/*
    This file is part of EqualizerAPO, a system-wide equalizer.
    Copyright (C) 2015  Jonas Thedering

    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.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include <vector>

struct FilterNode
{
	double freq;
	double dbGain;

	FilterNode(double freq, double dbGain)
	{
		this->freq = freq;
		this->dbGain = dbGain;
	}

	bool operator<(FilterNode other)
	{
		return freq < other.freq;
	}
};

class GainIterator
{
public:
	GainIterator(const std::vector<FilterNode>& nodes);
	double gainAt(double freq);

private:
	std::vector<FilterNode> nodes;
	FilterNode* nodeLeft;
	FilterNode* nodeRight;
	double logLeft;
	double logRightMinusLeft;
};