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Add a FSTDataProvider implementation using a WUDDataPartition.

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Maschell 2019-04-10 20:01:52 +02:00
parent 8e4faa58dc
commit 4d703d631a
1 changed files with 58 additions and 0 deletions
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src/de/mas/wiiu/jnus/implementations/FSTDataProviderWUDDataPartition.java Normal file
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package de.mas.wiiu.jnus.implementations;
import java.io.IOException;
import java.io.InputStream;
import java.util.Optional;
import de.mas.wiiu.jnus.entities.content.ContentFSTInfo;
import de.mas.wiiu.jnus.entities.fst.FSTEntry;
import de.mas.wiiu.jnus.implementations.wud.parser.WUDDataPartition;
import de.mas.wiiu.jnus.implementations.wud.reader.WUDDiscReader;
import de.mas.wiiu.jnus.interfaces.FSTDataProvider;
public class FSTDataProviderWUDDataPartition implements FSTDataProvider {
private final WUDDataPartition partition;
private final WUDDiscReader discReader;
private final byte[] titleKey;
public FSTDataProviderWUDDataPartition(WUDDataPartition partition, WUDDiscReader discReader, byte[] titleKey) {
this.partition = partition;
this.discReader = discReader;
this.titleKey = titleKey;
}
@Override
public String getName() {
return partition.getPartitionName();
}
@Override
public FSTEntry getRoot() {
return partition.getFST().getRoot();
}
@Override
public byte[] readFile(FSTEntry entry, long offset, long size) throws IOException {
ContentFSTInfo info = partition.getFST().getContentFSTInfos().get((int) entry.getContentFSTID());
return getChunkOfData(info.getOffset(), entry.getFileOffset() + offset, size, discReader, titleKey);
}
@Override
public InputStream readFileAsStream(FSTEntry entry, long offset, Optional<Long> size) throws IOException {
ContentFSTInfo info = partition.getFST().getContentFSTInfos().get((int) entry.getContentFSTID());
long fileSize = size.orElse(entry.getFileSize());
if (titleKey == null) {
return discReader.readEncryptedToInputStream(partition.getAbsolutePartitionOffset() + info.getOffset() + entry.getFileOffset() + offset, fileSize);
}
return discReader.readDecryptedToInputStream(partition.getAbsolutePartitionOffset() + info.getOffset(), entry.getFileOffset() + offset, fileSize,
titleKey, null, false);
}
public byte[] getChunkOfData(long contentOffset, long fileoffset, long size, WUDDiscReader discReader, byte[] titleKey) throws IOException {
if (titleKey == null) {
return discReader.readEncryptedToByteArray(partition.getAbsolutePartitionOffset() + contentOffset, fileoffset, (int) size);
}
return discReader.readDecryptedToByteArray(partition.getAbsolutePartitionOffset() + contentOffset, fileoffset, (int) size, titleKey, null, false);
}
}