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socre.py
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190 lines (189 loc) · 6.73 KB
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import glob
from music21 import *
from chord2vec.chord2vec import *
def covert2C_key(file_path):
# load midi file using music21 library
piece = converter.parse(file_path)
# transpose all streams to C major. this process is to reduce the number of states
# store the key of music before transposition.
k = piece.analyze('key')
# save the interval of C and current key
if k.mode == 'minor':
i = interval.Interval(k.parallel.tonic, pitch.Pitch('C'))
else:
i = interval.Interval(k.tonic, pitch.Pitch('C'))
# transpose the music using stored interval
piece = piece.transpose(i)
# return transposed music
return piece
def Chord2number(chord):
# 转换后格式：45.21.78(midi_number)
chord2number = '.'.join(str(n) for n in chord.normalOrder)
return chord2number
def get_score_melody(file_path):
files = 0
Score = []
for midi_file in glob.glob(file_path):
notes = []
note_beats = []
score_single = []
stream = covert2C_key(midi_file)
parts = instrument.partitionByInstrument(stream)
notes_to_parse = parts.parts[0].recurse()
for element in notes_to_parse:
if isinstance(element, note.Note):
note_self = (str(element.pitch)+":"+str(element.duration.quarterLength))
notes.append(note_self)
elif isinstance(element, chord.Chord):
break
note_all = len(notes)
for index in range(len(notes)):
note_beat = notes[index].split(":")[1]
note_beats.append(note_beat)
note_beat_num = len(note_beats)
note_beats_new = list(dict.fromkeys(note_beats))
score_beat = len(note_beats_new)/note_beat_num
notes_no_repeat = list(dict.fromkeys(notes))
score_note = len(notes_no_repeat)/note_all
score_single.append(score_note)
score_single.append(score_beat)
# print(score_note,score_chord_final,score_beat)
Score.append(score_single)
files += 1
if (files == 50):
break
# 平均
score_note_all = score_beat_all = 0
for i in Score:
score_note,score_beat = i[0],i[1]
score_note_all+=score_note
score_beat_all+=score_beat
a = score_note_all/files
c = score_beat_all/files
print(a,c)
return a,c
def get_score_both(file_path):
files = 0
Scores = []
Score = []
for midi_file in glob.glob(file_path):
notes = []
chords = []
note_beats = []
score_single = []
stream = covert2C_key(midi_file)
parts = instrument.partitionByInstrument(stream)
notes_to_parse = parts.parts[0].recurse()
for element in notes_to_parse:
if isinstance(element, note.Note):
note_self = (str(element.pitch)+":"+str(element.duration.quarterLength))
notes.append(note_self)
elif isinstance(element, chord.Chord):
rest_self = (str(Chord2number(element))+":"+str(element.duration.quarterLength))
chords.append(rest_self)
note_all = len(notes)
chord_all = len(chords)
sum_chord_similar_scores = 0
for index in range(len(chords)-1):
chords_1 = chords[index].split(":")[0]
chords_2 = chords[index+1].split(":")[0]
list_t = ['0.4.7', '11.2.5.7', '5.9.0', '2.5.9', '7.11.2', '0.3.7', '9.0.4', '10.2.5', '6.9.0.2', '4.7.10.0', '4.7', '3.7.10', '8.0.3', '9.0.3.5', '1.4.7.9', '7.10.2', '5.8.0', '2.7', '7.0', '2.6.9', '9.0', '4.7.11', '2.5.8.10', '9.1.4', '11.2.6', '9.0.2.5', '8.11.2.4']
if chords_1 or chords_2 not in list_t:
f = 0.5
else:
f = predict_chord2chord(chords_1, chords_2)
sum_chord_similar_scores += f
for index in range(len(notes)):
note_beat = notes[index].split(":")[1]
note_beats.append(note_beat)
note_beat_num = len(note_beats)
note_beats_new = list(dict.fromkeys(note_beats))
score_beat = len(note_beats_new)/note_beat_num
final_chord_similar_scores = sum_chord_similar_scores / chord_all
notes_no_repeat = list(dict.fromkeys(notes))
chords_no_repeat = list(dict.fromkeys(chords))
score_note = len(notes_no_repeat)/note_all
score_chord = len(chords_no_repeat)/chord_all
score_chord_final = score_chord*0.7 + final_chord_similar_scores*0.3
score_single.append(score_note)
score_single.append(score_chord_final)
score_single.append(score_beat)
# print(score_note,score_chord_final,score_beat)
Score.append(score_single)
files += 1
if (files == 50):
break
# 平均
score_note_all = score_chord_final_all = score_beat_all = 0
for i in Score:
score_note,score_chord_final,score_beat = i[0],i[1],i[2]
score_note_all+=score_note
score_chord_final_all+=score_chord_final
score_beat_all+=score_beat
a = score_note_all/files
b = score_chord_final_all/files
c = score_beat_all/files
print(a,b,c)
return a,b,c
def get_score(file_path):
files = 0
Scores = []
Score = []
for midi_file in glob.glob(file_path):
notes = []
chords = []
note_beats = []
score_single = []
stream = covert2C_key(midi_file)
parts = instrument.partitionByInstrument(stream)
notes_to_parse = parts.parts[0].recurse()
for element in notes_to_parse:
if isinstance(element, note.Note):
note_self = (str(element.pitch)+":"+str(element.duration.quarterLength))
notes.append(note_self)
elif isinstance(element, chord.Chord):
rest_self = (str(Chord2number(element))+":"+str(element.duration.quarterLength))
chords.append(rest_self)
note_all = len(notes)
chord_all = len(chords)
sum_chord_similar_scores = 0
for index in range(len(chords)-1):
chords_1 = chords[index].split(":")[0]
chords_2 = chords[index+1].split(":")[0]
sum_chord_similar_scores+=predict_chord2chord(chords_1, chords_2)
for index in range(len(notes)):
note_beat = notes[index].split(":")[1]
note_beats.append(note_beat)
note_beat_num = len(note_beats)
note_beats_new = list(dict.fromkeys(note_beats))
score_beat = len(note_beats_new)/note_beat_num
final_chord_similar_scores = sum_chord_similar_scores / chord_all
notes_no_repeat = list(dict.fromkeys(notes))
chords_no_repeat = list(dict.fromkeys(chords))
score_note = len(notes_no_repeat)/note_all
score_chord = len(chords_no_repeat)/chord_all
score_chord_final = score_chord*0.7 + final_chord_similar_scores*0.3
score_single.append(score_note)
score_single.append(score_chord_final)
score_single.append(score_beat)
# print(score_note,score_chord_final,score_beat)
Score.append(score_single)
files += 1
if (files == 50):
break
# 平均
score_note_all = score_chord_final_all = score_beat_all = 0
for i in Score:
score_note,score_chord_final,score_beat = i[0],i[1],i[2]
score_note_all+=score_note
score_chord_final_all+=score_chord_final
score_beat_all+=score_beat
a = score_note_all/files
b = score_chord_final_all/files
c = score_beat_all/files
print(a,b,c)
return a,b,c
if __name__ == '__main__':
# get_score('./data/*.mid')
# get_score_melody('./data_test/baseline-melody.mid')
get_score_both('./result_midi/*.mid')