panthema / 2006 / SDIOS06 / sdios06 / src / supertux / sound.cpp (Download File)
//  $Id: sound.cpp 1741 2004-08-10 22:50:39Z rmcruz $
//
//  SuperTux -  A Jump'n Run
//  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
//  Copyright (C) 2004 Duong-Khang NGUYEN <neoneurone@users.sf.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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#include "defines.h"
#include "globals.h"
#include "sound.h"
#include "setup.h"

/*global variable*/
bool use_sound = true;    /* handle sound on/off menu and command-line option */
bool use_music = true;    /* handle music on/off menu and command-line option */
bool audio_device = true; /* != 0: available and initialized */

char * soundfilenames[NUM_SOUNDS] = {
                                       "/sounds/jump.wav",
                                       "/sounds/bigjump.wav",
                                       "/sounds/skid.wav",
                                       "/sounds/distro.wav",
                                       "/sounds/herring.wav",
                                       "/sounds/brick.wav",
                                       "/sounds/hurt.wav",
                                       "/sounds/squish.wav",
                                       "/sounds/fall.wav",
                                       "/sounds/ricochet.wav",
                                       "/sounds/bump-upgrade.wav",
                                       "/sounds/upgrade.wav",
                                       "/sounds/excellent.wav",
                                       "/sounds/coffee.wav",
                                       "/sounds/shoot.wav",
                                       "/sounds/lifeup.wav",
                                       "/sounds/stomp.wav",
                                       "/sounds/kick.wav",
                                       "/sounds/explode.wav",
                                       "/sounds/warp.wav"
                                    };

Mix_Chunk * sounds[NUM_SOUNDS];

/* --- OPEN THE AUDIO DEVICE --- */

int open_audio (int frequency, Uint16 format, int channels, int chunksize)
{
#ifndef NO_SDLMIXER
  if (Mix_OpenAudio( frequency, format, channels, chunksize ) < 0)
    return -1;

  // allocate 16 channels for mixing
  if (Mix_AllocateChannels(8)  != 8)
    return -2;
  
  /* reserve some channels and register panning effects */
  if (Mix_ReserveChannels(SOUND_RESERVED_CHANNELS) != SOUND_RESERVED_CHANNELS)
    return -3;

  /* prepare the spanning effects */
  Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
  Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
#endif
  return 0;
}


/* --- CLOSE THE AUDIO DEVICE --- */

void close_audio( void )
{
#ifndef NO_SDLMIXER
  if (audio_device) {
    Mix_UnregisterAllEffects( SOUND_LEFT_SPEAKER );
    Mix_UnregisterAllEffects( SOUND_RIGHT_SPEAKER );
    Mix_CloseAudio();
  }
#endif
}


/* --- LOAD A SOUND --- */

Mix_Chunk* load_sound(const std::string& file)
{
#ifndef NO_SDLMIXER
  if(!audio_device)
    return 0;
  
  Mix_Chunk* snd = Mix_LoadWAV(file.c_str());

  if (snd == 0)
    st_abort("Can't load", file);

  return(snd);
#else
  return 0;
#endif
}

/* --- PLAY A SOUND ON LEFT OR RIGHT OR CENTER SPEAKER --- */

void play_sound(Mix_Chunk * snd, enum Sound_Speaker whichSpeaker)
{
#ifndef NO_SDLMIXER
  /* this won't call the function if the user has disabled sound
   * either via menu or via command-line option
   */
  if(!audio_device || !use_sound)
    return;

  Mix_PlayChannel( whichSpeaker, snd, 0);

  /* prepare for panning effects for next call */
  switch (whichSpeaker) {
    case SOUND_LEFT_SPEAKER:
      Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
      break;
    case SOUND_RIGHT_SPEAKER:
      Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
      break;
    default:  // keep the compiler happy
      break;
  }
#endif
}

void free_chunk(Mix_Chunk *chunk)
{
#ifndef NO_SDLMIXER
  Mix_FreeChunk( chunk );
#endif
}
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