TransferMechs GetTransferMechs()
{
TransferMechs retVal = default;
bool xferImage = true; // default to always xfer image
bool xferAudio = false;
DataGroups xferGroup = DataGroups.None;
XferMech imgXferMech = XferMech.Native;
XferMech audXferMech = XferMech.Native;
if (DGControl.XferGroup.Get(ref xferGroup) == ReturnCode.Success)
{
xferAudio = (xferGroup & DataGroups.Audio) == DataGroups.Audio;
// some DS returns none but we will assume it's image
xferImage = xferGroup == DataGroups.None || (xferGroup & DataGroups.Image) == DataGroups.Image;
}
// TODO: restore this
if (xferImage)
{
//imgXferMech = CurrentSource.Capabilities.ICapXferMech.GetCurrent();
retVal.ImageMech = imgXferMech;
}
if (xferAudio)
{
//audXferMech = CurrentSource.Capabilities.ACapXferMech.GetCurrent();
retVal.AudioMech = audXferMech;
}
return(retVal);
}
/// <summary>
/// Performs the TWAIN transfer routine at state 6.
/// </summary>
public static void DoTransferRoutine(ITwainSessionInternal session)
{
#region get xfer types
bool xferImage = true; // default to always xfer image
bool xferAudio = false;
DataGroups xferGroup = DataGroups.None;
XferMech imgXferMech = XferMech.Native;
XferMech audXferMech = XferMech.Native;
if (session.DGControl.XferGroup.Get(ref xferGroup) == ReturnCode.Success)
{
xferAudio = (xferGroup & DataGroups.Audio) == DataGroups.Audio;
// check for Plustek OpticSlim 2680H, this scanner returns wrong xferGroup after first scanning
if (session.CurrentSource.Identity.ProductName.IndexOf("Plustek", StringComparison.OrdinalIgnoreCase) > -1 &&
session.CurrentSource.Identity.ProductName.IndexOf("OpticSlim", StringComparison.OrdinalIgnoreCase) > -1 &&
session.CurrentSource.Identity.ProductName.IndexOf("2680H", StringComparison.OrdinalIgnoreCase) > -1)
{
xferImage = true;
}
else
{
xferImage = xferGroup == DataGroups.None || (xferGroup & DataGroups.Image) == DataGroups.Image;
}
}
// some DS end up getting none but we will assume it's image
if (xferImage)
{
imgXferMech = session.CurrentSource.Capabilities.ICapXferMech.GetCurrent();
}
if (xferAudio)
{
var mech = session.CurrentSource.Capabilities.ACapXferMech.GetCurrent();
}
#endregion
var pending = new TWPendingXfers();
var rc = session.DGControl.PendingXfers.Get(pending);
if (rc == ReturnCode.Success)
{
do
{
#region raise xfer ready
var preXferArgs = new TransferReadyEventArgs(session.CurrentSource, pending.Count, pending.EndOfJob);;
session.SafeSyncableRaiseEvent(preXferArgs);
#endregion
#region actually handle xfer
if (preXferArgs.CancelAll || session.CloseDSRequested)
{
rc = session.DGControl.PendingXfers.Reset(pending);
}
else
{
if (!preXferArgs.CancelCurrent)
{
if (xferImage)
{
switch (imgXferMech)
{
case XferMech.Memory:
rc = DoImageMemoryXfer(session);
break;
case XferMech.File:
rc = DoImageFileXfer(session);
break;
case XferMech.MemFile:
rc = DoImageMemoryFileXfer(session);
break;
case XferMech.Native:
default: // always assume native
rc = DoImageNativeXfer(session);
break;
}
}
if (xferAudio)
{
switch (audXferMech)
{
case XferMech.File:
rc = DoAudioFileXfer(session);
break;
case XferMech.Native:
default: // always assume native
rc = DoAudioNativeXfer(session);
break;
}
}
}
if (rc != ReturnCode.Success && session.StopOnTransferError)
{
// end xfer without setting rc to exit (good/bad?)
session.DGControl.PendingXfers.Reset(pending);
}
else
{
rc = session.DGControl.PendingXfers.EndXfer(pending);
}
}
#endregion
} while (rc == ReturnCode.Success && pending.Count != 0 && !session.CloseDSRequested);
}
else
{
HandleReturnCode(session, rc);
}
// some poorly written scanner drivers return failure on EndXfer so also check for pending count now.
// this may break with other sources but we'll see
if (//pending.Count == 0 &&
session.State > 5)
{
session.ChangeState(5, true);
session.DisableSource();
}
}
