alphaTab.midi.MidiTickLookup
Description
This class holds all information about when MasterBars and Beats are played.
On top level it is organized into MasterBarTickLookup objects indicating the
master bar start and end times. This information is used to highlight the currently played bars
and it gives access to the played beats in this masterbar and their times.
The BeatTickLookup are then the slices into which the masterbar is separated by the voices and beats
of all tracks. An example how things are organized:
Time (eighths): | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
Track 1: | B1 | B2 | B3 | B4 | B5 | B6 | Track 2: | B7 | B7 | B9 | B10| B11| B12| Track 3: | B13 |
Lookup: | L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 | Active Beats:
- L1 B1,B7,B13
- L2 B2,B7,B13
- L3 B3,B7,B13
- L4 B4,B7,B13
- L5 B5,B9,B13
- L6 B5,B10,B13
- L7 B6,B11,B13
- L8 B6,B12,B13
Then during playback we build out of this list MidiTickLookupFindBeatResult objects which are sepcific
to the visible tracks displayed. This is required because if only Track 2 is displayed we cannot use the the
Lookup L1 alone to determine the start and end of the beat cursor. In this case we will derive a
MidiTickLookupFindBeatResult which holds for Time 01 the lookup L1 as start and L3 as end. This will be used
both for the cursor and beat highlighting.
class MidiTickLookupProperties
multiBarRestInfo | The information about which bars are displayed via multi-bar rests. |
Methods
addBeat(Beat, number, number) | |
addMasterBar(MasterBarTickLookup) | Adds a new |
findBeat(Set<number>, number, MidiTickLookupFindBeatResult | null) | Finds the currently played beat given a list of tracks and the current time. |
getBeatStart(Beat) | Gets the start time in midi ticks for a given beat at which the masterbar is played the first time. |
getMasterBar(MasterBar) | Gets the |
getMasterBarStart(MasterBar) | Gets the start time in midi ticks for a given masterbar at which the masterbar is played the first time. |