From 26cccc67721803c2b3fd0b0f988d76fce3f6278a Mon Sep 17 00:00:00 2001
From: shahules786 <shahules786@gmail.com>
Date: Mon, 31 Oct 2022 11:43:32 +0530
Subject: [PATCH] complex tranposed conv

---
 enhancer/models/complexnn/conv.py | 64 ++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 2 deletions(-)

diff --git a/enhancer/models/complexnn/conv.py b/enhancer/models/complexnn/conv.py
index eddcce3..55acc07 100644
--- a/enhancer/models/complexnn/conv.py
+++ b/enhancer/models/complexnn/conv.py
@@ -7,7 +7,7 @@ from torch import nn
 
 def init_weights(nnet):
     nn.init.xavier_normal_(nnet.weight.data)
-    nn.init.constant(nnet.bias, 0.0)
+    nn.init.constant_(nnet.bias, 0.0)
     return nnet
 
 
@@ -57,7 +57,6 @@ class ComplexConv2d(nn.Module):
 
     def forward(self, input):
         """
-        forward
         complex axis should be always 1 dim
         """
         input = F.pad(input, [self.padding[1], self.padding[1], 0, 0])
@@ -75,3 +74,64 @@ class ComplexConv2d(nn.Module):
         out = torch.cat([real, imag], 1)
 
         return out
+
+
+class ComplexConvTranspose2d(nn.Module):
+    def __init__(
+        self,
+        in_channels: int,
+        out_channels: int,
+        kernel_size: Tuple[int, int] = (1, 1),
+        stride: Tuple[int, int] = (1, 1),
+        padding: Tuple[int, int] = (0, 0),
+        output_padding: Tuple[int, int] = (0, 0),
+        groups: int = 1,
+    ):
+        super().__init__()
+        self.in_channels = in_channels // 2
+        self.out_channels = out_channels // 2
+        self.kernel_size = kernel_size
+        self.stride = stride
+        self.padding = padding
+        self.groups = groups
+        self.output_padding = output_padding
+
+        self.real_conv = nn.ConvTranspose2d(
+            self.in_channels,
+            self.out_channels,
+            kernel_size=self.kernel_size,
+            stride=self.stride,
+            padding=self.padding,
+            output_padding=self.output_padding,
+            groups=self.groups,
+        )
+
+        self.imag_conv = nn.ConvTranspose2d(
+            self.in_channels,
+            self.out_channels,
+            kernel_size=self.kernel_size,
+            stride=self.stride,
+            padding=self.padding,
+            output_padding=self.output_padding,
+            groups=self.groups,
+        )
+
+        init_weights(self.real_conv)
+        init_weights(self.imag_conv)
+
+    def forward(self, input):
+
+        real, imag = torch.chunk(input, 2, 1)
+
+        real_real = self.real_conv(real)
+        real_imag = self.imag_conv(real)
+
+        imag_imag = self.imag_conv(imag)
+        imag_real = self.real_conv(imag)
+
+        real = real_real - imag_imag
+        imag = real_imag - imag_real
+
+        out = torch.cat([real, imag], 1)
+
+        return out