typedefs.h

这是一个平台无关的标准C的AMR解码库

/*
********************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
*                                R99   Version 3.3.0                
*                                REL-4 Version 4.1.0                
*
********************************************************************************
*
*      File             : typedefs.h
*      Description      : Definition of platform independent data
*                         types and constants
*
*
*      The following platform independent data types and corresponding
*      preprocessor (#define) constants are defined:
*
*        defined type  meaning           corresponding constants
*        ----------------------------------------------------------
*        Char          character         (none)
*        Bool          boolean           true, false
*        Word8         8-bit signed      minWord8,   maxWord8
*        UWord8        8-bit unsigned    minUWord8,  maxUWord8
*        Word16        16-bit signed     minWord16,  maxWord16
*        UWord16       16-bit unsigned   minUWord16, maxUWord16
*        Word32        32-bit signed     minWord32,  maxWord32
*        UWord32       32-bit unsigned   minUWord32, maxUWord32
*        Float         floating point    minFloat,   maxFloat
*
*
*      The following compile switches are #defined:
*
*        PLATFORM      string indicating platform progam is compiled on
*                      possible values: "OSF", "PC", "SUN"
*
*        OSF           only defined if the current platform is an Alpha
*        PC            only defined if the current platform is a PC
*        SUN           only defined if the current platform is a Sun
*        
*        LSBFIRST      is defined if the byte order on this platform is
*                      "least significant byte first" -> defined on DEC Alpha
*                      and PC, undefined on Sun
*
********************************************************************************
*/
#ifndef typedefs_h
#define typedefs_h "$Id $"

/*
********************************************************************************
*                         INCLUDE FILES
********************************************************************************
*/
//#include <float.h>
//#include <limits.h>



/*
********************************************************************************
*                         DEFINITION OF CONSTANTS 
********************************************************************************
*/
/*
 ********* define char type
 */
typedef char Char;

/*
 ********* define 8 bit signed/unsigned types & constants
 */
typedef signed char Word8;
#define minWord8  (-128)
#define maxWord8  127

typedef unsigned char UWord8;
#define minUWord8 0
#define maxUWord8 0xff


/*
 ********* define 16 bit signed/unsigned types & constants
 */
typedef short Word16;
#define minWord16     (-32768)        /* minimum (signed) short value */
#define maxWord16     32767         /* maximum (signed) short value */
typedef unsigned short UWord16;
#define minUWord16    0
#define maxUWord16    0xffff        /* maximum unsigned short value */

/*
 ********* define 32 bit signed/unsigned types & constants
 */
typedef int Word32;
#define minWord32     (-2147483647 - 1) /* minimum (signed) int value */
#define maxWord32     2147483647    /* maximum (signed) int value */
typedef unsigned int UWord32;
#define minUWord32    0
#define maxUWord32    0xffffffff    /* maximum unsigned int value */

/*
 ********* define floating point type & constants
 */
/* use "#if 0" below if Float should be double;
   use "#if 1" below if Float should be float
 */
typedef double Float;
#define maxFloat      1.7976931348623158e+308 /* max value */
#define minFloat      2.2250738585072014e-308 /* min positive value */

/*
 ********* define complex type
 */
typedef struct {
  Float r;  /* real      part */
  Float i;  /* imaginary part */
} CPX;

/*
 ********* define boolean type
 */
typedef int Bool;
#define false 0
#define true 1

/*
 ********* Check current platform
 */
#if defined(__MSDOS__)
#define PC
#define PLATFORM "PC"
#define LSBFIRST
#elif defined(__osf__)
#define OSF
#define PLATFORM "OSF"
#define LSBFIRST
#elif defined(__sun__) || defined(__sun)
#define SUN
#define PLATFORM "SUN"
#undef LSBFIRST
#elif defined(linux) && defined(i386)
#define PC
#define PLATFORM "PC"
#define LSBFIRST
#else
#error "can't determine architecture; adapt typedefs.h to your platform"
#endif

#endif