/* 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 123456static 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;}