src/audio.cpp

   1 /*
   2 Copyright (C) 2003 Parallel Realities
   3 Copyright (C) 2011, 2012 Guus Sliepen
   4 Copyright (C) 2015 Julian Marchant
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 3
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "Starfighter.h"
  21
  22 static Mix_Chunk *sound[SFX_MAX];
  23 static Mix_Music *music = NULL;
  24
  25 void audio_loadSounds()
  26 {
  27         sound[SFX_EXPLOSION] = Mix_LoadWAV("sound/explode.ogg");
  28         sound[SFX_HIT] = Mix_LoadWAV("sound/explode2.ogg");
  29         sound[SFX_DEATH] = Mix_LoadWAV("sound/maledeath.ogg");
  30         sound[SFX_MISSILE] = Mix_LoadWAV("sound/missile.ogg");
  31         sound[SFX_PLASMA] = Mix_LoadWAV("sound/plasma.ogg");
  32         sound[SFX_CLOCK] = Mix_LoadWAV("sound/clock.ogg");
  33         sound[SFX_FLY] = Mix_LoadWAV("sound/flyby.ogg");
  34         sound[SFX_ENERGYRAY] = Mix_LoadWAV("sound/beamLaser.ogg");
  35         sound[SFX_PICKUP] = Mix_LoadWAV("sound/item.ogg");
  36         sound[SFX_SHIELDUP] = Mix_LoadWAV("sound/shield.ogg");
  37         sound[SFX_CLOAK] = Mix_LoadWAV("sound/cloak.ogg");
  38         sound[SFX_DEBRIS] = Mix_LoadWAV("sound/explode3.ogg");
  39         sound[SFX_DEBRIS2] = Mix_LoadWAV("sound/explode4.ogg");
  40         sound[SFX_LASER] = Mix_LoadWAV("sound/laser.ogg");
  41         sound[SFX_PLASMA2] = Mix_LoadWAV("sound/plasma2.ogg");
  42         sound[SFX_PLASMA3] = Mix_LoadWAV("sound/plasma3.ogg");
  43 }
  44
  45 void audio_playSound(int sid, float x)
  46 {
  47         if ((!engine.useSound) || (!engine.useAudio))
  48                 return;
  49
  50         int channel = -1;
  51         static int freechannel = 4;
  52
  53         switch(sid)
  54         {
  55                 case SFX_DEATH:
  56                 case SFX_CLOCK:
  57                 case SFX_FLY:
  58                 case SFX_SHIELDUP:
  59                 case SFX_PICKUP:
  60                 case SFX_CLOAK:
  61                 case SFX_PLASMA2:
  62                 case SFX_PLASMA3:
  63                         channel = -1;
  64                         break;
  65                 case SFX_PLASMA:
  66                 case SFX_LASER:
  67                         channel = 0;
  68                         break;
  69                 case SFX_ENERGYRAY:
  70                 case SFX_MISSILE:
  71                         channel = 1;
  72                         break;
  73                 case SFX_HIT:
  74                         channel = 2;
  75                         break;
  76                 case SFX_EXPLOSION:
  77                 case SFX_DEBRIS:
  78                 case SFX_DEBRIS2:
  79                         channel = 3;
  80                         break;
  81         }
  82
  83         if(channel == -1) {
  84                 channel = freechannel++;
  85                 if(freechannel >= 8)
  86                         freechannel = 4;
  87         }
  88
  89         int angle = atanf((x - (screen->w / 2)) / (screen->w / 2)) * 180 / M_PI;
  90         int attenuation = fabsf(x - (screen->w / 2)) / 40;
  91
  92         if (angle < 0)
  93                 angle += 360;
  94
  95         if (attenuation > 255)
  96                 attenuation = 255;
  97
  98         Mix_SetPosition(channel, angle, attenuation);
  99         Mix_PlayChannel(channel, sound[sid], 0);
 100 }
 101
 102 void audio_haltMusic()
 103 {
 104         if (Mix_PlayingMusic())
 105         {
 106                 Mix_ResumeMusic();
 107                 Mix_HaltMusic();
 108         }
 109
 110         if (music != NULL)
 111         {
 112                 Mix_FreeMusic(music);
 113                 music = NULL;
 114         }
 115 }
 116
 117 void audio_pauseMusic()
 118 {
 119         if (Mix_PlayingMusic() && !Mix_PausedMusic())
 120                 Mix_PauseMusic();
 121 }
 122
 123 void audio_resumeMusic()
 124 {
 125         Mix_ResumeMusic();
 126 }
 127
 128 void audio_setMusicVolume(int volume)
 129 {
 130         if (engine.useMusic && engine.useAudio)
 131                 Mix_VolumeMusic(volume);
 132 }
 133
 134 void audio_playMusic(const char *filename, int loops)
 135 {
 136         if (engine.useMusic && engine.useAudio)
 137         {
 138                 audio_haltMusic();
 139                 music = Mix_LoadMUS(filename);
 140                 audio_setMusicVolume(100);
 141                 Mix_PlayMusic(music, loops);
 142         }
 143 }
 144
 145 void audio_playRandomTrack()
 146 {
 147         if ((!engine.useMusic) || (!engine.useAudio))
 148                 return;
 149
 150         int tracks = 4;
 151         char track[][64] = {
 152                 "music/railjet_short.ogg", "music/space_dimensions.ogg",
 153                 "music/frozen_jam.ogg", "music/sound_and_silence.ogg"
 154         };
 155
 156         switch(game.area)
 157         {
 158                 case MISN_START:
 159                         audio_playMusic("music/railjet_short.ogg", -1);
 160                         break;
 161                 case MISN_MOEBO:
 162                 case MISN_ELAMALE:
 163                 case MISN_ELLESH:
 164                 case MISN_EARTH:
 165                         audio_playMusic("music/orbital_colossus.ogg", -1);
 166                         break;
 167                 case MISN_VENUS:
 168                         audio_playMusic("music/RE.ogg", -1);
 169                         break;
 170                 default:
 171                         audio_playMusic(track[rand() % tracks], -1);
 172         }
 173 }
 174
 175 void audio_free()
 176 {
 177         for (int i = 0 ; i < SFX_MAX ; i++)
 178         {
 179                 if (sound[i] != NULL)
 180                 {
 181                         Mix_FreeChunk(sound[i]);
 182                         sound[i] = NULL;
 183                 }
 184         }
 185
 186         if (music != NULL)
 187         {
 188                 Mix_FreeMusic(music);
 189                 music = NULL;
 190         }
 191 }