134 lines
4.1 KiB
Python
134 lines
4.1 KiB
Python
import torch
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import torch.nn.functional as F
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from torch import nn
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from . import layers_new
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class BaseNet(nn.Module):
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def __init__(
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self, nin, nout, nin_lstm, nout_lstm, dilations=((4, 2), (8, 4), (12, 6))
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):
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super(BaseNet, self).__init__()
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self.enc1 = layers_new.Conv2DBNActiv(nin, nout, 3, 1, 1)
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self.enc2 = layers_new.Encoder(nout, nout * 2, 3, 2, 1)
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self.enc3 = layers_new.Encoder(nout * 2, nout * 4, 3, 2, 1)
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self.enc4 = layers_new.Encoder(nout * 4, nout * 6, 3, 2, 1)
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self.enc5 = layers_new.Encoder(nout * 6, nout * 8, 3, 2, 1)
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self.aspp = layers_new.ASPPModule(nout * 8, nout * 8, dilations, dropout=True)
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self.dec4 = layers_new.Decoder(nout * (6 + 8), nout * 6, 3, 1, 1)
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self.dec3 = layers_new.Decoder(nout * (4 + 6), nout * 4, 3, 1, 1)
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self.dec2 = layers_new.Decoder(nout * (2 + 4), nout * 2, 3, 1, 1)
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self.lstm_dec2 = layers_new.LSTMModule(nout * 2, nin_lstm, nout_lstm)
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self.dec1 = layers_new.Decoder(nout * (1 + 2) + 1, nout * 1, 3, 1, 1)
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def __call__(self, x):
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e1 = self.enc1(x)
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e2 = self.enc2(e1)
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e3 = self.enc3(e2)
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e4 = self.enc4(e3)
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e5 = self.enc5(e4)
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h = self.aspp(e5)
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h = self.dec4(h, e4)
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h = self.dec3(h, e3)
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h = self.dec2(h, e2)
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h = torch.cat([h, self.lstm_dec2(h)], dim=1)
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h = self.dec1(h, e1)
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return h
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class CascadedNet(nn.Module):
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def __init__(self, n_fft, nout=32, nout_lstm=128):
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super(CascadedNet, self).__init__()
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self.max_bin = n_fft // 2
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self.output_bin = n_fft // 2 + 1
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self.nin_lstm = self.max_bin // 2
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self.offset = 64
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self.stg1_low_band_net = nn.Sequential(
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BaseNet(2, nout // 2, self.nin_lstm // 2, nout_lstm),
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layers_new.Conv2DBNActiv(nout // 2, nout // 4, 1, 1, 0),
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)
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self.stg1_high_band_net = BaseNet(
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2, nout // 4, self.nin_lstm // 2, nout_lstm // 2
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)
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self.stg2_low_band_net = nn.Sequential(
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BaseNet(nout // 4 + 2, nout, self.nin_lstm // 2, nout_lstm),
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layers_new.Conv2DBNActiv(nout, nout // 2, 1, 1, 0),
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)
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self.stg2_high_band_net = BaseNet(
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nout // 4 + 2, nout // 2, self.nin_lstm // 2, nout_lstm // 2
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)
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self.stg3_full_band_net = BaseNet(
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3 * nout // 4 + 2, nout, self.nin_lstm, nout_lstm
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)
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self.out = nn.Conv2d(nout, 2, 1, bias=False)
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self.aux_out = nn.Conv2d(3 * nout // 4, 2, 1, bias=False)
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def forward(self, x):
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x = x[:, :, : self.max_bin]
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bandw = x.size()[2] // 2
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l1_in = x[:, :, :bandw]
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h1_in = x[:, :, bandw:]
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l1 = self.stg1_low_band_net(l1_in)
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h1 = self.stg1_high_band_net(h1_in)
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aux1 = torch.cat([l1, h1], dim=2)
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l2_in = torch.cat([l1_in, l1], dim=1)
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h2_in = torch.cat([h1_in, h1], dim=1)
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l2 = self.stg2_low_band_net(l2_in)
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h2 = self.stg2_high_band_net(h2_in)
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aux2 = torch.cat([l2, h2], dim=2)
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f3_in = torch.cat([x, aux1, aux2], dim=1)
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f3 = self.stg3_full_band_net(f3_in)
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mask = torch.sigmoid(self.out(f3))
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mask = F.pad(
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input=mask,
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pad=(0, 0, 0, self.output_bin - mask.size()[2]),
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mode="replicate",
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)
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if self.training:
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aux = torch.cat([aux1, aux2], dim=1)
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aux = torch.sigmoid(self.aux_out(aux))
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aux = F.pad(
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input=aux,
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pad=(0, 0, 0, self.output_bin - aux.size()[2]),
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mode="replicate",
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)
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return mask, aux
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else:
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return mask
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def predict_mask(self, x):
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mask = self.forward(x)
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if self.offset > 0:
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mask = mask[:, :, :, self.offset : -self.offset]
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assert mask.size()[3] > 0
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return mask
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def predict(self, x, aggressiveness=None):
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mask = self.forward(x)
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pred_mag = x * mask
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if self.offset > 0:
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pred_mag = pred_mag[:, :, :, self.offset : -self.offset]
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assert pred_mag.size()[3] > 0
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return pred_mag
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