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"
33 #include "mpegvideo.h"
34 #include "error_resilience.h"
36 #include "mpeg12data.h"
37 #include "bytestream.h"
38 #include "vdpau_internal.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?
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;
274 * Note: this function can read out of range and crash for corrupt streams.
275 * Changing this would eat up any speed benefits it has.
276 * Do not use "fast" flag if you need the code to be robust.
278 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
280 int level, i, j, run;
281 RLTable *rl = &ff_rl_mpeg1;
282 uint8_t * const scantable = s->intra_scantable.permutated;
283 const int qscale = s->qscale;
286 OPEN_READER(re, &s->gb);
288 // special case for first coefficient, no need to add second VLC table
289 UPDATE_CACHE(re, &s->gb);
290 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
291 level = (3 * qscale) >> 1;
292 level = (level - 1) | 1;
293 if (GET_CACHE(re, &s->gb) & 0x40000000)
297 SKIP_BITS(re, &s->gb, 2);
298 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
302 /* now quantify & encode AC coefficients */
304 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
309 level = ((level * 2 + 1) * qscale) >> 1;
310 level = (level - 1) | 1;
311 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
312 SKIP_BITS(re, &s->gb, 1);
315 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
316 UPDATE_CACHE(re, &s->gb);
317 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
319 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
320 } else if (level == 0) {
321 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
327 level = ((level * 2 + 1) * qscale) >> 1;
328 level = (level - 1) | 1;
331 level = ((level * 2 + 1) * qscale) >> 1;
332 level = (level - 1) | 1;
337 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
339 UPDATE_CACHE(re, &s->gb);
342 LAST_SKIP_BITS(re, &s->gb, 2);
343 CLOSE_READER(re, &s->gb);
345 s->block_last_index[n] = i;
350 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
352 int level, i, j, run;
353 RLTable *rl = &ff_rl_mpeg1;
354 uint8_t * const scantable = s->intra_scantable.permutated;
355 const uint16_t *quant_matrix;
356 const int qscale = s->qscale;
362 OPEN_READER(re, &s->gb);
365 quant_matrix = s->inter_matrix;
367 quant_matrix = s->chroma_inter_matrix;
369 // special case for first coefficient, no need to add second VLC table
370 UPDATE_CACHE(re, &s->gb);
371 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
372 level= (3 * qscale * quant_matrix[0]) >> 5;
373 if (GET_CACHE(re, &s->gb) & 0x40000000)
378 SKIP_BITS(re, &s->gb, 2);
379 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
383 /* now quantify & encode AC coefficients */
385 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
390 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
391 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
392 SKIP_BITS(re, &s->gb, 1);
395 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
396 UPDATE_CACHE(re, &s->gb);
397 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
402 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
405 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
409 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
415 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
417 UPDATE_CACHE(re, &s->gb);
420 LAST_SKIP_BITS(re, &s->gb, 2);
421 CLOSE_READER(re, &s->gb);
423 block[63] ^= (mismatch & 1);
425 s->block_last_index[n] = i;
430 * Note: this function can read out of range and crash for corrupt streams.
431 * Changing this would eat up any speed benefits it has.
432 * Do not use "fast" flag if you need the code to be robust.
434 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
435 int16_t *block, int n)
437 int level, i, j, run;
438 RLTable *rl = &ff_rl_mpeg1;
439 uint8_t * const scantable = s->intra_scantable.permutated;
440 const int qscale = s->qscale;
441 OPEN_READER(re, &s->gb);
444 // special case for first coefficient, no need to add second VLC table
445 UPDATE_CACHE(re, &s->gb);
446 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
447 level = (3 * qscale) >> 1;
448 if (GET_CACHE(re, &s->gb) & 0x40000000)
452 SKIP_BITS(re, &s->gb, 2);
453 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
457 /* now quantify & encode AC coefficients */
459 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
464 level = ((level * 2 + 1) * qscale) >> 1;
465 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
466 SKIP_BITS(re, &s->gb, 1);
469 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
470 UPDATE_CACHE(re, &s->gb);
471 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
476 level = ((-level * 2 + 1) * qscale) >> 1;
479 level = ((level * 2 + 1) * qscale) >> 1;
484 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
486 UPDATE_CACHE(re, &s->gb);
489 LAST_SKIP_BITS(re, &s->gb, 2);
490 CLOSE_READER(re, &s->gb);
491 s->block_last_index[n] = i;
496 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
498 int level, dc, diff, i, j, run;
501 uint8_t * const scantable = s->intra_scantable.permutated;
502 const uint16_t *quant_matrix;
503 const int qscale = s->qscale;
508 quant_matrix = s->intra_matrix;
511 quant_matrix = s->chroma_intra_matrix;
512 component = (n & 1) + 1;
514 diff = decode_dc(&s->gb, component);
517 dc = s->last_dc[component];
519 s->last_dc[component] = dc;
520 block[0] = dc << (3 - s->intra_dc_precision);
521 av_dlog(s->avctx, "dc=%d\n", block[0]);
522 mismatch = block[0] ^ 1;
524 if (s->intra_vlc_format)
530 OPEN_READER(re, &s->gb);
531 /* now quantify & encode AC coefficients */
533 UPDATE_CACHE(re, &s->gb);
534 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
538 } else if (level != 0) {
541 level = (level * qscale * quant_matrix[j]) >> 4;
542 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
543 LAST_SKIP_BITS(re, &s->gb, 1);
546 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
547 UPDATE_CACHE(re, &s->gb);
548 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
552 level = (-level * qscale * quant_matrix[j]) >> 4;
555 level = (level * qscale * quant_matrix[j]) >> 4;
559 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
566 CLOSE_READER(re, &s->gb);
568 block[63] ^= mismatch & 1;
570 s->block_last_index[n] = i;
575 * Note: this function can read out of range and crash for corrupt streams.
576 * Changing this would eat up any speed benefits it has.
577 * Do not use "fast" flag if you need the code to be robust.
579 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
581 int level, dc, diff, j, run;
584 uint8_t * scantable = s->intra_scantable.permutated;
585 const uint16_t *quant_matrix;
586 const int qscale = s->qscale;
590 quant_matrix = s->intra_matrix;
593 quant_matrix = s->chroma_intra_matrix;
594 component = (n & 1) + 1;
596 diff = decode_dc(&s->gb, component);
599 dc = s->last_dc[component];
601 s->last_dc[component] = dc;
602 block[0] = dc << (3 - s->intra_dc_precision);
603 if (s->intra_vlc_format)
609 OPEN_READER(re, &s->gb);
610 /* now quantify & encode AC coefficients */
612 UPDATE_CACHE(re, &s->gb);
613 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
617 } else if (level != 0) {
620 level = (level * qscale * quant_matrix[j]) >> 4;
621 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
622 LAST_SKIP_BITS(re, &s->gb, 1);
625 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
626 UPDATE_CACHE(re, &s->gb);
627 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
631 level = (-level * qscale * quant_matrix[j]) >> 4;
634 level = (level * qscale * quant_matrix[j]) >> 4;
640 CLOSE_READER(re, &s->gb);
643 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
647 /******************************************/
650 static inline int get_dmv(MpegEncContext *s)
652 if (get_bits1(&s->gb))
653 return 1 - (get_bits1(&s->gb) << 1);
658 static inline int get_qscale(MpegEncContext *s)
660 int qscale = get_bits(&s->gb, 5);
661 if (s->q_scale_type) {
662 return non_linear_qscale[qscale];
668 static void exchange_uv(MpegEncContext *s)
673 s->pblocks[4] = s->pblocks[5];
677 /* motion type (for MPEG-2) */
683 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
685 int i, j, k, cbp, val, mb_type, motion_type;
686 const int mb_block_count = 4 + (1 << s->chroma_format);
688 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
690 av_assert2(s->mb_skipped == 0);
692 if (s->mb_skip_run-- != 0) {
693 if (s->pict_type == AV_PICTURE_TYPE_P) {
695 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
700 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
702 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
703 if (IS_INTRA(mb_type)) {
704 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
707 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
708 mb_type | MB_TYPE_SKIP;
710 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
717 switch (s->pict_type) {
719 case AV_PICTURE_TYPE_I:
720 if (get_bits1(&s->gb) == 0) {
721 if (get_bits1(&s->gb) == 0) {
722 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
725 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
727 mb_type = MB_TYPE_INTRA;
730 case AV_PICTURE_TYPE_P:
731 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
733 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
736 mb_type = ptype2mb_type[mb_type];
738 case AV_PICTURE_TYPE_B:
739 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
741 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
744 mb_type = btype2mb_type[mb_type];
747 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
748 // motion_type = 0; /* avoid warning */
749 if (IS_INTRA(mb_type)) {
750 s->dsp.clear_blocks(s->block[0]);
752 if (!s->chroma_y_shift) {
753 s->dsp.clear_blocks(s->block[6]);
756 /* compute DCT type */
757 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
758 !s->frame_pred_frame_dct) {
759 s->interlaced_dct = get_bits1(&s->gb);
762 if (IS_QUANT(mb_type))
763 s->qscale = get_qscale(s);
765 if (s->concealment_motion_vectors) {
766 /* just parse them */
767 if (s->picture_structure != PICT_FRAME)
768 skip_bits1(&s->gb); /* field select */
770 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
771 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
772 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
773 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
775 skip_bits1(&s->gb); /* marker */
777 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
780 FF_DISABLE_DEPRECATION_WARNINGS
781 // if 1, we memcpy blocks in xvmcvideo
782 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
783 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
788 FF_ENABLE_DEPRECATION_WARNINGS
789 #endif /* FF_API_XVMC */
791 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
792 if (s->flags2 & CODEC_FLAG2_FAST) {
793 for (i = 0; i < 6; i++) {
794 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
797 for (i = 0; i < mb_block_count; i++) {
798 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
803 for (i = 0; i < 6; i++) {
804 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
809 if (mb_type & MB_TYPE_ZERO_MV) {
810 av_assert2(mb_type & MB_TYPE_CBP);
812 s->mv_dir = MV_DIR_FORWARD;
813 if (s->picture_structure == PICT_FRAME) {
814 if (s->picture_structure == PICT_FRAME
815 && !s->frame_pred_frame_dct)
816 s->interlaced_dct = get_bits1(&s->gb);
817 s->mv_type = MV_TYPE_16X16;
819 s->mv_type = MV_TYPE_FIELD;
820 mb_type |= MB_TYPE_INTERLACED;
821 s->field_select[0][0] = s->picture_structure - 1;
824 if (IS_QUANT(mb_type))
825 s->qscale = get_qscale(s);
827 s->last_mv[0][0][0] = 0;
828 s->last_mv[0][0][1] = 0;
829 s->last_mv[0][1][0] = 0;
830 s->last_mv[0][1][1] = 0;
834 av_assert2(mb_type & MB_TYPE_L0L1);
835 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
836 /* get additional motion vector type */
837 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
838 motion_type = MT_FRAME;
840 motion_type = get_bits(&s->gb, 2);
841 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
842 s->interlaced_dct = get_bits1(&s->gb);
845 if (IS_QUANT(mb_type))
846 s->qscale = get_qscale(s);
849 s->mv_dir = (mb_type >> 13) & 3;
850 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
851 switch (motion_type) {
852 case MT_FRAME: /* or MT_16X8 */
853 if (s->picture_structure == PICT_FRAME) {
854 mb_type |= MB_TYPE_16x16;
855 s->mv_type = MV_TYPE_16X16;
856 for (i = 0; i < 2; i++) {
857 if (USES_LIST(mb_type, i)) {
859 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
860 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
861 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
862 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
863 /* full_pel: only for MPEG-1 */
864 if (s->full_pel[i]) {
865 s->mv[i][0][0] <<= 1;
866 s->mv[i][0][1] <<= 1;
871 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
872 s->mv_type = MV_TYPE_16X8;
873 for (i = 0; i < 2; i++) {
874 if (USES_LIST(mb_type, i)) {
876 for (j = 0; j < 2; j++) {
877 s->field_select[i][j] = get_bits1(&s->gb);
878 for (k = 0; k < 2; k++) {
879 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
880 s->last_mv[i][j][k]);
881 s->last_mv[i][j][k] = val;
882 s->mv[i][j][k] = val;
890 s->mv_type = MV_TYPE_FIELD;
891 if (s->picture_structure == PICT_FRAME) {
892 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
893 for (i = 0; i < 2; i++) {
894 if (USES_LIST(mb_type, i)) {
895 for (j = 0; j < 2; j++) {
896 s->field_select[i][j] = get_bits1(&s->gb);
897 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
898 s->last_mv[i][j][0]);
899 s->last_mv[i][j][0] = val;
900 s->mv[i][j][0] = val;
901 av_dlog(s->avctx, "fmx=%d\n", val);
902 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
903 s->last_mv[i][j][1] >> 1);
904 s->last_mv[i][j][1] = val << 1;
905 s->mv[i][j][1] = val;
906 av_dlog(s->avctx, "fmy=%d\n", val);
911 av_assert0(!s->progressive_sequence);
912 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
913 for (i = 0; i < 2; i++) {
914 if (USES_LIST(mb_type, i)) {
915 s->field_select[i][0] = get_bits1(&s->gb);
916 for (k = 0; k < 2; k++) {
917 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
918 s->last_mv[i][0][k]);
919 s->last_mv[i][0][k] = val;
920 s->last_mv[i][1][k] = val;
921 s->mv[i][0][k] = val;
928 if(s->progressive_sequence){
929 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
932 s->mv_type = MV_TYPE_DMV;
933 for (i = 0; i < 2; i++) {
934 if (USES_LIST(mb_type, i)) {
935 int dmx, dmy, mx, my, m;
936 const int my_shift = s->picture_structure == PICT_FRAME;
938 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
939 s->last_mv[i][0][0]);
940 s->last_mv[i][0][0] = mx;
941 s->last_mv[i][1][0] = mx;
943 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
944 s->last_mv[i][0][1] >> my_shift);
948 s->last_mv[i][0][1] = my << my_shift;
949 s->last_mv[i][1][1] = my << my_shift;
953 s->mv[i][1][0] = mx; // not used
954 s->mv[i][1][1] = my; // not used
956 if (s->picture_structure == PICT_FRAME) {
957 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
959 // m = 1 + 2 * s->top_field_first;
960 m = s->top_field_first ? 1 : 3;
962 /* top -> top pred */
963 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
964 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
966 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
967 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
969 mb_type |= MB_TYPE_16x16;
971 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
972 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
973 if (s->picture_structure == PICT_TOP_FIELD)
982 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
988 if (HAS_CBP(mb_type)) {
989 s->dsp.clear_blocks(s->block[0]);
991 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
992 if (mb_block_count > 6) {
993 cbp <<= mb_block_count - 6;
994 cbp |= get_bits(&s->gb, mb_block_count - 6);
995 s->dsp.clear_blocks(s->block[6]);
998 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1003 FF_DISABLE_DEPRECATION_WARNINGS
1004 //if 1, we memcpy blocks in xvmcvideo
1005 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1006 ff_xvmc_pack_pblocks(s, cbp);
1011 FF_ENABLE_DEPRECATION_WARNINGS
1012 #endif /* FF_API_XVMC */
1014 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1015 if (s->flags2 & CODEC_FLAG2_FAST) {
1016 for (i = 0; i < 6; i++) {
1018 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1020 s->block_last_index[i] = -1;
1025 cbp <<= 12-mb_block_count;
1027 for (i = 0; i < mb_block_count; i++) {
1028 if (cbp & (1 << 11)) {
1029 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1032 s->block_last_index[i] = -1;
1038 if (s->flags2 & CODEC_FLAG2_FAST) {
1039 for (i = 0; i < 6; i++) {
1041 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1043 s->block_last_index[i] = -1;
1048 for (i = 0; i < 6; i++) {
1050 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1053 s->block_last_index[i] = -1;
1060 for (i = 0; i < 12; i++)
1061 s->block_last_index[i] = -1;
1065 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1070 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1072 Mpeg1Context *s = avctx->priv_data;
1073 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1076 /* we need some permutation to store matrices,
1077 * until MPV_common_init() sets the real permutation. */
1078 for (i = 0; i < 64; i++)
1079 s2->dsp.idct_permutation[i]=i;
1081 ff_MPV_decode_defaults(s2);
1083 s->mpeg_enc_ctx.avctx = avctx;
1084 s->mpeg_enc_ctx.flags = avctx->flags;
1085 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1086 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1087 ff_mpeg12_init_vlcs();
1089 s->mpeg_enc_ctx_allocated = 0;
1090 s->mpeg_enc_ctx.picture_number = 0;
1091 s->repeat_field = 0;
1092 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1093 avctx->color_range = AVCOL_RANGE_MPEG;
1094 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1095 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1097 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1101 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1103 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1104 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1107 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1110 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1111 if (err) return err;
1113 if (!ctx->mpeg_enc_ctx_allocated)
1114 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1116 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1117 s->picture_number++;
1122 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1123 const uint8_t *new_perm)
1125 uint16_t temp_matrix[64];
1128 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1130 for (i = 0; i < 64; i++) {
1131 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1135 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1137 #if CONFIG_MPEG_XVMC_DECODER
1138 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1139 AV_PIX_FMT_XVMC_MPEG2_MC,
1141 #endif /* FF_API_XVMC */
1142 #if CONFIG_MPEG1_VDPAU_HWACCEL
1143 AV_PIX_FMT_VDPAU_MPEG1,
1150 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1152 #if CONFIG_MPEG_XVMC_DECODER
1153 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1154 AV_PIX_FMT_XVMC_MPEG2_MC,
1156 #endif /* FF_API_XVMC */
1157 #if CONFIG_MPEG2_VDPAU_HWACCEL
1158 AV_PIX_FMT_VDPAU_MPEG2,
1161 #if CONFIG_MPEG2_DXVA2_HWACCEL
1162 AV_PIX_FMT_DXVA2_VLD,
1164 #if CONFIG_MPEG2_VAAPI_HWACCEL
1165 AV_PIX_FMT_VAAPI_VLD,
1171 static inline int uses_vdpau(AVCodecContext *avctx) {
1172 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1175 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1177 Mpeg1Context *s1 = avctx->priv_data;
1178 MpegEncContext *s = &s1->mpeg_enc_ctx;
1180 if(s->chroma_format < 2) {
1181 return ff_thread_get_format(avctx,
1182 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1183 mpeg1_hwaccel_pixfmt_list_420 :
1184 mpeg2_hwaccel_pixfmt_list_420);
1185 } else if(s->chroma_format == 2)
1186 return AV_PIX_FMT_YUV422P;
1188 return AV_PIX_FMT_YUV444P;
1191 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1194 FF_DISABLE_DEPRECATION_WARNINGS
1195 if (avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_IDCT && avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_MC) {
1196 avctx->xvmc_acceleration = 0;
1197 } else if (!avctx->xvmc_acceleration) {
1198 avctx->xvmc_acceleration = 2;
1200 FF_ENABLE_DEPRECATION_WARNINGS
1201 #endif /* FF_API_XVMC */
1202 avctx->hwaccel = ff_find_hwaccel(avctx);
1203 // until then pix_fmt may be changed right after codec init
1205 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1209 avctx->hwaccel || uses_vdpau(avctx))
1210 if (avctx->idct_algo == FF_IDCT_AUTO)
1211 avctx->idct_algo = FF_IDCT_SIMPLE;
1214 /* Call this function when we know all parameters.
1215 * It may be called in different places for MPEG-1 and MPEG-2. */
1216 static int mpeg_decode_postinit(AVCodecContext *avctx)
1218 Mpeg1Context *s1 = avctx->priv_data;
1219 MpegEncContext *s = &s1->mpeg_enc_ctx;
1220 uint8_t old_permutation[64];
1223 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1224 avctx->coded_width != s->width ||
1225 avctx->coded_height != s->height ||
1226 s1->save_width != s->width ||
1227 s1->save_height != s->height ||
1228 s1->save_aspect_info != s->aspect_ratio_info ||
1229 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1233 if (s1->mpeg_enc_ctx_allocated) {
1234 ParseContext pc = s->parse_context;
1235 s->parse_context.buffer = 0;
1236 ff_MPV_common_end(s);
1237 s->parse_context = pc;
1238 s1->mpeg_enc_ctx_allocated = 0;
1241 if ((s->width == 0) || (s->height == 0))
1244 ret = ff_set_dimensions(avctx, s->width, s->height);
1248 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1249 avctx->rc_max_rate = s->bit_rate;
1250 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1251 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1252 avctx->bit_rate = s->bit_rate;
1254 s1->save_aspect_info = s->aspect_ratio_info;
1255 s1->save_width = s->width;
1256 s1->save_height = s->height;
1257 s1->save_progressive_seq = s->progressive_sequence;
1259 /* low_delay may be forced, in this case we will have B-frames
1260 * that behave like P-frames. */
1261 avctx->has_b_frames = !s->low_delay;
1263 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1265 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1266 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1268 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1269 avctx->ticks_per_frame=1;
1272 av_reduce(&s->avctx->time_base.den,
1273 &s->avctx->time_base.num,
1274 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1275 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1277 avctx->ticks_per_frame = 2;
1279 if (s->aspect_ratio_info > 1) {
1281 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1282 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1283 (AVRational) {s->width, s->height});
1285 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1286 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1287 // issue1613, 621, 562
1288 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1289 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1290 s->avctx->sample_aspect_ratio =
1291 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1292 (AVRational) {s->width, s->height});
1294 s->avctx->sample_aspect_ratio =
1295 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1296 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1297 //issue1613 4/3 16/9 -> 16/9
1298 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1299 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1300 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1301 av_dlog(avctx, "A %d/%d\n",
1302 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1303 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1304 s->avctx->sample_aspect_ratio.den);
1307 s->avctx->sample_aspect_ratio =
1308 ff_mpeg2_aspect[s->aspect_ratio_info];
1312 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1313 setup_hwaccel_for_pixfmt(avctx);
1315 /* Quantization matrices may need reordering
1316 * if DCT permutation is changed. */
1317 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1319 if (ff_MPV_common_init(s) < 0)
1322 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1323 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1324 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1325 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1327 s1->mpeg_enc_ctx_allocated = 1;
1332 static int mpeg1_decode_picture(AVCodecContext *avctx,
1333 const uint8_t *buf, int buf_size)
1335 Mpeg1Context *s1 = avctx->priv_data;
1336 MpegEncContext *s = &s1->mpeg_enc_ctx;
1337 int ref, f_code, vbv_delay;
1339 init_get_bits(&s->gb, buf, buf_size*8);
1341 ref = get_bits(&s->gb, 10); /* temporal ref */
1342 s->pict_type = get_bits(&s->gb, 3);
1343 if (s->pict_type == 0 || s->pict_type > 3)
1346 vbv_delay = get_bits(&s->gb, 16);
1347 s->vbv_delay = vbv_delay;
1348 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1349 s->full_pel[0] = get_bits1(&s->gb);
1350 f_code = get_bits(&s->gb, 3);
1351 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1354 s->mpeg_f_code[0][0] = f_code;
1355 s->mpeg_f_code[0][1] = f_code;
1357 if (s->pict_type == AV_PICTURE_TYPE_B) {
1358 s->full_pel[1] = get_bits1(&s->gb);
1359 f_code = get_bits(&s->gb, 3);
1360 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1363 s->mpeg_f_code[1][0] = f_code;
1364 s->mpeg_f_code[1][1] = f_code;
1366 s->current_picture.f.pict_type = s->pict_type;
1367 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1369 if (avctx->debug & FF_DEBUG_PICT_INFO)
1370 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1377 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1379 MpegEncContext *s= &s1->mpeg_enc_ctx;
1380 int horiz_size_ext, vert_size_ext;
1383 skip_bits(&s->gb, 1); /* profile and level esc*/
1384 s->avctx->profile = get_bits(&s->gb, 3);
1385 s->avctx->level = get_bits(&s->gb, 4);
1386 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1387 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1388 horiz_size_ext = get_bits(&s->gb, 2);
1389 vert_size_ext = get_bits(&s->gb, 2);
1390 s->width |= (horiz_size_ext << 12);
1391 s->height |= (vert_size_ext << 12);
1392 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1393 s->bit_rate += (bit_rate_ext << 18) * 400;
1394 skip_bits1(&s->gb); /* marker */
1395 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1397 s->low_delay = get_bits1(&s->gb);
1398 if (s->flags & CODEC_FLAG_LOW_DELAY)
1401 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1402 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1404 av_dlog(s->avctx, "sequence extension\n");
1405 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1407 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1408 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1409 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1413 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1415 MpegEncContext *s = &s1->mpeg_enc_ctx;
1416 int color_description, w, h;
1418 skip_bits(&s->gb, 3); /* video format */
1419 color_description = get_bits1(&s->gb);
1420 if (color_description) {
1421 s->avctx->color_primaries = get_bits(&s->gb, 8);
1422 s->avctx->color_trc = get_bits(&s->gb, 8);
1423 s->avctx->colorspace = get_bits(&s->gb, 8);
1425 w = get_bits(&s->gb, 14);
1426 skip_bits(&s->gb, 1); //marker
1427 h = get_bits(&s->gb, 14);
1428 // remaining 3 bits are zero padding
1430 s1->pan_scan.width = 16 * w;
1431 s1->pan_scan.height = 16 * h;
1433 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1434 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1437 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1439 MpegEncContext *s = &s1->mpeg_enc_ctx;
1443 if (s->progressive_sequence) {
1444 if (s->repeat_first_field) {
1446 if (s->top_field_first)
1450 if (s->picture_structure == PICT_FRAME) {
1452 if (s->repeat_first_field)
1456 for (i = 0; i < nofco; i++) {
1457 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1458 skip_bits(&s->gb, 1); // marker
1459 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1460 skip_bits(&s->gb, 1); // marker
1463 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1464 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1465 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1466 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1467 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1470 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1474 for (i = 0; i < 64; i++) {
1475 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1476 int v = get_bits(&s->gb, 8);
1478 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1481 if (intra && i == 0 && v != 8) {
1482 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1483 v = 8; // needed by pink.mpg / issue1046
1492 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1494 av_dlog(s->avctx, "matrix extension\n");
1496 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1497 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1498 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1499 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1502 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1504 MpegEncContext *s = &s1->mpeg_enc_ctx;
1506 s->full_pel[0] = s->full_pel[1] = 0;
1507 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1508 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1509 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1510 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1511 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1512 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1513 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1514 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1515 s->pict_type = AV_PICTURE_TYPE_I;
1517 s->pict_type = AV_PICTURE_TYPE_P;
1519 s->pict_type = AV_PICTURE_TYPE_B;
1520 s->current_picture.f.pict_type = s->pict_type;
1521 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1523 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1524 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1525 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1526 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1528 s->intra_dc_precision = get_bits(&s->gb, 2);
1529 s->picture_structure = get_bits(&s->gb, 2);
1530 s->top_field_first = get_bits1(&s->gb);
1531 s->frame_pred_frame_dct = get_bits1(&s->gb);
1532 s->concealment_motion_vectors = get_bits1(&s->gb);
1533 s->q_scale_type = get_bits1(&s->gb);
1534 s->intra_vlc_format = get_bits1(&s->gb);
1535 s->alternate_scan = get_bits1(&s->gb);
1536 s->repeat_first_field = get_bits1(&s->gb);
1537 s->chroma_420_type = get_bits1(&s->gb);
1538 s->progressive_frame = get_bits1(&s->gb);
1541 if (s->alternate_scan) {
1542 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1543 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1545 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1546 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1549 /* composite display not parsed */
1550 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1551 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1552 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1553 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1554 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1555 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1556 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1557 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1558 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1561 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1563 AVCodecContext *avctx = s->avctx;
1564 Mpeg1Context *s1 = (Mpeg1Context*)s;
1566 /* start frame decoding */
1567 if (s->first_field || s->picture_structure == PICT_FRAME) {
1568 AVFrameSideData *pan_scan;
1570 if (ff_MPV_frame_start(s, avctx) < 0)
1573 ff_mpeg_er_frame_start(s);
1575 /* first check if we must repeat the frame */
1576 s->current_picture_ptr->f.repeat_pict = 0;
1577 if (s->repeat_first_field) {
1578 if (s->progressive_sequence) {
1579 if (s->top_field_first)
1580 s->current_picture_ptr->f.repeat_pict = 4;
1582 s->current_picture_ptr->f.repeat_pict = 2;
1583 } else if (s->progressive_frame) {
1584 s->current_picture_ptr->f.repeat_pict = 1;
1588 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1589 AV_FRAME_DATA_PANSCAN,
1590 sizeof(s1->pan_scan));
1592 return AVERROR(ENOMEM);
1593 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1595 if (s1->a53_caption) {
1596 AVFrameSideData *sd = av_frame_new_side_data(
1597 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1598 s1->a53_caption_size);
1600 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1601 av_freep(&s1->a53_caption);
1603 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1604 ff_thread_finish_setup(avctx);
1605 } else { // second field
1608 if (!s->current_picture_ptr) {
1609 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1613 if (s->avctx->hwaccel &&
1614 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1615 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1616 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1619 for (i = 0; i < 4; i++) {
1620 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1621 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1622 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1627 if (avctx->hwaccel) {
1628 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1633 FF_DISABLE_DEPRECATION_WARNINGS
1634 // MPV_frame_start will call this function too,
1635 // but we need to call it on every field
1636 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1637 if (ff_xvmc_field_start(s, avctx) < 0)
1639 FF_ENABLE_DEPRECATION_WARNINGS
1640 #endif /* FF_API_XVMC */
1645 #define DECODE_SLICE_ERROR -1
1646 #define DECODE_SLICE_OK 0
1650 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1651 * @return DECODE_SLICE_ERROR if the slice is damaged,
1652 * DECODE_SLICE_OK if this slice is OK
1654 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1655 const uint8_t **buf, int buf_size)
1657 AVCodecContext *avctx = s->avctx;
1658 const int lowres = s->avctx->lowres;
1659 const int field_pic = s->picture_structure != PICT_FRAME;
1662 s->resync_mb_y = -1;
1664 av_assert0(mb_y < s->mb_height);
1666 init_get_bits(&s->gb, *buf, buf_size * 8);
1667 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1668 skip_bits(&s->gb, 3);
1670 ff_mpeg1_clean_buffers(s);
1671 s->interlaced_dct = 0;
1673 s->qscale = get_qscale(s);
1675 if (s->qscale == 0) {
1676 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1680 /* extra slice info */
1681 if (skip_1stop_8data_bits(&s->gb) < 0)
1682 return AVERROR_INVALIDDATA;
1686 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1689 while (get_bits_left(&s->gb) > 0) {
1690 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1691 MBINCR_VLC_BITS, 2);
1693 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1700 /* otherwise, stuffing, nothing to do */
1708 if (s->mb_x >= (unsigned)s->mb_width) {
1709 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1713 if (avctx->hwaccel) {
1714 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1715 int start_code = -1;
1716 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1717 if (buf_end < *buf + buf_size)
1720 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1721 return DECODE_SLICE_ERROR;
1723 return DECODE_SLICE_OK;
1726 s->resync_mb_x = s->mb_x;
1727 s->resync_mb_y = s->mb_y = mb_y;
1729 ff_init_block_index(s);
1731 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1732 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1733 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",
1734 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],
1735 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")),
1736 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1737 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1738 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1744 FF_DISABLE_DEPRECATION_WARNINGS
1745 // If 1, we memcpy blocks in xvmcvideo.
1746 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1747 ff_xvmc_init_block(s); // set s->block
1748 FF_ENABLE_DEPRECATION_WARNINGS
1749 #endif /* FF_API_XVMC */
1751 if (mpeg_decode_mb(s, s->block) < 0)
1754 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1755 const int wrap = s->b8_stride;
1756 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1757 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1758 int motion_x, motion_y, dir, i;
1760 for (i = 0; i < 2; i++) {
1761 for (dir = 0; dir < 2; dir++) {
1762 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1763 motion_x = motion_y = 0;
1764 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1765 motion_x = s->mv[dir][0][0];
1766 motion_y = s->mv[dir][0][1];
1767 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1768 motion_x = s->mv[dir][i][0];
1769 motion_y = s->mv[dir][i][1];
1772 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1773 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1774 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1775 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1776 s->current_picture.ref_index [dir][b8_xy ] =
1777 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1778 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1785 s->dest[0] += 16 >> lowres;
1786 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1787 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1789 ff_MPV_decode_mb(s, s->block);
1791 if (++s->mb_x >= s->mb_width) {
1792 const int mb_size = 16 >> s->avctx->lowres;
1794 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1795 ff_MPV_report_decode_progress(s);
1798 s->mb_y += 1 << field_pic;
1800 if (s->mb_y >= s->mb_height) {
1801 int left = get_bits_left(&s->gb);
1802 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1803 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1804 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1806 if (left >= 32 && !is_d10) {
1807 GetBitContext gb = s->gb;
1808 align_get_bits(&gb);
1809 if (show_bits(&gb, 24) == 0x060E2B) {
1810 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1815 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1816 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1817 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1823 ff_init_block_index(s);
1826 /* skip mb handling */
1827 if (s->mb_skip_run == -1) {
1828 /* read increment again */
1831 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1832 MBINCR_VLC_BITS, 2);
1834 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1839 s->mb_skip_run += 33;
1840 } else if (code == 35) {
1841 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1842 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1845 goto eos; /* end of slice */
1847 /* otherwise, stuffing, nothing to do */
1849 s->mb_skip_run += code;
1853 if (s->mb_skip_run) {
1855 if (s->pict_type == AV_PICTURE_TYPE_I) {
1856 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1862 for (i = 0; i < 12; i++)
1863 s->block_last_index[i] = -1;
1864 if (s->picture_structure == PICT_FRAME)
1865 s->mv_type = MV_TYPE_16X16;
1867 s->mv_type = MV_TYPE_FIELD;
1868 if (s->pict_type == AV_PICTURE_TYPE_P) {
1869 /* if P type, zero motion vector is implied */
1870 s->mv_dir = MV_DIR_FORWARD;
1871 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1872 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1873 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1874 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1876 /* if B type, reuse previous vectors and directions */
1877 s->mv[0][0][0] = s->last_mv[0][0][0];
1878 s->mv[0][0][1] = s->last_mv[0][0][1];
1879 s->mv[1][0][0] = s->last_mv[1][0][0];
1880 s->mv[1][0][1] = s->last_mv[1][0][1];
1885 eos: // end of slice
1886 *buf += (get_bits_count(&s->gb)-1)/8;
1887 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1891 static int slice_decode_thread(AVCodecContext *c, void *arg)
1893 MpegEncContext *s = *(void**)arg;
1894 const uint8_t *buf = s->gb.buffer;
1895 int mb_y = s->start_mb_y;
1896 const int field_pic = s->picture_structure != PICT_FRAME;
1898 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1901 uint32_t start_code;
1904 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1906 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1907 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1908 s->start_mb_y, s->end_mb_y, s->er.error_count);
1910 if (c->err_recognition & AV_EF_EXPLODE)
1912 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1913 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);
1915 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);
1918 if (s->mb_y == s->end_mb_y)
1922 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1923 mb_y= start_code - SLICE_MIN_START_CODE;
1924 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1925 mb_y += (*buf&0xE0)<<2;
1927 if (s->picture_structure == PICT_BOTTOM_FIELD)
1929 if (mb_y < 0 || mb_y >= s->end_mb_y)
1935 * Handle slice ends.
1936 * @return 1 if it seems to be the last slice
1938 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1940 Mpeg1Context *s1 = avctx->priv_data;
1941 MpegEncContext *s = &s1->mpeg_enc_ctx;
1943 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1946 if (s->avctx->hwaccel) {
1947 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1948 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1952 FF_DISABLE_DEPRECATION_WARNINGS
1953 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1954 ff_xvmc_field_end(s);
1955 FF_ENABLE_DEPRECATION_WARNINGS
1956 #endif /* FF_API_XVMC */
1958 /* end of slice reached */
1959 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1962 ff_er_frame_end(&s->er);
1964 ff_MPV_frame_end(s);
1966 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1967 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1970 ff_print_debug_info(s, s->current_picture_ptr, pict);
1971 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1973 if (avctx->active_thread_type & FF_THREAD_FRAME)
1974 s->picture_number++;
1975 /* latency of 1 frame for I- and P-frames */
1976 /* XXX: use another variable than picture_number */
1977 if (s->last_picture_ptr != NULL) {
1978 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1981 ff_print_debug_info(s, s->last_picture_ptr, pict);
1982 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1992 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1993 const uint8_t *buf, int buf_size)
1995 Mpeg1Context *s1 = avctx->priv_data;
1996 MpegEncContext *s = &s1->mpeg_enc_ctx;
2000 init_get_bits(&s->gb, buf, buf_size*8);
2002 width = get_bits(&s->gb, 12);
2003 height = get_bits(&s->gb, 12);
2004 if (width == 0 || height == 0) {
2005 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
2007 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2008 return AVERROR_INVALIDDATA;
2010 s->aspect_ratio_info = get_bits(&s->gb, 4);
2011 if (s->aspect_ratio_info == 0) {
2012 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2013 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2016 s->frame_rate_index = get_bits(&s->gb, 4);
2017 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2019 s->bit_rate = get_bits(&s->gb, 18) * 400;
2020 if (get_bits1(&s->gb) == 0) /* marker */
2025 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2026 skip_bits(&s->gb, 1);
2029 if (get_bits1(&s->gb)) {
2030 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2032 for (i = 0; i < 64; i++) {
2033 j = s->dsp.idct_permutation[i];
2034 v = ff_mpeg1_default_intra_matrix[i];
2035 s->intra_matrix[j] = v;
2036 s->chroma_intra_matrix[j] = v;
2039 if (get_bits1(&s->gb)) {
2040 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2042 for (i = 0; i < 64; i++) {
2043 int j = s->dsp.idct_permutation[i];
2044 v = ff_mpeg1_default_non_intra_matrix[i];
2045 s->inter_matrix[j] = v;
2046 s->chroma_inter_matrix[j] = v;
2050 if (show_bits(&s->gb, 23) != 0) {
2051 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2055 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2056 s->progressive_sequence = 1;
2057 s->progressive_frame = 1;
2058 s->picture_structure = PICT_FRAME;
2060 s->frame_pred_frame_dct = 1;
2061 s->chroma_format = 1;
2062 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2063 s->out_format = FMT_MPEG1;
2064 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2065 if (s->flags & CODEC_FLAG_LOW_DELAY)
2068 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2069 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2070 s->avctx->rc_buffer_size, s->bit_rate);
2075 static int vcr2_init_sequence(AVCodecContext *avctx)
2077 Mpeg1Context *s1 = avctx->priv_data;
2078 MpegEncContext *s = &s1->mpeg_enc_ctx;
2081 /* start new MPEG-1 context decoding */
2082 s->out_format = FMT_MPEG1;
2083 if (s1->mpeg_enc_ctx_allocated) {
2084 ff_MPV_common_end(s);
2085 s1->mpeg_enc_ctx_allocated = 0;
2087 s->width = avctx->coded_width;
2088 s->height = avctx->coded_height;
2089 avctx->has_b_frames = 0; // true?
2092 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2093 setup_hwaccel_for_pixfmt(avctx);
2095 if (ff_MPV_common_init(s) < 0)
2097 s1->mpeg_enc_ctx_allocated = 1;
2099 for (i = 0; i < 64; i++) {
2100 int j = s->dsp.idct_permutation[i];
2101 v = ff_mpeg1_default_intra_matrix[i];
2102 s->intra_matrix[j] = v;
2103 s->chroma_intra_matrix[j] = v;
2105 v = ff_mpeg1_default_non_intra_matrix[i];
2106 s->inter_matrix[j] = v;
2107 s->chroma_inter_matrix[j] = v;
2110 s->progressive_sequence = 1;
2111 s->progressive_frame = 1;
2112 s->picture_structure = PICT_FRAME;
2114 s->frame_pred_frame_dct = 1;
2115 s->chroma_format = 1;
2116 if (s->codec_tag == AV_RL32("BW10")) {
2117 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2119 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2120 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2122 s1->save_width = s->width;
2123 s1->save_height = s->height;
2124 s1->save_progressive_seq = s->progressive_sequence;
2129 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2130 const uint8_t *p, int buf_size)
2132 Mpeg1Context *s1 = avctx->priv_data;
2134 if (buf_size >= 6 &&
2135 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2136 p[4] == 3 && (p[5] & 0x40)) {
2137 /* extract A53 Part 4 CC data */
2138 int cc_count = p[5] & 0x1f;
2139 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2140 av_freep(&s1->a53_caption);
2141 s1->a53_caption_size = cc_count * 3;
2142 s1->a53_caption = av_malloc(s1->a53_caption_size);
2143 if (s1->a53_caption) {
2144 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2148 } else if (buf_size >= 11 &&
2149 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2150 /* extract DVD CC data */
2153 // There is a caption count field in the data, but it is often
2154 // incorect. So count the number of captions present.
2155 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2157 // Transform the DVD format into A53 Part 4 format
2159 av_freep(&s1->a53_caption);
2160 s1->a53_caption_size = cc_count * 6;
2161 s1->a53_caption = av_malloc(s1->a53_caption_size);
2162 if (s1->a53_caption) {
2163 uint8_t field1 = !!(p[4] & 0x80);
2164 uint8_t *cap = s1->a53_caption;
2166 for (i = 0; i < cc_count; i++) {
2167 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2170 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2183 static void mpeg_decode_user_data(AVCodecContext *avctx,
2184 const uint8_t *p, int buf_size)
2186 Mpeg1Context *s = avctx->priv_data;
2187 const uint8_t *buf_end = p + buf_size;
2192 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2196 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2197 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2199 av_log(avctx, AV_LOG_ERROR, "\n");*/
2202 /* we parse the DTG active format information */
2203 if (buf_end - p >= 5 &&
2204 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2212 if (buf_end - p < 1)
2214 avctx->dtg_active_format = p[0] & 0x0f;
2216 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2221 static void mpeg_decode_gop(AVCodecContext *avctx,
2222 const uint8_t *buf, int buf_size)
2224 Mpeg1Context *s1 = avctx->priv_data;
2225 MpegEncContext *s = &s1->mpeg_enc_ctx;
2229 init_get_bits(&s->gb, buf, buf_size*8);
2231 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2233 s->closed_gop = get_bits1(&s->gb);
2234 /*broken_link indicate that after editing the
2235 reference frames of the first B-Frames after GOP I-Frame
2236 are missing (open gop)*/
2237 broken_link = get_bits1(&s->gb);
2239 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2240 char tcbuf[AV_TIMECODE_STR_SIZE];
2241 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2242 av_log(s->avctx, AV_LOG_DEBUG,
2243 "GOP (%s) closed_gop=%d broken_link=%d\n",
2244 tcbuf, s->closed_gop, broken_link);
2248 static int decode_chunks(AVCodecContext *avctx,
2249 AVFrame *picture, int *got_output,
2250 const uint8_t *buf, int buf_size)
2252 Mpeg1Context *s = avctx->priv_data;
2253 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2254 const uint8_t *buf_ptr = buf;
2255 const uint8_t *buf_end = buf + buf_size;
2256 int ret, input_size;
2257 int last_code = 0, skip_frame = 0;
2258 int picture_start_code_seen = 0;
2261 /* find next start code */
2262 uint32_t start_code = -1;
2263 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2264 if (start_code > 0x1ff) {
2266 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2269 av_assert0(avctx->thread_count > 1);
2271 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2272 for (i = 0; i < s->slice_count; i++)
2273 s2->er.error_count += s2->thread_context[i]->er.error_count;
2276 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2277 && uses_vdpau(avctx))
2278 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2280 ret = slice_end(avctx, picture);
2284 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2290 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2291 return AVERROR_INVALIDDATA;
2293 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2296 input_size = buf_end - buf_ptr;
2298 if (avctx->debug & FF_DEBUG_STARTCODE) {
2299 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2302 /* prepare data for next start code */
2303 switch (start_code) {
2304 case SEQ_START_CODE:
2305 if (last_code == 0) {
2306 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2307 if(buf != avctx->extradata)
2310 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2311 if (avctx->err_recognition & AV_EF_EXPLODE)
2312 return AVERROR_INVALIDDATA;
2316 case PICTURE_START_CODE:
2317 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2318 /* If it's a frame picture, there can't be more than one picture header.
2319 Yet, it does happen and we need to handle it. */
2320 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2323 picture_start_code_seen = 1;
2325 if (s2->width <= 0 || s2->height <= 0) {
2326 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2327 s2->width, s2->height);
2328 return AVERROR_INVALIDDATA;
2332 s2->intra_dc_precision= 3;
2333 s2->intra_matrix[0]= 1;
2335 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2336 !avctx->hwaccel && s->slice_count) {
2339 avctx->execute(avctx, slice_decode_thread,
2340 s2->thread_context, NULL,
2341 s->slice_count, sizeof(void*));
2342 for (i = 0; i < s->slice_count; i++)
2343 s2->er.error_count += s2->thread_context[i]->er.error_count;
2346 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2347 ret = mpeg_decode_postinit(avctx);
2349 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2353 /* we have a complete image: we try to decompress it */
2354 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2357 last_code = PICTURE_START_CODE;
2359 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2360 if (avctx->err_recognition & AV_EF_EXPLODE)
2361 return AVERROR_INVALIDDATA;
2364 case EXT_START_CODE:
2365 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2367 switch (get_bits(&s2->gb, 4)) {
2369 if (last_code == 0) {
2370 mpeg_decode_sequence_extension(s);
2372 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2373 if (avctx->err_recognition & AV_EF_EXPLODE)
2374 return AVERROR_INVALIDDATA;
2378 mpeg_decode_sequence_display_extension(s);
2381 mpeg_decode_quant_matrix_extension(s2);
2384 mpeg_decode_picture_display_extension(s);
2387 if (last_code == PICTURE_START_CODE) {
2388 mpeg_decode_picture_coding_extension(s);
2390 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2391 if (avctx->err_recognition & AV_EF_EXPLODE)
2392 return AVERROR_INVALIDDATA;
2397 case USER_START_CODE:
2398 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2400 case GOP_START_CODE:
2401 if (last_code == 0) {
2403 mpeg_decode_gop(avctx, buf_ptr, input_size);
2406 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2407 if (avctx->err_recognition & AV_EF_EXPLODE)
2408 return AVERROR_INVALIDDATA;
2412 if (start_code >= SLICE_MIN_START_CODE &&
2413 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2415 if (s2->progressive_sequence && !s2->progressive_frame) {
2416 s2->progressive_frame = 1;
2417 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2420 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2421 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2422 s2->picture_structure = PICT_FRAME;
2425 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2426 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2429 if (s2->picture_structure == PICT_FRAME) {
2430 s2->first_field = 0;
2431 s2->v_edge_pos = 16 * s2->mb_height;
2433 s2->first_field ^= 1;
2434 s2->v_edge_pos = 8 * s2->mb_height;
2435 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2438 if (start_code >= SLICE_MIN_START_CODE &&
2439 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2440 const int field_pic = s2->picture_structure != PICT_FRAME;
2441 int mb_y = start_code - SLICE_MIN_START_CODE;
2442 last_code = SLICE_MIN_START_CODE;
2443 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2444 mb_y += (*buf_ptr&0xE0)<<2;
2447 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2450 if (buf_end - buf_ptr < 2) {
2451 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2452 return AVERROR_INVALIDDATA;
2455 if (mb_y >= s2->mb_height) {
2456 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2460 if (s2->last_picture_ptr == NULL) {
2461 /* Skip B-frames if we do not have reference frames and gop is not closed */
2462 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2463 if (!s2->closed_gop) {
2469 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2471 if (s2->next_picture_ptr == NULL) {
2472 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2473 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2478 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2479 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2480 avctx->skip_frame >= AVDISCARD_ALL) {
2485 if (!s->mpeg_enc_ctx_allocated)
2488 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2489 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2493 if (!s2->pict_type) {
2494 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2495 if (avctx->err_recognition & AV_EF_EXPLODE)
2496 return AVERROR_INVALIDDATA;
2500 if (s->first_slice) {
2503 if (mpeg_field_start(s2, buf, buf_size) < 0)
2506 if (!s2->current_picture_ptr) {
2507 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2508 return AVERROR_INVALIDDATA;
2511 if (uses_vdpau(avctx)) {
2516 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2518 int threshold = (s2->mb_height * s->slice_count +
2519 s2->slice_context_count / 2) /
2520 s2->slice_context_count;
2521 av_assert0(avctx->thread_count > 1);
2522 if (threshold <= mb_y) {
2523 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2525 thread_context->start_mb_y = mb_y;
2526 thread_context->end_mb_y = s2->mb_height;
2527 if (s->slice_count) {
2528 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2529 ret = ff_update_duplicate_context(thread_context,
2534 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2537 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2539 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2543 if (avctx->err_recognition & AV_EF_EXPLODE)
2545 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2546 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);
2548 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);
2557 static int mpeg_decode_frame(AVCodecContext *avctx,
2558 void *data, int *got_output,
2561 const uint8_t *buf = avpkt->data;
2563 int buf_size = avpkt->size;
2564 Mpeg1Context *s = avctx->priv_data;
2565 AVFrame *picture = data;
2566 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2567 av_dlog(avctx, "fill_buffer\n");
2569 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2570 /* special case for last picture */
2571 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2572 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2576 s2->next_picture_ptr = NULL;
2583 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2584 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2586 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2590 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2591 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2592 || s2->codec_tag == AV_RL32("BW10")
2594 vcr2_init_sequence(avctx);
2598 if (avctx->extradata && !s->extradata_decoded) {
2599 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2601 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2604 s->extradata_decoded = 1;
2605 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2606 s2->current_picture_ptr = NULL;
2611 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2612 if (ret<0 || *got_output)
2613 s2->current_picture_ptr = NULL;
2619 static void flush(AVCodecContext *avctx)
2621 Mpeg1Context *s = avctx->priv_data;
2625 ff_mpeg_flush(avctx);
2628 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2630 Mpeg1Context *s = avctx->priv_data;
2632 if (s->mpeg_enc_ctx_allocated)
2633 ff_MPV_common_end(&s->mpeg_enc_ctx);
2634 av_freep(&s->a53_caption);
2638 static const AVProfile mpeg2_video_profiles[] = {
2639 { FF_PROFILE_MPEG2_422, "4:2:2" },
2640 { FF_PROFILE_MPEG2_HIGH, "High" },
2641 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2642 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2643 { FF_PROFILE_MPEG2_MAIN, "Main" },
2644 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2645 { FF_PROFILE_RESERVED, "Reserved" },
2646 { FF_PROFILE_RESERVED, "Reserved" },
2647 { FF_PROFILE_UNKNOWN },
2651 AVCodec ff_mpeg1video_decoder = {
2652 .name = "mpeg1video",
2653 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2654 .type = AVMEDIA_TYPE_VIDEO,
2655 .id = AV_CODEC_ID_MPEG1VIDEO,
2656 .priv_data_size = sizeof(Mpeg1Context),
2657 .init = mpeg_decode_init,
2658 .close = mpeg_decode_end,
2659 .decode = mpeg_decode_frame,
2660 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2661 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2662 CODEC_CAP_SLICE_THREADS,
2665 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2668 AVCodec ff_mpeg2video_decoder = {
2669 .name = "mpeg2video",
2670 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2671 .type = AVMEDIA_TYPE_VIDEO,
2672 .id = AV_CODEC_ID_MPEG2VIDEO,
2673 .priv_data_size = sizeof(Mpeg1Context),
2674 .init = mpeg_decode_init,
2675 .close = mpeg_decode_end,
2676 .decode = mpeg_decode_frame,
2677 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2678 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2679 CODEC_CAP_SLICE_THREADS,
2682 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2686 AVCodec ff_mpegvideo_decoder = {
2687 .name = "mpegvideo",
2688 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2689 .type = AVMEDIA_TYPE_VIDEO,
2690 .id = AV_CODEC_ID_MPEG2VIDEO,
2691 .priv_data_size = sizeof(Mpeg1Context),
2692 .init = mpeg_decode_init,
2693 .close = mpeg_decode_end,
2694 .decode = mpeg_decode_frame,
2695 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2701 #if CONFIG_MPEG_XVMC_DECODER
2702 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2704 if (avctx->active_thread_type & FF_THREAD_SLICE)
2706 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2708 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2709 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2711 mpeg_decode_init(avctx);
2713 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2714 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2719 AVCodec ff_mpeg_xvmc_decoder = {
2720 .name = "mpegvideo_xvmc",
2721 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2722 .type = AVMEDIA_TYPE_VIDEO,
2723 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2724 .priv_data_size = sizeof(Mpeg1Context),
2725 .init = mpeg_mc_decode_init,
2726 .close = mpeg_decode_end,
2727 .decode = mpeg_decode_frame,
2728 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2729 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2734 #endif /* FF_API_XVMC */
2736 #if CONFIG_MPEG_VDPAU_DECODER
2737 AVCodec ff_mpeg_vdpau_decoder = {
2738 .name = "mpegvideo_vdpau",
2739 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2740 .type = AVMEDIA_TYPE_VIDEO,
2741 .id = AV_CODEC_ID_MPEG2VIDEO,
2742 .priv_data_size = sizeof(Mpeg1Context),
2743 .init = mpeg_decode_init,
2744 .close = mpeg_decode_end,
2745 .decode = mpeg_decode_frame,
2746 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2747 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2752 #if CONFIG_MPEG1_VDPAU_DECODER
2753 AVCodec ff_mpeg1_vdpau_decoder = {
2754 .name = "mpeg1video_vdpau",
2755 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2756 .type = AVMEDIA_TYPE_VIDEO,
2757 .id = AV_CODEC_ID_MPEG1VIDEO,
2758 .priv_data_size = sizeof(Mpeg1Context),
2759 .init = mpeg_decode_init,
2760 .close = mpeg_decode_end,
2761 .decode = mpeg_decode_frame,
2762 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2763 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,