class Inferencer:
def __init__(
self,
paths,
labels,
checkpoint_Path,
output_Path
):
self.Datset_Generate(paths, labels)
self.Model_Generate()
self.Load_Checkpoint(checkpoint_Path)
self.output_Path = output_Path
def Datset_Generate(self, paths, labels):
self.dataLoader = torch.utils.data.DataLoader(
dataset= Dataset(paths, labels),
shuffle= False,
collate_fn= Collater(),
batch_size= hp_Dict['Train']['Batch']['Eval']['Speaker'],
num_workers= hp_Dict['Train']['Num_Workers'],
pin_memory= True
)
def Model_Generate(self):
self.model = Encoder(
mel_dims= hp_Dict['Sound']['Mel_Dim'],
lstm_size= hp_Dict['Encoder']['LSTM']['Sizes'],
lstm_stacks= hp_Dict['Encoder']['LSTM']['Stacks'],
embedding_size= hp_Dict['Encoder']['Embedding_Size'],
).to(device)
logging.info(self.model)
@torch.no_grad()
def Inference_Step(self, mels):
return Normalize(
self.model(mels.to(device)),
samples= hp_Dict['Train']['Inference']['Samples']
)
def Inference(self):
logging.info('(Steps: {}) Start inference.'.format(self.steps))
self.model.eval()
embeddings, labels = zip(*[
(self.Inference_Step(mels), labels)
for mels, labels in tqdm(self.dataLoader, desc='[Inference]')
])
self.TSNE(
embeddings= torch.cat(embeddings, dim= 0),
labels= [label for label_List in labels for label in label_List]
)
def TSNE(self, embeddings, labels):
scatters = TSNE(n_components=2, random_state= 0).fit_transform(embeddings.cpu().numpy())
fig = plt.figure(figsize=(8, 8))
current_Label = labels[0]
current_Index = 0
for index, label in enumerate(labels[1:], 1):
if label != current_Label:
plt.scatter(scatters[current_Index:index, 0], scatters[current_Index:index, 1], label= '{}'.format(current_Label))
current_Label = label
current_Index = index
plt.scatter(scatters[current_Index:, 0], scatters[current_Index:, 1], label= '{}'.format(current_Label))
plt.legend()
plt.tight_layout()
plt.savefig(self.output_Path)
plt.close(fig)
def Load_Checkpoint(self, checkpoint_Path):
state_Dict = torch.load(checkpoint_Path, map_location= 'cpu')
self.model.load_state_dict(state_Dict['Model'])
self.steps = state_Dict['Steps']
self.epochs = state_Dict['Epochs']
logging.info('Checkpoint loaded at {} steps.'.format(self.steps))
class Trainer:
def __init__(self, steps=0):
self.steps = steps
self.epochs = 0
self.Datset_Generate()
self.Model_Generate()
self.writer = SummaryWriter(hp_Dict['Log_Path'])
if self.steps > 0:
self.Load_Checkpoint()
def Datset_Generate(self):
train_Dataset = Train_Dataset()
dev_Dataset = Dev_Dataset()
logging.info('The number of train files = {}.'.format(
len(train_Dataset)))
logging.info('The number of development files = {}.'.format(
len(dev_Dataset)))
train_Collater = Train_Collater()
dev_Collater = Dev_Collater()
inference_Collater = Inference_Collater()
self.dataLoader_Dict = {}
self.dataLoader_Dict['Train'] = torch.utils.data.DataLoader(
dataset=train_Dataset,
shuffle=True,
collate_fn=train_Collater,
batch_size=hp_Dict['Train']['Batch']['Train']['Speaker'],
num_workers=hp_Dict['Train']['Num_Workers'],
pin_memory=True)
self.dataLoader_Dict['Dev'] = torch.utils.data.DataLoader(
dataset=dev_Dataset,
shuffle=True,
collate_fn=dev_Collater,
batch_size=hp_Dict['Train']['Batch']['Eval']['Speaker'],
num_workers=hp_Dict['Train']['Num_Workers'],
pin_memory=True)
self.dataLoader_Dict['Inference'] = torch.utils.data.DataLoader(
dataset=dev_Dataset,
shuffle=True,
collate_fn=inference_Collater,
batch_size=hp_Dict['Train']['Batch']['Eval']['Speaker'],
num_workers=hp_Dict['Train']['Num_Workers'],
pin_memory=True)
def Model_Generate(self):
self.model = Encoder(
mel_dims=hp_Dict['Sound']['Mel_Dim'],
lstm_size=hp_Dict['Encoder']['LSTM']['Sizes'],
lstm_stacks=hp_Dict['Encoder']['LSTM']['Stacks'],
embedding_size=hp_Dict['Encoder']['Embedding_Size'],
).to(device)
self.criterion = GE2E_Loss().to(device)
self.optimizer = RAdam(
params=self.model.parameters(),
lr=hp_Dict['Train']['Learning_Rate']['Initial'],
eps=hp_Dict['Train']['Learning_Rate']['Epsilon'],
)
self.scheduler = torch.optim.lr_scheduler.StepLR(
optimizer=self.optimizer,
step_size=hp_Dict['Train']['Learning_Rate']['Decay_Step'],
gamma=hp_Dict['Train']['Learning_Rate']['Decay_Rate'],
)
logging.info(self.model)
def Train_Step(self, mels):
mels = mels.to(device)
embeddings = self.model(mels)
loss = self.criterion(
embeddings,
hp_Dict['Train']['Batch']['Train']['Pattern_per_Speaker'], device)
self.optimizer.zero_grad()
loss.backward()
torch.nn.utils.clip_grad_norm_(
parameters=self.model.parameters(),
max_norm=hp_Dict['Train']['Gradient_Norm'])
self.optimizer.step()
self.scheduler.step()
self.steps += 1
self.tqdm.update(1)
self.train_Losses += loss
def Train_Epoch(self):
for mels in self.dataLoader_Dict['Train']:
self.Train_Step(mels)
if self.steps % hp_Dict['Train']['Checkpoint_Save_Interval'] == 0:
self.Save_Checkpoint()
if self.steps % hp_Dict['Train']['Logging_Interval'] == 0:
self.writer.add_scalar(
'train/loss',
self.train_Losses / hp_Dict['Train']['Logging_Interval'],
self.steps)
self.train_Losses = 0.0
if self.steps % hp_Dict['Train']['Evaluation_Interval'] == 0:
self.Evaluation_Epoch()
self.Inference_Epoch()
if self.steps >= hp_Dict['Train']['Max_Step']:
return
self.epochs += 1
@torch.no_grad()
def Evaluation_Step(self, mels):
mels = mels.to(device)
embeddings = self.model(mels)
loss = self.criterion(
embeddings,
hp_Dict['Train']['Batch']['Eval']['Pattern_per_Speaker'], device)
return embeddings, loss
def Evaluation_Epoch(self):
logging.info('(Steps: {}) Start evaluation.'.format(self.steps))
self.model.eval()
embeddings, losses, datasets, speakers = zip(
*[(*self.Evaluation_Step(mels), datasets, speakers)
for step, (
mels, datasets,
speakers) in tqdm(enumerate(self.dataLoader_Dict['Dev'], 1),
desc='[Evaluation]')])
losses = torch.stack(losses)
self.writer.add_scalar('evaluation/loss', losses.sum(), self.steps)
self.TSNE(embeddings=torch.cat(embeddings, dim=0),
datasets=[
dataset for dataset_List in datasets
for dataset in dataset_List
],
speakers=[
speaker for speaker_list in speakers
for speaker in speaker_list
],
tag='evaluation/tsne')
self.model.train()
@torch.no_grad()
def Inference_Step(self, mels):
return Normalize(self.model(mels.to(device)),
samples=hp_Dict['Train']['Inference']['Samples'])
def Inference_Epoch(self):
logging.info('(Steps: {}) Start inference.'.format(self.steps))
self.model.eval()
embeddings, datasets, speakers = zip(
*[(self.Inference_Step(mels), datasets, speakers)
for step, (mels, datasets, speakers) in tqdm(
enumerate(self.dataLoader_Dict['Inference'], 1),
desc='[Inference]')])
self.TSNE(embeddings=torch.cat(embeddings, dim=0),
datasets=[
dataset for dataset_List in datasets
for dataset in dataset_List
],
speakers=[
speaker for speaker_List in speakers
for speaker in speaker_List
],
tag='infernce/tsne')
self.model.train()
def TSNE(self, embeddings, datasets, speakers, tag):
scatters = TSNE(n_components=2, random_state=0).fit_transform(
embeddings[:10 * hp_Dict['Train']['Batch']['Eval']
['Pattern_per_Speaker']].cpu().numpy())
scatters = np.reshape(
scatters,
[-1, hp_Dict['Train']['Batch']['Eval']['Pattern_per_Speaker'], 2])
fig = plt.figure(figsize=(8, 8))
for scatter, dataset, speaker in zip(
scatters, datasets[::hp_Dict['Train']['Batch']['Eval']
['Pattern_per_Speaker']],
speakers[::hp_Dict['Train']['Batch']['Eval']
['Pattern_per_Speaker']]):
plt.scatter(scatter[:, 0],
scatter[:, 1],
label='{}.{}'.format(dataset, speaker))
plt.legend()
plt.tight_layout()
self.writer.add_figure(tag, fig, self.steps)
plt.close(fig)
def Load_Checkpoint(self):
state_Dict = torch.load(os.path.join(
hp_Dict['Checkpoint_Path'],
'S_{}.pkl'.format(self.steps).replace('\\', '/')),
map_location='cpu')
self.model.load_state_dict(state_Dict['Model'])
self.optimizer.load_state_dict(state_Dict['Optimizer'])
self.scheduler.load_state_dict(state_Dict['Scheduler'])
self.steps = state_Dict['Steps']
self.epochs = state_Dict['Epochs']
logging.info('Checkpoint loaded at {} steps.'.format(self.steps))
def Save_Checkpoint(self):
os.makedirs(hp_Dict['Checkpoint_Path'], exist_ok=True)
state_Dict = {
'Model': self.model.state_dict(),
'Optimizer': self.optimizer.state_dict(),
'Scheduler': self.scheduler.state_dict(),
'Steps': self.steps,
'Epochs': self.epochs,
}
torch.save(
state_Dict,
os.path.join(hp_Dict['Checkpoint_Path'],
'S_{}.pkl'.format(self.steps).replace('\\', '/')))
logging.info('Checkpoint saved at {} steps.'.format(self.steps))
def Train(self):
self.tqdm = tqdm(initial=self.steps,
total=hp_Dict['Train']['Max_Step'],
desc='[Training]')
self.train_Losses = 0.0
if hp_Dict['Train']['Initial_Inference'] and self.steps == 0:
self.Evaluation_Epoch()
self.Inference_Epoch()
while self.steps < hp_Dict['Train']['Max_Step']:
try:
self.Train_Epoch()
except KeyboardInterrupt:
self.Save_Checkpoint()
exit(1)
self.tqdm.close()
logging.info('Finished training.')