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/*
* DISTRHO CycleShifter, a DPF'ied CycleShifter.
* Copyright (C) 2004 Niall Moody
* Copyright (C) 2015-2022 Filipe Coelho <falktx@falktx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "DistrhoPluginCycleShifter.hpp"
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
DistrhoPluginCycleShifter::DistrhoPluginCycleShifter()
: Plugin(kParameterCount, 1, 0), // 1 program, 0 states
fNewCycleVolume(1.0f),
fInputVolume(1.0f),
OutIndex(0),
InCount(0),
ReadWrite(false),
EnvOld(0.0f)
{
std::memset(CycleBuffer, 0, sizeof(float)*BUFFER_SIZE);
}
// -----------------------------------------------------------------------
// Init
void DistrhoPluginCycleShifter::initAudioPort(bool input, uint32_t index, AudioPort& port)
{
port.groupId = kPortGroupMono;
Plugin::initAudioPort(input, index, port);
}
void DistrhoPluginCycleShifter::initParameter(uint32_t index, Parameter& parameter)
{
parameter.hints = kParameterIsAutomatable;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
switch (index)
{
case kParameterNewCycleVolume:
parameter.name = "New Cycle Vol";
parameter.symbol = "ncvolume";
parameter.ranges.def = 1.0f;
break;
case kParameterInputVolume:
parameter.name = "Input Vol";
parameter.symbol = "ipvolume";
parameter.ranges.def = 1.0f;
break;
}
}
void DistrhoPluginCycleShifter::initProgramName(uint32_t index, String& programName)
{
if (index != 0)
return;
programName = "Default";
}
// -----------------------------------------------------------------------
// Internal data
float DistrhoPluginCycleShifter::getParameterValue(uint32_t index) const
{
switch(index)
{
case kParameterNewCycleVolume:
return fNewCycleVolume;
case kParameterInputVolume:
return fInputVolume;
default:
return 0.0f;
}
}
void DistrhoPluginCycleShifter::setParameterValue(uint32_t index, float value)
{
switch(index)
{
case kParameterNewCycleVolume:
fNewCycleVolume = value;
break;
case kParameterInputVolume:
fInputVolume = value;
break;
}
}
void DistrhoPluginCycleShifter::loadProgram(uint32_t index)
{
if (index != 0)
return;
fNewCycleVolume = 1.0f;
fInputVolume = 1.0f;
}
// -----------------------------------------------------------------------
// Process
void DistrhoPluginCycleShifter::activate()
{
std::memset(CycleBuffer, 0, sizeof(float)*BUFFER_SIZE);
OutIndex = 0;
InCount = 0;
ReadWrite = false;
EnvOld = 0.0f;
}
void DistrhoPluginCycleShifter::run(const float** inputs, float** outputs, uint32_t frames)
{
const float* in = inputs[0];
/**/ float* out = outputs[0];
for (uint32_t i=0; i<frames; ++i)
*out++ = DoProcess(*in++);
}
// -----------------------------------------------------------------------
// Borrowed this from Toby Bear's Delphi template - it maybe adds a bit to cpu
// usage, but it makes things simpler...
// -----------------------------------------------------------------------
float DistrhoPluginCycleShifter::DoProcess(float a)
{
const float tempval = a;
if (! ReadWrite) // if we're in read mode
{
if (InCount == 0) // if we're waiting for the start of a new cycle to read
{
if (EnvOld < 0.0f && tempval >= 0.0f) // as soon as the input goes past 0 we start reading
{
CycleBuffer[InCount++] = tempval;
}
}
else if (! (EnvOld < 0.0f && tempval >= 0.0f)) // if we've not reached the end of the cycle yet
{
CycleBuffer[InCount] = tempval;
if (++InCount >= BUFFER_SIZE) // if we've reached the end of the buffer
{
InCount = BUFFER_SIZE;
ReadWrite = true; // we're in write mode now
}
}
else // we've reached the end of the cycle
{
CycleBuffer[InCount++] = 0.0f;
ReadWrite = true;
}
a *= fInputVolume;
}
else // we're in write mode
{
a = (a*fInputVolume) + (CycleBuffer[OutIndex]*fNewCycleVolume);
if (++OutIndex == InCount) // we've reached the end of our stored cycle
{
InCount = 0;
OutIndex = 0;
ReadWrite = false;
}
}
EnvOld = tempval;
return a;
}
// -----------------------------------------------------------------------
Plugin* createPlugin()
{
return new DistrhoPluginCycleShifter();
}
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO
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