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 (Mix_OpenAudio( frequency, format, channels, chunksize ) < 0)
  63     return -1;
  64
  65   // allocate 16 channels for mixing
  66   if (Mix_AllocateChannels(8)  != 8)
  67     return -2;
  68
  69   /* reserve some channels and register panning effects */
  70   if (Mix_ReserveChannels(SOUND_RESERVED_CHANNELS) != SOUND_RESERVED_CHANNELS)
  71     return -3;
  72
  73   /* prepare the spanning effects */
  74   Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
  75   Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
  76   return 0;
  77 }
  78
  79
  80 /* --- CLOSE THE AUDIO DEVICE --- */
  81
  82 void close_audio( void )
  83 {
  84   if (audio_device) {
  85     Mix_UnregisterAllEffects( SOUND_LEFT_SPEAKER );
  86     Mix_UnregisterAllEffects( SOUND_RIGHT_SPEAKER );
  87     Mix_CloseAudio();
  88   }
  89 }
  90
  91
  92 /* --- LOAD A SOUND --- */
  93
  94 Mix_Chunk* load_sound(const std::string& file)
  95 {
  96   if(!audio_device)
  97     return 0;
  98
  99   Mix_Chunk* snd = Mix_LoadWAV(file.c_str());
 100
 101   if (snd == 0)
 102     st_abort("Can't load", file);
 103
 104   return(snd);
 105 }
 106
 107 /* --- PLAY A SOUND ON LEFT OR RIGHT OR CENTER SPEAKER --- */
 108
 109 void play_sound(Mix_Chunk * snd, enum Sound_Speaker whichSpeaker)
 110 {
 111   /* this won't call the function if the user has disabled sound
 112    * either via menu or via command-line option
 113    */
 114   if(!audio_device || !use_sound)
 115     return;
 116
 117   Mix_PlayChannel( whichSpeaker, snd, 0);
 118
 119   /* prepare for panning effects for next call */
 120   switch (whichSpeaker) {
 121     case SOUND_LEFT_SPEAKER:
 122       Mix_SetPanning( SOUND_LEFT_SPEAKER, 230, 24 );
 123       break;
 124     case SOUND_RIGHT_SPEAKER:
 125       Mix_SetPanning( SOUND_RIGHT_SPEAKER, 24, 230 );
 126       break;
 127     default:  // keep the compiler happy
 128       break;
 129   }
 130 }
 131
 132 void free_chunk(Mix_Chunk *chunk)
 133 {
 134   Mix_FreeChunk( chunk );
 135 }
 136