internal static PresetInfo[] ReadFromChunk(BinaryReader reader, int size)
{
if (size % 38 != 0)
{
throw new InvalidDataException("The preset list is invalid.");
}
var count = size / 38;
var presets = new PresetInfo[count];
for (var i = 0; i < count; i++)
{
var preset = new PresetInfo();
preset.name = reader.ReadFixedLengthString(20);
preset.patchNumber = reader.ReadUInt16();
preset.bankNumber = reader.ReadUInt16();
preset.zoneStartIndex = reader.ReadUInt16();
preset.library = reader.ReadInt32();
preset.genre = reader.ReadInt32();
preset.morphology = reader.ReadInt32();
presets[i] = preset;
}
for (var i = 0; i < count - 1; i++)
{
presets[i].zoneEndIndex = presets[i + 1].zoneStartIndex - 1;
}
return(presets);
}
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($"The preset '{info.Name}' has no zone.");
}
var zoneSpan = zones.AsSpan(info.ZoneStartIndex, zoneCount);
regions = PresetRegion.Create(this, zoneSpan, instruments);
}
internal SoundFontParameters(BinaryReader reader)
{
var chunkId = reader.ReadFourCC();
if (chunkId != "LIST")
{
throw new InvalidDataException("The LIST chunk was not found.");
}
var end = reader.BaseStream.Position + reader.ReadInt32();
var listType = reader.ReadFourCC();
if (listType != "pdta")
{
throw new InvalidDataException($"The type of the LIST chunk must be 'pdta', but was '{listType}'.");
}
PresetInfo[] presetInfos = null;
ZoneInfo[] presetBag = null;
Generator[] presetGenerators = null;
InstrumentInfo[] instrumentInfos = null;
ZoneInfo[] instrumentBag = null;
Generator[] instrumentGenerators = null;
while (reader.BaseStream.Position < end)
{
var id = reader.ReadFourCC();
var size = reader.ReadInt32();
switch (id)
{
case "phdr":
presetInfos = PresetInfo.ReadFromChunk(reader, size);
break;
case "pbag":
presetBag = ZoneInfo.ReadFromChunk(reader, size);
break;
case "pmod":
Modulator.DiscardData(reader, size);
break;
case "pgen":
presetGenerators = Generator.ReadFromChunk(reader, size);
break;
case "inst":
instrumentInfos = InstrumentInfo.ReadFromChunk(reader, size);
break;
case "ibag":
instrumentBag = ZoneInfo.ReadFromChunk(reader, size);
break;
case "imod":
Modulator.DiscardData(reader, size);
break;
case "igen":
instrumentGenerators = Generator.ReadFromChunk(reader, size);
break;
case "shdr":
sampleHeaders = SampleHeader.ReadFromChunk(reader, size);
break;
default:
throw new InvalidDataException($"The INFO list contains an unknown ID '{id}'.");
}
}
if (presetInfos == null)
{
throw new InvalidDataException("The PHDR sub-chunk was not found.");
}
if (presetBag == null)
{
throw new InvalidDataException("The PBAG sub-chunk was not found.");
}
if (presetGenerators == null)
{
throw new InvalidDataException("The PGEN sub-chunk was not found.");
}
if (instrumentInfos == null)
{
throw new InvalidDataException("The INST sub-chunk was not found.");
}
if (instrumentBag == null)
{
throw new InvalidDataException("The IBAG sub-chunk was not found.");
}
if (instrumentGenerators == null)
{
throw new InvalidDataException("The IGEN sub-chunk was not found.");
}
if (sampleHeaders == null)
{
throw new InvalidDataException("The SHDR sub-chunk was not found.");
}
var instrumentZones = Zone.Create(instrumentBag, instrumentGenerators);
instruments = Instrument.Create(instrumentInfos, instrumentZones, sampleHeaders);
var presetZones = Zone.Create(presetBag, presetGenerators);
presets = Preset.Create(presetInfos, presetZones, instruments);
}