song state save/restore

src/sound/mod.rs

@@ -9,7 +9,7 @@ use crate::engine_constants::EngineConstants;
 use crate::ggez::{Context, filesystem, GameResult};
 use crate::ggez::GameError::AudioError;
 use crate::sound::organya::Song;
-use crate::sound::playback::PlaybackEngine;
+use crate::sound::playback::{PlaybackEngine, SavedPlaybackState};
 use crate::sound::wave_bank::SoundBank;
 use crate::str;
 
@@ -101,20 +101,39 @@ impl SoundManager {
             return Ok(());
         }
 
-        if let Some(song_name) = SONGS.get(song_id) {
+        if song_id == 0 {
+            log::info!("Stopping BGM");
+
+            self.current_song_id = 0;
+            self.tx.send(PlaybackMessage::Stop)?;
+        } else if let Some(song_name) = SONGS.get(song_id) {
             let org = organya::Song::load_from(filesystem::open(ctx, ["/base/Org/", &song_name.to_lowercase(), ".org"].join(""))?)?;
-            log::info!("Playing song: {}", song_name);
+            log::info!("Playing BGM: {}", song_name);
 
             self.current_song_id = song_id;
-            self.tx.send(PlaybackMessage::PlaySong(org));
+            self.tx.send(PlaybackMessage::PlaySong(Box::new(org)))?;
         }
         Ok(())
     }
+
+    pub fn save_state(&mut self) -> GameResult {
+        self.tx.send(PlaybackMessage::SaveState)?;
+
+        Ok(())
+    }
+
+    pub fn restore_state(&mut self) -> GameResult {
+        self.tx.send(PlaybackMessage::RestoreState)?;
+
+        Ok(())
+    }
 }
 
 enum PlaybackMessage {
     Stop,
-    PlaySong(Song),
+    PlaySong(Box<Song>),
+    SaveState,
+    RestoreState,
 }
 
 #[derive(PartialEq, Eq)]
@@ -130,7 +149,7 @@ fn run<T>(rx: Receiver<PlaybackMessage>, bank: SoundBank,
     let sample_rate = config.sample_rate.0 as f32;
     let channels = config.channels as usize;
     let mut state = PlaybackState::Stopped;
-    let mut new_song: Option<Song> = None;
+    let mut saved_state: Option<SavedPlaybackState> = None;
     let mut engine = PlaybackEngine::new(Song::empty(), &bank);
 
     log::info!("Audio format: {} {}", sample_rate, channels);
@@ -148,7 +167,7 @@ fn run<T>(rx: Receiver<PlaybackMessage>, bank: SoundBank,
         move |data: &mut [T], _: &cpal::OutputCallbackInfo| {
             match rx.try_recv() {
                 Ok(PlaybackMessage::PlaySong(song)) => {
-                    engine.start_song(song, &bank);
+                    engine.start_song(*song, &bank);
 
                     for i in &mut buf[0..frames] { *i = 0x8080 };
                     frames = engine.render_to(&mut buf);
@@ -156,6 +175,21 @@ fn run<T>(rx: Receiver<PlaybackMessage>, bank: SoundBank,
 
                     state = PlaybackState::Playing;
                 }
+                Ok(PlaybackMessage::SaveState) => {
+                    saved_state = Some(engine.get_state());
+                }
+                Ok(PlaybackMessage::RestoreState) => {
+                    if saved_state.is_some() {
+                        engine.set_state(saved_state.clone().unwrap(), &bank);
+                        saved_state = None;
+
+                        for i in &mut buf[0..frames] { *i = 0x8080 };
+                        frames = engine.render_to(&mut buf);
+                        index = 0;
+
+                        state = PlaybackState::Playing;
+                    }
+                }
                 _ => {}
             }
 

src/sound/playback.rs

@@ -18,11 +18,20 @@ pub struct PlaybackEngine {
     pub loops: usize,
 }
 
-pub struct PlaybackState {
+pub struct SavedPlaybackState {
     song: Organya,
     play_pos: i32,
 }
 
+impl Clone for SavedPlaybackState {
+    fn clone(&self) -> SavedPlaybackState {
+        SavedPlaybackState {
+            song: self.song.clone(),
+            play_pos: self.play_pos,
+        }
+    }
+}
+
 impl PlaybackEngine {
     pub fn new(song: Organya, samples: &SoundBank) -> Self {
 
@@ -98,14 +107,14 @@ impl PlaybackEngine {
         self.frames_per_tick = (sample_rate / 1000) * self.song.time.wait as usize;
     }
 
-    pub fn get_state(&self) -> PlaybackState {
-        PlaybackState {
+    pub fn get_state(&self) -> SavedPlaybackState {
+        SavedPlaybackState {
             song: self.song.clone(),
             play_pos: self.play_pos,
         }
     }
 
-    pub fn set_state(&mut self, state: PlaybackState, samples: &SoundBank) {
+    pub fn set_state(&mut self, state: SavedPlaybackState, samples: &SoundBank) {
         self.start_song(state.song, samples);
         self.play_pos = state.play_pos;
     }

src/text_script.rs

@@ -628,14 +628,25 @@ impl TextScriptVM {
                     OpCode::CMU => {
                         let song_id = read_cur_varint(&mut cursor)? as usize;
                         state.sound_manager.play_song(song_id, &state.constants, ctx)?;
+
+                        exec_state = TextScriptExecutionState::Running(event, cursor.position() as u32);
+                    }
+                    OpCode::FMU => {
+                        state.sound_manager.save_state()?;
+
+                        exec_state = TextScriptExecutionState::Running(event, cursor.position() as u32);
+                    }
+                    OpCode::RMU => {
+                        state.sound_manager.restore_state()?;
+
                         exec_state = TextScriptExecutionState::Running(event, cursor.position() as u32);
                     }
                     // unimplemented opcodes
                     // Zero operands
                     OpCode::AEp | OpCode::CAT | OpCode::CIL | OpCode::CPS |
-                    OpCode::CRE | OpCode::CSS | OpCode::ESC | OpCode::FLA | OpCode::FMU |
+                    OpCode::CRE | OpCode::CSS | OpCode::ESC | OpCode::FLA |
                     OpCode::INI | OpCode::LDP | OpCode::MLP | OpCode::MNA |
-                    OpCode::RMU | OpCode::SAT | OpCode::SLP | OpCode::SPS |
+                    OpCode::SAT | OpCode::SLP | OpCode::SPS |
                     OpCode::STC | OpCode::SVP | OpCode::TUR | OpCode::WAS | OpCode::ZAM => {
                         log::warn!("unimplemented opcode: {:?}", op);
 
@@ -751,7 +762,7 @@ impl TextScript {
 
     /// Compiles a decrypted text script data into internal bytecode.
     pub fn compile(data: &[u8], strict: bool) -> GameResult<TextScript> {
-        println!("data: {}", String::from_utf8_lossy(data));
+        log::debug!("data: {}", String::from_utf8_lossy(data));
 
         let mut event_map = HashMap::new();
         let mut iter = data.iter().copied().peekable();
@@ -778,7 +789,6 @@ impl TextScript {
 
                     let bytecode = TextScript::compile_event(&mut iter, strict)?;
                     log::info!("Successfully compiled event #{} ({} bytes generated).", event_num, bytecode.len());
-                    println!("{:x?}", &bytecode);
                     event_map.insert(event_num, bytecode);
                 }
                 b'\r' | b'\n' | b' ' | b'\t' => {