added Ooura implementation to repository

1 files changed, 13 insertions, 5 deletions

diff --git a/src/helper.c b/src/helper.c
index e9e79e5..4fd9975 100644
--- a/src/helper.c
+++ b/src/helper.c
@@ -1,5 +1,5 @@
 /* libxtract feature extraction library
- *  
+ *
  * Copyright (C) 2006 Jamie Bullock
  *
  * This program is free software; you can redistribute it and/or modify
@@ -14,7 +14,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  * USA.
  */
 
@@ -33,7 +33,8 @@
 #define INDEX 1
 #endif
 
-int xtract_windowed(const float *data, const int N, const void *argv, float *result){
+int xtract_windowed(const float *data, const int N, const void *argv, float *result)
+{
 
     int n;
     const float *window;
@@ -48,7 +49,8 @@ int xtract_windowed(const float *data, const int N, const void *argv, float *res
 
 }
 
-int xtract_features_from_subframes(const float *data, const int N, const int feature, const void *argv, float *result){
+int xtract_features_from_subframes(const float *data, const int N, const int feature, const void *argv, float *result)
+{
 
     const float *frame1,
           *frame2;
@@ -73,7 +75,8 @@ int xtract_features_from_subframes(const float *data, const int N, const int fea
 
 }
 
-inline int xtract_is_denormal(double const d){
+inline int xtract_is_denormal(double const d)
+{
     if(sizeof(d) != 2 * sizeof(int))
         fprintf(stderr, "libxtract: Error: xtract_is_denormal() detects inconsistent wordlength for type 'double'\n");
 
@@ -81,3 +84,8 @@ inline int xtract_is_denormal(double const d){
     return (l&0x7ff00000) == 0 && d!=0; //Check for 0 may not be necessary
 }
 
+inline bool xtract_is_poweroftwo(unsigned int x)
+{
+    return ((x != 0) && !(x & (x - 1)));
+}
+