Content-type: text/html Man page of mlib_SignalEmphasize_S16_S16_Sat

mlib_SignalEmphasize_S16_S16_Sat

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

NAME

mlib_SignalEmphasize_S16_S16_Sat, mlib_SignalEmphasize_S16S_S16S_Sat, mlib_SignalEmphasize_F32_F32, mlib_SignalEmphasize_F32S_F32S - signal pre-emphasizing  

SYNOPSIS

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

mlib_status mlib_SignalEmphasize_S16_S16_Sat(mlib_s16 *dst, 
    const mlib_s16 *src, void *filter, mlib_s32 n);

mlib_status mlib_SignalEmphasize_S16S_S16S_Sat(mlib_s16 *dst, 
    const mlib_s16 *src, void *filter, mlib_s32 n);

mlib_status mlib_SignalEmphasize_F32_F32(mlib_f32 *dst, 
    const mlib_f32 *src, void *filter, mlib_s32 n);

mlib_status mlib_SignalEmphasize_F32S_F32S(mlib_f32 *dst, 
    const mlib_f32 *src, void *filter, mlib_s32 n);

 

DESCRIPTION

Each of these functions applies the preemphasizer to one signal packet and updates the filter states.

For monaural signals, the following equation is used:

dst[i] = src[i] - alpha*src[i - 1]

where i = 0, 1, ..., (n - 1); src[-1] = 0.

For stereo signals, the following equation is used:

dst[2*i]     = src[2*i]     - alpha*src[2*(i - 1)]
dst[2*i + 1] = src[2*i + 1] - alpha*src[2*(i - 1) + 1]

where i = 0, 1, ..., (n - 1); src[-2] = src[-1] = 0.  

PARAMETERS

Each of the functions takes the following arguments:

dst

Destination signal array.

src

Source signal array.

filter

Internal filter structure.

n

Number of samples in the source signal array.

 

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_SignalEmphasizeFree_S16_S16(3MLIB), mlib_SignalEmphasizeInit_S16_S16(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:37:56 GMT, October 02, 2010