3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 "xvmc_internal.h"
43 typedef struct Mpeg1Context {
44 MpegEncContext mpeg_enc_ctx;
45 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
46 int repeat_field; /* true if we must repeat the field */
47 AVPanScan pan_scan; /**< some temporary storage for the panscan */
52 int save_width, save_height, save_progressive_seq;
53 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
54 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
55 int closed_gop; ///< GOP is closed
57 int extradata_decoded;
60 #define MB_TYPE_ZERO_MV 0x20000000
62 static const uint32_t ptype2mb_type[7] = {
64 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
66 MB_TYPE_L0 | MB_TYPE_CBP,
67 MB_TYPE_QUANT | MB_TYPE_INTRA,
68 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
69 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
72 static const uint32_t btype2mb_type[11] = {
75 MB_TYPE_L1 | MB_TYPE_CBP,
77 MB_TYPE_L0 | MB_TYPE_CBP,
79 MB_TYPE_L0L1 | MB_TYPE_CBP,
80 MB_TYPE_QUANT | MB_TYPE_INTRA,
81 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
82 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
83 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
86 static const uint8_t non_linear_qscale[32] = {
87 0, 1, 2, 3, 4, 5, 6, 7,
88 8,10,12,14,16,18,20,22,
89 24,28,32,36,40,44,48,52,
90 56,64,72,80,88,96,104,112,
93 /* as H.263, but only 17 codes */
94 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
96 int code, sign, val, shift;
98 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
106 sign = get_bits1(&s->gb);
110 val = (val - 1) << shift;
111 val |= get_bits(&s->gb, shift);
118 /* modulo decoding */
119 return sign_extend(val, 5 + shift);
122 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
124 int level, dc, diff, i, j, run;
126 RLTable *rl = &ff_rl_mpeg1;
127 uint8_t * const scantable = s->intra_scantable.permutated;
128 const uint16_t *quant_matrix = s->intra_matrix;
129 const int qscale = s->qscale;
132 component = (n <= 3 ? 0 : n - 4 + 1);
133 diff = decode_dc(&s->gb, component);
136 dc = s->last_dc[component];
138 s->last_dc[component] = dc;
139 block[0] = dc * quant_matrix[0];
140 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
143 OPEN_READER(re, &s->gb);
144 /* now quantify & encode AC coefficients */
146 UPDATE_CACHE(re, &s->gb);
147 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
151 } else if (level != 0) {
154 level = (level * qscale * quant_matrix[j]) >> 4;
155 level = (level - 1) | 1;
156 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
157 LAST_SKIP_BITS(re, &s->gb, 1);
160 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
161 UPDATE_CACHE(re, &s->gb);
162 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
164 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
165 } else if (level == 0) {
166 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
172 level = (level * qscale * quant_matrix[j]) >> 4;
173 level = (level - 1) | 1;
176 level = (level * qscale * quant_matrix[j]) >> 4;
177 level = (level - 1) | 1;
181 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
187 CLOSE_READER(re, &s->gb);
189 s->block_last_index[n] = i;
193 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
195 return mpeg1_decode_block_intra(s, block, n);
198 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
200 int level, i, j, run;
201 RLTable *rl = &ff_rl_mpeg1;
202 uint8_t * const scantable = s->intra_scantable.permutated;
203 const uint16_t *quant_matrix = s->inter_matrix;
204 const int qscale = s->qscale;
207 OPEN_READER(re, &s->gb);
209 // special case for first coefficient, no need to add second VLC table
210 UPDATE_CACHE(re, &s->gb);
211 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
212 level = (3 * qscale * quant_matrix[0]) >> 5;
213 level = (level - 1) | 1;
214 if (GET_CACHE(re, &s->gb) & 0x40000000)
218 SKIP_BITS(re, &s->gb, 2);
219 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
222 /* now quantify & encode AC coefficients */
224 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
229 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
230 level = (level - 1) | 1;
231 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
232 SKIP_BITS(re, &s->gb, 1);
235 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
236 UPDATE_CACHE(re, &s->gb);
237 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
239 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
240 } else if (level == 0) {
241 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
247 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
248 level = (level - 1) | 1;
251 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
252 level = (level - 1) | 1;
256 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
261 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
263 UPDATE_CACHE(re, &s->gb);
266 LAST_SKIP_BITS(re, &s->gb, 2);
267 CLOSE_READER(re, &s->gb);
269 s->block_last_index[n] = i;
273 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
275 int level, i, j, run;
276 RLTable *rl = &ff_rl_mpeg1;
277 uint8_t * const scantable = s->intra_scantable.permutated;
278 const int qscale = s->qscale;
281 OPEN_READER(re, &s->gb);
283 // special case for first coefficient, no need to add second VLC table
284 UPDATE_CACHE(re, &s->gb);
285 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
286 level = (3 * qscale) >> 1;
287 level = (level - 1) | 1;
288 if (GET_CACHE(re, &s->gb) & 0x40000000)
292 SKIP_BITS(re, &s->gb, 2);
293 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
297 /* now quantify & encode AC coefficients */
299 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
304 level = ((level * 2 + 1) * qscale) >> 1;
305 level = (level - 1) | 1;
306 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
307 SKIP_BITS(re, &s->gb, 1);
310 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
311 UPDATE_CACHE(re, &s->gb);
312 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
314 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
315 } else if (level == 0) {
316 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
322 level = ((level * 2 + 1) * qscale) >> 1;
323 level = (level - 1) | 1;
326 level = ((level * 2 + 1) * qscale) >> 1;
327 level = (level - 1) | 1;
332 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
334 UPDATE_CACHE(re, &s->gb);
337 LAST_SKIP_BITS(re, &s->gb, 2);
338 CLOSE_READER(re, &s->gb);
340 s->block_last_index[n] = i;
345 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
347 int level, i, j, run;
348 RLTable *rl = &ff_rl_mpeg1;
349 uint8_t * const scantable = s->intra_scantable.permutated;
350 const uint16_t *quant_matrix;
351 const int qscale = s->qscale;
357 OPEN_READER(re, &s->gb);
360 quant_matrix = s->inter_matrix;
362 quant_matrix = s->chroma_inter_matrix;
364 // special case for first coefficient, no need to add second VLC table
365 UPDATE_CACHE(re, &s->gb);
366 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
367 level= (3 * qscale * quant_matrix[0]) >> 5;
368 if (GET_CACHE(re, &s->gb) & 0x40000000)
373 SKIP_BITS(re, &s->gb, 2);
374 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
378 /* now quantify & encode AC coefficients */
380 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
385 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
386 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
387 SKIP_BITS(re, &s->gb, 1);
390 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
391 UPDATE_CACHE(re, &s->gb);
392 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
397 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
400 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
404 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
410 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
412 UPDATE_CACHE(re, &s->gb);
415 LAST_SKIP_BITS(re, &s->gb, 2);
416 CLOSE_READER(re, &s->gb);
418 block[63] ^= (mismatch & 1);
420 s->block_last_index[n] = i;
424 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
425 int16_t *block, int n)
427 int level, i, j, run;
428 RLTable *rl = &ff_rl_mpeg1;
429 uint8_t * const scantable = s->intra_scantable.permutated;
430 const int qscale = s->qscale;
431 OPEN_READER(re, &s->gb);
434 // special case for first coefficient, no need to add second VLC table
435 UPDATE_CACHE(re, &s->gb);
436 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
437 level = (3 * qscale) >> 1;
438 if (GET_CACHE(re, &s->gb) & 0x40000000)
442 SKIP_BITS(re, &s->gb, 2);
443 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
447 /* now quantify & encode AC coefficients */
449 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
454 level = ((level * 2 + 1) * qscale) >> 1;
455 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
456 SKIP_BITS(re, &s->gb, 1);
459 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
460 UPDATE_CACHE(re, &s->gb);
461 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
466 level = ((-level * 2 + 1) * qscale) >> 1;
469 level = ((level * 2 + 1) * qscale) >> 1;
474 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
476 UPDATE_CACHE(re, &s->gb);
479 LAST_SKIP_BITS(re, &s->gb, 2);
480 CLOSE_READER(re, &s->gb);
481 s->block_last_index[n] = i;
486 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
488 int level, dc, diff, i, j, run;
491 uint8_t * const scantable = s->intra_scantable.permutated;
492 const uint16_t *quant_matrix;
493 const int qscale = s->qscale;
498 quant_matrix = s->intra_matrix;
501 quant_matrix = s->chroma_intra_matrix;
502 component = (n & 1) + 1;
504 diff = decode_dc(&s->gb, component);
507 dc = s->last_dc[component];
509 s->last_dc[component] = dc;
510 block[0] = dc << (3 - s->intra_dc_precision);
511 av_dlog(s->avctx, "dc=%d\n", block[0]);
512 mismatch = block[0] ^ 1;
514 if (s->intra_vlc_format)
520 OPEN_READER(re, &s->gb);
521 /* now quantify & encode AC coefficients */
523 UPDATE_CACHE(re, &s->gb);
524 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
528 } else if (level != 0) {
531 level = (level * qscale * quant_matrix[j]) >> 4;
532 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
533 LAST_SKIP_BITS(re, &s->gb, 1);
536 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
537 UPDATE_CACHE(re, &s->gb);
538 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
542 level = (-level * qscale * quant_matrix[j]) >> 4;
545 level = (level * qscale * quant_matrix[j]) >> 4;
549 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
556 CLOSE_READER(re, &s->gb);
558 block[63] ^= mismatch & 1;
560 s->block_last_index[n] = i;
564 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
566 int level, dc, diff, j, run;
569 uint8_t * scantable = s->intra_scantable.permutated;
570 const uint16_t *quant_matrix;
571 const int qscale = s->qscale;
575 quant_matrix = s->intra_matrix;
578 quant_matrix = s->chroma_intra_matrix;
579 component = (n & 1) + 1;
581 diff = decode_dc(&s->gb, component);
584 dc = s->last_dc[component];
586 s->last_dc[component] = dc;
587 block[0] = dc << (3 - s->intra_dc_precision);
588 if (s->intra_vlc_format)
594 OPEN_READER(re, &s->gb);
595 /* now quantify & encode AC coefficients */
597 UPDATE_CACHE(re, &s->gb);
598 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
602 } else if (level != 0) {
605 level = (level * qscale * quant_matrix[j]) >> 4;
606 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
607 LAST_SKIP_BITS(re, &s->gb, 1);
610 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
611 UPDATE_CACHE(re, &s->gb);
612 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
616 level = (-level * qscale * quant_matrix[j]) >> 4;
619 level = (level * qscale * quant_matrix[j]) >> 4;
625 CLOSE_READER(re, &s->gb);
628 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
632 /******************************************/
635 static inline int get_dmv(MpegEncContext *s)
637 if (get_bits1(&s->gb))
638 return 1 - (get_bits1(&s->gb) << 1);
643 static inline int get_qscale(MpegEncContext *s)
645 int qscale = get_bits(&s->gb, 5);
646 if (s->q_scale_type) {
647 return non_linear_qscale[qscale];
653 /* motion type (for MPEG-2) */
659 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
661 int i, j, k, cbp, val, mb_type, motion_type;
662 const int mb_block_count = 4 + (1 << s->chroma_format);
664 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
666 assert(s->mb_skipped == 0);
668 if (s->mb_skip_run-- != 0) {
669 if (s->pict_type == AV_PICTURE_TYPE_P) {
671 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
676 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
678 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
679 if (IS_INTRA(mb_type))
681 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
682 mb_type | MB_TYPE_SKIP;
683 // assert(s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
685 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
692 switch (s->pict_type) {
694 case AV_PICTURE_TYPE_I:
695 if (get_bits1(&s->gb) == 0) {
696 if (get_bits1(&s->gb) == 0) {
697 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
700 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
702 mb_type = MB_TYPE_INTRA;
705 case AV_PICTURE_TYPE_P:
706 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
708 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
711 mb_type = ptype2mb_type[mb_type];
713 case AV_PICTURE_TYPE_B:
714 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
716 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
719 mb_type = btype2mb_type[mb_type];
722 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
723 // motion_type = 0; /* avoid warning */
724 if (IS_INTRA(mb_type)) {
725 s->dsp.clear_blocks(s->block[0]);
727 if (!s->chroma_y_shift) {
728 s->dsp.clear_blocks(s->block[6]);
731 /* compute DCT type */
732 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
733 !s->frame_pred_frame_dct) {
734 s->interlaced_dct = get_bits1(&s->gb);
737 if (IS_QUANT(mb_type))
738 s->qscale = get_qscale(s);
740 if (s->concealment_motion_vectors) {
741 /* just parse them */
742 if (s->picture_structure != PICT_FRAME)
743 skip_bits1(&s->gb); /* field select */
745 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
746 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
747 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
748 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
750 skip_bits1(&s->gb); /* marker */
752 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
755 FF_DISABLE_DEPRECATION_WARNINGS
756 // if 1, we memcpy blocks in xvmcvideo
757 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
758 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
760 FF_ENABLE_DEPRECATION_WARNINGS
761 #endif /* FF_API_XVMC */
763 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
764 if (s->flags2 & CODEC_FLAG2_FAST) {
765 for (i = 0; i < 6; i++) {
766 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
769 for (i = 0; i < mb_block_count; i++) {
770 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
775 for (i = 0; i < 6; i++) {
776 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
781 if (mb_type & MB_TYPE_ZERO_MV) {
782 assert(mb_type & MB_TYPE_CBP);
784 s->mv_dir = MV_DIR_FORWARD;
785 if (s->picture_structure == PICT_FRAME) {
786 if (!s->frame_pred_frame_dct)
787 s->interlaced_dct = get_bits1(&s->gb);
788 s->mv_type = MV_TYPE_16X16;
790 s->mv_type = MV_TYPE_FIELD;
791 mb_type |= MB_TYPE_INTERLACED;
792 s->field_select[0][0] = s->picture_structure - 1;
795 if (IS_QUANT(mb_type))
796 s->qscale = get_qscale(s);
798 s->last_mv[0][0][0] = 0;
799 s->last_mv[0][0][1] = 0;
800 s->last_mv[0][1][0] = 0;
801 s->last_mv[0][1][1] = 0;
805 assert(mb_type & MB_TYPE_L0L1);
806 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
807 /* get additional motion vector type */
808 if (s->frame_pred_frame_dct)
809 motion_type = MT_FRAME;
811 motion_type = get_bits(&s->gb, 2);
812 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
813 s->interlaced_dct = get_bits1(&s->gb);
816 if (IS_QUANT(mb_type))
817 s->qscale = get_qscale(s);
820 s->mv_dir = (mb_type >> 13) & 3;
821 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
822 switch (motion_type) {
823 case MT_FRAME: /* or MT_16X8 */
824 if (s->picture_structure == PICT_FRAME) {
825 mb_type |= MB_TYPE_16x16;
826 s->mv_type = MV_TYPE_16X16;
827 for (i = 0; i < 2; i++) {
828 if (USES_LIST(mb_type, i)) {
830 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
831 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
832 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
833 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
834 /* full_pel: only for MPEG-1 */
835 if (s->full_pel[i]) {
836 s->mv[i][0][0] <<= 1;
837 s->mv[i][0][1] <<= 1;
842 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
843 s->mv_type = MV_TYPE_16X8;
844 for (i = 0; i < 2; i++) {
845 if (USES_LIST(mb_type, i)) {
847 for (j = 0; j < 2; j++) {
848 s->field_select[i][j] = get_bits1(&s->gb);
849 for (k = 0; k < 2; k++) {
850 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
851 s->last_mv[i][j][k]);
852 s->last_mv[i][j][k] = val;
853 s->mv[i][j][k] = val;
861 s->mv_type = MV_TYPE_FIELD;
862 if (s->picture_structure == PICT_FRAME) {
863 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
864 for (i = 0; i < 2; i++) {
865 if (USES_LIST(mb_type, i)) {
866 for (j = 0; j < 2; j++) {
867 s->field_select[i][j] = get_bits1(&s->gb);
868 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
869 s->last_mv[i][j][0]);
870 s->last_mv[i][j][0] = val;
871 s->mv[i][j][0] = val;
872 av_dlog(s->avctx, "fmx=%d\n", val);
873 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
874 s->last_mv[i][j][1] >> 1);
875 s->last_mv[i][j][1] = val << 1;
876 s->mv[i][j][1] = val;
877 av_dlog(s->avctx, "fmy=%d\n", val);
882 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
883 for (i = 0; i < 2; i++) {
884 if (USES_LIST(mb_type, i)) {
885 s->field_select[i][0] = get_bits1(&s->gb);
886 for (k = 0; k < 2; k++) {
887 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
888 s->last_mv[i][0][k]);
889 s->last_mv[i][0][k] = val;
890 s->last_mv[i][1][k] = val;
891 s->mv[i][0][k] = val;
898 s->mv_type = MV_TYPE_DMV;
899 for (i = 0; i < 2; i++) {
900 if (USES_LIST(mb_type, i)) {
901 int dmx, dmy, mx, my, m;
902 const int my_shift = s->picture_structure == PICT_FRAME;
904 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
905 s->last_mv[i][0][0]);
906 s->last_mv[i][0][0] = mx;
907 s->last_mv[i][1][0] = mx;
909 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
910 s->last_mv[i][0][1] >> my_shift);
914 s->last_mv[i][0][1] = my << my_shift;
915 s->last_mv[i][1][1] = my << my_shift;
919 s->mv[i][1][0] = mx; // not used
920 s->mv[i][1][1] = my; // not used
922 if (s->picture_structure == PICT_FRAME) {
923 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
925 // m = 1 + 2 * s->top_field_first;
926 m = s->top_field_first ? 1 : 3;
928 /* top -> top pred */
929 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
930 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
932 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
933 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
935 mb_type |= MB_TYPE_16x16;
937 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
938 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
939 if (s->picture_structure == PICT_TOP_FIELD)
948 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
954 if (HAS_CBP(mb_type)) {
955 s->dsp.clear_blocks(s->block[0]);
957 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
958 if (mb_block_count > 6) {
959 cbp <<= mb_block_count - 6;
960 cbp |= get_bits(&s->gb, mb_block_count - 6);
961 s->dsp.clear_blocks(s->block[6]);
964 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
969 FF_DISABLE_DEPRECATION_WARNINGS
970 //if 1, we memcpy blocks in xvmcvideo
971 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
972 ff_xvmc_pack_pblocks(s, cbp);
974 FF_ENABLE_DEPRECATION_WARNINGS
975 #endif /* FF_API_XVMC */
977 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
978 if (s->flags2 & CODEC_FLAG2_FAST) {
979 for (i = 0; i < 6; i++) {
981 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
983 s->block_last_index[i] = -1;
988 cbp <<= 12-mb_block_count;
990 for (i = 0; i < mb_block_count; i++) {
991 if (cbp & (1 << 11)) {
992 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
995 s->block_last_index[i] = -1;
1001 if (s->flags2 & CODEC_FLAG2_FAST) {
1002 for (i = 0; i < 6; i++) {
1004 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1006 s->block_last_index[i] = -1;
1011 for (i = 0; i < 6; i++) {
1013 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1016 s->block_last_index[i] = -1;
1023 for (i = 0; i < 12; i++)
1024 s->block_last_index[i] = -1;
1028 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1033 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1035 Mpeg1Context *s = avctx->priv_data;
1036 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1039 /* we need some permutation to store matrices,
1040 * until MPV_common_init() sets the real permutation. */
1041 for (i = 0; i < 64; i++)
1042 s2->dsp.idct_permutation[i]=i;
1044 ff_MPV_decode_defaults(s2);
1046 s->mpeg_enc_ctx.avctx = avctx;
1047 s->mpeg_enc_ctx.flags = avctx->flags;
1048 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1049 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1050 ff_mpeg12_init_vlcs();
1052 s->mpeg_enc_ctx_allocated = 0;
1053 s->mpeg_enc_ctx.picture_number = 0;
1054 s->repeat_field = 0;
1055 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1056 avctx->color_range = AVCOL_RANGE_MPEG;
1057 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1058 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1060 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1064 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1066 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1067 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1070 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1073 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1074 if (err) return err;
1076 if (!ctx->mpeg_enc_ctx_allocated)
1077 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1079 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1080 s->picture_number++;
1085 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1086 const uint8_t *new_perm)
1088 uint16_t temp_matrix[64];
1091 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1093 for (i = 0; i < 64; i++) {
1094 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1099 static const enum AVPixelFormat pixfmt_xvmc_mpg2_420[] = {
1100 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1101 AV_PIX_FMT_XVMC_MPEG2_MC,
1103 #endif /* FF_API_XVMC */
1105 static const enum AVPixelFormat mpeg12_hwaccel_pixfmt_list_420[] = {
1106 #if CONFIG_MPEG2_DXVA2_HWACCEL
1107 AV_PIX_FMT_DXVA2_VLD,
1109 #if CONFIG_MPEG2_VAAPI_HWACCEL
1110 AV_PIX_FMT_VAAPI_VLD,
1112 #if CONFIG_MPEG1_VDPAU_HWACCEL | CONFIG_MPEG2_VDPAU_HWACCEL
1119 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1121 Mpeg1Context *s1 = avctx->priv_data;
1122 MpegEncContext *s = &s1->mpeg_enc_ctx;
1125 FF_DISABLE_DEPRECATION_WARNINGS
1126 if (avctx->xvmc_acceleration)
1127 return avctx->get_format(avctx, pixfmt_xvmc_mpg2_420);
1128 FF_ENABLE_DEPRECATION_WARNINGS
1129 #endif /* FF_API_XVMC */
1131 if (s->chroma_format < 2)
1132 return avctx->get_format(avctx, mpeg12_hwaccel_pixfmt_list_420);
1133 else if (s->chroma_format == 2)
1134 return AV_PIX_FMT_YUV422P;
1136 return AV_PIX_FMT_YUV444P;
1139 /* Call this function when we know all parameters.
1140 * It may be called in different places for MPEG-1 and MPEG-2. */
1141 static int mpeg_decode_postinit(AVCodecContext *avctx)
1143 Mpeg1Context *s1 = avctx->priv_data;
1144 MpegEncContext *s = &s1->mpeg_enc_ctx;
1145 uint8_t old_permutation[64];
1148 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1149 avctx->coded_width != s->width ||
1150 avctx->coded_height != s->height ||
1151 s1->save_width != s->width ||
1152 s1->save_height != s->height ||
1153 s1->save_aspect_info != s->aspect_ratio_info ||
1154 s1->save_progressive_seq != s->progressive_sequence ||
1158 if (s1->mpeg_enc_ctx_allocated) {
1159 ParseContext pc = s->parse_context;
1160 s->parse_context.buffer = 0;
1161 ff_MPV_common_end(s);
1162 s->parse_context = pc;
1165 if ((s->width == 0) || (s->height == 0))
1168 ret = ff_set_dimensions(avctx, s->width, s->height);
1172 avctx->bit_rate = s->bit_rate;
1173 s1->save_aspect_info = s->aspect_ratio_info;
1174 s1->save_width = s->width;
1175 s1->save_height = s->height;
1176 s1->save_progressive_seq = s->progressive_sequence;
1178 /* low_delay may be forced, in this case we will have B-frames
1179 * that behave like P-frames. */
1180 avctx->has_b_frames = !s->low_delay;
1182 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1184 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1185 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1187 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1188 avctx->ticks_per_frame=1;
1191 av_reduce(&s->avctx->time_base.den,
1192 &s->avctx->time_base.num,
1193 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1194 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1196 avctx->ticks_per_frame = 2;
1198 if (s->aspect_ratio_info > 1) {
1200 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1201 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1202 (AVRational) {s->width, s->height});
1204 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1205 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1206 // issue1613, 621, 562
1207 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1208 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1209 s->avctx->sample_aspect_ratio =
1210 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1211 (AVRational) {s->width, s->height});
1213 s->avctx->sample_aspect_ratio =
1214 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1215 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1216 //issue1613 4/3 16/9 -> 16/9
1217 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1218 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1219 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1220 av_dlog(avctx, "A %d/%d\n",
1221 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1222 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1223 s->avctx->sample_aspect_ratio.den);
1226 s->avctx->sample_aspect_ratio =
1227 ff_mpeg2_aspect[s->aspect_ratio_info];
1231 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1232 avctx->hwaccel = ff_find_hwaccel(avctx);
1233 // until then pix_fmt may be changed right after codec init
1235 if ((avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1236 avctx->hwaccel) && avctx->idct_algo == FF_IDCT_AUTO)
1238 if (avctx->hwaccel && avctx->idct_algo == FF_IDCT_AUTO)
1239 #endif /* FF_API_XVMC */
1240 avctx->idct_algo = FF_IDCT_SIMPLE;
1242 /* Quantization matrices may need reordering
1243 * if DCT permutation is changed. */
1244 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1246 if (ff_MPV_common_init(s) < 0)
1249 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1250 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1251 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1252 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1254 s1->mpeg_enc_ctx_allocated = 1;
1259 static int mpeg1_decode_picture(AVCodecContext *avctx,
1260 const uint8_t *buf, int buf_size)
1262 Mpeg1Context *s1 = avctx->priv_data;
1263 MpegEncContext *s = &s1->mpeg_enc_ctx;
1264 int ref, f_code, vbv_delay;
1266 init_get_bits(&s->gb, buf, buf_size*8);
1268 ref = get_bits(&s->gb, 10); /* temporal ref */
1269 s->pict_type = get_bits(&s->gb, 3);
1270 if (s->pict_type == 0 || s->pict_type > 3)
1273 vbv_delay = get_bits(&s->gb, 16);
1274 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1275 s->full_pel[0] = get_bits1(&s->gb);
1276 f_code = get_bits(&s->gb, 3);
1277 if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
1279 s->mpeg_f_code[0][0] = f_code;
1280 s->mpeg_f_code[0][1] = f_code;
1282 if (s->pict_type == AV_PICTURE_TYPE_B) {
1283 s->full_pel[1] = get_bits1(&s->gb);
1284 f_code = get_bits(&s->gb, 3);
1285 if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM))
1287 s->mpeg_f_code[1][0] = f_code;
1288 s->mpeg_f_code[1][1] = f_code;
1290 s->current_picture.f.pict_type = s->pict_type;
1291 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1293 if (avctx->debug & FF_DEBUG_PICT_INFO)
1294 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1301 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1303 MpegEncContext *s= &s1->mpeg_enc_ctx;
1304 int horiz_size_ext, vert_size_ext;
1307 skip_bits(&s->gb, 1); /* profile and level esc*/
1308 s->avctx->profile = get_bits(&s->gb, 3);
1309 s->avctx->level = get_bits(&s->gb, 4);
1310 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1311 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1312 horiz_size_ext = get_bits(&s->gb, 2);
1313 vert_size_ext = get_bits(&s->gb, 2);
1314 s->width |= (horiz_size_ext << 12);
1315 s->height |= (vert_size_ext << 12);
1316 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1317 s->bit_rate += (bit_rate_ext << 18) * 400;
1318 skip_bits1(&s->gb); /* marker */
1319 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1321 s->low_delay = get_bits1(&s->gb);
1322 if (s->flags & CODEC_FLAG_LOW_DELAY)
1325 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1326 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1328 av_dlog(s->avctx, "sequence extension\n");
1329 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1331 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1332 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1333 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1337 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1339 MpegEncContext *s = &s1->mpeg_enc_ctx;
1340 int color_description, w, h;
1342 skip_bits(&s->gb, 3); /* video format */
1343 color_description = get_bits1(&s->gb);
1344 if (color_description) {
1345 s->avctx->color_primaries = get_bits(&s->gb, 8);
1346 s->avctx->color_trc = get_bits(&s->gb, 8);
1347 s->avctx->colorspace = get_bits(&s->gb, 8);
1349 w = get_bits(&s->gb, 14);
1350 skip_bits(&s->gb, 1); //marker
1351 h = get_bits(&s->gb, 14);
1352 // remaining 3 bits are zero padding
1354 s1->pan_scan.width = 16 * w;
1355 s1->pan_scan.height = 16 * h;
1357 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1358 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1361 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1363 MpegEncContext *s = &s1->mpeg_enc_ctx;
1367 if (s->progressive_sequence) {
1368 if (s->repeat_first_field) {
1370 if (s->top_field_first)
1374 if (s->picture_structure == PICT_FRAME) {
1376 if (s->repeat_first_field)
1380 for (i = 0; i < nofco; i++) {
1381 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1382 skip_bits(&s->gb, 1); // marker
1383 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1384 skip_bits(&s->gb, 1); // marker
1387 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1388 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1389 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1390 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1391 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1394 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1398 for (i = 0; i < 64; i++) {
1399 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1400 int v = get_bits(&s->gb, 8);
1402 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1405 if (intra && i == 0 && v != 8) {
1406 av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1407 v = 8; // needed by pink.mpg / issue1046
1416 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1418 av_dlog(s->avctx, "matrix extension\n");
1420 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1421 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1422 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1423 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1426 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1428 MpegEncContext *s = &s1->mpeg_enc_ctx;
1430 s->full_pel[0] = s->full_pel[1] = 0;
1431 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1432 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1433 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1434 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1435 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1436 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1437 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1438 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1439 s->pict_type = AV_PICTURE_TYPE_I;
1441 s->pict_type = AV_PICTURE_TYPE_P;
1443 s->pict_type = AV_PICTURE_TYPE_B;
1444 s->current_picture.f.pict_type = s->pict_type;
1445 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1447 s->intra_dc_precision = get_bits(&s->gb, 2);
1448 s->picture_structure = get_bits(&s->gb, 2);
1449 s->top_field_first = get_bits1(&s->gb);
1450 s->frame_pred_frame_dct = get_bits1(&s->gb);
1451 s->concealment_motion_vectors = get_bits1(&s->gb);
1452 s->q_scale_type = get_bits1(&s->gb);
1453 s->intra_vlc_format = get_bits1(&s->gb);
1454 s->alternate_scan = get_bits1(&s->gb);
1455 s->repeat_first_field = get_bits1(&s->gb);
1456 s->chroma_420_type = get_bits1(&s->gb);
1457 s->progressive_frame = get_bits1(&s->gb);
1459 if (s->progressive_sequence && !s->progressive_frame) {
1460 s->progressive_frame = 1;
1461 av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1464 if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1465 av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1466 s->picture_structure = PICT_FRAME;
1469 if (s->progressive_sequence && !s->frame_pred_frame_dct) {
1470 av_log(s->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
1473 if (s->picture_structure == PICT_FRAME) {
1475 s->v_edge_pos = 16 * s->mb_height;
1477 s->first_field ^= 1;
1478 s->v_edge_pos = 8 * s->mb_height;
1479 memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1482 if (s->alternate_scan) {
1483 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1484 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1486 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1487 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1490 /* composite display not parsed */
1491 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1492 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1493 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1494 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1495 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1496 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1497 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1498 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1499 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1502 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1504 AVCodecContext *avctx = s->avctx;
1505 Mpeg1Context *s1 = (Mpeg1Context*)s;
1507 /* start frame decoding */
1508 if (s->first_field || s->picture_structure == PICT_FRAME) {
1509 AVFrameSideData *pan_scan;
1511 if (ff_MPV_frame_start(s, avctx) < 0)
1514 ff_mpeg_er_frame_start(s);
1516 /* first check if we must repeat the frame */
1517 s->current_picture_ptr->f.repeat_pict = 0;
1518 if (s->repeat_first_field) {
1519 if (s->progressive_sequence) {
1520 if (s->top_field_first)
1521 s->current_picture_ptr->f.repeat_pict = 4;
1523 s->current_picture_ptr->f.repeat_pict = 2;
1524 } else if (s->progressive_frame) {
1525 s->current_picture_ptr->f.repeat_pict = 1;
1529 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1530 AV_FRAME_DATA_PANSCAN,
1531 sizeof(s1->pan_scan));
1533 return AVERROR(ENOMEM);
1534 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1536 if (s1->a53_caption) {
1537 AVFrameSideData *sd = av_frame_new_side_data(
1538 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1539 s1->a53_caption_size);
1541 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1542 av_freep(&s1->a53_caption);
1544 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1545 ff_thread_finish_setup(avctx);
1546 } else { // second field
1549 if (!s->current_picture_ptr) {
1550 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1554 if (s->avctx->hwaccel &&
1555 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1556 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1557 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1560 for (i = 0; i < 4; i++) {
1561 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1562 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1563 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1568 if (avctx->hwaccel) {
1569 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1574 FF_DISABLE_DEPRECATION_WARNINGS
1575 // MPV_frame_start will call this function too,
1576 // but we need to call it on every field
1577 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1578 if (ff_xvmc_field_start(s, avctx) < 0)
1580 FF_ENABLE_DEPRECATION_WARNINGS
1581 #endif /* FF_API_XVMC */
1586 #define DECODE_SLICE_ERROR -1
1587 #define DECODE_SLICE_OK 0
1591 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1592 * @return DECODE_SLICE_ERROR if the slice is damaged,
1593 * DECODE_SLICE_OK if this slice is OK
1595 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1596 const uint8_t **buf, int buf_size)
1598 AVCodecContext *avctx = s->avctx;
1599 const int field_pic = s->picture_structure != PICT_FRAME;
1602 s->resync_mb_y = -1;
1604 assert(mb_y < s->mb_height);
1606 init_get_bits(&s->gb, *buf, buf_size * 8);
1608 ff_mpeg1_clean_buffers(s);
1609 s->interlaced_dct = 0;
1611 s->qscale = get_qscale(s);
1613 if (s->qscale == 0) {
1614 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1618 /* extra slice info */
1619 while (get_bits1(&s->gb) != 0) {
1620 skip_bits(&s->gb, 8);
1625 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1628 while (get_bits_left(&s->gb) > 0) {
1629 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1630 MBINCR_VLC_BITS, 2);
1632 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1639 /* otherwise, stuffing, nothing to do */
1647 if (s->mb_x >= (unsigned)s->mb_width) {
1648 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1652 if (avctx->hwaccel) {
1653 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1654 int start_code = -1;
1655 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1656 if (buf_end < *buf + buf_size)
1659 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1660 return DECODE_SLICE_ERROR;
1662 return DECODE_SLICE_OK;
1665 s->resync_mb_x = s->mb_x;
1666 s->resync_mb_y = s->mb_y = mb_y;
1668 ff_init_block_index(s);
1670 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1671 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1672 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",
1673 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],
1674 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")),
1675 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1676 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1677 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1683 FF_DISABLE_DEPRECATION_WARNINGS
1684 // If 1, we memcpy blocks in xvmcvideo.
1685 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1686 ff_xvmc_init_block(s); // set s->block
1687 FF_ENABLE_DEPRECATION_WARNINGS
1688 #endif /* FF_API_XVMC */
1690 if (mpeg_decode_mb(s, s->block) < 0)
1693 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1694 const int wrap = s->b8_stride;
1695 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1696 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1697 int motion_x, motion_y, dir, i;
1699 for (i = 0; i < 2; i++) {
1700 for (dir = 0; dir < 2; dir++) {
1701 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1702 motion_x = motion_y = 0;
1703 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1704 motion_x = s->mv[dir][0][0];
1705 motion_y = s->mv[dir][0][1];
1706 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1707 motion_x = s->mv[dir][i][0];
1708 motion_y = s->mv[dir][i][1];
1711 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1712 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1713 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1714 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1715 s->current_picture.ref_index [dir][b8_xy ] =
1716 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1717 assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1725 s->dest[1] += 16 >> s->chroma_x_shift;
1726 s->dest[2] += 16 >> s->chroma_x_shift;
1728 ff_MPV_decode_mb(s, s->block);
1730 if (++s->mb_x >= s->mb_width) {
1731 const int mb_size = 16;
1733 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1734 ff_MPV_report_decode_progress(s);
1737 s->mb_y += 1 << field_pic;
1739 if (s->mb_y >= s->mb_height) {
1740 int left = get_bits_left(&s->gb);
1741 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1742 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1743 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1745 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1746 || ((avctx->err_recognition & AV_EF_BUFFER) && left > 8)) {
1747 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1753 ff_init_block_index(s);
1756 /* skip mb handling */
1757 if (s->mb_skip_run == -1) {
1758 /* read increment again */
1761 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1762 MBINCR_VLC_BITS, 2);
1764 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1769 s->mb_skip_run += 33;
1770 } else if (code == 35) {
1771 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1772 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1775 goto eos; /* end of slice */
1777 /* otherwise, stuffing, nothing to do */
1779 s->mb_skip_run += code;
1783 if (s->mb_skip_run) {
1785 if (s->pict_type == AV_PICTURE_TYPE_I) {
1786 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1792 for (i = 0; i < 12; i++)
1793 s->block_last_index[i] = -1;
1794 if (s->picture_structure == PICT_FRAME)
1795 s->mv_type = MV_TYPE_16X16;
1797 s->mv_type = MV_TYPE_FIELD;
1798 if (s->pict_type == AV_PICTURE_TYPE_P) {
1799 /* if P type, zero motion vector is implied */
1800 s->mv_dir = MV_DIR_FORWARD;
1801 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1802 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1803 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1804 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1806 /* if B type, reuse previous vectors and directions */
1807 s->mv[0][0][0] = s->last_mv[0][0][0];
1808 s->mv[0][0][1] = s->last_mv[0][0][1];
1809 s->mv[1][0][0] = s->last_mv[1][0][0];
1810 s->mv[1][0][1] = s->last_mv[1][0][1];
1815 eos: // end of slice
1816 *buf += (get_bits_count(&s->gb)-1)/8;
1817 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1821 static int slice_decode_thread(AVCodecContext *c, void *arg)
1823 MpegEncContext *s = *(void**)arg;
1824 const uint8_t *buf = s->gb.buffer;
1825 int mb_y = s->start_mb_y;
1826 const int field_pic = s->picture_structure != PICT_FRAME;
1828 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1831 uint32_t start_code;
1834 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1836 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1837 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1838 s->start_mb_y, s->end_mb_y, s->er.error_count);
1840 if (c->err_recognition & AV_EF_EXPLODE)
1842 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1843 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);
1845 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);
1848 if (s->mb_y == s->end_mb_y)
1852 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1853 mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
1854 if (s->picture_structure == PICT_BOTTOM_FIELD)
1856 if (mb_y < 0 || mb_y >= s->end_mb_y)
1862 * Handle slice ends.
1863 * @return 1 if it seems to be the last slice
1865 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1867 Mpeg1Context *s1 = avctx->priv_data;
1868 MpegEncContext *s = &s1->mpeg_enc_ctx;
1870 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1873 if (s->avctx->hwaccel) {
1874 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1875 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1879 FF_DISABLE_DEPRECATION_WARNINGS
1880 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1881 ff_xvmc_field_end(s);
1882 FF_ENABLE_DEPRECATION_WARNINGS
1883 #endif /* FF_API_XVMC */
1885 /* end of slice reached */
1886 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field) {
1889 ff_er_frame_end(&s->er);
1891 ff_MPV_frame_end(s);
1893 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1894 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1897 ff_print_debug_info(s, s->current_picture_ptr);
1899 if (avctx->active_thread_type & FF_THREAD_FRAME)
1900 s->picture_number++;
1901 /* latency of 1 frame for I- and P-frames */
1902 /* XXX: use another variable than picture_number */
1903 if (s->last_picture_ptr != NULL) {
1904 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1907 ff_print_debug_info(s, s->last_picture_ptr);
1917 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1918 const uint8_t *buf, int buf_size)
1920 Mpeg1Context *s1 = avctx->priv_data;
1921 MpegEncContext *s = &s1->mpeg_enc_ctx;
1925 init_get_bits(&s->gb, buf, buf_size*8);
1927 width = get_bits(&s->gb, 12);
1928 height = get_bits(&s->gb, 12);
1929 if (width == 0 || height == 0) {
1930 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1932 if (avctx->err_recognition & AV_EF_BITSTREAM)
1933 return AVERROR_INVALIDDATA;
1935 s->aspect_ratio_info = get_bits(&s->gb, 4);
1936 if (s->aspect_ratio_info == 0) {
1937 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1938 if (avctx->err_recognition & AV_EF_BITSTREAM)
1941 s->frame_rate_index = get_bits(&s->gb, 4);
1942 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1944 s->bit_rate = get_bits(&s->gb, 18) * 400;
1945 if (get_bits1(&s->gb) == 0) /* marker */
1950 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1951 skip_bits(&s->gb, 1);
1954 if (get_bits1(&s->gb)) {
1955 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1957 for (i = 0; i < 64; i++) {
1958 j = s->dsp.idct_permutation[i];
1959 v = ff_mpeg1_default_intra_matrix[i];
1960 s->intra_matrix[j] = v;
1961 s->chroma_intra_matrix[j] = v;
1964 if (get_bits1(&s->gb)) {
1965 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1967 for (i = 0; i < 64; i++) {
1968 int j = s->dsp.idct_permutation[i];
1969 v = ff_mpeg1_default_non_intra_matrix[i];
1970 s->inter_matrix[j] = v;
1971 s->chroma_inter_matrix[j] = v;
1975 if (show_bits(&s->gb, 23) != 0) {
1976 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
1980 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
1981 s->progressive_sequence = 1;
1982 s->progressive_frame = 1;
1983 s->picture_structure = PICT_FRAME;
1984 s->frame_pred_frame_dct = 1;
1985 s->chroma_format = 1;
1986 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
1987 s->out_format = FMT_MPEG1;
1988 if (s->flags & CODEC_FLAG_LOW_DELAY)
1991 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1992 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
1993 s->avctx->rc_buffer_size, s->bit_rate);
1998 static int vcr2_init_sequence(AVCodecContext *avctx)
2000 Mpeg1Context *s1 = avctx->priv_data;
2001 MpegEncContext *s = &s1->mpeg_enc_ctx;
2004 /* start new MPEG-1 context decoding */
2005 s->out_format = FMT_MPEG1;
2006 if (s1->mpeg_enc_ctx_allocated) {
2007 ff_MPV_common_end(s);
2009 s->width = avctx->coded_width;
2010 s->height = avctx->coded_height;
2011 avctx->has_b_frames = 0; // true?
2014 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2015 avctx->hwaccel = ff_find_hwaccel(avctx);
2018 if ((avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel) &&
2019 avctx->idct_algo == FF_IDCT_AUTO)
2021 if (avctx->hwaccel && avctx->idct_algo == FF_IDCT_AUTO)
2022 #endif /* FF_API_XVMC */
2023 avctx->idct_algo = FF_IDCT_SIMPLE;
2025 if (ff_MPV_common_init(s) < 0)
2027 s1->mpeg_enc_ctx_allocated = 1;
2029 for (i = 0; i < 64; i++) {
2030 int j = s->dsp.idct_permutation[i];
2031 v = ff_mpeg1_default_intra_matrix[i];
2032 s->intra_matrix[j] = v;
2033 s->chroma_intra_matrix[j] = v;
2035 v = ff_mpeg1_default_non_intra_matrix[i];
2036 s->inter_matrix[j] = v;
2037 s->chroma_inter_matrix[j] = v;
2040 s->progressive_sequence = 1;
2041 s->progressive_frame = 1;
2042 s->picture_structure = PICT_FRAME;
2043 s->frame_pred_frame_dct = 1;
2044 s->chroma_format = 1;
2045 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2046 s1->save_width = s->width;
2047 s1->save_height = s->height;
2048 s1->save_progressive_seq = s->progressive_sequence;
2053 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2054 const uint8_t *p, int buf_size)
2056 Mpeg1Context *s1 = avctx->priv_data;
2058 if (buf_size >= 6 &&
2059 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2060 p[4] == 3 && (p[5] & 0x40)) {
2061 /* extract A53 Part 4 CC data */
2062 int cc_count = p[5] & 0x1f;
2063 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2064 av_freep(&s1->a53_caption);
2065 s1->a53_caption_size = cc_count * 3;
2066 s1->a53_caption = av_malloc(s1->a53_caption_size);
2067 if (s1->a53_caption) {
2068 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2072 } else if (buf_size >= 11 &&
2073 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2074 /* extract DVD CC data */
2077 // There is a caption count field in the data, but it is often
2078 // incorect. So count the number of captions present.
2079 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2081 // Transform the DVD format into A53 Part 4 format
2083 av_freep(&s1->a53_caption);
2084 s1->a53_caption_size = cc_count * 6;
2085 s1->a53_caption = av_malloc(s1->a53_caption_size);
2086 if (s1->a53_caption) {
2087 uint8_t field1 = !!(p[4] & 0x80);
2088 uint8_t *cap = s1->a53_caption;
2090 for (i = 0; i < cc_count; i++) {
2091 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2094 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2107 static void mpeg_decode_user_data(AVCodecContext *avctx,
2108 const uint8_t *p, int buf_size)
2110 const uint8_t *buf_end = p + buf_size;
2112 /* we parse the DTG active format information */
2113 if (buf_end - p >= 5 &&
2114 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2122 if (buf_end - p < 1)
2124 avctx->dtg_active_format = p[0] & 0x0f;
2126 } else if (buf_end - p >= 6 &&
2127 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2128 p[4] == 0x03) { // S3D_video_format_length
2129 // the 0x7F mask ignores the reserved_bit value
2130 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2132 if (S3D_video_format_type == 0x03 ||
2133 S3D_video_format_type == 0x04 ||
2134 S3D_video_format_type == 0x08 ||
2135 S3D_video_format_type == 0x23) {
2136 Mpeg1Context *s1 = avctx->priv_data;
2137 MpegEncContext *s = &s1->mpeg_enc_ctx;
2138 AVStereo3D *stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2142 switch (S3D_video_format_type) {
2144 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2147 stereo->type = AV_STEREO3D_TOPBOTTOM;
2150 stereo->type = AV_STEREO3D_2D;
2153 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2157 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2162 static void mpeg_decode_gop(AVCodecContext *avctx,
2163 const uint8_t *buf, int buf_size)
2165 Mpeg1Context *s1 = avctx->priv_data;
2166 MpegEncContext *s = &s1->mpeg_enc_ctx;
2168 int time_code_hours, time_code_minutes;
2169 int time_code_seconds, time_code_pictures;
2172 init_get_bits(&s->gb, buf, buf_size*8);
2174 skip_bits1(&s->gb); /* drop_frame_flag */
2176 time_code_hours = get_bits(&s->gb, 5);
2177 time_code_minutes = get_bits(&s->gb, 6);
2178 skip_bits1(&s->gb); // marker bit
2179 time_code_seconds = get_bits(&s->gb, 6);
2180 time_code_pictures = get_bits(&s->gb, 6);
2182 s1->closed_gop = get_bits1(&s->gb);
2183 /*broken_link indicate that after editing the
2184 reference frames of the first B-Frames after GOP I-Frame
2185 are missing (open gop)*/
2186 broken_link = get_bits1(&s->gb);
2188 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2189 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2190 time_code_hours, time_code_minutes, time_code_seconds,
2191 time_code_pictures, s1->closed_gop, broken_link);
2194 static int decode_chunks(AVCodecContext *avctx,
2195 AVFrame *picture, int *got_output,
2196 const uint8_t *buf, int buf_size)
2198 Mpeg1Context *s = avctx->priv_data;
2199 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2200 const uint8_t *buf_ptr = buf;
2201 const uint8_t *buf_end = buf + buf_size;
2202 int ret, input_size;
2203 int last_code = 0, skip_frame = 0;
2206 /* find next start code */
2207 uint32_t start_code = -1;
2208 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2209 if (start_code > 0x1ff) {
2211 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2215 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2216 for (i = 0; i < s->slice_count; i++)
2217 s2->er.error_count += s2->thread_context[i]->er.error_count;
2220 ret = slice_end(avctx, picture);
2224 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2229 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2232 input_size = buf_end - buf_ptr;
2234 if (avctx->debug & FF_DEBUG_STARTCODE) {
2235 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2238 /* prepare data for next start code */
2239 switch (start_code) {
2240 case SEQ_START_CODE:
2241 if (last_code == 0) {
2242 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2245 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2246 if (avctx->err_recognition & AV_EF_EXPLODE)
2247 return AVERROR_INVALIDDATA;
2251 case PICTURE_START_CODE:
2252 if (s2->width <= 0 || s2->height <= 0) {
2253 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2254 s2->width, s2->height);
2255 return AVERROR_INVALIDDATA;
2258 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2259 !avctx->hwaccel && s->slice_count) {
2262 avctx->execute(avctx, slice_decode_thread,
2263 s2->thread_context, NULL,
2264 s->slice_count, sizeof(void*));
2265 for (i = 0; i < s->slice_count; i++)
2266 s2->er.error_count += s2->thread_context[i]->er.error_count;
2269 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2270 ret = mpeg_decode_postinit(avctx);
2272 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2276 /* we have a complete image: we try to decompress it */
2277 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2280 last_code = PICTURE_START_CODE;
2282 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2283 if (avctx->err_recognition & AV_EF_EXPLODE)
2284 return AVERROR_INVALIDDATA;
2287 case EXT_START_CODE:
2288 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2290 switch (get_bits(&s2->gb, 4)) {
2292 if (last_code == 0) {
2293 mpeg_decode_sequence_extension(s);
2295 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2296 if (avctx->err_recognition & AV_EF_EXPLODE)
2297 return AVERROR_INVALIDDATA;
2301 mpeg_decode_sequence_display_extension(s);
2304 mpeg_decode_quant_matrix_extension(s2);
2307 mpeg_decode_picture_display_extension(s);
2310 if (last_code == PICTURE_START_CODE) {
2311 mpeg_decode_picture_coding_extension(s);
2313 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2314 if (avctx->err_recognition & AV_EF_EXPLODE)
2315 return AVERROR_INVALIDDATA;
2320 case USER_START_CODE:
2321 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2323 case GOP_START_CODE:
2324 if (last_code == 0) {
2326 mpeg_decode_gop(avctx, buf_ptr, input_size);
2329 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2330 if (avctx->err_recognition & AV_EF_EXPLODE)
2331 return AVERROR_INVALIDDATA;
2335 if (start_code >= SLICE_MIN_START_CODE &&
2336 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2337 const int field_pic = s2->picture_structure != PICT_FRAME;
2338 int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
2339 last_code = SLICE_MIN_START_CODE;
2341 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2344 if (mb_y >= s2->mb_height) {
2345 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2349 if (s2->last_picture_ptr == NULL) {
2350 /* Skip B-frames if we do not have reference frames and gop is not closed */
2351 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2352 if (!s->closed_gop) {
2358 if (s2->pict_type == AV_PICTURE_TYPE_I)
2360 if (s2->next_picture_ptr == NULL) {
2361 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2362 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2367 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2368 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2369 avctx->skip_frame >= AVDISCARD_ALL) {
2374 if (!s->mpeg_enc_ctx_allocated)
2377 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2378 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2382 if (!s2->pict_type) {
2383 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2384 if (avctx->err_recognition & AV_EF_EXPLODE)
2385 return AVERROR_INVALIDDATA;
2389 if (s->first_slice) {
2392 if (mpeg_field_start(s2, buf, buf_size) < 0)
2395 if (!s2->current_picture_ptr) {
2396 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2397 return AVERROR_INVALIDDATA;
2400 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2402 int threshold = (s2->mb_height * s->slice_count +
2403 s2->slice_context_count / 2) /
2404 s2->slice_context_count;
2405 if (threshold <= mb_y) {
2406 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2408 thread_context->start_mb_y = mb_y;
2409 thread_context->end_mb_y = s2->mb_height;
2410 if (s->slice_count) {
2411 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2412 ret = ff_update_duplicate_context(thread_context,
2417 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2420 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2422 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2426 if (avctx->err_recognition & AV_EF_EXPLODE)
2428 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2429 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);
2431 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);
2440 static int mpeg_decode_frame(AVCodecContext *avctx,
2441 void *data, int *got_output,
2444 const uint8_t *buf = avpkt->data;
2445 int buf_size = avpkt->size;
2446 Mpeg1Context *s = avctx->priv_data;
2447 AVFrame *picture = data;
2448 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2449 av_dlog(avctx, "fill_buffer\n");
2451 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2452 /* special case for last picture */
2453 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2454 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2458 s2->next_picture_ptr = NULL;
2465 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2466 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2468 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2472 if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
2473 vcr2_init_sequence(avctx);
2477 if (avctx->extradata && !s->extradata_decoded) {
2478 int ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2479 s->extradata_decoded = 1;
2480 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2484 return decode_chunks(avctx, picture, got_output, buf, buf_size);
2488 static void flush(AVCodecContext *avctx)
2490 Mpeg1Context *s = avctx->priv_data;
2495 ff_mpeg_flush(avctx);
2498 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2500 Mpeg1Context *s = avctx->priv_data;
2502 if (s->mpeg_enc_ctx_allocated)
2503 ff_MPV_common_end(&s->mpeg_enc_ctx);
2504 av_freep(&s->a53_caption);
2508 static const AVProfile mpeg2_video_profiles[] = {
2509 { FF_PROFILE_MPEG2_422, "4:2:2" },
2510 { FF_PROFILE_MPEG2_HIGH, "High" },
2511 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2512 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2513 { FF_PROFILE_MPEG2_MAIN, "Main" },
2514 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2515 { FF_PROFILE_RESERVED, "Reserved" },
2516 { FF_PROFILE_RESERVED, "Reserved" },
2517 { FF_PROFILE_UNKNOWN },
2521 AVCodec ff_mpeg1video_decoder = {
2522 .name = "mpeg1video",
2523 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2524 .type = AVMEDIA_TYPE_VIDEO,
2525 .id = AV_CODEC_ID_MPEG1VIDEO,
2526 .priv_data_size = sizeof(Mpeg1Context),
2527 .init = mpeg_decode_init,
2528 .close = mpeg_decode_end,
2529 .decode = mpeg_decode_frame,
2530 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2531 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2532 CODEC_CAP_SLICE_THREADS,
2534 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2537 AVCodec ff_mpeg2video_decoder = {
2538 .name = "mpeg2video",
2539 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2540 .type = AVMEDIA_TYPE_VIDEO,
2541 .id = AV_CODEC_ID_MPEG2VIDEO,
2542 .priv_data_size = sizeof(Mpeg1Context),
2543 .init = mpeg_decode_init,
2544 .close = mpeg_decode_end,
2545 .decode = mpeg_decode_frame,
2546 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2547 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2548 CODEC_CAP_SLICE_THREADS,
2550 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2554 #if CONFIG_MPEG_XVMC_DECODER
2555 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2557 if (avctx->active_thread_type & FF_THREAD_SLICE)
2559 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2561 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2562 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2564 mpeg_decode_init(avctx);
2566 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2567 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2572 AVCodec ff_mpeg_xvmc_decoder = {
2573 .name = "mpegvideo_xvmc",
2574 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2575 .type = AVMEDIA_TYPE_VIDEO,
2576 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2577 .priv_data_size = sizeof(Mpeg1Context),
2578 .init = mpeg_mc_decode_init,
2579 .close = mpeg_decode_end,
2580 .decode = mpeg_decode_frame,
2581 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2582 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2587 #endif /* FF_API_XVMC */