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(FIXMUL_ARM_H)
104 #define FIXMUL_ARM_H
105
106 #if defined(__arm__)
107
108 #if defined(__GNUC__) && defined(__arm__)
109 /* ARM with GNU compiler */
110
111 #define FUNCTION_fixmuldiv2_DD
112
113 #define FUNCTION_fixmuldiv2BitExact_DD
114 #ifdef FUNCTION_fixmuldiv2BitExact_DD
115 #define fixmuldiv2BitExact_DD(a, b) fixmuldiv2_DD(a, b)
116 #endif /* #ifdef FUNCTION_fixmuldiv2BitExact_DD */
117
118 #define FUNCTION_fixmulBitExact_DD
119 #ifdef FUNCTION_fixmulBitExact_DD
120 #define fixmulBitExact_DD(a, b) (fixmuldiv2BitExact_DD(a, b) << 1)
121 #endif /* #ifdef FUNCTION_fixmulBitExact_DD */
122
123 #define FUNCTION_fixmuldiv2BitExact_DS
124 #ifdef FUNCTION_fixmuldiv2BitExact_DS
125 #define fixmuldiv2BitExact_DS(a, b) fixmuldiv2_DS(a, b)
126 #endif /* #ifdef FUNCTION_fixmuldiv2BitExact_DS */
127
128 #define FUNCTION_fixmulBitExact_DS
129 #ifdef FUNCTION_fixmulBitExact_DS
130 #define fixmulBitExact_DS(a, b) fixmul_DS(a, b)
131 #endif /* #ifdef FUNCTION_fixmulBitExact_DS */
132
133 #ifdef FUNCTION_fixmuldiv2_DD
fixmuldiv2_DD(const INT a,const INT b)134 inline INT fixmuldiv2_DD(const INT a, const INT b) {
135 INT result;
136 #if defined(__ARM_ARCH_8__)
137 INT64 result64;
138 __asm__(
139 "smull %x0, %w1, %w2;\n"
140 "asr %x0, %x0, #32; "
141 : "=r"(result64)
142 : "r"(a), "r"(b));
143 result = (INT)result64;
144 #elif defined(__ARM_ARCH_6__) || defined(__TARGET_ARCH_7E_M)
145 __asm__("smmul %0, %1, %2" : "=r"(result) : "r"(a), "r"(b));
146 #else
147 INT discard;
148 __asm__("smull %0, %1, %2, %3"
149 : "=&r"(discard), "=r"(result)
150 : "r"(a), "r"(b));
151 #endif
152 return result;
153 }
154 #endif /* #ifdef FUNCTION_fixmuldiv2_DD */
155
156 #if defined(__ARM_ARCH_8__)
157 #define FUNCTION_fixmuldiv2_SD
158 #ifdef FUNCTION_fixmuldiv2_SD
fixmuldiv2_SD(const SHORT a,const INT b)159 inline INT fixmuldiv2_SD(const SHORT a, const INT b) {
160 return fixmuldiv2_DD((INT)(a << 16), b);
161 }
162 #endif /* #ifdef FUNCTION_fixmuldiv2_SD */
163 #elif defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_6__)
164 #define FUNCTION_fixmuldiv2_SD
165 #ifdef FUNCTION_fixmuldiv2_SD
fixmuldiv2_SD(const SHORT a,const INT b)166 inline INT fixmuldiv2_SD(const SHORT a, const INT b) {
167 INT result;
168 __asm__("smulwb %0, %1, %2" : "=r"(result) : "r"(b), "r"(a));
169 return result;
170 }
171 #endif /* #ifdef FUNCTION_fixmuldiv2_SD */
172 #endif
173
174 #define FUNCTION_fixmul_DD
175 #ifdef FUNCTION_fixmul_DD
176 #if defined(__ARM_ARCH_8__)
fixmul_DD(const INT a,const INT b)177 inline INT fixmul_DD(const INT a, const INT b) {
178 INT64 result64;
179
180 __asm__(
181 "smull %x0, %w1, %w2;\n"
182 "asr %x0, %x0, #31; "
183 : "=r"(result64)
184 : "r"(a), "r"(b));
185 return (INT)result64;
186 }
187 #else
fixmul_DD(const INT a,const INT b)188 inline INT fixmul_DD(const INT a, const INT b) {
189 return (fixmuldiv2_DD(a, b) << 1);
190 }
191 #endif /* __ARM_ARCH_8__ */
192 #endif /* #ifdef FUNCTION_fixmul_DD */
193
194 #endif /* defined(__GNUC__) && defined(__arm__) */
195
196 #endif /* __arm__ */
197
198 #endif /* !defined(FIXMUL_ARM_H) */
199