/*
* Copyright 2002-2012 Drew Noakes
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* More information about this project is available at:
*
* http://drewnoakes.com/code/exif/
* http://code.google.com/p/metadata-extractor/
*/
package com.drew.imaging.tiff;
import com.drew.lang.ByteArrayReader;
import com.drew.lang.RandomAccessFileReader;
import com.drew.lang.annotations.NotNull;
import com.drew.metadata.Metadata;
import com.drew.metadata.exif.ExifReader;
import java.io.*;
/**
* Obtains all available metadata from TIFF formatted files. Note that TIFF files include many digital camera RAW
* formats, including Canon (CRW, CR2) and Nikon (NEF).
*
* @author Darren Salomons, Drew Noakes http://drewnoakes.com
*/
public class TiffMetadataReader
{
@NotNull
public static Metadata readMetadata(@NotNull File file) throws IOException
{
Metadata metadata = new Metadata();
RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
try {
new ExifReader().extractTiff(new RandomAccessFileReader(randomAccessFile), metadata);
} finally {
randomAccessFile.close();
}
return metadata;
}
@Deprecated
@NotNull
public static Metadata readMetadata(@NotNull InputStream inputStream, boolean waitForBytes) throws IOException
{
// NOTE this method is very inefficient, as it attempts to read the entire TIFF file into a byte[]
// TIFF processing requires random access, as directories can be scattered throughout the byte sequence.
// InputStream does not support seeking backwards, and so is not a viable option for TIFF processing
ByteArrayOutputStream out = new ByteArrayOutputStream();
int b;
// TODO do this in chunks rather than byte-by-byte, and honour 'waitForBytes'
while((b = inputStream.read()) != -1) {
out.write(b);
}
Metadata metadata = new Metadata();
new ExifReader().extractTiff(new ByteArrayReader(out.toByteArray()), metadata);
return metadata;
}
}