| |
| /* ----------------------------------------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2012 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 |
| ----------------------------------------------------------------------------------------------------------- */ |
| |
| /*************************** Fraunhofer IIS FDK Tools ********************** |
| |
| 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 ****** */ |
| |
| /* Configure fractional or integer arithmetic */ |
| #define FIX_FRACT 0 /* Define this to "1" to use fractional arithmetic simulation in class fract instead of integer arithmetic */ |
| /* 1 for debug with extra runtime overflow checking. */ |
| |
| /* 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 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 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. */ |
| /* This is just for temporary use and should not be required in a final version! */ |
| |
| /* #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 */ |
| |
| /* ############################################################# */ |
| #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 INT fMultI(LONG a, SHORT b) { return ( (INT)(((1<<(FRACT_BITS-2)) + |
| fixmuldiv2_DD(a,((INT)b<<FRACT_BITS)))>>(FRACT_BITS-1)) ); } |
| |
| FDK_INLINE INT fMultIfloor(LONG a, INT b) { return ( (INT)((1 + |
| fixmuldiv2_DD(a,(b<<FRACT_BITS))) >> (FRACT_BITS-1)) ); } |
| |
| FDK_INLINE INT fMultIceil(LONG a, INT b) { return ( (INT)(((INT)0x7fff + |
| fixmuldiv2_DD(a,(b<<FRACT_BITS))) >> (FRACT_BITS-1)) ); } |
| |
| 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); } |
| |
| |
| /* workaround for TI C6x compiler but not for TI ARM9E compiler */ |
| #if (!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__) |
| FDK_INLINE INT fAbs(INT x) |
| { return fixabs_I(x); } |
| #endif |
| |
| /* ******************************************************************************** */ |
| |
| #include "clz.h" |
| |
| 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); } |
| |
| |
| /* workaround for TI C6x compiler but not for TI ARM9E */ |
| #if ((!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__)) || (FIX_FRACT == 1) |
| 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); } |
| #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); } |
| |
| /* 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 "scale.h" |
| #include "fixpoint_math.h" |
| |
| #endif |
