def test_readFile():
comp = Composer(order = 3)
midi_file_folder = "../midifiles/classical_piano/c_maj/format0"
paths = [os.path.join(midi_file_folder, f) for f in os.listdir(midi_file_folder)]
paths = paths[:3]
for path in paths:
midi = midi.readFile(path)
# midi.quantize(32)
print "Learning (" + path + ") ..."
comp.learnFromMidi(midi)
# print comp.marcovChains[1]
midi = comp.getMidi(1, 1000)
for e in midi.timedEventsList:
print e
samplerate = 44100
bpm = 120
numSamples = 60 * 44100
out = []
s = CSynth(samplerate)
it = iter(midi.timedEventsList)
currentSample = 0
# sample the last events was send to the synth at
lastEventsSample = 0
print "Rendering..."
while currentSample < numSamples:
try:
nextEvents = it.next()
# calculate samples between the two events
nextEventsSample = nextEvents.sample(samplerate, midi.unitsPerBeat, bpm)
sampleDiff = nextEventsSample - lastEventsSample
currentSample += sampleDiff
while sampleDiff > 0:
if sampleDiff < BUFFER_SIZE:
out.extend(s.getSamplesBuffered(sampleDiff))
sampleDiff = 0
else:
out.extend(s.getSamplesBuffered(min(sampleDiff, BUFFER_SIZE)))
sampleDiff -= BUFFER_SIZE
for event in nextEvents.events:
if event.type == Messages.NOTE_ON:
s.noteOn(event.note)
if event.type == Messages.NOTE_OFF:
s.noteOff(event.note)
lastEventsSample = nextEventsSample
except StopIteration:
break
# render rest
while currentSample < numSamples:
if numSamples - currentSample > BUFFER_SIZE:
out.extend(s.getSamplesBuffered(BUFFER_SIZE))
currentSample += BUFFER_SIZE
elif numSamples - currentSample > 0:
out.extend(s.getSamplesBuffered(numSamples - currentSample))
currentSample = numSamples
else:
break
print "Writing to file..."
inout.writeMono("/tmp/asdf_python.wav", out, 44100)
