def insight(self,
data,
spklist,
batch_type="softmax",
output_embeddings=False,
aux_data=None):
"""Just use to debug the network
"""
self.sess.run(tf.global_variables_initializer())
self.sess.run(tf.local_variables_initializer())
assert batch_type == "softmax" or batch_type == "end2end", "The batch_type can only be softmax or end2end"
embeddings_val = None
labels_val = None
self.load()
if output_embeddings:
# If we want to output embeddings, the features should be loaded in order
data_loader = KaldiDataSeqQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
batch_size=self.params.num_speakers_per_batch *
self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=False)
data_loader.start()
tf.logging.info("Generate valid embeddings.")
# In this mode, the embeddings and labels will be saved and output. It needs more memory and takes longer
# to process these values.
while True:
try:
features, labels = data_loader.fetch()
valid_emb_val, valid_labels_val, endpoints_val = self.sess.run(
[self.embeddings, self.valid_labels, self.endpoints],
feed_dict={
self.valid_features: features,
self.valid_labels: labels
})
# acc = np.sum(np.equal(np.argmax(endpoints_val['logits'], axis=1), labels, dtype=np.float)) / float(
# labels.shape[0])
# print("Acc: %f" % acc)
# Save the embeddings and labels
if embeddings_val is None:
embeddings_val = valid_emb_val
labels_val = valid_labels_val
else:
embeddings_val = np.concatenate(
(embeddings_val, valid_emb_val), axis=0)
labels_val = np.concatenate(
(labels_val, valid_labels_val), axis=0)
except DataOutOfRange:
break
data_loader.stop()
if batch_type == "softmax":
data_loader = KaldiDataSeqQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
batch_size=self.params.num_speakers_per_batch *
self.params.num_segments_per_speaker * 10,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
elif batch_type == "end2end":
# The num_valid_speakers_per_batch and num_valid_segments_per_speaker are only required when
# End2End loss is used. Since we switch the loss function to softmax generalized e2e loss
# when the e2e loss is used.
assert "num_valid_speakers_per_batch" in self.params.dict and "num_valid_segments_per_speaker" in self.params.dict, \
"Valid parameters should be set if E2E loss is selected"
data_loader = KaldiDataRandomQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
num_speakers=self.params.num_valid_speakers_per_batch,
num_segments=self.params.num_valid_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
else:
raise ValueError
data_loader.start()
while True:
try:
features, labels = data_loader.fetch()
_, endpoints_val = self.sess.run(
[self.valid_ops["valid_loss_op"], self.endpoints],
feed_dict={
self.valid_features: features,
self.valid_labels: labels
})
except DataOutOfRange:
break
data_loader.stop()
loss = self.sess.run(self.valid_ops["valid_loss"])
tf.logging.info(
"Shorter segments are used to test the valid loss (%d-%d)" %
(self.params.min_segment_len, self.params.max_segment_len))
tf.logging.info("Loss: %f" % loss)
# while True:
# try:
# features, labels = data_loader.fetch()
# valid_ops, endpoints_val = self.sess.run([self.valid_ops, self.endpoints], feed_dict={self.valid_features: features,
# self.valid_labels: labels})
# loss = valid_ops["valid_loss"]
# except DataOutOfRange:
# break
# data_loader.stop()
# tf.logging.info("Loss: %f" % loss)
acc = np.sum(
np.equal(np.argmax(endpoints_val['logits'], axis=1),
labels,
dtype=np.float)) / float(labels.shape[0])
print("Acc: %f" % acc)
import pdb
pdb.set_trace()
# from model.test_utils import softmax
# with tf.variable_scope("softmax", reuse=True):
# test = tf.get_variable("output/kernel")
# test_val = self.sess.run(test)
return loss, embeddings_val, labels_val
if os.path.isfile(os.path.join(model_dir, "learning_rate")):
learning_rate_array = load_lr(
os.path.join(model_dir, "learning_rate"))
assert len(
learning_rate_array
) == start_epoch + 1, "Not enough learning rates in the learning_rate file."
else:
learning_rate_array = [float(learning_rate)] * (start_epoch + 1)
dim = FeatureReader(args.train_dir).get_dim()
if "selected_dim" in params.dict:
dim = params.selected_dim
with open(os.path.join(model_dir, "feature_dim"), "w") as f:
f.write("%d\n" % dim)
num_total_train_speakers = KaldiDataRandomQueue(
args.train_dir, args.train_spklist).num_total_speakers
tf.logging.info(
"There are %d speakers in the training set and the dim is %d" %
(num_total_train_speakers, dim))
min_valid_loss = ValidLoss()
if os.path.isfile(os.path.join(model_dir, "valid_loss")):
min_valid_loss = load_valid_loss(os.path.join(model_dir, "valid_loss"))
# The trainer is used to control the training process
if args.num_gpus == 1:
trainer = Trainer(params, args.finetune_model, dim,
num_total_train_speakers)
else:
if (params.num_speakers_per_batch *
params.num_segments_per_speaker) % args.num_gpus != 0:
def valid(self,
data,
spklist,
batch_type="softmax",
output_embeddings=False,
aux_data=None):
"""Evaluate on the validation set
Args:
data: The training data directory.
spklist: The spklist is a file map speaker name to the index.
batch_type: `softmax` or `end2end`. The batch is `softmax-like` or `end2end-like`.
If the batch is `softmax-like`, each sample are from different speakers;
if the batch is `end2end-like`, the samples are from N speakers with M segments per speaker.
output_embeddings: Set True to output the corresponding embeddings and labels of the valid set.
If output_embeddings, an additional valid metric (e.g. EER) should be computed outside
the function.
aux_data: The auxiliary data directory.
:return: valid_loss, embeddings and labels (None if output_embeddings is False).
"""
# Initialization will reset all the variables in the graph.
# The local variables are also need to be initialized for metrics function.
self.sess.run(tf.global_variables_initializer())
self.sess.run(tf.local_variables_initializer())
assert batch_type == "softmax" or batch_type == "end2end", "The batch_type can only be softmax or end2end"
curr_step = 0
# Load the model. The valid function can only be called after training (of course...)
if os.path.isfile(os.path.join(self.model, "checkpoint")):
curr_step = self.load()
else:
tf.logging.info(
"[Warning] Cannot find model in %s. Random initialization is used in validation."
% self.model)
embeddings_val = None
labels_val = None
num_batches = 0
if output_embeddings:
# If we want to output embeddings, the features should be loaded in order
data_loader = KaldiDataSeqQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
batch_size=self.params.num_speakers_per_batch *
self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=False)
data_loader.start()
tf.logging.info("Generate valid embeddings.")
# In this mode, the embeddings and labels will be saved and output. It needs more memory and takes longer
# to process these values.
while True:
try:
if num_batches % 100 == 0:
tf.logging.info("valid step: %d" % num_batches)
features, labels = data_loader.fetch()
valid_emb_val, valid_labels_val = self.sess.run(
[self.embeddings, self.valid_labels],
feed_dict={
self.valid_features: features,
self.valid_labels: labels,
self.global_step: curr_step
})
# Save the embeddings and labels
if embeddings_val is None:
embeddings_val = valid_emb_val
labels_val = valid_labels_val
else:
embeddings_val = np.concatenate(
(embeddings_val, valid_emb_val), axis=0)
labels_val = np.concatenate(
(labels_val, valid_labels_val), axis=0)
num_batches += 1
except DataOutOfRange:
break
data_loader.stop()
if batch_type == "softmax":
data_loader = KaldiDataSeqQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
batch_size=self.params.num_speakers_per_batch *
self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
elif batch_type == "end2end":
# The num_valid_speakers_per_batch and num_valid_segments_per_speaker are only required when
# End2End loss is used. Since we switch the loss function to softmax generalized e2e loss
# when the e2e loss is used.
assert "num_valid_speakers_per_batch" in self.params.dict and "num_valid_segments_per_speaker" in self.params.dict, \
"Valid parameters should be set if E2E loss is selected"
data_loader = KaldiDataRandomQueue(
data,
spklist,
num_parallel=2,
max_qsize=10,
num_speakers=self.params.num_valid_speakers_per_batch,
num_segments=self.params.num_valid_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
else:
raise ValueError
data_loader.start()
num_batches = 0
for _ in range(self.params.valid_max_iterations):
try:
if num_batches % 100 == 0:
tf.logging.info("valid step: %d" % num_batches)
features, labels = data_loader.fetch()
_ = self.sess.run(self.valid_ops["valid_loss_op"],
feed_dict={
self.valid_features: features,
self.valid_labels: labels,
self.global_step: curr_step
})
num_batches += 1
except DataOutOfRange:
break
data_loader.stop()
loss, summary = self.sess.run(
[self.valid_ops["valid_loss"], self.valid_summary])
# We only save the summary for the last batch.
self.valid_summary_writer.add_summary(summary, curr_step)
# The valid loss is averaged over all the batches.
tf.logging.info("[Validation %d batches] valid loss: %f" %
(num_batches, loss))
# The output embeddings and labels can be used to compute EER or other metrics
return loss, embeddings_val, labels_val
def train_tune_lr(self, data, spklist, tune_period=100, aux_data=None):
"""Tune the learning rate.
According to: https://www.kdnuggets.com/2017/11/estimating-optimal-learning-rate-deep-neural-network.html
Args:
data: The training data directory.
spklist: The spklist is a file map speaker name to the index.
tune_period: How many steps per learning rate.
aux_data: The auxiliary data directory.
"""
# initialize all variables
self.sess.run(tf.global_variables_initializer())
# We need to load the model sometimes, since we may try to find the learning rate for fine-tuning.
if os.path.isfile(os.path.join(self.model, "checkpoint")):
self.load()
data_loader = KaldiDataRandomQueue(
data,
spklist,
num_parallel=self.params.num_parallel_datasets,
max_qsize=self.params.max_queue_size,
num_speakers=self.params.num_speakers_per_batch,
num_segments=self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
data_loader.start()
# The learning rate normally varies from 1e-5 to 1
# Some common values:
# 1. factor = 1.15
# tune_period = 200
# tune_times = 100
init_learning_rate = 1e-5
factor = 1.15
tune_times = 100
fp_lr = open(os.path.join(self.model, "learning_rate_tuning"), "w")
for step in range(tune_period * tune_times):
lr = init_learning_rate * (factor**(step // tune_period))
try:
if step % tune_period == 0:
train_ops = [
self.train_ops, self.train_op, self.train_summary
]
# train_ops = [self.train_ops, self.train_op]
start_time = time.time()
features, labels = data_loader.fetch()
train_val = self.sess.run(train_ops,
feed_dict={
self.train_features:
features,
self.train_labels: labels,
self.global_step: 0,
self.learning_rate: lr
})
end_time = time.time()
tf.logging.info(
"Epoch: step: %2d, time: %.4f s/step, lr: %f, raw loss: %f, total loss: %f" \
% (step, end_time - start_time, lr,
train_val[0]["raw_loss"], train_val[0]["loss"]))
fp_lr.write("%d %f %f\n" %
(step, lr, train_val[0]["loss"]))
self.summary_writer.add_summary(train_val[-1], step)
else:
features, labels = data_loader.fetch()
_ = self.sess.run(self.train_op,
feed_dict={
self.train_features: features,
self.train_labels: labels,
self.global_step: 0,
self.learning_rate: lr
})
except DataOutOfRange:
tf.logging.info("Finished reading features.")
break
data_loader.stop()
fp_lr.close()
return
def train(self, data, spklist, learning_rate, aux_data=None):
"""Train the model.
Args:
data: The training data directory.
spklist: The spklist is a file map speaker name to the index.
learning_rate: The learning rate is passed by the main program. The main program can easily tune the
learning rate according to the validation accuracy or anything else.
aux_data: The auxiliary data (maybe useful in child class.)
"""
# initialize all variables
self.sess.run(tf.global_variables_initializer())
# curr_step is the real step the training at.
curr_step = 0
# Load the model if we have
if os.path.isfile(os.path.join(self.model, "checkpoint")):
curr_step = self.load()
# The data loader
data_loader = KaldiDataRandomQueue(
data,
spklist,
num_parallel=self.params.num_parallel_datasets,
max_qsize=self.params.max_queue_size,
num_speakers=self.params.num_speakers_per_batch,
num_segments=self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
data_loader.start()
epoch = int(curr_step / self.params.num_steps_per_epoch)
for step in range(curr_step % self.params.num_steps_per_epoch,
self.params.num_steps_per_epoch):
try:
if step % self.params.save_summary_steps == 0 or step % self.params.show_training_progress == 0:
train_ops = [self.train_ops, self.train_op]
if step % self.params.save_summary_steps == 0:
train_ops.append(self.train_summary)
start_time = time.time()
features, labels = data_loader.fetch()
train_val = self.sess.run(train_ops,
feed_dict={
self.train_features:
features,
self.train_labels: labels,
self.global_step: curr_step,
self.learning_rate:
learning_rate
})
end_time = time.time()
tf.logging.info(
"Epoch: [%2d] step: [%2d/%2d] time: %.4f s/step, raw loss: %f, total loss: %f"
% (epoch, step, self.params.num_steps_per_epoch,
end_time - start_time, train_val[0]["raw_loss"],
train_val[0]["loss"]))
if step % self.params.save_summary_steps == 0:
self.summary_writer.add_summary(
train_val[-1], curr_step)
else:
# Only compute optimizer.
features, labels = data_loader.fetch()
_ = self.sess.run(self.train_op,
feed_dict={
self.train_features: features,
self.train_labels: labels,
self.global_step: curr_step,
self.learning_rate: learning_rate
})
if step % self.params.save_checkpoints_steps == 0 and curr_step != 0:
self.save(curr_step)
curr_step += 1
except DataOutOfRange:
tf.logging.info("Finished reading features.")
break
data_loader.stop()
self.save(curr_step)
return
def train(self, data, spklist, learning_rate, aux_data=None):
"""Train the model.
Args:
data: The training data directory.
spklist: The spklist is a file map speaker name to the index.
learning_rate: The learning rate is passed by the main program. The main program can easily tune the
learning rate according to the validation accuracy or anything else.
aux_data: The auxiliary data (maybe useful in child class.)
"""
# initialize all variables
# graph = tf.get_default_graph()
# kernel_six = graph.get_tensor_by_name('tdnn_svd6/tdnn6.5_dense/kernel:0')
# def get_semi_orthogonal(mat):
#pri# nt(mat.shape)
# M = tf.transpose(mat)
# #M = mat
# I = tf.Variable(np.identity(M.shape[0]), dtype=tf.float32)
# for _ in range(10):
# P = tf.matmul(M, M, transpose_b=True)
# alpha2 = tf.divide(tf.trace(tf.matmul(P, P, transpose_b=True)), tf.trace(P))
# M = M - (1 / (2.0 * alpha2)) * tf.matmul(tf.subtract(P, alpha2 * I), M)
# P = tf.matmul(M, M, transpose_b=True)
# alpha2 = tf.divide(tf.trace(tf.matmul(P, P, transpose_b=True)), tf.trace(P))
# M = M / alpha2
# return tf.transpose(M)
# semi = get_semi_orthogonal(kernel_six)
# semi_op = tf.assign(kernel_six, semi)
self.sess.run(tf.global_variables_initializer())
# curr_step is the real step the training at.
curr_step = 0
# Load the model if we have
if os.path.isfile(os.path.join(self.model, "checkpoint")):
curr_step = self.load()
# The data loader
data_loader = KaldiDataRandomQueue(data, spklist,
num_parallel=self.params.num_parallel_datasets,
max_qsize=self.params.max_queue_size,
num_speakers=self.params.num_speakers_per_batch,
num_segments=self.params.num_segments_per_speaker,
min_len=self.params.min_segment_len,
max_len=self.params.max_segment_len,
shuffle=True)
epoch = int(curr_step / self.params.num_steps_per_epoch)
data_loader.start()
for step in range(curr_step % self.params.num_steps_per_epoch, self.params.num_steps_per_epoch):
try:
# if step % 4 == 0:
# # SEMI ORTHOGONA;
# self.sess.run(semi_op)
if step % self.params.save_summary_steps == 0 or step % self.params.show_training_progress == 0:
train_ops = [self.train_ops, self.train_op]
if step % self.params.save_summary_steps == 0:
train_ops.append(self.train_summary)
start_time = time.time()
features, labels = data_loader.fetch()
train_val = self.sess.run(train_ops, feed_dict={self.train_features: features,
self.train_labels: labels,
self.global_step: curr_step,
self.learning_rate: learning_rate})
end_time = time.time()
tf.logging.info(
"Epoch: [%2d] step: [%2d/%2d] time: %.4f s/step, raw loss: %f, total loss: %f"
% (epoch, step, self.params.num_steps_per_epoch, end_time - start_time,
train_val[0]["raw_loss"], train_val[0]["loss"]))
if step % self.params.save_summary_steps == 0:
self.summary_writer.add_summary(train_val[-1], curr_step)
else:
# Only compute optimizer.
features, labels = data_loader.fetch()
_ = self.sess.run(self.train_op, feed_dict={self.train_features: features,
self.train_labels: labels,
self.global_step: curr_step,
self.learning_rate: learning_rate})
if step % self.params.save_checkpoints_steps == 0 and curr_step != 0:
self.save(curr_step)
curr_step += 1
except DataOutOfRange:
tf.logging.info("Finished reading features.")
break
data_loader.stop()
self.save(curr_step)
return
# Disable GPU
os.environ["CUDA_VISIBLE_DEVICES"] = "-1"
import tensorflow as tf
if __name__ == '__main__':
tf.reset_default_graph()
tf.logging.set_verbosity(tf.logging.INFO)
nnet_dir = os.path.join(args.model_dir, "nnet")
config_json = os.path.join(args.model_dir, "nnet/config.json")
if not os.path.isfile(config_json):
sys.exit("Cannot find params.json in %s" % config_json)
params = Params(config_json)
# First, we need to extract the weights
num_total_train_speakers = KaldiDataRandomQueue(
os.path.dirname(args.spklist), args.spklist).num_total_speakers
dim = FeatureReader(os.path.dirname(args.spklist)).get_dim()
if "selected_dim" in params.dict:
dim = params.selected_dim
trainer = Trainer(params,
args.model_dir,
dim,
num_total_train_speakers,
single_cpu=True)
trainer.build("valid")
trainer.sess.run(tf.global_variables_initializer())
trainer.sess.run(tf.local_variables_initializer())
if not args.init:
curr_step = trainer.load()
else: