Commit : Code Added

test/swttest.c

@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "../header/wavelib.h"
+
+double absmax(double *array, int N) {
+	double max;
+	int i;
+
+	max = 0.0;
+	for (i = 0; i < N; ++i) {
+		if (fabs(array[i]) >= max) {
+			max = fabs(array[i]);
+		}
+	}
+
+	return max;
+}
+
+int main() {
+	wave_object obj;
+	wt_object wt;
+	double *inp, *out, *diff;
+	int N, i, J;
+
+	FILE *ifp;
+	double temp[1200];
+
+	char *name = "bior3.5";
+	obj = wave_init(name);// Initialize the wavelet
+
+	ifp = fopen("signal.txt", "r");
+	i = 0;
+	if (!ifp) {
+		printf("Cannot Open File");
+		exit(100);
+	}
+	while (!feof(ifp)) {
+		fscanf(ifp, "%lf \n", &temp[i]);
+		i++;
+	}
+	N = 256;
+
+	inp = (double*)malloc(sizeof(double)* N);
+	out = (double*)malloc(sizeof(double)* N);
+	diff = (double*)malloc(sizeof(double)* N);
+	//wmean = mean(temp, N);
+
+	for (i = 0; i < N; ++i) {
+		inp[i] = temp[i];
+		//printf("%g \n",inp[i]);
+	}
+	J = 1;
+
+	wt = wt_init(obj, "swt", N, J);// Initialize the wavelet transform object
+	setWTConv(wt, "direct");
+
+	
+	swt(wt, inp);// Perform SWT
+	//SWT output can be accessed using wt->output vector. Use wt_summary to find out how to extract appx and detail coefficients
+	
+	for (i = 0; i < wt->outlength; ++i) {
+		printf("%g ",wt->output[i]);
+	}
+
+	iswt(wt, out);// Perform ISWT (if needed)
+	// Test Reconstruction
+	
+
+	for (i = 0; i < wt->siglength; ++i) {
+		diff[i] = out[i] - inp[i];
+	}
+
+	printf("\n MAX %g \n", absmax(diff, wt->siglength));// If Reconstruction succeeded then the output should be a small value.
+	
+	wt_summary(wt);// Prints the full summary.
+
+
+	wave_free(obj);
+	wt_free(wt);
+
+	free(inp);
+	free(out);
+	free(diff);
+	return 0;
+}