1 /* Simple example of using SoX libraries
2 *
3 * Copyright (c) 2009 robs@users.sourceforge.net
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13 * Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
21 #undef NDEBUG /* Must undef above assert.h or other that might include it. */
22 #endif
23
24 #include "sox.h"
25 #include "util.h"
26 #include <stdio.h>
27 #include <assert.h>
28
29 /* Example of reading and writing audio files stored in memory buffers
30 * rather than actual files.
31 *
32 * Usage: example5 input output
33 */
34
35 /* Uncomment following line for fixed instead of malloc'd buffer: */
36 /*#define FIXED_BUFFER */
37
38 #if defined FIXED_BUFFER
39 #define buffer_size 123456
40 static char buffer[buffer_size];
41 #endif
42
main(int argc,char * argv[])43 int main(int argc, char * argv[])
44 {
45 static sox_format_t * in, * out; /* input and output files */
46 #define MAX_SAMPLES (size_t)2048
47 sox_sample_t samples[MAX_SAMPLES]; /* Temporary store whilst copying. */
48 #if !defined FIXED_BUFFER
49 char * buffer;
50 size_t buffer_size;
51 #endif
52 size_t number_read;
53
54 assert(argc == 3);
55
56 /* All libSoX applications must start by initialising the SoX library */
57 assert(sox_init() == SOX_SUCCESS);
58
59 /* Open the input file (with default parameters) */
60 assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
61 #if defined FIXED_BUFFER
62 assert((out = sox_open_mem_write(buffer, buffer_size, &in->signal, NULL, "sox", NULL)));
63 #else
64 assert((out = sox_open_memstream_write(&buffer, &buffer_size, &in->signal, NULL, "sox", NULL)));
65 #endif
66 while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
67 assert(sox_write(out, samples, number_read) == number_read);
68 sox_close(out);
69 sox_close(in);
70
71 assert((in = sox_open_mem_read(buffer, buffer_size, NULL, NULL, NULL)));
72 assert((out = sox_open_write(argv[2], &in->signal, NULL, NULL, NULL, NULL)));
73 while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
74 assert(sox_write(out, samples, number_read) == number_read);
75 sox_close(out);
76 sox_close(in);
77 #if !defined FIXED_BUFFER
78 free(buffer);
79 #endif
80
81 sox_quit();
82 return 0;
83 }
84