1/* 2 * Copyright (c) 2002 The Libav Project 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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->f.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, 32); 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(s->picture_number==0) 120 decode_ext_header(w); 121 122 s->pict_type = get_bits1(&s->gb) + 1; 123 if(s->pict_type == AV_PICTURE_TYPE_I){ 124 code = get_bits(&s->gb, 7); 125 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); 126 } 127 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); 128 if(s->qscale <= 0) 129 return -1; 130 131 return 0; 132} 133 134int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s) 135{ 136 Wmv2Context * const w= (Wmv2Context*)s; 137 138 if (s->pict_type == AV_PICTURE_TYPE_I) { 139 if(w->j_type_bit) w->j_type= get_bits1(&s->gb); 140 else w->j_type= 0; //FIXME check 141 142 if(!w->j_type){ 143 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 144 else s->per_mb_rl_table= 0; 145 146 if(!s->per_mb_rl_table){ 147 s->rl_chroma_table_index = decode012(&s->gb); 148 s->rl_table_index = decode012(&s->gb); 149 } 150 151 s->dc_table_index = get_bits1(&s->gb); 152 } 153 s->inter_intra_pred= 0; 154 s->no_rounding = 1; 155 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 156 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", 157 s->qscale, 158 s->rl_chroma_table_index, 159 s->rl_table_index, 160 s->dc_table_index, 161 s->per_mb_rl_table, 162 w->j_type); 163 } 164 }else{ 165 int cbp_index; 166 w->j_type=0; 167 168 parse_mb_skip(w); 169 cbp_index= decode012(&s->gb); 170 if(s->qscale <= 10){ 171 int map[3]= {0,2,1}; 172 w->cbp_table_index= map[cbp_index]; 173 }else if(s->qscale <= 20){ 174 int map[3]= {1,0,2}; 175 w->cbp_table_index= map[cbp_index]; 176 }else{ 177 int map[3]= {2,1,0}; 178 w->cbp_table_index= map[cbp_index]; 179 } 180 181 if(w->mspel_bit) s->mspel= get_bits1(&s->gb); 182 else s->mspel= 0; //FIXME check 183 184 if(w->abt_flag){ 185 w->per_mb_abt= get_bits1(&s->gb)^1; 186 if(!w->per_mb_abt){ 187 w->abt_type= decode012(&s->gb); 188 } 189 } 190 191 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb); 192 else s->per_mb_rl_table= 0; 193 194 if(!s->per_mb_rl_table){ 195 s->rl_table_index = decode012(&s->gb); 196 s->rl_chroma_table_index = s->rl_table_index; 197 } 198 199 s->dc_table_index = get_bits1(&s->gb); 200 s->mv_table_index = get_bits1(&s->gb); 201 202 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); 203 s->no_rounding ^= 1; 204 205 if(s->avctx->debug&FF_DEBUG_PICT_INFO){ 206 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", 207 s->rl_table_index, 208 s->rl_chroma_table_index, 209 s->dc_table_index, 210 s->mv_table_index, 211 s->per_mb_rl_table, 212 s->qscale, 213 s->mspel, 214 w->per_mb_abt, 215 w->abt_type, 216 w->cbp_table_index, 217 s->inter_intra_pred); 218 } 219 } 220 s->esc3_level_length= 0; 221 s->esc3_run_length= 0; 222 223s->picture_number++; //FIXME ? 224 225 226 if(w->j_type){ 227 ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 ); 228 return 1; 229 } 230 231 return 0; 232} 233 234static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){ 235 MpegEncContext * const s= &w->s; 236 int ret; 237 238 ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); 239 240 if(ret<0) return -1; 241 242 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel) 243 w->hshift= get_bits1(&s->gb); 244 else 245 w->hshift= 0; 246 247//printf("%d %d ", *mx_ptr, *my_ptr); 248 249 return 0; 250} 251 252static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){ 253 MpegEncContext * const s= &w->s; 254 int xy, wrap, diff, type; 255 int16_t *A, *B, *C, *mot_val; 256 257 wrap = s->b8_stride; 258 xy = s->block_index[0]; 259 260 mot_val = s->current_picture.f.motion_val[0][xy]; 261 262 A = s->current_picture.f.motion_val[0][xy - 1]; 263 B = s->current_picture.f.motion_val[0][xy - wrap]; 264 C = s->current_picture.f.motion_val[0][xy + 2 - wrap]; 265 266 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) 267 diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); 268 else 269 diff=0; 270 271 if(diff >= 8) 272 type= get_bits1(&s->gb); 273 else 274 type= 2; 275 276 if(type == 0){ 277 *px= A[0]; 278 *py= A[1]; 279 }else if(type == 1){ 280 *px= B[0]; 281 *py= B[1]; 282 }else{ 283 /* special case for first (slice) line */ 284 if (s->first_slice_line) { 285 *px = A[0]; 286 *py = A[1]; 287 } else { 288 *px = mid_pred(A[0], B[0], C[0]); 289 *py = mid_pred(A[1], B[1], C[1]); 290 } 291 } 292 293 return mot_val; 294} 295 296static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){ 297 MpegEncContext * const s= &w->s; 298 static const int sub_cbp_table[3]= {2,3,1}; 299 int sub_cbp; 300 301 if(!cbp){ 302 s->block_last_index[n] = -1; 303 304 return 0; 305 } 306 307 if(w->per_block_abt) 308 w->abt_type= decode012(&s->gb); 309 w->abt_type_table[n]= w->abt_type; 310 311 if(w->abt_type){ 312// const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated; 313 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable; 314// const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; 315 316 sub_cbp= sub_cbp_table[ decode012(&s->gb) ]; 317// printf("S%d", sub_cbp); 318 319 if(sub_cbp&1){ 320 if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0) 321 return -1; 322 } 323 324 if(sub_cbp&2){ 325 if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0) 326 return -1; 327 } 328 s->block_last_index[n] = 63; 329 330 return 0; 331 }else{ 332 return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated); 333 } 334} 335 336 337int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) 338{ 339 Wmv2Context * const w= (Wmv2Context*)s; 340 int cbp, code, i; 341 uint8_t *coded_val; 342 343 if(w->j_type) return 0; 344 345 if (s->pict_type == AV_PICTURE_TYPE_P) { 346 if (IS_SKIP(s->current_picture.f.mb_type[s->mb_y * s->mb_stride + s->mb_x])) { 347 /* skip mb */ 348 s->mb_intra = 0; 349 for(i=0;i<6;i++) 350 s->block_last_index[i] = -1; 351 s->mv_dir = MV_DIR_FORWARD; 352 s->mv_type = MV_TYPE_16X16; 353 s->mv[0][0][0] = 0; 354 s->mv[0][0][1] = 0; 355 s->mb_skipped = 1; 356 w->hshift=0; 357 return 0; 358 } 359 360 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3); 361 if (code < 0) 362 return -1; 363 s->mb_intra = (~code & 0x40) >> 6; 364 365 cbp = code & 0x3f; 366 } else { 367 s->mb_intra = 1; 368 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); 369 if (code < 0){ 370 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); 371 return -1; 372 } 373 /* predict coded block pattern */ 374 cbp = 0; 375 for(i=0;i<6;i++) { 376 int val = ((code >> (5 - i)) & 1); 377 if (i < 4) { 378 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); 379 val = val ^ pred; 380 *coded_val = val; 381 } 382 cbp |= val << (5 - i); 383 } 384 } 385 386 if (!s->mb_intra) { 387 int mx, my; 388//printf("P at %d %d\n", s->mb_x, s->mb_y); 389 wmv2_pred_motion(w, &mx, &my); 390 391 if(cbp){ 392 s->dsp.clear_blocks(s->block[0]); 393 if(s->per_mb_rl_table){ 394 s->rl_table_index = decode012(&s->gb); 395 s->rl_chroma_table_index = s->rl_table_index; 396 } 397 398 if(w->abt_flag && w->per_mb_abt){ 399 w->per_block_abt= get_bits1(&s->gb); 400 if(!w->per_block_abt) 401 w->abt_type= decode012(&s->gb); 402 }else 403 w->per_block_abt=0; 404 } 405 406 if (wmv2_decode_motion(w, &mx, &my) < 0) 407 return -1; 408 409 s->mv_dir = MV_DIR_FORWARD; 410 s->mv_type = MV_TYPE_16X16; 411 s->mv[0][0][0] = mx; 412 s->mv[0][0][1] = my; 413 414 for (i = 0; i < 6; i++) { 415 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0) 416 { 417 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 418 return -1; 419 } 420 } 421 } else { 422//if(s->pict_type==AV_PICTURE_TYPE_P) 423// printf("%d%d ", s->inter_intra_pred, cbp); 424//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)); 425 s->ac_pred = get_bits1(&s->gb); 426 if(s->inter_intra_pred){ 427 s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); 428// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); 429 } 430 if(s->per_mb_rl_table && cbp){ 431 s->rl_table_index = decode012(&s->gb); 432 s->rl_chroma_table_index = s->rl_table_index; 433 } 434 435 s->dsp.clear_blocks(s->block[0]); 436 for (i = 0; i < 6; i++) { 437 if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) 438 { 439 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); 440 return -1; 441 } 442 } 443 } 444 445 return 0; 446} 447 448static av_cold int wmv2_decode_init(AVCodecContext *avctx){ 449 Wmv2Context * const w= avctx->priv_data; 450 451 if(avctx->idct_algo==FF_IDCT_AUTO){ 452 avctx->idct_algo=FF_IDCT_WMV2; 453 } 454 455 if(ff_msmpeg4_decode_init(avctx) < 0) 456 return -1; 457 458 ff_wmv2_common_init(w); 459 460 ff_intrax8_common_init(&w->x8,&w->s); 461 462 return 0; 463} 464 465static av_cold int wmv2_decode_end(AVCodecContext *avctx) 466{ 467 Wmv2Context *w = avctx->priv_data; 468 469 ff_intrax8_common_end(&w->x8); 470 return ff_h263_decode_end(avctx); 471} 472 473AVCodec ff_wmv2_decoder = { 474 .name = "wmv2", 475 .type = AVMEDIA_TYPE_VIDEO, 476 .id = CODEC_ID_WMV2, 477 .priv_data_size = sizeof(Wmv2Context), 478 .init = wmv2_decode_init, 479 .close = wmv2_decode_end, 480 .decode = ff_h263_decode_frame, 481 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, 482 .max_lowres = 3, 483 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), 484 .pix_fmts= ff_pixfmt_list_420, 485}; 486