release/src/router/minidlna/tagutils/tagutils-flc.c

   1 //=========================================================================
   2 // FILENAME     : tagutils-flc.c
   3 // DESCRIPTION  : FLAC metadata reader
   4 //=========================================================================
   5 // Copyright (c) 2008- NETGEAR, Inc. All Rights Reserved.
   6 //=========================================================================
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 static int
  24 _get_flctags(char *filename, struct song_metadata *psong)
  25 {
  26         FLAC__Metadata_SimpleIterator *iterator = 0;
  27         FLAC__StreamMetadata *block;
  28         unsigned int sec, ms;
  29         int i;
  30         int err = 0;
  31
  32         if(!(iterator = FLAC__metadata_simple_iterator_new()))
  33         {
  34                 DPRINTF(E_FATAL, L_SCANNER, "Out of memory while FLAC__metadata_simple_iterator_new()\n");
  35                 return -1;
  36         }
  37
  38         if(!FLAC__metadata_simple_iterator_init(iterator, filename, true, true))
  39         {
  40                 DPRINTF(E_ERROR, L_SCANNER, "Cannot extract tag from %s [%s]\n", filename,
  41                         FLAC__Metadata_SimpleIteratorStatusString[FLAC__metadata_simple_iterator_status(iterator)]);
  42                 goto _exit;
  43         }
  44
  45         do {
  46                 if(!(block = FLAC__metadata_simple_iterator_get_block(iterator)))
  47                 {
  48                         DPRINTF(E_ERROR, L_SCANNER, "Cannot extract tag from %s\n", filename);
  49                         err = -1;
  50                         goto _exit;
  51                 }
  52
  53                 switch(block->type)
  54                 {
  55                 case FLAC__METADATA_TYPE_STREAMINFO:
  56                         if (!block->data.stream_info.sample_rate)
  57                                 break; /* Info is crap, avoid div-by-zero. */
  58                         sec = (unsigned int)(block->data.stream_info.total_samples /
  59                                              block->data.stream_info.sample_rate);
  60                         ms = (unsigned int)(((block->data.stream_info.total_samples %
  61                                               block->data.stream_info.sample_rate) * 1000) /
  62                                               block->data.stream_info.sample_rate);
  63                         if ((sec == 0) && (ms == 0))
  64                                 break; /* Info is crap, escape div-by-zero. */
  65                         psong->song_length = (sec * 1000) + ms;
  66                         psong->bitrate = (((uint64_t)(psong->file_size) * 1000) / (psong->song_length / 8));
  67                         psong->samplerate = block->data.stream_info.sample_rate;
  68                         psong->channels = block->data.stream_info.channels;
  69                         break;
  70
  71                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
  72                         for(i = 0; i < block->data.vorbis_comment.num_comments; i++)
  73                         {
  74                                 vc_scan(psong,
  75                                         (char*)block->data.vorbis_comment.comments[i].entry,
  76                                         block->data.vorbis_comment.comments[i].length);
  77                         }
  78                         break;
  79 #if FLAC_API_VERSION_CURRENT >= 10
  80                 case FLAC__METADATA_TYPE_PICTURE:
  81                         if (psong->image) {
  82                                 DPRINTF(E_MAXDEBUG, L_SCANNER, "Ignoring additional image [%s]\n", filename);
  83                                 break;
  84                         }
  85                         psong->image_size = block->data.picture.data_length;
  86                         if((psong->image = malloc(psong->image_size)))
  87                                 memcpy(psong->image, block->data.picture.data, psong->image_size);
  88                         else
  89                                 DPRINTF(E_ERROR, L_SCANNER, "Out of memory [%s]\n", filename);
  90                         break;
  91 #endif
  92                 default:
  93                         break;
  94                 }
  95                 FLAC__metadata_object_delete(block);
  96         }
  97         while(FLAC__metadata_simple_iterator_next(iterator));
  98
  99  _exit:
 100         if(iterator)
 101                 FLAC__metadata_simple_iterator_delete(iterator);
 102
 103         return err;
 104 }
 105
 106 static int
 107 _get_flcfileinfo(char *filename, struct song_metadata *psong)
 108 {
 109         psong->lossless = 1;
 110         psong->vbr_scale = 1;
 111
 112         return 0;
 113 }