feat: added model

config.json

@@ -0,0 +1,53 @@
+{
+  "architectures": [
+    "DinoHuVits"
+  ],
+  "auto_map": {
+    "AutoModel": "config.DinoHuVitsConfig"
+  },
+  "gin_channels": 256,
+  "hidden_channels": 192,
+  "hubert_downsample_channels": 192,
+  "hubert_feature_channels": 768,
+  "hubert_output_layer": 11,
+  "inter_channels": 192,
+  "model_type": "DINO-HuVITS",
+  "resblock": "1",
+  "resblock_dilation_sizes": [
+    [
+      1,
+      3,
+      5
+    ],
+    [
+      1,
+      3,
+      5
+    ],
+    [
+      1,
+      3,
+      5
+    ]
+  ],
+  "resblock_kernel_sizes": [
+    3,
+    7,
+    11
+  ],
+  "torch_dtype": "float32",
+  "transformers_version": "4.38.2",
+  "upsample_initial_channel": 512,
+  "upsample_kernel_sizes": [
+    20,
+    16,
+    4,
+    4
+  ],
+  "upsample_rates": [
+    10,
+    8,
+    2,
+    2
+  ]
+}

config.py

@@ -0,0 +1,37 @@
+from transformers import PretrainedConfig
+from typing import List
+
+
+class DinoHuVitsConfig(PretrainedConfig):
+    model_type = "DinoHuVits"
+
+    def __init__(
+        self,
+        inter_channels=192,
+        hidden_channels=192,
+        resblock="1",
+        resblock_kernel_sizes=[3, 7, 11],
+        resblock_dilation_sizes=[[1, 3, 5], [1, 3, 5], [1, 3, 5]],
+        upsample_rates=[10, 8, 2, 2],
+        upsample_initial_channel=512,
+        upsample_kernel_sizes=[20, 16, 4, 4],
+        gin_channels=256,
+        hubert_feature_channels=768,
+        hubert_downsample_channels=192,
+        hubert_output_layer=11,
+        **kwargs
+    ):
+        self.inter_channels = inter_channels
+        self.hidden_channels = hidden_channels
+        self.resblock = resblock
+        self.resblock_kernel_sizes = resblock_kernel_sizes
+        self.resblock_dilation_sizes = resblock_dilation_sizes
+        self.upsample_rates = upsample_rates
+        self.upsample_initial_channel = upsample_initial_channel
+        self.upsample_kernel_sizes = upsample_kernel_sizes
+        self.gin_channels = gin_channels
+
+        self.hubert_feature_channels = hubert_feature_channels
+        self.hubert_downsample_channels = hubert_downsample_channels
+        self.hubert_output_layer = hubert_output_layer
+        super().__init__(**kwargs)

dino_huvits.py

@@ -0,0 +1,54 @@
+import torch
+from transformers import PreTrainedModel
+
+from config import DinoHuVitsConfig
+from src import CAMPPlus, Flow, HiFiGAN, PosteriorHubert
+
+
+class DinoHuVits(PreTrainedModel):
+    config_class = DinoHuVitsConfig
+
+    def __init__(self, config: DinoHuVitsConfig):
+        super().__init__(config)
+
+        self.enc_r = CAMPPlus(embed_dim=config.gin_channels, pooling_func="TSTP")
+        self.enc_q = PosteriorHubert(
+            out_channels=config.inter_channels,
+            feature_channels=config.hubert_feature_channels,
+            downsample_channels=config.hubert_downsample_channels,
+            output_layer=config.hubert_output_layer,
+        )
+        self.flow = Flow(
+            channels=config.inter_channels,
+            hidden_channels=config.hidden_channels,
+            kernel_size=5,
+            dilation_rate=1,
+            n_layers=4,
+            gin_channels=config.gin_channels,
+        )
+        self.dec = HiFiGAN(
+            initial_channel=config.inter_channels,
+            resblock=config.resblock,
+            resblock_kernel_sizes=config.resblock_kernel_sizes,
+            resblock_dilation_sizes=config.resblock_dilation_sizes,
+            upsample_rates=config.upsample_rates,
+            upsample_initial_channel=config.upsample_initial_channel,
+            upsample_kernel_sizes=config.upsample_kernel_sizes,
+            gin_channels=config.gin_channels,
+        )
+
+    def forward(
+        self, content: torch.Tensor, lengths: torch.Tensor, reference: torch.Tensor
+    ):
+        g_src = self.__get_style_embedding(content)
+        g_tgt = self.__get_style_embedding(reference)
+        z, _, _, y_mask = self.enc_q(content, lengths, g=g_src)
+        z_p = self.flow(z, y_mask, g=g_src)
+        z_hat = self.flow(z_p, y_mask, g=g_tgt, reverse=True)
+        o_hat = self.dec(z_hat * y_mask, g=g_tgt)
+        return o_hat, y_mask
+
+    def __get_style_embedding(self, wavefrom: torch.Tensor):
+        g = self.enc_r(wavefrom)  # [b, h, 1]
+        g = torch.nn.functional.normalize(g, dim=1)
+        return g.unsqueeze(-1)

model.safetensors

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ecb11979e09bbd727f5fac56234beb2f25ee5d7ab572eebecd5cf061f538eef7
+size 513863296

module/__init__.py

@@ -0,0 +1,561 @@
+import copy
+import math
+
+import numpy as np
+import scipy
+import torch
+from torch import nn
+from torch.nn import AvgPool1d, Conv1d, Conv2d, ConvTranspose1d
+from torch.nn import functional as F
+from torch.nn.utils import remove_weight_norm, weight_norm
+
+from tools import commons
+from tools.commons import get_padding, init_weights
+from tools.transforms import piecewise_rational_quadratic_transform
+
+
+LRELU_SLOPE = 0.1
+
+
+class LayerNorm(nn.Module):
+    def __init__(self, channels, eps=1e-5):
+        super().__init__()
+        self.channels = channels
+        self.eps = eps
+
+        self.gamma = nn.Parameter(torch.ones(channels))
+        self.beta = nn.Parameter(torch.zeros(channels))
+
+    def forward(self, x):
+        x = x.transpose(1, -1).contiguous()
+        x = F.layer_norm(x, (self.channels,), self.gamma, self.beta, self.eps)
+        return x.transpose(1, -1).contiguous()
+
+
+class ConvReluNorm(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        hidden_channels,
+        out_channels,
+        kernel_size,
+        n_layers,
+        p_dropout,
+    ):
+        super().__init__()
+        self.in_channels = in_channels
+        self.hidden_channels = hidden_channels
+        self.out_channels = out_channels
+        self.kernel_size = kernel_size
+        self.n_layers = n_layers
+        self.p_dropout = p_dropout
+        assert n_layers > 1, "Number of layers should be larger than 0."
+
+        self.conv_layers = nn.ModuleList()
+        self.norm_layers = nn.ModuleList()
+        self.conv_layers.append(
+            nn.Conv1d(
+                in_channels, hidden_channels, kernel_size, padding=kernel_size // 2
+            )
+        )
+        self.norm_layers.append(LayerNorm(hidden_channels))
+        self.relu_drop = nn.Sequential(nn.ReLU(), nn.Dropout(p_dropout))
+        for _ in range(n_layers - 1):
+            self.conv_layers.append(
+                nn.Conv1d(
+                    hidden_channels,
+                    hidden_channels,
+                    kernel_size,
+                    padding=kernel_size // 2,
+                )
+            )
+            self.norm_layers.append(LayerNorm(hidden_channels))
+        self.proj = nn.Conv1d(hidden_channels, out_channels, 1)
+        self.proj.weight.data.zero_()
+        self.proj.bias.data.zero_()
+
+    def forward(self, x, x_mask):
+        x_org = x
+        for i in range(self.n_layers):
+            x = self.conv_layers[i](x * x_mask)
+            x = self.norm_layers[i](x)
+            x = self.relu_drop(x)
+        x = x_org + self.proj(x)
+        return x * x_mask
+
+
+class DDSConv(nn.Module):
+    """
+    Dialted and Depth-Separable Convolution
+    """
+
+    def __init__(self, channels, kernel_size, n_layers, p_dropout=0.0):
+        super().__init__()
+        self.channels = channels
+        self.kernel_size = kernel_size
+        self.n_layers = n_layers
+        self.p_dropout = p_dropout
+
+        self.drop = nn.Dropout(p_dropout)
+        self.convs_sep = nn.ModuleList()
+        self.convs_1x1 = nn.ModuleList()
+        self.norms_2 = nn.ModuleList()
+        for i in range(n_layers):
+            dilation = kernel_size**i
+
+            padding = (kernel_size * dilation - dilation) // 2
+            conv = nn.Conv1d(
+                channels,
+                channels,
+                kernel_size,
+                groups=channels,
+                dilation=dilation,
+                padding=padding,
+            )
+            self.convs_sep.append(conv)
+            self.convs_1x1.append(nn.Conv1d(channels, channels, 1))
+            self.norms_2.append(LayerNorm(channels))
+
+    def forward(self, x, x_mask, g=None):
+        if g is not None:
+            x = x + g
+        for i in range(self.n_layers):
+            y = self.convs_sep[i](x * x_mask)
+            y = F.gelu(y)
+            y = self.convs_1x1[i](y)
+            y = self.norms_2[i](y)
+            y = F.gelu(y)
+            y = self.drop(y)
+            x = x + y
+        return x * x_mask
+
+
+class WN(torch.nn.Module):
+    def __init__(
+        self,
+        hidden_channels,
+        kernel_size,
+        dilation_rate,
+        n_layers,
+        gin_channels=0,
+        p_dropout=0,
+    ):
+        super(WN, self).__init__()
+        assert kernel_size % 2 == 1
+        self.hidden_channels = hidden_channels
+        self.kernel_size = (kernel_size,)
+        self.dilation_rate = dilation_rate
+        self.n_layers = n_layers
+        self.gin_channels = gin_channels
+        self.p_dropout = p_dropout
+
+        self.in_layers = torch.nn.ModuleList()
+        self.res_skip_layers = torch.nn.ModuleList()
+        self.drop = nn.Dropout(p_dropout)
+
+        if gin_channels != 0:
+            cond_layer = torch.nn.Conv1d(
+                gin_channels, 2 * hidden_channels * n_layers, 1
+            )
+            self.cond_layer = torch.nn.utils.weight_norm(cond_layer, name="weight")
+
+        for i in range(n_layers):
+            dilation = dilation_rate**i
+            padding = int((kernel_size * dilation - dilation) / 2)
+
+            in_layer = Conv1d(
+                hidden_channels,
+                2 * hidden_channels,
+                kernel_size,
+                padding=padding,
+                dilation=dilation,
+            )
+            in_layer = torch.nn.utils.weight_norm(in_layer, name="weight")
+            self.in_layers.append(in_layer)
+
+            # last one is not necessary
+            if i < n_layers - 1:
+                res_skip_channels = 2 * hidden_channels
+            else:
+                res_skip_channels = hidden_channels
+
+            res_skip_layer = torch.nn.Conv1d(hidden_channels, res_skip_channels, 1)
+            res_skip_layer = torch.nn.utils.weight_norm(res_skip_layer, name="weight")
+            self.res_skip_layers.append(res_skip_layer)
+
+    def forward(self, x, x_mask, g=None, **kwargs):
+        output = torch.zeros_like(x)
+        n_channels_tensor = torch.IntTensor([self.hidden_channels])
+
+        if g is not None:
+            g = self.cond_layer(g)
+
+        for i in range(self.n_layers):
+            x_in = self.in_layers[i](x)
+            if g is not None:
+                cond_offset = i * 2 * self.hidden_channels
+                g_l = g[:, cond_offset : cond_offset + 2 * self.hidden_channels, :]
+            else:
+                g_l = torch.zeros_like(x_in)
+
+            acts = commons.fused_add_tanh_sigmoid_multiply(x_in, g_l, n_channels_tensor)
+            acts = self.drop(acts)
+
+            res_skip_acts = self.res_skip_layers[i](acts)
+            if i < self.n_layers - 1:
+                res_acts = res_skip_acts[:, : self.hidden_channels, :]
+                x = (x + res_acts) * x_mask
+                output = output + res_skip_acts[:, self.hidden_channels :, :]
+            else:
+                output = output + res_skip_acts
+        return output * x_mask
+
+    def remove_weight_norm(self):
+        if self.gin_channels != 0:
+            torch.nn.utils.remove_weight_norm(self.cond_layer)
+        for l in self.in_layers:
+            torch.nn.utils.remove_weight_norm(l)
+        for l in self.res_skip_layers:
+            torch.nn.utils.remove_weight_norm(l)
+
+
+class Log(nn.Module):
+    def forward(self, x, x_mask, reverse=False, **kwargs):
+        if not reverse:
+            y = torch.log(torch.clamp_min(x, 1e-5)) * x_mask
+            logdet = torch.sum(-y, [1, 2])
+            return y, logdet
+        else:
+            x = torch.exp(x) * x_mask
+            return x
+
+
+class Flip(nn.Module):
+    def forward(self, x, *args, reverse=False, **kwargs):
+        x = torch.flip(x, [1])
+        if not reverse:
+            logdet = torch.zeros(x.size(0)).to(dtype=x.dtype, device=x.device)
+            return x, logdet
+        else:
+            return x
+
+
+class ElementwiseAffine(nn.Module):
+    def __init__(self, channels):
+        super().__init__()
+        self.channels = channels
+        self.m = nn.Parameter(torch.zeros(channels, 1))
+        self.logs = nn.Parameter(torch.zeros(channels, 1))
+
+    def forward(self, x, x_mask, reverse=False, **kwargs):
+        if not reverse:
+            y = self.m + torch.exp(self.logs) * x
+            y = y * x_mask
+            logdet = torch.sum(self.logs * x_mask, [1, 2])
+            return y, logdet
+        else:
+            x = (x - self.m) * torch.exp(-self.logs) * x_mask
+            return x
+
+
+class ResidualCouplingLayer(nn.Module):
+    def __init__(
+        self,
+        channels,
+        hidden_channels,
+        kernel_size,
+        dilation_rate,
+        n_layers,
+        p_dropout=0,
+        gin_channels=0,
+        mean_only=False,
+    ):
+        assert channels % 2 == 0, "channels should be divisible by 2"
+        super().__init__()
+        self.channels = channels
+        self.hidden_channels = hidden_channels
+        self.kernel_size = kernel_size
+        self.dilation_rate = dilation_rate
+        self.n_layers = n_layers
+        self.half_channels = channels // 2
+        self.mean_only = mean_only
+
+        self.pre = nn.Conv1d(self.half_channels, hidden_channels, 1)
+        self.enc = WN(
+            hidden_channels,
+            kernel_size,
+            dilation_rate,
+            n_layers,
+            p_dropout=p_dropout,
+            gin_channels=gin_channels,
+        )
+        self.post = nn.Conv1d(hidden_channels, self.half_channels * (2 - mean_only), 1)
+        self.post.weight.data.zero_()
+        self.post.bias.data.zero_()
+
+    def forward(self, x, x_mask, g=None, reverse=False):
+        x0, x1 = torch.split(x, [self.half_channels] * 2, 1)
+        h = self.pre(x0) * x_mask
+        h = self.enc(h, x_mask, g=g)
+        stats = self.post(h) * x_mask
+        if not self.mean_only:
+            m, logs = torch.split(stats, [self.half_channels] * 2, 1)
+        else:
+            m = stats
+            logs = torch.zeros_like(m)
+
+        if not reverse:
+            x1 = m + x1 * torch.exp(logs) * x_mask
+            x = torch.cat([x0, x1], 1)
+            logdet = torch.sum(logs, [1, 2])
+            return x, logdet
+        else:
+            x1 = (x1 - m) * torch.exp(-logs) * x_mask
+            x = torch.cat([x0, x1], 1)
+            return x
+
+
+class ConvFlow(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        filter_channels,
+        kernel_size,
+        n_layers,
+        num_bins=10,
+        tail_bound=5.0,
+    ):
+        super().__init__()
+        self.in_channels = in_channels
+        self.filter_channels = filter_channels
+        self.kernel_size = kernel_size
+        self.n_layers = n_layers
+        self.num_bins = num_bins
+        self.tail_bound = tail_bound
+        self.half_channels = in_channels // 2
+
+        self.pre = nn.Conv1d(self.half_channels, filter_channels, 1)
+        self.convs = DDSConv(filter_channels, kernel_size, n_layers, p_dropout=0.0)
+        self.proj = nn.Conv1d(
+            filter_channels, self.half_channels * (num_bins * 3 - 1), 1
+        )
+        self.proj.weight.data.zero_()
+        self.proj.bias.data.zero_()
+
+    def forward(self, x, x_mask, g=None, reverse=False):
+        x0, x1 = torch.split(x, [self.half_channels] * 2, 1)
+
+        h = self.pre(x0)
+        h = self.convs(h, x_mask, g=g)
+        h = self.proj(h) * x_mask
+
+        b, c, t = x0.shape
+        h = (
+            h.reshape(b, c, -1, t).permute(0, 1, 3, 2).contiguous()
+        )  # [b, cx?, t] -> [b, c, t, ?]
+
+        unnormalized_widths = h[..., : self.num_bins] / math.sqrt(self.filter_channels)
+        unnormalized_heights = h[..., self.num_bins : 2 * self.num_bins] / math.sqrt(
+            self.filter_channels
+        )
+        unnormalized_derivatives = h[..., 2 * self.num_bins :]
+
+        x1, logabsdet = piecewise_rational_quadratic_transform(
+            x1,
+            unnormalized_widths,
+            unnormalized_heights,
+            unnormalized_derivatives,
+            inverse=reverse,
+            tails="linear",
+            tail_bound=self.tail_bound,
+        )
+
+        x = torch.cat([x0, x1], 1) * x_mask
+        logdet = torch.sum(logabsdet * x_mask, [1, 2])
+        if not reverse:
+            return x, logdet
+        else:
+            return x
+
+
+class LinearNorm(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        out_channels,
+        bias=True,
+        spectral_norm=False,
+    ):
+        super(LinearNorm, self).__init__()
+        self.fc = nn.Linear(in_channels, out_channels, bias)
+
+        if spectral_norm:
+            self.fc = nn.utils.spectral_norm(self.fc)
+
+    def forward(self, input):
+        out = self.fc(input)
+        return out
+
+
+class Mish(nn.Module):
+    def __init__(self):
+        super(Mish, self).__init__()
+
+    def forward(self, x):
+        return x * torch.tanh(F.softplus(x))
+
+
+class LinearNorm(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        out_channels,
+        bias=True,
+        spectral_norm=False,
+    ):
+        super(LinearNorm, self).__init__()
+        self.fc = nn.Linear(in_channels, out_channels, bias)
+
+        if spectral_norm:
+            self.fc = nn.utils.spectral_norm(self.fc)
+
+    def forward(self, input):
+        out = self.fc(input)
+        return out
+
+
+class ConvNorm(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        out_channels,
+        kernel_size=1,
+        stride=1,
+        padding=None,
+        dilation=1,
+        bias=True,
+        spectral_norm=False,
+    ):
+        super(ConvNorm, self).__init__()
+
+        if padding is None:
+            assert kernel_size % 2 == 1
+            padding = int(dilation * (kernel_size - 1) / 2)
+
+        self.conv = torch.nn.Conv1d(
+            in_channels,
+            out_channels,
+            kernel_size=kernel_size,
+            stride=stride,
+            padding=padding,
+            dilation=dilation,
+            bias=bias,
+        )
+
+        if spectral_norm:
+            self.conv = nn.utils.spectral_norm(self.conv)
+
+    def forward(self, input):
+        out = self.conv(input)
+        return out
+
+
+class MultiHeadAttention(nn.Module):
+    """Multi-Head Attention module"""
+
+    def __init__(self, n_head, d_model, d_k, d_v, dropout=0.0, spectral_norm=False):
+        super().__init__()
+
+        self.n_head = n_head
+        self.d_k = d_k
+        self.d_v = d_v
+
+        self.w_qs = nn.Linear(d_model, n_head * d_k)
+        self.w_ks = nn.Linear(d_model, n_head * d_k)
+        self.w_vs = nn.Linear(d_model, n_head * d_v)
+
+        self.attention = ScaledDotProductAttention(
+            temperature=np.power(d_model, 0.5), dropout=dropout
+        )
+
+        self.fc = nn.Linear(n_head * d_v, d_model)
+        self.dropout = nn.Dropout(dropout)
+
+        if spectral_norm:
+            self.w_qs = nn.utils.spectral_norm(self.w_qs)
+            self.w_ks = nn.utils.spectral_norm(self.w_ks)
+            self.w_vs = nn.utils.spectral_norm(self.w_vs)
+            self.fc = nn.utils.spectral_norm(self.fc)
+
+    def forward(self, x, mask=None):
+        d_k, d_v, n_head = self.d_k, self.d_v, self.n_head
+        sz_b, len_x, _ = x.size()
+
+        residual = x
+
+        q = self.w_qs(x).view(sz_b, len_x, n_head, d_k)
+        k = self.w_ks(x).view(sz_b, len_x, n_head, d_k)
+        v = self.w_vs(x).view(sz_b, len_x, n_head, d_v)
+        q = q.permute(2, 0, 1, 3).contiguous().view(-1, len_x, d_k)  # (n*b) x lq x dk
+        k = k.permute(2, 0, 1, 3).contiguous().view(-1, len_x, d_k)  # (n*b) x lk x dk
+        v = v.permute(2, 0, 1, 3).contiguous().view(-1, len_x, d_v)  # (n*b) x lv x dv
+
+        if mask is not None:
+            slf_mask = mask.repeat(n_head, 1, 1)  # (n*b) x .. x ..
+        else:
+            slf_mask = None
+        output, attn = self.attention(q, k, v, mask=slf_mask)
+
+        output = output.view(n_head, sz_b, len_x, d_v)
+        output = (
+            output.permute(1, 2, 0, 3).contiguous().view(sz_b, len_x, -1)
+        )  # b x lq x (n*dv)
+
+        output = self.fc(output)
+
+        output = self.dropout(output) + residual
+        return output, attn
+
+
+class ScaledDotProductAttention(nn.Module):
+    """Scaled Dot-Product Attention"""
+
+    def __init__(self, temperature, dropout):
+        super().__init__()
+        self.temperature = temperature
+        self.softmax = nn.Softmax(dim=2)
+        self.dropout = nn.Dropout(dropout)
+
+    def forward(self, q, k, v, mask=None):
+        attn = torch.bmm(q, k.transpose(1, 2).contiguous())
+        attn = attn / self.temperature
+
+        if mask is not None:
+            attn = attn.masked_fill(mask, -np.inf)
+
+        attn = self.softmax(attn)
+        p_attn = self.dropout(attn)
+
+        output = torch.bmm(p_attn, v)
+        return output, attn
+
+
+class Conv1dGLU(nn.Module):
+    """
+    Conv1d + GLU(Gated Linear Unit) with residual connection.
+    For GLU refer to https://arxiv.org/abs/1612.08083 paper.
+    """
+
+    def __init__(self, in_channels, out_channels, kernel_size, dropout):
+        super(Conv1dGLU, self).__init__()
+        self.out_channels = out_channels
+        self.conv1 = ConvNorm(in_channels, 2 * out_channels, kernel_size=kernel_size)
+        self.dropout = nn.Dropout(dropout)
+
+    def forward(self, x):
+        residual = x
+        x = self.conv1(x)
+        x1, x2 = torch.split(x, split_size_or_sections=self.out_channels, dim=1)
+        x = x1 * torch.sigmoid(x2)
+        x = residual + self.dropout(x)
+        return x

module/resblocks.py

@@ -0,0 +1,150 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from torch.nn import Conv1d
+from torch.nn.utils import remove_weight_norm, weight_norm
+
+from . import LRELU_SLOPE
+from tools.commons import get_padding, init_weights
+
+
+class ResBlock1(torch.nn.Module):
+    def __init__(self, channels, kernel_size=3, dilation=(1, 3, 5)):
+        super(ResBlock1, self).__init__()
+        self.convs1 = nn.ModuleList(
+            [
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=dilation[0],
+                        padding=get_padding(kernel_size, dilation[0]),
+                    )
+                ),
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=dilation[1],
+                        padding=get_padding(kernel_size, dilation[1]),
+                    )
+                ),
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=dilation[2],
+                        padding=get_padding(kernel_size, dilation[2]),
+                    )
+                ),
+            ]
+        )
+        self.convs1.apply(init_weights)
+
+        self.convs2 = nn.ModuleList(
+            [
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=1,
+                        padding=get_padding(kernel_size, 1),
+                    )
+                ),
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=1,
+                        padding=get_padding(kernel_size, 1),
+                    )
+                ),
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=1,
+                        padding=get_padding(kernel_size, 1),
+                    )
+                ),
+            ]
+        )
+        self.convs2.apply(init_weights)
+
+    def forward(self, x, x_mask=None):
+        for c1, c2 in zip(self.convs1, self.convs2):
+            xt = F.leaky_relu(x, LRELU_SLOPE)
+            if x_mask is not None:
+                xt = xt * x_mask
+            xt = c1(xt)
+            xt = F.leaky_relu(xt, LRELU_SLOPE)
+            if x_mask is not None:
+                xt = xt * x_mask
+            xt = c2(xt)
+            x = xt + x
+        if x_mask is not None:
+            x = x * x_mask
+        return x
+
+    def remove_weight_norm(self):
+        for l in self.convs1:
+            remove_weight_norm(l)
+        for l in self.convs2:
+            remove_weight_norm(l)
+
+
+class ResBlock2(torch.nn.Module):
+    def __init__(self, channels, kernel_size=3, dilation=(1, 3)):
+        super(ResBlock2, self).__init__()
+        self.convs = nn.ModuleList(
+            [
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=dilation[0],
+                        padding=get_padding(kernel_size, dilation[0]),
+                    )
+                ),
+                weight_norm(
+                    Conv1d(
+                        channels,
+                        channels,
+                        kernel_size,
+                        1,
+                        dilation=dilation[1],
+                        padding=get_padding(kernel_size, dilation[1]),
+                    )
+                ),
+            ]
+        )
+        self.convs.apply(init_weights)
+
+    def forward(self, x, x_mask=None):
+        for c in self.convs:
+            xt = F.leaky_relu(x, LRELU_SLOPE)
+            if x_mask is not None:
+                xt = xt * x_mask
+            xt = c(xt)
+            x = xt + x
+        if x_mask is not None:
+            x = x * x_mask
+        return x
+
+    def remove_weight_norm(self):
+        for l in self.convs:
+            remove_weight_norm(l)

src/__init__.py

@@ -0,0 +1,4 @@
+from .campplus import CAMPPlus
+from .flow import ResidualCouplingBlock as Flow
+from .hifi_gan import Generator as HiFiGAN
+from .hubert_posterior import PosteriorHubert

src/attentions.py

@@ -0,0 +1,219 @@
+import math
+
+import torch
+from torch import nn
+from torch.nn import functional as F
+
+import tools.commons as commons
+
+
+class MultiHeadAttention(nn.Module):
+    def __init__(
+        self,
+        channels,
+        out_channels,
+        n_heads,
+        p_dropout=0.0,
+        window_size=None,
+        heads_share=True,
+        block_length=None,
+        proximal_bias=False,
+        proximal_init=False,
+    ):
+        super().__init__()
+        assert channels % n_heads == 0
+
+        self.channels = channels
+        self.out_channels = out_channels
+        self.n_heads = n_heads
+        self.p_dropout = p_dropout
+        self.window_size = window_size
+        self.heads_share = heads_share
+        self.block_length = block_length
+        self.proximal_bias = proximal_bias
+        self.proximal_init = proximal_init
+        self.attn = None
+
+        self.k_channels = channels // n_heads
+        self.conv_q = nn.Conv1d(channels, channels, 1)
+        self.conv_k = nn.Conv1d(channels, channels, 1)
+        self.conv_v = nn.Conv1d(channels, channels, 1)
+        self.conv_o = nn.Conv1d(channels, out_channels, 1)
+        self.drop = nn.Dropout(p_dropout)
+
+        if window_size is not None:
+            n_heads_rel = 1 if heads_share else n_heads
+            rel_stddev = self.k_channels**-0.5
+            self.emb_rel_k = nn.Parameter(
+                torch.randn(n_heads_rel, window_size * 2 + 1, self.k_channels)
+                * rel_stddev
+            )
+            self.emb_rel_v = nn.Parameter(
+                torch.randn(n_heads_rel, window_size * 2 + 1, self.k_channels)
+                * rel_stddev
+            )
+
+        nn.init.xavier_uniform_(self.conv_q.weight)
+        nn.init.xavier_uniform_(self.conv_k.weight)
+        nn.init.xavier_uniform_(self.conv_v.weight)
+        if proximal_init:
+            with torch.no_grad():
+                self.conv_k.weight.copy_(self.conv_q.weight)
+                self.conv_k.bias.copy_(self.conv_q.bias)
+
+    def forward(self, x, c, attn_mask=None):
+        q = self.conv_q(x)
+        k = self.conv_k(c)
+        v = self.conv_v(c)
+
+        x, self.attn = self.attention(q, k, v, mask=attn_mask)
+
+        x = self.conv_o(x)
+        return x
+
+    def attention(self, query, key, value, mask=None):
+        # reshape [b, d, t] -> [b, n_h, t, d_k]
+        b, d, t_s, t_t = (*key.size(), query.size(2))
+        query = (
+            query.view(b, self.n_heads, self.k_channels, t_t)
+            .transpose(2, 3)
+            .contiguous()
+        )
+        key = (
+            key.view(b, self.n_heads, self.k_channels, t_s).transpose(2, 3).contiguous()
+        )
+        value = (
+            value.view(b, self.n_heads, self.k_channels, t_s)
+            .transpose(2, 3)
+            .contiguous()
+        )
+
+        scores = torch.matmul(
+            query / math.sqrt(self.k_channels), key.transpose(-2, -1).contiguous()
+        )
+        if self.window_size is not None:
+            assert (
+                t_s == t_t
+            ), "Relative attention is only available for self-attention."
+            key_relative_embeddings = self._get_relative_embeddings(self.emb_rel_k, t_s)
+            rel_logits = self._matmul_with_relative_keys(
+                query / math.sqrt(self.k_channels), key_relative_embeddings
+            )
+            scores_local = self._relative_position_to_absolute_position(rel_logits)
+            scores = scores + scores_local
+        if self.proximal_bias:
+            assert t_s == t_t, "Proximal bias is only available for self-attention."
+            scores = scores + self._attention_bias_proximal(t_s).to(
+                device=scores.device, dtype=scores.dtype
+            )
+        if mask is not None:
+            scores = scores.masked_fill(mask == 0, -1e4)
+            if self.block_length is not None:
+                assert (
+                    t_s == t_t
+                ), "Local attention is only available for self-attention."
+                block_mask = (
+                    torch.ones_like(scores)
+                    .triu(-self.block_length)
+                    .tril(self.block_length)
+                )
+                scores = scores.masked_fill(block_mask == 0, -1e4)
+        p_attn = F.softmax(scores, dim=-1)  # [b, n_h, t_t, t_s]
+        p_attn = self.drop(p_attn)
+        output = torch.matmul(p_attn, value)
+        if self.window_size is not None:
+            relative_weights = self._absolute_position_to_relative_position(p_attn)
+            value_relative_embeddings = self._get_relative_embeddings(
+                self.emb_rel_v, t_s
+            )
+            output = output + self._matmul_with_relative_values(
+                relative_weights, value_relative_embeddings
+            )
+        output = (
+            output.transpose(2, 3).contiguous().view(b, d, t_t).contiguous()
+        )  # [b, n_h, t_t, d_k] -> [b, d, t_t]
+        return output, p_attn
+
+    def _matmul_with_relative_values(self, x, y):
+        """
+        x: [b, h, l, m]
+        y: [h or 1, m, d]
+        ret: [b, h, l, d]
+        """
+        ret = torch.matmul(x, y.unsqueeze(0))
+        return ret
+
+    def _matmul_with_relative_keys(self, x, y):
+        """
+        x: [b, h, l, d]
+        y: [h or 1, m, d]
+        ret: [b, h, l, m]
+        """
+        ret = torch.matmul(x, y.unsqueeze(0).transpose(-2, -1).contiguous())
+        return ret
+
+    def _get_relative_embeddings(self, relative_embeddings, length):
+        max_relative_position = 2 * self.window_size + 1
+        # Pad first before slice to avoid using cond ops.
+        pad_length = max(length - (self.window_size + 1), 0)
+        slice_start_position = max((self.window_size + 1) - length, 0)
+        slice_end_position = slice_start_position + 2 * length - 1
+        if pad_length > 0:
+            padded_relative_embeddings = F.pad(
+                relative_embeddings,
+                commons.convert_pad_shape([[0, 0], [pad_length, pad_length], [0, 0]]),
+            )
+        else:
+            padded_relative_embeddings = relative_embeddings
+        used_relative_embeddings = padded_relative_embeddings[
+            :, slice_start_position:slice_end_position
+        ]
+        return used_relative_embeddings
+
+    def _relative_position_to_absolute_position(self, x):
+        """
+        x: [b, h, l, 2*l-1]
+        ret: [b, h, l, l]
+        """
+        batch, heads, length, _ = x.size()
+        # Concat columns of pad to shift from relative to absolute indexing.
+        x = F.pad(x, commons.convert_pad_shape([[0, 0], [0, 0], [0, 0], [0, 1]]))
+
+        # Concat extra elements so to add up to shape (len+1, 2*len-1).
+        x_flat = x.view([batch, heads, length * 2 * length])
+        x_flat = F.pad(
+            x_flat, commons.convert_pad_shape([[0, 0], [0, 0], [0, length - 1]])
+        )
+
+        # Reshape and slice out the padded elements.
+        x_final = x_flat.view([batch, heads, length + 1, 2 * length - 1])[
+            :, :, :length, length - 1 :
+        ]
+        return x_final
+
+    def _absolute_position_to_relative_position(self, x):
+        """
+        x: [b, h, l, l]
+        ret: [b, h, l, 2*l-1]
+        """
+        batch, heads, length, _ = x.size()
+        # padd along column
+        x = F.pad(
+            x, commons.convert_pad_shape([[0, 0], [0, 0], [0, 0], [0, length - 1]])
+        )
+        x_flat = x.view([batch, heads, length**2 + length * (length - 1)])
+        # add 0's in the beginning that will skew the elements after reshape
+        x_flat = F.pad(x_flat, commons.convert_pad_shape([[0, 0], [0, 0], [length, 0]]))
+        x_final = x_flat.view([batch, heads, length, 2 * length])[:, :, :, 1:]
+        return x_final
+
+    def _attention_bias_proximal(self, length):
+        """Bias for self-attention to encourage attention to close positions.
+        Args:
+          length: an integer scalar.
+        Returns:
+          a Tensor with shape [1, 1, length, length]
+        """
+        r = torch.arange(length, dtype=torch.float32)
+        diff = torch.unsqueeze(r, 0) - torch.unsqueeze(r, 1)
+        return torch.unsqueeze(torch.unsqueeze(-torch.log1p(torch.abs(diff)), 0), 0)

src/campplus.py

@@ -0,0 +1,407 @@
+# Copyright (c) 2023 Hongji Wang (jijijiang77@gmail.com)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+This implementation is adapted from github repo:
+https://github.com/alibaba-damo-academy/3D-Speaker
+
+Some modifications:
+1. Reuse the pooling layers in wespeaker
+2. Remove the memory_efficient mechanism to meet the torch.jit.script
+   export requirements
+
+Reference:
+[1] Hui Wang, Siqi Zheng, Yafeng Chen, Luyao Cheng and Qian Chen.
+    "CAM++: A Fast and Efficient Network for Speaker Verification
+    Using Context-Aware Masking". arXiv preprint arXiv:2303.00332
+"""
+
+from collections import OrderedDict
+
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+from .wespeaker_campplus import pooling_layers
+from .wespeaker_campplus.fbank_feature_extractor import FbankFeatureExtractor
+
+
+def get_nonlinear(config_str, channels):
+    nonlinear = nn.Sequential()
+    for name in config_str.split("-"):
+        if name == "relu":
+            nonlinear.add_module("relu", nn.ReLU(inplace=True))
+        elif name == "prelu":
+            nonlinear.add_module("prelu", nn.PReLU(channels))
+        elif name == "batchnorm":
+            nonlinear.add_module("batchnorm", nn.BatchNorm1d(channels))
+        elif name == "batchnorm_":
+            nonlinear.add_module("batchnorm", nn.BatchNorm1d(channels, affine=False))
+        else:
+            raise ValueError("Unexpected module ({}).".format(name))
+    return nonlinear
+
+
+class TDNNLayer(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        out_channels,
+        kernel_size,
+        stride=1,
+        padding=0,
+        dilation=1,
+        bias=False,
+        config_str="batchnorm-relu",
+    ):
+        super(TDNNLayer, self).__init__()
+        if padding < 0:
+            assert (
+                kernel_size % 2 == 1
+            ), "Expect equal paddings, \
+                    but got even kernel size ({})".format(
+                kernel_size
+            )
+            padding = (kernel_size - 1) // 2 * dilation
+        self.linear = nn.Conv1d(
+            in_channels,
+            out_channels,
+            kernel_size,
+            stride=stride,
+            padding=padding,
+            dilation=dilation,
+            bias=bias,
+        )
+        self.nonlinear = get_nonlinear(config_str, out_channels)
+
+    def forward(self, x):
+        x = self.linear(x)
+        x = self.nonlinear(x)
+        return x
+
+
+class CAMLayer(nn.Module):
+    def __init__(
+        self,
+        bn_channels,
+        out_channels,
+        kernel_size,
+        stride,
+        padding,
+        dilation,
+        bias,
+        reduction=2,
+    ):
+        super(CAMLayer, self).__init__()
+        self.linear_local = nn.Conv1d(
+            bn_channels,
+            out_channels,
+            kernel_size,
+            stride=stride,
+            padding=padding,
+            dilation=dilation,
+            bias=bias,
+        )
+        self.linear1 = nn.Conv1d(bn_channels, bn_channels // reduction, 1)
+        self.relu = nn.ReLU(inplace=True)
+        self.linear2 = nn.Conv1d(bn_channels // reduction, out_channels, 1)
+        self.sigmoid = nn.Sigmoid()
+
+    def forward(self, x):
+        y = self.linear_local(x)
+        context = x.mean(-1, keepdim=True) + self.seg_pooling(x)
+        context = self.relu(self.linear1(context))
+        m = self.sigmoid(self.linear2(context))
+        return y * m
+
+    def seg_pooling(self, x, seg_len: int = 100, stype: str = "avg"):
+        if stype == "avg":
+            seg = F.avg_pool1d(x, kernel_size=seg_len, stride=seg_len, ceil_mode=True)
+        elif stype == "max":
+            seg = F.max_pool1d(x, kernel_size=seg_len, stride=seg_len, ceil_mode=True)
+        else:
+            raise ValueError("Wrong segment pooling type.")
+        shape = seg.shape
+        seg = (
+            seg.unsqueeze(-1)
+            .expand(shape[0], shape[1], shape[2], seg_len)
+            .reshape(shape[0], shape[1], -1)
+        )
+        seg = seg[..., : x.shape[-1]]
+        return seg
+
+
+class CAMDenseTDNNLayer(nn.Module):
+    def __init__(
+        self,
+        in_channels,
+        out_channels,
+        bn_channels,
+        kernel_size,
+        stride=1,
+        dilation=1,
+        bias=False,
+        config_str="batchnorm-relu",
+    ):
+        super(CAMDenseTDNNLayer, self).__init__()
+        assert (
+            kernel_size % 2 == 1
+        ), "Expect equal paddings, \
+                but got even kernel size ({})".format(
+            kernel_size
+        )
+        padding = (kernel_size - 1) // 2 * dilation
+        self.nonlinear1 = get_nonlinear(config_str, in_channels)
+        self.linear1 = nn.Conv1d(in_channels, bn_channels, 1, bias=False)
+        self.nonlinear2 = get_nonlinear(config_str, bn_channels)
+        self.cam_layer = CAMLayer(
+            bn_channels,
+            out_channels,
+            kernel_size,
+            stride=stride,
+            padding=padding,
+            dilation=dilation,
+            bias=bias,
+        )
+
+    def bn_function(self, x):
+        return self.linear1(self.nonlinear1(x))
+
+    def forward(self, x):
+        x = self.bn_function(x)
+        x = self.cam_layer(self.nonlinear2(x))
+        return x
+
+
+class CAMDenseTDNNBlock(nn.ModuleList):
+    def __init__(
+        self,
+        num_layers,
+        in_channels,
+        out_channels,
+        bn_channels,
+        kernel_size,
+        stride=1,
+        dilation=1,
+        bias=False,
+        config_str="batchnorm-relu",
+    ):
+        super(CAMDenseTDNNBlock, self).__init__()
+        for i in range(num_layers):
+            layer = CAMDenseTDNNLayer(
+                in_channels=in_channels + i * out_channels,
+                out_channels=out_channels,
+                bn_channels=bn_channels,
+                kernel_size=kernel_size,
+                stride=stride,
+                dilation=dilation,
+                bias=bias,
+                config_str=config_str,
+            )
+            self.add_module("tdnnd%d" % (i + 1), layer)
+
+    def forward(self, x):
+        for layer in self:
+            x = torch.cat([x, layer(x)], dim=1)
+        return x
+
+
+class TransitLayer(nn.Module):
+    def __init__(
+        self, in_channels, out_channels, bias=True, config_str="batchnorm-relu"
+    ):
+        super(TransitLayer, self).__init__()
+        self.nonlinear = get_nonlinear(config_str, in_channels)
+        self.linear = nn.Conv1d(in_channels, out_channels, 1, bias=bias)
+
+    def forward(self, x):
+        x = self.nonlinear(x)
+        x = self.linear(x)
+        return x
+
+
+class DenseLayer(nn.Module):
+    def __init__(
+        self, in_channels, out_channels, bias=False, config_str="batchnorm-relu"
+    ):
+        super(DenseLayer, self).__init__()
+        self.linear = nn.Conv1d(in_channels, out_channels, 1, bias=bias)
+        self.nonlinear = get_nonlinear(config_str, out_channels)
+
+    def forward(self, x):
+        if len(x.shape) == 2:
+            x = self.linear(x.unsqueeze(dim=-1)).squeeze(dim=-1)
+        else:
+            x = self.linear(x)
+        x = self.nonlinear(x)
+        return x
+
+
+"""Note: The stride used here is different from that in Resnet
+"""
+
+
+class BasicResBlock(nn.Module):
+    expansion = 1
+
+    def __init__(self, in_planes, planes, stride=1):
+        super(BasicResBlock, self).__init__()
+        self.conv1 = nn.Conv2d(
+            in_planes, planes, kernel_size=3, stride=(stride, 1), padding=1, bias=False
+        )
+        self.bn1 = nn.BatchNorm2d(planes)
+        self.conv2 = nn.Conv2d(
+            planes, planes, kernel_size=3, stride=1, padding=1, bias=False
+        )
+        self.bn2 = nn.BatchNorm2d(planes)
+
+        self.shortcut = nn.Sequential()
+        if stride != 1 or in_planes != self.expansion * planes:
+            self.shortcut = nn.Sequential(
+                nn.Conv2d(
+                    in_planes,
+                    self.expansion * planes,
+                    kernel_size=1,
+                    stride=(stride, 1),
+                    bias=False,
+                ),
+                nn.BatchNorm2d(self.expansion * planes),
+            )
+
+    def forward(self, x):
+        out = F.relu(self.bn1(self.conv1(x)))
+        out = self.bn2(self.conv2(out))
+        out += self.shortcut(x)
+        out = F.relu(out)
+        return out
+
+
+class FCM(nn.Module):
+    def __init__(self, block, num_blocks, m_channels=32, feat_dim=80):
+        super(FCM, self).__init__()
+        self.in_planes = m_channels
+        self.conv1 = nn.Conv2d(
+            1, m_channels, kernel_size=3, stride=1, padding=1, bias=False
+        )
+        self.bn1 = nn.BatchNorm2d(m_channels)
+
+        self.layer1 = self._make_layer(block, m_channels, num_blocks[0], stride=2)
+        self.layer2 = self._make_layer(block, m_channels, num_blocks[0], stride=2)
+
+        self.conv2 = nn.Conv2d(
+            m_channels, m_channels, kernel_size=3, stride=(2, 1), padding=1, bias=False
+        )
+        self.bn2 = nn.BatchNorm2d(m_channels)
+        self.out_channels = m_channels * (feat_dim // 8)
+
+    def _make_layer(self, block, planes, num_blocks, stride):
+        strides = [stride] + [1] * (num_blocks - 1)
+        layers = []
+        for stride in strides:
+            layers.append(block(self.in_planes, planes, stride))
+            self.in_planes = planes * block.expansion
+        return nn.Sequential(*layers)
+
+    def forward(self, x):
+        x = x.unsqueeze(1)
+        out = F.relu(self.bn1(self.conv1(x)))
+        out = self.layer1(out)
+        out = self.layer2(out)
+        out = F.relu(self.bn2(self.conv2(out)))
+
+        shape = out.shape
+        out = out.reshape(shape[0], shape[1] * shape[2], shape[3])
+        return out
+
+
+class CAMPPlus(nn.Module):
+    def __init__(
+        self,
+        feat_dim=80,
+        embed_dim=512,
+        pooling_func="TSTP",
+        growth_rate=32,
+        bn_size=4,
+        init_channels=128,
+        config_str="batchnorm-relu",
+    ):
+        super(CAMPPlus, self).__init__()
+
+        self.feature_extractor = FbankFeatureExtractor(feat_dim=80)
+        self.head = FCM(block=BasicResBlock, num_blocks=[2, 2], feat_dim=feat_dim)
+        channels = self.head.out_channels
+
+        self.xvector = nn.Sequential(
+            OrderedDict(
+                [
+                    (
+                        "tdnn",
+                        TDNNLayer(
+                            channels,
+                            init_channels,
+                            5,
+                            stride=2,
+                            dilation=1,
+                            padding=-1,
+                            config_str=config_str,
+                        ),
+                    ),
+                ]
+            )
+        )
+        channels = init_channels
+        for i, (num_layers, kernel_size, dilation) in enumerate(
+            zip((12, 24, 16), (3, 3, 3), (1, 2, 2))
+        ):
+            block = CAMDenseTDNNBlock(
+                num_layers=num_layers,
+                in_channels=channels,
+                out_channels=growth_rate,
+                bn_channels=bn_size * growth_rate,
+                kernel_size=kernel_size,
+                dilation=dilation,
+                config_str=config_str,
+            )
+            self.xvector.add_module("block%d" % (i + 1), block)
+            channels = channels + num_layers * growth_rate
+            self.xvector.add_module(
+                "transit%d" % (i + 1),
+                TransitLayer(
+                    channels, channels // 2, bias=False, config_str=config_str
+                ),
+            )
+            channels //= 2
+
+        self.xvector.add_module("out_nonlinear", get_nonlinear(config_str, channels))
+
+        self.pool = getattr(pooling_layers, pooling_func)(in_dim=channels)
+        self.pool_out_dim = self.pool.get_out_dim()
+        self.xvector.add_module("stats", self.pool)
+        self.xvector.add_module(
+            "dense", DenseLayer(self.pool_out_dim, embed_dim, config_str="batchnorm_")
+        )
+
+        for m in self.modules():
+            if isinstance(m, (nn.Conv1d, nn.Linear)):
+                nn.init.kaiming_normal_(m.weight.data)
+                if m.bias is not None:
+                    nn.init.zeros_(m.bias)
+
+    def forward(self, x):
+        x = self.feature_extractor(x)
+        # x = x.permute(0, 2, 1)  # (B,T,F) => (B,F,T)
+        x = self.head(x)
+        x = self.xvector(x)
+
+        return x

src/flow.py

@@ -0,0 +1,47 @@
+import torch.nn as nn
+import module as modules
+
+
+class ResidualCouplingBlock(nn.Module):
+    def __init__(
+        self,
+        channels,
+        hidden_channels,
+        kernel_size,
+        dilation_rate,
+        n_layers,
+        n_flows=4,
+        gin_channels=0,
+    ):
+        super().__init__()
+        self.channels = channels
+        self.hidden_channels = hidden_channels
+        self.kernel_size = kernel_size
+        self.dilation_rate = dilation_rate
+        self.n_layers = n_layers
+        self.n_flows = n_flows
+        self.gin_channels = gin_channels
+
+        self.flows = nn.ModuleList()
+        for i in range(n_flows):
+            self.flows.append(
+                modules.ResidualCouplingLayer(
+                    channels,
+                    hidden_channels,
+                    kernel_size,
+                    dilation_rate,
+                    n_layers,
+                    gin_channels=gin_channels,
+                    mean_only=True,
+                )
+            )
+            self.flows.append(modules.Flip())
+
+    def forward(self, x, x_mask, g=None, reverse=False):
+        if not reverse:
+            for flow in self.flows:
+                x, _ = flow(x, x_mask, g=g, reverse=reverse)
+        else:
+            for flow in reversed(self.flows):
+                x = flow(x, x_mask, g=g, reverse=reverse)
+        return x

src/hifi_gan.py

@@ -0,0 +1,86 @@
+import torch
+import torch.nn as nn
+from torch.nn import Conv1d, ConvTranspose1d
+from torch.nn import functional as F
+from torch.nn.utils import remove_weight_norm, weight_norm
+
+import module as modules
+from module.resblocks import ResBlock1, ResBlock2
+from tools.commons import init_weights
+
+
+class Generator(torch.nn.Module):
+    def __init__(
+        self,
+        initial_channel,
+        resblock,
+        resblock_kernel_sizes,
+        resblock_dilation_sizes,
+        upsample_rates,
+        upsample_initial_channel,
+        upsample_kernel_sizes,
+        gin_channels,
+        activation="snakebeta",
+        snake_logscale=True,
+    ):
+        super(Generator, self).__init__()
+        self.num_kernels = len(resblock_kernel_sizes)
+        self.num_upsamples = len(upsample_rates)
+        self.conv_pre = Conv1d(initial_channel, upsample_initial_channel, 7, 1, 3)
+        resblock = ResBlock1 if resblock == "1" else ResBlock2
+
+        self.ups = nn.ModuleList()
+        for i, (u, k) in enumerate(zip(upsample_rates, upsample_kernel_sizes)):
+            self.ups.append(
+                weight_norm(
+                    ConvTranspose1d(
+                        in_channels=upsample_initial_channel // (2**i),
+                        out_channels=upsample_initial_channel // (2 ** (i + 1)),
+                        kernel_size=k,
+                        stride=u,
+                        padding=(k - u) // 2,
+                    )
+                )
+            )
+
+        self.resblocks = nn.ModuleList()
+        for i in range(len(self.ups)):
+            ch = upsample_initial_channel // (2 ** (i + 1))
+            for j, (k, d) in enumerate(
+                zip(resblock_kernel_sizes, resblock_dilation_sizes)
+            ):
+                self.resblocks.append(resblock(ch, k, d))
+
+        self.conv_post = Conv1d(ch, 1, 7, 1, padding=3, bias=False)
+        self.ups.apply(init_weights)
+
+        if gin_channels != 0:
+            self.cond = nn.Conv1d(gin_channels, upsample_initial_channel, 1)
+
+    def forward(self, x, g=None):
+        x = self.conv_pre(x)
+        if g is not None:
+            x = x + self.cond(g)
+
+        for i in range(self.num_upsamples):
+            x = F.leaky_relu(x, modules.LRELU_SLOPE)
+            x = self.ups[i](x)
+            xs = None
+            for j in range(self.num_kernels):
+                if xs is None:
+                    xs = self.resblocks[i * self.num_kernels + j](x)
+                else:
+                    xs += self.resblocks[i * self.num_kernels + j](x)
+            x = xs / self.num_kernels
+        x = F.leaky_relu(x)
+        x = self.conv_post(x)
+        x = torch.tanh(x)
+
+        return x
+
+    def remove_weight_norm(self):
+        print("Removing weight norm...")
+        for l in self.ups:
+            remove_weight_norm(l)
+        for l in self.resblocks:
+            l.remove_weight_norm()

src/hubert_posterior.py

@@ -0,0 +1,59 @@
+import torch
+import torch.nn as nn
+
+from .inference_hubert import InferenceHubertBase
+from .vae_memory_bank import VAEMemoryBank
+
+
+def create_padding_mask(waveforms_lengths: torch.Tensor = None):
+    if waveforms_lengths is None:
+        return None
+    batch = waveforms_lengths.shape[0]
+    max_len = waveforms_lengths.max()
+    device = waveforms_lengths.device
+    padding_mask = torch.ones(batch, max_len, dtype=torch.bool, device=device)
+    for idx, length in enumerate(waveforms_lengths):
+        padding_mask[idx, :length] = 0
+    return padding_mask
+
+
+def unfreeze_layers(model: nn.Module, root_name: str):
+    for name, param in model.named_parameters():
+        if root_name in name[: len(root_name)]:
+            param.requires_grad = True
+
+
+class PosteriorHubert(nn.Module):
+    def __init__(
+        self, out_channels, feature_channels, downsample_channels, output_layer=11
+    ) -> None:
+        super().__init__()
+        self.out_channels = out_channels
+        self.feature_channels = feature_channels
+        self.downsample_channels = downsample_channels
+        self.output_layer = output_layer
+
+        self.hubert = InferenceHubertBase()
+        self.memory_bank = VAEMemoryBank(
+            n_hidden_dims=feature_channels,
+            bank_size=1000,
+            output_channels=downsample_channels,
+        )
+
+        self.proj = nn.Conv1d(downsample_channels, out_channels * 2, 1)
+
+    def forward(self, waveforms: torch.Tensor, waveforms_lengths: torch.Tensor, g=None):
+        features, features_mask = self.hubert.extract_features(
+            source=waveforms,
+            padding_mask=create_padding_mask(waveforms_lengths),
+            output_layer=self.output_layer,
+        )
+        x = self.memory_bank(features.transpose(1, 2))
+        x_mask = (~features_mask).unsqueeze(1).to(torch.float32)
+        x = x[:, :, : x_mask.shape[-1]]
+
+        stats = self.proj(x) * x_mask
+        m, logs = torch.split(stats, self.out_channels, dim=1)
+
+        z = (m + torch.randn_like(m) * torch.exp(logs)) * x_mask
+        return z, m, logs, x_mask

src/inference_hubert/__init__.py

@@ -0,0 +1 @@
+from .hubert import InferenceHubertBase

src/inference_hubert/fairseq_modules.py

@@ -0,0 +1,52 @@
+"""
+Classes reused from:
+1. https://github.com/facebookresearch/fairseq/blob/main/fairseq/modules/fp32_group_norm.py
+2. https://github.com/facebookresearch/fairseq/blob/main/fairseq/modules/same_pad.py
+3. https://github.com/facebookresearch/fairseq/blob/main/fairseq/modules/fairseq_dropout.py
+"""
+
+import torch.nn as nn
+import torch.nn.functional as F
+
+
+class Fp32GroupNorm(nn.GroupNorm):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+    def forward(self, input):
+        output = F.group_norm(
+            input.float(),
+            self.num_groups,
+            self.weight.float() if self.weight is not None else None,
+            self.bias.float() if self.bias is not None else None,
+            self.eps,
+        )
+        return output.type_as(input)
+
+
+class SamePad(nn.Module):
+    def __init__(self, kernel_size, causal=False):
+        super().__init__()
+        if causal:
+            self.remove = kernel_size - 1
+        else:
+            self.remove = 1 if kernel_size % 2 == 0 else 0
+
+    def forward(self, x):
+        if self.remove > 0:
+            x = x[:, :, : -self.remove]
+        return x
+
+
+class FairseqDropout(nn.Module):
+    def __init__(self, p, module_name=None):
+        super().__init__()
+        self.p = p
+        self.module_name = module_name
+        self.apply_during_inference = False
+
+    def forward(self, x, inplace: bool = False):
+        if self.p > 0 and (self.training or self.apply_during_inference):
+            return F.dropout(x, p=self.p, training=True, inplace=inplace)
+        else:
+            return x

src/inference_hubert/hubert.py

@@ -0,0 +1,281 @@
+"""
+The `InferenceHubertBase` class is a lightweight version of the model from this repository:
+https://github.com/facebookresearch/fairseq/blob/main/fairseq/models/hubert/hubert.py#L248C5-L248C6
+"""
+
+import math
+from typing import Optional, Tuple
+
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from torch import Tensor
+
+from .fairseq_modules import Fp32GroupNorm, SamePad, FairseqDropout
+
+
+class InferenceHubertBase(nn.Module):
+    def __init__(self, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs)
+        self.feature_extractor = ConvFeatureExtractor()
+        self.layer_norm = nn.LayerNorm((512,), eps=1e-05, elementwise_affine=True)
+        self.post_extract_proj = nn.Linear(in_features=512, out_features=768, bias=True)
+        self.dropout_input = nn.Dropout(p=0.1, inplace=False)
+        self.dropout_features = nn.Dropout(p=0.1, inplace=False)
+        self.encoder = TransformerEncoder()
+
+    def extract_features(
+        self,
+        source: Tensor,
+        padding_mask: Optional[Tensor] = None,
+        output_layer: int = 12,
+    ) -> Tuple[Tensor, Tensor]:
+        features = self.feature_extractor(source).transpose(1, 2)
+        features = self.layer_norm(features)
+        if padding_mask is not None:
+            padding_mask = self.__apply_padding_mask(features, padding_mask)
+        features = self.post_extract_proj(features)
+        features = self.dropout_input(features)
+        features = self.encoder(
+            features, padding_mask=padding_mask, tgt_layer=output_layer - 1
+        )
+        return features, padding_mask
+
+    def __apply_padding_mask(self, features: Tensor, padding_mask: Tensor) -> Tensor:
+        extra = padding_mask.size(1) % features.size(1)
+        if extra > 0:
+            padding_mask = padding_mask[:, :-extra]
+        padding_mask = padding_mask.view(padding_mask.size(0), features.size(1), -1)
+        padding_mask = padding_mask.all(-1)
+        return padding_mask
+
+
+class ConvFeatureExtractor(nn.Module):
+    def __init__(self, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs)
+        conv_layers = [
+            nn.Sequential(
+                nn.Conv1d(1, 512, kernel_size=(10,), stride=(5,), bias=False),
+                nn.Dropout(p=0.0, inplace=False),
+                Fp32GroupNorm(512, 512, eps=1e-05, affine=True),
+                nn.GELU(approximate="none"),
+            ),
+            *[
+                nn.Sequential(
+                    nn.Conv1d(512, 512, kernel_size=(3,), stride=(2,), bias=False),
+                    nn.Dropout(p=0.0, inplace=False),
+                    nn.GELU(approximate="none"),
+                )
+                for _ in range(4)
+            ],
+            *[
+                nn.Sequential(
+                    nn.Conv1d(512, 512, kernel_size=(2,), stride=(2,), bias=False),
+                    nn.Dropout(p=0.0, inplace=False),
+                    nn.GELU(approximate="none"),
+                )
+                for _ in range(2)
+            ],
+        ]
+        self.conv_layers = nn.ModuleList(conv_layers)
+
+    def forward(self, x: Tensor):
+        x = x.unsqueeze(1)
+        for conv in self.conv_layers:
+            x = conv(x)
+        return x
+
+
+class TransformerEncoder(nn.Module):
+    def __init__(
+        self, dropout=0.1, required_seq_len_multiple=2, *args, **kwargs
+    ) -> None:
+        super().__init__(*args, **kwargs)
+        self.dropout = dropout  # 0.1
+        self.required_seq_len_multiple = required_seq_len_multiple  # 2
+
+        pos_conv = nn.Conv1d(
+            768, 768, kernel_size=(128,), stride=(1,), padding=(64,), groups=16
+        )
+        self.pos_conv = nn.Sequential(
+            nn.utils.weight_norm(pos_conv, name="weight", dim=2),
+            SamePad(128),
+            nn.GELU(approximate="none"),
+        )
+        self.layers = nn.ModuleList(
+            [TransformerSentenceEncoderLayer() for _ in range(12)]
+        )
+        self.layer_norm = nn.LayerNorm((768,), eps=1e-05, elementwise_affine=True)
+
+    @torch.no_grad()
+    def forward(self, x: Tensor, padding_mask=None, tgt_layer=None):
+        if padding_mask is not None:
+            # x = index_put(x, padding_mask, 0)
+            x[padding_mask] = 0
+
+        x_conv = self.pos_conv(x.transpose(1, 2))
+        x_conv = x_conv.transpose(1, 2)
+        x = x + x_conv
+
+        x = self.layer_norm(x)
+
+        # pad to the sequence length dimension
+        x, pad_length = pad_to_multiple(
+            x, self.required_seq_len_multiple, dim=-2, value=0
+        )
+        if pad_length > 0 and padding_mask is None:
+            padding_mask = x.new_zeros((x.size(0), x.size(1)), dtype=torch.bool)
+            padding_mask[:, -pad_length:] = True
+        else:
+            padding_mask, _ = pad_to_multiple(
+                padding_mask, self.required_seq_len_multiple, dim=-1, value=True
+            )
+        x = F.dropout(x, p=self.dropout, training=self.training)
+
+        # B x T x C -> T x B x C
+        x = x.transpose(0, 1)
+
+        for i, layer in enumerate(self.layers):
+            x, _ = layer(x, self_attn_padding_mask=padding_mask, need_weights=False)
+            if i == tgt_layer:
+                break
+
+        # T x B x C -> B x T x C
+        x = x.transpose(0, 1)
+        return x
+
+
+class TransformerSentenceEncoderLayer(nn.Module):
+    def __init__(
+        self,
+        embedding_dim: float = 768,
+        ffn_embedding_dim: float = 3072,
+        num_attention_heads: int = 12,
+        dropout: float = 0.1,
+        attention_dropout: float = 0.1,
+        activation_dropout: float = 0.1,
+        layer_norm_first: bool = False,
+        *args,
+        **kwargs,
+    ) -> None:
+        super().__init__(*args, **kwargs)
+        self.embedding_dim = embedding_dim
+        self.ffn_embedding_dim = ffn_embedding_dim
+        self.num_attention_heads = num_attention_heads
+
+        self.self_attn = MultiheadAttention(
+            self.embedding_dim,  # 768
+            num_attention_heads,  # 12
+            dropout=attention_dropout,  # 0.1
+        )
+        self.dropout1 = nn.Dropout(dropout)
+        self.dropout2 = nn.Dropout(activation_dropout)
+        self.dropout3 = nn.Dropout(dropout)
+        self.layer_norm_first = layer_norm_first
+        self.self_attn_layer_norm = nn.LayerNorm(self.embedding_dim)
+        self.fc1 = nn.Linear(self.embedding_dim, ffn_embedding_dim)
+        self.fc2 = nn.Linear(ffn_embedding_dim, self.embedding_dim)
+        self.final_layer_norm = nn.LayerNorm(self.embedding_dim)
+
+    def forward(
+        self,
+        x: torch.Tensor,
+        self_attn_mask: torch.Tensor = None,
+        self_attn_padding_mask: torch.Tensor = None,
+        need_weights: bool = False,
+        att_args=None,
+    ):
+        residual = x
+        x, attn = self.self_attn(
+            query=x,
+            key=x,
+            value=x,
+            key_padding_mask=self_attn_padding_mask,
+            need_weights=False,
+        )
+
+        x = self.dropout1(x)
+        x = residual + x
+
+        x = self.self_attn_layer_norm(x)
+
+        residual = x
+        x = F.gelu(self.fc1(x).float()).type_as(x)
+        x = self.dropout2(x)
+        x = self.fc2(x)
+
+        layer_result = x
+
+        x = self.dropout3(x)
+        x = residual + x
+        x = self.final_layer_norm(x)
+
+        return x, (attn, layer_result)
+
+
+class MultiheadAttention(nn.Module):
+    def __init__(
+        self, embed_dim: int, num_heads: int, dropout=0.1, bias=True, *args, **kwargs
+    ) -> None:
+        super().__init__(*args, **kwargs)
+        self.embed_dim = embed_dim
+        self.num_heads = num_heads
+
+        self.dropout_module = FairseqDropout(p=dropout)
+        self.k_proj = nn.Linear(embed_dim, embed_dim, bias=bias)
+        self.v_proj = nn.Linear(embed_dim, embed_dim, bias=bias)
+        self.q_proj = nn.Linear(embed_dim, embed_dim, bias=bias)
+        self.out_proj = nn.Linear(embed_dim, embed_dim, bias=bias)
+
+    def forward(
+        self,
+        query: Tensor,
+        key: Tensor,
+        value: Tensor,
+        key_padding_mask: Optional[Tensor] = None,
+        need_weights: bool = False,
+        attn_mask: Optional[Tensor] = None,
+    ) -> Tuple[Tensor, Optional[Tensor]]:
+
+        tgt_len, bsz, embed_dim = query.size()
+        src_len = tgt_len
+        assert embed_dim == self.embed_dim, f"query dim {embed_dim} != {self.embed_dim}"
+        src_len, key_bsz, _ = key.size()
+        assert src_len, key_bsz == value.shape[:2]
+        return F.multi_head_attention_forward(
+            query,
+            key,
+            value,
+            self.embed_dim,
+            self.num_heads,
+            torch.empty([0]),
+            torch.cat((self.q_proj.bias, self.k_proj.bias, self.v_proj.bias)),
+            None,
+            None,
+            False,
+            self.dropout_module.p,
+            self.out_proj.weight,
+            self.out_proj.bias,
+            self.training or self.dropout_module.apply_during_inference,
+            key_padding_mask.bool() if key_padding_mask is not None else None,
+            need_weights,
+            attn_mask,
+            use_separate_proj_weight=True,
+            q_proj_weight=self.q_proj.weight,
+            k_proj_weight=self.k_proj.weight,
+            v_proj_weight=self.v_proj.weight,
+        )
+
+
+def pad_to_multiple(x, multiple, dim=-1, value=0):
+    # Inspired from https://github.com/lucidrains/local-attention/blob/master/local_attention/local_attention.py#L41
+    if x is None:
+        return None, 0
+    tsz = x.size(dim)
+    m = tsz / multiple
+    remainder = math.ceil(m) * multiple - tsz
+    if m.is_integer():
+        return x, 0
+    pad_offset = (0,) * (-1 - dim) * 2
+
+    return F.pad(x, (*pad_offset, 0, remainder), value=value), remainder

src/vae_memory_bank.py

@@ -0,0 +1,40 @@
+import torch
+import torch.nn as nn
+
+from .attentions import MultiHeadAttention
+
+
+class VAEMemoryBank(nn.Module):
+    def __init__(
+        self,
+        bank_size=1000,
+        n_hidden_dims=512,
+        n_attn_heads=2,
+        init_values=None,
+        output_channels=192,
+    ):
+        super().__init__()
+
+        self.bank_size = bank_size
+        self.n_hidden_dims = n_hidden_dims
+        self.n_attn_heads = n_attn_heads
+
+        self.encoder = MultiHeadAttention(
+            channels=n_hidden_dims,
+            out_channels=n_hidden_dims,
+            n_heads=n_attn_heads,
+        )
+
+        self.memory_bank = nn.Parameter(torch.randn(n_hidden_dims, bank_size))
+        self.proj = nn.Conv1d(n_hidden_dims, output_channels, 1)
+        if init_values is not None:
+            with torch.no_grad():
+                self.memory_bank.copy_(init_values)
+
+    def forward(self, z: torch.Tensor):
+        b, _, _ = z.shape
+        ret = self.encoder(
+            z, self.memory_bank.unsqueeze(0).repeat(b, 1, 1), attn_mask=None
+        )
+        ret = self.proj(ret)
+        return ret

src/wespeaker_campplus/__init__.py

@@ -0,0 +1,4 @@
+"""
+The methods in this module are reused from this repository
+https://github.com/wenet-e2e/wespeaker
+"""

src/wespeaker_campplus/fbank_feature_extractor.py

@@ -0,0 +1,38 @@
+import torch.nn as nn
+import torch
+import torch.nn.functional as F
+import torchaudio
+
+class PreEmphasis(torch.nn.Module):
+
+    def __init__(self, coef: float = 0.97):
+        super().__init__()
+        self.coef = coef
+        self.register_buffer(
+            'flipped_filter', torch.FloatTensor([-self.coef, 1.]).unsqueeze(0).unsqueeze(0)
+        )
+
+    def forward(self, input: torch.tensor) -> torch.tensor:
+        input = input.unsqueeze(1)
+        input = F.pad(input, (1, 0), 'reflect')
+        return F.conv1d(input, self.flipped_filter).squeeze(1)
+
+class FbankFeatureExtractor(nn.Module):
+    """Some Information about MyModule"""
+    def __init__(self,  feat_dim = 80, f_max = 7600, **kwargs):
+        super(FbankFeatureExtractor, self, ).__init__()
+
+        self.torchfbank = torch.nn.Sequential(
+            PreEmphasis(),            
+            torchaudio.transforms.MelSpectrogram(sample_rate=16000, n_fft=512, win_length=400, hop_length=160, \
+                                                 f_min = 20, f_max = f_max, window_fn=torch.hamming_window, n_mels=feat_dim),
+            )
+
+        self.instance_norm = nn.InstanceNorm1d(feat_dim)
+
+    def forward(self, x):
+        with torch.no_grad():
+            x = self.torchfbank(x)+1e-6
+            x = x.log()   
+            x = x - torch.mean(x, dim=-1, keepdim=True)
+        return x

src/wespeaker_campplus/pooling_layers.py

@@ -0,0 +1,287 @@
+# Copyright (c) 2021 Shuai Wang (wsstriving@gmail.com)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Pooling functions to aggregate frame-level deep features
+into segment-level speaker embeddings
+
+High-order statistics are surprisingly effective, TSDP acts similarly as TSTP,
+even though we remove the mean statistic, on Voxceleb.
+"""
+
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+
+class TAP(nn.Module):
+    """
+    Temporal average pooling, only first-order mean is considered
+    """
+
+    def __init__(self, in_dim=0, **kwargs):
+        super(TAP, self).__init__()
+        self.in_dim = in_dim
+
+    def forward(self, x):
+        pooling_mean = x.mean(dim=-1)
+        # To be compatable with 2D input
+        pooling_mean = pooling_mean.flatten(start_dim=1)
+        return pooling_mean
+
+    def get_out_dim(self):
+        self.out_dim = self.in_dim
+        return self.out_dim
+
+
+class TSDP(nn.Module):
+    """
+    Temporal standard deviation pooling, only second-order std is considered
+    """
+
+    def __init__(self, in_dim=0, **kwargs):
+        super(TSDP, self).__init__()
+        self.in_dim = in_dim
+
+    def forward(self, x):
+        # The last dimension is the temporal axis
+        pooling_std = torch.sqrt(torch.var(x, dim=-1) + 1e-7)
+        pooling_std = pooling_std.flatten(start_dim=1)
+        return pooling_std
+
+    def get_out_dim(self):
+        self.out_dim = self.in_dim
+        return self.out_dim
+
+
+class TSTP(nn.Module):
+    """
+    Temporal statistics pooling, concatenate mean and std, which is used in
+    x-vector
+    Comment: simple concatenation can not make full use of both statistics
+    """
+
+    def __init__(self, in_dim=0, **kwargs):
+        super(TSTP, self).__init__()
+        self.in_dim = in_dim
+
+    def forward(self, x):
+        # The last dimension is the temporal axis
+        pooling_mean = x.mean(dim=-1)
+        pooling_std = torch.sqrt(torch.var(x, dim=-1) + 1e-7)
+        pooling_mean = pooling_mean.flatten(start_dim=1)
+        pooling_std = pooling_std.flatten(start_dim=1)
+        stats = torch.cat((pooling_mean, pooling_std), 1)
+        return stats
+
+    def get_out_dim(self):
+        self.out_dim = self.in_dim * 2
+        return self.out_dim
+
+
+class ASTP(nn.Module):
+    """Attentive statistics pooling: Channel- and context-dependent
+    statistics pooling, first used in ECAPA_TDNN.
+    """
+
+    def __init__(self, in_dim, bottleneck_dim=128, global_context_att=False, **kwargs):
+        super(ASTP, self).__init__()
+        self.in_dim = in_dim
+        self.global_context_att = global_context_att
+
+        # Use Conv1d with stride == 1 rather than Linear, then we don't
+        # need to transpose inputs.
+        if global_context_att:
+            self.linear1 = nn.Conv1d(
+                in_dim * 3, bottleneck_dim, kernel_size=1
+            )  # equals W and b in the paper
+        else:
+            self.linear1 = nn.Conv1d(
+                in_dim, bottleneck_dim, kernel_size=1
+            )  # equals W and b in the paper
+        self.linear2 = nn.Conv1d(
+            bottleneck_dim, in_dim, kernel_size=1
+        )  # equals V and k in the paper
+
+    def forward(self, x):
+        """
+        x: a 3-dimensional tensor in tdnn-based architecture (B,F,T)
+            or a 4-dimensional tensor in resnet architecture (B,C,F,T)
+            0-dim: batch-dimension, last-dim: time-dimension (frame-dimension)
+        """
+        if len(x.shape) == 4:
+            x = x.reshape(x.shape[0], x.shape[1] * x.shape[2], x.shape[3])
+        assert len(x.shape) == 3
+
+        if self.global_context_att:
+            context_mean = torch.mean(x, dim=-1, keepdim=True).expand_as(x)
+            context_std = torch.sqrt(
+                torch.var(x, dim=-1, keepdim=True) + 1e-7
+            ).expand_as(x)
+            x_in = torch.cat((x, context_mean, context_std), dim=1)
+        else:
+            x_in = x
+
+        # DON'T use ReLU here! ReLU may be hard to converge.
+        alpha = torch.tanh(self.linear1(x_in))  # alpha = F.relu(self.linear1(x_in))
+        alpha = torch.softmax(self.linear2(alpha), dim=2)
+        mean = torch.sum(alpha * x, dim=2)
+        var = torch.sum(alpha * (x**2), dim=2) - mean**2
+        std = torch.sqrt(var.clamp(min=1e-7))
+        return torch.cat([mean, std], dim=1)
+
+    def get_out_dim(self):
+        self.out_dim = 2 * self.in_dim
+        return self.out_dim
+
+
+class MHASTP(torch.nn.Module):
+    """Multi head attentive statistics pooling
+    Reference:
+        Self Multi-Head Attention for Speaker Recognition
+        https://arxiv.org/pdf/1906.09890.pdf
+    """
+
+    def __init__(
+        self, in_dim, layer_num=2, head_num=2, d_s=1, bottleneck_dim=64, **kwargs
+    ):
+        super(MHASTP, self).__init__()
+        assert (
+            in_dim % head_num
+        ) == 0  # make sure that head num can be divided by input_dim
+        self.in_dim = in_dim
+        self.head_num = head_num
+        d_model = int(in_dim / head_num)
+        channel_dims = [bottleneck_dim for i in range(layer_num + 1)]
+        if d_s > 1:
+            d_s = d_model
+        else:
+            d_s = 1
+        self.d_s = d_s
+        channel_dims[0], channel_dims[-1] = d_model, d_s
+        heads_att_trans = []
+        for i in range(self.head_num):
+            att_trans = nn.Sequential()
+            for i in range(layer_num - 1):
+                att_trans.add_module(
+                    "att_" + str(i),
+                    nn.Conv1d(channel_dims[i], channel_dims[i + 1], 1, 1),
+                )
+                att_trans.add_module("tanh" + str(i), nn.Tanh())
+            att_trans.add_module(
+                "att_" + str(layer_num - 1),
+                nn.Conv1d(channel_dims[layer_num - 1], channel_dims[layer_num], 1, 1),
+            )
+            heads_att_trans.append(att_trans)
+        self.heads_att_trans = nn.ModuleList(heads_att_trans)
+
+    def forward(self, input):
+        """
+        input: a 3-dimensional tensor in xvector architecture
+            or a 4-dimensional tensor in resnet architecture
+            0-dim: batch-dimension, last-dim: time-dimension (frame-dimension)
+        """
+        if len(input.shape) == 4:  # B x F x T
+            input = input.reshape(
+                input.shape[0], input.shape[1] * input.shape[2], input.shape[3]
+            )
+        assert len(input.shape) == 3
+        bs, f_dim, t_dim = input.shape
+        chunks = torch.chunk(input, self.head_num, 1)
+        # split
+        chunks_out = []
+        # for i in range(self.head_num):
+        #     att_score = self.heads_att_trans[i](chunks[i])
+        for i, layer in enumerate(self.heads_att_trans):
+            att_score = layer(chunks[i])
+            alpha = F.softmax(att_score, dim=-1)
+            mean = torch.sum(alpha * chunks[i], dim=2)
+            var = torch.sum(alpha * chunks[i] ** 2, dim=2) - mean**2
+            std = torch.sqrt(var.clamp(min=1e-7))
+            chunks_out.append(torch.cat((mean, std), dim=1))
+        out = torch.cat(chunks_out, dim=1)
+        return out
+
+    def get_out_dim(self):
+        self.out_dim = 2 * self.in_dim
+        return self.out_dim
+
+
+class MQMHASTP(torch.nn.Module):
+    """An attentive pooling
+    Reference:
+        multi query multi head attentive statistics pooling
+        https://arxiv.org/pdf/2110.05042.pdf
+    Args:
+        in_dim: the feature dimension of input
+        layer_num: the number of layer in the pooling layer
+        query_num: the number of querys
+        head_num: the number of heads
+        bottleneck_dim: the bottleneck dimension
+
+    SA (H = 1, Q = 1, n = 2, d_s = 1) ref:
+        https://www.danielpovey.com/files/2018_interspeech_xvector_attention.pdf
+    MHA (H > 1, Q = 1, n = 1, d_s = 1) ref:
+        https://arxiv.org/pdf/1906.09890.pdf
+    AS (H = 1, Q > 1, n = 2, d_s = 1) ref:
+        https://arxiv.org/pdf/1803.10963.pdf
+    VSA (H = 1, Q > 1, n = 2, d_s = d_h) ref:
+        http://www.interspeech2020.org/uploadfile/pdf/Mon-2-10-5.pdf
+    """
+
+    def __init__(
+        self,
+        in_dim,
+        layer_num=2,
+        query_num=2,
+        head_num=8,
+        d_s=2,
+        bottleneck_dim=64,
+        **kwargs
+    ):
+        super(MQMHASTP, self).__init__()
+        self.n_query = nn.ModuleList(
+            [
+                MHASTP(
+                    in_dim,
+                    layer_num=layer_num,
+                    head_num=head_num,
+                    d_s=d_s,
+                    bottleneck_dim=bottleneck_dim,
+                )
+                for i in range(query_num)
+            ]
+        )
+        self.query_num = query_num
+        self.in_dim = in_dim
+
+    def forward(self, input):
+        """
+        input: a 3-dimensional tensor in xvector architecture
+            or a 4-dimensional tensor in resnet architecture
+            0-dim: batch-dimension, last-dim: time-dimension (frame-dimension)
+        """
+        if len(input.shape) == 4:  # B x F x T
+            input = input.reshape(
+                input.shape[0], input.shape[1] * input.shape[2], input.shape[3]
+            )
+        assert len(input.shape) == 3
+        res = []
+        for i, layer in enumerate(self.n_query):
+            res.append(layer(input))
+        out = torch.cat(res, dim=-1)
+        return out
+
+    def get_out_dim(self):
+        self.out_dim = self.in_dim * 2 * self.query_num
+        return self.out_dim

tools/commons.py

@@ -0,0 +1,181 @@
+import math
+
+import numpy as np
+import torch
+from torch import nn
+from torch.nn import functional as F
+
+
+def init_weights(m, mean=0.0, std=0.01):
+    classname = m.__class__.__name__
+    if classname.find("Conv") != -1:
+        try:
+            m.weight.data.normal_(mean, std)
+        except:
+            try:
+                m.conv.weight.data.normal_(mean, std)
+            except:
+                m.conv.conv.weight.data.normal_(mean, std)
+
+
+def get_padding(kernel_size, dilation=1):
+    return int((kernel_size * dilation - dilation) / 2)
+
+
+def convert_pad_shape(pad_shape):
+    l = pad_shape[::-1]
+    pad_shape = [item for sublist in l for item in sublist]
+    return pad_shape
+
+
+def intersperse(lst, item):
+    result = [item] * (len(lst) * 2 + 1)
+    result[1::2] = lst
+    return result
+
+
+def kl_divergence(m_p, logs_p, m_q, logs_q):
+    """KL(P||Q)"""
+    kl = (logs_q - logs_p) - 0.5
+    kl += (
+        0.5 * (torch.exp(2.0 * logs_p) + ((m_p - m_q) ** 2)) * torch.exp(-2.0 * logs_q)
+    )
+    return kl
+
+
+def rand_gumbel(shape):
+    """Sample from the Gumbel distribution, protect from overflows."""
+    uniform_samples = torch.rand(shape) * 0.99998 + 0.00001
+    return -torch.log(-torch.log(uniform_samples))
+
+
+def rand_gumbel_like(x):
+    g = rand_gumbel(x.size()).to(dtype=x.dtype, device=x.device)
+    return g
+
+
+def slice_segments(x, ids_str, segment_size=4):
+    ret = torch.zeros_like(x[:, :, :segment_size])
+    for i in range(x.size(0)):
+        idx_str = ids_str[i]
+        idx_end = idx_str + segment_size
+        ret[i] = x[i, :, idx_str:idx_end]
+    return ret
+
+
+def rand_slice_segments(x, x_lengths=None, segment_size=4):
+    b, d, t = x.size()
+    if x_lengths is None:
+        x_lengths = t
+    ids_str_max = x_lengths - segment_size + 1
+    ids_str = (torch.rand([b]).to(device=x.device) * ids_str_max).to(dtype=torch.long)
+    ret = slice_segments(x, ids_str, segment_size)
+    return ret, ids_str
+
+
+def get_timing_signal_1d(length, channels, min_timescale=1.0, max_timescale=1.0e4):
+    position = torch.arange(length, dtype=torch.float)
+    num_timescales = channels // 2
+    log_timescale_increment = math.log(float(max_timescale) / float(min_timescale)) / (
+        num_timescales - 1
+    )
+    inv_timescales = min_timescale * torch.exp(
+        torch.arange(num_timescales, dtype=torch.float) * -log_timescale_increment
+    )
+    scaled_time = position.unsqueeze(0) * inv_timescales.unsqueeze(1)
+    signal = torch.cat([torch.sin(scaled_time), torch.cos(scaled_time)], 0)
+    signal = F.pad(signal, [0, 0, 0, channels % 2])
+    signal = signal.view(1, channels, length)
+    return signal
+
+
+def add_timing_signal_1d(x, min_timescale=1.0, max_timescale=1.0e4):
+    b, channels, length = x.size()
+    signal = get_timing_signal_1d(length, channels, min_timescale, max_timescale)
+    return x + signal.to(dtype=x.dtype, device=x.device)
+
+
+def cat_timing_signal_1d(x, min_timescale=1.0, max_timescale=1.0e4, axis=1):
+    b, channels, length = x.size()
+    signal = get_timing_signal_1d(length, channels, min_timescale, max_timescale)
+    return torch.cat([x, signal.to(dtype=x.dtype, device=x.device)], axis)
+
+
+def subsequent_mask(length):
+    mask = torch.tril(torch.ones(length, length)).unsqueeze(0).unsqueeze(0)
+    return mask
+
+
+@torch.jit.script
+def fused_add_tanh_sigmoid_multiply(input_a, input_b, n_channels):
+    n_channels_int = n_channels[0]
+    in_act = input_a + input_b
+    t_act = torch.tanh(in_act[:, :n_channels_int, :])
+    s_act = torch.sigmoid(in_act[:, n_channels_int:, :])
+    acts = t_act * s_act
+    return acts
+
+
+def convert_pad_shape(pad_shape):
+    l = pad_shape[::-1]
+    pad_shape = [item for sublist in l for item in sublist]
+    return pad_shape
+
+
+def shift_1d(x):
+    x = F.pad(x, convert_pad_shape([[0, 0], [0, 0], [1, 0]]))[:, :, :-1]
+    return x
+
+
+def sequence_mask(length: torch.LongTensor, max_length: int = None):
+    """_summary_
+
+    Args:
+        length      (torch.LongTensor): 1d sequence of lengths of some sequence [BATCH_SIZE]
+        max_length  (int, optional)   : max length of sequence. Defaults to None.
+
+    Returns:
+        _type_: _description_
+    """
+    if max_length is None:
+        max_length = length.max()
+
+    x = torch.arange(max_length, dtype=length.dtype, device=length.device)
+
+    return x.unsqueeze(0) < length.unsqueeze(1)
+
+
+def generate_path(duration, mask):
+    """
+    duration: [b, 1, t_x]
+    mask: [b, 1, t_y, t_x]
+    """
+    device = duration.device
+
+    b, _, t_y, t_x = mask.shape
+    cum_duration = torch.cumsum(duration, -1)
+
+    cum_duration_flat = cum_duration.view(b * t_x)
+    path = sequence_mask(cum_duration_flat, t_y).to(mask.dtype)
+    path = path.view(b, t_x, t_y)
+    path = path - F.pad(path, convert_pad_shape([[0, 0], [1, 0], [0, 0]]))[:, :-1]
+    path = path.unsqueeze(1).transpose(2, 3).contiguous() * mask
+    return path
+
+
+def clip_grad_value_(parameters, clip_value, norm_type=2):
+    if isinstance(parameters, torch.Tensor):
+        parameters = [parameters]
+    parameters = list(filter(lambda p: p.grad is not None, parameters))
+    norm_type = float(norm_type)
+    if clip_value is not None:
+        clip_value = float(clip_value)
+
+    total_norm = 0
+    for p in parameters:
+        param_norm = p.grad.data.norm(norm_type)
+        total_norm += param_norm.item() ** norm_type
+        if clip_value is not None:
+            p.grad.data.clamp_(min=-clip_value, max=clip_value)
+    total_norm = total_norm ** (1.0 / norm_type)
+    return total_norm

tools/transforms.py

@@ -0,0 +1,209 @@
+import torch
+from torch.nn import functional as F
+
+import numpy as np
+
+
+DEFAULT_MIN_BIN_WIDTH = 1e-3
+DEFAULT_MIN_BIN_HEIGHT = 1e-3
+DEFAULT_MIN_DERIVATIVE = 1e-3
+
+
+def piecewise_rational_quadratic_transform(
+    inputs,
+    unnormalized_widths,
+    unnormalized_heights,
+    unnormalized_derivatives,
+    inverse=False,
+    tails=None,
+    tail_bound=1.0,
+    min_bin_width=DEFAULT_MIN_BIN_WIDTH,
+    min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
+    min_derivative=DEFAULT_MIN_DERIVATIVE,
+):
+    if tails is None:
+        spline_fn = rational_quadratic_spline
+        spline_kwargs = {}
+    else:
+        spline_fn = unconstrained_rational_quadratic_spline
+        spline_kwargs = {"tails": tails, "tail_bound": tail_bound}
+
+    outputs, logabsdet = spline_fn(
+        inputs=inputs,
+        unnormalized_widths=unnormalized_widths,
+        unnormalized_heights=unnormalized_heights,
+        unnormalized_derivatives=unnormalized_derivatives,
+        inverse=inverse,
+        min_bin_width=min_bin_width,
+        min_bin_height=min_bin_height,
+        min_derivative=min_derivative,
+        **spline_kwargs
+    )
+    return outputs, logabsdet
+
+
+def searchsorted(bin_locations, inputs, eps=1e-6):
+    bin_locations[..., -1] += eps
+    return torch.sum(inputs[..., None] >= bin_locations, dim=-1) - 1
+
+
+def unconstrained_rational_quadratic_spline(
+    inputs,
+    unnormalized_widths,
+    unnormalized_heights,
+    unnormalized_derivatives,
+    inverse=False,
+    tails="linear",
+    tail_bound=1.0,
+    min_bin_width=DEFAULT_MIN_BIN_WIDTH,
+    min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
+    min_derivative=DEFAULT_MIN_DERIVATIVE,
+):
+    inside_interval_mask = (inputs >= -tail_bound) & (inputs <= tail_bound)
+    outside_interval_mask = ~inside_interval_mask
+
+    outputs = torch.zeros_like(inputs)
+    logabsdet = torch.zeros_like(inputs)
+
+    if tails == "linear":
+        unnormalized_derivatives = F.pad(unnormalized_derivatives, pad=(1, 1))
+        constant = np.log(np.exp(1 - min_derivative) - 1)
+        unnormalized_derivatives[..., 0] = constant
+        unnormalized_derivatives[..., -1] = constant
+
+        outputs[outside_interval_mask] = inputs[outside_interval_mask]
+        logabsdet[outside_interval_mask] = 0
+    else:
+        raise RuntimeError("{} tails are not implemented.".format(tails))
+
+    (
+        outputs[inside_interval_mask],
+        logabsdet[inside_interval_mask],
+    ) = rational_quadratic_spline(
+        inputs=inputs[inside_interval_mask],
+        unnormalized_widths=unnormalized_widths[inside_interval_mask, :],
+        unnormalized_heights=unnormalized_heights[inside_interval_mask, :],
+        unnormalized_derivatives=unnormalized_derivatives[inside_interval_mask, :],
+        inverse=inverse,
+        left=-tail_bound,
+        right=tail_bound,
+        bottom=-tail_bound,
+        top=tail_bound,
+        min_bin_width=min_bin_width,
+        min_bin_height=min_bin_height,
+        min_derivative=min_derivative,
+    )
+
+    return outputs, logabsdet
+
+
+def rational_quadratic_spline(
+    inputs,
+    unnormalized_widths,
+    unnormalized_heights,
+    unnormalized_derivatives,
+    inverse=False,
+    left=0.0,
+    right=1.0,
+    bottom=0.0,
+    top=1.0,
+    min_bin_width=DEFAULT_MIN_BIN_WIDTH,
+    min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
+    min_derivative=DEFAULT_MIN_DERIVATIVE,
+):
+    if torch.min(inputs) < left or torch.max(inputs) > right:
+        raise ValueError("Input to a transform is not within its domain")
+
+    num_bins = unnormalized_widths.shape[-1]
+
+    if min_bin_width * num_bins > 1.0:
+        raise ValueError("Minimal bin width too large for the number of bins")
+    if min_bin_height * num_bins > 1.0:
+        raise ValueError("Minimal bin height too large for the number of bins")
+
+    widths = F.softmax(unnormalized_widths, dim=-1)
+    widths = min_bin_width + (1 - min_bin_width * num_bins) * widths
+    cumwidths = torch.cumsum(widths, dim=-1)
+    cumwidths = F.pad(cumwidths, pad=(1, 0), mode="constant", value=0.0)
+    cumwidths = (right - left) * cumwidths + left
+    cumwidths[..., 0] = left
+    cumwidths[..., -1] = right
+    widths = cumwidths[..., 1:] - cumwidths[..., :-1]
+
+    derivatives = min_derivative + F.softplus(unnormalized_derivatives)
+
+    heights = F.softmax(unnormalized_heights, dim=-1)
+    heights = min_bin_height + (1 - min_bin_height * num_bins) * heights
+    cumheights = torch.cumsum(heights, dim=-1)
+    cumheights = F.pad(cumheights, pad=(1, 0), mode="constant", value=0.0)
+    cumheights = (top - bottom) * cumheights + bottom
+    cumheights[..., 0] = bottom
+    cumheights[..., -1] = top
+    heights = cumheights[..., 1:] - cumheights[..., :-1]
+
+    if inverse:
+        bin_idx = searchsorted(cumheights, inputs)[..., None]
+    else:
+        bin_idx = searchsorted(cumwidths, inputs)[..., None]
+
+    input_cumwidths = cumwidths.gather(-1, bin_idx)[..., 0]
+    input_bin_widths = widths.gather(-1, bin_idx)[..., 0]
+
+    input_cumheights = cumheights.gather(-1, bin_idx)[..., 0]
+    delta = heights / widths
+    input_delta = delta.gather(-1, bin_idx)[..., 0]
+
+    input_derivatives = derivatives.gather(-1, bin_idx)[..., 0]
+    input_derivatives_plus_one = derivatives[..., 1:].gather(-1, bin_idx)[..., 0]
+
+    input_heights = heights.gather(-1, bin_idx)[..., 0]
+
+    if inverse:
+        a = (inputs - input_cumheights) * (
+            input_derivatives + input_derivatives_plus_one - 2 * input_delta
+        ) + input_heights * (input_delta - input_derivatives)
+        b = input_heights * input_derivatives - (inputs - input_cumheights) * (
+            input_derivatives + input_derivatives_plus_one - 2 * input_delta
+        )
+        c = -input_delta * (inputs - input_cumheights)
+
+        discriminant = b.pow(2) - 4 * a * c
+        assert (discriminant >= 0).all()
+
+        root = (2 * c) / (-b - torch.sqrt(discriminant))
+        outputs = root * input_bin_widths + input_cumwidths
+
+        theta_one_minus_theta = root * (1 - root)
+        denominator = input_delta + (
+            (input_derivatives + input_derivatives_plus_one - 2 * input_delta)
+            * theta_one_minus_theta
+        )
+        derivative_numerator = input_delta.pow(2) * (
+            input_derivatives_plus_one * root.pow(2)
+            + 2 * input_delta * theta_one_minus_theta
+            + input_derivatives * (1 - root).pow(2)
+        )
+        logabsdet = torch.log(derivative_numerator) - 2 * torch.log(denominator)
+
+        return outputs, -logabsdet
+    else:
+        theta = (inputs - input_cumwidths) / input_bin_widths
+        theta_one_minus_theta = theta * (1 - theta)
+
+        numerator = input_heights * (
+            input_delta * theta.pow(2) + input_derivatives * theta_one_minus_theta
+        )
+        denominator = input_delta + (
+            (input_derivatives + input_derivatives_plus_one - 2 * input_delta)
+            * theta_one_minus_theta
+        )
+        outputs = input_cumheights + numerator / denominator
+
+        derivative_numerator = input_delta.pow(2) * (
+            input_derivatives_plus_one * theta.pow(2)
+            + 2 * input_delta * theta_one_minus_theta
+            + input_derivatives * (1 - theta).pow(2)
+        )
+        logabsdet = torch.log(derivative_numerator) - 2 * torch.log(denominator)
+
+        return outputs, logabsdet