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"
38 #include "mpeg12data.h"
39 #include "mpeg12decdata.h"
40 #include "bytestream.h"
41 #include "vdpau_internal.h"
42 #include "xvmc_internal.h"
50 #define MBINCR_VLC_BITS 9
51 #define MB_PAT_VLC_BITS 9
52 #define MB_PTYPE_VLC_BITS 6
53 #define MB_BTYPE_VLC_BITS 6
57 /* as H.263, but only 17 codes */
58 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
60 int code, sign, val, shift;
62 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
70 sign = get_bits1(&s->gb);
74 val = (val - 1) << shift;
75 val |= get_bits(&s->gb, shift);
83 return sign_extend(val, 5 + shift);
86 static inline int mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
88 int level, dc, diff, i, j, run;
90 RLTable *rl = &ff_rl_mpeg1;
91 uint8_t * const scantable = s->intra_scantable.permutated;
92 const uint16_t *quant_matrix = s->intra_matrix;
93 const int qscale = s->qscale;
96 component = (n <= 3 ? 0 : n - 4 + 1);
97 diff = decode_dc(&s->gb, component);
100 dc = s->last_dc[component];
102 s->last_dc[component] = dc;
103 block[0] = dc * quant_matrix[0];
104 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
107 OPEN_READER(re, &s->gb);
108 /* now quantify & encode AC coefficients */
110 UPDATE_CACHE(re, &s->gb);
111 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
115 } else if (level != 0) {
118 level = (level * qscale * quant_matrix[j]) >> 4;
119 level = (level - 1) | 1;
120 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
121 LAST_SKIP_BITS(re, &s->gb, 1);
124 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
125 UPDATE_CACHE(re, &s->gb);
126 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
128 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
129 } else if (level == 0) {
130 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
136 level = (level * qscale * quant_matrix[j]) >> 4;
137 level = (level - 1) | 1;
140 level = (level * qscale * quant_matrix[j]) >> 4;
141 level = (level - 1) | 1;
145 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
151 CLOSE_READER(re, &s->gb);
153 s->block_last_index[n] = i;
157 int ff_mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
159 return mpeg1_decode_block_intra(s, block, n);
162 static inline int mpeg1_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
164 int level, i, j, run;
165 RLTable *rl = &ff_rl_mpeg1;
166 uint8_t * const scantable = s->intra_scantable.permutated;
167 const uint16_t *quant_matrix = s->inter_matrix;
168 const int qscale = s->qscale;
171 OPEN_READER(re, &s->gb);
173 // special case for first coefficient, no need to add second VLC table
174 UPDATE_CACHE(re, &s->gb);
175 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
176 level = (3 * qscale * quant_matrix[0]) >> 5;
177 level = (level - 1) | 1;
178 if (GET_CACHE(re, &s->gb) & 0x40000000)
182 SKIP_BITS(re, &s->gb, 2);
183 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
186 /* now quantify & encode AC coefficients */
188 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
193 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
194 level = (level - 1) | 1;
195 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
196 SKIP_BITS(re, &s->gb, 1);
199 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
200 UPDATE_CACHE(re, &s->gb);
201 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
203 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
204 } else if (level == 0) {
205 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
211 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
212 level = (level - 1) | 1;
215 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
216 level = (level - 1) | 1;
220 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
225 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
227 UPDATE_CACHE(re, &s->gb);
230 LAST_SKIP_BITS(re, &s->gb, 2);
231 CLOSE_READER(re, &s->gb);
233 s->block_last_index[n] = i;
237 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
239 int level, i, j, run;
240 RLTable *rl = &ff_rl_mpeg1;
241 uint8_t * const scantable = s->intra_scantable.permutated;
242 const int qscale = s->qscale;
245 OPEN_READER(re, &s->gb);
247 // special case for first coefficient, no need to add second VLC table
248 UPDATE_CACHE(re, &s->gb);
249 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
250 level = (3 * qscale) >> 1;
251 level = (level - 1) | 1;
252 if (GET_CACHE(re, &s->gb) & 0x40000000)
256 SKIP_BITS(re, &s->gb, 2);
257 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
261 /* now quantify & encode AC coefficients */
263 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
268 level = ((level * 2 + 1) * qscale) >> 1;
269 level = (level - 1) | 1;
270 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
271 SKIP_BITS(re, &s->gb, 1);
274 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
275 UPDATE_CACHE(re, &s->gb);
276 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
278 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
279 } else if (level == 0) {
280 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
286 level = ((level * 2 + 1) * qscale) >> 1;
287 level = (level - 1) | 1;
290 level = ((level * 2 + 1) * qscale) >> 1;
291 level = (level - 1) | 1;
296 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
298 UPDATE_CACHE(re, &s->gb);
301 LAST_SKIP_BITS(re, &s->gb, 2);
302 CLOSE_READER(re, &s->gb);
304 s->block_last_index[n] = i;
309 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n)
311 int level, i, j, run;
312 RLTable *rl = &ff_rl_mpeg1;
313 uint8_t * const scantable = s->intra_scantable.permutated;
314 const uint16_t *quant_matrix;
315 const int qscale = s->qscale;
321 OPEN_READER(re, &s->gb);
324 quant_matrix = s->inter_matrix;
326 quant_matrix = s->chroma_inter_matrix;
328 // special case for first coefficient, no need to add second VLC table
329 UPDATE_CACHE(re, &s->gb);
330 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
331 level= (3 * qscale * quant_matrix[0]) >> 5;
332 if (GET_CACHE(re, &s->gb) & 0x40000000)
337 SKIP_BITS(re, &s->gb, 2);
338 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
342 /* now quantify & encode AC coefficients */
344 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
349 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
350 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
351 SKIP_BITS(re, &s->gb, 1);
354 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
355 UPDATE_CACHE(re, &s->gb);
356 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
361 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
364 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
368 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
374 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
376 UPDATE_CACHE(re, &s->gb);
379 LAST_SKIP_BITS(re, &s->gb, 2);
380 CLOSE_READER(re, &s->gb);
382 block[63] ^= (mismatch & 1);
384 s->block_last_index[n] = i;
388 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
389 DCTELEM *block, int n)
391 int level, i, j, run;
392 RLTable *rl = &ff_rl_mpeg1;
393 uint8_t * const scantable = s->intra_scantable.permutated;
394 const int qscale = s->qscale;
395 OPEN_READER(re, &s->gb);
398 // special case for first coefficient, no need to add second VLC table
399 UPDATE_CACHE(re, &s->gb);
400 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
401 level = (3 * qscale) >> 1;
402 if (GET_CACHE(re, &s->gb) & 0x40000000)
406 SKIP_BITS(re, &s->gb, 2);
407 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
411 /* now quantify & encode AC coefficients */
413 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
418 level = ((level * 2 + 1) * qscale) >> 1;
419 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
420 SKIP_BITS(re, &s->gb, 1);
423 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
424 UPDATE_CACHE(re, &s->gb);
425 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
430 level = ((-level * 2 + 1) * qscale) >> 1;
433 level = ((level * 2 + 1) * qscale) >> 1;
438 if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
440 UPDATE_CACHE(re, &s->gb);
443 LAST_SKIP_BITS(re, &s->gb, 2);
444 CLOSE_READER(re, &s->gb);
445 s->block_last_index[n] = i;
450 static inline int mpeg2_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
452 int level, dc, diff, i, j, run;
455 uint8_t * const scantable = s->intra_scantable.permutated;
456 const uint16_t *quant_matrix;
457 const int qscale = s->qscale;
462 quant_matrix = s->intra_matrix;
465 quant_matrix = s->chroma_intra_matrix;
466 component = (n & 1) + 1;
468 diff = decode_dc(&s->gb, component);
471 dc = s->last_dc[component];
473 s->last_dc[component] = dc;
474 block[0] = dc << (3 - s->intra_dc_precision);
475 av_dlog(s->avctx, "dc=%d\n", block[0]);
476 mismatch = block[0] ^ 1;
478 if (s->intra_vlc_format)
484 OPEN_READER(re, &s->gb);
485 /* now quantify & encode AC coefficients */
487 UPDATE_CACHE(re, &s->gb);
488 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
492 } else if (level != 0) {
495 level = (level * qscale * quant_matrix[j]) >> 4;
496 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
497 LAST_SKIP_BITS(re, &s->gb, 1);
500 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
501 UPDATE_CACHE(re, &s->gb);
502 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
506 level = (-level * qscale * quant_matrix[j]) >> 4;
509 level = (level * qscale * quant_matrix[j]) >> 4;
513 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
520 CLOSE_READER(re, &s->gb);
522 block[63] ^= mismatch & 1;
524 s->block_last_index[n] = i;
528 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
530 int level, dc, diff, j, run;
533 uint8_t * scantable = s->intra_scantable.permutated;
534 const uint16_t *quant_matrix;
535 const int qscale = s->qscale;
539 quant_matrix = s->intra_matrix;
542 quant_matrix = s->chroma_intra_matrix;
543 component = (n & 1) + 1;
545 diff = decode_dc(&s->gb, component);
548 dc = s->last_dc[component];
550 s->last_dc[component] = dc;
551 block[0] = dc << (3 - s->intra_dc_precision);
552 if (s->intra_vlc_format)
558 OPEN_READER(re, &s->gb);
559 /* now quantify & encode AC coefficients */
561 UPDATE_CACHE(re, &s->gb);
562 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
566 } else if (level != 0) {
569 level = (level * qscale * quant_matrix[j]) >> 4;
570 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
571 LAST_SKIP_BITS(re, &s->gb, 1);
574 run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
575 UPDATE_CACHE(re, &s->gb);
576 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
580 level = (-level * qscale * quant_matrix[j]) >> 4;
583 level = (level * qscale * quant_matrix[j]) >> 4;
589 CLOSE_READER(re, &s->gb);
592 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
596 uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
598 #define INIT_2D_VLC_RL(rl, static_size)\
600 static RL_VLC_ELEM rl_vlc_table[static_size];\
601 INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
602 &rl.table_vlc[0][1], 4, 2,\
603 &rl.table_vlc[0][0], 4, 2, static_size);\
605 rl.rl_vlc[0] = rl_vlc_table;\
606 init_2d_vlc_rl(&rl);\
609 static void init_2d_vlc_rl(RLTable *rl)
613 for (i = 0; i < rl->vlc.table_size; i++) {
614 int code = rl->vlc.table[i][0];
615 int len = rl->vlc.table[i][1];
618 if (len == 0) { // illegal code
621 } else if (len<0) { //more bits needed
625 if (code == rl->n) { //esc
628 } else if (code == rl->n+1) { //eob
632 run = rl->table_run [code] + 1;
633 level = rl->table_level[code];
636 rl->rl_vlc[0][i].len = len;
637 rl->rl_vlc[0][i].level = level;
638 rl->rl_vlc[0][i].run = run;
642 void ff_mpeg12_common_init(MpegEncContext *s)
645 s->y_dc_scale_table =
646 s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision];
650 void ff_mpeg1_clean_buffers(MpegEncContext *s)
652 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
653 s->last_dc[1] = s->last_dc[0];
654 s->last_dc[2] = s->last_dc[0];
655 memset(s->last_mv, 0, sizeof(s->last_mv));
659 /******************************************/
663 VLC ff_dc_chroma_vlc;
665 static VLC mbincr_vlc;
666 static VLC mb_ptype_vlc;
667 static VLC mb_btype_vlc;
668 static VLC mb_pat_vlc;
670 av_cold void ff_mpeg12_init_vlcs(void)
677 INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
678 ff_mpeg12_vlc_dc_lum_bits, 1, 1,
679 ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
680 INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
681 ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
682 ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
683 INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
684 &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
685 &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
686 INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
687 &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
688 &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
689 INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
690 &ff_mpeg12_mbPatTable[0][1], 2, 1,
691 &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
693 INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
694 &table_mb_ptype[0][1], 2, 1,
695 &table_mb_ptype[0][0], 2, 1, 64);
696 INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
697 &table_mb_btype[0][1], 2, 1,
698 &table_mb_btype[0][0], 2, 1, 64);
699 init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
700 init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
702 INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
703 INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
707 static inline int get_dmv(MpegEncContext *s)
709 if (get_bits1(&s->gb))
710 return 1 - (get_bits1(&s->gb) << 1);
715 static inline int get_qscale(MpegEncContext *s)
717 int qscale = get_bits(&s->gb, 5);
718 if (s->q_scale_type) {
719 return non_linear_qscale[qscale];
725 static void exchange_uv(MpegEncContext *s)
730 s->pblocks[4] = s->pblocks[5];
734 /* motion type (for MPEG-2) */
740 static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
742 int i, j, k, cbp, val, mb_type, motion_type;
743 const int mb_block_count = 4 + (1 << s->chroma_format);
745 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
747 assert(s->mb_skipped == 0);
749 if (s->mb_skip_run-- != 0) {
750 if (s->pict_type == AV_PICTURE_TYPE_P) {
752 s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
757 mb_type = s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
759 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
760 if (IS_INTRA(mb_type))
762 s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] =
763 mb_type | MB_TYPE_SKIP;
764 // assert(s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8));
766 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
773 switch (s->pict_type) {
775 case AV_PICTURE_TYPE_I:
776 if (get_bits1(&s->gb) == 0) {
777 if (get_bits1(&s->gb) == 0) {
778 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
781 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
783 mb_type = MB_TYPE_INTRA;
786 case AV_PICTURE_TYPE_P:
787 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
789 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
792 mb_type = ptype2mb_type[mb_type];
794 case AV_PICTURE_TYPE_B:
795 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
797 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
800 mb_type = btype2mb_type[mb_type];
803 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
804 // motion_type = 0; /* avoid warning */
805 if (IS_INTRA(mb_type)) {
806 s->dsp.clear_blocks(s->block[0]);
808 if (!s->chroma_y_shift) {
809 s->dsp.clear_blocks(s->block[6]);
812 /* compute DCT type */
813 if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var?
814 !s->frame_pred_frame_dct) {
815 s->interlaced_dct = get_bits1(&s->gb);
818 if (IS_QUANT(mb_type))
819 s->qscale = get_qscale(s);
821 if (s->concealment_motion_vectors) {
822 /* just parse them */
823 if (s->picture_structure != PICT_FRAME)
824 skip_bits1(&s->gb); /* field select */
826 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
827 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
828 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
829 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
831 skip_bits1(&s->gb); /* marker */
833 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
835 // if 1, we memcpy blocks in xvmcvideo
836 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
837 ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks
843 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
844 if (s->flags2 & CODEC_FLAG2_FAST) {
845 for (i = 0; i < 6; i++) {
846 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
849 for (i = 0; i < mb_block_count; i++) {
850 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
855 for (i = 0; i < 6; i++) {
856 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
861 if (mb_type & MB_TYPE_ZERO_MV) {
862 assert(mb_type & MB_TYPE_CBP);
864 s->mv_dir = MV_DIR_FORWARD;
865 if (s->picture_structure == PICT_FRAME) {
866 if (!s->frame_pred_frame_dct)
867 s->interlaced_dct = get_bits1(&s->gb);
868 s->mv_type = MV_TYPE_16X16;
870 s->mv_type = MV_TYPE_FIELD;
871 mb_type |= MB_TYPE_INTERLACED;
872 s->field_select[0][0] = s->picture_structure - 1;
875 if (IS_QUANT(mb_type))
876 s->qscale = get_qscale(s);
878 s->last_mv[0][0][0] = 0;
879 s->last_mv[0][0][1] = 0;
880 s->last_mv[0][1][0] = 0;
881 s->last_mv[0][1][1] = 0;
885 assert(mb_type & MB_TYPE_L0L1);
886 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
887 /* get additional motion vector type */
888 if (s->frame_pred_frame_dct)
889 motion_type = MT_FRAME;
891 motion_type = get_bits(&s->gb, 2);
892 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
893 s->interlaced_dct = get_bits1(&s->gb);
896 if (IS_QUANT(mb_type))
897 s->qscale = get_qscale(s);
900 s->mv_dir = (mb_type >> 13) & 3;
901 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
902 switch (motion_type) {
903 case MT_FRAME: /* or MT_16X8 */
904 if (s->picture_structure == PICT_FRAME) {
905 mb_type |= MB_TYPE_16x16;
906 s->mv_type = MV_TYPE_16X16;
907 for (i = 0; i < 2; i++) {
908 if (USES_LIST(mb_type, i)) {
910 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
911 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
912 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
913 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
914 /* full_pel: only for MPEG-1 */
915 if (s->full_pel[i]) {
916 s->mv[i][0][0] <<= 1;
917 s->mv[i][0][1] <<= 1;
922 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
923 s->mv_type = MV_TYPE_16X8;
924 for (i = 0; i < 2; i++) {
925 if (USES_LIST(mb_type, i)) {
927 for (j = 0; j < 2; j++) {
928 s->field_select[i][j] = get_bits1(&s->gb);
929 for (k = 0; k < 2; k++) {
930 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
931 s->last_mv[i][j][k]);
932 s->last_mv[i][j][k] = val;
933 s->mv[i][j][k] = val;
941 s->mv_type = MV_TYPE_FIELD;
942 if (s->picture_structure == PICT_FRAME) {
943 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
944 for (i = 0; i < 2; i++) {
945 if (USES_LIST(mb_type, i)) {
946 for (j = 0; j < 2; j++) {
947 s->field_select[i][j] = get_bits1(&s->gb);
948 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
949 s->last_mv[i][j][0]);
950 s->last_mv[i][j][0] = val;
951 s->mv[i][j][0] = val;
952 av_dlog(s->avctx, "fmx=%d\n", val);
953 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
954 s->last_mv[i][j][1] >> 1);
955 s->last_mv[i][j][1] = val << 1;
956 s->mv[i][j][1] = val;
957 av_dlog(s->avctx, "fmy=%d\n", val);
962 av_assert0(!s->progressive_sequence);
963 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
964 for (i = 0; i < 2; i++) {
965 if (USES_LIST(mb_type, i)) {
966 s->field_select[i][0] = get_bits1(&s->gb);
967 for (k = 0; k < 2; k++) {
968 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
969 s->last_mv[i][0][k]);
970 s->last_mv[i][0][k] = val;
971 s->last_mv[i][1][k] = val;
972 s->mv[i][0][k] = val;
979 if(s->progressive_sequence){
980 av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
983 s->mv_type = MV_TYPE_DMV;
984 for (i = 0; i < 2; i++) {
985 if (USES_LIST(mb_type, i)) {
986 int dmx, dmy, mx, my, m;
987 const int my_shift = s->picture_structure == PICT_FRAME;
989 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
990 s->last_mv[i][0][0]);
991 s->last_mv[i][0][0] = mx;
992 s->last_mv[i][1][0] = mx;
994 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
995 s->last_mv[i][0][1] >> my_shift);
999 s->last_mv[i][0][1] = my << my_shift;
1000 s->last_mv[i][1][1] = my << my_shift;
1002 s->mv[i][0][0] = mx;
1003 s->mv[i][0][1] = my;
1004 s->mv[i][1][0] = mx; // not used
1005 s->mv[i][1][1] = my; // not used
1007 if (s->picture_structure == PICT_FRAME) {
1008 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1010 // m = 1 + 2 * s->top_field_first;
1011 m = s->top_field_first ? 1 : 3;
1013 /* top -> top pred */
1014 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1015 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1017 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1018 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1020 mb_type |= MB_TYPE_16x16;
1022 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1023 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1024 if (s->picture_structure == PICT_TOP_FIELD)
1033 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1039 if (HAS_CBP(mb_type)) {
1040 s->dsp.clear_blocks(s->block[0]);
1042 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1043 if (mb_block_count > 6) {
1044 cbp <<= mb_block_count - 6;
1045 cbp |= get_bits(&s->gb, mb_block_count - 6);
1046 s->dsp.clear_blocks(s->block[6]);
1049 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1053 //if 1, we memcpy blocks in xvmcvideo
1054 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) {
1055 ff_xvmc_pack_pblocks(s, cbp);
1061 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1062 if (s->flags2 & CODEC_FLAG2_FAST) {
1063 for (i = 0; i < 6; i++) {
1065 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
1067 s->block_last_index[i] = -1;
1072 cbp <<= 12-mb_block_count;
1074 for (i = 0; i < mb_block_count; i++) {
1075 if (cbp & (1 << 11)) {
1076 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
1079 s->block_last_index[i] = -1;
1085 if (s->flags2 & CODEC_FLAG2_FAST) {
1086 for (i = 0; i < 6; i++) {
1088 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
1090 s->block_last_index[i] = -1;
1095 for (i = 0; i < 6; i++) {
1097 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
1100 s->block_last_index[i] = -1;
1107 for (i = 0; i < 12; i++)
1108 s->block_last_index[i] = -1;
1112 s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
1117 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1119 Mpeg1Context *s = avctx->priv_data;
1120 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1123 /* we need some permutation to store matrices,
1124 * until MPV_common_init() sets the real permutation. */
1125 for (i = 0; i < 64; i++)
1126 s2->dsp.idct_permutation[i]=i;
1128 MPV_decode_defaults(s2);
1130 s->mpeg_enc_ctx.avctx = avctx;
1131 s->mpeg_enc_ctx.flags = avctx->flags;
1132 s->mpeg_enc_ctx.flags2 = avctx->flags2;
1133 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1134 ff_mpeg12_init_vlcs();
1136 s->mpeg_enc_ctx_allocated = 0;
1137 s->mpeg_enc_ctx.picture_number = 0;
1138 s->repeat_field = 0;
1139 s->mpeg_enc_ctx.codec_id = avctx->codec->id;
1140 avctx->color_range = AVCOL_RANGE_MPEG;
1141 if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
1142 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1144 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1148 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1150 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1151 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1154 if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1157 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1158 if (err) return err;
1160 if (!ctx->mpeg_enc_ctx_allocated)
1161 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1163 if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1164 s->picture_number++;
1169 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1170 const uint8_t *new_perm)
1172 uint16_t temp_matrix[64];
1175 memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t));
1177 for (i = 0; i < 64; i++) {
1178 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1182 static const enum PixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1183 #if CONFIG_MPEG_XVMC_DECODER
1184 PIX_FMT_XVMC_MPEG2_IDCT,
1185 PIX_FMT_XVMC_MPEG2_MC,
1187 #if CONFIG_MPEG1_VDPAU_HWACCEL
1188 PIX_FMT_VDPAU_MPEG1,
1194 static const enum PixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1195 #if CONFIG_MPEG_XVMC_DECODER
1196 PIX_FMT_XVMC_MPEG2_IDCT,
1197 PIX_FMT_XVMC_MPEG2_MC,
1199 #if CONFIG_MPEG2_VDPAU_HWACCEL
1200 PIX_FMT_VDPAU_MPEG2,
1202 #if CONFIG_MPEG2_DXVA2_HWACCEL
1205 #if CONFIG_MPEG2_VAAPI_HWACCEL
1212 static inline int uses_vdpau(AVCodecContext *avctx) {
1213 return avctx->pix_fmt == PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == PIX_FMT_VDPAU_MPEG2;
1216 static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
1218 Mpeg1Context *s1 = avctx->priv_data;
1219 MpegEncContext *s = &s1->mpeg_enc_ctx;
1221 if(s->chroma_format < 2) {
1222 enum PixelFormat res;
1223 res = avctx->get_format(avctx,
1224 avctx->codec_id == CODEC_ID_MPEG1VIDEO ?
1225 mpeg1_hwaccel_pixfmt_list_420 :
1226 mpeg2_hwaccel_pixfmt_list_420);
1227 if (res != PIX_FMT_XVMC_MPEG2_IDCT && res != PIX_FMT_XVMC_MPEG2_MC) {
1228 avctx->xvmc_acceleration = 0;
1229 } else if (!avctx->xvmc_acceleration) {
1230 avctx->xvmc_acceleration = 2;
1233 } else if(s->chroma_format == 2)
1234 return PIX_FMT_YUV422P;
1236 return PIX_FMT_YUV444P;
1239 /* Call this function when we know all parameters.
1240 * It may be called in different places for MPEG-1 and MPEG-2. */
1241 static int mpeg_decode_postinit(AVCodecContext *avctx)
1243 Mpeg1Context *s1 = avctx->priv_data;
1244 MpegEncContext *s = &s1->mpeg_enc_ctx;
1245 uint8_t old_permutation[64];
1247 if ((s1->mpeg_enc_ctx_allocated == 0) ||
1248 avctx->coded_width != s->width ||
1249 avctx->coded_height != s->height ||
1250 s1->save_width != s->width ||
1251 s1->save_height != s->height ||
1252 s1->save_aspect_info != s->aspect_ratio_info ||
1253 s1->save_progressive_seq != s->progressive_sequence ||
1257 if (s1->mpeg_enc_ctx_allocated) {
1258 ParseContext pc = s->parse_context;
1259 s->parse_context.buffer = 0;
1261 s->parse_context = pc;
1264 if ((s->width == 0) || (s->height == 0))
1267 avcodec_set_dimensions(avctx, s->width, s->height);
1268 avctx->bit_rate = s->bit_rate;
1269 s1->save_aspect_info = s->aspect_ratio_info;
1270 s1->save_width = s->width;
1271 s1->save_height = s->height;
1272 s1->save_progressive_seq = s->progressive_sequence;
1274 /* low_delay may be forced, in this case we will have B-frames
1275 * that behave like P-frames. */
1276 avctx->has_b_frames = !s->low_delay;
1278 assert((avctx->sub_id == 1) == (avctx->codec_id == CODEC_ID_MPEG1VIDEO));
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 (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)))
1371 s->mpeg_f_code[0][0] = f_code;
1372 s->mpeg_f_code[0][1] = f_code;
1374 if (s->pict_type == AV_PICTURE_TYPE_B) {
1375 s->full_pel[1] = get_bits1(&s->gb);
1376 f_code = get_bits(&s->gb, 3);
1377 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1379 s->mpeg_f_code[1][0] = f_code;
1380 s->mpeg_f_code[1][1] = f_code;
1382 s->current_picture.f.pict_type = s->pict_type;
1383 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1385 if (avctx->debug & FF_DEBUG_PICT_INFO)
1386 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1393 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1395 MpegEncContext *s= &s1->mpeg_enc_ctx;
1396 int horiz_size_ext, vert_size_ext;
1399 skip_bits(&s->gb, 1); /* profile and level esc*/
1400 s->avctx->profile = get_bits(&s->gb, 3);
1401 s->avctx->level = get_bits(&s->gb, 4);
1402 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1403 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1404 horiz_size_ext = get_bits(&s->gb, 2);
1405 vert_size_ext = get_bits(&s->gb, 2);
1406 s->width |= (horiz_size_ext << 12);
1407 s->height |= (vert_size_ext << 12);
1408 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1409 s->bit_rate += (bit_rate_ext << 18) * 400;
1410 skip_bits1(&s->gb); /* marker */
1411 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1413 s->low_delay = get_bits1(&s->gb);
1414 if (s->flags & CODEC_FLAG_LOW_DELAY)
1417 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1418 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1420 av_dlog(s->avctx, "sequence extension\n");
1421 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
1422 s->avctx->sub_id = 2; /* indicates MPEG-2 found */
1424 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1425 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1426 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1430 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1432 MpegEncContext *s = &s1->mpeg_enc_ctx;
1433 int color_description, w, h;
1435 skip_bits(&s->gb, 3); /* video format */
1436 color_description = get_bits1(&s->gb);
1437 if (color_description) {
1438 s->avctx->color_primaries = get_bits(&s->gb, 8);
1439 s->avctx->color_trc = get_bits(&s->gb, 8);
1440 s->avctx->colorspace = get_bits(&s->gb, 8);
1442 w = get_bits(&s->gb, 14);
1443 skip_bits(&s->gb, 1); //marker
1444 h = get_bits(&s->gb, 14);
1445 // remaining 3 bits are zero padding
1447 s1->pan_scan.width = 16 * w;
1448 s1->pan_scan.height = 16 * h;
1450 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1451 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1454 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1456 MpegEncContext *s = &s1->mpeg_enc_ctx;
1460 if (s->progressive_sequence) {
1461 if (s->repeat_first_field) {
1463 if (s->top_field_first)
1467 if (s->picture_structure == PICT_FRAME) {
1469 if (s->repeat_first_field)
1473 for (i = 0; i < nofco; i++) {
1474 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1475 skip_bits(&s->gb, 1); // marker
1476 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1477 skip_bits(&s->gb, 1); // marker
1480 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1481 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1482 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1483 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1484 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1487 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
1491 for (i = 0; i < 64; i++) {
1492 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1493 int v = get_bits(&s->gb, 8);
1495 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1498 if (intra && i == 0 && v != 8) {
1499 av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1500 v = 8; // needed by pink.mpg / issue1046
1509 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1511 av_dlog(s->avctx, "matrix extension\n");
1513 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1514 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1515 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1516 if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1519 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1521 MpegEncContext *s = &s1->mpeg_enc_ctx;
1523 s->full_pel[0] = s->full_pel[1] = 0;
1524 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1525 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1526 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1527 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1528 if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
1529 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1530 if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1531 if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1532 s->pict_type = AV_PICTURE_TYPE_I;
1534 s->pict_type = AV_PICTURE_TYPE_P;
1536 s->pict_type = AV_PICTURE_TYPE_B;
1537 s->current_picture.f.pict_type = s->pict_type;
1538 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1540 s->intra_dc_precision = get_bits(&s->gb, 2);
1541 s->picture_structure = get_bits(&s->gb, 2);
1542 s->top_field_first = get_bits1(&s->gb);
1543 s->frame_pred_frame_dct = get_bits1(&s->gb);
1544 s->concealment_motion_vectors = get_bits1(&s->gb);
1545 s->q_scale_type = get_bits1(&s->gb);
1546 s->intra_vlc_format = get_bits1(&s->gb);
1547 s->alternate_scan = get_bits1(&s->gb);
1548 s->repeat_first_field = get_bits1(&s->gb);
1549 s->chroma_420_type = get_bits1(&s->gb);
1550 s->progressive_frame = get_bits1(&s->gb);
1552 if (s->progressive_sequence && !s->progressive_frame) {
1553 s->progressive_frame = 1;
1554 av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1557 if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) {
1558 av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1559 s->picture_structure = PICT_FRAME;
1562 if (s->progressive_sequence && !s->frame_pred_frame_dct) {
1563 av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
1566 if (s->picture_structure == PICT_FRAME) {
1568 s->v_edge_pos = 16 * s->mb_height;
1570 s->first_field ^= 1;
1571 s->v_edge_pos = 8 * s->mb_height;
1572 memset(s->mbskip_table, 0, s->mb_stride * s->mb_height);
1575 if (s->alternate_scan) {
1576 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
1577 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
1579 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
1580 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
1583 /* composite display not parsed */
1584 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1585 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1586 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1587 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1588 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1589 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1590 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1591 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1592 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1595 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
1597 AVCodecContext *avctx = s->avctx;
1598 Mpeg1Context *s1 = (Mpeg1Context*)s;
1600 /* start frame decoding */
1601 if (s->first_field || s->picture_structure == PICT_FRAME) {
1602 if (MPV_frame_start(s, avctx) < 0)
1605 ff_er_frame_start(s);
1607 /* first check if we must repeat the frame */
1608 s->current_picture_ptr->f.repeat_pict = 0;
1609 if (s->repeat_first_field) {
1610 if (s->progressive_sequence) {
1611 if (s->top_field_first)
1612 s->current_picture_ptr->f.repeat_pict = 4;
1614 s->current_picture_ptr->f.repeat_pict = 2;
1615 } else if (s->progressive_frame) {
1616 s->current_picture_ptr->f.repeat_pict = 1;
1620 *s->current_picture_ptr->f.pan_scan = s1->pan_scan;
1622 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
1623 ff_thread_finish_setup(avctx);
1624 } else { // second field
1627 if (!s->current_picture_ptr) {
1628 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1632 for (i = 0; i < 4; i++) {
1633 s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i];
1634 if (s->picture_structure == PICT_BOTTOM_FIELD) {
1635 s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i];
1640 if (avctx->hwaccel) {
1641 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1645 // MPV_frame_start will call this function too,
1646 // but we need to call it on every field
1647 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1648 if (ff_xvmc_field_start(s, avctx) < 0)
1654 #define DECODE_SLICE_ERROR -1
1655 #define DECODE_SLICE_OK 0
1659 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1660 * @return DECODE_SLICE_ERROR if the slice is damaged,
1661 * DECODE_SLICE_OK if this slice is OK
1663 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1664 const uint8_t **buf, int buf_size)
1666 AVCodecContext *avctx = s->avctx;
1667 const int lowres = s->avctx->lowres;
1668 const int field_pic = s->picture_structure != PICT_FRAME;
1671 s->resync_mb_y = -1;
1673 assert(mb_y < s->mb_height);
1675 init_get_bits(&s->gb, *buf, buf_size * 8);
1677 ff_mpeg1_clean_buffers(s);
1678 s->interlaced_dct = 0;
1680 s->qscale = get_qscale(s);
1682 if (s->qscale == 0) {
1683 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1687 /* extra slice info */
1688 while (get_bits1(&s->gb) != 0) {
1689 skip_bits(&s->gb, 8);
1694 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1697 while (get_bits_left(&s->gb) > 0) {
1698 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1700 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1707 /* otherwise, stuffing, nothing to do */
1715 if (s->mb_x >= (unsigned)s->mb_width) {
1716 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1720 if (avctx->hwaccel) {
1721 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1722 int start_code = -1;
1723 buf_end = avpriv_mpv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1724 if (buf_end < *buf + buf_size)
1727 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1728 return DECODE_SLICE_ERROR;
1730 return DECODE_SLICE_OK;
1733 s->resync_mb_x = s->mb_x;
1734 s->resync_mb_y = s->mb_y = mb_y;
1736 ff_init_block_index(s);
1738 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1739 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1740 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",
1741 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],
1742 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")),
1743 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1744 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1745 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1750 // If 1, we memcpy blocks in xvmcvideo.
1751 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1752 ff_xvmc_init_block(s); // set s->block
1754 if (mpeg_decode_mb(s, s->block) < 0)
1757 if (s->current_picture.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs
1758 const int wrap = s->b8_stride;
1759 int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1760 int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1761 int motion_x, motion_y, dir, i;
1763 for (i = 0; i < 2; i++) {
1764 for (dir = 0; dir < 2; dir++) {
1765 if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1766 motion_x = motion_y = 0;
1767 } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1768 motion_x = s->mv[dir][0][0];
1769 motion_y = s->mv[dir][0][1];
1770 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1771 motion_x = s->mv[dir][i][0];
1772 motion_y = s->mv[dir][i][1];
1775 s->current_picture.f.motion_val[dir][xy ][0] = motion_x;
1776 s->current_picture.f.motion_val[dir][xy ][1] = motion_y;
1777 s->current_picture.f.motion_val[dir][xy + 1][0] = motion_x;
1778 s->current_picture.f.motion_val[dir][xy + 1][1] = motion_y;
1779 s->current_picture.f.ref_index [dir][b8_xy ] =
1780 s->current_picture.f.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1781 assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1);
1788 s->dest[0] += 16 >> lowres;
1789 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1790 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1792 MPV_decode_mb(s, s->block);
1794 if (++s->mb_x >= s->mb_width) {
1795 const int mb_size = 16 >> s->avctx->lowres;
1797 ff_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size);
1798 MPV_report_decode_progress(s);
1801 s->mb_y += 1 << field_pic;
1803 if (s->mb_y >= s->mb_height) {
1804 int left = get_bits_left(&s->gb);
1805 int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5
1806 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1807 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1809 if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1810 || ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1811 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1817 ff_init_block_index(s);
1820 /* skip mb handling */
1821 if (s->mb_skip_run == -1) {
1822 /* read increment again */
1825 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1827 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1832 s->mb_skip_run += 33;
1833 } else if (code == 35) {
1834 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1835 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1838 goto eos; /* end of slice */
1840 /* otherwise, stuffing, nothing to do */
1842 s->mb_skip_run += code;
1846 if (s->mb_skip_run) {
1848 if (s->pict_type == AV_PICTURE_TYPE_I) {
1849 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1855 for (i = 0; i < 12; i++)
1856 s->block_last_index[i] = -1;
1857 if (s->picture_structure == PICT_FRAME)
1858 s->mv_type = MV_TYPE_16X16;
1860 s->mv_type = MV_TYPE_FIELD;
1861 if (s->pict_type == AV_PICTURE_TYPE_P) {
1862 /* if P type, zero motion vector is implied */
1863 s->mv_dir = MV_DIR_FORWARD;
1864 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1865 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1866 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1867 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1869 /* if B type, reuse previous vectors and directions */
1870 s->mv[0][0][0] = s->last_mv[0][0][0];
1871 s->mv[0][0][1] = s->last_mv[0][0][1];
1872 s->mv[1][0][0] = s->last_mv[1][0][0];
1873 s->mv[1][0][1] = s->last_mv[1][0][1];
1878 eos: // end of slice
1879 *buf += (get_bits_count(&s->gb)-1)/8;
1880 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1884 static int slice_decode_thread(AVCodecContext *c, void *arg)
1886 MpegEncContext *s = *(void**)arg;
1887 const uint8_t *buf = s->gb.buffer;
1888 int mb_y = s->start_mb_y;
1889 const int field_pic = s->picture_structure != PICT_FRAME;
1891 s->error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1894 uint32_t start_code;
1897 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1899 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1900 //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);
1902 if (c->err_recognition & AV_EF_EXPLODE)
1904 if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1905 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);
1907 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);
1910 if (s->mb_y == s->end_mb_y)
1914 buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code);
1915 mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
1916 if (s->picture_structure == PICT_BOTTOM_FIELD)
1918 if (mb_y < 0 || mb_y >= s->end_mb_y)
1924 * Handle slice ends.
1925 * @return 1 if it seems to be the last slice
1927 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1929 Mpeg1Context *s1 = avctx->priv_data;
1930 MpegEncContext *s = &s1->mpeg_enc_ctx;
1932 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1935 if (s->avctx->hwaccel) {
1936 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1937 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1940 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1941 ff_xvmc_field_end(s);
1943 /* end of slice reached */
1944 if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) {
1947 s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_MPEG2;
1953 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1954 *pict = *(AVFrame*)s->current_picture_ptr;
1955 ff_print_debug_info(s, pict);
1957 if (avctx->active_thread_type & FF_THREAD_FRAME)
1958 s->picture_number++;
1959 /* latency of 1 frame for I- and P-frames */
1960 /* XXX: use another variable than picture_number */
1961 if (s->last_picture_ptr != NULL) {
1962 *pict = *(AVFrame*)s->last_picture_ptr;
1963 ff_print_debug_info(s, pict);
1973 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1974 const uint8_t *buf, int buf_size)
1976 Mpeg1Context *s1 = avctx->priv_data;
1977 MpegEncContext *s = &s1->mpeg_enc_ctx;
1981 init_get_bits(&s->gb, buf, buf_size*8);
1983 width = get_bits(&s->gb, 12);
1984 height = get_bits(&s->gb, 12);
1985 if (width <= 0 || height <= 0)
1987 s->aspect_ratio_info = get_bits(&s->gb, 4);
1988 if (s->aspect_ratio_info == 0) {
1989 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1990 if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1993 s->frame_rate_index = get_bits(&s->gb, 4);
1994 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
1996 s->bit_rate = get_bits(&s->gb, 18) * 400;
1997 if (get_bits1(&s->gb) == 0) /* marker */
2002 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
2003 skip_bits(&s->gb, 1);
2006 if (get_bits1(&s->gb)) {
2007 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2009 for (i = 0; i < 64; i++) {
2010 j = s->dsp.idct_permutation[i];
2011 v = ff_mpeg1_default_intra_matrix[i];
2012 s->intra_matrix[j] = v;
2013 s->chroma_intra_matrix[j] = v;
2016 if (get_bits1(&s->gb)) {
2017 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2019 for (i = 0; i < 64; i++) {
2020 int j = s->dsp.idct_permutation[i];
2021 v = ff_mpeg1_default_non_intra_matrix[i];
2022 s->inter_matrix[j] = v;
2023 s->chroma_inter_matrix[j] = v;
2027 if (show_bits(&s->gb, 23) != 0) {
2028 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2032 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2033 s->progressive_sequence = 1;
2034 s->progressive_frame = 1;
2035 s->picture_structure = PICT_FRAME;
2037 s->frame_pred_frame_dct = 1;
2038 s->chroma_format = 1;
2039 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2040 avctx->sub_id = 1; /* indicates MPEG-1 */
2041 s->out_format = FMT_MPEG1;
2042 s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER
2043 if (s->flags & CODEC_FLAG_LOW_DELAY)
2046 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2047 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2048 s->avctx->rc_buffer_size, s->bit_rate);
2053 static int vcr2_init_sequence(AVCodecContext *avctx)
2055 Mpeg1Context *s1 = avctx->priv_data;
2056 MpegEncContext *s = &s1->mpeg_enc_ctx;
2059 /* start new MPEG-1 context decoding */
2060 s->out_format = FMT_MPEG1;
2061 if (s1->mpeg_enc_ctx_allocated) {
2064 s->width = avctx->coded_width;
2065 s->height = avctx->coded_height;
2066 avctx->has_b_frames = 0; // true?
2069 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2070 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2072 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel )
2073 if (avctx->idct_algo == FF_IDCT_AUTO)
2074 avctx->idct_algo = FF_IDCT_SIMPLE;
2076 if (MPV_common_init(s) < 0)
2078 s1->mpeg_enc_ctx_allocated = 1;
2080 for (i = 0; i < 64; i++) {
2081 int j = s->dsp.idct_permutation[i];
2082 v = ff_mpeg1_default_intra_matrix[i];
2083 s->intra_matrix[j] = v;
2084 s->chroma_intra_matrix[j] = v;
2086 v = ff_mpeg1_default_non_intra_matrix[i];
2087 s->inter_matrix[j] = v;
2088 s->chroma_inter_matrix[j] = v;
2091 s->progressive_sequence = 1;
2092 s->progressive_frame = 1;
2093 s->picture_structure = PICT_FRAME;
2095 s->frame_pred_frame_dct = 1;
2096 s->chroma_format = 1;
2097 if (s->codec_tag == AV_RL32("BW10")) {
2098 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG1VIDEO;
2099 avctx->sub_id = 1; /* indicates MPEG-1 */
2101 exchange_uv(s); // common init reset pblocks, so we swap them here
2102 s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB
2103 s->codec_id = s->avctx->codec_id = CODEC_ID_MPEG2VIDEO;
2104 avctx->sub_id = 2; /* indicates MPEG-2 */
2106 s1->save_width = s->width;
2107 s1->save_height = s->height;
2108 s1->save_progressive_seq = s->progressive_sequence;
2113 static void mpeg_decode_user_data(AVCodecContext *avctx,
2114 const uint8_t *p, int buf_size)
2116 Mpeg1Context *s = avctx->priv_data;
2117 const uint8_t *buf_end = p + buf_size;
2122 if(!memcmp(p+i, "\0TMPGEXS\0", 9)){
2126 /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2127 av_log(0,0, "%c", p[i]);
2129 av_log(0,0, "\n");*/
2132 /* we parse the DTG active format information */
2133 if (buf_end - p >= 5 &&
2134 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2142 if (buf_end - p < 1)
2144 avctx->dtg_active_format = p[0] & 0x0f;
2149 static void mpeg_decode_gop(AVCodecContext *avctx,
2150 const uint8_t *buf, int buf_size)
2152 Mpeg1Context *s1 = avctx->priv_data;
2153 MpegEncContext *s = &s1->mpeg_enc_ctx;
2157 init_get_bits(&s->gb, buf, buf_size*8);
2159 tc = avctx->timecode_frame_start = get_bits(&s->gb, 25);
2161 s->closed_gop = get_bits1(&s->gb);
2162 /*broken_link indicate that after editing the
2163 reference frames of the first B-Frames after GOP I-Frame
2164 are missing (open gop)*/
2165 broken_link = get_bits1(&s->gb);
2167 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2168 int time_code_hours = tc>>19 & 0x1f;
2169 int time_code_minutes = tc>>13 & 0x3f;
2170 int time_code_seconds = tc>>6 & 0x3f;
2171 int drop_frame_flag = tc & 1<<24;
2172 int time_code_pictures = tc & 0x3f;
2173 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%02d:%02d:%02d%c%02d) closed_gop=%d broken_link=%d\n",
2174 time_code_hours, time_code_minutes, time_code_seconds,
2175 drop_frame_flag ? ';' : ':',
2176 time_code_pictures, s->closed_gop, broken_link);
2180 * Find the end of the current frame in the bitstream.
2181 * @return the position of the first byte of the next frame, or -1
2183 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2186 uint32_t state = pc->state;
2188 /* EOF considered as end of frame */
2193 0 frame start -> 1/4
2194 1 first_SEQEXT -> 0/2
2195 2 first field start -> 3/0
2196 3 second_SEQEXT -> 2/0
2200 for (i = 0; i < buf_size; i++) {
2201 assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4);
2202 if (pc->frame_start_found & 1) {
2203 if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80)
2204 pc->frame_start_found--;
2205 else if (state == EXT_START_CODE + 2) {
2206 if ((buf[i] & 3) == 3)
2207 pc->frame_start_found = 0;
2209 pc->frame_start_found = (pc->frame_start_found + 1) & 3;
2213 i = avpriv_mpv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1;
2214 if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) {
2216 pc->frame_start_found = 4;
2218 if (state == SEQ_END_CODE) {
2219 pc->frame_start_found = 0;
2223 if (pc->frame_start_found == 2 && state == SEQ_START_CODE)
2224 pc->frame_start_found = 0;
2225 if (pc->frame_start_found < 4 && state == EXT_START_CODE)
2226 pc->frame_start_found++;
2227 if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) {
2228 if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) {
2229 pc->frame_start_found = 0;
2234 if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) {
2235 ff_fetch_timestamp(s, i - 3, 1);
2240 return END_NOT_FOUND;
2243 static int decode_chunks(AVCodecContext *avctx,
2244 AVFrame *picture, int *data_size,
2245 const uint8_t *buf, int buf_size);
2247 /* handle buffering and image synchronisation */
2248 static int mpeg_decode_frame(AVCodecContext *avctx,
2249 void *data, int *data_size,
2252 const uint8_t *buf = avpkt->data;
2253 int buf_size = avpkt->size;
2254 Mpeg1Context *s = avctx->priv_data;
2255 AVFrame *picture = data;
2256 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2257 av_dlog(avctx, "fill_buffer\n");
2259 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2260 /* special case for last picture */
2261 if (s2->low_delay == 0 && s2->next_picture_ptr) {
2262 *picture = *(AVFrame*)s2->next_picture_ptr;
2263 s2->next_picture_ptr = NULL;
2265 *data_size = sizeof(AVFrame);
2270 if (s2->flags & CODEC_FLAG_TRUNCATED) {
2271 int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2273 if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
2277 s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
2278 if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
2279 || s2->codec_tag == AV_RL32("BW10")
2281 vcr2_init_sequence(avctx);
2285 if (avctx->extradata && !avctx->frame_number) {
2286 int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2287 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
2291 return decode_chunks(avctx, picture, data_size, buf, buf_size);
2294 static int decode_chunks(AVCodecContext *avctx,
2295 AVFrame *picture, int *data_size,
2296 const uint8_t *buf, int buf_size)
2298 Mpeg1Context *s = avctx->priv_data;
2299 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2300 const uint8_t *buf_ptr = buf;
2301 const uint8_t *buf_end = buf + buf_size;
2302 int ret, input_size;
2306 /* find next start code */
2307 uint32_t start_code = -1;
2308 buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
2309 if (start_code > 0x1ff) {
2310 if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
2311 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2313 av_assert0(avctx->thread_count > 1);
2315 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2316 for (i = 0; i < s->slice_count; i++)
2317 s2->error_count += s2->thread_context[i]->error_count;
2320 if (CONFIG_VDPAU && uses_vdpau(avctx))
2321 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2324 if (slice_end(avctx, picture)) {
2325 if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2326 *data_size = sizeof(AVPicture);
2330 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2333 input_size = buf_end - buf_ptr;
2335 if (avctx->debug & FF_DEBUG_STARTCODE) {
2336 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2339 /* prepare data for next start code */
2340 switch (start_code) {
2341 case SEQ_START_CODE:
2342 if (last_code == 0) {
2343 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2344 if(buf != avctx->extradata)
2347 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2348 if (avctx->err_recognition & AV_EF_EXPLODE)
2349 return AVERROR_INVALIDDATA;
2353 case PICTURE_START_CODE:
2355 s2->intra_dc_precision= 3;
2356 s2->intra_matrix[0]= 1;
2358 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
2361 avctx->execute(avctx, slice_decode_thread,
2362 s2->thread_context, NULL,
2363 s->slice_count, sizeof(void*));
2364 for (i = 0; i < s->slice_count; i++)
2365 s2->error_count += s2->thread_context[i]->error_count;
2368 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2369 ret = mpeg_decode_postinit(avctx);
2371 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2375 /* we have a complete image: we try to decompress it */
2376 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2378 s2->first_slice = 1;
2379 last_code = PICTURE_START_CODE;
2381 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2382 if (avctx->err_recognition & AV_EF_EXPLODE)
2383 return AVERROR_INVALIDDATA;
2386 case EXT_START_CODE:
2387 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2389 switch (get_bits(&s2->gb, 4)) {
2391 if (last_code == 0) {
2392 mpeg_decode_sequence_extension(s);
2394 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2395 if (avctx->err_recognition & AV_EF_EXPLODE)
2396 return AVERROR_INVALIDDATA;
2400 mpeg_decode_sequence_display_extension(s);
2403 mpeg_decode_quant_matrix_extension(s2);
2406 mpeg_decode_picture_display_extension(s);
2409 if (last_code == PICTURE_START_CODE) {
2410 mpeg_decode_picture_coding_extension(s);
2412 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2413 if (avctx->err_recognition & AV_EF_EXPLODE)
2414 return AVERROR_INVALIDDATA;
2419 case USER_START_CODE:
2420 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2422 case GOP_START_CODE:
2423 if (last_code == 0) {
2425 mpeg_decode_gop(avctx, buf_ptr, input_size);
2428 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2429 if (avctx->err_recognition & AV_EF_EXPLODE)
2430 return AVERROR_INVALIDDATA;
2434 if (start_code >= SLICE_MIN_START_CODE &&
2435 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2436 const int field_pic = s2->picture_structure != PICT_FRAME;
2437 int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic;
2438 last_code = SLICE_MIN_START_CODE;
2440 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2443 if (mb_y >= s2->mb_height) {
2444 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2448 if (s2->last_picture_ptr == NULL) {
2449 /* Skip B-frames if we do not have reference frames and gop is not closed */
2450 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2451 if (!s2->closed_gop)
2455 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL))
2457 if (s2->next_picture_ptr == NULL) {
2458 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2459 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break;
2461 if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) ||
2462 (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) ||
2463 avctx->skip_frame >= AVDISCARD_ALL)
2466 if (!s->mpeg_enc_ctx_allocated)
2469 if (s2->codec_id == CODEC_ID_MPEG2VIDEO) {
2470 if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2474 if (!s2->pict_type) {
2475 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2476 if (avctx->err_recognition & AV_EF_EXPLODE)
2477 return AVERROR_INVALIDDATA;
2481 if (s2->first_slice) {
2482 s2->first_slice = 0;
2483 if (mpeg_field_start(s2, buf, buf_size) < 0)
2486 if (!s2->current_picture_ptr) {
2487 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2488 return AVERROR_INVALIDDATA;
2491 if (uses_vdpau(avctx)) {
2496 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
2497 int threshold = (s2->mb_height * s->slice_count +
2498 s2->slice_context_count / 2) /
2499 s2->slice_context_count;
2500 av_assert0(avctx->thread_count > 1);
2501 if (threshold <= mb_y) {
2502 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2504 thread_context->start_mb_y = mb_y;
2505 thread_context->end_mb_y = s2->mb_height;
2506 if (s->slice_count) {
2507 s2->thread_context[s->slice_count-1]->end_mb_y = mb_y;
2508 ff_update_duplicate_context(thread_context, s2);
2510 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2513 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2515 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2519 if (avctx->err_recognition & AV_EF_EXPLODE)
2521 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2522 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);
2524 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);
2533 static void flush(AVCodecContext *avctx)
2535 Mpeg1Context *s = avctx->priv_data;
2539 ff_mpeg_flush(avctx);
2542 static int mpeg_decode_end(AVCodecContext *avctx)
2544 Mpeg1Context *s = avctx->priv_data;
2546 if (s->mpeg_enc_ctx_allocated)
2547 MPV_common_end(&s->mpeg_enc_ctx);
2551 static const AVProfile mpeg2_video_profiles[] = {
2552 { FF_PROFILE_MPEG2_422, "4:2:2" },
2553 { FF_PROFILE_MPEG2_HIGH, "High" },
2554 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2555 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2556 { FF_PROFILE_MPEG2_MAIN, "Main" },
2557 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2558 { FF_PROFILE_RESERVED, "Reserved" },
2559 { FF_PROFILE_RESERVED, "Reserved" },
2560 { FF_PROFILE_UNKNOWN },
2564 AVCodec ff_mpeg1video_decoder = {
2565 .name = "mpeg1video",
2566 .type = AVMEDIA_TYPE_VIDEO,
2567 .id = CODEC_ID_MPEG1VIDEO,
2568 .priv_data_size = sizeof(Mpeg1Context),
2569 .init = mpeg_decode_init,
2570 .close = mpeg_decode_end,
2571 .decode = mpeg_decode_frame,
2572 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2575 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2576 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2579 AVCodec ff_mpeg2video_decoder = {
2580 .name = "mpeg2video",
2581 .type = AVMEDIA_TYPE_VIDEO,
2582 .id = CODEC_ID_MPEG2VIDEO,
2583 .priv_data_size = sizeof(Mpeg1Context),
2584 .init = mpeg_decode_init,
2585 .close = mpeg_decode_end,
2586 .decode = mpeg_decode_frame,
2587 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2590 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2591 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2595 AVCodec ff_mpegvideo_decoder = {
2596 .name = "mpegvideo",
2597 .type = AVMEDIA_TYPE_VIDEO,
2598 .id = CODEC_ID_MPEG2VIDEO,
2599 .priv_data_size = sizeof(Mpeg1Context),
2600 .init = mpeg_decode_init,
2601 .close = mpeg_decode_end,
2602 .decode = mpeg_decode_frame,
2603 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2606 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2609 #if CONFIG_MPEG_XVMC_DECODER
2610 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx)
2612 if (avctx->active_thread_type & FF_THREAD_SLICE)
2614 if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
2616 if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) {
2617 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2619 mpeg_decode_init(avctx);
2621 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2622 avctx->xvmc_acceleration = 2; // 2 - the blocks are packed!
2627 AVCodec ff_mpeg_xvmc_decoder = {
2628 .name = "mpegvideo_xvmc",
2629 .type = AVMEDIA_TYPE_VIDEO,
2630 .id = CODEC_ID_MPEG2VIDEO_XVMC,
2631 .priv_data_size = sizeof(Mpeg1Context),
2632 .init = mpeg_mc_decode_init,
2633 .close = mpeg_decode_end,
2634 .decode = mpeg_decode_frame,
2635 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2637 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2642 #if CONFIG_MPEG_VDPAU_DECODER
2643 AVCodec ff_mpeg_vdpau_decoder = {
2644 .name = "mpegvideo_vdpau",
2645 .type = AVMEDIA_TYPE_VIDEO,
2646 .id = CODEC_ID_MPEG2VIDEO,
2647 .priv_data_size = sizeof(Mpeg1Context),
2648 .init = mpeg_decode_init,
2649 .close = mpeg_decode_end,
2650 .decode = mpeg_decode_frame,
2651 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2653 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2657 #if CONFIG_MPEG1_VDPAU_DECODER
2658 AVCodec ff_mpeg1_vdpau_decoder = {
2659 .name = "mpeg1video_vdpau",
2660 .type = AVMEDIA_TYPE_VIDEO,
2661 .id = CODEC_ID_MPEG1VIDEO,
2662 .priv_data_size = sizeof(Mpeg1Context),
2663 .init = mpeg_decode_init,
2664 .close = mpeg_decode_end,
2665 .decode = mpeg_decode_frame,
2666 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2668 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),