00001 /* 00002 * Various fixed-point math operations 00003 * 00004 * Copyright (c) 2008 Vladimir Voroshilov 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 #ifndef AVCODEC_CELP_MATH_H 00024 #define AVCODEC_CELP_MATH_H 00025 00026 #include <stdint.h> 00027 00028 typedef struct CELPMContext { 00037 float (*dot_productf)(const float* a, const float* b, int length); 00038 00039 }CELPMContext; 00040 00044 void ff_celp_math_init(CELPMContext *c); 00045 void ff_celp_math_init_mips(CELPMContext *c); 00046 00054 int ff_exp2(uint16_t power); 00055 00062 int ff_log2(uint32_t value); 00063 00071 static inline int bidir_sal(int value, int offset) 00072 { 00073 if(offset < 0) return value >> -offset; 00074 else return value << offset; 00075 } 00076 00085 int64_t ff_dot_product(const int16_t *a, const int16_t *b, int length); 00086 00095 float ff_dot_productf(const float* a, const float* b, int length); 00096 00097 #endif /* AVCODEC_CELP_MATH_H */
1.5.8