LCOV - code coverage report
Current view: top level - libavcodec - rv40.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 259 274 94.5 %
Date: 2017-12-16 13:57:32 Functions: 9 9 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RV40 decoder
       3             :  * Copyright (c) 2007 Konstantin Shishkov
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * RV40 decoder
      25             :  */
      26             : 
      27             : #include "libavutil/imgutils.h"
      28             : 
      29             : #include "avcodec.h"
      30             : #include "mpegutils.h"
      31             : #include "mpegvideo.h"
      32             : #include "golomb.h"
      33             : 
      34             : #include "rv34.h"
      35             : #include "rv40vlc2.h"
      36             : #include "rv40data.h"
      37             : 
      38             : static VLC aic_top_vlc;
      39             : static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM];
      40             : static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS];
      41             : 
      42             : static const int16_t mode2_offs[] = {
      43             :        0,  614, 1222, 1794, 2410,  3014,  3586,  4202,  4792, 5382, 5966, 6542,
      44             :     7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814
      45             : };
      46             : 
      47             : /**
      48             :  * Initialize all tables.
      49             :  */
      50           2 : static av_cold void rv40_init_tables(void)
      51             : {
      52             :     int i;
      53             :     static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2];
      54             :     static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2];
      55             :     static VLC_TYPE aic_mode2_table[11814][2];
      56             :     static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2];
      57             :     static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2];
      58             : 
      59           2 :     aic_top_vlc.table = aic_table;
      60           2 :     aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS;
      61           2 :     init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE,
      62             :              rv40_aic_top_vlc_bits,  1, 1,
      63             :              rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
      64         182 :     for(i = 0; i < AIC_MODE1_NUM; i++){
      65             :         // Every tenth VLC table is empty
      66         180 :         if((i % 10) == 9) continue;
      67         162 :         aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS];
      68         162 :         aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS;
      69         162 :         init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE,
      70             :                  aic_mode1_vlc_bits[i],  1, 1,
      71             :                  aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
      72             :     }
      73          42 :     for(i = 0; i < AIC_MODE2_NUM; i++){
      74          40 :         aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]];
      75          40 :         aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i];
      76          40 :         init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE,
      77             :                  aic_mode2_vlc_bits[i],  1, 1,
      78             :                  aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
      79             :     }
      80          16 :     for(i = 0; i < NUM_PTYPE_VLCS; i++){
      81          14 :         ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS];
      82          14 :         ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS;
      83          14 :         ff_init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE,
      84          14 :                             ptype_vlc_bits[i],  1, 1,
      85          14 :                             ptype_vlc_codes[i], 1, 1,
      86             :                             ptype_vlc_syms,     1, 1, INIT_VLC_USE_NEW_STATIC);
      87             :     }
      88          14 :     for(i = 0; i < NUM_BTYPE_VLCS; i++){
      89          12 :         btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS];
      90          12 :         btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS;
      91          12 :         ff_init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE,
      92          12 :                             btype_vlc_bits[i],  1, 1,
      93          12 :                             btype_vlc_codes[i], 1, 1,
      94             :                             btype_vlc_syms,     1, 1, INIT_VLC_USE_NEW_STATIC);
      95             :     }
      96           2 : }
      97             : 
      98             : /**
      99             :  * Get stored dimension from bitstream.
     100             :  *
     101             :  * If the width/height is the standard one then it's coded as a 3-bit index.
     102             :  * Otherwise it is coded as escaped 8-bit portions.
     103             :  */
     104         112 : static int get_dimension(GetBitContext *gb, const int *dim)
     105             : {
     106         112 :     int t   = get_bits(gb, 3);
     107         112 :     int val = dim[t];
     108         112 :     if(val < 0)
     109          56 :         val = dim[get_bits1(gb) - val];
     110         112 :     if(!val){
     111             :         do{
     112         112 :             if (get_bits_left(gb) < 8)
     113           0 :                 return AVERROR_INVALIDDATA;
     114         112 :             t = get_bits(gb, 8);
     115         112 :             val += t << 2;
     116         112 :         }while(t == 0xFF);
     117             :     }
     118         112 :     return val;
     119             : }
     120             : 
     121             : /**
     122             :  * Get encoded picture size - usually this is called from rv40_parse_slice_header.
     123             :  */
     124          56 : static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
     125             : {
     126          56 :     *w = get_dimension(gb, rv40_standard_widths);
     127          56 :     *h = get_dimension(gb, rv40_standard_heights);
     128          56 : }
     129             : 
     130        2064 : static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
     131             : {
     132             :     int mb_bits;
     133        2064 :     int w = r->s.width, h = r->s.height;
     134             :     int mb_size;
     135             :     int ret;
     136             : 
     137        2064 :     memset(si, 0, sizeof(SliceInfo));
     138        2064 :     if(get_bits1(gb))
     139           0 :         return AVERROR_INVALIDDATA;
     140        2064 :     si->type = get_bits(gb, 2);
     141        2064 :     if(si->type == 1) si->type = 0;
     142        2064 :     si->quant = get_bits(gb, 5);
     143        2064 :     if(get_bits(gb, 2))
     144           0 :         return AVERROR_INVALIDDATA;
     145        2064 :     si->vlc_set = get_bits(gb, 2);
     146        2064 :     skip_bits1(gb);
     147        2064 :     si->pts = get_bits(gb, 13);
     148        2064 :     if(!si->type || !get_bits1(gb))
     149          56 :         rv40_parse_picture_size(gb, &w, &h);
     150        2064 :     if ((ret = av_image_check_size(w, h, 0, r->s.avctx)) < 0)
     151           0 :         return ret;
     152        2064 :     si->width  = w;
     153        2064 :     si->height = h;
     154        2064 :     mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
     155        2064 :     mb_bits = ff_rv34_get_start_offset(gb, mb_size);
     156        2064 :     si->start = get_bits(gb, mb_bits);
     157             : 
     158        2064 :     return 0;
     159             : }
     160             : 
     161             : /**
     162             :  * Decode 4x4 intra types array.
     163             :  */
     164       12372 : static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
     165             : {
     166       12372 :     MpegEncContext *s = &r->s;
     167             :     int i, j, k, v;
     168             :     int A, B, C;
     169             :     int pattern;
     170             :     int8_t *ptr;
     171             : 
     172       61860 :     for(i = 0; i < 4; i++, dst += r->intra_types_stride){
     173       49488 :         if(!i && s->first_slice_line){
     174        4856 :             pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1);
     175        4856 :             dst[0] = (pattern >> 2) & 2;
     176        4856 :             dst[1] = (pattern >> 1) & 2;
     177        4856 :             dst[2] =  pattern       & 2;
     178        4856 :             dst[3] = (pattern << 1) & 2;
     179        4856 :             continue;
     180             :         }
     181       44632 :         ptr = dst;
     182      190656 :         for(j = 0; j < 4; j++){
     183             :             /* Coefficients are read using VLC chosen by the prediction pattern
     184             :              * The first one (used for retrieving a pair of coefficients) is
     185             :              * constructed from the top, top right and left coefficients
     186             :              * The second one (used for retrieving only one coefficient) is
     187             :              * top + 10 * left.
     188             :              */
     189      146024 :             A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row
     190      146024 :             B = ptr[-r->intra_types_stride];
     191      146024 :             C = ptr[-1];
     192      146024 :             pattern = A + B * (1 << 4) + C * (1 << 8);
     193     2593089 :             for(k = 0; k < MODE2_PATTERNS_NUM; k++)
     194     2480499 :                 if(pattern == rv40_aic_table_index[k])
     195       33434 :                     break;
     196      146024 :             if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
     197       32504 :                 v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2);
     198       32504 :                 *ptr++ = v/9;
     199       32504 :                 *ptr++ = v%9;
     200       32504 :                 j++;
     201             :             }else{
     202      113520 :                 if(B != -1 && C != -1)
     203      111222 :                     v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1);
     204             :                 else{ // tricky decoding
     205        2298 :                     v = 0;
     206        2298 :                     switch(C){
     207        2298 :                     case -1: // code 0 -> 1, 1 -> 0
     208        2298 :                         if(B < 2)
     209        2298 :                             v = get_bits1(gb) ^ 1;
     210        2298 :                         break;
     211           0 :                     case  0:
     212             :                     case  2: // code 0 -> 2, 1 -> 0
     213           0 :                         v = (get_bits1(gb) ^ 1) << 1;
     214           0 :                         break;
     215             :                     }
     216             :                 }
     217      113520 :                 *ptr++ = v;
     218             :             }
     219             :         }
     220             :     }
     221       12372 :     return 0;
     222             : }
     223             : 
     224             : /**
     225             :  * Decode macroblock information.
     226             :  */
     227      216000 : static int rv40_decode_mb_info(RV34DecContext *r)
     228             : {
     229      216000 :     MpegEncContext *s = &r->s;
     230      216000 :     GetBitContext *gb = &s->gb;
     231             :     int q, i;
     232      216000 :     int prev_type = 0;
     233      216000 :     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
     234             : 
     235      216000 :     if(!r->s.mb_skip_run) {
     236       80045 :         r->s.mb_skip_run = get_interleaved_ue_golomb(gb) + 1;
     237       80045 :         if(r->s.mb_skip_run > (unsigned)s->mb_num)
     238           0 :             return -1;
     239             :     }
     240             : 
     241      216000 :     if(--r->s.mb_skip_run)
     242      136461 :          return RV34_MB_SKIP;
     243             : 
     244       79539 :     if(r->avail_cache[6-4]){
     245       60557 :         int blocks[RV34_MB_TYPES] = {0};
     246       60557 :         int count = 0;
     247       60557 :         if(r->avail_cache[6-1])
     248       58685 :             blocks[r->mb_type[mb_pos - 1]]++;
     249       60557 :         blocks[r->mb_type[mb_pos - s->mb_stride]]++;
     250       60557 :         if(r->avail_cache[6-2])
     251       59440 :             blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
     252       60557 :         if(r->avail_cache[6-5])
     253       58378 :             blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
     254      360282 :         for(i = 0; i < RV34_MB_TYPES; i++){
     255      357222 :             if(blocks[i] > count){
     256       80201 :                 count = blocks[i];
     257       80201 :                 prev_type = i;
     258       80201 :                 if(count>1)
     259       57497 :                     break;
     260             :             }
     261             :         }
     262       18982 :     } else if (r->avail_cache[6-1])
     263       18051 :         prev_type = r->mb_type[mb_pos - 1];
     264             : 
     265       79539 :     if(s->pict_type == AV_PICTURE_TYPE_P){
     266       25793 :         prev_type = block_num_to_ptype_vlc_num[prev_type];
     267       25793 :         q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
     268       25793 :         if(q < PBTYPE_ESCAPE)
     269       25793 :             return q;
     270           0 :         q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
     271           0 :         av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
     272             :     }else{
     273       53746 :         prev_type = block_num_to_btype_vlc_num[prev_type];
     274       53746 :         q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
     275       53746 :         if(q < PBTYPE_ESCAPE)
     276       53746 :             return q;
     277           0 :         q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
     278           0 :         av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
     279             :     }
     280           0 :     return 0;
     281             : }
     282             : 
     283             : enum RV40BlockPos{
     284             :     POS_CUR,
     285             :     POS_TOP,
     286             :     POS_LEFT,
     287             :     POS_BOTTOM,
     288             : };
     289             : 
     290             : #define MASK_CUR          0x0001
     291             : #define MASK_RIGHT        0x0008
     292             : #define MASK_BOTTOM       0x0010
     293             : #define MASK_TOP          0x1000
     294             : #define MASK_Y_TOP_ROW    0x000F
     295             : #define MASK_Y_LAST_ROW   0xF000
     296             : #define MASK_Y_LEFT_COL   0x1111
     297             : #define MASK_Y_RIGHT_COL  0x8888
     298             : #define MASK_C_TOP_ROW    0x0003
     299             : #define MASK_C_LAST_ROW   0x000C
     300             : #define MASK_C_LEFT_COL   0x0005
     301             : #define MASK_C_RIGHT_COL  0x000A
     302             : 
     303             : static const int neighbour_offs_x[4] = { 0,  0, -1, 0 };
     304             : static const int neighbour_offs_y[4] = { 0, -1,  0, 1 };
     305             : 
     306     2315053 : static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp,
     307             :                                       uint8_t *src, int stride, int dmode,
     308             :                                       int lim_q1, int lim_p1,
     309             :                                       int alpha, int beta, int beta2,
     310             :                                       int chroma, int edge, int dir)
     311             : {
     312             :     int filter_p1, filter_q1;
     313             :     int strong;
     314             :     int lims;
     315             : 
     316     2315053 :     strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2,
     317             :                                                   edge, &filter_p1, &filter_q1);
     318             : 
     319     2315053 :     lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
     320             : 
     321     2315053 :     if (strong) {
     322      328913 :         rdsp->rv40_strong_loop_filter[dir](src, stride, alpha,
     323             :                                            lims, dmode, chroma);
     324     1986140 :     } else if (filter_p1 & filter_q1) {
     325     1247984 :         rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta,
     326             :                                          lims, lim_q1, lim_p1);
     327      738156 :     } else if (filter_p1 | filter_q1) {
     328      240995 :         rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1,
     329             :                                          alpha, beta, lims >> 1, lim_q1 >> 1,
     330             :                                          lim_p1 >> 1);
     331             :     }
     332     2315053 : }
     333             : 
     334             : /**
     335             :  * RV40 loop filtering function
     336             :  */
     337        6100 : static void rv40_loop_filter(RV34DecContext *r, int row)
     338             : {
     339        6100 :     MpegEncContext *s = &r->s;
     340             :     int mb_pos, mb_x;
     341             :     int i, j, k;
     342             :     uint8_t *Y, *C;
     343             :     int alpha, beta, betaY, betaC;
     344             :     int q;
     345             :     int mbtype[4];   ///< current macroblock and its neighbours types
     346             :     /**
     347             :      * flags indicating that macroblock can be filtered with strong filter
     348             :      * it is set only for intra coded MB and MB with DCs coded separately
     349             :      */
     350             :     int mb_strong[4];
     351             :     int clip[4];     ///< MB filter clipping value calculated from filtering strength
     352             :     /**
     353             :      * coded block patterns for luma part of current macroblock and its neighbours
     354             :      * Format:
     355             :      * LSB corresponds to the top left block,
     356             :      * each nibble represents one row of subblocks.
     357             :      */
     358             :     int cbp[4];
     359             :     /**
     360             :      * coded block patterns for chroma part of current macroblock and its neighbours
     361             :      * Format is the same as for luma with two subblocks in a row.
     362             :      */
     363             :     int uvcbp[4][2];
     364             :     /**
     365             :      * This mask represents the pattern of luma subblocks that should be filtered
     366             :      * in addition to the coded ones because they lie at the edge of
     367             :      * 8x8 block with different enough motion vectors
     368             :      */
     369             :     unsigned mvmasks[4];
     370             : 
     371        6100 :     mb_pos = row * s->mb_stride;
     372      225700 :     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
     373      219600 :         int mbtype = s->current_picture_ptr->mb_type[mb_pos];
     374      219600 :         if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
     375       23358 :             r->cbp_luma  [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
     376      219600 :         if(IS_INTRA(mbtype))
     377       22811 :             r->cbp_chroma[mb_pos] = 0xFF;
     378             :     }
     379        6100 :     mb_pos = row * s->mb_stride;
     380      225700 :     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
     381             :         int y_h_deblock, y_v_deblock;
     382             :         int c_v_deblock[2], c_h_deblock[2];
     383             :         int clip_left;
     384             :         int avail[4];
     385             :         unsigned y_to_deblock;
     386             :         int c_to_deblock[2];
     387             : 
     388      219600 :         q = s->current_picture_ptr->qscale_table[mb_pos];
     389      219600 :         alpha = rv40_alpha_tab[q];
     390      219600 :         beta  = rv40_beta_tab [q];
     391      219600 :         betaY = betaC = beta * 3;
     392      219600 :         if(s->width * s->height <= 176*144)
     393           0 :             betaY += beta;
     394             : 
     395      219600 :         avail[0] = 1;
     396      219600 :         avail[1] = row;
     397      219600 :         avail[2] = mb_x;
     398      219600 :         avail[3] = row < s->mb_height - 1;
     399     1098000 :         for(i = 0; i < 4; i++){
     400      878400 :             if(avail[i]){
     401      850340 :                 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
     402      850340 :                 mvmasks[i] = r->deblock_coefs[pos];
     403      850340 :                 mbtype [i] = s->current_picture_ptr->mb_type[pos];
     404      850340 :                 cbp    [i] = r->cbp_luma[pos];
     405      850340 :                 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
     406      850340 :                 uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
     407             :             }else{
     408       28060 :                 mvmasks[i] = 0;
     409       28060 :                 mbtype [i] = mbtype[0];
     410       28060 :                 cbp    [i] = 0;
     411       28060 :                 uvcbp[i][0] = uvcbp[i][1] = 0;
     412             :             }
     413      878400 :             mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
     414      878400 :             clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
     415             :         }
     416      439200 :         y_to_deblock =  mvmasks[POS_CUR]
     417      219600 :                      | (mvmasks[POS_BOTTOM] << 16);
     418             :         /* This pattern contains bits signalling that horizontal edges of
     419             :          * the current block can be filtered.
     420             :          * That happens when either of adjacent subblocks is coded or lies on
     421             :          * the edge of 8x8 blocks with motion vectors differing by more than
     422             :          * 3/4 pel in any component (any edge orientation for some reason).
     423             :          */
     424      219600 :         y_h_deblock =   y_to_deblock
     425      219600 :                     | ((cbp[POS_CUR]                           <<  4) & ~MASK_Y_TOP_ROW)
     426      219600 :                     | ((cbp[POS_TOP]        & MASK_Y_LAST_ROW) >> 12);
     427             :         /* This pattern contains bits signalling that vertical edges of
     428             :          * the current block can be filtered.
     429             :          * That happens when either of adjacent subblocks is coded or lies on
     430             :          * the edge of 8x8 blocks with motion vectors differing by more than
     431             :          * 3/4 pel in any component (any edge orientation for some reason).
     432             :          */
     433      219600 :         y_v_deblock =   y_to_deblock
     434      219600 :                     | ((cbp[POS_CUR]                      << 1) & ~MASK_Y_LEFT_COL)
     435      219600 :                     | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
     436      219600 :         if(!mb_x)
     437        6100 :             y_v_deblock &= ~MASK_Y_LEFT_COL;
     438      219600 :         if(!row)
     439       10980 :             y_h_deblock &= ~MASK_Y_TOP_ROW;
     440      219600 :         if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
     441       44066 :             y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
     442             :         /* Calculating chroma patterns is similar and easier since there is
     443             :          * no motion vector pattern for them.
     444             :          */
     445      658800 :         for(i = 0; i < 2; i++){
     446      439200 :             c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
     447      878400 :             c_v_deblock[i] =   c_to_deblock[i]
     448      439200 :                            | ((uvcbp[POS_CUR] [i]                       << 1) & ~MASK_C_LEFT_COL)
     449      439200 :                            | ((uvcbp[POS_LEFT][i]   & MASK_C_RIGHT_COL) >> 1);
     450      878400 :             c_h_deblock[i] =   c_to_deblock[i]
     451      439200 :                            | ((uvcbp[POS_TOP][i]    & MASK_C_LAST_ROW)  >> 2)
     452      439200 :                            |  (uvcbp[POS_CUR][i]                        << 2);
     453      439200 :             if(!mb_x)
     454       12200 :                 c_v_deblock[i] &= ~MASK_C_LEFT_COL;
     455      439200 :             if(!row)
     456       21960 :                 c_h_deblock[i] &= ~MASK_C_TOP_ROW;
     457      439200 :             if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
     458       88132 :                 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
     459             :         }
     460             : 
     461     1098000 :         for(j = 0; j < 16; j += 4){
     462      878400 :             Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
     463     4392000 :             for(i = 0; i < 4; i++, Y += 4){
     464     3513600 :                 int ij = i + j;
     465     3513600 :                 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
     466     3513600 :                 int dither = j ? ij : i*4;
     467             : 
     468             :                 // if bottom block is coded then we can filter its top edge
     469             :                 // (or bottom edge of this block, which is the same)
     470     3513600 :                 if(y_h_deblock & (MASK_BOTTOM << ij)){
     471     1411936 :                     rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize,
     472      705968 :                                               s->linesize, dither,
     473      705968 :                                               y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
     474             :                                               clip_cur, alpha, beta, betaY,
     475             :                                               0, 0, 0);
     476             :                 }
     477             :                 // filter left block edge in ordinary mode (with low filtering strength)
     478     3513600 :                 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
     479      703622 :                     if(!i)
     480      140445 :                         clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
     481             :                     else
     482      563177 :                         clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
     483      703622 :                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
     484             :                                               clip_cur,
     485             :                                               clip_left,
     486             :                                               alpha, beta, betaY, 0, 0, 1);
     487             :                 }
     488             :                 // filter top edge of the current macroblock when filtering strength is high
     489     3513600 :                 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
     490      132344 :                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
     491             :                                        clip_cur,
     492      132344 :                                        mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
     493             :                                        alpha, beta, betaY, 0, 1, 0);
     494             :                 }
     495             :                 // filter left block edge in edge mode (with high filtering strength)
     496     3513600 :                 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
     497      121464 :                     clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
     498      121464 :                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
     499             :                                        clip_cur,
     500             :                                        clip_left,
     501             :                                        alpha, beta, betaY, 0, 1, 1);
     502             :                 }
     503             :             }
     504             :         }
     505      658800 :         for(k = 0; k < 2; k++){
     506     1317600 :             for(j = 0; j < 2; j++){
     507      878400 :                 C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
     508     2635200 :                 for(i = 0; i < 2; i++, C += 4){
     509     1756800 :                     int ij = i + j*2;
     510     1756800 :                     int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
     511     1756800 :                     if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
     512      201976 :                         int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
     513      201976 :                         rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8,
     514             :                                            clip_bot,
     515             :                                            clip_cur,
     516             :                                            alpha, beta, betaC, 1, 0, 0);
     517             :                     }
     518     1756800 :                     if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
     519      199885 :                         if(!i)
     520       48364 :                             clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
     521             :                         else
     522      151521 :                             clip_left = c_to_deblock[k]    & (MASK_CUR << (ij-1))  ? clip[POS_CUR]  : 0;
     523      199885 :                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
     524             :                                            clip_cur,
     525             :                                            clip_left,
     526             :                                            alpha, beta, betaC, 1, 0, 1);
     527             :                     }
     528     1756800 :                     if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
     529      130217 :                         int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
     530      130217 :                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8,
     531             :                                            clip_cur,
     532             :                                            clip_top,
     533             :                                            alpha, beta, betaC, 1, 1, 0);
     534             :                     }
     535     1756800 :                     if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
     536      119577 :                         clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
     537      119577 :                         rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
     538             :                                            clip_cur,
     539             :                                            clip_left,
     540             :                                            alpha, beta, betaC, 1, 1, 1);
     541             :                     }
     542             :                 }
     543             :             }
     544             :         }
     545             :     }
     546        6100 : }
     547             : 
     548             : /**
     549             :  * Initialize decoder.
     550             :  */
     551           4 : static av_cold int rv40_decode_init(AVCodecContext *avctx)
     552             : {
     553           4 :     RV34DecContext *r = avctx->priv_data;
     554             :     int ret;
     555             : 
     556           4 :     r->rv30 = 0;
     557           4 :     if ((ret = ff_rv34_decode_init(avctx)) < 0)
     558           0 :         return ret;
     559           4 :     if(!aic_top_vlc.bits)
     560           2 :         rv40_init_tables();
     561           4 :     r->parse_slice_header = rv40_parse_slice_header;
     562           4 :     r->decode_intra_types = rv40_decode_intra_types;
     563           4 :     r->decode_mb_info     = rv40_decode_mb_info;
     564           4 :     r->loop_filter        = rv40_loop_filter;
     565           4 :     r->luma_dc_quant_i = rv40_luma_dc_quant[0];
     566           4 :     r->luma_dc_quant_p = rv40_luma_dc_quant[1];
     567           4 :     return 0;
     568             : }
     569             : 
     570             : AVCodec ff_rv40_decoder = {
     571             :     .name                  = "rv40",
     572             :     .long_name             = NULL_IF_CONFIG_SMALL("RealVideo 4.0"),
     573             :     .type                  = AVMEDIA_TYPE_VIDEO,
     574             :     .id                    = AV_CODEC_ID_RV40,
     575             :     .priv_data_size        = sizeof(RV34DecContext),
     576             :     .init                  = rv40_decode_init,
     577             :     .close                 = ff_rv34_decode_end,
     578             :     .decode                = ff_rv34_decode_frame,
     579             :     .capabilities          = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
     580             :                              AV_CODEC_CAP_FRAME_THREADS,
     581             :     .flush                 = ff_mpeg_flush,
     582             :     .pix_fmts              = (const enum AVPixelFormat[]) {
     583             :         AV_PIX_FMT_YUV420P,
     584             :         AV_PIX_FMT_NONE
     585             :     },
     586             :     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
     587             :     .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
     588             : };

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