Remove FDK-AAC

1 files changed, 0 insertions, 355 deletions

diff --git a/libSBRdec/src/transcendent.h b/libSBRdec/src/transcendent.h
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--- a/libSBRdec/src/transcendent.h
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-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright  1995 - 2013 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
------------------------------------------------------------------------------------------------------------ */
-
-/*!
-  \file
-  \brief  FDK Fixed Point Arithmetic Library Interface  
-*/
-
-#ifndef __TRANSCENDENT_H
-#define __TRANSCENDENT_H
-
-#include "sbrdecoder.h"
-#include "sbr_rom.h"
-
-/************************************************************************/
-/*!
-  \brief   Get number of octaves between frequencies a and b
-
-  The Result is scaled with 1/8.
-  The valid range for a and b is 1 to LOG_DUALIS_TABLE_SIZE.
-
-  \return   ld(a/b) / 8
-*/
-/************************************************************************/
-static inline FIXP_SGL FDK_getNumOctavesDiv8(INT a, /*!< lower band */
-                                             INT b) /*!< upper band */
-{
-  return ( (SHORT)((LONG)(CalcLdInt(b) - CalcLdInt(a))>>(FRACT_BITS-3)) );
-}
-
-
-/************************************************************************/
-/*!
-  \brief   Add two values given by mantissa and exponent.
-
-  Mantissas are in fract format with values between 0 and 1. <br>
-  The base for exponents is 2.  Example:  \f$  a = a\_m * 2^{a\_e}  \f$<br>
-*/
-/************************************************************************/
-inline void FDK_add_MantExp(FIXP_SGL a_m, /*!< Mantissa of 1st operand a */
-                     SCHAR     a_e,       /*!< Exponent of 1st operand a */
-                     FIXP_SGL  b_m,       /*!< Mantissa of 2nd operand b */
-                     SCHAR     b_e,       /*!< Exponent of 2nd operand b */
-                     FIXP_SGL *ptrSum_m,  /*!< Mantissa of result */
-                     SCHAR    *ptrSum_e)  /*!< Exponent of result */
-{
-  FIXP_DBL accu;
-  int   shift;
-  int   shiftAbs;
-
-  FIXP_DBL shiftedMantissa;
-  FIXP_DBL otherMantissa;
-
-  /* Equalize exponents of the summands.
-     For the smaller summand, the exponent is adapted and
-     for compensation, the mantissa is shifted right. */
-
-  shift = (int)(a_e - b_e);
-
-  shiftAbs = (shift>0)? shift : -shift;
-  shiftAbs = (shiftAbs < DFRACT_BITS-1)? shiftAbs : DFRACT_BITS-1;
-  shiftedMantissa = (shift>0)? (FX_SGL2FX_DBL(b_m) >> shiftAbs) : (FX_SGL2FX_DBL(a_m) >> shiftAbs);
-  otherMantissa = (shift>0)? FX_SGL2FX_DBL(a_m) : FX_SGL2FX_DBL(b_m);
-  *ptrSum_e = (shift>0)? a_e : b_e;
-
-  accu = (shiftedMantissa >> 1) + (otherMantissa >> 1);
-  /* shift by 1 bit to avoid overflow */
-
-  if ( (accu >= (FL2FXCONST_DBL(0.5f) - (FIXP_DBL)1)) || (accu <= FL2FXCONST_DBL(-0.5f)) )
-    *ptrSum_e += 1;
-  else
-    accu = (shiftedMantissa + otherMantissa);
-
-  *ptrSum_m = FX_DBL2FX_SGL(accu);
-
-}
-
-inline void FDK_add_MantExp(FIXP_DBL a,   /*!< Mantissa of 1st operand a */
-                     SCHAR     a_e,       /*!< Exponent of 1st operand a */
-                     FIXP_DBL  b,         /*!< Mantissa of 2nd operand b */
-                     SCHAR     b_e,       /*!< Exponent of 2nd operand b */
-                     FIXP_DBL *ptrSum,    /*!< Mantissa of result */
-                     SCHAR    *ptrSum_e)  /*!< Exponent of result */
-{
-  FIXP_DBL accu;
-  int   shift;
-  int   shiftAbs;
-
-  FIXP_DBL shiftedMantissa;
-  FIXP_DBL otherMantissa;
-
-  /* Equalize exponents of the summands.
-     For the smaller summand, the exponent is adapted and
-     for compensation, the mantissa is shifted right. */
-
-  shift = (int)(a_e - b_e);
-
-  shiftAbs = (shift>0)? shift : -shift;
-  shiftAbs = (shiftAbs < DFRACT_BITS-1)? shiftAbs : DFRACT_BITS-1;
-  shiftedMantissa = (shift>0)? (b >> shiftAbs) : (a >> shiftAbs);
-  otherMantissa = (shift>0)? a : b;
-  *ptrSum_e = (shift>0)? a_e : b_e;
-
-  accu = (shiftedMantissa >> 1) + (otherMantissa >> 1);
-  /* shift by 1 bit to avoid overflow */
-
-  if ( (accu >= (FL2FXCONST_DBL(0.5f) - (FIXP_DBL)1)) || (accu <= FL2FXCONST_DBL(-0.5f)) )
-    *ptrSum_e += 1;
-  else
-    accu = (shiftedMantissa + otherMantissa);
-
-  *ptrSum = accu;
-
-}
-
-/************************************************************************/
-/*!
-  \brief   Divide two values given by mantissa and exponent.
-
-  Mantissas are in fract format with values between 0 and 1. <br>
-  The base for exponents is 2.  Example:  \f$  a = a\_m * 2^{a\_e}  \f$<br>
-
-  For performance reasons, the division is based on a table lookup
-  which limits accuracy.
-*/
-/************************************************************************/
-static inline void FDK_divide_MantExp(FIXP_SGL a_m,           /*!< Mantissa of dividend a */
-                                      SCHAR     a_e,          /*!< Exponent of dividend a */
-                                      FIXP_SGL  b_m,          /*!< Mantissa of divisor b */
-                                      SCHAR     b_e,          /*!< Exponent of divisor b */
-                                      FIXP_SGL *ptrResult_m,  /*!< Mantissa of quotient a/b */
-                                      SCHAR    *ptrResult_e)  /*!< Exponent of quotient a/b */
-
-{
-  int preShift, postShift, index, shift;
-  FIXP_DBL ratio_m;
-  FIXP_SGL  bInv_m = FL2FXCONST_SGL(0.0f);
-
-  preShift = CntLeadingZeros(FX_SGL2FX_DBL(b_m));
-
-  /*
-    Shift b into the range from 0..INV_TABLE_SIZE-1,
-
-    E.g. 10 bits must be skipped for INV_TABLE_BITS 8:
-    - leave 8 bits as index for table
-    - skip sign bit,
-    - skip first bit of mantissa, because this is always the same (>0.5)
-
-    We are dealing with energies, so we need not care
-    about negative numbers
-  */
-
-  /*
-    The first interval has half width so the lowest bit of the index is
-    needed for a doubled resolution.
-  */
-  shift = (FRACT_BITS - 2 - INV_TABLE_BITS - preShift);
-
-  index = (shift<0)? (LONG)b_m << (-shift) : (LONG)b_m >> shift;
-
-
-  /* The index has INV_TABLE_BITS +1 valid bits here. Clear the other bits. */
-  index &= (1 << (INV_TABLE_BITS+1)) - 1;
-
-    /* Remove offset of half an interval */
-  index--;
-
-    /* Now the lowest bit is shifted out */
-  index = index >> 1;
-
-    /* Fetch inversed mantissa from table: */
-  bInv_m = (index<0)? bInv_m : FDK_sbrDecoder_invTable[index];
-
-    /* Multiply a with the inverse of b: */
-  ratio_m = (index<0)? FX_SGL2FX_DBL(a_m >> 1) : fMultDiv2(bInv_m,a_m);
-
-  postShift = CntLeadingZeros(ratio_m)-1;
-
-  *ptrResult_m = FX_DBL2FX_SGL(ratio_m << postShift);
-  *ptrResult_e = a_e - b_e + 1 + preShift - postShift;
-}
-
-static inline void FDK_divide_MantExp(FIXP_DBL a_m,           /*!< Mantissa of dividend a */
-                                      SCHAR     a_e,          /*!< Exponent of dividend a */
-                                      FIXP_DBL  b_m,          /*!< Mantissa of divisor b */
-                                      SCHAR     b_e,          /*!< Exponent of divisor b */
-                                      FIXP_DBL *ptrResult_m,  /*!< Mantissa of quotient a/b */
-                                      SCHAR    *ptrResult_e)  /*!< Exponent of quotient a/b */
-
-{
-  int preShift, postShift, index, shift;
-  FIXP_DBL ratio_m;
-  FIXP_SGL  bInv_m = FL2FXCONST_SGL(0.0f);
-
-  preShift = CntLeadingZeros(b_m);
-
-  /*
-    Shift b into the range from 0..INV_TABLE_SIZE-1,
-
-    E.g. 10 bits must be skipped for INV_TABLE_BITS 8:
-    - leave 8 bits as index for table
-    - skip sign bit,
-    - skip first bit of mantissa, because this is always the same (>0.5)
-
-    We are dealing with energies, so we need not care
-    about negative numbers
-  */
-
-  /*
-    The first interval has half width so the lowest bit of the index is
-    needed for a doubled resolution.
-  */
-  shift = (DFRACT_BITS - 2 - INV_TABLE_BITS - preShift);
-
-  index = (shift<0)? (LONG)b_m << (-shift) : (LONG)b_m >> shift;
-
-
-  /* The index has INV_TABLE_BITS +1 valid bits here. Clear the other bits. */
-  index &= (1 << (INV_TABLE_BITS+1)) - 1;
-
-    /* Remove offset of half an interval */
-  index--;
-
-    /* Now the lowest bit is shifted out */
-  index = index >> 1;
-
-    /* Fetch inversed mantissa from table: */
-  bInv_m = (index<0)? bInv_m : FDK_sbrDecoder_invTable[index];
-
-    /* Multiply a with the inverse of b: */
-  ratio_m = (index<0)? (a_m >> 1) : fMultDiv2(bInv_m,a_m);
-
-  postShift = CntLeadingZeros(ratio_m)-1;
-
-  *ptrResult_m = ratio_m << postShift;
-  *ptrResult_e = a_e - b_e + 1 + preShift - postShift;
-}
-
-/*!
-  \brief   Calculate the squareroot of a number given by mantissa and exponent
-
-  Mantissa is in fract format with values between 0 and 1. <br>
-  The base for the exponent is 2.  Example:  \f$  a = a\_m * 2^{a\_e}  \f$<br>
-  The operand is addressed via pointers and will be overwritten with the result.
-
-  For performance reasons, the square root is based on a table lookup
-  which limits accuracy.
-*/
-static inline void FDK_sqrt_MantExp(FIXP_DBL *mantissa,    /*!< Pointer to mantissa */
-                                    SCHAR    *exponent,
-                                    const SCHAR *destScale)
-{
-  FIXP_DBL input_m = *mantissa;
-  int   input_e = (int) *exponent;
-  FIXP_DBL result = FL2FXCONST_DBL(0.0f);
-  int    result_e = -FRACT_BITS;
-
-  /* Call lookup square root, which does internally normalization. */
-  result   = sqrtFixp_lookup(input_m, &input_e);
-  result_e = input_e;
-
-  /* Write result */
-  if (exponent==destScale) {
-    *mantissa = result;
-    *exponent = result_e;
-  } else {
-    int shift = result_e - *destScale;
-    *mantissa = (shift>=0) ? result << (INT)fixMin(DFRACT_BITS-1,shift)
-                           : result >> (INT)fixMin(DFRACT_BITS-1,-shift);
-    *exponent = *destScale;
-  }
-}
-
-
-#endif