Added ID3v1 genres support

id3v10.go

@@ -17,7 +17,7 @@ type ID3v1Tags struct {
 	Album    string
 	Year     int
 	Comment  string
-	Genre    int
+	Genre    string
 }
 
 // Retrieves ID3v1 field values of provided io.ReadSeeker (usually a file)
@@ -80,7 +80,7 @@ func GetID3v1Tags(rs io.ReadSeeker) (*ID3v1Tags, error) {
 		Album:    string(album),
 		Year:     year,
 		Comment:  string(comment),
-		Genre:    genre,
+		Genre:    ID3v1Genres[genre],
 	}, nil
 }
 
@@ -104,6 +104,6 @@ func (t *ID3v1Tags) GetComment() string {
 	return t.Comment
 }
 
-func (t *ID3v1Tags) GetGenre() int {
+func (t *ID3v1Tags) GetGenre() string {
 	return t.Genre
 }

id3v11.go

@@ -14,7 +14,7 @@ type ID3v11Tags struct {
 	Year     int
 	Comment  string
 	Track    int
-	Genre    int
+	Genre    string
 }
 
 // Retrieves ID3v1.1 field values of provided io.ReadSeeker (usually a file)
@@ -92,7 +92,7 @@ func GetID3v11Tags(rs io.ReadSeeker) (*ID3v11Tags, error) {
 		Year:     year,
 		Comment:  string(comment),
 		Track:    track,
-		Genre:    genre,
+		Genre:    ID3v1Genres[genre],
 	}, nil
 }
 
@@ -120,6 +120,6 @@ func (t *ID3v11Tags) GetTrack() int {
 	return t.Track
 }
 
-func (t *ID3v11Tags) GetGenre() int {
+func (t *ID3v11Tags) GetGenre() string {
 	return t.Genre
 }

id3v1genres.go

@@ -0,0 +1,198 @@
+package id3ed
+
+// https://en.wikipedia.org/wiki/List_of_ID3v1_Genres
+
+var ID3v1Genres = map[int]string{
+	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:  "Psychadelic",
+	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:  "Bebob",
+	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 music",
+	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",
+}