/// <summary>
/// Query the database for perceptually similar tracks using the sound fingerprinting methods
/// </summary>
/// <param name="filePath">input file</param>
/// <returns>a dictionary of similar tracks</returns>
public static Dictionary<Track, double> SimilarTracksSoundfingerprinting(FileInfo filePath, Repository repository)
{
DbgTimer t = new DbgTimer();
t.Start ();
// get work config from the audio file
WorkUnitParameterObject param = GetWorkUnitParameterObjectFromAudioFile(filePath);
param.FingerprintingConfiguration = fingerprintingConfigQuerying;
Dictionary<Track, double> candidates = repository.FindSimilarFromAudioSamples(param.FingerprintingConfiguration.NumberOfHashTables, param.FingerprintingConfiguration.NumberOfKeys, 1, param);
Dbg.WriteLine ("SimilarTracksSoundfingerprinting - Total Execution Time: {0} ms", t.Stop().TotalMilliseconds);
return candidates;
}
// TODO: Rememeber to use another stride when querying
public static Dictionary<Track, double> SimilarTracksSoundfingerprinting(FileInfo filePath)
{
DbgTimer t = new DbgTimer();
t.Start ();
FindSimilar.AudioProxies.BassProxy bass = FindSimilar.AudioProxies.BassProxy.Instance;
float[] audiodata = AudioFileReader.Decode(filePath.FullName, SAMPLING_RATE, SECONDS_TO_ANALYZE);
if (audiodata == null || audiodata.Length == 0) {
Dbg.WriteLine("Error! - No Audio Found");
return null;
}
// Name of file being processed
string name = StringUtils.RemoveNonAsciiCharacters(Path.GetFileNameWithoutExtension(filePath.Name));
// Calculate duration in ms
double duration = (double) audiodata.Length / SAMPLING_RATE * 1000;
// Explode samples to the range of 16 bit shorts (–32,768 to 32,767)
// Matlab multiplies with 2^15 (32768)
// e.g. if( max(abs(speech))<=1 ), speech = speech * 2^15; end;
MathUtils.Multiply(ref audiodata, AUDIO_MULTIPLIER); // 65536
// zero pad if the audio file is too short to perform a mfcc
if (audiodata.Length < (fingerprintingConfig.WdftSize + fingerprintingConfig.Overlap))
{
int lenNew = fingerprintingConfig.WdftSize + fingerprintingConfig.Overlap;
Array.Resize<float>(ref audiodata, lenNew);
}
// Get fingerprint signatures using the Soundfingerprinting methods
// Get database
DatabaseService databaseService = DatabaseService.Instance;
IPermutations permutations = new LocalPermutations("Soundfingerprinting\\perms.csv", ",");
Repository repository = new Repository(permutations, databaseService, fingerprintService);
// work config
WorkUnitParameterObject param = new WorkUnitParameterObject();
param.FingerprintingConfiguration = fingerprintingConfig;
param.PathToAudioFile = filePath.FullName;
param.AudioSamples = audiodata;
param.MillisecondsToProcess = SECONDS_TO_ANALYZE * 1000;
param.StartAtMilliseconds = 0;
Dictionary<Track, double> candidates = repository.FindSimilarFromAudioSamples(25, 4, 2, param);
return candidates;
/*
// Use var keyword to enumerate dictionary
foreach (var pair in candidates)
{
Console.WriteLine("{0} - {1:0.00}",
pair.Key.Title,
pair.Value);
}
*/
Dbg.WriteLine ("Soundfingerprinting - Total Execution Time: {0} ms", t.Stop().TotalMilliseconds);
}