251 lines
9.4 KiB
C
251 lines
9.4 KiB
C
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android
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<EFBFBD> Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F<EFBFBD>rderung der angewandten Forschung e.V.
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All rights reserved.
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1. INTRODUCTION
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The Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on 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 general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications 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, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of 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 from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK 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 limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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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 holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and 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, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, 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 this software, even if
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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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/*************************** Fraunhofer IIS FDK Tools **********************
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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 inline
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#if defined(__arm__) /* cppp replaced: elif */
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#include "arm/scale.h"
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#elif defined(__mips__) /* cppp replaced: elif */
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#include "mips/scale.h"
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#endif
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#include "../src/scale.cpp"
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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
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FIXP_DBL scaleValue(const FIXP_DBL value, /*!< Value */
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INT scalefactor /*!< Scalefactor */
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)
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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
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FIXP_DBL scaleValueSaturate(
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const FIXP_DBL value,
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INT scalefactor
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)
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{
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if(scalefactor > 0) {
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if (fNorm(value) < scalefactor && value != (FIXP_DBL)0) {
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if (value > (FIXP_DBL)0) {
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return (FIXP_DBL)MAXVAL_DBL;
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} else {
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return (FIXP_DBL)MINVAL_DBL;
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}
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} else {
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return (value<<scalefactor);
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}
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} else {
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if (-(DFRACT_BITS-1) > scalefactor) {
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return (FIXP_DBL)0;
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} else {
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return (value>>(-scalefactor));
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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
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void scaleValueInPlace(
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FIXP_DBL *value, /*!< Value */
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INT scalefactor /*!< Scalefactor */
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)
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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 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 (2^dBits)-1
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* 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)) ? (LONG)(((1U)<<((dBits)-1))-1) \
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: (((LONG)(src)>>(scale)) < ~((LONG)(((1U)<<((dBits)-1))-1))) ? ~((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))) ? (LONG)(((1U)<<((dBits)-1))-1) \
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: ((LONG)(src) < ~((LONG)(((1U)<<((dBits)-1))-1)>>(scale))) ? ~((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) \
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? 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))) ? (LONG)(((1U)<<((dBits)-1))-1) \
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: ((LONG)(src) < ~((LONG)(((1U)<<((dBits)-1))-2)>>(scale))) ? ~((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)) ? (LONG)(((1U)<<((dBits)-1))-1) \
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: (((LONG)(src)>>(scale)) < ~((LONG)(((1U)<<((dBits)-1))-2))) ? ~((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) 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) SATURATE_LEFT_SHIFT(src, scale, SAMPLE_BITS)
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#endif
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#endif /* #ifndef SCALE_H */
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