117 lines
3.6 KiB
Python
117 lines
3.6 KiB
Python
import torch
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import torch.nn as nn
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from omegaconf import OmegaConf
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from models.audio.vocoders.univnet.lvcnet import LVCBlock
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from trainer.networks import register_model
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MAX_WAV_VALUE = 32768.0
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class UnivNetGenerator(nn.Module):
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"""UnivNet Generator"""
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def __init__(self, noise_dim=64, channel_size=32, dilations=[1,3,9,27], strides=[8,8,4], lReLU_slope=.2, kpnet_conv_size=3,
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# Below are MEL configurations options that this generator requires.
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hop_length=256, n_mel_channels=100):
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super(UnivNetGenerator, self).__init__()
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self.mel_channel = n_mel_channels
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self.noise_dim = noise_dim
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self.hop_length = hop_length
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channel_size = channel_size
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kpnet_conv_size = kpnet_conv_size
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self.res_stack = nn.ModuleList()
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hop_length = 1
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for stride in strides:
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hop_length = stride * hop_length
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self.res_stack.append(
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LVCBlock(
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channel_size,
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n_mel_channels,
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stride=stride,
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dilations=dilations,
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lReLU_slope=lReLU_slope,
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cond_hop_length=hop_length,
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kpnet_conv_size=kpnet_conv_size
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)
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)
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self.conv_pre = \
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nn.utils.weight_norm(nn.Conv1d(noise_dim, channel_size, 7, padding=3, padding_mode='reflect'))
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self.conv_post = nn.Sequential(
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nn.LeakyReLU(lReLU_slope),
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nn.utils.weight_norm(nn.Conv1d(channel_size, 1, 7, padding=3, padding_mode='reflect')),
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nn.Tanh(),
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)
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def forward(self, c, z):
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'''
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Args:
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c (Tensor): the conditioning sequence of mel-spectrogram (batch, mel_channels, in_length)
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z (Tensor): the noise sequence (batch, noise_dim, in_length)
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'''
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z = self.conv_pre(z) # (B, c_g, L)
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for res_block in self.res_stack:
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res_block.to(z.device)
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z = res_block(z, c) # (B, c_g, L * s_0 * ... * s_i)
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z = self.conv_post(z) # (B, 1, L * 256)
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return z
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def eval(self, inference=False):
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super(UnivNetGenerator, self).eval()
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# don't remove weight norm while validation in training loop
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if inference:
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self.remove_weight_norm()
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def remove_weight_norm(self):
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print('Removing weight norm...')
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nn.utils.remove_weight_norm(self.conv_pre)
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for layer in self.conv_post:
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if len(layer.state_dict()) != 0:
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nn.utils.remove_weight_norm(layer)
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for res_block in self.res_stack:
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res_block.remove_weight_norm()
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def inference(self, c, z=None):
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# pad input mel with zeros to cut artifact
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# see https://github.com/seungwonpark/melgan/issues/8
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zero = torch.full((c.shape[0], self.mel_channel, 10), -11.5129).to(c.device)
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mel = torch.cat((c, zero), dim=2)
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if z is None:
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z = torch.randn(c.shape[0], self.noise_dim, mel.size(2)).to(mel.device)
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audio = self.forward(mel, z)
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audio = audio[:, :, :-(self.hop_length * 10)]
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audio = audio.clamp(min=-1, max=1)
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return audio
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@register_model
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def register_univnet(opt_net, opt):
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return UnivNetGenerator(**opt_net['args'])
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if __name__ == '__main__':
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model = UnivNetGenerator()
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c = torch.randn(3, 100, 10)
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z = torch.randn(3, 64, 10)
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print(c.shape)
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y = model(c, z)
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print(y.shape)
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assert y.shape == torch.Size([3, 1, 2560])
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pytorch_total_params = sum(p.numel() for p in model.parameters() if p.requires_grad)
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print(pytorch_total_params)
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