libass/ass_utils.h

   1 // -*- c-basic-offset: 8; indent-tabs-mode: t -*-
   2 // vim:ts=8:sw=8:noet:ai:
   3 /*
   4  * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
   5  *
   6  * This file is part of libass.
   7  *
   8  * libass is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * libass is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with libass; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #ifndef LIBASS_UTILS_H
  24 #define LIBASS_UTILS_H
  25
  26 #include <stdint.h>
  27
  28 int mystrtoi(char** p, int base, int* res);
  29 int mystrtou32(char** p, int base, uint32_t* res);
  30 int mystrtod(char** p, double* res);
  31 int strtocolor(char** q, uint32_t* res);
  32
  33 static inline int d6_to_int(int x) {
  34         return (x + 32) >> 6;
  35 }
  36 static inline int d16_to_int(int x) {
  37         return (x + 32768) >> 16;
  38 }
  39 static inline int int_to_d6(int x) {
  40         return x << 6;
  41 }
  42 static inline int int_to_d16(int x) {
  43         return x << 16;
  44 }
  45 static inline int d16_to_d6(int x) {
  46         return (x + 512) >> 10;
  47 }
  48 static inline int d6_to_d16(int x) {
  49         return x << 10;
  50 }
  51 static inline double d6_to_double(int x) {
  52         return x / 64.;
  53 }
  54 static inline int double_to_d6(double x) {
  55         return (int)(x * 64);
  56 }
  57 static inline double d16_to_double(int x) {
  58         return ((double)x) / 0x10000;
  59 }
  60 static inline int double_to_d16(double x) {
  61         return (int)(x * 0x10000);
  62 }
  63
  64 #endif /* LIBASS_UTILS_H */