1 ! Copyright (C) 2009 Tim Wawrzynczak, Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: sequences io io.encodings.binary io.files io.pathnames
4 strings kernel math io.mmap io.mmap.uchar accessors syntax
5 combinators math.ranges unicode.categories byte-arrays
6 io.encodings.string io.encodings.utf16 assocs math.parser
7 combinators.short-circuit fry namespaces combinators.smart
8 splitting io.encodings.ascii arrays ;
15 "Blues" "Classic Rock" "Country" "Dance" "Disco" "Funk"
16 "Grunge" "Hip-Hop" "Jazz" "Metal" "New Age" "Oldies" "Other"
17 "Pop" "R&B" "Rap" "Reggae" "Rock" "Techno" "Industrial"
18 "Alternative" "Ska" "Death Metal" "Pranks" "Soundtrack"
19 "Euro-Techno" "Ambient" "Trip-Hop" "Vocal" "Jazz+Funk"
20 "Fusion" "Trance" "Classical" "Instrumental" "Acid" "House"
21 "Game" "Sound Clip" "Gospel" "Noise" "AlternRock" "Bass"
22 "Soul" "Punk" "Space" "Meditative" "Instrumental Pop"
23 "Instrumental Rock" "Ethnic" "Gothic" "Darkwave"
24 "Techno-Industrial" "Electronic" "Pop-Folk" "Eurodance"
25 "Dream" "Southern Rock" "Comedy" "Cult" "Gangsta" "Top 40"
26 "Christian Rap" "Pop/Funk" "Jungle" "Native American"
27 "Cabaret" "New Wave" "Psychedelic" "Rave" "Showtunes"
28 "Trailer" "Lo-Fi" "Tribal" "Acid Punk" "Acid Jazz" "Polka"
29 "Retro" "Musical" "Rock & Roll" "Hard Rock" "Folk"
30 "Folk-Rock" "National Folk" "Swing" "Fast Fusion" "Bebop"
31 "Latin" "Revival" "Celtic" "Bluegrass" "Avantgarde"
32 "Gothic Rock" "Progressive Rock" "Psychedelic Rock"
33 "Symphonic Rock" "Slow Rock" "Big Band" "Chorus"
34 "Easy Listening" "Acoustic" "Humour" "Speech" "Chanson"
35 "Opera" "Chamber Music" "Sonata" "Symphony" "Booty Bass"
36 "Primus" "Porn Groove" "Satire" "Slow Jam" "Club" "Tango"
37 "Samba" "Folklore" "Ballad" "Power Ballad" "Rhythmic Soul"
38 "Freestyle" "Duet" "Punk Rock" "Drum Solo" "A capella"
39 "Euro-House" "Dance Hall"
42 TUPLE: header version flags size ;
44 TUPLE: frame frame-id flags size data ;
46 TUPLE: id3v2-info header frames ;
48 TUPLE: id3v1-info title artist album year comment genre ;
50 : <id3v1-info> ( -- object ) id3v1-info new ;
52 : <id3v2-info> ( header frames -- object )
53 [ [ frame-id>> ] keep ] H{ } map>assoc
56 : <header> ( -- object ) header new ;
58 : <frame> ( -- object ) frame new ;
60 : id3v2? ( mmap -- ? ) "ID3" head? ; inline
62 : id3v1? ( mmap -- ? )
63 { [ length 128 >= ] [ 128 tail-slice* "TAG" head? ] } 1&& ; inline
65 : id3v1-frame ( string key -- frame )
70 : id3v1>id3v2 ( id3v1 -- id3v2 )
73 [ title>> "TIT2" id3v1-frame ]
74 [ artist>> "TPE1" id3v1-frame ]
75 [ album>> "TALB" id3v1-frame ]
76 [ year>> "TYER" id3v1-frame ]
77 [ comment>> "COMM" id3v1-frame ]
78 [ genre>> "TCON" id3v1-frame ]
80 ] output>array f swap <id3v2-info> ;
82 : >28bitword ( seq -- int )
83 0 [ [ 7 shift ] dip bitor ] reduce ; inline
85 : filter-text-data ( data -- filtered )
86 [ printable? ] filter ; inline
88 : valid-frame-id? ( id -- ? )
89 [ { [ digit? ] [ LETTER? ] } 1|| ] all? ; inline
91 : read-frame-data ( frame mmap -- frame data )
92 [ 10 over size>> 10 + ] dip <slice> filter-text-data ; inline
94 : decode-text ( string -- string' )
96 { { HEX: ff HEX: fe } { HEX: fe HEX: ff } } member?
97 utf16 ascii ? decode ; inline
99 : (read-frame) ( mmap -- frame )
102 [ 4 head-slice decode-text >>frame-id ]
103 [ [ 4 8 ] dip subseq >28bitword >>size ]
104 [ [ 8 10 ] dip subseq >byte-array >>flags ]
105 [ read-frame-data decode-text >>data ]
108 : read-frame ( mmap -- frame/f )
109 dup 4 head-slice valid-frame-id?
110 [ (read-frame) ] [ drop f ] if ;
112 : remove-frame ( mmap frame -- mmap )
113 size>> 10 + tail-slice ; inline
115 : read-frames ( mmap -- frames )
116 [ dup read-frame dup ]
117 [ [ remove-frame ] keep ]
122 : read-v2-header ( seq -- id3header )
125 [ [ 3 5 ] dip <slice> >array >>version ]
126 [ [ 5 ] dip nth >>flags ]
127 [ [ 6 10 ] dip <slice> >28bitword >>size ]
130 : read-v2-tag-data ( seq -- id3v2-info )
133 [ read-frames ] bi* <id3v2-info> ; inline
137 : skip-to-v1-data ( seq -- seq ) 125 tail-slice* ; inline
139 : (read-v1-tag-data) ( seq -- mp3-file )
142 [ 30 head-slice decode-text filter-text-data >>title ]
143 [ [ 30 60 ] dip subseq decode-text filter-text-data >>artist ]
144 [ [ 60 90 ] dip subseq decode-text filter-text-data >>album ]
145 [ [ 90 94 ] dip subseq decode-text filter-text-data >>year ]
146 [ [ 94 124 ] dip subseq decode-text filter-text-data >>comment ]
147 [ [ 124 ] dip nth number>string >>genre ]
150 : read-v1-tag-data ( seq -- mp3-file )
151 skip-to-v1-data (read-v1-tag-data) ; inline
153 : parse-genre ( string -- n/f )
154 dup "(" ?head-slice drop ")" ?tail-slice drop
155 string>number dup number? [
163 : frame-named ( id3 name quot -- obj )
164 [ swap frames>> at* ] dip
165 [ data>> ] prepose [ drop f ] if ; inline
167 : id3-title ( id3 -- title/f ) "TIT2" [ ] frame-named ; inline
169 : id3-artist ( id3 -- artist/f ) "TPE1" [ ] frame-named ; inline
171 : id3-album ( id3 -- album/f ) "TALB" [ ] frame-named ; inline
173 : id3-year ( id3 -- year/f ) "TYER" [ ] frame-named ; inline
175 : id3-comment ( id3 -- comment/f ) "COMM" [ ] frame-named ; inline
177 : id3-genre ( id3 -- genre/f )
178 "TCON" [ parse-genre ] frame-named ; inline
180 : id3-frame ( id3 key -- value/f ) [ ] frame-named ; inline
182 : file-id3-tags ( path -- id3v2-info/f )
185 { [ dup id3v2? ] [ read-v2-tag-data ] }
186 { [ dup id3v1? ] [ read-v1-tag-data id3v1>id3v2 ] }
189 ] with-mapped-uchar-file ;