quicktime/ffmpeg/libavcodec/wmv2.c

   1 /*
   2  * Copyright (c) 2002 The FFmpeg Project.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20 /**
  21  * @file wmv2.c
  22  * wmv2 codec.
  23  */
  24
  25 #include "simple_idct.h"
  26
  27 #define SKIP_TYPE_NONE 0
  28 #define SKIP_TYPE_MPEG 1
  29 #define SKIP_TYPE_ROW  2
  30 #define SKIP_TYPE_COL  3
  31
  32
  33 typedef struct Wmv2Context{
  34     MpegEncContext s;
  35     int j_type_bit;
  36     int j_type;
  37     int flag3;
  38     int flag63;
  39     int abt_flag;
  40     int abt_type;
  41     int abt_type_table[6];
  42     int per_mb_abt;
  43     int per_block_abt;
  44     int mspel_bit;
  45     int cbp_table_index;
  46     int top_left_mv_flag;
  47     int per_mb_rl_bit;
  48     int skip_type;
  49     int hshift;
  50
  51     ScanTable abt_scantable[2];
  52     DCTELEM abt_block2[6][64] __align8;
  53 }Wmv2Context;
  54
  55 static void wmv2_common_init(Wmv2Context * w){
  56     MpegEncContext * const s= &w->s;
  57
  58     ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
  59     ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
  60 }
  61
  62 #ifdef CONFIG_ENCODERS
  63
  64 static int encode_ext_header(Wmv2Context *w){
  65     MpegEncContext * const s= &w->s;
  66     PutBitContext pb;
  67     int code;
  68
  69     init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
  70
  71     put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
  72     put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
  73
  74     put_bits(&pb, 1, w->mspel_bit=1);
  75     put_bits(&pb, 1, w->flag3=1);
  76     put_bits(&pb, 1, w->abt_flag=1);
  77     put_bits(&pb, 1, w->j_type_bit=1);
  78     put_bits(&pb, 1, w->top_left_mv_flag=0);
  79     put_bits(&pb, 1, w->per_mb_rl_bit=1);
  80     put_bits(&pb, 3, code=1);
  81
  82     flush_put_bits(&pb);
  83
  84     s->slice_height = s->mb_height / code;
  85
  86     return 0;
  87 }
  88
  89 static int wmv2_encode_init(AVCodecContext *avctx){
  90     Wmv2Context * const w= avctx->priv_data;
  91
  92     if(MPV_encode_init(avctx) < 0)
  93         return -1;
  94
  95     wmv2_common_init(w);
  96
  97     avctx->extradata_size= 4;
  98     avctx->extradata= av_mallocz(avctx->extradata_size + 10);
  99     encode_ext_header(w);
 100
 101     return 0;
 102 }
 103
 104 #if 0 /* unused, remove? */
 105 static int wmv2_encode_end(AVCodecContext *avctx){
 106
 107     if(MPV_encode_end(avctx) < 0)
 108         return -1;
 109
 110     avctx->extradata_size= 0;
 111     av_freep(&avctx->extradata);
 112
 113     return 0;
 114 }
 115 #endif
 116
 117 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
 118 {
 119     Wmv2Context * const w= (Wmv2Context*)s;
 120
 121     put_bits(&s->pb, 1, s->pict_type - 1);
 122     if(s->pict_type == I_TYPE){
 123         put_bits(&s->pb, 7, 0);
 124     }
 125     put_bits(&s->pb, 5, s->qscale);
 126
 127     s->dc_table_index = 1;
 128     s->mv_table_index = 1; /* only if P frame */
 129 //    s->use_skip_mb_code = 1; /* only if P frame */
 130     s->per_mb_rl_table = 0;
 131     s->mspel= 0;
 132     w->per_mb_abt=0;
 133     w->abt_type=0;
 134     w->j_type=0;
 135
 136     assert(s->flipflop_rounding);
 137
 138     if (s->pict_type == I_TYPE) {
 139         assert(s->no_rounding==1);
 140         if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
 141
 142         if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
 143
 144         if(!s->per_mb_rl_table){
 145             code012(&s->pb, s->rl_chroma_table_index);
 146             code012(&s->pb, s->rl_table_index);
 147         }
 148
 149         put_bits(&s->pb, 1, s->dc_table_index);
 150
 151         s->inter_intra_pred= 0;
 152     }else{
 153         int cbp_index;
 154
 155         put_bits(&s->pb, 2, SKIP_TYPE_NONE);
 156
 157         code012(&s->pb, cbp_index=0);
 158         if(s->qscale <= 10){
 159             int map[3]= {0,2,1};
 160             w->cbp_table_index= map[cbp_index];
 161         }else if(s->qscale <= 20){
 162             int map[3]= {1,0,2};
 163             w->cbp_table_index= map[cbp_index];
 164         }else{
 165             int map[3]= {2,1,0};
 166             w->cbp_table_index= map[cbp_index];
 167         }
 168
 169         if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
 170
 171         if(w->abt_flag){
 172             put_bits(&s->pb, 1, w->per_mb_abt^1);
 173             if(!w->per_mb_abt){
 174                 code012(&s->pb, w->abt_type);
 175             }
 176         }
 177
 178         if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
 179
 180         if(!s->per_mb_rl_table){
 181             code012(&s->pb, s->rl_table_index);
 182             s->rl_chroma_table_index = s->rl_table_index;
 183         }
 184         put_bits(&s->pb, 1, s->dc_table_index);
 185         put_bits(&s->pb, 1, s->mv_table_index);
 186
 187         s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
 188     }
 189     s->esc3_level_length= 0;
 190     s->esc3_run_length= 0;
 191
 192     return 0;
 193 }
 194
 195 // nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
 196 // its duplicated here in case someone wants to add support for these carp features
 197 void ff_wmv2_encode_mb(MpegEncContext * s,
 198                        DCTELEM block[6][64],
 199                        int motion_x, int motion_y)
 200 {
 201     Wmv2Context * const w= (Wmv2Context*)s;
 202     int cbp, coded_cbp, i;
 203     int pred_x, pred_y;
 204     uint8_t *coded_block;
 205
 206     handle_slices(s);
 207
 208     if (!s->mb_intra) {
 209         /* compute cbp */
 210         set_stat(ST_INTER_MB);
 211         cbp = 0;
 212         for (i = 0; i < 6; i++) {
 213             if (s->block_last_index[i] >= 0)
 214                 cbp |= 1 << (5 - i);
 215         }
 216
 217         put_bits(&s->pb,
 218                  wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
 219                  wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
 220
 221         /* motion vector */
 222         h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
 223         msmpeg4_encode_motion(s, motion_x - pred_x,
 224                               motion_y - pred_y);
 225     } else {
 226         /* compute cbp */
 227         cbp = 0;
 228         coded_cbp = 0;
 229         for (i = 0; i < 6; i++) {
 230             int val, pred;
 231             val = (s->block_last_index[i] >= 1);
 232             cbp |= val << (5 - i);
 233             if (i < 4) {
 234                 /* predict value for close blocks only for luma */
 235                 pred = coded_block_pred(s, i, &coded_block);
 236                 *coded_block = val;
 237                 val = val ^ pred;
 238             }
 239             coded_cbp |= val << (5 - i);
 240         }
 241 #if 0
 242         if (coded_cbp)
 243             printf("cbp=%x %x\n", cbp, coded_cbp);
 244 #endif
 245
 246         if (s->pict_type == I_TYPE) {
 247             set_stat(ST_INTRA_MB);
 248             put_bits(&s->pb,
 249                      ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
 250         } else {
 251             put_bits(&s->pb,
 252                      wmv2_inter_table[w->cbp_table_index][cbp][1],
 253                      wmv2_inter_table[w->cbp_table_index][cbp][0]);
 254         }
 255         set_stat(ST_INTRA_MB);
 256         put_bits(&s->pb, 1, 0); /* no AC prediction yet */
 257         if(s->inter_intra_pred){
 258             s->h263_aic_dir=0;
 259             put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
 260         }
 261     }
 262
 263     for (i = 0; i < 6; i++) {
 264         msmpeg4_encode_block(s, block[i], i);
 265     }
 266 }
 267 #endif //CONFIG_ENCODERS
 268
 269 static void parse_mb_skip(Wmv2Context * w){
 270     int mb_x, mb_y;
 271     MpegEncContext * const s= &w->s;
 272     uint32_t * const mb_type= s->current_picture_ptr->mb_type;
 273
 274     w->skip_type= get_bits(&s->gb, 2);
 275     switch(w->skip_type){
 276     case SKIP_TYPE_NONE:
 277         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 278             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 279                 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
 280             }
 281         }
 282         break;
 283     case SKIP_TYPE_MPEG:
 284         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 285             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 286                 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
 287             }
 288         }
 289         break;
 290     case SKIP_TYPE_ROW:
 291         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 292             if(get_bits1(&s->gb)){
 293                 for(mb_x=0; mb_x<s->mb_width; mb_x++){
 294                     mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
 295                 }
 296             }else{
 297                 for(mb_x=0; mb_x<s->mb_width; mb_x++){
 298                     mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
 299                 }
 300             }
 301         }
 302         break;
 303     case SKIP_TYPE_COL:
 304         for(mb_x=0; mb_x<s->mb_width; mb_x++){
 305             if(get_bits1(&s->gb)){
 306                 for(mb_y=0; mb_y<s->mb_height; mb_y++){
 307                     mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
 308                 }
 309             }else{
 310                 for(mb_y=0; mb_y<s->mb_height; mb_y++){
 311                     mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
 312                 }
 313             }
 314         }
 315         break;
 316     }
 317 }
 318
 319 static int decode_ext_header(Wmv2Context *w){
 320     MpegEncContext * const s= &w->s;
 321     GetBitContext gb;
 322     int fps;
 323     int code;
 324
 325     if(s->avctx->extradata_size<4) return -1;
 326
 327     init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
 328
 329     fps                = get_bits(&gb, 5);
 330     s->bit_rate        = get_bits(&gb, 11)*1024;
 331     w->mspel_bit       = get_bits1(&gb);
 332     w->flag3           = get_bits1(&gb);
 333     w->abt_flag        = get_bits1(&gb);
 334     w->j_type_bit      = get_bits1(&gb);
 335     w->top_left_mv_flag= get_bits1(&gb);
 336     w->per_mb_rl_bit   = get_bits1(&gb);
 337     code               = get_bits(&gb, 3);
 338
 339     if(code==0) return -1;
 340
 341     s->slice_height = s->mb_height / code;
 342
 343     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
 344         av_log(s->avctx, AV_LOG_DEBUG, "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, tl_mv_flag:%d, mbrl_bit:%d, code:%d, flag3:%d, slices:%d\n",
 345         fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, w->top_left_mv_flag, w->per_mb_rl_bit, code, w->flag3,
 346         code);
 347     }
 348     return 0;
 349 }
 350
 351 int ff_wmv2_decode_picture_header(MpegEncContext * s)
 352 {
 353     Wmv2Context * const w= (Wmv2Context*)s;
 354     int code;
 355
 356 #if 0
 357 {
 358 int i;
 359 for(i=0; i<s->gb.size*8; i++)
 360     printf("%d", get_bits1(&s->gb));
 361 //    get_bits1(&s->gb);
 362 printf("END\n");
 363 return -1;
 364 }
 365 #endif
 366     if(s->picture_number==0)
 367         decode_ext_header(w);
 368
 369     s->pict_type = get_bits(&s->gb, 1) + 1;
 370     if(s->pict_type == I_TYPE){
 371         code = get_bits(&s->gb, 7);
 372         av_log(s->avctx, AV_LOG_ERROR, "I7:%X/\n", code);
 373     }
 374     s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
 375     if(s->qscale < 0)
 376        return -1;
 377
 378     return 0;
 379 }
 380
 381 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
 382 {
 383     Wmv2Context * const w= (Wmv2Context*)s;
 384
 385     if (s->pict_type == I_TYPE) {
 386         if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
 387         else              w->j_type= 0; //FIXME check
 388
 389         if(!w->j_type){
 390             if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
 391             else                 s->per_mb_rl_table= 0;
 392
 393             if(!s->per_mb_rl_table){
 394                 s->rl_chroma_table_index = decode012(&s->gb);
 395                 s->rl_table_index = decode012(&s->gb);
 396             }
 397
 398             s->dc_table_index = get_bits1(&s->gb);
 399         }
 400         s->inter_intra_pred= 0;
 401         s->no_rounding = 1;
 402         if(s->avctx->debug&FF_DEBUG_PICT_INFO){
 403             av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
 404                 s->qscale,
 405                 s->rl_chroma_table_index,
 406                 s->rl_table_index,
 407                 s->dc_table_index,
 408                 s->per_mb_rl_table,
 409                 w->j_type);
 410         }
 411     }else{
 412         int cbp_index;
 413         w->j_type=0;
 414
 415         parse_mb_skip(w);
 416         cbp_index= decode012(&s->gb);
 417         if(s->qscale <= 10){
 418             int map[3]= {0,2,1};
 419             w->cbp_table_index= map[cbp_index];
 420         }else if(s->qscale <= 20){
 421             int map[3]= {1,0,2};
 422             w->cbp_table_index= map[cbp_index];
 423         }else{
 424             int map[3]= {2,1,0};
 425             w->cbp_table_index= map[cbp_index];
 426         }
 427
 428         if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
 429         else             s->mspel= 0; //FIXME check
 430
 431         if(w->abt_flag){
 432             w->per_mb_abt= get_bits1(&s->gb)^1;
 433             if(!w->per_mb_abt){
 434                 w->abt_type= decode012(&s->gb);
 435             }
 436         }
 437
 438         if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
 439         else                 s->per_mb_rl_table= 0;
 440
 441         if(!s->per_mb_rl_table){
 442             s->rl_table_index = decode012(&s->gb);
 443             s->rl_chroma_table_index = s->rl_table_index;
 444         }
 445
 446         s->dc_table_index = get_bits1(&s->gb);
 447         s->mv_table_index = get_bits1(&s->gb);
 448
 449         s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
 450         s->no_rounding ^= 1;
 451
 452         if(s->avctx->debug&FF_DEBUG_PICT_INFO){
 453             av_log(s->avctx, AV_LOG_DEBUG, "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
 454                 s->rl_table_index,
 455                 s->rl_chroma_table_index,
 456                 s->dc_table_index,
 457                 s->mv_table_index,
 458                 s->per_mb_rl_table,
 459                 s->qscale,
 460                 s->mspel,
 461                 w->per_mb_abt,
 462                 w->abt_type,
 463                 w->cbp_table_index,
 464                 s->inter_intra_pred);
 465         }
 466     }
 467     s->esc3_level_length= 0;
 468     s->esc3_run_length= 0;
 469
 470 s->picture_number++; //FIXME ?
 471
 472
 473 //    if(w->j_type)
 474 //        return wmv2_decode_j_picture(w); //FIXME
 475
 476     if(w->j_type){
 477         av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
 478         return -1;
 479     }
 480
 481     return 0;
 482 }
 483
 484 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
 485     MpegEncContext * const s= &w->s;
 486     int ret;
 487
 488     ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
 489
 490     if(ret<0) return -1;
 491
 492     if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
 493         w->hshift= get_bits1(&s->gb);
 494     else
 495         w->hshift= 0;
 496
 497 //printf("%d %d  ", *mx_ptr, *my_ptr);
 498
 499     return 0;
 500 }
 501
 502 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
 503     MpegEncContext * const s= &w->s;
 504     int xy, wrap, diff, type;
 505     int16_t *A, *B, *C, *mot_val;
 506
 507     wrap = s->b8_stride;
 508     xy = s->block_index[0];
 509
 510     mot_val = s->current_picture.motion_val[0][xy];
 511
 512     A = s->current_picture.motion_val[0][xy - 1];
 513     B = s->current_picture.motion_val[0][xy - wrap];
 514     C = s->current_picture.motion_val[0][xy + 2 - wrap];
 515
 516     diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
 517
 518     if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag && diff >= 8)
 519         type= get_bits1(&s->gb);
 520     else
 521         type= 2;
 522
 523     if(type == 0){
 524         *px= A[0];
 525         *py= A[1];
 526     }else if(type == 1){
 527         *px= B[0];
 528         *py= B[1];
 529     }else{
 530         /* special case for first (slice) line */
 531         if (s->first_slice_line) {
 532             *px = A[0];
 533             *py = A[1];
 534         } else {
 535             *px = mid_pred(A[0], B[0], C[0]);
 536             *py = mid_pred(A[1], B[1], C[1]);
 537         }
 538     }
 539
 540     return mot_val;
 541 }
 542
 543 static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
 544     MpegEncContext * const s= &w->s;
 545     static const int sub_cbp_table[3]= {2,3,1};
 546     int sub_cbp;
 547
 548     if(!cbp){
 549         s->block_last_index[n] = -1;
 550
 551         return 0;
 552     }
 553
 554     if(w->per_block_abt)
 555         w->abt_type= decode012(&s->gb);
 556 #if 0
 557     if(w->per_block_abt)
 558         printf("B%d", w->abt_type);
 559 #endif
 560     w->abt_type_table[n]= w->abt_type;
 561
 562     if(w->abt_type){
 563 //        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
 564         const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
 565 //        const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
 566
 567         sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
 568 //        printf("S%d", sub_cbp);
 569
 570         if(sub_cbp&1){
 571             if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
 572                 return -1;
 573         }
 574
 575         if(sub_cbp&2){
 576             if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
 577                 return -1;
 578         }
 579         s->block_last_index[n] = 63;
 580
 581         return 0;
 582     }else{
 583         return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
 584     }
 585 }
 586
 587 static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
 588     MpegEncContext * const s= &w->s;
 589
 590   if (s->block_last_index[n] >= 0) {
 591     switch(w->abt_type_table[n]){
 592     case 0:
 593         s->dsp.idct_add (dst, stride, block1);
 594         break;
 595     case 1:
 596         simple_idct84_add(dst           , stride, block1);
 597         simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
 598         memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
 599         break;
 600     case 2:
 601         simple_idct48_add(dst           , stride, block1);
 602         simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);
 603         memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
 604         break;
 605     default:
 606         av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
 607     }
 608   }
 609 }
 610
 611 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
 612     Wmv2Context * const w= (Wmv2Context*)s;
 613
 614     wmv2_add_block(w, block1[0], dest_y                    , s->linesize, 0);
 615     wmv2_add_block(w, block1[1], dest_y + 8                , s->linesize, 1);
 616     wmv2_add_block(w, block1[2], dest_y +     8*s->linesize, s->linesize, 2);
 617     wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
 618
 619     if(s->flags&CODEC_FLAG_GRAY) return;
 620
 621     wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
 622     wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
 623 }
 624
 625 void ff_mspel_motion(MpegEncContext *s,
 626                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 627                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 628                                int motion_x, int motion_y, int h)
 629 {
 630     Wmv2Context * const w= (Wmv2Context*)s;
 631     uint8_t *ptr;
 632     int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
 633     int emu=0;
 634
 635     dxy = ((motion_y & 1) << 1) | (motion_x & 1);
 636     dxy = 2*dxy + w->hshift;
 637     src_x = s->mb_x * 16 + (motion_x >> 1);
 638     src_y = s->mb_y * 16 + (motion_y >> 1);
 639
 640     /* WARNING: do no forget half pels */
 641     v_edge_pos = s->v_edge_pos;
 642     src_x = clip(src_x, -16, s->width);
 643     src_y = clip(src_y, -16, s->height);
 644     linesize   = s->linesize;
 645     uvlinesize = s->uvlinesize;
 646     ptr = ref_picture[0] + (src_y * linesize) + src_x;
 647
 648     if(s->flags&CODEC_FLAG_EMU_EDGE){
 649         if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos
 650                               || src_y + h+1 >= v_edge_pos){
 651             ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
 652                              src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
 653             ptr= s->edge_emu_buffer + 1 + s->linesize;
 654             emu=1;
 655         }
 656     }
 657
 658     s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);
 659     s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);
 660     s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);
 661     s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
 662
 663     if(s->flags&CODEC_FLAG_GRAY) return;
 664
 665     if (s->out_format == FMT_H263) {
 666         dxy = 0;
 667         if ((motion_x & 3) != 0)
 668             dxy |= 1;
 669         if ((motion_y & 3) != 0)
 670             dxy |= 2;
 671         mx = motion_x >> 2;
 672         my = motion_y >> 2;
 673     } else {
 674         mx = motion_x / 2;
 675         my = motion_y / 2;
 676         dxy = ((my & 1) << 1) | (mx & 1);
 677         mx >>= 1;
 678         my >>= 1;
 679     }
 680
 681     src_x = s->mb_x * 8 + mx;
 682     src_y = s->mb_y * 8 + my;
 683     src_x = clip(src_x, -8, s->width >> 1);
 684     if (src_x == (s->width >> 1))
 685         dxy &= ~1;
 686     src_y = clip(src_y, -8, s->height >> 1);
 687     if (src_y == (s->height >> 1))
 688         dxy &= ~2;
 689     offset = (src_y * uvlinesize) + src_x;
 690     ptr = ref_picture[1] + offset;
 691     if(emu){
 692         ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
 693                          src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
 694         ptr= s->edge_emu_buffer;
 695     }
 696     pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
 697
 698     ptr = ref_picture[2] + offset;
 699     if(emu){
 700         ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
 701                          src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
 702         ptr= s->edge_emu_buffer;
 703     }
 704     pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
 705 }
 706
 707
 708 static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
 709 {
 710     Wmv2Context * const w= (Wmv2Context*)s;
 711     int cbp, code, i;
 712     uint8_t *coded_val;
 713
 714     if(w->j_type) return 0;
 715
 716     if (s->pict_type == P_TYPE) {
 717         if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
 718             /* skip mb */
 719             s->mb_intra = 0;
 720             for(i=0;i<6;i++)
 721                 s->block_last_index[i] = -1;
 722             s->mv_dir = MV_DIR_FORWARD;
 723             s->mv_type = MV_TYPE_16X16;
 724             s->mv[0][0][0] = 0;
 725             s->mv[0][0][1] = 0;
 726             s->mb_skipped = 1;
 727             w->hshift=0;
 728             return 0;
 729         }
 730
 731         code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
 732         if (code < 0)
 733             return -1;
 734         s->mb_intra = (~code & 0x40) >> 6;
 735
 736         cbp = code & 0x3f;
 737     } else {
 738         s->mb_intra = 1;
 739         code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
 740         if (code < 0){
 741             av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
 742             return -1;
 743         }
 744         /* predict coded block pattern */
 745         cbp = 0;
 746         for(i=0;i<6;i++) {
 747             int val = ((code >> (5 - i)) & 1);
 748             if (i < 4) {
 749                 int pred = coded_block_pred(s, i, &coded_val);
 750                 val = val ^ pred;
 751                 *coded_val = val;
 752             }
 753             cbp |= val << (5 - i);
 754         }
 755     }
 756
 757     if (!s->mb_intra) {
 758         int mx, my;
 759 //printf("P at %d %d\n", s->mb_x, s->mb_y);
 760         wmv2_pred_motion(w, &mx, &my);
 761
 762         if(cbp){
 763             s->dsp.clear_blocks(s->block[0]);
 764             if(s->per_mb_rl_table){
 765                 s->rl_table_index = decode012(&s->gb);
 766                 s->rl_chroma_table_index = s->rl_table_index;
 767             }
 768
 769             if(w->abt_flag && w->per_mb_abt){
 770                 w->per_block_abt= get_bits1(&s->gb);
 771                 if(!w->per_block_abt)
 772                     w->abt_type= decode012(&s->gb);
 773             }else
 774                 w->per_block_abt=0;
 775         }
 776
 777         if (wmv2_decode_motion(w, &mx, &my) < 0)
 778             return -1;
 779
 780         s->mv_dir = MV_DIR_FORWARD;
 781         s->mv_type = MV_TYPE_16X16;
 782         s->mv[0][0][0] = mx;
 783         s->mv[0][0][1] = my;
 784
 785         for (i = 0; i < 6; i++) {
 786             if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
 787             {
 788                 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
 789                 return -1;
 790             }
 791         }
 792     } else {
 793 //if(s->pict_type==P_TYPE)
 794 //   printf("%d%d ", s->inter_intra_pred, cbp);
 795 //printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
 796         s->ac_pred = get_bits1(&s->gb);
 797         if(s->inter_intra_pred){
 798             s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
 799 //            printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
 800         }
 801         if(s->per_mb_rl_table && cbp){
 802             s->rl_table_index = decode012(&s->gb);
 803             s->rl_chroma_table_index = s->rl_table_index;
 804         }
 805
 806         s->dsp.clear_blocks(s->block[0]);
 807         for (i = 0; i < 6; i++) {
 808             if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
 809             {
 810                 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
 811                 return -1;
 812             }
 813         }
 814     }
 815
 816     return 0;
 817 }
 818
 819 static int wmv2_decode_init(AVCodecContext *avctx){
 820     Wmv2Context * const w= avctx->priv_data;
 821
 822     if(ff_h263_decode_init(avctx) < 0)
 823         return -1;
 824
 825     wmv2_common_init(w);
 826
 827     return 0;
 828 }
 829
 830 AVCodec wmv2_decoder = {
 831     "wmv2",
 832     CODEC_TYPE_VIDEO,
 833     CODEC_ID_WMV2,
 834     sizeof(Wmv2Context),
 835     wmv2_decode_init,
 836     NULL,
 837     ff_h263_decode_end,
 838     ff_h263_decode_frame,
 839     CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
 840 };
 841
 842 #ifdef CONFIG_ENCODERS
 843 AVCodec wmv2_encoder = {
 844     "wmv2",
 845     CODEC_TYPE_VIDEO,
 846     CODEC_ID_WMV2,
 847     sizeof(Wmv2Context),
 848     wmv2_encode_init,
 849     MPV_encode_picture,
 850     MPV_encode_end,
 851 };
 852 #endif