Method AliITSRawStream::GetJitter is defined const as it should be. Classes AliITSRaw...

[u/mrichter/AliRoot.git] / ITS / AliITSRawStreamSDDBeamTest.cxx

diff --git a/ITS/AliITSRawStreamSDDBeamTest.cxx b/ITS/AliITSRawStreamSDDBeamTest.cxx
new file mode 100644 (file)
index 0000000..46dab01
--- /dev/null
+++ b/ITS/AliITSRawStreamSDDBeamTest.cxx
@@ -0,0 +1,161 @@
+/**************************************************************************
+ * Copyright(c) 2007-2009, 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.                  *
+ **************************************************************************/
+
+/* $Id: $*/
+
+///////////////////////////////////////////////////////////////////////////////
+///
+/// This class provides access to ITS SDD digits in beam test raw data
+///
+///////////////////////////////////////////////////////////////////////////////
+
+#include "AliLog.h"
+#include "AliITSRawStreamSDDBeamTest.h"
+#include "AliRawReader.h"
+
+
+ClassImp(AliITSRawStreamSDDBeamTest)
+  
+const UInt_t AliITSRawStreamSDDBeamTest::fgkCodeLength[8] =  {8, 18, 2, 3, 4, 5, 6, 7};
+
+//______________________________________________________________________
+AliITSRawStreamSDDBeamTest::AliITSRawStreamSDDBeamTest(AliRawReader* rawReader) :
+  AliITSRawStream(rawReader),
+fData(0),
+fSkip(0),
+fEventId(0),
+fCarlosId(-1),
+fChannel(0),
+fJitter(0)
+{
+// create an object to read ITS SDD raw digits
+  fRawReader->Reset();
+  fRawReader->SelectEquipment(17, 204, 204);
+
+
+}
+
+//______________________________________________________________________
+UInt_t AliITSRawStreamSDDBeamTest::ReadBits()
+{
+// read bits from the given channel
+  UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
+  fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel]; 
+  fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
+  return result;
+}
+
+//______________________________________________________________________
+Int_t AliITSRawStreamSDDBeamTest::DecompAmbra(Int_t value) const
+{
+  // AMBRA decompression (from 8 to 10 bit)
+  
+  if ((value & 0x80) == 0) {
+    return value & 0x7f;
+  } else if ((value & 0x40) == 0) {
+    return 0x081 + ((value & 0x3f) << 1);
+  } else if ((value & 0x20) == 0) {
+    return 0x104 + ((value & 0x1f) << 3);
+  } else {
+    return 0x208 + ((value & 0x1f) << 4);
+  }
+  
+}
+
+//______________________________________________________________________
+Bool_t AliITSRawStreamSDDBeamTest::Next()
+{
+// read the next raw digit
+// returns kFALSE if there is no digit left
+
+  // skip the first 8 words
+  while (fSkip < 8) {
+    if (!fRawReader->ReadNextInt(fData)) return kFALSE;
+    if ((fData >> 30) == 0x01) continue;  // JTAG word
+    if (fSkip == 4) {
+      if (fData != 0) {
+       Error("Next", "data not valid: %8.8d", fData);
+       return kFALSE;
+      }
+    }
+    fSkip++;
+  }
+
+  while (kTRUE) {
+    if ((fChannel < 0) || (fLastBit[0][fChannel] < fReadBits[0][fChannel])) {
+      if (!fRawReader->ReadNextInt(fData)) return kFALSE;  // read next word
+
+      fChannel = -1;
+      if ((fData >> 28) == 0x02) {           // header
+       fEventId = (fData >> 3) & 0x07FF;
+       fCarlosId = (fData >> 1) & 0x03;
+      } else if ((fData >> 28) == 0x03) {    // footer
+       // ignored
+      } else if ((fData >> 29) == 0x00) {    // error
+       if ((fData & 0x1FFFFFFF) != 0) {
+         Error("Next", "error codes = %x, %x\n", 
+               (fData >> 0) & 0x3FFF, (fData >> 14) & 0x3FFF);
+         return kFALSE;
+       }
+      } else if ((fData >> 30) == 0x01) {    // JTAG word
+       // ignored
+      } else if ((fData >> 30) == 0x02) {    // channel 0 data
+       fChannel = 0;
+      } else if ((fData >> 30) == 0x03) {    // channel 1 data
+       fChannel = 1;
+      } else {                               // unknown data format
+       Error("Next", "invalid data: %8.8x\n", fData);
+       return kFALSE;
+      }
+
+      if (fChannel >= 0) {          // add read word to the data
+       fChannelData[0][fChannel] += 
+         (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[0][fChannel]);
+       fLastBit[0][fChannel] += 30;
+      }
+
+    } else {  // decode data
+      if (fReadCode[0][fChannel]) {    // read the next code word
+       fChannelCode[0][fChannel] = ReadBits();
+       fReadCode[0][fChannel] = kFALSE;
+       fReadBits[0][fChannel] = fgkCodeLength[fChannelCode[0][fChannel]];
+
+      } else {                      // read the next data word
+       UInt_t data = ReadBits();
+       fReadCode[0][fChannel] = kTRUE;
+       fReadBits[0][fChannel] = 3;
+       if (fChannelCode[0][fChannel] == 0) {         // set the time bin
+         fTimeBin[0][fChannel] = data;
+       } else if (fChannelCode[0][fChannel] == 1) {  // next anode
+         fTimeBin[0][fChannel] = 0;
+         fAnode[0][fChannel]++;
+       } else {                                   // ADC signal data
+         fSignal = DecompAmbra(data + (1 << fChannelCode[0][fChannel]) + 
+           fLowThreshold[fChannel]);
+         fCoord1 = fAnode[0][fChannel];
+         fCoord2 = fTimeBin[0][fChannel];
+         fTimeBin[0][fChannel]++;
+         return kTRUE;
+       }
+      }
+    }
+  }
+
+  return kFALSE;
+}
+
+
+
+