audioformatcomparator.java

来自「FMJ（freedom media for java)是java视频开发的新选择」· Java 代码 · 共 53 行

package net.sf.fmj.media.protocol.javasound;

import java.util.Comparator;

import javax.media.format.AudioFormat;

/**
 * Used to sort audio formats by quality
 * @author Ken Larson
 *
 */
public class AudioFormatComparator implements Comparator
{

	public int compare(Object a, Object b)
	{
		// null-safety: not strictly necessary, but defensive:
		if (a == null && b == null)
			return 0;
		if (a == null)	// then a < b, return -1
			return -1;
		if (b == null)
			return 1;	// a > b
		
		final AudioFormat aCast = (AudioFormat) a;
		final AudioFormat bCast = (AudioFormat) b;
		
		if (aCast.getSampleRate() > bCast.getSampleRate())
			return 1;
		else if (aCast.getSampleRate() < bCast.getSampleRate())
			return -1;
		
		if (aCast.getChannels() > bCast.getChannels())
			return 1;
		else if (aCast.getChannels() < bCast.getChannels())
			return -1;
			
		if (aCast.getSampleSizeInBits() > bCast.getSampleSizeInBits())
			return 1;
		else if (aCast.getSampleSizeInBits() < bCast.getSampleSizeInBits())
			return -1;
		
		// endian and signed do not affect quality, don't bother to compare.
		
		return 0;
				
				
		
		
	}

}