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config.json

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+{
+  "architectures": [
+    "SERModel"
+  ],
+  "auto_map": {
+    "AutoConfig": "pipeline_utils.SERConfig",
+    "AutoModelForAudioClassification": "pipeline_utils.SERModel"
+  },
+  "classifier_dropout_prob": 0.5,
+  "classifier_hidden_layers": 1,
+  "hidden_size": 1024,
+  "model_type": "ser",
+  "num_attention_heads": 16,
+  "num_classes": 1,
+  "num_hidden_layers": 24,
+  "ssl_type": "microsoft/wavlm-large",
+  "torch_dtype": "float32",
+  "transformers_version": "4.34.0.dev0"
+}

pipeline_utils.py

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+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from transformers import AutoModel
+from transformers.modeling_utils import PreTrainedModel ,PretrainedConfig
+
+
+class Pooling(nn.Module):
+    def __init__(self):
+        super().__init__()
+    def compute_length_from_mask(self, mask):
+        """
+        mask: (batch_size, T)
+        Assuming that the sampling rate is 16kHz, the frame shift is 20ms
+        """
+        wav_lens = torch.sum(mask, dim=1) # (batch_size, )
+        feat_lens = torch.div(wav_lens-1, 16000*0.02, rounding_mode="floor") + 1
+        feat_lens = feat_lens.int().tolist()
+        return feat_lens
+        
+    def forward(self, x, mask):
+        raise NotImplementedError
+    
+class MeanPooling(Pooling):
+    def __init__(self):
+        super().__init__()
+    def forward(self, xs, mask):
+        """
+        xs: (batch_size, T, feat_dim)
+        mask: (batch_size, T)
+
+        => output: (batch_size, feat_dim)
+        """
+        feat_lens = self.compute_length_from_mask(mask)
+        pooled_list = []
+        for x, feat_len in zip(xs, feat_lens):
+            pooled = torch.mean(x[:feat_len], dim=0) # (feat_dim, )
+            pooled_list.append(pooled)
+        pooled = torch.stack(pooled_list, dim=0) # (batch_size, feat_dim)
+        return pooled
+    
+
+class AttentiveStatisticsPooling(Pooling):
+    """
+    AttentiveStatisticsPooling
+    Paper: Attentive Statistics Pooling for Deep Speaker Embedding
+    Link: https://arxiv.org/pdf/1803.10963.pdf
+    """
+    def __init__(self, input_size):
+        super().__init__()
+        self._indim = input_size
+        self.sap_linear = nn.Linear(input_size, input_size)
+        self.attention = nn.Parameter(torch.FloatTensor(input_size, 1))
+        torch.nn.init.normal_(self.attention, mean=0, std=1)
+
+    def forward(self, xs, mask):
+        """
+        xs: (batch_size, T, feat_dim)
+        mask: (batch_size, T)
+
+        => output: (batch_size, feat_dim*2)
+        """
+        feat_lens = self.compute_length_from_mask(mask)
+        pooled_list = []
+        for x, feat_len in zip(xs, feat_lens):
+            x = x[:feat_len].unsqueeze(0)
+            h = torch.tanh(self.sap_linear(x))
+            w = torch.matmul(h, self.attention).squeeze(dim=2)
+            w = F.softmax(w, dim=1).view(x.size(0), x.size(1), 1)
+            mu = torch.sum(x * w, dim=1)
+            rh = torch.sqrt((torch.sum((x**2) * w, dim=1) - mu**2).clamp(min=1e-5))
+            x = torch.cat((mu, rh), 1).squeeze(0)
+            pooled_list.append(x)
+        return torch.stack(pooled_list)
+
+
+
+    
+class EmotionRegression(nn.Module):
+    def __init__(self, *args, **kwargs):
+        super(EmotionRegression, self).__init__()
+        input_dim = args[0]
+        hidden_dim = args[1]
+        num_layers = args[2]
+        output_dim = args[3]
+        p = kwargs.get("dropout", 0.5)
+
+        self.fc=nn.ModuleList([
+            nn.Sequential(
+                nn.Linear(input_dim, hidden_dim), nn.LayerNorm(hidden_dim), nn.ReLU(), nn.Dropout(p)
+            )
+        ])
+        for lidx in range(num_layers-1):
+            self.fc.append(
+                nn.Sequential(
+                    nn.Linear(hidden_dim, hidden_dim), nn.LayerNorm(hidden_dim), nn.ReLU(), nn.Dropout(p)
+                )
+            )
+        self.out = nn.Sequential(
+            nn.Linear(hidden_dim, output_dim)
+        )
+        
+        self.inp_drop = nn.Dropout(p)
+    def get_repr(self, x):
+        h = self.inp_drop(x)
+        for lidx, fc in enumerate(self.fc):
+            h=fc(h)
+        return h
+    
+    def forward(self, x):
+        h=self.get_repr(x)
+        result = self.out(h)
+        return result
+    
+class SERConfig(PretrainedConfig):
+    model_type = "ser"
+
+    def __init__(
+        self,
+        num_classes: int = 1,
+        num_attention_heads = 16,
+        num_hidden_layers = 24,
+        hidden_size = 1024,
+        classifier_hidden_layers = 1,
+        classifier_dropout_prob  = 0.5,
+        ssl_type= "microsoft/wavlm-large",
+        torch_dtype= "float32",
+        **kwargs,
+    ):
+        self.num_classes = num_classes
+        self.num_attention_heads = num_attention_heads
+        self.num_hidden_layers = num_hidden_layers
+        self.hidden_size = hidden_size
+        self.classifier_hidden_layers = classifier_hidden_layers
+        self.classifier_dropout_prob = classifier_dropout_prob
+        self.ssl_type = ssl_type
+        self.torch_dtype = torch_dtype
+        super().__init__(**kwargs)
+        
+class SERModel(PreTrainedModel):
+    config_class = SERConfig
+    
+    def __init__(self, config):
+        super().__init__(config)
+        self.ssl_model = AutoModel.from_pretrained(config.ssl_type)
+        self.ssl_model.freeze_feature_encoder()
+        
+        self.pool_model = AttentiveStatisticsPooling(config.hidden_size)
+    
+        self.ser_model = EmotionRegression(config.hidden_size*2, 
+                                               config.hidden_size, 
+                                               config.classifier_hidden_layers, 
+                                               config.num_classes, 
+                                               dropout=config.classifier_dropout_prob)
+        
+        
+    def forward(self, x, mask):
+        ssl = self.ssl_model(x, attention_mask=mask).last_hidden_state
+
+        ssl = self.pool_model(ssl, mask)
+        
+        pred = self.ser_model(ssl)
+        
+        return pred
+    

pytorch_model.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:8ca8929ea564b56819ed846e96b1a472df11fa39d63f540108bab62c84b269b8
+size 1274585617