 
////////////////////////////////////////////////////////////////////////
// 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

//************************************************************//
//  SndTable.cpp:  implementation of the SndTable object      //
//               (soundfile function table)                   //
//                                                            //
//                                                            //
//************************************************************//
#include "SndTable.h"
//////////construction / destruction ///////////////////////
SndTable :: SndTable(){

  m_L = 1;
  m_channel = 0;
  m_input = 0;
  m_table = new float[m_L];
  MakeTable();

}

SndTable :: SndTable(long L, SndFIO* input, short channel){

  m_L = L;
  m_channel = channel;
  m_input = input;
  m_table = new float [m_L];
  MakeTable();

}


SndTable :: ~SndTable(){

  delete[] m_table;

}


///////////// OPERATIONS ////////////////////////////////////
void 
SndTable :: SetInput(long L, SndFIO* input, short channel){
  m_input = input;
  m_channel = channel;
  m_L = L;
  delete[] m_table;
  m_table = new float[m_L];
}

short
SndTable :: MakeTable(){
  if(!m_input){
    m_error = 1;
    return 0;
  }
  else {
    int n, i;
    float max = 0.f;
    short chan = m_input->GetChannels();
    long size = m_input->GetVectorSize();
    for(n = 0; n < m_L; n+=size){
      m_input->Read();
      for(i = 0; (i < size) && (n+i < m_L); i++){
	m_table[n+i] = m_input->Output(i, m_channel);
	max = (fabs((double)max) < fabs((double)m_table[n+i])) ? m_table[n+i] : max;
      }
    }
    m_input->SetPos(0.f);
    if(max) for (n = 0; n < m_L; n++) m_table[n] /= max;
    return 1;            
  }
}
///////////////// ERROR HANDLING ///////////////////////////////

char*
SndTable::ErrorMessage(){
  
  char* message;
   
  switch(m_error){

  case 0:
    message = "No error.";
    break; 

  case 1:
    message = "MakeTable() failed. No input obj..";
    break;

  default:
    message = "Undefined error";
    break;
  }

  return message;

}
