src/sound.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
   5 //  Copyright (C) 2004 Duong-Khang NGUYEN <neoneurone@users.sf.net>
   6 //
   7 //  This program is free software; you can redistribute it and/or
   8 //  modify it under the terms of the GNU General Public License
   9 //  as published by the Free Software Foundation; either version 2
  10 //  of the License, or (at your option) any later version.
  11 //
  12 //  This program is distributed in the hope that it will be useful,
  13 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 //  GNU General Public License for more details.
  16 //
  17 //  You should have received a copy of the GNU General Public License
  18 //  along with this program; if not, write to the Free Software
  19 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 #include "defines.h"
  22 #include "globals.h"
  23 #include "sound.h"
  24 #include "setup.h"
  25
  26 /*global variable*/
  27 bool use_sound = true;    /* handle sound on/off menu and command-line option */
  28 bool use_music = true;    /* handle music on/off menu and command-line option */
  29 bool audio_device = true; /* != 0: available and initialized */
  30
  31 char * soundfilenames[NUM_SOUNDS] = {
  32                                        "/sounds/jump.wav",
  33                                        "/sounds/bigjump.wav",
  34                                        "/sounds/skid.wav",
  35                                        "/sounds/distro.wav",
  36                                        "/sounds/herring.wav",
  37                                        "/sounds/brick.wav",
  38                                        "/sounds/hurt.wav",
  39                                        "/sounds/squish.wav",
  40                                        "/sounds/fall.wav",
  41                                        "/sounds/ricochet.wav",
  42                                        "/sounds/bump-upgrade.wav",
  43                                        "/sounds/upgrade.wav",
  44                                        "/sounds/excellent.wav",
  45                                        "/sounds/coffee.wav",
  46                                        "/sounds/shoot.wav",
  47                                        "/sounds/lifeup.wav",
  48                                        "/sounds/stomp.wav",
  49                                        "/sounds/kick.wav",
  50                                        "/sounds/explode.wav"
  51                                     };
  52
  53
  54 #include <SDL_mixer.h>
  55
  56 Mix_Chunk * sounds[NUM_SOUNDS];
  57
  58 /* --- OPEN THE AUDIO DEVICE --- */
  59
  60 int open_audio (int frequency, Uint16 format, int channels, int chunksize)
  61 {
  62   /* if success we reserved some channels and register panning effects */
  63   if (Mix_OpenAudio( frequency, format, channels, chunksize ) == 0)
  64     {
  65       if (Mix_ReserveChannels( SOUND_RESERVED_CHANNELS )
  66                             != SOUND_RESERVED_CHANNELS )
  67         {
  68           DEBUG_MSG( "Warning: open_audio could'nt reserve channels" );
  69         }
  70
  71       /* prepare the spanning effects, no error checking */
  72       Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
  73       Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
  74       return 0;
  75     }
  76   else
  77     {
  78       return -1;
  79     }
  80 }
  81
  82
  83 /* --- CLOSE THE AUDIO DEVICE --- */
  84
  85 void close_audio( void )
  86 {
  87   if (audio_device) {
  88     Mix_UnregisterAllEffects( SOUND_LEFT_SPEAKER );
  89     Mix_UnregisterAllEffects( SOUND_RIGHT_SPEAKER );
  90     Mix_CloseAudio();
  91   }
  92 }
  93
  94
  95 /* --- LOAD A SOUND --- */
  96
  97 Mix_Chunk * load_sound(const std::string& file)
  98 {
  99   Mix_Chunk * snd;
 100
 101   snd = Mix_LoadWAV(file.c_str());
 102
 103   if ((snd == NULL) && audio_device)
 104     st_abort("Can't load", file);
 105
 106   return(snd);
 107 }
 108
 109
 110 /* --- LOAD A SONG --- */
 111
 112 Mix_Music * load_song(const std::string& file)
 113 {
 114   if(!audio_device)
 115     return (Mix_Music*) ~0;
 116
 117   Mix_Music* song = Mix_LoadMUS(file.c_str());
 118   return song;
 119 }
 120
 121
 122 /* --- PLAY A SOUND ON LEFT OR RIGHT OR CENTER SPEAKER --- */
 123
 124 void play_sound(Mix_Chunk * snd, enum Sound_Speaker whichSpeaker)
 125 {
 126   /* this won't call the function if the user has disabled sound
 127    * either via menu or via command-line option
 128    */
 129   if (use_sound && audio_device)
 130     {
 131       Mix_PlayChannel( whichSpeaker, snd, 0);
 132
 133       /* prepare for panning effects for next call */
 134       /* warning: currently, I do not check for errors here */
 135       switch (whichSpeaker) {
 136         case SOUND_LEFT_SPEAKER:
 137           Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
 138           break;
 139         case SOUND_RIGHT_SPEAKER:
 140           Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
 141           break;
 142         default:  // keep the compiler happy
 143           break;
 144       }
 145     }
 146 }
 147
 148
 149 void free_chunk(Mix_Chunk *chunk)
 150 {
 151   if (chunk != NULL)
 152     {
 153       Mix_FreeChunk( chunk );
 154       chunk = NULL;
 155     }
 156 }
 157