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//! All things audio.
//!
//! Audio is handled mostly as signals from [dasp_signal]. Input/output is handled by [cpal].
pub mod input;
pub mod output;
pub mod sound_effects;
pub mod transformers;
use crate::error::AudioError;
use crate::network::VoiceStreamType;
use crate::state::StatePhase;
use futures_util::stream::Stream;
use futures_util::StreamExt;
use mumble_protocol::voice::{VoicePacket, VoicePacketPayload};
use mumble_protocol::Serverbound;
use mumlib::config::SoundEffect;
use std::collections::{hash_map::Entry, HashMap};
use std::fmt::Debug;
use std::path::PathBuf;
use std::sync::{Arc, Mutex};
use tokio::sync::watch;
use self::input::{AudioInputDevice, DefaultAudioInputDevice};
use self::output::{AudioOutputDevice, ClientStream, DefaultAudioOutputDevice};
use self::sound_effects::{NotificationEvent, SoundEffects, SoundEffectId};
/// The sample rate used internally.
const SAMPLE_RATE: u32 = 48000;
/// Input audio state. Input audio is picket up from an [AudioInputDevice] (e.g.
/// a microphone) and sent over the network.
pub struct AudioInput {
device: DefaultAudioInputDevice,
/// Outgoing voice packets that should be sent over the network.
channel_receiver:
Arc<tokio::sync::Mutex<Box<dyn Stream<Item = VoicePacket<Serverbound>> + Unpin>>>,
}
impl AudioInput {
pub fn new(
input_volume: f32,
phase_watcher: watch::Receiver<StatePhase>,
) -> Result<Self, AudioError> {
let mut default = DefaultAudioInputDevice::new(input_volume, phase_watcher, 4)?;
let opus_stream = default
.sample_receiver()
.unwrap()
.enumerate()
.map(|(i, e)| VoicePacket::Audio {
_dst: std::marker::PhantomData,
target: 0, // normal speech
session_id: (), // unused for server-bound packets
seq_num: i as u64,
payload: VoicePacketPayload::Opus(e.into(), false),
position_info: None,
});
default.play()?;
let res = Self {
device: default,
channel_receiver: Arc::new(tokio::sync::Mutex::new(Box::new(opus_stream))),
};
Ok(res)
}
pub fn receiver(
&self,
) -> Arc<tokio::sync::Mutex<Box<dyn Stream<Item = VoicePacket<Serverbound>> + Unpin>>> {
Arc::clone(&self.channel_receiver)
}
pub fn set_volume(&self, input_volume: f32) {
self.device.set_volume(input_volume);
}
}
impl Debug for AudioInput {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("AudioInput")
.field("device", &self.device)
.field("channel_receiver", &"receiver")
.finish()
}
}
#[derive(Debug)]
/// Audio output state. The audio is received from each client over the network,
/// decoded, merged and finally played to an [AudioOutputDevice] (e.g. speaker,
/// headphones, ...).
pub struct AudioOutput {
device: DefaultAudioOutputDevice,
/// The volume and mute-status of a user ID.
user_volumes: Arc<Mutex<HashMap<u32, (f32, bool)>>>,
/// The client stream per user ID. A separate stream is kept for UDP and TCP.
///
/// Shared with [DefaultAudioOutputDevice].
client_streams: Arc<Mutex<ClientStream>>,
/// Opened sound effects.
sound_effects: SoundEffects,
/// Which file should be played on specific events.
sound_effect_events: HashMap<NotificationEvent, SoundEffectId>,
}
impl AudioOutput {
pub fn new(output_volume: f32) -> Result<Self, AudioError> {
let user_volumes = Arc::new(std::sync::Mutex::new(HashMap::new()));
let default = DefaultAudioOutputDevice::new(output_volume, Arc::clone(&user_volumes))?;
default.play()?;
let client_streams = default.client_streams();
let mut res = Self {
device: default,
user_volumes,
client_streams,
sound_effects: SoundEffects::new(2),
sound_effect_events: HashMap::new(),
};
res.load_sound_effects(&[]);
Ok(res)
}
pub fn load_sound_effects(&mut self, sound_effects: &[SoundEffect]) {
todo!()
}
/// Decodes a voice packet.
pub fn decode_packet_payload(
&self,
stream_type: VoiceStreamType,
session_id: u32,
payload: VoicePacketPayload,
) {
self.client_streams
.lock()
.unwrap()
.decode_packet((stream_type, session_id), payload);
}
/// Sets the volume of the output device.
pub fn set_volume(&self, output_volume: f32) {
self.device.set_volume(output_volume);
}
/// Sets the incoming volume of a user.
pub fn set_user_volume(&self, id: u32, volume: f32) {
match self.user_volumes.lock().unwrap().entry(id) {
Entry::Occupied(mut entry) => {
entry.get_mut().0 = volume;
}
Entry::Vacant(entry) => {
entry.insert((volume, false));
}
}
}
/// Mutes another user.
pub fn set_mute(&self, id: u32, mute: bool) {
match self.user_volumes.lock().unwrap().entry(id) {
Entry::Occupied(mut entry) => {
entry.get_mut().1 = mute;
}
Entry::Vacant(entry) => {
entry.insert((1.0, mute));
}
}
}
/// Queues a sound effect.
pub fn play_effect(&self, effect: NotificationEvent) {
let id = self
.sound_effect_events
.get(&effect)
.cloned()
.unwrap_or_else(SoundEffects::default_sound_effect);
let samples = &self.sound_effects[id];
self.client_streams.lock().unwrap().add_sound_effect(samples);
}
}
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