public void runTest(Object ctx, int numReps) {
final Context ictx = (Context) ctx;
final ImageInputStream iis = ictx.inputStream;
final int length = ictx.length;
int pos = 0;
try {
iis.mark();
do {
if (pos + 4 > length) {
iis.reset();
iis.mark();
pos = 0;
}
iis.readFloat();
pos += 4;
} while (--numReps >= 0);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
iis.reset();
} catch (IOException e) {
}
}
}
/**
* reads an AOT LUT (BBDR breadboard procedure GA_read_LUT_AOD) * This LUT is equivalent to the
* original IDL LUT: for bd = 0, nm_bnd - 1 do $ for jj = 0, nm_aot - 1 do $ for ii = 0, nm_hsf -
* 1 do $ for k = 0, nm_azm - 1 do $ for j = 0, nm_asl - 1 do $ for i = 0, nm_avs - 1 do begin
* readu, 1, aux lut[*, i, j, nm_azm - k - 1, ii, jj, bd] = aux A LUT value can be accessed with
* lut.getValue(new double[]{wvlValue, aotValue, hsfValue, aziValue, szaValue, vzaValue,
* parameterValue});
*
* @param sensor The sensor
* @return LookupTable
* @throws java.io.IOException when failing to real LUT data
*/
public static AotLookupTable getAotLookupTable(Sensor sensor) throws IOException {
ImageInputStream iis = Luts.getAotLutData(sensor.getInstrument());
try {
// read LUT dimensions and values
float[] vza = Luts.readDimension(iis);
int nVza = vza.length;
float[] sza = Luts.readDimension(iis);
int nSza = sza.length;
float[] azi = Luts.readDimension(iis);
int nAzi = azi.length;
float[] hsf = Luts.readDimension(iis);
int nHsf = hsf.length;
// conversion from surf.pressure to elevation ASL
for (int i = 0; i < nHsf; i++) {
if (hsf[i] != -1) {
// 1.e-3 * (1.d - (xnodes[3, wh_nod] / 1013.25)^(1./5.25588)) / 2.25577e-5
final double a = hsf[i] / 1013.25;
final double b = 1. / 5.25588;
hsf[i] = (float) (0.001 * (1.0 - Math.pow(a, b)) / 2.25577E-5);
}
}
float[] aot = Luts.readDimension(iis);
int nAot = aot.length;
float[] parameters = new float[] {1.0f, 2.0f, 3.0f, 4.0f, 5.0f};
int nParameters = parameters.length;
float[] wvl = sensor.getWavelength();
final int nWvl = wvl.length;
float[] tgLut = new float[nParameters * nVza * nSza * nAzi * nHsf * nAot * nWvl];
for (int iWvl = 0; iWvl < nWvl; iWvl++) {
for (int iAot = 0; iAot < nAot; iAot++) {
for (int iHsf = 0; iHsf < nHsf; iHsf++) {
for (int iAzi = 0; iAzi < nAzi; iAzi++) {
for (int iSza = 0; iSza < nSza; iSza++) {
for (int iVza = 0; iVza < nVza; iVza++) {
for (int iParams = 0; iParams < nParameters; iParams++) {
int iAziTemp = nAzi - iAzi - 1;
int i =
iParams
+ nParameters
* (iVza
+ nVza
* (iSza
+ nSza
* (iAziTemp
+ nAzi
* (iHsf + nHsf * (iAot + nAot * iWvl)))));
tgLut[i] = iis.readFloat();
}
}
}
}
}
}
}
Luts.readDimension(iis, nWvl); // skip wavelengths
float[] solarIrradiances = Luts.readDimension(iis, nWvl);
// store in original sequence (see breadboard: loop over bd, jj, ii, k, j, i in
// GA_read_lut_AOD
AotLookupTable aotLut = new AotLookupTable();
aotLut.setLut(new LookupTable(tgLut, wvl, aot, hsf, azi, sza, vza, parameters));
aotLut.setWvl(wvl);
aotLut.setSolarIrradiance(solarIrradiances);
return aotLut;
} finally {
iis.close();
}
}
public void initialize(
ImageInputStream stream, boolean ignoreUnknownFields, final boolean isBTIFF)
throws IOException {
removeTIFFFields();
List tagSetList = getTagSetList();
final long numEntries;
if (isBTIFF) numEntries = stream.readLong();
else numEntries = stream.readUnsignedShort();
for (int i = 0; i < numEntries; i++) {
// Read tag number, value type, and value count.
int tag = stream.readUnsignedShort();
int type = stream.readUnsignedShort();
int count;
if (isBTIFF) {
long count_ = stream.readLong();
count = (int) count_;
if (count != count_)
throw new IllegalArgumentException("unable to use long number of values");
} else count = (int) stream.readUnsignedInt();
// Get the associated TIFFTag.
TIFFTag tiffTag = getTag(tag, tagSetList);
// Ignore unknown fields.
if (ignoreUnknownFields && tiffTag == null) {
// Skip the value/offset so as to leave the stream
// position at the start of the next IFD entry.
if (isBTIFF) stream.skipBytes(8);
else stream.skipBytes(4);
// XXX Warning message ...
// Continue with the next IFD entry.
continue;
}
long nextTagOffset;
if (isBTIFF) {
nextTagOffset = stream.getStreamPosition() + 8;
int sizeOfType = TIFFTag.getSizeOfType(type);
if (count * sizeOfType > 8) {
long value = stream.readLong();
stream.seek(value);
}
} else {
nextTagOffset = stream.getStreamPosition() + 4;
int sizeOfType = TIFFTag.getSizeOfType(type);
if (count * sizeOfType > 4) {
long value = stream.readUnsignedInt();
stream.seek(value);
}
}
if (tag == BaselineTIFFTagSet.TAG_STRIP_BYTE_COUNTS
|| tag == BaselineTIFFTagSet.TAG_TILE_BYTE_COUNTS
|| tag == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH) {
this.stripOrTileByteCountsPosition = stream.getStreamPosition();
if (LAZY_LOADING) {
type = type == TIFFTag.TIFF_LONG ? TIFFTag.TIFF_LAZY_LONG : TIFFTag.TIFF_LAZY_LONG8;
}
} else if (tag == BaselineTIFFTagSet.TAG_STRIP_OFFSETS
|| tag == BaselineTIFFTagSet.TAG_TILE_OFFSETS
|| tag == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT) {
this.stripOrTileOffsetsPosition = stream.getStreamPosition();
if (LAZY_LOADING) {
type = type == TIFFTag.TIFF_LONG ? TIFFTag.TIFF_LAZY_LONG : TIFFTag.TIFF_LAZY_LONG8;
}
}
Object obj = null;
try {
switch (type) {
case TIFFTag.TIFF_BYTE:
case TIFFTag.TIFF_SBYTE:
case TIFFTag.TIFF_UNDEFINED:
case TIFFTag.TIFF_ASCII:
byte[] bvalues = new byte[count];
stream.readFully(bvalues, 0, count);
if (type == TIFFTag.TIFF_ASCII) {
// Can be multiple strings
final List<String> v = new ArrayList<String>();
boolean inString = false;
int prevIndex = 0;
for (int index = 0; index <= count; index++) {
if (index < count && bvalues[index] != 0) {
if (!inString) {
// start of string
prevIndex = index;
inString = true;
}
} else { // null or special case at end of string
if (inString) {
// end of string
final String s = new String(bvalues, prevIndex, index - prevIndex);
v.add(s);
inString = false;
}
}
}
count = v.size();
String[] strings;
if (count != 0) {
strings = new String[count];
for (int c = 0; c < count; c++) {
strings[c] = v.get(c);
}
} else {
// This case has been observed when the value of
// 'count' recorded in the field is non-zero but
// the value portion contains all nulls.
count = 1;
strings = new String[] {""};
}
obj = strings;
} else {
obj = bvalues;
}
break;
case TIFFTag.TIFF_SHORT:
char[] cvalues = new char[count];
for (int j = 0; j < count; j++) {
cvalues[j] = (char) (stream.readUnsignedShort());
}
obj = cvalues;
break;
case TIFFTag.TIFF_LONG:
case TIFFTag.TIFF_IFD_POINTER:
long[] lvalues = new long[count];
for (int j = 0; j < count; j++) {
lvalues[j] = stream.readUnsignedInt();
}
obj = lvalues;
break;
case TIFFTag.TIFF_RATIONAL:
long[][] llvalues = new long[count][2];
for (int j = 0; j < count; j++) {
llvalues[j][0] = stream.readUnsignedInt();
llvalues[j][1] = stream.readUnsignedInt();
}
obj = llvalues;
break;
case TIFFTag.TIFF_SSHORT:
short[] svalues = new short[count];
for (int j = 0; j < count; j++) {
svalues[j] = stream.readShort();
}
obj = svalues;
break;
case TIFFTag.TIFF_SLONG:
int[] ivalues = new int[count];
for (int j = 0; j < count; j++) {
ivalues[j] = stream.readInt();
}
obj = ivalues;
break;
case TIFFTag.TIFF_SRATIONAL:
int[][] iivalues = new int[count][2];
for (int j = 0; j < count; j++) {
iivalues[j][0] = stream.readInt();
iivalues[j][1] = stream.readInt();
}
obj = iivalues;
break;
case TIFFTag.TIFF_FLOAT:
float[] fvalues = new float[count];
for (int j = 0; j < count; j++) {
fvalues[j] = stream.readFloat();
}
obj = fvalues;
break;
case TIFFTag.TIFF_DOUBLE:
double[] dvalues = new double[count];
for (int j = 0; j < count; j++) {
dvalues[j] = stream.readDouble();
}
obj = dvalues;
break;
case TIFFTag.TIFF_LONG8:
case TIFFTag.TIFF_SLONG8:
case TIFFTag.TIFF_IFD8:
long[] lBvalues = new long[count];
for (int j = 0; j < count; j++) {
lBvalues[j] = stream.readLong();
}
obj = lBvalues;
break;
case TIFFTag.TIFF_LAZY_LONG8:
case TIFFTag.TIFF_LAZY_LONG:
obj = new TIFFLazyData(stream, type, count);
break;
default:
// XXX Warning
break;
}
} catch (EOFException eofe) {
// The TIFF 6.0 fields have tag numbers less than or equal
// to 532 (ReferenceBlackWhite) or equal to 33432 (Copyright).
// If there is an error reading a baseline tag, then re-throw
// the exception and fail; otherwise continue with the next
// field.
if (BaselineTIFFTagSet.getInstance().getTag(tag) == null) {
throw eofe;
}
}
if (tiffTag == null) {
// XXX Warning: unknown tag
} else if (!tiffTag.isDataTypeOK(type)) {
// XXX Warning: bad data type
} else if (tiffTag.isIFDPointer() && obj != null) {
stream.mark();
stream.seek(((long[]) obj)[0]);
List tagSets = new ArrayList(1);
tagSets.add(tiffTag.getTagSet());
TIFFIFD subIFD = new TIFFIFD(tagSets);
// XXX Use same ignore policy for sub-IFD fields?
subIFD.initialize(stream, ignoreUnknownFields);
obj = subIFD;
stream.reset();
}
if (tiffTag == null) {
tiffTag = new TIFFTag(null, tag, 1 << type, null);
}
// Add the field if its contents have been initialized which
// will not be the case if an EOF was ignored above.
if (obj != null) {
TIFFField f = new TIFFField(tiffTag, type, count, obj);
addTIFFField(f);
}
stream.seek(nextTagOffset);
}
this.lastPosition = stream.getStreamPosition();
}
