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PaddleSpeech/paddlespeech/server/engine/text/python/text_engine.py

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# Copyright (c) 2022 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 collections import OrderedDict
import paddle
from paddlespeech.cli.log import logger
from paddlespeech.cli.text.infer import TextExecutor
from paddlespeech.server.engine.base_engine import BaseEngine
class PaddleTextConnectionHandler:
def __init__(self, text_engine):
"""The PaddleSpeech Text Server Connection Handler
This connection process every server request
Args:
text_engine (TextEngine): The Text engine
"""
super().__init__()
logger.debug(
"Create PaddleTextConnectionHandler to process the text request")
self.text_engine = text_engine
self.task = self.text_engine.executor.task
self.model = self.text_engine.executor.model
self.tokenizer = self.text_engine.executor.tokenizer
self._punc_list = self.text_engine.executor._punc_list
self._inputs = OrderedDict()
self._outputs = OrderedDict()
@paddle.no_grad()
def run(self, text):
"""The connection process the request text
Args:
text (str): the request text
Returns:
str: the punctuation text
"""
self.preprocess(text)
self.infer()
res = self.postprocess()
return res
@paddle.no_grad()
def preprocess(self, text):
"""
Input preprocess and return paddle.Tensor stored in self.input.
Input content can be a text(tts), a file(asr, cls) or a streaming(not supported yet).
Args:
text (str): the request text
"""
if self.task == 'punc':
clean_text = self.text_engine.executor._clean_text(text)
assert len(clean_text) > 0, f'Invalid input string: {text}'
tokenized_input = self.tokenizer(
list(clean_text), return_length=True, is_split_into_words=True)
self._inputs['input_ids'] = tokenized_input['input_ids']
self._inputs['seg_ids'] = tokenized_input['token_type_ids']
self._inputs['seq_len'] = tokenized_input['seq_len']
else:
raise NotImplementedError
@paddle.no_grad()
def infer(self):
"""Model inference and result stored in self.output.
"""
if self.task == 'punc':
input_ids = paddle.to_tensor(self._inputs['input_ids']).unsqueeze(0)
seg_ids = paddle.to_tensor(self._inputs['seg_ids']).unsqueeze(0)
logits, _ = self.model(input_ids, seg_ids)
preds = paddle.argmax(logits, axis=-1).squeeze(0)
self._outputs['preds'] = preds
else:
raise NotImplementedError
def postprocess(self):
"""Output postprocess and return human-readable results such as texts and audio files.
Returns:
str: The punctuation text
"""
if self.task == 'punc':
input_ids = self._inputs['input_ids']
seq_len = self._inputs['seq_len']
preds = self._outputs['preds']
tokens = self.tokenizer.convert_ids_to_tokens(
input_ids[1:seq_len - 1])
labels = preds[1:seq_len - 1].tolist()
assert len(tokens) == len(labels)
text = ''
for t, l in zip(tokens, labels):
text += t
if l != 0: # Non punc.
text += self._punc_list[l]
return text
else:
raise NotImplementedError
class TextServerExecutor(TextExecutor):
def __init__(self):
"""The wrapper for TextEcutor
"""
super().__init__()
pass
class TextEngine(BaseEngine):
def __init__(self):
"""The Text Engine
"""
super(TextEngine, self).__init__()
logger.debug("Create the TextEngine Instance")
def init(self, config: dict):
"""Init the Text Engine
Args:
config (dict): The server configuation
Returns:
bool: The engine instance flag
"""
logger.debug("Init the text engine")
try:
self.config = config
if self.config.device:
self.device = self.config.device
else:
self.device = paddle.get_device()
paddle.set_device(self.device)
logger.debug(f"Text Engine set the device: {self.device}")
except BaseException as e:
logger.error(
"Set device failed, please check if device is already used and the parameter 'device' in the yaml file"
)
logger.error("Initialize Text server engine Failed on device: %s." %
(self.device))
return False
self.executor = TextServerExecutor()
self.executor._init_from_path(
task=config.task,
model_type=config.model_type,
lang=config.lang,
cfg_path=config.cfg_path,
ckpt_path=config.ckpt_path,
vocab_file=config.vocab_file)
logger.info("Initialize Text server engine successfully on device: %s."
% (self.device))
return True