mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
544f5a922f
10% faster flac decoding on x86 and ARM. Originally committed as revision 21217 to svn://svn.ffmpeg.org/ffmpeg/trunk
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
|
|
* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
|
|
*
|
|
* 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 AVUTIL_INTMATH_H
|
|
#define AVUTIL_INTMATH_H
|
|
|
|
#include "config.h"
|
|
#include "common.h"
|
|
|
|
#if HAVE_FAST_CLZ && AV_GCC_VERSION_AT_LEAST(3,4)
|
|
|
|
#ifndef av_log2
|
|
|
|
#define av_log2(x) (31 - __builtin_clz((x)|1))
|
|
|
|
#ifndef av_log2_16bit
|
|
#define av_log2_16bit av_log2
|
|
#endif
|
|
|
|
#endif /* av_log2 */
|
|
|
|
#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */
|
|
|
|
#endif /* AVUTIL_INTMATH_H */
|