port audio engine to kotlin

module/audio/src/main/java/org/openbase/jul/audio/AudioData.kt

@@ -0,0 +1,15 @@
+package org.openbase.jul.audio
+
+import javax.sound.sampled.AudioFormat
+
+/**
+ *
+ * @author [Divine Threepwood](mailto:divine@openbase.org)
+ */
+interface AudioData : AudioSource {
+    val data: ByteArray
+
+    val format: AudioFormat
+
+    val dataLength: Long
+}

module/audio/src/main/java/org/openbase/jul/audio/AudioDataImpl.kt

@@ -0,0 +1,44 @@
+package org.openbase.jul.audio
+
+import org.openbase.jul.exception.CouldNotPerformException
+import java.io.File
+import javax.sound.sampled.AudioFormat
+import javax.sound.sampled.AudioSystem
+
+/**
+ *
+ * @author [Divine Threepwood](mailto:divine@openbase.org)
+ */
+class AudioDataImpl : AudioData {
+    override val data: ByteArray
+    override val format: AudioFormat
+    override val dataLength: Long
+
+    constructor(data: ByteArray, format: AudioFormat, dataLength: Long) {
+        this.data = data
+        this.format = format
+        this.dataLength = dataLength
+    }
+
+    constructor(soundFile: File) {
+        if (!soundFile.exists()) {
+            throw CouldNotPerformException("AudioFile is missing!")
+        }
+
+        AudioSystem.getAudioInputStream(soundFile).use { ais ->
+            this.dataLength = ais.frameLength
+            this.format = ais.format
+            this.data = ByteArray(ais.frameLength.toInt() * format.frameSize)
+            val buf = ByteArray(AudioPlayer.BUFSIZE)
+            var i = 0
+            while (i < data.size) {
+                var r = ais.read(buf, 0, AudioPlayer.BUFSIZE)
+                if (i + r >= data.size) {
+                    r = data.size - i
+                }
+                System.arraycopy(buf, 0, data, i, r)
+                i += AudioPlayer.BUFSIZE
+            }
+        }
+    }
+}

module/audio/src/main/java/org/openbase/jul/audio/AudioFileHolder.kt

@@ -0,0 +1,11 @@
+package org.openbase.jul.audio
+
+import java.io.File
+
+/**
+ *
+ * @author [Divine Threepwood](mailto:divine@openbase.org)
+ */
+interface AudioFileHolder : AudioSource {
+    val file: File
+}