world_audio.h

   1 #ifndef WORLD_AUDIO_H
   2 #define WORLD_AUDIO_H
   3
   4 #include "common.h"
   5 #include "audio.h"
   6
   7 sfx_set audio_birds =
   8 {
   9    .sources = "sound/bird0.ogg\0"
  10               "sound/bird1.ogg\0"
  11               "sound/bird2.ogg\0"
  12 };
  13
  14 static float k_audio_random_freq = 1.0f/10.0f,
  15              k_audio_random_hz   = 1.0f;
  16
  17 static double world_audio_last_tick = 0.0;
  18
  19 static struct world_ambient_layer
  20 {
  21    sfx_system sys;
  22    v3f pos;
  23 }
  24 world_ambient_layers[8];
  25
  26 static void world_audio_init(void)
  27 {
  28    sfx_set_init( &audio_birds, NULL );
  29
  30    vg_convar_push( (struct vg_convar){
  31       .name = "aud_random_freq",
  32       .data = &k_audio_random_freq,
  33       .data_type = k_convar_dtype_f32,
  34       .opt_f32 = { .clamp = 0 },
  35       .persistent = 1
  36    });
  37
  38    for( int i=0; i<vg_list_size(world_ambient_layers); i++ )
  39    {
  40       struct world_ambient_layer *layer = &world_ambient_layers[i];
  41       sfx_system *sys = &layer->sys;
  42       sys->vol = 1.0f;
  43       sys->ch  = 1;
  44       sys->vol_src = &audio_vol_all;
  45       sys->name = "ambient";
  46       sys->flags = SFX_FLAG_PERSISTENT;
  47    }
  48 }
  49
  50 static void world_audio_spawn_random( v3f around )
  51 {
  52    for( int i=0; i<vg_list_size(world_ambient_layers); i++ )
  53    {
  54       struct world_ambient_layer *layer = &world_ambient_layers[i];
  55
  56       if( !layer->sys.is_playing )
  57       {
  58          sfx_set_playrnd( &audio_birds, &layer->sys, 0, 3 );
  59
  60          v3f chance;
  61          vg_rand_sphere( chance );
  62          v3_muladds( around, chance, 100.0f, layer->pos );
  63
  64          return;
  65       }
  66    }
  67 }
  68
  69 static void world_audio_update( v3f around, v3f ears )
  70 {
  71    if( world_audio_last_tick + (double)k_audio_random_hz < vg_time )
  72    {
  73       world_audio_last_tick = vg_time;
  74
  75       float chance = vg_randf();
  76       if( chance < k_audio_random_freq )
  77       {
  78          world_audio_spawn_random( around );
  79       }
  80    }
  81
  82    /* Spacialize */
  83    for( int i=0; i<vg_list_size(world_ambient_layers); i++ )
  84    {
  85       struct world_ambient_layer *layer = &world_ambient_layers[i];
  86
  87       if( layer->sys.is_playing )
  88          audio_spacialize( &layer->sys, layer->pos, around, ears, 30.0f );
  89    }
  90 }
  91
  92 static void world_audio_debug(void)
  93 {
  94    for( int i=0; i<vg_list_size(world_ambient_layers); i++ )
  95    {
  96       struct world_ambient_layer *layer = &world_ambient_layers[i];
  97
  98       if( layer->sys.is_playing )
  99       {
 100          vg_line_pt3( layer->pos, 1.0f, 0xffff00ff );
 101       }
 102    }
 103 }
 104
 105 #endif /* WORLD_AUDIO_H */