sound.c

   1 #include <SDL.h>
   2 #include <SDL_mixer.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <unistd.h>
   6
   7 #include "args.h"
   8 #include "common.h"
   9 #include "config.h"
  10 #include "sound.h"
  11
  12
  13 static Mix_Music *music[NUM_TUNES];
  14 static int music_volume[NUM_TUNES] = {255};
  15 static Mix_Chunk *wav[NUM_SOUNDS];
  16
  17 int audio_rate;
  18 Uint16 audio_format;
  19 int audio_channels;
  20
  21 char *add_data_path(char *);
  22 char *wav_file[] = {
  23         "bang.wav"
  24 };
  25
  26 char *tune_file[] = {
  27         "mph.xm"
  28 };
  29
  30 // Return 1 if the sound is ready to roll, and 0 if not.
  31 int
  32 init_sound() {
  33         int i;
  34         char *s;
  35
  36         // Initialise output with SDL_mixer
  37         if (Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, AUDIO_S16, MIX_DEFAULT_CHANNELS, 4096) < 0) {
  38         fprintf(stderr, "Couldn't open SDL_mixer audio: %s\n", SDL_GetError());
  39         return 0;
  40         }
  41
  42         // Preload all the tunes into memory
  43         for (i=0; i<NUM_TUNES; i++) {
  44                 s = add_data_path(tune_file[i]);
  45                 if(s) {
  46                         music[i] = Mix_LoadMUS(s);
  47                         if(!music[i]) printf("Failed to load %s.\n", s);
  48                         free(s);
  49                 }
  50         }
  51
  52         // Preload all the wav files into memory
  53         for (i=0; i<NUM_SOUNDS; i++) {
  54                 s = add_data_path(wav_file[i]);
  55                 if(s) {
  56                         wav[i] = Mix_LoadWAV(s);
  57                         free(s);
  58                 }
  59         }
  60
  61         return 1;
  62 }
  63
  64 void
  65 play_sound(int i)  {
  66         if(!opt_sound) return;
  67         Mix_PlayChannel(-1, wav[i], 0);
  68 }
  69
  70 int playing = NUM_TUNES + 1;
  71
  72
  73 void
  74 play_tune(int i) {
  75         if(!opt_sound) {
  76                 return;
  77         }
  78         if (playing == i) {
  79                 return;
  80         }
  81         if (playing < NUM_TUNES) {
  82                 Mix_FadeOutMusic(2500);
  83         }
  84         // There are songs yet to be written...
  85         if(i < NUM_TUNES) {
  86                 Mix_FadeInMusic(music[i], -1, 2000);
  87                 Mix_VolumeMusic(music_volume[i]);
  88         }
  89
  90         playing = i;
  91 }
  92
  93
  94 int tune_paused=0;
  95
  96 void
  97 pause_tune() {
  98         if(!opt_sound) {
  99                 return;
 100         }
 101         if(playing < NUM_TUNES && !tune_paused) {
 102                 Mix_PauseMusic();
 103                 tune_paused = 1;
 104         }
 105 }
 106
 107 void
 108 resume_tune() {
 109         if(!opt_sound) {
 110                 return;
 111         }
 112         if(playing < NUM_TUNES && tune_paused) {
 113                 Mix_ResumeMusic();
 114                 tune_paused = 0;
 115         }
 116 }
 117
 118 /*
 119  *
 120  * The init_sound() routine is called first.
 121  * The play_sound() routine is called with the index number of the sound we wish to play.
 122  * The play_tune() routine is called with the index number of the tune we wish to play.
 123  *
 124  */