wave.py

if __name__ == '__main__':
    import sys
    file = sys.argv[1]

    class Wave:
        def __init__(self, file):
            with open(file, 'rb') as fp:
                self.riff = fp.read(4).decode('ascii')
                self.size = int.from_bytes(fp.read(4), 'little')
                self.identity = fp.read(4).decode('ascii')

                self.fmt =  fp.read(4).decode('ascii')
                self.fmt_bytes = int.from_bytes(fp.read(4), 'little')
                self.format_id = int.from_bytes(fp.read(2), 'little')
                self.channel_num = int.from_bytes(fp.read(2), 'little')
                self.sampling_rate = int.from_bytes(fp.read(4), 'little')
                self.velocity = int.from_bytes(fp.read(4), 'little')
                self.block_size = int.from_bytes(fp.read(2), 'little')
                self.bitpersample = int.from_bytes(fp.read(2), 'little')

                if self.format_id == 1: # Linear PCM
                    self.extsize = 0
                    self.ext = b''
                else:
                    self.extsize = int.from_bytes(fp.read(2), 'little')
                    self.ext = fp.read(self.extsize)

                self.data =  fp.read(4).decode('ascii')
                self.wavesize = int.from_bytes(fp.read(4), 'little')

                self.wave = fp.read(self.wavesize)

        def meta(self):
            return {
                'RIFF': self.riff,
                'FileSize': self.size,
                'Identity': self.identity,
                'FMT': self.fmt,
                'FMTSize': self.fmt_bytes,
                'FormatID': self.format_id,
                'Channel': self.channel_num,
                'SamplingRate': self.sampling_rate,
                'DataVelocity': self.velocity,
                'BlockSize': self.block_size,
                'BitPerSample': self.bitpersample,
                'ExtensionSize': self.extsize,
                'Data': self.data,
                'WaveSize': self.wavesize
            }


    wave = Wave(file)

    import json
    js = json.dumps(wave.meta(), indent=True)
    print(js)