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/mem_internal.h"
35 #include "libavutil/stereo3d.h"
36 #include "libavutil/video_enc_params.h"
39 #include "bytestream.h"
40 #include "error_resilience.h"
46 #include "mpeg12data.h"
47 #include "mpegutils.h"
48 #include "mpegvideo.h"
49 #include "mpegvideodata.h"
53 #include "xvmc_internal.h"
55 #define A53_MAX_CC_COUNT 2000
57 typedef struct Mpeg1Context {
58 MpegEncContext mpeg_enc_ctx;
59 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
60 int repeat_field; /* true if we must repeat the field */
61 AVPanScan pan_scan; /* some temporary storage for the panscan */
64 AVBufferRef *a53_buf_ref;
68 AVRational save_aspect;
69 int save_width, save_height, save_progressive_seq;
71 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
72 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
75 int extradata_decoded;
78 #define MB_TYPE_ZERO_MV 0x20000000
80 static const uint32_t ptype2mb_type[7] = {
82 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
84 MB_TYPE_L0 | MB_TYPE_CBP,
85 MB_TYPE_QUANT | MB_TYPE_INTRA,
86 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
87 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
90 static const uint32_t btype2mb_type[11] = {
93 MB_TYPE_L1 | MB_TYPE_CBP,
95 MB_TYPE_L0 | MB_TYPE_CBP,
97 MB_TYPE_L0L1 | MB_TYPE_CBP,
98 MB_TYPE_QUANT | MB_TYPE_INTRA,
99 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
100 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
101 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
104 /* as H.263, but only 17 codes */
105 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
107 int code, sign, val, shift;
109 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
115 sign = get_bits1(&s->gb);
119 val = (val - 1) << shift;
120 val |= get_bits(&s->gb, shift);
127 /* modulo decoding */
128 return sign_extend(val, 5 + shift);
131 #define MAX_INDEX (64 - 1)
132 #define check_scantable_index(ctx, x) \
134 if ((x) > MAX_INDEX) { \
135 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
136 ctx->mb_x, ctx->mb_y); \
137 return AVERROR_INVALIDDATA; \
141 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
142 int16_t *block, int n)
144 int level, i, j, run;
145 RLTable *rl = &ff_rl_mpeg1;
146 uint8_t *const scantable = s->intra_scantable.permutated;
147 const uint16_t *quant_matrix = s->inter_matrix;
148 const int qscale = s->qscale;
151 OPEN_READER(re, &s->gb);
153 // special case for first coefficient, no need to add second VLC table
154 UPDATE_CACHE(re, &s->gb);
155 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
156 level = (3 * qscale * quant_matrix[0]) >> 5;
157 level = (level - 1) | 1;
158 if (GET_CACHE(re, &s->gb) & 0x40000000)
162 SKIP_BITS(re, &s->gb, 2);
163 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
166 /* now quantify & encode AC coefficients */
168 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
176 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
177 level = (level - 1) | 1;
178 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
179 SHOW_SBITS(re, &s->gb, 1);
180 SKIP_BITS(re, &s->gb, 1);
183 run = SHOW_UBITS(re, &s->gb, 6) + 1;
184 LAST_SKIP_BITS(re, &s->gb, 6);
185 UPDATE_CACHE(re, &s->gb);
186 level = SHOW_SBITS(re, &s->gb, 8);
187 SKIP_BITS(re, &s->gb, 8);
189 level = SHOW_UBITS(re, &s->gb, 8) - 256;
190 SKIP_BITS(re, &s->gb, 8);
191 } else if (level == 0) {
192 level = SHOW_UBITS(re, &s->gb, 8);
193 SKIP_BITS(re, &s->gb, 8);
201 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
202 level = (level - 1) | 1;
205 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
206 level = (level - 1) | 1;
211 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
213 UPDATE_CACHE(re, &s->gb);
216 LAST_SKIP_BITS(re, &s->gb, 2);
217 CLOSE_READER(re, &s->gb);
220 check_scantable_index(s, i);
222 s->block_last_index[n] = i;
227 * Changing this would eat up any speed benefits it has.
228 * Do not use "fast" flag if you need the code to be robust.
230 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
231 int16_t *block, int n)
233 int level, i, j, run;
234 RLTable *rl = &ff_rl_mpeg1;
235 uint8_t *const scantable = s->intra_scantable.permutated;
236 const int qscale = s->qscale;
239 OPEN_READER(re, &s->gb);
241 // Special case for first coefficient, no need to add second VLC table.
242 UPDATE_CACHE(re, &s->gb);
243 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
244 level = (3 * qscale) >> 1;
245 level = (level - 1) | 1;
246 if (GET_CACHE(re, &s->gb) & 0x40000000)
250 SKIP_BITS(re, &s->gb, 2);
251 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
255 /* now quantify & encode AC coefficients */
257 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
265 level = ((level * 2 + 1) * qscale) >> 1;
266 level = (level - 1) | 1;
267 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
268 SHOW_SBITS(re, &s->gb, 1);
269 SKIP_BITS(re, &s->gb, 1);
272 run = SHOW_UBITS(re, &s->gb, 6) + 1;
273 LAST_SKIP_BITS(re, &s->gb, 6);
274 UPDATE_CACHE(re, &s->gb);
275 level = SHOW_SBITS(re, &s->gb, 8);
276 SKIP_BITS(re, &s->gb, 8);
278 level = SHOW_UBITS(re, &s->gb, 8) - 256;
279 SKIP_BITS(re, &s->gb, 8);
280 } else if (level == 0) {
281 level = SHOW_UBITS(re, &s->gb, 8);
282 SKIP_BITS(re, &s->gb, 8);
290 level = ((level * 2 + 1) * qscale) >> 1;
291 level = (level - 1) | 1;
294 level = ((level * 2 + 1) * qscale) >> 1;
295 level = (level - 1) | 1;
300 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
302 UPDATE_CACHE(re, &s->gb);
305 LAST_SKIP_BITS(re, &s->gb, 2);
306 CLOSE_READER(re, &s->gb);
309 check_scantable_index(s, i);
311 s->block_last_index[n] = i;
315 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
316 int16_t *block, int n)
318 int level, i, j, run;
319 RLTable *rl = &ff_rl_mpeg1;
320 uint8_t *const scantable = s->intra_scantable.permutated;
321 const uint16_t *quant_matrix;
322 const int qscale = s->qscale;
328 OPEN_READER(re, &s->gb);
331 quant_matrix = s->inter_matrix;
333 quant_matrix = s->chroma_inter_matrix;
335 // Special case for first coefficient, no need to add second VLC table.
336 UPDATE_CACHE(re, &s->gb);
337 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
338 level = (3 * qscale * quant_matrix[0]) >> 5;
339 if (GET_CACHE(re, &s->gb) & 0x40000000)
344 SKIP_BITS(re, &s->gb, 2);
345 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
349 /* now quantify & encode AC coefficients */
351 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
359 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
360 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
361 SHOW_SBITS(re, &s->gb, 1);
362 SKIP_BITS(re, &s->gb, 1);
365 run = SHOW_UBITS(re, &s->gb, 6) + 1;
366 LAST_SKIP_BITS(re, &s->gb, 6);
367 UPDATE_CACHE(re, &s->gb);
368 level = SHOW_SBITS(re, &s->gb, 12);
369 SKIP_BITS(re, &s->gb, 12);
376 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
379 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
385 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
387 UPDATE_CACHE(re, &s->gb);
390 LAST_SKIP_BITS(re, &s->gb, 2);
391 CLOSE_READER(re, &s->gb);
393 block[63] ^= (mismatch & 1);
395 check_scantable_index(s, i);
397 s->block_last_index[n] = i;
402 * Changing this would eat up any speed benefits it has.
403 * Do not use "fast" flag if you need the code to be robust.
405 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
406 int16_t *block, int n)
408 int level, i, j, run;
409 RLTable *rl = &ff_rl_mpeg1;
410 uint8_t *const scantable = s->intra_scantable.permutated;
411 const int qscale = s->qscale;
412 OPEN_READER(re, &s->gb);
415 // special case for first coefficient, no need to add second VLC table
416 UPDATE_CACHE(re, &s->gb);
417 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
418 level = (3 * qscale) >> 1;
419 if (GET_CACHE(re, &s->gb) & 0x40000000)
423 SKIP_BITS(re, &s->gb, 2);
424 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
428 /* now quantify & encode AC coefficients */
430 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
437 level = ((level * 2 + 1) * qscale) >> 1;
438 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
439 SHOW_SBITS(re, &s->gb, 1);
440 SKIP_BITS(re, &s->gb, 1);
443 run = SHOW_UBITS(re, &s->gb, 6) + 1;
444 LAST_SKIP_BITS(re, &s->gb, 6);
445 UPDATE_CACHE(re, &s->gb);
446 level = SHOW_SBITS(re, &s->gb, 12);
447 SKIP_BITS(re, &s->gb, 12);
454 level = ((-level * 2 + 1) * qscale) >> 1;
457 level = ((level * 2 + 1) * qscale) >> 1;
462 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
465 UPDATE_CACHE(re, &s->gb);
468 LAST_SKIP_BITS(re, &s->gb, 2);
469 CLOSE_READER(re, &s->gb);
471 check_scantable_index(s, i);
473 s->block_last_index[n] = i;
477 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
478 int16_t *block, int n)
480 int level, dc, diff, i, j, run;
483 uint8_t *const scantable = s->intra_scantable.permutated;
484 const uint16_t *quant_matrix;
485 const int qscale = s->qscale;
490 quant_matrix = s->intra_matrix;
493 quant_matrix = s->chroma_intra_matrix;
494 component = (n & 1) + 1;
496 diff = decode_dc(&s->gb, component);
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 SKIP_BITS(re, &s->gb, 6);
532 level = SHOW_SBITS(re, &s->gb, 12);
533 LAST_SKIP_BITS(re, &s->gb, 12);
539 level = (-level * qscale * quant_matrix[j]) >> 4;
542 level = (level * qscale * quant_matrix[j]) >> 4;
549 CLOSE_READER(re, &s->gb);
551 block[63] ^= mismatch & 1;
553 check_scantable_index(s, i);
555 s->block_last_index[n] = i;
560 * Changing this would eat up any speed benefits it has.
561 * Do not use "fast" flag if you need the code to be robust.
563 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
564 int16_t *block, int n)
566 int level, dc, diff, i, j, run;
569 uint8_t *const scantable = s->intra_scantable.permutated;
570 const uint16_t *quant_matrix;
571 const int qscale = s->qscale;
575 quant_matrix = s->intra_matrix;
578 quant_matrix = s->chroma_intra_matrix;
579 component = (n & 1) + 1;
581 diff = decode_dc(&s->gb, component);
582 dc = s->last_dc[component];
584 s->last_dc[component] = dc;
585 block[0] = dc * (1 << (3 - s->intra_dc_precision));
587 if (s->intra_vlc_format)
593 OPEN_READER(re, &s->gb);
594 /* now quantify & encode AC coefficients */
596 UPDATE_CACHE(re, &s->gb);
597 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
600 if (level >= 64 || i > 63) {
602 } else if (level != 0) {
605 level = (level * qscale * quant_matrix[j]) >> 4;
606 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
607 SHOW_SBITS(re, &s->gb, 1);
608 LAST_SKIP_BITS(re, &s->gb, 1);
611 run = SHOW_UBITS(re, &s->gb, 6) + 1;
612 SKIP_BITS(re, &s->gb, 6);
613 level = SHOW_SBITS(re, &s->gb, 12);
614 LAST_SKIP_BITS(re, &s->gb, 12);
618 level = (-level * qscale * quant_matrix[j]) >> 4;
621 level = (level * qscale * quant_matrix[j]) >> 4;
627 CLOSE_READER(re, &s->gb);
630 check_scantable_index(s, i);
632 s->block_last_index[n] = i;
636 /******************************************/
639 static inline int get_dmv(MpegEncContext *s)
641 if (get_bits1(&s->gb))
642 return 1 - (get_bits1(&s->gb) << 1);
647 /* motion type (for MPEG-2) */
653 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
655 int i, j, k, cbp, val, mb_type, motion_type;
656 const int mb_block_count = 4 + (1 << s->chroma_format);
659 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
661 av_assert2(s->mb_skipped == 0);
663 if (s->mb_skip_run-- != 0) {
664 if (s->pict_type == AV_PICTURE_TYPE_P) {
666 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
667 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
672 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
674 // FIXME not sure if this is allowed in MPEG at all
675 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
676 if (IS_INTRA(mb_type)) {
677 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
678 return AVERROR_INVALIDDATA;
680 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
681 mb_type | MB_TYPE_SKIP;
683 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
690 switch (s->pict_type) {
692 case AV_PICTURE_TYPE_I:
693 if (get_bits1(&s->gb) == 0) {
694 if (get_bits1(&s->gb) == 0) {
695 av_log(s->avctx, AV_LOG_ERROR,
696 "Invalid mb type in I-frame at %d %d\n",
698 return AVERROR_INVALIDDATA;
700 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
702 mb_type = MB_TYPE_INTRA;
705 case AV_PICTURE_TYPE_P:
706 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
708 av_log(s->avctx, AV_LOG_ERROR,
709 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
710 return AVERROR_INVALIDDATA;
712 mb_type = ptype2mb_type[mb_type];
714 case AV_PICTURE_TYPE_B:
715 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
717 av_log(s->avctx, AV_LOG_ERROR,
718 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
719 return AVERROR_INVALIDDATA;
721 mb_type = btype2mb_type[mb_type];
724 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
725 // motion_type = 0; /* avoid warning */
726 if (IS_INTRA(mb_type)) {
727 s->bdsp.clear_blocks(s->block[0]);
729 if (!s->chroma_y_shift)
730 s->bdsp.clear_blocks(s->block[6]);
732 /* compute DCT type */
733 // FIXME: add an interlaced_dct coded var?
734 if (s->picture_structure == PICT_FRAME &&
735 !s->frame_pred_frame_dct)
736 s->interlaced_dct = get_bits1(&s->gb);
738 if (IS_QUANT(mb_type))
739 s->qscale = mpeg_get_qscale(s);
741 if (s->concealment_motion_vectors) {
742 /* just parse them */
743 if (s->picture_structure != PICT_FRAME)
744 skip_bits1(&s->gb); /* field select */
747 s->last_mv[0][0][0] =
748 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
749 s->last_mv[0][0][0]);
751 s->last_mv[0][0][1] =
752 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
753 s->last_mv[0][0][1]);
755 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
757 /* reset mv prediction */
758 memset(s->last_mv, 0, sizeof(s->last_mv));
761 // if 1, we memcpy blocks in xvmcvideo
762 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
763 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
765 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
766 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
767 for (i = 0; i < 6; i++)
768 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
770 for (i = 0; i < mb_block_count; i++)
771 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
775 for (i = 0; i < 6; i++) {
776 ret = ff_mpeg1_decode_block_intra(&s->gb,
778 s->intra_scantable.permutated,
779 s->last_dc, *s->pblocks[i],
782 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
787 s->block_last_index[i] = ret;
791 if (mb_type & MB_TYPE_ZERO_MV) {
792 av_assert2(mb_type & MB_TYPE_CBP);
794 s->mv_dir = MV_DIR_FORWARD;
795 if (s->picture_structure == PICT_FRAME) {
796 if (s->picture_structure == PICT_FRAME
797 && !s->frame_pred_frame_dct)
798 s->interlaced_dct = get_bits1(&s->gb);
799 s->mv_type = MV_TYPE_16X16;
801 s->mv_type = MV_TYPE_FIELD;
802 mb_type |= MB_TYPE_INTERLACED;
803 s->field_select[0][0] = s->picture_structure - 1;
806 if (IS_QUANT(mb_type))
807 s->qscale = mpeg_get_qscale(s);
809 s->last_mv[0][0][0] = 0;
810 s->last_mv[0][0][1] = 0;
811 s->last_mv[0][1][0] = 0;
812 s->last_mv[0][1][1] = 0;
816 av_assert2(mb_type & MB_TYPE_L0L1);
817 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
818 /* get additional motion vector type */
819 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
820 motion_type = MT_FRAME;
822 motion_type = get_bits(&s->gb, 2);
823 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
824 s->interlaced_dct = get_bits1(&s->gb);
827 if (IS_QUANT(mb_type))
828 s->qscale = mpeg_get_qscale(s);
831 s->mv_dir = (mb_type >> 13) & 3;
832 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
833 switch (motion_type) {
834 case MT_FRAME: /* or MT_16X8 */
835 if (s->picture_structure == PICT_FRAME) {
836 mb_type |= MB_TYPE_16x16;
837 s->mv_type = MV_TYPE_16X16;
838 for (i = 0; i < 2; i++) {
839 if (USES_LIST(mb_type, i)) {
842 s->last_mv[i][0][0] =
843 s->last_mv[i][1][0] =
844 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
845 s->last_mv[i][0][0]);
847 s->last_mv[i][0][1] =
848 s->last_mv[i][1][1] =
849 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
850 s->last_mv[i][0][1]);
851 /* full_pel: only for MPEG-1 */
852 if (s->full_pel[i]) {
859 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
860 s->mv_type = MV_TYPE_16X8;
861 for (i = 0; i < 2; i++) {
862 if (USES_LIST(mb_type, i)) {
864 for (j = 0; j < 2; j++) {
865 s->field_select[i][j] = get_bits1(&s->gb);
866 for (k = 0; k < 2; k++) {
867 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
868 s->last_mv[i][j][k]);
869 s->last_mv[i][j][k] = val;
870 s->mv[i][j][k] = val;
878 s->mv_type = MV_TYPE_FIELD;
879 if (s->picture_structure == PICT_FRAME) {
880 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
881 for (i = 0; i < 2; i++) {
882 if (USES_LIST(mb_type, i)) {
883 for (j = 0; j < 2; j++) {
884 s->field_select[i][j] = get_bits1(&s->gb);
885 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
886 s->last_mv[i][j][0]);
887 s->last_mv[i][j][0] = val;
888 s->mv[i][j][0] = val;
889 ff_tlog(s->avctx, "fmx=%d\n", val);
890 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
891 s->last_mv[i][j][1] >> 1);
892 s->last_mv[i][j][1] = 2 * val;
893 s->mv[i][j][1] = val;
894 ff_tlog(s->avctx, "fmy=%d\n", val);
899 av_assert0(!s->progressive_sequence);
900 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
901 for (i = 0; i < 2; i++) {
902 if (USES_LIST(mb_type, i)) {
903 s->field_select[i][0] = get_bits1(&s->gb);
904 for (k = 0; k < 2; k++) {
905 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
906 s->last_mv[i][0][k]);
907 s->last_mv[i][0][k] = val;
908 s->last_mv[i][1][k] = val;
909 s->mv[i][0][k] = val;
916 if (s->progressive_sequence){
917 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
918 return AVERROR_INVALIDDATA;
920 s->mv_type = MV_TYPE_DMV;
921 for (i = 0; i < 2; i++) {
922 if (USES_LIST(mb_type, i)) {
923 int dmx, dmy, mx, my, m;
924 const int my_shift = s->picture_structure == PICT_FRAME;
926 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
927 s->last_mv[i][0][0]);
928 s->last_mv[i][0][0] = mx;
929 s->last_mv[i][1][0] = mx;
931 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
932 s->last_mv[i][0][1] >> my_shift);
936 s->last_mv[i][0][1] = my * (1 << my_shift);
937 s->last_mv[i][1][1] = my * (1 << my_shift);
941 s->mv[i][1][0] = mx; // not used
942 s->mv[i][1][1] = my; // not used
944 if (s->picture_structure == PICT_FRAME) {
945 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
947 // m = 1 + 2 * s->top_field_first;
948 m = s->top_field_first ? 1 : 3;
950 /* top -> top pred */
951 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
952 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
954 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
955 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
957 mb_type |= MB_TYPE_16x16;
959 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
960 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
961 if (s->picture_structure == PICT_TOP_FIELD)
970 av_log(s->avctx, AV_LOG_ERROR,
971 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
972 return AVERROR_INVALIDDATA;
977 if (HAS_CBP(mb_type)) {
978 s->bdsp.clear_blocks(s->block[0]);
980 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
981 if (mb_block_count > 6) {
982 cbp *= 1 << mb_block_count - 6;
983 cbp |= get_bits(&s->gb, mb_block_count - 6);
984 s->bdsp.clear_blocks(s->block[6]);
987 av_log(s->avctx, AV_LOG_ERROR,
988 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
989 return AVERROR_INVALIDDATA;
992 // if 1, we memcpy blocks in xvmcvideo
993 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
994 ff_xvmc_pack_pblocks(s, cbp);
996 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
997 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
998 for (i = 0; i < 6; i++) {
1000 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1002 s->block_last_index[i] = -1;
1006 cbp <<= 12 - mb_block_count;
1008 for (i = 0; i < mb_block_count; i++) {
1009 if (cbp & (1 << 11)) {
1010 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1013 s->block_last_index[i] = -1;
1019 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1020 for (i = 0; i < 6; i++) {
1022 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1024 s->block_last_index[i] = -1;
1028 for (i = 0; i < 6; i++) {
1030 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1033 s->block_last_index[i] = -1;
1040 for (i = 0; i < 12; i++)
1041 s->block_last_index[i] = -1;
1045 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1050 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1052 Mpeg1Context *s = avctx->priv_data;
1053 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1055 if ( avctx->codec_tag != AV_RL32("VCR2")
1056 && avctx->codec_tag != AV_RL32("BW10"))
1057 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1058 ff_mpv_decode_init(s2, avctx);
1060 s->mpeg_enc_ctx.avctx = avctx;
1062 /* we need some permutation to store matrices,
1063 * until the decoder sets the real permutation. */
1064 ff_mpv_idct_init(s2);
1065 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1066 ff_mpeg12_init_vlcs();
1068 s2->chroma_format = 1;
1069 s->mpeg_enc_ctx_allocated = 0;
1070 s->mpeg_enc_ctx.picture_number = 0;
1071 s->repeat_field = 0;
1072 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1073 avctx->color_range = AVCOL_RANGE_MPEG;
1078 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1079 const AVCodecContext *avctx_from)
1081 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1082 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1085 if (avctx == avctx_from ||
1086 !ctx_from->mpeg_enc_ctx_allocated ||
1087 !s1->context_initialized)
1090 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1094 if (!ctx->mpeg_enc_ctx_allocated)
1095 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1097 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1098 s->picture_number++;
1104 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1105 const uint8_t *new_perm)
1107 uint16_t temp_matrix[64];
1110 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1112 for (i = 0; i < 64; i++)
1113 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1116 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1117 #if CONFIG_MPEG1_NVDEC_HWACCEL
1120 #if CONFIG_MPEG1_XVMC_HWACCEL
1123 #if CONFIG_MPEG1_VDPAU_HWACCEL
1130 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1131 #if CONFIG_MPEG2_NVDEC_HWACCEL
1134 #if CONFIG_MPEG2_XVMC_HWACCEL
1137 #if CONFIG_MPEG2_VDPAU_HWACCEL
1140 #if CONFIG_MPEG2_DXVA2_HWACCEL
1141 AV_PIX_FMT_DXVA2_VLD,
1143 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1144 AV_PIX_FMT_D3D11VA_VLD,
1147 #if CONFIG_MPEG2_VAAPI_HWACCEL
1150 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1151 AV_PIX_FMT_VIDEOTOOLBOX,
1157 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1162 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1167 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1169 Mpeg1Context *s1 = avctx->priv_data;
1170 MpegEncContext *s = &s1->mpeg_enc_ctx;
1171 const enum AVPixelFormat *pix_fmts;
1173 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1174 return AV_PIX_FMT_GRAY8;
1176 if (s->chroma_format < 2)
1177 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1178 mpeg1_hwaccel_pixfmt_list_420 :
1179 mpeg2_hwaccel_pixfmt_list_420;
1180 else if (s->chroma_format == 2)
1181 pix_fmts = mpeg12_pixfmt_list_422;
1183 pix_fmts = mpeg12_pixfmt_list_444;
1185 return ff_thread_get_format(avctx, pix_fmts);
1188 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1190 // until then pix_fmt may be changed right after codec init
1192 if (avctx->idct_algo == FF_IDCT_AUTO)
1193 avctx->idct_algo = FF_IDCT_NONE;
1195 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1196 Mpeg1Context *s1 = avctx->priv_data;
1197 MpegEncContext *s = &s1->mpeg_enc_ctx;
1199 s->pack_pblocks = 1;
1203 /* Call this function when we know all parameters.
1204 * It may be called in different places for MPEG-1 and MPEG-2. */
1205 static int mpeg_decode_postinit(AVCodecContext *avctx)
1207 Mpeg1Context *s1 = avctx->priv_data;
1208 MpegEncContext *s = &s1->mpeg_enc_ctx;
1209 uint8_t old_permutation[64];
1212 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1214 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1215 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1218 if (s->aspect_ratio_info > 1) {
1220 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1221 (AVRational) { s1->pan_scan.width,
1222 s1->pan_scan.height }),
1223 (AVRational) { s->width, s->height });
1225 /* We ignore the spec here and guess a bit as reality does not
1226 * match the spec, see for example res_change_ffmpeg_aspect.ts
1227 * and sequence-display-aspect.mpg.
1228 * issue1613, 621, 562 */
1229 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1230 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1231 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1232 s->avctx->sample_aspect_ratio =
1233 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1234 (AVRational) { s->width, s->height });
1236 s->avctx->sample_aspect_ratio =
1237 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1238 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1239 // issue1613 4/3 16/9 -> 16/9
1240 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1241 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1242 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1243 ff_dlog(avctx, "aspect A %d/%d\n",
1244 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1245 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1246 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1247 s->avctx->sample_aspect_ratio.den);
1250 s->avctx->sample_aspect_ratio =
1251 ff_mpeg2_aspect[s->aspect_ratio_info];
1255 if (av_image_check_sar(s->width, s->height,
1256 avctx->sample_aspect_ratio) < 0) {
1257 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1258 avctx->sample_aspect_ratio.num,
1259 avctx->sample_aspect_ratio.den);
1260 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1263 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1264 avctx->coded_width != s->width ||
1265 avctx->coded_height != s->height ||
1266 s1->save_width != s->width ||
1267 s1->save_height != s->height ||
1268 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1269 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1271 if (s1->mpeg_enc_ctx_allocated) {
1272 ParseContext pc = s->parse_context;
1273 s->parse_context.buffer = 0;
1274 ff_mpv_common_end(s);
1275 s->parse_context = pc;
1276 s1->mpeg_enc_ctx_allocated = 0;
1279 ret = ff_set_dimensions(avctx, s->width, s->height);
1283 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1284 avctx->rc_max_rate = s->bit_rate;
1285 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1286 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1287 avctx->bit_rate = s->bit_rate;
1289 s1->save_aspect = s->avctx->sample_aspect_ratio;
1290 s1->save_width = s->width;
1291 s1->save_height = s->height;
1292 s1->save_progressive_seq = s->progressive_sequence;
1294 /* low_delay may be forced, in this case we will have B-frames
1295 * that behave like P-frames. */
1296 avctx->has_b_frames = !s->low_delay;
1298 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1300 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1301 avctx->ticks_per_frame = 1;
1303 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1306 av_reduce(&s->avctx->framerate.num,
1307 &s->avctx->framerate.den,
1308 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1309 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1311 avctx->ticks_per_frame = 2;
1313 switch (s->chroma_format) {
1314 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1316 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1317 default: av_assert0(0);
1321 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1322 setup_hwaccel_for_pixfmt(avctx);
1324 /* Quantization matrices may need reordering
1325 * if DCT permutation is changed. */
1326 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1328 ff_mpv_idct_init(s);
1329 if ((ret = ff_mpv_common_init(s)) < 0)
1332 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1333 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1334 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1335 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1337 s1->mpeg_enc_ctx_allocated = 1;
1342 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1345 Mpeg1Context *s1 = avctx->priv_data;
1346 MpegEncContext *s = &s1->mpeg_enc_ctx;
1347 int ref, f_code, vbv_delay;
1349 init_get_bits(&s->gb, buf, buf_size * 8);
1351 ref = get_bits(&s->gb, 10); /* temporal ref */
1352 s->pict_type = get_bits(&s->gb, 3);
1353 if (s->pict_type == 0 || s->pict_type > 3)
1354 return AVERROR_INVALIDDATA;
1356 vbv_delay = get_bits(&s->gb, 16);
1357 s->vbv_delay = vbv_delay;
1358 if (s->pict_type == AV_PICTURE_TYPE_P ||
1359 s->pict_type == AV_PICTURE_TYPE_B) {
1360 s->full_pel[0] = get_bits1(&s->gb);
1361 f_code = get_bits(&s->gb, 3);
1362 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1363 return AVERROR_INVALIDDATA;
1365 s->mpeg_f_code[0][0] = f_code;
1366 s->mpeg_f_code[0][1] = f_code;
1368 if (s->pict_type == AV_PICTURE_TYPE_B) {
1369 s->full_pel[1] = get_bits1(&s->gb);
1370 f_code = get_bits(&s->gb, 3);
1371 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1372 return AVERROR_INVALIDDATA;
1374 s->mpeg_f_code[1][0] = f_code;
1375 s->mpeg_f_code[1][1] = f_code;
1377 s->current_picture.f->pict_type = s->pict_type;
1378 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1380 if (avctx->debug & FF_DEBUG_PICT_INFO)
1381 av_log(avctx, AV_LOG_DEBUG,
1382 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1389 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1391 MpegEncContext *s = &s1->mpeg_enc_ctx;
1392 int horiz_size_ext, vert_size_ext;
1394 AVCPBProperties *cpb_props;
1396 skip_bits(&s->gb, 1); /* profile and level esc*/
1397 s->avctx->profile = get_bits(&s->gb, 3);
1398 s->avctx->level = get_bits(&s->gb, 4);
1399 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1400 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1402 if (!s->chroma_format) {
1403 s->chroma_format = 1;
1404 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1407 horiz_size_ext = get_bits(&s->gb, 2);
1408 vert_size_ext = get_bits(&s->gb, 2);
1409 s->width |= (horiz_size_ext << 12);
1410 s->height |= (vert_size_ext << 12);
1411 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1412 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1413 check_marker(s->avctx, &s->gb, "after bit rate extension");
1414 s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1416 s->low_delay = get_bits1(&s->gb);
1417 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1420 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1421 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1423 ff_dlog(s->avctx, "sequence extension\n");
1424 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1426 if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1427 cpb_props->buffer_size = s1->rc_buffer_size;
1428 if (s->bit_rate != 0x3FFFF*400)
1429 cpb_props->max_bitrate = s->bit_rate;
1432 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1433 av_log(s->avctx, AV_LOG_DEBUG,
1434 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1435 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1436 s1->rc_buffer_size, s->bit_rate);
1439 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1441 MpegEncContext *s = &s1->mpeg_enc_ctx;
1442 int color_description, w, h;
1444 skip_bits(&s->gb, 3); /* video format */
1445 color_description = get_bits1(&s->gb);
1446 if (color_description) {
1447 s->avctx->color_primaries = get_bits(&s->gb, 8);
1448 s->avctx->color_trc = get_bits(&s->gb, 8);
1449 s->avctx->colorspace = get_bits(&s->gb, 8);
1451 w = get_bits(&s->gb, 14);
1452 skip_bits(&s->gb, 1); // marker
1453 h = get_bits(&s->gb, 14);
1454 // remaining 3 bits are zero padding
1456 s1->pan_scan.width = 16 * w;
1457 s1->pan_scan.height = 16 * h;
1459 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1460 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1463 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1465 MpegEncContext *s = &s1->mpeg_enc_ctx;
1469 if (s->progressive_sequence) {
1470 if (s->repeat_first_field) {
1472 if (s->top_field_first)
1476 if (s->picture_structure == PICT_FRAME) {
1478 if (s->repeat_first_field)
1482 for (i = 0; i < nofco; i++) {
1483 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1484 skip_bits(&s->gb, 1); // marker
1485 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1486 skip_bits(&s->gb, 1); // marker
1489 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1490 av_log(s->avctx, AV_LOG_DEBUG,
1491 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1492 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1493 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1494 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1497 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1498 uint16_t matrix1[64], int intra)
1502 for (i = 0; i < 64; i++) {
1503 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1504 int v = get_bits(&s->gb, 8);
1506 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1507 return AVERROR_INVALIDDATA;
1509 if (intra && i == 0 && v != 8) {
1510 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1511 v = 8; // needed by pink.mpg / issue1046
1520 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1522 ff_dlog(s->avctx, "matrix extension\n");
1524 if (get_bits1(&s->gb))
1525 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1526 if (get_bits1(&s->gb))
1527 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1528 if (get_bits1(&s->gb))
1529 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1530 if (get_bits1(&s->gb))
1531 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1534 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1536 MpegEncContext *s = &s1->mpeg_enc_ctx;
1538 s->full_pel[0] = s->full_pel[1] = 0;
1539 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1540 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1541 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1542 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1543 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1544 av_log(s->avctx, AV_LOG_ERROR,
1545 "Missing picture start code, guessing missing values\n");
1546 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1547 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1548 s->pict_type = AV_PICTURE_TYPE_I;
1550 s->pict_type = AV_PICTURE_TYPE_P;
1552 s->pict_type = AV_PICTURE_TYPE_B;
1553 s->current_picture.f->pict_type = s->pict_type;
1554 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1556 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1557 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1558 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1559 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1561 s->intra_dc_precision = get_bits(&s->gb, 2);
1562 s->picture_structure = get_bits(&s->gb, 2);
1563 s->top_field_first = get_bits1(&s->gb);
1564 s->frame_pred_frame_dct = get_bits1(&s->gb);
1565 s->concealment_motion_vectors = get_bits1(&s->gb);
1566 s->q_scale_type = get_bits1(&s->gb);
1567 s->intra_vlc_format = get_bits1(&s->gb);
1568 s->alternate_scan = get_bits1(&s->gb);
1569 s->repeat_first_field = get_bits1(&s->gb);
1570 s->chroma_420_type = get_bits1(&s->gb);
1571 s->progressive_frame = get_bits1(&s->gb);
1573 if (s->alternate_scan) {
1574 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1575 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1577 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1578 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1581 /* composite display not parsed */
1582 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1583 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1584 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1585 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1586 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1587 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1588 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1589 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1590 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1593 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1595 AVCodecContext *avctx = s->avctx;
1596 Mpeg1Context *s1 = (Mpeg1Context *) s;
1599 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1600 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1601 return AVERROR_INVALIDDATA;
1604 /* start frame decoding */
1605 if (s->first_field || s->picture_structure == PICT_FRAME) {
1606 AVFrameSideData *pan_scan;
1608 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1611 ff_mpeg_er_frame_start(s);
1613 /* first check if we must repeat the frame */
1614 s->current_picture_ptr->f->repeat_pict = 0;
1615 if (s->repeat_first_field) {
1616 if (s->progressive_sequence) {
1617 if (s->top_field_first)
1618 s->current_picture_ptr->f->repeat_pict = 4;
1620 s->current_picture_ptr->f->repeat_pict = 2;
1621 } else if (s->progressive_frame) {
1622 s->current_picture_ptr->f->repeat_pict = 1;
1626 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1627 AV_FRAME_DATA_PANSCAN,
1628 sizeof(s1->pan_scan));
1630 return AVERROR(ENOMEM);
1631 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1633 if (s1->a53_buf_ref) {
1634 AVFrameSideData *sd = av_frame_new_side_data_from_buf(
1635 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1638 av_buffer_unref(&s1->a53_buf_ref);
1639 s1->a53_buf_ref = NULL;
1642 if (s1->has_stereo3d) {
1643 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1645 return AVERROR(ENOMEM);
1647 *stereo = s1->stereo3d;
1648 s1->has_stereo3d = 0;
1652 AVFrameSideData *sd =
1653 av_frame_new_side_data(s->current_picture_ptr->f,
1654 AV_FRAME_DATA_AFD, 1);
1656 return AVERROR(ENOMEM);
1658 *sd->data = s1->afd;
1662 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1663 ff_thread_finish_setup(avctx);
1664 } else { // second field
1667 if (!s->current_picture_ptr) {
1668 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1669 return AVERROR_INVALIDDATA;
1672 if (s->avctx->hwaccel) {
1673 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1674 av_log(avctx, AV_LOG_ERROR,
1675 "hardware accelerator failed to decode first field\n");
1680 for (i = 0; i < 4; i++) {
1681 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1682 if (s->picture_structure == PICT_BOTTOM_FIELD)
1683 s->current_picture.f->data[i] +=
1684 s->current_picture_ptr->f->linesize[i];
1688 if (avctx->hwaccel) {
1689 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1696 #define DECODE_SLICE_ERROR -1
1697 #define DECODE_SLICE_OK 0
1701 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1702 * @return DECODE_SLICE_ERROR if the slice is damaged,
1703 * DECODE_SLICE_OK if this slice is OK
1705 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1706 const uint8_t **buf, int buf_size)
1708 AVCodecContext *avctx = s->avctx;
1709 const int lowres = s->avctx->lowres;
1710 const int field_pic = s->picture_structure != PICT_FRAME;
1714 s->resync_mb_y = -1;
1716 av_assert0(mb_y < s->mb_height);
1718 init_get_bits(&s->gb, *buf, buf_size * 8);
1719 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1720 skip_bits(&s->gb, 3);
1722 ff_mpeg1_clean_buffers(s);
1723 s->interlaced_dct = 0;
1725 s->qscale = mpeg_get_qscale(s);
1727 if (s->qscale == 0) {
1728 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1729 return AVERROR_INVALIDDATA;
1732 /* extra slice info */
1733 if (skip_1stop_8data_bits(&s->gb) < 0)
1734 return AVERROR_INVALIDDATA;
1738 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1741 while (get_bits_left(&s->gb) > 0) {
1742 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1743 MBINCR_VLC_BITS, 2);
1745 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1746 return AVERROR_INVALIDDATA;
1751 /* otherwise, stuffing, nothing to do */
1759 if (s->mb_x >= (unsigned) s->mb_width) {
1760 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1761 return AVERROR_INVALIDDATA;
1764 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1765 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1766 int start_code = -1;
1767 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1768 if (buf_end < *buf + buf_size)
1771 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1772 return DECODE_SLICE_ERROR;
1774 return DECODE_SLICE_OK;
1777 s->resync_mb_x = s->mb_x;
1778 s->resync_mb_y = s->mb_y = mb_y;
1780 ff_init_block_index(s);
1782 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1783 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1784 av_log(s->avctx, AV_LOG_DEBUG,
1785 "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",
1787 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1788 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1789 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1790 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1791 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1792 s->progressive_sequence ? "ps" : "",
1793 s->progressive_frame ? "pf" : "",
1794 s->alternate_scan ? "alt" : "",
1795 s->top_field_first ? "top" : "",
1796 s->intra_dc_precision, s->picture_structure,
1797 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1798 s->q_scale_type, s->intra_vlc_format,
1799 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1804 // If 1, we memcpy blocks in xvmcvideo.
1805 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1806 ff_xvmc_init_block(s); // set s->block
1808 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1811 // Note motion_val is normally NULL unless we want to extract the MVs.
1812 if (s->current_picture.motion_val[0] && !s->encoding) {
1813 const int wrap = s->b8_stride;
1814 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1815 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1816 int motion_x, motion_y, dir, i;
1818 for (i = 0; i < 2; i++) {
1819 for (dir = 0; dir < 2; dir++) {
1821 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1822 motion_x = motion_y = 0;
1823 } else if (s->mv_type == MV_TYPE_16X16 ||
1824 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1825 motion_x = s->mv[dir][0][0];
1826 motion_y = s->mv[dir][0][1];
1827 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1828 motion_x = s->mv[dir][i][0];
1829 motion_y = s->mv[dir][i][1];
1832 s->current_picture.motion_val[dir][xy][0] = motion_x;
1833 s->current_picture.motion_val[dir][xy][1] = motion_y;
1834 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1835 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1836 s->current_picture.ref_index [dir][b8_xy] =
1837 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1838 av_assert2(s->field_select[dir][i] == 0 ||
1839 s->field_select[dir][i] == 1);
1846 s->dest[0] += 16 >> lowres;
1847 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1848 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1850 ff_mpv_reconstruct_mb(s, s->block);
1852 if (++s->mb_x >= s->mb_width) {
1853 const int mb_size = 16 >> s->avctx->lowres;
1856 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1857 ff_mpv_report_decode_progress(s);
1860 s->mb_y += 1 << field_pic;
1862 if (s->mb_y >= s->mb_height) {
1863 int left = get_bits_left(&s->gb);
1864 int is_d10 = s->chroma_format == 2 &&
1865 s->pict_type == AV_PICTURE_TYPE_I &&
1866 avctx->profile == 0 && avctx->level == 5 &&
1867 s->intra_dc_precision == 2 &&
1868 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1869 s->progressive_frame == 0
1870 /* vbv_delay == 0xBBB || 0xE10 */;
1872 if (left >= 32 && !is_d10) {
1873 GetBitContext gb = s->gb;
1874 align_get_bits(&gb);
1875 if (show_bits(&gb, 24) == 0x060E2B) {
1876 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1879 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1880 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1886 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1887 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1888 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1889 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1890 return AVERROR_INVALIDDATA;
1894 // There are some files out there which are missing the last slice
1895 // in cases where the slice is completely outside the visible
1896 // area, we detect this here instead of running into the end expecting
1898 left = get_bits_left(&s->gb);
1899 if (s->mb_y >= ((s->height + 15) >> 4) &&
1900 !s->progressive_sequence &&
1903 s->mb_skip_run == -1 &&
1904 (!left || show_bits(&s->gb, left) == 0))
1907 ff_init_block_index(s);
1910 /* skip mb handling */
1911 if (s->mb_skip_run == -1) {
1912 /* read increment again */
1915 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1916 MBINCR_VLC_BITS, 2);
1918 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1919 return AVERROR_INVALIDDATA;
1923 s->mb_skip_run += 33;
1924 } else if (code == 35) {
1925 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1926 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1927 return AVERROR_INVALIDDATA;
1929 goto eos; /* end of slice */
1931 /* otherwise, stuffing, nothing to do */
1933 s->mb_skip_run += code;
1937 if (s->mb_skip_run) {
1939 if (s->pict_type == AV_PICTURE_TYPE_I) {
1940 av_log(s->avctx, AV_LOG_ERROR,
1941 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1942 return AVERROR_INVALIDDATA;
1947 for (i = 0; i < 12; i++)
1948 s->block_last_index[i] = -1;
1949 if (s->picture_structure == PICT_FRAME)
1950 s->mv_type = MV_TYPE_16X16;
1952 s->mv_type = MV_TYPE_FIELD;
1953 if (s->pict_type == AV_PICTURE_TYPE_P) {
1954 /* if P type, zero motion vector is implied */
1955 s->mv_dir = MV_DIR_FORWARD;
1956 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1957 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1958 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1959 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1961 /* if B type, reuse previous vectors and directions */
1962 s->mv[0][0][0] = s->last_mv[0][0][0];
1963 s->mv[0][0][1] = s->last_mv[0][0][1];
1964 s->mv[1][0][0] = s->last_mv[1][0][0];
1965 s->mv[1][0][1] = s->last_mv[1][0][1];
1966 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1967 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1972 eos: // end of slice
1973 if (get_bits_left(&s->gb) < 0) {
1974 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1975 return AVERROR_INVALIDDATA;
1977 *buf += (get_bits_count(&s->gb) - 1) / 8;
1978 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);
1982 static int slice_decode_thread(AVCodecContext *c, void *arg)
1984 MpegEncContext *s = *(void **) arg;
1985 const uint8_t *buf = s->gb.buffer;
1986 int mb_y = s->start_mb_y;
1987 const int field_pic = s->picture_structure != PICT_FRAME;
1989 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1992 uint32_t start_code;
1995 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1997 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1998 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1999 s->start_mb_y, s->end_mb_y, s->er.error_count);
2001 if (c->err_recognition & AV_EF_EXPLODE)
2003 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2004 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2006 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2008 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2009 s->mb_x - 1, s->mb_y,
2010 ER_AC_END | ER_DC_END | ER_MV_END);
2013 if (s->mb_y == s->end_mb_y)
2017 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2018 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2019 return AVERROR_INVALIDDATA;
2020 mb_y = start_code - SLICE_MIN_START_CODE;
2021 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2022 mb_y += (*buf&0xE0)<<2;
2024 if (s->picture_structure == PICT_BOTTOM_FIELD)
2026 if (mb_y >= s->end_mb_y)
2027 return AVERROR_INVALIDDATA;
2032 * Handle slice ends.
2033 * @return 1 if it seems to be the last slice
2035 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2037 Mpeg1Context *s1 = avctx->priv_data;
2038 MpegEncContext *s = &s1->mpeg_enc_ctx;
2040 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2043 if (s->avctx->hwaccel) {
2044 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2046 av_log(avctx, AV_LOG_ERROR,
2047 "hardware accelerator failed to decode picture\n");
2052 /* end of slice reached */
2053 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2056 ff_er_frame_end(&s->er);
2058 ff_mpv_frame_end(s);
2060 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2061 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2064 ff_print_debug_info(s, s->current_picture_ptr, pict);
2065 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2067 if (avctx->active_thread_type & FF_THREAD_FRAME)
2068 s->picture_number++;
2069 /* latency of 1 frame for I- and P-frames */
2070 /* XXX: use another variable than picture_number */
2071 if (s->last_picture_ptr) {
2072 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2075 ff_print_debug_info(s, s->last_picture_ptr, pict);
2076 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2086 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2087 const uint8_t *buf, int buf_size)
2089 Mpeg1Context *s1 = avctx->priv_data;
2090 MpegEncContext *s = &s1->mpeg_enc_ctx;
2094 init_get_bits(&s->gb, buf, buf_size * 8);
2096 width = get_bits(&s->gb, 12);
2097 height = get_bits(&s->gb, 12);
2098 if (width == 0 || height == 0) {
2099 av_log(avctx, AV_LOG_WARNING,
2100 "Invalid horizontal or vertical size value.\n");
2101 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2102 return AVERROR_INVALIDDATA;
2104 s->aspect_ratio_info = get_bits(&s->gb, 4);
2105 if (s->aspect_ratio_info == 0) {
2106 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2107 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2108 return AVERROR_INVALIDDATA;
2110 s->frame_rate_index = get_bits(&s->gb, 4);
2111 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2112 av_log(avctx, AV_LOG_WARNING,
2113 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2114 s->frame_rate_index = 1;
2116 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2117 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2118 return AVERROR_INVALIDDATA;
2121 s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2122 skip_bits(&s->gb, 1);
2125 if (get_bits1(&s->gb)) {
2126 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2128 for (i = 0; i < 64; i++) {
2129 j = s->idsp.idct_permutation[i];
2130 v = ff_mpeg1_default_intra_matrix[i];
2131 s->intra_matrix[j] = v;
2132 s->chroma_intra_matrix[j] = v;
2135 if (get_bits1(&s->gb)) {
2136 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2138 for (i = 0; i < 64; i++) {
2139 int j = s->idsp.idct_permutation[i];
2140 v = ff_mpeg1_default_non_intra_matrix[i];
2141 s->inter_matrix[j] = v;
2142 s->chroma_inter_matrix[j] = v;
2146 if (show_bits(&s->gb, 23) != 0) {
2147 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2148 return AVERROR_INVALIDDATA;
2154 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2155 s->progressive_sequence = 1;
2156 s->progressive_frame = 1;
2157 s->picture_structure = PICT_FRAME;
2159 s->frame_pred_frame_dct = 1;
2160 s->chroma_format = 1;
2162 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2163 s->out_format = FMT_MPEG1;
2164 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2165 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2168 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2169 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2170 s1->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2175 static int vcr2_init_sequence(AVCodecContext *avctx)
2177 Mpeg1Context *s1 = avctx->priv_data;
2178 MpegEncContext *s = &s1->mpeg_enc_ctx;
2181 /* start new MPEG-1 context decoding */
2182 s->out_format = FMT_MPEG1;
2183 if (s1->mpeg_enc_ctx_allocated) {
2184 ff_mpv_common_end(s);
2185 s1->mpeg_enc_ctx_allocated = 0;
2187 s->width = avctx->coded_width;
2188 s->height = avctx->coded_height;
2189 avctx->has_b_frames = 0; // true?
2192 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2193 setup_hwaccel_for_pixfmt(avctx);
2195 ff_mpv_idct_init(s);
2196 if ((ret = ff_mpv_common_init(s)) < 0)
2198 s1->mpeg_enc_ctx_allocated = 1;
2200 for (i = 0; i < 64; i++) {
2201 int j = s->idsp.idct_permutation[i];
2202 v = ff_mpeg1_default_intra_matrix[i];
2203 s->intra_matrix[j] = v;
2204 s->chroma_intra_matrix[j] = v;
2206 v = ff_mpeg1_default_non_intra_matrix[i];
2207 s->inter_matrix[j] = v;
2208 s->chroma_inter_matrix[j] = v;
2211 s->progressive_sequence = 1;
2212 s->progressive_frame = 1;
2213 s->picture_structure = PICT_FRAME;
2215 s->frame_pred_frame_dct = 1;
2216 s->chroma_format = 1;
2217 if (s->codec_tag == AV_RL32("BW10")) {
2218 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2220 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2221 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2223 s1->save_width = s->width;
2224 s1->save_height = s->height;
2225 s1->save_progressive_seq = s->progressive_sequence;
2229 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2230 const uint8_t *p, int buf_size)
2232 Mpeg1Context *s1 = avctx->priv_data;
2234 if (buf_size >= 6 &&
2235 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2236 p[4] == 3 && (p[5] & 0x40)) {
2237 /* extract A53 Part 4 CC data */
2238 int cc_count = p[5] & 0x1f;
2239 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2240 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2241 const uint64_t new_size = (old_size + cc_count
2245 if (new_size > 3*A53_MAX_CC_COUNT)
2246 return AVERROR(EINVAL);
2248 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2250 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
2252 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2255 } else if (buf_size >= 2 &&
2256 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2257 /* extract SCTE-20 CC data */
2262 init_get_bits(&gb, p + 2, buf_size - 2);
2263 cc_count = get_bits(&gb, 5);
2265 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2266 const uint64_t new_size = (old_size + cc_count
2268 if (new_size > 3*A53_MAX_CC_COUNT)
2269 return AVERROR(EINVAL);
2271 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2273 uint8_t field, cc1, cc2;
2274 uint8_t *cap = s1->a53_buf_ref->data;
2276 memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3);
2277 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2278 skip_bits(&gb, 2); // priority
2279 field = get_bits(&gb, 2);
2280 skip_bits(&gb, 5); // line_offset
2281 cc1 = get_bits(&gb, 8);
2282 cc2 = get_bits(&gb, 8);
2283 skip_bits(&gb, 1); // marker
2285 if (!field) { // forbidden
2286 cap[0] = cap[1] = cap[2] = 0x00;
2288 field = (field == 2 ? 1 : 0);
2289 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2290 cap[0] = 0x04 | field;
2291 cap[1] = ff_reverse[cc1];
2292 cap[2] = ff_reverse[cc2];
2297 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2300 } else if (buf_size >= 11 &&
2301 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2302 /* extract DVD CC data
2304 * uint32_t user_data_start_code 0x000001B2 (big endian)
2305 * uint16_t user_identifier 0x4343 "CC"
2306 * uint8_t user_data_type_code 0x01
2307 * uint8_t caption_block_size 0xF8
2309 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2310 * bit 6 caption_filler 0
2311 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2312 * bit 0 caption_extra_field_added 1=one additional caption word
2314 * struct caption_field_block {
2316 * bit 7:1 caption_filler 0x7F (all 1s)
2317 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2318 * uint8_t caption_first_byte
2319 * uint8_t caption_second_byte
2320 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2322 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2323 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2324 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2325 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2326 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2329 // There is a caption count field in the data, but it is often
2330 // incorrect. So count the number of captions present.
2331 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2333 // Transform the DVD format into A53 Part 4 format
2335 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2336 const uint64_t new_size = (old_size + cc_count
2338 if (new_size > 3*A53_MAX_CC_COUNT)
2339 return AVERROR(EINVAL);
2341 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2343 uint8_t field1 = !!(p[4] & 0x80);
2344 uint8_t *cap = s1->a53_buf_ref->data;
2346 for (i = 0; i < cc_count; i++) {
2347 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2350 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2357 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2364 static void mpeg_decode_user_data(AVCodecContext *avctx,
2365 const uint8_t *p, int buf_size)
2367 Mpeg1Context *s = avctx->priv_data;
2368 const uint8_t *buf_end = p + buf_size;
2369 Mpeg1Context *s1 = avctx->priv_data;
2373 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2374 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2376 av_log(avctx, AV_LOG_ERROR, "\n");
2382 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2386 /* we parse the DTG active format information */
2387 if (buf_end - p >= 5 &&
2388 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2396 if (buf_end - p < 1)
2399 s1->afd = p[0] & 0x0f;
2401 } else if (buf_end - p >= 6 &&
2402 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2403 p[4] == 0x03) { // S3D_video_format_length
2404 // the 0x7F mask ignores the reserved_bit value
2405 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2407 if (S3D_video_format_type == 0x03 ||
2408 S3D_video_format_type == 0x04 ||
2409 S3D_video_format_type == 0x08 ||
2410 S3D_video_format_type == 0x23) {
2412 s1->has_stereo3d = 1;
2414 switch (S3D_video_format_type) {
2416 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2419 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2422 s1->stereo3d.type = AV_STEREO3D_2D;
2425 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2429 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2434 static void mpeg_decode_gop(AVCodecContext *avctx,
2435 const uint8_t *buf, int buf_size)
2437 Mpeg1Context *s1 = avctx->priv_data;
2438 MpegEncContext *s = &s1->mpeg_enc_ctx;
2442 init_get_bits(&s->gb, buf, buf_size * 8);
2444 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2446 #if FF_API_PRIVATE_OPT
2447 FF_DISABLE_DEPRECATION_WARNINGS
2448 avctx->timecode_frame_start = tc;
2449 FF_ENABLE_DEPRECATION_WARNINGS
2452 s->closed_gop = get_bits1(&s->gb);
2453 /* broken_link indicates that after editing the
2454 * reference frames of the first B-Frames after GOP I-Frame
2455 * are missing (open gop) */
2456 broken_link = get_bits1(&s->gb);
2458 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2459 char tcbuf[AV_TIMECODE_STR_SIZE];
2460 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2461 av_log(s->avctx, AV_LOG_DEBUG,
2462 "GOP (%s) closed_gop=%d broken_link=%d\n",
2463 tcbuf, s->closed_gop, broken_link);
2467 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2468 int *got_output, const uint8_t *buf, int buf_size)
2470 Mpeg1Context *s = avctx->priv_data;
2471 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2472 const uint8_t *buf_ptr = buf;
2473 const uint8_t *buf_end = buf + buf_size;
2474 int ret, input_size;
2475 int last_code = 0, skip_frame = 0;
2476 int picture_start_code_seen = 0;
2479 /* find next start code */
2480 uint32_t start_code = -1;
2481 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2482 if (start_code > 0x1ff) {
2485 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2488 av_assert0(avctx->thread_count > 1);
2490 avctx->execute(avctx, slice_decode_thread,
2491 &s2->thread_context[0], NULL,
2492 s->slice_count, sizeof(void *));
2493 for (i = 0; i < s->slice_count; i++)
2494 s2->er.error_count += s2->thread_context[i]->er.error_count;
2497 ret = slice_end(avctx, picture);
2501 // FIXME: merge with the stuff in mpeg_decode_slice
2502 if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2508 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2509 return AVERROR_INVALIDDATA;
2511 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2514 input_size = buf_end - buf_ptr;
2516 if (avctx->debug & FF_DEBUG_STARTCODE)
2517 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2518 start_code, buf_ptr - buf, input_size);
2520 /* prepare data for next start code */
2521 switch (start_code) {
2522 case SEQ_START_CODE:
2523 if (last_code == 0) {
2524 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2525 if (buf != avctx->extradata)
2528 av_log(avctx, AV_LOG_ERROR,
2529 "ignoring SEQ_START_CODE after %X\n", last_code);
2530 if (avctx->err_recognition & AV_EF_EXPLODE)
2531 return AVERROR_INVALIDDATA;
2535 case PICTURE_START_CODE:
2536 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2537 /* If it's a frame picture, there can't be more than one picture header.
2538 Yet, it does happen and we need to handle it. */
2539 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2542 picture_start_code_seen = 1;
2544 if (s2->width <= 0 || s2->height <= 0) {
2545 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2546 s2->width, s2->height);
2547 return AVERROR_INVALIDDATA;
2551 s2->intra_dc_precision= 3;
2552 s2->intra_matrix[0]= 1;
2554 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2555 !avctx->hwaccel && s->slice_count) {
2558 avctx->execute(avctx, slice_decode_thread,
2559 s2->thread_context, NULL,
2560 s->slice_count, sizeof(void *));
2561 for (i = 0; i < s->slice_count; i++)
2562 s2->er.error_count += s2->thread_context[i]->er.error_count;
2565 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2566 ret = mpeg_decode_postinit(avctx);
2568 av_log(avctx, AV_LOG_ERROR,
2569 "mpeg_decode_postinit() failure\n");
2573 /* We have a complete image: we try to decompress it. */
2574 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2577 last_code = PICTURE_START_CODE;
2579 av_log(avctx, AV_LOG_ERROR,
2580 "ignoring pic after %X\n", last_code);
2581 if (avctx->err_recognition & AV_EF_EXPLODE)
2582 return AVERROR_INVALIDDATA;
2585 case EXT_START_CODE:
2586 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2588 switch (get_bits(&s2->gb, 4)) {
2590 if (last_code == 0) {
2591 mpeg_decode_sequence_extension(s);
2593 av_log(avctx, AV_LOG_ERROR,
2594 "ignoring seq ext after %X\n", last_code);
2595 if (avctx->err_recognition & AV_EF_EXPLODE)
2596 return AVERROR_INVALIDDATA;
2600 mpeg_decode_sequence_display_extension(s);
2603 mpeg_decode_quant_matrix_extension(s2);
2606 mpeg_decode_picture_display_extension(s);
2609 if (last_code == PICTURE_START_CODE) {
2610 mpeg_decode_picture_coding_extension(s);
2612 av_log(avctx, AV_LOG_ERROR,
2613 "ignoring pic cod ext after %X\n", last_code);
2614 if (avctx->err_recognition & AV_EF_EXPLODE)
2615 return AVERROR_INVALIDDATA;
2620 case USER_START_CODE:
2621 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2623 case GOP_START_CODE:
2624 if (last_code == 0) {
2625 s2->first_field = 0;
2626 mpeg_decode_gop(avctx, buf_ptr, input_size);
2629 av_log(avctx, AV_LOG_ERROR,
2630 "ignoring GOP_START_CODE after %X\n", last_code);
2631 if (avctx->err_recognition & AV_EF_EXPLODE)
2632 return AVERROR_INVALIDDATA;
2636 if (start_code >= SLICE_MIN_START_CODE &&
2637 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2638 if (s2->progressive_sequence && !s2->progressive_frame) {
2639 s2->progressive_frame = 1;
2640 av_log(s2->avctx, AV_LOG_ERROR,
2641 "interlaced frame in progressive sequence, ignoring\n");
2644 if (s2->picture_structure == 0 ||
2645 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2646 av_log(s2->avctx, AV_LOG_ERROR,
2647 "picture_structure %d invalid, ignoring\n",
2648 s2->picture_structure);
2649 s2->picture_structure = PICT_FRAME;
2652 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2653 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2655 if (s2->picture_structure == PICT_FRAME) {
2656 s2->first_field = 0;
2657 s2->v_edge_pos = 16 * s2->mb_height;
2659 s2->first_field ^= 1;
2660 s2->v_edge_pos = 8 * s2->mb_height;
2661 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2664 if (start_code >= SLICE_MIN_START_CODE &&
2665 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2666 const int field_pic = s2->picture_structure != PICT_FRAME;
2667 int mb_y = start_code - SLICE_MIN_START_CODE;
2668 last_code = SLICE_MIN_START_CODE;
2669 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2670 mb_y += (*buf_ptr&0xE0)<<2;
2673 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2676 if (buf_end - buf_ptr < 2) {
2677 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2678 return AVERROR_INVALIDDATA;
2681 if (mb_y >= s2->mb_height) {
2682 av_log(s2->avctx, AV_LOG_ERROR,
2683 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2684 return AVERROR_INVALIDDATA;
2687 if (!s2->last_picture_ptr) {
2688 /* Skip B-frames if we do not have reference frames and
2689 * GOP is not closed. */
2690 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2691 if (!s2->closed_gop) {
2693 av_log(s2->avctx, AV_LOG_DEBUG,
2694 "Skipping B slice due to open GOP\n");
2699 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2701 if (!s2->next_picture_ptr) {
2702 /* Skip P-frames if we do not have a reference frame or
2703 * we have an invalid header. */
2704 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2706 av_log(s2->avctx, AV_LOG_DEBUG,
2707 "Skipping P slice due to !sync\n");
2711 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2712 s2->pict_type == AV_PICTURE_TYPE_B) ||
2713 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2714 s2->pict_type != AV_PICTURE_TYPE_I) ||
2715 avctx->skip_frame >= AVDISCARD_ALL) {
2720 if (!s->mpeg_enc_ctx_allocated)
2723 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2724 if (mb_y < avctx->skip_top ||
2725 mb_y >= s2->mb_height - avctx->skip_bottom)
2729 if (!s2->pict_type) {
2730 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2731 if (avctx->err_recognition & AV_EF_EXPLODE)
2732 return AVERROR_INVALIDDATA;
2736 if (s->first_slice) {
2739 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2742 if (!s2->current_picture_ptr) {
2743 av_log(avctx, AV_LOG_ERROR,
2744 "current_picture not initialized\n");
2745 return AVERROR_INVALIDDATA;
2749 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2751 int threshold = (s2->mb_height * s->slice_count +
2752 s2->slice_context_count / 2) /
2753 s2->slice_context_count;
2754 av_assert0(avctx->thread_count > 1);
2755 if (threshold <= mb_y) {
2756 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2758 thread_context->start_mb_y = mb_y;
2759 thread_context->end_mb_y = s2->mb_height;
2760 if (s->slice_count) {
2761 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2762 ret = ff_update_duplicate_context(thread_context, s2);
2766 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2769 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2771 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2775 if (avctx->err_recognition & AV_EF_EXPLODE)
2777 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2778 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2779 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2780 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2782 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2783 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2784 ER_AC_END | ER_DC_END | ER_MV_END);
2793 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2794 int *got_output, AVPacket *avpkt)
2796 const uint8_t *buf = avpkt->data;
2798 int buf_size = avpkt->size;
2799 Mpeg1Context *s = avctx->priv_data;
2800 AVFrame *picture = data;
2801 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2803 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2804 /* special case for last picture */
2805 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2806 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2810 s2->next_picture_ptr = NULL;
2817 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2818 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2821 if (ff_combine_frame(&s2->parse_context, next,
2822 (const uint8_t **) &buf, &buf_size) < 0)
2826 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2827 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2828 || s2->codec_tag == AV_RL32("BW10")
2830 vcr2_init_sequence(avctx);
2834 if (avctx->extradata && !s->extradata_decoded) {
2835 ret = decode_chunks(avctx, picture, got_output,
2836 avctx->extradata, avctx->extradata_size);
2838 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2839 av_frame_unref(picture);
2842 s->extradata_decoded = 1;
2843 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2844 s2->current_picture_ptr = NULL;
2849 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2850 if (ret<0 || *got_output) {
2851 s2->current_picture_ptr = NULL;
2853 if (s2->timecode_frame_start != -1 && *got_output) {
2854 char tcbuf[AV_TIMECODE_STR_SIZE];
2855 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2856 AV_FRAME_DATA_GOP_TIMECODE,
2859 return AVERROR(ENOMEM);
2860 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2862 av_timecode_make_mpeg_tc_string(tcbuf, s2->timecode_frame_start);
2863 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2865 s2->timecode_frame_start = -1;
2872 static void flush(AVCodecContext *avctx)
2874 Mpeg1Context *s = avctx->priv_data;
2878 ff_mpeg_flush(avctx);
2881 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2883 Mpeg1Context *s = avctx->priv_data;
2885 ff_mpv_common_end(&s->mpeg_enc_ctx);
2886 av_buffer_unref(&s->a53_buf_ref);
2890 AVCodec ff_mpeg1video_decoder = {
2891 .name = "mpeg1video",
2892 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2893 .type = AVMEDIA_TYPE_VIDEO,
2894 .id = AV_CODEC_ID_MPEG1VIDEO,
2895 .priv_data_size = sizeof(Mpeg1Context),
2896 .init = mpeg_decode_init,
2897 .close = mpeg_decode_end,
2898 .decode = mpeg_decode_frame,
2899 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2900 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2901 AV_CODEC_CAP_SLICE_THREADS,
2902 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
2903 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2906 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2907 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2908 #if CONFIG_MPEG1_NVDEC_HWACCEL
2909 HWACCEL_NVDEC(mpeg1),
2911 #if CONFIG_MPEG1_VDPAU_HWACCEL
2912 HWACCEL_VDPAU(mpeg1),
2914 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2915 HWACCEL_VIDEOTOOLBOX(mpeg1),
2917 #if CONFIG_MPEG1_XVMC_HWACCEL
2918 HWACCEL_XVMC(mpeg1),
2924 AVCodec ff_mpeg2video_decoder = {
2925 .name = "mpeg2video",
2926 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2927 .type = AVMEDIA_TYPE_VIDEO,
2928 .id = AV_CODEC_ID_MPEG2VIDEO,
2929 .priv_data_size = sizeof(Mpeg1Context),
2930 .init = mpeg_decode_init,
2931 .close = mpeg_decode_end,
2932 .decode = mpeg_decode_frame,
2933 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2934 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2935 AV_CODEC_CAP_SLICE_THREADS,
2936 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
2937 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2940 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2941 .hw_configs = (const AVCodecHWConfigInternal*[]) {
2942 #if CONFIG_MPEG2_DXVA2_HWACCEL
2943 HWACCEL_DXVA2(mpeg2),
2945 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2946 HWACCEL_D3D11VA(mpeg2),
2948 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2949 HWACCEL_D3D11VA2(mpeg2),
2951 #if CONFIG_MPEG2_NVDEC_HWACCEL
2952 HWACCEL_NVDEC(mpeg2),
2954 #if CONFIG_MPEG2_VAAPI_HWACCEL
2955 HWACCEL_VAAPI(mpeg2),
2957 #if CONFIG_MPEG2_VDPAU_HWACCEL
2958 HWACCEL_VDPAU(mpeg2),
2960 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2961 HWACCEL_VIDEOTOOLBOX(mpeg2),
2963 #if CONFIG_MPEG2_XVMC_HWACCEL
2964 HWACCEL_XVMC(mpeg2),
2971 AVCodec ff_mpegvideo_decoder = {
2972 .name = "mpegvideo",
2973 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2974 .type = AVMEDIA_TYPE_VIDEO,
2975 .id = AV_CODEC_ID_MPEG2VIDEO,
2976 .priv_data_size = sizeof(Mpeg1Context),
2977 .init = mpeg_decode_init,
2978 .close = mpeg_decode_end,
2979 .decode = mpeg_decode_frame,
2980 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2981 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
2982 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2987 typedef struct IPUContext {
2991 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2994 static int ipu_decode_frame(AVCodecContext *avctx, void *data,
2995 int *got_frame, AVPacket *avpkt)
2997 IPUContext *s = avctx->priv_data;
2998 MpegEncContext *m = &s->m;
2999 GetBitContext *gb = &m->gb;
3000 AVFrame * const frame = data;
3003 ret = ff_get_buffer(avctx, frame, 0);
3007 ret = init_get_bits8(gb, avpkt->data, avpkt->size);
3011 s->flags = get_bits(gb, 8);
3012 m->intra_dc_precision = s->flags & 3;
3013 m->q_scale_type = !!(s->flags & 0x40);
3014 m->intra_vlc_format = !!(s->flags & 0x20);
3015 m->alternate_scan = !!(s->flags & 0x10);
3017 if (s->flags & 0x10) {
3018 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_alternate_vertical_scan);
3019 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_alternate_vertical_scan);
3021 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_zigzag_direct);
3022 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_zigzag_direct);
3025 m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
3028 for (int y = 0; y < avctx->height; y += 16) {
3031 for (int x = 0; x < avctx->width; x += 16) {
3034 return AVERROR_INVALIDDATA;
3036 if (get_bits1(gb)) {
3040 return AVERROR_INVALIDDATA;
3048 m->qscale = mpeg_get_qscale(m);
3050 memset(s->block, 0, sizeof(s->block));
3052 for (int n = 0; n < 6; n++) {
3053 if (s->flags & 0x80) {
3054 ret = ff_mpeg1_decode_block_intra(&m->gb,
3056 m->intra_scantable.permutated,
3057 m->last_dc, s->block[n],
3060 m->block_last_index[n] = ret;
3062 ret = mpeg2_decode_block_intra(m, s->block[n], n);
3069 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
3070 frame->linesize[0], s->block[0]);
3071 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
3072 frame->linesize[0], s->block[1]);
3073 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
3074 frame->linesize[0], s->block[2]);
3075 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
3076 frame->linesize[0], s->block[3]);
3077 m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
3078 frame->linesize[1], s->block[4]);
3079 m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
3080 frame->linesize[2], s->block[5]);
3085 if (get_bits_left(gb) != 32)
3086 return AVERROR_INVALIDDATA;
3088 frame->pict_type = AV_PICTURE_TYPE_I;
3089 frame->key_frame = 1;
3095 static av_cold int ipu_decode_init(AVCodecContext *avctx)
3097 IPUContext *s = avctx->priv_data;
3098 MpegEncContext *m = &s->m;
3100 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3102 ff_mpv_decode_init(m, avctx);
3104 ff_mpv_idct_init(m);
3105 ff_mpeg12_common_init(m);
3106 ff_mpeg12_init_vlcs();
3108 for (int i = 0; i < 64; i++) {
3109 int j = m->idsp.idct_permutation[i];
3110 int v = ff_mpeg1_default_intra_matrix[i];
3111 m->intra_matrix[j] = v;
3112 m->chroma_intra_matrix[j] = v;
3115 for (int i = 0; i < 64; i++) {
3116 int j = m->idsp.idct_permutation[i];
3117 int v = ff_mpeg1_default_non_intra_matrix[i];
3118 m->inter_matrix[j] = v;
3119 m->chroma_inter_matrix[j] = v;
3125 static av_cold int ipu_decode_end(AVCodecContext *avctx)
3127 IPUContext *s = avctx->priv_data;
3129 ff_mpv_common_end(&s->m);
3134 AVCodec ff_ipu_decoder = {
3136 .long_name = NULL_IF_CONFIG_SMALL("IPU Video"),
3137 .type = AVMEDIA_TYPE_VIDEO,
3138 .id = AV_CODEC_ID_IPU,
3139 .priv_data_size = sizeof(IPUContext),
3140 .init = ipu_decode_init,
3141 .decode = ipu_decode_frame,
3142 .close = ipu_decode_end,
3143 .capabilities = AV_CODEC_CAP_DR1,
3144 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,