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/*
* Copyright (c) 2016 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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_CBRT_DATA_H
#define AVCODEC_CBRT_DATA_H
#include <stdint.h>
#define LUT_SIZE (1 << 13)
#ifndef BUILD_TABLES
#include "config.h"
#define BUILD_TABLES !CONFIG_HARDCODED_TABLES
#endif
#if !BUILD_TABLES
#define ff_cbrt_tableinit_fixed()
#define ff_cbrt_tableinit()
extern const uint32_t ff_cbrt_tab[LUT_SIZE];
extern const uint32_t ff_cbrt_tab_fixed[LUT_SIZE];
#else
void ff_cbrt_tableinit(void);
void ff_cbrt_tableinit_fixed(void);
#define TMP_LUT_SIZE (LUT_SIZE / 2)
/**
* Creates a LUT (of doubles) for the powers of
* the odd integers: tmp_lut[idx] will be set to (2 * idx + 1)^{4/3}.
*/
void ff_cbrt_dbl_tableinit(double tmp_lut[TMP_LUT_SIZE]);
extern union CBRT {
uint32_t cbrt_tab[LUT_SIZE];
double tmp[TMP_LUT_SIZE];
} ff_cbrt_tab_internal, ff_cbrt_tab_internal_fixed;
#define ff_cbrt_tab ff_cbrt_tab_internal.cbrt_tab
#define ff_cbrt_tab_fixed ff_cbrt_tab_internal_fixed.cbrt_tab
#endif
#endif
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