celp_math.h

/*
 * Various fixed-point math operations
 *
 * Copyright (c) 2008 Vladimir Voroshilov
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_CELP_MATH_H
#define AVCODEC_CELP_MATH_H

#include <stdint.h>

typedef struct CELPMContext {
    float (*dot_productf)(const float* a, const float* b, int length);

}CELPMContext;

void ff_celp_math_init(CELPMContext *c);
void ff_celp_math_init_mips(CELPMContext *c);

int ff_exp2(uint16_t power);

int ff_log2_q15(uint32_t value);

int64_t ff_dot_product(const int16_t *a, const int16_t *b, int length);

static inline int bidir_sal(int value, int offset)
{
    if(offset < 0) return value >> -offset;
    else           return value <<  offset;
}

float ff_dot_productf(const float* a, const float* b, int length);

#endif /* AVCODEC_CELP_MATH_H */