New class which is used to read the CTP (trigger) raw data

diff --git a/STEER/AliCTPRawStream.cxx b/STEER/AliCTPRawStream.cxx
new file mode 100644 (file)
index 0000000..0f13c91
--- /dev/null
+++ b/STEER/AliCTPRawStream.cxx
@@ -0,0 +1,116 @@
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ *                                                                        *
+ * Author: The ALICE Off-line Project.                                    *
+ * Contributors are mentioned in the code where appropriate.              *
+ *                                                                        *
+ * Permission to use, copy, modify and distribute this software and its   *
+ * documentation strictly for non-commercial purposes is hereby granted   *
+ * without fee, provided that the above copyright notice appears in all   *
+ * copies and that both the copyright notice and this permission notice   *
+ * appear in the supporting documentation. The authors make no claims     *
+ * about the suitability of this software for any purpose. It is          *
+ * provided "as is" without express or implied warranty.                  *
+ **************************************************************************/
+
+///////////////////////////////////////////////////////////////////////////////
+///
+/// This class provides access to CTP DDL raw data.
+///
+/// The raw data format is taken form the trigger TDR.
+/// The meaning of the trigger class and cluster masks
+/// are given in the trigger description file (in /data)
+/// and in the AliCentralTrigger class.
+///
+///////////////////////////////////////////////////////////////////////////////
+
+#include "AliCTPRawStream.h"
+#include "AliRawReader.h"
+#include "AliLog.h"
+
+ClassImp(AliCTPRawStream)
+
+//_____________________________________________________________________________
+AliCTPRawStream::AliCTPRawStream(AliRawReader* rawReader) :
+  fClassMask(0),
+  fClusterMask(0),
+  fRawReader(rawReader)
+{
+  // create an object to read CTP raw data
+  //
+  // select the raw data corresponding to
+  // the CTP detector id
+  fRawReader->Reset();
+  AliDebug(1,Form("Selecting raw data for detector %d",kCTPIndex));
+  fRawReader->Select(kCTPIndex);
+}
+
+//_____________________________________________________________________________
+AliCTPRawStream::AliCTPRawStream(const AliCTPRawStream& stream) :
+  TObject(stream),
+  fClassMask(0),
+  fClusterMask(0),
+  fRawReader(NULL)
+{
+  // Copy constructor
+  AliFatal("Copy constructor not implemented");
+}
+
+//_____________________________________________________________________________
+AliCTPRawStream& AliCTPRawStream::operator = (const AliCTPRawStream& 
+                                             /* stream */)
+{
+  AliFatal("Assignment operator not implemented");
+  return *this;
+}
+
+//_____________________________________________________________________________
+AliCTPRawStream::~AliCTPRawStream()
+{
+  // destructor
+}
+
+//_____________________________________________________________________________
+void AliCTPRawStream::Reset()
+{
+  // reset raw stream params
+
+  fClassMask = fClusterMask = 0;
+
+  if (fRawReader) fRawReader->Reset();
+}
+
+//_____________________________________________________________________________
+Bool_t AliCTPRawStream::Next()
+{
+  // read the whole CTP raw data stream
+  // return kFALSE in case of error
+
+  UChar_t *data = NULL;
+
+  if (!fRawReader->ReadNextData(data)) return kFALSE;
+
+  if (fRawReader->GetDataSize() != 32) {
+    AliError(Form("Wrong CTP raw data size: %d",fRawReader->GetDataSize()));
+    return kFALSE;
+  }
+
+  fClusterMask = data[12] >> 2;
+
+  fClassMask =  ((ULong64_t)data[12] & 0x3) << 48;
+
+  fClassMask |= (ULong64_t)data[16] << 36;
+  fClassMask |= ((ULong64_t)data[17] & 0xF) << 44;
+
+  fClassMask |= (ULong64_t)data[20] << 24;
+  fClassMask |= ((ULong64_t)data[21] & 0xF) << 32;
+
+  fClassMask |= (ULong64_t)data[24] << 12;
+  fClassMask |= ((ULong64_t)data[25] & 0xF) << 20;
+
+  fClassMask |= (ULong64_t)data[28];
+  fClassMask |= ((ULong64_t)data[29] & 0xF) << 8;
+
+  return kTRUE;
+}
+

diff --git a/STEER/AliCTPRawStream.h b/STEER/AliCTPRawStream.h
new file mode 100644 (file)
index 0000000..d8e2ce9
--- /dev/null
+++ b/STEER/AliCTPRawStream.h
@@ -0,0 +1,44 @@
+#ifndef ALICTPRAWSTREAM_H
+#define ALICTPRAWSTREAM_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+///////////////////////////////////////////////////////////////////////////////
+///
+/// This is a class for reading the CTP (trigger) DDL raw data
+/// The format of the raw data is taken form the trigger TDR
+///
+///////////////////////////////////////////////////////////////////////////////
+
+#include <TObject.h>
+
+class AliRawReader;
+
+class AliCTPRawStream: public TObject {
+  public :
+    AliCTPRawStream(AliRawReader* rawReader);
+    virtual ~AliCTPRawStream();
+
+    virtual void             Reset();
+    virtual Bool_t           Next();
+
+    inline ULong64_t GetClassMask()   const { return fClassMask; }  // Provide the trigger class mask
+    inline UChar_t   GetClusterMask() const { return fClusterMask; }// Provide the trigger cluster mask
+
+  protected:
+    AliCTPRawStream(const AliCTPRawStream& stream);
+    AliCTPRawStream& operator = (const AliCTPRawStream& stream);
+
+  private:
+
+    ULong64_t        fClassMask;   // trigger class mask
+    UChar_t          fClusterMask; // trigger cluster mask
+
+    AliRawReader*    fRawReader;   // object for reading the raw data
+
+    enum {kCTPIndex = 17};         //CTP detector index (AliDAQConfig.h)
+
+    ClassDef(AliCTPRawStream, 0)   // class for reading CTP DDL raw data
+};
+
+#endif