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#![allow(clippy::type_complexity)] use crate::{ audio_asset_protocol::AudioAsset, component::{AudioSource, AudioSourceDirtyMode}, resource::Audio, }; use core::{ assets::database::AssetsDatabase, ecs::{ storage::ComponentEvent, Entities, Entity, Join, Read, ReaderId, System, World, Write, WriteStorage, }, }; use std::{collections::HashSet, marker::PhantomData}; pub struct AudioSystem<A> where A: Audio, { cached_sources: HashSet<Entity>, reader_id: Option<ReaderId<ComponentEvent>>, _phantom: PhantomData<A>, } impl<A> Default for AudioSystem<A> where A: Audio, { fn default() -> Self { Self { cached_sources: HashSet::new(), reader_id: None, _phantom: PhantomData, } } } impl<'s, A> System<'s> for AudioSystem<A> where A: Audio + 'static, { type SystemData = ( Entities<'s>, Option<Write<'s, A>>, Option<Read<'s, AssetsDatabase>>, WriteStorage<'s, AudioSource>, ); fn setup(&mut self, world: &mut World) { use core::ecs::SystemData; Self::SystemData::setup(world); self.reader_id = Some(WriteStorage::<AudioSource>::fetch(&world).register_reader()); } fn run(&mut self, (entities, audio, assets, mut sources): Self::SystemData) { if audio.is_none() || assets.is_none() { return; } let audio: &mut A = &mut audio.unwrap(); let assets: &AssetsDatabase = &assets.unwrap(); audio.update_cache(assets); let events = sources.channel().read(self.reader_id.as_mut().unwrap()); for event in events { if let ComponentEvent::Removed(index) = event { let found = self.cached_sources.iter().find_map(|entity| { if entity.id() == *index { Some(*entity) } else { None } }); if let Some(entity) = found { self.cached_sources.remove(&entity); audio.destroy_source(entity); } } } for (entity, source) in (&entities, &mut sources).join() { if source.dirty != AudioSourceDirtyMode::None { if !audio.has_source(entity) { if let Some(id) = audio.get_asset_id(source.audio()) { if let Some(asset) = assets.asset_by_id(id) { if let Some(asset) = asset.get::<AudioAsset>() { audio.create_source( entity, asset.bytes(), source.streaming(), source.looped(), source.playback_rate(), source.volume(), source.must_play(), source.ready.clone(), ); self.cached_sources.insert(entity); source.dirty = AudioSourceDirtyMode::None; } } } } else { audio.update_source( entity, source.looped(), source.playback_rate(), source.volume(), if source.dirty == AudioSourceDirtyMode::All { Some(source.must_play()) } else { None }, ); source.dirty = AudioSourceDirtyMode::None; } } if let Some(state) = audio.get_source_state(entity) { source.current_time = state.current_time; } } } }