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55 lines
2.0 KiB
55 lines
2.0 KiB
/* |
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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 clip23(int32_t a) { return av_clip_intp2(a, 23); } |
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#endif
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