private void button2_Click(object sender, EventArgs e)
{
if (RecordStream != null)
{
RecordStream.StopRecording();
Stopwatch.Stop();
if (RecordMemoryStream.Length > 0)
{
RecordMemoryStream.Seek(0, SeekOrigin.Begin);
var stream = new RawSourceWaveStream(RecordMemoryStream, RecordStream.WaveFormat);
// find the song
textBox1.Text = $"Fingerprinting {RecordMemoryStream.Length} bytes, format: {RecordStream.WaveFormat.ToString()}... \r\n";
Application.DoEvents();
//var returnList = GetFingerprint(RecordMemoryStream, RecordStream.WaveFormat.BitsPerSample);
List <long> returnList;
using (var tempStream = new MemoryStream())
{
var buffer = new byte[65536];
var shortBuffer = new short[32768];
var length = 0;
while ((length = stream.Read(buffer, 0, buffer.Length)) > 0)
{
Buffer.BlockCopy(buffer, 0, shortBuffer, 0, length);
for (int i = 0; i < length / 2; i += 2)
{
double outSample = shortBuffer[i] * 0.5 + shortBuffer[i + 1] * 0.5;
outSample = Math.Max(outSample, float.MinValue);
outSample = Math.Min(outSample, float.MaxValue);
tempStream.Write(BitConverter.GetBytes((float)outSample), 0, sizeof(float));
//writer.Write((float)outSample);
//System.Diagnostics.Debug.WriteLine(outSample);
}
}
returnList = GetFingerprint(tempStream);
}
textBox1.Text += "Searching... \r\n";
Application.DoEvents();
var foundList = new List <KeyValuePair <SongData, int> >();
var noMatches = new List <KeyValuePair <SongData, int> >();
var tempList = new List <SongTimeData>();
foundList.Clear();
tempList.Clear();
int fingerprintPos = 0;
foreach (var fingerprint in returnList)
{
IEnumerable <SongTimeData> matchList;
if (songDb.TryGetValue(fingerprint, out matchList))
{
tempList.AddRange(matchList.Select(x =>
{
x.Position -= fingerprintPos;
return(x);
}));
}
fingerprintPos++;
}
textBox1.Text += $"Found {tempList.Count} matches...\r\n";
Application.DoEvents();
foreach (var item in tempList)
{
if (!foundList.Where(x => x.Key.FileName == item.SongData.FileName).Any())
{
var foundItem = tempList.Where(x => (x.SongData.FileName == item.SongData.FileName)).ToArray();
if (foundItem != null && foundItem.Any())
{
var minIndex = foundItem.Min(x => x.Position);
int score = 0;
int matches = foundItem.Length;
for (int i = 0; i < foundItem.Length; i++)
{
score += Math.Abs(foundItem[i].Position - minIndex);
}
foundList.Add(new KeyValuePair <SongData, int>(item.SongData, score / matches));
noMatches.Add(new KeyValuePair <SongData, int>(item.SongData, matches));
}
}
}
SongData bestMatch = null;
int minScore = int.MaxValue;
int maxMatches = 0;
int count = 0;
foreach (var item in noMatches.OrderByDescending(x => x.Value))
{
var score = foundList.Where(x => (item.Key.FileName == x.Key.FileName)).FirstOrDefault();
if ((item.Value >= 2))
{
if (count < 20)
{
textBox1.Text += $"{count}: Match {item.Key.TrackName} {item.Value} times - Score: {score.Value}\r\n";
}
count++;
if (item.Value > maxMatches || ((item.Value == maxMatches) && score.Value < minScore))
{
bestMatch = item.Key;
minScore = score.Value;
maxMatches = item.Value;
}
}
}
if (bestMatch != null)
{
textBox1.Text += $"\r\nBest match: {bestMatch.TrackName}";
}
}
}
}