com.drew.imaging.ImageMetadataReader Maven / Gradle / Ivy
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/*
* Copyright 2002-2016 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:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.imaging;
import com.drew.imaging.bmp.BmpMetadataReader;
import com.drew.imaging.gif.GifMetadataReader;
import com.drew.imaging.ico.IcoMetadataReader;
import com.drew.imaging.jpeg.JpegMetadataReader;
import com.drew.imaging.pcx.PcxMetadataReader;
import com.drew.imaging.png.PngMetadataReader;
import com.drew.imaging.psd.PsdMetadataReader;
import com.drew.imaging.raf.RafMetadataReader;
import com.drew.imaging.tiff.TiffMetadataReader;
import com.drew.imaging.webp.WebpMetadataReader;
import com.drew.lang.RandomAccessStreamReader;
import com.drew.lang.StringUtil;
import com.drew.lang.annotations.NotNull;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.MetadataException;
import com.drew.metadata.Tag;
import com.drew.metadata.exif.ExifIFD0Directory;
import com.drew.metadata.exif.ExifThumbnailDirectory;
import com.drew.metadata.file.FileMetadataReader;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
/**
* Reads metadata from any supported file format.
*
* This class a lightweight wrapper around other, specific metadata processors.
* During extraction, the file type is determined from the first few bytes of the file.
* Parsing is then delegated to one of:
*
*
* - {@link JpegMetadataReader} for JPEG files
* - {@link TiffMetadataReader} for TIFF and (most) RAW files
* - {@link PsdMetadataReader} for Photoshop files
* - {@link PngMetadataReader} for PNG files
* - {@link BmpMetadataReader} for BMP files
* - {@link GifMetadataReader} for GIF files
* - {@link IcoMetadataReader} for ICO files
* - {@link PcxMetadataReader} for PCX files
* - {@link WebpMetadataReader} for WebP files
* - {@link RafMetadataReader} for RAF files
*
*
* If you know the file type you're working with, you may use one of the above processors directly.
* For most scenarios it is simpler, more convenient and more robust to use this class.
*
* {@link FileTypeDetector} is used to determine the provided image's file type, and therefore
* the appropriate metadata reader to use.
*
* @author Drew Noakes https://drewnoakes.com
*/
public class ImageMetadataReader
{
/**
* Reads metadata from an {@link InputStream}.
*
* @param inputStream a stream from which the file data may be read. The stream must be positioned at the
* beginning of the file's data.
* @return a populated {@link Metadata} object containing directories of tags with values and any processing errors.
* @throws ImageProcessingException if the file type is unknown, or for general processing errors.
*/
@NotNull
public static Metadata readMetadata(@NotNull final InputStream inputStream) throws ImageProcessingException, IOException
{
return readMetadata(inputStream, -1);
}
/**
* Reads metadata from an {@link InputStream} of known length.
*
* @param inputStream a stream from which the file data may be read. The stream must be positioned at the
* beginning of the file's data.
* @param streamLength the length of the stream, if known, otherwise -1.
* @return a populated {@link Metadata} object containing directories of tags with values and any processing errors.
* @throws ImageProcessingException if the file type is unknown, or for general processing errors.
*/
@NotNull
public static Metadata readMetadata(@NotNull final InputStream inputStream, final long streamLength) throws ImageProcessingException, IOException
{
BufferedInputStream bufferedInputStream = inputStream instanceof BufferedInputStream
? (BufferedInputStream)inputStream
: new BufferedInputStream(inputStream);
FileType fileType = FileTypeDetector.detectFileType(bufferedInputStream);
if (fileType == FileType.Jpeg)
return JpegMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Tiff ||
fileType == FileType.Arw ||
fileType == FileType.Cr2 ||
fileType == FileType.Nef ||
fileType == FileType.Orf ||
fileType == FileType.Rw2)
return TiffMetadataReader.readMetadata(new RandomAccessStreamReader(bufferedInputStream, RandomAccessStreamReader.DEFAULT_CHUNK_LENGTH, streamLength));
if (fileType == FileType.Psd)
return PsdMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Png)
return PngMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Bmp)
return BmpMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Gif)
return GifMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Ico)
return IcoMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Pcx)
return PcxMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Riff)
return WebpMetadataReader.readMetadata(bufferedInputStream);
if (fileType == FileType.Raf)
return RafMetadataReader.readMetadata(bufferedInputStream);
throw new ImageProcessingException("File format is not supported");
}
/**
* Reads {@link Metadata} from a {@link File} object.
*
* @param file a file from which the image data may be read.
* @return a populated {@link Metadata} object containing directories of tags with values and any processing errors.
* @throws ImageProcessingException for general processing errors.
*/
@NotNull
public static Metadata readMetadata(@NotNull final File file) throws ImageProcessingException, IOException
{
InputStream inputStream = new FileInputStream(file);
Metadata metadata;
try {
metadata = readMetadata(inputStream, file.length());
} finally {
inputStream.close();
}
new FileMetadataReader().read(file, metadata);
return metadata;
}
private ImageMetadataReader() throws Exception
{
throw new Exception("Not intended for instantiation");
}
/**
* An application entry point. Takes the name of one or more files as arguments and prints the contents of all
* metadata directories to System.out.
*
* If -thumb is passed, then any thumbnail data will be written to a file with name of the
* input file having .thumb.jpg appended.
*
* If -markdown is passed, then output will be in markdown format.
*
* If -hex is passed, then the ID of each tag will be displayed in hexadecimal.
*
* @param args the command line arguments
*/
public static void main(@NotNull String[] args) throws MetadataException, IOException
{
Collection argList = new ArrayList(Arrays.asList(args));
boolean thumbRequested = argList.remove("-thumb");
boolean markdownFormat = argList.remove("-markdown");
boolean showHex = argList.remove("-hex");
if (argList.size() < 1) {
String version = ImageMetadataReader.class.getPackage().getImplementationVersion();
System.out.println("metadata-extractor version " + version);
System.out.println();
System.out.println(String.format("Usage: java -jar metadata-extractor-%s.jar [] [-thumb] [-markdown] [-hex]", version == null ? "a.b.c" : version));
System.exit(1);
}
for (String filePath : argList) {
long startTime = System.nanoTime();
File file = new File(filePath);
if (!markdownFormat && argList.size()>1)
System.out.printf("\n***** PROCESSING: %s\n%n", filePath);
Metadata metadata = null;
try {
metadata = ImageMetadataReader.readMetadata(file);
} catch (Exception e) {
e.printStackTrace(System.err);
System.exit(1);
}
long took = System.nanoTime() - startTime;
if (!markdownFormat)
System.out.printf("Processed %.3f MB file in %.2f ms%n%n", file.length() / (1024d * 1024), took / 1000000d);
if (markdownFormat) {
String fileName = file.getName();
String urlName = StringUtil.urlEncode(filePath);
ExifIFD0Directory exifIFD0Directory = metadata.getFirstDirectoryOfType(ExifIFD0Directory.class);
String make = exifIFD0Directory == null ? "" : exifIFD0Directory.getString(ExifIFD0Directory.TAG_MAKE);
String model = exifIFD0Directory == null ? "" : exifIFD0Directory.getString(ExifIFD0Directory.TAG_MODEL);
System.out.println();
System.out.println("---");
System.out.println();
System.out.printf("# %s - %s%n", make, model);
System.out.println();
System.out.printf("%n", urlName);
System.out.printf("![](\"https://raw.githubusercontent.com/drewnoakes/metadata-extractor-images/master/%s\")
%n", urlName);
System.out.println(fileName);
System.out.println("");
System.out.println();
System.out.println("Directory | Tag Id | Tag Name | Extracted Value");
System.out.println(":--------:|-------:|----------|----------------");
}
// iterate over the metadata and print to System.out
for (Directory directory : metadata.getDirectories()) {
String directoryName = directory.getName();
for (Tag tag : directory.getTags()) {
String tagName = tag.getTagName();
String description = tag.getDescription();
// truncate the description if it's too long
if (description != null && description.length() > 1024) {
description = description.substring(0, 1024) + "...";
}
if (markdownFormat) {
System.out.printf("%s|0x%s|%s|%s%n",
directoryName,
Integer.toHexString(tag.getTagType()),
tagName,
description);
} else {
// simple formatting
if (showHex) {
System.out.printf("[%s - %s] %s = %s%n", directoryName, tag.getTagTypeHex(), tagName, description);
} else {
System.out.printf("[%s] %s = %s%n", directoryName, tagName, description);
}
}
}
// print out any errors
for (String error : directory.getErrors())
System.err.println("ERROR: " + error);
}
if (args.length > 1 && thumbRequested) {
ExifThumbnailDirectory directory = metadata.getFirstDirectoryOfType(ExifThumbnailDirectory.class);
if (directory!=null && directory.hasThumbnailData()) {
System.out.println("Writing thumbnail...");
directory.writeThumbnail(args[0].trim() + ".thumb.jpg");
} else {
System.out.println("No thumbnail data exists in this image");
}
}
}
}
}