| /* |
| ** 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 |
| |