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/*
==============================================================================
This file is part of the IEM plug-in suite.
Author: Daniel Rudrich
Copyright (c) 2017 - Institute of Electronic Music and Acoustics (IEM)
https://iem.at
The IEM plug-in suite 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.
The IEM plug-in suite 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 software. If not, see <https://www.gnu.org/licenses/>.
==============================================================================
*/
#pragma once
#include "../JuceLibraryCode/JuceHeader.h"
#include "ReferenceCountedDecoder.h"
#include "ReferenceCountedMatrix.h"
class MatrixMultiplication
{
public:
MatrixMultiplication() {}
void prepare (const juce::dsp::ProcessSpec& newSpec, bool prepareInputBuffering = true)
{
spec = newSpec;
if (prepareInputBuffering)
{
buffer.setSize (buffer.getNumChannels(), spec.maximumBlockSize);
bufferPrepared = true;
}
else
{
buffer.setSize (0, 0);
bufferPrepared = false;
}
checkIfNewMatrixAvailable();
}
void processReplacing (juce::dsp::AudioBlock<float> data)
{
checkIfNewMatrixAvailable();
// you have to call the prepare method with prepareInputBuffering set to true in order tu use the processReplacing method
jassert (bufferPrepared);
ReferenceCountedMatrix::Ptr retainedCurrentMatrix (currentMatrix);
if (retainedCurrentMatrix == nullptr || ! bufferPrepared)
{
data.clear();
return;
}
auto& T = retainedCurrentMatrix->getMatrix();
const int nInputChannels = juce::jmin (static_cast<int> (data.getNumChannels()),
static_cast<int> (T.getNumColumns()));
const int nSamples = static_cast<int> (data.getNumSamples());
// copy input data to buffer
for (int ch = 0; ch < nInputChannels; ++ch)
buffer.copyFrom (ch, 0, data.getChannelPointer (ch), nSamples);
juce::dsp::AudioBlock<float> ab (buffer.getArrayOfWritePointers(),
nInputChannels,
0,
nSamples);
processNonReplacing (ab, data, false);
}
void processNonReplacing (const juce::dsp::AudioBlock<float> inputBlock,
juce::dsp::AudioBlock<float> outputBlock,
const bool checkNewMatrix = true)
{
// you should call the processReplacing instead, it will buffer the input data
// this is a weak check, as e.g. if number channels differ, it won't trigger
jassert (inputBlock != outputBlock);
juce::ScopedNoDenormals noDenormals;
if (checkNewMatrix)
checkIfNewMatrixAvailable();
ReferenceCountedMatrix::Ptr retainedCurrentMatrix (currentMatrix);
if (retainedCurrentMatrix == nullptr)
{
outputBlock.clear();
return;
}
auto& T = retainedCurrentMatrix->getMatrix();
const int nInputChannels = juce::jmin (static_cast<int> (inputBlock.getNumChannels()),
static_cast<int> (T.getNumColumns()));
const int nSamples = static_cast<int> (inputBlock.getNumSamples());
for (int row = 0; row < T.getNumRows(); ++row)
{
const int destCh = retainedCurrentMatrix->getRoutingArrayReference().getUnchecked (row);
if (destCh < outputBlock.getNumChannels())
{
float* dest = outputBlock.getChannelPointer (destCh);
juce::FloatVectorOperations::multiply (dest,
inputBlock.getChannelPointer (0),
T (row, 0),
nSamples); // first channel
for (int i = 1; i < nInputChannels; ++i) // remaining channels
juce::FloatVectorOperations::addWithMultiply (dest,
inputBlock.getChannelPointer (i),
T (row, i),
nSamples);
}
}
juce::Array<int> routingCopy (retainedCurrentMatrix->getRoutingArrayReference());
routingCopy.sort();
int lastDest = -1;
const int nElements = routingCopy.size();
for (int i = 0; i < nElements; ++i)
{
const int destCh = routingCopy[i];
for (; ++lastDest < destCh;)
if (lastDest < outputBlock.getNumChannels())
juce::FloatVectorOperations::clear (outputBlock.getChannelPointer (lastDest),
(int) outputBlock.getNumSamples());
lastDest = destCh;
}
for (int ch = routingCopy.getLast() + 1; ch < outputBlock.getNumChannels(); ++ch)
juce::FloatVectorOperations::clear (outputBlock.getChannelPointer (ch),
(int) outputBlock.getNumSamples());
}
const bool checkIfNewMatrixAvailable()
{
if (newMatrixAvailable)
{
newMatrixAvailable = false;
currentMatrix = newMatrix;
newMatrix = nullptr;
if (currentMatrix != nullptr)
{
DBG ("MatrixTransformer: New matrix with name '" << currentMatrix->getName()
<< "' set.");
const int cols = (int) currentMatrix->getMatrix().getNumColumns();
buffer.setSize (cols, buffer.getNumSamples());
DBG ("MatrixTransformer: buffer resized to " << buffer.getNumChannels() << "x"
<< buffer.getNumSamples());
}
return true;
}
return false;
};
void setMatrix (ReferenceCountedMatrix::Ptr newMatrixToUse, bool force = false)
{
newMatrix = newMatrixToUse;
newMatrixAvailable = true;
if (force)
checkIfNewMatrixAvailable();
}
ReferenceCountedMatrix::Ptr getMatrix() { return currentMatrix; }
private:
//==============================================================================
juce::dsp::ProcessSpec spec = { -1, 0, 0 };
ReferenceCountedMatrix::Ptr currentMatrix { nullptr };
ReferenceCountedMatrix::Ptr newMatrix { nullptr };
juce::AudioBuffer<float> buffer;
bool bufferPrepared { false };
bool newMatrixAvailable { false };
};
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