184 lines
4.0 KiB
C++
184 lines
4.0 KiB
C++
#ifndef HORUS_CBPSOLVER_H
|
|
#define HORUS_CBPSOLVER_H
|
|
|
|
#include <unordered_map>
|
|
|
|
#include "Solver.h"
|
|
#include "FactorGraph.h"
|
|
#include "Util.h"
|
|
#include "Horus.h"
|
|
|
|
class VarCluster;
|
|
class FacCluster;
|
|
class VarSignHash;
|
|
class FacSignHash;
|
|
class WeightedBpSolver;
|
|
|
|
typedef long Color;
|
|
typedef vector<Color> Colors;
|
|
typedef vector<std::pair<Color,unsigned>> VarSignature;
|
|
typedef vector<Color> FacSignature;
|
|
|
|
typedef unordered_map<unsigned, Color> DistColorMap;
|
|
typedef unordered_map<unsigned, Colors> VarColorMap;
|
|
|
|
typedef unordered_map<VarSignature, VarNodes, VarSignHash> VarSignMap;
|
|
typedef unordered_map<FacSignature, FacNodes, FacSignHash> FacSignMap;
|
|
|
|
typedef vector<VarCluster*> VarClusters;
|
|
typedef vector<FacCluster*> FacClusters;
|
|
|
|
typedef unordered_map<VarId, VarCluster*> VarId2VarCluster;
|
|
|
|
|
|
struct VarSignHash
|
|
{
|
|
size_t operator() (const VarSignature &sig) const
|
|
{
|
|
size_t val = hash<size_t>()(sig.size());
|
|
for (size_t i = 0; i < sig.size(); i++) {
|
|
val ^= hash<size_t>()(sig[i].first);
|
|
val ^= hash<size_t>()(sig[i].second);
|
|
}
|
|
return val;
|
|
}
|
|
};
|
|
|
|
|
|
struct FacSignHash
|
|
{
|
|
size_t operator() (const FacSignature &sig) const
|
|
{
|
|
size_t val = hash<size_t>()(sig.size());
|
|
for (size_t i = 0; i < sig.size(); i++) {
|
|
val ^= hash<size_t>()(sig[i]);
|
|
}
|
|
return val;
|
|
}
|
|
};
|
|
|
|
|
|
class VarCluster
|
|
{
|
|
public:
|
|
VarCluster (const VarNodes& vs) : members_(vs) { }
|
|
|
|
const VarNode* first (void) const { return members_.front(); }
|
|
|
|
const VarNodes& members (void) const { return members_; }
|
|
|
|
VarNode* representative (void) const { return repr_; }
|
|
|
|
void setRepresentative (VarNode* vn) { repr_ = vn; }
|
|
|
|
private:
|
|
VarNodes members_;
|
|
VarNode* repr_;
|
|
};
|
|
|
|
|
|
class FacCluster
|
|
{
|
|
public:
|
|
FacCluster (const FacNodes& fcs, const VarClusters& vcs)
|
|
: members_(fcs), varClusters_(vcs) { }
|
|
|
|
const FacNode* first (void) const { return members_.front(); }
|
|
|
|
const FacNodes& members (void) const { return members_; }
|
|
|
|
VarClusters& varClusters (void) { return varClusters_; }
|
|
|
|
FacNode* representative (void) const { return repr_; }
|
|
|
|
void setRepresentative (FacNode* fn) { repr_ = fn; }
|
|
|
|
private:
|
|
FacNodes members_;
|
|
VarClusters varClusters_;
|
|
FacNode* repr_;
|
|
};
|
|
|
|
|
|
class CbpSolver : public Solver
|
|
{
|
|
public:
|
|
CbpSolver (const FactorGraph& fg);
|
|
|
|
~CbpSolver (void);
|
|
|
|
void printSolverFlags (void) const;
|
|
|
|
Params solveQuery (VarIds);
|
|
|
|
static bool checkForIdenticalFactors;
|
|
|
|
private:
|
|
Color getNewColor (void)
|
|
{
|
|
++ freeColor_;
|
|
return freeColor_ - 1;
|
|
}
|
|
|
|
Color getColor (const VarNode* vn) const
|
|
{
|
|
return varColors_[vn->getIndex()];
|
|
}
|
|
|
|
Color getColor (const FacNode* fn) const
|
|
{
|
|
return facColors_[fn->getIndex()];
|
|
}
|
|
|
|
void setColor (const VarNode* vn, Color c)
|
|
{
|
|
varColors_[vn->getIndex()] = c;
|
|
}
|
|
|
|
void setColor (const FacNode* fn, Color c)
|
|
{
|
|
facColors_[fn->getIndex()] = c;
|
|
}
|
|
|
|
void findIdenticalFactors (void);
|
|
|
|
void setInitialColors (void);
|
|
|
|
void createGroups (void);
|
|
|
|
void createClusters (const VarSignMap&, const FacSignMap&);
|
|
|
|
VarSignature getSignature (const VarNode*);
|
|
|
|
FacSignature getSignature (const FacNode*);
|
|
|
|
void printGroups (const VarSignMap&, const FacSignMap&) const;
|
|
|
|
VarId getRepresentative (VarId vid)
|
|
{
|
|
assert (Util::contains (vid2VarCluster_, vid));
|
|
VarCluster* vc = vid2VarCluster_.find (vid)->second;
|
|
return vc->representative()->varId();
|
|
}
|
|
|
|
FactorGraph* getCompressedFactorGraph (void);
|
|
|
|
vector<vector<unsigned>> getWeights (void) const;
|
|
|
|
unsigned getWeight (const FacCluster*,
|
|
const VarCluster*, size_t index) const;
|
|
|
|
|
|
Color freeColor_;
|
|
Colors varColors_;
|
|
Colors facColors_;
|
|
VarClusters varClusters_;
|
|
FacClusters facClusters_;
|
|
VarId2VarCluster vid2VarCluster_;
|
|
const FactorGraph* compressedFg_;
|
|
WeightedBpSolver* solver_;
|
|
};
|
|
|
|
#endif // HORUS_CBPSOLVER_H
|
|
|