public void Crc32ModeS_Timing_Test()
{
var crcCalculator = new Crc32ModeS();
var count = 1000000;
var fastShortTiming = DoTimingRun(crcCalculator, true, false, count);
var fastLongTiming = DoTimingRun(crcCalculator, true, true, count);
var slowShortTiming = DoTimingRun(crcCalculator, false, false, count);
var slowLongTiming = DoTimingRun(crcCalculator, false, true, count);
Assert.Inconclusive("Timings on {0:N0} messages: 'Fast' and short: {1}, 'Fast' and long: {2}, 'Slow' and short: {3}, 'Slow' and long: {4}",
count,
fastShortTiming, fastLongTiming,
slowShortTiming, slowLongTiming);
}
private TimeSpan DoTimingRun(Crc32ModeS calculator, bool useFastMethod, bool useLongMessage, int count)
{
var message = new byte[useLongMessage ? 11 : 4];
var random = new Random();
DateTime start, finish;
if (useFastMethod)
{
start = DateTime.UtcNow;
for (var i = 0; i < count; ++i)
{
random.NextBytes(message);
calculator.ComputeChecksumBytes(message, 0, message.Length);
}
finish = DateTime.UtcNow;
}
else if (useLongMessage)
{
start = DateTime.UtcNow;
for (var i = 0; i < count; ++i)
{
random.NextBytes(message);
calculator.ComputeChecksumBytesTraditional88(message);
}
finish = DateTime.UtcNow;
}
else
{
start = DateTime.UtcNow;
for (var i = 0; i < count; ++i)
{
random.NextBytes(message);
calculator.ComputeChecksumBytesTraditional32(message);
}
finish = DateTime.UtcNow;
}
return(finish - start);
}
/// <summary>
/// AVR ASCii Format Input
/// </summary>
/// <param name="avrline"></param>
/// <returns></returns>
public static Plane ReadMessage(string avrline)
{
if (!avrline.StartsWith("*"))
return null;
log.Debug(avrline);
avrline = avrline.Trim().TrimEnd(';');
ModeSMessage adsbmess = new ModeSMessage();
byte[] data = ConvertHexStringToByteArray(avrline.TrimStart('*'));
if (data.Length < 13)
return null;
adsbmess.DF = (byte)(data[0] >> 3); // 5
adsbmess.CA = (byte)(data[0] & 7); // 3
// aircraft icao
adsbmess.AA = (uint)((data[1] << 16) + (data[2] << 8) +(data[3])); // 24
Array.Copy(data, 4, adsbmess.adsbdata, 0, 7); // 56 bytes
// paraity
adsbmess.PI = (uint)((data[11] << 16) + (data[12] << 8) + (data[13])); // 24
adsbmess.recvtime = DateTime.Now;
// check parity
Crc32ModeS crc = new Crc32ModeS();
byte[] pidata = crc.ComputeChecksumBytes(data, 0, data.Length - 3, false);
if (adsbmess.PI != ((pidata[0] << 16) + (pidata[1] << 8) + pidata[2]))
{
Console.WriteLine("Parity Fail");
return null;
}
// create the plane id
string planeid = adsbmess.AA.ToString("X5");
if (!Planes.ContainsKey(planeid))
Planes[planeid] = new Plane() { ID = planeid };
if (adsbmess.DF == 17 &&
(adsbmess.TypeCode >= 9 && adsbmess.TypeCode <= 18)
|| (adsbmess.TypeCode >= 0x14 && adsbmess.TypeCode <= 0x16)
) // airbornepos
{
// odd
if (adsbmess.Fcprformat)
{
((Plane)Planes[adsbmess.AA.ToString("X5")]).llaodd = adsbmess;
//Console.WriteLine("adsb " + planeid + " type " + adsbmess.DF + " odd");
}
else // even
{
((Plane)Planes[adsbmess.AA.ToString("X5")]).llaeven = adsbmess;
//Console.WriteLine("adsb " + planeid + " type " + adsbmess.DF + " even");
}
}
else if (adsbmess.DF == 17 && adsbmess.TypeCode >= 1 && adsbmess.TypeCode <= 4) // ident
{
StringBuilder builder = new StringBuilder();
int count = 8;
for (int i = 0; i < count; i++)
{
char ch = '\0';
byte[] char1 = adsbmess.getbits(adsbmess.adsbdata, 7 + i * 6, 6);
byte num2 = char1[0];
if ((num2 > 0) && (num2 < 0x1b))
{
ch = (char)(0x41 + (num2 - 1));
}
else if (num2 == 0x20)
{
ch = ' ';
}
else if ((num2 > 0x2f) && (num2 < 0x3a))
{
ch = (char)(0x30 + (num2 - 0x30));
}
if (ch != '\0')
{
builder.Append(ch);
}
}
adsbmess.Ident = builder.ToString();
//Console.WriteLine("Ident " + builder.ToString());
}
else if (adsbmess.DF == 17 && adsbmess.TypeCode == 0x13) // velocity
{
int subtype = adsbmess.adsbdata[0] & 7;
int accuracy = (adsbmess.adsbdata[1] >> 3) & 15;
switch (subtype)
{
case 3:
case 4:
bool headingstatus = ((adsbmess.adsbdata[1] >> 2) & 1) > 0;
if (headingstatus)
{
ushort head = (ushort)(((adsbmess.adsbdata[1] & 3) << 8) + adsbmess.adsbdata[2]);
double heading = head * 0.3515625;
((Plane)Planes[adsbmess.AA.ToString("X5")]).heading = heading;
}
break;
case 1:
case 2:
default:
bool westvel = ((adsbmess.adsbdata[1] >> 2) & 1) > 0;
int ewvel = (int)(((adsbmess.adsbdata[1] & 3) << 8) + adsbmess.adsbdata[2]);
bool southvel = ((adsbmess.adsbdata[3] >> 7) & 1) > 0;
int nsvel = (int)(((adsbmess.adsbdata[3] & 127) << 3) + (adsbmess.adsbdata[4] >> 5));
if (westvel)
ewvel *= -1;
if (southvel)
nsvel *= -1;
double cog = (Math.Atan2(ewvel, nsvel) * (180 / Math.PI));
Console.WriteLine("vel " + ewvel + " " + nsvel + " " + cog);
((Plane)Planes[adsbmess.AA.ToString("X5")]).heading = (cog + 360) % 360;
break;
}
}
else
{
Console.WriteLine("No processing type 0x" + adsbmess.TypeCode.ToString("X2") + " DF " + adsbmess.DF);
}
return ((Plane)Planes[adsbmess.AA.ToString("X5")]);
}
/// <summary>
/// AVR ASCii Format Input
/// </summary>
/// <param name="avrline"></param>
/// <returns></returns>
public static Plane ReadMessage(string avrline)
{
if (!avrline.StartsWith("*"))
{
return(null);
}
log.Debug(avrline);
avrline = avrline.Trim().TrimEnd(';');
ModeSMessage adsbmess = new ModeSMessage();
byte[] data = ConvertHexStringToByteArray(avrline.TrimStart('*'));
if (data.Length < 13)
{
return(null);
}
adsbmess.DF = (byte)(data[0] >> 3); // 5
adsbmess.CA = (byte)(data[0] & 7); // 3
// aircraft icao
adsbmess.AA = (uint)((data[1] << 16) + (data[2] << 8) + (data[3])); // 24
Array.Copy(data, 4, adsbmess.adsbdata, 0, 7); // 56 bytes
// paraity
adsbmess.PI = (uint)((data[11] << 16) + (data[12] << 8) + (data[13])); // 24
adsbmess.recvtime = DateTime.Now;
// check parity
Crc32ModeS crc = new Crc32ModeS();
byte[] pidata = crc.ComputeChecksumBytes(data, 0, data.Length - 3, false);
if (adsbmess.PI != ((pidata[0] << 16) + (pidata[1] << 8) + pidata[2]))
{
Console.WriteLine("Parity Fail");
return(null);
}
// create the plane id
string planeid = adsbmess.AA.ToString("X5");
if (!Planes.ContainsKey(planeid))
{
Planes[planeid] = new Plane()
{
ID = planeid
}
}
;
if (adsbmess.DF == 17 &&
(adsbmess.TypeCode >= 9 && adsbmess.TypeCode <= 18) ||
(adsbmess.TypeCode >= 0x14 && adsbmess.TypeCode <= 0x16)
) // airbornepos
{
// odd
if (adsbmess.Fcprformat)
{
((Plane)Planes[adsbmess.AA.ToString("X5")]).llaodd = adsbmess;
//Console.WriteLine("adsb " + planeid + " type " + adsbmess.DF + " odd");
}
else // even
{
((Plane)Planes[adsbmess.AA.ToString("X5")]).llaeven = adsbmess;
//Console.WriteLine("adsb " + planeid + " type " + adsbmess.DF + " even");
}
}
else if (adsbmess.DF == 17 && adsbmess.TypeCode >= 1 && adsbmess.TypeCode <= 4) // ident
{
StringBuilder builder = new StringBuilder();
int count = 8;
for (int i = 0; i < count; i++)
{
char ch = '\0';
byte[] char1 = adsbmess.getbits(adsbmess.adsbdata, 7 + i * 6, 6);
byte num2 = char1[0];
if ((num2 > 0) && (num2 < 0x1b))
{
ch = (char)(0x41 + (num2 - 1));
}
else if (num2 == 0x20)
{
ch = ' ';
}
else if ((num2 > 0x2f) && (num2 < 0x3a))
{
ch = (char)(0x30 + (num2 - 0x30));
}
if (ch != '\0')
{
builder.Append(ch);
}
}
adsbmess.Ident = builder.ToString();
//Console.WriteLine("Ident " + builder.ToString());
}
else if (adsbmess.DF == 17 && adsbmess.TypeCode == 0x13) // velocity
{
int subtype = adsbmess.adsbdata[0] & 7;
int accuracy = (adsbmess.adsbdata[1] >> 3) & 15;
switch (subtype)
{
case 3:
case 4:
bool headingstatus = ((adsbmess.adsbdata[1] >> 2) & 1) > 0;
if (headingstatus)
{
ushort head = (ushort)(((adsbmess.adsbdata[1] & 3) << 8) + adsbmess.adsbdata[2]);
double heading = head * 0.3515625;
((Plane)Planes[adsbmess.AA.ToString("X5")]).heading = heading;
}
break;
case 1:
case 2:
default:
bool westvel = ((adsbmess.adsbdata[1] >> 2) & 1) > 0;
int ewvel = (int)(((adsbmess.adsbdata[1] & 3) << 8) + adsbmess.adsbdata[2]);
bool southvel = ((adsbmess.adsbdata[3] >> 7) & 1) > 0;
int nsvel = (int)(((adsbmess.adsbdata[3] & 127) << 3) + (adsbmess.adsbdata[4] >> 5));
if (westvel)
{
ewvel *= -1;
}
if (southvel)
{
nsvel *= -1;
}
double cog = (Math.Atan2(ewvel, nsvel) * (180 / Math.PI));
Console.WriteLine("vel " + ewvel + " " + nsvel + " " + cog);
((Plane)Planes[adsbmess.AA.ToString("X5")]).heading = (cog + 360) % 360;
break;
}
}
else
{
Console.WriteLine("No processing type 0x" + adsbmess.TypeCode.ToString("X2") + " DF " + adsbmess.DF);
}
return((Plane)Planes[adsbmess.AA.ToString("X5")]);
}