diff options
Diffstat (limited to 'libs/libsndfile/src/dwd.c')
| -rw-r--r-- | libs/libsndfile/src/dwd.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/libs/libsndfile/src/dwd.c b/libs/libsndfile/src/dwd.c new file mode 100644 index 0000000000..a33bae0c8e --- /dev/null +++ b/libs/libsndfile/src/dwd.c @@ -0,0 +1,210 @@ +/* +** Copyright (C) 2002-2004 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 (psf && 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 subformat, error = 0 ; + + if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0)) + { if ((error = dwd_read_header (psf))) + return error ; + } ; + + if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_DWD) + return SFE_BAD_OPEN_FORMAT ; + + subformat = psf->sf.format & SF_FORMAT_SUBMASK ; + + if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR) + { + /*-psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ; + 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 *psf) +{ + psf = 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 +/* +** 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: a5e1d2a6-a840-4039-a0e7-e1a43eb05a4f +*/ |