mirror of https://github.com/mstorsjo/fdk-aac.git
287 lines
10 KiB
C
287 lines
10 KiB
C
|
|
/* -----------------------------------------------------------------------------------------------------------
|
|
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): Stefan Gewinner
|
|
Description: fixed point multiplication
|
|
|
|
******************************************************************************/
|
|
|
|
#if !defined(__FIXMUL_H__)
|
|
#define __FIXMUL_H__
|
|
|
|
#include "FDK_archdef.h"
|
|
#include "machine_type.h"
|
|
|
|
|
|
#if defined(__arm__)
|
|
#include "arm/fixmul_arm.h"
|
|
|
|
#elif defined(__mips__) /* cppp replaced: elif */
|
|
#include "mips/fixmul_mips.h"
|
|
|
|
#elif defined(__x86__) /* cppp replaced: elif */
|
|
#include "x86/fixmul_x86.h"
|
|
|
|
#endif /* all cores */
|
|
|
|
/*************************************************************************
|
|
*************************************************************************
|
|
Software fallbacks for missing functions
|
|
**************************************************************************
|
|
**************************************************************************/
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2_DD)
|
|
#define FUNCTION_fixmuldiv2_DD
|
|
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
|
|
#pragma message ("Extremely slow implementation of fixmuldiv2_DD !!")
|
|
#else
|
|
#warning Extremely slow implementation of fixmuldiv2_DD !!
|
|
#endif
|
|
inline LONG fixmuldiv2_DD (const LONG a, const LONG b)
|
|
{
|
|
return (LONG) ((((INT64)a) * b) >> 32) ;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2BitExact_DD)
|
|
#define FUNCTION_fixmuldiv2BitExact_DD
|
|
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
|
|
#pragma message ("Extremely slow implementation of fixmuldiv2BitExact_DD !!")
|
|
#else
|
|
#warning Extremely slow implementation of fixmuldiv2BitExact_DD !!
|
|
#endif
|
|
inline LONG fixmuldiv2BitExact_DD (const LONG a, const LONG b)
|
|
{
|
|
return (LONG) ((((INT64)a) * b) >> 32) ;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmul_DD)
|
|
#define FUNCTION_fixmul_DD
|
|
inline LONG fixmul_DD (const LONG a, const LONG b)
|
|
{ return fixmuldiv2_DD (a, b) << 1 ; }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmulBitExact_DD)
|
|
#define FUNCTION_fixmulBitExact_DD
|
|
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__) || defined(__XTENSA__)
|
|
#pragma message ("Extremely slow implementation of fixmulBitExact_DD !!")
|
|
#else
|
|
#warning Extremely slow implementation of fixmulBitExact_DD !!
|
|
#endif
|
|
inline LONG fixmulBitExact_DD (const LONG a, const LONG b)
|
|
{
|
|
return ( (LONG) ((((INT64)a) * b) >> 32) ) << 1;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2_SS)
|
|
#define FUNCTION_fixmuldiv2_SS
|
|
inline LONG fixmuldiv2_SS (const SHORT a, const SHORT b)
|
|
{ return ((LONG)a*b); }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmul_SS)
|
|
#define FUNCTION_fixmul_SS
|
|
inline LONG fixmul_SS (const SHORT a, const SHORT b)
|
|
{ return (a*b) <<1; }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2_SD)
|
|
#define FUNCTION_fixmuldiv2_SD
|
|
inline LONG fixmuldiv2_SD (const SHORT a, const LONG b)
|
|
#ifdef FUNCTION_fixmuldiv2_DS
|
|
{ return fixmuldiv2_DS(b, a); }
|
|
#else
|
|
{ return fixmuldiv2_DD(FX_SGL2FX_DBL(a), b); }
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2_DS)
|
|
#define FUNCTION_fixmuldiv2_DS
|
|
inline LONG fixmuldiv2_DS (const LONG a, const SHORT b)
|
|
#ifdef FUNCTION_fixmuldiv2_SD
|
|
{ return fixmuldiv2_SD(b, a); }
|
|
#else
|
|
{ return fixmuldiv2_DD(a, FX_SGL2FX_DBL(b)); }
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2BitExact_SD)
|
|
#define FUNCTION_fixmuldiv2BitExact_SD
|
|
inline LONG fixmuldiv2BitExact_SD (const SHORT a, const LONG b)
|
|
#ifdef FUNCTION_fixmuldiv2BitExact_DS
|
|
{ return fixmuldiv2BitExact_DS(b, a); }
|
|
#else
|
|
{ return (LONG) ((((INT64)a) * b) >> 16) ; }
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmuldiv2BitExact_DS)
|
|
#define FUNCTION_fixmuldiv2BitExact_DS
|
|
inline LONG fixmuldiv2BitExact_DS (const LONG a, const SHORT b)
|
|
#ifdef FUNCTION_fixmuldiv2BitExact_SD
|
|
{ return fixmuldiv2BitExact_SD(b, a); }
|
|
#else
|
|
{ return (LONG) ((((INT64)a) * b) >> 16) ; }
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmul_SD)
|
|
#define FUNCTION_fixmul_SD
|
|
inline LONG fixmul_SD (const SHORT a, const LONG b) {
|
|
#ifdef FUNCTION_fixmul_DS
|
|
return fixmul_SD(b, a);
|
|
#else
|
|
return fixmuldiv2_SD (a, b) << 1 ;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmul_DS)
|
|
#define FUNCTION_fixmul_DS
|
|
inline LONG fixmul_DS (const LONG a, const SHORT b) {
|
|
#ifdef FUNCTION_fixmul_SD
|
|
return fixmul_SD(b, a);
|
|
#else
|
|
return fixmuldiv2_DS(a, b) << 1 ;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmulBitExact_SD)
|
|
#define FUNCTION_fixmulBitExact_SD
|
|
inline LONG fixmulBitExact_SD (const SHORT a, const LONG b)
|
|
#ifdef FUNCTION_fixmulBitExact_DS
|
|
{ return fixmulBitExact_DS(b, a); }
|
|
#else
|
|
{ return (LONG) (((((INT64)a) * b) >> 16) << 1); }
|
|
#endif
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixmulBitExact_DS)
|
|
#define FUNCTION_fixmulBitExact_DS
|
|
inline LONG fixmulBitExact_DS (const LONG a, const SHORT b)
|
|
#ifdef FUNCTION_fixmulBitExact_SD
|
|
{ return fixmulBitExact_SD(b, a); }
|
|
#else
|
|
{ return (LONG) (((((INT64)a) * b) >> 16) << 1); }
|
|
#endif
|
|
#endif
|
|
|
|
|
|
#if !defined(FUNCTION_fixpow2div2_D)
|
|
#ifdef ARCH_WA_16BITMULT
|
|
#error Fallback for fixpow2div2_D is not 16 bit safe !
|
|
#endif
|
|
#define FUNCTION_fixpow2div2_D
|
|
inline LONG fixpow2div2_D (const LONG a)
|
|
{ return fixmuldiv2_DD(a, a); }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixpow2_D)
|
|
#ifdef ARCH_WA_16BITMULT
|
|
#error Fallback for fixpow2_D is not 16 bit safe !
|
|
#endif
|
|
#define FUNCTION_fixpow2_D
|
|
inline LONG fixpow2_D (const LONG a)
|
|
{ return fixpow2div2_D(a)<<1; }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixpow2div2_S)
|
|
#define FUNCTION_fixpow2div2_S
|
|
inline LONG fixpow2div2_S (const SHORT a)
|
|
{ return fixmuldiv2_SS(a, a); }
|
|
#endif
|
|
|
|
#if !defined(FUNCTION_fixpow2_S)
|
|
#define FUNCTION_fixpow2_S
|
|
inline LONG fixpow2_S (const SHORT a)
|
|
{ return fixpow2div2_S(a)<<1; }
|
|
#endif
|
|
|
|
|
|
#endif /* __FIXMUL_H__ */
|