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31 lines
1018 B
31 lines
1018 B
# Copyright (c) 2022 PaddlePaddle Authors. 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 numpy as np
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def pcm16to32(audio: np.ndarray) -> np.ndarray:
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"""pcm int16 to float32
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Args:
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audio (np.ndarray): Waveform with dtype of int16.
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Returns:
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np.ndarray: Waveform with dtype of float32.
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"""
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if audio.dtype == np.int16:
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audio = audio.astype("float32")
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bits = np.iinfo(np.int16).bits
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audio = audio / (2**(bits - 1))
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return audio
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