/* libSoX effect: Output audio to a file   (c) 2008 robs@users.sourceforge.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" typedef struct {sox_format_t * file;} priv_t; static int getopts(sox_effect_t * effp, int argc, char * * argv){  priv_t * p = (priv_t *)effp->priv;  if (argc != 2 || !(p->file = (sox_format_t *)argv[1]) || p->file->mode != 'w')    return SOX_EOF;  return SOX_SUCCESS;} static int flow(sox_effect_t *effp, sox_sample_t const * ibuf,    sox_sample_t * obuf, size_t * isamp, size_t * osamp){  priv_t * p = (priv_t *)effp->priv;  /* Write out *isamp samples */  size_t len = sox_write(p->file, ibuf, *isamp);   /* len is the number of samples that were actually written out; if this is   * different to *isamp, then something has gone wrong--most often, it's   * out of disc space */  if (len != *isamp) {    lsx_fail("%s: %s", p->file->filename, p->file->sox_errstr);    return SOX_EOF;  }   /* Outputting is the last `effect' in the effect chain so always passes   * 0 samples on to the next effect (as there isn't one!) */  (void)obuf, *osamp = 0;  return SOX_SUCCESS; /* All samples output successfully */} sox_effect_handler_t const * lsx_output_effect_fn(void){  static sox_effect_handler_t handler = {    "output", NULL, SOX_EFF_MCHAN | SOX_EFF_INTERNAL,    getopts, NULL, flow, NULL, NULL, NULL, sizeof(priv_t)  };  return &handler;}