Libav 0.7.1
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00001 /* 00002 * VC-1 and WMV3 decoder common code 00003 * Copyright (c) 2006-2007 Konstantin Shishkov 00004 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00028 #include "internal.h" 00029 #include "dsputil.h" 00030 #include "avcodec.h" 00031 #include "mpegvideo.h" 00032 #include "vc1.h" 00033 #include "vc1data.h" 00034 #include "msmpeg4data.h" 00035 #include "unary.h" 00036 #include "simple_idct.h" 00037 00038 #undef NDEBUG 00039 #include <assert.h> 00040 00041 /***********************************************************************/ 00052 enum Imode { 00053 IMODE_RAW, 00054 IMODE_NORM2, 00055 IMODE_DIFF2, 00056 IMODE_NORM6, 00057 IMODE_DIFF6, 00058 IMODE_ROWSKIP, 00059 IMODE_COLSKIP 00060 }; //imode defines 00062 00069 static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){ 00070 int x, y; 00071 00072 for (y=0; y<height; y++){ 00073 if (!get_bits1(gb)) //rowskip 00074 memset(plane, 0, width); 00075 else 00076 for (x=0; x<width; x++) 00077 plane[x] = get_bits1(gb); 00078 plane += stride; 00079 } 00080 } 00081 00089 static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){ 00090 int x, y; 00091 00092 for (x=0; x<width; x++){ 00093 if (!get_bits1(gb)) //colskip 00094 for (y=0; y<height; y++) 00095 plane[y*stride] = 0; 00096 else 00097 for (y=0; y<height; y++) 00098 plane[y*stride] = get_bits1(gb); 00099 plane ++; 00100 } 00101 } 00102 00110 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v) 00111 { 00112 GetBitContext *gb = &v->s.gb; 00113 00114 int imode, x, y, code, offset; 00115 uint8_t invert, *planep = data; 00116 int width, height, stride; 00117 00118 width = v->s.mb_width; 00119 height = v->s.mb_height; 00120 stride = v->s.mb_stride; 00121 invert = get_bits1(gb); 00122 imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1); 00123 00124 *raw_flag = 0; 00125 switch (imode) 00126 { 00127 case IMODE_RAW: 00128 //Data is actually read in the MB layer (same for all tests == "raw") 00129 *raw_flag = 1; //invert ignored 00130 return invert; 00131 case IMODE_DIFF2: 00132 case IMODE_NORM2: 00133 if ((height * width) & 1) 00134 { 00135 *planep++ = get_bits1(gb); 00136 offset = 1; 00137 } 00138 else offset = 0; 00139 // decode bitplane as one long line 00140 for (y = offset; y < height * width; y += 2) { 00141 code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1); 00142 *planep++ = code & 1; 00143 offset++; 00144 if(offset == width) { 00145 offset = 0; 00146 planep += stride - width; 00147 } 00148 *planep++ = code >> 1; 00149 offset++; 00150 if(offset == width) { 00151 offset = 0; 00152 planep += stride - width; 00153 } 00154 } 00155 break; 00156 case IMODE_DIFF6: 00157 case IMODE_NORM6: 00158 if(!(height % 3) && (width % 3)) { // use 2x3 decoding 00159 for(y = 0; y < height; y+= 3) { 00160 for(x = width & 1; x < width; x += 2) { 00161 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2); 00162 if(code < 0){ 00163 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n"); 00164 return -1; 00165 } 00166 planep[x + 0] = (code >> 0) & 1; 00167 planep[x + 1] = (code >> 1) & 1; 00168 planep[x + 0 + stride] = (code >> 2) & 1; 00169 planep[x + 1 + stride] = (code >> 3) & 1; 00170 planep[x + 0 + stride * 2] = (code >> 4) & 1; 00171 planep[x + 1 + stride * 2] = (code >> 5) & 1; 00172 } 00173 planep += stride * 3; 00174 } 00175 if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb); 00176 } else { // 3x2 00177 planep += (height & 1) * stride; 00178 for(y = height & 1; y < height; y += 2) { 00179 for(x = width % 3; x < width; x += 3) { 00180 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2); 00181 if(code < 0){ 00182 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n"); 00183 return -1; 00184 } 00185 planep[x + 0] = (code >> 0) & 1; 00186 planep[x + 1] = (code >> 1) & 1; 00187 planep[x + 2] = (code >> 2) & 1; 00188 planep[x + 0 + stride] = (code >> 3) & 1; 00189 planep[x + 1 + stride] = (code >> 4) & 1; 00190 planep[x + 2 + stride] = (code >> 5) & 1; 00191 } 00192 planep += stride * 2; 00193 } 00194 x = width % 3; 00195 if(x) decode_colskip(data , x, height , stride, &v->s.gb); 00196 if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb); 00197 } 00198 break; 00199 case IMODE_ROWSKIP: 00200 decode_rowskip(data, width, height, stride, &v->s.gb); 00201 break; 00202 case IMODE_COLSKIP: 00203 decode_colskip(data, width, height, stride, &v->s.gb); 00204 break; 00205 default: break; 00206 } 00207 00208 /* Applying diff operator */ 00209 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) 00210 { 00211 planep = data; 00212 planep[0] ^= invert; 00213 for (x=1; x<width; x++) 00214 planep[x] ^= planep[x-1]; 00215 for (y=1; y<height; y++) 00216 { 00217 planep += stride; 00218 planep[0] ^= planep[-stride]; 00219 for (x=1; x<width; x++) 00220 { 00221 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert; 00222 else planep[x] ^= planep[x-1]; 00223 } 00224 } 00225 } 00226 else if (invert) 00227 { 00228 planep = data; 00229 for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride 00230 } 00231 return (imode<<1) + invert; 00232 } 00233 //Bitplane group 00235 00236 /***********************************************************************/ 00240 static int vop_dquant_decoding(VC1Context *v) 00241 { 00242 GetBitContext *gb = &v->s.gb; 00243 int pqdiff; 00244 00245 //variable size 00246 if (v->dquant == 2) 00247 { 00248 pqdiff = get_bits(gb, 3); 00249 if (pqdiff == 7) v->altpq = get_bits(gb, 5); 00250 else v->altpq = v->pq + pqdiff + 1; 00251 } 00252 else 00253 { 00254 v->dquantfrm = get_bits1(gb); 00255 if ( v->dquantfrm ) 00256 { 00257 v->dqprofile = get_bits(gb, 2); 00258 switch (v->dqprofile) 00259 { 00260 case DQPROFILE_SINGLE_EDGE: 00261 case DQPROFILE_DOUBLE_EDGES: 00262 v->dqsbedge = get_bits(gb, 2); 00263 break; 00264 case DQPROFILE_ALL_MBS: 00265 v->dqbilevel = get_bits1(gb); 00266 if(!v->dqbilevel) 00267 v->halfpq = 0; 00268 default: break; //Forbidden ? 00269 } 00270 if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS) 00271 { 00272 pqdiff = get_bits(gb, 3); 00273 if (pqdiff == 7) v->altpq = get_bits(gb, 5); 00274 else v->altpq = v->pq + pqdiff + 1; 00275 } 00276 } 00277 } 00278 return 0; 00279 } 00280 00281 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb); 00282 00290 int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb) 00291 { 00292 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32)); 00293 v->profile = get_bits(gb, 2); 00294 if (v->profile == PROFILE_COMPLEX) 00295 { 00296 av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n"); 00297 } 00298 00299 if (v->profile == PROFILE_ADVANCED) 00300 { 00301 v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz; 00302 v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz; 00303 return decode_sequence_header_adv(v, gb); 00304 } 00305 else 00306 { 00307 v->zz_8x4 = wmv2_scantableA; 00308 v->zz_4x8 = wmv2_scantableB; 00309 v->res_y411 = get_bits1(gb); 00310 v->res_sprite = get_bits1(gb); 00311 if (v->res_y411) 00312 { 00313 av_log(avctx, AV_LOG_ERROR, 00314 "Old interlaced mode is not supported\n"); 00315 return -1; 00316 } 00317 if (v->res_sprite) { 00318 av_log(avctx, AV_LOG_ERROR, "WMVP is not fully supported\n"); 00319 } 00320 } 00321 00322 // (fps-2)/4 (->30) 00323 v->frmrtq_postproc = get_bits(gb, 3); //common 00324 // (bitrate-32kbps)/64kbps 00325 v->bitrtq_postproc = get_bits(gb, 5); //common 00326 v->s.loop_filter = get_bits1(gb); //common 00327 if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) 00328 { 00329 av_log(avctx, AV_LOG_ERROR, 00330 "LOOPFILTER shall not be enabled in Simple Profile\n"); 00331 } 00332 if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL) 00333 v->s.loop_filter = 0; 00334 00335 v->res_x8 = get_bits1(gb); //reserved 00336 v->multires = get_bits1(gb); 00337 v->res_fasttx = get_bits1(gb); 00338 if (!v->res_fasttx) 00339 { 00340 v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct; 00341 v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add; 00342 v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add; 00343 v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add; 00344 v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add; 00345 v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add; 00346 v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add; 00347 v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add; 00348 } 00349 00350 v->fastuvmc = get_bits1(gb); //common 00351 if (!v->profile && !v->fastuvmc) 00352 { 00353 av_log(avctx, AV_LOG_ERROR, 00354 "FASTUVMC unavailable in Simple Profile\n"); 00355 return -1; 00356 } 00357 v->extended_mv = get_bits1(gb); //common 00358 if (!v->profile && v->extended_mv) 00359 { 00360 av_log(avctx, AV_LOG_ERROR, 00361 "Extended MVs unavailable in Simple Profile\n"); 00362 return -1; 00363 } 00364 v->dquant = get_bits(gb, 2); //common 00365 v->vstransform = get_bits1(gb); //common 00366 00367 v->res_transtab = get_bits1(gb); 00368 if (v->res_transtab) 00369 { 00370 av_log(avctx, AV_LOG_ERROR, 00371 "1 for reserved RES_TRANSTAB is forbidden\n"); 00372 return -1; 00373 } 00374 00375 v->overlap = get_bits1(gb); //common 00376 00377 v->s.resync_marker = get_bits1(gb); 00378 v->rangered = get_bits1(gb); 00379 if (v->rangered && v->profile == PROFILE_SIMPLE) 00380 { 00381 av_log(avctx, AV_LOG_INFO, 00382 "RANGERED should be set to 0 in Simple Profile\n"); 00383 } 00384 00385 v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common 00386 v->quantizer_mode = get_bits(gb, 2); //common 00387 00388 v->finterpflag = get_bits1(gb); //common 00389 00390 if (v->res_sprite) { 00391 v->s.avctx->width = v->s.avctx->coded_width = get_bits(gb, 11); 00392 v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11); 00393 skip_bits(gb, 5); //frame rate 00394 v->res_x8 = get_bits1(gb); 00395 if (get_bits1(gb)) { // something to do with DC VLC selection 00396 av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n"); 00397 return -1; 00398 } 00399 skip_bits(gb, 3); //slice code 00400 v->res_rtm_flag = 0; 00401 } else { 00402 v->res_rtm_flag = get_bits1(gb); //reserved 00403 } 00404 if (!v->res_rtm_flag) 00405 { 00406 // av_log(avctx, AV_LOG_ERROR, 00407 // "0 for reserved RES_RTM_FLAG is forbidden\n"); 00408 av_log(avctx, AV_LOG_ERROR, 00409 "Old WMV3 version detected, some frames may be decoded incorrectly\n"); 00410 //return -1; 00411 } 00412 //TODO: figure out what they mean (always 0x402F) 00413 if(!v->res_fasttx) skip_bits(gb, 16); 00414 av_log(avctx, AV_LOG_DEBUG, 00415 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n" 00416 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n" 00417 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n" 00418 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n", 00419 v->profile, v->frmrtq_postproc, v->bitrtq_postproc, 00420 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv, 00421 v->rangered, v->vstransform, v->overlap, v->s.resync_marker, 00422 v->dquant, v->quantizer_mode, avctx->max_b_frames 00423 ); 00424 return 0; 00425 } 00426 00427 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb) 00428 { 00429 v->res_rtm_flag = 1; 00430 v->level = get_bits(gb, 3); 00431 if(v->level >= 5) 00432 { 00433 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level); 00434 } 00435 v->chromaformat = get_bits(gb, 2); 00436 if (v->chromaformat != 1) 00437 { 00438 av_log(v->s.avctx, AV_LOG_ERROR, 00439 "Only 4:2:0 chroma format supported\n"); 00440 return -1; 00441 } 00442 00443 // (fps-2)/4 (->30) 00444 v->frmrtq_postproc = get_bits(gb, 3); //common 00445 // (bitrate-32kbps)/64kbps 00446 v->bitrtq_postproc = get_bits(gb, 5); //common 00447 v->postprocflag = get_bits1(gb); //common 00448 00449 v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1; 00450 v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1; 00451 v->s.avctx->width = v->s.avctx->coded_width; 00452 v->s.avctx->height = v->s.avctx->coded_height; 00453 v->broadcast = get_bits1(gb); 00454 v->interlace = get_bits1(gb); 00455 v->tfcntrflag = get_bits1(gb); 00456 v->finterpflag = get_bits1(gb); 00457 skip_bits1(gb); // reserved 00458 00459 v->s.h_edge_pos = v->s.avctx->coded_width; 00460 v->s.v_edge_pos = v->s.avctx->coded_height; 00461 00462 av_log(v->s.avctx, AV_LOG_DEBUG, 00463 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n" 00464 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n" 00465 "TFCTRflag=%i, FINTERPflag=%i\n", 00466 v->level, v->frmrtq_postproc, v->bitrtq_postproc, 00467 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace, 00468 v->tfcntrflag, v->finterpflag 00469 ); 00470 00471 v->psf = get_bits1(gb); 00472 if(v->psf) { //PsF, 6.1.13 00473 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n"); 00474 return -1; 00475 } 00476 v->s.max_b_frames = v->s.avctx->max_b_frames = 7; 00477 if(get_bits1(gb)) { //Display Info - decoding is not affected by it 00478 int w, h, ar = 0; 00479 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n"); 00480 v->s.avctx->width = w = get_bits(gb, 14) + 1; 00481 v->s.avctx->height = h = get_bits(gb, 14) + 1; 00482 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h); 00483 if(get_bits1(gb)) 00484 ar = get_bits(gb, 4); 00485 if(ar && ar < 14){ 00486 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar]; 00487 }else if(ar == 15){ 00488 w = get_bits(gb, 8) + 1; 00489 h = get_bits(gb, 8) + 1; 00490 v->s.avctx->sample_aspect_ratio = (AVRational){w, h}; 00491 } 00492 av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den); 00493 00494 if(get_bits1(gb)){ //framerate stuff 00495 if(get_bits1(gb)) { 00496 v->s.avctx->time_base.num = 32; 00497 v->s.avctx->time_base.den = get_bits(gb, 16) + 1; 00498 } else { 00499 int nr, dr; 00500 nr = get_bits(gb, 8); 00501 dr = get_bits(gb, 4); 00502 if(nr && nr < 8 && dr && dr < 3){ 00503 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1]; 00504 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000; 00505 } 00506 } 00507 } 00508 00509 if(get_bits1(gb)){ 00510 v->color_prim = get_bits(gb, 8); 00511 v->transfer_char = get_bits(gb, 8); 00512 v->matrix_coef = get_bits(gb, 8); 00513 } 00514 } 00515 00516 v->hrd_param_flag = get_bits1(gb); 00517 if(v->hrd_param_flag) { 00518 int i; 00519 v->hrd_num_leaky_buckets = get_bits(gb, 5); 00520 skip_bits(gb, 4); //bitrate exponent 00521 skip_bits(gb, 4); //buffer size exponent 00522 for(i = 0; i < v->hrd_num_leaky_buckets; i++) { 00523 skip_bits(gb, 16); //hrd_rate[n] 00524 skip_bits(gb, 16); //hrd_buffer[n] 00525 } 00526 } 00527 return 0; 00528 } 00529 00530 int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb) 00531 { 00532 int i; 00533 00534 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32)); 00535 v->broken_link = get_bits1(gb); 00536 v->closed_entry = get_bits1(gb); 00537 v->panscanflag = get_bits1(gb); 00538 v->refdist_flag = get_bits1(gb); 00539 v->s.loop_filter = get_bits1(gb); 00540 v->fastuvmc = get_bits1(gb); 00541 v->extended_mv = get_bits1(gb); 00542 v->dquant = get_bits(gb, 2); 00543 v->vstransform = get_bits1(gb); 00544 v->overlap = get_bits1(gb); 00545 v->quantizer_mode = get_bits(gb, 2); 00546 00547 if(v->hrd_param_flag){ 00548 for(i = 0; i < v->hrd_num_leaky_buckets; i++) { 00549 skip_bits(gb, 8); //hrd_full[n] 00550 } 00551 } 00552 00553 if(get_bits1(gb)){ 00554 avctx->coded_width = (get_bits(gb, 12)+1)<<1; 00555 avctx->coded_height = (get_bits(gb, 12)+1)<<1; 00556 } 00557 if(v->extended_mv) 00558 v->extended_dmv = get_bits1(gb); 00559 if((v->range_mapy_flag = get_bits1(gb))) { 00560 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n"); 00561 v->range_mapy = get_bits(gb, 3); 00562 } 00563 if((v->range_mapuv_flag = get_bits1(gb))) { 00564 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n"); 00565 v->range_mapuv = get_bits(gb, 3); 00566 } 00567 00568 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n" 00569 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n" 00570 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n" 00571 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n", 00572 v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter, 00573 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode); 00574 00575 return 0; 00576 } 00577 00578 int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb) 00579 { 00580 int pqindex, lowquant, status; 00581 00582 if(v->finterpflag) v->interpfrm = get_bits1(gb); 00583 skip_bits(gb, 2); //framecnt unused 00584 v->rangeredfrm = 0; 00585 if (v->rangered) v->rangeredfrm = get_bits1(gb); 00586 v->s.pict_type = get_bits1(gb); 00587 if (v->s.avctx->max_b_frames) { 00588 if (!v->s.pict_type) { 00589 if (get_bits1(gb)) v->s.pict_type = AV_PICTURE_TYPE_I; 00590 else v->s.pict_type = AV_PICTURE_TYPE_B; 00591 } else v->s.pict_type = AV_PICTURE_TYPE_P; 00592 } else v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I; 00593 00594 v->bi_type = 0; 00595 if(v->s.pict_type == AV_PICTURE_TYPE_B) { 00596 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1); 00597 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index]; 00598 if(v->bfraction == 0) { 00599 v->s.pict_type = AV_PICTURE_TYPE_BI; 00600 } 00601 } 00602 if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) 00603 skip_bits(gb, 7); // skip buffer fullness 00604 00605 if(v->parse_only) 00606 return 0; 00607 00608 /* calculate RND */ 00609 if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) 00610 v->rnd = 1; 00611 if(v->s.pict_type == AV_PICTURE_TYPE_P) 00612 v->rnd ^= 1; 00613 00614 /* Quantizer stuff */ 00615 pqindex = get_bits(gb, 5); 00616 if(!pqindex) return -1; 00617 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT) 00618 v->pq = ff_vc1_pquant_table[0][pqindex]; 00619 else 00620 v->pq = ff_vc1_pquant_table[1][pqindex]; 00621 00622 v->pquantizer = 1; 00623 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT) 00624 v->pquantizer = pqindex < 9; 00625 if (v->quantizer_mode == QUANT_NON_UNIFORM) 00626 v->pquantizer = 0; 00627 v->pqindex = pqindex; 00628 if (pqindex < 9) v->halfpq = get_bits1(gb); 00629 else v->halfpq = 0; 00630 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT) 00631 v->pquantizer = get_bits1(gb); 00632 v->dquantfrm = 0; 00633 if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3); 00634 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13 00635 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11 00636 v->range_x = 1 << (v->k_x - 1); 00637 v->range_y = 1 << (v->k_y - 1); 00638 if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B) v->respic = get_bits(gb, 2); 00639 00640 if(v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)){ 00641 v->x8_type = get_bits1(gb); 00642 }else v->x8_type = 0; 00643 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n", 00644 // (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm); 00645 00646 if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0; 00647 00648 switch(v->s.pict_type) { 00649 case AV_PICTURE_TYPE_P: 00650 if (v->pq < 5) v->tt_index = 0; 00651 else if(v->pq < 13) v->tt_index = 1; 00652 else v->tt_index = 2; 00653 00654 lowquant = (v->pq > 12) ? 0 : 1; 00655 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)]; 00656 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) 00657 { 00658 int scale, shift, i; 00659 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)]; 00660 v->lumscale = get_bits(gb, 6); 00661 v->lumshift = get_bits(gb, 6); 00662 v->use_ic = 1; 00663 /* fill lookup tables for intensity compensation */ 00664 if(!v->lumscale) { 00665 scale = -64; 00666 shift = (255 - v->lumshift * 2) << 6; 00667 if(v->lumshift > 31) 00668 shift += 128 << 6; 00669 } else { 00670 scale = v->lumscale + 32; 00671 if(v->lumshift > 31) 00672 shift = (v->lumshift - 64) << 6; 00673 else 00674 shift = v->lumshift << 6; 00675 } 00676 for(i = 0; i < 256; i++) { 00677 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6); 00678 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6); 00679 } 00680 } 00681 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) 00682 v->s.quarter_sample = 0; 00683 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) { 00684 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN) 00685 v->s.quarter_sample = 0; 00686 else 00687 v->s.quarter_sample = 1; 00688 } else 00689 v->s.quarter_sample = 1; 00690 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)); 00691 00692 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP && 00693 v->mv_mode2 == MV_PMODE_MIXED_MV) 00694 || v->mv_mode == MV_PMODE_MIXED_MV) 00695 { 00696 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v); 00697 if (status < 0) return -1; 00698 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: " 00699 "Imode: %i, Invert: %i\n", status>>1, status&1); 00700 } else { 00701 v->mv_type_is_raw = 0; 00702 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height); 00703 } 00704 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v); 00705 if (status < 0) return -1; 00706 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: " 00707 "Imode: %i, Invert: %i\n", status>>1, status&1); 00708 00709 /* Hopefully this is correct for P frames */ 00710 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables 00711 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)]; 00712 00713 if (v->dquant) 00714 { 00715 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n"); 00716 vop_dquant_decoding(v); 00717 } 00718 00719 v->ttfrm = 0; //FIXME Is that so ? 00720 if (v->vstransform) 00721 { 00722 v->ttmbf = get_bits1(gb); 00723 if (v->ttmbf) 00724 { 00725 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)]; 00726 } 00727 } else { 00728 v->ttmbf = 1; 00729 v->ttfrm = TT_8X8; 00730 } 00731 break; 00732 case AV_PICTURE_TYPE_B: 00733 if (v->pq < 5) v->tt_index = 0; 00734 else if(v->pq < 13) v->tt_index = 1; 00735 else v->tt_index = 2; 00736 00737 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN; 00738 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV); 00739 v->s.mspel = v->s.quarter_sample; 00740 00741 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v); 00742 if (status < 0) return -1; 00743 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: " 00744 "Imode: %i, Invert: %i\n", status>>1, status&1); 00745 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v); 00746 if (status < 0) return -1; 00747 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: " 00748 "Imode: %i, Invert: %i\n", status>>1, status&1); 00749 00750 v->s.mv_table_index = get_bits(gb, 2); 00751 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)]; 00752 00753 if (v->dquant) 00754 { 00755 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n"); 00756 vop_dquant_decoding(v); 00757 } 00758 00759 v->ttfrm = 0; 00760 if (v->vstransform) 00761 { 00762 v->ttmbf = get_bits1(gb); 00763 if (v->ttmbf) 00764 { 00765 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)]; 00766 } 00767 } else { 00768 v->ttmbf = 1; 00769 v->ttfrm = TT_8X8; 00770 } 00771 break; 00772 } 00773 00774 if(!v->x8_type) 00775 { 00776 /* AC Syntax */ 00777 v->c_ac_table_index = decode012(gb); 00778 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) 00779 { 00780 v->y_ac_table_index = decode012(gb); 00781 } 00782 /* DC Syntax */ 00783 v->s.dc_table_index = get_bits1(gb); 00784 } 00785 00786 if(v->s.pict_type == AV_PICTURE_TYPE_BI) { 00787 v->s.pict_type = AV_PICTURE_TYPE_B; 00788 v->bi_type = 1; 00789 } 00790 return 0; 00791 } 00792 00793 int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb) 00794 { 00795 int pqindex, lowquant; 00796 int status; 00797 00798 v->p_frame_skipped = 0; 00799 00800 if(v->interlace){ 00801 v->fcm = decode012(gb); 00802 if(v->fcm){ 00803 if(!v->warn_interlaced++) 00804 av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n"); 00805 return -1; 00806 } 00807 } 00808 switch(get_unary(gb, 0, 4)) { 00809 case 0: 00810 v->s.pict_type = AV_PICTURE_TYPE_P; 00811 break; 00812 case 1: 00813 v->s.pict_type = AV_PICTURE_TYPE_B; 00814 break; 00815 case 2: 00816 v->s.pict_type = AV_PICTURE_TYPE_I; 00817 break; 00818 case 3: 00819 v->s.pict_type = AV_PICTURE_TYPE_BI; 00820 break; 00821 case 4: 00822 v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic 00823 v->p_frame_skipped = 1; 00824 return 0; 00825 } 00826 if(v->tfcntrflag) 00827 skip_bits(gb, 8); 00828 if(v->broadcast) { 00829 if(!v->interlace || v->psf) { 00830 v->rptfrm = get_bits(gb, 2); 00831 } else { 00832 v->tff = get_bits1(gb); 00833 v->rptfrm = get_bits1(gb); 00834 } 00835 } 00836 if(v->panscanflag) { 00837 av_log_missing_feature(v->s.avctx, "Pan-scan", 0); 00838 //... 00839 } 00840 v->rnd = get_bits1(gb); 00841 if(v->interlace) 00842 v->uvsamp = get_bits1(gb); 00843 if(v->finterpflag) v->interpfrm = get_bits1(gb); 00844 if(v->s.pict_type == AV_PICTURE_TYPE_B) { 00845 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1); 00846 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index]; 00847 if(v->bfraction == 0) { 00848 v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */ 00849 } 00850 } 00851 pqindex = get_bits(gb, 5); 00852 if(!pqindex) return -1; 00853 v->pqindex = pqindex; 00854 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT) 00855 v->pq = ff_vc1_pquant_table[0][pqindex]; 00856 else 00857 v->pq = ff_vc1_pquant_table[1][pqindex]; 00858 00859 v->pquantizer = 1; 00860 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT) 00861 v->pquantizer = pqindex < 9; 00862 if (v->quantizer_mode == QUANT_NON_UNIFORM) 00863 v->pquantizer = 0; 00864 v->pqindex = pqindex; 00865 if (pqindex < 9) v->halfpq = get_bits1(gb); 00866 else v->halfpq = 0; 00867 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT) 00868 v->pquantizer = get_bits1(gb); 00869 if(v->postprocflag) 00870 v->postproc = get_bits(gb, 2); 00871 00872 if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0; 00873 00874 if(v->parse_only) 00875 return 0; 00876 00877 switch(v->s.pict_type) { 00878 case AV_PICTURE_TYPE_I: 00879 case AV_PICTURE_TYPE_BI: 00880 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v); 00881 if (status < 0) return -1; 00882 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: " 00883 "Imode: %i, Invert: %i\n", status>>1, status&1); 00884 v->condover = CONDOVER_NONE; 00885 if(v->overlap && v->pq <= 8) { 00886 v->condover = decode012(gb); 00887 if(v->condover == CONDOVER_SELECT) { 00888 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v); 00889 if (status < 0) return -1; 00890 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: " 00891 "Imode: %i, Invert: %i\n", status>>1, status&1); 00892 } 00893 } 00894 break; 00895 case AV_PICTURE_TYPE_P: 00896 if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3); 00897 else v->mvrange = 0; 00898 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13 00899 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11 00900 v->range_x = 1 << (v->k_x - 1); 00901 v->range_y = 1 << (v->k_y - 1); 00902 00903 if (v->pq < 5) v->tt_index = 0; 00904 else if(v->pq < 13) v->tt_index = 1; 00905 else v->tt_index = 2; 00906 00907 lowquant = (v->pq > 12) ? 0 : 1; 00908 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)]; 00909 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) 00910 { 00911 int scale, shift, i; 00912 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)]; 00913 v->lumscale = get_bits(gb, 6); 00914 v->lumshift = get_bits(gb, 6); 00915 /* fill lookup tables for intensity compensation */ 00916 if(!v->lumscale) { 00917 scale = -64; 00918 shift = (255 - v->lumshift * 2) << 6; 00919 if(v->lumshift > 31) 00920 shift += 128 << 6; 00921 } else { 00922 scale = v->lumscale + 32; 00923 if(v->lumshift > 31) 00924 shift = (v->lumshift - 64) << 6; 00925 else 00926 shift = v->lumshift << 6; 00927 } 00928 for(i = 0; i < 256; i++) { 00929 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6); 00930 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6); 00931 } 00932 v->use_ic = 1; 00933 } 00934 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) 00935 v->s.quarter_sample = 0; 00936 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) { 00937 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN) 00938 v->s.quarter_sample = 0; 00939 else 00940 v->s.quarter_sample = 1; 00941 } else 00942 v->s.quarter_sample = 1; 00943 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)); 00944 00945 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP && 00946 v->mv_mode2 == MV_PMODE_MIXED_MV) 00947 || v->mv_mode == MV_PMODE_MIXED_MV) 00948 { 00949 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v); 00950 if (status < 0) return -1; 00951 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: " 00952 "Imode: %i, Invert: %i\n", status>>1, status&1); 00953 } else { 00954 v->mv_type_is_raw = 0; 00955 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height); 00956 } 00957 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v); 00958 if (status < 0) return -1; 00959 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: " 00960 "Imode: %i, Invert: %i\n", status>>1, status&1); 00961 00962 /* Hopefully this is correct for P frames */ 00963 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables 00964 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)]; 00965 if (v->dquant) 00966 { 00967 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n"); 00968 vop_dquant_decoding(v); 00969 } 00970 00971 v->ttfrm = 0; //FIXME Is that so ? 00972 if (v->vstransform) 00973 { 00974 v->ttmbf = get_bits1(gb); 00975 if (v->ttmbf) 00976 { 00977 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)]; 00978 } 00979 } else { 00980 v->ttmbf = 1; 00981 v->ttfrm = TT_8X8; 00982 } 00983 break; 00984 case AV_PICTURE_TYPE_B: 00985 if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3); 00986 else v->mvrange = 0; 00987 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13 00988 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11 00989 v->range_x = 1 << (v->k_x - 1); 00990 v->range_y = 1 << (v->k_y - 1); 00991 00992 if (v->pq < 5) v->tt_index = 0; 00993 else if(v->pq < 13) v->tt_index = 1; 00994 else v->tt_index = 2; 00995 00996 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN; 00997 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV); 00998 v->s.mspel = v->s.quarter_sample; 00999 01000 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v); 01001 if (status < 0) return -1; 01002 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: " 01003 "Imode: %i, Invert: %i\n", status>>1, status&1); 01004 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v); 01005 if (status < 0) return -1; 01006 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: " 01007 "Imode: %i, Invert: %i\n", status>>1, status&1); 01008 01009 v->s.mv_table_index = get_bits(gb, 2); 01010 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)]; 01011 01012 if (v->dquant) 01013 { 01014 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n"); 01015 vop_dquant_decoding(v); 01016 } 01017 01018 v->ttfrm = 0; 01019 if (v->vstransform) 01020 { 01021 v->ttmbf = get_bits1(gb); 01022 if (v->ttmbf) 01023 { 01024 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)]; 01025 } 01026 } else { 01027 v->ttmbf = 1; 01028 v->ttfrm = TT_8X8; 01029 } 01030 break; 01031 } 01032 01033 /* AC Syntax */ 01034 v->c_ac_table_index = decode012(gb); 01035 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) 01036 { 01037 v->y_ac_table_index = decode012(gb); 01038 } 01039 /* DC Syntax */ 01040 v->s.dc_table_index = get_bits1(gb); 01041 if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) && v->dquant) { 01042 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n"); 01043 vop_dquant_decoding(v); 01044 } 01045 01046 v->bi_type = 0; 01047 if(v->s.pict_type == AV_PICTURE_TYPE_BI) { 01048 v->s.pict_type = AV_PICTURE_TYPE_B; 01049 v->bi_type = 1; 01050 } 01051 return 0; 01052 }