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
32 #include "mpegvideo.h"
35 #include "mpeg12data.h"
36 #include "mpeg12decdata.h"
37 #include "bytestream.h"
38 #include "vdpau_internal.h"
39 #include "xvmc_internal.h"
47 #define MBINCR_VLC_BITS 9
48 #define MB_PAT_VLC_BITS 9
49 #define MB_PTYPE_VLC_BITS 6
50 #define MB_BTYPE_VLC_BITS 6
52 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
55 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
58 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
59 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
62 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
65 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
66 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
67 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
68 static void exchange_uv(MpegEncContext *s);
70 static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
71 PIX_FMT_XVMC_MPEG2_IDCT,
72 PIX_FMT_XVMC_MPEG2_MC,
75 uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
78 #define INIT_2D_VLC_RL(rl, static_size)\
80 static RL_VLC_ELEM rl_vlc_table[static_size];\
81 INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
82 &rl.table_vlc[0][1], 4, 2,\
83 &rl.table_vlc[0][0], 4, 2, static_size);\
85 rl.rl_vlc[0]= rl_vlc_table;\
89 static void init_2d_vlc_rl(RLTable *rl)
93 for(i=0; i<rl->vlc.table_size; i++){
94 int code= rl->vlc.table[i][0];
95 int len = rl->vlc.table[i][1];
98 if(len==0){ // illegal code
101 }else if(len<0){ //more bits needed
105 if(code==rl->n){ //esc
108 }else if(code==rl->n+1){ //eob
112 run= rl->table_run [code] + 1;
113 level= rl->table_level[code];
116 rl->rl_vlc[0][i].len= len;
117 rl->rl_vlc[0][i].level= level;
118 rl->rl_vlc[0][i].run= run;
122 void ff_mpeg12_common_init(MpegEncContext *s)
126 s->c_dc_scale_table= ff_mpeg2_dc_scale_table[s->intra_dc_precision];
130 void ff_mpeg1_clean_buffers(MpegEncContext *s){
131 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
132 s->last_dc[1] = s->last_dc[0];
133 s->last_dc[2] = s->last_dc[0];
134 memset(s->last_mv, 0, sizeof(s->last_mv));
138 /******************************************/
142 VLC ff_dc_chroma_vlc;
145 static VLC mbincr_vlc;
146 static VLC mb_ptype_vlc;
147 static VLC mb_btype_vlc;
148 static VLC mb_pat_vlc;
150 av_cold void ff_mpeg12_init_vlcs(void)
157 INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
158 ff_mpeg12_vlc_dc_lum_bits, 1, 1,
159 ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
160 INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
161 ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
162 ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
163 INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
164 &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
165 &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
166 INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
167 &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
168 &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
169 INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
170 &ff_mpeg12_mbPatTable[0][1], 2, 1,
171 &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
173 INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
174 &table_mb_ptype[0][1], 2, 1,
175 &table_mb_ptype[0][0], 2, 1, 64);
176 INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
177 &table_mb_btype[0][1], 2, 1,
178 &table_mb_btype[0][0], 2, 1, 64);
179 init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
180 init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
182 INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
183 INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
187 static inline int get_dmv(MpegEncContext *s)
189 if(get_bits1(&s->gb))
190 return 1 - (get_bits1(&s->gb) << 1);
195 static inline int get_qscale(MpegEncContext *s)
197 int qscale = get_bits(&s->gb, 5);
198 if (s->q_scale_type) {
199 return non_linear_qscale[qscale];
205 /* motion type (for MPEG-2) */
211 static int mpeg_decode_mb(MpegEncContext *s,
212 DCTELEM block[12][64])
214 int i, j, k, cbp, val, mb_type, motion_type;
215 const int mb_block_count = 4 + (1<< s->chroma_format);
217 av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
219 assert(s->mb_skipped==0);
221 if (s->mb_skip_run-- != 0) {
222 if (s->pict_type == FF_P_TYPE) {
224 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
229 mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
231 mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
232 if(IS_INTRA(mb_type))
235 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
236 mb_type | MB_TYPE_SKIP;
237 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
239 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
246 switch(s->pict_type) {
249 if (get_bits1(&s->gb) == 0) {
250 if (get_bits1(&s->gb) == 0){
251 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
254 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
256 mb_type = MB_TYPE_INTRA;
260 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
262 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
265 mb_type = ptype2mb_type[ mb_type ];
268 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
270 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
273 mb_type = btype2mb_type[ mb_type ];
276 av_dlog(s->avctx, "mb_type=%x\n", mb_type);
277 // motion_type = 0; /* avoid warning */
278 if (IS_INTRA(mb_type)) {
279 s->dsp.clear_blocks(s->block[0]);
281 if(!s->chroma_y_shift){
282 s->dsp.clear_blocks(s->block[6]);
285 /* compute DCT type */
286 if (s->picture_structure == PICT_FRAME && //FIXME add an interlaced_dct coded var?
287 !s->frame_pred_frame_dct) {
288 s->interlaced_dct = get_bits1(&s->gb);
291 if (IS_QUANT(mb_type))
292 s->qscale = get_qscale(s);
294 if (s->concealment_motion_vectors) {
295 /* just parse them */
296 if (s->picture_structure != PICT_FRAME)
297 skip_bits1(&s->gb); /* field select */
299 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
300 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
301 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
302 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
304 skip_bits1(&s->gb); /* marker */
306 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
308 //if 1, we memcpy blocks in xvmcvideo
309 if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){
310 ff_xvmc_pack_pblocks(s,-1);//inter are always full blocks
316 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
317 if(s->flags2 & CODEC_FLAG2_FAST){
319 mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
322 for(i=0;i<mb_block_count;i++) {
323 if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
329 if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
334 if (mb_type & MB_TYPE_ZERO_MV){
335 assert(mb_type & MB_TYPE_CBP);
337 s->mv_dir = MV_DIR_FORWARD;
338 if(s->picture_structure == PICT_FRAME){
339 if(!s->frame_pred_frame_dct)
340 s->interlaced_dct = get_bits1(&s->gb);
341 s->mv_type = MV_TYPE_16X16;
343 s->mv_type = MV_TYPE_FIELD;
344 mb_type |= MB_TYPE_INTERLACED;
345 s->field_select[0][0]= s->picture_structure - 1;
348 if (IS_QUANT(mb_type))
349 s->qscale = get_qscale(s);
351 s->last_mv[0][0][0] = 0;
352 s->last_mv[0][0][1] = 0;
353 s->last_mv[0][1][0] = 0;
354 s->last_mv[0][1][1] = 0;
358 assert(mb_type & MB_TYPE_L0L1);
359 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
360 /* get additional motion vector type */
361 if (s->frame_pred_frame_dct)
362 motion_type = MT_FRAME;
364 motion_type = get_bits(&s->gb, 2);
365 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
366 s->interlaced_dct = get_bits1(&s->gb);
369 if (IS_QUANT(mb_type))
370 s->qscale = get_qscale(s);
373 s->mv_dir= (mb_type>>13)&3;
374 av_dlog(s->avctx, "motion_type=%d\n", motion_type);
375 switch(motion_type) {
376 case MT_FRAME: /* or MT_16X8 */
377 if (s->picture_structure == PICT_FRAME) {
378 mb_type |= MB_TYPE_16x16;
379 s->mv_type = MV_TYPE_16X16;
381 if (USES_LIST(mb_type, i)) {
383 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
384 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
385 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
386 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
387 /* full_pel: only for MPEG-1 */
389 s->mv[i][0][0] <<= 1;
390 s->mv[i][0][1] <<= 1;
395 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
396 s->mv_type = MV_TYPE_16X8;
398 if (USES_LIST(mb_type, i)) {
401 s->field_select[i][j] = get_bits1(&s->gb);
403 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
404 s->last_mv[i][j][k]);
405 s->last_mv[i][j][k] = val;
406 s->mv[i][j][k] = val;
414 s->mv_type = MV_TYPE_FIELD;
415 if (s->picture_structure == PICT_FRAME) {
416 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
418 if (USES_LIST(mb_type, i)) {
420 s->field_select[i][j] = get_bits1(&s->gb);
421 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
422 s->last_mv[i][j][0]);
423 s->last_mv[i][j][0] = val;
424 s->mv[i][j][0] = val;
425 av_dlog(s->avctx, "fmx=%d\n", val);
426 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
427 s->last_mv[i][j][1] >> 1);
428 s->last_mv[i][j][1] = val << 1;
429 s->mv[i][j][1] = val;
430 av_dlog(s->avctx, "fmy=%d\n", val);
435 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
437 if (USES_LIST(mb_type, i)) {
438 s->field_select[i][0] = get_bits1(&s->gb);
440 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
441 s->last_mv[i][0][k]);
442 s->last_mv[i][0][k] = val;
443 s->last_mv[i][1][k] = val;
444 s->mv[i][0][k] = val;
451 s->mv_type = MV_TYPE_DMV;
453 if (USES_LIST(mb_type, i)) {
454 int dmx, dmy, mx, my, m;
455 const int my_shift= s->picture_structure == PICT_FRAME;
457 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
458 s->last_mv[i][0][0]);
459 s->last_mv[i][0][0] = mx;
460 s->last_mv[i][1][0] = mx;
462 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
463 s->last_mv[i][0][1] >> my_shift);
467 s->last_mv[i][0][1] = my<<my_shift;
468 s->last_mv[i][1][1] = my<<my_shift;
472 s->mv[i][1][0] = mx;//not used
473 s->mv[i][1][1] = my;//not used
475 if (s->picture_structure == PICT_FRAME) {
476 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
478 //m = 1 + 2 * s->top_field_first;
479 m = s->top_field_first ? 1 : 3;
481 /* top -> top pred */
482 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
483 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
485 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
486 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
488 mb_type |= MB_TYPE_16x16;
490 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
491 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
492 if(s->picture_structure == PICT_TOP_FIELD)
501 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
507 if (HAS_CBP(mb_type)) {
508 s->dsp.clear_blocks(s->block[0]);
510 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
511 if(mb_block_count > 6){
512 cbp<<= mb_block_count-6;
513 cbp |= get_bits(&s->gb, mb_block_count-6);
514 s->dsp.clear_blocks(s->block[6]);
517 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
521 //if 1, we memcpy blocks in xvmcvideo
522 if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){
523 ff_xvmc_pack_pblocks(s,cbp);
529 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
530 if(s->flags2 & CODEC_FLAG2_FAST){
533 mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
535 s->block_last_index[i] = -1;
540 cbp<<= 12-mb_block_count;
542 for(i=0;i<mb_block_count;i++) {
543 if ( cbp & (1<<11) ) {
544 if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
547 s->block_last_index[i] = -1;
553 if(s->flags2 & CODEC_FLAG2_FAST){
556 mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
558 s->block_last_index[i] = -1;
565 if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
568 s->block_last_index[i] = -1;
576 s->block_last_index[i] = -1;
580 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
585 /* as H.263, but only 17 codes */
586 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
588 int code, sign, val, l, shift;
590 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
598 sign = get_bits1(&s->gb);
602 val = (val - 1) << shift;
603 val |= get_bits(&s->gb, shift);
610 /* modulo decoding */
611 l= INT_BIT - 5 - shift;
616 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
620 int level, dc, diff, i, j, run;
622 RLTable *rl = &ff_rl_mpeg1;
623 uint8_t * const scantable= s->intra_scantable.permutated;
624 const uint16_t *quant_matrix= s->intra_matrix;
625 const int qscale= s->qscale;
628 component = (n <= 3 ? 0 : n - 4 + 1);
629 diff = decode_dc(&s->gb, component);
632 dc = s->last_dc[component];
634 s->last_dc[component] = dc;
635 block[0] = dc*quant_matrix[0];
636 av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
639 OPEN_READER(re, &s->gb);
640 /* now quantify & encode AC coefficients */
642 UPDATE_CACHE(re, &s->gb);
643 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
647 } else if(level != 0) {
650 level= (level*qscale*quant_matrix[j])>>4;
652 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
653 LAST_SKIP_BITS(re, &s->gb, 1);
656 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
657 UPDATE_CACHE(re, &s->gb);
658 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
660 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
661 } else if (level == 0) {
662 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
668 level= (level*qscale*quant_matrix[j])>>4;
672 level= (level*qscale*quant_matrix[j])>>4;
677 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
683 CLOSE_READER(re, &s->gb);
685 s->block_last_index[n] = i;
689 int ff_mpeg1_decode_block_intra(MpegEncContext *s,
693 return mpeg1_decode_block_intra(s, block, n);
696 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
700 int level, i, j, run;
701 RLTable *rl = &ff_rl_mpeg1;
702 uint8_t * const scantable= s->intra_scantable.permutated;
703 const uint16_t *quant_matrix= s->inter_matrix;
704 const int qscale= s->qscale;
707 OPEN_READER(re, &s->gb);
709 // special case for first coefficient, no need to add second VLC table
710 UPDATE_CACHE(re, &s->gb);
711 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
712 level= (3*qscale*quant_matrix[0])>>5;
714 if(GET_CACHE(re, &s->gb)&0x40000000)
718 SKIP_BITS(re, &s->gb, 2);
719 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
722 /* now quantify & encode AC coefficients */
724 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
729 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
731 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
732 SKIP_BITS(re, &s->gb, 1);
735 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
736 UPDATE_CACHE(re, &s->gb);
737 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
739 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
740 } else if (level == 0) {
741 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
747 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
751 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
756 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
761 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
763 UPDATE_CACHE(re, &s->gb);
766 LAST_SKIP_BITS(re, &s->gb, 2);
767 CLOSE_READER(re, &s->gb);
769 s->block_last_index[n] = i;
773 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
775 int level, i, j, run;
776 RLTable *rl = &ff_rl_mpeg1;
777 uint8_t * const scantable= s->intra_scantable.permutated;
778 const int qscale= s->qscale;
781 OPEN_READER(re, &s->gb);
783 // special case for first coefficient, no need to add second VLC table
784 UPDATE_CACHE(re, &s->gb);
785 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
786 level= (3*qscale)>>1;
788 if(GET_CACHE(re, &s->gb)&0x40000000)
792 SKIP_BITS(re, &s->gb, 2);
793 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
797 /* now quantify & encode AC coefficients */
799 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
804 level= ((level*2+1)*qscale)>>1;
806 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
807 SKIP_BITS(re, &s->gb, 1);
810 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
811 UPDATE_CACHE(re, &s->gb);
812 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
814 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
815 } else if (level == 0) {
816 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
822 level= ((level*2+1)*qscale)>>1;
826 level= ((level*2+1)*qscale)>>1;
832 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
834 UPDATE_CACHE(re, &s->gb);
837 LAST_SKIP_BITS(re, &s->gb, 2);
838 CLOSE_READER(re, &s->gb);
840 s->block_last_index[n] = i;
845 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
849 int level, i, j, run;
850 RLTable *rl = &ff_rl_mpeg1;
851 uint8_t * const scantable= s->intra_scantable.permutated;
852 const uint16_t *quant_matrix;
853 const int qscale= s->qscale;
859 OPEN_READER(re, &s->gb);
862 quant_matrix = s->inter_matrix;
864 quant_matrix = s->chroma_inter_matrix;
866 // special case for first coefficient, no need to add second VLC table
867 UPDATE_CACHE(re, &s->gb);
868 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
869 level= (3*qscale*quant_matrix[0])>>5;
870 if(GET_CACHE(re, &s->gb)&0x40000000)
875 SKIP_BITS(re, &s->gb, 2);
876 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
880 /* now quantify & encode AC coefficients */
882 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
887 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
888 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
889 SKIP_BITS(re, &s->gb, 1);
892 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
893 UPDATE_CACHE(re, &s->gb);
894 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
899 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
902 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
906 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
912 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
914 UPDATE_CACHE(re, &s->gb);
917 LAST_SKIP_BITS(re, &s->gb, 2);
918 CLOSE_READER(re, &s->gb);
920 block[63] ^= (mismatch & 1);
922 s->block_last_index[n] = i;
926 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
930 int level, i, j, run;
931 RLTable *rl = &ff_rl_mpeg1;
932 uint8_t * const scantable= s->intra_scantable.permutated;
933 const int qscale= s->qscale;
934 OPEN_READER(re, &s->gb);
937 // special case for first coefficient, no need to add second VLC table
938 UPDATE_CACHE(re, &s->gb);
939 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
940 level= (3*qscale)>>1;
941 if(GET_CACHE(re, &s->gb)&0x40000000)
945 SKIP_BITS(re, &s->gb, 2);
946 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
950 /* now quantify & encode AC coefficients */
952 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
957 level= ((level*2+1)*qscale)>>1;
958 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
959 SKIP_BITS(re, &s->gb, 1);
962 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
963 UPDATE_CACHE(re, &s->gb);
964 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
969 level= ((-level*2+1)*qscale)>>1;
972 level= ((level*2+1)*qscale)>>1;
977 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
979 UPDATE_CACHE(re, &s->gb);
982 LAST_SKIP_BITS(re, &s->gb, 2);
983 CLOSE_READER(re, &s->gb);
984 s->block_last_index[n] = i;
989 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
993 int level, dc, diff, i, j, run;
996 uint8_t * const scantable= s->intra_scantable.permutated;
997 const uint16_t *quant_matrix;
998 const int qscale= s->qscale;
1001 /* DC coefficient */
1003 quant_matrix = s->intra_matrix;
1006 quant_matrix = s->chroma_intra_matrix;
1007 component = (n&1) + 1;
1009 diff = decode_dc(&s->gb, component);
1012 dc = s->last_dc[component];
1014 s->last_dc[component] = dc;
1015 block[0] = dc << (3 - s->intra_dc_precision);
1016 av_dlog(s->avctx, "dc=%d\n", block[0]);
1017 mismatch = block[0] ^ 1;
1019 if (s->intra_vlc_format)
1025 OPEN_READER(re, &s->gb);
1026 /* now quantify & encode AC coefficients */
1028 UPDATE_CACHE(re, &s->gb);
1029 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1033 } else if(level != 0) {
1036 level= (level*qscale*quant_matrix[j])>>4;
1037 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1038 LAST_SKIP_BITS(re, &s->gb, 1);
1041 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1042 UPDATE_CACHE(re, &s->gb);
1043 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1047 level= (-level*qscale*quant_matrix[j])>>4;
1050 level= (level*qscale*quant_matrix[j])>>4;
1054 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1061 CLOSE_READER(re, &s->gb);
1063 block[63]^= mismatch&1;
1065 s->block_last_index[n] = i;
1069 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
1073 int level, dc, diff, j, run;
1076 uint8_t * scantable= s->intra_scantable.permutated;
1077 const uint16_t *quant_matrix;
1078 const int qscale= s->qscale;
1080 /* DC coefficient */
1082 quant_matrix = s->intra_matrix;
1085 quant_matrix = s->chroma_intra_matrix;
1086 component = (n&1) + 1;
1088 diff = decode_dc(&s->gb, component);
1091 dc = s->last_dc[component];
1093 s->last_dc[component] = dc;
1094 block[0] = dc << (3 - s->intra_dc_precision);
1095 if (s->intra_vlc_format)
1101 OPEN_READER(re, &s->gb);
1102 /* now quantify & encode AC coefficients */
1104 UPDATE_CACHE(re, &s->gb);
1105 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1109 } else if(level != 0) {
1112 level= (level*qscale*quant_matrix[j])>>4;
1113 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1114 LAST_SKIP_BITS(re, &s->gb, 1);
1117 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1118 UPDATE_CACHE(re, &s->gb);
1119 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1123 level= (-level*qscale*quant_matrix[j])>>4;
1126 level= (level*qscale*quant_matrix[j])>>4;
1132 CLOSE_READER(re, &s->gb);
1135 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
1139 typedef struct Mpeg1Context {
1140 MpegEncContext mpeg_enc_ctx;
1141 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1142 int repeat_field; /* true if we must repeat the field */
1143 AVPanScan pan_scan; /**< some temporary storage for the panscan */
1145 int swap_uv;//indicate VCR2
1146 int save_aspect_info;
1147 int save_width, save_height, save_progressive_seq;
1148 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
1149 int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
1152 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1154 Mpeg1Context *s = avctx->priv_data;
1155 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1158 /* we need some permutation to store matrices,
1159 * until MPV_common_init() sets the real permutation. */
1161 s2->dsp.idct_permutation[i]=i;
1163 MPV_decode_defaults(s2);
1165 s->mpeg_enc_ctx.avctx= avctx;
1166 s->mpeg_enc_ctx.flags= avctx->flags;
1167 s->mpeg_enc_ctx.flags2= avctx->flags2;
1168 ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1169 ff_mpeg12_init_vlcs();
1171 s->mpeg_enc_ctx_allocated = 0;
1172 s->mpeg_enc_ctx.picture_number = 0;
1173 s->repeat_field = 0;
1174 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1175 avctx->color_range= AVCOL_RANGE_MPEG;
1176 if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
1177 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1179 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1183 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1185 Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1186 MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1189 if(avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1192 err = ff_mpeg_update_thread_context(avctx, avctx_from);
1195 if(!ctx->mpeg_enc_ctx_allocated)
1196 memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1198 if(!(s->pict_type == FF_B_TYPE || s->low_delay))
1199 s->picture_number++;
1204 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1205 const uint8_t *new_perm){
1206 uint16_t temp_matrix[64];
1209 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
1212 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1216 static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx){
1217 Mpeg1Context *s1 = avctx->priv_data;
1218 MpegEncContext *s = &s1->mpeg_enc_ctx;
1220 if(avctx->xvmc_acceleration)
1221 return avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
1222 else if(avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
1223 if(avctx->codec_id == CODEC_ID_MPEG1VIDEO)
1224 return PIX_FMT_VDPAU_MPEG1;
1226 return PIX_FMT_VDPAU_MPEG2;
1228 if(s->chroma_format < 2)
1229 return avctx->get_format(avctx,ff_hwaccel_pixfmt_list_420);
1230 else if(s->chroma_format == 2)
1231 return PIX_FMT_YUV422P;
1233 return PIX_FMT_YUV444P;
1237 /* Call this function when we know all parameters.
1238 * It may be called in different places for MPEG-1 and MPEG-2. */
1239 static int mpeg_decode_postinit(AVCodecContext *avctx){
1240 Mpeg1Context *s1 = avctx->priv_data;
1241 MpegEncContext *s = &s1->mpeg_enc_ctx;
1242 uint8_t old_permutation[64];
1245 (s1->mpeg_enc_ctx_allocated == 0)||
1246 avctx->coded_width != s->width ||
1247 avctx->coded_height != s->height||
1248 s1->save_width != s->width ||
1249 s1->save_height != s->height ||
1250 s1->save_aspect_info != s->aspect_ratio_info||
1251 s1->save_progressive_seq != s->progressive_sequence ||
1255 if (s1->mpeg_enc_ctx_allocated) {
1256 ParseContext pc= s->parse_context;
1257 s->parse_context.buffer=0;
1259 s->parse_context= pc;
1262 if( (s->width == 0 )||(s->height == 0))
1265 avcodec_set_dimensions(avctx, s->width, s->height);
1266 avctx->bit_rate = s->bit_rate;
1267 s1->save_aspect_info = s->aspect_ratio_info;
1268 s1->save_width = s->width;
1269 s1->save_height = s->height;
1270 s1->save_progressive_seq = s->progressive_sequence;
1272 /* low_delay may be forced, in this case we will have B-frames
1273 * that behave like P-frames. */
1274 avctx->has_b_frames = !(s->low_delay);
1276 assert((avctx->sub_id==1) == (avctx->codec_id==CODEC_ID_MPEG1VIDEO));
1277 if(avctx->codec_id==CODEC_ID_MPEG1VIDEO){
1279 avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
1280 avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
1282 avctx->sample_aspect_ratio= av_d2q(
1283 1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1284 avctx->ticks_per_frame=1;
1288 &s->avctx->time_base.den,
1289 &s->avctx->time_base.num,
1290 ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1291 ff_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){
1299 ff_mpeg2_aspect[s->aspect_ratio_info],
1300 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
1302 (AVRational){s->width, s->height});
1304 //we ignore the spec here and guess a bit as reality does not match the spec, see for example
1305 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1306 //issue1613, 621, 562
1307 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0)
1308 || (av_cmp_q(dar,(AVRational){4,3})&&av_cmp_q(dar,(AVRational){16,9}))){
1309 s->avctx->sample_aspect_ratio=
1311 ff_mpeg2_aspect[s->aspect_ratio_info],
1312 (AVRational){s->width, s->height}
1315 s->avctx->sample_aspect_ratio=
1317 ff_mpeg2_aspect[s->aspect_ratio_info],
1318 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
1320 //issue1613 4/3 16/9 -> 16/9
1321 //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1322 //widescreen-issue562.mpg 4/3 16/9 -> 16/9
1323 // s->avctx->sample_aspect_ratio= av_mul_q(s->avctx->sample_aspect_ratio, (AVRational){s->width, s->height});
1324 //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);
1325 //av_log(NULL, AV_LOG_ERROR, "B %d/%d\n",s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den);
1328 s->avctx->sample_aspect_ratio=
1329 ff_mpeg2_aspect[s->aspect_ratio_info];
1333 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1334 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1335 //until then pix_fmt may be changed right after codec init
1336 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
1338 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU )
1339 if( avctx->idct_algo == FF_IDCT_AUTO )
1340 avctx->idct_algo = FF_IDCT_SIMPLE;
1342 /* Quantization matrices may need reordering
1343 * if DCT permutation is changed. */
1344 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
1346 if (MPV_common_init(s) < 0)
1349 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
1350 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
1351 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
1352 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
1354 s1->mpeg_enc_ctx_allocated = 1;
1359 static int mpeg1_decode_picture(AVCodecContext *avctx,
1360 const uint8_t *buf, int buf_size)
1362 Mpeg1Context *s1 = avctx->priv_data;
1363 MpegEncContext *s = &s1->mpeg_enc_ctx;
1364 int ref, f_code, vbv_delay;
1366 init_get_bits(&s->gb, buf, buf_size*8);
1368 ref = get_bits(&s->gb, 10); /* temporal ref */
1369 s->pict_type = get_bits(&s->gb, 3);
1370 if(s->pict_type == 0 || s->pict_type > 3)
1373 vbv_delay= get_bits(&s->gb, 16);
1374 if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
1375 s->full_pel[0] = get_bits1(&s->gb);
1376 f_code = get_bits(&s->gb, 3);
1377 if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT)
1379 s->mpeg_f_code[0][0] = f_code;
1380 s->mpeg_f_code[0][1] = f_code;
1382 if (s->pict_type == FF_B_TYPE) {
1383 s->full_pel[1] = get_bits1(&s->gb);
1384 f_code = get_bits(&s->gb, 3);
1385 if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT)
1387 s->mpeg_f_code[1][0] = f_code;
1388 s->mpeg_f_code[1][1] = f_code;
1390 s->current_picture.pict_type= s->pict_type;
1391 s->current_picture.key_frame= s->pict_type == FF_I_TYPE;
1393 if(avctx->debug & FF_DEBUG_PICT_INFO)
1394 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1401 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1403 MpegEncContext *s= &s1->mpeg_enc_ctx;
1404 int horiz_size_ext, vert_size_ext;
1407 skip_bits(&s->gb, 1); /* profile and level esc*/
1408 s->avctx->profile= get_bits(&s->gb, 3);
1409 s->avctx->level= get_bits(&s->gb, 4);
1410 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1411 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1412 horiz_size_ext = get_bits(&s->gb, 2);
1413 vert_size_ext = get_bits(&s->gb, 2);
1414 s->width |= (horiz_size_ext << 12);
1415 s->height |= (vert_size_ext << 12);
1416 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1417 s->bit_rate += (bit_rate_ext << 18) * 400;
1418 skip_bits1(&s->gb); /* marker */
1419 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
1421 s->low_delay = get_bits1(&s->gb);
1422 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1424 s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
1425 s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
1427 av_dlog(s->avctx, "sequence extension\n");
1428 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1429 s->avctx->sub_id = 2; /* indicates MPEG-2 found */
1431 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1432 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1433 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1437 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1439 MpegEncContext *s= &s1->mpeg_enc_ctx;
1440 int color_description, w, h;
1442 skip_bits(&s->gb, 3); /* video format */
1443 color_description= get_bits1(&s->gb);
1444 if(color_description){
1445 s->avctx->color_primaries= get_bits(&s->gb, 8);
1446 s->avctx->color_trc = get_bits(&s->gb, 8);
1447 s->avctx->colorspace = get_bits(&s->gb, 8);
1449 w= get_bits(&s->gb, 14);
1450 skip_bits(&s->gb, 1); //marker
1451 h= get_bits(&s->gb, 14);
1452 // remaining 3 bits are zero padding
1454 s1->pan_scan.width= 16*w;
1455 s1->pan_scan.height=16*h;
1457 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1458 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1461 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1463 MpegEncContext *s= &s1->mpeg_enc_ctx;
1467 if(s->progressive_sequence){
1468 if(s->repeat_first_field){
1470 if(s->top_field_first)
1474 if(s->picture_structure == PICT_FRAME){
1476 if(s->repeat_first_field)
1480 for(i=0; i<nofco; i++){
1481 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1482 skip_bits(&s->gb, 1); //marker
1483 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1484 skip_bits(&s->gb, 1); //marker
1487 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1488 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1489 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1490 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1491 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1495 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra){
1498 for(i=0; i<64; i++) {
1499 int j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1500 int v = get_bits(&s->gb, 8);
1502 av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1505 if(intra && i==0 && v!=8){
1506 av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1507 v= 8; // needed by pink.mpg / issue1046
1516 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1518 av_dlog(s->avctx, "matrix extension\n");
1520 if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1521 if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1522 if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1);
1523 if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0);
1526 static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1528 MpegEncContext *s= &s1->mpeg_enc_ctx;
1530 s->full_pel[0] = s->full_pel[1] = 0;
1531 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1532 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1533 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1534 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1535 if(!s->pict_type && s1->mpeg_enc_ctx_allocated){
1536 av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1537 if(s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1]==15){
1538 if(s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1539 s->pict_type= FF_I_TYPE;
1541 s->pict_type= FF_P_TYPE;
1543 s->pict_type= FF_B_TYPE;
1544 s->current_picture.pict_type= s->pict_type;
1545 s->current_picture.key_frame= s->pict_type == FF_I_TYPE;
1547 s->intra_dc_precision = get_bits(&s->gb, 2);
1548 s->picture_structure = get_bits(&s->gb, 2);
1549 s->top_field_first = get_bits1(&s->gb);
1550 s->frame_pred_frame_dct = get_bits1(&s->gb);
1551 s->concealment_motion_vectors = get_bits1(&s->gb);
1552 s->q_scale_type = get_bits1(&s->gb);
1553 s->intra_vlc_format = get_bits1(&s->gb);
1554 s->alternate_scan = get_bits1(&s->gb);
1555 s->repeat_first_field = get_bits1(&s->gb);
1556 s->chroma_420_type = get_bits1(&s->gb);
1557 s->progressive_frame = get_bits1(&s->gb);
1559 if(s->progressive_sequence && !s->progressive_frame){
1560 s->progressive_frame= 1;
1561 av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1564 if(s->picture_structure==0 || (s->progressive_frame && s->picture_structure!=PICT_FRAME)){
1565 av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1566 s->picture_structure= PICT_FRAME;
1569 if(s->progressive_sequence && !s->frame_pred_frame_dct){
1570 av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
1571 s->frame_pred_frame_dct= 1;
1574 if(s->picture_structure == PICT_FRAME){
1576 s->v_edge_pos= 16*s->mb_height;
1578 s->first_field ^= 1;
1579 s->v_edge_pos= 8*s->mb_height;
1580 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
1583 if(s->alternate_scan){
1584 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
1585 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
1587 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
1588 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
1591 /* composite display not parsed */
1592 av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1593 av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1594 av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1595 av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1596 av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1597 av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1598 av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1599 av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1600 av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1603 static void exchange_uv(MpegEncContext *s){
1606 tmp = s->pblocks[4];
1607 s->pblocks[4] = s->pblocks[5];
1608 s->pblocks[5] = tmp;
1611 static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size){
1612 AVCodecContext *avctx= s->avctx;
1613 Mpeg1Context *s1 = (Mpeg1Context*)s;
1615 /* start frame decoding */
1616 if(s->first_field || s->picture_structure==PICT_FRAME){
1617 if(MPV_frame_start(s, avctx) < 0)
1620 ff_er_frame_start(s);
1622 /* first check if we must repeat the frame */
1623 s->current_picture_ptr->repeat_pict = 0;
1624 if (s->repeat_first_field) {
1625 if (s->progressive_sequence) {
1626 if (s->top_field_first)
1627 s->current_picture_ptr->repeat_pict = 4;
1629 s->current_picture_ptr->repeat_pict = 2;
1630 } else if (s->progressive_frame) {
1631 s->current_picture_ptr->repeat_pict = 1;
1635 *s->current_picture_ptr->pan_scan= s1->pan_scan;
1637 if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1638 ff_thread_finish_setup(avctx);
1639 }else{ //second field
1642 if(!s->current_picture_ptr){
1643 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1648 s->current_picture.data[i] = s->current_picture_ptr->data[i];
1649 if(s->picture_structure == PICT_BOTTOM_FIELD){
1650 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
1655 if (avctx->hwaccel) {
1656 if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1660 // MPV_frame_start will call this function too,
1661 // but we need to call it on every field
1662 if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1663 if(ff_xvmc_field_start(s,avctx) < 0)
1669 #define DECODE_SLICE_ERROR -1
1670 #define DECODE_SLICE_OK 0
1673 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
1674 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
1675 * DECODE_SLICE_OK if this slice is ok<br>
1677 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
1678 const uint8_t **buf, int buf_size)
1680 MpegEncContext *s = &s1->mpeg_enc_ctx;
1681 AVCodecContext *avctx= s->avctx;
1682 const int field_pic= s->picture_structure != PICT_FRAME;
1683 const int lowres= s->avctx->lowres;
1688 assert(mb_y < s->mb_height);
1690 init_get_bits(&s->gb, *buf, buf_size*8);
1692 ff_mpeg1_clean_buffers(s);
1693 s->interlaced_dct = 0;
1695 s->qscale = get_qscale(s);
1698 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1702 /* extra slice info */
1703 while (get_bits1(&s->gb) != 0) {
1704 skip_bits(&s->gb, 8);
1709 if(mb_y==0 && s->codec_tag == AV_RL32("SLIF")){
1713 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1715 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1722 /* otherwise, stuffing, nothing to do */
1730 if(s->mb_x >= (unsigned)s->mb_width){
1731 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1735 if (avctx->hwaccel) {
1736 const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1737 int start_code = -1;
1738 buf_end = ff_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1739 if (buf_end < *buf + buf_size)
1742 if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1743 return DECODE_SLICE_ERROR;
1745 return DECODE_SLICE_OK;
1748 s->resync_mb_x= s->mb_x;
1749 s->resync_mb_y= s->mb_y= mb_y;
1751 ff_init_block_index(s);
1753 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
1754 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
1755 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",
1756 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],
1757 s->pict_type == FF_I_TYPE ? "I" : (s->pict_type == FF_P_TYPE ? "P" : (s->pict_type == FF_B_TYPE ? "B" : "S")),
1758 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1759 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1760 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1765 //If 1, we memcpy blocks in xvmcvideo.
1766 if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1767 ff_xvmc_init_block(s);//set s->block
1769 if(mpeg_decode_mb(s, s->block) < 0)
1772 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
1773 const int wrap = s->b8_stride;
1774 int xy = s->mb_x*2 + s->mb_y*2*wrap;
1775 int b8_xy= 4*(s->mb_x + s->mb_y*s->mb_stride);
1776 int motion_x, motion_y, dir, i;
1779 for(dir=0; dir<2; dir++){
1780 if (s->mb_intra || (dir==1 && s->pict_type != FF_B_TYPE)) {
1781 motion_x = motion_y = 0;
1782 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
1783 motion_x = s->mv[dir][0][0];
1784 motion_y = s->mv[dir][0][1];
1785 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1786 motion_x = s->mv[dir][i][0];
1787 motion_y = s->mv[dir][i][1];
1790 s->current_picture.motion_val[dir][xy ][0] = motion_x;
1791 s->current_picture.motion_val[dir][xy ][1] = motion_y;
1792 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1793 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1794 s->current_picture.ref_index [dir][b8_xy ]=
1795 s->current_picture.ref_index [dir][b8_xy + 1]= s->field_select[dir][i];
1796 assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
1803 s->dest[0] += 16 >> lowres;
1804 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1805 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1807 MPV_decode_mb(s, s->block);
1809 if (++s->mb_x >= s->mb_width) {
1810 const int mb_size= 16>>s->avctx->lowres;
1812 ff_draw_horiz_band(s, mb_size*(s->mb_y>>field_pic), mb_size);
1813 MPV_report_decode_progress(s);
1816 s->mb_y += 1<<field_pic;
1818 if(s->mb_y >= s->mb_height){
1819 int left= get_bits_left(&s->gb);
1820 int is_d10= s->chroma_format==2 && s->pict_type==FF_I_TYPE && avctx->profile==0 && avctx->level==5
1821 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1822 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1824 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1825 || (avctx->error_recognition >= FF_ER_AGGRESSIVE && left>8)){
1826 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1832 ff_init_block_index(s);
1835 /* skip mb handling */
1836 if (s->mb_skip_run == -1) {
1837 /* read increment again */
1840 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1842 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1847 s->mb_skip_run += 33;
1848 }else if(code == 35){
1849 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
1850 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1853 goto eos; /* end of slice */
1855 /* otherwise, stuffing, nothing to do */
1857 s->mb_skip_run += code;
1863 if(s->pict_type == FF_I_TYPE){
1864 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1871 s->block_last_index[i] = -1;
1872 if(s->picture_structure == PICT_FRAME)
1873 s->mv_type = MV_TYPE_16X16;
1875 s->mv_type = MV_TYPE_FIELD;
1876 if (s->pict_type == FF_P_TYPE) {
1877 /* if P type, zero motion vector is implied */
1878 s->mv_dir = MV_DIR_FORWARD;
1879 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1880 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1881 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1882 s->field_select[0][0]= (s->picture_structure - 1) & 1;
1884 /* if B type, reuse previous vectors and directions */
1885 s->mv[0][0][0] = s->last_mv[0][0][0];
1886 s->mv[0][0][1] = s->last_mv[0][0][1];
1887 s->mv[1][0][0] = s->last_mv[1][0][0];
1888 s->mv[1][0][1] = s->last_mv[1][0][1];
1893 eos: // end of slice
1894 *buf += (get_bits_count(&s->gb)-1)/8;
1895 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1899 static int slice_decode_thread(AVCodecContext *c, void *arg){
1900 MpegEncContext *s= *(void**)arg;
1901 const uint8_t *buf= s->gb.buffer;
1902 int mb_y= s->start_mb_y;
1903 const int field_pic= s->picture_structure != PICT_FRAME;
1905 s->error_count= (3*(s->end_mb_y - s->start_mb_y)*s->mb_width) >> field_pic;
1908 uint32_t start_code;
1911 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
1913 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1914 //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);
1916 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
1917 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
1919 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
1922 if(s->mb_y == s->end_mb_y)
1926 buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
1927 mb_y= start_code - SLICE_MIN_START_CODE;
1928 if(mb_y < 0 || mb_y >= s->end_mb_y)
1932 return 0; //not reached
1936 * Handle slice ends.
1937 * @return 1 if it seems to be the last slice
1939 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1941 Mpeg1Context *s1 = avctx->priv_data;
1942 MpegEncContext *s = &s1->mpeg_enc_ctx;
1944 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1947 if (s->avctx->hwaccel) {
1948 if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1949 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1952 if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1953 ff_xvmc_field_end(s);
1955 /* end of slice reached */
1956 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
1959 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
1965 if (s->pict_type == FF_B_TYPE || s->low_delay) {
1966 *pict= *(AVFrame*)s->current_picture_ptr;
1967 ff_print_debug_info(s, pict);
1969 if (avctx->active_thread_type&FF_THREAD_FRAME)
1970 s->picture_number++;
1971 /* latency of 1 frame for I- and P-frames */
1972 /* XXX: use another variable than picture_number */
1973 if (s->last_picture_ptr != NULL) {
1974 *pict= *(AVFrame*)s->last_picture_ptr;
1975 ff_print_debug_info(s, pict);
1985 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1986 const uint8_t *buf, int buf_size)
1988 Mpeg1Context *s1 = avctx->priv_data;
1989 MpegEncContext *s = &s1->mpeg_enc_ctx;
1993 init_get_bits(&s->gb, buf, buf_size*8);
1995 width = get_bits(&s->gb, 12);
1996 height = get_bits(&s->gb, 12);
1997 if (width <= 0 || height <= 0)
1999 s->aspect_ratio_info= get_bits(&s->gb, 4);
2000 if (s->aspect_ratio_info == 0) {
2001 av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2002 if (avctx->error_recognition >= FF_ER_COMPLIANT)
2005 s->frame_rate_index = get_bits(&s->gb, 4);
2006 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2008 s->bit_rate = get_bits(&s->gb, 18) * 400;
2009 if (get_bits1(&s->gb) == 0) /* marker */
2014 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2015 skip_bits(&s->gb, 1);
2018 if (get_bits1(&s->gb)) {
2019 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2022 j = s->dsp.idct_permutation[i];
2023 v = ff_mpeg1_default_intra_matrix[i];
2024 s->intra_matrix[j] = v;
2025 s->chroma_intra_matrix[j] = v;
2028 if (get_bits1(&s->gb)) {
2029 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2032 int j= s->dsp.idct_permutation[i];
2033 v = ff_mpeg1_default_non_intra_matrix[i];
2034 s->inter_matrix[j] = v;
2035 s->chroma_inter_matrix[j] = v;
2039 if(show_bits(&s->gb, 23) != 0){
2040 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2044 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2045 s->progressive_sequence = 1;
2046 s->progressive_frame = 1;
2047 s->picture_structure = PICT_FRAME;
2048 s->frame_pred_frame_dct = 1;
2049 s->chroma_format = 1;
2050 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2051 avctx->sub_id = 1; /* indicates MPEG-1 */
2052 s->out_format = FMT_MPEG1;
2053 s->swap_uv = 0;//AFAIK VCR2 does not have SEQ_HEADER
2054 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2056 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2057 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2058 s->avctx->rc_buffer_size, s->bit_rate);
2063 static int vcr2_init_sequence(AVCodecContext *avctx)
2065 Mpeg1Context *s1 = avctx->priv_data;
2066 MpegEncContext *s = &s1->mpeg_enc_ctx;
2069 /* start new MPEG-1 context decoding */
2070 s->out_format = FMT_MPEG1;
2071 if (s1->mpeg_enc_ctx_allocated) {
2074 s->width = avctx->coded_width;
2075 s->height = avctx->coded_height;
2076 avctx->has_b_frames= 0; //true?
2079 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2080 avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2082 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel ||
2083 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU )
2084 if( avctx->idct_algo == FF_IDCT_AUTO )
2085 avctx->idct_algo = FF_IDCT_SIMPLE;
2087 if (MPV_common_init(s) < 0)
2089 exchange_uv(s);//common init reset pblocks, so we swap them here
2090 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2091 s1->mpeg_enc_ctx_allocated = 1;
2094 int j= s->dsp.idct_permutation[i];
2095 v = ff_mpeg1_default_intra_matrix[i];
2096 s->intra_matrix[j] = v;
2097 s->chroma_intra_matrix[j] = v;
2099 v = ff_mpeg1_default_non_intra_matrix[i];
2100 s->inter_matrix[j] = v;
2101 s->chroma_inter_matrix[j] = v;
2104 s->progressive_sequence = 1;
2105 s->progressive_frame = 1;
2106 s->picture_structure = PICT_FRAME;
2107 s->frame_pred_frame_dct = 1;
2108 s->chroma_format = 1;
2109 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2110 avctx->sub_id = 2; /* indicates MPEG-2 */
2111 s1->save_width = s->width;
2112 s1->save_height = s->height;
2113 s1->save_progressive_seq = s->progressive_sequence;
2118 static void mpeg_decode_user_data(AVCodecContext *avctx,
2119 const uint8_t *p, int buf_size)
2121 const uint8_t *buf_end = p+buf_size;
2123 /* we parse the DTG active format information */
2124 if (buf_end - p >= 5 &&
2125 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2133 if (buf_end - p < 1)
2135 avctx->dtg_active_format = p[0] & 0x0f;
2140 static void mpeg_decode_gop(AVCodecContext *avctx,
2141 const uint8_t *buf, int buf_size){
2142 Mpeg1Context *s1 = avctx->priv_data;
2143 MpegEncContext *s = &s1->mpeg_enc_ctx;
2145 int drop_frame_flag;
2146 int time_code_hours, time_code_minutes;
2147 int time_code_seconds, time_code_pictures;
2150 init_get_bits(&s->gb, buf, buf_size*8);
2152 drop_frame_flag = get_bits1(&s->gb);
2154 time_code_hours=get_bits(&s->gb,5);
2155 time_code_minutes = get_bits(&s->gb,6);
2156 skip_bits1(&s->gb);//marker bit
2157 time_code_seconds = get_bits(&s->gb,6);
2158 time_code_pictures = get_bits(&s->gb,6);
2160 s->closed_gop = get_bits1(&s->gb);
2161 /*broken_link indicate that after editing the
2162 reference frames of the first B-Frames after GOP I-Frame
2163 are missing (open gop)*/
2164 broken_link = get_bits1(&s->gb);
2166 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2167 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2168 time_code_hours, time_code_minutes, time_code_seconds,
2169 time_code_pictures, s->closed_gop, broken_link);
2172 * Find the end of the current frame in the bitstream.
2173 * @return the position of the first byte of the next frame, or -1
2175 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2178 uint32_t state= pc->state;
2180 /* EOF considered as end of frame */
2185 0 frame start -> 1/4
2186 1 first_SEQEXT -> 0/2
2187 2 first field start -> 3/0
2188 3 second_SEQEXT -> 2/0
2192 for(i=0; i<buf_size; i++){
2193 assert(pc->frame_start_found>=0 && pc->frame_start_found<=4);
2194 if(pc->frame_start_found&1){
2195 if(state == EXT_START_CODE && (buf[i]&0xF0) != 0x80)
2196 pc->frame_start_found--;
2197 else if(state == EXT_START_CODE+2){
2198 if((buf[i]&3) == 3) pc->frame_start_found= 0;
2199 else pc->frame_start_found= (pc->frame_start_found+1)&3;
2203 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
2204 if(pc->frame_start_found==0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2206 pc->frame_start_found=4;
2208 if(state == SEQ_END_CODE){
2212 if(pc->frame_start_found==2 && state == SEQ_START_CODE)
2213 pc->frame_start_found= 0;
2214 if(pc->frame_start_found<4 && state == EXT_START_CODE)
2215 pc->frame_start_found++;
2216 if(pc->frame_start_found == 4 && (state&0xFFFFFF00) == 0x100){
2217 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2218 pc->frame_start_found=0;
2223 if(pc->frame_start_found == 0 && s && state == PICTURE_START_CODE){
2224 ff_fetch_timestamp(s, i-3, 1);
2229 return END_NOT_FOUND;
2232 static int decode_chunks(AVCodecContext *avctx,
2233 AVFrame *picture, int *data_size,
2234 const uint8_t *buf, int buf_size);
2236 /* handle buffering and image synchronisation */
2237 static int mpeg_decode_frame(AVCodecContext *avctx,
2238 void *data, int *data_size,
2241 const uint8_t *buf = avpkt->data;
2242 int buf_size = avpkt->size;
2243 Mpeg1Context *s = avctx->priv_data;
2244 AVFrame *picture = data;
2245 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2246 av_dlog(avctx, "fill_buffer\n");
2248 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2249 /* special case for last picture */
2250 if (s2->low_delay==0 && s2->next_picture_ptr) {
2251 *picture= *(AVFrame*)s2->next_picture_ptr;
2252 s2->next_picture_ptr= NULL;
2254 *data_size = sizeof(AVFrame);
2259 if(s2->flags&CODEC_FLAG_TRUNCATED){
2260 int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2262 if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
2267 if (s->repeat_field % 2 == 1) {
2269 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2270 // s2->picture_number, s->repeat_field);
2271 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2272 *data_size = sizeof(AVPicture);
2278 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == AV_RL32("VCR2"))
2279 vcr2_init_sequence(avctx);
2283 if(avctx->extradata && !avctx->frame_number)
2284 decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2286 return decode_chunks(avctx, picture, data_size, buf, buf_size);
2289 static int decode_chunks(AVCodecContext *avctx,
2290 AVFrame *picture, int *data_size,
2291 const uint8_t *buf, int buf_size)
2293 Mpeg1Context *s = avctx->priv_data;
2294 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2295 const uint8_t *buf_ptr = buf;
2296 const uint8_t *buf_end = buf + buf_size;
2297 int ret, input_size;
2301 /* find next start code */
2302 uint32_t start_code = -1;
2303 buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
2304 if (start_code > 0x1ff){
2305 if(s2->pict_type != FF_B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
2306 if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
2309 avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2310 for(i=0; i<s->slice_count; i++)
2311 s2->error_count += s2->thread_context[i]->error_count;
2314 if (CONFIG_MPEG_VDPAU_DECODER && avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2315 ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2317 if (slice_end(avctx, picture)) {
2318 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2319 *data_size = sizeof(AVPicture);
2323 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2326 input_size = buf_end - buf_ptr;
2328 if(avctx->debug & FF_DEBUG_STARTCODE){
2329 av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2332 /* prepare data for next start code */
2333 switch(start_code) {
2334 case SEQ_START_CODE:
2336 mpeg1_decode_sequence(avctx, buf_ptr,
2340 av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2344 case PICTURE_START_CODE:
2345 if(last_code == 0 || last_code == SLICE_MIN_START_CODE){
2346 if(mpeg_decode_postinit(avctx) < 0){
2347 av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2351 /* we have a complete image: we try to decompress it */
2352 if(mpeg1_decode_picture(avctx,
2353 buf_ptr, input_size) < 0)
2355 s2->first_slice = 1;
2356 last_code= PICTURE_START_CODE;
2358 av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2361 case EXT_START_CODE:
2362 init_get_bits(&s2->gb, buf_ptr, input_size*8);
2364 switch(get_bits(&s2->gb, 4)) {
2367 mpeg_decode_sequence_extension(s);
2369 av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2373 mpeg_decode_sequence_display_extension(s);
2376 mpeg_decode_quant_matrix_extension(s2);
2379 mpeg_decode_picture_display_extension(s);
2382 if(last_code == PICTURE_START_CODE){
2383 mpeg_decode_picture_coding_extension(s);
2385 av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2390 case USER_START_CODE:
2391 mpeg_decode_user_data(avctx,
2392 buf_ptr, input_size);
2394 case GOP_START_CODE:
2397 mpeg_decode_gop(avctx,
2398 buf_ptr, input_size);
2401 av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2405 if (start_code >= SLICE_MIN_START_CODE &&
2406 start_code <= SLICE_MAX_START_CODE && last_code!=0) {
2407 const int field_pic= s2->picture_structure != PICT_FRAME;
2408 int mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
2409 last_code= SLICE_MIN_START_CODE;
2411 if(s2->picture_structure == PICT_BOTTOM_FIELD)
2414 if (mb_y >= s2->mb_height){
2415 av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2419 if(s2->last_picture_ptr==NULL){
2420 /* Skip B-frames if we do not have reference frames and gop is not closed */
2421 if(s2->pict_type==FF_B_TYPE){
2426 if(s2->pict_type==FF_I_TYPE)
2428 if(s2->next_picture_ptr==NULL){
2429 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2430 if(s2->pict_type==FF_P_TYPE && !s->sync) break;
2432 /* Skip B-frames if we are in a hurry. */
2433 if(avctx->hurry_up && s2->pict_type==FF_B_TYPE) break;
2434 if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==FF_B_TYPE)
2435 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=FF_I_TYPE)
2436 || avctx->skip_frame >= AVDISCARD_ALL)
2438 /* Skip everything if we are in a hurry>=5. */
2439 if(avctx->hurry_up>=5) break;
2441 if (!s->mpeg_enc_ctx_allocated) break;
2443 if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
2444 if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2449 av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2453 if(s2->first_slice){
2455 if(mpeg_field_start(s2, buf, buf_size) < 0)
2458 if(!s2->current_picture_ptr){
2459 av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2463 if (avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {
2468 if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
2469 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2470 if(threshold <= mb_y){
2471 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2473 thread_context->start_mb_y= mb_y;
2474 thread_context->end_mb_y = s2->mb_height;
2476 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2477 ff_update_duplicate_context(thread_context, s2);
2479 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2482 buf_ptr += 2; //FIXME add minimum number of bytes per slice
2484 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2488 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2489 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
2491 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
2500 static void flush(AVCodecContext *avctx){
2501 Mpeg1Context *s = avctx->priv_data;
2505 ff_mpeg_flush(avctx);
2508 static int mpeg_decode_end(AVCodecContext *avctx)
2510 Mpeg1Context *s = avctx->priv_data;
2512 if (s->mpeg_enc_ctx_allocated)
2513 MPV_common_end(&s->mpeg_enc_ctx);
2517 static const AVProfile mpeg2_video_profiles[] = {
2518 { FF_PROFILE_MPEG2_422, "4:2:2" },
2519 { FF_PROFILE_MPEG2_HIGH, "High" },
2520 { FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
2521 { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
2522 { FF_PROFILE_MPEG2_MAIN, "Main" },
2523 { FF_PROFILE_MPEG2_SIMPLE, "Simple" },
2524 { FF_PROFILE_RESERVED, "Reserved" },
2525 { FF_PROFILE_RESERVED, "Reserved" },
2529 AVCodec ff_mpeg1video_decoder = {
2532 CODEC_ID_MPEG1VIDEO,
2533 sizeof(Mpeg1Context),
2538 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
2541 .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2542 .update_thread_context= ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2545 AVCodec ff_mpeg2video_decoder = {
2548 CODEC_ID_MPEG2VIDEO,
2549 sizeof(Mpeg1Context),
2554 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
2557 .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2558 .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2562 AVCodec ff_mpegvideo_decoder = {
2565 CODEC_ID_MPEG2VIDEO,
2566 sizeof(Mpeg1Context),
2571 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
2574 .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2577 #if CONFIG_MPEG_XVMC_DECODER
2578 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx){
2579 if( avctx->active_thread_type & FF_THREAD_SLICE )
2581 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2583 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2584 av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2586 mpeg_decode_init(avctx);
2588 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2589 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2594 AVCodec ff_mpeg_xvmc_decoder = {
2597 CODEC_ID_MPEG2VIDEO_XVMC,
2598 sizeof(Mpeg1Context),
2599 mpeg_mc_decode_init,
2603 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2605 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2610 #if CONFIG_MPEG_VDPAU_DECODER
2611 AVCodec ff_mpeg_vdpau_decoder = {
2614 CODEC_ID_MPEG2VIDEO,
2615 sizeof(Mpeg1Context),
2620 CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2622 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2626 #if CONFIG_MPEG1_VDPAU_DECODER
2627 AVCodec ff_mpeg1_vdpau_decoder = {
2630 CODEC_ID_MPEG1VIDEO,
2631 sizeof(Mpeg1Context),
2636 CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2638 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),