Get sound effects working

voxygen/src/audio/channel.rs

@@ -1,4 +1,4 @@
-use rodio::{SpatialSink, Decoder, Device};
+use rodio::{SpatialSink, Decoder, Device, Source, Sample};
 use std::io::BufReader;
 use std::fs::File;
 use crate::audio::fader::Fader;
@@ -8,6 +8,7 @@ use vek::*;
 pub enum AudioType {
     Sfx,
     Music,
+    None,
 }
 
 #[derive(PartialEq, Clone, Copy)]
@@ -27,10 +28,22 @@ pub struct Channel {
     state: ChannelState,
     fader: Fader,
     pub pos: Vec3::<f32>,
-    // sound_cache: Option<&SoundCache>,
 }
 
+// TODO: Implement asynchronous loading
 impl Channel {
+    /// Create an empty channel for future use
+    pub fn new(device: &Device) -> Self {
+        Self {
+            id: 0,
+            sink: SpatialSink::new(device, [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [-1.0, 0.0, 0.0]),
+            audio_type: AudioType::None,
+            state: ChannelState::Stopped,
+            fader: Fader::fade_in(0.0),
+            pos: Vec3::zero(),
+        }
+    }
+
     pub fn music(id: usize, device: &Device, bufr: BufReader<File>) -> Self {
         let sink = SpatialSink::new(device, [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [-1.0, 0.0, 0.0]);
         let sound = Decoder::new(bufr).unwrap();
@@ -44,7 +57,6 @@ impl Channel {
             state: ChannelState::Playing,
             fader: Fader::fade_in(0.0),
             pos: Vec3::zero(),
-            // sound_cache: None,
         }
     }
 
@@ -56,10 +68,20 @@ impl Channel {
             state: ChannelState::Playing,
             fader: Fader::fade_in(0.0),
             pos,
-            // sound_cache,
         }
     }
 
+    pub fn play<S>(&mut self, source: S)
+    where
+        S: Source + Send + 'static,
+        S::Item: Sample,
+        S::Item: Send,
+    <S as std::iter::Iterator>::Item: std::fmt::Debug,
+    {
+        self.state = ChannelState::Playing;
+        self.sink.append(source);
+    }
+
     pub fn is_done(&self) -> bool {
         self.sink.empty() || self.state == ChannelState::Stopped
     }
@@ -73,6 +95,10 @@ impl Channel {
         self.id
     }
 
+    pub fn set_id(&mut self, new_id: usize) {
+        self.id = new_id;
+    }
+
     pub fn get_audio_type(&self) -> AudioType {
         self.audio_type
     }
@@ -102,6 +128,7 @@ impl Channel {
             ChannelState::Stopping  => {
                 self.fader.update(dt);
                 self.sink.set_volume(self.fader.get_volume());
+
                 if self.fader.is_finished() {
                     self.state = ChannelState::Stopped;
                 }

voxygen/src/audio/mod.rs

@@ -33,14 +33,21 @@ pub struct AudioFrontend {
 
 impl AudioFrontend {
     /// Construct with given device
-    pub fn new(device: String) -> Self {
+    pub fn new(device: String, channel_num: usize) -> Self {
+        let mut channels = Vec::with_capacity(channel_num);
+        let audio_device = get_device_raw(&device);
+        if let Some(audio_device) = &audio_device {
+            for i in (0..channel_num) {
+                channels.push(Channel::new(&audio_device));
+            }
+        }
         Self {
             device: device.clone(),
             device_list: list_devices(),
-            audio_device: get_device_raw(device),
+            audio_device,
             sound_cache: SoundCache::new(),
-            channels: Vec::new(),
-            next_channel_id: 0,
+            channels: channels,
+            next_channel_id: 1,
             sfx_volume: 1.0,
             music_volume: 1.0,
             listener_pos: Vec3::zero(),
@@ -58,7 +65,7 @@ impl AudioFrontend {
             audio_device: None,
             sound_cache: SoundCache::new(),
             channels: Vec::new(),
-            next_channel_id: 0,
+            next_channel_id: 1,
             sfx_volume: 1.0,
             music_volume: 1.0,
             listener_pos: Vec3::zero(),
@@ -70,18 +77,15 @@ impl AudioFrontend {
 
     /// Maintain audio
     pub fn maintain(&mut self, dt: f32) {
-        let mut stopped_channels = Vec::<usize>::new();
         for (i, channel) in self.channels.iter_mut().enumerate() {
             channel.update(dt);
-            if channel.is_done() {
-                stopped_channels.push(i);
-            }
-        }
-        for i in stopped_channels.iter().rev() {
-            self.channels.remove(*i);
         }
     }
 
+    pub fn get_channel(&mut self) -> Option<&mut Channel> {
+        self.channels.iter_mut().find(|c| c.is_done())
+    }
+
     /// Play specfied sound file.
     ///```ignore
     ///audio.play_sound("voxygen.audio.sfx.step");
@@ -96,15 +100,21 @@ impl AudioFrontend {
                 (pos.y - self.listener_pos.y) * FALLOFF,
                 (pos.z - self.listener_pos.z) * FALLOFF,
             ];
-            let sink = SpatialSink::new(device, calc_pos,
-                                        self.listener_pos_left,
-                                        self.listener_pos_right);
 
             let sound = self.sound_cache.load_sound(sound);
 
-            sink.append(sound);
+            let left_ear = self.listener_pos_left;
+            let right_ear = self.listener_pos_right;
 
-            self.channels.push(Channel::sfx(id, sink, pos));
+            if let Some(channel) = self.get_channel() {
+                channel.set_id(id);
+                channel.set_emitter_position(calc_pos);
+                channel.set_left_ear_position(left_ear);
+                channel.set_right_ear_position(right_ear);
+                channel.play(sound);
+            } else {
+                println!("No available channels!");
+            }
         }
 
         id
@@ -141,8 +151,12 @@ impl AudioFrontend {
 
         if let Some(device) = &self.audio_device {
             let file = assets::load_file(&sound, &["ogg"]).unwrap();
+            let sound = Decoder::new(file).unwrap();
 
-            self.channels.push(Channel::music(id, device, file));
+            if let Some(channel) = self.get_channel() {
+                channel.set_id(id);
+                channel.play(sound);
+            }
         }
 
         id
@@ -186,7 +200,7 @@ impl AudioFrontend {
     // TODO: figure out how badly this will break things when it is called
     pub fn set_device(&mut self, name: String) {
         self.device = name.clone();
-        self.audio_device = get_device_raw(name);
+        self.audio_device = get_device_raw(&name);
     }
 }
 
@@ -230,6 +244,6 @@ fn list_devices_raw() -> Vec<Device> {
     rodio::output_devices().collect()
 }
 
-fn get_device_raw(device: String) -> Option<Device> {
+fn get_device_raw(device: &str) -> Option<Device> {
     rodio::output_devices().find(|d| d.name() == device)
 }

voxygen/src/main.rs

@@ -114,7 +114,7 @@ fn main() {
         None => audio::get_default_device(),
     };
     let audio = if settings.audio.audio_on {
-        AudioFrontend::new(audio_device)
+        AudioFrontend::new(audio_device, 16)
     } else {
         AudioFrontend::no_audio()
     };

voxygen/src/menu/main/mod.rs

@@ -34,8 +34,6 @@ impl PlayState for MainMenuState {
         // Used for client creation.
         let mut client_init: Option<ClientInit> = None;
 
-        let music = global_state.audio.play_music("voxygen.audio.soundtrack.veloren_title_tune-3".to_string());
-
         loop {
             // Handle window events.
             for event in global_state.window.fetch_events() {