LCOV - code coverage report
Current view: top level - libavcodec - rv30.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 151 174 86.8 %
Date: 2017-12-13 18:07:29 Functions: 6 6 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RV30 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             :  * RV30 decoder
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "mpegutils.h"
      29             : #include "mpegvideo.h"
      30             : #include "golomb.h"
      31             : 
      32             : #include "rv34.h"
      33             : #include "rv30data.h"
      34             : 
      35             : 
      36         707 : static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
      37             : {
      38         707 :     AVCodecContext *avctx = r->s.avctx;
      39             :     int mb_bits;
      40         707 :     int w = r->s.width, h = r->s.height;
      41             :     int mb_size;
      42             :     int rpr;
      43             : 
      44         707 :     memset(si, 0, sizeof(SliceInfo));
      45         707 :     if(get_bits(gb, 3))
      46           1 :         return -1;
      47         706 :     si->type = get_bits(gb, 2);
      48         706 :     if(si->type == 1) si->type = 0;
      49         706 :     if(get_bits1(gb))
      50           0 :         return -1;
      51         706 :     si->quant = get_bits(gb, 5);
      52         706 :     skip_bits1(gb);
      53         706 :     si->pts = get_bits(gb, 13);
      54         706 :     rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
      55         706 :     if(rpr){
      56           0 :         if (rpr > r->max_rpr) {
      57           0 :             av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
      58           0 :             return AVERROR_INVALIDDATA;
      59             :         }
      60             : 
      61           0 :         if (avctx->extradata_size < rpr * 2 + 8) {
      62           0 :             av_log(avctx, AV_LOG_ERROR,
      63             :                    "Insufficient extradata - need at least %d bytes, got %d\n",
      64           0 :                    8 + rpr * 2, avctx->extradata_size);
      65           0 :             return AVERROR(EINVAL);
      66             :         }
      67             : 
      68           0 :         w = r->s.avctx->extradata[6 + rpr*2] << 2;
      69           0 :         h = r->s.avctx->extradata[7 + rpr*2] << 2;
      70             :     } else {
      71         706 :         w = r->orig_width;
      72         706 :         h = r->orig_height;
      73             :     }
      74         706 :     si->width  = w;
      75         706 :     si->height = h;
      76         706 :     mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
      77         706 :     mb_bits = ff_rv34_get_start_offset(gb, mb_size);
      78         706 :     si->start = get_bits(gb, mb_bits);
      79         706 :     skip_bits1(gb);
      80         706 :     return 0;
      81             : }
      82             : 
      83             : /**
      84             :  * Decode 4x4 intra types array.
      85             :  */
      86        2739 : static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
      87             : {
      88             :     int i, j, k;
      89             : 
      90       13695 :     for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
      91       32868 :         for(j = 0; j < 4; j+= 2){
      92       21912 :             unsigned code = get_interleaved_ue_golomb(gb) << 1;
      93       21912 :             if (code > 80U*2U) {
      94           0 :                 av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
      95           0 :                 return -1;
      96             :             }
      97       65736 :             for(k = 0; k < 2; k++){
      98       43824 :                 int A = dst[-r->intra_types_stride] + 1;
      99       43824 :                 int B = dst[-1] + 1;
     100       43824 :                 *dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
     101       43824 :                 if(dst[-1] == 9){
     102           0 :                     av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
     103           0 :                     return -1;
     104             :                 }
     105             :             }
     106             :         }
     107             :     }
     108        2739 :     return 0;
     109             : }
     110             : 
     111             : /**
     112             :  * Decode macroblock information.
     113             :  */
     114       68640 : static int rv30_decode_mb_info(RV34DecContext *r)
     115             : {
     116             :     static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
     117             :     static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
     118       68640 :     MpegEncContext *s = &r->s;
     119       68640 :     GetBitContext *gb = &s->gb;
     120       68640 :     unsigned code = get_interleaved_ue_golomb(gb);
     121             : 
     122       68640 :     if (code > 11) {
     123           0 :         av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
     124           0 :         return -1;
     125             :     }
     126       68640 :     if(code > 5){
     127           0 :         av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
     128           0 :         code -= 6;
     129             :     }
     130       68640 :     if(s->pict_type != AV_PICTURE_TYPE_B)
     131       15180 :         return rv30_p_types[code];
     132             :     else
     133       53460 :         return rv30_b_types[code];
     134             : }
     135             : 
     136     1048204 : static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
     137             :                                          const int stride, const int lim)
     138             : {
     139     1048204 :     const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
     140             :     int i, diff;
     141             : 
     142     5241020 :     for(i = 0; i < 4; i++){
     143     4192816 :         diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
     144     4192816 :         diff = av_clip(diff, -lim, lim);
     145     4192816 :         src[-1*step] = cm[src[-1*step] + diff];
     146     4192816 :         src[ 0*step] = cm[src[ 0*step] - diff];
     147     4192816 :         src += stride;
     148             :     }
     149     1048204 : }
     150             : 
     151        3308 : static void rv30_loop_filter(RV34DecContext *r, int row)
     152             : {
     153        3308 :     MpegEncContext *s = &r->s;
     154             :     int mb_pos, mb_x;
     155             :     int i, j, k;
     156             :     uint8_t *Y, *C;
     157        3308 :     int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
     158             : 
     159        3308 :     mb_pos = row * s->mb_stride;
     160       75988 :     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
     161       72680 :         int mbtype = s->current_picture_ptr->mb_type[mb_pos];
     162       72680 :         if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
     163        9106 :             r->deblock_coefs[mb_pos] = 0xFFFF;
     164       72680 :         if(IS_INTRA(mbtype))
     165        9106 :             r->cbp_chroma[mb_pos] = 0xFF;
     166             :     }
     167             : 
     168             :     /* all vertical edges are filtered first
     169             :      * and horizontal edges are filtered on the next iteration
     170             :      */
     171        3308 :     mb_pos = row * s->mb_stride;
     172       75988 :     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
     173       72680 :         cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
     174       72680 :         if(mb_x)
     175       69372 :             left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
     176      363400 :         for(j = 0; j < 16; j += 4){
     177      290720 :             Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
     178     1440368 :             for(i = !mb_x; i < 4; i++, Y += 4){
     179     1149648 :                 int ij = i + j;
     180     1149648 :                 loc_lim = 0;
     181     1149648 :                 if(r->deblock_coefs[mb_pos] & (1 << ij))
     182      351712 :                     loc_lim = cur_lim;
     183      797936 :                 else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
     184       14120 :                     loc_lim = left_lim;
     185      783816 :                 else if( i && r->deblock_coefs[mb_pos]     & (1 << (ij - 1)))
     186       38450 :                     loc_lim = cur_lim;
     187     1149648 :                 if(loc_lim)
     188      373358 :                     rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
     189             :             }
     190             :         }
     191      218040 :         for(k = 0; k < 2; k++){
     192      145360 :             int cur_cbp, left_cbp = 0;
     193      145360 :             cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
     194      145360 :             if(mb_x)
     195      138744 :                 left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
     196      436080 :             for(j = 0; j < 8; j += 4){
     197      290720 :                 C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
     198      858928 :                 for(i = !mb_x; i < 2; i++, C += 4){
     199      568208 :                     int ij = i + (j >> 1);
     200      568208 :                     loc_lim = 0;
     201      568208 :                     if (cur_cbp & (1 << ij))
     202      132602 :                         loc_lim = cur_lim;
     203      435606 :                     else if(!i && left_cbp & (1 << (ij + 1)))
     204       24668 :                         loc_lim = left_lim;
     205      410938 :                     else if( i && cur_cbp  & (1 << (ij - 1)))
     206       16738 :                         loc_lim = cur_lim;
     207      568208 :                     if(loc_lim)
     208      143764 :                         rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
     209             :                 }
     210             :             }
     211             :         }
     212             :     }
     213        3308 :     mb_pos = row * s->mb_stride;
     214       75988 :     for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
     215       72680 :         cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
     216       72680 :         if(row)
     217       67830 :             top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
     218      358550 :         for(j = 4*!row; j < 16; j += 4){
     219      285870 :             Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
     220     1429350 :             for(i = 0; i < 4; i++, Y += 4){
     221     1143480 :                 int ij = i + j;
     222     1143480 :                 loc_lim = 0;
     223     1143480 :                 if(r->deblock_coefs[mb_pos] & (1 << ij))
     224      350204 :                     loc_lim = cur_lim;
     225      793276 :                 else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
     226       15928 :                     loc_lim = top_lim;
     227      777348 :                 else if( j && r->deblock_coefs[mb_pos]                & (1 << (ij - 4)))
     228       45866 :                     loc_lim = cur_lim;
     229     1143480 :                 if(loc_lim)
     230      381230 :                     rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
     231             :             }
     232             :         }
     233      218040 :         for(k = 0; k < 2; k++){
     234      145360 :             int cur_cbp, top_cbp = 0;
     235      145360 :             cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
     236      145360 :             if(row)
     237      135660 :                 top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
     238      426380 :             for(j = 4*!row; j < 8; j += 4){
     239      281020 :                 C = s->current_picture_ptr->f->data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
     240      843060 :                 for(i = 0; i < 2; i++, C += 4){
     241      562040 :                     int ij = i + (j >> 1);
     242      562040 :                     loc_lim = 0;
     243      562040 :                     if (r->cbp_chroma[mb_pos] & (1 << ij))
     244      129332 :                         loc_lim = cur_lim;
     245      432708 :                     else if(!j && top_cbp & (1 << (ij + 2)))
     246       28486 :                         loc_lim = top_lim;
     247      404222 :                     else if( j && cur_cbp & (1 << (ij - 2)))
     248       22304 :                         loc_lim = cur_lim;
     249      562040 :                     if(loc_lim)
     250      149852 :                         rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
     251             :                 }
     252             :             }
     253             :         }
     254             :     }
     255        3308 : }
     256             : 
     257             : /**
     258             :  * Initialize decoder.
     259             :  */
     260           5 : static av_cold int rv30_decode_init(AVCodecContext *avctx)
     261             : {
     262           5 :     RV34DecContext *r = avctx->priv_data;
     263             :     int ret;
     264             : 
     265           5 :     r->orig_width  = avctx->coded_width;
     266           5 :     r->orig_height = avctx->coded_height;
     267             : 
     268           5 :     if (avctx->extradata_size < 2) {
     269           0 :         av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
     270           0 :         return AVERROR(EINVAL);
     271             :     }
     272           5 :     r->rv30 = 1;
     273           5 :     if ((ret = ff_rv34_decode_init(avctx)) < 0)
     274           0 :         return ret;
     275             : 
     276           5 :     r->max_rpr = avctx->extradata[1] & 7;
     277           5 :     if(avctx->extradata_size < 2*r->max_rpr + 8){
     278           0 :         av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
     279           0 :                2*r->max_rpr + 8, avctx->extradata_size);
     280             :     }
     281             : 
     282           5 :     r->parse_slice_header = rv30_parse_slice_header;
     283           5 :     r->decode_intra_types = rv30_decode_intra_types;
     284           5 :     r->decode_mb_info     = rv30_decode_mb_info;
     285           5 :     r->loop_filter        = rv30_loop_filter;
     286           5 :     r->luma_dc_quant_i = rv30_luma_dc_quant;
     287           5 :     r->luma_dc_quant_p = rv30_luma_dc_quant;
     288           5 :     return 0;
     289             : }
     290             : 
     291             : AVCodec ff_rv30_decoder = {
     292             :     .name                  = "rv30",
     293             :     .long_name             = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
     294             :     .type                  = AVMEDIA_TYPE_VIDEO,
     295             :     .id                    = AV_CODEC_ID_RV30,
     296             :     .priv_data_size        = sizeof(RV34DecContext),
     297             :     .init                  = rv30_decode_init,
     298             :     .close                 = ff_rv34_decode_end,
     299             :     .decode                = ff_rv34_decode_frame,
     300             :     .capabilities          = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
     301             :                              AV_CODEC_CAP_FRAME_THREADS,
     302             :     .flush                 = ff_mpeg_flush,
     303             :     .pix_fmts              = (const enum AVPixelFormat[]) {
     304             :         AV_PIX_FMT_YUV420P,
     305             :         AV_PIX_FMT_NONE
     306             :     },
     307             :     .init_thread_copy      = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
     308             :     .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
     309             : };

Generated by: LCOV version 1.13