audio.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #include "common.h"
   6
   7 #ifndef AUDIO_H
   8 #define AUDIO_H
   9
  10 #include "world.h"
  11
  12 audio_clip audio_board[] =
  13 {
  14    { .path="sound/skate_hpf.ogg" },
  15    { .path="sound/wheel.ogg" },
  16    { .path="sound/slide.ogg" },
  17    { .path="sound/grind_enter.ogg" },
  18    { .path="sound/grind_exit.ogg" },
  19    { .path="sound/grind_loop.ogg" },
  20    { .path="sound/woodslide.ogg" },
  21    { .path="sound/metalscrape.ogg" },
  22    { .path="sound/slidetap.ogg" }
  23 };
  24
  25 audio_clip audio_taps[] =
  26 {
  27    { .path="sound/tap0.ogg" },
  28    { .path="sound/tap1.ogg" },
  29    { .path="sound/tap2.ogg" },
  30    { .path="sound/tap3.ogg" }
  31 };
  32
  33 audio_clip audio_flips[] =
  34 {
  35    { .path="sound/lf0.ogg" },
  36    { .path="sound/lf1.ogg" },
  37    { .path="sound/lf2.ogg" },
  38    { .path="sound/lf3.ogg" },
  39 };
  40
  41 audio_clip audio_hits[] =
  42 {
  43    { .path="sound/hit0.ogg" },
  44    { .path="sound/hit1.ogg" },
  45    { .path="sound/hit2.ogg" },
  46    { .path="sound/hit3.ogg" },
  47    { .path="sound/hit4.ogg" }
  48 };
  49
  50 audio_clip audio_splash =
  51 { .path = "sound/splash.ogg" };
  52
  53 audio_clip audio_jumps[] = {
  54    { .path = "sound/jump0.ogg" },
  55    { .path = "sound/jump1.ogg" },
  56 };
  57
  58 audio_clip audio_footsteps[] = {
  59  {.path = "sound/step_concrete0.ogg" },
  60  {.path = "sound/step_concrete1.ogg" },
  61  {.path = "sound/step_concrete2.ogg" },
  62  {.path = "sound/step_concrete3.ogg" }
  63 };
  64
  65 audio_clip audio_footsteps_grass[] = {
  66  {.path = "sound/step_bush0.ogg" },
  67  {.path = "sound/step_bush1.ogg" },
  68  {.path = "sound/step_bush2.ogg" },
  69  {.path = "sound/step_bush3.ogg" },
  70  {.path = "sound/step_bush4.ogg" },
  71  {.path = "sound/step_bush5.ogg" }
  72 };
  73
  74 audio_clip audio_footsteps_wood[] = {
  75  {.path = "sound/step_wood0.ogg" },
  76  {.path = "sound/step_wood1.ogg" },
  77  {.path = "sound/step_wood2.ogg" },
  78  {.path = "sound/step_wood3.ogg" },
  79  {.path = "sound/step_wood4.ogg" },
  80  {.path = "sound/step_wood5.ogg" }
  81 };
  82
  83 audio_clip audio_lands[] = {
  84    { .path = "sound/land0.ogg" },
  85    { .path = "sound/land1.ogg" },
  86    { .path = "sound/land2.ogg" },
  87    { .path = "sound/landsk0.ogg" },
  88    { .path = "sound/landsk1.ogg" },
  89    { .path = "sound/onto.ogg" },
  90    { .path = "sound/outo.ogg" },
  91 };
  92
  93 audio_clip audio_water[] = {
  94    { .path = "sound/wave0.ogg" },
  95    { .path = "sound/wave1.ogg" },
  96    { .path = "sound/wave2.ogg" },
  97    { .path = "sound/wave3.ogg" },
  98    { .path = "sound/wave4.ogg" },
  99    { .path = "sound/wave5.ogg" }
 100 };
 101
 102 audio_clip audio_grass[] = {
 103    { .path = "sound/grass0.ogg" },
 104    { .path = "sound/grass1.ogg" },
 105    { .path = "sound/grass2.ogg" },
 106    { .path = "sound/grass3.ogg" },
 107 };
 108
 109 audio_clip audio_ambience[] =
 110 {
 111    { .path="sound/town_generic.ogg" }
 112 };
 113
 114 audio_clip audio_gate_pass = {
 115    .path = "sound/gate_pass.ogg"
 116 };
 117
 118 audio_clip audio_gate_lap = {
 119    .path = "sound/gate_lap.ogg"
 120 };
 121
 122 audio_clip audio_gate_ambient = {
 123 .path = "sound/gate_ambient.ogg"
 124 };
 125
 126 audio_clip audio_rewind[] = {
 127 { .path = "sound/rewind_start.ogg" },
 128 { .path = "sound/rewind_end_1.5.ogg" },
 129 { .path = "sound/rewind_end_2.5.ogg" },
 130 { .path = "sound/rewind_end_6.5.ogg" },
 131 { .path = "sound/rewind_clack.ogg" },
 132 };
 133
 134 audio_clip audio_ui[] = {
 135    { .path = "sound/ui_click.ogg" },
 136    { .path = "sound/ui_ding.ogg" },
 137    { .path = "sound/teleport.ogg" }
 138 };
 139
 140 audio_clip audio_challenge[] = {
 141    { .path = "sound/objective0.ogg" },
 142    { .path = "sound/objective1.ogg" },
 143    { .path = "sound/objective_win.ogg" },
 144    { .path = "sound/ui_good.ogg" },
 145    { .path = "sound/ui_inf.ogg" },
 146    { .path = "sound/ui_ok.ogg" },
 147    { .path = "sound/objective_fail.ogg" }
 148 };
 149
 150 struct air_synth_data {
 151    f32 speed;
 152
 153    /* internal */
 154    f32 t;
 155    struct dsp_biquad lpf;
 156    SDL_SpinLock sl;
 157 }
 158 static air_data;
 159
 160 static void audio_air_synth_get_samples( void *_data, f32 *buf, u32 count ){
 161    struct air_synth_data *data = _data;
 162
 163    SDL_AtomicLock( &data->sl );
 164    f32 spd = data->speed;
 165    SDL_AtomicUnlock( &data->sl );
 166
 167    f32 s0  = sinf(data->t*2.0f),
 168        s1  = sinf(data->t*0.43f),
 169        s2  = sinf(data->t*1.333f),
 170        sm  = vg_clampf( data->speed / 45.0f, 0, 1 ),
 171        ft  = (s0*s1*s2)*0.5f+0.5f,
 172        f   = vg_lerpf( 200.0f, 1200.0f, sm*0.7f + ft*0.3f ),
 173        vol = 0.25f * sm;
 174
 175    dsp_init_biquad_butterworth_lpf( &data->lpf, f );
 176
 177    for( u32 i=0; i<count; i ++ ){
 178       f32 v = (vg_randf64(&vg_dsp.rand) * 2.0f - 1.0f) * vol;
 179       v = dsp_biquad_process( &data->lpf, v );
 180
 181       buf[i*2+0] = v;
 182       buf[i*2+1] = v;
 183    }
 184
 185    data->t += (f32)(count)/44100.0f;
 186 };
 187
 188 static audio_clip air_synth = {
 189    .flags = k_audio_format_gen,
 190    .size = 0,
 191    .func = audio_air_synth_get_samples,
 192    .data = &air_data
 193 };
 194
 195 static void audio_init(void)
 196 {
 197    audio_clip_loadn( audio_board, vg_list_size(audio_board), NULL );
 198    audio_clip_loadn( audio_taps, vg_list_size(audio_taps), NULL );
 199    audio_clip_loadn( audio_flips, vg_list_size(audio_flips), NULL );
 200    audio_clip_loadn( audio_hits, vg_list_size(audio_hits), NULL );
 201    audio_clip_loadn( audio_ambience, vg_list_size(audio_ambience), NULL );
 202    audio_clip_loadn( &audio_splash, 1, NULL );
 203    audio_clip_loadn( &audio_gate_pass, 1, NULL );
 204    audio_clip_loadn( &audio_gate_lap, 1, NULL );
 205    audio_clip_loadn( &audio_gate_ambient, 1, NULL );
 206
 207    audio_clip_loadn( audio_jumps, vg_list_size(audio_jumps), NULL );
 208    audio_clip_loadn( audio_lands, vg_list_size(audio_lands), NULL );
 209    audio_clip_loadn( audio_water, vg_list_size(audio_water), NULL );
 210    audio_clip_loadn( audio_grass, vg_list_size(audio_grass), NULL );
 211    audio_clip_loadn( audio_footsteps, vg_list_size(audio_footsteps), NULL );
 212    audio_clip_loadn( audio_footsteps_grass,
 213                      vg_list_size(audio_footsteps_grass), NULL );
 214    audio_clip_loadn( audio_footsteps_wood,
 215                      vg_list_size(audio_footsteps_wood), NULL );
 216    audio_clip_loadn( audio_rewind, vg_list_size(audio_rewind), NULL );
 217    audio_clip_loadn( audio_ui, vg_list_size(audio_ui), NULL );
 218    audio_clip_loadn( audio_challenge, vg_list_size(audio_challenge), NULL );
 219
 220    audio_lock();
 221    audio_set_lfo_wave( 0, k_lfo_polynomial_bipolar, 80.0f );
 222    audio_set_lfo_frequency( 0, 20.0f );
 223
 224    skaterift.aud_air = audio_get_first_idle_channel();
 225    if( skaterift.aud_air )
 226       audio_channel_init( skaterift.aud_air, &air_synth, 0 );
 227
 228    audio_unlock();
 229 }
 230
 231 static void audio_free(void)
 232 {
 233    /* TODO! */
 234    vg_warn( "UNIMPLEMENTED: audio_free()\n" );
 235 }
 236
 237 enum audio_sprite_type
 238 {
 239    k_audio_sprite_type_none,
 240    k_audio_sprite_type_grass,
 241    k_audio_sprite_type_water
 242 };
 243
 244 static void audio_ambient_sprite_play( v3f co, audio_clip *clip )
 245 {
 246    audio_lock();
 247    u16 group_id = 0xfff0;
 248    audio_channel *ch = audio_get_group_idle_channel( group_id, 4 );
 249
 250    if( ch ){
 251       audio_channel_init( ch, clip, AUDIO_FLAG_SPACIAL_3D );
 252       audio_channel_group( ch, group_id );
 253       audio_channel_set_spacial( ch, co, 80.0f );
 254       audio_channel_edit_volume( ch, 1.0f, 1 );
 255       ch = audio_relinquish_channel( ch );
 256    }
 257    audio_unlock();
 258 }
 259
 260 static
 261 enum audio_sprite_type world_audio_sample_sprite_random(v3f origin, v3f output);
 262 static void audio_ambient_sprites_update( world_instance *world, v3f co )
 263 {
 264    static float accum = 0.0f;
 265    accum += vg.time_delta;
 266
 267    if( accum > 0.1f )
 268       accum -= 0.1f;
 269    else return;
 270
 271    v3f sprite_pos;
 272    enum audio_sprite_type sprite_type =
 273       world_audio_sample_sprite_random( co, sprite_pos );
 274
 275    if( sprite_type != k_audio_sprite_type_none ){
 276       if( sprite_type == k_audio_sprite_type_grass ){
 277          audio_ambient_sprite_play( sprite_pos,
 278                                     &audio_grass[vg_randu32(&vg.rand)%4] );
 279       }
 280       else if( sprite_type == k_audio_sprite_type_water ){
 281          if( world->water.enabled ){
 282             audio_ambient_sprite_play( sprite_pos,
 283                                        &audio_water[vg_randu32(&vg.rand)%6] );
 284          }
 285       }
 286    }
 287 }
 288
 289 #endif /* AUDIO_H */