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