diff options
Diffstat (limited to 'src/com/android/gallery3d/exif/ExifOutputStream.java')
| -rw-r--r-- | src/com/android/gallery3d/exif/ExifOutputStream.java | 518 |
1 files changed, 0 insertions, 518 deletions
diff --git a/src/com/android/gallery3d/exif/ExifOutputStream.java b/src/com/android/gallery3d/exif/ExifOutputStream.java deleted file mode 100644 index 7ca05f2e0..000000000 --- a/src/com/android/gallery3d/exif/ExifOutputStream.java +++ /dev/null @@ -1,518 +0,0 @@ -/* - * Copyright (C) 2012 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.android.gallery3d.exif; - -import android.util.Log; - -import java.io.BufferedOutputStream; -import java.io.FilterOutputStream; -import java.io.IOException; -import java.io.OutputStream; -import java.nio.ByteBuffer; -import java.nio.ByteOrder; -import java.util.ArrayList; - -/** - * This class provides a way to replace the Exif header of a JPEG image. - * <p> - * Below is an example of writing EXIF data into a file - * - * <pre> - * public static void writeExif(byte[] jpeg, ExifData exif, String path) { - * OutputStream os = null; - * try { - * os = new FileOutputStream(path); - * ExifOutputStream eos = new ExifOutputStream(os); - * // Set the exif header - * eos.setExifData(exif); - * // Write the original jpeg out, the header will be add into the file. - * eos.write(jpeg); - * } catch (FileNotFoundException e) { - * e.printStackTrace(); - * } catch (IOException e) { - * e.printStackTrace(); - * } finally { - * if (os != null) { - * try { - * os.close(); - * } catch (IOException e) { - * e.printStackTrace(); - * } - * } - * } - * } - * </pre> - */ -class ExifOutputStream extends FilterOutputStream { - private static final String TAG = "ExifOutputStream"; - private static final boolean DEBUG = false; - private static final int STREAMBUFFER_SIZE = 0x00010000; // 64Kb - - private static final int STATE_SOI = 0; - private static final int STATE_FRAME_HEADER = 1; - private static final int STATE_JPEG_DATA = 2; - - private static final int EXIF_HEADER = 0x45786966; - private static final short TIFF_HEADER = 0x002A; - private static final short TIFF_BIG_ENDIAN = 0x4d4d; - private static final short TIFF_LITTLE_ENDIAN = 0x4949; - private static final short TAG_SIZE = 12; - private static final short TIFF_HEADER_SIZE = 8; - private static final int MAX_EXIF_SIZE = 65535; - - private ExifData mExifData; - private int mState = STATE_SOI; - private int mByteToSkip; - private int mByteToCopy; - private byte[] mSingleByteArray = new byte[1]; - private ByteBuffer mBuffer = ByteBuffer.allocate(4); - private final ExifInterface mInterface; - - protected ExifOutputStream(OutputStream ou, ExifInterface iRef) { - super(new BufferedOutputStream(ou, STREAMBUFFER_SIZE)); - mInterface = iRef; - } - - /** - * Sets the ExifData to be written into the JPEG file. Should be called - * before writing image data. - */ - protected void setExifData(ExifData exifData) { - mExifData = exifData; - } - - /** - * Gets the Exif header to be written into the JPEF file. - */ - protected ExifData getExifData() { - return mExifData; - } - - private int requestByteToBuffer(int requestByteCount, byte[] buffer - , int offset, int length) { - int byteNeeded = requestByteCount - mBuffer.position(); - int byteToRead = length > byteNeeded ? byteNeeded : length; - mBuffer.put(buffer, offset, byteToRead); - return byteToRead; - } - - /** - * Writes the image out. The input data should be a valid JPEG format. After - * writing, it's Exif header will be replaced by the given header. - */ - @Override - public void write(byte[] buffer, int offset, int length) throws IOException { - while ((mByteToSkip > 0 || mByteToCopy > 0 || mState != STATE_JPEG_DATA) - && length > 0) { - if (mByteToSkip > 0) { - int byteToProcess = length > mByteToSkip ? mByteToSkip : length; - length -= byteToProcess; - mByteToSkip -= byteToProcess; - offset += byteToProcess; - } - if (mByteToCopy > 0) { - int byteToProcess = length > mByteToCopy ? mByteToCopy : length; - out.write(buffer, offset, byteToProcess); - length -= byteToProcess; - mByteToCopy -= byteToProcess; - offset += byteToProcess; - } - if (length == 0) { - return; - } - switch (mState) { - case STATE_SOI: - int byteRead = requestByteToBuffer(2, buffer, offset, length); - offset += byteRead; - length -= byteRead; - if (mBuffer.position() < 2) { - return; - } - mBuffer.rewind(); - if (mBuffer.getShort() != JpegHeader.SOI) { - throw new IOException("Not a valid jpeg image, cannot write exif"); - } - out.write(mBuffer.array(), 0, 2); - mState = STATE_FRAME_HEADER; - mBuffer.rewind(); - writeExifData(); - break; - case STATE_FRAME_HEADER: - // We ignore the APP1 segment and copy all other segments - // until SOF tag. - byteRead = requestByteToBuffer(4, buffer, offset, length); - offset += byteRead; - length -= byteRead; - // Check if this image data doesn't contain SOF. - if (mBuffer.position() == 2) { - short tag = mBuffer.getShort(); - if (tag == JpegHeader.EOI) { - out.write(mBuffer.array(), 0, 2); - mBuffer.rewind(); - } - } - if (mBuffer.position() < 4) { - return; - } - mBuffer.rewind(); - short marker = mBuffer.getShort(); - if (marker == JpegHeader.APP1) { - mByteToSkip = (mBuffer.getShort() & 0x0000ffff) - 2; - mState = STATE_JPEG_DATA; - } else if (!JpegHeader.isSofMarker(marker)) { - out.write(mBuffer.array(), 0, 4); - mByteToCopy = (mBuffer.getShort() & 0x0000ffff) - 2; - } else { - out.write(mBuffer.array(), 0, 4); - mState = STATE_JPEG_DATA; - } - mBuffer.rewind(); - } - } - if (length > 0) { - out.write(buffer, offset, length); - } - } - - /** - * Writes the one bytes out. The input data should be a valid JPEG format. - * After writing, it's Exif header will be replaced by the given header. - */ - @Override - public void write(int oneByte) throws IOException { - mSingleByteArray[0] = (byte) (0xff & oneByte); - write(mSingleByteArray); - } - - /** - * Equivalent to calling write(buffer, 0, buffer.length). - */ - @Override - public void write(byte[] buffer) throws IOException { - write(buffer, 0, buffer.length); - } - - private void writeExifData() throws IOException { - if (mExifData == null) { - return; - } - if (DEBUG) { - Log.v(TAG, "Writing exif data..."); - } - ArrayList<ExifTag> nullTags = stripNullValueTags(mExifData); - createRequiredIfdAndTag(); - int exifSize = calculateAllOffset(); - if (exifSize + 8 > MAX_EXIF_SIZE) { - throw new IOException("Exif header is too large (>64Kb)"); - } - OrderedDataOutputStream dataOutputStream = new OrderedDataOutputStream(out); - dataOutputStream.setByteOrder(ByteOrder.BIG_ENDIAN); - dataOutputStream.writeShort(JpegHeader.APP1); - dataOutputStream.writeShort((short) (exifSize + 8)); - dataOutputStream.writeInt(EXIF_HEADER); - dataOutputStream.writeShort((short) 0x0000); - if (mExifData.getByteOrder() == ByteOrder.BIG_ENDIAN) { - dataOutputStream.writeShort(TIFF_BIG_ENDIAN); - } else { - dataOutputStream.writeShort(TIFF_LITTLE_ENDIAN); - } - dataOutputStream.setByteOrder(mExifData.getByteOrder()); - dataOutputStream.writeShort(TIFF_HEADER); - dataOutputStream.writeInt(8); - writeAllTags(dataOutputStream); - writeThumbnail(dataOutputStream); - for (ExifTag t : nullTags) { - mExifData.addTag(t); - } - } - - private ArrayList<ExifTag> stripNullValueTags(ExifData data) { - ArrayList<ExifTag> nullTags = new ArrayList<ExifTag>(); - for(ExifTag t : data.getAllTags()) { - if (t.getValue() == null && !ExifInterface.isOffsetTag(t.getTagId())) { - data.removeTag(t.getTagId(), t.getIfd()); - nullTags.add(t); - } - } - return nullTags; - } - - private void writeThumbnail(OrderedDataOutputStream dataOutputStream) throws IOException { - if (mExifData.hasCompressedThumbnail()) { - dataOutputStream.write(mExifData.getCompressedThumbnail()); - } else if (mExifData.hasUncompressedStrip()) { - for (int i = 0; i < mExifData.getStripCount(); i++) { - dataOutputStream.write(mExifData.getStrip(i)); - } - } - } - - private void writeAllTags(OrderedDataOutputStream dataOutputStream) throws IOException { - writeIfd(mExifData.getIfdData(IfdId.TYPE_IFD_0), dataOutputStream); - writeIfd(mExifData.getIfdData(IfdId.TYPE_IFD_EXIF), dataOutputStream); - IfdData interoperabilityIfd = mExifData.getIfdData(IfdId.TYPE_IFD_INTEROPERABILITY); - if (interoperabilityIfd != null) { - writeIfd(interoperabilityIfd, dataOutputStream); - } - IfdData gpsIfd = mExifData.getIfdData(IfdId.TYPE_IFD_GPS); - if (gpsIfd != null) { - writeIfd(gpsIfd, dataOutputStream); - } - IfdData ifd1 = mExifData.getIfdData(IfdId.TYPE_IFD_1); - if (ifd1 != null) { - writeIfd(mExifData.getIfdData(IfdId.TYPE_IFD_1), dataOutputStream); - } - } - - private void writeIfd(IfdData ifd, OrderedDataOutputStream dataOutputStream) - throws IOException { - ExifTag[] tags = ifd.getAllTags(); - dataOutputStream.writeShort((short) tags.length); - for (ExifTag tag : tags) { - dataOutputStream.writeShort(tag.getTagId()); - dataOutputStream.writeShort(tag.getDataType()); - dataOutputStream.writeInt(tag.getComponentCount()); - if (DEBUG) { - Log.v(TAG, "\n" + tag.toString()); - } - if (tag.getDataSize() > 4) { - dataOutputStream.writeInt(tag.getOffset()); - } else { - ExifOutputStream.writeTagValue(tag, dataOutputStream); - for (int i = 0, n = 4 - tag.getDataSize(); i < n; i++) { - dataOutputStream.write(0); - } - } - } - dataOutputStream.writeInt(ifd.getOffsetToNextIfd()); - for (ExifTag tag : tags) { - if (tag.getDataSize() > 4) { - ExifOutputStream.writeTagValue(tag, dataOutputStream); - } - } - } - - private int calculateOffsetOfIfd(IfdData ifd, int offset) { - offset += 2 + ifd.getTagCount() * TAG_SIZE + 4; - ExifTag[] tags = ifd.getAllTags(); - for (ExifTag tag : tags) { - if (tag.getDataSize() > 4) { - tag.setOffset(offset); - offset += tag.getDataSize(); - } - } - return offset; - } - - private void createRequiredIfdAndTag() throws IOException { - // IFD0 is required for all file - IfdData ifd0 = mExifData.getIfdData(IfdId.TYPE_IFD_0); - if (ifd0 == null) { - ifd0 = new IfdData(IfdId.TYPE_IFD_0); - mExifData.addIfdData(ifd0); - } - ExifTag exifOffsetTag = mInterface.buildUninitializedTag(ExifInterface.TAG_EXIF_IFD); - if (exifOffsetTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_EXIF_IFD); - } - ifd0.setTag(exifOffsetTag); - - // Exif IFD is required for all files. - IfdData exifIfd = mExifData.getIfdData(IfdId.TYPE_IFD_EXIF); - if (exifIfd == null) { - exifIfd = new IfdData(IfdId.TYPE_IFD_EXIF); - mExifData.addIfdData(exifIfd); - } - - // GPS IFD - IfdData gpsIfd = mExifData.getIfdData(IfdId.TYPE_IFD_GPS); - if (gpsIfd != null) { - ExifTag gpsOffsetTag = mInterface.buildUninitializedTag(ExifInterface.TAG_GPS_IFD); - if (gpsOffsetTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_GPS_IFD); - } - ifd0.setTag(gpsOffsetTag); - } - - // Interoperability IFD - IfdData interIfd = mExifData.getIfdData(IfdId.TYPE_IFD_INTEROPERABILITY); - if (interIfd != null) { - ExifTag interOffsetTag = mInterface - .buildUninitializedTag(ExifInterface.TAG_INTEROPERABILITY_IFD); - if (interOffsetTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_INTEROPERABILITY_IFD); - } - exifIfd.setTag(interOffsetTag); - } - - IfdData ifd1 = mExifData.getIfdData(IfdId.TYPE_IFD_1); - - // thumbnail - if (mExifData.hasCompressedThumbnail()) { - - if (ifd1 == null) { - ifd1 = new IfdData(IfdId.TYPE_IFD_1); - mExifData.addIfdData(ifd1); - } - - ExifTag offsetTag = mInterface - .buildUninitializedTag(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT); - if (offsetTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT); - } - - ifd1.setTag(offsetTag); - ExifTag lengthTag = mInterface - .buildUninitializedTag(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH); - if (lengthTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH); - } - - lengthTag.setValue(mExifData.getCompressedThumbnail().length); - ifd1.setTag(lengthTag); - - // Get rid of tags for uncompressed if they exist. - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_STRIP_OFFSETS)); - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_STRIP_BYTE_COUNTS)); - } else if (mExifData.hasUncompressedStrip()) { - if (ifd1 == null) { - ifd1 = new IfdData(IfdId.TYPE_IFD_1); - mExifData.addIfdData(ifd1); - } - int stripCount = mExifData.getStripCount(); - ExifTag offsetTag = mInterface.buildUninitializedTag(ExifInterface.TAG_STRIP_OFFSETS); - if (offsetTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_STRIP_OFFSETS); - } - ExifTag lengthTag = mInterface - .buildUninitializedTag(ExifInterface.TAG_STRIP_BYTE_COUNTS); - if (lengthTag == null) { - throw new IOException("No definition for crucial exif tag: " - + ExifInterface.TAG_STRIP_BYTE_COUNTS); - } - long[] lengths = new long[stripCount]; - for (int i = 0; i < mExifData.getStripCount(); i++) { - lengths[i] = mExifData.getStrip(i).length; - } - lengthTag.setValue(lengths); - ifd1.setTag(offsetTag); - ifd1.setTag(lengthTag); - // Get rid of tags for compressed if they exist. - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT)); - ifd1.removeTag(ExifInterface - .getTrueTagKey(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH)); - } else if (ifd1 != null) { - // Get rid of offset and length tags if there is no thumbnail. - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_STRIP_OFFSETS)); - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_STRIP_BYTE_COUNTS)); - ifd1.removeTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT)); - ifd1.removeTag(ExifInterface - .getTrueTagKey(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH)); - } - } - - private int calculateAllOffset() { - int offset = TIFF_HEADER_SIZE; - IfdData ifd0 = mExifData.getIfdData(IfdId.TYPE_IFD_0); - offset = calculateOffsetOfIfd(ifd0, offset); - ifd0.getTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_EXIF_IFD)).setValue(offset); - - IfdData exifIfd = mExifData.getIfdData(IfdId.TYPE_IFD_EXIF); - offset = calculateOffsetOfIfd(exifIfd, offset); - - IfdData interIfd = mExifData.getIfdData(IfdId.TYPE_IFD_INTEROPERABILITY); - if (interIfd != null) { - exifIfd.getTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_INTEROPERABILITY_IFD)) - .setValue(offset); - offset = calculateOffsetOfIfd(interIfd, offset); - } - - IfdData gpsIfd = mExifData.getIfdData(IfdId.TYPE_IFD_GPS); - if (gpsIfd != null) { - ifd0.getTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_GPS_IFD)).setValue(offset); - offset = calculateOffsetOfIfd(gpsIfd, offset); - } - - IfdData ifd1 = mExifData.getIfdData(IfdId.TYPE_IFD_1); - if (ifd1 != null) { - ifd0.setOffsetToNextIfd(offset); - offset = calculateOffsetOfIfd(ifd1, offset); - } - - // thumbnail - if (mExifData.hasCompressedThumbnail()) { - ifd1.getTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT)) - .setValue(offset); - offset += mExifData.getCompressedThumbnail().length; - } else if (mExifData.hasUncompressedStrip()) { - int stripCount = mExifData.getStripCount(); - long[] offsets = new long[stripCount]; - for (int i = 0; i < mExifData.getStripCount(); i++) { - offsets[i] = offset; - offset += mExifData.getStrip(i).length; - } - ifd1.getTag(ExifInterface.getTrueTagKey(ExifInterface.TAG_STRIP_OFFSETS)).setValue( - offsets); - } - return offset; - } - - static void writeTagValue(ExifTag tag, OrderedDataOutputStream dataOutputStream) - throws IOException { - switch (tag.getDataType()) { - case ExifTag.TYPE_ASCII: - byte buf[] = tag.getStringByte(); - if (buf.length == tag.getComponentCount()) { - buf[buf.length - 1] = 0; - dataOutputStream.write(buf); - } else { - dataOutputStream.write(buf); - dataOutputStream.write(0); - } - break; - case ExifTag.TYPE_LONG: - case ExifTag.TYPE_UNSIGNED_LONG: - for (int i = 0, n = tag.getComponentCount(); i < n; i++) { - dataOutputStream.writeInt((int) tag.getValueAt(i)); - } - break; - case ExifTag.TYPE_RATIONAL: - case ExifTag.TYPE_UNSIGNED_RATIONAL: - for (int i = 0, n = tag.getComponentCount(); i < n; i++) { - dataOutputStream.writeRational(tag.getRational(i)); - } - break; - case ExifTag.TYPE_UNDEFINED: - case ExifTag.TYPE_UNSIGNED_BYTE: - buf = new byte[tag.getComponentCount()]; - tag.getBytes(buf); - dataOutputStream.write(buf); - break; - case ExifTag.TYPE_UNSIGNED_SHORT: - for (int i = 0, n = tag.getComponentCount(); i < n; i++) { - dataOutputStream.writeShort((short) tag.getValueAt(i)); - } - break; - } - } -} |