encoder.java

Myjxta的源代码 基于JXTA的P2P即时通信系统

/*
 * Created on Oct 18, 2004
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package net.jxta.myjxta.plugins.vojxta;

import org.xiph.speex.SpeexEncoder;
import org.xiph.speex.spi.SpeexEncoding;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Ravi
 * @author jamoore
 * @modified 2005-03-14 jamoore inject quality into contructor/quality look up table
 * @modified 2005-03-14 jamoore remove AudioResource interface
 *
 */
public final class Encoder {

    static final Logger LOG = Logger.getLogger (Encoder.class.getName());
    
    private final SpeexEncoder encoder;
    
	/**
	 *  quality arg makes this encoder dynamic
	 */
	public Encoder(int quality) {
        
		super();
        
        LOG.setLevel(Level.INFO);
        int speexQuality = getSpeexQuality(quality);
        LOG.info("SPEEXquality " + speexQuality);
        encoder = new SpeexEncoder();

        encoder.init(AudioResource.MODE, speexQuality, AudioResource.SAMPLE_RATE, AudioResource.CHANNELS);
	}
	
    protected int getSpeexQuality(int quality) {
        
        int speexQuality = SpeexEncoding.SPEEX_Q0.getQuality ();
        
        switch(quality) {
            case 0 : speexQuality = SpeexEncoding.SPEEX_Q0.getQuality (); break;
            case 1 : speexQuality = SpeexEncoding.SPEEX_Q1.getQuality ();break;
            case 2 : speexQuality = SpeexEncoding.SPEEX_Q2.getQuality ();break;
            case 3 : speexQuality = SpeexEncoding.SPEEX_Q3.getQuality ();break;
            case 4 : speexQuality = SpeexEncoding.SPEEX_Q4.getQuality ();break;
            case 5 : speexQuality = SpeexEncoding.SPEEX_Q5.getQuality ();break;
            case 6 : speexQuality = SpeexEncoding.SPEEX_Q6.getQuality ();break;
            case 7 : speexQuality = SpeexEncoding.SPEEX_Q7.getQuality ();break;
            case 8 : speexQuality = SpeexEncoding.SPEEX_Q8.getQuality ();break;
            case 9 : speexQuality = SpeexEncoding.SPEEX_Q9.getQuality ();break;
            case 10 : speexQuality = SpeexEncoding.SPEEX_Q10.getQuality ();break;
        }
        
        return speexQuality;
    }
    
	/**
	 * 
	 * @param buf
	 * @return speex encode byte array
	 */
	public byte[] encode(byte[] buf) {
        
		encoder.processData(buf, 0, AudioResource.BLOCK_SIZE);
        
		byte[] encoded = new byte[encoder.getProcessedDataByteSize()];
        
		encoder.getProcessedData(encoded, 0);
        
		return encoded;
	}
	
	public static void main(String[] args) {
	}
	
	
}