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Diffstat (limited to 'libFDK/src/autocorr2nd.cpp')
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diff --git a/libFDK/src/autocorr2nd.cpp b/libFDK/src/autocorr2nd.cpp deleted file mode 100644 index b7eae7c..0000000 --- a/libFDK/src/autocorr2nd.cpp +++ /dev/null @@ -1,278 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -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 ------------------------------------------------------------------------------------------------------------ */ - -/*************************** Fraunhofer IIS FDK Tools *********************** - - 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; - - FIXP_DBL accu1, accu2, accu3, accu4, accu5; - - const FIXP_DBL *pReBuf; - - const FIXP_DBL *realBuf = reBuffer; - - /* - r11r,r22r - r01r,r12r - r02r - */ - pReBuf = realBuf-2; - accu5 = ( (fMultDiv2(pReBuf[0], pReBuf[2]) + - fMultDiv2(pReBuf[1], pReBuf[3])) SHIFT); - pReBuf++; - - //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); - - 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); - accu2 += accu1; - - accu1 += (fPow2Div2(realBuf[len - 2]) SHIFT); - - accu4 = (fMultDiv2(realBuf[-1],realBuf[-2]) SHIFT); - accu4 += accu3; - - accu3 += (fMultDiv2(realBuf[len - 1],realBuf[len - 2]) SHIFT); - - 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 */ - ac->r11r = accu1 << mScale; - ac->r22r = accu2 << mScale; - ac->r01r = accu3 << mScale; - 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 <<= 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; - - 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); - /* - r00r, - r11r,r22r - r01r,r12r - r01i,r12i - r02r,r02i - */ - 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); - } - - 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); - accu0 += accu1; - - 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); - - 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); - - 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 */ - ac->r00r = (FIXP_DBL)accu0 << mScale; - ac->r11r = (FIXP_DBL)accu1 << mScale; - ac->r22r = (FIXP_DBL)accu2 << mScale; - ac->r01r = (FIXP_DBL)accu3 << mScale; - ac->r12r = (FIXP_DBL)accu4 << mScale; - ac->r01i = (FIXP_DBL)accu5 << mScale; - ac->r12i = (FIXP_DBL)accu6 << mScale; - 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 <<= mScale; - ac->det_scale = mScale - 2; - - return autoCorrScaling; -} -#endif /* FUNCTION_autoCorr2nd_cplx */ -#endif /* LOW_POWER_SBR_ONLY */ - - |