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 assert((avctx->sub_id == 1) == (avctx->codec_id == CODEC_ID_MPEG1VIDEO));
1280 if (avctx->codec_id == CODEC_ID_MPEG1VIDEO) {
1282 avctx->time_base.den = avpriv_frame_rate_tab[s->frame_rate_index].num;
1283 avctx->time_base.num = avpriv_frame_rate_tab[s->frame_rate_index].den;
1285 avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1286 avctx->ticks_per_frame=1;
1289 av_reduce(&s->avctx->time_base.den,
1290 &s->avctx->time_base.num,
1291 avpriv_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1292 avpriv_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1294 avctx->ticks_per_frame = 2;
1296 if (s->aspect_ratio_info > 1) {
1298 av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1299 (AVRational) {s1->pan_scan.width, s1->pan_scan.height}),
1300 (AVRational) {s->width, s->height});
1302 // we ignore the spec here and guess a bit as reality does not match the spec, see for example
1303 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1304 // issue1613, 621, 562
1305 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
1306 (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) {
1307 s->avctx->sample_aspect_ratio =
1308 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1309 (AVRational) {s->width, s->height});
1311 s->avctx->sample_aspect_ratio =
1312 av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info],
1313 (AVRational) {s1->pan_scan.width, s1->pan_scan.height});
1314 //issue1613 4/3 16/9 -> 16/9
1315 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1316 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1317 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
1318 //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);
1319 //av_log(NULL, AV_LOG_ERROR, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den);
1322 s->avctx->sample_aspect_ratio =
1323 ff_mpeg2_aspect[s->aspect_ratio_info];
1327 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1328 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1329 // until then pix_fmt may be changed right after codec init
1330 if (avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
1332 if (avctx->idct_algo == FF_IDCT_AUTO)
1333 avctx->idct_algo = FF_IDCT_SIMPLE;
1335 /* Quantization matrices may need reordering
1336 * if DCT permutation is changed. */
1337 memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t));
1339 if (ff_MPV_common_init(s) < 0)
1342 quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation);
1343 quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation);
1344 quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation);
1345 quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation);
1347 s1->mpeg_enc_ctx_allocated = 1;
1352 static int mpeg1_decode_picture(AVCodecContext *avctx,
1353 const uint8_t *buf, int buf_size)
1355 Mpeg1Context *s1 = avctx->priv_data;
1356 MpegEncContext *s = &s1->mpeg_enc_ctx;
1357 int ref, f_code, vbv_delay;
1359 init_get_bits(&s->gb, buf, buf_size*8);
1361 ref = get_bits(&s->gb, 10); /* temporal ref */
1362 s->pict_type = get_bits(&s->gb, 3);
1363 if (s->pict_type == 0 || s->pict_type > 3)
1366 vbv_delay = get_bits(&s->gb, 16);
1367 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1368 s->full_pel[0] = get_bits1(&s->gb);
1369 f_code = get_bits(&s->gb, 3);
1370 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)))
1380 s->mpeg_f_code[1][0] = f_code;
1381 s->mpeg_f_code[1][1] = f_code;
1383 s->current_picture.f.pict_type = s->pict_type;
1384 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1386 if (avctx->debug & FF_DEBUG_PICT_INFO)
1387 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1394 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1396 MpegEncContext *s= &s1->mpeg_enc_ctx;
1397 int horiz_size_ext, vert_size_ext;
1400 skip_bits(&s->gb, 1); /* profile and level esc*/
1401 s->avctx->profile = get_bits(&s->gb, 3);
1402 s->avctx->level = get_bits(&s->gb, 4);
1403 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1404 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1405 horiz_size_ext = get_bits(&s->gb, 2);
1406 vert_size_ext = get_bits(&s->gb, 2);
1407 s->width |= (horiz_size_ext << 12);
1408 s->height |= (vert_size_ext << 12);
1409 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1410 s->bit_rate += (bit_rate_ext << 18) * 400;
1411 skip_bits1(&s->gb); /* marker */
1412 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1414 s->low_delay = get_bits1(&s->gb);
1415 if (s->flags & CODEC_FLAG_LOW_DELAY)
1418 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1419 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1421 av_dlog(s->avctx, "sequence extension\n");
1422 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
1423 s->avctx->sub_id = 2; /* indicates MPEG-2 found */
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->intra_dc_precision = get_bits(&s->gb, 2);
1542 s->picture_structure = get_bits(&s->gb, 2);
1543 s->top_field_first = get_bits1(&s->gb);
1544 s->frame_pred_frame_dct = get_bits1(&s->gb);
1545 s->concealment_motion_vectors = get_bits1(&s->gb);
1546 s->q_scale_type = get_bits1(&s->gb);
1547 s->intra_vlc_format = get_bits1(&s->gb);
1548 s->alternate_scan = get_bits1(&s->gb);
1549 s->repeat_first_field = get_bits1(&s->gb);
1550 s->chroma_420_type = get_bits1(&s->gb);
1551 s->progressive_frame = get_bits1(&s->gb);
1553 if (s->progressive_sequence && !s->progressive_frame) {
1554 s->progressive_frame = 1;
1555 av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1558 if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1559 av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1560 s->picture_structure = PICT_FRAME;
1563 if (s->progressive_sequence && !s->frame_pred_frame_dct) {
1564 av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
1567 if (s->picture_structure == PICT_FRAME) {
1569 s->v_edge_pos = 16 * s->mb_height;
1571 s->first_field ^= 1;
1572 s->v_edge_pos = 8 * s->mb_height;
1573 memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1576 if (s->alternate_scan) {
1577 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1578 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1580 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1581 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1584 /* composite display not parsed */
1585 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1586 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1587 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1588 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1589 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1590 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1591 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1592 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1593 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1596 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1598 AVCodecContext *avctx = s->avctx;
1599 Mpeg1Context *s1 = (Mpeg1Context*)s;
1601 /* start frame decoding */
1602 if (s->first_field || s->picture_structure == PICT_FRAME) {
1603 if (ff_MPV_frame_start(s, avctx) < 0)
1606 ff_er_frame_start(s);
1608 /* first check if we must repeat the frame */
1609 s->current_picture_ptr->f.repeat_pict = 0;
1610 if (s->repeat_first_field) {
1611 if (s->progressive_sequence) {
1612 if (s->top_field_first)
1613 s->current_picture_ptr->f.repeat_pict = 4;
1615 s->current_picture_ptr->f.repeat_pict = 2;
1616 } else if (s->progressive_frame) {
1617 s->current_picture_ptr->f.repeat_pict = 1;
1621 *s->current_picture_ptr->f.pan_scan = s1->pan_scan;
1623 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1624 ff_thread_finish_setup(avctx);
1625 } else { // second field
1628 if (!s->current_picture_ptr) {
1629 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1633 for (i = 0; i < 4; i++) {
1634 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1635 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1636 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1641 if (avctx->hwaccel) {
1642 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1646 // MPV_frame_start will call this function too,
1647 // but we need to call it on every field
1648 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1649 if (ff_xvmc_field_start(s, avctx) < 0)
1655 #define DECODE_SLICE_ERROR -1
1656 #define DECODE_SLICE_OK 0
1660 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1661 * @return DECODE_SLICE_ERROR if the slice is damaged,
1662 * DECODE_SLICE_OK if this slice is OK
1664 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1665 const uint8_t **buf, int buf_size)
1667 AVCodecContext *avctx = s->avctx;
1668 const int lowres = s->avctx->lowres;
1669 const int field_pic = s->picture_structure != PICT_FRAME;
1672 s->resync_mb_y = -1;
1674 assert(mb_y < s->mb_height);
1676 init_get_bits(&s->gb, *buf, buf_size * 8);
1678 ff_mpeg1_clean_buffers(s);
1679 s->interlaced_dct = 0;
1681 s->qscale = get_qscale(s);
1683 if (s->qscale == 0) {
1684 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1688 /* extra slice info */
1689 while (get_bits1(&s->gb) != 0) {
1690 skip_bits(&s->gb, 8);
1695 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1698 while (get_bits_left(&s->gb) > 0) {
1699 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1701 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1708 /* otherwise, stuffing, nothing to do */
1716 if (s->mb_x >= (unsigned)s->mb_width) {
1717 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1721 if (avctx->hwaccel) {
1722 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1723 int start_code = -1;
1724 buf_end = avpriv_mpv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1725 if (buf_end < *buf + buf_size)
1728 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1729 return DECODE_SLICE_ERROR;
1731 return DECODE_SLICE_OK;
1734 s->resync_mb_x = s->mb_x;
1735 s->resync_mb_y = s->mb_y = mb_y;
1737 ff_init_block_index(s);
1739 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1740 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1741 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",
1742 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],
1743 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")),
1744 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1745 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1746 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1751 // If 1, we memcpy blocks in xvmcvideo.
1752 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1753 ff_xvmc_init_block(s); // set s->block
1755 if (mpeg_decode_mb(s, s->block) < 0)
1758 if (s->current_picture.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1759 const int wrap = s->b8_stride;
1760 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1761 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1762 int motion_x, motion_y, dir, i;
1764 for (i = 0; i < 2; i++) {
1765 for (dir = 0; dir < 2; dir++) {
1766 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1767 motion_x = motion_y = 0;
1768 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1769 motion_x = s->mv[dir][0][0];
1770 motion_y = s->mv[dir][0][1];
1771 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1772 motion_x = s->mv[dir][i][0];
1773 motion_y = s->mv[dir][i][1];
1776 s->current_picture.f.motion_val[dir][xy ][0] = motion_x;
1777 s->current_picture.f.motion_val[dir][xy ][1] = motion_y;
1778 s->current_picture.f.motion_val[dir][xy + 1][0] = motion_x;
1779 s->current_picture.f.motion_val[dir][xy + 1][1] = motion_y;
1780 s->current_picture.f.ref_index [dir][b8_xy ] =
1781 s->current_picture.f.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1782 assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1789 s->dest[0] += 16 >> lowres;
1790 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1791 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1793 ff_MPV_decode_mb(s, s->block);
1795 if (++s->mb_x >= s->mb_width) {
1796 const int mb_size = 16 >> s->avctx->lowres;
1798 ff_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1799 ff_MPV_report_decode_progress(s);
1802 s->mb_y += 1 << field_pic;
1804 if (s->mb_y >= s->mb_height) {
1805 int left = get_bits_left(&s->gb);
1806 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1807 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1808 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1810 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1811 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1812 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1818 ff_init_block_index(s);
1821 /* skip mb handling */
1822 if (s->mb_skip_run == -1) {
1823 /* read increment again */
1826 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1828 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1833 s->mb_skip_run += 33;
1834 } else if (code == 35) {
1835 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1836 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1839 goto eos; /* end of slice */
1841 /* otherwise, stuffing, nothing to do */
1843 s->mb_skip_run += code;
1847 if (s->mb_skip_run) {
1849 if (s->pict_type == AV_PICTURE_TYPE_I) {
1850 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1856 for (i = 0; i < 12; i++)
1857 s->block_last_index[i] = -1;
1858 if (s->picture_structure == PICT_FRAME)
1859 s->mv_type = MV_TYPE_16X16;
1861 s->mv_type = MV_TYPE_FIELD;
1862 if (s->pict_type == AV_PICTURE_TYPE_P) {
1863 /* if P type, zero motion vector is implied */
1864 s->mv_dir = MV_DIR_FORWARD;
1865 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1866 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1867 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1868 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1870 /* if B type, reuse previous vectors and directions */
1871 s->mv[0][0][0] = s->last_mv[0][0][0];
1872 s->mv[0][0][1] = s->last_mv[0][0][1];
1873 s->mv[1][0][0] = s->last_mv[1][0][0];
1874 s->mv[1][0][1] = s->last_mv[1][0][1];
1879 eos: // end of slice
1880 *buf += (get_bits_count(&s->gb)-1)/8;
1881 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1885 static int slice_decode_thread(AVCodecContext *c, void *arg)
1887 MpegEncContext *s = *(void**)arg;
1888 const uint8_t *buf = s->gb.buffer;
1889 int mb_y = s->start_mb_y;
1890 const int field_pic = s->picture_structure != PICT_FRAME;
1892 s->error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1895 uint32_t start_code;
1898 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1900 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1901 //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);
1903 if (c->err_recognition & AV_EF_EXPLODE)
1905 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1906 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);
1908 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);
1911 if (s->mb_y == s->end_mb_y)
1915 buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code);
1916 mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
1917 if (s->picture_structure == PICT_BOTTOM_FIELD)
1919 if (mb_y < 0 || mb_y >= s->end_mb_y)
1925 * Handle slice ends.
1926 * @return 1 if it seems to be the last slice
1928 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1930 Mpeg1Context *s1 = avctx->priv_data;
1931 MpegEncContext *s = &s1->mpeg_enc_ctx;
1933 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1936 if (s->avctx->hwaccel) {
1937 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1938 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1941 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1942 ff_xvmc_field_end(s);
1944 /* end of slice reached */
1945 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1948 s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_MPEG2;
1952 ff_MPV_frame_end(s);
1954 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1955 *pict = *(AVFrame*)s->current_picture_ptr;
1956 ff_print_debug_info(s, pict);
1958 if (avctx->active_thread_type & FF_THREAD_FRAME)
1959 s->picture_number++;
1960 /* latency of 1 frame for I- and P-frames */
1961 /* XXX: use another variable than picture_number */
1962 if (s->last_picture_ptr != NULL) {
1963 *pict = *(AVFrame*)s->last_picture_ptr;
1964 ff_print_debug_info(s, pict);
1974 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1975 const uint8_t *buf, int buf_size)
1977 Mpeg1Context *s1 = avctx->priv_data;
1978 MpegEncContext *s = &s1->mpeg_enc_ctx;
1982 init_get_bits(&s->gb, buf, buf_size*8);
1984 width = get_bits(&s->gb, 12);
1985 height = get_bits(&s->gb, 12);
1986 if (width <= 0 || height <= 0)
1988 s->aspect_ratio_info = get_bits(&s->gb, 4);
1989 if (s->aspect_ratio_info == 0) {
1990 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1991 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1994 s->frame_rate_index = get_bits(&s->gb, 4);
1995 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1997 s->bit_rate = get_bits(&s->gb, 18) * 400;
1998 if (get_bits1(&s->gb) == 0) /* marker */
2003 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2004 skip_bits(&s->gb, 1);
2007 if (get_bits1(&s->gb)) {
2008 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2010 for (i = 0; i < 64; i++) {
2011 j = s->dsp.idct_permutation[i];
2012 v = ff_mpeg1_default_intra_matrix[i];
2013 s->intra_matrix[j] = v;
2014 s->chroma_intra_matrix[j] = v;
2017 if (get_bits1(&s->gb)) {
2018 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2020 for (i = 0; i < 64; i++) {
2021 int j = s->dsp.idct_permutation[i];
2022 v = ff_mpeg1_default_non_intra_matrix[i];
2023 s->inter_matrix[j] = v;
2024 s->chroma_inter_matrix[j] = v;
2028 if (show_bits(&s->gb, 23) != 0) {
2029 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2033 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2034 s->progressive_sequence = 1;
2035 s->progressive_frame = 1;
2036 s->picture_structure = PICT_FRAME;
2038 s->frame_pred_frame_dct = 1;
2039 s->chroma_format = 1;
2040 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2041 avctx->sub_id = 1; /* indicates MPEG-1 */
2042 s->out_format = FMT_MPEG1;
2043 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2044 if (s->flags & CODEC_FLAG_LOW_DELAY)
2047 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2048 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2049 s->avctx->rc_buffer_size, s->bit_rate);
2054 static int vcr2_init_sequence(AVCodecContext *avctx)
2056 Mpeg1Context *s1 = avctx->priv_data;
2057 MpegEncContext *s = &s1->mpeg_enc_ctx;
2060 /* start new MPEG-1 context decoding */
2061 s->out_format = FMT_MPEG1;
2062 if (s1->mpeg_enc_ctx_allocated) {
2063 ff_MPV_common_end(s);
2065 s->width = avctx->coded_width;
2066 s->height = avctx->coded_height;
2067 avctx->has_b_frames = 0; // true?
2070 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2071 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2073 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel )
2074 if (avctx->idct_algo == FF_IDCT_AUTO)
2075 avctx->idct_algo = FF_IDCT_SIMPLE;
2077 if (ff_MPV_common_init(s) < 0)
2079 s1->mpeg_enc_ctx_allocated = 1;
2081 for (i = 0; i < 64; i++) {
2082 int j = s->dsp.idct_permutation[i];
2083 v = ff_mpeg1_default_intra_matrix[i];
2084 s->intra_matrix[j] = v;
2085 s->chroma_intra_matrix[j] = v;
2087 v = ff_mpeg1_default_non_intra_matrix[i];
2088 s->inter_matrix[j] = v;
2089 s->chroma_inter_matrix[j] = v;
2092 s->progressive_sequence = 1;
2093 s->progressive_frame = 1;
2094 s->picture_structure = PICT_FRAME;
2096 s->frame_pred_frame_dct = 1;
2097 s->chroma_format = 1;
2098 if (s->codec_tag == AV_RL32("BW10")) {
2099 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2100 avctx->sub_id = 1; /* indicates MPEG-1 */
2102 exchange_uv(s); // common init reset pblocks, so we swap them here
2103 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2104 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
2105 avctx->sub_id = 2; /* indicates MPEG-2 */
2107 s1->save_width = s->width;
2108 s1->save_height = s->height;
2109 s1->save_progressive_seq = s->progressive_sequence;
2114 static void mpeg_decode_user_data(AVCodecContext *avctx,
2115 const uint8_t *p, int buf_size)
2117 Mpeg1Context *s = avctx->priv_data;
2118 const uint8_t *buf_end = p + buf_size;
2123 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2127 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2128 av_log(0,0, "%c", p[i]);
2130 av_log(0,0, "\n");*/
2133 /* we parse the DTG active format information */
2134 if (buf_end - p >= 5 &&
2135 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2143 if (buf_end - p < 1)
2145 avctx->dtg_active_format = p[0] & 0x0f;
2150 static void mpeg_decode_gop(AVCodecContext *avctx,
2151 const uint8_t *buf, int buf_size)
2153 Mpeg1Context *s1 = avctx->priv_data;
2154 MpegEncContext *s = &s1->mpeg_enc_ctx;
2158 init_get_bits(&s->gb, buf, buf_size*8);
2160 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2162 s->closed_gop = get_bits1(&s->gb);
2163 /*broken_link indicate that after editing the
2164 reference frames of the first B-Frames after GOP I-Frame
2165 are missing (open gop)*/
2166 broken_link = get_bits1(&s->gb);
2168 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2169 char tcbuf[AV_TIMECODE_STR_SIZE];
2170 av_timecode_make_mpeg_tc_string(tcbuf, tc);
2171 av_log(s->avctx, AV_LOG_DEBUG,
2172 "GOP (%s) closed_gop=%d broken_link=%d\n",
2173 tcbuf, s->closed_gop, broken_link);
2177 * Find the end of the current frame in the bitstream.
2178 * @return the position of the first byte of the next frame, or -1
2180 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2183 uint32_t state = pc->state;
2185 /* EOF considered as end of frame */
2190 0 frame start -> 1/4
2191 1 first_SEQEXT -> 0/2
2192 2 first field start -> 3/0
2193 3 second_SEQEXT -> 2/0
2197 for (i = 0; i < buf_size; i++) {
2198 assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4);
2199 if (pc->frame_start_found & 1) {
2200 if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80)
2201 pc->frame_start_found--;
2202 else if (state == EXT_START_CODE + 2) {
2203 if ((buf[i] & 3) == 3)
2204 pc->frame_start_found = 0;
2206 pc->frame_start_found = (pc->frame_start_found + 1) & 3;
2210 i = avpriv_mpv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1;
2211 if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) {
2213 pc->frame_start_found = 4;
2215 if (state == SEQ_END_CODE) {
2216 pc->frame_start_found = 0;
2220 if (pc->frame_start_found == 2 && state == SEQ_START_CODE)
2221 pc->frame_start_found = 0;
2222 if (pc->frame_start_found < 4 && state == EXT_START_CODE)
2223 pc->frame_start_found++;
2224 if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) {
2225 if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) {
2226 pc->frame_start_found = 0;
2231 if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) {
2232 ff_fetch_timestamp(s, i - 3, 1);
2237 return END_NOT_FOUND;
2240 static int decode_chunks(AVCodecContext *avctx,
2241 AVFrame *picture, int *data_size,
2242 const uint8_t *buf, int buf_size);
2244 /* handle buffering and image synchronisation */
2245 static int mpeg_decode_frame(AVCodecContext *avctx,
2246 void *data, int *data_size,
2249 const uint8_t *buf = avpkt->data;
2250 int buf_size = avpkt->size;
2251 Mpeg1Context *s = avctx->priv_data;
2252 AVFrame *picture = data;
2253 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2254 av_dlog(avctx, "fill_buffer\n");
2256 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2257 /* special case for last picture */
2258 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2259 *picture = *(AVFrame*)s2->next_picture_ptr;
2260 s2->next_picture_ptr = NULL;
2262 *data_size = sizeof(AVFrame);
2267 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2268 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2270 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2274 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2275 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2276 || s2->codec_tag == AV_RL32("BW10")
2278 vcr2_init_sequence(avctx);
2282 if (avctx->extradata && !avctx->frame_number) {
2283 int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2284 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2288 return decode_chunks(avctx, picture, data_size, buf, buf_size);
2291 static int decode_chunks(AVCodecContext *avctx,
2292 AVFrame *picture, int *data_size,
2293 const uint8_t *buf, int buf_size)
2295 Mpeg1Context *s = avctx->priv_data;
2296 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2297 const uint8_t *buf_ptr = buf;
2298 const uint8_t *buf_end = buf + buf_size;
2299 int ret, input_size;
2303 /* find next start code */
2304 uint32_t start_code = -1;
2305 buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
2306 if (start_code > 0x1ff) {
2307 if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
2308 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2310 av_assert0(avctx->thread_count > 1);
2312 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2313 for (i = 0; i < s->slice_count; i++)
2314 s2->error_count += s2->thread_context[i]->error_count;
2317 if (CONFIG_VDPAU && uses_vdpau(avctx))
2318 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2321 if (slice_end(avctx, picture)) {
2322 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2323 *data_size = sizeof(AVPicture);
2327 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2330 input_size = buf_end - buf_ptr;
2332 if (avctx->debug & FF_DEBUG_STARTCODE) {
2333 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2336 /* prepare data for next start code */
2337 switch (start_code) {
2338 case SEQ_START_CODE:
2339 if (last_code == 0) {
2340 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2341 if(buf != avctx->extradata)
2344 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2345 if (avctx->err_recognition & AV_EF_EXPLODE)
2346 return AVERROR_INVALIDDATA;
2350 case PICTURE_START_CODE:
2352 s2->intra_dc_precision= 3;
2353 s2->intra_matrix[0]= 1;
2355 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
2358 avctx->execute(avctx, slice_decode_thread,
2359 s2->thread_context, NULL,
2360 s->slice_count, sizeof(void*));
2361 for (i = 0; i < s->slice_count; i++)
2362 s2->error_count += s2->thread_context[i]->error_count;
2365 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2366 ret = mpeg_decode_postinit(avctx);
2368 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2372 /* we have a complete image: we try to decompress it */
2373 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2375 s2->first_slice = 1;
2376 last_code = PICTURE_START_CODE;
2378 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2379 if (avctx->err_recognition & AV_EF_EXPLODE)
2380 return AVERROR_INVALIDDATA;
2383 case EXT_START_CODE:
2384 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2386 switch (get_bits(&s2->gb, 4)) {
2388 if (last_code == 0) {
2389 mpeg_decode_sequence_extension(s);
2391 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2392 if (avctx->err_recognition & AV_EF_EXPLODE)
2393 return AVERROR_INVALIDDATA;
2397 mpeg_decode_sequence_display_extension(s);
2400 mpeg_decode_quant_matrix_extension(s2);
2403 mpeg_decode_picture_display_extension(s);
2406 if (last_code == PICTURE_START_CODE) {
2407 mpeg_decode_picture_coding_extension(s);
2409 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2410 if (avctx->err_recognition & AV_EF_EXPLODE)
2411 return AVERROR_INVALIDDATA;
2416 case USER_START_CODE:
2417 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2419 case GOP_START_CODE:
2420 if (last_code == 0) {
2422 mpeg_decode_gop(avctx, buf_ptr, input_size);
2425 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2426 if (avctx->err_recognition & AV_EF_EXPLODE)
2427 return AVERROR_INVALIDDATA;
2431 if (start_code >= SLICE_MIN_START_CODE &&
2432 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2433 const int field_pic = s2->picture_structure != PICT_FRAME;
2434 int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
2435 last_code = SLICE_MIN_START_CODE;
2437 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2440 if (mb_y >= s2->mb_height) {
2441 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2445 if (s2->last_picture_ptr == NULL) {
2446 /* Skip B-frames if we do not have reference frames and gop is not closed */
2447 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2448 if (!s2->closed_gop)
2452 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2454 if (s2->next_picture_ptr == NULL) {
2455 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2456 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break;
2458 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2459 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2460 avctx->skip_frame >= AVDISCARD_ALL)
2463 if (!s->mpeg_enc_ctx_allocated)
2466 if (s2->codec_id == CODEC_ID_MPEG2VIDEO) {
2467 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2471 if (!s2->pict_type) {
2472 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2473 if (avctx->err_recognition & AV_EF_EXPLODE)
2474 return AVERROR_INVALIDDATA;
2478 if (s2->first_slice) {
2479 s2->first_slice = 0;
2480 if (mpeg_field_start(s2, buf, buf_size) < 0)
2483 if (!s2->current_picture_ptr) {
2484 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2485 return AVERROR_INVALIDDATA;
2488 if (uses_vdpau(avctx)) {
2493 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2494 int threshold = (s2->mb_height * s->slice_count +
2495 s2->slice_context_count / 2) /
2496 s2->slice_context_count;
2497 av_assert0(avctx->thread_count > 1);
2498 if (threshold <= mb_y) {
2499 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2501 thread_context->start_mb_y = mb_y;
2502 thread_context->end_mb_y = s2->mb_height;
2503 if (s->slice_count) {
2504 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2505 ff_update_duplicate_context(thread_context, s2);
2507 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2510 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2512 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2516 if (avctx->err_recognition & AV_EF_EXPLODE)
2518 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2519 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);
2521 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);
2530 static void flush(AVCodecContext *avctx)
2532 Mpeg1Context *s = avctx->priv_data;
2536 ff_mpeg_flush(avctx);
2539 static int mpeg_decode_end(AVCodecContext *avctx)
2541 Mpeg1Context *s = avctx->priv_data;
2543 if (s->mpeg_enc_ctx_allocated)
2544 ff_MPV_common_end(&s->mpeg_enc_ctx);
2548 static const AVProfile mpeg2_video_profiles[] = {
2549 { FF_PROFILE_MPEG2_422, "4:2:2" },
2550 { FF_PROFILE_MPEG2_HIGH, "High" },
2551 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2552 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2553 { FF_PROFILE_MPEG2_MAIN, "Main" },
2554 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2555 { FF_PROFILE_RESERVED, "Reserved" },
2556 { FF_PROFILE_RESERVED, "Reserved" },
2557 { FF_PROFILE_UNKNOWN },
2561 AVCodec ff_mpeg1video_decoder = {
2562 .name = "mpeg1video",
2563 .type = AVMEDIA_TYPE_VIDEO,
2564 .id = CODEC_ID_MPEG1VIDEO,
2565 .priv_data_size = sizeof(Mpeg1Context),
2566 .init = mpeg_decode_init,
2567 .close = mpeg_decode_end,
2568 .decode = mpeg_decode_frame,
2569 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2572 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2573 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2576 AVCodec ff_mpeg2video_decoder = {
2577 .name = "mpeg2video",
2578 .type = AVMEDIA_TYPE_VIDEO,
2579 .id = CODEC_ID_MPEG2VIDEO,
2580 .priv_data_size = sizeof(Mpeg1Context),
2581 .init = mpeg_decode_init,
2582 .close = mpeg_decode_end,
2583 .decode = mpeg_decode_frame,
2584 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2587 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2588 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2592 AVCodec ff_mpegvideo_decoder = {
2593 .name = "mpegvideo",
2594 .type = AVMEDIA_TYPE_VIDEO,
2595 .id = CODEC_ID_MPEG2VIDEO,
2596 .priv_data_size = sizeof(Mpeg1Context),
2597 .init = mpeg_decode_init,
2598 .close = mpeg_decode_end,
2599 .decode = mpeg_decode_frame,
2600 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2603 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2606 #if CONFIG_MPEG_XVMC_DECODER
2607 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2609 if (avctx->active_thread_type & FF_THREAD_SLICE)
2611 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2613 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2614 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2616 mpeg_decode_init(avctx);
2618 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2619 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2624 AVCodec ff_mpeg_xvmc_decoder = {
2625 .name = "mpegvideo_xvmc",
2626 .type = AVMEDIA_TYPE_VIDEO,
2627 .id = CODEC_ID_MPEG2VIDEO_XVMC,
2628 .priv_data_size = sizeof(Mpeg1Context),
2629 .init = mpeg_mc_decode_init,
2630 .close = mpeg_decode_end,
2631 .decode = mpeg_decode_frame,
2632 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2634 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2639 #if CONFIG_MPEG_VDPAU_DECODER
2640 AVCodec ff_mpeg_vdpau_decoder = {
2641 .name = "mpegvideo_vdpau",
2642 .type = AVMEDIA_TYPE_VIDEO,
2643 .id = CODEC_ID_MPEG2VIDEO,
2644 .priv_data_size = sizeof(Mpeg1Context),
2645 .init = mpeg_decode_init,
2646 .close = mpeg_decode_end,
2647 .decode = mpeg_decode_frame,
2648 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2650 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2654 #if CONFIG_MPEG1_VDPAU_DECODER
2655 AVCodec ff_mpeg1_vdpau_decoder = {
2656 .name = "mpeg1video_vdpau",
2657 .type = AVMEDIA_TYPE_VIDEO,
2658 .id = CODEC_ID_MPEG1VIDEO,
2659 .priv_data_size = sizeof(Mpeg1Context),
2660 .init = mpeg_decode_init,
2661 .close = mpeg_decode_end,
2662 .decode = mpeg_decode_frame,
2663 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2665 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),