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PaddleSpeech/paddlespeech/server/engine/asr/paddleinference/asr_engine.py

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8.8 KiB

# 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.
import io
import os
from typing import Optional
import paddle
from yacs.config import CfgNode
from paddlespeech.cli.asr.infer import ASRExecutor
from paddlespeech.cli.log import logger
from paddlespeech.cli.utils import MODEL_HOME
from paddlespeech.s2t.frontend.featurizer.text_featurizer import TextFeaturizer
from paddlespeech.s2t.modules.ctc import CTCDecoder
from paddlespeech.s2t.utils.utility import UpdateConfig
from paddlespeech.server.engine.base_engine import BaseEngine
from paddlespeech.server.utils.config import get_config
from paddlespeech.server.utils.paddle_predictor import init_predictor
from paddlespeech.server.utils.paddle_predictor import run_model
__all__ = ['ASREngine']
pretrained_models = {
"deepspeech2offline_aishell-zh-16k": {
'url':
'https://paddlespeech.bj.bcebos.com/s2t/aishell/asr0/asr0_deepspeech2_aishell_ckpt_0.1.1.model.tar.gz',
'md5':
'932c3593d62fe5c741b59b31318aa314',
'cfg_path':
'model.yaml',
'ckpt_path':
'exp/deepspeech2/checkpoints/avg_1',
'model':
'exp/deepspeech2/checkpoints/avg_1.jit.pdmodel',
'params':
'exp/deepspeech2/checkpoints/avg_1.jit.pdiparams',
'lm_url':
'https://deepspeech.bj.bcebos.com/zh_lm/zh_giga.no_cna_cmn.prune01244.klm',
'lm_md5':
'29e02312deb2e59b3c8686c7966d4fe3'
},
}
class ASRServerExecutor(ASRExecutor):
def __init__(self):
super().__init__()
pass
def _init_from_path(self,
model_type: str='wenetspeech',
am_model: Optional[os.PathLike]=None,
am_params: Optional[os.PathLike]=None,
lang: str='zh',
sample_rate: int=16000,
cfg_path: Optional[os.PathLike]=None,
decode_method: str='attention_rescoring',
am_predictor_conf: dict=None):
"""
Init model and other resources from a specific path.
"""
if cfg_path is None or am_model is None or am_params is None:
sample_rate_str = '16k' if sample_rate == 16000 else '8k'
tag = model_type + '-' + lang + '-' + sample_rate_str
res_path = self._get_pretrained_path(tag) # wenetspeech_zh
self.res_path = res_path
self.cfg_path = os.path.join(res_path,
pretrained_models[tag]['cfg_path'])
self.am_model = os.path.join(res_path,
pretrained_models[tag]['model'])
self.am_params = os.path.join(res_path,
pretrained_models[tag]['params'])
logger.info(res_path)
logger.info(self.cfg_path)
logger.info(self.am_model)
logger.info(self.am_params)
else:
self.cfg_path = os.path.abspath(cfg_path)
self.am_model = os.path.abspath(am_model)
self.am_params = os.path.abspath(am_params)
self.res_path = os.path.dirname(
os.path.dirname(os.path.abspath(self.cfg_path)))
#Init body.
self.config = CfgNode(new_allowed=True)
self.config.merge_from_file(self.cfg_path)
with UpdateConfig(self.config):
if "deepspeech2online" in model_type or "deepspeech2offline" in model_type:
from paddlespeech.s2t.io.collator import SpeechCollator
self.vocab = self.config.vocab_filepath
self.config.decode.lang_model_path = os.path.join(
MODEL_HOME, 'language_model',
self.config.decode.lang_model_path)
self.collate_fn_test = SpeechCollator.from_config(self.config)
self.text_feature = TextFeaturizer(
unit_type=self.config.unit_type, vocab=self.vocab)
lm_url = pretrained_models[tag]['lm_url']
lm_md5 = pretrained_models[tag]['lm_md5']
self.download_lm(
lm_url,
os.path.dirname(self.config.decode.lang_model_path), lm_md5)
elif "conformer" in model_type or "transformer" in model_type or "wenetspeech" in model_type:
raise Exception("wrong type")
else:
raise Exception("wrong type")
# AM predictor
self.am_predictor_conf = am_predictor_conf
self.am_predictor = init_predictor(
model_file=self.am_model,
params_file=self.am_params,
predictor_conf=self.am_predictor_conf)
# decoder
self.decoder = CTCDecoder(
odim=self.config.output_dim, # <blank> is in vocab
enc_n_units=self.config.rnn_layer_size * 2,
blank_id=self.config.blank_id,
dropout_rate=0.0,
reduction=True, # sum
batch_average=True, # sum / batch_size
grad_norm_type=self.config.get('ctc_grad_norm_type', None))
@paddle.no_grad()
def infer(self, model_type: str):
"""
Model inference and result stored in self.output.
"""
cfg = self.config.decode
audio = self._inputs["audio"]
audio_len = self._inputs["audio_len"]
if "deepspeech2online" in model_type or "deepspeech2offline" in model_type:
decode_batch_size = audio.shape[0]
# init once
self.decoder.init_decoder(
decode_batch_size, self.text_feature.vocab_list,
cfg.decoding_method, cfg.lang_model_path, cfg.alpha, cfg.beta,
cfg.beam_size, cfg.cutoff_prob, cfg.cutoff_top_n,
cfg.num_proc_bsearch)
output_data = run_model(self.am_predictor,
[audio.numpy(), audio_len.numpy()])
probs = output_data[0]
eouts_len = output_data[1]
batch_size = probs.shape[0]
self.decoder.reset_decoder(batch_size=batch_size)
self.decoder.next(probs, eouts_len)
trans_best, trans_beam = self.decoder.decode()
# self.model.decoder.del_decoder()
self._outputs["result"] = trans_best[0]
elif "conformer" in model_type or "transformer" in model_type:
raise Exception("invalid model name")
else:
raise Exception("invalid model name")
class ASREngine(BaseEngine):
"""ASR server engine
Args:
metaclass: Defaults to Singleton.
"""
def __init__(self):
super(ASREngine, self).__init__()
def init(self, config_file: str) -> bool:
"""init engine resource
Args:
config_file (str): config file
Returns:
bool: init failed or success
"""
self.input = None
self.output = None
self.executor = ASRServerExecutor()
self.config = get_config(config_file)
paddle.set_device(paddle.get_device())
self.executor._init_from_path(
model_type=self.config.model_type,
am_model=self.config.am_model,
am_params=self.config.am_params,
lang=self.config.lang,
sample_rate=self.config.sample_rate,
cfg_path=self.config.cfg_path,
decode_method=self.config.decode_method,
am_predictor_conf=self.config.am_predictor_conf)
logger.info("Initialize ASR server engine successfully.")
return True
def run(self, audio_data):
"""engine run
Args:
audio_data (bytes): base64.b64decode
"""
if self.executor._check(
io.BytesIO(audio_data), self.config.sample_rate,
self.config.force_yes):
logger.info("start running asr engine")
self.executor.preprocess(self.config.model_type,
io.BytesIO(audio_data))
self.executor.infer(self.config.model_type)
self.output = self.executor.postprocess() # Retrieve result of asr.
logger.info("end inferring asr engine")
else:
logger.info("file check failed!")
self.output = None
def postprocess(self):
"""postprocess
"""
return self.output