PulseAudioLibrary.java

/*
  PulseAudioLibrary.java

  (c) 2010-2016 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package ejs.base.sound;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.ptr.IntByReference;

/**
 * Interface to PulseAudio APIs
 * @author ejs
 * @noimplement
 * @noextend
 */
public interface PulseAudioLibrary extends Library {
	public static class pa_sample_spec extends Structure {
		public int /*pa_sample_format_t*/ format;
		public int rate;
		public byte channels;
	}

	public static class pa_simple extends Structure {
		public Pointer mainloop;
		public Pointer context;
		public Pointer stream;
		public int direction;
		public Pointer data;
		public int read_index, read_length;
		public int operation_success;
	}

	public static class pa_channel_map extends Structure {
	}

	public static class pa_buffer_attr extends Structure {
	}

	PulseAudioLibrary INSTANCE = (PulseAudioLibrary) Native.synchronizedLibrary(
			(Library) Native.loadLibrary("pulse-simple",
					PulseAudioLibrary.class));
	
	public static final int PA_SAMPLE_U8 = 0;
	public static final int PA_SAMPLE_S16LE = 3;
	public static final int PA_SAMPLE_S16BE = 4;
	public static final int PA_SAMPLE_FLOAT32LE = 5;
	public static final int PA_STREAM_NODIRECTION = 0;
	public static final int PA_STREAM_PLAYBACK = 1;
	public static final int PA_STREAM_RECORD = 2;
	public static final int PA_STREAM_UPLOAD = 3;
	
	PulseAudioLibrary.pa_simple pa_simple_new(String server,
			String	name,
			int /*pa_stream_direction_t */ 	dir,
			String dev,
			String stream_name,
			PulseAudioLibrary.pa_sample_spec ss,
			PulseAudioLibrary.pa_channel_map map,
			PulseAudioLibrary.pa_buffer_attr attr,
			IntByReference  	error	 
		);
	
	int 	pa_simple_write (PulseAudioLibrary.pa_simple s, byte[] data, int bytes, IntByReference error);
	
	void pa_simple_free(PulseAudioLibrary.pa_simple simple);

	void pa_simple_drain(PulseAudioLibrary.pa_simple simple, IntByReference error);
	void pa_simple_flush(PulseAudioLibrary.pa_simple simple, IntByReference error);
	
	long pa_simple_get_latency	(pa_simple simple, IntByReference error);

	String pa_strerror(int error);
}