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 #include "libavutil/attributes.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/stereo3d.h"
34 #include "mpegvideo.h"
35 #include "error_resilience.h"
37 #include "mpeg12data.h"
38 #include "bytestream.h"
39 #include "vdpau_internal.h"
40 #include "xvmc_internal.h"
44 typedef struct Mpeg1Context {
45 MpegEncContext mpeg_enc_ctx;
46 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
47 int repeat_field; /* true if we must repeat the field */
48 AVPanScan pan_scan; /**< some temporary storage for the panscan */
53 int save_width, save_height, save_progressive_seq;
54 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
55 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
58 int extradata_decoded;
61 #define MB_TYPE_ZERO_MV 0x20000000
63 static const uint32_t ptype2mb_type[7] = {
65 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
67 MB_TYPE_L0 | MB_TYPE_CBP,
68 MB_TYPE_QUANT | MB_TYPE_INTRA,
69 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
70 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
73 static const uint32_t btype2mb_type[11] = {
76 MB_TYPE_L1 | MB_TYPE_CBP,
78 MB_TYPE_L0 | MB_TYPE_CBP,
80 MB_TYPE_L0L1 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_INTRA,
82 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
83 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
84 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
87 static const uint8_t non_linear_qscale[32] = {
88 0, 1, 2, 3, 4, 5, 6, 7,
89 8,10,12,14,16,18,20,22,
90 24,28,32,36,40,44,48,52,
91 56,64,72,80,88,96,104,112,
94 /* as H.263, but only 17 codes */
95 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
97 int code, sign, val, shift;
99 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
107 sign = get_bits1(&s->gb);
111 val = (val - 1) << shift;
112 val |= get_bits(&s->gb, shift);
119 /* modulo decoding */
120 return sign_extend(val, 5 + shift);
123 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
125 int level, dc, diff, i, j, run;
127 RLTable *rl = &ff_rl_mpeg1;
128 uint8_t * const scantable = s->intra_scantable.permutated;
129 const uint16_t *quant_matrix = s->intra_matrix;
130 const int qscale = s->qscale;
133 component = (n <= 3 ? 0 : n - 4 + 1);
134 diff = decode_dc(&s->gb, component);
137 dc = s->last_dc[component];
139 s->last_dc[component] = dc;
140 block[0] = dc * quant_matrix[0];
141 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
144 OPEN_READER(re, &s->gb);
145 /* now quantify & encode AC coefficients */
147 UPDATE_CACHE(re, &s->gb);
148 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
152 } else if (level != 0) {
155 level = (level * qscale * quant_matrix[j]) >> 4;
156 level = (level - 1) | 1;
157 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
158 LAST_SKIP_BITS(re, &s->gb, 1);
161 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
162 UPDATE_CACHE(re, &s->gb);
163 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
165 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
166 } else if (level == 0) {
167 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
173 level = (level * qscale * quant_matrix[j]) >> 4;
174 level = (level - 1) | 1;
177 level = (level * qscale * quant_matrix[j]) >> 4;
178 level = (level - 1) | 1;
182 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
188 CLOSE_READER(re, &s->gb);
190 s->block_last_index[n] = i;
194 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
196 return mpeg1_decode_block_intra(s, block, n);
199 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
201 int level, i, j, run;
202 RLTable *rl = &ff_rl_mpeg1;
203 uint8_t * const scantable = s->intra_scantable.permutated;
204 const uint16_t *quant_matrix = s->inter_matrix;
205 const int qscale = s->qscale;
208 OPEN_READER(re, &s->gb);
210 // special case for first coefficient, no need to add second VLC table
211 UPDATE_CACHE(re, &s->gb);
212 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
213 level = (3 * qscale * quant_matrix[0]) >> 5;
214 level = (level - 1) | 1;
215 if (GET_CACHE(re, &s->gb) & 0x40000000)
219 SKIP_BITS(re, &s->gb, 2);
220 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
223 /* now quantify & encode AC coefficients */
225 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
230 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
231 level = (level - 1) | 1;
232 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
233 SKIP_BITS(re, &s->gb, 1);
236 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
237 UPDATE_CACHE(re, &s->gb);
238 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
240 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
241 } else if (level == 0) {
242 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
248 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
249 level = (level - 1) | 1;
252 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
253 level = (level - 1) | 1;
257 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
262 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
264 UPDATE_CACHE(re, &s->gb);
267 LAST_SKIP_BITS(re, &s->gb, 2);
268 CLOSE_READER(re, &s->gb);
270 s->block_last_index[n] = i;
275 * Note: this function can read out of range and crash for corrupt streams.
276 * Changing this would eat up any speed benefits it has.
277 * Do not use "fast" flag if you need the code to be robust.
279 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
281 int level, i, j, run;
282 RLTable *rl = &ff_rl_mpeg1;
283 uint8_t * const scantable = s->intra_scantable.permutated;
284 const int qscale = s->qscale;
287 OPEN_READER(re, &s->gb);
289 // special case for first coefficient, no need to add second VLC table
290 UPDATE_CACHE(re, &s->gb);
291 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
292 level = (3 * qscale) >> 1;
293 level = (level - 1) | 1;
294 if (GET_CACHE(re, &s->gb) & 0x40000000)
298 SKIP_BITS(re, &s->gb, 2);
299 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
303 /* now quantify & encode AC coefficients */
305 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
310 level = ((level * 2 + 1) * qscale) >> 1;
311 level = (level - 1) | 1;
312 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
313 SKIP_BITS(re, &s->gb, 1);
316 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
317 UPDATE_CACHE(re, &s->gb);
318 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
320 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
321 } else if (level == 0) {
322 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
328 level = ((level * 2 + 1) * qscale) >> 1;
329 level = (level - 1) | 1;
332 level = ((level * 2 + 1) * qscale) >> 1;
333 level = (level - 1) | 1;
338 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
340 UPDATE_CACHE(re, &s->gb);
343 LAST_SKIP_BITS(re, &s->gb, 2);
344 CLOSE_READER(re, &s->gb);
346 s->block_last_index[n] = i;
351 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
353 int level, i, j, run;
354 RLTable *rl = &ff_rl_mpeg1;
355 uint8_t * const scantable = s->intra_scantable.permutated;
356 const uint16_t *quant_matrix;
357 const int qscale = s->qscale;
363 OPEN_READER(re, &s->gb);
366 quant_matrix = s->inter_matrix;
368 quant_matrix = s->chroma_inter_matrix;
370 // special case for first coefficient, no need to add second VLC table
371 UPDATE_CACHE(re, &s->gb);
372 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
373 level= (3 * qscale * quant_matrix[0]) >> 5;
374 if (GET_CACHE(re, &s->gb) & 0x40000000)
379 SKIP_BITS(re, &s->gb, 2);
380 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
384 /* now quantify & encode AC coefficients */
386 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
391 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
392 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
393 SKIP_BITS(re, &s->gb, 1);
396 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
397 UPDATE_CACHE(re, &s->gb);
398 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
403 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
406 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
410 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
416 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
418 UPDATE_CACHE(re, &s->gb);
421 LAST_SKIP_BITS(re, &s->gb, 2);
422 CLOSE_READER(re, &s->gb);
424 block[63] ^= (mismatch & 1);
426 s->block_last_index[n] = i;
431 * Note: this function can read out of range and crash for corrupt streams.
432 * Changing this would eat up any speed benefits it has.
433 * Do not use "fast" flag if you need the code to be robust.
435 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
436 int16_t *block, int n)
438 int level, i, j, run;
439 RLTable *rl = &ff_rl_mpeg1;
440 uint8_t * const scantable = s->intra_scantable.permutated;
441 const int qscale = s->qscale;
442 OPEN_READER(re, &s->gb);
445 // special case for first coefficient, no need to add second VLC table
446 UPDATE_CACHE(re, &s->gb);
447 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
448 level = (3 * qscale) >> 1;
449 if (GET_CACHE(re, &s->gb) & 0x40000000)
453 SKIP_BITS(re, &s->gb, 2);
454 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
458 /* now quantify & encode AC coefficients */
460 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
465 level = ((level * 2 + 1) * qscale) >> 1;
466 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
467 SKIP_BITS(re, &s->gb, 1);
470 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
471 UPDATE_CACHE(re, &s->gb);
472 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
477 level = ((-level * 2 + 1) * qscale) >> 1;
480 level = ((level * 2 + 1) * qscale) >> 1;
485 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
487 UPDATE_CACHE(re, &s->gb);
490 LAST_SKIP_BITS(re, &s->gb, 2);
491 CLOSE_READER(re, &s->gb);
492 s->block_last_index[n] = i;
497 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
499 int level, dc, diff, i, j, run;
502 uint8_t * const scantable = s->intra_scantable.permutated;
503 const uint16_t *quant_matrix;
504 const int qscale = s->qscale;
509 quant_matrix = s->intra_matrix;
512 quant_matrix = s->chroma_intra_matrix;
513 component = (n & 1) + 1;
515 diff = decode_dc(&s->gb, component);
518 dc = s->last_dc[component];
520 s->last_dc[component] = dc;
521 block[0] = dc << (3 - s->intra_dc_precision);
522 av_dlog(s->avctx, "dc=%d\n", block[0]);
523 mismatch = block[0] ^ 1;
525 if (s->intra_vlc_format)
531 OPEN_READER(re, &s->gb);
532 /* now quantify & encode AC coefficients */
534 UPDATE_CACHE(re, &s->gb);
535 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
539 } else if (level != 0) {
542 level = (level * qscale * quant_matrix[j]) >> 4;
543 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
544 LAST_SKIP_BITS(re, &s->gb, 1);
547 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
548 UPDATE_CACHE(re, &s->gb);
549 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
553 level = (-level * qscale * quant_matrix[j]) >> 4;
556 level = (level * qscale * quant_matrix[j]) >> 4;
560 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
567 CLOSE_READER(re, &s->gb);
569 block[63] ^= mismatch & 1;
571 s->block_last_index[n] = i;
576 * Note: this function can read out of range and crash for corrupt streams.
577 * Changing this would eat up any speed benefits it has.
578 * Do not use "fast" flag if you need the code to be robust.
580 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
582 int level, dc, diff, j, run;
585 uint8_t * scantable = s->intra_scantable.permutated;
586 const uint16_t *quant_matrix;
587 const int qscale = s->qscale;
591 quant_matrix = s->intra_matrix;
594 quant_matrix = s->chroma_intra_matrix;
595 component = (n & 1) + 1;
597 diff = decode_dc(&s->gb, component);
600 dc = s->last_dc[component];
602 s->last_dc[component] = dc;
603 block[0] = dc << (3 - s->intra_dc_precision);
604 if (s->intra_vlc_format)
610 OPEN_READER(re, &s->gb);
611 /* now quantify & encode AC coefficients */
613 UPDATE_CACHE(re, &s->gb);
614 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
618 } else if (level != 0) {
621 level = (level * qscale * quant_matrix[j]) >> 4;
622 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
623 LAST_SKIP_BITS(re, &s->gb, 1);
626 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
627 UPDATE_CACHE(re, &s->gb);
628 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
632 level = (-level * qscale * quant_matrix[j]) >> 4;
635 level = (level * qscale * quant_matrix[j]) >> 4;
641 CLOSE_READER(re, &s->gb);
644 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
648 /******************************************/
651 static inline int get_dmv(MpegEncContext *s)
653 if (get_bits1(&s->gb))
654 return 1 - (get_bits1(&s->gb) << 1);
659 static inline int get_qscale(MpegEncContext *s)
661 int qscale = get_bits(&s->gb, 5);
662 if (s->q_scale_type) {
663 return non_linear_qscale[qscale];
670 /* motion type (for MPEG-2) */
676 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
678 int i, j, k, cbp, val, mb_type, motion_type;
679 const int mb_block_count = 4 + (1 << s->chroma_format);
681 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
683 av_assert2(s->mb_skipped == 0);
685 if (s->mb_skip_run-- != 0) {
686 if (s->pict_type == AV_PICTURE_TYPE_P) {
688 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
693 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
695 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
696 if (IS_INTRA(mb_type)) {
697 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
700 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
701 mb_type | MB_TYPE_SKIP;
703 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
710 switch (s->pict_type) {
712 case AV_PICTURE_TYPE_I:
713 if (get_bits1(&s->gb) == 0) {
714 if (get_bits1(&s->gb) == 0) {
715 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
718 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
720 mb_type = MB_TYPE_INTRA;
723 case AV_PICTURE_TYPE_P:
724 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
726 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
729 mb_type = ptype2mb_type[mb_type];
731 case AV_PICTURE_TYPE_B:
732 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
734 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
737 mb_type = btype2mb_type[mb_type];
740 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
741 // motion_type = 0; /* avoid warning */
742 if (IS_INTRA(mb_type)) {
743 s->dsp.clear_blocks(s->block[0]);
745 if (!s->chroma_y_shift) {
746 s->dsp.clear_blocks(s->block[6]);
749 /* compute DCT type */
750 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
751 !s->frame_pred_frame_dct) {
752 s->interlaced_dct = get_bits1(&s->gb);
755 if (IS_QUANT(mb_type))
756 s->qscale = get_qscale(s);
758 if (s->concealment_motion_vectors) {
759 /* just parse them */
760 if (s->picture_structure != PICT_FRAME)
761 skip_bits1(&s->gb); /* field select */
763 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
764 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
765 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
766 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
768 skip_bits1(&s->gb); /* marker */
770 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
772 // if 1, we memcpy blocks in xvmcvideo
773 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
774 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
777 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
778 if (s->flags2 & CODEC_FLAG2_FAST) {
779 for (i = 0; i < 6; i++) {
780 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
783 for (i = 0; i < mb_block_count; i++) {
784 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
789 for (i = 0; i < 6; i++) {
790 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
795 if (mb_type & MB_TYPE_ZERO_MV) {
796 av_assert2(mb_type & MB_TYPE_CBP);
798 s->mv_dir = MV_DIR_FORWARD;
799 if (s->picture_structure == PICT_FRAME) {
800 if (s->picture_structure == PICT_FRAME
801 && !s->frame_pred_frame_dct)
802 s->interlaced_dct = get_bits1(&s->gb);
803 s->mv_type = MV_TYPE_16X16;
805 s->mv_type = MV_TYPE_FIELD;
806 mb_type |= MB_TYPE_INTERLACED;
807 s->field_select[0][0] = s->picture_structure - 1;
810 if (IS_QUANT(mb_type))
811 s->qscale = get_qscale(s);
813 s->last_mv[0][0][0] = 0;
814 s->last_mv[0][0][1] = 0;
815 s->last_mv[0][1][0] = 0;
816 s->last_mv[0][1][1] = 0;
820 av_assert2(mb_type & MB_TYPE_L0L1);
821 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
822 /* get additional motion vector type */
823 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
824 motion_type = MT_FRAME;
826 motion_type = get_bits(&s->gb, 2);
827 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
828 s->interlaced_dct = get_bits1(&s->gb);
831 if (IS_QUANT(mb_type))
832 s->qscale = get_qscale(s);
835 s->mv_dir = (mb_type >> 13) & 3;
836 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
837 switch (motion_type) {
838 case MT_FRAME: /* or MT_16X8 */
839 if (s->picture_structure == PICT_FRAME) {
840 mb_type |= MB_TYPE_16x16;
841 s->mv_type = MV_TYPE_16X16;
842 for (i = 0; i < 2; i++) {
843 if (USES_LIST(mb_type, i)) {
845 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
846 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
847 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
848 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
849 /* full_pel: only for MPEG-1 */
850 if (s->full_pel[i]) {
851 s->mv[i][0][0] <<= 1;
852 s->mv[i][0][1] <<= 1;
857 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
858 s->mv_type = MV_TYPE_16X8;
859 for (i = 0; i < 2; i++) {
860 if (USES_LIST(mb_type, i)) {
862 for (j = 0; j < 2; j++) {
863 s->field_select[i][j] = get_bits1(&s->gb);
864 for (k = 0; k < 2; k++) {
865 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
866 s->last_mv[i][j][k]);
867 s->last_mv[i][j][k] = val;
868 s->mv[i][j][k] = val;
876 s->mv_type = MV_TYPE_FIELD;
877 if (s->picture_structure == PICT_FRAME) {
878 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
879 for (i = 0; i < 2; i++) {
880 if (USES_LIST(mb_type, i)) {
881 for (j = 0; j < 2; j++) {
882 s->field_select[i][j] = get_bits1(&s->gb);
883 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
884 s->last_mv[i][j][0]);
885 s->last_mv[i][j][0] = val;
886 s->mv[i][j][0] = val;
887 av_dlog(s->avctx, "fmx=%d\n", val);
888 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
889 s->last_mv[i][j][1] >> 1);
890 s->last_mv[i][j][1] = val << 1;
891 s->mv[i][j][1] = val;
892 av_dlog(s->avctx, "fmy=%d\n", val);
897 av_assert0(!s->progressive_sequence);
898 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
899 for (i = 0; i < 2; i++) {
900 if (USES_LIST(mb_type, i)) {
901 s->field_select[i][0] = get_bits1(&s->gb);
902 for (k = 0; k < 2; k++) {
903 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
904 s->last_mv[i][0][k]);
905 s->last_mv[i][0][k] = val;
906 s->last_mv[i][1][k] = val;
907 s->mv[i][0][k] = val;
914 if(s->progressive_sequence){
915 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
918 s->mv_type = MV_TYPE_DMV;
919 for (i = 0; i < 2; i++) {
920 if (USES_LIST(mb_type, i)) {
921 int dmx, dmy, mx, my, m;
922 const int my_shift = s->picture_structure == PICT_FRAME;
924 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
925 s->last_mv[i][0][0]);
926 s->last_mv[i][0][0] = mx;
927 s->last_mv[i][1][0] = mx;
929 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
930 s->last_mv[i][0][1] >> my_shift);
934 s->last_mv[i][0][1] = my << my_shift;
935 s->last_mv[i][1][1] = my << my_shift;
939 s->mv[i][1][0] = mx; // not used
940 s->mv[i][1][1] = my; // not used
942 if (s->picture_structure == PICT_FRAME) {
943 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
945 // m = 1 + 2 * s->top_field_first;
946 m = s->top_field_first ? 1 : 3;
948 /* top -> top pred */
949 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
950 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
952 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
953 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
955 mb_type |= MB_TYPE_16x16;
957 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
958 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
959 if (s->picture_structure == PICT_TOP_FIELD)
968 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
974 if (HAS_CBP(mb_type)) {
975 s->dsp.clear_blocks(s->block[0]);
977 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
978 if (mb_block_count > 6) {
979 cbp <<= mb_block_count - 6;
980 cbp |= get_bits(&s->gb, mb_block_count - 6);
981 s->dsp.clear_blocks(s->block[6]);
984 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
988 //if 1, we memcpy blocks in xvmcvideo
989 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
990 ff_xvmc_pack_pblocks(s, cbp);
993 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
994 if (s->flags2 & CODEC_FLAG2_FAST) {
995 for (i = 0; i < 6; i++) {
997 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
999 s->block_last_index[i] = -1;
1004 cbp <<= 12-mb_block_count;
1006 for (i = 0; i < mb_block_count; i++) {
1007 if (cbp & (1 << 11)) {
1008 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1011 s->block_last_index[i] = -1;
1017 if (s->flags2 & CODEC_FLAG2_FAST) {
1018 for (i = 0; i < 6; i++) {
1020 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1022 s->block_last_index[i] = -1;
1027 for (i = 0; i < 6; i++) {
1029 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1032 s->block_last_index[i] = -1;
1039 for (i = 0; i < 12; i++)
1040 s->block_last_index[i] = -1;
1044 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1049 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1051 Mpeg1Context *s = avctx->priv_data;
1052 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1055 /* we need some permutation to store matrices,
1056 * until MPV_common_init() sets the real permutation. */
1057 for (i = 0; i < 64; i++)
1058 s2->dsp.idct_permutation[i]=i;
1060 ff_MPV_decode_defaults(s2);
1062 s->mpeg_enc_ctx.avctx = avctx;
1063 s->mpeg_enc_ctx.flags = avctx->flags;
1064 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1065 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1066 ff_mpeg12_init_vlcs();
1068 s->mpeg_enc_ctx_allocated = 0;
1069 s->mpeg_enc_ctx.picture_number = 0;
1070 s->repeat_field = 0;
1071 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1072 avctx->color_range = AVCOL_RANGE_MPEG;
1073 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1074 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1076 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1080 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1082 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1083 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1086 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1089 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1090 if (err) return err;
1092 if (!ctx->mpeg_enc_ctx_allocated)
1093 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1095 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1096 s->picture_number++;
1101 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1102 const uint8_t *new_perm)
1104 uint16_t temp_matrix[64];
1107 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1109 for (i = 0; i < 64; i++) {
1110 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1114 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1115 #if CONFIG_MPEG1_XVMC_HWACCEL
1118 #if CONFIG_MPEG1_VDPAU_HWACCEL
1119 AV_PIX_FMT_VDPAU_MPEG1,
1126 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1127 #if CONFIG_MPEG2_XVMC_HWACCEL
1130 #if CONFIG_MPEG2_VDPAU_HWACCEL
1131 AV_PIX_FMT_VDPAU_MPEG2,
1134 #if CONFIG_MPEG2_DXVA2_HWACCEL
1135 AV_PIX_FMT_DXVA2_VLD,
1137 #if CONFIG_MPEG2_VAAPI_HWACCEL
1138 AV_PIX_FMT_VAAPI_VLD,
1144 static inline int uses_vdpau(AVCodecContext *avctx) {
1145 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1148 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1150 Mpeg1Context *s1 = avctx->priv_data;
1151 MpegEncContext *s = &s1->mpeg_enc_ctx;
1153 if(s->chroma_format < 2) {
1154 return ff_thread_get_format(avctx,
1155 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1156 mpeg1_hwaccel_pixfmt_list_420 :
1157 mpeg2_hwaccel_pixfmt_list_420);
1158 } else if(s->chroma_format == 2)
1159 return AV_PIX_FMT_YUV422P;
1161 return AV_PIX_FMT_YUV444P;
1164 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1166 avctx->hwaccel = ff_find_hwaccel(avctx);
1167 // until then pix_fmt may be changed right after codec init
1168 if (avctx->hwaccel || uses_vdpau(avctx))
1169 if (avctx->idct_algo == FF_IDCT_AUTO)
1170 avctx->idct_algo = FF_IDCT_SIMPLE;
1172 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1173 Mpeg1Context *s1 = avctx->priv_data;
1174 MpegEncContext *s = &s1->mpeg_enc_ctx;
1176 s->pack_pblocks = 1;
1178 avctx->xvmc_acceleration = 2;
1179 #endif /* FF_API_XVMC */
1183 /* Call this function when we know all parameters.
1184 * It may be called in different places for MPEG-1 and MPEG-2. */
1185 static int mpeg_decode_postinit(AVCodecContext *avctx)
1187 Mpeg1Context *s1 = avctx->priv_data;
1188 MpegEncContext *s = &s1->mpeg_enc_ctx;
1189 uint8_t old_permutation[64];
1192 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1193 avctx->coded_width != s->width ||
1194 avctx->coded_height != s->height ||
1195 s1->save_width != s->width ||
1196 s1->save_height != s->height ||
1197 s1->save_aspect_info != s->aspect_ratio_info ||
1198 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1202 if (s1->mpeg_enc_ctx_allocated) {
1203 ParseContext pc = s->parse_context;
1204 s->parse_context.buffer = 0;
1205 ff_MPV_common_end(s);
1206 s->parse_context = pc;
1207 s1->mpeg_enc_ctx_allocated = 0;
1210 if ((s->width == 0) || (s->height == 0))
1213 ret = ff_set_dimensions(avctx, s->width, s->height);
1217 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1218 avctx->rc_max_rate = s->bit_rate;
1219 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1220 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1221 avctx->bit_rate = s->bit_rate;
1223 s1->save_aspect_info = s->aspect_ratio_info;
1224 s1->save_width = s->width;
1225 s1->save_height = s->height;
1226 s1->save_progressive_seq = s->progressive_sequence;
1228 /* low_delay may be forced, in this case we will have B-frames
1229 * that behave like P-frames. */
1230 avctx->has_b_frames = !s->low_delay;
1232 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1234 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1235 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1237 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1238 avctx->ticks_per_frame=1;
1241 av_reduce(&s->avctx->time_base.den,
1242 &s->avctx->time_base.num,
1243 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1244 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1246 avctx->ticks_per_frame = 2;
1248 if (s->aspect_ratio_info > 1) {
1250 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1251 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1252 (AVRational) {s->width, s->height});
1254 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1255 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1256 // issue1613, 621, 562
1257 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1258 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1259 s->avctx->sample_aspect_ratio =
1260 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1261 (AVRational) {s->width, s->height});
1263 s->avctx->sample_aspect_ratio =
1264 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1265 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1266 //issue1613 4/3 16/9 -> 16/9
1267 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1268 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1269 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1270 av_dlog(avctx, "A %d/%d\n",
1271 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1272 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1273 s->avctx->sample_aspect_ratio.den);
1276 s->avctx->sample_aspect_ratio =
1277 ff_mpeg2_aspect[s->aspect_ratio_info];
1281 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1282 setup_hwaccel_for_pixfmt(avctx);
1284 /* Quantization matrices may need reordering
1285 * if DCT permutation is changed. */
1286 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1288 if (ff_MPV_common_init(s) < 0)
1291 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1292 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1293 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1294 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1296 s1->mpeg_enc_ctx_allocated = 1;
1301 static int mpeg1_decode_picture(AVCodecContext *avctx,
1302 const uint8_t *buf, int buf_size)
1304 Mpeg1Context *s1 = avctx->priv_data;
1305 MpegEncContext *s = &s1->mpeg_enc_ctx;
1306 int ref, f_code, vbv_delay;
1308 init_get_bits(&s->gb, buf, buf_size*8);
1310 ref = get_bits(&s->gb, 10); /* temporal ref */
1311 s->pict_type = get_bits(&s->gb, 3);
1312 if (s->pict_type == 0 || s->pict_type > 3)
1315 vbv_delay = get_bits(&s->gb, 16);
1316 s->vbv_delay = vbv_delay;
1317 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1318 s->full_pel[0] = get_bits1(&s->gb);
1319 f_code = get_bits(&s->gb, 3);
1320 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1323 s->mpeg_f_code[0][0] = f_code;
1324 s->mpeg_f_code[0][1] = f_code;
1326 if (s->pict_type == AV_PICTURE_TYPE_B) {
1327 s->full_pel[1] = get_bits1(&s->gb);
1328 f_code = get_bits(&s->gb, 3);
1329 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1332 s->mpeg_f_code[1][0] = f_code;
1333 s->mpeg_f_code[1][1] = f_code;
1335 s->current_picture.f.pict_type = s->pict_type;
1336 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1338 if (avctx->debug & FF_DEBUG_PICT_INFO)
1339 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1346 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1348 MpegEncContext *s= &s1->mpeg_enc_ctx;
1349 int horiz_size_ext, vert_size_ext;
1352 skip_bits(&s->gb, 1); /* profile and level esc*/
1353 s->avctx->profile = get_bits(&s->gb, 3);
1354 s->avctx->level = get_bits(&s->gb, 4);
1355 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1356 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1357 horiz_size_ext = get_bits(&s->gb, 2);
1358 vert_size_ext = get_bits(&s->gb, 2);
1359 s->width |= (horiz_size_ext << 12);
1360 s->height |= (vert_size_ext << 12);
1361 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1362 s->bit_rate += (bit_rate_ext << 18) * 400;
1363 skip_bits1(&s->gb); /* marker */
1364 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1366 s->low_delay = get_bits1(&s->gb);
1367 if (s->flags & CODEC_FLAG_LOW_DELAY)
1370 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1371 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1373 av_dlog(s->avctx, "sequence extension\n");
1374 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1376 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1377 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1378 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1382 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1384 MpegEncContext *s = &s1->mpeg_enc_ctx;
1385 int color_description, w, h;
1387 skip_bits(&s->gb, 3); /* video format */
1388 color_description = get_bits1(&s->gb);
1389 if (color_description) {
1390 s->avctx->color_primaries = get_bits(&s->gb, 8);
1391 s->avctx->color_trc = get_bits(&s->gb, 8);
1392 s->avctx->colorspace = get_bits(&s->gb, 8);
1394 w = get_bits(&s->gb, 14);
1395 skip_bits(&s->gb, 1); //marker
1396 h = get_bits(&s->gb, 14);
1397 // remaining 3 bits are zero padding
1399 s1->pan_scan.width = 16 * w;
1400 s1->pan_scan.height = 16 * h;
1402 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1403 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1406 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1408 MpegEncContext *s = &s1->mpeg_enc_ctx;
1412 if (s->progressive_sequence) {
1413 if (s->repeat_first_field) {
1415 if (s->top_field_first)
1419 if (s->picture_structure == PICT_FRAME) {
1421 if (s->repeat_first_field)
1425 for (i = 0; i < nofco; i++) {
1426 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1427 skip_bits(&s->gb, 1); // marker
1428 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1429 skip_bits(&s->gb, 1); // marker
1432 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1433 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1434 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1435 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1436 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1439 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1443 for (i = 0; i < 64; i++) {
1444 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1445 int v = get_bits(&s->gb, 8);
1447 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1450 if (intra && i == 0 && v != 8) {
1451 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1452 v = 8; // needed by pink.mpg / issue1046
1461 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1463 av_dlog(s->avctx, "matrix extension\n");
1465 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1466 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1467 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1468 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1471 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1473 MpegEncContext *s = &s1->mpeg_enc_ctx;
1475 s->full_pel[0] = s->full_pel[1] = 0;
1476 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1477 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1478 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1479 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1480 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1481 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1482 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1483 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1484 s->pict_type = AV_PICTURE_TYPE_I;
1486 s->pict_type = AV_PICTURE_TYPE_P;
1488 s->pict_type = AV_PICTURE_TYPE_B;
1489 s->current_picture.f.pict_type = s->pict_type;
1490 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1492 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1493 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1494 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1495 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1497 s->intra_dc_precision = get_bits(&s->gb, 2);
1498 s->picture_structure = get_bits(&s->gb, 2);
1499 s->top_field_first = get_bits1(&s->gb);
1500 s->frame_pred_frame_dct = get_bits1(&s->gb);
1501 s->concealment_motion_vectors = get_bits1(&s->gb);
1502 s->q_scale_type = get_bits1(&s->gb);
1503 s->intra_vlc_format = get_bits1(&s->gb);
1504 s->alternate_scan = get_bits1(&s->gb);
1505 s->repeat_first_field = get_bits1(&s->gb);
1506 s->chroma_420_type = get_bits1(&s->gb);
1507 s->progressive_frame = get_bits1(&s->gb);
1510 if (s->alternate_scan) {
1511 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1512 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1514 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1515 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1518 /* composite display not parsed */
1519 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1520 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1521 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1522 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1523 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1524 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1525 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1526 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1527 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1530 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1532 AVCodecContext *avctx = s->avctx;
1533 Mpeg1Context *s1 = (Mpeg1Context*)s;
1535 /* start frame decoding */
1536 if (s->first_field || s->picture_structure == PICT_FRAME) {
1537 AVFrameSideData *pan_scan;
1539 if (ff_MPV_frame_start(s, avctx) < 0)
1542 ff_mpeg_er_frame_start(s);
1544 /* first check if we must repeat the frame */
1545 s->current_picture_ptr->f.repeat_pict = 0;
1546 if (s->repeat_first_field) {
1547 if (s->progressive_sequence) {
1548 if (s->top_field_first)
1549 s->current_picture_ptr->f.repeat_pict = 4;
1551 s->current_picture_ptr->f.repeat_pict = 2;
1552 } else if (s->progressive_frame) {
1553 s->current_picture_ptr->f.repeat_pict = 1;
1557 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1558 AV_FRAME_DATA_PANSCAN,
1559 sizeof(s1->pan_scan));
1561 return AVERROR(ENOMEM);
1562 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1564 if (s1->a53_caption) {
1565 AVFrameSideData *sd = av_frame_new_side_data(
1566 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1567 s1->a53_caption_size);
1569 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1570 av_freep(&s1->a53_caption);
1572 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1573 ff_thread_finish_setup(avctx);
1574 } else { // second field
1577 if (!s->current_picture_ptr) {
1578 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1582 if (s->avctx->hwaccel &&
1583 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1584 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1585 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1588 for (i = 0; i < 4; i++) {
1589 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1590 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1591 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1596 if (avctx->hwaccel) {
1597 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1604 #define DECODE_SLICE_ERROR -1
1605 #define DECODE_SLICE_OK 0
1609 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1610 * @return DECODE_SLICE_ERROR if the slice is damaged,
1611 * DECODE_SLICE_OK if this slice is OK
1613 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1614 const uint8_t **buf, int buf_size)
1616 AVCodecContext *avctx = s->avctx;
1617 const int lowres = s->avctx->lowres;
1618 const int field_pic = s->picture_structure != PICT_FRAME;
1621 s->resync_mb_y = -1;
1623 av_assert0(mb_y < s->mb_height);
1625 init_get_bits(&s->gb, *buf, buf_size * 8);
1626 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1627 skip_bits(&s->gb, 3);
1629 ff_mpeg1_clean_buffers(s);
1630 s->interlaced_dct = 0;
1632 s->qscale = get_qscale(s);
1634 if (s->qscale == 0) {
1635 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1639 /* extra slice info */
1640 if (skip_1stop_8data_bits(&s->gb) < 0)
1641 return AVERROR_INVALIDDATA;
1645 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1648 while (get_bits_left(&s->gb) > 0) {
1649 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1650 MBINCR_VLC_BITS, 2);
1652 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1659 /* otherwise, stuffing, nothing to do */
1667 if (s->mb_x >= (unsigned)s->mb_width) {
1668 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1672 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1673 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1674 int start_code = -1;
1675 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1676 if (buf_end < *buf + buf_size)
1679 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1680 return DECODE_SLICE_ERROR;
1682 return DECODE_SLICE_OK;
1685 s->resync_mb_x = s->mb_x;
1686 s->resync_mb_y = s->mb_y = mb_y;
1688 ff_init_block_index(s);
1690 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1691 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1692 av_log(s->avctx, AV_LOG_DEBUG, "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",
1693 s->qscale, s->mpeg_f_code[0][0], s->mpeg_f_code[0][1], s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1694 s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1695 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1696 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1697 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1702 // If 1, we memcpy blocks in xvmcvideo.
1703 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1704 ff_xvmc_init_block(s); // set s->block
1706 if (mpeg_decode_mb(s, s->block) < 0)
1709 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1710 const int wrap = s->b8_stride;
1711 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1712 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1713 int motion_x, motion_y, dir, i;
1715 for (i = 0; i < 2; i++) {
1716 for (dir = 0; dir < 2; dir++) {
1717 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1718 motion_x = motion_y = 0;
1719 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1720 motion_x = s->mv[dir][0][0];
1721 motion_y = s->mv[dir][0][1];
1722 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1723 motion_x = s->mv[dir][i][0];
1724 motion_y = s->mv[dir][i][1];
1727 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1728 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1729 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1730 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1731 s->current_picture.ref_index [dir][b8_xy ] =
1732 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1733 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1740 s->dest[0] += 16 >> lowres;
1741 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1742 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1744 ff_MPV_decode_mb(s, s->block);
1746 if (++s->mb_x >= s->mb_width) {
1747 const int mb_size = 16 >> s->avctx->lowres;
1749 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1750 ff_MPV_report_decode_progress(s);
1753 s->mb_y += 1 << field_pic;
1755 if (s->mb_y >= s->mb_height) {
1756 int left = get_bits_left(&s->gb);
1757 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1758 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1759 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1761 if (left >= 32 && !is_d10) {
1762 GetBitContext gb = s->gb;
1763 align_get_bits(&gb);
1764 if (show_bits(&gb, 24) == 0x060E2B) {
1765 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1770 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1771 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1772 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1778 ff_init_block_index(s);
1781 /* skip mb handling */
1782 if (s->mb_skip_run == -1) {
1783 /* read increment again */
1786 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1787 MBINCR_VLC_BITS, 2);
1789 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1794 s->mb_skip_run += 33;
1795 } else if (code == 35) {
1796 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1797 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1800 goto eos; /* end of slice */
1802 /* otherwise, stuffing, nothing to do */
1804 s->mb_skip_run += code;
1808 if (s->mb_skip_run) {
1810 if (s->pict_type == AV_PICTURE_TYPE_I) {
1811 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1817 for (i = 0; i < 12; i++)
1818 s->block_last_index[i] = -1;
1819 if (s->picture_structure == PICT_FRAME)
1820 s->mv_type = MV_TYPE_16X16;
1822 s->mv_type = MV_TYPE_FIELD;
1823 if (s->pict_type == AV_PICTURE_TYPE_P) {
1824 /* if P type, zero motion vector is implied */
1825 s->mv_dir = MV_DIR_FORWARD;
1826 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1827 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1828 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1829 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1831 /* if B type, reuse previous vectors and directions */
1832 s->mv[0][0][0] = s->last_mv[0][0][0];
1833 s->mv[0][0][1] = s->last_mv[0][0][1];
1834 s->mv[1][0][0] = s->last_mv[1][0][0];
1835 s->mv[1][0][1] = s->last_mv[1][0][1];
1840 eos: // end of slice
1841 *buf += (get_bits_count(&s->gb)-1)/8;
1842 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1846 static int slice_decode_thread(AVCodecContext *c, void *arg)
1848 MpegEncContext *s = *(void**)arg;
1849 const uint8_t *buf = s->gb.buffer;
1850 int mb_y = s->start_mb_y;
1851 const int field_pic = s->picture_structure != PICT_FRAME;
1853 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1856 uint32_t start_code;
1859 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1861 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1862 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1863 s->start_mb_y, s->end_mb_y, s->er.error_count);
1865 if (c->err_recognition & AV_EF_EXPLODE)
1867 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1868 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
1870 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_AC_END | ER_DC_END | ER_MV_END);
1873 if (s->mb_y == s->end_mb_y)
1877 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1878 mb_y= start_code - SLICE_MIN_START_CODE;
1879 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1880 mb_y += (*buf&0xE0)<<2;
1882 if (s->picture_structure == PICT_BOTTOM_FIELD)
1884 if (mb_y < 0 || mb_y >= s->end_mb_y)
1890 * Handle slice ends.
1891 * @return 1 if it seems to be the last slice
1893 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1895 Mpeg1Context *s1 = avctx->priv_data;
1896 MpegEncContext *s = &s1->mpeg_enc_ctx;
1898 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1901 if (s->avctx->hwaccel) {
1902 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1903 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1906 /* end of slice reached */
1907 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1910 ff_er_frame_end(&s->er);
1912 ff_MPV_frame_end(s);
1914 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1915 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1918 ff_print_debug_info(s, s->current_picture_ptr, pict);
1919 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1921 if (avctx->active_thread_type & FF_THREAD_FRAME)
1922 s->picture_number++;
1923 /* latency of 1 frame for I- and P-frames */
1924 /* XXX: use another variable than picture_number */
1925 if (s->last_picture_ptr != NULL) {
1926 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1929 ff_print_debug_info(s, s->last_picture_ptr, pict);
1930 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1940 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1941 const uint8_t *buf, int buf_size)
1943 Mpeg1Context *s1 = avctx->priv_data;
1944 MpegEncContext *s = &s1->mpeg_enc_ctx;
1948 init_get_bits(&s->gb, buf, buf_size*8);
1950 width = get_bits(&s->gb, 12);
1951 height = get_bits(&s->gb, 12);
1952 if (width == 0 || height == 0) {
1953 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1955 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1956 return AVERROR_INVALIDDATA;
1958 s->aspect_ratio_info = get_bits(&s->gb, 4);
1959 if (s->aspect_ratio_info == 0) {
1960 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1961 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1964 s->frame_rate_index = get_bits(&s->gb, 4);
1965 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1967 s->bit_rate = get_bits(&s->gb, 18) * 400;
1968 if (get_bits1(&s->gb) == 0) /* marker */
1973 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1974 skip_bits(&s->gb, 1);
1977 if (get_bits1(&s->gb)) {
1978 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1980 for (i = 0; i < 64; i++) {
1981 j = s->dsp.idct_permutation[i];
1982 v = ff_mpeg1_default_intra_matrix[i];
1983 s->intra_matrix[j] = v;
1984 s->chroma_intra_matrix[j] = v;
1987 if (get_bits1(&s->gb)) {
1988 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1990 for (i = 0; i < 64; i++) {
1991 int j = s->dsp.idct_permutation[i];
1992 v = ff_mpeg1_default_non_intra_matrix[i];
1993 s->inter_matrix[j] = v;
1994 s->chroma_inter_matrix[j] = v;
1998 if (show_bits(&s->gb, 23) != 0) {
1999 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2003 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2004 s->progressive_sequence = 1;
2005 s->progressive_frame = 1;
2006 s->picture_structure = PICT_FRAME;
2008 s->frame_pred_frame_dct = 1;
2009 s->chroma_format = 1;
2010 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2011 s->out_format = FMT_MPEG1;
2012 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2013 if (s->flags & CODEC_FLAG_LOW_DELAY)
2016 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2017 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2018 s->avctx->rc_buffer_size, s->bit_rate);
2023 static int vcr2_init_sequence(AVCodecContext *avctx)
2025 Mpeg1Context *s1 = avctx->priv_data;
2026 MpegEncContext *s = &s1->mpeg_enc_ctx;
2029 /* start new MPEG-1 context decoding */
2030 s->out_format = FMT_MPEG1;
2031 if (s1->mpeg_enc_ctx_allocated) {
2032 ff_MPV_common_end(s);
2033 s1->mpeg_enc_ctx_allocated = 0;
2035 s->width = avctx->coded_width;
2036 s->height = avctx->coded_height;
2037 avctx->has_b_frames = 0; // true?
2040 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2041 setup_hwaccel_for_pixfmt(avctx);
2043 if (ff_MPV_common_init(s) < 0)
2045 s1->mpeg_enc_ctx_allocated = 1;
2047 for (i = 0; i < 64; i++) {
2048 int j = s->dsp.idct_permutation[i];
2049 v = ff_mpeg1_default_intra_matrix[i];
2050 s->intra_matrix[j] = v;
2051 s->chroma_intra_matrix[j] = v;
2053 v = ff_mpeg1_default_non_intra_matrix[i];
2054 s->inter_matrix[j] = v;
2055 s->chroma_inter_matrix[j] = v;
2058 s->progressive_sequence = 1;
2059 s->progressive_frame = 1;
2060 s->picture_structure = PICT_FRAME;
2062 s->frame_pred_frame_dct = 1;
2063 s->chroma_format = 1;
2064 if (s->codec_tag == AV_RL32("BW10")) {
2065 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2067 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2068 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2070 s1->save_width = s->width;
2071 s1->save_height = s->height;
2072 s1->save_progressive_seq = s->progressive_sequence;
2077 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2078 const uint8_t *p, int buf_size)
2080 Mpeg1Context *s1 = avctx->priv_data;
2082 if (buf_size >= 6 &&
2083 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2084 p[4] == 3 && (p[5] & 0x40)) {
2085 /* extract A53 Part 4 CC data */
2086 int cc_count = p[5] & 0x1f;
2087 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2088 av_freep(&s1->a53_caption);
2089 s1->a53_caption_size = cc_count * 3;
2090 s1->a53_caption = av_malloc(s1->a53_caption_size);
2091 if (s1->a53_caption) {
2092 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2096 } else if (buf_size >= 11 &&
2097 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2098 /* extract DVD CC data */
2101 // There is a caption count field in the data, but it is often
2102 // incorect. So count the number of captions present.
2103 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2105 // Transform the DVD format into A53 Part 4 format
2107 av_freep(&s1->a53_caption);
2108 s1->a53_caption_size = cc_count * 6;
2109 s1->a53_caption = av_malloc(s1->a53_caption_size);
2110 if (s1->a53_caption) {
2111 uint8_t field1 = !!(p[4] & 0x80);
2112 uint8_t *cap = s1->a53_caption;
2114 for (i = 0; i < cc_count; i++) {
2115 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2118 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2131 static void mpeg_decode_user_data(AVCodecContext *avctx,
2132 const uint8_t *p, int buf_size)
2134 Mpeg1Context *s = avctx->priv_data;
2135 const uint8_t *buf_end = p + buf_size;
2140 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2144 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2145 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2147 av_log(avctx, AV_LOG_ERROR, "\n");*/
2150 /* we parse the DTG active format information */
2151 if (buf_end - p >= 5 &&
2152 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2160 if (buf_end - p < 1)
2162 avctx->dtg_active_format = p[0] & 0x0f;
2164 } else if (buf_end - p >= 6 &&
2165 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2166 p[4] == 0x03) { // S3D_video_format_length
2167 // the 0x7F mask ignores the reserved_bit value
2168 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2170 if (S3D_video_format_type == 0x03 ||
2171 S3D_video_format_type == 0x04 ||
2172 S3D_video_format_type == 0x08 ||
2173 S3D_video_format_type == 0x23) {
2174 Mpeg1Context *s1 = avctx->priv_data;
2175 MpegEncContext *s = &s1->mpeg_enc_ctx;
2177 if (!s->current_picture_ptr)
2180 stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2184 switch (S3D_video_format_type) {
2186 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2189 stereo->type = AV_STEREO3D_TOPBOTTOM;
2192 stereo->type = AV_STEREO3D_2D;
2195 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2199 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2204 static void mpeg_decode_gop(AVCodecContext *avctx,
2205 const uint8_t *buf, int buf_size)
2207 Mpeg1Context *s1 = avctx->priv_data;
2208 MpegEncContext *s = &s1->mpeg_enc_ctx;
2212 init_get_bits(&s->gb, buf, buf_size*8);
2214 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2216 s->closed_gop = get_bits1(&s->gb);
2217 /*broken_link indicate that after editing the
2218 reference frames of the first B-Frames after GOP I-Frame
2219 are missing (open gop)*/
2220 broken_link = get_bits1(&s->gb);
2222 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2223 char tcbuf[AV_TIMECODE_STR_SIZE];
2224 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2225 av_log(s->avctx, AV_LOG_DEBUG,
2226 "GOP (%s) closed_gop=%d broken_link=%d\n",
2227 tcbuf, s->closed_gop, broken_link);
2231 static int decode_chunks(AVCodecContext *avctx,
2232 AVFrame *picture, int *got_output,
2233 const uint8_t *buf, int buf_size)
2235 Mpeg1Context *s = avctx->priv_data;
2236 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2237 const uint8_t *buf_ptr = buf;
2238 const uint8_t *buf_end = buf + buf_size;
2239 int ret, input_size;
2240 int last_code = 0, skip_frame = 0;
2241 int picture_start_code_seen = 0;
2244 /* find next start code */
2245 uint32_t start_code = -1;
2246 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2247 if (start_code > 0x1ff) {
2249 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2252 av_assert0(avctx->thread_count > 1);
2254 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2255 for (i = 0; i < s->slice_count; i++)
2256 s2->er.error_count += s2->thread_context[i]->er.error_count;
2259 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2260 && uses_vdpau(avctx))
2261 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2263 ret = slice_end(avctx, picture);
2267 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2273 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2274 return AVERROR_INVALIDDATA;
2276 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2279 input_size = buf_end - buf_ptr;
2281 if (avctx->debug & FF_DEBUG_STARTCODE) {
2282 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2285 /* prepare data for next start code */
2286 switch (start_code) {
2287 case SEQ_START_CODE:
2288 if (last_code == 0) {
2289 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2290 if(buf != avctx->extradata)
2293 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2294 if (avctx->err_recognition & AV_EF_EXPLODE)
2295 return AVERROR_INVALIDDATA;
2299 case PICTURE_START_CODE:
2300 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2301 /* If it's a frame picture, there can't be more than one picture header.
2302 Yet, it does happen and we need to handle it. */
2303 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2306 picture_start_code_seen = 1;
2308 if (s2->width <= 0 || s2->height <= 0) {
2309 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2310 s2->width, s2->height);
2311 return AVERROR_INVALIDDATA;
2315 s2->intra_dc_precision= 3;
2316 s2->intra_matrix[0]= 1;
2318 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2319 !avctx->hwaccel && s->slice_count) {
2322 avctx->execute(avctx, slice_decode_thread,
2323 s2->thread_context, NULL,
2324 s->slice_count, sizeof(void*));
2325 for (i = 0; i < s->slice_count; i++)
2326 s2->er.error_count += s2->thread_context[i]->er.error_count;
2329 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2330 ret = mpeg_decode_postinit(avctx);
2332 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2336 /* we have a complete image: we try to decompress it */
2337 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2340 last_code = PICTURE_START_CODE;
2342 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2343 if (avctx->err_recognition & AV_EF_EXPLODE)
2344 return AVERROR_INVALIDDATA;
2347 case EXT_START_CODE:
2348 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2350 switch (get_bits(&s2->gb, 4)) {
2352 if (last_code == 0) {
2353 mpeg_decode_sequence_extension(s);
2355 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2356 if (avctx->err_recognition & AV_EF_EXPLODE)
2357 return AVERROR_INVALIDDATA;
2361 mpeg_decode_sequence_display_extension(s);
2364 mpeg_decode_quant_matrix_extension(s2);
2367 mpeg_decode_picture_display_extension(s);
2370 if (last_code == PICTURE_START_CODE) {
2371 mpeg_decode_picture_coding_extension(s);
2373 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2374 if (avctx->err_recognition & AV_EF_EXPLODE)
2375 return AVERROR_INVALIDDATA;
2380 case USER_START_CODE:
2381 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2383 case GOP_START_CODE:
2384 if (last_code == 0) {
2386 mpeg_decode_gop(avctx, buf_ptr, input_size);
2389 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2390 if (avctx->err_recognition & AV_EF_EXPLODE)
2391 return AVERROR_INVALIDDATA;
2395 if (start_code >= SLICE_MIN_START_CODE &&
2396 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2398 if (s2->progressive_sequence && !s2->progressive_frame) {
2399 s2->progressive_frame = 1;
2400 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2403 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2404 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2405 s2->picture_structure = PICT_FRAME;
2408 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2409 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2412 if (s2->picture_structure == PICT_FRAME) {
2413 s2->first_field = 0;
2414 s2->v_edge_pos = 16 * s2->mb_height;
2416 s2->first_field ^= 1;
2417 s2->v_edge_pos = 8 * s2->mb_height;
2418 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2421 if (start_code >= SLICE_MIN_START_CODE &&
2422 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2423 const int field_pic = s2->picture_structure != PICT_FRAME;
2424 int mb_y = start_code - SLICE_MIN_START_CODE;
2425 last_code = SLICE_MIN_START_CODE;
2426 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2427 mb_y += (*buf_ptr&0xE0)<<2;
2430 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2433 if (buf_end - buf_ptr < 2) {
2434 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2435 return AVERROR_INVALIDDATA;
2438 if (mb_y >= s2->mb_height) {
2439 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2443 if (s2->last_picture_ptr == NULL) {
2444 /* Skip B-frames if we do not have reference frames and gop is not closed */
2445 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2446 if (!s2->closed_gop) {
2452 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2454 if (s2->next_picture_ptr == NULL) {
2455 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2456 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2461 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2462 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2463 avctx->skip_frame >= AVDISCARD_ALL) {
2468 if (!s->mpeg_enc_ctx_allocated)
2471 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2472 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2476 if (!s2->pict_type) {
2477 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2478 if (avctx->err_recognition & AV_EF_EXPLODE)
2479 return AVERROR_INVALIDDATA;
2483 if (s->first_slice) {
2486 if (mpeg_field_start(s2, buf, buf_size) < 0)
2489 if (!s2->current_picture_ptr) {
2490 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2491 return AVERROR_INVALIDDATA;
2494 if (uses_vdpau(avctx)) {
2499 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2501 int threshold = (s2->mb_height * s->slice_count +
2502 s2->slice_context_count / 2) /
2503 s2->slice_context_count;
2504 av_assert0(avctx->thread_count > 1);
2505 if (threshold <= mb_y) {
2506 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2508 thread_context->start_mb_y = mb_y;
2509 thread_context->end_mb_y = s2->mb_height;
2510 if (s->slice_count) {
2511 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2512 ret = ff_update_duplicate_context(thread_context,
2517 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2520 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2522 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2526 if (avctx->err_recognition & AV_EF_EXPLODE)
2528 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2529 ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2531 ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, ER_AC_END | ER_DC_END | ER_MV_END);
2540 static int mpeg_decode_frame(AVCodecContext *avctx,
2541 void *data, int *got_output,
2544 const uint8_t *buf = avpkt->data;
2546 int buf_size = avpkt->size;
2547 Mpeg1Context *s = avctx->priv_data;
2548 AVFrame *picture = data;
2549 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2550 av_dlog(avctx, "fill_buffer\n");
2552 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2553 /* special case for last picture */
2554 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2555 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2559 s2->next_picture_ptr = NULL;
2566 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2567 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2569 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2573 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2574 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2575 || s2->codec_tag == AV_RL32("BW10")
2577 vcr2_init_sequence(avctx);
2581 if (avctx->extradata && !s->extradata_decoded) {
2582 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2584 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2587 s->extradata_decoded = 1;
2588 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2589 s2->current_picture_ptr = NULL;
2594 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2595 if (ret<0 || *got_output)
2596 s2->current_picture_ptr = NULL;
2602 static void flush(AVCodecContext *avctx)
2604 Mpeg1Context *s = avctx->priv_data;
2608 ff_mpeg_flush(avctx);
2611 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2613 Mpeg1Context *s = avctx->priv_data;
2615 if (s->mpeg_enc_ctx_allocated)
2616 ff_MPV_common_end(&s->mpeg_enc_ctx);
2617 av_freep(&s->a53_caption);
2621 static const AVProfile mpeg2_video_profiles[] = {
2622 { FF_PROFILE_MPEG2_422, "4:2:2" },
2623 { FF_PROFILE_MPEG2_HIGH, "High" },
2624 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2625 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2626 { FF_PROFILE_MPEG2_MAIN, "Main" },
2627 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2628 { FF_PROFILE_RESERVED, "Reserved" },
2629 { FF_PROFILE_RESERVED, "Reserved" },
2630 { FF_PROFILE_UNKNOWN },
2634 AVCodec ff_mpeg1video_decoder = {
2635 .name = "mpeg1video",
2636 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2637 .type = AVMEDIA_TYPE_VIDEO,
2638 .id = AV_CODEC_ID_MPEG1VIDEO,
2639 .priv_data_size = sizeof(Mpeg1Context),
2640 .init = mpeg_decode_init,
2641 .close = mpeg_decode_end,
2642 .decode = mpeg_decode_frame,
2643 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2644 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2645 CODEC_CAP_SLICE_THREADS,
2648 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2651 AVCodec ff_mpeg2video_decoder = {
2652 .name = "mpeg2video",
2653 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2654 .type = AVMEDIA_TYPE_VIDEO,
2655 .id = AV_CODEC_ID_MPEG2VIDEO,
2656 .priv_data_size = sizeof(Mpeg1Context),
2657 .init = mpeg_decode_init,
2658 .close = mpeg_decode_end,
2659 .decode = mpeg_decode_frame,
2660 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2661 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2662 CODEC_CAP_SLICE_THREADS,
2665 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2669 AVCodec ff_mpegvideo_decoder = {
2670 .name = "mpegvideo",
2671 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2672 .type = AVMEDIA_TYPE_VIDEO,
2673 .id = AV_CODEC_ID_MPEG2VIDEO,
2674 .priv_data_size = sizeof(Mpeg1Context),
2675 .init = mpeg_decode_init,
2676 .close = mpeg_decode_end,
2677 .decode = mpeg_decode_frame,
2678 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2684 #if CONFIG_MPEG_XVMC_DECODER
2685 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2687 if (avctx->active_thread_type & FF_THREAD_SLICE)
2689 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2691 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2692 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2694 mpeg_decode_init(avctx);
2696 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2697 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2702 AVCodec ff_mpeg_xvmc_decoder = {
2703 .name = "mpegvideo_xvmc",
2704 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2705 .type = AVMEDIA_TYPE_VIDEO,
2706 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2707 .priv_data_size = sizeof(Mpeg1Context),
2708 .init = mpeg_mc_decode_init,
2709 .close = mpeg_decode_end,
2710 .decode = mpeg_decode_frame,
2711 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2712 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2717 #endif /* FF_API_XVMC */
2719 #if CONFIG_MPEG_VDPAU_DECODER
2720 AVCodec ff_mpeg_vdpau_decoder = {
2721 .name = "mpegvideo_vdpau",
2722 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2723 .type = AVMEDIA_TYPE_VIDEO,
2724 .id = AV_CODEC_ID_MPEG2VIDEO,
2725 .priv_data_size = sizeof(Mpeg1Context),
2726 .init = mpeg_decode_init,
2727 .close = mpeg_decode_end,
2728 .decode = mpeg_decode_frame,
2729 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2730 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2735 #if CONFIG_MPEG1_VDPAU_DECODER
2736 AVCodec ff_mpeg1_vdpau_decoder = {
2737 .name = "mpeg1video_vdpau",
2738 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2739 .type = AVMEDIA_TYPE_VIDEO,
2740 .id = AV_CODEC_ID_MPEG1VIDEO,
2741 .priv_data_size = sizeof(Mpeg1Context),
2742 .init = mpeg_decode_init,
2743 .close = mpeg_decode_end,
2744 .decode = mpeg_decode_frame,
2745 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2746 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,