fp: Use audio handles

feely_pona.cpp

@@ -454,6 +454,7 @@ void TELY_OS_DLLInit(TELY_OS *os)
     game->audio[FP_GameAudio_Ambience1]     = os->funcs.load_audio(assets, DQN_STR8("Ambience one"),                DQN_STR8("Data/Audio/ambience_1.ogg"));
     game->audio[FP_GameAudio_Ambience2]     = os->funcs.load_audio(assets, DQN_STR8("Ambience two"),                DQN_STR8("Data/Audio/ambience_2.ogg"));
     game->audio[FP_GameAudio_Music1]        = os->funcs.load_audio(assets, DQN_STR8("Music one"),                   DQN_STR8("Data/Audio/music_1.ogg"));
+    game->audio[FP_GameAudio_Music2]        = os->funcs.load_audio(assets, DQN_STR8("Music two"),                   DQN_STR8("Data/Audio/music_2.ogg"));
 
     // NOTE: Load sprite sheets ====================================================================
     os->user_data = game;
@@ -2014,12 +2015,18 @@ static void FP_Update(TELY_OS *os, FP_Game *game, TELY_OSInput *input, TELY_Audi
             // haven't given the player cooldown yet, so we assign a timestamp for that
             if (game->play.wave_cooldown_timestamp_ms == 0) {
                 game->play.wave_cooldown_timestamp_ms = game->play.clock_ms + FP_COOLDOWN_WAVE_TIME_MS;
+                TELY_Audio_Fade(audio, game->bg_music1, TELY_AudioEffectFade_Out, 2000 /*fade_duration_ms*/);
+                game->bg_music2 = TELY_Audio_Play(audio, game->audio[FP_GameAudio_Music2], 1.f);
+                TELY_Audio_Fade(audio, game->bg_music2, TELY_AudioEffectFade_In, 2000 /*fade_duration_ms*/);
             } else {
                 // NOTE: Check if cooldown has elapsed, the next wave can start if so
                 if (game->play.clock_ms > game->play.wave_cooldown_timestamp_ms) {
                     game->play.enemies_per_wave           = DQN_MAX(5 * DQN_CAST(uint32_t)game->play.mob_spawners.size, DQN_CAST(uint32_t)(game->play.enemies_per_wave * 1.5));
                     game->play.enemies_spawned_this_wave  = 0; // Important! Reset the spawn count
                     game->play.wave_cooldown_timestamp_ms = 0; // Important! We reset the timestamp for the next wave
+                    TELY_Audio_Fade(audio, game->bg_music2, TELY_AudioEffectFade_Out, 2000 /*fade_duration_ms*/);
+                    game->bg_music1 = TELY_Audio_Play(audio, game->audio[FP_GameAudio_Music1], 1.f);
+                    TELY_Audio_Fade(audio, game->bg_music1, TELY_AudioEffectFade_In, 2000 /*fade_duration_ms*/);
 
                     if (monkey_spawn && game->play.current_wave != 0) {
                         // NOTE: We spawn a monkey at these wave intervals;
@@ -2036,6 +2043,7 @@ static void FP_Update(TELY_OS *os, FP_Game *game, TELY_OSInput *input, TELY_Audi
                     }
 
                     game->play.current_wave++;
+                    //TELY_Audio_Stop(audio, game->audio[FP_GameAudio_Music2]);
 
                 }
             }
@@ -4453,16 +4461,6 @@ void TELY_OS_DLLFrameUpdate(TELY_OS *os)
 
     // =============================================================================================
 
-    TELY_Audio *audio = &os->audio;
-
-    #if 1
-    if (audio->playback_size == 0) {
-        TELY_Audio_Play(audio, game->audio[FP_GameAudio_Ambience2], 1.f /*volume*/);
-    }
-    #endif
-
-    // =============================================================================================
-
     if (game->play.state == FP_GameState_Play || game->play.state == FP_GameState_Tutorial) {
         if (TELY_OSInput_KeyWasDown(input->mouse_left) && TELY_OSInput_KeyIsDown(input->mouse_left)) {
             if (game->play.prev_active_entity.id)
@@ -4492,6 +4490,7 @@ void TELY_OS_DLLFrameUpdate(TELY_OS *os)
         }
     }
 
+    TELY_Audio *audio = &os->audio;
     for (game->play.delta_s_accumulator += DQN_CAST(Dqn_f32)input->delta_s;
          game->play.delta_s_accumulator > FP_GAME_PHYSICS_STEP;
          game->play.delta_s_accumulator -= FP_GAME_PHYSICS_STEP) {

feely_pona_game.h

@@ -339,6 +339,7 @@ enum FP_GameAudio
     FP_GameAudio_Ambience1,
     FP_GameAudio_Ambience2,
     FP_GameAudio_Music1,
+    FP_GameAudio_Music2,
     FP_GameAudio_Count,
 };
 
@@ -480,15 +481,17 @@ struct FP_Game
     TELY_AssetFontHandle   jetbrains_mono_font;
     TELY_AssetFontHandle   talkco_font;
 
-    TELY_AssetAudioHandle  audio[FP_GameAudio_Count];
-    TELY_AssetSpriteSheet  atlas_sprite_sheet;
-    TELY_RFui              rfui;
-    FP_GamePlay            play;
-    Dqn_Arena             *frame_arena;
-    uint16_t               font_size;
-    uint16_t               large_font_size;
-    uint16_t               large_talkco_font_size;
-    uint16_t               xlarge_talkco_font_size;
+    TELY_AssetAudioHandle     audio[FP_GameAudio_Count];
+    TELY_AudioPlaybackHandle  bg_music1;
+    TELY_AudioPlaybackHandle  bg_music2;
+    TELY_AssetSpriteSheet     atlas_sprite_sheet;
+    TELY_RFui                 rfui;
+    FP_GamePlay               play;
+    Dqn_Arena                *frame_arena;
+    uint16_t                  font_size;
+    uint16_t                  large_font_size;
+    uint16_t                  large_talkco_font_size;
+    uint16_t                  xlarge_talkco_font_size;
 };
 
 struct FP_GameAStarNode