// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// Copyright(C) 2007 Simon Howard
//
// 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., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
//    PC speaker interface.
//
//-----------------------------------------------------------------------------

#include "z_zone.h"

#include "pcsound.h"

#ifdef USE_WIN32_PCSOUND_DRIVER
extern pcsound_driver_t pcsound_win32_driver;
#endif

#ifdef HAVE_LINUX_KD_H
extern pcsound_driver_t pcsound_linux_driver;
#endif

extern pcsound_driver_t pcsound_sdl_driver;

static pcsound_driver_t *drivers[] = {
#ifdef HAVE_LINUX_KD_H
  &pcsound_linux_driver,
#endif
#ifdef USE_WIN32_PCSOUND_DRIVER
  &pcsound_win32_driver,
#endif
  &pcsound_sdl_driver,
  NULL,
};

static pcsound_driver_t *pcsound_driver = NULL;

int PCSound_Init(pcsound_callback_func callback_func) {
  char *driver_name;
  int i;

  if (pcsound_driver != NULL) {
    return 1;
  }

  // Check if the environment variable is set

  driver_name = getenv("PCSOUND_DRIVER");

  if (driver_name != NULL) {
    for (i = 0; drivers[i] != NULL; i++) {
      if (!strcasecmp(drivers[i]->name, driver_name)) {
        // Found the driver!
        if (drivers[i]->init_func(callback_func)) {
          pcsound_driver = drivers[i];
        }
        else {
          D_MsgLocalWarn("Failed to initialise PC sound driver: %s\n",
            drivers[i]->name
          );
          break;
        }
      }
    }
  }
  else {
    // Try all drivers until we find a working one

    for (i = 0; drivers[i] != NULL; i++) {
      if (drivers[i]->init_func(callback_func)) {
        pcsound_driver = drivers[i];
        break;
      }
    }
  }
    
  if (pcsound_driver != NULL) {
    D_MsgLocalInfo("Using PC sound driver: %s\n", pcsound_driver->name);
    return 1;
  }
  else {
    D_MsgLocalWarn("Failed to find a working PC sound driver.\n");
    return 0;
  }
}

void PCSound_Shutdown(void) {
  pcsound_driver->shutdown_func();
  pcsound_driver = NULL;
}

/* vi: set et ts=2 sw=2: */

