1 /* libSoX effect: Output audio to a file (c) 2008 robs@users.sourceforge.net
2 *
3 * This library is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU Lesser General Public License as published by
5 * the Free Software Foundation; either version 2.1 of the License, or (at
6 * your option) any later version.
7 *
8 * This library is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 */
17
18 #include "sox_i.h"
19
20 typedef struct {sox_format_t * file;} priv_t;
21
getopts(sox_effect_t * effp,int argc,char ** argv)22 static int getopts(sox_effect_t * effp, int argc, char * * argv)
23 {
24 priv_t * p = (priv_t *)effp->priv;
25 if (argc != 2 || !(p->file = (sox_format_t *)argv[1]) || p->file->mode != 'w')
26 return SOX_EOF;
27 return SOX_SUCCESS;
28 }
29
flow(sox_effect_t * effp,sox_sample_t const * ibuf,sox_sample_t * obuf,size_t * isamp,size_t * osamp)30 static int flow(sox_effect_t *effp, sox_sample_t const * ibuf,
31 sox_sample_t * obuf, size_t * isamp, size_t * osamp)
32 {
33 priv_t * p = (priv_t *)effp->priv;
34 /* Write out *isamp samples */
35 size_t len = sox_write(p->file, ibuf, *isamp);
36
37 /* len is the number of samples that were actually written out; if this is
38 * different to *isamp, then something has gone wrong--most often, it's
39 * out of disc space */
40 if (len != *isamp) {
41 lsx_fail("%s: %s", p->file->filename, p->file->sox_errstr);
42 return SOX_EOF;
43 }
44
45 /* Outputting is the last `effect' in the effect chain so always passes
46 * 0 samples on to the next effect (as there isn't one!) */
47 (void)obuf, *osamp = 0;
48 return SOX_SUCCESS; /* All samples output successfully */
49 }
50
lsx_output_effect_fn(void)51 sox_effect_handler_t const * lsx_output_effect_fn(void)
52 {
53 static sox_effect_handler_t handler = {
54 "output", NULL, SOX_EFF_MCHAN | SOX_EFF_INTERNAL,
55 getopts, NULL, flow, NULL, NULL, NULL, sizeof(priv_t)
56 };
57 return &handler;
58 }
59
60