1 files changed, 59 insertions, 0 deletions
diff --git a/libs/audiographer/audiographer/utils.h b/libs/audiographer/audiographer/utils.h
new file mode 100644
index 0000000000..2f9c51918b
--- /dev/null
+++ b/libs/audiographer/audiographer/utils.h
@@ -0,0 +1,59 @@
+#ifndef AUDIOGRAPHER_UTILS_H
+#define AUDIOGRAPHER_UTILS_H
+
+#include "types.h"
+#include "exception.h"
+
+#include <cstring>
+
+namespace AudioGrapher
+{
+
+class Utils
+{
+  public:
+	
+	static void free_resources();
+	
+	/// Initialize zero buffer, if buffer is != 0, it will be used as the zero buffer
+	template <typename T>
+	static void init_zeros (nframes_t frames, T const * buffer = 0)
+	{
+		if (frames == 0) {
+			throw Exception (Utils(), "init_zeros must be called with an argument greater than zero.");
+		}
+		unsigned long n_zeros = frames * sizeof (T);
+		if (n_zeros <= num_zeros) { return; }
+		delete [] zeros;
+		if (buffer) {
+			zeros = reinterpret_cast<char const *>(buffer);
+		} else {
+			zeros = new char[n_zeros];
+			memset (const_cast<char *>(zeros), 0, n_zeros);
+		}
+		num_zeros = n_zeros;
+	}
+	  
+	template <typename T>
+	static T const * get_zeros (nframes_t frames)
+	{
+		if (frames * sizeof (T) > num_zeros) {
+			throw Exception (Utils(), "init_zeros has not been called with a large enough frame count");
+		}
+		return reinterpret_cast<T const *> (zeros);
+	}
+	
+	template <typename T>
+	static nframes_t get_zero_buffer_size ()
+	{
+		return num_zeros / sizeof (T);
+	}
+
+  private:
+	static char const *  zeros;
+	static unsigned long num_zeros;
+};
+
+} // namespace
+
+#endif // AUDIOGRAPHER_ROUTINES_H