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 #define UNCHECKED_BITSTREAM_READER 1
29 #include "libavutil/attributes.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/stereo3d.h"
35 #include "mpegvideo.h"
36 #include "error_resilience.h"
38 #include "mpeg12data.h"
39 #include "bytestream.h"
40 #include "vdpau_internal.h"
41 #include "xvmc_internal.h"
45 typedef struct Mpeg1Context {
46 MpegEncContext mpeg_enc_ctx;
47 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
48 int repeat_field; /* true if we must repeat the field */
49 AVPanScan pan_scan; /**< some temporary storage for the panscan */
54 int save_width, save_height, save_progressive_seq;
55 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
56 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
59 int extradata_decoded;
62 #define MB_TYPE_ZERO_MV 0x20000000
64 static const uint32_t ptype2mb_type[7] = {
66 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
68 MB_TYPE_L0 | MB_TYPE_CBP,
69 MB_TYPE_QUANT | MB_TYPE_INTRA,
70 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
71 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
74 static const uint32_t btype2mb_type[11] = {
77 MB_TYPE_L1 | MB_TYPE_CBP,
79 MB_TYPE_L0 | MB_TYPE_CBP,
81 MB_TYPE_L0L1 | MB_TYPE_CBP,
82 MB_TYPE_QUANT | MB_TYPE_INTRA,
83 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
84 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
85 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
88 static const uint8_t non_linear_qscale[32] = {
89 0, 1, 2, 3, 4, 5, 6, 7,
90 8,10,12,14,16,18,20,22,
91 24,28,32,36,40,44,48,52,
92 56,64,72,80,88,96,104,112,
95 /* as H.263, but only 17 codes */
96 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
98 int code, sign, val, shift;
100 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
108 sign = get_bits1(&s->gb);
112 val = (val - 1) << shift;
113 val |= get_bits(&s->gb, shift);
120 /* modulo decoding */
121 return sign_extend(val, 5 + shift);
124 #define check_scantable_index(ctx, x) \
127 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
128 ctx->mb_x, ctx->mb_y); \
129 return AVERROR_INVALIDDATA; \
133 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
135 int level, dc, diff, i, j, run;
137 RLTable *rl = &ff_rl_mpeg1;
138 uint8_t * const scantable = s->intra_scantable.permutated;
139 const uint16_t *quant_matrix = s->intra_matrix;
140 const int qscale = s->qscale;
143 component = (n <= 3 ? 0 : n - 4 + 1);
144 diff = decode_dc(&s->gb, component);
147 dc = s->last_dc[component];
149 s->last_dc[component] = dc;
150 block[0] = dc * quant_matrix[0];
151 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
154 OPEN_READER(re, &s->gb);
155 UPDATE_CACHE(re, &s->gb);
156 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
159 /* now quantify & encode AC coefficients */
161 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
165 check_scantable_index(s, i);
167 level = (level * qscale * quant_matrix[j]) >> 4;
168 level = (level - 1) | 1;
169 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
170 SKIP_BITS(re, &s->gb, 1);
173 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
174 UPDATE_CACHE(re, &s->gb);
175 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
177 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
178 } else if (level == 0) {
179 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
182 check_scantable_index(s, i);
186 level = (level * qscale * quant_matrix[j]) >> 4;
187 level = (level - 1) | 1;
190 level = (level * qscale * quant_matrix[j]) >> 4;
191 level = (level - 1) | 1;
196 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
199 UPDATE_CACHE(re, &s->gb);
202 LAST_SKIP_BITS(re, &s->gb, 2);
203 CLOSE_READER(re, &s->gb);
205 s->block_last_index[n] = i;
209 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
211 return mpeg1_decode_block_intra(s, block, n);
214 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
216 int level, i, j, run;
217 RLTable *rl = &ff_rl_mpeg1;
218 uint8_t * const scantable = s->intra_scantable.permutated;
219 const uint16_t *quant_matrix = s->inter_matrix;
220 const int qscale = s->qscale;
223 OPEN_READER(re, &s->gb);
225 // special case for first coefficient, no need to add second VLC table
226 UPDATE_CACHE(re, &s->gb);
227 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
228 level = (3 * qscale * quant_matrix[0]) >> 5;
229 level = (level - 1) | 1;
230 if (GET_CACHE(re, &s->gb) & 0x40000000)
234 SKIP_BITS(re, &s->gb, 2);
235 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
238 /* now quantify & encode AC coefficients */
240 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
244 check_scantable_index(s, i);
246 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
247 level = (level - 1) | 1;
248 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
249 SKIP_BITS(re, &s->gb, 1);
252 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
253 UPDATE_CACHE(re, &s->gb);
254 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
256 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
257 } else if (level == 0) {
258 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
261 check_scantable_index(s, i);
265 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
266 level = (level - 1) | 1;
269 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
270 level = (level - 1) | 1;
275 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
277 UPDATE_CACHE(re, &s->gb);
280 LAST_SKIP_BITS(re, &s->gb, 2);
281 CLOSE_READER(re, &s->gb);
283 s->block_last_index[n] = i;
288 * Note: this function can read out of range and crash for corrupt streams.
289 * Changing this would eat up any speed benefits it has.
290 * Do not use "fast" flag if you need the code to be robust.
292 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
294 int level, i, j, run;
295 RLTable *rl = &ff_rl_mpeg1;
296 uint8_t * const scantable = s->intra_scantable.permutated;
297 const int qscale = s->qscale;
300 OPEN_READER(re, &s->gb);
302 // special case for first coefficient, no need to add second VLC table
303 UPDATE_CACHE(re, &s->gb);
304 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
305 level = (3 * qscale) >> 1;
306 level = (level - 1) | 1;
307 if (GET_CACHE(re, &s->gb) & 0x40000000)
311 SKIP_BITS(re, &s->gb, 2);
312 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
316 /* now quantify & encode AC coefficients */
318 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
322 check_scantable_index(s, i);
324 level = ((level * 2 + 1) * qscale) >> 1;
325 level = (level - 1) | 1;
326 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
327 SKIP_BITS(re, &s->gb, 1);
330 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
331 UPDATE_CACHE(re, &s->gb);
332 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
334 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
335 } else if (level == 0) {
336 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
339 check_scantable_index(s, i);
343 level = ((level * 2 + 1) * qscale) >> 1;
344 level = (level - 1) | 1;
347 level = ((level * 2 + 1) * qscale) >> 1;
348 level = (level - 1) | 1;
353 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
355 UPDATE_CACHE(re, &s->gb);
358 LAST_SKIP_BITS(re, &s->gb, 2);
359 CLOSE_READER(re, &s->gb);
361 s->block_last_index[n] = i;
366 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
368 int level, i, j, run;
369 RLTable *rl = &ff_rl_mpeg1;
370 uint8_t * const scantable = s->intra_scantable.permutated;
371 const uint16_t *quant_matrix;
372 const int qscale = s->qscale;
378 OPEN_READER(re, &s->gb);
381 quant_matrix = s->inter_matrix;
383 quant_matrix = s->chroma_inter_matrix;
385 // special case for first coefficient, no need to add second VLC table
386 UPDATE_CACHE(re, &s->gb);
387 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
388 level= (3 * qscale * quant_matrix[0]) >> 5;
389 if (GET_CACHE(re, &s->gb) & 0x40000000)
394 SKIP_BITS(re, &s->gb, 2);
395 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
399 /* now quantify & encode AC coefficients */
401 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
405 check_scantable_index(s, i);
407 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
408 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
409 SKIP_BITS(re, &s->gb, 1);
412 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
413 UPDATE_CACHE(re, &s->gb);
414 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
417 check_scantable_index(s, i);
420 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
423 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
429 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
431 UPDATE_CACHE(re, &s->gb);
434 LAST_SKIP_BITS(re, &s->gb, 2);
435 CLOSE_READER(re, &s->gb);
437 block[63] ^= (mismatch & 1);
439 s->block_last_index[n] = i;
444 * Note: this function can read out of range and crash for corrupt streams.
445 * Changing this would eat up any speed benefits it has.
446 * Do not use "fast" flag if you need the code to be robust.
448 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
449 int16_t *block, int n)
451 int level, i, j, run;
452 RLTable *rl = &ff_rl_mpeg1;
453 uint8_t * const scantable = s->intra_scantable.permutated;
454 const int qscale = s->qscale;
455 OPEN_READER(re, &s->gb);
458 // special case for first coefficient, no need to add second VLC table
459 UPDATE_CACHE(re, &s->gb);
460 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
461 level = (3 * qscale) >> 1;
462 if (GET_CACHE(re, &s->gb) & 0x40000000)
466 SKIP_BITS(re, &s->gb, 2);
467 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
471 /* now quantify & encode AC coefficients */
473 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
478 level = ((level * 2 + 1) * qscale) >> 1;
479 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
480 SKIP_BITS(re, &s->gb, 1);
483 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
484 UPDATE_CACHE(re, &s->gb);
485 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
490 level = ((-level * 2 + 1) * qscale) >> 1;
493 level = ((level * 2 + 1) * qscale) >> 1;
498 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF || i > 63)
501 UPDATE_CACHE(re, &s->gb);
504 LAST_SKIP_BITS(re, &s->gb, 2);
505 CLOSE_READER(re, &s->gb);
506 s->block_last_index[n] = i;
511 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
513 int level, dc, diff, i, j, run;
516 uint8_t * const scantable = s->intra_scantable.permutated;
517 const uint16_t *quant_matrix;
518 const int qscale = s->qscale;
523 quant_matrix = s->intra_matrix;
526 quant_matrix = s->chroma_intra_matrix;
527 component = (n & 1) + 1;
529 diff = decode_dc(&s->gb, component);
532 dc = s->last_dc[component];
534 s->last_dc[component] = dc;
535 block[0] = dc << (3 - s->intra_dc_precision);
536 av_dlog(s->avctx, "dc=%d\n", block[0]);
537 mismatch = block[0] ^ 1;
539 if (s->intra_vlc_format)
545 OPEN_READER(re, &s->gb);
546 /* now quantify & encode AC coefficients */
548 UPDATE_CACHE(re, &s->gb);
549 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
553 } else if (level != 0) {
555 check_scantable_index(s, i);
557 level = (level * qscale * quant_matrix[j]) >> 4;
558 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
559 LAST_SKIP_BITS(re, &s->gb, 1);
562 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
563 UPDATE_CACHE(re, &s->gb);
564 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
566 check_scantable_index(s, i);
569 level = (-level * qscale * quant_matrix[j]) >> 4;
572 level = (level * qscale * quant_matrix[j]) >> 4;
579 CLOSE_READER(re, &s->gb);
581 block[63] ^= mismatch & 1;
583 s->block_last_index[n] = i;
588 * Note: this function can read out of range and crash for corrupt streams.
589 * Changing this would eat up any speed benefits it has.
590 * Do not use "fast" flag if you need the code to be robust.
592 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
594 int level, dc, diff, i, j, run;
597 uint8_t * const scantable = s->intra_scantable.permutated;
598 const uint16_t *quant_matrix;
599 const int qscale = s->qscale;
603 quant_matrix = s->intra_matrix;
606 quant_matrix = s->chroma_intra_matrix;
607 component = (n & 1) + 1;
609 diff = decode_dc(&s->gb, component);
612 dc = s->last_dc[component];
614 s->last_dc[component] = dc;
615 block[0] = dc << (3 - s->intra_dc_precision);
617 if (s->intra_vlc_format)
623 OPEN_READER(re, &s->gb);
624 /* now quantify & encode AC coefficients */
626 UPDATE_CACHE(re, &s->gb);
627 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
629 if (level >= 64 || i > 63) {
631 } else if (level != 0) {
634 level = (level * qscale * quant_matrix[j]) >> 4;
635 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
636 LAST_SKIP_BITS(re, &s->gb, 1);
639 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
640 UPDATE_CACHE(re, &s->gb);
641 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
645 level = (-level * qscale * quant_matrix[j]) >> 4;
648 level = (level * qscale * quant_matrix[j]) >> 4;
654 CLOSE_READER(re, &s->gb);
657 s->block_last_index[n] = i;
661 /******************************************/
664 static inline int get_dmv(MpegEncContext *s)
666 if (get_bits1(&s->gb))
667 return 1 - (get_bits1(&s->gb) << 1);
672 static inline int get_qscale(MpegEncContext *s)
674 int qscale = get_bits(&s->gb, 5);
675 if (s->q_scale_type) {
676 return non_linear_qscale[qscale];
683 /* motion type (for MPEG-2) */
689 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
691 int i, j, k, cbp, val, mb_type, motion_type;
692 const int mb_block_count = 4 + (1 << s->chroma_format);
694 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
696 av_assert2(s->mb_skipped == 0);
698 if (s->mb_skip_run-- != 0) {
699 if (s->pict_type == AV_PICTURE_TYPE_P) {
701 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
706 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
708 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
709 if (IS_INTRA(mb_type)) {
710 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
713 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
714 mb_type | MB_TYPE_SKIP;
716 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
723 switch (s->pict_type) {
725 case AV_PICTURE_TYPE_I:
726 if (get_bits1(&s->gb) == 0) {
727 if (get_bits1(&s->gb) == 0) {
728 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
731 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
733 mb_type = MB_TYPE_INTRA;
736 case AV_PICTURE_TYPE_P:
737 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
739 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
742 mb_type = ptype2mb_type[mb_type];
744 case AV_PICTURE_TYPE_B:
745 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
747 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
750 mb_type = btype2mb_type[mb_type];
753 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
754 // motion_type = 0; /* avoid warning */
755 if (IS_INTRA(mb_type)) {
756 s->dsp.clear_blocks(s->block[0]);
758 if (!s->chroma_y_shift) {
759 s->dsp.clear_blocks(s->block[6]);
762 /* compute DCT type */
763 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
764 !s->frame_pred_frame_dct) {
765 s->interlaced_dct = get_bits1(&s->gb);
768 if (IS_QUANT(mb_type))
769 s->qscale = get_qscale(s);
771 if (s->concealment_motion_vectors) {
772 /* just parse them */
773 if (s->picture_structure != PICT_FRAME)
774 skip_bits1(&s->gb); /* field select */
776 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
777 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
778 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
779 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
781 skip_bits1(&s->gb); /* marker */
783 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
785 // if 1, we memcpy blocks in xvmcvideo
786 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
787 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
790 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
791 if (s->flags2 & CODEC_FLAG2_FAST) {
792 for (i = 0; i < 6; i++) {
793 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
796 for (i = 0; i < mb_block_count; i++) {
797 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
802 for (i = 0; i < 6; i++) {
803 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
808 if (mb_type & MB_TYPE_ZERO_MV) {
809 av_assert2(mb_type & MB_TYPE_CBP);
811 s->mv_dir = MV_DIR_FORWARD;
812 if (s->picture_structure == PICT_FRAME) {
813 if (s->picture_structure == PICT_FRAME
814 && !s->frame_pred_frame_dct)
815 s->interlaced_dct = get_bits1(&s->gb);
816 s->mv_type = MV_TYPE_16X16;
818 s->mv_type = MV_TYPE_FIELD;
819 mb_type |= MB_TYPE_INTERLACED;
820 s->field_select[0][0] = s->picture_structure - 1;
823 if (IS_QUANT(mb_type))
824 s->qscale = get_qscale(s);
826 s->last_mv[0][0][0] = 0;
827 s->last_mv[0][0][1] = 0;
828 s->last_mv[0][1][0] = 0;
829 s->last_mv[0][1][1] = 0;
833 av_assert2(mb_type & MB_TYPE_L0L1);
834 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
835 /* get additional motion vector type */
836 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
837 motion_type = MT_FRAME;
839 motion_type = get_bits(&s->gb, 2);
840 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
841 s->interlaced_dct = get_bits1(&s->gb);
844 if (IS_QUANT(mb_type))
845 s->qscale = get_qscale(s);
848 s->mv_dir = (mb_type >> 13) & 3;
849 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
850 switch (motion_type) {
851 case MT_FRAME: /* or MT_16X8 */
852 if (s->picture_structure == PICT_FRAME) {
853 mb_type |= MB_TYPE_16x16;
854 s->mv_type = MV_TYPE_16X16;
855 for (i = 0; i < 2; i++) {
856 if (USES_LIST(mb_type, i)) {
858 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
859 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
860 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
861 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
862 /* full_pel: only for MPEG-1 */
863 if (s->full_pel[i]) {
864 s->mv[i][0][0] <<= 1;
865 s->mv[i][0][1] <<= 1;
870 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
871 s->mv_type = MV_TYPE_16X8;
872 for (i = 0; i < 2; i++) {
873 if (USES_LIST(mb_type, i)) {
875 for (j = 0; j < 2; j++) {
876 s->field_select[i][j] = get_bits1(&s->gb);
877 for (k = 0; k < 2; k++) {
878 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
879 s->last_mv[i][j][k]);
880 s->last_mv[i][j][k] = val;
881 s->mv[i][j][k] = val;
889 s->mv_type = MV_TYPE_FIELD;
890 if (s->picture_structure == PICT_FRAME) {
891 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
892 for (i = 0; i < 2; i++) {
893 if (USES_LIST(mb_type, i)) {
894 for (j = 0; j < 2; j++) {
895 s->field_select[i][j] = get_bits1(&s->gb);
896 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
897 s->last_mv[i][j][0]);
898 s->last_mv[i][j][0] = val;
899 s->mv[i][j][0] = val;
900 av_dlog(s->avctx, "fmx=%d\n", val);
901 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
902 s->last_mv[i][j][1] >> 1);
903 s->last_mv[i][j][1] = val << 1;
904 s->mv[i][j][1] = val;
905 av_dlog(s->avctx, "fmy=%d\n", val);
910 av_assert0(!s->progressive_sequence);
911 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
912 for (i = 0; i < 2; i++) {
913 if (USES_LIST(mb_type, i)) {
914 s->field_select[i][0] = get_bits1(&s->gb);
915 for (k = 0; k < 2; k++) {
916 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
917 s->last_mv[i][0][k]);
918 s->last_mv[i][0][k] = val;
919 s->last_mv[i][1][k] = val;
920 s->mv[i][0][k] = val;
927 if(s->progressive_sequence){
928 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
931 s->mv_type = MV_TYPE_DMV;
932 for (i = 0; i < 2; i++) {
933 if (USES_LIST(mb_type, i)) {
934 int dmx, dmy, mx, my, m;
935 const int my_shift = s->picture_structure == PICT_FRAME;
937 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
938 s->last_mv[i][0][0]);
939 s->last_mv[i][0][0] = mx;
940 s->last_mv[i][1][0] = mx;
942 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
943 s->last_mv[i][0][1] >> my_shift);
947 s->last_mv[i][0][1] = my << my_shift;
948 s->last_mv[i][1][1] = my << my_shift;
952 s->mv[i][1][0] = mx; // not used
953 s->mv[i][1][1] = my; // not used
955 if (s->picture_structure == PICT_FRAME) {
956 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
958 // m = 1 + 2 * s->top_field_first;
959 m = s->top_field_first ? 1 : 3;
961 /* top -> top pred */
962 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
963 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
965 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
966 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
968 mb_type |= MB_TYPE_16x16;
970 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
971 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
972 if (s->picture_structure == PICT_TOP_FIELD)
981 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
987 if (HAS_CBP(mb_type)) {
988 s->dsp.clear_blocks(s->block[0]);
990 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
991 if (mb_block_count > 6) {
992 cbp <<= mb_block_count - 6;
993 cbp |= get_bits(&s->gb, mb_block_count - 6);
994 s->dsp.clear_blocks(s->block[6]);
997 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1001 //if 1, we memcpy blocks in xvmcvideo
1002 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
1003 ff_xvmc_pack_pblocks(s, cbp);
1006 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1007 if (s->flags2 & CODEC_FLAG2_FAST) {
1008 for (i = 0; i < 6; i++) {
1010 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1012 s->block_last_index[i] = -1;
1017 cbp <<= 12-mb_block_count;
1019 for (i = 0; i < mb_block_count; i++) {
1020 if (cbp & (1 << 11)) {
1021 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1024 s->block_last_index[i] = -1;
1030 if (s->flags2 & CODEC_FLAG2_FAST) {
1031 for (i = 0; i < 6; i++) {
1033 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1035 s->block_last_index[i] = -1;
1040 for (i = 0; i < 6; i++) {
1042 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1045 s->block_last_index[i] = -1;
1052 for (i = 0; i < 12; i++)
1053 s->block_last_index[i] = -1;
1057 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1062 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1064 Mpeg1Context *s = avctx->priv_data;
1065 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1068 /* we need some permutation to store matrices,
1069 * until MPV_common_init() sets the real permutation. */
1070 for (i = 0; i < 64; i++)
1071 s2->dsp.idct_permutation[i]=i;
1073 ff_MPV_decode_defaults(s2);
1075 s->mpeg_enc_ctx.avctx = avctx;
1076 s->mpeg_enc_ctx.flags = avctx->flags;
1077 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1078 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1079 ff_mpeg12_init_vlcs();
1081 s->mpeg_enc_ctx_allocated = 0;
1082 s->mpeg_enc_ctx.picture_number = 0;
1083 s->repeat_field = 0;
1084 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1085 avctx->color_range = AVCOL_RANGE_MPEG;
1086 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1087 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1089 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1093 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1095 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1096 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1099 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1102 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1103 if (err) return err;
1105 if (!ctx->mpeg_enc_ctx_allocated)
1106 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1108 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1109 s->picture_number++;
1114 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1115 const uint8_t *new_perm)
1117 uint16_t temp_matrix[64];
1120 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1122 for (i = 0; i < 64; i++) {
1123 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1127 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1128 #if CONFIG_MPEG1_XVMC_HWACCEL
1131 #if CONFIG_MPEG1_VDPAU_HWACCEL
1132 AV_PIX_FMT_VDPAU_MPEG1,
1139 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1140 #if CONFIG_MPEG2_XVMC_HWACCEL
1143 #if CONFIG_MPEG2_VDPAU_HWACCEL
1144 AV_PIX_FMT_VDPAU_MPEG2,
1147 #if CONFIG_MPEG2_DXVA2_HWACCEL
1148 AV_PIX_FMT_DXVA2_VLD,
1150 #if CONFIG_MPEG2_VAAPI_HWACCEL
1151 AV_PIX_FMT_VAAPI_VLD,
1157 static inline int uses_vdpau(AVCodecContext *avctx) {
1158 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1161 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1163 Mpeg1Context *s1 = avctx->priv_data;
1164 MpegEncContext *s = &s1->mpeg_enc_ctx;
1166 if(s->chroma_format < 2) {
1167 return ff_thread_get_format(avctx,
1168 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1169 mpeg1_hwaccel_pixfmt_list_420 :
1170 mpeg2_hwaccel_pixfmt_list_420);
1171 } else if(s->chroma_format == 2)
1172 return AV_PIX_FMT_YUV422P;
1174 return AV_PIX_FMT_YUV444P;
1177 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1179 avctx->hwaccel = ff_find_hwaccel(avctx);
1180 // until then pix_fmt may be changed right after codec init
1181 if (avctx->hwaccel || uses_vdpau(avctx))
1182 if (avctx->idct_algo == FF_IDCT_AUTO)
1183 avctx->idct_algo = FF_IDCT_SIMPLE;
1185 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1186 Mpeg1Context *s1 = avctx->priv_data;
1187 MpegEncContext *s = &s1->mpeg_enc_ctx;
1189 s->pack_pblocks = 1;
1191 avctx->xvmc_acceleration = 2;
1192 #endif /* FF_API_XVMC */
1196 /* Call this function when we know all parameters.
1197 * It may be called in different places for MPEG-1 and MPEG-2. */
1198 static int mpeg_decode_postinit(AVCodecContext *avctx)
1200 Mpeg1Context *s1 = avctx->priv_data;
1201 MpegEncContext *s = &s1->mpeg_enc_ctx;
1202 uint8_t old_permutation[64];
1205 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1206 avctx->coded_width != s->width ||
1207 avctx->coded_height != s->height ||
1208 s1->save_width != s->width ||
1209 s1->save_height != s->height ||
1210 s1->save_aspect_info != s->aspect_ratio_info ||
1211 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1215 if (s1->mpeg_enc_ctx_allocated) {
1216 ParseContext pc = s->parse_context;
1217 s->parse_context.buffer = 0;
1218 ff_MPV_common_end(s);
1219 s->parse_context = pc;
1220 s1->mpeg_enc_ctx_allocated = 0;
1223 if ((s->width == 0) || (s->height == 0))
1226 ret = ff_set_dimensions(avctx, s->width, s->height);
1230 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1231 avctx->rc_max_rate = s->bit_rate;
1232 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1233 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1234 avctx->bit_rate = s->bit_rate;
1236 s1->save_aspect_info = s->aspect_ratio_info;
1237 s1->save_width = s->width;
1238 s1->save_height = s->height;
1239 s1->save_progressive_seq = s->progressive_sequence;
1241 /* low_delay may be forced, in this case we will have B-frames
1242 * that behave like P-frames. */
1243 avctx->has_b_frames = !s->low_delay;
1245 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1247 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1248 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1250 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1251 avctx->ticks_per_frame=1;
1254 av_reduce(&s->avctx->time_base.den,
1255 &s->avctx->time_base.num,
1256 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1257 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1259 avctx->ticks_per_frame = 2;
1261 if (s->aspect_ratio_info > 1) {
1263 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1264 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1265 (AVRational) {s->width, s->height});
1267 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1268 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1269 // issue1613, 621, 562
1270 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1271 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1272 s->avctx->sample_aspect_ratio =
1273 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1274 (AVRational) {s->width, s->height});
1276 s->avctx->sample_aspect_ratio =
1277 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1278 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1279 //issue1613 4/3 16/9 -> 16/9
1280 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1281 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1282 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1283 av_dlog(avctx, "A %d/%d\n",
1284 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1285 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1286 s->avctx->sample_aspect_ratio.den);
1289 s->avctx->sample_aspect_ratio =
1290 ff_mpeg2_aspect[s->aspect_ratio_info];
1294 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1295 setup_hwaccel_for_pixfmt(avctx);
1297 /* Quantization matrices may need reordering
1298 * if DCT permutation is changed. */
1299 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1301 if (ff_MPV_common_init(s) < 0)
1304 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1305 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1306 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1307 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1309 s1->mpeg_enc_ctx_allocated = 1;
1314 static int mpeg1_decode_picture(AVCodecContext *avctx,
1315 const uint8_t *buf, int buf_size)
1317 Mpeg1Context *s1 = avctx->priv_data;
1318 MpegEncContext *s = &s1->mpeg_enc_ctx;
1319 int ref, f_code, vbv_delay;
1321 init_get_bits(&s->gb, buf, buf_size*8);
1323 ref = get_bits(&s->gb, 10); /* temporal ref */
1324 s->pict_type = get_bits(&s->gb, 3);
1325 if (s->pict_type == 0 || s->pict_type > 3)
1328 vbv_delay = get_bits(&s->gb, 16);
1329 s->vbv_delay = vbv_delay;
1330 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1331 s->full_pel[0] = get_bits1(&s->gb);
1332 f_code = get_bits(&s->gb, 3);
1333 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1336 s->mpeg_f_code[0][0] = f_code;
1337 s->mpeg_f_code[0][1] = f_code;
1339 if (s->pict_type == AV_PICTURE_TYPE_B) {
1340 s->full_pel[1] = get_bits1(&s->gb);
1341 f_code = get_bits(&s->gb, 3);
1342 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1345 s->mpeg_f_code[1][0] = f_code;
1346 s->mpeg_f_code[1][1] = f_code;
1348 s->current_picture.f.pict_type = s->pict_type;
1349 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1351 if (avctx->debug & FF_DEBUG_PICT_INFO)
1352 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1359 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1361 MpegEncContext *s= &s1->mpeg_enc_ctx;
1362 int horiz_size_ext, vert_size_ext;
1365 skip_bits(&s->gb, 1); /* profile and level esc*/
1366 s->avctx->profile = get_bits(&s->gb, 3);
1367 s->avctx->level = get_bits(&s->gb, 4);
1368 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1369 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1370 horiz_size_ext = get_bits(&s->gb, 2);
1371 vert_size_ext = get_bits(&s->gb, 2);
1372 s->width |= (horiz_size_ext << 12);
1373 s->height |= (vert_size_ext << 12);
1374 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1375 s->bit_rate += (bit_rate_ext << 18) * 400;
1376 skip_bits1(&s->gb); /* marker */
1377 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1379 s->low_delay = get_bits1(&s->gb);
1380 if (s->flags & CODEC_FLAG_LOW_DELAY)
1383 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1384 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1386 av_dlog(s->avctx, "sequence extension\n");
1387 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1389 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1390 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1391 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1395 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1397 MpegEncContext *s = &s1->mpeg_enc_ctx;
1398 int color_description, w, h;
1400 skip_bits(&s->gb, 3); /* video format */
1401 color_description = get_bits1(&s->gb);
1402 if (color_description) {
1403 s->avctx->color_primaries = get_bits(&s->gb, 8);
1404 s->avctx->color_trc = get_bits(&s->gb, 8);
1405 s->avctx->colorspace = get_bits(&s->gb, 8);
1407 w = get_bits(&s->gb, 14);
1408 skip_bits(&s->gb, 1); //marker
1409 h = get_bits(&s->gb, 14);
1410 // remaining 3 bits are zero padding
1412 s1->pan_scan.width = 16 * w;
1413 s1->pan_scan.height = 16 * h;
1415 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1416 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1419 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1421 MpegEncContext *s = &s1->mpeg_enc_ctx;
1425 if (s->progressive_sequence) {
1426 if (s->repeat_first_field) {
1428 if (s->top_field_first)
1432 if (s->picture_structure == PICT_FRAME) {
1434 if (s->repeat_first_field)
1438 for (i = 0; i < nofco; i++) {
1439 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1440 skip_bits(&s->gb, 1); // marker
1441 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1442 skip_bits(&s->gb, 1); // marker
1445 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1446 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1447 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1448 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1449 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1452 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1456 for (i = 0; i < 64; i++) {
1457 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1458 int v = get_bits(&s->gb, 8);
1460 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1463 if (intra && i == 0 && v != 8) {
1464 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1465 v = 8; // needed by pink.mpg / issue1046
1474 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1476 av_dlog(s->avctx, "matrix extension\n");
1478 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1479 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1480 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1481 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1484 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1486 MpegEncContext *s = &s1->mpeg_enc_ctx;
1488 s->full_pel[0] = s->full_pel[1] = 0;
1489 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1490 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1491 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1492 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1493 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1494 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1495 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1496 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1497 s->pict_type = AV_PICTURE_TYPE_I;
1499 s->pict_type = AV_PICTURE_TYPE_P;
1501 s->pict_type = AV_PICTURE_TYPE_B;
1502 s->current_picture.f.pict_type = s->pict_type;
1503 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1505 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1506 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1507 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1508 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1510 s->intra_dc_precision = get_bits(&s->gb, 2);
1511 s->picture_structure = get_bits(&s->gb, 2);
1512 s->top_field_first = get_bits1(&s->gb);
1513 s->frame_pred_frame_dct = get_bits1(&s->gb);
1514 s->concealment_motion_vectors = get_bits1(&s->gb);
1515 s->q_scale_type = get_bits1(&s->gb);
1516 s->intra_vlc_format = get_bits1(&s->gb);
1517 s->alternate_scan = get_bits1(&s->gb);
1518 s->repeat_first_field = get_bits1(&s->gb);
1519 s->chroma_420_type = get_bits1(&s->gb);
1520 s->progressive_frame = get_bits1(&s->gb);
1523 if (s->alternate_scan) {
1524 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1525 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1527 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1528 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1531 /* composite display not parsed */
1532 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1533 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1534 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1535 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1536 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1537 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1538 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1539 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1540 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1543 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1545 AVCodecContext *avctx = s->avctx;
1546 Mpeg1Context *s1 = (Mpeg1Context*)s;
1548 /* start frame decoding */
1549 if (s->first_field || s->picture_structure == PICT_FRAME) {
1550 AVFrameSideData *pan_scan;
1552 if (ff_MPV_frame_start(s, avctx) < 0)
1555 ff_mpeg_er_frame_start(s);
1557 /* first check if we must repeat the frame */
1558 s->current_picture_ptr->f.repeat_pict = 0;
1559 if (s->repeat_first_field) {
1560 if (s->progressive_sequence) {
1561 if (s->top_field_first)
1562 s->current_picture_ptr->f.repeat_pict = 4;
1564 s->current_picture_ptr->f.repeat_pict = 2;
1565 } else if (s->progressive_frame) {
1566 s->current_picture_ptr->f.repeat_pict = 1;
1570 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1571 AV_FRAME_DATA_PANSCAN,
1572 sizeof(s1->pan_scan));
1574 return AVERROR(ENOMEM);
1575 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1577 if (s1->a53_caption) {
1578 AVFrameSideData *sd = av_frame_new_side_data(
1579 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1580 s1->a53_caption_size);
1582 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1583 av_freep(&s1->a53_caption);
1585 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1586 ff_thread_finish_setup(avctx);
1587 } else { // second field
1590 if (!s->current_picture_ptr) {
1591 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1595 if (s->avctx->hwaccel &&
1596 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1597 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1598 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1601 for (i = 0; i < 4; i++) {
1602 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1603 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1604 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1609 if (avctx->hwaccel) {
1610 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1617 #define DECODE_SLICE_ERROR -1
1618 #define DECODE_SLICE_OK 0
1622 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1623 * @return DECODE_SLICE_ERROR if the slice is damaged,
1624 * DECODE_SLICE_OK if this slice is OK
1626 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1627 const uint8_t **buf, int buf_size)
1629 AVCodecContext *avctx = s->avctx;
1630 const int lowres = s->avctx->lowres;
1631 const int field_pic = s->picture_structure != PICT_FRAME;
1634 s->resync_mb_y = -1;
1636 av_assert0(mb_y < s->mb_height);
1638 init_get_bits(&s->gb, *buf, buf_size * 8);
1639 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1640 skip_bits(&s->gb, 3);
1642 ff_mpeg1_clean_buffers(s);
1643 s->interlaced_dct = 0;
1645 s->qscale = get_qscale(s);
1647 if (s->qscale == 0) {
1648 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1652 /* extra slice info */
1653 if (skip_1stop_8data_bits(&s->gb) < 0)
1654 return AVERROR_INVALIDDATA;
1658 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1661 while (get_bits_left(&s->gb) > 0) {
1662 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1663 MBINCR_VLC_BITS, 2);
1665 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1672 /* otherwise, stuffing, nothing to do */
1680 if (s->mb_x >= (unsigned)s->mb_width) {
1681 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1685 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1686 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1687 int start_code = -1;
1688 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1689 if (buf_end < *buf + buf_size)
1692 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1693 return DECODE_SLICE_ERROR;
1695 return DECODE_SLICE_OK;
1698 s->resync_mb_x = s->mb_x;
1699 s->resync_mb_y = s->mb_y = mb_y;
1701 ff_init_block_index(s);
1703 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1704 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1705 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",
1706 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],
1707 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")),
1708 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1709 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1710 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1715 // If 1, we memcpy blocks in xvmcvideo.
1716 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1717 ff_xvmc_init_block(s); // set s->block
1719 if (mpeg_decode_mb(s, s->block) < 0)
1722 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1723 const int wrap = s->b8_stride;
1724 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1725 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1726 int motion_x, motion_y, dir, i;
1728 for (i = 0; i < 2; i++) {
1729 for (dir = 0; dir < 2; dir++) {
1730 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1731 motion_x = motion_y = 0;
1732 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1733 motion_x = s->mv[dir][0][0];
1734 motion_y = s->mv[dir][0][1];
1735 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1736 motion_x = s->mv[dir][i][0];
1737 motion_y = s->mv[dir][i][1];
1740 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1741 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1742 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1743 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1744 s->current_picture.ref_index [dir][b8_xy ] =
1745 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1746 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1753 s->dest[0] += 16 >> lowres;
1754 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1755 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1757 ff_MPV_decode_mb(s, s->block);
1759 if (++s->mb_x >= s->mb_width) {
1760 const int mb_size = 16 >> s->avctx->lowres;
1762 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1763 ff_MPV_report_decode_progress(s);
1766 s->mb_y += 1 << field_pic;
1768 if (s->mb_y >= s->mb_height) {
1769 int left = get_bits_left(&s->gb);
1770 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1771 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1772 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1774 if (left >= 32 && !is_d10) {
1775 GetBitContext gb = s->gb;
1776 align_get_bits(&gb);
1777 if (show_bits(&gb, 24) == 0x060E2B) {
1778 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1783 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1784 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1785 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1791 ff_init_block_index(s);
1794 /* skip mb handling */
1795 if (s->mb_skip_run == -1) {
1796 /* read increment again */
1799 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1800 MBINCR_VLC_BITS, 2);
1802 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1807 s->mb_skip_run += 33;
1808 } else if (code == 35) {
1809 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1810 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1813 goto eos; /* end of slice */
1815 /* otherwise, stuffing, nothing to do */
1817 s->mb_skip_run += code;
1821 if (s->mb_skip_run) {
1823 if (s->pict_type == AV_PICTURE_TYPE_I) {
1824 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1830 for (i = 0; i < 12; i++)
1831 s->block_last_index[i] = -1;
1832 if (s->picture_structure == PICT_FRAME)
1833 s->mv_type = MV_TYPE_16X16;
1835 s->mv_type = MV_TYPE_FIELD;
1836 if (s->pict_type == AV_PICTURE_TYPE_P) {
1837 /* if P type, zero motion vector is implied */
1838 s->mv_dir = MV_DIR_FORWARD;
1839 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1840 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1841 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1842 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1844 /* if B type, reuse previous vectors and directions */
1845 s->mv[0][0][0] = s->last_mv[0][0][0];
1846 s->mv[0][0][1] = s->last_mv[0][0][1];
1847 s->mv[1][0][0] = s->last_mv[1][0][0];
1848 s->mv[1][0][1] = s->last_mv[1][0][1];
1853 eos: // end of slice
1854 if (get_bits_left(&s->gb) < 0)
1855 return AVERROR_INVALIDDATA;
1856 *buf += (get_bits_count(&s->gb)-1)/8;
1857 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1861 static int slice_decode_thread(AVCodecContext *c, void *arg)
1863 MpegEncContext *s = *(void**)arg;
1864 const uint8_t *buf = s->gb.buffer;
1865 int mb_y = s->start_mb_y;
1866 const int field_pic = s->picture_structure != PICT_FRAME;
1868 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1871 uint32_t start_code;
1874 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1876 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1877 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1878 s->start_mb_y, s->end_mb_y, s->er.error_count);
1880 if (c->err_recognition & AV_EF_EXPLODE)
1882 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1883 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);
1885 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);
1888 if (s->mb_y == s->end_mb_y)
1892 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1893 mb_y= start_code - SLICE_MIN_START_CODE;
1894 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1895 mb_y += (*buf&0xE0)<<2;
1897 if (s->picture_structure == PICT_BOTTOM_FIELD)
1899 if (mb_y < 0 || mb_y >= s->end_mb_y)
1905 * Handle slice ends.
1906 * @return 1 if it seems to be the last slice
1908 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1910 Mpeg1Context *s1 = avctx->priv_data;
1911 MpegEncContext *s = &s1->mpeg_enc_ctx;
1913 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1916 if (s->avctx->hwaccel) {
1917 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1918 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1921 /* end of slice reached */
1922 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1925 ff_er_frame_end(&s->er);
1927 ff_MPV_frame_end(s);
1929 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1930 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1933 ff_print_debug_info(s, s->current_picture_ptr, pict);
1934 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1936 if (avctx->active_thread_type & FF_THREAD_FRAME)
1937 s->picture_number++;
1938 /* latency of 1 frame for I- and P-frames */
1939 /* XXX: use another variable than picture_number */
1940 if (s->last_picture_ptr != NULL) {
1941 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1944 ff_print_debug_info(s, s->last_picture_ptr, pict);
1945 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1955 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1956 const uint8_t *buf, int buf_size)
1958 Mpeg1Context *s1 = avctx->priv_data;
1959 MpegEncContext *s = &s1->mpeg_enc_ctx;
1963 init_get_bits(&s->gb, buf, buf_size*8);
1965 width = get_bits(&s->gb, 12);
1966 height = get_bits(&s->gb, 12);
1967 if (width == 0 || height == 0) {
1968 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1970 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1971 return AVERROR_INVALIDDATA;
1973 s->aspect_ratio_info = get_bits(&s->gb, 4);
1974 if (s->aspect_ratio_info == 0) {
1975 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1976 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1979 s->frame_rate_index = get_bits(&s->gb, 4);
1980 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1982 s->bit_rate = get_bits(&s->gb, 18) * 400;
1983 if (get_bits1(&s->gb) == 0) /* marker */
1988 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1989 skip_bits(&s->gb, 1);
1992 if (get_bits1(&s->gb)) {
1993 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1995 for (i = 0; i < 64; i++) {
1996 j = s->dsp.idct_permutation[i];
1997 v = ff_mpeg1_default_intra_matrix[i];
1998 s->intra_matrix[j] = v;
1999 s->chroma_intra_matrix[j] = v;
2002 if (get_bits1(&s->gb)) {
2003 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2005 for (i = 0; i < 64; i++) {
2006 int j = s->dsp.idct_permutation[i];
2007 v = ff_mpeg1_default_non_intra_matrix[i];
2008 s->inter_matrix[j] = v;
2009 s->chroma_inter_matrix[j] = v;
2013 if (show_bits(&s->gb, 23) != 0) {
2014 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2018 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2019 s->progressive_sequence = 1;
2020 s->progressive_frame = 1;
2021 s->picture_structure = PICT_FRAME;
2023 s->frame_pred_frame_dct = 1;
2024 s->chroma_format = 1;
2025 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2026 s->out_format = FMT_MPEG1;
2027 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2028 if (s->flags & CODEC_FLAG_LOW_DELAY)
2031 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2032 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2033 s->avctx->rc_buffer_size, s->bit_rate);
2038 static int vcr2_init_sequence(AVCodecContext *avctx)
2040 Mpeg1Context *s1 = avctx->priv_data;
2041 MpegEncContext *s = &s1->mpeg_enc_ctx;
2044 /* start new MPEG-1 context decoding */
2045 s->out_format = FMT_MPEG1;
2046 if (s1->mpeg_enc_ctx_allocated) {
2047 ff_MPV_common_end(s);
2048 s1->mpeg_enc_ctx_allocated = 0;
2050 s->width = avctx->coded_width;
2051 s->height = avctx->coded_height;
2052 avctx->has_b_frames = 0; // true?
2055 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2056 setup_hwaccel_for_pixfmt(avctx);
2058 if (ff_MPV_common_init(s) < 0)
2060 s1->mpeg_enc_ctx_allocated = 1;
2062 for (i = 0; i < 64; i++) {
2063 int j = s->dsp.idct_permutation[i];
2064 v = ff_mpeg1_default_intra_matrix[i];
2065 s->intra_matrix[j] = v;
2066 s->chroma_intra_matrix[j] = v;
2068 v = ff_mpeg1_default_non_intra_matrix[i];
2069 s->inter_matrix[j] = v;
2070 s->chroma_inter_matrix[j] = v;
2073 s->progressive_sequence = 1;
2074 s->progressive_frame = 1;
2075 s->picture_structure = PICT_FRAME;
2077 s->frame_pred_frame_dct = 1;
2078 s->chroma_format = 1;
2079 if (s->codec_tag == AV_RL32("BW10")) {
2080 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2082 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2083 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2085 s1->save_width = s->width;
2086 s1->save_height = s->height;
2087 s1->save_progressive_seq = s->progressive_sequence;
2092 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2093 const uint8_t *p, int buf_size)
2095 Mpeg1Context *s1 = avctx->priv_data;
2097 if (buf_size >= 6 &&
2098 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2099 p[4] == 3 && (p[5] & 0x40)) {
2100 /* extract A53 Part 4 CC data */
2101 int cc_count = p[5] & 0x1f;
2102 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2103 av_freep(&s1->a53_caption);
2104 s1->a53_caption_size = cc_count * 3;
2105 s1->a53_caption = av_malloc(s1->a53_caption_size);
2106 if (s1->a53_caption) {
2107 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2111 } else if (buf_size >= 11 &&
2112 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2113 /* extract DVD CC data */
2116 // There is a caption count field in the data, but it is often
2117 // incorect. So count the number of captions present.
2118 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2120 // Transform the DVD format into A53 Part 4 format
2122 av_freep(&s1->a53_caption);
2123 s1->a53_caption_size = cc_count * 6;
2124 s1->a53_caption = av_malloc(s1->a53_caption_size);
2125 if (s1->a53_caption) {
2126 uint8_t field1 = !!(p[4] & 0x80);
2127 uint8_t *cap = s1->a53_caption;
2129 for (i = 0; i < cc_count; i++) {
2130 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2133 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2146 static void mpeg_decode_user_data(AVCodecContext *avctx,
2147 const uint8_t *p, int buf_size)
2149 Mpeg1Context *s = avctx->priv_data;
2150 const uint8_t *buf_end = p + buf_size;
2155 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2159 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2160 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2162 av_log(avctx, AV_LOG_ERROR, "\n");*/
2165 /* we parse the DTG active format information */
2166 if (buf_end - p >= 5 &&
2167 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2175 if (buf_end - p < 1)
2177 avctx->dtg_active_format = p[0] & 0x0f;
2179 } else if (buf_end - p >= 6 &&
2180 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2181 p[4] == 0x03) { // S3D_video_format_length
2182 // the 0x7F mask ignores the reserved_bit value
2183 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2185 if (S3D_video_format_type == 0x03 ||
2186 S3D_video_format_type == 0x04 ||
2187 S3D_video_format_type == 0x08 ||
2188 S3D_video_format_type == 0x23) {
2189 Mpeg1Context *s1 = avctx->priv_data;
2190 MpegEncContext *s = &s1->mpeg_enc_ctx;
2192 if (!s->current_picture_ptr)
2195 stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2199 switch (S3D_video_format_type) {
2201 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2204 stereo->type = AV_STEREO3D_TOPBOTTOM;
2207 stereo->type = AV_STEREO3D_2D;
2210 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2214 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2219 static void mpeg_decode_gop(AVCodecContext *avctx,
2220 const uint8_t *buf, int buf_size)
2222 Mpeg1Context *s1 = avctx->priv_data;
2223 MpegEncContext *s = &s1->mpeg_enc_ctx;
2227 init_get_bits(&s->gb, buf, buf_size*8);
2229 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2231 s->closed_gop = get_bits1(&s->gb);
2232 /*broken_link indicate that after editing the
2233 reference frames of the first B-Frames after GOP I-Frame
2234 are missing (open gop)*/
2235 broken_link = get_bits1(&s->gb);
2237 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2238 char tcbuf[AV_TIMECODE_STR_SIZE];
2239 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2240 av_log(s->avctx, AV_LOG_DEBUG,
2241 "GOP (%s) closed_gop=%d broken_link=%d\n",
2242 tcbuf, s->closed_gop, broken_link);
2246 static int decode_chunks(AVCodecContext *avctx,
2247 AVFrame *picture, int *got_output,
2248 const uint8_t *buf, int buf_size)
2250 Mpeg1Context *s = avctx->priv_data;
2251 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2252 const uint8_t *buf_ptr = buf;
2253 const uint8_t *buf_end = buf + buf_size;
2254 int ret, input_size;
2255 int last_code = 0, skip_frame = 0;
2256 int picture_start_code_seen = 0;
2259 /* find next start code */
2260 uint32_t start_code = -1;
2261 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2262 if (start_code > 0x1ff) {
2264 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2267 av_assert0(avctx->thread_count > 1);
2269 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2270 for (i = 0; i < s->slice_count; i++)
2271 s2->er.error_count += s2->thread_context[i]->er.error_count;
2274 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2275 && uses_vdpau(avctx))
2276 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2278 ret = slice_end(avctx, picture);
2282 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2288 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2289 return AVERROR_INVALIDDATA;
2291 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2294 input_size = buf_end - buf_ptr;
2296 if (avctx->debug & FF_DEBUG_STARTCODE) {
2297 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2300 /* prepare data for next start code */
2301 switch (start_code) {
2302 case SEQ_START_CODE:
2303 if (last_code == 0) {
2304 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2305 if(buf != avctx->extradata)
2308 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2309 if (avctx->err_recognition & AV_EF_EXPLODE)
2310 return AVERROR_INVALIDDATA;
2314 case PICTURE_START_CODE:
2315 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2316 /* If it's a frame picture, there can't be more than one picture header.
2317 Yet, it does happen and we need to handle it. */
2318 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2321 picture_start_code_seen = 1;
2323 if (s2->width <= 0 || s2->height <= 0) {
2324 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2325 s2->width, s2->height);
2326 return AVERROR_INVALIDDATA;
2330 s2->intra_dc_precision= 3;
2331 s2->intra_matrix[0]= 1;
2333 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2334 !avctx->hwaccel && s->slice_count) {
2337 avctx->execute(avctx, slice_decode_thread,
2338 s2->thread_context, NULL,
2339 s->slice_count, sizeof(void*));
2340 for (i = 0; i < s->slice_count; i++)
2341 s2->er.error_count += s2->thread_context[i]->er.error_count;
2344 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2345 ret = mpeg_decode_postinit(avctx);
2347 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2351 /* we have a complete image: we try to decompress it */
2352 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2355 last_code = PICTURE_START_CODE;
2357 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2358 if (avctx->err_recognition & AV_EF_EXPLODE)
2359 return AVERROR_INVALIDDATA;
2362 case EXT_START_CODE:
2363 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2365 switch (get_bits(&s2->gb, 4)) {
2367 if (last_code == 0) {
2368 mpeg_decode_sequence_extension(s);
2370 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2371 if (avctx->err_recognition & AV_EF_EXPLODE)
2372 return AVERROR_INVALIDDATA;
2376 mpeg_decode_sequence_display_extension(s);
2379 mpeg_decode_quant_matrix_extension(s2);
2382 mpeg_decode_picture_display_extension(s);
2385 if (last_code == PICTURE_START_CODE) {
2386 mpeg_decode_picture_coding_extension(s);
2388 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2389 if (avctx->err_recognition & AV_EF_EXPLODE)
2390 return AVERROR_INVALIDDATA;
2395 case USER_START_CODE:
2396 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2398 case GOP_START_CODE:
2399 if (last_code == 0) {
2401 mpeg_decode_gop(avctx, buf_ptr, input_size);
2404 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2405 if (avctx->err_recognition & AV_EF_EXPLODE)
2406 return AVERROR_INVALIDDATA;
2410 if (start_code >= SLICE_MIN_START_CODE &&
2411 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2413 if (s2->progressive_sequence && !s2->progressive_frame) {
2414 s2->progressive_frame = 1;
2415 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2418 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2419 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2420 s2->picture_structure = PICT_FRAME;
2423 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2424 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2427 if (s2->picture_structure == PICT_FRAME) {
2428 s2->first_field = 0;
2429 s2->v_edge_pos = 16 * s2->mb_height;
2431 s2->first_field ^= 1;
2432 s2->v_edge_pos = 8 * s2->mb_height;
2433 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2436 if (start_code >= SLICE_MIN_START_CODE &&
2437 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2438 const int field_pic = s2->picture_structure != PICT_FRAME;
2439 int mb_y = start_code - SLICE_MIN_START_CODE;
2440 last_code = SLICE_MIN_START_CODE;
2441 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2442 mb_y += (*buf_ptr&0xE0)<<2;
2445 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2448 if (buf_end - buf_ptr < 2) {
2449 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2450 return AVERROR_INVALIDDATA;
2453 if (mb_y >= s2->mb_height) {
2454 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2458 if (s2->last_picture_ptr == NULL) {
2459 /* Skip B-frames if we do not have reference frames and gop is not closed */
2460 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2461 if (!s2->closed_gop) {
2467 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2469 if (s2->next_picture_ptr == NULL) {
2470 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2471 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2476 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2477 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2478 avctx->skip_frame >= AVDISCARD_ALL) {
2483 if (!s->mpeg_enc_ctx_allocated)
2486 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2487 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2491 if (!s2->pict_type) {
2492 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2493 if (avctx->err_recognition & AV_EF_EXPLODE)
2494 return AVERROR_INVALIDDATA;
2498 if (s->first_slice) {
2501 if (mpeg_field_start(s2, buf, buf_size) < 0)
2504 if (!s2->current_picture_ptr) {
2505 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2506 return AVERROR_INVALIDDATA;
2509 if (uses_vdpau(avctx)) {
2514 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2516 int threshold = (s2->mb_height * s->slice_count +
2517 s2->slice_context_count / 2) /
2518 s2->slice_context_count;
2519 av_assert0(avctx->thread_count > 1);
2520 if (threshold <= mb_y) {
2521 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2523 thread_context->start_mb_y = mb_y;
2524 thread_context->end_mb_y = s2->mb_height;
2525 if (s->slice_count) {
2526 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2527 ret = ff_update_duplicate_context(thread_context,
2532 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2535 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2537 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2541 if (avctx->err_recognition & AV_EF_EXPLODE)
2543 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2544 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);
2546 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);
2555 static int mpeg_decode_frame(AVCodecContext *avctx,
2556 void *data, int *got_output,
2559 const uint8_t *buf = avpkt->data;
2561 int buf_size = avpkt->size;
2562 Mpeg1Context *s = avctx->priv_data;
2563 AVFrame *picture = data;
2564 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2565 av_dlog(avctx, "fill_buffer\n");
2567 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2568 /* special case for last picture */
2569 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2570 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2574 s2->next_picture_ptr = NULL;
2581 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2582 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2584 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2588 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2589 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2590 || s2->codec_tag == AV_RL32("BW10")
2592 vcr2_init_sequence(avctx);
2596 if (avctx->extradata && !s->extradata_decoded) {
2597 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2599 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2602 s->extradata_decoded = 1;
2603 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2604 s2->current_picture_ptr = NULL;
2609 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2610 if (ret<0 || *got_output)
2611 s2->current_picture_ptr = NULL;
2617 static void flush(AVCodecContext *avctx)
2619 Mpeg1Context *s = avctx->priv_data;
2623 ff_mpeg_flush(avctx);
2626 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2628 Mpeg1Context *s = avctx->priv_data;
2630 if (s->mpeg_enc_ctx_allocated)
2631 ff_MPV_common_end(&s->mpeg_enc_ctx);
2632 av_freep(&s->a53_caption);
2636 static const AVProfile mpeg2_video_profiles[] = {
2637 { FF_PROFILE_MPEG2_422, "4:2:2" },
2638 { FF_PROFILE_MPEG2_HIGH, "High" },
2639 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2640 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2641 { FF_PROFILE_MPEG2_MAIN, "Main" },
2642 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2643 { FF_PROFILE_RESERVED, "Reserved" },
2644 { FF_PROFILE_RESERVED, "Reserved" },
2645 { FF_PROFILE_UNKNOWN },
2649 AVCodec ff_mpeg1video_decoder = {
2650 .name = "mpeg1video",
2651 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2652 .type = AVMEDIA_TYPE_VIDEO,
2653 .id = AV_CODEC_ID_MPEG1VIDEO,
2654 .priv_data_size = sizeof(Mpeg1Context),
2655 .init = mpeg_decode_init,
2656 .close = mpeg_decode_end,
2657 .decode = mpeg_decode_frame,
2658 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2659 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2660 CODEC_CAP_SLICE_THREADS,
2663 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2666 AVCodec ff_mpeg2video_decoder = {
2667 .name = "mpeg2video",
2668 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2669 .type = AVMEDIA_TYPE_VIDEO,
2670 .id = AV_CODEC_ID_MPEG2VIDEO,
2671 .priv_data_size = sizeof(Mpeg1Context),
2672 .init = mpeg_decode_init,
2673 .close = mpeg_decode_end,
2674 .decode = mpeg_decode_frame,
2675 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2676 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2677 CODEC_CAP_SLICE_THREADS,
2680 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2684 AVCodec ff_mpegvideo_decoder = {
2685 .name = "mpegvideo",
2686 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2687 .type = AVMEDIA_TYPE_VIDEO,
2688 .id = AV_CODEC_ID_MPEG2VIDEO,
2689 .priv_data_size = sizeof(Mpeg1Context),
2690 .init = mpeg_decode_init,
2691 .close = mpeg_decode_end,
2692 .decode = mpeg_decode_frame,
2693 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2699 #if CONFIG_MPEG_XVMC_DECODER
2700 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2702 if (avctx->active_thread_type & FF_THREAD_SLICE)
2704 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2706 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2707 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2709 mpeg_decode_init(avctx);
2711 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2712 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2717 AVCodec ff_mpeg_xvmc_decoder = {
2718 .name = "mpegvideo_xvmc",
2719 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2720 .type = AVMEDIA_TYPE_VIDEO,
2721 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2722 .priv_data_size = sizeof(Mpeg1Context),
2723 .init = mpeg_mc_decode_init,
2724 .close = mpeg_decode_end,
2725 .decode = mpeg_decode_frame,
2726 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2727 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2732 #endif /* FF_API_XVMC */
2734 #if CONFIG_MPEG_VDPAU_DECODER
2735 AVCodec ff_mpeg_vdpau_decoder = {
2736 .name = "mpegvideo_vdpau",
2737 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2738 .type = AVMEDIA_TYPE_VIDEO,
2739 .id = AV_CODEC_ID_MPEG2VIDEO,
2740 .priv_data_size = sizeof(Mpeg1Context),
2741 .init = mpeg_decode_init,
2742 .close = mpeg_decode_end,
2743 .decode = mpeg_decode_frame,
2744 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2745 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2750 #if CONFIG_MPEG1_VDPAU_DECODER
2751 AVCodec ff_mpeg1_vdpau_decoder = {
2752 .name = "mpeg1video_vdpau",
2753 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2754 .type = AVMEDIA_TYPE_VIDEO,
2755 .id = AV_CODEC_ID_MPEG1VIDEO,
2756 .priv_data_size = sizeof(Mpeg1Context),
2757 .init = mpeg_decode_init,
2758 .close = mpeg_decode_end,
2759 .decode = mpeg_decode_frame,
2760 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2761 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,