Initial community commit

Src/h264dec/lcommon/inc/ifunctions.h

@@ -0,0 +1,251 @@
+
+/*!
+ ************************************************************************
+ *  \file
+ *     ifunctions.h
+ *
+ *  \brief
+ *     define some inline functions that are used within the encoder.
+ *
+ *  \author
+ *      Main contributors (see contributors.h for copyright, address and affiliation details)
+ *      - Karsten Sühring                 <suehring@hhi.de>
+ *      - Alexis Tourapis                 <alexismt@ieee.org>
+ *
+ ************************************************************************
+ */
+#ifndef _IFUNCTIONS_H_
+#define _IFUNCTIONS_H_
+
+# if !defined(WIN32) && (__STDC_VERSION__ < 199901L)
+  #define static
+  #define inline
+#endif
+#include <math.h>
+#include <limits.h>
+
+
+static inline short smin(short a, short b)
+{
+  return (short) (((a) < (b)) ? (a) : (b));
+}
+
+static inline short smax(short a, short b)
+{
+  return (short) (((a) > (b)) ? (a) : (b));
+}
+
+static inline int imin(int a, int b)
+{/*
+	int retu;
+	_asm 
+	{
+		mov eax, a
+		mov edx, b
+		cmp edx, eax
+		cmovle eax, edx
+		mov retu, eax
+	}
+	return retu;*/
+  return ((a) < (b)) ? (a) : (b);
+}
+
+static inline int imax(int a, int b)
+{
+  return ((a) > (b)) ? (a) : (b);
+}
+
+static inline double dmin(double a, double b)
+{
+  return ((a) < (b)) ? (a) : (b);
+}
+
+static inline double dmax(double a, double b)
+{
+  return ((a) > (b)) ? (a) : (b);
+}
+
+static inline int64 i64min(int64 a, int64 b)
+{
+  return ((a) < (b)) ? (a) : (b);
+}
+
+static inline int64 i64max(int64 a, int64 b)
+{
+  return ((a) > (b)) ? (a) : (b);
+}
+
+
+static inline short sabs(short x)
+{
+  static const short SHORT_BITS = (sizeof(short) * CHAR_BIT) - 1;
+  short y = (short) (x >> SHORT_BITS);
+  return (short) ((x ^ y) - y);
+}
+
+static inline int iabs(int x)
+{
+  static const int INT_BITS = (sizeof(int) * CHAR_BIT) - 1;
+  int y = x >> INT_BITS;
+  return (x ^ y) - y;
+}
+
+static inline double dabs(double x)
+{
+  return ((x) < 0) ? -(x) : (x);
+}
+
+static inline int64 i64abs(int64 x)
+{
+  static const int64 INT64_BITS = (sizeof(int64) * CHAR_BIT) - 1;
+  int64 y = x >> INT64_BITS;
+  return (x ^ y) - y;
+}
+
+static inline double dabs2(double x)
+{
+  return (x) * (x);
+}
+
+static inline int iabs2(int x) 
+{
+  return (x) * (x);
+}
+
+static inline int64 i64abs2(int64 x)
+{
+  return (x) * (x);
+}
+
+static inline int isign(int x)
+{
+  return ( (x > 0) - (x < 0));
+}
+
+static inline int isignab(int a, int b)
+{
+  return ((b) < 0) ? -iabs(a) : iabs(a);
+}
+
+static inline int rshift_rnd(int x, int a)
+{
+  return (a > 0) ? ((x + (1 << (a-1) )) >> a) : (x << (-a));
+}
+
+static inline int rshift_rnd_pos(int x, int a)
+{
+  return (x + (1 << (a-1) )) >> a;
+}
+
+// flip a before calling
+static inline int rshift_rnd_nonpos(int x, int a)
+{
+  return (x << a);
+}
+
+static inline int rshift_rnd_sign(int x, int a)
+{
+  return (x > 0) ? ( ( x + (1 << (a-1)) ) >> a ) : (-( ( iabs(x) + (1 << (a-1)) ) >> a ));
+}
+
+static inline unsigned int rshift_rnd_us(unsigned int x, unsigned int a)
+{
+  return (a > 0) ? ((x + (1 << (a-1))) >> a) : x;
+}
+
+static inline int rshift_rnd_sf(int x, int a)
+{
+  return ((x + (1 << (a-1) )) >> a);
+}
+
+static inline unsigned int rshift_rnd_us_sf(unsigned int x, unsigned int a)
+{
+  return ((x + (1 << (a-1))) >> a);
+}
+
+static inline int iClip1(int high, int x)
+{
+	if (x < 0)
+		return 0;
+	if (x > high)
+		return high;
+	return x;
+	/* old:
+  x = imax(x, 0);
+  x = imin(x, high);
+
+  return x;*/
+}
+
+static inline int iClip3(int low, int high, int x)
+{
+	if (x < low)
+		return low;
+	if (x > high)
+		return high;
+	return x;
+	/* old:
+  x = imax(x, low);
+  x = imin(x, high);
+
+  return x;*/
+}
+
+static inline short sClip3(short low, short high, short x)
+{
+  x = smax(x, low);
+  x = smin(x, high);
+
+  return x;
+}
+
+static inline double dClip3(double low, double high, double x)
+{
+  x = dmax(x, low);
+  x = dmin(x, high);
+
+  return x;
+}
+
+static inline int weighted_cost(int factor, int bits)
+{
+  return (((factor)*(bits))>>LAMBDA_ACCURACY_BITS);
+}
+
+static inline int RSD(int x)
+{
+ return ((x&2)?(x|1):(x&(~1)));
+}
+
+static inline int power2(int x) 
+{
+  return 1 << (x);
+}
+
+static inline int float2int (float x)
+{
+  return (int)((x < 0) ? (x - 0.5f) : (x + 0.5f));
+}
+
+
+
+#if ZEROSNR
+static inline float psnr(int max_sample_sq, int samples, float sse_distortion ) 
+{
+  return (float) (10.0 * log10(max_sample_sq * (double) ((double) samples / (sse_distortion < 1.0 ? 1.0 : sse_distortion))));
+}
+#else
+static inline float psnr(int max_sample_sq, int samples, float sse_distortion ) 
+{
+  return (float) (sse_distortion == 0.0 ? 0.0 : (10.0 * log10(max_sample_sq * (double) ((double) samples / sse_distortion))));
+}
+#endif
+
+
+# if !defined(WIN32) && (__STDC_VERSION__ < 199901L)
+  #undef static
+  #undef inline
+#endif
+
+#endif
+