Secret Rabbit Code 0.1.6 (Default branch)

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01-27-2009

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Secret Rabbit Code 0.1.6 (Default branch)

Secret Rabbit Code is a sample rate converter for audio. It is capable of arbitrary and time varying conversions. It can downsample by a factor of 256 and upsample by the same factor. The ratio of input and output sample rates can be a real number. The conversion ratio can also vary with time for speeding up and slowing down effects. License: GNU General Public License (GPL) Changes:
A bug in the test suite with accounting for rounding errors on x86_64 was fixed.

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mlib_signalupsample_s16_s16

mlib_SignalUpSample_S16_S16(3MLIB)			    mediaLib Library Functions				mlib_SignalUpSample_S16_S16(3MLIB)

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 TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_SignalDownSample_S16_S16(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007					mlib_SignalUpSample_S16_S16(3MLIB)

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