/// <summary>
///
/// </summary>
/// <param name="databaseHashes">Dictionary: Key=Hash of anchorFreq, targetFreq, offsetTime; Value=List of hash fingerprints</param>
/// <returns></returns>
public int IdentifyEpisodeForAudioMatch(Dictionary <int, List <Fingerprint> > databaseHashes)
{
var episodeFingerprintMatches = new Dictionary <int, Dictionary <long, int> >(); //Key is fingerprint hash. Value is dictionary where each entry's key is the timestamp delta between two samples and value is count of samples with the same timestamp delta
//Generate fingerprints for audio capture //TODO: Use window into episode
string path = Directory.GetCurrentDirectory() + "\\SampleVideo2Capture2.mp4";
//string path = Directory.GetCurrentDirectory() + "\\Sample1KHz.mp4";
var fingerprinter = new AudioFileFingerprinter();
var fingerprintsForCaptureFile = new Dictionary <int, List <Fingerprint> >(1000);
fingerprinter.GenerateFingerprintsForFile(path, 0, fingerprintsForCaptureFile);
SaveToJson(Directory.GetCurrentDirectory() + "\\MatchFingerprints.json", fingerprintsForCaptureFile);
//Count number of matching hashes at the same sample time delta for each possibly matching episode.
// . ForEach group of fingerprints for capture file with the same hash
// . . For each fingerprint for this file in the group
// . . . If fingerprint's hash is in another file in the database
// . . . . Create histogram of deltas between capture sample's sample time and the sample time for samples with matching fingerprints in the database
foreach (var hashGroup in fingerprintsForCaptureFile)
{
var fingerprintHash = hashGroup.Key;
var fingerprintsWithSameHash = hashGroup.Value;
foreach (var captureFingerprint in fingerprintsWithSameHash)
{
if (databaseHashes.ContainsKey(captureFingerprint.Hash))
{
ProcessMatchingHash(captureFingerprint, databaseHashes[captureFingerprint.Hash], episodeFingerprintMatches);
}
}
}
return(GetEpisodeIdForMatchingEpisode(episodeFingerprintMatches));
}
public Dictionary <int, List <Fingerprint> > GenerateFingerprintsForAllShows()
{
if (LOAD_FROM_JSON)
{
databaseFingerprintHashes = LoadFromJson(JSON_FILE_PATH);
}
else
{
databaseFingerprintHashes = new Dictionary <int, List <Fingerprint> >(20000);
AudioFileFingerprinter fingerprinter;
//fingerprinter = new AudioFileFingerprinter();
//fingerprinter.GenerateFingerprintsForFile(Directory.GetCurrentDirectory() + "\\SampleVideo.mp4", 1, databaseFingerprintHashes);
fingerprinter = new AudioFileFingerprinter();
fingerprinter.GenerateFingerprintsForFile(Directory.GetCurrentDirectory() + "\\SampleVideo2.mp4", 2, databaseFingerprintHashes);
//fingerprinter = new AudioFileFingerprinter();
//fingerprinter.GenerateFingerprintsForFile(Directory.GetCurrentDirectory() + "\\SampleVideo2Capture1.mp4", 1, databaseFingerprintHashes);
//fingerprinter = new AudioFileFingerprinter();
//fingerprinter.GenerateFingerprintsForFile(Directory.GetCurrentDirectory() + "\\SampleVideo2Capture2.mp4", 1, databaseFingerprintHashes);
//TODO
var maxFileToProcess = -1; //TODO REMOVE
var fileList = Directory.GetFiles(Directory.GetCurrentDirectory() + "\\TestFiles", "*.mp4");
var episodeId = 3;
foreach (var filePath in fileList)
{
if (maxFileToProcess-- <= 0) //TODO REMOVE
{
break;
}
fingerprinter = new AudioFileFingerprinter();
fingerprinter.GenerateFingerprintsForFile(filePath, episodeId++, databaseFingerprintHashes);
}
SaveToJson(JSON_FILE_PATH);
}
return(databaseFingerprintHashes);
}