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TencentCloudHuiyanSDKFace_framework/Libs/YTCv.framework/Headers/fast_math.hpp

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+// fbc_cv is free software and uses the same licence as OpenCV
+// Email: fengbingchun@163.com
+
+#ifndef FBC_CV_CORE_FAST_MATH_HPP_
+#define FBC_CV_CORE_FAST_MATH_HPP_
+
+// reference: include/opencv2/core/fast_math.hpp
+
+#include "fbcdef.hpp"
+
+namespace yt_tinycv {
+
+// Rounds floating-point number to the nearest integer
+static inline int fbcRound(double value)
+{
+	// it's ok if round does not comply with IEEE754 standard;
+	// it should allow +/-1 difference when the other functions use round
+	return (int)(value + (value >= 0 ? 0.5 : -0.5));
+}
+
+static inline int fbcRound(float value)
+{
+	// it's ok if round does not comply with IEEE754 standard;
+	// it should allow +/-1 difference when the other functions use round
+	return (int)(value + (value >= 0 ? 0.5f : -0.5f));
+}
+
+static inline int fbcRound(int value)
+{
+	return value;
+}
+
+// Rounds floating-point number to the nearest integer not larger than the original
+static inline int fbcFloor(double value)
+{
+	int i = fbcRound(value);
+	float diff = (float)(value - i);
+	return i - (diff < 0);
+}
+
+static inline int fbcFloor(float value)
+{
+	int i = fbcRound(value);
+	float diff = (float)(value - i);
+	return i - (diff < 0);
+}
+
+static inline int fbcFloor(int value)
+{
+	return value;
+}
+
+// Rounds floating-point number to the nearest integer not smaller than the original
+static inline int fbcCeil(double value)
+{
+	int i = fbcRound(value);
+	float diff = (float)(i - value);
+	return i + (diff < 0);
+}
+
+static inline int fbcCeil(float value)
+{
+	int i = fbcRound(value);
+	float diff = (float)(i - value);
+	return i + (diff < 0);
+}
+
+static inline int fbcCeil(int value)
+{
+	return value;
+}
+
+} // yt_tinycv
+
+#endif // FBC_CV_CORE_FAST_MATH_HPP_