Add Kotlin API for audio tagging (#770)

kotlin-api-examples/Main.kt

@@ -7,12 +7,56 @@ fun callback(samples: FloatArray): Unit {
 }
 
 fun main() {
+  testAudioTagging()
   testSpeakerRecognition()
   testTts()
   testAsr("transducer")
   testAsr("zipformer2-ctc")
 }
 
+fun testAudioTagging() {
+  val config = AudioTaggingConfig(
+      model=AudioTaggingModelConfig(
+        zipformer=OfflineZipformerAudioTaggingModelConfig(
+          model="./sherpa-onnx-zipformer-audio-tagging-2024-04-09/model.int8.onnx",
+        ),
+        numThreads=1,
+        debug=true,
+        provider="cpu",
+      ),
+      labels="./sherpa-onnx-zipformer-audio-tagging-2024-04-09/class_labels_indices.csv",
+      topK=5,
+   )
+  val tagger = AudioTagging(assetManager=null, config=config)
+
+  val testFiles = arrayOf(
+    "./sherpa-onnx-zipformer-audio-tagging-2024-04-09/test_wavs/1.wav",
+    "./sherpa-onnx-zipformer-audio-tagging-2024-04-09/test_wavs/2.wav",
+    "./sherpa-onnx-zipformer-audio-tagging-2024-04-09/test_wavs/3.wav",
+    "./sherpa-onnx-zipformer-audio-tagging-2024-04-09/test_wavs/4.wav",
+  )
+  println("----------")
+  for (waveFilename in testFiles) {
+    val stream = tagger.createStream()
+
+    val objArray = WaveReader.readWaveFromFile(
+        filename = waveFilename,
+    )
+    val samples: FloatArray = objArray[0] as FloatArray
+    val sampleRate: Int = objArray[1] as Int
+
+    stream.acceptWaveform(samples, sampleRate = sampleRate)
+    val events = tagger.compute(stream)
+    stream.release()
+
+    println(waveFilename)
+    println(events)
+    println("----------")
+  }
+
+  tagger.release()
+}
+
 fun computeEmbedding(extractor: SpeakerEmbeddingExtractor, filename: String): FloatArray {
     var objArray = WaveReader.readWaveFromFile(
         filename = filename,