+++ /dev/null
-package tim.prune.jpeg;
-
-import java.io.File;
-
-import com.drew.imaging.ImageMetadataReader;
-import com.drew.lang.Rational;
-import com.drew.metadata.Directory;
-import com.drew.metadata.Metadata;
-import com.drew.metadata.exif.ExifSubIFDDirectory;
-import com.drew.metadata.exif.ExifIFD0Directory;
-import com.drew.metadata.exif.ExifReader;
-import com.drew.metadata.exif.ExifThumbnailDirectory;
-import com.drew.metadata.exif.GpsDirectory;
-
-/**
- * Class to act as a gateway into the external exif library functions.
- * This should be the only class with dependence on the lib-metadata-extractor-java
- * classes (which are NOT delivered with GpsPrune).
- * This class will not compile without this extra dependency (but is not required if
- * the ExifGateway uses the InternalExifLibrary instead).
- * Should not be included if the internal library will be used (from jpeg.drew package).
- */
-public class ExternalExifLibrary implements ExifLibrary
-{
- /**
- * Use the _external_ exif library to get the data from the given file
- * @param inFile file to access
- * @return Jpeg data if available, otherwise null
- */
- public JpegData getJpegData(File inFile)
- {
- JpegData data = new JpegData();
- // Read exif data from picture
- try
- {
- Metadata metadata = ImageMetadataReader.readMetadata(inFile);
- if (metadata.containsDirectory(GpsDirectory.class))
- {
- Directory gpsdir = metadata.getDirectory(GpsDirectory.class);
- if (gpsdir.containsTag(GpsDirectory.TAG_LATITUDE)
- && gpsdir.containsTag(GpsDirectory.TAG_LONGITUDE)
- && gpsdir.containsTag(GpsDirectory.TAG_LATITUDE_REF)
- && gpsdir.containsTag(GpsDirectory.TAG_LONGITUDE_REF))
- {
- data.setLatitudeRef(gpsdir.getString(GpsDirectory.TAG_LATITUDE_REF));
- Rational[] latRats = gpsdir.getRationalArray(GpsDirectory.TAG_LATITUDE);
- double seconds = ExifGateway.convertToPositiveValue(latRats[2].getNumerator(), latRats[2].getDenominator());
- data.setLatitude(new double[] {latRats[0].doubleValue(),
- latRats[1].doubleValue(), seconds});
- data.setLongitudeRef(gpsdir.getString(GpsDirectory.TAG_LONGITUDE_REF));
- Rational[] lonRats = gpsdir.getRationalArray(GpsDirectory.TAG_LONGITUDE);
- seconds = ExifGateway.convertToPositiveValue(lonRats[2].getNumerator(), lonRats[2].getDenominator());
- data.setLongitude(new double[] {lonRats[0].doubleValue(),
- lonRats[1].doubleValue(), seconds});
- }
-
- // Altitude (if present)
- if (gpsdir.containsTag(GpsDirectory.TAG_ALTITUDE) && gpsdir.containsTag(GpsDirectory.TAG_ALTITUDE_REF))
- {
- data.setAltitude(gpsdir.getRational(GpsDirectory.TAG_ALTITUDE).intValue());
- byte altRef = (byte) gpsdir.getInt(GpsDirectory.TAG_ALTITUDE_REF);
- data.setAltitudeRef(altRef);
- }
-
- // Timestamp and datestamp (if present)
- final int TAG_DATESTAMP = 0x001d;
- if (gpsdir.containsTag(GpsDirectory.TAG_TIME_STAMP) && gpsdir.containsTag(TAG_DATESTAMP))
- {
- Rational[] times = gpsdir.getRationalArray(GpsDirectory.TAG_TIME_STAMP);
- data.setGpsTimestamp(new int[] {times[0].intValue(), times[1].intValue(),
- times[2].intValue()});
- Rational[] dates = gpsdir.getRationalArray(TAG_DATESTAMP);
- if (dates != null) {
- data.setGpsDatestamp(new int[] {dates[0].intValue(), dates[1].intValue(), dates[2].intValue()});
- }
- }
-
- // Image bearing (if present)
- if (gpsdir.containsTag(GpsDirectory.TAG_IMG_DIRECTION) && gpsdir.containsTag(GpsDirectory.TAG_IMG_DIRECTION_REF))
- {
- Rational bearing = gpsdir.getRational(GpsDirectory.TAG_IMG_DIRECTION);
- if (bearing != null) {
- data.setBearing(bearing.doubleValue());
- }
- }
- }
-
- // Tags from Exif directory
- if (metadata.containsDirectory(ExifSubIFDDirectory.class))
- {
- Directory exifdir = metadata.getDirectory(ExifSubIFDDirectory.class);
-
- // Take time and date from exif tags
- if (exifdir.containsTag(ExifSubIFDDirectory.TAG_DATETIME_ORIGINAL)) {
- data.setOriginalTimestamp(exifdir.getString(ExifSubIFDDirectory.TAG_DATETIME_ORIGINAL));
- }
- // Also take "digitized" timestamp
- if (exifdir.containsTag(ExifSubIFDDirectory.TAG_DATETIME_DIGITIZED)) {
- data.setDigitizedTimestamp(exifdir.getString(ExifSubIFDDirectory.TAG_DATETIME_DIGITIZED));
- }
- }
- if (metadata.containsDirectory(ExifIFD0Directory.class))
- {
- Directory exifdir = metadata.getDirectory(ExifIFD0Directory.class);
-
- // Photo rotation code
- if (exifdir.containsTag(ExifIFD0Directory.TAG_ORIENTATION)) {
- data.setOrientationCode(exifdir.getInt(ExifIFD0Directory.TAG_ORIENTATION));
- // NOTE: this presumably takes the _last_ orientation value found, not the first.
- }
- }
-
- if (metadata.containsDirectory(ExifThumbnailDirectory.class))
- {
- ExifThumbnailDirectory exifdir = metadata.getDirectory(ExifThumbnailDirectory.class);
-
- // TODO: Check this thumbnail stuff
- if (exifdir.hasThumbnailData())
- {
- // Make a copy of the byte data
- byte[] tdata = exifdir.getThumbnailData();
- byte[] thumb = new byte[tdata.length];
- System.arraycopy(tdata, 0, thumb, 0, tdata.length);
- data.setThumbnailImage(thumb);
- }
- }
-
- }
- catch (Exception e) {
- // Exception reading metadata, just ignore it
- //System.err.println("Error: " + e.getClass().getName() + " - " + e.getMessage());
- }
- return data;
- }
-
-
- /**
- * Check whether the exifreader class can be correctly resolved
- * @return true if it looks ok
- */
- public boolean looksOK()
- {
- try {
- String test = ExifReader.class.getName();
- if (test != null) return true;
- }
- catch (LinkageError le) {}
- return false;
- }
-}
projects / GpsPrune.git / blobdiff