1 /* libSoX file format: Psion wve (c) 2008 robs@users.sourceforge.net
2 *
3 * See http://filext.com/file-extension/WVE
4 *
5 * This library is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU Lesser General Public License as published by
7 * the Free Software Foundation; either version 2.1 of the License, or (at
8 * your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include "sox_i.h"
21 #include <string.h>
22
23 static char const ID1[18] = "ALawSoundFile**\0\017\020";
24 static char const ID2[] = {0,0,0,1,0,0,0,0,0,0}; /* pad & repeat info: ignore */
25
start_read(sox_format_t * ft)26 static int start_read(sox_format_t * ft)
27 {
28 char buf[sizeof(ID1)];
29 uint32_t num_samples;
30
31 if (lsx_readchars(ft, buf, sizeof(buf)) || lsx_readdw(ft, &num_samples) ||
32 lsx_skipbytes(ft, sizeof(ID2)))
33 return SOX_EOF;
34 if (memcmp(ID1, buf, sizeof(buf))) {
35 lsx_fail_errno(ft, SOX_EHDR, "wve: can't find Psion identifier");
36 return SOX_EOF;
37 }
38 return lsx_check_read_params(ft, 1, 8000., SOX_ENCODING_ALAW, 8, (uint64_t)num_samples, sox_true);
39 }
40
write_header(sox_format_t * ft)41 static int write_header(sox_format_t * ft)
42 {
43 uint64_t size64 = ft->olength? ft->olength:ft->signal.length;
44 unsigned size = size64 > UINT_MAX ? 0 : (unsigned)size64;
45 return lsx_writechars(ft, ID1, sizeof(ID1))
46 || lsx_writedw(ft, size)
47 || lsx_writechars(ft, ID2, sizeof(ID2))? SOX_EOF:SOX_SUCCESS;
48 }
49
LSX_FORMAT_HANDLER(wve)50 LSX_FORMAT_HANDLER(wve)
51 {
52 static char const * const names[] = {"wve", NULL};
53 static sox_rate_t const write_rates[] = {8000, 0};
54 static unsigned const write_encodings[] = {SOX_ENCODING_ALAW, 8, 0, 0};
55 static sox_format_handler_t const handler = {SOX_LIB_VERSION_CODE,
56 "Psion 3 audio format",
57 names, SOX_FILE_BIG_END | SOX_FILE_MONO | SOX_FILE_REWIND,
58 start_read, lsx_rawread, NULL,
59 write_header, lsx_rawwrite, NULL,
60 lsx_rawseek, write_encodings, write_rates, 0
61 };
62 return &handler;
63 }
64