Content-type: text/html Man page of mlib_VectorDotProd_U8_Sat

mlib_VectorDotProd_U8_Sat

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents
 

NAME

mlib_VectorDotProd_U8_Sat, mlib_VectorDotProd_U8C_Sat, mlib_VectorDotProd_S8_Sat, mlib_VectorDotProd_S8C_Sat, mlib_VectorDotProd_S16_Sat, mlib_VectorDotProd_S16C_Sat, mlib_VectorDotProd_S32_Sat, mlib_VectorDotProd_S32C_Sat - vector dot product (inner product)  

SYNOPSIS

cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_VectorDotProd_U8_Sat(mlib_d64 *z, 
    const mlib_u8 *x, const mlib_u8 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_U8C_Sat(mlib_d64 *z, 
    const mlib_u8 *x, const mlib_u8 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S8_Sat(mlib_d64 *z,
    const mlib_s8 *x, const mlib_s8 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S8C_Sat(mlib_d64 *z,
    const mlib_s8 *x, const mlib_s8 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S16_Sat(mlib_d64 *z,
    const mlib_s16 *x,const mlib_s16 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S16C_Sat(mlib_d64 *z,
    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S32_Sat(mlib_d64 *z,
    const mlib_s32 *x, const mlib_s32 *y, mlib_s32 n);

mlib_status mlib_VectorDotProd_S32C_Sat(mlib_d64 *z,
    const mlib_s32 *x, const mlib_s32 *y, mlib_s32 n);

 

DESCRIPTION

Each of these functions computes the dot product of two vectors, defined by the following equation:

Z = X . Y*

where Y* is the conjugate of the Y vector.

For real data, the following equation is used:

       n-1
z[0] = SUM (x[i]*y[i])
      i=0

For complex data, the following equation is used:

       n-1
z[0] = SUM (x[2*i]*y[2*i] + x[2*i + 1]*y[2*i + 1])
      i=0

      n-1
z[1] = SUM (x[2*i + 1]*y[2*i] - x[2*i]*y[2*i + 1])
      i=0

 

PARAMETERS

Each of the functions takes the following arguments:

z

Pointer to the dot product of the two vectors.

x

Pointer to the first element of the first source vector.

y

Pointer to the first element of the second source vector.

n

Number of elements in the vectors.

 

RETURN VALUES

Each of the functions returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:11 GMT, October 02, 2010