/// <summary> /// Finds the currently played beat given a list of tracks and the current time. /// </summary> /// <param name="tracks">The tracks in which to search the played beat for.</param> /// <param name="tick">The current time in midi ticks.</param> /// <returns>The information about the current beat or null if no beat could be found.</returns> public MidiTickLookupFindBeatResult FindBeat(Track[] tracks, int tick) { // get all beats within the masterbar var masterBar = FindMasterBar(tick); if (masterBar == null) { return(null); } var trackLookup = new FastDictionary <int, bool>(); foreach (var track in tracks) { trackLookup[track.Index] = true; } BeatTickLookup beat = null; int index = 0; var beats = masterBar.Beats; for (int b = 0; b < beats.Count; b++) { // is the current beat played on the given tick? var currentBeat = beats[b]; // skip non relevant beats if (!trackLookup.ContainsKey(currentBeat.Beat.Voice.Bar.Staff.Track.Index)) { continue; } if (currentBeat.Start <= tick && tick < currentBeat.End) { // take the latest played beat we can find. (most right) if (beat == null || (beat.Start < currentBeat.Start)) { beat = beats[b]; index = b; } } // if we are already past the tick, we can stop searching else if (currentBeat.End > tick) { break; } } if (beat == null) { return(null); } // search for next relevant beat in masterbar BeatTickLookup nextBeat = null; for (int b = index + 1; b < beats.Count; b++) { var currentBeat = beats[b]; if (currentBeat.Start > beat.Start && trackLookup.ContainsKey(currentBeat.Beat.Voice.Bar.Staff.Track.Index)) { nextBeat = currentBeat; break; } } // first relevant beat in next bar if (nextBeat == null && masterBar.NextMasterBar != null) { var nextBar = masterBar.NextMasterBar; beats = nextBar.Beats; for (int b = 0; b < beats.Count; b++) { var currentBeat = beats[b]; if (trackLookup.ContainsKey(currentBeat.Beat.Voice.Bar.Staff.Track.Index)) { nextBeat = currentBeat; break; } } } var result = new MidiTickLookupFindBeatResult(); result.CurrentBeat = beat.Beat; result.NextBeat = nextBeat == null ? null : nextBeat.Beat; result.Duration = MidiUtils.TicksToMillis(beat.End - beat.Start, masterBar.Tempo); return(result); }
/// <summary> /// Adds the given <see cref="BeatTickLookup"/> to the current <see cref="MasterBarTickLookup"/>. /// </summary> /// <param name="beat">The lookup to add.</param> public void AddBeat(BeatTickLookup beat) { _currentMasterBar.AddBeat(beat); }
/// <summary> /// Adds a new <see cref="BeatTickLookup"/> to the list of played beats during this MasterBar period. /// </summary> /// <param name="beat"></param> public void AddBeat(BeatTickLookup beat) { Beats.Add(beat); }