endif /* FF_API_XVMC */
1234 /* Call this function when we know all parameters.
1235 * It may be called in different places for MPEG-1 and MPEG-2. */
1236 static int mpeg_decode_postinit(AVCodecContext *avctx)
1238 Mpeg1Context *s1 = avctx->priv_data;
1239 MpegEncContext *s = &s1->mpeg_enc_ctx;
1240 uint8_t old_permutation[64];
1243 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1245 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1248 if (s->aspect_ratio_info > 1) {
1250 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1251 (AVRational) { s1->pan_scan.width,
1252 s1->pan_scan.height }),
1253 (AVRational) { s->width, s->height });
1255 /* We ignore the spec here and guess a bit as reality does not
1256 * match the spec, see for example res_change_ffmpeg_aspect.ts
1257 * and sequence-display-aspect.mpg.
1258 * issue1613, 621, 562 */
1259 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1260 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1261 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1262 s->avctx->sample_aspect_ratio =
1263 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1264 (AVRational) { s->width, s->height });
1266 s->avctx->sample_aspect_ratio =
1267 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1268 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1269 // issue1613 4/3 16/9 -> 16/9
1270 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1271 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1272 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1273 ff_dlog(avctx, "aspect A %d/%d\n",
1274 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1275 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1276 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1277 s->avctx->sample_aspect_ratio.den);
1280 s->avctx->sample_aspect_ratio =
1281 ff_mpeg2_aspect[s->aspect_ratio_info];
1285 if (av_image_check_sar(s->width, s->height,
1286 avctx->sample_aspect_ratio) < 0) {
1287 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1288 avctx->sample_aspect_ratio.num,
1289 avctx->sample_aspect_ratio.den);
1290 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1293 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1294 avctx->coded_width != s->width ||
1295 avctx->coded_height != s->height ||
1296 s1->save_width != s->width ||
1297 s1->save_height != s->height ||
1298 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1299 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1301 if (s1->mpeg_enc_ctx_allocated) {
1302 ParseContext pc = s->parse_context;
1303 s->parse_context.buffer = 0;
1304 ff_mpv_common_end(s);
1305 s->parse_context = pc;
1306 s1->mpeg_enc_ctx_allocated = 0;
1309 ret = ff_set_dimensions(avctx, s->width, s->height);
1313 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1314 avctx->rc_max_rate = s->bit_rate;
1315 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1316 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1317 avctx->bit_rate = s->bit_rate;
1319 s1->save_aspect = s->avctx->sample_aspect_ratio;
1320 s1->save_width = s->width;
1321 s1->save_height = s->height;
1322 s1->save_progressive_seq = s->progressive_sequence;
1324 /* low_delay may be forced, in this case we will have B-frames
1325 * that behave like P-frames. */
1326 avctx->has_b_frames = !s->low_delay;
1328 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1330 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1331 avctx->ticks_per_frame = 1;
1333 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1336 av_reduce(&s->avctx->framerate.num,
1337 &s->avctx->framerate.den,
1338 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1339 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1341 avctx->ticks_per_frame = 2;
1343 switch (s->chroma_format) {
1344 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1346 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1347 default: av_assert0(0);
1351 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1352 setup_hwaccel_for_pixfmt(avctx);
1354 /* Quantization matrices may need reordering
1355 * if DCT permutation is changed. */
1356 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1358 ff_mpv_idct_init(s);
1359 if ((ret = ff_mpv_common_init(s)) < 0)
1362 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1363 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1364 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1365 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1367 s1->mpeg_enc_ctx_allocated = 1;
1372 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1375 Mpeg1Context *s1 = avctx->priv_data;
1376 MpegEncContext *s = &s1->mpeg_enc_ctx;
1377 int ref, f_code, vbv_delay;
1379 init_get_bits(&s->gb, buf, buf_size * 8);
1381 ref = get_bits(&s->gb, 10); /* temporal ref */
1382 s->pict_type = get_bits(&s->gb, 3);
1383 if (s->pict_type == 0 || s->pict_type > 3)
1384 return AVERROR_INVALIDDATA;
1386 vbv_delay = get_bits(&s->gb, 16);
1387 s->vbv_delay = vbv_delay;
1388 if (s->pict_type == AV_PICTURE_TYPE_P ||
1389 s->pict_type == AV_PICTURE_TYPE_B) {
1390 s->full_pel[0] = get_bits1(&s->gb);
1391 f_code = get_bits(&s->gb, 3);
1392 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1393 return AVERROR_INVALIDDATA;
1395 s->mpeg_f_code[0][0] = f_code;
1396 s->mpeg_f_code[0][1] = f_code;
1398 if (s->pict_type == AV_PICTURE_TYPE_B) {
1399 s->full_pel[1] = get_bits1(&s->gb);
1400 f_code = get_bits(&s->gb, 3);
1401 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1402 return AVERROR_INVALIDDATA;
1404 s->mpeg_f_code[1][0] = f_code;
1405 s->mpeg_f_code[1][1] = f_code;
1407 s->current_picture.f->pict_type = s->pict_type;
1408 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1410 if (avctx->debug & FF_DEBUG_PICT_INFO)
1411 av_log(avctx, AV_LOG_DEBUG,
1412 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1419 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1421 MpegEncContext *s = &s1->mpeg_enc_ctx;
1422 int horiz_size_ext, vert_size_ext;
1425 skip_bits(&s->gb, 1); /* profile and level esc*/
1426 s->avctx->profile = get_bits(&s->gb, 3);
1427 s->avctx->level = get_bits(&s->gb, 4);
1428 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1429 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1431 if (!s->chroma_format) {
1432 s->chroma_format = 1;
1433 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1436 horiz_size_ext = get_bits(&s->gb, 2);
1437 vert_size_ext = get_bits(&s->gb, 2);
1438 s->width |= (horiz_size_ext << 12);
1439 s->height |= (vert_size_ext << 12);
1440 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1441 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1442 check_marker(s->avctx, &s->gb, "after bit rate extension");
1443 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1445 s->low_delay = get_bits1(&s->gb);
1446 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1449 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1450 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1452 ff_dlog(s->avctx, "sequence extension\n");
1453 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1455 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1456 av_log(s->avctx, AV_LOG_DEBUG,
1457 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1458 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1459 s->avctx->rc_buffer_size, s->bit_rate);
1462 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1464 MpegEncContext *s = &s1->mpeg_enc_ctx;
1465 int color_description, w, h;
1467 skip_bits(&s->gb, 3); /* video format */
1468 color_description = get_bits1(&s->gb);
1469 if (color_description) {
1470 s->avctx->color_primaries = get_bits(&s->gb, 8);
1471 s->avctx->color_trc = get_bits(&s->gb, 8);
1472 s->avctx->colorspace = get_bits(&s->gb, 8);
1474 w = get_bits(&s->gb, 14);
1475 skip_bits(&s->gb, 1); // marker
1476 h = get_bits(&s->gb, 14);
1477 // remaining 3 bits are zero padding
1479 s1->pan_scan.width = 16 * w;
1480 s1->pan_scan.height = 16 * h;
1482 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1483 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1486 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1488 MpegEncContext *s = &s1->mpeg_enc_ctx;
1492 if (s->progressive_sequence) {
1493 if (s->repeat_first_field) {
1495 if (s->top_field_first)
1499 if (s->picture_structure == PICT_FRAME) {
1501 if (s->repeat_first_field)
1505 for (i = 0; i < nofco; i++) {
1506 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1507 skip_bits(&s->gb, 1); // marker
1508 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1509 skip_bits(&s->gb, 1); // marker
1512 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1513 av_log(s->avctx, AV_LOG_DEBUG,
1514 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1515 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1516 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1517 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1520 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1521 uint16_t matrix1[64], int intra)
1525 for (i = 0; i < 64; i++) {
1526 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1527 int v = get_bits(&s->gb, 8);
1529 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1530 return AVERROR_INVALIDDATA;
1532 if (intra && i == 0 && v != 8) {
1533 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1534 v = 8; // needed by pink.mpg / issue1046
1543 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1545 ff_dlog(s->avctx, "matrix extension\n");
1547 if (get_bits1(&s->gb))
1548 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1549 if (get_bits1(&s->gb))
1550 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1551 if (get_bits1(&s->gb))
1552 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1553 if (get_bits1(&s->gb))
1554 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1557 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1559 MpegEncContext *s = &s1->mpeg_enc_ctx;
1561 s->full_pel[0] = s->full_pel[1] = 0;
1562 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1563 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1564 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1565 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1566 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1567 av_log(s->avctx, AV_LOG_ERROR,
1568 "Missing picture start code, guessing missing values\n");
1569 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1570 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1571 s->pict_type = AV_PICTURE_TYPE_I;
1573 s->pict_type = AV_PICTURE_TYPE_P;
1575 s->pict_type = AV_PICTURE_TYPE_B;
1576 s->current_picture.f->pict_type = s->pict_type;
1577 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1579 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1580 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1581 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1582 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1584 s->intra_dc_precision = get_bits(&s->gb, 2);
1585 s->picture_structure = get_bits(&s->gb, 2);
1586 s->top_field_first = get_bits1(&s->gb);
1587 s->frame_pred_frame_dct = get_bits1(&s->gb);
1588 s->concealment_motion_vectors = get_bits1(&s->gb);
1589 s->q_scale_type = get_bits1(&s->gb);
1590 s->intra_vlc_format = get_bits1(&s->gb);
1591 s->alternate_scan = get_bits1(&s->gb);
1592 s->repeat_first_field = get_bits1(&s->gb);
1593 s->chroma_420_type = get_bits1(&s->gb);
1594 s->progressive_frame = get_bits1(&s->gb);
1596 if (s->alternate_scan) {
1597 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1598 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1600 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1601 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1604 /* composite display not parsed */
1605 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1606 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1607 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1608 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1609 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1610 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1611 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1612 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1613 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1616 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1618 AVCodecContext *avctx = s->avctx;
1619 Mpeg1Context *s1 = (Mpeg1Context *) s;
1622 /* start frame decoding */
1623 if (s->first_field || s->picture_structure == PICT_FRAME) {
1624 AVFrameSideData *pan_scan;
1626 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1629 ff_mpeg_er_frame_start(s);
1631 /* first check if we must repeat the frame */
1632 s->current_picture_ptr->f->repeat_pict = 0;
1633 if (s->repeat_first_field) {
1634 if (s->progressive_sequence) {
1635 if (s->top_field_first)
1636 s->current_picture_ptr->f->repeat_pict = 4;
1638 s->current_picture_ptr->f->repeat_pict = 2;
1639 } else if (s->progressive_frame) {
1640 s->current_picture_ptr->f->repeat_pict = 1;
1644 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1645 AV_FRAME_DATA_PANSCAN,
1646 sizeof(s1->pan_scan));
1648 return AVERROR(ENOMEM);
1649 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1651 if (s1->a53_caption) {
1652 AVFrameSideData *sd = av_frame_new_side_data(
1653 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1654 s1->a53_caption_size);
1656 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1657 av_freep(&s1->a53_caption);
1660 if (s1->has_stereo3d) {
1661 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1663 return AVERROR(ENOMEM);
1665 *stereo = s1->stereo3d;
1666 s1->has_stereo3d = 0;
1670 AVFrameSideData *sd =
1671 av_frame_new_side_data(s->current_picture_ptr->f,
1672 AV_FRAME_DATA_AFD, 1);
1674 return AVERROR(ENOMEM);
1676 *sd->data = s1->afd;
1680 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1681 ff_thread_finish_setup(avctx);
1682 } else { // second field
1685 if (!s->current_picture_ptr) {
1686 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1687 return AVERROR_INVALIDDATA;
1690 if (s->avctx->hwaccel &&
1691 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1692 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1693 av_log(avctx, AV_LOG_ERROR,
1694 "hardware accelerator failed to decode first field\n");
1699 for (i = 0; i < 4; i++) {
1700 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1701 if (s->picture_structure == PICT_BOTTOM_FIELD)
1702 s->current_picture.f->data[i] +=
1703 s->current_picture_ptr->f->linesize[i];
1707 if (avctx->hwaccel) {
1708 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1715 #define DECODE_SLICE_ERROR -1
1716 #define DECODE_SLICE_OK 0
1720 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1721 * @return DECODE_SLICE_ERROR if the slice is damaged,
1722 * DECODE_SLICE_OK if this slice is OK
1724 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1725 const uint8_t **buf, int buf_size)
1727 AVCodecContext *avctx = s->avctx;
1728 const int lowres = s->avctx->lowres;
1729 const int field_pic = s->picture_structure != PICT_FRAME;
1733 s->resync_mb_y = -1;
1735 av_assert0(mb_y < s->mb_height);
1737 init_get_bits(&s->gb, *buf, buf_size * 8);
1738 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1739 skip_bits(&s->gb, 3);
1741 ff_mpeg1_clean_buffers(s);
1742 s->interlaced_dct = 0;
1744 s->qscale = get_qscale(s);
1746 if (s->qscale == 0) {
1747 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1748 return AVERROR_INVALIDDATA;
1751 /* extra slice info */
1752 if (skip_1stop_8data_bits(&s->gb) < 0)
1753 return AVERROR_INVALIDDATA;
1757 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1760 while (get_bits_left(&s->gb) > 0) {
1761 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1762 MBINCR_VLC_BITS, 2);
1764 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1765 return AVERROR_INVALIDDATA;
1770 /* otherwise, stuffing, nothing to do */
1778 if (s->mb_x >= (unsigned) s->mb_width) {
1779 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1780 return AVERROR_INVALIDDATA;
1783 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1784 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1785 int start_code = -1;
1786 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1787 if (buf_end < *buf + buf_size)
1790 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1791 return DECODE_SLICE_ERROR;
1793 return DECODE_SLICE_OK;
1796 s->resync_mb_x = s->mb_x;
1797 s->resync_mb_y = s->mb_y = mb_y;
1799 ff_init_block_index(s);
1801 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1802 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1803 av_log(s->avctx, AV_LOG_DEBUG,
1804 "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",
1806 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1807 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1808 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1809 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1810 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1811 s->progressive_sequence ? "ps" : "",
1812 s->progressive_frame ? "pf" : "",
1813 s->alternate_scan ? "alt" : "",
1814 s->top_field_first ? "top" : "",
1815 s->intra_dc_precision, s->picture_structure,
1816 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1817 s->q_scale_type, s->intra_vlc_format,
1818 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1823 // If 1, we memcpy blocks in xvmcvideo.
1824 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1825 ff_xvmc_init_block(s); // set s->block
1827 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1830 // Note motion_val is normally NULL unless we want to extract the MVs.
1831 if (s->current_picture.motion_val[0] && !s->encoding) {
1832 const int wrap = s->b8_stride;
1833 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1834 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1835 int motion_x, motion_y, dir, i;
1837 for (i = 0; i < 2; i++) {
1838 for (dir = 0; dir < 2; dir++) {
1840 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1841 motion_x = motion_y = 0;
1842 } else if (s->mv_type == MV_TYPE_16X16 ||
1843 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1844 motion_x = s->mv[dir][0][0];
1845 motion_y = s->mv[dir][0][1];
1846 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1847 motion_x = s->mv[dir][i][0];
1848 motion_y = s->mv[dir][i][1];
1851 s->current_picture.motion_val[dir][xy][0] = motion_x;
1852 s->current_picture.motion_val[dir][xy][1] = motion_y;
1853 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1854 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1855 s->current_picture.ref_index [dir][b8_xy] =
1856 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1857 av_assert2(s->field_select[dir][i] == 0 ||
1858 s->field_select[dir][i] == 1);
1865 s->dest[0] += 16 >> lowres;
1866 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1867 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1869 ff_mpv_decode_mb(s, s->block);
1871 if (++s->mb_x >= s->mb_width) {
1872 const int mb_size = 16 >> s->avctx->lowres;
1875 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1876 ff_mpv_report_decode_progress(s);
1879 s->mb_y += 1 << field_pic;
1881 if (s->mb_y >= s->mb_height) {
1882 int left = get_bits_left(&s->gb);
1883 int is_d10 = s->chroma_format == 2 &&
1884 s->pict_type == AV_PICTURE_TYPE_I &&
1885 avctx->profile == 0 && avctx->level == 5 &&
1886 s->intra_dc_precision == 2 &&
1887 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1888 s->progressive_frame == 0
1889 /* vbv_delay == 0xBBB || 0xE10 */;
1891 if (left >= 32 && !is_d10) {
1892 GetBitContext gb = s->gb;
1893 align_get_bits(&gb);
1894 if (show_bits(&gb, 24) == 0x060E2B) {
1895 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1898 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1899 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1905 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1906 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1907 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1908 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1909 return AVERROR_INVALIDDATA;
1913 // There are some files out there which are missing the last slice
1914 // in cases where the slice is completely outside the visible
1915 // area, we detect this here instead of running into the end expecting
1917 left = get_bits_left(&s->gb);
1918 if (s->mb_y >= ((s->height + 15) >> 4) &&
1919 !s->progressive_sequence &&
1922 s->mb_skip_run == -1 &&
1923 (!left || show_bits(&s->gb, left) == 0))
1926 ff_init_block_index(s);
1929 /* skip mb handling */
1930 if (s->mb_skip_run == -1) {
1931 /* read increment again */
1934 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1935 MBINCR_VLC_BITS, 2);
1937 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1938 return AVERROR_INVALIDDATA;
1942 s->mb_skip_run += 33;
1943 } else if (code == 35) {
1944 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1945 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1946 return AVERROR_INVALIDDATA;
1948 goto eos; /* end of slice */
1950 /* otherwise, stuffing, nothing to do */
1952 s->mb_skip_run += code;
1956 if (s->mb_skip_run) {
1958 if (s->pict_type == AV_PICTURE_TYPE_I) {
1959 av_log(s->avctx, AV_LOG_ERROR,
1960 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1961 return AVERROR_INVALIDDATA;
1966 for (i = 0; i < 12; i++)
1967 s->block_last_index[i] = -1;
1968 if (s->picture_structure == PICT_FRAME)
1969 s->mv_type = MV_TYPE_16X16;
1971 s->mv_type = MV_TYPE_FIELD;
1972 if (s->pict_type == AV_PICTURE_TYPE_P) {
1973 /* if P type, zero motion vector is implied */
1974 s->mv_dir = MV_DIR_FORWARD;
1975 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1976 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1977 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1978 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1980 /* if B type, reuse previous vectors and directions */
1981 s->mv[0][0][0] = s->last_mv[0][0][0];
1982 s->mv[0][0][1] = s->last_mv[0][0][1];
1983 s->mv[1][0][0] = s->last_mv[1][0][0];
1984 s->mv[1][0][1] = s->last_mv[1][0][1];
1989 eos: // end of slice
1990 if (get_bits_left(&s->gb) < 0) {
1991 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1992 return AVERROR_INVALIDDATA;
1994 *buf += (get_bits_count(&s->gb) - 1) / 8;
1995 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);
1999 static int slice_decode_thread(AVCodecContext *c, void *arg)
2001 MpegEncContext *s = *(void **) arg;
2002 const uint8_t *buf = s->gb.buffer;
2003 int mb_y = s->start_mb_y;
2004 const int field_pic = s->picture_structure != PICT_FRAME;
2006 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2009 uint32_t start_code;
2012 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2014 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2015 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2016 s->start_mb_y, s->end_mb_y, s->er.error_count);
2018 if (c->err_recognition & AV_EF_EXPLODE)
2020 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2021 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2023 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2025 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2026 s->mb_x - 1, s->mb_y,
2027 ER_AC_END | ER_DC_END | ER_MV_END);
2030 if (s->mb_y == s->end_mb_y)
2034 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2035 mb_y = start_code - SLICE_MIN_START_CODE;
2036 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2037 mb_y += (*buf&0xE0)<<2;
2039 if (s->picture_structure == PICT_BOTTOM_FIELD)
2041 if (mb_y < 0 || mb_y >= s->end_mb_y)
2042 return AVERROR_INVALIDDATA;
2047 * Handle slice ends.
2048 * @return 1 if it seems to be the last slice
2050 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2052 Mpeg1Context *s1 = avctx->priv_data;
2053 MpegEncContext *s = &s1->mpeg_enc_ctx;
2055 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2058 if (s->avctx->hwaccel) {
2059 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2061 av_log(avctx, AV_LOG_ERROR,
2062 "hardware accelerator failed to decode picture\n");
2067 /* end of slice reached */
2068 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2071 ff_er_frame_end(&s->er);
2073 ff_mpv_frame_end(s);
2075 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2076 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2079 ff_print_debug_info(s, s->current_picture_ptr, pict);
2080 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2082 if (avctx->active_thread_type & FF_THREAD_FRAME)
2083 s->picture_number++;
2084 /* latency of 1 frame for I- and P-frames */
2085 /* XXX: use another variable than picture_number */
2086 if (s->last_picture_ptr) {
2087 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2090 ff_print_debug_info(s, s->last_picture_ptr, pict);
2091 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2101 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2102 const uint8_t *buf, int buf_size)
2104 Mpeg1Context *s1 = avctx->priv_data;
2105 MpegEncContext *s = &s1->mpeg_enc_ctx;
2109 init_get_bits(&s->gb, buf, buf_size * 8);
2111 width = get_bits(&s->gb, 12);
2112 height = get_bits(&s->gb, 12);
2113 if (width == 0 || height == 0) {
2114 av_log(avctx, AV_LOG_WARNING,
2115 "Invalid horizontal or vertical size value.\n");
2116 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2117 return AVERROR_INVALIDDATA;
2119 s->aspect_ratio_info = get_bits(&s->gb, 4);
2120 if (s->aspect_ratio_info == 0) {
2121 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2122 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2123 return AVERROR_INVALIDDATA;
2125 s->frame_rate_index = get_bits(&s->gb, 4);
2126 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2127 av_log(avctx, AV_LOG_WARNING,
2128 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2129 s->frame_rate_index = 1;
2131 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2132 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2133 return AVERROR_INVALIDDATA;
2136 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2137 skip_bits(&s->gb, 1);
2140 if (get_bits1(&s->gb)) {
2141 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2143 for (i = 0; i < 64; i++) {
2144 j = s->idsp.idct_permutation[i];
2145 v = ff_mpeg1_default_intra_matrix[i];
2146 s->intra_matrix[j] = v;
2147 s->chroma_intra_matrix[j] = v;
2150 if (get_bits1(&s->gb)) {
2151 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2153 for (i = 0; i < 64; i++) {
2154 int j = s->idsp.idct_permutation[i];
2155 v = ff_mpeg1_default_non_intra_matrix[i];
2156 s->inter_matrix[j] = v;
2157 s->chroma_inter_matrix[j] = v;
2161 if (show_bits(&s->gb, 23) != 0) {
2162 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2163 return AVERROR_INVALIDDATA;
2169 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2170 s->progressive_sequence = 1;
2171 s->progressive_frame = 1;
2172 s->picture_structure = PICT_FRAME;
2174 s->frame_pred_frame_dct = 1;
2175 s->chroma_format = 1;
2177 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2178 s->out_format = FMT_MPEG1;
2179 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2180 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2183 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2184 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2185 s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2190 static int vcr2_init_sequence(AVCodecContext *avctx)
2192 Mpeg1Context *s1 = avctx->priv_data;
2193 MpegEncContext *s = &s1->mpeg_enc_ctx;
2196 /* start new MPEG-1 context decoding */
2197 s->out_format = FMT_MPEG1;
2198 if (s1->mpeg_enc_ctx_allocated) {
2199 ff_mpv_common_end(s);
2200 s1->mpeg_enc_ctx_allocated = 0;
2202 s->width = avctx->coded_width;
2203 s->height = avctx->coded_height;
2204 avctx->has_b_frames = 0; // true?
2207 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2208 setup_hwaccel_for_pixfmt(avctx);
2210 ff_mpv_idct_init(s);
2211 if ((ret = ff_mpv_common_init(s)) < 0)
2213 s1->mpeg_enc_ctx_allocated = 1;
2215 for (i = 0; i < 64; i++) {
2216 int j = s->idsp.idct_permutation[i];
2217 v = ff_mpeg1_default_intra_matrix[i];
2218 s->intra_matrix[j] = v;
2219 s->chroma_intra_matrix[j] = v;
2221 v = ff_mpeg1_default_non_intra_matrix[i];
2222 s->inter_matrix[j] = v;
2223 s->chroma_inter_matrix[j] = v;
2226 s->progressive_sequence = 1;
2227 s->progressive_frame = 1;
2228 s->picture_structure = PICT_FRAME;
2230 s->frame_pred_frame_dct = 1;
2231 s->chroma_format = 1;
2232 if (s->codec_tag == AV_RL32("BW10")) {
2233 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2235 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2236 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2238 s1->save_width = s->width;
2239 s1->save_height = s->height;
2240 s1->save_progressive_seq = s->progressive_sequence;
2244 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2245 const uint8_t *p, int buf_size)
2247 Mpeg1Context *s1 = avctx->priv_data;
2249 if (buf_size >= 6 &&
2250 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2251 p[4] == 3 && (p[5] & 0x40)) {
2252 /* extract A53 Part 4 CC data */
2253 int cc_count = p[5] & 0x1f;
2254 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2255 av_freep(&s1->a53_caption);
2256 s1->a53_caption_size = cc_count * 3;
2257 s1->a53_caption = av_malloc(s1->a53_caption_size);
2258 if (s1->a53_caption)
2259 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2260 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2263 } else if (buf_size >= 11 &&
2264 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2265 /* extract DVD CC data
2267 * uint32_t user_data_start_code 0x000001B2 (big endian)
2268 * uint16_t user_identifier 0x4343 "CC"
2269 * uint8_t user_data_type_code 0x01
2270 * uint8_t caption_block_size 0xF8
2272 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2273 * bit 6 caption_filler 0
2274 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2275 * bit 0 caption_extra_field_added 1=one additional caption word
2277 * struct caption_field_block {
2279 * bit 7:1 caption_filler 0x7F (all 1s)
2280 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2281 * uint8_t caption_first_byte
2282 * uint8_t caption_second_byte
2283 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2285 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2286 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2287 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2288 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2289 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2292 // There is a caption count field in the data, but it is often
2293 // incorrect. So count the number of captions present.
2294 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2296 // Transform the DVD format into A53 Part 4 format
2298 av_freep(&s1->a53_caption);
2299 s1->a53_caption_size = cc_count * 6;
2300 s1->a53_caption = av_malloc(s1->a53_caption_size);
2301 if (s1->a53_caption) {
2302 uint8_t field1 = !!(p[4] & 0x80);
2303 uint8_t *cap = s1->a53_caption;
2305 for (i = 0; i < cc_count; i++) {
2306 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2309 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2316 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2323 static void mpeg_decode_user_data(AVCodecContext *avctx,
2324 const uint8_t *p, int buf_size)
2326 Mpeg1Context *s = avctx->priv_data;
2327 const uint8_t *buf_end = p + buf_size;
2328 Mpeg1Context *s1 = avctx->priv_data;
2332 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2333 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2335 av_log(avctx, AV_LOG_ERROR, "\n");
2341 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2345 /* we parse the DTG active format information */
2346 if (buf_end - p >= 5 &&
2347 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2355 if (buf_end - p < 1)
2358 FF_DISABLE_DEPRECATION_WARNINGS
2359 avctx->dtg_active_format = p[0] & 0x0f;
2360 FF_ENABLE_DEPRECATION_WARNINGS
2361 #endif /* FF_API_AFD */
2363 s1->afd = p[0] & 0x0f;
2365 } else if (buf_end - p >= 6 &&
2366 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2367 p[4] == 0x03) { // S3D_video_format_length
2368 // the 0x7F mask ignores the reserved_bit value
2369 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2371 if (S3D_video_format_type == 0x03 ||
2372 S3D_video_format_type == 0x04 ||
2373 S3D_video_format_type == 0x08 ||
2374 S3D_video_format_type == 0x23) {
2376 s1->has_stereo3d = 1;
2378 switch (S3D_video_format_type) {
2380 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2383 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2386 s1->stereo3d.type = AV_STEREO3D_2D;
2389 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2393 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2398 static void mpeg_decode_gop(AVCodecContext *avctx,
2399 const uint8_t *buf, int buf_size)
2401 Mpeg1Context *s1 = avctx->priv_data;
2402 MpegEncContext *s = &s1->mpeg_enc_ctx;
2406 init_get_bits(&s->gb, buf, buf_size * 8);
2408 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2410 #if FF_API_PRIVATE_OPT
2411 FF_DISABLE_DEPRECATION_WARNINGS
2412 avctx->timecode_frame_start = tc;
2413 FF_ENABLE_DEPRECATION_WARNINGS
2416 s->closed_gop = get_bits1(&s->gb);
2417 /* broken_link indicates that after editing the
2418 * reference frames of the first B-Frames after GOP I-Frame
2419 * are missing (open gop) */
2420 broken_link = get_bits1(&s->gb);
2422 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2423 char tcbuf[AV_TIMECODE_STR_SIZE];
2424 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2425 av_log(s->avctx, AV_LOG_DEBUG,
2426 "GOP (%s) closed_gop=%d broken_link=%d\n",
2427 tcbuf, s->closed_gop, broken_link);
2431 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2432 int *got_output, const uint8_t *buf, int buf_size)
2434 Mpeg1Context *s = avctx->priv_data;
2435 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2436 const uint8_t *buf_ptr = buf;
2437 const uint8_t *buf_end = buf + buf_size;
2438 int ret, input_size;
2439 int last_code = 0, skip_frame = 0;
2440 int picture_start_code_seen = 0;
2443 /* find next start code */
2444 uint32_t start_code = -1;
2445 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2446 if (start_code > 0x1ff) {
2449 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2452 av_assert0(avctx->thread_count > 1);
2454 avctx->execute(avctx, slice_decode_thread,
2455 &s2->thread_context[0], NULL,
2456 s->slice_count, sizeof(void *));
2457 for (i = 0; i < s->slice_count; i++)
2458 s2->er.error_count += s2->thread_context[i]->er.error_count;
2462 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2463 && uses_vdpau(avctx))
2464 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2467 ret = slice_end(avctx, picture);
2471 // FIXME: merge with the stuff in mpeg_decode_slice
2472 if (s2->last_picture_ptr || s2->low_delay)
2478 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2479 return AVERROR_INVALIDDATA;
2481 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2484 input_size = buf_end - buf_ptr;
2486 if (avctx->debug & FF_DEBUG_STARTCODE)
2487 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2488 start_code, buf_ptr - buf, input_size);
2490 /* prepare data for next start code */
2491 switch (start_code) {
2492 case SEQ_START_CODE:
2493 if (last_code == 0) {
2494 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2495 if (buf != avctx->extradata)
2498 av_log(avctx, AV_LOG_ERROR,
2499 "ignoring SEQ_START_CODE after %X\n", last_code);
2500 if (avctx->err_recognition & AV_EF_EXPLODE)
2501 return AVERROR_INVALIDDATA;
2505 case PICTURE_START_CODE:
2506 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2507 /* If it's a frame picture, there can't be more than one picture header.
2508 Yet, it does happen and we need to handle it. */
2509 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2512 picture_start_code_seen = 1;
2514 if (s2->width <= 0 || s2->height <= 0) {
2515 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2516 s2->width, s2->height);
2517 return AVERROR_INVALIDDATA;
2521 s2->intra_dc_precision= 3;
2522 s2->intra_matrix[0]= 1;
2524 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2525 !avctx->hwaccel && s->slice_count) {
2528 avctx->execute(avctx, slice_decode_thread,
2529 s2->thread_context, NULL,
2530 s->slice_count, sizeof(void *));
2531 for (i = 0; i < s->slice_count; i++)
2532 s2->er.error_count += s2->thread_context[i]->er.error_count;
2535 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2536 ret = mpeg_decode_postinit(avctx);
2538 av_log(avctx, AV_LOG_ERROR,
2539 "mpeg_decode_postinit() failure\n");
2543 /* We have a complete image: we try to decompress it. */
2544 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2547 last_code = PICTURE_START_CODE;
2549 av_log(avctx, AV_LOG_ERROR,
2550 "ignoring pic after %X\n", last_code);
2551 if (avctx->err_recognition & AV_EF_EXPLODE)
2552 return AVERROR_INVALIDDATA;
2555 case EXT_START_CODE:
2556 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2558 switch (get_bits(&s2->gb, 4)) {
2560 if (last_code == 0) {
2561 mpeg_decode_sequence_extension(s);
2563 av_log(avctx, AV_LOG_ERROR,
2564 "ignoring seq ext after %X\n", last_code);
2565 if (avctx->err_recognition & AV_EF_EXPLODE)
2566 return AVERROR_INVALIDDATA;
2570 mpeg_decode_sequence_display_extension(s);
2573 mpeg_decode_quant_matrix_extension(s2);
2576 mpeg_decode_picture_display_extension(s);
2579 if (last_code == PICTURE_START_CODE) {
2580 mpeg_decode_picture_coding_extension(s);
2582 av_log(avctx, AV_LOG_ERROR,
2583 "ignoring pic cod ext after %X\n", last_code);
2584 if (avctx->err_recognition & AV_EF_EXPLODE)
2585 return AVERROR_INVALIDDATA;
2590 case USER_START_CODE:
2591 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2593 case GOP_START_CODE:
2594 if (last_code == 0) {
2595 s2->first_field = 0;
2596 mpeg_decode_gop(avctx, buf_ptr, input_size);
2599 av_log(avctx, AV_LOG_ERROR,
2600 "ignoring GOP_START_CODE after %X\n", last_code);
2601 if (avctx->err_recognition & AV_EF_EXPLODE)
2602 return AVERROR_INVALIDDATA;
2606 if (start_code >= SLICE_MIN_START_CODE &&
2607 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2608 if (s2->progressive_sequence && !s2->progressive_frame) {
2609 s2->progressive_frame = 1;
2610 av_log(s2->avctx, AV_LOG_ERROR,
2611 "interlaced frame in progressive sequence, ignoring\n");
2614 if (s2->picture_structure == 0 ||
2615 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2616 av_log(s2->avctx, AV_LOG_ERROR,
2617 "picture_structure %d invalid, ignoring\n",
2618 s2->picture_structure);
2619 s2->picture_structure = PICT_FRAME;
2622 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2623 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2625 if (s2->picture_structure == PICT_FRAME) {
2626 s2->first_field = 0;
2627 s2->v_edge_pos = 16 * s2->mb_height;
2629 s2->first_field ^= 1;
2630 s2->v_edge_pos = 8 * s2->mb_height;
2631 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2634 if (start_code >= SLICE_MIN_START_CODE &&
2635 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2636 const int field_pic = s2->picture_structure != PICT_FRAME;
2637 int mb_y = start_code - SLICE_MIN_START_CODE;
2638 last_code = SLICE_MIN_START_CODE;
2639 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2640 mb_y += (*buf_ptr&0xE0)<<2;
2643 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2646 if (buf_end - buf_ptr < 2) {
2647 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2648 return AVERROR_INVALIDDATA;
2651 if (mb_y >= s2->mb_height) {
2652 av_log(s2->avctx, AV_LOG_ERROR,
2653 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2654 return AVERROR_INVALIDDATA;
2657 if (!s2->last_picture_ptr) {
2658 /* Skip B-frames if we do not have reference frames and
2659 * GOP is not closed. */
2660 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2661 if (!s2->closed_gop) {
2663 av_log(s2->avctx, AV_LOG_DEBUG,
2664 "Skipping B slice due to open GOP\n");
2669 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2671 if (!s2->next_picture_ptr) {
2672 /* Skip P-frames if we do not have a reference frame or
2673 * we have an invalid header. */
2674 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2676 av_log(s2->avctx, AV_LOG_DEBUG,
2677 "Skipping P slice due to !sync\n");
2681 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2682 s2->pict_type == AV_PICTURE_TYPE_B) ||
2683 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2684 s2->pict_type != AV_PICTURE_TYPE_I) ||
2685 avctx->skip_frame >= AVDISCARD_ALL) {
2690 if (!s->mpeg_enc_ctx_allocated)
2693 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2694 if (mb_y < avctx->skip_top ||
2695 mb_y >= s2->mb_height - avctx->skip_bottom)
2699 if (!s2->pict_type) {
2700 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2701 if (avctx->err_recognition & AV_EF_EXPLODE)
2702 return AVERROR_INVALIDDATA;
2706 if (s->first_slice) {
2709 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2712 if (!s2->current_picture_ptr) {
2713 av_log(avctx, AV_LOG_ERROR,
2714 "current_picture not initialized\n");
2715 return AVERROR_INVALIDDATA;
2719 if (uses_vdpau(avctx)) {
2726 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2728 int threshold = (s2->mb_height * s->slice_count +
2729 s2->slice_context_count / 2) /
2730 s2->slice_context_count;
2731 av_assert0(avctx->thread_count > 1);
2732 if (threshold <= mb_y) {
2733 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2735 thread_context->start_mb_y = mb_y;
2736 thread_context->end_mb_y = s2->mb_height;
2737 if (s->slice_count) {
2738 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2739 ret = ff_update_duplicate_context(thread_context, s2);
2743 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2746 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2748 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2752 if (avctx->err_recognition & AV_EF_EXPLODE)
2754 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2755 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2756 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2757 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2759 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2760 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2761 ER_AC_END | ER_DC_END | ER_MV_END);
2770 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2771 int *got_output, AVPacket *avpkt)
2773 const uint8_t *buf = avpkt->data;
2775 int buf_size = avpkt->size;
2776 Mpeg1Context *s = avctx->priv_data;
2777 AVFrame *picture = data;
2778 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2780 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2781 /* special case for last picture */
2782 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2783 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2787 s2->next_picture_ptr = NULL;
2794 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2795 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2798 if (ff_combine_frame(&s2->parse_context, next,
2799 (const uint8_t **) &buf, &buf_size) < 0)
2803 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2804 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2805 || s2->codec_tag == AV_RL32("BW10")
2807 vcr2_init_sequence(avctx);
2811 if (avctx->extradata && !s->extradata_decoded) {
2812 ret = decode_chunks(avctx, picture, got_output,
2813 avctx->extradata, avctx->extradata_size);
2815 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2816 av_frame_unref(picture);
2819 s->extradata_decoded = 1;
2820 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2821 s2->current_picture_ptr = NULL;
2826 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2827 if (ret<0 || *got_output) {
2828 s2->current_picture_ptr = NULL;
2830 if (s2->timecode_frame_start != -1 && *got_output) {
2831 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2832 AV_FRAME_DATA_GOP_TIMECODE,
2835 return AVERROR(ENOMEM);
2836 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2838 s2->timecode_frame_start = -1;
2845 static void flush(AVCodecContext *avctx)
2847 Mpeg1Context *s = avctx->priv_data;
2851 ff_mpeg_flush(avctx);
2854 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2856 Mpeg1Context *s = avctx->priv_data;
2858 if (s->mpeg_enc_ctx_allocated)
2859 ff_mpv_common_end(&s->mpeg_enc_ctx);
2860 av_freep(&s->a53_caption);
2864 AVCodec ff_mpeg1video_decoder = {
2865 .name = "mpeg1video",
2866 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2867 .type = AVMEDIA_TYPE_VIDEO,
2868 .id = AV_CODEC_ID_MPEG1VIDEO,
2869 .priv_data_size = sizeof(Mpeg1Context),
2870 .init = mpeg_decode_init,
2871 .close = mpeg_decode_end,
2872 .decode = mpeg_decode_frame,
2873 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2874 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2875 AV_CODEC_CAP_SLICE_THREADS,
2876 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2879 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2882 AVCodec ff_mpeg2video_decoder = {
2883 .name = "mpeg2video",
2884 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2885 .type = AVMEDIA_TYPE_VIDEO,
2886 .id = AV_CODEC_ID_MPEG2VIDEO,
2887 .priv_data_size = sizeof(Mpeg1Context),
2888 .init = mpeg_decode_init,
2889 .close = mpeg_decode_end,
2890 .decode = mpeg_decode_frame,
2891 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2892 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2893 AV_CODEC_CAP_SLICE_THREADS,
2894 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2897 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2901 AVCodec ff_mpegvideo_decoder = {
2902 .name = "mpegvideo",
2903 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2904 .type = AVMEDIA_TYPE_VIDEO,
2905 .id = AV_CODEC_ID_MPEG2VIDEO,
2906 .priv_data_size = sizeof(Mpeg1Context),
2907 .init = mpeg_decode_init,
2908 .close = mpeg_decode_end,
2909 .decode = mpeg_decode_frame,
2910 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2911 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2917 #if CONFIG_MPEG_XVMC_DECODER
2918 FF_DISABLE_DEPRECATION_WARNINGS
2919 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2921 if (avctx->active_thread_type & FF_THREAD_SLICE)
2923 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2925 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2926 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2928 mpeg_decode_init(avctx);
2930 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2931 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2936 AVCodec ff_mpeg_xvmc_decoder = {
2937 .name = "mpegvideo_xvmc",
2938 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2939 .type = AVMEDIA_TYPE_VIDEO,
2940 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2941 .priv_data_size = sizeof(Mpeg1Context),
2942 .init = mpeg_mc_decode_init,
2943 .close = mpeg_decode_end,
2944 .decode = mpeg_decode_frame,
2945 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2946 AV_CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL |
2950 FF_ENABLE_DEPRECATION_WARNINGS
2952 #endif /* FF_API_XVMC */
2954 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
2955 AVCodec ff_mpeg_vdpau_decoder = {
2956 .name = "mpegvideo_vdpau",
2957 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2958 .type = AVMEDIA_TYPE_VIDEO,
2959 .id = AV_CODEC_ID_MPEG2VIDEO,
2960 .priv_data_size = sizeof(Mpeg1Context),
2961 .init = mpeg_decode_init,
2962 .close = mpeg_decode_end,
2963 .decode = mpeg_decode_frame,
2964 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2965 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,
2970 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
2971 AVCodec ff_mpeg1_vdpau_decoder = {
2972 .name = "mpeg1video_vdpau",
2973 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2974 .type = AVMEDIA_TYPE_VIDEO,
2975 .id = AV_CODEC_ID_MPEG1VIDEO,
2976 .priv_data_size = sizeof(Mpeg1Context),
2977 .init = mpeg_decode_init,
2978 .close = mpeg_decode_end,
2979 .decode = mpeg_decode_frame,
2980 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2981 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,