VABinauralCluster.cpp

#define NOMINMAX

#include <math.h>
#include "VABinauralCluster.h"

// ITA includes
#include <ITAConstants.h>

// Utils
#include "../RelationMetrics/VARelationMetrics.h"
#include "../BinauralTimeOfArrivalEstimator/VABinauralTOAEstimator.h"

VABinauralCluster::VABinauralCluster()
{
}

VABinauralCluster::VABinauralCluster(const VABinauralCluster& cluster) :
	maxError(cluster.maxError),
	numSources(cluster.numSources),
	_clusterSourcePos(cluster._clusterSourcePos)
{

}


VABinauralCluster::~VABinauralCluster()
{
	VABinauralSoundSource* source;
	std::map<int, VABinauralSoundSource*>::const_iterator it;

	// clear all references from this cluster
	for (it = _sources.begin(); it != _sources.end();)
	{
		source = it->second;
		it = _sources.erase(it);

		source->RemoveReference();
	}
}

void
VABinauralCluster::init(int sourceID, VABinauralSoundSource* source, VABinauralListener* listener)
{
	_listener = listener;
	_listenerPos = listener->predPos;
	_clusterSourcePos = _clusterSourcePos + source->predPos;
	_clusterSourceToListenerPos = _clusterSourcePos - _listenerPos;

	_output = new ITASampleFrame(2, listener->output->GetLength(), true);
	
	_tmpChL.Init(listener->output->GetLength(), true);
	_tmpChR.Init(listener->output->GetLength(), true);

	maxError = getDistError(source);

	_sources.insert(std::pair<int, VABinauralSoundSource*>(sourceID, source));

	// --
	source->AddReference();

	++numSources;
}

void
VABinauralCluster::init(VABinauralCluster* cluster)
{
	_listener = cluster->_listener;
	_listenerPos = _listener->predPos;
	_clusterSourcePos = cluster->_clusterSourcePos;
	_clusterSourceToListenerPos = _clusterSourcePos - _listenerPos;

	_output = new ITASampleFrame(2, _listener->output->GetLength(), true);

	_tmpChL.Init(_listener->output->GetLength(), true);
	_tmpChR.Init(_listener->output->GetLength(), true);

	maxError = cluster->maxError;

	std::map< int, VABinauralSoundSource*>::const_iterator it;
	for (it = cluster->_sources.begin(); it != cluster->_sources.end(); ++it)
	{
		_sources.insert(std::pair<int, VABinauralSoundSource*>(it->first, it->second));
		it->second->AddReference();
	}

	numSources = cluster->numSources;
}

ITASampleFrame*
VABinauralCluster::getOutput()
{
	// reset output Buffer
	_output->zero();

	// get cluster HRTF TOA
	VARelationMetrics clusterSourceMetrics;
	clusterSourceMetrics.calc(_listener->predPos, _listener->predView, _listener->predUp, _clusterSourcePos);

	double toaHRTFChL = _listener->toaEstimator->getTOALeft(clusterSourceMetrics.phi, clusterSourceMetrics.theta);
	double toaHRTFChR = _listener->toaEstimator->getTOARight(clusterSourceMetrics.phi, clusterSourceMetrics.theta);

	// set VDL Values
	std::map<int, VABinauralSoundSource*>::const_iterator it;
	for (it = _sources.begin(); it != _sources.end(); ++it)
	{
		VABinauralSoundSource* source = it->second;
		const ITASampleBuffer* input = source->data->pSignalSourceInputBuf;

		VARelationMetrics sourceMetrics;
		sourceMetrics.calc(_listener->predPos, _listener->predView, _listener->predUp, source->predPos);

		double toaDistance = sourceMetrics.dist / 343; // TODO: Medium Propagation....
	
		double toaSourceChL = _listener->toaEstimator->getTOALeft(sourceMetrics.phi, sourceMetrics.theta);
		double toSourceaChR = _listener->toaEstimator->getTOARight(sourceMetrics.phi, sourceMetrics.theta);

		source->vdlChL->SetDelayTime(toaDistance + toaSourceChL - toaHRTFChL);
		source->vdlChR->SetDelayTime(toaDistance + toSourceaChR - toaHRTFChR);

		source->vdlChL->Process(input, &(_tmpChL));
		source->vdlChR->Process(input, &(_tmpChR));

		(*_output)[0] += _tmpChL;
		(*_output)[1] += _tmpChR;
	}

	// convolve here!

	return _output;
}

double
VABinauralCluster::getDistError(VABinauralSoundSource* source)
{
	VAVec3 sourceToListenerPos = source->predPos - _listenerPos;
	double dotp = _clusterSourceToListenerPos.Dot(sourceToListenerPos);

	return (dotp * dotp) / (_clusterSourcePos.Dot(_clusterSourcePos) * sourceToListenerPos.Dot(sourceToListenerPos));
}

void 
VABinauralCluster::addSource(int sourceID, VABinauralSoundSource* source)
{
	double err = getDistError(source);

	_clusterSourcePos = (source->predPos + _clusterSourcePos * numSources) / (numSources + 1);
	_clusterSourceToListenerPos = _clusterSourcePos - _listenerPos;

	maxError = std::max(err, maxError);

	_sources.insert(std::pair<int, VABinauralSoundSource*>(sourceID, source));

	// --
	source->AddReference();

	++numSources;
}

void
VABinauralCluster::addSource(int sourceID, VABinauralSoundSource* source, double error)
{
	_clusterSourcePos = (source->predPos + _clusterSourcePos * numSources) / (numSources + 1);
	_clusterSourceToListenerPos = _clusterSourcePos - _listenerPos;

	maxError = std::max(error, maxError);

	_sources.insert(std::pair<int, VABinauralSoundSource*>(sourceID, source));
	// --
	source->AddReference();

	++numSources;
}

void
VABinauralCluster::removeSource(int sourceID)
{
	std::map<int, VABinauralSoundSource*>::const_iterator it = _sources.find(sourceID);
	VABinauralSoundSource* source = it->second;

	_sources.erase(it);

	source->RemoveReference();

	_clusterSourcePos = (_clusterSourcePos * numSources - source->predPos) / (numSources - 1);

	//TODO: MaxError
	--numSources;

}