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
34 #include "mpegvideo.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/timecode.h"
39 #include "mpeg12data.h"
40 #include "mpeg12decdata.h"
41 #include "bytestream.h"
42 #include "vdpau_internal.h"
43 #include "xvmc_internal.h"
51 #define MBINCR_VLC_BITS 9
52 #define MB_PAT_VLC_BITS 9
53 #define MB_PTYPE_VLC_BITS 6
54 #define MB_BTYPE_VLC_BITS 6
58 /* as H.263, but only 17 codes */
59 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
61 int code, sign, val, shift;
63 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
71 sign = get_bits1(&s->gb);
75 val = (val - 1) << shift;
76 val |= get_bits(&s->gb, shift);
84 return sign_extend(val, 5 + shift);
87 static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
89 int level, dc, diff, i, j, run;
91 RLTable *rl = &ff_rl_mpeg1;
92 uint8_t * const scantable = s->intra_scantable.permutated;
93 const uint16_t *quant_matrix = s->intra_matrix;
94 const int qscale = s->qscale;
97 component = (n <= 3 ? 0 : n - 4 + 1);
98 diff = decode_dc(&s->gb, component);
101 dc = s->last_dc[component];
103 s->last_dc[component] = dc;
104 block[0] = dc * quant_matrix[0];
105 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
108 OPEN_READER(re, &s->gb);
109 /* now quantify & encode AC coefficients */
111 UPDATE_CACHE(re, &s->gb);
112 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
116 } else if (level != 0) {
119 level = (level * qscale * quant_matrix[j]) >> 4;
120 level = (level - 1) | 1;
121 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
122 LAST_SKIP_BITS(re, &s->gb, 1);
125 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
126 UPDATE_CACHE(re, &s->gb);
127 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
129 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
130 } else if (level == 0) {
131 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
137 level = (level * qscale * quant_matrix[j]) >> 4;
138 level = (level - 1) | 1;
141 level = (level * qscale * quant_matrix[j]) >> 4;
142 level = (level - 1) | 1;
146 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
152 CLOSE_READER(re, &s->gb);
154 s->block_last_index[n] = i;
158 int ff_mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
160 return mpeg1_decode_block_intra(s, block, n);
163 static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
165 int level, i, j, run;
166 RLTable *rl = &ff_rl_mpeg1;
167 uint8_t * const scantable = s->intra_scantable.permutated;
168 const uint16_t *quant_matrix = s->inter_matrix;
169 const int qscale = s->qscale;
172 OPEN_READER(re, &s->gb);
174 // special case for first coefficient, no need to add second VLC table
175 UPDATE_CACHE(re, &s->gb);
176 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
177 level = (3 * qscale * quant_matrix[0]) >> 5;
178 level = (level - 1) | 1;
179 if (GET_CACHE(re, &s->gb) & 0x40000000)
183 SKIP_BITS(re, &s->gb, 2);
184 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
187 /* now quantify & encode AC coefficients */
189 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
194 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
195 level = (level - 1) | 1;
196 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
197 SKIP_BITS(re, &s->gb, 1);
200 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
201 UPDATE_CACHE(re, &s->gb);
202 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
204 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
205 } else if (level == 0) {
206 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
212 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
213 level = (level - 1) | 1;
216 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
217 level = (level - 1) | 1;
221 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
226 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
228 UPDATE_CACHE(re, &s->gb);
231 LAST_SKIP_BITS(re, &s->gb, 2);
232 CLOSE_READER(re, &s->gb);
234 s->block_last_index[n] = i;
238 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
240 int level, i, j, run;
241 RLTable *rl = &ff_rl_mpeg1;
242 uint8_t * const scantable = s->intra_scantable.permutated;
243 const int qscale = s->qscale;
246 OPEN_READER(re, &s->gb);
248 // special case for first coefficient, no need to add second VLC table
249 UPDATE_CACHE(re, &s->gb);
250 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
251 level = (3 * qscale) >> 1;
252 level = (level - 1) | 1;
253 if (GET_CACHE(re, &s->gb) & 0x40000000)
257 SKIP_BITS(re, &s->gb, 2);
258 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
262 /* now quantify & encode AC coefficients */
264 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
269 level = ((level * 2 + 1) * qscale) >> 1;
270 level = (level - 1) | 1;
271 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
272 SKIP_BITS(re, &s->gb, 1);
275 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
276 UPDATE_CACHE(re, &s->gb);
277 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
279 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
280 } else if (level == 0) {
281 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
287 level = ((level * 2 + 1) * qscale) >> 1;
288 level = (level - 1) | 1;
291 level = ((level * 2 + 1) * qscale) >> 1;
292 level = (level - 1) | 1;
297 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
299 UPDATE_CACHE(re, &s->gb);
302 LAST_SKIP_BITS(re, &s->gb, 2);
303 CLOSE_READER(re, &s->gb);
305 s->block_last_index[n] = i;
310 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n)
312 int level, i, j, run;
313 RLTable *rl = &ff_rl_mpeg1;
314 uint8_t * const scantable = s->intra_scantable.permutated;
315 const uint16_t *quant_matrix;
316 const int qscale = s->qscale;
322 OPEN_READER(re, &s->gb);
325 quant_matrix = s->inter_matrix;
327 quant_matrix = s->chroma_inter_matrix;
329 // special case for first coefficient, no need to add second VLC table
330 UPDATE_CACHE(re, &s->gb);
331 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
332 level= (3 * qscale * quant_matrix[0]) >> 5;
333 if (GET_CACHE(re, &s->gb) & 0x40000000)
338 SKIP_BITS(re, &s->gb, 2);
339 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
343 /* now quantify & encode AC coefficients */
345 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
350 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
351 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
352 SKIP_BITS(re, &s->gb, 1);
355 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
356 UPDATE_CACHE(re, &s->gb);
357 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
362 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
365 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
369 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
375 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
377 UPDATE_CACHE(re, &s->gb);
380 LAST_SKIP_BITS(re, &s->gb, 2);
381 CLOSE_READER(re, &s->gb);
383 block[63] ^= (mismatch & 1);
385 s->block_last_index[n] = i;
389 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
390 DCTELEM *block, int n)
392 int level, i, j, run;
393 RLTable *rl = &ff_rl_mpeg1;
394 uint8_t * const scantable = s->intra_scantable.permutated;
395 const int qscale = s->qscale;
396 OPEN_READER(re, &s->gb);
399 // special case for first coefficient, no need to add second VLC table
400 UPDATE_CACHE(re, &s->gb);
401 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
402 level = (3 * qscale) >> 1;
403 if (GET_CACHE(re, &s->gb) & 0x40000000)
407 SKIP_BITS(re, &s->gb, 2);
408 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
412 /* now quantify & encode AC coefficients */
414 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
419 level = ((level * 2 + 1) * qscale) >> 1;
420 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
421 SKIP_BITS(re, &s->gb, 1);
424 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
425 UPDATE_CACHE(re, &s->gb);
426 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
431 level = ((-level * 2 + 1) * qscale) >> 1;
434 level = ((level * 2 + 1) * qscale) >> 1;
439 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
441 UPDATE_CACHE(re, &s->gb);
444 LAST_SKIP_BITS(re, &s->gb, 2);
445 CLOSE_READER(re, &s->gb);
446 s->block_last_index[n] = i;
451 static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
453 int level, dc, diff, i, j, run;
456 uint8_t * const scantable = s->intra_scantable.permutated;
457 const uint16_t *quant_matrix;
458 const int qscale = s->qscale;
463 quant_matrix = s->intra_matrix;
466 quant_matrix = s->chroma_intra_matrix;
467 component = (n & 1) + 1;
469 diff = decode_dc(&s->gb, component);
472 dc = s->last_dc[component];
474 s->last_dc[component] = dc;
475 block[0] = dc << (3 - s->intra_dc_precision);
476 av_dlog(s->avctx, "dc=%d\n", block[0]);
477 mismatch = block[0] ^ 1;
479 if (s->intra_vlc_format)
485 OPEN_READER(re, &s->gb);
486 /* now quantify & encode AC coefficients */
488 UPDATE_CACHE(re, &s->gb);
489 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
493 } else if (level != 0) {
496 level = (level * qscale * quant_matrix[j]) >> 4;
497 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
498 LAST_SKIP_BITS(re, &s->gb, 1);
501 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
502 UPDATE_CACHE(re, &s->gb);
503 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
507 level = (-level * qscale * quant_matrix[j]) >> 4;
510 level = (level * qscale * quant_matrix[j]) >> 4;
514 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
521 CLOSE_READER(re, &s->gb);
523 block[63] ^= mismatch & 1;
525 s->block_last_index[n] = i;
529 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
531 int level, dc, diff, j, run;
534 uint8_t * scantable = s->intra_scantable.permutated;
535 const uint16_t *quant_matrix;
536 const int qscale = s->qscale;
540 quant_matrix = s->intra_matrix;
543 quant_matrix = s->chroma_intra_matrix;
544 component = (n & 1) + 1;
546 diff = decode_dc(&s->gb, component);
549 dc = s->last_dc[component];
551 s->last_dc[component] = dc;
552 block[0] = dc << (3 - s->intra_dc_precision);
553 if (s->intra_vlc_format)
559 OPEN_READER(re, &s->gb);
560 /* now quantify & encode AC coefficients */
562 UPDATE_CACHE(re, &s->gb);
563 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
567 } else if (level != 0) {
570 level = (level * qscale * quant_matrix[j]) >> 4;
571 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
572 LAST_SKIP_BITS(re, &s->gb, 1);
575 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
576 UPDATE_CACHE(re, &s->gb);
577 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
581 level = (-level * qscale * quant_matrix[j]) >> 4;
584 level = (level * qscale * quant_matrix[j]) >> 4;
590 CLOSE_READER(re, &s->gb);
593 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
597 uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
599 #define INIT_2D_VLC_RL(rl, static_size)\
601 static RL_VLC_ELEM rl_vlc_table[static_size];\
602 INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
603 &rl.table_vlc[0][1], 4, 2,\
604 &rl.table_vlc[0][0], 4, 2, static_size);\
606 rl.rl_vlc[0] = rl_vlc_table;\
607 init_2d_vlc_rl(&rl);\
610 static void init_2d_vlc_rl(RLTable *rl)
614 for (i = 0; i < rl->vlc.table_size; i++) {
615 int code = rl->vlc.table[i][0];
616 int len = rl->vlc.table[i][1];
619 if (len == 0) { // illegal code
622 } else if (len<0) { //more bits needed
626 if (code == rl->n) { //esc
629 } else if (code == rl->n+1) { //eob
633 run = rl->table_run [code] + 1;
634 level = rl->table_level[code];
637 rl->rl_vlc[0][i].len = len;
638 rl->rl_vlc[0][i].level = level;
639 rl->rl_vlc[0][i].run = run;
643 void ff_mpeg12_common_init(MpegEncContext *s)
646 s->y_dc_scale_table =
647 s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
651 void ff_mpeg1_clean_buffers(MpegEncContext *s)
653 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
654 s->last_dc[1] = s->last_dc[0];
655 s->last_dc[2] = s->last_dc[0];
656 memset(s->last_mv, 0, sizeof(s->last_mv));
660 /******************************************/
664 VLC ff_dc_chroma_vlc;
666 static VLC mbincr_vlc;
667 static VLC mb_ptype_vlc;
668 static VLC mb_btype_vlc;
669 static VLC mb_pat_vlc;
671 av_cold void ff_mpeg12_init_vlcs(void)
678 INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
679 ff_mpeg12_vlc_dc_lum_bits, 1, 1,
680 ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
681 INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
682 ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
683 ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
684 INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
685 &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
686 &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
687 INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
688 &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
689 &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
690 INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
691 &ff_mpeg12_mbPatTable[0][1], 2, 1,
692 &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
694 INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
695 &table_mb_ptype[0][1], 2, 1,
696 &table_mb_ptype[0][0], 2, 1, 64);
697 INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
698 &table_mb_btype[0][1], 2, 1,
699 &table_mb_btype[0][0], 2, 1, 64);
700 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
701 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
703 INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
704 INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
708 static inline int get_dmv(MpegEncContext *s)
710 if (get_bits1(&s->gb))
711 return 1 - (get_bits1(&s->gb) << 1);
716 static inline int get_qscale(MpegEncContext *s)
718 int qscale = get_bits(&s->gb, 5);
719 if (s->q_scale_type) {
720 return non_linear_qscale[qscale];
726 static void exchange_uv(MpegEncContext *s)
731 s->pblocks[4] = s->pblocks[5];
735 /* motion type (for MPEG-2) */
741 static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
743 int i, j, k, cbp, val, mb_type, motion_type;
744 const int mb_block_count = 4 + (1 << s->chroma_format);
746 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
748 assert(s->mb_skipped == 0);
750 if (s->mb_skip_run-- != 0) {
751 if (s->pict_type == AV_PICTURE_TYPE_P) {
753 s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
758 mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
760 mb_type = s->current_picture.f.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
761 if (IS_INTRA(mb_type))
763 s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
764 mb_type | MB_TYPE_SKIP;
765 // assert(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
767 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
774 switch (s->pict_type) {
776 case AV_PICTURE_TYPE_I:
777 if (get_bits1(&s->gb) == 0) {
778 if (get_bits1(&s->gb) == 0) {
779 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
782 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
784 mb_type = MB_TYPE_INTRA;
787 case AV_PICTURE_TYPE_P:
788 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
790 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
793 mb_type = ptype2mb_type[mb_type];
795 case AV_PICTURE_TYPE_B:
796 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
798 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
801 mb_type = btype2mb_type[mb_type];
804 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
805 // motion_type = 0; /* avoid warning */
806 if (IS_INTRA(mb_type)) {
807 s->dsp.clear_blocks(s->block[0]);
809 if (!s->chroma_y_shift) {
810 s->dsp.clear_blocks(s->block[6]);
813 /* compute DCT type */
814 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
815 !s->frame_pred_frame_dct) {
816 s->interlaced_dct = get_bits1(&s->gb);
819 if (IS_QUANT(mb_type))
820 s->qscale = get_qscale(s);
822 if (s->concealment_motion_vectors) {
823 /* just parse them */
824 if (s->picture_structure != PICT_FRAME)
825 skip_bits1(&s->gb); /* field select */
827 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
828 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
829 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
830 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
832 skip_bits1(&s->gb); /* marker */
834 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
836 // if 1, we memcpy blocks in xvmcvideo
837 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
838 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
844 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
845 if (s->flags2 & CODEC_FLAG2_FAST) {
846 for (i = 0; i < 6; i++) {
847 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
850 for (i = 0; i < mb_block_count; i++) {
851 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
856 for (i = 0; i < 6; i++) {
857 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
862 if (mb_type & MB_TYPE_ZERO_MV) {
863 assert(mb_type & MB_TYPE_CBP);
865 s->mv_dir = MV_DIR_FORWARD;
866 if (s->picture_structure == PICT_FRAME) {
867 if (!s->frame_pred_frame_dct)
868 s->interlaced_dct = get_bits1(&s->gb);
869 s->mv_type = MV_TYPE_16X16;
871 s->mv_type = MV_TYPE_FIELD;
872 mb_type |= MB_TYPE_INTERLACED;
873 s->field_select[0][0] = s->picture_structure - 1;
876 if (IS_QUANT(mb_type))
877 s->qscale = get_qscale(s);
879 s->last_mv[0][0][0] = 0;
880 s->last_mv[0][0][1] = 0;
881 s->last_mv[0][1][0] = 0;
882 s->last_mv[0][1][1] = 0;
886 assert(mb_type & MB_TYPE_L0L1);
887 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
888 /* get additional motion vector type */
889 if (s->frame_pred_frame_dct)
890 motion_type = MT_FRAME;
892 motion_type = get_bits(&s->gb, 2);
893 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
894 s->interlaced_dct = get_bits1(&s->gb);
897 if (IS_QUANT(mb_type))
898 s->qscale = get_qscale(s);
901 s->mv_dir = (mb_type >> 13) & 3;
902 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
903 switch (motion_type) {
904 case MT_FRAME: /* or MT_16X8 */
905 if (s->picture_structure == PICT_FRAME) {
906 mb_type |= MB_TYPE_16x16;
907 s->mv_type = MV_TYPE_16X16;
908 for (i = 0; i < 2; i++) {
909 if (USES_LIST(mb_type, i)) {
911 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
912 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
913 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
914 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
915 /* full_pel: only for MPEG-1 */
916 if (s->full_pel[i]) {
917 s->mv[i][0][0] <<= 1;
918 s->mv[i][0][1] <<= 1;
923 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
924 s->mv_type = MV_TYPE_16X8;
925 for (i = 0; i < 2; i++) {
926 if (USES_LIST(mb_type, i)) {
928 for (j = 0; j < 2; j++) {
929 s->field_select[i][j] = get_bits1(&s->gb);
930 for (k = 0; k < 2; k++) {
931 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
932 s->last_mv[i][j][k]);
933 s->last_mv[i][j][k] = val;
934 s->mv[i][j][k] = val;
942 s->mv_type = MV_TYPE_FIELD;
943 if (s->picture_structure == PICT_FRAME) {
944 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
945 for (i = 0; i < 2; i++) {
946 if (USES_LIST(mb_type, i)) {
947 for (j = 0; j < 2; j++) {
948 s->field_select[i][j] = get_bits1(&s->gb);
949 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
950 s->last_mv[i][j][0]);
951 s->last_mv[i][j][0] = val;
952 s->mv[i][j][0] = val;
953 av_dlog(s->avctx, "fmx=%d\n", val);
954 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
955 s->last_mv[i][j][1] >> 1);
956 s->last_mv[i][j][1] = val << 1;
957 s->mv[i][j][1] = val;
958 av_dlog(s->avctx, "fmy=%d\n", val);
963 av_assert0(!s->progressive_sequence);
964 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
965 for (i = 0; i < 2; i++) {
966 if (USES_LIST(mb_type, i)) {
967 s->field_select[i][0] = get_bits1(&s->gb);
968 for (k = 0; k < 2; k++) {
969 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
970 s->last_mv[i][0][k]);
971 s->last_mv[i][0][k] = val;
972 s->last_mv[i][1][k] = val;
973 s->mv[i][0][k] = val;
980 if(s->progressive_sequence){
981 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
984 s->mv_type = MV_TYPE_DMV;
985 for (i = 0; i < 2; i++) {
986 if (USES_LIST(mb_type, i)) {
987 int dmx, dmy, mx, my, m;
988 const int my_shift = s->picture_structure == PICT_FRAME;
990 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
991 s->last_mv[i][0][0]);
992 s->last_mv[i][0][0] = mx;
993 s->last_mv[i][1][0] = mx;
995 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
996 s->last_mv[i][0][1] >> my_shift);
1000 s->last_mv[i][0][1] = my << my_shift;
1001 s->last_mv[i][1][1] = my << my_shift;
1003 s->mv[i][0][0] = mx;
1004 s->mv[i][0][1] = my;
1005 s->mv[i][1][0] = mx; // not used
1006 s->mv[i][1][1] = my; // not used
1008 if (s->picture_structure == PICT_FRAME) {
1009 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1011 // m = 1 + 2 * s->top_field_first;
1012 m = s->top_field_first ? 1 : 3;
1014 /* top -> top pred */
1015 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1016 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1018 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1019 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1021 mb_type |= MB_TYPE_16x16;
1023 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1024 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1025 if (s->picture_structure == PICT_TOP_FIELD)
1034 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1040 if (HAS_CBP(mb_type)) {
1041 s->dsp.clear_blocks(s->block[0]);
1043 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1044 if (mb_block_count > 6) {
1045 cbp <<= mb_block_count - 6;
1046 cbp |= get_bits(&s->gb, mb_block_count - 6);
1047 s->dsp.clear_blocks(s->block[6]);
1050 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1054 //if 1, we memcpy blocks in xvmcvideo
1055 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1056 ff_xvmc_pack_pblocks(s, cbp);
1062 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1063 if (s->flags2 & CODEC_FLAG2_FAST) {
1064 for (i = 0; i < 6; i++) {
1066 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1068 s->block_last_index[i] = -1;
1073 cbp <<= 12-mb_block_count;
1075 for (i = 0; i < mb_block_count; i++) {
1076 if (cbp & (1 << 11)) {
1077 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1080 s->block_last_index[i] = -1;
1086 if (s->flags2 & CODEC_FLAG2_FAST) {
1087 for (i = 0; i < 6; i++) {
1089 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1091 s->block_last_index[i] = -1;
1096 for (i = 0; i < 6; i++) {
1098 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1101 s->block_last_index[i] = -1;
1108 for (i = 0; i < 12; i++)
1109 s->block_last_index[i] = -1;
1113 s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1118 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1120 Mpeg1Context *s = avctx->priv_data;
1121 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1124 /* we need some permutation to store matrices,
1125 * until MPV_common_init() sets the real permutation. */
1126 for (i = 0; i < 64; i++)
1127 s2->dsp.idct_permutation[i]=i;
1129 ff_MPV_decode_defaults(s2);
1131 s->mpeg_enc_ctx.avctx = avctx;
1132 s->mpeg_enc_ctx.flags = avctx->flags;
1133 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1134 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1135 ff_mpeg12_init_vlcs();
1137 s->mpeg_enc_ctx_allocated = 0;
1138 s->mpeg_enc_ctx.picture_number = 0;
1139 s->repeat_field = 0;
1140 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1141 avctx->color_range = AVCOL_RANGE_MPEG;
1142 if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
1143 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1145 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1149 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1151 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1152 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1155 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1158 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1159 if (err) return err;
1161 if (!ctx->mpeg_enc_ctx_allocated)
1162 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1164 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1165 s->picture_number++;
1170 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1171 const uint8_t *new_perm)
1173 uint16_t temp_matrix[64];
1176 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1178 for (i = 0; i < 64; i++) {
1179 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1183 static const enum PixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1184 #if CONFIG_MPEG_XVMC_DECODER
1185 PIX_FMT_XVMC_MPEG2_IDCT,
1186 PIX_FMT_XVMC_MPEG2_MC,
1188 #if CONFIG_MPEG1_VDPAU_HWACCEL
1189 PIX_FMT_VDPAU_MPEG1,
1195 static const enum PixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1196 #if CONFIG_MPEG_XVMC_DECODER
1197 PIX_FMT_XVMC_MPEG2_IDCT,
1198 PIX_FMT_XVMC_MPEG2_MC,
1200 #if CONFIG_MPEG2_VDPAU_HWACCEL
1201 PIX_FMT_VDPAU_MPEG2,
1203 #if CONFIG_MPEG2_DXVA2_HWACCEL
1206 #if CONFIG_MPEG2_VAAPI_HWACCEL
1213 static inline int uses_vdpau(AVCodecContext *avctx) {
1214 return avctx->pix_fmt == PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == PIX_FMT_VDPAU_MPEG2;
1217 static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1219 Mpeg1Context *s1 = avctx->priv_data;
1220 MpegEncContext *s = &s1->mpeg_enc_ctx;
1222 if(s->chroma_format < 2) {
1223 enum PixelFormat res;
1224 res = avctx->get_format(avctx,
1225 avctx->codec_id == CODEC_ID_MPEG1VIDEO ?
1226 mpeg1_hwaccel_pixfmt_list_420 :
1227 mpeg2_hwaccel_pixfmt_list_420);
1228 if (res != PIX_FMT_XVMC_MPEG2_IDCT && res != PIX_FMT_XVMC_MPEG2_MC) {
1229 avctx->xvmc_acceleration = 0;
1230 } else if (!avctx->xvmc_acceleration) {
1231 avctx->xvmc_acceleration = 2;
1234 } else if(s->chroma_format == 2)
1235 return PIX_FMT_YUV422P;
1237 return PIX_FMT_YUV444P;
1240 /* Call this function when we know all parameters.
1241 * It may be called in different places for MPEG-1 and MPEG-2. */
1242 static int mpeg_decode_postinit(AVCodecContext *avctx)
1244 Mpeg1Context *s1 = avctx->priv_data;
1245 MpegEncContext *s = &s1->mpeg_enc_ctx;
1246 uint8_t old_permutation[64];
1248 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1249 avctx->coded_width != s->width ||
1250 avctx->coded_height != s->height ||
1251 s1->save_width != s->width ||
1252 s1->save_height != s->height ||
1253 s1->save_aspect_info != s->aspect_ratio_info ||
1254 s1->save_progressive_seq != s->progressive_sequence ||
1258 if (s1->mpeg_enc_ctx_allocated) {
1259 ParseContext pc = s->parse_context;
1260 s->parse_context.buffer = 0;
1261 ff_MPV_common_end(s);
1262 s->parse_context = pc;
1265 if ((s->width == 0) || (s->height == 0))
1268 avcodec_set_dimensions(avctx, s->width, s->height);
1269 avctx->bit_rate = s->bit_rate;
1270 s1->save_aspect_info = s->aspect_ratio_info;
1271 s1->save_width = s->width;
1272 s1->save_height = s->height;
1273 s1->save_progressive_seq = s->progressive_sequence;
1275 /* low_delay may be forced, in this case we will have B-frames
1276 * that behave like P-frames. */
1277 avctx->has_b_frames = !s->low_delay;
1279 if (avctx->codec_id == CODEC_ID_MPEG1VIDEO) {
1281 avctx->time_base.den = avpriv_frame_rate_tab[s->frame_rate_index].num;
1282 avctx->time_base.num = avpriv_frame_rate_tab[s->frame_rate_index].den;
1284 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1285 avctx->ticks_per_frame=1;
1288 av_reduce(&s->avctx->time_base.den,
1289 &s->avctx->time_base.num,
1290 avpriv_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1291 avpriv_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1293 avctx->ticks_per_frame = 2;
1295 if (s->aspect_ratio_info > 1) {
1297 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1298 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1299 (AVRational) {s->width, s->height});
1301 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1302 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1303 // issue1613, 621, 562
1304 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1305 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1306 s->avctx->sample_aspect_ratio =
1307 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1308 (AVRational) {s->width, s->height});
1310 s->avctx->sample_aspect_ratio =
1311 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1312 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1313 //issue1613 4/3 16/9 -> 16/9
1314 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1315 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1316 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1317 //av_log(NULL, AV_LOG_ERROR, "A %d/%d\n", ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1318 //av_log(NULL, AV_LOG_ERROR, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den);
1321 s->avctx->sample_aspect_ratio =
1322 ff_mpeg2_aspect[s->aspect_ratio_info];
1326 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1327 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1328 // until then pix_fmt may be changed right after codec init
1329 if (avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
1331 if (avctx->idct_algo == FF_IDCT_AUTO)
1332 avctx->idct_algo = FF_IDCT_SIMPLE;
1334 /* Quantization matrices may need reordering
1335 * if DCT permutation is changed. */
1336 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1338 if (ff_MPV_common_init(s) < 0)
1341 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1342 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1343 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1344 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1346 s1->mpeg_enc_ctx_allocated = 1;
1351 static int mpeg1_decode_picture(AVCodecContext *avctx,
1352 const uint8_t *buf, int buf_size)
1354 Mpeg1Context *s1 = avctx->priv_data;
1355 MpegEncContext *s = &s1->mpeg_enc_ctx;
1356 int ref, f_code, vbv_delay;
1358 init_get_bits(&s->gb, buf, buf_size*8);
1360 ref = get_bits(&s->gb, 10); /* temporal ref */
1361 s->pict_type = get_bits(&s->gb, 3);
1362 if (s->pict_type == 0 || s->pict_type > 3)
1365 vbv_delay = get_bits(&s->gb, 16);
1366 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1367 s->full_pel[0] = get_bits1(&s->gb);
1368 f_code = get_bits(&s->gb, 3);
1369 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1372 s->mpeg_f_code[0][0] = f_code;
1373 s->mpeg_f_code[0][1] = f_code;
1375 if (s->pict_type == AV_PICTURE_TYPE_B) {
1376 s->full_pel[1] = get_bits1(&s->gb);
1377 f_code = get_bits(&s->gb, 3);
1378 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1381 s->mpeg_f_code[1][0] = f_code;
1382 s->mpeg_f_code[1][1] = f_code;
1384 s->current_picture.f.pict_type = s->pict_type;
1385 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1387 if (avctx->debug & FF_DEBUG_PICT_INFO)
1388 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1395 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1397 MpegEncContext *s= &s1->mpeg_enc_ctx;
1398 int horiz_size_ext, vert_size_ext;
1401 skip_bits(&s->gb, 1); /* profile and level esc*/
1402 s->avctx->profile = get_bits(&s->gb, 3);
1403 s->avctx->level = get_bits(&s->gb, 4);
1404 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1405 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1406 horiz_size_ext = get_bits(&s->gb, 2);
1407 vert_size_ext = get_bits(&s->gb, 2);
1408 s->width |= (horiz_size_ext << 12);
1409 s->height |= (vert_size_ext << 12);
1410 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1411 s->bit_rate += (bit_rate_ext << 18) * 400;
1412 skip_bits1(&s->gb); /* marker */
1413 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1415 s->low_delay = get_bits1(&s->gb);
1416 if (s->flags & CODEC_FLAG_LOW_DELAY)
1419 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1420 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1422 av_dlog(s->avctx, "sequence extension\n");
1423 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
1425 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1426 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1427 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1431 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1433 MpegEncContext *s = &s1->mpeg_enc_ctx;
1434 int color_description, w, h;
1436 skip_bits(&s->gb, 3); /* video format */
1437 color_description = get_bits1(&s->gb);
1438 if (color_description) {
1439 s->avctx->color_primaries = get_bits(&s->gb, 8);
1440 s->avctx->color_trc = get_bits(&s->gb, 8);
1441 s->avctx->colorspace = get_bits(&s->gb, 8);
1443 w = get_bits(&s->gb, 14);
1444 skip_bits(&s->gb, 1); //marker
1445 h = get_bits(&s->gb, 14);
1446 // remaining 3 bits are zero padding
1448 s1->pan_scan.width = 16 * w;
1449 s1->pan_scan.height = 16 * h;
1451 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1452 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1455 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1457 MpegEncContext *s = &s1->mpeg_enc_ctx;
1461 if (s->progressive_sequence) {
1462 if (s->repeat_first_field) {
1464 if (s->top_field_first)
1468 if (s->picture_structure == PICT_FRAME) {
1470 if (s->repeat_first_field)
1474 for (i = 0; i < nofco; i++) {
1475 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1476 skip_bits(&s->gb, 1); // marker
1477 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1478 skip_bits(&s->gb, 1); // marker
1481 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1482 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1483 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1484 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1485 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1488 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1492 for (i = 0; i < 64; i++) {
1493 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1494 int v = get_bits(&s->gb, 8);
1496 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1499 if (intra && i == 0 && v != 8) {
1500 av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1501 v = 8; // needed by pink.mpg / issue1046
1510 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1512 av_dlog(s->avctx, "matrix extension\n");
1514 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1515 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1516 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1517 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1520 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1522 MpegEncContext *s = &s1->mpeg_enc_ctx;
1524 s->full_pel[0] = s->full_pel[1] = 0;
1525 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1526 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1527 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1528 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1529 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1530 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1531 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1532 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1533 s->pict_type = AV_PICTURE_TYPE_I;
1535 s->pict_type = AV_PICTURE_TYPE_P;
1537 s->pict_type = AV_PICTURE_TYPE_B;
1538 s->current_picture.f.pict_type = s->pict_type;
1539 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1541 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1542 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1543 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1544 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1546 s->intra_dc_precision = get_bits(&s->gb, 2);
1547 s->picture_structure = get_bits(&s->gb, 2);
1548 s->top_field_first = get_bits1(&s->gb);
1549 s->frame_pred_frame_dct = get_bits1(&s->gb);
1550 s->concealment_motion_vectors = get_bits1(&s->gb);
1551 s->q_scale_type = get_bits1(&s->gb);
1552 s->intra_vlc_format = get_bits1(&s->gb);
1553 s->alternate_scan = get_bits1(&s->gb);
1554 s->repeat_first_field = get_bits1(&s->gb);
1555 s->chroma_420_type = get_bits1(&s->gb);
1556 s->progressive_frame = get_bits1(&s->gb);
1558 if (s->progressive_sequence && !s->progressive_frame) {
1559 s->progressive_frame = 1;
1560 av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1563 if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1564 av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1565 s->picture_structure = PICT_FRAME;
1568 if (s->progressive_sequence && !s->frame_pred_frame_dct) {
1569 av_log(s->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
1572 if (s->picture_structure == PICT_FRAME) {
1574 s->v_edge_pos = 16 * s->mb_height;
1576 s->first_field ^= 1;
1577 s->v_edge_pos = 8 * s->mb_height;
1578 memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1581 if (s->alternate_scan) {
1582 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1583 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1585 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1586 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1589 /* composite display not parsed */
1590 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1591 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1592 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1593 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1594 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1595 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1596 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1597 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1598 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1601 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1603 AVCodecContext *avctx = s->avctx;
1604 Mpeg1Context *s1 = (Mpeg1Context*)s;
1606 /* start frame decoding */
1607 if (s->first_field || s->picture_structure == PICT_FRAME) {
1608 if (ff_MPV_frame_start(s, avctx) < 0)
1611 ff_er_frame_start(s);
1613 /* first check if we must repeat the frame */
1614 s->current_picture_ptr->f.repeat_pict = 0;
1615 if (s->repeat_first_field) {
1616 if (s->progressive_sequence) {
1617 if (s->top_field_first)
1618 s->current_picture_ptr->f.repeat_pict = 4;
1620 s->current_picture_ptr->f.repeat_pict = 2;
1621 } else if (s->progressive_frame) {
1622 s->current_picture_ptr->f.repeat_pict = 1;
1626 *s->current_picture_ptr->f.pan_scan = s1->pan_scan;
1628 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1629 ff_thread_finish_setup(avctx);
1630 } else { // second field
1633 if (!s->current_picture_ptr) {
1634 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1638 if (s->avctx->hwaccel &&
1639 (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
1640 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1641 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n");
1644 for (i = 0; i < 4; i++) {
1645 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1646 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1647 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1652 if (avctx->hwaccel) {
1653 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1657 // MPV_frame_start will call this function too,
1658 // but we need to call it on every field
1659 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1660 if (ff_xvmc_field_start(s, avctx) < 0)
1666 #define DECODE_SLICE_ERROR -1
1667 #define DECODE_SLICE_OK 0
1671 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1672 * @return DECODE_SLICE_ERROR if the slice is damaged,
1673 * DECODE_SLICE_OK if this slice is OK
1675 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1676 const uint8_t **buf, int buf_size)
1678 AVCodecContext *avctx = s->avctx;
1679 const int field_pic = s->picture_structure != PICT_FRAME;
1682 s->resync_mb_y = -1;
1684 assert(mb_y < s->mb_height);
1686 init_get_bits(&s->gb, *buf, buf_size * 8);
1687 if(s->codec_id != CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1688 skip_bits(&s->gb, 3);
1690 ff_mpeg1_clean_buffers(s);
1691 s->interlaced_dct = 0;
1693 s->qscale = get_qscale(s);
1695 if (s->qscale == 0) {
1696 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1700 /* extra slice info */
1701 while (get_bits1(&s->gb) != 0) {
1702 skip_bits(&s->gb, 8);
1707 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1710 while (get_bits_left(&s->gb) > 0) {
1711 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1713 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1720 /* otherwise, stuffing, nothing to do */
1728 if (s->mb_x >= (unsigned)s->mb_width) {
1729 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1733 if (avctx->hwaccel) {
1734 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1735 int start_code = -1;
1736 buf_end = avpriv_mpv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1737 if (buf_end < *buf + buf_size)
1740 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1741 return DECODE_SLICE_ERROR;
1743 return DECODE_SLICE_OK;
1746 s->resync_mb_x = s->mb_x;
1747 s->resync_mb_y = s->mb_y = mb_y;
1749 ff_init_block_index(s);
1751 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1752 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1753 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",
1754 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],
1755 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")),
1756 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1757 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1758 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1763 // If 1, we memcpy blocks in xvmcvideo.
1764 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1765 ff_xvmc_init_block(s); // set s->block
1767 if (mpeg_decode_mb(s, s->block) < 0)
1770 if (s->current_picture.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1771 const int wrap = s->b8_stride;
1772 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1773 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1774 int motion_x, motion_y, dir, i;
1776 for (i = 0; i < 2; i++) {
1777 for (dir = 0; dir < 2; dir++) {
1778 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1779 motion_x = motion_y = 0;
1780 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1781 motion_x = s->mv[dir][0][0];
1782 motion_y = s->mv[dir][0][1];
1783 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1784 motion_x = s->mv[dir][i][0];
1785 motion_y = s->mv[dir][i][1];
1788 s->current_picture.f.motion_val[dir][xy ][0] = motion_x;
1789 s->current_picture.f.motion_val[dir][xy ][1] = motion_y;
1790 s->current_picture.f.motion_val[dir][xy + 1][0] = motion_x;
1791 s->current_picture.f.motion_val[dir][xy + 1][1] = motion_y;
1792 s->current_picture.f.ref_index [dir][b8_xy ] =
1793 s->current_picture.f.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1794 assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1802 s->dest[1] += 16 >> s->chroma_x_shift;
1803 s->dest[2] += 16 >> s->chroma_x_shift;
1805 ff_MPV_decode_mb(s, s->block);
1807 if (++s->mb_x >= s->mb_width) {
1808 const int mb_size = 16;
1810 ff_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1811 ff_MPV_report_decode_progress(s);
1814 s->mb_y += 1 << field_pic;
1816 if (s->mb_y >= s->mb_height) {
1817 int left = get_bits_left(&s->gb);
1818 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1819 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1820 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1822 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1823 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1824 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1830 ff_init_block_index(s);
1833 /* skip mb handling */
1834 if (s->mb_skip_run == -1) {
1835 /* read increment again */
1838 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1840 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1845 s->mb_skip_run += 33;
1846 } else if (code == 35) {
1847 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1848 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1851 goto eos; /* end of slice */
1853 /* otherwise, stuffing, nothing to do */
1855 s->mb_skip_run += code;
1859 if (s->mb_skip_run) {
1861 if (s->pict_type == AV_PICTURE_TYPE_I) {
1862 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1868 for (i = 0; i < 12; i++)
1869 s->block_last_index[i] = -1;
1870 if (s->picture_structure == PICT_FRAME)
1871 s->mv_type = MV_TYPE_16X16;
1873 s->mv_type = MV_TYPE_FIELD;
1874 if (s->pict_type == AV_PICTURE_TYPE_P) {
1875 /* if P type, zero motion vector is implied */
1876 s->mv_dir = MV_DIR_FORWARD;
1877 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1878 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1879 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1880 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1882 /* if B type, reuse previous vectors and directions */
1883 s->mv[0][0][0] = s->last_mv[0][0][0];
1884 s->mv[0][0][1] = s->last_mv[0][0][1];
1885 s->mv[1][0][0] = s->last_mv[1][0][0];
1886 s->mv[1][0][1] = s->last_mv[1][0][1];
1891 eos: // end of slice
1892 *buf += (get_bits_count(&s->gb)-1)/8;
1893 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1897 static int slice_decode_thread(AVCodecContext *c, void *arg)
1899 MpegEncContext *s = *(void**)arg;
1900 const uint8_t *buf = s->gb.buffer;
1901 int mb_y = s->start_mb_y;
1902 const int field_pic = s->picture_structure != PICT_FRAME;
1904 s->error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1907 uint32_t start_code;
1910 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1912 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1913 //ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
1915 if (c->err_recognition & AV_EF_EXPLODE)
1917 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1918 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
1920 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_AC_END | ER_DC_END | ER_MV_END);
1923 if (s->mb_y == s->end_mb_y)
1927 buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code);
1928 mb_y= start_code - SLICE_MIN_START_CODE;
1929 if(s->codec_id != CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1930 mb_y += (*buf&0xE0)<<2;
1932 if (s->picture_structure == PICT_BOTTOM_FIELD)
1934 if (mb_y < 0 || mb_y >= s->end_mb_y)
1940 * Handle slice ends.
1941 * @return 1 if it seems to be the last slice
1943 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1945 Mpeg1Context *s1 = avctx->priv_data;
1946 MpegEncContext *s = &s1->mpeg_enc_ctx;
1948 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1951 if (s->avctx->hwaccel) {
1952 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1953 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1956 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1957 ff_xvmc_field_end(s);
1959 /* end of slice reached */
1960 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1963 s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_MPEG2;
1967 ff_MPV_frame_end(s);
1969 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1970 *pict = s->current_picture_ptr->f;
1971 ff_print_debug_info(s, pict);
1973 if (avctx->active_thread_type & FF_THREAD_FRAME)
1974 s->picture_number++;
1975 /* latency of 1 frame for I- and P-frames */
1976 /* XXX: use another variable than picture_number */
1977 if (s->last_picture_ptr != NULL) {
1978 *pict = s->last_picture_ptr->f;
1979 ff_print_debug_info(s, pict);
1989 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1990 const uint8_t *buf, int buf_size)
1992 Mpeg1Context *s1 = avctx->priv_data;
1993 MpegEncContext *s = &s1->mpeg_enc_ctx;
1997 init_get_bits(&s->gb, buf, buf_size*8);
1999 width = get_bits(&s->gb, 12);
2000 height = get_bits(&s->gb, 12);
2001 if (width <= 0 || height <= 0)
2003 s->aspect_ratio_info = get_bits(&s->gb, 4);
2004 if (s->aspect_ratio_info == 0) {
2005 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2006 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
2009 s->frame_rate_index = get_bits(&s->gb, 4);
2010 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2012 s->bit_rate = get_bits(&s->gb, 18) * 400;
2013 if (get_bits1(&s->gb) == 0) /* marker */
2018 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2019 skip_bits(&s->gb, 1);
2022 if (get_bits1(&s->gb)) {
2023 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2025 for (i = 0; i < 64; i++) {
2026 j = s->dsp.idct_permutation[i];
2027 v = ff_mpeg1_default_intra_matrix[i];
2028 s->intra_matrix[j] = v;
2029 s->chroma_intra_matrix[j] = v;
2032 if (get_bits1(&s->gb)) {
2033 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2035 for (i = 0; i < 64; i++) {
2036 int j = s->dsp.idct_permutation[i];
2037 v = ff_mpeg1_default_non_intra_matrix[i];
2038 s->inter_matrix[j] = v;
2039 s->chroma_inter_matrix[j] = v;
2043 if (show_bits(&s->gb, 23) != 0) {
2044 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2048 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2049 s->progressive_sequence = 1;
2050 s->progressive_frame = 1;
2051 s->picture_structure = PICT_FRAME;
2053 s->frame_pred_frame_dct = 1;
2054 s->chroma_format = 1;
2055 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2056 s->out_format = FMT_MPEG1;
2057 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2058 if (s->flags & CODEC_FLAG_LOW_DELAY)
2061 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2062 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2063 s->avctx->rc_buffer_size, s->bit_rate);
2068 static int vcr2_init_sequence(AVCodecContext *avctx)
2070 Mpeg1Context *s1 = avctx->priv_data;
2071 MpegEncContext *s = &s1->mpeg_enc_ctx;
2074 /* start new MPEG-1 context decoding */
2075 s->out_format = FMT_MPEG1;
2076 if (s1->mpeg_enc_ctx_allocated) {
2077 ff_MPV_common_end(s);
2079 s->width = avctx->coded_width;
2080 s->height = avctx->coded_height;
2081 avctx->has_b_frames = 0; // true?
2084 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2085 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2087 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel )
2088 if (avctx->idct_algo == FF_IDCT_AUTO)
2089 avctx->idct_algo = FF_IDCT_SIMPLE;
2091 if (ff_MPV_common_init(s) < 0)
2093 s1->mpeg_enc_ctx_allocated = 1;
2095 for (i = 0; i < 64; i++) {
2096 int j = s->dsp.idct_permutation[i];
2097 v = ff_mpeg1_default_intra_matrix[i];
2098 s->intra_matrix[j] = v;
2099 s->chroma_intra_matrix[j] = v;
2101 v = ff_mpeg1_default_non_intra_matrix[i];
2102 s->inter_matrix[j] = v;
2103 s->chroma_inter_matrix[j] = v;
2106 s->progressive_sequence = 1;
2107 s->progressive_frame = 1;
2108 s->picture_structure = PICT_FRAME;
2110 s->frame_pred_frame_dct = 1;
2111 s->chroma_format = 1;
2112 if (s->codec_tag == AV_RL32("BW10")) {
2113 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2115 exchange_uv(s); // common init reset pblocks, so we swap them here
2116 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2117 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
2119 s1->save_width = s->width;
2120 s1->save_height = s->height;
2121 s1->save_progressive_seq = s->progressive_sequence;
2126 static void mpeg_decode_user_data(AVCodecContext *avctx,
2127 const uint8_t *p, int buf_size)
2129 Mpeg1Context *s = avctx->priv_data;
2130 const uint8_t *buf_end = p + buf_size;
2135 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2139 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2140 av_log(0,0, "%c", p[i]);
2142 av_log(0,0, "\n");*/
2145 /* we parse the DTG active format information */
2146 if (buf_end - p >= 5 &&
2147 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2155 if (buf_end - p < 1)
2157 avctx->dtg_active_format = p[0] & 0x0f;
2162 static void mpeg_decode_gop(AVCodecContext *avctx,
2163 const uint8_t *buf, int buf_size)
2165 Mpeg1Context *s1 = avctx->priv_data;
2166 MpegEncContext *s = &s1->mpeg_enc_ctx;
2170 init_get_bits(&s->gb, buf, buf_size*8);
2172 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2174 s->closed_gop = get_bits1(&s->gb);
2175 /*broken_link indicate that after editing the
2176 reference frames of the first B-Frames after GOP I-Frame
2177 are missing (open gop)*/
2178 broken_link = get_bits1(&s->gb);
2180 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2181 char tcbuf[AV_TIMECODE_STR_SIZE];
2182 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2183 av_log(s->avctx, AV_LOG_DEBUG,
2184 "GOP (%s) closed_gop=%d broken_link=%d\n",
2185 tcbuf, s->closed_gop, broken_link);
2189 * Find the end of the current frame in the bitstream.
2190 * @return the position of the first byte of the next frame, or -1
2192 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2195 uint32_t state = pc->state;
2197 /* EOF considered as end of frame */
2202 0 frame start -> 1/4
2203 1 first_SEQEXT -> 0/2
2204 2 first field start -> 3/0
2205 3 second_SEQEXT -> 2/0
2209 for (i = 0; i < buf_size; i++) {
2210 assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4);
2211 if (pc->frame_start_found & 1) {
2212 if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80)
2213 pc->frame_start_found--;
2214 else if (state == EXT_START_CODE + 2) {
2215 if ((buf[i] & 3) == 3)
2216 pc->frame_start_found = 0;
2218 pc->frame_start_found = (pc->frame_start_found + 1) & 3;
2222 i = avpriv_mpv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1;
2223 if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) {
2225 pc->frame_start_found = 4;
2227 if (state == SEQ_END_CODE) {
2228 pc->frame_start_found = 0;
2232 if (pc->frame_start_found == 2 && state == SEQ_START_CODE)
2233 pc->frame_start_found = 0;
2234 if (pc->frame_start_found < 4 && state == EXT_START_CODE)
2235 pc->frame_start_found++;
2236 if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) {
2237 if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) {
2238 pc->frame_start_found = 0;
2243 if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) {
2244 ff_fetch_timestamp(s, i - 3, 1);
2249 return END_NOT_FOUND;
2252 static int decode_chunks(AVCodecContext *avctx,
2253 AVFrame *picture, int *data_size,
2254 const uint8_t *buf, int buf_size);
2256 /* handle buffering and image synchronisation */
2257 static int mpeg_decode_frame(AVCodecContext *avctx,
2258 void *data, int *data_size,
2261 const uint8_t *buf = avpkt->data;
2262 int buf_size = avpkt->size;
2263 Mpeg1Context *s = avctx->priv_data;
2264 AVFrame *picture = data;
2265 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2266 av_dlog(avctx, "fill_buffer\n");
2268 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2269 /* special case for last picture */
2270 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2271 *picture = s2->next_picture_ptr->f;
2272 s2->next_picture_ptr = NULL;
2274 *data_size = sizeof(AVFrame);
2279 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2280 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2282 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2286 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2287 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2288 || s2->codec_tag == AV_RL32("BW10")
2290 vcr2_init_sequence(avctx);
2294 if (avctx->extradata && !s->parsed_extra) {
2295 int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2297 av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2300 s->parsed_extra = 1;
2301 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2305 return decode_chunks(avctx, picture, data_size, buf, buf_size);
2308 static int decode_chunks(AVCodecContext *avctx,
2309 AVFrame *picture, int *data_size,
2310 const uint8_t *buf, int buf_size)
2312 Mpeg1Context *s = avctx->priv_data;
2313 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2314 const uint8_t *buf_ptr = buf;
2315 const uint8_t *buf_end = buf + buf_size;
2316 int ret, input_size;
2320 /* find next start code */
2321 uint32_t start_code = -1;
2322 buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
2323 if (start_code > 0x1ff) {
2324 if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
2325 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2327 av_assert0(avctx->thread_count > 1);
2329 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2330 for (i = 0; i < s->slice_count; i++)
2331 s2->error_count += s2->thread_context[i]->error_count;
2334 if (CONFIG_VDPAU && uses_vdpau(avctx))
2335 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2338 if (slice_end(avctx, picture)) {
2339 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2340 *data_size = sizeof(AVPicture);
2344 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2347 input_size = buf_end - buf_ptr;
2349 if (avctx->debug & FF_DEBUG_STARTCODE) {
2350 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2353 /* prepare data for next start code */
2354 switch (start_code) {
2355 case SEQ_START_CODE:
2356 if (last_code == 0) {
2357 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2358 if(buf != avctx->extradata)
2361 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2362 if (avctx->err_recognition & AV_EF_EXPLODE)
2363 return AVERROR_INVALIDDATA;
2367 case PICTURE_START_CODE:
2369 s2->intra_dc_precision= 3;
2370 s2->intra_matrix[0]= 1;
2372 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
2375 avctx->execute(avctx, slice_decode_thread,
2376 s2->thread_context, NULL,
2377 s->slice_count, sizeof(void*));
2378 for (i = 0; i < s->slice_count; i++)
2379 s2->error_count += s2->thread_context[i]->error_count;
2382 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2383 ret = mpeg_decode_postinit(avctx);
2385 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2389 /* we have a complete image: we try to decompress it */
2390 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2392 s2->first_slice = 1;
2393 last_code = PICTURE_START_CODE;
2395 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2396 if (avctx->err_recognition & AV_EF_EXPLODE)
2397 return AVERROR_INVALIDDATA;
2400 case EXT_START_CODE:
2401 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2403 switch (get_bits(&s2->gb, 4)) {
2405 if (last_code == 0) {
2406 mpeg_decode_sequence_extension(s);
2408 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2409 if (avctx->err_recognition & AV_EF_EXPLODE)
2410 return AVERROR_INVALIDDATA;
2414 mpeg_decode_sequence_display_extension(s);
2417 mpeg_decode_quant_matrix_extension(s2);
2420 mpeg_decode_picture_display_extension(s);
2423 if (last_code == PICTURE_START_CODE) {
2424 mpeg_decode_picture_coding_extension(s);
2426 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2427 if (avctx->err_recognition & AV_EF_EXPLODE)
2428 return AVERROR_INVALIDDATA;
2433 case USER_START_CODE:
2434 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2436 case GOP_START_CODE:
2437 if (last_code == 0) {
2439 mpeg_decode_gop(avctx, buf_ptr, input_size);
2442 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2443 if (avctx->err_recognition & AV_EF_EXPLODE)
2444 return AVERROR_INVALIDDATA;
2448 if (start_code >= SLICE_MIN_START_CODE &&
2449 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2450 const int field_pic = s2->picture_structure != PICT_FRAME;
2451 int mb_y = start_code - SLICE_MIN_START_CODE;
2452 last_code = SLICE_MIN_START_CODE;
2453 if(s2->codec_id != CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2454 mb_y += (*buf_ptr&0xE0)<<2;
2457 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2460 if (mb_y >= s2->mb_height) {
2461 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2465 if (s2->last_picture_ptr == NULL) {
2466 /* Skip B-frames if we do not have reference frames and gop is not closed */
2467 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2468 if (!s2->closed_gop)
2472 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2474 if (s2->next_picture_ptr == NULL) {
2475 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2476 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break;
2478 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2479 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2480 avctx->skip_frame >= AVDISCARD_ALL)
2483 if (!s->mpeg_enc_ctx_allocated)
2486 if (s2->codec_id == CODEC_ID_MPEG2VIDEO) {
2487 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2491 if (!s2->pict_type) {
2492 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2493 if (avctx->err_recognition & AV_EF_EXPLODE)
2494 return AVERROR_INVALIDDATA;
2498 if (s2->first_slice) {
2499 s2->first_slice = 0;
2500 if (mpeg_field_start(s2, buf, buf_size) < 0)
2503 if (!s2->current_picture_ptr) {
2504 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2505 return AVERROR_INVALIDDATA;
2508 if (uses_vdpau(avctx)) {
2513 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2514 int threshold = (s2->mb_height * s->slice_count +
2515 s2->slice_context_count / 2) /
2516 s2->slice_context_count;
2517 av_assert0(avctx->thread_count > 1);
2518 if (threshold <= mb_y) {
2519 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2521 thread_context->start_mb_y = mb_y;
2522 thread_context->end_mb_y = s2->mb_height;
2523 if (s->slice_count) {
2524 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2525 ff_update_duplicate_context(thread_context, s2);
2527 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2530 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2532 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2536 if (avctx->err_recognition & AV_EF_EXPLODE)
2538 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2539 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2541 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, ER_AC_END | ER_DC_END | ER_MV_END);
2550 static void flush(AVCodecContext *avctx)
2552 Mpeg1Context *s = avctx->priv_data;
2556 ff_mpeg_flush(avctx);
2559 static int mpeg_decode_end(AVCodecContext *avctx)
2561 Mpeg1Context *s = avctx->priv_data;
2563 if (s->mpeg_enc_ctx_allocated)
2564 ff_MPV_common_end(&s->mpeg_enc_ctx);
2568 static const AVProfile mpeg2_video_profiles[] = {
2569 { FF_PROFILE_MPEG2_422, "4:2:2" },
2570 { FF_PROFILE_MPEG2_HIGH, "High" },
2571 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2572 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2573 { FF_PROFILE_MPEG2_MAIN, "Main" },
2574 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2575 { FF_PROFILE_RESERVED, "Reserved" },
2576 { FF_PROFILE_RESERVED, "Reserved" },
2577 { FF_PROFILE_UNKNOWN },
2581 AVCodec ff_mpeg1video_decoder = {
2582 .name = "mpeg1video",
2583 .type = AVMEDIA_TYPE_VIDEO,
2584 .id = CODEC_ID_MPEG1VIDEO,
2585 .priv_data_size = sizeof(Mpeg1Context),
2586 .init = mpeg_decode_init,
2587 .close = mpeg_decode_end,
2588 .decode = mpeg_decode_frame,
2589 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2590 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2591 CODEC_CAP_SLICE_THREADS,
2593 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2594 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2597 AVCodec ff_mpeg2video_decoder = {
2598 .name = "mpeg2video",
2599 .type = AVMEDIA_TYPE_VIDEO,
2600 .id = CODEC_ID_MPEG2VIDEO,
2601 .priv_data_size = sizeof(Mpeg1Context),
2602 .init = mpeg_decode_init,
2603 .close = mpeg_decode_end,
2604 .decode = mpeg_decode_frame,
2605 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2606 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2607 CODEC_CAP_SLICE_THREADS,
2609 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2610 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2614 AVCodec ff_mpegvideo_decoder = {
2615 .name = "mpegvideo",
2616 .type = AVMEDIA_TYPE_VIDEO,
2617 .id = CODEC_ID_MPEG2VIDEO,
2618 .priv_data_size = sizeof(Mpeg1Context),
2619 .init = mpeg_decode_init,
2620 .close = mpeg_decode_end,
2621 .decode = mpeg_decode_frame,
2622 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2625 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2628 #if CONFIG_MPEG_XVMC_DECODER
2629 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2631 if (avctx->active_thread_type & FF_THREAD_SLICE)
2633 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2635 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2636 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2638 mpeg_decode_init(avctx);
2640 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2641 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2646 AVCodec ff_mpeg_xvmc_decoder = {
2647 .name = "mpegvideo_xvmc",
2648 .type = AVMEDIA_TYPE_VIDEO,
2649 .id = CODEC_ID_MPEG2VIDEO_XVMC,
2650 .priv_data_size = sizeof(Mpeg1Context),
2651 .init = mpeg_mc_decode_init,
2652 .close = mpeg_decode_end,
2653 .decode = mpeg_decode_frame,
2654 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2655 CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2657 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2662 #if CONFIG_MPEG_VDPAU_DECODER
2663 AVCodec ff_mpeg_vdpau_decoder = {
2664 .name = "mpegvideo_vdpau",
2665 .type = AVMEDIA_TYPE_VIDEO,
2666 .id = CODEC_ID_MPEG2VIDEO,
2667 .priv_data_size = sizeof(Mpeg1Context),
2668 .init = mpeg_decode_init,
2669 .close = mpeg_decode_end,
2670 .decode = mpeg_decode_frame,
2671 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2672 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2674 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2678 #if CONFIG_MPEG1_VDPAU_DECODER
2679 AVCodec ff_mpeg1_vdpau_decoder = {
2680 .name = "mpeg1video_vdpau",
2681 .type = AVMEDIA_TYPE_VIDEO,
2682 .id = CODEC_ID_MPEG1VIDEO,
2683 .priv_data_size = sizeof(Mpeg1Context),
2684 .init = mpeg_decode_init,
2685 .close = mpeg_decode_end,
2686 .decode = mpeg_decode_frame,
2687 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED |
2688 CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2690 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),