public void Generate(String filename)
{
AppDomain ad = Thread.GetDomain(); //AppDomain.CreateDomain("First", null, null);
AssemblyName an = new AssemblyName();
an.Name = filename + ".exe"; //AssemblyName.CreateSimpleName(filename + ".exe", "LispExe", "Lisp Executable", "default_alias");
AssemblyBuilder ab = ad.DefineDynamicAssembly(an, AssemblyBuilderAccess.RunAndSave);
ModuleBuilder mb = ab.DefineDynamicModule(filename + ".exe", filename + ".exe");
MethodBuilder methodb;
//DescriptorInfo di = new DescriptorInfo(0);
tb = mb.DefineType(filename);
//di.SetReturnType(typeof(void));
//di.MethodAttributes = MethodAttributes.Static | MethodAttributes.Public;
methodb = tb.DefineMethod("Main", MethodAttributes.Static | MethodAttributes.Public, typeof(void), null);
il = methodb.GetILGenerator();
do{
expr.Head.Visit(this);
if (expr.Head is FunctionDef)
GenerateDefStub(((FunctionDef)expr.Head).Name);
else if (expr.Head is GlobalVarDef)
GenerateDefStub(((GlobalVarDef)expr.Head).Name);
else if (expr.Head.ExpType == typeof(int))
GenerateNumericExpStub();
else if (expr.Head.ExpType == typeof(bool))
GenerateBoolExpStub();
else if (expr.Head.ExpType == typeof(CList))
GenerateListExpStub();
expr = expr.Tail;
}while(expr != null);
il.Emit(OpCodes.Ret);
tb.CreateType();
ab.SetEntryPoint((mb.GetType(filename)).GetMethod("Main"));
ab.Save(filename + ".exe");
}
public void WavOpusSimilarity()
{
string opusFingerprint;
string pcmFingerprint;
// cut out 30 second from the middle of the file
var opusDataSection = new short[330750];
var pcmDataSection = new short[330750];
Buffer.BlockCopy(opusData, 330750, opusDataSection, 0, 330750);
Buffer.BlockCopy(pcmData, 340775, pcmDataSection, 0, 330750); // starts 1 sec later than opus section
// generate fingerprints
var echoPrint = new CodeGen();
opusFingerprint = echoPrint.Generate(opusDataSection);
pcmFingerprint = echoPrint.Generate(pcmDataSection);
byte[] unbase64edOpusFingerprint = Convert.FromBase64String(opusFingerprint.Replace('-', '+').Replace('_', '/'));
string unzippedOpusFingerprint = ZlibStream.UncompressString(unbase64edOpusFingerprint);
byte[] unbase64edPcmFingerprint = Convert.FromBase64String(pcmFingerprint.Replace('-', '+').Replace('_', '/'));
string unzippedPcmFingerprint = ZlibStream.UncompressString(unbase64edPcmFingerprint);
// compute Damereau-Levenshein Distance in absence of actual fingerprint matching algorithm
int similarity = ComputeLevenshteinDistance(unzippedOpusFingerprint, unzippedPcmFingerprint);
float averageDifferencePerCharacter = (float)similarity / (unzippedOpusFingerprint.Length + unzippedPcmFingerprint.Length / 2);
Assert.Less(averageDifferencePerCharacter, 0.4);
Assert.Greater(averageDifferencePerCharacter, 0.001);
}
