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https://chromium.googlesource.com/libyuv/libyuv
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f2f9dbb644
BUG=none TEST=FixedDiv* R=johannkoenig@google.com Review URL: https://webrtc-codereview.appspot.com/1668004 git-svn-id: http://libyuv.googlecode.com/svn/trunk@727 16f28f9a-4ce2-e073-06de-1de4eb20be90
37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
/*
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* Copyright 2013 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef INCLUDE_LIBYUV_FIXED_MATH_H_ // NOLINT
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#define INCLUDE_LIBYUV_FIXED_MATH_H_
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#include "libyuv/basic_types.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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extern const float kRecipTable[4097];
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// Divide num by div and return value as 16.16 fixed point.
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static __inline int FixedDiv(int num, int div) {
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if (static_cast<unsigned int>(div) <= 4096u) {
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return static_cast<int>(num * kRecipTable[div]);
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}
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return static_cast<int>((static_cast<int64>(num) << 16) / div);
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}
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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#endif // INCLUDE_LIBYUV_FIXED_MATH_H_ NOLINT
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