htk_io.py 文件源码

def readheader(self):
        self.fh.seek(0,0)
        spam = self.fh.read(12)
        self.nSamples, self.sampPeriod, self.sampSize, self.parmKind = \
                       unpack(">IIHH", spam)
        # Get coefficients for compressed data
        if self.parmKind & _C:
            self.dtype = 'h'
            self.veclen = self.sampSize / 2
            if self.parmKind & 0x3f == IREFC:
                self.A = 32767
                self.B = 0
            else:
                self.A = numpy.fromfile(self.fh, 'f', self.veclen)
                self.B = numpy.fromfile(self.fh, 'f', self.veclen)
                if self.swap:
                    self.A = self.A.byteswap()
                    self.B = self.B.byteswap()
        else:
            self.dtype = 'f'    
            self.veclen = self.sampSize / 4
        self.hdrlen = self.fh.tell()