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@@ -11,13 +11,18 @@ import numpy as np
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from .utils.utils import (ONNXRuntimeError,
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OrtInferSession, get_logger,
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read_yaml)
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-from .utils.frontend import WavFrontend
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+from .utils.frontend import WavFrontend, WavFrontendOnline
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from .utils.e2e_vad import E2EVadModel
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logging = get_logger()
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class Fsmn_vad():
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+ """
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+ Author: Speech Lab of DAMO Academy, Alibaba Group
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+ Deep-FSMN for Large Vocabulary Continuous Speech Recognition
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+ https://arxiv.org/abs/1803.05030
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+ """
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def __init__(self, model_dir: Union[str, Path] = None,
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batch_size: int = 1,
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device_id: Union[str, int] = "-1",
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@@ -151,4 +156,125 @@ class Fsmn_vad():
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outputs = self.ort_infer(feats)
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scores, out_caches = outputs[0], outputs[1:]
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return scores, out_caches
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+
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+
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+class Fsmn_vad_online():
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+ """
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+ Author: Speech Lab of DAMO Academy, Alibaba Group
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+ Deep-FSMN for Large Vocabulary Continuous Speech Recognition
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+ https://arxiv.org/abs/1803.05030
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+ """
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+ def __init__(self, model_dir: Union[str, Path] = None,
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+ batch_size: int = 1,
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+ device_id: Union[str, int] = "-1",
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+ quantize: bool = False,
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+ intra_op_num_threads: int = 4,
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+ max_end_sil: int = None,
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+ ):
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+
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+ if not Path(model_dir).exists():
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+ raise FileNotFoundError(f'{model_dir} does not exist.')
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+
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+ model_file = os.path.join(model_dir, 'model.onnx')
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+ if quantize:
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+ model_file = os.path.join(model_dir, 'model_quant.onnx')
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+ config_file = os.path.join(model_dir, 'vad.yaml')
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+ cmvn_file = os.path.join(model_dir, 'vad.mvn')
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+ config = read_yaml(config_file)
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+
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+ self.frontend = WavFrontendOnline(
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+ cmvn_file=cmvn_file,
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+ **config['frontend_conf']
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+ )
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+ self.ort_infer = OrtInferSession(model_file, device_id, intra_op_num_threads=intra_op_num_threads)
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+ self.batch_size = batch_size
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+ self.vad_scorer = E2EVadModel(config["vad_post_conf"])
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+ self.max_end_sil = max_end_sil if max_end_sil is not None else config["vad_post_conf"]["max_end_silence_time"]
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+ self.encoder_conf = config["encoder_conf"]
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+
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+ def prepare_cache(self, in_cache: list = []):
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+ if len(in_cache) > 0:
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+ return in_cache
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+ fsmn_layers = self.encoder_conf["fsmn_layers"]
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+ proj_dim = self.encoder_conf["proj_dim"]
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+ lorder = self.encoder_conf["lorder"]
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+ for i in range(fsmn_layers):
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+ cache = np.zeros((1, proj_dim, lorder - 1, 1)).astype(np.float32)
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+ in_cache.append(cache)
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+ return in_cache
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+
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+ def __call__(self, audio_in: np.ndarray, **kwargs) -> List:
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+ waveforms = np.expand_dims(audio_in, axis=0)
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+
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+ param_dict = kwargs.get('param_dict', dict())
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+ is_final = param_dict.get('is_final', False)
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+ feats, feats_len = self.extract_feat(waveforms, is_final)
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+ segments = []
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+ if feats.size != 0:
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+ in_cache = param_dict.get('in_cache', list())
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+ in_cache = self.prepare_cache(in_cache)
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+ try:
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+ inputs = [feats]
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+ inputs.extend(in_cache)
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+ scores, out_caches = self.infer(inputs)
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+ param_dict['in_cache'] = out_caches
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+ waveforms = self.frontend.get_waveforms()
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+ segments = self.vad_scorer(scores, waveforms, is_final=is_final, max_end_sil=self.max_end_sil,
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+ online=True)
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+
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+
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+ except ONNXRuntimeError:
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+ # logging.warning(traceback.format_exc())
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+ logging.warning("input wav is silence or noise")
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+ segments = []
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+ return segments
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+
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+ def load_data(self,
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+ wav_content: Union[str, np.ndarray, List[str]], fs: int = None) -> List:
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+ def load_wav(path: str) -> np.ndarray:
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+ waveform, _ = librosa.load(path, sr=fs)
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+ return waveform
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+
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+ if isinstance(wav_content, np.ndarray):
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+ return [wav_content]
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+
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+ if isinstance(wav_content, str):
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+ return [load_wav(wav_content)]
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+
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+ if isinstance(wav_content, list):
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+ return [load_wav(path) for path in wav_content]
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+
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+ raise TypeError(
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+ f'The type of {wav_content} is not in [str, np.ndarray, list]')
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+
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+ def extract_feat(self,
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+ waveforms: np.ndarray, is_final: bool = False
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+ ) -> Tuple[np.ndarray, np.ndarray]:
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+ waveforms_lens = np.zeros(waveforms.shape[0]).astype(np.int32)
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+ for idx, waveform in enumerate(waveforms):
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+ waveforms_lens[idx] = waveform.shape[-1]
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+
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+ feats, feats_len = self.frontend.extract_fbank(waveforms, waveforms_lens, is_final)
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+ # feats.append(feat)
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+ # feats_len.append(feat_len)
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+
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+ # feats = self.pad_feats(feats, np.max(feats_len))
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+ # feats_len = np.array(feats_len).astype(np.int32)
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+ return feats.astype(np.float32), feats_len.astype(np.int32)
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+
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+ @staticmethod
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+ def pad_feats(feats: List[np.ndarray], max_feat_len: int) -> np.ndarray:
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+ def pad_feat(feat: np.ndarray, cur_len: int) -> np.ndarray:
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+ pad_width = ((0, max_feat_len - cur_len), (0, 0))
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+ return np.pad(feat, pad_width, 'constant', constant_values=0)
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+
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+ feat_res = [pad_feat(feat, feat.shape[0]) for feat in feats]
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+ feats = np.array(feat_res).astype(np.float32)
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+ return feats
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+ def infer(self, feats: List) -> Tuple[np.ndarray, np.ndarray]:
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+
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+ outputs = self.ort_infer(feats)
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+ scores, out_caches = outputs[0], outputs[1:]
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+ return scores, out_caches
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+
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