1/* 2 * Copyright (c) 2002 The FFmpeg Project 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include "avcodec.h" 22#include "dsputil.h" 23#include "mpegvideo.h" 24#include "mathops.h" 25#include "msmpeg4.h" 26#include "msmpeg4data.h" 27#include "intrax8.h" 28#include "wmv2.h" 29 30 31static void parse_mb_skip(Wmv2Context * w){ 32 int mb_x, mb_y; 33 MpegEncContext * const s= &w->s; 34 uint32_t * const mb_type= s->current_picture_ptr->mb_type; 35 36 w->skip_type= get_bits(&s->gb, 2); 37 switch(w->skip_type){ 38 case SKIP_TYPE_NONE: 39 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 40 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 41 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0; 42 } 43 } 44 break; 45 case SKIP_TYPE_MPEG: 46 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 47 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 48 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 49 } 50 } 51 break; 52 case SKIP_TYPE_ROW: 53 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 54 if(get_bits1(&s->gb)){ 55 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 56 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; 57 } 58 }else{ 59 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 60 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 61 } 62 } 63 } 64 break; 65 case SKIP_TYPE_COL: 66 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 67 if(get_bits1(&s->gb)){ 68 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 69 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; 70 } 71 }else{ 72 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 73 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 74 } 75 } 76 } 77 break; 78 } 79} 80 81static int decode_ext_header(Wmv2Context *w){ 82 MpegEncContext * const s= &w->s; 83 GetBitContext gb; 84 int fps; 85 int code; 86 87 if(s->avctx->extradata_size<4) return -1; 88 89 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8); 90 91 fps = get_bits(&gb, 5); 92 s->bit_rate = get_bits(&gb, 11)*1024; 93 w->mspel_bit = get_bits1(&gb); 94 s->loop_filter = get_bits1(&gb); 95 w->abt_flag = get_bits1(&gb); 96 w->j_type_bit = get_bits1(&gb); 97 w->top_left_mv_flag= get_bits1(&gb); 98 w->per_mb_rl_bit = get_bits1(&gb); 99 code = get_bits(&gb, 3); 100 101 if(code==0) return -1; 102 103 s->slice_height = s->mb_height / code; 104 105 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 106 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, loop_filter:%d, slices:%d\n", 107 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, s->loop_filter, 108 code); 109 } 110 return 0; 111} 112 113int ff_wmv2_decode_picture_header(MpegEncContext * s) 114{ 115 Wmv2Context * const w= (Wmv2Context*)s; 116 int code; 117 118#if 0 119{ 120int i; 121for(i=0; i<s->gb.size*8; i++) 122 printf("%d", get_bits1(&s->gb)); 123// get_bits1(&s->gb); 124printf("END\n"); 125return -1; 126} 127#endif 128 if(s->picture_number==0) 129 decode_ext_header(w); 130 131 s->pict_type = get_bits1(&s->gb) + 1; 132 if(s->pict_type == FF_I_TYPE){ 133 code = get_bits(&s->gb, 7); 134 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); 135 } 136 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); 137 if(s->qscale <= 0) 138 return -1; 139 140 return 0; 141} 142 143int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s) 144{ 145 Wmv2Context * const w= (Wmv2Context*)s; 146 147 if (s->pict_type == FF_I_TYPE) { 148 if(w->j_type_bit) w->j_type= get_bits1(&s->gb); 149 else w->j_type= 0; //FIXME check 150 151 if(!w->j_type){ 152 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 153 else s->per_mb_rl_table= 0; 154 155 if(!s->per_mb_rl_table){ 156 s->rl_chroma_table_index = decode012(&s->gb); 157 s->rl_table_index = decode012(&s->gb); 158 } 159 160 s->dc_table_index = get_bits1(&s->gb); 161 } 162 s->inter_intra_pred= 0; 163 s->no_rounding = 1; 164 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 165 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", 166 s->qscale, 167 s->rl_chroma_table_index, 168 s->rl_table_index, 169 s->dc_table_index, 170 s->per_mb_rl_table, 171 w->j_type); 172 } 173 }else{ 174 int cbp_index; 175 w->j_type=0; 176 177 parse_mb_skip(w); 178 cbp_index= decode012(&s->gb); 179 if(s->qscale <= 10){ 180 int map[3]= {0,2,1}; 181 w->cbp_table_index= map[cbp_index]; 182 }else if(s->qscale <= 20){ 183 int map[3]= {1,0,2}; 184 w->cbp_table_index= map[cbp_index]; 185 }else{ 186 int map[3]= {2,1,0}; 187 w->cbp_table_index= map[cbp_index]; 188 } 189 190 if(w->mspel_bit) s->mspel= get_bits1(&s->gb); 191 else s->mspel= 0; //FIXME check 192 193 if(w->abt_flag){ 194 w->per_mb_abt= get_bits1(&s->gb)^1; 195 if(!w->per_mb_abt){ 196 w->abt_type= decode012(&s->gb); 197 } 198 } 199 200 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 201 else s->per_mb_rl_table= 0; 202 203 if(!s->per_mb_rl_table){ 204 s->rl_table_index = decode012(&s->gb); 205 s->rl_chroma_table_index = s->rl_table_index; 206 } 207 208 s->dc_table_index = get_bits1(&s->gb); 209 s->mv_table_index = get_bits1(&s->gb); 210 211 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); 212 s->no_rounding ^= 1; 213 214 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 215 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", 216 s->rl_table_index, 217 s->rl_chroma_table_index, 218 s->dc_table_index, 219 s->mv_table_index, 220 s->per_mb_rl_table, 221 s->qscale, 222 s->mspel, 223 w->per_mb_abt, 224 w->abt_type, 225 w->cbp_table_index, 226 s->inter_intra_pred); 227 } 228 } 229 s->esc3_level_length= 0; 230 s->esc3_run_length= 0; 231 232s->picture_number++; //FIXME ? 233 234 235 if(w->j_type){ 236 ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 ); 237 return 1; 238 } 239 240 return 0; 241} 242 243static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){ 244 MpegEncContext * const s= &w->s; 245 int ret; 246 247 ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); 248 249 if(ret<0) return -1; 250 251 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel) 252 w->hshift= get_bits1(&s->gb); 253 else 254 w->hshift= 0; 255 256//printf("%d %d ", *mx_ptr, *my_ptr); 257 258 return 0; 259} 260 261static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){ 262 MpegEncContext * const s= &w->s; 263 int xy, wrap, diff, type; 264 int16_t *A, *B, *C, *mot_val; 265 266 wrap = s->b8_stride; 267 xy = s->block_index[0]; 268 269 mot_val = s->current_picture.motion_val[0][xy]; 270 271 A = s->current_picture.motion_val[0][xy - 1]; 272 B = s->current_picture.motion_val[0][xy - wrap]; 273 C = s->current_picture.motion_val[0][xy + 2 - wrap]; 274 275 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) 276 diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); 277 else 278 diff=0; 279 280 if(diff >= 8) 281 type= get_bits1(&s->gb); 282 else 283 type= 2; 284 285 if(type == 0){ 286 *px= A[0]; 287 *py= A[1]; 288 }else if(type == 1){ 289 *px= B[0]; 290 *py= B[1]; 291 }else{ 292 /* special case for first (slice) line */ 293 if (s->first_slice_line) { 294 *px = A[0]; 295 *py = A[1]; 296 } else { 297 *px = mid_pred(A[0], B[0], C[0]); 298 *py = mid_pred(A[1], B[1], C[1]); 299 } 300 } 301 302 return mot_val; 303} 304 305static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){ 306 MpegEncContext * const s= &w->s; 307 static const int sub_cbp_table[3]= {2,3,1}; 308 int sub_cbp; 309 310 if(!cbp){ 311 s->block_last_index[n] = -1; 312 313 return 0; 314 } 315 316 if(w->per_block_abt) 317 w->abt_type= decode012(&s->gb); 318#if 0 319 if(w->per_block_abt) 320 printf("B%d", w->abt_type); 321#endif 322 w->abt_type_table[n]= w->abt_type; 323 324 if(w->abt_type){ 325// const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated; 326 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable; 327// const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; 328 329 sub_cbp= sub_cbp_table[ decode012(&s->gb) ]; 330// printf("S%d", sub_cbp); 331 332 if(sub_cbp&1){ 333 if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0) 334 return -1; 335 } 336 337 if(sub_cbp&2){ 338 if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0) 339 return -1; 340 } 341 s->block_last_index[n] = 63; 342 343 return 0; 344 }else{ 345 return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated); 346 } 347} 348 349 350int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) 351{ 352 Wmv2Context * const w= (Wmv2Context*)s; 353 int cbp, code, i; 354 uint8_t *coded_val; 355 356 if(w->j_type) return 0; 357 358 if (s->pict_type == FF_P_TYPE) { 359 if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){ 360 /* skip mb */ 361 s->mb_intra = 0; 362 for(i=0;i<6;i++) 363 s->block_last_index[i] = -1; 364 s->mv_dir = MV_DIR_FORWARD; 365 s->mv_type = MV_TYPE_16X16; 366 s->mv[0][0][0] = 0; 367 s->mv[0][0][1] = 0; 368 s->mb_skipped = 1; 369 w->hshift=0; 370 return 0; 371 } 372 373 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3); 374 if (code < 0) 375 return -1; 376 s->mb_intra = (~code & 0x40) >> 6; 377 378 cbp = code & 0x3f; 379 } else { 380 s->mb_intra = 1; 381 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); 382 if (code < 0){ 383 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); 384 return -1; 385 } 386 /* predict coded block pattern */ 387 cbp = 0; 388 for(i=0;i<6;i++) { 389 int val = ((code >> (5 - i)) & 1); 390 if (i < 4) { 391 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); 392 val = val ^ pred; 393 *coded_val = val; 394 } 395 cbp |= val << (5 - i); 396 } 397 } 398 399 if (!s->mb_intra) { 400 int mx, my; 401//printf("P at %d %d\n", s->mb_x, s->mb_y); 402 wmv2_pred_motion(w, &mx, &my); 403 404 if(cbp){ 405 s->dsp.clear_blocks(s->block[0]); 406 if(s->per_mb_rl_table){ 407 s->rl_table_index = decode012(&s->gb); 408 s->rl_chroma_table_index = s->rl_table_index; 409 } 410 411 if(w->abt_flag && w->per_mb_abt){ 412 w->per_block_abt= get_bits1(&s->gb); 413 if(!w->per_block_abt) 414 w->abt_type= decode012(&s->gb); 415 }else 416 w->per_block_abt=0; 417 } 418 419 if (wmv2_decode_motion(w, &mx, &my) < 0) 420 return -1; 421 422 s->mv_dir = MV_DIR_FORWARD; 423 s->mv_type = MV_TYPE_16X16; 424 s->mv[0][0][0] = mx; 425 s->mv[0][0][1] = my; 426 427 for (i = 0; i < 6; i++) { 428 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0) 429 { 430 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 431 return -1; 432 } 433 } 434 } else { 435//if(s->pict_type==FF_P_TYPE) 436// printf("%d%d ", s->inter_intra_pred, cbp); 437//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)); 438 s->ac_pred = get_bits1(&s->gb); 439 if(s->inter_intra_pred){ 440 s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); 441// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); 442 } 443 if(s->per_mb_rl_table && cbp){ 444 s->rl_table_index = decode012(&s->gb); 445 s->rl_chroma_table_index = s->rl_table_index; 446 } 447 448 s->dsp.clear_blocks(s->block[0]); 449 for (i = 0; i < 6; i++) { 450 if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) 451 { 452 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 453 return -1; 454 } 455 } 456 } 457 458 return 0; 459} 460 461static av_cold int wmv2_decode_init(AVCodecContext *avctx){ 462 Wmv2Context * const w= avctx->priv_data; 463 464 if(avctx->idct_algo==FF_IDCT_AUTO){ 465 avctx->idct_algo=FF_IDCT_WMV2; 466 } 467 468 if(ff_h263_decode_init(avctx) < 0) 469 return -1; 470 471 ff_wmv2_common_init(w); 472 473 ff_intrax8_common_init(&w->x8,&w->s); 474 475 return 0; 476} 477 478static av_cold int wmv2_decode_end(AVCodecContext *avctx) 479{ 480 Wmv2Context *w = avctx->priv_data; 481 482 ff_intrax8_common_end(&w->x8); 483 return ff_h263_decode_end(avctx); 484} 485 486AVCodec wmv2_decoder = { 487 "wmv2", 488 CODEC_TYPE_VIDEO, 489 CODEC_ID_WMV2, 490 sizeof(Wmv2Context), 491 wmv2_decode_init, 492 NULL, 493 wmv2_decode_end, 494 ff_h263_decode_frame, 495 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, 496 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), 497 .pix_fmts= ff_pixfmt_list_420, 498}; 499