Replace Javax Sound with direct alsa access

jni/nv_alsa/nv_alsa_jni.c

@@ -0,0 +1,36 @@
+#include "nv_alsa.h"
+
+#include <stdlib.h>
+#include <jni.h>
+
+// This function must be called before
+// any other decoding functions
+JNIEXPORT jint JNICALL
+Java_com_limelight_binding_audio_AlsaAudio_init(JNIEnv *env, jobject this, jint channelCount, jint sampleRate)
+{
+	return nv_alsa_init(channelCount, sampleRate);
+}
+
+JNIEXPORT void JNICALL
+Java_com_limelight_binding_audio_AlsaAudio_close(JNIEnv *env, jobject this)
+{
+	nv_alsa_close();
+}
+
+JNIEXPORT jint JNICALL
+Java_com_limelight_binding_audio_AlsaAudio_play(
+	JNIEnv *env, jobject this, // JNI parameters
+	jbyteArray indata, jint inoff, jint inlen)
+{
+	jint ret;
+	jbyte* jni_input_data;
+
+	jni_input_data = (*env)->GetByteArrayElements(env, indata, 0);
+
+	ret = nv_alsa_play(&jni_input_data[inoff], inlen);
+
+	// The input data isn't changed so it can be safely aborted
+	(*env)->ReleaseByteArrayElements(env, indata, jni_input_data, JNI_ABORT);
+	
+	return ret;
+}