feat: added audio type detector

um_wasm/src/exports/audio.rs

@@ -0,0 +1,31 @@
+use um_audio::{AudioError, AudioType};
+use wasm_bindgen::prelude::wasm_bindgen;
+use wasm_bindgen::JsError;
+
+/// Detected audio result
+#[wasm_bindgen(js_name=AudioTypeResult)]
+pub struct AudioTypeResult {
+    /// When this field is not zero, it means we need to feed this amount of bytes to the detector.
+    #[wasm_bindgen(js_name=needMore)]
+    pub need_more: usize,
+
+    /// Audio extension, without "."
+    /// When is unknown, it will return "bin".
+    #[wasm_bindgen(getter_with_clone,js_name=audioType)]
+    pub audio_type: String,
+}
+
+/// Detect audio type for given file header.
+/// Recommended a buffer of 1024 bytes.
+#[wasm_bindgen(js_name=detectAudioType)]
+pub fn detect_audio_type(buffer: &[u8]) -> Result<AudioTypeResult, JsError> {
+    let (need_more, audio_type) = match um_audio::detect_audio_type(buffer) {
+        Ok(t) => (0, t),
+        Err(AudioError::NeedMoreHeader(n)) => (n, AudioType::Unknown),
+        // Err(err) => Err(JsError::new(err.into()))?,
+    };
+    Ok(AudioTypeResult {
+        need_more,
+        audio_type: audio_type.to_string(),
+    })
+}

um_wasm/src/exports/mod.rs

@@ -1,3 +1,4 @@
+pub mod audio;
 pub mod kuwo;
 pub mod ncm;
 pub mod qmc;