LCOV - code coverage report
Current view: top level - libavcodec - h263.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 184 195 94.4 %
Date: 2017-12-13 10:57:33 Functions: 5 5 100.0 %

          Line data    Source code
       1             : /*
       2             :  * H.263/MPEG-4 backend for encoder and decoder
       3             :  * Copyright (c) 2000,2001 Fabrice Bellard
       4             :  * H.263+ support.
       5             :  * Copyright (c) 2001 Juan J. Sierralta P
       6             :  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
       7             :  *
       8             :  * This file is part of FFmpeg.
       9             :  *
      10             :  * FFmpeg is free software; you can redistribute it and/or
      11             :  * modify it under the terms of the GNU Lesser General Public
      12             :  * License as published by the Free Software Foundation; either
      13             :  * version 2.1 of the License, or (at your option) any later version.
      14             :  *
      15             :  * FFmpeg is distributed in the hope that it will be useful,
      16             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      17             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      18             :  * Lesser General Public License for more details.
      19             :  *
      20             :  * You should have received a copy of the GNU Lesser General Public
      21             :  * License along with FFmpeg; if not, write to the Free Software
      22             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      23             :  */
      24             : 
      25             : /**
      26             :  * @file
      27             :  * H.263/MPEG-4 codec.
      28             :  */
      29             : 
      30             : #include <limits.h>
      31             : 
      32             : #include "avcodec.h"
      33             : #include "mpegvideo.h"
      34             : #include "h263.h"
      35             : #include "h263data.h"
      36             : #include "mathops.h"
      37             : #include "mpegutils.h"
      38             : #include "flv.h"
      39             : #include "mpeg4video.h"
      40             : 
      41             : 
      42     3349201 : void ff_h263_update_motion_val(MpegEncContext * s){
      43     3349201 :     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
      44             :                //FIXME a lot of that is only needed for !low_delay
      45     3349201 :     const int wrap = s->b8_stride;
      46     3349201 :     const int xy = s->block_index[0];
      47             : 
      48     3349201 :     s->current_picture.mbskip_table[mb_xy] = s->mb_skipped;
      49             : 
      50     3349201 :     if(s->mv_type != MV_TYPE_8X8){
      51             :         int motion_x, motion_y;
      52     3145870 :         if (s->mb_intra) {
      53      493300 :             motion_x = 0;
      54      493300 :             motion_y = 0;
      55     2652570 :         } else if (s->mv_type == MV_TYPE_16X16) {
      56     2652570 :             motion_x = s->mv[0][0][0];
      57     2652570 :             motion_y = s->mv[0][0][1];
      58             :         } else /*if (s->mv_type == MV_TYPE_FIELD)*/ {
      59             :             int i;
      60           0 :             motion_x = s->mv[0][0][0] + s->mv[0][1][0];
      61           0 :             motion_y = s->mv[0][0][1] + s->mv[0][1][1];
      62           0 :             motion_x = (motion_x>>1) | (motion_x&1);
      63           0 :             for(i=0; i<2; i++){
      64           0 :                 s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0];
      65           0 :                 s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1];
      66             :             }
      67           0 :             s->current_picture.ref_index[0][4*mb_xy    ] =
      68           0 :             s->current_picture.ref_index[0][4*mb_xy + 1] = s->field_select[0][0];
      69           0 :             s->current_picture.ref_index[0][4*mb_xy + 2] =
      70           0 :             s->current_picture.ref_index[0][4*mb_xy + 3] = s->field_select[0][1];
      71             :         }
      72             : 
      73             :         /* no update if 8X8 because it has been done during parsing */
      74     3145870 :         s->current_picture.motion_val[0][xy][0]            = motion_x;
      75     3145870 :         s->current_picture.motion_val[0][xy][1]            = motion_y;
      76     3145870 :         s->current_picture.motion_val[0][xy + 1][0]        = motion_x;
      77     3145870 :         s->current_picture.motion_val[0][xy + 1][1]        = motion_y;
      78     3145870 :         s->current_picture.motion_val[0][xy + wrap][0]     = motion_x;
      79     3145870 :         s->current_picture.motion_val[0][xy + wrap][1]     = motion_y;
      80     3145870 :         s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x;
      81     3145870 :         s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y;
      82             :     }
      83             : 
      84     3349201 :     if(s->encoding){ //FIXME encoding MUST be cleaned up
      85     1299795 :         if (s->mv_type == MV_TYPE_8X8)
      86       79330 :             s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_8x8;
      87     1220465 :         else if(s->mb_intra)
      88      208843 :             s->current_picture.mb_type[mb_xy] = MB_TYPE_INTRA;
      89             :         else
      90     1011622 :             s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_16x16;
      91             :     }
      92     3349201 : }
      93             : 
      94       82098 : int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
      95             : {
      96             :     int x, y, wrap, a, c, pred_dc;
      97             :     int16_t *dc_val;
      98             : 
      99             :     /* find prediction */
     100       82098 :     if (n < 4) {
     101       54732 :         x = 2 * s->mb_x + (n & 1);
     102       54732 :         y = 2 * s->mb_y + ((n & 2) >> 1);
     103       54732 :         wrap = s->b8_stride;
     104       54732 :         dc_val = s->dc_val[0];
     105             :     } else {
     106       27366 :         x = s->mb_x;
     107       27366 :         y = s->mb_y;
     108       27366 :         wrap = s->mb_stride;
     109       27366 :         dc_val = s->dc_val[n - 4 + 1];
     110             :     }
     111             :     /* B C
     112             :      * A X
     113             :      */
     114       82098 :     a = dc_val[(x - 1) + (y) * wrap];
     115       82098 :     c = dc_val[(x) + (y - 1) * wrap];
     116             : 
     117             :     /* No prediction outside GOB boundary */
     118       82098 :     if(s->first_slice_line && n!=3){
     119       40365 :         if(n!=2) c= 1024;
     120       40365 :         if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024;
     121             :     }
     122             :     /* just DC prediction */
     123       82098 :     if (a != 1024 && c != 1024)
     124       47737 :         pred_dc = (a + c) >> 1;
     125       34361 :     else if (a != 1024)
     126       29145 :         pred_dc = a;
     127             :     else
     128        5216 :         pred_dc = c;
     129             : 
     130             :     /* we assume pred is positive */
     131       82098 :     *dc_val_ptr = &dc_val[x + y * wrap];
     132       82098 :     return pred_dc;
     133             : }
     134             : 
     135      260100 : void ff_h263_loop_filter(MpegEncContext * s){
     136             :     int qp_c;
     137      260100 :     const int linesize  = s->linesize;
     138      260100 :     const int uvlinesize= s->uvlinesize;
     139      260100 :     const int xy = s->mb_y * s->mb_stride + s->mb_x;
     140      260100 :     uint8_t *dest_y = s->dest[0];
     141      260100 :     uint8_t *dest_cb= s->dest[1];
     142      260100 :     uint8_t *dest_cr= s->dest[2];
     143             : 
     144             :     /*
     145             :        Diag Top
     146             :        Left Center
     147             :     */
     148      260100 :     if (!IS_SKIP(s->current_picture.mb_type[xy])) {
     149      186447 :         qp_c= s->qscale;
     150      186447 :         s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize,     linesize, qp_c);
     151      186447 :         s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
     152             :     }else
     153       73653 :         qp_c= 0;
     154             : 
     155      260100 :     if(s->mb_y){
     156             :         int qp_dt, qp_tt, qp_tc;
     157             : 
     158      244080 :         if (IS_SKIP(s->current_picture.mb_type[xy - s->mb_stride]))
     159       65553 :             qp_tt=0;
     160             :         else
     161      178527 :             qp_tt = s->current_picture.qscale_table[xy - s->mb_stride];
     162             : 
     163      244080 :         if(qp_c)
     164      178645 :             qp_tc= qp_c;
     165             :         else
     166       65435 :             qp_tc= qp_tt;
     167             : 
     168      244080 :         if(qp_tc){
     169      196681 :             const int chroma_qp= s->chroma_qscale_table[qp_tc];
     170      196681 :             s->h263dsp.h263_v_loop_filter(dest_y,     linesize, qp_tc);
     171      196681 :             s->h263dsp.h263_v_loop_filter(dest_y + 8, linesize, qp_tc);
     172             : 
     173      196681 :             s->h263dsp.h263_v_loop_filter(dest_cb, uvlinesize, chroma_qp);
     174      196681 :             s->h263dsp.h263_v_loop_filter(dest_cr, uvlinesize, chroma_qp);
     175             :         }
     176             : 
     177      244080 :         if(qp_tt)
     178      178527 :             s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize + 8, linesize, qp_tt);
     179             : 
     180      244080 :         if(s->mb_x){
     181      232386 :             if (qp_tt || IS_SKIP(s->current_picture.mb_type[xy - 1 - s->mb_stride]))
     182      217435 :                 qp_dt= qp_tt;
     183             :             else
     184       14951 :                 qp_dt = s->current_picture.qscale_table[xy - 1 - s->mb_stride];
     185             : 
     186      232386 :             if(qp_dt){
     187      185782 :                 const int chroma_qp= s->chroma_qscale_table[qp_dt];
     188      185782 :                 s->h263dsp.h263_h_loop_filter(dest_y  - 8 * linesize,   linesize,   qp_dt);
     189      185782 :                 s->h263dsp.h263_h_loop_filter(dest_cb - 8 * uvlinesize, uvlinesize, chroma_qp);
     190      185782 :                 s->h263dsp.h263_h_loop_filter(dest_cr - 8 * uvlinesize, uvlinesize, chroma_qp);
     191             :             }
     192             :         }
     193             :     }
     194             : 
     195      260100 :     if(qp_c){
     196      186447 :         s->h263dsp.h263_h_loop_filter(dest_y + 8, linesize, qp_c);
     197      186447 :         if(s->mb_y + 1 == s->mb_height)
     198        7920 :             s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
     199             :     }
     200             : 
     201      260100 :     if(s->mb_x){
     202             :         int qp_lc;
     203      247635 :         if (qp_c || IS_SKIP(s->current_picture.mb_type[xy - 1]))
     204      232441 :             qp_lc= qp_c;
     205             :         else
     206       15194 :             qp_lc = s->current_picture.qscale_table[xy - 1];
     207             : 
     208      247635 :         if(qp_lc){
     209      193584 :             s->h263dsp.h263_h_loop_filter(dest_y, linesize, qp_lc);
     210      193584 :             if(s->mb_y + 1 == s->mb_height){
     211        7802 :                 const int chroma_qp= s->chroma_qscale_table[qp_lc];
     212        7802 :                 s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize, linesize, qp_lc);
     213        7802 :                 s->h263dsp.h263_h_loop_filter(dest_cb, uvlinesize, chroma_qp);
     214        7802 :                 s->h263dsp.h263_h_loop_filter(dest_cr, uvlinesize, chroma_qp);
     215             :             }
     216             :         }
     217             :     }
     218      260100 : }
     219             : 
     220       91098 : void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n)
     221             : {
     222             :     int x, y, wrap, a, c, pred_dc, scale, i;
     223             :     int16_t *dc_val, *ac_val, *ac_val1;
     224             : 
     225             :     /* find prediction */
     226       91098 :     if (n < 4) {
     227       60732 :         x = 2 * s->mb_x + (n & 1);
     228       60732 :         y = 2 * s->mb_y + (n>> 1);
     229       60732 :         wrap = s->b8_stride;
     230       60732 :         dc_val = s->dc_val[0];
     231       60732 :         ac_val = s->ac_val[0][0];
     232       60732 :         scale = s->y_dc_scale;
     233             :     } else {
     234       30366 :         x = s->mb_x;
     235       30366 :         y = s->mb_y;
     236       30366 :         wrap = s->mb_stride;
     237       30366 :         dc_val = s->dc_val[n - 4 + 1];
     238       30366 :         ac_val = s->ac_val[n - 4 + 1][0];
     239       30366 :         scale = s->c_dc_scale;
     240             :     }
     241             : 
     242       91098 :     ac_val += ((y) * wrap + (x)) * 16;
     243       91098 :     ac_val1 = ac_val;
     244             : 
     245             :     /* B C
     246             :      * A X
     247             :      */
     248       91098 :     a = dc_val[(x - 1) + (y) * wrap];
     249       91098 :     c = dc_val[(x) + (y - 1) * wrap];
     250             : 
     251             :     /* No prediction outside GOB boundary */
     252       91098 :     if(s->first_slice_line && n!=3){
     253       45145 :         if(n!=2) c= 1024;
     254       45145 :         if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024;
     255             :     }
     256             : 
     257       91098 :     if (s->ac_pred) {
     258        4434 :         pred_dc = 1024;
     259        4434 :         if (s->h263_aic_dir) {
     260             :             /* left prediction */
     261        1596 :             if (a != 1024) {
     262        1576 :                 ac_val -= 16;
     263       12608 :                 for(i=1;i<8;i++) {
     264       11032 :                     block[s->idsp.idct_permutation[i << 3]] += ac_val[i];
     265             :                 }
     266        1576 :                 pred_dc = a;
     267             :             }
     268             :         } else {
     269             :             /* top prediction */
     270        2838 :             if (c != 1024) {
     271        1910 :                 ac_val -= 16 * wrap;
     272       15280 :                 for(i=1;i<8;i++) {
     273       13370 :                     block[s->idsp.idct_permutation[i]] += ac_val[i + 8];
     274             :                 }
     275        1910 :                 pred_dc = c;
     276             :             }
     277             :         }
     278             :     } else {
     279             :         /* just DC prediction */
     280       86664 :         if (a != 1024 && c != 1024)
     281       50003 :             pred_dc = (a + c) >> 1;
     282       36661 :         else if (a != 1024)
     283       31137 :             pred_dc = a;
     284             :         else
     285        5524 :             pred_dc = c;
     286             :     }
     287             : 
     288             :     /* we assume pred is positive */
     289       91098 :     block[0]=block[0]*scale + pred_dc;
     290             : 
     291       91098 :     if (block[0] < 0)
     292           0 :         block[0] = 0;
     293             :     else
     294       91098 :         block[0] |= 1;
     295             : 
     296             :     /* Update AC/DC tables */
     297       91098 :     dc_val[(x) + (y) * wrap] = block[0];
     298             : 
     299             :     /* left copy */
     300      728784 :     for(i=1;i<8;i++)
     301      637686 :         ac_val1[i]     = block[s->idsp.idct_permutation[i << 3]];
     302             :     /* top copy */
     303      728784 :     for(i=1;i<8;i++)
     304      637686 :         ac_val1[8 + i] = block[s->idsp.idct_permutation[i]];
     305       91098 : }
     306             : 
     307     3910395 : int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
     308             :                              int *px, int *py)
     309             : {
     310             :     int wrap;
     311             :     int16_t *A, *B, *C, (*mot_val)[2];
     312             :     static const int off[4]= {2, 1, 1, -1};
     313             : 
     314     3910395 :     wrap = s->b8_stride;
     315     3910395 :     mot_val = s->current_picture.motion_val[dir] + s->block_index[block];
     316             : 
     317     3910395 :     A = mot_val[ - 1];
     318             :     /* special case for first (slice) line */
     319     3910395 :     if (s->first_slice_line && block<3) {
     320             :         // we can't just change some MVs to simulate that as we need them for the B-frames (and ME)
     321             :         // and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
     322      778738 :         if(block==0){ //most common case
     323      313611 :             if(s->mb_x  == s->resync_mb_x){ //rare
     324       15181 :                 *px= *py = 0;
     325      298430 :             }else if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare
     326        1859 :                 C = mot_val[off[block] - wrap];
     327        3718 :                 if(s->mb_x==0){
     328         118 :                     *px = C[0];
     329         118 :                     *py = C[1];
     330             :                 }else{
     331        1741 :                     *px = mid_pred(A[0], 0, C[0]);
     332        1741 :                     *py = mid_pred(A[1], 0, C[1]);
     333             :                 }
     334             :             }else{
     335      296571 :                 *px = A[0];
     336      296571 :                 *py = A[1];
     337             :             }
     338       75758 :         }else if(block==1){
     339       37879 :             if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare
     340         730 :                 C = mot_val[off[block] - wrap];
     341         730 :                 *px = mid_pred(A[0], 0, C[0]);
     342         730 :                 *py = mid_pred(A[1], 0, C[1]);
     343             :             }else{
     344       37149 :                 *px = A[0];
     345       37149 :                 *py = A[1];
     346             :             }
     347             :         }else{ /* block==2*/
     348       37879 :             B = mot_val[ - wrap];
     349       37879 :             C = mot_val[off[block] - wrap];
     350       37879 :             if(s->mb_x == s->resync_mb_x) //rare
     351        2170 :                 A[0]=A[1]=0;
     352             : 
     353       37879 :             *px = mid_pred(A[0], B[0], C[0]);
     354       37879 :             *py = mid_pred(A[1], B[1], C[1]);
     355             :         }
     356             :     } else {
     357     3521026 :         B = mot_val[ - wrap];
     358     3521026 :         C = mot_val[off[block] - wrap];
     359     3521026 :         *px = mid_pred(A[0], B[0], C[0]);
     360     3521026 :         *py = mid_pred(A[1], B[1], C[1]);
     361             :     }
     362     3910395 :     return *mot_val;
     363             : }

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