sekai/src/sekai/common.h

/*
  Sekai - addons for the WORLD speech toolkit
  Copyright (C) 2016 Tobias Platen

  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/>.
*/

#ifndef SEKAI_COMMON_H
#define SEKAI_COMMON_H

#define LOG10 2.3025850929940459 /*!< natural logarithm of 10 */
#define TWENTY_OVER_LOG10 (20. / LOG10)
#define Np2dB(x) (TWENTY_OVER_LOG10 * (x))
#define dB2Np(x) ((x) / TWENTY_OVER_LOG10)

#define likely(x) __builtin_expect((x), 1)
#define unlikely(x) __builtin_expect((x), 0)

float interp_linear(float *x, float *y, int nx, float ref);
double interp_linear(double *x, double *y, int nx, double ref);

#endif