libavcodec/vc1.c
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00001 /*
00002  * VC-1 and WMV3 decoder common code
00003  * Copyright (c) 2011 Mashiat Sarker Shakkhar
00004  * Copyright (c) 2006-2007 Konstantin Shishkov
00005  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
00006  *
00007  * This file is part of Libav.
00008  *
00009  * Libav is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * Libav is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with Libav; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00022  */
00023 
00030 #include "internal.h"
00031 #include "dsputil.h"
00032 #include "avcodec.h"
00033 #include "mpegvideo.h"
00034 #include "vc1.h"
00035 #include "vc1data.h"
00036 #include "msmpeg4data.h"
00037 #include "unary.h"
00038 #include "simple_idct.h"
00039 
00040 #undef NDEBUG
00041 #include <assert.h>
00042 
00043 /***********************************************************************/
00054 enum Imode {
00055     IMODE_RAW,
00056     IMODE_NORM2,
00057     IMODE_DIFF2,
00058     IMODE_NORM6,
00059     IMODE_DIFF6,
00060     IMODE_ROWSKIP,
00061     IMODE_COLSKIP
00062 }; //imode defines
00064 
00071 static void decode_rowskip(uint8_t* plane, int width, int height, int stride,
00072                            GetBitContext *gb)
00073 {
00074     int x, y;
00075 
00076     for (y = 0; y < height; y++) {
00077         if (!get_bits1(gb)) //rowskip
00078             memset(plane, 0, width);
00079         else
00080             for (x = 0; x < width; x++)
00081                 plane[x] = get_bits1(gb);
00082         plane += stride;
00083     }
00084 }
00085 
00093 static void decode_colskip(uint8_t* plane, int width, int height, int stride,
00094                            GetBitContext *gb)
00095 {
00096     int x, y;
00097 
00098     for (x = 0; x < width; x++) {
00099         if (!get_bits1(gb)) //colskip
00100             for (y = 0; y < height; y++)
00101                 plane[y*stride] = 0;
00102         else
00103             for (y = 0; y < height; y++)
00104                 plane[y*stride] = get_bits1(gb);
00105         plane ++;
00106     }
00107 }
00108 
00116 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
00117 {
00118     GetBitContext *gb = &v->s.gb;
00119 
00120     int imode, x, y, code, offset;
00121     uint8_t invert, *planep = data;
00122     int width, height, stride;
00123 
00124     width  = v->s.mb_width;
00125     height = v->s.mb_height >> v->field_mode;
00126     stride = v->s.mb_stride;
00127     invert = get_bits1(gb);
00128     imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
00129 
00130     *raw_flag = 0;
00131     switch (imode) {
00132     case IMODE_RAW:
00133         //Data is actually read in the MB layer (same for all tests == "raw")
00134         *raw_flag = 1; //invert ignored
00135         return invert;
00136     case IMODE_DIFF2:
00137     case IMODE_NORM2:
00138         if ((height * width) & 1) {
00139             *planep++ = get_bits1(gb);
00140             offset    = 1;
00141         }
00142         else
00143             offset = 0;
00144         // decode bitplane as one long line
00145         for (y = offset; y < height * width; y += 2) {
00146             code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
00147             *planep++ = code & 1;
00148             offset++;
00149             if (offset == width) {
00150                 offset  = 0;
00151                 planep += stride - width;
00152             }
00153             *planep++ = code >> 1;
00154             offset++;
00155             if (offset == width) {
00156                 offset  = 0;
00157                 planep += stride - width;
00158             }
00159         }
00160         break;
00161     case IMODE_DIFF6:
00162     case IMODE_NORM6:
00163         if (!(height % 3) && (width % 3)) { // use 2x3 decoding
00164             for (y = 0; y < height; y += 3) {
00165                 for (x = width & 1; x < width; x += 2) {
00166                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
00167                     if (code < 0) {
00168                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
00169                         return -1;
00170                     }
00171                     planep[x + 0]              = (code >> 0) & 1;
00172                     planep[x + 1]              = (code >> 1) & 1;
00173                     planep[x + 0 + stride]     = (code >> 2) & 1;
00174                     planep[x + 1 + stride]     = (code >> 3) & 1;
00175                     planep[x + 0 + stride * 2] = (code >> 4) & 1;
00176                     planep[x + 1 + stride * 2] = (code >> 5) & 1;
00177                 }
00178                 planep += stride * 3;
00179             }
00180             if (width & 1)
00181                 decode_colskip(data, 1, height, stride, &v->s.gb);
00182         } else { // 3x2
00183             planep += (height & 1) * stride;
00184             for (y = height & 1; y < height; y += 2) {
00185                 for (x = width % 3; x < width; x += 3) {
00186                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
00187                     if (code < 0) {
00188                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
00189                         return -1;
00190                     }
00191                     planep[x + 0]          = (code >> 0) & 1;
00192                     planep[x + 1]          = (code >> 1) & 1;
00193                     planep[x + 2]          = (code >> 2) & 1;
00194                     planep[x + 0 + stride] = (code >> 3) & 1;
00195                     planep[x + 1 + stride] = (code >> 4) & 1;
00196                     planep[x + 2 + stride] = (code >> 5) & 1;
00197                 }
00198                 planep += stride * 2;
00199             }
00200             x = width % 3;
00201             if (x)
00202                 decode_colskip(data,             x, height, stride, &v->s.gb);
00203             if (height & 1)
00204                 decode_rowskip(data + x, width - x,      1, stride, &v->s.gb);
00205         }
00206         break;
00207     case IMODE_ROWSKIP:
00208         decode_rowskip(data, width, height, stride, &v->s.gb);
00209         break;
00210     case IMODE_COLSKIP:
00211         decode_colskip(data, width, height, stride, &v->s.gb);
00212         break;
00213     default:
00214         break;
00215     }
00216 
00217     /* Applying diff operator */
00218     if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) {
00219         planep = data;
00220         planep[0] ^= invert;
00221         for (x = 1; x < width; x++)
00222             planep[x] ^= planep[x-1];
00223         for (y = 1; y < height; y++) {
00224             planep += stride;
00225             planep[0] ^= planep[-stride];
00226             for (x = 1; x < width; x++) {
00227                 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
00228                 else                                 planep[x] ^= planep[x-1];
00229             }
00230         }
00231     } else if (invert) {
00232         planep = data;
00233         for (x = 0; x < stride * height; x++)
00234             planep[x] = !planep[x]; //FIXME stride
00235     }
00236     return (imode << 1) + invert;
00237 }
00238  //Bitplane group
00240 
00241 /***********************************************************************/
00245 static int vop_dquant_decoding(VC1Context *v)
00246 {
00247     GetBitContext *gb = &v->s.gb;
00248     int pqdiff;
00249 
00250     //variable size
00251     if (v->dquant == 2) {
00252         pqdiff = get_bits(gb, 3);
00253         if (pqdiff == 7)
00254             v->altpq = get_bits(gb, 5);
00255         else
00256             v->altpq = v->pq + pqdiff + 1;
00257     } else {
00258         v->dquantfrm = get_bits1(gb);
00259         if (v->dquantfrm) {
00260             v->dqprofile = get_bits(gb, 2);
00261             switch (v->dqprofile) {
00262             case DQPROFILE_SINGLE_EDGE:
00263             case DQPROFILE_DOUBLE_EDGES:
00264                 v->dqsbedge = get_bits(gb, 2);
00265                 break;
00266             case DQPROFILE_ALL_MBS:
00267                 v->dqbilevel = get_bits1(gb);
00268                 if (!v->dqbilevel)
00269                     v->halfpq = 0;
00270             default:
00271                 break; //Forbidden ?
00272             }
00273             if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS) {
00274                 pqdiff = get_bits(gb, 3);
00275                 if (pqdiff == 7)
00276                     v->altpq = get_bits(gb, 5);
00277                 else
00278                     v->altpq = v->pq + pqdiff + 1;
00279             }
00280         }
00281     }
00282     return 0;
00283 }
00284 
00285 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
00286 
00294 int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
00295 {
00296     av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
00297     v->profile = get_bits(gb, 2);
00298     if (v->profile == PROFILE_COMPLEX) {
00299         av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
00300     }
00301 
00302     if (v->profile == PROFILE_ADVANCED) {
00303         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
00304         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
00305         return decode_sequence_header_adv(v, gb);
00306     } else {
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             av_log(avctx, AV_LOG_ERROR,
00313                    "Old interlaced mode is not supported\n");
00314             return -1;
00315         }
00316     }
00317 
00318     // (fps-2)/4 (->30)
00319     v->frmrtq_postproc = get_bits(gb, 3); //common
00320     // (bitrate-32kbps)/64kbps
00321     v->bitrtq_postproc = get_bits(gb, 5); //common
00322     v->s.loop_filter   = get_bits1(gb); //common
00323     if (v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) {
00324         av_log(avctx, AV_LOG_ERROR,
00325                "LOOPFILTER shall not be enabled in Simple Profile\n");
00326     }
00327     if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
00328         v->s.loop_filter = 0;
00329 
00330     v->res_x8          = get_bits1(gb); //reserved
00331     v->multires        = get_bits1(gb);
00332     v->res_fasttx      = get_bits1(gb);
00333     if (!v->res_fasttx) {
00334         v->vc1dsp.vc1_inv_trans_8x8    = ff_simple_idct_8;
00335         v->vc1dsp.vc1_inv_trans_8x4    = ff_simple_idct84_add;
00336         v->vc1dsp.vc1_inv_trans_4x8    = ff_simple_idct48_add;
00337         v->vc1dsp.vc1_inv_trans_4x4    = ff_simple_idct44_add;
00338         v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8;
00339         v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
00340         v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
00341         v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
00342     }
00343 
00344     v->fastuvmc        = get_bits1(gb); //common
00345     if (!v->profile && !v->fastuvmc) {
00346         av_log(avctx, AV_LOG_ERROR,
00347                "FASTUVMC unavailable in Simple Profile\n");
00348         return -1;
00349     }
00350     v->extended_mv     = get_bits1(gb); //common
00351     if (!v->profile && v->extended_mv)
00352     {
00353         av_log(avctx, AV_LOG_ERROR,
00354                "Extended MVs unavailable in Simple Profile\n");
00355         return -1;
00356     }
00357     v->dquant          = get_bits(gb, 2); //common
00358     v->vstransform     = get_bits1(gb); //common
00359 
00360     v->res_transtab    = get_bits1(gb);
00361     if (v->res_transtab)
00362     {
00363         av_log(avctx, AV_LOG_ERROR,
00364                "1 for reserved RES_TRANSTAB is forbidden\n");
00365         return -1;
00366     }
00367 
00368     v->overlap         = get_bits1(gb); //common
00369 
00370     v->s.resync_marker = get_bits1(gb);
00371     v->rangered        = get_bits1(gb);
00372     if (v->rangered && v->profile == PROFILE_SIMPLE) {
00373         av_log(avctx, AV_LOG_INFO,
00374                "RANGERED should be set to 0 in Simple Profile\n");
00375     }
00376 
00377     v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
00378     v->quantizer_mode = get_bits(gb, 2); //common
00379 
00380     v->finterpflag = get_bits1(gb); //common
00381 
00382     if (v->res_sprite) {
00383         v->s.avctx->width  = v->s.avctx->coded_width  = get_bits(gb, 11);
00384         v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);
00385         skip_bits(gb, 5); //frame rate
00386         v->res_x8 = get_bits1(gb);
00387         if (get_bits1(gb)) { // something to do with DC VLC selection
00388             av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
00389             return -1;
00390         }
00391         skip_bits(gb, 3); //slice code
00392         v->res_rtm_flag = 0;
00393     } else {
00394         v->res_rtm_flag = get_bits1(gb); //reserved
00395     }
00396     if (!v->res_rtm_flag) {
00397 //            av_log(avctx, AV_LOG_ERROR,
00398 //                   "0 for reserved RES_RTM_FLAG is forbidden\n");
00399         av_log(avctx, AV_LOG_ERROR,
00400                "Old WMV3 version detected, some frames may be decoded incorrectly\n");
00401         //return -1;
00402     }
00403     //TODO: figure out what they mean (always 0x402F)
00404     if (!v->res_fasttx)
00405         skip_bits(gb, 16);
00406     av_log(avctx, AV_LOG_DEBUG,
00407            "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
00408            "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
00409            "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
00410            "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
00411            v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
00412            v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
00413            v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
00414            v->dquant, v->quantizer_mode, avctx->max_b_frames);
00415     return 0;
00416 }
00417 
00418 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
00419 {
00420     v->res_rtm_flag = 1;
00421     v->level = get_bits(gb, 3);
00422     if (v->level >= 5) {
00423         av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
00424     }
00425     v->chromaformat = get_bits(gb, 2);
00426     if (v->chromaformat != 1) {
00427         av_log(v->s.avctx, AV_LOG_ERROR,
00428                "Only 4:2:0 chroma format supported\n");
00429         return -1;
00430     }
00431 
00432     // (fps-2)/4 (->30)
00433     v->frmrtq_postproc       = get_bits(gb, 3); //common
00434     // (bitrate-32kbps)/64kbps
00435     v->bitrtq_postproc       = get_bits(gb, 5); //common
00436     v->postprocflag          = get_bits1(gb);   //common
00437 
00438     v->s.avctx->coded_width  = (get_bits(gb, 12) + 1) << 1;
00439     v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
00440     v->s.avctx->width        = v->s.avctx->coded_width;
00441     v->s.avctx->height       = v->s.avctx->coded_height;
00442     v->broadcast             = get_bits1(gb);
00443     v->interlace             = get_bits1(gb);
00444     v->tfcntrflag            = get_bits1(gb);
00445     v->finterpflag           = get_bits1(gb);
00446     skip_bits1(gb); // reserved
00447 
00448     av_log(v->s.avctx, AV_LOG_DEBUG,
00449            "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
00450            "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
00451            "TFCTRflag=%i, FINTERPflag=%i\n",
00452            v->level, v->frmrtq_postproc, v->bitrtq_postproc,
00453            v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
00454            v->tfcntrflag, v->finterpflag);
00455 
00456     v->psf = get_bits1(gb);
00457     if (v->psf) { //PsF, 6.1.13
00458         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
00459         return -1;
00460     }
00461     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
00462     if (get_bits1(gb)) { //Display Info - decoding is not affected by it
00463         int w, h, ar = 0;
00464         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
00465         w = get_bits(gb, 14) + 1;
00466         h = get_bits(gb, 14) + 1;
00467         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
00468         if (get_bits1(gb))
00469             ar = get_bits(gb, 4);
00470         if (ar && ar < 14) {
00471             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
00472         } else if (ar == 15) {
00473             w = get_bits(gb, 8) + 1;
00474             h = get_bits(gb, 8) + 1;
00475             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
00476         } else {
00477             av_reduce(&v->s.avctx->sample_aspect_ratio.num,
00478                       &v->s.avctx->sample_aspect_ratio.den,
00479                       v->s.avctx->height * w,
00480                       v->s.avctx->width * h,
00481                       1 << 30);
00482         }
00483         av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n",
00484                v->s.avctx->sample_aspect_ratio.num,
00485                v->s.avctx->sample_aspect_ratio.den);
00486 
00487         if (get_bits1(gb)) { //framerate stuff
00488             if (get_bits1(gb)) {
00489                 v->s.avctx->time_base.num = 32;
00490                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
00491             } else {
00492                 int nr, dr;
00493                 nr = get_bits(gb, 8);
00494                 dr = get_bits(gb, 4);
00495                 if (nr > 0 && nr < 8 && dr > 0 && dr < 3) {
00496                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
00497                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
00498                 }
00499             }
00500             if (v->broadcast) { // Pulldown may be present
00501                 v->s.avctx->time_base.den  *= 2;
00502                 v->s.avctx->ticks_per_frame = 2;
00503             }
00504         }
00505 
00506         if (get_bits1(gb)) {
00507             v->color_prim    = get_bits(gb, 8);
00508             v->transfer_char = get_bits(gb, 8);
00509             v->matrix_coef   = get_bits(gb, 8);
00510         }
00511     }
00512 
00513     v->hrd_param_flag = get_bits1(gb);
00514     if (v->hrd_param_flag) {
00515         int i;
00516         v->hrd_num_leaky_buckets = get_bits(gb, 5);
00517         skip_bits(gb, 4); //bitrate exponent
00518         skip_bits(gb, 4); //buffer size exponent
00519         for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
00520             skip_bits(gb, 16); //hrd_rate[n]
00521             skip_bits(gb, 16); //hrd_buffer[n]
00522         }
00523     }
00524     return 0;
00525 }
00526 
00527 int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
00528 {
00529     int i;
00530 
00531     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
00532     v->broken_link    = get_bits1(gb);
00533     v->closed_entry   = get_bits1(gb);
00534     v->panscanflag    = get_bits1(gb);
00535     v->refdist_flag   = get_bits1(gb);
00536     v->s.loop_filter  = get_bits1(gb);
00537     v->fastuvmc       = get_bits1(gb);
00538     v->extended_mv    = get_bits1(gb);
00539     v->dquant         = get_bits(gb, 2);
00540     v->vstransform    = get_bits1(gb);
00541     v->overlap        = get_bits1(gb);
00542     v->quantizer_mode = get_bits(gb, 2);
00543 
00544     if (v->hrd_param_flag) {
00545         for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
00546             skip_bits(gb, 8); //hrd_full[n]
00547         }
00548     }
00549 
00550     if (get_bits1(gb)) {
00551         avctx->width  = avctx->coded_width  = (get_bits(gb, 12) + 1) << 1;
00552         avctx->height = avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
00553     }
00554     if (v->extended_mv)
00555         v->extended_dmv = get_bits1(gb);
00556     if ((v->range_mapy_flag = get_bits1(gb))) {
00557         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
00558         v->range_mapy = get_bits(gb, 3);
00559     }
00560     if ((v->range_mapuv_flag = get_bits1(gb))) {
00561         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
00562         v->range_mapuv = get_bits(gb, 3);
00563     }
00564 
00565     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
00566            "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
00567            "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
00568            "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
00569            v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
00570            v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
00571 
00572     return 0;
00573 }
00574 
00575 int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
00576 {
00577     int pqindex, lowquant, status;
00578 
00579     if (v->finterpflag)
00580         v->interpfrm = get_bits1(gb);
00581     skip_bits(gb, 2); //framecnt unused
00582     v->rangeredfrm = 0;
00583     if (v->rangered)
00584         v->rangeredfrm = get_bits1(gb);
00585     v->s.pict_type = get_bits1(gb);
00586     if (v->s.avctx->max_b_frames) {
00587         if (!v->s.pict_type) {
00588             if (get_bits1(gb))
00589                 v->s.pict_type = AV_PICTURE_TYPE_I;
00590             else
00591                 v->s.pict_type = AV_PICTURE_TYPE_B;
00592         } else
00593             v->s.pict_type = AV_PICTURE_TYPE_P;
00594     } else
00595         v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
00596 
00597     v->bi_type = 0;
00598     if (v->s.pict_type == AV_PICTURE_TYPE_B) {
00599         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
00600         v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
00601         if (v->bfraction == 0) {
00602             v->s.pict_type = AV_PICTURE_TYPE_BI;
00603         }
00604     }
00605     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
00606         skip_bits(gb, 7); // skip buffer fullness
00607 
00608     if (v->parse_only)
00609         return 0;
00610 
00611     /* calculate RND */
00612     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
00613         v->rnd = 1;
00614     if (v->s.pict_type == AV_PICTURE_TYPE_P)
00615         v->rnd ^= 1;
00616 
00617     /* Quantizer stuff */
00618     pqindex = get_bits(gb, 5);
00619     if (!pqindex)
00620         return -1;
00621     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
00622         v->pq = ff_vc1_pquant_table[0][pqindex];
00623     else
00624         v->pq = ff_vc1_pquant_table[1][pqindex];
00625 
00626     v->pquantizer = 1;
00627     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
00628         v->pquantizer = pqindex < 9;
00629     if (v->quantizer_mode == QUANT_NON_UNIFORM)
00630         v->pquantizer = 0;
00631     v->pqindex = pqindex;
00632     if (pqindex < 9)
00633         v->halfpq = get_bits1(gb);
00634     else
00635         v->halfpq = 0;
00636     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
00637         v->pquantizer = get_bits1(gb);
00638     v->dquantfrm = 0;
00639     if (v->extended_mv == 1)
00640         v->mvrange = get_unary(gb, 0, 3);
00641     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
00642     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
00643     v->range_x = 1 << (v->k_x - 1);
00644     v->range_y = 1 << (v->k_y - 1);
00645     if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
00646         v->respic = get_bits(gb, 2);
00647 
00648     if (v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)) {
00649         v->x8_type = get_bits1(gb);
00650     } else
00651         v->x8_type = 0;
00652 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
00653 //        (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);
00654 
00655     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
00656         v->use_ic = 0;
00657 
00658     switch (v->s.pict_type) {
00659     case AV_PICTURE_TYPE_P:
00660         if (v->pq < 5)       v->tt_index = 0;
00661         else if (v->pq < 13) v->tt_index = 1;
00662         else                 v->tt_index = 2;
00663 
00664         lowquant = (v->pq > 12) ? 0 : 1;
00665         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
00666         if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
00667             int scale, shift, i;
00668             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
00669             v->lumscale = get_bits(gb, 6);
00670             v->lumshift = get_bits(gb, 6);
00671             v->use_ic   = 1;
00672             /* fill lookup tables for intensity compensation */
00673             if (!v->lumscale) {
00674                 scale = -64;
00675                 shift = (255 - v->lumshift * 2) << 6;
00676                 if (v->lumshift > 31)
00677                     shift += 128 << 6;
00678             } else {
00679                 scale = v->lumscale + 32;
00680                 if (v->lumshift > 31)
00681                     shift = (v->lumshift - 64) << 6;
00682                 else
00683                     shift = v->lumshift << 6;
00684             }
00685             for (i = 0; i < 256; i++) {
00686                 v->luty[i]  = av_clip_uint8((scale * i + shift + 32) >> 6);
00687                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
00688             }
00689         }
00690         v->qs_last = v->s.quarter_sample;
00691         if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
00692             v->s.quarter_sample = 0;
00693         else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
00694             if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
00695                 v->s.quarter_sample = 0;
00696             else
00697                 v->s.quarter_sample = 1;
00698         } else
00699             v->s.quarter_sample = 1;
00700         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));
00701 
00702         if ((v->mv_mode  == MV_PMODE_INTENSITY_COMP &&
00703              v->mv_mode2 == MV_PMODE_MIXED_MV)      ||
00704             v->mv_mode   == MV_PMODE_MIXED_MV) {
00705             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
00706             if (status < 0)
00707                 return -1;
00708             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
00709                    "Imode: %i, Invert: %i\n", status>>1, status&1);
00710         } else {
00711             v->mv_type_is_raw = 0;
00712             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
00713         }
00714         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
00715         if (status < 0)
00716             return -1;
00717         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
00718                "Imode: %i, Invert: %i\n", status>>1, status&1);
00719 
00720         /* Hopefully this is correct for P frames */
00721         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
00722         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
00723 
00724         if (v->dquant) {
00725             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
00726             vop_dquant_decoding(v);
00727         }
00728 
00729         v->ttfrm = 0; //FIXME Is that so ?
00730         if (v->vstransform) {
00731             v->ttmbf = get_bits1(gb);
00732             if (v->ttmbf) {
00733                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
00734             }
00735         } else {
00736             v->ttmbf = 1;
00737             v->ttfrm = TT_8X8;
00738         }
00739         break;
00740     case AV_PICTURE_TYPE_B:
00741         if (v->pq < 5)       v->tt_index = 0;
00742         else if (v->pq < 13) v->tt_index = 1;
00743         else                 v->tt_index = 2;
00744 
00745         v->mv_mode          = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
00746         v->qs_last          = v->s.quarter_sample;
00747         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
00748         v->s.mspel          = v->s.quarter_sample;
00749 
00750         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
00751         if (status < 0)
00752             return -1;
00753         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
00754                "Imode: %i, Invert: %i\n", status>>1, status&1);
00755         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
00756         if (status < 0)
00757             return -1;
00758         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
00759                "Imode: %i, Invert: %i\n", status>>1, status&1);
00760 
00761         v->s.mv_table_index = get_bits(gb, 2);
00762         v->cbpcy_vlc        = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
00763 
00764         if (v->dquant) {
00765             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
00766             vop_dquant_decoding(v);
00767         }
00768 
00769         v->ttfrm = 0;
00770         if (v->vstransform) {
00771             v->ttmbf = get_bits1(gb);
00772             if (v->ttmbf) {
00773                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
00774             }
00775         } else {
00776             v->ttmbf = 1;
00777             v->ttfrm = TT_8X8;
00778         }
00779         break;
00780     }
00781 
00782     if (!v->x8_type) {
00783         /* AC Syntax */
00784         v->c_ac_table_index = decode012(gb);
00785         if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
00786             v->y_ac_table_index = decode012(gb);
00787         }
00788         /* DC Syntax */
00789         v->s.dc_table_index = get_bits1(gb);
00790     }
00791 
00792     if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
00793         v->s.pict_type = AV_PICTURE_TYPE_B;
00794         v->bi_type     = 1;
00795     }
00796     return 0;
00797 }
00798 
00799 /* fill lookup tables for intensity compensation */
00800 #define INIT_LUT(lumscale, lumshift, luty, lutuv)   \
00801     if (!lumscale) {                                \
00802         scale = -64;                                \
00803         shift = (255 - lumshift * 2) << 6;          \
00804         if (lumshift > 31)                          \
00805             shift += 128 << 6;                      \
00806     } else {                                        \
00807         scale = lumscale + 32;                      \
00808         if (lumshift > 31)                          \
00809             shift = (lumshift - 64) << 6;           \
00810         else                                        \
00811             shift = lumshift << 6;                  \
00812     }                                               \
00813     for (i = 0; i < 256; i++) {                     \
00814         luty[i]  = av_clip_uint8((scale * i + shift + 32) >> 6);           \
00815         lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);  \
00816     }
00817 
00818 int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
00819 {
00820     int pqindex, lowquant;
00821     int status;
00822     int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
00823     int scale, shift, i; /* for initializing LUT for intensity compensation */
00824 
00825     v->p_frame_skipped = 0;
00826     if (v->second_field) {
00827         v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
00828         if (v->fptype & 4)
00829             v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
00830         v->s.current_picture_ptr->f.pict_type = v->s.pict_type;
00831         if (!v->pic_header_flag)
00832             goto parse_common_info;
00833     }
00834 
00835     v->field_mode = 0;
00836     if (v->interlace) {
00837         v->fcm = decode012(gb);
00838         if (v->fcm) {
00839             if (v->fcm == ILACE_FIELD)
00840                 v->field_mode = 1;
00841             if (!v->warn_interlaced++)
00842                 av_log(v->s.avctx, AV_LOG_ERROR,
00843                        "Interlaced frames/fields support is incomplete\n");
00844         }
00845     } else {
00846         v->fcm = PROGRESSIVE;
00847     }
00848 
00849     if (v->field_mode) {
00850         v->fptype = get_bits(gb, 3);
00851         v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
00852         if (v->fptype & 4) // B-picture
00853             v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
00854     } else {
00855         switch (get_unary(gb, 0, 4)) {
00856         case 0:
00857             v->s.pict_type = AV_PICTURE_TYPE_P;
00858             break;
00859         case 1:
00860             v->s.pict_type = AV_PICTURE_TYPE_B;
00861             break;
00862         case 2:
00863             v->s.pict_type = AV_PICTURE_TYPE_I;
00864             break;
00865         case 3:
00866             v->s.pict_type = AV_PICTURE_TYPE_BI;
00867             break;
00868         case 4:
00869             v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
00870             v->p_frame_skipped = 1;
00871             break;
00872         }
00873     }
00874     if (v->tfcntrflag)
00875         skip_bits(gb, 8);
00876     if (v->broadcast) {
00877         if (!v->interlace || v->psf) {
00878             v->rptfrm = get_bits(gb, 2);
00879         } else {
00880             v->tff = get_bits1(gb);
00881             v->rff = get_bits1(gb);
00882         }
00883     }
00884     if (v->panscanflag) {
00885         av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
00886         //...
00887     }
00888     if (v->p_frame_skipped) {
00889         return 0;
00890     }
00891     v->rnd = get_bits1(gb);
00892     if (v->interlace)
00893         v->uvsamp = get_bits1(gb);
00894     if (v->field_mode) {
00895         if (!v->refdist_flag)
00896             v->refdist = 0;
00897         else {
00898             if ((v->s.pict_type != AV_PICTURE_TYPE_B)
00899                 && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
00900                 v->refdist = get_bits(gb, 2);
00901                 if (v->refdist == 3)
00902                     v->refdist += get_unary(gb, 0, 16);
00903             } else {
00904                 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
00905                 v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
00906                 v->frfd = (v->bfraction * v->refdist) >> 8;
00907                 v->brfd = v->refdist - v->frfd - 1;
00908                 if (v->brfd < 0)
00909                     v->brfd = 0;
00910             }
00911         }
00912         goto parse_common_info;
00913     }
00914     if (v->finterpflag)
00915         v->interpfrm = get_bits1(gb);
00916     if (v->s.pict_type == AV_PICTURE_TYPE_B) {
00917         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
00918         v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
00919         if (v->bfraction == 0) {
00920             v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
00921         }
00922     }
00923 
00924     parse_common_info:
00925     if (v->field_mode)
00926         v->cur_field_type = !(v->tff ^ v->second_field);
00927     pqindex = get_bits(gb, 5);
00928     if (!pqindex)
00929         return -1;
00930     v->pqindex = pqindex;
00931     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
00932         v->pq = ff_vc1_pquant_table[0][pqindex];
00933     else
00934         v->pq = ff_vc1_pquant_table[1][pqindex];
00935 
00936     v->pquantizer = 1;
00937     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
00938         v->pquantizer = pqindex < 9;
00939     if (v->quantizer_mode == QUANT_NON_UNIFORM)
00940         v->pquantizer = 0;
00941     v->pqindex = pqindex;
00942     if (pqindex < 9)
00943         v->halfpq = get_bits1(gb);
00944     else
00945         v->halfpq = 0;
00946     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
00947         v->pquantizer = get_bits1(gb);
00948     if (v->postprocflag)
00949         v->postproc = get_bits(gb, 2);
00950 
00951     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
00952         v->use_ic = 0;
00953 
00954     if (v->parse_only)
00955         return 0;
00956 
00957     switch (v->s.pict_type) {
00958     case AV_PICTURE_TYPE_I:
00959     case AV_PICTURE_TYPE_BI:
00960         if (v->fcm == ILACE_FRAME) { //interlace frame picture
00961             status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
00962             if (status < 0)
00963                 return -1;
00964             av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
00965                    "Imode: %i, Invert: %i\n", status>>1, status&1);
00966         }
00967         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
00968         if (status < 0)
00969             return -1;
00970         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
00971                "Imode: %i, Invert: %i\n", status>>1, status&1);
00972         v->condover = CONDOVER_NONE;
00973         if (v->overlap && v->pq <= 8) {
00974             v->condover = decode012(gb);
00975             if (v->condover == CONDOVER_SELECT) {
00976                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
00977                 if (status < 0)
00978                     return -1;
00979                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
00980                        "Imode: %i, Invert: %i\n", status>>1, status&1);
00981             }
00982         }
00983         break;
00984     case AV_PICTURE_TYPE_P:
00985         if (v->field_mode) {
00986             v->numref = get_bits1(gb);
00987             if (!v->numref) {
00988                 v->reffield          = get_bits1(gb);
00989                 v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
00990             }
00991         }
00992         if (v->extended_mv)
00993             v->mvrange = get_unary(gb, 0, 3);
00994         else
00995             v->mvrange = 0;
00996         if (v->interlace) {
00997             if (v->extended_dmv)
00998                 v->dmvrange = get_unary(gb, 0, 3);
00999             else
01000                 v->dmvrange = 0;
01001             if (v->fcm == ILACE_FRAME) { // interlaced frame picture
01002                 v->fourmvswitch = get_bits1(gb);
01003                 v->intcomp      = get_bits1(gb);
01004                 if (v->intcomp) {
01005                     v->lumscale = get_bits(gb, 6);
01006                     v->lumshift = get_bits(gb, 6);
01007                     INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
01008                 }
01009                 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01010                 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
01011                        "Imode: %i, Invert: %i\n", status>>1, status&1);
01012                 mbmodetab = get_bits(gb, 2);
01013                 if (v->fourmvswitch)
01014                     v->mbmode_vlc = &ff_vc1_intfr_4mv_mbmode_vlc[mbmodetab];
01015                 else
01016                     v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[mbmodetab];
01017                 imvtab         = get_bits(gb, 2);
01018                 v->imv_vlc     = &ff_vc1_1ref_mvdata_vlc[imvtab];
01019                 // interlaced p-picture cbpcy range is [1, 63]
01020                 icbptab        = get_bits(gb, 3);
01021                 v->cbpcy_vlc   = &ff_vc1_icbpcy_vlc[icbptab];
01022                 twomvbptab     = get_bits(gb, 2);
01023                 v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[twomvbptab];
01024                 if (v->fourmvswitch) {
01025                     fourmvbptab     = get_bits(gb, 2);
01026                     v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
01027                 }
01028             }
01029         }
01030         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
01031         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
01032         v->range_x = 1 << (v->k_x - 1);
01033         v->range_y = 1 << (v->k_y - 1);
01034 
01035         if (v->pq < 5)
01036             v->tt_index = 0;
01037         else if (v->pq < 13)
01038             v->tt_index = 1;
01039         else
01040             v->tt_index = 2;
01041         if (v->fcm != ILACE_FRAME) {
01042             int mvmode;
01043             mvmode     = get_unary(gb, 1, 4);
01044             lowquant   = (v->pq > 12) ? 0 : 1;
01045             v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
01046             if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
01047                 int mvmode2;
01048                 mvmode2 = get_unary(gb, 1, 3);
01049                 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
01050                 if (v->field_mode)
01051                     v->intcompfield = decode210(gb);
01052                 v->lumscale = get_bits(gb, 6);
01053                 v->lumshift = get_bits(gb, 6);
01054                 INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
01055                 if ((v->field_mode) && !v->intcompfield) {
01056                     v->lumscale2 = get_bits(gb, 6);
01057                     v->lumshift2 = get_bits(gb, 6);
01058                     INIT_LUT(v->lumscale2, v->lumshift2, v->luty2, v->lutuv2);
01059                 }
01060                 v->use_ic = 1;
01061             }
01062             v->qs_last = v->s.quarter_sample;
01063             if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
01064                 v->s.quarter_sample = 0;
01065             else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
01066                 if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
01067                     v->s.quarter_sample = 0;
01068                 else
01069                     v->s.quarter_sample = 1;
01070             } else
01071                 v->s.quarter_sample = 1;
01072             v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN
01073                            || (v->mv_mode == MV_PMODE_INTENSITY_COMP
01074                                && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
01075         }
01076         if (v->fcm == PROGRESSIVE) { // progressive
01077             if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
01078                  v->mv_mode2 == MV_PMODE_MIXED_MV)
01079                 || v->mv_mode == MV_PMODE_MIXED_MV) {
01080                 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
01081                 if (status < 0)
01082                     return -1;
01083                 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
01084                        "Imode: %i, Invert: %i\n", status>>1, status&1);
01085             } else {
01086                 v->mv_type_is_raw = 0;
01087                 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
01088             }
01089             status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01090             if (status < 0)
01091                 return -1;
01092             av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01093                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01094 
01095             /* Hopefully this is correct for P frames */
01096             v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
01097             v->cbpcy_vlc        = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01098         } else if (v->fcm == ILACE_FRAME) { // frame interlaced
01099             v->qs_last          = v->s.quarter_sample;
01100             v->s.quarter_sample = 1;
01101             v->s.mspel          = 1;
01102         } else {    // field interlaced
01103             mbmodetab = get_bits(gb, 3);
01104             imvtab = get_bits(gb, 2 + v->numref);
01105             if (!v->numref)
01106                 v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
01107             else
01108                 v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
01109             icbptab = get_bits(gb, 3);
01110             v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
01111             if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
01112                 v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
01113                 fourmvbptab     = get_bits(gb, 2);
01114                 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
01115                 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
01116             } else {
01117                 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
01118             }
01119         }
01120         if (v->dquant) {
01121             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01122             vop_dquant_decoding(v);
01123         }
01124 
01125         v->ttfrm = 0; //FIXME Is that so ?
01126         if (v->vstransform) {
01127             v->ttmbf = get_bits1(gb);
01128             if (v->ttmbf) {
01129                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01130             }
01131         } else {
01132             v->ttmbf = 1;
01133             v->ttfrm = TT_8X8;
01134         }
01135         break;
01136     case AV_PICTURE_TYPE_B:
01137         // TODO: implement interlaced frame B picture decoding
01138         if (v->fcm == ILACE_FRAME)
01139             return -1;
01140         if (v->extended_mv)
01141             v->mvrange = get_unary(gb, 0, 3);
01142         else
01143             v->mvrange = 0;
01144         v->k_x     = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
01145         v->k_y     = v->mvrange + 8; //k_y can be 8 9 10 11
01146         v->range_x = 1 << (v->k_x - 1);
01147         v->range_y = 1 << (v->k_y - 1);
01148 
01149         if (v->pq < 5)
01150             v->tt_index = 0;
01151         else if (v->pq < 13)
01152             v->tt_index = 1;
01153         else
01154             v->tt_index = 2;
01155 
01156         if (v->field_mode) {
01157             int mvmode;
01158             if (v->extended_dmv)
01159                 v->dmvrange = get_unary(gb, 0, 3);
01160             mvmode = get_unary(gb, 1, 3);
01161             lowquant = (v->pq > 12) ? 0 : 1;
01162             v->mv_mode          = ff_vc1_mv_pmode_table2[lowquant][mvmode];
01163             v->qs_last          = v->s.quarter_sample;
01164             v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
01165             v->s.mspel          = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || v->mv_mode == MV_PMODE_1MV_HPEL);
01166             status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
01167             if (status < 0)
01168                 return -1;
01169             av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
01170                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01171             mbmodetab = get_bits(gb, 3);
01172             if (v->mv_mode == MV_PMODE_MIXED_MV)
01173                 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
01174             else
01175                 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
01176             imvtab       = get_bits(gb, 3);
01177             v->imv_vlc   = &ff_vc1_2ref_mvdata_vlc[imvtab];
01178             icbptab      = get_bits(gb, 3);
01179             v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
01180             if (v->mv_mode == MV_PMODE_MIXED_MV) {
01181                 fourmvbptab     = get_bits(gb, 2);
01182                 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
01183             }
01184             v->numref = 1; // interlaced field B pictures are always 2-ref
01185         } else {
01186             v->mv_mode          = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
01187             v->qs_last          = v->s.quarter_sample;
01188             v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
01189             v->s.mspel          = v->s.quarter_sample;
01190             status              = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
01191             if (status < 0)
01192                 return -1;
01193             av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
01194                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01195             status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01196             if (status < 0)
01197                 return -1;
01198             av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01199                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01200             v->s.mv_table_index = get_bits(gb, 2);
01201             v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01202         }
01203 
01204         if (v->dquant) {
01205             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01206             vop_dquant_decoding(v);
01207         }
01208 
01209         v->ttfrm = 0;
01210         if (v->vstransform) {
01211             v->ttmbf = get_bits1(gb);
01212             if (v->ttmbf) {
01213                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01214             }
01215         } else {
01216             v->ttmbf = 1;
01217             v->ttfrm = TT_8X8;
01218         }
01219         break;
01220     }
01221 
01222     /* AC Syntax */
01223     v->c_ac_table_index = decode012(gb);
01224     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
01225         v->y_ac_table_index = decode012(gb);
01226     }
01227     /* DC Syntax */
01228     v->s.dc_table_index = get_bits1(gb);
01229     if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
01230         && v->dquant) {
01231         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01232         vop_dquant_decoding(v);
01233     }
01234 
01235     v->bi_type = 0;
01236     if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
01237         v->s.pict_type = AV_PICTURE_TYPE_B;
01238         v->bi_type = 1;
01239     }
01240     return 0;
01241 }