3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/attributes.h"
29 #include "libavutil/internal.h"
33 #include "mpegvideo.h"
34 #include "error_resilience.h"
36 #include "mpeg12data.h"
37 #include "bytestream.h"
38 #include "vdpau_internal.h"
39 #include "xvmc_internal.h"
43 typedef struct Mpeg1Context {
44 MpegEncContext mpeg_enc_ctx;
45 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
46 int repeat_field; /* true if we must repeat the field */
47 AVPanScan pan_scan; /**< some temporary storage for the panscan */
52 int save_width, save_height, save_progressive_seq;
53 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
54 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
56 int extradata_decoded;
59 #define MB_TYPE_ZERO_MV 0x20000000
61 static const uint32_t ptype2mb_type[7] = {
63 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
65 MB_TYPE_L0 | MB_TYPE_CBP,
66 MB_TYPE_QUANT | MB_TYPE_INTRA,
67 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
68 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
71 static const uint32_t btype2mb_type[11] = {
74 MB_TYPE_L1 | MB_TYPE_CBP,
76 MB_TYPE_L0 | MB_TYPE_CBP,
78 MB_TYPE_L0L1 | MB_TYPE_CBP,
79 MB_TYPE_QUANT | MB_TYPE_INTRA,
80 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
81 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
82 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
85 static const uint8_t non_linear_qscale[32] = {
86 0, 1, 2, 3, 4, 5, 6, 7,
87 8,10,12,14,16,18,20,22,
88 24,28,32,36,40,44,48,52,
89 56,64,72,80,88,96,104,112,
92 /* as H.263, but only 17 codes */
93 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
95 int code, sign, val, shift;
97 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
105 sign = get_bits1(&s->gb);
109 val = (val - 1) << shift;
110 val |= get_bits(&s->gb, shift);
117 /* modulo decoding */
118 return sign_extend(val, 5 + shift);
121 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
123 int level, dc, diff, i, j, run;
125 RLTable *rl = &ff_rl_mpeg1;
126 uint8_t * const scantable = s->intra_scantable.permutated;
127 const uint16_t *quant_matrix = s->intra_matrix;
128 const int qscale = s->qscale;
131 component = (n <= 3 ? 0 : n - 4 + 1);
132 diff = decode_dc(&s->gb, component);
135 dc = s->last_dc[component];
137 s->last_dc[component] = dc;
138 block[0] = dc * quant_matrix[0];
139 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
142 OPEN_READER(re, &s->gb);
143 /* now quantify & encode AC coefficients */
145 UPDATE_CACHE(re, &s->gb);
146 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
150 } else if (level != 0) {
153 level = (level * qscale * quant_matrix[j]) >> 4;
154 level = (level - 1) | 1;
155 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
156 LAST_SKIP_BITS(re, &s->gb, 1);
159 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
160 UPDATE_CACHE(re, &s->gb);
161 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
163 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
164 } else if (level == 0) {
165 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
171 level = (level * qscale * quant_matrix[j]) >> 4;
172 level = (level - 1) | 1;
175 level = (level * qscale * quant_matrix[j]) >> 4;
176 level = (level - 1) | 1;
180 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
186 CLOSE_READER(re, &s->gb);
188 s->block_last_index[n] = i;
192 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
194 return mpeg1_decode_block_intra(s, block, n);
197 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
199 int level, i, j, run;
200 RLTable *rl = &ff_rl_mpeg1;
201 uint8_t * const scantable = s->intra_scantable.permutated;
202 const uint16_t *quant_matrix = s->inter_matrix;
203 const int qscale = s->qscale;
206 OPEN_READER(re, &s->gb);
208 // special case for first coefficient, no need to add second VLC table
209 UPDATE_CACHE(re, &s->gb);
210 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
211 level = (3 * qscale * quant_matrix[0]) >> 5;
212 level = (level - 1) | 1;
213 if (GET_CACHE(re, &s->gb) & 0x40000000)
217 SKIP_BITS(re, &s->gb, 2);
218 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
221 /* now quantify & encode AC coefficients */
223 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
228 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
229 level = (level - 1) | 1;
230 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
231 SKIP_BITS(re, &s->gb, 1);
234 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
235 UPDATE_CACHE(re, &s->gb);
236 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
238 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
239 } else if (level == 0) {
240 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
246 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
247 level = (level - 1) | 1;
250 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
251 level = (level - 1) | 1;
255 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
260 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
262 UPDATE_CACHE(re, &s->gb);
265 LAST_SKIP_BITS(re, &s->gb, 2);
266 CLOSE_READER(re, &s->gb);
268 s->block_last_index[n] = i;
273 * Note: this function can read out of range and crash for corrupt streams.
274 * Changing this would eat up any speed benefits it has.
275 * Do not use "fast" flag if you need the code to be robust.
277 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
279 int level, i, j, run;
280 RLTable *rl = &ff_rl_mpeg1;
281 uint8_t * const scantable = s->intra_scantable.permutated;
282 const int qscale = s->qscale;
285 OPEN_READER(re, &s->gb);
287 // special case for first coefficient, no need to add second VLC table
288 UPDATE_CACHE(re, &s->gb);
289 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
290 level = (3 * qscale) >> 1;
291 level = (level - 1) | 1;
292 if (GET_CACHE(re, &s->gb) & 0x40000000)
296 SKIP_BITS(re, &s->gb, 2);
297 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
301 /* now quantify & encode AC coefficients */
303 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
308 level = ((level * 2 + 1) * qscale) >> 1;
309 level = (level - 1) | 1;
310 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
311 SKIP_BITS(re, &s->gb, 1);
314 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
315 UPDATE_CACHE(re, &s->gb);
316 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
318 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
319 } else if (level == 0) {
320 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
326 level = ((level * 2 + 1) * qscale) >> 1;
327 level = (level - 1) | 1;
330 level = ((level * 2 + 1) * qscale) >> 1;
331 level = (level - 1) | 1;
336 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
338 UPDATE_CACHE(re, &s->gb);
341 LAST_SKIP_BITS(re, &s->gb, 2);
342 CLOSE_READER(re, &s->gb);
344 s->block_last_index[n] = i;
349 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
351 int level, i, j, run;
352 RLTable *rl = &ff_rl_mpeg1;
353 uint8_t * const scantable = s->intra_scantable.permutated;
354 const uint16_t *quant_matrix;
355 const int qscale = s->qscale;
361 OPEN_READER(re, &s->gb);
364 quant_matrix = s->inter_matrix;
366 quant_matrix = s->chroma_inter_matrix;
368 // special case for first coefficient, no need to add second VLC table
369 UPDATE_CACHE(re, &s->gb);
370 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
371 level= (3 * qscale * quant_matrix[0]) >> 5;
372 if (GET_CACHE(re, &s->gb) & 0x40000000)
377 SKIP_BITS(re, &s->gb, 2);
378 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
382 /* now quantify & encode AC coefficients */
384 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
389 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
390 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
391 SKIP_BITS(re, &s->gb, 1);
394 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
395 UPDATE_CACHE(re, &s->gb);
396 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
401 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
404 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
408 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
414 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
416 UPDATE_CACHE(re, &s->gb);
419 LAST_SKIP_BITS(re, &s->gb, 2);
420 CLOSE_READER(re, &s->gb);
422 block[63] ^= (mismatch & 1);
424 s->block_last_index[n] = i;
429 * Note: this function can read out of range and crash for corrupt streams.
430 * Changing this would eat up any speed benefits it has.
431 * Do not use "fast" flag if you need the code to be robust.
433 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
434 int16_t *block, int n)
436 int level, i, j, run;
437 RLTable *rl = &ff_rl_mpeg1;
438 uint8_t * const scantable = s->intra_scantable.permutated;
439 const int qscale = s->qscale;
440 OPEN_READER(re, &s->gb);
443 // special case for first coefficient, no need to add second VLC table
444 UPDATE_CACHE(re, &s->gb);
445 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
446 level = (3 * qscale) >> 1;
447 if (GET_CACHE(re, &s->gb) & 0x40000000)
451 SKIP_BITS(re, &s->gb, 2);
452 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
456 /* now quantify & encode AC coefficients */
458 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
463 level = ((level * 2 + 1) * qscale) >> 1;
464 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
465 SKIP_BITS(re, &s->gb, 1);
468 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
469 UPDATE_CACHE(re, &s->gb);
470 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
475 level = ((-level * 2 + 1) * qscale) >> 1;
478 level = ((level * 2 + 1) * qscale) >> 1;
483 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
485 UPDATE_CACHE(re, &s->gb);
488 LAST_SKIP_BITS(re, &s->gb, 2);
489 CLOSE_READER(re, &s->gb);
490 s->block_last_index[n] = i;
495 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
497 int level, dc, diff, i, j, run;
500 uint8_t * const scantable = s->intra_scantable.permutated;
501 const uint16_t *quant_matrix;
502 const int qscale = s->qscale;
507 quant_matrix = s->intra_matrix;
510 quant_matrix = s->chroma_intra_matrix;
511 component = (n & 1) + 1;
513 diff = decode_dc(&s->gb, component);
516 dc = s->last_dc[component];
518 s->last_dc[component] = dc;
519 block[0] = dc << (3 - s->intra_dc_precision);
520 av_dlog(s->avctx, "dc=%d\n", block[0]);
521 mismatch = block[0] ^ 1;
523 if (s->intra_vlc_format)
529 OPEN_READER(re, &s->gb);
530 /* now quantify & encode AC coefficients */
532 UPDATE_CACHE(re, &s->gb);
533 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
537 } else if (level != 0) {
540 level = (level * qscale * quant_matrix[j]) >> 4;
541 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
542 LAST_SKIP_BITS(re, &s->gb, 1);
545 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
546 UPDATE_CACHE(re, &s->gb);
547 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
551 level = (-level * qscale * quant_matrix[j]) >> 4;
554 level = (level * qscale * quant_matrix[j]) >> 4;
558 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
565 CLOSE_READER(re, &s->gb);
567 block[63] ^= mismatch & 1;
569 s->block_last_index[n] = i;
574 * Note: this function can read out of range and crash for corrupt streams.
575 * Changing this would eat up any speed benefits it has.
576 * Do not use "fast" flag if you need the code to be robust.
578 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
580 int level, dc, diff, j, run;
583 uint8_t * scantable = s->intra_scantable.permutated;
584 const uint16_t *quant_matrix;
585 const int qscale = s->qscale;
589 quant_matrix = s->intra_matrix;
592 quant_matrix = s->chroma_intra_matrix;
593 component = (n & 1) + 1;
595 diff = decode_dc(&s->gb, component);
598 dc = s->last_dc[component];
600 s->last_dc[component] = dc;
601 block[0] = dc << (3 - s->intra_dc_precision);
602 if (s->intra_vlc_format)
608 OPEN_READER(re, &s->gb);
609 /* now quantify & encode AC coefficients */
611 UPDATE_CACHE(re, &s->gb);
612 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
616 } else if (level != 0) {
619 level = (level * qscale * quant_matrix[j]) >> 4;
620 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
621 LAST_SKIP_BITS(re, &s->gb, 1);
624 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
625 UPDATE_CACHE(re, &s->gb);
626 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
630 level = (-level * qscale * quant_matrix[j]) >> 4;
633 level = (level * qscale * quant_matrix[j]) >> 4;
639 CLOSE_READER(re, &s->gb);
642 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
646 /******************************************/
649 static inline int get_dmv(MpegEncContext *s)
651 if (get_bits1(&s->gb))
652 return 1 - (get_bits1(&s->gb) << 1);
657 static inline int get_qscale(MpegEncContext *s)
659 int qscale = get_bits(&s->gb, 5);
660 if (s->q_scale_type) {
661 return non_linear_qscale[qscale];
667 static void exchange_uv(MpegEncContext *s)
672 s->pblocks[4] = s->pblocks[5];
676 /* motion type (for MPEG-2) */
682 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
684 int i, j, k, cbp, val, mb_type, motion_type;
685 const int mb_block_count = 4 + (1 << s->chroma_format);
687 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
689 av_assert2(s->mb_skipped == 0);
691 if (s->mb_skip_run-- != 0) {
692 if (s->pict_type == AV_PICTURE_TYPE_P) {
694 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
699 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
701 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
702 if (IS_INTRA(mb_type)) {
703 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
706 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
707 mb_type | MB_TYPE_SKIP;
709 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
716 switch (s->pict_type) {
718 case AV_PICTURE_TYPE_I:
719 if (get_bits1(&s->gb) == 0) {
720 if (get_bits1(&s->gb) == 0) {
721 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
724 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
726 mb_type = MB_TYPE_INTRA;
729 case AV_PICTURE_TYPE_P:
730 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
732 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
735 mb_type = ptype2mb_type[mb_type];
737 case AV_PICTURE_TYPE_B:
738 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
740 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
743 mb_type = btype2mb_type[mb_type];
746 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
747 // motion_type = 0; /* avoid warning */
748 if (IS_INTRA(mb_type)) {
749 s->dsp.clear_blocks(s->block[0]);
751 if (!s->chroma_y_shift) {
752 s->dsp.clear_blocks(s->block[6]);
755 /* compute DCT type */
756 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
757 !s->frame_pred_frame_dct) {
758 s->interlaced_dct = get_bits1(&s->gb);
761 if (IS_QUANT(mb_type))
762 s->qscale = get_qscale(s);
764 if (s->concealment_motion_vectors) {
765 /* just parse them */
766 if (s->picture_structure != PICT_FRAME)
767 skip_bits1(&s->gb); /* field select */
769 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
770 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
771 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
772 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
774 skip_bits1(&s->gb); /* marker */
776 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
779 FF_DISABLE_DEPRECATION_WARNINGS
780 // if 1, we memcpy blocks in xvmcvideo
781 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
782 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
787 FF_ENABLE_DEPRECATION_WARNINGS
788 #endif /* FF_API_XVMC */
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);
1002 FF_DISABLE_DEPRECATION_WARNINGS
1003 //if 1, we memcpy blocks in xvmcvideo
1004 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1005 ff_xvmc_pack_pblocks(s, cbp);
1010 FF_ENABLE_DEPRECATION_WARNINGS
1011 #endif /* FF_API_XVMC */
1013 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1014 if (s->flags2 & CODEC_FLAG2_FAST) {
1015 for (i = 0; i < 6; i++) {
1017 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1019 s->block_last_index[i] = -1;
1024 cbp <<= 12-mb_block_count;
1026 for (i = 0; i < mb_block_count; i++) {
1027 if (cbp & (1 << 11)) {
1028 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1031 s->block_last_index[i] = -1;
1037 if (s->flags2 & CODEC_FLAG2_FAST) {
1038 for (i = 0; i < 6; i++) {
1040 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1042 s->block_last_index[i] = -1;
1047 for (i = 0; i < 6; i++) {
1049 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1052 s->block_last_index[i] = -1;
1059 for (i = 0; i < 12; i++)
1060 s->block_last_index[i] = -1;
1064 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1069 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1071 Mpeg1Context *s = avctx->priv_data;
1072 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1075 /* we need some permutation to store matrices,
1076 * until MPV_common_init() sets the real permutation. */
1077 for (i = 0; i < 64; i++)
1078 s2->dsp.idct_permutation[i]=i;
1080 ff_MPV_decode_defaults(s2);
1082 s->mpeg_enc_ctx.avctx = avctx;
1083 s->mpeg_enc_ctx.flags = avctx->flags;
1084 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1085 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1086 ff_mpeg12_init_vlcs();
1088 s->mpeg_enc_ctx_allocated = 0;
1089 s->mpeg_enc_ctx.picture_number = 0;
1090 s->repeat_field = 0;
1091 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1092 avctx->color_range = AVCOL_RANGE_MPEG;
1093 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1094 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1096 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1100 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1102 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1103 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1106 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1109 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1110 if (err) return err;
1112 if (!ctx->mpeg_enc_ctx_allocated)
1113 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1115 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1116 s->picture_number++;
1121 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1122 const uint8_t *new_perm)
1124 uint16_t temp_matrix[64];
1127 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1129 for (i = 0; i < 64; i++) {
1130 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1134 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1136 #if CONFIG_MPEG_XVMC_DECODER
1137 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1138 AV_PIX_FMT_XVMC_MPEG2_MC,
1140 #endif /* FF_API_XVMC */
1141 #if CONFIG_MPEG1_VDPAU_HWACCEL
1142 AV_PIX_FMT_VDPAU_MPEG1,
1149 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1151 #if CONFIG_MPEG_XVMC_DECODER
1152 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1153 AV_PIX_FMT_XVMC_MPEG2_MC,
1155 #endif /* FF_API_XVMC */
1156 #if CONFIG_MPEG2_VDPAU_HWACCEL
1157 AV_PIX_FMT_VDPAU_MPEG2,
1160 #if CONFIG_MPEG2_DXVA2_HWACCEL
1161 AV_PIX_FMT_DXVA2_VLD,
1163 #if CONFIG_MPEG2_VAAPI_HWACCEL
1164 AV_PIX_FMT_VAAPI_VLD,
1170 static inline int uses_vdpau(AVCodecContext *avctx) {
1171 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1174 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1176 Mpeg1Context *s1 = avctx->priv_data;
1177 MpegEncContext *s = &s1->mpeg_enc_ctx;
1179 if(s->chroma_format < 2) {
1180 return ff_thread_get_format(avctx,
1181 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1182 mpeg1_hwaccel_pixfmt_list_420 :
1183 mpeg2_hwaccel_pixfmt_list_420);
1184 } else if(s->chroma_format == 2)
1185 return AV_PIX_FMT_YUV422P;
1187 return AV_PIX_FMT_YUV444P;
1190 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1193 FF_DISABLE_DEPRECATION_WARNINGS
1194 if (avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_IDCT && avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_MC) {
1195 avctx->xvmc_acceleration = 0;
1196 } else if (!avctx->xvmc_acceleration) {
1197 avctx->xvmc_acceleration = 2;
1199 FF_ENABLE_DEPRECATION_WARNINGS
1200 #endif /* FF_API_XVMC */
1201 avctx->hwaccel = ff_find_hwaccel(avctx);
1202 // until then pix_fmt may be changed right after codec init
1204 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1208 avctx->hwaccel || uses_vdpau(avctx))
1209 if (avctx->idct_algo == FF_IDCT_AUTO)
1210 avctx->idct_algo = FF_IDCT_SIMPLE;
1213 /* Call this function when we know all parameters.
1214 * It may be called in different places for MPEG-1 and MPEG-2. */
1215 static int mpeg_decode_postinit(AVCodecContext *avctx)
1217 Mpeg1Context *s1 = avctx->priv_data;
1218 MpegEncContext *s = &s1->mpeg_enc_ctx;
1219 uint8_t old_permutation[64];
1222 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1223 avctx->coded_width != s->width ||
1224 avctx->coded_height != s->height ||
1225 s1->save_width != s->width ||
1226 s1->save_height != s->height ||
1227 s1->save_aspect_info != s->aspect_ratio_info ||
1228 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1232 if (s1->mpeg_enc_ctx_allocated) {
1233 ParseContext pc = s->parse_context;
1234 s->parse_context.buffer = 0;
1235 ff_MPV_common_end(s);
1236 s->parse_context = pc;
1237 s1->mpeg_enc_ctx_allocated = 0;
1240 if ((s->width == 0) || (s->height == 0))
1243 ret = ff_set_dimensions(avctx, s->width, s->height);
1247 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1248 avctx->rc_max_rate = s->bit_rate;
1249 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1250 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1251 avctx->bit_rate = s->bit_rate;
1253 s1->save_aspect_info = s->aspect_ratio_info;
1254 s1->save_width = s->width;
1255 s1->save_height = s->height;
1256 s1->save_progressive_seq = s->progressive_sequence;
1258 /* low_delay may be forced, in this case we will have B-frames
1259 * that behave like P-frames. */
1260 avctx->has_b_frames = !s->low_delay;
1262 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1264 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1265 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1267 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1268 avctx->ticks_per_frame=1;
1271 av_reduce(&s->avctx->time_base.den,
1272 &s->avctx->time_base.num,
1273 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1274 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1276 avctx->ticks_per_frame = 2;
1278 if (s->aspect_ratio_info > 1) {
1280 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1281 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1282 (AVRational) {s->width, s->height});
1284 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1285 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1286 // issue1613, 621, 562
1287 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1288 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1289 s->avctx->sample_aspect_ratio =
1290 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1291 (AVRational) {s->width, s->height});
1293 s->avctx->sample_aspect_ratio =
1294 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1295 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1296 //issue1613 4/3 16/9 -> 16/9
1297 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1298 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1299 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1300 av_dlog(avctx, "A %d/%d\n",
1301 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1302 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1303 s->avctx->sample_aspect_ratio.den);
1306 s->avctx->sample_aspect_ratio =
1307 ff_mpeg2_aspect[s->aspect_ratio_info];
1311 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1312 setup_hwaccel_for_pixfmt(avctx);
1314 /* Quantization matrices may need reordering
1315 * if DCT permutation is changed. */
1316 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1318 if (ff_MPV_common_init(s) < 0)
1321 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1322 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1323 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1324 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1326 s1->mpeg_enc_ctx_allocated = 1;
1331 static int mpeg1_decode_picture(AVCodecContext *avctx,
1332 const uint8_t *buf, int buf_size)
1334 Mpeg1Context *s1 = avctx->priv_data;
1335 MpegEncContext *s = &s1->mpeg_enc_ctx;
1336 int ref, f_code, vbv_delay;
1338 init_get_bits(&s->gb, buf, buf_size*8);
1340 ref = get_bits(&s->gb, 10); /* temporal ref */
1341 s->pict_type = get_bits(&s->gb, 3);
1342 if (s->pict_type == 0 || s->pict_type > 3)
1345 vbv_delay = get_bits(&s->gb, 16);
1346 s->vbv_delay = vbv_delay;
1347 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1348 s->full_pel[0] = get_bits1(&s->gb);
1349 f_code = get_bits(&s->gb, 3);
1350 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1353 s->mpeg_f_code[0][0] = f_code;
1354 s->mpeg_f_code[0][1] = f_code;
1356 if (s->pict_type == AV_PICTURE_TYPE_B) {
1357 s->full_pel[1] = get_bits1(&s->gb);
1358 f_code = get_bits(&s->gb, 3);
1359 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1362 s->mpeg_f_code[1][0] = f_code;
1363 s->mpeg_f_code[1][1] = f_code;
1365 s->current_picture.f.pict_type = s->pict_type;
1366 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1368 if (avctx->debug & FF_DEBUG_PICT_INFO)
1369 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1376 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1378 MpegEncContext *s= &s1->mpeg_enc_ctx;
1379 int horiz_size_ext, vert_size_ext;
1382 skip_bits(&s->gb, 1); /* profile and level esc*/
1383 s->avctx->profile = get_bits(&s->gb, 3);
1384 s->avctx->level = get_bits(&s->gb, 4);
1385 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1386 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1387 horiz_size_ext = get_bits(&s->gb, 2);
1388 vert_size_ext = get_bits(&s->gb, 2);
1389 s->width |= (horiz_size_ext << 12);
1390 s->height |= (vert_size_ext << 12);
1391 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1392 s->bit_rate += (bit_rate_ext << 18) * 400;
1393 skip_bits1(&s->gb); /* marker */
1394 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1396 s->low_delay = get_bits1(&s->gb);
1397 if (s->flags & CODEC_FLAG_LOW_DELAY)
1400 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1401 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1403 av_dlog(s->avctx, "sequence extension\n");
1404 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1406 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1407 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1408 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1412 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1414 MpegEncContext *s = &s1->mpeg_enc_ctx;
1415 int color_description, w, h;
1417 skip_bits(&s->gb, 3); /* video format */
1418 color_description = get_bits1(&s->gb);
1419 if (color_description) {
1420 s->avctx->color_primaries = get_bits(&s->gb, 8);
1421 s->avctx->color_trc = get_bits(&s->gb, 8);
1422 s->avctx->colorspace = get_bits(&s->gb, 8);
1424 w = get_bits(&s->gb, 14);
1425 skip_bits(&s->gb, 1); //marker
1426 h = get_bits(&s->gb, 14);
1427 // remaining 3 bits are zero padding
1429 s1->pan_scan.width = 16 * w;
1430 s1->pan_scan.height = 16 * h;
1432 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1433 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1436 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1438 MpegEncContext *s = &s1->mpeg_enc_ctx;
1442 if (s->progressive_sequence) {
1443 if (s->repeat_first_field) {
1445 if (s->top_field_first)
1449 if (s->picture_structure == PICT_FRAME) {
1451 if (s->repeat_first_field)
1455 for (i = 0; i < nofco; i++) {
1456 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1457 skip_bits(&s->gb, 1); // marker
1458 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1459 skip_bits(&s->gb, 1); // marker
1462 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1463 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1464 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1465 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1466 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1469 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1473 for (i = 0; i < 64; i++) {
1474 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1475 int v = get_bits(&s->gb, 8);
1477 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1480 if (intra && i == 0 && v != 8) {
1481 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1482 v = 8; // needed by pink.mpg / issue1046
1491 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1493 av_dlog(s->avctx, "matrix extension\n");
1495 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1496 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1497 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1498 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1501 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1503 MpegEncContext *s = &s1->mpeg_enc_ctx;
1505 s->full_pel[0] = s->full_pel[1] = 0;
1506 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1507 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1508 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1509 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1510 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1511 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1512 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1513 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1514 s->pict_type = AV_PICTURE_TYPE_I;
1516 s->pict_type = AV_PICTURE_TYPE_P;
1518 s->pict_type = AV_PICTURE_TYPE_B;
1519 s->current_picture.f.pict_type = s->pict_type;
1520 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1522 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1523 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1524 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1525 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1527 s->intra_dc_precision = get_bits(&s->gb, 2);
1528 s->picture_structure = get_bits(&s->gb, 2);
1529 s->top_field_first = get_bits1(&s->gb);
1530 s->frame_pred_frame_dct = get_bits1(&s->gb);
1531 s->concealment_motion_vectors = get_bits1(&s->gb);
1532 s->q_scale_type = get_bits1(&s->gb);
1533 s->intra_vlc_format = get_bits1(&s->gb);
1534 s->alternate_scan = get_bits1(&s->gb);
1535 s->repeat_first_field = get_bits1(&s->gb);
1536 s->chroma_420_type = get_bits1(&s->gb);
1537 s->progressive_frame = get_bits1(&s->gb);
1540 if (s->alternate_scan) {
1541 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1542 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1544 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1545 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1548 /* composite display not parsed */
1549 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1550 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1551 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1552 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1553 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1554 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1555 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1556 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1557 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1560 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1562 AVCodecContext *avctx = s->avctx;
1563 Mpeg1Context *s1 = (Mpeg1Context*)s;
1565 /* start frame decoding */
1566 if (s->first_field || s->picture_structure == PICT_FRAME) {
1567 AVFrameSideData *pan_scan;
1569 if (ff_MPV_frame_start(s, avctx) < 0)
1572 ff_mpeg_er_frame_start(s);
1574 /* first check if we must repeat the frame */
1575 s->current_picture_ptr->f.repeat_pict = 0;
1576 if (s->repeat_first_field) {
1577 if (s->progressive_sequence) {
1578 if (s->top_field_first)
1579 s->current_picture_ptr->f.repeat_pict = 4;
1581 s->current_picture_ptr->f.repeat_pict = 2;
1582 } else if (s->progressive_frame) {
1583 s->current_picture_ptr->f.repeat_pict = 1;
1587 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1588 AV_FRAME_DATA_PANSCAN,
1589 sizeof(s1->pan_scan));
1591 return AVERROR(ENOMEM);
1592 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1594 if (s1->a53_caption) {
1595 AVFrameSideData *sd = av_frame_new_side_data(
1596 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1597 s1->a53_caption_size);
1599 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1600 av_freep(&s1->a53_caption);
1602 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1603 ff_thread_finish_setup(avctx);
1604 } else { // second field
1607 if (!s->current_picture_ptr) {
1608 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1612 if (s->avctx->hwaccel &&
1613 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1614 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1615 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1618 for (i = 0; i < 4; i++) {
1619 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1620 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1621 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1626 if (avctx->hwaccel) {
1627 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1632 FF_DISABLE_DEPRECATION_WARNINGS
1633 // MPV_frame_start will call this function too,
1634 // but we need to call it on every field
1635 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1636 if (ff_xvmc_field_start(s, avctx) < 0)
1638 FF_ENABLE_DEPRECATION_WARNINGS
1639 #endif /* FF_API_XVMC */
1644 #define DECODE_SLICE_ERROR -1
1645 #define DECODE_SLICE_OK 0
1649 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1650 * @return DECODE_SLICE_ERROR if the slice is damaged,
1651 * DECODE_SLICE_OK if this slice is OK
1653 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1654 const uint8_t **buf, int buf_size)
1656 AVCodecContext *avctx = s->avctx;
1657 const int lowres = s->avctx->lowres;
1658 const int field_pic = s->picture_structure != PICT_FRAME;
1661 s->resync_mb_y = -1;
1663 av_assert0(mb_y < s->mb_height);
1665 init_get_bits(&s->gb, *buf, buf_size * 8);
1666 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1667 skip_bits(&s->gb, 3);
1669 ff_mpeg1_clean_buffers(s);
1670 s->interlaced_dct = 0;
1672 s->qscale = get_qscale(s);
1674 if (s->qscale == 0) {
1675 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1679 /* extra slice info */
1680 if (skip_1stop_8data_bits(&s->gb) < 0)
1681 return AVERROR_INVALIDDATA;
1685 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1688 while (get_bits_left(&s->gb) > 0) {
1689 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1690 MBINCR_VLC_BITS, 2);
1692 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1699 /* otherwise, stuffing, nothing to do */
1707 if (s->mb_x >= (unsigned)s->mb_width) {
1708 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1712 if (avctx->hwaccel) {
1713 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1714 int start_code = -1;
1715 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1716 if (buf_end < *buf + buf_size)
1719 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1720 return DECODE_SLICE_ERROR;
1722 return DECODE_SLICE_OK;
1725 s->resync_mb_x = s->mb_x;
1726 s->resync_mb_y = s->mb_y = mb_y;
1728 ff_init_block_index(s);
1730 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1731 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1732 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",
1733 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],
1734 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")),
1735 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1736 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1737 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1743 FF_DISABLE_DEPRECATION_WARNINGS
1744 // If 1, we memcpy blocks in xvmcvideo.
1745 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1746 ff_xvmc_init_block(s); // set s->block
1747 FF_ENABLE_DEPRECATION_WARNINGS
1748 #endif /* FF_API_XVMC */
1750 if (mpeg_decode_mb(s, s->block) < 0)
1753 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1754 const int wrap = s->b8_stride;
1755 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1756 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1757 int motion_x, motion_y, dir, i;
1759 for (i = 0; i < 2; i++) {
1760 for (dir = 0; dir < 2; dir++) {
1761 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1762 motion_x = motion_y = 0;
1763 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1764 motion_x = s->mv[dir][0][0];
1765 motion_y = s->mv[dir][0][1];
1766 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1767 motion_x = s->mv[dir][i][0];
1768 motion_y = s->mv[dir][i][1];
1771 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1772 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1773 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1774 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1775 s->current_picture.ref_index [dir][b8_xy ] =
1776 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1777 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1784 s->dest[0] += 16 >> lowres;
1785 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1786 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1788 ff_MPV_decode_mb(s, s->block);
1790 if (++s->mb_x >= s->mb_width) {
1791 const int mb_size = 16 >> s->avctx->lowres;
1793 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1794 ff_MPV_report_decode_progress(s);
1797 s->mb_y += 1 << field_pic;
1799 if (s->mb_y >= s->mb_height) {
1800 int left = get_bits_left(&s->gb);
1801 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1802 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1803 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1805 if (left >= 32 && !is_d10) {
1806 GetBitContext gb = s->gb;
1807 align_get_bits(&gb);
1808 if (show_bits(&gb, 24) == 0x060E2B) {
1809 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1814 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1815 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1816 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1822 ff_init_block_index(s);
1825 /* skip mb handling */
1826 if (s->mb_skip_run == -1) {
1827 /* read increment again */
1830 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1831 MBINCR_VLC_BITS, 2);
1833 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1838 s->mb_skip_run += 33;
1839 } else if (code == 35) {
1840 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1841 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1844 goto eos; /* end of slice */
1846 /* otherwise, stuffing, nothing to do */
1848 s->mb_skip_run += code;
1852 if (s->mb_skip_run) {
1854 if (s->pict_type == AV_PICTURE_TYPE_I) {
1855 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1861 for (i = 0; i < 12; i++)
1862 s->block_last_index[i] = -1;
1863 if (s->picture_structure == PICT_FRAME)
1864 s->mv_type = MV_TYPE_16X16;
1866 s->mv_type = MV_TYPE_FIELD;
1867 if (s->pict_type == AV_PICTURE_TYPE_P) {
1868 /* if P type, zero motion vector is implied */
1869 s->mv_dir = MV_DIR_FORWARD;
1870 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1871 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1872 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1873 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1875 /* if B type, reuse previous vectors and directions */
1876 s->mv[0][0][0] = s->last_mv[0][0][0];
1877 s->mv[0][0][1] = s->last_mv[0][0][1];
1878 s->mv[1][0][0] = s->last_mv[1][0][0];
1879 s->mv[1][0][1] = s->last_mv[1][0][1];
1884 eos: // end of slice
1885 *buf += (get_bits_count(&s->gb)-1)/8;
1886 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1890 static int slice_decode_thread(AVCodecContext *c, void *arg)
1892 MpegEncContext *s = *(void**)arg;
1893 const uint8_t *buf = s->gb.buffer;
1894 int mb_y = s->start_mb_y;
1895 const int field_pic = s->picture_structure != PICT_FRAME;
1897 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1900 uint32_t start_code;
1903 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1905 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1906 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1907 s->start_mb_y, s->end_mb_y, s->er.error_count);
1909 if (c->err_recognition & AV_EF_EXPLODE)
1911 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1912 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);
1914 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);
1917 if (s->mb_y == s->end_mb_y)
1921 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1922 mb_y= start_code - SLICE_MIN_START_CODE;
1923 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1924 mb_y += (*buf&0xE0)<<2;
1926 if (s->picture_structure == PICT_BOTTOM_FIELD)
1928 if (mb_y < 0 || mb_y >= s->end_mb_y)
1934 * Handle slice ends.
1935 * @return 1 if it seems to be the last slice
1937 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1939 Mpeg1Context *s1 = avctx->priv_data;
1940 MpegEncContext *s = &s1->mpeg_enc_ctx;
1942 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1945 if (s->avctx->hwaccel) {
1946 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1947 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1951 FF_DISABLE_DEPRECATION_WARNINGS
1952 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1953 ff_xvmc_field_end(s);
1954 FF_ENABLE_DEPRECATION_WARNINGS
1955 #endif /* FF_API_XVMC */
1957 /* end of slice reached */
1958 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1961 ff_er_frame_end(&s->er);
1963 ff_MPV_frame_end(s);
1965 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1966 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1969 ff_print_debug_info(s, s->current_picture_ptr, pict);
1970 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1972 if (avctx->active_thread_type & FF_THREAD_FRAME)
1973 s->picture_number++;
1974 /* latency of 1 frame for I- and P-frames */
1975 /* XXX: use another variable than picture_number */
1976 if (s->last_picture_ptr != NULL) {
1977 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1980 ff_print_debug_info(s, s->last_picture_ptr, pict);
1981 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1991 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1992 const uint8_t *buf, int buf_size)
1994 Mpeg1Context *s1 = avctx->priv_data;
1995 MpegEncContext *s = &s1->mpeg_enc_ctx;
1999 init_get_bits(&s->gb, buf, buf_size*8);
2001 width = get_bits(&s->gb, 12);
2002 height = get_bits(&s->gb, 12);
2003 if (width == 0 || height == 0) {
2004 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
2006 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2007 return AVERROR_INVALIDDATA;
2009 s->aspect_ratio_info = get_bits(&s->gb, 4);
2010 if (s->aspect_ratio_info == 0) {
2011 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2012 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2015 s->frame_rate_index = get_bits(&s->gb, 4);
2016 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2018 s->bit_rate = get_bits(&s->gb, 18) * 400;
2019 if (get_bits1(&s->gb) == 0) /* marker */
2024 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2025 skip_bits(&s->gb, 1);
2028 if (get_bits1(&s->gb)) {
2029 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2031 for (i = 0; i < 64; i++) {
2032 j = s->dsp.idct_permutation[i];
2033 v = ff_mpeg1_default_intra_matrix[i];
2034 s->intra_matrix[j] = v;
2035 s->chroma_intra_matrix[j] = v;
2038 if (get_bits1(&s->gb)) {
2039 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2041 for (i = 0; i < 64; i++) {
2042 int j = s->dsp.idct_permutation[i];
2043 v = ff_mpeg1_default_non_intra_matrix[i];
2044 s->inter_matrix[j] = v;
2045 s->chroma_inter_matrix[j] = v;
2049 if (show_bits(&s->gb, 23) != 0) {
2050 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2054 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2055 s->progressive_sequence = 1;
2056 s->progressive_frame = 1;
2057 s->picture_structure = PICT_FRAME;
2059 s->frame_pred_frame_dct = 1;
2060 s->chroma_format = 1;
2061 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2062 s->out_format = FMT_MPEG1;
2063 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2064 if (s->flags & CODEC_FLAG_LOW_DELAY)
2067 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2068 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2069 s->avctx->rc_buffer_size, s->bit_rate);
2074 static int vcr2_init_sequence(AVCodecContext *avctx)
2076 Mpeg1Context *s1 = avctx->priv_data;
2077 MpegEncContext *s = &s1->mpeg_enc_ctx;
2080 /* start new MPEG-1 context decoding */
2081 s->out_format = FMT_MPEG1;
2082 if (s1->mpeg_enc_ctx_allocated) {
2083 ff_MPV_common_end(s);
2084 s1->mpeg_enc_ctx_allocated = 0;
2086 s->width = avctx->coded_width;
2087 s->height = avctx->coded_height;
2088 avctx->has_b_frames = 0; // true?
2091 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2092 setup_hwaccel_for_pixfmt(avctx);
2094 if (ff_MPV_common_init(s) < 0)
2096 s1->mpeg_enc_ctx_allocated = 1;
2098 for (i = 0; i < 64; i++) {
2099 int j = s->dsp.idct_permutation[i];
2100 v = ff_mpeg1_default_intra_matrix[i];
2101 s->intra_matrix[j] = v;
2102 s->chroma_intra_matrix[j] = v;
2104 v = ff_mpeg1_default_non_intra_matrix[i];
2105 s->inter_matrix[j] = v;
2106 s->chroma_inter_matrix[j] = v;
2109 s->progressive_sequence = 1;
2110 s->progressive_frame = 1;
2111 s->picture_structure = PICT_FRAME;
2113 s->frame_pred_frame_dct = 1;
2114 s->chroma_format = 1;
2115 if (s->codec_tag == AV_RL32("BW10")) {
2116 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2118 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2119 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2121 s1->save_width = s->width;
2122 s1->save_height = s->height;
2123 s1->save_progressive_seq = s->progressive_sequence;
2128 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2129 const uint8_t *p, int buf_size)
2131 Mpeg1Context *s1 = avctx->priv_data;
2133 if (buf_size >= 6 &&
2134 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2135 p[4] == 3 && (p[5] & 0x40)) {
2136 /* extract A53 Part 4 CC data */
2137 int cc_count = p[5] & 0x1f;
2138 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2139 av_freep(&s1->a53_caption);
2140 s1->a53_caption_size = cc_count * 3;
2141 s1->a53_caption = av_malloc(s1->a53_caption_size);
2142 if (s1->a53_caption) {
2143 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2147 } else if (buf_size >= 11 &&
2148 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2149 /* extract DVD CC data */
2152 // There is a caption count field in the data, but it is often
2153 // incorect. So count the number of captions present.
2154 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2156 // Transform the DVD format into A53 Part 4 format
2158 av_freep(&s1->a53_caption);
2159 s1->a53_caption_size = cc_count * 6;
2160 s1->a53_caption = av_malloc(s1->a53_caption_size);
2161 if (s1->a53_caption) {
2162 uint8_t field1 = !!(p[4] & 0x80);
2163 uint8_t *cap = s1->a53_caption;
2165 for (i = 0; i < cc_count; i++) {
2166 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2169 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2182 static void mpeg_decode_user_data(AVCodecContext *avctx,
2183 const uint8_t *p, int buf_size)
2185 Mpeg1Context *s = avctx->priv_data;
2186 const uint8_t *buf_end = p + buf_size;
2191 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2195 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2196 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2198 av_log(avctx, AV_LOG_ERROR, "\n");*/
2201 /* we parse the DTG active format information */
2202 if (buf_end - p >= 5 &&
2203 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2211 if (buf_end - p < 1)
2213 avctx->dtg_active_format = p[0] & 0x0f;
2215 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2220 static void mpeg_decode_gop(AVCodecContext *avctx,
2221 const uint8_t *buf, int buf_size)
2223 Mpeg1Context *s1 = avctx->priv_data;
2224 MpegEncContext *s = &s1->mpeg_enc_ctx;
2228 init_get_bits(&s->gb, buf, buf_size*8);
2230 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2232 s->closed_gop = get_bits1(&s->gb);
2233 /*broken_link indicate that after editing the
2234 reference frames of the first B-Frames after GOP I-Frame
2235 are missing (open gop)*/
2236 broken_link = get_bits1(&s->gb);
2238 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2239 char tcbuf[AV_TIMECODE_STR_SIZE];
2240 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2241 av_log(s->avctx, AV_LOG_DEBUG,
2242 "GOP (%s) closed_gop=%d broken_link=%d\n",
2243 tcbuf, s->closed_gop, broken_link);
2247 static int decode_chunks(AVCodecContext *avctx,
2248 AVFrame *picture, int *got_output,
2249 const uint8_t *buf, int buf_size)
2251 Mpeg1Context *s = avctx->priv_data;
2252 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2253 const uint8_t *buf_ptr = buf;
2254 const uint8_t *buf_end = buf + buf_size;
2255 int ret, input_size;
2256 int last_code = 0, skip_frame = 0;
2257 int picture_start_code_seen = 0;
2260 /* find next start code */
2261 uint32_t start_code = -1;
2262 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2263 if (start_code > 0x1ff) {
2265 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2268 av_assert0(avctx->thread_count > 1);
2270 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2271 for (i = 0; i < s->slice_count; i++)
2272 s2->er.error_count += s2->thread_context[i]->er.error_count;
2275 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2276 && uses_vdpau(avctx))
2277 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2279 ret = slice_end(avctx, picture);
2283 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2289 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2290 return AVERROR_INVALIDDATA;
2292 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2295 input_size = buf_end - buf_ptr;
2297 if (avctx->debug & FF_DEBUG_STARTCODE) {
2298 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2301 /* prepare data for next start code */
2302 switch (start_code) {
2303 case SEQ_START_CODE:
2304 if (last_code == 0) {
2305 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2306 if(buf != avctx->extradata)
2309 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2310 if (avctx->err_recognition & AV_EF_EXPLODE)
2311 return AVERROR_INVALIDDATA;
2315 case PICTURE_START_CODE:
2316 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2317 /* If it's a frame picture, there can't be more than one picture header.
2318 Yet, it does happen and we need to handle it. */
2319 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2322 picture_start_code_seen = 1;
2324 if (s2->width <= 0 || s2->height <= 0) {
2325 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2326 s2->width, s2->height);
2327 return AVERROR_INVALIDDATA;
2331 s2->intra_dc_precision= 3;
2332 s2->intra_matrix[0]= 1;
2334 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2335 !avctx->hwaccel && s->slice_count) {
2338 avctx->execute(avctx, slice_decode_thread,
2339 s2->thread_context, NULL,
2340 s->slice_count, sizeof(void*));
2341 for (i = 0; i < s->slice_count; i++)
2342 s2->er.error_count += s2->thread_context[i]->er.error_count;
2345 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2346 ret = mpeg_decode_postinit(avctx);
2348 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2352 /* we have a complete image: we try to decompress it */
2353 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2355 s2->first_slice = 1;
2356 last_code = PICTURE_START_CODE;
2358 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2359 if (avctx->err_recognition & AV_EF_EXPLODE)
2360 return AVERROR_INVALIDDATA;
2363 case EXT_START_CODE:
2364 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2366 switch (get_bits(&s2->gb, 4)) {
2368 if (last_code == 0) {
2369 mpeg_decode_sequence_extension(s);
2371 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2372 if (avctx->err_recognition & AV_EF_EXPLODE)
2373 return AVERROR_INVALIDDATA;
2377 mpeg_decode_sequence_display_extension(s);
2380 mpeg_decode_quant_matrix_extension(s2);
2383 mpeg_decode_picture_display_extension(s);
2386 if (last_code == PICTURE_START_CODE) {
2387 mpeg_decode_picture_coding_extension(s);
2389 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2390 if (avctx->err_recognition & AV_EF_EXPLODE)
2391 return AVERROR_INVALIDDATA;
2396 case USER_START_CODE:
2397 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2399 case GOP_START_CODE:
2400 if (last_code == 0) {
2402 mpeg_decode_gop(avctx, buf_ptr, input_size);
2405 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2406 if (avctx->err_recognition & AV_EF_EXPLODE)
2407 return AVERROR_INVALIDDATA;
2411 if (start_code >= SLICE_MIN_START_CODE &&
2412 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2414 if (s2->progressive_sequence && !s2->progressive_frame) {
2415 s2->progressive_frame = 1;
2416 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2419 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2420 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2421 s2->picture_structure = PICT_FRAME;
2424 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2425 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2428 if (s2->picture_structure == PICT_FRAME) {
2429 s2->first_field = 0;
2430 s2->v_edge_pos = 16 * s2->mb_height;
2432 s2->first_field ^= 1;
2433 s2->v_edge_pos = 8 * s2->mb_height;
2434 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2437 if (start_code >= SLICE_MIN_START_CODE &&
2438 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2439 const int field_pic = s2->picture_structure != PICT_FRAME;
2440 int mb_y = start_code - SLICE_MIN_START_CODE;
2441 last_code = SLICE_MIN_START_CODE;
2442 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2443 mb_y += (*buf_ptr&0xE0)<<2;
2446 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2449 if (buf_end - buf_ptr < 2) {
2450 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2451 return AVERROR_INVALIDDATA;
2454 if (mb_y >= s2->mb_height) {
2455 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2459 if (s2->last_picture_ptr == NULL) {
2460 /* Skip B-frames if we do not have reference frames and gop is not closed */
2461 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2462 if (!s2->closed_gop) {
2468 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2470 if (s2->next_picture_ptr == NULL) {
2471 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2472 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2477 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2478 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2479 avctx->skip_frame >= AVDISCARD_ALL) {
2484 if (!s->mpeg_enc_ctx_allocated)
2487 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2488 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2492 if (!s2->pict_type) {
2493 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2494 if (avctx->err_recognition & AV_EF_EXPLODE)
2495 return AVERROR_INVALIDDATA;
2499 if (s2->first_slice) {
2501 s2->first_slice = 0;
2502 if (mpeg_field_start(s2, buf, buf_size) < 0)
2505 if (!s2->current_picture_ptr) {
2506 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2507 return AVERROR_INVALIDDATA;
2510 if (uses_vdpau(avctx)) {
2515 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2517 int threshold = (s2->mb_height * s->slice_count +
2518 s2->slice_context_count / 2) /
2519 s2->slice_context_count;
2520 av_assert0(avctx->thread_count > 1);
2521 if (threshold <= mb_y) {
2522 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2524 thread_context->start_mb_y = mb_y;
2525 thread_context->end_mb_y = s2->mb_height;
2526 if (s->slice_count) {
2527 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2528 ret = ff_update_duplicate_context(thread_context,
2533 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2536 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2538 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2542 if (avctx->err_recognition & AV_EF_EXPLODE)
2544 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2545 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);
2547 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);
2556 static int mpeg_decode_frame(AVCodecContext *avctx,
2557 void *data, int *got_output,
2560 const uint8_t *buf = avpkt->data;
2562 int buf_size = avpkt->size;
2563 Mpeg1Context *s = avctx->priv_data;
2564 AVFrame *picture = data;
2565 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2566 av_dlog(avctx, "fill_buffer\n");
2568 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2569 /* special case for last picture */
2570 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2571 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2575 s2->next_picture_ptr = NULL;
2582 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2583 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2585 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2589 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2590 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2591 || s2->codec_tag == AV_RL32("BW10")
2593 vcr2_init_sequence(avctx);
2597 if (avctx->extradata && !s->extradata_decoded) {
2598 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2600 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2603 s->extradata_decoded = 1;
2604 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2605 s2->current_picture_ptr = NULL;
2610 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2611 if (ret<0 || *got_output)
2612 s2->current_picture_ptr = NULL;
2618 static void flush(AVCodecContext *avctx)
2620 Mpeg1Context *s = avctx->priv_data;
2624 ff_mpeg_flush(avctx);
2627 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2629 Mpeg1Context *s = avctx->priv_data;
2631 if (s->mpeg_enc_ctx_allocated)
2632 ff_MPV_common_end(&s->mpeg_enc_ctx);
2633 av_freep(&s->a53_caption);
2637 static const AVProfile mpeg2_video_profiles[] = {
2638 { FF_PROFILE_MPEG2_422, "4:2:2" },
2639 { FF_PROFILE_MPEG2_HIGH, "High" },
2640 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2641 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2642 { FF_PROFILE_MPEG2_MAIN, "Main" },
2643 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2644 { FF_PROFILE_RESERVED, "Reserved" },
2645 { FF_PROFILE_RESERVED, "Reserved" },
2646 { FF_PROFILE_UNKNOWN },
2650 AVCodec ff_mpeg1video_decoder = {
2651 .name = "mpeg1video",
2652 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2653 .type = AVMEDIA_TYPE_VIDEO,
2654 .id = AV_CODEC_ID_MPEG1VIDEO,
2655 .priv_data_size = sizeof(Mpeg1Context),
2656 .init = mpeg_decode_init,
2657 .close = mpeg_decode_end,
2658 .decode = mpeg_decode_frame,
2659 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2660 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2661 CODEC_CAP_SLICE_THREADS,
2664 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2667 AVCodec ff_mpeg2video_decoder = {
2668 .name = "mpeg2video",
2669 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2670 .type = AVMEDIA_TYPE_VIDEO,
2671 .id = AV_CODEC_ID_MPEG2VIDEO,
2672 .priv_data_size = sizeof(Mpeg1Context),
2673 .init = mpeg_decode_init,
2674 .close = mpeg_decode_end,
2675 .decode = mpeg_decode_frame,
2676 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2677 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2678 CODEC_CAP_SLICE_THREADS,
2681 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2685 AVCodec ff_mpegvideo_decoder = {
2686 .name = "mpegvideo",
2687 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2688 .type = AVMEDIA_TYPE_VIDEO,
2689 .id = AV_CODEC_ID_MPEG2VIDEO,
2690 .priv_data_size = sizeof(Mpeg1Context),
2691 .init = mpeg_decode_init,
2692 .close = mpeg_decode_end,
2693 .decode = mpeg_decode_frame,
2694 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2700 #if CONFIG_MPEG_XVMC_DECODER
2701 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2703 if (avctx->active_thread_type & FF_THREAD_SLICE)
2705 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2707 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2708 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2710 mpeg_decode_init(avctx);
2712 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2713 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2718 AVCodec ff_mpeg_xvmc_decoder = {
2719 .name = "mpegvideo_xvmc",
2720 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2721 .type = AVMEDIA_TYPE_VIDEO,
2722 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2723 .priv_data_size = sizeof(Mpeg1Context),
2724 .init = mpeg_mc_decode_init,
2725 .close = mpeg_decode_end,
2726 .decode = mpeg_decode_frame,
2727 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2728 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2733 #endif /* FF_API_XVMC */
2735 #if CONFIG_MPEG_VDPAU_DECODER
2736 AVCodec ff_mpeg_vdpau_decoder = {
2737 .name = "mpegvideo_vdpau",
2738 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2739 .type = AVMEDIA_TYPE_VIDEO,
2740 .id = AV_CODEC_ID_MPEG2VIDEO,
2741 .priv_data_size = sizeof(Mpeg1Context),
2742 .init = mpeg_decode_init,
2743 .close = mpeg_decode_end,
2744 .decode = mpeg_decode_frame,
2745 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2746 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2751 #if CONFIG_MPEG1_VDPAU_DECODER
2752 AVCodec ff_mpeg1_vdpau_decoder = {
2753 .name = "mpeg1video_vdpau",
2754 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2755 .type = AVMEDIA_TYPE_VIDEO,
2756 .id = AV_CODEC_ID_MPEG1VIDEO,
2757 .priv_data_size = sizeof(Mpeg1Context),
2758 .init = mpeg_decode_init,
2759 .close = mpeg_decode_end,
2760 .decode = mpeg_decode_frame,
2761 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2762 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,