mlib_signalemphasizeinit_s16s_s16s(3mlib) [sunos man page]
mlib_SignalEmphasizeInit_S16_S16(3MLIB) mediaLib Library Functions mlib_SignalEmphasizeInit_S16_S16(3MLIB)NAME
mlib_SignalEmphasizeInit_S16_S16, mlib_SignalEmphasizeInit_S16S_S16S, mlib_SignalEmphasizeInit_F32_F32, mlib_SignalEmphasizeInit_F32S_F32S
- initialization for signal pre-emphasizing
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_SignalEmphasizeInit_S16_S16(void **filter, mlib_f32 alpha);
mlib_status mlib_SignalEmphasizeInit_S16S_S16S(void **filter, mlib_f32 alpha);
mlib_status mlib_SignalEmphasizeInit_F32_F32(void **filter, mlib_f32 alpha);
mlib_status mlib_SignalEmphasizeInit_F32S_F32S(void **filter, mlib_f32 alpha);
DESCRIPTION
Each of these functions allocates memory for an internal filter structure and converts the filter coefficients into the internal represen-
tation.
PARAMETERS
Each of the functions takes the following arguments:
filter Internal filter structure.
alpha Emphasizing coefficient. 0 < alpha < 1.0
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 TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_SignalEmphasize_S16_S16_Sat(3MLIB), mlib_SignalEmphasizeFree_S16_S16(3MLIB), attributes(5)SunOS 5.10 9 Nov 2004 mlib_SignalEmphasizeInit_S16_S16(3MLIB)
Check Out this Related Man Page
mlib_SignalEmphasize_S16_S16_Sat(3MLIB) mediaLib Library Functions mlib_SignalEmphasize_S16_S16_Sat(3MLIB)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 TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_SignalEmphasizeFree_S16_S16(3MLIB), mlib_SignalEmphasizeInit_S16_S16(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_SignalEmphasize_S16_S16_Sat(3MLIB)