1 files changed, 71 insertions, 0 deletions
diff --git a/src/crepe/system/AudioSystem.cpp b/src/crepe/system/AudioSystem.cpp
new file mode 100644
index 0000000..84a101a
--- /dev/null
+++ b/src/crepe/system/AudioSystem.cpp
@@ -0,0 +1,71 @@
+#include "AudioSystem.h"
+
+#include "../manager/ComponentManager.h"
+#include "../manager/ResourceManager.h"
+#include "../types.h"
+
+using namespace crepe;
+using namespace std;
+
+void AudioSystem::update() {
+	ComponentManager & component_manager = this->mediator.component_manager;
+	ResourceManager & resource_manager = this->mediator.resource_manager;
+	RefVector<AudioSource> components = component_manager.get_components_by_type<AudioSource>();
+
+	for (AudioSource & component : components) {
+		Sound & resource = resource_manager.get<Sound>(component.source);
+
+		if (component.private_data.empty()) {
+			auto & data = component.private_data.set<ComponentPrivate>();
+			this->update_last(component, data);
+			data.last_active = false;
+		}
+		auto & data = component.private_data.get<ComponentPrivate>();
+
+		this->diff_update(component, data, resource);
+
+		this->update_last(component, data);
+	}
+}
+
+void AudioSystem::diff_update(AudioSource & component, ComponentPrivate & data, Sound & resource) {
+	SoundContext & context = this->get_context();
+
+	if (component.active != data.last_active) {
+		if (component.active) {
+			component.oneshot_play = component.play_on_awake;
+		} else {
+			context.stop(data.handle);
+			return;
+		}
+	}
+	if (!component.active) return;
+
+	if (component.oneshot_play) {
+		data.handle = context.play(resource);
+		component.oneshot_play = false;
+	}
+	if (component.oneshot_stop) {
+		context.stop(data.handle);
+		component.oneshot_stop = false;
+	}
+	if (component.volume != data.last_volume) {
+		context.set_volume(resource, data.handle, component.volume);
+	}
+	if (component.loop != data.last_loop) {
+		context.set_loop(resource, data.handle, component.loop);
+	}
+}
+
+void AudioSystem::update_last(const AudioSource & component, ComponentPrivate & data) {
+	data.last_active = component.active;
+	data.last_loop = component.loop;
+	data.last_volume = component.volume;
+}
+
+SoundContext & AudioSystem::get_context() {
+	if (this->context.empty())
+		this->context.set<SoundContext>();
+	return this->context.get<SoundContext>();
+}
+