提交SMOD ATSC IMX APP版本 V122

2026-07-16 14:35:59 +08:00
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+/*------------------------------------------------------------------------------
+  Copyright 2016-2018 Sony Semiconductor Solutions Corporation
+
+  Last Updated    : 2018/07/27
+  Modification ID : ff73ffebff57618d6a5aa6e2aa9eb009b86060d1
+------------------------------------------------------------------------------*/
+/**
+ @file  sony_math.h
+
+ @brief The mathematics functions used in this reference code.
+*/
+/*----------------------------------------------------------------------------*/
+
+#ifndef SONY_MATH_H_
+#define SONY_MATH_H_
+
+/*------------------------------------------------------------------------------
+ Includes
+------------------------------------------------------------------------------*/
+#include "sony_common.h"
+
+/*------------------------------------------------------------------------------
+ Defines
+------------------------------------------------------------------------------*/
+
+/*------------------------------------------------------------------------------
+ Functions
+------------------------------------------------------------------------------*/
+
+/**
+ @brief Get an integer based log2 of x and return as (log2(x) * 100)
+        No checking of 0 parameter. Passing in 0
+        will return 0.
+
+ @param x The value to get the log2() of.
+
+ @return log2(x) * 100.
+*/
+uint32_t sony_math_log2 (uint32_t x);
+
+/**
+ @brief Get and integer based log10 of x and return as (log10(x) * 100)
+        No checking of 0 parameter. Passing in 0
+        will return 0.
+
+ @param x The value to get the log10() of.
+
+ @return log10(x) * 100.
+*/
+uint32_t sony_math_log10 (uint32_t x);
+
+/**
+ @brief Get an integer based ln (log) of x and return as (ln(x) * 100)
+        No checking of 0 parameter. Passing in 0
+        will return 0.
+
+ @param x The value to get the ln() of.
+
+ @return ln(x) * 100.
+*/
+uint32_t sony_math_log (uint32_t x);
+
+/**
+ @brief minimum macro if not already defined.  Returns the minimum value between two numbers
+
+ @param a First number to compare
+ @param b Second number to compare
+*/
+#ifndef min
+#   define min(a,b)            (((a) < (b)) ? (a) : (b))
+#endif
+
+#endif /* SONY_MATH_H_ */