/*
 * WaveShaperControls.cpp - controls for WaveShaper effect
 *
 * Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
 * Copyright (c) 2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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 (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */


#include <QDomElement>

#include "WaveShaperControls.h"
#include "WaveShaper.h"
#include "base64.h"
#include "Graph.h"
#include "Engine.h"
#include "Song.h"

namespace lmms
{


#define onedB 1.1220184543019633f

WaveShaperControls::WaveShaperControls( WaveShaperEffect * _eff ) :
	EffectControls( _eff ),
	m_effect( _eff ),
	m_inputModel( 1.0f, 0.0f, 5.0f, 0.01f, this, tr( "Input gain" ) ),
	m_outputModel( 1.0f, 0.0f, 5.0f, 0.01f, this, tr( "Output gain" ) ),
	m_wavegraphModel( 0.0f, 1.0f, 200, this ),
	m_clipModel( false, this )
{
	connect( &m_wavegraphModel, SIGNAL( samplesChanged( int, int ) ),
			this, SLOT( samplesChanged( int, int ) ) );

	setDefaultShape();
}




void WaveShaperControls::samplesChanged( int _begin, int _end)
{
	Engine::getSong()->setModified();
}




void WaveShaperControls::loadSettings( const QDomElement & _this )
{
//load input, output knobs
	m_inputModel.loadSettings( _this, "inputGain" );
	m_outputModel.loadSettings( _this, "outputGain" );

	m_clipModel.loadSettings( _this, "clipInput" );

//load waveshape
	int size = 0;
	char * dst = 0;
	base64::decode( _this.attribute( "waveShape"), &dst, &size );

	m_wavegraphModel.setSamples( (float*) dst );
	delete[] dst;

}




void WaveShaperControls::saveSettings( QDomDocument & _doc,
							QDomElement & _this )
{
//save input, output knobs
	m_inputModel.saveSettings( _doc, _this, "inputGain" );
	m_outputModel.saveSettings( _doc, _this, "outputGain" );

	m_clipModel.saveSettings( _doc, _this, "clipInput" );

//save waveshape
	QString sampleString;
	base64::encode( (const char *)m_wavegraphModel.samples(),
		m_wavegraphModel.length() * sizeof(float), sampleString );
	_this.setAttribute( "waveShape", sampleString );

}


void WaveShaperControls::setDefaultShape()
{
	auto shp = std::array<float, 200>{};
	for ( int i = 0; i<200; i++)
	{
		shp[i] = ((float)i + 1.0f) / 200.0f;
	}

	m_wavegraphModel.setLength( 200 );
	m_wavegraphModel.setSamples( (float*)&shp );
}

void WaveShaperControls::resetClicked()
{
	setDefaultShape();
	Engine::getSong()->setModified();
}

void WaveShaperControls::smoothClicked()
{
	m_wavegraphModel.smoothNonCyclic();
	Engine::getSong()->setModified();
}

void WaveShaperControls::addOneClicked()
{
	for( int i=0; i<200; i++ )
	{
		m_wavegraphModel.setSampleAt( i, qBound( 0.0f, m_wavegraphModel.samples()[i] * onedB, 1.0f ) );
	}
	Engine::getSong()->setModified();
}

void WaveShaperControls::subOneClicked()
{
	for( int i=0; i<200; i++ )
	{
		m_wavegraphModel.setSampleAt( i, qBound( 0.0f, m_wavegraphModel.samples()[i] / onedB, 1.0f ) );
	}
	Engine::getSong()->setModified();
}


} // namespace lmms