1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and the date of any change. For modified versions of the FDK AAC Codec, the term 50"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/*************************** Fraunhofer IIS FDK Tools ********************** 85 86 Author(s): 87 Description: fixed point intrinsics 88 89******************************************************************************/ 90 91#if defined(__arm__) && defined(__GNUC__) /* cppp replaced: elif */ 92 93#if defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_6__) 94 #define FUNCTION_cplxMultDiv2_32x16 95 #define FUNCTION_cplxMultDiv2_32x16X2 96 //#define FUNCTION_cplxMult_32x16 97 //#define FUNCTION_cplxMult_32x16X2 98#endif 99 100#define FUNCTION_cplxMultDiv2_32x32X2 101//#define FUNCTION_cplxMult_32x32X2 102 103#ifdef FUNCTION_cplxMultDiv2_32x16 104inline void cplxMultDiv2( FIXP_DBL *c_Re, 105 FIXP_DBL *c_Im, 106 const FIXP_DBL a_Re, 107 const FIXP_DBL a_Im, 108 const FIXP_SPK wpk ) 109{ 110 LONG tmp1,tmp2; 111 const LONG w = wpk.w; 112 113 asm("smulwt %0, %3, %4;\n" 114 "rsb %1,%0,#0;\n" 115 "smlawb %0, %2, %4, %1;\n" 116 "smulwt %1, %2, %4;\n" 117 "smlawb %1, %3, %4, %1;\n" 118 : "=&r"(tmp1), "=&r"(tmp2) 119 : "r"(a_Re), "r"(a_Im), "r"(w) 120 ); 121 122 *c_Re = tmp1; 123 *c_Im = tmp2; 124} 125#endif /* FUNCTION_cplxMultDiv2_32x16 */ 126 127#ifdef FUNCTION_cplxMultDiv2_32x16X2 128inline void cplxMultDiv2( FIXP_DBL *c_Re, 129 FIXP_DBL *c_Im, 130 const FIXP_DBL a_Re, 131 const FIXP_DBL a_Im, 132 const FIXP_SGL b_Re, 133 const FIXP_SGL b_Im) 134{ 135 LONG tmp1, tmp2; 136 137 asm("smulwb %0, %3, %5;\n" /* %7 = -a_Im * b_Im */ 138 "rsb %1,%0,#0;\n" 139 "smlawb %0, %2, %4, %1;\n" /* tmp1 = a_Re * b_Re - a_Im * b_Im */ 140 "smulwb %1, %2, %5;\n" /* %7 = a_Re * b_Im */ 141 "smlawb %1, %3, %4, %1;\n" /* tmp2 = a_Im * b_Re + a_Re * b_Im */ 142 : "=&r"(tmp1), "=&r"(tmp2) 143 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) 144 ); 145 146 *c_Re = tmp1; 147 *c_Im = tmp2; 148} 149#endif /* FUNCTION_cplxMultDiv2_32x16X2 */ 150 151#ifdef FUNCTION_cplxMultAddDiv2_32x16X2 152inline void cplxMultAddDiv2( FIXP_DBL *c_Re, 153 FIXP_DBL *c_Im, 154 const FIXP_DBL a_Re, 155 const FIXP_DBL a_Im, 156 const FIXP_SGL b_Re, 157 const FIXP_SGL b_Im) 158{ 159 LONG tmp1, tmp2; 160 161 asm("smulwb %0, %3, %5;\n" 162 "rsb %1,%0,#0;\n" 163 "smlawb %0, %2, %4, %1;\n" 164 "smulwb %1, %2, %5;\n" 165 "smlawb %1, %3, %4, %1;\n" 166 : "=&r"(tmp1), "=&r"(tmp2) 167 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) 168 ); 169 170 *c_Re += tmp1; 171 *c_Im += tmp2; 172} 173#endif /* FUNCTION_cplxMultAddDiv2_32x16X2 */ 174 175 176#ifdef FUNCTION_cplxMultDiv2_32x32X2 177inline void cplxMultDiv2( FIXP_DBL *c_Re, 178 FIXP_DBL *c_Im, 179 const FIXP_DBL a_Re, 180 const FIXP_DBL a_Im, 181 const FIXP_DBL b_Re, 182 const FIXP_DBL b_Im) 183{ 184 LONG tmp1, tmp2; 185 186#ifdef __ARM_ARCH_6__ 187 asm( 188 "smmul %0, %2, %4;\n" /* tmp1 = a_Re * b_Re */ 189 "smmls %0, %3, %5, %0;\n" /* tmp1 -= a_Im * b_Im */ 190 "smmul %1, %2, %5;\n" /* tmp2 = a_Re * b_Im */ 191 "smmla %1, %3, %4, %1;\n" /* tmp2 += a_Im * b_Re */ 192 : "=&r"(tmp1), "=&r"(tmp2) 193 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) 194 : "r0" 195 ); 196#else 197 LONG discard; 198 asm( 199 "smull %2, %0, %7, %6;\n" /* tmp1 = -a_Im * b_Im */ 200 "smlal %2, %0, %3, %5;\n" /* tmp1 += a_Re * b_Re */ 201 "smull %2, %1, %3, %6;\n" /* tmp2 = a_Re * b_Im */ 202 "smlal %2, %1, %4, %5;\n" /* tmp2 += a_Im * b_Re */ 203 : "=&r"(tmp1), "=&r"(tmp2), "=&r"(discard) 204 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im), "r"(-a_Im) 205 ); 206 #endif 207 *c_Re = tmp1; 208 *c_Im = tmp2; 209} 210#endif /* FUNCTION_cplxMultDiv2_32x32X2 */ 211 212 213#endif 214 215