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| # Copyright (c) Alibaba, Inc. and its affiliates. | |
| from struct import * | |
| __all__=['wav2pcm', 'GetDefaultContext'] | |
| def GetDefaultContext(): | |
| """ | |
| Return Default Context Object | |
| """ | |
| return { | |
| 'sdk': { | |
| 'name': 'nls-python-sdk', | |
| 'version': '0.0.1', | |
| 'language': 'python' | |
| } | |
| } | |
| def wav2pcm(wavfile, pcmfile): | |
| """ | |
| Turn wav into pcm | |
| Parameters | |
| ---------- | |
| wavfile: str | |
| wav file path | |
| pcmfile: str | |
| output pcm file path | |
| """ | |
| with open(wavfile, 'rb') as i, open(pcmfile, 'wb') as o: | |
| i.seek(0) | |
| _id = i.read(4) | |
| _id = unpack('>I', _id) | |
| _size = i.read(4) | |
| _size = unpack('<I', _size) | |
| _type = i.read(4) | |
| _type = unpack('>I', _type) | |
| if _id[0] != 0x52494646 or _type[0] != 0x57415645: | |
| raise ValueError('not a wav!') | |
| i.read(32) | |
| result = i.read() | |
| o.write(result) | |