3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #define UNCHECKED_BITSTREAM_READER 1
31 #include "libavutil/attributes.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/stereo3d.h"
37 #include "bytestream.h"
38 #include "error_resilience.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
48 #include "vdpau_compat.h"
49 #include "xvmc_internal.h"
51 typedef struct Mpeg1Context {
52 MpegEncContext mpeg_enc_ctx;
53 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
54 int repeat_field; /* true if we must repeat the field */
55 AVPanScan pan_scan; /* some temporary storage for the panscan */
63 AVRational save_aspect;
64 int save_width, save_height, save_progressive_seq;
65 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
66 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
69 int extradata_decoded;
72 #define MB_TYPE_ZERO_MV 0x20000000
74 static const uint32_t ptype2mb_type[7] = {
76 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
78 MB_TYPE_L0 | MB_TYPE_CBP,
79 MB_TYPE_QUANT | MB_TYPE_INTRA,
80 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
81 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
84 static const uint32_t btype2mb_type[11] = {
87 MB_TYPE_L1 | MB_TYPE_CBP,
89 MB_TYPE_L0 | MB_TYPE_CBP,
91 MB_TYPE_L0L1 | MB_TYPE_CBP,
92 MB_TYPE_QUANT | MB_TYPE_INTRA,
93 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
94 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
95 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
98 static const uint8_t non_linear_qscale[32] = {
99 0, 1, 2, 3, 4, 5, 6, 7,
100 8, 10, 12, 14, 16, 18, 20, 22,
101 24, 28, 32, 36, 40, 44, 48, 52,
102 56, 64, 72, 80, 88, 96, 104, 112,
105 /* as H.263, but only 17 codes */
106 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
108 int code, sign, val, shift;
110 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
116 sign = get_bits1(&s->gb);
120 val = (val - 1) << shift;
121 val |= get_bits(&s->gb, shift);
128 /* modulo decoding */
129 return sign_extend(val, 5 + shift);
132 #define check_scantable_index(ctx, x) \
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_intra(MpegEncContext *s,
142 int16_t *block, int n)
144 int level, dc, diff, i, j, run;
146 RLTable *rl = &ff_rl_mpeg1;
147 uint8_t *const scantable = s->intra_scantable.permutated;
148 const uint16_t *quant_matrix = s->intra_matrix;
149 const int qscale = s->qscale;
152 component = (n <= 3 ? 0 : n - 4 + 1);
153 diff = decode_dc(&s->gb, component);
155 return AVERROR_INVALIDDATA;
156 dc = s->last_dc[component];
158 s->last_dc[component] = dc;
159 block[0] = dc * quant_matrix[0];
160 ff_tlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
163 OPEN_READER(re, &s->gb);
164 UPDATE_CACHE(re, &s->gb);
165 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
168 /* now quantify & encode AC coefficients */
170 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
175 check_scantable_index(s, i);
177 level = (level * qscale * quant_matrix[j]) >> 4;
178 level = (level - 1) | 1;
179 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
180 SHOW_SBITS(re, &s->gb, 1);
181 SKIP_BITS(re, &s->gb, 1);
184 run = SHOW_UBITS(re, &s->gb, 6) + 1;
185 LAST_SKIP_BITS(re, &s->gb, 6);
186 UPDATE_CACHE(re, &s->gb);
187 level = SHOW_SBITS(re, &s->gb, 8);
188 SKIP_BITS(re, &s->gb, 8);
190 level = SHOW_UBITS(re, &s->gb, 8) - 256;
191 SKIP_BITS(re, &s->gb, 8);
192 } else if (level == 0) {
193 level = SHOW_UBITS(re, &s->gb, 8);
194 SKIP_BITS(re, &s->gb, 8);
197 check_scantable_index(s, i);
201 level = (level * qscale * quant_matrix[j]) >> 4;
202 level = (level - 1) | 1;
205 level = (level * qscale * quant_matrix[j]) >> 4;
206 level = (level - 1) | 1;
211 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
214 UPDATE_CACHE(re, &s->gb);
217 LAST_SKIP_BITS(re, &s->gb, 2);
218 CLOSE_READER(re, &s->gb);
220 s->block_last_index[n] = i;
224 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
226 return mpeg1_decode_block_intra(s, block, n);
229 static inline int mpeg1_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 uint16_t *quant_matrix = s->inter_matrix;
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 * quant_matrix[0]) >> 5;
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)
254 /* now quantify & encode AC coefficients */
256 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
261 check_scantable_index(s, i);
263 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
264 level = (level - 1) | 1;
265 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
266 SHOW_SBITS(re, &s->gb, 1);
267 SKIP_BITS(re, &s->gb, 1);
270 run = SHOW_UBITS(re, &s->gb, 6) + 1;
271 LAST_SKIP_BITS(re, &s->gb, 6);
272 UPDATE_CACHE(re, &s->gb);
273 level = SHOW_SBITS(re, &s->gb, 8);
274 SKIP_BITS(re, &s->gb, 8);
276 level = SHOW_UBITS(re, &s->gb, 8) - 256;
277 SKIP_BITS(re, &s->gb, 8);
278 } else if (level == 0) {
279 level = SHOW_UBITS(re, &s->gb, 8);
280 SKIP_BITS(re, &s->gb, 8);
283 check_scantable_index(s, i);
287 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
288 level = (level - 1) | 1;
291 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
292 level = (level - 1) | 1;
297 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
299 UPDATE_CACHE(re, &s->gb);
302 LAST_SKIP_BITS(re, &s->gb, 2);
303 CLOSE_READER(re, &s->gb);
305 s->block_last_index[n] = i;
310 * Note: this function can read out of range and crash for corrupt streams.
311 * Changing this would eat up any speed benefits it has.
312 * Do not use "fast" flag if you need the code to be robust.
314 static inline int mpeg1_fast_decode_block_inter(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 int qscale = s->qscale;
323 OPEN_READER(re, &s->gb);
325 // Special case for first coefficient, no need to add second VLC table.
326 UPDATE_CACHE(re, &s->gb);
327 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
328 level = (3 * qscale) >> 1;
329 level = (level - 1) | 1;
330 if (GET_CACHE(re, &s->gb) & 0x40000000)
334 SKIP_BITS(re, &s->gb, 2);
335 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
339 /* now quantify & encode AC coefficients */
341 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
346 check_scantable_index(s, i);
348 level = ((level * 2 + 1) * qscale) >> 1;
349 level = (level - 1) | 1;
350 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
351 SHOW_SBITS(re, &s->gb, 1);
352 SKIP_BITS(re, &s->gb, 1);
355 run = SHOW_UBITS(re, &s->gb, 6) + 1;
356 LAST_SKIP_BITS(re, &s->gb, 6);
357 UPDATE_CACHE(re, &s->gb);
358 level = SHOW_SBITS(re, &s->gb, 8);
359 SKIP_BITS(re, &s->gb, 8);
361 level = SHOW_UBITS(re, &s->gb, 8) - 256;
362 SKIP_BITS(re, &s->gb, 8);
363 } else if (level == 0) {
364 level = SHOW_UBITS(re, &s->gb, 8);
365 SKIP_BITS(re, &s->gb, 8);
368 check_scantable_index(s, i);
372 level = ((level * 2 + 1) * qscale) >> 1;
373 level = (level - 1) | 1;
376 level = ((level * 2 + 1) * qscale) >> 1;
377 level = (level - 1) | 1;
382 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
384 UPDATE_CACHE(re, &s->gb);
387 LAST_SKIP_BITS(re, &s->gb, 2);
388 CLOSE_READER(re, &s->gb);
390 s->block_last_index[n] = i;
394 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
395 int16_t *block, int n)
397 int level, i, j, run;
398 RLTable *rl = &ff_rl_mpeg1;
399 uint8_t *const scantable = s->intra_scantable.permutated;
400 const uint16_t *quant_matrix;
401 const int qscale = s->qscale;
407 OPEN_READER(re, &s->gb);
410 quant_matrix = s->inter_matrix;
412 quant_matrix = s->chroma_inter_matrix;
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 * quant_matrix[0]) >> 5;
418 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],
435 check_scantable_index(s, i);
437 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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);
450 check_scantable_index(s, i);
453 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
456 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
462 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
464 UPDATE_CACHE(re, &s->gb);
467 LAST_SKIP_BITS(re, &s->gb, 2);
468 CLOSE_READER(re, &s->gb);
470 block[63] ^= (mismatch & 1);
472 s->block_last_index[n] = i;
477 * Note: this function can read out of range and crash for corrupt streams.
478 * Changing this would eat up any speed benefits it has.
479 * Do not use "fast" flag if you need the code to be robust.
481 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
482 int16_t *block, int n)
484 int level, i, j, run;
485 RLTable *rl = &ff_rl_mpeg1;
486 uint8_t *const scantable = s->intra_scantable.permutated;
487 const int qscale = s->qscale;
488 OPEN_READER(re, &s->gb);
491 // special case for first coefficient, no need to add second VLC table
492 UPDATE_CACHE(re, &s->gb);
493 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
494 level = (3 * qscale) >> 1;
495 if (GET_CACHE(re, &s->gb) & 0x40000000)
499 SKIP_BITS(re, &s->gb, 2);
500 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
504 /* now quantify & encode AC coefficients */
506 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
511 level = ((level * 2 + 1) * qscale) >> 1;
512 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
513 SHOW_SBITS(re, &s->gb, 1);
514 SKIP_BITS(re, &s->gb, 1);
517 run = SHOW_UBITS(re, &s->gb, 6) + 1;
518 LAST_SKIP_BITS(re, &s->gb, 6);
519 UPDATE_CACHE(re, &s->gb);
520 level = SHOW_SBITS(re, &s->gb, 12);
521 SKIP_BITS(re, &s->gb, 12);
526 level = ((-level * 2 + 1) * qscale) >> 1;
529 level = ((level * 2 + 1) * qscale) >> 1;
534 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF || i > 63)
537 UPDATE_CACHE(re, &s->gb);
540 LAST_SKIP_BITS(re, &s->gb, 2);
541 CLOSE_READER(re, &s->gb);
542 s->block_last_index[n] = i;
546 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
547 int16_t *block, int n)
549 int level, dc, diff, i, j, run;
552 uint8_t *const scantable = s->intra_scantable.permutated;
553 const uint16_t *quant_matrix;
554 const int qscale = s->qscale;
559 quant_matrix = s->intra_matrix;
562 quant_matrix = s->chroma_intra_matrix;
563 component = (n & 1) + 1;
565 diff = decode_dc(&s->gb, component);
567 return AVERROR_INVALIDDATA;
568 dc = s->last_dc[component];
570 s->last_dc[component] = dc;
571 block[0] = dc << (3 - s->intra_dc_precision);
572 ff_tlog(s->avctx, "dc=%d\n", block[0]);
573 mismatch = block[0] ^ 1;
575 if (s->intra_vlc_format)
581 OPEN_READER(re, &s->gb);
582 /* now quantify & encode AC coefficients */
584 UPDATE_CACHE(re, &s->gb);
585 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
590 } else if (level != 0) {
592 check_scantable_index(s, i);
594 level = (level * qscale * quant_matrix[j]) >> 4;
595 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
596 SHOW_SBITS(re, &s->gb, 1);
597 LAST_SKIP_BITS(re, &s->gb, 1);
600 run = SHOW_UBITS(re, &s->gb, 6) + 1;
601 LAST_SKIP_BITS(re, &s->gb, 6);
602 UPDATE_CACHE(re, &s->gb);
603 level = SHOW_SBITS(re, &s->gb, 12);
604 SKIP_BITS(re, &s->gb, 12);
606 check_scantable_index(s, i);
609 level = (-level * qscale * quant_matrix[j]) >> 4;
612 level = (level * qscale * quant_matrix[j]) >> 4;
619 CLOSE_READER(re, &s->gb);
621 block[63] ^= mismatch & 1;
623 s->block_last_index[n] = i;
628 * Note: this function can read out of range and crash for corrupt streams.
629 * Changing this would eat up any speed benefits it has.
630 * Do not use "fast" flag if you need the code to be robust.
632 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
633 int16_t *block, int n)
635 int level, dc, diff, i, j, run;
638 uint8_t *const scantable = s->intra_scantable.permutated;
639 const uint16_t *quant_matrix;
640 const int qscale = s->qscale;
644 quant_matrix = s->intra_matrix;
647 quant_matrix = s->chroma_intra_matrix;
648 component = (n & 1) + 1;
650 diff = decode_dc(&s->gb, component);
652 return AVERROR_INVALIDDATA;
653 dc = s->last_dc[component];
655 s->last_dc[component] = dc;
656 block[0] = dc << (3 - s->intra_dc_precision);
658 if (s->intra_vlc_format)
664 OPEN_READER(re, &s->gb);
665 /* now quantify & encode AC coefficients */
667 UPDATE_CACHE(re, &s->gb);
668 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
671 if (level >= 64 || i > 63) {
673 } else if (level != 0) {
676 level = (level * qscale * quant_matrix[j]) >> 4;
677 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
678 SHOW_SBITS(re, &s->gb, 1);
679 LAST_SKIP_BITS(re, &s->gb, 1);
682 run = SHOW_UBITS(re, &s->gb, 6) + 1;
683 LAST_SKIP_BITS(re, &s->gb, 6);
684 UPDATE_CACHE(re, &s->gb);
685 level = SHOW_SBITS(re, &s->gb, 12);
686 SKIP_BITS(re, &s->gb, 12);
690 level = (-level * qscale * quant_matrix[j]) >> 4;
693 level = (level * qscale * quant_matrix[j]) >> 4;
699 CLOSE_READER(re, &s->gb);
702 s->block_last_index[n] = i;
706 /******************************************/
709 static inline int get_dmv(MpegEncContext *s)
711 if (get_bits1(&s->gb))
712 return 1 - (get_bits1(&s->gb) << 1);
717 static inline int get_qscale(MpegEncContext *s)
719 int qscale = get_bits(&s->gb, 5);
721 return non_linear_qscale[qscale];
727 /* motion type (for MPEG-2) */
733 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
735 int i, j, k, cbp, val, mb_type, motion_type;
736 const int mb_block_count = 4 + (1 << s->chroma_format);
739 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
741 av_assert2(s->mb_skipped == 0);
743 if (s->mb_skip_run-- != 0) {
744 if (s->pict_type == AV_PICTURE_TYPE_P) {
746 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
747 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
752 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
754 // FIXME not sure if this is allowed in MPEG at all
755 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
756 if (IS_INTRA(mb_type)) {
757 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
758 return AVERROR_INVALIDDATA;
760 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
761 mb_type | MB_TYPE_SKIP;
763 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
770 switch (s->pict_type) {
772 case AV_PICTURE_TYPE_I:
773 if (get_bits1(&s->gb) == 0) {
774 if (get_bits1(&s->gb) == 0) {
775 av_log(s->avctx, AV_LOG_ERROR,
776 "invalid mb type in I Frame at %d %d\n",
778 return AVERROR_INVALIDDATA;
780 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
782 mb_type = MB_TYPE_INTRA;
785 case AV_PICTURE_TYPE_P:
786 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
788 av_log(s->avctx, AV_LOG_ERROR,
789 "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
790 return AVERROR_INVALIDDATA;
792 mb_type = ptype2mb_type[mb_type];
794 case AV_PICTURE_TYPE_B:
795 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
797 av_log(s->avctx, AV_LOG_ERROR,
798 "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
799 return AVERROR_INVALIDDATA;
801 mb_type = btype2mb_type[mb_type];
804 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
805 // motion_type = 0; /* avoid warning */
806 if (IS_INTRA(mb_type)) {
807 s->bdsp.clear_blocks(s->block[0]);
809 if (!s->chroma_y_shift)
810 s->bdsp.clear_blocks(s->block[6]);
812 /* compute DCT type */
813 // FIXME: add an interlaced_dct coded var?
814 if (s->picture_structure == PICT_FRAME &&
815 !s->frame_pred_frame_dct)
816 s->interlaced_dct = get_bits1(&s->gb);
818 if (IS_QUANT(mb_type))
819 s->qscale = get_qscale(s);
821 if (s->concealment_motion_vectors) {
822 /* just parse them */
823 if (s->picture_structure != PICT_FRAME)
824 skip_bits1(&s->gb); /* field select */
827 s->last_mv[0][0][0] =
828 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
829 s->last_mv[0][0][0]);
831 s->last_mv[0][0][1] =
832 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
833 s->last_mv[0][0][1]);
835 check_marker(&s->gb, "after concealment_motion_vectors");
837 /* reset mv prediction */
838 memset(s->last_mv, 0, sizeof(s->last_mv));
841 // if 1, we memcpy blocks in xvmcvideo
842 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
843 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
845 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
846 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
847 for (i = 0; i < 6; i++)
848 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
850 for (i = 0; i < mb_block_count; i++)
851 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
855 for (i = 0; i < 6; i++)
856 if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0)
860 if (mb_type & MB_TYPE_ZERO_MV) {
861 av_assert2(mb_type & MB_TYPE_CBP);
863 s->mv_dir = MV_DIR_FORWARD;
864 if (s->picture_structure == PICT_FRAME) {
865 if (s->picture_structure == PICT_FRAME
866 && !s->frame_pred_frame_dct)
867 s->interlaced_dct = get_bits1(&s->gb);
868 s->mv_type = MV_TYPE_16X16;
870 s->mv_type = MV_TYPE_FIELD;
871 mb_type |= MB_TYPE_INTERLACED;
872 s->field_select[0][0] = s->picture_structure - 1;
875 if (IS_QUANT(mb_type))
876 s->qscale = get_qscale(s);
878 s->last_mv[0][0][0] = 0;
879 s->last_mv[0][0][1] = 0;
880 s->last_mv[0][1][0] = 0;
881 s->last_mv[0][1][1] = 0;
885 av_assert2(mb_type & MB_TYPE_L0L1);
886 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
887 /* get additional motion vector type */
888 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
889 motion_type = MT_FRAME;
891 motion_type = get_bits(&s->gb, 2);
892 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
893 s->interlaced_dct = get_bits1(&s->gb);
896 if (IS_QUANT(mb_type))
897 s->qscale = get_qscale(s);
900 s->mv_dir = (mb_type >> 13) & 3;
901 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
902 switch (motion_type) {
903 case MT_FRAME: /* or MT_16X8 */
904 if (s->picture_structure == PICT_FRAME) {
905 mb_type |= MB_TYPE_16x16;
906 s->mv_type = MV_TYPE_16X16;
907 for (i = 0; i < 2; i++) {
908 if (USES_LIST(mb_type, i)) {
911 s->last_mv[i][0][0] =
912 s->last_mv[i][1][0] =
913 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
914 s->last_mv[i][0][0]);
916 s->last_mv[i][0][1] =
917 s->last_mv[i][1][1] =
918 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
919 s->last_mv[i][0][1]);
920 /* full_pel: only for MPEG-1 */
921 if (s->full_pel[i]) {
922 s->mv[i][0][0] <<= 1;
923 s->mv[i][0][1] <<= 1;
928 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
929 s->mv_type = MV_TYPE_16X8;
930 for (i = 0; i < 2; i++) {
931 if (USES_LIST(mb_type, i)) {
933 for (j = 0; j < 2; j++) {
934 s->field_select[i][j] = get_bits1(&s->gb);
935 for (k = 0; k < 2; k++) {
936 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
937 s->last_mv[i][j][k]);
938 s->last_mv[i][j][k] = val;
939 s->mv[i][j][k] = val;
947 s->mv_type = MV_TYPE_FIELD;
948 if (s->picture_structure == PICT_FRAME) {
949 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
950 for (i = 0; i < 2; i++) {
951 if (USES_LIST(mb_type, i)) {
952 for (j = 0; j < 2; j++) {
953 s->field_select[i][j] = get_bits1(&s->gb);
954 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
955 s->last_mv[i][j][0]);
956 s->last_mv[i][j][0] = val;
957 s->mv[i][j][0] = val;
958 ff_tlog(s->avctx, "fmx=%d\n", val);
959 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
960 s->last_mv[i][j][1] >> 1);
961 s->last_mv[i][j][1] = 2 * val;
962 s->mv[i][j][1] = val;
963 ff_tlog(s->avctx, "fmy=%d\n", val);
968 av_assert0(!s->progressive_sequence);
969 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
970 for (i = 0; i < 2; i++) {
971 if (USES_LIST(mb_type, i)) {
972 s->field_select[i][0] = get_bits1(&s->gb);
973 for (k = 0; k < 2; k++) {
974 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
975 s->last_mv[i][0][k]);
976 s->last_mv[i][0][k] = val;
977 s->last_mv[i][1][k] = val;
978 s->mv[i][0][k] = val;
985 if (s->progressive_sequence){
986 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
987 return AVERROR_INVALIDDATA;
989 s->mv_type = MV_TYPE_DMV;
990 for (i = 0; i < 2; i++) {
991 if (USES_LIST(mb_type, i)) {
992 int dmx, dmy, mx, my, m;
993 const int my_shift = s->picture_structure == PICT_FRAME;
995 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
996 s->last_mv[i][0][0]);
997 s->last_mv[i][0][0] = mx;
998 s->last_mv[i][1][0] = mx;
1000 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1001 s->last_mv[i][0][1] >> my_shift);
1005 s->last_mv[i][0][1] = my << my_shift;
1006 s->last_mv[i][1][1] = my << my_shift;
1008 s->mv[i][0][0] = mx;
1009 s->mv[i][0][1] = my;
1010 s->mv[i][1][0] = mx; // not used
1011 s->mv[i][1][1] = my; // not used
1013 if (s->picture_structure == PICT_FRAME) {
1014 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1016 // m = 1 + 2 * s->top_field_first;
1017 m = s->top_field_first ? 1 : 3;
1019 /* top -> top pred */
1020 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1021 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1023 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1024 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1026 mb_type |= MB_TYPE_16x16;
1028 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1029 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1030 if (s->picture_structure == PICT_TOP_FIELD)
1039 av_log(s->avctx, AV_LOG_ERROR,
1040 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1041 return AVERROR_INVALIDDATA;
1046 if (HAS_CBP(mb_type)) {
1047 s->bdsp.clear_blocks(s->block[0]);
1049 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1050 if (mb_block_count > 6) {
1051 cbp <<= mb_block_count - 6;
1052 cbp |= get_bits(&s->gb, mb_block_count - 6);
1053 s->bdsp.clear_blocks(s->block[6]);
1056 av_log(s->avctx, AV_LOG_ERROR,
1057 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1058 return AVERROR_INVALIDDATA;
1061 // if 1, we memcpy blocks in xvmcvideo
1062 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1063 ff_xvmc_pack_pblocks(s, cbp);
1065 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1066 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
1067 for (i = 0; i < 6; i++) {
1069 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1071 s->block_last_index[i] = -1;
1075 cbp <<= 12 - mb_block_count;
1077 for (i = 0; i < mb_block_count; i++) {
1078 if (cbp & (1 << 11)) {
1079 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1082 s->block_last_index[i] = -1;
1088 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
1089 for (i = 0; i < 6; i++) {
1091 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1093 s->block_last_index[i] = -1;
1097 for (i = 0; i < 6; i++) {
1099 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1102 s->block_last_index[i] = -1;
1109 for (i = 0; i < 12; i++)
1110 s->block_last_index[i] = -1;
1114 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1119 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1121 Mpeg1Context *s = avctx->priv_data;
1122 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1124 ff_mpv_decode_defaults(s2);
1126 if ( avctx->codec_tag != AV_RL32("VCR2")
1127 && avctx->codec_tag != AV_RL32("BW10"))
1128 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
1129 ff_mpv_decode_init(s2, avctx);
1131 s->mpeg_enc_ctx.avctx = avctx;
1133 /* we need some permutation to store matrices,
1134 * until the decoder sets the real permutation. */
1135 ff_mpv_idct_init(s2);
1136 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1137 ff_mpeg12_init_vlcs();
1139 s->mpeg_enc_ctx_allocated = 0;
1140 s->mpeg_enc_ctx.picture_number = 0;
1141 s->repeat_field = 0;
1142 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1143 avctx->color_range = AVCOL_RANGE_MPEG;
1147 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1148 const AVCodecContext *avctx_from)
1150 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1151 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1154 if (avctx == avctx_from ||
1155 !ctx_from->mpeg_enc_ctx_allocated ||
1156 !s1->context_initialized)
1159 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1163 if (!ctx->mpeg_enc_ctx_allocated)
1164 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1166 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1167 s->picture_number++;
1172 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1173 const uint8_t *new_perm)
1175 uint16_t temp_matrix[64];
1178 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1180 for (i = 0; i < 64; i++)
1181 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1184 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1185 #if CONFIG_MPEG1_XVMC_HWACCEL
1188 #if CONFIG_MPEG1_VDPAU_HWACCEL
1189 AV_PIX_FMT_VDPAU_MPEG1,
1196 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1197 #if CONFIG_MPEG2_XVMC_HWACCEL
1200 #if CONFIG_MPEG2_VDPAU_HWACCEL
1201 AV_PIX_FMT_VDPAU_MPEG2,
1204 #if CONFIG_MPEG2_DXVA2_HWACCEL
1205 AV_PIX_FMT_DXVA2_VLD,
1207 #if CONFIG_MPEG2_D3D11VA_HWACCEL
1208 AV_PIX_FMT_D3D11VA_VLD,
1210 #if CONFIG_MPEG2_VAAPI_HWACCEL
1211 AV_PIX_FMT_VAAPI_VLD,
1217 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1222 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1227 static inline int uses_vdpau(AVCodecContext *avctx) {
1228 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1231 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1233 Mpeg1Context *s1 = avctx->priv_data;
1234 MpegEncContext *s = &s1->mpeg_enc_ctx;
1235 const enum AVPixelFormat *pix_fmts;
1237 if (CONFIG_GRAY && (avctx->flags & CODEC_FLAG_GRAY))
1238 return AV_PIX_FMT_GRAY8;
1240 if (s->chroma_format < 2)
1241 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1242 mpeg1_hwaccel_pixfmt_list_420 :
1243 mpeg2_hwaccel_pixfmt_list_420;
1244 else if (s->chroma_format == 2)
1245 pix_fmts = mpeg12_pixfmt_list_422;
1247 pix_fmts = mpeg12_pixfmt_list_444;
1249 return ff_thread_get_format(avctx, pix_fmts);
1252 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1254 // until then pix_fmt may be changed right after codec init
1255 if (avctx->hwaccel || uses_vdpau(avctx))
1256 if (avctx->idct_algo == FF_IDCT_AUTO)
1257 avctx->idct_algo = FF_IDCT_SIMPLE;
1259 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1260 Mpeg1Context *s1 = avctx->priv_data;
1261 MpegEncContext *s = &s1->mpeg_enc_ctx;
1263 s->pack_pblocks = 1;
1265 avctx->xvmc_acceleration = 2;
1266 #endif /* FF_API_XVMC */
1270 /* Call this function when we know all parameters.
1271 * It may be called in different places for MPEG-1 and MPEG-2. */
1272 static int mpeg_decode_postinit(AVCodecContext *avctx)
1274 Mpeg1Context *s1 = avctx->priv_data;
1275 MpegEncContext *s = &s1->mpeg_enc_ctx;
1276 uint8_t old_permutation[64];
1279 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1281 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1284 if (s->aspect_ratio_info > 1) {
1286 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1287 (AVRational) { s1->pan_scan.width,
1288 s1->pan_scan.height }),
1289 (AVRational) { s->width, s->height });
1291 /* We ignore the spec here and guess a bit as reality does not
1292 * match the spec, see for example res_change_ffmpeg_aspect.ts
1293 * and sequence-display-aspect.mpg.
1294 * issue1613, 621, 562 */
1295 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1296 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1297 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1298 s->avctx->sample_aspect_ratio =
1299 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1300 (AVRational) { s->width, s->height });
1302 s->avctx->sample_aspect_ratio =
1303 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1304 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1305 // issue1613 4/3 16/9 -> 16/9
1306 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1307 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1308 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1309 ff_dlog(avctx, "aspect A %d/%d\n",
1310 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1311 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1312 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1313 s->avctx->sample_aspect_ratio.den);
1316 s->avctx->sample_aspect_ratio =
1317 ff_mpeg2_aspect[s->aspect_ratio_info];
1321 if (av_image_check_sar(s->width, s->height,
1322 avctx->sample_aspect_ratio) < 0) {
1323 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1324 avctx->sample_aspect_ratio.num,
1325 avctx->sample_aspect_ratio.den);
1326 avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1329 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1330 avctx->coded_width != s->width ||
1331 avctx->coded_height != s->height ||
1332 s1->save_width != s->width ||
1333 s1->save_height != s->height ||
1334 av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
1335 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
1337 if (s1->mpeg_enc_ctx_allocated) {
1338 ParseContext pc = s->parse_context;
1339 s->parse_context.buffer = 0;
1340 ff_mpv_common_end(s);
1341 s->parse_context = pc;
1342 s1->mpeg_enc_ctx_allocated = 0;
1345 ret = ff_set_dimensions(avctx, s->width, s->height);
1349 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1350 avctx->rc_max_rate = s->bit_rate;
1351 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1352 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1353 avctx->bit_rate = s->bit_rate;
1355 s1->save_aspect = s->avctx->sample_aspect_ratio;
1356 s1->save_width = s->width;
1357 s1->save_height = s->height;
1358 s1->save_progressive_seq = s->progressive_sequence;
1360 /* low_delay may be forced, in this case we will have B-frames
1361 * that behave like P-frames. */
1362 avctx->has_b_frames = !s->low_delay;
1364 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1366 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1367 avctx->ticks_per_frame = 1;
1369 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1372 av_reduce(&s->avctx->framerate.num,
1373 &s->avctx->framerate.den,
1374 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
1375 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1377 avctx->ticks_per_frame = 2;
1379 switch (s->chroma_format) {
1380 case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
1382 case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
1386 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1387 setup_hwaccel_for_pixfmt(avctx);
1389 /* Quantization matrices may need reordering
1390 * if DCT permutation is changed. */
1391 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1393 ff_mpv_idct_init(s);
1394 if ((ret = ff_mpv_common_init(s)) < 0)
1397 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1398 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1399 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1400 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1402 s1->mpeg_enc_ctx_allocated = 1;
1407 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1410 Mpeg1Context *s1 = avctx->priv_data;
1411 MpegEncContext *s = &s1->mpeg_enc_ctx;
1412 int ref, f_code, vbv_delay;
1414 init_get_bits(&s->gb, buf, buf_size * 8);
1416 ref = get_bits(&s->gb, 10); /* temporal ref */
1417 s->pict_type = get_bits(&s->gb, 3);
1418 if (s->pict_type == 0 || s->pict_type > 3)
1419 return AVERROR_INVALIDDATA;
1421 vbv_delay = get_bits(&s->gb, 16);
1422 s->vbv_delay = vbv_delay;
1423 if (s->pict_type == AV_PICTURE_TYPE_P ||
1424 s->pict_type == AV_PICTURE_TYPE_B) {
1425 s->full_pel[0] = get_bits1(&s->gb);
1426 f_code = get_bits(&s->gb, 3);
1427 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1428 return AVERROR_INVALIDDATA;
1430 s->mpeg_f_code[0][0] = f_code;
1431 s->mpeg_f_code[0][1] = f_code;
1433 if (s->pict_type == AV_PICTURE_TYPE_B) {
1434 s->full_pel[1] = get_bits1(&s->gb);
1435 f_code = get_bits(&s->gb, 3);
1436 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1437 return AVERROR_INVALIDDATA;
1439 s->mpeg_f_code[1][0] = f_code;
1440 s->mpeg_f_code[1][1] = f_code;
1442 s->current_picture.f->pict_type = s->pict_type;
1443 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1445 if (avctx->debug & FF_DEBUG_PICT_INFO)
1446 av_log(avctx, AV_LOG_DEBUG,
1447 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1454 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1456 MpegEncContext *s = &s1->mpeg_enc_ctx;
1457 int horiz_size_ext, vert_size_ext;
1460 skip_bits(&s->gb, 1); /* profile and level esc*/
1461 s->avctx->profile = get_bits(&s->gb, 3);
1462 s->avctx->level = get_bits(&s->gb, 4);
1463 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1464 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1465 horiz_size_ext = get_bits(&s->gb, 2);
1466 vert_size_ext = get_bits(&s->gb, 2);
1467 s->width |= (horiz_size_ext << 12);
1468 s->height |= (vert_size_ext << 12);
1469 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1470 s->bit_rate += (bit_rate_ext << 18) * 400;
1471 check_marker(&s->gb, "after bit rate extension");
1472 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1474 s->low_delay = get_bits1(&s->gb);
1475 if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
1478 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1479 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1481 ff_dlog(s->avctx, "sequence extension\n");
1482 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1484 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1485 av_log(s->avctx, AV_LOG_DEBUG,
1486 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1487 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1488 s->avctx->rc_buffer_size, s->bit_rate);
1491 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1493 MpegEncContext *s = &s1->mpeg_enc_ctx;
1494 int color_description, w, h;
1496 skip_bits(&s->gb, 3); /* video format */
1497 color_description = get_bits1(&s->gb);
1498 if (color_description) {
1499 s->avctx->color_primaries = get_bits(&s->gb, 8);
1500 s->avctx->color_trc = get_bits(&s->gb, 8);
1501 s->avctx->colorspace = get_bits(&s->gb, 8);
1503 w = get_bits(&s->gb, 14);
1504 skip_bits(&s->gb, 1); // marker
1505 h = get_bits(&s->gb, 14);
1506 // remaining 3 bits are zero padding
1508 s1->pan_scan.width = 16 * w;
1509 s1->pan_scan.height = 16 * h;
1511 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1512 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1515 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1517 MpegEncContext *s = &s1->mpeg_enc_ctx;
1521 if (s->progressive_sequence) {
1522 if (s->repeat_first_field) {
1524 if (s->top_field_first)
1528 if (s->picture_structure == PICT_FRAME) {
1530 if (s->repeat_first_field)
1534 for (i = 0; i < nofco; i++) {
1535 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1536 skip_bits(&s->gb, 1); // marker
1537 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1538 skip_bits(&s->gb, 1); // marker
1541 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1542 av_log(s->avctx, AV_LOG_DEBUG,
1543 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1544 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1545 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1546 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1549 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1550 uint16_t matrix1[64], int intra)
1554 for (i = 0; i < 64; i++) {
1555 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1556 int v = get_bits(&s->gb, 8);
1558 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1559 return AVERROR_INVALIDDATA;
1561 if (intra && i == 0 && v != 8) {
1562 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1563 v = 8; // needed by pink.mpg / issue1046
1572 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1574 ff_dlog(s->avctx, "matrix extension\n");
1576 if (get_bits1(&s->gb))
1577 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1578 if (get_bits1(&s->gb))
1579 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1580 if (get_bits1(&s->gb))
1581 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1582 if (get_bits1(&s->gb))
1583 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1586 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1588 MpegEncContext *s = &s1->mpeg_enc_ctx;
1590 s->full_pel[0] = s->full_pel[1] = 0;
1591 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1592 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1593 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1594 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1595 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1596 av_log(s->avctx, AV_LOG_ERROR,
1597 "Missing picture start code, guessing missing values\n");
1598 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1599 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1600 s->pict_type = AV_PICTURE_TYPE_I;
1602 s->pict_type = AV_PICTURE_TYPE_P;
1604 s->pict_type = AV_PICTURE_TYPE_B;
1605 s->current_picture.f->pict_type = s->pict_type;
1606 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1608 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1609 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1610 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1611 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1613 s->intra_dc_precision = get_bits(&s->gb, 2);
1614 s->picture_structure = get_bits(&s->gb, 2);
1615 s->top_field_first = get_bits1(&s->gb);
1616 s->frame_pred_frame_dct = get_bits1(&s->gb);
1617 s->concealment_motion_vectors = get_bits1(&s->gb);
1618 s->q_scale_type = get_bits1(&s->gb);
1619 s->intra_vlc_format = get_bits1(&s->gb);
1620 s->alternate_scan = get_bits1(&s->gb);
1621 s->repeat_first_field = get_bits1(&s->gb);
1622 s->chroma_420_type = get_bits1(&s->gb);
1623 s->progressive_frame = get_bits1(&s->gb);
1625 if (s->alternate_scan) {
1626 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1627 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1629 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1630 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1633 /* composite display not parsed */
1634 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1635 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1636 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1637 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1638 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1639 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1640 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1641 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1642 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1645 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1647 AVCodecContext *avctx = s->avctx;
1648 Mpeg1Context *s1 = (Mpeg1Context *) s;
1651 /* start frame decoding */
1652 if (s->first_field || s->picture_structure == PICT_FRAME) {
1653 AVFrameSideData *pan_scan;
1655 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1658 ff_mpeg_er_frame_start(s);
1660 /* first check if we must repeat the frame */
1661 s->current_picture_ptr->f->repeat_pict = 0;
1662 if (s->repeat_first_field) {
1663 if (s->progressive_sequence) {
1664 if (s->top_field_first)
1665 s->current_picture_ptr->f->repeat_pict = 4;
1667 s->current_picture_ptr->f->repeat_pict = 2;
1668 } else if (s->progressive_frame) {
1669 s->current_picture_ptr->f->repeat_pict = 1;
1673 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1674 AV_FRAME_DATA_PANSCAN,
1675 sizeof(s1->pan_scan));
1677 return AVERROR(ENOMEM);
1678 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1680 if (s1->a53_caption) {
1681 AVFrameSideData *sd = av_frame_new_side_data(
1682 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1683 s1->a53_caption_size);
1685 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1686 av_freep(&s1->a53_caption);
1689 if (s1->has_stereo3d) {
1690 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1692 return AVERROR(ENOMEM);
1694 *stereo = s1->stereo3d;
1695 s1->has_stereo3d = 0;
1699 AVFrameSideData *sd =
1700 av_frame_new_side_data(s->current_picture_ptr->f,
1701 AV_FRAME_DATA_AFD, 1);
1703 return AVERROR(ENOMEM);
1705 *sd->data = s1->afd;
1709 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1710 ff_thread_finish_setup(avctx);
1711 } else { // second field
1714 if (!s->current_picture_ptr) {
1715 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1716 return AVERROR_INVALIDDATA;
1719 if (s->avctx->hwaccel &&
1720 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1721 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1722 av_log(avctx, AV_LOG_ERROR,
1723 "hardware accelerator failed to decode first field\n");
1726 for (i = 0; i < 4; i++) {
1727 s->current_picture.f->data[i] = s->current_picture_ptr->f->data[i];
1728 if (s->picture_structure == PICT_BOTTOM_FIELD)
1729 s->current_picture.f->data[i] +=
1730 s->current_picture_ptr->f->linesize[i];
1734 if (avctx->hwaccel) {
1735 if ((ret = avctx->hwaccel->start_frame(avctx, buf, buf_size)) < 0)
1742 #define DECODE_SLICE_ERROR -1
1743 #define DECODE_SLICE_OK 0
1747 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1748 * @return DECODE_SLICE_ERROR if the slice is damaged,
1749 * DECODE_SLICE_OK if this slice is OK
1751 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1752 const uint8_t **buf, int buf_size)
1754 AVCodecContext *avctx = s->avctx;
1755 const int lowres = s->avctx->lowres;
1756 const int field_pic = s->picture_structure != PICT_FRAME;
1760 s->resync_mb_y = -1;
1762 av_assert0(mb_y < s->mb_height);
1764 init_get_bits(&s->gb, *buf, buf_size * 8);
1765 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1766 skip_bits(&s->gb, 3);
1768 ff_mpeg1_clean_buffers(s);
1769 s->interlaced_dct = 0;
1771 s->qscale = get_qscale(s);
1773 if (s->qscale == 0) {
1774 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1775 return AVERROR_INVALIDDATA;
1778 /* extra slice info */
1779 if (skip_1stop_8data_bits(&s->gb) < 0)
1780 return AVERROR_INVALIDDATA;
1784 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1787 while (get_bits_left(&s->gb) > 0) {
1788 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1789 MBINCR_VLC_BITS, 2);
1791 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1792 return AVERROR_INVALIDDATA;
1797 /* otherwise, stuffing, nothing to do */
1805 if (s->mb_x >= (unsigned) s->mb_width) {
1806 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1807 return AVERROR_INVALIDDATA;
1810 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1811 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1812 int start_code = -1;
1813 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1814 if (buf_end < *buf + buf_size)
1817 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1818 return DECODE_SLICE_ERROR;
1820 return DECODE_SLICE_OK;
1823 s->resync_mb_x = s->mb_x;
1824 s->resync_mb_y = s->mb_y = mb_y;
1826 ff_init_block_index(s);
1828 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1829 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1830 av_log(s->avctx, AV_LOG_DEBUG,
1831 "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",
1833 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1834 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1835 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1836 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1837 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1838 s->progressive_sequence ? "ps" : "",
1839 s->progressive_frame ? "pf" : "",
1840 s->alternate_scan ? "alt" : "",
1841 s->top_field_first ? "top" : "",
1842 s->intra_dc_precision, s->picture_structure,
1843 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1844 s->q_scale_type, s->intra_vlc_format,
1845 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1850 // If 1, we memcpy blocks in xvmcvideo.
1851 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1852 ff_xvmc_init_block(s); // set s->block
1854 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1857 // Note motion_val is normally NULL unless we want to extract the MVs.
1858 if (s->current_picture.motion_val[0] && !s->encoding) {
1859 const int wrap = s->b8_stride;
1860 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1861 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1862 int motion_x, motion_y, dir, i;
1864 for (i = 0; i < 2; i++) {
1865 for (dir = 0; dir < 2; dir++) {
1867 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1868 motion_x = motion_y = 0;
1869 } else if (s->mv_type == MV_TYPE_16X16 ||
1870 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1871 motion_x = s->mv[dir][0][0];
1872 motion_y = s->mv[dir][0][1];
1873 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1874 motion_x = s->mv[dir][i][0];
1875 motion_y = s->mv[dir][i][1];
1878 s->current_picture.motion_val[dir][xy][0] = motion_x;
1879 s->current_picture.motion_val[dir][xy][1] = motion_y;
1880 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1881 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1882 s->current_picture.ref_index [dir][b8_xy] =
1883 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1884 av_assert2(s->field_select[dir][i] == 0 ||
1885 s->field_select[dir][i] == 1);
1892 s->dest[0] += 16 >> lowres;
1893 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1894 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1896 ff_mpv_decode_mb(s, s->block);
1898 if (++s->mb_x >= s->mb_width) {
1899 const int mb_size = 16 >> s->avctx->lowres;
1901 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1902 ff_mpv_report_decode_progress(s);
1905 s->mb_y += 1 << field_pic;
1907 if (s->mb_y >= s->mb_height) {
1908 int left = get_bits_left(&s->gb);
1909 int is_d10 = s->chroma_format == 2 &&
1910 s->pict_type == AV_PICTURE_TYPE_I &&
1911 avctx->profile == 0 && avctx->level == 5 &&
1912 s->intra_dc_precision == 2 &&
1913 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1914 s->progressive_frame == 0
1915 /* vbv_delay == 0xBBB || 0xE10 */;
1917 if (left >= 32 && !is_d10) {
1918 GetBitContext gb = s->gb;
1919 align_get_bits(&gb);
1920 if (show_bits(&gb, 24) == 0x060E2B) {
1921 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1927 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1928 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1929 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1930 left, show_bits(&s->gb, FFMIN(left, 23)));
1931 return AVERROR_INVALIDDATA;
1935 // There are some files out there which are missing the last slice
1936 // in cases where the slice is completely outside the visible
1937 // area, we detect this here instead of running into the end expecting
1939 if (s->mb_y >= ((s->height + 15) >> 4) &&
1940 s->progressive_frame &&
1941 !s->progressive_sequence &&
1942 get_bits_left(&s->gb) <= 8 &&
1943 get_bits_left(&s->gb) >= 0 &&
1944 s->mb_skip_run == -1 &&
1945 show_bits(&s->gb, 8) == 0)
1948 ff_init_block_index(s);
1951 /* skip mb handling */
1952 if (s->mb_skip_run == -1) {
1953 /* read increment again */
1956 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1957 MBINCR_VLC_BITS, 2);
1959 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1960 return AVERROR_INVALIDDATA;
1964 s->mb_skip_run += 33;
1965 } else if (code == 35) {
1966 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1967 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1968 return AVERROR_INVALIDDATA;
1970 goto eos; /* end of slice */
1972 /* otherwise, stuffing, nothing to do */
1974 s->mb_skip_run += code;
1978 if (s->mb_skip_run) {
1980 if (s->pict_type == AV_PICTURE_TYPE_I) {
1981 av_log(s->avctx, AV_LOG_ERROR,
1982 "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1983 return AVERROR_INVALIDDATA;
1988 for (i = 0; i < 12; i++)
1989 s->block_last_index[i] = -1;
1990 if (s->picture_structure == PICT_FRAME)
1991 s->mv_type = MV_TYPE_16X16;
1993 s->mv_type = MV_TYPE_FIELD;
1994 if (s->pict_type == AV_PICTURE_TYPE_P) {
1995 /* if P type, zero motion vector is implied */
1996 s->mv_dir = MV_DIR_FORWARD;
1997 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1998 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1999 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
2000 s->field_select[0][0] = (s->picture_structure - 1) & 1;
2002 /* if B type, reuse previous vectors and directions */
2003 s->mv[0][0][0] = s->last_mv[0][0][0];
2004 s->mv[0][0][1] = s->last_mv[0][0][1];
2005 s->mv[1][0][0] = s->last_mv[1][0][0];
2006 s->mv[1][0][1] = s->last_mv[1][0][1];
2011 eos: // end of slice
2012 if (get_bits_left(&s->gb) < 0) {
2013 av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
2014 return AVERROR_INVALIDDATA;
2016 *buf += (get_bits_count(&s->gb) - 1) / 8;
2017 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);
2021 static int slice_decode_thread(AVCodecContext *c, void *arg)
2023 MpegEncContext *s = *(void **) arg;
2024 const uint8_t *buf = s->gb.buffer;
2025 int mb_y = s->start_mb_y;
2026 const int field_pic = s->picture_structure != PICT_FRAME;
2028 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
2031 uint32_t start_code;
2034 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
2036 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2037 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
2038 s->start_mb_y, s->end_mb_y, s->er.error_count);
2040 if (c->err_recognition & AV_EF_EXPLODE)
2042 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
2043 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2045 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2047 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
2048 s->mb_x - 1, s->mb_y,
2049 ER_AC_END | ER_DC_END | ER_MV_END);
2052 if (s->mb_y == s->end_mb_y)
2056 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
2057 mb_y = start_code - SLICE_MIN_START_CODE;
2058 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
2059 mb_y += (*buf&0xE0)<<2;
2061 if (s->picture_structure == PICT_BOTTOM_FIELD)
2063 if (mb_y < 0 || mb_y >= s->end_mb_y)
2064 return AVERROR_INVALIDDATA;
2069 * Handle slice ends.
2070 * @return 1 if it seems to be the last slice
2072 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2074 Mpeg1Context *s1 = avctx->priv_data;
2075 MpegEncContext *s = &s1->mpeg_enc_ctx;
2077 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2080 if (s->avctx->hwaccel) {
2081 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
2082 av_log(avctx, AV_LOG_ERROR,
2083 "hardware accelerator failed to decode picture\n");
2086 /* end of slice reached */
2087 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
2090 ff_er_frame_end(&s->er);
2092 ff_mpv_frame_end(s);
2094 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2095 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2098 ff_print_debug_info(s, s->current_picture_ptr, pict);
2099 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2101 if (avctx->active_thread_type & FF_THREAD_FRAME)
2102 s->picture_number++;
2103 /* latency of 1 frame for I- and P-frames */
2104 /* XXX: use another variable than picture_number */
2105 if (s->last_picture_ptr) {
2106 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2109 ff_print_debug_info(s, s->last_picture_ptr, pict);
2110 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
2120 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2121 const uint8_t *buf, int buf_size)
2123 Mpeg1Context *s1 = avctx->priv_data;
2124 MpegEncContext *s = &s1->mpeg_enc_ctx;
2128 init_get_bits(&s->gb, buf, buf_size * 8);
2130 width = get_bits(&s->gb, 12);
2131 height = get_bits(&s->gb, 12);
2132 if (width == 0 || height == 0) {
2133 av_log(avctx, AV_LOG_WARNING,
2134 "Invalid horizontal or vertical size value.\n");
2135 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2136 return AVERROR_INVALIDDATA;
2138 s->aspect_ratio_info = get_bits(&s->gb, 4);
2139 if (s->aspect_ratio_info == 0) {
2140 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2141 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2142 return AVERROR_INVALIDDATA;
2144 s->frame_rate_index = get_bits(&s->gb, 4);
2145 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2146 av_log(avctx, AV_LOG_WARNING,
2147 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2148 s->frame_rate_index = 1;
2150 s->bit_rate = get_bits(&s->gb, 18) * 400;
2151 if (check_marker(&s->gb, "in sequence header") == 0) {
2152 return AVERROR_INVALIDDATA;
2157 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2158 skip_bits(&s->gb, 1);
2161 if (get_bits1(&s->gb)) {
2162 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2164 for (i = 0; i < 64; i++) {
2165 j = s->idsp.idct_permutation[i];
2166 v = ff_mpeg1_default_intra_matrix[i];
2167 s->intra_matrix[j] = v;
2168 s->chroma_intra_matrix[j] = v;
2171 if (get_bits1(&s->gb)) {
2172 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2174 for (i = 0; i < 64; i++) {
2175 int j = s->idsp.idct_permutation[i];
2176 v = ff_mpeg1_default_non_intra_matrix[i];
2177 s->inter_matrix[j] = v;
2178 s->chroma_inter_matrix[j] = v;
2182 if (show_bits(&s->gb, 23) != 0) {
2183 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2184 return AVERROR_INVALIDDATA;
2187 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2188 s->progressive_sequence = 1;
2189 s->progressive_frame = 1;
2190 s->picture_structure = PICT_FRAME;
2192 s->frame_pred_frame_dct = 1;
2193 s->chroma_format = 1;
2195 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2196 s->out_format = FMT_MPEG1;
2197 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2198 if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
2201 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2202 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d, aspect_ratio_info: %d \n",
2203 s->avctx->rc_buffer_size, s->bit_rate, s->aspect_ratio_info);
2208 static int vcr2_init_sequence(AVCodecContext *avctx)
2210 Mpeg1Context *s1 = avctx->priv_data;
2211 MpegEncContext *s = &s1->mpeg_enc_ctx;
2214 /* start new MPEG-1 context decoding */
2215 s->out_format = FMT_MPEG1;
2216 if (s1->mpeg_enc_ctx_allocated) {
2217 ff_mpv_common_end(s);
2218 s1->mpeg_enc_ctx_allocated = 0;
2220 s->width = avctx->coded_width;
2221 s->height = avctx->coded_height;
2222 avctx->has_b_frames = 0; // true?
2225 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2226 setup_hwaccel_for_pixfmt(avctx);
2228 ff_mpv_idct_init(s);
2229 if ((ret = ff_mpv_common_init(s)) < 0)
2231 s1->mpeg_enc_ctx_allocated = 1;
2233 for (i = 0; i < 64; i++) {
2234 int j = s->idsp.idct_permutation[i];
2235 v = ff_mpeg1_default_intra_matrix[i];
2236 s->intra_matrix[j] = v;
2237 s->chroma_intra_matrix[j] = v;
2239 v = ff_mpeg1_default_non_intra_matrix[i];
2240 s->inter_matrix[j] = v;
2241 s->chroma_inter_matrix[j] = v;
2244 s->progressive_sequence = 1;
2245 s->progressive_frame = 1;
2246 s->picture_structure = PICT_FRAME;
2248 s->frame_pred_frame_dct = 1;
2249 s->chroma_format = 1;
2250 if (s->codec_tag == AV_RL32("BW10")) {
2251 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2253 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2254 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2256 s1->save_width = s->width;
2257 s1->save_height = s->height;
2258 s1->save_progressive_seq = s->progressive_sequence;
2262 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2263 const uint8_t *p, int buf_size)
2265 Mpeg1Context *s1 = avctx->priv_data;
2267 if (buf_size >= 6 &&
2268 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2269 p[4] == 3 && (p[5] & 0x40)) {
2270 /* extract A53 Part 4 CC data */
2271 int cc_count = p[5] & 0x1f;
2272 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2273 av_freep(&s1->a53_caption);
2274 s1->a53_caption_size = cc_count * 3;
2275 s1->a53_caption = av_malloc(s1->a53_caption_size);
2276 if (s1->a53_caption)
2277 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2280 } else if (buf_size >= 11 &&
2281 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2282 /* extract DVD CC data */
2285 // There is a caption count field in the data, but it is often
2286 // incorect. So count the number of captions present.
2287 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2289 // Transform the DVD format into A53 Part 4 format
2291 av_freep(&s1->a53_caption);
2292 s1->a53_caption_size = cc_count * 6;
2293 s1->a53_caption = av_malloc(s1->a53_caption_size);
2294 if (s1->a53_caption) {
2295 uint8_t field1 = !!(p[4] & 0x80);
2296 uint8_t *cap = s1->a53_caption;
2298 for (i = 0; i < cc_count; i++) {
2299 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2302 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2315 static void mpeg_decode_user_data(AVCodecContext *avctx,
2316 const uint8_t *p, int buf_size)
2318 Mpeg1Context *s = avctx->priv_data;
2319 const uint8_t *buf_end = p + buf_size;
2320 Mpeg1Context *s1 = avctx->priv_data;
2324 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2325 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2327 av_log(avctx, AV_LOG_ERROR, "\n");
2333 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2337 /* we parse the DTG active format information */
2338 if (buf_end - p >= 5 &&
2339 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2347 if (buf_end - p < 1)
2350 FF_DISABLE_DEPRECATION_WARNINGS
2351 avctx->dtg_active_format = p[0] & 0x0f;
2352 FF_ENABLE_DEPRECATION_WARNINGS
2353 #endif /* FF_API_AFD */
2355 s1->afd = p[0] & 0x0f;
2357 } else if (buf_end - p >= 6 &&
2358 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2359 p[4] == 0x03) { // S3D_video_format_length
2360 // the 0x7F mask ignores the reserved_bit value
2361 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2363 if (S3D_video_format_type == 0x03 ||
2364 S3D_video_format_type == 0x04 ||
2365 S3D_video_format_type == 0x08 ||
2366 S3D_video_format_type == 0x23) {
2368 s1->has_stereo3d = 1;
2370 switch (S3D_video_format_type) {
2372 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2375 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2378 s1->stereo3d.type = AV_STEREO3D_2D;
2381 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2385 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2390 static void mpeg_decode_gop(AVCodecContext *avctx,
2391 const uint8_t *buf, int buf_size)
2393 Mpeg1Context *s1 = avctx->priv_data;
2394 MpegEncContext *s = &s1->mpeg_enc_ctx;
2398 init_get_bits(&s->gb, buf, buf_size * 8);
2400 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2402 s->closed_gop = get_bits1(&s->gb);
2403 /* broken_link indicate that after editing the
2404 * reference frames of the first B-Frames after GOP I-Frame
2405 * are missing (open gop) */
2406 broken_link = get_bits1(&s->gb);
2408 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2409 char tcbuf[AV_TIMECODE_STR_SIZE];
2410 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2411 av_log(s->avctx, AV_LOG_DEBUG,
2412 "GOP (%s) closed_gop=%d broken_link=%d\n",
2413 tcbuf, s->closed_gop, broken_link);
2417 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2418 int *got_output, const uint8_t *buf, int buf_size)
2420 Mpeg1Context *s = avctx->priv_data;
2421 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2422 const uint8_t *buf_ptr = buf;
2423 const uint8_t *buf_end = buf + buf_size;
2424 int ret, input_size;
2425 int last_code = 0, skip_frame = 0;
2426 int picture_start_code_seen = 0;
2429 /* find next start code */
2430 uint32_t start_code = -1;
2431 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2432 if (start_code > 0x1ff) {
2435 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2438 av_assert0(avctx->thread_count > 1);
2440 avctx->execute(avctx, slice_decode_thread,
2441 &s2->thread_context[0], NULL,
2442 s->slice_count, sizeof(void *));
2443 for (i = 0; i < s->slice_count; i++)
2444 s2->er.error_count += s2->thread_context[i]->er.error_count;
2447 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2448 && uses_vdpau(avctx))
2449 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2451 ret = slice_end(avctx, picture);
2455 // FIXME: merge with the stuff in mpeg_decode_slice
2456 if (s2->last_picture_ptr || s2->low_delay)
2462 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2463 return AVERROR_INVALIDDATA;
2465 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2468 input_size = buf_end - buf_ptr;
2470 if (avctx->debug & FF_DEBUG_STARTCODE)
2471 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2472 start_code, buf_ptr - buf, input_size);
2474 /* prepare data for next start code */
2475 switch (start_code) {
2476 case SEQ_START_CODE:
2477 if (last_code == 0) {
2478 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2479 if (buf != avctx->extradata)
2482 av_log(avctx, AV_LOG_ERROR,
2483 "ignoring SEQ_START_CODE after %X\n", last_code);
2484 if (avctx->err_recognition & AV_EF_EXPLODE)
2485 return AVERROR_INVALIDDATA;
2489 case PICTURE_START_CODE:
2490 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2491 /* If it's a frame picture, there can't be more than one picture header.
2492 Yet, it does happen and we need to handle it. */
2493 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2496 picture_start_code_seen = 1;
2498 if (s2->width <= 0 || s2->height <= 0) {
2499 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2500 s2->width, s2->height);
2501 return AVERROR_INVALIDDATA;
2505 s2->intra_dc_precision= 3;
2506 s2->intra_matrix[0]= 1;
2508 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2509 !avctx->hwaccel && s->slice_count) {
2512 avctx->execute(avctx, slice_decode_thread,
2513 s2->thread_context, NULL,
2514 s->slice_count, sizeof(void *));
2515 for (i = 0; i < s->slice_count; i++)
2516 s2->er.error_count += s2->thread_context[i]->er.error_count;
2519 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2520 ret = mpeg_decode_postinit(avctx);
2522 av_log(avctx, AV_LOG_ERROR,
2523 "mpeg_decode_postinit() failure\n");
2527 /* We have a complete image: we try to decompress it. */
2528 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2531 last_code = PICTURE_START_CODE;
2533 av_log(avctx, AV_LOG_ERROR,
2534 "ignoring pic after %X\n", last_code);
2535 if (avctx->err_recognition & AV_EF_EXPLODE)
2536 return AVERROR_INVALIDDATA;
2539 case EXT_START_CODE:
2540 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2542 switch (get_bits(&s2->gb, 4)) {
2544 if (last_code == 0) {
2545 mpeg_decode_sequence_extension(s);
2547 av_log(avctx, AV_LOG_ERROR,
2548 "ignoring seq ext after %X\n", last_code);
2549 if (avctx->err_recognition & AV_EF_EXPLODE)
2550 return AVERROR_INVALIDDATA;
2554 mpeg_decode_sequence_display_extension(s);
2557 mpeg_decode_quant_matrix_extension(s2);
2560 mpeg_decode_picture_display_extension(s);
2563 if (last_code == PICTURE_START_CODE) {
2564 mpeg_decode_picture_coding_extension(s);
2566 av_log(avctx, AV_LOG_ERROR,
2567 "ignoring pic cod ext after %X\n", last_code);
2568 if (avctx->err_recognition & AV_EF_EXPLODE)
2569 return AVERROR_INVALIDDATA;
2574 case USER_START_CODE:
2575 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2577 case GOP_START_CODE:
2578 if (last_code == 0) {
2579 s2->first_field = 0;
2580 mpeg_decode_gop(avctx, buf_ptr, input_size);
2583 av_log(avctx, AV_LOG_ERROR,
2584 "ignoring GOP_START_CODE after %X\n", last_code);
2585 if (avctx->err_recognition & AV_EF_EXPLODE)
2586 return AVERROR_INVALIDDATA;
2590 if (start_code >= SLICE_MIN_START_CODE &&
2591 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2592 if (s2->progressive_sequence && !s2->progressive_frame) {
2593 s2->progressive_frame = 1;
2594 av_log(s2->avctx, AV_LOG_ERROR,
2595 "interlaced frame in progressive sequence, ignoring\n");
2598 if (s2->picture_structure == 0 ||
2599 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2600 av_log(s2->avctx, AV_LOG_ERROR,
2601 "picture_structure %d invalid, ignoring\n",
2602 s2->picture_structure);
2603 s2->picture_structure = PICT_FRAME;
2606 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2607 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2609 if (s2->picture_structure == PICT_FRAME) {
2610 s2->first_field = 0;
2611 s2->v_edge_pos = 16 * s2->mb_height;
2613 s2->first_field ^= 1;
2614 s2->v_edge_pos = 8 * s2->mb_height;
2615 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2618 if (start_code >= SLICE_MIN_START_CODE &&
2619 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2620 const int field_pic = s2->picture_structure != PICT_FRAME;
2621 int mb_y = start_code - SLICE_MIN_START_CODE;
2622 last_code = SLICE_MIN_START_CODE;
2623 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2624 mb_y += (*buf_ptr&0xE0)<<2;
2627 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2630 if (buf_end - buf_ptr < 2) {
2631 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2632 return AVERROR_INVALIDDATA;
2635 if (mb_y >= s2->mb_height) {
2636 av_log(s2->avctx, AV_LOG_ERROR,
2637 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2638 return AVERROR_INVALIDDATA;
2641 if (!s2->last_picture_ptr) {
2642 /* Skip B-frames if we do not have reference frames and
2643 * GOP is not closed. */
2644 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2645 if (!s2->closed_gop) {
2651 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & CODEC_FLAG2_SHOW_ALL))
2653 if (!s2->next_picture_ptr) {
2654 /* Skip P-frames if we do not have a reference frame or
2655 * we have an invalid header. */
2656 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2661 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2662 s2->pict_type == AV_PICTURE_TYPE_B) ||
2663 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2664 s2->pict_type != AV_PICTURE_TYPE_I) ||
2665 avctx->skip_frame >= AVDISCARD_ALL) {
2670 if (!s->mpeg_enc_ctx_allocated)
2673 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2674 if (mb_y < avctx->skip_top ||
2675 mb_y >= s2->mb_height - avctx->skip_bottom)
2679 if (!s2->pict_type) {
2680 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2681 if (avctx->err_recognition & AV_EF_EXPLODE)
2682 return AVERROR_INVALIDDATA;
2686 if (s->first_slice) {
2689 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2692 if (!s2->current_picture_ptr) {
2693 av_log(avctx, AV_LOG_ERROR,
2694 "current_picture not initialized\n");
2695 return AVERROR_INVALIDDATA;
2698 if (uses_vdpau(avctx)) {
2704 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2706 int threshold = (s2->mb_height * s->slice_count +
2707 s2->slice_context_count / 2) /
2708 s2->slice_context_count;
2709 av_assert0(avctx->thread_count > 1);
2710 if (threshold <= mb_y) {
2711 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2713 thread_context->start_mb_y = mb_y;
2714 thread_context->end_mb_y = s2->mb_height;
2715 if (s->slice_count) {
2716 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2717 ret = ff_update_duplicate_context(thread_context, s2);
2721 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2724 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2726 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2730 if (avctx->err_recognition & AV_EF_EXPLODE)
2732 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2733 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2734 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2735 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2737 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2738 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2739 ER_AC_END | ER_DC_END | ER_MV_END);
2748 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2749 int *got_output, AVPacket *avpkt)
2751 const uint8_t *buf = avpkt->data;
2753 int buf_size = avpkt->size;
2754 Mpeg1Context *s = avctx->priv_data;
2755 AVFrame *picture = data;
2756 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2758 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2759 /* special case for last picture */
2760 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2761 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2765 s2->next_picture_ptr = NULL;
2772 if (s2->avctx->flags & CODEC_FLAG_TRUNCATED) {
2773 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2776 if (ff_combine_frame(&s2->parse_context, next,
2777 (const uint8_t **) &buf, &buf_size) < 0)
2781 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2782 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2783 || s2->codec_tag == AV_RL32("BW10")
2785 vcr2_init_sequence(avctx);
2789 if (avctx->extradata && !s->extradata_decoded) {
2790 ret = decode_chunks(avctx, picture, got_output,
2791 avctx->extradata, avctx->extradata_size);
2793 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2796 s->extradata_decoded = 1;
2797 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2798 s2->current_picture_ptr = NULL;
2803 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2804 if (ret<0 || *got_output)
2805 s2->current_picture_ptr = NULL;
2810 static void flush(AVCodecContext *avctx)
2812 Mpeg1Context *s = avctx->priv_data;
2816 ff_mpeg_flush(avctx);
2819 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2821 Mpeg1Context *s = avctx->priv_data;
2823 if (s->mpeg_enc_ctx_allocated)
2824 ff_mpv_common_end(&s->mpeg_enc_ctx);
2825 av_freep(&s->a53_caption);
2829 static const AVProfile mpeg2_video_profiles[] = {
2830 { FF_PROFILE_MPEG2_422, "4:2:2" },
2831 { FF_PROFILE_MPEG2_HIGH, "High" },
2832 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2833 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2834 { FF_PROFILE_MPEG2_MAIN, "Main" },
2835 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2836 { FF_PROFILE_RESERVED, "Reserved" },
2837 { FF_PROFILE_RESERVED, "Reserved" },
2838 { FF_PROFILE_UNKNOWN },
2841 AVCodec ff_mpeg1video_decoder = {
2842 .name = "mpeg1video",
2843 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2844 .type = AVMEDIA_TYPE_VIDEO,
2845 .id = AV_CODEC_ID_MPEG1VIDEO,
2846 .priv_data_size = sizeof(Mpeg1Context),
2847 .init = mpeg_decode_init,
2848 .close = mpeg_decode_end,
2849 .decode = mpeg_decode_frame,
2850 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2851 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2852 CODEC_CAP_SLICE_THREADS,
2855 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2858 AVCodec ff_mpeg2video_decoder = {
2859 .name = "mpeg2video",
2860 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2861 .type = AVMEDIA_TYPE_VIDEO,
2862 .id = AV_CODEC_ID_MPEG2VIDEO,
2863 .priv_data_size = sizeof(Mpeg1Context),
2864 .init = mpeg_decode_init,
2865 .close = mpeg_decode_end,
2866 .decode = mpeg_decode_frame,
2867 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2868 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2869 CODEC_CAP_SLICE_THREADS,
2872 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2876 AVCodec ff_mpegvideo_decoder = {
2877 .name = "mpegvideo",
2878 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2879 .type = AVMEDIA_TYPE_VIDEO,
2880 .id = AV_CODEC_ID_MPEG2VIDEO,
2881 .priv_data_size = sizeof(Mpeg1Context),
2882 .init = mpeg_decode_init,
2883 .close = mpeg_decode_end,
2884 .decode = mpeg_decode_frame,
2885 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2891 #if CONFIG_MPEG_XVMC_DECODER
2892 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2894 if (avctx->active_thread_type & FF_THREAD_SLICE)
2896 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2898 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2899 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2901 mpeg_decode_init(avctx);
2903 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2904 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2909 AVCodec ff_mpeg_xvmc_decoder = {
2910 .name = "mpegvideo_xvmc",
2911 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2912 .type = AVMEDIA_TYPE_VIDEO,
2913 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2914 .priv_data_size = sizeof(Mpeg1Context),
2915 .init = mpeg_mc_decode_init,
2916 .close = mpeg_decode_end,
2917 .decode = mpeg_decode_frame,
2918 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2919 CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2924 #endif /* FF_API_XVMC */
2926 #if CONFIG_MPEG_VDPAU_DECODER
2927 AVCodec ff_mpeg_vdpau_decoder = {
2928 .name = "mpegvideo_vdpau",
2929 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2930 .type = AVMEDIA_TYPE_VIDEO,
2931 .id = AV_CODEC_ID_MPEG2VIDEO,
2932 .priv_data_size = sizeof(Mpeg1Context),
2933 .init = mpeg_decode_init,
2934 .close = mpeg_decode_end,
2935 .decode = mpeg_decode_frame,
2936 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2937 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2942 #if CONFIG_MPEG1_VDPAU_DECODER
2943 AVCodec ff_mpeg1_vdpau_decoder = {
2944 .name = "mpeg1video_vdpau",
2945 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2946 .type = AVMEDIA_TYPE_VIDEO,
2947 .id = AV_CODEC_ID_MPEG1VIDEO,
2948 .priv_data_size = sizeof(Mpeg1Context),
2949 .init = mpeg_decode_init,
2950 .close = mpeg_decode_end,
2951 .decode = mpeg_decode_frame,
2952 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2953 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,