diff options
Diffstat (limited to 'libFDK/src/autocorr2nd.cpp')
| -rw-r--r-- | libFDK/src/autocorr2nd.cpp | 283 |
1 files changed, 149 insertions, 134 deletions
diff --git a/libFDK/src/autocorr2nd.cpp b/libFDK/src/autocorr2nd.cpp index b7eae7c..718a555 100644 --- a/libFDK/src/autocorr2nd.cpp +++ b/libFDK/src/autocorr2nd.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 @@ -79,43 +90,35 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ -/*************************** Fraunhofer IIS FDK Tools *********************** +/******************* Library for basic calculation routines ******************** Author(s): M. Lohwasser + Description: auto-correlation functions -******************************************************************************/ +*******************************************************************************/ #include "autocorr2nd.h" - - /* If the accumulator does not provide enough overflow bits, products have to be shifted down in the autocorrelation below. */ #define SHIFT_FACTOR (5) #define SHIFT >> (SHIFT_FACTOR) - -#if defined(__CC_ARM) || defined(__arm__) -#include "arm/autocorr2nd.cpp" -#endif - - /*! * * \brief Calculate second order autocorrelation using 2 accumulators * */ #if !defined(FUNCTION_autoCorr2nd_real) -INT -autoCorr2nd_real (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */ - const FIXP_DBL *reBuffer, /*!< Pointer to to real part of input samples */ - const int len /*!< Number input samples */ - ) -{ - int j, autoCorrScaling, mScale; +INT autoCorr2nd_real( + ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */ + const FIXP_DBL *reBuffer, /*!< Pointer to to real part of input samples */ + const int len /*!< Number input samples */ +) { + int j, autoCorrScaling, mScale; FIXP_DBL accu1, accu2, accu3, accu4, accu5; @@ -128,27 +131,24 @@ autoCorr2nd_real (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coef r01r,r12r r02r */ - pReBuf = realBuf-2; - accu5 = ( (fMultDiv2(pReBuf[0], pReBuf[2]) + - fMultDiv2(pReBuf[1], pReBuf[3])) SHIFT); + pReBuf = realBuf - 2; + accu5 = ((fMultDiv2(pReBuf[0], pReBuf[2]) + fMultDiv2(pReBuf[1], pReBuf[3])) + SHIFT); pReBuf++; - //len must be even + /* len must be even */ accu1 = fPow2Div2(pReBuf[0]) SHIFT; accu3 = fMultDiv2(pReBuf[0], pReBuf[1]) SHIFT; pReBuf++; - for ( j = (len - 2)>>1; j != 0; j--,pReBuf+=2 ) { - - accu1 += ( (fPow2Div2(pReBuf[0]) + - fPow2Div2(pReBuf[1])) SHIFT); + for (j = (len - 2) >> 1; j != 0; j--, pReBuf += 2) { + accu1 += ((fPow2Div2(pReBuf[0]) + fPow2Div2(pReBuf[1])) SHIFT); - accu3 += ( (fMultDiv2(pReBuf[0], pReBuf[1]) + - fMultDiv2(pReBuf[1], pReBuf[2])) SHIFT); - - accu5 += ( (fMultDiv2(pReBuf[0], pReBuf[2]) + - fMultDiv2(pReBuf[1], pReBuf[3])) SHIFT); + accu3 += ((fMultDiv2(pReBuf[0], pReBuf[1]) + + fMultDiv2(pReBuf[1], pReBuf[2])) SHIFT); + accu5 += ((fMultDiv2(pReBuf[0], pReBuf[2]) + + fMultDiv2(pReBuf[1], pReBuf[3])) SHIFT); } accu2 = (fPow2Div2(realBuf[-2]) SHIFT); @@ -156,12 +156,14 @@ autoCorr2nd_real (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coef accu1 += (fPow2Div2(realBuf[len - 2]) SHIFT); - accu4 = (fMultDiv2(realBuf[-1],realBuf[-2]) SHIFT); + accu4 = (fMultDiv2(realBuf[-1], realBuf[-2]) SHIFT); accu4 += accu3; - accu3 += (fMultDiv2(realBuf[len - 1],realBuf[len - 2]) SHIFT); + accu3 += (fMultDiv2(realBuf[len - 1], realBuf[len - 2]) SHIFT); - mScale = CntLeadingZeros( (accu1 | accu2 | fAbs(accu3) | fAbs(accu4) | fAbs(accu5)) ) - 1; + mScale = CntLeadingZeros( + (accu1 | accu2 | fAbs(accu3) | fAbs(accu4) | fAbs(accu5))) - + 1; autoCorrScaling = mScale - 1 - SHIFT_FACTOR; /* -1 because of fMultDiv2*/ /* Scale to common scale factor */ @@ -171,36 +173,33 @@ autoCorr2nd_real (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coef ac->r12r = accu4 << mScale; ac->r02r = accu5 << mScale; - ac->det = (fMultDiv2(ac->r11r,ac->r22r) - fMultDiv2(ac->r12r,ac->r12r)) ; - mScale = CountLeadingBits(fAbs(ac->det)); + ac->det = (fMultDiv2(ac->r11r, ac->r22r) - fMultDiv2(ac->r12r, ac->r12r)); + mScale = CountLeadingBits(fAbs(ac->det)); - ac->det <<= mScale; + ac->det <<= mScale; ac->det_scale = mScale - 1; return autoCorrScaling; } #endif -#ifndef LOW_POWER_SBR_ONLY #if !defined(FUNCTION_autoCorr2nd_cplx) -INT -autoCorr2nd_cplx (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */ - const FIXP_DBL *reBuffer, /*!< Pointer to real part of input samples */ - const FIXP_DBL *imBuffer, /*!< Pointer to imag part of input samples */ - const int len /*!< Number of input samples */ - ) -{ - - int j, autoCorrScaling, mScale, len_scale; +INT autoCorr2nd_cplx( + ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */ + const FIXP_DBL *reBuffer, /*!< Pointer to real part of input samples */ + const FIXP_DBL *imBuffer, /*!< Pointer to imag part of input samples */ + const int len /*!< Number of input samples (should be smaller than 128) */ +) { + int j, autoCorrScaling, mScale, len_scale; - FIXP_DBL accu0, accu1,accu2, accu3, accu4, accu5, accu6, accu7, accu8; + FIXP_DBL accu0, accu1, accu2, accu3, accu4, accu5, accu6, accu7, accu8; const FIXP_DBL *pReBuf, *pImBuf; const FIXP_DBL *realBuf = reBuffer; const FIXP_DBL *imagBuf = imBuffer; - (len>64) ? (len_scale = 6) : (len_scale = 5); + (len > 64) ? (len_scale = 6) : (len_scale = 5); /* r00r, r11r,r22r @@ -210,46 +209,63 @@ autoCorr2nd_cplx (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coe */ accu1 = accu3 = accu5 = accu7 = accu8 = FL2FXCONST_DBL(0.0f); - pReBuf = realBuf-2, pImBuf = imagBuf-2; - accu7 += ( (fMultDiv2(pReBuf[2], pReBuf[0]) + fMultDiv2(pImBuf[2], pImBuf[0])) >> len_scale); - accu8 += ( (fMultDiv2(pImBuf[2], pReBuf[0]) - fMultDiv2(pReBuf[2], pImBuf[0])) >> len_scale); - - pReBuf = realBuf-1, pImBuf = imagBuf-1; - for ( j = (len - 1); j != 0; j--,pReBuf++,pImBuf++ ){ - accu1 += ( (fPow2Div2(pReBuf[0] ) + fPow2Div2(pImBuf[0] )) >> len_scale); - accu3 += ( (fMultDiv2(pReBuf[0], pReBuf[1]) + fMultDiv2(pImBuf[0], pImBuf[1])) >> len_scale); - accu5 += ( (fMultDiv2(pImBuf[1], pReBuf[0]) - fMultDiv2(pReBuf[1], pImBuf[0])) >> len_scale); - accu7 += ( (fMultDiv2(pReBuf[2], pReBuf[0]) + fMultDiv2(pImBuf[2], pImBuf[0])) >> len_scale); - accu8 += ( (fMultDiv2(pImBuf[2], pReBuf[0]) - fMultDiv2(pReBuf[2], pImBuf[0])) >> len_scale); + pReBuf = realBuf - 2, pImBuf = imagBuf - 2; + accu7 += + ((fMultDiv2(pReBuf[2], pReBuf[0]) + fMultDiv2(pImBuf[2], pImBuf[0])) >> + len_scale); + accu8 += + ((fMultDiv2(pImBuf[2], pReBuf[0]) - fMultDiv2(pReBuf[2], pImBuf[0])) >> + len_scale); + + pReBuf = realBuf - 1, pImBuf = imagBuf - 1; + for (j = (len - 1); j != 0; j--, pReBuf++, pImBuf++) { + accu1 += ((fPow2Div2(pReBuf[0]) + fPow2Div2(pImBuf[0])) >> len_scale); + accu3 += + ((fMultDiv2(pReBuf[0], pReBuf[1]) + fMultDiv2(pImBuf[0], pImBuf[1])) >> + len_scale); + accu5 += + ((fMultDiv2(pImBuf[1], pReBuf[0]) - fMultDiv2(pReBuf[1], pImBuf[0])) >> + len_scale); + accu7 += + ((fMultDiv2(pReBuf[2], pReBuf[0]) + fMultDiv2(pImBuf[2], pImBuf[0])) >> + len_scale); + accu8 += + ((fMultDiv2(pImBuf[2], pReBuf[0]) - fMultDiv2(pReBuf[2], pImBuf[0])) >> + len_scale); } - accu2 = ( (fPow2Div2(realBuf[-2]) + fPow2Div2(imagBuf[-2])) >> len_scale); + accu2 = ((fPow2Div2(realBuf[-2]) + fPow2Div2(imagBuf[-2])) >> len_scale); accu2 += accu1; - accu1 += ( (fPow2Div2(realBuf[len-2]) + - fPow2Div2(imagBuf[len-2])) >> len_scale); - accu0 = ( (fPow2Div2(realBuf[len-1]) + - fPow2Div2(imagBuf[len-1])) >> len_scale) - - ( (fPow2Div2(realBuf[-1]) + - fPow2Div2(imagBuf[-1])) >> len_scale); + accu1 += ((fPow2Div2(realBuf[len - 2]) + fPow2Div2(imagBuf[len - 2])) >> + len_scale); + accu0 = ((fPow2Div2(realBuf[len - 1]) + fPow2Div2(imagBuf[len - 1])) >> + len_scale) - + ((fPow2Div2(realBuf[-1]) + fPow2Div2(imagBuf[-1])) >> len_scale); accu0 += accu1; - accu4 = ( (fMultDiv2(realBuf[-1], realBuf[-2]) + - fMultDiv2(imagBuf[-1], imagBuf[-2])) >> len_scale); + accu4 = ((fMultDiv2(realBuf[-1], realBuf[-2]) + + fMultDiv2(imagBuf[-1], imagBuf[-2])) >> + len_scale); accu4 += accu3; - accu3 += ( (fMultDiv2(realBuf[len-1], realBuf[len-2]) + - fMultDiv2(imagBuf[len-1], imagBuf[len-2])) >> len_scale); + accu3 += ((fMultDiv2(realBuf[len - 1], realBuf[len - 2]) + + fMultDiv2(imagBuf[len - 1], imagBuf[len - 2])) >> + len_scale); - accu6 = ( (fMultDiv2(imagBuf[-1], realBuf[-2]) - - fMultDiv2(realBuf[-1], imagBuf[-2])) >> len_scale); + accu6 = ((fMultDiv2(imagBuf[-1], realBuf[-2]) - + fMultDiv2(realBuf[-1], imagBuf[-2])) >> + len_scale); accu6 += accu5; - accu5 += ( (fMultDiv2(imagBuf[len - 1], realBuf[len - 2]) - - fMultDiv2(realBuf[len - 1], imagBuf[len - 2])) >> len_scale); + accu5 += ((fMultDiv2(imagBuf[len - 1], realBuf[len - 2]) - + fMultDiv2(realBuf[len - 1], imagBuf[len - 2])) >> + len_scale); - mScale = CntLeadingZeros( (accu0 | accu1 | accu2 | fAbs(accu3) | fAbs(accu4) | fAbs(accu5) | - fAbs(accu6) | fAbs(accu7) | fAbs(accu8)) ) - 1; + mScale = + CntLeadingZeros((accu0 | accu1 | accu2 | fAbs(accu3) | fAbs(accu4) | + fAbs(accu5) | fAbs(accu6) | fAbs(accu7) | fAbs(accu8))) - + 1; autoCorrScaling = mScale - 1 - len_scale; /* -1 because of fMultDiv2*/ /* Scale to common scale factor */ @@ -263,16 +279,15 @@ autoCorr2nd_cplx (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coe ac->r02r = (FIXP_DBL)accu7 << mScale; ac->r02i = (FIXP_DBL)accu8 << mScale; - ac->det = ( fMultDiv2(ac->r11r,ac->r22r) >> 1 ) - - ( (fMultDiv2(ac->r12r,ac->r12r) + fMultDiv2(ac->r12i,ac->r12i)) >> 1 ); - mScale = CountLeadingBits(fAbs(ac->det)); + ac->det = + (fMultDiv2(ac->r11r, ac->r22r) >> 1) - + ((fMultDiv2(ac->r12r, ac->r12r) + fMultDiv2(ac->r12i, ac->r12i)) >> 1); + mScale = CntLeadingZeros(fAbs(ac->det)) - 1; ac->det <<= mScale; ac->det_scale = mScale - 2; return autoCorrScaling; } -#endif /* FUNCTION_autoCorr2nd_cplx */ -#endif /* LOW_POWER_SBR_ONLY */ - +#endif /* FUNCTION_autoCorr2nd_cplx */ |