Add Flush to VAD so that the last segment can be detected. (#1099)

scripts/node-addon-api/lib/vad.js

@@ -29,7 +29,7 @@ class CircularBuffer {
   }
 
   reset() {
-    return addon.circularBufferReset(this.handle);
+    addon.circularBufferReset(this.handle);
   }
 }
 
@@ -79,7 +79,11 @@ config = {
   }
 
   reset() {
-    return addon.VoiceActivityDetectorResetWrapper(this.handle);
+    addon.VoiceActivityDetectorResetWrapper(this.handle);
+  }
+
+  flush() {
+    addon.VoiceActivityDetectorFlushWrapper(this.handle);
   }
 }
 

scripts/node-addon-api/src/vad.cc

@@ -590,6 +590,31 @@ static void VoiceActivityDetectorResetWrapper(const Napi::CallbackInfo &info) {
   SherpaOnnxVoiceActivityDetectorReset(vad);
 }
 
+static void VoiceActivityDetectorFlushWrapper(const Napi::CallbackInfo &info) {
+  Napi::Env env = info.Env();
+
+  if (info.Length() != 1) {
+    std::ostringstream os;
+    os << "Expect only 1 argument. Given: " << info.Length();
+
+    Napi::TypeError::New(env, os.str()).ThrowAsJavaScriptException();
+
+    return;
+  }
+
+  if (!info[0].IsExternal()) {
+    Napi::TypeError::New(env, "Argument 0 should be a VAD pointer.")
+        .ThrowAsJavaScriptException();
+
+    return;
+  }
+
+  SherpaOnnxVoiceActivityDetector *vad =
+      info[0].As<Napi::External<SherpaOnnxVoiceActivityDetector>>().Data();
+
+  SherpaOnnxVoiceActivityDetectorFlush(vad);
+}
+
 void InitVad(Napi::Env env, Napi::Object exports) {
   exports.Set(Napi::String::New(env, "createCircularBuffer"),
               Napi::Function::New(env, CreateCircularBufferWrapper));
@@ -636,4 +661,7 @@ void InitVad(Napi::Env env, Napi::Object exports) {
 
   exports.Set(Napi::String::New(env, "voiceActivityDetectorReset"),
               Napi::Function::New(env, VoiceActivityDetectorResetWrapper));
+
+  exports.Set(Napi::String::New(env, "voiceActivityDetectorFlush"),
+              Napi::Function::New(env, VoiceActivityDetectorFlushWrapper));
 }