feat(sherpaonnx): surface model quality tier from the registry

src/sherpaonnx_engine.rs

@@ -277,6 +277,11 @@ fn parse_model(id: &str, val: &serde_json::Value) -> Option<SherpaModelInfo> {
             .get("num_speakers")
             .and_then(serde_json::Value::as_u64)
             .unwrap_or(1) as u32,
+        quality: obj
+            .get("quality")
+            .and_then(serde_json::Value::as_str)
+            .unwrap_or("")
+            .to_string(),
         url: obj
             .get("url")
             .and_then(|v| v.as_str())
@@ -1652,6 +1657,7 @@ mod tests {
             ],
             sample_rate: 24000,
             num_speakers: 2,
+            quality: String::new(),
             url: String::new(),
             compression: false,
             filesize_mb: 0.0,
@@ -1947,6 +1953,22 @@ mod tests {
         assert!(model.license_url.is_empty());
     }
 
+    #[test]
+    fn test_parse_model_surfaces_quality() {
+        let json = serde_json::json!({
+            "name": "test", "url": "https://example.com", "quality": "high"
+        });
+        let model = parse_model("test-quality", &json).unwrap();
+        assert_eq!(model.quality, "high");
+    }
+
+    #[test]
+    fn test_parse_model_quality_defaults_empty() {
+        let json = serde_json::json!({ "name": "test", "url": "https://example.com" });
+        let model = parse_model("test-noquality", &json).unwrap();
+        assert!(model.quality.is_empty());
+    }
+
     #[test]
     fn test_engine_speak_with_unknown_model_id_errors_with_count() {
         let engine = SherpaOnnxEngine::new(r#"{"modelId":"not-a-real-model"}"#);

src/types.rs

@@ -270,6 +270,10 @@ pub struct SherpaModelInfo {
     pub sample_rate: u32,
     /// Number of speakers (for multi-speaker models).
     pub num_speakers: u32,
+    /// Quality/variant tier from the registry (e.g. `"x_low"`, `"low"`,
+    /// `"medium"`, `"high"`; some entries carry variant markers like
+    /// `"int8"` or `"fp16"` instead). Empty when the entry omits it.
+    pub quality: String,
     /// Download URL for the model archive.
     pub url: String,
     /// Whether the archive is compressed.