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/*
* DISTRHO PingPongPan Plugin, based on PingPongPan by Michael Gruhn
* Copyright (C) 2007 Michael Gruhn <michael-gruhn@web.de>
* Copyright (C) 2012-2015 Filipe Coelho <falktx@falktx.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation.
*
* 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 Lesser General Public License for more details.
*
* For a full copy of the license see the LICENSE file.
*/
#include "DistrhoPluginPingPongPan.hpp"
#include <cmath>
static const float k2PI = 6.283185307f;
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
DistrhoPluginPingPongPan::DistrhoPluginPingPongPan()
: Plugin(paramCount, 1, 0) // 1 program, 0 states
{
// set default values
loadProgram(0);
// reset
deactivate();
}
// -----------------------------------------------------------------------
// Init
void DistrhoPluginPingPongPan::initAudioPort(bool input, uint32_t index, AudioPort& port)
{
port.groupId = kPortGroupStereo;
Plugin::initAudioPort(input, index, port);
}
void DistrhoPluginPingPongPan::initParameter(uint32_t index, Parameter& parameter)
{
switch (index)
{
case paramFreq:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Frequency";
parameter.symbol = "freq";
parameter.ranges.def = 50.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 100.0f;
break;
case paramWidth:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Width";
parameter.symbol = "width";
parameter.unit = "%";
parameter.ranges.def = 75.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 100.0f;
break;
}
}
void DistrhoPluginPingPongPan::initProgramName(uint32_t index, String& programName)
{
if (index != 0)
return;
programName = "Default";
}
// -----------------------------------------------------------------------
// Internal data
float DistrhoPluginPingPongPan::getParameterValue(uint32_t index) const
{
switch (index)
{
case paramFreq:
return fFreq;
case paramWidth:
return fWidth;
default:
return 0.0f;
}
}
void DistrhoPluginPingPongPan::setParameterValue(uint32_t index, float value)
{
if (getSampleRate() <= 0.0)
return;
switch (index)
{
case paramFreq:
fFreq = value;
waveSpeed = (k2PI * fFreq / 100.0f)/(float)getSampleRate();
break;
case paramWidth:
fWidth = value;
break;
}
}
void DistrhoPluginPingPongPan::loadProgram(uint32_t index)
{
if (index != 0)
return;
// Default values
fFreq = 50.0f;
fWidth = 75.0f;
// reset filter values
activate();
}
// -----------------------------------------------------------------------
// Process
void DistrhoPluginPingPongPan::activate()
{
waveSpeed = (k2PI * fFreq / 100.0f)/(float)getSampleRate();
}
void DistrhoPluginPingPongPan::deactivate()
{
wavePos = 0.0f;
}
void DistrhoPluginPingPongPan::run(const float** inputs, float** outputs, uint32_t frames)
{
const float* in1 = inputs[0];
const float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
for (uint32_t i=0; i < frames; ++i)
{
pan = std::fmin(std::fmax(std::sin(wavePos) * (fWidth/100.0f), -1.0f), 1.0f);
if ((wavePos += waveSpeed) >= k2PI)
wavePos -= k2PI;
out1[i] = in1[i] * (pan > 0.0f ? 1.0f-pan : 1.0f);
out2[i] = in2[i] * (pan < 0.0f ? 1.0f+pan : 1.0f);
}
}
// -----------------------------------------------------------------------
Plugin* createPlugin()
{
return new DistrhoPluginPingPongPan();
}
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO
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