00001 /* 00002 * Header file for hardcoded AAC cube-root table 00003 * 00004 * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> 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_CBRT_TABLEGEN_H 00024 #define AVCODEC_CBRT_TABLEGEN_H 00025 00026 #include <stdint.h> 00027 #include <math.h> 00028 00029 #if CONFIG_HARDCODED_TABLES 00030 #define cbrt_tableinit() 00031 #include "libavcodec/cbrt_tables.h" 00032 #else 00033 static uint32_t cbrt_tab[1 << 13]; 00034 00035 static void cbrt_tableinit(void) 00036 { 00037 if (!cbrt_tab[(1<<13) - 1]) { 00038 int i; 00039 for (i = 0; i < 1<<13; i++) { 00040 union { 00041 float f; 00042 uint32_t i; 00043 } f; 00044 f.f = cbrtf(i) * i; 00045 cbrt_tab[i] = f.i; 00046 } 00047 } 00048 } 00049 #endif /* CONFIG_HARDCODED_TABLES */ 00050 00051 #endif /* AVCODEC_CBRT_TABLEGEN_H */
1.5.8