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

dart-api-examples/non-streaming-asr/bin/vad-with-paraformer.dart

@@ -93,6 +93,28 @@ void main(List<String> arguments) async {
     }
   }
 
+  vad.flush();
+  while (!vad.isEmpty()) {
+    final stream = recognizer.createStream();
+    final segment = vad.front();
+    stream.acceptWaveform(
+        samples: segment.samples, sampleRate: waveData.sampleRate);
+    recognizer.decode(stream);
+
+    final result = recognizer.getResult(stream);
+
+    final startTime = segment.start * 1.0 / waveData.sampleRate;
+    final duration = segment.samples.length * 1.0 / waveData.sampleRate;
+    final stopTime = startTime + duration;
+    if (result.text != '') {
+      print(
+          '${startTime.toStringAsPrecision(4)} -- ${stopTime.toStringAsPrecision(4)}: ${result.text}');
+    }
+
+    stream.free();
+    vad.pop();
+  }
+
   vad.free();
   recognizer.free();
 }

dart-api-examples/non-streaming-asr/pubspec.yaml

@@ -10,7 +10,7 @@ environment:
 
 # Add regular dependencies here.
 dependencies:
-  sherpa_onnx: ^1.10.11
+  sherpa_onnx: ^1.10.12
   path: ^1.9.0
   args: ^2.5.0
 

dart-api-examples/streaming-asr/pubspec.yaml

@@ -11,7 +11,7 @@ environment:
 
 # Add regular dependencies here.
 dependencies:
-  sherpa_onnx: ^1.10.11
+  sherpa_onnx: ^1.10.12
   path: ^1.9.0
   args: ^2.5.0
 

dart-api-examples/tts/pubspec.yaml

@@ -8,7 +8,7 @@ environment:
 
 # Add regular dependencies here.
 dependencies:
-  sherpa_onnx: ^1.10.11
+  sherpa_onnx: ^1.10.12
   path: ^1.9.0
   args: ^2.5.0
 

dart-api-examples/vad/bin/vad.dart

@@ -65,6 +65,12 @@ void main(List<String> arguments) async {
     }
   }
 
+  vad.flush();
+  while (!vad.isEmpty()) {
+    allSamples.add(vad.front().samples);
+    vad.pop();
+  }
+
   vad.free();
 
   final s = Float32List.fromList(allSamples.expand((x) => x).toList());

dart-api-examples/vad/pubspec.yaml

@@ -9,7 +9,7 @@ environment:
   sdk: ^3.4.0
 
 dependencies:
-  sherpa_onnx: ^1.10.11
+  sherpa_onnx: ^1.10.12
   path: ^1.9.0
   args: ^2.5.0