2 * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
4 * This file is part of libass.
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #ifndef LIBASS_UTILS_H
20 #define LIBASS_UTILS_H
42 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
43 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
44 #define FFMINMAX(c,a,b) FFMIN(FFMAX(c, a), b)
46 int mystrtoi(char **p, int *res);
47 int mystrtoll(char **p, long long *res);
48 int mystrtou32(char **p, int base, uint32_t *res);
49 int mystrtod(char **p, double *res);
50 int strtocolor(ASS_Library *library, char **q, uint32_t *res, int hex);
51 char parse_bool(char *str);
52 unsigned ass_utf8_get_char(char **str);
53 void ass_msg(ASS_Library *priv, int lvl, char *fmt, ...);
55 void *ass_guess_buffer_cp(ASS_Library *library, unsigned char *buffer,
56 int buflen, char *preferred_language,
60 /* defined in ass_strtod.c */
61 double ass_strtod(const char *string, char **endPtr);
63 static inline int d6_to_int(int x)
67 static inline int d16_to_int(int x)
69 return (x + 32768) >> 16;
71 static inline int int_to_d6(int x)
75 static inline int int_to_d16(int x)
79 static inline int d16_to_d6(int x)
81 return (x + 512) >> 10;
83 static inline int d6_to_d16(int x)
87 static inline double d6_to_double(int x)
91 static inline int double_to_d6(double x)
93 return (int) (x * 64);
95 static inline double d16_to_double(int x)
97 return ((double) x) / 0x10000;
99 static inline int double_to_d16(double x)
101 return (int) (x * 0x10000);
103 static inline double d22_to_double(int x)
105 return ((double) x) / 0x400000;
107 static inline int double_to_d22(double x)
109 return (int) (x * 0x400000);
112 // Calculate cache key for a rotational angle in degrees
113 static inline int rot_key(double a)
115 const int m = double_to_d22(360.0);
116 return double_to_d22(a) % m;
119 #define FNV1_32A_INIT (unsigned)0x811c9dc5
121 static inline unsigned fnv_32a_buf(void *buf, size_t len, unsigned hval)
123 unsigned char *bp = buf;
124 unsigned char *be = bp + len;
126 hval ^= (unsigned) *bp++;
128 (hval << 1) + (hval << 4) + (hval << 7) + (hval << 8) +
133 static inline unsigned fnv_32a_str(char *str, unsigned hval)
135 unsigned char *s = (unsigned char *) str;
137 hval ^= (unsigned) *s++;
139 (hval << 1) + (hval << 4) + (hval << 7) + (hval << 8) +
145 #endif /* LIBASS_UTILS_H */