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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+  All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
+may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
+individually for the purpose of encoding or decoding bit streams in products that are compliant with
+the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
+these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
+software may already be covered under those patent licenses when it is used for those licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
+are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
+applications information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification, are permitted without
+payment of copyright license fees provided that you satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
+your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation and/or other materials
+provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
+You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived from this library without
+prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
+software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
+and the date of any change. For modified versions of the FDK AAC Codec, the term
+"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
+"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
+ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
+respect to this software.
+
+You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
+by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
+"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
+of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
+including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
+or business interruption, however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of this software, even if
+advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------------------------------------- */
+
+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+   Author(s):   M. Lohwasser, M. Gayer
+   Description: Flexible fixpoint library configuration
+
+******************************************************************************/
+
+#ifndef _COMMON_FIX_H
+#define _COMMON_FIX_H
+
+#include "FDK_archdef.h"
+#include "machine_type.h"
+
+/* ***** Start of former fix.h ****** */
+
+/* Configure fractional or integer arithmetic */
+  #define FIX_FRACT 0 /* Define this to "1" to use fractional arithmetic simulation in class fract instead of integer arithmetic */
+                      /* 1 for debug with extra runtime overflow checking.                                                      */
+
+/* Define bit sizes of integer fixpoint fractional data types */
+#define FRACT_BITS      16 /* single precision */
+#define DFRACT_BITS     32 /* double precision */
+#define ACCU_BITS       40 /* double precision plus overflow */
+
+/* Fixpoint equivalent type fot PCM audio time domain data. */
+#if defined(SAMPLE_BITS)
+#if (SAMPLE_BITS == DFRACT_BITS)
+  #define FIXP_PCM      FIXP_DBL
+  #define FX_PCM2FX_DBL(x) ((FIXP_DBL)(x))
+  #define FX_DBL2FX_PCM(x) ((INT_PCM)(x))
+#elif (SAMPLE_BITS == FRACT_BITS)
+  #define FIXP_PCM      FIXP_SGL
+  #define FX_PCM2FX_DBL(x) FX_SGL2FX_DBL((FIXP_SGL)(x))
+  #define FX_DBL2FX_PCM(x) FX_DBL2FX_SGL(x)
+#else
+  #error SAMPLE_BITS different from FRACT_BITS or DFRACT_BITS not implemented!
+#endif
+#endif
+
+/* ****** End of former fix.h ****** */
+
+#define SGL_MASK            ((1UL<<FRACT_BITS)-1)   /* 16bit: (2^16)-1 = 0xFFFF */
+
+#define MAX_SHIFT_SGL (FRACT_BITS-1)   /* maximum possible shift for FIXP_SGL values */
+#define MAX_SHIFT_DBL (DFRACT_BITS-1)  /* maximum possible shift for FIXP_DBL values */
+
+/* Scale factor from/to float/fixpoint values. DO NOT USE THESE VALUES AS SATURATION LIMITS !! */
+#define FRACT_FIX_SCALE     ((INT64(1)<<(FRACT_BITS-1)))
+#define DFRACT_FIX_SCALE    ((INT64(1)<<(DFRACT_BITS-1)))
+
+/* Max and Min values for saturation purposes. DO NOT USE THESE VALUES AS SCALE VALUES !! */
+#define  MAXVAL_SGL     ((signed)0x00007FFF)    /* this has to be synchronized to FRACT_BITS */
+#define  MINVAL_SGL     ((signed)0xFFFF8000)    /* this has to be synchronized to FRACT_BITS */
+#define  MAXVAL_DBL     ((signed)0x7FFFFFFF)    /* this has to be synchronized to DFRACT_BITS */
+#define  MINVAL_DBL     ((signed)0x80000000)    /* this has to be synchronized to DFRACT_BITS */
+
+
+#define FX_DBL2FXCONST_SGL(val) ( ( ((((val) >> (DFRACT_BITS-FRACT_BITS-1)) + 1) > (((LONG)1<<FRACT_BITS)-1)) && ((LONG)(val) > 0) ) ? \
+   (FIXP_SGL)(SHORT)(((LONG)1<<(FRACT_BITS-1))-1):(FIXP_SGL)(SHORT)((((val) >> (DFRACT_BITS-FRACT_BITS-1)) + 1) >> 1) )
+
+
+
+#define shouldBeUnion union     /* unions are possible */
+
+    typedef SHORT       FIXP_SGL;
+    typedef LONG        FIXP_DBL;
+
+/* macros for compile-time conversion of constant float values to fixedpoint */
+#define FL2FXCONST_SPC FL2FXCONST_DBL
+
+#define MINVAL_DBL_CONST MINVAL_DBL
+#define MINVAL_SGL_CONST MINVAL_SGL
+
+#define FL2FXCONST_SGL(val)                                                                                                     \
+(FIXP_SGL)( ( (val) >= 0) ?                                                                                                               \
+((( (double)(val) * (FRACT_FIX_SCALE) + 0.5 ) >= (double)(MAXVAL_SGL) ) ? (SHORT)(MAXVAL_SGL) : (SHORT)( (double)(val) * (double)(FRACT_FIX_SCALE) + 0.5)) :   \
+((( (double)(val) * (FRACT_FIX_SCALE) - 0.5) <=  (double)(MINVAL_SGL_CONST) ) ? (SHORT)(MINVAL_SGL_CONST) : (SHORT)( (double)(val) * (double)(FRACT_FIX_SCALE) - 0.5)) )
+
+#define FL2FXCONST_DBL(val)                                                                                                     \
+(FIXP_DBL)( ( (val) >= 0) ?                                                                                                               \
+((( (double)(val) * (DFRACT_FIX_SCALE) + 0.5 ) >= (double)(MAXVAL_DBL) ) ? (LONG)(MAXVAL_DBL) : (LONG)( (double)(val) * (double)(DFRACT_FIX_SCALE) + 0.5)) : \
+((( (double)(val) * (DFRACT_FIX_SCALE) - 0.5) <=  (double)(MINVAL_DBL_CONST) ) ? (LONG)(MINVAL_DBL_CONST) : (LONG)( (double)(val) * (double)(DFRACT_FIX_SCALE) - 0.5)) )
+
+/* macros for runtime conversion of float values to integer fixedpoint. NO OVERFLOW CHECK!!! */
+#define FL2FX_SPC FL2FX_DBL
+#define FL2FX_SGL(val) ( (val)>0.0f ? (SHORT)( (val)*(float)(FRACT_FIX_SCALE)+0.5f ) : (SHORT)( (val)*(float)(FRACT_FIX_SCALE)-0.5f ) )
+#define FL2FX_DBL(val) ( (val)>0.0f ? (LONG)( (val)*(float)(DFRACT_FIX_SCALE)+0.5f ) : (LONG)( (val)*(float)(DFRACT_FIX_SCALE)-0.5f ) )
+
+/* macros for runtime conversion of fixedpoint values to other fixedpoint. NO ROUNDING!!! */
+#define FX_ACC2FX_SGL(val) ((FIXP_SGL)((val)>>(ACCU_BITS-FRACT_BITS)))
+#define FX_ACC2FX_DBL(val) ((FIXP_DBL)((val)>>(ACCU_BITS-DFRACT_BITS)))
+#define FX_SGL2FX_ACC(val) ((FIXP_ACC)((LONG)(val)<<(ACCU_BITS-FRACT_BITS)))
+#define FX_SGL2FX_DBL(val) ((FIXP_DBL)((LONG)(val)<<(DFRACT_BITS-FRACT_BITS)))
+#define FX_DBL2FX_SGL(val) ((FIXP_SGL)((val)>>(DFRACT_BITS-FRACT_BITS)))
+
+/* ############################################################# */
+
+/* macros for runtime conversion of integer fixedpoint values to float. */
+/* This is just for temporary use and should not be required in a final version! */
+
+/* #define FX_DBL2FL(val)  ((float)(pow(2.,-31.)*(float)val)) */  /* version #1 */
+#define FX_DBL2FL(val)  ((float)((double)(val)/(double)DFRACT_FIX_SCALE))   /* version #2 - identical to class dfract cast from dfract to float */
+
+/* ############################################################# */
+#include "fixmul.h"
+
+FDK_INLINE LONG fMult(SHORT a, SHORT b)         { return fixmul_SS(a, b); }
+FDK_INLINE LONG fMult(SHORT a, LONG b)          { return fixmul_SD(a, b); }
+FDK_INLINE LONG fMult(LONG a, SHORT b)          { return fixmul_DS(a, b); }
+FDK_INLINE LONG fMult(LONG a, LONG b)           { return fixmul_DD(a, b); }
+FDK_INLINE LONG fPow2(LONG a)                   { return fixpow2_D(a);    }
+FDK_INLINE LONG fPow2(SHORT a)                  { return fixpow2_S(a);    }
+
+FDK_INLINE INT  fMultI(LONG a, SHORT b)         { return ( (INT)(((1<<(FRACT_BITS-2)) +
+                                                          fixmuldiv2_DD(a,((INT)b<<FRACT_BITS)))>>(FRACT_BITS-1)) ); }
+
+FDK_INLINE INT  fMultIfloor(LONG a, INT b)      { return ( (INT)((1 +
+                                                          fixmuldiv2_DD(a,(b<<FRACT_BITS))) >> (FRACT_BITS-1)) ); }
+
+FDK_INLINE INT  fMultIceil(LONG a, INT b)       { return ( (INT)(((INT)0x7fff +
+                                                          fixmuldiv2_DD(a,(b<<FRACT_BITS))) >> (FRACT_BITS-1)) ); }
+
+FDK_INLINE LONG fMultDiv2(SHORT a, SHORT b)     { return fixmuldiv2_SS(a, b); }
+FDK_INLINE LONG fMultDiv2(SHORT a, LONG b)      { return fixmuldiv2_SD(a, b); }
+FDK_INLINE LONG fMultDiv2(LONG a, SHORT b)      { return fixmuldiv2_DS(a, b); }
+FDK_INLINE LONG fMultDiv2(LONG a, LONG b)       { return fixmuldiv2_DD(a, b); }
+FDK_INLINE LONG fPow2Div2(LONG a)               { return fixpow2div2_D(a);    }
+FDK_INLINE LONG fPow2Div2(SHORT a)              { return fixpow2div2_S(a);    }
+
+FDK_INLINE LONG fMultDiv2BitExact(LONG a, LONG b)   { return fixmuldiv2BitExact_DD(a, b); }
+FDK_INLINE LONG fMultDiv2BitExact(SHORT a, LONG  b) { return fixmuldiv2BitExact_SD(a, b); }
+FDK_INLINE LONG fMultDiv2BitExact(LONG  a, SHORT b) { return fixmuldiv2BitExact_DS(a, b); }
+FDK_INLINE LONG fMultBitExact(LONG a, LONG b)       { return fixmulBitExact_DD(a, b); }
+FDK_INLINE LONG fMultBitExact(SHORT a, LONG  b)     { return fixmulBitExact_SD(a, b); }
+FDK_INLINE LONG fMultBitExact(LONG  a, SHORT b)     { return fixmulBitExact_DS(a, b); }
+
+/* ******************************************************************************** */
+#include "abs.h"
+
+FDK_INLINE FIXP_DBL fAbs(FIXP_DBL x)
+                { return fixabs_D(x); }
+FDK_INLINE FIXP_SGL fAbs(FIXP_SGL x)
+                { return fixabs_S(x); }
+
+
+/* workaround for TI C6x compiler but not for TI ARM9E compiler */
+#if (!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__)
+FDK_INLINE INT  fAbs(INT x)
+                { return fixabs_I(x); }
+#endif
+
+/* ******************************************************************************** */
+
+#include "clz.h"
+
+FDK_INLINE INT fNormz(FIXP_DBL x)
+               { return fixnormz_D(x); }
+FDK_INLINE INT fNormz(FIXP_SGL x)
+               { return fixnormz_S(x); }
+FDK_INLINE INT fNorm(FIXP_DBL x)
+               { return fixnorm_D(x); }
+FDK_INLINE INT fNorm(FIXP_SGL x)
+               { return fixnorm_S(x); }
+
+
+/* ******************************************************************************** */
+/* ******************************************************************************** */
+/* ******************************************************************************** */
+
+#include "clz.h"
+#define fixp_abs(x) fAbs(x)
+#define fixMin(a,b) fMin(a,b)
+#define fixMax(a,b) fMax(a,b)
+#define CntLeadingZeros(x)  fixnormz_D(x)
+#define CountLeadingBits(x) fixnorm_D(x)
+
+#include "fixmadd.h"
+
+/* y = (x+0.5*a*b) */
+FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmadddiv2_DD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmadddiv2_SD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmadddiv2_DS(x, a, b); }
+FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b)
+                { return fixmadddiv2_SS(x, a, b); }
+
+FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_DBL a)
+                { return fixpadddiv2_D(x, a); }
+FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_SGL a)
+                { return fixpadddiv2_S(x, a); }
+
+
+/* y = 2*(x+0.5*a*b) = (2x+a*b) */
+FDK_INLINE FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmadd_DD(x, a, b); }
+inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmadd_SD(x, a, b); }
+inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmadd_DS(x, a, b); }
+inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b)
+                { return fixmadd_SS(x, a, b); }
+
+inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_DBL a)
+                { return fixpadd_D(x, a); }
+inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_SGL a)
+                { return fixpadd_S(x, a); }
+
+
+/* y = (x-0.5*a*b) */
+inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmsubdiv2_DD(x, a, b); }
+inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmsubdiv2_SD(x, a, b); }
+inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmsubdiv2_DS(x, a, b); }
+inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b)
+                { return fixmsubdiv2_SS(x, a, b); }
+
+/* y = 2*(x-0.5*a*b) = (2*x-a*b) */
+FDK_INLINE FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmsub_DD(x, a, b); }
+inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmsub_SD(x, a, b); }
+inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmsub_DS(x, a, b); }
+inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b)
+                { return fixmsub_SS(x, a, b); }
+
+FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmadddiv2BitExact_DD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmadddiv2BitExact_SD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmadddiv2BitExact_DS(x, a, b); }
+FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b)
+                { return fixmsubdiv2BitExact_DD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b)
+                { return fixmsubdiv2BitExact_SD(x, a, b); }
+FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b)
+                { return fixmsubdiv2BitExact_DS(x, a, b); }
+
+#include "fixminmax.h"
+
+FDK_INLINE FIXP_DBL fMin(FIXP_DBL a, FIXP_DBL b)
+                { return fixmin_D(a,b); }
+FDK_INLINE FIXP_DBL fMax(FIXP_DBL a, FIXP_DBL b)
+                { return fixmax_D(a,b); }
+
+FDK_INLINE FIXP_SGL fMin(FIXP_SGL a, FIXP_SGL b)
+                { return fixmin_S(a,b); }
+FDK_INLINE FIXP_SGL fMax(FIXP_SGL a, FIXP_SGL b)
+                { return fixmax_S(a,b); }
+
+
+/* workaround for TI C6x compiler but not for TI ARM9E */
+#if ((!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__)) || (FIX_FRACT == 1)
+FDK_INLINE INT fMax(INT a, INT b)
+                { return fixmax_I(a,b); }
+FDK_INLINE INT fMin(INT a, INT b)
+                { return fixmin_I(a,b); }
+#endif
+
+inline UINT fMax(UINT a, UINT b)
+                { return fixmax_UI(a,b); }
+inline UINT fMin(UINT a, UINT b)
+                { return fixmin_UI(a,b); }
+
+/* Complex data types */
+typedef shouldBeUnion {
+  /* vector representation for arithmetic */
+  struct {
+    FIXP_SGL re;
+    FIXP_SGL im;
+  } v;
+  /* word representation for memory move */
+  LONG w;
+} FIXP_SPK;
+
+typedef shouldBeUnion {
+  /* vector representation for arithmetic */
+  struct {
+    FIXP_DBL re;
+    FIXP_DBL im;
+  } v;
+  /* word representation for memory move */
+  INT64 w;
+} FIXP_DPK;
+
+#include "fixmul.h"
+#include "fixmadd.h"
+#include "cplx_mul.h"
+#include "scale.h"
+#include "fixpoint_math.h"
+
+#endif