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#include"Python.h"
#include"structmember.h"
#include<string.h>
#include "numpy/arrayobject.h"
#ifdef LINUX
#define _FILE_OFFSET_BITS 64
#endif
#define DEBUG(a)
/* The error object to expose
*/
static PyObject *ErrorObject;
#define onError(message)\
{ PyErr_SetString(ErrorObject, message); return NULL;}
#define __CCD_Filter_name__ "interpola_filter"
#define __init__Filter__ initinterpola_filter
static char Filter_doc[]="";
static PyObject *
Filter(PyObject *self_a, PyObject *args)
{
PyObject * A ;
PyObject * pos_ ;
PyObject * siz_ ;
PyObject * pos ;
PyObject * siz ;
PyObject * tmp;
char msg[400];
int x0_,x1_, x0,x1, s0_,s1_,s0,s1;
int X0,X1,X0_, X1_;
int dim0, dim1;
int nsum;
int ds;
int c0 = 0, c1 = 0;
int c0_,c1_;
float temp[9];
float swap;
int bool;
int count;
PyObject * dic_key;
PyObject * dic_value;
double threshold ;
int i;
int *iptr[] = { &x0_ , &x1_ ,&x0 , &x1 , &s0_ , &s1_ , &s0 , &s1 };
int shift_x[] = { -1,-1,-1, 0, 0, 0, 1, 1, 1 };
int shift_y[] = { -1, 0, 1,-1, 0, 1,-1, 0, 1 };
int si;
PyObject ** containers[] = {&pos_ , &pos, &siz_, &siz };
float * a_data;
float * m_data;
double shift;
double fact1, fact2;
int ishift1, ishift2;
if(!PyArg_ParseTuple(args,"OOOOOf:CDD_Filter",&A,&pos_,&siz_, &pos, &siz, &shift ))
return NULL;
/* check the Objects */
if(!PyArray_Check(A )) onError("not a PyArray, argument 1");
if(!PyList_Check (pos_ ) ) onError("not a PyList, argument 2");
if(!PyList_Check (siz_ )) onError("not a PyList, argument 3");
if(!PyList_Check (pos )) onError("not a PyList, argument 4");
if(!PyList_Check(siz )) onError("not a PyList, argument 5");
/* check the types */
if( ((PyArrayObject *) A ) ->descr->type_num != PyArray_FLOAT ) onError(" arg 1 is not an array of float " ) ;
/* check n of dimensione */
if( ((PyArrayObject *) A)->nd !=2) onError(" arg 1 is not a matrix " ) ;
/* check contiguity */
if( ((PyArrayObject *) A) ->flags %2 == 0) onError(" array has to be contiguous");
a_data = (float *) ((PyArrayObject *) A)->data;
/* getting positions and sizes */
for (i=0; i<8; i++) {
tmp = PyList_GetItem( *(containers[i/2]) , i%2);
if(!PyInt_Check( tmp )) {
sprintf(msg, " not an integer, item %d of argument %d", i%2, i/2+2);
onError(msg);
}
*iptr[i] = PyInt_AS_LONG( tmp );
}
/* setting better the limits ( they were indexed by iptr )*/
x0 = x0 - x0_ ;
x1 = x1 - x1_ ;
x0_ = 0 ;
x1_ = 0 ;
X0 = x0 + s0 ;
X1 = x1 + s1 ;
X0_ = x0_ + s0_ ;
X1_ = x1_ + s1_ ;
/* checking that the supllied limits are not completely wrong */
if ( ((PyArrayObject *) A)->dimensions[0] != s0_ || ((PyArrayObject *) A)->dimensions[1] != s1_ ) {
onError(" array dimension and supplied limits are not consistent");
}
dim0 = s0_;
dim1 = s1_;
/* straighforward addressing scheme in case of contiguous memory. Or you'll need to use strides */
m_data=(float*) malloc( dim0*dim1 * sizeof(float) ) ;
memset(m_data , 0 , dim0*dim1*sizeof(float) );
#define AA(i,j) a_data[(i)*dim1+(j) ]
#define MM(i,j) m_data[(i)*dim1+(j) ]
ishift1= (int) shift;
if(shift<0) ishift1--;
ishift2= ishift1+1;
fact1 = ishift2-shift;
fact2 = shift-ishift1;
if( x0 !=0 ) { /* verticale */
for(c0=x0 ; c0< X0 ; c0++) {
if( c0+ishift1 < x0_ || c0+ishift2 >= X0_ ) {
MM(c0,c1) =AA(c0,c1) ;
} else {
for(c1=x1; c1< X1 ; c1++) {
MM(c0,c1) = fact1 * AA(c0+ishift1, c1) + fact2 * AA( c0+ishift2, c1);
}
}
}
} else {
for(c1=x1 ; c1< X1 ; c1++) {
if( c1+ishift1 < x1_ || c1+ishift2 >= X1_ ) {
MM(c0,c1) =AA(c0,c1) ;
} else {
for(c0=x0; c0< X0 ; c0++) {
MM(c0,c1) = fact1 * AA(c0, c1+ishift1) + fact2 * AA( c0, c1+ishift2);
}
}
}
}
memcpy( a_data, m_data, dim0*dim1*sizeof(float) );
free(m_data);
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef CCD_Filter_functions [] = {
{"Filter", Filter, METH_VARARGS, Filter_doc},
{ NULL, NULL}
};
void
__init__Filter__ ()
{
PyObject *m, *d;
m = Py_InitModule( __CCD_Filter_name__ , CCD_Filter_functions );
d = PyModule_GetDict(m);
ErrorObject = Py_BuildValue("s", __CCD_Filter_name__ ".error");
PyDict_SetItemString(d,"error", ErrorObject);
if(PyErr_Occurred())
Py_FatalError("can't initialize module " __CCD_Filter_name__ );
#ifdef import_array
import_array();
#endif
}
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