Add support for XMP tags. (d95d0d2d) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -23747,6 +23747,7 @@ package android.media {
		ctor public ExifInterface(@NonNull java.io.InputStream) throws java.io.IOException;
		method public double getAltitude(double);
		method @Nullable public String getAttribute(@NonNull String);
		method @Nullable public byte[] getAttributeBytes(@NonNull String);
		method public double getAttributeDouble(@NonNull String, double);
		method public int getAttributeInt(@NonNull String, int);
		method @Nullable public long[] getAttributeRange(@NonNull String);
		@@ -23902,6 +23903,7 @@ package android.media {
		field public static final String TAG_USER_COMMENT = "UserComment";
		field public static final String TAG_WHITE_BALANCE = "WhiteBalance";
		field public static final String TAG_WHITE_POINT = "WhitePoint";
		field public static final String TAG_XMP = "Xmp";
		field public static final String TAG_X_RESOLUTION = "XResolution";
		field public static final String TAG_Y_CB_CR_COEFFICIENTS = "YCbCrCoefficients";
		field public static final String TAG_Y_CB_CR_POSITIONING = "YCbCrPositioning";

core/java/com/android/internal/util/ArrayUtils.java

+9 −0

Original line number	Diff line number	Diff line
		@@ -691,6 +691,15 @@ public class ArrayUtils {
		return result;
		}

		public static boolean startsWith(byte[] cur, byte[] val) {
		if (cur == null \|\| val == null) return false;
		if (cur.length < val.length) return false;
		for (int i = 0; i < val.length; i++) {
		if (cur[i] != val[i]) return false;
		}
		return true;
		}

		/**
		* Returns the first element from the array for which
		* condition {@code predicate} is true, or null if there is no such element

media/java/android/media/ExifInterface.java

+51 −32

Original line number	Diff line number	Diff line
		@@ -31,6 +31,8 @@ import android.system.OsConstants;
		import android.util.Log;
		import android.util.Pair;

		import com.android.internal.util.ArrayUtils;

		import libcore.io.IoUtils;
		import libcore.io.Streams;

		@@ -395,6 +397,12 @@ public class ExifInterface {
		* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/PanasonicRaw.html
		*/
		public static final String TAG_RW2_JPG_FROM_RAW = "JpgFromRaw";
		/**
		* Type is byte[]. See <a href=
		* "https://en.wikipedia.org/wiki/Extensible_Metadata_Platform">Extensible
		* Metadata Platform (XMP)</a> for details on contents.
		*/
		public static final String TAG_XMP = "Xmp";

		/**
		* Private tags used for pointing the other IFD offsets.
		@@ -1012,7 +1020,8 @@ public class ExifInterface {
		new ExifTag(TAG_RW2_SENSOR_BOTTOM_BORDER, 6, IFD_FORMAT_ULONG),
		new ExifTag(TAG_RW2_SENSOR_RIGHT_BORDER, 7, IFD_FORMAT_ULONG),
		new ExifTag(TAG_RW2_ISO, 23, IFD_FORMAT_USHORT),
		new ExifTag(TAG_RW2_JPG_FROM_RAW, 46, IFD_FORMAT_UNDEFINED)
		new ExifTag(TAG_RW2_JPG_FROM_RAW, 46, IFD_FORMAT_UNDEFINED),
		new ExifTag(TAG_XMP, 700, IFD_FORMAT_BYTE),
		};

		// Primary image IFD Exif Private tags (See JEITA CP-3451C Section 4.6.8 Tag Support Levels)
		@@ -1243,6 +1252,8 @@ public class ExifInterface {
		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);
		// Identifier for XMP APP1 segment in JPEG
		private static final byte[] IDENTIFIER_XMP_APP1 = "http://ns.adobe.com/xap/1.0/\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.
		@@ -2045,6 +2056,22 @@ public class ExifInterface {
		}
		}

		/**
		* Returns the raw bytes for the value of the requested tag inside the image
		* file, or {@code null} if the tag is not contained.
		*
		* @return raw bytes for the value of the requested tag, or {@code null} if
		* no tag was found.
		*/
		public @Nullable byte[] getAttributeBytes(@NonNull String tag) {
		final ExifAttribute attribute = getExifAttribute(tag);
		if (attribute != null) {
		return attribute.bytes;
		} else {
		return null;
		}
		}

		/**
		* Stores the latitude and longitude value in a float array. The first element is
		* the latitude, and the second element is the longitude. Returns false if the
		@@ -2432,40 +2459,32 @@ public class ExifInterface {
		}
		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 (in.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 + ")");
		}
		// Save offset values for createJpegThumbnailBitmap() function
		mExifOffset = bytesRead;

		byte[] bytes = new byte[length];
		if (in.read(bytes) != length) {
		throw new IOException("Invalid exif");
		}
		final int start = bytesRead;
		final byte[] bytes = new byte[length];
		in.readFully(bytes);
		bytesRead += length;
		length = 0;

		readExifSegment(bytes, imageType);
		if (ArrayUtils.startsWith(bytes, IDENTIFIER_EXIF_APP1)) {
		final long offset = start + IDENTIFIER_EXIF_APP1.length;
		final byte[] value = Arrays.copyOfRange(bytes,
		IDENTIFIER_EXIF_APP1.length, bytes.length);

		readExifSegment(value, imageType);

		// Save offset values for createJpegThumbnailBitmap() function
		mExifOffset = (int) offset;
		} else if (ArrayUtils.startsWith(bytes, IDENTIFIER_XMP_APP1)) {
		// See XMP Specification Part 3: Storage in Files, 1.1.3 JPEG, Table 6
		final long offset = start + IDENTIFIER_XMP_APP1.length;
		final byte[] value = Arrays.copyOfRange(bytes,
		IDENTIFIER_XMP_APP1.length, bytes.length);

		if (getAttribute(TAG_XMP) == null) {
		mAttributes[IFD_TYPE_PRIMARY].put(TAG_XMP, new ExifAttribute(
		IFD_FORMAT_BYTE, value.length, offset, value));
		}
		}
		break;
		}