/* libSoX SoundTool format handler          (c) 2008 robs@users.sourceforge.net * See description in sndtl26.zip on the net. * * 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 2.1 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, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA */ #include "sox_i.h"#include <string.h> static char const ID1[6] = "SOUND\x1a";#define text_field_len (size_t)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 (lsx_readchars(ft, id1, sizeof(ID1)) ||      lsx_skipbytes(ft, (size_t) 10) || lsx_readdw(ft, &nsamples) ||      lsx_readw(ft, &rate) || lsx_skipbytes(ft, (size_t) 6) ||      lsx_readchars(ft, comments, text_field_len))    return SOX_EOF;  if (memcmp(ID1, id1, sizeof(id1))) {    lsx_fail_errno(ft, SOX_EHDR, "soundtool: can't find SoundTool identifier");    return SOX_EOF;  }  comments[text_field_len] = '\0'; /* Be defensive against incorrect files */  sox_append_comments(&ft->oob.comments, comments);  return lsx_check_read_params(ft, 1, (sox_rate_t)rate, SOX_ENCODING_UNSIGNED, 8, (uint64_t)nsamples, sox_true);} static int write_header(sox_format_t * ft){  char * comment = lsx_cat_comments(ft->oob.comments);  char text_buf[text_field_len];  uint64_t length = ft->olength? ft->olength:ft->signal.length;   memset(text_buf, 0, sizeof(text_buf));  strncpy(text_buf, comment, text_field_len - 1);  free(comment);  return lsx_writechars(ft, ID1, sizeof(ID1))      || lsx_writew  (ft, 0)      /* GSound: not used */      || lsx_writedw (ft, (unsigned) length) /* length of complete sample */      || lsx_writedw (ft, 0)      /* first byte to play from sample */      || lsx_writedw (ft, (unsigned) length) /* first byte NOT to play from sample */      || lsx_writew  (ft, min(65535, (unsigned)(ft->signal.rate + .5)))      || lsx_writew  (ft, 0)      /* sample size/type */      || lsx_writew  (ft, 10)     /* speaker driver volume */      || lsx_writew  (ft, 4)      /* speaker driver DC shift */      || lsx_writechars(ft, text_buf, sizeof(text_buf))?  SOX_EOF:SOX_SUCCESS;} LSX_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, lsx_rawread, NULL,    write_header, lsx_rawwrite, NULL,    lsx_rawseek, write_encodings, NULL, 0  };  return &handler;}