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46 lines
1.2 KiB
46 lines
1.2 KiB
/* |
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* Copyright (c) 2010 Mans Rullgard <mans@mansr.com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_INTMATH_H |
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#define AVUTIL_INTMATH_H |
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#include "config.h" |
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#include "attributes.h" |
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/** |
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* @addtogroup lavu_internal |
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* @{ |
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*/ |
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#if HAVE_FAST_CLZ && AV_GCC_VERSION_AT_LEAST(3,4) |
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#ifndef av_log2 |
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# define av_log2(x) (31 - __builtin_clz((x)|1)) |
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# ifndef av_log2_16bit |
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# define av_log2_16bit av_log2 |
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# endif |
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#endif /* av_log2 */ |
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#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */ |
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/** |
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* @} |
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*/ |
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#endif /* AVUTIL_INTMATH_H */
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