1 /* -----------------------------------------------------------------------------
2 Software License for The Fraunhofer FDK AAC Codec Library for Android
3
4 © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
5 Forschung e.V. All rights reserved.
6
7 1. INTRODUCTION
8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
10 scheme for digital audio. This FDK AAC Codec software is intended to be used on
11 a wide variety of Android devices.
12
13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
14 general perceptual audio codecs. AAC-ELD is considered the best-performing
15 full-bandwidth communications codec by independent studies and is widely
16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG
17 specifications.
18
19 Patent licenses for necessary patent claims for the FDK AAC Codec (including
20 those of Fraunhofer) may be obtained through Via Licensing
21 (www.vialicensing.com) or through the respective patent owners individually for
22 the purpose of encoding or decoding bit streams in products that are compliant
23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
24 Android devices already license these patent claims through Via Licensing or
25 directly from the patent owners, and therefore FDK AAC Codec software may
26 already be covered under those patent licenses when it is used for those
27 licensed purposes only.
28
29 Commercially-licensed AAC software libraries, including floating-point versions
30 with enhanced sound quality, are also available from Fraunhofer. Users are
31 encouraged to check the Fraunhofer website for additional applications
32 information and documentation.
33
34 2. COPYRIGHT LICENSE
35
36 Redistribution and use in source and binary forms, with or without modification,
37 are permitted without payment of copyright license fees provided that you
38 satisfy the following conditions:
39
40 You must retain the complete text of this software license in redistributions of
41 the FDK AAC Codec or your modifications thereto in source code form.
42
43 You must retain the complete text of this software license in the documentation
44 and/or other materials provided with redistributions of the FDK AAC Codec or
45 your modifications thereto in binary form. You must make available free of
46 charge copies of the complete source code of the FDK AAC Codec and your
47 modifications thereto to recipients of copies in binary form.
48
49 The name of Fraunhofer may not be used to endorse or promote products derived
50 from this library without prior written permission.
51
52 You may not charge copyright license fees for anyone to use, copy or distribute
53 the FDK AAC Codec software or your modifications thereto.
54
55 Your modified versions of the FDK AAC Codec must carry prominent notices stating
56 that you changed the software and the date of any change. For modified versions
57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
59 AAC Codec Library for Android."
60
61 3. NO PATENT LICENSE
62
63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
65 Fraunhofer provides no warranty of patent non-infringement with respect to this
66 software.
67
68 You may use this FDK AAC Codec software or modifications thereto only for
69 purposes that are authorized by appropriate patent licenses.
70
71 4. DISCLAIMER
72
73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
75 including but not limited to the implied warranties of merchantability and
76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
78 or consequential damages, including but not limited to procurement of substitute
79 goods or services; loss of use, data, or profits, or business interruption,
80 however caused and on any theory of liability, whether in contract, strict
81 liability, or tort (including negligence), arising in any way out of the use of
82 this software, even if advised of the possibility of such damage.
83
84 5. CONTACT INFORMATION
85
86 Fraunhofer Institute for Integrated Circuits IIS
87 Attention: Audio and Multimedia Departments - FDK AAC LL
88 Am Wolfsmantel 33
89 91058 Erlangen, Germany
90
91 www.iis.fraunhofer.de/amm
92 amm-info@iis.fraunhofer.de
93 ----------------------------------------------------------------------------- */
94
95 /******************* Library for basic calculation routines ********************
96
97 Author(s):
98
99 Description: fixed point intrinsics
100
101 *******************************************************************************/
102
103 #if !defined(CPLX_MUL_ARM_H)
104 #define CPLX_MUL_ARM_H
105
106 #if defined(__arm__) && defined(__GNUC__)
107
108 #if defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_6__) || \
109 defined(__ARM_ARCH_8__)
110 #define FUNCTION_cplxMultDiv2_32x16
111 #define FUNCTION_cplxMultDiv2_32x16X2
112 #endif
113
114 #define FUNCTION_cplxMultDiv2_32x32X2
115 #ifdef FUNCTION_cplxMultDiv2_32x32X2
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)116 inline void cplxMultDiv2(FIXP_DBL *c_Re, FIXP_DBL *c_Im, const FIXP_DBL a_Re,
117 const FIXP_DBL a_Im, const FIXP_DBL b_Re,
118 const FIXP_DBL b_Im) {
119 LONG tmp1, tmp2;
120
121 #ifdef __ARM_ARCH_8__
122 asm("smull %x0, %w2, %w4; \n" /* tmp1 = a_Re * b_Re */
123 "smull %x1, %w2, %w5; \n" /* tmp2 = a_Re * b_Im */
124 "smsubl %x0, %w3, %w5, %x0; \n" /* tmp1 -= a_Im * b_Im */
125 "smaddl %x1, %w3, %w4, %x1; \n" /* tmp2 += a_Im * b_Re */
126 "asr %x0, %x0, #32 \n"
127 "asr %x1, %x1, #32 \n"
128 : "=&r"(tmp1), "=&r"(tmp2)
129 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im));
130 #elif defined(__ARM_ARCH_6__)
131 asm("smmul %0, %2, %4;\n" /* tmp1 = a_Re * b_Re */
132 "smmls %0, %3, %5, %0;\n" /* tmp1 -= a_Im * b_Im */
133 "smmul %1, %2, %5;\n" /* tmp2 = a_Re * b_Im */
134 "smmla %1, %3, %4, %1;\n" /* tmp2 += a_Im * b_Re */
135 : "=&r"(tmp1), "=&r"(tmp2)
136 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im));
137 #else
138 LONG discard;
139 asm("smull %2, %0, %7, %6;\n" /* tmp1 = -a_Im * b_Im */
140 "smlal %2, %0, %3, %5;\n" /* tmp1 += a_Re * b_Re */
141 "smull %2, %1, %3, %6;\n" /* tmp2 = a_Re * b_Im */
142 "smlal %2, %1, %4, %5;\n" /* tmp2 += a_Im * b_Re */
143 : "=&r"(tmp1), "=&r"(tmp2), "=&r"(discard)
144 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im), "r"(-a_Im));
145 #endif
146 *c_Re = tmp1;
147 *c_Im = tmp2;
148 }
149 #endif /* FUNCTION_cplxMultDiv2_32x32X2 */
150
151 #if defined(FUNCTION_cplxMultDiv2_32x16)
cplxMultDiv2(FIXP_DBL * c_Re,FIXP_DBL * c_Im,const FIXP_DBL a_Re,const FIXP_DBL a_Im,FIXP_SPK wpk)152 inline void cplxMultDiv2(FIXP_DBL *c_Re, FIXP_DBL *c_Im, const FIXP_DBL a_Re,
153 const FIXP_DBL a_Im, FIXP_SPK wpk) {
154 #ifdef __ARM_ARCH_8__
155 FIXP_DBL b_Im = FX_SGL2FX_DBL(wpk.v.im);
156 FIXP_DBL b_Re = FX_SGL2FX_DBL(wpk.v.re);
157 cplxMultDiv2(c_Re, c_Im, a_Re, a_Im, b_Re, b_Im);
158 #else
159 LONG tmp1, tmp2;
160 const LONG w = wpk.w;
161 asm("smulwt %0, %3, %4;\n"
162 "rsb %1,%0,#0;\n"
163 "smlawb %0, %2, %4, %1;\n"
164 "smulwt %1, %2, %4;\n"
165 "smlawb %1, %3, %4, %1;\n"
166 : "=&r"(tmp1), "=&r"(tmp2)
167 : "r"(a_Re), "r"(a_Im), "r"(w));
168 *c_Re = tmp1;
169 *c_Im = tmp2;
170 #endif
171 }
172 #endif /* FUNCTION_cplxMultDiv2_32x16 */
173
174 #ifdef FUNCTION_cplxMultDiv2_32x16X2
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)175 inline void cplxMultDiv2(FIXP_DBL *c_Re, FIXP_DBL *c_Im, const FIXP_DBL a_Re,
176 const FIXP_DBL a_Im, const FIXP_SGL b_Re,
177 const FIXP_SGL b_Im) {
178 #ifdef __ARM_ARCH_8__
179 FIXP_DBL b_re = FX_SGL2FX_DBL(b_Re);
180 FIXP_DBL b_im = FX_SGL2FX_DBL(b_Im);
181 cplxMultDiv2(c_Re, c_Im, a_Re, a_Im, b_re, b_im);
182 #else
183 LONG tmp1, tmp2;
184
185 asm("smulwb %0, %3, %5;\n" /* %7 = -a_Im * b_Im */
186 "rsb %1,%0,#0;\n"
187 "smlawb %0, %2, %4, %1;\n" /* tmp1 = a_Re * b_Re - a_Im * b_Im */
188 "smulwb %1, %2, %5;\n" /* %7 = a_Re * b_Im */
189 "smlawb %1, %3, %4, %1;\n" /* tmp2 = a_Im * b_Re + a_Re * b_Im */
190 : "=&r"(tmp1), "=&r"(tmp2)
191 : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im));
192
193 *c_Re = tmp1;
194 *c_Im = tmp2;
195 #endif
196 }
197 #endif /* FUNCTION_cplxMultDiv2_32x16X2 */
198
199 #endif
200
201 #endif /* !defined(CPLX_MUL_ARM_H) */
202