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 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1246 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1249 if (s->aspect_ratio_info > 1) {
1251 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1252 (AVRational) { s1->pan_scan.width,
1253 s1->pan_scan.height }),
1254 (AVRational) { s->width, s->height });
1256 /* We ignore the spec here and guess a bit as reality does not
1257 * match the spec, see for example res_change_ffmpeg_aspect.ts
1258 * and sequence-display-aspect.mpg.
1259 * issue1613, 621, 562 */
1260 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1261 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1262 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1263 s->avctx->sample_aspect_ratio =
1264 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1265 (AVRational) { s->width, s->height });
1267 s->avctx->sample_aspect_ratio =
1268 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1269 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1270 // issue1613 4/3 16/9 -> 16/9
1271 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1272 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1273 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1274 ff_dlog(avctx, "aspect A %d/%d\n",
1275 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1276 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1277 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1278 s->avctx->sample_aspect_ratio.den);
1281 s->avctx->sample_aspect_ratio =
1282 ff_mpeg2_aspect[s->aspect_ratio_info];
1286 if (av_image_check_sar(s->width, s->height,
1287 avctx->sample_aspect_ratio) < 0) {
1288 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1289 avctx->sample_aspect_ratio.num,
1290 avctx->sample_aspect_ratio.den);
1291 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1294 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1295 avctx->coded_width != s->width ||
1296 avctx->coded_height != s->height ||
1297 s1->save_width != s->width ||
1298 s1->save_height != s->height ||
1299 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1300 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1302 if (s1->mpeg_enc_ctx_allocated) {
1303 ParseContext pc = s->parse_context;
1304 s->parse_context.buffer = 0;
1305 ff_mpv_common_end(s);
1306 s->parse_context = pc;
1307 s1->mpeg_enc_ctx_allocated = 0;
1310 ret = ff_set_dimensions(avctx, s->width, s->height);
1314 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1315 avctx->rc_max_rate = s->bit_rate;
1316 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1317 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1318 avctx->bit_rate = s->bit_rate;
1320 s1->save_aspect = s->avctx->sample_aspect_ratio;
1321 s1->save_width = s->width;
1322 s1->save_height = s->height;
1323 s1->save_progressive_seq = s->progressive_sequence;
1325 /* low_delay may be forced, in this case we will have B-frames
1326 * that behave like P-frames. */
1327 avctx->has_b_frames = !s->low_delay;
1329 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1331 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1332 avctx->ticks_per_frame = 1;
1334 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1337 av_reduce(&s->avctx->framerate.num,
1338 &s->avctx->framerate.den,
1339 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1340 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1342 avctx->ticks_per_frame = 2;
1344 switch (s->chroma_format) {
1345 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1347 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1348 default: av_assert0(0);
1352 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1353 setup_hwaccel_for_pixfmt(avctx);
1355 /* Quantization matrices may need reordering
1356 * if DCT permutation is changed. */
1357 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1359 ff_mpv_idct_init(s);
1360 if ((ret = ff_mpv_common_init(s)) < 0)
1363 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1364 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1365 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1366 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1368 s1->mpeg_enc_ctx_allocated = 1;
1373 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1376 Mpeg1Context *s1 = avctx->priv_data;
1377 MpegEncContext *s = &s1->mpeg_enc_ctx;
1378 int ref, f_code, vbv_delay;
1380 init_get_bits(&s->gb, buf, buf_size * 8);
1382 ref = get_bits(&s->gb, 10); /* temporal ref */
1383 s->pict_type = get_bits(&s->gb, 3);
1384 if (s->pict_type == 0 || s->pict_type > 3)
1385 return AVERROR_INVALIDDATA;
1387 vbv_delay = get_bits(&s->gb, 16);
1388 s->vbv_delay = vbv_delay;
1389 if (s->pict_type == AV_PICTURE_TYPE_P ||
1390 s->pict_type == AV_PICTURE_TYPE_B) {
1391 s->full_pel[0] = get_bits1(&s->gb);
1392 f_code = get_bits(&s->gb, 3);
1393 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1394 return AVERROR_INVALIDDATA;
1396 s->mpeg_f_code[0][0] = f_code;
1397 s->mpeg_f_code[0][1] = f_code;
1399 if (s->pict_type == AV_PICTURE_TYPE_B) {
1400 s->full_pel[1] = get_bits1(&s->gb);
1401 f_code = get_bits(&s->gb, 3);
1402 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1403 return AVERROR_INVALIDDATA;
1405 s->mpeg_f_code[1][0] = f_code;
1406 s->mpeg_f_code[1][1] = f_code;
1408 s->current_picture.f->pict_type = s->pict_type;
1409 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1411 if (avctx->debug & FF_DEBUG_PICT_INFO)
1412 av_log(avctx, AV_LOG_DEBUG,
1413 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1420 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1422 MpegEncContext *s = &s1->mpeg_enc_ctx;
1423 int horiz_size_ext, vert_size_ext;
1426 skip_bits(&s->gb, 1); /* profile and level esc*/
1427 s->avctx->profile = get_bits(&s->gb, 3);
1428 s->avctx->level = get_bits(&s->gb, 4);
1429 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1430 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1432 if (!s->chroma_format) {
1433 s->chroma_format = 1;
1434 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1437 horiz_size_ext = get_bits(&s->gb, 2);
1438 vert_size_ext = get_bits(&s->gb, 2);
1439 s->width |= (horiz_size_ext << 12);
1440 s->height |= (vert_size_ext << 12);
1441 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1442 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1443 check_marker(s->avctx, &s->gb, "after bit rate extension");
1444 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1446 s->low_delay = get_bits1(&s->gb);
1447 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1450 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1451 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1453 ff_dlog(s->avctx, "sequence extension\n");
1454 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1456 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1457 av_log(s->avctx, AV_LOG_DEBUG,
1458 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1459 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1460 s->avctx->rc_buffer_size, s->bit_rate);
1463 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1465 MpegEncContext *s = &s1->mpeg_enc_ctx;
1466 int color_description, w, h;
1468 skip_bits(&s->gb, 3); /* video format */
1469 color_description = get_bits1(&s->gb);
1470 if (color_description) {
1471 s->avctx->color_primaries = get_bits(&s->gb, 8);
1472 s->avctx->color_trc = get_bits(&s->gb, 8);
1473 s->avctx->colorspace = get_bits(&s->gb, 8);
1475 w = get_bits(&s->gb, 14);
1476 skip_bits(&s->gb, 1); // marker
1477 h = get_bits(&s->gb, 14);
1478 // remaining 3 bits are zero padding
1480 s1->pan_scan.width = 16 * w;
1481 s1->pan_scan.height = 16 * h;
1483 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1484 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1487 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1489 MpegEncContext *s = &s1->mpeg_enc_ctx;
1493 if (s->progressive_sequence) {
1494 if (s->repeat_first_field) {
1496 if (s->top_field_first)
1500 if (s->picture_structure == PICT_FRAME) {
1502 if (s->repeat_first_field)
1506 for (i = 0; i < nofco; i++) {
1507 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1508 skip_bits(&s->gb, 1); // marker
1509 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1510 skip_bits(&s->gb, 1); // marker
1513 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1514 av_log(s->avctx, AV_LOG_DEBUG,
1515 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1516 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1517 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1518 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1521 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1522 uint16_t matrix1[64], int intra)
1526 for (i = 0; i < 64; i++) {
1527 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1528 int v = get_bits(&s->gb, 8);
1530 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1531 return AVERROR_INVALIDDATA;
1533 if (intra && i == 0 && v != 8) {
1534 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1535 v = 8; // needed by pink.mpg / issue1046
1544 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1546 ff_dlog(s->avctx, "matrix extension\n");
1548 if (get_bits1(&s->gb))
1549 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1550 if (get_bits1(&s->gb))
1551 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1552 if (get_bits1(&s->gb))
1553 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1554 if (get_bits1(&s->gb))
1555 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1558 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1560 MpegEncContext *s = &s1->mpeg_enc_ctx;
1562 s->full_pel[0] = s->full_pel[1] = 0;
1563 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1564 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1565 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1566 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1567 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1568 av_log(s->avctx, AV_LOG_ERROR,
1569 "Missing picture start code, guessing missing values\n");
1570 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1571 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1572 s->pict_type = AV_PICTURE_TYPE_I;
1574 s->pict_type = AV_PICTURE_TYPE_P;
1576 s->pict_type = AV_PICTURE_TYPE_B;
1577 s->current_picture.f->pict_type = s->pict_type;
1578 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1580 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1581 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1582 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1583 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1585 s->intra_dc_precision = get_bits(&s->gb, 2);
1586 s->picture_structure = get_bits(&s->gb, 2);
1587 s->top_field_first = get_bits1(&s->gb);
1588 s->frame_pred_frame_dct = get_bits1(&s->gb);
1589 s->concealment_motion_vectors = get_bits1(&s->gb);
1590 s->q_scale_type = get_bits1(&s->gb);
1591 s->intra_vlc_format = get_bits1(&s->gb);
1592 s->alternate_scan = get_bits1(&s->gb);
1593 s->repeat_first_field = get_bits1(&s->gb);
1594 s->chroma_420_type = get_bits1(&s->gb);
1595 s->progressive_frame = get_bits1(&s->gb);
1597 if (s->alternate_scan) {
1598 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1599 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1601 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1602 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1605 /* composite display not parsed */
1606 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1607 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1608 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1609 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1610 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1611 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1612 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1613 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1614 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1617 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1619 AVCodecContext *avctx = s->avctx;
1620 Mpeg1Context *s1 = (Mpeg1Context *) s;
1623 /* start frame decoding */
1624 if (s->first_field || s->picture_structure == PICT_FRAME) {
1625 AVFrameSideData *pan_scan;
1627 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1630 ff_mpeg_er_frame_start(s);
1632 /* first check if we must repeat the frame */
1633 s->current_picture_ptr->f->repeat_pict = 0;
1634 if (s->repeat_first_field) {
1635 if (s->progressive_sequence) {
1636 if (s->top_field_first)
1637 s->current_picture_ptr->f->repeat_pict = 4;
1639 s->current_picture_ptr->f->repeat_pict = 2;
1640 } else if (s->progressive_frame) {
1641 s->current_picture_ptr->f->repeat_pict = 1;
1645 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1646 AV_FRAME_DATA_PANSCAN,
1647 sizeof(s1->pan_scan));
1649 return AVERROR(ENOMEM);
1650 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1652 if (s1->a53_caption) {
1653 AVFrameSideData *sd = av_frame_new_side_data(
1654 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1655 s1->a53_caption_size);
1657 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1658 av_freep(&s1->a53_caption);
1661 if (s1->has_stereo3d) {
1662 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1664 return AVERROR(ENOMEM);
1666 *stereo = s1->stereo3d;
1667 s1->has_stereo3d = 0;
1671 AVFrameSideData *sd =
1672 av_frame_new_side_data(s->current_picture_ptr->f,
1673 AV_FRAME_DATA_AFD, 1);
1675 return AVERROR(ENOMEM);
1677 *sd->data = s1->afd;
1681 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1682 ff_thread_finish_setup(avctx);
1683 } else { // second field
1686 if (!s->current_picture_ptr) {
1687 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1688 return AVERROR_INVALIDDATA;
1691 if (s->avctx->hwaccel &&
1692 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1693 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1694 av_log(avctx, AV_LOG_ERROR,
1695 "hardware accelerator failed to decode first field\n");
1700 for (i = 0; i < 4; i++) {
1701 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1702 if (s->picture_structure == PICT_BOTTOM_FIELD)
1703 s->current_picture.f->data[i] +=
1704 s->current_picture_ptr->f->linesize[i];
1708 if (avctx->hwaccel) {
1709 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1716 #define DECODE_SLICE_ERROR -1
1717 #define DECODE_SLICE_OK 0
1721 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1722 * @return DECODE_SLICE_ERROR if the slice is damaged,
1723 * DECODE_SLICE_OK if this slice is OK
1725 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1726 const uint8_t **buf, int buf_size)
1728 AVCodecContext *avctx = s->avctx;
1729 const int lowres = s->avctx->lowres;
1730 const int field_pic = s->picture_structure != PICT_FRAME;
1734 s->resync_mb_y = -1;
1736 av_assert0(mb_y < s->mb_height);
1738 init_get_bits(&s->gb, *buf, buf_size * 8);
1739 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1740 skip_bits(&s->gb, 3);
1742 ff_mpeg1_clean_buffers(s);
1743 s->interlaced_dct = 0;
1745 s->qscale = get_qscale(s);
1747 if (s->qscale == 0) {
1748 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1749 return AVERROR_INVALIDDATA;
1752 /* extra slice info */
1753 if (skip_1stop_8data_bits(&s->gb) < 0)
1754 return AVERROR_INVALIDDATA;
1758 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1761 while (get_bits_left(&s->gb) > 0) {
1762 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1763 MBINCR_VLC_BITS, 2);
1765 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1766 return AVERROR_INVALIDDATA;
1771 /* otherwise, stuffing, nothing to do */
1779 if (s->mb_x >= (unsigned) s->mb_width) {
1780 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1781 return AVERROR_INVALIDDATA;
1784 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1785 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1786 int start_code = -1;
1787 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1788 if (buf_end < *buf + buf_size)
1791 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1792 return DECODE_SLICE_ERROR;
1794 return DECODE_SLICE_OK;
1797 s->resync_mb_x = s->mb_x;
1798 s->resync_mb_y = s->mb_y = mb_y;
1800 ff_init_block_index(s);
1802 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1803 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1804 av_log(s->avctx, AV_LOG_DEBUG,
1805 "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",
1807 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1808 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1809 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1810 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1811 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1812 s->progressive_sequence ? "ps" : "",
1813 s->progressive_frame ? "pf" : "",
1814 s->alternate_scan ? "alt" : "",
1815 s->top_field_first ? "top" : "",
1816 s->intra_dc_precision, s->picture_structure,
1817 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1818 s->q_scale_type, s->intra_vlc_format,
1819 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1824 // If 1, we memcpy blocks in xvmcvideo.
1825 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1826 ff_xvmc_init_block(s); // set s->block
1828 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1831 // Note motion_val is normally NULL unless we want to extract the MVs.
1832 if (s->current_picture.motion_val[0] && !s->encoding) {
1833 const int wrap = s->b8_stride;
1834 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1835 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1836 int motion_x, motion_y, dir, i;
1838 for (i = 0; i < 2; i++) {
1839 for (dir = 0; dir < 2; dir++) {
1841 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1842 motion_x = motion_y = 0;
1843 } else if (s->mv_type == MV_TYPE_16X16 ||
1844 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1845 motion_x = s->mv[dir][0][0];
1846 motion_y = s->mv[dir][0][1];
1847 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1848 motion_x = s->mv[dir][i][0];
1849 motion_y = s->mv[dir][i][1];
1852 s->current_picture.motion_val[dir][xy][0] = motion_x;
1853 s->current_picture.motion_val[dir][xy][1] = motion_y;
1854 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1855 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1856 s->current_picture.ref_index [dir][b8_xy] =
1857 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1858 av_assert2(s->field_select[dir][i] == 0 ||
1859 s->field_select[dir][i] == 1);
1866 s->dest[0] += 16 >> lowres;
1867 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1868 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1870 ff_mpv_decode_mb(s, s->block);
1872 if (++s->mb_x >= s->mb_width) {
1873 const int mb_size = 16 >> s->avctx->lowres;
1876 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1877 ff_mpv_report_decode_progress(s);
1880 s->mb_y += 1 << field_pic;
1882 if (s->mb_y >= s->mb_height) {
1883 int left = get_bits_left(&s->gb);
1884 int is_d10 = s->chroma_format == 2 &&
1885 s->pict_type == AV_PICTURE_TYPE_I &&
1886 avctx->profile == 0 && avctx->level == 5 &&
1887 s->intra_dc_precision == 2 &&
1888 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1889 s->progressive_frame == 0
1890 /* vbv_delay == 0xBBB || 0xE10 */;
1892 if (left >= 32 && !is_d10) {
1893 GetBitContext gb = s->gb;
1894 align_get_bits(&gb);
1895 if (show_bits(&gb, 24) == 0x060E2B) {
1896 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1899 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1900 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1906 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1907 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1908 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1909 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1910 return AVERROR_INVALIDDATA;
1914 // There are some files out there which are missing the last slice
1915 // in cases where the slice is completely outside the visible
1916 // area, we detect this here instead of running into the end expecting
1918 left = get_bits_left(&s->gb);
1919 if (s->mb_y >= ((s->height + 15) >> 4) &&
1920 !s->progressive_sequence &&
1923 s->mb_skip_run == -1 &&
1924 (!left || show_bits(&s->gb, left) == 0))
1927 ff_init_block_index(s);
1930 /* skip mb handling */
1931 if (s->mb_skip_run == -1) {
1932 /* read increment again */
1935 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1936 MBINCR_VLC_BITS, 2);
1938 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1939 return AVERROR_INVALIDDATA;
1943 s->mb_skip_run += 33;
1944 } else if (code == 35) {
1945 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1946 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1947 return AVERROR_INVALIDDATA;
1949 goto eos; /* end of slice */
1951 /* otherwise, stuffing, nothing to do */
1953 s->mb_skip_run += code;
1957 if (s->mb_skip_run) {
1959 if (s->pict_type == AV_PICTURE_TYPE_I) {
1960 av_log(s->avctx, AV_LOG_ERROR,
1961 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1962 return AVERROR_INVALIDDATA;
1967 for (i = 0; i < 12; i++)
1968 s->block_last_index[i] = -1;
1969 if (s->picture_structure == PICT_FRAME)
1970 s->mv_type = MV_TYPE_16X16;
1972 s->mv_type = MV_TYPE_FIELD;
1973 if (s->pict_type == AV_PICTURE_TYPE_P) {
1974 /* if P type, zero motion vector is implied */
1975 s->mv_dir = MV_DIR_FORWARD;
1976 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1977 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1978 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1979 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1981 /* if B type, reuse previous vectors and directions */
1982 s->mv[0][0][0] = s->last_mv[0][0][0];
1983 s->mv[0][0][1] = s->last_mv[0][0][1];
1984 s->mv[1][0][0] = s->last_mv[1][0][0];
1985 s->mv[1][0][1] = s->last_mv[1][0][1];
1990 eos: // end of slice
1991 if (get_bits_left(&s->gb) < 0) {
1992 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1993 return AVERROR_INVALIDDATA;
1995 *buf += (get_bits_count(&s->gb) - 1) / 8;
1996 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);
2000 static int slice_decode_thread(AVCodecContext *c, void *arg)
2002 MpegEncContext *s = *(void **) arg;
2003 const uint8_t *buf = s->gb.buffer;
2004 int mb_y = s->start_mb_y;
2005 const int field_pic = s->picture_structure != PICT_FRAME;
2007 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2010 uint32_t start_code;
2013 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2015 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2016 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2017 s->start_mb_y, s->end_mb_y, s->er.error_count);
2019 if (c->err_recognition & AV_EF_EXPLODE)
2021 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2022 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2024 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2026 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2027 s->mb_x - 1, s->mb_y,
2028 ER_AC_END | ER_DC_END | ER_MV_END);
2031 if (s->mb_y == s->end_mb_y)
2035 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2036 mb_y = start_code - SLICE_MIN_START_CODE;
2037 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2038 mb_y += (*buf&0xE0)<<2;
2040 if (s->picture_structure == PICT_BOTTOM_FIELD)
2042 if (mb_y < 0 || mb_y >= s->end_mb_y)
2043 return AVERROR_INVALIDDATA;
2048 * Handle slice ends.
2049 * @return 1 if it seems to be the last slice
2051 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2053 Mpeg1Context *s1 = avctx->priv_data;
2054 MpegEncContext *s = &s1->mpeg_enc_ctx;
2056 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2059 if (s->avctx->hwaccel) {
2060 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2062 av_log(avctx, AV_LOG_ERROR,
2063 "hardware accelerator failed to decode picture\n");
2068 /* end of slice reached */
2069 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2072 ff_er_frame_end(&s->er);
2074 ff_mpv_frame_end(s);
2076 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2077 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2080 ff_print_debug_info(s, s->current_picture_ptr, pict);
2081 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2083 if (avctx->active_thread_type & FF_THREAD_FRAME)
2084 s->picture_number++;
2085 /* latency of 1 frame for I- and P-frames */
2086 /* XXX: use another variable than picture_number */
2087 if (s->last_picture_ptr) {
2088 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2091 ff_print_debug_info(s, s->last_picture_ptr, pict);
2092 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2102 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2103 const uint8_t *buf, int buf_size)
2105 Mpeg1Context *s1 = avctx->priv_data;
2106 MpegEncContext *s = &s1->mpeg_enc_ctx;
2110 init_get_bits(&s->gb, buf, buf_size * 8);
2112 width = get_bits(&s->gb, 12);
2113 height = get_bits(&s->gb, 12);
2114 if (width == 0 || height == 0) {
2115 av_log(avctx, AV_LOG_WARNING,
2116 "Invalid horizontal or vertical size value.\n");
2117 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2118 return AVERROR_INVALIDDATA;
2120 s->aspect_ratio_info = get_bits(&s->gb, 4);
2121 if (s->aspect_ratio_info == 0) {
2122 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2123 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2124 return AVERROR_INVALIDDATA;
2126 s->frame_rate_index = get_bits(&s->gb, 4);
2127 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2128 av_log(avctx, AV_LOG_WARNING,
2129 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2130 s->frame_rate_index = 1;
2132 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2133 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2134 return AVERROR_INVALIDDATA;
2137 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2138 skip_bits(&s->gb, 1);
2141 if (get_bits1(&s->gb)) {
2142 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2144 for (i = 0; i < 64; i++) {
2145 j = s->idsp.idct_permutation[i];
2146 v = ff_mpeg1_default_intra_matrix[i];
2147 s->intra_matrix[j] = v;
2148 s->chroma_intra_matrix[j] = v;
2151 if (get_bits1(&s->gb)) {
2152 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2154 for (i = 0; i < 64; i++) {
2155 int j = s->idsp.idct_permutation[i];
2156 v = ff_mpeg1_default_non_intra_matrix[i];
2157 s->inter_matrix[j] = v;
2158 s->chroma_inter_matrix[j] = v;
2162 if (show_bits(&s->gb, 23) != 0) {
2163 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2164 return AVERROR_INVALIDDATA;
2170 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2171 s->progressive_sequence = 1;
2172 s->progressive_frame = 1;
2173 s->picture_structure = PICT_FRAME;
2175 s->frame_pred_frame_dct = 1;
2176 s->chroma_format = 1;
2178 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2179 s->out_format = FMT_MPEG1;
2180 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2181 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2184 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2185 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2186 s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2191 static int vcr2_init_sequence(AVCodecContext *avctx)
2193 Mpeg1Context *s1 = avctx->priv_data;
2194 MpegEncContext *s = &s1->mpeg_enc_ctx;
2197 /* start new MPEG-1 context decoding */
2198 s->out_format = FMT_MPEG1;
2199 if (s1->mpeg_enc_ctx_allocated) {
2200 ff_mpv_common_end(s);
2201 s1->mpeg_enc_ctx_allocated = 0;
2203 s->width = avctx->coded_width;
2204 s->height = avctx->coded_height;
2205 avctx->has_b_frames = 0; // true?
2208 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2209 setup_hwaccel_for_pixfmt(avctx);
2211 ff_mpv_idct_init(s);
2212 if ((ret = ff_mpv_common_init(s)) < 0)
2214 s1->mpeg_enc_ctx_allocated = 1;
2216 for (i = 0; i < 64; i++) {
2217 int j = s->idsp.idct_permutation[i];
2218 v = ff_mpeg1_default_intra_matrix[i];
2219 s->intra_matrix[j] = v;
2220 s->chroma_intra_matrix[j] = v;
2222 v = ff_mpeg1_default_non_intra_matrix[i];
2223 s->inter_matrix[j] = v;
2224 s->chroma_inter_matrix[j] = v;
2227 s->progressive_sequence = 1;
2228 s->progressive_frame = 1;
2229 s->picture_structure = PICT_FRAME;
2231 s->frame_pred_frame_dct = 1;
2232 s->chroma_format = 1;
2233 if (s->codec_tag == AV_RL32("BW10")) {
2234 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2236 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2237 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2239 s1->save_width = s->width;
2240 s1->save_height = s->height;
2241 s1->save_progressive_seq = s->progressive_sequence;
2245 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2246 const uint8_t *p, int buf_size)
2248 Mpeg1Context *s1 = avctx->priv_data;
2250 if (buf_size >= 6 &&
2251 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2252 p[4] == 3 && (p[5] & 0x40)) {
2253 /* extract A53 Part 4 CC data */
2254 int cc_count = p[5] & 0x1f;
2255 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2256 av_freep(&s1->a53_caption);
2257 s1->a53_caption_size = cc_count * 3;
2258 s1->a53_caption = av_malloc(s1->a53_caption_size);
2259 if (s1->a53_caption)
2260 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2261 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2264 } else if (buf_size >= 11 &&
2265 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2266 /* extract DVD CC data
2268 * uint32_t user_data_start_code 0x000001B2 (big endian)
2269 * uint16_t user_identifier 0x4343 "CC"
2270 * uint8_t user_data_type_code 0x01
2271 * uint8_t caption_block_size 0xF8
2273 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2274 * bit 6 caption_filler 0
2275 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2276 * bit 0 caption_extra_field_added 1=one additional caption word
2278 * struct caption_field_block {
2280 * bit 7:1 caption_filler 0x7F (all 1s)
2281 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2282 * uint8_t caption_first_byte
2283 * uint8_t caption_second_byte
2284 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2286 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2287 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2288 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2289 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2290 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2293 // There is a caption count field in the data, but it is often
2294 // incorrect. So count the number of captions present.
2295 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2297 // Transform the DVD format into A53 Part 4 format
2299 av_freep(&s1->a53_caption);
2300 s1->a53_caption_size = cc_count * 6;
2301 s1->a53_caption = av_malloc(s1->a53_caption_size);
2302 if (s1->a53_caption) {
2303 uint8_t field1 = !!(p[4] & 0x80);
2304 uint8_t *cap = s1->a53_caption;
2306 for (i = 0; i < cc_count; i++) {
2307 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2310 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2317 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2324 static void mpeg_decode_user_data(AVCodecContext *avctx,
2325 const uint8_t *p, int buf_size)
2327 Mpeg1Context *s = avctx->priv_data;
2328 const uint8_t *buf_end = p + buf_size;
2329 Mpeg1Context *s1 = avctx->priv_data;
2333 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2334 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2336 av_log(avctx, AV_LOG_ERROR, "\n");
2342 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2346 /* we parse the DTG active format information */
2347 if (buf_end - p >= 5 &&
2348 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2356 if (buf_end - p < 1)
2359 FF_DISABLE_DEPRECATION_WARNINGS
2360 avctx->dtg_active_format = p[0] & 0x0f;
2361 FF_ENABLE_DEPRECATION_WARNINGS
2362 #endif /* FF_API_AFD */
2364 s1->afd = p[0] & 0x0f;
2366 } else if (buf_end - p >= 6 &&
2367 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2368 p[4] == 0x03) { // S3D_video_format_length
2369 // the 0x7F mask ignores the reserved_bit value
2370 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2372 if (S3D_video_format_type == 0x03 ||
2373 S3D_video_format_type == 0x04 ||
2374 S3D_video_format_type == 0x08 ||
2375 S3D_video_format_type == 0x23) {
2377 s1->has_stereo3d = 1;
2379 switch (S3D_video_format_type) {
2381 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2384 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2387 s1->stereo3d.type = AV_STEREO3D_2D;
2390 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2394 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2399 static void mpeg_decode_gop(AVCodecContext *avctx,
2400 const uint8_t *buf, int buf_size)
2402 Mpeg1Context *s1 = avctx->priv_data;
2403 MpegEncContext *s = &s1->mpeg_enc_ctx;
2407 init_get_bits(&s->gb, buf, buf_size * 8);
2409 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2411 #if FF_API_PRIVATE_OPT
2412 FF_DISABLE_DEPRECATION_WARNINGS
2413 avctx->timecode_frame_start = tc;
2414 FF_ENABLE_DEPRECATION_WARNINGS
2417 s->closed_gop = get_bits1(&s->gb);
2418 /* broken_link indicates that after editing the
2419 * reference frames of the first B-Frames after GOP I-Frame
2420 * are missing (open gop) */
2421 broken_link = get_bits1(&s->gb);
2423 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2424 char tcbuf[AV_TIMECODE_STR_SIZE];
2425 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2426 av_log(s->avctx, AV_LOG_DEBUG,
2427 "GOP (%s) closed_gop=%d broken_link=%d\n",
2428 tcbuf, s->closed_gop, broken_link);
2432 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2433 int *got_output, const uint8_t *buf, int buf_size)
2435 Mpeg1Context *s = avctx->priv_data;
2436 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2437 const uint8_t *buf_ptr = buf;
2438 const uint8_t *buf_end = buf + buf_size;
2439 int ret, input_size;
2440 int last_code = 0, skip_frame = 0;
2441 int picture_start_code_seen = 0;
2444 /* find next start code */
2445 uint32_t start_code = -1;
2446 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2447 if (start_code > 0x1ff) {
2450 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2453 av_assert0(avctx->thread_count > 1);
2455 avctx->execute(avctx, slice_decode_thread,
2456 &s2->thread_context[0], NULL,
2457 s->slice_count, sizeof(void *));
2458 for (i = 0; i < s->slice_count; i++)
2459 s2->er.error_count += s2->thread_context[i]->er.error_count;
2463 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2464 && uses_vdpau(avctx))
2465 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2468 ret = slice_end(avctx, picture);
2472 // FIXME: merge with the stuff in mpeg_decode_slice
2473 if (s2->last_picture_ptr || s2->low_delay)
2479 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2480 return AVERROR_INVALIDDATA;
2482 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2485 input_size = buf_end - buf_ptr;
2487 if (avctx->debug & FF_DEBUG_STARTCODE)
2488 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2489 start_code, buf_ptr - buf, input_size);
2491 /* prepare data for next start code */
2492 switch (start_code) {
2493 case SEQ_START_CODE:
2494 if (last_code == 0) {
2495 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2496 if (buf != avctx->extradata)
2499 av_log(avctx, AV_LOG_ERROR,
2500 "ignoring SEQ_START_CODE after %X\n", last_code);
2501 if (avctx->err_recognition & AV_EF_EXPLODE)
2502 return AVERROR_INVALIDDATA;
2506 case PICTURE_START_CODE:
2507 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2508 /* If it's a frame picture, there can't be more than one picture header.
2509 Yet, it does happen and we need to handle it. */
2510 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2513 picture_start_code_seen = 1;
2515 if (s2->width <= 0 || s2->height <= 0) {
2516 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2517 s2->width, s2->height);
2518 return AVERROR_INVALIDDATA;
2522 s2->intra_dc_precision= 3;
2523 s2->intra_matrix[0]= 1;
2525 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2526 !avctx->hwaccel && s->slice_count) {
2529 avctx->execute(avctx, slice_decode_thread,
2530 s2->thread_context, NULL,
2531 s->slice_count, sizeof(void *));
2532 for (i = 0; i < s->slice_count; i++)
2533 s2->er.error_count += s2->thread_context[i]->er.error_count;
2536 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2537 ret = mpeg_decode_postinit(avctx);
2539 av_log(avctx, AV_LOG_ERROR,
2540 "mpeg_decode_postinit() failure\n");
2544 /* We have a complete image: we try to decompress it. */
2545 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2548 last_code = PICTURE_START_CODE;
2550 av_log(avctx, AV_LOG_ERROR,
2551 "ignoring pic after %X\n", last_code);
2552 if (avctx->err_recognition & AV_EF_EXPLODE)
2553 return AVERROR_INVALIDDATA;
2556 case EXT_START_CODE:
2557 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2559 switch (get_bits(&s2->gb, 4)) {
2561 if (last_code == 0) {
2562 mpeg_decode_sequence_extension(s);
2564 av_log(avctx, AV_LOG_ERROR,
2565 "ignoring seq ext after %X\n", last_code);
2566 if (avctx->err_recognition & AV_EF_EXPLODE)
2567 return AVERROR_INVALIDDATA;
2571 mpeg_decode_sequence_display_extension(s);
2574 mpeg_decode_quant_matrix_extension(s2);
2577 mpeg_decode_picture_display_extension(s);
2580 if (last_code == PICTURE_START_CODE) {
2581 mpeg_decode_picture_coding_extension(s);
2583 av_log(avctx, AV_LOG_ERROR,
2584 "ignoring pic cod ext after %X\n", last_code);
2585 if (avctx->err_recognition & AV_EF_EXPLODE)
2586 return AVERROR_INVALIDDATA;
2591 case USER_START_CODE:
2592 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2594 case GOP_START_CODE:
2595 if (last_code == 0) {
2596 s2->first_field = 0;
2597 mpeg_decode_gop(avctx, buf_ptr, input_size);
2600 av_log(avctx, AV_LOG_ERROR,
2601 "ignoring GOP_START_CODE after %X\n", last_code);
2602 if (avctx->err_recognition & AV_EF_EXPLODE)
2603 return AVERROR_INVALIDDATA;
2607 if (start_code >= SLICE_MIN_START_CODE &&
2608 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2609 if (s2->progressive_sequence && !s2->progressive_frame) {
2610 s2->progressive_frame = 1;
2611 av_log(s2->avctx, AV_LOG_ERROR,
2612 "interlaced frame in progressive sequence, ignoring\n");
2615 if (s2->picture_structure == 0 ||
2616 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2617 av_log(s2->avctx, AV_LOG_ERROR,
2618 "picture_structure %d invalid, ignoring\n",
2619 s2->picture_structure);
2620 s2->picture_structure = PICT_FRAME;
2623 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2624 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2626 if (s2->picture_structure == PICT_FRAME) {
2627 s2->first_field = 0;
2628 s2->v_edge_pos = 16 * s2->mb_height;
2630 s2->first_field ^= 1;
2631 s2->v_edge_pos = 8 * s2->mb_height;
2632 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2635 if (start_code >= SLICE_MIN_START_CODE &&
2636 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2637 const int field_pic = s2->picture_structure != PICT_FRAME;
2638 int mb_y = start_code - SLICE_MIN_START_CODE;
2639 last_code = SLICE_MIN_START_CODE;
2640 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2641 mb_y += (*buf_ptr&0xE0)<<2;
2644 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2647 if (buf_end - buf_ptr < 2) {
2648 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2649 return AVERROR_INVALIDDATA;
2652 if (mb_y >= s2->mb_height) {
2653 av_log(s2->avctx, AV_LOG_ERROR,
2654 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2655 return AVERROR_INVALIDDATA;
2658 if (!s2->last_picture_ptr) {
2659 /* Skip B-frames if we do not have reference frames and
2660 * GOP is not closed. */
2661 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2662 if (!s2->closed_gop) {
2664 av_log(s2->avctx, AV_LOG_DEBUG,
2665 "Skipping B slice due to open GOP\n");
2670 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2672 if (!s2->next_picture_ptr) {
2673 /* Skip P-frames if we do not have a reference frame or
2674 * we have an invalid header. */
2675 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2677 av_log(s2->avctx, AV_LOG_DEBUG,
2678 "Skipping P slice due to !sync\n");
2682 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2683 s2->pict_type == AV_PICTURE_TYPE_B) ||
2684 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2685 s2->pict_type != AV_PICTURE_TYPE_I) ||
2686 avctx->skip_frame >= AVDISCARD_ALL) {
2691 if (!s->mpeg_enc_ctx_allocated)
2694 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2695 if (mb_y < avctx->skip_top ||
2696 mb_y >= s2->mb_height - avctx->skip_bottom)
2700 if (!s2->pict_type) {
2701 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2702 if (avctx->err_recognition & AV_EF_EXPLODE)
2703 return AVERROR_INVALIDDATA;
2707 if (s->first_slice) {
2710 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2713 if (!s2->current_picture_ptr) {
2714 av_log(avctx, AV_LOG_ERROR,
2715 "current_picture not initialized\n");
2716 return AVERROR_INVALIDDATA;
2720 if (uses_vdpau(avctx)) {
2727 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2729 int threshold = (s2->mb_height * s->slice_count +
2730 s2->slice_context_count / 2) /
2731 s2->slice_context_count;
2732 av_assert0(avctx->thread_count > 1);
2733 if (threshold <= mb_y) {
2734 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2736 thread_context->start_mb_y = mb_y;
2737 thread_context->end_mb_y = s2->mb_height;
2738 if (s->slice_count) {
2739 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2740 ret = ff_update_duplicate_context(thread_context, s2);
2744 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2747 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2749 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2753 if (avctx->err_recognition & AV_EF_EXPLODE)
2755 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2756 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2757 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2758 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2760 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2761 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2762 ER_AC_END | ER_DC_END | ER_MV_END);
2771 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2772 int *got_output, AVPacket *avpkt)
2774 const uint8_t *buf = avpkt->data;
2776 int buf_size = avpkt->size;
2777 Mpeg1Context *s = avctx->priv_data;
2778 AVFrame *picture = data;
2779 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2781 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2782 /* special case for last picture */
2783 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2784 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2788 s2->next_picture_ptr = NULL;
2795 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2796 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2799 if (ff_combine_frame(&s2->parse_context, next,
2800 (const uint8_t **) &buf, &buf_size) < 0)
2804 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2805 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2806 || s2->codec_tag == AV_RL32("BW10")
2808 vcr2_init_sequence(avctx);
2812 if (avctx->extradata && !s->extradata_decoded) {
2813 ret = decode_chunks(avctx, picture, got_output,
2814 avctx->extradata, avctx->extradata_size);
2816 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2817 av_frame_unref(picture);
2820 s->extradata_decoded = 1;
2821 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2822 s2->current_picture_ptr = NULL;
2827 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2828 if (ret<0 || *got_output) {
2829 s2->current_picture_ptr = NULL;
2831 if (s2->timecode_frame_start != -1 && *got_output) {
2832 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2833 AV_FRAME_DATA_GOP_TIMECODE,
2836 return AVERROR(ENOMEM);
2837 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2839 s2->timecode_frame_start = -1;
2846 static void flush(AVCodecContext *avctx)
2848 Mpeg1Context *s = avctx->priv_data;
2852 ff_mpeg_flush(avctx);
2855 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2857 Mpeg1Context *s = avctx->priv_data;
2859 if (s->mpeg_enc_ctx_allocated)
2860 ff_mpv_common_end(&s->mpeg_enc_ctx);
2861 av_freep(&s->a53_caption);
2865 AVCodec ff_mpeg1video_decoder = {
2866 .name = "mpeg1video",
2867 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2868 .type = AVMEDIA_TYPE_VIDEO,
2869 .id = AV_CODEC_ID_MPEG1VIDEO,
2870 .priv_data_size = sizeof(Mpeg1Context),
2871 .init = mpeg_decode_init,
2872 .close = mpeg_decode_end,
2873 .decode = mpeg_decode_frame,
2874 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2875 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2876 AV_CODEC_CAP_SLICE_THREADS,
2877 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2880 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2883 AVCodec ff_mpeg2video_decoder = {
2884 .name = "mpeg2video",
2885 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2886 .type = AVMEDIA_TYPE_VIDEO,
2887 .id = AV_CODEC_ID_MPEG2VIDEO,
2888 .priv_data_size = sizeof(Mpeg1Context),
2889 .init = mpeg_decode_init,
2890 .close = mpeg_decode_end,
2891 .decode = mpeg_decode_frame,
2892 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2893 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2894 AV_CODEC_CAP_SLICE_THREADS,
2895 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2898 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2902 AVCodec ff_mpegvideo_decoder = {
2903 .name = "mpegvideo",
2904 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2905 .type = AVMEDIA_TYPE_VIDEO,
2906 .id = AV_CODEC_ID_MPEG2VIDEO,
2907 .priv_data_size = sizeof(Mpeg1Context),
2908 .init = mpeg_decode_init,
2909 .close = mpeg_decode_end,
2910 .decode = mpeg_decode_frame,
2911 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2912 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2918 #if CONFIG_MPEG_XVMC_DECODER
2919 FF_DISABLE_DEPRECATION_WARNINGS
2920 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2922 if (avctx->active_thread_type & FF_THREAD_SLICE)
2924 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2926 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2927 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2929 mpeg_decode_init(avctx);
2931 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2932 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2937 AVCodec ff_mpeg_xvmc_decoder = {
2938 .name = "mpegvideo_xvmc",
2939 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2940 .type = AVMEDIA_TYPE_VIDEO,
2941 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2942 .priv_data_size = sizeof(Mpeg1Context),
2943 .init = mpeg_mc_decode_init,
2944 .close = mpeg_decode_end,
2945 .decode = mpeg_decode_frame,
2946 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2947 AV_CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL |
2951 FF_ENABLE_DEPRECATION_WARNINGS
2953 #endif /* FF_API_XVMC */
2955 #if CONFIG_MPEG_VDPAU_DECODER && FF_API_VDPAU
2956 AVCodec ff_mpeg_vdpau_decoder = {
2957 .name = "mpegvideo_vdpau",
2958 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2959 .type = AVMEDIA_TYPE_VIDEO,
2960 .id = AV_CODEC_ID_MPEG2VIDEO,
2961 .priv_data_size = sizeof(Mpeg1Context),
2962 .init = mpeg_decode_init,
2963 .close = mpeg_decode_end,
2964 .decode = mpeg_decode_frame,
2965 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2966 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,
2971 #if CONFIG_MPEG1_VDPAU_DECODER && FF_API_VDPAU
2972 AVCodec ff_mpeg1_vdpau_decoder = {
2973 .name = "mpeg1video_vdpau",
2974 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2975 .type = AVMEDIA_TYPE_VIDEO,
2976 .id = AV_CODEC_ID_MPEG1VIDEO,
2977 .priv_data_size = sizeof(Mpeg1Context),
2978 .init = mpeg_decode_init,
2979 .close = mpeg_decode_end,
2980 .decode = mpeg_decode_frame,
2981 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED |
2982 AV_CODEC_CAP_HWACCEL_VDPAU | AV_CODEC_CAP_DELAY,