public SoundFont(Stream sfFile)
{
try
{
RiffChunk topLevelChunk = RiffChunk.GetTopLevelChunk(new BinaryReader(sfFile));
if (!(topLevelChunk.ChunkID == "RIFF"))
{
throw new InvalidDataException("Not a RIFF file");
}
string text = topLevelChunk.ReadChunkID();
if (text != "sfbk")
{
throw new InvalidDataException(string.Format("Not a SoundFont ({0})", text));
}
RiffChunk nextSubChunk = topLevelChunk.GetNextSubChunk();
if (!(nextSubChunk.ChunkID == "LIST"))
{
throw new InvalidDataException(string.Format("Not info list found ({0})", nextSubChunk.ChunkID));
}
this.info = new InfoChunk(nextSubChunk);
RiffChunk nextSubChunk2 = topLevelChunk.GetNextSubChunk();
this.sampleData = new SampleDataChunk(nextSubChunk2);
nextSubChunk2 = topLevelChunk.GetNextSubChunk();
this.presetsChunk = new PresetsChunk(nextSubChunk2);
}
finally
{
if (sfFile != null)
{
((IDisposable)sfFile).Dispose();
}
}
}
internal InfoChunk(RiffChunk chunk)
{
bool ifilPresent = false;
bool inamPresent = false;
if (chunk.ReadChunkID() != "INFO")
{
throw new InvalidDataException("Not an INFO chunk");
}
//this.chunk = chunk;
RiffChunk c;
while ((c = chunk.GetNextSubChunk()) != null)
{
switch (c.ChunkID)
{
case "ifil":
ifilPresent = true;
SoundFontVersion = c.GetDataAsStructure(new SFVersionBuilder());
break;
case "isng":
WaveTableSoundEngine = c.GetDataAsString();
break;
case "INAM":
inamPresent = true;
BankName = c.GetDataAsString();
break;
case "irom":
DataROM = c.GetDataAsString();
break;
case "iver":
ROMVersion = c.GetDataAsStructure(new SFVersionBuilder());
break;
case "ICRD":
CreationDate = c.GetDataAsString();
break;
case "IENG":
Author = c.GetDataAsString();
break;
case "IPRD":
TargetProduct = c.GetDataAsString();
break;
case "ICOP":
Copyright = c.GetDataAsString();
break;
case "ICMT":
Comments = c.GetDataAsString();
break;
case "ISFT":
Tools = c.GetDataAsString();
break;
default:
throw new InvalidDataException($"Unknown chunk type {c.ChunkID}");
}
}
if (!ifilPresent)
{
throw new InvalidDataException("Missing SoundFont version information");
}
// n.b. issue #150 - it is valid for isng not to be present
if (!inamPresent)
{
throw new InvalidDataException("Missing SoundFont name information");
}
}
internal PresetsChunk(RiffChunk chunk)
{
string header = chunk.ReadChunkID();
if (header != "pdta")
{
throw new InvalidDataException(String.Format("Not a presets data chunk ({0})", header));
}
RiffChunk c;
while ((c = chunk.GetNextSubChunk()) != null)
{
switch (c.ChunkID)
{
case "PHDR":
case "phdr":
c.GetDataAsStructureArray(presetHeaders);
break;
case "PBAG":
case "pbag":
c.GetDataAsStructureArray(presetZones);
break;
case "PMOD":
case "pmod":
c.GetDataAsStructureArray(presetZoneModulators);
break;
case "PGEN":
case "pgen":
c.GetDataAsStructureArray(presetZoneGenerators);
break;
case "INST":
case "inst":
c.GetDataAsStructureArray(instruments);
break;
case "IBAG":
case "ibag":
c.GetDataAsStructureArray(instrumentZones);
break;
case "IMOD":
case "imod":
c.GetDataAsStructureArray(instrumentZoneModulators);
break;
case "IGEN":
case "igen":
c.GetDataAsStructureArray(instrumentZoneGenerators);
break;
case "SHDR":
case "shdr":
c.GetDataAsStructureArray(sampleHeaders);
break;
default:
throw new InvalidDataException(String.Format("Unknown chunk type {0}", c.ChunkID));
}
}
// now link things up
instrumentZoneGenerators.Load(sampleHeaders.SampleHeaders);
instrumentZones.Load(instrumentZoneModulators.Modulators, instrumentZoneGenerators.Generators);
instruments.LoadZones(instrumentZones.Zones);
presetZoneGenerators.Load(instruments.Instruments);
presetZones.Load(presetZoneModulators.Modulators, presetZoneGenerators.Generators);
presetHeaders.LoadZones(presetZones.Zones);
sampleHeaders.RemoveEOS();
}
