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Diffstat (limited to 'fdk-aac/libFDK/include/scale.h')
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diff --git a/fdk-aac/libFDK/include/scale.h b/fdk-aac/libFDK/include/scale.h new file mode 100644 index 0000000..30fa089 --- /dev/null +++ b/fdk-aac/libFDK/include/scale.h @@ -0,0 +1,298 @@ +/* ----------------------------------------------------------------------------- +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 + +*******************************************************************************/ + +#ifndef SCALE_H +#define SCALE_H + +#include "common_fix.h" +#include "genericStds.h" +#include "fixminmax.h" + +#define SCALE_INLINE + +#if defined(__arm__) +#include "arm/scale_arm.h" + +#elif defined(__mips__) +#include "mips/scale_mips.h" + +#endif + +void scaleValues(FIXP_SGL *vector, INT len, INT scalefactor); +void scaleValues(FIXP_DBL *vector, INT len, INT scalefactor); +void scaleValues(FIXP_DBL *dst, const FIXP_DBL *src, INT len, INT scalefactor); +#if (SAMPLE_BITS == 16) +void scaleValues(FIXP_PCM *dst, const FIXP_DBL *src, INT len, INT scalefactor); +#endif +void scaleValues(FIXP_PCM *dst, const FIXP_SGL *src, INT len, INT scalefactor); +void scaleCplxValues(FIXP_DBL *r_dst, FIXP_DBL *i_dst, const FIXP_DBL *r_src, + const FIXP_DBL *i_src, INT len, INT scalefactor); +void scaleValuesWithFactor(FIXP_DBL *vector, FIXP_DBL factor, INT len, + INT scalefactor); +void scaleValuesSaturate(FIXP_DBL *vector, INT len, INT scalefactor); +void scaleValuesSaturate(FIXP_DBL *dst, FIXP_DBL *src, INT len, + INT scalefactor); +void scaleValuesSaturate(FIXP_SGL *dst, FIXP_DBL *src, INT len, + INT scalefactor); +void scaleValuesSaturate(INT_PCM *dst, FIXP_DBL *src, INT len, INT scalefactor); +void scaleValuesSaturate(FIXP_SGL *vector, INT len, INT scalefactor); +void scaleValuesSaturate(FIXP_SGL *dst, FIXP_SGL *src, INT len, + INT scalefactor); +void scaleValuesSaturate(INT_PCM *dst, INT_PCM *src, INT len, INT scalefactor); +INT getScalefactorShort(const SHORT *vector, INT len); +INT getScalefactorPCM(const INT_PCM *vector, INT len, INT stride); +INT getScalefactor(const FIXP_DBL *vector, INT len); +INT getScalefactor(const FIXP_SGL *vector, INT len); + +#ifndef FUNCTION_scaleValue +/*! + * + * \brief Multiply input by \f$ 2^{scalefactor} \f$ + * + * \return Scaled input + * + */ +#define FUNCTION_scaleValue +inline FIXP_DBL scaleValue(const FIXP_DBL value, /*!< Value */ + INT scalefactor /*!< Scalefactor */ +) { + if (scalefactor > 0) + return (value << scalefactor); + else + return (value >> (-scalefactor)); +} +inline FIXP_SGL scaleValue(const FIXP_SGL value, /*!< Value */ + INT scalefactor /*!< Scalefactor */ +) { + if (scalefactor > 0) + return (value << scalefactor); + else + return (value >> (-scalefactor)); +} +#endif + +#ifndef FUNCTION_scaleValueSaturate +/*! + * + * \brief Multiply input by \f$ 2^{scalefactor} \f$ + * \param value The value to be scaled. + * \param the shift amount + * \return \f$ value * 2^scalefactor \f$ + * + */ +#define FUNCTION_scaleValueSaturate +inline FIXP_DBL scaleValueSaturate(const FIXP_DBL value, + INT scalefactor /* in range -31 ... +31 */ +) { + int headroom = fixnormz_D( + (INT)value ^ (INT)((value >> 31))); /* headroom in range 1...32 */ + if (scalefactor >= 0) { + /* shift left: saturate in case of headroom less/equal scalefactor */ + if (headroom <= scalefactor) { + if (value > (FIXP_DBL)0) + return (FIXP_DBL)MAXVAL_DBL; /* 0x7FFF.FFFF */ + else + return (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1; /* 0x8000.0001 */ + } else { + return fMax((value << scalefactor), (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1); + } + } else { + scalefactor = -scalefactor; + /* shift right: clear in case of 32-headroom greater/equal -scalefactor */ + if ((DFRACT_BITS - headroom) <= scalefactor) { + return (FIXP_DBL)0; + } else { + return fMax((value >> scalefactor), (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1); + } + } +} +#endif + +#ifndef FUNCTION_scaleValueInPlace +/*! + * + * \brief Multiply input by \f$ 2^{scalefactor} \f$ in place + * + * \return void + * + */ +#define FUNCTION_scaleValueInPlace +inline void scaleValueInPlace(FIXP_DBL *value, /*!< Value */ + INT scalefactor /*!< Scalefactor */ +) { + INT newscale; + /* Note: The assignment inside the if conditional allows combining a load with + * the compare to zero (on ARM and maybe others) */ + if ((newscale = (scalefactor)) >= 0) { + *(value) <<= newscale; + } else { + *(value) >>= -newscale; + } +} +#endif + + /*! + * + * \brief Scale input value by 2^{scale} and saturate output to 2^{dBits-1} + * \return scaled and saturated value + * + * This macro scales src value right or left and applies saturation to + * (2^dBits)-1 maxima output. + */ + +#ifndef SATURATE_RIGHT_SHIFT +#define SATURATE_RIGHT_SHIFT(src, scale, dBits) \ + ((((LONG)(src) >> (scale)) > (LONG)(((1U) << ((dBits)-1)) - 1)) \ + ? (LONG)(((1U) << ((dBits)-1)) - 1) \ + : (((LONG)(src) >> (scale)) < ~((LONG)(((1U) << ((dBits)-1)) - 1))) \ + ? ~((LONG)(((1U) << ((dBits)-1)) - 1)) \ + : ((LONG)(src) >> (scale))) +#endif + +#ifndef SATURATE_LEFT_SHIFT +#define SATURATE_LEFT_SHIFT(src, scale, dBits) \ + (((LONG)(src) > ((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \ + ? (LONG)(((1U) << ((dBits)-1)) - 1) \ + : ((LONG)(src) < ~((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \ + ? ~((LONG)(((1U) << ((dBits)-1)) - 1)) \ + : ((LONG)(src) << (scale))) +#endif + +#ifndef SATURATE_SHIFT +#define SATURATE_SHIFT(src, scale, dBits) \ + (((scale) < 0) ? SATURATE_LEFT_SHIFT((src), -(scale), (dBits)) \ + : SATURATE_RIGHT_SHIFT((src), (scale), (dBits))) +#endif + +/* + * Alternative shift and saturate left, saturates to -0.99999 instead of -1.0000 + * to avoid problems when inverting the sign of the result. + */ +#ifndef SATURATE_LEFT_SHIFT_ALT +#define SATURATE_LEFT_SHIFT_ALT(src, scale, dBits) \ + (((LONG)(src) > ((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \ + ? (LONG)(((1U) << ((dBits)-1)) - 1) \ + : ((LONG)(src) <= ~((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \ + ? ~((LONG)(((1U) << ((dBits)-1)) - 2)) \ + : ((LONG)(src) << (scale))) +#endif + +#ifndef SATURATE_RIGHT_SHIFT_ALT +#define SATURATE_RIGHT_SHIFT_ALT(src, scale, dBits) \ + ((((LONG)(src) >> (scale)) > (LONG)(((1U) << ((dBits)-1)) - 1)) \ + ? (LONG)(((1U) << ((dBits)-1)) - 1) \ + : (((LONG)(src) >> (scale)) < ~((LONG)(((1U) << ((dBits)-1)) - 2))) \ + ? ~((LONG)(((1U) << ((dBits)-1)) - 2)) \ + : ((LONG)(src) >> (scale))) +#endif + +#ifndef SATURATE_INT_PCM_RIGHT_SHIFT +#define SATURATE_INT_PCM_RIGHT_SHIFT(src, scale) \ + SATURATE_RIGHT_SHIFT(src, scale, SAMPLE_BITS) +#endif + +#ifndef SATURATE_INT_PCM_LEFT_SHIFT +#define SATURATE_INT_PCM_LEFT_SHIFT(src, scale) \ + SATURATE_LEFT_SHIFT(src, scale, SAMPLE_BITS) +#endif + +#endif /* #ifndef SCALE_H */ |