MythTV: vc1.c Source File

00001 /*
00002  * VC-1 and WMV3 decoder
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 FFmpeg.
00007  *
00008  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00028 #include "dsputil.h"
00029 #include "avcodec.h"
00030 #include "mpegvideo.h"
00031 #include "vc1.h"
00032 #include "vc1data.h"
00033 #include "vc1acdata.h"
00034 #include "msmpeg4data.h"
00035 #include "unary.h"
00036 #include "simple_idct.h"
00037 
00038 #undef NDEBUG
00039 #include <assert.h>
00040 
00041 #define MB_INTRA_VLC_BITS 9
00042 #define DC_VLC_BITS 9
00043 #define AC_VLC_BITS 9
00044 static const uint16_t table_mb_intra[64][2];
00045 
00046 
00047 static inline int decode210(GetBitContext *gb){
00048     if (get_bits1(gb))
00049         return 0;
00050     else
00051         return 2 - get_bits1(gb);
00052 }
00053 
00059 static int vc1_init_common(VC1Context *v)
00060 {
00061     static int done = 0;
00062     int i = 0;
00063 
00064     v->hrd_rate = v->hrd_buffer = NULL;
00065 
00066     /* VLC tables */
00067     if(!done)
00068     {
00069         done = 1;
00070         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
00071                  ff_vc1_bfraction_bits, 1, 1,
00072                  ff_vc1_bfraction_codes, 1, 1, 1);
00073         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
00074                  ff_vc1_norm2_bits, 1, 1,
00075                  ff_vc1_norm2_codes, 1, 1, 1);
00076         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
00077                  ff_vc1_norm6_bits, 1, 1,
00078                  ff_vc1_norm6_codes, 2, 2, 1);
00079         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
00080                  ff_vc1_imode_bits, 1, 1,
00081                  ff_vc1_imode_codes, 1, 1, 1);
00082         for (i=0; i<3; i++)
00083         {
00084             init_vlc(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
00085                      ff_vc1_ttmb_bits[i], 1, 1,
00086                      ff_vc1_ttmb_codes[i], 2, 2, 1);
00087             init_vlc(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
00088                      ff_vc1_ttblk_bits[i], 1, 1,
00089                      ff_vc1_ttblk_codes[i], 1, 1, 1);
00090             init_vlc(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
00091                      ff_vc1_subblkpat_bits[i], 1, 1,
00092                      ff_vc1_subblkpat_codes[i], 1, 1, 1);
00093         }
00094         for(i=0; i<4; i++)
00095         {
00096             init_vlc(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
00097                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,
00098                      ff_vc1_4mv_block_pattern_codes[i], 1, 1, 1);
00099             init_vlc(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
00100                      ff_vc1_cbpcy_p_bits[i], 1, 1,
00101                      ff_vc1_cbpcy_p_codes[i], 2, 2, 1);
00102             init_vlc(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
00103                      ff_vc1_mv_diff_bits[i], 1, 1,
00104                      ff_vc1_mv_diff_codes[i], 2, 2, 1);
00105         }
00106         for(i=0; i<8; i++)
00107             init_vlc(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],
00108                      &vc1_ac_tables[i][0][1], 8, 4,
00109                      &vc1_ac_tables[i][0][0], 8, 4, 1);
00110         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
00111                  &ff_msmp4_mb_i_table[0][1], 4, 2,
00112                  &ff_msmp4_mb_i_table[0][0], 4, 2, 1);
00113     }
00114 
00115     /* Other defaults */
00116     v->pq = -1;
00117     v->mvrange = 0; /* 7.1.1.18, p80 */
00118 
00119     return 0;
00120 }
00121 
00122 /***********************************************************************/
00133 enum Imode {
00134     IMODE_RAW,
00135     IMODE_NORM2,
00136     IMODE_DIFF2,
00137     IMODE_NORM6,
00138     IMODE_DIFF6,
00139     IMODE_ROWSKIP,
00140     IMODE_COLSKIP
00141 }; //imode defines
00143 
00150 static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
00151     int x, y;
00152 
00153     for (y=0; y<height; y++){
00154         if (!get_bits1(gb)) //rowskip
00155             memset(plane, 0, width);
00156         else
00157             for (x=0; x<width; x++)
00158                 plane[x] = get_bits1(gb);
00159         plane += stride;
00160     }
00161 }
00162 
00170 static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
00171     int x, y;
00172 
00173     for (x=0; x<width; x++){
00174         if (!get_bits1(gb)) //colskip
00175             for (y=0; y<height; y++)
00176                 plane[y*stride] = 0;
00177         else
00178             for (y=0; y<height; y++)
00179                 plane[y*stride] = get_bits1(gb);
00180         plane ++;
00181     }
00182 }
00183 
00190 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
00191 {
00192     GetBitContext *gb = &v->s.gb;
00193 
00194     int imode, x, y, code, offset;
00195     uint8_t invert, *planep = data;
00196     int width, height, stride;
00197 
00198     width = v->s.mb_width;
00199     height = v->s.mb_height;
00200     stride = v->s.mb_stride;
00201     invert = get_bits1(gb);
00202     imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
00203 
00204     *raw_flag = 0;
00205     switch (imode)
00206     {
00207     case IMODE_RAW:
00208         //Data is actually read in the MB layer (same for all tests == "raw")
00209         *raw_flag = 1; //invert ignored
00210         return invert;
00211     case IMODE_DIFF2:
00212     case IMODE_NORM2:
00213         if ((height * width) & 1)
00214         {
00215             *planep++ = get_bits1(gb);
00216             offset = 1;
00217         }
00218         else offset = 0;
00219         // decode bitplane as one long line
00220         for (y = offset; y < height * width; y += 2) {
00221             code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
00222             *planep++ = code & 1;
00223             offset++;
00224             if(offset == width) {
00225                 offset = 0;
00226                 planep += stride - width;
00227             }
00228             *planep++ = code >> 1;
00229             offset++;
00230             if(offset == width) {
00231                 offset = 0;
00232                 planep += stride - width;
00233             }
00234         }
00235         break;
00236     case IMODE_DIFF6:
00237     case IMODE_NORM6:
00238         if(!(height % 3) && (width % 3)) { // use 2x3 decoding
00239             for(y = 0; y < height; y+= 3) {
00240                 for(x = width & 1; x < width; x += 2) {
00241                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
00242                     if(code < 0){
00243                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
00244                         return -1;
00245                     }
00246                     planep[x + 0] = (code >> 0) & 1;
00247                     planep[x + 1] = (code >> 1) & 1;
00248                     planep[x + 0 + stride] = (code >> 2) & 1;
00249                     planep[x + 1 + stride] = (code >> 3) & 1;
00250                     planep[x + 0 + stride * 2] = (code >> 4) & 1;
00251                     planep[x + 1 + stride * 2] = (code >> 5) & 1;
00252                 }
00253                 planep += stride * 3;
00254             }
00255             if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
00256         } else { // 3x2
00257             planep += (height & 1) * stride;
00258             for(y = height & 1; y < height; y += 2) {
00259                 for(x = width % 3; x < width; x += 3) {
00260                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
00261                     if(code < 0){
00262                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
00263                         return -1;
00264                     }
00265                     planep[x + 0] = (code >> 0) & 1;
00266                     planep[x + 1] = (code >> 1) & 1;
00267                     planep[x + 2] = (code >> 2) & 1;
00268                     planep[x + 0 + stride] = (code >> 3) & 1;
00269                     planep[x + 1 + stride] = (code >> 4) & 1;
00270                     planep[x + 2 + stride] = (code >> 5) & 1;
00271                 }
00272                 planep += stride * 2;
00273             }
00274             x = width % 3;
00275             if(x) decode_colskip(data  ,             x, height    , stride, &v->s.gb);
00276             if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
00277         }
00278         break;
00279     case IMODE_ROWSKIP:
00280         decode_rowskip(data, width, height, stride, &v->s.gb);
00281         break;
00282     case IMODE_COLSKIP:
00283         decode_colskip(data, width, height, stride, &v->s.gb);
00284         break;
00285     default: break;
00286     }
00287 
00288     /* Applying diff operator */
00289     if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
00290     {
00291         planep = data;
00292         planep[0] ^= invert;
00293         for (x=1; x<width; x++)
00294             planep[x] ^= planep[x-1];
00295         for (y=1; y<height; y++)
00296         {
00297             planep += stride;
00298             planep[0] ^= planep[-stride];
00299             for (x=1; x<width; x++)
00300             {
00301                 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
00302                 else                                 planep[x] ^= planep[x-1];
00303             }
00304         }
00305     }
00306     else if (invert)
00307     {
00308         planep = data;
00309         for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
00310     }
00311     return (imode<<1) + invert;
00312 }
00313  //Bitplane group
00315 
00316 /***********************************************************************/
00320 static int vop_dquant_decoding(VC1Context *v)
00321 {
00322     GetBitContext *gb = &v->s.gb;
00323     int pqdiff;
00324 
00325     //variable size
00326     if (v->dquant == 2)
00327     {
00328         pqdiff = get_bits(gb, 3);
00329         if (pqdiff == 7) v->altpq = get_bits(gb, 5);
00330         else v->altpq = v->pq + pqdiff + 1;
00331     }
00332     else
00333     {
00334         v->dquantfrm = get_bits1(gb);
00335         if ( v->dquantfrm )
00336         {
00337             v->dqprofile = get_bits(gb, 2);
00338             switch (v->dqprofile)
00339             {
00340             case DQPROFILE_SINGLE_EDGE:
00341             case DQPROFILE_DOUBLE_EDGES:
00342                 v->dqsbedge = get_bits(gb, 2);
00343                 break;
00344             case DQPROFILE_ALL_MBS:
00345                 v->dqbilevel = get_bits1(gb);
00346                 if(!v->dqbilevel)
00347                     v->halfpq = 0;
00348             default: break; //Forbidden ?
00349             }
00350             if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
00351             {
00352                 pqdiff = get_bits(gb, 3);
00353                 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
00354                 else v->altpq = v->pq + pqdiff + 1;
00355             }
00356         }
00357     }
00358     return 0;
00359 }
00360 
00363 static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
00364 {
00365     uint8_t *Y;
00366     int ys, us, vs;
00367     DSPContext *dsp = &v->s.dsp;
00368 
00369     if(v->rangeredfrm) {
00370         int i, j, k;
00371         for(k = 0; k < 6; k++)
00372             for(j = 0; j < 8; j++)
00373                 for(i = 0; i < 8; i++)
00374                     block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
00375 
00376     }
00377     ys = v->s.current_picture.linesize[0];
00378     us = v->s.current_picture.linesize[1];
00379     vs = v->s.current_picture.linesize[2];
00380     Y = v->s.dest[0];
00381 
00382     dsp->put_pixels_clamped(block[0], Y, ys);
00383     dsp->put_pixels_clamped(block[1], Y + 8, ys);
00384     Y += ys * 8;
00385     dsp->put_pixels_clamped(block[2], Y, ys);
00386     dsp->put_pixels_clamped(block[3], Y + 8, ys);
00387 
00388     if(!(v->s.flags & CODEC_FLAG_GRAY)) {
00389         dsp->put_pixels_clamped(block[4], v->s.dest[1], us);
00390         dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
00391     }
00392 }
00393 
00397 static void vc1_mc_1mv(VC1Context *v, int dir)
00398 {
00399     MpegEncContext *s = &v->s;
00400     DSPContext *dsp = &v->s.dsp;
00401     uint8_t *srcY, *srcU, *srcV;
00402     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
00403 
00404     if(!v->s.last_picture.data[0])return;
00405 
00406     mx = s->mv[dir][0][0];
00407     my = s->mv[dir][0][1];
00408 
00409     // store motion vectors for further use in B frames
00410     if(s->pict_type == P_TYPE) {
00411         s->current_picture.motion_val[1][s->block_index[0]][0] = mx;
00412         s->current_picture.motion_val[1][s->block_index[0]][1] = my;
00413     }
00414     uvmx = (mx + ((mx & 3) == 3)) >> 1;
00415     uvmy = (my + ((my & 3) == 3)) >> 1;
00416     if(v->fastuvmc) {
00417         uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
00418         uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
00419     }
00420     if(!dir) {
00421         srcY = s->last_picture.data[0];
00422         srcU = s->last_picture.data[1];
00423         srcV = s->last_picture.data[2];
00424     } else {
00425         srcY = s->next_picture.data[0];
00426         srcU = s->next_picture.data[1];
00427         srcV = s->next_picture.data[2];
00428     }
00429 
00430     src_x = s->mb_x * 16 + (mx >> 2);
00431     src_y = s->mb_y * 16 + (my >> 2);
00432     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
00433     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
00434 
00435     if(v->profile != PROFILE_ADVANCED){
00436         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
00437         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
00438         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
00439         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
00440     }else{
00441         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
00442         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
00443         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
00444         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
00445     }
00446 
00447     srcY += src_y * s->linesize + src_x;
00448     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
00449     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
00450 
00451     /* for grayscale we should not try to read from unknown area */
00452     if(s->flags & CODEC_FLAG_GRAY) {
00453         srcU = s->edge_emu_buffer + 18 * s->linesize;
00454         srcV = s->edge_emu_buffer + 18 * s->linesize;
00455     }
00456 
00457     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
00458        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel*3
00459        || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 16 - s->mspel*3){
00460         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
00461 
00462         srcY -= s->mspel * (1 + s->linesize);
00463         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
00464                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
00465         srcY = s->edge_emu_buffer;
00466         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,
00467                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
00468         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
00469                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
00470         srcU = uvbuf;
00471         srcV = uvbuf + 16;
00472         /* if we deal with range reduction we need to scale source blocks */
00473         if(v->rangeredfrm) {
00474             int i, j;
00475             uint8_t *src, *src2;
00476 
00477             src = srcY;
00478             for(j = 0; j < 17 + s->mspel*2; j++) {
00479                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
00480                 src += s->linesize;
00481             }
00482             src = srcU; src2 = srcV;
00483             for(j = 0; j < 9; j++) {
00484                 for(i = 0; i < 9; i++) {
00485                     src[i] = ((src[i] - 128) >> 1) + 128;
00486                     src2[i] = ((src2[i] - 128) >> 1) + 128;
00487                 }
00488                 src += s->uvlinesize;
00489                 src2 += s->uvlinesize;
00490             }
00491         }
00492         /* if we deal with intensity compensation we need to scale source blocks */
00493         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
00494             int i, j;
00495             uint8_t *src, *src2;
00496 
00497             src = srcY;
00498             for(j = 0; j < 17 + s->mspel*2; j++) {
00499                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];
00500                 src += s->linesize;
00501             }
00502             src = srcU; src2 = srcV;
00503             for(j = 0; j < 9; j++) {
00504                 for(i = 0; i < 9; i++) {
00505                     src[i] = v->lutuv[src[i]];
00506                     src2[i] = v->lutuv[src2[i]];
00507                 }
00508                 src += s->uvlinesize;
00509                 src2 += s->uvlinesize;
00510             }
00511         }
00512         srcY += s->mspel * (1 + s->linesize);
00513     }
00514 
00515     if(s->mspel) {
00516         dxy = ((my & 3) << 2) | (mx & 3);
00517         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);
00518         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);
00519         srcY += s->linesize * 8;
00520         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);
00521         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
00522     } else { // hpel mc - always used for luma
00523         dxy = (my & 2) | ((mx & 2) >> 1);
00524 
00525         if(!v->rnd)
00526             dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
00527         else
00528             dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
00529     }
00530 
00531     if(s->flags & CODEC_FLAG_GRAY) return;
00532     /* Chroma MC always uses qpel bilinear */
00533     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
00534     uvmx = (uvmx&3)<<1;
00535     uvmy = (uvmy&3)<<1;
00536     if(!v->rnd){
00537         dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
00538         dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
00539     }else{
00540         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
00541         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
00542     }
00543 }
00544 
00547 static void vc1_mc_4mv_luma(VC1Context *v, int n)
00548 {
00549     MpegEncContext *s = &v->s;
00550     DSPContext *dsp = &v->s.dsp;
00551     uint8_t *srcY;
00552     int dxy, mx, my, src_x, src_y;
00553     int off;
00554 
00555     if(!v->s.last_picture.data[0])return;
00556     mx = s->mv[0][n][0];
00557     my = s->mv[0][n][1];
00558     srcY = s->last_picture.data[0];
00559 
00560     off = s->linesize * 4 * (n&2) + (n&1) * 8;
00561 
00562     src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
00563     src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
00564 
00565     if(v->profile != PROFILE_ADVANCED){
00566         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
00567         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
00568     }else{
00569         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
00570         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
00571     }
00572 
00573     srcY += src_y * s->linesize + src_x;
00574 
00575     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
00576        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 8 - s->mspel*2
00577        || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){
00578         srcY -= s->mspel * (1 + s->linesize);
00579         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,
00580                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
00581         srcY = s->edge_emu_buffer;
00582         /* if we deal with range reduction we need to scale source blocks */
00583         if(v->rangeredfrm) {
00584             int i, j;
00585             uint8_t *src;
00586 
00587             src = srcY;
00588             for(j = 0; j < 9 + s->mspel*2; j++) {
00589                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
00590                 src += s->linesize;
00591             }
00592         }
00593         /* if we deal with intensity compensation we need to scale source blocks */
00594         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
00595             int i, j;
00596             uint8_t *src;
00597 
00598             src = srcY;
00599             for(j = 0; j < 9 + s->mspel*2; j++) {
00600                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];
00601                 src += s->linesize;
00602             }
00603         }
00604         srcY += s->mspel * (1 + s->linesize);
00605     }
00606 
00607     if(s->mspel) {
00608         dxy = ((my & 3) << 2) | (mx & 3);
00609         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);
00610     } else { // hpel mc - always used for luma
00611         dxy = (my & 2) | ((mx & 2) >> 1);
00612         if(!v->rnd)
00613             dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
00614         else
00615             dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
00616     }
00617 }
00618 
00619 static inline int median4(int a, int b, int c, int d)
00620 {
00621     if(a < b) {
00622         if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
00623         else      return (FFMIN(b, c) + FFMAX(a, d)) / 2;
00624     } else {
00625         if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
00626         else      return (FFMIN(a, c) + FFMAX(b, d)) / 2;
00627     }
00628 }
00629 
00630 
00633 static void vc1_mc_4mv_chroma(VC1Context *v)
00634 {
00635     MpegEncContext *s = &v->s;
00636     DSPContext *dsp = &v->s.dsp;
00637     uint8_t *srcU, *srcV;
00638     int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;
00639     int i, idx, tx = 0, ty = 0;
00640     int mvx[4], mvy[4], intra[4];
00641     static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
00642 
00643     if(!v->s.last_picture.data[0])return;
00644     if(s->flags & CODEC_FLAG_GRAY) return;
00645 
00646     for(i = 0; i < 4; i++) {
00647         mvx[i] = s->mv[0][i][0];
00648         mvy[i] = s->mv[0][i][1];
00649         intra[i] = v->mb_type[0][s->block_index[i]];
00650     }
00651 
00652     /* calculate chroma MV vector from four luma MVs */
00653     idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];
00654     if(!idx) { // all blocks are inter
00655         tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
00656         ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
00657     } else if(count[idx] == 1) { // 3 inter blocks
00658         switch(idx) {
00659         case 0x1:
00660             tx = mid_pred(mvx[1], mvx[2], mvx[3]);
00661             ty = mid_pred(mvy[1], mvy[2], mvy[3]);
00662             break;
00663         case 0x2:
00664             tx = mid_pred(mvx[0], mvx[2], mvx[3]);
00665             ty = mid_pred(mvy[0], mvy[2], mvy[3]);
00666             break;
00667         case 0x4:
00668             tx = mid_pred(mvx[0], mvx[1], mvx[3]);
00669             ty = mid_pred(mvy[0], mvy[1], mvy[3]);
00670             break;
00671         case 0x8:
00672             tx = mid_pred(mvx[0], mvx[1], mvx[2]);
00673             ty = mid_pred(mvy[0], mvy[1], mvy[2]);
00674             break;
00675         }
00676     } else if(count[idx] == 2) {
00677         int t1 = 0, t2 = 0;
00678         for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
00679         for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
00680         tx = (mvx[t1] + mvx[t2]) / 2;
00681         ty = (mvy[t1] + mvy[t2]) / 2;
00682     } else {
00683         s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
00684         s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
00685         return; //no need to do MC for inter blocks
00686     }
00687 
00688     s->current_picture.motion_val[1][s->block_index[0]][0] = tx;
00689     s->current_picture.motion_val[1][s->block_index[0]][1] = ty;
00690     uvmx = (tx + ((tx&3) == 3)) >> 1;
00691     uvmy = (ty + ((ty&3) == 3)) >> 1;
00692     if(v->fastuvmc) {
00693         uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
00694         uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
00695     }
00696 
00697     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
00698     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
00699 
00700     if(v->profile != PROFILE_ADVANCED){
00701         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
00702         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
00703     }else{
00704         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
00705         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
00706     }
00707 
00708     srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
00709     srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
00710     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
00711        || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
00712        || (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){
00713         ff_emulated_edge_mc(s->edge_emu_buffer     , srcU, s->uvlinesize, 8+1, 8+1,
00714                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
00715         ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,
00716                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
00717         srcU = s->edge_emu_buffer;
00718         srcV = s->edge_emu_buffer + 16;
00719 
00720         /* if we deal with range reduction we need to scale source blocks */
00721         if(v->rangeredfrm) {
00722             int i, j;
00723             uint8_t *src, *src2;
00724 
00725             src = srcU; src2 = srcV;
00726             for(j = 0; j < 9; j++) {
00727                 for(i = 0; i < 9; i++) {
00728                     src[i] = ((src[i] - 128) >> 1) + 128;
00729                     src2[i] = ((src2[i] - 128) >> 1) + 128;
00730                 }
00731                 src += s->uvlinesize;
00732                 src2 += s->uvlinesize;
00733             }
00734         }
00735         /* if we deal with intensity compensation we need to scale source blocks */
00736         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
00737             int i, j;
00738             uint8_t *src, *src2;
00739 
00740             src = srcU; src2 = srcV;
00741             for(j = 0; j < 9; j++) {
00742                 for(i = 0; i < 9; i++) {
00743                     src[i] = v->lutuv[src[i]];
00744                     src2[i] = v->lutuv[src2[i]];
00745                 }
00746                 src += s->uvlinesize;
00747                 src2 += s->uvlinesize;
00748             }
00749         }
00750     }
00751 
00752     /* Chroma MC always uses qpel bilinear */
00753     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
00754     uvmx = (uvmx&3)<<1;
00755     uvmy = (uvmy&3)<<1;
00756     if(!v->rnd){
00757         dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
00758         dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
00759     }else{
00760         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
00761         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
00762     }
00763 }
00764 
00765 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
00766 
00774 static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
00775 {
00776     VC1Context *v = avctx->priv_data;
00777 
00778     av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
00779     v->profile = get_bits(gb, 2);
00780     if (v->profile == PROFILE_COMPLEX)
00781     {
00782         av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");
00783     }
00784 
00785     if (v->profile == PROFILE_ADVANCED)
00786     {
00787         return decode_sequence_header_adv(v, gb);
00788     }
00789     else
00790     {
00791         v->res_sm = get_bits(gb, 2); //reserved
00792         if (v->res_sm)
00793         {
00794             av_log(avctx, AV_LOG_ERROR,
00795                    "Reserved RES_SM=%i is forbidden\n", v->res_sm);
00796             return -1;
00797         }
00798     }
00799 
00800     // (fps-2)/4 (->30)
00801     v->frmrtq_postproc = get_bits(gb, 3); //common
00802     // (bitrate-32kbps)/64kbps
00803     v->bitrtq_postproc = get_bits(gb, 5); //common
00804     v->s.loop_filter = get_bits1(gb); //common
00805     if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
00806     {
00807         av_log(avctx, AV_LOG_ERROR,
00808                "LOOPFILTER shell not be enabled in simple profile\n");
00809     }
00810 
00811     v->res_x8 = get_bits1(gb); //reserved
00812     v->multires = get_bits1(gb);
00813     v->res_fasttx = get_bits1(gb);
00814     if (!v->res_fasttx)
00815     {
00816         v->s.dsp.vc1_inv_trans_8x8 = simple_idct;
00817     }
00818 
00819     v->fastuvmc =  get_bits1(gb); //common
00820     if (!v->profile && !v->fastuvmc)
00821     {
00822         av_log(avctx, AV_LOG_ERROR,
00823                "FASTUVMC unavailable in Simple Profile\n");
00824         return -1;
00825     }
00826     v->extended_mv =  get_bits1(gb); //common
00827     if (!v->profile && v->extended_mv)
00828     {
00829         av_log(avctx, AV_LOG_ERROR,
00830                "Extended MVs unavailable in Simple Profile\n");
00831         return -1;
00832     }
00833     v->dquant =  get_bits(gb, 2); //common
00834     v->vstransform =  get_bits1(gb); //common
00835 
00836     v->res_transtab = get_bits1(gb);
00837     if (v->res_transtab)
00838     {
00839         av_log(avctx, AV_LOG_ERROR,
00840                "1 for reserved RES_TRANSTAB is forbidden\n");
00841         return -1;
00842     }
00843 
00844     v->overlap = get_bits1(gb); //common
00845 
00846     v->s.resync_marker = get_bits1(gb);
00847     v->rangered = get_bits1(gb);
00848     if (v->rangered && v->profile == PROFILE_SIMPLE)
00849     {
00850         av_log(avctx, AV_LOG_INFO,
00851                "RANGERED should be set to 0 in simple profile\n");
00852     }
00853 
00854     v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
00855     v->quantizer_mode = get_bits(gb, 2); //common
00856 
00857     v->finterpflag = get_bits1(gb); //common
00858     v->res_rtm_flag = get_bits1(gb); //reserved
00859     if (!v->res_rtm_flag)
00860     {
00861 //            av_log(avctx, AV_LOG_ERROR,
00862 //                   "0 for reserved RES_RTM_FLAG is forbidden\n");
00863         av_log(avctx, AV_LOG_ERROR,
00864                "Old WMV3 version detected, only I-frames will be decoded\n");
00865         //return -1;
00866     }
00867     //TODO: figure out what they mean (always 0x402F)
00868     if(!v->res_fasttx) skip_bits(gb, 16);
00869     av_log(avctx, AV_LOG_DEBUG,
00870                "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
00871                "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
00872                "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
00873                "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
00874                v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
00875                v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
00876                v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
00877                v->dquant, v->quantizer_mode, avctx->max_b_frames
00878                );
00879     return 0;
00880 }
00881 
00882 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
00883 {
00884     v->res_rtm_flag = 1;
00885     v->level = get_bits(gb, 3);
00886     if(v->level >= 5)
00887     {
00888         av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
00889     }
00890     v->chromaformat = get_bits(gb, 2);
00891     if (v->chromaformat != 1)
00892     {
00893         av_log(v->s.avctx, AV_LOG_ERROR,
00894                "Only 4:2:0 chroma format supported\n");
00895         return -1;
00896     }
00897 
00898     // (fps-2)/4 (->30)
00899     v->frmrtq_postproc = get_bits(gb, 3); //common
00900     // (bitrate-32kbps)/64kbps
00901     v->bitrtq_postproc = get_bits(gb, 5); //common
00902     v->postprocflag = get_bits1(gb); //common
00903 
00904     v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
00905     v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
00906     v->s.avctx->width = v->s.avctx->coded_width;
00907     v->s.avctx->height = v->s.avctx->coded_height;
00908     v->broadcast = get_bits1(gb);
00909     v->interlace = get_bits1(gb);
00910     v->tfcntrflag = get_bits1(gb);
00911     v->finterpflag = get_bits1(gb);
00912     skip_bits1(gb); // reserved
00913 
00914     v->s.h_edge_pos = v->s.avctx->coded_width;
00915     v->s.v_edge_pos = v->s.avctx->coded_height;
00916 
00917     av_log(v->s.avctx, AV_LOG_DEBUG,
00918                "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
00919                "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
00920                "TFCTRflag=%i, FINTERPflag=%i\n",
00921                v->level, v->frmrtq_postproc, v->bitrtq_postproc,
00922                v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
00923                v->tfcntrflag, v->finterpflag
00924                );
00925 
00926     v->psf = get_bits1(gb);
00927     if(v->psf) { //PsF, 6.1.13
00928         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
00929         return -1;
00930     }
00931     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
00932     if(get_bits1(gb)) { //Display Info - decoding is not affected by it
00933         int w, h, ar = 0;
00934         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
00935         v->s.avctx->width  = v->s.width  = w = get_bits(gb, 14) + 1;
00936         v->s.avctx->height = v->s.height = h = get_bits(gb, 14) + 1;
00937         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
00938         if(get_bits1(gb))
00939             ar = get_bits(gb, 4);
00940         if(ar && ar < 14){
00941             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
00942         }else if(ar == 15){
00943             w = get_bits(gb, 8);
00944             h = get_bits(gb, 8);
00945             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
00946         }
00947 
00948         if(get_bits1(gb)){ //framerate stuff
00949             if(get_bits1(gb)) {
00950                 v->s.avctx->time_base.num = 32;
00951                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
00952             } else {
00953                 int nr, dr;
00954                 nr = get_bits(gb, 8);
00955                 dr = get_bits(gb, 4);
00956                 if(nr && nr < 8 && dr && dr < 3){
00957                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
00958                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
00959                 }
00960             }
00961         }
00962 
00963         if(get_bits1(gb)){
00964             v->color_prim = get_bits(gb, 8);
00965             v->transfer_char = get_bits(gb, 8);
00966             v->matrix_coef = get_bits(gb, 8);
00967         }
00968     }
00969 
00970     v->hrd_param_flag = get_bits1(gb);
00971     if(v->hrd_param_flag) {
00972         int i;
00973         v->hrd_num_leaky_buckets = get_bits(gb, 5);
00974         skip_bits(gb, 4); //bitrate exponent
00975         skip_bits(gb, 4); //buffer size exponent
00976         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
00977             skip_bits(gb, 16); //hrd_rate[n]
00978             skip_bits(gb, 16); //hrd_buffer[n]
00979         }
00980     }
00981     return 0;
00982 }
00983 
00984 static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
00985 {
00986     VC1Context *v = avctx->priv_data;
00987     int i, blink, clentry, refdist;
00988 
00989     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
00990     blink = get_bits1(gb); // broken link
00991     clentry = get_bits1(gb); // closed entry
00992     v->panscanflag = get_bits1(gb);
00993     refdist = get_bits1(gb); // refdist flag
00994     v->s.loop_filter = get_bits1(gb);
00995     v->fastuvmc = get_bits1(gb);
00996     v->extended_mv = get_bits1(gb);
00997     v->dquant = get_bits(gb, 2);
00998     v->vstransform = get_bits1(gb);
00999     v->overlap = get_bits1(gb);
01000     v->quantizer_mode = get_bits(gb, 2);
01001 
01002     if(v->hrd_param_flag){
01003         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
01004             skip_bits(gb, 8); //hrd_full[n]
01005         }
01006     }
01007 
01008     if(get_bits1(gb)){
01009         avctx->coded_width = (get_bits(gb, 12)+1)<<1;
01010         avctx->coded_height = (get_bits(gb, 12)+1)<<1;
01011     }
01012     if(v->extended_mv)
01013         v->extended_dmv = get_bits1(gb);
01014     if(get_bits1(gb)) {
01015         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
01016         skip_bits(gb, 3); // Y range, ignored for now
01017     }
01018     if(get_bits1(gb)) {
01019         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
01020         skip_bits(gb, 3); // UV range, ignored for now
01021     }
01022 
01023     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
01024         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
01025         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
01026         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
01027         blink, clentry, v->panscanflag, refdist, v->s.loop_filter,
01028         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
01029 
01030     return 0;
01031 }
01032 
01033 static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
01034 {
01035     int pqindex, lowquant, status;
01036 
01037     if(v->finterpflag) v->interpfrm = get_bits1(gb);
01038     skip_bits(gb, 2); //framecnt unused
01039     v->rangeredfrm = 0;
01040     if (v->rangered) v->rangeredfrm = get_bits1(gb);
01041     v->s.pict_type = get_bits1(gb);
01042     if (v->s.avctx->max_b_frames) {
01043         if (!v->s.pict_type) {
01044             if (get_bits1(gb)) v->s.pict_type = I_TYPE;
01045             else v->s.pict_type = B_TYPE;
01046         } else v->s.pict_type = P_TYPE;
01047     } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;
01048 
01049     v->bi_type = 0;
01050     if(v->s.pict_type == B_TYPE) {
01051         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
01052         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
01053         if(v->bfraction == 0) {
01054             v->s.pict_type = BI_TYPE;
01055         }
01056     }
01057     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
01058         skip_bits(gb, 7); // skip buffer fullness
01059 
01060     /* calculate RND */
01061     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
01062         v->rnd = 1;
01063     if(v->s.pict_type == P_TYPE)
01064         v->rnd ^= 1;
01065 
01066     /* Quantizer stuff */
01067     pqindex = get_bits(gb, 5);
01068     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
01069         v->pq = ff_vc1_pquant_table[0][pqindex];
01070     else
01071         v->pq = ff_vc1_pquant_table[1][pqindex];
01072 
01073     v->pquantizer = 1;
01074     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
01075         v->pquantizer = pqindex < 9;
01076     if (v->quantizer_mode == QUANT_NON_UNIFORM)
01077         v->pquantizer = 0;
01078     v->pqindex = pqindex;
01079     if (pqindex < 9) v->halfpq = get_bits1(gb);
01080     else v->halfpq = 0;
01081     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
01082         v->pquantizer = get_bits1(gb);
01083     v->dquantfrm = 0;
01084     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
01085     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
01086     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
01087     v->range_x = 1 << (v->k_x - 1);
01088     v->range_y = 1 << (v->k_y - 1);
01089     if (v->profile == PROFILE_ADVANCED)
01090     {
01091         if (v->postprocflag) v->postproc = get_bits1(gb);
01092     }
01093     else
01094         if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);
01095 
01096     if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){
01097         v->x8_type = get_bits1(gb);
01098     }else v->x8_type = 0;
01099 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
01100 //        (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
01101 
01102     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
01103 
01104     switch(v->s.pict_type) {
01105     case P_TYPE:
01106         if (v->pq < 5) v->tt_index = 0;
01107         else if(v->pq < 13) v->tt_index = 1;
01108         else v->tt_index = 2;
01109 
01110         lowquant = (v->pq > 12) ? 0 : 1;
01111         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
01112         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
01113         {
01114             int scale, shift, i;
01115             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
01116             v->lumscale = get_bits(gb, 6);
01117             v->lumshift = get_bits(gb, 6);
01118             v->use_ic = 1;
01119             /* fill lookup tables for intensity compensation */
01120             if(!v->lumscale) {
01121                 scale = -64;
01122                 shift = (255 - v->lumshift * 2) << 6;
01123                 if(v->lumshift > 31)
01124                     shift += 128 << 6;
01125             } else {
01126                 scale = v->lumscale + 32;
01127                 if(v->lumshift > 31)
01128                     shift = (v->lumshift - 64) << 6;
01129                 else
01130                     shift = v->lumshift << 6;
01131             }
01132             for(i = 0; i < 256; i++) {
01133                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
01134                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
01135             }
01136         }
01137         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
01138             v->s.quarter_sample = 0;
01139         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
01140             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
01141                 v->s.quarter_sample = 0;
01142             else
01143                 v->s.quarter_sample = 1;
01144         } else
01145             v->s.quarter_sample = 1;
01146         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));
01147 
01148         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
01149                  v->mv_mode2 == MV_PMODE_MIXED_MV)
01150                 || v->mv_mode == MV_PMODE_MIXED_MV)
01151         {
01152             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
01153             if (status < 0) return -1;
01154             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
01155                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01156         } else {
01157             v->mv_type_is_raw = 0;
01158             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
01159         }
01160         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01161         if (status < 0) return -1;
01162         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01163                "Imode: %i, Invert: %i\n", status>>1, status&1);
01164 
01165         /* Hopefully this is correct for P frames */
01166         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
01167         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01168 
01169         if (v->dquant)
01170         {
01171             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01172             vop_dquant_decoding(v);
01173         }
01174 
01175         v->ttfrm = 0; //FIXME Is that so ?
01176         if (v->vstransform)
01177         {
01178             v->ttmbf = get_bits1(gb);
01179             if (v->ttmbf)
01180             {
01181                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01182             }
01183         } else {
01184             v->ttmbf = 1;
01185             v->ttfrm = TT_8X8;
01186         }
01187         break;
01188     case B_TYPE:
01189         if (v->pq < 5) v->tt_index = 0;
01190         else if(v->pq < 13) v->tt_index = 1;
01191         else v->tt_index = 2;
01192 
01193         lowquant = (v->pq > 12) ? 0 : 1;
01194         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
01195         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
01196         v->s.mspel = v->s.quarter_sample;
01197 
01198         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
01199         if (status < 0) return -1;
01200         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
01201                "Imode: %i, Invert: %i\n", status>>1, status&1);
01202         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01203         if (status < 0) return -1;
01204         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01205                "Imode: %i, Invert: %i\n", status>>1, status&1);
01206 
01207         v->s.mv_table_index = get_bits(gb, 2);
01208         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01209 
01210         if (v->dquant)
01211         {
01212             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01213             vop_dquant_decoding(v);
01214         }
01215 
01216         v->ttfrm = 0;
01217         if (v->vstransform)
01218         {
01219             v->ttmbf = get_bits1(gb);
01220             if (v->ttmbf)
01221             {
01222                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01223             }
01224         } else {
01225             v->ttmbf = 1;
01226             v->ttfrm = TT_8X8;
01227         }
01228         break;
01229     }
01230 
01231     if(!v->x8_type)
01232     {
01233         /* AC Syntax */
01234         v->c_ac_table_index = decode012(gb);
01235         if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
01236         {
01237             v->y_ac_table_index = decode012(gb);
01238         }
01239         /* DC Syntax */
01240         v->s.dc_table_index = get_bits1(gb);
01241     }
01242 
01243     if(v->s.pict_type == BI_TYPE) {
01244         v->s.pict_type = B_TYPE;
01245         v->bi_type = 1;
01246     }
01247     return 0;
01248 }
01249 
01250 static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
01251 {
01252     int pqindex, lowquant;
01253     int status;
01254 
01255     v->p_frame_skipped = 0;
01256 
01257     if(v->interlace){
01258         v->fcm = decode012(gb);
01259         if(v->fcm) return -1; // interlaced frames/fields are not implemented
01260     }
01261     switch(get_unary(gb, 0, 4)) {
01262     case 0:
01263         v->s.pict_type = P_TYPE;
01264         break;
01265     case 1:
01266         v->s.pict_type = B_TYPE;
01267         break;
01268     case 2:
01269         v->s.pict_type = I_TYPE;
01270         break;
01271     case 3:
01272         v->s.pict_type = BI_TYPE;
01273         break;
01274     case 4:
01275         v->s.pict_type = P_TYPE; // skipped pic
01276         v->p_frame_skipped = 1;
01277         return 0;
01278     }
01279     if(v->tfcntrflag)
01280         skip_bits(gb, 8);
01281     if(v->broadcast) {
01282         if(!v->interlace || v->psf) {
01283             v->rptfrm = get_bits(gb, 2);
01284         } else {
01285             v->tff = get_bits1(gb);
01286             v->rptfrm = get_bits1(gb);
01287         }
01288     }
01289     if(v->panscanflag) {
01290         //...
01291     }
01292     v->rnd = get_bits1(gb);
01293     if(v->interlace)
01294         v->uvsamp = get_bits1(gb);
01295     if(v->finterpflag) v->interpfrm = get_bits1(gb);
01296     if(v->s.pict_type == B_TYPE) {
01297         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
01298         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
01299         if(v->bfraction == 0) {
01300             v->s.pict_type = BI_TYPE; /* XXX: should not happen here */
01301         }
01302     }
01303     pqindex = get_bits(gb, 5);
01304     v->pqindex = pqindex;
01305     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
01306         v->pq = ff_vc1_pquant_table[0][pqindex];
01307     else
01308         v->pq = ff_vc1_pquant_table[1][pqindex];
01309 
01310     v->pquantizer = 1;
01311     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
01312         v->pquantizer = pqindex < 9;
01313     if (v->quantizer_mode == QUANT_NON_UNIFORM)
01314         v->pquantizer = 0;
01315     v->pqindex = pqindex;
01316     if (pqindex < 9) v->halfpq = get_bits1(gb);
01317     else v->halfpq = 0;
01318     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
01319         v->pquantizer = get_bits1(gb);
01320 
01321     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
01322 
01323     switch(v->s.pict_type) {
01324     case I_TYPE:
01325     case BI_TYPE:
01326         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
01327         if (status < 0) return -1;
01328         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
01329                 "Imode: %i, Invert: %i\n", status>>1, status&1);
01330         v->condover = CONDOVER_NONE;
01331         if(v->overlap && v->pq <= 8) {
01332             v->condover = decode012(gb);
01333             if(v->condover == CONDOVER_SELECT) {
01334                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
01335                 if (status < 0) return -1;
01336                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
01337                         "Imode: %i, Invert: %i\n", status>>1, status&1);
01338             }
01339         }
01340         break;
01341     case P_TYPE:
01342         if(v->postprocflag)
01343             v->postproc = get_bits1(gb);
01344         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
01345         else v->mvrange = 0;
01346         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
01347         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
01348         v->range_x = 1 << (v->k_x - 1);
01349         v->range_y = 1 << (v->k_y - 1);
01350 
01351         if (v->pq < 5) v->tt_index = 0;
01352         else if(v->pq < 13) v->tt_index = 1;
01353         else v->tt_index = 2;
01354 
01355         lowquant = (v->pq > 12) ? 0 : 1;
01356         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
01357         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
01358         {
01359             int scale, shift, i;
01360             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
01361             v->lumscale = get_bits(gb, 6);
01362             v->lumshift = get_bits(gb, 6);
01363             /* fill lookup tables for intensity compensation */
01364             if(!v->lumscale) {
01365                 scale = -64;
01366                 shift = (255 - v->lumshift * 2) << 6;
01367                 if(v->lumshift > 31)
01368                     shift += 128 << 6;
01369             } else {
01370                 scale = v->lumscale + 32;
01371                 if(v->lumshift > 31)
01372                     shift = (v->lumshift - 64) << 6;
01373                 else
01374                     shift = v->lumshift << 6;
01375             }
01376             for(i = 0; i < 256; i++) {
01377                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
01378                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
01379             }
01380             v->use_ic = 1;
01381         }
01382         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
01383             v->s.quarter_sample = 0;
01384         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
01385             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
01386                 v->s.quarter_sample = 0;
01387             else
01388                 v->s.quarter_sample = 1;
01389         } else
01390             v->s.quarter_sample = 1;
01391         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));
01392 
01393         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
01394                  v->mv_mode2 == MV_PMODE_MIXED_MV)
01395                 || v->mv_mode == MV_PMODE_MIXED_MV)
01396         {
01397             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
01398             if (status < 0) return -1;
01399             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
01400                    "Imode: %i, Invert: %i\n", status>>1, status&1);
01401         } else {
01402             v->mv_type_is_raw = 0;
01403             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
01404         }
01405         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01406         if (status < 0) return -1;
01407         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01408                "Imode: %i, Invert: %i\n", status>>1, status&1);
01409 
01410         /* Hopefully this is correct for P frames */
01411         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
01412         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01413         if (v->dquant)
01414         {
01415             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01416             vop_dquant_decoding(v);
01417         }
01418 
01419         v->ttfrm = 0; //FIXME Is that so ?
01420         if (v->vstransform)
01421         {
01422             v->ttmbf = get_bits1(gb);
01423             if (v->ttmbf)
01424             {
01425                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01426             }
01427         } else {
01428             v->ttmbf = 1;
01429             v->ttfrm = TT_8X8;
01430         }
01431         break;
01432     case B_TYPE:
01433         if(v->postprocflag)
01434             v->postproc = get_bits1(gb);
01435         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
01436         else v->mvrange = 0;
01437         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
01438         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
01439         v->range_x = 1 << (v->k_x - 1);
01440         v->range_y = 1 << (v->k_y - 1);
01441 
01442         if (v->pq < 5) v->tt_index = 0;
01443         else if(v->pq < 13) v->tt_index = 1;
01444         else v->tt_index = 2;
01445 
01446         lowquant = (v->pq > 12) ? 0 : 1;
01447         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
01448         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
01449         v->s.mspel = v->s.quarter_sample;
01450 
01451         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
01452         if (status < 0) return -1;
01453         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
01454                "Imode: %i, Invert: %i\n", status>>1, status&1);
01455         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
01456         if (status < 0) return -1;
01457         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
01458                "Imode: %i, Invert: %i\n", status>>1, status&1);
01459 
01460         v->s.mv_table_index = get_bits(gb, 2);
01461         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
01462 
01463         if (v->dquant)
01464         {
01465             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01466             vop_dquant_decoding(v);
01467         }
01468 
01469         v->ttfrm = 0;
01470         if (v->vstransform)
01471         {
01472             v->ttmbf = get_bits1(gb);
01473             if (v->ttmbf)
01474             {
01475                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
01476             }
01477         } else {
01478             v->ttmbf = 1;
01479             v->ttfrm = TT_8X8;
01480         }
01481         break;
01482     }
01483 
01484     /* AC Syntax */
01485     v->c_ac_table_index = decode012(gb);
01486     if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
01487     {
01488         v->y_ac_table_index = decode012(gb);
01489     }
01490     /* DC Syntax */
01491     v->s.dc_table_index = get_bits1(gb);
01492     if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {
01493         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
01494         vop_dquant_decoding(v);
01495     }
01496 
01497     v->bi_type = 0;
01498     if(v->s.pict_type == BI_TYPE) {
01499         v->s.pict_type = B_TYPE;
01500         v->bi_type = 1;
01501     }
01502     return 0;
01503 }
01504 
01505 /***********************************************************************/
01516 #define GET_MQUANT()                                           \
01517   if (v->dquantfrm)                                            \
01518   {                                                            \
01519     int edges = 0;                                             \
01520     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \
01521     {                                                          \
01522       if (v->dqbilevel)                                        \
01523       {                                                        \
01524         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \
01525       }                                                        \
01526       else                                                     \
01527       {                                                        \
01528         mqdiff = get_bits(gb, 3);                              \
01529         if (mqdiff != 7) mquant = v->pq + mqdiff;              \
01530         else mquant = get_bits(gb, 5);                         \
01531       }                                                        \
01532     }                                                          \
01533     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \
01534         edges = 1 << v->dqsbedge;                              \
01535     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \
01536         edges = (3 << v->dqsbedge) % 15;                       \
01537     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \
01538         edges = 15;                                            \
01539     if((edges&1) && !s->mb_x)                                  \
01540         mquant = v->altpq;                                     \
01541     if((edges&2) && s->first_slice_line)                       \
01542         mquant = v->altpq;                                     \
01543     if((edges&4) && s->mb_x == (s->mb_width - 1))              \
01544         mquant = v->altpq;                                     \
01545     if((edges&8) && s->mb_y == (s->mb_height - 1))             \
01546         mquant = v->altpq;                                     \
01547   }
01548 
01556 #define GET_MVDATA(_dmv_x, _dmv_y)                                  \
01557   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\
01558                        VC1_MV_DIFF_VLC_BITS, 2);                    \
01559   if (index > 36)                                                   \
01560   {                                                                 \
01561     mb_has_coeffs = 1;                                              \
01562     index -= 37;                                                    \
01563   }                                                                 \
01564   else mb_has_coeffs = 0;                                           \
01565   s->mb_intra = 0;                                                  \
01566   if (!index) { _dmv_x = _dmv_y = 0; }                              \
01567   else if (index == 35)                                             \
01568   {                                                                 \
01569     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \
01570     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \
01571   }                                                                 \
01572   else if (index == 36)                                             \
01573   {                                                                 \
01574     _dmv_x = 0;                                                     \
01575     _dmv_y = 0;                                                     \
01576     s->mb_intra = 1;                                                \
01577   }                                                                 \
01578   else                                                              \
01579   {                                                                 \
01580     index1 = index%6;                                               \
01581     if (!s->quarter_sample && index1 == 5) val = 1;                 \
01582     else                                   val = 0;                 \
01583     if(size_table[index1] - val > 0)                                \
01584         val = get_bits(gb, size_table[index1] - val);               \
01585     else                                   val = 0;                 \
01586     sign = 0 - (val&1);                                             \
01587     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \
01588                                                                     \
01589     index1 = index/6;                                               \
01590     if (!s->quarter_sample && index1 == 5) val = 1;                 \
01591     else                                   val = 0;                 \
01592     if(size_table[index1] - val > 0)                                \
01593         val = get_bits(gb, size_table[index1] - val);               \
01594     else                                   val = 0;                 \
01595     sign = 0 - (val&1);                                             \
01596     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \
01597   }
01598 
01601 static inline void vc1_pred_mv(MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t* is_intra)
01602 {
01603     int xy, wrap, off = 0;
01604     int16_t *A, *B, *C;
01605     int px, py;
01606     int sum;
01607 
01608     /* scale MV difference to be quad-pel */
01609     dmv_x <<= 1 - s->quarter_sample;
01610     dmv_y <<= 1 - s->quarter_sample;
01611 
01612     wrap = s->b8_stride;
01613     xy = s->block_index[n];
01614 
01615     if(s->mb_intra){
01616         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
01617         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
01618         s->current_picture.motion_val[1][xy][0] = 0;
01619         s->current_picture.motion_val[1][xy][1] = 0;
01620         if(mv1) { /* duplicate motion data for 1-MV block */
01621             s->current_picture.motion_val[0][xy + 1][0] = 0;
01622             s->current_picture.motion_val[0][xy + 1][1] = 0;
01623             s->current_picture.motion_val[0][xy + wrap][0] = 0;
01624             s->current_picture.motion_val[0][xy + wrap][1] = 0;
01625             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
01626             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
01627             s->current_picture.motion_val[1][xy + 1][0] = 0;
01628             s->current_picture.motion_val[1][xy + 1][1] = 0;
01629             s->current_picture.motion_val[1][xy + wrap][0] = 0;
01630             s->current_picture.motion_val[1][xy + wrap][1] = 0;
01631             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;
01632             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;
01633         }
01634         return;
01635     }
01636 
01637     C = s->current_picture.motion_val[0][xy - 1];
01638     A = s->current_picture.motion_val[0][xy - wrap];
01639     if(mv1)
01640         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
01641     else {
01642         //in 4-MV mode different blocks have different B predictor position
01643         switch(n){
01644         case 0:
01645             off = (s->mb_x > 0) ? -1 : 1;
01646             break;
01647         case 1:
01648             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
01649             break;
01650         case 2:
01651             off = 1;
01652             break;
01653         case 3:
01654             off = -1;
01655         }
01656     }
01657     B = s->current_picture.motion_val[0][xy - wrap + off];
01658 
01659     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds
01660         if(s->mb_width == 1) {
01661             px = A[0];
01662             py = A[1];
01663         } else {
01664             px = mid_pred(A[0], B[0], C[0]);
01665             py = mid_pred(A[1], B[1], C[1]);
01666         }
01667     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds
01668         px = C[0];
01669         py = C[1];
01670     } else {
01671         px = py = 0;
01672     }
01673     /* Pullback MV as specified in 8.3.5.3.4 */
01674     {
01675         int qx, qy, X, Y;
01676         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);
01677         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);
01678         X = (s->mb_width << 6) - 4;
01679         Y = (s->mb_height << 6) - 4;
01680         if(mv1) {
01681             if(qx + px < -60) px = -60 - qx;
01682             if(qy + py < -60) py = -60 - qy;
01683         } else {
01684             if(qx + px < -28) px = -28 - qx;
01685             if(qy + py < -28) py = -28 - qy;
01686         }
01687         if(qx + px > X) px = X - qx;
01688         if(qy + py > Y) py = Y - qy;
01689     }
01690     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
01691     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {
01692         if(is_intra[xy - wrap])
01693             sum = FFABS(px) + FFABS(py);
01694         else
01695             sum = FFABS(px - A[0]) + FFABS(py - A[1]);
01696         if(sum > 32) {
01697             if(get_bits1(&s->gb)) {
01698                 px = A[0];
01699                 py = A[1];
01700             } else {
01701                 px = C[0];
01702                 py = C[1];
01703             }
01704         } else {
01705             if(is_intra[xy - 1])
01706                 sum = FFABS(px) + FFABS(py);
01707             else
01708                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
01709             if(sum > 32) {
01710                 if(get_bits1(&s->gb)) {
01711                     px = A[0];
01712                     py = A[1];
01713                 } else {
01714                     px = C[0];
01715                     py = C[1];
01716                 }
01717             }
01718         }
01719     }
01720     /* store MV using signed modulus of MV range defined in 4.11 */
01721     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
01722     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
01723     if(mv1) { /* duplicate motion data for 1-MV block */
01724         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];
01725         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];
01726         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];
01727         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];
01728         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];
01729         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];
01730     }
01731 }
01732 
01735 static void vc1_interp_mc(VC1Context *v)
01736 {
01737     MpegEncContext *s = &v->s;
01738     DSPContext *dsp = &v->s.dsp;
01739     uint8_t *srcY, *srcU, *srcV;
01740     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
01741 
01742     if(!v->s.next_picture.data[0])return;
01743 
01744     mx = s->mv[1][0][0];
01745     my = s->mv[1][0][1];
01746     uvmx = (mx + ((mx & 3) == 3)) >> 1;
01747     uvmy = (my + ((my & 3) == 3)) >> 1;
01748     if(v->fastuvmc) {
01749         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
01750         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
01751     }
01752     srcY = s->next_picture.data[0];
01753     srcU = s->next_picture.data[1];
01754     srcV = s->next_picture.data[2];
01755 
01756     src_x = s->mb_x * 16 + (mx >> 2);
01757     src_y = s->mb_y * 16 + (my >> 2);
01758     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
01759     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
01760 
01761     if(v->profile != PROFILE_ADVANCED){
01762         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
01763         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
01764         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
01765         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
01766     }else{
01767         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
01768         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
01769         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
01770         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
01771     }
01772 
01773     srcY += src_y * s->linesize + src_x;
01774     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
01775     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
01776 
01777     /* for grayscale we should not try to read from unknown area */
01778     if(s->flags & CODEC_FLAG_GRAY) {
01779         srcU = s->edge_emu_buffer + 18 * s->linesize;
01780         srcV = s->edge_emu_buffer + 18 * s->linesize;
01781     }
01782 
01783     if(v->rangeredfrm
01784        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
01785        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
01786         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
01787 
01788         srcY -= s->mspel * (1 + s->linesize);
01789         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
01790                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
01791         srcY = s->edge_emu_buffer;
01792         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,
01793                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
01794         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
01795                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
01796         srcU = uvbuf;
01797         srcV = uvbuf + 16;
01798         /* if we deal with range reduction we need to scale source blocks */
01799         if(v->rangeredfrm) {
01800             int i, j;
01801             uint8_t *src, *src2;
01802 
01803             src = srcY;
01804             for(j = 0; j < 17 + s->mspel*2; j++) {
01805                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
01806                 src += s->linesize;
01807             }
01808             src = srcU; src2 = srcV;
01809             for(j = 0; j < 9; j++) {
01810                 for(i = 0; i < 9; i++) {
01811                     src[i] = ((src[i] - 128) >> 1) + 128;
01812                     src2[i] = ((src2[i] - 128) >> 1) + 128;
01813                 }
01814                 src += s->uvlinesize;
01815                 src2 += s->uvlinesize;
01816             }
01817         }
01818         srcY += s->mspel * (1 + s->linesize);
01819     }
01820 
01821     mx >>= 1;
01822     my >>= 1;
01823     dxy = ((my & 1) << 1) | (mx & 1);
01824 
01825     dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
01826 
01827     if(s->flags & CODEC_FLAG_GRAY) return;
01828     /* Chroma MC always uses qpel blilinear */
01829     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
01830     uvmx = (uvmx&3)<<1;
01831     uvmy = (uvmy&3)<<1;
01832     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
01833     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
01834 }
01835 
01836 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
01837 {
01838     int n = bfrac;
01839 
01840 #if B_FRACTION_DEN==256
01841     if(inv)
01842         n -= 256;
01843     if(!qs)
01844         return 2 * ((value * n + 255) >> 9);
01845     return (value * n + 128) >> 8;
01846 #else
01847     if(inv)
01848         n -= B_FRACTION_DEN;
01849     if(!qs)
01850         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
01851     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
01852 #endif
01853 }
01854 
01857 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
01858 {
01859     if(v->use_ic) {
01860         v->mv_mode2 = v->mv_mode;
01861         v->mv_mode = MV_PMODE_INTENSITY_COMP;
01862     }
01863     if(direct) {
01864         vc1_mc_1mv(v, 0);
01865         vc1_interp_mc(v);
01866         if(v->use_ic) v->mv_mode = v->mv_mode2;
01867         return;
01868     }
01869     if(mode == BMV_TYPE_INTERPOLATED) {
01870         vc1_mc_1mv(v, 0);
01871         vc1_interp_mc(v);
01872         if(v->use_ic) v->mv_mode = v->mv_mode2;
01873         return;
01874     }
01875 
01876     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;
01877     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
01878     if(v->use_ic) v->mv_mode = v->mv_mode2;
01879 }
01880 
01881 static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
01882 {
01883     MpegEncContext *s = &v->s;
01884     int xy, wrap, off = 0;
01885     int16_t *A, *B, *C;
01886     int px, py;
01887     int sum;
01888     int r_x, r_y;
01889     const uint8_t *is_intra = v->mb_type[0];
01890 
01891     r_x = v->range_x;
01892     r_y = v->range_y;
01893     /* scale MV difference to be quad-pel */
01894     dmv_x[0] <<= 1 - s->quarter_sample;
01895     dmv_y[0] <<= 1 - s->quarter_sample;
01896     dmv_x[1] <<= 1 - s->quarter_sample;
01897     dmv_y[1] <<= 1 - s->quarter_sample;
01898 
01899     wrap = s->b8_stride;
01900     xy = s->block_index[0];
01901 
01902     if(s->mb_intra) {
01903         s->current_picture.motion_val[0][xy][0] =
01904         s->current_picture.motion_val[0][xy][1] =
01905         s->current_picture.motion_val[1][xy][0] =
01906         s->current_picture.motion_val[1][xy][1] = 0;
01907         return;
01908     }
01909     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
01910     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
01911     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
01912     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);
01913 
01914     /* Pullback predicted motion vectors as specified in 8.4.5.4 */
01915     s->mv[0][0][0] = av_clip(s->mv[0][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));
01916     s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
01917     s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));
01918     s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
01919     if(direct) {
01920         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
01921         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
01922         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
01923         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
01924         return;
01925     }
01926 
01927     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
01928         C = s->current_picture.motion_val[0][xy - 2];
01929         A = s->current_picture.motion_val[0][xy - wrap*2];
01930         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
01931         B = s->current_picture.motion_val[0][xy - wrap*2 + off];
01932 
01933         if(!s->mb_x) C[0] = C[1] = 0;
01934         if(!s->first_slice_line) { // predictor A is not out of bounds
01935             if(s->mb_width == 1) {
01936                 px = A[0];
01937                 py = A[1];
01938             } else {
01939                 px = mid_pred(A[0], B[0], C[0]);
01940                 py = mid_pred(A[1], B[1], C[1]);
01941             }
01942         } else if(s->mb_x) { // predictor C is not out of bounds
01943             px = C[0];
01944             py = C[1];
01945         } else {
01946             px = py = 0;
01947         }
01948         /* Pullback MV as specified in 8.3.5.3.4 */
01949         {
01950             int qx, qy, X, Y;
01951             if(v->profile < PROFILE_ADVANCED) {
01952                 qx = (s->mb_x << 5);
01953                 qy = (s->mb_y << 5);
01954                 X = (s->mb_width << 5) - 4;
01955                 Y = (s->mb_height << 5) - 4;
01956                 if(qx + px < -28) px = -28 - qx;
01957                 if(qy + py < -28) py = -28 - qy;
01958                 if(qx + px > X) px = X - qx;
01959                 if(qy + py > Y) py = Y - qy;
01960             } else {
01961                 qx = (s->mb_x << 6);
01962                 qy = (s->mb_y << 6);
01963                 X = (s->mb_width << 6) - 4;
01964                 Y = (s->mb_height << 6) - 4;
01965                 if(qx + px < -60) px = -60 - qx;
01966                 if(qy + py < -60) py = -60 - qy;
01967                 if(qx + px > X) px = X - qx;
01968                 if(qy + py > Y) py = Y - qy;
01969             }
01970         }
01971         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
01972         if(0 && !s->first_slice_line && s->mb_x) {
01973             if(is_intra[xy - wrap])
01974                 sum = FFABS(px) + FFABS(py);
01975             else
01976                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
01977             if(sum > 32) {
01978                 if(get_bits1(&s->gb)) {
01979                     px = A[0];
01980                     py = A[1];
01981                 } else {
01982                     px = C[0];
01983                     py = C[1];
01984                 }
01985             } else {
01986                 if(is_intra[xy - 2])
01987                     sum = FFABS(px) + FFABS(py);
01988                 else
01989                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);
01990                 if(sum > 32) {
01991                     if(get_bits1(&s->gb)) {
01992                         px = A[0];
01993                         py = A[1];
01994                     } else {
01995                         px = C[0];
01996                         py = C[1];
01997                     }
01998                 }
01999             }
02000         }
02001         /* store MV using signed modulus of MV range defined in 4.11 */
02002         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;
02003         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;
02004     }
02005     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
02006         C = s->current_picture.motion_val[1][xy - 2];
02007         A = s->current_picture.motion_val[1][xy - wrap*2];
02008         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
02009         B = s->current_picture.motion_val[1][xy - wrap*2 + off];
02010 
02011         if(!s->mb_x) C[0] = C[1] = 0;
02012         if(!s->first_slice_line) { // predictor A is not out of bounds
02013             if(s->mb_width == 1) {
02014                 px = A[0];
02015                 py = A[1];
02016             } else {
02017                 px = mid_pred(A[0], B[0], C[0]);
02018                 py = mid_pred(A[1], B[1], C[1]);
02019             }
02020         } else if(s->mb_x) { // predictor C is not out of bounds
02021             px = C[0];
02022             py = C[1];
02023         } else {
02024             px = py = 0;
02025         }
02026         /* Pullback MV as specified in 8.3.5.3.4 */
02027         {
02028             int qx, qy, X, Y;
02029             if(v->profile < PROFILE_ADVANCED) {
02030                 qx = (s->mb_x << 5);
02031                 qy = (s->mb_y << 5);
02032                 X = (s->mb_width << 5) - 4;
02033                 Y = (s->mb_height << 5) - 4;
02034                 if(qx + px < -28) px = -28 - qx;
02035                 if(qy + py < -28) py = -28 - qy;
02036                 if(qx + px > X) px = X - qx;
02037                 if(qy + py > Y) py = Y - qy;
02038             } else {
02039                 qx = (s->mb_x << 6);
02040                 qy = (s->mb_y << 6);
02041                 X = (s->mb_width << 6) - 4;
02042                 Y = (s->mb_height << 6) - 4;
02043                 if(qx + px < -60) px = -60 - qx;
02044                 if(qy + py < -60) py = -60 - qy;
02045                 if(qx + px > X) px = X - qx;
02046                 if(qy + py > Y) py = Y - qy;
02047             }
02048         }
02049         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
02050         if(0 && !s->first_slice_line && s->mb_x) {
02051             if(is_intra[xy - wrap])
02052                 sum = FFABS(px) + FFABS(py);
02053             else
02054                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
02055             if(sum > 32) {
02056                 if(get_bits1(&s->gb)) {
02057                     px = A[0];
02058                     py = A[1];
02059                 } else {
02060                     px = C[0];
02061                     py = C[1];
02062                 }
02063             } else {
02064                 if(is_intra[xy - 2])
02065                     sum = FFABS(px) + FFABS(py);
02066                 else
02067                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);
02068                 if(sum > 32) {
02069                     if(get_bits1(&s->gb)) {
02070                         px = A[0];
02071                         py = A[1];
02072                     } else {
02073                         px = C[0];
02074                         py = C[1];
02075                     }
02076                 }
02077             }
02078         }
02079         /* store MV using signed modulus of MV range defined in 4.11 */
02080 
02081         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;
02082         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;
02083     }
02084     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
02085     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
02086     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
02087     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
02088 }
02089 
02097 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
02098                               int16_t **dc_val_ptr, int *dir_ptr)
02099 {
02100     int a, b, c, wrap, pred, scale;
02101     int16_t *dc_val;
02102     static const uint16_t dcpred[32] = {
02103     -1, 1024,  512,  341,  256,  205,  171,  146,  128,
02104          114,  102,   93,   85,   79,   73,   68,   64,
02105           60,   57,   54,   51,   49,   47,   45,   43,
02106           41,   39,   38,   37,   35,   34,   33
02107     };
02108 
02109     /* find prediction - wmv3_dc_scale always used here in fact */
02110     if (n < 4)     scale = s->y_dc_scale;
02111     else           scale = s->c_dc_scale;
02112 
02113     wrap = s->block_wrap[n];
02114     dc_val= s->dc_val[0] + s->block_index[n];
02115 
02116     /* B A
02117      * C X
02118      */
02119     c = dc_val[ - 1];
02120     b = dc_val[ - 1 - wrap];
02121     a = dc_val[ - wrap];
02122 
02123     if (pq < 9 || !overlap)
02124     {
02125         /* Set outer values */
02126         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];
02127         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];
02128     }
02129     else
02130     {
02131         /* Set outer values */
02132         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;
02133         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;
02134     }
02135 
02136     if (abs(a - b) <= abs(b - c)) {
02137         pred = c;
02138         *dir_ptr = 1;//left
02139     } else {
02140         pred = a;
02141         *dir_ptr = 0;//top
02142     }
02143 
02144     /* update predictor */
02145     *dc_val_ptr = &dc_val[0];
02146     return pred;
02147 }
02148 
02149 
02157 static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
02158                               int a_avail, int c_avail,
02159                               int16_t **dc_val_ptr, int *dir_ptr)
02160 {
02161     int a, b, c, wrap, pred, scale;
02162     int16_t *dc_val;
02163     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
02164     int q1, q2 = 0;
02165 
02166     /* find prediction - wmv3_dc_scale always used here in fact */
02167     if (n < 4)     scale = s->y_dc_scale;
02168     else           scale = s->c_dc_scale;
02169 
02170     wrap = s->block_wrap[n];
02171     dc_val= s->dc_val[0] + s->block_index[n];
02172 
02173     /* B A
02174      * C X
02175      */
02176     c = dc_val[ - 1];
02177     b = dc_val[ - 1 - wrap];
02178     a = dc_val[ - wrap];
02179     /* scale predictors if needed */
02180     q1 = s->current_picture.qscale_table[mb_pos];
02181     if(c_avail && (n!= 1 && n!=3)) {
02182         q2 = s->current_picture.qscale_table[mb_pos - 1];
02183         if(q2 && q2 != q1)
02184             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
02185     }
02186     if(a_avail && (n!= 2 && n!=3)) {
02187         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
02188         if(q2 && q2 != q1)
02189             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
02190     }
02191     if(a_avail && c_avail && (n!=3)) {
02192         int off = mb_pos;
02193         if(n != 1) off--;
02194         if(n != 2) off -= s->mb_stride;
02195         q2 = s->current_picture.qscale_table[off];
02196         if(q2 && q2 != q1)
02197             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
02198     }
02199 
02200     if(a_avail && c_avail) {
02201         if(abs(a - b) <= abs(b - c)) {
02202             pred = c;
02203             *dir_ptr = 1;//left
02204         } else {
02205             pred = a;
02206             *dir_ptr = 0;//top
02207         }
02208     } else if(a_avail) {
02209         pred = a;
02210         *dir_ptr = 0;//top
02211     } else if(c_avail) {
02212         pred = c;
02213         *dir_ptr = 1;//left
02214     } else {
02215         pred = 0;
02216         *dir_ptr = 1;//left
02217     }
02218 
02219     /* update predictor */
02220     *dc_val_ptr = &dc_val[0];
02221     return pred;
02222 }
02223 
02224 
02231 static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
02232 {
02233     int xy, wrap, pred, a, b, c;
02234 
02235     xy = s->block_index[n];
02236     wrap = s->b8_stride;
02237 
02238     /* B C
02239      * A X
02240      */
02241     a = s->coded_block[xy - 1       ];
02242     b = s->coded_block[xy - 1 - wrap];
02243     c = s->coded_block[xy     - wrap];
02244 
02245     if (b == c) {
02246         pred = a;
02247     } else {
02248         pred = c;
02249     }
02250 
02251     /* store value */
02252     *coded_block_ptr = &s->coded_block[xy];
02253 
02254     return pred;
02255 }
02256 
02265 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)
02266 {
02267     GetBitContext *gb = &v->s.gb;
02268     int index, escape, run = 0, level = 0, lst = 0;
02269 
02270     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
02271     if (index != vc1_ac_sizes[codingset] - 1) {
02272         run = vc1_index_decode_table[codingset][index][0];
02273         level = vc1_index_decode_table[codingset][index][1];
02274         lst = index >= vc1_last_decode_table[codingset];
02275         if(get_bits1(gb))
02276             level = -level;
02277     } else {
02278         escape = decode210(gb);
02279         if (escape != 2) {
02280             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
02281             run = vc1_index_decode_table[codingset][index][0];
02282             level = vc1_index_decode_table[codingset][index][1];
02283             lst = index >= vc1_last_decode_table[codingset];
02284             if(escape == 0) {
02285                 if(lst)
02286                     level += vc1_last_delta_level_table[codingset][run];
02287                 else
02288                     level += vc1_delta_level_table[codingset][run];
02289             } else {
02290                 if(lst)
02291                     run += vc1_last_delta_run_table[codingset][level] + 1;
02292                 else
02293                     run += vc1_delta_run_table[codingset][level] + 1;
02294             }
02295             if(get_bits1(gb))
02296                 level = -level;
02297         } else {
02298             int sign;
02299             lst = get_bits1(gb);
02300             if(v->s.esc3_level_length == 0) {
02301                 if(v->pq < 8 || v->dquantfrm) { // table 59
02302                     v->s.esc3_level_length = get_bits(gb, 3);
02303                     if(!v->s.esc3_level_length)
02304                         v->s.esc3_level_length = get_bits(gb, 2) + 8;
02305                 } else { //table 60
02306                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
02307                 }
02308                 v->s.esc3_run_length = 3 + get_bits(gb, 2);
02309             }
02310             run = get_bits(gb, v->s.esc3_run_length);
02311             sign = get_bits1(gb);
02312             level = get_bits(gb, v->s.esc3_level_length);
02313             if(sign)
02314                 level = -level;
02315         }
02316     }
02317 
02318     *last = lst;
02319     *skip = run;
02320     *value = level;
02321 }
02322 
02329 static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
02330 {
02331     GetBitContext *gb = &v->s.gb;
02332     MpegEncContext *s = &v->s;
02333     int dc_pred_dir = 0; /* Direction of the DC prediction used */
02334     int run_diff, i;
02335     int16_t *dc_val;
02336     int16_t *ac_val, *ac_val2;
02337     int dcdiff;
02338 
02339     /* Get DC differential */
02340     if (n < 4) {
02341         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02342     } else {
02343         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02344     }
02345     if (dcdiff < 0){
02346         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
02347         return -1;
02348     }
02349     if (dcdiff)
02350     {
02351         if (dcdiff == 119 /* ESC index value */)
02352         {
02353             /* TODO: Optimize */
02354             if (v->pq == 1) dcdiff = get_bits(gb, 10);
02355             else if (v->pq == 2) dcdiff = get_bits(gb, 9);
02356             else dcdiff = get_bits(gb, 8);
02357         }
02358         else
02359         {
02360             if (v->pq == 1)
02361                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
02362             else if (v->pq == 2)
02363                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;
02364         }
02365         if (get_bits1(gb))
02366             dcdiff = -dcdiff;
02367     }
02368 
02369     /* Prediction */
02370     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
02371     *dc_val = dcdiff;
02372 
02373     /* Store the quantized DC coeff, used for prediction */
02374     if (n < 4) {
02375         block[0] = dcdiff * s->y_dc_scale;
02376     } else {
02377         block[0] = dcdiff * s->c_dc_scale;
02378     }
02379     /* Skip ? */
02380     run_diff = 0;
02381     i = 0;
02382     if (!coded) {
02383         goto not_coded;
02384     }
02385 
02386     //AC Decoding
02387     i = 1;
02388 
02389     {
02390         int last = 0, skip, value;
02391         const int8_t *zz_table;
02392         int scale;
02393         int k;
02394 
02395         scale = v->pq * 2 + v->halfpq;
02396 
02397         if(v->s.ac_pred) {
02398             if(!dc_pred_dir)
02399                 zz_table = ff_vc1_horizontal_zz;
02400             else
02401                 zz_table = ff_vc1_vertical_zz;
02402         } else
02403             zz_table = ff_vc1_normal_zz;
02404 
02405         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
02406         ac_val2 = ac_val;
02407         if(dc_pred_dir) //left
02408             ac_val -= 16;
02409         else //top
02410             ac_val -= 16 * s->block_wrap[n];
02411 
02412         while (!last) {
02413             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
02414             i += skip;
02415             if(i > 63)
02416                 break;
02417             block[zz_table[i++]] = value;
02418         }
02419 
02420         /* apply AC prediction if needed */
02421         if(s->ac_pred) {
02422             if(dc_pred_dir) { //left
02423                 for(k = 1; k < 8; k++)
02424                     block[k << 3] += ac_val[k];
02425             } else { //top
02426                 for(k = 1; k < 8; k++)
02427                     block[k] += ac_val[k + 8];
02428             }
02429         }
02430         /* save AC coeffs for further prediction */
02431         for(k = 1; k < 8; k++) {
02432             ac_val2[k] = block[k << 3];
02433             ac_val2[k + 8] = block[k];
02434         }
02435 
02436         /* scale AC coeffs */
02437         for(k = 1; k < 64; k++)
02438             if(block[k]) {
02439                 block[k] *= scale;
02440                 if(!v->pquantizer)
02441                     block[k] += (block[k] < 0) ? -v->pq : v->pq;
02442             }
02443 
02444         if(s->ac_pred) i = 63;
02445     }
02446 
02447 not_coded:
02448     if(!coded) {
02449         int k, scale;
02450         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
02451         ac_val2 = ac_val;
02452 
02453         scale = v->pq * 2 + v->halfpq;
02454         memset(ac_val2, 0, 16 * 2);
02455         if(dc_pred_dir) {//left
02456             ac_val -= 16;
02457             if(s->ac_pred)
02458                 memcpy(ac_val2, ac_val, 8 * 2);
02459         } else {//top
02460             ac_val -= 16 * s->block_wrap[n];
02461             if(s->ac_pred)
02462                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
02463         }
02464 
02465         /* apply AC prediction if needed */
02466         if(s->ac_pred) {
02467             if(dc_pred_dir) { //left
02468                 for(k = 1; k < 8; k++) {
02469                     block[k << 3] = ac_val[k] * scale;
02470                     if(!v->pquantizer && block[k << 3])
02471                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;
02472                 }
02473             } else { //top
02474                 for(k = 1; k < 8; k++) {
02475                     block[k] = ac_val[k + 8] * scale;
02476                     if(!v->pquantizer && block[k])
02477                         block[k] += (block[k] < 0) ? -v->pq : v->pq;
02478                 }
02479             }
02480             i = 63;
02481         }
02482     }
02483     s->block_last_index[n] = i;
02484 
02485     return 0;
02486 }
02487 
02494 static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)
02495 {
02496     GetBitContext *gb = &v->s.gb;
02497     MpegEncContext *s = &v->s;
02498     int dc_pred_dir = 0; /* Direction of the DC prediction used */
02499     int run_diff, i;
02500     int16_t *dc_val;
02501     int16_t *ac_val, *ac_val2;
02502     int dcdiff;
02503     int a_avail = v->a_avail, c_avail = v->c_avail;
02504     int use_pred = s->ac_pred;
02505     int scale;
02506     int q1, q2 = 0;
02507     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
02508 
02509     /* Get DC differential */
02510     if (n < 4) {
02511         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02512     } else {
02513         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02514     }
02515     if (dcdiff < 0){
02516         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
02517         return -1;
02518     }
02519     if (dcdiff)
02520     {
02521         if (dcdiff == 119 /* ESC index value */)
02522         {
02523             /* TODO: Optimize */
02524             if (mquant == 1) dcdiff = get_bits(gb, 10);
02525             else if (mquant == 2) dcdiff = get_bits(gb, 9);
02526             else dcdiff = get_bits(gb, 8);
02527         }
02528         else
02529         {
02530             if (mquant == 1)
02531                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
02532             else if (mquant == 2)
02533                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;
02534         }
02535         if (get_bits1(gb))
02536             dcdiff = -dcdiff;
02537     }
02538 
02539     /* Prediction */
02540     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
02541     *dc_val = dcdiff;
02542 
02543     /* Store the quantized DC coeff, used for prediction */
02544     if (n < 4) {
02545         block[0] = dcdiff * s->y_dc_scale;
02546     } else {
02547         block[0] = dcdiff * s->c_dc_scale;
02548     }
02549     /* Skip ? */
02550     run_diff = 0;
02551     i = 0;
02552 
02553     //AC Decoding
02554     i = 1;
02555 
02556     /* check if AC is needed at all */
02557     if(!a_avail && !c_avail) use_pred = 0;
02558     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
02559     ac_val2 = ac_val;
02560 
02561     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
02562 
02563     if(dc_pred_dir) //left
02564         ac_val -= 16;
02565     else //top
02566         ac_val -= 16 * s->block_wrap[n];
02567 
02568     q1 = s->current_picture.qscale_table[mb_pos];
02569     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
02570     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
02571     if(dc_pred_dir && n==1) q2 = q1;
02572     if(!dc_pred_dir && n==2) q2 = q1;
02573     if(n==3) q2 = q1;
02574 
02575     if(coded) {
02576         int last = 0, skip, value;
02577         const int8_t *zz_table;
02578         int k;
02579 
02580         if(v->s.ac_pred) {
02581             if(!dc_pred_dir)
02582                 zz_table = ff_vc1_horizontal_zz;
02583             else
02584                 zz_table = ff_vc1_vertical_zz;
02585         } else
02586             zz_table = ff_vc1_normal_zz;
02587 
02588         while (!last) {
02589             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
02590             i += skip;
02591             if(i > 63)
02592                 break;
02593             block[zz_table[i++]] = value;
02594         }
02595 
02596         /* apply AC prediction if needed */
02597         if(use_pred) {
02598             /* scale predictors if needed*/
02599             if(q2 && q1!=q2) {
02600                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02601                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02602 
02603                 if(dc_pred_dir) { //left
02604                     for(k = 1; k < 8; k++)
02605                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02606                 } else { //top
02607                     for(k = 1; k < 8; k++)
02608                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02609                 }
02610             } else {
02611                 if(dc_pred_dir) { //left
02612                     for(k = 1; k < 8; k++)
02613                         block[k << 3] += ac_val[k];
02614                 } else { //top
02615                     for(k = 1; k < 8; k++)
02616                         block[k] += ac_val[k + 8];
02617                 }
02618             }
02619         }
02620         /* save AC coeffs for further prediction */
02621         for(k = 1; k < 8; k++) {
02622             ac_val2[k] = block[k << 3];
02623             ac_val2[k + 8] = block[k];
02624         }
02625 
02626         /* scale AC coeffs */
02627         for(k = 1; k < 64; k++)
02628             if(block[k]) {
02629                 block[k] *= scale;
02630                 if(!v->pquantizer)
02631                     block[k] += (block[k] < 0) ? -mquant : mquant;
02632             }
02633 
02634         if(use_pred) i = 63;
02635     } else { // no AC coeffs
02636         int k;
02637 
02638         memset(ac_val2, 0, 16 * 2);
02639         if(dc_pred_dir) {//left
02640             if(use_pred) {
02641                 memcpy(ac_val2, ac_val, 8 * 2);
02642                 if(q2 && q1!=q2) {
02643                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02644                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02645                     for(k = 1; k < 8; k++)
02646                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02647                 }
02648             }
02649         } else {//top
02650             if(use_pred) {
02651                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
02652                 if(q2 && q1!=q2) {
02653                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02654                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02655                     for(k = 1; k < 8; k++)
02656                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02657                 }
02658             }
02659         }
02660 
02661         /* apply AC prediction if needed */
02662         if(use_pred) {
02663             if(dc_pred_dir) { //left
02664                 for(k = 1; k < 8; k++) {
02665                     block[k << 3] = ac_val2[k] * scale;
02666                     if(!v->pquantizer && block[k << 3])
02667                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
02668                 }
02669             } else { //top
02670                 for(k = 1; k < 8; k++) {
02671                     block[k] = ac_val2[k + 8] * scale;
02672                     if(!v->pquantizer && block[k])
02673                         block[k] += (block[k] < 0) ? -mquant : mquant;
02674                 }
02675             }
02676             i = 63;
02677         }
02678     }
02679     s->block_last_index[n] = i;
02680 
02681     return 0;
02682 }
02683 
02691 static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
02692 {
02693     GetBitContext *gb = &v->s.gb;
02694     MpegEncContext *s = &v->s;
02695     int dc_pred_dir = 0; /* Direction of the DC prediction used */
02696     int run_diff, i;
02697     int16_t *dc_val;
02698     int16_t *ac_val, *ac_val2;
02699     int dcdiff;
02700     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
02701     int a_avail = v->a_avail, c_avail = v->c_avail;
02702     int use_pred = s->ac_pred;
02703     int scale;
02704     int q1, q2 = 0;
02705 
02706     /* XXX: Guard against dumb values of mquant */
02707     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
02708 
02709     /* Set DC scale - y and c use the same */
02710     s->y_dc_scale = s->y_dc_scale_table[mquant];
02711     s->c_dc_scale = s->c_dc_scale_table[mquant];
02712 
02713     /* Get DC differential */
02714     if (n < 4) {
02715         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02716     } else {
02717         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
02718     }
02719     if (dcdiff < 0){
02720         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
02721         return -1;
02722     }
02723     if (dcdiff)
02724     {
02725         if (dcdiff == 119 /* ESC index value */)
02726         {
02727             /* TODO: Optimize */
02728             if (mquant == 1) dcdiff = get_bits(gb, 10);
02729             else if (mquant == 2) dcdiff = get_bits(gb, 9);
02730             else dcdiff = get_bits(gb, 8);
02731         }
02732         else
02733         {
02734             if (mquant == 1)
02735                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
02736             else if (mquant == 2)
02737                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;
02738         }
02739         if (get_bits1(gb))
02740             dcdiff = -dcdiff;
02741     }
02742 
02743     /* Prediction */
02744     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
02745     *dc_val = dcdiff;
02746 
02747     /* Store the quantized DC coeff, used for prediction */
02748 
02749     if (n < 4) {
02750         block[0] = dcdiff * s->y_dc_scale;
02751     } else {
02752         block[0] = dcdiff * s->c_dc_scale;
02753     }
02754     /* Skip ? */
02755     run_diff = 0;
02756     i = 0;
02757 
02758     //AC Decoding
02759     i = 1;
02760 
02761     /* check if AC is needed at all and adjust direction if needed */
02762     if(!a_avail) dc_pred_dir = 1;
02763     if(!c_avail) dc_pred_dir = 0;
02764     if(!a_avail && !c_avail) use_pred = 0;
02765     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
02766     ac_val2 = ac_val;
02767 
02768     scale = mquant * 2 + v->halfpq;
02769 
02770     if(dc_pred_dir) //left
02771         ac_val -= 16;
02772     else //top
02773         ac_val -= 16 * s->block_wrap[n];
02774 
02775     q1 = s->current_picture.qscale_table[mb_pos];
02776     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
02777     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
02778     if(dc_pred_dir && n==1) q2 = q1;
02779     if(!dc_pred_dir && n==2) q2 = q1;
02780     if(n==3) q2 = q1;
02781 
02782     if(coded) {
02783         int last = 0, skip, value;
02784         const int8_t *zz_table;
02785         int k;
02786 
02787         zz_table = ff_vc1_simple_progressive_8x8_zz;
02788 
02789         while (!last) {
02790             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
02791             i += skip;
02792             if(i > 63)
02793                 break;
02794             block[zz_table[i++]] = value;
02795         }
02796 
02797         /* apply AC prediction if needed */
02798         if(use_pred) {
02799             /* scale predictors if needed*/
02800             if(q2 && q1!=q2) {
02801                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02802                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02803 
02804                 if(dc_pred_dir) { //left
02805                     for(k = 1; k < 8; k++)
02806                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02807                 } else { //top
02808                     for(k = 1; k < 8; k++)
02809                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02810                 }
02811             } else {
02812                 if(dc_pred_dir) { //left
02813                     for(k = 1; k < 8; k++)
02814                         block[k << 3] += ac_val[k];
02815                 } else { //top
02816                     for(k = 1; k < 8; k++)
02817                         block[k] += ac_val[k + 8];
02818                 }
02819             }
02820         }
02821         /* save AC coeffs for further prediction */
02822         for(k = 1; k < 8; k++) {
02823             ac_val2[k] = block[k << 3];
02824             ac_val2[k + 8] = block[k];
02825         }
02826 
02827         /* scale AC coeffs */
02828         for(k = 1; k < 64; k++)
02829             if(block[k]) {
02830                 block[k] *= scale;
02831                 if(!v->pquantizer)
02832                     block[k] += (block[k] < 0) ? -mquant : mquant;
02833             }
02834 
02835         if(use_pred) i = 63;
02836     } else { // no AC coeffs
02837         int k;
02838 
02839         memset(ac_val2, 0, 16 * 2);
02840         if(dc_pred_dir) {//left
02841             if(use_pred) {
02842                 memcpy(ac_val2, ac_val, 8 * 2);
02843                 if(q2 && q1!=q2) {
02844                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02845                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02846                     for(k = 1; k < 8; k++)
02847                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02848                 }
02849             }
02850         } else {//top
02851             if(use_pred) {
02852                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
02853                 if(q2 && q1!=q2) {
02854                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
02855                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
02856                     for(k = 1; k < 8; k++)
02857                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
02858                 }
02859             }
02860         }
02861 
02862         /* apply AC prediction if needed */
02863         if(use_pred) {
02864             if(dc_pred_dir) { //left
02865                 for(k = 1; k < 8; k++) {
02866                     block[k << 3] = ac_val2[k] * scale;
02867                     if(!v->pquantizer && block[k << 3])
02868                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
02869                 }
02870             } else { //top
02871                 for(k = 1; k < 8; k++) {
02872                     block[k] = ac_val2[k + 8] * scale;
02873                     if(!v->pquantizer && block[k])
02874                         block[k] += (block[k] < 0) ? -mquant : mquant;
02875                 }
02876             }
02877             i = 63;
02878         }
02879     }
02880     s->block_last_index[n] = i;
02881 
02882     return 0;
02883 }
02884 
02887 static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)
02888 {
02889     MpegEncContext *s = &v->s;
02890     GetBitContext *gb = &s->gb;
02891     int i, j;
02892     int subblkpat = 0;
02893     int scale, off, idx, last, skip, value;
02894     int ttblk = ttmb & 7;
02895 
02896     if(ttmb == -1) {
02897         ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
02898     }
02899     if(ttblk == TT_4X4) {
02900         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
02901     }
02902     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
02903         subblkpat = decode012(gb);
02904         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
02905         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
02906         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
02907     }
02908     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
02909 
02910     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
02911     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
02912         subblkpat = 2 - (ttblk == TT_8X4_TOP);
02913         ttblk = TT_8X4;
02914     }
02915     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
02916         subblkpat = 2 - (ttblk == TT_4X8_LEFT);
02917         ttblk = TT_4X8;
02918     }
02919     switch(ttblk) {
02920     case TT_8X8:
02921         i = 0;
02922         last = 0;
02923         while (!last) {
02924             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
02925             i += skip;
02926             if(i > 63)
02927                 break;
02928             idx = ff_vc1_simple_progressive_8x8_zz[i++];
02929             block[idx] = value * scale;
02930             if(!v->pquantizer)
02931                 block[idx] += (block[idx] < 0) ? -mquant : mquant;
02932         }
02933         s->dsp.vc1_inv_trans_8x8(block);
02934         break;
02935     case TT_4X4:
02936         for(j = 0; j < 4; j++) {
02937             last = subblkpat & (1 << (3 - j));
02938             i = 0;
02939             off = (j & 1) * 4 + (j & 2) * 16;
02940             while (!last) {
02941                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
02942                 i += skip;
02943                 if(i > 15)
02944                     break;
02945                 idx = ff_vc1_simple_progressive_4x4_zz[i++];
02946                 block[idx + off] = value * scale;
02947                 if(!v->pquantizer)
02948                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
02949             }
02950             if(!(subblkpat & (1 << (3 - j))))
02951                 s->dsp.vc1_inv_trans_4x4(block, j);
02952         }
02953         break;
02954     case TT_8X4:
02955         for(j = 0; j < 2; j++) {
02956             last = subblkpat & (1 << (1 - j));
02957             i = 0;
02958             off = j * 32;
02959             while (!last) {
02960                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
02961                 i += skip;
02962                 if(i > 31)
02963                     break;
02964                 if(v->profile < PROFILE_ADVANCED)
02965                     idx = ff_vc1_simple_progressive_8x4_zz[i++];
02966                 else
02967                     idx = ff_vc1_adv_progressive_8x4_zz[i++];
02968                 block[idx + off] = value * scale;
02969                 if(!v->pquantizer)
02970                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
02971             }
02972             if(!(subblkpat & (1 << (1 - j))))
02973                 s->dsp.vc1_inv_trans_8x4(block, j);
02974         }
02975         break;
02976     case TT_4X8:
02977         for(j = 0; j < 2; j++) {
02978             last = subblkpat & (1 << (1 - j));
02979             i = 0;
02980             off = j * 4;
02981             while (!last) {
02982                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
02983                 i += skip;
02984                 if(i > 31)
02985                     break;
02986                 if(v->profile < PROFILE_ADVANCED)
02987                     idx = ff_vc1_simple_progressive_4x8_zz[i++];
02988                 else
02989                     idx = ff_vc1_adv_progressive_4x8_zz[i++];
02990                 block[idx + off] = value * scale;
02991                 if(!v->pquantizer)
02992                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
02993             }
02994             if(!(subblkpat & (1 << (1 - j))))
02995                 s->dsp.vc1_inv_trans_4x8(block, j);
02996         }
02997         break;
02998     }
02999     return 0;
03000 }
03001 
03002 
03005 static int vc1_decode_p_mb(VC1Context *v)
03006 {
03007     MpegEncContext *s = &v->s;
03008     GetBitContext *gb = &s->gb;
03009     int i, j;
03010     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
03011     int cbp; /* cbp decoding stuff */
03012     int mqdiff, mquant; /* MB quantization */
03013     int ttmb = v->ttfrm; /* MB Transform type */
03014     int status;
03015 
03016     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
03017       offset_table[6] = { 0, 1, 3, 7, 15, 31 };
03018     int mb_has_coeffs = 1; /* last_flag */
03019     int dmv_x, dmv_y; /* Differential MV components */
03020     int index, index1; /* LUT indices */
03021     int val, sign; /* temp values */
03022     int first_block = 1;
03023     int dst_idx, off;
03024     int skipped, fourmv;
03025 
03026     mquant = v->pq; /* Loosy initialization */
03027 
03028     if (v->mv_type_is_raw)
03029         fourmv = get_bits1(gb);
03030     else
03031         fourmv = v->mv_type_mb_plane[mb_pos];
03032     if (v->skip_is_raw)
03033         skipped = get_bits1(gb);
03034     else
03035         skipped = v->s.mbskip_table[mb_pos];
03036 
03037     s->dsp.clear_blocks(s->block[0]);
03038 
03039     if (!fourmv) /* 1MV mode */
03040     {
03041         if (!skipped)
03042         {
03043             GET_MVDATA(dmv_x, dmv_y);
03044 
03045             if (s->mb_intra) {
03046                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
03047                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
03048             }
03049             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
03050             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);
03051 
03052             /* FIXME Set DC val for inter block ? */
03053             if (s->mb_intra && !mb_has_coeffs)
03054             {
03055                 GET_MQUANT();
03056                 s->ac_pred = get_bits1(gb);
03057                 cbp = 0;
03058             }
03059             else if (mb_has_coeffs)
03060             {
03061                 if (s->mb_intra) s->ac_pred = get_bits1(gb);
03062                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
03063                 GET_MQUANT();
03064             }
03065             else
03066             {
03067                 mquant = v->pq;
03068                 cbp = 0;
03069             }
03070             s->current_picture.qscale_table[mb_pos] = mquant;
03071 
03072             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
03073                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
03074                                 VC1_TTMB_VLC_BITS, 2);
03075             if(!s->mb_intra) vc1_mc_1mv(v, 0);
03076             dst_idx = 0;
03077             for (i=0; i<6; i++)
03078             {
03079                 s->dc_val[0][s->block_index[i]] = 0;
03080                 dst_idx += i >> 2;
03081                 val = ((cbp >> (5 - i)) & 1);
03082                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
03083                 v->mb_type[0][s->block_index[i]] = s->mb_intra;
03084                 if(s->mb_intra) {
03085                     /* check if prediction blocks A and C are available */
03086                     v->a_avail = v->c_avail = 0;
03087                     if(i == 2 || i == 3 || !s->first_slice_line)
03088                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
03089                     if(i == 1 || i == 3 || s->mb_x)
03090                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];
03091 
03092                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
03093                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
03094                     s->dsp.vc1_inv_trans_8x8(s->block[i]);
03095                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
03096                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
03097                     if(v->pq >= 9 && v->overlap) {
03098                         if(v->c_avail)
03099                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
03100                         if(v->a_avail)
03101                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
03102                     }
03103                 } else if(val) {
03104                     vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
03105                     if(!v->ttmbf && ttmb < 8) ttmb = -1;
03106                     first_block = 0;
03107                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
03108                         s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
03109                 }
03110             }
03111         }
03112         else //Skipped
03113         {
03114             s->mb_intra = 0;
03115             for(i = 0; i < 6; i++) {
03116                 v->mb_type[0][s->block_index[i]] = 0;
03117                 s->dc_val[0][s->block_index[i]] = 0;
03118             }
03119             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
03120             s->current_picture.qscale_table[mb_pos] = 0;
03121             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);
03122             vc1_mc_1mv(v, 0);
03123             return 0;
03124         }
03125     } //1MV mode
03126     else //4MV mode
03127     {
03128         if (!skipped /* unskipped MB */)
03129         {
03130             int intra_count = 0, coded_inter = 0;
03131             int is_intra[6], is_coded[6];
03132             /* Get CBPCY */
03133             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
03134             for (i=0; i<6; i++)
03135             {
03136                 val = ((cbp >> (5 - i)) & 1);
03137                 s->dc_val[0][s->block_index[i]] = 0;
03138                 s->mb_intra = 0;
03139                 if(i < 4) {
03140                     dmv_x = dmv_y = 0;
03141                     s->mb_intra = 0;
03142                     mb_has_coeffs = 0;
03143                     if(val) {
03144                         GET_MVDATA(dmv_x, dmv_y);
03145                     }
03146                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);
03147                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);
03148                     intra_count += s->mb_intra;
03149                     is_intra[i] = s->mb_intra;
03150                     is_coded[i] = mb_has_coeffs;
03151                 }
03152                 if(i&4){
03153                     is_intra[i] = (intra_count >= 3);
03154                     is_coded[i] = val;
03155                 }
03156                 if(i == 4) vc1_mc_4mv_chroma(v);
03157                 v->mb_type[0][s->block_index[i]] = is_intra[i];
03158                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];
03159             }
03160             // if there are no coded blocks then don't do anything more
03161             if(!intra_count && !coded_inter) return 0;
03162             dst_idx = 0;
03163             GET_MQUANT();
03164             s->current_picture.qscale_table[mb_pos] = mquant;
03165             /* test if block is intra and has pred */
03166             {
03167                 int intrapred = 0;
03168                 for(i=0; i<6; i++)
03169                     if(is_intra[i]) {
03170                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
03171                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {
03172                             intrapred = 1;
03173                             break;
03174                         }
03175                     }
03176                 if(intrapred)s->ac_pred = get_bits1(gb);
03177                 else s->ac_pred = 0;
03178             }
03179             if (!v->ttmbf && coded_inter)
03180                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
03181             for (i=0; i<6; i++)
03182             {
03183                 dst_idx += i >> 2;
03184                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
03185                 s->mb_intra = is_intra[i];
03186                 if (is_intra[i]) {
03187                     /* check if prediction blocks A and C are available */
03188                     v->a_avail = v->c_avail = 0;
03189                     if(i == 2 || i == 3 || !s->first_slice_line)
03190                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
03191                     if(i == 1 || i == 3 || s->mb_x)
03192                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];
03193 
03194                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
03195                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
03196                     s->dsp.vc1_inv_trans_8x8(s->block[i]);
03197                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
03198                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
03199                     if(v->pq >= 9 && v->overlap) {
03200                         if(v->c_avail)
03201                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
03202                         if(v->a_avail)
03203                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
03204                     }
03205                 } else if(is_coded[i]) {
03206                     status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
03207                     if(!v->ttmbf && ttmb < 8) ttmb = -1;
03208                     first_block = 0;
03209                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
03210                         s->