public class Const
{
	/**
	 * Size of a chunk of data (used to split the ExtendedXMP information into blocks
	 */
	public static final int CHUNKSIZE = 65400;
	
	/** Strings for JPEGUtils.decorate() */
	
	public static final String EXIF = "EXIF";
	public static final String STANDARDXMP = "StandardXMP";
	public static final String EXTENDEDXMP = "ExtendedXMP";
	
	/**
	 * Magical bytes that identify the file as JPG (FF D8) (length: 2)
	 */
	public static byte[] markJPG = {(byte) 0xFF, (byte) 0xD8};
	
	/**
	 * Marker that defines the beginning of a new block of metadata (FF E1) (length: 2)
	 */
	public static byte[] markAPP1 = {(byte) 0xFF, (byte) 0xE1};
	
	/**
	 * Header of the EXIF block (EXIF\0\0) (length: 6)
	 */
	public static byte[] markEXIF = {(byte) 0x45, (byte) 0x78, (byte) 0x69, (byte) 0x66, (byte) 0x00, (byte) 0x00};
	
	/**
	 * Header of the StandardXMP block (http://ns.adobe.com/xap/1.0/\0) (length: 29)
	 */
	public static byte[] markStandardXMP = {
		(byte) 0x68, (byte) 0x74, (byte) 0x74, (byte) 0x70,
		(byte) 0x3A, (byte) 0x2F, (byte) 0x2F, (byte) 0x6E, (byte) 0x73, 
		(byte) 0x2E, (byte) 0x61, (byte) 0x64, (byte) 0x6F, (byte) 0x62, 
		(byte) 0x65, (byte) 0x2E, (byte) 0x63, (byte) 0x6F, (byte) 0x6D, 
		(byte) 0x2F, (byte) 0x78, (byte) 0x61, (byte) 0x70, (byte) 0x2F, 
		(byte) 0x31, (byte) 0x2E, (byte) 0x30, (byte) 0x2F, (byte) 0x00};
	
	/**
	 * Header of the ExtendedXMP block (http://ns.adobe.com/xmp/extension/\0) (length: 35)
	 */
	public static byte[] markExtendedXMP = {
		(byte) 0x68, (byte) 0x74, (byte) 0x74, (byte) 0x70,
		(byte) 0x3A, (byte) 0x2F, (byte) 0x2F, (byte) 0x6E, (byte) 0x73,
		(byte) 0x2E, (byte) 0x61, (byte) 0x64, (byte) 0x6F, (byte) 0x62,
		(byte) 0x65, (byte) 0x2E, (byte) 0x63, (byte) 0x6F, (byte) 0x6D,
		(byte) 0x2F, (byte) 0x78, (byte) 0x6D, (byte) 0x70, (byte) 0x2F,
		(byte) 0x65, (byte) 0x78, (byte) 0x74, (byte) 0x65, (byte) 0x6e,
		(byte) 0x73, (byte) 0x69, (byte) 0x6f, (byte) 0x6e, (byte) 0x2f,
		(byte) 0x00};
	
	/** Keys (following scheme: key="value") */
	
	/**
	 * Key for the MD5 digest of the full ExtendedXMP block content (without headers etc.)
	 * (xmpNote:HasExtendedXMP) (length: 22)
	 */
	public static byte[] keyHasExtendedXMP = {
		(byte) 0x78,(byte) 0x6d,(byte) 0x70,(byte) 0x4e,(byte) 0x6f,
		(byte) 0x74,(byte) 0x65,(byte) 0x3a,(byte) 0x48,(byte) 0x61,
		(byte) 0x73,(byte) 0x45,(byte) 0x78,(byte) 0x74,(byte) 0x65,
		(byte) 0x6e,(byte) 0x64,(byte) 0x65,(byte) 0x64,(byte) 0x58,
		(byte) 0x4d,(byte) 0x50
	};
	
	/**
	 * Key for the Base64 encoded png image containing the depth information
	 * (GDepth:Data) (length: 11)
	 */
	public static byte[] keyGDepthData = {
		(byte) 0x47,(byte) 0x44,(byte) 0x65,(byte) 0x70,(byte) 0x74,
		(byte) 0x68,(byte) 0x3a,(byte) 0x44,(byte) 0x61,(byte) 0x74,
		(byte) 0x61
		};
	
	/**
	 * Key for the Base64 encoded unblurred jpg source image (Google camera will combine this with the depth information to render the blurred image)
	 * (GImage:Data) (length: 11)
	 */
	public static byte[] keyGImageData = {
		(byte) 0x47,(byte) 0x49,(byte) 0x6d,(byte) 0x61,(byte) 0x67,
		(byte) 0x65,(byte) 0x3a,(byte) 0x44,(byte) 0x61,(byte) 0x74,
		(byte) 0x61
		};
}