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#!/usr/bin/env python
from cmusphinx import s3mixw
import sys
import struct
import numpy
def usage():
print "Usage: %s IN_SENDUMP OUT_MIXW" % sys.argv[0]
def readstr(fh):
nbytes = struct.unpack('I', fh.read(4))[0]
if nbytes == 0:
return None
else:
return fh.read(nbytes)
if __name__ == '__main__':
if len(sys.argv) < 3:
usage()
sys.exit(2)
sendump = open(sys.argv[1])
title = readstr(sendump)
while True:
header = readstr(sendump)
if header == None:
break
# Number of codewords and pdfs
r, c = struct.unpack('II', sendump.read(8))
print "rows: %d, columns: %d" % (r,c)
# Now read the stuff
opdf_8b = numpy.empty((c,4,r))
for i in range(0,4):
for j in range(0,r):
# Read bytes, expand to ints, shift them up
mixw = numpy.fromfile(sendump, 'B', c).astype('i') << 10
# Negate, exponentiate, and untranspose
opdf_8b[:,i,j] = numpy.power(1.0001, -mixw)
s3mixw.open(sys.argv[2], 'wb').writeall(opdf_8b)
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