/*
 *  decode_a52.c
 *
 *  Copyright (C) Thomas Oestreich - June 2001
 *
 *  This file is part of transcode, a video stream processing tool
 *
 *  transcode 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, or (at your option)
 *  any later version.
 *
 *  transcode 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 GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "transcode.h"
#include "libtc/libtc.h"
#include "tcinfo.h"

#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
# ifdef OS_DARWIN
#  include "libdldarwin/dlfcn.h"
# endif
#endif

#include "ioaux.h"
#include "tc.h"

static char *mod_path=MOD_PATH;

#define MODULE "a52_decore.so"

// dl stuff
static int (*p_a52_decore)(decode_t *decode);
static void *handle;
static char module[TC_BUF_MAX];

static int a52_do_init(char *path) {
    const char *error;

    tc_snprintf(module, sizeof(module), "%s/%s", path, MODULE);

    if(verbose & TC_DEBUG)
	tc_log_msg(__FILE__, "loading external module %s", module);

    // try transcode's module directory
    handle = dlopen(module, RTLD_NOW);
    if (!handle) {
      //try the default:
      //      handle = dlopen(MODULE, RTLD_GLOBAL| RTLD_LAZY);
      if (!handle) {
	error = dlerror();
	fputs (error, stderr);
	fputs("\n", stderr);
	return(-1);
      }
    }

    p_a52_decore = dlsym(handle, "a52_decore");
    if ((error = dlerror()) != NULL)  {
      fputs(error, stderr);
      fputs("\n", stderr);
      return(-1);
    }

    return(0);
}

/* ------------------------------------------------------------
 *
 * decoder thread
 *
 * ------------------------------------------------------------*/

void decode_a52(decode_t *decode)
{
  verbose = decode->verbose;

  //load the codec
  if(a52_do_init(mod_path)<0) {
    tc_log_error(__FILE__, "failed to init ATSC A-52 stream decoder");
    import_exit(1);
  }

  (*p_a52_decore)(decode);
  dlclose(handle);
  import_exit(0);
}