/*
  Copyright (c) 2021 Alex Diener
  
  This software is provided 'as-is', without any express or implied
  warranty. In no event will the authors be held liable for any damages
  arising from the use of this software.
  
  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:
  
  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
  
  Alex Diener alex@ludobloom.com
*/

#include "audiosynth/SynthPropertyController_ramp.h"
#include "utilities/lookup3.h"
#include <math.h>

#define stemobject_implementation SynthPropertyController_ramp

stemobject_vtable_begin();
stemobject_vtable_entry(dispose);
stemobject_vtable_entry(copy);
stemobject_vtable_entry(isEqual);
stemobject_vtable_entry(hash);
stemobject_vtable_entry(setInitialValue);
stemobject_vtable_entry(remapRange);
stemobject_vtable_entry(sample);
stemobject_vtable_end();

SynthPropertyController_ramp * SynthPropertyController_ramp_create(SynthPropertyIdentifier propertyIdentifier, float startValue, float endValue, float curvePower, float onset, float endpoint, float resetPoint) {
	stemobject_create_implementation(init, propertyIdentifier, startValue, endValue, curvePower, onset, endpoint, resetPoint)
}

bool SynthPropertyController_ramp_init(SynthPropertyController_ramp * self, SynthPropertyIdentifier propertyIdentifier, float startValue, float endValue, float curvePower, float onset, float endpoint, float resetPoint) {
	call_super(init, self, propertyIdentifier);
	self->startValue = startValue;
	self->endValue = endValue;
	self->curvePower = curvePower;
	self->onset = onset;
	self->endpoint = endpoint;
	self->resetPoint = resetPoint;
	return true;
}

void SynthPropertyController_ramp_dispose(SynthPropertyController_ramp * self) {
	call_super_virtual(dispose, self);
}

SynthPropertyController_ramp * SynthPropertyController_ramp_copy(SynthPropertyController_ramp * self) {
	stemobject_copy_implementation(initCopy)
}

void SynthPropertyController_ramp_initCopy(SynthPropertyController_ramp * self, SynthPropertyController_ramp * original) {
	call_super(initCopy, self, (SynthPropertyController *) original);
	self->startValue = original->startValue;
	self->endValue = original->endValue;
	self->curvePower = original->curvePower;
	self->onset = original->onset;
	self->endpoint = original->endpoint;
	self->resetPoint = original->resetPoint;
}

bool SynthPropertyController_ramp_isEqual(SynthPropertyController_ramp * self, compat_type(SynthPropertyController_ramp *) compareUntyped) {
	SynthPropertyController_ramp * compare = compareUntyped;
	if (!call_super_virtual(isEqual, self, compare)) {
		return false;
	}
	return self->startValue == compare->startValue &&
	       self->endValue == compare->endValue &&
	       self->curvePower == compare->curvePower &&
	       self->onset == compare->onset &&
	       self->endpoint == compare->endpoint &&
	       self->resetPoint == compare->resetPoint;
}

uint32_t SynthPropertyController_ramp_hash(SynthPropertyController_ramp * self, uint32_t initval) {
	initval = hashlittle(&self->startValue, sizeof(self->startValue), initval);
	initval = hashlittle(&self->endValue, sizeof(self->endValue), initval);
	initval = hashlittle(&self->curvePower, sizeof(self->curvePower), initval);
	initval = hashlittle(&self->onset, sizeof(self->onset), initval);
	initval = hashlittle(&self->endpoint, sizeof(self->endpoint), initval);
	initval = hashlittle(&self->resetPoint, sizeof(self->resetPoint), initval);
	return initval;
}

void SynthPropertyController_ramp_setInitialValue(SynthPropertyController_ramp * self, float value) {
	self->startValue = self->endValue = value;
}

void SynthPropertyController_ramp_remapRange(SynthPropertyController_ramp * self, float fromMin, float fromMax, float toMin, float toMax) {
	self->startValue = (self->startValue - fromMin) / (fromMax - fromMin) * (toMax - toMin) + toMin;
	self->endValue = (self->endValue - fromMin) / (fromMax - fromMin) * (toMax - toMin) + toMin;
}

float SynthPropertyController_ramp_sample(SynthPropertyController_ramp * self, SamplerObject_state * state, float phase, float phaseDelta, float time, float timeDelta) {
	phase = fmodf(phase, self->resetPoint);
	float rampPhase = fmaxf(fminf((phase - self->onset) / fmaxf(self->endpoint - self->onset, 0.0f), 1.0f), 0.0f);
	rampPhase = powf(rampPhase, self->curvePower);
	return self->startValue + (self->endValue - self->startValue) * rampPhase;
}