def save_midi(self, midi_file_path, onehot_mat, ticksPerQuarterNote=1024):
"""
:param midi_file_path: path to save midi file which is made after predicting
:param onehot_mat: matrix having notes infomation made after predicting
:param ticksPerQuarterNote: criterion of note`s length(duration)
:return:
"""
# tick step = 8th note, quaver
tick_step = ticksPerQuarterNote / 2
# extract note info from one-hot matrix
result = []
for i in range(onehot_mat.shape[0]):
for j in range(onehot_mat.shape[1]):
# if flow is started with new note info, then add new info to result list
if i == 0:
if onehot_mat[i, j] == 1:
result.append({'time': i * tick_step, 'note': j})
else:
if onehot_mat[i, j] == 1 and onehot_mat[i - 1, j] == 0:
result.append({'time': i * tick_step, 'note': j})
# manufacture result list with unroll package`s Keystrike
ks = KeyStrikes(result)
# convert ks to have duration
ks = ks.quantized(ticksPerQuarterNote)
# convert ks to music21`s stream
s = ks._to_music21stream()
# convert s to midi format, again T^T
mf = music21.midi.translate.streamToMidiFile(s)
# save mf info with file
mf.open(midi_file_path, 'wb')
mf.write()
mf.close()
print '\tMidi file(=%s) successfully saved. Total 1/8 beats = %d' % (
midi_file_path, onehot_mat.shape[0])
def save_midi(self, midi_file_path, onehot_mat, ticksPerQuarterNote=1024):
"""
:param midi_file_path: predict 후 만들어진 midi file 을 저장할 path
:param onehot_mat: predict 결과 만들어진 notes 정보를 가진 matrix
:param ticksPerQuarterNote: note 의 길이 기준
:return:
"""
# 틱 간격은 8분의 1음표 단위로
tick_step = ticksPerQuarterNote / 2
# onehot matrix에서 note 정보 추출.
result = []
for i in range(onehot_mat.shape[0]):
for j in range(onehot_mat.shape[1]):
# 새로운 노트가 시작될 경우에 리스트에 추가.
if i == 0:
if onehot_mat[i, j] == 1:
result.append({'time': i * tick_step, 'note': j})
else:
if onehot_mat[i, j] == 1 and onehot_mat[i - 1, j] == 0:
result.append({'time': i * tick_step, 'note': j})
# unroll 패키지의 Keystrike를 이용해서 가공.
ks = KeyStrikes(result)
# 리스트 형태를 duration 을 가지도록 변환.
ks = ks.quantized(ticksPerQuarterNote)
# music21 스트림으로 변환.
s = ks._to_music21stream()
# 다시 midi 파일 형식으로 변환. ( ㅠ.ㅠ )
mf = music21.midi.translate.streamToMidiFile(s)
# 파일로 저장.
mf.open(midi_file_path, 'wb')
mf.write()
mf.close()
print '\tMidi file(=%s) successfully saved. Total 1/8 beats = %d' % (midi_file_path, onehot_mat.shape[0])
def save_midi(self, midi_file_path, onehot_mat, ticksPerQuarterNote=1024):
"""
:param midi_file_path: path to save midi file which is made after predicting
:param onehot_mat: matrix having notes infomation made after predicting
:param ticksPerQuarterNote: criterion of note`s length(duration)
:return:
"""
# tick step = 8th note, quaver
tick_step = ticksPerQuarterNote / 2
# extract note info from one-hot matrix
result = []
for i in range(onehot_mat.shape[0]):
for j in range(onehot_mat.shape[1]):
# if flow is started with new note info, then add new info to result list
if i == 0:
if onehot_mat[i, j] == 1:
result.append({'time': i * tick_step, 'note': j})
else:
if onehot_mat[i, j] == 1 and onehot_mat[i - 1, j] == 0:
result.append({'time': i * tick_step, 'note': j})
# manufacture result list with unroll package`s Keystrike
ks = KeyStrikes(result)
# convert ks to have duration
ks = ks.quantized(ticksPerQuarterNote)
# convert ks to music21`s stream
s = ks._to_music21stream()
# convert s to midi format, again T^T
mf = music21.midi.translate.streamToMidiFile(s)
# save mf info with file
mf.open(midi_file_path, 'wb')
mf.write()
mf.close()
print '\tMidi file(=%s) successfully saved. Total 1/8 beats = %d' % (midi_file_path, onehot_mat.shape[0])
def load_midi(self, path_data, filename, get_longest_length=False):
"""
.
:param path_data: midi files 가 저장되어있는 path
:param filename: midi file name
:param get_longest_length: longest play time 을 가진 파일의 길이만 받을지 말지.
:return:
"""
# read midi file
mf = music21.midi.MidiFile()
path_midifile = path_data + '/' + filename
mf.open(path_midifile)
mf.read()
mf.close()
# midi -> music21 stream -> midi
# mf 파일의 ticksperQuarterNote 를 1024 기준으로 바꿔주기
s = music21.midi.translate.midiFileToStream(mf)
mf = music21.midi.translate.streamToMidiFile(s)
#
# 트랙별 루프 돌면서 note 정보 읽기
#
# 트랙별 event 의 구조는 다음과 같다.
# <MidiTrack 1 -- 1092 events
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# .....
# <MidiEvent TIME_SIGNATURE, t=0, track=1, channel=1, data='\x04\x02\x18\x08'>
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# <MidiEvent NOTE_ON, t=0, track=1, channel=1, pitch=76, velocity=105>
# <MidiEvent DeltaTime, t=512, track=1, channel=1>
# <MidiEvent NOTE_OFF, t=0, track=1, channel=1, pitch=76, velocity=0>
#
result = []
for i in range(len(mf.tracks)):
t = 0
for e in mf.tracks[i].events:
if e.isDeltaTime() and e.time is not None:
t += e.time
elif e.isNoteOn() and e.pitch is not None and e.velocity != 0:
result.append({'time': t, 'note': e.pitch})
# unroll.KeyStrikes 이용
ks = KeyStrikes(result)
# duration 가지도록 list 변환
ks = ks.quantized(mf.ticksPerQuarterNote)
# 가장 sequence 가 긴 파일의 sequence 를 알고 싶을 때
# get_longest_length = True 로 setting 해주면 가장 긴 sequence 와
# mf.ticksPerQuarterNote 만 반환.
if get_longest_length:
return ks, mf.ticksPerQuarterNote
#
# one-hot vector 형식으로 변환
#
# tick 간격 = 1/8분 음표 단위로
self.tick_step = mf.ticksPerQuarterNote / 2
# 총 틱 카운트
total_tick = ks.keystrikes[-1]['time'] + ks.keystrikes[-1]['duration'] * mf.ticksPerQuarterNote
# 총 sequence 갯수
total_beat = total_tick / self.tick_step
# 하나의 midi 파일의 one hot vector 를 저장할 임시 matrix
one_X_train = np.zeros((total_beat + 1, self.data_dim), dtype='int32')
# 1024 기준으로 convert 된 건반 정보를 루프를 돌면서 디코딩
for strike in ks.keystrikes:
# 1/8 음표 단위의 index
idx = strike['time'] / self.tick_step
# 1/8 음표 단위 기준 note 의 지속시간 (index 를 몇개 채울거니? 를 계산)
dur = int(strike['duration'] * 2)
# note 별로 one-hot vector 채우기
for note in strike['note']:
# 지속시간 만큼 making
for i in range(dur):
one_X_train[idx + i, note] = 1
# 끝에 EOS 추가 = EOS 는 data_dim[-1] = 1 인 경우.
one_X_train[-1, self.note_dim] = 1
print '\tMidi file(=%s) successfully loaded. Total 1/8 beats = %d' % (path_midifile, total_beat)
return one_X_train
def load_midi(self, path_data, filename, get_longest_length=False):
"""
.
:param path_data: path including midi files
:param filename: midi file name
:param get_longest_length: Flag to get only the length of files having longest play time, or not
:return:
"""
# read midi file
mf = music21.midi.MidiFile()
path_midifile = path_data + '/' + filename
mf.open(path_midifile)
mf.read()
mf.close()
# midi -> music21 stream -> midi
# change criterion of ticksperQuarterNote of mf
s = music21.midi.translate.midiFileToStream(mf)
mf = music21.midi.translate.streamToMidiFile(s)
#
# get notes infomation while loop tracks
#
# track`s event structure
# <MidiTrack 1 -- 1092 events
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# .....
# <MidiEvent TIME_SIGNATURE, t=0, track=1, channel=1, data='\x04\x02\x18\x08'>
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# <MidiEvent NOTE_ON, t=0, track=1, channel=1, pitch=76, velocity=105>
# <MidiEvent DeltaTime, t=512, track=1, channel=1>
# <MidiEvent NOTE_OFF, t=0, track=1, channel=1, pitch=76, velocity=0>
#
result = []
for i in range(len(mf.tracks)):
t = 0
for e in mf.tracks[i].events:
if e.isDeltaTime() and e.time is not None:
t += e.time
elif e.isNoteOn() and e.pitch is not None and e.velocity != 0:
result.append({'time': t, 'note': e.pitch})
# use unroll.KeyStrikes
ks = KeyStrikes(result)
# convert list to have duration
ks = ks.quantized(mf.ticksPerQuarterNote)
# use If u wanna know the sequence length of file having longest play time,
# set get_longest_length = True, then this function will return
# the longest sequence length and mf.ticksPerQuarterNote 만 반환.
if get_longest_length:
return ks, mf.ticksPerQuarterNote
#
# conver one-hot vector format
#
# tick step = 8th note, quaver
self.tick_step = mf.ticksPerQuarterNote / 2
# total tick count
total_tick = ks.keystrikes[-1][
'time'] + ks.keystrikes[-1]['duration'] * mf.ticksPerQuarterNote
# total sequence number
total_beat = total_tick / self.tick_step
# temporary matrix to save one hot vector of one midi file
one_X_train = np.zeros((total_beat + 1, self.data_dim), dtype='int32')
# decoding the notes info while loop with having 1024 criterion
for strike in ks.keystrikes:
# index, criterion = 8th note(quaver)
idx = strike['time'] / self.tick_step
# during time of note, criterion = 8th note(quaver), calculate how many indices will be filled
dur = int(strike['duration'] * 2)
# set one-hot vector by note
for note in strike['note']:
# set 1 to index as many as duration of note
for i in range(dur):
one_X_train[idx + i, note] = 1
# add EOS at end of sequence, EOS is case that data_dim[-1] = 1
one_X_train[-1, self.note_dim] = 1
print '\tMidi file(=%s) successfully loaded. Total 1/8 beats = %d' % (
path_midifile, total_beat)
return one_X_train
def load_midi(self, path_data, filename, get_longest_length=False):
"""
.
:param path_data: path including midi files
:param filename: midi file name
:param get_longest_length: Flag to get only the length of files having longest play time, or not
:return:
"""
# read midi file
mf = music21.midi.MidiFile()
path_midifile = path_data + '/' + filename
mf.open(path_midifile)
mf.read()
mf.close()
# midi -> music21 stream -> midi
# change criterion of ticksperQuarterNote of mf
s = music21.midi.translate.midiFileToStream(mf)
mf = music21.midi.translate.streamToMidiFile(s)
#
# get notes infomation while loop tracks
#
# track`s event structure
# <MidiTrack 1 -- 1092 events
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# .....
# <MidiEvent TIME_SIGNATURE, t=0, track=1, channel=1, data='\x04\x02\x18\x08'>
# <MidiEvent DeltaTime, t=0, track=1, channel=1>
# <MidiEvent NOTE_ON, t=0, track=1, channel=1, pitch=76, velocity=105>
# <MidiEvent DeltaTime, t=512, track=1, channel=1>
# <MidiEvent NOTE_OFF, t=0, track=1, channel=1, pitch=76, velocity=0>
#
result = []
for i in range(len(mf.tracks)):
t = 0
for e in mf.tracks[i].events:
if e.isDeltaTime() and e.time is not None:
t += e.time
elif e.isNoteOn() and e.pitch is not None and e.velocity != 0:
result.append({'time': t, 'note': e.pitch})
# use unroll.KeyStrikes
ks = KeyStrikes(result)
# convert list to have duration
ks = ks.quantized(mf.ticksPerQuarterNote)
# use If u wanna know the sequence length of file having longest play time,
# set get_longest_length = True, then this function will return
# the longest sequence length and mf.ticksPerQuarterNote 만 반환.
if get_longest_length:
return ks, mf.ticksPerQuarterNote
#
# conver one-hot vector format
#
# tick step = 8th note, quaver
self.tick_step = mf.ticksPerQuarterNote / 2
# total tick count
total_tick = ks.keystrikes[-1]['time'] + ks.keystrikes[-1]['duration'] * mf.ticksPerQuarterNote
# total sequence number
total_beat = total_tick / self.tick_step
# temporary matrix to save one hot vector of one midi file
one_X_train = np.zeros((total_beat + 1, self.data_dim), dtype='int32')
# decoding the notes info while loop with having 1024 criterion
for strike in ks.keystrikes:
# index, criterion = 8th note(quaver)
idx = strike['time'] / self.tick_step
# during time of note, criterion = 8th note(quaver), calculate how many indices will be filled
dur = int(strike['duration'] * 2)
# set one-hot vector by note
for note in strike['note']:
# set 1 to index as many as duration of note
for i in range(dur):
one_X_train[idx + i, note] = 1
# add EOS at end of sequence, EOS is case that data_dim[-1] = 1
one_X_train[-1, self.note_dim] = 1
print '\tMidi file(=%s) successfully loaded. Total 1/8 beats = %d' % (path_midifile, total_beat)
return one_X_train
