class FileExporter(object):
"""
Export MIDI data to a file.
"""
def __init__(self, channels, tempo, tpb):
self.f = MIDIFile(channels, ticksPerBeat=tpb)
self.f.addTrackName(0, 0, "Lye")
self.f.addTempo(0, 0, tempo)
self.tpb = tpb
def commit(self):
sio = StringIO()
self.f.writeFile(sio)
return sio.getvalue()
def note(self, channel, time, duration, pitch, velocity):
time /= self.tpb
duration /= self.tpb
self.f.addNote(0, channel, pitch, time, duration, velocity)
def bend(self, channel, time, value):
pass
def pan(self, channel, time, amount):
time /= self.tpb
self.f.addControllerEvent(0, channel, time, 0x0a, amount)
def pc(self, channel, time, program):
time /= self.tpb
self.f.addProgramChange(0, channel, time, program)
def volume(self, channel, time, amount):
time /= self.tpb
self.f.addControllerEvent(0, channel, time, 0x07, amount)
def to_midi(self):
f = MIDIFile(len(self.melodies), ticksPerBeat=self.ticks_per_beat)
time = 0
track = 0
f.addTrackName(track, time, "Lye")
f.addTempo(track, time, self.tempo)
for channel, melody in self.melodies.iteritems():
# Pan.
f.addControllerEvent(track, channel, time, 0x0a, melody.pan)
if melody.instrument in numbered_instruments:
f.addProgramChange(track, channel, time,
numbered_instruments[melody.instrument])
melody.to_midi(f, channel)
sio = StringIO()
f.writeFile(sio)
return sio.getvalue()
def __init__(self, channels, tempo, tpb):
self.f = MIDIFile(channels, ticksPerBeat=tpb)
self.f.addTrackName(0, 0, "Lye")
self.f.addTempo(0, 0, tempo)
self.tpb = tpb
