add u2 bins

.pre-commit-config.yaml

@@ -14,7 +14,17 @@
         files: \.md$
     -   id: trailing-whitespace
         files: \.md$
--   repo: https://github.com/Lucas-C/pre-commit-hooks
+    -   id: requirements-txt-fixer
+    -   id: check-yaml
+    -   id: check-json
+    -   id: pretty-format-json
+    -   id: check-merge-conflict
+    -   id: flake8
+        aergs:
+        -  --ignore=E501,E228,E226,E261,E266,E128,E402,W503
+        -  --builtins=G,request
+        -  --jobs=1
+-   repo : https://github.com/Lucas-C/pre-commit-hooks
     sha: v1.0.1
     hooks:
     -   id: forbid-crlf

deepspeech/exps/u2/__init__.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

deepspeech/exps/u2/bin/export.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Export for U2 model."""
+
+import io
+import logging
+import argparse
+import functools
+
+from paddle import distributed as dist
+
+from deepspeech.training.cli import default_argument_parser
+from deepspeech.utils.utility import print_arguments
+from deepspeech.utils.error_rate import char_errors, word_errors
+
+from deepspeech.exps.u2.config import get_cfg_defaults
+from deepspeech.exps.u2.model import U2Tester as Tester
+
+
+def main_sp(config, args):
+    exp = Tester(config, args)
+    exp.setup()
+    exp.run_export()
+
+
+def main(config, args):
+    main_sp(config, args)
+
+
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    args = parser.parse_args()
+    print_arguments(args)
+
+    # https://yaml.org/type/float.html
+    config = get_cfg_defaults()
+    if args.config:
+        config.merge_from_file(args.config)
+    if args.opts:
+        config.merge_from_list(args.opts)
+    config.freeze()
+    print(config)
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
+
+    main(config, args)

deepspeech/exps/u2/bin/test.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Evaluation for U2 model."""
+
+import io
+import logging
+import argparse
+import functools
+
+from paddle import distributed as dist
+
+from deepspeech.training.cli import default_argument_parser
+from deepspeech.utils.utility import print_arguments
+from deepspeech.utils.error_rate import char_errors, word_errors
+
+# TODO(hui zhang): dynamic load 
+from deepspeech.exps.u2.config import get_cfg_defaults
+from deepspeech.exps.u2.model import U2Tester as Tester
+
+
+def main_sp(config, args):
+    exp = Tester(config, args)
+    exp.setup()
+    exp.run_test()
+
+
+def main(config, args):
+    main_sp(config, args)
+
+
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    args = parser.parse_args()
+    print_arguments(args)
+
+    # https://yaml.org/type/float.html
+    config = get_cfg_defaults()
+    if args.config:
+        config.merge_from_file(args.config)
+    if args.opts:
+        config.merge_from_list(args.opts)
+    config.freeze()
+    print(config)
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
+
+    main(config, args)

deepspeech/exps/u2/bin/train.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Trainer for U2 model."""
+
+import io
+import logging
+import argparse
+import functools
+
+from paddle import distributed as dist
+
+from deepspeech.utils.utility import print_arguments
+from deepspeech.training.cli import default_argument_parser
+
+from deepspeech.exps.u2.config import get_cfg_defaults
+from deepspeech.exps.u2.model import U2Trainer as Trainer
+
+
+def main_sp(config, args):
+    exp = Trainer(config, args)
+    exp.setup()
+    exp.run()
+
+
+def main(config, args):
+    if args.device == "gpu" and args.nprocs > 1:
+        dist.spawn(main_sp, args=(config, args), nprocs=args.nprocs)
+    else:
+        main_sp(config, args)
+
+
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    args = parser.parse_args()
+    print_arguments(args)
+
+    # https://yaml.org/type/float.html
+    config = get_cfg_defaults()
+    if args.config:
+        config.merge_from_file(args.config)
+    if args.opts:
+        config.merge_from_list(args.opts)
+    config.freeze()
+    print(config)
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
+
+    main(config, args)

deepspeech/exps/u2/config.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from yacs.config import CfgNode
+
+from deepspeech.models.u2 import U2Model
+from deepspeech.exps.u2.model import U2Trainer
+from deepspeech.exps.u2.model import U2Tester
+
+_C = CfgNode()
+
+_C.data = CfgNode()
+ManifestDataset.params(_C.data)
+
+_C.model = CfgNode()
+U2Model.params(_C.model)
+
+_C.training = CfgNode()
+U2Trainer.params(_C.training)
+
+_C.decoding = CfgNode()
+U2Tester.params(_C.training)
+
+
+def get_cfg_defaults():
+    """Get a yacs CfgNode object with default values for my_project."""
+    # Return a clone so that the defaults will not be altered
+    # This is for the "local variable" use pattern
+    return _C.clone()

deepspeech/exps/u2/model.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Contains U2 model."""
+
+import io
+import sys
+import os
+import time
+import logging
+import numpy as np
+from collections import defaultdict
+from functools import partial
+from pathlib import Path
+
+import paddle
+from paddle import distributed as dist
+from paddle.io import DataLoader
+
+from deepspeech.training import Trainer
+from deepspeech.training.gradclip import ClipGradByGlobalNormWithLog
+from deepspeech.training.scheduler import WarmupLR
+
+from deepspeech.utils import mp_tools
+from deepspeech.utils import layer_tools
+from deepspeech.utils import error_rate
+
+from deepspeech.io.collator import SpeechCollator
+from deepspeech.io.sampler import SortagradDistributedBatchSampler
+from deepspeech.io.sampler import SortagradBatchSampler
+from deepspeech.io.dataset import ManifestDataset
+
+from deepspeech.modules.loss import CTCLoss
+
+from deepspeech.models.u2 import U2Model
+
+logger = logging.getLogger(__name__)
+
+
+class U2Trainer(Trainer):
+    @classmethod
+    def params(cls, config: Optional[CfgNode]=None) -> CfgNode:
+        # training config
+        default = CfgNode(
+            dict(
+                n_epoch=50,  # train epochs
+                log_interval=100,  # steps
+                accum_grad=1,  # accum grad by # steps
+                global_grad_clip=5.0,  # the global norm clip
+            ))
+        default.optim = 'adam'
+        default.optim_conf = CfgNode(
+            dict(
+                lr=5e-4,  # learning rate
+                weight_decay=1e-6,  # the coeff of weight decay
+            ))
+        default.scheduler = 'warmuplr'
+        default.scheduler_conf = CfgNode(
+            dict(
+                warmup_steps=25000,
+                lr_decay=1.0,  # learning rate decay
+            ))
+
+        if config is not None:
+            config.merge_from_other_cfg(default)
+        return default
+
+    def __init__(self, config, args):
+        super().__init__(config, args)
+
+    def train_batch(self, batch_data):
+        train_conf = self.config.training
+        self.model.train()
+
+        start = time.time()
+        loss = self.model(*batch_data)
+        loss.backward()
+        layer_tools.print_grads(self.model, print_func=None)
+        if self.iteration % train_conf.accum_grad == 0:
+            self.optimizer.step()
+            self.optimizer.clear_grad()
+
+        iteration_time = time.time() - start
+
+        losses_np = {
+            'train_loss': float(loss),
+            'train_loss_div_batchsize':
+            float(loss) / self.config.data.batch_size
+        }
+        msg = "Train: Rank: {}, ".format(dist.get_rank())
+        msg += "epoch: {}, ".format(self.epoch)
+        msg += "step: {}, ".format(self.iteration)
+        msg += "time: {:>.3f}s, ".format(iteration_time)
+        msg += ', '.join('{}: {:>.6f}'.format(k, v)
+                         for k, v in losses_np.items())
+        if self.iteration % train_conf.log_interval == 0:
+            self.logger.info(msg)
+
+        if dist.get_rank() == 0 and self.visualizer:
+            for k, v in losses_np.items():
+                self.visualizer.add_scalar("train/{}".format(k), v,
+                                           self.iteration)
+
+    @mp_tools.rank_zero_only
+    @paddle.no_grad()
+    def valid(self):
+        self.model.eval()
+        self.logger.info(
+            f"Valid Total Examples: {len(self.valid_loader.dataset)}")
+        valid_losses = defaultdict(list)
+        for i, batch in enumerate(self.valid_loader):
+            loss = self.model(*batch)
+
+            valid_losses['val_loss'].append(float(loss))
+            valid_losses['val_loss_div_batchsize'].append(
+                float(loss) / self.config.data.batch_size)
+
+        # write visual log
+        valid_losses = {k: np.mean(v) for k, v in valid_losses.items()}
+
+        # logging
+        msg = f"Valid: Rank: {dist.get_rank()}, "
+        msg += "epoch: {}, ".format(self.epoch)
+        msg += "step: {}, ".format(self.iteration)
+        msg += ', '.join('{}: {:>.6f}'.format(k, v)
+                         for k, v in valid_losses.items())
+        self.logger.info(msg)
+
+        if self.visualizer:
+            for k, v in valid_losses.items():
+                self.visualizer.add_scalar("valid/{}".format(k), v,
+                                           self.iteration)
+
+    def setup_dataloader(self):
+        config = self.config.clone()
+        config.data.keep_transcription_text = False
+
+        # train/valid dataset, return token ids
+        config.data.manfiest = config.data.train_manifest
+        train_dataset = ManifestDataset.from_config(config)
+
+        config.data.manfiest = config.data.dev_manifest
+        config.data.augmentation_config = ""
+        dev_dataset = ManifestDataset.from_config(config)
+
+        collate_fn = SpeechCollator(keep_transcription_text=False)
+        if self.parallel:
+            batch_sampler = SortagradDistributedBatchSampler(
+                train_dataset,
+                batch_size=config.data.batch_size,
+                num_replicas=None,
+                rank=None,
+                shuffle=True,
+                drop_last=True,
+                sortagrad=config.data.sortagrad,
+                shuffle_method=config.data.shuffle_method)
+        else:
+            batch_sampler = SortagradBatchSampler(
+                train_dataset,
+                shuffle=True,
+                batch_size=config.data.batch_size,
+                drop_last=True,
+                sortagrad=config.data.sortagrad,
+                shuffle_method=config.data.shuffle_method)
+        self.train_loader = DataLoader(
+            train_dataset,
+            batch_sampler=batch_sampler,
+            collate_fn=collate_fn,
+            num_workers=config.data.num_workers, )
+        self.valid_loader = DataLoader(
+            dev_dataset,
+            batch_size=config.data.batch_size,
+            shuffle=False,
+            drop_last=False,
+            collate_fn=collate_fn)
+
+        # test dataset, return raw text
+        config.data.keep_transcription_text = True
+        config.data.augmentation_config = ""
+        config.data.manfiest = config.data.test_manifest
+        test_dataset = ManifestDataset.from_config(config)
+        # return text ord id
+        self.test_loader = DataLoader(
+            test_dataset,
+            batch_size=config.decoding.batch_size,
+            shuffle=False,
+            drop_last=False,
+            collate_fn=SpeechCollator(keep_transcription_text=True))
+        self.logger.info("Setup train/valid/test Dataloader!")
+
+    def setup_model(self):
+        config = self.config.clone()
+        model_conf = config.model
+        model_conf.input_dim = self.train_loader.dataset.feature_size
+        model_conf.output_dim = self.train_loader.dataset.vocab_size
+        model = U2Model.from_config(model_conf)
+
+        if self.parallel:
+            model = paddle.DataParallel(model)
+
+        layer_tools.print_params(model, self.logger.info)
+
+        train_config = config.training
+        optim_type = train_config.optim
+        optim_conf = train_config.train_config
+        scheduler_type = train_config.scheduler
+        scheduler_conf = train_config.scheduler_conf
+
+        grad_clip = ClipGradByGlobalNormWithLog(train_config.global_grad_clip)
+        weight_decay = paddle.regularizer.L2Decay(train_config.weight_decay)
+
+        if scheduler_type == 'expdecaylr':
+            lr_scheduler = paddle.optimizer.lr.ExponentialDecay(
+                learning_rate=optim_conf.lr,
+                gamma=scheduler_conf.lr_decay,
+                verbose=True)
+        elif scheduler_type == 'warmuplr':
+            lr_scheduler = WarmupLR(
+                learning_rate=optim_conf.lr,
+                warmup_steps=scheduler_conf.warmup_steps,
+                verbose=True)
+        else:
+            raise ValueError(f"Not support scheduler: {scheduler_type}")
+
+        if optim_type == 'adam':
+            optimizer = paddle.optimizer.Adam(
+                learning_rate=lr_scheduler,
+                parameters=model.parameters(),
+                weight_decay=weight_decay,
+                grad_clip=grad_clip)
+        else:
+            raise ValueError(f"Not support optim: {optim_type}")
+
+        self.model = model
+        self.optimizer = optimizer
+        self.lr_scheduler = lr_scheduler
+        self.logger.info("Setup model/optimizer/lr_scheduler!")
+
+
+class U2Tester(U2Trainer):
+    @classmethod
+    def params(cls, config: Optional[CfgNode]=None) -> CfgNode:
+        # decoding config
+        default = CfgNode(
+            dict(
+                alpha=2.5,  # Coef of LM for beam search.
+                beta=0.3,  # Coef of WC for beam search.
+                cutoff_prob=1.0,  # Cutoff probability for pruning.
+                cutoff_top_n=40,  # Cutoff number for pruning.
+                lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm',  # Filepath for language model.
+                decoding_method='ctc_beam_search',  # Decoding method. Options: ctc_beam_search, ctc_greedy
+                error_rate_type='wer',  # Error rate type for evaluation. Options `wer`, 'cer'
+                num_proc_bsearch=8,  # # of CPUs for beam search.
+                beam_size=500,  # Beam search width.
+                batch_size=128,  # decoding batch size
+            ))
+
+        if config is not None:
+            config.merge_from_other_cfg(default)
+        return default
+
+    def __init__(self, config, args):
+        super().__init__(config, args)
+
+    def ordid2token(self, texts, texts_len):
+        """ ord() id to chr() chr """
+        trans = []
+        for text, n in zip(texts, texts_len):
+            n = n.numpy().item()
+            ids = text[:n]
+            trans.append(''.join([chr(i) for i in ids]))
+        return trans
+
+    def compute_metrics(self, audio, texts, audio_len, texts_len):
+        cfg = self.config.decoding
+        errors_sum, len_refs, num_ins = 0.0, 0, 0
+        errors_func = error_rate.char_errors if cfg.error_rate_type == 'cer' else error_rate.word_errors
+        error_rate_func = error_rate.cer if cfg.error_rate_type == 'cer' else error_rate.wer
+
+        vocab_list = self.test_loader.dataset.vocab_list
+
+        target_transcripts = self.ordid2token(texts, texts_len)
+        result_transcripts = self.model.decode(
+            audio,
+            audio_len,
+            vocab_list,
+            decoding_method=cfg.decoding_method,
+            lang_model_path=cfg.lang_model_path,
+            beam_alpha=cfg.alpha,
+            beam_beta=cfg.beta,
+            beam_size=cfg.beam_size,
+            cutoff_prob=cfg.cutoff_prob,
+            cutoff_top_n=cfg.cutoff_top_n,
+            num_processes=cfg.num_proc_bsearch)
+
+        for target, result in zip(target_transcripts, result_transcripts):
+            errors, len_ref = errors_func(target, result)
+            errors_sum += errors
+            len_refs += len_ref
+            num_ins += 1
+            self.logger.info(
+                "\nTarget Transcription: %s\nOutput Transcription: %s" %
+                (target, result))
+            self.logger.info("Current error rate [%s] = %f" % (
+                cfg.error_rate_type, error_rate_func(target, result)))
+
+        return dict(
+            errors_sum=errors_sum,
+            len_refs=len_refs,
+            num_ins=num_ins,
+            error_rate=errors_sum / len_refs,
+            error_rate_type=cfg.error_rate_type)
+
+    @mp_tools.rank_zero_only
+    @paddle.no_grad()
+    def test(self):
+        self.model.eval()
+        self.logger.info(
+            f"Test Total Examples: {len(self.test_loader.dataset)}")
+
+        error_rate_type = None
+        errors_sum, len_refs, num_ins = 0.0, 0, 0
+
+        for i, batch in enumerate(self.test_loader):
+            metrics = self.compute_metrics(*batch)
+            errors_sum += metrics['errors_sum']
+            len_refs += metrics['len_refs']
+            num_ins += metrics['num_ins']
+            error_rate_type = metrics['error_rate_type']
+            self.logger.info("Error rate [%s] (%d/?) = %f" %
+                             (error_rate_type, num_ins, errors_sum / len_refs))
+
+        # logging
+        msg = "Test: "
+        msg += "epoch: {}, ".format(self.epoch)
+        msg += "step: {}, ".format(self.iteration)
+        msg += ", Final error rate [%s] (%d/%d) = %f" % (
+            error_rate_type, num_ins, num_ins, errors_sum / len_refs)
+        self.logger.info(msg)
+
+    def run_test(self):
+        self.resume_or_load()
+        try:
+            self.test()
+        except KeyboardInterrupt:
+            exit(-1)
+
+    def export(self):
+        from deepspeech.models.u2 import U2InferModel
+        infer_model = U2InferModel.from_pretrained(self.test_loader.dataset,
+                                                   self.config.model.clone(),
+                                                   self.args.checkpoint_path)
+        infer_model.eval()
+        feat_dim = self.test_loader.dataset.feature_size
+        static_model = paddle.jit.to_static(
+            infer_model,
+            input_spec=[
+                paddle.static.InputSpec(
+                    shape=[None, feat_dim, None],
+                    dtype='float32'),  # audio, [B,D,T]
+                paddle.static.InputSpec(shape=[None],
+                                        dtype='int64'),  # audio_length, [B]
+            ])
+        logger.info(f"Export code: {static_model.forward.code}")
+        paddle.jit.save(static_model, self.args.export_path)
+
+    def run_export(self):
+        try:
+            self.export()
+        except KeyboardInterrupt:
+            exit(-1)
+
+    def setup(self):
+        """Setup the experiment.
+        """
+        paddle.set_device(self.args.device)
+
+        self.setup_output_dir()
+        self.setup_checkpointer()
+        self.setup_logger()
+
+        self.setup_dataloader()
+        self.setup_model()
+
+        self.iteration = 0
+        self.epoch = 0
+
+    def setup_output_dir(self):
+        """Create a directory used for output.
+        """
+        # output dir
+        if self.args.output:
+            output_dir = Path(self.args.output).expanduser()
+            output_dir.mkdir(parents=True, exist_ok=True)
+        else:
+            output_dir = Path(
+                self.args.checkpoint_path).expanduser().parent.parent
+            output_dir.mkdir(parents=True, exist_ok=True)
+
+        self.output_dir = output_dir
+
+    def setup_logger(self):
+        """Initialize a text logger to log the experiment.
+        
+        Each process has its own text logger. The logging message is write to 
+        the standard output and a text file named ``worker_n.log`` in the 
+        output directory, where ``n`` means the rank of the process. 
+        """
+        format = '[%(levelname)s %(asctime)s %(filename)s:%(lineno)d] %(message)s'
+        formatter = logging.Formatter(fmt=format, datefmt='%Y/%m/%d %H:%M:%S')
+
+        logger.setLevel("INFO")
+
+        # global logger
+        stdout = True
+        save_path = ""
+        logging.basicConfig(
+            level=logging.DEBUG if stdout else logging.INFO,
+            format=format,
+            datefmt='%Y/%m/%d %H:%M:%S',
+            filename=save_path if not stdout else None)
+        self.logger = logger

deepspeech/frontend/augmentor/augmentation.py

@@ -83,7 +83,7 @@ class AugmentationPipeline():
     :raises ValueError: If the augmentation json config is in incorrect format".
     """
 
-    def __init__(self, augmentation_config, random_seed=0):
+    def __init__(self, augmentation_config: str, random_seed=0):
         self._rng = random.Random(random_seed)
         self._augmentors, self._rates = self._parse_pipeline_from(
             augmentation_config)

deepspeech/io/dataset.py

@@ -20,6 +20,7 @@ import logging
 import numpy as np
 from collections import namedtuple
 from functools import partial
+from yacs.config import CfgNode
 
 from paddle.io import Dataset
 
@@ -37,6 +38,97 @@ __all__ = [
 
 
 class ManifestDataset(Dataset):
+    @classmethod
+    def params(cls, config: Optional[CfgNode]=None) -> CfgNode:
+        default = CfgNode(
+            dict(
+                train_manifest="",
+                dev_manifest="",
+                test_manifest="",
+                unit_type="char",
+                vocab_filepath="",
+                spm_model_prefix="",
+                mean_std_filepath="",
+                augmentation_config="",
+                max_input_len=27.0,
+                min_input_len=0.0,
+                max_output_len=float('inf'),
+                min_output_len=0.0,
+                max_output_input_ratio=float('inf'),
+                min_output_input_ratio=0.0,
+                stride_ms=10.0,  # ms
+                window_ms=20.0,  # ms
+                n_fft=None,  # fft points
+                max_freq=None,  # None for samplerate/2
+                raw_wav=True,  # use raw_wav or kaldi feature
+                specgram_type='linear',  # 'linear', 'mfcc', 'fbank'
+                feat_dim=0,  # 'mfcc', 'fbank'
+                delat_delta=False,  # 'mfcc', 'fbank'
+                target_sample_rate=16000,  # target sample rate
+                use_dB_normalization=True,
+                target_dB=-20,
+                random_seed=0,
+                keep_transcription_text=False,
+                batch_size=32,  # batch size
+                num_workers=0,  # data loader workers
+                sortagrad=False,  # sorted in first epoch when True
+                shuffle_method="batch_shuffle",  # 'batch_shuffle', 'instance_shuffle'
+            ))
+
+        if config is not None:
+            config.merge_from_other_cfg(default)
+        return default
+
+    @classmethod
+    def from_config(cls, config):
+        """Build a ManifestDataset object from a config.
+
+        Args:
+            config (yacs.config.CfgNode): configs object.
+
+        Returns:
+            ManifestDataset: dataet object.
+        """
+        assert manifest in config.data
+        assert keep_transcription_text in config.data
+
+        if isinstance(config.data.augmentation_config, (str, bytes)):
+            if config.data.augmentation_config:
+                aug_file = io.open(
+                    config.data.augmentation_config, mode='r', encoding='utf8')
+            else:
+                aug_file = io.StringIO(initial_value='{}', newline='')
+        else:
+            aug_file = config.data.augmentation_config
+            assert isinstance(aug_file, io.StringIO)
+
+        dataset = cls(
+            manifest_path=config.data.manifest,
+            unit_type=config.data.unit_type,
+            vocab_filepath=config.data.vocab_filepath,
+            mean_std_filepath=config.data.mean_std_filepath,
+            spm_model_prefix=config.data.spm_model_prefix,
+            augmentation_config=aug_file.read(),
+            max_input_len=config.data.max_input_len,
+            min_input_len=config.data.min_input_len,
+            max_output_len=config.data.max_output_len,
+            min_output_len=config.data.min_output_len,
+            max_output_input_ratio=config.data.max_output_input_ratio,
+            min_output_input_ratio=config.data.min_output_input_ratio,
+            stride_ms=config.data.stride_ms,
+            window_ms=config.data.window_ms,
+            n_fft=config.data.n_fft,
+            max_freq=config.data.max_freq,
+            target_sample_rate=config.data.target_sample_rate,
+            specgram_type=config.data.specgram_type,
+            feat_dim=config.data.feat_dim,
+            delta_delta=config.data.delat_delta,
+            use_dB_normalization=config.data.use_dB_normalization,
+            target_dB=config.data.target_dB,
+            random_seed=config.data.random_seed,
+            keep_transcription_text=config.data.keep_transcription_text)
+        return dataset
+
     def __init__(self,
                  manifest_path,
                  unit_type,
@@ -98,7 +190,8 @@ class ManifestDataset(Dataset):
         self._max_output_input_ratio = max_output_input_ratio,
         self._min_output_input_ratio = min_output_input_ratio,
 
-        self._normalizer = FeatureNormalizer(mean_std_filepath)
+        self._normalizer = FeatureNormalizer(
+            mean_std_filepath) if mean_std_filepath else None
         self._audio_augmentation_pipeline = AugmentationPipeline(
             augmentation_config=augmentation_config, random_seed=random_seed)
         self._speech_featurizer = SpeechFeaturizer(
@@ -134,51 +227,6 @@ class ManifestDataset(Dataset):
             min_output_input_ratio=min_output_input_ratio)
         self._manifest.sort(key=lambda x: x["feat_shape"][0])
 
-    @classmethod
-    def from_config(cls, config):
-        """Build a ManifestDataset object from a config.
-
-        Args:
-            config (yacs.config.CfgNode): configs object.
-
-        Returns:
-            ManifestDataset: dataet object.
-        """
-        assert manifest in config.data
-        assert keep_transcription_text in config.data
-        if isinstance(config.data.augmentation_config, (str, bytes)):
-            aug_file = io.open(
-                config.data.augmentation_config, mode='r', encoding='utf8')
-        else:
-            aug_file = config.data.augmentation_config
-            assert isinstance(aug_file, io.StringIO)
-        dataset = cls(
-            manifest_path=config.data.manifest,
-            unit_type=config.data.unit_type,
-            vocab_filepath=config.data.vocab_filepath,
-            mean_std_filepath=config.data.mean_std_filepath,
-            spm_model_prefix=config.data.spm_model_prefix,
-            augmentation_config=aug_file.read(),
-            max_input_len=config.data.max_input_len,
-            min_input_len=config.data.min_input_len,
-            max_output_len=config.data.max_output_len,
-            min_output_len=config.data.min_output_len,
-            max_output_input_ratio=config.data.max_output_input_ratio,
-            min_output_input_ratio=config.data.min_output_input_ratio,
-            stride_ms=config.data.stride_ms,
-            window_ms=config.data.window_ms,
-            n_fft=config.data.n_fft,
-            max_freq=config.data.max_freq,
-            target_sample_rate=config.data.target_sample_rate,
-            specgram_type=config.data.specgram_type,
-            feat_dim=config.data.feat_dim,
-            delta_delta=config.data.delat_delta,
-            use_dB_normalization=config.data.use_dB_normalization,
-            target_dB=config.data.target_dB,
-            random_seed=config.data.random_seed,
-            keep_transcription_text=config.data.keep_transcription_text)
-        return dataset
-
     @property
     def manifest(self):
         return self._manifest
@@ -252,6 +300,7 @@ class ManifestDataset(Dataset):
         self._audio_augmentation_pipeline.transform_audio(speech_segment)
         specgram, transcript_part = self._speech_featurizer.featurize(
             speech_segment, self._keep_transcription_text)
+        if self._normalizer:
             specgram = self._normalizer.apply(specgram)
         return specgram, transcript_part
 

deepspeech/models/u2.py

@@ -60,6 +60,54 @@ __all__ = ['U2TransformerModel', "U2ConformerModel"]
 class U2BaseModel(nn.Module):
     """CTC-Attention hybrid Encoder-Decoder model"""
 
+    @classmethod
+    def params(cls, config: Optional[CfgNode]=None) -> CfgNode:
+        # network architecture
+        default = CfgNode()
+        default.cmvn_file = ""
+        default.cmvn_file_type = "npz"
+        default.input_dim = 0
+        default.output_dim = 0
+        # encoder related
+        default.encoder = 'conformer'
+        default.encoder_conf = CfgNode(
+            dict(
+                output_size=256,  # dimension of attention
+                attention_heads=4,
+                linear_units=2048,  # the number of units of position-wise feed forward
+                num_blocks=12,  # the number of encoder blocks
+                dropout_rate=0.1,
+                positional_dropout_rate=0.1,
+                attention_dropout_rate=0.0,
+                input_layer=conv2d,  # encoder input type, you can chose conv2d, conv2d6 and conv2d8
+                normalize_before=true,
+                cnn_module_kernel=15,
+                use_cnn_module=True,
+                activation_type='swish',
+                pos_enc_layer_type='rel_pos',
+                selfattention_layer_type='rel_selfattn', ))
+        # decoder related
+        default.decoder = 'transformer'
+        default.decoder_conf = CfgNode(
+            dict(
+                attention_heads=4,
+                linear_units=2048,
+                num_blocks=6,
+                dropout_rate=0.1,
+                positional_dropout_rate=0.1,
+                self_attention_dropout_rate=0.0,
+                src_attention_dropout_rate=0.0, ))
+        # hybrid CTC/attention
+        default.model_conf = CfgNode(
+            dict(
+                ctc_weight=0.3,
+                lsm_weight=0.1,  # label smoothing option
+                length_normalized_loss=false, ))
+
+        if config is not None:
+            config.merge_from_other_cfg(default)
+        return default
+
     def __init__(self,
                  vocab_size: int,
                  encoder: TransformerEncoder,
@@ -669,6 +717,8 @@ class U2Model(U2BaseModel):
 
         input_dim = configs['input_dim']
         vocab_size = configs['output_dim']
+        assert input_dim != 0, input_dim
+        assert vocab_size != 0, vocab_size
 
         encoder_type = configs.get('encoder', 'transformer')
         logger.info(f"U2 Encoder type: {encoder_type}")
@@ -679,7 +729,7 @@ class U2Model(U2BaseModel):
             encoder = ConformerEncoder(
                 input_dim, global_cmvn=global_cmvn, **configs['encoder_conf'])
         else:
-            raise ValueError("not support encoder type:{encoder_type}")
+            raise ValueError(f"not support encoder type:{encoder_type}")
 
         decoder = TransformerDecoder(vocab_size,
                                      encoder.output_size(),
@@ -688,18 +738,18 @@ class U2Model(U2BaseModel):
         return vocab_size, encoder, decoder, ctc
 
     @classmethod
-    def from_pretrained(cls, dataset, config, checkpoint_path):
-        """Build a DeepSpeech2Model model from a pretrained model.
+    def from_config(cls, configs: dict):
+        """init model.
 
         Args:
-            dataset (paddle.io.Dataset): [description]
-            config (yacs.config.CfgNode):  model configs
-            checkpoint_path (Path or str): the path of pretrained model checkpoint, without extension name
+            configs (dict): config dict.
+
+        Raises:
+            ValueError: raise when using not support encoder type.
 
         Returns:
-            DeepSpeech2Model: The model built from pretrained result.
+            int, nn.Layer, nn.Layer, nn.Layer: vocab size, encoder, decoder, ctc 
         """
-
         vocab_size, encoder, decoder, ctc = U2Model._init_from_config(configs)
 
         model = cls(vocab_size=vocab_size,
@@ -707,9 +757,44 @@ class U2Model(U2BaseModel):
                     decoder=decoder,
                     ctc=ctc,
                     **configs['model_conf'])
+        return model
+
+    @classmethod
+    def from_pretrained(cls, dataset, config, checkpoint_path):
+        """Build a DeepSpeech2Model model from a pretrained model.
 
+        Args:
+            dataset (paddle.io.Dataset): not used.
+            config (yacs.config.CfgNode):  model configs
+            checkpoint_path (Path or str): the path of pretrained model checkpoint, without extension name
+
+        Returns:
+            DeepSpeech2Model: The model built from pretrained result.
+        """
+        config.input_dim = self.dataset.feature_size
+        config.output_dim = self.dataset.vocab_size
+        model = cls.from_config(config)
+
+        if checkpoint_path:
             infos = checkpoint.load_parameters(
                 model, checkpoint_path=checkpoint_path)
             logger.info(f"checkpoint info: {infos}")
         layer_tools.summary(model)
         return model
+
+
+class U2InferModel(U2Model):
+    def __init__(self, configs: dict):
+        super().__init__(configs)
+
+    def forward(self, audio, audio_len):
+        """export model function
+
+        Args:
+            audio (Tensor): [B, T, D]
+            audio_len (Tensor): [B]
+
+        Returns:
+            probs: probs after softmax
+        """
+        raise NotImplementedError("U2Model infer")

deepspeech/training/trainer.py

@@ -95,6 +95,8 @@ class Trainer():
         self.output_dir = None
         self.checkpoint_dir = None
         self.logger = None
+        self.iteration = 0
+        self.epoch = 0
 
     def setup(self):
         """Setup the experiment.

deepspeech/utils/socket_server.py

@@ -16,6 +16,7 @@ import os
 import random
 import time
 from time import gmtime, strftime
+import socket
 import socketserver
 import struct
 import wave

examples/tiny/s1/conf/conformer.yaml

@@ -6,7 +6,7 @@ data:
   vocab_filepath: data/vocab.txt 
   unit_type: 'spm'
   spm_model_prefix: 'bpe_unigram_200'
-  mean_std_filepath: data/mean_std.npz
+  mean_std_filepath: ""
   augmentation_config: conf/augmentation.config
   batch_size: 4
   max_input_len: 27.0
@@ -23,7 +23,7 @@ data:
   max_freq: None
   n_fft: None
   stride_ms: 10.0
-  window_ms: 20.0
+  window_ms: 25.0
   use_dB_normalization: True
   target_dB: -20
   random_seed: 0
@@ -33,10 +33,52 @@ data:
   num_workers: 0
 
 
+#   # feature extraction
+# collate_conf:
+#     # waveform level config
+#     wav_distortion_conf:
+#         wav_dither: 0.1
+#         wav_distortion_rate: 0.0
+#         distortion_methods: []
+#     speed_perturb: true
+#     feature_extraction_conf:
+#         feature_type: 'fbank'
+#         mel_bins: 80
+#         frame_shift: 10
+#         frame_length: 25
+#         using_pitch: false
+#     # spec level config
+#     # spec_swap: false
+#     feature_dither: 0.0 # add dither [-feature_dither,feature_dither] on fbank feature
+#     spec_aug: true
+#     spec_aug_conf:
+#         warp_for_time: False
+#         num_t_mask: 2
+#         num_f_mask: 2
+#         max_t: 50
+#         max_f: 10
+#         max_w: 80
+
+
+# # dataset related
+# dataset_conf:
+#     max_length: 40960
+#     min_length: 0
+#     batch_type: 'static' # static or dynamic
+#     # the size of batch_size should be set according to your gpu memory size, here we used 2080ti gpu whose memory size is 11GB
+#     batch_size: 16
+#     sort: true
+
+
+
+
 # network architecture
-# encoder related
-encoder: conformer
-encoder_conf:
+model:
+    cmvn_file: "data/mean_std.npz"
+    cmvn_file_type: "npz"
+    # encoder related
+    encoder: conformer
+    encoder_conf:
         output_size: 256    # dimension of attention
         attention_heads: 4
         linear_units: 2048  # the number of units of position-wise feed forward
@@ -46,15 +88,15 @@ encoder_conf:
         attention_dropout_rate: 0.0
         input_layer: conv2d # encoder input type, you can chose conv2d, conv2d6 and conv2d8
         normalize_before: true
-    cnn_module_kernel: 15
         use_cnn_module: True
+        cnn_module_kernel: 15
         activation_type: 'swish'
         pos_enc_layer_type: 'rel_pos'
         selfattention_layer_type: 'rel_selfattn'
 
-# decoder related
-decoder: transformer
-decoder_conf:
+    # decoder related
+    decoder: transformer
+    decoder_conf:
         attention_heads: 4
         linear_units: 2048
         num_blocks: 6
@@ -63,56 +105,37 @@ decoder_conf:
         self_attention_dropout_rate: 0.0
         src_attention_dropout_rate: 0.0
 
-# hybrid CTC/attention
-model_conf:
+    # hybrid CTC/attention
+    model_conf:
         ctc_weight: 0.3
         lsm_weight: 0.1     # label smoothing option
         length_normalized_loss: false
 
-# feature extraction
-collate_conf:
-    # waveform level config
-    wav_distortion_conf:
-        wav_dither: 0.1
-        wav_distortion_rate: 0.0
-        distortion_methods: []
-    speed_perturb: true
-    feature_extraction_conf:
-        feature_type: 'fbank'
-        mel_bins: 80
-        frame_shift: 10
-        frame_length: 25
-        using_pitch: false
-    # spec level config
-    # spec_swap: false
-    feature_dither: 0.0 # add dither [-feature_dither,feature_dither] on fbank feature
-    spec_aug: true
-    spec_aug_conf:
-        warp_for_time: False
-        num_t_mask: 2
-        num_f_mask: 2
-        max_t: 50
-        max_f: 10
-        max_w: 80
 
+training:
+  n_epoch: 20
+  accum_grad: 4
+  global_grad_clip: 5.0
+  optim: adam
+  optim_conf:
+    lr: 0.002
+    lr_decay: 1.0 
+    weight_decay: 1e-06
+  scheduler: warmuplr     # pytorch v1.1.0+ required
+  scheduler_conf:
+    warmup_steps: 25000
+  log_interval: 100
 
-# dataset related
-dataset_conf:
-    max_length: 40960
-    min_length: 0
-    batch_type: 'static' # static or dynamic
-    # the size of batch_size should be set according to your gpu memory size, here we used 2080ti gpu whose memory size is 11GB
-    batch_size: 16
-    sort: true
+decoding:
+  batch_size: 128
+  error_rate_type: wer
+  decoding_method: ctc_beam_search
+  lang_model_path: data/lm/common_crawl_00.prune01111.trie.klm
+  alpha: 2.5
+  beta: 0.3
+  beam_size: 500
+  cutoff_prob: 1.0
+  cutoff_top_n: 40
+  num_proc_bsearch: 8
 
-grad_clip: 5
-accum_grad: 4
-max_epoch: 240
-log_interval: 100
 
-optim: adam
-optim_conf:
-    lr: 0.002
-scheduler: warmuplr     # pytorch v1.1.0+ required
-scheduler_conf:
-    warmup_steps: 25000
\ No newline at end of file

examples/tiny/s1/local/train.sh

+#! /usr/bin/env bash
+
+export FLAGS_sync_nccl_allreduce=0
+
+CUDA_VISIBLE_DEVICES=0 \
+python3 -u ${BIN_DIR}/train.py \
+--device 'gpu' \
+--nproc 1 \
+--config conf/conformer.yaml \
+--output ckpt
+
+if [ $? -ne 0 ]; then
+    echo "Failed in training!"
+    exit 1
+fi
+
+
+exit 0

requirements.txt

-scipy==1.2.1
+pre-commit
+python_speech_features
 resampy==0.2.2
+scipy==1.2.1
+sentencepiece
 SoundFile==0.9.0.post1
-python_speech_features
 tensorboardX
-sentencepiece
-yacs
 typeguard
-pre-commit
-#paddlepaddle-gpu==2.0.0
+yacs