org.monte.media.tiff.IFDEntry Maven / Gradle / Ivy
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package org.monte.media.tiff;
import java.io.IOException;
import java.nio.ByteOrder;
public class IFDEntry {
private int tagNumber;
private int typeNumber;
private long count;
private long valueOffset;
private long entryOffset;
private long ifdOffset;
private Object data;
public IFDEntry(int tagNumber, int typeNumber, long count, long valueOffset, long entryOffset) {
this.tagNumber = tagNumber;
this.typeNumber = typeNumber;
this.count = count;
this.valueOffset = valueOffset;
this.entryOffset = entryOffset;
}
public long getCount() {
return count;
}
public int getTagNumber() {
return tagNumber;
}
public int getTypeNumber() {
return typeNumber;
}
public long getValueOffset() {
return valueOffset;
}
public long getDataOffset() {
return isDataInValueOffset() ? entryOffset + 8 : valueOffset+ifdOffset;
}
public void setIFDOffset(long newValue) {
ifdOffset = newValue;
}
public long getEntryOffset() {
return entryOffset;
}
public long getIFDOffset() {
return ifdOffset;
}
public boolean isDataInValueOffset() {
switch (IFDDataType.valueOf(typeNumber)) {
case ASCII:
return false;
case BYTE:
return count <= 4;
case SHORT:
return count <= 2;
case LONG:
return count <= 1;
case RATIONAL:
return false;
case SBYTE:
return count <= 4;
case UNDEFINED:
return count <= 4;
case SSHORT:
return count <= 2;
case SLONG:
return count <= 1;
case SRATIONAL:
return false;
case FLOAT:
return count <= 1;
case DOUBLE:
return false;
default:
return true;
}
}
public long getLength() {
switch (IFDDataType.valueOf(typeNumber)) {
case ASCII:
return count;
case BYTE:
return count;
case SHORT:
return count * 2;
case LONG:
return count * 4;
case RATIONAL:
return count * 8;
case SBYTE:
return count;
case UNDEFINED:
return count;
case SSHORT:
return count * 2;
case SLONG:
return count * 4;
case SRATIONAL:
return count * 8;
case FLOAT:
return count * 4;
case DOUBLE:
return count * 8;
default:
return 0;
}
}
public Object readData(TIFFInputStream in) throws IOException {
return readData(in, ifdOffset);
}
public Object readData(TIFFInputStream in, long ifdDataOffset) throws IOException {
Object d = null;
IFDDataType tt = IFDDataType.valueOf(typeNumber);
if (tt != null) {
switch (tt) {
case ASCII:
if (count <= 4) {
StringBuilder buf = new StringBuilder();
int data = (int) valueOffset;
if (in.getByteOrder() == ByteOrder.LITTLE_ENDIAN) {
for (int i = 0; i < count - 1; i++) {
buf.append((char) (data & 0xff));
data >>= 8;
}
} else {
for (int i = 0; i < count - 1; i++) {
buf.append((char) (data >>> 24));
data <<= 8;
}
}
return buf.toString();
} else {
return in.readASCII(valueOffset + ifdDataOffset, count);
}
case SHORT:
if (count == 1) {
if (in.getByteOrder() == ByteOrder.LITTLE_ENDIAN) {
d = (int) (valueOffset & 0xffff);
} else {
d = (int) ((valueOffset >> 16) & 0xffff);
}
} else if (count == 2) {
d = new int[]{(int) (valueOffset & 0xffff), (int) ((valueOffset & 0xffff0000) >> 16)};
} else {
d = in.readSHORT(valueOffset + ifdDataOffset, count);
}
break;
case LONG:
if (count == 1) {
d = valueOffset;
} else {
d = in.readLONG(valueOffset + ifdDataOffset, count);
}
break;
case RATIONAL:
if (count == 1) {
d = in.readRATIONAL(valueOffset + ifdDataOffset);
} else {
d = in.readRATIONAL(valueOffset + ifdDataOffset, count);
}
break;
case BYTE:
if (count == 1) {
d = (short) (valueOffset & 0xff);
} else if (count == 2) {
d = new short[]{(short) ((valueOffset & 0xff00) >> 8), (short) (valueOffset & 0xff)};
} else if (count == 3) {
d = new short[]{(short) ((valueOffset & 0xff0000) >> 16), (short) ((valueOffset & 0xff00) >> 8), (short) (valueOffset & 0xff)};
} else if (count == 4) {
d = new short[]{(short) ((valueOffset & 0xff000000) >> 24), (short) ((valueOffset & 0xff0000) >> 16), (short) ((valueOffset & 0xff00) >> 8), (short) (valueOffset & 0xff)};
} else {
byte[] b = new byte[(int) count];
in.read(valueOffset + ifdDataOffset, b, 0, b.length);
short[] s = new short[(int) count];
for (int i = 0; i < b.length; i++) {
s[i] = (short) (b[i] & 0xff);
}
d = s;
}
break;
case SBYTE:
case UNDEFINED:
if (count == 1) {
d = (byte) valueOffset;
} else if (count == 2) {
d = new byte[]{(byte) ((valueOffset & 0xff00) >> 8), (byte) (valueOffset & 0xff)};
} else if (count == 3) {
d = new byte[]{(byte) ((valueOffset & 0xff0000) >> 16), (byte) ((valueOffset & 0xff00) >> 8), (byte) (valueOffset & 0xff)};
} else if (count == 4) {
d = new byte[]{(byte) ((valueOffset & 0xff000000) >> 24), (byte) ((valueOffset & 0xff0000) >> 16), (byte) ((valueOffset & 0xff00) >> 8), (byte) (valueOffset & 0xff)};
} else {
byte[] b = new byte[(int) count];
in.read(valueOffset + ifdDataOffset, b, 0, b.length);
d = b;
}
break;
case SSHORT:
if (count == 1) {
if (in.getByteOrder() == ByteOrder.LITTLE_ENDIAN) {
d = (short) (valueOffset & 0xffff);
} else {
d = (short) ((valueOffset >> 16) & 0xffff);
}
} else if (count == 2) {
d = new int[]{(short) (valueOffset & 0xffff), (short) ((valueOffset & 0xffff0000) >> 16)};
} else {
d = in.readSSHORT(valueOffset + ifdDataOffset, count);
}
break;
case SLONG:
throw new IOException("Format " + typeNumber + " not implemented");
case SRATIONAL:
if (count == 1) {
d = in.readSRATIONAL(valueOffset + ifdDataOffset);
} else {
d = in.readSRATIONAL(valueOffset + ifdDataOffset, count);
}
break;
case FLOAT:
case DOUBLE:
default:
throw new IOException("Format " + typeNumber + " not implemented");
}
}
return d;
}
public void loadData(TIFFInputStream in) throws IOException {
data = readData(in);
}
public Object getData() {
return data;
}
@Override
public String toString() {
return "IFD Entry: tag:0x" + Integer.toHexString(tagNumber) + " type:0x" + Integer.toHexString(typeNumber) + " count:0x" + Long.toHexString(count) + " valueOffset:0x" + Long.toHexString(valueOffset);
}
public String toString(Enum tagName) {
StringBuilder buf = new StringBuilder();
buf.append(
"Entry tag:" + tagName + "(" + Integer.toHexString(tagNumber) + "), type:" + IFDDataType.valueOf(typeNumber) + "(" + typeNumber + "), count:" + count + ", valueOffset:" + valueOffset);
if (data != null) {
buf.append(", data:");
if (data instanceof byte[]) {
byte[] d = (byte[]) data;
for (int i = 0; i < d.length; i++) {
if (i != 0) {
buf.append(',');
}
buf.append(d[i]);
}
} else if (data instanceof short[]) {
short[] d = (short[]) data;
for (int i = 0; i < d.length; i++) {
if (i != 0) {
buf.append(',');
}
buf.append(d[i]);
}
} else if (data instanceof int[]) {
int[] d = (int[]) data;
for (int i = 0; i < d.length; i++) {
if (i != 0) {
buf.append(',');
}
buf.append(d[i]);
}
} else if (data instanceof long[]) {
long[] d = (long[]) data;
for (int i = 0; i < d.length; i++) {
if (i != 0) {
buf.append(',');
}
buf.append(d[i]);
}
} else if (data instanceof Object[]) {
Object[] d = (Object[]) data;
for (int i = 0; i < d.length; i++) {
if (i != 0) {
buf.append(',');
}
buf.append(d[i]);
}
} else {
buf.append(data);
}
}
return buf.toString();
}
}
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