Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 232 insertions, 0 deletions

diff --git a/libSYS/src/linux/genericStds_linux.cpp b/libSYS/src/linux/genericStds_linux.cpp
new file mode 100644
index 0000000..ce10f9c
--- /dev/null
+++ b/libSYS/src/linux/genericStds_linux.cpp
@@ -0,0 +1,232 @@
+/**************************  Fraunhofer IIS FDK SysLib  **********************
+
+                        (C) Copyright Fraunhofer IIS (2006)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Manuel Jander
+   Description: Linux genericStds (mostly kernel SRAM driver bindings)
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+
+/*
+ * NOTE: it makes only sense to enable this if you also have the corresponding
+ * GNU/Linux kernel driver to access fast SRAM.
+ */
+#if defined(__arm__) /* || defined(__mips__) */
+
+/**
+ * EABI static linking problem workaround
+ *
+ * These function are normally present in libc.a but
+ * apparently can be linked only statically.
+ * While using C++ (iisisoff) that is a problem,
+ * because it wont work (static global constructors
+ * cause problems with static linked programs).
+ * So the workaround is to include those functions here,
+ * because libSYS.a is linked statically, and libc can be
+ * linked dynamically as usual.
+ *
+ * Add more EABI functions here if you get unresolved
+ * symbols of EABI functions.
+ */
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void __aeabi_memcpy(void *dest, void *src, int size)
+{
+  memcpy(dest, src, size);
+}
+void __aeabi_memcpy4(void *dest, void *src, int size)
+{
+  memcpy(dest, src, size);
+}
+void __aeabi_memmove4(void *dest, void *src, int size)
+{
+  memmove(dest, src, size);
+}
+void __aeabi_memclr(void *ptr, int size)
+{
+  memset(ptr, 0, size);
+}
+void __aeabi_memclr4(void *ptr, int size)
+{
+  memset(ptr, 0, size);
+}
+#ifdef __cplusplus
+}
+#endif
+
+/* Include Linux kernel config, or set ARCH and processor macros directly */
+/*
+#define CONFIG_ARCH_MXC
+#define CONFIG_ARCH_MX25
+*/
+
+#if defined(CONFIG_ARCH_OMAP3)
+#define KERNEL_SRAM_SIZE       65536
+#elif defined(CONFIG_ARCH_MX31)
+#define KERNEL_SRAM_SIZE       16384
+#elif defined(CONFIG_ARCH_MX25)
+#define KERNEL_SRAM_SIZE      131072
+#elif defined(CONFIG_ARCH_MX35)
+#define KERNEL_SRAM_SIZE      131072
+#else
+#define KERNEL_SRAM_SIZE 0
+#endif
+
+#if (KERNEL_SRAM_SIZE > 0)
+#define KERNEL_SCRATCH_SIZE (4096)
+#define FDK_SCRATCHBUF_SIZE (KERNEL_SCRATCH_SIZE/sizeof(INT))
+#define DATA_L1_A_SIZE (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE)
+
+#define RESOURCE_scratchBuffer
+#define FUNCTION_FDKprolog
+#define FUNCTION_FDKepilog
+
+static unsigned char *L1_DATA_A=NULL;
+static unsigned char *_a=NULL;
+
+
+#ifdef RESOURCE_scratchBuffer
+static INT *__scratchBuffer;
+static unsigned char *__pScratchBuffer = NULL;
+#endif
+
+
+#ifdef __linux__
+
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static int fd;
+static inline void * getSram(void)
+{
+  unsigned long *ptr = NULL;
+
+  /* Open driver */
+  fd = open("/dev/sram", 0);
+  if (fd < 0)
+  {
+    printf("Unable to open /dev/sram. Fallback to malloc\n");
+    /* Signal "no sram driver at use". */
+    fd = -1;
+    /* Return malloced pointer (fallback) */
+    return FDKaalloc(KERNEL_SRAM_SIZE, 8);
+  }
+
+  /* Get memory mapped into CPU (virtual) address space */
+  ptr = (unsigned long *)mmap(NULL, KERNEL_SRAM_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+  if(ptr == MAP_FAILED)
+  {
+     printf("Unable to mmap(). Fallback to malloc\n");
+     /* Give up on the sram driver */
+     close(fd);
+     /* Signal "no sram driver at use". */
+     fd = -1;
+     /* Return malloced pointer (fallback) */
+     ptr = (unsigned long *)FDKaalloc(KERNEL_SRAM_SIZE, 8);
+  }
+
+
+  /* Return pointer to sram */
+  return (void*)ptr;
+}
+
+static inline void freeSram(void* ptr)
+{
+  /* Check if sram driver is being used. */
+  if (fd == -1)
+  {
+    FDKafree(ptr);
+    return;
+  }
+
+  /* Unmap memory */
+  munmap(ptr, KERNEL_SRAM_SIZE);
+  /* Close driver */
+  close(fd);
+
+  return;
+}
+
+#else
+
+static inline void * getSram(void)
+{
+  return FDKaalloc(KERNEL_SRAM_SIZE, 8);
+}
+static inline void * freeSram(void* ptr)
+{
+  FDKafree(ptr);
+}
+
+#endif
+
+
+#ifdef FUNCTION_FDKprolog
+void FDKprolog(void)
+{
+   unsigned char *addr = (unsigned char*)getSram();
+
+
+   if (addr == NULL)
+   {
+     printf("SRAM allocation failed ! This is fatal.\n");
+     exit(-1);
+   }
+
+#ifdef RESOURCE_scratchBuffer
+   __scratchBuffer = (INT*) ( addr + (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE) );
+   __pScratchBuffer = addr + (KERNEL_SRAM_SIZE);
+#endif
+
+   printf("SRAM @ 0x%08x\n", (unsigned int) addr);
+   atexit(FDKepilog);
+
+   FDKprolog_generic();
+}
+#endif
+
+#ifdef FUNCTION_FDKepilog
+void FDKepilog(void)
+{
+   /* Because of atexit(), make sure to call this only once */
+   if (L1_DATA_A != NULL)
+   {
+     freeSram(L1_DATA_A);
+     L1_DATA_A = NULL;
+
+     FDKepilog_generic();
+   }
+}
+#endif
+
+#endif /* KERNEL_SRAM > 0 */
+
+#endif /* ifdef __arm__ */
+