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#define NO_IMPORT_ARRAY
#include "sigtools.h"
static int elsizes[] = {sizeof(Bool),
sizeof(byte),
sizeof(ubyte),
sizeof(short),
sizeof(ushort),
sizeof(int),
sizeof(uint),
sizeof(long),
sizeof(ulong),
sizeof(longlong),
sizeof(ulonglong),
sizeof(float),
sizeof(double),
sizeof(longdouble),
sizeof(cfloat),
sizeof(cdouble),
sizeof(clongdouble),
sizeof(void *),
0,0,0,0};
typedef void (OneMultAddFunction) (char *, char *, char *);
#define MAKE_ONEMULTADD(fname, type) \
static void fname ## _onemultadd(char *sum, char *term1, char *term2) { \
(*((type *) sum)) += (*((type *) term1)) * \
(*((type *) term2)); return; }
MAKE_ONEMULTADD(UBYTE, ubyte)
MAKE_ONEMULTADD(USHORT, ushort)
MAKE_ONEMULTADD(UINT, uint)
MAKE_ONEMULTADD(ULONG, ulong)
MAKE_ONEMULTADD(ULONGLONG, ulonglong)
MAKE_ONEMULTADD(BYTE, byte)
MAKE_ONEMULTADD(SHORT, short)
MAKE_ONEMULTADD(INT, int)
MAKE_ONEMULTADD(LONG, long)
MAKE_ONEMULTADD(LONGLONG, longlong)
MAKE_ONEMULTADD(FLOAT, float)
MAKE_ONEMULTADD(DOUBLE, double)
MAKE_ONEMULTADD(LONGDOUBLE, longdouble)
#ifdef __GNUC__
MAKE_ONEMULTADD(CFLOAT, __complex__ float)
MAKE_ONEMULTADD(CDOUBLE, __complex__ double)
MAKE_ONEMULTADD(CLONGDOUBLE, __complex__ long double)
#else
#define MAKE_C_ONEMULTADD(fname, type) \
static void fname ## _onemultadd(char *sum, char *term1, char *term2) { \
((type *) sum)[0] += ((type *) term1)[0] * ((type *) term2)[0] \
- ((type *) term1)[1] * ((type *) term2)[1]; \
((type *) sum)[1] += ((type *) term1)[0] * ((type *) term2)[1] \
+ ((type *) term1)[1] * ((type *) term2)[0]; \
return; }
MAKE_C_ONEMULTADD(CFLOAT, float)
MAKE_C_ONEMULTADD(CDOUBLE, double)
MAKE_C_ONEMULTADD(CLONGDOUBLE, longdouble)
#endif /* __GNUC__ */
static OneMultAddFunction *OneMultAdd[]={NULL,
BYTE_onemultadd,
UBYTE_onemultadd,
SHORT_onemultadd,
USHORT_onemultadd,
INT_onemultadd,
UINT_onemultadd,
LONG_onemultadd,
ULONG_onemultadd,
LONGLONG_onemultadd,
ULONGLONG_onemultadd,
FLOAT_onemultadd,
DOUBLE_onemultadd,
LONGDOUBLE_onemultadd,
CFLOAT_onemultadd,
CDOUBLE_onemultadd,
CLONGDOUBLE_onemultadd,
NULL, NULL, NULL, NULL};
/* This could definitely be more optimized... */
int pylab_convolve_2d (char *in, /* Input data Ns[0] x Ns[1] */
intp *instr, /* Input strides */
char *out, /* Output data */
intp *outstr, /* Ouput strides */
char *hvals, /* coefficients in filter */
intp *hstr, /* coefficients strides */
intp *Nwin, /* Size of kernel Nwin[0] x Nwin[1] */
intp *Ns, /* Size of image Ns[0] x Ns[1] */
int flag, /* convolution parameters */
char *fillvalue) /* fill value */
{
int bounds_pad_flag = 0;
int m, n, j, k, ind0, ind1;
int Os[2];
char *sum=NULL, *value=NULL;
int new_m, new_n, ind0_memory=0;
int boundary, outsize, convolve, type_num, type_size;
OneMultAddFunction *mult_and_add;
boundary = flag & BOUNDARY_MASK; /* flag can be fill, reflecting, circular */
outsize = flag & OUTSIZE_MASK;
convolve = flag & FLIP_MASK;
type_num = (flag & TYPE_MASK) >> TYPE_SHIFT;
/*type_size*/
mult_and_add = OneMultAdd[type_num];
if (mult_and_add == NULL) return -5; /* Not available for this type */
if (type_num < 0 || type_num > MAXTYPES) return -4; /* Invalid type */
type_size = elsizes[type_num];
if ((sum = calloc(type_size,2))==NULL) return -3; /* No memory */
value = sum + type_size;
if (outsize == FULL) {Os[0] = Ns[0]+Nwin[0]-1; Os[1] = Ns[1]+Nwin[1]-1;}
else if (outsize == SAME) {Os[0] = Ns[0]; Os[1] = Ns[1];}
else if (outsize == VALID) {Os[0] = Ns[0]-Nwin[0]+1; Os[1] = Ns[1]-Nwin[1]+1;}
else return -1; /* Invalid output flag */
if ((boundary != PAD) && (boundary != REFLECT) && (boundary != CIRCULAR))
return -2; /* Invalid boundary flag */
/* Speed this up by not doing any if statements in the for loop. Need 3*3*2=18 different
loops executed for different conditions */
for (m=0; m < Os[0]; m++) {
/* Reposition index into input image based on requested output size */
if (outsize == FULL) new_m = convolve ? m : (m-Nwin[0]+1);
else if (outsize == SAME) new_m = convolve ? (m+((Nwin[0]-1)>>1)) : (m-((Nwin[0]-1) >> 1));
else new_m = convolve ? (m+Nwin[0]-1) : m; /* VALID */
for (n=0; n < Os[1]; n++) { /* loop over columns */
memset(sum, 0, type_size); /* sum = 0.0; */
if (outsize == FULL) new_n = convolve ? n : (n-Nwin[1]+1);
else if (outsize == SAME) new_n = convolve ? (n+((Nwin[1]-1)>>1)) : (n-((Nwin[1]-1) >> 1));
else new_n = convolve ? (n+Nwin[1]-1) : n;
/* Sum over kernel, if index into image is out of bounds
handle it according to boundary flag */
for (j=0; j < Nwin[0]; j++) {
ind0 = convolve ? (new_m-j): (new_m+j);
bounds_pad_flag = 0;
if (ind0 < 0) {
if (boundary == REFLECT) ind0 = -1-ind0;
else if (boundary == CIRCULAR) ind0 = Ns[0] + ind0;
else bounds_pad_flag = 1;
}
else if (ind0 >= Ns[0]) {
if (boundary == REFLECT) ind0 = Ns[0]+Ns[0]-1-ind0;
else if (boundary == CIRCULAR) ind0 = ind0 - Ns[0];
else bounds_pad_flag = 1;
}
if (!bounds_pad_flag) ind0_memory = ind0*instr[0];
for (k=0; k < Nwin[1]; k++) {
if (bounds_pad_flag) memcpy(value,fillvalue,type_size);
else {
ind1 = convolve ? (new_n-k) : (new_n+k);
if (ind1 < 0) {
if (boundary == REFLECT) ind1 = -1-ind1;
else if (boundary == CIRCULAR) ind1 = Ns[1] + ind1;
else bounds_pad_flag = 1;
}
else if (ind1 >= Ns[1]) {
if (boundary == REFLECT) ind1 = Ns[1]+Ns[1]-1-ind1;
else if (boundary == CIRCULAR) ind1 = ind1 - Ns[1];
else bounds_pad_flag = 1;
}
if (bounds_pad_flag) memcpy(value, fillvalue, type_size);
else memcpy(value, in+ind0_memory+ind1*instr[1], type_size);
bounds_pad_flag = 0;
}
mult_and_add(sum, hvals+j*hstr[0]+k*hstr[1], value);
}
memcpy(out+m*outstr[0]+n*outstr[1], sum, type_size);
}
}
}
free(sum);
return 0;
}
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