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 */
50 int save_width, save_height, save_progressive_seq;
51 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
52 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
54 int extradata_decoded;
57 #define MB_TYPE_ZERO_MV 0x20000000
59 static const uint32_t ptype2mb_type[7] = {
61 MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
63 MB_TYPE_L0 | MB_TYPE_CBP,
64 MB_TYPE_QUANT | MB_TYPE_INTRA,
65 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
66 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
69 static const uint32_t btype2mb_type[11] = {
72 MB_TYPE_L1 | MB_TYPE_CBP,
74 MB_TYPE_L0 | MB_TYPE_CBP,
76 MB_TYPE_L0L1 | MB_TYPE_CBP,
77 MB_TYPE_QUANT | MB_TYPE_INTRA,
78 MB_TYPE_QUANT | MB_TYPE_L1 | MB_TYPE_CBP,
79 MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
80 MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
83 static const uint8_t non_linear_qscale[32] = {
84 0, 1, 2, 3, 4, 5, 6, 7,
85 8,10,12,14,16,18,20,22,
86 24,28,32,36,40,44,48,52,
87 56,64,72,80,88,96,104,112,
90 /* as H.263, but only 17 codes */
91 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
93 int code, sign, val, shift;
95 code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
103 sign = get_bits1(&s->gb);
107 val = (val - 1) << shift;
108 val |= get_bits(&s->gb, shift);
115 /* modulo decoding */
116 return sign_extend(val, 5 + shift);
119 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
121 int level, dc, diff, i, j, run;
123 RLTable *rl = &ff_rl_mpeg1;
124 uint8_t * const scantable = s->intra_scantable.permutated;
125 const uint16_t *quant_matrix = s->intra_matrix;
126 const int qscale = s->qscale;
129 component = (n <= 3 ? 0 : n - 4 + 1);
130 diff = decode_dc(&s->gb, component);
133 dc = s->last_dc[component];
135 s->last_dc[component] = dc;
136 block[0] = dc * quant_matrix[0];
137 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
140 OPEN_READER(re, &s->gb);
141 /* now quantify & encode AC coefficients */
143 UPDATE_CACHE(re, &s->gb);
144 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
148 } else if (level != 0) {
151 level = (level * qscale * quant_matrix[j]) >> 4;
152 level = (level - 1) | 1;
153 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
154 LAST_SKIP_BITS(re, &s->gb, 1);
157 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
158 UPDATE_CACHE(re, &s->gb);
159 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
161 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
162 } else if (level == 0) {
163 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
169 level = (level * qscale * quant_matrix[j]) >> 4;
170 level = (level - 1) | 1;
173 level = (level * qscale * quant_matrix[j]) >> 4;
174 level = (level - 1) | 1;
178 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
184 CLOSE_READER(re, &s->gb);
186 s->block_last_index[n] = i;
190 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
192 return mpeg1_decode_block_intra(s, block, n);
195 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
197 int level, i, j, run;
198 RLTable *rl = &ff_rl_mpeg1;
199 uint8_t * const scantable = s->intra_scantable.permutated;
200 const uint16_t *quant_matrix = s->inter_matrix;
201 const int qscale = s->qscale;
204 OPEN_READER(re, &s->gb);
206 // special case for first coefficient, no need to add second VLC table
207 UPDATE_CACHE(re, &s->gb);
208 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
209 level = (3 * qscale * quant_matrix[0]) >> 5;
210 level = (level - 1) | 1;
211 if (GET_CACHE(re, &s->gb) & 0x40000000)
215 SKIP_BITS(re, &s->gb, 2);
216 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
219 /* now quantify & encode AC coefficients */
221 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
226 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
227 level = (level - 1) | 1;
228 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
229 SKIP_BITS(re, &s->gb, 1);
232 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
233 UPDATE_CACHE(re, &s->gb);
234 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
236 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
237 } else if (level == 0) {
238 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
244 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
245 level = (level - 1) | 1;
248 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
249 level = (level - 1) | 1;
253 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
258 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
260 UPDATE_CACHE(re, &s->gb);
263 LAST_SKIP_BITS(re, &s->gb, 2);
264 CLOSE_READER(re, &s->gb);
266 s->block_last_index[n] = i;
271 * Note: this function can read out of range and crash for corrupt streams.
272 * Changing this would eat up any speed benefits it has.
273 * Do not use "fast" flag if you need the code to be robust.
275 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
277 int level, i, j, run;
278 RLTable *rl = &ff_rl_mpeg1;
279 uint8_t * const scantable = s->intra_scantable.permutated;
280 const int qscale = s->qscale;
283 OPEN_READER(re, &s->gb);
285 // special case for first coefficient, no need to add second VLC table
286 UPDATE_CACHE(re, &s->gb);
287 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
288 level = (3 * qscale) >> 1;
289 level = (level - 1) | 1;
290 if (GET_CACHE(re, &s->gb) & 0x40000000)
294 SKIP_BITS(re, &s->gb, 2);
295 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
299 /* now quantify & encode AC coefficients */
301 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
306 level = ((level * 2 + 1) * qscale) >> 1;
307 level = (level - 1) | 1;
308 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
309 SKIP_BITS(re, &s->gb, 1);
312 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
313 UPDATE_CACHE(re, &s->gb);
314 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
316 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
317 } else if (level == 0) {
318 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
324 level = ((level * 2 + 1) * qscale) >> 1;
325 level = (level - 1) | 1;
328 level = ((level * 2 + 1) * qscale) >> 1;
329 level = (level - 1) | 1;
334 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
336 UPDATE_CACHE(re, &s->gb);
339 LAST_SKIP_BITS(re, &s->gb, 2);
340 CLOSE_READER(re, &s->gb);
342 s->block_last_index[n] = i;
347 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
349 int level, i, j, run;
350 RLTable *rl = &ff_rl_mpeg1;
351 uint8_t * const scantable = s->intra_scantable.permutated;
352 const uint16_t *quant_matrix;
353 const int qscale = s->qscale;
359 OPEN_READER(re, &s->gb);
362 quant_matrix = s->inter_matrix;
364 quant_matrix = s->chroma_inter_matrix;
366 // special case for first coefficient, no need to add second VLC table
367 UPDATE_CACHE(re, &s->gb);
368 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
369 level= (3 * qscale * quant_matrix[0]) >> 5;
370 if (GET_CACHE(re, &s->gb) & 0x40000000)
375 SKIP_BITS(re, &s->gb, 2);
376 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
380 /* now quantify & encode AC coefficients */
382 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
387 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
388 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
389 SKIP_BITS(re, &s->gb, 1);
392 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
393 UPDATE_CACHE(re, &s->gb);
394 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
399 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
402 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
406 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
412 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
414 UPDATE_CACHE(re, &s->gb);
417 LAST_SKIP_BITS(re, &s->gb, 2);
418 CLOSE_READER(re, &s->gb);
420 block[63] ^= (mismatch & 1);
422 s->block_last_index[n] = i;
427 * Note: this function can read out of range and crash for corrupt streams.
428 * Changing this would eat up any speed benefits it has.
429 * Do not use "fast" flag if you need the code to be robust.
431 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
432 int16_t *block, int n)
434 int level, i, j, run;
435 RLTable *rl = &ff_rl_mpeg1;
436 uint8_t * const scantable = s->intra_scantable.permutated;
437 const int qscale = s->qscale;
438 OPEN_READER(re, &s->gb);
441 // special case for first coefficient, no need to add second VLC table
442 UPDATE_CACHE(re, &s->gb);
443 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
444 level = (3 * qscale) >> 1;
445 if (GET_CACHE(re, &s->gb) & 0x40000000)
449 SKIP_BITS(re, &s->gb, 2);
450 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
454 /* now quantify & encode AC coefficients */
456 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
461 level = ((level * 2 + 1) * qscale) >> 1;
462 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
463 SKIP_BITS(re, &s->gb, 1);
466 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
467 UPDATE_CACHE(re, &s->gb);
468 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
473 level = ((-level * 2 + 1) * qscale) >> 1;
476 level = ((level * 2 + 1) * qscale) >> 1;
481 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
483 UPDATE_CACHE(re, &s->gb);
486 LAST_SKIP_BITS(re, &s->gb, 2);
487 CLOSE_READER(re, &s->gb);
488 s->block_last_index[n] = i;
493 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
495 int level, dc, diff, i, j, run;
498 uint8_t * const scantable = s->intra_scantable.permutated;
499 const uint16_t *quant_matrix;
500 const int qscale = s->qscale;
505 quant_matrix = s->intra_matrix;
508 quant_matrix = s->chroma_intra_matrix;
509 component = (n & 1) + 1;
511 diff = decode_dc(&s->gb, component);
514 dc = s->last_dc[component];
516 s->last_dc[component] = dc;
517 block[0] = dc << (3 - s->intra_dc_precision);
518 av_dlog(s->avctx, "dc=%d\n", block[0]);
519 mismatch = block[0] ^ 1;
521 if (s->intra_vlc_format)
527 OPEN_READER(re, &s->gb);
528 /* now quantify & encode AC coefficients */
530 UPDATE_CACHE(re, &s->gb);
531 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
535 } else if (level != 0) {
538 level = (level * qscale * quant_matrix[j]) >> 4;
539 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
540 LAST_SKIP_BITS(re, &s->gb, 1);
543 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
544 UPDATE_CACHE(re, &s->gb);
545 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
549 level = (-level * qscale * quant_matrix[j]) >> 4;
552 level = (level * qscale * quant_matrix[j]) >> 4;
556 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
563 CLOSE_READER(re, &s->gb);
565 block[63] ^= mismatch & 1;
567 s->block_last_index[n] = i;
572 * Note: this function can read out of range and crash for corrupt streams.
573 * Changing this would eat up any speed benefits it has.
574 * Do not use "fast" flag if you need the code to be robust.
576 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
578 int level, dc, diff, j, run;
581 uint8_t * scantable = s->intra_scantable.permutated;
582 const uint16_t *quant_matrix;
583 const int qscale = s->qscale;
587 quant_matrix = s->intra_matrix;
590 quant_matrix = s->chroma_intra_matrix;
591 component = (n & 1) + 1;
593 diff = decode_dc(&s->gb, component);
596 dc = s->last_dc[component];
598 s->last_dc[component] = dc;
599 block[0] = dc << (3 - s->intra_dc_precision);
600 if (s->intra_vlc_format)
606 OPEN_READER(re, &s->gb);
607 /* now quantify & encode AC coefficients */
609 UPDATE_CACHE(re, &s->gb);
610 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
614 } else if (level != 0) {
617 level = (level * qscale * quant_matrix[j]) >> 4;
618 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
619 LAST_SKIP_BITS(re, &s->gb, 1);
622 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
623 UPDATE_CACHE(re, &s->gb);
624 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
628 level = (-level * qscale * quant_matrix[j]) >> 4;
631 level = (level * qscale * quant_matrix[j]) >> 4;
637 CLOSE_READER(re, &s->gb);
640 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
644 /******************************************/
647 static inline int get_dmv(MpegEncContext *s)
649 if (get_bits1(&s->gb))
650 return 1 - (get_bits1(&s->gb) << 1);
655 static inline int get_qscale(MpegEncContext *s)
657 int qscale = get_bits(&s->gb, 5);
658 if (s->q_scale_type) {
659 return non_linear_qscale[qscale];
665 static void exchange_uv(MpegEncContext *s)
670 s->pblocks[4] = s->pblocks[5];
674 /* motion type (for MPEG-2) */
680 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
682 int i, j, k, cbp, val, mb_type, motion_type;
683 const int mb_block_count = 4 + (1 << s->chroma_format);
685 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
687 av_assert2(s->mb_skipped == 0);
689 if (s->mb_skip_run-- != 0) {
690 if (s->pict_type == AV_PICTURE_TYPE_P) {
692 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
697 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
699 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
700 if (IS_INTRA(mb_type)) {
701 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
704 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
705 mb_type | MB_TYPE_SKIP;
707 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
714 switch (s->pict_type) {
716 case AV_PICTURE_TYPE_I:
717 if (get_bits1(&s->gb) == 0) {
718 if (get_bits1(&s->gb) == 0) {
719 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
722 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
724 mb_type = MB_TYPE_INTRA;
727 case AV_PICTURE_TYPE_P:
728 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
730 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
733 mb_type = ptype2mb_type[mb_type];
735 case AV_PICTURE_TYPE_B:
736 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
738 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
741 mb_type = btype2mb_type[mb_type];
744 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
745 // motion_type = 0; /* avoid warning */
746 if (IS_INTRA(mb_type)) {
747 s->dsp.clear_blocks(s->block[0]);
749 if (!s->chroma_y_shift) {
750 s->dsp.clear_blocks(s->block[6]);
753 /* compute DCT type */
754 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
755 !s->frame_pred_frame_dct) {
756 s->interlaced_dct = get_bits1(&s->gb);
759 if (IS_QUANT(mb_type))
760 s->qscale = get_qscale(s);
762 if (s->concealment_motion_vectors) {
763 /* just parse them */
764 if (s->picture_structure != PICT_FRAME)
765 skip_bits1(&s->gb); /* field select */
767 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
768 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
769 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
770 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
772 skip_bits1(&s->gb); /* marker */
774 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
777 FF_DISABLE_DEPRECATION_WARNINGS
778 // if 1, we memcpy blocks in xvmcvideo
779 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
780 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
785 FF_ENABLE_DEPRECATION_WARNINGS
786 #endif /* FF_API_XVMC */
788 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
789 if (s->flags2 & CODEC_FLAG2_FAST) {
790 for (i = 0; i < 6; i++) {
791 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
794 for (i = 0; i < mb_block_count; i++) {
795 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
800 for (i = 0; i < 6; i++) {
801 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
806 if (mb_type & MB_TYPE_ZERO_MV) {
807 av_assert2(mb_type & MB_TYPE_CBP);
809 s->mv_dir = MV_DIR_FORWARD;
810 if (s->picture_structure == PICT_FRAME) {
811 if (s->picture_structure == PICT_FRAME
812 && !s->frame_pred_frame_dct)
813 s->interlaced_dct = get_bits1(&s->gb);
814 s->mv_type = MV_TYPE_16X16;
816 s->mv_type = MV_TYPE_FIELD;
817 mb_type |= MB_TYPE_INTERLACED;
818 s->field_select[0][0] = s->picture_structure - 1;
821 if (IS_QUANT(mb_type))
822 s->qscale = get_qscale(s);
824 s->last_mv[0][0][0] = 0;
825 s->last_mv[0][0][1] = 0;
826 s->last_mv[0][1][0] = 0;
827 s->last_mv[0][1][1] = 0;
831 av_assert2(mb_type & MB_TYPE_L0L1);
832 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
833 /* get additional motion vector type */
834 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
835 motion_type = MT_FRAME;
837 motion_type = get_bits(&s->gb, 2);
838 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
839 s->interlaced_dct = get_bits1(&s->gb);
842 if (IS_QUANT(mb_type))
843 s->qscale = get_qscale(s);
846 s->mv_dir = (mb_type >> 13) & 3;
847 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
848 switch (motion_type) {
849 case MT_FRAME: /* or MT_16X8 */
850 if (s->picture_structure == PICT_FRAME) {
851 mb_type |= MB_TYPE_16x16;
852 s->mv_type = MV_TYPE_16X16;
853 for (i = 0; i < 2; i++) {
854 if (USES_LIST(mb_type, i)) {
856 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
857 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
858 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
859 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
860 /* full_pel: only for MPEG-1 */
861 if (s->full_pel[i]) {
862 s->mv[i][0][0] <<= 1;
863 s->mv[i][0][1] <<= 1;
868 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
869 s->mv_type = MV_TYPE_16X8;
870 for (i = 0; i < 2; i++) {
871 if (USES_LIST(mb_type, i)) {
873 for (j = 0; j < 2; j++) {
874 s->field_select[i][j] = get_bits1(&s->gb);
875 for (k = 0; k < 2; k++) {
876 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
877 s->last_mv[i][j][k]);
878 s->last_mv[i][j][k] = val;
879 s->mv[i][j][k] = val;
887 s->mv_type = MV_TYPE_FIELD;
888 if (s->picture_structure == PICT_FRAME) {
889 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
890 for (i = 0; i < 2; i++) {
891 if (USES_LIST(mb_type, i)) {
892 for (j = 0; j < 2; j++) {
893 s->field_select[i][j] = get_bits1(&s->gb);
894 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
895 s->last_mv[i][j][0]);
896 s->last_mv[i][j][0] = val;
897 s->mv[i][j][0] = val;
898 av_dlog(s->avctx, "fmx=%d\n", val);
899 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
900 s->last_mv[i][j][1] >> 1);
901 s->last_mv[i][j][1] = val << 1;
902 s->mv[i][j][1] = val;
903 av_dlog(s->avctx, "fmy=%d\n", val);
908 av_assert0(!s->progressive_sequence);
909 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
910 for (i = 0; i < 2; i++) {
911 if (USES_LIST(mb_type, i)) {
912 s->field_select[i][0] = get_bits1(&s->gb);
913 for (k = 0; k < 2; k++) {
914 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
915 s->last_mv[i][0][k]);
916 s->last_mv[i][0][k] = val;
917 s->last_mv[i][1][k] = val;
918 s->mv[i][0][k] = val;
925 if(s->progressive_sequence){
926 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
929 s->mv_type = MV_TYPE_DMV;
930 for (i = 0; i < 2; i++) {
931 if (USES_LIST(mb_type, i)) {
932 int dmx, dmy, mx, my, m;
933 const int my_shift = s->picture_structure == PICT_FRAME;
935 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
936 s->last_mv[i][0][0]);
937 s->last_mv[i][0][0] = mx;
938 s->last_mv[i][1][0] = mx;
940 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
941 s->last_mv[i][0][1] >> my_shift);
945 s->last_mv[i][0][1] = my << my_shift;
946 s->last_mv[i][1][1] = my << my_shift;
950 s->mv[i][1][0] = mx; // not used
951 s->mv[i][1][1] = my; // not used
953 if (s->picture_structure == PICT_FRAME) {
954 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
956 // m = 1 + 2 * s->top_field_first;
957 m = s->top_field_first ? 1 : 3;
959 /* top -> top pred */
960 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
961 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
963 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
964 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
966 mb_type |= MB_TYPE_16x16;
968 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
969 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
970 if (s->picture_structure == PICT_TOP_FIELD)
979 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
985 if (HAS_CBP(mb_type)) {
986 s->dsp.clear_blocks(s->block[0]);
988 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
989 if (mb_block_count > 6) {
990 cbp <<= mb_block_count - 6;
991 cbp |= get_bits(&s->gb, mb_block_count - 6);
992 s->dsp.clear_blocks(s->block[6]);
995 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1000 FF_DISABLE_DEPRECATION_WARNINGS
1001 //if 1, we memcpy blocks in xvmcvideo
1002 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1003 ff_xvmc_pack_pblocks(s, cbp);
1008 FF_ENABLE_DEPRECATION_WARNINGS
1009 #endif /* FF_API_XVMC */
1011 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1012 if (s->flags2 & CODEC_FLAG2_FAST) {
1013 for (i = 0; i < 6; i++) {
1015 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1017 s->block_last_index[i] = -1;
1022 cbp <<= 12-mb_block_count;
1024 for (i = 0; i < mb_block_count; i++) {
1025 if (cbp & (1 << 11)) {
1026 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1029 s->block_last_index[i] = -1;
1035 if (s->flags2 & CODEC_FLAG2_FAST) {
1036 for (i = 0; i < 6; i++) {
1038 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1040 s->block_last_index[i] = -1;
1045 for (i = 0; i < 6; i++) {
1047 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1050 s->block_last_index[i] = -1;
1057 for (i = 0; i < 12; i++)
1058 s->block_last_index[i] = -1;
1062 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1067 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1069 Mpeg1Context *s = avctx->priv_data;
1070 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1073 /* we need some permutation to store matrices,
1074 * until MPV_common_init() sets the real permutation. */
1075 for (i = 0; i < 64; i++)
1076 s2->dsp.idct_permutation[i]=i;
1078 ff_MPV_decode_defaults(s2);
1080 s->mpeg_enc_ctx.avctx = avctx;
1081 s->mpeg_enc_ctx.flags = avctx->flags;
1082 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1083 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1084 ff_mpeg12_init_vlcs();
1086 s->mpeg_enc_ctx_allocated = 0;
1087 s->mpeg_enc_ctx.picture_number = 0;
1088 s->repeat_field = 0;
1089 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1090 avctx->color_range = AVCOL_RANGE_MPEG;
1091 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1092 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1094 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1098 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1100 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1101 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1104 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1107 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1108 if (err) return err;
1110 if (!ctx->mpeg_enc_ctx_allocated)
1111 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1113 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1114 s->picture_number++;
1119 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1120 const uint8_t *new_perm)
1122 uint16_t temp_matrix[64];
1125 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1127 for (i = 0; i < 64; i++) {
1128 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1132 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1134 #if CONFIG_MPEG_XVMC_DECODER
1135 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1136 AV_PIX_FMT_XVMC_MPEG2_MC,
1138 #endif /* FF_API_XVMC */
1139 #if CONFIG_MPEG1_VDPAU_HWACCEL
1140 AV_PIX_FMT_VDPAU_MPEG1,
1147 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1149 #if CONFIG_MPEG_XVMC_DECODER
1150 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1151 AV_PIX_FMT_XVMC_MPEG2_MC,
1153 #endif /* FF_API_XVMC */
1154 #if CONFIG_MPEG2_VDPAU_HWACCEL
1155 AV_PIX_FMT_VDPAU_MPEG2,
1158 #if CONFIG_MPEG2_DXVA2_HWACCEL
1159 AV_PIX_FMT_DXVA2_VLD,
1161 #if CONFIG_MPEG2_VAAPI_HWACCEL
1162 AV_PIX_FMT_VAAPI_VLD,
1168 static inline int uses_vdpau(AVCodecContext *avctx) {
1169 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1172 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1174 Mpeg1Context *s1 = avctx->priv_data;
1175 MpegEncContext *s = &s1->mpeg_enc_ctx;
1177 if(s->chroma_format < 2) {
1178 return ff_thread_get_format(avctx,
1179 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1180 mpeg1_hwaccel_pixfmt_list_420 :
1181 mpeg2_hwaccel_pixfmt_list_420);
1182 } else if(s->chroma_format == 2)
1183 return AV_PIX_FMT_YUV422P;
1185 return AV_PIX_FMT_YUV444P;
1188 static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
1191 FF_DISABLE_DEPRECATION_WARNINGS
1192 if (avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_IDCT && avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_MC) {
1193 avctx->xvmc_acceleration = 0;
1194 } else if (!avctx->xvmc_acceleration) {
1195 avctx->xvmc_acceleration = 2;
1197 FF_ENABLE_DEPRECATION_WARNINGS
1198 #endif /* FF_API_XVMC */
1199 avctx->hwaccel = ff_find_hwaccel(avctx);
1200 // until then pix_fmt may be changed right after codec init
1202 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1206 avctx->hwaccel || uses_vdpau(avctx))
1207 if (avctx->idct_algo == FF_IDCT_AUTO)
1208 avctx->idct_algo = FF_IDCT_SIMPLE;
1211 /* Call this function when we know all parameters.
1212 * It may be called in different places for MPEG-1 and MPEG-2. */
1213 static int mpeg_decode_postinit(AVCodecContext *avctx)
1215 Mpeg1Context *s1 = avctx->priv_data;
1216 MpegEncContext *s = &s1->mpeg_enc_ctx;
1217 uint8_t old_permutation[64];
1220 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1221 avctx->coded_width != s->width ||
1222 avctx->coded_height != s->height ||
1223 s1->save_width != s->width ||
1224 s1->save_height != s->height ||
1225 s1->save_aspect_info != s->aspect_ratio_info ||
1226 (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
1230 if (s1->mpeg_enc_ctx_allocated) {
1231 ParseContext pc = s->parse_context;
1232 s->parse_context.buffer = 0;
1233 ff_MPV_common_end(s);
1234 s->parse_context = pc;
1235 s1->mpeg_enc_ctx_allocated = 0;
1238 if ((s->width == 0) || (s->height == 0))
1241 ret = ff_set_dimensions(avctx, s->width, s->height);
1245 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1246 avctx->rc_max_rate = s->bit_rate;
1247 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1248 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1249 avctx->bit_rate = s->bit_rate;
1251 s1->save_aspect_info = s->aspect_ratio_info;
1252 s1->save_width = s->width;
1253 s1->save_height = s->height;
1254 s1->save_progressive_seq = s->progressive_sequence;
1256 /* low_delay may be forced, in this case we will have B-frames
1257 * that behave like P-frames. */
1258 avctx->has_b_frames = !s->low_delay;
1260 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1262 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1263 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1265 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1266 avctx->ticks_per_frame=1;
1269 av_reduce(&s->avctx->time_base.den,
1270 &s->avctx->time_base.num,
1271 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1272 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1274 avctx->ticks_per_frame = 2;
1276 if (s->aspect_ratio_info > 1) {
1278 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1279 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1280 (AVRational) {s->width, s->height});
1282 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1283 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1284 // issue1613, 621, 562
1285 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1286 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1287 s->avctx->sample_aspect_ratio =
1288 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1289 (AVRational) {s->width, s->height});
1291 s->avctx->sample_aspect_ratio =
1292 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1293 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1294 //issue1613 4/3 16/9 -> 16/9
1295 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1296 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1297 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1298 av_dlog(avctx, "A %d/%d\n",
1299 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1300 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1301 s->avctx->sample_aspect_ratio.den);
1304 s->avctx->sample_aspect_ratio =
1305 ff_mpeg2_aspect[s->aspect_ratio_info];
1309 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1310 setup_hwaccel_for_pixfmt(avctx);
1312 /* Quantization matrices may need reordering
1313 * if DCT permutation is changed. */
1314 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1316 if (ff_MPV_common_init(s) < 0)
1319 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1320 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1321 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1322 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1324 s1->mpeg_enc_ctx_allocated = 1;
1329 static int mpeg1_decode_picture(AVCodecContext *avctx,
1330 const uint8_t *buf, int buf_size)
1332 Mpeg1Context *s1 = avctx->priv_data;
1333 MpegEncContext *s = &s1->mpeg_enc_ctx;
1334 int ref, f_code, vbv_delay;
1336 init_get_bits(&s->gb, buf, buf_size*8);
1338 ref = get_bits(&s->gb, 10); /* temporal ref */
1339 s->pict_type = get_bits(&s->gb, 3);
1340 if (s->pict_type == 0 || s->pict_type > 3)
1343 vbv_delay = get_bits(&s->gb, 16);
1344 s->vbv_delay = vbv_delay;
1345 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1346 s->full_pel[0] = get_bits1(&s->gb);
1347 f_code = get_bits(&s->gb, 3);
1348 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1351 s->mpeg_f_code[0][0] = f_code;
1352 s->mpeg_f_code[0][1] = f_code;
1354 if (s->pict_type == AV_PICTURE_TYPE_B) {
1355 s->full_pel[1] = get_bits1(&s->gb);
1356 f_code = get_bits(&s->gb, 3);
1357 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1360 s->mpeg_f_code[1][0] = f_code;
1361 s->mpeg_f_code[1][1] = f_code;
1363 s->current_picture.f.pict_type = s->pict_type;
1364 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1366 if (avctx->debug & FF_DEBUG_PICT_INFO)
1367 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1374 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1376 MpegEncContext *s= &s1->mpeg_enc_ctx;
1377 int horiz_size_ext, vert_size_ext;
1380 skip_bits(&s->gb, 1); /* profile and level esc*/
1381 s->avctx->profile = get_bits(&s->gb, 3);
1382 s->avctx->level = get_bits(&s->gb, 4);
1383 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1384 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1385 horiz_size_ext = get_bits(&s->gb, 2);
1386 vert_size_ext = get_bits(&s->gb, 2);
1387 s->width |= (horiz_size_ext << 12);
1388 s->height |= (vert_size_ext << 12);
1389 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1390 s->bit_rate += (bit_rate_ext << 18) * 400;
1391 skip_bits1(&s->gb); /* marker */
1392 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1394 s->low_delay = get_bits1(&s->gb);
1395 if (s->flags & CODEC_FLAG_LOW_DELAY)
1398 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1399 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1401 av_dlog(s->avctx, "sequence extension\n");
1402 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1404 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1405 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%d\n",
1406 s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate);
1410 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1412 MpegEncContext *s = &s1->mpeg_enc_ctx;
1413 int color_description, w, h;
1415 skip_bits(&s->gb, 3); /* video format */
1416 color_description = get_bits1(&s->gb);
1417 if (color_description) {
1418 s->avctx->color_primaries = get_bits(&s->gb, 8);
1419 s->avctx->color_trc = get_bits(&s->gb, 8);
1420 s->avctx->colorspace = get_bits(&s->gb, 8);
1422 w = get_bits(&s->gb, 14);
1423 skip_bits(&s->gb, 1); //marker
1424 h = get_bits(&s->gb, 14);
1425 // remaining 3 bits are zero padding
1427 s1->pan_scan.width = 16 * w;
1428 s1->pan_scan.height = 16 * h;
1430 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1431 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1434 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1436 MpegEncContext *s = &s1->mpeg_enc_ctx;
1440 if (s->progressive_sequence) {
1441 if (s->repeat_first_field) {
1443 if (s->top_field_first)
1447 if (s->picture_structure == PICT_FRAME) {
1449 if (s->repeat_first_field)
1453 for (i = 0; i < nofco; i++) {
1454 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1455 skip_bits(&s->gb, 1); // marker
1456 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1457 skip_bits(&s->gb, 1); // marker
1460 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1461 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1462 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1463 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1464 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1467 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1471 for (i = 0; i < 64; i++) {
1472 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1473 int v = get_bits(&s->gb, 8);
1475 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1478 if (intra && i == 0 && v != 8) {
1479 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1480 v = 8; // needed by pink.mpg / issue1046
1489 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1491 av_dlog(s->avctx, "matrix extension\n");
1493 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1494 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1495 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1496 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1499 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1501 MpegEncContext *s = &s1->mpeg_enc_ctx;
1503 s->full_pel[0] = s->full_pel[1] = 0;
1504 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1505 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1506 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1507 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1508 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1509 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1510 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1511 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1512 s->pict_type = AV_PICTURE_TYPE_I;
1514 s->pict_type = AV_PICTURE_TYPE_P;
1516 s->pict_type = AV_PICTURE_TYPE_B;
1517 s->current_picture.f.pict_type = s->pict_type;
1518 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1520 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1521 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1522 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1523 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1525 s->intra_dc_precision = get_bits(&s->gb, 2);
1526 s->picture_structure = get_bits(&s->gb, 2);
1527 s->top_field_first = get_bits1(&s->gb);
1528 s->frame_pred_frame_dct = get_bits1(&s->gb);
1529 s->concealment_motion_vectors = get_bits1(&s->gb);
1530 s->q_scale_type = get_bits1(&s->gb);
1531 s->intra_vlc_format = get_bits1(&s->gb);
1532 s->alternate_scan = get_bits1(&s->gb);
1533 s->repeat_first_field = get_bits1(&s->gb);
1534 s->chroma_420_type = get_bits1(&s->gb);
1535 s->progressive_frame = get_bits1(&s->gb);
1538 if (s->alternate_scan) {
1539 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1540 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1542 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1543 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1546 /* composite display not parsed */
1547 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1548 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1549 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1550 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1551 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1552 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1553 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1554 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1555 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1558 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1560 AVCodecContext *avctx = s->avctx;
1561 Mpeg1Context *s1 = (Mpeg1Context*)s;
1563 /* start frame decoding */
1564 if (s->first_field || s->picture_structure == PICT_FRAME) {
1565 AVFrameSideData *pan_scan;
1567 if (ff_MPV_frame_start(s, avctx) < 0)
1570 ff_mpeg_er_frame_start(s);
1572 /* first check if we must repeat the frame */
1573 s->current_picture_ptr->f.repeat_pict = 0;
1574 if (s->repeat_first_field) {
1575 if (s->progressive_sequence) {
1576 if (s->top_field_first)
1577 s->current_picture_ptr->f.repeat_pict = 4;
1579 s->current_picture_ptr->f.repeat_pict = 2;
1580 } else if (s->progressive_frame) {
1581 s->current_picture_ptr->f.repeat_pict = 1;
1585 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1586 AV_FRAME_DATA_PANSCAN,
1587 sizeof(s1->pan_scan));
1589 return AVERROR(ENOMEM);
1590 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1592 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1593 ff_thread_finish_setup(avctx);
1594 } else { // second field
1597 if (!s->current_picture_ptr) {
1598 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1602 if (s->avctx->hwaccel &&
1603 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1604 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1605 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1608 for (i = 0; i < 4; i++) {
1609 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1610 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1611 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1616 if (avctx->hwaccel) {
1617 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1622 FF_DISABLE_DEPRECATION_WARNINGS
1623 // MPV_frame_start will call this function too,
1624 // but we need to call it on every field
1625 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1626 if (ff_xvmc_field_start(s, avctx) < 0)
1628 FF_ENABLE_DEPRECATION_WARNINGS
1629 #endif /* FF_API_XVMC */
1634 #define DECODE_SLICE_ERROR -1
1635 #define DECODE_SLICE_OK 0
1639 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1640 * @return DECODE_SLICE_ERROR if the slice is damaged,
1641 * DECODE_SLICE_OK if this slice is OK
1643 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1644 const uint8_t **buf, int buf_size)
1646 AVCodecContext *avctx = s->avctx;
1647 const int lowres = s->avctx->lowres;
1648 const int field_pic = s->picture_structure != PICT_FRAME;
1651 s->resync_mb_y = -1;
1653 av_assert0(mb_y < s->mb_height);
1655 init_get_bits(&s->gb, *buf, buf_size * 8);
1656 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1657 skip_bits(&s->gb, 3);
1659 ff_mpeg1_clean_buffers(s);
1660 s->interlaced_dct = 0;
1662 s->qscale = get_qscale(s);
1664 if (s->qscale == 0) {
1665 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1669 /* extra slice info */
1670 if (skip_1stop_8data_bits(&s->gb) < 0)
1671 return AVERROR_INVALIDDATA;
1675 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1678 while (get_bits_left(&s->gb) > 0) {
1679 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1680 MBINCR_VLC_BITS, 2);
1682 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1689 /* otherwise, stuffing, nothing to do */
1697 if (s->mb_x >= (unsigned)s->mb_width) {
1698 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1702 if (avctx->hwaccel) {
1703 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1704 int start_code = -1;
1705 buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1706 if (buf_end < *buf + buf_size)
1709 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1710 return DECODE_SLICE_ERROR;
1712 return DECODE_SLICE_OK;
1715 s->resync_mb_x = s->mb_x;
1716 s->resync_mb_y = s->mb_y = mb_y;
1718 ff_init_block_index(s);
1720 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1721 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1722 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",
1723 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],
1724 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")),
1725 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1726 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1727 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1733 FF_DISABLE_DEPRECATION_WARNINGS
1734 // If 1, we memcpy blocks in xvmcvideo.
1735 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1736 ff_xvmc_init_block(s); // set s->block
1737 FF_ENABLE_DEPRECATION_WARNINGS
1738 #endif /* FF_API_XVMC */
1740 if (mpeg_decode_mb(s, s->block) < 0)
1743 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1744 const int wrap = s->b8_stride;
1745 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1746 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1747 int motion_x, motion_y, dir, i;
1749 for (i = 0; i < 2; i++) {
1750 for (dir = 0; dir < 2; dir++) {
1751 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1752 motion_x = motion_y = 0;
1753 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1754 motion_x = s->mv[dir][0][0];
1755 motion_y = s->mv[dir][0][1];
1756 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1757 motion_x = s->mv[dir][i][0];
1758 motion_y = s->mv[dir][i][1];
1761 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1762 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1763 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1764 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1765 s->current_picture.ref_index [dir][b8_xy ] =
1766 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1767 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1774 s->dest[0] += 16 >> lowres;
1775 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1776 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1778 ff_MPV_decode_mb(s, s->block);
1780 if (++s->mb_x >= s->mb_width) {
1781 const int mb_size = 16 >> s->avctx->lowres;
1783 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1784 ff_MPV_report_decode_progress(s);
1787 s->mb_y += 1 << field_pic;
1789 if (s->mb_y >= s->mb_height) {
1790 int left = get_bits_left(&s->gb);
1791 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1792 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1793 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1795 if (left >= 32 && !is_d10) {
1796 GetBitContext gb = s->gb;
1797 align_get_bits(&gb);
1798 if (show_bits(&gb, 24) == 0x060E2B) {
1799 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1804 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1805 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1806 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1812 ff_init_block_index(s);
1815 /* skip mb handling */
1816 if (s->mb_skip_run == -1) {
1817 /* read increment again */
1820 int code = get_vlc2(&s->gb, ff_mbincr_vlc.table,
1821 MBINCR_VLC_BITS, 2);
1823 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1828 s->mb_skip_run += 33;
1829 } else if (code == 35) {
1830 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1831 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1834 goto eos; /* end of slice */
1836 /* otherwise, stuffing, nothing to do */
1838 s->mb_skip_run += code;
1842 if (s->mb_skip_run) {
1844 if (s->pict_type == AV_PICTURE_TYPE_I) {
1845 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1851 for (i = 0; i < 12; i++)
1852 s->block_last_index[i] = -1;
1853 if (s->picture_structure == PICT_FRAME)
1854 s->mv_type = MV_TYPE_16X16;
1856 s->mv_type = MV_TYPE_FIELD;
1857 if (s->pict_type == AV_PICTURE_TYPE_P) {
1858 /* if P type, zero motion vector is implied */
1859 s->mv_dir = MV_DIR_FORWARD;
1860 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1861 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1862 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1863 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1865 /* if B type, reuse previous vectors and directions */
1866 s->mv[0][0][0] = s->last_mv[0][0][0];
1867 s->mv[0][0][1] = s->last_mv[0][0][1];
1868 s->mv[1][0][0] = s->last_mv[1][0][0];
1869 s->mv[1][0][1] = s->last_mv[1][0][1];
1874 eos: // end of slice
1875 *buf += (get_bits_count(&s->gb)-1)/8;
1876 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1880 static int slice_decode_thread(AVCodecContext *c, void *arg)
1882 MpegEncContext *s = *(void**)arg;
1883 const uint8_t *buf = s->gb.buffer;
1884 int mb_y = s->start_mb_y;
1885 const int field_pic = s->picture_structure != PICT_FRAME;
1887 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1890 uint32_t start_code;
1893 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1895 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1896 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1897 s->start_mb_y, s->end_mb_y, s->er.error_count);
1899 if (c->err_recognition & AV_EF_EXPLODE)
1901 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1902 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);
1904 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);
1907 if (s->mb_y == s->end_mb_y)
1911 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1912 mb_y= start_code - SLICE_MIN_START_CODE;
1913 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1914 mb_y += (*buf&0xE0)<<2;
1916 if (s->picture_structure == PICT_BOTTOM_FIELD)
1918 if (mb_y < 0 || mb_y >= s->end_mb_y)
1924 * Handle slice ends.
1925 * @return 1 if it seems to be the last slice
1927 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1929 Mpeg1Context *s1 = avctx->priv_data;
1930 MpegEncContext *s = &s1->mpeg_enc_ctx;
1932 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1935 if (s->avctx->hwaccel) {
1936 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1937 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1941 FF_DISABLE_DEPRECATION_WARNINGS
1942 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1943 ff_xvmc_field_end(s);
1944 FF_ENABLE_DEPRECATION_WARNINGS
1945 #endif /* FF_API_XVMC */
1947 /* end of slice reached */
1948 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1951 ff_er_frame_end(&s->er);
1953 ff_MPV_frame_end(s);
1955 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1956 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1959 ff_print_debug_info(s, s->current_picture_ptr, pict);
1960 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1962 if (avctx->active_thread_type & FF_THREAD_FRAME)
1963 s->picture_number++;
1964 /* latency of 1 frame for I- and P-frames */
1965 /* XXX: use another variable than picture_number */
1966 if (s->last_picture_ptr != NULL) {
1967 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
1970 ff_print_debug_info(s, s->last_picture_ptr, pict);
1971 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
1981 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1982 const uint8_t *buf, int buf_size)
1984 Mpeg1Context *s1 = avctx->priv_data;
1985 MpegEncContext *s = &s1->mpeg_enc_ctx;
1989 init_get_bits(&s->gb, buf, buf_size*8);
1991 width = get_bits(&s->gb, 12);
1992 height = get_bits(&s->gb, 12);
1993 if (width == 0 || height == 0) {
1994 av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
1996 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1997 return AVERROR_INVALIDDATA;
1999 s->aspect_ratio_info = get_bits(&s->gb, 4);
2000 if (s->aspect_ratio_info == 0) {
2001 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2002 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2005 s->frame_rate_index = get_bits(&s->gb, 4);
2006 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2008 s->bit_rate = get_bits(&s->gb, 18) * 400;
2009 if (get_bits1(&s->gb) == 0) /* marker */
2014 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2015 skip_bits(&s->gb, 1);
2018 if (get_bits1(&s->gb)) {
2019 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2021 for (i = 0; i < 64; i++) {
2022 j = s->dsp.idct_permutation[i];
2023 v = ff_mpeg1_default_intra_matrix[i];
2024 s->intra_matrix[j] = v;
2025 s->chroma_intra_matrix[j] = v;
2028 if (get_bits1(&s->gb)) {
2029 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2031 for (i = 0; i < 64; i++) {
2032 int j = s->dsp.idct_permutation[i];
2033 v = ff_mpeg1_default_non_intra_matrix[i];
2034 s->inter_matrix[j] = v;
2035 s->chroma_inter_matrix[j] = v;
2039 if (show_bits(&s->gb, 23) != 0) {
2040 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2044 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2045 s->progressive_sequence = 1;
2046 s->progressive_frame = 1;
2047 s->picture_structure = PICT_FRAME;
2049 s->frame_pred_frame_dct = 1;
2050 s->chroma_format = 1;
2051 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2052 s->out_format = FMT_MPEG1;
2053 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2054 if (s->flags & CODEC_FLAG_LOW_DELAY)
2057 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2058 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2059 s->avctx->rc_buffer_size, s->bit_rate);
2064 static int vcr2_init_sequence(AVCodecContext *avctx)
2066 Mpeg1Context *s1 = avctx->priv_data;
2067 MpegEncContext *s = &s1->mpeg_enc_ctx;
2070 /* start new MPEG-1 context decoding */
2071 s->out_format = FMT_MPEG1;
2072 if (s1->mpeg_enc_ctx_allocated) {
2073 ff_MPV_common_end(s);
2074 s1->mpeg_enc_ctx_allocated = 0;
2076 s->width = avctx->coded_width;
2077 s->height = avctx->coded_height;
2078 avctx->has_b_frames = 0; // true?
2081 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2082 setup_hwaccel_for_pixfmt(avctx);
2084 if (ff_MPV_common_init(s) < 0)
2086 s1->mpeg_enc_ctx_allocated = 1;
2088 for (i = 0; i < 64; i++) {
2089 int j = s->dsp.idct_permutation[i];
2090 v = ff_mpeg1_default_intra_matrix[i];
2091 s->intra_matrix[j] = v;
2092 s->chroma_intra_matrix[j] = v;
2094 v = ff_mpeg1_default_non_intra_matrix[i];
2095 s->inter_matrix[j] = v;
2096 s->chroma_inter_matrix[j] = v;
2099 s->progressive_sequence = 1;
2100 s->progressive_frame = 1;
2101 s->picture_structure = PICT_FRAME;
2103 s->frame_pred_frame_dct = 1;
2104 s->chroma_format = 1;
2105 if (s->codec_tag == AV_RL32("BW10")) {
2106 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2108 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2109 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2111 s1->save_width = s->width;
2112 s1->save_height = s->height;
2113 s1->save_progressive_seq = s->progressive_sequence;
2118 static void mpeg_decode_user_data(AVCodecContext *avctx,
2119 const uint8_t *p, int buf_size)
2121 Mpeg1Context *s = avctx->priv_data;
2122 const uint8_t *buf_end = p + buf_size;
2127 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2131 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2132 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2134 av_log(avctx, AV_LOG_ERROR, "\n");*/
2137 /* we parse the DTG active format information */
2138 if (buf_end - p >= 5 &&
2139 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2147 if (buf_end - p < 1)
2149 avctx->dtg_active_format = p[0] & 0x0f;
2154 static void mpeg_decode_gop(AVCodecContext *avctx,
2155 const uint8_t *buf, int buf_size)
2157 Mpeg1Context *s1 = avctx->priv_data;
2158 MpegEncContext *s = &s1->mpeg_enc_ctx;
2162 init_get_bits(&s->gb, buf, buf_size*8);
2164 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2166 s->closed_gop = get_bits1(&s->gb);
2167 /*broken_link indicate that after editing the
2168 reference frames of the first B-Frames after GOP I-Frame
2169 are missing (open gop)*/
2170 broken_link = get_bits1(&s->gb);
2172 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2173 char tcbuf[AV_TIMECODE_STR_SIZE];
2174 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2175 av_log(s->avctx, AV_LOG_DEBUG,
2176 "GOP (%s) closed_gop=%d broken_link=%d\n",
2177 tcbuf, s->closed_gop, broken_link);
2181 static int decode_chunks(AVCodecContext *avctx,
2182 AVFrame *picture, int *got_output,
2183 const uint8_t *buf, int buf_size)
2185 Mpeg1Context *s = avctx->priv_data;
2186 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2187 const uint8_t *buf_ptr = buf;
2188 const uint8_t *buf_end = buf + buf_size;
2189 int ret, input_size;
2190 int last_code = 0, skip_frame = 0;
2191 int picture_start_code_seen = 0;
2194 /* find next start code */
2195 uint32_t start_code = -1;
2196 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2197 if (start_code > 0x1ff) {
2199 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2202 av_assert0(avctx->thread_count > 1);
2204 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2205 for (i = 0; i < s->slice_count; i++)
2206 s2->er.error_count += s2->thread_context[i]->er.error_count;
2209 if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
2210 && uses_vdpau(avctx))
2211 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2213 ret = slice_end(avctx, picture);
2217 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2223 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2224 return AVERROR_INVALIDDATA;
2226 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2229 input_size = buf_end - buf_ptr;
2231 if (avctx->debug & FF_DEBUG_STARTCODE) {
2232 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2235 /* prepare data for next start code */
2236 switch (start_code) {
2237 case SEQ_START_CODE:
2238 if (last_code == 0) {
2239 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2240 if(buf != avctx->extradata)
2243 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2244 if (avctx->err_recognition & AV_EF_EXPLODE)
2245 return AVERROR_INVALIDDATA;
2249 case PICTURE_START_CODE:
2250 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2251 /* If it's a frame picture, there can't be more than one picture header.
2252 Yet, it does happen and we need to handle it. */
2253 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2256 picture_start_code_seen = 1;
2258 if (s2->width <= 0 || s2->height <= 0) {
2259 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2260 s2->width, s2->height);
2261 return AVERROR_INVALIDDATA;
2265 s2->intra_dc_precision= 3;
2266 s2->intra_matrix[0]= 1;
2268 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2269 !avctx->hwaccel && s->slice_count) {
2272 avctx->execute(avctx, slice_decode_thread,
2273 s2->thread_context, NULL,
2274 s->slice_count, sizeof(void*));
2275 for (i = 0; i < s->slice_count; i++)
2276 s2->er.error_count += s2->thread_context[i]->er.error_count;
2279 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2280 ret = mpeg_decode_postinit(avctx);
2282 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2286 /* we have a complete image: we try to decompress it */
2287 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2289 s2->first_slice = 1;
2290 last_code = PICTURE_START_CODE;
2292 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2293 if (avctx->err_recognition & AV_EF_EXPLODE)
2294 return AVERROR_INVALIDDATA;
2297 case EXT_START_CODE:
2298 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2300 switch (get_bits(&s2->gb, 4)) {
2302 if (last_code == 0) {
2303 mpeg_decode_sequence_extension(s);
2305 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2306 if (avctx->err_recognition & AV_EF_EXPLODE)
2307 return AVERROR_INVALIDDATA;
2311 mpeg_decode_sequence_display_extension(s);
2314 mpeg_decode_quant_matrix_extension(s2);
2317 mpeg_decode_picture_display_extension(s);
2320 if (last_code == PICTURE_START_CODE) {
2321 mpeg_decode_picture_coding_extension(s);
2323 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2324 if (avctx->err_recognition & AV_EF_EXPLODE)
2325 return AVERROR_INVALIDDATA;
2330 case USER_START_CODE:
2331 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2333 case GOP_START_CODE:
2334 if (last_code == 0) {
2336 mpeg_decode_gop(avctx, buf_ptr, input_size);
2339 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2340 if (avctx->err_recognition & AV_EF_EXPLODE)
2341 return AVERROR_INVALIDDATA;
2345 if (start_code >= SLICE_MIN_START_CODE &&
2346 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2348 if (s2->progressive_sequence && !s2->progressive_frame) {
2349 s2->progressive_frame = 1;
2350 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2353 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2354 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2355 s2->picture_structure = PICT_FRAME;
2358 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2359 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2362 if (s2->picture_structure == PICT_FRAME) {
2363 s2->first_field = 0;
2364 s2->v_edge_pos = 16 * s2->mb_height;
2366 s2->first_field ^= 1;
2367 s2->v_edge_pos = 8 * s2->mb_height;
2368 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2371 if (start_code >= SLICE_MIN_START_CODE &&
2372 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2373 const int field_pic = s2->picture_structure != PICT_FRAME;
2374 int mb_y = start_code - SLICE_MIN_START_CODE;
2375 last_code = SLICE_MIN_START_CODE;
2376 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2377 mb_y += (*buf_ptr&0xE0)<<2;
2380 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2383 if (buf_end - buf_ptr < 2) {
2384 av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2385 return AVERROR_INVALIDDATA;
2388 if (mb_y >= s2->mb_height) {
2389 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2393 if (s2->last_picture_ptr == NULL) {
2394 /* Skip B-frames if we do not have reference frames and gop is not closed */
2395 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2396 if (!s2->closed_gop) {
2402 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2404 if (s2->next_picture_ptr == NULL) {
2405 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2406 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2411 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2412 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2413 avctx->skip_frame >= AVDISCARD_ALL) {
2418 if (!s->mpeg_enc_ctx_allocated)
2421 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2422 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2426 if (!s2->pict_type) {
2427 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2428 if (avctx->err_recognition & AV_EF_EXPLODE)
2429 return AVERROR_INVALIDDATA;
2433 if (s2->first_slice) {
2435 s2->first_slice = 0;
2436 if (mpeg_field_start(s2, buf, buf_size) < 0)
2439 if (!s2->current_picture_ptr) {
2440 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2441 return AVERROR_INVALIDDATA;
2444 if (uses_vdpau(avctx)) {
2449 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2451 int threshold = (s2->mb_height * s->slice_count +
2452 s2->slice_context_count / 2) /
2453 s2->slice_context_count;
2454 av_assert0(avctx->thread_count > 1);
2455 if (threshold <= mb_y) {
2456 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2458 thread_context->start_mb_y = mb_y;
2459 thread_context->end_mb_y = s2->mb_height;
2460 if (s->slice_count) {
2461 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2462 ret = ff_update_duplicate_context(thread_context,
2467 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2470 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2472 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2476 if (avctx->err_recognition & AV_EF_EXPLODE)
2478 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2479 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);
2481 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);
2490 static int mpeg_decode_frame(AVCodecContext *avctx,
2491 void *data, int *got_output,
2494 const uint8_t *buf = avpkt->data;
2496 int buf_size = avpkt->size;
2497 Mpeg1Context *s = avctx->priv_data;
2498 AVFrame *picture = data;
2499 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2500 av_dlog(avctx, "fill_buffer\n");
2502 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2503 /* special case for last picture */
2504 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2505 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2509 s2->next_picture_ptr = NULL;
2516 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2517 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2519 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2523 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2524 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2525 || s2->codec_tag == AV_RL32("BW10")
2527 vcr2_init_sequence(avctx);
2531 if (avctx->extradata && !s->extradata_decoded) {
2532 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2534 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2537 s->extradata_decoded = 1;
2538 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2539 s2->current_picture_ptr = NULL;
2544 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2545 if (ret<0 || *got_output)
2546 s2->current_picture_ptr = NULL;
2552 static void flush(AVCodecContext *avctx)
2554 Mpeg1Context *s = avctx->priv_data;
2558 ff_mpeg_flush(avctx);
2561 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2563 Mpeg1Context *s = avctx->priv_data;
2565 if (s->mpeg_enc_ctx_allocated)
2566 ff_MPV_common_end(&s->mpeg_enc_ctx);
2570 static const AVProfile mpeg2_video_profiles[] = {
2571 { FF_PROFILE_MPEG2_422, "4:2:2" },
2572 { FF_PROFILE_MPEG2_HIGH, "High" },
2573 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2574 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2575 { FF_PROFILE_MPEG2_MAIN, "Main" },
2576 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2577 { FF_PROFILE_RESERVED, "Reserved" },
2578 { FF_PROFILE_RESERVED, "Reserved" },
2579 { FF_PROFILE_UNKNOWN },
2583 AVCodec ff_mpeg1video_decoder = {
2584 .name = "mpeg1video",
2585 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2586 .type = AVMEDIA_TYPE_VIDEO,
2587 .id = AV_CODEC_ID_MPEG1VIDEO,
2588 .priv_data_size = sizeof(Mpeg1Context),
2589 .init = mpeg_decode_init,
2590 .close = mpeg_decode_end,
2591 .decode = mpeg_decode_frame,
2592 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2593 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2594 CODEC_CAP_SLICE_THREADS,
2597 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2600 AVCodec ff_mpeg2video_decoder = {
2601 .name = "mpeg2video",
2602 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2603 .type = AVMEDIA_TYPE_VIDEO,
2604 .id = AV_CODEC_ID_MPEG2VIDEO,
2605 .priv_data_size = sizeof(Mpeg1Context),
2606 .init = mpeg_decode_init,
2607 .close = mpeg_decode_end,
2608 .decode = mpeg_decode_frame,
2609 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2610 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2611 CODEC_CAP_SLICE_THREADS,
2614 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2618 AVCodec ff_mpegvideo_decoder = {
2619 .name = "mpegvideo",
2620 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2621 .type = AVMEDIA_TYPE_VIDEO,
2622 .id = AV_CODEC_ID_MPEG2VIDEO,
2623 .priv_data_size = sizeof(Mpeg1Context),
2624 .init = mpeg_decode_init,
2625 .close = mpeg_decode_end,
2626 .decode = mpeg_decode_frame,
2627 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2633 #if CONFIG_MPEG_XVMC_DECODER
2634 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2636 if (avctx->active_thread_type & FF_THREAD_SLICE)
2638 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2640 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2641 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2643 mpeg_decode_init(avctx);
2645 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2646 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2651 AVCodec ff_mpeg_xvmc_decoder = {
2652 .name = "mpegvideo_xvmc",
2653 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2654 .type = AVMEDIA_TYPE_VIDEO,
2655 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2656 .priv_data_size = sizeof(Mpeg1Context),
2657 .init = mpeg_mc_decode_init,
2658 .close = mpeg_decode_end,
2659 .decode = mpeg_decode_frame,
2660 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2661 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2666 #endif /* FF_API_XVMC */
2668 #if CONFIG_MPEG_VDPAU_DECODER
2669 AVCodec ff_mpeg_vdpau_decoder = {
2670 .name = "mpegvideo_vdpau",
2671 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2672 .type = AVMEDIA_TYPE_VIDEO,
2673 .id = AV_CODEC_ID_MPEG2VIDEO,
2674 .priv_data_size = sizeof(Mpeg1Context),
2675 .init = mpeg_decode_init,
2676 .close = mpeg_decode_end,
2677 .decode = mpeg_decode_frame,
2678 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2679 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2684 #if CONFIG_MPEG1_VDPAU_DECODER
2685 AVCodec ff_mpeg1_vdpau_decoder = {
2686 .name = "mpeg1video_vdpau",
2687 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2688 .type = AVMEDIA_TYPE_VIDEO,
2689 .id = AV_CODEC_ID_MPEG1VIDEO,
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_DR1 | CODEC_CAP_TRUNCATED |
2695 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,