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use bevy::{audio::PlaybackMode, prelude::*};
use bitvec::prelude::*;
use crate::pico8::audio::{Sfx, SfxChannels};
use std::sync::{
atomic::{AtomicBool, Ordering},
Arc,
};
pub(crate) fn plugin(app: &mut App) {
app
.register_type::<Audio>()
.register_type::<AudioBank>()
.init_asset::<AudioBank>();
}
#[derive(Clone, Debug, Deref, DerefMut, Reflect, Asset)]
pub struct AudioBank(pub Vec<Audio>);
#[derive(Debug, Clone, Reflect)]
pub enum Audio {
Sfx(Handle<Sfx>),
AudioSource(Handle<AudioSource>),
}
pub enum SfxDest {
Any,
All,
// Channel(Entity),
Channel(u8),
ChannelMask(u8),
}
pub enum AudioCommand {
Stop(SfxDest, Option<PlaybackMode>),
Play(Audio, SfxDest, PlaybackSettings),
Release(SfxDest),
}
#[derive(Component)]
struct SfxRelease(Arc<AtomicBool>);
fn mode_eq(a: PlaybackMode, b: PlaybackMode) -> bool {
std::mem::discriminant(&a) == std::mem::discriminant(&b)
}
#[cfg(feature = "mute")]
impl Command for AudioCommand {
fn apply(self, world: &mut World) { }
}
#[cfg(not(feature = "mute"))]
impl Command for AudioCommand {
fn apply(self, world: &mut World) {
match self {
AudioCommand::Stop(sfx_channel, mode) => {
match sfx_channel {
SfxDest::All => {
// TODO: Consider using smallvec for channels.
let channels: Vec<Entity> = (*world.resource::<SfxChannels>()).clone();
for chan in channels {
if let Some(mode) = mode {
if !world
.get::<PlaybackSettings>(chan)
.map(|s| mode_eq(s.mode, mode))
.unwrap_or(true)
{
continue;
}
}
if let Some(ref mut sink) = world.get_mut::<AudioSink>(chan) {
sink.stop();
}
let mut commands = world.commands();
commands.entity(chan).remove::<(
// AudioPlayer<T>,
AudioSink,
PlaybackSettings,
// PlaybackRemoveMarker,
)>();
}
}
SfxDest::Channel(chan) => {
let id = world
.get_resource::<SfxChannels>()
.and_then(|sfx_channels| sfx_channels.get(chan as usize));
if let Some(id) = id {
if let Some(ref mut sink) = world.get_mut::<AudioSink>(*id) {
sink.stop();
}
} else {
warn!("Could not find audio channel {chan}");
}
}
SfxDest::ChannelMask(channel_mask) => {
for i in channel_mask.view_bits::<Lsb0>().iter_ones() {
let id = world
.get_resource::<SfxChannels>()
.and_then(|sfx_channels| sfx_channels.get(i))
.copied();
if let Some(id) = id {
if let Some(ref mut sink) = world.get_mut::<AudioSink>(id) {
sink.stop();
}
let mut commands = world.commands();
commands.entity(id).remove::<(
// AudioPlayer<T>,
AudioSink,
PlaybackSettings,
// PlaybackRemoveMarker,
)>();
} else {
warn!("Could not find audio channel {i}");
}
}
}
SfxDest::Any => {
warn!("Cannot stop 'any' channels.");
}
}
}
AudioCommand::Release(sfx_channel) => match sfx_channel {
SfxDest::Channel(channel) => {
let id = world
.get_resource::<SfxChannels>()
.and_then(|sfx_channels| sfx_channels.get(channel as usize));
if let Some(id) = id {
if let Some(sfx_release) = world.get::<SfxRelease>(*id) {
sfx_release.0.store(true, Ordering::Relaxed);
} else {
warn!("Released a channel that did not have a sfx loop.");
}
} else {
warn!("Could not find audio channel {channel}");
}
}
SfxDest::Any => {}
SfxDest::All => {}
SfxDest::ChannelMask(_) => {}
},
AudioCommand::Play(audio, sfx_channel, playback_settings) => {
match sfx_channel {
SfxDest::Any => {
if let Some(available_channel) = world
.resource::<SfxChannels>()
.iter()
.find(|id| {
world
.get::<AudioSink>(**id)
.map(|s| s.is_paused() || s.empty())
.unwrap_or(true)
})
.copied()
{
match audio {
Audio::Sfx(sfx) => {
let (sfx, release) = Sfx::get_stoppable_handle(sfx, world);
let mut commands = world.commands();
if let Some(release) = release {
commands
.entity(available_channel)
.insert(SfxRelease(release));
}
commands
.entity(available_channel)
.insert((AudioPlayer(sfx), playback_settings));
}
Audio::AudioSource(source) => {
let mut commands = world.commands();
commands
.entity(available_channel)
.insert((AudioPlayer(source), playback_settings));
}
}
} else {
// The channels may be busy. If we log it, it can be
// noisy in the log despite it not having much of an
// effect to the game, so we're not going to log it.
warn_once!("Channels busy.");
}
}
SfxDest::ChannelMask(mask) => {
let mask_bits = mask.view_bits::<Lsb0>();
if let Some(available_channel) = world
.resource::<SfxChannels>()
.iter()
.enumerate()
.find_map(|(i, id)| {
(*mask_bits.get(i).as_deref().unwrap_or(&false)
&& world
.get::<AudioSink>(*id)
.map(|s| s.is_paused() || s.empty())
.unwrap_or(true))
.then_some(id)
})
.copied()
{
match audio {
Audio::Sfx(sfx) => {
let (sfx, release) = Sfx::get_stoppable_handle(sfx, world);
let mut commands = world.commands();
if let Some(release) = release {
commands
.entity(available_channel)
.insert(SfxRelease(release));
}
commands
.entity(available_channel)
.insert((AudioPlayer(sfx), playback_settings));
}
Audio::AudioSource(source) => {
let mut commands = world.commands();
commands
.entity(available_channel)
.insert((AudioPlayer(source), playback_settings));
}
}
} else {
// The channels may be busy. If we log it, it can be
// noisy in the log despite it not having much of an
// effect to the game, so we're not going to log it.
warn_once!("Channels busy for mask {mask}.");
}
}
SfxDest::Channel(chan) => {
let id = world
.get_resource::<SfxChannels>()
.and_then(|sfx_channels| sfx_channels.get(chan as usize))
.copied();
let mut commands = world.commands();
if let Some(id) = id {
match audio {
Audio::Sfx(sfx) => {
commands
.entity(id)
.insert((AudioPlayer(sfx.clone()), playback_settings));
}
Audio::AudioSource(source) => {
commands
.entity(id)
.insert((AudioPlayer(source), playback_settings));
}
}
} else {
warn!("Could not find audio channel {chan}");
}
}
SfxDest::All => {
warn!("Cannot play on all channels.");
}
}
}
}
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_matches_eq() {
let x = PlaybackMode::Once;
let y = PlaybackMode::Loop;
// The y in the match expression below is not the y above this line.
assert!(matches!(x, _y));
assert!(!mode_eq(x, y));
}
}