commit : DWPT and Wavelet Tree added

test/dwpttest.c

@@ -0,0 +1,61 @@
+#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() {
+	int i, J, N;
+	wave_object obj;
+	wpt_object wt;
+	double *inp, *oup, *diff;
+
+	char *name = "db4";
+	obj = wave_init(name);// Initialize the wavelet
+	N = 788 + 23;
+	inp = (double*)malloc(sizeof(double)* N);
+	oup = (double*)malloc(sizeof(double)* N);
+	diff = (double*)malloc(sizeof(double)* N);
+	for (i = 1; i < N + 1; ++i) {
+		//inp[i - 1] = -0.25*i*i*i + 25 * i *i + 10 * i;
+		inp[i - 1] = i;
+	}
+	J = 4;
+
+	wt = wpt_init(obj, N, J);// Initialize the wavelet transform Tree object
+	setDWPTExtension(wt, "per");// Options are "per" and "sym". Symmetric is the default option
+	setDWPTEntropy(wt, "logenergy", 0);
+
+	dwpt(wt, inp); // Discrete Wavelet Packet Transform
+
+	idwpt(wt, oup); // Inverse Discrete Wavelet Packet Transform
+
+	for (i = 0; i < N; ++i) {
+		diff[i] = (inp[i] - oup[i])/inp[i];
+	}
+
+	wpt_summary(wt); // Tree Summary
+
+	printf("\n MAX %g \n", absmax(diff, wt->siglength)); // If Reconstruction succeeded then the output should be a small value.
+
+	free(inp);
+	free(oup);
+	free(diff);
+	wave_free(obj);
+	wpt_free(wt);
+	return 0;
+}