/* 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: example_test_mem input output trim_start trim_end
 * Compile: gcc -o example_test_mem example_test_mem.c -lsox -Wall -Wextra -g I/path/to/sox.h
 */

/* 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 == 5);

  printf("\nGiven input:\n%s %s %s %s %s\n\n", argv[0], argv[1], argv[2], argv[3], argv[4]);

  /* 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);


  /* output file */
  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));


  /* some encoding stuf here */
  sox_effects_chain_t * chain;
  sox_effect_t * e;
  char * args[10];

  /* effect chain */
  chain = sox_create_effects_chain(&in->encoding, &out->encoding);


  e = sox_create_effect(sox_find_effect("input"));
  args[0] = (char *)in, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
  /* This becomes the first `effect' in the chain */
  assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
  free(e);

  e = sox_create_effect(sox_find_effect("trim"));
  args[0] = argv[3], args[1] = argv[4], assert(sox_effect_options(e, 2, args) == SOX_SUCCESS);
  /* Add the effect to the end of the effects processing chain: */
  assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
  free(e);

  e = sox_create_effect(sox_find_effect("output"));
  args[0] = (char *)out, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
  assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
  free(e);

  /* Flow samples through the effects processing chain until EOF is reached */
  sox_flow_effects(chain, NULL, NULL);
  /* All done; tidy up: */
  sox_delete_effects_chain(chain);

  /* write to disk */
  //while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
  //  assert(sox_write(out, samples, number_read) == number_read);

  /* close in & out */
  sox_close(out);
  sox_close(in);

#if !defined FIXED_BUFFER
  free(buffer);
#endif

  sox_quit();
  return 0;
}