/**
* Calculate the size of this IPTC directory if if were to be encoded inside a JPEG image.
*
* @return Returns the size in bytes.
*/
private int calcEncodedIPTCSize() {
int size = 0;
for (Iterator<Map.Entry<Integer, ImageMetaValue>> i = iterator(); i.hasNext(); ) {
final Map.Entry<Integer, ImageMetaValue> me = i.next();
final ImageMetaValue imValue = me.getValue();
switch (imValue.getType()) {
case META_SBYTE:
case META_UBYTE:
size += IPTC_ENTRY_HEADER_SIZE + 1;
break;
case META_DATE:
size += IPTC_ENTRY_HEADER_SIZE + IPTC_DATE_SIZE;
break;
case META_SSHORT:
case META_USHORT:
size += IPTC_ENTRY_HEADER_SIZE + IPTC_SHORT_SIZE;
break;
case META_STRING:
for (String s : imValue.getValues()) {
try {
final byte[] b = s.getBytes("ISO-8859-1");
size += IPTC_ENTRY_HEADER_SIZE + b.length;
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException(e);
}
}
break;
default:
throw new IllegalStateException();
}
}
return size;
}
/** {@inheritDoc} */
public String valueToString(ImageMetaValue value) {
switch (value.getOwningTagID()) {
case OLYMPUS_BLUE_BALANCE:
case OLYMPUS_RED_BALANCE:
return TextUtil.tenths(value.getFloatValue() / 256);
case OLYMPUS_CS_CUSTOM_SATURATION:
{
final String model = getOwningMetadata().getCameraMake(true);
if (model != null && model.contains("E-1")) {
final long[] n = ((LongMetaValue) value).getLongValues();
n[0] -= n[1];
n[2] -= n[1];
return n[0] + " (0," + n[2] + ')';
}
// no break;
}
case OLYMPUS_CS_CONTRAST_SETTING:
case OLYMPUS_CS_PM_CONTRAST:
case OLYMPUS_CS_PM_SATURATION:
case OLYMPUS_CS_PM_SHARPNESS:
case OLYMPUS_CS_SHARPNESS_SETTING:
{
final String[] values = value.getValues();
if (values.length != 3) return null;
return values[0] + " (" + values[1] + ',' + values[2] + ')';
}
case OLYMPUS_CS_PANORAMA_MODE:
{
if (value.getValueCount() != 2) break;
final int tagID = value.getOwningTagID();
return getTagValueLabelFor(tagID, value.getIntValue()) + ", " + value.getValues()[1];
}
case OLYMPUS_FOCAL_PLANE_DIAGONAL:
return value.getStringValue() + "mm"; // TODO: localize
}
return super.valueToString(value);
}
/**
* Encode an {@link IPTCDirectory}'s values into a {@link ByteBuffer} suitable for writing into a
* JPEG image file.
*
* @param includePhotoshopHeader If <code>true</code>, encode the Photoshop header as is needed in
* JPEG files.
* @return Returns said {@link ByteBuffer}.
*/
private ByteBuffer encodeImpl(boolean includePhotoshopHeader) {
final int encodedIPTCSize = calcEncodedIPTCSize();
int bufSize = encodedIPTCSize;
////////// Encode Photoshop IPTC header, if wanted ////////////////////
if (includePhotoshopHeader) bufSize += IPTC_JPEG_HEADER_SIZE;
//
// Ensure the buffer size is padded to be an even number of bytes.
//
final ByteBuffer buf = ByteBuffer.allocate(bufSize + (bufSize & 1));
if (includePhotoshopHeader) {
ByteBufferUtil.put(buf, PHOTOSHOP_3_IDENT, "ASCII");
buf.put((byte) 0);
ByteBufferUtil.put(buf, PHOTOSHOP_CREATOR_CODE, "ASCII");
buf.putShort(PHOTOSHOP_IPTC_RESOURCE_ID);
buf.putShort((short) 0); // resource name (empty)
buf.putInt(encodedIPTCSize);
}
////////// Now encode all the IPTC tags ///////////////////////////////
final Integer[] tagIDs = getTagIDSet(false).toArray(new Integer[] {null});
Arrays.sort(tagIDs);
for (int tagID : tagIDs) {
if (!tagIsIIM(tagID)) {
//
// Non-IIM tags can't be encoded into binary form.
//
continue;
}
final ImageMetaValue imValue = getValue(tagID);
switch (imValue.getType()) {
case META_SBYTE:
case META_UBYTE:
{
encodeTag(buf, tagID);
buf.putShort((short) 1);
buf.put(imValue.getStringValue().getBytes()[0]);
break;
}
case META_DATE:
{
encodeTag(buf, tagID);
String date = imValue.getStringValue();
date =
date.substring(0, 4)
+ // YYYY
date.substring(5, 7)
+ // MM
date.substring(8, 10); // DD
encodeString(buf, date);
break;
}
case META_SSHORT:
case META_USHORT:
{
encodeTag(buf, tagID);
buf.putShort((short) 2);
buf.putShort(imValue.getShortValue());
break;
}
case META_STRING:
{
for (String s : imValue.getValues()) {
encodeTag(buf, tagID);
encodeString(buf, s);
}
break;
}
default:
throw new IllegalStateException();
}
}
if ((bufSize & 1) != 0) {
//
// The number of encoded bytes is odd: pad to make even.
//
buf.put((byte) 0);
}
return buf;
}