ref: b190c3d473a96a48c27c01186b1740ecd6753b87
dir: /src/example5.c/
/* Simple example of using SoX libraries
*
* Copyright (c) 2009 robs@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
#undef NDEBUG /* Must undef above assert.h or other that might include it. */
#endif
#include "sox.h"
#include "util.h"
#include <stdio.h>
#include <assert.h>
/* Example of reading and writing audio files stored in memory buffers
* rather than actual files.
*
* Usage: example5 input output
*/
/* Uncomment following line for fixed instead of malloc'd buffer: */
/*#define FIXED_BUFFER */
#if defined FIXED_BUFFER
#define buffer_size 123456
static char buffer[buffer_size];
#endif
int main(int argc, char * argv[])
{
static sox_format_t * in, * out; /* input and output files */
#define MAX_SAMPLES (size_t)2048
sox_sample_t samples[MAX_SAMPLES]; /* Temporary store whilst copying. */
#if !defined FIXED_BUFFER
char * buffer;
size_t buffer_size;
#endif
size_t number_read;
assert(argc == 3);
/* All libSoX applications must start by initialising the SoX library */
assert(sox_init() == SOX_SUCCESS);
/* Open the input file (with default parameters) */
assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
#if defined FIXED_BUFFER
assert((out = sox_open_mem_write(buffer, buffer_size, &in->signal, NULL, "sox", NULL)));
#else
assert((out = sox_open_memstream_write(&buffer, &buffer_size, &in->signal, NULL, "sox", NULL)));
#endif
while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
assert(sox_write(out, samples, number_read) == number_read);
sox_close(out);
sox_close(in);
assert((in = sox_open_mem_read(buffer, buffer_size, NULL, NULL, NULL)));
assert((out = sox_open_write(argv[2], &in->signal, NULL, NULL, NULL, NULL)));
while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
assert(sox_write(out, samples, number_read) == number_read);
sox_close(out);
sox_close(in);
#if !defined FIXED_BUFFER
free(buffer);
#endif
sox_quit();
return 0;
}