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): Stefan Gewinner
98
99 Description: fixed point multiplication
100
101 *******************************************************************************/
102
103 #if !defined(FIXMUL_H)
104 #define FIXMUL_H
105
106 #include "FDK_archdef.h"
107 #include "machine_type.h"
108
109 #if defined(__arm__)
110 #include "arm/fixmul_arm.h"
111
112 #elif defined(__mips__)
113 #include "mips/fixmul_mips.h"
114
115 #elif defined(__x86__)
116 #include "x86/fixmul_x86.h"
117
118 #endif /* all cores */
119
120 /*************************************************************************
121 *************************************************************************
122 Software fallbacks for missing functions
123 **************************************************************************
124 **************************************************************************/
125
126 #if !defined(FUNCTION_fixmuldiv2_DD)
127 #define FUNCTION_fixmuldiv2_DD
fixmuldiv2_DD(const LONG a,const LONG b)128 inline LONG fixmuldiv2_DD(const LONG a, const LONG b) {
129 return (LONG)((((INT64)a) * b) >> 32);
130 }
131 #endif
132
133 #if !defined(FUNCTION_fixmuldiv2BitExact_DD)
134 #define FUNCTION_fixmuldiv2BitExact_DD
fixmuldiv2BitExact_DD(const LONG a,const LONG b)135 inline LONG fixmuldiv2BitExact_DD(const LONG a, const LONG b) {
136 return (LONG)((((INT64)a) * b) >> 32);
137 }
138 #endif
139
140 #if !defined(FUNCTION_fixmul_DD)
141 #define FUNCTION_fixmul_DD
fixmul_DD(const LONG a,const LONG b)142 inline LONG fixmul_DD(const LONG a, const LONG b) {
143 return fixmuldiv2_DD(a, b) << 1;
144 }
145 #endif
146
147 #if !defined(FUNCTION_fixmulBitExact_DD)
148 #define FUNCTION_fixmulBitExact_DD
fixmulBitExact_DD(const LONG a,const LONG b)149 inline LONG fixmulBitExact_DD(const LONG a, const LONG b) {
150 return ((LONG)((((INT64)a) * b) >> 32)) << 1;
151 }
152 #endif
153
154 #if !defined(FUNCTION_fixmuldiv2_SS)
155 #define FUNCTION_fixmuldiv2_SS
fixmuldiv2_SS(const SHORT a,const SHORT b)156 inline LONG fixmuldiv2_SS(const SHORT a, const SHORT b) {
157 return ((LONG)a * b);
158 }
159 #endif
160
161 #if !defined(FUNCTION_fixmul_SS)
162 #define FUNCTION_fixmul_SS
fixmul_SS(const SHORT a,const SHORT b)163 inline LONG fixmul_SS(const SHORT a, const SHORT b) { return (a * b) << 1; }
164 #endif
165
166 #if !defined(FUNCTION_fixmuldiv2_SD)
167 #define FUNCTION_fixmuldiv2_SD
fixmuldiv2_SD(const SHORT a,const LONG b)168 inline LONG fixmuldiv2_SD(const SHORT a, const LONG b)
169 #ifdef FUNCTION_fixmuldiv2_DS
170 {
171 return fixmuldiv2_DS(b, a);
172 }
173 #else
174 {
175 return fixmuldiv2_DD(FX_SGL2FX_DBL(a), b);
176 }
177 #endif
178 #endif
179
180 #if !defined(FUNCTION_fixmuldiv2_DS)
181 #define FUNCTION_fixmuldiv2_DS
fixmuldiv2_DS(const LONG a,const SHORT b)182 inline LONG fixmuldiv2_DS(const LONG a, const SHORT b)
183 #ifdef FUNCTION_fixmuldiv2_SD
184 {
185 return fixmuldiv2_SD(b, a);
186 }
187 #else
188 {
189 return fixmuldiv2_DD(a, FX_SGL2FX_DBL(b));
190 }
191 #endif
192 #endif
193
194 #if !defined(FUNCTION_fixmuldiv2BitExact_SD)
195 #define FUNCTION_fixmuldiv2BitExact_SD
fixmuldiv2BitExact_SD(const SHORT a,const LONG b)196 inline LONG fixmuldiv2BitExact_SD(const SHORT a, const LONG b)
197 #ifdef FUNCTION_fixmuldiv2BitExact_DS
198 {
199 return fixmuldiv2BitExact_DS(b, a);
200 }
201 #else
202 {
203 return (LONG)((((INT64)a) * b) >> 16);
204 }
205 #endif
206 #endif
207
208 #if !defined(FUNCTION_fixmuldiv2BitExact_DS)
209 #define FUNCTION_fixmuldiv2BitExact_DS
fixmuldiv2BitExact_DS(const LONG a,const SHORT b)210 inline LONG fixmuldiv2BitExact_DS(const LONG a, const SHORT b)
211 #ifdef FUNCTION_fixmuldiv2BitExact_SD
212 {
213 return fixmuldiv2BitExact_SD(b, a);
214 }
215 #else
216 {
217 return (LONG)((((INT64)a) * b) >> 16);
218 }
219 #endif
220 #endif
221
222 #if !defined(FUNCTION_fixmul_SD)
223 #define FUNCTION_fixmul_SD
fixmul_SD(const SHORT a,const LONG b)224 inline LONG fixmul_SD(const SHORT a, const LONG b) {
225 #ifdef FUNCTION_fixmul_DS
226 return fixmul_DS(b, a);
227 #else
228 return fixmuldiv2_SD(a, b) << 1;
229 #endif
230 }
231 #endif
232
233 #if !defined(FUNCTION_fixmul_DS)
234 #define FUNCTION_fixmul_DS
fixmul_DS(const LONG a,const SHORT b)235 inline LONG fixmul_DS(const LONG a, const SHORT b) {
236 #ifdef FUNCTION_fixmul_SD
237 return fixmul_SD(b, a);
238 #else
239 return fixmuldiv2_DS(a, b) << 1;
240 #endif
241 }
242 #endif
243
244 #if !defined(FUNCTION_fixmulBitExact_SD)
245 #define FUNCTION_fixmulBitExact_SD
fixmulBitExact_SD(const SHORT a,const LONG b)246 inline LONG fixmulBitExact_SD(const SHORT a, const LONG b)
247 #ifdef FUNCTION_fixmulBitExact_DS
248 {
249 return fixmulBitExact_DS(b, a);
250 }
251 #else
252 {
253 return (LONG)(((((INT64)a) * b) >> 16) << 1);
254 }
255 #endif
256 #endif
257
258 #if !defined(FUNCTION_fixmulBitExact_DS)
259 #define FUNCTION_fixmulBitExact_DS
fixmulBitExact_DS(const LONG a,const SHORT b)260 inline LONG fixmulBitExact_DS(const LONG a, const SHORT b)
261 #ifdef FUNCTION_fixmulBitExact_SD
262 {
263 return fixmulBitExact_SD(b, a);
264 }
265 #else
266 {
267 return (LONG)(((((INT64)a) * b) >> 16) << 1);
268 }
269 #endif
270 #endif
271
272 #if !defined(FUNCTION_fixpow2div2_D)
273 #define FUNCTION_fixpow2div2_D
fixpow2div2_D(const LONG a)274 inline LONG fixpow2div2_D(const LONG a) { return fixmuldiv2_DD(a, a); }
275 #endif
276
277 #if !defined(FUNCTION_fixpow2_D)
278 #define FUNCTION_fixpow2_D
fixpow2_D(const LONG a)279 inline LONG fixpow2_D(const LONG a) { return fixpow2div2_D(a) << 1; }
280 #endif
281
282 #if !defined(FUNCTION_fixpow2div2_S)
283 #define FUNCTION_fixpow2div2_S
fixpow2div2_S(const SHORT a)284 inline LONG fixpow2div2_S(const SHORT a) { return fixmuldiv2_SS(a, a); }
285 #endif
286
287 #if !defined(FUNCTION_fixpow2_S)
288 #define FUNCTION_fixpow2_S
fixpow2_S(const SHORT a)289 inline LONG fixpow2_S(const SHORT a) {
290 LONG result = fixpow2div2_S(a) << 1;
291 return result ^ (result >> 31);
292 }
293 #endif
294
295 #endif /* FIXMUL_H */
296