mirror of
https://github.com/mstorsjo/fdk-aac.git
synced 2025-03-11 13:30:04 +01:00
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
|
/*************************** Fraunhofer IIS FDK Tools **********************
|
||
|
|
|
||
|
|
(C) Copyright Fraunhofer IIS (2005)
|
||
|
|
All Rights Reserved
|
||
|
|
|
||
|
|
Please be advised that this software and/or program delivery is
|
||
|
|
Confidential Information of Fraunhofer and subject to and covered by the
|
||
|
|
|
||
|
|
Fraunhofer IIS Software Evaluation Agreement
|
||
|
|
between Google Inc. and Fraunhofer
|
||
|
|
effective and in full force since March 1, 2012.
|
||
|
|
|
||
|
|
You may use this software and/or program only under the terms and
|
||
|
|
conditions described in the above mentioned Fraunhofer IIS Software
|
||
|
|
Evaluation Agreement. Any other and/or further use requires a separate agreement.
|
||
|
|
|
||
|
|
|
||
|
|
$Id$
|
||
|
|
Author(s):
|
||
|
|
Description:
|
||
|
|
|
||
|
|
This software and/or program is protected by copyright law and international
|
||
|
|
treaties. Any reproduction or distribution of this software and/or program,
|
||
|
|
or any portion of it, may result in severe civil and criminal penalties, and
|
||
|
|
will be prosecuted to the maximum extent possible under law.
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#ifndef SCRAMBLE_H
|
||
|
|
#define SCRAMBLE_H
|
||
|
|
|
||
|
|
#include "common_fix.h"
|
||
|
|
|
||
|
|
#if defined(__arm__)
|
||
|
|
#include "arm/scramble.h"
|
||
|
|
|
||
|
|
#elif defined(__mips__) && defined(__mips_dsp) /* cppp replaced: elif */
|
||
|
|
#include "mips/scramble.h"
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
|
||
|
|
functionname: scramble
|
||
|
|
description: bitreversal of input data
|
||
|
|
returns:
|
||
|
|
input:
|
||
|
|
output:
|
||
|
|
|
||
|
|
*****************************************************************************/
|
||
|
|
#if !defined(FUNCTION_scramble_sgl)
|
||
|
|
|
||
|
|
inline void scramble_sgl(FIXP_SGL *x, INT n)
|
||
|
|
{
|
||
|
|
INT m,k,j;
|
||
|
|
|
||
|
|
for (m=1,j=0; m<n-1; m++)
|
||
|
|
{
|
||
|
|
{for(k=n>>1; (!((j^=k)&k)); k>>=1);}
|
||
|
|
|
||
|
|
if (j>m)
|
||
|
|
{
|
||
|
|
FIXP_SGL tmp;
|
||
|
|
tmp=x[2*m];
|
||
|
|
x[2*m]=x[2*j];
|
||
|
|
x[2*j]=tmp;
|
||
|
|
|
||
|
|
tmp=x[2*m+1];
|
||
|
|
x[2*m+1]=x[2*j+1];
|
||
|
|
x[2*j+1]=tmp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !defined(FUNCTION_scramble)
|
||
|
|
|
||
|
|
/* default scramble functionality */
|
||
|
|
inline void scramble(FIXP_DBL *x, INT n)
|
||
|
|
{
|
||
|
|
INT m,k,j;
|
||
|
|
FDK_ASSERT(!(((UINT64)x)&(ALIGNMENT_DEFAULT-1)));
|
||
|
|
|
||
|
|
for (m=1,j=0; m<n-1; m++)
|
||
|
|
{
|
||
|
|
{for(k=n>>1; (!((j^=k)&k)); k>>=1);}
|
||
|
|
|
||
|
|
if (j>m)
|
||
|
|
{
|
||
|
|
FIXP_DBL tmp;
|
||
|
|
tmp=x[2*m];
|
||
|
|
x[2*m]=x[2*j];
|
||
|
|
x[2*j]=tmp;
|
||
|
|
|
||
|
|
tmp=x[2*m+1];
|
||
|
|
x[2*m+1]=x[2*j+1];
|
||
|
|
x[2*j+1]=tmp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif /* !defined(FUNCTION_scramble) */
|
||
|
|
|
||
|
|
#endif /* SCRAMBLE_H */
|