1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /*************************** Fraunhofer IIS FDK Tools ********************** 85 86 Author(s): 87 Description: Scaling operations 88 89 ******************************************************************************/ 90 91 #ifndef SCALE_H 92 #define SCALE_H 93 94 #include "common_fix.h" 95 #include "genericStds.h" 96 #include "fixminmax.h" 97 98 #define SCALE_INLINE inline 99 100 101 #if defined(__arm__) /* cppp replaced: elif */ 102 #include "arm/scale.h" 103 104 #elif defined(__mips__) /* cppp replaced: elif */ 105 #include "mips/scale.h" 106 107 #endif 108 109 110 #include "../src/scale.cpp" 111 112 #ifndef FUNCTION_scaleValue 113 /*! 114 * 115 * \brief Multiply input by \f$ 2^{scalefactor} \f$ 116 * 117 * \return Scaled input 118 * 119 */ 120 #define FUNCTION_scaleValue 121 inline 122 FIXP_DBL scaleValue(const FIXP_DBL value, /*!< Value */ 123 INT scalefactor /*!< Scalefactor */ 124 ) 125 { 126 if(scalefactor > 0) 127 return (value<<scalefactor); 128 else 129 return (value>>(-scalefactor)); 130 } 131 #endif 132 133 #ifndef FUNCTION_scaleValueSaturate 134 /*! 135 * 136 * \brief Multiply input by \f$ 2^{scalefactor} \f$ 137 * \param value The value to be scaled. 138 * \param the shift amount 139 * \return \f$ value * 2^scalefactor \f$ 140 * 141 */ 142 #define FUNCTION_scaleValueSaturate 143 inline 144 FIXP_DBL scaleValueSaturate( 145 const FIXP_DBL value, 146 INT scalefactor 147 ) 148 { 149 if(scalefactor > 0) { 150 if (fNorm(value) < scalefactor && value != (FIXP_DBL)0) { 151 if (value > (FIXP_DBL)0) { 152 return (FIXP_DBL)MAXVAL_DBL; 153 } else { 154 return (FIXP_DBL)MINVAL_DBL; 155 } 156 } else { 157 return (value<<scalefactor); 158 } 159 } else { 160 if (-(DFRACT_BITS-1) > scalefactor) { 161 return (FIXP_DBL)0; 162 } else { 163 return (value>>(-scalefactor)); 164 } 165 } 166 } 167 #endif 168 169 #ifndef FUNCTION_scaleValueInPlace 170 /*! 171 * 172 * \brief Multiply input by \f$ 2^{scalefactor} \f$ in place 173 * 174 * \return void 175 * 176 */ 177 #define FUNCTION_scaleValueInPlace 178 inline 179 void scaleValueInPlace( 180 FIXP_DBL *value, /*!< Value */ 181 INT scalefactor /*!< Scalefactor */ 182 ) 183 { 184 INT newscale; 185 /* Note: The assignment inside the if conditional allows combining a load with the compare to zero (on ARM and maybe others) */ 186 if ((newscale = (scalefactor)) >= 0) { 187 *(value) <<= newscale; 188 } else { 189 *(value) >>= -newscale; 190 } 191 } 192 #endif 193 194 /*! 195 * 196 * \brief Scale input value by 2^{scale} and saturate output to 2^{dBits-1} 197 * \return scaled and saturated value 198 * 199 * This macro scales src value right or left and applies saturation to (2^dBits)-1 200 * maxima output. 201 */ 202 203 #ifndef SATURATE_RIGHT_SHIFT 204 #define SATURATE_RIGHT_SHIFT(src, scale, dBits) \ 205 ( (((LONG)(src)>>(scale)) > (LONG)(((1U)<<((dBits)-1))-1)) ? (LONG)(((1U)<<((dBits)-1))-1) \ 206 : (((LONG)(src)>>(scale)) < ~((LONG)(((1U)<<((dBits)-1))-1))) ? ~((LONG)(((1U)<<((dBits)-1))-1)) \ 207 : ((LONG)(src) >> (scale)) ) 208 #endif 209 210 #ifndef SATURATE_LEFT_SHIFT 211 #define SATURATE_LEFT_SHIFT(src, scale, dBits) \ 212 ( ((LONG)(src) > ((LONG)(((1U)<<((dBits)-1))-1)>>(scale))) ? (LONG)(((1U)<<((dBits)-1))-1) \ 213 : ((LONG)(src) < ~((LONG)(((1U)<<((dBits)-1))-1)>>(scale))) ? ~((LONG)(((1U)<<((dBits)-1))-1)) \ 214 : ((LONG)(src) << (scale)) ) 215 #endif 216 217 #ifndef SATURATE_SHIFT 218 #define SATURATE_SHIFT(src, scale, dBits) \ 219 ( ((scale) < 0) \ 220 ? SATURATE_LEFT_SHIFT((src), -(scale), (dBits)) \ 221 : SATURATE_RIGHT_SHIFT((src), (scale), (dBits)) ) 222 #endif 223 224 /* 225 * Alternative shift and saturate left, saturates to -0.99999 instead of -1.0000 226 * to avoid problems when inverting the sign of the result. 227 */ 228 #ifndef SATURATE_LEFT_SHIFT_ALT 229 #define SATURATE_LEFT_SHIFT_ALT(src, scale, dBits) \ 230 ( ((LONG)(src) > ((LONG)(((1U)<<((dBits)-1))-1)>>(scale))) ? (LONG)(((1U)<<((dBits)-1))-1) \ 231 : ((LONG)(src) < ~((LONG)(((1U)<<((dBits)-1))-2)>>(scale))) ? ~((LONG)(((1U)<<((dBits)-1))-2)) \ 232 : ((LONG)(src) << (scale)) ) 233 #endif 234 235 #ifndef SATURATE_RIGHT_SHIFT_ALT 236 #define SATURATE_RIGHT_SHIFT_ALT(src, scale, dBits) \ 237 ( (((LONG)(src)>>(scale)) > (LONG)(((1U)<<((dBits)-1))-1)) ? (LONG)(((1U)<<((dBits)-1))-1) \ 238 : (((LONG)(src)>>(scale)) < ~((LONG)(((1U)<<((dBits)-1))-2))) ? ~((LONG)(((1U)<<((dBits)-1))-2)) \ 239 : ((LONG)(src) >> (scale)) ) 240 #endif 241 242 #ifndef SATURATE_INT_PCM_RIGHT_SHIFT 243 #define SATURATE_INT_PCM_RIGHT_SHIFT(src, scale) SATURATE_RIGHT_SHIFT(src, scale, SAMPLE_BITS) 244 #endif 245 246 #ifndef SATURATE_INT_PCM_LEFT_SHIFT 247 #define SATURATE_INT_PCM_LEFT_SHIFT(src, scale) SATURATE_LEFT_SHIFT(src, scale, SAMPLE_BITS) 248 #endif 249 250 #endif /* #ifndef SCALE_H */ 251
