def generate(self):
pitch = random.randint(0, N_PITCHES - 1)
octave = random.randint(3, 6)
reference_note = Note()
reference_note.pitch = pitch
reference_note.octave = octave
melody = Melody()
for j in range(0, DEF_NUMBER_NOTES):
# Always create a new object
new_note = Note()
new_note.pitch = reference_note.pitch
new_note.octave = reference_note.octave
if j != 0:
new_note.articulated = True
melody.notes.append(new_note)
return melody
def read_file(self, file):
# Array of Melody objects
result = []
pattern = midi.read_midifile(file)
resolution = pattern.resolution
note_window = DEF_TICK_STEP_SIZE
for idx, track in enumerate(pattern):
new_melody = Melody()
new_melody.setTempo(resolution)
notes_played = []
track.make_ticks_abs()
for event in track:
if (isinstance(event, midi.NoteOnEvent)
or isinstance(event, midi.NoteOffEvent)):
if event.data[1] > 0:
# We got the duration of the pitch last played
tick_information = TickInformation()
tick_information.note = event.data[0]
tick_information.start_tick = event.tick
elif event.data[1] == 0:
# This gives us the duration of the pitch
tick_information.end_tick = event.tick
notes_played.append(tick_information)
elif (isinstance(event, midi.TrackNameEvent)):
new_melody.description = event.text
new_melody.notes = []
last_tick = reversed(track).next().tick
for i in range(0, last_tick, int(note_window)):
new_note = Note()
junk_elements = []
for tick in notes_played:
# We already handled this time point
if i >= tick.end_tick:
junk_elements.append(tick)
if tick.start_tick <= i and i < tick.end_tick:
# A note is being played in the time frame
new_note.setFromMidiPitch(tick.note)
new_melody.notes.append(new_note)
# Do not repeat the note if it was already played once before
if tick.played == True:
new_note.articulated = True
tick.played = True
break
elif i < tick.start_tick:
# We have yet to check if there is a note or silence
new_note.pitch = SILENCE
new_melody.notes.append(new_note)
break
# Reduce notes played container
for el in junk_elements:
notes_played.remove(el)
# Check if the track is too small
# This can be the case for description tracks
if len(new_melody.notes) < 10:
#print "Too short track. Ignoring it."
continue
result.append(new_melody)
result = self.clean_melodies(result)
return result, note_window
