FFmpeg: libavcodec/rv40.c Source File

00001 /*
00002  * RV40 decoder
00003  * Copyright (c) 2007 Konstantin Shishkov
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00027 #include "libavutil/imgutils.h"
00028 
00029 #include "avcodec.h"
00030 #include "dsputil.h"
00031 #include "mpegvideo.h"
00032 #include "golomb.h"
00033 
00034 #include "rv34.h"
00035 #include "rv40vlc2.h"
00036 #include "rv40data.h"
00037 
00038 static VLC aic_top_vlc;
00039 static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM];
00040 static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS];
00041 
00042 static const int16_t mode2_offs[] = {
00043        0,  614, 1222, 1794, 2410,  3014,  3586,  4202,  4792, 5382, 5966, 6542,
00044     7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814
00045 };
00046 
00050 static av_cold void rv40_init_tables(void)
00051 {
00052     int i;
00053     static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2];
00054     static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2];
00055     static VLC_TYPE aic_mode2_table[11814][2];
00056     static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2];
00057     static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2];
00058 
00059     aic_top_vlc.table = aic_table;
00060     aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS;
00061     init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE,
00062              rv40_aic_top_vlc_bits,  1, 1,
00063              rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
00064     for(i = 0; i < AIC_MODE1_NUM; i++){
00065         // Every tenth VLC table is empty
00066         if((i % 10) == 9) continue;
00067         aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS];
00068         aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS;
00069         init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE,
00070                  aic_mode1_vlc_bits[i],  1, 1,
00071                  aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
00072     }
00073     for(i = 0; i < AIC_MODE2_NUM; i++){
00074         aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]];
00075         aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i];
00076         init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE,
00077                  aic_mode2_vlc_bits[i],  1, 1,
00078                  aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
00079     }
00080     for(i = 0; i < NUM_PTYPE_VLCS; i++){
00081         ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS];
00082         ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS;
00083         ff_init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE,
00084                             ptype_vlc_bits[i],  1, 1,
00085                             ptype_vlc_codes[i], 1, 1,
00086                             ptype_vlc_syms,     1, 1, INIT_VLC_USE_NEW_STATIC);
00087     }
00088     for(i = 0; i < NUM_BTYPE_VLCS; i++){
00089         btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS];
00090         btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS;
00091         ff_init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE,
00092                             btype_vlc_bits[i],  1, 1,
00093                             btype_vlc_codes[i], 1, 1,
00094                             btype_vlc_syms,     1, 1, INIT_VLC_USE_NEW_STATIC);
00095     }
00096 }
00097 
00104 static int get_dimension(GetBitContext *gb, const int *dim)
00105 {
00106     int t   = get_bits(gb, 3);
00107     int val = dim[t];
00108     if(val < 0)
00109         val = dim[get_bits1(gb) - val];
00110     if(!val){
00111         do{
00112             t = get_bits(gb, 8);
00113             val += t << 2;
00114         }while(t == 0xFF);
00115     }
00116     return val;
00117 }
00118 
00122 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
00123 {
00124     *w = get_dimension(gb, rv40_standard_widths);
00125     *h = get_dimension(gb, rv40_standard_heights);
00126 }
00127 
00128 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
00129 {
00130     int mb_bits;
00131     int w = r->s.width, h = r->s.height;
00132     int mb_size;
00133 
00134     memset(si, 0, sizeof(SliceInfo));
00135     if(get_bits1(gb))
00136         return -1;
00137     si->type = get_bits(gb, 2);
00138     if(si->type == 1) si->type = 0;
00139     si->quant = get_bits(gb, 5);
00140     if(get_bits(gb, 2))
00141         return -1;
00142     si->vlc_set = get_bits(gb, 2);
00143     skip_bits1(gb);
00144     si->pts = get_bits(gb, 13);
00145     if(!si->type || !get_bits1(gb))
00146         rv40_parse_picture_size(gb, &w, &h);
00147     if(av_image_check_size(w, h, 0, r->s.avctx) < 0)
00148         return -1;
00149     si->width  = w;
00150     si->height = h;
00151     mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
00152     mb_bits = ff_rv34_get_start_offset(gb, mb_size);
00153     si->start = get_bits(gb, mb_bits);
00154 
00155     return 0;
00156 }
00157 
00161 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
00162 {
00163     MpegEncContext *s = &r->s;
00164     int i, j, k, v;
00165     int A, B, C;
00166     int pattern;
00167     int8_t *ptr;
00168 
00169     for(i = 0; i < 4; i++, dst += r->intra_types_stride){
00170         if(!i && s->first_slice_line){
00171             pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1);
00172             dst[0] = (pattern >> 2) & 2;
00173             dst[1] = (pattern >> 1) & 2;
00174             dst[2] =  pattern       & 2;
00175             dst[3] = (pattern << 1) & 2;
00176             continue;
00177         }
00178         ptr = dst;
00179         for(j = 0; j < 4; j++){
00180             /* Coefficients are read using VLC chosen by the prediction pattern
00181              * The first one (used for retrieving a pair of coefficients) is
00182              * constructed from the top, top right and left coefficients
00183              * The second one (used for retrieving only one coefficient) is
00184              * top + 10 * left.
00185              */
00186             A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row
00187             B = ptr[-r->intra_types_stride];
00188             C = ptr[-1];
00189             pattern = A + (B << 4) + (C << 8);
00190             for(k = 0; k < MODE2_PATTERNS_NUM; k++)
00191                 if(pattern == rv40_aic_table_index[k])
00192                     break;
00193             if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
00194                 v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2);
00195                 *ptr++ = v/9;
00196                 *ptr++ = v%9;
00197                 j++;
00198             }else{
00199                 if(B != -1 && C != -1)
00200                     v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1);
00201                 else{ // tricky decoding
00202                     v = 0;
00203                     switch(C){
00204                     case -1: // code 0 -> 1, 1 -> 0
00205                         if(B < 2)
00206                             v = get_bits1(gb) ^ 1;
00207                         break;
00208                     case  0:
00209                     case  2: // code 0 -> 2, 1 -> 0
00210                         v = (get_bits1(gb) ^ 1) << 1;
00211                         break;
00212                     }
00213                 }
00214                 *ptr++ = v;
00215             }
00216         }
00217     }
00218     return 0;
00219 }
00220 
00224 static int rv40_decode_mb_info(RV34DecContext *r)
00225 {
00226     MpegEncContext *s = &r->s;
00227     GetBitContext *gb = &s->gb;
00228     int q, i;
00229     int prev_type = 0;
00230     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
00231     int blocks[RV34_MB_TYPES] = {0};
00232     int count = 0;
00233 
00234     if(!r->s.mb_skip_run) {
00235         r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1;
00236         if(r->s.mb_skip_run > (unsigned)s->mb_num)
00237             return -1;
00238     }
00239 
00240     if(--r->s.mb_skip_run)
00241          return RV34_MB_SKIP;
00242 
00243     if(r->avail_cache[6-1])
00244         blocks[r->mb_type[mb_pos - 1]]++;
00245     if(r->avail_cache[6-4]){
00246         blocks[r->mb_type[mb_pos - s->mb_stride]]++;
00247         if(r->avail_cache[6-2])
00248             blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
00249         if(r->avail_cache[6-5])
00250             blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
00251     }
00252 
00253     for(i = 0; i < RV34_MB_TYPES; i++){
00254         if(blocks[i] > count){
00255             count = blocks[i];
00256             prev_type = i;
00257         }
00258     }
00259     if(s->pict_type == AV_PICTURE_TYPE_P){
00260         prev_type = block_num_to_ptype_vlc_num[prev_type];
00261         q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
00262         if(q < PBTYPE_ESCAPE)
00263             return q;
00264         q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
00265         av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
00266     }else{
00267         prev_type = block_num_to_btype_vlc_num[prev_type];
00268         q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
00269         if(q < PBTYPE_ESCAPE)
00270             return q;
00271         q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
00272         av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
00273     }
00274     return 0;
00275 }
00276 
00277 enum RV40BlockPos{
00278     POS_CUR,
00279     POS_TOP,
00280     POS_LEFT,
00281     POS_BOTTOM,
00282 };
00283 
00284 #define MASK_CUR          0x0001
00285 #define MASK_RIGHT        0x0008
00286 #define MASK_BOTTOM       0x0010
00287 #define MASK_TOP          0x1000
00288 #define MASK_Y_TOP_ROW    0x000F
00289 #define MASK_Y_LAST_ROW   0xF000
00290 #define MASK_Y_LEFT_COL   0x1111
00291 #define MASK_Y_RIGHT_COL  0x8888
00292 #define MASK_C_TOP_ROW    0x0003
00293 #define MASK_C_LAST_ROW   0x000C
00294 #define MASK_C_LEFT_COL   0x0005
00295 #define MASK_C_RIGHT_COL  0x000A
00296 
00297 static const int neighbour_offs_x[4] = { 0,  0, -1, 0 };
00298 static const int neighbour_offs_y[4] = { 0, -1,  0, 1 };
00299 
00300 static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp,
00301                                       uint8_t *src, int stride, int dmode,
00302                                       int lim_q1, int lim_p1,
00303                                       int alpha, int beta, int beta2,
00304                                       int chroma, int edge, int dir)
00305 {
00306     int filter_p1, filter_q1;
00307     int strong;
00308     int lims;
00309 
00310     strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2,
00311                                                   edge, &filter_p1, &filter_q1);
00312 
00313     lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
00314 
00315     if (strong) {
00316         rdsp->rv40_strong_loop_filter[dir](src, stride, alpha,
00317                                            lims, dmode, chroma);
00318     } else if (filter_p1 & filter_q1) {
00319         rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta,
00320                                          lims, lim_q1, lim_p1);
00321     } else if (filter_p1 | filter_q1) {
00322         rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1,
00323                                          alpha, beta, lims >> 1, lim_q1 >> 1,
00324                                          lim_p1 >> 1);
00325     }
00326 }
00327 
00331 static void rv40_loop_filter(RV34DecContext *r, int row)
00332 {
00333     MpegEncContext *s = &r->s;
00334     int mb_pos, mb_x;
00335     int i, j, k;
00336     uint8_t *Y, *C;
00337     int alpha, beta, betaY, betaC;
00338     int q;
00339     int mbtype[4];   
00340 
00344     int mb_strong[4];
00345     int clip[4];     
00346 
00352     int cbp[4];
00357     int uvcbp[4][2];
00363     int mvmasks[4];
00364 
00365     mb_pos = row * s->mb_stride;
00366     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
00367         int mbtype = s->current_picture_ptr->f.mb_type[mb_pos];
00368         if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
00369             r->cbp_luma  [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
00370         if(IS_INTRA(mbtype))
00371             r->cbp_chroma[mb_pos] = 0xFF;
00372     }
00373     mb_pos = row * s->mb_stride;
00374     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
00375         int y_h_deblock, y_v_deblock;
00376         int c_v_deblock[2], c_h_deblock[2];
00377         int clip_left;
00378         int avail[4];
00379         int y_to_deblock, c_to_deblock[2];
00380 
00381         q = s->current_picture_ptr->f.qscale_table[mb_pos];
00382         alpha = rv40_alpha_tab[q];
00383         beta  = rv40_beta_tab [q];
00384         betaY = betaC = beta * 3;
00385         if(s->width * s->height <= 176*144)
00386             betaY += beta;
00387 
00388         avail[0] = 1;
00389         avail[1] = row;
00390         avail[2] = mb_x;
00391         avail[3] = row < s->mb_height - 1;
00392         for(i = 0; i < 4; i++){
00393             if(avail[i]){
00394                 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
00395                 mvmasks[i] = r->deblock_coefs[pos];
00396                 mbtype [i] = s->current_picture_ptr->f.mb_type[pos];
00397                 cbp    [i] = r->cbp_luma[pos];
00398                 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
00399                 uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
00400             }else{
00401                 mvmasks[i] = 0;
00402                 mbtype [i] = mbtype[0];
00403                 cbp    [i] = 0;
00404                 uvcbp[i][0] = uvcbp[i][1] = 0;
00405             }
00406             mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
00407             clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
00408         }
00409         y_to_deblock =  mvmasks[POS_CUR]
00410                      | (mvmasks[POS_BOTTOM] << 16);
00411         /* This pattern contains bits signalling that horizontal edges of
00412          * the current block can be filtered.
00413          * That happens when either of adjacent subblocks is coded or lies on
00414          * the edge of 8x8 blocks with motion vectors differing by more than
00415          * 3/4 pel in any component (any edge orientation for some reason).
00416          */
00417         y_h_deblock =   y_to_deblock
00418                     | ((cbp[POS_CUR]                           <<  4) & ~MASK_Y_TOP_ROW)
00419                     | ((cbp[POS_TOP]        & MASK_Y_LAST_ROW) >> 12);
00420         /* This pattern contains bits signalling that vertical edges of
00421          * the current block can be filtered.
00422          * That happens when either of adjacent subblocks is coded or lies on
00423          * the edge of 8x8 blocks with motion vectors differing by more than
00424          * 3/4 pel in any component (any edge orientation for some reason).
00425          */
00426         y_v_deblock =   y_to_deblock
00427                     | ((cbp[POS_CUR]                      << 1) & ~MASK_Y_LEFT_COL)
00428                     | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
00429         if(!mb_x)
00430             y_v_deblock &= ~MASK_Y_LEFT_COL;
00431         if(!row)
00432             y_h_deblock &= ~MASK_Y_TOP_ROW;
00433         if(row == s->mb_height - 1 || (mb_strong[POS_CUR] || mb_strong[POS_BOTTOM]))
00434             y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
00435         /* Calculating chroma patterns is similar and easier since there is
00436          * no motion vector pattern for them.
00437          */
00438         for(i = 0; i < 2; i++){
00439             c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
00440             c_v_deblock[i] =   c_to_deblock[i]
00441                            | ((uvcbp[POS_CUR] [i]                       << 1) & ~MASK_C_LEFT_COL)
00442                            | ((uvcbp[POS_LEFT][i]   & MASK_C_RIGHT_COL) >> 1);
00443             c_h_deblock[i] =   c_to_deblock[i]
00444                            | ((uvcbp[POS_TOP][i]    & MASK_C_LAST_ROW)  >> 2)
00445                            |  (uvcbp[POS_CUR][i]                        << 2);
00446             if(!mb_x)
00447                 c_v_deblock[i] &= ~MASK_C_LEFT_COL;
00448             if(!row)
00449                 c_h_deblock[i] &= ~MASK_C_TOP_ROW;
00450             if(row == s->mb_height - 1 || mb_strong[POS_CUR] || mb_strong[POS_BOTTOM])
00451                 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
00452         }
00453 
00454         for(j = 0; j < 16; j += 4){
00455             Y = s->current_picture_ptr->f.data[0] + mb_x*16 + (row*16 + j) * s->linesize;
00456             for(i = 0; i < 4; i++, Y += 4){
00457                 int ij = i + j;
00458                 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
00459                 int dither = j ? ij : i*4;
00460 
00461                 // if bottom block is coded then we can filter its top edge
00462                 // (or bottom edge of this block, which is the same)
00463                 if(y_h_deblock & (MASK_BOTTOM << ij)){
00464                     rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize,
00465                                               s->linesize, dither,
00466                                               y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
00467                                               clip_cur, alpha, beta, betaY,
00468                                               0, 0, 0);
00469                 }
00470                 // filter left block edge in ordinary mode (with low filtering strength)
00471                 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){
00472                     if(!i)
00473                         clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
00474                     else
00475                         clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
00476                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
00477                                               clip_cur,
00478                                               clip_left,
00479                                               alpha, beta, betaY, 0, 0, 1);
00480                 }
00481                 // filter top edge of the current macroblock when filtering strength is high
00482                 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){
00483                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
00484                                        clip_cur,
00485                                        mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
00486                                        alpha, beta, betaY, 0, 1, 0);
00487                 }
00488                 // filter left block edge in edge mode (with high filtering strength)
00489                 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){
00490                     clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
00491                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
00492                                        clip_cur,
00493                                        clip_left,
00494                                        alpha, beta, betaY, 0, 1, 1);
00495                 }
00496             }
00497         }
00498         for(k = 0; k < 2; k++){
00499             for(j = 0; j < 2; j++){
00500                 C = s->current_picture_ptr->f.data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
00501                 for(i = 0; i < 2; i++, C += 4){
00502                     int ij = i + j*2;
00503                     int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
00504                     if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
00505                         int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
00506                         rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8,
00507                                            clip_bot,
00508                                            clip_cur,
00509                                            alpha, beta, betaC, 1, 0, 0);
00510                     }
00511                     if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){
00512                         if(!i)
00513                             clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
00514                         else
00515                             clip_left = c_to_deblock[k]    & (MASK_CUR << (ij-1))  ? clip[POS_CUR]  : 0;
00516                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
00517                                            clip_cur,
00518                                            clip_left,
00519                                            alpha, beta, betaC, 1, 0, 1);
00520                     }
00521                     if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){
00522                         int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
00523                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8,
00524                                            clip_cur,
00525                                            clip_top,
00526                                            alpha, beta, betaC, 1, 1, 0);
00527                     }
00528                     if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){
00529                         clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
00530                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
00531                                            clip_cur,
00532                                            clip_left,
00533                                            alpha, beta, betaC, 1, 1, 1);
00534                     }
00535                 }
00536             }
00537         }
00538     }
00539 }
00540 
00544 static av_cold int rv40_decode_init(AVCodecContext *avctx)
00545 {
00546     RV34DecContext *r = avctx->priv_data;
00547 
00548     r->rv30 = 0;
00549     ff_rv34_decode_init(avctx);
00550     if(!aic_top_vlc.bits)
00551         rv40_init_tables();
00552     r->parse_slice_header = rv40_parse_slice_header;
00553     r->decode_intra_types = rv40_decode_intra_types;
00554     r->decode_mb_info     = rv40_decode_mb_info;
00555     r->loop_filter        = rv40_loop_filter;
00556     r->luma_dc_quant_i = rv40_luma_dc_quant[0];
00557     r->luma_dc_quant_p = rv40_luma_dc_quant[1];
00558     return 0;
00559 }
00560 
00561 AVCodec ff_rv40_decoder = {
00562     .name           = "rv40",
00563     .type           = AVMEDIA_TYPE_VIDEO,
00564     .id             = CODEC_ID_RV40,
00565     .priv_data_size = sizeof(RV34DecContext),
00566     .init           = rv40_decode_init,
00567     .close          = ff_rv34_decode_end,
00568     .decode         = ff_rv34_decode_frame,
00569     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS,
00570     .flush          = ff_mpeg_flush,
00571     .long_name      = NULL_IF_CONFIG_SMALL("RealVideo 4.0"),
00572     .pix_fmts       = ff_pixfmt_list_420,
00573     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
00574     .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
00575 };