LCOV - code coverage report
Current view: top level - libavformat - img2_alias_pix.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 21 22 95.5 %
Date: 2017-12-10 21:22:29 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Alias PIX image demuxer
       3             :  * Copyright (c) 2014 Michael Niedermayer
       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             : #include "img2.h"
      23             : #include "libavcodec/bytestream.h"
      24             : 
      25        6158 : static int alias_pix_read_probe(AVProbeData *p)
      26             : {
      27        6158 :     const uint8_t *b = p->buf;
      28        6158 :     const uint8_t *end = b + p->buf_size;
      29        6158 :     int width  = bytestream_get_be16(&b);
      30        6158 :     int height = bytestream_get_be16(&b);
      31        6158 :     av_unused int ox = bytestream_get_be16(&b);
      32        6158 :     av_unused int oy = bytestream_get_be16(&b);
      33        6158 :     int bpp    = bytestream_get_be16(&b);
      34             :     int x, y;
      35             : 
      36        6158 :     if (!width || !height)
      37        1197 :         return 0;
      38             : 
      39        4961 :     if (bpp != 24 && bpp != 8)
      40        4957 :         return 0;
      41             : 
      42           8 :     for (y=0; y<2 && y<height; y++) {
      43         725 :         for (x=0; x<width; ) {
      44         715 :             int count = *b++;
      45         715 :             if (count == 0 || x + count > width)
      46           2 :                 return 0;
      47         713 :             if (b > end)
      48           0 :                 return AVPROBE_SCORE_MAX / 8;
      49         713 :             b += bpp / 8;
      50         713 :             x += count;
      51             :         }
      52             :     }
      53             : 
      54           2 :     return AVPROBE_SCORE_EXTENSION + 1;
      55             : }
      56             : 
      57             : static const AVClass image2_alias_pix_class = {
      58             :     .class_name = "alias_pix demuxer",
      59             :     .item_name  = av_default_item_name,
      60             :     .option     = ff_img_options,
      61             :     .version    = LIBAVUTIL_VERSION_INT,
      62             : };
      63             : 
      64             : AVInputFormat ff_image2_alias_pix_demuxer = {
      65             :     .name           = "alias_pix",
      66             :     .long_name      = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
      67             :     .priv_data_size = sizeof(VideoDemuxData),
      68             :     .read_probe     = alias_pix_read_probe,
      69             :     .read_header    = ff_img_read_header,
      70             :     .read_packet    = ff_img_read_packet,
      71             :     .raw_codec_id   = AV_CODEC_ID_ALIAS_PIX,
      72             :     .priv_class     = &image2_alias_pix_class,
      73             : };

Generated by: LCOV version 1.13