Initialize project and implement decentralized voice chat client (PipeWire, Opus, Iroh, Iced)

src/audio/mod.rs

@@ -0,0 +1,31 @@
+use std::sync::mpsc::{Sender, Receiver};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum AudioError {
+    #[error("Failed to initialize audio backend: {0}")]
+    Init(String),
+    #[error("Audio device error: {0}")]
+    Device(String),
+    #[error("Stream error: {0}")]
+    Stream(String),
+    #[error("Audio buffer overflow/underflow")]
+    BufferError,
+    #[error("Other audio error: {0}")]
+    Other(String),
+}
+
+pub trait AudioBackend: Send + Sync {
+    /// Starts capturing raw PCM audio from the input device (microphone),
+    /// sending chunks of samples (e.g. `Vec<i16>`) to the provided Sender.
+    fn start_capture(&self, tx: Sender<Vec<i16>>) -> Result<(), AudioError>;
+
+    /// Starts playing back raw PCM audio to the output device (speaker),
+    /// reading mixed/incoming chunks of samples from the provided Receiver.
+    fn start_playback(&self, rx: Receiver<Vec<i16>>) -> Result<(), AudioError>;
+
+    /// Stops both capture and playback streams.
+    fn stop(&self) -> Result<(), AudioError>;
+}
+
+pub mod pipewire_impl;