def test_sample_seq2seq():
embed_size = 12
input_size = output_size = 91
z_size = 33
device = torch.device("cpu")
enc = base.Encoder(input_size=input_size,
embed_size=embed_size,
hidden_size=32,
z_size=z_size,
n_layers=2)
params = {
"output_size": output_size,
"z_size": z_size,
"device": device,
"temperature": 3.0,
"decoder_args": {
"key": "another",
"params": {
"embed_size": embed_size,
"hidden_size": 64,
"z_size": z_size,
"n_layers": 2
}
}
}
seq_decoder = seq_decoder_factory.create("sample", **params)
assert_seq2seq(enc, seq_decoder, sos_token=90)
def test_greedy_trained():
embed_size = 12
input_size = output_size = 91
device = torch.device("cpu")
encoder = base.Encoder(input_size=input_size,
embed_size=embed_size,
hidden_size=32,
z_size=Z_SIZE,
n_layers=2)
params = {
"output_size": output_size,
"z_size": Z_SIZE,
"device": device,
"decoder_args": {
"key": "another",
"params": {
"z_size": Z_SIZE,
"embed_size": embed_size,
"hidden_size": 64,
"n_layers": 2
}
}
}
seq_decoder = seq_decoder_factory.create("greedy", **params)
model = base.Seq2Seq(encoder, seq_decoder, 90)
assert_trained(model)
def test_hier_trained():
embed_size = 12
input_size = output_size = 91
c_size = 134
n_subseq = 2
device = torch.device("cpu")
encoder = base.Encoder(input_size=input_size,
embed_size=embed_size,
hidden_size=32,
z_size=Z_SIZE,
n_layers=2)
params = {
"output_size": output_size,
"z_size": Z_SIZE,
"n_subsequences": n_subseq,
"device": device,
"conductor_args": {
"key": "conductor",
"params": {
"hidden_size": 23,
"c_size": c_size,
"n_layers": 3
}
},
"seq_decoder_args": {
"key": "sample",
"params": {
"z_size": c_size,
"device": device,
"temperature": 3.0,
"decoder_args": {
"key": "another",
"params": {
"embed_size": embed_size,
"hidden_size": 64,
"n_layers": 2,
"dropout_prob": 0.3,
"z_size": c_size
}
}
}
},
}
seq_decoder = seq_decoder_factory.create("hier", **params)
model = base.Seq2Seq(encoder, seq_decoder, 90)
assert_trained(model)
def test_hier_seq2seq():
embed_size = 12
input_size = output_size = 91
z_size = 33
c_size = 121
n_subseq = 2
device = torch.device("cpu")
enc = base.Encoder(input_size=input_size,
embed_size=embed_size,
hidden_size=32,
z_size=z_size,
n_layers=2)
params = {
"output_size": output_size,
"z_size": z_size,
"n_subsequences": n_subseq,
"device": device,
"conductor_args": {
"key": "conductor",
"params": {
"hidden_size": 23,
"c_size": c_size,
"n_layers": 3
}
},
"seq_decoder_args": {
"key": "greedy",
"params": {
"z_size": c_size,
"decoder_args": {
"key": "another",
"params": {
"embed_size": embed_size,
"hidden_size": 64,
"n_layers": 2,
"dropout_prob": 0.3,
"z_size": c_size
}
}
}
},
}
seq_decoder = seq_decoder_factory.create("hier", **params)
assert_seq2seq(enc, seq_decoder, sos_token=90)
def test_greedy_seq2seq_ckpt():
embed_size = 12
input_size = output_size = 91
z_size = 33
device = torch.device("cpu")
encoder = base.Encoder(input_size=input_size, embed_size=embed_size, hidden_size=32, z_size=z_size, n_layers=2)
params = {
"output_size": output_size,
"z_size": z_size,
"device": device,
"decoder_args": {
"key": "another",
"params": {
"z_size": z_size,
"embed_size": embed_size,
"hidden_size": 64,
"n_layers": 2,
"dropout_prob": 0.2
}
}
}
seq_decoder = seq_decoder_factory.create("greedy", **params)
model = base.Seq2Seq(encoder, seq_decoder, 90)
assert_seq2seq_ckpt(model)
def run(_run,
num_steps,
batch_size,
num_workers,
z_size,
beta_settings,
sampling_settings,
free_bits,
encoder_params,
seq_decoder_args,
learning_rate,
train_dir,
eval_dir,
slice_bar,
lr_scheduler_factor,
lr_scheduler_patience,
evaluate_interval=1000,
advanced_interval=200,
print_interval=200,
ckpt_path=None):
global logger
# define dataset ------------------------------------------------------------------------------
enc_mel_to_idx = melody_dataset.MapMelodyToIndex(has_sos_token=False)
dec_mel_to_idx = melody_dataset.MapMelodyToIndex(has_sos_token=True)
ds_train = melody_dataset.MelodyDataset(midi_dir=train_dir,
slice_bars=slice_bar,
transforms=enc_mel_to_idx,
train=True)
dl_train = DataLoader(ds_train,
batch_size=batch_size,
num_workers=num_workers,
drop_last=True)
ds_eval = melody_dataset.MelodyDataset(midi_dir=eval_dir,
slice_bars=slice_bar,
transforms=enc_mel_to_idx,
train=False)
dl_eval = DataLoader(ds_eval,
batch_size=batch_size,
num_workers=num_workers,
drop_last=False)
print(
f"Train/Eval files: {len(ds_train.midi_files)} / {len(ds_eval.midi_files)}"
)
# define logger -------------------------------------------------------------------------------
run_dir = utils.get_run_dir(_run)
writer = SummaryWriter(log_dir=run_dir)
ckpt_dir = Path(writer.log_dir) / "ckpt"
ckpt_dir.mkdir(parents=True, exist_ok=True)
logger = Logger(writer, ckpt_dir=ckpt_dir, melody_dict=dec_mel_to_idx)
# define model --------------------------------------------------------------------------------
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
enc = base.Encoder(input_size=enc_mel_to_idx.dict_size(),
z_size=z_size,
**encoder_params)
params = {
**seq_decoder_args["params"], "output_size":
dec_mel_to_idx.dict_size(),
"device": device
}
seq_decoder = seq_decoder_factory.create(seq_decoder_args["key"], **params)
# ---------------------------------------------
# if not use_hier:
# # flat model ------------------------------------------------------------------------------
# dec = base.AnotherDecoder(output_size=dec_mel_to_idx.dict_size(), z_size=z_size, **decoder_params)
# seq_decoder = base.SimpleSeqDecoder(dec, z_size=z_size, device=device)
# else:
# # hier model ------------------------------------------------------------------------------
# assert conductor_params is not None and c_size is not None and n_subsequences is not None
#
# conductor = hier.Conductor(c_size=c_size, **conductor_params)
# dec = base.AnotherDecoder(output_size=dec_mel_to_idx.dict_size(), z_size=c_size, **decoder_params)
# seq_decoder = hier.HierarchicalSeqDecoder(conductor, dec, n_subsequences=n_subsequences, z_size=z_size,
# device=device)
# ----------------------------------------------
model = base.Seq2Seq(enc,
seq_decoder,
sos_token=dec_mel_to_idx.get_sos_token()).to(device)
print(model)
# define optimizer ----------------------------------------------------------------------------
opt = optim.Adam(model.parameters(), lr=learning_rate, betas=(0.9, 0.999))
# define scheduler ----------------------------------------------------------------------------
lr_scheduler = optim.lr_scheduler.ReduceLROnPlateau(
opt,
mode='min',
factor=lr_scheduler_factor,
patience=lr_scheduler_patience,
verbose=True)
# load checkpoint, if given -------------------------------------------------------------------
step = 1
if ckpt_path is not None:
step = utils.load_ckpt(ckpt_path, model, opt, lr_scheduler, device) + 1
print(
f"Loaded checkpoint from \"{ckpt_path}\" start from step {step}.")
# start train loop ----------------------------------------------------------------------------
train(model,
dl_train,
opt,
lr_scheduler,
device,
beta_settings,
sampling_settings,
free_bits,
step=step,
num_steps=num_steps,
dl_eval=dl_eval,
evaluate_interval=evaluate_interval,
advanced_interval=advanced_interval,
print_interval=print_interval)