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#include <stdlib.h>
#include <stdio.h>
#include <fftw3.h>
#ifdef DCT_TEST_USE_SINGLE
typedef float float_prec;
#define PF "%.7f"
#define FFTW_PLAN fftwf_plan
#define FFTW_MALLOC fftwf_malloc
#define FFTW_FREE fftwf_free
#define FFTW_PLAN_CREATE fftwf_plan_r2r_1d
#define FFTW_EXECUTE fftwf_execute
#define FFTW_DESTROY_PLAN fftwf_destroy_plan
#define FFTW_CLEANUP fftwf_cleanup
#else
typedef double float_prec;
#define PF "%.18f"
#define FFTW_PLAN fftw_plan
#define FFTW_MALLOC fftw_malloc
#define FFTW_FREE fftw_free
#define FFTW_PLAN_CREATE fftw_plan_r2r_1d
#define FFTW_EXECUTE fftw_execute
#define FFTW_DESTROY_PLAN fftw_destroy_plan
#define FFTW_CLEANUP fftw_cleanup
#endif
enum type {
DCT_I = 1,
DCT_II = 2,
DCT_III = 3,
DCT_IV = 4,
};
int gen(int type, int sz)
{
float_prec *a, *b;
FFTW_PLAN p;
int i, tp;
a = FFTW_MALLOC(sizeof(*a) * sz);
if (a == NULL) {
fprintf(stderr, "failure\n");
exit(EXIT_FAILURE);
}
b = FFTW_MALLOC(sizeof(*b) * sz);
if (b == NULL) {
fprintf(stderr, "failure\n");
exit(EXIT_FAILURE);
}
for(i=0; i < sz; ++i) {
a[i] = i;
}
switch(type) {
case DCT_I:
tp = FFTW_REDFT00;
break;
case DCT_II:
tp = FFTW_REDFT10;
break;
case DCT_III:
tp = FFTW_REDFT01;
break;
case DCT_IV:
tp = FFTW_REDFT11;
break;
default:
fprintf(stderr, "unknown type\n");
exit(EXIT_FAILURE);
}
p = FFTW_PLAN_CREATE(sz, a, b, tp, FFTW_ESTIMATE);
FFTW_EXECUTE(p);
FFTW_DESTROY_PLAN(p);
for(i=0; i < sz; ++i) {
printf(PF"\n", b[i]);
}
FFTW_FREE(b);
FFTW_FREE(a);
return 0;
}
int main(int argc, char* argv[])
{
int n, tp;
if (argc < 3) {
fprintf(stderr, "missing argument: program type n\n");
exit(EXIT_FAILURE);
}
tp = atoi(argv[1]);
n = atoi(argv[2]);
gen(tp, n);
FFTW_CLEANUP();
return 0;
}
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