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"
52 #include "xvmc_internal.h"
54 #define A53_MAX_CC_COUNT 2000
56 typedef struct Mpeg1Context {
57 MpegEncContext mpeg_enc_ctx;
58 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
59 int repeat_field; /* true if we must repeat the field */
60 AVPanScan pan_scan; /* some temporary storage for the panscan */
63 AVBufferRef *a53_buf_ref;
67 AVRational save_aspect;
68 int save_width, save_height, save_progressive_seq;
70 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
71 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
74 int extradata_decoded;
77 #define MB_TYPE_ZERO_MV 0x20000000
79 static const uint32_t ptype2mb_type[7] = {
81 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
83 MB_TYPE_L0 | MB_TYPE_CBP,
84 MB_TYPE_QUANT | MB_TYPE_INTRA,
85 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
86 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
89 static const uint32_t btype2mb_type[11] = {
92 MB_TYPE_L1 | MB_TYPE_CBP,
94 MB_TYPE_L0 | MB_TYPE_CBP,
96 MB_TYPE_L0L1 | MB_TYPE_CBP,
97 MB_TYPE_QUANT | MB_TYPE_INTRA,
98 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
99 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
100 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
103 /* as H.263, but only 17 codes */
104 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
106 int code, sign, val, shift;
108 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
114 sign = get_bits1(&s->gb);
118 val = (val - 1) << shift;
119 val |= get_bits(&s->gb, shift);
126 /* modulo decoding */
127 return sign_extend(val, 5 + shift);
130 #define MAX_INDEX (64 - 1)
131 #define check_scantable_index(ctx, x) \
133 if ((x) > MAX_INDEX) { \
134 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
135 ctx->mb_x, ctx->mb_y); \
136 return AVERROR_INVALIDDATA; \
140 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
141 int16_t *block, int n)
143 int level, i, j, run;
144 RLTable *rl = &ff_rl_mpeg1;
145 uint8_t *const scantable = s->intra_scantable.permutated;
146 const uint16_t *quant_matrix = s->inter_matrix;
147 const int qscale = s->qscale;
150 OPEN_READER(re, &s->gb);
152 // special case for first coefficient, no need to add second VLC table
153 UPDATE_CACHE(re, &s->gb);
154 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
155 level = (3 * qscale * quant_matrix[0]) >> 5;
156 level = (level - 1) | 1;
157 if (GET_CACHE(re, &s->gb) & 0x40000000)
161 SKIP_BITS(re, &s->gb, 2);
162 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
165 /* now quantify & encode AC coefficients */
167 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
175 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
176 level = (level - 1) | 1;
177 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
178 SHOW_SBITS(re, &s->gb, 1);
179 SKIP_BITS(re, &s->gb, 1);
182 run = SHOW_UBITS(re, &s->gb, 6) + 1;
183 LAST_SKIP_BITS(re, &s->gb, 6);
184 UPDATE_CACHE(re, &s->gb);
185 level = SHOW_SBITS(re, &s->gb, 8);
186 SKIP_BITS(re, &s->gb, 8);
188 level = SHOW_UBITS(re, &s->gb, 8) - 256;
189 SKIP_BITS(re, &s->gb, 8);
190 } else if (level == 0) {
191 level = SHOW_UBITS(re, &s->gb, 8);
192 SKIP_BITS(re, &s->gb, 8);
200 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
201 level = (level - 1) | 1;
204 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
205 level = (level - 1) | 1;
210 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
212 UPDATE_CACHE(re, &s->gb);
215 LAST_SKIP_BITS(re, &s->gb, 2);
216 CLOSE_READER(re, &s->gb);
219 check_scantable_index(s, i);
221 s->block_last_index[n] = i;
226 * Changing this would eat up any speed benefits it has.
227 * Do not use "fast" flag if you need the code to be robust.
229 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
230 int16_t *block, int n)
232 int level, i, j, run;
233 RLTable *rl = &ff_rl_mpeg1;
234 uint8_t *const scantable = s->intra_scantable.permutated;
235 const int qscale = s->qscale;
238 OPEN_READER(re, &s->gb);
240 // Special case for first coefficient, no need to add second VLC table.
241 UPDATE_CACHE(re, &s->gb);
242 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
243 level = (3 * qscale) >> 1;
244 level = (level - 1) | 1;
245 if (GET_CACHE(re, &s->gb) & 0x40000000)
249 SKIP_BITS(re, &s->gb, 2);
250 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
254 /* now quantify & encode AC coefficients */
256 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
264 level = ((level * 2 + 1) * qscale) >> 1;
265 level = (level - 1) | 1;
266 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
267 SHOW_SBITS(re, &s->gb, 1);
268 SKIP_BITS(re, &s->gb, 1);
271 run = SHOW_UBITS(re, &s->gb, 6) + 1;
272 LAST_SKIP_BITS(re, &s->gb, 6);
273 UPDATE_CACHE(re, &s->gb);
274 level = SHOW_SBITS(re, &s->gb, 8);
275 SKIP_BITS(re, &s->gb, 8);
277 level = SHOW_UBITS(re, &s->gb, 8) - 256;
278 SKIP_BITS(re, &s->gb, 8);
279 } else if (level == 0) {
280 level = SHOW_UBITS(re, &s->gb, 8);
281 SKIP_BITS(re, &s->gb, 8);
289 level = ((level * 2 + 1) * qscale) >> 1;
290 level = (level - 1) | 1;
293 level = ((level * 2 + 1) * qscale) >> 1;
294 level = (level - 1) | 1;
299 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
301 UPDATE_CACHE(re, &s->gb);
304 LAST_SKIP_BITS(re, &s->gb, 2);
305 CLOSE_READER(re, &s->gb);
308 check_scantable_index(s, i);
310 s->block_last_index[n] = i;
314 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
315 int16_t *block, int n)
317 int level, i, j, run;
318 RLTable *rl = &ff_rl_mpeg1;
319 uint8_t *const scantable = s->intra_scantable.permutated;
320 const uint16_t *quant_matrix;
321 const int qscale = s->qscale;
327 OPEN_READER(re, &s->gb);
330 quant_matrix = s->inter_matrix;
332 quant_matrix = s->chroma_inter_matrix;
334 // Special case for first coefficient, no need to add second VLC table.
335 UPDATE_CACHE(re, &s->gb);
336 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
337 level = (3 * qscale * quant_matrix[0]) >> 5;
338 if (GET_CACHE(re, &s->gb) & 0x40000000)
343 SKIP_BITS(re, &s->gb, 2);
344 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
348 /* now quantify & encode AC coefficients */
350 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
358 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
359 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
360 SHOW_SBITS(re, &s->gb, 1);
361 SKIP_BITS(re, &s->gb, 1);
364 run = SHOW_UBITS(re, &s->gb, 6) + 1;
365 LAST_SKIP_BITS(re, &s->gb, 6);
366 UPDATE_CACHE(re, &s->gb);
367 level = SHOW_SBITS(re, &s->gb, 12);
368 SKIP_BITS(re, &s->gb, 12);
375 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
378 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
384 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
386 UPDATE_CACHE(re, &s->gb);
389 LAST_SKIP_BITS(re, &s->gb, 2);
390 CLOSE_READER(re, &s->gb);
392 block[63] ^= (mismatch & 1);
394 check_scantable_index(s, i);
396 s->block_last_index[n] = i;
401 * Changing this would eat up any speed benefits it has.
402 * Do not use "fast" flag if you need the code to be robust.
404 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
405 int16_t *block, int n)
407 int level, i, j, run;
408 RLTable *rl = &ff_rl_mpeg1;
409 uint8_t *const scantable = s->intra_scantable.permutated;
410 const int qscale = s->qscale;
411 OPEN_READER(re, &s->gb);
414 // special case for first coefficient, no need to add second VLC table
415 UPDATE_CACHE(re, &s->gb);
416 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
417 level = (3 * qscale) >> 1;
418 if (GET_CACHE(re, &s->gb) & 0x40000000)
422 SKIP_BITS(re, &s->gb, 2);
423 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
427 /* now quantify & encode AC coefficients */
429 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
436 level = ((level * 2 + 1) * qscale) >> 1;
437 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
438 SHOW_SBITS(re, &s->gb, 1);
439 SKIP_BITS(re, &s->gb, 1);
442 run = SHOW_UBITS(re, &s->gb, 6) + 1;
443 LAST_SKIP_BITS(re, &s->gb, 6);
444 UPDATE_CACHE(re, &s->gb);
445 level = SHOW_SBITS(re, &s->gb, 12);
446 SKIP_BITS(re, &s->gb, 12);
453 level = ((-level * 2 + 1) * qscale) >> 1;
456 level = ((level * 2 + 1) * qscale) >> 1;
461 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
464 UPDATE_CACHE(re, &s->gb);
467 LAST_SKIP_BITS(re, &s->gb, 2);
468 CLOSE_READER(re, &s->gb);
470 check_scantable_index(s, i);
472 s->block_last_index[n] = i;
476 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
477 int16_t *block, int n)
479 int level, dc, diff, i, j, run;
482 uint8_t *const scantable = s->intra_scantable.permutated;
483 const uint16_t *quant_matrix;
484 const int qscale = s->qscale;
489 quant_matrix = s->intra_matrix;
492 quant_matrix = s->chroma_intra_matrix;
493 component = (n & 1) + 1;
495 diff = decode_dc(&s->gb, component);
496 dc = s->last_dc[component];
498 s->last_dc[component] = dc;
499 block[0] = dc * (1 << (3 - s->intra_dc_precision));
500 ff_tlog(s->avctx, "dc=%d\n", block[0]);
501 mismatch = block[0] ^ 1;
503 if (s->intra_vlc_format)
509 OPEN_READER(re, &s->gb);
510 /* now quantify & encode AC coefficients */
512 UPDATE_CACHE(re, &s->gb);
513 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
518 } else if (level != 0) {
523 level = (level * qscale * quant_matrix[j]) >> 4;
524 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
525 SHOW_SBITS(re, &s->gb, 1);
526 LAST_SKIP_BITS(re, &s->gb, 1);
529 run = SHOW_UBITS(re, &s->gb, 6) + 1;
530 SKIP_BITS(re, &s->gb, 6);
531 level = SHOW_SBITS(re, &s->gb, 12);
532 LAST_SKIP_BITS(re, &s->gb, 12);
538 level = (-level * qscale * quant_matrix[j]) >> 4;
541 level = (level * qscale * quant_matrix[j]) >> 4;
548 CLOSE_READER(re, &s->gb);
550 block[63] ^= mismatch & 1;
552 check_scantable_index(s, i);
554 s->block_last_index[n] = i;
559 * Changing this would eat up any speed benefits it has.
560 * Do not use "fast" flag if you need the code to be robust.
562 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
563 int16_t *block, int n)
565 int level, dc, diff, i, j, run;
568 uint8_t *const scantable = s->intra_scantable.permutated;
569 const uint16_t *quant_matrix;
570 const int qscale = s->qscale;
574 quant_matrix = s->intra_matrix;
577 quant_matrix = s->chroma_intra_matrix;
578 component = (n & 1) + 1;
580 diff = decode_dc(&s->gb, component);
581 dc = s->last_dc[component];
583 s->last_dc[component] = dc;
584 block[0] = dc * (1 << (3 - s->intra_dc_precision));
586 if (s->intra_vlc_format)
592 OPEN_READER(re, &s->gb);
593 /* now quantify & encode AC coefficients */
595 UPDATE_CACHE(re, &s->gb);
596 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
599 if (level >= 64 || i > 63) {
601 } else if (level != 0) {
604 level = (level * qscale * quant_matrix[j]) >> 4;
605 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
606 SHOW_SBITS(re, &s->gb, 1);
607 LAST_SKIP_BITS(re, &s->gb, 1);
610 run = SHOW_UBITS(re, &s->gb, 6) + 1;
611 SKIP_BITS(re, &s->gb, 6);
612 level = SHOW_SBITS(re, &s->gb, 12);
613 LAST_SKIP_BITS(re, &s->gb, 12);
617 level = (-level * qscale * quant_matrix[j]) >> 4;
620 level = (level * qscale * quant_matrix[j]) >> 4;
626 CLOSE_READER(re, &s->gb);
629 check_scantable_index(s, i);
631 s->block_last_index[n] = i;
635 /******************************************/
638 static inline int get_dmv(MpegEncContext *s)
640 if (get_bits1(&s->gb))
641 return 1 - (get_bits1(&s->gb) << 1);
646 /* motion type (for MPEG-2) */
652 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
654 int i, j, k, cbp, val, mb_type, motion_type;
655 const int mb_block_count = 4 + (1 << s->chroma_format);
658 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
660 av_assert2(s->mb_skipped == 0);
662 if (s->mb_skip_run-- != 0) {
663 if (s->pict_type == AV_PICTURE_TYPE_P) {
665 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
666 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
671 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
673 // FIXME not sure if this is allowed in MPEG at all
674 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
675 if (IS_INTRA(mb_type)) {
676 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
677 return AVERROR_INVALIDDATA;
679 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
680 mb_type | MB_TYPE_SKIP;
682 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
689 switch (s->pict_type) {
691 case AV_PICTURE_TYPE_I:
692 if (get_bits1(&s->gb) == 0) {
693 if (get_bits1(&s->gb) == 0) {
694 av_log(s->avctx, AV_LOG_ERROR,
695 "Invalid mb type in I-frame at %d %d\n",
697 return AVERROR_INVALIDDATA;
699 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
701 mb_type = MB_TYPE_INTRA;
704 case AV_PICTURE_TYPE_P:
705 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
707 av_log(s->avctx, AV_LOG_ERROR,
708 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
709 return AVERROR_INVALIDDATA;
711 mb_type = ptype2mb_type[mb_type];
713 case AV_PICTURE_TYPE_B:
714 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
716 av_log(s->avctx, AV_LOG_ERROR,
717 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
718 return AVERROR_INVALIDDATA;
720 mb_type = btype2mb_type[mb_type];
723 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
724 // motion_type = 0; /* avoid warning */
725 if (IS_INTRA(mb_type)) {
726 s->bdsp.clear_blocks(s->block[0]);
728 if (!s->chroma_y_shift)
729 s->bdsp.clear_blocks(s->block[6]);
731 /* compute DCT type */
732 // FIXME: add an interlaced_dct coded var?
733 if (s->picture_structure == PICT_FRAME &&
734 !s->frame_pred_frame_dct)
735 s->interlaced_dct = get_bits1(&s->gb);
737 if (IS_QUANT(mb_type))
738 s->qscale = mpeg_get_qscale(s);
740 if (s->concealment_motion_vectors) {
741 /* just parse them */
742 if (s->picture_structure != PICT_FRAME)
743 skip_bits1(&s->gb); /* field select */
746 s->last_mv[0][0][0] =
747 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
748 s->last_mv[0][0][0]);
750 s->last_mv[0][0][1] =
751 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
752 s->last_mv[0][0][1]);
754 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
756 /* reset mv prediction */
757 memset(s->last_mv, 0, sizeof(s->last_mv));
760 // if 1, we memcpy blocks in xvmcvideo
761 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
762 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
764 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
765 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
766 for (i = 0; i < 6; i++)
767 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
769 for (i = 0; i < mb_block_count; i++)
770 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
774 for (i = 0; i < 6; i++) {
775 ret = ff_mpeg1_decode_block_intra(&s->gb,
777 s->intra_scantable.permutated,
778 s->last_dc, *s->pblocks[i],
781 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
786 s->block_last_index[i] = ret;
790 if (mb_type & MB_TYPE_ZERO_MV) {
791 av_assert2(mb_type & MB_TYPE_CBP);
793 s->mv_dir = MV_DIR_FORWARD;
794 if (s->picture_structure == PICT_FRAME) {
795 if (s->picture_structure == PICT_FRAME
796 && !s->frame_pred_frame_dct)
797 s->interlaced_dct = get_bits1(&s->gb);
798 s->mv_type = MV_TYPE_16X16;
800 s->mv_type = MV_TYPE_FIELD;
801 mb_type |= MB_TYPE_INTERLACED;
802 s->field_select[0][0] = s->picture_structure - 1;
805 if (IS_QUANT(mb_type))
806 s->qscale = mpeg_get_qscale(s);
808 s->last_mv[0][0][0] = 0;
809 s->last_mv[0][0][1] = 0;
810 s->last_mv[0][1][0] = 0;
811 s->last_mv[0][1][1] = 0;
815 av_assert2(mb_type & MB_TYPE_L0L1);
816 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
817 /* get additional motion vector type */
818 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
819 motion_type = MT_FRAME;
821 motion_type = get_bits(&s->gb, 2);
822 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
823 s->interlaced_dct = get_bits1(&s->gb);
826 if (IS_QUANT(mb_type))
827 s->qscale = mpeg_get_qscale(s);
830 s->mv_dir = (mb_type >> 13) & 3;
831 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
832 switch (motion_type) {
833 case MT_FRAME: /* or MT_16X8 */
834 if (s->picture_structure == PICT_FRAME) {
835 mb_type |= MB_TYPE_16x16;
836 s->mv_type = MV_TYPE_16X16;
837 for (i = 0; i < 2; i++) {
838 if (USES_LIST(mb_type, i)) {
841 s->last_mv[i][0][0] =
842 s->last_mv[i][1][0] =
843 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
844 s->last_mv[i][0][0]);
846 s->last_mv[i][0][1] =
847 s->last_mv[i][1][1] =
848 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
849 s->last_mv[i][0][1]);
850 /* full_pel: only for MPEG-1 */
851 if (s->full_pel[i]) {
858 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
859 s->mv_type = MV_TYPE_16X8;
860 for (i = 0; i < 2; i++) {
861 if (USES_LIST(mb_type, i)) {
863 for (j = 0; j < 2; j++) {
864 s->field_select[i][j] = get_bits1(&s->gb);
865 for (k = 0; k < 2; k++) {
866 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
867 s->last_mv[i][j][k]);
868 s->last_mv[i][j][k] = val;
869 s->mv[i][j][k] = val;
877 s->mv_type = MV_TYPE_FIELD;
878 if (s->picture_structure == PICT_FRAME) {
879 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
880 for (i = 0; i < 2; i++) {
881 if (USES_LIST(mb_type, i)) {
882 for (j = 0; j < 2; j++) {
883 s->field_select[i][j] = get_bits1(&s->gb);
884 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
885 s->last_mv[i][j][0]);
886 s->last_mv[i][j][0] = val;
887 s->mv[i][j][0] = val;
888 ff_tlog(s->avctx, "fmx=%d\n", val);
889 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
890 s->last_mv[i][j][1] >> 1);
891 s->last_mv[i][j][1] = 2 * val;
892 s->mv[i][j][1] = val;
893 ff_tlog(s->avctx, "fmy=%d\n", val);
898 av_assert0(!s->progressive_sequence);
899 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
900 for (i = 0; i < 2; i++) {
901 if (USES_LIST(mb_type, i)) {
902 s->field_select[i][0] = get_bits1(&s->gb);
903 for (k = 0; k < 2; k++) {
904 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
905 s->last_mv[i][0][k]);
906 s->last_mv[i][0][k] = val;
907 s->last_mv[i][1][k] = val;
908 s->mv[i][0][k] = val;
915 if (s->progressive_sequence){
916 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
917 return AVERROR_INVALIDDATA;
919 s->mv_type = MV_TYPE_DMV;
920 for (i = 0; i < 2; i++) {
921 if (USES_LIST(mb_type, i)) {
922 int dmx, dmy, mx, my, m;
923 const int my_shift = s->picture_structure == PICT_FRAME;
925 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
926 s->last_mv[i][0][0]);
927 s->last_mv[i][0][0] = mx;
928 s->last_mv[i][1][0] = mx;
930 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
931 s->last_mv[i][0][1] >> my_shift);
935 s->last_mv[i][0][1] = my * (1 << my_shift);
936 s->last_mv[i][1][1] = my * (1 << my_shift);
940 s->mv[i][1][0] = mx; // not used
941 s->mv[i][1][1] = my; // not used
943 if (s->picture_structure == PICT_FRAME) {
944 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
946 // m = 1 + 2 * s->top_field_first;
947 m = s->top_field_first ? 1 : 3;
949 /* top -> top pred */
950 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
951 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
953 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
954 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
956 mb_type |= MB_TYPE_16x16;
958 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
959 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
960 if (s->picture_structure == PICT_TOP_FIELD)
969 av_log(s->avctx, AV_LOG_ERROR,
970 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
971 return AVERROR_INVALIDDATA;
976 if (HAS_CBP(mb_type)) {
977 s->bdsp.clear_blocks(s->block[0]);
979 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
980 if (mb_block_count > 6) {
981 cbp *= 1 << mb_block_count - 6;
982 cbp |= get_bits(&s->gb, mb_block_count - 6);
983 s->bdsp.clear_blocks(s->block[6]);
986 av_log(s->avctx, AV_LOG_ERROR,
987 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
988 return AVERROR_INVALIDDATA;
991 // if 1, we memcpy blocks in xvmcvideo
992 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
993 ff_xvmc_pack_pblocks(s, cbp);
995 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
996 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
997 for (i = 0; i < 6; i++) {
999 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1001 s->block_last_index[i] = -1;
1005 cbp <<= 12 - mb_block_count;
1007 for (i = 0; i < mb_block_count; i++) {
1008 if (cbp & (1 << 11)) {
1009 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1012 s->block_last_index[i] = -1;
1018 if (s->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1019 for (i = 0; i < 6; i++) {
1021 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1023 s->block_last_index[i] = -1;
1027 for (i = 0; i < 6; i++) {
1029 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1032 s->block_last_index[i] = -1;
1039 for (i = 0; i < 12; i++)
1040 s->block_last_index[i] = -1;
1044 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1049 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1051 Mpeg1Context *s = avctx->priv_data;
1052 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1054 if ( avctx->codec_tag != AV_RL32("VCR2")
1055 && avctx->codec_tag != AV_RL32("BW10"))
1056 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1057 ff_mpv_decode_init(s2, avctx);
1059 /* we need some permutation to store matrices,
1060 * until the decoder sets the real permutation. */
1061 ff_mpv_idct_init(s2);
1062 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1063 ff_mpeg12_init_vlcs();
1065 s2->chroma_format = 1;
1066 s->mpeg_enc_ctx_allocated = 0;
1067 s->mpeg_enc_ctx.picture_number = 0;
1068 s->repeat_field = 0;
1069 avctx->color_range = AVCOL_RANGE_MPEG;
1074 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1075 const AVCodecContext *avctx_from)
1077 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1078 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1081 if (avctx == avctx_from ||
1082 !ctx_from->mpeg_enc_ctx_allocated ||
1083 !s1->context_initialized)
1086 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1090 if (!ctx->mpeg_enc_ctx_allocated)
1091 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1093 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1094 s->picture_number++;
1100 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1101 const uint8_t *new_perm)
1103 uint16_t temp_matrix[64];
1106 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1108 for (i = 0; i < 64; i++)
1109 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1112 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1113 #if CONFIG_MPEG1_NVDEC_HWACCEL
1116 #if CONFIG_MPEG1_XVMC_HWACCEL
1119 #if CONFIG_MPEG1_VDPAU_HWACCEL
1126 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1127 #if CONFIG_MPEG2_NVDEC_HWACCEL
1130 #if CONFIG_MPEG2_XVMC_HWACCEL
1133 #if CONFIG_MPEG2_VDPAU_HWACCEL
1136 #if CONFIG_MPEG2_DXVA2_HWACCEL
1137 AV_PIX_FMT_DXVA2_VLD,
1139 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1140 AV_PIX_FMT_D3D11VA_VLD,
1143 #if CONFIG_MPEG2_VAAPI_HWACCEL
1146 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
1147 AV_PIX_FMT_VIDEOTOOLBOX,
1153 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1158 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1163 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1165 Mpeg1Context *s1 = avctx->priv_data;
1166 MpegEncContext *s = &s1->mpeg_enc_ctx;
1167 const enum AVPixelFormat *pix_fmts;
1169 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
1170 return AV_PIX_FMT_GRAY8;
1172 if (s->chroma_format < 2)
1173 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1174 mpeg1_hwaccel_pixfmt_list_420 :
1175 mpeg2_hwaccel_pixfmt_list_420;
1176 else if (s->chroma_format == 2)
1177 pix_fmts = mpeg12_pixfmt_list_422;
1179 pix_fmts = mpeg12_pixfmt_list_444;
1181 return ff_thread_get_format(avctx, pix_fmts);
1184 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1186 // until then pix_fmt may be changed right after codec init
1188 if (avctx->idct_algo == FF_IDCT_AUTO)
1189 avctx->idct_algo = FF_IDCT_NONE;
1191 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1192 Mpeg1Context *s1 = avctx->priv_data;
1193 MpegEncContext *s = &s1->mpeg_enc_ctx;
1195 s->pack_pblocks = 1;
1199 /* Call this function when we know all parameters.
1200 * It may be called in different places for MPEG-1 and MPEG-2. */
1201 static int mpeg_decode_postinit(AVCodecContext *avctx)
1203 Mpeg1Context *s1 = avctx->priv_data;
1204 MpegEncContext *s = &s1->mpeg_enc_ctx;
1205 uint8_t old_permutation[64];
1208 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1210 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1211 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
1214 if (s->aspect_ratio_info > 1) {
1216 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1217 (AVRational) { s1->pan_scan.width,
1218 s1->pan_scan.height }),
1219 (AVRational) { s->width, s->height });
1221 /* We ignore the spec here and guess a bit as reality does not
1222 * match the spec, see for example res_change_ffmpeg_aspect.ts
1223 * and sequence-display-aspect.mpg.
1224 * issue1613, 621, 562 */
1225 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1226 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1227 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1228 s->avctx->sample_aspect_ratio =
1229 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1230 (AVRational) { s->width, s->height });
1232 s->avctx->sample_aspect_ratio =
1233 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1234 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1235 // issue1613 4/3 16/9 -> 16/9
1236 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1237 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1238 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1239 ff_dlog(avctx, "aspect A %d/%d\n",
1240 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1241 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1242 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1243 s->avctx->sample_aspect_ratio.den);
1246 s->avctx->sample_aspect_ratio =
1247 ff_mpeg2_aspect[s->aspect_ratio_info];
1251 if (av_image_check_sar(s->width, s->height,
1252 avctx->sample_aspect_ratio) < 0) {
1253 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1254 avctx->sample_aspect_ratio.num,
1255 avctx->sample_aspect_ratio.den);
1256 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1259 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1260 avctx->coded_width != s->width ||
1261 avctx->coded_height != s->height ||
1262 s1->save_width != s->width ||
1263 s1->save_height != s->height ||
1264 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1265 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1267 if (s1->mpeg_enc_ctx_allocated) {
1268 ParseContext pc = s->parse_context;
1269 s->parse_context.buffer = 0;
1270 ff_mpv_common_end(s);
1271 s->parse_context = pc;
1272 s1->mpeg_enc_ctx_allocated = 0;
1275 ret = ff_set_dimensions(avctx, s->width, s->height);
1279 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1280 avctx->rc_max_rate = s->bit_rate;
1281 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1282 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1283 avctx->bit_rate = s->bit_rate;
1285 s1->save_aspect = s->avctx->sample_aspect_ratio;
1286 s1->save_width = s->width;
1287 s1->save_height = s->height;
1288 s1->save_progressive_seq = s->progressive_sequence;
1290 /* low_delay may be forced, in this case we will have B-frames
1291 * that behave like P-frames. */
1292 avctx->has_b_frames = !s->low_delay;
1294 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1296 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1297 avctx->ticks_per_frame = 1;
1299 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1302 av_reduce(&s->avctx->framerate.num,
1303 &s->avctx->framerate.den,
1304 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1305 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1307 avctx->ticks_per_frame = 2;
1309 switch (s->chroma_format) {
1310 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1312 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1313 default: av_assert0(0);
1317 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1318 setup_hwaccel_for_pixfmt(avctx);
1320 /* Quantization matrices may need reordering
1321 * if DCT permutation is changed. */
1322 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1324 ff_mpv_idct_init(s);
1325 if ((ret = ff_mpv_common_init(s)) < 0)
1328 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1329 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1330 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1331 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1333 s1->mpeg_enc_ctx_allocated = 1;
1338 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1341 Mpeg1Context *s1 = avctx->priv_data;
1342 MpegEncContext *s = &s1->mpeg_enc_ctx;
1343 int ref, f_code, vbv_delay;
1345 init_get_bits(&s->gb, buf, buf_size * 8);
1347 ref = get_bits(&s->gb, 10); /* temporal ref */
1348 s->pict_type = get_bits(&s->gb, 3);
1349 if (s->pict_type == 0 || s->pict_type > 3)
1350 return AVERROR_INVALIDDATA;
1352 vbv_delay = get_bits(&s->gb, 16);
1353 s->vbv_delay = vbv_delay;
1354 if (s->pict_type == AV_PICTURE_TYPE_P ||
1355 s->pict_type == AV_PICTURE_TYPE_B) {
1356 s->full_pel[0] = get_bits1(&s->gb);
1357 f_code = get_bits(&s->gb, 3);
1358 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1359 return AVERROR_INVALIDDATA;
1361 s->mpeg_f_code[0][0] = f_code;
1362 s->mpeg_f_code[0][1] = f_code;
1364 if (s->pict_type == AV_PICTURE_TYPE_B) {
1365 s->full_pel[1] = get_bits1(&s->gb);
1366 f_code = get_bits(&s->gb, 3);
1367 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1368 return AVERROR_INVALIDDATA;
1370 s->mpeg_f_code[1][0] = f_code;
1371 s->mpeg_f_code[1][1] = f_code;
1373 s->current_picture.f->pict_type = s->pict_type;
1374 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1376 if (avctx->debug & FF_DEBUG_PICT_INFO)
1377 av_log(avctx, AV_LOG_DEBUG,
1378 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1385 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1387 MpegEncContext *s = &s1->mpeg_enc_ctx;
1388 int horiz_size_ext, vert_size_ext;
1390 AVCPBProperties *cpb_props;
1392 skip_bits(&s->gb, 1); /* profile and level esc*/
1393 s->avctx->profile = get_bits(&s->gb, 3);
1394 s->avctx->level = get_bits(&s->gb, 4);
1395 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1396 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1398 if (!s->chroma_format) {
1399 s->chroma_format = 1;
1400 av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1403 horiz_size_ext = get_bits(&s->gb, 2);
1404 vert_size_ext = get_bits(&s->gb, 2);
1405 s->width |= (horiz_size_ext << 12);
1406 s->height |= (vert_size_ext << 12);
1407 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1408 s->bit_rate += (bit_rate_ext << 18) * 400LL;
1409 check_marker(s->avctx, &s->gb, "after bit rate extension");
1410 s1->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1412 s->low_delay = get_bits1(&s->gb);
1413 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1416 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1417 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1419 ff_dlog(s->avctx, "sequence extension\n");
1420 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1422 if (cpb_props = ff_add_cpb_side_data(s->avctx)) {
1423 cpb_props->buffer_size = s1->rc_buffer_size;
1424 if (s->bit_rate != 0x3FFFF*400)
1425 cpb_props->max_bitrate = s->bit_rate;
1428 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1429 av_log(s->avctx, AV_LOG_DEBUG,
1430 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1431 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1432 s1->rc_buffer_size, s->bit_rate);
1435 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1437 MpegEncContext *s = &s1->mpeg_enc_ctx;
1438 int color_description, w, h;
1440 skip_bits(&s->gb, 3); /* video format */
1441 color_description = get_bits1(&s->gb);
1442 if (color_description) {
1443 s->avctx->color_primaries = get_bits(&s->gb, 8);
1444 s->avctx->color_trc = get_bits(&s->gb, 8);
1445 s->avctx->colorspace = get_bits(&s->gb, 8);
1447 w = get_bits(&s->gb, 14);
1448 skip_bits(&s->gb, 1); // marker
1449 h = get_bits(&s->gb, 14);
1450 // remaining 3 bits are zero padding
1452 s1->pan_scan.width = 16 * w;
1453 s1->pan_scan.height = 16 * h;
1455 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1456 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1459 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1461 MpegEncContext *s = &s1->mpeg_enc_ctx;
1465 if (s->progressive_sequence) {
1466 if (s->repeat_first_field) {
1468 if (s->top_field_first)
1472 if (s->picture_structure == PICT_FRAME) {
1474 if (s->repeat_first_field)
1478 for (i = 0; i < nofco; i++) {
1479 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1480 skip_bits(&s->gb, 1); // marker
1481 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1482 skip_bits(&s->gb, 1); // marker
1485 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1486 av_log(s->avctx, AV_LOG_DEBUG,
1487 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1488 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1489 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1490 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1493 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1494 uint16_t matrix1[64], int intra)
1498 for (i = 0; i < 64; i++) {
1499 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1500 int v = get_bits(&s->gb, 8);
1502 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1503 return AVERROR_INVALIDDATA;
1505 if (intra && i == 0 && v != 8) {
1506 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1507 v = 8; // needed by pink.mpg / issue1046
1516 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1518 ff_dlog(s->avctx, "matrix extension\n");
1520 if (get_bits1(&s->gb))
1521 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1522 if (get_bits1(&s->gb))
1523 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1524 if (get_bits1(&s->gb))
1525 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1526 if (get_bits1(&s->gb))
1527 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1530 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1532 MpegEncContext *s = &s1->mpeg_enc_ctx;
1534 s->full_pel[0] = s->full_pel[1] = 0;
1535 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1536 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1537 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1538 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1539 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1540 av_log(s->avctx, AV_LOG_ERROR,
1541 "Missing picture start code, guessing missing values\n");
1542 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1543 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1544 s->pict_type = AV_PICTURE_TYPE_I;
1546 s->pict_type = AV_PICTURE_TYPE_P;
1548 s->pict_type = AV_PICTURE_TYPE_B;
1549 s->current_picture.f->pict_type = s->pict_type;
1550 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1552 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1553 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1554 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1555 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1557 s->intra_dc_precision = get_bits(&s->gb, 2);
1558 s->picture_structure = get_bits(&s->gb, 2);
1559 s->top_field_first = get_bits1(&s->gb);
1560 s->frame_pred_frame_dct = get_bits1(&s->gb);
1561 s->concealment_motion_vectors = get_bits1(&s->gb);
1562 s->q_scale_type = get_bits1(&s->gb);
1563 s->intra_vlc_format = get_bits1(&s->gb);
1564 s->alternate_scan = get_bits1(&s->gb);
1565 s->repeat_first_field = get_bits1(&s->gb);
1566 s->chroma_420_type = get_bits1(&s->gb);
1567 s->progressive_frame = get_bits1(&s->gb);
1569 if (s->alternate_scan) {
1570 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1571 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1573 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1574 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1577 /* composite display not parsed */
1578 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1579 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1580 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1581 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1582 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1583 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1584 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1585 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1586 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1589 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1591 AVCodecContext *avctx = s->avctx;
1592 Mpeg1Context *s1 = (Mpeg1Context *) s;
1595 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1596 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1597 return AVERROR_INVALIDDATA;
1600 /* start frame decoding */
1601 if (s->first_field || s->picture_structure == PICT_FRAME) {
1602 AVFrameSideData *pan_scan;
1604 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1607 ff_mpeg_er_frame_start(s);
1609 /* first check if we must repeat the frame */
1610 s->current_picture_ptr->f->repeat_pict = 0;
1611 if (s->repeat_first_field) {
1612 if (s->progressive_sequence) {
1613 if (s->top_field_first)
1614 s->current_picture_ptr->f->repeat_pict = 4;
1616 s->current_picture_ptr->f->repeat_pict = 2;
1617 } else if (s->progressive_frame) {
1618 s->current_picture_ptr->f->repeat_pict = 1;
1622 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1623 AV_FRAME_DATA_PANSCAN,
1624 sizeof(s1->pan_scan));
1626 return AVERROR(ENOMEM);
1627 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1629 if (s1->a53_buf_ref) {
1630 AVFrameSideData *sd = av_frame_new_side_data_from_buf(
1631 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1634 av_buffer_unref(&s1->a53_buf_ref);
1635 s1->a53_buf_ref = NULL;
1638 if (s1->has_stereo3d) {
1639 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1641 return AVERROR(ENOMEM);
1643 *stereo = s1->stereo3d;
1644 s1->has_stereo3d = 0;
1648 AVFrameSideData *sd =
1649 av_frame_new_side_data(s->current_picture_ptr->f,
1650 AV_FRAME_DATA_AFD, 1);
1652 return AVERROR(ENOMEM);
1654 *sd->data = s1->afd;
1658 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1659 ff_thread_finish_setup(avctx);
1660 } else { // second field
1663 if (!s->current_picture_ptr) {
1664 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1665 return AVERROR_INVALIDDATA;
1668 if (s->avctx->hwaccel) {
1669 if ((ret = s->avctx->hwaccel->end_frame(s->avctx)) < 0) {
1670 av_log(avctx, AV_LOG_ERROR,
1671 "hardware accelerator failed to decode first field\n");
1676 for (i = 0; i < 4; i++) {
1677 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1678 if (s->picture_structure == PICT_BOTTOM_FIELD)
1679 s->current_picture.f->data[i] +=
1680 s->current_picture_ptr->f->linesize[i];
1684 if (avctx->hwaccel) {
1685 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1692 #define DECODE_SLICE_ERROR -1
1693 #define DECODE_SLICE_OK 0
1697 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1698 * @return DECODE_SLICE_ERROR if the slice is damaged,
1699 * DECODE_SLICE_OK if this slice is OK
1701 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1702 const uint8_t **buf, int buf_size)
1704 AVCodecContext *avctx = s->avctx;
1705 const int lowres = s->avctx->lowres;
1706 const int field_pic = s->picture_structure != PICT_FRAME;
1710 s->resync_mb_y = -1;
1712 av_assert0(mb_y < s->mb_height);
1714 init_get_bits(&s->gb, *buf, buf_size * 8);
1715 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1716 skip_bits(&s->gb, 3);
1718 ff_mpeg1_clean_buffers(s);
1719 s->interlaced_dct = 0;
1721 s->qscale = mpeg_get_qscale(s);
1723 if (s->qscale == 0) {
1724 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1725 return AVERROR_INVALIDDATA;
1728 /* extra slice info */
1729 if (skip_1stop_8data_bits(&s->gb) < 0)
1730 return AVERROR_INVALIDDATA;
1734 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1737 while (get_bits_left(&s->gb) > 0) {
1738 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1739 MBINCR_VLC_BITS, 2);
1741 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1742 return AVERROR_INVALIDDATA;
1747 /* otherwise, stuffing, nothing to do */
1755 if (s->mb_x >= (unsigned) s->mb_width) {
1756 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1757 return AVERROR_INVALIDDATA;
1760 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1761 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1762 int start_code = -1;
1763 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1764 if (buf_end < *buf + buf_size)
1767 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1768 return DECODE_SLICE_ERROR;
1770 return DECODE_SLICE_OK;
1773 s->resync_mb_x = s->mb_x;
1774 s->resync_mb_y = s->mb_y = mb_y;
1776 ff_init_block_index(s);
1778 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1779 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1780 av_log(s->avctx, AV_LOG_DEBUG,
1781 "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",
1783 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1784 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1785 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1786 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1787 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1788 s->progressive_sequence ? "ps" : "",
1789 s->progressive_frame ? "pf" : "",
1790 s->alternate_scan ? "alt" : "",
1791 s->top_field_first ? "top" : "",
1792 s->intra_dc_precision, s->picture_structure,
1793 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1794 s->q_scale_type, s->intra_vlc_format,
1795 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1800 // If 1, we memcpy blocks in xvmcvideo.
1801 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1802 ff_xvmc_init_block(s); // set s->block
1804 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1807 // Note motion_val is normally NULL unless we want to extract the MVs.
1808 if (s->current_picture.motion_val[0] && !s->encoding) {
1809 const int wrap = s->b8_stride;
1810 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1811 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1812 int motion_x, motion_y, dir, i;
1814 for (i = 0; i < 2; i++) {
1815 for (dir = 0; dir < 2; dir++) {
1817 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1818 motion_x = motion_y = 0;
1819 } else if (s->mv_type == MV_TYPE_16X16 ||
1820 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1821 motion_x = s->mv[dir][0][0];
1822 motion_y = s->mv[dir][0][1];
1823 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1824 motion_x = s->mv[dir][i][0];
1825 motion_y = s->mv[dir][i][1];
1828 s->current_picture.motion_val[dir][xy][0] = motion_x;
1829 s->current_picture.motion_val[dir][xy][1] = motion_y;
1830 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1831 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1832 s->current_picture.ref_index [dir][b8_xy] =
1833 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1834 av_assert2(s->field_select[dir][i] == 0 ||
1835 s->field_select[dir][i] == 1);
1842 s->dest[0] += 16 >> lowres;
1843 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1844 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1846 ff_mpv_reconstruct_mb(s, s->block);
1848 if (++s->mb_x >= s->mb_width) {
1849 const int mb_size = 16 >> s->avctx->lowres;
1852 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1853 ff_mpv_report_decode_progress(s);
1856 s->mb_y += 1 << field_pic;
1858 if (s->mb_y >= s->mb_height) {
1859 int left = get_bits_left(&s->gb);
1860 int is_d10 = s->chroma_format == 2 &&
1861 s->pict_type == AV_PICTURE_TYPE_I &&
1862 avctx->profile == 0 && avctx->level == 5 &&
1863 s->intra_dc_precision == 2 &&
1864 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1865 s->progressive_frame == 0
1866 /* vbv_delay == 0xBBB || 0xE10 */;
1868 if (left >= 32 && !is_d10) {
1869 GetBitContext gb = s->gb;
1870 align_get_bits(&gb);
1871 if (show_bits(&gb, 24) == 0x060E2B) {
1872 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1875 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1876 av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1882 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1883 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1884 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1885 left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1886 return AVERROR_INVALIDDATA;
1890 // There are some files out there which are missing the last slice
1891 // in cases where the slice is completely outside the visible
1892 // area, we detect this here instead of running into the end expecting
1894 left = get_bits_left(&s->gb);
1895 if (s->mb_y >= ((s->height + 15) >> 4) &&
1896 !s->progressive_sequence &&
1899 s->mb_skip_run == -1 &&
1900 (!left || show_bits(&s->gb, left) == 0))
1903 ff_init_block_index(s);
1906 /* skip mb handling */
1907 if (s->mb_skip_run == -1) {
1908 /* read increment again */
1911 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1912 MBINCR_VLC_BITS, 2);
1914 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1915 return AVERROR_INVALIDDATA;
1919 s->mb_skip_run += 33;
1920 } else if (code == 35) {
1921 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1922 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1923 return AVERROR_INVALIDDATA;
1925 goto eos; /* end of slice */
1927 /* otherwise, stuffing, nothing to do */
1929 s->mb_skip_run += code;
1933 if (s->mb_skip_run) {
1935 if (s->pict_type == AV_PICTURE_TYPE_I) {
1936 av_log(s->avctx, AV_LOG_ERROR,
1937 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1938 return AVERROR_INVALIDDATA;
1943 for (i = 0; i < 12; i++)
1944 s->block_last_index[i] = -1;
1945 if (s->picture_structure == PICT_FRAME)
1946 s->mv_type = MV_TYPE_16X16;
1948 s->mv_type = MV_TYPE_FIELD;
1949 if (s->pict_type == AV_PICTURE_TYPE_P) {
1950 /* if P type, zero motion vector is implied */
1951 s->mv_dir = MV_DIR_FORWARD;
1952 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1953 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1954 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1955 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1957 /* if B type, reuse previous vectors and directions */
1958 s->mv[0][0][0] = s->last_mv[0][0][0];
1959 s->mv[0][0][1] = s->last_mv[0][0][1];
1960 s->mv[1][0][0] = s->last_mv[1][0][0];
1961 s->mv[1][0][1] = s->last_mv[1][0][1];
1962 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1963 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1968 eos: // end of slice
1969 if (get_bits_left(&s->gb) < 0) {
1970 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1971 return AVERROR_INVALIDDATA;
1973 *buf += (get_bits_count(&s->gb) - 1) / 8;
1974 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);
1978 static int slice_decode_thread(AVCodecContext *c, void *arg)
1980 MpegEncContext *s = *(void **) arg;
1981 const uint8_t *buf = s->gb.buffer;
1982 int mb_y = s->start_mb_y;
1983 const int field_pic = s->picture_structure != PICT_FRAME;
1985 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1988 uint32_t start_code;
1991 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1993 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1994 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1995 s->start_mb_y, s->end_mb_y, s->er.error_count);
1997 if (c->err_recognition & AV_EF_EXPLODE)
1999 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2000 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2002 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2004 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2005 s->mb_x - 1, s->mb_y,
2006 ER_AC_END | ER_DC_END | ER_MV_END);
2009 if (s->mb_y == s->end_mb_y)
2013 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2014 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
2015 return AVERROR_INVALIDDATA;
2016 mb_y = start_code - SLICE_MIN_START_CODE;
2017 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2018 mb_y += (*buf&0xE0)<<2;
2020 if (s->picture_structure == PICT_BOTTOM_FIELD)
2022 if (mb_y >= s->end_mb_y)
2023 return AVERROR_INVALIDDATA;
2028 * Handle slice ends.
2029 * @return 1 if it seems to be the last slice
2031 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2033 Mpeg1Context *s1 = avctx->priv_data;
2034 MpegEncContext *s = &s1->mpeg_enc_ctx;
2036 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2039 if (s->avctx->hwaccel) {
2040 int ret = s->avctx->hwaccel->end_frame(s->avctx);
2042 av_log(avctx, AV_LOG_ERROR,
2043 "hardware accelerator failed to decode picture\n");
2048 /* end of slice reached */
2049 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2052 ff_er_frame_end(&s->er);
2054 ff_mpv_frame_end(s);
2056 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2057 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2060 ff_print_debug_info(s, s->current_picture_ptr, pict);
2061 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2063 if (avctx->active_thread_type & FF_THREAD_FRAME)
2064 s->picture_number++;
2065 /* latency of 1 frame for I- and P-frames */
2066 /* XXX: use another variable than picture_number */
2067 if (s->last_picture_ptr) {
2068 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2071 ff_print_debug_info(s, s->last_picture_ptr, pict);
2072 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2082 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2083 const uint8_t *buf, int buf_size)
2085 Mpeg1Context *s1 = avctx->priv_data;
2086 MpegEncContext *s = &s1->mpeg_enc_ctx;
2090 init_get_bits(&s->gb, buf, buf_size * 8);
2092 width = get_bits(&s->gb, 12);
2093 height = get_bits(&s->gb, 12);
2094 if (width == 0 || height == 0) {
2095 av_log(avctx, AV_LOG_WARNING,
2096 "Invalid horizontal or vertical size value.\n");
2097 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2098 return AVERROR_INVALIDDATA;
2100 s->aspect_ratio_info = get_bits(&s->gb, 4);
2101 if (s->aspect_ratio_info == 0) {
2102 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2103 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2104 return AVERROR_INVALIDDATA;
2106 s->frame_rate_index = get_bits(&s->gb, 4);
2107 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2108 av_log(avctx, AV_LOG_WARNING,
2109 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2110 s->frame_rate_index = 1;
2112 s->bit_rate = get_bits(&s->gb, 18) * 400LL;
2113 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
2114 return AVERROR_INVALIDDATA;
2117 s1->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2118 skip_bits(&s->gb, 1);
2121 if (get_bits1(&s->gb)) {
2122 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2124 for (i = 0; i < 64; i++) {
2125 j = s->idsp.idct_permutation[i];
2126 v = ff_mpeg1_default_intra_matrix[i];
2127 s->intra_matrix[j] = v;
2128 s->chroma_intra_matrix[j] = v;
2131 if (get_bits1(&s->gb)) {
2132 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2134 for (i = 0; i < 64; i++) {
2135 int j = s->idsp.idct_permutation[i];
2136 v = ff_mpeg1_default_non_intra_matrix[i];
2137 s->inter_matrix[j] = v;
2138 s->chroma_inter_matrix[j] = v;
2142 if (show_bits(&s->gb, 23) != 0) {
2143 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2144 return AVERROR_INVALIDDATA;
2150 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2151 s->progressive_sequence = 1;
2152 s->progressive_frame = 1;
2153 s->picture_structure = PICT_FRAME;
2155 s->frame_pred_frame_dct = 1;
2156 s->chroma_format = 1;
2158 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2159 s->out_format = FMT_MPEG1;
2160 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2161 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
2164 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2165 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
2166 s1->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2171 static int vcr2_init_sequence(AVCodecContext *avctx)
2173 Mpeg1Context *s1 = avctx->priv_data;
2174 MpegEncContext *s = &s1->mpeg_enc_ctx;
2177 /* start new MPEG-1 context decoding */
2178 s->out_format = FMT_MPEG1;
2179 if (s1->mpeg_enc_ctx_allocated) {
2180 ff_mpv_common_end(s);
2181 s1->mpeg_enc_ctx_allocated = 0;
2183 s->width = avctx->coded_width;
2184 s->height = avctx->coded_height;
2185 avctx->has_b_frames = 0; // true?
2188 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2189 setup_hwaccel_for_pixfmt(avctx);
2191 ff_mpv_idct_init(s);
2192 if ((ret = ff_mpv_common_init(s)) < 0)
2194 s1->mpeg_enc_ctx_allocated = 1;
2196 for (i = 0; i < 64; i++) {
2197 int j = s->idsp.idct_permutation[i];
2198 v = ff_mpeg1_default_intra_matrix[i];
2199 s->intra_matrix[j] = v;
2200 s->chroma_intra_matrix[j] = v;
2202 v = ff_mpeg1_default_non_intra_matrix[i];
2203 s->inter_matrix[j] = v;
2204 s->chroma_inter_matrix[j] = v;
2207 s->progressive_sequence = 1;
2208 s->progressive_frame = 1;
2209 s->picture_structure = PICT_FRAME;
2211 s->frame_pred_frame_dct = 1;
2212 s->chroma_format = 1;
2213 if (s->codec_tag == AV_RL32("BW10")) {
2214 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2216 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2217 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2219 s1->save_width = s->width;
2220 s1->save_height = s->height;
2221 s1->save_progressive_seq = s->progressive_sequence;
2225 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2226 const uint8_t *p, int buf_size)
2228 Mpeg1Context *s1 = avctx->priv_data;
2230 if (buf_size >= 6 &&
2231 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2232 p[4] == 3 && (p[5] & 0x40)) {
2233 /* extract A53 Part 4 CC data */
2234 int cc_count = p[5] & 0x1f;
2235 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2236 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2237 const uint64_t new_size = (old_size + cc_count
2241 if (new_size > 3*A53_MAX_CC_COUNT)
2242 return AVERROR(EINVAL);
2244 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2246 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
2248 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2251 } else if (buf_size >= 2 &&
2252 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
2253 /* extract SCTE-20 CC data */
2258 init_get_bits(&gb, p + 2, buf_size - 2);
2259 cc_count = get_bits(&gb, 5);
2261 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2262 const uint64_t new_size = (old_size + cc_count
2264 if (new_size > 3*A53_MAX_CC_COUNT)
2265 return AVERROR(EINVAL);
2267 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2269 uint8_t field, cc1, cc2;
2270 uint8_t *cap = s1->a53_buf_ref->data;
2272 memset(s1->a53_buf_ref->data + old_size, 0, cc_count * 3);
2273 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
2274 skip_bits(&gb, 2); // priority
2275 field = get_bits(&gb, 2);
2276 skip_bits(&gb, 5); // line_offset
2277 cc1 = get_bits(&gb, 8);
2278 cc2 = get_bits(&gb, 8);
2279 skip_bits(&gb, 1); // marker
2281 if (!field) { // forbidden
2282 cap[0] = cap[1] = cap[2] = 0x00;
2284 field = (field == 2 ? 1 : 0);
2285 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
2286 cap[0] = 0x04 | field;
2287 cap[1] = ff_reverse[cc1];
2288 cap[2] = ff_reverse[cc2];
2293 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2296 } else if (buf_size >= 11 &&
2297 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2298 /* extract DVD CC data
2300 * uint32_t user_data_start_code 0x000001B2 (big endian)
2301 * uint16_t user_identifier 0x4343 "CC"
2302 * uint8_t user_data_type_code 0x01
2303 * uint8_t caption_block_size 0xF8
2305 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
2306 * bit 6 caption_filler 0
2307 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
2308 * bit 0 caption_extra_field_added 1=one additional caption word
2310 * struct caption_field_block {
2312 * bit 7:1 caption_filler 0x7F (all 1s)
2313 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
2314 * uint8_t caption_first_byte
2315 * uint8_t caption_second_byte
2316 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
2318 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
2319 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
2320 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
2321 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
2322 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
2325 // There is a caption count field in the data, but it is often
2326 // incorrect. So count the number of captions present.
2327 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2329 // Transform the DVD format into A53 Part 4 format
2331 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2332 const uint64_t new_size = (old_size + cc_count
2334 if (new_size > 3*A53_MAX_CC_COUNT)
2335 return AVERROR(EINVAL);
2337 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2339 uint8_t field1 = !!(p[4] & 0x80);
2340 uint8_t *cap = s1->a53_buf_ref->data;
2342 for (i = 0; i < cc_count; i++) {
2343 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2346 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2353 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
2360 static void mpeg_decode_user_data(AVCodecContext *avctx,
2361 const uint8_t *p, int buf_size)
2363 Mpeg1Context *s = avctx->priv_data;
2364 const uint8_t *buf_end = p + buf_size;
2365 Mpeg1Context *s1 = avctx->priv_data;
2369 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2370 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2372 av_log(avctx, AV_LOG_ERROR, "\n");
2378 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2382 /* we parse the DTG active format information */
2383 if (buf_end - p >= 5 &&
2384 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2392 if (buf_end - p < 1)
2395 s1->afd = p[0] & 0x0f;
2397 } else if (buf_end - p >= 6 &&
2398 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2399 p[4] == 0x03) { // S3D_video_format_length
2400 // the 0x7F mask ignores the reserved_bit value
2401 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2403 if (S3D_video_format_type == 0x03 ||
2404 S3D_video_format_type == 0x04 ||
2405 S3D_video_format_type == 0x08 ||
2406 S3D_video_format_type == 0x23) {
2408 s1->has_stereo3d = 1;
2410 switch (S3D_video_format_type) {
2412 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2415 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2418 s1->stereo3d.type = AV_STEREO3D_2D;
2421 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2425 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2430 static void mpeg_decode_gop(AVCodecContext *avctx,
2431 const uint8_t *buf, int buf_size)
2433 Mpeg1Context *s1 = avctx->priv_data;
2434 MpegEncContext *s = &s1->mpeg_enc_ctx;
2438 init_get_bits(&s->gb, buf, buf_size * 8);
2440 tc = s-> timecode_frame_start = get_bits(&s->gb, 25);
2442 s->closed_gop = get_bits1(&s->gb);
2443 /* broken_link indicates that after editing the
2444 * reference frames of the first B-Frames after GOP I-Frame
2445 * are missing (open gop) */
2446 broken_link = get_bits1(&s->gb);
2448 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2449 char tcbuf[AV_TIMECODE_STR_SIZE];
2450 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2451 av_log(s->avctx, AV_LOG_DEBUG,
2452 "GOP (%s) closed_gop=%d broken_link=%d\n",
2453 tcbuf, s->closed_gop, broken_link);
2457 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2458 int *got_output, const uint8_t *buf, int buf_size)
2460 Mpeg1Context *s = avctx->priv_data;
2461 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2462 const uint8_t *buf_ptr = buf;
2463 const uint8_t *buf_end = buf + buf_size;
2464 int ret, input_size;
2465 int last_code = 0, skip_frame = 0;
2466 int picture_start_code_seen = 0;
2469 /* find next start code */
2470 uint32_t start_code = -1;
2471 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2472 if (start_code > 0x1ff) {
2475 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2478 av_assert0(avctx->thread_count > 1);
2480 avctx->execute(avctx, slice_decode_thread,
2481 &s2->thread_context[0], NULL,
2482 s->slice_count, sizeof(void *));
2483 for (i = 0; i < s->slice_count; i++)
2484 s2->er.error_count += s2->thread_context[i]->er.error_count;
2487 ret = slice_end(avctx, picture);
2491 // FIXME: merge with the stuff in mpeg_decode_slice
2492 if (s2->last_picture_ptr || s2->low_delay || s2->pict_type == AV_PICTURE_TYPE_B)
2498 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2499 return AVERROR_INVALIDDATA;
2501 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2504 input_size = buf_end - buf_ptr;
2506 if (avctx->debug & FF_DEBUG_STARTCODE)
2507 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2508 start_code, buf_ptr - buf, input_size);
2510 /* prepare data for next start code */
2511 switch (start_code) {
2512 case SEQ_START_CODE:
2513 if (last_code == 0) {
2514 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2515 if (buf != avctx->extradata)
2518 av_log(avctx, AV_LOG_ERROR,
2519 "ignoring SEQ_START_CODE after %X\n", last_code);
2520 if (avctx->err_recognition & AV_EF_EXPLODE)
2521 return AVERROR_INVALIDDATA;
2525 case PICTURE_START_CODE:
2526 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2527 /* If it's a frame picture, there can't be more than one picture header.
2528 Yet, it does happen and we need to handle it. */
2529 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2532 picture_start_code_seen = 1;
2534 if (s2->width <= 0 || s2->height <= 0) {
2535 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2536 s2->width, s2->height);
2537 return AVERROR_INVALIDDATA;
2541 s2->intra_dc_precision= 3;
2542 s2->intra_matrix[0]= 1;
2544 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2545 !avctx->hwaccel && s->slice_count) {
2548 avctx->execute(avctx, slice_decode_thread,
2549 s2->thread_context, NULL,
2550 s->slice_count, sizeof(void *));
2551 for (i = 0; i < s->slice_count; i++)
2552 s2->er.error_count += s2->thread_context[i]->er.error_count;
2555 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2556 ret = mpeg_decode_postinit(avctx);
2558 av_log(avctx, AV_LOG_ERROR,
2559 "mpeg_decode_postinit() failure\n");
2563 /* We have a complete image: we try to decompress it. */
2564 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2567 last_code = PICTURE_START_CODE;
2569 av_log(avctx, AV_LOG_ERROR,
2570 "ignoring pic after %X\n", last_code);
2571 if (avctx->err_recognition & AV_EF_EXPLODE)
2572 return AVERROR_INVALIDDATA;
2575 case EXT_START_CODE:
2576 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2578 switch (get_bits(&s2->gb, 4)) {
2580 if (last_code == 0) {
2581 mpeg_decode_sequence_extension(s);
2583 av_log(avctx, AV_LOG_ERROR,
2584 "ignoring seq ext after %X\n", last_code);
2585 if (avctx->err_recognition & AV_EF_EXPLODE)
2586 return AVERROR_INVALIDDATA;
2590 mpeg_decode_sequence_display_extension(s);
2593 mpeg_decode_quant_matrix_extension(s2);
2596 mpeg_decode_picture_display_extension(s);
2599 if (last_code == PICTURE_START_CODE) {
2600 mpeg_decode_picture_coding_extension(s);
2602 av_log(avctx, AV_LOG_ERROR,
2603 "ignoring pic cod ext after %X\n", last_code);
2604 if (avctx->err_recognition & AV_EF_EXPLODE)
2605 return AVERROR_INVALIDDATA;
2610 case USER_START_CODE:
2611 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2613 case GOP_START_CODE:
2614 if (last_code == 0) {
2615 s2->first_field = 0;
2616 mpeg_decode_gop(avctx, buf_ptr, input_size);
2619 av_log(avctx, AV_LOG_ERROR,
2620 "ignoring GOP_START_CODE after %X\n", last_code);
2621 if (avctx->err_recognition & AV_EF_EXPLODE)
2622 return AVERROR_INVALIDDATA;
2626 if (start_code >= SLICE_MIN_START_CODE &&
2627 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2628 if (s2->progressive_sequence && !s2->progressive_frame) {
2629 s2->progressive_frame = 1;
2630 av_log(s2->avctx, AV_LOG_ERROR,
2631 "interlaced frame in progressive sequence, ignoring\n");
2634 if (s2->picture_structure == 0 ||
2635 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2636 av_log(s2->avctx, AV_LOG_ERROR,
2637 "picture_structure %d invalid, ignoring\n",
2638 s2->picture_structure);
2639 s2->picture_structure = PICT_FRAME;
2642 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2643 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2645 if (s2->picture_structure == PICT_FRAME) {
2646 s2->first_field = 0;
2647 s2->v_edge_pos = 16 * s2->mb_height;
2649 s2->first_field ^= 1;
2650 s2->v_edge_pos = 8 * s2->mb_height;
2651 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2654 if (start_code >= SLICE_MIN_START_CODE &&
2655 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2656 const int field_pic = s2->picture_structure != PICT_FRAME;
2657 int mb_y = start_code - SLICE_MIN_START_CODE;
2658 last_code = SLICE_MIN_START_CODE;
2659 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2660 mb_y += (*buf_ptr&0xE0)<<2;
2663 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2666 if (buf_end - buf_ptr < 2) {
2667 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2668 return AVERROR_INVALIDDATA;
2671 if (mb_y >= s2->mb_height) {
2672 av_log(s2->avctx, AV_LOG_ERROR,
2673 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2674 return AVERROR_INVALIDDATA;
2677 if (!s2->last_picture_ptr) {
2678 /* Skip B-frames if we do not have reference frames and
2679 * GOP is not closed. */
2680 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2681 if (!s2->closed_gop) {
2683 av_log(s2->avctx, AV_LOG_DEBUG,
2684 "Skipping B slice due to open GOP\n");
2689 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2691 if (!s2->next_picture_ptr) {
2692 /* Skip P-frames if we do not have a reference frame or
2693 * we have an invalid header. */
2694 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2696 av_log(s2->avctx, AV_LOG_DEBUG,
2697 "Skipping P slice due to !sync\n");
2701 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2702 s2->pict_type == AV_PICTURE_TYPE_B) ||
2703 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2704 s2->pict_type != AV_PICTURE_TYPE_I) ||
2705 avctx->skip_frame >= AVDISCARD_ALL) {
2710 if (!s->mpeg_enc_ctx_allocated)
2713 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2714 if (mb_y < avctx->skip_top ||
2715 mb_y >= s2->mb_height - avctx->skip_bottom)
2719 if (!s2->pict_type) {
2720 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2721 if (avctx->err_recognition & AV_EF_EXPLODE)
2722 return AVERROR_INVALIDDATA;
2726 if (s->first_slice) {
2729 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2732 if (!s2->current_picture_ptr) {
2733 av_log(avctx, AV_LOG_ERROR,
2734 "current_picture not initialized\n");
2735 return AVERROR_INVALIDDATA;
2739 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2741 int threshold = (s2->mb_height * s->slice_count +
2742 s2->slice_context_count / 2) /
2743 s2->slice_context_count;
2744 av_assert0(avctx->thread_count > 1);
2745 if (threshold <= mb_y) {
2746 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2748 thread_context->start_mb_y = mb_y;
2749 thread_context->end_mb_y = s2->mb_height;
2750 if (s->slice_count) {
2751 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2752 ret = ff_update_duplicate_context(thread_context, s2);
2756 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2759 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2761 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2765 if (avctx->err_recognition & AV_EF_EXPLODE)
2767 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2768 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2769 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2770 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2772 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2773 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2774 ER_AC_END | ER_DC_END | ER_MV_END);
2783 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2784 int *got_output, AVPacket *avpkt)
2786 const uint8_t *buf = avpkt->data;
2788 int buf_size = avpkt->size;
2789 Mpeg1Context *s = avctx->priv_data;
2790 AVFrame *picture = data;
2791 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2793 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2794 /* special case for last picture */
2795 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2796 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2800 s2->next_picture_ptr = NULL;
2807 if (s2->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
2808 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2811 if (ff_combine_frame(&s2->parse_context, next,
2812 (const uint8_t **) &buf, &buf_size) < 0)
2816 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2817 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2818 || s2->codec_tag == AV_RL32("BW10")
2820 vcr2_init_sequence(avctx);
2824 if (avctx->extradata && !s->extradata_decoded) {
2825 ret = decode_chunks(avctx, picture, got_output,
2826 avctx->extradata, avctx->extradata_size);
2828 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2829 av_frame_unref(picture);
2832 s->extradata_decoded = 1;
2833 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2834 s2->current_picture_ptr = NULL;
2839 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2840 if (ret<0 || *got_output) {
2841 s2->current_picture_ptr = NULL;
2843 if (s2->timecode_frame_start != -1 && *got_output) {
2844 char tcbuf[AV_TIMECODE_STR_SIZE];
2845 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2846 AV_FRAME_DATA_GOP_TIMECODE,
2849 return AVERROR(ENOMEM);
2850 memcpy(tcside->data, &s2->timecode_frame_start, sizeof(int64_t));
2852 av_timecode_make_mpeg_tc_string(tcbuf, s2->timecode_frame_start);
2853 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2855 s2->timecode_frame_start = -1;
2862 static void flush(AVCodecContext *avctx)
2864 Mpeg1Context *s = avctx->priv_data;
2868 ff_mpeg_flush(avctx);
2871 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2873 Mpeg1Context *s = avctx->priv_data;
2875 if (s->mpeg_enc_ctx_allocated)
2876 ff_mpv_common_end(&s->mpeg_enc_ctx);
2877 av_buffer_unref(&s->a53_buf_ref);
2881 const AVCodec ff_mpeg1video_decoder = {
2882 .name = "mpeg1video",
2883 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2884 .type = AVMEDIA_TYPE_VIDEO,
2885 .id = AV_CODEC_ID_MPEG1VIDEO,
2886 .priv_data_size = sizeof(Mpeg1Context),
2887 .init = mpeg_decode_init,
2888 .close = mpeg_decode_end,
2889 .decode = mpeg_decode_frame,
2890 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2891 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2892 AV_CODEC_CAP_SLICE_THREADS,
2893 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2894 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2897 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context),
2898 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2899 #if CONFIG_MPEG1_NVDEC_HWACCEL
2900 HWACCEL_NVDEC(mpeg1),
2902 #if CONFIG_MPEG1_VDPAU_HWACCEL
2903 HWACCEL_VDPAU(mpeg1),
2905 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2906 HWACCEL_VIDEOTOOLBOX(mpeg1),
2908 #if CONFIG_MPEG1_XVMC_HWACCEL
2909 HWACCEL_XVMC(mpeg1),
2915 const AVCodec ff_mpeg2video_decoder = {
2916 .name = "mpeg2video",
2917 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2918 .type = AVMEDIA_TYPE_VIDEO,
2919 .id = AV_CODEC_ID_MPEG2VIDEO,
2920 .priv_data_size = sizeof(Mpeg1Context),
2921 .init = mpeg_decode_init,
2922 .close = mpeg_decode_end,
2923 .decode = mpeg_decode_frame,
2924 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2925 AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
2926 AV_CODEC_CAP_SLICE_THREADS,
2927 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2928 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2931 .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2932 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2933 #if CONFIG_MPEG2_DXVA2_HWACCEL
2934 HWACCEL_DXVA2(mpeg2),
2936 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2937 HWACCEL_D3D11VA(mpeg2),
2939 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2940 HWACCEL_D3D11VA2(mpeg2),
2942 #if CONFIG_MPEG2_NVDEC_HWACCEL
2943 HWACCEL_NVDEC(mpeg2),
2945 #if CONFIG_MPEG2_VAAPI_HWACCEL
2946 HWACCEL_VAAPI(mpeg2),
2948 #if CONFIG_MPEG2_VDPAU_HWACCEL
2949 HWACCEL_VDPAU(mpeg2),
2951 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2952 HWACCEL_VIDEOTOOLBOX(mpeg2),
2954 #if CONFIG_MPEG2_XVMC_HWACCEL
2955 HWACCEL_XVMC(mpeg2),
2962 const AVCodec ff_mpegvideo_decoder = {
2963 .name = "mpegvideo",
2964 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2965 .type = AVMEDIA_TYPE_VIDEO,
2966 .id = AV_CODEC_ID_MPEG2VIDEO,
2967 .priv_data_size = sizeof(Mpeg1Context),
2968 .init = mpeg_decode_init,
2969 .close = mpeg_decode_end,
2970 .decode = mpeg_decode_frame,
2971 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2972 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2973 FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2978 typedef struct IPUContext {
2982 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2985 static int ipu_decode_frame(AVCodecContext *avctx, void *data,
2986 int *got_frame, AVPacket *avpkt)
2988 IPUContext *s = avctx->priv_data;
2989 MpegEncContext *m = &s->m;
2990 GetBitContext *gb = &m->gb;
2991 AVFrame * const frame = data;
2994 ret = ff_get_buffer(avctx, frame, 0);
2998 ret = init_get_bits8(gb, avpkt->data, avpkt->size);
3002 s->flags = get_bits(gb, 8);
3003 m->intra_dc_precision = s->flags & 3;
3004 m->q_scale_type = !!(s->flags & 0x40);
3005 m->intra_vlc_format = !!(s->flags & 0x20);
3006 m->alternate_scan = !!(s->flags & 0x10);
3008 if (s->flags & 0x10) {
3009 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_alternate_vertical_scan);
3010 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_alternate_vertical_scan);
3012 ff_init_scantable(m->idsp.idct_permutation, &m->inter_scantable, ff_zigzag_direct);
3013 ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, ff_zigzag_direct);
3016 m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
3019 for (int y = 0; y < avctx->height; y += 16) {
3022 for (int x = 0; x < avctx->width; x += 16) {
3025 return AVERROR_INVALIDDATA;
3027 if (get_bits1(gb)) {
3031 return AVERROR_INVALIDDATA;
3039 m->qscale = mpeg_get_qscale(m);
3041 memset(s->block, 0, sizeof(s->block));
3043 for (int n = 0; n < 6; n++) {
3044 if (s->flags & 0x80) {
3045 ret = ff_mpeg1_decode_block_intra(&m->gb,
3047 m->intra_scantable.permutated,
3048 m->last_dc, s->block[n],
3051 m->block_last_index[n] = ret;
3053 ret = mpeg2_decode_block_intra(m, s->block[n], n);
3060 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
3061 frame->linesize[0], s->block[0]);
3062 m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
3063 frame->linesize[0], s->block[1]);
3064 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
3065 frame->linesize[0], s->block[2]);
3066 m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
3067 frame->linesize[0], s->block[3]);
3068 m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
3069 frame->linesize[1], s->block[4]);
3070 m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
3071 frame->linesize[2], s->block[5]);
3076 if (get_bits_left(gb) != 32)
3077 return AVERROR_INVALIDDATA;
3079 frame->pict_type = AV_PICTURE_TYPE_I;
3080 frame->key_frame = 1;
3086 static av_cold int ipu_decode_init(AVCodecContext *avctx)
3088 IPUContext *s = avctx->priv_data;
3089 MpegEncContext *m = &s->m;
3091 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3093 ff_mpv_decode_init(m, avctx);
3094 ff_mpv_idct_init(m);
3095 ff_mpeg12_common_init(m);
3096 ff_mpeg12_init_vlcs();
3098 for (int i = 0; i < 64; i++) {
3099 int j = m->idsp.idct_permutation[i];
3100 int v = ff_mpeg1_default_intra_matrix[i];
3101 m->intra_matrix[j] = v;
3102 m->chroma_intra_matrix[j] = v;
3105 for (int i = 0; i < 64; i++) {
3106 int j = m->idsp.idct_permutation[i];
3107 int v = ff_mpeg1_default_non_intra_matrix[i];
3108 m->inter_matrix[j] = v;
3109 m->chroma_inter_matrix[j] = v;
3115 static av_cold int ipu_decode_end(AVCodecContext *avctx)
3117 IPUContext *s = avctx->priv_data;
3119 ff_mpv_common_end(&s->m);
3124 const AVCodec ff_ipu_decoder = {
3126 .long_name = NULL_IF_CONFIG_SMALL("IPU Video"),
3127 .type = AVMEDIA_TYPE_VIDEO,
3128 .id = AV_CODEC_ID_IPU,
3129 .priv_data_size = sizeof(IPUContext),
3130 .init = ipu_decode_init,
3131 .decode = ipu_decode_frame,
3132 .close = ipu_decode_end,
3133 .capabilities = AV_CODEC_CAP_DR1,
3134 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,