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freeswitch/libs/libsndfile/src/sfendian.h

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/*
** Copyright (C) 1999-2013 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef SFENDIAN_INCLUDED
#define SFENDIAN_INCLUDED
#include "sfconfig.h"
#include <stdint.h>
#ifndef WIN32
#include <inttypes.h>
#endif
#if COMPILER_IS_GCC && CPU_IS_X86
static inline int16_t
ENDSWAP_16 (int16_t x)
{ int16_t y ;
__asm__ ("rorw $8, %w0" : "=r" (y) : "0" (x) : "cc") ;
return y ;
} /* ENDSWAP_16 */
static inline int32_t
ENDSWAP_32 (int32_t x)
{ int32_t y ;
__asm__ ("bswap %0" : "=r" (y) : "0" (x)) ;
return y ;
} /* ENDSWAP_32 */
#if CPU_IS_X86_64
static inline int64_t
ENDSWAP_64X (int64_t x)
{ int64_t y ;
__asm__ ("bswap %q0" : "=r" (y) : "0" (x)) ;
return y ;
} /* ENDSWAP_64X */
#define ENDSWAP_64 ENDSWAP_64X
#endif
#elif HAVE_BYTESWAP_H /* Linux, any CPU */
#include <byteswap.h>
#define ENDSWAP_16(x) (bswap_16 (x))
#define ENDSWAP_32(x) (bswap_32 (x))
#define ENDSWAP_64(x) (bswap_64 (x))
#else
#define ENDSWAP_16(x) ((((x) >> 8) & 0xFF) + (((x) & 0xFF) << 8))
#define ENDSWAP_32(x) ((((x) >> 24) & 0xFF) + (((x) >> 8) & 0xFF00) + (((x) & 0xFF00) << 8) + (((x) & 0xFF) << 24))
#endif
#ifndef ENDSWAP_64
static inline uint64_t
ENDSWAP_64 (uint64_t x)
{ union
{ uint32_t parts [2] ;
uint64_t whole ;
} u ;
uint32_t temp ;
u.whole = x ;
temp = u.parts [0] ;
u.parts [0] = ENDSWAP_32 (u.parts [1]) ;
u.parts [1] = ENDSWAP_32 (temp) ;
return u.whole ;
}
#endif
/*
** Many file types (ie WAV, AIFF) use sets of four consecutive bytes as a
** marker indicating different sections of the file.
** The following MAKE_MARKER macro allows th creation of integer constants
** for these markers.
*/
#if (CPU_IS_LITTLE_ENDIAN == 1)
#define MAKE_MARKER(a, b, c, d) ((uint32_t) ((a) | ((b) << 8) | ((c) << 16) | (((uint32_t) (d)) << 24)))
#elif (CPU_IS_BIG_ENDIAN == 1)
#define MAKE_MARKER(a, b, c, d) ((uint32_t) ((((uint32_t) (a)) << 24) | ((b) << 16) | ((c) << 8) | (d)))
#else
#error "Target CPU endian-ness unknown. May need to hand edit src/sfconfig.h"
#endif
/*
** Macros to handle reading of data of a specific endian-ness into host endian
** shorts and ints. The single input is an unsigned char* pointer to the start
** of the object. There are two versions of each macro as we need to deal with
** both big and little endian CPUs.
*/
#if (CPU_IS_LITTLE_ENDIAN == 1)
#define LE2H_16(x) (x)
#define LE2H_32(x) (x)
#define BE2H_16(x) ENDSWAP_16 (x)
#define BE2H_32(x) ENDSWAP_32 (x)
#define BE2H_64(x) ENDSWAP_64 (x)
#define H2BE_16(x) ENDSWAP_16 (x)
#define H2BE_32(x) ENDSWAP_32 (x)
#elif (CPU_IS_BIG_ENDIAN == 1)
#define LE2H_16(x) ENDSWAP_16 (x)
#define LE2H_32(x) ENDSWAP_32 (x)
#define BE2H_16(x) (x)
#define BE2H_32(x) (x)
#define BE2H_64(x) (x)
#define H2BE_16(x) (x)
#define H2BE_32(x) (x)
#define H2LE_16(x) ENDSWAP_16 (x)
#define H2LE_32(x) ENDSWAP_32 (x)
#else
#error "Target CPU endian-ness unknown. May need to hand edit src/sfconfig.h"
#endif
#define LET2H_16_PTR(x) ((x) [1] + ((x) [2] << 8))
#define LET2H_32_PTR(x) (((x) [0] << 8) + ((x) [1] << 16) + ((x) [2] << 24))
#define BET2H_16_PTR(x) (((x) [0] << 8) + (x) [1])
#define BET2H_32_PTR(x) (((x) [0] << 24) + ((x) [1] << 16) + ((x) [2] << 8))
static inline void
psf_put_be64 (uint8_t *ptr, int offset, int64_t value)
{
ptr [offset] = value >> 56 ;
ptr [offset + 1] = value >> 48 ;
ptr [offset + 2] = value >> 40 ;
ptr [offset + 3] = value >> 32 ;
ptr [offset + 4] = value >> 24 ;
ptr [offset + 5] = value >> 16 ;
ptr [offset + 6] = value >> 8 ;
ptr [offset + 7] = value ;
} /* psf_put_be64 */
static inline void
psf_put_be32 (uint8_t *ptr, int offset, int32_t value)
{
ptr [offset] = value >> 24 ;
ptr [offset + 1] = value >> 16 ;
ptr [offset + 2] = value >> 8 ;
ptr [offset + 3] = value ;
} /* psf_put_be32 */
static inline void
psf_put_be16 (uint8_t *ptr, int offset, int16_t value)
{
ptr [offset] = value >> 8 ;
ptr [offset + 1] = value ;
} /* psf_put_be16 */
static inline int64_t
psf_get_be64 (uint8_t *ptr, int offset)
{ int64_t value ;
value = ptr [offset] << 24 ;
value += ptr [offset + 1] << 16 ;
value += ptr [offset + 2] << 8 ;
value += ptr [offset + 3] ;
value <<= 32 ;
value += ptr [offset + 4] << 24 ;
value += ptr [offset + 5] << 16 ;
value += ptr [offset + 6] << 8 ;
value += ptr [offset + 7] ;
return value ;
} /* psf_get_be64 */
static inline int32_t
psf_get_be32 (uint8_t *ptr, int offset)
{ int32_t value ;
value = ptr [offset] << 24 ;
value += ptr [offset + 1] << 16 ;
value += ptr [offset + 2] << 8 ;
value += ptr [offset + 3] ;
return value ;
} /* psf_get_be32 */
static inline int16_t
psf_get_be16 (uint8_t *ptr, int offset)
{ return (ptr [offset] << 8) + ptr [offset + 1] ;
} /* psf_get_be16 */
/*-----------------------------------------------------------------------------------------------
** Generic functions for performing endian swapping on integer arrays.
*/
static inline void
endswap_short_array (short *ptr, int len)
{ short temp ;
while (--len >= 0)
{ temp = ptr [len] ;
ptr [len] = ENDSWAP_16 (temp) ;
} ;
} /* endswap_short_array */
static inline void
endswap_short_copy (short *dest, const short *src, int len)
{
while (--len >= 0)
{ dest [len] = ENDSWAP_16 (src [len]) ;
} ;
} /* endswap_short_copy */
static inline void
endswap_int_array (int *ptr, int len)
{ int temp ;
while (--len >= 0)
{ temp = ptr [len] ;
ptr [len] = ENDSWAP_32 (temp) ;
} ;
} /* endswap_int_array */
static inline void
endswap_int_copy (int *dest, const int *src, int len)
{
while (--len >= 0)
{ dest [len] = ENDSWAP_32 (src [len]) ;
} ;
} /* endswap_int_copy */
/*========================================================================================
*/
static inline void
endswap_int64_t_array (int64_t *ptr, int len)
{ int64_t value ;
while (--len >= 0)
{ value = ptr [len] ;
ptr [len] = ENDSWAP_64 (value) ;
} ;
} /* endswap_int64_t_array */
static inline void
endswap_int64_t_copy (int64_t *dest, const int64_t *src, int len)
{ int64_t value ;
while (--len >= 0)
{ value = src [len] ;
dest [len] = ENDSWAP_64 (value) ;
} ;
} /* endswap_int64_t_copy */
/* A couple of wrapper functions. */
static inline void
endswap_float_array (float *ptr, int len)
{ endswap_int_array ((int *) ptr, len) ;
} /* endswap_float_array */
static inline void
endswap_double_array (double *ptr, int len)
{ endswap_int64_t_array ((int64_t *) ptr, len) ;
} /* endswap_double_array */
static inline void
endswap_float_copy (float *dest, const float *src, int len)
{ endswap_int_copy ((int *) dest, (const int *) src, len) ;
} /* endswap_float_copy */
static inline void
endswap_double_copy (double *dest, const double *src, int len)
{ endswap_int64_t_copy ((int64_t *) dest, (const int64_t *) src, len) ;
} /* endswap_double_copy */
#endif /* SFENDIAN_INCLUDED */
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