import torch
import torch.nn as nn

## *************************** my functions ****************************

def predict_param(in_planes, channel=3):
    return  nn.Conv2d(in_planes, channel, kernel_size=3, stride=1, padding=1, bias=True)

def predict_mask(in_planes, channel=9):
    return  nn.Conv2d(in_planes, channel, kernel_size=3, stride=1, padding=1, bias=True)

def predict_feat(in_planes, channel=20, stride=1):
    return  nn.Conv2d(in_planes, channel, kernel_size=3, stride=stride, padding=1, bias=True)

def predict_prob(in_planes, channel=9):
    return  nn.Sequential(
        nn.Conv2d(in_planes, channel, kernel_size=3, stride=1, padding=1, bias=True),
        nn.Softmax(1)
    )
#***********************************************************************

def conv(batchNorm, in_planes, out_planes, kernel_size=3, stride=1):
    if batchNorm:
        return nn.Sequential(
            nn.Conv2d(in_planes, out_planes, kernel_size=kernel_size, stride=stride, padding=(kernel_size-1)//2, bias=False),
            nn.BatchNorm2d(out_planes),
            nn.LeakyReLU(0.1)
        )
    else:
        return nn.Sequential(
            nn.Conv2d(in_planes, out_planes, kernel_size=kernel_size, stride=stride, padding=(kernel_size-1)//2, bias=True),
            nn.LeakyReLU(0.1)
        )


def deconv(in_planes, out_planes):
    return nn.Sequential(
        nn.ConvTranspose2d(in_planes, out_planes, kernel_size=4, stride=2, padding=1, bias=True),
        nn.LeakyReLU(0.1)
    )