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arts/flow/gsl/gsldatautils.h

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/* GSL - Generic Sound Layer
* Copyright (C) 2001-2002 Stefan Westerfeld and Tim Janik
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GSL_DATA_UTILS_H__
#define __GSL_DATA_UTILS_H__
#include <gsl/gslmath.h>
#include <gsl/gsldatahandle.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* --- structures --- */
#define GSL_DATA_HANDLE_PEEK_BUFFER (8192)
typedef struct
{
gint dir; /* initialize direction to -1 or +1 (or 0 for random access) */
GslLong start; /* initialize to 0 */
GslLong end; /* initialize to 0 */
gfloat data[GSL_DATA_HANDLE_PEEK_BUFFER];
} GslDataPeekBuffer;
typedef struct
{
GslLong head_skip; /* FIXME: remove this */
GslLong tail_cut;
GslLong min_loop;
GslLong max_loop;
} GslLoopSpec; /* rename this to ...Data... */
/* --- data utils --- */
gboolean gsl_data_detect_signal (GslDataHandle *handle,
GslLong *sigstart,
GslLong *sigend);
GslLong gsl_data_find_sample (GslDataHandle *dhandle,
gfloat min_value,
gfloat max_value,
GslLong start_offset,
gint direction);
gboolean gsl_data_find_tailmatch (GslDataHandle *dhandle,
const GslLoopSpec *lspec,
GslLong *loop_start_p,
GslLong *loop_end_p);
GslLong gsl_data_find_block (GslDataHandle *handle,
guint n_values,
const gfloat *values,
gfloat epsilon);
/* --- data handle utils --- */
static inline gfloat gsl_data_handle_peek_value (GslDataHandle *dhandle,
GslLong position,
GslDataPeekBuffer *peekbuf);
gint /* errno */ gsl_data_handle_dump (GslDataHandle *dhandle,
gint fd,
GslWaveFormatType format,
guint byte_order);
gint /* errno */ gsl_data_handle_dump_wav (GslDataHandle *dhandle,
gint fd,
guint n_bits,
guint n_channels,
guint sample_freq);
/* --- conversion utils --- */
static inline guint gsl_conv_from_float (GslWaveFormatType format,
guint byte_order,
const gfloat *src,
gpointer dest,
guint n_values);
static inline guint gsl_conv_from_float_clip (GslWaveFormatType format,
guint byte_order,
const gfloat *src,
gpointer dest,
guint n_values);
static inline void gsl_conv_to_float (GslWaveFormatType format,
guint byte_order,
gconstpointer src,
gfloat *dest,
guint n_values);
static inline guint gsl_conv_from_double (GslWaveFormatType format,
guint byte_order,
const gdouble *src,
gpointer dest,
guint n_values);
static inline guint gsl_conv_from_double_clip (GslWaveFormatType format,
guint byte_order,
const gdouble *src,
gpointer dest,
guint n_values);
static inline void gsl_conv_to_double (GslWaveFormatType format,
guint byte_order,
gconstpointer src,
gdouble *dest,
guint n_values);
/* --- misc implementations --- */
gfloat gsl_data_peek_value_f (GslDataHandle *dhandle,
GslLong pos,
GslDataPeekBuffer *peekbuf);
static inline gfloat
gsl_data_handle_peek_value (GslDataHandle *dhandle,
GslLong position,
GslDataPeekBuffer *peekbuf)
{
return (position >= peekbuf->start && position < peekbuf->end ?
peekbuf->data[position - peekbuf->start] :
gsl_data_peek_value_f (dhandle, position, peekbuf));
}
#define GSL_CONV_FORMAT(format, endian_flag) (((endian_flag) << 16) | ((format) & 0xffff))
static inline guint /* returns number of bytes used in dest */
gsl_conv_from_float (GslWaveFormatType format,
guint byte_order,
const gfloat *src,
gpointer dest,
guint n_values)
{
gint8 *i8 = (gint8*) dest;
guint8 *u8 = (guint8*) dest;
gint16 *i16 = (gint16*) dest;
guint16 *u16 = (guint16*) dest;
guint32 *u32dest = (guint32*) dest;
const gfloat *bound = src + n_values;
guint32 *u32src = (guint32*) src, *u32bound = (guint32*) bound;
if (!n_values)
return 0;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
GslFpuState fpu;
gfloat v;
gint16 vi16;
guint16 vu16;
guint32 vu32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*u8++ = *src++ * 128. + 128.5;
while (src < bound);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 128.;
*i8++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
*u16++ = *src++ * 2048. + 2048.5;
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *src++ * 2048. + 2048.5;
*u16++ = GUINT16_SWAP_LE_BE (vu16);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
*i16++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi16 = gsl_ftoi (v);
*i16++ = GUINT16_SWAP_LE_BE (vi16);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*u16++ = *src++ * 32768. + 32768.5;
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *src++ * 32768. + 32768.5;
*u16++ = GUINT16_SWAP_LE_BE (vu16);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
*i16++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi16 = gsl_ftoi (v);
*i16++ = GUINT16_SWAP_LE_BE (vi16);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
return n_values << 2;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32src < u32bound);
return n_values << 2;
default:
g_assert_not_reached ();
return 0;
}
}
static inline guint /* returns number of bytes used in dest */
gsl_conv_from_float_clip (GslWaveFormatType format,
guint byte_order,
const gfloat *src,
gpointer dest,
guint n_values)
{
gint8 *i8 = (gint8*) dest;
guint8 *u8 = (guint8*) dest;
gint16 *i16 = (gint16*) dest;
guint16 *u16 = (guint16*) dest;
guint32 *u32dest = (guint32*) dest;
const gfloat *bound = src + n_values;
guint32 *u32src = (guint32*) src, *u32bound = (guint32*) bound;
if (!n_values)
return 0;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
GslFpuState fpu;
gfloat v;
guint32 vu32;
gint32 vi32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 128. + 128.5;
*u8++ = CLAMP (vi32, 0, 255);
}
while (src < bound);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 128.;
vi32 = gsl_ftoi (v);
*i8++ = CLAMP (vi32, -128, 127);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi32 = *src++ * 2048. + 2048.5;
*u16++ = CLAMP (vi32, 0, 4095);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 2048. + 2048.5;
vi32 = CLAMP (vi32, 0, 4095);
*u16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi32 = gsl_ftoi (v);
*i16++ = CLAMP (vi32, -2048, 2047);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -2048, 2047);
*i16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi32 = *src++ * 32768. + 32768.5;
*u16++ = CLAMP (vi32, 0, 65535);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 32768. + 32768.5;
vi32 = CLAMP (vi32, 0, 65535);
*u16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -32768, 32767);
*i16++ = vi32;
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -32768, 32767);
*i16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
return n_values << 2;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32src < u32bound);
return n_values << 2;
default:
g_assert_not_reached ();
return 0;
}
}
static inline void
gsl_conv_to_float (GslWaveFormatType format,
guint byte_order,
gconstpointer src,
gfloat *dest,
guint n_values)
{
guint8 *u8 = (guint8*) src;
gint8 *i8 = (gint8*) src;
guint16 *u16 = (guint16*) src;
gint16 *i16 = (gint16*) src;
guint32 *u32src = (guint32*) src;
gfloat *bound = dest + n_values;
guint32 *u32dest = (guint32*) dest, *u32bound = (guint32*) bound;
if (!n_values)
return;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
gint16 vi16;
guint16 vu16;
guint32 vu32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*dest++ = (*u8++ - 128) * (1. / 128.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*dest++ = *i8++ * (1. / 128.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = ((*u16++ & 0x0fff) - 2048) * (1. / 2048.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *u16++;
*dest++ = ((GUINT16_SWAP_LE_BE (vu16) & 0x0fff) - 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi16 = *i16++;
*dest++ = CLAMP (vi16, -2048, 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi16 = *i16++;
vi16 = GUINT16_SWAP_LE_BE (vi16);
*dest++ = CLAMP (vi16, -2048, 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = (*u16++ - 32768) * (1. / 32768.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *u16++;
*dest++ = (GUINT16_SWAP_LE_BE (vu16) - 32768) * (1. / 32768.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = *i16++ * (1. / 32768.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi16 = *i16++;
*dest++ = GUINT16_SWAP_LE_BE (vi16) * (1. / 32768.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32dest < u32bound);
break;
default:
g_assert_not_reached ();
}
}
/* same as above with s/float/double */
static inline guint /* returns number of bytes used in dest */
gsl_conv_from_double (GslWaveFormatType format,
guint byte_order,
const gdouble *src,
gpointer dest,
guint n_values)
{
gint8 *i8 = (gint8*) dest;
guint8 *u8 = (guint8*) dest;
gint16 *i16 = (gint16*) dest;
guint16 *u16 = (guint16*) dest;
guint32 *u32dest = (guint32*) dest;
const gdouble *bound = src + n_values;
guint32 *u32src = (guint32*) src, *u32bound = (guint32*) bound;
if (!n_values)
return 0;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
GslFpuState fpu;
gdouble v;
gint16 vi16;
guint16 vu16;
guint32 vu32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*u8++ = *src++ * 128. + 128.5;
while (src < bound);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 128.;
*i8++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
*u16++ = *src++ * 2048. + 2048.5;
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *src++ * 2048. + 2048.5;
*u16++ = GUINT16_SWAP_LE_BE (vu16);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
*i16++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi16 = gsl_ftoi (v);
*i16++ = GUINT16_SWAP_LE_BE (vi16);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*u16++ = *src++ * 32768. + 32768.5;
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *src++ * 32768. + 32768.5;
*u16++ = GUINT16_SWAP_LE_BE (vu16);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
*i16++ = gsl_ftoi (v);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi16 = gsl_ftoi (v);
*i16++ = GUINT16_SWAP_LE_BE (vi16);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
return n_values << 2;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32src < u32bound);
return n_values << 2;
default:
g_assert_not_reached ();
return 0;
}
}
static inline guint /* returns number of bytes used in dest */
gsl_conv_from_double_clip (GslWaveFormatType format,
guint byte_order,
const gdouble *src,
gpointer dest,
guint n_values)
{
gint8 *i8 = (gint8*) dest;
guint8 *u8 = (guint8*) dest;
gint16 *i16 = (gint16*) dest;
guint16 *u16 = (guint16*) dest;
guint32 *u32dest = (guint32*) dest;
const gdouble *bound = src + n_values;
guint32 *u32src = (guint32*) src, *u32bound = (guint32*) bound;
if (!n_values)
return 0;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
GslFpuState fpu;
gdouble v;
guint32 vu32;
gint32 vi32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 128. + 128.5;
*u8++ = CLAMP (vi32, 0, 255);
}
while (src < bound);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 128.;
vi32 = gsl_ftoi (v);
*i8++ = CLAMP (vi32, -128, 127);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi32 = *src++ * 2048. + 2048.5;
*u16++ = CLAMP (vi32, 0, 4095);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 2048. + 2048.5;
vi32 = CLAMP (vi32, 0, 4095);
*u16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi32 = gsl_ftoi (v);
*i16++ = CLAMP (vi32, -2048, 2047);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 2048.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -2048, 2047);
*i16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi32 = *src++ * 32768. + 32768.5;
*u16++ = CLAMP (vi32, 0, 65535);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi32 = *src++ * 32768. + 32768.5;
vi32 = CLAMP (vi32, 0, 65535);
*u16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -32768, 32767);
*i16++ = vi32;
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
gsl_fpu_setround (&fpu);
do
{
v = *src++;
v *= 32768.;
vi32 = gsl_ftoi (v);
vi32 = CLAMP (vi32, -32768, 32767);
*i16++ = GUINT16_SWAP_LE_BE (vi32);
}
while (src < bound);
gsl_fpu_restore (fpu);
return n_values << 1;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
return n_values << 2;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32src < u32bound);
return n_values << 2;
default:
g_assert_not_reached ();
return 0;
}
}
static inline void
gsl_conv_to_double (GslWaveFormatType format,
guint byte_order,
gconstpointer src,
gdouble *dest,
guint n_values)
{
guint8 *u8 = (guint8*) src;
gint8 *i8 = (gint8*) src;
guint16 *u16 = (guint16*) src;
gint16 *i16 = (gint16*) src;
guint32 *u32src = (guint32*) src;
gdouble *bound = dest + n_values;
guint32 *u32dest = (guint32*) dest, *u32bound = (guint32*) bound;
if (!n_values)
return;
switch (GSL_CONV_FORMAT (format, byte_order == G_BYTE_ORDER))
{
gint16 vi16;
guint16 vu16;
guint32 vu32;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*dest++ = (*u8++ - 128) * (1. / 128.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER == G_BYTE_ORDER):
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_8, G_BYTE_ORDER != G_BYTE_ORDER):
do
*dest++ = *i8++ * (1. / 128.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = ((*u16++ & 0x0fff) - 2048) * (1. / 2048.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *u16++;
*dest++ = ((GUINT16_SWAP_LE_BE (vu16) & 0x0fff) - 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER == G_BYTE_ORDER):
do
{
vi16 = *i16++;
*dest++ = CLAMP (vi16, -2048, 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_12, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi16 = *i16++;
vi16 = GUINT16_SWAP_LE_BE (vi16);
*dest++ = CLAMP (vi16, -2048, 2048) * (1. / 2048.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = (*u16++ - 32768) * (1. / 32768.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_UNSIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu16 = *u16++;
*dest++ = (GUINT16_SWAP_LE_BE (vu16) - 32768) * (1. / 32768.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER == G_BYTE_ORDER):
do
*dest++ = *i16++ * (1. / 32768.);
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_SIGNED_16, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vi16 = *i16++;
*dest++ = GUINT16_SWAP_LE_BE (vi16) * (1. / 32768.);
}
while (dest < bound);
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER == G_BYTE_ORDER):
break;
case GSL_CONV_FORMAT (GSL_WAVE_FORMAT_FLOAT, G_BYTE_ORDER != G_BYTE_ORDER):
do
{
vu32 = *u32src++;
*u32dest++ = GUINT32_SWAP_LE_BE (vu32);
}
while (u32dest < u32bound);
break;
default:
g_assert_not_reached ();
}
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GSL_DATA_UTILS_H__ */
/* vim:set ts=8 sts=2 sw=2: */
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