#include <common/StringBuffer.hpp>
#include <vst/Gain.hpp>

Gain::Gain(AudioMasterCallback audioMaster)
: AudioEffectX(audioMaster,NumPrograms,NumParams)
{
  mNameValuePairs[GainControl].setNameValue("Gain","db",1);
	setNumInputs(2);
	setNumOutputs(2);
	setUniqueID('Gain');
	canMono();
	canProcessReplacing();
	::strcpy(mProgramName,"Default");
}

Gain::~Gain()
{
}

void Gain::setProgramName(char *name)
{
  ::strcpy(mProgramName,name);
}

void Gain::getProgramName(char *name)
{
  ::strcpy(name,mProgramName);
}

void Gain::setParameter(long index,float value)
{
  mNameValuePairs[index].setValue(value);
}

float Gain::getParameter(long index)
{
  return mNameValuePairs[index].getValue();
}

void Gain::getParameterName(long index,char *label)
{
  ::strcpy(label,mNameValuePairs[index].getName().str());
}

void Gain::getParameterDisplay(long index,char *text)
{
  float2string(mNameValuePairs[index].getValue(),text);
}

void Gain::getParameterLabel(long index,char *label)
{
  ::strcpy(label,mNameValuePairs[index].getLabel());
}

void Gain::process(float **inputs,float **outputs,long sampleFrames)
{
  applyGain(inputs,outputs,sampleFrames);
}

void Gain::processReplacing(float **inputs,float **outputs,long sampleFrames)
{
  applyGain(inputs,outputs,sampleFrames);
}

void Gain::applyGain(float **inputs,float **outputs,long sampleFrames)
{
  float gain=mNameValuePairs[GainControl].getValue();
  float *in1 = inputs[0];
  float *in2 = inputs[1];
  float *out1 = outputs[0];
  float *out2 = outputs[1];

  while(--sampleFrames >= 0)
  {
    (*out1++) += (*in1++) * gain; // accumulating
    (*out2++) += (*in2++) * gain;
  }
}

void Gain::createDisplay(float value,char *text)
{
  StringBuffer stringBuffer;
	String strRep;
	if(value<0)value=0;
  int count=(int)(value*20.00);
	if(count<0)count=0;
  for(int index=0;index<count;index++)stringBuffer.append("|");
	strRep=stringBuffer.toString();
	if(strRep.isNull()||!strRep.length())strRep=" ";
	strcpy(text,stringBuffer.toString().str());
}