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diff --git a/src/xi.c b/src/xi.c
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+++ b/src/xi.c
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+/*
+** Copyright (C) 2003-2006 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 <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "sndfile.h"
+#include "sfendian.h"
+#include "common.h"
+#include "float_cast.h"
+
+#define MAX_XI_SAMPLES 16
+
+/*------------------------------------------------------------------------------
+** Private static functions and tyepdefs.
+*/
+
+typedef struct
+{ /* Warning, this filename is NOT nul terminated. */
+ char filename [22] ;
+ char software [20] ;
+ char sample_name [22] ;
+
+ int loop_begin, loop_end ;
+ int sample_flags ;
+
+ /* Data for encoder and decoder. */
+ short last_16 ;
+} XI_PRIVATE ;
+
+static int xi_close (SF_PRIVATE *psf) ;
+static int xi_write_header (SF_PRIVATE *psf, int calc_length) ;
+static int xi_read_header (SF_PRIVATE *psf) ;
+static int dpcm_init (SF_PRIVATE *psf) ;
+
+
+static sf_count_t dpcm_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ;
+
+/*------------------------------------------------------------------------------
+** Public function.
+*/
+
+int
+xi_open (SF_PRIVATE *psf)
+{ XI_PRIVATE *pxi ;
+ int subformat, error = 0 ;
+
+ if (psf->is_pipe)
+ return SFE_XI_NO_PIPE ;
+
+ if (psf->codec_data)
+ pxi = psf->codec_data ;
+ else if ((pxi = calloc (1, sizeof (XI_PRIVATE))) == NULL)
+ return SFE_MALLOC_FAILED ;
+
+ psf->codec_data = pxi ;
+
+ if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
+ { if ((error = xi_read_header (psf)))
+ return error ;
+ } ;
+
+ subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
+
+ if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
+ { if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_XI)
+ return SFE_BAD_OPEN_FORMAT ;
+
+ psf->endian = SF_ENDIAN_LITTLE ;
+ psf->sf.channels = 1 ; /* Always mono */
+ psf->sf.samplerate = 44100 ; /* Always */
+
+ /* Set up default instrument and software name. */
+ memcpy (pxi->filename, "Default Name ", sizeof (pxi->filename)) ;
+ memcpy (pxi->software, PACKAGE "-" VERSION " ", sizeof (pxi->software)) ;
+
+ memset (pxi->sample_name, 0, sizeof (pxi->sample_name)) ;
+ LSF_SNPRINTF (pxi->sample_name, sizeof (pxi->sample_name), "%s", "Sample #1") ;
+
+ pxi->sample_flags = (subformat == SF_FORMAT_DPCM_16) ? 16 : 0 ;
+
+ if (xi_write_header (psf, SF_FALSE))
+ return psf->error ;
+
+ psf->write_header = xi_write_header ;
+ } ;
+
+ psf->container_close = xi_close ;
+ psf->seek = dpcm_seek ;
+
+ psf->sf.seekable = SF_FALSE ;
+
+ psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+
+ switch (subformat)
+ { case SF_FORMAT_DPCM_8 : /* 8-bit differential PCM. */
+ case SF_FORMAT_DPCM_16 : /* 16-bit differential PCM. */
+ error = dpcm_init (psf) ;
+ break ;
+
+ default : break ;
+ } ;
+
+ return error ;
+} /* xi_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+xi_close (SF_PRIVATE * UNUSED (psf))
+{
+ return 0 ;
+} /* xi_close */
+
+/*==============================================================================
+*/
+
+static sf_count_t dpcm_read_dsc2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dsc2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dsc2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dsc2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
+
+static sf_count_t dpcm_write_s2dsc (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_i2dsc (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_f2dsc (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_d2dsc (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
+
+static sf_count_t dpcm_read_dles2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dles2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dles2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
+static sf_count_t dpcm_read_dles2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
+
+static sf_count_t dpcm_write_s2dles (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_i2dles (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_f2dles (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
+static sf_count_t dpcm_write_d2dles (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
+
+static int
+dpcm_init (SF_PRIVATE *psf)
+{ if (psf->bytewidth == 0 || psf->sf.channels == 0)
+ return SFE_INTERNAL ;
+
+ psf->blockwidth = psf->bytewidth * psf->sf.channels ;
+
+ if (psf->mode == SFM_READ || psf->mode == SFM_RDWR)
+ { switch (psf->bytewidth)
+ { case 1 :
+ psf->read_short = dpcm_read_dsc2s ;
+ psf->read_int = dpcm_read_dsc2i ;
+ psf->read_float = dpcm_read_dsc2f ;
+ psf->read_double = dpcm_read_dsc2d ;
+ break ;
+ case 2 :
+ psf->read_short = dpcm_read_dles2s ;
+ psf->read_int = dpcm_read_dles2i ;
+ psf->read_float = dpcm_read_dles2f ;
+ psf->read_double = dpcm_read_dles2d ;
+ break ;
+ default :
+ psf_log_printf (psf, "dpcm_init() returning SFE_UNIMPLEMENTED\n") ;
+ return SFE_UNIMPLEMENTED ;
+ } ;
+ } ;
+
+ if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
+ { switch (psf->bytewidth)
+ { case 1 :
+ psf->write_short = dpcm_write_s2dsc ;
+ psf->write_int = dpcm_write_i2dsc ;
+ psf->write_float = dpcm_write_f2dsc ;
+ psf->write_double = dpcm_write_d2dsc ;
+ break ;
+ case 2 :
+ psf->write_short = dpcm_write_s2dles ;
+ psf->write_int = dpcm_write_i2dles ;
+ psf->write_float = dpcm_write_f2dles ;
+ psf->write_double = dpcm_write_d2dles ;
+ break ;
+ default :
+ psf_log_printf (psf, "dpcm_init() returning SFE_UNIMPLEMENTED\n") ;
+ return SFE_UNIMPLEMENTED ;
+ } ;
+ } ;
+
+ psf->filelength = psf_get_filelen (psf) ;
+ psf->datalength = (psf->dataend) ? psf->dataend - psf->dataoffset :
+ psf->filelength - psf->dataoffset ;
+ psf->sf.frames = psf->datalength / psf->blockwidth ;
+
+ return 0 ;
+} /* dpcm_init */
+
+/*==============================================================================
+*/
+
+static sf_count_t
+dpcm_seek (SF_PRIVATE *psf, int mode, sf_count_t offset)
+{ XI_PRIVATE *pxi ;
+ int total, bufferlen, len ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return SFE_INTERNAL ;
+
+ if (psf->datalength < 0 || psf->dataoffset < 0)
+ { psf->error = SFE_BAD_SEEK ;
+ return PSF_SEEK_ERROR ;
+ } ;
+
+ if (offset == 0)
+ { psf_fseek (psf, psf->dataoffset, SEEK_SET) ;
+ pxi->last_16 = 0 ;
+ return 0 ;
+ } ;
+
+ if (offset < 0 || offset > psf->sf.frames)
+ { psf->error = SFE_BAD_SEEK ;
+ return PSF_SEEK_ERROR ;
+ } ;
+
+ if (mode != SFM_READ)
+ { /* What to do about write??? */
+ psf->error = SFE_BAD_SEEK ;
+ return PSF_SEEK_ERROR ;
+ } ;
+
+ psf_fseek (psf, psf->dataoffset, SEEK_SET) ;
+
+ if ((psf->sf.format & SF_FORMAT_SUBMASK) == SF_FORMAT_DPCM_16)
+ { total = offset ;
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+ while (total > 0)
+ { len = (total > bufferlen) ? bufferlen : total ;
+ total -= dpcm_read_dles2s (psf, psf->u.sbuf, len) ;
+ } ;
+ }
+ else
+ { total = offset ;
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+ while (total > 0)
+ { len = (total > bufferlen) ? bufferlen : total ;
+ total -= dpcm_read_dsc2s (psf, psf->u.sbuf, len) ;
+ } ;
+ } ;
+
+ return offset ;
+} /* dpcm_seek */
+
+
+static int
+xi_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
+{ XI_PRIVATE *pxi ;
+ sf_count_t current ;
+ const char *string ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return SFE_INTERNAL ;
+
+ current = psf_ftell (psf) ;
+
+ /* Reset the current header length to zero. */
+ psf->header [0] = 0 ;
+ psf->headindex = 0 ;
+ psf_fseek (psf, 0, SEEK_SET) ;
+
+ string = "Extended Instrument: " ;
+ psf_binheader_writef (psf, "b", string, strlen (string)) ;
+ psf_binheader_writef (psf, "b1", pxi->filename, sizeof (pxi->filename), 0x1A) ;
+
+ /* Write software version and two byte XI version. */
+ psf_binheader_writef (psf, "eb2", pxi->software, sizeof (pxi->software), (1 << 8) + 2) ;
+
+ /*
+ ** Jump note numbers (96), volume envelope (48), pan envelope (48),
+ ** volume points (1), pan points (1)
+ */
+ psf_binheader_writef (psf, "z", (size_t) (96 + 48 + 48 + 1 + 1)) ;
+
+ /* Jump volume loop (3 bytes), pan loop (3), envelope flags (3), vibrato (3)
+ ** fade out (2), 22 unknown bytes, and then write sample_count (2 bytes).
+ */
+ psf_binheader_writef (psf, "ez2z2", (size_t) (4 * 3), 0x1234, make_size_t (22), 1) ;
+
+ pxi->loop_begin = 0 ;
+ pxi->loop_end = 0 ;
+
+ psf_binheader_writef (psf, "et844", psf->sf.frames, pxi->loop_begin, pxi->loop_end) ;
+
+ /* volume, fine tune, flags, pan, note, namelen */
+ psf_binheader_writef (psf, "111111", 128, 0, pxi->sample_flags, 128, 0, strlen (pxi->sample_name)) ;
+
+ psf_binheader_writef (psf, "b", pxi->sample_name, sizeof (pxi->sample_name)) ;
+
+
+
+
+
+ /* Header construction complete so write it out. */
+ psf_fwrite (psf->header, psf->headindex, 1, psf) ;
+
+ if (psf->error)
+ return psf->error ;
+
+ psf->dataoffset = psf->headindex ;
+
+ if (current > 0)
+ psf_fseek (psf, current, SEEK_SET) ;
+
+ return psf->error ;
+} /* xi_write_header */
+
+static int
+xi_read_header (SF_PRIVATE *psf)
+{ char buffer [64], name [32] ;
+ short version, fade_out, sample_count ;
+ int k, loop_begin, loop_end ;
+ int sample_sizes [MAX_XI_SAMPLES] ;
+
+ psf_binheader_readf (psf, "pb", 0, buffer, 21) ;
+
+ memset (sample_sizes, 0, sizeof (sample_sizes)) ;
+
+ buffer [20] = 0 ;
+ if (strcmp (buffer, "Extended Instrument:") != 0)
+ return SFE_XI_BAD_HEADER ;
+
+ memset (buffer, 0, sizeof (buffer)) ;
+ psf_binheader_readf (psf, "b", buffer, 23) ;
+
+ if (buffer [22] != 0x1A)
+ return SFE_XI_BAD_HEADER ;
+
+ buffer [22] = 0 ;
+ psf_log_printf (psf, "Extended Instrument : %s\n", buffer) ;
+
+ psf_binheader_readf (psf, "be2", buffer, 20, &version) ;
+ buffer [19] = 0 ;
+ psf_log_printf (psf, "Software : %s\nVersion : %d.%02d\n", buffer, version / 256, version % 256) ;
+
+ /* Jump note numbers (96), volume envelope (48), pan envelope (48),
+ ** volume points (1), pan points (1)
+ */
+ psf_binheader_readf (psf, "j", 96 + 48 + 48 + 1 + 1) ;
+
+ psf_binheader_readf (psf, "b", buffer, 12) ;
+ psf_log_printf (psf, "Volume Loop\n sustain : %u\n begin : %u\n end : %u\n",
+ buffer [0], buffer [1], buffer [2]) ;
+ psf_log_printf (psf, "Pan Loop\n sustain : %u\n begin : %u\n end : %u\n",
+ buffer [3], buffer [4], buffer [5]) ;
+ psf_log_printf (psf, "Envelope Flags\n volume : 0x%X\n pan : 0x%X\n",
+ buffer [6] & 0xFF, buffer [7] & 0xFF) ;
+
+ psf_log_printf (psf, "Vibrato\n type : %u\n sweep : %u\n depth : %u\n rate : %u\n",
+ buffer [8], buffer [9], buffer [10], buffer [11]) ;
+
+ /*
+ ** Read fade_out then jump reserved (2 bytes) and ???? (20 bytes) and
+ ** sample_count.
+ */
+ psf_binheader_readf (psf, "e2j2", &fade_out, 2 + 20, &sample_count) ;
+ psf_log_printf (psf, "Fade out : %d\n", fade_out) ;
+
+ /* XI file can contain up to 16 samples. */
+ if (sample_count > MAX_XI_SAMPLES)
+ return SFE_XI_EXCESS_SAMPLES ;
+
+ if (psf->instrument == NULL && (psf->instrument = psf_instrument_alloc ()) == NULL)
+ return SFE_MALLOC_FAILED ;
+
+ /* Log all data for each sample. */
+ for (k = 0 ; k < sample_count ; k++)
+ { psf_binheader_readf (psf, "e444", &(sample_sizes [k]), &loop_begin, &loop_end) ;
+
+ /* Read 5 know bytes, 1 unknown byte and 22 name bytes. */
+ psf_binheader_readf (psf, "bb", buffer, 6, name, 22) ;
+ name [21] = 0 ;
+
+ psf_log_printf (psf, "Sample #%d\n name : %s\n", k + 1, name) ;
+
+ psf_log_printf (psf, " size : %d\n", sample_sizes [k]) ;
+
+
+
+ psf_log_printf (psf, " loop\n begin : %d\n end : %d\n", loop_begin, loop_end) ;
+
+ psf_log_printf (psf, " volume : %u\n f. tune : %d\n flags : 0x%02X ",
+ buffer [0] & 0xFF, buffer [1] & 0xFF, buffer [2] & 0xFF) ;
+
+ psf_log_printf (psf, " (") ;
+ if (buffer [2] & 1)
+ psf_log_printf (psf, " Loop") ;
+ if (buffer [2] & 2)
+ psf_log_printf (psf, " PingPong") ;
+ psf_log_printf (psf, (buffer [2] & 16) ? " 16bit" : " 8bit") ;
+ psf_log_printf (psf, " )\n") ;
+
+ psf_log_printf (psf, " pan : %u\n note : %d\n namelen : %d\n",
+ buffer [3] & 0xFF, buffer [4], buffer [5]) ;
+
+ if (k != 0)
+ continue ;
+
+ if (buffer [2] & 16)
+ { psf->sf.format = SF_FORMAT_XI | SF_FORMAT_DPCM_16 ;
+ psf->bytewidth = 2 ;
+ }
+ else
+ { psf->sf.format = SF_FORMAT_XI | SF_FORMAT_DPCM_8 ;
+ psf->bytewidth = 1 ;
+ } ;
+ } ;
+
+ while (sample_count > 1 && sample_sizes [sample_count - 1] == 0)
+ sample_count -- ;
+
+ /* Currently, we can only handle 1 sample per file. */
+
+ if (sample_count > 2)
+ { psf_log_printf (psf, "*** Sample count is less than 16 but more than 1.\n") ;
+ psf_log_printf (psf, " sample count : %d sample_sizes [%d] : %d\n",
+ sample_count, sample_count - 1, sample_sizes [sample_count - 1]) ;
+ return SFE_XI_EXCESS_SAMPLES ;
+ } ;
+
+ psf->dataoffset = psf_fseek (psf, 0, SEEK_CUR) ;
+ psf_log_printf (psf, "Data Offset : %D\n", psf->dataoffset) ;
+
+ psf->datalength = sample_sizes [0] ;
+
+ if (psf->dataoffset + psf->datalength > psf->filelength)
+ { psf_log_printf (psf, "*** File seems to be truncated. Should be at least %D bytes long.\n",
+ psf->dataoffset + sample_sizes [0]) ;
+ psf->datalength = psf->filelength - psf->dataoffset ;
+ } ;
+
+ if (psf_fseek (psf, psf->dataoffset, SEEK_SET) != psf->dataoffset)
+ return SFE_BAD_SEEK ;
+
+ psf->endian = SF_ENDIAN_LITTLE ;
+ psf->sf.channels = 1 ; /* Always mono */
+ psf->sf.samplerate = 44100 ; /* Always */
+
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ if (! psf->sf.frames && psf->blockwidth)
+ psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
+
+ psf->instrument->basenote = 0 ;
+ psf->instrument->gain = 1 ;
+ psf->instrument->velocity_lo = psf->instrument->key_lo = 0 ;
+ psf->instrument->velocity_hi = psf->instrument->key_hi = 127 ;
+
+ return 0 ;
+} /* xi_read_header */
+
+/*==============================================================================
+*/
+
+static void dsc2s_array (XI_PRIVATE *pxi, signed char *src, int count, short *dest) ;
+static void dsc2i_array (XI_PRIVATE *pxi, signed char *src, int count, int *dest) ;
+static void dsc2f_array (XI_PRIVATE *pxi, signed char *src, int count, float *dest, float normfact) ;
+static void dsc2d_array (XI_PRIVATE *pxi, signed char *src, int count, double *dest, double normfact) ;
+
+static void dles2s_array (XI_PRIVATE *pxi, short *src, int count, short *dest) ;
+static void dles2i_array (XI_PRIVATE *pxi, short *src, int count, int *dest) ;
+static void dles2f_array (XI_PRIVATE *pxi, short *src, int count, float *dest, float normfact) ;
+static void dles2d_array (XI_PRIVATE *pxi, short *src, int count, double *dest, double normfact) ;
+
+static sf_count_t
+dpcm_read_dsc2s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ dsc2s_array (pxi, psf->u.scbuf, readcount, ptr + total) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dsc2s */
+
+static sf_count_t
+dpcm_read_dsc2i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ dsc2i_array (pxi, psf->u.scbuf, readcount, ptr + total) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dsc2i */
+
+static sf_count_t
+dpcm_read_dsc2f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x80) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ dsc2f_array (pxi, psf->u.scbuf, readcount, ptr + total, normfact) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dsc2f */
+
+static sf_count_t
+dpcm_read_dsc2d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x80) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ dsc2d_array (pxi, psf->u.scbuf, readcount, ptr + total, normfact) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dsc2d */
+
+/*------------------------------------------------------------------------------
+*/
+
+static sf_count_t
+dpcm_read_dles2s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ dles2s_array (pxi, psf->u.sbuf, readcount, ptr + total) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dles2s */
+
+static sf_count_t
+dpcm_read_dles2i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ dles2i_array (pxi, psf->u.sbuf, readcount, ptr + total) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dles2i */
+
+static sf_count_t
+dpcm_read_dles2f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ dles2f_array (pxi, psf->u.sbuf, readcount, ptr + total, normfact) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dles2f */
+
+static sf_count_t
+dpcm_read_dles2d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, readcount ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ dles2d_array (pxi, psf->u.sbuf, readcount, ptr + total, normfact) ;
+ total += readcount ;
+ if (readcount < bufferlen)
+ break ;
+ len -= readcount ;
+ } ;
+
+ return total ;
+} /* dpcm_read_dles2d */
+
+/*==============================================================================
+*/
+
+static void s2dsc_array (XI_PRIVATE *pxi, const short *src, signed char *dest, int count) ;
+static void i2dsc_array (XI_PRIVATE *pxi, const int *src, signed char *dest, int count) ;
+static void f2dsc_array (XI_PRIVATE *pxi, const float *src, signed char *dest, int count, float normfact) ;
+static void d2dsc_array (XI_PRIVATE *pxi, const double *src, signed char *dest, int count, double normfact) ;
+
+static void s2dles_array (XI_PRIVATE *pxi, const short *src, short *dest, int count) ;
+static void i2dles_array (XI_PRIVATE *pxi, const int *src, short *dest, int count) ;
+static void f2dles_array (XI_PRIVATE *pxi, const float *src, short *dest, int count, float normfact) ;
+static void d2dles_array (XI_PRIVATE *pxi, const double *src, short *dest, int count, double normfact) ;
+
+
+static sf_count_t
+dpcm_write_s2dsc (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ s2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen) ;
+ writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_s2dsc */
+
+static sf_count_t
+dpcm_write_i2dsc (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ i2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen) ;
+ writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_i2dsc */
+
+static sf_count_t
+dpcm_write_f2dsc (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7F) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ f2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen, normfact) ;
+ writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_f2dsc */
+
+static sf_count_t
+dpcm_write_d2dsc (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7F) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.ucbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ d2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen, normfact) ;
+ writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_d2dsc */
+
+
+static sf_count_t
+dpcm_write_s2dles (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ s2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen) ;
+ writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_s2dles */
+
+static sf_count_t
+dpcm_write_i2dles (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ i2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen) ;
+ writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_i2dles */
+
+static sf_count_t
+dpcm_write_f2dles (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ f2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen, normfact) ;
+ writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_f2dles */
+
+static sf_count_t
+dpcm_write_d2dles (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
+{ XI_PRIVATE *pxi ;
+ int bufferlen, writecount ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if ((pxi = psf->codec_data) == NULL)
+ return 0 ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ;
+
+ bufferlen = ARRAY_LEN (psf->u.sbuf) ;
+
+ while (len > 0)
+ { if (len < bufferlen)
+ bufferlen = (int) len ;
+ d2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen, normfact) ;
+ writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ;
+ total += writecount ;
+ if (writecount < bufferlen)
+ break ;
+ len -= writecount ;
+ } ;
+
+ return total ;
+} /* dpcm_write_d2dles */
+
+
+/*==============================================================================
+*/
+
+static void
+dsc2s_array (XI_PRIVATE *pxi, signed char *src, int count, short *dest)
+{ signed char last_val ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += src [k] ;
+ dest [k] = last_val << 8 ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* dsc2s_array */
+
+static void
+dsc2i_array (XI_PRIVATE *pxi, signed char *src, int count, int *dest)
+{ signed char last_val ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += src [k] ;
+ dest [k] = last_val << 24 ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* dsc2i_array */
+
+static void
+dsc2f_array (XI_PRIVATE *pxi, signed char *src, int count, float *dest, float normfact)
+{ signed char last_val ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += src [k] ;
+ dest [k] = last_val * normfact ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* dsc2f_array */
+
+static void
+dsc2d_array (XI_PRIVATE *pxi, signed char *src, int count, double *dest, double normfact)
+{ signed char last_val ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += src [k] ;
+ dest [k] = last_val * normfact ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* dsc2d_array */
+
+/*------------------------------------------------------------------------------
+*/
+
+static void
+s2dsc_array (XI_PRIVATE *pxi, const short *src, signed char *dest, int count)
+{ signed char last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = src [k] >> 8 ;
+ dest [k] = current - last_val ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* s2dsc_array */
+
+static void
+i2dsc_array (XI_PRIVATE *pxi, const int *src, signed char *dest, int count)
+{ signed char last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = src [k] >> 24 ;
+ dest [k] = current - last_val ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* i2dsc_array */
+
+static void
+f2dsc_array (XI_PRIVATE *pxi, const float *src, signed char *dest, int count, float normfact)
+{ signed char last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = lrintf (src [k] * normfact) ;
+ dest [k] = current - last_val ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* f2dsc_array */
+
+static void
+d2dsc_array (XI_PRIVATE *pxi, const double *src, signed char *dest, int count, double normfact)
+{ signed char last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 >> 8 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = lrint (src [k] * normfact) ;
+ dest [k] = current - last_val ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val << 8 ;
+} /* d2dsc_array */
+
+/*==============================================================================
+*/
+
+static void
+dles2s_array (XI_PRIVATE *pxi, short *src, int count, short *dest)
+{ short last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += LES2H_SHORT (src [k]) ;
+ dest [k] = last_val ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* dles2s_array */
+
+static void
+dles2i_array (XI_PRIVATE *pxi, short *src, int count, int *dest)
+{ short last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += LES2H_SHORT (src [k]) ;
+ dest [k] = last_val << 16 ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* dles2i_array */
+
+static void
+dles2f_array (XI_PRIVATE *pxi, short *src, int count, float *dest, float normfact)
+{ short last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += LES2H_SHORT (src [k]) ;
+ dest [k] = last_val * normfact ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* dles2f_array */
+
+static void
+dles2d_array (XI_PRIVATE *pxi, short *src, int count, double *dest, double normfact)
+{ short last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { last_val += LES2H_SHORT (src [k]) ;
+ dest [k] = last_val * normfact ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* dles2d_array */
+
+/*------------------------------------------------------------------------------
+*/
+
+static void
+s2dles_array (XI_PRIVATE *pxi, const short *src, short *dest, int count)
+{ short diff, last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { diff = src [k] - last_val ;
+ dest [k] = LES2H_SHORT (diff) ;
+ last_val = src [k] ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* s2dles_array */
+
+static void
+i2dles_array (XI_PRIVATE *pxi, const int *src, short *dest, int count)
+{ short diff, last_val ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { diff = (src [k] >> 16) - last_val ;
+ dest [k] = LES2H_SHORT (diff) ;
+ last_val = src [k] >> 16 ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* i2dles_array */
+
+static void
+f2dles_array (XI_PRIVATE *pxi, const float *src, short *dest, int count, float normfact)
+{ short diff, last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = lrintf (src [k] * normfact) ;
+ diff = current - last_val ;
+ dest [k] = LES2H_SHORT (diff) ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* f2dles_array */
+
+static void
+d2dles_array (XI_PRIVATE *pxi, const double *src, short *dest, int count, double normfact)
+{ short diff, last_val, current ;
+ int k ;
+
+ last_val = pxi->last_16 ;
+
+ for (k = 0 ; k < count ; k++)
+ { current = lrint (src [k] * normfact) ;
+ diff = current - last_val ;
+ dest [k] = LES2H_SHORT (diff) ;
+ last_val = current ;
+ } ;
+
+ pxi->last_16 = last_val ;
+} /* d2dles_array */
+
+/*
+** Do not edit or modify anything in this comment block.
+** The arch-tag line is a file identity tag for the GNU Arch
+** revision control system.
+**
+** arch-tag: 1ab2dbe0-29af-4d80-9c6f-cb21b67521bc
+*/
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 01:22:46 +0000