wehub-resource-sync
315 lines
10 KiB
Python
315 lines
10 KiB
Python
# Copyright 3D-Speaker (https://github.com/alibaba-damo-academy/3D-Speaker). All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
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""" Res2Net implementation is adapted from https://github.com/wenet-e2e/wespeaker.
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ERes2Net incorporates both local and global feature fusion techniques to improve the performance.
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The local feature fusion (LFF) fuses the features within one single residual block to extract the local signal.
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The global feature fusion (GFF) takes acoustic features of different scales as input to aggregate global signal.
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ERes2Net-Large is an upgraded version of ERes2Net that uses a larger number of parameters to achieve better
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recognition performance. Parameters expansion, baseWidth, and scale can be modified to obtain optimal performance.
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"""
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import math
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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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import funasr.models.sond.pooling.pooling_layers as pooling_layers
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from funasr.models.eres2net.fusion import AFF
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class ReLU(nn.Hardtanh):
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def __init__(self, inplace=False):
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"""Initialize ReLU.
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Args:
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inplace: TODO.
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"""
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super(ReLU, self).__init__(0, 20, inplace)
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def __repr__(self):
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"""Internal: repr ."""
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inplace_str = "inplace" if self.inplace else ""
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return self.__class__.__name__ + " (" + inplace_str + ")"
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def conv1x1(in_planes, out_planes, stride=1):
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"1x1 convolution without padding"
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return nn.Conv2d(in_planes, out_planes, kernel_size=1, stride=stride, padding=0, bias=False)
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def conv3x3(in_planes, out_planes, stride=1):
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"3x3 convolution with padding"
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return nn.Conv2d(in_planes, out_planes, kernel_size=3, stride=stride, padding=1, bias=False)
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class BasicBlockERes2Net(nn.Module):
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expansion = 4
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def __init__(self, in_planes, planes, stride=1, baseWidth=24, scale=3):
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"""Initialize BasicBlockERes2Net.
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Args:
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in_planes: TODO.
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planes: TODO.
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stride: TODO.
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baseWidth: TODO.
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scale: TODO.
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"""
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super(BasicBlockERes2Net, self).__init__()
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width = int(math.floor(planes * (baseWidth / 64.0)))
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self.conv1 = conv1x1(in_planes, width * scale, stride)
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self.bn1 = nn.BatchNorm2d(width * scale)
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self.nums = scale
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convs = []
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bns = []
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for i in range(self.nums):
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convs.append(conv3x3(width, width))
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bns.append(nn.BatchNorm2d(width))
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self.convs = nn.ModuleList(convs)
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self.bns = nn.ModuleList(bns)
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self.relu = ReLU(inplace=True)
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self.conv3 = conv1x1(width * scale, planes * self.expansion)
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self.bn3 = nn.BatchNorm2d(planes * self.expansion)
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self.shortcut = nn.Sequential()
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if stride != 1 or in_planes != self.expansion * planes:
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self.shortcut = nn.Sequential(
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nn.Conv2d(
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in_planes, self.expansion * planes, kernel_size=1, stride=stride, bias=False
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),
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nn.BatchNorm2d(self.expansion * planes),
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)
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self.stride = stride
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self.width = width
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self.scale = scale
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def forward(self, x):
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"""Forward pass for training.
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Args:
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x: TODO.
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"""
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residual = x
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out = self.conv1(x)
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out = self.bn1(out)
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out = self.relu(out)
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spx = torch.split(out, self.width, 1)
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for i in range(self.nums):
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if i == 0:
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sp = spx[i]
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else:
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sp = sp + spx[i]
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sp = self.convs[i](sp)
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sp = self.relu(self.bns[i](sp))
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if i == 0:
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out = sp
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else:
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out = torch.cat((out, sp), 1)
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out = self.conv3(out)
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out = self.bn3(out)
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residual = self.shortcut(x)
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out += residual
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out = self.relu(out)
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return out
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class BasicBlockERes2Net_diff_AFF(nn.Module):
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expansion = 4
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def __init__(self, in_planes, planes, stride=1, baseWidth=24, scale=3):
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"""Initialize BasicBlockERes2Net_diff_AFF.
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Args:
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in_planes: TODO.
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planes: TODO.
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stride: TODO.
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baseWidth: TODO.
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scale: TODO.
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"""
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super(BasicBlockERes2Net_diff_AFF, self).__init__()
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width = int(math.floor(planes * (baseWidth / 64.0)))
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self.conv1 = conv1x1(in_planes, width * scale, stride)
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self.bn1 = nn.BatchNorm2d(width * scale)
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self.nums = scale
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convs = []
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fuse_models = []
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bns = []
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for i in range(self.nums):
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convs.append(conv3x3(width, width))
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bns.append(nn.BatchNorm2d(width))
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for j in range(self.nums - 1):
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fuse_models.append(AFF(channels=width))
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self.convs = nn.ModuleList(convs)
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self.bns = nn.ModuleList(bns)
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self.fuse_models = nn.ModuleList(fuse_models)
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self.relu = ReLU(inplace=True)
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self.conv3 = conv1x1(width * scale, planes * self.expansion)
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self.bn3 = nn.BatchNorm2d(planes * self.expansion)
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self.shortcut = nn.Sequential()
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if stride != 1 or in_planes != self.expansion * planes:
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self.shortcut = nn.Sequential(
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nn.Conv2d(
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in_planes, self.expansion * planes, kernel_size=1, stride=stride, bias=False
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),
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nn.BatchNorm2d(self.expansion * planes),
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)
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self.stride = stride
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self.width = width
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self.scale = scale
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def forward(self, x):
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"""Forward pass for training.
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Args:
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x: TODO.
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"""
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residual = x
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out = self.conv1(x)
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out = self.bn1(out)
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out = self.relu(out)
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spx = torch.split(out, self.width, 1)
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for i in range(self.nums):
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if i == 0:
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sp = spx[i]
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else:
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sp = self.fuse_models[i - 1](sp, spx[i])
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sp = self.convs[i](sp)
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sp = self.relu(self.bns[i](sp))
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if i == 0:
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out = sp
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else:
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out = torch.cat((out, sp), 1)
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out = self.conv3(out)
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out = self.bn3(out)
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residual = self.shortcut(x)
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out += residual
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out = self.relu(out)
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return out
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class ERes2NetAug(nn.Module):
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def __init__(
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self,
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block=BasicBlockERes2Net,
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block_fuse=BasicBlockERes2Net_diff_AFF,
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num_blocks=[3, 4, 6, 3],
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m_channels=64,
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feat_dim=80,
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embedding_size=192,
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pooling_func="TSTP",
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two_emb_layer=False,
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):
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"""Initialize ERes2NetAug.
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Args:
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block: TODO.
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block_fuse: TODO.
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num_blocks: TODO.
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m_channels: TODO.
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feat_dim: Size/dimension parameter.
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embedding_size: Size/dimension parameter.
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pooling_func: TODO.
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two_emb_layer: TODO.
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"""
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super(ERes2NetAug, self).__init__()
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self.in_planes = m_channels
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self.feat_dim = feat_dim
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self.embedding_size = embedding_size
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self.stats_dim = int(feat_dim / 8) * m_channels * 8
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self.two_emb_layer = two_emb_layer
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self.conv1 = nn.Conv2d(1, m_channels, kernel_size=3, stride=1, padding=1, bias=False)
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self.bn1 = nn.BatchNorm2d(m_channels)
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self.layer1 = self._make_layer(block, m_channels, num_blocks[0], stride=1)
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self.layer2 = self._make_layer(block, m_channels * 2, num_blocks[1], stride=2)
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self.layer3 = self._make_layer(block_fuse, m_channels * 4, num_blocks[2], stride=2)
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self.layer4 = self._make_layer(block_fuse, m_channels * 8, num_blocks[3], stride=2)
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self.layer1_downsample = nn.Conv2d(
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m_channels * 4, m_channels * 8, kernel_size=3, padding=1, stride=2, bias=False
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)
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self.layer2_downsample = nn.Conv2d(
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m_channels * 8, m_channels * 16, kernel_size=3, padding=1, stride=2, bias=False
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)
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self.layer3_downsample = nn.Conv2d(
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m_channels * 16, m_channels * 32, kernel_size=3, padding=1, stride=2, bias=False
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)
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self.fuse_mode12 = AFF(channels=m_channels * 8)
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self.fuse_mode123 = AFF(channels=m_channels * 16)
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self.fuse_mode1234 = AFF(channels=m_channels * 32)
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self.n_stats = 1 if pooling_func == "TAP" or pooling_func == "TSDP" else 2
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self.pool = getattr(pooling_layers, pooling_func)(in_dim=self.stats_dim * block.expansion)
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self.seg_1 = nn.Linear(self.stats_dim * block.expansion * self.n_stats, embedding_size)
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if self.two_emb_layer:
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self.seg_bn_1 = nn.BatchNorm1d(embedding_size, affine=False)
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self.seg_2 = nn.Linear(embedding_size, embedding_size)
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else:
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self.seg_bn_1 = nn.Identity()
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self.seg_2 = nn.Identity()
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def _make_layer(self, block, planes, num_blocks, stride):
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"""Internal: make layer.
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Args:
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block: TODO.
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planes: TODO.
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num_blocks: TODO.
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stride: TODO.
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"""
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strides = [stride] + [1] * (num_blocks - 1)
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layers = []
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for stride in strides:
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layers.append(block(self.in_planes, planes, stride))
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self.in_planes = planes * block.expansion
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return nn.Sequential(*layers)
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def forward(self, x):
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"""Forward pass for training.
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Args:
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x: TODO.
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"""
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x = x.permute(0, 2, 1) # (B,T,F) => (B,F,T)
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x = x.unsqueeze_(1)
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out = F.relu(self.bn1(self.conv1(x)))
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out1 = self.layer1(out)
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out2 = self.layer2(out1)
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out1_downsample = self.layer1_downsample(out1)
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fuse_out12 = self.fuse_mode12(out2, out1_downsample)
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out3 = self.layer3(out2)
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fuse_out12_downsample = self.layer2_downsample(fuse_out12)
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fuse_out123 = self.fuse_mode123(out3, fuse_out12_downsample)
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out4 = self.layer4(out3)
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fuse_out123_downsample = self.layer3_downsample(fuse_out123)
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fuse_out1234 = self.fuse_mode1234(out4, fuse_out123_downsample)
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stats = self.pool(fuse_out1234)
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embed_a = self.seg_1(stats)
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if self.two_emb_layer:
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out = F.relu(embed_a)
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out = self.seg_bn_1(out)
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embed_b = self.seg_2(out)
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return embed_b
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else:
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return embed_a
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