def augment():
"""
Pulls in note events from javascript, and interpolates
the missing notes via note_interpolater methods.
Inputs: No direct arguments, but ...
Pulls in JSON note positions via flask
Outputs: New JSON of notes.
"""
data = flask.request.json
new_notes = ""
note_stack, to_fill = notei.make_note_stack(data["notes"])
for i in to_fill:
if i < max_length:
new_note = notei.get_note_to_append(
melody_marks, note_stack[0 : i + max_length + 1], melody_weights, max_length
)
else:
new_note = notei.get_note_to_append(
melody_marks, note_stack[i - max_length : i + max_length + 1], melody_weights, max_length
)
new_notes += "," + str(i) + "," + str(72 - new_note)
note_stack = note_stack[:i] + [(i, [new_note])] + note_stack[i + 1 :]
data["notes"] += new_notes
return flask.jsonify(data)
def play_notes():
"""
Pulls in note positions from javascript, creates a random
filename, and writes .wav file representing those notes.
Inputs: No direct arguments, but ...
Pulls in JSON of note positions via flask
Outputs: filename prefix (sends to javascript)
"""
data = flask.request.json
if data["notes"] == "":
return flask.jsonify(data)
rand_id = str(uuid.uuid4().hex)[:6]
note_data, _ = notei.make_note_stack(data["notes"])
s = []
fs = fluidsynth.Synth()
sfid = fs.sfload(absolute_path + "FluidR3_GM.sf2")
fs.program_select(0, sfid, 0, 0)
for tick, notes in note_data:
if notes != ["x"]:
for val in notes:
fs.noteon(0, int(val), 100)
s = np.append(s, fs.get_samples(int(44100 * 0.2)))
for val in notes:
fs.noteoff(0, int(val))
else:
s = np.append(s, fs.get_samples(int(44100 * 0.2)))
fs.delete()
samps = fluidsynth.raw_audio_string(s)
wf = wave.open(absolute_path + "static/" + rand_id + ".wav", "wb")
wf.setnchannels(2)
wf.setframerate(44100)
wf.setsampwidth(2)
wf.writeframes(b"".join(samps))
wf.close()
return flask.jsonify({"id": rand_id})