def midiToMatrix(midi_file, steps_per_quarter):
"""
Args:
midi_file: Ruta donde se encuentra el archivo midi.
steps_per_quarter: Division del primer tiempo en 4 semicorcheas, 8 en fusas y 16 en semifusas.
Returns:
aa: Matriz binaria, jump: Duracion en tiempo de cada fila, steps_per_bar: Numero de filas en el primer tiempo, steps_per_quarter: Numero de filas del primer compas.
"""
print(midi_file)
sequence = mm.midi_file_to_sequence_proto(midi_file)
quantized_sequence = sequences_lib.quantize_note_sequence(
sequence, steps_per_quarter=steps_per_quarter)
drum_song = mm.DrumTrack()
drum_song.from_quantized_sequence(quantized_sequence, gap_bars=50)
steps_per_bar = drum_song.steps_per_bar
steps_per_quarter = drum_song.steps_per_quarter
print('steps_per_bar: ', drum_song.steps_per_bar)
print('steps_per_quarter: ', drum_song.steps_per_quarter)
drum_song = drum_song.to_sequence()
print("total_time", drum_song.total_time)
count = 0
fila = 0
jump = drum_song.notes[0].end_time - drum_song.notes[0].start_time
print("step_duration", jump)
active = collections.defaultdict(list)
while count + jump <= drum_song.total_time:
active['fila'].append(fila)
active['start_time'].append(count)
active['end_time'].append(count + jump)
count += jump
fila += 1
df_1 = pd.DataFrame(active)
#print(df_1)
aa = np.zeros((fila, PITCH_LIMIT))
print()
print("WaitMidiToMatrix...........:(")
for note in drum_song.notes:
for indice_fila, fila in df_1.iterrows():
if fila.start_time == note.start_time and note.end_time == fila.end_time:
aa[int(fila.fila), note.pitch] = 1
print("Done.......................:)")
print()
return aa, jump, steps_per_bar, steps_per_quarter
def load_midi(midi_path):
"""Load midi as a notesequence."""
midi_path = util.expand_path(midi_path)
ns = mm.midi_file_to_sequence_proto(midi_path)
pitches = np.array([n.pitch for n in ns.notes])
start_times = np.array([n.start_time for n in ns.notes])
end_times = np.array([n.end_time for n in ns.notes])
notes = {'pitches': pitches,
'start_times': start_times,
'end_times': end_times}
# print(ns)
# print(notes)
return ns, notes
def load_midi(midi_path):
"""Load midi as a notesequence."""
midi_path = util.expand_path(midi_path)
ns = mm.midi_file_to_sequence_proto(midi_path)
pitches = np.array([n.pitch for n in ns.notes])
start_times = np.array([n.start_time for n in ns.notes])
end_times = np.array([n.end_time for n in ns.notes])
notes = {'pitches': pitches,
'start_times': start_times,
'end_times': end_times}
# print(ns)
# print(notes)
return ns, notes
def load_midi(midi_path, min_pitch=36, max_pitch=84):
"""Load midi as a notesequence."""
midi_path = util.expand_path(midi_path)
ns = mm.midi_file_to_sequence_proto(midi_path)
pitches = np.array([n.pitch for n in ns.notes])
velocities = np.array([n.velocity for n in ns.notes])
start_times = np.array([n.start_time for n in ns.notes])
end_times = np.array([n.end_time for n in ns.notes])
valid = np.logical_and(pitches >= min_pitch, pitches <= max_pitch)
notes = {'pitches': pitches[valid],
'velocities': velocities[valid],
'start_times': start_times[valid],
'end_times': end_times[valid]}
return ns, notes
def load_midi(midi_path, min_pitch=36, max_pitch=84):
"""Load midi as a notesequence."""
midi_path = util.expand_path(midi_path)
ns = mm.midi_file_to_sequence_proto(midi_path)
pitches = np.array([n.pitch for n in ns.notes])
velocities = np.array([n.velocity for n in ns.notes])
start_times = np.array([n.start_time for n in ns.notes])
end_times = np.array([n.end_time for n in ns.notes])
valid = np.logical_and(pitches >= min_pitch, pitches <= max_pitch)
notes = {'pitches': pitches[valid],
'velocities': velocities[valid],
'start_times': start_times[valid],
'end_times': end_times[valid]}
return ns, notes
def make_notes_sequence(pitches, start_times, durations, qpm):
TEMP_MIDI = "temp.mid"
make_midi(pitches, start_times, durations, qpm, TEMP_MIDI)
return mm.midi_file_to_sequence_proto(TEMP_MIDI)