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 /* we need some permutation to store matrices,
1061 * until the decoder sets the real permutation. */
1062 ff_mpv_idct_init(s2);
1063 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1064 ff_mpeg12_init_vlcs();
1066 s2->chroma_format = 1;
1067 s->mpeg_enc_ctx_allocated = 0;
1068 s->mpeg_enc_ctx.picture_number = 0;
1069 s->repeat_field = 0;
1070 avctx->color_range = AVCOL_RANGE_MPEG;
1075 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1076 const AVCodecContext *avctx_from)
1078 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1079 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1082 if (avctx == avctx_from ||
1083 !ctx_from->mpeg_enc_ctx_allocated ||
1084 !s1->context_initialized)
1087 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1091 if (!ctx->mpeg_enc_ctx_allocated)
1092 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1094 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1095 s->picture_number++;
1101 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1102 const uint8_t *new_perm)
1104 uint16_t temp_matrix[64];
1107 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1109 for (i = 0; i < 64; i++)
1110 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1113 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1114 #if CONFIG_MPEG1_NVDEC_HWACCEL
1117 #if CONFIG_MPEG1_XVMC_HWACCEL
1120 #if CONFIG_MPEG1_VDPAU_HWACCEL
1127 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1128 #if CONFIG_MPEG2_NVDEC_HWACCEL
1131 #if CONFIG_MPEG2_XVMC_HWACCEL
1134 #if CONFIG_MPEG2_VDPAU_HWACCEL
1137 #if CONFIG_MPEG2_DXVA2_HWACCEL
1138 AV_PIX_FMT_DXVA2_VLD,
1140 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1141 AV_PIX_FMT_D3D11VA_VLD,
1144 #if CONFIG_MPEG2_VAAPI_HWACCEL
1147 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1148 AV_PIX_FMT_VIDEOTOOLBOX,
1154 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1159 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1164 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1166 Mpeg1Context *s1 = avctx->priv_data;
1167 MpegEncContext *s = &s1->mpeg_enc_ctx;
1168 const enum AVPixelFormat *pix_fmts;
1170 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1171 return AV_PIX_FMT_GRAY8;
1173 if (s->chroma_format < 2)
1174 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1175 mpeg1_hwaccel_pixfmt_list_420 :
1176 mpeg2_hwaccel_pixfmt_list_420;
1177 else if (s->chroma_format == 2)
1178 pix_fmts = mpeg12_pixfmt_list_422;
1180 pix_fmts = mpeg12_pixfmt_list_444;
1182 return ff_thread_get_format(avctx, pix_fmts);
1185 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1187 // until then pix_fmt may be changed right after codec init
1189 if (avctx->idct_algo == FF_IDCT_AUTO)
1190 avctx->idct_algo = FF_IDCT_NONE;
1192 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1193 Mpeg1Context *s1 = avctx->priv_data;
1194 MpegEncContext *s = &s1->mpeg_enc_ctx;
1196 s->pack_pblocks = 1;
1200 /* Call this function when we know all parameters.
1201 * It may be called in different places for MPEG-1 and MPEG-2. */
1202 static int mpeg_decode_postinit(AVCodecContext *avctx)
1204 Mpeg1Context *s1 = avctx->priv_data;
1205 MpegEncContext *s = &s1->mpeg_enc_ctx;
1206 uint8_t old_permutation[64];
1209 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1211 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1212 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1215 if (s->aspect_ratio_info > 1) {
1217 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1218 (AVRational) { s1->pan_scan.width,
1219 s1->pan_scan.height }),
1220 (AVRational) { s->width, s->height });
1222 /* We ignore the spec here and guess a bit as reality does not
1223 * match the spec, see for example res_change_ffmpeg_aspect.ts
1224 * and sequence-display-aspect.mpg.
1225 * issue1613, 621, 562 */
1226 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1227 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1228 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1229 s->avctx->sample_aspect_ratio =
1230 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1231 (AVRational) { s->width, s->height });
1233 s->avctx->sample_aspect_ratio =
1234 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1235 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1236 // issue1613 4/3 16/9 -> 16/9
1237 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1238 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1239 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1240 ff_dlog(avctx, "aspect A %d/%d\n",
1241 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1242 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1243 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1244 s->avctx->sample_aspect_ratio.den);
1247 s->avctx->sample_aspect_ratio =
1248 ff_mpeg2_aspect[s->aspect_ratio_info];
1252 if (av_image_check_sar(s->width, s->height,
1253 avctx->sample_aspect_ratio) < 0) {
1254 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1255 avctx->sample_aspect_ratio.num,
1256 avctx->sample_aspect_ratio.den);
1257 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1260 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1261 avctx->coded_width != s->width ||
1262 avctx->coded_height != s->height ||
1263 s1->save_width != s->width ||
1264 s1->save_height != s->height ||
1265 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1266 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1268 if (s1->mpeg_enc_ctx_allocated) {
1269 ParseContext pc = s->parse_context;
1270 s->parse_context.buffer = 0;
1271 ff_mpv_common_end(s);
1272 s->parse_context = pc;
1273 s1->mpeg_enc_ctx_allocated = 0;
1276 ret = ff_set_dimensions(avctx, s->width, s->height);
1280 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1281 avctx->rc_max_rate = s->bit_rate;
1282 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1283 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1284 avctx->bit_rate = s->bit_rate;
1286 s1->save_aspect = s->avctx->sample_aspect_ratio;
1287 s1->save_width = s->width;
1288 s1->save_height = s->height;
1289 s1->save_progressive_seq = s->progressive_sequence;
1291 /* low_delay may be forced, in this case we will have B-frames
1292 * that behave like P-frames. */
1293 avctx->has_b_frames = !s->low_delay;
1295 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1297 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1298 avctx->ticks_per_frame = 1;
1300 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1303 av_reduce(&s->avctx->framerate.num,
1304 &s->avctx->framerate.den,
1305 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1306 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1308 avctx->ticks_per_frame = 2;
1310 switch (s->chroma_format) {
1311 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1313 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1314 default: av_assert0(0);
1318 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1319 setup_hwaccel_for_pixfmt(avctx);
1321 /* Quantization matrices may need reordering
1322 * if DCT permutation is changed. */
1323 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1325 ff_mpv_idct_init(s);
1326 if ((ret = ff_mpv_common_init(s)) < 0)
1329 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1330 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1331 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1332 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1334 s1->mpeg_enc_ctx_allocated = 1;
1339 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1342 Mpeg1Context *s1 = avctx->priv_data;
1343 MpegEncContext *s = &s1->mpeg_enc_ctx;
1344 int ref, f_code, vbv_delay;
1346 init_get_bits(&s->gb, buf, buf_size * 8);
1348 ref = get_bits(&s->gb, 10); /* temporal ref */
1349 s->pict_type = get_bits(&s->gb, 3);
1350 if (s->pict_type == 0 || s->pict_type > 3)
1351 return AVERROR_INVALIDDATA;
1353 vbv_delay = get_bits(&s->gb, 16);
1354 s->vbv_delay = vbv_delay;
1355 if (s->pict_type == AV_PICTURE_TYPE_P ||
1356 s->pict_type == AV_PICTURE_TYPE_B) {
1357 s->full_pel[0] = get_bits1(&s->gb);
1358 f_code = get_bits(&s->gb, 3);
1359 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1360 return AVERROR_INVALIDDATA;
1362 s->mpeg_f_code[0][0] = f_code;
1363 s->mpeg_f_code[0][1] = f_code;
1365 if (s->pict_type == AV_PICTURE_TYPE_B) {
1366 s->full_pel[1] = get_bits1(&s->gb);
1367 f_code = get_bits(&s->gb, 3);
1368 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1369 return AVERROR_INVALIDDATA;
1371 s->mpeg_f_code[1][0] = f_code;
1372 s->mpeg_f_code[1][1] = f_code;
1374 s->current_picture.f->pict_type = s->pict_type;
1375 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1377 if (avctx->debug & FF_DEBUG_PICT_INFO)
1378 av_log(avctx, AV_LOG_DEBUG,
1379 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1386 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1388 MpegEncContext *s = &s1->mpeg_enc_ctx;
1389 int horiz_size_ext, vert_size_ext;
1391 AVCPBProperties *cpb_props;
1393 skip_bits(&s->gb, 1); /* profile and level esc*/
1394 s->avctx->profile = get_bits(&s->gb, 3);
1395 s->avctx->level = get_bits(&s->gb, 4);
1396 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1397 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1399 if (!s->chroma_format) {
1400 s->chroma_format = 1;
1401 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1404 horiz_size_ext = get_bits(&s->gb, 2);
1405 vert_size_ext = get_bits(&s->gb, 2);
1406 s->width |= (horiz_size_ext << 12);
1407 s->height |= (vert_size_ext << 12);
1408 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1409 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1410 check_marker(s->avctx, &s->gb, "after bit rate extension");
1411 s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1413 s->low_delay = get_bits1(&s->gb);
1414 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1417 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1418 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1420 ff_dlog(s->avctx, "sequence extension\n");
1421 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1423 if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1424 cpb_props->buffer_size = s1->rc_buffer_size;
1425 if (s->bit_rate != 0x3FFFF*400)
1426 cpb_props->max_bitrate = s->bit_rate;
1429 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1430 av_log(s->avctx, AV_LOG_DEBUG,
1431 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1432 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1433 s1->rc_buffer_size, s->bit_rate);
1436 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1438 MpegEncContext *s = &s1->mpeg_enc_ctx;
1439 int color_description, w, h;
1441 skip_bits(&s->gb, 3); /* video format */
1442 color_description = get_bits1(&s->gb);
1443 if (color_description) {
1444 s->avctx->color_primaries = get_bits(&s->gb, 8);
1445 s->avctx->color_trc = get_bits(&s->gb, 8);
1446 s->avctx->colorspace = get_bits(&s->gb, 8);
1448 w = get_bits(&s->gb, 14);
1449 skip_bits(&s->gb, 1); // marker
1450 h = get_bits(&s->gb, 14);
1451 // remaining 3 bits are zero padding
1453 s1->pan_scan.width = 16 * w;
1454 s1->pan_scan.height = 16 * h;
1456 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1457 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1460 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1462 MpegEncContext *s = &s1->mpeg_enc_ctx;
1466 if (s->progressive_sequence) {
1467 if (s->repeat_first_field) {
1469 if (s->top_field_first)
1473 if (s->picture_structure == PICT_FRAME) {
1475 if (s->repeat_first_field)
1479 for (i = 0; i < nofco; i++) {
1480 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1481 skip_bits(&s->gb, 1); // marker
1482 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1483 skip_bits(&s->gb, 1); // marker
1486 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1487 av_log(s->avctx, AV_LOG_DEBUG,
1488 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1489 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1490 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1491 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1494 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1495 uint16_t matrix1[64], int intra)
1499 for (i = 0; i < 64; i++) {
1500 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1501 int v = get_bits(&s->gb, 8);
1503 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1504 return AVERROR_INVALIDDATA;
1506 if (intra && i == 0 && v != 8) {
1507 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1508 v = 8; // needed by pink.mpg / issue1046
1517 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1519 ff_dlog(s->avctx, "matrix extension\n");
1521 if (get_bits1(&s->gb))
1522 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1523 if (get_bits1(&s->gb))
1524 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1525 if (get_bits1(&s->gb))
1526 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1527 if (get_bits1(&s->gb))
1528 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1531 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1533 MpegEncContext *s = &s1->mpeg_enc_ctx;
1535 s->full_pel[0] = s->full_pel[1] = 0;
1536 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1537 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1538 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1539 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1540 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1541 av_log(s->avctx, AV_LOG_ERROR,
1542 "Missing picture start code, guessing missing values\n");
1543 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1544 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1545 s->pict_type = AV_PICTURE_TYPE_I;
1547 s->pict_type = AV_PICTURE_TYPE_P;
1549 s->pict_type = AV_PICTURE_TYPE_B;
1550 s->current_picture.f->pict_type = s->pict_type;
1551 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1553 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1554 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1555 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1556 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1558 s->intra_dc_precision = get_bits(&s->gb, 2);
1559 s->picture_structure = get_bits(&s->gb, 2);
1560 s->top_field_first = get_bits1(&s->gb);
1561 s->frame_pred_frame_dct = get_bits1(&s->gb);
1562 s->concealment_motion_vectors = get_bits1(&s->gb);
1563 s->q_scale_type = get_bits1(&s->gb);
1564 s->intra_vlc_format = get_bits1(&s->gb);
1565 s->alternate_scan = get_bits1(&s->gb);
1566 s->repeat_first_field = get_bits1(&s->gb);
1567 s->chroma_420_type = get_bits1(&s->gb);
1568 s->progressive_frame = get_bits1(&s->gb);
1570 if (s->alternate_scan) {
1571 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1572 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1574 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1575 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1578 /* composite display not parsed */
1579 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1580 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1581 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1582 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1583 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1584 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1585 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1586 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1587 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1590 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1592 AVCodecContext *avctx = s->avctx;
1593 Mpeg1Context *s1 = (Mpeg1Context *) s;
1596 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1597 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1598 return AVERROR_INVALIDDATA;
1601 /* start frame decoding */
1602 if (s->first_field || s->picture_structure == PICT_FRAME) {
1603 AVFrameSideData *pan_scan;
1605 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1608 ff_mpeg_er_frame_start(s);
1610 /* first check if we must repeat the frame */
1611 s->current_picture_ptr->f->repeat_pict = 0;
1612 if (s->repeat_first_field) {
1613 if (s->progressive_sequence) {
1614 if (s->top_field_first)
1615 s->current_picture_ptr->f->repeat_pict = 4;
1617 s->current_picture_ptr->f->repeat_pict = 2;
1618 } else if (s->progressive_frame) {
1619 s->current_picture_ptr->f->repeat_pict = 1;
1623 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1624 AV_FRAME_DATA_PANSCAN,
1625 sizeof(s1->pan_scan));
1627 return AVERROR(ENOMEM);
1628 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1630 if (s1->a53_buf_ref) {
1631 AVFrameSideData *sd = av_frame_new_side_data_from_buf(
1632 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1635 av_buffer_unref(&s1->a53_buf_ref);
1636 s1->a53_buf_ref = NULL;
1639 if (s1->has_stereo3d) {
1640 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1642 return AVERROR(ENOMEM);
1644 *stereo = s1->stereo3d;
1645 s1->has_stereo3d = 0;
1649 AVFrameSideData *sd =
1650 av_frame_new_side_data(s->current_picture_ptr->f,
1651 AV_FRAME_DATA_AFD, 1);
1653 return AVERROR(ENOMEM);
1655 *sd->data = s1->afd;
1659 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1660 ff_thread_finish_setup(avctx);
1661 } else { // second field
1664 if (!s->current_picture_ptr) {
1665 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1666 return AVERROR_INVALIDDATA;
1669 if (s->avctx->hwaccel) {
1670 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1671 av_log(avctx, AV_LOG_ERROR,
1672 "hardware accelerator failed to decode first field\n");
1677 for (i = 0; i < 4; i++) {
1678 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1679 if (s->picture_structure == PICT_BOTTOM_FIELD)
1680 s->current_picture.f->data[i] +=
1681 s->current_picture_ptr->f->linesize[i];
1685 if (avctx->hwaccel) {
1686 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1693 #define DECODE_SLICE_ERROR -1
1694 #define DECODE_SLICE_OK 0
1698 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1699 * @return DECODE_SLICE_ERROR if the slice is damaged,
1700 * DECODE_SLICE_OK if this slice is OK
1702 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1703 const uint8_t **buf, int buf_size)
1705 AVCodecContext *avctx = s->avctx;
1706 const int lowres = s->avctx->lowres;
1707 const int field_pic = s->picture_structure != PICT_FRAME;
1711 s->resync_mb_y = -1;
1713 av_assert0(mb_y < s->mb_height);
1715 init_get_bits(&s->gb, *buf, buf_size * 8);
1716 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1717 skip_bits(&s->gb, 3);
1719 ff_mpeg1_clean_buffers(s);
1720 s->interlaced_dct = 0;
1722 s->qscale = mpeg_get_qscale(s);
1724 if (s->qscale == 0) {
1725 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1726 return AVERROR_INVALIDDATA;
1729 /* extra slice info */
1730 if (skip_1stop_8data_bits(&s->gb) < 0)
1731 return AVERROR_INVALIDDATA;
1735 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1738 while (get_bits_left(&s->gb) > 0) {
1739 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1740 MBINCR_VLC_BITS, 2);
1742 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1743 return AVERROR_INVALIDDATA;
1748 /* otherwise, stuffing, nothing to do */
1756 if (s->mb_x >= (unsigned) s->mb_width) {
1757 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1758 return AVERROR_INVALIDDATA;
1761 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1762 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1763 int start_code = -1;
1764 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1765 if (buf_end < *buf + buf_size)
1768 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1769 return DECODE_SLICE_ERROR;
1771 return DECODE_SLICE_OK;
1774 s->resync_mb_x = s->mb_x;
1775 s->resync_mb_y = s->mb_y = mb_y;
1777 ff_init_block_index(s);
1779 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1780 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1781 av_log(s->avctx, AV_LOG_DEBUG,
1782 "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",
1784 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1785 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1786 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1787 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1788 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1789 s->progressive_sequence ? "ps" : "",
1790 s->progressive_frame ? "pf" : "",
1791 s->alternate_scan ? "alt" : "",
1792 s->top_field_first ? "top" : "",
1793 s->intra_dc_precision, s->picture_structure,
1794 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1795 s->q_scale_type, s->intra_vlc_format,
1796 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1801 // If 1, we memcpy blocks in xvmcvideo.
1802 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1803 ff_xvmc_init_block(s); // set s->block
1805 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1808 // Note motion_val is normally NULL unless we want to extract the MVs.
1809 if (s->current_picture.motion_val[0] && !s->encoding) {
1810 const int wrap = s->b8_stride;
1811 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1812 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1813 int motion_x, motion_y, dir, i;
1815 for (i = 0; i < 2; i++) {
1816 for (dir = 0; dir < 2; dir++) {
1818 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1819 motion_x = motion_y = 0;
1820 } else if (s->mv_type == MV_TYPE_16X16 ||
1821 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1822 motion_x = s->mv[dir][0][0];
1823 motion_y = s->mv[dir][0][1];
1824 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1825 motion_x = s->mv[dir][i][0];
1826 motion_y = s->mv[dir][i][1];
1829 s->current_picture.motion_val[dir][xy][0] = motion_x;
1830 s->current_picture.motion_val[dir][xy][1] = motion_y;
1831 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1832 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1833 s->current_picture.ref_index [dir][b8_xy] =
1834 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1835 av_assert2(s->field_select[dir][i] == 0 ||
1836 s->field_select[dir][i] == 1);
1843 s->dest[0] += 16 >> lowres;
1844 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1845 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1847 ff_mpv_reconstruct_mb(s, s->block);
1849 if (++s->mb_x >= s->mb_width) {
1850 const int mb_size = 16 >> s->avctx->lowres;
1853 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1854 ff_mpv_report_decode_progress(s);
1857 s->mb_y += 1 << field_pic;
1859 if (s->mb_y >= s->mb_height) {
1860 int left = get_bits_left(&s->gb);
1861 int is_d10 = s->chroma_format == 2 &&
1862 s->pict_type == AV_PICTURE_TYPE_I &&
1863 avctx->profile == 0 && avctx->level == 5 &&
1864 s->intra_dc_precision == 2 &&
1865 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1866 s->progressive_frame == 0
1867 /* vbv_delay == 0xBBB || 0xE10 */;
1869 if (left >= 32 && !is_d10) {
1870 GetBitContext gb = s->gb;
1871 align_get_bits(&gb);
1872 if (show_bits(&gb, 24) == 0x060E2B) {
1873 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1876 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1877 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1883 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1884 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1885 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1886 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1887 return AVERROR_INVALIDDATA;
1891 // There are some files out there which are missing the last slice
1892 // in cases where the slice is completely outside the visible
1893 // area, we detect this here instead of running into the end expecting
1895 left = get_bits_left(&s->gb);
1896 if (s->mb_y >= ((s->height + 15) >> 4) &&
1897 !s->progressive_sequence &&
1900 s->mb_skip_run == -1 &&
1901 (!left || show_bits(&s->gb, left) == 0))
1904 ff_init_block_index(s);
1907 /* skip mb handling */
1908 if (s->mb_skip_run == -1) {
1909 /* read increment again */
1912 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1913 MBINCR_VLC_BITS, 2);
1915 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1916 return AVERROR_INVALIDDATA;
1920 s->mb_skip_run += 33;
1921 } else if (code == 35) {
1922 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1923 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1924 return AVERROR_INVALIDDATA;
1926 goto eos; /* end of slice */
1928 /* otherwise, stuffing, nothing to do */
1930 s->mb_skip_run += code;
1934 if (s->mb_skip_run) {
1936 if (s->pict_type == AV_PICTURE_TYPE_I) {
1937 av_log(s->avctx, AV_LOG_ERROR,
1938 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1939 return AVERROR_INVALIDDATA;
1944 for (i = 0; i < 12; i++)
1945 s->block_last_index[i] = -1;
1946 if (s->picture_structure == PICT_FRAME)
1947 s->mv_type = MV_TYPE_16X16;
1949 s->mv_type = MV_TYPE_FIELD;
1950 if (s->pict_type == AV_PICTURE_TYPE_P) {
1951 /* if P type, zero motion vector is implied */
1952 s->mv_dir = MV_DIR_FORWARD;
1953 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1954 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1955 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1956 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1958 /* if B type, reuse previous vectors and directions */
1959 s->mv[0][0][0] = s->last_mv[0][0][0];
1960 s->mv[0][0][1] = s->last_mv[0][0][1];
1961 s->mv[1][0][0] = s->last_mv[1][0][0];
1962 s->mv[1][0][1] = s->last_mv[1][0][1];
1963 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1964 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1969 eos: // end of slice
1970 if (get_bits_left(&s->gb) < 0) {
1971 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1972 return AVERROR_INVALIDDATA;
1974 *buf += (get_bits_count(&s->gb) - 1) / 8;
1975 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);
1979 static int slice_decode_thread(AVCodecContext *c, void *arg)
1981 MpegEncContext *s = *(void **) arg;
1982 const uint8_t *buf = s->gb.buffer;
1983 int mb_y = s->start_mb_y;
1984 const int field_pic = s->picture_structure != PICT_FRAME;
1986 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1989 uint32_t start_code;
1992 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1994 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1995 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1996 s->start_mb_y, s->end_mb_y, s->er.error_count);
1998 if (c->err_recognition & AV_EF_EXPLODE)
2000 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2001 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2003 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2005 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2006 s->mb_x - 1, s->mb_y,
2007 ER_AC_END | ER_DC_END | ER_MV_END);
2010 if (s->mb_y == s->end_mb_y)
2014 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2015 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2016 return AVERROR_INVALIDDATA;
2017 mb_y = start_code - SLICE_MIN_START_CODE;
2018 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2019 mb_y += (*buf&0xE0)<<2;
2021 if (s->picture_structure == PICT_BOTTOM_FIELD)
2023 if (mb_y >= s->end_mb_y)
2024 return AVERROR_INVALIDDATA;
2029 * Handle slice ends.
2030 * @return 1 if it seems to be the last slice
2032 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2034 Mpeg1Context *s1 = avctx->priv_data;
2035 MpegEncContext *s = &s1->mpeg_enc_ctx;
2037 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2040 if (s->avctx->hwaccel) {
2041 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2043 av_log(avctx, AV_LOG_ERROR,
2044 "hardware accelerator failed to decode picture\n");
2049 /* end of slice reached */
2050 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2053 ff_er_frame_end(&s->er);
2055 ff_mpv_frame_end(s);
2057 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2058 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2061 ff_print_debug_info(s, s->current_picture_ptr, pict);
2062 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2064 if (avctx->active_thread_type & FF_THREAD_FRAME)
2065 s->picture_number++;
2066 /* latency of 1 frame for I- and P-frames */
2067 /* XXX: use another variable than picture_number */
2068 if (s->last_picture_ptr) {
2069 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2072 ff_print_debug_info(s, s->last_picture_ptr, pict);
2073 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2083 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2084 const uint8_t *buf, int buf_size)
2086 Mpeg1Context *s1 = avctx->priv_data;
2087 MpegEncContext *s = &s1->mpeg_enc_ctx;
2091 init_get_bits(&s->gb, buf, buf_size * 8);
2093 width = get_bits(&s->gb, 12);
2094 height = get_bits(&s->gb, 12);
2095 if (width == 0 || height == 0) {
2096 av_log(avctx, AV_LOG_WARNING,
2097 "Invalid horizontal or vertical size value.\n");
2098 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2099 return AVERROR_INVALIDDATA;
2101 s->aspect_ratio_info = get_bits(&s->gb, 4);
2102 if (s->aspect_ratio_info == 0) {
2103 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2104 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2105 return AVERROR_INVALIDDATA;
2107 s->frame_rate_index = get_bits(&s->gb, 4);
2108 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2109 av_log(avctx, AV_LOG_WARNING,
2110 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2111 s->frame_rate_index = 1;
2113 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2114 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2115 return AVERROR_INVALIDDATA;
2118 s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2119 skip_bits(&s->gb, 1);
2122 if (get_bits1(&s->gb)) {
2123 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2125 for (i = 0; i < 64; i++) {
2126 j = s->idsp.idct_permutation[i];
2127 v = ff_mpeg1_default_intra_matrix[i];
2128 s->intra_matrix[j] = v;
2129 s->chroma_intra_matrix[j] = v;
2132 if (get_bits1(&s->gb)) {
2133 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2135 for (i = 0; i < 64; i++) {
2136 int j = s->idsp.idct_permutation[i];
2137 v = ff_mpeg1_default_non_intra_matrix[i];
2138 s->inter_matrix[j] = v;
2139 s->chroma_inter_matrix[j] = v;
2143 if (show_bits(&s->gb, 23) != 0) {
2144 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2145 return AVERROR_INVALIDDATA;
2151 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2152 s->progressive_sequence = 1;
2153 s->progressive_frame = 1;
2154 s->picture_structure = PICT_FRAME;
2156 s->frame_pred_frame_dct = 1;
2157 s->chroma_format = 1;
2159 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2160 s->out_format = FMT_MPEG1;
2161 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2162 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2165 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2166 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2167 s1->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2172 static int vcr2_init_sequence(AVCodecContext *avctx)
2174 Mpeg1Context *s1 = avctx->priv_data;
2175 MpegEncContext *s = &s1->mpeg_enc_ctx;
2178 /* start new MPEG-1 context decoding */
2179 s->out_format = FMT_MPEG1;
2180 if (s1->mpeg_enc_ctx_allocated) {
2181 ff_mpv_common_end(s);
2182 s1->mpeg_enc_ctx_allocated = 0;
2184 s->width = avctx->coded_width;
2185 s->height = avctx->coded_height;
2186 avctx->has_b_frames = 0; // true?
2189 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2190 setup_hwaccel_for_pixfmt(avctx);
2192 ff_mpv_idct_init(s);
2193 if ((ret = ff_mpv_common_init(s)) < 0)
2195 s1->mpeg_enc_ctx_allocated = 1;
2197 for (i = 0; i < 64; i++) {
2198 int j = s->idsp.idct_permutation[i];
2199 v = ff_mpeg1_default_intra_matrix[i];
2200 s->intra_matrix[j] = v;
2201 s->chroma_intra_matrix[j] = v;
2203 v = ff_mpeg1_default_non_intra_matrix[i];
2204 s->inter_matrix[j] = v;
2205 s->chroma_inter_matrix[j] = v;
2208 s->progressive_sequence = 1;
2209 s->progressive_frame = 1;
2210 s->picture_structure = PICT_FRAME;
2212 s->frame_pred_frame_dct = 1;
2213 s->chroma_format = 1;
2214 if (s->codec_tag == AV_RL32("BW10")) {
2215 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2217 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2218 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2220 s1->save_width = s->width;
2221 s1->save_height = s->height;
2222 s1->save_progressive_seq = s->progressive_sequence;
2226 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2227 const uint8_t *p, int buf_size)
2229 Mpeg1Context *s1 = avctx->priv_data;
2231 if (buf_size >= 6 &&
2232 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2233 p[4] == 3 && (p[5] & 0x40)) {
2234 /* extract A53 Part 4 CC data */
2235 int cc_count = p[5] & 0x1f;
2236 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2237 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2238 const uint64_t new_size = (old_size + cc_count
2242 if (new_size > 3*A53_MAX_CC_COUNT)
2243 return AVERROR(EINVAL);
2245 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2247 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
2249 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2252 } else if (buf_size >= 2 &&
2253 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2254 /* extract SCTE-20 CC data */
2259 init_get_bits(&gb, p + 2, buf_size - 2);
2260 cc_count = get_bits(&gb, 5);
2262 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2263 const uint64_t new_size = (old_size + cc_count
2265 if (new_size > 3*A53_MAX_CC_COUNT)
2266 return AVERROR(EINVAL);
2268 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2270 uint8_t field, cc1, cc2;
2271 uint8_t *cap = s1->a53_buf_ref->data;
2273 memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3);
2274 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2275 skip_bits(&gb, 2); // priority
2276 field = get_bits(&gb, 2);
2277 skip_bits(&gb, 5); // line_offset
2278 cc1 = get_bits(&gb, 8);
2279 cc2 = get_bits(&gb, 8);
2280 skip_bits(&gb, 1); // marker
2282 if (!field) { // forbidden
2283 cap[0] = cap[1] = cap[2] = 0x00;
2285 field = (field == 2 ? 1 : 0);
2286 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2287 cap[0] = 0x04 | field;
2288 cap[1] = ff_reverse[cc1];
2289 cap[2] = ff_reverse[cc2];
2294 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2297 } else if (buf_size >= 11 &&
2298 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2299 /* extract DVD CC data
2301 * uint32_t user_data_start_code 0x000001B2 (big endian)
2302 * uint16_t user_identifier 0x4343 "CC"
2303 * uint8_t user_data_type_code 0x01
2304 * uint8_t caption_block_size 0xF8
2306 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2307 * bit 6 caption_filler 0
2308 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2309 * bit 0 caption_extra_field_added 1=one additional caption word
2311 * struct caption_field_block {
2313 * bit 7:1 caption_filler 0x7F (all 1s)
2314 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2315 * uint8_t caption_first_byte
2316 * uint8_t caption_second_byte
2317 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2319 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2320 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2321 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2322 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2323 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2326 // There is a caption count field in the data, but it is often
2327 // incorrect. So count the number of captions present.
2328 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2330 // Transform the DVD format into A53 Part 4 format
2332 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2333 const uint64_t new_size = (old_size + cc_count
2335 if (new_size > 3*A53_MAX_CC_COUNT)
2336 return AVERROR(EINVAL);
2338 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2340 uint8_t field1 = !!(p[4] & 0x80);
2341 uint8_t *cap = s1->a53_buf_ref->data;
2343 for (i = 0; i < cc_count; i++) {
2344 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2347 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2354 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2361 static void mpeg_decode_user_data(AVCodecContext *avctx,
2362 const uint8_t *p, int buf_size)
2364 Mpeg1Context *s = avctx->priv_data;
2365 const uint8_t *buf_end = p + buf_size;
2366 Mpeg1Context *s1 = avctx->priv_data;
2370 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2371 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2373 av_log(avctx, AV_LOG_ERROR, "\n");
2379 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2383 /* we parse the DTG active format information */
2384 if (buf_end - p >= 5 &&
2385 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2393 if (buf_end - p < 1)
2396 s1->afd = p[0] & 0x0f;
2398 } else if (buf_end - p >= 6 &&
2399 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2400 p[4] == 0x03) { // S3D_video_format_length
2401 // the 0x7F mask ignores the reserved_bit value
2402 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2404 if (S3D_video_format_type == 0x03 ||
2405 S3D_video_format_type == 0x04 ||
2406 S3D_video_format_type == 0x08 ||
2407 S3D_video_format_type == 0x23) {
2409 s1->has_stereo3d = 1;
2411 switch (S3D_video_format_type) {
2413 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2416 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2419 s1->stereo3d.type = AV_STEREO3D_2D;
2422 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2426 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2431 static void mpeg_decode_gop(AVCodecContext *avctx,
2432 const uint8_t *buf, int buf_size)
2434 Mpeg1Context *s1 = avctx->priv_data;
2435 MpegEncContext *s = &s1->mpeg_enc_ctx;
2439 init_get_bits(&s->gb, buf, buf_size * 8);
2441 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2443 #if FF_API_PRIVATE_OPT
2444 FF_DISABLE_DEPRECATION_WARNINGS
2445 avctx->timecode_frame_start = tc;
2446 FF_ENABLE_DEPRECATION_WARNINGS
2449 s->closed_gop = get_bits1(&s->gb);
2450 /* broken_link indicates that after editing the
2451 * reference frames of the first B-Frames after GOP I-Frame
2452 * are missing (open gop) */
2453 broken_link = get_bits1(&s->gb);
2455 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2456 char tcbuf[AV_TIMECODE_STR_SIZE];
2457 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2458 av_log(s->avctx, AV_LOG_DEBUG,
2459 "GOP (%s) closed_gop=%d broken_link=%d\n",
2460 tcbuf, s->closed_gop, broken_link);
2464 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2465 int *got_output, const uint8_t *buf, int buf_size)
2467 Mpeg1Context *s = avctx->priv_data;
2468 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2469 const uint8_t *buf_ptr = buf;
2470 const uint8_t *buf_end = buf + buf_size;
2471 int ret, input_size;
2472 int last_code = 0, skip_frame = 0;
2473 int picture_start_code_seen = 0;
2476 /* find next start code */
2477 uint32_t start_code = -1;
2478 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2479 if (start_code > 0x1ff) {
2482 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2485 av_assert0(avctx->thread_count > 1);
2487 avctx->execute(avctx, slice_decode_thread,
2488 &s2->thread_context[0], NULL,
2489 s->slice_count, sizeof(void *));
2490 for (i = 0; i < s->slice_count; i++)
2491 s2->er.error_count += s2->thread_context[i]->er.error_count;
2494 ret = slice_end(avctx, picture);
2498 // FIXME: merge with the stuff in mpeg_decode_slice
2499 if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2505 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2506 return AVERROR_INVALIDDATA;
2508 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2511 input_size = buf_end - buf_ptr;
2513 if (avctx->debug & FF_DEBUG_STARTCODE)
2514 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2515 start_code, buf_ptr - buf, input_size);
2517 /* prepare data for next start code */
2518 switch (start_code) {
2519 case SEQ_START_CODE:
2520 if (last_code == 0) {
2521 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2522 if (buf != avctx->extradata)
2525 av_log(avctx, AV_LOG_ERROR,
2526 "ignoring SEQ_START_CODE after %X\n", last_code);
2527 if (avctx->err_recognition & AV_EF_EXPLODE)
2528 return AVERROR_INVALIDDATA;
2532 case PICTURE_START_CODE:
2533 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2534 /* If it's a frame picture, there can't be more than one picture header.
2535 Yet, it does happen and we need to handle it. */
2536 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2539 picture_start_code_seen = 1;
2541 if (s2->width <= 0 || s2->height <= 0) {
2542 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2543 s2->width, s2->height);
2544 return AVERROR_INVALIDDATA;
2548 s2->intra_dc_precision= 3;
2549 s2->intra_matrix[0]= 1;
2551 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2552 !avctx->hwaccel && s->slice_count) {
2555 avctx->execute(avctx, slice_decode_thread,
2556 s2->thread_context, NULL,
2557 s->slice_count, sizeof(void *));
2558 for (i = 0; i < s->slice_count; i++)
2559 s2->er.error_count += s2->thread_context[i]->er.error_count;
2562 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2563 ret = mpeg_decode_postinit(avctx);
2565 av_log(avctx, AV_LOG_ERROR,
2566 "mpeg_decode_postinit() failure\n");
2570 /* We have a complete image: we try to decompress it. */
2571 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2574 last_code = PICTURE_START_CODE;
2576 av_log(avctx, AV_LOG_ERROR,
2577 "ignoring pic after %X\n", last_code);
2578 if (avctx->err_recognition & AV_EF_EXPLODE)
2579 return AVERROR_INVALIDDATA;
2582 case EXT_START_CODE:
2583 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2585 switch (get_bits(&s2->gb, 4)) {
2587 if (last_code == 0) {
2588 mpeg_decode_sequence_extension(s);
2590 av_log(avctx, AV_LOG_ERROR,
2591 "ignoring seq ext after %X\n", last_code);
2592 if (avctx->err_recognition & AV_EF_EXPLODE)
2593 return AVERROR_INVALIDDATA;
2597 mpeg_decode_sequence_display_extension(s);
2600 mpeg_decode_quant_matrix_extension(s2);
2603 mpeg_decode_picture_display_extension(s);
2606 if (last_code == PICTURE_START_CODE) {
2607 mpeg_decode_picture_coding_extension(s);
2609 av_log(avctx, AV_LOG_ERROR,
2610 "ignoring pic cod ext after %X\n", last_code);
2611 if (avctx->err_recognition & AV_EF_EXPLODE)
2612 return AVERROR_INVALIDDATA;
2617 case USER_START_CODE:
2618 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2620 case GOP_START_CODE:
2621 if (last_code == 0) {
2622 s2->first_field = 0;
2623 mpeg_decode_gop(avctx, buf_ptr, input_size);
2626 av_log(avctx, AV_LOG_ERROR,
2627 "ignoring GOP_START_CODE after %X\n", last_code);
2628 if (avctx->err_recognition & AV_EF_EXPLODE)
2629 return AVERROR_INVALIDDATA;
2633 if (start_code >= SLICE_MIN_START_CODE &&
2634 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2635 if (s2->progressive_sequence && !s2->progressive_frame) {
2636 s2->progressive_frame = 1;
2637 av_log(s2->avctx, AV_LOG_ERROR,
2638 "interlaced frame in progressive sequence, ignoring\n");
2641 if (s2->picture_structure == 0 ||
2642 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2643 av_log(s2->avctx, AV_LOG_ERROR,
2644 "picture_structure %d invalid, ignoring\n",
2645 s2->picture_structure);
2646 s2->picture_structure = PICT_FRAME;
2649 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2650 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2652 if (s2->picture_structure == PICT_FRAME) {
2653 s2->first_field = 0;
2654 s2->v_edge_pos = 16 * s2->mb_height;
2656 s2->first_field ^= 1;
2657 s2->v_edge_pos = 8 * s2->mb_height;
2658 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2661 if (start_code >= SLICE_MIN_START_CODE &&
2662 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2663 const int field_pic = s2->picture_structure != PICT_FRAME;
2664 int mb_y = start_code - SLICE_MIN_START_CODE;
2665 last_code = SLICE_MIN_START_CODE;
2666 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2667 mb_y += (*buf_ptr&0xE0)<<2;
2670 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2673 if (buf_end - buf_ptr < 2) {
2674 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2675 return AVERROR_INVALIDDATA;
2678 if (mb_y >= s2->mb_height) {
2679 av_log(s2->avctx, AV_LOG_ERROR,
2680 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2681 return AVERROR_INVALIDDATA;
2684 if (!s2->last_picture_ptr) {
2685 /* Skip B-frames if we do not have reference frames and
2686 * GOP is not closed. */
2687 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2688 if (!s2->closed_gop) {
2690 av_log(s2->avctx, AV_LOG_DEBUG,
2691 "Skipping B slice due to open GOP\n");
2696 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2698 if (!s2->next_picture_ptr) {
2699 /* Skip P-frames if we do not have a reference frame or
2700 * we have an invalid header. */
2701 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2703 av_log(s2->avctx, AV_LOG_DEBUG,
2704 "Skipping P slice due to !sync\n");
2708 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2709 s2->pict_type == AV_PICTURE_TYPE_B) ||
2710 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2711 s2->pict_type != AV_PICTURE_TYPE_I) ||
2712 avctx->skip_frame >= AVDISCARD_ALL) {
2717 if (!s->mpeg_enc_ctx_allocated)
2720 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2721 if (mb_y < avctx->skip_top ||
2722 mb_y >= s2->mb_height - avctx->skip_bottom)
2726 if (!s2->pict_type) {
2727 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2728 if (avctx->err_recognition & AV_EF_EXPLODE)
2729 return AVERROR_INVALIDDATA;
2733 if (s->first_slice) {
2736 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2739 if (!s2->current_picture_ptr) {
2740 av_log(avctx, AV_LOG_ERROR,
2741 "current_picture not initialized\n");
2742 return AVERROR_INVALIDDATA;
2746 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2748 int threshold = (s2->mb_height * s->slice_count +
2749 s2->slice_context_count / 2) /
2750 s2->slice_context_count;
2751 av_assert0(avctx->thread_count > 1);
2752 if (threshold <= mb_y) {
2753 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2755 thread_context->start_mb_y = mb_y;
2756 thread_context->end_mb_y = s2->mb_height;
2757 if (s->slice_count) {
2758 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2759 ret = ff_update_duplicate_context(thread_context, s2);
2763 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2766 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2768 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2772 if (avctx->err_recognition & AV_EF_EXPLODE)
2774 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2775 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2776 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2777 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2779 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2780 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2781 ER_AC_END | ER_DC_END | ER_MV_END);
2790 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2791 int *got_output, AVPacket *avpkt)
2793 const uint8_t *buf = avpkt->data;
2795 int buf_size = avpkt->size;
2796 Mpeg1Context *s = avctx->priv_data;
2797 AVFrame *picture = data;
2798 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2800 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2801 /* special case for last picture */
2802 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2803 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2807 s2->next_picture_ptr = NULL;
2814 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2815 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2818 if (ff_combine_frame(&s2->parse_context, next,
2819 (const uint8_t **) &buf, &buf_size) < 0)
2823 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2824 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2825 || s2->codec_tag == AV_RL32("BW10")
2827 vcr2_init_sequence(avctx);
2831 if (avctx->extradata && !s->extradata_decoded) {
2832 ret = decode_chunks(avctx, picture, got_output,
2833 avctx->extradata, avctx->extradata_size);
2835 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2836 av_frame_unref(picture);
2839 s->extradata_decoded = 1;
2840 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2841 s2->current_picture_ptr = NULL;
2846 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2847 if (ret<0 || *got_output) {
2848 s2->current_picture_ptr = NULL;
2850 if (s2->timecode_frame_start != -1 && *got_output) {
2851 char tcbuf[AV_TIMECODE_STR_SIZE];
2852 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2853 AV_FRAME_DATA_GOP_TIMECODE,
2856 return AVERROR(ENOMEM);
2857 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2859 av_timecode_make_mpeg_tc_string(tcbuf, s2->timecode_frame_start);
2860 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2862 s2->timecode_frame_start = -1;
2869 static void flush(AVCodecContext *avctx)
2871 Mpeg1Context *s = avctx->priv_data;
2875 ff_mpeg_flush(avctx);
2878 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2880 Mpeg1Context *s = avctx->priv_data;
2882 if (s->mpeg_enc_ctx_allocated)
2883 ff_mpv_common_end(&s->mpeg_enc_ctx);
2884 av_buffer_unref(&s->a53_buf_ref);
2888 AVCodec ff_mpeg1video_decoder = {
2889 .name = "mpeg1video",
2890 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2891 .type = AVMEDIA_TYPE_VIDEO,
2892 .id = AV_CODEC_ID_MPEG1VIDEO,
2893 .priv_data_size = sizeof(Mpeg1Context),
2894 .init = mpeg_decode_init,
2895 .close = mpeg_decode_end,
2896 .decode = mpeg_decode_frame,
2897 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2898 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2899 AV_CODEC_CAP_SLICE_THREADS,
2900 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2901 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2904 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2905 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2906 #if CONFIG_MPEG1_NVDEC_HWACCEL
2907 HWACCEL_NVDEC(mpeg1),
2909 #if CONFIG_MPEG1_VDPAU_HWACCEL
2910 HWACCEL_VDPAU(mpeg1),
2912 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2913 HWACCEL_VIDEOTOOLBOX(mpeg1),
2915 #if CONFIG_MPEG1_XVMC_HWACCEL
2916 HWACCEL_XVMC(mpeg1),
2922 AVCodec ff_mpeg2video_decoder = {
2923 .name = "mpeg2video",
2924 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2925 .type = AVMEDIA_TYPE_VIDEO,
2926 .id = AV_CODEC_ID_MPEG2VIDEO,
2927 .priv_data_size = sizeof(Mpeg1Context),
2928 .init = mpeg_decode_init,
2929 .close = mpeg_decode_end,
2930 .decode = mpeg_decode_frame,
2931 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2932 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2933 AV_CODEC_CAP_SLICE_THREADS,
2934 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2935 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2938 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2939 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2940 #if CONFIG_MPEG2_DXVA2_HWACCEL
2941 HWACCEL_DXVA2(mpeg2),
2943 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2944 HWACCEL_D3D11VA(mpeg2),
2946 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2947 HWACCEL_D3D11VA2(mpeg2),
2949 #if CONFIG_MPEG2_NVDEC_HWACCEL
2950 HWACCEL_NVDEC(mpeg2),
2952 #if CONFIG_MPEG2_VAAPI_HWACCEL
2953 HWACCEL_VAAPI(mpeg2),
2955 #if CONFIG_MPEG2_VDPAU_HWACCEL
2956 HWACCEL_VDPAU(mpeg2),
2958 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2959 HWACCEL_VIDEOTOOLBOX(mpeg2),
2961 #if CONFIG_MPEG2_XVMC_HWACCEL
2962 HWACCEL_XVMC(mpeg2),
2969 AVCodec ff_mpegvideo_decoder = {
2970 .name = "mpegvideo",
2971 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2972 .type = AVMEDIA_TYPE_VIDEO,
2973 .id = AV_CODEC_ID_MPEG2VIDEO,
2974 .priv_data_size = sizeof(Mpeg1Context),
2975 .init = mpeg_decode_init,
2976 .close = mpeg_decode_end,
2977 .decode = mpeg_decode_frame,
2978 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2979 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2980 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2985 typedef struct IPUContext {
2989 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2992 static int ipu_decode_frame(AVCodecContext *avctx, void *data,
2993 int *got_frame, AVPacket *avpkt)
2995 IPUContext *s = avctx->priv_data;
2996 MpegEncContext *m = &s->m;
2997 GetBitContext *gb = &m->gb;
2998 AVFrame * const frame = data;
3001 ret = ff_get_buffer(avctx, frame, 0);
3005 ret = init_get_bits8(gb, avpkt->data, avpkt->size);
3009 s->flags = get_bits(gb, 8);
3010 m->intra_dc_precision = s->flags & 3;
3011 m->q_scale_type = !!(s->flags & 0x40);
3012 m->intra_vlc_format = !!(s->flags & 0x20);
3013 m->alternate_scan = !!(s->flags & 0x10);
3015 if (s->flags & 0x10) {
3016 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_alternate_vertical_scan);
3017 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_alternate_vertical_scan);
3019 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_zigzag_direct);
3020 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_zigzag_direct);
3023 m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
3026 for (int y = 0; y < avctx->height; y += 16) {
3029 for (int x = 0; x < avctx->width; x += 16) {
3032 return AVERROR_INVALIDDATA;
3034 if (get_bits1(gb)) {
3038 return AVERROR_INVALIDDATA;
3046 m->qscale = mpeg_get_qscale(m);
3048 memset(s->block, 0, sizeof(s->block));
3050 for (int n = 0; n < 6; n++) {
3051 if (s->flags & 0x80) {
3052 ret = ff_mpeg1_decode_block_intra(&m->gb,
3054 m->intra_scantable.permutated,
3055 m->last_dc, s->block[n],
3058 m->block_last_index[n] = ret;
3060 ret = mpeg2_decode_block_intra(m, s->block[n], n);
3067 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
3068 frame->linesize[0], s->block[0]);
3069 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
3070 frame->linesize[0], s->block[1]);
3071 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
3072 frame->linesize[0], s->block[2]);
3073 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
3074 frame->linesize[0], s->block[3]);
3075 m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
3076 frame->linesize[1], s->block[4]);
3077 m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
3078 frame->linesize[2], s->block[5]);
3083 if (get_bits_left(gb) != 32)
3084 return AVERROR_INVALIDDATA;
3086 frame->pict_type = AV_PICTURE_TYPE_I;
3087 frame->key_frame = 1;
3093 static av_cold int ipu_decode_init(AVCodecContext *avctx)
3095 IPUContext *s = avctx->priv_data;
3096 MpegEncContext *m = &s->m;
3098 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3100 ff_mpv_decode_init(m, avctx);
3101 ff_mpv_idct_init(m);
3102 ff_mpeg12_common_init(m);
3103 ff_mpeg12_init_vlcs();
3105 for (int i = 0; i < 64; i++) {
3106 int j = m->idsp.idct_permutation[i];
3107 int v = ff_mpeg1_default_intra_matrix[i];
3108 m->intra_matrix[j] = v;
3109 m->chroma_intra_matrix[j] = v;
3112 for (int i = 0; i < 64; i++) {
3113 int j = m->idsp.idct_permutation[i];
3114 int v = ff_mpeg1_default_non_intra_matrix[i];
3115 m->inter_matrix[j] = v;
3116 m->chroma_inter_matrix[j] = v;
3122 static av_cold int ipu_decode_end(AVCodecContext *avctx)
3124 IPUContext *s = avctx->priv_data;
3126 ff_mpv_common_end(&s->m);
3131 AVCodec ff_ipu_decoder = {
3133 .long_name = NULL_IF_CONFIG_SMALL("IPU Video"),
3134 .type = AVMEDIA_TYPE_VIDEO,
3135 .id = AV_CODEC_ID_IPU,
3136 .priv_data_size = sizeof(IPUContext),
3137 .init = ipu_decode_init,
3138 .decode = ipu_decode_frame,
3139 .close = ipu_decode_end,
3140 .capabilities = AV_CODEC_CAP_DR1,
3141 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,