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/*
** Copyright (C) 2002-2011 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 <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
#if (ENABLE_EXPERIMENTAL_CODE == 0)
int
dwd_open (SF_PRIVATE *psf)
{ if (psf)
return SFE_UNIMPLEMENTED ;
return 0 ;
} /* dwd_open */
#else
/*------------------------------------------------------------------------------
** Macros to handle big/little endian issues.
*/
#define SFE_DWD_NO_DWD 1666
#define SFE_DWD_BAND_BIT_WIDTH 1667
#define SFE_DWD_COMPRESSION 1668
#define DWD_IDENTIFIER "DiamondWare Digitized\n\0\x1a"
#define DWD_IDENTIFIER_LEN 24
#define DWD_HEADER_LEN 57
/*------------------------------------------------------------------------------
** Typedefs.
*/
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int dwd_read_header (SF_PRIVATE *psf) ;
static int dwd_close (SF_PRIVATE *psf) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
dwd_open (SF_PRIVATE *psf)
{ int error = 0 ;
if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = dwd_read_header (psf)))
return error ;
} ;
if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_DWD)
return SFE_BAD_OPEN_FORMAT ;
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
{
/*-psf->endian = SF_ENDIAN (psf->sf.format) ;
if (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU)
psf->endian = SF_ENDIAN_LITTLE ;
else if (psf->endian != SF_ENDIAN_LITTLE)
psf->endian = SF_ENDIAN_BIG ;
if (! (encoding = dwd_write_header (psf, SF_FALSE)))
return psf->error ;
psf->write_header = dwd_write_header ;
-*/
} ;
psf->container_close = dwd_close ;
/*-psf->blockwidth = psf->bytewidth * psf->sf.channels ;-*/
return error ;
} /* dwd_open */
/*------------------------------------------------------------------------------
*/
static int
dwd_close (SF_PRIVATE * UNUSED (psf))
{
return 0 ;
} /* dwd_close */
/* This struct contains all the fields of interest om the DWD header, but does not
** do so in the same order and layout as the actual file, header.
** No assumptions are made about the packing of this struct.
*/
typedef struct
{ unsigned char major, minor, compression, channels, bitwidth ;
unsigned short srate, maxval ;
unsigned int id, datalen, frames, offset ;
} DWD_HEADER ;
static int
dwd_read_header (SF_PRIVATE *psf)
{ DWD_HEADER dwdh ;
memset (psf->u.cbuf, 0, sizeof (psf->u.cbuf)) ;
/* Set position to start of file to begin reading header. */
psf_binheader_readf (psf, "pb", 0, psf->u.cbuf, DWD_IDENTIFIER_LEN) ;
if (memcmp (psf->u.cbuf, DWD_IDENTIFIER, DWD_IDENTIFIER_LEN) != 0)
return SFE_DWD_NO_DWD ;
psf_log_printf (psf, "Read only : DiamondWare Digitized (.dwd)\n", psf->u.cbuf) ;
psf_binheader_readf (psf, "11", &dwdh.major, &dwdh.minor) ;
psf_binheader_readf (psf, "e4j1", &dwdh.id, 1, &dwdh.compression) ;
psf_binheader_readf (psf, "e211", &dwdh.srate, &dwdh.channels, &dwdh.bitwidth) ;
psf_binheader_readf (psf, "e24", &dwdh.maxval, &dwdh.datalen) ;
psf_binheader_readf (psf, "e44", &dwdh.frames, &dwdh.offset) ;
psf_log_printf (psf, " Version Major : %d\n Version Minor : %d\n Unique ID : %08X\n",
dwdh.major, dwdh.minor, dwdh.id) ;
psf_log_printf (psf, " Compression : %d => ", dwdh.compression) ;
if (dwdh.compression != 0)
{ psf_log_printf (psf, "Unsupported compression\n") ;
return SFE_DWD_COMPRESSION ;
}
else
psf_log_printf (psf, "None\n") ;
psf_log_printf (psf, " Sample Rate : %d\n Channels : %d\n"
" Bit Width : %d\n",
dwdh.srate, dwdh.channels, dwdh.bitwidth) ;
switch (dwdh.bitwidth)
{ case 8 :
psf->sf.format = SF_FORMAT_DWD | SF_FORMAT_PCM_S8 ;
psf->bytewidth = 1 ;
break ;
case 16 :
psf->sf.format = SF_FORMAT_DWD | SF_FORMAT_PCM_16 ;
psf->bytewidth = 2 ;
break ;
default :
psf_log_printf (psf, "*** Bad bit width %d\n", dwdh.bitwidth) ;
return SFE_DWD_BAND_BIT_WIDTH ;
} ;
if (psf->filelength != dwdh.offset + dwdh.datalen)
{ psf_log_printf (psf, " Data Length : %d (should be %D)\n", dwdh.datalen, psf->filelength - dwdh.offset) ;
dwdh.datalen = (unsigned int) (psf->filelength - dwdh.offset) ;
}
else
psf_log_printf (psf, " Data Length : %d\n", dwdh.datalen) ;
psf_log_printf (psf, " Max Value : %d\n", dwdh.maxval) ;
psf_log_printf (psf, " Frames : %d\n", dwdh.frames) ;
psf_log_printf (psf, " Data Offset : %d\n", dwdh.offset) ;
psf->datalength = dwdh.datalen ;
psf->dataoffset = dwdh.offset ;
psf->endian = SF_ENDIAN_LITTLE ;
psf->sf.samplerate = dwdh.srate ;
psf->sf.channels = dwdh.channels ;
psf->sf.sections = 1 ;
return pcm_init (psf) ;
} /* dwd_read_header */
/*------------------------------------------------------------------------------
*/
#endif
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