org.monte.media.iff.IFFParser Maven / Gradle / Ivy
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package org.monte.media.iff;
import org.monte.media.AbortException;
import org.monte.media.ParseException;
import java.io.*;
import java.util.Hashtable;
public class IFFParser
extends Object {
public final static int ID_FORM = 0x464f524d;
public final static int ID_CAT = 0x43415420;
public final static int ID_LIST = 0x4c495354;
public final static int ID_PROP = 0x50524f50;
public final static int ID_FILLER = 0x20202020;
public final static int[] RESERVED_IDs = {
0x4c495354, 0x464f524d, 0x50524f50, 0x43415420, 0x20202020,
0x4c495331, 0x4c495332, 0x4c495333, 0x4c495334, 0x4c495335, 0x4c495336, 0x4c495337, 0x4c495338, 0x4c495339,
0x464f5231, 0x464f5232, 0x464f5233, 0x464f5234, 0x464f5235, 0x464f5236, 0x464f5237, 0x464f5238, 0x464f5239,
0x43415431, 0x43415432, 0x43415433, 0x43415434, 0x43415435, 0x43415436, 0x43415437, 0x43415438, 0x43415439
};
private IFFVisitor visitor;
private Hashtable dataChunks;
private Hashtable propertyChunks;
private Hashtable collectionChunks;
private Hashtable groupChunks;
private MC68000InputStream in;
/* ---- constructors ---- */
public IFFParser() {
}
/* ---- accessor methods ---- */
/* ---- action methods ---- */
public void parse(InputStream in, IFFVisitor v)
throws ParseException, AbortException, IOException {
this.in = new MC68000InputStream(new BufferedInputStream(in));
visitor = v;
parseFile();
}
private void parseFile()
throws ParseException, AbortException, IOException {
int id = in.readLONG();
switch (id) {
case ID_FORM:
parseFORM(null);
break;
case ID_CAT:
parseCAT(null);
break;
case ID_LIST:
parseLIST(null);
break;
default:
throw new ParseException("IFF-85 files must start with 'FORM', 'CAT ', or 'LIST'. But not with: '" + idToString(id) + "'");
}
}
private void parseFORM(Hashtable props)
throws ParseException, AbortException, IOException {
long size = in.readULONG();
long scan = in.getScan();
int type = in.readLONG();
if (!isFormType(type)) {
throw new ParseException("Invalid Form Type: " + idToString(type));
}
IFFChunk propGroup = props == null ? null : (IFFChunk) props.get(new Integer(type));
IFFChunk chunk = new IFFChunk(type, ID_FORM, size, scan, propGroup);
if (isGroupChunk(chunk)) {
visitor.enterGroup(chunk);
}
long finish = scan + size;
try {
while (in.getScan() < finish) {
long idscan = in.getScan();
int id = in.readLONG();
switch (id) {
case ID_FORM:
parseFORM(props);
break;
case ID_CAT:
parseCAT(props);
break;
case ID_LIST:
parseLIST(props);
break;
default:
if (isLocalChunkID(id)) {
parseLocalChunk(chunk, id);
} else {
throw new ParseException("Invalid IFFChunk within FORM: " + idToString(id) + " at offset:" + idscan);
}
}
// System.out.println("Found IFFChunk within Form:" + idToString(id)+" at offset:"+idscan);
in.align();
}
} catch (EOFException e) {
System.err.println("Unexpected EOF after:" + (in.getScan() - scan) + " should be:" + size);
e.printStackTrace();
}
if (isGroupChunk(chunk)) {
visitor.leaveGroup(chunk);
}
}
private void parseCAT(Hashtable props)
throws ParseException, AbortException, IOException {
long size = in.readULONG();
long scan = in.getScan();
int type = in.readLONG();
if (!isContentType(type)) {
throw new ParseException("Invalid Content Type: " + idToString(type));
}
IFFChunk propGroup = props == null ? null : (IFFChunk) props.get(new Integer(type));
IFFChunk chunk = new IFFChunk(type, ID_CAT, size, scan, propGroup);
if (isGroupChunk(chunk)) {
visitor.enterGroup(chunk);
}
long finish = scan + size;
while (in.getScan() < finish) {
int id = in.readLONG();
switch (id) {
case ID_FORM:
parseFORM(props);
break;
case ID_CAT:
parseCAT(props);
break;
case ID_LIST:
parseLIST(props);
break;
default:
throw new ParseException("Invalid IFFChunk within CAT: " + idToString(id));
}
in.align();
}
if (isGroupChunk(chunk)) {
visitor.leaveGroup(chunk);
}
}
@SuppressWarnings("unchecked")
private void parseLIST(Hashtable props)
throws ParseException, AbortException, IOException {
long size = in.readULONG();
long scan = in.getScan();
int type = in.readLONG();
if (!isFormType(type)) {
throw new ParseException("Invalid Form Type: " + idToString(type));
}
IFFChunk propGroup = props == null ? null : (IFFChunk) props.get(new Integer(type));
IFFChunk chunk = new IFFChunk(type, ID_LIST, size, scan, propGroup);
if (isGroupChunk(chunk)) {
visitor.enterGroup(chunk);
}
props = new Hashtable();
long finish = scan + size;
while (in.getScan() < finish) {
int id = in.readLONG();
switch (id) {
case ID_FORM:
parseFORM(props);
break;
case ID_CAT:
parseCAT(props);
break;
case ID_LIST:
parseLIST(props);
break;
case ID_PROP:
IFFChunk prop = parsePROP();
props.put(new Integer(prop.getType()), prop);
break;
default:
if (isLocalChunkID(id)) {
parseLocalChunk(chunk, id);
} else {
throw new ParseException("Invalid IFFChunk ID within LIST: " + idToString(id));
}
}
in.align();
}
if (isGroupChunk(chunk)) {
visitor.leaveGroup(chunk);
}
}
private IFFChunk parsePROP()
throws ParseException, AbortException, IOException {
long size = in.readULONG();
long scan = in.getScan();
int type = in.readLONG();
if (!isFormType(type)) {
throw new ParseException("Invalid Form Type: " + idToString(type));
}
IFFChunk chunk = new IFFChunk(type, ID_PROP, size, scan);
if (isGroupChunk(chunk)) {
visitor.enterGroup(chunk);
}
long finish = scan + size;
while (in.getScan() < finish) {
int id = in.readLONG();
if (isLocalChunkID(id)) {
parseLocalChunk(chunk, id);
} else {
throw new ParseException("Invalid IFFChunk ID within PROP: " + idToString(id));
}
in.align();
}
if (isGroupChunk(chunk)) {
visitor.leaveGroup(chunk);
}
return chunk;
}
private void parseLocalChunk(IFFChunk parent, int id)
throws ParseException, AbortException, IOException {
long size = in.readULONG();
long scan = in.getScan();
IFFChunk chunk = new IFFChunk(parent.getType(), id, size, scan);
if (isDataChunk(chunk)) {
byte[] data = new byte[(int) size];
in.read(data, 0, (int) size);
chunk.setData(data);
visitor.visitChunk(parent, chunk);
} else if (isPropertyChunk(chunk)) {
byte[] data = new byte[(int) size];
in.read(data, 0, (int) size);
chunk.setData(data);
parent.putPropertyChunk(chunk);
} else if (isCollectionChunk(chunk)) {
byte[] data = new byte[(int) size];
in.read(data, 0, (int) size);
chunk.setData(data);
parent.addCollectionChunk(chunk);
} else {
if (size > 0) {
in.skipFully((int) size);
}
}
}
protected boolean isDataChunk(IFFChunk chunk) {
if (dataChunks == null) {
if (collectionChunks == null && propertyChunks == null) {
return true;
} else {
return false;
}
} else {
return dataChunks.containsKey(chunk);
}
}
protected boolean isGroupChunk(IFFChunk chunk) {
if (groupChunks == null) {
return true;
} else {
return groupChunks.containsKey(new Integer(chunk.getID()));
}
}
protected boolean isPropertyChunk(IFFChunk chunk) {
if (propertyChunks == null) {
return false;
} else {
return propertyChunks.containsKey(chunk);
}
}
protected boolean isCollectionChunk(IFFChunk chunk) {
if (collectionChunks == null) {
return false;
} else {
return collectionChunks.containsKey(chunk);
}
}
@SuppressWarnings("unchecked")
public void declareDataChunk(int type, int id) {
IFFChunk chunk = new IFFChunk(type, id);
if (dataChunks == null) {
dataChunks = new Hashtable();
}
dataChunks.put(chunk, chunk);
}
public void declareGroupChunk(int type, int id) {
IFFChunk chunk = new IFFChunk(type, id);
if (groupChunks == null) {
groupChunks = new Hashtable();
}
groupChunks.put(new Integer(id), chunk);
}
public void declarePropertyChunk(int type, int id) {
IFFChunk chunk = new IFFChunk(type, id);
if (propertyChunks == null) {
propertyChunks = new Hashtable();
}
propertyChunks.put(chunk, chunk);
}
public void declareCollectionChunk(int type, int id) {
IFFChunk chunk = new IFFChunk(type, id);
if (collectionChunks == null) {
collectionChunks = new Hashtable();
}
collectionChunks.put(chunk, chunk);
}
/* ---- Class methods ---- */
public static boolean isGroupID(int id) {
if (id == ID_FORM
|| id == ID_CAT
|| id == ID_LIST
|| id == ID_PROP) {
return true;
} else {
return false;
}
}
public static boolean isID(int id) {
int value1 = id >> 24;
int value2 = (id >> 16) & 0xff;
int value3 = (id >> 8) & 0xff;
int value4 = id & 0xff;
if (value1 < 0x20 || value1 > 0x7e
|| value2 < 0x20 || value2 > 0x7e
|| value3 < 0x20 || value3 > 0x7e
|| value4 < 0x20 || value4 > 0x7e) {
return false;
}
if (id != ID_FILLER && value1 == 0x20) {
return false;
}
return true;
}
public static boolean isLocalChunkID(int id) {
if (id == ID_FILLER) {
return false;
}
if (isGroupID(id)) {
return false;
}
return isID(id);
}
public static boolean isReservedID(int id) {
for (int i = 0; i < RESERVED_IDs.length; i++) {
if (id == RESERVED_IDs[i]) {
return true;
}
}
return false;
}
public static boolean isFormType(int id) {
if (isReservedID(id)) {
return false;
}
int value1 = id >> 24;
int value2 = (id >> 16) & 0xff;
int value3 = (id >> 8) & 0xff;
int value4 = id & 0xff;
if (value1 < 0x30 || value1 > 0x5a || (value1 > 0x49 && value1 < 0x41)
|| (value2 < 0x30 && value2 != 0x20) || value2 > 0x5a || (value2 > 0x49 && value2 < 0x41)
|| (value3 < 0x30 && value3 != 0x20) || value3 > 0x5a || (value3 > 0x49 && value3 < 0x41)
|| (value4 < 0x30 && value4 != 0x20) || value4 > 0x5a || (value4 > 0x49 && value4 < 0x41)) {
return false;
}
if (isGroupID(id)) {
return false;
}
return true;
}
public static boolean isContentType(int id) {
if (id == ID_FILLER) {
return true;
} else {
return isFormType(id);
}
}
public static String idToString(int anID) {
byte[] bytes = new byte[4];
bytes[0] = (byte) (anID >>> 24);
bytes[1] = (byte) (anID >>> 16);
bytes[2] = (byte) (anID >>> 8);
bytes[3] = (byte) (anID >>> 0);
return new String(bytes);
}
public static int stringToID(String aString) {
byte[] bytes = aString.getBytes();
return ((int) bytes[0]) << 24
| ((int) bytes[1]) << 16
| ((int) bytes[2]) << 8
| ((int) bytes[3]) << 0;
}
}
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