vorbis-tools-1.2.0/ogg123/vorbis_comments.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
   5  * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *
   6  * PLEASE READ THESE TERMS BEFORE DISTRIBUTING.                     *
   7  *                                                                  *
   8  * THE Ogg123 SOURCE CODE IS (C) COPYRIGHT 2000-2001                *
   9  * by Stan Seibert <volsung@xiph.org> AND OTHER CONTRIBUTORS        *
  10  * http://www.xiph.org/                                             *
  11  *                                                                  *
  12  ********************************************************************
  13
  14  last mod: $Id: vorbis_comments.c,v 1.3 2003/06/24 12:37:52 giles Exp $
  15
  16  ********************************************************************/
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <ctype.h>
  26 #include <ogg/ogg.h>
  27 #include <vorbis/codec.h>
  28 #include <vorbis/vorbisfile.h>
  29 #include "format.h"
  30 #include "utf8.h"
  31 #include "i18n.h"
  32
  33
  34 /* Vorbis comment keys that need special formatting. */
  35 struct {
  36   char *key;         /* includes the '=' for programming convenience */
  37   char *formatstr;   /* formatted output */
  38 } vorbis_comment_keys[] = {
  39   {"TRACKNUMBER=", N_("Track number:")},
  40   {"REPLAYGAIN_TRACK_GAIN=", N_("ReplayGain (Track):")},
  41   {"REPLAYGAIN_ALBUM_GAIN=", N_("ReplayGain (Album):")},
  42   {"REPLAYGAIN_TRACK_PEAK=", N_("ReplayGain Peak (Track):")},
  43   {"REPLAYGAIN_ALBUM_PEAK=", N_("ReplayGain Peak (Album):")},
  44   {"COPYRIGHT=", N_("Copyright")},
  45   {"=", N_("Comment:")},
  46   {NULL, N_("Comment:")}
  47 };
  48
  49
  50 char *lookup_comment_prettyprint (char *comment, int *offset)
  51 {
  52   int i, j;
  53   char *s;
  54
  55   /* Search for special-case formatting */
  56   for (i = 0; vorbis_comment_keys[i].key != NULL; i++) {
  57
  58     if ( !strncasecmp (vorbis_comment_keys[i].key, comment,
  59                        strlen(vorbis_comment_keys[i].key)) ) {
  60
  61       *offset = strlen(vorbis_comment_keys[i].key);
  62       s = malloc(strlen(vorbis_comment_keys[i].formatstr) + 1);
  63       if (s == NULL) {
  64         fprintf(stderr, _("Error: Out of memory.\n"));
  65         exit(1);
  66       };
  67       strcpy(s, vorbis_comment_keys[i].formatstr);
  68       return s;
  69     }
  70
  71   }
  72
  73   /* Use default formatting */
  74   j = strcspn(comment, "=");
  75   if (j) {
  76     *offset = j + 1;
  77     s = malloc(j + 2);
  78     if (s == NULL) {
  79       fprintf(stderr, _("Error: Out of memory.\n"));
  80       exit(1);
  81     };
  82     strncpy(s, comment, j);
  83     strcpy(s + j, ":");
  84
  85     /* Capitalize */
  86     s[0] = toupper(s[0]);
  87     for (i = 1; i < j; i++) {
  88       s[i] = tolower(s[i]);
  89     };
  90     return s;
  91   }
  92
  93   /* Unrecognized comment, use last format string */
  94   *offset = 0;
  95   s = malloc(strlen(vorbis_comment_keys[i].formatstr) + 1);
  96   if (s == NULL) {
  97     fprintf(stderr, _("Error: Out of memory.\n"));
  98     exit(1);
  99   };
 100   strcpy(s, vorbis_comment_keys[i].formatstr);
 101   return s;
 102 }
 103
 104 void print_vorbis_comment (char *comment, decoder_callbacks_t *cb,
 105                            void *callback_arg)
 106 {
 107   char *comment_prettyprint;
 108   char *decoded_value;
 109   int offset;
 110
 111   if (cb == NULL || cb->printf_metadata == NULL)
 112     return;
 113
 114   comment_prettyprint = lookup_comment_prettyprint(comment, &offset);
 115
 116   if (utf8_decode(comment + offset, &decoded_value) >= 0) {
 117     cb->printf_metadata(callback_arg, 1, "%s %s", comment_prettyprint,
 118                         decoded_value);
 119     free(decoded_value);
 120   } else
 121     cb->printf_metadata(callback_arg, 1, "%s %s", comment_prettyprint,
 122                         comment + offset);
 123   free(comment_prettyprint);
 124 }