celp_math.h
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1 /*
2  * Various fixed-point math operations
3  *
4  * Copyright (c) 2008 Vladimir Voroshilov
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav 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 GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVCODEC_CELP_MATH_H
24 #define AVCODEC_CELP_MATH_H
25 
26 #include <stdint.h>
27 
34 int16_t ff_cos(uint16_t arg);
35 
43 int ff_exp2(uint16_t power);
44 
51 int ff_log2(uint32_t value);
52 
60 static inline int bidir_sal(int value, int offset)
61 {
62  if(offset < 0) return value >> -offset;
63  else return value << offset;
64 }
65 
74 float ff_dot_productf(const float* a, const float* b, int length);
75 
76 #endif /* AVCODEC_CELP_MATH_H */