public void Add(SubFingerprintsGeneratedEventArgs e)
{
if (e.SubFingerprints.Count == 0)
{
return;
}
lock (this) {
if (!store.ContainsKey(e.AudioTrack))
{
store.Add(e.AudioTrack, new List <SubFingerprintHash>());
}
foreach (var sfp in e.SubFingerprints)
{
if (!sfp.IsVariation)
{
// store the sub-fingerprint in the sequential list of the audio track
store[e.AudioTrack].Add(sfp.Hash);
}
// insert a track/index lookup entry for the sub-fingerprint
collisionMap.Add(sfp.Hash, new SubFingerprintLookupEntry(e.AudioTrack, sfp.Index));
}
}
}
public void Add(SubFingerprintsGeneratedEventArgs e, bool suppressSilentCollisions = false)
{
if (e.SubFingerprints.Count == 0)
{
return;
}
lock (this) {
if (!store.ContainsKey(e.AudioTrack))
{
store.Add(e.AudioTrack, new List <SubFingerprintHash>());
}
foreach (var sfp in e.SubFingerprints)
{
if (!sfp.IsVariation)
{
// store the sub-fingerprint in the sequential list of the audio track
store[e.AudioTrack].Add(sfp.Hash);
}
if (suppressSilentCollisions && sfp.Hash.Value == 0)
{
// Skip a silent hash, i.e. a hash without any changes, as it happens with silent signals as input
continue;
}
// insert a track/index lookup entry for the sub-fingerprint
collisionMap.Add(sfp.Hash, new SubFingerprintLookupEntry(e.AudioTrack, sfp.Index));
}
}
}
public void Add(SubFingerprintsGeneratedEventArgs e)
{
if (e.SubFingerprints.Count == 0)
{
return;
}
lock (this) {
// Make sure there's a store for the track and get it
if (!store.ContainsKey(e.AudioTrack))
{
store.Add(e.AudioTrack, new TrackStore());
}
var trackStore = store[e.AudioTrack];
int hashListIndex = 0;
SubFingerprint hash;
// Iterate through the sequence of input hashes and add them to the store (in batches of the same frame index)
while (e.SubFingerprints.Count > hashListIndex)
{
int storeHashIndex = trackStore.hashes.Count;
int storeIndex = e.SubFingerprints[hashListIndex].Index;
int hashCount = 0;
// Count all sequential input hashes with the same frame index (i.e. batch) and add them to the store
while (e.SubFingerprints.Count > hashListIndex + hashCount &&
(hash = e.SubFingerprints[hashListIndex + hashCount]).Index == storeIndex)
{
// Insert hash into the sequential store
trackStore.hashes.Add(hash.Hash);
// Insert a track/index lookup entry for the fingerprint hash
collisionMap.Add(hash.Hash, new SubFingerprintLookupEntry(e.AudioTrack, hash.Index));
hashCount++;
}
// Add an index entry which tells where a hash with a specific frame index can be found in the store
if (hashCount > 0)
{
TrackStore.IndexEntry ie;
// If there is already an entry for the frame index, take it and update its length, ...
if (trackStore.index.ContainsKey(storeIndex))
{
ie = trackStore.index[storeIndex];
ie.length += hashCount;
trackStore.index.Remove(storeIndex);
}
else // ... else create a new entry
{
ie = new TrackStore.IndexEntry(storeHashIndex, hashCount);
}
// Add the current length of the hash list as start pointer for all hashes belonging to the current index
trackStore.index.Add(storeIndex, ie);
}
hashListIndex += hashCount;
}
}
}