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//************************************************************//
// Oscil.cpp : implementation of the Oscil base class //
// //
// //
// //
//************************************************************//
#include "Oscil.h"
Oscil::Oscil(){
// initialise all values
m_ptable = 0;
m_fr = 440.f;
m_amp = 1.f;
m_inputamp = 0;
m_index = 0.f;
m_size = 0;
AddMsg("frequency", 21);
AddMsg("amplitude", 22);
AddMsg("phase", 23);
AddMsg("table", 24);
m_factor = m_size/m_sr;
}
Oscil::Oscil(Table* table, float fr, float amp,
SndObj* inputfreq, SndObj* inputamp,
int vecsize, float sr) :
SndObj(inputfreq, vecsize, sr) {
m_ptable = table;
m_size = m_ptable->GetLen();
m_fr = fr;
m_amp = amp;
m_index = 0.f;
m_inputamp = inputamp;
AddMsg("frequency", 21);
AddMsg("amplitude", 22);
AddMsg("phase", 23);
AddMsg("table", 24);
m_factor = m_size/m_sr;
}
Oscil::~Oscil(){}
int
Oscil::Connect(char* mess, void* input){
switch (FindMsg(mess)){
case 21:
m_input = (SndObj *) input;
return 1;
case 22:
m_inputamp = (SndObj *) input;
return 1;
case 23:
SetTable((Table *) input);
return 1;
default:
return SndObj::Connect(mess,input);
}
}
int
Oscil::Set(char* mess, float value){
switch (FindMsg(mess)){
case 1:
SetSr(value);
return 1;
case 21:
SetFreq(value);
return 1;
case 22:
SetAmp(value);
return 1;
case 23:
SetPhase(value);
return 1;
default:
return SndObj::Set(mess,value);
}
}
short
Oscil :: DoProcess(){
if(!m_error){
float fr;
float amp;
if(!m_ptable){
m_error = 1; // empty table object
return 0;
}
// control signal sampled at a lower rate
fr = m_fr + (m_input == 0 ? 0 : m_input->Output(0));
amp = m_amp + (m_inputamp == 0 ? 0 : m_inputamp->Output(0));
// wrapping loop
for(m_vecpos = 0; m_vecpos < m_vecsize; m_vecpos++){
if(m_enable){
// truncating lookup
m_output[m_vecpos] = amp*m_ptable->Lookup((int) m_index);
m_incr = (fr * m_factor);
m_index += m_incr;
} else { // if disabled
m_output[m_vecpos] = 0.f;
}
} // end wrapping loop
if(m_index > m_size) m_index -= m_size;
return 1;
}
else return 0;
}
void
Oscil::SetTable(Table* table){
m_ptable = table;
m_size = m_ptable->GetLen();
m_factor = m_size/m_sr;
}
short
Oscil::SetPhase(float phase){
if(m_ptable)
{
m_index = m_size*phase;
return 1;
}
else {
m_error = 2; // empty table
return 0;
}
}
void Oscil::SetSr(float sr)
{
SndObj::SetSr(sr);
m_factor = m_size/m_sr;
}
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