libextractor

GNU libextractor
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test_previewopus.c (2937B)

      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_previewopus.c
     22  * @brief testcase for the previewopus plugin
     23  * @author Bruno Cabral
     24  * @author Christian Grothoff
     25  *
     26  * What comes out is an Opus stream, and comparing that byte for byte
     27  * would mean pinning down a particular version of libopus.  So we check
     28  * that it is a well formed Ogg stream carrying the OpusHead
     29  * identification header of RFC 7845, and that it is neither empty nor
     30  * absurdly large.
     31  */
     32 #include "platform.h"
     33 #include "test_lib.h"
     34 #include "test_media_lib.h"
     35 
     36 
     37 /**
     38  * Check that the preview is a plausible Ogg Opus stream.
     39  *
     40  * @param data the preview the plugin produced
     41  * @param data_len number of bytes in @a data
     42  * @return non-zero if the preview looks right
     43  */
     44 static int
     45 validate_opus (const void *data,
     46                size_t data_len)
     47 {
     48   if (data_len < 1024)
     49   {
     50     fprintf (stderr,
     51              "Audio preview of %u bytes is too short to be 15s of Opus\n",
     52              (unsigned int) data_len);
     53     return 0;
     54   }
     55   return TEST_media_is_ogg_opus (data,
     56                                  data_len);
     57 }
     58 
     59 
     60 /**
     61  * Main function for the previewopus testcase.
     62  *
     63  * @param argc number of arguments (ignored)
     64  * @param argv arguments (ignored)
     65  * @return 0 on success
     66  */
     67 int
     68 main (int argc, char *argv[])
     69 {
     70   struct SolutionData previewopus_sol[] = {
     71     {
     72       EXTRACTOR_METATYPE_AUDIO_PREVIEW,
     73       EXTRACTOR_METAFORMAT_BINARY,
     74       "audio/ogg",
     75       "OggS",
     76       strlen ("OggS"),
     77       0,
     78       0,
     79       &validate_opus
     80     },
     81     { 0, 0, NULL, NULL, 0, -1 }
     82   };
     83   struct SolutionData previewopus_video_sol[] = {
     84     {
     85       EXTRACTOR_METATYPE_AUDIO_PREVIEW,
     86       EXTRACTOR_METAFORMAT_BINARY,
     87       "audio/ogg",
     88       "OggS",
     89       strlen ("OggS"),
     90       0,
     91       0,
     92       &validate_opus
     93     },
     94     { 0, 0, NULL, NULL, 0, -1 }
     95   };
     96   struct ProblemSet ps[] = {
     97     { "testdata/preview_tone.ogg",
     98       previewopus_sol },
     99     { "testdata/preview_tone.ogv",
    100       previewopus_video_sol },
    101     { NULL, NULL }
    102   };
    103 
    104   return ET_main ("previewopus",
    105                   ps);
    106 }
    107 
    108 
    109 /* end of test_previewopus.c */