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151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fftw3.h>
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#if DCT_TEST_PRECISION == 1
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typedef float float_prec;
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#define PF "%.7f"
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#define FFTW_PLAN fftwf_plan
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#define FFTW_MALLOC fftwf_malloc
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#define FFTW_FREE fftwf_free
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#define FFTW_PLAN_CREATE fftwf_plan_r2r_1d
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#define FFTW_EXECUTE fftwf_execute
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#define FFTW_DESTROY_PLAN fftwf_destroy_plan
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#define FFTW_CLEANUP fftwf_cleanup
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#elif DCT_TEST_PRECISION == 2
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typedef double float_prec;
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#define PF "%.18f"
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#define FFTW_PLAN fftw_plan
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#define FFTW_MALLOC fftw_malloc
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#define FFTW_FREE fftw_free
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#define FFTW_PLAN_CREATE fftw_plan_r2r_1d
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#define FFTW_EXECUTE fftw_execute
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#define FFTW_DESTROY_PLAN fftw_destroy_plan
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#define FFTW_CLEANUP fftw_cleanup
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#elif DCT_TEST_PRECISION == 3
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typedef long double float_prec;
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#define PF "%.18Lf"
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#define FFTW_PLAN fftwl_plan
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#define FFTW_MALLOC fftwl_malloc
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#define FFTW_FREE fftwl_free
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#define FFTW_PLAN_CREATE fftwl_plan_r2r_1d
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#define FFTW_EXECUTE fftwl_execute
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#define FFTW_DESTROY_PLAN fftwl_destroy_plan
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#define FFTW_CLEANUP fftwl_cleanup
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#else
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#error DCT_TEST_PRECISION must be a number 1-3
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#endif
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enum type {
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DCT_I = 1,
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DCT_II = 2,
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DCT_III = 3,
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DCT_IV = 4,
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DST_I = 5,
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DST_II = 6,
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DST_III = 7,
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DST_IV = 8,
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};
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int gen(int type, int sz)
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{
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float_prec *a, *b;
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FFTW_PLAN p;
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int i, tp;
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a = FFTW_MALLOC(sizeof(*a) * sz);
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if (a == NULL) {
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fprintf(stderr, "failure\n");
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exit(EXIT_FAILURE);
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}
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b = FFTW_MALLOC(sizeof(*b) * sz);
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if (b == NULL) {
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fprintf(stderr, "failure\n");
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exit(EXIT_FAILURE);
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}
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switch(type) {
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case DCT_I:
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tp = FFTW_REDFT00;
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break;
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case DCT_II:
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tp = FFTW_REDFT10;
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break;
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case DCT_III:
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tp = FFTW_REDFT01;
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break;
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case DCT_IV:
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tp = FFTW_REDFT11;
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break;
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case DST_I:
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tp = FFTW_RODFT00;
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break;
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case DST_II:
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tp = FFTW_RODFT10;
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break;
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case DST_III:
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tp = FFTW_RODFT01;
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break;
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case DST_IV:
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tp = FFTW_RODFT11;
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break;
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default:
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fprintf(stderr, "unknown type\n");
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exit(EXIT_FAILURE);
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}
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switch(type) {
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case DCT_I:
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case DCT_II:
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case DCT_III:
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case DCT_IV:
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for(i=0; i < sz; ++i) {
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a[i] = i;
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}
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break;
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case DST_I:
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case DST_II:
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case DST_III:
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case DST_IV:
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/* TODO: what should we do for dst's?*/
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for(i=0; i < sz; ++i) {
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a[i] = i;
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}
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break;
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default:
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fprintf(stderr, "unknown type\n");
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exit(EXIT_FAILURE);
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}
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p = FFTW_PLAN_CREATE(sz, a, b, tp, FFTW_ESTIMATE);
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FFTW_EXECUTE(p);
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FFTW_DESTROY_PLAN(p);
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for(i=0; i < sz; ++i) {
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printf(PF"\n", b[i]);
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}
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FFTW_FREE(b);
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FFTW_FREE(a);
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return 0;
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}
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int main(int argc, char* argv[])
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{
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int n, tp;
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if (argc < 3) {
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fprintf(stderr, "missing argument: program type n\n");
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exit(EXIT_FAILURE);
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}
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tp = atoi(argv[1]);
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n = atoi(argv[2]);
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gen(tp, n);
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FFTW_CLEANUP();
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return 0;
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}
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