com.mpatric.mp3agic.AbstractID3v2FrameData Maven / Gradle / Ivy

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A java library for reading mp3 files and manipulating mp3 file ID3 tags (ID3v1 and ID3v2.2 to ID3v2.4).

There is a newer version: 0.9.1

package com.mpatric.mp3agic;

public abstract class AbstractID3v2FrameData {
	
	boolean unsynchronisation;
	
	public AbstractID3v2FrameData(boolean unsynchronisation) {
		this.unsynchronisation = unsynchronisation;
	}
	
	protected void synchroniseAndUnpackFrameData(byte[] bytes) throws InvalidDataException {
		if (unsynchronisation && BufferTools.sizeSynchronisationWouldSubtract(bytes) > 0) {
			byte[] synchronisedBytes = BufferTools.synchroniseBuffer(bytes);
			unpackFrameData(synchronisedBytes);
		} else {
			unpackFrameData(bytes);
		}
	}
	
	protected byte[] packAndUnsynchroniseFrameData() {
		byte[] bytes = packFrameData();
		if (unsynchronisation && BufferTools.sizeUnsynchronisationWouldAdd(bytes) > 0) {
			return BufferTools.unsynchroniseBuffer(bytes);
		}
		return bytes;
	}
	
	protected byte[] toBytes() {
		return packAndUnsynchroniseFrameData();
	}
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + (unsynchronisation ? 1231 : 1237);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		AbstractID3v2FrameData other = (AbstractID3v2FrameData) obj;
		if (unsynchronisation != other.unsynchronisation)
			return false;
		return true;
	}

	protected abstract void unpackFrameData(byte[] bytes) throws InvalidDataException;
	protected abstract byte[] packFrameData();
	protected abstract int getLength();
}