| /* ----------------------------------------------------------------------------- |
| 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): Marc Gayer |
| |
| Description: fixed point intrinsics |
| |
| *******************************************************************************/ |
| |
| #if !defined(CLZ_H) |
| #define CLZ_H |
| |
| #include "FDK_archdef.h" |
| #include "machine_type.h" |
| |
| #if defined(__arm__) |
| #include "arm/clz_arm.h" |
| |
| #elif defined(__mips__) |
| #include "mips/clz_mips.h" |
| |
| #elif defined(__x86__) |
| #include "x86/clz_x86.h" |
| |
| #endif /* all cores */ |
| |
| /************************************************************************* |
| ************************************************************************* |
| Software fallbacks for missing functions. |
| ************************************************************************** |
| **************************************************************************/ |
| |
| #if !defined(FUNCTION_fixnormz_S) |
| #ifdef FUNCTION_fixnormz_D |
| inline INT fixnormz_S(SHORT a) { |
| if (a < 0) { |
| return 0; |
| } |
| return fixnormz_D((INT)(a)) - 16; |
| } |
| #else |
| inline INT fixnormz_S(SHORT a) { |
| int leadingBits = 0; |
| a = ~a; |
| while (a & 0x8000) { |
| leadingBits++; |
| a <<= 1; |
| } |
| |
| return (leadingBits); |
| } |
| #endif |
| #endif |
| |
| #if !defined(FUNCTION_fixnormz_D) |
| inline INT fixnormz_D(LONG a) { |
| INT leadingBits = 0; |
| a = ~a; |
| while (a & 0x80000000) { |
| leadingBits++; |
| a <<= 1; |
| } |
| |
| return (leadingBits); |
| } |
| #endif |
| |
| /***************************************************************************** |
| |
| functionname: fixnorm_D |
| description: Count leading ones or zeros of operand val for dfract/LONG INT |
| values. Return this value minus 1. Return 0 if operand==0. |
| *****************************************************************************/ |
| #if !defined(FUNCTION_fixnorm_S) |
| #ifdef FUNCTION_fixnorm_D |
| inline INT fixnorm_S(FIXP_SGL val) { |
| if (val == (FIXP_SGL)0) { |
| return 0; |
| } |
| return fixnorm_D((INT)(val)) - 16; |
| } |
| #else |
| inline INT fixnorm_S(FIXP_SGL val) { |
| INT leadingBits = 0; |
| if (val != (FIXP_SGL)0) { |
| if (val < (FIXP_SGL)0) { |
| val = ~val; |
| } |
| leadingBits = fixnormz_S(val) - 1; |
| } |
| return (leadingBits); |
| } |
| #endif |
| #endif |
| |
| #if !defined(FUNCTION_fixnorm_D) |
| inline INT fixnorm_D(FIXP_DBL val) { |
| INT leadingBits = 0; |
| if (val != (FIXP_DBL)0) { |
| if (val < (FIXP_DBL)0) { |
| val = ~val; |
| } |
| leadingBits = fixnormz_D(val) - 1; |
| } |
| return (leadingBits); |
| } |
| #endif |
| |
| #endif /* CLZ_H */ |