2 ** Copyright (C) 2002-2004 Erik de Castro Lopo <erikd@mega-nerd.com>
4 ** This program is free software; you can redistribute it and/or modify
5 ** it under the terms of the GNU Lesser General Public License as published by
6 ** the Free Software Foundation; either version 2.1 of the License, or
7 ** (at your option) any later version.
9 ** This program is distributed in the hope that it will be useful,
10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ** GNU Lesser General Public License for more details.
14 ** You should have received a copy of the GNU Lesser General Public License
15 ** along with this program; if not, write to the Free Software
16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #if (ENABLE_EXPERIMENTAL_CODE == 0)
33 dwd_open (SF_PRIVATE *psf)
35 return SFE_UNIMPLEMENTED ;
41 /*------------------------------------------------------------------------------
42 ** Macros to handle big/little endian issues.
45 #define SFE_DWD_NO_DWD 1666
46 #define SFE_DWD_BAND_BIT_WIDTH 1667
47 #define SFE_DWD_COMPRESSION 1668
49 #define DWD_IDENTIFIER "DiamondWare Digitized\n\0\x1a"
50 #define DWD_IDENTIFIER_LEN 24
52 #define DWD_HEADER_LEN 57
54 /*------------------------------------------------------------------------------
58 /*------------------------------------------------------------------------------
59 ** Private static functions.
62 static int dwd_read_header (SF_PRIVATE *psf) ;
64 static int dwd_close (SF_PRIVATE *psf) ;
66 /*------------------------------------------------------------------------------
71 dwd_open (SF_PRIVATE *psf)
72 { int subformat, error = 0 ;
74 if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
75 { if ((error = dwd_read_header (psf)))
79 if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_DWD)
80 return SFE_BAD_OPEN_FORMAT ;
82 subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
84 if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
86 /*-psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ;
87 if (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU)
88 psf->endian = SF_ENDIAN_LITTLE ;
89 else if (psf->endian != SF_ENDIAN_LITTLE)
90 psf->endian = SF_ENDIAN_BIG ;
92 if (! (encoding = dwd_write_header (psf, SF_FALSE)))
95 psf->write_header = dwd_write_header ;
99 psf->container_close = dwd_close ;
101 /*-psf->blockwidth = psf->bytewidth * psf->sf.channels ;-*/
106 /*------------------------------------------------------------------------------
110 dwd_close (SF_PRIVATE *psf)
117 /* This struct contains all the fields of interest om the DWD header, but does not
118 ** do so in the same order and layout as the actual file, header.
119 ** No assumptions are made about the packing of this struct.
122 { unsigned char major, minor, compression, channels, bitwidth ;
123 unsigned short srate, maxval ;
124 unsigned int id, datalen, frames, offset ;
128 dwd_read_header (SF_PRIVATE *psf)
131 memset (psf->u.cbuf, 0, sizeof (psf->u.cbuf)) ;
132 /* Set position to start of file to begin reading header. */
133 psf_binheader_readf (psf, "pb", 0, psf->u.cbuf, DWD_IDENTIFIER_LEN) ;
135 if (memcmp (psf->u.cbuf, DWD_IDENTIFIER, DWD_IDENTIFIER_LEN) != 0)
136 return SFE_DWD_NO_DWD ;
138 psf_log_printf (psf, "Read only : DiamondWare Digitized (.dwd)\n", psf->u.cbuf) ;
140 psf_binheader_readf (psf, "11", &dwdh.major, &dwdh.minor) ;
141 psf_binheader_readf (psf, "e4j1", &dwdh.id, 1, &dwdh.compression) ;
142 psf_binheader_readf (psf, "e211", &dwdh.srate, &dwdh.channels, &dwdh.bitwidth) ;
143 psf_binheader_readf (psf, "e24", &dwdh.maxval, &dwdh.datalen) ;
144 psf_binheader_readf (psf, "e44", &dwdh.frames, &dwdh.offset) ;
146 psf_log_printf (psf, " Version Major : %d\n Version Minor : %d\n Unique ID : %08X\n",
147 dwdh.major, dwdh.minor, dwdh.id) ;
148 psf_log_printf (psf, " Compression : %d => ", dwdh.compression) ;
150 if (dwdh.compression != 0)
151 { psf_log_printf (psf, "Unsupported compression\n") ;
152 return SFE_DWD_COMPRESSION ;
155 psf_log_printf (psf, "None\n") ;
157 psf_log_printf (psf, " Sample Rate : %d\n Channels : %d\n"
159 dwdh.srate, dwdh.channels, dwdh.bitwidth) ;
161 switch (dwdh.bitwidth)
163 psf->sf.format = SF_FORMAT_DWD | SF_FORMAT_PCM_S8 ;
168 psf->sf.format = SF_FORMAT_DWD | SF_FORMAT_PCM_16 ;
173 psf_log_printf (psf, "*** Bad bit width %d\n", dwdh.bitwidth) ;
174 return SFE_DWD_BAND_BIT_WIDTH ;
177 if (psf->filelength != dwdh.offset + dwdh.datalen)
178 { psf_log_printf (psf, " Data Length : %d (should be %D)\n", dwdh.datalen, psf->filelength - dwdh.offset) ;
179 dwdh.datalen = (unsigned int) (psf->filelength - dwdh.offset) ;
182 psf_log_printf (psf, " Data Length : %d\n", dwdh.datalen) ;
184 psf_log_printf (psf, " Max Value : %d\n", dwdh.maxval) ;
185 psf_log_printf (psf, " Frames : %d\n", dwdh.frames) ;
186 psf_log_printf (psf, " Data Offset : %d\n", dwdh.offset) ;
188 psf->datalength = dwdh.datalen ;
189 psf->dataoffset = dwdh.offset ;
191 psf->endian = SF_ENDIAN_LITTLE ;
193 psf->sf.samplerate = dwdh.srate ;
194 psf->sf.channels = dwdh.channels ;
195 psf->sf.sections = 1 ;
197 return pcm_init (psf) ;
198 } /* dwd_read_header */
200 /*------------------------------------------------------------------------------
205 ** Do not edit or modify anything in this comment block.
206 ** The arch-tag line is a file identity tag for the GNU Arch
207 ** revision control system.
209 ** arch-tag: a5e1d2a6-a840-4039-a0e7-e1a43eb05a4f