3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 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
31 #include "libavutil/avassert.h"
32 #include "libavutil/timecode.h"
37 #include "mpegvideo.h"
38 #include "error_resilience.h"
40 #include "mpeg12data.h"
41 #include "mpeg12decdata.h"
42 #include "bytestream.h"
43 #include "vdpau_internal.h"
44 #include "xvmc_internal.h"
49 #define MBINCR_VLC_BITS 9
50 #define MB_PAT_VLC_BITS 9
51 #define MB_PTYPE_VLC_BITS 6
52 #define MB_BTYPE_VLC_BITS 6
56 /* as H.263, but only 17 codes */
57 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
59 int code, sign, val, shift;
61 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
69 sign = get_bits1(&s->gb);
73 val = (val - 1) << shift;
74 val |= get_bits(&s->gb, shift);
82 return sign_extend(val, 5 + shift);
85 static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
87 int level, dc, diff, i, j, run;
89 RLTable *rl = &ff_rl_mpeg1;
90 uint8_t * const scantable = s->intra_scantable.permutated;
91 const uint16_t *quant_matrix = s->intra_matrix;
92 const int qscale = s->qscale;
95 component = (n <= 3 ? 0 : n - 4 + 1);
96 diff = decode_dc(&s->gb, component);
99 dc = s->last_dc[component];
101 s->last_dc[component] = dc;
102 block[0] = dc * quant_matrix[0];
103 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
106 OPEN_READER(re, &s->gb);
107 /* now quantify & encode AC coefficients */
109 UPDATE_CACHE(re, &s->gb);
110 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
114 } else if (level != 0) {
117 level = (level * qscale * quant_matrix[j]) >> 4;
118 level = (level - 1) | 1;
119 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
120 LAST_SKIP_BITS(re, &s->gb, 1);
123 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
124 UPDATE_CACHE(re, &s->gb);
125 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
127 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
128 } else if (level == 0) {
129 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
135 level = (level * qscale * quant_matrix[j]) >> 4;
136 level = (level - 1) | 1;
139 level = (level * qscale * quant_matrix[j]) >> 4;
140 level = (level - 1) | 1;
144 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
150 CLOSE_READER(re, &s->gb);
152 s->block_last_index[n] = i;
156 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
158 return mpeg1_decode_block_intra(s, block, n);
161 static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
163 int level, i, j, run;
164 RLTable *rl = &ff_rl_mpeg1;
165 uint8_t * const scantable = s->intra_scantable.permutated;
166 const uint16_t *quant_matrix = s->inter_matrix;
167 const int qscale = s->qscale;
170 OPEN_READER(re, &s->gb);
172 // special case for first coefficient, no need to add second VLC table
173 UPDATE_CACHE(re, &s->gb);
174 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
175 level = (3 * qscale * quant_matrix[0]) >> 5;
176 level = (level - 1) | 1;
177 if (GET_CACHE(re, &s->gb) & 0x40000000)
181 SKIP_BITS(re, &s->gb, 2);
182 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
185 /* now quantify & encode AC coefficients */
187 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
192 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
193 level = (level - 1) | 1;
194 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
195 SKIP_BITS(re, &s->gb, 1);
198 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
199 UPDATE_CACHE(re, &s->gb);
200 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
202 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
203 } else if (level == 0) {
204 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
210 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
211 level = (level - 1) | 1;
214 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
215 level = (level - 1) | 1;
219 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
224 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
226 UPDATE_CACHE(re, &s->gb);
229 LAST_SKIP_BITS(re, &s->gb, 2);
230 CLOSE_READER(re, &s->gb);
232 s->block_last_index[n] = i;
237 * Note: this function can read out of range and crash for corrupt streams.
238 * Changing this would eat up any speed benefits it has.
239 * Do not use "fast" flag if you need the code to be robust.
241 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
243 int level, i, j, run;
244 RLTable *rl = &ff_rl_mpeg1;
245 uint8_t * const scantable = s->intra_scantable.permutated;
246 const int qscale = s->qscale;
249 OPEN_READER(re, &s->gb);
251 // special case for first coefficient, no need to add second VLC table
252 UPDATE_CACHE(re, &s->gb);
253 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
254 level = (3 * qscale) >> 1;
255 level = (level - 1) | 1;
256 if (GET_CACHE(re, &s->gb) & 0x40000000)
260 SKIP_BITS(re, &s->gb, 2);
261 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
265 /* now quantify & encode AC coefficients */
267 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
272 level = ((level * 2 + 1) * qscale) >> 1;
273 level = (level - 1) | 1;
274 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
275 SKIP_BITS(re, &s->gb, 1);
278 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
279 UPDATE_CACHE(re, &s->gb);
280 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
282 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
283 } else if (level == 0) {
284 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
290 level = ((level * 2 + 1) * qscale) >> 1;
291 level = (level - 1) | 1;
294 level = ((level * 2 + 1) * qscale) >> 1;
295 level = (level - 1) | 1;
300 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
302 UPDATE_CACHE(re, &s->gb);
305 LAST_SKIP_BITS(re, &s->gb, 2);
306 CLOSE_READER(re, &s->gb);
308 s->block_last_index[n] = i;
313 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
315 int level, i, j, run;
316 RLTable *rl = &ff_rl_mpeg1;
317 uint8_t * const scantable = s->intra_scantable.permutated;
318 const uint16_t *quant_matrix;
319 const int qscale = s->qscale;
325 OPEN_READER(re, &s->gb);
328 quant_matrix = s->inter_matrix;
330 quant_matrix = s->chroma_inter_matrix;
332 // special case for first coefficient, no need to add second VLC table
333 UPDATE_CACHE(re, &s->gb);
334 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
335 level= (3 * qscale * quant_matrix[0]) >> 5;
336 if (GET_CACHE(re, &s->gb) & 0x40000000)
341 SKIP_BITS(re, &s->gb, 2);
342 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
346 /* now quantify & encode AC coefficients */
348 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
353 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
354 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
355 SKIP_BITS(re, &s->gb, 1);
358 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
359 UPDATE_CACHE(re, &s->gb);
360 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
365 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
368 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
372 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
378 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
380 UPDATE_CACHE(re, &s->gb);
383 LAST_SKIP_BITS(re, &s->gb, 2);
384 CLOSE_READER(re, &s->gb);
386 block[63] ^= (mismatch & 1);
388 s->block_last_index[n] = i;
393 * Note: this function can read out of range and crash for corrupt streams.
394 * Changing this would eat up any speed benefits it has.
395 * Do not use "fast" flag if you need the code to be robust.
397 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
398 int16_t *block, int n)
400 int level, i, j, run;
401 RLTable *rl = &ff_rl_mpeg1;
402 uint8_t * const scantable = s->intra_scantable.permutated;
403 const int qscale = s->qscale;
404 OPEN_READER(re, &s->gb);
407 // special case for first coefficient, no need to add second VLC table
408 UPDATE_CACHE(re, &s->gb);
409 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
410 level = (3 * qscale) >> 1;
411 if (GET_CACHE(re, &s->gb) & 0x40000000)
415 SKIP_BITS(re, &s->gb, 2);
416 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
420 /* now quantify & encode AC coefficients */
422 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
427 level = ((level * 2 + 1) * qscale) >> 1;
428 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
429 SKIP_BITS(re, &s->gb, 1);
432 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
433 UPDATE_CACHE(re, &s->gb);
434 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
439 level = ((-level * 2 + 1) * qscale) >> 1;
442 level = ((level * 2 + 1) * qscale) >> 1;
447 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
449 UPDATE_CACHE(re, &s->gb);
452 LAST_SKIP_BITS(re, &s->gb, 2);
453 CLOSE_READER(re, &s->gb);
454 s->block_last_index[n] = i;
459 static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
461 int level, dc, diff, i, j, run;
464 uint8_t * const scantable = s->intra_scantable.permutated;
465 const uint16_t *quant_matrix;
466 const int qscale = s->qscale;
471 quant_matrix = s->intra_matrix;
474 quant_matrix = s->chroma_intra_matrix;
475 component = (n & 1) + 1;
477 diff = decode_dc(&s->gb, component);
480 dc = s->last_dc[component];
482 s->last_dc[component] = dc;
483 block[0] = dc << (3 - s->intra_dc_precision);
484 av_dlog(s->avctx, "dc=%d\n", block[0]);
485 mismatch = block[0] ^ 1;
487 if (s->intra_vlc_format)
493 OPEN_READER(re, &s->gb);
494 /* now quantify & encode AC coefficients */
496 UPDATE_CACHE(re, &s->gb);
497 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
501 } else if (level != 0) {
504 level = (level * qscale * quant_matrix[j]) >> 4;
505 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
506 LAST_SKIP_BITS(re, &s->gb, 1);
509 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
510 UPDATE_CACHE(re, &s->gb);
511 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
515 level = (-level * qscale * quant_matrix[j]) >> 4;
518 level = (level * qscale * quant_matrix[j]) >> 4;
522 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
529 CLOSE_READER(re, &s->gb);
531 block[63] ^= mismatch & 1;
533 s->block_last_index[n] = i;
538 * Note: this function can read out of range and crash for corrupt streams.
539 * Changing this would eat up any speed benefits it has.
540 * Do not use "fast" flag if you need the code to be robust.
542 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
544 int level, dc, diff, j, run;
547 uint8_t * scantable = s->intra_scantable.permutated;
548 const uint16_t *quant_matrix;
549 const int qscale = s->qscale;
553 quant_matrix = s->intra_matrix;
556 quant_matrix = s->chroma_intra_matrix;
557 component = (n & 1) + 1;
559 diff = decode_dc(&s->gb, component);
562 dc = s->last_dc[component];
564 s->last_dc[component] = dc;
565 block[0] = dc << (3 - s->intra_dc_precision);
566 if (s->intra_vlc_format)
572 OPEN_READER(re, &s->gb);
573 /* now quantify & encode AC coefficients */
575 UPDATE_CACHE(re, &s->gb);
576 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
580 } else if (level != 0) {
583 level = (level * qscale * quant_matrix[j]) >> 4;
584 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
585 LAST_SKIP_BITS(re, &s->gb, 1);
588 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
589 UPDATE_CACHE(re, &s->gb);
590 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
594 level = (-level * qscale * quant_matrix[j]) >> 4;
597 level = (level * qscale * quant_matrix[j]) >> 4;
603 CLOSE_READER(re, &s->gb);
606 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
610 uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
612 #define INIT_2D_VLC_RL(rl, static_size)\
614 static RL_VLC_ELEM rl_vlc_table[static_size];\
615 INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
616 &rl.table_vlc[0][1], 4, 2,\
617 &rl.table_vlc[0][0], 4, 2, static_size);\
619 rl.rl_vlc[0] = rl_vlc_table;\
620 init_2d_vlc_rl(&rl);\
623 static void init_2d_vlc_rl(RLTable *rl)
627 for (i = 0; i < rl->vlc.table_size; i++) {
628 int code = rl->vlc.table[i][0];
629 int len = rl->vlc.table[i][1];
632 if (len == 0) { // illegal code
635 } else if (len<0) { //more bits needed
639 if (code == rl->n) { //esc
642 } else if (code == rl->n+1) { //eob
646 run = rl->table_run [code] + 1;
647 level = rl->table_level[code];
650 rl->rl_vlc[0][i].len = len;
651 rl->rl_vlc[0][i].level = level;
652 rl->rl_vlc[0][i].run = run;
656 void ff_mpeg12_common_init(MpegEncContext *s)
659 s->y_dc_scale_table =
660 s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
664 void ff_mpeg1_clean_buffers(MpegEncContext *s)
666 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
667 s->last_dc[1] = s->last_dc[0];
668 s->last_dc[2] = s->last_dc[0];
669 memset(s->last_mv, 0, sizeof(s->last_mv));
673 /******************************************/
677 VLC ff_dc_chroma_vlc;
679 static VLC mbincr_vlc;
680 static VLC mb_ptype_vlc;
681 static VLC mb_btype_vlc;
682 static VLC mb_pat_vlc;
684 av_cold void ff_mpeg12_init_vlcs(void)
691 INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
692 ff_mpeg12_vlc_dc_lum_bits, 1, 1,
693 ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
694 INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
695 ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
696 ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
697 INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
698 &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
699 &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
700 INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
701 &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
702 &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
703 INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
704 &ff_mpeg12_mbPatTable[0][1], 2, 1,
705 &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
707 INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
708 &table_mb_ptype[0][1], 2, 1,
709 &table_mb_ptype[0][0], 2, 1, 64);
710 INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
711 &table_mb_btype[0][1], 2, 1,
712 &table_mb_btype[0][0], 2, 1, 64);
713 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
714 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
716 INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
717 INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
721 static inline int get_dmv(MpegEncContext *s)
723 if (get_bits1(&s->gb))
724 return 1 - (get_bits1(&s->gb) << 1);
729 static inline int get_qscale(MpegEncContext *s)
731 int qscale = get_bits(&s->gb, 5);
732 if (s->q_scale_type) {
733 return non_linear_qscale[qscale];
739 static void exchange_uv(MpegEncContext *s)
744 s->pblocks[4] = s->pblocks[5];
748 /* motion type (for MPEG-2) */
754 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
756 int i, j, k, cbp, val, mb_type, motion_type;
757 const int mb_block_count = 4 + (1 << s->chroma_format);
759 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
761 av_assert2(s->mb_skipped == 0);
763 if (s->mb_skip_run-- != 0) {
764 if (s->pict_type == AV_PICTURE_TYPE_P) {
766 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
771 mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
773 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
774 if (IS_INTRA(mb_type)) {
775 av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
778 s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
779 mb_type | MB_TYPE_SKIP;
781 // assert(s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
783 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
790 switch (s->pict_type) {
792 case AV_PICTURE_TYPE_I:
793 if (get_bits1(&s->gb) == 0) {
794 if (get_bits1(&s->gb) == 0) {
795 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
798 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
800 mb_type = MB_TYPE_INTRA;
803 case AV_PICTURE_TYPE_P:
804 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
806 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
809 mb_type = ptype2mb_type[mb_type];
811 case AV_PICTURE_TYPE_B:
812 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
814 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
817 mb_type = btype2mb_type[mb_type];
820 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
821 // motion_type = 0; /* avoid warning */
822 if (IS_INTRA(mb_type)) {
823 s->dsp.clear_blocks(s->block[0]);
825 if (!s->chroma_y_shift) {
826 s->dsp.clear_blocks(s->block[6]);
829 /* compute DCT type */
830 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
831 !s->frame_pred_frame_dct) {
832 s->interlaced_dct = get_bits1(&s->gb);
835 if (IS_QUANT(mb_type))
836 s->qscale = get_qscale(s);
838 if (s->concealment_motion_vectors) {
839 /* just parse them */
840 if (s->picture_structure != PICT_FRAME)
841 skip_bits1(&s->gb); /* field select */
843 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
844 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
845 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
846 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
848 skip_bits1(&s->gb); /* marker */
850 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
852 // if 1, we memcpy blocks in xvmcvideo
853 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
854 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
860 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
861 if (s->flags2 & CODEC_FLAG2_FAST) {
862 for (i = 0; i < 6; i++) {
863 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
866 for (i = 0; i < mb_block_count; i++) {
867 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
872 for (i = 0; i < 6; i++) {
873 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
878 if (mb_type & MB_TYPE_ZERO_MV) {
879 av_assert2(mb_type & MB_TYPE_CBP);
881 s->mv_dir = MV_DIR_FORWARD;
882 if (s->picture_structure == PICT_FRAME) {
883 if (s->picture_structure == PICT_FRAME
884 && !s->frame_pred_frame_dct)
885 s->interlaced_dct = get_bits1(&s->gb);
886 s->mv_type = MV_TYPE_16X16;
888 s->mv_type = MV_TYPE_FIELD;
889 mb_type |= MB_TYPE_INTERLACED;
890 s->field_select[0][0] = s->picture_structure - 1;
893 if (IS_QUANT(mb_type))
894 s->qscale = get_qscale(s);
896 s->last_mv[0][0][0] = 0;
897 s->last_mv[0][0][1] = 0;
898 s->last_mv[0][1][0] = 0;
899 s->last_mv[0][1][1] = 0;
903 av_assert2(mb_type & MB_TYPE_L0L1);
904 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
905 /* get additional motion vector type */
906 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
907 motion_type = MT_FRAME;
909 motion_type = get_bits(&s->gb, 2);
910 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
911 s->interlaced_dct = get_bits1(&s->gb);
914 if (IS_QUANT(mb_type))
915 s->qscale = get_qscale(s);
918 s->mv_dir = (mb_type >> 13) & 3;
919 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
920 switch (motion_type) {
921 case MT_FRAME: /* or MT_16X8 */
922 if (s->picture_structure == PICT_FRAME) {
923 mb_type |= MB_TYPE_16x16;
924 s->mv_type = MV_TYPE_16X16;
925 for (i = 0; i < 2; i++) {
926 if (USES_LIST(mb_type, i)) {
928 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
929 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
930 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
931 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
932 /* full_pel: only for MPEG-1 */
933 if (s->full_pel[i]) {
934 s->mv[i][0][0] <<= 1;
935 s->mv[i][0][1] <<= 1;
940 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
941 s->mv_type = MV_TYPE_16X8;
942 for (i = 0; i < 2; i++) {
943 if (USES_LIST(mb_type, i)) {
945 for (j = 0; j < 2; j++) {
946 s->field_select[i][j] = get_bits1(&s->gb);
947 for (k = 0; k < 2; k++) {
948 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
949 s->last_mv[i][j][k]);
950 s->last_mv[i][j][k] = val;
951 s->mv[i][j][k] = val;
959 s->mv_type = MV_TYPE_FIELD;
960 if (s->picture_structure == PICT_FRAME) {
961 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
962 for (i = 0; i < 2; i++) {
963 if (USES_LIST(mb_type, i)) {
964 for (j = 0; j < 2; j++) {
965 s->field_select[i][j] = get_bits1(&s->gb);
966 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
967 s->last_mv[i][j][0]);
968 s->last_mv[i][j][0] = val;
969 s->mv[i][j][0] = val;
970 av_dlog(s->avctx, "fmx=%d\n", val);
971 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
972 s->last_mv[i][j][1] >> 1);
973 s->last_mv[i][j][1] = val << 1;
974 s->mv[i][j][1] = val;
975 av_dlog(s->avctx, "fmy=%d\n", val);
980 av_assert0(!s->progressive_sequence);
981 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
982 for (i = 0; i < 2; i++) {
983 if (USES_LIST(mb_type, i)) {
984 s->field_select[i][0] = get_bits1(&s->gb);
985 for (k = 0; k < 2; k++) {
986 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
987 s->last_mv[i][0][k]);
988 s->last_mv[i][0][k] = val;
989 s->last_mv[i][1][k] = val;
990 s->mv[i][0][k] = val;
997 if(s->progressive_sequence){
998 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
1001 s->mv_type = MV_TYPE_DMV;
1002 for (i = 0; i < 2; i++) {
1003 if (USES_LIST(mb_type, i)) {
1004 int dmx, dmy, mx, my, m;
1005 const int my_shift = s->picture_structure == PICT_FRAME;
1007 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1008 s->last_mv[i][0][0]);
1009 s->last_mv[i][0][0] = mx;
1010 s->last_mv[i][1][0] = mx;
1012 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1013 s->last_mv[i][0][1] >> my_shift);
1017 s->last_mv[i][0][1] = my << my_shift;
1018 s->last_mv[i][1][1] = my << my_shift;
1020 s->mv[i][0][0] = mx;
1021 s->mv[i][0][1] = my;
1022 s->mv[i][1][0] = mx; // not used
1023 s->mv[i][1][1] = my; // not used
1025 if (s->picture_structure == PICT_FRAME) {
1026 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1028 // m = 1 + 2 * s->top_field_first;
1029 m = s->top_field_first ? 1 : 3;
1031 /* top -> top pred */
1032 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1033 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1035 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1036 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1038 mb_type |= MB_TYPE_16x16;
1040 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1041 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1042 if (s->picture_structure == PICT_TOP_FIELD)
1051 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1057 if (HAS_CBP(mb_type)) {
1058 s->dsp.clear_blocks(s->block[0]);
1060 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1061 if (mb_block_count > 6) {
1062 cbp <<= mb_block_count - 6;
1063 cbp |= get_bits(&s->gb, mb_block_count - 6);
1064 s->dsp.clear_blocks(s->block[6]);
1067 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
1071 //if 1, we memcpy blocks in xvmcvideo
1072 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1073 ff_xvmc_pack_pblocks(s, cbp);
1079 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1080 if (s->flags2 & CODEC_FLAG2_FAST) {
1081 for (i = 0; i < 6; i++) {
1083 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1085 s->block_last_index[i] = -1;
1090 cbp <<= 12-mb_block_count;
1092 for (i = 0; i < mb_block_count; i++) {
1093 if (cbp & (1 << 11)) {
1094 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1097 s->block_last_index[i] = -1;
1103 if (s->flags2 & CODEC_FLAG2_FAST) {
1104 for (i = 0; i < 6; i++) {
1106 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1108 s->block_last_index[i] = -1;
1113 for (i = 0; i < 6; i++) {
1115 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1118 s->block_last_index[i] = -1;
1125 for (i = 0; i < 12; i++)
1126 s->block_last_index[i] = -1;
1130 s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1135 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1137 Mpeg1Context *s = avctx->priv_data;
1138 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1141 /* we need some permutation to store matrices,
1142 * until MPV_common_init() sets the real permutation. */
1143 for (i = 0; i < 64; i++)
1144 s2->dsp.idct_permutation[i]=i;
1146 ff_MPV_decode_defaults(s2);
1148 s->mpeg_enc_ctx.avctx = avctx;
1149 s->mpeg_enc_ctx.flags = avctx->flags;
1150 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1151 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1152 ff_mpeg12_init_vlcs();
1154 s->mpeg_enc_ctx_allocated = 0;
1155 s->mpeg_enc_ctx.picture_number = 0;
1156 s->repeat_field = 0;
1157 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1158 avctx->color_range = AVCOL_RANGE_MPEG;
1159 if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO)
1160 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1162 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1166 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1168 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1169 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1172 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1175 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1176 if (err) return err;
1178 if (!ctx->mpeg_enc_ctx_allocated)
1179 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1181 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1182 s->picture_number++;
1187 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1188 const uint8_t *new_perm)
1190 uint16_t temp_matrix[64];
1193 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1195 for (i = 0; i < 64; i++) {
1196 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1200 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1201 #if CONFIG_MPEG_XVMC_DECODER
1202 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1203 AV_PIX_FMT_XVMC_MPEG2_MC,
1205 #if CONFIG_MPEG1_VDPAU_HWACCEL
1206 AV_PIX_FMT_VDPAU_MPEG1,
1212 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1213 #if CONFIG_MPEG_XVMC_DECODER
1214 AV_PIX_FMT_XVMC_MPEG2_IDCT,
1215 AV_PIX_FMT_XVMC_MPEG2_MC,
1217 #if CONFIG_MPEG2_VDPAU_HWACCEL
1218 AV_PIX_FMT_VDPAU_MPEG2,
1220 #if CONFIG_MPEG2_DXVA2_HWACCEL
1221 AV_PIX_FMT_DXVA2_VLD,
1223 #if CONFIG_MPEG2_VAAPI_HWACCEL
1224 AV_PIX_FMT_VAAPI_VLD,
1230 static inline int uses_vdpau(AVCodecContext *avctx) {
1231 return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2;
1234 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1236 Mpeg1Context *s1 = avctx->priv_data;
1237 MpegEncContext *s = &s1->mpeg_enc_ctx;
1239 if(s->chroma_format < 2) {
1240 enum AVPixelFormat res;
1241 res = avctx->get_format(avctx,
1242 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
1243 mpeg1_hwaccel_pixfmt_list_420 :
1244 mpeg2_hwaccel_pixfmt_list_420);
1245 if (res != AV_PIX_FMT_XVMC_MPEG2_IDCT && res != AV_PIX_FMT_XVMC_MPEG2_MC) {
1246 avctx->xvmc_acceleration = 0;
1247 } else if (!avctx->xvmc_acceleration) {
1248 avctx->xvmc_acceleration = 2;
1251 } else if(s->chroma_format == 2)
1252 return AV_PIX_FMT_YUV422P;
1254 return AV_PIX_FMT_YUV444P;
1257 /* Call this function when we know all parameters.
1258 * It may be called in different places for MPEG-1 and MPEG-2. */
1259 static int mpeg_decode_postinit(AVCodecContext *avctx)
1261 Mpeg1Context *s1 = avctx->priv_data;
1262 MpegEncContext *s = &s1->mpeg_enc_ctx;
1263 uint8_t old_permutation[64];
1265 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1266 avctx->coded_width != s->width ||
1267 avctx->coded_height != s->height ||
1268 s1->save_width != s->width ||
1269 s1->save_height != s->height ||
1270 s1->save_aspect_info != s->aspect_ratio_info ||
1271 s1->save_progressive_seq != s->progressive_sequence ||
1275 if (s1->mpeg_enc_ctx_allocated) {
1276 ParseContext pc = s->parse_context;
1277 s->parse_context.buffer = 0;
1278 ff_MPV_common_end(s);
1279 s->parse_context = pc;
1282 if ((s->width == 0) || (s->height == 0))
1285 avcodec_set_dimensions(avctx, s->width, s->height);
1286 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) {
1287 avctx->rc_max_rate = s->bit_rate;
1288 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate &&
1289 (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) {
1290 avctx->bit_rate = s->bit_rate;
1292 s1->save_aspect_info = s->aspect_ratio_info;
1293 s1->save_width = s->width;
1294 s1->save_height = s->height;
1295 s1->save_progressive_seq = s->progressive_sequence;
1297 /* low_delay may be forced, in this case we will have B-frames
1298 * that behave like P-frames. */
1299 avctx->has_b_frames = !s->low_delay;
1301 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1303 avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num;
1304 avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den;
1306 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1307 avctx->ticks_per_frame=1;
1310 av_reduce(&s->avctx->time_base.den,
1311 &s->avctx->time_base.num,
1312 ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1313 ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1315 avctx->ticks_per_frame = 2;
1317 if (s->aspect_ratio_info > 1) {
1319 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1320 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1321 (AVRational) {s->width, s->height});
1323 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1324 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1325 // issue1613, 621, 562
1326 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1327 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1328 s->avctx->sample_aspect_ratio =
1329 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1330 (AVRational) {s->width, s->height});
1332 s->avctx->sample_aspect_ratio =
1333 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1334 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1335 //issue1613 4/3 16/9 -> 16/9
1336 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1337 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1338 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1339 av_dlog(avctx, "A %d/%d\n",
1340 ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1341 av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num,
1342 s->avctx->sample_aspect_ratio.den);
1345 s->avctx->sample_aspect_ratio =
1346 ff_mpeg2_aspect[s->aspect_ratio_info];
1350 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1351 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1352 // until then pix_fmt may be changed right after codec init
1353 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT ||
1354 avctx->hwaccel || uses_vdpau(avctx))
1355 if (avctx->idct_algo == FF_IDCT_AUTO)
1356 avctx->idct_algo = FF_IDCT_SIMPLE;
1358 /* Quantization matrices may need reordering
1359 * if DCT permutation is changed. */
1360 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1362 if (ff_MPV_common_init(s) < 0)
1365 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1366 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1367 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1368 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1370 s1->mpeg_enc_ctx_allocated = 1;
1375 static int mpeg1_decode_picture(AVCodecContext *avctx,
1376 const uint8_t *buf, int buf_size)
1378 Mpeg1Context *s1 = avctx->priv_data;
1379 MpegEncContext *s = &s1->mpeg_enc_ctx;
1380 int ref, f_code, vbv_delay;
1382 init_get_bits(&s->gb, buf, buf_size*8);
1384 ref = get_bits(&s->gb, 10); /* temporal ref */
1385 s->pict_type = get_bits(&s->gb, 3);
1386 if (s->pict_type == 0 || s->pict_type > 3)
1389 vbv_delay = get_bits(&s->gb, 16);
1390 s->vbv_delay = vbv_delay;
1391 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1392 s->full_pel[0] = get_bits1(&s->gb);
1393 f_code = get_bits(&s->gb, 3);
1394 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1397 s->mpeg_f_code[0][0] = f_code;
1398 s->mpeg_f_code[0][1] = f_code;
1400 if (s->pict_type == AV_PICTURE_TYPE_B) {
1401 s->full_pel[1] = get_bits1(&s->gb);
1402 f_code = get_bits(&s->gb, 3);
1403 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1406 s->mpeg_f_code[1][0] = f_code;
1407 s->mpeg_f_code[1][1] = f_code;
1409 s->current_picture.f.pict_type = s->pict_type;
1410 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1412 if (avctx->debug & FF_DEBUG_PICT_INFO)
1413 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1420 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1422 MpegEncContext *s= &s1->mpeg_enc_ctx;
1423 int horiz_size_ext, vert_size_ext;
1426 skip_bits(&s->gb, 1); /* profile and level esc*/
1427 s->avctx->profile = get_bits(&s->gb, 3);
1428 s->avctx->level = get_bits(&s->gb, 4);
1429 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1430 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1431 horiz_size_ext = get_bits(&s->gb, 2);
1432 vert_size_ext = get_bits(&s->gb, 2);
1433 s->width |= (horiz_size_ext << 12);
1434 s->height |= (vert_size_ext << 12);
1435 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1436 s->bit_rate += (bit_rate_ext << 18) * 400;
1437 skip_bits1(&s->gb); /* marker */
1438 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1440 s->low_delay = get_bits1(&s->gb);
1441 if (s->flags & CODEC_FLAG_LOW_DELAY)
1444 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1445 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1447 av_dlog(s->avctx, "sequence extension\n");
1448 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1450 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1451 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1452 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1456 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1458 MpegEncContext *s = &s1->mpeg_enc_ctx;
1459 int color_description, w, h;
1461 skip_bits(&s->gb, 3); /* video format */
1462 color_description = get_bits1(&s->gb);
1463 if (color_description) {
1464 s->avctx->color_primaries = get_bits(&s->gb, 8);
1465 s->avctx->color_trc = get_bits(&s->gb, 8);
1466 s->avctx->colorspace = get_bits(&s->gb, 8);
1468 w = get_bits(&s->gb, 14);
1469 skip_bits(&s->gb, 1); //marker
1470 h = get_bits(&s->gb, 14);
1471 // remaining 3 bits are zero padding
1473 s1->pan_scan.width = 16 * w;
1474 s1->pan_scan.height = 16 * h;
1476 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1477 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1480 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1482 MpegEncContext *s = &s1->mpeg_enc_ctx;
1486 if (s->progressive_sequence) {
1487 if (s->repeat_first_field) {
1489 if (s->top_field_first)
1493 if (s->picture_structure == PICT_FRAME) {
1495 if (s->repeat_first_field)
1499 for (i = 0; i < nofco; i++) {
1500 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1501 skip_bits(&s->gb, 1); // marker
1502 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1503 skip_bits(&s->gb, 1); // marker
1506 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1507 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1508 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1509 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1510 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1513 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1517 for (i = 0; i < 64; i++) {
1518 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1519 int v = get_bits(&s->gb, 8);
1521 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1524 if (intra && i == 0 && v != 8) {
1525 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1526 v = 8; // needed by pink.mpg / issue1046
1535 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1537 av_dlog(s->avctx, "matrix extension\n");
1539 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1540 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1541 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1542 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1545 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1547 MpegEncContext *s = &s1->mpeg_enc_ctx;
1549 s->full_pel[0] = s->full_pel[1] = 0;
1550 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1551 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1552 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1553 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1554 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1555 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1556 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1557 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1558 s->pict_type = AV_PICTURE_TYPE_I;
1560 s->pict_type = AV_PICTURE_TYPE_P;
1562 s->pict_type = AV_PICTURE_TYPE_B;
1563 s->current_picture.f.pict_type = s->pict_type;
1564 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1566 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1567 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1568 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1569 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1571 s->intra_dc_precision = get_bits(&s->gb, 2);
1572 s->picture_structure = get_bits(&s->gb, 2);
1573 s->top_field_first = get_bits1(&s->gb);
1574 s->frame_pred_frame_dct = get_bits1(&s->gb);
1575 s->concealment_motion_vectors = get_bits1(&s->gb);
1576 s->q_scale_type = get_bits1(&s->gb);
1577 s->intra_vlc_format = get_bits1(&s->gb);
1578 s->alternate_scan = get_bits1(&s->gb);
1579 s->repeat_first_field = get_bits1(&s->gb);
1580 s->chroma_420_type = get_bits1(&s->gb);
1581 s->progressive_frame = get_bits1(&s->gb);
1584 if (s->alternate_scan) {
1585 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1586 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1588 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1589 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1592 /* composite display not parsed */
1593 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1594 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1595 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1596 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1597 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1598 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1599 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1600 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1601 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1604 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1606 AVCodecContext *avctx = s->avctx;
1607 Mpeg1Context *s1 = (Mpeg1Context*)s;
1609 /* start frame decoding */
1610 if (s->first_field || s->picture_structure == PICT_FRAME) {
1611 AVFrameSideData *pan_scan;
1613 if (ff_MPV_frame_start(s, avctx) < 0)
1616 ff_mpeg_er_frame_start(s);
1618 /* first check if we must repeat the frame */
1619 s->current_picture_ptr->f.repeat_pict = 0;
1620 if (s->repeat_first_field) {
1621 if (s->progressive_sequence) {
1622 if (s->top_field_first)
1623 s->current_picture_ptr->f.repeat_pict = 4;
1625 s->current_picture_ptr->f.repeat_pict = 2;
1626 } else if (s->progressive_frame) {
1627 s->current_picture_ptr->f.repeat_pict = 1;
1631 pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
1632 AV_FRAME_DATA_PANSCAN,
1633 sizeof(s1->pan_scan));
1635 return AVERROR(ENOMEM);
1636 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1638 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1639 ff_thread_finish_setup(avctx);
1640 } else { // second field
1643 if (!s->current_picture_ptr) {
1644 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1648 if (s->avctx->hwaccel &&
1649 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1650 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1651 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1654 for (i = 0; i < 4; i++) {
1655 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1656 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1657 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1662 if (avctx->hwaccel) {
1663 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1667 // MPV_frame_start will call this function too,
1668 // but we need to call it on every field
1669 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1670 if (ff_xvmc_field_start(s, avctx) < 0)
1676 #define DECODE_SLICE_ERROR -1
1677 #define DECODE_SLICE_OK 0
1681 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1682 * @return DECODE_SLICE_ERROR if the slice is damaged,
1683 * DECODE_SLICE_OK if this slice is OK
1685 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1686 const uint8_t **buf, int buf_size)
1688 AVCodecContext *avctx = s->avctx;
1689 const int lowres = s->avctx->lowres;
1690 const int field_pic = s->picture_structure != PICT_FRAME;
1693 s->resync_mb_y = -1;
1695 av_assert0(mb_y < s->mb_height);
1697 init_get_bits(&s->gb, *buf, buf_size * 8);
1698 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1699 skip_bits(&s->gb, 3);
1701 ff_mpeg1_clean_buffers(s);
1702 s->interlaced_dct = 0;
1704 s->qscale = get_qscale(s);
1706 if (s->qscale == 0) {
1707 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1711 /* extra slice info */
1712 while (get_bits1(&s->gb) != 0) {
1713 skip_bits(&s->gb, 8);
1718 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1721 while (get_bits_left(&s->gb) > 0) {
1722 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1724 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1731 /* otherwise, stuffing, nothing to do */
1739 if (s->mb_x >= (unsigned)s->mb_width) {
1740 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1744 if (avctx->hwaccel) {
1745 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1746 int start_code = -1;
1747 buf_end = avpriv_mpv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1748 if (buf_end < *buf + buf_size)
1751 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1752 return DECODE_SLICE_ERROR;
1754 return DECODE_SLICE_OK;
1757 s->resync_mb_x = s->mb_x;
1758 s->resync_mb_y = s->mb_y = mb_y;
1760 ff_init_block_index(s);
1762 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1763 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1764 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",
1765 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],
1766 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")),
1767 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1768 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1769 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1774 // If 1, we memcpy blocks in xvmcvideo.
1775 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1776 ff_xvmc_init_block(s); // set s->block
1778 if (mpeg_decode_mb(s, s->block) < 0)
1781 if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1782 const int wrap = s->b8_stride;
1783 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1784 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1785 int motion_x, motion_y, dir, i;
1787 for (i = 0; i < 2; i++) {
1788 for (dir = 0; dir < 2; dir++) {
1789 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1790 motion_x = motion_y = 0;
1791 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1792 motion_x = s->mv[dir][0][0];
1793 motion_y = s->mv[dir][0][1];
1794 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1795 motion_x = s->mv[dir][i][0];
1796 motion_y = s->mv[dir][i][1];
1799 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1800 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1801 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1802 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1803 s->current_picture.ref_index [dir][b8_xy ] =
1804 s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1805 av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1812 s->dest[0] += 16 >> lowres;
1813 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1814 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1816 ff_MPV_decode_mb(s, s->block);
1818 if (++s->mb_x >= s->mb_width) {
1819 const int mb_size = 16 >> s->avctx->lowres;
1821 ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1822 ff_MPV_report_decode_progress(s);
1825 s->mb_y += 1 << field_pic;
1827 if (s->mb_y >= s->mb_height) {
1828 int left = get_bits_left(&s->gb);
1829 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1830 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1831 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1833 if (left >= 32 && !is_d10) {
1834 GetBitContext gb = s->gb;
1835 align_get_bits(&gb);
1836 if (show_bits(&gb, 24) == 0x060E2B) {
1837 av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1842 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1843 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1844 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1850 ff_init_block_index(s);
1853 /* skip mb handling */
1854 if (s->mb_skip_run == -1) {
1855 /* read increment again */
1858 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1860 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1865 s->mb_skip_run += 33;
1866 } else if (code == 35) {
1867 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1868 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1871 goto eos; /* end of slice */
1873 /* otherwise, stuffing, nothing to do */
1875 s->mb_skip_run += code;
1879 if (s->mb_skip_run) {
1881 if (s->pict_type == AV_PICTURE_TYPE_I) {
1882 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1888 for (i = 0; i < 12; i++)
1889 s->block_last_index[i] = -1;
1890 if (s->picture_structure == PICT_FRAME)
1891 s->mv_type = MV_TYPE_16X16;
1893 s->mv_type = MV_TYPE_FIELD;
1894 if (s->pict_type == AV_PICTURE_TYPE_P) {
1895 /* if P type, zero motion vector is implied */
1896 s->mv_dir = MV_DIR_FORWARD;
1897 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1898 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1899 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1900 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1902 /* if B type, reuse previous vectors and directions */
1903 s->mv[0][0][0] = s->last_mv[0][0][0];
1904 s->mv[0][0][1] = s->last_mv[0][0][1];
1905 s->mv[1][0][0] = s->last_mv[1][0][0];
1906 s->mv[1][0][1] = s->last_mv[1][0][1];
1911 eos: // end of slice
1912 *buf += (get_bits_count(&s->gb)-1)/8;
1913 av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1917 static int slice_decode_thread(AVCodecContext *c, void *arg)
1919 MpegEncContext *s = *(void**)arg;
1920 const uint8_t *buf = s->gb.buffer;
1921 int mb_y = s->start_mb_y;
1922 const int field_pic = s->picture_structure != PICT_FRAME;
1924 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1927 uint32_t start_code;
1930 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1932 av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1933 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1934 s->start_mb_y, s->end_mb_y, s->er.error_count);
1936 if (c->err_recognition & AV_EF_EXPLODE)
1938 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1939 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);
1941 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);
1944 if (s->mb_y == s->end_mb_y)
1948 buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code);
1949 mb_y= start_code - SLICE_MIN_START_CODE;
1950 if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1951 mb_y += (*buf&0xE0)<<2;
1953 if (s->picture_structure == PICT_BOTTOM_FIELD)
1955 if (mb_y < 0 || mb_y >= s->end_mb_y)
1961 * Handle slice ends.
1962 * @return 1 if it seems to be the last slice
1964 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1966 Mpeg1Context *s1 = avctx->priv_data;
1967 MpegEncContext *s = &s1->mpeg_enc_ctx;
1969 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1972 if (s->avctx->hwaccel) {
1973 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1974 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1977 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1978 ff_xvmc_field_end(s);
1980 /* end of slice reached */
1981 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1984 ff_er_frame_end(&s->er);
1986 ff_MPV_frame_end(s);
1988 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1989 int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
1992 ff_print_debug_info(s, s->current_picture_ptr, pict);
1994 if (avctx->active_thread_type & FF_THREAD_FRAME)
1995 s->picture_number++;
1996 /* latency of 1 frame for I- and P-frames */
1997 /* XXX: use another variable than picture_number */
1998 if (s->last_picture_ptr != NULL) {
1999 int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
2002 ff_print_debug_info(s, s->last_picture_ptr, pict);
2012 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2013 const uint8_t *buf, int buf_size)
2015 Mpeg1Context *s1 = avctx->priv_data;
2016 MpegEncContext *s = &s1->mpeg_enc_ctx;
2020 init_get_bits(&s->gb, buf, buf_size*8);
2022 width = get_bits(&s->gb, 12);
2023 height = get_bits(&s->gb, 12);
2024 s->aspect_ratio_info = get_bits(&s->gb, 4);
2025 if (s->aspect_ratio_info == 0) {
2026 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2027 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2030 s->frame_rate_index = get_bits(&s->gb, 4);
2031 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2033 s->bit_rate = get_bits(&s->gb, 18) * 400;
2034 if (get_bits1(&s->gb) == 0) /* marker */
2039 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2040 skip_bits(&s->gb, 1);
2043 if (get_bits1(&s->gb)) {
2044 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2046 for (i = 0; i < 64; i++) {
2047 j = s->dsp.idct_permutation[i];
2048 v = ff_mpeg1_default_intra_matrix[i];
2049 s->intra_matrix[j] = v;
2050 s->chroma_intra_matrix[j] = v;
2053 if (get_bits1(&s->gb)) {
2054 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2056 for (i = 0; i < 64; i++) {
2057 int j = s->dsp.idct_permutation[i];
2058 v = ff_mpeg1_default_non_intra_matrix[i];
2059 s->inter_matrix[j] = v;
2060 s->chroma_inter_matrix[j] = v;
2064 if (show_bits(&s->gb, 23) != 0) {
2065 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2069 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2070 s->progressive_sequence = 1;
2071 s->progressive_frame = 1;
2072 s->picture_structure = PICT_FRAME;
2074 s->frame_pred_frame_dct = 1;
2075 s->chroma_format = 1;
2076 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2077 s->out_format = FMT_MPEG1;
2078 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2079 if (s->flags & CODEC_FLAG_LOW_DELAY)
2082 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2083 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2084 s->avctx->rc_buffer_size, s->bit_rate);
2089 static int vcr2_init_sequence(AVCodecContext *avctx)
2091 Mpeg1Context *s1 = avctx->priv_data;
2092 MpegEncContext *s = &s1->mpeg_enc_ctx;
2095 /* start new MPEG-1 context decoding */
2096 s->out_format = FMT_MPEG1;
2097 if (s1->mpeg_enc_ctx_allocated) {
2098 ff_MPV_common_end(s);
2100 s->width = avctx->coded_width;
2101 s->height = avctx->coded_height;
2102 avctx->has_b_frames = 0; // true?
2105 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2106 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2108 if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel || uses_vdpau(avctx))
2109 if (avctx->idct_algo == FF_IDCT_AUTO)
2110 avctx->idct_algo = FF_IDCT_SIMPLE;
2112 if (ff_MPV_common_init(s) < 0)
2114 s1->mpeg_enc_ctx_allocated = 1;
2116 for (i = 0; i < 64; i++) {
2117 int j = s->dsp.idct_permutation[i];
2118 v = ff_mpeg1_default_intra_matrix[i];
2119 s->intra_matrix[j] = v;
2120 s->chroma_intra_matrix[j] = v;
2122 v = ff_mpeg1_default_non_intra_matrix[i];
2123 s->inter_matrix[j] = v;
2124 s->chroma_inter_matrix[j] = v;
2127 s->progressive_sequence = 1;
2128 s->progressive_frame = 1;
2129 s->picture_structure = PICT_FRAME;
2131 s->frame_pred_frame_dct = 1;
2132 s->chroma_format = 1;
2133 if (s->codec_tag == AV_RL32("BW10")) {
2134 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
2136 exchange_uv(s); // common init reset pblocks, so we swap them here
2137 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2138 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
2140 s1->save_width = s->width;
2141 s1->save_height = s->height;
2142 s1->save_progressive_seq = s->progressive_sequence;
2147 static void mpeg_decode_user_data(AVCodecContext *avctx,
2148 const uint8_t *p, int buf_size)
2150 Mpeg1Context *s = avctx->priv_data;
2151 const uint8_t *buf_end = p + buf_size;
2156 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2160 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2161 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2163 av_log(avctx, AV_LOG_ERROR, "\n");*/
2166 /* we parse the DTG active format information */
2167 if (buf_end - p >= 5 &&
2168 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2176 if (buf_end - p < 1)
2178 avctx->dtg_active_format = p[0] & 0x0f;
2183 static void mpeg_decode_gop(AVCodecContext *avctx,
2184 const uint8_t *buf, int buf_size)
2186 Mpeg1Context *s1 = avctx->priv_data;
2187 MpegEncContext *s = &s1->mpeg_enc_ctx;
2191 init_get_bits(&s->gb, buf, buf_size*8);
2193 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2195 s->closed_gop = get_bits1(&s->gb);
2196 /*broken_link indicate that after editing the
2197 reference frames of the first B-Frames after GOP I-Frame
2198 are missing (open gop)*/
2199 broken_link = get_bits1(&s->gb);
2201 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2202 char tcbuf[AV_TIMECODE_STR_SIZE];
2203 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2204 av_log(s->avctx, AV_LOG_DEBUG,
2205 "GOP (%s) closed_gop=%d broken_link=%d\n",
2206 tcbuf, s->closed_gop, broken_link);
2210 * Find the end of the current frame in the bitstream.
2211 * @return the position of the first byte of the next frame, or -1
2213 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2216 uint32_t state = pc->state;
2218 /* EOF considered as end of frame */
2223 0 frame start -> 1/4
2224 1 first_SEQEXT -> 0/2
2225 2 first field start -> 3/0
2226 3 second_SEQEXT -> 2/0
2230 for (i = 0; i < buf_size; i++) {
2231 av_assert1(pc->frame_start_found >= 0 && pc->frame_start_found <= 4);
2232 if (pc->frame_start_found & 1) {
2233 if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80)
2234 pc->frame_start_found--;
2235 else if (state == EXT_START_CODE + 2) {
2236 if ((buf[i] & 3) == 3)
2237 pc->frame_start_found = 0;
2239 pc->frame_start_found = (pc->frame_start_found + 1) & 3;
2243 i = avpriv_mpv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1;
2244 if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) {
2246 pc->frame_start_found = 4;
2248 if (state == SEQ_END_CODE) {
2249 pc->frame_start_found = 0;
2253 if (pc->frame_start_found == 2 && state == SEQ_START_CODE)
2254 pc->frame_start_found = 0;
2255 if (pc->frame_start_found < 4 && state == EXT_START_CODE)
2256 pc->frame_start_found++;
2257 if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) {
2258 if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) {
2259 pc->frame_start_found = 0;
2264 if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) {
2265 ff_fetch_timestamp(s, i - 3, 1);
2270 return END_NOT_FOUND;
2273 static int decode_chunks(AVCodecContext *avctx,
2274 AVFrame *picture, int *got_output,
2275 const uint8_t *buf, int buf_size)
2277 Mpeg1Context *s = avctx->priv_data;
2278 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2279 const uint8_t *buf_ptr = buf;
2280 const uint8_t *buf_end = buf + buf_size;
2281 int ret, input_size;
2283 int picture_start_code_seen = 0;
2286 /* find next start code */
2287 uint32_t start_code = -1;
2288 buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
2289 if (start_code > 0x1ff) {
2290 if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
2291 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2293 av_assert0(avctx->thread_count > 1);
2295 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2296 for (i = 0; i < s->slice_count; i++)
2297 s2->er.error_count += s2->thread_context[i]->er.error_count;
2300 if (CONFIG_VDPAU && uses_vdpau(avctx))
2301 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2303 ret = slice_end(avctx, picture);
2307 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2312 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2315 input_size = buf_end - buf_ptr;
2317 if (avctx->debug & FF_DEBUG_STARTCODE) {
2318 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2321 /* prepare data for next start code */
2322 switch (start_code) {
2323 case SEQ_START_CODE:
2324 if (last_code == 0) {
2325 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2326 if(buf != avctx->extradata)
2329 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2330 if (avctx->err_recognition & AV_EF_EXPLODE)
2331 return AVERROR_INVALIDDATA;
2335 case PICTURE_START_CODE:
2336 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2337 /* If it's a frame picture, there can't be more than one picture header.
2338 Yet, it does happen and we need to handle it. */
2339 av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2342 picture_start_code_seen = 1;
2344 if (s2->width <= 0 || s2->height <= 0) {
2345 av_log(avctx, AV_LOG_ERROR, "%dx%d is invalid\n", s2->width, s2->height);
2346 return AVERROR_INVALIDDATA;
2350 s2->intra_dc_precision= 3;
2351 s2->intra_matrix[0]= 1;
2353 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
2356 avctx->execute(avctx, slice_decode_thread,
2357 s2->thread_context, NULL,
2358 s->slice_count, sizeof(void*));
2359 for (i = 0; i < s->slice_count; i++)
2360 s2->er.error_count += s2->thread_context[i]->er.error_count;
2363 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2364 ret = mpeg_decode_postinit(avctx);
2366 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2370 /* we have a complete image: we try to decompress it */
2371 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2373 s2->first_slice = 1;
2374 last_code = PICTURE_START_CODE;
2376 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2377 if (avctx->err_recognition & AV_EF_EXPLODE)
2378 return AVERROR_INVALIDDATA;
2381 case EXT_START_CODE:
2382 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2384 switch (get_bits(&s2->gb, 4)) {
2386 if (last_code == 0) {
2387 mpeg_decode_sequence_extension(s);
2389 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2390 if (avctx->err_recognition & AV_EF_EXPLODE)
2391 return AVERROR_INVALIDDATA;
2395 mpeg_decode_sequence_display_extension(s);
2398 mpeg_decode_quant_matrix_extension(s2);
2401 mpeg_decode_picture_display_extension(s);
2404 if (last_code == PICTURE_START_CODE) {
2405 mpeg_decode_picture_coding_extension(s);
2407 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2408 if (avctx->err_recognition & AV_EF_EXPLODE)
2409 return AVERROR_INVALIDDATA;
2414 case USER_START_CODE:
2415 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2417 case GOP_START_CODE:
2418 if (last_code == 0) {
2420 mpeg_decode_gop(avctx, buf_ptr, input_size);
2423 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2424 if (avctx->err_recognition & AV_EF_EXPLODE)
2425 return AVERROR_INVALIDDATA;
2429 if (start_code >= SLICE_MIN_START_CODE &&
2430 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2432 if (s2->progressive_sequence && !s2->progressive_frame) {
2433 s2->progressive_frame = 1;
2434 av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
2437 if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2438 av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure);
2439 s2->picture_structure = PICT_FRAME;
2442 if (s2->progressive_sequence && !s2->frame_pred_frame_dct) {
2443 av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2446 if (s2->picture_structure == PICT_FRAME) {
2447 s2->first_field = 0;
2448 s2->v_edge_pos = 16 * s2->mb_height;
2450 s2->first_field ^= 1;
2451 s2->v_edge_pos = 8 * s2->mb_height;
2452 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2455 if (start_code >= SLICE_MIN_START_CODE &&
2456 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2457 const int field_pic = s2->picture_structure != PICT_FRAME;
2458 int mb_y = start_code - SLICE_MIN_START_CODE;
2459 last_code = SLICE_MIN_START_CODE;
2460 if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2461 mb_y += (*buf_ptr&0xE0)<<2;
2464 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2467 if (mb_y >= s2->mb_height) {
2468 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2472 if (s2->last_picture_ptr == NULL) {
2473 /* Skip B-frames if we do not have reference frames and gop is not closed */
2474 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2475 if (!s2->closed_gop)
2479 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2481 if (s2->next_picture_ptr == NULL) {
2482 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2483 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break;
2485 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2486 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2487 avctx->skip_frame >= AVDISCARD_ALL)
2490 if (!s->mpeg_enc_ctx_allocated)
2493 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2494 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2498 if (!s2->pict_type) {
2499 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2500 if (avctx->err_recognition & AV_EF_EXPLODE)
2501 return AVERROR_INVALIDDATA;
2505 if (s2->first_slice) {
2506 s2->first_slice = 0;
2507 if (mpeg_field_start(s2, buf, buf_size) < 0)
2510 if (!s2->current_picture_ptr) {
2511 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2512 return AVERROR_INVALIDDATA;
2515 if (uses_vdpau(avctx)) {
2520 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2521 int threshold = (s2->mb_height * s->slice_count +
2522 s2->slice_context_count / 2) /
2523 s2->slice_context_count;
2524 av_assert0(avctx->thread_count > 1);
2525 if (threshold <= mb_y) {
2526 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2528 thread_context->start_mb_y = mb_y;
2529 thread_context->end_mb_y = s2->mb_height;
2530 if (s->slice_count) {
2531 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2532 ret = ff_update_duplicate_context(thread_context,
2537 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2540 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2542 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2546 if (avctx->err_recognition & AV_EF_EXPLODE)
2548 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2549 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);
2551 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);
2560 static int mpeg_decode_frame(AVCodecContext *avctx,
2561 void *data, int *got_output,
2564 const uint8_t *buf = avpkt->data;
2566 int buf_size = avpkt->size;
2567 Mpeg1Context *s = avctx->priv_data;
2568 AVFrame *picture = data;
2569 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2570 av_dlog(avctx, "fill_buffer\n");
2572 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2573 /* special case for last picture */
2574 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2575 int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
2579 s2->next_picture_ptr = NULL;
2586 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2587 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2589 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2593 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2594 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2595 || s2->codec_tag == AV_RL32("BW10")
2597 vcr2_init_sequence(avctx);
2601 if (avctx->extradata && !s->extradata_decoded) {
2602 ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size);
2604 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2607 s->extradata_decoded = 1;
2608 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2609 s2->current_picture_ptr = NULL;
2614 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2615 if (ret<0 || *got_output)
2616 s2->current_picture_ptr = NULL;
2622 static void flush(AVCodecContext *avctx)
2624 Mpeg1Context *s = avctx->priv_data;
2628 ff_mpeg_flush(avctx);
2631 static int mpeg_decode_end(AVCodecContext *avctx)
2633 Mpeg1Context *s = avctx->priv_data;
2635 if (s->mpeg_enc_ctx_allocated)
2636 ff_MPV_common_end(&s->mpeg_enc_ctx);
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 .type = AVMEDIA_TYPE_VIDEO,
2656 .id = AV_CODEC_ID_MPEG1VIDEO,
2657 .priv_data_size = sizeof(Mpeg1Context),
2658 .init = mpeg_decode_init,
2659 .close = mpeg_decode_end,
2660 .decode = mpeg_decode_frame,
2661 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2662 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2663 CODEC_CAP_SLICE_THREADS,
2666 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2667 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2670 AVCodec ff_mpeg2video_decoder = {
2671 .name = "mpeg2video",
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_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2679 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2680 CODEC_CAP_SLICE_THREADS,
2683 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2684 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2688 AVCodec ff_mpegvideo_decoder = {
2689 .name = "mpegvideo",
2690 .type = AVMEDIA_TYPE_VIDEO,
2691 .id = AV_CODEC_ID_MPEG2VIDEO,
2692 .priv_data_size = sizeof(Mpeg1Context),
2693 .init = mpeg_decode_init,
2694 .close = mpeg_decode_end,
2695 .decode = mpeg_decode_frame,
2696 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2699 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2702 #if CONFIG_MPEG_XVMC_DECODER
2703 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2705 if (avctx->active_thread_type & FF_THREAD_SLICE)
2707 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2709 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2710 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2712 mpeg_decode_init(avctx);
2714 avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT;
2715 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2720 AVCodec ff_mpeg_xvmc_decoder = {
2721 .name = "mpegvideo_xvmc",
2722 .type = AVMEDIA_TYPE_VIDEO,
2723 .id = AV_CODEC_ID_MPEG2VIDEO_XVMC,
2724 .priv_data_size = sizeof(Mpeg1Context),
2725 .init = mpeg_mc_decode_init,
2726 .close = mpeg_decode_end,
2727 .decode = mpeg_decode_frame,
2728 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2729 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2731 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2736 #if CONFIG_MPEG_VDPAU_DECODER
2737 AVCodec ff_mpeg_vdpau_decoder = {
2738 .name = "mpegvideo_vdpau",
2739 .type = AVMEDIA_TYPE_VIDEO,
2740 .id = AV_CODEC_ID_MPEG2VIDEO,
2741 .priv_data_size = sizeof(Mpeg1Context),
2742 .init = mpeg_decode_init,
2743 .close = mpeg_decode_end,
2744 .decode = mpeg_decode_frame,
2745 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2746 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2748 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2752 #if CONFIG_MPEG1_VDPAU_DECODER
2753 AVCodec ff_mpeg1_vdpau_decoder = {
2754 .name = "mpeg1video_vdpau",
2755 .type = AVMEDIA_TYPE_VIDEO,
2756 .id = AV_CODEC_ID_MPEG1VIDEO,
2757 .priv_data_size = sizeof(Mpeg1Context),
2758 .init = mpeg_decode_init,
2759 .close = mpeg_decode_end,
2760 .decode = mpeg_decode_frame,
2761 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2762 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2764 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),