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9d40b65b15
Bug: 145669510 Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc Change-Id: Ib69a4f12405026d3165193f0192eb25eaed7e797
297 lines
11 KiB
C
297 lines
11 KiB
C
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/******************* Library for basic calculation routines ********************
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Author(s):
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Description: Scaling operations
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*******************************************************************************/
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#ifndef SCALE_H
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#define SCALE_H
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#include "common_fix.h"
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#include "genericStds.h"
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#include "fixminmax.h"
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#define SCALE_INLINE
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#if defined(__arm__)
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#include "arm/scale_arm.h"
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#elif defined(__mips__)
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#include "mips/scale_mips.h"
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#endif
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void scaleValues(FIXP_SGL *vector, INT len, INT scalefactor);
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void scaleValues(FIXP_DBL *vector, INT len, INT scalefactor);
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void scaleValues(FIXP_DBL *dst, const FIXP_DBL *src, INT len, INT scalefactor);
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#if (SAMPLE_BITS == 16)
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void scaleValues(FIXP_PCM *dst, const FIXP_DBL *src, INT len, INT scalefactor);
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#endif
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void scaleValues(FIXP_SGL *dst, const FIXP_SGL *src, INT len, INT scalefactor);
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void scaleCplxValues(FIXP_DBL *r_dst, FIXP_DBL *i_dst, const FIXP_DBL *r_src,
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const FIXP_DBL *i_src, INT len, INT scalefactor);
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void scaleValuesWithFactor(FIXP_DBL *vector, FIXP_DBL factor, INT len,
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INT scalefactor);
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void scaleValuesSaturate(FIXP_DBL *vector, INT len, INT scalefactor);
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void scaleValuesSaturate(FIXP_DBL *dst, const FIXP_DBL *src, INT len,
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INT scalefactor);
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void scaleValuesSaturate(FIXP_SGL *dst, const FIXP_DBL *src, INT len,
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INT scalefactor);
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void scaleValuesSaturate(FIXP_SGL *vector, INT len, INT scalefactor);
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void scaleValuesSaturate(FIXP_SGL *dst, const FIXP_SGL *src, INT len,
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INT scalefactor);
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INT getScalefactorShort(const SHORT *vector, INT len);
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INT getScalefactorPCM(const INT_PCM *vector, INT len, INT stride);
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INT getScalefactor(const FIXP_DBL *vector, INT len);
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INT getScalefactor(const FIXP_SGL *vector, INT len);
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#ifndef FUNCTION_scaleValue
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/*!
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*
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* \brief Multiply input by \f$ 2^{scalefactor} \f$
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*
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* \return Scaled input
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*
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*/
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#define FUNCTION_scaleValue
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inline FIXP_DBL scaleValue(const FIXP_DBL value, /*!< Value */
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INT scalefactor /*!< Scalefactor */
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) {
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if (scalefactor > 0)
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return (value << scalefactor);
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else
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return (value >> (-scalefactor));
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}
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inline FIXP_SGL scaleValue(const FIXP_SGL value, /*!< Value */
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INT scalefactor /*!< Scalefactor */
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) {
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if (scalefactor > 0)
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return (value << scalefactor);
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else
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return (value >> (-scalefactor));
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}
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#endif
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#ifndef FUNCTION_scaleValueSaturate
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/*!
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*
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* \brief Multiply input by \f$ 2^{scalefactor} \f$
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* \param value The value to be scaled.
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* \param the shift amount
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* \return \f$ value * 2^scalefactor \f$
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*
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*/
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#define FUNCTION_scaleValueSaturate
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inline FIXP_DBL scaleValueSaturate(const FIXP_DBL value,
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INT scalefactor /* in range -31 ... +31 */
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) {
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int headroom = fixnormz_D(
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(INT)value ^ (INT)((value >> 31))); /* headroom in range 1...32 */
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if (scalefactor >= 0) {
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/* shift left: saturate in case of headroom less/equal scalefactor */
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if (headroom <= scalefactor) {
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if (value > (FIXP_DBL)0)
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return (FIXP_DBL)MAXVAL_DBL; /* 0x7FFF.FFFF */
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else
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return (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1; /* 0x8000.0001 */
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} else {
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return fMax((value << scalefactor), (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1);
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}
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} else {
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scalefactor = -scalefactor;
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/* shift right: clear in case of 32-headroom greater/equal -scalefactor */
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if ((DFRACT_BITS - headroom) <= scalefactor) {
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return (FIXP_DBL)0;
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} else {
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return fMax((value >> scalefactor), (FIXP_DBL)MINVAL_DBL + (FIXP_DBL)1);
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}
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}
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}
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#endif
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#ifndef FUNCTION_scaleValueInPlace
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/*!
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*
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* \brief Multiply input by \f$ 2^{scalefactor} \f$ in place
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*
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* \return void
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*
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*/
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#define FUNCTION_scaleValueInPlace
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inline void scaleValueInPlace(FIXP_DBL *value, /*!< Value */
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INT scalefactor /*!< Scalefactor */
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) {
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INT newscale;
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/* Note: The assignment inside the if conditional allows combining a load with
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* the compare to zero (on ARM and maybe others) */
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if ((newscale = (scalefactor)) >= 0) {
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*(value) <<= newscale;
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} else {
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*(value) >>= -newscale;
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}
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}
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#endif
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/*!
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*
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* \brief Scale input value by 2^{scale} and saturate output to 2^{dBits-1}
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* \return scaled and saturated value
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*
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* This macro scales src value right or left and applies saturation to
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* (2^dBits)-1 maxima output.
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*/
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#ifndef SATURATE_RIGHT_SHIFT
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#define SATURATE_RIGHT_SHIFT(src, scale, dBits) \
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((((LONG)(src) >> (scale)) > (LONG)(((1U) << ((dBits)-1)) - 1)) \
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? (LONG)(((1U) << ((dBits)-1)) - 1) \
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: (((LONG)(src) >> (scale)) < ~((LONG)(((1U) << ((dBits)-1)) - 1))) \
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? ~((LONG)(((1U) << ((dBits)-1)) - 1)) \
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: ((LONG)(src) >> (scale)))
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#endif
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#ifndef SATURATE_LEFT_SHIFT
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#define SATURATE_LEFT_SHIFT(src, scale, dBits) \
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(((LONG)(src) > ((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \
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? (LONG)(((1U) << ((dBits)-1)) - 1) \
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: ((LONG)(src) < ~((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \
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? ~((LONG)(((1U) << ((dBits)-1)) - 1)) \
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: ((LONG)(src) << (scale)))
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#endif
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#ifndef SATURATE_SHIFT
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#define SATURATE_SHIFT(src, scale, dBits) \
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(((scale) < 0) ? SATURATE_LEFT_SHIFT((src), -(scale), (dBits)) \
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: SATURATE_RIGHT_SHIFT((src), (scale), (dBits)))
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#endif
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/*
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* Alternative shift and saturate left, saturates to -0.99999 instead of -1.0000
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* to avoid problems when inverting the sign of the result.
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*/
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#ifndef SATURATE_LEFT_SHIFT_ALT
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#define SATURATE_LEFT_SHIFT_ALT(src, scale, dBits) \
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(((LONG)(src) > ((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \
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? (LONG)(((1U) << ((dBits)-1)) - 1) \
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: ((LONG)(src) <= ~((LONG)(((1U) << ((dBits)-1)) - 1) >> (scale))) \
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? ~((LONG)(((1U) << ((dBits)-1)) - 2)) \
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: ((LONG)(src) << (scale)))
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#endif
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#ifndef SATURATE_RIGHT_SHIFT_ALT
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#define SATURATE_RIGHT_SHIFT_ALT(src, scale, dBits) \
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((((LONG)(src) >> (scale)) > (LONG)(((1U) << ((dBits)-1)) - 1)) \
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? (LONG)(((1U) << ((dBits)-1)) - 1) \
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: (((LONG)(src) >> (scale)) < ~((LONG)(((1U) << ((dBits)-1)) - 2))) \
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? ~((LONG)(((1U) << ((dBits)-1)) - 2)) \
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: ((LONG)(src) >> (scale)))
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#endif
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#ifndef SATURATE_INT_PCM_RIGHT_SHIFT
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#define SATURATE_INT_PCM_RIGHT_SHIFT(src, scale) \
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SATURATE_RIGHT_SHIFT(src, scale, SAMPLE_BITS)
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#endif
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#ifndef SATURATE_INT_PCM_LEFT_SHIFT
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#define SATURATE_INT_PCM_LEFT_SHIFT(src, scale) \
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SATURATE_LEFT_SHIFT(src, scale, SAMPLE_BITS)
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#endif
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#endif /* #ifndef SCALE_H */
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