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

//************************************************************//
//  IADSR.cpp: implementation of the IADSR class              //
//          ADSR with init and end values                     //
//                                                            //
//                                                            //
//************************************************************//

#include "IADSR.h"

//////////////// CONSTRUCTION / DESTRUCTION ////////////////////

IADSR::IADSR(){

  m_init = m_end = 0.f;
  AddMsg("init", 31);
  AddMsg("end", 32);

}

IADSR::IADSR(float init, float att, float maxamp, float dec, 
	     float sus, float rel, float end,
	     float dur, SndObj* InObj, int vecsize, float sr) : 
  ADSR(att, maxamp, dec, sus, rel,dur,InObj, vecsize, sr)
{
  m_init = init;
  m_end = end;
  AddMsg("init", 31);
  AddMsg("end", 32);
}

IADSR::~IADSR(){
     
}

////////////////// OPERATIONS ///////////////////////////////
int
IADSR::Set(char* mess, float value){

  switch (FindMsg(mess)){

  case 31:
    SetInit(value);
    return 1;

  case 32:
    SetEnd(value);
    return 1;

  default:
    return ADSR::Set(mess,value);
  }

}


short
IADSR::DoProcess()
{
  if(!m_error){  
    float a;
    for(m_vecpos=0; m_vecpos < m_vecsize; m_vecpos++){
      if(m_enable){   
	if(m_count == m_dur)m_count=0;
	if(m_count < m_att)
	  a = ((m_maxamp - m_init)/m_att)*m_count + m_init;	
	if(m_count >= m_att && m_count < (m_att+m_dec)) 
	  a = ((m_sus - m_maxamp)/m_dec)*(m_count - m_att) + m_maxamp;
	if(m_count >= (m_att+m_dec) && m_count <= (m_dur - m_rel))
	  a = m_sus;
	if (m_count > (m_dur - m_rel)) {
	  if( !m_sustain){
	    a = ((m_end - m_sus)/m_rel)*(m_count - (m_dur - m_rel)) + m_sus;
	    m_count++;
	  }
	  else a = m_sus;
	}
	else  m_count++;

	if(m_input) 
	  m_output[m_vecpos] = m_input->Output(m_vecpos)*a;
	else m_output[m_vecpos] = a;
      }	 
      else m_output[m_vecpos] = 0.f ;
 
    }
    return 1;
  } else return 0;
	
}
 

