@Test
public void testRead1SPP64BPS() throws IOException {
// 1 sample per pixel, 64 bits per sample (gray)
FastByteArrayOutputStream out = new FastByteArrayOutputStream(32);
DataOutput dataOut = new DataOutputStream(out);
dataOut.writeLong(0x00000000);
dataOut.writeLong(81985529216486895L);
dataOut.writeLong(81985529216486895L);
dataOut.writeLong(-163971058432973790L);
InputStream in =
new HorizontalDeDifferencingStream(out.createInputStream(), 4, 1, 64, ByteOrder.BIG_ENDIAN);
DataInput dataIn = new DataInputStream(in);
// Row 1
assertEquals(0, dataIn.readLong());
assertEquals(81985529216486895L, dataIn.readLong());
assertEquals(163971058432973790L, dataIn.readLong());
assertEquals(0, dataIn.readLong());
// EOF
assertEquals(-1, in.read());
}
@Test
public void testRead1SPP32BPS() throws IOException {
// 1 sample per pixel, 32 bits per sample (gray)
FastByteArrayOutputStream out = new FastByteArrayOutputStream(16);
DataOutput dataOut = new DataOutputStream(out);
dataOut.writeInt(0x00000000);
dataOut.writeInt(305419896);
dataOut.writeInt(305419896);
dataOut.writeInt(-610839792);
InputStream in =
new HorizontalDeDifferencingStream(out.createInputStream(), 4, 1, 32, ByteOrder.BIG_ENDIAN);
DataInput dataIn = new DataInputStream(in);
// Row 1
assertEquals(0, dataIn.readInt());
assertEquals(305419896, dataIn.readInt());
assertEquals(610839792, dataIn.readInt());
assertEquals(0, dataIn.readInt());
// EOF
assertEquals(-1, in.read());
}
@Test
public void testRead3SPP16BPSLittleEndian() throws IOException {
FastByteArrayOutputStream out = new FastByteArrayOutputStream(24);
DataOutput dataOut = new LittleEndianDataOutputStream(out);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(4660);
dataOut.writeShort(30292);
dataOut.writeShort(4660);
dataOut.writeShort(4660);
dataOut.writeShort(30292);
dataOut.writeShort(4660);
dataOut.writeShort(-9320);
dataOut.writeShort(-60584);
dataOut.writeShort(-9320);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(0x0000);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(30292);
dataOut.writeShort(-60584);
dataOut.writeShort(-60584);
dataOut.writeShort(-60584);
InputStream in =
new HorizontalDeDifferencingStream(
out.createInputStream(), 4, 3, 16, ByteOrder.LITTLE_ENDIAN);
DataInput dataIn = new LittleEndianDataInputStream(in);
// Row 1
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(4660, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(4660, dataIn.readUnsignedShort());
assertEquals(9320, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(9320, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
// Row 2
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(30292, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(60584, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
assertEquals(0, dataIn.readUnsignedShort());
// EOF
assertEquals(-1, in.read());
}