1
2 /* -----------------------------------------------------------------------------------------------------------
3 Software 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
9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
12
13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
16 of the MPEG specifications.
17
18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
20 individually for the purpose of encoding or decoding bit streams in products that are compliant with
21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
23 software may already be covered under those patent licenses when it is used for those licensed purposes only.
24
25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
27 applications information and documentation.
28
29 2. COPYRIGHT LICENSE
30
31 Redistribution and use in source and binary forms, with or without modification, are permitted without
32 payment of copyright license fees provided that you satisfy the following conditions:
33
34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
35 your modifications thereto in source code form.
36
37 You must retain the complete text of this software license in the documentation and/or other materials
38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
40 modifications thereto to recipients of copies in binary form.
41
42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
43 prior written permission.
44
45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
46 software or your modifications thereto.
47
48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
49 and 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
53 3. NO PATENT LICENSE
54
55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
57 respect to this software.
58
59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
60 by appropriate patent licenses.
61
62 4. DISCLAIMER
63
64 This 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
66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
69 or business interruption, however caused and on any theory of liability, whether in contract, strict
70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
71 advised of the possibility of such damage.
72
73 5. CONTACT INFORMATION
74
75 Fraunhofer Institute for Integrated Circuits IIS
76 Attention: Audio and Multimedia Departments - FDK AAC LL
77 Am Wolfsmantel 33
78 91058 Erlangen, Germany
79
80 www.iis.fraunhofer.de/amm
81 amm-info@iis.fraunhofer.de
82 ----------------------------------------------------------------------------------------------------------- */
83
84 /************************** Fraunhofer IIS FDK SysLib **********************
85
86 Author(s): Manuel Jander
87 Description: Linux genericStds (mostly kernel SRAM driver bindings)
88
89 ******************************************************************************/
90
91
92 /*
93 * NOTE: it makes only sense to enable this if you also have the corresponding
94 * GNU/Linux kernel driver to access fast SRAM.
95 */
96 #if defined(__arm__) /* || defined(__mips__) */
97
98 /**
99 * EABI static linking problem workaround
100 *
101 * These function are normally present in libc.a but
102 * apparently can be linked only statically.
103 * While using C++ (iisisoff) that is a problem,
104 * because it wont work (static global constructors
105 * cause problems with static linked programs).
106 * So the workaround is to include those functions here,
107 * because libSYS.a is linked statically, and libc can be
108 * linked dynamically as usual.
109 *
110 * Add more EABI functions here if you get unresolved
111 * symbols of EABI functions.
112 */
113 #include <string.h>
114
115 #ifdef __cplusplus
116 extern "C" {
117 #endif
__aeabi_memcpy(void * dest,void * src,int size)118 void __aeabi_memcpy(void *dest, void *src, int size)
119 {
120 memcpy(dest, src, size);
121 }
__aeabi_memcpy4(void * dest,void * src,int size)122 void __aeabi_memcpy4(void *dest, void *src, int size)
123 {
124 memcpy(dest, src, size);
125 }
__aeabi_memmove4(void * dest,void * src,int size)126 void __aeabi_memmove4(void *dest, void *src, int size)
127 {
128 memmove(dest, src, size);
129 }
__aeabi_memclr(void * ptr,int size)130 void __aeabi_memclr(void *ptr, int size)
131 {
132 memset(ptr, 0, size);
133 }
__aeabi_memclr4(void * ptr,int size)134 void __aeabi_memclr4(void *ptr, int size)
135 {
136 memset(ptr, 0, size);
137 }
138 #ifdef __cplusplus
139 }
140 #endif
141
142 /* Include Linux kernel config, or set ARCH and processor macros directly */
143 /*
144 #define CONFIG_ARCH_MXC
145 #define CONFIG_ARCH_MX25
146 */
147
148 #if defined(CONFIG_ARCH_OMAP3)
149 #define KERNEL_SRAM_SIZE 65536
150 #elif defined(CONFIG_ARCH_MX31)
151 #define KERNEL_SRAM_SIZE 16384
152 #elif defined(CONFIG_ARCH_MX25)
153 #define KERNEL_SRAM_SIZE 131072
154 #elif defined(CONFIG_ARCH_MX35)
155 #define KERNEL_SRAM_SIZE 131072
156 #else
157 #define KERNEL_SRAM_SIZE 0
158 #endif
159
160 #if (KERNEL_SRAM_SIZE > 0)
161 #define KERNEL_SCRATCH_SIZE (4096)
162 #define FDK_SCRATCHBUF_SIZE (KERNEL_SCRATCH_SIZE/sizeof(INT))
163 #define DATA_L1_A_SIZE (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE)
164
165 #define RESOURCE_scratchBuffer
166 #define FUNCTION_FDKprolog
167 #define FUNCTION_FDKepilog
168
169 static unsigned char *L1_DATA_A=NULL;
170 static unsigned char *_a=NULL;
171
172
173 #ifdef RESOURCE_scratchBuffer
174 static INT *__scratchBuffer;
175 static unsigned char *__pScratchBuffer = NULL;
176 #endif
177
178
179 #ifdef __linux__
180
181 #include <stdio.h>
182 #include <sys/mman.h>
183 #include <sys/types.h>
184 #include <sys/stat.h>
185 #include <fcntl.h>
186 #include <unistd.h>
187
188 static int fd;
getSram(void)189 static inline void * getSram(void)
190 {
191 unsigned long *ptr = NULL;
192
193 /* Open driver */
194 fd = open("/dev/sram", 0);
195 if (fd < 0)
196 {
197 printf("Unable to open /dev/sram. Fallback to malloc\n");
198 /* Signal "no sram driver at use". */
199 fd = -1;
200 /* Return malloced pointer (fallback) */
201 return FDKaalloc(KERNEL_SRAM_SIZE, 8);
202 }
203
204 /* Get memory mapped into CPU (virtual) address space */
205 ptr = (unsigned long *)mmap(NULL, KERNEL_SRAM_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
206 if(ptr == MAP_FAILED)
207 {
208 printf("Unable to mmap(). Fallback to malloc\n");
209 /* Give up on the sram driver */
210 close(fd);
211 /* Signal "no sram driver at use". */
212 fd = -1;
213 /* Return malloced pointer (fallback) */
214 ptr = (unsigned long *)FDKaalloc(KERNEL_SRAM_SIZE, 8);
215 }
216
217
218 /* Return pointer to sram */
219 return (void*)ptr;
220 }
221
freeSram(void * ptr)222 static inline void freeSram(void* ptr)
223 {
224 /* Check if sram driver is being used. */
225 if (fd == -1)
226 {
227 FDKafree(ptr);
228 return;
229 }
230
231 /* Unmap memory */
232 munmap(ptr, KERNEL_SRAM_SIZE);
233 /* Close driver */
234 close(fd);
235
236 return;
237 }
238
239 #else
240
getSram(void)241 static inline void * getSram(void)
242 {
243 return FDKaalloc(KERNEL_SRAM_SIZE, 8);
244 }
freeSram(void * ptr)245 static inline void * freeSram(void* ptr)
246 {
247 FDKafree(ptr);
248 }
249
250 #endif
251
252
253 #ifdef FUNCTION_FDKprolog
FDKprolog(void)254 void FDKprolog(void)
255 {
256 unsigned char *addr = (unsigned char*)getSram();
257
258
259 if (addr == NULL)
260 {
261 printf("SRAM allocation failed ! This is fatal.\n");
262 exit(-1);
263 }
264
265 #ifdef RESOURCE_scratchBuffer
266 __scratchBuffer = (INT*) ( addr + (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE) );
267 __pScratchBuffer = addr + (KERNEL_SRAM_SIZE);
268 #endif
269
270 printf("SRAM @ 0x%08x\n", (unsigned int) addr);
271 atexit(FDKepilog);
272
273 FDKprolog_generic();
274 }
275 #endif
276
277 #ifdef FUNCTION_FDKepilog
FDKepilog(void)278 void FDKepilog(void)
279 {
280 /* Because of atexit(), make sure to call this only once */
281 if (L1_DATA_A != NULL)
282 {
283 freeSram(L1_DATA_A);
284 L1_DATA_A = NULL;
285
286 FDKepilog_generic();
287 }
288 }
289 #endif
290
291 #endif /* KERNEL_SRAM > 0 */
292
293 #endif /* ifdef __arm__ */
294
295