public void TestFingerprintConstruction1()
{
var fingerprint = Fingerprint.Parse("01 28 12345612 800000123456789A 800000ABCDEF0123");
Assert.AreEqual(0x12345612U, fingerprint.Timecode);
Assert.AreEqual("12:34:56:12", fingerprint.ToString());
Assert.AreEqual(40, fingerprint.AudioSize);
Assert.AreEqual(Analyser.CHANNELS, fingerprint.AudioFingerprints.Length);
Assert.AreEqual(0x800000123456789AUL, fingerprint.AudioFingerprints[0]);
Assert.AreEqual(0x800000ABCDEF0123UL, fingerprint.AudioFingerprints[1]);
Assert.IsTrue(fingerprint.AudioFingerprints.Skip(2).All(f => f == 0));
}
public void TestEmptyMatch()
{
bool presentA, presentB;
var fingerprints = audioFingerprints.Select(a => Fingerprint.Parse($"01 28 12345612 800000{a}")).ToList();
var empty = audioFingerprints.Select(a => Fingerprint.Parse($"01 28 12345612 0000000000000000")).ToList();
var corr1 = AudioCorrelator.Correlate(0, empty.Skip(5), 15, fingerprints, 25, out presentA, out presentB);
CollectionAssert.AreEqual(null, corr1);
Assert.IsFalse(presentA);
Assert.IsTrue(presentB);
var corr2 = AudioCorrelator.Correlate(0, fingerprints.Skip(5), 15, empty, 25, out presentA, out presentB);
CollectionAssert.AreEqual(null, corr2);
Assert.IsTrue(presentA);
Assert.IsFalse(presentB);
}
internal static IEnumerable <Attribute> ParseAttributes(
IEnumerable <byte> bytes,
byte[] transactionId = null
)
{
while (bytes.Any())
{
var type = (Attribute.AttributeType)bytes.Take(2).ToUShort();
ushort length = bytes.Skip(2).Take(2).ToUShort();
byte[] payload = bytes.Skip(4).Take(length).ToArray();
switch (type)
{
case Attribute.AttributeType.ErrorCode:
yield return(ErrorCode.Parse(payload));
break;
case Attribute.AttributeType.Realm:
yield return(Realm.Parse(payload));
break;
case Attribute.AttributeType.Nonce:
yield return(Stun.Attributes.Nonce.Parse(payload));
break;
case Attribute.AttributeType.Software:
yield return(Software.Parse(payload));
break;
case Attribute.AttributeType.Fingerprint:
yield return(Fingerprint.Parse(payload));
break;
case Attribute.AttributeType.XorMappedAddress:
yield return(XorMappedAddress.Parse(
payload, transactionId));
break;
case Attribute.AttributeType.XorRelayedAddress:
yield return(XorRelayedAddress.Parse(
payload, transactionId));
break;
case Attribute.AttributeType.ConnectionId:
yield return(new ConnectionId(payload));
break;
case Attribute.AttributeType.Lifetime:
yield return(new Lifetime((int)payload.ToUInt()));
break;
}
// Detect padding
var padBytes = (ushort)((4 + length) % 4);
if (padBytes > 0)
{
length += padBytes;
}
bytes = bytes.Skip(4 + length);
}
}
public void TestExactMatch()
{
var expected = new[]
{ -52, -46, -47, -46, -65, -62, -74, -66, -64, -63,
-57, -55, -62, -65, -70, -60, -68, -64, -63, -58,
-59, -54, -74, -45, -58, -63, -63, -44, -75, -72,
-62, -56, -61, -53, -78, -67, -62, -67, -57, -59,
-74, -66, -65, -58, -101, -72, -66, -56, -62, -77,
-71, -69, -52, -63, -84, -64, -58, -58, -59, -66,
-83, -86, -86, -73, -76, -75, -79, -74, -73, -62,
-86, -70, -63, -67, -56, -73, -60, -79, -81, -49,
-87, -63, -68, -51, -64, -47, -81, -71, -63, -72,
-70, -74, -53, -66, -75, -67, -97, -71, -58, -73,
-76, -65, -81, -82, -83, -84, -84, -77, -68, -63,
-67, -55, -96, -82, -63, -60, -67, -58, -56, -62,
-55, -55, -64, -69, -70, -71, -41, -67, -63, -60,
-56, -66, -71, -94, -79, -65, -67, -59, -48, -91,
-68, -77, -57, -80, -61, -82, -76, -61, -64, -71,
-65, -57, -74, -62, -45, -46, -49, -50, -60, -74,
-40, -74, -51, -62, -61, -70, -72, -42, -54, -53,
-85, -55, -88, -47, -48, -78, -66, -78, -71, -86,
-59, -78, -74, -73, -38, -85, -79, -66, -89, -72,
-68, -76, -65, -51, -58, -77, -86, -83, -73, -67,
256, -42, -51, -64, -63, -48, -34, -24, -40, -47, // Correlation spike at start of line
-45, -47, -70, -45, -58, -58, -10, -52, -53, -60,
-39, -68, -48, -53, -46, -57, -29, -30, -71, -36,
-64, -36, -27, -17, -48, -51, -42, -39, -37, -57,
-39, -63, -52, -49, -44, -41, -53, -69, -65, -54,
-60, -70, -63, -60, -79, -87, -55, -75, -52, -67,
-62, -85, -55, -56, -57, -66, -70, -81, -66, -61,
-55, -59, -58, -66, -37, -54, -63, -66, -70, -48,
-62, -60, -47, -62, -65, -54, -56, -86, -108, -57,
-57, -63, -70, -71, -82, -64, -90, -72, -77, -70,
-75, -64, -58, -63, -88, -63, -75, -68, -59, -68,
-68, -76, -65, -77, -78, -53, -70, -59, -81, -59,
-80, -56, -77, -88, -57, -64, -46, -58, -66, -73,
-75, -67, -80, -69, -64, -52, -62, -68, -79, -82,
-77, -56, -46, -49, -48, -61, -73, -60, -47, -66,
-62, -60, -61, -49, -52, -65, -88, -49, -67, -61,
-67, -47, -62, -71, -68, -73, -77, -49, -69, -64,
-56, -72, -89, -56, -71, -67, -65, -41, -74, -67,
-74, -63, -79, -56, -51, -50, -68, -69, -76, -55,
-71, -67, -66, -64, -71, -76, -63, -64, -48, -74 };
bool presentA, presentB;
// Fingerprints for second channel have data (A5A5A5) in the unused bits of the audio fingerprint
var fingerprints =
audioFingerprints.Select(a => Fingerprint.Parse($"01 28 12345612 800000{a} A5A5A5{a}")).ToList();
var corr1 = AudioCorrelator.Correlate(0, fingerprints.Skip(5), 15, fingerprints, 25, out presentA, out presentB);
CollectionAssert.AreEqual(expected, corr1);
Assert.IsTrue(presentA);
Assert.IsTrue(presentB);
// Check that unused fingerprint bits are ignored
var corr2 = AudioCorrelator.Correlate(1, fingerprints.Skip(5), 15, fingerprints, 25, out presentA, out presentB);
CollectionAssert.AreEqual(expected, corr2);
Assert.IsTrue(presentA);
Assert.IsTrue(presentB);
}
