public static SVMParameter Convert(IntPtr ptr)
{
if (ptr == IntPtr.Zero)
{
return(null);
}
svm_parameter x = (svm_parameter)Marshal.PtrToStructure(ptr, typeof(svm_parameter));
return(SVMParameter.Convert(x));
}
public static SVMModel Convert(svm_model x)
{
SVMModel y = new SVMModel();
y.Creation = (CreationType)x.free_sv;
y.ClassCount = x.nr_class;
y.TotalSVCount = x.l;
if (y.Creation == CreationType.LOAD_MODEL)
{
y.Parameter = new SVMParameter();
y.Parameter.Type = (SVMType)x.param.svm_type;
y.Parameter.Kernel = (SVMKernelType)x.param.kernel_type;
switch (y.Parameter.Kernel)
{
case SVMKernelType.LINEAR:
break;
case SVMKernelType.POLY:
y.Parameter.Gamma = x.param.gamma;
y.Parameter.Coef0 = x.param.coef0;
y.Parameter.Degree = x.param.degree;
break;
case SVMKernelType.RBF:
y.Parameter.Gamma = x.param.gamma;
break;
case SVMKernelType.SIGMOID:
y.Parameter.Gamma = x.param.gamma;
y.Parameter.Coef0 = x.param.coef0;
break;
}
}
else
{
y.Parameter = SVMParameter.Convert(x.param);
}
int problemCount = (int)(y.ClassCount * (y.ClassCount - 1) * 0.5);
y.Rho = new double[problemCount];
Marshal.Copy(x.rho, y.Rho, 0, y.Rho.Length);
y.ProbabilityA = null;
if (x.probA != IntPtr.Zero)
{
y.ProbabilityA = new double[problemCount];
Marshal.Copy(x.probA, y.ProbabilityA, 0, y.ProbabilityA.Length);
}
y.ProbabilityB = null;
if (x.probB != IntPtr.Zero)
{
y.ProbabilityB = new double[problemCount];
Marshal.Copy(x.probB, y.ProbabilityB, 0, y.ProbabilityB.Length);
}
y.SVCounts = new int[y.ClassCount];
Marshal.Copy(x.nSV, y.SVCounts, 0, y.SVCounts.Length);
y.Labels = new int[y.ClassCount];
Marshal.Copy(x.label, y.Labels, 0, y.Labels.Length);
y.SVCoefs = new List <double[]>(y.ClassCount - 1);
IntPtr i_ptr_svcoef = x.sv_coef;
for (int i = 0; i < y.ClassCount - 1; i++)
{
y.SVCoefs.Add(new double[y.TotalSVCount]);
IntPtr coef_ptr = (IntPtr)Marshal.PtrToStructure(i_ptr_svcoef, typeof(IntPtr));
Marshal.Copy(coef_ptr, y.SVCoefs[i], 0, y.SVCoefs[i].Length);
i_ptr_svcoef = IntPtr.Add(i_ptr_svcoef, Marshal.SizeOf(typeof(IntPtr)));
}
y.SVIndices = null;
if (x.sv_indices != IntPtr.Zero)
{
y.SVIndices = new int[y.TotalSVCount];
Marshal.Copy(x.sv_indices, y.SVIndices, 0, y.SVIndices.Length);
}
y.SV = new List <SVMNode[]>();
IntPtr i_ptr_sv = x.SV;
for (int i = 0; i < x.l; i++)
{
IntPtr ptr_nodes = (IntPtr)Marshal.PtrToStructure(i_ptr_sv, typeof(IntPtr));
SVMNode[] nodes = SVMNode.Convert(ptr_nodes);
y.SV.Add(nodes);
i_ptr_sv = IntPtr.Add(i_ptr_sv, Marshal.SizeOf(typeof(IntPtr)));
}
return(y);
}