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/* 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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