libextractor

GNU libextractor
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test_thumbnailffmpeg.c (3259B)

      1 /*
      2      This file is part of libextractor.
      3      Copyright (C) 2013, 2026 Vidyut Samanta and Christian Grothoff
      4 
      5      libextractor is free software; you can redistribute it and/or modify
      6      it under the terms of the GNU General Public License as published
      7      by the Free Software Foundation; either version 3, or (at your
      8      option) any later version.
      9 
     10      libextractor is distributed in the hope that it will be useful, but
     11      WITHOUT ANY WARRANTY; without even the implied warranty of
     12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13      General Public License for more details.
     14 
     15      You should have received a copy of the GNU General Public License
     16      along with libextractor; see the file COPYING.  If not, write to the
     17      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18      Boston, MA 02110-1301, USA.
     19 */
     20 /**
     21  * @file plugins/test_thumbnailffmpeg.c
     22  * @brief testcase for the thumbnailffmpeg plugin
     23  * @author Christian Grothoff
     24  *
     25  * The encoder's output depends on the FFmpeg version, so the JPEG can
     26  * only be checked for its magic number.  The PNG round, on the other
     27  * hand, is decoded: testdata/thumbnail_pattern.ogv is black for the
     28  * first 20 seconds and red afterwards, so the colour of the thumbnail
     29  * says whether the plugin really sampled where it claims to.
     30  */
     31 #include "platform.h"
     32 #include "test_lib.h"
     33 #include "test_media_lib.h"
     34 
     35 
     36 /**
     37  * Check that the thumbnail was taken from the red part of the video.
     38  *
     39  * @param data the PNG the plugin produced
     40  * @param data_len number of bytes in @a data
     41  * @return non-zero if the thumbnail looks right
     42  */
     43 static int
     44 validate_red (const void *data,
     45               size_t data_len)
     46 {
     47   return TEST_media_png_center_is (data,
     48                                    data_len,
     49                                    0xFE,
     50                                    0x00,
     51                                    0x00);
     52 }
     53 
     54 
     55 /**
     56  * Main function for the thumbnailffmpeg testcase.
     57  *
     58  * @param argc number of arguments (ignored)
     59  * @param argv arguments (ignored)
     60  * @return 0 on success
     61  */
     62 int
     63 main (int argc, char *argv[])
     64 {
     65   uint8_t jpeg_magic[] = { 0xFF, 0xD8, 0xFF };
     66   uint8_t png_magic[] = { 137, 'P', 'N', 'G', '\r', '\n', 26, '\n' };
     67   struct SolutionData thumbnail_jpeg_sol[] = {
     68     {
     69       EXTRACTOR_METATYPE_THUMBNAIL,
     70       EXTRACTOR_METAFORMAT_BINARY,
     71       "image/jpeg",
     72       (const char *) jpeg_magic,
     73       sizeof (jpeg_magic),
     74       0
     75     },
     76     { 0, 0, NULL, NULL, 0, -1 }
     77   };
     78   struct SolutionData thumbnail_png_sol[] = {
     79     {
     80       EXTRACTOR_METATYPE_THUMBNAIL,
     81       EXTRACTOR_METAFORMAT_BINARY,
     82       "image/png",
     83       (const char *) png_magic,
     84       sizeof (png_magic),
     85       0,
     86       0,
     87       &validate_red
     88     },
     89     { 0, 0, NULL, NULL, 0, -1 }
     90   };
     91   struct ProblemSet ps_jpeg[] = {
     92     { "testdata/thumbnail_pattern.ogv",
     93       thumbnail_jpeg_sol },
     94     { NULL, NULL }
     95   };
     96   struct ProblemSet ps_png[] = {
     97     { "testdata/thumbnail_pattern.ogv",
     98       thumbnail_png_sol },
     99     { NULL, NULL }
    100   };
    101   int ret;
    102 
    103   ret = ET_main ("thumbnailffmpeg",
    104                  ps_jpeg);
    105   if (0 != ret)
    106     return ret;
    107   return ET_main ("thumbnailffmpeg(format=png,size=32)",
    108                   ps_png);
    109 }
    110 
    111 
    112 /* end of test_thumbnailffmpeg.c */