Support paddle 2.x (#538)

* 2.x model

* model test pass

* fix data

* fix soundfile with flac support

* one thread dataloader test pass

* export feasture size
add trainer and utils
add setup model and dataloader
update travis using Bionic dist

* add venv; test under venv

* fix unittest; train and valid

* add train and config

* add config and train script

* fix ctc cuda memcopy error

* fix imports

* fix train valid log

* fix dataset batch shuffle shift start from 1
fix rank_zero_only decreator error
close tensorboard when train over
add decoding config and code

* test process can run

* test with decoding

* test and infer with decoding

* fix infer

* fix ctc loss
lr schedule
sortagrad
logger

* aishell egs

* refactor train
add aishell egs

* fix dataset batch shuffle and add batch sampler log
print model parameter

* fix model and ctc

* sequence_mask make all inputs zeros, which cause grad be zero, this is a bug of LessThanOp
add grad clip by global norm
add model train test notebook

* ctc loss
remove run prefix
using ord value as text id

* using unk when training
compute_loss need text ids
ord id using in test mode, which compute wer/cer

* fix tester

* add lr_deacy
refactor code

* fix tools

* fix ci
add tune
fix gru model bugs
add dataset and model test

* fix decoding

* refactor repo
fix decoding

* fix musan and rir dataset

* refactor io, loss, conv, rnn, gradclip, model, utils

* fix ci and import

* refactor model
add export jit model

* add deploy bin and test it

* rm uselss egs

* add layer tools

* refactor socket server
new model from pretrain

* remve useless

* fix instability loss and grad nan or inf for librispeech training

* fix sampler

* fix libri train.sh

* fix doc

* add license on cpp

* fix doc

* fix libri script

* fix install

* clip 5 wer 7.39, clip 400 wer 7.54, 1.8 clip 400 baseline 7.49

.gitignore

 .DS_Store
 *.pyc
+tools/venv
+.vscode
+*.log
+*.pdmodel
+*.pdiparams*

.pre-commit-config.yaml

@@ -38,4 +38,4 @@
         entry: python .pre-commit-hooks/copyright-check.hook
         language: system
         files: \.(c|cc|cxx|cpp|cu|h|hpp|hxx|proto|py)$
-        exclude: (?=decoders/swig).*(\.cpp|\.h)$
+        #exclude: (?=decoders/swig).*(\.cpp|\.h)$
\ No newline at end of file

.travis.yml

 language: cpp
 cache: ccache
 sudo: required
-dist: xenial 
+dist: Bionic 
 services:
   - docker
 os:
@@ -26,7 +26,7 @@ script:
   - exit_code=0
   - .travis/precommit.sh || exit_code=$(( exit_code | $? ))
   - docker run -i --rm -v "$PWD:/py_unittest" paddlepaddle/paddle:latest /bin/bash -c
-    'cd /py_unittest; sh .travis/unittest.sh' || exit_code=$(( exit_code | $? ))
+    'cd /py_unittest; source env.sh; bash .travis/unittest.sh' || exit_code=$(( exit_code | $? ))
     exit $exit_code
 
 notifications:

.travis/unittest.sh

@@ -15,7 +15,7 @@ unittest(){
     if [ $? != 0 ]; then
         exit 1
     fi
-    find . -name 'tests' -type d -print0 | \
+    find . -path ./tools/venv -prune -false -o -name 'tests' -type d -print0 | \
         xargs -0 -I{} -n1 bash -c \
         'python3 -m unittest discover -v -s {}'
     cd - > /dev/null
@@ -24,6 +24,10 @@ unittest(){
 trap 'abort' 0
 set -e
 
+cd tools; make; cd - 
+. tools/venv/bin/activate
+pip3 install pytest
+
 unittest .
 
 trap : 0

deepspeech/decoders/swig/.gitignore

+ThreadPool/
+build/
+dist/
+kenlm/
+openfst-1.6.3/
+openfst-1.6.3.tar.gz
+swig_decoders.egg-info/
+decoders_wrap.cxx
+swig_decoders.py

decoders/swig/ctc_beam_search_decoder.cpp → deepspeech/decoders/swig/ctc_beam_search_decoder.cpp

+// 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.
+
 #include "ctc_beam_search_decoder.h"
 
 #include <algorithm>

decoders/swig/ctc_beam_search_decoder.h → deepspeech/decoders/swig/ctc_beam_search_decoder.h

+// 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.
+
 #ifndef CTC_BEAM_SEARCH_DECODER_H_
 #define CTC_BEAM_SEARCH_DECODER_H_
 

decoders/swig/ctc_greedy_decoder.cpp → deepspeech/decoders/swig/ctc_greedy_decoder.cpp

+// 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.
+
 #include "ctc_greedy_decoder.h"
 #include "decoder_utils.h"
 

decoders/swig/ctc_greedy_decoder.h → deepspeech/decoders/swig/ctc_greedy_decoder.h

+// 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.
+
 #ifndef CTC_GREEDY_DECODER_H
 #define CTC_GREEDY_DECODER_H
 

decoders/swig/decoder_utils.cpp → deepspeech/decoders/swig/decoder_utils.cpp

+// 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.
+
 #include "decoder_utils.h"
 
 #include <algorithm>

decoders/swig/decoder_utils.h → deepspeech/decoders/swig/decoder_utils.h

+// 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.
+
 #ifndef DECODER_UTILS_H_
 #define DECODER_UTILS_H_
 

decoders/swig/path_trie.cpp → deepspeech/decoders/swig/path_trie.cpp

+// 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.
+
 #include "path_trie.h"
 
 #include <algorithm>

decoders/swig/path_trie.h → deepspeech/decoders/swig/path_trie.h

+// 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.
+
 #ifndef PATH_TRIE_H
 #define PATH_TRIE_H
 

decoders/swig/scorer.cpp → deepspeech/decoders/swig/scorer.cpp

+// 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.
+
 #include "scorer.h"
 
 #include <unistd.h>

decoders/swig/scorer.h → deepspeech/decoders/swig/scorer.h

+// 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.
+
 #ifndef SCORER_H_
 #define SCORER_H_
 

decoders/swig/setup.py → deepspeech/decoders/swig/setup.py

@@ -81,9 +81,8 @@ FILES = glob.glob('kenlm/util/*.cc') \
 FILES += glob.glob('openfst-1.6.3/src/lib/*.cc')
 
 FILES = [
-    fn for fn in FILES
-    if not (fn.endswith('main.cc') or fn.endswith('test.cc') or fn.endswith(
-        'unittest.cc'))
+    fn for fn in FILES if not (fn.endswith('main.cc') or fn.endswith('test.cc')
+                               or fn.endswith('unittest.cc'))
 ]
 
 LIBS = ['stdc++']

decoders/swig_wrapper.py → deepspeech/decoders/swig_wrapper.py

@@ -46,7 +46,7 @@ def ctc_greedy_decoder(probs_seq, vocabulary):
     :rtype: str
     """
     result = swig_decoders.ctc_greedy_decoder(probs_seq.tolist(), vocabulary)
-    return result.decode('utf-8')
+    return result
 
 
 def ctc_beam_search_decoder(probs_seq,

decoders/tests/test_decoders.py → deepspeech/decoders/tests/test_decoders.py

@@ -14,7 +14,7 @@
 """Test decoders."""
 
 import unittest
-from decoders import decoders_deprecated as decoder
+from deepspeech.decoders import decoders_deprecated as decoder
 
 
 class TestDecoders(unittest.TestCase):

deploy/demo_client.py → deepspeech/exps/deepspeech2/bin/deploy/client.py

@@ -19,6 +19,8 @@ import sys
 import argparse
 import pyaudio
 
+from deepspeech.utils.socket_server import socket_send
+
 parser = argparse.ArgumentParser(description=__doc__)
 parser.add_argument(
     "--host_ip",
@@ -61,16 +63,7 @@ def callback(in_data, frame_count, time_info, status):
         data_list.append(in_data)
         enable_trigger_record = False
     elif len(data_list) > 0:
-        # Connect to server and send data
-        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        sock.connect((args.host_ip, args.host_port))
-        sent = ''.join(data_list)
-        sock.sendall(struct.pack('>i', len(sent)) + sent)
-        print('Speech[length=%d] Sent.' % len(sent))
-        # Receive data from the server and shut down
-        received = sock.recv(1024)
-        print("Recognition Results: {}".format(received))
-        sock.close()
+        socket_send(args.host_ip, args.host_port, ''.join(data_list))
         data_list = []
     enable_trigger_record = True
     return (in_data, pyaudio.paContinue)
@@ -80,7 +73,7 @@ def main():
     # prepare audio recorder
     p = pyaudio.PyAudio()
     stream = p.open(
-        format=pyaudio.paInt32,
+        format=pyaudio.paInt16,
         channels=1,
         rate=16000,
         input=True,

deepspeech/exps/deepspeech2/bin/deploy/record.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.
+"""Record wav from Microphone"""
+# http://people.csail.mit.edu/hubert/pyaudio/
+import pyaudio
+import wave
+
+CHUNK = 1024
+FORMAT = pyaudio.paInt16
+CHANNELS = 1
+RATE = 16000
+RECORD_SECONDS = 5
+WAVE_OUTPUT_FILENAME = "output.wav"
+
+p = pyaudio.PyAudio()
+
+stream = p.open(
+    format=FORMAT,
+    channels=CHANNELS,
+    rate=RATE,
+    input=True,
+    frames_per_buffer=CHUNK)
+
+print("* recording")
+
+frames = []
+
+for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
+    data = stream.read(CHUNK)
+    frames.append(data)
+
+print("* done recording")
+
+stream.stop_stream()
+stream.close()
+p.terminate()
+
+wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
+wf.setnchannels(CHANNELS)
+wf.setsampwidth(p.get_sample_size(FORMAT))
+wf.setframerate(RATE)
+wf.writeframes(b''.join(frames))
+wf.close()

deepspeech/exps/deepspeech2/bin/deploy/runtime.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.
+"""Server-end for the ASR demo."""
+import os
+import time
+import argparse
+import functools
+import paddle
+import numpy as np
+
+from deepspeech.utils.socket_server import warm_up_test
+from deepspeech.utils.socket_server import AsrTCPServer
+from deepspeech.utils.socket_server import AsrRequestHandler
+
+from deepspeech.training.cli import default_argument_parser
+from deepspeech.exps.deepspeech2.config import get_cfg_defaults
+
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.utils.utility import add_arguments, print_arguments
+
+from deepspeech.models.deepspeech2 import DeepSpeech2Model
+from deepspeech.io.dataset import ManifestDataset
+
+from paddle.inference import Config
+from paddle.inference import create_predictor
+
+
+def init_predictor(args):
+    if args.model_dir is not None:
+        config = Config(args.model_dir)
+    else:
+        config = Config(args.model_file, args.params_file)
+
+    config.enable_memory_optim()
+    if args.use_gpu:
+        config.enable_use_gpu(memory_pool_init_size_mb=1000, device_id=0)
+    else:
+        # If not specific mkldnn, you can set the blas thread.
+        # The thread num should not be greater than the number of cores in the CPU.
+        config.set_cpu_math_library_num_threads(4)
+        config.enable_mkldnn()
+
+    predictor = create_predictor(config)
+    return predictor
+
+
+def run(predictor, img):
+    # copy img data to input tensor
+    input_names = predictor.get_input_names()
+    for i, name in enumerate(input_names):
+        input_tensor = predictor.get_input_handle(name)
+        #input_tensor.reshape(img[i].shape)
+        #input_tensor.copy_from_cpu(img[i].copy())
+
+    # do the inference
+    predictor.run()
+
+    results = []
+    # get out data from output tensor
+    output_names = predictor.get_output_names()
+    for i, name in enumerate(output_names):
+        output_tensor = predictor.get_output_handle(name)
+        output_data = output_tensor.copy_to_cpu()
+        results.append(output_data)
+
+    return results
+
+
+def inference(config, args):
+    predictor = init_predictor(args)
+
+
+def start_server(config, args):
+    """Start the ASR server"""
+    dataset = ManifestDataset(
+        config.data.test_manifest,
+        config.data.vocab_filepath,
+        config.data.mean_std_filepath,
+        augmentation_config="{}",
+        max_duration=config.data.max_duration,
+        min_duration=config.data.min_duration,
+        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,
+        use_dB_normalization=config.data.use_dB_normalization,
+        target_dB=config.data.target_dB,
+        random_seed=config.data.random_seed,
+        keep_transcription_text=True)
+
+    model = DeepSpeech2Model.from_pretrained(dataset, config,
+                                             args.checkpoint_path)
+    model.eval()
+
+    # prepare ASR inference handler
+    def file_to_transcript(filename):
+        feature = dataset.process_utterance(filename, "")
+        audio = np.array([feature[0]]).astype('float32')  #[1, D, T]
+        audio_len = feature[0].shape[1]
+        audio_len = np.array([audio_len]).astype('int64')  # [1]
+
+        result_transcript = model.decode(
+            paddle.to_tensor(audio),
+            paddle.to_tensor(audio_len),
+            vocab_list=dataset.vocab_list,
+            decoding_method=config.decoding.decoding_method,
+            lang_model_path=config.decoding.lang_model_path,
+            beam_alpha=config.decoding.alpha,
+            beam_beta=config.decoding.beta,
+            beam_size=config.decoding.beam_size,
+            cutoff_prob=config.decoding.cutoff_prob,
+            cutoff_top_n=config.decoding.cutoff_top_n,
+            num_processes=config.decoding.num_proc_bsearch)
+        return result_transcript[0]
+
+    # warming up with utterrances sampled from Librispeech
+    print('-----------------------------------------------------------')
+    print('Warming up ...')
+    warm_up_test(
+        audio_process_handler=file_to_transcript,
+        manifest_path=args.warmup_manifest,
+        num_test_cases=3)
+    print('-----------------------------------------------------------')
+
+    # start the server
+    server = AsrTCPServer(
+        server_address=(args.host_ip, args.host_port),
+        RequestHandlerClass=AsrRequestHandler,
+        speech_save_dir=args.speech_save_dir,
+        audio_process_handler=file_to_transcript)
+    print("ASR Server Started.")
+    server.serve_forever()
+
+
+def main(config, args):
+    start_server(config, args)
+
+
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    add_arg = functools.partial(add_arguments, argparser=parser)
+    # yapf: disable
+    add_arg('host_ip',          str,
+            'localhost',
+            "Server's IP address.")
+    add_arg('host_port',        int,    8086,    "Server's IP port.")
+    add_arg('speech_save_dir',  str,
+            'demo_cache',
+            "Directory to save demo audios.")
+    add_arg('warmup_manifest',  str, None, "Filepath of manifest to warm up.")
+    add_arg(
+        "--model_file",
+        type=str,
+        default="",
+        help="Model filename, Specify this when your model is a combined model."
+    )
+    add_arg(
+        "--params_file",
+        type=str,
+        default="",
+        help=
+        "Parameter filename, Specify this when your model is a combined model."
+    )
+    add_arg(
+        "--model_dir",
+        type=str,
+        default=None,
+        help=
+        "Model dir, If you load a non-combined model, specify the directory of the model."
+    )
+    add_arg("--use_gpu",
+                        type=bool,
+                        default=False,
+                        help="Whether use gpu.")
+    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)
+
+    args.warmup_manifest = config.data.test_manifest
+    print_arguments(args)
+
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
+
+    main(config, args)

deepspeech/exps/deepspeech2/bin/deploy/send.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.
+"""Socket client to send wav to ASR server."""
+import struct
+import socket
+import argparse
+import wave
+
+from deepspeech.utils.socket_server import socket_send
+
+parser = argparse.ArgumentParser(description=__doc__)
+parser.add_argument(
+    "--host_ip",
+    default="localhost",
+    type=str,
+    help="Server IP address. (default: %(default)s)")
+parser.add_argument(
+    "--host_port",
+    default=8086,
+    type=int,
+    help="Server Port. (default: %(default)s)")
+args = parser.parse_args()
+
+WAVE_OUTPUT_FILENAME = "output.wav"
+
+
+def main():
+    wf = wave.open(WAVE_OUTPUT_FILENAME, 'rb')
+    nframe = wf.getnframes()
+    data = wf.readframes(nframe)
+    print(f"Wave: {WAVE_OUTPUT_FILENAME}")
+    print(f"Wave samples: {nframe}")
+    print(f"Wave channels: {wf.getnchannels()}")
+    print(f"Wave sample rate: {wf.getframerate()}")
+    print(f"Wave sample width: {wf.getsampwidth()}")
+    assert isinstance(data, bytes)
+    socket_send(args.host_ip, args.host_port, data)
+
+
+if __name__ == "__main__":
+    main()

deepspeech/exps/deepspeech2/bin/deploy/server.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.
+"""Server-end for the ASR demo."""
+import os
+import time
+import argparse
+import functools
+import paddle
+import numpy as np
+
+from deepspeech.utils.socket_server import warm_up_test
+from deepspeech.utils.socket_server import AsrTCPServer
+from deepspeech.utils.socket_server import AsrRequestHandler
+
+from deepspeech.training.cli import default_argument_parser
+from deepspeech.exps.deepspeech2.config import get_cfg_defaults
+
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.utils.utility import add_arguments, print_arguments
+
+from deepspeech.models.deepspeech2 import DeepSpeech2Model
+from deepspeech.io.dataset import ManifestDataset
+
+
+def start_server(config, args):
+    """Start the ASR server"""
+    dataset = ManifestDataset(
+        config.data.test_manifest,
+        config.data.vocab_filepath,
+        config.data.mean_std_filepath,
+        augmentation_config="{}",
+        max_duration=config.data.max_duration,
+        min_duration=config.data.min_duration,
+        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,
+        use_dB_normalization=config.data.use_dB_normalization,
+        target_dB=config.data.target_dB,
+        random_seed=config.data.random_seed,
+        keep_transcription_text=True)
+    model = DeepSpeech2Model.from_pretrained(dataset, config,
+                                             args.checkpoint_path)
+    model.eval()
+
+    # prepare ASR inference handler
+    def file_to_transcript(filename):
+        feature = dataset.process_utterance(filename, "")
+        audio = np.array([feature[0]]).astype('float32')  #[1, D, T]
+        audio_len = feature[0].shape[1]
+        audio_len = np.array([audio_len]).astype('int64')  # [1]
+
+        result_transcript = model.decode(
+            paddle.to_tensor(audio),
+            paddle.to_tensor(audio_len),
+            vocab_list=dataset.vocab_list,
+            decoding_method=config.decoding.decoding_method,
+            lang_model_path=config.decoding.lang_model_path,
+            beam_alpha=config.decoding.alpha,
+            beam_beta=config.decoding.beta,
+            beam_size=config.decoding.beam_size,
+            cutoff_prob=config.decoding.cutoff_prob,
+            cutoff_top_n=config.decoding.cutoff_top_n,
+            num_processes=config.decoding.num_proc_bsearch)
+        return result_transcript[0]
+
+    # warming up with utterrances sampled from Librispeech
+    print('-----------------------------------------------------------')
+    print('Warming up ...')
+    warm_up_test(
+        audio_process_handler=file_to_transcript,
+        manifest_path=args.warmup_manifest,
+        num_test_cases=3)
+    print('-----------------------------------------------------------')
+
+    # start the server
+    server = AsrTCPServer(
+        server_address=(args.host_ip, args.host_port),
+        RequestHandlerClass=AsrRequestHandler,
+        speech_save_dir=args.speech_save_dir,
+        audio_process_handler=file_to_transcript)
+    print("ASR Server Started.")
+    server.serve_forever()
+
+
+def main(config, args):
+    start_server(config, args)
+
+
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    add_arg = functools.partial(add_arguments, argparser=parser)
+    # yapf: disable
+    add_arg('host_ip',          str,
+            'localhost',
+            "Server's IP address.")
+    add_arg('host_port',        int,    8086,    "Server's IP port.")
+    add_arg('speech_save_dir',  str,
+            'demo_cache',
+            "Directory to save demo audios.")
+    add_arg('warmup_manifest',  str, None, "Filepath of manifest to warm up.")
+    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)
+
+    args.warmup_manifest = config.data.test_manifest
+    print_arguments(args)
+
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
+
+    main(config, args)

deepspeech/exps/deepspeech2/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 DeepSpeech2 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.deepspeech2.config import get_cfg_defaults
+from deepspeech.exps.deepspeech2.model import DeepSpeech2Tester 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/deepspeech2/bin/infer.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.
+"""Inferer for DeepSpeech2 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.deepspeech2.config import get_cfg_defaults
+from deepspeech.exps.deepspeech2.model import DeepSpeech2Tester 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/deepspeech2/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 DeepSpeech2 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.deepspeech2.config import get_cfg_defaults
+from deepspeech.exps.deepspeech2.model import DeepSpeech2Tester 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/deepspeech2/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 DeepSpeech2 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.deepspeech2.config import get_cfg_defaults
+from deepspeech.exps.deepspeech2.model import DeepSpeech2Trainer 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)

tools/tune.py → deepspeech/exps/deepspeech2/bin/tune.py

@@ -20,105 +20,60 @@ import argparse
 import functools
 import gzip
 import logging
-import paddle.fluid as fluid
-import _init_paths
-from data_utils.data import DataGenerator
-from model_utils.model import DeepSpeech2Model
-from utils.error_rate import char_errors, word_errors
-from utils.utility import add_arguments, print_arguments
-
-parser = argparse.ArgumentParser(description=__doc__)
-add_arg = functools.partial(add_arguments, argparser=parser)
-# yapf: disable
-add_arg('num_batches',      int,    -1,     "# of batches tuning on. "
-                                            "Default -1, on whole dev set.")
-add_arg('batch_size',       int,    256,    "# of samples per batch.")
-add_arg('trainer_count',    int,    8,      "# of Trainers (CPUs or GPUs).")
-add_arg('beam_size',        int,    500,    "Beam search width.")
-add_arg('num_proc_bsearch', int,    8,     "# of CPUs for beam search.")
-add_arg('num_conv_layers',  int,    2,      "# of convolution layers.")
-add_arg('num_rnn_layers',   int,    3,      "# of recurrent layers.")
-add_arg('rnn_layer_size',   int,    2048,   "# of recurrent cells per layer.")
-add_arg('num_alphas',       int,    45,     "# of alpha candidates for tuning.")
-add_arg('num_betas',        int,    8,      "# of beta candidates for tuning.")
-add_arg('alpha_from',       float,  1.0,    "Where alpha starts tuning from.")
-add_arg('alpha_to',         float,  3.2,    "Where alpha ends tuning with.")
-add_arg('beta_from',        float,  0.1,    "Where beta starts tuning from.")
-add_arg('beta_to',          float,  0.45,   "Where beta ends tuning with.")
-add_arg('cutoff_prob',      float,  1.0,    "Cutoff probability for pruning.")
-add_arg('cutoff_top_n',     int,    40,     "Cutoff number for pruning.")
-add_arg('use_gru',          bool,   False,  "Use GRUs instead of simple RNNs.")
-add_arg('use_gpu',          bool,   True,   "Use GPU or not.")
-add_arg('share_rnn_weights',bool,   True,   "Share input-hidden weights across "
-                                            "bi-directional RNNs. Not for GRU.")
-add_arg('tune_manifest',    str,
-        'data/librispeech/manifest.dev-clean',
-        "Filepath of manifest to tune.")
-add_arg('mean_std_path',    str,
-        'data/librispeech/mean_std.npz',
-        "Filepath of normalizer's mean & std.")
-add_arg('vocab_path',       str,
-        'data/librispeech/vocab.txt',
-        "Filepath of vocabulary.")
-add_arg('lang_model_path',  str,
-        'models/lm/common_crawl_00.prune01111.trie.klm',
-        "Filepath for language model.")
-add_arg('model_path',       str,
-        './checkpoints/libri/params.latest.tar.gz',
-        "If None, the training starts from scratch, "
-        "otherwise, it resumes from the pre-trained model.")
-add_arg('error_rate_type',  str,
-        'wer',
-        "Error rate type for evaluation.",
-        choices=['wer', 'cer'])
-add_arg('specgram_type',    str,
-        'linear',
-        "Audio feature type. Options: linear, mfcc.",
-        choices=['linear', 'mfcc'])
-# yapf: disable
-args = parser.parse_args()
-
-
-def tune():
+
+from paddle.io import DataLoader
+
+from deepspeech.utils import error_rate
+from deepspeech.utils.utility import add_arguments, print_arguments
+
+from deepspeech.models.deepspeech2 import DeepSpeech2Model
+from deepspeech.io.collator import SpeechCollator
+from deepspeech.io.dataset import ManifestDataset
+
+from deepspeech.training.cli import default_argument_parser
+from deepspeech.exps.deepspeech2.config import get_cfg_defaults
+
+
+def tune(config, args):
     """Tune parameters alpha and beta incrementally."""
     if not args.num_alphas >= 0:
         raise ValueError("num_alphas must be non-negative!")
     if not args.num_betas >= 0:
         raise ValueError("num_betas must be non-negative!")
 
-    if args.use_gpu:
-        place = fluid.CUDAPlace(0)
-    else:
-        place = fluid.CPUPlace()
-
-    data_generator = DataGenerator(
-        vocab_filepath=args.vocab_path,
-        mean_std_filepath=args.mean_std_path,
-        augmentation_config='{}',
-        specgram_type=args.specgram_type,
-        keep_transcription_text=True,
-        place = place,
-        is_training = False)
-
-    batch_reader = data_generator.batch_reader_creator(
-        manifest_path=args.tune_manifest,
-        batch_size=args.batch_size,
-        sortagrad=False,
-        shuffle_method=None)
-
-    ds2_model = DeepSpeech2Model(
-        vocab_size=data_generator.vocab_size,
-        num_conv_layers=args.num_conv_layers,
-        num_rnn_layers=args.num_rnn_layers,
-        rnn_layer_size=args.rnn_layer_size,
-        use_gru=args.use_gru,
-        place=place,
-        init_from_pretrained_model=args.model_path,
-        share_rnn_weights=args.share_rnn_weights)
+    dev_dataset = ManifestDataset(
+        config.data.dev_manifest,
+        config.data.vocab_filepath,
+        config.data.mean_std_filepath,
+        augmentation_config="{}",
+        max_duration=config.data.max_duration,
+        min_duration=config.data.min_duration,
+        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,
+        use_dB_normalization=config.data.use_dB_normalization,
+        target_dB=config.data.target_dB,
+        random_seed=config.data.random_seed,
+        keep_transcription_text=True)
+
+    valid_loader = DataLoader(
+        dev_dataset,
+        batch_size=config.data.batch_size,
+        shuffle=False,
+        drop_last=False,
+        collate_fn=SpeechCollator(is_training=False))
+
+    model = DeepSpeech2Model.from_pretrained(dev_dataset, config,
+                                             args.checkpoint_path)
+    model.eval()
 
     # decoders only accept string encoded in utf-8
-    vocab_list = [chars for chars in data_generator.vocab_list]
-    errors_func = char_errors if args.error_rate_type == 'cer' else word_errors
+    vocab_list = valid_loader.dataset.vocab_list
+    errors_func = error_rate.char_errors if config.decoding.error_rate_type == 'cer' else error_rate.word_errors
+
     # create grid for search
     cand_alphas = np.linspace(args.alpha_from, args.alpha_to, args.num_alphas)
     cand_betas = np.linspace(args.beta_from, args.beta_to, args.num_betas)
@@ -127,36 +82,50 @@ def tune():
 
     err_sum = [0.0 for i in range(len(params_grid))]
     err_ave = [0.0 for i in range(len(params_grid))]
+
     num_ins, len_refs, cur_batch = 0, 0, 0
     # initialize external scorer
-    ds2_model.init_ext_scorer(args.alpha_from, args.beta_from,
-                              args.lang_model_path, vocab_list)
+    model.decoder.init_decode(args.alpha_from, args.beta_from,
+                              config.decoding.lang_model_path, vocab_list,
+                              config.decoding.decoding_method)
     ## incremental tuning parameters over multiple batches
-    ds2_model.logger.info("start tuning ...")
-    for infer_data in batch_reader():
+    print("start tuning ...")
+    for infer_data in valid_loader():
         if (args.num_batches >= 0) and (cur_batch >= args.num_batches):
             break
-        probs_split = ds2_model.infer_batch_probs(
-            infer_data=infer_data,
-            feeding_dict=data_generator.feeding)
-        target_transcripts = infer_data[1]
 
-        num_ins += len(target_transcripts)
+        def ordid2token(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
+
+        audio, text, audio_len, text_len = infer_data
+        target_transcripts = ordid2token(text, text_len)
+        num_ins += audio.shape[0]
+
+        # model infer
+        eouts, eouts_len = model.encoder(audio, audio_len)
+        probs = model.decoder.probs(eouts)
+
         # grid search
         for index, (alpha, beta) in enumerate(params_grid):
-            result_transcripts = ds2_model.decode_batch_beam_search(
-                probs_split=probs_split,
-                beam_alpha=alpha,
-                beam_beta=beta,
-                beam_size=args.beam_size,
-                cutoff_prob=args.cutoff_prob,
-                cutoff_top_n=args.cutoff_top_n,
-                vocab_list=vocab_list,
-                num_processes=args.num_proc_bsearch)
+            print(f"tuneing: alpha={alpha} beta={beta}")
+            result_transcripts = model.decoder.decode_probs(
+                probs.numpy(), eouts_len, vocab_list,
+                config.decoding.decoding_method,
+                config.decoding.lang_model_path, alpha, beta,
+                config.decoding.beam_size, config.decoding.cutoff_prob,
+                config.decoding.cutoff_top_n, config.decoding.num_proc_bsearch)
+
             for target, result in zip(target_transcripts, result_transcripts):
                 errors, len_ref = errors_func(target, result)
                 err_sum[index] += errors
-                # accumulate the length of references of every batch
+
+                # accumulate the length of references of every batchπ
                 # in the first iteration
                 if args.alpha_from == alpha and args.beta_from == beta:
                     len_refs += len_ref
@@ -165,37 +134,77 @@ def tune():
             if index % 2 == 0:
                 sys.stdout.write('.')
                 sys.stdout.flush()
+            print(f"tuneing: one grid done!")
 
         # output on-line tuning result at the end of current batch
         err_ave_min = min(err_ave)
         min_index = err_ave.index(err_ave_min)
         print("\nBatch %d [%d/?], current opt (alpha, beta) = (%s, %s), "
-              " min [%s] = %f" %(cur_batch, num_ins,
-              "%.3f" % params_grid[min_index][0],
-              "%.3f" % params_grid[min_index][1],
-              args.error_rate_type, err_ave_min))
+              " min [%s] = %f" %
+              (cur_batch, num_ins, "%.3f" % params_grid[min_index][0],
+               "%.3f" % params_grid[min_index][1],
+               config.decoding.error_rate_type, err_ave_min))
         cur_batch += 1
 
     # output WER/CER at every (alpha, beta)
-    print("\nFinal %s:\n" % args.error_rate_type)
+    print("\nFinal %s:\n" % config.decoding.error_rate_type)
     for index in range(len(params_grid)):
-        print("(alpha, beta) = (%s, %s), [%s] = %f"
-             % ("%.3f" % params_grid[index][0], "%.3f" % params_grid[index][1],
-             args.error_rate_type, err_ave[index]))
+        print("(alpha, beta) = (%s, %s), [%s] = %f" %
+              ("%.3f" % params_grid[index][0], "%.3f" % params_grid[index][1],
+               config.decoding.error_rate_type, err_ave[index]))
 
     err_ave_min = min(err_ave)
     min_index = err_ave.index(err_ave_min)
-    print("\nFinish tuning on %d batches, final opt (alpha, beta) = (%s, %s)"
-            % (cur_batch, "%.3f" % params_grid[min_index][0],
-              "%.3f" % params_grid[min_index][1]))
+    print("\nFinish tuning on %d batches, final opt (alpha, beta) = (%s, %s)" %
+          (cur_batch, "%.3f" % params_grid[min_index][0],
+           "%.3f" % params_grid[min_index][1]))
+
+    print("finish tuning")
+
 
-    ds2_model.logger.info("finish tuning")
+def main(config, args):
+    tune(config, args)
 
 
-def main():
+if __name__ == "__main__":
+    parser = default_argument_parser()
+    add_arg = functools.partial(add_arguments, argparser=parser)
+    add_arg('num_batches', int, -1, "# of batches tuning on. "
+            "Default -1, on whole dev set.")
+    add_arg('num_alphas', int, 45, "# of alpha candidates for tuning.")
+    add_arg('num_betas', int, 8, "# of beta candidates for tuning.")
+    add_arg('alpha_from', float, 1.0, "Where alpha starts tuning from.")
+    add_arg('alpha_to', float, 3.2, "Where alpha ends tuning with.")
+    add_arg('beta_from', float, 0.1, "Where beta starts tuning from.")
+    add_arg('beta_to', float, 0.45, "Where beta ends tuning with.")
+
+    add_arg('batch_size', int, 256, "# of samples per batch.")
+    add_arg('beam_size', int, 500, "Beam search width.")
+    add_arg('num_proc_bsearch', int, 8, "# of CPUs for beam search.")
+    add_arg('cutoff_prob', float, 1.0, "Cutoff probability for pruning.")
+    add_arg('cutoff_top_n', int, 40, "Cutoff number for pruning.")
+
+    args = parser.parse_args()
     print_arguments(args)
-    tune()
 
+    # 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.data.batch_size = args.batch_size
+    config.decoding.beam_size = args.beam_size
+    config.decoding.num_proc_bsearch = args.num_proc_bsearch
+    config.decoding.cutoff_prob = args.cutoff_prob
+    config.decoding.cutoff_top_n = args.cutoff_top_n
+
+    config.freeze()
+    print(config)
+
+    if args.dump_config:
+        with open(args.dump_config, 'w') as f:
+            print(config, file=f)
 
-if __name__ == '__main__':
-    main()
+    main(config, args)

deepspeech/exps/deepspeech2/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 as CN
+from deepspeech.models.deepspeech2 import DeepSpeech2Model
+
+_C = CN()
+_C.data = CN(
+    dict(
+        train_manifest="",
+        dev_manifest="",
+        test_manifest="",
+        vocab_filepath="",
+        mean_std_filepath="",
+        augmentation_config="",
+        max_duration=float('inf'),
+        min_duration=0.0,
+        stride_ms=10.0,  # ms
+        window_ms=20.0,  # ms
+        n_fft=None,  # fft points
+        max_freq=None,  # None for samplerate/2
+        specgram_type='linear',  # 'linear', 'mfcc'
+        target_sample_rate=16000,  # 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'
+    ))
+
+_C.model = CN(
+    dict(
+        num_conv_layers=2,  #Number of stacking convolution layers.
+        num_rnn_layers=3,  #Number of stacking RNN layers.
+        rnn_layer_size=1024,  #RNN layer size (number of RNN cells).
+        use_gru=True,  #Use gru if set True. Use simple rnn if set False.
+        share_rnn_weights=True  #Whether to share input-hidden weights between forward and backward directional RNNs.Notice that for GRU, weight sharing is not supported.
+    ))
+
+DeepSpeech2Model.params(_C.model)
+
+_C.training = CN(
+    dict(
+        lr=5e-4,  # learning rate
+        lr_decay=1.0,  # learning rate decay
+        weight_decay=1e-6,  # the coeff of weight decay
+        global_grad_clip=5.0,  # the global norm clip
+        n_epoch=50,  # train epochs
+    ))
+
+_C.decoding = CN(
+    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
+    ))
+
+
+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()

data_utils/augmentor/augmentation.py → deepspeech/frontend/augmentor/augmentation.py

@@ -15,17 +15,17 @@
 
 import json
 import random
-from data_utils.augmentor.volume_perturb import VolumePerturbAugmentor
-from data_utils.augmentor.shift_perturb import ShiftPerturbAugmentor
-from data_utils.augmentor.speed_perturb import SpeedPerturbAugmentor
-from data_utils.augmentor.noise_perturb import NoisePerturbAugmentor
-from data_utils.augmentor.impulse_response import ImpulseResponseAugmentor
-from data_utils.augmentor.resample import ResampleAugmentor
-from data_utils.augmentor.online_bayesian_normalization import \
+from deepspeech.frontend.augmentor.volume_perturb import VolumePerturbAugmentor
+from deepspeech.frontend.augmentor.shift_perturb import ShiftPerturbAugmentor
+from deepspeech.frontend.augmentor.speed_perturb import SpeedPerturbAugmentor
+from deepspeech.frontend.augmentor.noise_perturb import NoisePerturbAugmentor
+from deepspeech.frontend.augmentor.impulse_response import ImpulseResponseAugmentor
+from deepspeech.frontend.augmentor.resample import ResampleAugmentor
+from deepspeech.frontend.augmentor.online_bayesian_normalization import \
      OnlineBayesianNormalizationAugmentor
 
 
-class AugmentationPipeline(object):
+class AugmentationPipeline():
     """Build a pre-processing pipeline with various augmentation models.Such a
     data augmentation pipeline is oftern leveraged to augment the training
     samples to make the model invariant to certain types of perturbations in the

data_utils/augmentor/base.py → deepspeech/frontend/augmentor/base.py

@@ -16,7 +16,7 @@
 from abc import ABCMeta, abstractmethod
 
 
-class AugmentorBase(object):
+class AugmentorBase():
     """Abstract base class for augmentation model (augmentor) class.
     All augmentor classes should inherit from this class, and implement the
     following abstract methods.

data_utils/augmentor/impulse_response.py → deepspeech/frontend/augmentor/impulse_response.py

@@ -13,9 +13,9 @@
 # limitations under the License.
 """Contains the impulse response augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
-from data_utils.utility import read_manifest
-from data_utils.audio import AudioSegment
+from deepspeech.frontend.augmentor.base import AugmentorBase
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.frontend.audio import AudioSegment
 
 
 class ImpulseResponseAugmentor(AugmentorBase):

data_utils/augmentor/noise_perturb.py → deepspeech/frontend/augmentor/noise_perturb.py

@@ -13,9 +13,9 @@
 # limitations under the License.
 """Contains the noise perturb augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
-from data_utils.utility import read_manifest
-from data_utils.audio import AudioSegment
+from deepspeech.frontend.augmentor.base import AugmentorBase
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.frontend.audio import AudioSegment
 
 
 class NoisePerturbAugmentor(AugmentorBase):

data_utils/augmentor/online_bayesian_normalization.py → deepspeech/frontend/augmentor/online_bayesian_normalization.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Contain the online bayesian normalization augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
+from deepspeech.frontend.augmentor.base import AugmentorBase
 
 
 class OnlineBayesianNormalizationAugmentor(AugmentorBase):

data_utils/augmentor/resample.py → deepspeech/frontend/augmentor/resample.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Contain the resample augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
+from deepspeech.frontend.augmentor.base import AugmentorBase
 
 
 class ResampleAugmentor(AugmentorBase):

data_utils/augmentor/shift_perturb.py → deepspeech/frontend/augmentor/shift_perturb.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Contains the volume perturb augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
+from deepspeech.frontend.augmentor.base import AugmentorBase
 
 
 class ShiftPerturbAugmentor(AugmentorBase):

data_utils/augmentor/speed_perturb.py → deepspeech/frontend/augmentor/speed_perturb.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Contain the speech perturbation augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
+from deepspeech.frontend.augmentor.base import AugmentorBase
 
 
 class SpeedPerturbAugmentor(AugmentorBase):

data_utils/augmentor/volume_perturb.py → deepspeech/frontend/augmentor/volume_perturb.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Contains the volume perturb augmentation model."""
 
-from data_utils.augmentor.base import AugmentorBase
+from deepspeech.frontend.augmentor.base import AugmentorBase
 
 
 class VolumePerturbAugmentor(AugmentorBase):

deepspeech/frontend/featurizer/__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.

data_utils/featurizer/audio_featurizer.py → deepspeech/frontend/featurizer/audio_featurizer.py

@@ -14,8 +14,8 @@
 """Contains the audio featurizer class."""
 
 import numpy as np
-from data_utils.utility import read_manifest
-from data_utils.audio import AudioSegment
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.frontend.audio import AudioSegment
 from python_speech_features import mfcc
 from python_speech_features import delta
 
@@ -52,6 +52,7 @@ class AudioFeaturizer(object):
                  specgram_type='linear',
                  stride_ms=10.0,
                  window_ms=20.0,
+                 n_fft=None,
                  max_freq=None,
                  target_sample_rate=16000,
                  use_dB_normalization=True,
@@ -63,6 +64,7 @@ class AudioFeaturizer(object):
         self._target_sample_rate = target_sample_rate
         self._use_dB_normalization = use_dB_normalization
         self._target_dB = target_dB
+        self._fft_point = n_fft
 
     def featurize(self,
                   audio_segment,
@@ -98,6 +100,22 @@ class AudioFeaturizer(object):
         return self._compute_specgram(audio_segment.samples,
                                       audio_segment.sample_rate)
 
+    @property
+    def feature_size(self):
+        """audio feature size"""
+        feat_dim = 0
+        if self._specgram_type == 'linear':
+            fft_point = self._window_ms if self._fft_point is None else self._fft_point
+            feat_dim = int(fft_point * (self._target_sample_rate / 1000) / 2 +
+                           1)
+        elif self._specgram_type == 'mfcc':
+            # mfcc,delta, delta-delta
+            feat_dim = int(13 * 3)
+        else:
+            raise ValueError("Unknown specgram_type %s. "
+                             "Supported values: linear." % self._specgram_type)
+        return feat_dim
+
     def _compute_specgram(self, samples, sample_rate):
         """Extract various audio features."""
         if self._specgram_type == 'linear':
@@ -150,7 +168,8 @@ class AudioFeaturizer(object):
             windows[:, 1] == samples[stride_size:(stride_size + window_size)])
         # window weighting, squared Fast Fourier Transform (fft), scaling
         weighting = np.hanning(window_size)[:, None]
-        fft = np.fft.rfft(windows * weighting, axis=0)
+        # https://numpy.org/doc/stable/reference/generated/numpy.fft.rfft.html
+        fft = np.fft.rfft(windows * weighting, n=None, axis=0)
         fft = np.absolute(fft)
         fft = fft**2
         scale = np.sum(weighting**2) * sample_rate

data_utils/featurizer/speech_featurizer.py → deepspeech/frontend/featurizer/speech_featurizer.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 """Contains the speech featurizer class."""
 
-from data_utils.featurizer.audio_featurizer import AudioFeaturizer
-from data_utils.featurizer.text_featurizer import TextFeaturizer
+from deepspeech.frontend.featurizer.audio_featurizer import AudioFeaturizer
+from deepspeech.frontend.featurizer.text_featurizer import TextFeaturizer
 
 
 class SpeechFeaturizer(object):
@@ -56,6 +56,7 @@ class SpeechFeaturizer(object):
                  specgram_type='linear',
                  stride_ms=10.0,
                  window_ms=20.0,
+                 n_fft=None,
                  max_freq=None,
                  target_sample_rate=16000,
                  use_dB_normalization=True,
@@ -64,6 +65,7 @@ class SpeechFeaturizer(object):
             specgram_type=specgram_type,
             stride_ms=stride_ms,
             window_ms=window_ms,
+            n_fft=n_fft,
             max_freq=max_freq,
             target_sample_rate=target_sample_rate,
             use_dB_normalization=use_dB_normalization,
@@ -106,3 +108,12 @@ class SpeechFeaturizer(object):
         :rtype: list
         """
         return self._text_featurizer.vocab_list
+
+    @property
+    def feature_size(self):
+        """Return the audio feature size.
+
+        :return: audio feature size.
+        :rtype: int
+        """
+        return self._audio_featurizer.feature_size
\ No newline at end of file

data_utils/featurizer/text_featurizer.py → deepspeech/frontend/featurizer/text_featurizer.py

@@ -30,6 +30,7 @@ class TextFeaturizer(object):
     """
 
     def __init__(self, vocab_filepath):
+        self.unk = '<unk>'
         self._vocab_dict, self._vocab_list = self._load_vocabulary_from_file(
             vocab_filepath)
 
@@ -43,7 +44,11 @@ class TextFeaturizer(object):
         :rtype: list
         """
         tokens = self._char_tokenize(text)
-        return [self._vocab_dict[token] for token in tokens]
+        ids = []
+        for token in tokens:
+            token = token if token in self._vocab_dict else self.unk
+            ids.append(self._vocab_dict[token])
+        return ids
 
     @property
     def vocab_size(self):

data_utils/normalizer.py → deepspeech/frontend/normalizer.py

@@ -15,8 +15,8 @@
 
 import numpy as np
 import random
-from data_utils.utility import read_manifest
-from data_utils.audio import AudioSegment
+from deepspeech.frontend.utility import read_manifest
+from deepspeech.frontend.audio import AudioSegment
 
 
 class FeatureNormalizer(object):

data_utils/speech.py → deepspeech/frontend/speech.py

@@ -14,28 +14,33 @@
 """Contains the speech segment class."""
 
 import numpy as np
-from data_utils.audio import AudioSegment
+from deepspeech.frontend.audio import AudioSegment
 
 
 class SpeechSegment(AudioSegment):
-    """Speech segment abstraction, a subclass of AudioSegment,
-    with an additional transcript.
-
-    :param samples: Audio samples [num_samples x num_channels].
-    :type samples: ndarray.float32
-    :param sample_rate: Audio sample rate.
-    :type sample_rate: int
-    :param transcript: Transcript text for the speech.
-    :type transript: str
-    :raises TypeError: If the sample data type is not float or int.
+    """Speech Segment with Text
+
+    Args:
+        AudioSegment (AudioSegment): Audio Segment
     """
 
     def __init__(self, samples, sample_rate, transcript):
+        """Speech segment abstraction, a subclass of AudioSegment,
+            with an additional transcript.
+
+        Args:
+            samples (ndarray.float32): Audio samples [num_samples x num_channels].
+            sample_rate (int): Audio sample rate.
+            transcript (str): Transcript text for the speech.
+        """
         AudioSegment.__init__(self, samples, sample_rate)
         self._transcript = transcript
 
     def __eq__(self, other):
         """Return whether two objects are equal.
+
+        Returns:
+            bool: True, when equal to other
         """
         if not AudioSegment.__eq__(self, other):
             return False

data_utils/utility.py → deepspeech/frontend/utility.py

@@ -20,6 +20,7 @@ import tarfile
 import time
 from threading import Thread
 from multiprocessing import Process, Manager, Value
+
 from paddle.dataset.common import md5file
 
 
@@ -49,51 +50,3 @@ def read_manifest(manifest_path, max_duration=float('inf'), min_duration=0.0):
                 json_data["duration"] >= min_duration):
             manifest.append(json_data)
     return manifest
-
-
-def getfile_insensitive(path):
-    """Get the actual file path when given insensitive filename."""
-    directory, filename = os.path.split(path)
-    directory, filename = (directory or '.'), filename.lower()
-    for f in os.listdir(directory):
-        newpath = os.path.join(directory, f)
-        if os.path.isfile(newpath) and f.lower() == filename:
-            return newpath
-
-
-def download_multi(url, target_dir, extra_args):
-    """Download multiple files from url to target_dir."""
-    if not os.path.exists(target_dir): os.makedirs(target_dir)
-    print("Downloading %s ..." % url)
-    ret_code = os.system("wget -c " + url + ' ' + extra_args + " -P " +
-                         target_dir)
-    return ret_code
-
-
-def download(url, md5sum, target_dir):
-    """Download file from url to target_dir, and check md5sum."""
-    if not os.path.exists(target_dir): os.makedirs(target_dir)
-    filepath = os.path.join(target_dir, url.split("/")[-1])
-    if not (os.path.exists(filepath) and md5file(filepath) == md5sum):
-        print("Downloading %s ..." % url)
-        os.system("wget -c " + url + " -P " + target_dir)
-        print("\nMD5 Chesksum %s ..." % filepath)
-        if not md5file(filepath) == md5sum:
-            raise RuntimeError("MD5 checksum failed.")
-    else:
-        print("File exists, skip downloading. (%s)" % filepath)
-    return filepath
-
-
-def unpack(filepath, target_dir, rm_tar=False):
-    """Unpack the file to the target_dir."""
-    print("Unpacking %s ..." % filepath)
-    tar = tarfile.open(filepath)
-    tar.extractall(target_dir)
-    tar.close()
-    if rm_tar == True:
-        os.remove(filepath)
-
-
-class XmapEndSignal():
-    pass

deepspeech/models/__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/modules/__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/training/__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.
+
+from deepspeech.training.trainer import *