wavaudioformat.java

FMJ（freedom media for java)是java视频开发的新选择

package com.sun.media.format;

import java.util.Hashtable;

import javax.media.Format;
import javax.media.format.AudioFormat;

import net.sf.fmj.utility.FormatUtils;

/**
 * Coding complete.
 * @author Ken Larson
 *
 */
public class WavAudioFormat extends AudioFormat
{
	public static final int WAVE_FORMAT_PCM = 1;
	public static final int WAVE_FORMAT_ADPCM = 2;
	public static final int WAVE_FORMAT_ALAW = 6;
	public static final int WAVE_FORMAT_MULAW = 7;
	public static final int WAVE_FORMAT_OKI_ADPCM = 16;
	public static final int WAVE_FORMAT_DIGISTD = 21;
	public static final int WAVE_FORMAT_DIGIFIX = 22;
	public static final int WAVE_FORMAT_GSM610 = 49;
	public static final int WAVE_IBM_FORMAT_MULAW = 257;
	public static final int WAVE_IBM_FORMAT_ALAW = 258;
	public static final int WAVE_IBM_FORMAT_ADPCM = 259;
	public static final int WAVE_FORMAT_DVI_ADPCM = 17;
	public static final int WAVE_FORMAT_SX7383 = 7175;
	public static final int WAVE_FORMAT_DSPGROUP_TRUESPEECH = 34;
	public static final int WAVE_FORMAT_MSNAUDIO = 50;
	public static final int WAVE_FORMAT_MSG723 = 66;
	public static final int WAVE_FORMAT_MPEG_LAYER3 = 85;
	public static final int WAVE_FORMAT_VOXWARE_AC8 = 112;
	public static final int WAVE_FORMAT_VOXWARE_AC10 = 113;
	public static final int WAVE_FORMAT_VOXWARE_AC16 = 114;
	public static final int WAVE_FORMAT_VOXWARE_AC20 = 115;
	public static final int WAVE_FORMAT_VOXWARE_METAVOICE = 116;
	public static final int WAVE_FORMAT_VOXWARE_METASOUND = 117;
	public static final int WAVE_FORMAT_VOXWARE_RT29H = 118;
	public static final int WAVE_FORMAT_VOXWARE_VR12 = 119;
	public static final int WAVE_FORMAT_VOXWARE_VR18 = 120;
	public static final int WAVE_FORMAT_VOXWARE_TQ40 = 121;
	public static final int WAVE_FORMAT_VOXWARE_TQ60 = 129;
	public static final int WAVE_FORMAT_MSRT24 = 130;
	
	protected byte[] codecSpecificHeader;
	private int averageBytesPerSecond = NOT_SPECIFIED;
	
	public static final Hashtable formatMapper = new Hashtable();
	public static final Hashtable reverseFormatMapper = new Hashtable();
	
	public WavAudioFormat(String encoding)
	{
		super(encoding);
	}
	
	public WavAudioFormat(String encoding, double sampleRate, int sampleSizeInBits, int channels, int frameSizeInBits, int averageBytesPerSecond, byte[] codecSpecificHeader)
	{	
		// averageBytesPerSecond seems to be substituted for frameRate.
		super(encoding, sampleRate, sampleSizeInBits, channels, NOT_SPECIFIED, NOT_SPECIFIED,
				frameSizeInBits, averageBytesPerSecond /*frameRate*/, byteArray);	
		this.averageBytesPerSecond = averageBytesPerSecond;
		this.codecSpecificHeader = codecSpecificHeader;
	
	}
	
	public WavAudioFormat(String encoding, double sampleRate, int sampleSizeInBits, int channels, int frameSizeInBits, int averageBytesPerSecond, int endian, int signed, float frameRate, Class dataType, byte[] codecSpecificHeader)
	{
		// averageBytesPerSecond seems to be substituted for frameRate.
		super(encoding, sampleRate, sampleSizeInBits, channels, endian, signed,
				frameSizeInBits, averageBytesPerSecond /*frameRate*/, dataType);
		this.averageBytesPerSecond = averageBytesPerSecond;
		this.codecSpecificHeader = codecSpecificHeader;

	}


	
	public int getAverageBytesPerSecond()
	{	return averageBytesPerSecond;
	}
	public byte[] getCodecSpecificHeader()
	{	return codecSpecificHeader;
	}
	


	public boolean equals(Object format)
	{	
		if (!super.equals(format))
			return false;
		
		if (!(format instanceof WavAudioFormat))	
		{
			return false;
		}
		
		final WavAudioFormat oCast = (WavAudioFormat) format;
		return 
			this.averageBytesPerSecond == oCast.averageBytesPerSecond &&
			this.codecSpecificHeader == oCast.codecSpecificHeader;	// TODO: equals or ==
	}
	
	public boolean matches(Format format)
	{	
		if (!super.matches(format))
			return false;
		
		if (!(format instanceof WavAudioFormat))
			return true;
		
		final WavAudioFormat oCast = (WavAudioFormat) format;

		return 
			FormatUtils.matches(this.averageBytesPerSecond, oCast.averageBytesPerSecond) &&
			FormatUtils.matches(this.codecSpecificHeader, oCast.codecSpecificHeader);

	}
	
	public Format intersects(Format other)
	{	
		
		final Format result = super.intersects(other);

		if (other instanceof WavAudioFormat)
		{
			final WavAudioFormat resultCast = (WavAudioFormat) result;
			
			final WavAudioFormat oCast = (WavAudioFormat) other;
			if (getClass().isAssignableFrom(other.getClass()))
			{	
				// "other" was cloned.
				
				if (FormatUtils.specified(this.averageBytesPerSecond))
					resultCast.averageBytesPerSecond = this.averageBytesPerSecond;
				if (FormatUtils.specified(this.codecSpecificHeader))
					resultCast.codecSpecificHeader = this.codecSpecificHeader;
				
				
			}
			else if (other.getClass().isAssignableFrom(getClass()))
			{	// this was cloned
				
				if (!FormatUtils.specified(resultCast.averageBytesPerSecond))
					resultCast.averageBytesPerSecond = oCast.averageBytesPerSecond;
				if (!FormatUtils.specified(resultCast.codecSpecificHeader))
					resultCast.codecSpecificHeader = oCast.codecSpecificHeader;
				
			
			}
		}
		return result;
	}



	public Object clone()
	{
		return new WavAudioFormat(encoding, sampleRate, sampleSizeInBits,
				channels, frameSizeInBits, averageBytesPerSecond, endian, signed, (float) frameRate, dataType, codecSpecificHeader);

	}
	
	protected void copy(Format f)
	{	
		super.copy(f);
		final WavAudioFormat oCast = (WavAudioFormat) f;	// it has to be a WavAudioFormat, or ClassCastException will be thrown.
		this.averageBytesPerSecond = oCast.averageBytesPerSecond;
		this.codecSpecificHeader = oCast.codecSpecificHeader;
		

	}
	
	static
	{	
		// TODO: what are these used for?
		formatMapper.put(new Integer(1), "LINEAR");
		formatMapper.put(new Integer(2), "msadpcm");
		formatMapper.put(new Integer(6), "alaw");
		formatMapper.put(new Integer(7), "ULAW");
		formatMapper.put(new Integer(17), "ima4/ms");
		formatMapper.put(new Integer(34), "truespeech");
		formatMapper.put(new Integer(49), "gsm/ms");
		formatMapper.put(new Integer(50), "msnaudio");
		formatMapper.put(new Integer(85), "mpeglayer3");
		formatMapper.put(new Integer(112), "voxwareac8");
		formatMapper.put(new Integer(113), "voxwareac10");
		formatMapper.put(new Integer(114), "voxwareac16");
		formatMapper.put(new Integer(115), "voxwareac20");
		formatMapper.put(new Integer(116), "voxwaremetavoice");
		formatMapper.put(new Integer(117), "voxwaremetasound");
		formatMapper.put(new Integer(118), "voxwarert29h");
		formatMapper.put(new Integer(119), "voxwarevr12");
		formatMapper.put(new Integer(120), "voxwarevr18");
		formatMapper.put(new Integer(121), "voxwaretq40");
		formatMapper.put(new Integer(129), "voxwaretq60");
		formatMapper.put(new Integer(130), "msrt24");
		
		
		reverseFormatMapper.put("alaw", new Integer(6));
		reverseFormatMapper.put("gsm/ms", new Integer(49));
		reverseFormatMapper.put("ima4/ms", new Integer(17));
		reverseFormatMapper.put("linear", new Integer(1));
		reverseFormatMapper.put("mpeglayer3", new Integer(85));
		reverseFormatMapper.put("msadpcm", new Integer(2));
		reverseFormatMapper.put("msnaudio", new Integer(50));
		reverseFormatMapper.put("msrt24", new Integer(130));
		reverseFormatMapper.put("truespeech", new Integer(34));
		reverseFormatMapper.put("ulaw", new Integer(7));
		reverseFormatMapper.put("voxwareac10", new Integer(113));
		reverseFormatMapper.put("voxwareac16", new Integer(114));
		reverseFormatMapper.put("voxwareac20", new Integer(115));
		reverseFormatMapper.put("voxwareac8", new Integer(112));
		reverseFormatMapper.put("voxwaremetasound", new Integer(117));
		reverseFormatMapper.put("voxwaremetavoice", new Integer(116));
		reverseFormatMapper.put("voxwarert29h", new Integer(118));
		reverseFormatMapper.put("voxwaretq40", new Integer(121));
		reverseFormatMapper.put("voxwaretq60", new Integer(129));
		reverseFormatMapper.put("voxwarevr12", new Integer(119));
		reverseFormatMapper.put("voxwarevr18", new Integer(120));

	}

}