def train(rank, epoch, hps, generator, optimizer_g, train_loader, logger, writer):
train_loader.sampler.set_epoch(epoch)
global global_step
generator.train()
for batch_idx, (x, x_lengths, y, y_lengths) in enumerate(train_loader):
x, x_lengths = x.cuda(rank, non_blocking=True), x_lengths.cuda(rank, non_blocking=True)
y, y_lengths = y.cuda(rank, non_blocking=True), y_lengths.cuda(rank, non_blocking=True)
# Train Generator
optimizer_g.zero_grad()
(z, y_m, y_logs, logdet), attn, logw, logw_, x_m, x_logs = generator(x, x_lengths, y, y_lengths, gen=False)
l_mle = 0.5 * math.log(2 * math.pi) + (torch.sum(y_logs) + 0.5 * torch.sum(torch.exp(-2 * y_logs) * (z - y_m)**2) - torch.sum(logdet)) / (torch.sum(y_lengths // hps.model.n_sqz) * hps.model.n_sqz * hps.data.n_mel_channels)
l_length = torch.sum((logw - logw_)**2) / torch.sum(x_lengths)
loss_gs = [l_mle, l_length]
loss_g = sum(loss_gs)
if hps.train.fp16_run:
with amp.scale_loss(loss_g, optimizer_g._optim) as scaled_loss:
scaled_loss.backward()
grad_norm = commons.clip_grad_value_(amp.master_params(optimizer_g._optim), 5)
else:
loss_g.backward()
grad_norm = commons.clip_grad_value_(generator.parameters(), 5)
optimizer_g.step()
if rank==0:
if batch_idx % hps.train.log_interval == 0:
(y_gen, *_), *_ = generator.module(x[:1], x_lengths[:1], gen=True)
logger.info('Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f}'.format(
epoch, batch_idx * len(x), len(train_loader.dataset),
100. * batch_idx / len(train_loader),
loss_g.item()))
logger.info([x.item() for x in loss_gs] + [global_step, optimizer_g.get_lr()])
scalar_dict = {"loss/g/total": loss_g, "learning_rate": optimizer_g.get_lr(), "grad_norm": grad_norm}
scalar_dict.update({"loss/g/{}".format(i): v for i, v in enumerate(loss_gs)})
utils.summarize(
writer=writer,
global_step=global_step,
images={"y_org": utils.plot_spectrogram_to_numpy(y[0].data.cpu().numpy()),
"y_gen": utils.plot_spectrogram_to_numpy(y_gen[0].data.cpu().numpy()),
"attn": utils.plot_alignment_to_numpy(attn[0,0].data.cpu().numpy()),
},
scalars=scalar_dict)
global_step += 1
if rank == 0:
logger.info('====> Epoch: {}'.format(epoch))
def train_and_evaluate(rank, epoch, hps, nets, optims, schedulers, scaler, loaders, logger, writers):
net_g, net_d = nets
optim_g, optim_d = optims
scheduler_g, scheduler_d = schedulers
train_loader, eval_loader = loaders
if writers is not None:
writer, writer_eval = writers
train_loader.batch_sampler.set_epoch(epoch)
global global_step
net_g.train()
net_d.train()
for batch_idx, (spec, spec_lengths, y, y_lengths) in enumerate(train_loader):
spec, spec_lengths = spec.cuda(rank, non_blocking=True), spec_lengths.cuda(rank, non_blocking=True)
y, y_lengths = y.cuda(rank, non_blocking=True), y_lengths.cuda(rank, non_blocking=True)
with autocast(enabled=hps.train.fp16_run):
mel = spec_to_mel_torch(
spec,
hps.data.filter_length,
hps.data.n_mel_channels,
hps.data.sampling_rate,
hps.data.mel_fmin,
hps.data.mel_fmax)
# print('check',mel.shape)/
y_hat, ids_slice, x_mask, z_mask,\
(z, z_p, m_p, logs_p, m_q, logs_q) = net_g(mel, spec_lengths, spec, spec_lengths)
# print('check',log_det_j_sum.shape, m_p.shape)
y_mel = commons.slice_segments(mel, ids_slice, hps.train.segment_size // hps.data.hop_length)
y_hat_mel = mel_spectrogram_torch(
y_hat.squeeze(1),
hps.data.filter_length,
hps.data.n_mel_channels,
hps.data.sampling_rate,
hps.data.hop_length,
hps.data.win_length,
hps.data.mel_fmin,
hps.data.mel_fmax
)
y = commons.slice_segments(y, ids_slice * hps.data.hop_length, hps.train.segment_size) # slice
# NDA is effective?
batch_size=y.size(0)
y_jig1 = y.view(batch_size,4,-1)
rand_idx = torch.randperm(4)
y_jig2 = y_jig1[:,rand_idx,:]
y_jigsaw = y_jig2.view(batch_size,1,-1)
# print(rand_idx)
check_idx = torch.tensor([0,1,2,3])
if (rand_idx ==check_idx).sum()==4:
y_jigsaw = y_hat
else:
y_jigsaw = y_jigsaw
y_negative = 0.75*y_hat + 0.25*y_jigsaw
# Discriminator
y_d_hat_r, y_d_hat_g, _, _ = net_d(y, y_negative.detach())
with autocast(enabled=False):
loss_disc, losses_disc_r, losses_disc_g = discriminator_loss(y_d_hat_r, y_d_hat_g)
loss_disc_all = loss_disc
optim_d.zero_grad()
scaler.scale(loss_disc_all).backward()
scaler.unscale_(optim_d)
grad_norm_d = commons.clip_grad_value_(net_d.parameters(), None)
scaler.step(optim_d)
with autocast(enabled=hps.train.fp16_run):
# Generator
y_d_hat_r, y_d_hat_g, fmap_r, fmap_g = net_d(y, y_hat)
with autocast(enabled=False):
loss_mel = F.l1_loss(y_mel, y_hat_mel) * hps.train.c_mel
loss_kl = kl_loss(z_p, logs_q, m_p, logs_p, z_mask) * hps.train.c_kl
loss_fm = feature_loss(fmap_r, fmap_g)
loss_gen, losses_gen = generator_loss(y_d_hat_g)
loss_gen_all = loss_gen + loss_fm + loss_mel + loss_kl
optim_g.zero_grad()
scaler.scale(loss_gen_all).backward()
scaler.unscale_(optim_g)
grad_norm_g = commons.clip_grad_value_(net_g.parameters(), None)
scaler.step(optim_g)
scaler.update()
if rank==0:
if global_step % hps.train.log_interval == 0:
lr = optim_g.param_groups[0]['lr']
losses = [loss_disc, loss_gen, loss_fm, loss_mel, loss_kl]
logger.info('Train Epoch: {} [{:.0f}%]'.format(
epoch,
100. * batch_idx / len(train_loader)))
logger.info([x.item() for x in losses] + [global_step, lr])
scalar_dict = {"loss/g/total": loss_gen_all, "loss/d/total": loss_disc_all, "learning_rate": lr, "grad_norm_d": grad_norm_d, "grad_norm_g": grad_norm_g}
scalar_dict.update({"loss/g/fm": loss_fm, "loss/g/mel": loss_mel, "loss/g/kl": loss_kl})
scalar_dict.update({"loss/g/{}".format(i): v for i, v in enumerate(losses_gen)})
scalar_dict.update({"loss/d_r/{}".format(i): v for i, v in enumerate(losses_disc_r)})
scalar_dict.update({"loss/d_g/{}".format(i): v for i, v in enumerate(losses_disc_g)})
image_dict = {
"slice/mel_org": utils.plot_spectrogram_to_numpy(y_mel[0].data.cpu().numpy()),
"slice/mel_gen": utils.plot_spectrogram_to_numpy(y_hat_mel[0].data.cpu().numpy()),
"all/mel": utils.plot_spectrogram_to_numpy(mel[0].data.cpu().numpy()),
}
utils.summarize(
writer=writer,
global_step=global_step,
images=image_dict,
scalars=scalar_dict)
if global_step % hps.train.eval_interval == 0:
evaluate(hps, net_g, eval_loader, writer_eval)
utils.save_checkpoint(net_g, optim_g, hps.train.learning_rate, epoch, os.path.join(hps.model_dir, "G_{}.pth".format(global_step)))
utils.save_checkpoint(net_d, optim_d, hps.train.learning_rate, epoch, os.path.join(hps.model_dir, "D_{}.pth".format(global_step)))
global_step += 1
if rank == 0:
logger.info('====> Epoch: {}'.format(epoch))
