public static bool a_star_in_composition(Intarray inputs,
Intarray vertices1,
Intarray vertices2,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
OcroFST fst2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(fst1, fst2);
bool result;
try
{
//Floatarray g1 = new Floatarray();
//Floatarray g2 = new Floatarray();
fst1.CalculateHeuristics();
fst2.CalculateHeuristics();
result = a_star2_internal(inputs, vertices1, vertices2, outputs,
costs, fst1, fst2,
fst1.Heuristics(),
fst2.Heuristics(), composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
return result;
}
public static bool a_star_in_composition(Intarray inputs,
Intarray vertices1,
Intarray vertices2,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
Floatarray g1,
OcroFST fst2,
Floatarray g2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(fst1, fst2);
bool result;
try
{
result = a_star2_internal(inputs, vertices1, vertices2, outputs,
costs, fst1, fst2,
g1,
g2, composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
return(result);
}
public static bool a_star_in_composition(Intarray inputs,
Intarray vertices1,
Intarray vertices2,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
OcroFST fst2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(fst1, fst2);
bool result;
try
{
//Floatarray g1 = new Floatarray();
//Floatarray g2 = new Floatarray();
fst1.CalculateHeuristics();
fst2.CalculateHeuristics();
result = a_star2_internal(inputs, vertices1, vertices2, outputs,
costs, fst1, fst2,
fst1.Heuristics(),
fst2.Heuristics(), composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
return(result);
}
public static CompositionFst MakeCompositionFst(OcroFST l1,
OcroFST l2,
int override_start = -1,
int override_finish = -1)
{
return(new CompositionFstImpl(l1, l2,
override_start, override_finish));
}
public static CompositionFst MakeCompositionFst(OcroFST l1,
OcroFST l2,
int override_start = -1,
int override_finish = -1)
{
return new CompositionFstImpl(l1, l2,
override_start, override_finish);
}
public static double a_star(out string result, OcroFST fst)
{
result = "";
Intarray inputs = new Intarray();
Intarray vertices = new Intarray();
Intarray outputs = new Intarray();
Floatarray costs = new Floatarray();
if (!a_star(inputs, vertices, outputs, costs, fst))
return 1e38;
FstUtil.remove_epsilons(out result, outputs);
return NarrayUtil.Sum(costs);
}
public static double a_star(out string result, OcroFST fst1, OcroFST fst2)
{
result = "";
Intarray inputs = new Intarray();
Intarray v1 = new Intarray();
Intarray v2 = new Intarray();
Intarray outputs = new Intarray();
Floatarray costs = new Floatarray();
if (!a_star_in_composition(inputs, v1, v2, outputs, costs, fst1, fst2))
return 1e38;
FstUtil.remove_epsilons(out result, outputs);
return NarrayUtil.Sum(costs);
}
public static double beam_search(out string result, OcroFST fst1, OcroFST fst2,
int beam_width)
{
Intarray v1 = new Intarray();
Intarray v2 = new Intarray();
Intarray i = new Intarray();
Intarray o = new Intarray();
Floatarray c = new Floatarray();
//fprintf(stderr,"starting beam search\n");
beam_search(v1, v2, i, o, c, fst1, fst2, beam_width);
//fprintf(stderr,"finished beam search\n");
FstUtil.remove_epsilons(out result, o);
return NarrayUtil.Sum(c);
}
public static bool a_star(Intarray inputs,
Intarray vertices,
Intarray outputs,
Floatarray costs,
OcroFST fst)
{
AStarSearch a = new AStarSearch(fst);
if (!a.Loop())
return false;
if (!a.reconstruct_vertices(vertices))
return false;
a.reconstruct_edges(inputs, outputs, costs, vertices);
return true;
}
public static double a_star(out string result, OcroFST fst)
{
result = "";
Intarray inputs = new Intarray();
Intarray vertices = new Intarray();
Intarray outputs = new Intarray();
Floatarray costs = new Floatarray();
if (!a_star(inputs, vertices, outputs, costs, fst))
{
return(1e38);
}
FstUtil.remove_epsilons(out result, outputs);
return(NarrayUtil.Sum(costs));
}
public static double beam_search(out string result, OcroFST fst1, OcroFST fst2,
int beam_width)
{
Intarray v1 = new Intarray();
Intarray v2 = new Intarray();
Intarray i = new Intarray();
Intarray o = new Intarray();
Floatarray c = new Floatarray();
//fprintf(stderr,"starting beam search\n");
beam_search(v1, v2, i, o, c, fst1, fst2, beam_width);
//fprintf(stderr,"finished beam search\n");
FstUtil.remove_epsilons(out result, o);
return(NarrayUtil.Sum(c));
}
public static double a_star(out string result, OcroFST fst1, OcroFST fst2)
{
result = "";
Intarray inputs = new Intarray();
Intarray v1 = new Intarray();
Intarray v2 = new Intarray();
Intarray outputs = new Intarray();
Floatarray costs = new Floatarray();
if (!a_star_in_composition(inputs, v1, v2, outputs, costs, fst1, fst2))
{
return(1e38);
}
FstUtil.remove_epsilons(out result, outputs);
return(NarrayUtil.Sum(costs));
}
/// <summary>
/// Compose two FSTs.
/// This function copies the composition of two given FSTs.
/// That causes expansion (storing all arcs explicitly).
/// </summary>
public static void fst_expand_composition(IGenericFst outf, OcroFST f1, OcroFST f2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(f1, f2);
try
{
fst_copy(outf, composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
}
public static void scale_fst(OcroFST fst, float scale)
{
if (Math.Abs(scale - 1.0f) < 1e-6f)
{
return;
}
for (int i = 0; i < fst.nStates(); i++)
{
Floatarray cost = fst.Costs(i);
cost *= scale;
float accept = fst.AcceptCost(i);
if (accept >= 0.0f && accept < 1e37f)
{
fst.SetAcceptCost(i, accept * scale);
}
}
}
public BeamSearch(OcroFST fst1, OcroFST fst2, int beam_width)
{
stree = new SearchTree();
beam = new Intarray();
beamcost = new Floatarray();
all_inputs = new Intarray();
all_targets1 = new Intarray();
all_targets2 = new Intarray();
all_outputs = new Intarray();
all_costs = new Floatarray();
parent_trails = new Intarray();
this.fst1 = fst1;
this.fst2 = fst2;
this.nbest = new PriorityQueue(beam_width);
this.beam_width = beam_width;
accepted_from1 = -1;
accepted_from2 = -1;
}
public static bool a_star(Intarray inputs,
Intarray vertices,
Intarray outputs,
Floatarray costs,
OcroFST fst)
{
AStarSearch a = new AStarSearch(fst);
if (!a.Loop())
{
return(false);
}
if (!a.reconstruct_vertices(vertices))
{
return(false);
}
a.reconstruct_edges(inputs, outputs, costs, vertices);
return(true);
}
public static void beam_search(
Intarray vertices1,
Intarray vertices2,
Intarray inputs,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
OcroFST fst2,
int beam_width)
{
BeamSearch b = new BeamSearch(fst1, fst2, beam_width);
//CHECK(L_SIGMA < L_EPSILON);
//CHECK(L_RHO < L_PHI);
//CHECK(L_PHI < L_EPSILON);
//CHECK(L_EPSILON < 1);
fst1.SortByOutput();
fst2.SortByInput();
b.BestPath(vertices1, vertices2, inputs, outputs, costs);
}
public BeamSearch(OcroFST fst1, OcroFST fst2, int beam_width)
{
stree = new SearchTree();
beam = new Intarray();
beamcost = new Floatarray();
all_inputs = new Intarray();
all_targets1 = new Intarray();
all_targets2 = new Intarray();
all_outputs = new Intarray();
all_costs = new Floatarray();
parent_trails = new Intarray();
this.fst1 = fst1;
this.fst2 = fst2;
this.nbest = new PriorityQueue(beam_width);
this.beam_width = beam_width;
accepted_from1 = -1;
accepted_from2 = -1;
}
public static void beam_search(
Intarray vertices1,
Intarray vertices2,
Intarray inputs,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
OcroFST fst2,
int beam_width)
{
BeamSearch b = new BeamSearch(fst1, fst2, beam_width);
//CHECK(L_SIGMA < L_EPSILON);
//CHECK(L_RHO < L_PHI);
//CHECK(L_PHI < L_EPSILON);
//CHECK(L_EPSILON < 1);
fst1.SortByOutput();
fst2.SortByInput();
b.BestPath(vertices1, vertices2, inputs, outputs, costs);
}
public static bool a_star_in_composition(Intarray inputs,
Intarray vertices1,
Intarray vertices2,
Intarray outputs,
Floatarray costs,
OcroFST fst1,
Floatarray g1,
OcroFST fst2,
Floatarray g2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(fst1, fst2);
bool result;
try
{
result = a_star2_internal(inputs, vertices1, vertices2, outputs,
costs, fst1, fst2,
g1,
g2, composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
return result;
}
/// <summary>
/// Compose two FSTs.
/// This function copies the composition of two given FSTs.
/// That causes expansion (storing all arcs explicitly).
/// </summary>
public static void fst_expand_composition(IGenericFst outf, OcroFST f1, OcroFST f2)
{
CompositionFst composition = FstFactory.MakeCompositionFst(f1, f2);
try
{
fst_copy(outf, composition);
}
catch (Exception ex)
{
composition.Move1();
composition.Move2();
throw ex;
}
composition.Move1();
composition.Move2();
}
public static void scale_fst(OcroFST fst, float scale)
{
if(Math.Abs(scale-1.0f)<1e-6f)
return;
for (int i = 0; i < fst.nStates(); i++)
{
Floatarray cost = fst.Costs(i);
cost *= scale;
float accept = fst.AcceptCost(i);
if (accept >= 0.0f && accept < 1e37f)
fst.SetAcceptCost(i, accept * scale);
}
}