Content-type: text/html Man page of mlib_VectorMulMShift_S16_S16_Mod

mlib_VectorMulMShift_S16_S16_Mod

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

NAME

mlib_VectorMulMShift_S16_S16_Mod, mlib_VectorMulMShift_S16_S16_Sat, mlib_VectorMulMShift_S16C_S16C_Mod, mlib_VectorMulMShift_S16C_S16C_Sat - multiplication of vector by matrix with shifting  

SYNOPSIS

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

mlib_status mlib_VectorMulMShift_S16_S16_Mod(mlib_s16 *z, 
    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, 
    mlib_s32 n, mlib_s32 shift);

mlib_status mlib_VectorMulMShift_S16_S16_Sat(mlib_s16 *z, 
    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, 
    mlib_s32 n, mlib_s32 shift);

mlib_status mlib_VectorMulMShift_S16C_S16C_Mod(mlib_s16 *z, 
    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, 
    mlib_s32 n, mlib_s32 shift);

mlib_status mlib_VectorMulMShift_S16C_S16C_Sat(mlib_s16 *z, 
    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m, 
    mlib_s32 n, mlib_s32 shift);

 

DESCRIPTION

Each of these functions multiplies a vector by a matrix and shifts the results.

For real data, the following equation is used:

         m-1
z[i] = { SUM (x[j] * y[j*m + i]) } * 2**(-shift)
        j=0

where i = 0, 1, ..., (n - 1).

For complex data, the following equation is used:

               m-1
z[2*i ]    = { SUM (xR*yR - xI*yI) } * 2**(-shift)
              j=0

              m-1
z[2*i + 1] = { SUM (xR*yI + xI*yR) } * 2**(-shift)
              j=0

where i = 0, 1, ..., (n - 1), and

xR = x[2*j]
xI = x[2*j + 1]
yR = y[2*(j*m + i)]
yI = y[2*(j*m + i) + 1]

 

PARAMETERS

Each of the functions takes the following arguments:

z

Pointer to the first element of the destination vector.

x

Pointer to the first element of the source vector.

y

Pointer to the first element of the source matrix.

m

Number of rows in the matrix, and number of elements in the source vector.

n

Number of columns in the matrix, and number of elements in the destination vector.

shift

Right shifting factor.

 

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

mlib_VectorMulM_U8_U8_Mod(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:03 GMT, October 02, 2010