1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#!/usr/bin/env python
from ply import lex, yacc
class Note():
def __init__(self, value, duration=.25, octave=8):
self.value = value
self.duration = duration
self.octave = octave
self.accidental = None
def __init__(self, value, duration=.5, chord_type="major", octave=5):
self.value = value
self.duration = duration
self.chord_type = chord_type
self.octave = octave
return "Chord %s %s %s" % (self.value, self.duration, self.chord_type, self.octave)
class Rest():
def __init__(self, duration=.25):
self.duration = duration
def __repr__(self):
return "Rest node %s" % self.duration
def parse(score, default_octave=8):
# Tokenize (lex)
tokens = (
"NOTE_LENGTH",
"BASENOTE",
"ACCIDENTAL",
"REST",
"OCTAVE",
"CHORD_TYPE",
"PAREN",
"SYNCOPATE",
)
t_ignore = " |"
#t_BASENOTE = r"[A-Ga-g]"
t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
t_ACCIDENTAL = r"\^{1,2}|_{1,2}|="
t_REST = r"z"
t_OCTAVE = r"'+|,+"
t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9"
t_PAREN = "\(|\)"
t_SYNCOPATE = "\+|-"
def t_NOTE_LENGTH(t):
r"/?\d+"
multiplier = float(t.value.strip("/"))
if t.value.startswith("/"):
multiplier = 1/multiplier
t.value = multiplier
|
>
>
|
>
|
|
>
>
<
|
|
<
<
|
|
|
>
|
|
|
|
>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
#!/usr/bin/env python
import tree
from ply import lex, yacc
class Note():
def __init__(self, value, duration=1, octave=8):
self.duration = duration
if value > 12:
self.duration += 1
value = value % 12
self.value = value
self.octave = octave
def __repr__(self):
return "Note %s %s %s" % (self.value, self.duration, self.octave)
class Chord():
def __init__(self, notes, duration=1):
self.notes = notes
self.duration = duration
def __repr__(self):
return "Chord %s" % (self.notes)
class Rest():
def __init__(self, duration=1):
self.duration = duration
def __repr__(self):
return "Rest node %s" % self.duration
def parse(score, default_octave=8):
# Tokenize (lex)
tokens = (
"NOTE_LENGTH",
"BASENOTE",
"ACCIDENTAL",
"REST",
"OCTAVE",
"CHORD_TYPE",
"BRACKET",
"SYNCOPATE",
"NODE",
)
t_ignore = " |"
t_BASENOTE = r"[A-Ga-g]"
# t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
t_ACCIDENTAL = r"\^{1}|_{1}|="
t_REST = r"z"
t_OCTAVE = r"'+|,+"
t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9"
t_BRACKET = r"\[|\]"
t_SYNCOPATE = "\+|-"
t_NODE = r"\([a-zA-Z0-9_-]+\)"
def t_NOTE_LENGTH(t):
r"/?\d+"
multiplier = float(t.value.strip("/"))
if t.value.startswith("/"):
multiplier = 1/multiplier
t.value = multiplier
|
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
# Parse (yacc)
def p_note_list(p):
'''score : score note
| score chord
| score rest
'''
p[0] = p[1] + [p[2]]
def p_score(p):
'''score : note
| chord
| rest
'''
p[0] = [p[1]]
def p_chord_length(p):
''' chord : chord NOTE_LENGTH
'''
|
>
>
|
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
# Parse (yacc)
def p_note_list(p):
'''score : score note
| score chord
| score rest
| score node
'''
p[0] = p[1] + [p[2]]
def p_score(p):
'''score : note
| chord
| rest
| node
'''
p[0] = [p[1]]
def p_chord_length(p):
''' chord : chord NOTE_LENGTH
'''
|
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
'''
new_note = p[1]
new_note.duration = p[2]
p[0] = new_note
def p_chord(p):
'''chord : PAREN note PAREN
| PAREN note CHORD_TYPE PAREN
'''
pitch = p[2].value
pitch = pitch.upper()
p[0] = Chord(value=pitch, octave=default_octave)
if len(p) > 3:
p[0].chord_type = p[3]
def p_note_syncopate(p):
''' note : note SYNCOPATE
'''
note.syncopate = p[2]
def p_accidental(p):
'''note : ACCIDENTAL note
'''
p[2].accidental = p[1]
p[0] = p[2]
def p_octave(p):
'''note : note OCTAVE
'''
count = len(p[2])
increment_or_decrement = 1 if p[2].startswith("'") else -1
p[1].octave += (count * increment_or_decrement)
p[0] = p[1]
def p_note(p):
'''note : BASENOTE
'''
p[0] = Note(p[1], octave=default_octave)
def p_rest(p):
''' rest : REST
| REST NOTE_LENGTH
'''
p[0] = Rest()
if len(p) > 2:
p[0].duration = p[2]
def p_error(p):
raise Exception("Syntax error at '%s' of element type %s" % (p.value, p.type))
yacc.yacc()
return yacc.parse(score)
|
|
|
|
>
|
>
|
|
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
|
>
>
>
>
>
>
>
>
>
|
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
'''
new_note = p[1]
new_note.duration = p[2]
p[0] = new_note
def p_chord(p):
'''chord : BRACKET note BRACKET
| BRACKET note CHORD_TYPE BRACKET
'''
root_note = p[2].value
chorded_notes = []
for offset in [0, 4, 7]:
chorded_notes.append(Note(root_note+offset, octave=p[2].octave))
p[0] = Chord(notes=chorded_notes)
def p_note_syncopate(p):
''' note : note SYNCOPATE
'''
note.syncopate = p[2]
def p_accidental(p):
'''note : ACCIDENTAL note
'''
if p[1] == "^":
p[2].value += 1
else:
p[2].value -= 1
p[0] = p[2]
def p_octave(p):
'''note : note OCTAVE
'''
count = len(p[2])
increment_or_decrement = 1 if p[2].startswith("'") else -1
p[1].octave += (count * increment_or_decrement)
p[0] = p[1]
def p_note(p):
'''note : BASENOTE
'''
notes = {
"C": 0,
"D": 2,
"E": 4,
"F": 5,
"G": 7,
"A": 9,
"B": 11
}
n = notes[p[1]]
p[0] = Note(n, octave=default_octave)
def p_rest(p):
''' rest : REST
| REST NOTE_LENGTH
'''
p[0] = Rest()
if len(p) > 2:
p[0].duration = p[2]
def p_node(p):
'''node : NODE
'''
p[0] = tree.Tree(p[1].strip("(").strip(")"))
def p_error(p):
# import ipdb
# ipdb.set_trace()
print p
raise Exception("Syntax error at '%s' of element type %s" % (p.value, p.type))
yacc.yacc()
return yacc.parse(score)
|