10-20-2016
Hi cmccabe, is this actual code or are you trying to demonstrate a principle?
This seems to be a mix somehow of awk and bash (the "fi" statement) ? The capital E in "Else" is puzzling and so is the opening curly braces without the closing ones and the array reference "high[i]" as well as the variable "high" and what is "[I]if" supposed to mean?
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LEARN ABOUT SUNOS
mlib_signallimit_s16_s16
mlib_SignalLimit(3MLIB) mediaLib Library Functions mlib_SignalLimit(3MLIB)
NAME
mlib_SignalLimit, mlib_SignalLimit_S16_S16, mlib_SignalLimit_S16S_S16S, mlib_SignalLimit_S16, mlib_SignalLimit_S16S, mlib_Signal-
Limit_F32_F32, mlib_SignalLimit_F32S_F32S, mlib_SignalLimit_F32, mlib_SignalLimit_F32S - signal hard limiting
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_SignalLimit_S16_S16(mlib_s16 *dst, const mlib_s16 *src, const mlib_s16 *low, const mlib_s16 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_S16S_S16S(mlib_s16 *dst, const mlib_s16 *src, const mlib_s16 *low, const mlib_s16 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_S16(mlib_s16 *srcdst, const mlib_s16 *low, const mlib_s16 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_S16S(mlib_s16 *srcdst, const mlib_s16 *low, const mlib_s16 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_F32_F32(mlib_f32 *dst, const mlib_f32 *src, const mlib_f32 *low, const mlib_f32 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_F32S_F32S(mlib_f32 *dst, const mlib_f32 *src, const mlib_f32 *low, const mlib_f32 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_F32(mlib_f32 *srcdst, const mlib_f32 *low, const mlib_f32 *high, mlib_s32 n);
mlib_status mlib_SignalLimit_F32S(mlib_f32 *srcdst, const mlib_f32 *low, const mlib_f32 *high, mlib_s32 n);
DESCRIPTION
Each of these functions performs hard limiting.
For monaural signals, the following equation is used:
dst[i] = low[0] if src[i] < low[0]
dst[i] = src[i] if low[0] <= src[i] < high[0]
dst[i] = high[0] if src[i] >= high[0]
where i = 0, 1, ..., (n - 1).
For stereo signals, the following equation is used:
dst[2*i] = low[0] if src[2*i] < low[0]
dst[2*i] = src[2*i] if low[0] <= src[2*i] < high[0]
dst[2*i] = high[0] if src[2*i] >= high[0]
dst[2*i+1] = low[1] if src[2*i+1] < low[1]
dst[2*i+1] = src[2*i+1] if low[1] <= src[2*i+1] < high[1]
dst[2*i+1] = high[1] if src[2*i+1] >= high[1]
where i = 0, 1, ..., (n - 1).
PARAMETERS
Each of the functions takes some of the following arguments:
dst Destination signal array.
src Source signal array.
srcdst Source and destination signal array.
low Lower input limit. In the stereo version, low[0] contains the lower limit for channel 0, and low[1] contains the lower
limit for channel 1.
high Upper input limit. In the stereo version. high[0] contains the upper limit for channel 0, and high[1] contains the upper
limit for channel 1.
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
attributes(5)
SunOS 5.10 10 Nov 2004 mlib_SignalLimit(3MLIB)