/// <summary>Get Distance</summary>
/// <seealso cref="">comirva.audio.feature.AudioFeature#GetDistance(comirva.audio.feature.AudioFeature)</seealso>
public override double GetDistance(AudioFeature f, AudioFeature.DistanceType t)
{
if(!(f is MandelEllis))
{
new Exception("Can only handle AudioFeatures of type Mandel Ellis, not of: "+f);
return -1;
}
MandelEllis other = (MandelEllis)f;
DistanceMeasure distanceMeasure = DistanceMeasure.Euclidean;
switch (t) {
case AudioFeature.DistanceType.Dtw_Euclidean:
distanceMeasure = DistanceMeasure.Euclidean;
break;
case AudioFeature.DistanceType.Dtw_SquaredEuclidean:
distanceMeasure = DistanceMeasure.SquaredEuclidean;
break;
case AudioFeature.DistanceType.Dtw_Manhattan:
distanceMeasure = DistanceMeasure.Manhattan;
break;
case AudioFeature.DistanceType.Dtw_Maximum:
distanceMeasure = DistanceMeasure.Maximum;
break;
case AudioFeature.DistanceType.KullbackLeiblerDivergence:
default:
return KullbackLeibler(this.gmmMe, other.gmmMe) + KullbackLeibler(other.gmmMe, this.gmmMe);
}
Dtw dtw = new Dtw(this.GetArray(), other.GetArray(), distanceMeasure, true, true, null, null, null);
return dtw.GetCost();
}
private static void FindSimilar(string path, Db db, Analyzer.AnalysisMethod analysisMethod, int numToTake=25, double percentage=0.2, AudioFeature.DistanceType distanceType = AudioFeature.DistanceType.KullbackLeiblerDivergence) {
var similarTracks = SimilarTracks(path, db, analysisMethod, numToTake, percentage, distanceType);
foreach (var entry in similarTracks)
{
Console.WriteLine("{0}, {1}", entry.Key, entry.Value);
}
}
/// <summary>Get Distance</summary>
/// <seealso cref="">comirva.audio.feature.AudioFeature#GetDistance(comirva.audio.feature.AudioFeature)</seealso>
public override double GetDistance(AudioFeature f)
{
if(!(f is MandelEllis))
{
new Exception("Can only handle AudioFeatures of type Mandel Ellis, not of: "+f);
return -1;
}
MandelEllis other = (MandelEllis)f;
return KullbackLeibler(this.gmmMe, other.gmmMe) + KullbackLeibler(other.gmmMe, this.gmmMe);
}
/// <summary>Get Distance</summary>
/// <seealso cref="">comirva.audio.feature.AudioFeature#GetDistance(comirva.audio.feature.AudioFeature)</seealso>
public override double GetDistance(AudioFeature f)
{
if (!(f is MandelEllis))
{
new Exception("Can only handle AudioFeatures of type Mandel Ellis, not of: " + f);
return(-1);
}
MandelEllis other = (MandelEllis)f;
return(KullbackLeibler(this.gmmMe, other.gmmMe) + KullbackLeibler(other.gmmMe, this.gmmMe));
}
/// <summary>Get Distance</summary>
/// <seealso cref="">comirva.audio.feature.AudioFeature#GetDistance(comirva.audio.feature.AudioFeature)</seealso>
public override double GetDistance(AudioFeature f, AudioFeature.DistanceType t)
{
if (!(f is MandelEllis))
{
new Exception("Can only handle AudioFeatures of type Mandel Ellis, not of: " + f);
return(-1);
}
MandelEllis other = (MandelEllis)f;
DistanceMeasure distanceMeasure = DistanceMeasure.Euclidean;
switch (t)
{
case AudioFeature.DistanceType.Dtw_Euclidean:
distanceMeasure = DistanceMeasure.Euclidean;
break;
case AudioFeature.DistanceType.Dtw_SquaredEuclidean:
distanceMeasure = DistanceMeasure.SquaredEuclidean;
break;
case AudioFeature.DistanceType.Dtw_Manhattan:
distanceMeasure = DistanceMeasure.Manhattan;
break;
case AudioFeature.DistanceType.Dtw_Maximum:
distanceMeasure = DistanceMeasure.Maximum;
break;
case AudioFeature.DistanceType.KullbackLeiblerDivergence:
default:
return(KullbackLeibler(this.gmmMe, other.gmmMe) + KullbackLeibler(other.gmmMe, this.gmmMe));
}
Dtw dtw = new Dtw(this.GetArray(), other.GetArray(), distanceMeasure, true, true, null, null, null);
return(dtw.GetCost());
}
public override double GetDistance(AudioFeature f)
{
if(!(f is Scms))
{
new Exception("Can only handle AudioFeatures of type Scms, not of: "+f);
return -1;
}
Scms other = (Scms)f;
return Distance(this, other, new ScmsConfiguration(Analyzer.MFCC_COEFFICIENTS));
}
/// <summary>
/// Add a track to the database
/// </summary>
/// <param name="audioFeature">the audiofeature object</param>
/// <returns>-1 if failed otherwise the track-id passed</returns>
public int AddTrack(AudioFeature audioFeature)
{
IDbDataParameter dbAudioFeatureParam = new SQLiteParameter("@audioFeature", DbType.Binary);
IDbDataParameter dbNameParam = new SQLiteParameter("@name", DbType.String);
IDbDataParameter dbDurationParam = new SQLiteParameter("@duration", DbType.Int64);
IDbDataParameter dbBitStringParam = new SQLiteParameter("@bitstring", DbType.String);
IDbCommand dbcmd;
lock (dbcon) {
dbcmd = dbcon.CreateCommand();
}
dbcmd.CommandText = "INSERT INTO mirage (audioFeature, name, duration, bitstring) " +
"VALUES (@audioFeature, @name, @duration, @bitstring); SELECT last_insert_rowid();";
dbcmd.Parameters.Add(dbAudioFeatureParam);
dbcmd.Parameters.Add(dbNameParam);
dbcmd.Parameters.Add(dbDurationParam);
dbcmd.Parameters.Add(dbBitStringParam);
dbAudioFeatureParam.Value = audioFeature.ToBytes();
dbNameParam.Value = audioFeature.Name;
dbDurationParam.Value = audioFeature.Duration;
dbBitStringParam.Value = audioFeature.BitString;
int trackid = -1;
try {
dbcmd.Prepare();
//dbcmd.ExecuteNonQuery();
trackid = Convert.ToInt32(dbcmd.ExecuteScalar());
dbcmd.Dispose();
} catch (Exception) {
return -1;
}
return trackid;
}
/// <summary>
/// Find Similar Tracks to one or many audio files using their unique database id(s)
/// </summary>
/// <param name="id">an array of unique database ids for the audio files to search for similar matches</param>
/// <param name="exclude">an array of unique database ids to ignore (normally the same as the id array)</param>
/// <param name="db">database</param>
/// <param name="analysisMethod">analysis method (SCMS or MandelEllis)</param>
/// <param name="numToTake">max number of entries to return</param>
/// <param name="percentage">percentage below and above the duration in ms when querying (used if between 0.1 - 0.9)</param>
/// <param name="distanceType">distance method to use (KullbackLeiblerDivergence is default)</param>
/// <returns>a list of query results</returns>
public static List<FindSimilar.QueryResult> SimilarTracksList(int[] id, int[] exclude, Db db, Analyzer.AnalysisMethod analysisMethod, int numToTake=25, double percentage=0.2, AudioFeature.DistanceType distanceType = AudioFeature.DistanceType.KullbackLeiblerDivergence) {
AudioFeature[] seedAudioFeatures = null;
AudioFeature[] audioFeatures = null;
switch (analysisMethod) {
case Analyzer.AnalysisMethod.MandelEllis:
seedAudioFeatures = new MandelEllis[id.Length];
audioFeatures = new MandelEllis[100];
break;
case Analyzer.AnalysisMethod.SCMS:
seedAudioFeatures = new Scms[id.Length];
audioFeatures = new Scms[100];
break;
}
for (int i = 0; i < seedAudioFeatures.Length; i++) {
seedAudioFeatures[i] = db.GetTrack(id[i], analysisMethod);
}
// Get all tracks from the DB except the seedSongs
IDataReader r = db.GetTracks(exclude, seedAudioFeatures[0].Duration, percentage);
// store results in a query results list
List<FindSimilar.QueryResult> queryResultList = new List<FindSimilar.QueryResult>();
int[] mapping = new int[100];
int read = 1;
double d;
double dcur;
float count;
while (read > 0) {
read = db.GetNextTracks(ref r, ref audioFeatures, ref mapping, 100, analysisMethod);
for (int i = 0; i < read; i++) {
d = 0;
count = 0;
for (int j = 0; j < seedAudioFeatures.Length; j++) {
dcur = seedAudioFeatures[j].GetDistance(audioFeatures[i], distanceType);
// convert to positive values
dcur = Math.Abs(dcur);
d += dcur;
count++;
}
if (d > 0) {
QueryResult queryResult = new QueryResult();
queryResult.Id = mapping[i];
queryResult.Path = audioFeatures[i].Name;
queryResult.Duration = audioFeatures[i].Duration;
queryResult.Similarity = d/count;
queryResultList.Add(queryResult);
}
}
}
var sortedList = (from row in queryResultList
orderby row.Similarity ascending
select new QueryResult {
Id = row.Id,
Path = row.Path,
Duration = row.Duration,
Similarity = row.Similarity
}).Take(numToTake).ToList();
return sortedList;
}
/// <summary>
/// Find Similar Tracks to one or many audio files using their unique database id(s)
/// </summary>
/// <param name="id">an array of unique database ids for the audio files to search for similar matches</param>
/// <param name="exclude">an array of unique database ids to ignore (normally the same as the id array)</param>
/// <param name="db">database</param>
/// <param name="analysisMethod">analysis method (SCMS or MandelEllis)</param>
/// <param name="numToTake">max number of entries to return</param>
/// <param name="percentage">percentage below and above the duration in ms when querying (used if between 0.1 - 0.9)</param>
/// <param name="distanceType">distance method to use (KullbackLeiblerDivergence is default)</param>
/// <returns>a dictinary list of key value pairs (filepath and distance)</returns>
public static Dictionary<KeyValuePair<int, string>, double> SimilarTracks(int[] id, int[] exclude, Db db, Analyzer.AnalysisMethod analysisMethod, int numToTake=25, double percentage=0.2, AudioFeature.DistanceType distanceType = AudioFeature.DistanceType.KullbackLeiblerDivergence)
{
DbgTimer t = new DbgTimer();
t.Start();
AudioFeature[] seedAudioFeatures = null;
AudioFeature[] audioFeatures = null;
switch (analysisMethod) {
case Analyzer.AnalysisMethod.MandelEllis:
seedAudioFeatures = new MandelEllis[id.Length];
audioFeatures = new MandelEllis[100];
break;
case Analyzer.AnalysisMethod.SCMS:
seedAudioFeatures = new Scms[id.Length];
audioFeatures = new Scms[100];
break;
}
for (int i = 0; i < seedAudioFeatures.Length; i++) {
seedAudioFeatures[i] = db.GetTrack(id[i], analysisMethod);
}
// Get all tracks from the DB except the seedSongs
IDataReader r = db.GetTracks(exclude, seedAudioFeatures[0].Duration, percentage);
// store results in a dictionary
var NameDictionary = new Dictionary<KeyValuePair<int, string>, double>();
int[] mapping = new int[100];
int read = 1;
double d;
double dcur;
float count;
while (read > 0) {
read = db.GetNextTracks(ref r, ref audioFeatures, ref mapping, 100, analysisMethod);
for (int i = 0; i < read; i++) {
d = 0;
count = 0;
for (int j = 0; j < seedAudioFeatures.Length; j++) {
dcur = seedAudioFeatures[j].GetDistance(audioFeatures[i], distanceType);
// convert to positive values
dcur = Math.Abs(dcur);
d += dcur;
count++;
}
if (d > 0) {
NameDictionary.Add(new KeyValuePair<int,string>(mapping[i], audioFeatures[i].Name), d/count);
//NameDictionary.Add(new KeyValuePair<int,string>(mapping[i], String.Format("{0} ({1} ms)", audioFeatures[i].Name, audioFeatures[i].Duration)), d/count);
}
}
}
// sort by non unique values
var sortedDict = (from entry in NameDictionary orderby entry.Value ascending select entry)
.Take(numToTake)
.ToDictionary(pair => pair.Key, pair => pair.Value);
Console.Out.WriteLine(String.Format("Found Similar to ({0}) in {1} ms", String.Join(",", seedAudioFeatures.Select(p=>p.Name)), t.Stop().TotalMilliseconds));
return sortedDict;
}
/// <summary>
/// Add a track N number of times to the database starting with the given track-id
/// </summary>
/// <param name="trackid">track-id to start with</param>
/// <param name="audioFeature">the audiofeature object</param>
/// <returns>the track-ids inserted</returns>
public int[] AddTracks(ref int trackid, AudioFeature audioFeature)
{
IDbDataParameter dbTrackIdParam = new SQLiteParameter("@trackid", DbType.Int64);
IDbDataParameter dbAudioFeatureParam = new SQLiteParameter("@audioFeature", DbType.Binary);
IDbDataParameter dbNameParam = new SQLiteParameter("@name", DbType.String);
IDbDataParameter dbDurationParam = new SQLiteParameter("@duration", DbType.Int64);
IDbDataParameter dbBitStringParam = new SQLiteParameter("@bitstring", DbType.String);
IDbDataParameter dbSignatureParam = new SQLiteParameter("@signature", DbType.Binary);
dbAudioFeatureParam.Value = audioFeature.ToBytes();
dbNameParam.Value = audioFeature.Name;
dbDurationParam.Value = audioFeature.Duration;
dbBitStringParam.Value = audioFeature.BitString;
List<int> trackids = new List<int>();
foreach(bool[] signature in audioFeature.Signatures) {
trackids.Add(trackid);
dbTrackIdParam.Value = trackid;
dbSignatureParam.Value = BoolToByte(signature);
IDbCommand dbcmd;
lock (dbcon) {
dbcmd = dbcon.CreateCommand();
}
dbcmd.CommandText = "INSERT INTO mirage (trackid, audioFeature, name, duration, bitstring, signature) " +
"VALUES (@trackid, @audioFeature, @name, @duration, @bitstring, @signature)";
dbcmd.Parameters.Add(dbTrackIdParam);
dbcmd.Parameters.Add(dbAudioFeatureParam);
dbcmd.Parameters.Add(dbNameParam);
dbcmd.Parameters.Add(dbDurationParam);
dbcmd.Parameters.Add(dbBitStringParam);
dbcmd.Parameters.Add(dbSignatureParam);
try {
dbcmd.ExecuteNonQuery();
} catch (SQLiteException) {
continue;
}
trackid++;
}
return trackids.ToArray();
}
/// <summary> /// Measures the similarity/dissimilarity of two audio streams characterized /// by two audio features. /// </summary> /// <param name="f">AudioFeature another audio feature of the same type</param> /// <returns>double the distance between the two audio streams</returns> public abstract double GetDistance(AudioFeature f, DistanceType t);
/// <summary> /// Measures the similarity/dissimilarity of two audio streams characterized /// by two audio features. /// </summary> /// <param name="f">AudioFeature another audio feature of the same type</param> /// <returns>double the distance between the two audio streams</returns> public abstract double GetDistance(AudioFeature f);
public override double GetDistance(AudioFeature f)
{
throw new NotImplementedException();
}
/// <summary> /// Measures the similarity/dissimilarity of two audio streams characterized /// by two audio features. /// </summary> /// <param name="f">AudioFeature another audio feature of the same type</param> /// <returns>double the distance between the two audio streams</returns> abstract public double GetDistance(AudioFeature f, DistanceType t);
/// <summary> /// Measures the similarity/dissimilarity of two audio streams characterized /// by two audio features. /// </summary> /// <param name="f">AudioFeature another audio feature of the same type</param> /// <returns>double the distance between the two audio streams</returns> abstract public double GetDistance(AudioFeature f);
public override double GetDistance(AudioFeature f, AudioFeature.DistanceType t)
{
if(!(f is Scms))
{
new Exception("Can only handle AudioFeatures of type Scms, not of: "+f);
return -1;
}
Scms other = (Scms)f;
DistanceMeasure distanceMeasure = DistanceMeasure.Euclidean;
switch (t) {
case AudioFeature.DistanceType.Dtw_Euclidean:
distanceMeasure = DistanceMeasure.Euclidean;
break;
case AudioFeature.DistanceType.Dtw_SquaredEuclidean:
distanceMeasure = DistanceMeasure.SquaredEuclidean;
break;
case AudioFeature.DistanceType.Dtw_Manhattan:
distanceMeasure = DistanceMeasure.Manhattan;
break;
case AudioFeature.DistanceType.Dtw_Maximum:
distanceMeasure = DistanceMeasure.Maximum;
break;
case AudioFeature.DistanceType.UCR_Dtw:
return UCRCSharp.UCR.DTW(this.GetArray(), other.GetArray());
case AudioFeature.DistanceType.CosineSimilarity:
return CosineSimilarity(this, other);
case AudioFeature.DistanceType.BitStringHamming:
return Imghash.ImagePHash.HammingDistance(this.BitString, other.BitString);
case AudioFeature.DistanceType.JaqSimilarity:
//return Soundfingerprinting.Hashing.MinHash.CalculateJaqSimilarity(this.Signature, other.Signature);
break;
case AudioFeature.DistanceType.KullbackLeiblerDivergence:
default:
return Distance(this, other, new ScmsConfiguration(Analyzer.MFCC_COEFFICIENTS));
}
Dtw dtw = new Dtw(this.GetArray(), other.GetArray(), distanceMeasure, true, true, null, null, null);
return dtw.GetCost();
}
/// <summary>
/// Add a track to the database using the given track-id
/// </summary>
/// <param name="trackid">track-id to use</param>
/// <param name="audioFeature">the audiofeature object</param>
/// <returns>-1 if failed otherwise the track-id passed</returns>
public int AddTrack(ref int trackid, AudioFeature audioFeature)
{
IDbDataParameter dbTrackIdParam = new SQLiteParameter("@trackid", DbType.Int64);
IDbDataParameter dbAudioFeatureParam = new SQLiteParameter("@audioFeature", DbType.Binary);
IDbDataParameter dbNameParam = new SQLiteParameter("@name", DbType.String);
IDbDataParameter dbDurationParam = new SQLiteParameter("@duration", DbType.Int64);
IDbDataParameter dbBitStringParam = new SQLiteParameter("@bitstring", DbType.String);
dbTrackIdParam.Value = trackid;
dbAudioFeatureParam.Value = audioFeature.ToBytes();
dbNameParam.Value = audioFeature.Name;
dbDurationParam.Value = audioFeature.Duration;
dbBitStringParam.Value = audioFeature.BitString;
IDbCommand dbcmd;
lock (dbcon) {
dbcmd = dbcon.CreateCommand();
}
dbcmd.CommandText = "INSERT INTO mirage (trackid, audioFeature, name, duration, bitstring) " +
"VALUES (@trackid, @audioFeature, @name, @duration, @bitstring)";
dbcmd.Parameters.Add(dbTrackIdParam);
dbcmd.Parameters.Add(dbAudioFeatureParam);
dbcmd.Parameters.Add(dbNameParam);
dbcmd.Parameters.Add(dbDurationParam);
dbcmd.Parameters.Add(dbBitStringParam);
try {
dbcmd.ExecuteNonQuery();
} catch (SQLiteException) {
return -1;
}
//trackid++;
return trackid;
}
/// <summary>
/// Find Similar Tracks to an audio file using its file path
/// </summary>
/// <param name="searchForPath">audio file path</param>
/// <param name="db">database</param>
/// <param name="analysisMethod">analysis method (SCMS or MandelEllis)</param>
/// <param name="numToTake">max number of entries to return</param>
/// <param name="percentage">percentage below and above the duration in ms when querying (used if between 0.1 - 0.9)</param>
/// <param name="distanceType">distance method to use (KullbackLeiblerDivergence is default)</param>
/// <returns>a dictinary list of key value pairs (filepath and distance)</returns>
public static Dictionary<KeyValuePair<int, string>, double> SimilarTracks(string searchForPath, Db db, Analyzer.AnalysisMethod analysisMethod, int numToTake=25, double percentage=0.2, AudioFeature.DistanceType distanceType = AudioFeature.DistanceType.KullbackLeiblerDivergence)
{
DbgTimer t = new DbgTimer();
t.Start();
FileInfo fi = new FileInfo(searchForPath);
AudioFeature seedAudioFeature = null;
AudioFeature[] audioFeatures = null;
switch (analysisMethod) {
case Analyzer.AnalysisMethod.MandelEllis:
seedAudioFeature = Analyzer.AnalyzeMandelEllis(fi);
audioFeatures = new MandelEllis[100];
break;
case Analyzer.AnalysisMethod.SCMS:
seedAudioFeature = Analyzer.AnalyzeScms(fi);
audioFeatures = new Scms[100];
break;
}
// Get all tracks from the DB except the seedSongs
IDataReader r = db.GetTracks(null, seedAudioFeature.Duration, percentage);
// store results in a dictionary
var NameDictionary = new Dictionary<KeyValuePair<int, string>, double>();
int[] mapping = new int[100];
int read = 1;
double dcur;
while (read > 0) {
read = db.GetNextTracks(ref r, ref audioFeatures, ref mapping, 100, analysisMethod);
for (int i = 0; i < read; i++) {
dcur = seedAudioFeature.GetDistance(audioFeatures[i], distanceType);
// convert to positive values
dcur = Math.Abs(dcur);
NameDictionary.Add(new KeyValuePair<int,string>(mapping[i], audioFeatures[i].Name), dcur);
}
}
// sort by non unique values
var sortedDict = (from entry in NameDictionary orderby entry.Value ascending select entry)
.Take(numToTake)
.ToDictionary(pair => pair.Key, pair => pair.Value);
Console.Out.WriteLine(String.Format("Found Similar to ({0}) in {1} ms", seedAudioFeature.Name, t.Stop().TotalMilliseconds));
return sortedDict;
}
/// <summary>
/// Using the passed datareader pointer, fill the audio feature tracks array with content
/// </summary>
/// <param name="tracksIterator">datareader pointer</param>
/// <param name="tracks">AudioFeature array</param>
/// <param name="mapping">array of trackids</param>
/// <param name="len">number of tracks to return</param>
/// <param name="analysisMethod">analysis method (SCMS or MandelEllis)</param>
/// <returns>number of tracks returned</returns>
public int GetNextTracks(ref IDataReader tracksIterator, ref AudioFeature[] tracks,
ref int[] mapping, int len, Analyzer.AnalysisMethod analysisMethod)
{
int i = 0;
while ((i < len) && tracksIterator.Read()) {
AudioFeature audioFeature = null;
switch (analysisMethod) {
case Analyzer.AnalysisMethod.MandelEllis:
audioFeature = MandelEllis.FromBytes((byte[]) tracksIterator.GetValue(0));
break;
case Analyzer.AnalysisMethod.SCMS:
audioFeature = Scms.FromBytes((byte[]) tracksIterator.GetValue(0));
break;
}
mapping[i] = tracksIterator.GetInt32(1);
audioFeature.Name = tracksIterator.GetString(2);
audioFeature.Duration = tracksIterator.GetInt64(3);
audioFeature.BitString = tracksIterator.GetString(4);
audioFeature.Signatures.Add(ByteToBool((byte[]) tracksIterator.GetValue(5)));
tracks[i] = audioFeature;
i++;
}
if (i == 0) {
tracksIterator.Close();
tracksIterator = null;
}
return i;
}
/// <summary>
/// Find Similar Tracks to an audio file using its file path
/// </summary>
/// <param name="searchForPath">audio file path</param>
/// <param name="db">database</param>
/// <param name="analysisMethod">analysis method (SCMS or MandelEllis)</param>
/// <param name="numToTake">max number of entries to return</param>
/// <param name="percentage">percentage below and above the duration in ms when querying (used if between 0.1 - 0.9)</param>
/// <param name="distanceType">distance method to use (KullbackLeiblerDivergence is default)</param>
/// <returns>a list of query results</returns>
public static List<FindSimilar.QueryResult> SimilarTracksList(string searchForPath, Db db, Analyzer.AnalysisMethod analysisMethod, int numToTake=25, double percentage=0.2, AudioFeature.DistanceType distanceType = AudioFeature.DistanceType.KullbackLeiblerDivergence) {
FileInfo fi = new FileInfo(searchForPath);
AudioFeature seedAudioFeature = null;
AudioFeature[] audioFeatures = null;
switch (analysisMethod) {
case Analyzer.AnalysisMethod.MandelEllis:
seedAudioFeature = Analyzer.AnalyzeMandelEllis(fi);
audioFeatures = new MandelEllis[100];
break;
case Analyzer.AnalysisMethod.SCMS:
seedAudioFeature = Analyzer.AnalyzeScms(fi);
audioFeatures = new Scms[100];
break;
}
// Get all tracks from the DB except the seedSongs
IDataReader r = db.GetTracks(null, seedAudioFeature.Duration, percentage);
// store results in a query results list
List<FindSimilar.QueryResult> queryResultList = new List<FindSimilar.QueryResult>();
int[] mapping = new int[100];
int read = 1;
double dcur;
while (read > 0) {
read = db.GetNextTracks(ref r, ref audioFeatures, ref mapping, 100, analysisMethod);
for (int i = 0; i < read; i++) {
dcur = seedAudioFeature.GetDistance(audioFeatures[i], distanceType);
// convert to positive values
dcur = Math.Abs(dcur);
QueryResult queryResult = new QueryResult();
queryResult.Id = mapping[i];
queryResult.Path = audioFeatures[i].Name;
queryResult.Duration = audioFeatures[i].Duration;
queryResult.Similarity = dcur;
queryResultList.Add(queryResult);
}
}
var sortedList = (from row in queryResultList
orderby row.Similarity ascending
select new QueryResult {
Id = row.Id,
Path = row.Path,
Duration = row.Duration,
Similarity = row.Similarity
}).Take(numToTake).ToList();
return sortedList;
}
