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/**
bespoke synth, a software modular synthesizer
Copyright (C) 2021 Ryan Challinor (contact: awwbees@gmail.com)
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 3 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, see <http://www.gnu.org/licenses/>.
**/
//
// ModulationChain.cpp
// Bespoke
//
// Created by Ryan Challinor on 12/26/15.
//
//
#include "ModulationChain.h"
ModulationChain::ModulationChain(float initialValue)
{
mRamp.SetValue(initialValue);
mLFO.SetMode(kLFOMode_Oscillator);
}
float ModulationChain::GetValue(int samplesIn) const
{
float value = GetIndividualValue(samplesIn);
if (mMultiplyIn)
value *= mMultiplyIn->GetIndividualValue(samplesIn);
if (mSidechain)
value += mSidechain->GetIndividualValue(samplesIn);
if (mPrev)
value += mPrev->GetValue(samplesIn);
if (std::isnan(value))
return 0;
return value;
}
float ModulationChain::GetIndividualValue(int samplesIn) const
{
double time = gTime + gInvSampleRateMs * samplesIn;
float value;
if (mRamp.HasValue(time))
value = mRamp.Value(time);
else
value = 0;
if (mLFOAmount != 0)
value += mLFO.Value(samplesIn) * mLFOAmount;
if (mBuffer != nullptr && samplesIn >= 0 && samplesIn < gBufferSize)
value += mBuffer[samplesIn];
return value;
}
void ModulationChain::SetValue(float value)
{
mRamp.Start(gTime, value, gTime + gInvSampleRateMs * gBufferSize);
}
void ModulationChain::RampValue(double time, float from, float to, double length)
{
mRamp.Start(time, from, to, time + length);
}
void ModulationChain::SetLFO(NoteInterval interval, float amount)
{
mLFO.SetPeriod(interval);
mLFOAmount = amount;
}
void ModulationChain::AppendTo(ModulationChain* chain)
{
mPrev = chain;
}
void ModulationChain::SetSidechain(ModulationChain* chain)
{
mSidechain = chain;
}
void ModulationChain::MultiplyIn(ModulationChain* chain)
{
mMultiplyIn = chain;
}
void ModulationChain::CreateBuffer()
{
if (mBuffer == nullptr)
mBuffer = new float[gBufferSize];
Clear(mBuffer, gBufferSize);
}
void ModulationChain::FillBuffer(float* buffer)
{
if (mBuffer != nullptr)
BufferCopy(mBuffer, buffer, gBufferSize);
}
float ModulationChain::GetBufferValue(int sampleIdx)
{
if (mBuffer != nullptr && sampleIdx >= 0 && sampleIdx < gBufferSize)
return mBuffer[sampleIdx];
return 0;
}
Modulations::Modulations(bool isGlobalEffect)
{
mVoiceModulations.resize(kNumVoices);
if (isGlobalEffect)
{
for (int i = 0; i < kNumVoices; ++i)
{
mVoiceModulations[i].mPitchBend.SetSidechain(&mGlobalModulation.mPitchBend);
mVoiceModulations[i].mModWheel.SetSidechain(&mGlobalModulation.mModWheel);
mVoiceModulations[i].mPressure.SetSidechain(&mGlobalModulation.mPressure);
}
}
}
ModulationChain* Modulations::GetPitchBend(int voiceIdx)
{
if (voiceIdx == -1)
return &mGlobalModulation.mPitchBend;
else
return &mVoiceModulations[voiceIdx].mPitchBend;
}
ModulationChain* Modulations::GetModWheel(int voiceIdx)
{
if (voiceIdx == -1)
return &mGlobalModulation.mModWheel;
else
return &mVoiceModulations[voiceIdx].mModWheel;
}
ModulationChain* Modulations::GetPressure(int voiceIdx)
{
if (voiceIdx == -1)
return &mGlobalModulation.mPressure;
else
return &mVoiceModulations[voiceIdx].mPressure;
}
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