from typing import Union, Dict
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from pathlib import Path
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from typeguard import check_argument_types
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import os
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import logging
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import torch
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from funasr.bin.asr_inference_paraformer import Speech2Text
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from funasr.export.models import get_model
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class ASRModelExportParaformer:
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def __init__(self, cache_dir: Union[Path, str] = None, onnx: bool = True):
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assert check_argument_types()
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if cache_dir is None:
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cache_dir = Path.home() / "cache" / "export"
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self.cache_dir = Path(cache_dir)
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self.export_config = dict(
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feats_dim=560,
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onnx=onnx,
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)
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logging.info("output dir: {}".format(self.cache_dir))
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self.onnx = onnx
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def export(
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self,
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model: Speech2Text,
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tag_name: str = None,
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verbose: bool = False,
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):
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export_dir = self.cache_dir / tag_name.replace(' ', '-')
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os.makedirs(export_dir, exist_ok=True)
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# export encoder1
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self.export_config["model_name"] = "model"
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model = get_model(
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model,
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self.export_config,
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)
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if self.onnx:
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self._export_onnx(model, verbose, export_dir)
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logging.info("output dir: {}".format(export_dir))
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def export_from_modelscope(
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self,
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tag_name: str = 'damo/speech_paraformer-large_asr_nat-zh-cn-16k-common-vocab8404-pytorch',
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):
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from funasr.tasks.asr import ASRTaskParaformer as ASRTask
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from modelscope.hub.snapshot_download import snapshot_download
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model_dir = snapshot_download(tag_name, cache_dir=self.cache_dir)
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asr_train_config = os.path.join(model_dir, 'config.yaml')
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asr_model_file = os.path.join(model_dir, 'model.pb')
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cmvn_file = os.path.join(model_dir, 'am.mvn')
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model, asr_train_args = ASRTask.build_model_from_file(
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asr_train_config, asr_model_file, cmvn_file, 'cpu'
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)
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self.export(model, tag_name)
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def _export_onnx(self, model, verbose, path, enc_size=None):
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if enc_size:
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dummy_input = model.get_dummy_inputs(enc_size)
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else:
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dummy_input = model.get_dummy_inputs()
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# model_script = torch.jit.script(model)
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model_script = model #torch.jit.trace(model)
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torch.onnx.export(
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model_script,
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dummy_input,
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os.path.join(path, f'{model.model_name}.onnx'),
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verbose=verbose,
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opset_version=12,
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input_names=model.get_input_names(),
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output_names=model.get_output_names(),
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dynamic_axes=model.get_dynamic_axes()
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)
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if __name__ == '__main__':
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export_model = ASRModelExportParaformer()
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export_model.export_from_modelscope('damo/speech_paraformer-large_asr_nat-zh-cn-16k-common-vocab8404-pytorch')
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