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freeswitch/libs/libsndfile/src/double64.c

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/*
** Copyright (C) 1999-2009 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.
*/
#include "sfconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <math.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
#if CPU_IS_LITTLE_ENDIAN
#define DOUBLE64_READ double64_le_read
#define DOUBLE64_WRITE double64_le_write
#elif CPU_IS_BIG_ENDIAN
#define DOUBLE64_READ double64_be_read
#define DOUBLE64_WRITE double64_be_write
#endif
/* A 32 number which will not overflow when multiplied by sizeof (double). */
#define SENSIBLE_LEN (0x8000000)
/*--------------------------------------------------------------------------------------------
** Processor floating point capabilities. double64_get_capability () returns one of the
** latter three values.
*/
enum
{ DOUBLE_UNKNOWN = 0x00,
DOUBLE_CAN_RW_LE = 0x23,
DOUBLE_CAN_RW_BE = 0x34,
DOUBLE_BROKEN_LE = 0x45,
DOUBLE_BROKEN_BE = 0x56
} ;
/*--------------------------------------------------------------------------------------------
** Prototypes for private functions.
*/
static sf_count_t host_read_d2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
static sf_count_t host_read_d2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
static sf_count_t host_read_d2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
static sf_count_t host_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
static sf_count_t host_write_s2d (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
static sf_count_t host_write_i2d (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
static sf_count_t host_write_f2d (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
static sf_count_t host_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
static void double64_peak_update (SF_PRIVATE *psf, const double *buffer, int count, sf_count_t indx) ;
static int double64_get_capability (SF_PRIVATE *psf) ;
static sf_count_t replace_read_d2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
static sf_count_t replace_read_d2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
static sf_count_t replace_read_d2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
static sf_count_t replace_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
static sf_count_t replace_write_s2d (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
static sf_count_t replace_write_i2d (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
static sf_count_t replace_write_f2d (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
static sf_count_t replace_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
static void d2bd_read (double *buffer, int count) ;
static void bd2d_write (double *buffer, int count) ;
/*--------------------------------------------------------------------------------------------
** Exported functions.
*/
int
double64_init (SF_PRIVATE *psf)
{ static int double64_caps ;
double64_caps = double64_get_capability (psf) ;
psf->blockwidth = sizeof (double) * psf->sf.channels ;
if (psf->mode == SFM_READ || psf->mode == SFM_RDWR)
{ switch (psf->endian + double64_caps)
{ case (SF_ENDIAN_BIG + DOUBLE_CAN_RW_BE) :
psf->data_endswap = SF_FALSE ;
psf->read_short = host_read_d2s ;
psf->read_int = host_read_d2i ;
psf->read_float = host_read_d2f ;
psf->read_double = host_read_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_CAN_RW_LE) :
psf->data_endswap = SF_FALSE ;
psf->read_short = host_read_d2s ;
psf->read_int = host_read_d2i ;
psf->read_float = host_read_d2f ;
psf->read_double = host_read_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_CAN_RW_LE) :
psf->data_endswap = SF_TRUE ;
psf->read_short = host_read_d2s ;
psf->read_int = host_read_d2i ;
psf->read_float = host_read_d2f ;
psf->read_double = host_read_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_CAN_RW_BE) :
psf->data_endswap = SF_TRUE ;
psf->read_short = host_read_d2s ;
psf->read_int = host_read_d2i ;
psf->read_float = host_read_d2f ;
psf->read_double = host_read_d ;
break ;
/* When the CPU is not IEEE compatible. */
case (SF_ENDIAN_BIG + DOUBLE_BROKEN_BE) :
psf->data_endswap = SF_FALSE ;
psf->read_short = replace_read_d2s ;
psf->read_int = replace_read_d2i ;
psf->read_float = replace_read_d2f ;
psf->read_double = replace_read_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_BROKEN_LE) :
psf->data_endswap = SF_FALSE ;
psf->read_short = replace_read_d2s ;
psf->read_int = replace_read_d2i ;
psf->read_float = replace_read_d2f ;
psf->read_double = replace_read_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_BROKEN_LE) :
psf->data_endswap = SF_TRUE ;
psf->read_short = replace_read_d2s ;
psf->read_int = replace_read_d2i ;
psf->read_float = replace_read_d2f ;
psf->read_double = replace_read_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_BROKEN_BE) :
psf->data_endswap = SF_TRUE ;
psf->read_short = replace_read_d2s ;
psf->read_int = replace_read_d2i ;
psf->read_float = replace_read_d2f ;
psf->read_double = replace_read_d ;
break ;
default : break ;
} ;
} ;
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
{ switch (psf->endian + double64_caps)
{ case (SF_ENDIAN_LITTLE + DOUBLE_CAN_RW_LE) :
psf->data_endswap = SF_FALSE ;
psf->write_short = host_write_s2d ;
psf->write_int = host_write_i2d ;
psf->write_float = host_write_f2d ;
psf->write_double = host_write_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_CAN_RW_BE) :
psf->data_endswap = SF_FALSE ;
psf->write_short = host_write_s2d ;
psf->write_int = host_write_i2d ;
psf->write_float = host_write_f2d ;
psf->write_double = host_write_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_CAN_RW_LE) :
psf->data_endswap = SF_TRUE ;
psf->write_short = host_write_s2d ;
psf->write_int = host_write_i2d ;
psf->write_float = host_write_f2d ;
psf->write_double = host_write_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_CAN_RW_BE) :
psf->data_endswap = SF_TRUE ;
psf->write_short = host_write_s2d ;
psf->write_int = host_write_i2d ;
psf->write_float = host_write_f2d ;
psf->write_double = host_write_d ;
break ;
/* When the CPU is not IEEE compatible. */
case (SF_ENDIAN_LITTLE + DOUBLE_BROKEN_LE) :
psf->data_endswap = SF_FALSE ;
psf->write_short = replace_write_s2d ;
psf->write_int = replace_write_i2d ;
psf->write_float = replace_write_f2d ;
psf->write_double = replace_write_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_BROKEN_BE) :
psf->data_endswap = SF_FALSE ;
psf->write_short = replace_write_s2d ;
psf->write_int = replace_write_i2d ;
psf->write_float = replace_write_f2d ;
psf->write_double = replace_write_d ;
break ;
case (SF_ENDIAN_BIG + DOUBLE_BROKEN_LE) :
psf->data_endswap = SF_TRUE ;
psf->write_short = replace_write_s2d ;
psf->write_int = replace_write_i2d ;
psf->write_float = replace_write_f2d ;
psf->write_double = replace_write_d ;
break ;
case (SF_ENDIAN_LITTLE + DOUBLE_BROKEN_BE) :
psf->data_endswap = SF_TRUE ;
psf->write_short = replace_write_s2d ;
psf->write_int = replace_write_i2d ;
psf->write_float = replace_write_f2d ;
psf->write_double = replace_write_d ;
break ;
default : break ;
} ;
} ;
if (psf->filelength > psf->dataoffset)
{ psf->datalength = (psf->dataend > 0) ? psf->dataend - psf->dataoffset :
psf->filelength - psf->dataoffset ;
}
else
psf->datalength = 0 ;
psf->sf.frames = psf->datalength / psf->blockwidth ;
return 0 ;
} /* double64_init */
/*----------------------------------------------------------------------------
** From : http://www.hpcf.cam.ac.uk/fp_formats.html
**
** 64 bit double precision layout (big endian)
** Sign bit 0
** Exponent bits 1-11
** Mantissa bits 12-63
** Exponent Offset 1023
**
** double single
**
** +INF 7FF0000000000000 7F800000
** -INF FFF0000000000000 FF800000
** NaN 7FF0000000000001 7F800001
** to to
** 7FFFFFFFFFFFFFFF 7FFFFFFF
** and and
** FFF0000000000001 FF800001
** to to
** FFFFFFFFFFFFFFFF FFFFFFFF
** +OVER 7FEFFFFFFFFFFFFF 7F7FFFFF
** -OVER FFEFFFFFFFFFFFFF FF7FFFFF
** +UNDER 0010000000000000 00800000
** -UNDER 8010000000000000 80800000
*/
double
double64_be_read (unsigned char *cptr)
{ int exponent, negative, upper, lower ;
double dvalue ;
negative = (cptr [0] & 0x80) ? 1 : 0 ;
exponent = ((cptr [0] & 0x7F) << 4) | ((cptr [1] >> 4) & 0xF) ;
/* Might not have a 64 bit long, so load the mantissa into a double. */
upper = (((cptr [1] & 0xF) << 24) | (cptr [2] << 16) | (cptr [3] << 8) | cptr [4]) ;
lower = (cptr [5] << 16) | (cptr [6] << 8) | cptr [7] ;
if (exponent == 0 && upper == 0 && lower == 0)
return 0.0 ;
dvalue = upper + lower / ((double) 0x1000000) ;
dvalue += 0x10000000 ;
exponent = exponent - 0x3FF ;
dvalue = dvalue / ((double) 0x10000000) ;
if (negative)
dvalue *= -1 ;
if (exponent > 0)
dvalue *= pow (2.0, exponent) ;
else if (exponent < 0)
dvalue /= pow (2.0, abs (exponent)) ;
return dvalue ;
} /* double64_be_read */
double
double64_le_read (unsigned char *cptr)
{ int exponent, negative, upper, lower ;
double dvalue ;
negative = (cptr [7] & 0x80) ? 1 : 0 ;
exponent = ((cptr [7] & 0x7F) << 4) | ((cptr [6] >> 4) & 0xF) ;
/* Might not have a 64 bit long, so load the mantissa into a double. */
upper = ((cptr [6] & 0xF) << 24) | (cptr [5] << 16) | (cptr [4] << 8) | cptr [3] ;
lower = (cptr [2] << 16) | (cptr [1] << 8) | cptr [0] ;
if (exponent == 0 && upper == 0 && lower == 0)
return 0.0 ;
dvalue = upper + lower / ((double) 0x1000000) ;
dvalue += 0x10000000 ;
exponent = exponent - 0x3FF ;
dvalue = dvalue / ((double) 0x10000000) ;
if (negative)
dvalue *= -1 ;
if (exponent > 0)
dvalue *= pow (2.0, exponent) ;
else if (exponent < 0)
dvalue /= pow (2.0, abs (exponent)) ;
return dvalue ;
} /* double64_le_read */
void
double64_be_write (double in, unsigned char *out)
{ int exponent, mantissa ;
memset (out, 0, sizeof (double)) ;
if (fabs (in) < 1e-30)
return ;
if (in < 0.0)
{ in *= -1.0 ;
out [0] |= 0x80 ;
} ;
in = frexp (in, &exponent) ;
exponent += 1022 ;
out [0] |= (exponent >> 4) & 0x7F ;
out [1] |= (exponent << 4) & 0xF0 ;
in *= 0x20000000 ;
mantissa = lrint (floor (in)) ;
out [1] |= (mantissa >> 24) & 0xF ;
out [2] = (mantissa >> 16) & 0xFF ;
out [3] = (mantissa >> 8) & 0xFF ;
out [4] = mantissa & 0xFF ;
in = fmod (in, 1.0) ;
in *= 0x1000000 ;
mantissa = lrint (floor (in)) ;
out [5] = (mantissa >> 16) & 0xFF ;
out [6] = (mantissa >> 8) & 0xFF ;
out [7] = mantissa & 0xFF ;
return ;
} /* double64_be_write */
void
double64_le_write (double in, unsigned char *out)
{ int exponent, mantissa ;
memset (out, 0, sizeof (double)) ;
if (fabs (in) < 1e-30)
return ;
if (in < 0.0)
{ in *= -1.0 ;
out [7] |= 0x80 ;
} ;
in = frexp (in, &exponent) ;
exponent += 1022 ;
out [7] |= (exponent >> 4) & 0x7F ;
out [6] |= (exponent << 4) & 0xF0 ;
in *= 0x20000000 ;
mantissa = lrint (floor (in)) ;
out [6] |= (mantissa >> 24) & 0xF ;
out [5] = (mantissa >> 16) & 0xFF ;
out [4] = (mantissa >> 8) & 0xFF ;
out [3] = mantissa & 0xFF ;
in = fmod (in, 1.0) ;
in *= 0x1000000 ;
mantissa = lrint (floor (in)) ;
out [2] = (mantissa >> 16) & 0xFF ;
out [1] = (mantissa >> 8) & 0xFF ;
out [0] = mantissa & 0xFF ;
return ;
} /* double64_le_write */
/*==============================================================================================
** Private functions.
*/
static void
double64_peak_update (SF_PRIVATE *psf, const double *buffer, int count, sf_count_t indx)
{ int chan ;
int k, position ;
float fmaxval ;
for (chan = 0 ; chan < psf->sf.channels ; chan++)
{ fmaxval = fabs (buffer [chan]) ;
position = 0 ;
for (k = chan ; k < count ; k += psf->sf.channels)
if (fmaxval < fabs (buffer [k]))
{ fmaxval = fabs (buffer [k]) ;
position = k ;
} ;
if (fmaxval > psf->peak_info->peaks [chan].value)
{ psf->peak_info->peaks [chan].value = fmaxval ;
psf->peak_info->peaks [chan].position = psf->write_current + indx + (position / psf->sf.channels) ;
} ;
} ;
return ;
} /* double64_peak_update */
static int
double64_get_capability (SF_PRIVATE *psf)
{ union
{ double d ;
unsigned char c [8] ;
} data ;
data.d = 1.234567890123456789 ; /* Some abitrary value. */
if (! psf->ieee_replace)
{ /* If this test is true ints and floats are compatible and little endian. */
if (data.c [0] == 0xfb && data.c [1] == 0x59 && data.c [2] == 0x8c && data.c [3] == 0x42 &&
data.c [4] == 0xca && data.c [5] == 0xc0 && data.c [6] == 0xf3 && data.c [7] == 0x3f)
return DOUBLE_CAN_RW_LE ;
/* If this test is true ints and floats are compatible and big endian. */
if (data.c [0] == 0x3f && data.c [1] == 0xf3 && data.c [2] == 0xc0 && data.c [3] == 0xca &&
data.c [4] == 0x42 && data.c [5] == 0x8c && data.c [6] == 0x59 && data.c [7] == 0xfb)
return DOUBLE_CAN_RW_BE ;
} ;
/* Doubles are broken. Don't expect reading or writing to be fast. */
psf_log_printf (psf, "Using IEEE replacement code for double.\n") ;
return (CPU_IS_LITTLE_ENDIAN) ? DOUBLE_BROKEN_LE : DOUBLE_BROKEN_BE ;
} /* double64_get_capability */
/*=======================================================================================
*/
static void
d2s_array (const double *src, int count, short *dest, double scale)
{ while (--count >= 0)
{ dest [count] = lrint (scale * src [count]) ;
} ;
} /* d2s_array */
static void
d2s_clip_array (const double *src, int count, short *dest, double scale)
{ while (--count >= 0)
{ double tmp = scale * src [count] ;
if (CPU_CLIPS_POSITIVE == 0 && tmp > 32767.0)
dest [count] = SHRT_MAX ;
else if (CPU_CLIPS_NEGATIVE == 0 && tmp < -32768.0)
dest [count] = SHRT_MIN ;
else
dest [count] = lrint (tmp) ;
} ;
} /* d2s_clip_array */
static void
d2i_array (const double *src, int count, int *dest, double scale)
{ while (--count >= 0)
{ dest [count] = lrint (scale * src [count]) ;
} ;
} /* d2i_array */
static void
d2i_clip_array (const double *src, int count, int *dest, double scale)
{ while (--count >= 0)
{ float tmp = scale * src [count] ;
if (CPU_CLIPS_POSITIVE == 0 && tmp > (1.0 * INT_MAX))
dest [count] = INT_MAX ;
else if (CPU_CLIPS_NEGATIVE == 0 && tmp < (-1.0 * INT_MAX))
dest [count] = INT_MIN ;
else
dest [count] = lrint (tmp) ;
} ;
} /* d2i_clip_array */
static inline void
d2f_array (const double *src, int count, float *dest)
{ while (--count >= 0)
{ dest [count] = src [count] ;
} ;
} /* d2f_array */
static inline void
s2d_array (const short *src, double *dest, int count, double scale)
{ while (--count >= 0)
{ dest [count] = scale * src [count] ;
} ;
} /* s2d_array */
static inline void
i2d_array (const int *src, double *dest, int count, double scale)
{ while (--count >= 0)
{ dest [count] = scale * src [count] ;
} ;
} /* i2d_array */
static inline void
f2d_array (const float *src, double *dest, int count)
{ while (--count >= 0)
{ dest [count] = src [count] ;
} ;
} /* f2d_array */
/*----------------------------------------------------------------------------------------------
*/
static sf_count_t
host_read_d2s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
{ void (*convert) (const double *, int, short *, double) ;
int bufferlen, readcount ;
sf_count_t total = 0 ;
double scale ;
convert = (psf->add_clipping) ? d2s_clip_array : d2s_array ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
scale = (psf->float_int_mult == 0) ? 1.0 : 0x7FFF / psf->float_max ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, readcount) ;
convert (psf->u.dbuf, readcount, ptr + total, scale) ;
total += readcount ;
len -= readcount ;
if (readcount < bufferlen)
break ;
} ;
return total ;
} /* host_read_d2s */
static sf_count_t
host_read_d2i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
{ void (*convert) (const double *, int, int *, double) ;
int bufferlen, readcount ;
sf_count_t total = 0 ;
double scale ;
convert = (psf->add_clipping) ? d2i_clip_array : d2i_array ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
scale = (psf->float_int_mult == 0) ? 1.0 : 0x7FFFFFFF / psf->float_max ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
convert (psf->u.dbuf, readcount, ptr + total, scale) ;
total += readcount ;
len -= readcount ;
if (readcount < bufferlen)
break ;
} ;
return total ;
} /* host_read_d2i */
static sf_count_t
host_read_d2f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
{ int bufferlen, readcount ;
sf_count_t total = 0 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
d2f_array (psf->u.dbuf, readcount, ptr + total) ;
total += readcount ;
len -= readcount ;
if (readcount < bufferlen)
break ;
} ;
return total ;
} /* host_read_d2f */
static sf_count_t
host_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
{ int bufferlen ;
sf_count_t readcount, total = 0 ;
readcount = psf_fread (ptr, sizeof (double), len, psf) ;
if (psf->data_endswap != SF_TRUE)
return readcount ;
/* If the read length was sensible, endswap output in one go. */
if (readcount < SENSIBLE_LEN)
{ endswap_double_array (ptr, readcount) ;
return readcount ;
} ;
bufferlen = SENSIBLE_LEN ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
endswap_double_array (ptr + total, bufferlen) ;
total += bufferlen ;
len -= bufferlen ;
} ;
return total ;
} /* host_read_d */
static sf_count_t
host_write_s2d (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
double scale ;
scale = (psf->scale_int_float == 0) ? 1.0 : 1.0 / 0x8000 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
s2d_array (ptr + total, psf->u.dbuf, bufferlen, scale) ;
if (psf->peak_info)
double64_peak_update (psf, psf->u.dbuf, bufferlen, total / psf->sf.channels) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* host_write_s2d */
static sf_count_t
host_write_i2d (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
double scale ;
scale = (psf->scale_int_float == 0) ? 1.0 : 1.0 / (8.0 * 0x10000000) ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
i2d_array (ptr + total, psf->u.dbuf, bufferlen, scale) ;
if (psf->peak_info)
double64_peak_update (psf, psf->u.dbuf, bufferlen, total / psf->sf.channels) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* host_write_i2d */
static sf_count_t
host_write_f2d (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
f2d_array (ptr + total, psf->u.dbuf, bufferlen) ;
if (psf->peak_info)
double64_peak_update (psf, psf->u.dbuf, bufferlen, total / psf->sf.channels) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* host_write_f2d */
static sf_count_t
host_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
if (psf->peak_info)
double64_peak_update (psf, ptr, len, 0) ;
if (psf->data_endswap != SF_TRUE)
return psf_fwrite (ptr, sizeof (double), len, psf) ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
endswap_double_copy (psf->u.dbuf, ptr + total, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* host_write_d */
/*=======================================================================================
*/
static sf_count_t
replace_read_d2s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
{ int bufferlen, readcount ;
sf_count_t total = 0 ;
double scale ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
scale = (psf->float_int_mult == 0) ? 1.0 : 0x7FFF / psf->float_max ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
d2bd_read (psf->u.dbuf, bufferlen) ;
d2s_array (psf->u.dbuf, readcount, ptr + total, scale) ;
total += readcount ;
if (readcount < bufferlen)
break ;
len -= readcount ;
} ;
return total ;
} /* replace_read_d2s */
static sf_count_t
replace_read_d2i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
{ int bufferlen, readcount ;
sf_count_t total = 0 ;
double scale ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
scale = (psf->float_int_mult == 0) ? 1.0 : 0x7FFFFFFF / psf->float_max ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
d2bd_read (psf->u.dbuf, bufferlen) ;
d2i_array (psf->u.dbuf, readcount, ptr + total, scale) ;
total += readcount ;
if (readcount < bufferlen)
break ;
len -= readcount ;
} ;
return total ;
} /* replace_read_d2i */
static sf_count_t
replace_read_d2f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
{ int bufferlen, readcount ;
sf_count_t total = 0 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
d2bd_read (psf->u.dbuf, bufferlen) ;
memcpy (ptr + total, psf->u.dbuf, bufferlen * sizeof (double)) ;
total += readcount ;
if (readcount < bufferlen)
break ;
len -= readcount ;
} ;
return total ;
} /* replace_read_d2f */
static sf_count_t
replace_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
{ int bufferlen, readcount ;
sf_count_t total = 0 ;
/* FIXME : This is probably nowhere near optimal. */
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
readcount = psf_fread (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, readcount) ;
d2bd_read (psf->u.dbuf, readcount) ;
memcpy (ptr + total, psf->u.dbuf, readcount * sizeof (double)) ;
total += readcount ;
if (readcount < bufferlen)
break ;
len -= readcount ;
} ;
return total ;
} /* replace_read_d */
static sf_count_t
replace_write_s2d (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
double scale ;
scale = (psf->scale_int_float == 0) ? 1.0 : 1.0 / 0x8000 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
s2d_array (ptr + total, psf->u.dbuf, bufferlen, scale) ;
if (psf->peak_info)
double64_peak_update (psf, psf->u.dbuf, bufferlen, total / psf->sf.channels) ;
bd2d_write (psf->u.dbuf, bufferlen) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* replace_write_s2d */
static sf_count_t
replace_write_i2d (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
double scale ;
scale = (psf->scale_int_float == 0) ? 1.0 : 1.0 / (8.0 * 0x10000000) ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
i2d_array (ptr + total, psf->u.dbuf, bufferlen, scale) ;
if (psf->peak_info)
double64_peak_update (psf, psf->u.dbuf, bufferlen, total / psf->sf.channels) ;
bd2d_write (psf->u.dbuf, bufferlen) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* replace_write_i2d */
static sf_count_t
replace_write_f2d (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
f2d_array (ptr + total, psf->u.dbuf, bufferlen) ;
bd2d_write (psf->u.dbuf, bufferlen) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* replace_write_f2d */
static sf_count_t
replace_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
{ int bufferlen, writecount ;
sf_count_t total = 0 ;
/* FIXME : This is probably nowhere near optimal. */
if (psf->peak_info)
double64_peak_update (psf, ptr, len, 0) ;
bufferlen = ARRAY_LEN (psf->u.dbuf) ;
while (len > 0)
{ if (len < bufferlen)
bufferlen = (int) len ;
memcpy (psf->u.dbuf, ptr + total, bufferlen * sizeof (double)) ;
bd2d_write (psf->u.dbuf, bufferlen) ;
if (psf->data_endswap == SF_TRUE)
endswap_double_array (psf->u.dbuf, bufferlen) ;
writecount = psf_fwrite (psf->u.dbuf, sizeof (double), bufferlen, psf) ;
total += writecount ;
if (writecount < bufferlen)
break ;
len -= writecount ;
} ;
return total ;
} /* replace_write_d */
/*----------------------------------------------------------------------------------------------
*/
static void
d2bd_read (double *buffer, int count)
{ while (--count >= 0)
{ buffer [count] = DOUBLE64_READ ((unsigned char *) (buffer + count)) ;
} ;
} /* d2bd_read */
static void
bd2d_write (double *buffer, int count)
{ while (--count >= 0)
{ DOUBLE64_WRITE (buffer [count], (unsigned char*) (buffer + count)) ;
} ;
} /* bd2d_write */
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