| /* |
| * Header file for hardcoded AAC cube-root table |
| * |
| * Copyright (c) 2010 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_TABLEGEN_H |
| #define AVCODEC_CBRT_TABLEGEN_H |
| |
| #include <stdint.h> |
| #include <math.h> |
| |
| #if CONFIG_HARDCODED_TABLES |
| #define cbrt_tableinit() |
| #include "libavcodec/cbrt_tables.h" |
| #else |
| static uint32_t cbrt_tab[1 << 13]; |
| |
| static void cbrt_tableinit(void) |
| { |
| if (!cbrt_tab[(1<<13) - 1]) { |
| int i; |
| for (i = 0; i < 1<<13; i++) { |
| union { |
| float f; |
| uint32_t i; |
| } f; |
| f.f = cbrtf(i) * i; |
| cbrt_tab[i] = f.i; |
| } |
| } |
| } |
| #endif /* CONFIG_HARDCODED_TABLES */ |
| |
| #endif /* AVCODEC_CBRT_TABLEGEN_H */ |