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/*
* 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.test.ActivityTestCase;
import com.android.gallery3d.tests.R;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
public class ExifParserTest extends ActivityTestCase {
private static final String TAG = "ExifParserTest";
// The test image
private static final int IMG_RESOURCE_ID = R.raw.test_galaxy_nexus;
// IDF0 ground truth
private static final HashMap<Short, String> IFD0_VALUE = new HashMap<Short, String>();
static {
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_IMAGE_WIDTH, String.valueOf(2560));
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_IMAGE_HEIGHT, String.valueOf(1920));
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_MAKE, "google");
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_MODEL, "Nexus S");
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_ORIENTATION,
String.valueOf(ExifTag.TIFF_TAG.ORIENTATION_TOP_LEFT));
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_SOFTWARE, "MASTER");
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_DATE_TIME, "2012:07:30 16:28:42");
IFD0_VALUE.put(ExifTag.TIFF_TAG.TAG_Y_CB_CR_POSITIONING,
String.valueOf(ExifTag.TIFF_TAG.Y_CB_CR_POSITIONING_CENTERED));
}
// IDF1 ground truth
private static final HashMap<Short, String> IFD1_VALUE = new HashMap<Short, String>();
static {
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_COMPRESSION,
String.valueOf(ExifTag.TIFF_TAG.COMPRESSION_JPEG));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_X_RESOLUTION, "72/1");
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_Y_RESOLUTION, "72/1");
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_RESOLUTION_UNIT,
String.valueOf(ExifTag.TIFF_TAG.RESOLUTION_UNIT_INCHES));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_IMAGE_WIDTH, String.valueOf(320));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_IMAGE_HEIGHT, String.valueOf(240));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_ORIENTATION,
String.valueOf(ExifTag.TIFF_TAG.ORIENTATION_TOP_LEFT));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_JPEG_INTERCHANGE_FORMAT, String.valueOf(690));
IFD1_VALUE.put(ExifTag.TIFF_TAG.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, String.valueOf(10447));
}
// Exif-idf ground truth
private static final HashMap<Short, String> EXIF_IFD_VALUE = new HashMap<Short, String>();
static {
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_EXPOSURE_TIME, "1/40");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_F_NUMBER, "26/10");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_EXPOSURE_PROGRAM,
String.valueOf(ExifTag.EXIF_TAG.EXPOSURE_PROGRAM_APERTURE_PRIORITY));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_ISO_SPEED_RATINGS, "100");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_EXIF_VERSION, "48 50 50 48"); // 0220
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_DATE_TIME_ORIGINAL, "2012:07:30 16:28:42");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_DATE_TIME_DIGITIZED, "2012:07:30 16:28:42");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_SHUTTER_SPEED, "50/10");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_APERTURE_VALUE, "30/10");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_BRIGHTNESS_VALUE, "30/10");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_EXPOSURE_BIAS_VALUE, "0/0");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_MAX_APERTURE_VALUE, "30/10");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_METERING_MODE,
String.valueOf(ExifTag.EXIF_TAG.METERING_MODE_CENTER_WEIGHTED_AVERAGE));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_FLASH,
String.valueOf(ExifTag.EXIF_TAG.FLASH_DID_NOT_FIRED));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_FOCAL_LENGTH, "343/100");
// User command is strange in test_galaxy_nexus, so a binary representation is used here
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_USER_COMMENT,
"0 0 0 73 73 67 83 65 85 115 101 114 32 99 111 109 109 101 110 116 115 0");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_COLOR_SPACE,
String.valueOf(ExifTag.EXIF_TAG.COLOR_SPACE_SRGB));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_PIXEL_X_DIMENSION, "2560");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_PIXEL_Y_DIMENSION, "1920");
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_EXPOSURE_MODE,
String.valueOf(ExifTag.EXIF_TAG.EXPOSURE_MODE_AUTO_EXPOSURE));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_WHITH_BALANCE,
String.valueOf(ExifTag.EXIF_TAG.WHITE_BALACE_MODE_AUTO));
EXIF_IFD_VALUE.put(ExifTag.EXIF_TAG.TAG_SCENE_CAPTURE_TYPE,
String.valueOf(ExifTag.EXIF_TAG.SCENE_CAPTURE_TYPE_STANDARD));
}
private InputStream mImageInputStream;
@Override
protected void setUp() {
mImageInputStream = getInstrumentation()
.getContext().getResources().openRawResource(IMG_RESOURCE_ID);
}
public void testParse() throws IOException, ExifInvalidFormatException {
ExifParser parser = new ExifParser();
parseIfd0(parser.parse(mImageInputStream));
}
private void parseIfd0(IfdParser ifdParser) throws IOException,
ExifInvalidFormatException {
int type = ifdParser.next();
while (type != IfdParser.TYPE_END) {
switch (type) {
case IfdParser.TYPE_NEW_TAG:
ExifTag tag = ifdParser.readTag();
if (tag.getOffset() > 0) {
ifdParser.waitValueOfTag(tag);
} else {
checkTag(tag, ifdParser, IFD0_VALUE);
}
break;
case IfdParser.TYPE_NEXT_IFD:
parseIfd1(ifdParser.parseIfdBlock());
break;
case IfdParser.TYPE_SUB_IFD:
assertEquals(ExifTag.TIFF_TAG.TAG_EXIF_IFD,
ifdParser.getCorrespodingExifTag().getTagId());
parseExifIfd(ifdParser.parseIfdBlock());
break;
case IfdParser.TYPE_VALUE_OF_PREV_TAG:
checkTag(ifdParser.getCorrespodingExifTag(), ifdParser, IFD0_VALUE);
break;
}
type = ifdParser.next();
}
}
private void parseIfd1(IfdParser ifdParser) throws IOException,
ExifInvalidFormatException {
int type = ifdParser.next();
while (type != IfdParser.TYPE_END) {
switch (type) {
case IfdParser.TYPE_NEW_TAG:
ExifTag tag = ifdParser.readTag();
if (tag.getOffset() > 0) {
ifdParser.waitValueOfTag(tag);
} else {
checkTag(tag, ifdParser, IFD1_VALUE);
}
break;
case IfdParser.TYPE_NEXT_IFD:
// There is no next ifd after ifd1;
assertTrue(false);
break;
case IfdParser.TYPE_SUB_IFD:
// There is no sub ifd in ifd1;
assertTrue(false);
break;
case IfdParser.TYPE_VALUE_OF_PREV_TAG:
checkTag(ifdParser.getCorrespodingExifTag(), ifdParser, IFD1_VALUE);
break;
}
type = ifdParser.next();
}
}
private void parseExifIfd(IfdParser ifdParser) throws IOException,
ExifInvalidFormatException {
int type = ifdParser.next();
while (type != IfdParser.TYPE_END) {
switch (type) {
case IfdParser.TYPE_NEW_TAG:
ExifTag tag = ifdParser.readTag();
if (tag.getOffset() > 0) {
ifdParser.waitValueOfTag(tag);
} else {
checkTag(tag, ifdParser, EXIF_IFD_VALUE);
}
break;
case IfdParser.TYPE_NEXT_IFD:
// There is no next ifd after exif ifd;
assertTrue(false);
break;
case IfdParser.TYPE_SUB_IFD:
// There is no sub ifd in exif ifd;
assertTrue(false);
break;
case IfdParser.TYPE_VALUE_OF_PREV_TAG:
checkTag(ifdParser.getCorrespodingExifTag(), ifdParser, EXIF_IFD_VALUE);
break;
}
type = ifdParser.next();
}
}
private void checkTag(ExifTag tag, IfdParser ifdParser, HashMap<Short, String> truth)
throws IOException {
assertEquals(truth.get(tag.getTagId()), readValueToString(tag, ifdParser));
}
private String readValueToString(ExifTag tag, IfdParser parser) throws IOException {
StringBuilder sbuilder = new StringBuilder();
switch(tag.getDataType()) {
case ExifTag.TYPE_BYTE:
byte buf[] = new byte[tag.getComponentCount()];
parser.read(buf);
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(buf[i]);
}
break;
case ExifTag.TYPE_ASCII:
sbuilder.append(parser.readString(tag.getComponentCount()));
break;
case ExifTag.TYPE_INT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(parser.readUnsignedInt());
}
break;
case ExifTag.TYPE_RATIONAL:
for(int i = 0; i < tag.getComponentCount(); i++) {
Rational r = parser.readUnsignedRational();
if(i != 0) sbuilder.append(" ");
sbuilder.append(r.getNominator()).append("/").append(r.getDenominator());
}
break;
case ExifTag.TYPE_SHORT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(parser.readUnsignedShort());
}
break;
case ExifTag.TYPE_SINT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(parser.readInt());
}
break;
case ExifTag.TYPE_SRATIONAL:
for(int i = 0; i < tag.getComponentCount(); i++) {
Rational r = parser.readRational();
if(i != 0) sbuilder.append(" ");
sbuilder.append(r.getNominator()).append("/").append(r.getDenominator());
}
break;
case ExifTag.TYPE_UNDEFINED:
byte buffer[] = new byte[tag.getComponentCount()];
parser.read(buffer);
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(buffer[i]);
}
break;
}
return sbuilder.toString();
}
@Override
protected void tearDown() throws IOException {
mImageInputStream.close();
}
}
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