Refactor audio system

CMakeLists.txt

@@ -35,6 +35,7 @@ find_package(spdlog CONFIG REQUIRED)
 
 add_executable(HansTheGatherer
     src/main.cpp
+    src/audio.cpp
     src/assets.cpp
     src/physics.cpp
 )

src/audio.cpp

@@ -0,0 +1,33 @@
+#include "audio.hpp"
+#include "assets.hpp"
+
+AudioModule::AudioModule(flecs::world& world)
+{
+    auto* audio_assets = world.get<AudioAssets>();
+    auto* music_stream = SDL_OpenAudioDeviceStream(
+        SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &audio_assets->background_music.spec, NULL, NULL);
+    auto* sound_stream = SDL_OpenAudioDeviceStream(
+        SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &audio_assets->background_music.spec, NULL, NULL);
+
+    SDL_ResumeAudioStreamDevice(music_stream);
+
+    world.set<AudioStreams>(
+        AudioStreams{.music_stream = music_stream, .sound_stream = sound_stream});
+
+    world.system<AudioStreams, AudioAssets>("FeedAudioStreams")
+        .term_at(0)
+        .singleton()
+        .term_at(1)
+        .singleton()
+        .each(
+            [](AudioStreams& audio_streams, AudioAssets& audio_assets)
+            {
+                if (SDL_GetAudioStreamQueued(audio_streams.music_stream) <
+                    static_cast<int>(audio_assets.background_music.buffer_length))
+                {
+                    SDL_PutAudioStreamData(audio_streams.music_stream,
+                                           audio_assets.background_music.buffer,
+                                           audio_assets.background_music.buffer_length);
+                }
+            });
+}

src/audio.hpp

@@ -2,6 +2,7 @@
 
 #include <SDL3/SDL.h>
 #include <cstdint>
+#include <flecs.h>
 
 struct AudioAsset
 {
@@ -9,3 +10,14 @@ struct AudioAsset
     uint8_t* buffer;
     uint32_t buffer_length;
 };
+
+struct AudioStreams
+{
+    SDL_AudioStream* music_stream;
+    SDL_AudioStream* sound_stream;
+};
+
+struct AudioModule
+{
+    AudioModule(flecs::world& world);
+};

src/main.cpp

@@ -51,6 +51,7 @@ int main()
         SdlHandles{.window = window, .renderer = renderer, .text_engine = text_engine});
 
     world.import <AssetModule>();
+    world.import <AudioModule>();
     world.import <PhysicsModule>();
     world.import <LevelModule>();
 
@@ -116,17 +117,6 @@ int main()
                 TTF_DestroyText(text);
             });
 
-    auto* audio_assets = world.get<AudioAssets>();
-    auto* stream = SDL_OpenAudioDeviceStream(
-        SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &audio_assets->background_music.spec, NULL, NULL);
-    if (!stream)
-    {
-        SDL_Log("Couldn't create audio stream: %s", SDL_GetError());
-        return SDL_APP_FAILURE;
-    }
-
-    SDL_ResumeAudioStreamDevice(stream);
-
     bool exit_gameloop = false;
     while (!exit_gameloop)
     {
@@ -164,14 +154,6 @@ int main()
             }
         }
 
-        // Game Logic
-        if (SDL_GetAudioStreamQueued(stream) < (int)audio_assets->background_music.buffer_length)
-        {
-            SDL_PutAudioStreamData(stream,
-                                   audio_assets->background_music.buffer,
-                                   audio_assets->background_music.buffer_length);
-        }
-
         // Render
         SDL_RenderClear(renderer);
         world.progress();