ref: 0141f233364b96bee00bee7463c494a981f50e55
dir: /src/soundtool.c/
/* * Sounder format handler (c) 2008 robs@users.sourceforge.net * Based on description in sndtl26.zip. * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library. If not, write to the Free Software Foundation, * Fifth Floor, 51 Franklin Street, Boston, MA 02111-1301, USA. */ #include "sox_i.h" #include <string.h> static char const ID1[6] = "SOUND\x1a"; #define text_field_len 96 /* Includes null-terminator */ static int start_read(sox_format_t * ft) { char id1[sizeof(ID1)], comments[text_field_len + 1]; uint32_t nsamples; uint16_t rate; if (sox_readchars(ft, id1, sizeof(ID1)) || sox_skipbytes(ft, 10) || sox_readdw(ft, &nsamples) || sox_readw(ft, &rate) || sox_skipbytes(ft, 6) || sox_readchars(ft, comments, text_field_len)) return SOX_EOF; if (memcmp(ID1, id1, sizeof(id1))) { sox_fail_errno(ft, SOX_EHDR, "soundtool: can't find SoundTool identifier"); return SOX_EOF; } comments[text_field_len] = '\0'; /* Be defensive against incorrect files */ append_comments(&ft->comments, comments); return sox_check_read_params(ft, 1, (sox_rate_t)rate, SOX_ENCODING_UNSIGNED, 8, (off_t)0); } static int write_header(sox_format_t * ft) { char * comment = cat_comments(ft->comments); char text_buf[text_field_len]; sox_size_t length = ft->olength? ft->olength:ft->length; memset(text_buf, 0, sizeof(text_buf)); strncpy(text_buf, comment, text_field_len - 1); free(comment); return sox_writechars(ft, ID1, sizeof(ID1)) || sox_writew (ft, 0) /* GSound: not used */ || sox_writedw (ft, length) /* length of complete sample */ || sox_writedw (ft, 0) /* first byte to play from sample */ || sox_writedw (ft, length) /* first byte NOT to play from sample */ || sox_writew (ft, min(65535, (unsigned)(ft->signal.rate + .5))) || sox_writew (ft, 0) /* sample size/type */ || sox_writew (ft, 10) /* speaker driver volume */ || sox_writew (ft, 4) /* speaker driver DC shift */ || sox_writechars(ft, text_buf, sizeof(text_buf))? SOX_EOF:SOX_SUCCESS; } SOX_FORMAT_HANDLER(soundtool) { static char const * const names[] = {"sndt", NULL}; static unsigned const write_encodings[] = {SOX_ENCODING_UNSIGNED, 8, 0, 0}; static sox_format_handler_t const handler = {SOX_LIB_VERSION_CODE, "8-bit linear audio as used by Martin Hepperle's `SoundTool' of 1991/2", names, SOX_FILE_LIT_END | SOX_FILE_MONO | SOX_FILE_REWIND, start_read, sox_rawread, NULL, write_header, sox_rawwrite, NULL, sox_rawseek, write_encodings, NULL }; return &handler; }