About dcmAutoDetectDatasetXfer

[kamil]

/** This flag defines whether the transfer syntax for uncompressed datasets
* is detected automatically. The automatic detection has been introduced
* since there are (incorrectly encoded) DICOM dataset stored with a
* different transfer syntax than specified in the meta header.
*/
extern OFGlobal<OFBool> dcmAutoDetectDatasetXfer; /* default OFFalse */

Code: Select all

OFCondition DcmDataset::read(DcmInputStream &inStream,
                             const E_TransferSyntax xfer,
                             const E_GrpLenEncoding glenc,
                             const Uint32 maxReadLength)
{
    ...

    if (dcmAutoDetectDatasetXfer.get())
    {
    ...
    }
    else    //default behaviour
   {
   }

    ...

}

It is in Dataset way to read this stream, why it has relationship with meta head when the automatic detection occured?
When and how do the automatic detection start?