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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/* libSoX file format: Psion wve (c) 2008 robs@users.sourceforge.net
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*
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* See http://filext.com/file-extension/WVE
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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* General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "sox_i.h"
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#include <string.h>
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static char const ID1[18] = "ALawSoundFile**\0\017\020";
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static char const ID2[] = {0,0,0,1,0,0,0,0,0,0}; /* pad & repeat info: ignore */
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static int start_read(sox_format_t * ft)
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{
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char buf[sizeof(ID1)];
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uint32_t num_samples;
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if (lsx_readchars(ft, buf, sizeof(buf)) || lsx_readdw(ft, &num_samples) ||
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lsx_skipbytes(ft, sizeof(ID2)))
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return SOX_EOF;
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if (memcmp(ID1, buf, sizeof(buf))) {
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lsx_fail_errno(ft, SOX_EHDR, "wve: can't find Psion identifier");
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return SOX_EOF;
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}
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return lsx_check_read_params(ft, 1, 8000., SOX_ENCODING_ALAW, 8, (uint64_t)num_samples, sox_true);
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}
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static int write_header(sox_format_t * ft)
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{
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uint64_t size64 = ft->olength? ft->olength:ft->signal.length;
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unsigned size = size64 > UINT_MAX ? 0 : (unsigned)size64;
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return lsx_writechars(ft, ID1, sizeof(ID1))
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|| lsx_writedw(ft, size)
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|| lsx_writechars(ft, ID2, sizeof(ID2))? SOX_EOF:SOX_SUCCESS;
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}
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LSX_FORMAT_HANDLER(wve)
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{
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static char const * const names[] = {"wve", NULL};
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static sox_rate_t const write_rates[] = {8000, 0};
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static unsigned const write_encodings[] = {SOX_ENCODING_ALAW, 8, 0, 0};
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static sox_format_handler_t const handler = {SOX_LIB_VERSION_CODE,
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"Psion 3 audio format",
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names, SOX_FILE_BIG_END | SOX_FILE_MONO | SOX_FILE_REWIND,
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start_read, lsx_rawread, NULL,
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write_header, lsx_rawwrite, NULL,
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lsx_rawseek, write_encodings, write_rates, 0
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};
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return &handler;
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}
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