mlib_signalemphasizeinit_f32_f32(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)

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)