yading@10: /*
yading@10:  * Header file for hardcoded AAC cube-root table
yading@10:  *
yading@10:  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_CBRT_TABLEGEN_H
yading@10: #define AVCODEC_CBRT_TABLEGEN_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: #include <math.h>
yading@10: 
yading@10: #if CONFIG_HARDCODED_TABLES
yading@10: #define cbrt_tableinit()
yading@10: #include "libavcodec/cbrt_tables.h"
yading@10: #else
yading@10: static uint32_t cbrt_tab[1 << 13];
yading@10: 
yading@10: static void cbrt_tableinit(void)
yading@10: {
yading@10:     if (!cbrt_tab[(1<<13) - 1]) {
yading@10:         int i;
yading@10:         for (i = 0; i < 1<<13; i++) {
yading@10:             union {
yading@10:                 float f;
yading@10:                 uint32_t i;
yading@10:             } f;
yading@10:             f.f = cbrtf(i) * i;
yading@10:             cbrt_tab[i] = f.i;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: #endif /* CONFIG_HARDCODED_TABLES */
yading@10: 
yading@10: #endif /* AVCODEC_CBRT_TABLEGEN_H */