libSYS/src/linux/genericStds_linux.cpp

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung 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.
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  46 software or your modifications thereto.
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  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."
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  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
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  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
 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