/*
	This file is part of EqualizerAPO, a system-wide equalizer.
	Copyright (C) 2014  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.
*/

#include "stdafx.h"
#define _USE_MATH_DEFINES
#include <cmath>

#include "PreampFilter.h"

using namespace std;

PreampFilter::PreampFilter(double dbGain)
	:dbGain(dbGain)
{
	gain = (float)pow(10.0, dbGain / 20.0);
}

vector<wstring> PreampFilter::initialize(float sampleRate, unsigned maxFrameCount, vector<wstring> channelNames)
{
	this->channelCount = channelNames.size();

	return channelNames;
}

#pragma AVRT_CODE_BEGIN
void PreampFilter::process(float** output, float** input, unsigned frameCount)
{
	for(size_t i=0; i<channelCount; i++)
	{
		float* sampleChannel = input[i];

		for(unsigned j=0; j<frameCount; j++)
			sampleChannel[j] *= gain;
	}
}
#pragma AVRT_CODE_END
