void set_filter(int channel, filterType_t type, fixed param1,fixed param2,int mix,bool bassyMapping)
{
filter_t* flt=&filter[channel];
if(flt->type!=type) //reset only on filter type change (maybe no reset would make interresting bugs)
{
flt->height[0]=0; //idle state
flt->height[1]=0; //idle state
flt->speed[0]=0; //paused (to avoid having it goind crazy)
flt->speed[1]=0; //paused (to avoid having it goind crazy)
flt->hipdelay[0]=0 ;
flt->hipdelay[1]=0 ;
flt->type=type;
}
flt->dirt=fp_mul(i2fp(100),i2fp(1)-param1)+fp_mul(i2fp(5000),param1) ;
flt->mix =fp_mul(i2fp(mix),fp_inv_255) ;
if (param1 != flt->parm1)
{
flt->parm1=param1;
//adjust parm to get the most of the parameters, as the fx are more useful with near-limit parameters.
if (bassyMapping)
{
static const fixed fpFreqDivider = fl2fp(1/22050.0f);
static const fixed fpZeroSix = fl2fp(0.6f);
static const fixed fpThreeOne = fl2fp(3.1f);
fixed power = fp_add(fpZeroSix,fp_mul(param1,fpThreeOne));
fixed frequency = fl2fp(pow(10.0f,fp2fl(power))) ;
frequency=fp_mul(frequency,fpFreqDivider);
flt->freq=frequency;
}
else
{
flt->freq=fp_mul(param1,param1); //0 - .5 - 1 => 0 - .25 - 1
}
}
if (param2 != flt->parm2)
{
flt->parm2=param2;
flt->reso=i2fp(1)-param2 ;
flt->reso=fp_sub(fl2fp(1.f),fp_mul(flt->reso,fp_mul(flt->reso,flt->reso))); //0 - .5 - 1 => 0 - .93 - 1
}
}
void init_filters(void)
{
for(int i=0; i<8; i++)
{ //set sensible default values
//lowpass filter where everything passes with no resonance
set_filter(i,FLT_LOWPASS,i2fp(1),i2fp(0),i2fp(0),false);
}
fp_inv_255=fl2fp(1.0f/255) ;
filters_inited=true;
}
void SynthController::SetParameterValue(const SynthController::Parameter& parameter, const fixed& value)
{
bool envSetup = false;
switch(parameter)
{
case WAVE_SELECT:
oscillator_.SetShape(value);
break;
case WAVE_LOOP_START:
oscillator_.SetLoopStart(value);
break;
case WAVE_LOOP_END:
oscillator_.SetLoopWidth(value);
break;
case WAVE_OCTAVE:
{
int32_t octave = 0;
if (value < fl2fp(0.33f))
{
octave = -1;
}
if (value > fl2fp(0.66f))
{
octave = 1;
}
oscillator_.SetOctave(octave);
break;
}
case ANALOG_OSC_ON:
enableAnalog_ = value > fl2fp(0.5f);
break;
case ANALOG_PITCH_FINE_TUNE:
analogPitchFineTune_ = fp2fl(value)*256 - 128 ;
break;
case PITCH_GLIDE:
{
const fixed GLIDE_MULTIPLIER = fl2fp(0.4f);
fixed glideFactor = (value != 0 )
? fp_sub(GLIDE_MULTIPLIER, fp_mul(value, GLIDE_MULTIPLIER))
: SET_GLIDE_OFF;
anaPitchControl_.SetGlide(glideFactor);
digiPitchControl_.SetGlide(glideFactor);
break;
}
case NOISE_MIX:
noiseMix_ = value;
updateLevels();
break;
case KEYBOARD_MODE:
{
NoteControl::Mode mode = (NoteControl::Mode)int(fp2fl(value)*NoteControl::LAST*0.999f);
noteControl_.SetMode(mode);
break;
}
case ENV_ATTACK:
attack_ = MAX_ENVELOPE_TICK*fp2fl(value);
envSetup = true;
break;
case ENV_DECAY:
{
fixed scaledDecay = fp_add(value, ENVELOPE_SCALE);
decay_ = MAX_ENVELOPE_TICK*fp2fl(scaledDecay);
envSetup = true;
}
break;
case ENV_SUSTAIN:
{
fixed scaledSustain = fp_add(value, ENVELOPE_SCALE);
if (scaledSustain > FP_ONE)
{
scaledSustain = FP_ONE;
}
sustain_ = scaledSustain;
envSetup = true;
}
break;
case ENV_RELEASE:
release_ = MAX_ENVELOPE_TICK*fp2fl(value);
envSetup = true;
break;
case VCA_ENV_GATER:
envelope_.SetScaler(value);
break;
case VCF_ENV_MOD:
cutoffEnvMod_ = value;
break;
case AMP_GAIN:
gain_ = value;
updateLevels();
break;
}
if (envSetup)
{
envelope_.Setup(attack_, decay_, sustain_, release_);
}
}
updateTargetPitches();
if (noteControl_.ShouldKillEnvelope())
{
envelope_.Stop();
}
}
void SynthController::updateTargetPitches()
{
digiPitchControl_.SetTarget(noteControl_.GetDigitalTargetNote());
anaPitchControl_.SetTarget(noteControl_.GetAnalogTargetNote());
}
static const uint32_t MAX_ENVELOPE_TICK = 2000;
static const fixed ENVELOPE_SCALE = fl2fp(0.007874015748031f);
//-----------------------------------------------------------
void SynthController::SetParameterValue(const SynthController::Parameter& parameter, const fixed& value)
{
bool envSetup = false;
switch(parameter)
{
case WAVE_SELECT:
oscillator_.SetShape(value);
break;
case WAVE_LOOP_START:
oscillator_.SetLoopStart(value);