1
2/* -----------------------------------------------------------------------------------------------------------
3Software License for The Fraunhofer FDK AAC Codec Library for Android
4
5� Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung 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