#!/usr/bin/python -u
  
  # ./gen_splice.py
  # script generates splice nnet transfrom
  # 
  #     
  # author: Karel Vesely
  #
  
  from math import *
  import sys
  
  
  from optparse import OptionParser
  
  parser = OptionParser()
  parser.add_option('--fea-dim', dest='dim_in', help='feature dimension')
  parser.add_option('--splice', dest='splice', help='number of frames to concatenate with the central frame')
  parser.add_option('--splice-step', dest='splice_step', help='splicing step (frames dont need to be consecutive, --splice 3 --splice-step 2 will select offsets: -6 -4 -2 0 2 4 6)', default='1' )
  (options, args) = parser.parse_args()
  
  if(options.dim_in == None):
      parser.print_help()
      sys.exit(1)
  
  dim_in=int(options.dim_in)
  splice=int(options.splice)
  splice_step=int(options.splice_step)
  
  dim_out=(2*splice+1)*dim_in
  
  print '<splice>', dim_out, dim_in
  print '[',
  
  splice_vec = range(-splice*splice_step, splice*splice_step+1, splice_step)
  for idx in range(len(splice_vec)):
      print splice_vec[idx],
  
  print ']'