/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android © 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. 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 ----------------------------------------------------------------------------- */ /******************* Library for basic calculation routines ******************** Author(s): Description: Scaling operations *******************************************************************************/ #include "common_fix.h" #include "genericStds.h" /************************************************** * Inline definitions **************************************************/ #include "scale.h" #if defined(__mips__) #include "mips/scale_mips.cpp" #elif defined(__arm__) #include "arm/scale_arm.cpp" #endif #ifndef FUNCTION_scaleValues_SGL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param len must be larger than 4 * \return void * */ #define FUNCTION_scaleValues_SGL void scaleValues(FIXP_SGL *vector, /*!< Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) return; if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)(FRACT_BITS - 1)); for (i = len & 3; i--;) { *(vector++) <<= scalefactor; } for (i = len >> 2; i--;) { *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)FRACT_BITS - 1); for (i = len & 3; i--;) { *(vector++) >>= negScalefactor; } for (i = len >> 2; i--;) { *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; } } } #endif #ifndef FUNCTION_scaleValues_DBL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param len must be larger than 4 * \return void * */ #define FUNCTION_scaleValues_DBL SCALE_INLINE void scaleValues(FIXP_DBL *vector, /*!< Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) return; if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(vector++) <<= scalefactor; } for (i = len >> 2; i--;) { *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; *(vector++) <<= scalefactor; } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(vector++) >>= negScalefactor; } for (i = len >> 2; i--;) { *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; *(vector++) >>= negScalefactor; } } } #endif #ifndef FUNCTION_scaleValuesSaturate_DBL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param vector source/destination buffer * \param len length of vector * \param scalefactor amount of shifts to be applied * \return void * */ #define FUNCTION_scaleValuesSaturate_DBL SCALE_INLINE void scaleValuesSaturate(FIXP_DBL *vector, /*!< Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) return; scalefactor = fixmax_I(fixmin_I(scalefactor, (INT)DFRACT_BITS - 1), (INT) - (DFRACT_BITS - 1)); for (i = 0; i < len; i++) { vector[i] = scaleValueSaturate(vector[i], scalefactor); } } #endif /* FUNCTION_scaleValuesSaturate_DBL */ #ifndef FUNCTION_scaleValuesSaturate_DBL_DBL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param dst destination buffer * \param src source buffer * \param len length of vector * \param scalefactor amount of shifts to be applied * \return void * */ #define FUNCTION_scaleValuesSaturate_DBL_DBL SCALE_INLINE void scaleValuesSaturate(FIXP_DBL *dst, /*!< Output */ FIXP_DBL *src, /*!< Input */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) { FDKmemmove(dst, src, len * sizeof(FIXP_DBL)); return; } scalefactor = fixmax_I(fixmin_I(scalefactor, (INT)DFRACT_BITS - 1), (INT) - (DFRACT_BITS - 1)); for (i = 0; i < len; i++) { dst[i] = scaleValueSaturate(src[i], scalefactor); } } #endif /* FUNCTION_scaleValuesSaturate_DBL_DBL */ #ifndef FUNCTION_scaleValuesSaturate_SGL_DBL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param dst destination buffer (FIXP_SGL) * \param src source buffer (FIXP_DBL) * \param len length of vector * \param scalefactor amount of shifts to be applied * \return void * */ #define FUNCTION_scaleValuesSaturate_SGL_DBL SCALE_INLINE void scaleValuesSaturate(FIXP_SGL *dst, /*!< Output */ FIXP_DBL *src, /*!< Input */ INT len, /*!< Length */ INT scalefactor) /*!< Scalefactor */ { INT i; scalefactor = fixmax_I(fixmin_I(scalefactor, (INT)DFRACT_BITS - 1), (INT) - (DFRACT_BITS - 1)); for (i = 0; i < len; i++) { dst[i] = FX_DBL2FX_SGL(fAddSaturate(scaleValueSaturate(src[i], scalefactor), (FIXP_DBL)0x8000)); } } #endif /* FUNCTION_scaleValuesSaturate_SGL_DBL */ #ifndef FUNCTION_scaleValuesSaturate_SGL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param vector source/destination buffer * \param len length of vector * \param scalefactor amount of shifts to be applied * \return void * */ #define FUNCTION_scaleValuesSaturate_SGL SCALE_INLINE void scaleValuesSaturate(FIXP_SGL *vector, /*!< Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) return; scalefactor = fixmax_I(fixmin_I(scalefactor, (INT)DFRACT_BITS - 1), (INT) - (DFRACT_BITS - 1)); for (i = 0; i < len; i++) { vector[i] = FX_DBL2FX_SGL( scaleValueSaturate(FX_SGL2FX_DBL(vector[i]), scalefactor)); } } #endif /* FUNCTION_scaleValuesSaturate_SGL */ #ifndef FUNCTION_scaleValuesSaturate_SGL_SGL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param dst destination buffer * \param src source buffer * \param len length of vector * \param scalefactor amount of shifts to be applied * \return void * */ #define FUNCTION_scaleValuesSaturate_SGL_SGL SCALE_INLINE void scaleValuesSaturate(FIXP_SGL *dst, /*!< Output */ FIXP_SGL *src, /*!< Input */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) { FDKmemmove(dst, src, len * sizeof(FIXP_SGL)); return; } scalefactor = fixmax_I(fixmin_I(scalefactor, (INT)DFRACT_BITS - 1), (INT) - (DFRACT_BITS - 1)); for (i = 0; i < len; i++) { dst[i] = FX_DBL2FX_SGL(scaleValueSaturate(FX_SGL2FX_DBL(src[i]), scalefactor)); } } #endif /* FUNCTION_scaleValuesSaturate_SGL_SGL */ #ifndef FUNCTION_scaleValues_DBLDBL /*! * * \brief Multiply input vector src by \f$ 2^{scalefactor} \f$ * and place result into dst * \param dst detination buffer * \param src source buffer * \param len must be larger than 4 * \param scalefactor amount of left shifts to be applied * \return void * */ #define FUNCTION_scaleValues_DBLDBL SCALE_INLINE void scaleValues(FIXP_DBL *dst, /*!< dst Vector */ const FIXP_DBL *src, /*!< src Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) { if (dst != src) FDKmemmove(dst, src, len * sizeof(FIXP_DBL)); } else { if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = *(src++) << scalefactor; } for (i = len >> 2; i--;) { *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = *(src++) >> negScalefactor; } for (i = len >> 2; i--;) { *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; } } } } #endif #if (SAMPLE_BITS == 16) #ifndef FUNCTION_scaleValues_PCMDBL /*! * * \brief Multiply input vector src by \f$ 2^{scalefactor} \f$ * and place result into dst * \param dst detination buffer * \param src source buffer * \param len must be larger than 4 * \param scalefactor amount of left shifts to be applied * \return void * */ #define FUNCTION_scaleValues_PCMDBL SCALE_INLINE void scaleValues(FIXP_PCM *dst, /*!< dst Vector */ const FIXP_DBL *src, /*!< src Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; scalefactor -= DFRACT_BITS - SAMPLE_BITS; /* Return if scalefactor is Zero */ { if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = (FIXP_PCM)(*(src++) << scalefactor); } for (i = len >> 2; i--;) { *(dst++) = (FIXP_PCM)(*(src++) << scalefactor); *(dst++) = (FIXP_PCM)(*(src++) << scalefactor); *(dst++) = (FIXP_PCM)(*(src++) << scalefactor); *(dst++) = (FIXP_PCM)(*(src++) << scalefactor); } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = (FIXP_PCM)(*(src++) >> negScalefactor); } for (i = len >> 2; i--;) { *(dst++) = (FIXP_PCM)(*(src++) >> negScalefactor); *(dst++) = (FIXP_PCM)(*(src++) >> negScalefactor); *(dst++) = (FIXP_PCM)(*(src++) >> negScalefactor); *(dst++) = (FIXP_PCM)(*(src++) >> negScalefactor); } } } } #endif #endif /* (SAMPLE_BITS == 16) */ #ifndef FUNCTION_scaleValues_SGLSGL /*! * * \brief Multiply input vector src by \f$ 2^{scalefactor} \f$ * and place result into dst * \param dst detination buffer * \param src source buffer * \param len must be larger than 4 * \param scalefactor amount of left shifts to be applied * \return void * */ #define FUNCTION_scaleValues_SGLSGL SCALE_INLINE void scaleValues(FIXP_SGL *dst, /*!< dst Vector */ const FIXP_SGL *src, /*!< src Vector */ INT len, /*!< Length */ INT scalefactor /*!< Scalefactor */ ) { INT i; /* Return if scalefactor is Zero */ if (scalefactor == 0) { if (dst != src) FDKmemmove(dst, src, len * sizeof(FIXP_DBL)); } else { if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = *(src++) << scalefactor; } for (i = len >> 2; i--;) { *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; *(dst++) = *(src++) << scalefactor; } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *(dst++) = *(src++) >> negScalefactor; } for (i = len >> 2; i--;) { *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; *(dst++) = *(src++) >> negScalefactor; } } } } #endif #ifndef FUNCTION_scaleValuesWithFactor_DBL /*! * * \brief Multiply input vector by \f$ 2^{scalefactor} \f$ * \param len must be larger than 4 * \return void * */ #define FUNCTION_scaleValuesWithFactor_DBL SCALE_INLINE void scaleValuesWithFactor(FIXP_DBL *vector, FIXP_DBL factor, INT len, INT scalefactor) { INT i; /* Compensate fMultDiv2 */ scalefactor++; if (scalefactor > 0) { scalefactor = fixmin_I(scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *vector = fMultDiv2(*vector, factor) << scalefactor; vector++; } for (i = len >> 2; i--;) { *vector = fMultDiv2(*vector, factor) << scalefactor; vector++; *vector = fMultDiv2(*vector, factor) << scalefactor; vector++; *vector = fMultDiv2(*vector, factor) << scalefactor; vector++; *vector = fMultDiv2(*vector, factor) << scalefactor; vector++; } } else { INT negScalefactor = fixmin_I(-scalefactor, (INT)DFRACT_BITS - 1); for (i = len & 3; i--;) { *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++; } for (i = len >> 2; i--;) { *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++; *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++; *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++; *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++; } } } #endif /* FUNCTION_scaleValuesWithFactor_DBL */ /******************************************* IMPORTANT NOTE for usage of getScalefactor() If the input array contains negative values too, then these functions may sometimes return the actual maximum value minus 1, due to the nature of the applied algorithm. So be careful with possible fractional -1 values that may lead to overflows when being fPow2()'ed. ********************************************/ #ifndef FUNCTION_getScalefactorShort /*! * * \brief Calculate max possible scale factor for input vector of shorts * * \return Maximum scale factor / possible left shift * */ #define FUNCTION_getScalefactorShort SCALE_INLINE INT getScalefactorShort(const SHORT *vector, /*!< Pointer to input vector */ INT len /*!< Length of input vector */ ) { INT i; SHORT temp, maxVal = 0; for (i = len; i != 0; i--) { temp = (SHORT)(*vector++); maxVal |= (temp ^ (temp >> (SHORT_BITS - 1))); } return fixmax_I((INT)0, (INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SHORT_BITS))); } #endif #ifndef FUNCTION_getScalefactorPCM /*! * * \brief Calculate max possible scale factor for input vector of shorts * * \return Maximum scale factor * */ #define FUNCTION_getScalefactorPCM SCALE_INLINE INT getScalefactorPCM(const INT_PCM *vector, /*!< Pointer to input vector */ INT len, /*!< Length of input vector */ INT stride) { INT i; INT_PCM temp, maxVal = 0; for (i = len; i != 0; i--) { temp = (INT_PCM)(*vector); vector += stride; maxVal |= (temp ^ (temp >> ((sizeof(INT_PCM) * 8) - 1))); } return fixmax_I((INT)0, (INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SAMPLE_BITS))); } #endif #ifndef FUNCTION_getScalefactorShort /*! * * \brief Calculate max possible scale factor for input vector of shorts * \param stride, item increment between vector members. * \return Maximum scale factor * */ #define FUNCTION_getScalefactorShort SCALE_INLINE INT getScalefactorShort(const SHORT *vector, /*!< Pointer to input vector */ INT len, /*!< Length of input vector */ INT stride) { INT i; SHORT temp, maxVal = 0; for (i = len; i != 0; i--) { temp = (SHORT)(*vector); vector += stride; maxVal |= (temp ^ (temp >> (SHORT_BITS - 1))); } return fixmax_I((INT)0, (INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SHORT_BITS))); } #endif #ifndef FUNCTION_getScalefactor_DBL /*! * * \brief Calculate max possible scale factor for input vector * * \return Maximum scale factor * * This function can constitute a significant amount of computational * complexity - very much depending on the bitrate. Since it is a rather small * function, effective assembler optimization might be possible. * * If all data is 0xFFFF.FFFF or 0x0000.0000 function returns 31 * Note: You can skip data normalization only if return value is 0 * */ #define FUNCTION_getScalefactor_DBL SCALE_INLINE INT getScalefactor(const FIXP_DBL *vector, /*!< Pointer to input vector */ INT len) /*!< Length of input vector */ { INT i; FIXP_DBL temp, maxVal = (FIXP_DBL)0; for (i = len; i != 0; i--) { temp = (LONG)(*vector++); maxVal |= (FIXP_DBL)((LONG)temp ^ (LONG)(temp >> (DFRACT_BITS - 1))); } return fixmax_I((INT)0, (INT)(fixnormz_D(maxVal) - 1)); } #endif #ifndef FUNCTION_getScalefactor_SGL #define FUNCTION_getScalefactor_SGL SCALE_INLINE INT getScalefactor(const FIXP_SGL *vector, /*!< Pointer to input vector */ INT len) /*!< Length of input vector */ { INT i; SHORT temp, maxVal = (FIXP_SGL)0; for (i = len; i != 0; i--) { temp = (SHORT)(*vector++); maxVal |= (temp ^ (temp >> (FRACT_BITS - 1))); } return fixmax_I((INT)0, (INT)(fixnormz_S((FIXP_SGL)maxVal)) - 1); } #endif