3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "libavutil/attributes.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/stereo3d.h"
35 #include "bytestream.h"
36 #include "error_resilience.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
46 #include "xvmc_internal.h"
48 typedef struct Mpeg1Context {
49 MpegEncContext mpeg_enc_ctx;
50 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
51 int repeat_field; /* true if we must repeat the field */
52 AVPanScan pan_scan; /* some temporary storage for the panscan */
61 int save_width, save_height, save_progressive_seq;
62 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
63 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
64 int closed_gop; /* GOP is closed */
66 int extradata_decoded;
69 #define MB_TYPE_ZERO_MV 0x20000000
71 static const uint32_t ptype2mb_type[7] = {
73 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
75 MB_TYPE_L0 | MB_TYPE_CBP,
76 MB_TYPE_QUANT | MB_TYPE_INTRA,
77 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
78 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
81 static const uint32_t btype2mb_type[11] = {
84 MB_TYPE_L1 | MB_TYPE_CBP,
86 MB_TYPE_L0 | MB_TYPE_CBP,
88 MB_TYPE_L0L1 | MB_TYPE_CBP,
89 MB_TYPE_QUANT | MB_TYPE_INTRA,
90 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
91 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
92 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
95 static const uint8_t non_linear_qscale[32] = {
96 0, 1, 2, 3, 4, 5, 6, 7,
97 8, 10, 12, 14, 16, 18, 20, 22,
98 24, 28, 32, 36, 40, 44, 48, 52,
99 56, 64, 72, 80, 88, 96, 104, 112,
102 /* as H.263, but only 17 codes */
103 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
105 int code, sign, val, shift;
107 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
113 sign = get_bits1(&s->gb);
117 val = (val - 1) << shift;
118 val |= get_bits(&s->gb, shift);
125 /* modulo decoding */
126 return sign_extend(val, 5 + shift);
129 #define check_scantable_index(ctx, x) \
132 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
133 ctx->mb_x, ctx->mb_y); \
134 return AVERROR_INVALIDDATA; \
138 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
139 int16_t *block, int n)
141 int level, dc, diff, i, j, run;
143 RLTable *rl = &ff_rl_mpeg1;
144 uint8_t *const scantable = s->intra_scantable.permutated;
145 const uint16_t *quant_matrix = s->intra_matrix;
146 const int qscale = s->qscale;
149 component = (n <= 3 ? 0 : n - 4 + 1);
150 diff = decode_dc(&s->gb, component);
152 return AVERROR_INVALIDDATA;
153 dc = s->last_dc[component];
155 s->last_dc[component] = dc;
156 block[0] = dc * quant_matrix[0];
157 ff_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
160 OPEN_READER(re, &s->gb);
161 /* now quantify & encode AC coefficients */
163 UPDATE_CACHE(re, &s->gb);
164 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
169 } else if (level != 0) {
171 check_scantable_index(s, i);
173 level = (level * qscale * quant_matrix[j]) >> 4;
174 level = (level - 1) | 1;
175 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
176 SHOW_SBITS(re, &s->gb, 1);
177 LAST_SKIP_BITS(re, &s->gb, 1);
180 run = SHOW_UBITS(re, &s->gb, 6) + 1;
181 LAST_SKIP_BITS(re, &s->gb, 6);
182 UPDATE_CACHE(re, &s->gb);
183 level = SHOW_SBITS(re, &s->gb, 8);
184 SKIP_BITS(re, &s->gb, 8);
186 level = SHOW_UBITS(re, &s->gb, 8) - 256;
187 LAST_SKIP_BITS(re, &s->gb, 8);
188 } else if (level == 0) {
189 level = SHOW_UBITS(re, &s->gb, 8);
190 LAST_SKIP_BITS(re, &s->gb, 8);
193 check_scantable_index(s, i);
197 level = (level * qscale * quant_matrix[j]) >> 4;
198 level = (level - 1) | 1;
201 level = (level * qscale * quant_matrix[j]) >> 4;
202 level = (level - 1) | 1;
208 CLOSE_READER(re, &s->gb);
210 s->block_last_index[n] = i;
214 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
216 return mpeg1_decode_block_intra(s, block, n);
219 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
220 int16_t *block, int n)
222 int level, i, j, run;
223 RLTable *rl = &ff_rl_mpeg1;
224 uint8_t *const scantable = s->intra_scantable.permutated;
225 const uint16_t *quant_matrix = s->inter_matrix;
226 const int qscale = s->qscale;
229 OPEN_READER(re, &s->gb);
231 // special case for first coefficient, no need to add second VLC table
232 UPDATE_CACHE(re, &s->gb);
233 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
234 level = (3 * qscale * quant_matrix[0]) >> 5;
235 level = (level - 1) | 1;
236 if (GET_CACHE(re, &s->gb) & 0x40000000)
240 SKIP_BITS(re, &s->gb, 2);
241 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
244 /* now quantify & encode AC coefficients */
246 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
251 check_scantable_index(s, i);
253 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
254 level = (level - 1) | 1;
255 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
256 SHOW_SBITS(re, &s->gb, 1);
257 SKIP_BITS(re, &s->gb, 1);
260 run = SHOW_UBITS(re, &s->gb, 6) + 1;
261 LAST_SKIP_BITS(re, &s->gb, 6);
262 UPDATE_CACHE(re, &s->gb);
263 level = SHOW_SBITS(re, &s->gb, 8);
264 SKIP_BITS(re, &s->gb, 8);
266 level = SHOW_UBITS(re, &s->gb, 8) - 256;
267 SKIP_BITS(re, &s->gb, 8);
268 } else if (level == 0) {
269 level = SHOW_UBITS(re, &s->gb, 8);
270 SKIP_BITS(re, &s->gb, 8);
273 check_scantable_index(s, i);
277 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
278 level = (level - 1) | 1;
281 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
282 level = (level - 1) | 1;
287 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
289 UPDATE_CACHE(re, &s->gb);
292 LAST_SKIP_BITS(re, &s->gb, 2);
293 CLOSE_READER(re, &s->gb);
295 s->block_last_index[n] = i;
299 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
300 int16_t *block, int n)
302 int level, i, j, run;
303 RLTable *rl = &ff_rl_mpeg1;
304 uint8_t *const scantable = s->intra_scantable.permutated;
305 const int qscale = s->qscale;
308 OPEN_READER(re, &s->gb);
310 // Special case for first coefficient, no need to add second VLC table.
311 UPDATE_CACHE(re, &s->gb);
312 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
313 level = (3 * qscale) >> 1;
314 level = (level - 1) | 1;
315 if (GET_CACHE(re, &s->gb) & 0x40000000)
319 SKIP_BITS(re, &s->gb, 2);
320 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
324 /* now quantify & encode AC coefficients */
326 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
331 check_scantable_index(s, i);
333 level = ((level * 2 + 1) * qscale) >> 1;
334 level = (level - 1) | 1;
335 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
336 SHOW_SBITS(re, &s->gb, 1);
337 SKIP_BITS(re, &s->gb, 1);
340 run = SHOW_UBITS(re, &s->gb, 6) + 1;
341 LAST_SKIP_BITS(re, &s->gb, 6);
342 UPDATE_CACHE(re, &s->gb);
343 level = SHOW_SBITS(re, &s->gb, 8);
344 SKIP_BITS(re, &s->gb, 8);
346 level = SHOW_UBITS(re, &s->gb, 8) - 256;
347 SKIP_BITS(re, &s->gb, 8);
348 } else if (level == 0) {
349 level = SHOW_UBITS(re, &s->gb, 8);
350 SKIP_BITS(re, &s->gb, 8);
353 check_scantable_index(s, i);
357 level = ((level * 2 + 1) * qscale) >> 1;
358 level = (level - 1) | 1;
361 level = ((level * 2 + 1) * qscale) >> 1;
362 level = (level - 1) | 1;
367 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
369 UPDATE_CACHE(re, &s->gb);
372 LAST_SKIP_BITS(re, &s->gb, 2);
373 CLOSE_READER(re, &s->gb);
375 s->block_last_index[n] = i;
379 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
380 int16_t *block, int n)
382 int level, i, j, run;
383 RLTable *rl = &ff_rl_mpeg1;
384 uint8_t *const scantable = s->intra_scantable.permutated;
385 const uint16_t *quant_matrix;
386 const int qscale = s->qscale;
392 OPEN_READER(re, &s->gb);
395 quant_matrix = s->inter_matrix;
397 quant_matrix = s->chroma_inter_matrix;
399 // Special case for first coefficient, no need to add second VLC table.
400 UPDATE_CACHE(re, &s->gb);
401 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
402 level = (3 * qscale * quant_matrix[0]) >> 5;
403 if (GET_CACHE(re, &s->gb) & 0x40000000)
408 SKIP_BITS(re, &s->gb, 2);
409 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
413 /* now quantify & encode AC coefficients */
415 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
420 check_scantable_index(s, i);
422 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
423 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
424 SHOW_SBITS(re, &s->gb, 1);
425 SKIP_BITS(re, &s->gb, 1);
428 run = SHOW_UBITS(re, &s->gb, 6) + 1;
429 LAST_SKIP_BITS(re, &s->gb, 6);
430 UPDATE_CACHE(re, &s->gb);
431 level = SHOW_SBITS(re, &s->gb, 12);
432 SKIP_BITS(re, &s->gb, 12);
435 check_scantable_index(s, i);
438 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
441 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
447 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
449 UPDATE_CACHE(re, &s->gb);
452 LAST_SKIP_BITS(re, &s->gb, 2);
453 CLOSE_READER(re, &s->gb);
455 block[63] ^= (mismatch & 1);
457 s->block_last_index[n] = i;
461 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
462 int16_t *block, int n)
464 int level, i, j, run;
465 RLTable *rl = &ff_rl_mpeg1;
466 uint8_t *const scantable = s->intra_scantable.permutated;
467 const int qscale = s->qscale;
468 OPEN_READER(re, &s->gb);
471 // special case for first coefficient, no need to add second VLC table
472 UPDATE_CACHE(re, &s->gb);
473 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
474 level = (3 * qscale) >> 1;
475 if (GET_CACHE(re, &s->gb) & 0x40000000)
479 SKIP_BITS(re, &s->gb, 2);
480 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
484 /* now quantify & encode AC coefficients */
486 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
490 check_scantable_index(s, i);
492 level = ((level * 2 + 1) * qscale) >> 1;
493 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
494 SHOW_SBITS(re, &s->gb, 1);
495 SKIP_BITS(re, &s->gb, 1);
498 run = SHOW_UBITS(re, &s->gb, 6) + 1;
499 LAST_SKIP_BITS(re, &s->gb, 6);
500 UPDATE_CACHE(re, &s->gb);
501 level = SHOW_SBITS(re, &s->gb, 12);
502 SKIP_BITS(re, &s->gb, 12);
505 check_scantable_index(s, i);
508 level = ((-level * 2 + 1) * qscale) >> 1;
511 level = ((level * 2 + 1) * qscale) >> 1;
516 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
518 UPDATE_CACHE(re, &s->gb);
521 LAST_SKIP_BITS(re, &s->gb, 2);
522 CLOSE_READER(re, &s->gb);
523 s->block_last_index[n] = i;
527 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
528 int16_t *block, int n)
530 int level, dc, diff, i, j, run;
533 uint8_t *const scantable = s->intra_scantable.permutated;
534 const uint16_t *quant_matrix;
535 const int qscale = s->qscale;
540 quant_matrix = s->intra_matrix;
543 quant_matrix = s->chroma_intra_matrix;
544 component = (n & 1) + 1;
546 diff = decode_dc(&s->gb, component);
548 return AVERROR_INVALIDDATA;
549 dc = s->last_dc[component];
551 s->last_dc[component] = dc;
552 block[0] = dc << (3 - s->intra_dc_precision);
553 ff_dlog(s->avctx, "dc=%d\n", block[0]);
554 mismatch = block[0] ^ 1;
556 if (s->intra_vlc_format)
562 OPEN_READER(re, &s->gb);
563 /* now quantify & encode AC coefficients */
565 UPDATE_CACHE(re, &s->gb);
566 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
571 } else if (level != 0) {
573 check_scantable_index(s, i);
575 level = (level * qscale * quant_matrix[j]) >> 4;
576 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
577 SHOW_SBITS(re, &s->gb, 1);
578 LAST_SKIP_BITS(re, &s->gb, 1);
581 run = SHOW_UBITS(re, &s->gb, 6) + 1;
582 LAST_SKIP_BITS(re, &s->gb, 6);
583 UPDATE_CACHE(re, &s->gb);
584 level = SHOW_SBITS(re, &s->gb, 12);
585 SKIP_BITS(re, &s->gb, 12);
587 check_scantable_index(s, i);
590 level = (-level * qscale * quant_matrix[j]) >> 4;
593 level = (level * qscale * quant_matrix[j]) >> 4;
600 CLOSE_READER(re, &s->gb);
602 block[63] ^= mismatch & 1;
604 s->block_last_index[n] = i;
608 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
609 int16_t *block, int n)
611 int level, dc, diff, i, j, run;
614 uint8_t *const scantable = s->intra_scantable.permutated;
615 const uint16_t *quant_matrix;
616 const int qscale = s->qscale;
620 quant_matrix = s->intra_matrix;
623 quant_matrix = s->chroma_intra_matrix;
624 component = (n & 1) + 1;
626 diff = decode_dc(&s->gb, component);
628 return AVERROR_INVALIDDATA;
629 dc = s->last_dc[component];
631 s->last_dc[component] = dc;
632 block[0] = dc << (3 - s->intra_dc_precision);
634 if (s->intra_vlc_format)
640 OPEN_READER(re, &s->gb);
641 /* now quantify & encode AC coefficients */
643 UPDATE_CACHE(re, &s->gb);
644 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
649 } else if (level != 0) {
651 check_scantable_index(s, i);
653 level = (level * qscale * quant_matrix[j]) >> 4;
654 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
655 SHOW_SBITS(re, &s->gb, 1);
656 LAST_SKIP_BITS(re, &s->gb, 1);
659 run = SHOW_UBITS(re, &s->gb, 6) + 1;
660 LAST_SKIP_BITS(re, &s->gb, 6);
661 UPDATE_CACHE(re, &s->gb);
662 level = SHOW_SBITS(re, &s->gb, 12);
663 SKIP_BITS(re, &s->gb, 12);
665 check_scantable_index(s, i);
668 level = (-level * qscale * quant_matrix[j]) >> 4;
671 level = (level * qscale * quant_matrix[j]) >> 4;
677 CLOSE_READER(re, &s->gb);
680 s->block_last_index[n] = i;
684 /******************************************/
687 static inline int get_dmv(MpegEncContext *s)
689 if (get_bits1(&s->gb))
690 return 1 - (get_bits1(&s->gb) << 1);
695 static inline int get_qscale(MpegEncContext *s)
697 int qscale = get_bits(&s->gb, 5);
699 return non_linear_qscale[qscale];
704 /* motion type (for MPEG-2) */
710 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
712 int i, j, k, cbp, val, mb_type, motion_type;
713 const int mb_block_count = 4 + (1 << s->chroma_format);
716 ff_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
718 assert(s->mb_skipped == 0);
720 if (s->mb_skip_run-- != 0) {
721 if (s->pict_type == AV_PICTURE_TYPE_P) {
723 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
724 MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
729 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
731 // FIXME not sure if this is allowed in MPEG at all
732 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
733 if (IS_INTRA(mb_type))
734 return AVERROR_INVALIDDATA;
735 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
736 mb_type | MB_TYPE_SKIP;
737 // assert(s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
739 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
746 switch (s->pict_type) {
748 case AV_PICTURE_TYPE_I:
749 if (get_bits1(&s->gb) == 0) {
750 if (get_bits1(&s->gb) == 0) {
751 av_log(s->avctx, AV_LOG_ERROR,
752 "invalid mb type in I Frame at %d %d\n",
754 return AVERROR_INVALIDDATA;
756 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
758 mb_type = MB_TYPE_INTRA;
761 case AV_PICTURE_TYPE_P:
762 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
764 av_log(s->avctx, AV_LOG_ERROR,
765 "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
766 return AVERROR_INVALIDDATA;
768 mb_type = ptype2mb_type[mb_type];
770 case AV_PICTURE_TYPE_B:
771 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
773 av_log(s->avctx, AV_LOG_ERROR,
774 "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
775 return AVERROR_INVALIDDATA;
777 mb_type = btype2mb_type[mb_type];
780 ff_dlog(s->avctx, "mb_type=%x\n", mb_type);
781 // motion_type = 0; /* avoid warning */
782 if (IS_INTRA(mb_type)) {
783 s->bdsp.clear_blocks(s->block[0]);
785 if (!s->chroma_y_shift)
786 s->bdsp.clear_blocks(s->block[6]);
788 /* compute DCT type */
789 // FIXME: add an interlaced_dct coded var?
790 if (s->picture_structure == PICT_FRAME &&
791 !s->frame_pred_frame_dct)
792 s->interlaced_dct = get_bits1(&s->gb);
794 if (IS_QUANT(mb_type))
795 s->qscale = get_qscale(s);
797 if (s->concealment_motion_vectors) {
798 /* just parse them */
799 if (s->picture_structure != PICT_FRAME)
800 skip_bits1(&s->gb); /* field select */
803 s->last_mv[0][0][0] =
804 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
805 s->last_mv[0][0][0]);
807 s->last_mv[0][0][1] =
808 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
809 s->last_mv[0][0][1]);
811 skip_bits1(&s->gb); /* marker */
813 /* reset mv prediction */
814 memset(s->last_mv, 0, sizeof(s->last_mv));
818 FF_DISABLE_DEPRECATION_WARNINGS
819 // if 1, we memcpy blocks in xvmcvideo
820 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
821 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
822 FF_ENABLE_DEPRECATION_WARNINGS
823 #endif /* FF_API_XVMC */
825 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
826 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
827 for (i = 0; i < 6; i++)
828 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
830 for (i = 0; i < mb_block_count; i++)
831 if ((ret = mpeg2_decode_block_intra(s, *s->pblocks[i], i)) < 0)
835 for (i = 0; i < 6; i++)
836 if ((ret = mpeg1_decode_block_intra(s, *s->pblocks[i], i)) < 0)
840 if (mb_type & MB_TYPE_ZERO_MV) {
841 assert(mb_type & MB_TYPE_CBP);
843 s->mv_dir = MV_DIR_FORWARD;
844 if (s->picture_structure == PICT_FRAME) {
845 if (!s->frame_pred_frame_dct)
846 s->interlaced_dct = get_bits1(&s->gb);
847 s->mv_type = MV_TYPE_16X16;
849 s->mv_type = MV_TYPE_FIELD;
850 mb_type |= MB_TYPE_INTERLACED;
851 s->field_select[0][0] = s->picture_structure - 1;
854 if (IS_QUANT(mb_type))
855 s->qscale = get_qscale(s);
857 s->last_mv[0][0][0] = 0;
858 s->last_mv[0][0][1] = 0;
859 s->last_mv[0][1][0] = 0;
860 s->last_mv[0][1][1] = 0;
864 assert(mb_type & MB_TYPE_L0L1);
865 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
866 /* get additional motion vector type */
867 if (s->frame_pred_frame_dct) {
868 motion_type = MT_FRAME;
870 motion_type = get_bits(&s->gb, 2);
871 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
872 s->interlaced_dct = get_bits1(&s->gb);
875 if (IS_QUANT(mb_type))
876 s->qscale = get_qscale(s);
879 s->mv_dir = (mb_type >> 13) & 3;
880 ff_dlog(s->avctx, "motion_type=%d\n", motion_type);
881 switch (motion_type) {
882 case MT_FRAME: /* or MT_16X8 */
883 if (s->picture_structure == PICT_FRAME) {
884 mb_type |= MB_TYPE_16x16;
885 s->mv_type = MV_TYPE_16X16;
886 for (i = 0; i < 2; i++) {
887 if (USES_LIST(mb_type, i)) {
890 s->last_mv[i][0][0] =
891 s->last_mv[i][1][0] =
892 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
893 s->last_mv[i][0][0]);
895 s->last_mv[i][0][1] =
896 s->last_mv[i][1][1] =
897 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
898 s->last_mv[i][0][1]);
899 /* full_pel: only for MPEG-1 */
900 if (s->full_pel[i]) {
901 s->mv[i][0][0] <<= 1;
902 s->mv[i][0][1] <<= 1;
907 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
908 s->mv_type = MV_TYPE_16X8;
909 for (i = 0; i < 2; i++) {
910 if (USES_LIST(mb_type, i)) {
912 for (j = 0; j < 2; j++) {
913 s->field_select[i][j] = get_bits1(&s->gb);
914 for (k = 0; k < 2; k++) {
915 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
916 s->last_mv[i][j][k]);
917 s->last_mv[i][j][k] = val;
918 s->mv[i][j][k] = val;
926 s->mv_type = MV_TYPE_FIELD;
927 if (s->picture_structure == PICT_FRAME) {
928 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
929 for (i = 0; i < 2; i++) {
930 if (USES_LIST(mb_type, i)) {
931 for (j = 0; j < 2; j++) {
932 s->field_select[i][j] = get_bits1(&s->gb);
933 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
934 s->last_mv[i][j][0]);
935 s->last_mv[i][j][0] = val;
936 s->mv[i][j][0] = val;
937 ff_dlog(s->avctx, "fmx=%d\n", val);
938 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
939 s->last_mv[i][j][1] >> 1);
940 s->last_mv[i][j][1] = val << 1;
941 s->mv[i][j][1] = val;
942 ff_dlog(s->avctx, "fmy=%d\n", val);
947 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
948 for (i = 0; i < 2; i++) {
949 if (USES_LIST(mb_type, i)) {
950 s->field_select[i][0] = get_bits1(&s->gb);
951 for (k = 0; k < 2; k++) {
952 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
953 s->last_mv[i][0][k]);
954 s->last_mv[i][0][k] = val;
955 s->last_mv[i][1][k] = val;
956 s->mv[i][0][k] = val;
963 s->mv_type = MV_TYPE_DMV;
964 for (i = 0; i < 2; i++) {
965 if (USES_LIST(mb_type, i)) {
966 int dmx, dmy, mx, my, m;
967 const int my_shift = s->picture_structure == PICT_FRAME;
969 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
970 s->last_mv[i][0][0]);
971 s->last_mv[i][0][0] = mx;
972 s->last_mv[i][1][0] = mx;
974 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
975 s->last_mv[i][0][1] >> my_shift);
979 s->last_mv[i][0][1] = my << my_shift;
980 s->last_mv[i][1][1] = my << my_shift;
984 s->mv[i][1][0] = mx; // not used
985 s->mv[i][1][1] = my; // not used
987 if (s->picture_structure == PICT_FRAME) {
988 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
990 // m = 1 + 2 * s->top_field_first;
991 m = s->top_field_first ? 1 : 3;
993 /* top -> top pred */
994 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
995 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
997 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
998 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1000 mb_type |= MB_TYPE_16x16;
1002 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1003 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1004 if (s->picture_structure == PICT_TOP_FIELD)
1013 av_log(s->avctx, AV_LOG_ERROR,
1014 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1015 return AVERROR_INVALIDDATA;
1020 if (HAS_CBP(mb_type)) {
1021 s->bdsp.clear_blocks(s->block[0]);
1023 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1024 if (mb_block_count > 6) {
1025 cbp <<= mb_block_count - 6;
1026 cbp |= get_bits(&s->gb, mb_block_count - 6);
1027 s->bdsp.clear_blocks(s->block[6]);
1030 av_log(s->avctx, AV_LOG_ERROR,
1031 "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1032 return AVERROR_INVALIDDATA;
1036 FF_DISABLE_DEPRECATION_WARNINGS
1037 // if 1, we memcpy blocks in xvmcvideo
1038 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1039 ff_xvmc_pack_pblocks(s, cbp);
1040 FF_ENABLE_DEPRECATION_WARNINGS
1041 #endif /* FF_API_XVMC */
1043 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1044 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
1045 for (i = 0; i < 6; i++) {
1047 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1049 s->block_last_index[i] = -1;
1053 cbp <<= 12 - mb_block_count;
1055 for (i = 0; i < mb_block_count; i++) {
1056 if (cbp & (1 << 11)) {
1057 if ((ret = mpeg2_decode_block_non_intra(s, *s->pblocks[i], i)) < 0)
1060 s->block_last_index[i] = -1;
1066 if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
1067 for (i = 0; i < 6; i++) {
1069 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1071 s->block_last_index[i] = -1;
1075 for (i = 0; i < 6; i++) {
1077 if ((ret = mpeg1_decode_block_inter(s, *s->pblocks[i], i)) < 0)
1080 s->block_last_index[i] = -1;
1087 for (i = 0; i < 12; i++)
1088 s->block_last_index[i] = -1;
1092 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1097 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1099 Mpeg1Context *s = avctx->priv_data;
1100 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1102 ff_mpv_decode_defaults(s2);
1104 s->mpeg_enc_ctx.avctx = avctx;
1106 /* we need some permutation to store matrices,
1107 * until the decoder sets the real permutation. */
1108 ff_mpv_idct_init(s2);
1109 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1110 ff_mpeg12_init_vlcs();
1112 s->mpeg_enc_ctx_allocated = 0;
1113 s->mpeg_enc_ctx.picture_number = 0;
1114 s->repeat_field = 0;
1115 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1116 avctx->color_range = AVCOL_RANGE_MPEG;
1117 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1118 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1120 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1124 static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
1125 const AVCodecContext *avctx_from)
1127 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1128 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1131 if (avctx == avctx_from ||
1132 !ctx_from->mpeg_enc_ctx_allocated ||
1133 !s1->context_initialized)
1136 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1140 if (!ctx->mpeg_enc_ctx_allocated) {
1141 // copy the whole context after the initial MpegEncContext structure
1142 memcpy(ctx, ctx_from, sizeof(*ctx));
1143 memset(&ctx->mpeg_enc_ctx, 0, sizeof(ctx->mpeg_enc_ctx));
1146 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1147 s->picture_number++;
1152 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1153 const uint8_t *new_perm)
1155 uint16_t temp_matrix[64];
1158 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1160 for (i = 0; i < 64; i++)
1161 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1165 static const enum AVPixelFormat pixfmt_xvmc_mpg2_420[] = {
1166 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1167 AV_PIX_FMT_XVMC_MPEG2_MC,
1170 #endif /* FF_API_XVMC */
1172 static const enum AVPixelFormat mpeg12_hwaccel_pixfmt_list_420[] = {
1173 #if CONFIG_MPEG2_DXVA2_HWACCEL
1174 AV_PIX_FMT_DXVA2_VLD,
1176 #if CONFIG_MPEG2_VAAPI_HWACCEL
1177 AV_PIX_FMT_VAAPI_VLD,
1179 #if CONFIG_MPEG1_VDPAU_HWACCEL | CONFIG_MPEG2_VDPAU_HWACCEL
1186 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
1191 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
1196 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1198 Mpeg1Context *s1 = avctx->priv_data;
1199 MpegEncContext *s = &s1->mpeg_enc_ctx;
1200 const enum AVPixelFormat *pix_fmts;
1203 FF_DISABLE_DEPRECATION_WARNINGS
1204 if (avctx->xvmc_acceleration)
1205 return ff_get_format(avctx, pixfmt_xvmc_mpg2_420);
1206 FF_ENABLE_DEPRECATION_WARNINGS
1207 #endif /* FF_API_XVMC */
1209 if (s->chroma_format < 2)
1210 pix_fmts = mpeg12_hwaccel_pixfmt_list_420;
1211 else if (s->chroma_format == 2)
1212 pix_fmts = mpeg12_pixfmt_list_422;
1214 pix_fmts = mpeg12_pixfmt_list_444;
1216 return ff_get_format(avctx, pix_fmts);
1219 /* Call this function when we know all parameters.
1220 * It may be called in different places for MPEG-1 and MPEG-2. */
1221 static int mpeg_decode_postinit(AVCodecContext *avctx)
1223 Mpeg1Context *s1 = avctx->priv_data;
1224 MpegEncContext *s = &s1->mpeg_enc_ctx;
1225 uint8_t old_permutation[64];
1228 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1229 avctx->coded_width != s->width ||
1230 avctx->coded_height != s->height ||
1231 s1->save_width != s->width ||
1232 s1->save_height != s->height ||
1233 s1->save_aspect_info != s->aspect_ratio_info ||
1234 s1->save_progressive_seq != s->progressive_sequence ||
1236 if (s1->mpeg_enc_ctx_allocated) {
1237 ParseContext pc = s->parse_context;
1238 s->parse_context.buffer = 0;
1239 ff_mpv_common_end(s);
1240 s->parse_context = pc;
1243 ret = ff_set_dimensions(avctx, s->width, s->height);
1247 avctx->bit_rate = s->bit_rate;
1248 s1->save_aspect_info = s->aspect_ratio_info;
1249 s1->save_width = s->width;
1250 s1->save_height = s->height;
1251 s1->save_progressive_seq = s->progressive_sequence;
1253 /* low_delay may be forced, in this case we will have B-frames
1254 * that behave like P-frames. */
1255 avctx->has_b_frames = !s->low_delay;
1257 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1259 avctx->framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
1261 avctx->sample_aspect_ratio = av_d2q(1.0 / ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1262 avctx->ticks_per_frame = 1;
1265 av_reduce(&s->avctx->framerate.num,
1266 &s->avctx->framerate.den,
1267 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num * 2,
1268 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1270 avctx->ticks_per_frame = 2;
1272 if (s->aspect_ratio_info > 1) {
1274 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1275 (AVRational) { s1->pan_scan.width,
1276 s1->pan_scan.height }),
1277 (AVRational) { s->width, s->height });
1279 /* We ignore the spec here and guess a bit as reality does not
1280 * match the spec, see for example res_change_ffmpeg_aspect.ts
1281 * and sequence-display-aspect.mpg.
1282 * issue1613, 621, 562 */
1283 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1284 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
1285 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
1286 s->avctx->sample_aspect_ratio =
1287 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1288 (AVRational) { s->width, s->height });
1290 s->avctx->sample_aspect_ratio =
1291 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1292 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
1293 // issue1613 4/3 16/9 -> 16/9
1294 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1295 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
1296 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1297 ff_dlog(avctx, "A %d/%d\n",
1298 ff_mpeg2_aspect[s->aspect_ratio_info].num,
1299 ff_mpeg2_aspect[s->aspect_ratio_info].den);
1300 ff_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1301 s->avctx->sample_aspect_ratio.den);
1304 s->avctx->sample_aspect_ratio =
1305 ff_mpeg2_aspect[s->aspect_ratio_info];
1309 ff_set_sar(s->avctx, s->avctx->sample_aspect_ratio);
1311 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1312 // until then pix_fmt may be changed right after codec init
1314 if ((avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1315 avctx->hwaccel) && avctx->idct_algo == FF_IDCT_AUTO)
1317 if (avctx->hwaccel && avctx->idct_algo == FF_IDCT_AUTO)
1318 #endif /* FF_API_XVMC */
1319 avctx->idct_algo = FF_IDCT_SIMPLE;
1321 /* Quantization matrices may need reordering
1322 * if DCT permutation is changed. */
1323 memcpy(old_permutation, s->idsp.idct_permutation, 64 * sizeof(uint8_t));
1325 ff_mpv_idct_init(s);
1326 if ((ret = ff_mpv_common_init(s)) < 0)
1329 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->idsp.idct_permutation);
1330 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->idsp.idct_permutation);
1331 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->idsp.idct_permutation);
1332 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->idsp.idct_permutation);
1334 s1->mpeg_enc_ctx_allocated = 1;
1339 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
1342 Mpeg1Context *s1 = avctx->priv_data;
1343 MpegEncContext *s = &s1->mpeg_enc_ctx;
1344 int ref, f_code, vbv_delay;
1346 init_get_bits(&s->gb, buf, buf_size * 8);
1348 ref = get_bits(&s->gb, 10); /* temporal ref */
1349 s->pict_type = get_bits(&s->gb, 3);
1350 if (s->pict_type == 0 || s->pict_type > 3)
1351 return AVERROR_INVALIDDATA;
1353 vbv_delay = get_bits(&s->gb, 16);
1354 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))
1359 return AVERROR_INVALIDDATA;
1360 s->mpeg_f_code[0][0] = f_code;
1361 s->mpeg_f_code[0][1] = f_code;
1363 if (s->pict_type == AV_PICTURE_TYPE_B) {
1364 s->full_pel[1] = get_bits1(&s->gb);
1365 f_code = get_bits(&s->gb, 3);
1366 if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
1367 return AVERROR_INVALIDDATA;
1368 s->mpeg_f_code[1][0] = f_code;
1369 s->mpeg_f_code[1][1] = f_code;
1371 s->current_picture.f->pict_type = s->pict_type;
1372 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1374 if (avctx->debug & FF_DEBUG_PICT_INFO)
1375 av_log(avctx, AV_LOG_DEBUG,
1376 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1383 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1385 MpegEncContext *s = &s1->mpeg_enc_ctx;
1386 int horiz_size_ext, vert_size_ext;
1389 skip_bits(&s->gb, 1); /* profile and level esc*/
1390 s->avctx->profile = get_bits(&s->gb, 3);
1391 s->avctx->level = get_bits(&s->gb, 4);
1392 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1393 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1394 horiz_size_ext = get_bits(&s->gb, 2);
1395 vert_size_ext = get_bits(&s->gb, 2);
1396 s->width |= (horiz_size_ext << 12);
1397 s->height |= (vert_size_ext << 12);
1398 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1399 s->bit_rate += (bit_rate_ext << 18) * 400;
1400 skip_bits1(&s->gb); /* marker */
1401 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1403 s->low_delay = get_bits1(&s->gb);
1404 if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
1407 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1408 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1410 ff_dlog(s->avctx, "sequence extension\n");
1411 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1413 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1414 av_log(s->avctx, AV_LOG_DEBUG,
1415 "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1416 s->avctx->profile, s->avctx->level,
1417 s->avctx->rc_buffer_size, s->bit_rate);
1420 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1422 MpegEncContext *s = &s1->mpeg_enc_ctx;
1423 int color_description, w, h;
1425 skip_bits(&s->gb, 3); /* video format */
1426 color_description = get_bits1(&s->gb);
1427 if (color_description) {
1428 s->avctx->color_primaries = get_bits(&s->gb, 8);
1429 s->avctx->color_trc = get_bits(&s->gb, 8);
1430 s->avctx->colorspace = get_bits(&s->gb, 8);
1432 w = get_bits(&s->gb, 14);
1433 skip_bits(&s->gb, 1); // marker
1434 h = get_bits(&s->gb, 14);
1435 // remaining 3 bits are zero padding
1437 s1->pan_scan.width = 16 * w;
1438 s1->pan_scan.height = 16 * h;
1440 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1441 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1444 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1446 MpegEncContext *s = &s1->mpeg_enc_ctx;
1450 if (s->progressive_sequence) {
1451 if (s->repeat_first_field) {
1453 if (s->top_field_first)
1457 if (s->picture_structure == PICT_FRAME) {
1459 if (s->repeat_first_field)
1463 for (i = 0; i < nofco; i++) {
1464 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1465 skip_bits(&s->gb, 1); // marker
1466 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1467 skip_bits(&s->gb, 1); // marker
1470 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1471 av_log(s->avctx, AV_LOG_DEBUG,
1472 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1473 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1474 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1475 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1478 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1479 uint16_t matrix1[64], int intra)
1483 for (i = 0; i < 64; i++) {
1484 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1485 int v = get_bits(&s->gb, 8);
1487 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1488 return AVERROR_INVALIDDATA;
1490 if (intra && i == 0 && v != 8) {
1491 av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1492 v = 8; // needed by pink.mpg / issue1046
1501 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1503 ff_dlog(s->avctx, "matrix extension\n");
1505 if (get_bits1(&s->gb))
1506 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1507 if (get_bits1(&s->gb))
1508 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1509 if (get_bits1(&s->gb))
1510 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
1511 if (get_bits1(&s->gb))
1512 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1515 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1517 MpegEncContext *s = &s1->mpeg_enc_ctx;
1519 s->full_pel[0] = s->full_pel[1] = 0;
1520 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1521 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1522 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1523 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1524 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1525 av_log(s->avctx, AV_LOG_ERROR,
1526 "Missing picture start code, guessing missing values\n");
1527 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1528 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1529 s->pict_type = AV_PICTURE_TYPE_I;
1531 s->pict_type = AV_PICTURE_TYPE_P;
1533 s->pict_type = AV_PICTURE_TYPE_B;
1534 s->current_picture.f->pict_type = s->pict_type;
1535 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1537 s->intra_dc_precision = get_bits(&s->gb, 2);
1538 s->picture_structure = get_bits(&s->gb, 2);
1539 s->top_field_first = get_bits1(&s->gb);
1540 s->frame_pred_frame_dct = get_bits1(&s->gb);
1541 s->concealment_motion_vectors = get_bits1(&s->gb);
1542 s->q_scale_type = get_bits1(&s->gb);
1543 s->intra_vlc_format = get_bits1(&s->gb);
1544 s->alternate_scan = get_bits1(&s->gb);
1545 s->repeat_first_field = get_bits1(&s->gb);
1546 s->chroma_420_type = get_bits1(&s->gb);
1547 s->progressive_frame = get_bits1(&s->gb);
1549 if (s->progressive_sequence && !s->progressive_frame) {
1550 s->progressive_frame = 1;
1551 av_log(s->avctx, AV_LOG_ERROR,
1552 "interlaced frame in progressive sequence, ignoring\n");
1555 if (s->picture_structure == 0 ||
1556 (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1557 av_log(s->avctx, AV_LOG_ERROR,
1558 "picture_structure %d invalid, ignoring\n",
1559 s->picture_structure);
1560 s->picture_structure = PICT_FRAME;
1563 if (s->progressive_sequence && !s->frame_pred_frame_dct)
1564 av_log(s->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
1566 if (s->picture_structure == PICT_FRAME) {
1568 s->v_edge_pos = 16 * s->mb_height;
1570 s->first_field ^= 1;
1571 s->v_edge_pos = 8 * s->mb_height;
1572 memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1575 if (s->alternate_scan) {
1576 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1577 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1579 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1580 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1583 /* composite display not parsed */
1584 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1585 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1586 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1587 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1588 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1589 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1590 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1591 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1592 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1595 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1597 AVCodecContext *avctx = s->avctx;
1598 Mpeg1Context *s1 = (Mpeg1Context *) s;
1601 /* start frame decoding */
1602 if (s->first_field || s->picture_structure == PICT_FRAME) {
1603 AVFrameSideData *pan_scan;
1605 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1608 ff_mpeg_er_frame_start(s);
1610 /* first check if we must repeat the frame */
1611 s->current_picture_ptr->f->repeat_pict = 0;
1612 if (s->repeat_first_field) {
1613 if (s->progressive_sequence) {
1614 if (s->top_field_first)
1615 s->current_picture_ptr->f->repeat_pict = 4;
1617 s->current_picture_ptr->f->repeat_pict = 2;
1618 } else if (s->progressive_frame) {
1619 s->current_picture_ptr->f->repeat_pict = 1;
1623 pan_scan = av_frame_new_side_data(s->current_picture_ptr->f,
1624 AV_FRAME_DATA_PANSCAN,
1625 sizeof(s1->pan_scan));
1627 return AVERROR(ENOMEM);
1628 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1630 if (s1->a53_caption) {
1631 AVFrameSideData *sd = av_frame_new_side_data(
1632 s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1633 s1->a53_caption_size);
1635 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1636 av_freep(&s1->a53_caption);
1639 if (s1->has_stereo3d) {
1640 AVStereo3D *stereo = av_stereo3d_create_side_data(s->current_picture_ptr->f);
1642 return AVERROR(ENOMEM);
1644 *stereo = s1->stereo3d;
1645 s1->has_stereo3d = 0;
1649 AVFrameSideData *sd =
1650 av_frame_new_side_data(s->current_picture_ptr->f,
1651 AV_FRAME_DATA_AFD, 1);
1653 return AVERROR(ENOMEM);
1655 *sd->data = s1->afd;
1659 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1660 ff_thread_finish_setup(avctx);
1661 } else { // second field
1664 if (!s->current_picture_ptr) {
1665 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1666 return AVERROR_INVALIDDATA;
1669 if (s->avctx->hwaccel &&
1670 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1671 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1672 av_log(avctx, AV_LOG_ERROR,
1673 "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)
1690 FF_DISABLE_DEPRECATION_WARNINGS
1691 // ff_mpv_frame_start will call this function too,
1692 // but we need to call it on every field
1693 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1694 if (ff_xvmc_field_start(s, avctx) < 0)
1696 FF_ENABLE_DEPRECATION_WARNINGS
1697 #endif /* FF_API_XVMC */
1702 #define DECODE_SLICE_ERROR -1
1703 #define DECODE_SLICE_OK 0
1707 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1708 * @return DECODE_SLICE_ERROR if the slice is damaged,
1709 * DECODE_SLICE_OK if this slice is OK
1711 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1712 const uint8_t **buf, int buf_size)
1714 AVCodecContext *avctx = s->avctx;
1715 const int field_pic = s->picture_structure != PICT_FRAME;
1719 s->resync_mb_y = -1;
1721 assert(mb_y < s->mb_height);
1723 init_get_bits(&s->gb, *buf, buf_size * 8);
1725 ff_mpeg1_clean_buffers(s);
1726 s->interlaced_dct = 0;
1728 s->qscale = get_qscale(s);
1730 if (s->qscale == 0) {
1731 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1732 return AVERROR_INVALIDDATA;
1735 /* extra slice info */
1736 while (get_bits1(&s->gb) != 0)
1737 skip_bits(&s->gb, 8);
1741 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1744 while (get_bits_left(&s->gb) > 0) {
1745 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1746 MBINCR_VLC_BITS, 2);
1748 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1749 return AVERROR_INVALIDDATA;
1754 /* otherwise, stuffing, nothing to do */
1762 if (s->mb_x >= (unsigned) s->mb_width) {
1763 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1764 return AVERROR_INVALIDDATA;
1767 if (avctx->hwaccel) {
1768 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1769 int start_code = -1;
1770 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1771 if (buf_end < *buf + buf_size)
1774 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1775 return DECODE_SLICE_ERROR;
1777 return DECODE_SLICE_OK;
1780 s->resync_mb_x = s->mb_x;
1781 s->resync_mb_y = s->mb_y = mb_y;
1783 ff_init_block_index(s);
1785 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1786 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1787 av_log(s->avctx, AV_LOG_DEBUG,
1788 "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",
1790 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1791 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1792 s->pict_type == AV_PICTURE_TYPE_I ? "I" :
1793 (s->pict_type == AV_PICTURE_TYPE_P ? "P" :
1794 (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1795 s->progressive_sequence ? "ps" : "",
1796 s->progressive_frame ? "pf" : "",
1797 s->alternate_scan ? "alt" : "",
1798 s->top_field_first ? "top" : "",
1799 s->intra_dc_precision, s->picture_structure,
1800 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1801 s->q_scale_type, s->intra_vlc_format,
1802 s->repeat_first_field, s->chroma_420_type ? "420" : "");
1808 FF_DISABLE_DEPRECATION_WARNINGS
1809 // If 1, we memcpy blocks in xvmcvideo.
1810 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1811 ff_xvmc_init_block(s); // set s->block
1812 FF_ENABLE_DEPRECATION_WARNINGS
1813 #endif /* FF_API_XVMC */
1815 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1818 // Note motion_val is normally NULL unless we want to extract the MVs.
1819 if (s->current_picture.motion_val[0] && !s->encoding) {
1820 const int wrap = s->b8_stride;
1821 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1822 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1823 int motion_x, motion_y, dir, i;
1825 for (i = 0; i < 2; i++) {
1826 for (dir = 0; dir < 2; dir++) {
1828 (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1829 motion_x = motion_y = 0;
1830 } else if (s->mv_type == MV_TYPE_16X16 ||
1831 (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1832 motion_x = s->mv[dir][0][0];
1833 motion_y = s->mv[dir][0][1];
1834 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1835 motion_x = s->mv[dir][i][0];
1836 motion_y = s->mv[dir][i][1];
1839 s->current_picture.motion_val[dir][xy][0] = motion_x;
1840 s->current_picture.motion_val[dir][xy][1] = motion_y;
1841 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1842 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1843 s->current_picture.ref_index [dir][b8_xy] =
1844 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1845 assert(s->field_select[dir][i] == 0 ||
1846 s->field_select[dir][i] == 1);
1854 s->dest[1] += 16 >> s->chroma_x_shift;
1855 s->dest[2] += 16 >> s->chroma_x_shift;
1857 ff_mpv_decode_mb(s, s->block);
1859 if (++s->mb_x >= s->mb_width) {
1860 const int mb_size = 16;
1862 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1863 ff_mpv_report_decode_progress(s);
1866 s->mb_y += 1 << field_pic;
1868 if (s->mb_y >= s->mb_height) {
1869 int left = get_bits_left(&s->gb);
1870 int is_d10 = s->chroma_format == 2 &&
1871 s->pict_type == AV_PICTURE_TYPE_I &&
1872 avctx->profile == 0 && avctx->level == 5 &&
1873 s->intra_dc_precision == 2 &&
1874 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1875 s->progressive_frame == 0
1876 /* vbv_delay == 0xBBB || 0xE10 */;
1879 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1880 ((avctx->err_recognition & AV_EF_BUFFER) && left > 8)) {
1881 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n",
1882 left, show_bits(&s->gb, FFMIN(left, 23)));
1883 return AVERROR_INVALIDDATA;
1888 ff_init_block_index(s);
1891 /* skip mb handling */
1892 if (s->mb_skip_run == -1) {
1893 /* read increment again */
1896 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1897 MBINCR_VLC_BITS, 2);
1899 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1900 return AVERROR_INVALIDDATA;
1904 s->mb_skip_run += 33;
1905 } else if (code == 35) {
1906 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1907 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1908 return AVERROR_INVALIDDATA;
1910 goto eos; /* end of slice */
1912 /* otherwise, stuffing, nothing to do */
1914 s->mb_skip_run += code;
1918 if (s->mb_skip_run) {
1920 if (s->pict_type == AV_PICTURE_TYPE_I) {
1921 av_log(s->avctx, AV_LOG_ERROR,
1922 "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1923 return AVERROR_INVALIDDATA;
1928 for (i = 0; i < 12; i++)
1929 s->block_last_index[i] = -1;
1930 if (s->picture_structure == PICT_FRAME)
1931 s->mv_type = MV_TYPE_16X16;
1933 s->mv_type = MV_TYPE_FIELD;
1934 if (s->pict_type == AV_PICTURE_TYPE_P) {
1935 /* if P type, zero motion vector is implied */
1936 s->mv_dir = MV_DIR_FORWARD;
1937 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1938 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1939 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1940 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1942 /* if B type, reuse previous vectors and directions */
1943 s->mv[0][0][0] = s->last_mv[0][0][0];
1944 s->mv[0][0][1] = s->last_mv[0][0][1];
1945 s->mv[1][0][0] = s->last_mv[1][0][0];
1946 s->mv[1][0][1] = s->last_mv[1][0][1];
1951 eos: // end of slice
1952 *buf += (get_bits_count(&s->gb) - 1) / 8;
1953 ff_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1957 static int slice_decode_thread(AVCodecContext *c, void *arg)
1959 MpegEncContext *s = *(void **) arg;
1960 const uint8_t *buf = s->gb.buffer;
1961 int mb_y = s->start_mb_y;
1962 const int field_pic = s->picture_structure != PICT_FRAME;
1964 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1967 uint32_t start_code;
1970 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1972 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1973 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1974 s->start_mb_y, s->end_mb_y, s->er.error_count);
1976 if (c->err_recognition & AV_EF_EXPLODE)
1978 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1979 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1981 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
1983 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1984 s->mb_x - 1, s->mb_y,
1985 ER_AC_END | ER_DC_END | ER_MV_END);
1988 if (s->mb_y == s->end_mb_y)
1992 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1993 mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
1994 if (s->picture_structure == PICT_BOTTOM_FIELD)
1996 if (mb_y < 0 || mb_y >= s->end_mb_y)
1997 return AVERROR_INVALIDDATA;
2002 * Handle slice ends.
2003 * @return 1 if it seems to be the last slice
2005 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2007 Mpeg1Context *s1 = avctx->priv_data;
2008 MpegEncContext *s = &s1->mpeg_enc_ctx;
2010 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2013 if (s->avctx->hwaccel) {
2014 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
2015 av_log(avctx, AV_LOG_ERROR,
2016 "hardware accelerator failed to decode picture\n");
2020 FF_DISABLE_DEPRECATION_WARNINGS
2021 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
2022 ff_xvmc_field_end(s);
2023 FF_ENABLE_DEPRECATION_WARNINGS
2024 #endif /* FF_API_XVMC */
2026 /* end of slice reached */
2027 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field) {
2030 ff_er_frame_end(&s->er);
2032 ff_mpv_frame_end(s);
2034 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2035 int ret = av_frame_ref(pict, s->current_picture_ptr->f);
2038 ff_print_debug_info(s, s->current_picture_ptr);
2040 if (avctx->active_thread_type & FF_THREAD_FRAME)
2041 s->picture_number++;
2042 /* latency of 1 frame for I- and P-frames */
2043 /* XXX: use another variable than picture_number */
2044 if (s->last_picture_ptr) {
2045 int ret = av_frame_ref(pict, s->last_picture_ptr->f);
2048 ff_print_debug_info(s, s->last_picture_ptr);
2058 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2059 const uint8_t *buf, int buf_size)
2061 Mpeg1Context *s1 = avctx->priv_data;
2062 MpegEncContext *s = &s1->mpeg_enc_ctx;
2066 init_get_bits(&s->gb, buf, buf_size * 8);
2068 width = get_bits(&s->gb, 12);
2069 height = get_bits(&s->gb, 12);
2070 if (width == 0 || height == 0) {
2071 av_log(avctx, AV_LOG_WARNING,
2072 "Invalid horizontal or vertical size value.\n");
2073 if (avctx->err_recognition & AV_EF_BITSTREAM)
2074 return AVERROR_INVALIDDATA;
2076 s->aspect_ratio_info = get_bits(&s->gb, 4);
2077 if (s->aspect_ratio_info == 0) {
2078 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2079 if (avctx->err_recognition & AV_EF_BITSTREAM)
2080 return AVERROR_INVALIDDATA;
2082 s->frame_rate_index = get_bits(&s->gb, 4);
2083 if (s->frame_rate_index == 0 || s->frame_rate_index > 13) {
2084 av_log(avctx, AV_LOG_WARNING,
2085 "frame_rate_index %d is invalid\n", s->frame_rate_index);
2086 return AVERROR_INVALIDDATA;
2088 s->bit_rate = get_bits(&s->gb, 18) * 400;
2089 if (get_bits1(&s->gb) == 0) { /* marker */
2090 av_log(avctx, AV_LOG_ERROR, "Marker in sequence header missing\n");
2091 return AVERROR_INVALIDDATA;
2096 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2097 skip_bits(&s->gb, 1);
2100 if (get_bits1(&s->gb)) {
2101 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2103 for (i = 0; i < 64; i++) {
2104 j = s->idsp.idct_permutation[i];
2105 v = ff_mpeg1_default_intra_matrix[i];
2106 s->intra_matrix[j] = v;
2107 s->chroma_intra_matrix[j] = v;
2110 if (get_bits1(&s->gb)) {
2111 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2113 for (i = 0; i < 64; i++) {
2114 int j = s->idsp.idct_permutation[i];
2115 v = ff_mpeg1_default_non_intra_matrix[i];
2116 s->inter_matrix[j] = v;
2117 s->chroma_inter_matrix[j] = v;
2121 if (show_bits(&s->gb, 23) != 0) {
2122 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2123 return AVERROR_INVALIDDATA;
2126 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
2127 s->progressive_sequence = 1;
2128 s->progressive_frame = 1;
2129 s->picture_structure = PICT_FRAME;
2130 s->frame_pred_frame_dct = 1;
2131 s->chroma_format = 1;
2133 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2134 s->out_format = FMT_MPEG1;
2135 if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
2138 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2139 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2140 s->avctx->rc_buffer_size, s->bit_rate);
2145 static int vcr2_init_sequence(AVCodecContext *avctx)
2147 Mpeg1Context *s1 = avctx->priv_data;
2148 MpegEncContext *s = &s1->mpeg_enc_ctx;
2151 /* start new MPEG-1 context decoding */
2152 s->out_format = FMT_MPEG1;
2153 if (s1->mpeg_enc_ctx_allocated) {
2154 ff_mpv_common_end(s);
2156 s->width = avctx->coded_width;
2157 s->height = avctx->coded_height;
2158 avctx->has_b_frames = 0; // true?
2161 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2164 if ((avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel) &&
2165 avctx->idct_algo == FF_IDCT_AUTO)
2167 if (avctx->hwaccel && avctx->idct_algo == FF_IDCT_AUTO)
2168 #endif /* FF_API_XVMC */
2169 avctx->idct_algo = FF_IDCT_SIMPLE;
2171 ff_mpv_idct_init(s);
2172 if ((ret = ff_mpv_common_init(s)) < 0)
2174 s1->mpeg_enc_ctx_allocated = 1;
2176 for (i = 0; i < 64; i++) {
2177 int j = s->idsp.idct_permutation[i];
2178 v = ff_mpeg1_default_intra_matrix[i];
2179 s->intra_matrix[j] = v;
2180 s->chroma_intra_matrix[j] = v;
2182 v = ff_mpeg1_default_non_intra_matrix[i];
2183 s->inter_matrix[j] = v;
2184 s->chroma_inter_matrix[j] = v;
2187 s->progressive_sequence = 1;
2188 s->progressive_frame = 1;
2189 s->picture_structure = PICT_FRAME;
2190 s->frame_pred_frame_dct = 1;
2191 s->chroma_format = 1;
2192 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2193 s1->save_width = s->width;
2194 s1->save_height = s->height;
2195 s1->save_progressive_seq = s->progressive_sequence;
2199 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2200 const uint8_t *p, int buf_size)
2202 Mpeg1Context *s1 = avctx->priv_data;
2204 if (buf_size >= 6 &&
2205 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2206 p[4] == 3 && (p[5] & 0x40)) {
2207 /* extract A53 Part 4 CC data */
2208 int cc_count = p[5] & 0x1f;
2209 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2210 av_freep(&s1->a53_caption);
2211 s1->a53_caption_size = cc_count * 3;
2212 s1->a53_caption = av_malloc(s1->a53_caption_size);
2213 if (s1->a53_caption)
2214 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2217 } else if (buf_size >= 11 &&
2218 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2219 /* extract DVD CC data */
2222 // There is a caption count field in the data, but it is often
2223 // incorect. So count the number of captions present.
2224 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2226 // Transform the DVD format into A53 Part 4 format
2228 av_freep(&s1->a53_caption);
2229 s1->a53_caption_size = cc_count * 6;
2230 s1->a53_caption = av_malloc(s1->a53_caption_size);
2231 if (s1->a53_caption) {
2232 uint8_t field1 = !!(p[4] & 0x80);
2233 uint8_t *cap = s1->a53_caption;
2235 for (i = 0; i < cc_count; i++) {
2236 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2239 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2252 static void mpeg_decode_user_data(AVCodecContext *avctx,
2253 const uint8_t *p, int buf_size)
2255 const uint8_t *buf_end = p + buf_size;
2256 Mpeg1Context *s1 = avctx->priv_data;
2258 /* we parse the DTG active format information */
2259 if (buf_end - p >= 5 &&
2260 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2268 if (buf_end - p < 1)
2271 FF_DISABLE_DEPRECATION_WARNINGS
2272 avctx->dtg_active_format = p[0] & 0x0f;
2273 FF_ENABLE_DEPRECATION_WARNINGS
2274 #endif /* FF_API_AFD */
2276 s1->afd = p[0] & 0x0f;
2278 } else if (buf_end - p >= 6 &&
2279 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2280 p[4] == 0x03) { // S3D_video_format_length
2281 // the 0x7F mask ignores the reserved_bit value
2282 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2284 if (S3D_video_format_type == 0x03 ||
2285 S3D_video_format_type == 0x04 ||
2286 S3D_video_format_type == 0x08 ||
2287 S3D_video_format_type == 0x23) {
2289 s1->has_stereo3d = 1;
2291 switch (S3D_video_format_type) {
2293 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE;
2296 s1->stereo3d.type = AV_STEREO3D_TOPBOTTOM;
2299 s1->stereo3d.type = AV_STEREO3D_2D;
2302 s1->stereo3d.type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2306 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2311 static void mpeg_decode_gop(AVCodecContext *avctx,
2312 const uint8_t *buf, int buf_size)
2314 Mpeg1Context *s1 = avctx->priv_data;
2315 MpegEncContext *s = &s1->mpeg_enc_ctx;
2317 int time_code_hours, time_code_minutes;
2318 int time_code_seconds, time_code_pictures;
2321 init_get_bits(&s->gb, buf, buf_size * 8);
2323 skip_bits1(&s->gb); /* drop_frame_flag */
2325 time_code_hours = get_bits(&s->gb, 5);
2326 time_code_minutes = get_bits(&s->gb, 6);
2327 skip_bits1(&s->gb); // marker bit
2328 time_code_seconds = get_bits(&s->gb, 6);
2329 time_code_pictures = get_bits(&s->gb, 6);
2331 s1->closed_gop = get_bits1(&s->gb);
2332 /* broken_link indicate that after editing the
2333 * reference frames of the first B-Frames after GOP I-Frame
2334 * are missing (open gop) */
2335 broken_link = get_bits1(&s->gb);
2337 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2338 av_log(s->avctx, AV_LOG_DEBUG,
2339 "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2340 time_code_hours, time_code_minutes, time_code_seconds,
2341 time_code_pictures, s1->closed_gop, broken_link);
2344 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2345 int *got_output, const uint8_t *buf, int buf_size)
2347 Mpeg1Context *s = avctx->priv_data;
2348 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2349 const uint8_t *buf_ptr = buf;
2350 const uint8_t *buf_end = buf + buf_size;
2351 int ret, input_size;
2352 int last_code = 0, skip_frame = 0;
2355 /* find next start code */
2356 uint32_t start_code = -1;
2357 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2358 if (start_code > 0x1ff) {
2361 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2365 avctx->execute(avctx, slice_decode_thread,
2366 &s2->thread_context[0], NULL,
2367 s->slice_count, sizeof(void *));
2368 for (i = 0; i < s->slice_count; i++)
2369 s2->er.error_count += s2->thread_context[i]->er.error_count;
2372 ret = slice_end(avctx, picture);
2376 // FIXME: merge with the stuff in mpeg_decode_slice
2377 if (s2->last_picture_ptr || s2->low_delay)
2382 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2385 input_size = buf_end - buf_ptr;
2387 if (avctx->debug & FF_DEBUG_STARTCODE)
2388 av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %td left %d\n",
2389 start_code, buf_ptr - buf, input_size);
2391 /* prepare data for next start code */
2392 switch (start_code) {
2393 case SEQ_START_CODE:
2394 if (last_code == 0) {
2395 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2398 av_log(avctx, AV_LOG_ERROR,
2399 "ignoring SEQ_START_CODE after %X\n", last_code);
2400 if (avctx->err_recognition & AV_EF_EXPLODE)
2401 return AVERROR_INVALIDDATA;
2405 case PICTURE_START_CODE:
2406 if (s2->width <= 0 || s2->height <= 0) {
2407 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2408 s2->width, s2->height);
2409 return AVERROR_INVALIDDATA;
2412 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2413 !avctx->hwaccel && s->slice_count) {
2416 avctx->execute(avctx, slice_decode_thread,
2417 s2->thread_context, NULL,
2418 s->slice_count, sizeof(void *));
2419 for (i = 0; i < s->slice_count; i++)
2420 s2->er.error_count += s2->thread_context[i]->er.error_count;
2423 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2424 ret = mpeg_decode_postinit(avctx);
2426 av_log(avctx, AV_LOG_ERROR,
2427 "mpeg_decode_postinit() failure\n");
2431 /* We have a complete image: we try to decompress it. */
2432 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2435 last_code = PICTURE_START_CODE;
2437 av_log(avctx, AV_LOG_ERROR,
2438 "ignoring pic after %X\n", last_code);
2439 if (avctx->err_recognition & AV_EF_EXPLODE)
2440 return AVERROR_INVALIDDATA;
2443 case EXT_START_CODE:
2444 init_get_bits(&s2->gb, buf_ptr, input_size * 8);
2446 switch (get_bits(&s2->gb, 4)) {
2448 if (last_code == 0) {
2449 mpeg_decode_sequence_extension(s);
2451 av_log(avctx, AV_LOG_ERROR,
2452 "ignoring seq ext after %X\n", last_code);
2453 if (avctx->err_recognition & AV_EF_EXPLODE)
2454 return AVERROR_INVALIDDATA;
2458 mpeg_decode_sequence_display_extension(s);
2461 mpeg_decode_quant_matrix_extension(s2);
2464 mpeg_decode_picture_display_extension(s);
2467 if (last_code == PICTURE_START_CODE) {
2468 mpeg_decode_picture_coding_extension(s);
2470 av_log(avctx, AV_LOG_ERROR,
2471 "ignoring pic cod ext after %X\n", last_code);
2472 if (avctx->err_recognition & AV_EF_EXPLODE)
2473 return AVERROR_INVALIDDATA;
2478 case USER_START_CODE:
2479 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2481 case GOP_START_CODE:
2482 if (last_code == 0) {
2483 s2->first_field = 0;
2484 mpeg_decode_gop(avctx, buf_ptr, input_size);
2487 av_log(avctx, AV_LOG_ERROR,
2488 "ignoring GOP_START_CODE after %X\n", last_code);
2489 if (avctx->err_recognition & AV_EF_EXPLODE)
2490 return AVERROR_INVALIDDATA;
2494 if (start_code >= SLICE_MIN_START_CODE &&
2495 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2496 const int field_pic = s2->picture_structure != PICT_FRAME;
2497 int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
2498 last_code = SLICE_MIN_START_CODE;
2500 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2503 if (mb_y >= s2->mb_height) {
2504 av_log(s2->avctx, AV_LOG_ERROR,
2505 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2506 return AVERROR_INVALIDDATA;
2509 if (!s2->last_picture_ptr) {
2510 /* Skip B-frames if we do not have reference frames and
2511 * GOP is not closed. */
2512 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2513 if (!s->closed_gop) {
2519 if (s2->pict_type == AV_PICTURE_TYPE_I)
2521 if (!s2->next_picture_ptr) {
2522 /* Skip P-frames if we do not have a reference frame or
2523 * we have an invalid header. */
2524 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2529 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2530 s2->pict_type == AV_PICTURE_TYPE_B) ||
2531 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2532 s2->pict_type != AV_PICTURE_TYPE_I) ||
2533 avctx->skip_frame >= AVDISCARD_ALL) {
2538 if (!s->mpeg_enc_ctx_allocated)
2541 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2542 if (mb_y < avctx->skip_top ||
2543 mb_y >= s2->mb_height - avctx->skip_bottom)
2547 if (!s2->pict_type) {
2548 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2549 if (avctx->err_recognition & AV_EF_EXPLODE)
2550 return AVERROR_INVALIDDATA;
2554 if (s->first_slice) {
2557 if ((ret = mpeg_field_start(s2, buf, buf_size)) < 0)
2560 if (!s2->current_picture_ptr) {
2561 av_log(avctx, AV_LOG_ERROR,
2562 "current_picture not initialized\n");
2563 return AVERROR_INVALIDDATA;
2567 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2569 int threshold = (s2->mb_height * s->slice_count +
2570 s2->slice_context_count / 2) /
2571 s2->slice_context_count;
2572 if (threshold <= mb_y) {
2573 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2575 thread_context->start_mb_y = mb_y;
2576 thread_context->end_mb_y = s2->mb_height;
2577 if (s->slice_count) {
2578 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2579 ret = ff_update_duplicate_context(thread_context, s2);
2583 init_get_bits(&thread_context->gb, buf_ptr, input_size * 8);
2586 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2588 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2592 if (avctx->err_recognition & AV_EF_EXPLODE)
2594 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2595 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2596 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2597 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2599 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2600 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2601 ER_AC_END | ER_DC_END | ER_MV_END);
2610 static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
2611 int *got_output, AVPacket *avpkt)
2613 const uint8_t *buf = avpkt->data;
2614 int buf_size = avpkt->size;
2615 Mpeg1Context *s = avctx->priv_data;
2616 AVFrame *picture = data;
2617 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2618 ff_dlog(avctx, "fill_buffer\n");
2620 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2621 /* special case for last picture */
2622 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2623 int ret = av_frame_ref(picture, s2->next_picture_ptr->f);
2627 s2->next_picture_ptr = NULL;
2634 if (s2->avctx->flags & CODEC_FLAG_TRUNCATED) {
2635 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
2638 if (ff_combine_frame(&s2->parse_context, next,
2639 (const uint8_t **) &buf, &buf_size) < 0)
2643 if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
2644 vcr2_init_sequence(avctx);
2648 if (avctx->extradata && !s->extradata_decoded) {
2649 int ret = decode_chunks(avctx, picture, got_output,
2650 avctx->extradata, avctx->extradata_size);
2651 s->extradata_decoded = 1;
2652 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2656 return decode_chunks(avctx, picture, got_output, buf, buf_size);
2659 static void flush(AVCodecContext *avctx)
2661 Mpeg1Context *s = avctx->priv_data;
2666 ff_mpeg_flush(avctx);
2669 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2671 Mpeg1Context *s = avctx->priv_data;
2673 if (s->mpeg_enc_ctx_allocated)
2674 ff_mpv_common_end(&s->mpeg_enc_ctx);
2675 av_freep(&s->a53_caption);
2679 static const AVProfile mpeg2_video_profiles[] = {
2680 { FF_PROFILE_MPEG2_422, "4:2:2" },
2681 { FF_PROFILE_MPEG2_HIGH, "High" },
2682 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2683 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2684 { FF_PROFILE_MPEG2_MAIN, "Main" },
2685 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2686 { FF_PROFILE_RESERVED, "Reserved" },
2687 { FF_PROFILE_RESERVED, "Reserved" },
2688 { FF_PROFILE_UNKNOWN },
2691 AVCodec ff_mpeg1video_decoder = {
2692 .name = "mpeg1video",
2693 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2694 .type = AVMEDIA_TYPE_VIDEO,
2695 .id = AV_CODEC_ID_MPEG1VIDEO,
2696 .priv_data_size = sizeof(Mpeg1Context),
2697 .init = mpeg_decode_init,
2698 .close = mpeg_decode_end,
2699 .decode = mpeg_decode_frame,
2700 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2701 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2702 CODEC_CAP_SLICE_THREADS,
2704 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2707 AVCodec ff_mpeg2video_decoder = {
2708 .name = "mpeg2video",
2709 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2710 .type = AVMEDIA_TYPE_VIDEO,
2711 .id = AV_CODEC_ID_MPEG2VIDEO,
2712 .priv_data_size = sizeof(Mpeg1Context),
2713 .init = mpeg_decode_init,
2714 .close = mpeg_decode_end,
2715 .decode = mpeg_decode_frame,
2716 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2717 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2718 CODEC_CAP_SLICE_THREADS,
2720 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2724 #if CONFIG_MPEG_XVMC_DECODER
2725 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2727 if (avctx->active_thread_type & FF_THREAD_SLICE)
2729 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2731 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2732 ff_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2734 mpeg_decode_init(avctx);
2736 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2737 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2742 AVCodec ff_mpeg_xvmc_decoder = {
2743 .name = "mpegvideo_xvmc",
2744 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2745 .type = AVMEDIA_TYPE_VIDEO,
2746 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2747 .priv_data_size = sizeof(Mpeg1Context),
2748 .init = mpeg_mc_decode_init,
2749 .close = mpeg_decode_end,
2750 .decode = mpeg_decode_frame,
2751 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2752 CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2757 #endif /* FF_API_XVMC */