internal static PresetRegion[] Create(Preset preset, Span <Zone> zones, Instrument[] instruments)
{
Zone global = null;
// Is the first one the global zone?
if (zones[0].Generators.Length == 0 || zones[0].Generators.Last().Type != GeneratorType.Instrument)
{
// The first one is the global zone.
global = zones[0];
}
if (global != null)
{
// The global zone is regarded as the base setting of subsequent zones.
var regions = new PresetRegion[zones.Length - 1];
for (var i = 0; i < regions.Length; i++)
{
regions[i] = new PresetRegion(preset, global.Generators, zones[i + 1].Generators, instruments);
}
return(regions);
}
else
{
// No global zone.
var regions = new PresetRegion[zones.Length];
for (var i = 0; i < regions.Length; i++)
{
regions[i] = new PresetRegion(preset, null, zones[i].Generators, instruments);
}
return(regions);
}
}
private Preset(PresetInfo info, Zone[] zones, Instrument[] instruments)
{
this.name = info.Name;
this.patchNumber = info.PatchNumber;
this.bankNumber = info.BankNumber;
this.library = info.Library;
this.genre = info.Genre;
this.morphology = info.Morphology;
var zoneCount = info.ZoneEndIndex - info.ZoneStartIndex + 1;
if (zoneCount <= 0)
{
throw new InvalidDataException($"The preset '{info.Name}' has no zone.");
}
var zoneSpan = zones.AsSpan(info.ZoneStartIndex, zoneCount);
regions = PresetRegion.Create(this, zoneSpan, instruments);
}
internal RegionPair(PresetRegion preset, InstrumentRegion instrument)
{
this.preset = preset;
this.instrument = instrument;
}