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////////////////////////////////////////////////////////////////////////
// This file is part of the SndObj library
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Copyright (c)Victor Lazzarini, 1997-2004
// See License.txt for a disclaimer of all warranties
// and licensing information
//************************************************************//
// HammingTable.cpp: implementation of the HammingTable //
// object (Generalized Hamming Window function table) //
// //
// //
//************************************************************//
#include "HammingTable.h"
//////////construction / destruction ///////////////////////
HammingTable :: HammingTable(){
m_L = 1024;
m_alpha = .54f;
m_table = new float[m_L+1];
MakeTable();
}
HammingTable :: HammingTable(long L, float alpha){
m_L = L;
m_alpha = alpha;
m_table = new float [m_L+1];
MakeTable();
}
HammingTable :: ~HammingTable(){
delete[] m_table;
}
///////////// OPERATIONS ////////////////////////////////////
void
HammingTable :: SetParam(long L, float alpha){
m_alpha = alpha;
m_L = L;
delete[] m_table;
m_table = new float[m_L+1];
}
short
HammingTable :: MakeTable(){
for(long n = 0; n < m_L; n++)
m_table[n]= (float)(m_alpha - (1-m_alpha)*
cos(n*TWOPI/(m_L-1.)));
m_table[m_L] = m_table[m_L-1];
return 1;
}
///////////////// ERROR HANDLING ///////////////////////////////
char*
HammingTable::ErrorMessage(){
char* message;
switch(m_error){
case 0:
message = "No error.";
break;
default:
message = "Undefined error";
break;
}
return message;
}
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