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models/model.py

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+import numpy as np # linear algebra
+import pandas as pd
+import os
+import matplotlib.pylab as plt
+
+import librosa as lr
+import torch
+import torch.nn as nn
+import pytorch_lightning as pl
+import gradio
+
+# HYPERPARAMS
+EPOCHS = 200
+BATCH_SIZE = 32
+NUM_OF_CLASSES = 14
+
+class MFCC_CNN(pl.LightningModule):
+    def __init__(self, num_of_classes):
+        super(MFCC_CNN, self).__init__()
+
+        self.example_input_array = torch.Tensor(32, 1, 50, 94)
+        self.train_loss_output = []
+        self.train_acc_output = []
+        self.val_acc_output = []
+        self.val_loss_output = []
+
+        self.number_of_classes = num_of_classes
+
+        self.conv_1 = nn.Sequential(
+            nn.Conv2d(in_channels = 1, 
+                      out_channels = 64, 
+                      kernel_size =3,
+                      padding = 1,
+                      stride = 1),
+            nn.BatchNorm2d(64),
+            nn.LeakyReLU(),
+            nn.MaxPool2d(kernel_size=2),
+            nn.Dropout(0.1)
+        )
+
+        self.conv_2 = nn.Sequential(
+            nn.Conv2d(in_channels = 64, 
+                      out_channels = 128, 
+                      kernel_size = 3,
+                      padding = 1,
+                      stride = 1),
+            nn.BatchNorm2d(128),
+            nn.LeakyReLU(),
+            nn.MaxPool2d(kernel_size=2),
+            nn.Dropout(0.1)
+        )
+
+        self.conv_3 = nn.Sequential(
+            nn.Conv2d(in_channels = 128, 
+                      out_channels = 256, 
+                      kernel_size = 3,
+                      padding = 1,
+                      stride = 1),
+            nn.BatchNorm2d(256),
+            nn.LeakyReLU(),
+            nn.MaxPool2d(kernel_size=2),
+            nn.Dropout(0.1)
+        )
+
+        self.conv_4 = nn.Sequential(
+            nn.Conv2d(in_channels = 256, 
+                      out_channels = 512,
+                      kernel_size = 3,
+                      padding = 1,
+                      stride = 1),
+            nn.BatchNorm2d(512),
+            nn.LeakyReLU(),
+            nn.MaxPool2d(kernel_size=2)
+        )
+
+        self.conv_5 = nn.Sequential(
+            nn.Conv2d(in_channels = 512, 
+                      out_channels = 512, 
+                      kernel_size = 2,
+                      padding = 0,
+                      stride = 1),
+            nn.BatchNorm2d(512),
+            nn.LeakyReLU(),
+            nn.MaxPool2d(kernel_size=2)
+        )
+
+        self.drop = nn.Dropout(0.1)
+        self.lin_1 = nn.Linear(1024, 128)
+        self.lin_2 = nn.Linear(128, 64)
+        self.lin_3 = nn.Linear(64, num_of_classes)
+
+        self.relu = nn.ReLU()
+        self.softmax = nn.Softmax()
+           
+    def forward(self, x):
+        out = self.conv_1(x)
+        out = self.conv_2(out)
+        out = self.conv_3(out)
+        out = self.conv_4(out)
+        out = self.conv_5(out)
+
+        out = torch.flatten(out, start_dim=1)
+
+        out = self.drop(self.lin_1(self.relu(out)))
+        out = self.drop(self.lin_2(self.relu(out)))
+        out = self.drop(self.lin_3(self.relu(out)))
+        
+        out = self.softmax(out)
+
+        return out
+
+    def loss_fn(self, out, target):
+        return nn.CrossEntropyLoss()(input=out.view(-1, self.number_of_classes),
+                                     target=target)
+
+    def configure_optimizers(self):
+        LR=1e-3
+        optimizer = torch.optim.Adam(self.parameters(), lr=LR, weight_decay=1e-3)
+        scheduler = torch.optim.lr_scheduler.ReduceLROnPlateau(optimizer,
+                                                               mode='min',
+                                                               factor=0.5,
+                                                               patience=5,
+                                                               verbose=True)
+
+        return {
+                'optimizer': optimizer,
+                "lr_scheduler": {
+                    "scheduler": scheduler,
+                    "monitor": "val_loss",
+                    'interval': 'epoch',
+                    'frequency': 1
+                },
+            }
+
+    def training_step(self, batch, batch_idx):
+        mfcc, lable = batch
+        mfcc = mfcc.view(-1, 1, 50, 94)
+        lable = lable.view(-1, self.number_of_classes)
+        
+        out = self(mfcc)
+        
+        loss = self.loss_fn(out=out, target=lable)
+
+        lable = torch.argmax(lable,dim=1)
+        predictions = torch.argmax(out,dim=1)
+        accuracy = torch.sum(lable==predictions)/float(len(lable))
+
+        self.train_acc_output.append(accuracy.detach().numpy())
+        self.train_loss_output.append(loss.detach().numpy())
+        #wandb.log({'train_accuracy_step': accuracy, 'train_loss_step':loss})\
+
+        self.log('train_accuracy', accuracy, prog_bar=True, on_epoch=True, on_step=False)
+        self.log('train_loss', loss, prog_bar=True, on_epoch=True, on_step=False)
+        return loss
+    
+    def validation_step(self, batch, batch_idx):
+        mfcc, lable = batch
+        mfcc = mfcc.view(-1, 1, 50, 94)
+        lable = lable.view(-1, self.number_of_classes)
+        
+        out = self(mfcc)
+        
+        loss = self.loss_fn(out=out, target=lable)
+        
+        lable = torch.argmax(lable,dim=1)
+        predictions = torch.argmax(out,dim=1)
+        accuracy = torch.sum(lable==predictions)/float(len(lable))
+
+        self.val_acc_output.append(accuracy.detach().numpy())
+        self.val_loss_output.append(loss.detach().numpy())
+        #wandb.log({'val_accuracy_step': accuracy, 'val_loss_step':loss})
+        
+        self.log('val_accuracy', accuracy, prog_bar=True, on_epoch=True)
+        self.log('val_loss', loss, prog_bar=True, on_epoch=True)
+
+        return loss
+    
+    def on_train_epoch_end(self):
+        train_loss_epoch = self.train_loss_output
+        train_acc_epoch = self.train_acc_output
+
+        #wandb.log({'train_loss_epoch':np.mean(train_loss_epoch), 
+        #       'train_acc_epoch':np.mean(train_acc_epoch)})
+
+        self.train_loss_output.clear()
+        self.train_acc_output.clear()
+
+    def on_validation_epoch_end(self):
+        val_loss_epoch = self.val_loss_output
+        val_acc_epoch = self.val_acc_output
+
+        #wandb.log({'val_loss_epoch':np.mean(val_loss_epoch), 
+        #       'val_acc_epoch':np.mean(val_acc_epoch)})
+
+        self.val_acc_output.clear()
+        self.val_loss_output.clear()