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42 lines
1.3 KiB
42 lines
1.3 KiB
/* |
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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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#include "libavutil/common.h" |
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// clip a signed integer into the (-2^23), (2^23-1) range |
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static inline int dca_clip23(int a) |
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{ |
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return av_clip_intp2(a, 23); |
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} |
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static inline int32_t dca_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 int64_t dca_round(int64_t a, int bits) |
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{ |
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if (bits > 0) |
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return (a + (INT64_C(1) << (bits - 1))) & ~((INT64_C(1) << bits) - 1); |
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else |
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return a; |
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}
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