mdw@git.distorted.org.uk Git - newkind/blob - sound.c

   1 /*
   2  * Elite - The New Kind.
   3  *
   4  * Reverse engineered from the BBC disk version of Elite.
   5  * Additional material by C.J.Pinder.
   6  *
   7  * The original Elite code is (C) I.Bell & D.Braben 1984.
   8  * This version re-engineered in C by C.J.Pinder 1999-2001.
   9  *
  10  * email: <christian@newkind.co.uk>
  11  *
  12  *
  13  */
  14
  15 /*
  16  * sound.c
  17  */
  18
  19 #include <stdlib.h>
  20 #include <allegro.h>
  21 #include "sound.h"
  22 #include "alg_data.h"
  23
  24 #define NUM_SAMPLES 14
  25
  26 extern DATAFILE *datafile;
  27
  28 static int sound_on;
  29
  30 struct sound_sample
  31 {
  32         SAMPLE *sample;
  33         char filename[256];
  34         int runtime;
  35         int timeleft;
  36 };
  37
  38 struct sound_sample sample_list[NUM_SAMPLES] =
  39 {
  40         {NULL, "launch.wav",    32, 0},
  41         {NULL, "crash.wav",      7, 0},
  42         {NULL, "dock.wav",      36, 0},
  43         {NULL, "gameover.wav",  24, 0},
  44         {NULL, "pulse.wav",      4, 0},
  45         {NULL, "hitem.wav",              4, 0},
  46         {NULL, "explode.wav",   23, 0},
  47         {NULL, "ecm.wav",               23, 0},
  48         {NULL, "missile.wav",   25, 0},
  49         {NULL, "hyper.wav",         37, 0},
  50         {NULL, "incom1.wav",     4, 0},
  51         {NULL, "incom2.wav",     5, 0},
  52         {NULL, "beep.wav",               2, 0},
  53         {NULL, "boop.wav",               7, 0},
  54 };
  55
  56
  57 void snd_sound_startup (void)
  58 {
  59         int i;
  60
  61         /* Install a sound driver.. */
  62         sound_on = 1;
  63
  64         if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, ".") != 0)
  65         {
  66                 sound_on = 0;
  67                 return;
  68         }
  69
  70         /* Load the sound samples... */
  71
  72         for (i = 0; i < NUM_SAMPLES; i++)
  73         {
  74                 sample_list[i].sample = load_sample(sample_list[i].filename);
  75         }
  76 }
  77
  78
  79 void snd_sound_shutdown (void)
  80 {
  81         int i;
  82
  83         if (!sound_on)
  84                 return;
  85
  86         for (i = 0; i < NUM_SAMPLES; i++)
  87         {
  88                 if (sample_list[i].sample != NULL)
  89                 {
  90                         destroy_sample (sample_list[i].sample);
  91                         sample_list[i].sample = NULL;
  92                 }
  93         }
  94 }
  95
  96
  97 void snd_play_sample (int sample_no)
  98 {
  99         if (!sound_on)
 100                 return;
 101
 102         if (sample_list[sample_no].timeleft != 0)
 103                 return;
 104
 105         sample_list[sample_no].timeleft = sample_list[sample_no].runtime;
 106
 107         play_sample (sample_list[sample_no].sample, 255, 128, 1000, FALSE);
 108 }
 109
 110
 111 void snd_update_sound (void)
 112 {
 113         int i;
 114
 115         for (i = 0; i < NUM_SAMPLES; i++)
 116         {
 117                 if (sample_list[i].timeleft > 0)
 118                         sample_list[i].timeleft--;
 119         }
 120 }
 121
 122
 123 void snd_play_midi (int midi_no, int repeat)
 124 {
 125         if (!sound_on)
 126                 return;
 127
 128         switch (midi_no)
 129         {
 130                 case SND_ELITE_THEME:
 131                         play_midi (datafile[THEME].dat, repeat);
 132                         break;
 133
 134                 case SND_BLUE_DANUBE:
 135                         play_midi (datafile[DANUBE].dat, repeat);
 136                         break;
 137         }
 138 }
 139
 140
 141 void snd_stop_midi (void)
 142 {
 143         if (sound_on);
 144                 play_midi (NULL, TRUE);
 145 }