bool VSTPresets::SaveFile(std::ostream &f, CVstPlugin &plugin, bool bank)
//-----------------------------------------------------------------------
{
if(!bank)
{
SaveProgram(f, plugin);
} else
{
bool writeChunk = plugin.ProgramsAreChunks();
ChunkHeader header;
header.chunkMagic = cMagic;
header.version = 2;
header.fxID = plugin.GetUID();
header.fxVersion = plugin.GetVersion();
// Write unfinished header... We need to update the size once we're done writing.
Write(header, f);
uint32 numProgs = std::max(plugin.GetNumPrograms(), VstInt32(1)), curProg = plugin.GetCurrentProgram();
WriteBE(numProgs, f);
WriteBE(curProg, f);
char reserved[124];
MemsetZero(reserved);
Write(reserved, f);
if(writeChunk)
{
char *chunk = nullptr;
uint32 chunkSize = mpt::saturate_cast<uint32>(plugin.Dispatch(effGetChunk, 0, 0, &chunk, 0));
if(chunkSize && chunk)
{
WriteBE(chunkSize, f);
f.write(chunk, chunkSize);
} else
{
// The plugin returned no chunk! Gracefully go back and save parameters instead...
writeChunk = false;
}
}
if(!writeChunk)
{
for(uint32 p = 0; p < numProgs; p++)
{
plugin.SetCurrentProgram(p);
SaveProgram(f, plugin);
}
plugin.SetCurrentProgram(curProg);
}
// Now we know the correct chunk size.
std::streamoff end = f.tellp();
header.byteSize = static_cast<VstInt32>(end - 8);
header.fxMagic = writeChunk ? chunkBankMagic : bankMagic;
header.ConvertEndianness();
f.seekp(0);
Write(header, f);
}
return true;
}
VSTPresets::ErrorCode VSTPresets::LoadFile(FileReader &file, CVstPlugin &plugin)
//------------------------------------------------------------------------------
{
const bool firstChunk = file.GetPosition() == 0;
ChunkHeader header;
if(!file.ReadConvertEndianness(header) || header.chunkMagic != cMagic)
{
return invalidFile;
}
if(header.fxID != plugin.GetUID())
{
return wrongPlugin;
}
if(header.fxMagic == fMagic || header.fxMagic == chunkPresetMagic)
{
// Program
PlugParamIndex numParams = file.ReadUint32BE();
VstPatchChunkInfo info;
info.version = 1;
info.pluginUniqueID = header.fxID;
info.pluginVersion = header.fxVersion;
info.numElements = numParams;
MemsetZero(info.future);
plugin.Dispatch(effBeginLoadProgram, 0, 0, &info, 0.0f);
plugin.Dispatch(effBeginSetProgram, 0, 0, nullptr, 0.0f);
char prgName[28];
file.ReadString<mpt::String::maybeNullTerminated>(prgName, 28);
plugin.Dispatch(effSetProgramName, 0, 0, prgName, 0.0f);
if(header.fxMagic == fMagic)
{
if(plugin.GetNumParameters() != numParams)
{
return wrongParameters;
}
for(PlugParamIndex p = 0; p < numParams; p++)
{
plugin.SetParameter(p, file.ReadFloatBE());
}
} else
{
FileReader chunk = file.ReadChunk(file.ReadUint32BE());
plugin.Dispatch(effSetChunk, 1, chunk.GetLength(), const_cast<char *>(chunk.GetRawData()), 0);
}
plugin.Dispatch(effEndSetProgram, 0, 0, nullptr, 0.0f);
} else if((header.fxMagic == bankMagic || header.fxMagic == chunkBankMagic) && firstChunk)
{
// Bank - only read if it's the first chunk in the file, not if it's a sub chunk.
uint32 numProgs = file.ReadUint32BE();
uint32 currentProgram = file.ReadUint32BE();
file.Skip(124);
VstPatchChunkInfo info;
info.version = 1;
info.pluginUniqueID = header.fxID;
info.pluginVersion = header.fxVersion;
info.numElements = numProgs;
MemsetZero(info.future);
plugin.Dispatch(effBeginLoadBank, 0, 0, &info, 0.0f);
if(header.fxMagic == bankMagic)
{
VstInt32 oldCurrentProgram = plugin.GetCurrentProgram();
for(uint32 p = 0; p < numProgs; p++)
{
plugin.Dispatch(effBeginSetProgram, 0, 0, nullptr, 0.0f);
plugin.Dispatch(effSetProgram, 0, 0, nullptr, 0.0f);
ErrorCode retVal = LoadFile(file, plugin);
if(retVal != noError)
{
return retVal;
}
plugin.Dispatch(effEndSetProgram, 0, 0, nullptr, 0.0f);
}
plugin.SetCurrentProgram(oldCurrentProgram);
} else
{
FileReader chunk = file.ReadChunk(file.ReadUint32BE());
plugin.Dispatch(effSetChunk, 0, chunk.GetLength(), const_cast<char *>(chunk.GetRawData()), 0);
}
if(header.version >= 2)
{
plugin.SetCurrentProgram(currentProgram);
}
}
return noError;
}