| /* ----------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten |
| Forschung e.V. All rights reserved. |
| |
| 1. INTRODUCTION |
| The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software |
| that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding |
| scheme for digital audio. This FDK AAC Codec software is intended to be used on |
| a wide variety of Android devices. |
| |
| AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient |
| general perceptual audio codecs. AAC-ELD is considered the best-performing |
| full-bandwidth communications codec by independent studies and is widely |
| deployed. AAC has been standardized by ISO and IEC as part of the MPEG |
| specifications. |
| |
| Patent licenses for necessary patent claims for the FDK AAC Codec (including |
| those of Fraunhofer) may be obtained through Via Licensing |
| (www.vialicensing.com) or through the respective patent owners individually for |
| the purpose of encoding or decoding bit streams in products that are compliant |
| with the ISO/IEC MPEG audio standards. Please note that most manufacturers of |
| Android devices already license these patent claims through Via Licensing or |
| directly from the patent owners, and therefore FDK AAC Codec software may |
| already be covered under those patent licenses when it is used for those |
| licensed purposes only. |
| |
| Commercially-licensed AAC software libraries, including floating-point versions |
| with enhanced sound quality, are also available from Fraunhofer. Users are |
| encouraged to check the Fraunhofer website for additional applications |
| information and documentation. |
| |
| 2. COPYRIGHT LICENSE |
| |
| Redistribution and use in source and binary forms, with or without modification, |
| are permitted without payment of copyright license fees provided that you |
| satisfy the following conditions: |
| |
| You must retain the complete text of this software license in redistributions of |
| the FDK AAC Codec or your modifications thereto in source code form. |
| |
| You must retain the complete text of this software license in the documentation |
| and/or other materials provided with redistributions of the FDK AAC Codec or |
| your modifications thereto in binary form. You must make available free of |
| charge copies of the complete source code of the FDK AAC Codec and your |
| modifications thereto to recipients of copies in binary form. |
| |
| The name of Fraunhofer may not be used to endorse or promote products derived |
| from this library without prior written permission. |
| |
| You may not charge copyright license fees for anyone to use, copy or distribute |
| the FDK AAC Codec software or your modifications thereto. |
| |
| Your modified versions of the FDK AAC Codec must carry prominent notices stating |
| that you changed the software and the date of any change. For modified versions |
| of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" |
| must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK |
| AAC Codec Library for Android." |
| |
| 3. NO PATENT LICENSE |
| |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without |
| limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. |
| Fraunhofer provides no warranty of patent non-infringement with respect to this |
| software. |
| |
| You may use this FDK AAC Codec software or modifications thereto only for |
| purposes that are authorized by appropriate patent licenses. |
| |
| 4. DISCLAIMER |
| |
| This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright |
| holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, |
| including but not limited to the implied warranties of merchantability and |
| fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, |
| or consequential damages, including but not limited to procurement of substitute |
| goods or services; loss of use, data, or profits, or business interruption, |
| however caused and on any theory of liability, whether in contract, strict |
| liability, or tort (including negligence), arising in any way out of the use of |
| this software, even if advised of the possibility of such damage. |
| |
| 5. CONTACT INFORMATION |
| |
| Fraunhofer Institute for Integrated Circuits IIS |
| Attention: Audio and Multimedia Departments - FDK AAC LL |
| Am Wolfsmantel 33 |
| 91058 Erlangen, Germany |
| |
| www.iis.fraunhofer.de/amm |
| amm-info@iis.fraunhofer.de |
| ----------------------------------------------------------------------------- */ |
| |
| /******************* Library for basic calculation routines ******************** |
| |
| Author(s): M. Lohwasser, M. Gayer |
| |
| Description: Flexible fixpoint library configuration |
| |
| *******************************************************************************/ |
| |
| #ifndef COMMON_FIX_H |
| #define COMMON_FIX_H |
| |
| #include "FDK_archdef.h" |
| #include "machine_type.h" |
| |
| /* ***** Start of former fix.h ****** */ |
| |
| /* Define bit sizes of integer fixpoint fractional data types */ |
| #define FRACT_BITS 16 /* single precision */ |
| #define DFRACT_BITS 32 /* double precision */ |
| #define ACCU_BITS 40 /* double precision plus overflow */ |
| |
| /* Fixpoint equivalent type fot PCM audio time domain data. */ |
| #if defined(SAMPLE_BITS) |
| #if (SAMPLE_BITS == DFRACT_BITS) |
| #define FIXP_PCM FIXP_DBL |
| #define MAXVAL_FIXP_PCM MAXVAL_DBL |
| #define MINVAL_FIXP_PCM MINVAL_DBL |
| #define FX_PCM2FX_DBL(x) ((FIXP_DBL)(x)) |
| #define FX_DBL2FX_PCM(x) ((INT_PCM)(x)) |
| #elif (SAMPLE_BITS == FRACT_BITS) |
| #define FIXP_PCM FIXP_SGL |
| #define MAXVAL_FIXP_PCM MAXVAL_SGL |
| #define MINVAL_FIXP_PCM MINVAL_SGL |
| #define FX_PCM2FX_DBL(x) FX_SGL2FX_DBL((FIXP_SGL)(x)) |
| #define FX_DBL2FX_PCM(x) FX_DBL2FX_SGL(x) |
| #else |
| #error SAMPLE_BITS different from FRACT_BITS or DFRACT_BITS not implemented! |
| #endif |
| #endif |
| |
| /* ****** End of former fix.h ****** */ |
| |
| #define SGL_MASK ((1UL << FRACT_BITS) - 1) /* 16bit: (2^16)-1 = 0xFFFF */ |
| |
| #define MAX_SHIFT_SGL \ |
| (FRACT_BITS - 1) /* maximum possible shift for FIXP_SGL values */ |
| #define MAX_SHIFT_DBL \ |
| (DFRACT_BITS - 1) /* maximum possible shift for FIXP_DBL values */ |
| |
| /* Scale factor from/to float/fixpoint values. DO NOT USE THESE VALUES AS |
| * SATURATION LIMITS !! */ |
| #define FRACT_FIX_SCALE ((INT64(1) << (FRACT_BITS - 1))) |
| #define DFRACT_FIX_SCALE ((INT64(1) << (DFRACT_BITS - 1))) |
| |
| /* Max and Min values for saturation purposes. DO NOT USE THESE VALUES AS SCALE |
| * VALUES !! */ |
| #define MAXVAL_SGL \ |
| ((signed)0x00007FFF) /* this has to be synchronized to FRACT_BITS */ |
| #define MINVAL_SGL \ |
| ((signed)0xFFFF8000) /* this has to be synchronized to FRACT_BITS */ |
| #define MAXVAL_DBL \ |
| ((signed)0x7FFFFFFF) /* this has to be synchronized to DFRACT_BITS */ |
| #define MINVAL_DBL \ |
| ((signed)0x80000000) /* this has to be synchronized to DFRACT_BITS */ |
| |
| #define FX_DBL2FXCONST_SGL(val) \ |
| ((((((val) >> (DFRACT_BITS - FRACT_BITS - 1)) + 1) > \ |
| (((LONG)1 << FRACT_BITS) - 1)) && \ |
| ((LONG)(val) > 0)) \ |
| ? (FIXP_SGL)(SHORT)(((LONG)1 << (FRACT_BITS - 1)) - 1) \ |
| : (FIXP_SGL)(SHORT)((((val) >> (DFRACT_BITS - FRACT_BITS - 1)) + 1) >> \ |
| 1)) |
| |
| #define shouldBeUnion union /* unions are possible */ |
| |
| typedef SHORT FIXP_SGL; |
| typedef LONG FIXP_DBL; |
| |
| /* macros for compile-time conversion of constant float values to fixedpoint */ |
| #define FL2FXCONST_SPC FL2FXCONST_DBL |
| |
| #define MINVAL_DBL_CONST MINVAL_DBL |
| #define MINVAL_SGL_CONST MINVAL_SGL |
| |
| #define FL2FXCONST_SGL(val) \ |
| (FIXP_SGL)( \ |
| ((val) >= 0) \ |
| ? ((((double)(val) * (FRACT_FIX_SCALE) + 0.5) >= \ |
| (double)(MAXVAL_SGL)) \ |
| ? (SHORT)(MAXVAL_SGL) \ |
| : (SHORT)((double)(val) * (double)(FRACT_FIX_SCALE) + 0.5)) \ |
| : ((((double)(val) * (FRACT_FIX_SCALE)-0.5) <= \ |
| (double)(MINVAL_SGL_CONST)) \ |
| ? (SHORT)(MINVAL_SGL_CONST) \ |
| : (SHORT)((double)(val) * (double)(FRACT_FIX_SCALE)-0.5))) |
| |
| #define FL2FXCONST_DBL(val) \ |
| (FIXP_DBL)( \ |
| ((val) >= 0) \ |
| ? ((((double)(val) * (DFRACT_FIX_SCALE) + 0.5) >= \ |
| (double)(MAXVAL_DBL)) \ |
| ? (LONG)(MAXVAL_DBL) \ |
| : (LONG)((double)(val) * (double)(DFRACT_FIX_SCALE) + 0.5)) \ |
| : ((((double)(val) * (DFRACT_FIX_SCALE)-0.5) <= \ |
| (double)(MINVAL_DBL_CONST)) \ |
| ? (LONG)(MINVAL_DBL_CONST) \ |
| : (LONG)((double)(val) * (double)(DFRACT_FIX_SCALE)-0.5))) |
| |
| /* macros for runtime conversion of float values to integer fixedpoint. NO |
| * OVERFLOW CHECK!!! */ |
| #define FL2FX_SPC FL2FX_DBL |
| #define FL2FX_SGL(val) \ |
| ((val) > 0.0f ? (SHORT)((val) * (float)(FRACT_FIX_SCALE) + 0.5f) \ |
| : (SHORT)((val) * (float)(FRACT_FIX_SCALE)-0.5f)) |
| #define FL2FX_DBL(val) \ |
| ((val) > 0.0f ? (LONG)((val) * (float)(DFRACT_FIX_SCALE) + 0.5f) \ |
| : (LONG)((val) * (float)(DFRACT_FIX_SCALE)-0.5f)) |
| |
| /* macros for runtime conversion of fixedpoint values to other fixedpoint. NO |
| * ROUNDING!!! */ |
| #define FX_ACC2FX_SGL(val) ((FIXP_SGL)((val) >> (ACCU_BITS - FRACT_BITS))) |
| #define FX_ACC2FX_DBL(val) ((FIXP_DBL)((val) >> (ACCU_BITS - DFRACT_BITS))) |
| #define FX_SGL2FX_ACC(val) ((FIXP_ACC)((LONG)(val) << (ACCU_BITS - FRACT_BITS))) |
| #define FX_SGL2FX_DBL(val) \ |
| ((FIXP_DBL)((LONG)(val) << (DFRACT_BITS - FRACT_BITS))) |
| #define FX_DBL2FX_SGL(val) ((FIXP_SGL)((val) >> (DFRACT_BITS - FRACT_BITS))) |
| |
| /* ############################################################# */ |
| |
| /* macros for runtime conversion of integer fixedpoint values to float. */ |
| |
| /* #define FX_DBL2FL(val) ((float)(pow(2.,-31.)*(float)val)) */ /* version #1 |
| */ |
| #define FX_DBL2FL(val) \ |
| ((float)((double)(val) / (double)DFRACT_FIX_SCALE)) /* version #2 - \ |
| identical to class \ |
| dfract cast from \ |
| dfract to float */ |
| #define FX_DBL2DOUBLE(val) (((double)(val) / (double)DFRACT_FIX_SCALE)) |
| |
| /* ############################################################# */ |
| #include "fixmul.h" |
| |
| FDK_INLINE LONG fMult(SHORT a, SHORT b) { return fixmul_SS(a, b); } |
| FDK_INLINE LONG fMult(SHORT a, LONG b) { return fixmul_SD(a, b); } |
| FDK_INLINE LONG fMult(LONG a, SHORT b) { return fixmul_DS(a, b); } |
| FDK_INLINE LONG fMult(LONG a, LONG b) { return fixmul_DD(a, b); } |
| FDK_INLINE LONG fPow2(LONG a) { return fixpow2_D(a); } |
| FDK_INLINE LONG fPow2(SHORT a) { return fixpow2_S(a); } |
| |
| FDK_INLINE LONG fMultDiv2(SHORT a, SHORT b) { return fixmuldiv2_SS(a, b); } |
| FDK_INLINE LONG fMultDiv2(SHORT a, LONG b) { return fixmuldiv2_SD(a, b); } |
| FDK_INLINE LONG fMultDiv2(LONG a, SHORT b) { return fixmuldiv2_DS(a, b); } |
| FDK_INLINE LONG fMultDiv2(LONG a, LONG b) { return fixmuldiv2_DD(a, b); } |
| FDK_INLINE LONG fPow2Div2(LONG a) { return fixpow2div2_D(a); } |
| FDK_INLINE LONG fPow2Div2(SHORT a) { return fixpow2div2_S(a); } |
| |
| FDK_INLINE LONG fMultDiv2BitExact(LONG a, LONG b) { |
| return fixmuldiv2BitExact_DD(a, b); |
| } |
| FDK_INLINE LONG fMultDiv2BitExact(SHORT a, LONG b) { |
| return fixmuldiv2BitExact_SD(a, b); |
| } |
| FDK_INLINE LONG fMultDiv2BitExact(LONG a, SHORT b) { |
| return fixmuldiv2BitExact_DS(a, b); |
| } |
| FDK_INLINE LONG fMultBitExact(LONG a, LONG b) { |
| return fixmulBitExact_DD(a, b); |
| } |
| FDK_INLINE LONG fMultBitExact(SHORT a, LONG b) { |
| return fixmulBitExact_SD(a, b); |
| } |
| FDK_INLINE LONG fMultBitExact(LONG a, SHORT b) { |
| return fixmulBitExact_DS(a, b); |
| } |
| |
| /* ******************************************************************************** |
| */ |
| #include "abs.h" |
| |
| FDK_INLINE FIXP_DBL fAbs(FIXP_DBL x) { return fixabs_D(x); } |
| FDK_INLINE FIXP_SGL fAbs(FIXP_SGL x) { return fixabs_S(x); } |
| |
| #if !defined(__LP64__) |
| FDK_INLINE INT fAbs(INT x) { return fixabs_I(x); } |
| #endif |
| |
| /* ******************************************************************************** |
| */ |
| |
| #include "clz.h" |
| |
| FDK_INLINE INT fNormz(INT64 x) { |
| INT clz = fixnormz_D((INT)(x >> 32)); |
| if (clz == 32) clz += fixnormz_D((INT)x); |
| return clz; |
| } |
| FDK_INLINE INT fNormz(FIXP_DBL x) { return fixnormz_D(x); } |
| FDK_INLINE INT fNormz(FIXP_SGL x) { return fixnormz_S(x); } |
| FDK_INLINE INT fNorm(FIXP_DBL x) { return fixnorm_D(x); } |
| FDK_INLINE INT fNorm(FIXP_SGL x) { return fixnorm_S(x); } |
| |
| /* ******************************************************************************** |
| */ |
| /* ******************************************************************************** |
| */ |
| /* ******************************************************************************** |
| */ |
| |
| #include "clz.h" |
| #define fixp_abs(x) fAbs(x) |
| #define fixMin(a, b) fMin(a, b) |
| #define fixMax(a, b) fMax(a, b) |
| #define CntLeadingZeros(x) fixnormz_D(x) |
| #define CountLeadingBits(x) fixnorm_D(x) |
| |
| #include "fixmadd.h" |
| |
| /* y = (x+0.5*a*b) */ |
| FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmadddiv2_DD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmadddiv2_SD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmadddiv2_DS(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultAddDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { |
| return fixmadddiv2_SS(x, a, b); |
| } |
| |
| FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_DBL a) { |
| return fixpadddiv2_D(x, a); |
| } |
| FDK_INLINE FIXP_DBL fPow2AddDiv2(FIXP_DBL x, FIXP_SGL a) { |
| return fixpadddiv2_S(x, a); |
| } |
| |
| /* y = 2*(x+0.5*a*b) = (2x+a*b) */ |
| FDK_INLINE FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmadd_DD(x, a, b); |
| } |
| inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmadd_SD(x, a, b); |
| } |
| inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmadd_DS(x, a, b); |
| } |
| inline FIXP_DBL fMultAdd(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { |
| return fixmadd_SS(x, a, b); |
| } |
| |
| inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_DBL a) { return fixpadd_D(x, a); } |
| inline FIXP_DBL fPow2Add(FIXP_DBL x, FIXP_SGL a) { return fixpadd_S(x, a); } |
| |
| /* y = (x-0.5*a*b) */ |
| inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmsubdiv2_DD(x, a, b); |
| } |
| inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmsubdiv2_SD(x, a, b); |
| } |
| inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmsubdiv2_DS(x, a, b); |
| } |
| inline FIXP_DBL fMultSubDiv2(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { |
| return fixmsubdiv2_SS(x, a, b); |
| } |
| |
| /* y = 2*(x-0.5*a*b) = (2*x-a*b) */ |
| FDK_INLINE FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmsub_DD(x, a, b); |
| } |
| inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmsub_SD(x, a, b); |
| } |
| inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmsub_DS(x, a, b); |
| } |
| inline FIXP_DBL fMultSub(FIXP_DBL x, FIXP_SGL a, FIXP_SGL b) { |
| return fixmsub_SS(x, a, b); |
| } |
| |
| FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmadddiv2BitExact_DD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmadddiv2BitExact_SD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultAddDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmadddiv2BitExact_DS(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_DBL b) { |
| return fixmsubdiv2BitExact_DD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_SGL a, FIXP_DBL b) { |
| return fixmsubdiv2BitExact_SD(x, a, b); |
| } |
| FDK_INLINE FIXP_DBL fMultSubDiv2BitExact(FIXP_DBL x, FIXP_DBL a, FIXP_SGL b) { |
| return fixmsubdiv2BitExact_DS(x, a, b); |
| } |
| |
| #include "fixminmax.h" |
| |
| FDK_INLINE FIXP_DBL fMin(FIXP_DBL a, FIXP_DBL b) { return fixmin_D(a, b); } |
| FDK_INLINE FIXP_DBL fMax(FIXP_DBL a, FIXP_DBL b) { return fixmax_D(a, b); } |
| |
| FDK_INLINE FIXP_SGL fMin(FIXP_SGL a, FIXP_SGL b) { return fixmin_S(a, b); } |
| FDK_INLINE FIXP_SGL fMax(FIXP_SGL a, FIXP_SGL b) { return fixmax_S(a, b); } |
| |
| #if !defined(__LP64__) |
| FDK_INLINE INT fMax(INT a, INT b) { return fixmax_I(a, b); } |
| FDK_INLINE INT fMin(INT a, INT b) { return fixmin_I(a, b); } |
| #if !defined(_MSC_VER) && defined(__x86_64__) |
| FDK_INLINE SHORT fMax(SHORT a, SHORT b) { return fixmax_S(a, b); } |
| FDK_INLINE SHORT fMin(SHORT a, SHORT b) { return fixmin_S(a, b); } |
| #endif |
| #endif |
| |
| inline UINT fMax(UINT a, UINT b) { return fixmax_UI(a, b); } |
| inline UINT fMin(UINT a, UINT b) { return fixmin_UI(a, b); } |
| |
| inline UCHAR fMax(UCHAR a, UCHAR b) { |
| return (UCHAR)fixmax_UI((UINT)a, (UINT)b); |
| } |
| inline UCHAR fMin(UCHAR a, UCHAR b) { |
| return (UCHAR)fixmin_UI((UINT)a, (UINT)b); |
| } |
| |
| /* Complex data types */ |
| typedef shouldBeUnion { |
| /* vector representation for arithmetic */ |
| struct { |
| FIXP_SGL re; |
| FIXP_SGL im; |
| } v; |
| /* word representation for memory move */ |
| LONG w; |
| } |
| FIXP_SPK; |
| |
| typedef shouldBeUnion { |
| /* vector representation for arithmetic */ |
| struct { |
| FIXP_DBL re; |
| FIXP_DBL im; |
| } v; |
| /* word representation for memory move */ |
| INT64 w; |
| } |
| FIXP_DPK; |
| |
| #include "fixmul.h" |
| #include "fixmadd.h" |
| #include "cplx_mul.h" |
| #include "fixpoint_math.h" |
| |
| #endif |