Merge pull request #4 from slanoe/master

meyer coefficients added

src/wavefilt.c

@@ -3028,6 +3028,110 @@ static const double hm6_68[18] = {
     -0.016990639867602342, -0.0019142861290887667,
     0.0019088317364812906, 0.0 };
 
+static const double meyer[102] = {
+    -0.000001509740857,
+    0.000001278766757,
+    0.000000449585560,
+    -0.000002096568870,
+    0.000001723223554,
+    0.000000698082276,
+    -0.000002879408033,
+    0.000002383148395,
+    0.000000982515602,
+    -0.000004217789186,
+    0.000003353501538,
+    0.000001674721859,
+    -0.000006034501342,
+    0.000004837555802,
+    0.000002402288023,
+    -0.000009556309846,
+    0.000007216527695,
+    0.000004849078300,
+    -0.000014206928581,
+    0.000010503914271,
+    0.000006187580298,
+    -0.000024438005846,
+    0.000020106387691,
+    0.000014993523600,
+    -0.000046428764284,
+    0.000032341311914,
+    0.000037409665760,
+    -0.000102779005085,
+    0.000024461956845,
+    0.000149713515389,
+    -0.000075592870255,
+    -0.000139913148217,
+    -0.000093512893880,
+    0.000161189819725,
+    0.000859500213762,
+    -0.000578185795273,
+    -0.002702168733939,
+    0.002194775336459,
+    0.006045510596456,
+    -0.006386728618548,
+    -0.011044641900539,
+    0.015250913158586,
+    0.017403888210177,
+    -0.032094063354505,
+    -0.024321783959519,
+    0.063667300884468,
+    0.030621243943425,
+    -0.132696615358862,
+    -0.035048287390595,
+    0.444095030766529,
+    0.743751004903787,
+    0.444095030766529,
+    -0.035048287390595,
+    -0.132696615358862,
+    0.030621243943425,
+    0.063667300884468,
+    -0.024321783959519,
+    -0.032094063354505,
+    0.017403888210177,
+    0.015250913158586,
+    -0.011044641900539,
+    -0.006386728618548,
+    0.006045510596456,
+    0.002194775336459,
+    -0.002702168733939,
+    -0.000578185795273,
+    0.000859500213762,
+    0.000161189819725,
+    -0.000093512893880,
+    -0.000139913148217,
+    -0.000075592870255,
+    0.000149713515389,
+    0.000024461956845,
+    -0.000102779005085,
+    0.000037409665760,
+    0.000032341311914,
+    -0.000046428764284,
+    0.000014993523600,
+    0.000020106387691,
+    -0.000024438005846,
+    0.000006187580298,
+    0.000010503914271,
+    -0.000014206928581,
+    0.000004849078300,
+    0.000007216527695,
+    -0.000009556309846,
+    0.000002402288023,
+    0.000004837555802,
+    -0.000006034501342,
+    0.000001674721859,
+    0.000003353501538,
+    -0.000004217789186,
+    0.000000982515602,
+    0.000002383148395,
+    -0.000002879408033,
+    0.000000698082276,
+    0.000001723223554,
+    -0.000002096568870,
+    0.000000449585560,
+    0.000001278766757,
+    -0.000001509740857,
+    0.0};
+
 int filtlength(const char* name) {
     int len = strlen(name);
     int i = 0;
@@ -3187,6 +3291,9 @@ int filtlength(const char* name) {
         }
 
         return N * 2;
+    }
+    else if (!strcmp(name, "meyer")){
+        return 102;
     }
 	else {
 		printf("\n Filter Not in Database \n");
@@ -4192,6 +4299,13 @@ int filtcoef(const char* name, double *lp1, double *hp1, double *lp2, double *hp
         qmf_even(sym20, N, hp2);
         return N;
     }
+    else if (!strcmp(name, "meyer")){
+        copy_reverse(meyer, N, lp1);
+        qmf_wrev(meyer, N, hp1);
+        copy(meyer, N, lp2);
+        qmf_even(meyer, N, hp2);
+        return N;
+    }
 
 	else {
 		printf("\n Filter Not in Database \n");