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);
477 check_scantable_index(s, i);
479 level = ((level * 2 + 1) * qscale) >> 1;
480 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
481 SKIP_BITS(re, &s->gb, 1);
484 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
485 UPDATE_CACHE(re, &s->gb);
486 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
489 check_scantable_index(s, i);
492 level = ((-level * 2 + 1) * qscale) >> 1;
495 level = ((level * 2 + 1) * qscale) >> 1;
500 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
503 UPDATE_CACHE(re, &s->gb);
506 LAST_SKIP_BITS(re, &s->gb, 2);
507 CLOSE_READER(re, &s->gb);
508 s->block_last_index[n] = i;
513 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
515 int level, dc, diff, i, j, run;
518 uint8_t * const scantable = s->intra_scantable.permutated;
519 const uint16_t *quant_matrix;
520 const int qscale = s->qscale;
525 quant_matrix = s->intra_matrix;
528 quant_matrix = s->chroma_intra_matrix;
529 component = (n & 1) + 1;
531 diff = decode_dc(&s->gb, component);
534 dc = s->last_dc[component];
536 s->last_dc[component] = dc;
537 block[0] = dc << (3 - s->intra_dc_precision);
538 av_dlog(s->avctx, "dc=%d\n", block[0]);
539 mismatch = block[0] ^ 1;
541 if (s->intra_vlc_format)
547 OPEN_READER(re, &s->gb);
548 /* now quantify & encode AC coefficients */
550 UPDATE_CACHE(re, &s->gb);
551 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
555 } else if (level != 0) {
557 check_scantable_index(s, i);
559 level = (level * qscale * quant_matrix[j]) >> 4;
560 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
561 LAST_SKIP_BITS(re, &s->gb, 1);
564 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
565 UPDATE_CACHE(re, &s->gb);
566 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
568 check_scantable_index(s, i);
571 level = (-level * qscale * quant_matrix[j]) >> 4;
574 level = (level * qscale * quant_matrix[j]) >> 4;
581 CLOSE_READER(re, &s->gb);
583 block[63] ^= mismatch & 1;
585 s->block_last_index[n] = i;
590 * Note: this function can read out of range and crash for corrupt streams.
591 * Changing this would eat up any speed benefits it has.
592 * Do not use "fast" flag if you need the code to be robust.
594 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
596 int level, dc, diff, i, j, run;
599 uint8_t * const scantable = s->intra_scantable.permutated;
600 const uint16_t *quant_matrix;
601 const int qscale = s->qscale;
605 quant_matrix = s->intra_matrix;
608 quant_matrix = s->chroma_intra_matrix;
609 component = (n & 1) + 1;
611 diff = decode_dc(&s->gb, component);
614 dc = s->last_dc[component];
616 s->last_dc[component] = dc;
617 block[0] = dc << (3 - s->intra_dc_precision);
619 if (s->intra_vlc_format)
625 OPEN_READER(re, &s->gb);
626 /* now quantify & encode AC coefficients */
628 UPDATE_CACHE(re, &s->gb);
629 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
633 } else if (level != 0) {
635 check_scantable_index(s, i);
637 level = (level * qscale * quant_matrix[j]) >> 4;
638 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
639 LAST_SKIP_BITS(re, &s->gb, 1);
642 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
643 UPDATE_CACHE(re, &s->gb);
644 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
646 check_scantable_index(s, i);
649 level = (-level * qscale * quant_matrix[j]) >> 4;
652 level = (level * qscale * quant_matrix[j]) >> 4;
658 CLOSE_READER(re, &s->gb);
661 s->block_last_index[n] = i;
665 /******************************************/
668 static inline int get_dmv(MpegEncContext *s)
670 if (get_bits1(&s->gb))
671 return 1 - (get_bits1(&s->gb) << 1);
676 static inline int get_qscale(MpegEncContext *s)
678 int qscale = get_bits(&s->gb, 5);
679 if (s->q_scale_type) {
680 return non_linear_qscale[qscale];
687 /* motion type (for MPEG-2) */
693 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
695 int i, j, k, cbp, val, mb_type, motion_type;
696 const int mb_block_count = 4 + (1 << s->chroma_format);
698 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
700 av_assert2(s->mb_skipped == 0);
702 if (s->mb_skip_run-- != 0) {
703 if (s->pict_type == AV_PICTURE_TYPE_P) {
705 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
710 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
712 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
713 if (IS_INTRA(mb_type)) {
714 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
717 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
718 mb_type | MB_TYPE_SKIP;
720 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
727 switch (s->pict_type) {
729 case AV_PICTURE_TYPE_I:
730 if (get_bits1(&s->gb) == 0) {
731 if (get_bits1(&s->gb) == 0) {
732 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
735 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
737 mb_type = MB_TYPE_INTRA;
740 case AV_PICTURE_TYPE_P:
741 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
743 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
746 mb_type = ptype2mb_type[mb_type];
748 case AV_PICTURE_TYPE_B:
749 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
751 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
754 mb_type = btype2mb_type[mb_type];
757 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
758 // motion_type = 0; /* avoid warning */
759 if (IS_INTRA(mb_type)) {
760 s->dsp.clear_blocks(s->block[0]);
762 if (!s->chroma_y_shift) {
763 s->dsp.clear_blocks(s->block[6]);
766 /* compute DCT type */
767 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
768 !s->frame_pred_frame_dct) {
769 s->interlaced_dct = get_bits1(&s->gb);
772 if (IS_QUANT(mb_type))
773 s->qscale = get_qscale(s);
775 if (s->concealment_motion_vectors) {
776 /* just parse them */
777 if (s->picture_structure != PICT_FRAME)
778 skip_bits1(&s->gb); /* field select */
780 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
781 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
782 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
783 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
785 skip_bits1(&s->gb); /* marker */
787 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
789 // if 1, we memcpy blocks in xvmcvideo
790 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
791 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
794 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
795 if (s->flags2 & CODEC_FLAG2_FAST) {
796 for (i = 0; i < 6; i++) {
797 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
800 for (i = 0; i < mb_block_count; i++) {
801 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
806 for (i = 0; i < 6; i++) {
807 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
812 if (mb_type & MB_TYPE_ZERO_MV) {
813 av_assert2(mb_type & MB_TYPE_CBP);
815 s->mv_dir = MV_DIR_FORWARD;
816 if (s->picture_structure == PICT_FRAME) {
817 if (s->picture_structure == PICT_FRAME
818 && !s->frame_pred_frame_dct)
819 s->interlaced_dct = get_bits1(&s->gb);
820 s->mv_type = MV_TYPE_16X16;
822 s->mv_type = MV_TYPE_FIELD;
823 mb_type |= MB_TYPE_INTERLACED;
824 s->field_select[0][0] = s->picture_structure - 1;
827 if (IS_QUANT(mb_type))
828 s->qscale = get_qscale(s);
830 s->last_mv[0][0][0] = 0;
831 s->last_mv[0][0][1] = 0;
832 s->last_mv[0][1][0] = 0;
833 s->last_mv[0][1][1] = 0;
837 av_assert2(mb_type & MB_TYPE_L0L1);
838 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
839 /* get additional motion vector type */
840 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
841 motion_type = MT_FRAME;
843 motion_type = get_bits(&s->gb, 2);
844 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
845 s->interlaced_dct = get_bits1(&s->gb);
848 if (IS_QUANT(mb_type))
849 s->qscale = get_qscale(s);
852 s->mv_dir = (mb_type >> 13) & 3;
853 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
854 switch (motion_type) {
855 case MT_FRAME: /* or MT_16X8 */
856 if (s->picture_structure == PICT_FRAME) {
857 mb_type |= MB_TYPE_16x16;
858 s->mv_type = MV_TYPE_16X16;
859 for (i = 0; i < 2; i++) {
860 if (USES_LIST(mb_type, i)) {
862 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
863 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
864 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
865 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
866 /* full_pel: only for MPEG-1 */
867 if (s->full_pel[i]) {
868 s->mv[i][0][0] <<= 1;
869 s->mv[i][0][1] <<= 1;
874 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
875 s->mv_type = MV_TYPE_16X8;
876 for (i = 0; i < 2; i++) {
877 if (USES_LIST(mb_type, i)) {
879 for (j = 0; j < 2; j++) {
880 s->field_select[i][j] = get_bits1(&s->gb);
881 for (k = 0; k < 2; k++) {
882 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
883 s->last_mv[i][j][k]);
884 s->last_mv[i][j][k] = val;
885 s->mv[i][j][k] = val;
893 s->mv_type = MV_TYPE_FIELD;
894 if (s->picture_structure == PICT_FRAME) {
895 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
896 for (i = 0; i < 2; i++) {
897 if (USES_LIST(mb_type, i)) {
898 for (j = 0; j < 2; j++) {
899 s->field_select[i][j] = get_bits1(&s->gb);
900 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
901 s->last_mv[i][j][0]);
902 s->last_mv[i][j][0] = val;
903 s->mv[i][j][0] = val;
904 av_dlog(s->avctx, "fmx=%d\n", val);
905 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
906 s->last_mv[i][j][1] >> 1);
907 s->last_mv[i][j][1] = val << 1;
908 s->mv[i][j][1] = val;
909 av_dlog(s->avctx, "fmy=%d\n", val);
914 av_assert0(!s->progressive_sequence);
915 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
916 for (i = 0; i < 2; i++) {
917 if (USES_LIST(mb_type, i)) {
918 s->field_select[i][0] = get_bits1(&s->gb);
919 for (k = 0; k < 2; k++) {
920 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
921 s->last_mv[i][0][k]);
922 s->last_mv[i][0][k] = val;
923 s->last_mv[i][1][k] = val;
924 s->mv[i][0][k] = val;
931 if(s->progressive_sequence){
932 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
935 s->mv_type = MV_TYPE_DMV;
936 for (i = 0; i < 2; i++) {
937 if (USES_LIST(mb_type, i)) {
938 int dmx, dmy, mx, my, m;
939 const int my_shift = s->picture_structure == PICT_FRAME;
941 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
942 s->last_mv[i][0][0]);
943 s->last_mv[i][0][0] = mx;
944 s->last_mv[i][1][0] = mx;
946 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
947 s->last_mv[i][0][1] >> my_shift);
951 s->last_mv[i][0][1] = my << my_shift;
952 s->last_mv[i][1][1] = my << my_shift;
956 s->mv[i][1][0] = mx; // not used
957 s->mv[i][1][1] = my; // not used
959 if (s->picture_structure == PICT_FRAME) {
960 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
962 // m = 1 + 2 * s->top_field_first;
963 m = s->top_field_first ? 1 : 3;
965 /* top -> top pred */
966 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
967 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
969 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
970 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
972 mb_type |= MB_TYPE_16x16;
974 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
975 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
976 if (s->picture_structure == PICT_TOP_FIELD)
985 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
991 if (HAS_CBP(mb_type)) {
992 s->dsp.clear_blocks(s->block[0]);
994 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
995 if (mb_block_count > 6) {
996 cbp <<= mb_block_count - 6;
997 cbp |= get_bits(&s->gb, mb_block_count - 6);
998 s->dsp.clear_blocks(s->block[6]);
1001 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1005 //if 1, we memcpy blocks in xvmcvideo
1006 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks) {
1007 ff_xvmc_pack_pblocks(s, cbp);
1010 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1011 if (s->flags2 & CODEC_FLAG2_FAST) {
1012 for (i = 0; i < 6; i++) {
1014 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1016 s->block_last_index[i] = -1;
1021 cbp <<= 12-mb_block_count;
1023 for (i = 0; i < mb_block_count; i++) {
1024 if (cbp & (1 << 11)) {
1025 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1028 s->block_last_index[i] = -1;
1034 if (s->flags2 & CODEC_FLAG2_FAST) {
1035 for (i = 0; i < 6; i++) {
1037 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1039 s->block_last_index[i] = -1;
1044 for (i = 0; i < 6; i++) {
1046 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1049 s->block_last_index[i] = -1;
1056 for (i = 0; i < 12; i++)
1057 s->block_last_index[i] = -1;
1061 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1066 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1068 Mpeg1Context *s = avctx->priv_data;
1069 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1072 /* we need some permutation to store matrices,
1073 * until MPV_common_init() sets the real permutation. */
1074 for (i = 0; i < 64; i++)
1075 s2->dsp.idct_permutation[i]=i;
1077 ff_MPV_decode_defaults(s2);
1079 s->mpeg_enc_ctx.avctx = avctx;
1080 s->mpeg_enc_ctx.flags = avctx->flags;
1081 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1082 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1083 ff_mpeg12_init_vlcs();
1085 s->mpeg_enc_ctx_allocated = 0;
1086 s->mpeg_enc_ctx.picture_number = 0;
1087 s->repeat_field = 0;
1088 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1089 avctx->color_range = AVCOL_RANGE_MPEG;
1090 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1091 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1093 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1097 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1099 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1100 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1103 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1106 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1107 if (err) return err;
1109 if (!ctx->mpeg_enc_ctx_allocated)
1110 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1112 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1113 s->picture_number++;
1118 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1119 const uint8_t *new_perm)
1121 uint16_t temp_matrix[64];
1124 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1126 for (i = 0; i < 64; i++) {
1127 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1131 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1132 #if CONFIG_MPEG1_XVMC_HWACCEL
1135 #if CONFIG_MPEG1_VDPAU_HWACCEL
1136 AV_PIX_FMT_VDPAU_MPEG1,
1143 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1144 #if CONFIG_MPEG2_XVMC_HWACCEL
1147 #if CONFIG_MPEG2_VDPAU_HWACCEL
1148 AV_PIX_FMT_VDPAU_MPEG2,
1151 #if CONFIG_MPEG2_DXVA2_HWACCEL
1152 AV_PIX_FMT_DXVA2_VLD,
1154 #if CONFIG_MPEG2_VAAPI_HWACCEL
1155 AV_PIX_FMT_VAAPI_VLD,
1161 static inline int uses_vdpau(AVCodecContext *avctx) {
1162 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1165 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1167 Mpeg1Context *s1 = avctx->priv_data;
1168 MpegEncContext *s = &s1->mpeg_enc_ctx;
1170 if(s->chroma_format < 2) {
1171 return ff_thread_get_format(avctx,
1172 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1173 mpeg1_hwaccel_pixfmt_list_420 :
1174 mpeg2_hwaccel_pixfmt_list_420);
1175 } else if(s->chroma_format == 2)
1176 return AV_PIX_FMT_YUV422P;
1178 return AV_PIX_FMT_YUV444P;
1181 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1183 avctx->hwaccel = ff_find_hwaccel(avctx);
1184 // until then pix_fmt may be changed right after codec init
1185 if (avctx->hwaccel || uses_vdpau(avctx))
1186 if (avctx->idct_algo == FF_IDCT_AUTO)
1187 avctx->idct_algo = FF_IDCT_SIMPLE;
1189 if (avctx->hwaccel && avctx->pix_fmt == AV_PIX_FMT_XVMC) {
1190 Mpeg1Context *s1 = avctx->priv_data;
1191 MpegEncContext *s = &s1->mpeg_enc_ctx;
1193 s->pack_pblocks = 1;
1195 avctx->xvmc_acceleration = 2;
1196 #endif /* FF_API_XVMC */
1200 /* Call this function when we know all parameters.
1201 * It may be called in different places for MPEG-1 and MPEG-2. */
1202 static int mpeg_decode_postinit(AVCodecContext *avctx)
1204 Mpeg1Context *s1 = avctx->priv_data;
1205 MpegEncContext *s = &s1->mpeg_enc_ctx;
1206 uint8_t old_permutation[64];
1209 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1210 avctx->coded_width != s->width ||
1211 avctx->coded_height != s->height ||
1212 s1->save_width != s->width ||
1213 s1->save_height != s->height ||
1214 s1->save_aspect_info != s->aspect_ratio_info ||
1215 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1219 if (s1->mpeg_enc_ctx_allocated) {
1220 ParseContext pc = s->parse_context;
1221 s->parse_context.buffer = 0;
1222 ff_MPV_common_end(s);
1223 s->parse_context = pc;
1224 s1->mpeg_enc_ctx_allocated = 0;
1227 if ((s->width == 0) || (s->height == 0))
1230 ret = ff_set_dimensions(avctx, s->width, s->height);
1234 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1235 avctx->rc_max_rate = s->bit_rate;
1236 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1237 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1238 avctx->bit_rate = s->bit_rate;
1240 s1->save_aspect_info = s->aspect_ratio_info;
1241 s1->save_width = s->width;
1242 s1->save_height = s->height;
1243 s1->save_progressive_seq = s->progressive_sequence;
1245 /* low_delay may be forced, in this case we will have B-frames
1246 * that behave like P-frames. */
1247 avctx->has_b_frames = !s->low_delay;
1249 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1251 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1252 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1254 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1255 avctx->ticks_per_frame=1;
1258 av_reduce(&s->avctx->time_base.den,
1259 &s->avctx->time_base.num,
1260 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1261 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1263 avctx->ticks_per_frame = 2;
1265 if (s->aspect_ratio_info > 1) {
1267 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1268 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1269 (AVRational) {s->width, s->height});
1271 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1272 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1273 // issue1613, 621, 562
1274 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1275 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1276 s->avctx->sample_aspect_ratio =
1277 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1278 (AVRational) {s->width, s->height});
1280 s->avctx->sample_aspect_ratio =
1281 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1282 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1283 //issue1613 4/3 16/9 -> 16/9
1284 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1285 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1286 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1287 av_dlog(avctx, "A %d/%d\n",
1288 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1289 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1290 s->avctx->sample_aspect_ratio.den);
1293 s->avctx->sample_aspect_ratio =
1294 ff_mpeg2_aspect[s->aspect_ratio_info];
1298 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1299 setup_hwaccel_for_pixfmt(avctx);
1301 /* Quantization matrices may need reordering
1302 * if DCT permutation is changed. */
1303 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1305 if (ff_MPV_common_init(s) < 0)
1308 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1309 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1310 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1311 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1313 s1->mpeg_enc_ctx_allocated = 1;
1318 static int mpeg1_decode_picture(AVCodecContext *avctx,
1319 const uint8_t *buf, int buf_size)
1321 Mpeg1Context *s1 = avctx->priv_data;
1322 MpegEncContext *s = &s1->mpeg_enc_ctx;
1323 int ref, f_code, vbv_delay;
1325 init_get_bits(&s->gb, buf, buf_size*8);
1327 ref = get_bits(&s->gb, 10); /* temporal ref */
1328 s->pict_type = get_bits(&s->gb, 3);
1329 if (s->pict_type == 0 || s->pict_type > 3)
1332 vbv_delay = get_bits(&s->gb, 16);
1333 s->vbv_delay = vbv_delay;
1334 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1335 s->full_pel[0] = get_bits1(&s->gb);
1336 f_code = get_bits(&s->gb, 3);
1337 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1340 s->mpeg_f_code[0][0] = f_code;
1341 s->mpeg_f_code[0][1] = f_code;
1343 if (s->pict_type == AV_PICTURE_TYPE_B) {
1344 s->full_pel[1] = get_bits1(&s->gb);
1345 f_code = get_bits(&s->gb, 3);
1346 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1349 s->mpeg_f_code[1][0] = f_code;
1350 s->mpeg_f_code[1][1] = f_code;
1352 s->current_picture.f.pict_type = s->pict_type;
1353 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1355 if (avctx->debug & FF_DEBUG_PICT_INFO)
1356 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1363 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1365 MpegEncContext *s= &s1->mpeg_enc_ctx;
1366 int horiz_size_ext, vert_size_ext;
1369 skip_bits(&s->gb, 1); /* profile and level esc*/
1370 s->avctx->profile = get_bits(&s->gb, 3);
1371 s->avctx->level = get_bits(&s->gb, 4);
1372 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1373 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1374 horiz_size_ext = get_bits(&s->gb, 2);
1375 vert_size_ext = get_bits(&s->gb, 2);
1376 s->width |= (horiz_size_ext << 12);
1377 s->height |= (vert_size_ext << 12);
1378 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1379 s->bit_rate += (bit_rate_ext << 18) * 400;
1380 skip_bits1(&s->gb); /* marker */
1381 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1383 s->low_delay = get_bits1(&s->gb);
1384 if (s->flags & CODEC_FLAG_LOW_DELAY)
1387 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1388 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1390 av_dlog(s->avctx, "sequence extension\n");
1391 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1393 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1394 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1395 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1399 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1401 MpegEncContext *s = &s1->mpeg_enc_ctx;
1402 int color_description, w, h;
1404 skip_bits(&s->gb, 3); /* video format */
1405 color_description = get_bits1(&s->gb);
1406 if (color_description) {
1407 s->avctx->color_primaries = get_bits(&s->gb, 8);
1408 s->avctx->color_trc = get_bits(&s->gb, 8);
1409 s->avctx->colorspace = get_bits(&s->gb, 8);
1411 w = get_bits(&s->gb, 14);
1412 skip_bits(&s->gb, 1); //marker
1413 h = get_bits(&s->gb, 14);
1414 // remaining 3 bits are zero padding
1416 s1->pan_scan.width = 16 * w;
1417 s1->pan_scan.height = 16 * h;
1419 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1420 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1423 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1425 MpegEncContext *s = &s1->mpeg_enc_ctx;
1429 if (s->progressive_sequence) {
1430 if (s->repeat_first_field) {
1432 if (s->top_field_first)
1436 if (s->picture_structure == PICT_FRAME) {
1438 if (s->repeat_first_field)
1442 for (i = 0; i < nofco; i++) {
1443 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1444 skip_bits(&s->gb, 1); // marker
1445 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1446 skip_bits(&s->gb, 1); // marker
1449 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1450 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1451 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1452 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1453 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1456 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1460 for (i = 0; i < 64; i++) {
1461 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1462 int v = get_bits(&s->gb, 8);
1464 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1467 if (intra && i == 0 && v != 8) {
1468 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1469 v = 8; // needed by pink.mpg / issue1046
1478 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1480 av_dlog(s->avctx, "matrix extension\n");
1482 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1483 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1484 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1485 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1488 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1490 MpegEncContext *s = &s1->mpeg_enc_ctx;
1492 s->full_pel[0] = s->full_pel[1] = 0;
1493 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1494 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1495 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1496 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1497 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1498 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1499 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1500 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1501 s->pict_type = AV_PICTURE_TYPE_I;
1503 s->pict_type = AV_PICTURE_TYPE_P;
1505 s->pict_type = AV_PICTURE_TYPE_B;
1506 s->current_picture.f.pict_type = s->pict_type;
1507 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1509 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1510 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1511 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1512 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1514 s->intra_dc_precision = get_bits(&s->gb, 2);
1515 s->picture_structure = get_bits(&s->gb, 2);
1516 s->top_field_first = get_bits1(&s->gb);
1517 s->frame_pred_frame_dct = get_bits1(&s->gb);
1518 s->concealment_motion_vectors = get_bits1(&s->gb);
1519 s->q_scale_type = get_bits1(&s->gb);
1520 s->intra_vlc_format = get_bits1(&s->gb);
1521 s->alternate_scan = get_bits1(&s->gb);
1522 s->repeat_first_field = get_bits1(&s->gb);
1523 s->chroma_420_type = get_bits1(&s->gb);
1524 s->progressive_frame = get_bits1(&s->gb);
1527 if (s->alternate_scan) {
1528 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1529 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1531 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1532 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1535 /* composite display not parsed */
1536 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1537 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1538 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1539 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1540 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1541 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1542 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1543 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1544 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1547 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1549 AVCodecContext *avctx = s->avctx;
1550 Mpeg1Context *s1 = (Mpeg1Context*)s;
1552 /* start frame decoding */
1553 if (s->first_field || s->picture_structure == PICT_FRAME) {
1554 AVFrameSideData *pan_scan;
1556 if (ff_MPV_frame_start(s, avctx) < 0)
1559 ff_mpeg_er_frame_start(s);
1561 /* first check if we must repeat the frame */
1562 s->current_picture_ptr->f.repeat_pict = 0;
1563 if (s->repeat_first_field) {
1564 if (s->progressive_sequence) {
1565 if (s->top_field_first)
1566 s->current_picture_ptr->f.repeat_pict = 4;
1568 s->current_picture_ptr->f.repeat_pict = 2;
1569 } else if (s->progressive_frame) {
1570 s->current_picture_ptr->f.repeat_pict = 1;
1574 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1575 AV_FRAME_DATA_PANSCAN,
1576 sizeof(s1->pan_scan));
1578 return AVERROR(ENOMEM);
1579 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1581 if (s1->a53_caption) {
1582 AVFrameSideData *sd = av_frame_new_side_data(
1583 &s->current_picture_ptr->f, AV_FRAME_DATA_A53_CC,
1584 s1->a53_caption_size);
1586 memcpy(sd->data, s1->a53_caption, s1->a53_caption_size);
1587 av_freep(&s1->a53_caption);
1589 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1590 ff_thread_finish_setup(avctx);
1591 } else { // second field
1594 if (!s->current_picture_ptr) {
1595 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1599 if (s->avctx->hwaccel &&
1600 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1601 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1602 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1605 for (i = 0; i < 4; i++) {
1606 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1607 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1608 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1613 if (avctx->hwaccel) {
1614 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1621 #define DECODE_SLICE_ERROR -1
1622 #define DECODE_SLICE_OK 0
1626 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1627 * @return DECODE_SLICE_ERROR if the slice is damaged,
1628 * DECODE_SLICE_OK if this slice is OK
1630 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1631 const uint8_t **buf, int buf_size)
1633 AVCodecContext *avctx = s->avctx;
1634 const int lowres = s->avctx->lowres;
1635 const int field_pic = s->picture_structure != PICT_FRAME;
1638 s->resync_mb_y = -1;
1640 av_assert0(mb_y < s->mb_height);
1642 init_get_bits(&s->gb, *buf, buf_size * 8);
1643 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1644 skip_bits(&s->gb, 3);
1646 ff_mpeg1_clean_buffers(s);
1647 s->interlaced_dct = 0;
1649 s->qscale = get_qscale(s);
1651 if (s->qscale == 0) {
1652 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1656 /* extra slice info */
1657 if (skip_1stop_8data_bits(&s->gb) < 0)
1658 return AVERROR_INVALIDDATA;
1662 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1665 while (get_bits_left(&s->gb) > 0) {
1666 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1667 MBINCR_VLC_BITS, 2);
1669 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1676 /* otherwise, stuffing, nothing to do */
1684 if (s->mb_x >= (unsigned)s->mb_width) {
1685 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1689 if (avctx->hwaccel && avctx->hwaccel->decode_slice) {
1690 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1691 int start_code = -1;
1692 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1693 if (buf_end < *buf + buf_size)
1696 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1697 return DECODE_SLICE_ERROR;
1699 return DECODE_SLICE_OK;
1702 s->resync_mb_x = s->mb_x;
1703 s->resync_mb_y = s->mb_y = mb_y;
1705 ff_init_block_index(s);
1707 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1708 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1709 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",
1710 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],
1711 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")),
1712 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1713 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1714 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1719 // If 1, we memcpy blocks in xvmcvideo.
1720 if ((CONFIG_MPEG1_XVMC_HWACCEL || CONFIG_MPEG2_XVMC_HWACCEL) && s->pack_pblocks)
1721 ff_xvmc_init_block(s); // set s->block
1723 if (mpeg_decode_mb(s, s->block) < 0)
1726 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1727 const int wrap = s->b8_stride;
1728 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1729 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1730 int motion_x, motion_y, dir, i;
1732 for (i = 0; i < 2; i++) {
1733 for (dir = 0; dir < 2; dir++) {
1734 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1735 motion_x = motion_y = 0;
1736 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1737 motion_x = s->mv[dir][0][0];
1738 motion_y = s->mv[dir][0][1];
1739 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1740 motion_x = s->mv[dir][i][0];
1741 motion_y = s->mv[dir][i][1];
1744 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1745 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1746 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1747 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1748 s->current_picture.ref_index [dir][b8_xy ] =
1749 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1750 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1757 s->dest[0] += 16 >> lowres;
1758 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1759 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1761 ff_MPV_decode_mb(s, s->block);
1763 if (++s->mb_x >= s->mb_width) {
1764 const int mb_size = 16 >> s->avctx->lowres;
1766 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1767 ff_MPV_report_decode_progress(s);
1770 s->mb_y += 1 << field_pic;
1772 if (s->mb_y >= s->mb_height) {
1773 int left = get_bits_left(&s->gb);
1774 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1775 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1776 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1778 if (left >= 32 && !is_d10) {
1779 GetBitContext gb = s->gb;
1780 align_get_bits(&gb);
1781 if (show_bits(&gb, 24) == 0x060E2B) {
1782 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1787 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1788 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1789 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1795 ff_init_block_index(s);
1798 /* skip mb handling */
1799 if (s->mb_skip_run == -1) {
1800 /* read increment again */
1803 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1804 MBINCR_VLC_BITS, 2);
1806 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1811 s->mb_skip_run += 33;
1812 } else if (code == 35) {
1813 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1814 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1817 goto eos; /* end of slice */
1819 /* otherwise, stuffing, nothing to do */
1821 s->mb_skip_run += code;
1825 if (s->mb_skip_run) {
1827 if (s->pict_type == AV_PICTURE_TYPE_I) {
1828 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1834 for (i = 0; i < 12; i++)
1835 s->block_last_index[i] = -1;
1836 if (s->picture_structure == PICT_FRAME)
1837 s->mv_type = MV_TYPE_16X16;
1839 s->mv_type = MV_TYPE_FIELD;
1840 if (s->pict_type == AV_PICTURE_TYPE_P) {
1841 /* if P type, zero motion vector is implied */
1842 s->mv_dir = MV_DIR_FORWARD;
1843 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1844 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1845 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1846 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1848 /* if B type, reuse previous vectors and directions */
1849 s->mv[0][0][0] = s->last_mv[0][0][0];
1850 s->mv[0][0][1] = s->last_mv[0][0][1];
1851 s->mv[1][0][0] = s->last_mv[1][0][0];
1852 s->mv[1][0][1] = s->last_mv[1][0][1];
1857 eos: // end of slice
1858 if (get_bits_left(&s->gb) < 0)
1859 return AVERROR_INVALIDDATA;
1860 *buf += (get_bits_count(&s->gb)-1)/8;
1861 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1865 static int slice_decode_thread(AVCodecContext *c, void *arg)
1867 MpegEncContext *s = *(void**)arg;
1868 const uint8_t *buf = s->gb.buffer;
1869 int mb_y = s->start_mb_y;
1870 const int field_pic = s->picture_structure != PICT_FRAME;
1872 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1875 uint32_t start_code;
1878 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1880 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1881 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1882 s->start_mb_y, s->end_mb_y, s->er.error_count);
1884 if (c->err_recognition & AV_EF_EXPLODE)
1886 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1887 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);
1889 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);
1892 if (s->mb_y == s->end_mb_y)
1896 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1897 mb_y= start_code - SLICE_MIN_START_CODE;
1898 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1899 mb_y += (*buf&0xE0)<<2;
1901 if (s->picture_structure == PICT_BOTTOM_FIELD)
1903 if (mb_y < 0 || mb_y >= s->end_mb_y)
1909 * Handle slice ends.
1910 * @return 1 if it seems to be the last slice
1912 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1914 Mpeg1Context *s1 = avctx->priv_data;
1915 MpegEncContext *s = &s1->mpeg_enc_ctx;
1917 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1920 if (s->avctx->hwaccel) {
1921 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1922 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1925 /* end of slice reached */
1926 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s1->first_slice) {
1929 ff_er_frame_end(&s->er);
1931 ff_MPV_frame_end(s);
1933 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1934 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1937 ff_print_debug_info(s, s->current_picture_ptr, pict);
1938 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1940 if (avctx->active_thread_type & FF_THREAD_FRAME)
1941 s->picture_number++;
1942 /* latency of 1 frame for I- and P-frames */
1943 /* XXX: use another variable than picture_number */
1944 if (s->last_picture_ptr != NULL) {
1945 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1948 ff_print_debug_info(s, s->last_picture_ptr, pict);
1949 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1959 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1960 const uint8_t *buf, int buf_size)
1962 Mpeg1Context *s1 = avctx->priv_data;
1963 MpegEncContext *s = &s1->mpeg_enc_ctx;
1967 init_get_bits(&s->gb, buf, buf_size*8);
1969 width = get_bits(&s->gb, 12);
1970 height = get_bits(&s->gb, 12);
1971 if (width == 0 || height == 0) {
1972 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1974 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1975 return AVERROR_INVALIDDATA;
1977 s->aspect_ratio_info = get_bits(&s->gb, 4);
1978 if (s->aspect_ratio_info == 0) {
1979 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1980 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1983 s->frame_rate_index = get_bits(&s->gb, 4);
1984 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1986 s->bit_rate = get_bits(&s->gb, 18) * 400;
1987 if (get_bits1(&s->gb) == 0) /* marker */
1992 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1993 skip_bits(&s->gb, 1);
1996 if (get_bits1(&s->gb)) {
1997 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1999 for (i = 0; i < 64; i++) {
2000 j = s->dsp.idct_permutation[i];
2001 v = ff_mpeg1_default_intra_matrix[i];
2002 s->intra_matrix[j] = v;
2003 s->chroma_intra_matrix[j] = v;
2006 if (get_bits1(&s->gb)) {
2007 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2009 for (i = 0; i < 64; i++) {
2010 int j = s->dsp.idct_permutation[i];
2011 v = ff_mpeg1_default_non_intra_matrix[i];
2012 s->inter_matrix[j] = v;
2013 s->chroma_inter_matrix[j] = v;
2017 if (show_bits(&s->gb, 23) != 0) {
2018 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2022 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2023 s->progressive_sequence = 1;
2024 s->progressive_frame = 1;
2025 s->picture_structure = PICT_FRAME;
2027 s->frame_pred_frame_dct = 1;
2028 s->chroma_format = 1;
2029 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2030 s->out_format = FMT_MPEG1;
2031 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2032 if (s->flags & CODEC_FLAG_LOW_DELAY)
2035 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2036 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2037 s->avctx->rc_buffer_size, s->bit_rate);
2042 static int vcr2_init_sequence(AVCodecContext *avctx)
2044 Mpeg1Context *s1 = avctx->priv_data;
2045 MpegEncContext *s = &s1->mpeg_enc_ctx;
2048 /* start new MPEG-1 context decoding */
2049 s->out_format = FMT_MPEG1;
2050 if (s1->mpeg_enc_ctx_allocated) {
2051 ff_MPV_common_end(s);
2052 s1->mpeg_enc_ctx_allocated = 0;
2054 s->width = avctx->coded_width;
2055 s->height = avctx->coded_height;
2056 avctx->has_b_frames = 0; // true?
2059 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2060 setup_hwaccel_for_pixfmt(avctx);
2062 if (ff_MPV_common_init(s) < 0)
2064 s1->mpeg_enc_ctx_allocated = 1;
2066 for (i = 0; i < 64; i++) {
2067 int j = s->dsp.idct_permutation[i];
2068 v = ff_mpeg1_default_intra_matrix[i];
2069 s->intra_matrix[j] = v;
2070 s->chroma_intra_matrix[j] = v;
2072 v = ff_mpeg1_default_non_intra_matrix[i];
2073 s->inter_matrix[j] = v;
2074 s->chroma_inter_matrix[j] = v;
2077 s->progressive_sequence = 1;
2078 s->progressive_frame = 1;
2079 s->picture_structure = PICT_FRAME;
2081 s->frame_pred_frame_dct = 1;
2082 s->chroma_format = 1;
2083 if (s->codec_tag == AV_RL32("BW10")) {
2084 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2086 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2087 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2089 s1->save_width = s->width;
2090 s1->save_height = s->height;
2091 s1->save_progressive_seq = s->progressive_sequence;
2096 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
2097 const uint8_t *p, int buf_size)
2099 Mpeg1Context *s1 = avctx->priv_data;
2101 if (buf_size >= 6 &&
2102 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
2103 p[4] == 3 && (p[5] & 0x40)) {
2104 /* extract A53 Part 4 CC data */
2105 int cc_count = p[5] & 0x1f;
2106 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
2107 av_freep(&s1->a53_caption);
2108 s1->a53_caption_size = cc_count * 3;
2109 s1->a53_caption = av_malloc(s1->a53_caption_size);
2110 if (s1->a53_caption) {
2111 memcpy(s1->a53_caption, p + 7, s1->a53_caption_size);
2115 } else if (buf_size >= 11 &&
2116 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
2117 /* extract DVD CC data */
2120 // There is a caption count field in the data, but it is often
2121 // incorect. So count the number of captions present.
2122 for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
2124 // Transform the DVD format into A53 Part 4 format
2126 av_freep(&s1->a53_caption);
2127 s1->a53_caption_size = cc_count * 6;
2128 s1->a53_caption = av_malloc(s1->a53_caption_size);
2129 if (s1->a53_caption) {
2130 uint8_t field1 = !!(p[4] & 0x80);
2131 uint8_t *cap = s1->a53_caption;
2133 for (i = 0; i < cc_count; i++) {
2134 cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2137 cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2150 static void mpeg_decode_user_data(AVCodecContext *avctx,
2151 const uint8_t *p, int buf_size)
2153 Mpeg1Context *s = avctx->priv_data;
2154 const uint8_t *buf_end = p + buf_size;
2159 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2163 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2164 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2166 av_log(avctx, AV_LOG_ERROR, "\n");*/
2169 /* we parse the DTG active format information */
2170 if (buf_end - p >= 5 &&
2171 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2179 if (buf_end - p < 1)
2181 avctx->dtg_active_format = p[0] & 0x0f;
2183 } else if (buf_end - p >= 6 &&
2184 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2185 p[4] == 0x03) { // S3D_video_format_length
2186 // the 0x7F mask ignores the reserved_bit value
2187 const uint8_t S3D_video_format_type = p[5] & 0x7F;
2189 if (S3D_video_format_type == 0x03 ||
2190 S3D_video_format_type == 0x04 ||
2191 S3D_video_format_type == 0x08 ||
2192 S3D_video_format_type == 0x23) {
2193 Mpeg1Context *s1 = avctx->priv_data;
2194 MpegEncContext *s = &s1->mpeg_enc_ctx;
2196 if (!s->current_picture_ptr)
2199 stereo = av_stereo3d_create_side_data(&s->current_picture_ptr->f);
2203 switch (S3D_video_format_type) {
2205 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2208 stereo->type = AV_STEREO3D_TOPBOTTOM;
2211 stereo->type = AV_STEREO3D_2D;
2214 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2218 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2223 static void mpeg_decode_gop(AVCodecContext *avctx,
2224 const uint8_t *buf, int buf_size)
2226 Mpeg1Context *s1 = avctx->priv_data;
2227 MpegEncContext *s = &s1->mpeg_enc_ctx;
2231 init_get_bits(&s->gb, buf, buf_size*8);
2233 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2235 s->closed_gop = get_bits1(&s->gb);
2236 /*broken_link indicate that after editing the
2237 reference frames of the first B-Frames after GOP I-Frame
2238 are missing (open gop)*/
2239 broken_link = get_bits1(&s->gb);
2241 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2242 char tcbuf[AV_TIMECODE_STR_SIZE];
2243 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2244 av_log(s->avctx, AV_LOG_DEBUG,
2245 "GOP (%s) closed_gop=%d broken_link=%d\n",
2246 tcbuf, s->closed_gop, broken_link);
2250 static int decode_chunks(AVCodecContext *avctx,
2251 AVFrame *picture, int *got_output,
2252 const uint8_t *buf, int buf_size)
2254 Mpeg1Context *s = avctx->priv_data;
2255 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2256 const uint8_t *buf_ptr = buf;
2257 const uint8_t *buf_end = buf + buf_size;
2258 int ret, input_size;
2259 int last_code = 0, skip_frame = 0;
2260 int picture_start_code_seen = 0;
2263 /* find next start code */
2264 uint32_t start_code = -1;
2265 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2266 if (start_code > 0x1ff) {
2268 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2271 av_assert0(avctx->thread_count > 1);
2273 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2274 for (i = 0; i < s->slice_count; i++)
2275 s2->er.error_count += s2->thread_context[i]->er.error_count;
2278 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2279 && uses_vdpau(avctx))
2280 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2282 ret = slice_end(avctx, picture);
2286 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2292 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2293 return AVERROR_INVALIDDATA;
2295 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2298 input_size = buf_end - buf_ptr;
2300 if (avctx->debug & FF_DEBUG_STARTCODE) {
2301 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2304 /* prepare data for next start code */
2305 switch (start_code) {
2306 case SEQ_START_CODE:
2307 if (last_code == 0) {
2308 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2309 if(buf != avctx->extradata)
2312 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2313 if (avctx->err_recognition & AV_EF_EXPLODE)
2314 return AVERROR_INVALIDDATA;
2318 case PICTURE_START_CODE:
2319 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2320 /* If it's a frame picture, there can't be more than one picture header.
2321 Yet, it does happen and we need to handle it. */
2322 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2325 picture_start_code_seen = 1;
2327 if (s2->width <= 0 || s2->height <= 0) {
2328 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2329 s2->width, s2->height);
2330 return AVERROR_INVALIDDATA;
2334 s2->intra_dc_precision= 3;
2335 s2->intra_matrix[0]= 1;
2337 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2338 !avctx->hwaccel && s->slice_count) {
2341 avctx->execute(avctx, slice_decode_thread,
2342 s2->thread_context, NULL,
2343 s->slice_count, sizeof(void*));
2344 for (i = 0; i < s->slice_count; i++)
2345 s2->er.error_count += s2->thread_context[i]->er.error_count;
2348 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2349 ret = mpeg_decode_postinit(avctx);
2351 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2355 /* we have a complete image: we try to decompress it */
2356 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2359 last_code = PICTURE_START_CODE;
2361 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2362 if (avctx->err_recognition & AV_EF_EXPLODE)
2363 return AVERROR_INVALIDDATA;
2366 case EXT_START_CODE:
2367 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2369 switch (get_bits(&s2->gb, 4)) {
2371 if (last_code == 0) {
2372 mpeg_decode_sequence_extension(s);
2374 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2375 if (avctx->err_recognition & AV_EF_EXPLODE)
2376 return AVERROR_INVALIDDATA;
2380 mpeg_decode_sequence_display_extension(s);
2383 mpeg_decode_quant_matrix_extension(s2);
2386 mpeg_decode_picture_display_extension(s);
2389 if (last_code == PICTURE_START_CODE) {
2390 mpeg_decode_picture_coding_extension(s);
2392 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2393 if (avctx->err_recognition & AV_EF_EXPLODE)
2394 return AVERROR_INVALIDDATA;
2399 case USER_START_CODE:
2400 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2402 case GOP_START_CODE:
2403 if (last_code == 0) {
2405 mpeg_decode_gop(avctx, buf_ptr, input_size);
2408 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2409 if (avctx->err_recognition & AV_EF_EXPLODE)
2410 return AVERROR_INVALIDDATA;
2414 if (start_code >= SLICE_MIN_START_CODE &&
2415 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2417 if (s2->progressive_sequence && !s2->progressive_frame) {
2418 s2->progressive_frame = 1;
2419 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2422 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2423 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2424 s2->picture_structure = PICT_FRAME;
2427 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2428 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2431 if (s2->picture_structure == PICT_FRAME) {
2432 s2->first_field = 0;
2433 s2->v_edge_pos = 16 * s2->mb_height;
2435 s2->first_field ^= 1;
2436 s2->v_edge_pos = 8 * s2->mb_height;
2437 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2440 if (start_code >= SLICE_MIN_START_CODE &&
2441 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2442 const int field_pic = s2->picture_structure != PICT_FRAME;
2443 int mb_y = start_code - SLICE_MIN_START_CODE;
2444 last_code = SLICE_MIN_START_CODE;
2445 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2446 mb_y += (*buf_ptr&0xE0)<<2;
2449 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2452 if (buf_end - buf_ptr < 2) {
2453 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2454 return AVERROR_INVALIDDATA;
2457 if (mb_y >= s2->mb_height) {
2458 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2462 if (s2->last_picture_ptr == NULL) {
2463 /* Skip B-frames if we do not have reference frames and gop is not closed */
2464 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2465 if (!s2->closed_gop) {
2471 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2473 if (s2->next_picture_ptr == NULL) {
2474 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2475 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2480 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2481 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2482 avctx->skip_frame >= AVDISCARD_ALL) {
2487 if (!s->mpeg_enc_ctx_allocated)
2490 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2491 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2495 if (!s2->pict_type) {
2496 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2497 if (avctx->err_recognition & AV_EF_EXPLODE)
2498 return AVERROR_INVALIDDATA;
2502 if (s->first_slice) {
2505 if (mpeg_field_start(s2, buf, buf_size) < 0)
2508 if (!s2->current_picture_ptr) {
2509 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2510 return AVERROR_INVALIDDATA;
2513 if (uses_vdpau(avctx)) {
2518 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2520 int threshold = (s2->mb_height * s->slice_count +
2521 s2->slice_context_count / 2) /
2522 s2->slice_context_count;
2523 av_assert0(avctx->thread_count > 1);
2524 if (threshold <= mb_y) {
2525 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2527 thread_context->start_mb_y = mb_y;
2528 thread_context->end_mb_y = s2->mb_height;
2529 if (s->slice_count) {
2530 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2531 ret = ff_update_duplicate_context(thread_context,
2536 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2539 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2541 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2545 if (avctx->err_recognition & AV_EF_EXPLODE)
2547 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2548 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);
2550 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);
2559 static int mpeg_decode_frame(AVCodecContext *avctx,
2560 void *data, int *got_output,
2563 const uint8_t *buf = avpkt->data;
2565 int buf_size = avpkt->size;
2566 Mpeg1Context *s = avctx->priv_data;
2567 AVFrame *picture = data;
2568 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2569 av_dlog(avctx, "fill_buffer\n");
2571 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2572 /* special case for last picture */
2573 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2574 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2578 s2->next_picture_ptr = NULL;
2585 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2586 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2588 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2592 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2593 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2594 || s2->codec_tag == AV_RL32("BW10")
2596 vcr2_init_sequence(avctx);
2600 if (avctx->extradata && !s->extradata_decoded) {
2601 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2603 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2606 s->extradata_decoded = 1;
2607 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2608 s2->current_picture_ptr = NULL;
2613 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2614 if (ret<0 || *got_output)
2615 s2->current_picture_ptr = NULL;
2621 static void flush(AVCodecContext *avctx)
2623 Mpeg1Context *s = avctx->priv_data;
2627 ff_mpeg_flush(avctx);
2630 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2632 Mpeg1Context *s = avctx->priv_data;
2634 if (s->mpeg_enc_ctx_allocated)
2635 ff_MPV_common_end(&s->mpeg_enc_ctx);
2636 av_freep(&s->a53_caption);
2640 static const AVProfile mpeg2_video_profiles[] = {
2641 { FF_PROFILE_MPEG2_422, "4:2:2" },
2642 { FF_PROFILE_MPEG2_HIGH, "High" },
2643 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2644 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2645 { FF_PROFILE_MPEG2_MAIN, "Main" },
2646 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2647 { FF_PROFILE_RESERVED, "Reserved" },
2648 { FF_PROFILE_RESERVED, "Reserved" },
2649 { FF_PROFILE_UNKNOWN },
2653 AVCodec ff_mpeg1video_decoder = {
2654 .name = "mpeg1video",
2655 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2656 .type = AVMEDIA_TYPE_VIDEO,
2657 .id = AV_CODEC_ID_MPEG1VIDEO,
2658 .priv_data_size = sizeof(Mpeg1Context),
2659 .init = mpeg_decode_init,
2660 .close = mpeg_decode_end,
2661 .decode = mpeg_decode_frame,
2662 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2663 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2664 CODEC_CAP_SLICE_THREADS,
2667 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2670 AVCodec ff_mpeg2video_decoder = {
2671 .name = "mpeg2video",
2672 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2673 .type = AVMEDIA_TYPE_VIDEO,
2674 .id = AV_CODEC_ID_MPEG2VIDEO,
2675 .priv_data_size = sizeof(Mpeg1Context),
2676 .init = mpeg_decode_init,
2677 .close = mpeg_decode_end,
2678 .decode = mpeg_decode_frame,
2679 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2680 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2681 CODEC_CAP_SLICE_THREADS,
2684 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2688 AVCodec ff_mpegvideo_decoder = {
2689 .name = "mpegvideo",
2690 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2691 .type = AVMEDIA_TYPE_VIDEO,
2692 .id = AV_CODEC_ID_MPEG2VIDEO,
2693 .priv_data_size = sizeof(Mpeg1Context),
2694 .init = mpeg_decode_init,
2695 .close = mpeg_decode_end,
2696 .decode = mpeg_decode_frame,
2697 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2703 #if CONFIG_MPEG_XVMC_DECODER
2704 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2706 if (avctx->active_thread_type & FF_THREAD_SLICE)
2708 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2710 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2711 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2713 mpeg_decode_init(avctx);
2715 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2716 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2721 AVCodec ff_mpeg_xvmc_decoder = {
2722 .name = "mpegvideo_xvmc",
2723 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2724 .type = AVMEDIA_TYPE_VIDEO,
2725 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2726 .priv_data_size = sizeof(Mpeg1Context),
2727 .init = mpeg_mc_decode_init,
2728 .close = mpeg_decode_end,
2729 .decode = mpeg_decode_frame,
2730 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2731 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2736 #endif /* FF_API_XVMC */
2738 #if CONFIG_MPEG_VDPAU_DECODER
2739 AVCodec ff_mpeg_vdpau_decoder = {
2740 .name = "mpegvideo_vdpau",
2741 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2742 .type = AVMEDIA_TYPE_VIDEO,
2743 .id = AV_CODEC_ID_MPEG2VIDEO,
2744 .priv_data_size = sizeof(Mpeg1Context),
2745 .init = mpeg_decode_init,
2746 .close = mpeg_decode_end,
2747 .decode = mpeg_decode_frame,
2748 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2749 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2754 #if CONFIG_MPEG1_VDPAU_DECODER
2755 AVCodec ff_mpeg1_vdpau_decoder = {
2756 .name = "mpeg1video_vdpau",
2757 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2758 .type = AVMEDIA_TYPE_VIDEO,
2759 .id = AV_CODEC_ID_MPEG1VIDEO,
2760 .priv_data_size = sizeof(Mpeg1Context),
2761 .init = mpeg_decode_init,
2762 .close = mpeg_decode_end,
2763 .decode = mpeg_decode_frame,
2764 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2765 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,