libFDK/include/fixmul.h

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   6   All rights reserved.
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   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.
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  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
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  29 2.    COPYRIGHT LICENSE
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  38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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  40 modifications thereto to recipients of copies in binary form.
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  56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
  57 respect to this software.
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  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
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  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@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /***************************  Fraunhofer IIS FDK Tools  **********************
  85
  86    Author(s):   Stefan Gewinner
  87    Description: fixed point multiplication
  88
  89 ******************************************************************************/
  90
  91 #if !defined(__FIXMUL_H__)
  92 #define __FIXMUL_H__
  93
  94 #include "FDK_archdef.h"
  95 #include "machine_type.h"
  96
  97
  98 #if defined(__arm__)
  99 #include "arm/fixmul_arm.h"
 100
 101 #elif defined(__mips__) /* cppp replaced: elif */
 102 #include "mips/fixmul_mips.h"
 103
 104 #elif defined(__x86__)  /* cppp replaced: elif */
 105 #include "x86/fixmul_x86.h"
 106
 107 #endif /* all cores */
 108
 109 /*************************************************************************
 110  *************************************************************************
 111     Software fallbacks for missing functions
 112 **************************************************************************
 113 **************************************************************************/
 114
 115 #if !defined(FUNCTION_fixmuldiv2_DD)
 116 #define FUNCTION_fixmuldiv2_DD
 117 #if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
 118 #pragma message ("Extremely slow implementation of fixmuldiv2_DD !!")
 119 #else
 120 #warning Extremely slow implementation of fixmuldiv2_DD !!
 121 #endif
 122 inline LONG fixmuldiv2_DD (const LONG a, const LONG b)
 123 {
 124   return (LONG) ((((INT64)a) * b) >> 32) ;
 125 }
 126 #endif
 127
 128 #if !defined(FUNCTION_fixmuldiv2BitExact_DD)
 129 #define FUNCTION_fixmuldiv2BitExact_DD
 130 #if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
 131 #pragma message ("Extremely slow implementation of fixmuldiv2BitExact_DD !!")
 132 #else
 133 #warning Extremely slow implementation of fixmuldiv2BitExact_DD !!
 134 #endif
 135 inline LONG fixmuldiv2BitExact_DD (const LONG a, const LONG b)
 136 {
 137   return (LONG) ((((INT64)a) * b) >> 32) ;
 138 }
 139 #endif
 140
 141 #if !defined(FUNCTION_fixmul_DD)
 142 #define FUNCTION_fixmul_DD
 143 inline LONG fixmul_DD (const LONG a, const LONG b)
 144   { return fixmuldiv2_DD (a, b) << 1 ; }
 145 #endif
 146
 147 #if !defined(FUNCTION_fixmulBitExact_DD)
 148 #define FUNCTION_fixmulBitExact_DD
 149 #if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__) || defined(__XTENSA__)
 150 #pragma message ("Extremely slow implementation of fixmulBitExact_DD !!")
 151 #else
 152 #warning Extremely slow implementation of fixmulBitExact_DD !!
 153 #endif
 154 inline LONG fixmulBitExact_DD (const LONG a, const LONG b)
 155 {
 156   return ( (LONG) ((((INT64)a) * b) >> 32) ) << 1;
 157 }
 158 #endif
 159
 160 #if !defined(FUNCTION_fixmuldiv2_SS)
 161 #define FUNCTION_fixmuldiv2_SS
 162 inline LONG fixmuldiv2_SS (const SHORT a, const SHORT b)
 163   { return ((LONG)a*b); }
 164 #endif
 165
 166 #if !defined(FUNCTION_fixmul_SS)
 167 #define FUNCTION_fixmul_SS
 168 inline LONG fixmul_SS (const SHORT a, const SHORT b)
 169   { return (a*b) <<1; }
 170 #endif
 171
 172 #if !defined(FUNCTION_fixmuldiv2_SD)
 173 #define FUNCTION_fixmuldiv2_SD
 174 inline LONG fixmuldiv2_SD (const SHORT a, const LONG b)
 175 #ifdef FUNCTION_fixmuldiv2_DS
 176   { return fixmuldiv2_DS(b, a); }
 177 #else
 178   { return fixmuldiv2_DD(FX_SGL2FX_DBL(a), b); }
 179 #endif
 180 #endif
 181
 182 #if !defined(FUNCTION_fixmuldiv2_DS)
 183 #define FUNCTION_fixmuldiv2_DS
 184 inline LONG fixmuldiv2_DS (const LONG a, const SHORT b)
 185 #ifdef FUNCTION_fixmuldiv2_SD
 186   { return fixmuldiv2_SD(b, a); }
 187 #else
 188   { return fixmuldiv2_DD(a, FX_SGL2FX_DBL(b)); }
 189 #endif
 190 #endif
 191
 192 #if !defined(FUNCTION_fixmuldiv2BitExact_SD)
 193 #define FUNCTION_fixmuldiv2BitExact_SD
 194 inline LONG fixmuldiv2BitExact_SD (const SHORT a, const LONG b)
 195 #ifdef FUNCTION_fixmuldiv2BitExact_DS
 196   { return fixmuldiv2BitExact_DS(b, a); }
 197 #else
 198   { return (LONG) ((((INT64)a) * b) >> 16) ; }
 199 #endif
 200 #endif
 201
 202 #if !defined(FUNCTION_fixmuldiv2BitExact_DS)
 203 #define FUNCTION_fixmuldiv2BitExact_DS
 204 inline LONG fixmuldiv2BitExact_DS (const LONG a, const SHORT b)
 205 #ifdef FUNCTION_fixmuldiv2BitExact_SD
 206   { return fixmuldiv2BitExact_SD(b, a); }
 207 #else
 208   { return (LONG) ((((INT64)a) * b) >> 16) ; }
 209 #endif
 210 #endif
 211
 212 #if !defined(FUNCTION_fixmul_SD)
 213 #define FUNCTION_fixmul_SD
 214 inline LONG fixmul_SD (const SHORT a, const LONG b) {
 215 #ifdef FUNCTION_fixmul_DS
 216   return fixmul_SD(b, a);
 217 #else
 218   return fixmuldiv2_SD (a, b) << 1 ;
 219 #endif
 220 }
 221 #endif
 222
 223 #if !defined(FUNCTION_fixmul_DS)
 224 #define FUNCTION_fixmul_DS
 225 inline LONG fixmul_DS (const LONG a, const SHORT b) {
 226 #ifdef FUNCTION_fixmul_SD
 227   return fixmul_SD(b, a);
 228 #else
 229   return fixmuldiv2_DS(a, b) << 1 ;
 230 #endif
 231 }
 232 #endif
 233
 234 #if !defined(FUNCTION_fixmulBitExact_SD)
 235 #define FUNCTION_fixmulBitExact_SD
 236 inline LONG fixmulBitExact_SD (const SHORT a, const LONG b)
 237 #ifdef FUNCTION_fixmulBitExact_DS
 238   { return fixmulBitExact_DS(b, a); }
 239 #else
 240   { return (LONG) (((((INT64)a) * b) >> 16) << 1); }
 241 #endif
 242 #endif
 243
 244 #if !defined(FUNCTION_fixmulBitExact_DS)
 245 #define FUNCTION_fixmulBitExact_DS
 246 inline LONG fixmulBitExact_DS (const LONG a, const SHORT b)
 247 #ifdef FUNCTION_fixmulBitExact_SD
 248   { return fixmulBitExact_SD(b, a); }
 249 #else
 250   { return (LONG) (((((INT64)a) * b) >> 16) << 1); }
 251 #endif
 252 #endif
 253
 254
 255 #if !defined(FUNCTION_fixpow2div2_D)
 256 #ifdef ARCH_WA_16BITMULT
 257 #error Fallback for fixpow2div2_D is not 16 bit safe !
 258 #endif
 259 #define FUNCTION_fixpow2div2_D
 260 inline LONG fixpow2div2_D (const LONG a)
 261   { return fixmuldiv2_DD(a, a); }
 262 #endif
 263
 264 #if !defined(FUNCTION_fixpow2_D)
 265 #ifdef ARCH_WA_16BITMULT
 266 #error Fallback for fixpow2_D is not 16 bit safe !
 267 #endif
 268 #define FUNCTION_fixpow2_D
 269 inline LONG fixpow2_D (const LONG a)
 270   { return fixpow2div2_D(a)<<1; }
 271 #endif
 272
 273 #if !defined(FUNCTION_fixpow2div2_S)
 274 #define FUNCTION_fixpow2div2_S
 275 inline LONG fixpow2div2_S (const SHORT a)
 276   { return fixmuldiv2_SS(a, a); }
 277 #endif
 278
 279 #if !defined(FUNCTION_fixpow2_S)
 280 #define FUNCTION_fixpow2_S
 281 inline LONG fixpow2_S (const SHORT a)
 282   { return fixpow2div2_S(a)<<1; }
 283 #endif
 284
 285
 286 #endif /* __FIXMUL_H__ */