321 lines
10 KiB
Rust
321 lines
10 KiB
Rust
use std::sync::mpsc;
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use std::sync::mpsc::{Receiver, Sender};
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use std::time::Duration;
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use cpal::Sample;
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use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
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use ggez::{Context, filesystem, GameResult};
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use ggez::GameError::{AudioError, InvalidValue, ResourceLoadError};
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use num_traits::clamp;
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use crate::engine_constants::EngineConstants;
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use crate::sound::organya::Song;
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use crate::sound::pixtone::PixTonePlayback;
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use crate::sound::playback::{PlaybackEngine, SavedPlaybackState};
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use crate::sound::wave_bank::SoundBank;
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use crate::str;
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mod wave_bank;
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mod organya;
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mod pixtone;
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mod pixtone_sfx;
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mod playback;
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mod stuff;
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mod wav;
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pub struct SoundManager {
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tx: Sender<PlaybackMessage>,
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prev_song_id: usize,
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current_song_id: usize,
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}
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static SONGS: [&str; 43] = [
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"xxxx",
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"wanpaku",
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"anzen",
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"gameover",
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"gravity",
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"weed",
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"mdown2",
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"fireeye",
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"vivi",
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"mura",
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"fanfale1",
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"ginsuke",
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"cemetery",
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"plant",
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"kodou",
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"fanfale3",
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"fanfale2",
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"dr",
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"escape",
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"jenka",
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"maze",
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"access",
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"ironh",
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"grand",
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"curly",
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"oside",
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"requiem",
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"wanpak2",
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"quiet",
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"lastcave",
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"balcony",
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"lastbtl",
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"lastbt3",
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"ending",
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"zonbie",
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"bdown",
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"hell",
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"jenka2",
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"marine",
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"ballos",
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"toroko",
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"white",
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"kaze"
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];
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impl SoundManager {
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pub fn new(ctx: &mut Context) -> GameResult<SoundManager> {
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let (tx, rx): (Sender<PlaybackMessage>, Receiver<PlaybackMessage>) = mpsc::channel();
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let host = cpal::default_host();
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let device = host.default_output_device().ok_or_else(|| AudioError(str!("Error initializing audio device.")))?;
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let config = device.default_output_config()?;
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let bnk = wave_bank::SoundBank::load_from(filesystem::open(ctx, "/builtin/pixtone.pcm")?)?;
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std::thread::spawn(move || {
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if let Err(err) = match config.sample_format() {
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cpal::SampleFormat::F32 => run::<f32>(rx, bnk, &device, &config.into()),
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cpal::SampleFormat::I16 => run::<i16>(rx, bnk, &device, &config.into()),
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cpal::SampleFormat::U16 => run::<u16>(rx, bnk, &device, &config.into()),
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} {
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log::error!("Something went wrong in audio thread: {}", err);
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}
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});
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Ok(SoundManager {
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tx: tx.clone(),
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prev_song_id: 0,
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current_song_id: 0,
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})
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}
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pub fn play_sfx(&mut self, id: u8) {
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self.tx.send(PlaybackMessage::PlaySample(id));
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}
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pub fn play_song(&mut self, song_id: usize, constants: &EngineConstants, ctx: &mut Context) -> GameResult {
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if self.current_song_id == song_id {
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return Ok(());
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}
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if song_id == 0 {
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log::info!("Stopping BGM");
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self.prev_song_id = self.current_song_id;
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self.current_song_id = 0;
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self.tx.send(PlaybackMessage::SaveState)?;
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self.tx.send(PlaybackMessage::Stop)?;
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} else if let Some(song_name) = SONGS.get(song_id) {
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let path = constants.organya_paths
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.iter()
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.map(|prefix| [prefix, &song_name.to_lowercase(), ".org"].join(""))
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.find(|path| filesystem::exists(ctx, path))
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.ok_or_else(|| ResourceLoadError(format!("BGM {:?} does not exist.", song_name)))?;
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let org = organya::Song::load_from(filesystem::open(ctx, path)?)?;
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log::info!("Playing BGM: {}", song_name);
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self.prev_song_id = self.current_song_id;
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self.current_song_id = song_id;
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self.tx.send(PlaybackMessage::SaveState)?;
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self.tx.send(PlaybackMessage::PlaySong(Box::new(org)))?;
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}
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Ok(())
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}
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pub fn save_state(&mut self) -> GameResult {
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self.tx.send(PlaybackMessage::SaveState)?;
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self.prev_song_id = self.current_song_id;
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Ok(())
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}
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pub fn restore_state(&mut self) -> GameResult {
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self.tx.send(PlaybackMessage::RestoreState)?;
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self.current_song_id = self.prev_song_id;
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Ok(())
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}
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pub fn set_speed(&mut self, speed: f32) -> GameResult {
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if speed <= 0.0 {
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return Err(InvalidValue(str!("Speed must be bigger than 0.0!")));
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}
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self.tx.send(PlaybackMessage::SetSpeed(speed))?;
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Ok(())
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}
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pub fn current_song(&self) -> usize {
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self.current_song_id
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}
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}
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enum PlaybackMessage {
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Stop,
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PlaySong(Box<Song>),
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PlaySample(u8),
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SetSpeed(f32),
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SaveState,
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RestoreState,
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}
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#[derive(PartialEq, Eq)]
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enum PlaybackState {
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Stopped,
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Playing,
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}
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fn run<T>(rx: Receiver<PlaybackMessage>, bank: SoundBank,
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device: &cpal::Device, config: &cpal::StreamConfig) -> GameResult where
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T: cpal::Sample,
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{
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let sample_rate = config.sample_rate.0 as f32;
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let channels = config.channels as usize;
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let mut state = PlaybackState::Stopped;
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let mut saved_state: Option<SavedPlaybackState> = None;
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let mut speed = 1.0;
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let mut org_engine = PlaybackEngine::new(Song::empty(), &bank);
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let mut pixtone = PixTonePlayback::new();
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pixtone.create_samples();
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log::info!("Audio format: {} {}", sample_rate, channels);
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org_engine.set_sample_rate(sample_rate as usize);
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org_engine.loops = usize::MAX;
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let mut bgm_buf = vec![0x8080; 441];
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let mut pxt_buf = vec![0x8000; 441];
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let mut bgm_index = 0;
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let mut pxt_index = 0;
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let mut frames = org_engine.render_to(&mut bgm_buf);
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pixtone.mix(&mut pxt_buf, sample_rate);
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let err_fn = |err| eprintln!("an error occurred on stream: {}", err);
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let stream = device.build_output_stream(
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config,
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move |data: &mut [T], _: &cpal::OutputCallbackInfo| {
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loop {
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match rx.try_recv() {
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Ok(PlaybackMessage::PlaySong(song)) => {
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if state == PlaybackState::Stopped {
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saved_state = None;
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}
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org_engine.start_song(*song, &bank);
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for i in &mut bgm_buf[0..frames] { *i = 0x8080 };
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frames = org_engine.render_to(&mut bgm_buf);
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bgm_index = 0;
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state = PlaybackState::Playing;
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}
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Ok(PlaybackMessage::PlaySample(id)) => {
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pixtone.play_sfx(id);
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}
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Ok(PlaybackMessage::Stop) => {
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if state == PlaybackState::Stopped {
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saved_state = None;
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}
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state = PlaybackState::Stopped;
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}
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Ok(PlaybackMessage::SetSpeed(new_speed)) => {
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assert!(new_speed > 0.0);
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speed = new_speed;
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org_engine.set_sample_rate((sample_rate / new_speed) as usize);
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}
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Ok(PlaybackMessage::SaveState) => {
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saved_state = Some(org_engine.get_state());
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}
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Ok(PlaybackMessage::RestoreState) => {
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if saved_state.is_some() {
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org_engine.set_state(saved_state.clone().unwrap(), &bank);
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saved_state = None;
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if state == PlaybackState::Stopped {
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org_engine.set_position(0);
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}
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for i in &mut bgm_buf[0..frames] { *i = 0x8080 };
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frames = org_engine.render_to(&mut bgm_buf);
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bgm_index = 0;
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state = PlaybackState::Playing;
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}
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}
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Err(_) => { break; }
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}
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}
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for frame in data.chunks_mut(channels) {
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let (org_sample_l, org_sample_r): (u16, u16) = {
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if state == PlaybackState::Stopped {
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(0x8000, 0x8000)
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} else if bgm_index < frames {
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let sample = bgm_buf[bgm_index];
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bgm_index += 1;
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((sample & 0xff) << 8, sample & 0xff00)
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} else {
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for i in &mut bgm_buf[0..frames] { *i = 0x8080 };
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frames = org_engine.render_to(&mut bgm_buf);
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bgm_index = 0;
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let sample = bgm_buf[0];
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((sample & 0xff) << 8, sample & 0xff00)
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}
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};
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let pxt_sample: u16 = pxt_buf[pxt_index];
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if pxt_index < (pxt_buf.len() - 1) {
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pxt_index += 1;
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} else {
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pxt_index = 0;
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for i in pxt_buf.iter_mut() { *i = 0x8000 };
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pixtone.mix(&mut pxt_buf, sample_rate / speed);
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}
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if frame.len() >= 2 {
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let sample_l = clamp(
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(((org_sample_l ^ 0x8000) as i16) as isize)
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+ (((pxt_sample ^ 0x8000) as i16) as isize)
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, -0x7fff, 0x7fff) as u16 ^ 0x8000;
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let sample_r = clamp(
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(((org_sample_r ^ 0x8000) as i16) as isize)
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+ (((pxt_sample ^ 0x8000) as i16) as isize)
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, -0x7fff, 0x7fff) as u16 ^ 0x8000;
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frame[0] = Sample::from::<u16>(&sample_l);
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frame[1] = Sample::from::<u16>(&sample_r);
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} else {
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let sample = clamp(
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(((org_sample_l ^ 0x8000) as i16) as isize)
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+ (((pxt_sample ^ 0x8000) as i16) as isize)
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, -0x7fff, 0x7fff) as u16 ^ 0x8000;
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frame[0] = Sample::from::<u16>(&sample);
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}
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}
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},
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err_fn,
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)?;
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stream.play()?;
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loop {
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std::thread::sleep(Duration::from_millis(10));
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}
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}
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