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];
669 static void exchange_uv(MpegEncContext *s)
674 s->pblocks[4] = s->pblocks[5];
678 /* motion type (for MPEG-2) */
684 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
686 int i, j, k, cbp, val, mb_type, motion_type;
687 const int mb_block_count = 4 + (1 << s->chroma_format);
689 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
691 av_assert2(s->mb_skipped == 0);
693 if (s->mb_skip_run-- != 0) {
694 if (s->pict_type == AV_PICTURE_TYPE_P) {
696 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
701 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
703 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
704 if (IS_INTRA(mb_type)) {
705 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
708 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
709 mb_type | MB_TYPE_SKIP;
711 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
718 switch (s->pict_type) {
720 case AV_PICTURE_TYPE_I:
721 if (get_bits1(&s->gb) == 0) {
722 if (get_bits1(&s->gb) == 0) {
723 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
726 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
728 mb_type = MB_TYPE_INTRA;
731 case AV_PICTURE_TYPE_P:
732 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
734 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
737 mb_type = ptype2mb_type[mb_type];
739 case AV_PICTURE_TYPE_B:
740 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
742 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
745 mb_type = btype2mb_type[mb_type];
748 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
749 // motion_type = 0; /* avoid warning */
750 if (IS_INTRA(mb_type)) {
751 s->dsp.clear_blocks(s->block[0]);
753 if (!s->chroma_y_shift) {
754 s->dsp.clear_blocks(s->block[6]);
757 /* compute DCT type */
758 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
759 !s->frame_pred_frame_dct) {
760 s->interlaced_dct = get_bits1(&s->gb);
763 if (IS_QUANT(mb_type))
764 s->qscale = get_qscale(s);
766 if (s->concealment_motion_vectors) {
767 /* just parse them */
768 if (s->picture_structure != PICT_FRAME)
769 skip_bits1(&s->gb); /* field select */
771 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
772 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
773 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
774 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
776 skip_bits1(&s->gb); /* marker */
778 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
781 FF_DISABLE_DEPRECATION_WARNINGS
782 // if 1, we memcpy blocks in xvmcvideo
783 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
784 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
789 FF_ENABLE_DEPRECATION_WARNINGS
790 #endif /* FF_API_XVMC */
792 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
793 if (s->flags2 & CODEC_FLAG2_FAST) {
794 for (i = 0; i < 6; i++) {
795 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
798 for (i = 0; i < mb_block_count; i++) {
799 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
804 for (i = 0; i < 6; i++) {
805 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
810 if (mb_type & MB_TYPE_ZERO_MV) {
811 av_assert2(mb_type & MB_TYPE_CBP);
813 s->mv_dir = MV_DIR_FORWARD;
814 if (s->picture_structure == PICT_FRAME) {
815 if (s->picture_structure == PICT_FRAME
816 && !s->frame_pred_frame_dct)
817 s->interlaced_dct = get_bits1(&s->gb);
818 s->mv_type = MV_TYPE_16X16;
820 s->mv_type = MV_TYPE_FIELD;
821 mb_type |= MB_TYPE_INTERLACED;
822 s->field_select[0][0] = s->picture_structure - 1;
825 if (IS_QUANT(mb_type))
826 s->qscale = get_qscale(s);
828 s->last_mv[0][0][0] = 0;
829 s->last_mv[0][0][1] = 0;
830 s->last_mv[0][1][0] = 0;
831 s->last_mv[0][1][1] = 0;
835 av_assert2(mb_type & MB_TYPE_L0L1);
836 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
837 /* get additional motion vector type */
838 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
839 motion_type = MT_FRAME;
841 motion_type = get_bits(&s->gb, 2);
842 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
843 s->interlaced_dct = get_bits1(&s->gb);
846 if (IS_QUANT(mb_type))
847 s->qscale = get_qscale(s);
850 s->mv_dir = (mb_type >> 13) & 3;
851 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
852 switch (motion_type) {
853 case MT_FRAME: /* or MT_16X8 */
854 if (s->picture_structure == PICT_FRAME) {
855 mb_type |= MB_TYPE_16x16;
856 s->mv_type = MV_TYPE_16X16;
857 for (i = 0; i < 2; i++) {
858 if (USES_LIST(mb_type, i)) {
860 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
861 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
862 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
863 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
864 /* full_pel: only for MPEG-1 */
865 if (s->full_pel[i]) {
866 s->mv[i][0][0] <<= 1;
867 s->mv[i][0][1] <<= 1;
872 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
873 s->mv_type = MV_TYPE_16X8;
874 for (i = 0; i < 2; i++) {
875 if (USES_LIST(mb_type, i)) {
877 for (j = 0; j < 2; j++) {
878 s->field_select[i][j] = get_bits1(&s->gb);
879 for (k = 0; k < 2; k++) {
880 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
881 s->last_mv[i][j][k]);
882 s->last_mv[i][j][k] = val;
883 s->mv[i][j][k] = val;
891 s->mv_type = MV_TYPE_FIELD;
892 if (s->picture_structure == PICT_FRAME) {
893 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
894 for (i = 0; i < 2; i++) {
895 if (USES_LIST(mb_type, i)) {
896 for (j = 0; j < 2; j++) {
897 s->field_select[i][j] = get_bits1(&s->gb);
898 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
899 s->last_mv[i][j][0]);
900 s->last_mv[i][j][0] = val;
901 s->mv[i][j][0] = val;
902 av_dlog(s->avctx, "fmx=%d\n", val);
903 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
904 s->last_mv[i][j][1] >> 1);
905 s->last_mv[i][j][1] = val << 1;
906 s->mv[i][j][1] = val;
907 av_dlog(s->avctx, "fmy=%d\n", val);
912 av_assert0(!s->progressive_sequence);
913 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
914 for (i = 0; i < 2; i++) {
915 if (USES_LIST(mb_type, i)) {
916 s->field_select[i][0] = get_bits1(&s->gb);
917 for (k = 0; k < 2; k++) {
918 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
919 s->last_mv[i][0][k]);
920 s->last_mv[i][0][k] = val;
921 s->last_mv[i][1][k] = val;
922 s->mv[i][0][k] = val;
929 if(s->progressive_sequence){
930 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
933 s->mv_type = MV_TYPE_DMV;
934 for (i = 0; i < 2; i++) {
935 if (USES_LIST(mb_type, i)) {
936 int dmx, dmy, mx, my, m;
937 const int my_shift = s->picture_structure == PICT_FRAME;
939 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
940 s->last_mv[i][0][0]);
941 s->last_mv[i][0][0] = mx;
942 s->last_mv[i][1][0] = mx;
944 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
945 s->last_mv[i][0][1] >> my_shift);
949 s->last_mv[i][0][1] = my << my_shift;
950 s->last_mv[i][1][1] = my << my_shift;
954 s->mv[i][1][0] = mx; // not used
955 s->mv[i][1][1] = my; // not used
957 if (s->picture_structure == PICT_FRAME) {
958 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
960 // m = 1 + 2 * s->top_field_first;
961 m = s->top_field_first ? 1 : 3;
963 /* top -> top pred */
964 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
965 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
967 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
968 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
970 mb_type |= MB_TYPE_16x16;
972 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
973 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
974 if (s->picture_structure == PICT_TOP_FIELD)
983 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
989 if (HAS_CBP(mb_type)) {
990 s->dsp.clear_blocks(s->block[0]);
992 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
993 if (mb_block_count > 6) {
994 cbp <<= mb_block_count - 6;
995 cbp |= get_bits(&s->gb, mb_block_count - 6);
996 s->dsp.clear_blocks(s->block[6]);
999 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1004 FF_DISABLE_DEPRECATION_WARNINGS
1005 //if 1, we memcpy blocks in xvmcvideo
1006 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1007 ff_xvmc_pack_pblocks(s, cbp);
1012 FF_ENABLE_DEPRECATION_WARNINGS
1013 #endif /* FF_API_XVMC */
1015 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1016 if (s->flags2 & CODEC_FLAG2_FAST) {
1017 for (i = 0; i < 6; i++) {
1019 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1021 s->block_last_index[i] = -1;
1026 cbp <<= 12-mb_block_count;
1028 for (i = 0; i < mb_block_count; i++) {
1029 if (cbp & (1 << 11)) {
1030 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1033 s->block_last_index[i] = -1;
1039 if (s->flags2 & CODEC_FLAG2_FAST) {
1040 for (i = 0; i < 6; i++) {
1042 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1044 s->block_last_index[i] = -1;
1049 for (i = 0; i < 6; i++) {
1051 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1054 s->block_last_index[i] = -1;
1061 for (i = 0; i < 12; i++)
1062 s->block_last_index[i] = -1;
1066 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1071 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1073 Mpeg1Context *s = avctx->priv_data;
1074 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1077 /* we need some permutation to store matrices,
1078 * until MPV_common_init() sets the real permutation. */
1079 for (i = 0; i < 64; i++)
1080 s2->dsp.idct_permutation[i]=i;
1082 ff_MPV_decode_defaults(s2);
1084 s->mpeg_enc_ctx.avctx = avctx;
1085 s->mpeg_enc_ctx.flags = avctx->flags;
1086 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1087 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1088 ff_mpeg12_init_vlcs();
1090 s->mpeg_enc_ctx_allocated = 0;
1091 s->mpeg_enc_ctx.picture_number = 0;
1092 s->repeat_field = 0;
1093 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1094 avctx->color_range = AVCOL_RANGE_MPEG;
1095 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1096 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1098 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1102 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1104 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1105 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1108 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1111 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1112 if (err) return err;
1114 if (!ctx->mpeg_enc_ctx_allocated)
1115 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1117 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1118 s->picture_number++;
1123 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1124 const uint8_t *new_perm)
1126 uint16_t temp_matrix[64];
1129 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1131 for (i = 0; i < 64; i++) {
1132 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1136 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1138 #if CONFIG_MPEG_XVMC_DECODER
1139 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1140 AV_PIX_FMT_XVMC_MPEG2_MC,
1142 #endif /* FF_API_XVMC */
1143 #if CONFIG_MPEG1_VDPAU_HWACCEL
1144 AV_PIX_FMT_VDPAU_MPEG1,
1151 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1153 #if CONFIG_MPEG_XVMC_DECODER
1154 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1155 AV_PIX_FMT_XVMC_MPEG2_MC,
1157 #endif /* FF_API_XVMC */
1158 #if CONFIG_MPEG2_VDPAU_HWACCEL
1159 AV_PIX_FMT_VDPAU_MPEG2,
1162 #if CONFIG_MPEG2_DXVA2_HWACCEL
1163 AV_PIX_FMT_DXVA2_VLD,
1165 #if CONFIG_MPEG2_VAAPI_HWACCEL
1166 AV_PIX_FMT_VAAPI_VLD,
1172 static inline int uses_vdpau(AVCodecContext *avctx) {
1173 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1176 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1178 Mpeg1Context *s1 = avctx->priv_data;
1179 MpegEncContext *s = &s1->mpeg_enc_ctx;
1181 if(s->chroma_format < 2) {
1182 return ff_thread_get_format(avctx,
1183 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1184 mpeg1_hwaccel_pixfmt_list_420 :
1185 mpeg2_hwaccel_pixfmt_list_420);
1186 } else if(s->chroma_format == 2)
1187 return AV_PIX_FMT_YUV422P;
1189 return AV_PIX_FMT_YUV444P;
1192 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1195 FF_DISABLE_DEPRECATION_WARNINGS
1196 if (avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_IDCT && avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_MC) {
1197 avctx->xvmc_acceleration = 0;
1198 } else if (!avctx->xvmc_acceleration) {
1199 avctx->xvmc_acceleration = 2;
1201 FF_ENABLE_DEPRECATION_WARNINGS
1202 #endif /* FF_API_XVMC */
1203 avctx->hwaccel = ff_find_hwaccel(avctx);
1204 // until then pix_fmt may be changed right after codec init
1206 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1210 avctx->hwaccel || uses_vdpau(avctx))
1211 if (avctx->idct_algo == FF_IDCT_AUTO)
1212 avctx->idct_algo = FF_IDCT_SIMPLE;
1215 /* Call this function when we know all parameters.
1216 * It may be called in different places for MPEG-1 and MPEG-2. */
1217 static int mpeg_decode_postinit(AVCodecContext *avctx)
1219 Mpeg1Context *s1 = avctx->priv_data;
1220 MpegEncContext *s = &s1->mpeg_enc_ctx;
1221 uint8_t old_permutation[64];
1224 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1225 avctx->coded_width != s->width ||
1226 avctx->coded_height != s->height ||
1227 s1->save_width != s->width ||
1228 s1->save_height != s->height ||
1229 s1->save_aspect_info != s->aspect_ratio_info ||
1230 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1234 if (s1->mpeg_enc_ctx_allocated) {
1235 ParseContext pc = s->parse_context;
1236 s->parse_context.buffer = 0;
1237 ff_MPV_common_end(s);
1238 s->parse_context = pc;
1239 s1->mpeg_enc_ctx_allocated = 0;
1242 if ((s->width == 0) || (s->height == 0))
1245 ret = ff_set_dimensions(avctx, s->width, s->height);
1249 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1250 avctx->rc_max_rate = s->bit_rate;
1251 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1252 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1253 avctx->bit_rate = s->bit_rate;
1255 s1->save_aspect_info = s->aspect_ratio_info;
1256 s1->save_width = s->width;
1257 s1->save_height = s->height;
1258 s1->save_progressive_seq = s->progressive_sequence;
1260 /* low_delay may be forced, in this case we will have B-frames
1261 * that behave like P-frames. */
1262 avctx->has_b_frames = !s->low_delay;
1264 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1266 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1267 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1269 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1270 avctx->ticks_per_frame=1;
1273 av_reduce(&s->avctx->time_base.den,
1274 &s->avctx->time_base.num,
1275 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1276 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1278 avctx->ticks_per_frame = 2;
1280 if (s->aspect_ratio_info > 1) {
1282 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1283 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1284 (AVRational) {s->width, s->height});
1286 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1287 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1288 // issue1613, 621, 562
1289 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1290 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1291 s->avctx->sample_aspect_ratio =
1292 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1293 (AVRational) {s->width, s->height});
1295 s->avctx->sample_aspect_ratio =
1296 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1297 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1298 //issue1613 4/3 16/9 -> 16/9
1299 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1300 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1301 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1302 av_dlog(avctx, "A %d/%d\n",
1303 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1304 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1305 s->avctx->sample_aspect_ratio.den);
1308 s->avctx->sample_aspect_ratio =
1309 ff_mpeg2_aspect[s->aspect_ratio_info];
1313 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1314 setup_hwaccel_for_pixfmt(avctx);
1316 /* Quantization matrices may need reordering
1317 * if DCT permutation is changed. */
1318 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1320 if (ff_MPV_common_init(s) < 0)
1323 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1324 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1325 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1326 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1328 s1->mpeg_enc_ctx_allocated = 1;
1333 static int mpeg1_decode_picture(AVCodecContext *avctx,
1334 const uint8_t *buf, int buf_size)
1336 Mpeg1Context *s1 = avctx->priv_data;
1337 MpegEncContext *s = &s1->mpeg_enc_ctx;
1338 int ref, f_code, vbv_delay;
1340 init_get_bits(&s->gb, buf, buf_size*8);
1342 ref = get_bits(&s->gb, 10); /* temporal ref */
1343 s->pict_type = get_bits(&s->gb, 3);
1344 if (s->pict_type == 0 || s->pict_type > 3)
1347 vbv_delay = get_bits(&s->gb, 16);
1348 s->vbv_delay = vbv_delay;
1349 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1350 s->full_pel[0] = get_bits1(&s->gb);
1351 f_code = get_bits(&s->gb, 3);
1352 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1355 s->mpeg_f_code[0][0] = f_code;
1356 s->mpeg_f_code[0][1] = f_code;
1358 if (s->pict_type == AV_PICTURE_TYPE_B) {
1359 s->full_pel[1] = get_bits1(&s->gb);
1360 f_code = get_bits(&s->gb, 3);
1361 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1364 s->mpeg_f_code[1][0] = f_code;
1365 s->mpeg_f_code[1][1] = f_code;
1367 s->current_picture.f.pict_type = s->pict_type;
1368 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1370 if (avctx->debug & FF_DEBUG_PICT_INFO)
1371 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1378 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1380 MpegEncContext *s= &s1->mpeg_enc_ctx;
1381 int horiz_size_ext, vert_size_ext;
1384 skip_bits(&s->gb, 1); /* profile and level esc*/
1385 s->avctx->profile = get_bits(&s->gb, 3);
1386 s->avctx->level = get_bits(&s->gb, 4);
1387 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1388 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1389 horiz_size_ext = get_bits(&s->gb, 2);
1390 vert_size_ext = get_bits(&s->gb, 2);
1391 s->width |= (horiz_size_ext << 12);
1392 s->height |= (vert_size_ext << 12);
1393 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1394 s->bit_rate += (bit_rate_ext << 18) * 400;
1395 skip_bits1(&s->gb); /* marker */
1396 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1398 s->low_delay = get_bits1(&s->gb);
1399 if (s->flags & CODEC_FLAG_LOW_DELAY)
1402 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1403 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1405 av_dlog(s->avctx, "sequence extension\n");
1406 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1408 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1409 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1410 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1414 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1416 MpegEncContext *s = &s1->mpeg_enc_ctx;
1417 int color_description, w, h;
1419 skip_bits(&s->gb, 3); /* video format */
1420 color_description = get_bits1(&s->gb);
1421 if (color_description) {
1422 s->avctx->color_primaries = get_bits(&s->gb, 8);
1423 s->avctx->color_trc = get_bits(&s->gb, 8);
1424 s->avctx->colorspace = get_bits(&s->gb, 8);
1426 w = get_bits(&s->gb, 14);
1427 skip_bits(&s->gb, 1); //marker
1428 h = get_bits(&s->gb, 14);
1429 // remaining 3 bits are zero padding
1431 s1->pan_scan.width = 16 * w;
1432 s1->pan_scan.height = 16 * h;
1434 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1435 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1438 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1440 MpegEncContext *s = &s1->mpeg_enc_ctx;
1444 if (s->progressive_sequence) {
1445 if (s->repeat_first_field) {
1447 if (s->top_field_first)
1451 if (s->picture_structure == PICT_FRAME) {
1453 if (s->repeat_first_field)
1457 for (i = 0; i < nofco; i++) {
1458 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1459 skip_bits(&s->gb, 1); // marker
1460 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1461 skip_bits(&s->gb, 1); // marker
1464 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1465 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1466 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1467 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1468 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1471 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1475 for (i = 0; i < 64; i++) {
1476 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1477 int v = get_bits(&s->gb, 8);
1479 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1482 if (intra && i == 0 && v != 8) {
1483 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1484 v = 8; // needed by pink.mpg / issue1046
1493 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1495 av_dlog(s->avctx, "matrix extension\n");
1497 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1498 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1499 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1500 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1503 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1505 MpegEncContext *s = &s1->mpeg_enc_ctx;
1507 s->full_pel[0] = s->full_pel[1] = 0;
1508 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1509 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1510 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1511 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1512 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1513 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1514 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1515 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1516 s->pict_type = AV_PICTURE_TYPE_I;
1518 s->pict_type = AV_PICTURE_TYPE_P;
1520 s->pict_type = AV_PICTURE_TYPE_B;
1521 s->current_picture.f.pict_type = s->pict_type;
1522 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1524 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1525 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1526 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1527 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1529 s->intra_dc_precision = get_bits(&s->gb, 2);
1530 s->picture_structure = get_bits(&s->gb, 2);
1531 s->top_field_first = get_bits1(&s->gb);
1532 s->frame_pred_frame_dct = get_bits1(&s->gb);
1533 s->concealment_motion_vectors = get_bits1(&s->gb);
1534 s->q_scale_type = get_bits1(&s->gb);
1535 s->intra_vlc_format = get_bits1(&s->gb);
1536 s->alternate_scan = get_bits1(&s->gb);
1537 s->repeat_first_field = get_bits1(&s->gb);
1538 s->chroma_420_type = get_bits1(&s->gb);
1539 s->progressive_frame = get_bits1(&s->gb);
1542 if (s->alternate_scan) {
1543 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1544 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1546 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1547 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1550 /* composite display not parsed */
1551 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1552 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1553 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1554 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1555 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1556 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1557 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1558 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1559 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1562 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1564 AVCodecContext *avctx = s->avctx;
1565 Mpeg1Context *s1 = (Mpeg1Context*)s;
1567 /* start frame decoding */
1568 if (s->first_field || s->picture_structure == PICT_FRAME) {
1569 AVFrameSideData *pan_scan;
1571 if (ff_MPV_frame_start(s, avctx) < 0)
1574 ff_mpeg_er_frame_start(s);
1576 /* first check if we must repeat the frame */
1577 s->current_picture_ptr->f.repeat_pict = 0;
1578 if (s->repeat_first_field) {
1579 if (s->progressive_sequence) {
1580 if (s->top_field_first)
1581 s->current_picture_ptr->f.repeat_pict = 4;
1583 s->current_picture_ptr->f.repeat_pict = 2;
1584 } else if (s->progressive_frame) {
1585 s->current_picture_ptr->f.repeat_pict = 1;
1589 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1590 AV_FRAME_DATA_PANSCAN,
1591 sizeof(s1->pan_scan));
1593 return AVERROR(ENOMEM);
1594 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1596 if (s1->a53_caption) {
1597 AVFrameSideData *sd = av_frame_new_side_data(
1598 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1599 s1->a53_caption_size);
1601 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1602 av_freep(&s1->a53_caption);
1604 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1605 ff_thread_finish_setup(avctx);
1606 } else { // second field
1609 if (!s->current_picture_ptr) {
1610 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1614 if (s->avctx->hwaccel &&
1615 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1616 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1617 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1620 for (i = 0; i < 4; i++) {
1621 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1622 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1623 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1628 if (avctx->hwaccel) {
1629 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1634 FF_DISABLE_DEPRECATION_WARNINGS
1635 // MPV_frame_start will call this function too,
1636 // but we need to call it on every field
1637 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1638 if (ff_xvmc_field_start(s, avctx) < 0)
1640 FF_ENABLE_DEPRECATION_WARNINGS
1641 #endif /* FF_API_XVMC */
1646 #define DECODE_SLICE_ERROR -1
1647 #define DECODE_SLICE_OK 0
1651 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1652 * @return DECODE_SLICE_ERROR if the slice is damaged,
1653 * DECODE_SLICE_OK if this slice is OK
1655 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1656 const uint8_t **buf, int buf_size)
1658 AVCodecContext *avctx = s->avctx;
1659 const int lowres = s->avctx->lowres;
1660 const int field_pic = s->picture_structure != PICT_FRAME;
1663 s->resync_mb_y = -1;
1665 av_assert0(mb_y < s->mb_height);
1667 init_get_bits(&s->gb, *buf, buf_size * 8);
1668 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1669 skip_bits(&s->gb, 3);
1671 ff_mpeg1_clean_buffers(s);
1672 s->interlaced_dct = 0;
1674 s->qscale = get_qscale(s);
1676 if (s->qscale == 0) {
1677 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1681 /* extra slice info */
1682 if (skip_1stop_8data_bits(&s->gb) < 0)
1683 return AVERROR_INVALIDDATA;
1687 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1690 while (get_bits_left(&s->gb) > 0) {
1691 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1692 MBINCR_VLC_BITS, 2);
1694 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1701 /* otherwise, stuffing, nothing to do */
1709 if (s->mb_x >= (unsigned)s->mb_width) {
1710 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1714 if (avctx->hwaccel) {
1715 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1716 int start_code = -1;
1717 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1718 if (buf_end < *buf + buf_size)
1721 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1722 return DECODE_SLICE_ERROR;
1724 return DECODE_SLICE_OK;
1727 s->resync_mb_x = s->mb_x;
1728 s->resync_mb_y = s->mb_y = mb_y;
1730 ff_init_block_index(s);
1732 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1733 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1734 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",
1735 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],
1736 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")),
1737 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1738 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1739 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1745 FF_DISABLE_DEPRECATION_WARNINGS
1746 // If 1, we memcpy blocks in xvmcvideo.
1747 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1748 ff_xvmc_init_block(s); // set s->block
1749 FF_ENABLE_DEPRECATION_WARNINGS
1750 #endif /* FF_API_XVMC */
1752 if (mpeg_decode_mb(s, s->block) < 0)
1755 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1756 const int wrap = s->b8_stride;
1757 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1758 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1759 int motion_x, motion_y, dir, i;
1761 for (i = 0; i < 2; i++) {
1762 for (dir = 0; dir < 2; dir++) {
1763 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1764 motion_x = motion_y = 0;
1765 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1766 motion_x = s->mv[dir][0][0];
1767 motion_y = s->mv[dir][0][1];
1768 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1769 motion_x = s->mv[dir][i][0];
1770 motion_y = s->mv[dir][i][1];
1773 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1774 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1775 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1776 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1777 s->current_picture.ref_index [dir][b8_xy ] =
1778 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1779 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1786 s->dest[0] += 16 >> lowres;
1787 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1788 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1790 ff_MPV_decode_mb(s, s->block);
1792 if (++s->mb_x >= s->mb_width) {
1793 const int mb_size = 16 >> s->avctx->lowres;
1795 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1796 ff_MPV_report_decode_progress(s);
1799 s->mb_y += 1 << field_pic;
1801 if (s->mb_y >= s->mb_height) {
1802 int left = get_bits_left(&s->gb);
1803 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1804 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1805 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1807 if (left >= 32 && !is_d10) {
1808 GetBitContext gb = s->gb;
1809 align_get_bits(&gb);
1810 if (show_bits(&gb, 24) == 0x060E2B) {
1811 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1816 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1817 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1818 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1824 ff_init_block_index(s);
1827 /* skip mb handling */
1828 if (s->mb_skip_run == -1) {
1829 /* read increment again */
1832 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1833 MBINCR_VLC_BITS, 2);
1835 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1840 s->mb_skip_run += 33;
1841 } else if (code == 35) {
1842 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1843 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1846 goto eos; /* end of slice */
1848 /* otherwise, stuffing, nothing to do */
1850 s->mb_skip_run += code;
1854 if (s->mb_skip_run) {
1856 if (s->pict_type == AV_PICTURE_TYPE_I) {
1857 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1863 for (i = 0; i < 12; i++)
1864 s->block_last_index[i] = -1;
1865 if (s->picture_structure == PICT_FRAME)
1866 s->mv_type = MV_TYPE_16X16;
1868 s->mv_type = MV_TYPE_FIELD;
1869 if (s->pict_type == AV_PICTURE_TYPE_P) {
1870 /* if P type, zero motion vector is implied */
1871 s->mv_dir = MV_DIR_FORWARD;
1872 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1873 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1874 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1875 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1877 /* if B type, reuse previous vectors and directions */
1878 s->mv[0][0][0] = s->last_mv[0][0][0];
1879 s->mv[0][0][1] = s->last_mv[0][0][1];
1880 s->mv[1][0][0] = s->last_mv[1][0][0];
1881 s->mv[1][0][1] = s->last_mv[1][0][1];
1886 eos: // end of slice
1887 *buf += (get_bits_count(&s->gb)-1)/8;
1888 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1892 static int slice_decode_thread(AVCodecContext *c, void *arg)
1894 MpegEncContext *s = *(void**)arg;
1895 const uint8_t *buf = s->gb.buffer;
1896 int mb_y = s->start_mb_y;
1897 const int field_pic = s->picture_structure != PICT_FRAME;
1899 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1902 uint32_t start_code;
1905 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1907 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1908 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1909 s->start_mb_y, s->end_mb_y, s->er.error_count);
1911 if (c->err_recognition & AV_EF_EXPLODE)
1913 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1914 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);
1916 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);
1919 if (s->mb_y == s->end_mb_y)
1923 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1924 mb_y= start_code - SLICE_MIN_START_CODE;
1925 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1926 mb_y += (*buf&0xE0)<<2;
1928 if (s->picture_structure == PICT_BOTTOM_FIELD)
1930 if (mb_y < 0 || mb_y >= s->end_mb_y)
1936 * Handle slice ends.
1937 * @return 1 if it seems to be the last slice
1939 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1941 Mpeg1Context *s1 = avctx->priv_data;
1942 MpegEncContext *s = &s1->mpeg_enc_ctx;
1944 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1947 if (s->avctx->hwaccel) {
1948 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1949 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1953 FF_DISABLE_DEPRECATION_WARNINGS
1954 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1955 ff_xvmc_field_end(s);
1956 FF_ENABLE_DEPRECATION_WARNINGS
1957 #endif /* FF_API_XVMC */
1959 /* end of slice reached */
1960 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1963 ff_er_frame_end(&s->er);
1965 ff_MPV_frame_end(s);
1967 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1968 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1971 ff_print_debug_info(s, s->current_picture_ptr, pict);
1972 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1974 if (avctx->active_thread_type & FF_THREAD_FRAME)
1975 s->picture_number++;
1976 /* latency of 1 frame for I- and P-frames */
1977 /* XXX: use another variable than picture_number */
1978 if (s->last_picture_ptr != NULL) {
1979 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1982 ff_print_debug_info(s, s->last_picture_ptr, pict);
1983 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1993 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1994 const uint8_t *buf, int buf_size)
1996 Mpeg1Context *s1 = avctx->priv_data;
1997 MpegEncContext *s = &s1->mpeg_enc_ctx;
2001 init_get_bits(&s->gb, buf, buf_size*8);
2003 width = get_bits(&s->gb, 12);
2004 height = get_bits(&s->gb, 12);
2005 if (width == 0 || height == 0) {
2006 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
2008 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2009 return AVERROR_INVALIDDATA;
2011 s->aspect_ratio_info = get_bits(&s->gb, 4);
2012 if (s->aspect_ratio_info == 0) {
2013 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2014 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2017 s->frame_rate_index = get_bits(&s->gb, 4);
2018 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2020 s->bit_rate = get_bits(&s->gb, 18) * 400;
2021 if (get_bits1(&s->gb) == 0) /* marker */
2026 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2027 skip_bits(&s->gb, 1);
2030 if (get_bits1(&s->gb)) {
2031 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2033 for (i = 0; i < 64; i++) {
2034 j = s->dsp.idct_permutation[i];
2035 v = ff_mpeg1_default_intra_matrix[i];
2036 s->intra_matrix[j] = v;
2037 s->chroma_intra_matrix[j] = v;
2040 if (get_bits1(&s->gb)) {
2041 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2043 for (i = 0; i < 64; i++) {
2044 int j = s->dsp.idct_permutation[i];
2045 v = ff_mpeg1_default_non_intra_matrix[i];
2046 s->inter_matrix[j] = v;
2047 s->chroma_inter_matrix[j] = v;
2051 if (show_bits(&s->gb, 23) != 0) {
2052 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2056 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2057 s->progressive_sequence = 1;
2058 s->progressive_frame = 1;
2059 s->picture_structure = PICT_FRAME;
2061 s->frame_pred_frame_dct = 1;
2062 s->chroma_format = 1;
2063 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2064 s->out_format = FMT_MPEG1;
2065 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2066 if (s->flags & CODEC_FLAG_LOW_DELAY)
2069 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2070 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2071 s->avctx->rc_buffer_size, s->bit_rate);
2076 static int vcr2_init_sequence(AVCodecContext *avctx)
2078 Mpeg1Context *s1 = avctx->priv_data;
2079 MpegEncContext *s = &s1->mpeg_enc_ctx;
2082 /* start new MPEG-1 context decoding */
2083 s->out_format = FMT_MPEG1;
2084 if (s1->mpeg_enc_ctx_allocated) {
2085 ff_MPV_common_end(s);
2086 s1->mpeg_enc_ctx_allocated = 0;
2088 s->width = avctx->coded_width;
2089 s->height = avctx->coded_height;
2090 avctx->has_b_frames = 0; // true?
2093 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2094 setup_hwaccel_for_pixfmt(avctx);
2096 if (ff_MPV_common_init(s) < 0)
2098 s1->mpeg_enc_ctx_allocated = 1;
2100 for (i = 0; i < 64; i++) {
2101 int j = s->dsp.idct_permutation[i];
2102 v = ff_mpeg1_default_intra_matrix[i];
2103 s->intra_matrix[j] = v;
2104 s->chroma_intra_matrix[j] = v;
2106 v = ff_mpeg1_default_non_intra_matrix[i];
2107 s->inter_matrix[j] = v;
2108 s->chroma_inter_matrix[j] = v;
2111 s->progressive_sequence = 1;
2112 s->progressive_frame = 1;
2113 s->picture_structure = PICT_FRAME;
2115 s->frame_pred_frame_dct = 1;
2116 s->chroma_format = 1;
2117 if (s->codec_tag == AV_RL32("BW10")) {
2118 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2120 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2121 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2123 s1->save_width = s->width;
2124 s1->save_height = s->height;
2125 s1->save_progressive_seq = s->progressive_sequence;
2130 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2131 const uint8_t *p, int buf_size)
2133 Mpeg1Context *s1 = avctx->priv_data;
2135 if (buf_size >= 6 &&
2136 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2137 p[4] == 3 && (p[5] & 0x40)) {
2138 /* extract A53 Part 4 CC data */
2139 int cc_count = p[5] & 0x1f;
2140 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2141 av_freep(&s1->a53_caption);
2142 s1->a53_caption_size = cc_count * 3;
2143 s1->a53_caption = av_malloc(s1->a53_caption_size);
2144 if (s1->a53_caption) {
2145 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2149 } else if (buf_size >= 11 &&
2150 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2151 /* extract DVD CC data */
2154 // There is a caption count field in the data, but it is often
2155 // incorect. So count the number of captions present.
2156 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2158 // Transform the DVD format into A53 Part 4 format
2160 av_freep(&s1->a53_caption);
2161 s1->a53_caption_size = cc_count * 6;
2162 s1->a53_caption = av_malloc(s1->a53_caption_size);
2163 if (s1->a53_caption) {
2164 uint8_t field1 = !!(p[4] & 0x80);
2165 uint8_t *cap = s1->a53_caption;
2167 for (i = 0; i < cc_count; i++) {
2168 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2171 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2184 static void mpeg_decode_user_data(AVCodecContext *avctx,
2185 const uint8_t *p, int buf_size)
2187 Mpeg1Context *s = avctx->priv_data;
2188 const uint8_t *buf_end = p + buf_size;
2193 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2197 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2198 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2200 av_log(avctx, AV_LOG_ERROR, "\n");*/
2203 /* we parse the DTG active format information */
2204 if (buf_end - p >= 5 &&
2205 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2213 if (buf_end - p < 1)
2215 avctx->dtg_active_format = p[0] & 0x0f;
2217 } else if (buf_end - p >= 6 &&
2218 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2219 p[4] == 0x03) { // S3D_video_format_length
2220 // the 0x7F mask ignores the reserved_bit value
2221 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2223 if (S3D_video_format_type == 0x03 ||
2224 S3D_video_format_type == 0x04 ||
2225 S3D_video_format_type == 0x08 ||
2226 S3D_video_format_type == 0x23) {
2227 Mpeg1Context *s1 = avctx->priv_data;
2228 MpegEncContext *s = &s1->mpeg_enc_ctx;
2230 if (!s->current_picture_ptr)
2233 stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2237 switch (S3D_video_format_type) {
2239 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2242 stereo->type = AV_STEREO3D_TOPBOTTOM;
2245 stereo->type = AV_STEREO3D_2D;
2248 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2252 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2257 static void mpeg_decode_gop(AVCodecContext *avctx,
2258 const uint8_t *buf, int buf_size)
2260 Mpeg1Context *s1 = avctx->priv_data;
2261 MpegEncContext *s = &s1->mpeg_enc_ctx;
2265 init_get_bits(&s->gb, buf, buf_size*8);
2267 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2269 s->closed_gop = get_bits1(&s->gb);
2270 /*broken_link indicate that after editing the
2271 reference frames of the first B-Frames after GOP I-Frame
2272 are missing (open gop)*/
2273 broken_link = get_bits1(&s->gb);
2275 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2276 char tcbuf[AV_TIMECODE_STR_SIZE];
2277 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2278 av_log(s->avctx, AV_LOG_DEBUG,
2279 "GOP (%s) closed_gop=%d broken_link=%d\n",
2280 tcbuf, s->closed_gop, broken_link);
2284 static int decode_chunks(AVCodecContext *avctx,
2285 AVFrame *picture, int *got_output,
2286 const uint8_t *buf, int buf_size)
2288 Mpeg1Context *s = avctx->priv_data;
2289 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2290 const uint8_t *buf_ptr = buf;
2291 const uint8_t *buf_end = buf + buf_size;
2292 int ret, input_size;
2293 int last_code = 0, skip_frame = 0;
2294 int picture_start_code_seen = 0;
2297 /* find next start code */
2298 uint32_t start_code = -1;
2299 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2300 if (start_code > 0x1ff) {
2302 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2305 av_assert0(avctx->thread_count > 1);
2307 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2308 for (i = 0; i < s->slice_count; i++)
2309 s2->er.error_count += s2->thread_context[i]->er.error_count;
2312 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2313 && uses_vdpau(avctx))
2314 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2316 ret = slice_end(avctx, picture);
2320 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2326 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2327 return AVERROR_INVALIDDATA;
2329 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2332 input_size = buf_end - buf_ptr;
2334 if (avctx->debug & FF_DEBUG_STARTCODE) {
2335 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2338 /* prepare data for next start code */
2339 switch (start_code) {
2340 case SEQ_START_CODE:
2341 if (last_code == 0) {
2342 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2343 if(buf != avctx->extradata)
2346 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2347 if (avctx->err_recognition & AV_EF_EXPLODE)
2348 return AVERROR_INVALIDDATA;
2352 case PICTURE_START_CODE:
2353 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2354 /* If it's a frame picture, there can't be more than one picture header.
2355 Yet, it does happen and we need to handle it. */
2356 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2359 picture_start_code_seen = 1;
2361 if (s2->width <= 0 || s2->height <= 0) {
2362 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2363 s2->width, s2->height);
2364 return AVERROR_INVALIDDATA;
2368 s2->intra_dc_precision= 3;
2369 s2->intra_matrix[0]= 1;
2371 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2372 !avctx->hwaccel && s->slice_count) {
2375 avctx->execute(avctx, slice_decode_thread,
2376 s2->thread_context, NULL,
2377 s->slice_count, sizeof(void*));
2378 for (i = 0; i < s->slice_count; i++)
2379 s2->er.error_count += s2->thread_context[i]->er.error_count;
2382 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2383 ret = mpeg_decode_postinit(avctx);
2385 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2389 /* we have a complete image: we try to decompress it */
2390 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2393 last_code = PICTURE_START_CODE;
2395 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2396 if (avctx->err_recognition & AV_EF_EXPLODE)
2397 return AVERROR_INVALIDDATA;
2400 case EXT_START_CODE:
2401 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2403 switch (get_bits(&s2->gb, 4)) {
2405 if (last_code == 0) {
2406 mpeg_decode_sequence_extension(s);
2408 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2409 if (avctx->err_recognition & AV_EF_EXPLODE)
2410 return AVERROR_INVALIDDATA;
2414 mpeg_decode_sequence_display_extension(s);
2417 mpeg_decode_quant_matrix_extension(s2);
2420 mpeg_decode_picture_display_extension(s);
2423 if (last_code == PICTURE_START_CODE) {
2424 mpeg_decode_picture_coding_extension(s);
2426 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2427 if (avctx->err_recognition & AV_EF_EXPLODE)
2428 return AVERROR_INVALIDDATA;
2433 case USER_START_CODE:
2434 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2436 case GOP_START_CODE:
2437 if (last_code == 0) {
2439 mpeg_decode_gop(avctx, buf_ptr, input_size);
2442 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2443 if (avctx->err_recognition & AV_EF_EXPLODE)
2444 return AVERROR_INVALIDDATA;
2448 if (start_code >= SLICE_MIN_START_CODE &&
2449 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2451 if (s2->progressive_sequence && !s2->progressive_frame) {
2452 s2->progressive_frame = 1;
2453 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2456 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2457 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2458 s2->picture_structure = PICT_FRAME;
2461 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2462 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2465 if (s2->picture_structure == PICT_FRAME) {
2466 s2->first_field = 0;
2467 s2->v_edge_pos = 16 * s2->mb_height;
2469 s2->first_field ^= 1;
2470 s2->v_edge_pos = 8 * s2->mb_height;
2471 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2474 if (start_code >= SLICE_MIN_START_CODE &&
2475 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2476 const int field_pic = s2->picture_structure != PICT_FRAME;
2477 int mb_y = start_code - SLICE_MIN_START_CODE;
2478 last_code = SLICE_MIN_START_CODE;
2479 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2480 mb_y += (*buf_ptr&0xE0)<<2;
2483 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2486 if (buf_end - buf_ptr < 2) {
2487 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2488 return AVERROR_INVALIDDATA;
2491 if (mb_y >= s2->mb_height) {
2492 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2496 if (s2->last_picture_ptr == NULL) {
2497 /* Skip B-frames if we do not have reference frames and gop is not closed */
2498 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2499 if (!s2->closed_gop) {
2505 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2507 if (s2->next_picture_ptr == NULL) {
2508 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2509 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2514 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2515 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2516 avctx->skip_frame >= AVDISCARD_ALL) {
2521 if (!s->mpeg_enc_ctx_allocated)
2524 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2525 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2529 if (!s2->pict_type) {
2530 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2531 if (avctx->err_recognition & AV_EF_EXPLODE)
2532 return AVERROR_INVALIDDATA;
2536 if (s->first_slice) {
2539 if (mpeg_field_start(s2, buf, buf_size) < 0)
2542 if (!s2->current_picture_ptr) {
2543 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2544 return AVERROR_INVALIDDATA;
2547 if (uses_vdpau(avctx)) {
2552 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2554 int threshold = (s2->mb_height * s->slice_count +
2555 s2->slice_context_count / 2) /
2556 s2->slice_context_count;
2557 av_assert0(avctx->thread_count > 1);
2558 if (threshold <= mb_y) {
2559 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2561 thread_context->start_mb_y = mb_y;
2562 thread_context->end_mb_y = s2->mb_height;
2563 if (s->slice_count) {
2564 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2565 ret = ff_update_duplicate_context(thread_context,
2570 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2573 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2575 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2579 if (avctx->err_recognition & AV_EF_EXPLODE)
2581 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2582 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);
2584 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);
2593 static int mpeg_decode_frame(AVCodecContext *avctx,
2594 void *data, int *got_output,
2597 const uint8_t *buf = avpkt->data;
2599 int buf_size = avpkt->size;
2600 Mpeg1Context *s = avctx->priv_data;
2601 AVFrame *picture = data;
2602 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2603 av_dlog(avctx, "fill_buffer\n");
2605 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2606 /* special case for last picture */
2607 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2608 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2612 s2->next_picture_ptr = NULL;
2619 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2620 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2622 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2626 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2627 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2628 || s2->codec_tag == AV_RL32("BW10")
2630 vcr2_init_sequence(avctx);
2634 if (avctx->extradata && !s->extradata_decoded) {
2635 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2637 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2640 s->extradata_decoded = 1;
2641 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2642 s2->current_picture_ptr = NULL;
2647 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2648 if (ret<0 || *got_output)
2649 s2->current_picture_ptr = NULL;
2655 static void flush(AVCodecContext *avctx)
2657 Mpeg1Context *s = avctx->priv_data;
2661 ff_mpeg_flush(avctx);
2664 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2666 Mpeg1Context *s = avctx->priv_data;
2668 if (s->mpeg_enc_ctx_allocated)
2669 ff_MPV_common_end(&s->mpeg_enc_ctx);
2670 av_freep(&s->a53_caption);
2674 static const AVProfile mpeg2_video_profiles[] = {
2675 { FF_PROFILE_MPEG2_422, "4:2:2" },
2676 { FF_PROFILE_MPEG2_HIGH, "High" },
2677 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2678 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2679 { FF_PROFILE_MPEG2_MAIN, "Main" },
2680 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2681 { FF_PROFILE_RESERVED, "Reserved" },
2682 { FF_PROFILE_RESERVED, "Reserved" },
2683 { FF_PROFILE_UNKNOWN },
2687 AVCodec ff_mpeg1video_decoder = {
2688 .name = "mpeg1video",
2689 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2690 .type = AVMEDIA_TYPE_VIDEO,
2691 .id = AV_CODEC_ID_MPEG1VIDEO,
2692 .priv_data_size = sizeof(Mpeg1Context),
2693 .init = mpeg_decode_init,
2694 .close = mpeg_decode_end,
2695 .decode = mpeg_decode_frame,
2696 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2697 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2698 CODEC_CAP_SLICE_THREADS,
2701 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2704 AVCodec ff_mpeg2video_decoder = {
2705 .name = "mpeg2video",
2706 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2707 .type = AVMEDIA_TYPE_VIDEO,
2708 .id = AV_CODEC_ID_MPEG2VIDEO,
2709 .priv_data_size = sizeof(Mpeg1Context),
2710 .init = mpeg_decode_init,
2711 .close = mpeg_decode_end,
2712 .decode = mpeg_decode_frame,
2713 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2714 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2715 CODEC_CAP_SLICE_THREADS,
2718 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2722 AVCodec ff_mpegvideo_decoder = {
2723 .name = "mpegvideo",
2724 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2725 .type = AVMEDIA_TYPE_VIDEO,
2726 .id = AV_CODEC_ID_MPEG2VIDEO,
2727 .priv_data_size = sizeof(Mpeg1Context),
2728 .init = mpeg_decode_init,
2729 .close = mpeg_decode_end,
2730 .decode = mpeg_decode_frame,
2731 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2737 #if CONFIG_MPEG_XVMC_DECODER
2738 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2740 if (avctx->active_thread_type & FF_THREAD_SLICE)
2742 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2744 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2745 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2747 mpeg_decode_init(avctx);
2749 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2750 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2755 AVCodec ff_mpeg_xvmc_decoder = {
2756 .name = "mpegvideo_xvmc",
2757 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2758 .type = AVMEDIA_TYPE_VIDEO,
2759 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2760 .priv_data_size = sizeof(Mpeg1Context),
2761 .init = mpeg_mc_decode_init,
2762 .close = mpeg_decode_end,
2763 .decode = mpeg_decode_frame,
2764 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2765 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2770 #endif /* FF_API_XVMC */
2772 #if CONFIG_MPEG_VDPAU_DECODER
2773 AVCodec ff_mpeg_vdpau_decoder = {
2774 .name = "mpegvideo_vdpau",
2775 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2776 .type = AVMEDIA_TYPE_VIDEO,
2777 .id = AV_CODEC_ID_MPEG2VIDEO,
2778 .priv_data_size = sizeof(Mpeg1Context),
2779 .init = mpeg_decode_init,
2780 .close = mpeg_decode_end,
2781 .decode = mpeg_decode_frame,
2782 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2783 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2788 #if CONFIG_MPEG1_VDPAU_DECODER
2789 AVCodec ff_mpeg1_vdpau_decoder = {
2790 .name = "mpeg1video_vdpau",
2791 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2792 .type = AVMEDIA_TYPE_VIDEO,
2793 .id = AV_CODEC_ID_MPEG1VIDEO,
2794 .priv_data_size = sizeof(Mpeg1Context),
2795 .init = mpeg_decode_init,
2796 .close = mpeg_decode_end,
2797 .decode = mpeg_decode_frame,
2798 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2799 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,