shithub: sox

ref: 021c7886e4ecfe58022848aa3f4877e1986e3089
dir: /src/cdr.c/

/* libSoX file format: cdda   (c) 2006-8 SoX contributors
 * Based on an original idea by David Elliott
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * This library 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 Lesser
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "sox_i.h"

static int start(sox_format_t * ft)
{
  return lsx_check_read_params(ft, 2, 44100., SOX_ENCODING_SIGN2, 16, (uint64_t)0, sox_true);
}

static int stopwrite(sox_format_t * ft)
{
  unsigned const sector_num_samples = 588 * ft->signal.channels;
  unsigned i = ft->olength % sector_num_samples;

  if (i) while (i++ < sector_num_samples)    /* Pad with silence to multiple */
    lsx_writew(ft, 0);                       /* of 1/75th of a second. */
  return SOX_SUCCESS;
}

LSX_FORMAT_HANDLER(cdr)
{
  static char const * const names[] = {"cdda", "cdr", NULL};
  static unsigned const write_encodings[] = {SOX_ENCODING_SIGN2, 16, 0, 0};
  static sox_rate_t const write_rates[] = {44100, 0};
  static sox_format_handler_t handler = {SOX_LIB_VERSION_CODE,
    "Red Book Compact Disc Digital Audio",
    names, SOX_FILE_BIG_END|SOX_FILE_STEREO,
    start, lsx_rawread, NULL,
    NULL, lsx_rawwrite, stopwrite,
    lsx_rawseek, write_encodings, write_rates, 0
  };
  return &handler;
}