speakerutils.java

纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统

package org.jnode.driver.sound.speaker;
import javax.naming.NameNotFoundException;

import org.apache.log4j.Logger;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceNotFoundException;
import org.jnode.naming.InitialNaming;

/** A static helper class for easy access to the system speaker.
 *  @author Matt Paine
 **/
public class SpeakerUtils
{

	/** My logger */
	private static final Logger log = Logger.getLogger(SpeakerUtils.class);
	/** What to play as the standard beep (null = a simple beep) **/
	public static Note[] stdBeep = null;

	/** The length of a standard interval **/
	public static final int INTERVAL = 500;

	/** A full length note **/
	public static final int FULL = INTERVAL;

	/** A half length note **/
	public static final int HALF = INTERVAL/2;

	/** A quarter length note **/
	public static final int QUART = INTERVAL/4;

	/** A three-quater length note **/
	public static final int THREEQUART = (int)(INTERVAL*0.75);

	/** Sounds a beep on the system speaker **/
	public static void beep()
	{
		if (stdBeep == null)
		{
			try
			{
				DeviceManager dm = (DeviceManager)InitialNaming.lookup(DeviceManager.NAME);
				Device dev = dm.getDevice("speaker0");
				SpeakerAPI s = (SpeakerAPI)dev.getAPI(SpeakerAPI.class);
				s.beep();
			}
			catch (ApiNotFoundException anfex)
			{
				log.error("Unable to beep: ", anfex);
			}
			catch (DeviceNotFoundException dnfex)
			{
				log.error("Unable to beep: ", dnfex);
			}
			catch (NameNotFoundException nnfex)
			{
				log.debug("Unable to beep: ", nnfex);
			}
		}
		else
			play (stdBeep);
	}

	/** Plays a series of notes through the default speaker **/
	public static void play(Note[] n)
	{
		try
		{
			DeviceManager dm = (DeviceManager)InitialNaming.lookup(DeviceManager.NAME);
			Device dev = dm.getDevice("speaker0");
			SpeakerAPI s = (SpeakerAPI)dev.getAPI(SpeakerAPI.class);
			s.playNote(n);
		}
		catch (ApiNotFoundException anfex)
		{
			log.error("Unable to beep: ", anfex);
		}
		catch (DeviceNotFoundException dnfex)
		{
			log.error("Unable to beep: ", dnfex);
		}
		catch (NameNotFoundException nnfex)
		{
			log.debug("Unable to beep: ", nnfex);
		}

	}

	/** Defines a scale **/
	public static final Note[] SCALE = new Note[] 
	{
		new Note (Note.NOTE_C4, HALF),
		new Note (Note.NOTE_D4, HALF),
		new Note (Note.NOTE_E4, HALF), 
		new Note (Note.NOTE_F4, HALF),
		new Note (Note.NOTE_G4, HALF), 
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_B4, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_D5, HALF),
		new Note (Note.NOTE_E5, HALF),
		new Note (Note.NOTE_F5, HALF),
		new Note (Note.NOTE_G5, HALF),
		new Note (Note.NOTE_A5, HALF),
		new Note (Note.NOTE_B5, HALF),
		new Note (Note.NOTE_C6, HALF)
	};

	/** Advance Australia Fair **/
	public static final Note[] AAF = new Note[]
	{
		new Note (Note.NOTE_G4, HALF),		// australians
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_G4, HALF),
		new Note (Note.NOTE_E4, HALF),
		new Note (Note.NOTE_G4, HALF),
		new Note (Note.NOTE_C5, THREEQUART),
		new Note (Note.NOTE_C5, QUART),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_E5, HALF),		// for
		new Note (Note.NOTE_D5, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_B4, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_D5, FULL+THREEQUART),
		new Note (Note.NOTE_G4, HALF),		// with
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_G4, HALF),
		new Note (Note.NOTE_E4, HALF),
		new Note (Note.NOTE_C4, HALF),
		new Note (Note.NOTE_G4, THREEQUART),
		new Note (Note.NOTE_G4, QUART),
		new Note (Note.NOTE_G4, HALF),
		new Note (Note.NOTE_E5, HALF),		// our home
		new Note (Note.NOTE_D5, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_B4, HALF),
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_G4, FULL+THREEQUART),
		new Note (Note.NOTE_G4, HALF),		// our lands
		new Note (Note.NOTE_A4, THREEQUART),
		new Note (Note.NOTE_B4, QUART),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_G4, THREEQUART),
		new Note (Note.NOTE_E4, QUART),
		new Note (Note.NOTE_E4, HALF),
		new Note (Note.NOTE_G4, HALF),		// of beuty
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_F5, HALF),
		new Note (Note.NOTE_E5, HALF),
		new Note (Note.NOTE_D5, FULL+THREEQUART),
		new Note (Note.NOTE_G4, HALF),		// in history
		new Note (Note.NOTE_A4, THREEQUART),
		new Note (Note.NOTE_B4, QUART),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_G4, THREEQUART),
		new Note (Note.NOTE_C5, QUART),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_D5, HALF),		// advance
		new Note (Note.NOTE_E5, THREEQUART),
		new Note (Note.NOTE_C5, QUART),
		new Note (Note.NOTE_D5, THREEQUART),
		new Note (Note.NOTE_B4, QUART),
		new Note (Note.NOTE_C5, FULL+THREEQUART),
		new Note (Note.NOTE_E5, HALF),		// in joyful
		new Note (Note.NOTE_F5, HALF),
		new Note (Note.NOTE_E5, HALF),
		new Note (Note.NOTE_D5, HALF),
		new Note (Note.NOTE_C5, HALF),
		new Note (Note.NOTE_B4, HALF),
		new Note (Note.NOTE_A4, HALF),
		new Note (Note.NOTE_G4, HALF),
		new Note (Note.NOTE_C5, HALF),		// advance
		new Note (Note.NOTE_E5, THREEQUART),
		new Note (Note.NOTE_C5, QUART),
		new Note (Note.NOTE_D5, THREEQUART),
		new Note (Note.NOTE_B4, QUART),
		new Note (Note.NOTE_C5, FULL+THREEQUART)
	};


}