DO NOT MERGE: Remove the use of JHEAD in ExifInterface
Bug: 29270469
Change-Id: I6a6c8aeab2a842ff1646316363d614851625e78f
diff --git a/media/java/android/media/ExifInterface.java b/media/java/android/media/ExifInterface.java
index 6bf5721..c5e978f 100644
--- a/media/java/android/media/ExifInterface.java
+++ b/media/java/android/media/ExifInterface.java
@@ -16,85 +16,307 @@
package android.media;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.util.Log;
+import android.util.Pair;
+
+import libcore.io.IoUtils;
+import libcore.io.Streams;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FilterOutputStream;
import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.Charset;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
+import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
+import java.util.HashSet;
import java.util.Map;
+import java.util.Set;
import java.util.TimeZone;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
/**
* This is a class for reading and writing Exif tags in a JPEG file.
*/
public class ExifInterface {
+ private static final String TAG = "ExifInterface";
+ private static final boolean DEBUG = false;
+
// The Exif tag names
- /** Type is int. */
- public static final String TAG_ORIENTATION = "Orientation";
+ /** Type is String. @hide */
+ public static final String TAG_ARTIST = "Artist";
+ /** Type is int. @hide */
+ public static final String TAG_BITS_PER_SAMPLE = "BitsPerSample";
+ /** Type is int. @hide */
+ public static final String TAG_COMPRESSION = "Compression";
+ /** Type is String. @hide */
+ public static final String TAG_COPYRIGHT = "Copyright";
/** Type is String. */
public static final String TAG_DATETIME = "DateTime";
+ /** Type is String. @hide */
+ public static final String TAG_IMAGE_DESCRIPTION = "ImageDescription";
+ /** Type is int. */
+ public static final String TAG_IMAGE_LENGTH = "ImageLength";
+ /** Type is int. */
+ public static final String TAG_IMAGE_WIDTH = "ImageWidth";
+ /** Type is int. @hide */
+ public static final String TAG_JPEG_INTERCHANGE_FORMAT = "JPEGInterchangeFormat";
+ /** Type is int. @hide */
+ public static final String TAG_JPEG_INTERCHANGE_FORMAT_LENGTH = "JPEGInterchangeFormatLength";
/** Type is String. */
public static final String TAG_MAKE = "Make";
/** Type is String. */
public static final String TAG_MODEL = "Model";
/** Type is int. */
- public static final String TAG_FLASH = "Flash";
- /** Type is int. */
- public static final String TAG_IMAGE_WIDTH = "ImageWidth";
- /** Type is int. */
- public static final String TAG_IMAGE_LENGTH = "ImageLength";
- /** String. Format is "num1/denom1,num2/denom2,num3/denom3". */
- public static final String TAG_GPS_LATITUDE = "GPSLatitude";
- /** String. Format is "num1/denom1,num2/denom2,num3/denom3". */
- public static final String TAG_GPS_LONGITUDE = "GPSLongitude";
- /** Type is String. */
- public static final String TAG_GPS_LATITUDE_REF = "GPSLatitudeRef";
- /** Type is String. */
- public static final String TAG_GPS_LONGITUDE_REF = "GPSLongitudeRef";
- /** Type is String. */
- public static final String TAG_EXPOSURE_TIME = "ExposureTime";
- /** Type is String. */
- public static final String TAG_APERTURE = "FNumber";
- /** Type is String. */
- public static final String TAG_ISO = "ISOSpeedRatings";
+ public static final String TAG_ORIENTATION = "Orientation";
+ /** Type is int. @hide */
+ public static final String TAG_PHOTOMETRIC_INTERPRETATION = "PhotometricInterpretation";
+ /** Type is int. @hide */
+ public static final String TAG_PLANAR_CONFIGURATION = "PlanarConfiguration";
+ /** Type is rational. @hide */
+ public static final String TAG_PRIMARY_CHROMATICITIES = "PrimaryChromaticities";
+ /** Type is rational. @hide */
+ public static final String TAG_REFERENCE_BLACK_WHITE = "ReferenceBlackWhite";
+ /** Type is int. @hide */
+ public static final String TAG_RESOLUTION_UNIT = "ResolutionUnit";
+ /** Type is int. @hide */
+ public static final String TAG_ROWS_PER_STRIP = "RowsPerStrip";
+ /** Type is int. @hide */
+ public static final String TAG_SAMPLES_PER_PIXEL = "SamplesPerPixel";
+ /** Type is String. @hide */
+ public static final String TAG_SOFTWARE = "Software";
+ /** Type is int. @hide */
+ public static final String TAG_STRIP_BYTE_COUNTS = "StripByteCounts";
+ /** Type is int. @hide */
+ public static final String TAG_STRIP_OFFSETS = "StripOffsets";
+ /** Type is int. @hide */
+ public static final String TAG_TRANSFER_FUNCTION = "TransferFunction";
+ /** Type is rational. @hide */
+ public static final String TAG_WHITE_POINT = "WhitePoint";
+ /** Type is rational. @hide */
+ public static final String TAG_X_RESOLUTION = "XResolution";
+ /** Type is rational. @hide */
+ public static final String TAG_Y_CB_CR_COEFFICIENTS = "YCbCrCoefficients";
+ /** Type is int. @hide */
+ public static final String TAG_Y_CB_CR_POSITIONING = "YCbCrPositioning";
+ /** Type is int. @hide */
+ public static final String TAG_Y_CB_CR_SUB_SAMPLING = "YCbCrSubSampling";
+ /** Type is rational. @hide */
+ public static final String TAG_Y_RESOLUTION = "YResolution";
+ /** Type is rational. @hide */
+ public static final String TAG_APERTURE_VALUE = "ApertureValue";
+ /** Type is rational. @hide */
+ public static final String TAG_BRIGHTNESS_VALUE = "BrightnessValue";
+ /** Type is String. @hide */
+ public static final String TAG_CFA_PATTERN = "CFAPattern";
+ /** Type is int. @hide */
+ public static final String TAG_COLOR_SPACE = "ColorSpace";
+ /** Type is String. @hide */
+ public static final String TAG_COMPONENTS_CONFIGURATION = "ComponentsConfiguration";
+ /** Type is rational. @hide */
+ public static final String TAG_COMPRESSED_BITS_PER_PIXEL = "CompressedBitsPerPixel";
+ /** Type is int. @hide */
+ public static final String TAG_CONTRAST = "Contrast";
+ /** Type is int. @hide */
+ public static final String TAG_CUSTOM_RENDERED = "CustomRendered";
/** Type is String. */
public static final String TAG_DATETIME_DIGITIZED = "DateTimeDigitized";
+ /** Type is String. @hide */
+ public static final String TAG_DATETIME_ORIGINAL = "DateTimeOriginal";
+ /** Type is String. @hide */
+ public static final String TAG_DEVICE_SETTING_DESCRIPTION = "DeviceSettingDescription";
+ /** Type is double. @hide */
+ public static final String TAG_DIGITAL_ZOOM_RATIO = "DigitalZoomRatio";
+ /** Type is String. @hide */
+ public static final String TAG_EXIF_VERSION = "ExifVersion";
+ /** Type is double. @hide */
+ public static final String TAG_EXPOSURE_BIAS_VALUE = "ExposureBiasValue";
+ /** Type is rational. @hide */
+ public static final String TAG_EXPOSURE_INDEX = "ExposureIndex";
+ /** Type is int. @hide */
+ public static final String TAG_EXPOSURE_MODE = "ExposureMode";
+ /** Type is int. @hide */
+ public static final String TAG_EXPOSURE_PROGRAM = "ExposureProgram";
+ /** Type is double. */
+ public static final String TAG_EXPOSURE_TIME = "ExposureTime";
+ /** Type is double. */
+ public static final String TAG_APERTURE = "FNumber";
+ /** Type is String. @hide */
+ public static final String TAG_FILE_SOURCE = "FileSource";
/** Type is int. */
+ public static final String TAG_FLASH = "Flash";
+ /** Type is rational. @hide */
+ public static final String TAG_FLASH_ENERGY = "FlashEnergy";
+ /** Type is String. @hide */
+ public static final String TAG_FLASHPIX_VERSION = "FlashpixVersion";
+ /** Type is rational. */
+ public static final String TAG_FOCAL_LENGTH = "FocalLength";
+ /** Type is int. @hide */
+ public static final String TAG_FOCAL_LENGTH_IN_35MM_FILM = "FocalLengthIn35mmFilm";
+ /** Type is int. @hide */
+ public static final String TAG_FOCAL_PLANE_RESOLUTION_UNIT = "FocalPlaneResolutionUnit";
+ /** Type is rational. @hide */
+ public static final String TAG_FOCAL_PLANE_X_RESOLUTION = "FocalPlaneXResolution";
+ /** Type is rational. @hide */
+ public static final String TAG_FOCAL_PLANE_Y_RESOLUTION = "FocalPlaneYResolution";
+ /** Type is int. @hide */
+ public static final String TAG_GAIN_CONTROL = "GainControl";
+ /** Type is int. */
+ public static final String TAG_ISO = "ISOSpeedRatings";
+ /** Type is String. @hide */
+ public static final String TAG_IMAGE_UNIQUE_ID = "ImageUniqueID";
+ /** Type is int. @hide */
+ public static final String TAG_LIGHT_SOURCE = "LightSource";
+ /** Type is String. @hide */
+ public static final String TAG_MAKER_NOTE = "MakerNote";
+ /** Type is rational. @hide */
+ public static final String TAG_MAX_APERTURE_VALUE = "MaxApertureValue";
+ /** Type is int. @hide */
+ public static final String TAG_METERING_MODE = "MeteringMode";
+ /** Type is String. @hide */
+ public static final String TAG_OECF = "OECF";
+ /** Type is int. @hide */
+ public static final String TAG_PIXEL_X_DIMENSION = "PixelXDimension";
+ /** Type is int. @hide */
+ public static final String TAG_PIXEL_Y_DIMENSION = "PixelYDimension";
+ /** Type is String. @hide */
+ public static final String TAG_RELATED_SOUND_FILE = "RelatedSoundFile";
+ /** Type is int. @hide */
+ public static final String TAG_SATURATION = "Saturation";
+ /** Type is int. @hide */
+ public static final String TAG_SCENE_CAPTURE_TYPE = "SceneCaptureType";
+ /** Type is String. @hide */
+ public static final String TAG_SCENE_TYPE = "SceneType";
+ /** Type is int. @hide */
+ public static final String TAG_SENSING_METHOD = "SensingMethod";
+ /** Type is int. @hide */
+ public static final String TAG_SHARPNESS = "Sharpness";
+ /** Type is rational. @hide */
+ public static final String TAG_SHUTTER_SPEED_VALUE = "ShutterSpeedValue";
+ /** Type is String. @hide */
+ public static final String TAG_SPATIAL_FREQUENCY_RESPONSE = "SpatialFrequencyResponse";
+ /** Type is String. @hide */
+ public static final String TAG_SPECTRAL_SENSITIVITY = "SpectralSensitivity";
+ /** Type is String. */
public static final String TAG_SUBSEC_TIME = "SubSecTime";
- /** Type is int. */
- public static final String TAG_SUBSEC_TIME_ORIG = "SubSecTimeOriginal";
- /** Type is int. */
+ /** Type is String. */
public static final String TAG_SUBSEC_TIME_DIG = "SubSecTimeDigitized";
-
-
-
- /**
- * @hide
- */
- public static final String TAG_SUBSECTIME = "SubSecTime";
-
+ /** Type is String. */
+ public static final String TAG_SUBSEC_TIME_ORIG = "SubSecTimeOriginal";
+ /** Type is int. @hide */
+ public static final String TAG_SUBJECT_AREA = "SubjectArea";
+ /** Type is double. @hide */
+ public static final String TAG_SUBJECT_DISTANCE = "SubjectDistance";
+ /** Type is int. @hide */
+ public static final String TAG_SUBJECT_DISTANCE_RANGE = "SubjectDistanceRange";
+ /** Type is int. @hide */
+ public static final String TAG_SUBJECT_LOCATION = "SubjectLocation";
+ /** Type is String. @hide */
+ public static final String TAG_USER_COMMENT = "UserComment";
+ /** Type is int. */
+ public static final String TAG_WHITE_BALANCE = "WhiteBalance";
/**
* The altitude (in meters) based on the reference in TAG_GPS_ALTITUDE_REF.
* Type is rational.
*/
public static final String TAG_GPS_ALTITUDE = "GPSAltitude";
-
/**
* 0 if the altitude is above sea level. 1 if the altitude is below sea
* level. Type is int.
*/
public static final String TAG_GPS_ALTITUDE_REF = "GPSAltitudeRef";
-
- /** Type is String. */
- public static final String TAG_GPS_TIMESTAMP = "GPSTimeStamp";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_AREA_INFORMATION = "GPSAreaInformation";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_DOP = "GPSDOP";
/** Type is String. */
public static final String TAG_GPS_DATESTAMP = "GPSDateStamp";
- /** Type is int. */
- public static final String TAG_WHITE_BALANCE = "WhiteBalance";
- /** Type is rational. */
- public static final String TAG_FOCAL_LENGTH = "FocalLength";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_DEST_BEARING = "GPSDestBearing";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_DEST_BEARING_REF = "GPSDestBearingRef";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_DEST_DISTANCE = "GPSDestDistance";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_DEST_DISTANCE_REF = "GPSDestDistanceRef";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_DEST_LATITUDE = "GPSDestLatitude";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_DEST_LATITUDE_REF = "GPSDestLatitudeRef";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_DEST_LONGITUDE = "GPSDestLongitude";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_DEST_LONGITUDE_REF = "GPSDestLongitudeRef";
+ /** Type is int. @hide */
+ public static final String TAG_GPS_DIFFERENTIAL = "GPSDifferential";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_IMG_DIRECTION = "GPSImgDirection";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_IMG_DIRECTION_REF = "GPSImgDirectionRef";
+ /** Type is rational. Format is "num1/denom1,num2/denom2,num3/denom3". */
+ public static final String TAG_GPS_LATITUDE = "GPSLatitude";
+ /** Type is String. */
+ public static final String TAG_GPS_LATITUDE_REF = "GPSLatitudeRef";
+ /** Type is rational. Format is "num1/denom1,num2/denom2,num3/denom3". */
+ public static final String TAG_GPS_LONGITUDE = "GPSLongitude";
+ /** Type is String. */
+ public static final String TAG_GPS_LONGITUDE_REF = "GPSLongitudeRef";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_MAP_DATUM = "GPSMapDatum";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_MEASURE_MODE = "GPSMeasureMode";
/** Type is String. Name of GPS processing method used for location finding. */
public static final String TAG_GPS_PROCESSING_METHOD = "GPSProcessingMethod";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_SATELLITES = "GPSSatellites";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_SPEED = "GPSSpeed";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_SPEED_REF = "GPSSpeedRef";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_STATUS = "GPSStatus";
+ /** Type is String. Format is "hh:mm:ss". */
+ public static final String TAG_GPS_TIMESTAMP = "GPSTimeStamp";
+ /** Type is rational. @hide */
+ public static final String TAG_GPS_TRACK = "GPSTrack";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_TRACK_REF = "GPSTrackRef";
+ /** Type is String. @hide */
+ public static final String TAG_GPS_VERSION_ID = "GPSVersionID";
+ /** Type is String. @hide */
+ public static final String TAG_INTEROPERABILITY_INDEX = "InteroperabilityIndex";
+ /** Type is int. @hide */
+ public static final String TAG_THUMBNAIL_IMAGE_LENGTH = "ThumbnailImageLength";
+ /** Type is int. @hide */
+ public static final String TAG_THUMBNAIL_IMAGE_WIDTH = "ThumbnailImageWidth";
+
+ // Private tags used for pointing the other IFD offset. The types of the following tags are int.
+ private static final String TAG_EXIF_IFD_POINTER = "ExifIFDPointer";
+ private static final String TAG_GPS_INFO_IFD_POINTER = "GPSInfoIFDPointer";
+ private static final String TAG_INTEROPERABILITY_IFD_POINTER = "InteroperabilityIFDPointer";
+
+ // Private tags used for thumbnail information.
+ private static final String TAG_HAS_THUMBNAIL = "HasThumbnail";
+ private static final String TAG_THUMBNAIL_OFFSET = "ThumbnailOffset";
+ private static final String TAG_THUMBNAIL_LENGTH = "ThumbnailLength";
+ private static final String TAG_THUMBNAIL_DATA = "ThumbnailData";
// Constants used for the Orientation Exif tag.
public static final int ORIENTATION_UNDEFINED = 0;
@@ -102,34 +324,730 @@
public static final int ORIENTATION_FLIP_HORIZONTAL = 2; // left right reversed mirror
public static final int ORIENTATION_ROTATE_180 = 3;
public static final int ORIENTATION_FLIP_VERTICAL = 4; // upside down mirror
- public static final int ORIENTATION_TRANSPOSE = 5; // flipped about top-left <--> bottom-right axis
+ // flipped about top-left <--> bottom-right axis
+ public static final int ORIENTATION_TRANSPOSE = 5;
public static final int ORIENTATION_ROTATE_90 = 6; // rotate 90 cw to right it
- public static final int ORIENTATION_TRANSVERSE = 7; // flipped about top-right <--> bottom-left axis
+ // flipped about top-right <--> bottom-left axis
+ public static final int ORIENTATION_TRANSVERSE = 7;
public static final int ORIENTATION_ROTATE_270 = 8; // rotate 270 to right it
// Constants used for white balance
public static final int WHITEBALANCE_AUTO = 0;
public static final int WHITEBALANCE_MANUAL = 1;
+
private static SimpleDateFormat sFormatter;
- static {
- System.loadLibrary("jhead_jni");
- sFormatter = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
- sFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
+ // See Exchangeable image file format for digital still cameras: Exif version 2.2.
+ // The following values are for parsing EXIF data area. There are tag groups in EXIF data area.
+ // They are called "Image File Directory". They have multiple data formats to cover various
+ // image metadata from GPS longitude to camera model name.
+
+ // Types of Exif byte alignments (see JEITA CP-3451 page 10)
+ private static final short BYTE_ALIGN_II = 0x4949; // II: Intel order
+ private static final short BYTE_ALIGN_MM = 0x4d4d; // MM: Motorola order
+
+ // Formats for the value in IFD entry (See TIFF 6.0 spec Types page 15).
+ private static final int IFD_FORMAT_BYTE = 1;
+ private static final int IFD_FORMAT_STRING = 2;
+ private static final int IFD_FORMAT_USHORT = 3;
+ private static final int IFD_FORMAT_ULONG = 4;
+ private static final int IFD_FORMAT_URATIONAL = 5;
+ private static final int IFD_FORMAT_SBYTE = 6;
+ private static final int IFD_FORMAT_UNDEFINED = 7;
+ private static final int IFD_FORMAT_SSHORT = 8;
+ private static final int IFD_FORMAT_SLONG = 9;
+ private static final int IFD_FORMAT_SRATIONAL = 10;
+ private static final int IFD_FORMAT_SINGLE = 11;
+ private static final int IFD_FORMAT_DOUBLE = 12;
+ // Names for the data formats for debugging purpose.
+ private static final String[] IFD_FORMAT_NAMES = new String[] {
+ "", "BYTE", "STRING", "USHORT", "ULONG", "URATIONAL", "SBYTE", "UNDEFINED", "SSHORT",
+ "SLONG", "SRATIONAL", "SINGLE", "DOUBLE"
+ };
+ // Sizes of the components of each IFD value format
+ private static final int[] IFD_FORMAT_BYTES_PER_FORMAT = new int[] {
+ 0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8
+ };
+ private static final byte[] EXIF_ASCII_PREFIX = new byte[] {
+ 0x41, 0x53, 0x43, 0x49, 0x49, 0x0, 0x0, 0x0
+ };
+
+ // A class for indicating EXIF rational type.
+ private static class Rational {
+ public final long numerator;
+ public final long denominator;
+
+ private Rational(long numerator, long denominator) {
+ // Handle erroneous case
+ if (denominator == 0) {
+ this.numerator = 0;
+ this.denominator = 1;
+ return;
+ }
+ this.numerator = numerator;
+ this.denominator = denominator;
+ }
+
+ @Override
+ public String toString() {
+ return numerator + "/" + denominator;
+ }
+
+ public double calculate() {
+ return (double) numerator / denominator;
+ }
}
- private String mFilename;
- private HashMap<String, String> mAttributes;
- private boolean mHasThumbnail;
+ // A class for indicating EXIF attribute.
+ private static class ExifAttribute {
+ public final int format;
+ public final int numberOfComponents;
+ public final byte[] bytes;
- // Because the underlying implementation (jhead) uses static variables,
- // there can only be one user at a time for the native functions (and
- // they cannot keep state in the native code across function calls). We
- // use sLock to serialize the accesses.
- private static final Object sLock = new Object();
+ private ExifAttribute(int format, int numberOfComponents, byte[] bytes) {
+ this.format = format;
+ this.numberOfComponents = numberOfComponents;
+ this.bytes = bytes;
+ }
+
+ public static ExifAttribute createUShort(int[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_USHORT] * values.length]);
+ buffer.order(byteOrder);
+ for (int value : values) {
+ buffer.putShort((short) value);
+ }
+ return new ExifAttribute(IFD_FORMAT_USHORT, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createUShort(int value, ByteOrder byteOrder) {
+ return createUShort(new int[] {value}, byteOrder);
+ }
+
+ public static ExifAttribute createULong(long[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_ULONG] * values.length]);
+ buffer.order(byteOrder);
+ for (long value : values) {
+ buffer.putInt((int) value);
+ }
+ return new ExifAttribute(IFD_FORMAT_ULONG, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createULong(long value, ByteOrder byteOrder) {
+ return createULong(new long[] {value}, byteOrder);
+ }
+
+ public static ExifAttribute createSLong(int[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_SLONG] * values.length]);
+ buffer.order(byteOrder);
+ for (int value : values) {
+ buffer.putInt(value);
+ }
+ return new ExifAttribute(IFD_FORMAT_SLONG, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createSLong(int value, ByteOrder byteOrder) {
+ return createSLong(new int[] {value}, byteOrder);
+ }
+
+ public static ExifAttribute createByte(String value) {
+ // Exception for GPSAltitudeRef tag
+ if (value.length() == 1 && value.charAt(0) >= '0' && value.charAt(0) <= '1') {
+ final byte[] bytes = new byte[] { (byte) (value.charAt(0) - '0') };
+ return new ExifAttribute(IFD_FORMAT_BYTE, bytes.length, bytes);
+ }
+ final byte[] ascii = value.getBytes(ASCII);
+ return new ExifAttribute(IFD_FORMAT_BYTE, ascii.length, ascii);
+ }
+
+ public static ExifAttribute createString(String value) {
+ final byte[] ascii = (value + '\0').getBytes(ASCII);
+ return new ExifAttribute(IFD_FORMAT_STRING, ascii.length, ascii);
+ }
+
+ public static ExifAttribute createURational(Rational[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_URATIONAL] * values.length]);
+ buffer.order(byteOrder);
+ for (Rational value : values) {
+ buffer.putInt((int) value.numerator);
+ buffer.putInt((int) value.denominator);
+ }
+ return new ExifAttribute(IFD_FORMAT_URATIONAL, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createURational(Rational value, ByteOrder byteOrder) {
+ return createURational(new Rational[] {value}, byteOrder);
+ }
+
+ public static ExifAttribute createSRational(Rational[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_SRATIONAL] * values.length]);
+ buffer.order(byteOrder);
+ for (Rational value : values) {
+ buffer.putInt((int) value.numerator);
+ buffer.putInt((int) value.denominator);
+ }
+ return new ExifAttribute(IFD_FORMAT_SRATIONAL, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createSRational(Rational value, ByteOrder byteOrder) {
+ return createSRational(new Rational[] {value}, byteOrder);
+ }
+
+ public static ExifAttribute createDouble(double[] values, ByteOrder byteOrder) {
+ final ByteBuffer buffer = ByteBuffer.wrap(
+ new byte[IFD_FORMAT_BYTES_PER_FORMAT[IFD_FORMAT_DOUBLE] * values.length]);
+ buffer.order(byteOrder);
+ for (double value : values) {
+ buffer.putDouble(value);
+ }
+ return new ExifAttribute(IFD_FORMAT_DOUBLE, values.length, buffer.array());
+ }
+
+ public static ExifAttribute createDouble(double value, ByteOrder byteOrder) {
+ return createDouble(new double[] {value}, byteOrder);
+ }
+
+ @Override
+ public String toString() {
+ return "(" + IFD_FORMAT_NAMES[format] + ", data length:" + bytes.length + ")";
+ }
+
+ private Object getValue(ByteOrder byteOrder) {
+ try {
+ ByteOrderAwarenessDataInputStream inputStream =
+ new ByteOrderAwarenessDataInputStream(bytes);
+ inputStream.setByteOrder(byteOrder);
+ switch (format) {
+ case IFD_FORMAT_BYTE:
+ case IFD_FORMAT_SBYTE: {
+ // Exception for GPSAltitudeRef tag
+ if (bytes.length == 1 && bytes[0] >= 0 && bytes[0] <= 1) {
+ return new String(new char[] { (char) (bytes[0] + '0') });
+ }
+ return new String(bytes, ASCII);
+ }
+ case IFD_FORMAT_UNDEFINED:
+ case IFD_FORMAT_STRING: {
+ int index = 0;
+ if (numberOfComponents >= EXIF_ASCII_PREFIX.length) {
+ boolean same = true;
+ for (int i = 0; i < EXIF_ASCII_PREFIX.length; ++i) {
+ if (bytes[i] != EXIF_ASCII_PREFIX[i]) {
+ same = false;
+ break;
+ }
+ }
+ if (same) {
+ index = EXIF_ASCII_PREFIX.length;
+ }
+ }
+
+ StringBuilder stringBuilder = new StringBuilder();
+ while (index < numberOfComponents) {
+ int ch = bytes[index];
+ if (ch == 0) {
+ break;
+ }
+ if (ch >= 32) {
+ stringBuilder.append((char) ch);
+ } else {
+ stringBuilder.append('?');
+ }
+ ++index;
+ }
+ return stringBuilder.toString();
+ }
+ case IFD_FORMAT_USHORT: {
+ final int[] values = new int[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readUnsignedShort();
+ }
+ return values;
+ }
+ case IFD_FORMAT_ULONG: {
+ final long[] values = new long[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readUnsignedInt();
+ }
+ return values;
+ }
+ case IFD_FORMAT_URATIONAL: {
+ final Rational[] values = new Rational[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ final long numerator = inputStream.readUnsignedInt();
+ final long denominator = inputStream.readUnsignedInt();
+ values[i] = new Rational(numerator, denominator);
+ }
+ return values;
+ }
+ case IFD_FORMAT_SSHORT: {
+ final int[] values = new int[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readShort();
+ }
+ return values;
+ }
+ case IFD_FORMAT_SLONG: {
+ final int[] values = new int[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readInt();
+ }
+ return values;
+ }
+ case IFD_FORMAT_SRATIONAL: {
+ final Rational[] values = new Rational[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ final long numerator = inputStream.readInt();
+ final long denominator = inputStream.readInt();
+ values[i] = new Rational(numerator, denominator);
+ }
+ return values;
+ }
+ case IFD_FORMAT_SINGLE: {
+ final double[] values = new double[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readFloat();
+ }
+ return values;
+ }
+ case IFD_FORMAT_DOUBLE: {
+ final double[] values = new double[numberOfComponents];
+ for (int i = 0; i < numberOfComponents; ++i) {
+ values[i] = inputStream.readDouble();
+ }
+ return values;
+ }
+ default:
+ return null;
+ }
+ } catch (IOException e) {
+ Log.w(TAG, "IOException occurred during reading a value", e);
+ return null;
+ }
+ }
+
+ public double getDoubleValue(ByteOrder byteOrder) {
+ Object value = getValue(byteOrder);
+ if (value == null) {
+ throw new NumberFormatException("NULL can't be converted to a double value");
+ }
+ if (value instanceof String) {
+ return Double.parseDouble((String) value);
+ }
+ if (value instanceof long[]) {
+ long[] array = (long[]) value;
+ if (array.length == 1) {
+ return array[0];
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ if (value instanceof int[]) {
+ int[] array = (int[]) value;
+ if (array.length == 1) {
+ return array[0];
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ if (value instanceof double[]) {
+ double[] array = (double[]) value;
+ if (array.length == 1) {
+ return array[0];
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ if (value instanceof Rational[]) {
+ Rational[] array = (Rational[]) value;
+ if (array.length == 1) {
+ return array[0].calculate();
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ throw new NumberFormatException("Couldn't find a double value");
+ }
+
+ public int getIntValue(ByteOrder byteOrder) {
+ Object value = getValue(byteOrder);
+ if (value == null) {
+ throw new NumberFormatException("NULL can't be converted to a integer value");
+ }
+ if (value instanceof String) {
+ return Integer.parseInt((String) value);
+ }
+ if (value instanceof long[]) {
+ long[] array = (long[]) value;
+ if (array.length == 1) {
+ return (int) array[0];
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ if (value instanceof int[]) {
+ int[] array = (int[]) value;
+ if (array.length == 1) {
+ return array[0];
+ }
+ throw new NumberFormatException("There are more than one component");
+ }
+ throw new NumberFormatException("Couldn't find a integer value");
+ }
+
+ public String getStringValue(ByteOrder byteOrder) {
+ Object value = getValue(byteOrder);
+ if (value == null) {
+ return null;
+ }
+ if (value instanceof String) {
+ return (String) value;
+ }
+
+ final StringBuilder stringBuilder = new StringBuilder();
+ if (value instanceof long[]) {
+ long[] array = (long[]) value;
+ for (int i = 0; i < array.length; ++i) {
+ stringBuilder.append(array[i]);
+ if (i + 1 != array.length) {
+ stringBuilder.append(",");
+ }
+ }
+ return stringBuilder.toString();
+ }
+ if (value instanceof int[]) {
+ int[] array = (int[]) value;
+ for (int i = 0; i < array.length; ++i) {
+ stringBuilder.append(array[i]);
+ if (i + 1 != array.length) {
+ stringBuilder.append(",");
+ }
+ }
+ return stringBuilder.toString();
+ }
+ if (value instanceof double[]) {
+ double[] array = (double[]) value;
+ for (int i = 0; i < array.length; ++i) {
+ stringBuilder.append(array[i]);
+ if (i + 1 != array.length) {
+ stringBuilder.append(",");
+ }
+ }
+ return stringBuilder.toString();
+ }
+ if (value instanceof Rational[]) {
+ Rational[] array = (Rational[]) value;
+ for (int i = 0; i < array.length; ++i) {
+ stringBuilder.append(array[i].numerator);
+ stringBuilder.append('/');
+ stringBuilder.append(array[i].denominator);
+ if (i + 1 != array.length) {
+ stringBuilder.append(",");
+ }
+ }
+ return stringBuilder.toString();
+ }
+ return null;
+ }
+
+ public int size() {
+ return IFD_FORMAT_BYTES_PER_FORMAT[format] * numberOfComponents;
+ }
+ }
+
+ // A class for indicating EXIF tag.
+ private static class ExifTag {
+ public final int number;
+ public final String name;
+ public final int primaryFormat;
+ public final int secondaryFormat;
+
+ private ExifTag(String name, int number, int format) {
+ this.name = name;
+ this.number = number;
+ this.primaryFormat = format;
+ this.secondaryFormat = -1;
+ }
+
+ private ExifTag(String name, int number, int primaryFormat, int secondaryFormat) {
+ this.name = name;
+ this.number = number;
+ this.primaryFormat = primaryFormat;
+ this.secondaryFormat = secondaryFormat;
+ }
+ }
+
+ // Primary image IFD TIFF tags (See JEITA CP-3451 Table 14. page 54).
+ private static final ExifTag[] IFD_TIFF_TAGS = new ExifTag[] {
+ new ExifTag(TAG_IMAGE_WIDTH, 256, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_IMAGE_LENGTH, 257, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_BITS_PER_SAMPLE, 258, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_COMPRESSION, 259, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_PHOTOMETRIC_INTERPRETATION, 262, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_IMAGE_DESCRIPTION, 270, IFD_FORMAT_STRING),
+ new ExifTag(TAG_MAKE, 271, IFD_FORMAT_STRING),
+ new ExifTag(TAG_MODEL, 272, IFD_FORMAT_STRING),
+ new ExifTag(TAG_STRIP_OFFSETS, 273, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_ORIENTATION, 274, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SAMPLES_PER_PIXEL, 277, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_ROWS_PER_STRIP, 278, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_STRIP_BYTE_COUNTS, 279, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_X_RESOLUTION, 282, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_Y_RESOLUTION, 283, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_PLANAR_CONFIGURATION, 284, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_RESOLUTION_UNIT, 296, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_TRANSFER_FUNCTION, 301, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SOFTWARE, 305, IFD_FORMAT_STRING),
+ new ExifTag(TAG_DATETIME, 306, IFD_FORMAT_STRING),
+ new ExifTag(TAG_ARTIST, 315, IFD_FORMAT_STRING),
+ new ExifTag(TAG_WHITE_POINT, 318, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_PRIMARY_CHROMATICITIES, 319, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT, 513, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, 514, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_Y_CB_CR_COEFFICIENTS, 529, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_Y_CB_CR_SUB_SAMPLING, 530, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_Y_CB_CR_POSITIONING, 531, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_REFERENCE_BLACK_WHITE, 532, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_COPYRIGHT, 33432, IFD_FORMAT_STRING),
+ new ExifTag(TAG_EXIF_IFD_POINTER, 34665, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_GPS_INFO_IFD_POINTER, 34853, IFD_FORMAT_ULONG),
+ };
+
+ // Primary image IFD Exif Private tags (See JEITA CP-3451 Table 15. page 55).
+ private static final ExifTag[] IFD_EXIF_TAGS = new ExifTag[] {
+ new ExifTag(TAG_EXPOSURE_TIME, 33434, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_APERTURE, 33437, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_EXPOSURE_PROGRAM, 34850, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SPECTRAL_SENSITIVITY, 34852, IFD_FORMAT_STRING),
+ new ExifTag(TAG_ISO, 34855, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_OECF, 34856, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_EXIF_VERSION, 36864, IFD_FORMAT_STRING),
+ new ExifTag(TAG_DATETIME_ORIGINAL, 36867, IFD_FORMAT_STRING),
+ new ExifTag(TAG_DATETIME_DIGITIZED, 36868, IFD_FORMAT_STRING),
+ new ExifTag(TAG_COMPONENTS_CONFIGURATION, 37121, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_COMPRESSED_BITS_PER_PIXEL, 37122, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_SHUTTER_SPEED_VALUE, 37377, IFD_FORMAT_SRATIONAL),
+ new ExifTag(TAG_APERTURE_VALUE, 37378, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_BRIGHTNESS_VALUE, 37379, IFD_FORMAT_SRATIONAL),
+ new ExifTag(TAG_EXPOSURE_BIAS_VALUE, 37380, IFD_FORMAT_SRATIONAL),
+ new ExifTag(TAG_MAX_APERTURE_VALUE, 37381, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_SUBJECT_DISTANCE, 37382, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_METERING_MODE, 37383, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_LIGHT_SOURCE, 37384, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_FLASH, 37385, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_FOCAL_LENGTH, 37386, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_SUBJECT_AREA, 37396, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_MAKER_NOTE, 37500, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_USER_COMMENT, 37510, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_SUBSEC_TIME, 37520, IFD_FORMAT_STRING),
+ new ExifTag(TAG_SUBSEC_TIME_ORIG, 37521, IFD_FORMAT_STRING),
+ new ExifTag(TAG_SUBSEC_TIME_DIG, 37522, IFD_FORMAT_STRING),
+ new ExifTag(TAG_FLASHPIX_VERSION, 40960, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_COLOR_SPACE, 40961, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_PIXEL_X_DIMENSION, 40962, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_PIXEL_Y_DIMENSION, 40963, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_RELATED_SOUND_FILE, 40964, IFD_FORMAT_STRING),
+ new ExifTag(TAG_INTEROPERABILITY_IFD_POINTER, 40965, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_FLASH_ENERGY, 41483, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_SPATIAL_FREQUENCY_RESPONSE, 41484, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_FOCAL_PLANE_X_RESOLUTION, 41486, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_FOCAL_PLANE_Y_RESOLUTION, 41487, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_FOCAL_PLANE_RESOLUTION_UNIT, 41488, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SUBJECT_LOCATION, 41492, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_EXPOSURE_INDEX, 41493, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_SENSING_METHOD, 41495, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_FILE_SOURCE, 41728, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_SCENE_TYPE, 41729, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_CFA_PATTERN, 41730, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_CUSTOM_RENDERED, 41985, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_EXPOSURE_MODE, 41986, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_WHITE_BALANCE, 41987, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_DIGITAL_ZOOM_RATIO, 41988, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_FOCAL_LENGTH_IN_35MM_FILM, 41989, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SCENE_CAPTURE_TYPE, 41990, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_GAIN_CONTROL, 41991, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_CONTRAST, 41992, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SATURATION, 41993, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SHARPNESS, 41994, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_DEVICE_SETTING_DESCRIPTION, 41995, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_SUBJECT_DISTANCE_RANGE, 41996, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_IMAGE_UNIQUE_ID, 42016, IFD_FORMAT_STRING),
+ };
+
+ // Primary image IFD GPS Info tags (See JEITA CP-3451 Table 16. page 56).
+ private static final ExifTag[] IFD_GPS_TAGS = new ExifTag[] {
+ new ExifTag(TAG_GPS_VERSION_ID, 0, IFD_FORMAT_BYTE),
+ new ExifTag(TAG_GPS_LATITUDE_REF, 1, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_LATITUDE, 2, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_LONGITUDE_REF, 3, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_LONGITUDE, 4, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_ALTITUDE_REF, 5, IFD_FORMAT_BYTE),
+ new ExifTag(TAG_GPS_ALTITUDE, 6, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_TIMESTAMP, 7, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_SATELLITES, 8, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_STATUS, 9, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_MEASURE_MODE, 10, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DOP, 11, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_SPEED_REF, 12, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_SPEED, 13, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_TRACK_REF, 14, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_TRACK, 15, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_IMG_DIRECTION_REF, 16, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_IMG_DIRECTION, 17, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_MAP_DATUM, 18, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DEST_LATITUDE_REF, 19, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DEST_LATITUDE, 20, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_DEST_LONGITUDE_REF, 21, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DEST_LONGITUDE, 22, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_DEST_BEARING_REF, 23, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DEST_BEARING, 24, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_DEST_DISTANCE_REF, 25, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DEST_DISTANCE, 26, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_GPS_PROCESSING_METHOD, 27, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_GPS_AREA_INFORMATION, 28, IFD_FORMAT_UNDEFINED),
+ new ExifTag(TAG_GPS_DATESTAMP, 29, IFD_FORMAT_STRING),
+ new ExifTag(TAG_GPS_DIFFERENTIAL, 30, IFD_FORMAT_USHORT),
+ };
+ // Primary image IFD Interoperability tag (See JEITA CP-3451 Table 17. page 56).
+ private static final ExifTag[] IFD_INTEROPERABILITY_TAGS = new ExifTag[] {
+ new ExifTag(TAG_INTEROPERABILITY_INDEX, 1, IFD_FORMAT_STRING),
+ };
+ // IFD Thumbnail tags (See JEITA CP-3451 Table 18. page 57).
+ private static final ExifTag[] IFD_THUMBNAIL_TAGS = new ExifTag[] {
+ new ExifTag(TAG_THUMBNAIL_IMAGE_WIDTH, 256, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_THUMBNAIL_IMAGE_LENGTH, 257, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_BITS_PER_SAMPLE, 258, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_COMPRESSION, 259, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_PHOTOMETRIC_INTERPRETATION, 262, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_IMAGE_DESCRIPTION, 270, IFD_FORMAT_STRING),
+ new ExifTag(TAG_MAKE, 271, IFD_FORMAT_STRING),
+ new ExifTag(TAG_MODEL, 272, IFD_FORMAT_STRING),
+ new ExifTag(TAG_STRIP_OFFSETS, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_ORIENTATION, 274, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SAMPLES_PER_PIXEL, 277, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_ROWS_PER_STRIP, 278, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_STRIP_BYTE_COUNTS, 279, IFD_FORMAT_USHORT, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_X_RESOLUTION, 282, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_Y_RESOLUTION, 283, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_PLANAR_CONFIGURATION, 284, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_RESOLUTION_UNIT, 296, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_TRANSFER_FUNCTION, 301, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_SOFTWARE, 305, IFD_FORMAT_STRING),
+ new ExifTag(TAG_DATETIME, 306, IFD_FORMAT_STRING),
+ new ExifTag(TAG_ARTIST, 315, IFD_FORMAT_STRING),
+ new ExifTag(TAG_WHITE_POINT, 318, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_PRIMARY_CHROMATICITIES, 319, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT, 513, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, 514, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_Y_CB_CR_COEFFICIENTS, 529, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_Y_CB_CR_SUB_SAMPLING, 530, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_Y_CB_CR_POSITIONING, 531, IFD_FORMAT_USHORT),
+ new ExifTag(TAG_REFERENCE_BLACK_WHITE, 532, IFD_FORMAT_URATIONAL),
+ new ExifTag(TAG_COPYRIGHT, 33432, IFD_FORMAT_STRING),
+ new ExifTag(TAG_EXIF_IFD_POINTER, 34665, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_GPS_INFO_IFD_POINTER, 34853, IFD_FORMAT_ULONG),
+ };
+
+ // See JEITA CP-3451 Figure 5. page 9.
+ // The following values are used for indicating pointers to the other Image File Directorys.
+
+ // Indices of Exif Ifd tag groups
+ private static final int IFD_TIFF_HINT = 0;
+ private static final int IFD_EXIF_HINT = 1;
+ private static final int IFD_GPS_HINT = 2;
+ private static final int IFD_INTEROPERABILITY_HINT = 3;
+ private static final int IFD_THUMBNAIL_HINT = 4;
+ // List of Exif tag groups
+ private static final ExifTag[][] EXIF_TAGS = new ExifTag[][] {
+ IFD_TIFF_TAGS, IFD_EXIF_TAGS, IFD_GPS_TAGS, IFD_INTEROPERABILITY_TAGS,
+ IFD_THUMBNAIL_TAGS
+ };
+ // List of tags for pointing to the other image file directory offset.
+ private static final ExifTag[] IFD_POINTER_TAGS = new ExifTag[] {
+ new ExifTag(TAG_EXIF_IFD_POINTER, 34665, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_GPS_INFO_IFD_POINTER, 34853, IFD_FORMAT_ULONG),
+ new ExifTag(TAG_INTEROPERABILITY_IFD_POINTER, 40965, IFD_FORMAT_ULONG),
+ };
+ // List of indices of the indicated tag groups according to the IFD_POINTER_TAGS
+ private static final int[] IFD_POINTER_TAG_HINTS = new int[] {
+ IFD_EXIF_HINT, IFD_GPS_HINT, IFD_INTEROPERABILITY_HINT
+ };
+ // Tags for indicating the thumbnail offset and length
+ private static final ExifTag JPEG_INTERCHANGE_FORMAT_TAG =
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT, 513, IFD_FORMAT_ULONG);
+ private static final ExifTag JPEG_INTERCHANGE_FORMAT_LENGTH_TAG =
+ new ExifTag(TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, 514, IFD_FORMAT_ULONG);
+
+ // Mappings from tag number to tag name and each item represents one IFD tag group.
+ private static final HashMap[] sExifTagMapsForReading = new HashMap[EXIF_TAGS.length];
+ // Mappings from tag name to tag number and each item represents one IFD tag group.
+ private static final HashMap[] sExifTagMapsForWriting = new HashMap[EXIF_TAGS.length];
+ private static final HashSet<String> sTagSetForCompatibility = new HashSet<>(Arrays.asList(
+ TAG_APERTURE, TAG_DIGITAL_ZOOM_RATIO, TAG_EXPOSURE_TIME, TAG_SUBJECT_DISTANCE,
+ TAG_GPS_TIMESTAMP));
+
+ // See JPEG File Interchange Format Version 1.02.
+ // The following values are defined for handling JPEG streams. In this implementation, we are
+ // not only getting information from EXIF but also from some JPEG special segments such as
+ // MARKER_COM for user comment and MARKER_SOFx for image width and height.
+
+ private static final Charset ASCII = Charset.forName("US-ASCII");
+ // Identifier for EXIF APP1 segment in JPEG
+ private static final byte[] IDENTIFIER_EXIF_APP1 = "Exif\0\0".getBytes(ASCII);
+ // JPEG segment markers, that each marker consumes two bytes beginning with 0xff and ending with
+ // the indicator. There is no SOF4, SOF8, SOF16 markers in JPEG and SOFx markers indicates start
+ // of frame(baseline DCT) and the image size info exists in its beginning part.
+ private static final byte MARKER = (byte) 0xff;
+ private static final byte MARKER_SOI = (byte) 0xd8;
+ private static final byte MARKER_SOF0 = (byte) 0xc0;
+ private static final byte MARKER_SOF1 = (byte) 0xc1;
+ private static final byte MARKER_SOF2 = (byte) 0xc2;
+ private static final byte MARKER_SOF3 = (byte) 0xc3;
+ private static final byte MARKER_SOF5 = (byte) 0xc5;
+ private static final byte MARKER_SOF6 = (byte) 0xc6;
+ private static final byte MARKER_SOF7 = (byte) 0xc7;
+ private static final byte MARKER_SOF9 = (byte) 0xc9;
+ private static final byte MARKER_SOF10 = (byte) 0xca;
+ private static final byte MARKER_SOF11 = (byte) 0xcb;
+ private static final byte MARKER_SOF13 = (byte) 0xcd;
+ private static final byte MARKER_SOF14 = (byte) 0xce;
+ private static final byte MARKER_SOF15 = (byte) 0xcf;
+ private static final byte MARKER_SOS = (byte) 0xda;
+ private static final byte MARKER_APP1 = (byte) 0xe1;
+ private static final byte MARKER_COM = (byte) 0xfe;
+ private static final byte MARKER_EOI = (byte) 0xd9;
+
+ static {
+ sFormatter = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
+ sFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+ // Build up the hash tables to look up Exif tags for reading Exif tags.
+ for (int hint = 0; hint < EXIF_TAGS.length; ++hint) {
+ sExifTagMapsForReading[hint] = new HashMap();
+ sExifTagMapsForWriting[hint] = new HashMap();
+ for (ExifTag tag : EXIF_TAGS[hint]) {
+ sExifTagMapsForReading[hint].put(tag.number, tag);
+ sExifTagMapsForWriting[hint].put(tag.name, tag);
+ }
+ }
+ }
+
+ private final String mFilename;
+ private final HashMap[] mAttributes = new HashMap[EXIF_TAGS.length];
+ private ByteOrder mExifByteOrder = ByteOrder.BIG_ENDIAN;
+ private boolean mHasThumbnail;
+ // The following values used for indicating a thumbnail position.
+ private int mThumbnailOffset;
+ private int mThumbnailLength;
+ private byte[] mThumbnailBytes;
+
+ // Pattern to check non zero timestamp
+ private static final Pattern sNonZeroTimePattern = Pattern.compile(".*[1-9].*");
+ // Pattern to check gps timestamp
+ private static final Pattern sGpsTimestampPattern =
+ Pattern.compile("^([0-9][0-9]):([0-9][0-9]):([0-9][0-9])$");
/**
- * Reads Exif tags from the specified JPEG file.
+ * Reads Exif tags from the specified image file.
*/
public ExifInterface(String filename) throws IOException {
if (filename == null) {
@@ -139,53 +1057,99 @@
loadAttributes();
}
+
+ /**
+ * Returns the EXIF attribute of the specified tag or {@code null} if there is no such tag in
+ * the image file.
+ *
+ * @param tag the name of the tag.
+ */
+ private ExifAttribute getExifAttribute(String tag) {
+ // Retrieves all tag groups. The value from primary image tag group has a higher priority
+ // than the value from the thumbnail tag group if there are more than one candidates.
+ for (int i = 0; i < EXIF_TAGS.length; ++i) {
+ Object value = mAttributes[i].get(tag);
+ if (value != null) {
+ return (ExifAttribute) value;
+ }
+ }
+ return null;
+ }
+
/**
* Returns the value of the specified tag or {@code null} if there
- * is no such tag in the JPEG file.
+ * is no such tag in the image file.
*
* @param tag the name of the tag.
*/
public String getAttribute(String tag) {
- return mAttributes.get(tag);
+ ExifAttribute attribute = getExifAttribute(tag);
+ if (attribute != null) {
+ if (!sTagSetForCompatibility.contains(tag)) {
+ return attribute.getStringValue(mExifByteOrder);
+ }
+ if (tag.equals(TAG_GPS_TIMESTAMP)) {
+ // Convert the rational values to the custom formats for backwards compatibility.
+ if (attribute.format != IFD_FORMAT_URATIONAL
+ && attribute.format != IFD_FORMAT_SRATIONAL) {
+ return null;
+ }
+ Rational[] array = (Rational[]) attribute.getValue(mExifByteOrder);
+ if (array.length != 3) {
+ return null;
+ }
+ return String.format("%02d:%02d:%02d",
+ (int) ((float) array[0].numerator / array[0].denominator),
+ (int) ((float) array[1].numerator / array[1].denominator),
+ (int) ((float) array[2].numerator / array[2].denominator));
+ }
+ try {
+ return Double.toString(attribute.getDoubleValue(mExifByteOrder));
+ } catch (NumberFormatException e) {
+ return null;
+ }
+ }
+ return null;
}
/**
* Returns the integer value of the specified tag. If there is no such tag
- * in the JPEG file or the value cannot be parsed as integer, return
+ * in the image file or the value cannot be parsed as integer, return
* <var>defaultValue</var>.
*
* @param tag the name of the tag.
* @param defaultValue the value to return if the tag is not available.
*/
public int getAttributeInt(String tag, int defaultValue) {
- String value = mAttributes.get(tag);
- if (value == null) return defaultValue;
+ ExifAttribute exifAttribute = getExifAttribute(tag);
+ if (exifAttribute == null) {
+ return defaultValue;
+ }
+
try {
- return Integer.valueOf(value);
- } catch (NumberFormatException ex) {
+ return exifAttribute.getIntValue(mExifByteOrder);
+ } catch (NumberFormatException e) {
return defaultValue;
}
}
/**
- * Returns the double value of the specified rational tag. If there is no
- * such tag in the JPEG file or the value cannot be parsed as double, return
- * <var>defaultValue</var>.
+ * Returns the double value of the tag that is specified as rational or contains a
+ * double-formatted value. If there is no such tag in the image file or the value cannot be
+ * parsed as double, return <var>defaultValue</var>.
*
* @param tag the name of the tag.
* @param defaultValue the value to return if the tag is not available.
*/
public double getAttributeDouble(String tag, double defaultValue) {
- String value = mAttributes.get(tag);
- if (value == null) return defaultValue;
+ ExifAttribute exifAttribute = getExifAttribute(tag);
+ if (exifAttribute == null) {
+ return defaultValue;
+ }
+
try {
- int index = value.indexOf("/");
- if (index == -1) return defaultValue;
- double denom = Double.parseDouble(value.substring(index + 1));
- if (denom == 0) return defaultValue;
- double num = Double.parseDouble(value.substring(0, index));
- return num / denom;
- } catch (NumberFormatException ex) {
+ return exifAttribute.getDoubleValue(mExifByteOrder);
+ } catch (NumberFormatException e) {
return defaultValue;
}
}
@@ -197,116 +1161,283 @@
* @param value the value of the tag.
*/
public void setAttribute(String tag, String value) {
- mAttributes.put(tag, value);
- }
-
- /**
- * Initialize mAttributes with the attributes from the file mFilename.
- *
- * mAttributes is a HashMap which stores the Exif attributes of the file.
- * The key is the standard tag name and the value is the tag's value: e.g.
- * Model -> Nikon. Numeric values are stored as strings.
- *
- * This function also initialize mHasThumbnail to indicate whether the
- * file has a thumbnail inside.
- */
- private void loadAttributes() throws IOException {
- // format of string passed from native C code:
- // "attrCnt attr1=valueLen value1attr2=value2Len value2..."
- // example:
- // "4 attrPtr ImageLength=4 1024Model=6 FooImageWidth=4 1280Make=3 FOO"
- mAttributes = new HashMap<String, String>();
-
- String attrStr;
- synchronized (sLock) {
- attrStr = getAttributesNative(mFilename);
- }
-
- // get count
- int ptr = attrStr.indexOf(' ');
- int count = Integer.parseInt(attrStr.substring(0, ptr));
- // skip past the space between item count and the rest of the attributes
- ++ptr;
-
- for (int i = 0; i < count; i++) {
- // extract the attribute name
- int equalPos = attrStr.indexOf('=', ptr);
- String attrName = attrStr.substring(ptr, equalPos);
- ptr = equalPos + 1; // skip past =
-
- // extract the attribute value length
- int lenPos = attrStr.indexOf(' ', ptr);
- int attrLen = Integer.parseInt(attrStr.substring(ptr, lenPos));
- ptr = lenPos + 1; // skip pas the space
-
- // extract the attribute value
- String attrValue = attrStr.substring(ptr, ptr + attrLen);
- ptr += attrLen;
-
- if (attrName.equals("hasThumbnail")) {
- mHasThumbnail = attrValue.equalsIgnoreCase("true");
+ // Convert the given value to rational values for backwards compatibility.
+ if (value != null && sTagSetForCompatibility.contains(tag)) {
+ if (tag.equals(TAG_GPS_TIMESTAMP)) {
+ Matcher m = sGpsTimestampPattern.matcher(value);
+ if (!m.find()) {
+ Log.w(TAG, "Invalid value for " + tag + " : " + value);
+ return;
+ }
+ value = Integer.parseInt(m.group(1)) + "/1," + Integer.parseInt(m.group(2)) + "/1,"
+ + Integer.parseInt(m.group(3)) + "/1";
} else {
- mAttributes.put(attrName, attrValue);
+ try {
+ double doubleValue = Double.parseDouble(value);
+ value = (long) (doubleValue * 10000L) + "/10000";
+ } catch (NumberFormatException e) {
+ Log.w(TAG, "Invalid value for " + tag + " : " + value);
+ return;
+ }
}
}
- }
- /**
- * Save the tag data into the JPEG file. This is expensive because it involves
- * copying all the JPG data from one file to another and deleting the old file
- * and renaming the other. It's best to use {@link #setAttribute(String,String)}
- * to set all attributes to write and make a single call rather than multiple
- * calls for each attribute.
- */
- public void saveAttributes() throws IOException {
- // format of string passed to native C code:
- // "attrCnt attr1=valueLen value1attr2=value2Len value2..."
- // example:
- // "4 attrPtr ImageLength=4 1024Model=6 FooImageWidth=4 1280Make=3 FOO"
- StringBuilder sb = new StringBuilder();
- int size = mAttributes.size();
- if (mAttributes.containsKey("hasThumbnail")) {
- --size;
- }
- sb.append(size + " ");
- for (Map.Entry<String, String> iter : mAttributes.entrySet()) {
- String key = iter.getKey();
- if (key.equals("hasThumbnail")) {
- // this is a fake attribute not saved as an exif tag
+ for (int i = 0 ; i < EXIF_TAGS.length; ++i) {
+ if (i == IFD_THUMBNAIL_HINT && !mHasThumbnail) {
continue;
}
- String val = iter.getValue();
- sb.append(key + "=");
- sb.append(val.length() + " ");
- sb.append(val);
- }
- String s = sb.toString();
- synchronized (sLock) {
- saveAttributesNative(mFilename, s);
- commitChangesNative(mFilename);
+ final Object obj = sExifTagMapsForWriting[i].get(tag);
+ if (obj != null) {
+ if (value == null) {
+ mAttributes[i].remove(tag);
+ continue;
+ }
+ final ExifTag exifTag = (ExifTag) obj;
+ Pair<Integer, Integer> guess = guessDataFormat(value);
+ int dataFormat;
+ if (exifTag.primaryFormat == guess.first || exifTag.primaryFormat == guess.second) {
+ dataFormat = exifTag.primaryFormat;
+ } else if (exifTag.secondaryFormat != -1 && (exifTag.secondaryFormat == guess.first
+ || exifTag.secondaryFormat == guess.second)) {
+ dataFormat = exifTag.secondaryFormat;
+ } else if (exifTag.primaryFormat == IFD_FORMAT_BYTE
+ || exifTag.primaryFormat == IFD_FORMAT_UNDEFINED
+ || exifTag.primaryFormat == IFD_FORMAT_STRING) {
+ dataFormat = exifTag.primaryFormat;
+ } else {
+ Log.w(TAG, "Given tag (" + tag + ") value didn't match with one of expected "
+ + "formats: " + IFD_FORMAT_NAMES[exifTag.primaryFormat]
+ + (exifTag.secondaryFormat == -1 ? "" : ", "
+ + IFD_FORMAT_NAMES[exifTag.secondaryFormat]) + " (guess: "
+ + IFD_FORMAT_NAMES[guess.first] + (guess.second == -1 ? "" : ", "
+ + IFD_FORMAT_NAMES[guess.second]) + ")");
+ continue;
+ }
+ switch (dataFormat) {
+ case IFD_FORMAT_BYTE: {
+ mAttributes[i].put(tag, ExifAttribute.createByte(value));
+ break;
+ }
+ case IFD_FORMAT_UNDEFINED:
+ case IFD_FORMAT_STRING: {
+ mAttributes[i].put(tag, ExifAttribute.createString(value));
+ break;
+ }
+ case IFD_FORMAT_USHORT: {
+ final String[] values = value.split(",");
+ final int[] intArray = new int[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ intArray[j] = Integer.parseInt(values[j]);
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createUShort(intArray, mExifByteOrder));
+ break;
+ }
+ case IFD_FORMAT_SLONG: {
+ final String[] values = value.split(",");
+ final int[] intArray = new int[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ intArray[j] = Integer.parseInt(values[j]);
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createSLong(intArray, mExifByteOrder));
+ break;
+ }
+ case IFD_FORMAT_ULONG: {
+ final String[] values = value.split(",");
+ final long[] longArray = new long[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ longArray[j] = Long.parseLong(values[j]);
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createULong(longArray, mExifByteOrder));
+ break;
+ }
+ case IFD_FORMAT_URATIONAL: {
+ final String[] values = value.split(",");
+ final Rational[] rationalArray = new Rational[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ final String[] numbers = values[j].split("/");
+ rationalArray[j] = new Rational(Long.parseLong(numbers[0]),
+ Long.parseLong(numbers[1]));
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createURational(rationalArray, mExifByteOrder));
+ break;
+ }
+ case IFD_FORMAT_SRATIONAL: {
+ final String[] values = value.split(",");
+ final Rational[] rationalArray = new Rational[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ final String[] numbers = values[j].split("/");
+ rationalArray[j] = new Rational(Long.parseLong(numbers[0]),
+ Long.parseLong(numbers[1]));
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createSRational(rationalArray, mExifByteOrder));
+ break;
+ }
+ case IFD_FORMAT_DOUBLE: {
+ final String[] values = value.split(",");
+ final double[] doubleArray = new double[values.length];
+ for (int j = 0; j < values.length; ++j) {
+ doubleArray[j] = Double.parseDouble(values[j]);
+ }
+ mAttributes[i].put(tag,
+ ExifAttribute.createDouble(doubleArray, mExifByteOrder));
+ break;
+ }
+ default:
+ Log.w(TAG, "Data format isn't one of expected formats: " + dataFormat);
+ continue;
+ }
+ }
}
}
/**
- * Returns true if the JPEG file has a thumbnail.
+ * Update the values of the tags in the tag groups if any value for the tag already was stored.
+ *
+ * @param tag the name of the tag.
+ * @param value the value of the tag in a form of {@link ExifAttribute}.
+ * @return Returns {@code true} if updating is placed.
+ */
+ private boolean updateAttribute(String tag, ExifAttribute value) {
+ boolean updated = false;
+ for (int i = 0 ; i < EXIF_TAGS.length; ++i) {
+ if (mAttributes[i].containsKey(tag)) {
+ mAttributes[i].put(tag, value);
+ updated = true;
+ }
+ }
+ return updated;
+ }
+
+ /**
+ * Remove any values of the specified tag.
+ *
+ * @param tag the name of the tag.
+ */
+ private void removeAttribute(String tag) {
+ for (int i = 0 ; i < EXIF_TAGS.length; ++i) {
+ mAttributes[i].remove(tag);
+ }
+ }
+
+ /**
+ * This function decides which parser to read the image data according to the given input stream
+ * type and the content of the input stream. In each case, it reads the first three bytes to
+ * determine whether the image data format is JPEG or not.
+ */
+ private void loadAttributes() throws IOException {
+ try {
+ InputStream in = new FileInputStream(mFilename);
+ // Initialize mAttributes.
+ for (int i = 0; i < EXIF_TAGS.length; ++i) {
+ mAttributes[i] = new HashMap();
+ }
+ getJpegAttributes(in);
+ } catch (IOException e) {
+ // Ignore exceptions in order to keep the compatibility with the old versions of
+ // ExifInterface.
+ Log.w(TAG, "Invalid image.", e);
+ } finally {
+ addDefaultValuesForCompatibility();
+ if (DEBUG) {
+ printAttributes();
+ }
+ }
+ }
+
+ // Prints out attributes for debugging.
+ private void printAttributes() {
+ for (int i = 0; i < mAttributes.length; ++i) {
+ Log.d(TAG, "The size of tag group[" + i + "]: " + mAttributes[i].size());
+ for (Map.Entry entry : (Set<Map.Entry>) mAttributes[i].entrySet()) {
+ final ExifAttribute tagValue = (ExifAttribute) entry.getValue();
+ Log.d(TAG, "tagName: " + entry.getKey() + ", tagType: " + tagValue.toString()
+ + ", tagValue: '" + tagValue.getStringValue(mExifByteOrder) + "'");
+ }
+ }
+ }
+
+ /**
+ * Save the tag data into the original image file. This is expensive because it involves
+ * copying all the data from one file to another and deleting the old file and renaming the
+ * other. It's best to use {@link #setAttribute(String,String)} to set all attributes to write
+ * and make a single call rather than multiple calls for each attribute.
+ */
+ public void saveAttributes() throws IOException {
+ // Keep the thumbnail in memory
+ mThumbnailBytes = getThumbnail();
+
+ File tempFile = null;
+ // Move the original file to temporary file.
+ tempFile = new File(mFilename + ".tmp");
+ File originalFile = new File(mFilename);
+ if (!originalFile.renameTo(tempFile)) {
+ throw new IOException("Could'nt rename to " + tempFile.getAbsolutePath());
+ }
+
+ FileInputStream in = null;
+ FileOutputStream out = null;
+ try {
+ // Save the new file.
+ in = new FileInputStream(tempFile);
+ out = new FileOutputStream(mFilename);
+ saveJpegAttributes(in, out);
+ } finally {
+ IoUtils.closeQuietly(in);
+ IoUtils.closeQuietly(out);
+ tempFile.delete();
+ }
+
+ // Discard the thumbnail in memory
+ mThumbnailBytes = null;
+ }
+
+ /**
+ * Returns true if the image file has a thumbnail.
*/
public boolean hasThumbnail() {
return mHasThumbnail;
}
/**
- * Returns the thumbnail inside the JPEG file, or {@code null} if there is no thumbnail.
+ * Returns the thumbnail inside the image file, or {@code null} if there is no thumbnail.
* The returned data is in JPEG format and can be decoded using
* {@link android.graphics.BitmapFactory#decodeByteArray(byte[],int,int)}
*/
public byte[] getThumbnail() {
- synchronized (sLock) {
- return getThumbnailNative(mFilename);
+ if (!mHasThumbnail) {
+ return null;
}
+ if (mThumbnailBytes != null) {
+ return mThumbnailBytes;
+ }
+
+ // Read the thumbnail.
+ FileInputStream in = null;
+ try {
+ in = new FileInputStream(mFilename);
+ if (in.skip(mThumbnailOffset) != mThumbnailOffset) {
+ throw new IOException("Corrupted image");
+ }
+ byte[] buffer = new byte[mThumbnailLength];
+ if (in.read(buffer) != mThumbnailLength) {
+ throw new IOException("Corrupted image");
+ }
+ return buffer;
+ } catch (IOException e) {
+ // Couldn't get a thumbnail image.
+ } finally {
+ IoUtils.closeQuietly(in);
+ }
+ return null;
}
/**
- * Returns the offset and length of thumbnail inside the JPEG file, or
+ * Returns the offset and length of thumbnail inside the image file, or
* {@code null} if there is no thumbnail.
*
* @return two-element array, the offset in the first value, and length in
@@ -314,9 +1445,15 @@
* @hide
*/
public long[] getThumbnailRange() {
- synchronized (sLock) {
- return getThumbnailRangeNative(mFilename);
+ if (!mHasThumbnail) {
+ return null;
}
+
+ long[] range = new long[2];
+ range[0] = mThumbnailOffset;
+ range[1] = mThumbnailLength;
+
+ return range;
}
/**
@@ -325,10 +1462,10 @@
* Exif tags are not available.
*/
public boolean getLatLong(float output[]) {
- String latValue = mAttributes.get(ExifInterface.TAG_GPS_LATITUDE);
- String latRef = mAttributes.get(ExifInterface.TAG_GPS_LATITUDE_REF);
- String lngValue = mAttributes.get(ExifInterface.TAG_GPS_LONGITUDE);
- String lngRef = mAttributes.get(ExifInterface.TAG_GPS_LONGITUDE_REF);
+ String latValue = getAttribute(TAG_GPS_LATITUDE);
+ String latRef = getAttribute(TAG_GPS_LATITUDE_REF);
+ String lngValue = getAttribute(TAG_GPS_LONGITUDE);
+ String lngRef = getAttribute(TAG_GPS_LONGITUDE_REF);
if (latValue != null && latRef != null && lngValue != null && lngRef != null) {
try {
@@ -354,7 +1491,7 @@
int ref = getAttributeInt(TAG_GPS_ALTITUDE_REF, -1);
if (altitude >= 0 && ref >= 0) {
- return (double) (altitude * ((ref == 1) ? -1 : 1));
+ return (altitude * ((ref == 1) ? -1 : 1));
} else {
return defaultValue;
}
@@ -366,8 +1503,9 @@
* @hide
*/
public long getDateTime() {
- String dateTimeString = mAttributes.get(TAG_DATETIME);
- if (dateTimeString == null) return -1;
+ String dateTimeString = getAttribute(TAG_DATETIME);
+ if (dateTimeString == null
+ || !sNonZeroTimePattern.matcher(dateTimeString).matches()) return -1;
ParsePosition pos = new ParsePosition(0);
try {
@@ -377,7 +1515,7 @@
if (datetime == null) return -1;
long msecs = datetime.getTime();
- String subSecs = mAttributes.get(TAG_SUBSECTIME);
+ String subSecs = getAttribute(TAG_SUBSEC_TIME);
if (subSecs != null) {
try {
long sub = Long.valueOf(subSecs);
@@ -386,10 +1524,11 @@
}
msecs += sub;
} catch (NumberFormatException e) {
+ // Ignored
}
}
return msecs;
- } catch (IllegalArgumentException ex) {
+ } catch (IllegalArgumentException e) {
return -1;
}
}
@@ -400,9 +1539,13 @@
* @hide
*/
public long getGpsDateTime() {
- String date = mAttributes.get(TAG_GPS_DATESTAMP);
- String time = mAttributes.get(TAG_GPS_TIMESTAMP);
- if (date == null || time == null) return -1;
+ String date = getAttribute(TAG_GPS_DATESTAMP);
+ String time = getAttribute(TAG_GPS_TIMESTAMP);
+ if (date == null || time == null
+ || (!sNonZeroTimePattern.matcher(date).matches()
+ && !sNonZeroTimePattern.matcher(time).matches())) {
+ return -1;
+ }
String dateTimeString = date + ' ' + time;
@@ -411,13 +1554,12 @@
Date datetime = sFormatter.parse(dateTimeString, pos);
if (datetime == null) return -1;
return datetime.getTime();
- } catch (IllegalArgumentException ex) {
+ } catch (IllegalArgumentException e) {
return -1;
}
}
- private static float convertRationalLatLonToFloat(
- String rationalString, String ref) {
+ private static float convertRationalLatLonToFloat(String rationalString, String ref) {
try {
String [] parts = rationalString.split(",");
@@ -439,26 +1581,949 @@
return (float) -result;
}
return (float) result;
- } catch (NumberFormatException e) {
- // Some of the nubmers are not valid
- throw new IllegalArgumentException();
- } catch (ArrayIndexOutOfBoundsException e) {
- // Some of the rational does not follow the correct format
+ } catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
+ // Not valid
throw new IllegalArgumentException();
}
}
- private native boolean appendThumbnailNative(String fileName,
- String thumbnailFileName);
+ // Loads EXIF attributes from a JPEG input stream.
+ private void getJpegAttributes(InputStream inputStream) throws IOException {
+ // See JPEG File Interchange Format Specification page 5.
+ if (DEBUG) {
+ Log.d(TAG, "getJpegAttributes starting with: " + inputStream);
+ }
+ DataInputStream dataInputStream = new DataInputStream(inputStream);
+ byte marker;
+ int bytesRead = 0;
+ if ((marker = dataInputStream.readByte()) != MARKER) {
+ throw new IOException("Invalid marker: " + Integer.toHexString(marker & 0xff));
+ }
+ ++bytesRead;
+ if (dataInputStream.readByte() != MARKER_SOI) {
+ throw new IOException("Invalid marker: " + Integer.toHexString(marker & 0xff));
+ }
+ ++bytesRead;
+ while (true) {
+ marker = dataInputStream.readByte();
+ if (marker != MARKER) {
+ throw new IOException("Invalid marker:" + Integer.toHexString(marker & 0xff));
+ }
+ ++bytesRead;
+ marker = dataInputStream.readByte();
+ if (DEBUG) {
+ Log.d(TAG, "Found JPEG segment indicator: " + Integer.toHexString(marker & 0xff));
+ }
+ ++bytesRead;
- private native void saveAttributesNative(String fileName,
- String compressedAttributes);
+ // EOI indicates the end of an image and in case of SOS, JPEG image stream starts and
+ // the image data will terminate right after.
+ if (marker == MARKER_EOI || marker == MARKER_SOS) {
+ break;
+ }
+ int length = dataInputStream.readUnsignedShort() - 2;
+ bytesRead += 2;
+ if (DEBUG) {
+ Log.d(TAG, "JPEG segment: " + Integer.toHexString(marker & 0xff) + " (length: "
+ + (length + 2) + ")");
+ }
+ if (length < 0) {
+ throw new IOException("Invalid length");
+ }
+ switch (marker) {
+ case MARKER_APP1: {
+ if (DEBUG) {
+ Log.d(TAG, "MARKER_APP1");
+ }
+ if (length < 6) {
+ // Skip if it's not an EXIF APP1 segment.
+ break;
+ }
+ byte[] identifier = new byte[6];
+ if (inputStream.read(identifier) != 6) {
+ throw new IOException("Invalid exif");
+ }
+ bytesRead += 6;
+ length -= 6;
+ if (!Arrays.equals(identifier, IDENTIFIER_EXIF_APP1)) {
+ // Skip if it's not an EXIF APP1 segment.
+ break;
+ }
+ if (length <= 0) {
+ throw new IOException("Invalid exif");
+ }
+ if (DEBUG) {
+ Log.d(TAG, "readExifSegment with a byte array (length: " + length + ")");
+ }
+ byte[] bytes = new byte[length];
+ if (dataInputStream.read(bytes) != length) {
+ throw new IOException("Invalid exif");
+ }
+ readExifSegment(bytes, bytesRead);
+ bytesRead += length;
+ length = 0;
+ break;
+ }
- private native String getAttributesNative(String fileName);
+ case MARKER_COM: {
+ byte[] bytes = new byte[length];
+ if (dataInputStream.read(bytes) != length) {
+ throw new IOException("Invalid exif");
+ }
+ length = 0;
+ if (getAttribute(TAG_USER_COMMENT) == null) {
+ mAttributes[IFD_EXIF_HINT].put(TAG_USER_COMMENT, ExifAttribute.createString(
+ new String(bytes, ASCII)));
+ }
+ break;
+ }
- private native void commitChangesNative(String fileName);
+ case MARKER_SOF0:
+ case MARKER_SOF1:
+ case MARKER_SOF2:
+ case MARKER_SOF3:
+ case MARKER_SOF5:
+ case MARKER_SOF6:
+ case MARKER_SOF7:
+ case MARKER_SOF9:
+ case MARKER_SOF10:
+ case MARKER_SOF11:
+ case MARKER_SOF13:
+ case MARKER_SOF14:
+ case MARKER_SOF15: {
+ if (dataInputStream.skipBytes(1) != 1) {
+ throw new IOException("Invalid SOFx");
+ }
+ mAttributes[IFD_TIFF_HINT].put(TAG_IMAGE_LENGTH, ExifAttribute.createULong(
+ dataInputStream.readUnsignedShort(), mExifByteOrder));
+ mAttributes[IFD_TIFF_HINT].put(TAG_IMAGE_WIDTH, ExifAttribute.createULong(
+ dataInputStream.readUnsignedShort(), mExifByteOrder));
+ length -= 5;
+ break;
+ }
- private native byte[] getThumbnailNative(String fileName);
+ default: {
+ break;
+ }
+ }
+ if (length < 0) {
+ throw new IOException("Invalid length");
+ }
+ if (dataInputStream.skipBytes(length) != length) {
+ throw new IOException("Invalid JPEG segment");
+ }
+ bytesRead += length;
+ }
+ }
- private native long[] getThumbnailRangeNative(String fileName);
+ // Stores a new JPEG image with EXIF attributes into a given output stream.
+ private void saveJpegAttributes(InputStream inputStream, OutputStream outputStream)
+ throws IOException {
+ // See JPEG File Interchange Format Specification page 5.
+ if (DEBUG) {
+ Log.d(TAG, "saveJpegAttributes starting with (inputStream: " + inputStream
+ + ", outputStream: " + outputStream + ")");
+ }
+ DataInputStream dataInputStream = new DataInputStream(inputStream);
+ ByteOrderAwarenessDataOutputStream dataOutputStream =
+ new ByteOrderAwarenessDataOutputStream(outputStream, ByteOrder.BIG_ENDIAN);
+ if (dataInputStream.readByte() != MARKER) {
+ throw new IOException("Invalid marker");
+ }
+ dataOutputStream.writeByte(MARKER);
+ if (dataInputStream.readByte() != MARKER_SOI) {
+ throw new IOException("Invalid marker");
+ }
+ dataOutputStream.writeByte(MARKER_SOI);
+
+ // Write EXIF APP1 segment
+ dataOutputStream.writeByte(MARKER);
+ dataOutputStream.writeByte(MARKER_APP1);
+ writeExifSegment(dataOutputStream, 6);
+
+ byte[] bytes = new byte[4096];
+
+ while (true) {
+ byte marker = dataInputStream.readByte();
+ if (marker != MARKER) {
+ throw new IOException("Invalid marker");
+ }
+ marker = dataInputStream.readByte();
+ switch (marker) {
+ case MARKER_APP1: {
+ int length = dataInputStream.readUnsignedShort() - 2;
+ if (length < 0) {
+ throw new IOException("Invalid length");
+ }
+ byte[] identifier = new byte[6];
+ if (length >= 6) {
+ if (dataInputStream.read(identifier) != 6) {
+ throw new IOException("Invalid exif");
+ }
+ if (Arrays.equals(identifier, IDENTIFIER_EXIF_APP1)) {
+ // Skip the original EXIF APP1 segment.
+ if (dataInputStream.skip(length - 6) != length - 6) {
+ throw new IOException("Invalid length");
+ }
+ break;
+ }
+ }
+ // Copy non-EXIF APP1 segment.
+ dataOutputStream.writeByte(MARKER);
+ dataOutputStream.writeByte(marker);
+ dataOutputStream.writeUnsignedShort(length + 2);
+ if (length >= 6) {
+ length -= 6;
+ dataOutputStream.write(identifier);
+ }
+ int read;
+ while (length > 0 && (read = dataInputStream.read(
+ bytes, 0, Math.min(length, bytes.length))) >= 0) {
+ dataOutputStream.write(bytes, 0, read);
+ length -= read;
+ }
+ break;
+ }
+ case MARKER_EOI:
+ case MARKER_SOS: {
+ dataOutputStream.writeByte(MARKER);
+ dataOutputStream.writeByte(marker);
+ // Copy all the remaining data
+ Streams.copy(dataInputStream, dataOutputStream);
+ return;
+ }
+ default: {
+ // Copy JPEG segment
+ dataOutputStream.writeByte(MARKER);
+ dataOutputStream.writeByte(marker);
+ int length = dataInputStream.readUnsignedShort();
+ dataOutputStream.writeUnsignedShort(length);
+ length -= 2;
+ if (length < 0) {
+ throw new IOException("Invalid length");
+ }
+ int read;
+ while (length > 0 && (read = dataInputStream.read(
+ bytes, 0, Math.min(length, bytes.length))) >= 0) {
+ dataOutputStream.write(bytes, 0, read);
+ length -= read;
+ }
+ break;
+ }
+ }
+ }
+ }
+
+ // Reads the given EXIF byte area and save its tag data into attributes.
+ private void readExifSegment(byte[] exifBytes, int exifOffsetFromBeginning) throws IOException {
+ // Parse TIFF Headers. See JEITA CP-3451C Table 1. page 10.
+ ByteOrderAwarenessDataInputStream dataInputStream =
+ new ByteOrderAwarenessDataInputStream(exifBytes);
+
+ // Read byte align
+ short byteOrder = dataInputStream.readShort();
+ switch (byteOrder) {
+ case BYTE_ALIGN_II:
+ if (DEBUG) {
+ Log.d(TAG, "readExifSegment: Byte Align II");
+ }
+ mExifByteOrder = ByteOrder.LITTLE_ENDIAN;
+ break;
+ case BYTE_ALIGN_MM:
+ if (DEBUG) {
+ Log.d(TAG, "readExifSegment: Byte Align MM");
+ }
+ mExifByteOrder = ByteOrder.BIG_ENDIAN;
+ break;
+ default:
+ throw new IOException("Invalid byte order: " + Integer.toHexString(byteOrder));
+ }
+
+ // Set byte order.
+ dataInputStream.setByteOrder(mExifByteOrder);
+
+ int startCode = dataInputStream.readUnsignedShort();
+ if (startCode != 0x2a) {
+ throw new IOException("Invalid exif start: " + Integer.toHexString(startCode));
+ }
+
+ // Read first ifd offset
+ long firstIfdOffset = dataInputStream.readUnsignedInt();
+ if (firstIfdOffset < 8 || firstIfdOffset >= exifBytes.length) {
+ throw new IOException("Invalid first Ifd offset: " + firstIfdOffset);
+ }
+ firstIfdOffset -= 8;
+ if (firstIfdOffset > 0) {
+ if (dataInputStream.skip(firstIfdOffset) != firstIfdOffset) {
+ throw new IOException("Couldn't jump to first Ifd: " + firstIfdOffset);
+ }
+ }
+
+ // Read primary image TIFF image file directory.
+ readImageFileDirectory(dataInputStream, IFD_TIFF_HINT);
+
+ // Process thumbnail.
+ String jpegInterchangeFormatString = getAttribute(JPEG_INTERCHANGE_FORMAT_TAG.name);
+ String jpegInterchangeFormatLengthString =
+ getAttribute(JPEG_INTERCHANGE_FORMAT_LENGTH_TAG.name);
+ if (jpegInterchangeFormatString != null && jpegInterchangeFormatLengthString != null) {
+ try {
+ int jpegInterchangeFormat = Integer.parseInt(jpegInterchangeFormatString);
+ int jpegInterchangeFormatLength = Integer
+ .parseInt(jpegInterchangeFormatLengthString);
+ // The following code limits the size of thumbnail size not to overflow EXIF data area.
+ jpegInterchangeFormatLength = Math.min(jpegInterchangeFormat
+ + jpegInterchangeFormatLength, exifBytes.length) - jpegInterchangeFormat;
+ if (jpegInterchangeFormat > 0 && jpegInterchangeFormatLength > 0) {
+ mHasThumbnail = true;
+ mThumbnailOffset = exifOffsetFromBeginning + jpegInterchangeFormat;
+ mThumbnailLength = jpegInterchangeFormatLength;
+ }
+ } catch (NumberFormatException e) {
+ // Ignored the corrupted image.
+ }
+ }
+ }
+
+ private void addDefaultValuesForCompatibility() {
+ // The value of DATETIME tag has the same value of DATETIME_ORIGINAL tag.
+ String valueOfDateTimeOriginal = getAttribute(TAG_DATETIME_ORIGINAL);
+ if (valueOfDateTimeOriginal != null) {
+ mAttributes[IFD_TIFF_HINT].put(TAG_DATETIME,
+ ExifAttribute.createString(valueOfDateTimeOriginal));
+ }
+
+ // Add the default value.
+ if (getAttribute(TAG_IMAGE_WIDTH) == null) {
+ mAttributes[IFD_TIFF_HINT].put(TAG_IMAGE_WIDTH,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (getAttribute(TAG_IMAGE_LENGTH) == null) {
+ mAttributes[IFD_TIFF_HINT].put(TAG_IMAGE_LENGTH,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (getAttribute(TAG_ORIENTATION) == null) {
+ mAttributes[IFD_TIFF_HINT].put(TAG_ORIENTATION,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (getAttribute(TAG_LIGHT_SOURCE) == null) {
+ mAttributes[IFD_EXIF_HINT].put(TAG_LIGHT_SOURCE,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ }
+
+ // Reads image file directory, which is a tag group in EXIF.
+ private void readImageFileDirectory(ByteOrderAwarenessDataInputStream dataInputStream, int hint)
+ throws IOException {
+ if (dataInputStream.peek() + 2 > dataInputStream.mLength) {
+ // Return if there is no data from the offset.
+ return;
+ }
+ // See JEITA CP-3451 Figure 5. page 9.
+ short numberOfDirectoryEntry = dataInputStream.readShort();
+ if (dataInputStream.peek() + 12 * numberOfDirectoryEntry > dataInputStream.mLength) {
+ // Return if the size of entries is too big.
+ return;
+ }
+
+ if (DEBUG) {
+ Log.d(TAG, "numberOfDirectoryEntry: " + numberOfDirectoryEntry);
+ }
+
+ for (short i = 0; i < numberOfDirectoryEntry; ++i) {
+ int tagNumber = dataInputStream.readUnsignedShort();
+ int dataFormat = dataInputStream.readUnsignedShort();
+ int numberOfComponents = dataInputStream.readInt();
+ long nextEntryOffset = dataInputStream.peek() + 4; // next four bytes is for data
+ // offset or value.
+ // Look up a corresponding tag from tag number
+ final ExifTag tag = (ExifTag) sExifTagMapsForReading[hint].get(tagNumber);
+
+ if (DEBUG) {
+ Log.d(TAG, String.format("hint: %d, tagNumber: %d, tagName: %s, dataFormat: %d, " +
+ "numberOfComponents: %d", hint, tagNumber, tag != null ? tag.name : null,
+ dataFormat, numberOfComponents));
+ }
+
+ if (tag == null || dataFormat <= 0 ||
+ dataFormat >= IFD_FORMAT_BYTES_PER_FORMAT.length) {
+ // Skip if the parsed tag number is not defined or invalid data format.
+ if (tag == null) {
+ Log.w(TAG, "Skip the tag entry since tag number is not defined: " + tagNumber);
+ } else {
+ Log.w(TAG, "Skip the tag entry since data format is invalid: " + dataFormat);
+ }
+ dataInputStream.seek(nextEntryOffset);
+ continue;
+ }
+
+ // Read a value from data field or seek to the value offset which is stored in data
+ // field if the size of the entry value is bigger than 4.
+ int byteCount = numberOfComponents * IFD_FORMAT_BYTES_PER_FORMAT[dataFormat];
+ if (byteCount > 4) {
+ long offset = dataInputStream.readUnsignedInt();
+ if (DEBUG) {
+ Log.d(TAG, "seek to data offset: " + offset);
+ }
+ if (offset + byteCount <= dataInputStream.mLength) {
+ dataInputStream.seek(offset);
+ } else {
+ // Skip if invalid data offset.
+ Log.w(TAG, "Skip the tag entry since data offset is invalid: " + offset);
+ dataInputStream.seek(nextEntryOffset);
+ continue;
+ }
+ }
+
+ // Recursively parse IFD when a IFD pointer tag appears.
+ int innerIfdHint = getIfdHintFromTagNumber(tagNumber);
+ if (DEBUG) {
+ Log.d(TAG, "innerIfdHint: " + innerIfdHint + " byteCount: " + byteCount);
+ }
+
+ if (innerIfdHint >= 0) {
+ long offset = -1L;
+ // Get offset from data field
+ switch (dataFormat) {
+ case IFD_FORMAT_USHORT: {
+ offset = dataInputStream.readUnsignedShort();
+ break;
+ }
+ case IFD_FORMAT_SSHORT: {
+ offset = dataInputStream.readShort();
+ break;
+ }
+ case IFD_FORMAT_ULONG: {
+ offset = dataInputStream.readUnsignedInt();
+ break;
+ }
+ case IFD_FORMAT_SLONG: {
+ offset = dataInputStream.readInt();
+ break;
+ }
+ default: {
+ // Nothing to do
+ break;
+ }
+ }
+ if (DEBUG) {
+ Log.d(TAG, String.format("Offset: %d, tagName: %s", offset, tag.name));
+ }
+ if (offset > 0L && offset < dataInputStream.mLength) {
+ dataInputStream.seek(offset);
+ readImageFileDirectory(dataInputStream, innerIfdHint);
+ } else {
+ Log.w(TAG, "Skip jump into the IFD since its offset is invalid: " + offset);
+ }
+
+ dataInputStream.seek(nextEntryOffset);
+ continue;
+ }
+
+ byte[] bytes = new byte[numberOfComponents * IFD_FORMAT_BYTES_PER_FORMAT[dataFormat]];
+ dataInputStream.readFully(bytes);
+ mAttributes[hint].put(
+ tag.name, new ExifAttribute(dataFormat, numberOfComponents, bytes));
+ if (dataInputStream.peek() != nextEntryOffset) {
+ dataInputStream.seek(nextEntryOffset);
+ }
+ }
+
+ if (dataInputStream.peek() + 4 <= dataInputStream.mLength) {
+ long nextIfdOffset = dataInputStream.readUnsignedInt();
+ if (DEBUG) {
+ Log.d(TAG, String.format("nextIfdOffset: %d", nextIfdOffset));
+ }
+ // The next IFD offset needs to be bigger than 8
+ // since the first IFD offset is at least 8.
+ if (nextIfdOffset > 8 && nextIfdOffset < dataInputStream.mLength) {
+ dataInputStream.seek(nextIfdOffset);
+ readImageFileDirectory(dataInputStream, IFD_THUMBNAIL_HINT);
+ }
+ }
+ }
+
+ // Gets the corresponding IFD group index of the given tag number for writing Exif Tags.
+ private static int getIfdHintFromTagNumber(int tagNumber) {
+ for (int i = 0; i < IFD_POINTER_TAG_HINTS.length; ++i) {
+ if (IFD_POINTER_TAGS[i].number == tagNumber) {
+ return IFD_POINTER_TAG_HINTS[i];
+ }
+ }
+ return -1;
+ }
+
+ // Writes an Exif segment into the given output stream.
+ private int writeExifSegment(ByteOrderAwarenessDataOutputStream dataOutputStream,
+ int exifOffsetFromBeginning) throws IOException {
+ // The following variables are for calculating each IFD tag group size in bytes.
+ int[] ifdOffsets = new int[EXIF_TAGS.length];
+ int[] ifdDataSizes = new int[EXIF_TAGS.length];
+
+ // Remove IFD pointer tags (we'll re-add it later.)
+ for (ExifTag tag : IFD_POINTER_TAGS) {
+ removeAttribute(tag.name);
+ }
+ // Remove old thumbnail data
+ removeAttribute(JPEG_INTERCHANGE_FORMAT_TAG.name);
+ removeAttribute(JPEG_INTERCHANGE_FORMAT_LENGTH_TAG.name);
+
+ // Remove null value tags.
+ for (int hint = 0; hint < EXIF_TAGS.length; ++hint) {
+ for (Object obj : mAttributes[hint].entrySet().toArray()) {
+ final Map.Entry entry = (Map.Entry) obj;
+ if (entry.getValue() == null) {
+ mAttributes[hint].remove(entry.getKey());
+ }
+ }
+ }
+
+ // Add IFD pointer tags. The next offset of primary image TIFF IFD will have thumbnail IFD
+ // offset when there is one or more tags in the thumbnail IFD.
+ if (!mAttributes[IFD_INTEROPERABILITY_HINT].isEmpty()) {
+ mAttributes[IFD_EXIF_HINT].put(IFD_POINTER_TAGS[2].name,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (!mAttributes[IFD_EXIF_HINT].isEmpty()) {
+ mAttributes[IFD_TIFF_HINT].put(IFD_POINTER_TAGS[0].name,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (!mAttributes[IFD_GPS_HINT].isEmpty()) {
+ mAttributes[IFD_TIFF_HINT].put(IFD_POINTER_TAGS[1].name,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ }
+ if (mHasThumbnail) {
+ mAttributes[IFD_TIFF_HINT].put(JPEG_INTERCHANGE_FORMAT_TAG.name,
+ ExifAttribute.createULong(0, mExifByteOrder));
+ mAttributes[IFD_TIFF_HINT].put(JPEG_INTERCHANGE_FORMAT_LENGTH_TAG.name,
+ ExifAttribute.createULong(mThumbnailLength, mExifByteOrder));
+ }
+
+ // Calculate IFD group data area sizes. IFD group data area is assigned to save the entry
+ // value which has a bigger size than 4 bytes.
+ for (int i = 0; i < EXIF_TAGS.length; ++i) {
+ int sum = 0;
+ for (Map.Entry entry : (Set<Map.Entry>) mAttributes[i].entrySet()) {
+ final ExifAttribute exifAttribute = (ExifAttribute) entry.getValue();
+ final int size = exifAttribute.size();
+ if (size > 4) {
+ sum += size;
+ }
+ }
+ ifdDataSizes[i] += sum;
+ }
+
+ // Calculate IFD offsets.
+ int position = 8;
+ for (int hint = 0; hint < EXIF_TAGS.length; ++hint) {
+ if (!mAttributes[hint].isEmpty()) {
+ ifdOffsets[hint] = position;
+ position += 2 + mAttributes[hint].size() * 12 + 4 + ifdDataSizes[hint];
+ }
+ }
+ if (mHasThumbnail) {
+ int thumbnailOffset = position;
+ mAttributes[IFD_TIFF_HINT].put(JPEG_INTERCHANGE_FORMAT_TAG.name,
+ ExifAttribute.createULong(thumbnailOffset, mExifByteOrder));
+ mThumbnailOffset = exifOffsetFromBeginning + thumbnailOffset;
+ position += mThumbnailLength;
+ }
+
+ // Calculate the total size
+ int totalSize = position + 8; // eight bytes is for header part.
+ if (DEBUG) {
+ Log.d(TAG, "totalSize length: " + totalSize);
+ for (int i = 0; i < EXIF_TAGS.length; ++i) {
+ Log.d(TAG, String.format("index: %d, offsets: %d, tag count: %d, data sizes: %d",
+ i, ifdOffsets[i], mAttributes[i].size(), ifdDataSizes[i]));
+ }
+ }
+
+ // Update IFD pointer tags with the calculated offsets.
+ if (!mAttributes[IFD_EXIF_HINT].isEmpty()) {
+ mAttributes[IFD_TIFF_HINT].put(IFD_POINTER_TAGS[0].name,
+ ExifAttribute.createULong(ifdOffsets[IFD_EXIF_HINT], mExifByteOrder));
+ }
+ if (!mAttributes[IFD_GPS_HINT].isEmpty()) {
+ mAttributes[IFD_TIFF_HINT].put(IFD_POINTER_TAGS[1].name,
+ ExifAttribute.createULong(ifdOffsets[IFD_GPS_HINT], mExifByteOrder));
+ }
+ if (!mAttributes[IFD_INTEROPERABILITY_HINT].isEmpty()) {
+ mAttributes[IFD_EXIF_HINT].put(IFD_POINTER_TAGS[2].name, ExifAttribute.createULong(
+ ifdOffsets[IFD_INTEROPERABILITY_HINT], mExifByteOrder));
+ }
+
+ // Write TIFF Headers. See JEITA CP-3451C Table 1. page 10.
+ dataOutputStream.writeUnsignedShort(totalSize);
+ dataOutputStream.write(IDENTIFIER_EXIF_APP1);
+ dataOutputStream.writeShort(mExifByteOrder == ByteOrder.BIG_ENDIAN
+ ? BYTE_ALIGN_MM : BYTE_ALIGN_II);
+ dataOutputStream.setByteOrder(mExifByteOrder);
+ dataOutputStream.writeUnsignedShort(0x2a);
+ dataOutputStream.writeUnsignedInt(8);
+
+ // Write IFD groups. See JEITA CP-3451C Figure 7. page 12.
+ for (int hint = 0; hint < EXIF_TAGS.length; ++hint) {
+ if (!mAttributes[hint].isEmpty()) {
+ // See JEITA CP-3451C 4.6.2 IFD structure. page 13.
+ // Write entry count
+ dataOutputStream.writeUnsignedShort(mAttributes[hint].size());
+
+ // Write entry info
+ int dataOffset = ifdOffsets[hint] + 2 + mAttributes[hint].size() * 12 + 4;
+ for (Map.Entry entry : (Set<Map.Entry>) mAttributes[hint].entrySet()) {
+ // Convert tag name to tag number.
+ final ExifTag tag = (ExifTag) sExifTagMapsForWriting[hint].get(entry.getKey());
+ final int tagNumber = tag.number;
+ final ExifAttribute attribute = (ExifAttribute) entry.getValue();
+ final int size = attribute.size();
+
+ dataOutputStream.writeUnsignedShort(tagNumber);
+ dataOutputStream.writeUnsignedShort(attribute.format);
+ dataOutputStream.writeInt(attribute.numberOfComponents);
+ if (size > 4) {
+ dataOutputStream.writeUnsignedInt(dataOffset);
+ dataOffset += size;
+ } else {
+ dataOutputStream.write(attribute.bytes);
+ // Fill zero up to 4 bytes
+ if (size < 4) {
+ for (int i = size; i < 4; ++i) {
+ dataOutputStream.writeByte(0);
+ }
+ }
+ }
+ }
+
+ // Write the next offset. It writes the offset of thumbnail IFD if there is one or
+ // more tags in the thumbnail IFD when the current IFD is the primary image TIFF
+ // IFD; Otherwise 0.
+ if (hint == 0 && !mAttributes[IFD_THUMBNAIL_HINT].isEmpty()) {
+ dataOutputStream.writeUnsignedInt(ifdOffsets[IFD_THUMBNAIL_HINT]);
+ } else {
+ dataOutputStream.writeUnsignedInt(0);
+ }
+
+ // Write values of data field exceeding 4 bytes after the next offset.
+ for (Map.Entry entry : (Set<Map.Entry>) mAttributes[hint].entrySet()) {
+ ExifAttribute attribute = (ExifAttribute) entry.getValue();
+
+ if (attribute.bytes.length > 4) {
+ dataOutputStream.write(attribute.bytes, 0, attribute.bytes.length);
+ }
+ }
+ }
+ }
+
+ // Write thumbnail
+ if (mHasThumbnail) {
+ dataOutputStream.write(getThumbnail());
+ }
+
+ // Reset the byte order to big endian in order to write remaining parts of the JPEG file.
+ dataOutputStream.setByteOrder(ByteOrder.BIG_ENDIAN);
+
+ return totalSize;
+ }
+
+ /**
+ * Determines the data format of EXIF entry value.
+ *
+ * @param entryValue The value to be determined.
+ * @return Returns two data formats gussed as a pair in integer. If there is no two candidate
+ data formats for the given entry value, returns {@code -1} in the second of the pair.
+ */
+ private static Pair<Integer, Integer> guessDataFormat(String entryValue) {
+ // See TIFF 6.0 spec Types. page 15.
+ // Take the first component if there are more than one component.
+ if (entryValue.contains(",")) {
+ String[] entryValues = entryValue.split(",");
+ Pair<Integer, Integer> dataFormat = guessDataFormat(entryValues[0]);
+ if (dataFormat.first == IFD_FORMAT_STRING) {
+ return dataFormat;
+ }
+ for (int i = 1; i < entryValues.length; ++i) {
+ final Pair<Integer, Integer> guessDataFormat = guessDataFormat(entryValues[i]);
+ int first = -1, second = -1;
+ if (guessDataFormat.first == dataFormat.first
+ || guessDataFormat.second == dataFormat.first) {
+ first = dataFormat.first;
+ }
+ if (dataFormat.second != -1 && (guessDataFormat.first == dataFormat.second
+ || guessDataFormat.second == dataFormat.second)) {
+ second = dataFormat.second;
+ }
+ if (first == -1 && second == -1) {
+ return new Pair<>(IFD_FORMAT_STRING, -1);
+ }
+ if (first == -1) {
+ dataFormat = new Pair<>(second, -1);
+ continue;
+ }
+ if (second == -1) {
+ dataFormat = new Pair<>(first, -1);
+ continue;
+ }
+ }
+ return dataFormat;
+ }
+
+ if (entryValue.contains("/")) {
+ String[] rationalNumber = entryValue.split("/");
+ if (rationalNumber.length == 2) {
+ try {
+ long numerator = Long.parseLong(rationalNumber[0]);
+ long denominator = Long.parseLong(rationalNumber[1]);
+ if (numerator < 0L || denominator < 0L) {
+ return new Pair<>(IFD_FORMAT_SRATIONAL, - 1);
+ }
+ if (numerator > Integer.MAX_VALUE || denominator > Integer.MAX_VALUE) {
+ return new Pair<>(IFD_FORMAT_URATIONAL, -1);
+ }
+ return new Pair<>(IFD_FORMAT_SRATIONAL, IFD_FORMAT_URATIONAL);
+ } catch (NumberFormatException e) {
+ // Ignored
+ }
+ }
+ return new Pair<>(IFD_FORMAT_STRING, -1);
+ }
+ try {
+ Long longValue = Long.parseLong(entryValue);
+ if (longValue >= 0 && longValue <= 65535) {
+ return new Pair<>(IFD_FORMAT_USHORT, IFD_FORMAT_ULONG);
+ }
+ if (longValue < 0) {
+ return new Pair<>(IFD_FORMAT_SLONG, -1);
+ }
+ return new Pair<>(IFD_FORMAT_ULONG, -1);
+ } catch (NumberFormatException e) {
+ // Ignored
+ }
+ try {
+ Double.parseDouble(entryValue);
+ return new Pair<>(IFD_FORMAT_DOUBLE, -1);
+ } catch (NumberFormatException e) {
+ // Ignored
+ }
+ return new Pair<>(IFD_FORMAT_STRING, -1);
+ }
+
+ // An input stream to parse EXIF data area, which can be written in either little or big endian
+ // order.
+ private static class ByteOrderAwarenessDataInputStream extends ByteArrayInputStream {
+ private static final ByteOrder LITTLE_ENDIAN = ByteOrder.LITTLE_ENDIAN;
+ private static final ByteOrder BIG_ENDIAN = ByteOrder.BIG_ENDIAN;
+
+ private ByteOrder mByteOrder = ByteOrder.BIG_ENDIAN;
+ private final long mLength;
+ private long mPosition;
+
+ public ByteOrderAwarenessDataInputStream(byte[] bytes) {
+ super(bytes);
+ mLength = bytes.length;
+ mPosition = 0L;
+ }
+
+ public void setByteOrder(ByteOrder byteOrder) {
+ mByteOrder = byteOrder;
+ }
+
+ public void seek(long byteCount) throws IOException {
+ mPosition = 0L;
+ reset();
+ if (skip(byteCount) != byteCount) {
+ throw new IOException("Couldn't seek up to the byteCount");
+ }
+ }
+
+ public long peek() {
+ return mPosition;
+ }
+
+ public void readFully(byte[] buffer) throws IOException {
+ mPosition += buffer.length;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ if (super.read(buffer, 0, buffer.length) != buffer.length) {
+ throw new IOException("Couldn't read up to the length of buffer");
+ }
+ }
+
+ public byte readByte() throws IOException {
+ ++mPosition;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ int ch = super.read();
+ if (ch < 0) {
+ throw new EOFException();
+ }
+ return (byte) ch;
+ }
+
+ public short readShort() throws IOException {
+ mPosition += 2;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ int ch1 = super.read();
+ int ch2 = super.read();
+ if ((ch1 | ch2) < 0) {
+ throw new EOFException();
+ }
+ if (mByteOrder == LITTLE_ENDIAN) {
+ return (short) ((ch2 << 8) + (ch1));
+ } else if (mByteOrder == BIG_ENDIAN) {
+ return (short) ((ch1 << 8) + (ch2));
+ }
+ throw new IOException("Invalid byte order: " + mByteOrder);
+ }
+
+ public int readInt() throws IOException {
+ mPosition += 4;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ int ch1 = super.read();
+ int ch2 = super.read();
+ int ch3 = super.read();
+ int ch4 = super.read();
+ if ((ch1 | ch2 | ch3 | ch4) < 0) {
+ throw new EOFException();
+ }
+ if (mByteOrder == LITTLE_ENDIAN) {
+ return ((ch4 << 24) + (ch3 << 16) + (ch2 << 8) + ch1);
+ } else if (mByteOrder == BIG_ENDIAN) {
+ return ((ch1 << 24) + (ch2 << 16) + (ch3 << 8) + ch4);
+ }
+ throw new IOException("Invalid byte order: " + mByteOrder);
+ }
+
+ @Override
+ public long skip(long byteCount) {
+ long skipped = super.skip(Math.min(byteCount, mLength - mPosition));
+ mPosition += skipped;
+ return skipped;
+ }
+
+ public int readUnsignedShort() throws IOException {
+ mPosition += 2;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ int ch1 = super.read();
+ int ch2 = super.read();
+ if ((ch1 | ch2) < 0) {
+ throw new EOFException();
+ }
+ if (mByteOrder == LITTLE_ENDIAN) {
+ return ((ch2 << 8) + (ch1));
+ } else if (mByteOrder == BIG_ENDIAN) {
+ return ((ch1 << 8) + (ch2));
+ }
+ throw new IOException("Invalid byte order: " + mByteOrder);
+ }
+
+ public long readUnsignedInt() throws IOException {
+ return readInt() & 0xffffffffL;
+ }
+
+ public long readLong() throws IOException {
+ mPosition += 8;
+ if (mPosition > mLength) {
+ throw new EOFException();
+ }
+ int ch1 = super.read();
+ int ch2 = super.read();
+ int ch3 = super.read();
+ int ch4 = super.read();
+ int ch5 = super.read();
+ int ch6 = super.read();
+ int ch7 = super.read();
+ int ch8 = super.read();
+ if ((ch1 | ch2 | ch3 | ch4 | ch5 | ch6 | ch7 | ch8) < 0) {
+ throw new EOFException();
+ }
+ if (mByteOrder == LITTLE_ENDIAN) {
+ return (((long) ch8 << 56) + ((long) ch7 << 48) + ((long) ch6 << 40)
+ + ((long) ch5 << 32) + ((long) ch4 << 24) + ((long) ch3 << 16)
+ + ((long) ch2 << 8) + ch1);
+ } else if (mByteOrder == BIG_ENDIAN) {
+ return (((long) ch1 << 56) + ((long) ch2 << 48) + ((long) ch3 << 40)
+ + ((long) ch4 << 32) + ((long) ch5 << 24) + ((long) ch6 << 16)
+ + ((long) ch7 << 8) + ch8);
+ }
+ throw new IOException("Invalid byte order: " + mByteOrder);
+ }
+
+ public float readFloat() throws IOException {
+ return Float.intBitsToFloat(readInt());
+ }
+
+ public double readDouble() throws IOException {
+ return Double.longBitsToDouble(readLong());
+ }
+ }
+
+ // An output stream to write EXIF data area, which can be written in either little or big endian
+ // order.
+ private static class ByteOrderAwarenessDataOutputStream extends FilterOutputStream {
+ private final OutputStream mOutputStream;
+ private ByteOrder mByteOrder;
+
+ public ByteOrderAwarenessDataOutputStream(OutputStream out, ByteOrder byteOrder) {
+ super(out);
+ mOutputStream = out;
+ mByteOrder = byteOrder;
+ }
+
+ public void setByteOrder(ByteOrder byteOrder) {
+ mByteOrder = byteOrder;
+ }
+
+ public void write(byte[] bytes) throws IOException {
+ mOutputStream.write(bytes);
+ }
+
+ public void write(byte[] bytes, int offset, int length) throws IOException {
+ mOutputStream.write(bytes, offset, length);
+ }
+
+ public void writeByte(int val) throws IOException {
+ mOutputStream.write(val);
+ }
+
+ public void writeShort(short val) throws IOException {
+ if (mByteOrder == ByteOrder.LITTLE_ENDIAN) {
+ mOutputStream.write((val >>> 0) & 0xFF);
+ mOutputStream.write((val >>> 8) & 0xFF);
+ } else if (mByteOrder == ByteOrder.BIG_ENDIAN) {
+ mOutputStream.write((val >>> 8) & 0xFF);
+ mOutputStream.write((val >>> 0) & 0xFF);
+ }
+ }
+
+ public void writeInt(int val) throws IOException {
+ if (mByteOrder == ByteOrder.LITTLE_ENDIAN) {
+ mOutputStream.write((val >>> 0) & 0xFF);
+ mOutputStream.write((val >>> 8) & 0xFF);
+ mOutputStream.write((val >>> 16) & 0xFF);
+ mOutputStream.write((val >>> 24) & 0xFF);
+ } else if (mByteOrder == ByteOrder.BIG_ENDIAN) {
+ mOutputStream.write((val >>> 24) & 0xFF);
+ mOutputStream.write((val >>> 16) & 0xFF);
+ mOutputStream.write((val >>> 8) & 0xFF);
+ mOutputStream.write((val >>> 0) & 0xFF);
+ }
+ }
+
+ public void writeUnsignedShort(int val) throws IOException {
+ writeShort((short) val);
+ }
+
+ public void writeUnsignedInt(long val) throws IOException {
+ writeInt((int) val);
+ }
+ }
}
diff --git a/media/jni/Android.mk b/media/jni/Android.mk
index 79557bc..241df15 100644
--- a/media/jni/Android.mk
+++ b/media/jni/Android.mk
@@ -42,13 +42,9 @@
libcamera_client \
libmtp \
libusbhost \
- libjhead \
libexif \
libstagefright_amrnb_common
-LOCAL_REQUIRED_MODULES := \
- libjhead_jni
-
LOCAL_STATIC_LIBRARIES := \
libstagefright_amrnbenc
