libavformat/id3v1.c

   1 /*
   2  * ID3v1 header parser
   3  * Copyright (c) 2003 Fabrice Bellard
   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 "id3v1.h"
  23 #include "libavcodec/avcodec.h"
  24 #include "libavutil/dict.h"
  25
  26 /* See Genre List at http://id3.org/id3v2.3.0 */
  27 const char * const ff_id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
  28       [0] = "Blues",
  29       [1] = "Classic Rock",
  30       [2] = "Country",
  31       [3] = "Dance",
  32       [4] = "Disco",
  33       [5] = "Funk",
  34       [6] = "Grunge",
  35       [7] = "Hip-Hop",
  36       [8] = "Jazz",
  37       [9] = "Metal",
  38      [10] = "New Age",
  39      [11] = "Oldies",
  40      [12] = "Other",
  41      [13] = "Pop",
  42      [14] = "R&B",
  43      [15] = "Rap",
  44      [16] = "Reggae",
  45      [17] = "Rock",
  46      [18] = "Techno",
  47      [19] = "Industrial",
  48      [20] = "Alternative",
  49      [21] = "Ska",
  50      [22] = "Death Metal",
  51      [23] = "Pranks",
  52      [24] = "Soundtrack",
  53      [25] = "Euro-Techno",
  54      [26] = "Ambient",
  55      [27] = "Trip-Hop",
  56      [28] = "Vocal",
  57      [29] = "Jazz+Funk",
  58      [30] = "Fusion",
  59      [31] = "Trance",
  60      [32] = "Classical",
  61      [33] = "Instrumental",
  62      [34] = "Acid",
  63      [35] = "House",
  64      [36] = "Game",
  65      [37] = "Sound Clip",
  66      [38] = "Gospel",
  67      [39] = "Noise",
  68      [40] = "AlternRock",
  69      [41] = "Bass",
  70      [42] = "Soul",
  71      [43] = "Punk",
  72      [44] = "Space",
  73      [45] = "Meditative",
  74      [46] = "Instrumental Pop",
  75      [47] = "Instrumental Rock",
  76      [48] = "Ethnic",
  77      [49] = "Gothic",
  78      [50] = "Darkwave",
  79      [51] = "Techno-Industrial",
  80      [52] = "Electronic",
  81      [53] = "Pop-Folk",
  82      [54] = "Eurodance",
  83      [55] = "Dream",
  84      [56] = "Southern Rock",
  85      [57] = "Comedy",
  86      [58] = "Cult",
  87      [59] = "Gangsta",
  88      [60] = "Top 40",
  89      [61] = "Christian Rap",
  90      [62] = "Pop/Funk",
  91      [63] = "Jungle",
  92      [64] = "Native American",
  93      [65] = "Cabaret",
  94      [66] = "New Wave",
  95      [67] = "Psychadelic", /* sic, the misspelling is used in the specification */
  96      [68] = "Rave",
  97      [69] = "Showtunes",
  98      [70] = "Trailer",
  99      [71] = "Lo-Fi",
 100      [72] = "Tribal",
 101      [73] = "Acid Punk",
 102      [74] = "Acid Jazz",
 103      [75] = "Polka",
 104      [76] = "Retro",
 105      [77] = "Musical",
 106      [78] = "Rock & Roll",
 107      [79] = "Hard Rock",
 108      [80] = "Folk",
 109      [81] = "Folk-Rock",
 110      [82] = "National Folk",
 111      [83] = "Swing",
 112      [84] = "Fast Fusion",
 113      [85] = "Bebob",
 114      [86] = "Latin",
 115      [87] = "Revival",
 116      [88] = "Celtic",
 117      [89] = "Bluegrass",
 118      [90] = "Avantgarde",
 119      [91] = "Gothic Rock",
 120      [92] = "Progressive Rock",
 121      [93] = "Psychedelic Rock",
 122      [94] = "Symphonic Rock",
 123      [95] = "Slow Rock",
 124      [96] = "Big Band",
 125      [97] = "Chorus",
 126      [98] = "Easy Listening",
 127      [99] = "Acoustic",
 128     [100] = "Humour",
 129     [101] = "Speech",
 130     [102] = "Chanson",
 131     [103] = "Opera",
 132     [104] = "Chamber Music",
 133     [105] = "Sonata",
 134     [106] = "Symphony",
 135     [107] = "Booty Bass",
 136     [108] = "Primus",
 137     [109] = "Porn Groove",
 138     [110] = "Satire",
 139     [111] = "Slow Jam",
 140     [112] = "Club",
 141     [113] = "Tango",
 142     [114] = "Samba",
 143     [115] = "Folklore",
 144     [116] = "Ballad",
 145     [117] = "Power Ballad",
 146     [118] = "Rhythmic Soul",
 147     [119] = "Freestyle",
 148     [120] = "Duet",
 149     [121] = "Punk Rock",
 150     [122] = "Drum Solo",
 151     [123] = "A capella",
 152     [124] = "Euro-House",
 153     [125] = "Dance Hall",
 154     [126] = "Goa",
 155     [127] = "Drum & Bass",
 156     [128] = "Club-House",
 157     [129] = "Hardcore",
 158     [130] = "Terror",
 159     [131] = "Indie",
 160     [132] = "BritPop",
 161     [133] = "Negerpunk",
 162     [134] = "Polsk Punk",
 163     [135] = "Beat",
 164     [136] = "Christian Gangsta",
 165     [137] = "Heavy Metal",
 166     [138] = "Black Metal",
 167     [139] = "Crossover",
 168     [140] = "Contemporary Christian",
 169     [141] = "Christian Rock",
 170     [142] = "Merengue",
 171     [143] = "Salsa",
 172     [144] = "Thrash Metal",
 173     [145] = "Anime",
 174     [146] = "JPop",
 175     [147] = "SynthPop",
 176 };
 177
 178 static void get_string(AVFormatContext *s, const char *key,
 179                        const uint8_t *buf, int buf_size)
 180 {
 181     int i, c;
 182     char *q, str[512], *first_free_space = NULL;
 183
 184     q = str;
 185     for(i = 0; i < buf_size; i++) {
 186         c = buf[i];
 187         if (c == '\0')
 188             break;
 189         if ((q - str) >= sizeof(str) - 1)
 190             break;
 191         if (c == ' ') {
 192             if (!first_free_space)
 193                 first_free_space = q;
 194         } else {
 195             first_free_space = NULL;
 196         }
 197         *q++ = c;
 198     }
 199     *q = '\0';
 200
 201     if (first_free_space)
 202         *first_free_space = '\0';
 203
 204     if (*str)
 205         av_dict_set(&s->metadata, key, str, 0);
 206 }
 207
 208 /**
 209  * Parse an ID3v1 tag
 210  *
 211  * @param buf ID3v1_TAG_SIZE long buffer containing the tag
 212  */
 213 static int parse_tag(AVFormatContext *s, const uint8_t *buf)
 214 {
 215     int genre;
 216
 217     if (!(buf[0] == 'T' &&
 218           buf[1] == 'A' &&
 219           buf[2] == 'G'))
 220         return -1;
 221     get_string(s, "title",   buf +  3, 30);
 222     get_string(s, "artist",  buf + 33, 30);
 223     get_string(s, "album",   buf + 63, 30);
 224     get_string(s, "date",    buf + 93,  4);
 225     get_string(s, "comment", buf + 97, 30);
 226     if (buf[125] == 0 && buf[126] != 0) {
 227         av_dict_set_int(&s->metadata, "track", buf[126], 0);
 228     }
 229     genre = buf[127];
 230     if (genre <= ID3v1_GENRE_MAX)
 231         av_dict_set(&s->metadata, "genre", ff_id3v1_genre_str[genre], 0);
 232     return 0;
 233 }
 234
 235 void ff_id3v1_read(AVFormatContext *s)
 236 {
 237     int ret;
 238     uint8_t buf[ID3v1_TAG_SIZE];
 239     int64_t filesize, position = avio_tell(s->pb);
 240
 241     if (s->pb->seekable) {
 242         /* XXX: change that */
 243         filesize = avio_size(s->pb);
 244         if (filesize > 128) {
 245             avio_seek(s->pb, filesize - 128, SEEK_SET);
 246             ret = avio_read(s->pb, buf, ID3v1_TAG_SIZE);
 247             if (ret == ID3v1_TAG_SIZE) {
 248                 parse_tag(s, buf);
 249             }
 250             avio_seek(s->pb, position, SEEK_SET);
 251         }
 252     }
 253 }