vggish
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101 lines
3.4 KiB
101 lines
3.4 KiB
# Copyright 2021 Zilliz. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import warnings
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import os
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import sys
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import numpy
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from pathlib import Path
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from typing import List
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import torch
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from towhee.operator.base import NNOperator
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from towhee.models.vggish.torch_vggish import VGG
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from towhee import register
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from towhee.types.audio_frame import AudioFrame
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sys.path.append(str(Path(__file__).parent))
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import vggish_input
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warnings.filterwarnings('ignore')
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log = logging.getLogger()
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@register(output_schema=['vec'])
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class Vggish(NNOperator):
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"""
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"""
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def __init__(self, weights_path: str = None, framework: str = 'pytorch') -> None:
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super().__init__(framework=framework)
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self.device = "cuda" if torch.cuda.is_available() else "cpu"
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self.model = VGG()
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if not weights_path:
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path = str(Path(__file__).parent)
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weights_path = os.path.join(path, 'vggish.pth')
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state_dict = torch.load(weights_path, map_location=torch.device('cpu'))
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self.model.load_state_dict(state_dict)
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self.model.eval()
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self.model.to(self.device)
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def __call__(self, data: List[AudioFrame]) -> numpy.ndarray:
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audio_tensors = self.preprocess(data).to(self.device)
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features = self.model(audio_tensors)
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outs = features.to("cpu")
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return outs.detach().numpy()
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def preprocess(self, frames: List[AudioFrame]):
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sr = frames[0].sample_rate
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layout = frames[0].layout
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if layout == 'stereo':
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frames = [frame.reshape(-1, 2) for frame in frames]
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audio = numpy.vstack(frames)
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else:
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audio = numpy.hstack(frames)
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audio = audio.transpose()
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audio = self.int2float(audio)
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try:
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audio_tensors = vggish_input.waveform_to_examples(audio, sr, return_tensor=True)
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return audio_tensors
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except Exception as e:
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log.error("Fail to load audio data.")
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raise e
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def int2float(self, wav: numpy.ndarray, dtype: str = 'float64'):
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"""
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Convert audio data from int to float.
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The input dtype must be integers.
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The output dtype is controlled by the parameter `dtype`, defaults to 'float64'.
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The code is inspired by https://github.com/mgeier/python-audio/blob/master/audio-files/utility.py
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"""
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dtype = numpy.dtype(dtype)
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assert dtype.kind == 'f'
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if wav.dtype.kind in 'iu':
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# ii = numpy.iinfo(wav.dtype)
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# abs_max = 2 ** (ii.bits - 1)
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# offset = ii.min + abs_max
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# return (wav.astype(dtype) - offset) / abs_max
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if wav.dtype != 'int16':
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wav = (wav >> 16).astype(numpy.int16)
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assert wav.dtype == 'int16'
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wav = (wav / 32768.0).astype(dtype)
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return wav
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else:
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log.warning('Converting float dtype from %s to %s.', wav.dtype, dtype)
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return wav.astype(dtype)
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