1/* ----------------------------------------------------------------------------- 2Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten 5Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10scheme for digital audio. This FDK AAC Codec software is intended to be used on 11a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14general perceptual audio codecs. AAC-ELD is considered the best-performing 15full-bandwidth communications codec by independent studies and is widely 16deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17specifications. 18 19Patent licenses for necessary patent claims for the FDK AAC Codec (including 20those of Fraunhofer) may be obtained through Via Licensing 21(www.vialicensing.com) or through the respective patent owners individually for 22the purpose of encoding or decoding bit streams in products that are compliant 23with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24Android devices already license these patent claims through Via Licensing or 25directly from the patent owners, and therefore FDK AAC Codec software may 26already be covered under those patent licenses when it is used for those 27licensed purposes only. 28 29Commercially-licensed AAC software libraries, including floating-point versions 30with enhanced sound quality, are also available from Fraunhofer. Users are 31encouraged to check the Fraunhofer website for additional applications 32information and documentation. 33 342. COPYRIGHT LICENSE 35 36Redistribution and use in source and binary forms, with or without modification, 37are permitted without payment of copyright license fees provided that you 38satisfy the following conditions: 39 40You must retain the complete text of this software license in redistributions of 41the FDK AAC Codec or your modifications thereto in source code form. 42 43You must retain the complete text of this software license in the documentation 44and/or other materials provided with redistributions of the FDK AAC Codec or 45your modifications thereto in binary form. You must make available free of 46charge copies of the complete source code of the FDK AAC Codec and your 47modifications thereto to recipients of copies in binary form. 48 49The name of Fraunhofer may not be used to endorse or promote products derived 50from this library without prior written permission. 51 52You may not charge copyright license fees for anyone to use, copy or distribute 53the FDK AAC Codec software or your modifications thereto. 54 55Your modified versions of the FDK AAC Codec must carry prominent notices stating 56that you changed the software and the date of any change. For modified versions 57of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59AAC Codec Library for Android." 60 613. NO PATENT LICENSE 62 63NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65Fraunhofer provides no warranty of patent non-infringement with respect to this 66software. 67 68You may use this FDK AAC Codec software or modifications thereto only for 69purposes that are authorized by appropriate patent licenses. 70 714. DISCLAIMER 72 73This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75including but not limited to the implied warranties of merchantability and 76fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78or consequential damages, including but not limited to procurement of substitute 79goods or services; loss of use, data, or profits, or business interruption, 80however caused and on any theory of liability, whether in contract, strict 81liability, or tort (including negligence), arising in any way out of the use of 82this software, even if advised of the possibility of such damage. 83 845. CONTACT INFORMATION 85 86Fraunhofer Institute for Integrated Circuits IIS 87Attention: Audio and Multimedia Departments - FDK AAC LL 88Am Wolfsmantel 33 8991058 Erlangen, Germany 90 91www.iis.fraunhofer.de/amm 92amm-info@iis.fraunhofer.de 93----------------------------------------------------------------------------- */ 94 95/******************* Library for basic calculation routines ******************** 96 97 Author(s): M. Lohwasser, M. Gayer 98 99 Description: Flexible fixpoint library configuration 100 101*******************************************************************************/ 102 103#ifndef COMMON_FIX_H 104#define COMMON_FIX_H 105 106#include "FDK_archdef.h" 107#include "machine_type.h" 108 109/* ***** Start of former fix.h ****** */ 110 111/* Define bit sizes of integer fixpoint fractional data types */ 112#define FRACT_BITS 16 /* single precision */ 113#define DFRACT_BITS 32 /* double precision */ 114#define ACCU_BITS 40 /* double precision plus overflow */ 115 116/* Fixpoint equivalent type fot PCM audio time domain data. */ 117#if defined(SAMPLE_BITS) 118#if (SAMPLE_BITS == DFRACT_BITS) 119#define FIXP_PCM FIXP_DBL 120#define MAXVAL_FIXP_PCM MAXVAL_DBL 121#define MINVAL_FIXP_PCM MINVAL_DBL 122#define FX_PCM2FX_DBL(x) ((FIXP_DBL)(x)) 123#define FX_DBL2FX_PCM(x) ((INT_PCM)(x)) 124#elif (SAMPLE_BITS == FRACT_BITS) 125#define FIXP_PCM FIXP_SGL 126#define MAXVAL_FIXP_PCM MAXVAL_SGL 127#define MINVAL_FIXP_PCM MINVAL_SGL 128#define FX_PCM2FX_DBL(x) FX_SGL2FX_DBL((FIXP_SGL)(x)) 129#define FX_DBL2FX_PCM(x) FX_DBL2FX_SGL(x) 130#else 131#error SAMPLE_BITS different from FRACT_BITS or DFRACT_BITS not implemented! 132#endif 133#endif 134 135/* ****** End of former fix.h ****** */ 136 137#define SGL_MASK ((1UL << FRACT_BITS) - 1) /* 16bit: (2^16)-1 = 0xFFFF */ 138 139#define MAX_SHIFT_SGL \ 140 (FRACT_BITS - 1) /* maximum possible shift for FIXP_SGL values */ 141#define MAX_SHIFT_DBL \ 142 (DFRACT_BITS - 1) /* maximum possible shift for FIXP_DBL values */ 143 144/* Scale factor from/to float/fixpoint values. DO NOT USE THESE VALUES AS 145 * SATURATION LIMITS !! */ 146#define FRACT_FIX_SCALE ((INT64(1) << (FRACT_BITS - 1))) 147#define DFRACT_FIX_SCALE ((INT64(1) << (DFRACT_BITS - 1))) 148 149/* Max and Min values for saturation purposes. DO NOT USE THESE VALUES AS SCALE 150 * VALUES !! */ 151#define MAXVAL_SGL \ 152 ((signed)0x00007FFF) /* this has to be synchronized to FRACT_BITS */ 153#define MINVAL_SGL \ 154 ((signed)0xFFFF8000) /* this has to be synchronized to FRACT_BITS */ 155#define MAXVAL_DBL \ 156 ((signed)0x7FFFFFFF) /* this has to be synchronized to DFRACT_BITS */ 157#define MINVAL_DBL \ 158 ((signed)0x80000000) /* this has to be synchronized to DFRACT_BITS */ 159 160#define FX_DBL2FXCONST_SGL(val) \ 161 ((((((val) >> (DFRACT_BITS - FRACT_BITS - 1)) + 1) > \ 162 (((LONG)1 << FRACT_BITS) - 1)) && \ 163 ((LONG)(val) > 0)) \ 164 ? (FIXP_SGL)(SHORT)(((LONG)1 << (FRACT_BITS - 1)) - 1) \ 165 : (FIXP_SGL)(SHORT)((((val) >> (DFRACT_BITS - FRACT_BITS - 1)) + 1) >> \ 166 1)) 167 168#define shouldBeUnion union /* unions are possible */ 169 170typedef SHORT FIXP_SGL; 171typedef LONG FIXP_DBL; 172 173/* macros for compile-time conversion of constant float values to fixedpoint */ 174#define FL2FXCONST_SPC FL2FXCONST_DBL 175 176#define MINVAL_DBL_CONST MINVAL_DBL 177#define MINVAL_SGL_CONST MINVAL_SGL 178 179#define FL2FXCONST_SGL(val) \ 180 (FIXP_SGL)( \ 181 ((val) >= 0) \ 182 ? ((((double)(val) * (FRACT_FIX_SCALE) + 0.5) >= \ 183 (double)(MAXVAL_SGL)) \ 184 ? (SHORT)(MAXVAL_SGL) \ 185 : (SHORT)((double)(val) * (double)(FRACT_FIX_SCALE) + 0.5)) \ 186 : ((((double)(val) * (FRACT_FIX_SCALE)-0.5) <= \ 187 (double)(MINVAL_SGL_CONST)) \ 188 ? (SHORT)(MINVAL_SGL_CONST) \ 189 : (SHORT)((double)(val) * (double)(FRACT_FIX_SCALE)-0.5))) 190 191#define FL2FXCONST_DBL(val) \ 192 (FIXP_DBL)( \ 193 ((val) >= 0) \ 194 ? ((((double)(val) * (DFRACT_FIX_SCALE) + 0.5) >= \ 195 (double)(MAXVAL_DBL)) \ 196 ? (LONG)(MAXVAL_DBL) \ 197 : (LONG)((double)(val) * (double)(DFRACT_FIX_SCALE) + 0.5)) \ 198 : ((((double)(val) * (DFRACT_FIX_SCALE)-0.5) <= \ 199 (double)(MINVAL_DBL_CONST)) \ 200 ? (LONG)(MINVAL_DBL_CONST) \ 201 : (LONG)((double)(val) * (double)(DFRACT_FIX_SCALE)-0.5))) 202 203/* macros for runtime conversion of float values to integer fixedpoint. NO 204 * OVERFLOW CHECK!!! */ 205#define FL2FX_SPC FL2FX_DBL 206#define FL2FX_SGL(val) \ 207 ((val) > 0.0f ? (SHORT)((val) * (float)(FRACT_FIX_SCALE) + 0.5f) \ 208 : (SHORT)((val) * (float)(FRACT_FIX_SCALE)-0.5f)) 209#define FL2FX_DBL(val) \ 210 ((val) > 0.0f ? (LONG)((val) * (float)(DFRACT_FIX_SCALE) + 0.5f) \ 211 : (LONG)((val) * (float)(DFRACT_FIX_SCALE)-0.5f)) 212 213/* macros for runtime conversion of fixedpoint values to other fixedpoint. NO 214 * ROUNDING!!! */ 215#define FX_ACC2FX_SGL(val) ((FIXP_SGL)((val) >> (ACCU_BITS - FRACT_BITS))) 216#define FX_ACC2FX_DBL(val) ((FIXP_DBL)((val) >> (ACCU_BITS - DFRACT_BITS))) 217#define FX_SGL2FX_ACC(val) ((FIXP_ACC)((LONG)(val) << (ACCU_BITS - FRACT_BITS))) 218#define FX_SGL2FX_DBL(val) \ 219 ((FIXP_DBL)((LONG)(val) << (DFRACT_BITS - FRACT_BITS))) 220#define FX_DBL2FX_SGL(val) ((FIXP_SGL)((val) >> (DFRACT_BITS - FRACT_BITS))) 221 222/* ############################################################# */ 223 224/* macros for runtime conversion of integer fixedpoint values to float. */ 225 226/* #define FX_DBL2FL(val) ((float)(pow(2.,-31.)*(float)val)) */ /* version #1 227 */ 228#define FX_DBL2FL(val) \ 229 ((float)((double)(val) / (double)DFRACT_FIX_SCALE)) /* version #2 - \ 230 identical to class \ 231 dfract cast from \ 232 dfract to float */ 233#define FX_DBL2DOUBLE(val) (((double)(val) / (double)DFRACT_FIX_SCALE)) 234 235/* ############################################################# */ 236#include "fixmul.h" 237 238FDK_INLINE LONG fMult(SHORT a, SHORT b) { return fixmul_SS(a, b); } 239FDK_INLINE LONG fMult(SHORT a, LONG b) { return fixmul_SD(a, b); } 240FDK_INLINE LONG fMult(LONG a, SHORT b) { return fixmul_DS(a, b); } 241FDK_INLINE LONG fMult(LONG a, LONG b) { return fixmul_DD(a, b); } 242FDK_INLINE LONG fPow2(LONG a) { return fixpow2_D(a); } 243FDK_INLINE LONG fPow2(SHORT a) { return fixpow2_S(a); } 244 245FDK_INLINE LONG fMultDiv2(SHORT a, SHORT b) { return fixmuldiv2_SS(a, b); } 246FDK_INLINE LONG fMultDiv2(SHORT a, LONG b) { return fixmuldiv2_SD(a, b); } 247FDK_INLINE LONG fMultDiv2(LONG a, SHORT b) { return fixmuldiv2_DS(a, b); } 248FDK_INLINE LONG fMultDiv2(LONG a, LONG b) { return fixmuldiv2_DD(a, b); } 249FDK_INLINE LONG fPow2Div2(LONG a) { return fixpow2div2_D(a); } 250FDK_INLINE LONG fPow2Div2(SHORT a) { return fixpow2div2_S(a); } 251 252FDK_INLINE LONG fMultDiv2BitExact(LONG a, LONG b) { 253 return fixmuldiv2BitExact_DD(a, b); 254} 255FDK_INLINE LONG fMultDiv2BitExact(SHORT a, LONG b) { 256 return fixmuldiv2BitExact_SD(a, b); 257} 258FDK_INLINE LONG fMultDiv2BitExact(LONG a, SHORT b) { 259 return fixmuldiv2BitExact_DS(a, b); 260} 261FDK_INLINE LONG fMultBitExact(LONG a, LONG b) { 262 return fixmulBitExact_DD(a, b); 263} 264FDK_INLINE LONG fMultBitExact(SHORT a, LONG b) { 265 return fixmulBitExact_SD(a, b); 266} 267FDK_INLINE LONG fMultBitExact(LONG a, SHORT b) { 268 return fixmulBitExact_DS(a, b); 269} 270 271/* ******************************************************************************** 272 */ 273#include "abs.h" 274 275FDK_INLINE FIXP_DBL fAbs(FIXP_DBL x) { return fixabs_D(x); } 276FDK_INLINE FIXP_SGL fAbs(FIXP_SGL x) { return fixabs_S(x); } 277 278#if !defined(__LP64__) 279FDK_INLINE INT fAbs(INT x) { return fixabs_I(x); } 280#endif 281 282 /* ******************************************************************************** 283 */ 284 285#include "clz.h" 286 287FDK_INLINE INT fNormz(INT64 x) { 288 INT clz = fixnormz_D((INT)(x >> 32)); 289 if (clz == 32) clz += fixnormz_D((INT)x); 290 return clz; 291} 292FDK_INLINE INT fNormz(FIXP_DBL x) { return fixnormz_D(x); } 293FDK_INLINE INT fNormz(FIXP_SGL x) { return fixnormz_S(x); } 294FDK_INLINE INT fNorm(FIXP_DBL x) { return fixnorm_D(x); } 295FDK_INLINE INT fNorm(FIXP_SGL x) { return fixnorm_S(x); } 296 297 /* ******************************************************************************** 298 */ 299 /* ******************************************************************************** 300 */ 301 /* ******************************************************************************** 302 */ 303 304#include "clz.h" 305#define fixp_abs(x) fAbs(x) 306#define fixMin(a, b) fMin(a, b) 307#define fixMax(a, b) fMax(a, b) 308#define CntLeadingZeros(x) fixnormz_D(x) 309#define CountLeadingBits(x) fixnorm_D(x) 310 311#include "fixmadd.h" 312 313/* y = (x+0.5*a*b) */ 314FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 315 return fixmadddiv2_DD(x, a, b); 316} 317FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 318 return fixmadddiv2_SD(x, a, b); 319} 320FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 321 return fixmadddiv2_DS(x, a, b); 322} 323FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { 324 return fixmadddiv2_SS(x, a, b); 325} 326 327FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_DBL a) { 328 return fixpadddiv2_D(x, a); 329} 330FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_SGL a) { 331 return fixpadddiv2_S(x, a); 332} 333 334/* y = 2*(x+0.5*a*b) = (2x+a*b) */ 335FDK_INLINE FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 336 return fixmadd_DD(x, a, b); 337} 338inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 339 return fixmadd_SD(x, a, b); 340} 341inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 342 return fixmadd_DS(x, a, b); 343} 344inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { 345 return fixmadd_SS(x, a, b); 346} 347 348inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_DBL a) { return fixpadd_D(x, a); } 349inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_SGL a) { return fixpadd_S(x, a); } 350 351/* y = (x-0.5*a*b) */ 352inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 353 return fixmsubdiv2_DD(x, a, b); 354} 355inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 356 return fixmsubdiv2_SD(x, a, b); 357} 358inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 359 return fixmsubdiv2_DS(x, a, b); 360} 361inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { 362 return fixmsubdiv2_SS(x, a, b); 363} 364 365/* y = 2*(x-0.5*a*b) = (2*x-a*b) */ 366FDK_INLINE FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 367 return fixmsub_DD(x, a, b); 368} 369inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 370 return fixmsub_SD(x, a, b); 371} 372inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 373 return fixmsub_DS(x, a, b); 374} 375inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { 376 return fixmsub_SS(x, a, b); 377} 378 379FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 380 return fixmadddiv2BitExact_DD(x, a, b); 381} 382FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 383 return fixmadddiv2BitExact_SD(x, a, b); 384} 385FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 386 return fixmadddiv2BitExact_DS(x, a, b); 387} 388FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { 389 return fixmsubdiv2BitExact_DD(x, a, b); 390} 391FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { 392 return fixmsubdiv2BitExact_SD(x, a, b); 393} 394FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { 395 return fixmsubdiv2BitExact_DS(x, a, b); 396} 397 398#include "fixminmax.h" 399 400FDK_INLINE FIXP_DBL fMin(FIXP_DBL a, FIXP_DBL b) { return fixmin_D(a, b); } 401FDK_INLINE FIXP_DBL fMax(FIXP_DBL a, FIXP_DBL b) { return fixmax_D(a, b); } 402 403FDK_INLINE FIXP_SGL fMin(FIXP_SGL a, FIXP_SGL b) { return fixmin_S(a, b); } 404FDK_INLINE FIXP_SGL fMax(FIXP_SGL a, FIXP_SGL b) { return fixmax_S(a, b); } 405 406#if !defined(__LP64__) 407FDK_INLINE INT fMax(INT a, INT b) { return fixmax_I(a, b); } 408FDK_INLINE INT fMin(INT a, INT b) { return fixmin_I(a, b); } 409#if !defined(_MSC_VER) && defined(__x86_64__) 410FDK_INLINE SHORT fMax(SHORT a, SHORT b) { return fixmax_S(a, b); } 411FDK_INLINE SHORT fMin(SHORT a, SHORT b) { return fixmin_S(a, b); } 412#endif 413#endif 414 415inline UINT fMax(UINT a, UINT b) { return fixmax_UI(a, b); } 416inline UINT fMin(UINT a, UINT b) { return fixmin_UI(a, b); } 417 418inline UCHAR fMax(UCHAR a, UCHAR b) { 419 return (UCHAR)fixmax_UI((UINT)a, (UINT)b); 420} 421inline UCHAR fMin(UCHAR a, UCHAR b) { 422 return (UCHAR)fixmin_UI((UINT)a, (UINT)b); 423} 424 425/* Complex data types */ 426typedef shouldBeUnion { 427 /* vector representation for arithmetic */ 428 struct { 429 FIXP_SGL re; 430 FIXP_SGL im; 431 } v; 432 /* word representation for memory move */ 433 LONG w; 434} 435FIXP_SPK; 436 437typedef shouldBeUnion { 438 /* vector representation for arithmetic */ 439 struct { 440 FIXP_DBL re; 441 FIXP_DBL im; 442 } v; 443 /* word representation for memory move */ 444 INT64 w; 445} 446FIXP_DPK; 447 448#include "fixmul.h" 449#include "fixmadd.h" 450#include "cplx_mul.h" 451#include "fixpoint_math.h" 452 453#endif 454