def test_in_out():
layer = Decoder(
in_channels=256,
frame_channels=80,
r=2,
memory_size=4,
attn_windowing=False,
attn_norm="sigmoid",
attn_K=5,
attn_type="original",
prenet_type="original",
prenet_dropout=True,
forward_attn=True,
trans_agent=True,
forward_attn_mask=True,
location_attn=True,
separate_stopnet=True,
)
dummy_input = T.rand(4, 8, 256)
dummy_memory = T.rand(4, 2, 80)
output, alignment, stop_tokens = layer(dummy_input,
dummy_memory,
mask=None)
assert output.shape[0] == 4
assert output.shape[1] == 80, "size not {}".format(output.shape[1])
assert output.shape[2] == 2, "size not {}".format(output.shape[2])
assert stop_tokens.shape[0] == 4
def __init__(
self,
config: "TacotronConfig",
ap: "AudioProcessor" = None,
tokenizer: "TTSTokenizer" = None,
speaker_manager: SpeakerManager = None,
):
super().__init__(config, ap, tokenizer, speaker_manager)
# pass all config fields to `self`
# for fewer code change
for key in config:
setattr(self, key, config[key])
# set speaker embedding channel size for determining `in_channels` for the connected layers.
# `init_multispeaker` needs to be called once more in training to initialize the speaker embedding layer based
# on the number of speakers infered from the dataset.
if self.use_speaker_embedding or self.use_d_vector_file:
self.init_multispeaker(config)
self.decoder_in_features += self.embedded_speaker_dim # add speaker embedding dim
if self.use_gst:
self.decoder_in_features += self.gst.gst_embedding_dim
if self.use_capacitron_vae:
self.decoder_in_features += self.capacitron_vae.capacitron_VAE_embedding_dim
# embedding layer
self.embedding = nn.Embedding(self.num_chars, 256, padding_idx=0)
self.embedding.weight.data.normal_(0, 0.3)
# base model layers
self.encoder = Encoder(self.encoder_in_features)
self.decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
self.postnet = PostCBHG(self.decoder_output_dim)
self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2,
self.out_channels)
# setup prenet dropout
self.decoder.prenet.dropout_at_inference = self.prenet_dropout_at_inference
# global style token layers
if self.gst and self.use_gst:
self.gst_layer = GST(
num_mel=self.decoder_output_dim,
num_heads=self.gst.gst_num_heads,
num_style_tokens=self.gst.gst_num_style_tokens,
gst_embedding_dim=self.gst.gst_embedding_dim,
)
# Capacitron layers
if self.capacitron_vae and self.use_capacitron_vae:
self.capacitron_vae_layer = CapacitronVAE(
num_mel=self.decoder_output_dim,
encoder_output_dim=self.encoder_in_features,
capacitron_VAE_embedding_dim=self.capacitron_vae.
capacitron_VAE_embedding_dim,
speaker_embedding_dim=self.embedded_speaker_dim
if self.use_speaker_embedding and
self.capacitron_vae.capacitron_use_speaker_embedding else None,
text_summary_embedding_dim=self.capacitron_vae.
capacitron_text_summary_embedding_dim
if self.capacitron_vae.capacitron_use_text_summary_embeddings
else None,
)
# backward pass decoder
if self.bidirectional_decoder:
self._init_backward_decoder()
# setup DDC
if self.double_decoder_consistency:
self.coarse_decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.ddc_r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
class Tacotron(BaseTacotron):
"""Tacotron as in https://arxiv.org/abs/1703.10135
It's an autoregressive encoder-attention-decoder-postnet architecture.
Check `TacotronConfig` for the arguments.
Args:
config (TacotronConfig): Configuration for the Tacotron model.
speaker_manager (SpeakerManager): Speaker manager to handle multi-speaker settings. Only use if the model is
a multi-speaker model. Defaults to None.
"""
def __init__(
self,
config: "TacotronConfig",
ap: "AudioProcessor" = None,
tokenizer: "TTSTokenizer" = None,
speaker_manager: SpeakerManager = None,
):
super().__init__(config, ap, tokenizer, speaker_manager)
# pass all config fields to `self`
# for fewer code change
for key in config:
setattr(self, key, config[key])
# set speaker embedding channel size for determining `in_channels` for the connected layers.
# `init_multispeaker` needs to be called once more in training to initialize the speaker embedding layer based
# on the number of speakers infered from the dataset.
if self.use_speaker_embedding or self.use_d_vector_file:
self.init_multispeaker(config)
self.decoder_in_features += self.embedded_speaker_dim # add speaker embedding dim
if self.use_gst:
self.decoder_in_features += self.gst.gst_embedding_dim
if self.use_capacitron_vae:
self.decoder_in_features += self.capacitron_vae.capacitron_VAE_embedding_dim
# embedding layer
self.embedding = nn.Embedding(self.num_chars, 256, padding_idx=0)
self.embedding.weight.data.normal_(0, 0.3)
# base model layers
self.encoder = Encoder(self.encoder_in_features)
self.decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
self.postnet = PostCBHG(self.decoder_output_dim)
self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2,
self.out_channels)
# setup prenet dropout
self.decoder.prenet.dropout_at_inference = self.prenet_dropout_at_inference
# global style token layers
if self.gst and self.use_gst:
self.gst_layer = GST(
num_mel=self.decoder_output_dim,
num_heads=self.gst.gst_num_heads,
num_style_tokens=self.gst.gst_num_style_tokens,
gst_embedding_dim=self.gst.gst_embedding_dim,
)
# Capacitron layers
if self.capacitron_vae and self.use_capacitron_vae:
self.capacitron_vae_layer = CapacitronVAE(
num_mel=self.decoder_output_dim,
encoder_output_dim=self.encoder_in_features,
capacitron_VAE_embedding_dim=self.capacitron_vae.
capacitron_VAE_embedding_dim,
speaker_embedding_dim=self.embedded_speaker_dim
if self.use_speaker_embedding and
self.capacitron_vae.capacitron_use_speaker_embedding else None,
text_summary_embedding_dim=self.capacitron_vae.
capacitron_text_summary_embedding_dim
if self.capacitron_vae.capacitron_use_text_summary_embeddings
else None,
)
# backward pass decoder
if self.bidirectional_decoder:
self._init_backward_decoder()
# setup DDC
if self.double_decoder_consistency:
self.coarse_decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.ddc_r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
def forward( # pylint: disable=dangerous-default-value
self,
text,
text_lengths,
mel_specs=None,
mel_lengths=None,
aux_input={
"speaker_ids": None,
"d_vectors": None
}):
"""
Shapes:
text: [B, T_in]
text_lengths: [B]
mel_specs: [B, T_out, C]
mel_lengths: [B]
aux_input: 'speaker_ids': [B, 1] and 'd_vectors':[B, C]
"""
aux_input = self._format_aux_input(aux_input)
outputs = {
"alignments_backward": None,
"decoder_outputs_backward": None
}
inputs = self.embedding(text)
input_mask, output_mask = self.compute_masks(text_lengths, mel_lengths)
# B x T_in x encoder_in_features
encoder_outputs = self.encoder(inputs)
# sequence masking
encoder_outputs = encoder_outputs * input_mask.unsqueeze(2).expand_as(
encoder_outputs)
# global style token
if self.gst and self.use_gst:
# B x gst_dim
encoder_outputs = self.compute_gst(encoder_outputs, mel_specs)
# speaker embedding
if self.use_speaker_embedding or self.use_d_vector_file:
if not self.use_d_vector_file:
# B x 1 x speaker_embed_dim
embedded_speakers = self.speaker_embedding(
aux_input["speaker_ids"])[:, None]
else:
# B x 1 x speaker_embed_dim
embedded_speakers = torch.unsqueeze(aux_input["d_vectors"], 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, embedded_speakers)
# Capacitron
if self.capacitron_vae and self.use_capacitron_vae:
# B x capacitron_VAE_embedding_dim
encoder_outputs, *capacitron_vae_outputs = self.compute_capacitron_VAE_embedding(
encoder_outputs,
reference_mel_info=[mel_specs, mel_lengths],
text_info=[inputs, text_lengths]
if self.capacitron_vae.capacitron_use_text_summary_embeddings
else None,
speaker_embedding=embedded_speakers if
self.capacitron_vae.capacitron_use_speaker_embedding else None,
)
else:
capacitron_vae_outputs = None
# decoder_outputs: B x decoder_in_features x T_out
# alignments: B x T_in x encoder_in_features
# stop_tokens: B x T_in
decoder_outputs, alignments, stop_tokens = self.decoder(
encoder_outputs, mel_specs, input_mask)
# sequence masking
if output_mask is not None:
decoder_outputs = decoder_outputs * output_mask.unsqueeze(
1).expand_as(decoder_outputs)
# B x T_out x decoder_in_features
postnet_outputs = self.postnet(decoder_outputs)
# sequence masking
if output_mask is not None:
postnet_outputs = postnet_outputs * output_mask.unsqueeze(
2).expand_as(postnet_outputs)
# B x T_out x posnet_dim
postnet_outputs = self.last_linear(postnet_outputs)
# B x T_out x decoder_in_features
decoder_outputs = decoder_outputs.transpose(1, 2).contiguous()
if self.bidirectional_decoder:
decoder_outputs_backward, alignments_backward = self._backward_pass(
mel_specs, encoder_outputs, input_mask)
outputs["alignments_backward"] = alignments_backward
outputs["decoder_outputs_backward"] = decoder_outputs_backward
if self.double_decoder_consistency:
decoder_outputs_backward, alignments_backward = self._coarse_decoder_pass(
mel_specs, encoder_outputs, alignments, input_mask)
outputs["alignments_backward"] = alignments_backward
outputs["decoder_outputs_backward"] = decoder_outputs_backward
outputs.update({
"model_outputs": postnet_outputs,
"decoder_outputs": decoder_outputs,
"alignments": alignments,
"stop_tokens": stop_tokens,
"capacitron_vae_outputs": capacitron_vae_outputs,
})
return outputs
@torch.no_grad()
def inference(self, text_input, aux_input=None):
aux_input = self._format_aux_input(aux_input)
inputs = self.embedding(text_input)
encoder_outputs = self.encoder(inputs)
if self.gst and self.use_gst:
# B x gst_dim
encoder_outputs = self.compute_gst(encoder_outputs,
aux_input["style_mel"],
aux_input["d_vectors"])
if self.capacitron_vae and self.use_capacitron_vae:
if aux_input["style_text"] is not None:
style_text_embedding = self.embedding(aux_input["style_text"])
style_text_length = torch.tensor(
[style_text_embedding.size(1)],
dtype=torch.int64).to(encoder_outputs.device) # pylint: disable=not-callable
reference_mel_length = (
torch.tensor([aux_input["style_mel"].size(1)],
dtype=torch.int64).to(encoder_outputs.device)
if aux_input["style_mel"] is not None else None) # pylint: disable=not-callable
# B x capacitron_VAE_embedding_dim
encoder_outputs, *_ = self.compute_capacitron_VAE_embedding(
encoder_outputs,
reference_mel_info=[
aux_input["style_mel"], reference_mel_length
] if aux_input["style_mel"] is not None else None,
text_info=[style_text_embedding, style_text_length]
if aux_input["style_text"] is not None else None,
speaker_embedding=aux_input["d_vectors"] if
self.capacitron_vae.capacitron_use_speaker_embedding else None,
)
if self.num_speakers > 1:
if not self.use_d_vector_file:
# B x 1 x speaker_embed_dim
embedded_speakers = self.speaker_embedding(
aux_input["speaker_ids"])
# reshape embedded_speakers
if embedded_speakers.ndim == 1:
embedded_speakers = embedded_speakers[None, None, :]
elif embedded_speakers.ndim == 2:
embedded_speakers = embedded_speakers[None, :]
else:
# B x 1 x speaker_embed_dim
embedded_speakers = torch.unsqueeze(aux_input["d_vectors"], 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, embedded_speakers)
decoder_outputs, alignments, stop_tokens = self.decoder.inference(
encoder_outputs)
postnet_outputs = self.postnet(decoder_outputs)
postnet_outputs = self.last_linear(postnet_outputs)
decoder_outputs = decoder_outputs.transpose(1, 2)
outputs = {
"model_outputs": postnet_outputs,
"decoder_outputs": decoder_outputs,
"alignments": alignments,
"stop_tokens": stop_tokens,
}
return outputs
def before_backward_pass(self, loss_dict, optimizer) -> None:
# Extracting custom training specific operations for capacitron
# from the trainer
if self.use_capacitron_vae:
loss_dict["capacitron_vae_beta_loss"].backward()
optimizer.first_step()
def train_step(self, batch: Dict,
criterion: torch.nn.Module) -> Tuple[Dict, Dict]:
"""Perform a single training step by fetching the right set of samples from the batch.
Args:
batch ([Dict]): A dictionary of input tensors.
criterion ([torch.nn.Module]): Callable criterion to compute model loss.
"""
text_input = batch["text_input"]
text_lengths = batch["text_lengths"]
mel_input = batch["mel_input"]
mel_lengths = batch["mel_lengths"]
linear_input = batch["linear_input"]
stop_targets = batch["stop_targets"]
stop_target_lengths = batch["stop_target_lengths"]
speaker_ids = batch["speaker_ids"]
d_vectors = batch["d_vectors"]
aux_input = {"speaker_ids": speaker_ids, "d_vectors": d_vectors}
outputs = self.forward(text_input, text_lengths, mel_input,
mel_lengths, aux_input)
# set the [alignment] lengths wrt reduction factor for guided attention
if mel_lengths.max() % self.decoder.r != 0:
alignment_lengths = (
mel_lengths +
(self.decoder.r -
(mel_lengths.max() % self.decoder.r))) // self.decoder.r
else:
alignment_lengths = mel_lengths // self.decoder.r
# compute loss
with autocast(enabled=False): # use float32 for the criterion
loss_dict = criterion(
outputs["model_outputs"].float(),
outputs["decoder_outputs"].float(),
mel_input.float(),
linear_input.float(),
outputs["stop_tokens"].float(),
stop_targets.float(),
stop_target_lengths,
outputs["capacitron_vae_outputs"]
if self.capacitron_vae else None,
mel_lengths,
None if outputs["decoder_outputs_backward"] is None else
outputs["decoder_outputs_backward"].float(),
outputs["alignments"].float(),
alignment_lengths,
None if outputs["alignments_backward"] is None else
outputs["alignments_backward"].float(),
text_lengths,
)
# compute alignment error (the lower the better )
align_error = 1 - alignment_diagonal_score(outputs["alignments"])
loss_dict["align_error"] = align_error
return outputs, loss_dict
def get_optimizer(self) -> List:
if self.use_capacitron_vae:
return CapacitronOptimizer(self.config, self.named_parameters())
return get_optimizer(self.config.optimizer,
self.config.optimizer_params, self.config.lr,
self)
def get_scheduler(self, optimizer: object):
opt = optimizer.primary_optimizer if self.use_capacitron_vae else optimizer
return get_scheduler(self.config.lr_scheduler,
self.config.lr_scheduler_params, opt)
def before_gradient_clipping(self):
if self.use_capacitron_vae:
# Capacitron model specific gradient clipping
model_params_to_clip = []
for name, param in self.named_parameters():
if param.requires_grad:
if name != "capacitron_vae_layer.beta":
model_params_to_clip.append(param)
torch.nn.utils.clip_grad_norm_(
model_params_to_clip, self.capacitron_vae.capacitron_grad_clip)
def _create_logs(self, batch, outputs, ap):
postnet_outputs = outputs["model_outputs"]
decoder_outputs = outputs["decoder_outputs"]
alignments = outputs["alignments"]
alignments_backward = outputs["alignments_backward"]
mel_input = batch["mel_input"]
linear_input = batch["linear_input"]
pred_linear_spec = postnet_outputs[0].data.cpu().numpy()
pred_mel_spec = decoder_outputs[0].data.cpu().numpy()
gt_linear_spec = linear_input[0].data.cpu().numpy()
gt_mel_spec = mel_input[0].data.cpu().numpy()
align_img = alignments[0].data.cpu().numpy()
figures = {
"pred_linear_spec":
plot_spectrogram(pred_linear_spec, ap, output_fig=False),
"real_linear_spec":
plot_spectrogram(gt_linear_spec, ap, output_fig=False),
"pred_mel_spec":
plot_spectrogram(pred_mel_spec, ap, output_fig=False),
"real_mel_spec":
plot_spectrogram(gt_mel_spec, ap, output_fig=False),
"alignment":
plot_alignment(align_img, output_fig=False),
}
if self.bidirectional_decoder or self.double_decoder_consistency:
figures["alignment_backward"] = plot_alignment(
alignments_backward[0].data.cpu().numpy(), output_fig=False)
# Sample audio
audio = ap.inv_spectrogram(pred_linear_spec.T)
return figures, {"audio": audio}
def train_log(self, batch: dict, outputs: dict, logger: "Logger",
assets: dict, steps: int) -> None: # pylint: disable=no-self-use
figures, audios = self._create_logs(batch, outputs, self.ap)
logger.train_figures(steps, figures)
logger.train_audios(steps, audios, self.ap.sample_rate)
def eval_step(self, batch: dict, criterion: nn.Module):
return self.train_step(batch, criterion)
def eval_log(self, batch: dict, outputs: dict, logger: "Logger",
assets: dict, steps: int) -> None:
figures, audios = self._create_logs(batch, outputs, self.ap)
logger.eval_figures(steps, figures)
logger.eval_audios(steps, audios, self.ap.sample_rate)
@staticmethod
def init_from_config(config: "TacotronConfig",
samples: Union[List[List], List[Dict]] = None):
"""Initiate model from config
Args:
config (TacotronConfig): Model config.
samples (Union[List[List], List[Dict]]): Training samples to parse speaker ids for training.
Defaults to None.
"""
from TTS.utils.audio import AudioProcessor
ap = AudioProcessor.init_from_config(config)
tokenizer, new_config = TTSTokenizer.init_from_config(config)
speaker_manager = SpeakerManager.init_from_config(config, samples)
return Tacotron(new_config, ap, tokenizer, speaker_manager)
class Tacotron(BaseTacotron):
"""Tacotron as in https://arxiv.org/abs/1703.10135
It's an autoregressive encoder-attention-decoder-postnet architecture.
Check `TacotronConfig` for the arguments.
"""
def __init__(self, config: Coqpit):
super().__init__(config)
chars, self.config = self.get_characters(config)
config.num_chars = self.num_chars = len(chars)
# pass all config fields to `self`
# for fewer code change
for key in config:
setattr(self, key, config[key])
# set speaker embedding channel size for determining `in_channels` for the connected layers.
# `init_multispeaker` needs to be called once more in training to initialize the speaker embedding layer based
# on the number of speakers infered from the dataset.
if self.use_speaker_embedding or self.use_d_vector_file:
self.init_multispeaker(config)
self.decoder_in_features += self.embedded_speaker_dim # add speaker embedding dim
if self.use_gst:
self.decoder_in_features += self.gst.gst_embedding_dim
# embedding layer
self.embedding = nn.Embedding(self.num_chars, 256, padding_idx=0)
self.embedding.weight.data.normal_(0, 0.3)
# base model layers
self.encoder = Encoder(self.encoder_in_features)
self.decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
self.postnet = PostCBHG(self.decoder_output_dim)
self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2,
self.out_channels)
# setup prenet dropout
self.decoder.prenet.dropout_at_inference = self.prenet_dropout_at_inference
# global style token layers
if self.gst and self.use_gst:
self.gst_layer = GST(
num_mel=self.decoder_output_dim,
num_heads=self.gst.gst_num_heads,
num_style_tokens=self.gst.gst_num_style_tokens,
gst_embedding_dim=self.gst.gst_embedding_dim,
)
# backward pass decoder
if self.bidirectional_decoder:
self._init_backward_decoder()
# setup DDC
if self.double_decoder_consistency:
self.coarse_decoder = Decoder(
self.decoder_in_features,
self.decoder_output_dim,
self.ddc_r,
self.memory_size,
self.attention_type,
self.windowing,
self.attention_norm,
self.prenet_type,
self.prenet_dropout,
self.use_forward_attn,
self.transition_agent,
self.forward_attn_mask,
self.location_attn,
self.attention_heads,
self.separate_stopnet,
self.max_decoder_steps,
)
def forward( # pylint: disable=dangerous-default-value
self,
text,
text_lengths,
mel_specs=None,
mel_lengths=None,
aux_input={
"speaker_ids": None,
"d_vectors": None
}):
"""
Shapes:
text: [B, T_in]
text_lengths: [B]
mel_specs: [B, T_out, C]
mel_lengths: [B]
aux_input: 'speaker_ids': [B, 1] and 'd_vectors':[B, C]
"""
aux_input = self._format_aux_input(aux_input)
outputs = {
"alignments_backward": None,
"decoder_outputs_backward": None
}
inputs = self.embedding(text)
input_mask, output_mask = self.compute_masks(text_lengths, mel_lengths)
# B x T_in x encoder_in_features
encoder_outputs = self.encoder(inputs)
# sequence masking
encoder_outputs = encoder_outputs * input_mask.unsqueeze(2).expand_as(
encoder_outputs)
# global style token
if self.gst and self.use_gst:
# B x gst_dim
encoder_outputs = self.compute_gst(encoder_outputs, mel_specs)
# speaker embedding
if self.use_speaker_embedding or self.use_d_vector_file:
if not self.use_d_vector_file:
# B x 1 x speaker_embed_dim
embedded_speakers = self.speaker_embedding(
aux_input["speaker_ids"])[:, None]
else:
# B x 1 x speaker_embed_dim
embedded_speakers = torch.unsqueeze(aux_input["d_vectors"], 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, embedded_speakers)
# decoder_outputs: B x decoder_in_features x T_out
# alignments: B x T_in x encoder_in_features
# stop_tokens: B x T_in
decoder_outputs, alignments, stop_tokens = self.decoder(
encoder_outputs, mel_specs, input_mask)
# sequence masking
if output_mask is not None:
decoder_outputs = decoder_outputs * output_mask.unsqueeze(
1).expand_as(decoder_outputs)
# B x T_out x decoder_in_features
postnet_outputs = self.postnet(decoder_outputs)
# sequence masking
if output_mask is not None:
postnet_outputs = postnet_outputs * output_mask.unsqueeze(
2).expand_as(postnet_outputs)
# B x T_out x posnet_dim
postnet_outputs = self.last_linear(postnet_outputs)
# B x T_out x decoder_in_features
decoder_outputs = decoder_outputs.transpose(1, 2).contiguous()
if self.bidirectional_decoder:
decoder_outputs_backward, alignments_backward = self._backward_pass(
mel_specs, encoder_outputs, input_mask)
outputs["alignments_backward"] = alignments_backward
outputs["decoder_outputs_backward"] = decoder_outputs_backward
if self.double_decoder_consistency:
decoder_outputs_backward, alignments_backward = self._coarse_decoder_pass(
mel_specs, encoder_outputs, alignments, input_mask)
outputs["alignments_backward"] = alignments_backward
outputs["decoder_outputs_backward"] = decoder_outputs_backward
outputs.update({
"model_outputs": postnet_outputs,
"decoder_outputs": decoder_outputs,
"alignments": alignments,
"stop_tokens": stop_tokens,
})
return outputs
@torch.no_grad()
def inference(self, text_input, aux_input=None):
aux_input = self._format_aux_input(aux_input)
inputs = self.embedding(text_input)
encoder_outputs = self.encoder(inputs)
if self.gst and self.use_gst:
# B x gst_dim
encoder_outputs = self.compute_gst(encoder_outputs,
aux_input["style_mel"],
aux_input["d_vectors"])
if self.num_speakers > 1:
if not self.use_d_vector_file:
# B x 1 x speaker_embed_dim
embedded_speakers = self.speaker_embedding(
aux_input["speaker_ids"])
# reshape embedded_speakers
if embedded_speakers.ndim == 1:
embedded_speakers = embedded_speakers[None, None, :]
elif embedded_speakers.ndim == 2:
embedded_speakers = embedded_speakers[None, :]
else:
# B x 1 x speaker_embed_dim
embedded_speakers = torch.unsqueeze(aux_input["d_vectors"], 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, embedded_speakers)
decoder_outputs, alignments, stop_tokens = self.decoder.inference(
encoder_outputs)
postnet_outputs = self.postnet(decoder_outputs)
postnet_outputs = self.last_linear(postnet_outputs)
decoder_outputs = decoder_outputs.transpose(1, 2)
outputs = {
"model_outputs": postnet_outputs,
"decoder_outputs": decoder_outputs,
"alignments": alignments,
"stop_tokens": stop_tokens,
}
return outputs
def train_step(self, batch, criterion):
"""Perform a single training step by fetching the right set if samples from the batch.
Args:
batch ([type]): [description]
criterion ([type]): [description]
"""
text_input = batch["text_input"]
text_lengths = batch["text_lengths"]
mel_input = batch["mel_input"]
mel_lengths = batch["mel_lengths"]
linear_input = batch["linear_input"]
stop_targets = batch["stop_targets"]
stop_target_lengths = batch["stop_target_lengths"]
speaker_ids = batch["speaker_ids"]
d_vectors = batch["d_vectors"]
# forward pass model
outputs = self.forward(
text_input,
text_lengths,
mel_input,
mel_lengths,
aux_input={
"speaker_ids": speaker_ids,
"d_vectors": d_vectors
},
)
# set the [alignment] lengths wrt reduction factor for guided attention
if mel_lengths.max() % self.decoder.r != 0:
alignment_lengths = (
mel_lengths +
(self.decoder.r -
(mel_lengths.max() % self.decoder.r))) // self.decoder.r
else:
alignment_lengths = mel_lengths // self.decoder.r
aux_input = {"speaker_ids": speaker_ids, "d_vectors": d_vectors}
outputs = self.forward(text_input, text_lengths, mel_input,
mel_lengths, aux_input)
# compute loss
loss_dict = criterion(
outputs["model_outputs"],
outputs["decoder_outputs"],
mel_input,
linear_input,
outputs["stop_tokens"],
stop_targets,
stop_target_lengths,
mel_lengths,
outputs["decoder_outputs_backward"],
outputs["alignments"],
alignment_lengths,
outputs["alignments_backward"],
text_lengths,
)
# compute alignment error (the lower the better )
align_error = 1 - alignment_diagonal_score(outputs["alignments"])
loss_dict["align_error"] = align_error
return outputs, loss_dict
def train_log(self, ap: AudioProcessor, batch: dict,
outputs: dict) -> Tuple[Dict, Dict]:
postnet_outputs = outputs["model_outputs"]
alignments = outputs["alignments"]
alignments_backward = outputs["alignments_backward"]
mel_input = batch["mel_input"]
pred_spec = postnet_outputs[0].data.cpu().numpy()
gt_spec = mel_input[0].data.cpu().numpy()
align_img = alignments[0].data.cpu().numpy()
figures = {
"prediction": plot_spectrogram(pred_spec, ap, output_fig=False),
"ground_truth": plot_spectrogram(gt_spec, ap, output_fig=False),
"alignment": plot_alignment(align_img, output_fig=False),
}
if self.bidirectional_decoder or self.double_decoder_consistency:
figures["alignment_backward"] = plot_alignment(
alignments_backward[0].data.cpu().numpy(), output_fig=False)
# Sample audio
train_audio = ap.inv_spectrogram(pred_spec.T)
return figures, {"audio": train_audio}
def eval_step(self, batch, criterion):
return self.train_step(batch, criterion)
def eval_log(self, ap, batch, outputs):
return self.train_log(ap, batch, outputs)
class Tacotron(TacotronAbstract):
"""Tacotron as in https://arxiv.org/abs/1703.10135
It's an autoregressive encoder-attention-decoder-postnet architecture.
Args:
num_chars (int): number of input characters to define the size of embedding layer.
num_speakers (int): number of speakers in the dataset. >1 enables multi-speaker training and model learns speaker embeddings.
r (int): initial model reduction rate.
postnet_output_dim (int, optional): postnet output channels. Defaults to 80.
decoder_output_dim (int, optional): decoder output channels. Defaults to 80.
attn_type (str, optional): attention type. Check ```TTS.tts.layers.attentions.init_attn```. Defaults to 'original'.
attn_win (bool, optional): enable/disable attention windowing.
It especially useful at inference to keep attention alignment diagonal. Defaults to False.
attn_norm (str, optional): Attention normalization method. "sigmoid" or "softmax". Defaults to "softmax".
prenet_type (str, optional): prenet type for the decoder. Defaults to "original".
prenet_dropout (bool, optional): prenet dropout rate. Defaults to True.
forward_attn (bool, optional): enable/disable forward attention.
It is only valid if ```attn_type``` is ```original```. Defaults to False.
trans_agent (bool, optional): enable/disable transition agent in forward attention. Defaults to False.
forward_attn_mask (bool, optional): enable/disable extra masking over forward attention. Defaults to False.
location_attn (bool, optional): enable/disable location sensitive attention.
It is only valid if ```attn_type``` is ```original```. Defaults to True.
attn_K (int, optional): Number of attention heads for GMM attention. Defaults to 5.
separate_stopnet (bool, optional): enable/disable separate stopnet training without only gradient
flow from stopnet to the rest of the model. Defaults to True.
bidirectional_decoder (bool, optional): enable/disable bidirectional decoding. Defaults to False.
double_decoder_consistency (bool, optional): enable/disable double decoder consistency. Defaults to False.
ddc_r (int, optional): reduction rate for the coarse decoder of double decoder consistency. Defaults to None.
encoder_in_features (int, optional): input channels for the encoder. Defaults to 512.
decoder_in_features (int, optional): input channels for the decoder. Defaults to 512.
speaker_embedding_dim (int, optional): external speaker conditioning vector channels. Defaults to None.
gst (bool, optional): enable/disable global style token learning. Defaults to False.
gst_embedding_dim (int, optional): size of channels for GST vectors. Defaults to 512.
gst_num_heads (int, optional): number of attention heads for GST. Defaults to 4.
gst_style_tokens (int, optional): number of GST tokens. Defaults to 10.
gst_use_speaker_embedding (bool, optional): enable/disable inputing speaker embedding to GST. Defaults to False.
memory_size (int, optional): size of the history queue fed to the prenet. Model feeds the last ```memory_size```
output frames to the prenet.
"""
def __init__(self,
num_chars,
num_speakers,
r=5,
postnet_output_dim=1025,
decoder_output_dim=80,
attn_type='original',
attn_win=False,
attn_norm="sigmoid",
prenet_type="original",
prenet_dropout=True,
forward_attn=False,
trans_agent=False,
forward_attn_mask=False,
location_attn=True,
attn_K=5,
separate_stopnet=True,
bidirectional_decoder=False,
double_decoder_consistency=False,
ddc_r=None,
encoder_in_features=256,
decoder_in_features=256,
speaker_embedding_dim=None,
gst=False,
gst_embedding_dim=256,
gst_num_heads=4,
gst_style_tokens=10,
memory_size=5,
gst_use_speaker_embedding=False):
super(Tacotron, self).__init__(
num_chars, num_speakers, r, postnet_output_dim, decoder_output_dim,
attn_type, attn_win, attn_norm, prenet_type, prenet_dropout,
forward_attn, trans_agent, forward_attn_mask, location_attn,
attn_K, separate_stopnet, bidirectional_decoder,
double_decoder_consistency, ddc_r, encoder_in_features,
decoder_in_features, speaker_embedding_dim, gst, gst_embedding_dim,
gst_num_heads, gst_style_tokens, gst_use_speaker_embedding)
# speaker embedding layers
if self.num_speakers > 1:
if not self.embeddings_per_sample:
speaker_embedding_dim = 256
self.speaker_embedding = nn.Embedding(self.num_speakers,
speaker_embedding_dim)
self.speaker_embedding.weight.data.normal_(0, 0.3)
# speaker and gst embeddings is concat in decoder input
if self.num_speakers > 1:
self.decoder_in_features += speaker_embedding_dim # add speaker embedding dim
# embedding layer
self.embedding = nn.Embedding(num_chars, 256, padding_idx=0)
self.embedding.weight.data.normal_(0, 0.3)
# base model layers
self.encoder = Encoder(self.encoder_in_features)
self.decoder = Decoder(self.decoder_in_features, decoder_output_dim, r,
memory_size, attn_type, attn_win, attn_norm,
prenet_type, prenet_dropout, forward_attn,
trans_agent, forward_attn_mask, location_attn,
attn_K, separate_stopnet)
self.postnet = PostCBHG(decoder_output_dim)
self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2,
postnet_output_dim)
# global style token layers
if self.gst:
self.gst_layer = GST(num_mel=80,
num_heads=gst_num_heads,
num_style_tokens=gst_style_tokens,
gst_embedding_dim=self.gst_embedding_dim,
speaker_embedding_dim=speaker_embedding_dim
if self.embeddings_per_sample
and self.gst_use_speaker_embedding else None)
# backward pass decoder
if self.bidirectional_decoder:
self._init_backward_decoder()
# setup DDC
if self.double_decoder_consistency:
self.coarse_decoder = Decoder(
self.decoder_in_features, decoder_output_dim, ddc_r,
memory_size, attn_type, attn_win, attn_norm, prenet_type,
prenet_dropout, forward_attn, trans_agent, forward_attn_mask,
location_attn, attn_K, separate_stopnet)
def forward(self,
characters,
text_lengths,
mel_specs,
mel_lengths=None,
speaker_ids=None,
speaker_embeddings=None):
"""
Shapes:
characters: [B, T_in]
text_lengths: [B]
mel_specs: [B, T_out, C]
mel_lengths: [B]
speaker_ids: [B, 1]
speaker_embeddings: [B, C]
"""
input_mask, output_mask = self.compute_masks(text_lengths, mel_lengths)
# B x T_in x embed_dim
inputs = self.embedding(characters)
# B x T_in x encoder_in_features
encoder_outputs = self.encoder(inputs)
# sequence masking
encoder_outputs = encoder_outputs * input_mask.unsqueeze(2).expand_as(
encoder_outputs)
# global style token
if self.gst:
# B x gst_dim
encoder_outputs = self.compute_gst(
encoder_outputs, mel_specs,
speaker_embeddings if self.gst_use_speaker_embedding else None)
# speaker embedding
if self.num_speakers > 1:
if not self.embeddings_per_sample:
# B x 1 x speaker_embed_dim
speaker_embeddings = self.speaker_embedding(speaker_ids)[:,
None]
else:
# B x 1 x speaker_embed_dim
speaker_embeddings = torch.unsqueeze(speaker_embeddings, 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, speaker_embeddings)
# decoder_outputs: B x decoder_in_features x T_out
# alignments: B x T_in x encoder_in_features
# stop_tokens: B x T_in
decoder_outputs, alignments, stop_tokens = self.decoder(
encoder_outputs, mel_specs, input_mask)
# sequence masking
if output_mask is not None:
decoder_outputs = decoder_outputs * output_mask.unsqueeze(
1).expand_as(decoder_outputs)
# B x T_out x decoder_in_features
postnet_outputs = self.postnet(decoder_outputs)
# sequence masking
if output_mask is not None:
postnet_outputs = postnet_outputs * output_mask.unsqueeze(
2).expand_as(postnet_outputs)
# B x T_out x posnet_dim
postnet_outputs = self.last_linear(postnet_outputs)
# B x T_out x decoder_in_features
decoder_outputs = decoder_outputs.transpose(1, 2).contiguous()
if self.bidirectional_decoder:
decoder_outputs_backward, alignments_backward = self._backward_pass(
mel_specs, encoder_outputs, input_mask)
return decoder_outputs, postnet_outputs, alignments, stop_tokens, decoder_outputs_backward, alignments_backward
if self.double_decoder_consistency:
decoder_outputs_backward, alignments_backward = self._coarse_decoder_pass(
mel_specs, encoder_outputs, alignments, input_mask)
return decoder_outputs, postnet_outputs, alignments, stop_tokens, decoder_outputs_backward, alignments_backward
return decoder_outputs, postnet_outputs, alignments, stop_tokens
@torch.no_grad()
def inference(self,
characters,
speaker_ids=None,
style_mel=None,
speaker_embeddings=None):
inputs = self.embedding(characters)
encoder_outputs = self.encoder(inputs)
if self.gst:
# B x gst_dim
encoder_outputs = self.compute_gst(
encoder_outputs, style_mel,
speaker_embeddings if self.gst_use_speaker_embedding else None)
if self.num_speakers > 1:
if not self.embeddings_per_sample:
# B x 1 x speaker_embed_dim
speaker_embeddings = self.speaker_embedding(speaker_ids)[:,
None]
else:
# B x 1 x speaker_embed_dim
speaker_embeddings = torch.unsqueeze(speaker_embeddings, 1)
encoder_outputs = self._concat_speaker_embedding(
encoder_outputs, speaker_embeddings)
decoder_outputs, alignments, stop_tokens = self.decoder.inference(
encoder_outputs)
postnet_outputs = self.postnet(decoder_outputs)
postnet_outputs = self.last_linear(postnet_outputs)
decoder_outputs = decoder_outputs.transpose(1, 2)
return decoder_outputs, postnet_outputs, alignments, stop_tokens
def __init__(self,
num_chars,
num_speakers,
r=5,
postnet_output_dim=1025,
decoder_output_dim=80,
attn_type='original',
attn_win=False,
attn_norm="sigmoid",
prenet_type="original",
prenet_dropout=True,
forward_attn=False,
trans_agent=False,
forward_attn_mask=False,
location_attn=True,
attn_K=5,
separate_stopnet=True,
bidirectional_decoder=False,
double_decoder_consistency=False,
ddc_r=None,
encoder_in_features=256,
decoder_in_features=256,
speaker_embedding_dim=None,
gst=False,
gst_embedding_dim=256,
gst_num_heads=4,
gst_style_tokens=10,
memory_size=5,
gst_use_speaker_embedding=False):
super(Tacotron, self).__init__(
num_chars, num_speakers, r, postnet_output_dim, decoder_output_dim,
attn_type, attn_win, attn_norm, prenet_type, prenet_dropout,
forward_attn, trans_agent, forward_attn_mask, location_attn,
attn_K, separate_stopnet, bidirectional_decoder,
double_decoder_consistency, ddc_r, encoder_in_features,
decoder_in_features, speaker_embedding_dim, gst, gst_embedding_dim,
gst_num_heads, gst_style_tokens, gst_use_speaker_embedding)
# speaker embedding layers
if self.num_speakers > 1:
if not self.embeddings_per_sample:
speaker_embedding_dim = 256
self.speaker_embedding = nn.Embedding(self.num_speakers,
speaker_embedding_dim)
self.speaker_embedding.weight.data.normal_(0, 0.3)
# speaker and gst embeddings is concat in decoder input
if self.num_speakers > 1:
self.decoder_in_features += speaker_embedding_dim # add speaker embedding dim
# embedding layer
self.embedding = nn.Embedding(num_chars, 256, padding_idx=0)
self.embedding.weight.data.normal_(0, 0.3)
# base model layers
self.encoder = Encoder(self.encoder_in_features)
self.decoder = Decoder(self.decoder_in_features, decoder_output_dim, r,
memory_size, attn_type, attn_win, attn_norm,
prenet_type, prenet_dropout, forward_attn,
trans_agent, forward_attn_mask, location_attn,
attn_K, separate_stopnet)
self.postnet = PostCBHG(decoder_output_dim)
self.last_linear = nn.Linear(self.postnet.cbhg.gru_features * 2,
postnet_output_dim)
# global style token layers
if self.gst:
self.gst_layer = GST(num_mel=80,
num_heads=gst_num_heads,
num_style_tokens=gst_style_tokens,
gst_embedding_dim=self.gst_embedding_dim,
speaker_embedding_dim=speaker_embedding_dim
if self.embeddings_per_sample
and self.gst_use_speaker_embedding else None)
# backward pass decoder
if self.bidirectional_decoder:
self._init_backward_decoder()
# setup DDC
if self.double_decoder_consistency:
self.coarse_decoder = Decoder(
self.decoder_in_features, decoder_output_dim, ddc_r,
memory_size, attn_type, attn_win, attn_norm, prenet_type,
prenet_dropout, forward_attn, trans_agent, forward_attn_mask,
location_attn, attn_K, separate_stopnet)