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id3v1.c
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/*
* ID3v1 header parser
* Copyright (c) 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "id3v1.h"
#include "libavutil/dict.h"
/* See Genre List at http://id3.org/id3v2.3.0 */
const char * const ff_id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
[0] = "Blues",
[1] = "Classic Rock",
[2] = "Country",
[3] = "Dance",
[4] = "Disco",
[5] = "Funk",
[6] = "Grunge",
[7] = "Hip-Hop",
[8] = "Jazz",
[9] = "Metal",
[10] = "New Age",
[11] = "Oldies",
[12] = "Other",
[13] = "Pop",
[14] = "R&B",
[15] = "Rap",
[16] = "Reggae",
[17] = "Rock",
[18] = "Techno",
[19] = "Industrial",
[20] = "Alternative",
[21] = "Ska",
[22] = "Death Metal",
[23] = "Pranks",
[24] = "Soundtrack",
[25] = "Euro-Techno",
[26] = "Ambient",
[27] = "Trip-Hop",
[28] = "Vocal",
[29] = "Jazz+Funk",
[30] = "Fusion",
[31] = "Trance",
[32] = "Classical",
[33] = "Instrumental",
[34] = "Acid",
[35] = "House",
[36] = "Game",
[37] = "Sound Clip",
[38] = "Gospel",
[39] = "Noise",
[40] = "AlternRock",
[41] = "Bass",
[42] = "Soul",
[43] = "Punk",
[44] = "Space",
[45] = "Meditative",
[46] = "Instrumental Pop",
[47] = "Instrumental Rock",
[48] = "Ethnic",
[49] = "Gothic",
[50] = "Darkwave",
[51] = "Techno-Industrial",
[52] = "Electronic",
[53] = "Pop-Folk",
[54] = "Eurodance",
[55] = "Dream",
[56] = "Southern Rock",
[57] = "Comedy",
[58] = "Cult",
[59] = "Gangsta",
[60] = "Top 40",
[61] = "Christian Rap",
[62] = "Pop/Funk",
[63] = "Jungle",
[64] = "Native American",
[65] = "Cabaret",
[66] = "New Wave",
[67] = "Psychedelic",
[68] = "Rave",
[69] = "Showtunes",
[70] = "Trailer",
[71] = "Lo-Fi",
[72] = "Tribal",
[73] = "Acid Punk",
[74] = "Acid Jazz",
[75] = "Polka",
[76] = "Retro",
[77] = "Musical",
[78] = "Rock & Roll",
[79] = "Hard Rock",
[80] = "Folk",
[81] = "Folk-Rock",
[82] = "National Folk",
[83] = "Swing",
[84] = "Fast Fusion",
[85] = "Bebop",
[86] = "Latin",
[87] = "Revival",
[88] = "Celtic",
[89] = "Bluegrass",
[90] = "Avantgarde",
[91] = "Gothic Rock",
[92] = "Progressive Rock",
[93] = "Psychedelic Rock",
[94] = "Symphonic Rock",
[95] = "Slow Rock",
[96] = "Big Band",
[97] = "Chorus",
[98] = "Easy Listening",
[99] = "Acoustic",
[100] = "Humour",
[101] = "Speech",
[102] = "Chanson",
[103] = "Opera",
[104] = "Chamber Music",
[105] = "Sonata",
[106] = "Symphony",
[107] = "Booty Bass",
[108] = "Primus",
[109] = "Porn Groove",
[110] = "Satire",
[111] = "Slow Jam",
[112] = "Club",
[113] = "Tango",
[114] = "Samba",
[115] = "Folklore",
[116] = "Ballad",
[117] = "Power Ballad",
[118] = "Rhythmic Soul",
[119] = "Freestyle",
[120] = "Duet",
[121] = "Punk Rock",
[122] = "Drum Solo",
[123] = "A Cappella",
[124] = "Euro-House",
[125] = "Dance Hall",
[126] = "Goa",
[127] = "Drum & Bass",
[128] = "Club-House",
[129] = "Hardcore Techno",
[130] = "Terror",
[131] = "Indie",
[132] = "BritPop",
[133] = "Negerpunk",
[134] = "Polsk Punk",
[135] = "Beat",
[136] = "Christian Gangsta Rap",
[137] = "Heavy Metal",
[138] = "Black Metal",
[139] = "Crossover",
[140] = "Contemporary Christian",
[141] = "Christian Rock",
[142] = "Merengue",
[143] = "Salsa",
[144] = "Thrash Metal",
[145] = "Anime",
[146] = "Jpop",
[147] = "Synthpop",
[148] = "Abstract",
[149] = "Art Rock",
[150] = "Baroque",
[151] = "Bhangra",
[152] = "Big Beat",
[153] = "Breakbeat",
[154] = "Chillout",
[155] = "Downtempo",
[156] = "Dub",
[157] = "EBM",
[158] = "Eclectic",
[159] = "Electro",
[160] = "Electroclash",
[161] = "Emo",
[162] = "Experimental",
[163] = "Garage",
[164] = "Global",
[165] = "IDM",
[166] = "Illbient",
[167] = "Industro-Goth",
[168] = "Jam Band",
[169] = "Krautrock",
[170] = "Leftfield",
[171] = "Lounge",
[172] = "Math Rock",
[173] = "New Romantic",
[174] = "Nu-Breakz",
[175] = "Post-Punk",
[176] = "Post-Rock",
[177] = "Psytrance",
[178] = "Shoegaze",
[179] = "Space Rock",
[180] = "Trop Rock",
[181] = "World Music",
[182] = "Neoclassical",
[183] = "Audiobook",
[184] = "Audio Theatre",
[185] = "Neue Deutsche Welle",
[186] = "Podcast",
[187] = "Indie Rock",
[188] = "G-Funk",
[189] = "Dubstep",
[190] = "Garage Rock",
[191] = "Psybient"
};
static void get_string(AVFormatContext *s, const char *key,
const uint8_t *buf, int buf_size)
{
int i, c;
char *q, str[512], *first_free_space = NULL;
q = str;
for(i = 0; i < buf_size; i++) {
c = buf[i];
if (c == '\0')
break;
if ((q - str) >= sizeof(str) - 1)
break;
if (c == ' ') {
if (!first_free_space)
first_free_space = q;
} else {
first_free_space = NULL;
}
*q++ = c;
}
*q = '\0';
if (first_free_space)
*first_free_space = '\0';
if (*str)
av_dict_set(&s->metadata, key, str, 0);
}
/**
* Parse an ID3v1 tag
*
* @param buf ID3v1_TAG_SIZE long buffer containing the tag
*/
static int parse_tag(AVFormatContext *s, const uint8_t *buf)
{
int genre;
if (!(buf[0] == 'T' &&
buf[1] == 'A' &&
buf[2] == 'G'))
return -1;
get_string(s, "title", buf + 3, 30);
get_string(s, "artist", buf + 33, 30);
get_string(s, "album", buf + 63, 30);
get_string(s, "date", buf + 93, 4);
get_string(s, "comment", buf + 97, 30);
if (buf[125] == 0 && buf[126] != 0) {
av_dict_set_int(&s->metadata, "track", buf[126], 0);
}
genre = buf[127];
if (genre <= ID3v1_GENRE_MAX)
av_dict_set(&s->metadata, "genre", ff_id3v1_genre_str[genre], 0);
return 0;
}
void ff_id3v1_read(AVFormatContext *s)
{
int ret;
uint8_t buf[ID3v1_TAG_SIZE];
int64_t filesize, position = avio_tell(s->pb);
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
/* XXX: change that */
filesize = avio_size(s->pb);
if (filesize > 128) {
avio_seek(s->pb, filesize - 128, SEEK_SET);
ret = avio_read(s->pb, buf, ID3v1_TAG_SIZE);
if (ret == ID3v1_TAG_SIZE) {
parse_tag(s, buf);
}
avio_seek(s->pb, position, SEEK_SET);
}
}
}