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      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Frderung 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 (at) 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
    118 void __aeabi_memcpy(void *dest, void *src, int size)
    119 {
    120   memcpy(dest, src, size);
    121 }
    122 void __aeabi_memcpy4(void *dest, void *src, int size)
    123 {
    124   memcpy(dest, src, size);
    125 }
    126 void __aeabi_memmove4(void *dest, void *src, int size)
    127 {
    128   memmove(dest, src, size);
    129 }
    130 void __aeabi_memclr(void *ptr, int size)
    131 {
    132   memset(ptr, 0, size);
    133 }
    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;
    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 
    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 
    241 static inline void * getSram(void)
    242 {
    243   return FDKaalloc(KERNEL_SRAM_SIZE, 8);
    244 }
    245 static inline void * freeSram(void* ptr)
    246 {
    247   FDKafree(ptr);
    248 }
    249 
    250 #endif
    251 
    252 
    253 #ifdef FUNCTION_FDKprolog
    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
    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