audio.h

   1 #include "common.h"
   2
   3 #ifndef AUDIO_H
   4 #define AUDIO_H
   5
   6 #include "world.h"
   7
   8 static float audio_occlusion_current = 0.0f,
   9              k_audio_occlusion_rate  = 1.0f;
  10
  11 static int   k_audio_debug_soundscape = 0;
  12
  13
  14 audio_clip audio_board[] =
  15 {
  16    {.path="sound/skate.ogg", .source_mode=k_audio_source_mono_compressed },
  17    {.path="sound/wheel.ogg", .source_mode=k_audio_source_mono_compressed },
  18    {.path="sound/slide.ogg", .source_mode=k_audio_source_mono_compressed },
  19    {.path="sound/reverb.ogg",.source_mode=k_audio_source_mono_compressed }
  20 };
  21
  22 audio_player audio_player0 =
  23 {
  24    .name = "Player0",
  25 };
  26
  27 audio_player audio_player1 =
  28 {
  29    .name = "Player1",
  30 };
  31
  32 audio_player audio_player2 =
  33 {
  34    .name = "Player2",
  35 };
  36
  37 audio_player audio_player3 =
  38 {
  39    .name = "Player3",
  40 };
  41
  42 static void audio_init(void)
  43 {
  44    audio_clip_loadn( audio_board, vg_list_size(audio_board) );
  45
  46    audio_lock();
  47    u32 flags = AUDIO_FLAG_LOOP|AUDIO_FLAG_SPACIAL_3D;
  48
  49    audio_player_set_flags( &audio_player0, flags );
  50    audio_player_set_flags( &audio_player1, flags );
  51    audio_player_set_flags( &audio_player2, flags );
  52    audio_player_set_flags( &audio_player3, AUDIO_FLAG_LOOP );
  53
  54    audio_player_playclip( &audio_player0, &audio_board[0] );
  55    audio_player_playclip( &audio_player1, &audio_board[1] );
  56    audio_player_playclip( &audio_player2, &audio_board[2] );
  57    audio_player_playclip( &audio_player3, &audio_board[3] );
  58
  59    audio_unlock();
  60
  61    vg_convar_push( (struct vg_convar){
  62       .name = "aud_debug_soundscape",
  63       .data = &k_audio_debug_soundscape,
  64       .data_type = k_convar_dtype_i32,
  65       .opt_i32 = { .min=0, .max=1, .clamp=0 },
  66       .persistent = 1
  67    });
  68
  69    vg_convar_push( (struct vg_convar){
  70       .name = "aud_occlusion_rate",
  71       .data = &k_audio_occlusion_rate,
  72       .data_type = k_convar_dtype_f32,
  73       .opt_f32 = { .clamp = 0 },
  74       .persistent = 1
  75    });
  76 }
  77
  78 static void audio_free(void)
  79 {
  80 }
  81
  82 static void audio_sample_occlusion( v3f origin )
  83 {
  84    float d = 0.0f,
  85          sample_dist = 880.0f;
  86
  87    int sample_count = 8;
  88
  89    for( int i=0; i<sample_count; i++ )
  90    {
  91       v3f dir;
  92       vg_rand_dir( dir );
  93
  94       ray_hit contact;
  95       contact.dist = 15.0f;
  96
  97       if( ray_world( origin, dir, &contact ) )
  98       {
  99          d += contact.dist;
 100
 101          vg_line( origin, contact.pos, 0xff0000ff );
 102          vg_line_pt3( contact.pos, 0.1f, 0xff0000ff );
 103       }
 104       else
 105       {
 106          v3f p1;
 107          v3_muladds( origin, dir, sample_dist, p1 );
 108          vg_line( origin, p1, 0xffcccccc );
 109
 110          d += sample_dist;
 111       }
 112    }
 113
 114    float occlusion = 1.0f - (d * (1.0f/(sample_dist*(float)sample_count))),
 115          rate = ktimestep * k_audio_occlusion_rate,
 116          target = powf( occlusion, 6.0f );
 117    audio_occlusion_current = vg_lerpf( audio_occlusion_current, target, rate );
 118 }
 119
 120 static void audio_debug_soundscapes(void)
 121 {
 122    if( !k_audio_debug_soundscape ) return;
 123
 124    char buf[64];
 125    snprintf( buf, 31, "occlusion: %.5f", audio_occlusion_current );
 126
 127    ui_global_ctx.cursor[0] = 450;
 128    ui_global_ctx.cursor[1] = 10;
 129    ui_global_ctx.cursor[2] = audio_occlusion_current * 200.0f;
 130    ui_global_ctx.cursor[3] = 20;
 131
 132    gui_fill_rect( ui_global_ctx.cursor, 0x55cccccc );
 133    gui_text( ui_global_ctx.cursor, buf, 1, 0 );
 134 }
 135
 136 #endif /* AUDIO_H */