Class SimpleDecoder

src/ldm/modules/diffusionmodules/model.py:571–604

class SimpleDecoder(nn.Module):
    def __init__(self, in_channels, out_channels, *args, **kwargs):
        super().__init__()
        self.model = nn.ModuleList([nn.Conv2d(in_channels, in_channels, 1),
                                     ResnetBlock(in_channels=in_channels,
                                                 out_channels=2 * in_channels,
                                                 temb_channels=0, dropout=0.0),
                                     ResnetBlock(in_channels=2 * in_channels,
                                                out_channels=4 * in_channels,
                                                temb_channels=0, dropout=0.0),
                                     ResnetBlock(in_channels=4 * in_channels,
                                                out_channels=2 * in_channels,
                                                temb_channels=0, dropout=0.0),
                                     nn.Conv2d(2*in_channels, in_channels, 1),
                                     Upsample(in_channels, with_conv=True)])
        # end
        self.norm_out = Normalize(in_channels)
        self.conv_out = torch.nn.Conv2d(in_channels,
                                        out_channels,
                                        kernel_size=3,
                                        stride=1,
                                        padding=1)

    def forward(self, x):
        for i, layer in enumerate(self.model):
            if i in [1,2,3]:
                x = layer(x, None)
            else:
                x = layer(x)

        h = self.norm_out(x)
        h = nonlinearity(h)
        x = self.conv_out(h)
        return x


class UpsampleDecoder(nn.Module):