project restructure with Rust workspaces

crates/jarvis-core/src/stt.rs

@@ -0,0 +1,36 @@
+mod vosk;
+
+use crate::config;
+use once_cell::sync::OnceCell;
+
+use crate::config::structs::SpeechToTextEngine;
+
+static STT_TYPE: OnceCell<SpeechToTextEngine> = OnceCell::new();
+
+pub fn init() -> Result<(), ()> {
+    if !STT_TYPE.get().is_none() {
+        return Ok(());
+    } // already initialized
+
+    // set default stt type
+    // @TODO. Make it configurable?
+    STT_TYPE.set(config::DEFAULT_SPEECH_TO_TEXT_ENGINE).unwrap();
+
+    // load given recorder
+    match STT_TYPE.get().unwrap() {
+        SpeechToTextEngine::Vosk => {
+            // Init Vosk
+            info!("Initializing Vosk STT backend.");
+            vosk::init_vosk();
+            info!("STT backend initialized.");
+        }
+    }
+
+    Ok(())
+}
+
+pub fn recognize(data: &[i16], partial: bool) -> Option<String> {
+    match STT_TYPE.get().unwrap() {
+        SpeechToTextEngine::Vosk => vosk::recognize(data, partial),
+    }
+}