| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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): |
| Description: fixed point intrinsics |
| |
| ******************************************************************************/ |
| |
| #if defined(__arm__) && defined(__GNUC__) /* cppp replaced: elif */ |
| |
| #if defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_6__) |
| #define FUNCTION_cplxMultDiv2_32x16 |
| #define FUNCTION_cplxMultDiv2_32x16X2 |
| //#define FUNCTION_cplxMult_32x16 |
| //#define FUNCTION_cplxMult_32x16X2 |
| #endif |
| |
| #define FUNCTION_cplxMultDiv2_32x32X2 |
| //#define FUNCTION_cplxMult_32x32X2 |
| |
| #ifdef FUNCTION_cplxMultDiv2_32x16 |
| inline void cplxMultDiv2( FIXP_DBL *c_Re, |
| FIXP_DBL *c_Im, |
| const FIXP_DBL a_Re, |
| const FIXP_DBL a_Im, |
| const FIXP_SPK wpk ) |
| { |
| LONG tmp1,tmp2; |
| const LONG w = wpk.w; |
| |
| asm("smulwt %0, %3, %4;\n" |
| "rsb %1,%0,#0;\n" |
| "smlawb %0, %2, %4, %1;\n" |
| "smulwt %1, %2, %4;\n" |
| "smlawb %1, %3, %4, %1;\n" |
| : "=&r"(tmp1), "=&r"(tmp2) |
| : "r"(a_Re), "r"(a_Im), "r"(w) |
| ); |
| |
| *c_Re = tmp1; |
| *c_Im = tmp2; |
| } |
| #endif /* FUNCTION_cplxMultDiv2_32x16 */ |
| |
| #ifdef FUNCTION_cplxMultDiv2_32x16X2 |
| inline void cplxMultDiv2( FIXP_DBL *c_Re, |
| FIXP_DBL *c_Im, |
| const FIXP_DBL a_Re, |
| const FIXP_DBL a_Im, |
| const FIXP_SGL b_Re, |
| const FIXP_SGL b_Im) |
| { |
| LONG tmp1, tmp2; |
| |
| asm("smulwb %0, %3, %5;\n" /* %7 = -a_Im * b_Im */ |
| "rsb %1,%0,#0;\n" |
| "smlawb %0, %2, %4, %1;\n" /* tmp1 = a_Re * b_Re - a_Im * b_Im */ |
| "smulwb %1, %2, %5;\n" /* %7 = a_Re * b_Im */ |
| "smlawb %1, %3, %4, %1;\n" /* tmp2 = a_Im * b_Re + a_Re * b_Im */ |
| : "=&r"(tmp1), "=&r"(tmp2) |
| : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) |
| ); |
| |
| *c_Re = tmp1; |
| *c_Im = tmp2; |
| } |
| #endif /* FUNCTION_cplxMultDiv2_32x16X2 */ |
| |
| #ifdef FUNCTION_cplxMultAddDiv2_32x16X2 |
| inline void cplxMultAddDiv2( FIXP_DBL *c_Re, |
| FIXP_DBL *c_Im, |
| const FIXP_DBL a_Re, |
| const FIXP_DBL a_Im, |
| const FIXP_SGL b_Re, |
| const FIXP_SGL b_Im) |
| { |
| LONG tmp1, tmp2; |
| |
| asm("smulwb %0, %3, %5;\n" |
| "rsb %1,%0,#0;\n" |
| "smlawb %0, %2, %4, %1;\n" |
| "smulwb %1, %2, %5;\n" |
| "smlawb %1, %3, %4, %1;\n" |
| : "=&r"(tmp1), "=&r"(tmp2) |
| : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) |
| ); |
| |
| *c_Re += tmp1; |
| *c_Im += tmp2; |
| } |
| #endif /* FUNCTION_cplxMultAddDiv2_32x16X2 */ |
| |
| |
| #ifdef FUNCTION_cplxMultDiv2_32x32X2 |
| inline void cplxMultDiv2( FIXP_DBL *c_Re, |
| FIXP_DBL *c_Im, |
| const FIXP_DBL a_Re, |
| const FIXP_DBL a_Im, |
| const FIXP_DBL b_Re, |
| const FIXP_DBL b_Im) |
| { |
| LONG tmp1, tmp2; |
| |
| #ifdef __ARM_ARCH_6__ |
| asm( |
| "smmul %0, %2, %4;\n" /* tmp1 = a_Re * b_Re */ |
| "smmls %0, %3, %5, %0;\n" /* tmp1 -= a_Im * b_Im */ |
| "smmul %1, %2, %5;\n" /* tmp2 = a_Re * b_Im */ |
| "smmla %1, %3, %4, %1;\n" /* tmp2 += a_Im * b_Re */ |
| : "=&r"(tmp1), "=&r"(tmp2) |
| : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im) |
| : "r0" |
| ); |
| #else |
| LONG discard; |
| asm( |
| "smull %2, %0, %7, %6;\n" /* tmp1 = -a_Im * b_Im */ |
| "smlal %2, %0, %3, %5;\n" /* tmp1 += a_Re * b_Re */ |
| "smull %2, %1, %3, %6;\n" /* tmp2 = a_Re * b_Im */ |
| "smlal %2, %1, %4, %5;\n" /* tmp2 += a_Im * b_Re */ |
| : "=&r"(tmp1), "=&r"(tmp2), "=&r"(discard) |
| : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im), "r"(-a_Im) |
| ); |
| #endif |
| *c_Re = tmp1; |
| *c_Im = tmp2; |
| } |
| #endif /* FUNCTION_cplxMultDiv2_32x32X2 */ |
| |
| |
| #endif |
| |
