commit
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# Copyright (c) 2021 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 wave
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import numpy as np
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def wav2pcm(wavfile, pcmfile, data_type=np.int16):
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f = open(wavfile, "rb")
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f.seek(0)
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f.read(44)
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data = np.fromfile(f, dtype=data_type)
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data.tofile(pcmfile)
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def pcm2wav(pcm_file, wav_file, channels=1, bits=16, sample_rate=16000):
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pcmf = open(pcm_file, 'rb')
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pcmdata = pcmf.read()
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pcmf.close()
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if bits % 8 != 0:
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raise ValueError("bits % 8 must == 0. now bits:" + str(bits))
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wavfile = wave.open(wav_file, 'wb')
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wavfile.setnchannels(channels)
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wavfile.setsampwidth(bits // 8)
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wavfile.setframerate(sample_rate)
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wavfile.writeframes(pcmdata)
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wavfile.close()
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