# Copyright 2021 Tomoki Hayashi # Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0) """VITS module for GAN-TTS task.""" from contextlib import contextmanager from distutils.version import LooseVersion from typing import Any, Dict, Optional import torch from typeguard import check_argument_types from espnet2.gan_tts.abs_gan_tts import AbsGANTTS from espnet2.gan_tts.hifigan import ( HiFiGANMultiPeriodDiscriminator, HiFiGANMultiScaleDiscriminator, HiFiGANMultiScaleMultiPeriodDiscriminator, HiFiGANPeriodDiscriminator, HiFiGANScaleDiscriminator, ) from espnet2.gan_tts.hifigan.loss import ( DiscriminatorAdversarialLoss, FeatureMatchLoss, GeneratorAdversarialLoss, MelSpectrogramLoss, ) from espnet2.gan_tts.utils import get_segments from espnet2.gan_tts.vits.generator import VITSGenerator from espnet2.gan_tts.vits.loss import KLDivergenceLoss from espnet2.torch_utils.device_funcs import force_gatherable AVAILABLE_GENERATERS = { "vits_generator": VITSGenerator, } AVAILABLE_DISCRIMINATORS = { "hifigan_period_discriminator": HiFiGANPeriodDiscriminator, "hifigan_scale_discriminator": HiFiGANScaleDiscriminator, "hifigan_multi_period_discriminator": HiFiGANMultiPeriodDiscriminator, "hifigan_multi_scale_discriminator": HiFiGANMultiScaleDiscriminator, "hifigan_multi_scale_multi_period_discriminator": HiFiGANMultiScaleMultiPeriodDiscriminator, # NOQA } if LooseVersion(torch.__version__) >= LooseVersion("1.6.0"): from torch.cuda.amp import autocast else: # Nothing to do if torch<1.6.0 @contextmanager def autocast(enabled=True): # NOQA yield class VITS(AbsGANTTS): """VITS module (generator + discriminator). This is a module of VITS described in `Conditional Variational Autoencoder with Adversarial Learning for End-to-End Text-to-Speech`_. .. _`Conditional Variational Autoencoder with Adversarial Learning for End-to-End Text-to-Speech`: https://arxiv.org/abs/2006.04558 """ def __init__( self, # generator related idim: int, odim: int, sampling_rate: int = 22050, generator_type: str = "vits_generator", generator_params: Dict[str, Any] = { "hidden_channels": 192, "spks": None, "langs": None, "spk_embed_dim": None, "global_channels": -1, "segment_size": 32, "text_encoder_attention_heads": 2, "text_encoder_ffn_expand": 4, "text_encoder_blocks": 6, "text_encoder_positionwise_layer_type": "conv1d", "text_encoder_positionwise_conv_kernel_size": 1, "text_encoder_positional_encoding_layer_type": "rel_pos", "text_encoder_self_attention_layer_type": "rel_selfattn", "text_encoder_activation_type": "swish", "text_encoder_normalize_before": True, "text_encoder_dropout_rate": 0.1, "text_encoder_positional_dropout_rate": 0.0, "text_encoder_attention_dropout_rate": 0.0, "text_encoder_conformer_kernel_size": 7, "use_macaron_style_in_text_encoder": True, "use_conformer_conv_in_text_encoder": True, "decoder_kernel_size": 7, "decoder_channels": 512, "decoder_upsample_scales": [8, 8, 2, 2], "decoder_upsample_kernel_sizes": [16, 16, 4, 4], "decoder_resblock_kernel_sizes": [3, 7, 11], "decoder_resblock_dilations": [[1, 3, 5], [1, 3, 5], [1, 3, 5]], "use_weight_norm_in_decoder": True, "posterior_encoder_kernel_size": 5, "posterior_encoder_layers": 16, "posterior_encoder_stacks": 1, "posterior_encoder_base_dilation": 1, "posterior_encoder_dropout_rate": 0.0, "use_weight_norm_in_posterior_encoder": True, "flow_flows": 4, "flow_kernel_size": 5, "flow_base_dilation": 1, "flow_layers": 4, "flow_dropout_rate": 0.0, "use_weight_norm_in_flow": True, "use_only_mean_in_flow": True, "stochastic_duration_predictor_kernel_size": 3, "stochastic_duration_predictor_dropout_rate": 0.5, "stochastic_duration_predictor_flows": 4, "stochastic_duration_predictor_dds_conv_layers": 3, }, # discriminator related discriminator_type: str = "hifigan_multi_scale_multi_period_discriminator", discriminator_params: Dict[str, Any] = { "scales": 1, "scale_downsample_pooling": "AvgPool1d", "scale_downsample_pooling_params": { "kernel_size": 4, "stride": 2, "padding": 2, }, "scale_discriminator_params": { "in_channels": 1, "out_channels": 1, "kernel_sizes": [15, 41, 5, 3], "channels": 128, "max_downsample_channels": 1024, "max_groups": 16, "bias": True, "downsample_scales": [2, 2, 4, 4, 1], "nonlinear_activation": "LeakyReLU", "nonlinear_activation_params": {"negative_slope": 0.1}, "use_weight_norm": True, "use_spectral_norm": False, }, "follow_official_norm": False, "periods": [2, 3, 5, 7, 11], "period_discriminator_params": { "in_channels": 1, "out_channels": 1, "kernel_sizes": [5, 3], "channels": 32, "downsample_scales": [3, 3, 3, 3, 1], "max_downsample_channels": 1024, "bias": True, "nonlinear_activation": "LeakyReLU", "nonlinear_activation_params": {"negative_slope": 0.1}, "use_weight_norm": True, "use_spectral_norm": False, }, }, # loss related generator_adv_loss_params: Dict[str, Any] = { "average_by_discriminators": False, "loss_type": "mse", }, discriminator_adv_loss_params: Dict[str, Any] = { "average_by_discriminators": False, "loss_type": "mse", }, feat_match_loss_params: Dict[str, Any] = { "average_by_discriminators": False, "average_by_layers": False, "include_final_outputs": True, }, mel_loss_params: Dict[str, Any] = { "fs": 22050, "n_fft": 1024, "hop_length": 256, "win_length": None, "window": "hann", "n_mels": 80, "fmin": 0, "fmax": None, "log_base": None, }, lambda_adv: float = 1.0, lambda_mel: float = 45.0, lambda_feat_match: float = 2.0, lambda_dur: float = 1.0, lambda_kl: float = 1.0, cache_generator_outputs: bool = True, ): """Initialize VITS module. Args: idim (int): Input vocabrary size. odim (int): Acoustic feature dimension. The actual output channels will be 1 since VITS is the end-to-end text-to-wave model but for the compatibility odim is used to indicate the acoustic feature dimension. sampling_rate (int): Sampling rate, not used for the training but it will be referred in saving waveform during the inference. generator_type (str): Generator type. generator_params (Dict[str, Any]): Parameter dict for generator. discriminator_type (str): Discriminator type. discriminator_params (Dict[str, Any]): Parameter dict for discriminator. generator_adv_loss_params (Dict[str, Any]): Parameter dict for generator adversarial loss. discriminator_adv_loss_params (Dict[str, Any]): Parameter dict for discriminator adversarial loss. feat_match_loss_params (Dict[str, Any]): Parameter dict for feat match loss. mel_loss_params (Dict[str, Any]): Parameter dict for mel loss. lambda_adv (float): Loss scaling coefficient for adversarial loss. lambda_mel (float): Loss scaling coefficient for mel spectrogram loss. lambda_feat_match (float): Loss scaling coefficient for feat match loss. lambda_dur (float): Loss scaling coefficient for duration loss. lambda_kl (float): Loss scaling coefficient for KL divergence loss. cache_generator_outputs (bool): Whether to cache generator outputs. """ assert check_argument_types() super().__init__() # define modules generator_class = AVAILABLE_GENERATERS[generator_type] if generator_type == "vits_generator": # NOTE(kan-bayashi): Update parameters for the compatibility. # The idim and odim is automatically decided from input data, # where idim represents #vocabularies and odim represents # the input acoustic feature dimension. generator_params.update(vocabs=idim, aux_channels=odim) self.generator = generator_class( **generator_params, ) discriminator_class = AVAILABLE_DISCRIMINATORS[discriminator_type] self.discriminator = discriminator_class( **discriminator_params, ) self.generator_adv_loss = GeneratorAdversarialLoss( **generator_adv_loss_params, ) self.discriminator_adv_loss = DiscriminatorAdversarialLoss( **discriminator_adv_loss_params, ) self.feat_match_loss = FeatureMatchLoss( **feat_match_loss_params, ) self.mel_loss = MelSpectrogramLoss( **mel_loss_params, ) self.kl_loss = KLDivergenceLoss() # coefficients self.lambda_adv = lambda_adv self.lambda_mel = lambda_mel self.lambda_kl = lambda_kl self.lambda_feat_match = lambda_feat_match self.lambda_dur = lambda_dur # cache self.cache_generator_outputs = cache_generator_outputs self._cache = None # store sampling rate for saving wav file # (not used for the training) self.fs = sampling_rate # store parameters for test compatibility self.spks = self.generator.spks self.langs = self.generator.langs self.spk_embed_dim = self.generator.spk_embed_dim @property def require_raw_speech(self): """Return whether or not speech is required.""" return True @property def require_vocoder(self): """Return whether or not vocoder is required.""" return False def forward( self, text: torch.Tensor, text_lengths: torch.Tensor, feats: torch.Tensor, feats_lengths: torch.Tensor, speech: torch.Tensor, speech_lengths: torch.Tensor, sids: Optional[torch.Tensor] = None, spembs: Optional[torch.Tensor] = None, lids: Optional[torch.Tensor] = None, forward_generator: bool = True, ) -> Dict[str, Any]: """Perform generator forward. Args: text (Tensor): Text index tensor (B, T_text). text_lengths (Tensor): Text length tensor (B,). feats (Tensor): Feature tensor (B, T_feats, aux_channels). feats_lengths (Tensor): Feature length tensor (B,). speech (Tensor): Speech waveform tensor (B, T_wav). speech_lengths (Tensor): Speech length tensor (B,). sids (Optional[Tensor]): Speaker index tensor (B,) or (B, 1). spembs (Optional[Tensor]): Speaker embedding tensor (B, spk_embed_dim). lids (Optional[Tensor]): Language index tensor (B,) or (B, 1). forward_generator (bool): Whether to forward generator. Returns: Dict[str, Any]: - loss (Tensor): Loss scalar tensor. - stats (Dict[str, float]): Statistics to be monitored. - weight (Tensor): Weight tensor to summarize losses. - optim_idx (int): Optimizer index (0 for G and 1 for D). """ if forward_generator: return self._forward_generator( text=text, text_lengths=text_lengths, feats=feats, feats_lengths=feats_lengths, speech=speech, speech_lengths=speech_lengths, sids=sids, spembs=spembs, lids=lids, ) else: return self._forward_discrminator( text=text, text_lengths=text_lengths, feats=feats, feats_lengths=feats_lengths, speech=speech, speech_lengths=speech_lengths, sids=sids, spembs=spembs, lids=lids, ) def _forward_generator( self, text: torch.Tensor, text_lengths: torch.Tensor, feats: torch.Tensor, feats_lengths: torch.Tensor, speech: torch.Tensor, speech_lengths: torch.Tensor, sids: Optional[torch.Tensor] = None, spembs: Optional[torch.Tensor] = None, lids: Optional[torch.Tensor] = None, ) -> Dict[str, Any]: """Perform generator forward. Args: text (Tensor): Text index tensor (B, T_text). text_lengths (Tensor): Text length tensor (B,). feats (Tensor): Feature tensor (B, T_feats, aux_channels). feats_lengths (Tensor): Feature length tensor (B,). speech (Tensor): Speech waveform tensor (B, T_wav). speech_lengths (Tensor): Speech length tensor (B,). sids (Optional[Tensor]): Speaker index tensor (B,) or (B, 1). spembs (Optional[Tensor]): Speaker embedding tensor (B, spk_embed_dim). lids (Optional[Tensor]): Language index tensor (B,) or (B, 1). Returns: Dict[str, Any]: * loss (Tensor): Loss scalar tensor. * stats (Dict[str, float]): Statistics to be monitored. * weight (Tensor): Weight tensor to summarize losses. * optim_idx (int): Optimizer index (0 for G and 1 for D). """ # setup batch_size = text.size(0) feats = feats.transpose(1, 2) speech = speech.unsqueeze(1) # calculate generator outputs reuse_cache = True if not self.cache_generator_outputs or self._cache is None: reuse_cache = False outs = self.generator( text=text, text_lengths=text_lengths, feats=feats, feats_lengths=feats_lengths, sids=sids, spembs=spembs, lids=lids, ) else: outs = self._cache # store cache if self.training and self.cache_generator_outputs and not reuse_cache: self._cache = outs # parse outputs speech_hat_, dur_nll, _, start_idxs, _, z_mask, outs_ = outs _, z_p, m_p, logs_p, _, logs_q = outs_ speech_ = get_segments( x=speech, start_idxs=start_idxs * self.generator.upsample_factor, segment_size=self.generator.segment_size * self.generator.upsample_factor, ) # calculate discriminator outputs p_hat = self.discriminator(speech_hat_) with torch.no_grad(): # do not store discriminator gradient in generator turn p = self.discriminator(speech_) # calculate losses with autocast(enabled=False): mel_loss = self.mel_loss(speech_hat_, speech_) kl_loss = self.kl_loss(z_p, logs_q, m_p, logs_p, z_mask) dur_loss = torch.sum(dur_nll.float()) adv_loss = self.generator_adv_loss(p_hat) feat_match_loss = self.feat_match_loss(p_hat, p) mel_loss = mel_loss * self.lambda_mel kl_loss = kl_loss * self.lambda_kl dur_loss = dur_loss * self.lambda_dur adv_loss = adv_loss * self.lambda_adv feat_match_loss = feat_match_loss * self.lambda_feat_match loss = mel_loss + kl_loss + dur_loss + adv_loss + feat_match_loss stats = dict( generator_loss=loss.item(), generator_mel_loss=mel_loss.item(), generator_kl_loss=kl_loss.item(), generator_dur_loss=dur_loss.item(), generator_adv_loss=adv_loss.item(), generator_feat_match_loss=feat_match_loss.item(), ) loss, stats, weight = force_gatherable((loss, stats, batch_size), loss.device) # reset cache if reuse_cache or not self.training: self._cache = None return { "loss": loss, "stats": stats, "weight": weight, "optim_idx": 0, # needed for trainer } def _forward_discrminator( self, text: torch.Tensor, text_lengths: torch.Tensor, feats: torch.Tensor, feats_lengths: torch.Tensor, speech: torch.Tensor, speech_lengths: torch.Tensor, sids: Optional[torch.Tensor] = None, spembs: Optional[torch.Tensor] = None, lids: Optional[torch.Tensor] = None, ) -> Dict[str, Any]: """Perform discriminator forward. Args: text (Tensor): Text index tensor (B, T_text). text_lengths (Tensor): Text length tensor (B,). feats (Tensor): Feature tensor (B, T_feats, aux_channels). feats_lengths (Tensor): Feature length tensor (B,). speech (Tensor): Speech waveform tensor (B, T_wav). speech_lengths (Tensor): Speech length tensor (B,). sids (Optional[Tensor]): Speaker index tensor (B,) or (B, 1). spembs (Optional[Tensor]): Speaker embedding tensor (B, spk_embed_dim). lids (Optional[Tensor]): Language index tensor (B,) or (B, 1). Returns: Dict[str, Any]: * loss (Tensor): Loss scalar tensor. * stats (Dict[str, float]): Statistics to be monitored. * weight (Tensor): Weight tensor to summarize losses. * optim_idx (int): Optimizer index (0 for G and 1 for D). """ # setup batch_size = text.size(0) feats = feats.transpose(1, 2) speech = speech.unsqueeze(1) # calculate generator outputs reuse_cache = True if not self.cache_generator_outputs or self._cache is None: reuse_cache = False outs = self.generator( text=text, text_lengths=text_lengths, feats=feats, feats_lengths=feats_lengths, sids=sids, spembs=spembs, lids=lids, ) else: outs = self._cache # store cache if self.cache_generator_outputs and not reuse_cache: self._cache = outs # parse outputs speech_hat_, _, _, start_idxs, *_ = outs speech_ = get_segments( x=speech, start_idxs=start_idxs * self.generator.upsample_factor, segment_size=self.generator.segment_size * self.generator.upsample_factor, ) # calculate discriminator outputs p_hat = self.discriminator(speech_hat_.detach()) p = self.discriminator(speech_) # calculate losses with autocast(enabled=False): real_loss, fake_loss = self.discriminator_adv_loss(p_hat, p) loss = real_loss + fake_loss stats = dict( discriminator_loss=loss.item(), discriminator_real_loss=real_loss.item(), discriminator_fake_loss=fake_loss.item(), ) loss, stats, weight = force_gatherable((loss, stats, batch_size), loss.device) # reset cache if reuse_cache or not self.training: self._cache = None return { "loss": loss, "stats": stats, "weight": weight, "optim_idx": 1, # needed for trainer } def inference( self, text: torch.Tensor, feats: Optional[torch.Tensor] = None, sids: Optional[torch.Tensor] = None, spembs: Optional[torch.Tensor] = None, lids: Optional[torch.Tensor] = None, durations: Optional[torch.Tensor] = None, noise_scale: float = 0.667, noise_scale_dur: float = 0.8, alpha: float = 1.0, max_len: Optional[int] = None, use_teacher_forcing: bool = False, ) -> Dict[str, torch.Tensor]: """Run inference. Args: text (Tensor): Input text index tensor (T_text,). feats (Tensor): Feature tensor (T_feats, aux_channels). sids (Tensor): Speaker index tensor (1,). spembs (Optional[Tensor]): Speaker embedding tensor (spk_embed_dim,). lids (Tensor): Language index tensor (1,). durations (Tensor): Ground-truth duration tensor (T_text,). noise_scale (float): Noise scale value for flow. noise_scale_dur (float): Noise scale value for duration predictor. alpha (float): Alpha parameter to control the speed of generated speech. max_len (Optional[int]): Maximum length. use_teacher_forcing (bool): Whether to use teacher forcing. Returns: Dict[str, Tensor]: * wav (Tensor): Generated waveform tensor (T_wav,). * att_w (Tensor): Monotonic attention weight tensor (T_feats, T_text). * duration (Tensor): Predicted duration tensor (T_text,). """ # setup text = text[None] text_lengths = torch.tensor( [text.size(1)], dtype=torch.long, device=text.device, ) if sids is not None: sids = sids.view(1) if lids is not None: lids = lids.view(1) if durations is not None: durations = durations.view(1, 1, -1) # inference if use_teacher_forcing: assert feats is not None feats = feats[None].transpose(1, 2) feats_lengths = torch.tensor( [feats.size(2)], dtype=torch.long, device=feats.device, ) wav, att_w, dur = self.generator.inference( text=text, text_lengths=text_lengths, feats=feats, feats_lengths=feats_lengths, sids=sids, spembs=spembs, lids=lids, max_len=max_len, use_teacher_forcing=use_teacher_forcing, ) else: wav, att_w, dur = self.generator.inference( text=text, text_lengths=text_lengths, sids=sids, spembs=spembs, lids=lids, dur=durations, noise_scale=noise_scale, noise_scale_dur=noise_scale_dur, alpha=alpha, max_len=max_len, ) return dict(wav=wav.view(-1), att_w=att_w[0], duration=dur[0])