You've already forked FFmpeg
mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-11-23 21:54:53 +02:00
2611874a50
Namely the part that creates a temporary LUT. Reviewed-by: Zhao Zhili <quinkblack@foxmail.com> Reviewed-by: Lynne <dev@lynne.ee> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
|
|
* 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
|