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Diffstat (limited to 'libSBRenc/src/sbr_misc.cpp')
| -rw-r--r-- | libSBRenc/src/sbr_misc.cpp | 213 |
1 files changed, 103 insertions, 110 deletions
diff --git a/libSBRenc/src/sbr_misc.cpp b/libSBRenc/src/sbr_misc.cpp index c673b81..83d7e36 100644 --- a/libSBRenc/src/sbr_misc.cpp +++ b/libSBRenc/src/sbr_misc.cpp @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- 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. +© Copyright 1995 - 2018 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. +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: +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 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 +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. +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. +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." +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. +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. +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. +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 @@ -79,17 +90,23 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** SBR encoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ /*! \file - \brief Sbr miscellaneous helper functions + \brief Sbr miscellaneous helper functions $Revision: 36750 $ */ #include "sbr_misc.h" - -void FDKsbrEnc_Shellsort_fract (FIXP_DBL *in, INT n) -{ +void FDKsbrEnc_Shellsort_fract(FIXP_DBL *in, INT n) { FIXP_DBL v; INT i, j; INT inc = 1; @@ -101,24 +118,20 @@ void FDKsbrEnc_Shellsort_fract (FIXP_DBL *in, INT n) do { inc = inc / 3; for (i = inc + 1; i <= n; i++) { - v = in[i-1]; + v = in[i - 1]; j = i; - while (in[j-inc-1] > v) { - in[j-1] = in[j-inc-1]; + while (in[j - inc - 1] > v) { + in[j - 1] = in[j - inc - 1]; j -= inc; - if (j <= inc) - break; + if (j <= inc) break; } - in[j-1] = v; + in[j - 1] = v; } } while (inc > 1); - } /* Sorting routine */ -void FDKsbrEnc_Shellsort_int (INT *in, INT n) -{ - +void FDKsbrEnc_Shellsort_int(INT *in, INT n) { INT i, j, v; INT inc = 1; @@ -129,22 +142,18 @@ void FDKsbrEnc_Shellsort_int (INT *in, INT n) do { inc = inc / 3; for (i = inc + 1; i <= n; i++) { - v = in[i-1]; + v = in[i - 1]; j = i; - while (in[j-inc-1] > v) { - in[j-1] = in[j-inc-1]; + while (in[j - inc - 1] > v) { + in[j - 1] = in[j - inc - 1]; j -= inc; - if (j <= inc) - break; + if (j <= inc) break; } - in[j-1] = v; + in[j - 1] = v; } } while (inc > 1); - } - - /******************************************************************************* Functionname: FDKsbrEnc_AddVecLeft ******************************************************************************* @@ -156,16 +165,13 @@ void FDKsbrEnc_Shellsort_int (INT *in, INT n) Return: none *******************************************************************************/ -void -FDKsbrEnc_AddVecLeft (INT *dst, INT *length_dst, INT *src, INT length_src) -{ +void FDKsbrEnc_AddVecLeft(INT *dst, INT *length_dst, INT *src, INT length_src) { INT i; for (i = length_src - 1; i >= 0; i--) - FDKsbrEnc_AddLeft (dst, length_dst, src[i]); + FDKsbrEnc_AddLeft(dst, length_dst, src[i]); } - /******************************************************************************* Functionname: FDKsbrEnc_AddLeft ******************************************************************************* @@ -177,18 +183,14 @@ FDKsbrEnc_AddVecLeft (INT *dst, INT *length_dst, INT *src, INT length_src) Return: none *******************************************************************************/ -void -FDKsbrEnc_AddLeft (INT *vector, INT *length_vector, INT value) -{ +void FDKsbrEnc_AddLeft(INT *vector, INT *length_vector, INT value) { INT i; - for (i = *length_vector; i > 0; i--) - vector[i] = vector[i - 1]; + for (i = *length_vector; i > 0; i--) vector[i] = vector[i - 1]; vector[0] = value; (*length_vector)++; } - /******************************************************************************* Functionname: FDKsbrEnc_AddRight ******************************************************************************* @@ -200,15 +202,11 @@ FDKsbrEnc_AddLeft (INT *vector, INT *length_vector, INT value) Return: none *******************************************************************************/ -void -FDKsbrEnc_AddRight (INT *vector, INT *length_vector, INT value) -{ +void FDKsbrEnc_AddRight(INT *vector, INT *length_vector, INT value) { vector[*length_vector] = value; (*length_vector)++; } - - /******************************************************************************* Functionname: FDKsbrEnc_AddVecRight ******************************************************************************* @@ -220,15 +218,12 @@ FDKsbrEnc_AddRight (INT *vector, INT *length_vector, INT value) Return: none *******************************************************************************/ -void -FDKsbrEnc_AddVecRight (INT *dst, INT *length_dst, INT *src, INT length_src) -{ +void FDKsbrEnc_AddVecRight(INT *dst, INT *length_dst, INT *src, + INT length_src) { INT i; - for (i = 0; i < length_src; i++) - FDKsbrEnc_AddRight (dst, length_dst, src[i]); + for (i = 0; i < length_src; i++) FDKsbrEnc_AddRight(dst, length_dst, src[i]); } - /***************************************************************************** functionname: FDKsbrEnc_LSI_divide_scale_fract @@ -238,35 +233,33 @@ FDKsbrEnc_AddVecRight (INT *dst, INT *length_dst, INT *src, INT length_src) return: num*scale/denom *****************************************************************************/ -FIXP_DBL FDKsbrEnc_LSI_divide_scale_fract(FIXP_DBL num, FIXP_DBL denom, FIXP_DBL scale) -{ +FIXP_DBL FDKsbrEnc_LSI_divide_scale_fract(FIXP_DBL num, FIXP_DBL denom, + FIXP_DBL scale) { FIXP_DBL tmp = FL2FXCONST_DBL(0.0f); if (num != FL2FXCONST_DBL(0.0f)) { - INT shiftCommon; - INT shiftNum = CountLeadingBits(num); + INT shiftNum = CountLeadingBits(num); INT shiftDenom = CountLeadingBits(denom); INT shiftScale = CountLeadingBits(scale); - num = num << shiftNum; + num = num << shiftNum; scale = scale << shiftScale; - tmp = fMultDiv2(num,scale); + tmp = fMultDiv2(num, scale); - if ( denom > (tmp >> fixMin(shiftNum+shiftScale-1,(DFRACT_BITS-1))) ) { + if (denom > (tmp >> fixMin(shiftNum + shiftScale - 1, (DFRACT_BITS - 1)))) { denom = denom << shiftDenom; - tmp = schur_div(tmp,denom,15); - shiftCommon = fixMin((shiftNum-shiftDenom+shiftScale-1),(DFRACT_BITS-1)); + tmp = schur_div(tmp, denom, 15); + shiftCommon = + fixMin((shiftNum - shiftDenom + shiftScale - 1), (DFRACT_BITS - 1)); if (shiftCommon < 0) tmp <<= -shiftCommon; else - tmp >>= shiftCommon; - } - else { + tmp >>= shiftCommon; + } else { tmp = /*FL2FXCONST_DBL(1.0)*/ (FIXP_DBL)MAXVAL_DBL; } } return (tmp); } - |