cancel playback functionality, on write event

test/rwSwitchStream.js

@@ -21,6 +21,10 @@ emitter.on("data", (int16Arr) => {
     }
 });
 
+emitter.on("write", () => {
+    console.log("Writing frames");
+});
+
 const setStreams = () => {
 
     const defaultInput = nodeAudio.core.GetDefaultInputDevice();
@@ -48,6 +52,18 @@ const stopRecording = () => {
     /* Play recorded audio */
     console.log("Playing recorded audio...");
     nodeAudio.core.WriteToOutputStream(pcmAudio.buffer);
+
+    /* Two writes test */
+    // setTimeout(() => {
+    //     console.log("Playing again...");
+    //     nodeAudio.core.WriteToOutputStream(pcmAudio.buffer);
+    // }, 2000);
+
+    /* Cancel mid-playback test */
+    setTimeout(() => {
+        console.log("Cancelling...");
+        nodeAudio.core.CancelPlayback();
+    }, 2000);
 }
 
 nodeAudio.core.Initialize(emitter.emit.bind(emitter));
@@ -69,4 +85,4 @@ stdin.on( 'data', function( key ) {
 setTimeout(() => {
     nodeAudio.core.Terminate();
     process.exit();
-}, 30000);
+}, 20000);