mirror of
https://github.com/iperov/DeepFaceLive.git
synced 2024-12-25 15:31:13 -08:00
140 lines
6.8 KiB
Python
140 lines
6.8 KiB
Python
from functools import partial
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import torch
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import torch.nn as nn
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import torch.nn.functional as F
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def _make_divisible(v: float, divisor: int, min_value = None) -> int:
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if min_value is None:
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min_value = divisor
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new_v = max(min_value, int(v + divisor / 2) // divisor * divisor)
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if new_v < 0.9 * v:
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new_v += divisor
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return new_v
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class SqueezeExcitation(nn.Module):
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def __init__( self, in_ch: int, squeeze_channels: int, activation = nn.ReLU, scale_activation = nn.Sigmoid):
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super().__init__()
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self.avgpool = nn.AdaptiveAvgPool2d(1)
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self.fc1 = nn.Conv2d(in_ch, squeeze_channels, 1)
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self.fc2 = nn.Conv2d(squeeze_channels, in_ch, 1)
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self.activation = activation()
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self.scale_activation = scale_activation()
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def forward(self, input):
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scale = self.avgpool(input)
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scale = self.fc1(scale)
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scale = self.activation(scale)
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scale = self.fc2(scale)
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scale = self.scale_activation(scale)
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return scale * input
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class ConvNormActivation(nn.Sequential):
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def __init__(self, in_ch: int, out_ch: int, kernel_size: int = 3, stride: int = 1, padding = None, groups: int = 1, norm_layer = nn.BatchNorm2d, activation_layer = nn.ReLU,) -> None:
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if padding is None:
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padding = (kernel_size - 1) // 2
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layers = [torch.nn.Conv2d(in_ch, out_ch, kernel_size, stride, padding, groups=groups, bias=norm_layer is None)]
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if norm_layer is not None:
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layers.append(norm_layer(out_ch))
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if activation_layer is not None:
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layers.append(activation_layer())
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super().__init__(*layers)
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self.out_ch = out_ch
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class InvertedResidual(nn.Module):
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def __init__(self, in_ch: int, mid_ch: int, out_ch: int, kernel: int, stride: int, use_se: bool,
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hs_act : bool, width_mult: float = 1.0,
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norm_layer = None,):
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super().__init__()
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mid_ch = _make_divisible(mid_ch * width_mult, 8)
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out_ch = _make_divisible(out_ch * width_mult, 8)
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self._is_res_connect = stride == 1 and in_ch == out_ch
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activation_layer = nn.Hardswish if hs_act else nn.ReLU
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layers = []
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if mid_ch != in_ch:
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layers.append(ConvNormActivation(in_ch, mid_ch, kernel_size=1, norm_layer=norm_layer, activation_layer=activation_layer))
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layers.append(ConvNormActivation(mid_ch, mid_ch, kernel_size=kernel, stride=stride, groups=mid_ch, norm_layer=norm_layer, activation_layer=activation_layer))
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if use_se:
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layers.append( SqueezeExcitation(mid_ch, _make_divisible(mid_ch // 4, 8), scale_activation=nn.Hardsigmoid) )
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layers.append(ConvNormActivation(mid_ch, out_ch, kernel_size=1, norm_layer=norm_layer, activation_layer=None))
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self.block = nn.Sequential(*layers)
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self.out_ch = out_ch
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def forward(self, input):
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result = self.block(input)
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if self._is_res_connect:
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result = result + input
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return result
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class MobileNet(nn.Module):
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def __init__(self, in_ch, out_ch, width_mult=1.0):
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super().__init__()
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norm_layer = partial(nn.BatchNorm2d, eps=0.001, momentum=0.01)
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self.c0 = c0 = ConvNormActivation(in_ch, _make_divisible(16 * width_mult, 8), kernel_size=3, stride=2, norm_layer=norm_layer, activation_layer=nn.Hardswish)
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self.c1 = c1 = InvertedResidual ( c0.out_ch, 16, 16, 3, 1, use_se=False, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c2 = c2 = InvertedResidual ( c1.out_ch, 64, 24, 3, 2, use_se=False, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c3 = c3 = InvertedResidual ( c2.out_ch, 72, 24, 3, 1, use_se=False, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c4 = c4 = InvertedResidual ( c3.out_ch, 72, 40, 5, 2, use_se=True, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c5 = c5 = InvertedResidual ( c4.out_ch, 120, 40, 5, 1, use_se=True, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c6 = c6 = InvertedResidual ( c5.out_ch, 120, 40, 5, 1, use_se=True, hs_act=False, norm_layer=norm_layer, width_mult=width_mult)
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self.c7 = c7 = InvertedResidual ( c6.out_ch, 240, 80, 3, 2, use_se=False, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c8 = c8 = InvertedResidual ( c7.out_ch, 200, 80, 3, 1, use_se=False, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c9 = c9 = InvertedResidual ( c8.out_ch, 184, 80, 3, 1, use_se=False, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c10 = c10 = InvertedResidual ( c9.out_ch, 184, 80, 3, 1, use_se=False, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c11 = c11 = InvertedResidual ( c10.out_ch, 480, 112, 3, 1, use_se=True, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c12 = c12 = InvertedResidual ( c11.out_ch, 672, 112, 3, 1, use_se=True, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c13 = c13 = InvertedResidual ( c12.out_ch, 672, 160, 5, 2, use_se=True, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c14 = c14 = InvertedResidual ( c13.out_ch, 960, 160, 5, 1, use_se=True, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c15 = c15 = InvertedResidual ( c14.out_ch, 960, 160, 5, 1, use_se=True, hs_act=True, norm_layer=norm_layer, width_mult=width_mult)
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self.c16 = c16 = ConvNormActivation(c15.out_ch, _make_divisible(6*160*width_mult, 8), kernel_size=1, norm_layer=norm_layer, activation_layer=nn.Hardswish)
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self.fc1 = nn.Linear(c16.out_ch, _make_divisible(c16.out_ch*1.33, 8) )
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self.fc1_act = nn.Hardswish()
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self.fc2 = nn.Linear(self.fc1.out_features, out_ch)
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for m in self.modules():
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if isinstance(m, nn.Conv2d):
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nn.init.kaiming_normal_(m.weight, mode='fan_out')
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if m.bias is not None:
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nn.init.zeros_(m.bias)
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elif isinstance(m, (nn.BatchNorm2d, nn.GroupNorm)):
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nn.init.ones_(m.weight)
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nn.init.zeros_(m.bias)
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elif isinstance(m, nn.Linear):
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nn.init.normal_(m.weight, 0, 0.01)
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nn.init.zeros_(m.bias)
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def forward(self, inp):
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x = inp
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x = self.c0(x)
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x = self.c1(x)
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x = self.c2(x)
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x = self.c3(x)
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x = self.c4(x)
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x = self.c5(x)
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x = self.c6(x)
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x = self.c7(x)
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x = self.c8(x)
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x = self.c9(x)
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x = self.c10(x)
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x = self.c11(x)
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x = self.c12(x)
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x = self.c13(x)
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x = self.c14(x)
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x = self.c15(x)
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x = self.c16(x)
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x = self.fc1(x.mean((-2,-1)))
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x = self.fc1_act(x)
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x = self.fc2(x)
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return x
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