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 "h263.h" 25#include "mathops.h" 26#include "msmpeg4.h" 27#include "msmpeg4data.h" 28#include "intrax8.h" 29#include "wmv2.h" 30 31 32static void parse_mb_skip(Wmv2Context * w){ 33 int mb_x, mb_y; 34 MpegEncContext * const s= &w->s; 35 uint32_t * const mb_type= s->current_picture_ptr->mb_type; 36 37 w->skip_type= get_bits(&s->gb, 2); 38 switch(w->skip_type){ 39 case SKIP_TYPE_NONE: 40 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 41 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 42 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0; 43 } 44 } 45 break; 46 case SKIP_TYPE_MPEG: 47 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 48 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 49 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 50 } 51 } 52 break; 53 case SKIP_TYPE_ROW: 54 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 55 if(get_bits1(&s->gb)){ 56 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 57 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; 58 } 59 }else{ 60 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 61 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 62 } 63 } 64 } 65 break; 66 case SKIP_TYPE_COL: 67 for(mb_x=0; mb_x<s->mb_width; mb_x++){ 68 if(get_bits1(&s->gb)){ 69 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 70 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; 71 } 72 }else{ 73 for(mb_y=0; mb_y<s->mb_height; mb_y++){ 74 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; 75 } 76 } 77 } 78 break; 79 } 80} 81 82static int decode_ext_header(Wmv2Context *w){ 83 MpegEncContext * const s= &w->s; 84 GetBitContext gb; 85 int fps; 86 int code; 87 88 if(s->avctx->extradata_size<4) return -1; 89 90 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8); 91 92 fps = get_bits(&gb, 5); 93 s->bit_rate = get_bits(&gb, 11)*1024; 94 w->mspel_bit = get_bits1(&gb); 95 s->loop_filter = get_bits1(&gb); 96 w->abt_flag = get_bits1(&gb); 97 w->j_type_bit = get_bits1(&gb); 98 w->top_left_mv_flag= get_bits1(&gb); 99 w->per_mb_rl_bit = get_bits1(&gb); 100 code = get_bits(&gb, 3); 101 102 if(code==0) return -1; 103 104 s->slice_height = s->mb_height / code; 105 106 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 107 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", 108 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, 109 code); 110 } 111 return 0; 112} 113 114int ff_wmv2_decode_picture_header(MpegEncContext * s) 115{ 116 Wmv2Context * const w= (Wmv2Context*)s; 117 int code; 118 119#if 0 120{ 121int i; 122for(i=0; i<s->gb.size*8; i++) 123 printf("%d", get_bits1(&s->gb)); 124// get_bits1(&s->gb); 125printf("END\n"); 126return -1; 127} 128#endif 129 if(s->picture_number==0) 130 decode_ext_header(w); 131 132 s->pict_type = get_bits1(&s->gb) + 1; 133 if(s->pict_type == FF_I_TYPE){ 134 code = get_bits(&s->gb, 7); 135 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); 136 } 137 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); 138 if(s->qscale <= 0) 139 return -1; 140 141 return 0; 142} 143 144int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s) 145{ 146 Wmv2Context * const w= (Wmv2Context*)s; 147 148 if (s->pict_type == FF_I_TYPE) { 149 if(w->j_type_bit) w->j_type= get_bits1(&s->gb); 150 else w->j_type= 0; //FIXME check 151 152 if(!w->j_type){ 153 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 154 else s->per_mb_rl_table= 0; 155 156 if(!s->per_mb_rl_table){ 157 s->rl_chroma_table_index = decode012(&s->gb); 158 s->rl_table_index = decode012(&s->gb); 159 } 160 161 s->dc_table_index = get_bits1(&s->gb); 162 } 163 s->inter_intra_pred= 0; 164 s->no_rounding = 1; 165 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 166 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", 167 s->qscale, 168 s->rl_chroma_table_index, 169 s->rl_table_index, 170 s->dc_table_index, 171 s->per_mb_rl_table, 172 w->j_type); 173 } 174 }else{ 175 int cbp_index; 176 w->j_type=0; 177 178 parse_mb_skip(w); 179 cbp_index= decode012(&s->gb); 180 if(s->qscale <= 10){ 181 int map[3]= {0,2,1}; 182 w->cbp_table_index= map[cbp_index]; 183 }else if(s->qscale <= 20){ 184 int map[3]= {1,0,2}; 185 w->cbp_table_index= map[cbp_index]; 186 }else{ 187 int map[3]= {2,1,0}; 188 w->cbp_table_index= map[cbp_index]; 189 } 190 191 if(w->mspel_bit) s->mspel= get_bits1(&s->gb); 192 else s->mspel= 0; //FIXME check 193 194 if(w->abt_flag){ 195 w->per_mb_abt= get_bits1(&s->gb)^1; 196 if(!w->per_mb_abt){ 197 w->abt_type= decode012(&s->gb); 198 } 199 } 200 201 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 202 else s->per_mb_rl_table= 0; 203 204 if(!s->per_mb_rl_table){ 205 s->rl_table_index = decode012(&s->gb); 206 s->rl_chroma_table_index = s->rl_table_index; 207 } 208 209 s->dc_table_index = get_bits1(&s->gb); 210 s->mv_table_index = get_bits1(&s->gb); 211 212 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); 213 s->no_rounding ^= 1; 214 215 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 216 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", 217 s->rl_table_index, 218 s->rl_chroma_table_index, 219 s->dc_table_index, 220 s->mv_table_index, 221 s->per_mb_rl_table, 222 s->qscale, 223 s->mspel, 224 w->per_mb_abt, 225 w->abt_type, 226 w->cbp_table_index, 227 s->inter_intra_pred); 228 } 229 } 230 s->esc3_level_length= 0; 231 s->esc3_run_length= 0; 232 233s->picture_number++; //FIXME ? 234 235 236 if(w->j_type){ 237 ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 ); 238 return 1; 239 } 240 241 return 0; 242} 243 244static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){ 245 MpegEncContext * const s= &w->s; 246 int ret; 247 248 ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); 249 250 if(ret<0) return -1; 251 252 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel) 253 w->hshift= get_bits1(&s->gb); 254 else 255 w->hshift= 0; 256 257//printf("%d %d ", *mx_ptr, *my_ptr); 258 259 return 0; 260} 261 262static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){ 263 MpegEncContext * const s= &w->s; 264 int xy, wrap, diff, type; 265 int16_t *A, *B, *C, *mot_val; 266 267 wrap = s->b8_stride; 268 xy = s->block_index[0]; 269 270 mot_val = s->current_picture.motion_val[0][xy]; 271 272 A = s->current_picture.motion_val[0][xy - 1]; 273 B = s->current_picture.motion_val[0][xy - wrap]; 274 C = s->current_picture.motion_val[0][xy + 2 - wrap]; 275 276 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) 277 diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); 278 else 279 diff=0; 280 281 if(diff >= 8) 282 type= get_bits1(&s->gb); 283 else 284 type= 2; 285 286 if(type == 0){ 287 *px= A[0]; 288 *py= A[1]; 289 }else if(type == 1){ 290 *px= B[0]; 291 *py= B[1]; 292 }else{ 293 /* special case for first (slice) line */ 294 if (s->first_slice_line) { 295 *px = A[0]; 296 *py = A[1]; 297 } else { 298 *px = mid_pred(A[0], B[0], C[0]); 299 *py = mid_pred(A[1], B[1], C[1]); 300 } 301 } 302 303 return mot_val; 304} 305 306static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){ 307 MpegEncContext * const s= &w->s; 308 static const int sub_cbp_table[3]= {2,3,1}; 309 int sub_cbp; 310 311 if(!cbp){ 312 s->block_last_index[n] = -1; 313 314 return 0; 315 } 316 317 if(w->per_block_abt) 318 w->abt_type= decode012(&s->gb); 319#if 0 320 if(w->per_block_abt) 321 printf("B%d", w->abt_type); 322#endif 323 w->abt_type_table[n]= w->abt_type; 324 325 if(w->abt_type){ 326// const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated; 327 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable; 328// const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; 329 330 sub_cbp= sub_cbp_table[ decode012(&s->gb) ]; 331// printf("S%d", sub_cbp); 332 333 if(sub_cbp&1){ 334 if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0) 335 return -1; 336 } 337 338 if(sub_cbp&2){ 339 if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0) 340 return -1; 341 } 342 s->block_last_index[n] = 63; 343 344 return 0; 345 }else{ 346 return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated); 347 } 348} 349 350 351int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) 352{ 353 Wmv2Context * const w= (Wmv2Context*)s; 354 int cbp, code, i; 355 uint8_t *coded_val; 356 357 if(w->j_type) return 0; 358 359 if (s->pict_type == FF_P_TYPE) { 360 if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){ 361 /* skip mb */ 362 s->mb_intra = 0; 363 for(i=0;i<6;i++) 364 s->block_last_index[i] = -1; 365 s->mv_dir = MV_DIR_FORWARD; 366 s->mv_type = MV_TYPE_16X16; 367 s->mv[0][0][0] = 0; 368 s->mv[0][0][1] = 0; 369 s->mb_skipped = 1; 370 w->hshift=0; 371 return 0; 372 } 373 374 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3); 375 if (code < 0) 376 return -1; 377 s->mb_intra = (~code & 0x40) >> 6; 378 379 cbp = code & 0x3f; 380 } else { 381 s->mb_intra = 1; 382 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); 383 if (code < 0){ 384 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); 385 return -1; 386 } 387 /* predict coded block pattern */ 388 cbp = 0; 389 for(i=0;i<6;i++) { 390 int val = ((code >> (5 - i)) & 1); 391 if (i < 4) { 392 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); 393 val = val ^ pred; 394 *coded_val = val; 395 } 396 cbp |= val << (5 - i); 397 } 398 } 399 400 if (!s->mb_intra) { 401 int mx, my; 402//printf("P at %d %d\n", s->mb_x, s->mb_y); 403 wmv2_pred_motion(w, &mx, &my); 404 405 if(cbp){ 406 s->dsp.clear_blocks(s->block[0]); 407 if(s->per_mb_rl_table){ 408 s->rl_table_index = decode012(&s->gb); 409 s->rl_chroma_table_index = s->rl_table_index; 410 } 411 412 if(w->abt_flag && w->per_mb_abt){ 413 w->per_block_abt= get_bits1(&s->gb); 414 if(!w->per_block_abt) 415 w->abt_type= decode012(&s->gb); 416 }else 417 w->per_block_abt=0; 418 } 419 420 if (wmv2_decode_motion(w, &mx, &my) < 0) 421 return -1; 422 423 s->mv_dir = MV_DIR_FORWARD; 424 s->mv_type = MV_TYPE_16X16; 425 s->mv[0][0][0] = mx; 426 s->mv[0][0][1] = my; 427 428 for (i = 0; i < 6; i++) { 429 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0) 430 { 431 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 432 return -1; 433 } 434 } 435 } else { 436//if(s->pict_type==FF_P_TYPE) 437// printf("%d%d ", s->inter_intra_pred, cbp); 438//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)); 439 s->ac_pred = get_bits1(&s->gb); 440 if(s->inter_intra_pred){ 441 s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); 442// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); 443 } 444 if(s->per_mb_rl_table && cbp){ 445 s->rl_table_index = decode012(&s->gb); 446 s->rl_chroma_table_index = s->rl_table_index; 447 } 448 449 s->dsp.clear_blocks(s->block[0]); 450 for (i = 0; i < 6; i++) { 451 if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) 452 { 453 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 454 return -1; 455 } 456 } 457 } 458 459 return 0; 460} 461 462static av_cold int wmv2_decode_init(AVCodecContext *avctx){ 463 Wmv2Context * const w= avctx->priv_data; 464 465 if(avctx->idct_algo==FF_IDCT_AUTO){ 466 avctx->idct_algo=FF_IDCT_WMV2; 467 } 468 469 if(ff_msmpeg4_decode_init(avctx) < 0) 470 return -1; 471 472 ff_wmv2_common_init(w); 473 474 ff_intrax8_common_init(&w->x8,&w->s); 475 476 return 0; 477} 478 479static av_cold int wmv2_decode_end(AVCodecContext *avctx) 480{ 481 Wmv2Context *w = avctx->priv_data; 482 483 ff_intrax8_common_end(&w->x8); 484 return ff_h263_decode_end(avctx); 485} 486 487AVCodec wmv2_decoder = { 488 "wmv2", 489 AVMEDIA_TYPE_VIDEO, 490 CODEC_ID_WMV2, 491 sizeof(Wmv2Context), 492 wmv2_decode_init, 493 NULL, 494 wmv2_decode_end, 495 ff_h263_decode_frame, 496 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, 497 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), 498 .pix_fmts= ff_pixfmt_list_420, 499}; 500