#!/usr/bin/env python

# Copyright 2012  Brno University of Technology (author: Karel Vesely)

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#  http://www.apache.org/licenses/LICENSE-2.0
#
# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
# MERCHANTABLITY OR NON-INFRINGEMENT.
# See the Apache 2 License for the specific language governing permissions and
# limitations under the License.

# ./gen_hamm_mat.py
# script generates diagonal matrix with hamming window values
from __future__ import print_function

from math import *
import sys


from optparse import OptionParser

parser = OptionParser()
parser.add_option("--fea-dim", dest="dim", help="feature dimension")
parser.add_option("--splice", dest="splice", help="applied splice value")
(options, args) = parser.parse_args()

if options.dim == None:
    parser.print_help()
    sys.exit(1)

dim = int(options.dim)
splice = int(options.splice)


# generate the diagonal matrix with hammings
M_2PI = 6.283185307179586476925286766559005

dim_mat = (2 * splice + 1) * dim
timeContext = 2 * splice + 1
print("[")
for row in range(dim_mat):
    for col in range(dim_mat):
        if col != row:
            print("0", end=" ")
        else:
            i = int(row / dim)
            print(str(0.54 - 0.46 * cos((M_2PI * i) / (timeContext - 1))), end=" ")
    print()

print("]")
