def __init__(self, trainroot, testroot, alpha=0.85):
self.trainroot = trainroot
self.testroot = testroot
# ensure everytime the random is the same
random.seed(cfg.manualSeed)
np.random.seed(cfg.manualSeed)
torch.manual_seed(cfg.manualSeed)
self.logger = self.setLogger()
self.alpha = alpha
self.train_loss = []
self.test_loss = []
self.test_loss_t = []
self.test_loss_c = []
self.acc = {'acc': [], 'acc_t': [], 'acc_c': []}
self.device = torch.device(
"cuda" if cfg.use_cuda and torch.cuda.is_available() else "cpu")
self.model = self.net_init().to(self.device)
if cfg.label_type == "both":
self.codec = dataset.Codec(cfg.alphabet[0])
self.codec_color = dataset.Codec(cfg.alphabet[1])
else:
self.codec = dataset.Codec(cfg.alphabet)
self.loss_fn = nn.CTCLoss() if not cfg.dealwith_lossnan else nn.CTCLoss(zero_infinity=True)
self.loss_fn = self.loss_fn.to(self.device)
if cfg.adam:
self.optim = optim.Adam(self.model.parameters(), lr=cfg.lr,
betas=(cfg.beta1, 0.999))
elif cfg.adadelta:
self.optim = optim.Adadelta(self.model.parameters())
else:
self.optim = optim.RMSprop(self.model.parameters(), lr=cfg.lr)
def __init__(self,
eos,
blank,
enc_n_units,
vocab,
dropout=0.,
lsm_prob=0.,
fc_list=None,
param_init=0.1,
backward=False):
super(CTC, self).__init__()
self.eos = eos
self.blank = blank
self.vocab = vocab
self.lsm_prob = lsm_prob
self.bwd = backward
self.space = -1 # TODO(hirofumi): fix later
# for cache
self.prev_spk = ''
self.lmstate_final = None
# for posterior plot
self.prob_dict = {}
self.data_dict = {}
# Fully-connected layers before the softmax
if fc_list is not None and len(fc_list) > 0:
_fc_list = [int(fc) for fc in fc_list.split('_')]
fc_layers = OrderedDict()
for i in range(len(_fc_list)):
input_dim = enc_n_units if i == 0 else _fc_list[i - 1]
fc_layers['fc' + str(i)] = nn.Linear(input_dim, _fc_list[i])
fc_layers['dropout' + str(i)] = nn.Dropout(p=dropout)
fc_layers['fc' + str(len(_fc_list))] = nn.Linear(
_fc_list[-1], vocab)
self.output = nn.Sequential(fc_layers)
else:
self.output = nn.Linear(enc_n_units, vocab)
self.use_warpctc = LooseVersion(
torch.__version__) < LooseVersion("1.4.0")
if self.use_warpctc:
import warpctc_pytorch
self.ctc_loss = warpctc_pytorch.CTCLoss(size_average=True)
else:
if LooseVersion(torch.__version__) < LooseVersion("1.7.0"):
self.ctc_loss = nn.CTCLoss(reduction="sum")
else:
self.ctc_loss = nn.CTCLoss(reduction="sum", zero_infinity=True)
self.forced_aligner = CTCForcedAligner()
def training_loop(model, kwargs, train_dataset, train_batch_loader, eval_dataset):
device = 'cuda:0' if torch.cuda.is_available() and kwargs['cuda'] else 'cpu'
model.to(device)
greedy_decoder = GreedyDecoder(model.labels)
criterion = nn.CTCLoss(blank=0,reduction='none')
parameters = model.parameters()
optimizer = torch.optim.SGD(parameters,lr=kwargs['lr'],momentum=kwargs['momentum'],nesterov=True,weight_decay=1e-5)
scaling_factor = model.get_scaling_factor()
epochs=kwargs['epochs']
print('Train dataset size:%d' % len(train_dataset))
batch_count = math.ceil(len(train_dataset) / kwargs['batch_size'])
for epoch in range(epochs):
with timing.EpochTimer(epoch,_log_to_tensorboard) as et:
model.train()
total_loss = 0
for idx, data in et.across_epoch('Data Loading time', tqdm.tqdm(enumerate(train_batch_loader),total=batch_count)):
inputs, input_lengths, targets, target_lengths, file_paths, texts = data
with et.timed_action('Model execution time'):
out = model(torch.FloatTensor(inputs).to(device))
out = out.transpose(1,0)
output_lengths = [l // scaling_factor for l in input_lengths]
with et.timed_action('Loss and BP time'):
loss = criterion(out, targets.to(device), torch.IntTensor(output_lengths), torch.IntTensor(target_lengths))
optimizer.zero_grad()
loss.mean().backward()
optimizer.step()
total_loss += loss.mean().item()
log_loss_to_tensorboard(epoch, total_loss / batch_count)
evaluate(model,eval_dataset,greedy_decoder,epoch,kwargs)
if epoch != 0 and epoch % kwargs['epochs_per_save'] == 0 :
save_epoch_model(model,epoch, kwargs['model_dir'])
if kwargs['model_dir']:
save_model(model, kwargs['model_dir']+'/final.pth')
print('Finished at %s' % time.asctime())
def build_output(self, input: Tuple[int, int, int, int], block: str) -> Union[Tuple[None, None, None], Tuple[Tuple[int, int, int, int], str, Callable]]:
"""
Builds an output layer.
"""
pattern = re.compile(r'(O)(?P<name>{\w+})?(?P<dim>2|1|0)(?P<type>l|s|c)(?P<aug>a)?(?P<out>\d+)')
m = pattern.match(block)
if not m:
return None, None, None
dim = int(m.group('dim'))
nl = m.group('type')
outdim = int(m.group('out'))
if dim == 0:
raise ValueError('categorical output not supported, yet.')
if nl == 'c' and dim == 2:
raise ValueError('CTC not supported for heatmap output')
if nl in ['l', 's'] and int(m.group('out')) >= 1:
self.criterion = nn.BCELoss()
elif nl == 'c':
self.criterion = nn.CTCLoss(reduction='sum', zero_infinity=True)
else:
raise ValueError('unsupported output specification')
# heatmap output
if dim == 2:
act = 's' if nl == 'l' else 'm'
fn = layers.ActConv2D(input[1], outdim, (1, 1), (1, 1), act)
logger.debug('{}\t\tconv\tkernel 1 x 1 filters {} stride 1 activation {}'.format(self.idx+1, outdim, nl))
return fn.get_shape(input), self.get_layer_name(m.group('type'), m.group('name')), fn
else:
aug = True if m.group('aug') else False
lin = layers.LinSoftmax(input[1], int(m.group('out')), aug)
logger.debug('{}\t\tlinear\taugmented {} out {}'.format(self.idx+1, aug, m.group('out')))
return lin.get_shape(input), self.get_layer_name(m.group(1), m.group('name')), lin
def __init__(
self,
pad_id=0,
smoothing_coef=0.0,
sample_wise=False,
aux_ctc=False,
ctc_initial_coef=0.1,
ctc_blank_id=None,
eps=1e-5,
):
assert (not aux_ctc) or (
ctc_blank_id is not None), "Should be a blank id if using CTC loss"
super().__init__()
self.pad_id = pad_id
self.smoothing_coef = smoothing_coef
self.sample_wise = sample_wise
self.aux_ctc = aux_ctc
self.ctc_coef = ctc_initial_coef
self.eps = eps
if aux_ctc:
self.ctc = nn.CTCLoss(blank=ctc_blank_id,
reduction='none',
zero_infinity=True)
self.ctc = self.ctc.to(self._device)
def main(learning_rate=5e-4, batch_size=20, epochs=10,
train_url="train-clean-100", test_url="test-clean",
experiment=Experiment(api_key='dummy_key', disabled=True)):
hparams = {
"n_cnn_layers": 3,
"n_rnn_layers": 5,
"rnn_dim": 512,
"n_class": 29,
"n_feats": 128,
"stride":2,
"dropout": 0.1,
"learning_rate": learning_rate,
"batch_size": batch_size,
"epochs": epochs
}
experiment.log_parameters(hparams)
use_cuda = torch.cuda.is_available()
torch.manual_seed(7)
device = torch.device("cuda" if use_cuda else "cpu")
if not os.path.isdir("./data"):
os.makedirs("./data")
train_dataset = torchaudio.datasets.LIBRISPEECH("./data", url=train_url, download=True)
test_dataset = torchaudio.datasets.LIBRISPEECH("./data", url=test_url, download=True)
kwargs = {'num_workers': 1, 'pin_memory': True} if use_cuda else {}
train_loader = data.DataLoader(dataset=train_dataset,
batch_size=hparams['batch_size'],
shuffle=True,
collate_fn=lambda x: data_processing(x, 'train'),
**kwargs)
test_loader = data.DataLoader(dataset=test_dataset,
batch_size=hparams['batch_size'],
shuffle=False,
collate_fn=lambda x: data_processing(x, 'valid'),
**kwargs)
model = SpeechRecognitionModel(
hparams['n_cnn_layers'], hparams['n_rnn_layers'], hparams['rnn_dim'],
hparams['n_class'], hparams['n_feats'], hparams['stride'], hparams['dropout']
).to(device)
print(model)
print('Num Model Parameters', sum([param.nelement() for param in model.parameters()]))
optimizer = optim.AdamW(model.parameters(), hparams['learning_rate'])
criterion = nn.CTCLoss(blank=28).to(device)
scheduler = optim.lr_scheduler.OneCycleLR(optimizer, max_lr=hparams['learning_rate'],
steps_per_epoch=int(len(train_loader)),
epochs=hparams['epochs'],
anneal_strategy='linear')
iter_meter = IterMeter()
for epoch in range(1, epochs + 1):
train(model, device, train_loader, criterion, optimizer, scheduler, epoch, iter_meter, experiment)
test(model, device, test_loader, criterion, epoch, iter_meter, experiment)
def __init__(self, upstream_dim, upstream_rate, downstream_expert, expdir,
**kwargs):
super(DownstreamExpert, self).__init__()
self.expdir = expdir
self.upstream_dim = upstream_dim
self.corpus = downstream_expert["corpus"]
# Text tokenizer
self.tokenizer = load_text_encoder(**downstream_expert["text"])
modelrc = downstream_expert["model"]
self.projector = nn.Linear(upstream_dim, modelrc["project_dim"])
model_select = downstream_expert["model"]["select"]
self.model = eval(model_select)(
modelrc["project_dim"],
self.tokenizer.vocab_size,
upstream_rate=upstream_rate,
**modelrc.get(model_select, {}),
)
self.objective = nn.CTCLoss(
blank=self.tokenizer.pad_idx,
zero_infinity=modelrc["zero_infinity"],
)
self.save_best_on = downstream_expert.get("save_best_on", "dev")
self.metrics = downstream_expert["metric"]
self.metric_higher_better = downstream_expert["metric_higher_better"]
self.register_buffer(
"best_score",
torch.ones(1) * (0 if self.metric_higher_better else 1 << 31))
def get_objective(objective):
if isinstance(objective, str):
objective = objective.lower()
if objective in ['l1', 'l1loss']:
return nn.L1Loss()
elif objective in ['nll', 'nllloss']:
return nn.NLLLoss()
elif objective in ['nll2d', 'nllloss2d']:
return nn.NLLLoss2d()
elif objective in ['poissonnll', 'poissonnllloss']:
return nn.PoissonNLLLoss()
elif objective in ['kldiv', 'kldivloss']:
return nn.KLDivLoss()
elif objective in ['mse', 'mseloss']:
return nn.MSELoss()
elif objective in ['bce', 'bceloss']:
return nn.BCELoss()
elif objective in ['smoothl1', 'smoothl1loss']:
return nn.SmoothL1Loss()
elif objective in ['crossentropy', 'cross_entropy']:
return nn.CrossEntropyLoss()
elif objective in ['ctc', 'ctcloss']:
return nn.CTCLoss()
else:
raise ValueError('unknown argument!')
elif isinstance(objective, _Loss):
return objective
else:
raise ValueError('unknown argument {}'.format(objective))
def __init__(self, file_path, epochs, batch_size=4):
self.temppath = file_path.split(".")
self.logpath = self.temppath[0] + "log.txt"
print("Cuda : " + str(torch.cuda.is_available()))
self.device = torch.device(
'cuda:0' if torch.cuda.is_available() else 'cpu') #set cpu or gpu
self.file_path = file_path
self.net = model.SpeechRecognition()
self.criterion = nn.CTCLoss(blank=28).to(self.device)
if torch.cuda.is_available():
self.net.cuda()
else:
self.net.cpu()
if file_path is not None and path.exists(file_path):
self.load()
self.net.to(self.device)
#set training waveform data transformer
self.train_audio_transforms = nn.Sequential(
torchaudio.transforms.MelSpectrogram(sample_rate=16000,
n_mels=128),
torchaudio.transforms.FrequencyMasking(freq_mask_param=30),
torchaudio.transforms.TimeMasking(time_mask_param=100))
#set testing waveform data transformer
self.valid_audio_transforms = torchaudio.transforms.MelSpectrogram()
#train
self.train(epochs=epochs, batch_size=batch_size)
def __init__(self, blank=0, reduction='mean', use_baidu=False):
super(CTCLoss, self).__init__()
self.use_baidu_implement = use_baidu
if self.use_baidu_implement:
self.internal_loss = internalCTC(reduction=reduction, blank=blank)
else:
self.internal_loss = nn.CTCLoss(blank=blank, reduction=reduction)
def forward(self, images, targets=None):
bs, _, _, _ = images.size()
#print(images.shape)
x = F.relu(self.conv1(images))
#print(x.shape)
x = self.maxpool1(x)
#print(x.shape)
x = F.relu(self.conv2(x))
#print(x.shape)
x = self.maxpool2(x)
#print(x.shape)
x = x.permute(0, 3, 1, 2)
#print(x.shape)
x = x.view(bs, x.size(1), -1)
#print(x.shape)
x = F.relu(self.linear1(x))
#print(x.shape)
x = self.dropout1(x)
x, _ = self.gru1(x) # 1, 75, 64
x = self.output(x) # 1, 75, 20
x = x.permute(1, 0, 2) # 75, 1, 20
if targets is not None:
log_softmax_values = F.log_softmax(x, 2)
input_lengths = torch.full(
size = (bs,), fill_value=log_softmax_values.size(0), dtype=torch.int32
)
target_lengths = torch.full(
size=(bs,), fill_value=targets.size(1), dtype=torch.int32
)
loss = nn.CTCLoss(blank=0)(log_softmax_values, targets, input_lengths, target_lengths)
return x, loss
return x, None
def __init__(self, num_features, num_classes, base_config, blank_index=0):
super(Wav2LetterPlus, self).__init__()
self.layers = nn.ModuleList ([
Wav2LetterPlusSubBlock(num_features, 256, 11, 2, 1, 0.2, 1),
Wav2LetterPlusSubBlock(256, 256, 11, 1, 1, 0.2, 3),
Wav2LetterPlusSubBlock(256, 384, 13, 1, 1, 0.2, 3),
Wav2LetterPlusSubBlock(384, 512, 17, 1, 1, 0.2, 3),
Wav2LetterPlusSubBlock(512, 640, 21, 1, 1, 0.3, 3),
Wav2LetterPlusSubBlock(640, 768, 25, 1, 1, 0.3, 3),
Wav2LetterPlusSubBlock(768, 896, 29, 1, 2, 0.4, 1),
Wav2LetterPlusSubBlock(896, 1024, 1, 1, 1, 0.4, 1),
])
self.output_layers = nn.ModuleList([
Wav2LetterPlusSubBlock(1024, num_classes, 1, 1, 1, activation=False, batch_norm=False)
for _ in range(1+n_left_context_heads+n_right_context_heads)
])
self.n_left_context_heads = n_left_context_heads
self.n_right_context_heads = n_right_context_heads
self.ctc_criterion = nn.CTCLoss(blank=blank_index, reduction='mean', zero_infinity=True)
self.ct_criterion = ct_loss.CTLoss(blank_index=blank_index, version='numpy')
##### hyper parameters #####
ctc_loss_weight = base_config.get('ctc_loss_weight', 1)
ct_loss_left_weight = base_config.get('ct_loss_left_weight', 0)
ct_loss_right_weight = base_config.get('ct_loss_right_weight', 0)
n_left_context_heads = len(ct_loss_left_weight)
n_right_context_heads = len(ct_loss_right_weight)
eval_ct_steps = base_config.get('eval_steps') * base_config.get('eval_ct_steps', 0)
def _get_ctc_loss(output, trg, device):
ctc_batch_size = output.shape[1]
ctc_input_length = output.shape[0]
ctc_inputs = output.log_softmax(2)
ctc_trgs = trg.permute((1, 0))
ctc_input_lengths = torch.full(size=(ctc_batch_size, ),
fill_value=ctc_input_length,
dtype=torch.long)
# TODO figure this part out better..
#ctc_trg_lengths = torch.full(size=(ctc_batch_size,), fill_value=ctc_input_length, dtype=torch.long)
ctc_trg_list = []
for i in range(ctc_batch_size):
nz = (ctc_trgs[i, :] == 0).nonzero()
if len(nz) == 0 or nz[0] > ctc_input_length / 2:
ctc_trg_list.append(
torch.tensor([int(ctc_input_length / 2)]).to(device))
#ctc_trg_list.append(ctc_input_lengths[0:1].to(device))
else:
ctc_trg_list.append(nz[0].detach())
try:
ctc_trg_lengths = torch.cat(ctc_trg_list).to(device)
except:
import pdb
pdb.set_trace()
loss_ctc = nn.CTCLoss()(ctc_inputs, ctc_trgs, ctc_input_lengths,
ctc_trg_lengths)
loss = loss_ctc
if torch.isinf(loss):
import pdb
pdb.set_trace()
return loss
def __init__(
self,
num_classes: int,
ignore_index: int,
dim: int = -1,
reduction='mean',
ctc_weight: float = 0.3,
cross_entropy_weight: float = 0.7,
blank_id: int = None,
smoothing: float = 0.1,
) -> None:
super(JointCTCCrossEntropyLoss, self).__init__()
self.num_classes = num_classes
self.dim = dim
self.ignore_index = ignore_index
self.reduction = reduction.lower()
self.ctc_weight = ctc_weight
self.cross_entropy_weight = cross_entropy_weight
self.ctc_loss = nn.CTCLoss(blank=blank_id,
reduction=self.reduction,
zero_infinity=True)
if smoothing > 0.0:
self.cross_entropy_loss = LabelSmoothedCrossEntropyLoss(
num_classes=num_classes,
ignore_index=ignore_index,
smoothing=smoothing,
reduction=reduction,
dim=-1,
)
else:
self.cross_entropy_loss = nn.CrossEntropyLoss(
reduction=self.reduction, ignore_index=self.ignore_index)
def __init__(self, net_class, net_cfg, train_cfg):
super().__init__()
self.net_cfg = net_cfg
self.train_cfg = train_cfg
self.loss_fn = nn.CTCLoss(blank=0, zero_infinity=False)
self.model = net_class(**net_cfg)
def train(model, device):
ctc_loss = nn.CTCLoss()
model.train()
optimizer = opt.SGD(model.parameters(), lr=learning_rate, weight_decay=1e-5)
global batch_size
for e in range(num_of_epochs):
loss_sum = 0
for item, label, real_size, indices in train_loader:
optimizer.zero_grad()
item = item.to(device)
probes = model(item, device)
length = probes.size()[0]
targets = indices.to(device)
input_lengths = torch.full(size=(batch_size,), fill_value=length, dtype=torch.long).to(device)
target_lengths = real_size.to(device)
loss = ctc_loss(probes, targets, input_lengths, target_lengths)
loss_sum += loss.item()
loss.backward()
optimizer.step()
print("finish epoch #{} avg loss {} last loss {}".format(e, (loss_sum / len(train_loader)), loss))
def build_output(
self, input: Tuple[int, int, int, int], block: str
) -> Union[Tuple[None, None, None], Tuple[Tuple[int, int, int, int], str,
Callable]]:
"""
Builds an output layer.
"""
pattern = re.compile(
r'(O)(?P<name>{\w+})?(?P<dim>2|1|0)(?P<type>l|s|c)(?P<aug>a)?(?P<out>\d+)'
)
m = pattern.match(block)
if not m:
return None, None, None
if int(m.group('dim')) != 1:
raise ValueError('non-2d output not supported, yet')
nl = m.group('type')
if nl not in ['s', 'c']:
raise ValueError('only softmax and ctc supported in output')
if nl == 'c':
self.criterion = nn.CTCLoss(reduction='none')
aug = True if m.group('aug') else False
lin = layers.LinSoftmax(input[1], int(m.group('out')), aug)
logger.debug('{}\t\tlinear\taugmented {} out {}'.format(
self.idx + 1, aug, m.group('out')))
return lin.get_shape(input), self.get_layer_name(
m.group(1), m.group('name')), lin
def __init__(self, config):
super().__init__()
self.save_hyperparameters('config')
self.hparams = config
self.transform = ImageTransform(
augmentation=config.get('augmentation', True),
scale_height=config['dataset']['scale_height'],
min_width=config['dataset']['min_width'])
self.config = config
self.beam_width = config['beam_width']
# define model
self.cnn = initialize(config['cnn'])
self.vocab = initialize(config['vocab'], add_blank=True)
self.loss_fn = nn.CTCLoss(blank=self.vocab.BLANK_IDX)
output_H = config['dataset']['scale_height'] // (
32 // 2**config['cnn']['args']['droplast'])
self.blstm = nn.LSTM(input_size=output_H * self.cnn.n_features,
hidden_size=config['hidden_size'],
num_layers=config['num_layers'],
batch_first=True,
dropout=config['dropout'],
bidirectional=True)
self.character_distribution = nn.Linear(2 * config['hidden_size'],
self.vocab.size)
self.ctc_string_tf = CTCStringTransform(self.vocab)
self.string_tf = StringTransform(self.vocab)
def forward(self, images, targets=None):
bs, _, _, _ = images.size()
x = F.relu(self.conv_1(images))
x = self.pool_1(x)
x = F.relu(self.conv_2(x))
x = self.pool_2(x)
x = x.permute(0, 3, 1, 2)
x = x.view(bs, x.size(1), -1)
x = F.relu(self.linear_1(x))
x = self.drop_1(x)
x, _ = self.lstm(x)
x = self.output(x)
x = x.permute(1, 0, 2)
if targets is not None:
log_probs = F.log_softmax(x, 2)
input_lengths = torch.full(size=(bs, ),
fill_value=log_probs.size(0),
dtype=torch.int32)
target_lengths = torch.full(size=(bs, ),
fill_value=targets.size(1),
dtype=torch.int32)
loss = nn.CTCLoss(blank=0)(log_probs, targets, input_lengths,
target_lengths)
return x, loss
return x, None
def __init__(self, input_len, target_len, blank=0):
super(CTC, self).__init__()
self.ctc = nn.CTCLoss(blank=blank,
reduction='mean',
zero_infinity=True)
self.input_len = input_len
self.target_len = target_len
def __init__(
self,
num_classes: int, # the number of classfication
ignore_index: int, # indexes that are ignored when calcuating loss
dim: int = -1, # dimension of caculation loss
reduction='mean', # reduction method [sum, mean]
ctc_weight: float = 0.3, # weight of ctc loss
cross_entropy_weight: float = 0.7, # weight of cross entropy loss
blank_id: int = None) -> None:
super(JointCTCCrossEntropyLoss, self).__init__()
self.num_classes = num_classes
self.dim = dim
self.ignore_index = ignore_index
self.reduction = reduction.lower()
self.ctc_weight = ctc_weight
self.cross_entropy_weight = cross_entropy_weight
if self.reduction == 'sum':
self.reduction_method = torch.sum
elif self.reduction == 'mean':
self.reduction_method = torch.mean
else:
raise ValueError(
"Unsupported reduction method {0}".format(reduction))
self.ctc_loss = nn.CTCLoss(blank=blank_id,
reduction=self.reduction,
zero_infinity=True)
self.cross_entropy_loss = nn.CrossEntropyLoss(
reduction=self.reduction, ignore_index=self.ignore_index)
def train_epoch_packed(model, optimizer, train_loader):
model.train()
criterion = nn.CTCLoss()
criterion = criterion.to(DEVICE)
batch_id=0
avg_loss = 0
before = time.time()
print("Training", len(train_loader), "number of batches")
print("Current running lr is: ",optimizer.param_groups[0]['lr'])
for inputs, input_lens,targets, target_lens in train_loader: # lists, presorted, preloaded on GPU
batch_id+=1
inputs, input_lens, targets, target_lens = inputs.to(DEVICE), input_lens.to(DEVICE),targets.to(DEVICE), target_lens.to(DEVICE)
out, out_lens = model(inputs, input_lens)
# print(target_lens)
loss = criterion(out, targets, out_lens, target_lens) # criterion of the concatenated output
optimizer.zero_grad()
loss.backward()
optimizer.step()
avg_loss += loss.item()
if batch_id % 100 == 0:
after = time.time()
# nwords = np.sum(np.array([len(l) for l in inputs]))
# lpw = loss.item() / nwords
print("Time elapsed: ", after - before)
print("At batch",batch_id,'Loss', avg_loss/(100))
avg_loss = 0
before = after
del inputs
del input_lens
del targets
del target_lens
del out
del out_lens
return model
def main(args):
alphabet = alphabet_factory()
device = torch.device('cpu')
checkpoint = torch.load('model_best.pth', map_location=device)
in_features = args.n_mfcc * (2 * args.n_context + 1)
model = build_deepspeech(in_features=in_features,
num_classes=len(alphabet))
model.load_state_dict(checkpoint['state_dict'])
print_size_of_model(model)
decoder = GreedyDecoder()
if args.quantize:
model = torch.quantization.quantize_dynamic(model, {nn.RNN, nn.Linear},
dtype=torch.qint8)
logging.info('quantized model')
print_size_of_model(model)
transform = prepare_transformations(args)
dataset = ProcessedDataset(get_dataset(args.datadir, "dev-clean"),
transform, alphabet)
collate_fn = collate_factory(model_length_function)
criterion = nn.CTCLoss(blank=alphabet.mapping[alphabet.char_blank])
dataloader = torch.utils.data.DataLoader(dataset,
batch_size=args.batch_size,
shuffle=False,
num_workers=0,
collate_fn=collate_fn,
drop_last=False)
test_loop_fn(dataloader, model, criterion, device, 1, decoder, alphabet)
def get_criterion(opt, vocab):
if opt.architecture == 'deepspeech2':
criterion = nn.CTCLoss(blank=vocab.blank_id, reduction=opt.reduction, zero_infinity=True)
elif opt.architecture == 'las' and opt.joint_ctc_attention:
criterion = JointCTCCrossEntropyLoss(
num_classes=len(vocab),
ignore_index=vocab.pad_id,
reduction=opt.reduction,
ctc_weight=opt.ctc_weight,
cross_entropy_weight=opt.cross_entropy_weight,
blank_id=vocab.blank_id,
dim=-1,
)
elif opt.architecture == 'transformer':
criterion = nn.CrossEntropyLoss(
ignore_index=vocab.pad_id,
reduction=opt.reduction
)
else:
criterion = LabelSmoothedCrossEntropyLoss(
num_classes=len(vocab),
ignore_index=vocab.pad_id,
smoothing=opt.label_smoothing,
reduction=opt.reduction,
architecture=opt.architecture,
dim=-1
)
return criterion
def forward(self, images, labels, lengths):
r"""
Overridden.
"""
images = images.to(self.device)
labels = labels.to(self.device)
T_length = 18
input_lengths, target_lengths = BIM.sparse_tuple_for_ctc(T_length, lengths)
ctc_loss = nn.CTCLoss(blank=len(CHARS)-1, reduction='mean') # reduction: 'none' | 'mean' | 'sum'
for i in range(self.iters) :
images.requires_grad = True
outputs = self.model(images)
log_probs = outputs.permute(2, 0, 1) # for ctc loss: T x N x C, llog_probs.shape = (18, 100, 68)
log_probs = log_probs.log_softmax(2).requires_grad_()
cost = ctc_loss(log_probs, labels, input_lengths=input_lengths, target_lengths=target_lengths)
grad = torch.autograd.grad(cost, images,
retain_graph=False, create_graph=False)[0]
adv_images = images + self.alpha*grad.sign()
a = torch.clamp(images - self.eps, min=-1, max=1)
b = (adv_images>=a).float()*adv_images + (a>adv_images).float()*a
c = (b > images+self.eps).float()*(images+self.eps) + (images+self.eps >= b).float()*b
images = torch.clamp(c, max=1).detach()
adv_images = images
return adv_images
def __init__(self, hparams: Namespace):
super().__init__()
self.hparams = hparams
self.criterion = nn.CTCLoss()
if Path(self.hparams.tokenizer_path).exists():
self.tokenizer = WordLevelTokenizer(self.hparams.tokenizer_path)
else:
train_turns = preprocess(self.hparams.train_path,
self.hparams.ontology_path)
self.tokenizer = get_tokenizer(train_turns,
self.hparams.tokenizer_path)
# embedding
self.embedding = nn.Embedding(self.tokenizer.get_vocab_size(),
self.hparams.embedding_dim)
self.pos_embedding = PositionalEncoding(
d_model=self.hparams.embedding_dim, dropout=self.hparams.dropout)
# value decoder
self.value_decoder = nn.ModuleList([
nn.MultiheadAttention(embed_dim=self.hparams.hidden_dim,
num_heads=self.hparams.num_heads,
dropout=self.hparams.dropout)
for _ in range(3)
])
self.vocab_proj = nn.Linear(self.hparams.hidden_dim,
self.tokenizer.get_vocab_size())
def __init__(
self,
num_classes: int, # the number of classfication
ignore_index: int, # indexes that are ignored when calcuating loss
dim: int = -1, # dimension of caculation loss
reduction='mean', # reduction method [sum, mean]
ctc_weight: float = 0.3, # weight of ctc loss
cross_entropy_weight: float = 0.7, # weight of cross entropy loss
blank_id: int = 0, # identification of blank token
smoothing:
float = 0.1, # ratio of smoothing (confidence = 1.0 - smoothing)
) -> None:
super(JointCTCCrossEntropyLoss, self).__init__()
self.num_classes = num_classes
self.dim = dim
self.ignore_index = ignore_index
self.reduction = reduction.lower()
self.ctc_weight = ctc_weight
self.cross_entropy_weight = cross_entropy_weight
self.ctc_loss = nn.CTCLoss(blank=blank_id,
reduction=self.reduction,
zero_infinity=True)
if smoothing > 0.0:
self.cross_entropy_loss = LabelSmoothedCrossEntropyLoss(
num_classes=num_classes,
ignore_index=ignore_index,
smoothing=smoothing,
reduction=reduction,
dim=-1,
)
else:
self.cross_entropy_loss = nn.CrossEntropyLoss(
reduction=self.reduction, ignore_index=self.ignore_index)
def get_criterion(config: DictConfig, vocab: Vocabulary) -> nn.Module:
if config.model.architecture in ('deepspeech2', 'jasper'):
criterion = nn.CTCLoss(blank=vocab.blank_id,
reduction=config.train.reduction,
zero_infinity=True)
elif config.model.architecture in (
'las', 'transformer') and config.model.joint_ctc_attention:
criterion = JointCTCCrossEntropyLoss(
num_classes=len(vocab),
ignore_index=vocab.pad_id,
reduction=config.train.reduction,
ctc_weight=config.model.ctc_weight,
cross_entropy_weight=config.model.cross_entropy_weight,
blank_id=vocab.blank_id,
dim=-1,
smoothing=config.train.label_smoothing,
)
elif config.model.architecture in ('rnnt', 'conformer'):
criterion = TransducerLoss(blank_id=vocab.blank_id)
elif config.model.architecture == 'transformer' and config.train.label_smoothing <= 0.0:
criterion = nn.CrossEntropyLoss(
ignore_index=vocab.pad_id,
reduction=config.train.reduction,
)
else:
criterion = LabelSmoothedCrossEntropyLoss(
num_classes=len(vocab),
ignore_index=vocab.pad_id,
smoothing=config.train.label_smoothing,
reduction=config.train.reduction,
dim=-1,
)
return criterion
def __init__(self, vocab_size, decoder_dim, hidden_size, dropout=0.5):
super(MIEsitmator, self).__init__()
self.proj = nn.Sequential(
LinearNorm(decoder_dim, hidden_size, bias=True,
w_init_gain='relu'), nn.ReLU(), nn.Dropout(p=dropout))
self.ctc_proj = LinearNorm(hidden_size, vocab_size + 1, bias=True)
self.ctc = nn.CTCLoss(blank=vocab_size, reduction='none')
def __init__(self, upstream_dim, upstream_rate, runner, downstream_expert,
expdir, **kwargs):
super(DownstreamExpert, self).__init__()
self.expdir = expdir
self.upstream_dim = upstream_dim
self.corpus = downstream_expert['corpus']
# Text tokenizer
self.tokenizer = load_text_encoder(**downstream_expert['text'])
modelrc = downstream_expert['model']
self.projector = nn.Linear(upstream_dim, modelrc['project_dim'])
model_select = downstream_expert['model']['select']
self.model = eval(model_select)(
modelrc['project_dim'],
self.tokenizer.vocab_size,
upstream_rate=upstream_rate,
**modelrc.get(model_select, {}),
)
self.objective = nn.CTCLoss(
blank=self.tokenizer.pad_idx,
zero_infinity=modelrc['zero_infinity'],
)
self.eval_dataloaders = runner['eval_dataloaders']
self.metrics = downstream_expert['metric']
self.metric_higher_better = downstream_expert['metric_higher_better']
self.register_buffer(
'best_score',
torch.ones(1) * (0 if self.metric_higher_better else 1 << 31))
