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 /*------------------------------------------------------------------------------
31 ** Macros to handle big/little endian issues.
34 #define PVF1_MARKER (MAKE_MARKER ('P', 'V', 'F', '1'))
36 /*------------------------------------------------------------------------------
37 ** Private static functions.
40 static int pvf_close (SF_PRIVATE *psf) ;
42 static int pvf_write_header (SF_PRIVATE *psf, int calc_length) ;
43 static int pvf_read_header (SF_PRIVATE *psf) ;
45 /*------------------------------------------------------------------------------
50 pvf_open (SF_PRIVATE *psf)
54 if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
55 { if ((error = pvf_read_header (psf)))
59 subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
61 if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
62 { if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_PVF)
63 return SFE_BAD_OPEN_FORMAT ;
65 psf->endian = SF_ENDIAN_BIG ;
67 if (pvf_write_header (psf, SF_FALSE))
70 psf->write_header = pvf_write_header ;
73 psf->container_close = pvf_close ;
75 psf->blockwidth = psf->bytewidth * psf->sf.channels ;
78 { case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */
79 case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
80 case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
81 error = pcm_init (psf) ;
90 /*------------------------------------------------------------------------------
94 pvf_close (SF_PRIVATE *psf)
102 pvf_write_header (SF_PRIVATE *psf, int calc_length)
103 { sf_count_t current ;
105 if (psf->pipeoffset > 0)
108 calc_length = calc_length ; /* Avoid a compiler warning. */
110 current = psf_ftell (psf) ;
112 /* Reset the current header length to zero. */
113 psf->header [0] = 0 ;
116 if (psf->is_pipe == SF_FALSE)
117 psf_fseek (psf, 0, SEEK_SET) ;
119 LSF_SNPRINTF ((char*) psf->header, sizeof (psf->header), "PVF1\n%d %d %d\n",
120 psf->sf.channels, psf->sf.samplerate, psf->bytewidth * 8) ;
122 psf->headindex = strlen ((char*) psf->header) ;
124 /* Header construction complete so write it out. */
125 psf_fwrite (psf->header, psf->headindex, 1, psf) ;
130 psf->dataoffset = psf->headindex ;
133 psf_fseek (psf, current, SEEK_SET) ;
136 } /* pvf_write_header */
139 pvf_read_header (SF_PRIVATE *psf)
141 int marker, channels, samplerate, bitwidth ;
143 psf_binheader_readf (psf, "pmj", 0, &marker, 1) ;
144 psf_log_printf (psf, "%M\n", marker) ;
146 if (marker != PVF1_MARKER)
147 return SFE_PVF_NO_PVF1 ;
149 /* Grab characters up until a newline which is replaced by an EOS. */
150 psf_binheader_readf (psf, "G", buffer, sizeof (buffer)) ;
152 if (sscanf (buffer, "%d %d %d", &channels, &samplerate, &bitwidth) != 3)
153 return SFE_PVF_BAD_HEADER ;
155 psf_log_printf (psf, " Channels : %d\n Sample rate : %d\n Bit width : %d\n",
156 channels, samplerate, bitwidth) ;
158 psf->sf.channels = channels ;
159 psf->sf.samplerate = samplerate ;
163 psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_S8 ;
168 psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_16 ;
172 psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_32 ;
177 return SFE_PVF_BAD_BITWIDTH ;
180 psf->dataoffset = psf_ftell (psf) ;
181 psf_log_printf (psf, " Data Offset : %D\n", psf->dataoffset) ;
183 psf->endian = SF_ENDIAN_BIG ;
185 psf->datalength = psf->filelength - psf->dataoffset ;
186 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
188 if (! psf->sf.frames && psf->blockwidth)
189 psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
192 } /* pvf_read_header */
194 ** Do not edit or modify anything in this comment block.
195 ** The arch-tag line is a file identity tag for the GNU Arch
196 ** revision control system.
198 ** arch-tag: 20a26761-8bc1-41d7-b1f3-9793bf3d9864