audio.h

   1 #ifndef AUDIO_H
   2 #define AUDIO_H
   3
   4 #include "common.h"
   5 #include "world.h"
   6
   7 static float audio_occlusion_current = 0.0f,
   8              k_audio_occlusion_rate  = 1.0f;
   9
  10 static int   k_audio_debug_soundscape = 0;
  11
  12 sfx_vol_control audio_vol_all = { .val = 1.0f, .name = "All" };
  13
  14 sfx_set audio_board =
  15 {
  16    .sources = "sound/skate.ogg\0"
  17               "sound/wheel.ogg\0"
  18               "sound/slide.ogg\0"
  19               "sound/reverb.ogg\0"
  20 };
  21
  22 sfx_system audio_player0 =
  23 {
  24    .vol = 0.0f,
  25    .ch = 1,
  26    .vol_src = &audio_vol_all,
  27    .name = "Player0",
  28    .flags = SFX_FLAG_REPEAT | SFX_FLAG_PERSISTENT
  29 };
  30
  31 sfx_system audio_player1 =
  32 {
  33    .vol = 0.0f,
  34    .ch = 1,
  35    .vol_src = &audio_vol_all,
  36    .name = "Player1",
  37    .flags = SFX_FLAG_REPEAT | SFX_FLAG_PERSISTENT
  38 };
  39
  40 sfx_system audio_player2 =
  41 {
  42    .vol = 0.0f,
  43    .ch = 1,
  44    .vol_src = &audio_vol_all,
  45    .name = "Player2",
  46    .flags = SFX_FLAG_REPEAT | SFX_FLAG_PERSISTENT
  47 };
  48
  49 sfx_system audio_player3 =
  50 {
  51    .vol = 0.0f,
  52    .ch = 1,
  53    .vol_src = &audio_vol_all,
  54    .name = "Player3",
  55    .flags = SFX_FLAG_REPEAT | SFX_FLAG_PERSISTENT
  56 };
  57
  58 static void audio_init(void)
  59 {
  60    sfx_set_init( &audio_board, NULL );
  61    sfx_set_play( &audio_board, &audio_player0, 0 );
  62    sfx_set_play( &audio_board, &audio_player1, 1 );
  63    sfx_set_play( &audio_board, &audio_player2, 2 );
  64    sfx_set_play( &audio_board, &audio_player3, 3 );
  65
  66    vg_convar_push( (struct vg_convar){
  67       .name = "aud_debug_soundscape",
  68       .data = &k_audio_debug_soundscape,
  69       .data_type = k_convar_dtype_i32,
  70       .opt_i32 = { .min=0, .max=1, .clamp=0 },
  71       .persistent = 1
  72    });
  73
  74    vg_convar_push( (struct vg_convar){
  75       .name = "aud_occlusion_rate",
  76       .data = &k_audio_occlusion_rate,
  77       .data_type = k_convar_dtype_f32,
  78       .opt_f32 = { .clamp = 0 },
  79       .persistent = 1
  80    });
  81 }
  82
  83 static void audio_free(void)
  84 {
  85    sfx_set_free( &audio_board );
  86 }
  87
  88 static void audio_sample_occlusion( v3f origin )
  89 {
  90    float d = 0.0f,
  91          sample_dist = 880.0f;
  92
  93    int sample_count = 8;
  94
  95    for( int i=0; i<sample_count; i++ )
  96    {
  97       v3f dir;
  98       dir[0] = vg_randf();
  99       dir[1] = vg_randf();
 100       dir[2] = vg_randf();
 101
 102       v3_muls( dir, 2.0f, dir );
 103       v3_sub( dir, (v3f){1.0f,1.0f,1.0f}, dir );
 104
 105       v3_normalize( dir );
 106
 107       ray_hit contact;
 108       contact.dist = 15.0f;
 109
 110       if( ray_world( origin, dir, &contact ) )
 111       {
 112          d += contact.dist;
 113
 114          vg_line( origin, contact.pos, 0xff0000ff );
 115          vg_line_pt3( contact.pos, 0.1f, 0xff0000ff );
 116       }
 117       else
 118       {
 119          v3f p1;
 120          v3_muladds( origin, dir, sample_dist, p1 );
 121          vg_line( origin, p1, 0xffcccccc );
 122
 123          d += sample_dist;
 124       }
 125    }
 126
 127    float occlusion = 1.0f - (d * (1.0f/(sample_dist*(float)sample_count))),
 128          rate = ktimestep * k_audio_occlusion_rate,
 129          target = powf( occlusion, 6.0f );
 130    audio_occlusion_current = vg_lerpf( audio_occlusion_current, target, rate );
 131 }
 132
 133 static void audio_debug_soundscapes(void)
 134 {
 135    if( !k_audio_debug_soundscape ) return;
 136
 137    char buf[64];
 138    snprintf( buf, 31, "occlusion: %.5f", audio_occlusion_current );
 139
 140    ui_global_ctx.cursor[0] = 10;
 141    ui_global_ctx.cursor[1] = 10;
 142    ui_global_ctx.cursor[2] = audio_occlusion_current * 200.0f;
 143    ui_global_ctx.cursor[3] = 20;
 144
 145    gui_fill_rect( ui_global_ctx.cursor, 0x55cccccc );
 146    gui_text( ui_global_ctx.cursor, buf, 1, 0 );
 147 }
 148
 149 #endif /* AUDIO_H */