bevy_synthizer/src/lib.rs

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#![allow(clippy::type_complexity)]
use std::collections::HashMap;
use bevy::{
asset::{AssetLoader, LoadContext, LoadedAsset},
prelude::*,
reflect::TypeUuid,
transform::TransformSystem,
utils::BoxedFuture,
};
pub use synthizer as syz;
#[derive(Clone, Deref, DerefMut, PartialEq, TypeUuid)]
#[uuid = "6b6b533a-bb1f-11ec-bda2-00155d8fdde9"]
pub struct Buffer(syz::Buffer);
#[derive(Clone, Copy, Debug, Default)]
struct BufferAssetLoader;
impl AssetLoader for BufferAssetLoader {
fn load<'a>(
&'a self,
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bytes: &'a [u8],
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load_context: &'a mut LoadContext,
) -> BoxedFuture<'a, Result<(), anyhow::Error>> {
Box::pin(async move {
let buffer: Option<Buffer> =
match load_context.path().extension().unwrap().to_str().unwrap() {
"flac" | "mp3" | "wav" => {
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syz::Buffer::from_encoded_data(bytes).map(Buffer).ok()
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}
_ => None,
};
if let Some(buffer) = buffer {
load_context.set_default_asset(LoadedAsset::new(buffer));
}
Ok(())
})
}
fn extensions(&self) -> &[&str] {
&["flac", "mp3", "wav"]
}
}
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#[derive(Component, Clone, Debug, Reflect)]
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#[reflect(Component)]
pub struct Sound {
pub buffer: Handle<Buffer>,
pub gain: f64,
pub pitch: f64,
pub looping: bool,
pub paused: bool,
pub restart: bool,
#[reflect(ignore)]
pub source: Option<syz::Source>,
#[reflect(ignore)]
pub generator: Option<syz::BufferGenerator>,
}
impl Default for Sound {
fn default() -> Self {
Self {
buffer: Default::default(),
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gain: 1.,
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pitch: 1.,
looping: false,
paused: false,
restart: false,
source: None,
generator: None,
}
}
}
#[derive(Component, Clone, Copy, Debug, Deref, DerefMut)]
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pub struct DistanceModel(pub syz::DistanceModel);
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#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
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pub struct DistanceRef(pub f64);
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#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
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pub struct DistanceMax(pub f64);
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#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
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pub struct Rolloff(pub f64);
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#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
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pub struct ClosenessBoost(pub f64);
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#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
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pub struct ClosenessBoostDistance(pub f64);
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#[derive(Component, Clone, Copy, Debug, Default, Reflect)]
#[reflect(Component)]
pub struct AngularPan {
pub azimuth: f64,
pub elevation: f64,
}
#[derive(Component, Clone, Copy, Debug, Default, Deref, DerefMut, Reflect)]
#[reflect(Component)]
pub struct ScalarPan(pub f64);
impl ScalarPan {
pub fn left() -> Self {
Self(-1.)
}
pub fn right() -> Self {
Self(1.)
}
}
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pub enum SynthizerEvent {
Finished(Entity),
Looped(Entity),
}
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#[derive(Component, Clone, Copy, Debug, Default, Reflect)]
#[reflect(Component)]
pub struct Listener;
pub fn update_listener(
context: ResMut<syz::Context>,
listener: Query<(Option<&Transform>, Option<&GlobalTransform>), With<Listener>>,
) {
if let Ok((transform, global_transform)) = listener.get_single() {
let transform: Option<Transform> = global_transform
.map(|v| {
let transform: Transform = (*v).into();
transform
})
.or_else(|| transform.cloned());
if let Some(transform) = transform {
let look = transform.local_x();
let up = transform.local_z();
if let Err(e) = context.position().set((
transform.translation.x as f64,
transform.translation.y as f64,
transform.translation.z as f64,
)) {
error!("Error setting listener position: {:?}", e);
}
if let Err(e) = context.orientation().set((
look.x as f64,
look.y as f64,
look.z as f64,
up.x as f64,
up.y as f64,
up.z as f64,
)) {
error!("Error setting listener orientation: {:?}", e);
}
} else {
context.position().set((0., 0., 0.)).ok();
context.orientation().set((0., 0., 1., 0., 1., 0.)).ok();
}
} else {
context.position().set((0., 0., 0.)).ok();
context.orientation().set((0., 0., 1., 0., 1., 0.)).ok();
}
}
#[derive(Default, Deref, DerefMut)]
struct LastBuffer(HashMap<Entity, Handle<Buffer>>);
fn swap_buffers(mut last_buffer: ResMut<LastBuffer>, mut query: Query<(Entity, &mut Sound)>) {
for (entity, mut sound) in query.iter_mut() {
let buffer = sound.buffer.clone();
if let Some(l) = last_buffer.get(&entity) {
if buffer != *l {
sound.source = None;
sound.generator = None;
}
}
last_buffer.insert(entity, buffer);
}
}
pub fn update_sound_properties(
context: Res<syz::Context>,
buffers: Res<Assets<Buffer>>,
mut query: Query<(
&mut Sound,
Option<&DistanceModel>,
Option<&DistanceRef>,
Option<&DistanceMax>,
Option<&Rolloff>,
Option<&ClosenessBoost>,
Option<&ClosenessBoostDistance>,
Option<&AngularPan>,
Option<&ScalarPan>,
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Option<&Transform>,
Option<&GlobalTransform>,
)>,
) {
for (
mut sound,
distance_model,
distance_ref,
distance_max,
rolloff,
closeness_boost,
closeness_boost_distance,
angular_pan,
scalar_pan,
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transform,
global_transform,
) in query.iter_mut()
{
let Sound {
gain,
pitch,
looping,
..
} = *sound;
if sound.restart {
if let Some(generator) = sound.generator.as_mut() {
generator
.playback_position()
.set(0.)
.expect("Failed to restart");
}
sound.restart = false;
}
if sound.generator.is_none() {
let generator =
syz::BufferGenerator::new(&context).expect("Failed to create generator");
sound.generator = Some(generator);
}
let translation = global_transform
.map(|v| v.translation)
.or_else(|| transform.map(|v| v.translation));
if sound.source.is_none() {
if let Some(b) = buffers.get(sound.buffer.clone()) {
if let Some(generator) = sound.generator.as_mut() {
generator.buffer().set(&**b).expect("Unable to set buffer");
if let Some(translation) = translation {
let source = syz::Source3D::new(
&context,
syz::PannerStrategy::Delegate,
(
translation.x as f64,
translation.y as f64,
translation.z as f64,
),
)
.expect("Failed to create source");
source
.add_generator(generator)
.expect("Unable to add generator");
sound.source = Some(source.into());
} else if let Some(scalar_pan) = scalar_pan {
let source = syz::ScalarPannedSource::new(
&context,
syz::PannerStrategy::Delegate,
**scalar_pan,
)
.expect("Failed to create source");
source
.add_generator(generator)
.expect("Failed to add generator");
sound.source = Some(source.into());
} else if let Some(angular_pan) = angular_pan {
let source = syz::AngularPannedSource::new(
&context,
syz::PannerStrategy::Delegate,
angular_pan.azimuth,
angular_pan.elevation,
)
.expect("Failed to create source");
source
.add_generator(generator)
.expect("Failed to add generator");
sound.source = Some(source.into());
} else {
let source =
syz::DirectSource::new(&context).expect("Failed to create source");
source
.add_generator(generator)
.expect("Failed to add generator");
sound.source = Some(source.into());
}
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}
}
}
if let Some(generator) = sound.generator.as_mut() {
generator.gain().set(gain).expect("Failed to set gain");
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generator
.pitch_bend()
.set(pitch)
.expect("Failed to set pitch");
generator
.looping()
.set(looping)
.expect("Failed to set looping");
}
if let Some(source) = sound.source.as_mut() {
source.gain().set(gain).expect("Failed to set gain");
let mut clear_source = false;
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if let Some(translation) = translation {
if let Some(source) = source.cast_to::<syz::Source3D>().unwrap() {
source
.position()
.set((
translation.x as f64,
translation.y as f64,
translation.z as f64,
))
.expect("Failed to set position");
let distance_model = distance_model
.cloned()
.map(|v| *v)
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.unwrap_or_else(|| context.default_distance_model().get().unwrap());
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source
.distance_model()
.set(distance_model)
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.expect("Failed to set distance_model");
let distance_ref = distance_ref
.map(|v| **v)
.unwrap_or_else(|| context.default_distance_ref().get().unwrap());
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source
.distance_ref()
.set(distance_ref)
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.expect("Failed to set distance_ref");
let distance_max = distance_max
.map(|v| **v)
.unwrap_or_else(|| context.default_distance_max().get().unwrap());
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source
.distance_max()
.set(distance_max)
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.expect("Failed to set distance_max");
let rolloff = rolloff
.map(|v| **v)
.unwrap_or_else(|| context.default_rolloff().get().unwrap());
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source
.rolloff()
.set(rolloff)
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.expect("Failed to set rolloff");
let closeness_boost = closeness_boost
.map(|v| **v)
.unwrap_or_else(|| context.default_closeness_boost().get().unwrap());
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source
.closeness_boost()
.set(closeness_boost)
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.expect("Failed to set closeness_boost");
let closeness_boost_distance =
closeness_boost_distance.map(|v| **v).unwrap_or_else(|| {
context.default_closeness_boost_distance().get().unwrap()
});
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source
.closeness_boost_distance()
.set(closeness_boost_distance)
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.expect("Failed to set closeness_boost_distance");
} else {
clear_source = true;
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}
} else if let Some(angular_pan) = angular_pan {
if let Some(source) = source.cast_to::<syz::AngularPannedSource>().unwrap() {
source
.azimuth()
.set(angular_pan.azimuth)
.expect("Failed to set azimuth");
source
.elevation()
.set(angular_pan.elevation)
.expect("Failed to set elevation");
} else {
clear_source = true;
}
} else if let Some(scalar_pan) = scalar_pan {
if let Some(source) = source.cast_to::<syz::ScalarPannedSource>().unwrap() {
source
.panning_scalar()
.set(**scalar_pan)
.expect("Failed to set scalar panning");
} else {
clear_source = true;
}
}
if clear_source {
sound.source = None;
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}
}
}
}
pub fn update_playback_state(query: Query<&Sound>) {
for sound in query.iter() {
if let Some(generator) = &sound.generator {
if sound.paused {
generator.pause().expect("Failed to pause");
} else {
generator.play().expect("Failed to play");
}
}
}
}
fn remove_sound(mut last_buffer: ResMut<LastBuffer>, removed: RemovedComponents<Sound>) {
for entity in removed.iter() {
last_buffer.remove(&entity);
}
}
#[derive(Clone, Copy, Default, Debug)]
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pub struct SynthizerConfig {
pub default_panner_strategy: Option<syz::PannerStrategy>,
pub default_distance_model: Option<syz::DistanceModel>,
pub default_distance_ref: Option<f64>,
pub default_distance_max: Option<f64>,
pub default_rolloff: Option<f64>,
pub default_closeness_boost: Option<f64>,
pub default_closeness_boost_distance: Option<f64>,
}
#[derive(Debug)]
struct Defaults {
panner_strategy: syz::PannerStrategy,
distance_model: syz::DistanceModel,
distance_ref: f64,
distance_max: f64,
rolloff: f64,
closeness_boost: f64,
closeness_boost_distance: f64,
}
fn sync_config(context: Res<syz::Context>, config: Res<SynthizerConfig>, defaults: Res<Defaults>) {
if config.is_changed() {
context
.default_panner_strategy()
.set(
config
.default_panner_strategy
.unwrap_or(defaults.panner_strategy),
)
.expect("Failed to set panner strategy");
context
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.default_distance_model()
.set(
config
.default_distance_model
.unwrap_or(defaults.distance_model),
)
.expect("Failed to set distance model");
context
.default_distance_ref()
.set(config.default_distance_ref.unwrap_or(defaults.distance_ref))
.expect("Failed to set distance_ref");
context
.default_distance_max()
.set(config.default_distance_max.unwrap_or(defaults.distance_max))
.expect("Failed to set distance_max");
context
.default_rolloff()
.set(config.default_rolloff.unwrap_or(defaults.rolloff))
.expect("Failed to set rolloff");
context
.default_closeness_boost()
.set(
config
.default_closeness_boost
.unwrap_or(defaults.closeness_boost),
)
.expect("Failed to set closeness_boost");
context
.default_closeness_boost_distance()
.set(
config
.default_closeness_boost_distance
.unwrap_or(defaults.closeness_boost_distance),
)
.expect("Failed to set closeness_boost_distance");
}
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}
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fn events(
context: Res<syz::Context>,
sounds: Query<(Entity, &Sound)>,
mut output: EventWriter<SynthizerEvent>,
) {
context.get_events().for_each(|event| {
if let Ok(event) = event {
for (entity, sound) in sounds.iter() {
if let Some(generator) = &sound.generator {
if *generator.handle() == event.source {
match event.r#type {
syz::EventType::Finished => {
output.send(SynthizerEvent::Finished(entity));
}
syz::EventType::Looped => {
output.send(SynthizerEvent::Looped(entity));
}
_ => {}
}
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break;
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}
}
}
}
});
}
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pub struct SynthizerPlugin;
impl Plugin for SynthizerPlugin {
fn build(&self, app: &mut App) {
let guard = syz::initialize().expect("Failed to initialize Synthizer");
let context = syz::Context::new().expect("Failed to create Synthizer context");
if !app.world.contains_resource::<SynthizerConfig>() {
app.insert_resource(SynthizerConfig::default());
}
let defaults = Defaults {
panner_strategy: context.default_panner_strategy().get().unwrap(),
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distance_model: context.default_distance_model().get().unwrap(),
distance_ref: context.default_distance_ref().get().unwrap(),
distance_max: context.default_distance_max().get().unwrap(),
rolloff: context.default_rolloff().get().unwrap(),
closeness_boost: context.default_closeness_boost().get().unwrap(),
closeness_boost_distance: context.default_closeness_boost_distance().get().unwrap(),
};
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context.enable_events().expect("Failed to enable events");
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app.add_asset::<Buffer>()
.init_asset_loader::<BufferAssetLoader>()
.register_type::<Listener>()
.insert_resource(guard)
.insert_resource(context)
.init_resource::<LastBuffer>()
.insert_resource(defaults)
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.add_event::<SynthizerEvent>()
.add_system_to_stage(CoreStage::PreUpdate, sync_config)
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.add_system_to_stage(
CoreStage::PostUpdate,
swap_buffers.before(update_sound_properties),
)
.add_system_to_stage(
CoreStage::PostUpdate,
update_listener
.after(TransformSystem::TransformPropagate)
.before(update_playback_state),
)
.add_system_to_stage(
CoreStage::PostUpdate,
update_sound_properties
.after(TransformSystem::TransformPropagate)
.before(update_playback_state),
)
.add_system_to_stage(CoreStage::PostUpdate, update_playback_state)
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.add_system_to_stage(CoreStage::PostUpdate, remove_sound)
.add_system(events);
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}
}