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# Copyright 2017 Johns Hopkins University (Shinji Watanabe)
# Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
"""Training/decoding definition for the speech recognition task."""
import copy
import json
import logging
import math
import os
import sys
from chainer import reporter as reporter_module
from chainer import training
from chainer.training import extensions
from chainer.training.updater import StandardUpdater
import numpy as np
from tensorboardX import SummaryWriter
import torch
from torch.nn.parallel import data_parallel
from espnet.asr.asr_utils import adadelta_eps_decay
from espnet.asr.asr_utils import add_results_to_json
from espnet.asr.asr_utils import CompareValueTrigger
from espnet.asr.asr_utils import format_mulenc_args
from espnet.asr.asr_utils import get_model_conf
from espnet.asr.asr_utils import plot_spectrogram
from espnet.asr.asr_utils import restore_snapshot
from espnet.asr.asr_utils import snapshot_object
from espnet.asr.asr_utils import torch_load
from espnet.asr.asr_utils import torch_resume
from espnet.asr.asr_utils import torch_snapshot
from espnet.asr.pytorch_backend.asr_init import freeze_modules
from espnet.asr.pytorch_backend.asr_init import load_trained_model
from espnet.asr.pytorch_backend.asr_init import load_trained_modules
import espnet.lm.pytorch_backend.extlm as extlm_pytorch
from espnet.nets.asr_interface import ASRInterface
from espnet.nets.beam_search_transducer import BeamSearchTransducer
from espnet.nets.pytorch_backend.e2e_asr import pad_list
import espnet.nets.pytorch_backend.lm.default as lm_pytorch
from espnet.nets.pytorch_backend.streaming.segment import SegmentStreamingE2E
from espnet.nets.pytorch_backend.streaming.window import WindowStreamingE2E
from espnet.transform.spectrogram import IStft
from espnet.transform.transformation import Transformation
from espnet.utils.cli_writers import file_writer_helper
from espnet.utils.dataset import ChainerDataLoader
from espnet.utils.dataset import TransformDataset
from espnet.utils.deterministic_utils import set_deterministic_pytorch
from espnet.utils.dynamic_import import dynamic_import
from espnet.utils.io_utils import LoadInputsAndTargets
from espnet.utils.training.batchfy import make_batchset
from espnet.utils.training.evaluator import BaseEvaluator
from espnet.utils.training.iterators import ShufflingEnabler
from espnet.utils.training.tensorboard_logger import TensorboardLogger
from espnet.utils.training.train_utils import check_early_stop
from espnet.utils.training.train_utils import set_early_stop
import matplotlib
matplotlib.use("Agg")
if sys.version_info[0] == 2:
from itertools import izip_longest as zip_longest
else:
from itertools import zip_longest as zip_longest
def _recursive_to(xs, device):
if torch.is_tensor(xs):
return xs.to(device)
if isinstance(xs, tuple):
return tuple(_recursive_to(x, device) for x in xs)
return xs
class CustomEvaluator(BaseEvaluator):
"""Custom Evaluator for Pytorch.
Args:
model (torch.nn.Module): The model to evaluate.
iterator (chainer.dataset.Iterator) : The train iterator.
target (link | dict[str, link]) :Link object or a dictionary of
links to evaluate. If this is just a link object, the link is
registered by the name ``'main'``.
device (torch.device): The device used.
ngpu (int): The number of GPUs.
"""
def __init__(self, model, iterator, target, device, ngpu=None):
super(CustomEvaluator, self).__init__(iterator, target)
self.model = model
self.device = device
if ngpu is not None:
self.ngpu = ngpu
elif device.type == "cpu":
self.ngpu = 0
else:
self.ngpu = 1
# The core part of the update routine can be customized by overriding
def evaluate(self):
"""Main evaluate routine for CustomEvaluator."""
iterator = self._iterators["main"]
if self.eval_hook:
self.eval_hook(self)
if hasattr(iterator, "reset"):
iterator.reset()
it = iterator
else:
it = copy.copy(iterator)
summary = reporter_module.DictSummary()
self.model.eval()
with torch.no_grad():
for batch in it:
x = _recursive_to(batch, self.device)
observation = {}
with reporter_module.report_scope(observation):
# read scp files
# x: original json with loaded features
# will be converted to chainer variable later
if self.ngpu == 0:
self.model(*x)
else:
# apex does not support torch.nn.DataParallel
data_parallel(self.model, x, range(self.ngpu))
summary.add(observation)
self.model.train()
return summary.compute_mean()
class CustomUpdater(StandardUpdater):
"""Custom Updater for Pytorch.
Args:
model (torch.nn.Module): The model to update.
grad_clip_threshold (float): The gradient clipping value to use.
train_iter (chainer.dataset.Iterator): The training iterator.
optimizer (torch.optim.optimizer): The training optimizer.
device (torch.device): The device to use.
ngpu (int): The number of gpus to use.
use_apex (bool): The flag to use Apex in backprop.
"""
def __init__(
self,
model,
grad_clip_threshold,
train_iter,
optimizer,
device,
ngpu,
grad_noise=False,
accum_grad=1,
use_apex=False,
):
super(CustomUpdater, self).__init__(train_iter, optimizer)
self.model = model
self.grad_clip_threshold = grad_clip_threshold
self.device = device
self.ngpu = ngpu
self.accum_grad = accum_grad
self.forward_count = 0
self.grad_noise = grad_noise
self.iteration = 0
self.use_apex = use_apex
# The core part of the update routine can be customized by overriding.
def update_core(self):
"""Main update routine of the CustomUpdater."""
# When we pass one iterator and optimizer to StandardUpdater.__init__,
# they are automatically named 'main'.
train_iter = self.get_iterator("main")
optimizer = self.get_optimizer("main")
epoch = train_iter.epoch
# Get the next batch (a list of json files)
batch = train_iter.next()
# self.iteration += 1 # Increase may result in early report,
# which is done in other place automatically.
x = _recursive_to(batch, self.device)
is_new_epoch = train_iter.epoch != epoch
# When the last minibatch in the current epoch is given,
# gradient accumulation is turned off in order to evaluate the model
# on the validation set in every epoch.
# see details in https://github.com/espnet/espnet/pull/1388
# Compute the loss at this time step and accumulate it
if self.ngpu == 0:
loss = self.model(*x).mean() / self.accum_grad
else:
# apex does not support torch.nn.DataParallel
loss = (
data_parallel(self.model, x, range(self.ngpu)).mean() / self.accum_grad
)
if self.use_apex:
from apex import amp
# NOTE: for a compatibility with noam optimizer
opt = optimizer.optimizer if hasattr(optimizer, "optimizer") else optimizer
with amp.scale_loss(loss, opt) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
# gradient noise injection
if self.grad_noise:
from espnet.asr.asr_utils import add_gradient_noise
add_gradient_noise(
self.model, self.iteration, duration=100, eta=1.0, scale_factor=0.55
)
# update parameters
self.forward_count += 1
if not is_new_epoch and self.forward_count != self.accum_grad:
return
self.forward_count = 0
# compute the gradient norm to check if it is normal or not
grad_norm = torch.nn.utils.clip_grad_norm_(
self.model.parameters(), self.grad_clip_threshold
)
logging.info("grad norm={}".format(grad_norm))
if math.isnan(grad_norm):
logging.warning("grad norm is nan. Do not update model.")
else:
optimizer.step()
optimizer.zero_grad()
def update(self):
self.update_core()
# #iterations with accum_grad > 1
# Ref.: https://github.com/espnet/espnet/issues/777
if self.forward_count == 0:
self.iteration += 1
class CustomConverter(object):
"""Custom batch converter for Pytorch.
Args:
subsampling_factor (int): The subsampling factor.
dtype (torch.dtype): Data type to convert.
"""
def __init__(self, subsampling_factor=1, dtype=torch.float32):
"""Construct a CustomConverter object."""
self.subsampling_factor = subsampling_factor
self.ignore_id = -1
self.dtype = dtype
def __call__(self, batch, device=torch.device("cpu")):
"""Transform a batch and send it to a device.
Args:
batch (list): The batch to transform.
device (torch.device): The device to send to.
Returns:
tuple(torch.Tensor, torch.Tensor, torch.Tensor)
"""
# batch should be located in list
assert len(batch) == 1
xs, ys = batch[0]
# perform subsampling
if self.subsampling_factor > 1:
xs = [x[:: self.subsampling_factor, :] for x in xs]
# get batch of lengths of input sequences
ilens = np.array([x.shape[0] for x in xs])
# perform padding and convert to tensor
# currently only support real number
if xs[0].dtype.kind == "c":
xs_pad_real = pad_list(
[torch.from_numpy(x.real).float() for x in xs], 0
).to(device, dtype=self.dtype)
xs_pad_imag = pad_list(
[torch.from_numpy(x.imag).float() for x in xs], 0
).to(device, dtype=self.dtype)
# Note(kamo):
# {'real': ..., 'imag': ...} will be changed to ComplexTensor in E2E.
# Don't create ComplexTensor and give it E2E here
# because torch.nn.DataParellel can't handle it.
xs_pad = {"real": xs_pad_real, "imag": xs_pad_imag}
else:
xs_pad = pad_list([torch.from_numpy(x).float() for x in xs], 0).to(
device, dtype=self.dtype
)
ilens = torch.from_numpy(ilens).to(device)
# NOTE: this is for multi-output (e.g., speech translation)
ys_pad = pad_list(
[
torch.from_numpy(
np.array(y[0][:]) if isinstance(y, tuple) else y
).long()
for y in ys
],
self.ignore_id,
).to(device)
return xs_pad, ilens, ys_pad
class CustomConverterMulEnc(object):
"""Custom batch converter for Pytorch in multi-encoder case.
Args:
subsampling_factors (list): List of subsampling factors for each encoder.
dtype (torch.dtype): Data type to convert.
"""
def __init__(self, subsamping_factors=[1, 1], dtype=torch.float32):
"""Initialize the converter."""
self.subsamping_factors = subsamping_factors
self.ignore_id = -1
self.dtype = dtype
self.num_encs = len(subsamping_factors)
def __call__(self, batch, device=torch.device("cpu")):
"""Transform a batch and send it to a device.
Args:
batch (list): The batch to transform.
device (torch.device): The device to send to.
Returns:
tuple( list(torch.Tensor), list(torch.Tensor), torch.Tensor)
"""
# batch should be located in list
assert len(batch) == 1
xs_list = batch[0][: self.num_encs]
ys = batch[0][-1]
# perform subsampling
if np.sum(self.subsamping_factors) > self.num_encs:
xs_list = [
[x[:: self.subsampling_factors[i], :] for x in xs_list[i]]
for i in range(self.num_encs)
]
# get batch of lengths of input sequences
ilens_list = [
np.array([x.shape[0] for x in xs_list[i]]) for i in range(self.num_encs)
]
# perform padding and convert to tensor
# currently only support real number
xs_list_pad = [
pad_list([torch.from_numpy(x).float() for x in xs_list[i]], 0).to(
device, dtype=self.dtype
)
for i in range(self.num_encs)
]
ilens_list = [
torch.from_numpy(ilens_list[i]).to(device) for i in range(self.num_encs)
]
# NOTE: this is for multi-task learning (e.g., speech translation)
ys_pad = pad_list(
[
torch.from_numpy(np.array(y[0]) if isinstance(y, tuple) else y).long()
for y in ys
],
self.ignore_id,
).to(device)
return xs_list_pad, ilens_list, ys_pad
def train(args):
"""Train with the given args.
Args:
args (namespace): The program arguments.
"""
set_deterministic_pytorch(args)
if args.num_encs > 1:
args = format_mulenc_args(args)
# check cuda availability
if not torch.cuda.is_available():
logging.warning("cuda is not available")
# get input and output dimension info
with open(args.valid_json, "rb") as f:
valid_json = json.load(f)["utts"]
utts = list(valid_json.keys())
idim_list = [
int(valid_json[utts[0]]["input"][i]["shape"][-1]) for i in range(args.num_encs)
]
odim = int(valid_json[utts[0]]["output"][0]["shape"][-1])
for i in range(args.num_encs):
logging.info("stream{}: input dims : {}".format(i + 1, idim_list[i]))
logging.info("#output dims: " + str(odim))
# specify attention, CTC, hybrid mode
if "transducer" in args.model_module:
if (
getattr(args, "etype", False) == "custom"
or getattr(args, "dtype", False) == "custom"
):
mtl_mode = "custom_transducer"
else:
mtl_mode = "transducer"
logging.info("Pure transducer mode")
elif args.mtlalpha == 1.0:
mtl_mode = "ctc"
logging.info("Pure CTC mode")
elif args.mtlalpha == 0.0:
mtl_mode = "att"
logging.info("Pure attention mode")
else:
mtl_mode = "mtl"
logging.info("Multitask learning mode")
if (args.enc_init is not None or args.dec_init is not None) and args.num_encs == 1:
model = load_trained_modules(idim_list[0], odim, args)
else:
model_class = dynamic_import(args.model_module)
model = model_class(
idim_list[0] if args.num_encs == 1 else idim_list, odim, args
)
assert isinstance(model, ASRInterface)
total_subsampling_factor = model.get_total_subsampling_factor()
logging.info(
" Total parameter of the model = "
+ str(sum(p.numel() for p in model.parameters()))
)
if args.rnnlm is not None:
rnnlm_args = get_model_conf(args.rnnlm, args.rnnlm_conf)
rnnlm = lm_pytorch.ClassifierWithState(
lm_pytorch.RNNLM(len(args.char_list), rnnlm_args.layer, rnnlm_args.unit)
)
torch_load(args.rnnlm, rnnlm)
model.rnnlm = rnnlm
# write model config
if not os.path.exists(args.outdir):
os.makedirs(args.outdir)
model_conf = args.outdir + "/model.json"
with open(model_conf, "wb") as f:
logging.info("writing a model config file to " + model_conf)
f.write(
json.dumps(
(idim_list[0] if args.num_encs == 1 else idim_list, odim, vars(args)),
indent=4,
ensure_ascii=False,
sort_keys=True,
).encode("utf_8")
)
for key in sorted(vars(args).keys()):
logging.info("ARGS: " + key + ": " + str(vars(args)[key]))
reporter = model.reporter
# check the use of multi-gpu
if args.ngpu > 1:
if args.batch_size != 0:
logging.warning(
"batch size is automatically increased (%d -> %d)"
% (args.batch_size, args.batch_size * args.ngpu)
)
args.batch_size *= args.ngpu
if args.num_encs > 1:
# TODO(ruizhili): implement data parallel for multi-encoder setup.
raise NotImplementedError(
"Data parallel is not supported for multi-encoder setup."
)
# set torch device
device = torch.device("cuda" if args.ngpu > 0 else "cpu")
if args.train_dtype in ("float16", "float32", "float64"):
dtype = getattr(torch, args.train_dtype)
else:
dtype = torch.float32
model = model.to(device=device, dtype=dtype)
if args.freeze_mods:
model, model_params = freeze_modules(model, args.freeze_mods)
else:
model_params = model.parameters()
logging.warning(
"num. model params: {:,} (num. trained: {:,} ({:.1f}%))".format(
sum(p.numel() for p in model.parameters()),
sum(p.numel() for p in model.parameters() if p.requires_grad),
sum(p.numel() for p in model.parameters() if p.requires_grad)
* 100.0
/ sum(p.numel() for p in model.parameters()),
)
)
# Setup an optimizer
if args.opt == "adadelta":
optimizer = torch.optim.Adadelta(
model_params, rho=0.95, eps=args.eps, weight_decay=args.weight_decay
)
elif args.opt == "adam":
optimizer = torch.optim.Adam(model_params, weight_decay=args.weight_decay)
elif args.opt == "noam":
from espnet.nets.pytorch_backend.transformer.optimizer import get_std_opt
# For transformer-transducer, adim declaration is within the block definition.
# Thus, we need retrieve the most dominant value (d_hidden) for Noam scheduler.
if hasattr(args, "enc_block_arch") or hasattr(args, "dec_block_arch"):
adim = model.most_dom_dim
else:
adim = args.adim
optimizer = get_std_opt(
model_params, adim, args.transformer_warmup_steps, args.transformer_lr
)
else:
raise NotImplementedError("unknown optimizer: " + args.opt)
# setup apex.amp
if args.train_dtype in ("O0", "O1", "O2", "O3"):
try:
from apex import amp
except ImportError as e:
logging.error(
f"You need to install apex for --train-dtype {args.train_dtype}. "
"See https://github.com/NVIDIA/apex#linux"
)
raise e
if args.opt == "noam":
model, optimizer.optimizer = amp.initialize(
model, optimizer.optimizer, opt_level=args.train_dtype
)
else:
model, optimizer = amp.initialize(
model, optimizer, opt_level=args.train_dtype
)
use_apex = True
from espnet.nets.pytorch_backend.ctc import CTC
amp.register_float_function(CTC, "loss_fn")
amp.init()
logging.warning("register ctc as float function")
else:
use_apex = False
# FIXME: TOO DIRTY HACK
setattr(optimizer, "target", reporter)
setattr(optimizer, "serialize", lambda s: reporter.serialize(s))
# Setup a converter
if args.num_encs == 1:
converter = CustomConverter(subsampling_factor=model.subsample[0], dtype=dtype)
else:
converter = CustomConverterMulEnc(
[i[0] for i in model.subsample_list], dtype=dtype
)
# read json data
with open(args.train_json, "rb") as f:
train_json = json.load(f)["utts"]
with open(args.valid_json, "rb") as f:
valid_json = json.load(f)["utts"]
use_sortagrad = args.sortagrad == -1 or args.sortagrad > 0
# make minibatch list (variable length)
train = make_batchset(
train_json,
args.batch_size,
args.maxlen_in,
args.maxlen_out,
args.minibatches,
min_batch_size=args.ngpu if args.ngpu > 1 else 1,
shortest_first=use_sortagrad,
count=args.batch_count,
batch_bins=args.batch_bins,
batch_frames_in=args.batch_frames_in,
batch_frames_out=args.batch_frames_out,
batch_frames_inout=args.batch_frames_inout,
iaxis=0,
oaxis=0,
)
valid = make_batchset(
valid_json,
args.batch_size,
args.maxlen_in,
args.maxlen_out,
args.minibatches,
min_batch_size=args.ngpu if args.ngpu > 1 else 1,
count=args.batch_count,
batch_bins=args.batch_bins,
batch_frames_in=args.batch_frames_in,
batch_frames_out=args.batch_frames_out,
batch_frames_inout=args.batch_frames_inout,
iaxis=0,
oaxis=0,
)
load_tr = LoadInputsAndTargets(
mode="asr",
load_output=True,
preprocess_conf=args.preprocess_conf,
preprocess_args={"train": True}, # Switch the mode of preprocessing
)
load_cv = LoadInputsAndTargets(
mode="asr",
load_output=True,
preprocess_conf=args.preprocess_conf,
preprocess_args={"train": False}, # Switch the mode of preprocessing
)
# hack to make batchsize argument as 1
# actual bathsize is included in a list
# default collate function converts numpy array to pytorch tensor
# we used an empty collate function instead which returns list
train_iter = ChainerDataLoader(
dataset=TransformDataset(train, lambda data: converter([load_tr(data)])),
batch_size=1,
num_workers=args.n_iter_processes,
shuffle=not use_sortagrad,
collate_fn=lambda x: x[0],
)
valid_iter = ChainerDataLoader(
dataset=TransformDataset(valid, lambda data: converter([load_cv(data)])),
batch_size=1,
shuffle=False,
collate_fn=lambda x: x[0],
num_workers=args.n_iter_processes,
)
# Set up a trainer
updater = CustomUpdater(
model,
args.grad_clip,
{"main": train_iter},
optimizer,
device,
args.ngpu,
args.grad_noise,
args.accum_grad,
use_apex=use_apex,
)
trainer = training.Trainer(updater, (args.epochs, "epoch"), out=args.outdir)
if use_sortagrad:
trainer.extend(
ShufflingEnabler([train_iter]),
trigger=(args.sortagrad if args.sortagrad != -1 else args.epochs, "epoch"),
)
# Resume from a snapshot
if args.resume:
logging.info("resumed from %s" % args.resume)
torch_resume(args.resume, trainer)
# Evaluate the model with the test dataset for each epoch
if args.save_interval_iters > 0:
trainer.extend(
CustomEvaluator(model, {"main": valid_iter}, reporter, device, args.ngpu),
trigger=(args.save_interval_iters, "iteration"),
)
else:
trainer.extend(
CustomEvaluator(model, {"main": valid_iter}, reporter, device, args.ngpu)
)
# Save attention weight each epoch
is_attn_plot = (
"transformer" in args.model_module
or "conformer" in args.model_module
or mtl_mode in ["att", "mtl", "custom_transducer"]
)
if args.num_save_attention > 0 and is_attn_plot:
data = sorted(
list(valid_json.items())[: args.num_save_attention],
key=lambda x: int(x[1]["input"][0]["shape"][1]),
reverse=True,
)
if hasattr(model, "module"):
att_vis_fn = model.module.calculate_all_attentions
plot_class = model.module.attention_plot_class
else:
att_vis_fn = model.calculate_all_attentions
plot_class = model.attention_plot_class
att_reporter = plot_class(
att_vis_fn,
data,
args.outdir + "/att_ws",
converter=converter,
transform=load_cv,
device=device,
subsampling_factor=total_subsampling_factor,
)
trainer.extend(att_reporter, trigger=(1, "epoch"))
else:
att_reporter = None
# Save CTC prob at each epoch
if mtl_mode in ["ctc", "mtl"] and args.num_save_ctc > 0:
# NOTE: sort it by output lengths
data = sorted(
list(valid_json.items())[: args.num_save_ctc],
key=lambda x: int(x[1]["output"][0]["shape"][0]),
reverse=True,
)
if hasattr(model, "module"):
ctc_vis_fn = model.module.calculate_all_ctc_probs
plot_class = model.module.ctc_plot_class
else:
ctc_vis_fn = model.calculate_all_ctc_probs
plot_class = model.ctc_plot_class
ctc_reporter = plot_class(
ctc_vis_fn,
data,
args.outdir + "/ctc_prob",
converter=converter,
transform=load_cv,
device=device,
subsampling_factor=total_subsampling_factor,
)
trainer.extend(ctc_reporter, trigger=(1, "epoch"))
else:
ctc_reporter = None
# Make a plot for training and validation values
if args.num_encs > 1:
report_keys_loss_ctc = [
"main/loss_ctc{}".format(i + 1) for i in range(model.num_encs)
] + ["validation/main/loss_ctc{}".format(i + 1) for i in range(model.num_encs)]
report_keys_cer_ctc = [
"main/cer_ctc{}".format(i + 1) for i in range(model.num_encs)
] + ["validation/main/cer_ctc{}".format(i + 1) for i in range(model.num_encs)]
if hasattr(model, "is_rnnt"):
trainer.extend(
extensions.PlotReport(
[
"main/loss",
"validation/main/loss",
"main/loss_trans",
"validation/main/loss_trans",
"main/loss_ctc",
"validation/main/loss_ctc",
"main/loss_lm",
"validation/main/loss_lm",
"main/loss_aux_trans",
"validation/main/loss_aux_trans",
"main/loss_aux_symm_kl",
"validation/main/loss_aux_symm_kl",
],
"epoch",
file_name="loss.png",
)
)
else:
trainer.extend(
extensions.PlotReport(
[
"main/loss",
"validation/main/loss",
"main/loss_ctc",
"validation/main/loss_ctc",
"main/loss_att",
"validation/main/loss_att",
]
+ ([] if args.num_encs == 1 else report_keys_loss_ctc),
"epoch",
file_name="loss.png",
)
)
trainer.extend(
extensions.PlotReport(
["main/acc", "validation/main/acc"], "epoch", file_name="acc.png"
)
)
trainer.extend(
extensions.PlotReport(
["main/cer_ctc", "validation/main/cer_ctc"]
+ ([] if args.num_encs == 1 else report_keys_loss_ctc),
"epoch",
file_name="cer.png",
)
)
# Save best models
trainer.extend(
snapshot_object(model, "model.loss.best"),
trigger=training.triggers.MinValueTrigger("validation/main/loss"),
)
if mtl_mode not in ["ctc", "transducer", "custom_transducer"]:
trainer.extend(
snapshot_object(model, "model.acc.best"),
trigger=training.triggers.MaxValueTrigger("validation/main/acc"),
)
# save snapshot which contains model and optimizer states
if args.save_interval_iters > 0:
trainer.extend(
torch_snapshot(filename="snapshot.iter.{.updater.iteration}"),
trigger=(args.save_interval_iters, "iteration"),
)
# save snapshot at every epoch - for model averaging
trainer.extend(torch_snapshot(), trigger=(1, "epoch"))
# epsilon decay in the optimizer
if args.opt == "adadelta":
if args.criterion == "acc" and mtl_mode != "ctc":
trainer.extend(
restore_snapshot(
model, args.outdir + "/model.acc.best", load_fn=torch_load
),
trigger=CompareValueTrigger(
"validation/main/acc",
lambda best_value, current_value: best_value > current_value,
),
)
trainer.extend(
adadelta_eps_decay(args.eps_decay),
trigger=CompareValueTrigger(
"validation/main/acc",
lambda best_value, current_value: best_value > current_value,
),
)
elif args.criterion == "loss":
trainer.extend(
restore_snapshot(
model, args.outdir + "/model.loss.best", load_fn=torch_load
),
trigger=CompareValueTrigger(
"validation/main/loss",
lambda best_value, current_value: best_value < current_value,
),
)
trainer.extend(
adadelta_eps_decay(args.eps_decay),
trigger=CompareValueTrigger(
"validation/main/loss",
lambda best_value, current_value: best_value < current_value,
),
)
# NOTE: In some cases, it may take more than one epoch for the model's loss
# to escape from a local minimum.
# Thus, restore_snapshot extension is not used here.
# see details in https://github.com/espnet/espnet/pull/2171
elif args.criterion == "loss_eps_decay_only":
trainer.extend(
adadelta_eps_decay(args.eps_decay),
trigger=CompareValueTrigger(
"validation/main/loss",
lambda best_value, current_value: best_value < current_value,
),
)
# Write a log of evaluation statistics for each epoch
trainer.extend(
extensions.LogReport(trigger=(args.report_interval_iters, "iteration"))
)
if hasattr(model, "is_rnnt"):
report_keys = [
"epoch",
"iteration",
"main/loss",
"main/loss_trans",
"main/loss_ctc",
"main/loss_lm",
"main/loss_aux_trans",
"main/loss_aux_symm_kl",
"validation/main/loss",
"validation/main/loss_trans",
"validation/main/loss_ctc",
"validation/main/loss_lm",
"validation/main/loss_aux_trans",
"validation/main/loss_aux_symm_kl",
"elapsed_time",
]
else:
report_keys = [
"epoch",
"iteration",
"main/loss",
"main/loss_ctc",
"main/loss_att",
"validation/main/loss",
"validation/main/loss_ctc",
"validation/main/loss_att",
"main/acc",
"validation/main/acc",
"main/cer_ctc",
"validation/main/cer_ctc",
"elapsed_time",
] + ([] if args.num_encs == 1 else report_keys_cer_ctc + report_keys_loss_ctc)
if args.opt == "adadelta":
trainer.extend(
extensions.observe_value(
"eps",
lambda trainer: trainer.updater.get_optimizer("main").param_groups[0][
"eps"
],
),
trigger=(args.report_interval_iters, "iteration"),
)
report_keys.append("eps")
if args.report_cer:
report_keys.append("validation/main/cer")
if args.report_wer:
report_keys.append("validation/main/wer")
trainer.extend(
extensions.PrintReport(report_keys),
trigger=(args.report_interval_iters, "iteration"),
)
trainer.extend(extensions.ProgressBar(update_interval=args.report_interval_iters))
set_early_stop(trainer, args)
if args.tensorboard_dir is not None and args.tensorboard_dir != "":
trainer.extend(
TensorboardLogger(
SummaryWriter(args.tensorboard_dir),
att_reporter=att_reporter,
ctc_reporter=ctc_reporter,
),
trigger=(args.report_interval_iters, "iteration"),
)
# Run the training
trainer.run()
check_early_stop(trainer, args.epochs)
def recog(args):
"""Decode with the given args.
Args:
args (namespace): The program arguments.
"""
set_deterministic_pytorch(args)
model, train_args = load_trained_model(args.model, training=False)
assert isinstance(model, ASRInterface)
model.recog_args = args
if args.streaming_mode and "transformer" in train_args.model_module:
raise NotImplementedError("streaming mode for transformer is not implemented")
logging.info(
" Total parameter of the model = "
+ str(sum(p.numel() for p in model.parameters()))
)
# read rnnlm
if args.rnnlm:
rnnlm_args = get_model_conf(args.rnnlm, args.rnnlm_conf)
if getattr(rnnlm_args, "model_module", "default") != "default":
raise ValueError(
"use '--api v2' option to decode with non-default language model"
)
rnnlm = lm_pytorch.ClassifierWithState(
lm_pytorch.RNNLM(
len(train_args.char_list),
rnnlm_args.layer,
rnnlm_args.unit,
getattr(rnnlm_args, "embed_unit", None), # for backward compatibility
)
)
torch_load(args.rnnlm, rnnlm)
rnnlm.eval()
else:
rnnlm = None
if args.word_rnnlm:
rnnlm_args = get_model_conf(args.word_rnnlm, args.word_rnnlm_conf)
word_dict = rnnlm_args.char_list_dict
char_dict = {x: i for i, x in enumerate(train_args.char_list)}
word_rnnlm = lm_pytorch.ClassifierWithState(
lm_pytorch.RNNLM(
len(word_dict),
rnnlm_args.layer,
rnnlm_args.unit,
getattr(rnnlm_args, "embed_unit", None), # for backward compatibility
)
)
torch_load(args.word_rnnlm, word_rnnlm)
word_rnnlm.eval()
if rnnlm is not None:
rnnlm = lm_pytorch.ClassifierWithState(
extlm_pytorch.MultiLevelLM(
word_rnnlm.predictor, rnnlm.predictor, word_dict, char_dict
)
)
else:
rnnlm = lm_pytorch.ClassifierWithState(
extlm_pytorch.LookAheadWordLM(
word_rnnlm.predictor, word_dict, char_dict
)
)
# gpu
if args.ngpu == 1:
gpu_id = list(range(args.ngpu))
logging.info("gpu id: " + str(gpu_id))
model.cuda()
if rnnlm:
rnnlm.cuda()
# read json data
with open(args.recog_json, "rb") as f:
js = json.load(f)["utts"]
new_js = {}
load_inputs_and_targets = LoadInputsAndTargets(
mode="asr",
load_output=False,
sort_in_input_length=False,
preprocess_conf=train_args.preprocess_conf
if args.preprocess_conf is None
else args.preprocess_conf,
preprocess_args={"train": False},
)
# load transducer beam search
if hasattr(model, "is_rnnt"):
if hasattr(model, "dec"):
trans_decoder = model.dec
else:
trans_decoder = model.decoder
joint_network = model.joint_network
beam_search_transducer = BeamSearchTransducer(
decoder=trans_decoder,
joint_network=joint_network,
beam_size=args.beam_size,
nbest=args.nbest,
lm=rnnlm,
lm_weight=args.lm_weight,
search_type=args.search_type,
max_sym_exp=args.max_sym_exp,
u_max=args.u_max,
nstep=args.nstep,
prefix_alpha=args.prefix_alpha,
score_norm=args.score_norm,
)
if args.batchsize == 0:
with torch.no_grad():
for idx, name in enumerate(js.keys(), 1):
logging.info("(%d/%d) decoding " + name, idx, len(js.keys()))
batch = [(name, js[name])]
feat = load_inputs_and_targets(batch)
feat = (
feat[0][0]
if args.num_encs == 1
else [feat[idx][0] for idx in range(model.num_encs)]
)
if args.streaming_mode == "window" and args.num_encs == 1:
logging.info(
"Using streaming recognizer with window size %d frames",
args.streaming_window,
)
se2e = WindowStreamingE2E(e2e=model, recog_args=args, rnnlm=rnnlm)
for i in range(0, feat.shape[0], args.streaming_window):
logging.info(
"Feeding frames %d - %d", i, i + args.streaming_window
)
se2e.accept_input(feat[i : i + args.streaming_window])
logging.info("Running offline attention decoder")
se2e.decode_with_attention_offline()
logging.info("Offline attention decoder finished")
nbest_hyps = se2e.retrieve_recognition()
elif args.streaming_mode == "segment" and args.num_encs == 1:
logging.info(
"Using streaming recognizer with threshold value %d",
args.streaming_min_blank_dur,
)
nbest_hyps = []
for n in range(args.nbest):
nbest_hyps.append({"yseq": [], "score": 0.0})
se2e = SegmentStreamingE2E(e2e=model, recog_args=args, rnnlm=rnnlm)
r = np.prod(model.subsample)
for i in range(0, feat.shape[0], r):
hyps = se2e.accept_input(feat[i : i + r])
if hyps is not None:
text = "".join(
[
train_args.char_list[int(x)]
for x in hyps[0]["yseq"][1:-1]
if int(x) != -1
]
)
text = text.replace(
"\u2581", " "
).strip() # for SentencePiece
text = text.replace(model.space, " ")
text = text.replace(model.blank, "")
logging.info(text)
for n in range(args.nbest):
nbest_hyps[n]["yseq"].extend(hyps[n]["yseq"])
nbest_hyps[n]["score"] += hyps[n]["score"]
elif hasattr(model, "is_rnnt"):
nbest_hyps = model.recognize(feat, beam_search_transducer)
else:
nbest_hyps = model.recognize(
feat, args, train_args.char_list, rnnlm
)
new_js[name] = add_results_to_json(
js[name], nbest_hyps, train_args.char_list
)
else:
def grouper(n, iterable, fillvalue=None):
kargs = [iter(iterable)] * n
return zip_longest(*kargs, fillvalue=fillvalue)
# sort data if batchsize > 1
keys = list(js.keys())
if args.batchsize > 1:
feat_lens = [js[key]["input"][0]["shape"][0] for key in keys]
sorted_index = sorted(range(len(feat_lens)), key=lambda i: -feat_lens[i])
keys = [keys[i] for i in sorted_index]
with torch.no_grad():
for names in grouper(args.batchsize, keys, None):
names = [name for name in names if name]
batch = [(name, js[name]) for name in names]
feats = (
load_inputs_and_targets(batch)[0]
if args.num_encs == 1
else load_inputs_and_targets(batch)
)
if args.streaming_mode == "window" and args.num_encs == 1:
raise NotImplementedError
elif args.streaming_mode == "segment" and args.num_encs == 1:
if args.batchsize > 1:
raise NotImplementedError
feat = feats[0]
nbest_hyps = []
for n in range(args.nbest):
nbest_hyps.append({"yseq": [], "score": 0.0})
se2e = SegmentStreamingE2E(e2e=model, recog_args=args, rnnlm=rnnlm)
r = np.prod(model.subsample)
for i in range(0, feat.shape[0], r):
hyps = se2e.accept_input(feat[i : i + r])
if hyps is not None:
text = "".join(
[
train_args.char_list[int(x)]
for x in hyps[0]["yseq"][1:-1]
if int(x) != -1
]
)
text = text.replace(
"\u2581", " "
).strip() # for SentencePiece
text = text.replace(model.space, " ")
text = text.replace(model.blank, "")
logging.info(text)
for n in range(args.nbest):
nbest_hyps[n]["yseq"].extend(hyps[n]["yseq"])
nbest_hyps[n]["score"] += hyps[n]["score"]
nbest_hyps = [nbest_hyps]
else:
nbest_hyps = model.recognize_batch(
feats, args, train_args.char_list, rnnlm=rnnlm
)
for i, nbest_hyp in enumerate(nbest_hyps):
name = names[i]
new_js[name] = add_results_to_json(
js[name], nbest_hyp, train_args.char_list
)
with open(args.result_label, "wb") as f:
f.write(
json.dumps(
{"utts": new_js}, indent=4, ensure_ascii=False, sort_keys=True
).encode("utf_8")
)
def enhance(args):
"""Dumping enhanced speech and mask.
Args:
args (namespace): The program arguments.
"""
set_deterministic_pytorch(args)
# read training config
idim, odim, train_args = get_model_conf(args.model, args.model_conf)
# TODO(ruizhili): implement enhance for multi-encoder model
assert args.num_encs == 1, "number of encoder should be 1 ({} is given)".format(
args.num_encs
)
# load trained model parameters
logging.info("reading model parameters from " + args.model)
model_class = dynamic_import(train_args.model_module)
model = model_class(idim, odim, train_args)
assert isinstance(model, ASRInterface)
torch_load(args.model, model)
model.recog_args = args
# gpu
if args.ngpu == 1:
gpu_id = list(range(args.ngpu))
logging.info("gpu id: " + str(gpu_id))
model.cuda()
# read json data
with open(args.recog_json, "rb") as f:
js = json.load(f)["utts"]
load_inputs_and_targets = LoadInputsAndTargets(
mode="asr",
load_output=False,
sort_in_input_length=False,
preprocess_conf=None, # Apply pre_process in outer func
)
if args.batchsize == 0:
args.batchsize = 1
# Creates writers for outputs from the network
if args.enh_wspecifier is not None:
enh_writer = file_writer_helper(args.enh_wspecifier, filetype=args.enh_filetype)
else:
enh_writer = None
# Creates a Transformation instance
preprocess_conf = (
train_args.preprocess_conf
if args.preprocess_conf is None
else args.preprocess_conf
)
if preprocess_conf is not None:
logging.info(f"Use preprocessing: {preprocess_conf}")
transform = Transformation(preprocess_conf)
else:
transform = None
# Creates a IStft instance
istft = None
frame_shift = args.istft_n_shift # Used for plot the spectrogram
if args.apply_istft:
if preprocess_conf is not None:
# Read the conffile and find stft setting
with open(preprocess_conf) as f:
# Json format: e.g.
# {"process": [{"type": "stft",
# "win_length": 400,
# "n_fft": 512, "n_shift": 160,
# "window": "han"},
# {"type": "foo", ...}, ...]}
conf = json.load(f)
assert "process" in conf, conf
# Find stft setting
for p in conf["process"]:
if p["type"] == "stft":
istft = IStft(
win_length=p["win_length"],
n_shift=p["n_shift"],
window=p.get("window", "hann"),
)
logging.info(
"stft is found in {}. "
"Setting istft config from it\n{}".format(
preprocess_conf, istft
)
)
frame_shift = p["n_shift"]
break
if istft is None:
# Set from command line arguments
istft = IStft(
win_length=args.istft_win_length,
n_shift=args.istft_n_shift,
window=args.istft_window,
)
logging.info(
"Setting istft config from the command line args\n{}".format(istft)
)
# sort data
keys = list(js.keys())
feat_lens = [js[key]["input"][0]["shape"][0] for key in keys]
sorted_index = sorted(range(len(feat_lens)), key=lambda i: -feat_lens[i])
keys = [keys[i] for i in sorted_index]
def grouper(n, iterable, fillvalue=None):
kargs = [iter(iterable)] * n
return zip_longest(*kargs, fillvalue=fillvalue)
num_images = 0
if not os.path.exists(args.image_dir):
os.makedirs(args.image_dir)
for names in grouper(args.batchsize, keys, None):
batch = [(name, js[name]) for name in names]
# May be in time region: (Batch, [Time, Channel])
org_feats = load_inputs_and_targets(batch)[0]
if transform is not None:
# May be in time-freq region: : (Batch, [Time, Channel, Freq])
feats = transform(org_feats, train=False)
else:
feats = org_feats
with torch.no_grad():
enhanced, mask, ilens = model.enhance(feats)
for idx, name in enumerate(names):
# Assuming mask, feats : [Batch, Time, Channel. Freq]
# enhanced : [Batch, Time, Freq]
enh = enhanced[idx][: ilens[idx]]
mas = mask[idx][: ilens[idx]]
feat = feats[idx]
# Plot spectrogram
if args.image_dir is not None and num_images < args.num_images:
import matplotlib.pyplot as plt
num_images += 1
ref_ch = 0
plt.figure(figsize=(20, 10))
plt.subplot(4, 1, 1)
plt.title("Mask [ref={}ch]".format(ref_ch))
plot_spectrogram(
plt,
mas[:, ref_ch].T,
fs=args.fs,
mode="linear",
frame_shift=frame_shift,
bottom=False,
labelbottom=False,
)
plt.subplot(4, 1, 2)
plt.title("Noisy speech [ref={}ch]".format(ref_ch))
plot_spectrogram(
plt,
feat[:, ref_ch].T,
fs=args.fs,
mode="db",
frame_shift=frame_shift,
bottom=False,
labelbottom=False,
)
plt.subplot(4, 1, 3)
plt.title("Masked speech [ref={}ch]".format(ref_ch))
plot_spectrogram(
plt,
(feat[:, ref_ch] * mas[:, ref_ch]).T,
frame_shift=frame_shift,
fs=args.fs,
mode="db",
bottom=False,
labelbottom=False,
)
plt.subplot(4, 1, 4)
plt.title("Enhanced speech")
plot_spectrogram(
plt, enh.T, fs=args.fs, mode="db", frame_shift=frame_shift
)
plt.savefig(os.path.join(args.image_dir, name + ".png"))
plt.clf()
# Write enhanced wave files
if enh_writer is not None:
if istft is not None:
enh = istft(enh)
else:
enh = enh
if args.keep_length:
if len(org_feats[idx]) < len(enh):
# Truncate the frames added by stft padding
enh = enh[: len(org_feats[idx])]
elif len(org_feats) > len(enh):
padwidth = [(0, (len(org_feats[idx]) - len(enh)))] + [
(0, 0)
] * (enh.ndim - 1)
enh = np.pad(enh, padwidth, mode="constant")
if args.enh_filetype in ("sound", "sound.hdf5"):
enh_writer[name] = (args.fs, enh)
else:
# Hint: To dump stft_signal, mask or etc,
# enh_filetype='hdf5' might be convenient.
enh_writer[name] = enh
if num_images >= args.num_images and enh_writer is None:
logging.info("Breaking the process.")
break
def ctc_align(args):
"""CTC forced alignments with the given args.
Args:
args (namespace): The program arguments.
"""
def add_alignment_to_json(js, alignment, char_list):
"""Add N-best results to json.
Args:
js (dict[str, Any]): Groundtruth utterance dict.
alignment (list[int]): List of alignment.
char_list (list[str]): List of characters.
Returns:
dict[str, Any]: N-best results added utterance dict.
"""
# copy old json info
new_js = dict()
new_js["ctc_alignment"] = []
alignment_tokens = []
for idx, a in enumerate(alignment):
alignment_tokens.append(char_list[a])
alignment_tokens = " ".join(alignment_tokens)
new_js["ctc_alignment"] = alignment_tokens
return new_js
set_deterministic_pytorch(args)
model, train_args = load_trained_model(args.model)
assert isinstance(model, ASRInterface)
model.eval()
load_inputs_and_targets = LoadInputsAndTargets(
mode="asr",
load_output=True,
sort_in_input_length=False,
preprocess_conf=train_args.preprocess_conf
if args.preprocess_conf is None
else args.preprocess_conf,
preprocess_args={"train": False},
)
if args.ngpu > 1:
raise NotImplementedError("only single GPU decoding is supported")
if args.ngpu == 1:
device = "cuda"
else:
device = "cpu"
dtype = getattr(torch, args.dtype)
logging.info(f"Decoding device={device}, dtype={dtype}")
model.to(device=device, dtype=dtype).eval()
# read json data
with open(args.align_json, "rb") as f:
js = json.load(f)["utts"]
new_js = {}
if args.batchsize == 0:
with torch.no_grad():
for idx, name in enumerate(js.keys(), 1):
logging.info("(%d/%d) aligning " + name, idx, len(js.keys()))
batch = [(name, js[name])]
feat, label = load_inputs_and_targets(batch)
feat = feat[0]
label = label[0]
enc = model.encode(torch.as_tensor(feat).to(device)).unsqueeze(0)
alignment = model.ctc.forced_align(enc, label)
new_js[name] = add_alignment_to_json(
js[name], alignment, train_args.char_list
)
else:
raise NotImplementedError("Align_batch is not implemented.")
with open(args.result_label, "wb") as f:
f.write(
json.dumps(
{"utts": new_js}, indent=4, ensure_ascii=False, sort_keys=True
).encode("utf_8")
)
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