public LadspaLibraryContext(string fileName)
{
library = LoadLibrary(fileName);
if (library == IntPtr.Zero)
{
throw new Exception("Failed to load library - file not found or not a valid library.");
}
try
{
IntPtr func = GetProcAddress(library, "ladspa_descriptor");
IntPtr dssiFunc = GetProcAddress(library, "dssi_descriptor");
if (func == IntPtr.Zero && dssiFunc == IntPtr.Zero)
{
throw new Exception("Not a LADSPA plugin: ladspa_descriptor not found.");
}
List <LadspaDescriptor> descriptors = new List <LadspaDescriptor>();
List <DssiDescriptor> dssiDescriptors = new List <DssiDescriptor>();
if (func != IntPtr.Zero)
{
LadspaDescriptorCallback callback = (LadspaDescriptorCallback)Marshal.GetDelegateForFunctionPointer(func, typeof(LadspaDescriptorCallback));
for (uint index = 0; true; index++)
{
IntPtr data = callback(index);
if (data == IntPtr.Zero)
{
break;
}
descriptors.Add(new LadspaDescriptor(this, index, data));
}
}
if (dssiFunc != IntPtr.Zero)
{
LadspaDescriptorCallback callback = (LadspaDescriptorCallback)Marshal.GetDelegateForFunctionPointer(dssiFunc, typeof(LadspaDescriptorCallback));
for (uint index = 0; true; index++)
{
IntPtr data = callback(index);
if (data == IntPtr.Zero)
{
break;
}
dssiDescriptors.Add(new DssiDescriptor(this, index, data));
}
}
LadspaDescriptors = descriptors.ToArray();
DssiDescriptors = dssiDescriptors.ToArray();
}
catch
{
FreeLibrary(library);
throw;
}
}
internal LadspaDescriptor(LadspaLibraryContext library, uint index, IntPtr dataPtr)
{
LadspaDescriptorStruct data = (LadspaDescriptorStruct)Marshal.PtrToStructure(dataPtr, typeof(LadspaDescriptorStruct));
Library = library;
DataHandle = dataPtr;
Index = index;
UniqueID = data.UniqueID;
Properties = data.Properties;
Label = data.Label;
Name = data.Name;
Maker = data.Maker;
Copyright = data.Copyright;
Ports = new LadspaPort[data.PortCount];
int hintsSize = Marshal.SizeOf(typeof(LadspaPortRangeHintsStruct));
int[] types = new int[data.PortCount];
IntPtr[] names = new IntPtr[data.PortCount];
if (data.PortDescriptors != IntPtr.Zero)
{
Marshal.Copy(data.PortDescriptors, types, 0, types.Length);
}
if (data.PortNames != IntPtr.Zero)
{
Marshal.Copy(data.PortNames, names, 0, names.Length);
}
for (int i = 0; i < data.PortCount; i++)
{
string name = names[i] != IntPtr.Zero ? Marshal.PtrToStringAnsi(names[i]) : null;
LadspaPortRangeHintsStruct hints = data.PortRangeHints == IntPtr.Zero ? new LadspaPortRangeHintsStruct() :
(LadspaPortRangeHintsStruct)Marshal.PtrToStructure(IntPtr.Add(data.PortRangeHints, hintsSize * (int)i), typeof(LadspaPortRangeHintsStruct));
Ports[i] = new LadspaPort(this, i, (LadspaPortDescriptorEnum)types[i], hints.Hints, name, hints.LowerBound, hints.UpperBound);
}
if (data.Instantiate != IntPtr.Zero)
{
Instantiate = (LadspaDescriptorInstantiateCallback)Marshal.GetDelegateForFunctionPointer(data.Instantiate, typeof(LadspaDescriptorInstantiateCallback));
}
if (data.ConnectPort != IntPtr.Zero)
{
ConnectPort = (LadspaDescriptorConnectPortCallback)Marshal.GetDelegateForFunctionPointer(data.ConnectPort, typeof(LadspaDescriptorConnectPortCallback));
}
if (data.Activate != IntPtr.Zero)
{
Activate = (LadspaDescriptorCallback)Marshal.GetDelegateForFunctionPointer(data.Activate, typeof(LadspaDescriptorCallback));
}
if (data.Run != IntPtr.Zero)
{
Run = (LadspaDescriptorRunCallback)Marshal.GetDelegateForFunctionPointer(data.Run, typeof(LadspaDescriptorRunCallback));
}
if (data.RunAdding != IntPtr.Zero)
{
RunAdding = (LadspaDescriptorRunCallback)Marshal.GetDelegateForFunctionPointer(data.RunAdding, typeof(LadspaDescriptorRunCallback));
}
if (data.SetRunAddingGain != IntPtr.Zero)
{
SetRunAddingGain = (LadspaDescriptorSetRunGainCallback)Marshal.GetDelegateForFunctionPointer(data.SetRunAddingGain, typeof(LadspaDescriptorSetRunGainCallback));
}
if (data.Deactivate != IntPtr.Zero)
{
Deactivate = (LadspaDescriptorCallback)Marshal.GetDelegateForFunctionPointer(data.Deactivate, typeof(LadspaDescriptorCallback));
}
if (data.Cleanup != IntPtr.Zero)
{
Cleanup = (LadspaDescriptorCallback)Marshal.GetDelegateForFunctionPointer(data.Cleanup, typeof(LadspaDescriptorCallback));
}
}