public void testRead() throws ExifInvalidFormatException, IOException { ExifReader reader = new ExifReader(); ExifData exifData = reader.read(mImageInputStream); checkIfd(exifData.getIfdData(IfdId.TYPE_IFD_0), mIfd0Value); checkIfd(exifData.getIfdData(IfdId.TYPE_IFD_1), mIfd1Value); checkIfd(exifData.getIfdData(IfdId.TYPE_IFD_EXIF), mExifIfdValue); checkIfd(exifData.getIfdData(IfdId.TYPE_IFD_INTEROPERABILITY), mInteroperabilityIfdValue); checkThumbnail(exifData); }
private void checkThumbnail(ExifData exifData) { IfdData ifd1 = exifData.getIfdData(IfdId.TYPE_IFD_1); if (ifd1 != null) { if (ifd1.getTag(ExifTag.TAG_COMPRESSION).getUnsignedShort(0) == ExifTag.Compression.JPEG) { assertTrue(exifData.hasCompressedThumbnail()); byte[] thumbnail = exifData.getCompressedThumbnail(); assertTrue(BitmapFactory.decodeByteArray(thumbnail, 0, thumbnail.length) != null); } else { // Try to check the strip count with the formula provided by EXIF spec. int planarType = ExifTag.PlanarConfiguration.CHUNKY; ExifTag planarTag = ifd1.getTag(ExifTag.TAG_PLANAR_CONFIGURATION); if (planarTag != null) { planarType = planarTag.getUnsignedShort(0); } ExifTag heightTag = ifd1.getTag(ExifTag.TAG_IMAGE_LENGTH); ExifTag rowPerStripTag = ifd1.getTag(ExifTag.TAG_ROWS_PER_STRIP); int imageLength = getUnsignedIntOrShort(heightTag); int rowsPerStrip = getUnsignedIntOrShort(rowPerStripTag); int stripCount = ifd1.getTag(ExifTag.TAG_STRIP_OFFSETS).getComponentCount(); if (planarType == ExifTag.PlanarConfiguration.CHUNKY) { assertTrue(stripCount == (imageLength + rowsPerStrip - 1) / rowsPerStrip); } else { ExifTag samplePerPixelTag = ifd1.getTag(ExifTag.TAG_SAMPLES_PER_PIXEL); int samplePerPixel = samplePerPixelTag.getUnsignedShort(0); assertTrue( stripCount == (imageLength + rowsPerStrip - 1) / rowsPerStrip * samplePerPixel); } for (int i = 0; i < stripCount; i++) { ExifTag byteCountTag = ifd1.getTag(ExifTag.TAG_STRIP_BYTE_COUNTS); if (byteCountTag.getDataType() == ExifTag.TYPE_UNSIGNED_SHORT) { assertEquals(byteCountTag.getUnsignedShort(i), exifData.getStrip(i).length); } else { assertEquals(byteCountTag.getUnsignedLong(i), exifData.getStrip(i).length); } } } } }
/** * Parses the inputStream and and returns the EXIF data in an {@link ExifData}. * * @throws ExifInvalidFormatException * @throws IOException */ protected ExifData read(InputStream inputStream) throws ExifInvalidFormatException, IOException { ExifParser parser = ExifParser.parse(inputStream, mInterface); ExifData exifData = new ExifData(parser.getByteOrder()); ExifTag tag = null; int event = parser.next(); while (event != ExifParser.EVENT_END) { switch (event) { case ExifParser.EVENT_START_OF_IFD: exifData.addIfdData(new IfdData(parser.getCurrentIfd())); break; case ExifParser.EVENT_NEW_TAG: tag = parser.getTag(); if (!tag.hasValue()) { parser.registerForTagValue(tag); } else { exifData.getIfdData(tag.getIfd()).setTag(tag); } break; case ExifParser.EVENT_VALUE_OF_REGISTERED_TAG: tag = parser.getTag(); if (tag.getDataType() == ExifTag.TYPE_UNDEFINED) { parser.readFullTagValue(tag); } exifData.getIfdData(tag.getIfd()).setTag(tag); break; case ExifParser.EVENT_COMPRESSED_IMAGE: byte buf[] = new byte[parser.getCompressedImageSize()]; if (buf.length == parser.read(buf)) { exifData.setCompressedThumbnail(buf); } else { Log.w(TAG, "Failed to read the compressed thumbnail"); } break; case ExifParser.EVENT_UNCOMPRESSED_STRIP: buf = new byte[parser.getStripSize()]; if (buf.length == parser.read(buf)) { exifData.setStripBytes(parser.getStripIndex(), buf); } else { Log.w(TAG, "Failed to read the strip bytes"); } break; } event = parser.next(); } return exifData; }
/** * Parses the inputStream and and returns the EXIF data in an {@link ExifData}. * * @throws ExifInvalidFormatException * @throws java.io.IOException */ protected ExifData read(InputStream inputStream, int options) throws ExifInvalidFormatException, IOException { ExifParser parser = ExifParser.parse(inputStream, options, mInterface); ExifData exifData = new ExifData(parser.getByteOrder()); exifData.setSections(parser.getSections()); exifData.mUncompressedDataPosition = parser.getUncompressedDataPosition(); exifData.setQualityGuess(parser.getQualityGuess()); exifData.setJpegProcess(parser.getJpegProcess()); final int w = parser.getImageWidth(); final int h = parser.getImageLength(); if (w > 0 && h > 0) { exifData.setImageSize(w, h); } ExifTag tag; int event = parser.next(); while (event != ExifParser.EVENT_END) { switch (event) { case ExifParser.EVENT_START_OF_IFD: exifData.addIfdData(new IfdData(parser.getCurrentIfd())); break; case ExifParser.EVENT_NEW_TAG: tag = parser.getTag(); if (!tag.hasValue()) { parser.registerForTagValue(tag); } else { // Log.v(TAG, "parsing id " + tag.getTagId() + " = " + tag); if (parser.isDefinedTag(tag.getIfd(), tag.getTagId())) { exifData.getIfdData(tag.getIfd()).setTag(tag); } else { Log.w(TAG, "skip tag because not registered in the tag table:" + tag); } } break; case ExifParser.EVENT_VALUE_OF_REGISTERED_TAG: tag = parser.getTag(); if (tag.getDataType() == ExifTag.TYPE_UNDEFINED) { parser.readFullTagValue(tag); } exifData.getIfdData(tag.getIfd()).setTag(tag); break; case ExifParser.EVENT_COMPRESSED_IMAGE: byte buf[] = new byte[parser.getCompressedImageSize()]; if (buf.length == parser.read(buf)) { exifData.setCompressedThumbnail(buf); } else { Log.w(TAG, "Failed to read the compressed thumbnail"); } break; case ExifParser.EVENT_UNCOMPRESSED_STRIP: buf = new byte[parser.getStripSize()]; if (buf.length == parser.read(buf)) { exifData.setStripBytes(parser.getStripIndex(), buf); } else { Log.w(TAG, "Failed to read the strip bytes"); } break; } event = parser.next(); } return exifData; }