/// <summary>
///Creates a Generic Stream object with user supplied callbacks. This is the most complex way of using
///a GenericStream and will require the user to implement more of the functionality normally handled by
///the standard callbacks. In particular Marker Support will require the user to make their transfer
///method "rewindable" for up to 100MB of previously transferred data. See API Guide: FPStream_CreateGenericStream
///See API Guide: FPStream_CreateGenericStream
///
///@param direction Indicator for the type of GenericStream that is to be created i.e. input to
/// Centera or output from Centera.
///@param userCBS Callbacks provided by the user. Typically the derived class will only
/// require to override PopulateBuffer and / or ProcessReturnedData.
///@param userData An IntPtr which can be used to reference a user object that may be required
/// when working with the input or output data buffer.
/// </summary>
public FPGenericStream(StreamDirection direction, FPStreamCallbacks userCBS, IntPtr userData)
{
prepare = new FPCallback(userCBS.PrepareBuffer);
complete = new FPCallback(userCBS.BlockTransferred);
mark = new FPCallback(userCBS.SetMark);
reset = new FPCallback(userCBS.ResetMark);
close = new FPCallback(userCBS.TransferComplete);
if (direction == StreamDirection.InputToCentera)
{
theStream = SDK.FPStream_CreateGenericStream(prepare, complete, mark, reset, close, userData);
}
else
{
theStream = SDK.FPStream_CreateGenericStream(null, complete, mark, reset, close, userData);
}
AddObject(theStream, this);
userCBS.StreamRef = theStream;
userStream = userCBS.userStream;
unsafe
{
theInfo = SDK.FPStream_GetInfo(theStream);
theInfo->mAtEOF = 0;
theInfo->mStreamLen = -1;
theInfo->mTransferLen = 0;
theInfo->mStreamPos = 0;
theInfo->mMarkerPos = 0;
theInfo->mBuffer = null;
theInfo->mReadFlag = (byte)direction;
}
}
public static extern FPStreamRef FPStream_CreateGenericStream(FPCallback prepareProc,
FPCallback completeProc,
FPCallback setMarkerProc,
FPCallback resetMarkerProc,
FPCallback closeProc,
IntPtr userData);
