FFmpeg: libavformat/id3v1.c Source File

00001 /*
00002  * ID3v1 header parser
00003  * Copyright (c) 2003 Fabrice Bellard
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "id3v1.h"
00023 #include "libavcodec/avcodec.h"
00024 
00025 const char * const ff_id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
00026       [0] = "Blues",
00027       [1] = "Classic Rock",
00028       [2] = "Country",
00029       [3] = "Dance",
00030       [4] = "Disco",
00031       [5] = "Funk",
00032       [6] = "Grunge",
00033       [7] = "Hip-Hop",
00034       [8] = "Jazz",
00035       [9] = "Metal",
00036      [10] = "New Age",
00037      [11] = "Oldies",
00038      [12] = "Other",
00039      [13] = "Pop",
00040      [14] = "R&B",
00041      [15] = "Rap",
00042      [16] = "Reggae",
00043      [17] = "Rock",
00044      [18] = "Techno",
00045      [19] = "Industrial",
00046      [20] = "Alternative",
00047      [21] = "Ska",
00048      [22] = "Death Metal",
00049      [23] = "Pranks",
00050      [24] = "Soundtrack",
00051      [25] = "Euro-Techno",
00052      [26] = "Ambient",
00053      [27] = "Trip-Hop",
00054      [28] = "Vocal",
00055      [29] = "Jazz+Funk",
00056      [30] = "Fusion",
00057      [31] = "Trance",
00058      [32] = "Classical",
00059      [33] = "Instrumental",
00060      [34] = "Acid",
00061      [35] = "House",
00062      [36] = "Game",
00063      [37] = "Sound Clip",
00064      [38] = "Gospel",
00065      [39] = "Noise",
00066      [40] = "AlternRock",
00067      [41] = "Bass",
00068      [42] = "Soul",
00069      [43] = "Punk",
00070      [44] = "Space",
00071      [45] = "Meditative",
00072      [46] = "Instrumental Pop",
00073      [47] = "Instrumental Rock",
00074      [48] = "Ethnic",
00075      [49] = "Gothic",
00076      [50] = "Darkwave",
00077      [51] = "Techno-Industrial",
00078      [52] = "Electronic",
00079      [53] = "Pop-Folk",
00080      [54] = "Eurodance",
00081      [55] = "Dream",
00082      [56] = "Southern Rock",
00083      [57] = "Comedy",
00084      [58] = "Cult",
00085      [59] = "Gangsta",
00086      [60] = "Top 40",
00087      [61] = "Christian Rap",
00088      [62] = "Pop/Funk",
00089      [63] = "Jungle",
00090      [64] = "Native American",
00091      [65] = "Cabaret",
00092      [66] = "New Wave",
00093      [67] = "Psychadelic",
00094      [68] = "Rave",
00095      [69] = "Showtunes",
00096      [70] = "Trailer",
00097      [71] = "Lo-Fi",
00098      [72] = "Tribal",
00099      [73] = "Acid Punk",
00100      [74] = "Acid Jazz",
00101      [75] = "Polka",
00102      [76] = "Retro",
00103      [77] = "Musical",
00104      [78] = "Rock & Roll",
00105      [79] = "Hard Rock",
00106      [80] = "Folk",
00107      [81] = "Folk-Rock",
00108      [82] = "National Folk",
00109      [83] = "Swing",
00110      [84] = "Fast Fusion",
00111      [85] = "Bebob",
00112      [86] = "Latin",
00113      [87] = "Revival",
00114      [88] = "Celtic",
00115      [89] = "Bluegrass",
00116      [90] = "Avantgarde",
00117      [91] = "Gothic Rock",
00118      [92] = "Progressive Rock",
00119      [93] = "Psychedelic Rock",
00120      [94] = "Symphonic Rock",
00121      [95] = "Slow Rock",
00122      [96] = "Big Band",
00123      [97] = "Chorus",
00124      [98] = "Easy Listening",
00125      [99] = "Acoustic",
00126     [100] = "Humour",
00127     [101] = "Speech",
00128     [102] = "Chanson",
00129     [103] = "Opera",
00130     [104] = "Chamber Music",
00131     [105] = "Sonata",
00132     [106] = "Symphony",
00133     [107] = "Booty Bass",
00134     [108] = "Primus",
00135     [109] = "Porn Groove",
00136     [110] = "Satire",
00137     [111] = "Slow Jam",
00138     [112] = "Club",
00139     [113] = "Tango",
00140     [114] = "Samba",
00141     [115] = "Folklore",
00142     [116] = "Ballad",
00143     [117] = "Power Ballad",
00144     [118] = "Rhythmic Soul",
00145     [119] = "Freestyle",
00146     [120] = "Duet",
00147     [121] = "Punk Rock",
00148     [122] = "Drum Solo",
00149     [123] = "A capella",
00150     [124] = "Euro-House",
00151     [125] = "Dance Hall",
00152     [126] = "Goa",
00153     [127] = "Drum & Bass",
00154     [128] = "Club-House",
00155     [129] = "Hardcore",
00156     [130] = "Terror",
00157     [131] = "Indie",
00158     [132] = "BritPop",
00159     [133] = "Negerpunk",
00160     [134] = "Polsk Punk",
00161     [135] = "Beat",
00162     [136] = "Christian Gangsta",
00163     [137] = "Heavy Metal",
00164     [138] = "Black Metal",
00165     [139] = "Crossover",
00166     [140] = "Contemporary Christian",
00167     [141] = "Christian Rock",
00168     [142] = "Merengue",
00169     [143] = "Salsa",
00170     [144] = "Thrash Metal",
00171     [145] = "Anime",
00172     [146] = "JPop",
00173     [147] = "SynthPop",
00174 };
00175 
00176 static void get_string(AVFormatContext *s, const char *key,
00177                        const uint8_t *buf, int buf_size)
00178 {
00179     int i, c;
00180     char *q, str[512];
00181 
00182     q = str;
00183     for(i = 0; i < buf_size; i++) {
00184         c = buf[i];
00185         if (c == '\0')
00186             break;
00187         if ((q - str) >= sizeof(str) - 1)
00188             break;
00189         *q++ = c;
00190     }
00191     *q = '\0';
00192 
00193     if (*str)
00194         av_metadata_set2(&s->metadata, key, str, 0);
00195 }
00196 
00202 static int parse_tag(AVFormatContext *s, const uint8_t *buf)
00203 {
00204     char str[5];
00205     int genre;
00206 
00207     if (!(buf[0] == 'T' &&
00208           buf[1] == 'A' &&
00209           buf[2] == 'G'))
00210         return -1;
00211     get_string(s, "title",   buf +  3, 30);
00212     get_string(s, "artist",  buf + 33, 30);
00213     get_string(s, "album",   buf + 63, 30);
00214     get_string(s, "date",    buf + 93,  4);
00215     get_string(s, "comment", buf + 97, 30);
00216     if (buf[125] == 0 && buf[126] != 0) {
00217         snprintf(str, sizeof(str), "%d", buf[126]);
00218         av_metadata_set2(&s->metadata, "track", str, 0);
00219     }
00220     genre = buf[127];
00221     if (genre <= ID3v1_GENRE_MAX)
00222         av_metadata_set2(&s->metadata, "genre", ff_id3v1_genre_str[genre], 0);
00223     return 0;
00224 }
00225 
00226 void ff_id3v1_read(AVFormatContext *s)
00227 {
00228     int ret;
00229     uint8_t buf[ID3v1_TAG_SIZE];
00230     int64_t filesize, position = url_ftell(s->pb);
00231 
00232     if (!url_is_streamed(s->pb)) {
00233         /* XXX: change that */
00234         filesize = avio_size(s->pb);
00235         if (filesize > 128) {
00236             avio_seek(s->pb, filesize - 128, SEEK_SET);
00237             ret = avio_read(s->pb, buf, ID3v1_TAG_SIZE);
00238             if (ret == ID3v1_TAG_SIZE) {
00239                 parse_tag(s, buf);
00240             }
00241             avio_seek(s->pb, position, SEEK_SET);
00242         }
00243     }
00244 }