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mlib_SignalUpSample_S16_S16

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
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NAME

mlib_SignalUpSample_S16_S16, mlib_SignalUpSample_S16S_S16S, mlib_SignalUpSample_F32_F32, mlib_SignalUpSample_F32S_F32S - signal upsampling  

SYNOPSIS

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

mlib_status mlib_SignalUpSample_S16_S16(mlib_s16 *dst, 
    const mlib_s16 *src, mlib_s32 factor, mlib_s32 phase, 
    mlib_s32 n);

mlib_status mlib_SignalUpSample_S16S_S16S(mlib_s16 *dst, 
    const mlib_s16 *src, mlib_s32 factor, mlib_s32 phase, 
    mlib_s32 n);

mlib_status mlib_SignalUpSample_F32_F32(mlib_f32 *dst, 
    const mlib_f32 *src, mlib_s32 factor, mlib_s32 phase, 
    mlib_s32 n);

mlib_status mlib_SignalUpSample_F32S_F32S(mlib_f32 *dst, 
    const mlib_f32 *src, mlib_s32 factor, mlib_s32 phase, 
    mlib_s32 n);

 

DESCRIPTION

Each of these functions performs upsampling.

For monaural signals, the following equation is used:

dst[i] = src[k]  if i == k*factor + phase
dst[i] = 0       if i != k*factor + phase

where k = 0, 1, ..., (n - 1); i = 0, 1, ..., (n*factor - 1).

For stereo signals, the following equation is used:

dst[2*i]     = src[2*k]      if i == k*factor + phase
dst[2*i]     = 0             if i != k*factor + phase

dst[2*i + 1] = src[2*k + 1]  if i == k*factor + phase
dst[2*i + 1] = 0             if i != k*factor + phase

where k = 0, 1, ..., (n - 1); i = 0, 1, ..., (n*factor - 1).  

PARAMETERS

Each of the functions takes the following arguments:

dst

Output signal array.

src

Input signal array.

factor

Factor by which to upsample. factor ≥ 1.

phase

Parameter that determines relative position of an input value, within the output signal. 0 ≤ phase < factor.

n

Number of samples in the input 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_SignalDownSample_S16_S16(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:17 GMT, October 02, 2010