#!/usr/bin/env python
from __future__ import division
import os
import pdb
import random
import sys
import time
import parse
import tree
random.seed(time.time())
def main():
composition = {
"verse1": {
"intro": {
"melody": { # Instrument 'melody'
"score_line": "i2 %(time)f %(duration)f 7000 %(octave)d.%(note)s 2",
"octave": 8,
"duration": 10,
"grammars": { # Notes for this instrument to use in this piece
"u": ["G/2 G/2 G/4 G/4 A/4 A/4 A/2 G G A A A3 (w)"],
"w": ["E E F F G/2 G/2 G3 (u)"],
},
},
},
"body": {
"melody": { # Instrument 'melody'
"score_line": "i2 %(time)f %(duration)f 7000 %(octave)d.%(note)s 2",
"octave": 8,
"duration": 10,
"grammars": { # Notes for this instrument to use in this piece
"u": ["C G/2 G/2 G/2 C B, F' C F C B F (w)"],
"w": ["E/4 A/4 D/4 G/4 F/4 F/4 B2 (u)"],
},
},
},
},
"verse2": {
"body": {
"melody": { # Instrument 'melody'
"score_line": "i2 %(time)f %(duration)f 7000 %(octave)d.%(note)s 2",
"octave": 8,
"duration": 10,
"grammars": { # Notes for this instrument to use in this piece
"u": ["C C C C F/2 F/2 F/2 (u)", "D D G/2 A/2 D D (u)"],
},
},
"harmony": { # Instrument 'melody'
"score_line": "i2 %(time)f %(duration)f 7000 %(octave)d.%(note)s 2",
"octave": 8,
"duration": 10,
"grammars": { # Notes for this instrument to use in this piece
"u": ["C C C C F/2 F/2 F/2 (u)", "D D G/2 A/2 D D (u)"],
},
},
},
},
}
print '''f1 0 512 10 1
f2 0 8192 10 .24 .64 .88 .76 .06 .5 .34 .08
f3 0 1025 10 1
t 0 100
'''
section_start = 0
for section in ["verse1", "verse2"]:
print "; Section " + section
subsection_start = section_start
section = composition[section]
for subsection in ["intro", "body", "outro"]:
try:
print "; Subsection " + subsection
subsection = section[subsection]
instrs = []
for instr in subsection:
print ";Instrument " + instr
instr = subsection[instr]
sync = None
max_time = instr["duration"]
instr_score = render_instr(instr, sync, max_time)
instrs.append(instr_score)
for line in generate_csound_score(instr_score, instr["score_line"], subsection_start):
print line
longest_score = max(instrs, key=lambda i: score_len(i))
subsection_start += score_len(longest_score)
section_start += score_len(longest_score)
except KeyError:
pass
def render_instr(instr, sync, max_time):
grammars = instr["grammars"]
for g in instr["grammars"]:
for i in range(len(grammars[g])):
grammars[g][i] = parse.parse(grammars[g][i])
init_node = random.choice(instr["grammars"].keys())
init_score = random.choice(instr["grammars"][init_node])
score = init_score
while True:
time_remaining = max_time - score_len(score)
try:
score = choose_node(score, grammars, time_remaining, sync)
except ValueError:
break
return score
def choose_node(score, grammars, time_remaining, sync):
if time_remaining <= 0:
raise ValueError("No time remaining in the score")
node = None
node_index = None
for item in range(len(score)):
if isinstance(score[item], tree.Tree):
node = score[item].name
node_index = item
if node is None:
raise ValueError("No more nodes to fill in")
options = []
for g in range(len(grammars[node])):
if score_len(grammars[node][g]) <= time_remaining:
options.append(grammars[node][g])
if len(options) == 0:
raise ValueError("No available grammars that will fit in the score")
if sync:
pass
else:
phrase = random.choice(options)
score = score[:node_index-1] + phrase + score[node_index+1:]
return score
def score_len(score):
total = 0
for n in score:
if not isinstance(n, tree.Tree):
total += n.duration
return total
def generate_csound_score(score, score_line, t):
csound_note_values = {
"C": "00",
"C#": "01",
"D": "02",
"D#": "03",
"E": "04",
"F": "05",
"F#": "06",
"G": "07",
"G#": "08",
"A": "09",
"A#": "10",
"B": "11",
}
csound_score = []
for token in score:
if isinstance(token, parse.Chord): # Chords
for note in token.chord:
note = csound_note_values[note]
csound_score.append(score_line % {"time": t, "octave": token.octave, "note": note, "duration": token.duration})
elif isinstance(token, parse.Note): # Individual notes
note = csound_note_values[token.value]
csound_score.append(score_line % {"time": t, "octave": token.octave, "note": note, "duration": token.duration})
elif isinstance(token, tree.Tree):
continue
t += token.duration
return csound_score
if __name__ == "__main__": main()