kopia lustrzana https://github.com/erdewit/HiFiScan
Simplify/optimize read_wav
rodzic
9f257e7872
commit
34050fe2a1
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@ -58,20 +58,22 @@ def read_wav(path: str) -> Sound:
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frames = wav.readframes(n)
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if width == 4:
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buff = np.frombuffer(frames, np.int32)
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data = buff.astype('f') / np.float32(2 ** 31 - 1)
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norm = 2 ** 31 - 1
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elif width == 3:
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buff = np.frombuffer(frames, np.uint8)
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uints = buff[0::3].astype(np.uint32) << 8 \
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| buff[1::3].astype(np.uint32) << 16 \
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| buff[2::3].astype(np.uint32) << 24
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data = uints.view(np.int32).astype('f') / np.float32(
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2 ** 31 - 2 ** 8)
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buff = uints.view(np.int32)
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norm = 2 ** 31 - 2 ** 8
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elif width == 2:
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buff = np.frombuffer(frames, np.int16)
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data = buff.astype('f') / np.float32(2 ** 15 - 1)
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norm = 2 ** 15 - 1
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else:
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buff = np.frombuffer(frames, np.int8)
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data = buff.astype('f') / np.float32(2 ** 7 - 1)
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norm = 2 ** 7 - 1
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data = buff.astype('f')
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data /= np.float32(norm)
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data = data.reshape((-1, ch)).T
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return Sound(data, rate, width)
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