@Test
public void test() {
byte[] segment = new byte[20000];
new Random().nextBytes(segment);
Decoder decoder = createDecoder(segment.length, 20);
Encoder encoder = createEncoder(segment, 0, segment.length, 20);
while (!decoder.isDecoded()) {
byte[] packet = new byte[20 + segment.length / 20];
encoder.getPacket(packet, 0);
decoder.addPacket(packet, 0);
}
byte[] decodedSegment = new byte[segment.length];
decoder.getSegment(decodedSegment, 0);
assertArrayEquals(segment, decodedSegment);
}
@Test
public void testLinearDependance() {
byte[] segment = new byte[1000];
new Random().nextBytes(segment);
Decoder decoder = createDecoder(segment.length, 10);
byte[] packet = new byte[10 + segment.length / 10];
Encoder encoder = createEncoder(segment, 0, segment.length, 10);
encoder.getPacket(packet, 0);
decoder.addPacket(packet, 0);
decoder.addPacket(packet, 0);
assertEquals(1, decoder.getRank());
while (!decoder.isDecoded()) {
byte[] packet2 = new byte[10 + segment.length / 10];
encoder.getPacket(packet2, 0);
decoder.addPacket(packet2, 0);
}
byte[] decodedSegment = new byte[segment.length];
decoder.getSegment(decodedSegment, 0);
assertArrayEquals(segment, decodedSegment);
}
@Test
public void testOnlineCoding() {
byte[] segment = new byte[1000];
new Random().nextBytes(segment);
Decoder decoder = createDecoder(segment.length, 20);
Decoder decoder2 = createDecoder(segment.length, 20);
Encoder encoder = createEncoder(segment, 0, segment.length, 20);
while (!decoder.isDecoded()) {
byte[] packet = new byte[segment.length / 20 + 20];
encoder.getPacket(packet, 0);
int prevRank = decoder.getRank();
decoder.addPacket(packet, 0);
if (prevRank < decoder.getRank()) {
prevRank = decoder2.getRank();
while (decoder2.getRank() == prevRank) {
byte[] packet2 = new byte[segment.length / 20 + 20];
decoder.getPacket(packet2, 0);
decoder2.addPacket(packet2, 0);
}
}
}
byte[] segmentDecoded = new byte[segment.length];
decoder.getSegment(segmentDecoded, 0);
assertArrayEquals(segment, segmentDecoded);
decoder2.getSegment(segmentDecoded, 0);
assertArrayEquals(segment, segmentDecoded);
}
@Test
public void testGB() {
byte[] segment = new byte[22500];
new Random().nextBytes(segment);
byte[][] packets = new byte[25][25 + 900];
long startTime = System.currentTimeMillis();
Encoder encoder = createEncoder(segment, 0, segment.length, 25);
for (int i = 0; i < 1000; i++) {
for (int j = 0; j < 25; j++) {
encoder.getPacket(packets[j], 0);
}
}
System.out.println(
"Rate:"
+ (8 * 1000.0 * segment.length) / (double) (System.currentTimeMillis() - startTime)
+ " kbps");
startTime = System.currentTimeMillis();
for (int i = 0; i < 1000; i++) {
Decoder decoder = createDecoder(segment.length, 25);
for (int j = 0; j < 25; j++) {
decoder.addPacket(packets[j], 0);
}
byte[] decodedSegment = new byte[segment.length];
decoder.getSegment(decodedSegment, 0);
}
System.out.println(
"Rate:"
+ (8 * 1000.0 * segment.length) / (double) (System.currentTimeMillis() - startTime)
+ " kbps");
}