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Diffstat (limited to 'Src/h264dec/lcommon/inc/ifunctions.h')
| -rw-r--r-- | Src/h264dec/lcommon/inc/ifunctions.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/Src/h264dec/lcommon/inc/ifunctions.h b/Src/h264dec/lcommon/inc/ifunctions.h new file mode 100644 index 00000000..0d0e86d8 --- /dev/null +++ b/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 + |