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def masktraining_skip_2chan(path_train, path_valid, batch_size, epochs, path_save_model, path_weights_model, plot_name, option, reduction_divisor):
# initializing
#!/usr/bin/env python3
# -*- coding: utf8 -*-
import ctypes
import os
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '1'
os.environ['TF_ENABLE_XLA'] = '1'
os.environ['TF_ENABLE_AUTO_MIXED_PRECISION'] = '1'
os.environ['TF_ENABLE_CUDNN_RNN_TENSOR_OP_MATH_FP32'] = '1'
os.environ['TF_DISABLE_CUDNN_TENSOR_OP_MATH'] = '1'
os.environ['TF_ENABLE_CUBLAS_TENSOR_OP_MATH_FP32'] = '1'
import numpy as np
import tensorflow as tf
from tensorflow import keras
from keras.layers import Add, Multiply, Input, Dense, Flatten, Dropout, Conv2D, MaxPooling2D, Conv2DTranspose, LeakyReLU, Reshape, Activation, BatchNormalization, UpSampling2D
from keras.models import Model
from keras.constraints import max_norm
from keras.optimizers import Adam, SGD
from keras.utils import to_categorical, normalize
from keras.callbacks import ModelCheckpoint
from keras import losses
from keras import backend as K
import matplotlib.pyplot as plt
import random
# checking for gpus and using it/them
gpus = tf.config.experimental.list_physical_devices('GPU')
if gpus:
try:
tf.config.experimental.set_virtual_device_configuration(gpus[0], [tf.config.experimental.VirtualDeviceConfiguration(memory_limit=4096)])
except RuntimeError as e:
print(e)
# custom generator import
from Generators.MaskGenerator2 import DataGenerator
# ERSETZEN!
def count_files(dir):
return len([1 for x in list(os.scandir(dir)) if x.is_file()])
len_train = count_files(path_train)
len_valid = count_files(path_valid)
# generators for train and validation data
train_generator = DataGenerator(path_train, option, reduction_divisor, len_train, batch_size, True)
valid_generator = DataGenerator(path_valid, option, reduction_divisor, len_valid, batch_size, True)
# building model
def build_model():
max_norm_value = 100.0
# defining inputs and normalizing just noisy input
input_noisy = Input(shape=(260,5,2))
input_noise = Input(shape=(260,1,2))
input_speech = Input(shape=(260,1,2))
normalized_noisy = BatchNormalization()(input_noisy)
# normalized_noise = BatchNormalization()(input_noise)
# normalized_speech = BatchNormalization()(input_speech)
# encoder of net
conv_1 = Conv2D(filters=64, kernel_size=(1,3),strides=1,padding="valid",kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(normalized_noisy)
leakyrelu_1 = LeakyReLU()(conv_1)
conv_2 = Conv2D(filters=64, kernel_size=(1,3),strides=1,padding="valid",kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(leakyrelu_1)
leakyrelu_2 = LeakyReLU()(conv_2)
conv_3 = Conv2D(filters=64, kernel_size=(16,1),strides=1,padding="same", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(leakyrelu_2)
leakyrelu_3 = LeakyReLU()(conv_3)
maxpool_1 = MaxPooling2D(pool_size=(2,1))(leakyrelu_3)
conv_4 = Conv2D(filters=64, kernel_size=(16,1),strides=1,padding="same", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(maxpool_1)
leakyrelu_4 = LeakyReLU()(conv_4)
maxpool_2 = MaxPooling2D(pool_size=(2,1))(leakyrelu_4)
conv_5 = Conv2D(filters=64, kernel_size=(16,1),strides=1,padding="valid", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(maxpool_2)
leakyrelu_5 = LeakyReLU()(conv_5)
conv_6 = Conv2D(filters=64, kernel_size=(16,1),strides=1,padding="valid", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(leakyrelu_5)
leakyrelu_6 = LeakyReLU()(conv_6)
# decoder of Net
convtrans_1 = Conv2DTranspose(filters=64, kernel_size=(16,1),strides=1,padding="valid", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(leakyrelu_6)
leakyrelu_7 = LeakyReLU()(convtrans_1)
convtrans_2 = Conv2DTranspose(filters=64, kernel_size=(16,1),strides=1, padding="valid", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(leakyrelu_7)
leakyrelu_8 = LeakyReLU()(convtrans_2)
skip_1 = Add()([maxpool_2,leakyrelu_8])
up_1 = UpSampling2D(size=(2,1))(skip_1)
conv_7 = Conv2D(filters=64, kernel_size=(16,1), strides=1, padding="same", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(up_1)
leakyrelu_9 = LeakyReLU()(conv_7)
skip_2 = Add()([leakyrelu_4,leakyrelu_9])
up_2 = UpSampling2D(size=(2,1))(skip_2)
conv_8 = Conv2D(filters=64, kernel_size=(16,1), strides=1, padding="same", kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(up_2)
leakyrelu_10 = LeakyReLU()(conv_8)
skip_3 = Add()([leakyrelu_3,leakyrelu_10])
# mask from noisy input
mask = Conv2D(filters=2, kernel_size=(16,1),strides=1, padding="same", activation='linear', kernel_constraint=max_norm(max_norm_value), kernel_initializer="he_normal")(skip_3)
# filtered speech and noise component
n_tilde = Multiply()([mask,input_noise])
s_tilde = Multiply()([mask,input_speech])
# defining model
model = Model(inputs=[input_noisy,input_noise,input_speech], outputs=[n_tilde,s_tilde])
return model
# if __name__ == "__main__":
# build model and compile it
model = build_model()
model.compile(loss='mse', loss_weights=[0.5, 0.5], optimizer='adam', metrics=['mape','accuracy'])
# making directory for weights
if not os.path.exists(path_weights_model):
try:
os.makedirs(path_weights_model)
except Exception as e:
print("Konnte Ordner fuer Gewichte nicht erstellen" + str(e))
# defining how weights are saved
filepath = path_weights_model + "/weights-{epoch:04d}.hdf5"
checkpoint = ModelCheckpoint(
filepath,
monitor='loss',
verbose=0,
save_best_only=True,
mode='min'
)
model.summary()
# train model
history = model.fit(train_generator, steps_per_epoch = int(np.floor(len_train // reduction_divisor / batch_size)), epochs = epochs, validation_data = valid_generator, validation_steps = int(np.floor(len_valid // reduction_divisor / batch_size)), callbacks=[checkpoint], use_multiprocessing=True)
model.summary()
# save model after training
model.save(path_save_model)
index = path_save_model.split("/")
path_save_nomodel = '/'.join(index[0:-1])
loss = history.history["loss"]
multiply_1_loss = history.history["multiply_1_loss"]
multiply_2_loss = history.history["multiply_2_loss"]
multiply_1_mape = history.history["multiply_1_mape"]
multiply_2_mape = history.history["multiply_2_mape"]
multiply_1_accuracy = history.history["multiply_1_accuracy"]
multiply_2_accuracy = history.history["multiply_2_accuracy"]
val_loss = history.history["val_loss"]
val_multiply_1_loss = history.history["val_multiply_1_loss"]
val_multiply_2_loss = history.history["val_multiply_2_loss"]
val_multiply_1_mape = history.history["val_multiply_1_mape"]
val_multiply_2_mape = history.history["val_multiply_2_mape"]
val_multiply_1_accuracy = history.history["val_multiply_1_accuracy"]
val_multiply_2_accuracy = history.history["val_multiply_2_accuracy"]
dict_history = {'loss':loss, 'multiply_1_loss':multiply_1_loss, 'multiply_2_loss':multiply_2_loss, 'multiply_1_mape':multiply_1_mape, 'multiply_2_mape':multiply_2_mape, 'multiply_1_accuracy':multiply_1_accuracy, 'multiply_2_accuracy':multiply_2_accuracy, 'val_loss':val_loss, 'val_multiply_1_loss':val_multiply_1_loss, 'val_multiply_2_loss':val_multiply_2_loss, 'val_multiply_1_mape':val_multiply_1_mape, 'val_multiply_2_mape':val_multiply_2_mape, 'val_multiply_1_accuracy':val_multiply_1_accuracy, 'val_multiply_2_accuracy':val_multiply_2_accuracy}
# loss_history = history.history["loss"]
# mape_history = history.history["mape"]
# accuracy_history = history.history["accuracy"]
# val_loss_history = history.history["val_loss"]
# val_mape_history = history.history["val_mape"]
# val_accuracy_history = history.history["val_accuracy"]
#
# dict_history = {'loss':loss_history, 'mape':mape_history, 'accuracy':accuracy_history, 'val_loss':val_loss_history, 'val_mape':val_mape_history, 'val_accuracy':val_accuracy_history}
np.save(path_save_nomodel + '/' + plot_name, dict_history)
# plot train loss and validation loss after training
plt.style.use("ggplot")
plt.figure()
plt.plot(history.history["loss"], label="train_loss")
plt.plot(history.history["val_loss"], label="val_loss")
plt.title("Training Loss and Accuracy")
plt.xlabel("Epochs")
plt.ylabel("Loss/Accuracy")
plt.legend(loc="lower left")
index = path_save_model.split("/")
path_save_nomodel = '/'.join(index[0:-1])
plt.savefig(path_save_nomodel + '/' + plot_name + '.png', dpi=400)
plt.show()
return