57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
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/*
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* Copyright (C) 2016 foo86
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 AVCODEC_DCAMATH_H
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#define AVCODEC_DCAMATH_H
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#include "libavutil/common.h"
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#include "libavutil/intmath.h"
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static inline int32_t norm__(int64_t a, int bits)
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{
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if (bits > 0)
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return (int32_t)((a + (INT64_C(1) << (bits - 1))) >> bits);
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else
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return (int32_t)a;
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}
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static inline int32_t mul__(int32_t a, int32_t b, int bits)
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{
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return norm__((int64_t)a * b, bits);
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}
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static inline int32_t norm13(int64_t a) { return norm__(a, 13); }
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static inline int32_t norm16(int64_t a) { return norm__(a, 16); }
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static inline int32_t norm20(int64_t a) { return norm__(a, 20); }
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static inline int32_t norm21(int64_t a) { return norm__(a, 21); }
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static inline int32_t norm23(int64_t a) { return norm__(a, 23); }
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static inline int32_t mul15(int32_t a, int32_t b) { return mul__(a, b, 15); }
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static inline int32_t mul16(int32_t a, int32_t b) { return mul__(a, b, 16); }
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static inline int32_t mul17(int32_t a, int32_t b) { return mul__(a, b, 17); }
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static inline int32_t mul22(int32_t a, int32_t b) { return mul__(a, b, 22); }
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static inline int32_t mul23(int32_t a, int32_t b) { return mul__(a, b, 23); }
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static inline int32_t mul31(int32_t a, int32_t b) { return mul__(a, b, 31); }
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static inline int32_t mul32(int32_t a, int32_t b) { return mul__(a, b, 32); }
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static inline int32_t clip23(int32_t a) { return av_clip_intp2(a, 23); }
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#endif
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