3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/attributes.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/stereo3d.h"
34 #include "mpegvideo.h"
35 #include "error_resilience.h"
37 #include "mpeg12data.h"
38 #include "bytestream.h"
39 #include "vdpau_internal.h"
40 #include "xvmc_internal.h"
44 typedef struct Mpeg1Context {
45 MpegEncContext mpeg_enc_ctx;
46 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
47 int repeat_field; /* true if we must repeat the field */
48 AVPanScan pan_scan; /**< some temporary storage for the panscan */
53 int save_width, save_height, save_progressive_seq;
54 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
55 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
58 int extradata_decoded;
61 #define MB_TYPE_ZERO_MV 0x20000000
63 static const uint32_t ptype2mb_type[7] = {
65 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
67 MB_TYPE_L0 | MB_TYPE_CBP,
68 MB_TYPE_QUANT | MB_TYPE_INTRA,
69 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
70 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
73 static const uint32_t btype2mb_type[11] = {
76 MB_TYPE_L1 | MB_TYPE_CBP,
78 MB_TYPE_L0 | MB_TYPE_CBP,
80 MB_TYPE_L0L1 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_INTRA,
82 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
83 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
84 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
87 static const uint8_t non_linear_qscale[32] = {
88 0, 1, 2, 3, 4, 5, 6, 7,
89 8,10,12,14,16,18,20,22,
90 24,28,32,36,40,44,48,52,
91 56,64,72,80,88,96,104,112,
94 /* as H.263, but only 17 codes */
95 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
97 int code, sign, val, shift;
99 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
107 sign = get_bits1(&s->gb);
111 val = (val - 1) << shift;
112 val |= get_bits(&s->gb, shift);
119 /* modulo decoding */
120 return sign_extend(val, 5 + shift);
123 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
125 int level, dc, diff, i, j, run;
127 RLTable *rl = &ff_rl_mpeg1;
128 uint8_t * const scantable = s->intra_scantable.permutated;
129 const uint16_t *quant_matrix = s->intra_matrix;
130 const int qscale = s->qscale;
133 component = (n <= 3 ? 0 : n - 4 + 1);
134 diff = decode_dc(&s->gb, component);
137 dc = s->last_dc[component];
139 s->last_dc[component] = dc;
140 block[0] = dc * quant_matrix[0];
141 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
144 OPEN_READER(re, &s->gb);
145 UPDATE_CACHE(re, &s->gb);
146 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
149 /* now quantify & encode AC coefficients */
151 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
156 level = (level * qscale * quant_matrix[j]) >> 4;
157 level = (level - 1) | 1;
158 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
159 SKIP_BITS(re, &s->gb, 1);
162 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
163 UPDATE_CACHE(re, &s->gb);
164 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
166 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
167 } else if (level == 0) {
168 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
174 level = (level * qscale * quant_matrix[j]) >> 4;
175 level = (level - 1) | 1;
178 level = (level * qscale * quant_matrix[j]) >> 4;
179 level = (level - 1) | 1;
183 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
188 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
191 UPDATE_CACHE(re, &s->gb);
194 LAST_SKIP_BITS(re, &s->gb, 2);
195 CLOSE_READER(re, &s->gb);
197 s->block_last_index[n] = i;
201 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
203 return mpeg1_decode_block_intra(s, block, n);
206 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
208 int level, i, j, run;
209 RLTable *rl = &ff_rl_mpeg1;
210 uint8_t * const scantable = s->intra_scantable.permutated;
211 const uint16_t *quant_matrix = s->inter_matrix;
212 const int qscale = s->qscale;
215 OPEN_READER(re, &s->gb);
217 // special case for first coefficient, no need to add second VLC table
218 UPDATE_CACHE(re, &s->gb);
219 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
220 level = (3 * qscale * quant_matrix[0]) >> 5;
221 level = (level - 1) | 1;
222 if (GET_CACHE(re, &s->gb) & 0x40000000)
226 SKIP_BITS(re, &s->gb, 2);
227 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
230 /* now quantify & encode AC coefficients */
232 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
237 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
238 level = (level - 1) | 1;
239 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
240 SKIP_BITS(re, &s->gb, 1);
243 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
244 UPDATE_CACHE(re, &s->gb);
245 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
247 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
248 } else if (level == 0) {
249 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
255 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
256 level = (level - 1) | 1;
259 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
260 level = (level - 1) | 1;
264 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
269 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
271 UPDATE_CACHE(re, &s->gb);
274 LAST_SKIP_BITS(re, &s->gb, 2);
275 CLOSE_READER(re, &s->gb);
277 s->block_last_index[n] = i;
282 * Note: this function can read out of range and crash for corrupt streams.
283 * Changing this would eat up any speed benefits it has.
284 * Do not use "fast" flag if you need the code to be robust.
286 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
288 int level, i, j, run;
289 RLTable *rl = &ff_rl_mpeg1;
290 uint8_t * const scantable = s->intra_scantable.permutated;
291 const int qscale = s->qscale;
294 OPEN_READER(re, &s->gb);
296 // special case for first coefficient, no need to add second VLC table
297 UPDATE_CACHE(re, &s->gb);
298 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
299 level = (3 * qscale) >> 1;
300 level = (level - 1) | 1;
301 if (GET_CACHE(re, &s->gb) & 0x40000000)
305 SKIP_BITS(re, &s->gb, 2);
306 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
310 /* now quantify & encode AC coefficients */
312 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
317 level = ((level * 2 + 1) * qscale) >> 1;
318 level = (level - 1) | 1;
319 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
320 SKIP_BITS(re, &s->gb, 1);
323 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
324 UPDATE_CACHE(re, &s->gb);
325 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
327 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
328 } else if (level == 0) {
329 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
335 level = ((level * 2 + 1) * qscale) >> 1;
336 level = (level - 1) | 1;
339 level = ((level * 2 + 1) * qscale) >> 1;
340 level = (level - 1) | 1;
345 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF || i >= 64)
347 UPDATE_CACHE(re, &s->gb);
350 LAST_SKIP_BITS(re, &s->gb, 2);
351 CLOSE_READER(re, &s->gb);
353 s->block_last_index[n] = i;
358 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
360 int level, i, j, run;
361 RLTable *rl = &ff_rl_mpeg1;
362 uint8_t * const scantable = s->intra_scantable.permutated;
363 const uint16_t *quant_matrix;
364 const int qscale = s->qscale;
370 OPEN_READER(re, &s->gb);
373 quant_matrix = s->inter_matrix;
375 quant_matrix = s->chroma_inter_matrix;
377 // special case for first coefficient, no need to add second VLC table
378 UPDATE_CACHE(re, &s->gb);
379 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
380 level= (3 * qscale * quant_matrix[0]) >> 5;
381 if (GET_CACHE(re, &s->gb) & 0x40000000)
386 SKIP_BITS(re, &s->gb, 2);
387 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
391 /* now quantify & encode AC coefficients */
393 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
398 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
399 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
400 SKIP_BITS(re, &s->gb, 1);
403 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
404 UPDATE_CACHE(re, &s->gb);
405 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
410 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
413 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
417 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
423 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
425 UPDATE_CACHE(re, &s->gb);
428 LAST_SKIP_BITS(re, &s->gb, 2);
429 CLOSE_READER(re, &s->gb);
431 block[63] ^= (mismatch & 1);
433 s->block_last_index[n] = i;
438 * Note: this function can read out of range and crash for corrupt streams.
439 * Changing this would eat up any speed benefits it has.
440 * Do not use "fast" flag if you need the code to be robust.
442 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
443 int16_t *block, int n)
445 int level, i, j, run;
446 RLTable *rl = &ff_rl_mpeg1;
447 uint8_t * const scantable = s->intra_scantable.permutated;
448 const int qscale = s->qscale;
449 OPEN_READER(re, &s->gb);
452 // special case for first coefficient, no need to add second VLC table
453 UPDATE_CACHE(re, &s->gb);
454 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
455 level = (3 * qscale) >> 1;
456 if (GET_CACHE(re, &s->gb) & 0x40000000)
460 SKIP_BITS(re, &s->gb, 2);
461 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
465 /* now quantify & encode AC coefficients */
467 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
472 level = ((level * 2 + 1) * qscale) >> 1;
473 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
474 SKIP_BITS(re, &s->gb, 1);
477 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
478 UPDATE_CACHE(re, &s->gb);
479 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
484 level = ((-level * 2 + 1) * qscale) >> 1;
487 level = ((level * 2 + 1) * qscale) >> 1;
492 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF || i >= 64)
495 UPDATE_CACHE(re, &s->gb);
498 LAST_SKIP_BITS(re, &s->gb, 2);
499 CLOSE_READER(re, &s->gb);
500 s->block_last_index[n] = i;
505 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
507 int level, dc, diff, i, j, run;
510 uint8_t * const scantable = s->intra_scantable.permutated;
511 const uint16_t *quant_matrix;
512 const int qscale = s->qscale;
517 quant_matrix = s->intra_matrix;
520 quant_matrix = s->chroma_intra_matrix;
521 component = (n & 1) + 1;
523 diff = decode_dc(&s->gb, component);
526 dc = s->last_dc[component];
528 s->last_dc[component] = dc;
529 block[0] = dc << (3 - s->intra_dc_precision);
530 av_dlog(s->avctx, "dc=%d\n", block[0]);
531 mismatch = block[0] ^ 1;
533 if (s->intra_vlc_format)
539 OPEN_READER(re, &s->gb);
540 /* now quantify & encode AC coefficients */
542 UPDATE_CACHE(re, &s->gb);
543 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
547 } else if (level != 0) {
550 level = (level * qscale * quant_matrix[j]) >> 4;
551 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
552 LAST_SKIP_BITS(re, &s->gb, 1);
555 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
556 UPDATE_CACHE(re, &s->gb);
557 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
561 level = (-level * qscale * quant_matrix[j]) >> 4;
564 level = (level * qscale * quant_matrix[j]) >> 4;
568 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
575 CLOSE_READER(re, &s->gb);
577 block[63] ^= mismatch & 1;
579 s->block_last_index[n] = i;
584 * Note: this function can read out of range and crash for corrupt streams.
585 * Changing this would eat up any speed benefits it has.
586 * Do not use "fast" flag if you need the code to be robust.
588 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
590 int level, dc, diff, j, run;
593 uint8_t * scantable = s->intra_scantable.permutated;
594 const uint16_t *quant_matrix;
595 const int qscale = s->qscale;
599 quant_matrix = s->intra_matrix;
602 quant_matrix = s->chroma_intra_matrix;
603 component = (n & 1) + 1;
605 diff = decode_dc(&s->gb, component);
608 dc = s->last_dc[component];
610 s->last_dc[component] = dc;
611 block[0] = dc << (3 - s->intra_dc_precision);
612 if (s->intra_vlc_format)
618 OPEN_READER(re, &s->gb);
619 /* now quantify & encode AC coefficients */
621 UPDATE_CACHE(re, &s->gb);
622 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
626 } else if (level != 0) {
629 level = (level * qscale * quant_matrix[j]) >> 4;
630 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
631 LAST_SKIP_BITS(re, &s->gb, 1);
634 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
635 UPDATE_CACHE(re, &s->gb);
636 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
640 level = (-level * qscale * quant_matrix[j]) >> 4;
643 level = (level * qscale * quant_matrix[j]) >> 4;
649 CLOSE_READER(re, &s->gb);
652 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
656 /******************************************/
659 static inline int get_dmv(MpegEncContext *s)
661 if (get_bits1(&s->gb))
662 return 1 - (get_bits1(&s->gb) << 1);
667 static inline int get_qscale(MpegEncContext *s)
669 int qscale = get_bits(&s->gb, 5);
670 if (s->q_scale_type) {
671 return non_linear_qscale[qscale];
678 /* motion type (for MPEG-2) */
684 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
686 int i, j, k, cbp, val, mb_type, motion_type;
687 const int mb_block_count = 4 + (1 << s->chroma_format);
689 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
691 av_assert2(s->mb_skipped == 0);
693 if (s->mb_skip_run-- != 0) {
694 if (s->pict_type == AV_PICTURE_TYPE_P) {
696 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
701 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
703 mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
704 if (IS_INTRA(mb_type)) {
705 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
708 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
709 mb_type | MB_TYPE_SKIP;
711 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
718 switch (s->pict_type) {
720 case AV_PICTURE_TYPE_I:
721 if (get_bits1(&s->gb) == 0) {
722 if (get_bits1(&s->gb) == 0) {
723 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
726 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
728 mb_type = MB_TYPE_INTRA;
731 case AV_PICTURE_TYPE_P:
732 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
734 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
737 mb_type = ptype2mb_type[mb_type];
739 case AV_PICTURE_TYPE_B:
740 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
742 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
745 mb_type = btype2mb_type[mb_type];
748 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
749 // motion_type = 0; /* avoid warning */
750 if (IS_INTRA(mb_type)) {
751 s->dsp.clear_blocks(s->block[0]);
753 if (!s->chroma_y_shift) {
754 s->dsp.clear_blocks(s->block[6]);
757 /* compute DCT type */
758 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
759 !s->frame_pred_frame_dct) {
760 s->interlaced_dct = get_bits1(&s->gb);
763 if (IS_QUANT(mb_type))
764 s->qscale = get_qscale(s);
766 if (s->concealment_motion_vectors) {
767 /* just parse them */
768 if (s->picture_structure != PICT_FRAME)
769 skip_bits1(&s->gb); /* field select */
771 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
772 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
773 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
774 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
776 skip_bits1(&s->gb); /* marker */
778 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
780 // if 1, we memcpy blocks in xvmcvideo
781 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
782 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
785 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
786 if (s->flags2 & CODEC_FLAG2_FAST) {
787 for (i = 0; i < 6; i++) {
788 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
791 for (i = 0; i < mb_block_count; i++) {
792 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
797 for (i = 0; i < 6; i++) {
798 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
803 if (mb_type & MB_TYPE_ZERO_MV) {
804 av_assert2(mb_type & MB_TYPE_CBP);
806 s->mv_dir = MV_DIR_FORWARD;
807 if (s->picture_structure == PICT_FRAME) {
808 if (s->picture_structure == PICT_FRAME
809 && !s->frame_pred_frame_dct)
810 s->interlaced_dct = get_bits1(&s->gb);
811 s->mv_type = MV_TYPE_16X16;
813 s->mv_type = MV_TYPE_FIELD;
814 mb_type |= MB_TYPE_INTERLACED;
815 s->field_select[0][0] = s->picture_structure - 1;
818 if (IS_QUANT(mb_type))
819 s->qscale = get_qscale(s);
821 s->last_mv[0][0][0] = 0;
822 s->last_mv[0][0][1] = 0;
823 s->last_mv[0][1][0] = 0;
824 s->last_mv[0][1][1] = 0;
828 av_assert2(mb_type & MB_TYPE_L0L1);
829 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
830 /* get additional motion vector type */
831 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
832 motion_type = MT_FRAME;
834 motion_type = get_bits(&s->gb, 2);
835 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
836 s->interlaced_dct = get_bits1(&s->gb);
839 if (IS_QUANT(mb_type))
840 s->qscale = get_qscale(s);
843 s->mv_dir = (mb_type >> 13) & 3;
844 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
845 switch (motion_type) {
846 case MT_FRAME: /* or MT_16X8 */
847 if (s->picture_structure == PICT_FRAME) {
848 mb_type |= MB_TYPE_16x16;
849 s->mv_type = MV_TYPE_16X16;
850 for (i = 0; i < 2; i++) {
851 if (USES_LIST(mb_type, i)) {
853 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
854 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
855 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
856 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
857 /* full_pel: only for MPEG-1 */
858 if (s->full_pel[i]) {
859 s->mv[i][0][0] <<= 1;
860 s->mv[i][0][1] <<= 1;
865 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
866 s->mv_type = MV_TYPE_16X8;
867 for (i = 0; i < 2; i++) {
868 if (USES_LIST(mb_type, i)) {
870 for (j = 0; j < 2; j++) {
871 s->field_select[i][j] = get_bits1(&s->gb);
872 for (k = 0; k < 2; k++) {
873 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
874 s->last_mv[i][j][k]);
875 s->last_mv[i][j][k] = val;
876 s->mv[i][j][k] = val;
884 s->mv_type = MV_TYPE_FIELD;
885 if (s->picture_structure == PICT_FRAME) {
886 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
887 for (i = 0; i < 2; i++) {
888 if (USES_LIST(mb_type, i)) {
889 for (j = 0; j < 2; j++) {
890 s->field_select[i][j] = get_bits1(&s->gb);
891 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
892 s->last_mv[i][j][0]);
893 s->last_mv[i][j][0] = val;
894 s->mv[i][j][0] = val;
895 av_dlog(s->avctx, "fmx=%d\n", val);
896 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
897 s->last_mv[i][j][1] >> 1);
898 s->last_mv[i][j][1] = val << 1;
899 s->mv[i][j][1] = val;
900 av_dlog(s->avctx, "fmy=%d\n", val);
905 av_assert0(!s->progressive_sequence);
906 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
907 for (i = 0; i < 2; i++) {
908 if (USES_LIST(mb_type, i)) {
909 s->field_select[i][0] = get_bits1(&s->gb);
910 for (k = 0; k < 2; k++) {
911 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
912 s->last_mv[i][0][k]);
913 s->last_mv[i][0][k] = val;
914 s->last_mv[i][1][k] = val;
915 s->mv[i][0][k] = val;
922 if(s->progressive_sequence){
923 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
926 s->mv_type = MV_TYPE_DMV;
927 for (i = 0; i < 2; i++) {
928 if (USES_LIST(mb_type, i)) {
929 int dmx, dmy, mx, my, m;
930 const int my_shift = s->picture_structure == PICT_FRAME;
932 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
933 s->last_mv[i][0][0]);
934 s->last_mv[i][0][0] = mx;
935 s->last_mv[i][1][0] = mx;
937 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
938 s->last_mv[i][0][1] >> my_shift);
942 s->last_mv[i][0][1] = my << my_shift;
943 s->last_mv[i][1][1] = my << my_shift;
947 s->mv[i][1][0] = mx; // not used
948 s->mv[i][1][1] = my; // not used
950 if (s->picture_structure == PICT_FRAME) {
951 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
953 // m = 1 + 2 * s->top_field_first;
954 m = s->top_field_first ? 1 : 3;
956 /* top -> top pred */
957 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
958 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
960 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
961 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
963 mb_type |= MB_TYPE_16x16;
965 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
966 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
967 if (s->picture_structure == PICT_TOP_FIELD)
976 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
982 if (HAS_CBP(mb_type)) {
983 s->dsp.clear_blocks(s->block[0]);
985 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
986 if (mb_block_count > 6) {
987 cbp <<= mb_block_count - 6;
988 cbp |= get_bits(&s->gb, mb_block_count - 6);
989 s->dsp.clear_blocks(s->block[6]);
992 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
996 //if 1, we memcpy blocks in xvmcvideo
997 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
998 ff_xvmc_pack_pblocks(s, cbp);
1001 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1002 if (s->flags2 & CODEC_FLAG2_FAST) {
1003 for (i = 0; i < 6; i++) {
1005 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1007 s->block_last_index[i] = -1;
1012 cbp <<= 12-mb_block_count;
1014 for (i = 0; i < mb_block_count; i++) {
1015 if (cbp & (1 << 11)) {
1016 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1019 s->block_last_index[i] = -1;
1025 if (s->flags2 & CODEC_FLAG2_FAST) {
1026 for (i = 0; i < 6; i++) {
1028 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1030 s->block_last_index[i] = -1;
1035 for (i = 0; i < 6; i++) {
1037 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1040 s->block_last_index[i] = -1;
1047 for (i = 0; i < 12; i++)
1048 s->block_last_index[i] = -1;
1052 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1057 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1059 Mpeg1Context *s = avctx->priv_data;
1060 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1063 /* we need some permutation to store matrices,
1064 * until MPV_common_init() sets the real permutation. */
1065 for (i = 0; i < 64; i++)
1066 s2->dsp.idct_permutation[i]=i;
1068 ff_MPV_decode_defaults(s2);
1070 s->mpeg_enc_ctx.avctx = avctx;
1071 s->mpeg_enc_ctx.flags = avctx->flags;
1072 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1073 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1074 ff_mpeg12_init_vlcs();
1076 s->mpeg_enc_ctx_allocated = 0;
1077 s->mpeg_enc_ctx.picture_number = 0;
1078 s->repeat_field = 0;
1079 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1080 avctx->color_range = AVCOL_RANGE_MPEG;
1081 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1082 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1084 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1088 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1090 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1091 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1094 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1097 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1098 if (err) return err;
1100 if (!ctx->mpeg_enc_ctx_allocated)
1101 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1103 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1104 s->picture_number++;
1109 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1110 const uint8_t *new_perm)
1112 uint16_t temp_matrix[64];
1115 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1117 for (i = 0; i < 64; i++) {
1118 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1122 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1123 #if CONFIG_MPEG1_XVMC_HWACCEL
1126 #if CONFIG_MPEG1_VDPAU_HWACCEL
1127 AV_PIX_FMT_VDPAU_MPEG1,
1134 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1135 #if CONFIG_MPEG2_XVMC_HWACCEL
1138 #if CONFIG_MPEG2_VDPAU_HWACCEL
1139 AV_PIX_FMT_VDPAU_MPEG2,
1142 #if CONFIG_MPEG2_DXVA2_HWACCEL
1143 AV_PIX_FMT_DXVA2_VLD,
1145 #if CONFIG_MPEG2_VAAPI_HWACCEL
1146 AV_PIX_FMT_VAAPI_VLD,
1152 static inline int uses_vdpau(AVCodecContext *avctx) {
1153 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1156 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1158 Mpeg1Context *s1 = avctx->priv_data;
1159 MpegEncContext *s = &s1->mpeg_enc_ctx;
1161 if(s->chroma_format < 2) {
1162 return ff_thread_get_format(avctx,
1163 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1164 mpeg1_hwaccel_pixfmt_list_420 :
1165 mpeg2_hwaccel_pixfmt_list_420);
1166 } else if(s->chroma_format == 2)
1167 return AV_PIX_FMT_YUV422P;
1169 return AV_PIX_FMT_YUV444P;
1172 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1174 avctx->hwaccel = ff_find_hwaccel(avctx);
1175 // until then pix_fmt may be changed right after codec init
1176 if (avctx->hwaccel || uses_vdpau(avctx))
1177 if (avctx->idct_algo == FF_IDCT_AUTO)
1178 avctx->idct_algo = FF_IDCT_SIMPLE;
1180 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1181 Mpeg1Context *s1 = avctx->priv_data;
1182 MpegEncContext *s = &s1->mpeg_enc_ctx;
1184 s->pack_pblocks = 1;
1186 avctx->xvmc_acceleration = 2;
1187 #endif /* FF_API_XVMC */
1191 /* Call this function when we know all parameters.
1192 * It may be called in different places for MPEG-1 and MPEG-2. */
1193 static int mpeg_decode_postinit(AVCodecContext *avctx)
1195 Mpeg1Context *s1 = avctx->priv_data;
1196 MpegEncContext *s = &s1->mpeg_enc_ctx;
1197 uint8_t old_permutation[64];
1200 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1201 avctx->coded_width != s->width ||
1202 avctx->coded_height != s->height ||
1203 s1->save_width != s->width ||
1204 s1->save_height != s->height ||
1205 s1->save_aspect_info != s->aspect_ratio_info ||
1206 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1210 if (s1->mpeg_enc_ctx_allocated) {
1211 ParseContext pc = s->parse_context;
1212 s->parse_context.buffer = 0;
1213 ff_MPV_common_end(s);
1214 s->parse_context = pc;
1215 s1->mpeg_enc_ctx_allocated = 0;
1218 if ((s->width == 0) || (s->height == 0))
1221 ret = ff_set_dimensions(avctx, s->width, s->height);
1225 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1226 avctx->rc_max_rate = s->bit_rate;
1227 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1228 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1229 avctx->bit_rate = s->bit_rate;
1231 s1->save_aspect_info = s->aspect_ratio_info;
1232 s1->save_width = s->width;
1233 s1->save_height = s->height;
1234 s1->save_progressive_seq = s->progressive_sequence;
1236 /* low_delay may be forced, in this case we will have B-frames
1237 * that behave like P-frames. */
1238 avctx->has_b_frames = !s->low_delay;
1240 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1242 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1243 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1245 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1246 avctx->ticks_per_frame=1;
1249 av_reduce(&s->avctx->time_base.den,
1250 &s->avctx->time_base.num,
1251 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1252 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1254 avctx->ticks_per_frame = 2;
1256 if (s->aspect_ratio_info > 1) {
1258 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1259 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1260 (AVRational) {s->width, s->height});
1262 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1263 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1264 // issue1613, 621, 562
1265 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1266 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1267 s->avctx->sample_aspect_ratio =
1268 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1269 (AVRational) {s->width, s->height});
1271 s->avctx->sample_aspect_ratio =
1272 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1273 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1274 //issue1613 4/3 16/9 -> 16/9
1275 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1276 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1277 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1278 av_dlog(avctx, "A %d/%d\n",
1279 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1280 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1281 s->avctx->sample_aspect_ratio.den);
1284 s->avctx->sample_aspect_ratio =
1285 ff_mpeg2_aspect[s->aspect_ratio_info];
1289 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1290 setup_hwaccel_for_pixfmt(avctx);
1292 /* Quantization matrices may need reordering
1293 * if DCT permutation is changed. */
1294 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1296 if (ff_MPV_common_init(s) < 0)
1299 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1300 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1301 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1302 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1304 s1->mpeg_enc_ctx_allocated = 1;
1309 static int mpeg1_decode_picture(AVCodecContext *avctx,
1310 const uint8_t *buf, int buf_size)
1312 Mpeg1Context *s1 = avctx->priv_data;
1313 MpegEncContext *s = &s1->mpeg_enc_ctx;
1314 int ref, f_code, vbv_delay;
1316 init_get_bits(&s->gb, buf, buf_size*8);
1318 ref = get_bits(&s->gb, 10); /* temporal ref */
1319 s->pict_type = get_bits(&s->gb, 3);
1320 if (s->pict_type == 0 || s->pict_type > 3)
1323 vbv_delay = get_bits(&s->gb, 16);
1324 s->vbv_delay = vbv_delay;
1325 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1326 s->full_pel[0] = get_bits1(&s->gb);
1327 f_code = get_bits(&s->gb, 3);
1328 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1331 s->mpeg_f_code[0][0] = f_code;
1332 s->mpeg_f_code[0][1] = f_code;
1334 if (s->pict_type == AV_PICTURE_TYPE_B) {
1335 s->full_pel[1] = get_bits1(&s->gb);
1336 f_code = get_bits(&s->gb, 3);
1337 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1340 s->mpeg_f_code[1][0] = f_code;
1341 s->mpeg_f_code[1][1] = f_code;
1343 s->current_picture.f.pict_type = s->pict_type;
1344 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1346 if (avctx->debug & FF_DEBUG_PICT_INFO)
1347 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1354 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1356 MpegEncContext *s= &s1->mpeg_enc_ctx;
1357 int horiz_size_ext, vert_size_ext;
1360 skip_bits(&s->gb, 1); /* profile and level esc*/
1361 s->avctx->profile = get_bits(&s->gb, 3);
1362 s->avctx->level = get_bits(&s->gb, 4);
1363 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1364 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1365 horiz_size_ext = get_bits(&s->gb, 2);
1366 vert_size_ext = get_bits(&s->gb, 2);
1367 s->width |= (horiz_size_ext << 12);
1368 s->height |= (vert_size_ext << 12);
1369 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1370 s->bit_rate += (bit_rate_ext << 18) * 400;
1371 skip_bits1(&s->gb); /* marker */
1372 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1374 s->low_delay = get_bits1(&s->gb);
1375 if (s->flags & CODEC_FLAG_LOW_DELAY)
1378 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1379 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1381 av_dlog(s->avctx, "sequence extension\n");
1382 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1384 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1385 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1386 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1390 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1392 MpegEncContext *s = &s1->mpeg_enc_ctx;
1393 int color_description, w, h;
1395 skip_bits(&s->gb, 3); /* video format */
1396 color_description = get_bits1(&s->gb);
1397 if (color_description) {
1398 s->avctx->color_primaries = get_bits(&s->gb, 8);
1399 s->avctx->color_trc = get_bits(&s->gb, 8);
1400 s->avctx->colorspace = get_bits(&s->gb, 8);
1402 w = get_bits(&s->gb, 14);
1403 skip_bits(&s->gb, 1); //marker
1404 h = get_bits(&s->gb, 14);
1405 // remaining 3 bits are zero padding
1407 s1->pan_scan.width = 16 * w;
1408 s1->pan_scan.height = 16 * h;
1410 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1411 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1414 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1416 MpegEncContext *s = &s1->mpeg_enc_ctx;
1420 if (s->progressive_sequence) {
1421 if (s->repeat_first_field) {
1423 if (s->top_field_first)
1427 if (s->picture_structure == PICT_FRAME) {
1429 if (s->repeat_first_field)
1433 for (i = 0; i < nofco; i++) {
1434 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1435 skip_bits(&s->gb, 1); // marker
1436 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1437 skip_bits(&s->gb, 1); // marker
1440 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1441 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1442 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1443 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1444 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1447 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1451 for (i = 0; i < 64; i++) {
1452 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1453 int v = get_bits(&s->gb, 8);
1455 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1458 if (intra && i == 0 && v != 8) {
1459 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1460 v = 8; // needed by pink.mpg / issue1046
1469 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1471 av_dlog(s->avctx, "matrix extension\n");
1473 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1474 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1475 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1476 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1479 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1481 MpegEncContext *s = &s1->mpeg_enc_ctx;
1483 s->full_pel[0] = s->full_pel[1] = 0;
1484 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1485 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1486 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1487 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1488 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1489 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1490 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1491 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1492 s->pict_type = AV_PICTURE_TYPE_I;
1494 s->pict_type = AV_PICTURE_TYPE_P;
1496 s->pict_type = AV_PICTURE_TYPE_B;
1497 s->current_picture.f.pict_type = s->pict_type;
1498 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1500 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1501 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1502 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1503 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1505 s->intra_dc_precision = get_bits(&s->gb, 2);
1506 s->picture_structure = get_bits(&s->gb, 2);
1507 s->top_field_first = get_bits1(&s->gb);
1508 s->frame_pred_frame_dct = get_bits1(&s->gb);
1509 s->concealment_motion_vectors = get_bits1(&s->gb);
1510 s->q_scale_type = get_bits1(&s->gb);
1511 s->intra_vlc_format = get_bits1(&s->gb);
1512 s->alternate_scan = get_bits1(&s->gb);
1513 s->repeat_first_field = get_bits1(&s->gb);
1514 s->chroma_420_type = get_bits1(&s->gb);
1515 s->progressive_frame = get_bits1(&s->gb);
1518 if (s->alternate_scan) {
1519 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1520 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1522 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1523 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1526 /* composite display not parsed */
1527 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1528 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1529 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1530 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1531 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1532 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1533 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1534 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1535 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1538 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1540 AVCodecContext *avctx = s->avctx;
1541 Mpeg1Context *s1 = (Mpeg1Context*)s;
1543 /* start frame decoding */
1544 if (s->first_field || s->picture_structure == PICT_FRAME) {
1545 AVFrameSideData *pan_scan;
1547 if (ff_MPV_frame_start(s, avctx) < 0)
1550 ff_mpeg_er_frame_start(s);
1552 /* first check if we must repeat the frame */
1553 s->current_picture_ptr->f.repeat_pict = 0;
1554 if (s->repeat_first_field) {
1555 if (s->progressive_sequence) {
1556 if (s->top_field_first)
1557 s->current_picture_ptr->f.repeat_pict = 4;
1559 s->current_picture_ptr->f.repeat_pict = 2;
1560 } else if (s->progressive_frame) {
1561 s->current_picture_ptr->f.repeat_pict = 1;
1565 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1566 AV_FRAME_DATA_PANSCAN,
1567 sizeof(s1->pan_scan));
1569 return AVERROR(ENOMEM);
1570 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1572 if (s1->a53_caption) {
1573 AVFrameSideData *sd = av_frame_new_side_data(
1574 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1575 s1->a53_caption_size);
1577 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1578 av_freep(&s1->a53_caption);
1580 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1581 ff_thread_finish_setup(avctx);
1582 } else { // second field
1585 if (!s->current_picture_ptr) {
1586 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1590 if (s->avctx->hwaccel &&
1591 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1592 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1593 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1596 for (i = 0; i < 4; i++) {
1597 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1598 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1599 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1604 if (avctx->hwaccel) {
1605 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1612 #define DECODE_SLICE_ERROR -1
1613 #define DECODE_SLICE_OK 0
1617 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1618 * @return DECODE_SLICE_ERROR if the slice is damaged,
1619 * DECODE_SLICE_OK if this slice is OK
1621 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1622 const uint8_t **buf, int buf_size)
1624 AVCodecContext *avctx = s->avctx;
1625 const int lowres = s->avctx->lowres;
1626 const int field_pic = s->picture_structure != PICT_FRAME;
1629 s->resync_mb_y = -1;
1631 av_assert0(mb_y < s->mb_height);
1633 init_get_bits(&s->gb, *buf, buf_size * 8);
1634 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1635 skip_bits(&s->gb, 3);
1637 ff_mpeg1_clean_buffers(s);
1638 s->interlaced_dct = 0;
1640 s->qscale = get_qscale(s);
1642 if (s->qscale == 0) {
1643 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1647 /* extra slice info */
1648 if (skip_1stop_8data_bits(&s->gb) < 0)
1649 return AVERROR_INVALIDDATA;
1653 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1656 while (get_bits_left(&s->gb) > 0) {
1657 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1658 MBINCR_VLC_BITS, 2);
1660 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1667 /* otherwise, stuffing, nothing to do */
1675 if (s->mb_x >= (unsigned)s->mb_width) {
1676 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1680 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1681 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1682 int start_code = -1;
1683 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1684 if (buf_end < *buf + buf_size)
1687 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1688 return DECODE_SLICE_ERROR;
1690 return DECODE_SLICE_OK;
1693 s->resync_mb_x = s->mb_x;
1694 s->resync_mb_y = s->mb_y = mb_y;
1696 ff_init_block_index(s);
1698 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1699 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1700 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",
1701 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],
1702 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")),
1703 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1704 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1705 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1710 // If 1, we memcpy blocks in xvmcvideo.
1711 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1712 ff_xvmc_init_block(s); // set s->block
1714 if (mpeg_decode_mb(s, s->block) < 0)
1717 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1718 const int wrap = s->b8_stride;
1719 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1720 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1721 int motion_x, motion_y, dir, i;
1723 for (i = 0; i < 2; i++) {
1724 for (dir = 0; dir < 2; dir++) {
1725 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1726 motion_x = motion_y = 0;
1727 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1728 motion_x = s->mv[dir][0][0];
1729 motion_y = s->mv[dir][0][1];
1730 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1731 motion_x = s->mv[dir][i][0];
1732 motion_y = s->mv[dir][i][1];
1735 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1736 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1737 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1738 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1739 s->current_picture.ref_index [dir][b8_xy ] =
1740 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1741 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1748 s->dest[0] += 16 >> lowres;
1749 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1750 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1752 ff_MPV_decode_mb(s, s->block);
1754 if (++s->mb_x >= s->mb_width) {
1755 const int mb_size = 16 >> s->avctx->lowres;
1757 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1758 ff_MPV_report_decode_progress(s);
1761 s->mb_y += 1 << field_pic;
1763 if (s->mb_y >= s->mb_height) {
1764 int left = get_bits_left(&s->gb);
1765 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1766 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1767 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1769 if (left >= 32 && !is_d10) {
1770 GetBitContext gb = s->gb;
1771 align_get_bits(&gb);
1772 if (show_bits(&gb, 24) == 0x060E2B) {
1773 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1778 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1779 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1780 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1786 ff_init_block_index(s);
1789 /* skip mb handling */
1790 if (s->mb_skip_run == -1) {
1791 /* read increment again */
1794 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1795 MBINCR_VLC_BITS, 2);
1797 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1802 s->mb_skip_run += 33;
1803 } else if (code == 35) {
1804 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1805 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1808 goto eos; /* end of slice */
1810 /* otherwise, stuffing, nothing to do */
1812 s->mb_skip_run += code;
1816 if (s->mb_skip_run) {
1818 if (s->pict_type == AV_PICTURE_TYPE_I) {
1819 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1825 for (i = 0; i < 12; i++)
1826 s->block_last_index[i] = -1;
1827 if (s->picture_structure == PICT_FRAME)
1828 s->mv_type = MV_TYPE_16X16;
1830 s->mv_type = MV_TYPE_FIELD;
1831 if (s->pict_type == AV_PICTURE_TYPE_P) {
1832 /* if P type, zero motion vector is implied */
1833 s->mv_dir = MV_DIR_FORWARD;
1834 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1835 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1836 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1837 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1839 /* if B type, reuse previous vectors and directions */
1840 s->mv[0][0][0] = s->last_mv[0][0][0];
1841 s->mv[0][0][1] = s->last_mv[0][0][1];
1842 s->mv[1][0][0] = s->last_mv[1][0][0];
1843 s->mv[1][0][1] = s->last_mv[1][0][1];
1848 eos: // end of slice
1849 if (get_bits_left(&s->gb) < 0)
1850 return AVERROR_INVALIDDATA;
1851 *buf += (get_bits_count(&s->gb)-1)/8;
1852 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1856 static int slice_decode_thread(AVCodecContext *c, void *arg)
1858 MpegEncContext *s = *(void**)arg;
1859 const uint8_t *buf = s->gb.buffer;
1860 int mb_y = s->start_mb_y;
1861 const int field_pic = s->picture_structure != PICT_FRAME;
1863 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1866 uint32_t start_code;
1869 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1871 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1872 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1873 s->start_mb_y, s->end_mb_y, s->er.error_count);
1875 if (c->err_recognition & AV_EF_EXPLODE)
1877 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1878 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);
1880 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);
1883 if (s->mb_y == s->end_mb_y)
1887 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1888 mb_y= start_code - SLICE_MIN_START_CODE;
1889 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1890 mb_y += (*buf&0xE0)<<2;
1892 if (s->picture_structure == PICT_BOTTOM_FIELD)
1894 if (mb_y < 0 || mb_y >= s->end_mb_y)
1900 * Handle slice ends.
1901 * @return 1 if it seems to be the last slice
1903 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1905 Mpeg1Context *s1 = avctx->priv_data;
1906 MpegEncContext *s = &s1->mpeg_enc_ctx;
1908 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1911 if (s->avctx->hwaccel) {
1912 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1913 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1916 /* end of slice reached */
1917 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1920 ff_er_frame_end(&s->er);
1922 ff_MPV_frame_end(s);
1924 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1925 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1928 ff_print_debug_info(s, s->current_picture_ptr, pict);
1929 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1931 if (avctx->active_thread_type & FF_THREAD_FRAME)
1932 s->picture_number++;
1933 /* latency of 1 frame for I- and P-frames */
1934 /* XXX: use another variable than picture_number */
1935 if (s->last_picture_ptr != NULL) {
1936 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1939 ff_print_debug_info(s, s->last_picture_ptr, pict);
1940 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1950 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1951 const uint8_t *buf, int buf_size)
1953 Mpeg1Context *s1 = avctx->priv_data;
1954 MpegEncContext *s = &s1->mpeg_enc_ctx;
1958 init_get_bits(&s->gb, buf, buf_size*8);
1960 width = get_bits(&s->gb, 12);
1961 height = get_bits(&s->gb, 12);
1962 if (width == 0 || height == 0) {
1963 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1965 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1966 return AVERROR_INVALIDDATA;
1968 s->aspect_ratio_info = get_bits(&s->gb, 4);
1969 if (s->aspect_ratio_info == 0) {
1970 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1971 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1974 s->frame_rate_index = get_bits(&s->gb, 4);
1975 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1977 s->bit_rate = get_bits(&s->gb, 18) * 400;
1978 if (get_bits1(&s->gb) == 0) /* marker */
1983 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1984 skip_bits(&s->gb, 1);
1987 if (get_bits1(&s->gb)) {
1988 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1990 for (i = 0; i < 64; i++) {
1991 j = s->dsp.idct_permutation[i];
1992 v = ff_mpeg1_default_intra_matrix[i];
1993 s->intra_matrix[j] = v;
1994 s->chroma_intra_matrix[j] = v;
1997 if (get_bits1(&s->gb)) {
1998 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2000 for (i = 0; i < 64; i++) {
2001 int j = s->dsp.idct_permutation[i];
2002 v = ff_mpeg1_default_non_intra_matrix[i];
2003 s->inter_matrix[j] = v;
2004 s->chroma_inter_matrix[j] = v;
2008 if (show_bits(&s->gb, 23) != 0) {
2009 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2013 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2014 s->progressive_sequence = 1;
2015 s->progressive_frame = 1;
2016 s->picture_structure = PICT_FRAME;
2018 s->frame_pred_frame_dct = 1;
2019 s->chroma_format = 1;
2020 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2021 s->out_format = FMT_MPEG1;
2022 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2023 if (s->flags & CODEC_FLAG_LOW_DELAY)
2026 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2027 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2028 s->avctx->rc_buffer_size, s->bit_rate);
2033 static int vcr2_init_sequence(AVCodecContext *avctx)
2035 Mpeg1Context *s1 = avctx->priv_data;
2036 MpegEncContext *s = &s1->mpeg_enc_ctx;
2039 /* start new MPEG-1 context decoding */
2040 s->out_format = FMT_MPEG1;
2041 if (s1->mpeg_enc_ctx_allocated) {
2042 ff_MPV_common_end(s);
2043 s1->mpeg_enc_ctx_allocated = 0;
2045 s->width = avctx->coded_width;
2046 s->height = avctx->coded_height;
2047 avctx->has_b_frames = 0; // true?
2050 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2051 setup_hwaccel_for_pixfmt(avctx);
2053 if (ff_MPV_common_init(s) < 0)
2055 s1->mpeg_enc_ctx_allocated = 1;
2057 for (i = 0; i < 64; i++) {
2058 int j = s->dsp.idct_permutation[i];
2059 v = ff_mpeg1_default_intra_matrix[i];
2060 s->intra_matrix[j] = v;
2061 s->chroma_intra_matrix[j] = v;
2063 v = ff_mpeg1_default_non_intra_matrix[i];
2064 s->inter_matrix[j] = v;
2065 s->chroma_inter_matrix[j] = v;
2068 s->progressive_sequence = 1;
2069 s->progressive_frame = 1;
2070 s->picture_structure = PICT_FRAME;
2072 s->frame_pred_frame_dct = 1;
2073 s->chroma_format = 1;
2074 if (s->codec_tag == AV_RL32("BW10")) {
2075 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2077 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2078 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2080 s1->save_width = s->width;
2081 s1->save_height = s->height;
2082 s1->save_progressive_seq = s->progressive_sequence;
2087 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2088 const uint8_t *p, int buf_size)
2090 Mpeg1Context *s1 = avctx->priv_data;
2092 if (buf_size >= 6 &&
2093 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2094 p[4] == 3 && (p[5] & 0x40)) {
2095 /* extract A53 Part 4 CC data */
2096 int cc_count = p[5] & 0x1f;
2097 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2098 av_freep(&s1->a53_caption);
2099 s1->a53_caption_size = cc_count * 3;
2100 s1->a53_caption = av_malloc(s1->a53_caption_size);
2101 if (s1->a53_caption) {
2102 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2106 } else if (buf_size >= 11 &&
2107 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2108 /* extract DVD CC data */
2111 // There is a caption count field in the data, but it is often
2112 // incorect. So count the number of captions present.
2113 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2115 // Transform the DVD format into A53 Part 4 format
2117 av_freep(&s1->a53_caption);
2118 s1->a53_caption_size = cc_count * 6;
2119 s1->a53_caption = av_malloc(s1->a53_caption_size);
2120 if (s1->a53_caption) {
2121 uint8_t field1 = !!(p[4] & 0x80);
2122 uint8_t *cap = s1->a53_caption;
2124 for (i = 0; i < cc_count; i++) {
2125 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2128 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2141 static void mpeg_decode_user_data(AVCodecContext *avctx,
2142 const uint8_t *p, int buf_size)
2144 Mpeg1Context *s = avctx->priv_data;
2145 const uint8_t *buf_end = p + buf_size;
2150 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2154 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2155 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2157 av_log(avctx, AV_LOG_ERROR, "\n");*/
2160 /* we parse the DTG active format information */
2161 if (buf_end - p >= 5 &&
2162 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2170 if (buf_end - p < 1)
2172 avctx->dtg_active_format = p[0] & 0x0f;
2174 } else if (buf_end - p >= 6 &&
2175 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2176 p[4] == 0x03) { // S3D_video_format_length
2177 // the 0x7F mask ignores the reserved_bit value
2178 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2180 if (S3D_video_format_type == 0x03 ||
2181 S3D_video_format_type == 0x04 ||
2182 S3D_video_format_type == 0x08 ||
2183 S3D_video_format_type == 0x23) {
2184 Mpeg1Context *s1 = avctx->priv_data;
2185 MpegEncContext *s = &s1->mpeg_enc_ctx;
2187 if (!s->current_picture_ptr)
2190 stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2194 switch (S3D_video_format_type) {
2196 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2199 stereo->type = AV_STEREO3D_TOPBOTTOM;
2202 stereo->type = AV_STEREO3D_2D;
2205 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2209 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2214 static void mpeg_decode_gop(AVCodecContext *avctx,
2215 const uint8_t *buf, int buf_size)
2217 Mpeg1Context *s1 = avctx->priv_data;
2218 MpegEncContext *s = &s1->mpeg_enc_ctx;
2222 init_get_bits(&s->gb, buf, buf_size*8);
2224 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2226 s->closed_gop = get_bits1(&s->gb);
2227 /*broken_link indicate that after editing the
2228 reference frames of the first B-Frames after GOP I-Frame
2229 are missing (open gop)*/
2230 broken_link = get_bits1(&s->gb);
2232 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2233 char tcbuf[AV_TIMECODE_STR_SIZE];
2234 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2235 av_log(s->avctx, AV_LOG_DEBUG,
2236 "GOP (%s) closed_gop=%d broken_link=%d\n",
2237 tcbuf, s->closed_gop, broken_link);
2241 static int decode_chunks(AVCodecContext *avctx,
2242 AVFrame *picture, int *got_output,
2243 const uint8_t *buf, int buf_size)
2245 Mpeg1Context *s = avctx->priv_data;
2246 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2247 const uint8_t *buf_ptr = buf;
2248 const uint8_t *buf_end = buf + buf_size;
2249 int ret, input_size;
2250 int last_code = 0, skip_frame = 0;
2251 int picture_start_code_seen = 0;
2254 /* find next start code */
2255 uint32_t start_code = -1;
2256 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2257 if (start_code > 0x1ff) {
2259 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2262 av_assert0(avctx->thread_count > 1);
2264 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, 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 ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2270 && uses_vdpau(avctx))
2271 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2273 ret = slice_end(avctx, picture);
2277 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2283 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2284 return AVERROR_INVALIDDATA;
2286 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2289 input_size = buf_end - buf_ptr;
2291 if (avctx->debug & FF_DEBUG_STARTCODE) {
2292 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2295 /* prepare data for next start code */
2296 switch (start_code) {
2297 case SEQ_START_CODE:
2298 if (last_code == 0) {
2299 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2300 if(buf != avctx->extradata)
2303 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2304 if (avctx->err_recognition & AV_EF_EXPLODE)
2305 return AVERROR_INVALIDDATA;
2309 case PICTURE_START_CODE:
2310 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2311 /* If it's a frame picture, there can't be more than one picture header.
2312 Yet, it does happen and we need to handle it. */
2313 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2316 picture_start_code_seen = 1;
2318 if (s2->width <= 0 || s2->height <= 0) {
2319 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2320 s2->width, s2->height);
2321 return AVERROR_INVALIDDATA;
2325 s2->intra_dc_precision= 3;
2326 s2->intra_matrix[0]= 1;
2328 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2329 !avctx->hwaccel && s->slice_count) {
2332 avctx->execute(avctx, slice_decode_thread,
2333 s2->thread_context, NULL,
2334 s->slice_count, sizeof(void*));
2335 for (i = 0; i < s->slice_count; i++)
2336 s2->er.error_count += s2->thread_context[i]->er.error_count;
2339 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2340 ret = mpeg_decode_postinit(avctx);
2342 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2346 /* we have a complete image: we try to decompress it */
2347 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2350 last_code = PICTURE_START_CODE;
2352 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2353 if (avctx->err_recognition & AV_EF_EXPLODE)
2354 return AVERROR_INVALIDDATA;
2357 case EXT_START_CODE:
2358 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2360 switch (get_bits(&s2->gb, 4)) {
2362 if (last_code == 0) {
2363 mpeg_decode_sequence_extension(s);
2365 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2366 if (avctx->err_recognition & AV_EF_EXPLODE)
2367 return AVERROR_INVALIDDATA;
2371 mpeg_decode_sequence_display_extension(s);
2374 mpeg_decode_quant_matrix_extension(s2);
2377 mpeg_decode_picture_display_extension(s);
2380 if (last_code == PICTURE_START_CODE) {
2381 mpeg_decode_picture_coding_extension(s);
2383 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2384 if (avctx->err_recognition & AV_EF_EXPLODE)
2385 return AVERROR_INVALIDDATA;
2390 case USER_START_CODE:
2391 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2393 case GOP_START_CODE:
2394 if (last_code == 0) {
2396 mpeg_decode_gop(avctx, buf_ptr, input_size);
2399 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2400 if (avctx->err_recognition & AV_EF_EXPLODE)
2401 return AVERROR_INVALIDDATA;
2405 if (start_code >= SLICE_MIN_START_CODE &&
2406 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2408 if (s2->progressive_sequence && !s2->progressive_frame) {
2409 s2->progressive_frame = 1;
2410 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2413 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2414 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2415 s2->picture_structure = PICT_FRAME;
2418 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2419 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2422 if (s2->picture_structure == PICT_FRAME) {
2423 s2->first_field = 0;
2424 s2->v_edge_pos = 16 * s2->mb_height;
2426 s2->first_field ^= 1;
2427 s2->v_edge_pos = 8 * s2->mb_height;
2428 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2431 if (start_code >= SLICE_MIN_START_CODE &&
2432 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2433 const int field_pic = s2->picture_structure != PICT_FRAME;
2434 int mb_y = start_code - SLICE_MIN_START_CODE;
2435 last_code = SLICE_MIN_START_CODE;
2436 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2437 mb_y += (*buf_ptr&0xE0)<<2;
2440 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2443 if (buf_end - buf_ptr < 2) {
2444 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2445 return AVERROR_INVALIDDATA;
2448 if (mb_y >= s2->mb_height) {
2449 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2453 if (s2->last_picture_ptr == NULL) {
2454 /* Skip B-frames if we do not have reference frames and gop is not closed */
2455 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2456 if (!s2->closed_gop) {
2462 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2464 if (s2->next_picture_ptr == NULL) {
2465 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2466 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2471 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2472 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2473 avctx->skip_frame >= AVDISCARD_ALL) {
2478 if (!s->mpeg_enc_ctx_allocated)
2481 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2482 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2486 if (!s2->pict_type) {
2487 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2488 if (avctx->err_recognition & AV_EF_EXPLODE)
2489 return AVERROR_INVALIDDATA;
2493 if (s->first_slice) {
2496 if (mpeg_field_start(s2, buf, buf_size) < 0)
2499 if (!s2->current_picture_ptr) {
2500 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2501 return AVERROR_INVALIDDATA;
2504 if (uses_vdpau(avctx)) {
2509 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2511 int threshold = (s2->mb_height * s->slice_count +
2512 s2->slice_context_count / 2) /
2513 s2->slice_context_count;
2514 av_assert0(avctx->thread_count > 1);
2515 if (threshold <= mb_y) {
2516 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2518 thread_context->start_mb_y = mb_y;
2519 thread_context->end_mb_y = s2->mb_height;
2520 if (s->slice_count) {
2521 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2522 ret = ff_update_duplicate_context(thread_context,
2527 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2530 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2532 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2536 if (avctx->err_recognition & AV_EF_EXPLODE)
2538 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2539 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);
2541 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);
2550 static int mpeg_decode_frame(AVCodecContext *avctx,
2551 void *data, int *got_output,
2554 const uint8_t *buf = avpkt->data;
2556 int buf_size = avpkt->size;
2557 Mpeg1Context *s = avctx->priv_data;
2558 AVFrame *picture = data;
2559 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2560 av_dlog(avctx, "fill_buffer\n");
2562 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2563 /* special case for last picture */
2564 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2565 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2569 s2->next_picture_ptr = NULL;
2576 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2577 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2579 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2583 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2584 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2585 || s2->codec_tag == AV_RL32("BW10")
2587 vcr2_init_sequence(avctx);
2591 if (avctx->extradata && !s->extradata_decoded) {
2592 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2594 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2597 s->extradata_decoded = 1;
2598 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2599 s2->current_picture_ptr = NULL;
2604 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2605 if (ret<0 || *got_output)
2606 s2->current_picture_ptr = NULL;
2612 static void flush(AVCodecContext *avctx)
2614 Mpeg1Context *s = avctx->priv_data;
2618 ff_mpeg_flush(avctx);
2621 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2623 Mpeg1Context *s = avctx->priv_data;
2625 if (s->mpeg_enc_ctx_allocated)
2626 ff_MPV_common_end(&s->mpeg_enc_ctx);
2627 av_freep(&s->a53_caption);
2631 static const AVProfile mpeg2_video_profiles[] = {
2632 { FF_PROFILE_MPEG2_422, "4:2:2" },
2633 { FF_PROFILE_MPEG2_HIGH, "High" },
2634 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2635 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2636 { FF_PROFILE_MPEG2_MAIN, "Main" },
2637 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2638 { FF_PROFILE_RESERVED, "Reserved" },
2639 { FF_PROFILE_RESERVED, "Reserved" },
2640 { FF_PROFILE_UNKNOWN },
2644 AVCodec ff_mpeg1video_decoder = {
2645 .name = "mpeg1video",
2646 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2647 .type = AVMEDIA_TYPE_VIDEO,
2648 .id = AV_CODEC_ID_MPEG1VIDEO,
2649 .priv_data_size = sizeof(Mpeg1Context),
2650 .init = mpeg_decode_init,
2651 .close = mpeg_decode_end,
2652 .decode = mpeg_decode_frame,
2653 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2654 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2655 CODEC_CAP_SLICE_THREADS,
2658 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2661 AVCodec ff_mpeg2video_decoder = {
2662 .name = "mpeg2video",
2663 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2664 .type = AVMEDIA_TYPE_VIDEO,
2665 .id = AV_CODEC_ID_MPEG2VIDEO,
2666 .priv_data_size = sizeof(Mpeg1Context),
2667 .init = mpeg_decode_init,
2668 .close = mpeg_decode_end,
2669 .decode = mpeg_decode_frame,
2670 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2671 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2672 CODEC_CAP_SLICE_THREADS,
2675 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2679 AVCodec ff_mpegvideo_decoder = {
2680 .name = "mpegvideo",
2681 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2682 .type = AVMEDIA_TYPE_VIDEO,
2683 .id = AV_CODEC_ID_MPEG2VIDEO,
2684 .priv_data_size = sizeof(Mpeg1Context),
2685 .init = mpeg_decode_init,
2686 .close = mpeg_decode_end,
2687 .decode = mpeg_decode_frame,
2688 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2694 #if CONFIG_MPEG_XVMC_DECODER
2695 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2697 if (avctx->active_thread_type & FF_THREAD_SLICE)
2699 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2701 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2702 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2704 mpeg_decode_init(avctx);
2706 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2707 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2712 AVCodec ff_mpeg_xvmc_decoder = {
2713 .name = "mpegvideo_xvmc",
2714 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2715 .type = AVMEDIA_TYPE_VIDEO,
2716 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2717 .priv_data_size = sizeof(Mpeg1Context),
2718 .init = mpeg_mc_decode_init,
2719 .close = mpeg_decode_end,
2720 .decode = mpeg_decode_frame,
2721 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2722 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2727 #endif /* FF_API_XVMC */
2729 #if CONFIG_MPEG_VDPAU_DECODER
2730 AVCodec ff_mpeg_vdpau_decoder = {
2731 .name = "mpegvideo_vdpau",
2732 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2733 .type = AVMEDIA_TYPE_VIDEO,
2734 .id = AV_CODEC_ID_MPEG2VIDEO,
2735 .priv_data_size = sizeof(Mpeg1Context),
2736 .init = mpeg_decode_init,
2737 .close = mpeg_decode_end,
2738 .decode = mpeg_decode_frame,
2739 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2740 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2745 #if CONFIG_MPEG1_VDPAU_DECODER
2746 AVCodec ff_mpeg1_vdpau_decoder = {
2747 .name = "mpeg1video_vdpau",
2748 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2749 .type = AVMEDIA_TYPE_VIDEO,
2750 .id = AV_CODEC_ID_MPEG1VIDEO,
2751 .priv_data_size = sizeof(Mpeg1Context),
2752 .init = mpeg_decode_init,
2753 .close = mpeg_decode_end,
2754 .decode = mpeg_decode_frame,
2755 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2756 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,