comparison src/Support/ERBTools.h @ 0:582cbe817f2c

- Initial add of support code and modules. Not everything is working yet.

+// Copyright 2006-2010, Thomas Walters
+//
+// AIM-C: A C++ implementation of the Auditory Image Model
+// http://www.acousticscale.org/AIMC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+/*! \file
+ *  \brief
+ */
+
+/*! \author: Thomas Walters <[e-mail]>
+ *  \date 2010/01/23
+ *  \version \$Id: ERBTools.h 1 2010-02-02 11:04:50Z tcw $
+ */
+
+#ifndef _AIMC_SUPPORT_ERBTOOLS_H_
+#define _AIMC_SUPPORT_ERBTOOLS_H_
+
+#include <math.h>
+
+namespace aimc {
+class ERBTools {
+ public:
+  static float Freq2ERB(float freq) {
+    return 21.4f * log10(4.37f * freq / 1000.0f + 1.0f);
+  }
+
+  static float Freq2ERBw(float freq) {
+    return 24.7f * (4.37f * freq / 1000.0f + 1.0f);
+  }
+};
+}
+
+#endif  // _AIMC_SUPPORT_ERBTOOLS_H_