public static double[] GetCompensationWavForm(double[] x, double[] userMcep, double[] targetMcep)
{
IntPtr ptr_y = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(double)) * x.Length);
var y_length = DoubleDefinitions.GetCompensationWavForm(x, x.Length, userMcep, targetMcep, userMcep.Length, ptr_y);
var y = new double[y_length];
Marshal.Copy(ptr_y, y, 0, y.Length);
Marshal.FreeHGlobal(ptr_y);
return(y);
}
public static double[] GetUserMcep(double[] spectrum)
{
IntPtr ptr_mcep = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(double)) * spectrum.Length);
DoubleDefinitions.GetUserMcep(spectrum, spectrum.Length, ptr_mcep);
var mcep = new double[spectrum.Length];
Marshal.Copy(ptr_mcep, mcep, 0, mcep.Length);
Marshal.FreeHGlobal(ptr_mcep);
return(mcep);
}
public static double[] mlsadf(double[] wavform, double[] mcep,
int order = 25, double alpha = 0.35, int frame_period = 100, int i_period = 1, int pade = 4,
bool is_tranpose = false, bool is_invrese = false, bool is_coef_b = false, bool is_without_gain = false)
{
IntPtr ptr_y = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(double)) * wavform.Length);
var length = DoubleDefinitions.SPTK_mlsadf(wavform, wavform.Length, mcep, mcep.Length, order, alpha, frame_period, i_period, pade, is_tranpose ? 1 : 0, is_invrese ? 1 : 0, is_coef_b ? 1 : 0, is_without_gain ? 1 : 0, ptr_y);
var y = new double[length];
Marshal.Copy(ptr_y, y, 0, y.Length);
Marshal.FreeHGlobal(ptr_y);
return(y);
}
public static double[] mgcep(double[] spectrum,
double alpha = 0.35, double gamma = 0.0, int order = 25, int fft_length = 256,
int itype = 0, int otype = 0, int min_iter = 2, int max_iter = 30, int recursions = -1,
double eps = 0.0, double end_cond = 0.001, int etype = 0, double min_det = 0.000001)
{
var f0_length = spectrum.Length / (fft_length / 2 + 1);
var mcep = new double[(order + 1) * f0_length];
IntPtr ptr_mcep = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(double)) * mcep.Length);
DoubleDefinitions.SPTK_mgcep(spectrum, spectrum.Length, alpha, gamma, order, fft_length,
itype, otype, min_iter, max_iter, recursions, eps, end_cond, etype, min_det, ptr_mcep);
Marshal.Copy(ptr_mcep, mcep, 0, mcep.Length);
Marshal.FreeHGlobal(ptr_mcep);
return(mcep);
}
