com.googlecode.mp4parser.FileDataSourceViaHeapImpl Maven / Gradle / Ivy
package com.googlecode.mp4parser;
import com.googlecode.mp4parser.util.Logger;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;
import static com.googlecode.mp4parser.util.CastUtils.l2i;
public class FileDataSourceViaHeapImpl implements DataSource {
private static Logger LOG = Logger.getLogger(FileDataSourceViaHeapImpl.class);
FileChannel fc;
String filename;
public FileDataSourceViaHeapImpl(File f) throws FileNotFoundException {
this.fc = new FileInputStream(f).getChannel();
this.filename = f.getName();
}
public FileDataSourceViaHeapImpl(String f) throws FileNotFoundException {
File file = new File(f);
this.fc = new FileInputStream(file).getChannel();
this.filename = file.getName();
}
public FileDataSourceViaHeapImpl(FileChannel fc) {
this.fc = fc;
this.filename = "unknown";
}
public FileDataSourceViaHeapImpl(FileChannel fc, String filename) {
this.fc = fc;
this.filename = filename;
}
public synchronized int read(ByteBuffer byteBuffer) throws IOException {
return fc.read(byteBuffer);
}
public synchronized long size() throws IOException {
return fc.size();
}
public synchronized long position() throws IOException {
return fc.position();
}
public synchronized void position(long nuPos) throws IOException {
fc.position(nuPos);
}
public synchronized long transferTo(long startPosition, long count, WritableByteChannel sink) throws IOException {
return fc.transferTo(startPosition, count, sink);
}
public synchronized ByteBuffer map(long startPosition, long size) throws IOException {
ByteBuffer bb = ByteBuffer.allocate(l2i(size));
fc.read(bb, startPosition);
return (ByteBuffer) bb.rewind();
}
public void close() throws IOException {
fc.close();
}
@Override
public String toString() {
return filename;
}
}