LCOV - code coverage report
Current view: top level - src/libavfilter - bbox.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 28 0.0 %
Date: 2017-01-24 04:42:20 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2005 Robert Edele <yartrebo@earthlink.net>
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "bbox.h"
      22             : 
      23           0 : int ff_calculate_bounding_box(FFBoundingBox *bbox,
      24             :                               const uint8_t *data, int linesize, int w, int h,
      25             :                               int min_val)
      26             : {
      27             :     int x, y;
      28             :     int start_x;
      29             :     int start_y;
      30             :     int end_x;
      31             :     int end_y;
      32             :     const uint8_t *line;
      33             : 
      34             :     /* left bound */
      35           0 :     for (start_x = 0; start_x < w; start_x++)
      36           0 :         for (y = 0; y < h; y++)
      37           0 :             if ((data[y * linesize + start_x] > min_val))
      38           0 :                 goto outl;
      39             : outl:
      40           0 :     if (start_x == w) /* no points found */
      41           0 :         return 0;
      42             : 
      43             :     /* right bound */
      44           0 :     for (end_x = w - 1; end_x >= start_x; end_x--)
      45           0 :         for (y = 0; y < h; y++)
      46           0 :             if ((data[y * linesize + end_x] > min_val))
      47           0 :                 goto outr;
      48             : outr:
      49             : 
      50             :     /* top bound */
      51           0 :     line = data;
      52           0 :     for (start_y = 0; start_y < h; start_y++) {
      53           0 :         for (x = 0; x < w; x++)
      54           0 :             if (line[x] > min_val)
      55           0 :                 goto outt;
      56           0 :         line += linesize;
      57             :     }
      58             : outt:
      59             : 
      60             :     /* bottom bound */
      61           0 :     line = data + (h-1)*linesize;
      62           0 :     for (end_y = h - 1; end_y >= start_y; end_y--) {
      63           0 :         for (x = 0; x < w; x++)
      64           0 :             if (line[x] > min_val)
      65           0 :                 goto outb;
      66           0 :         line -= linesize;
      67             :     }
      68             : outb:
      69             : 
      70           0 :     bbox->x1 = start_x;
      71           0 :     bbox->y1 = start_y;
      72           0 :     bbox->x2 = end_x;
      73           0 :     bbox->y2 = end_y;
      74           0 :     return 1;
      75             : }

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