X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=FMD%2FAliFMDRawStream.cxx;h=485e40fae3f1a99fb9bff8e39458098a532bd4ac;hb=17fdf3eeae2f0d26449202a53c5252954744750b;hp=d698fbcdd530f45638e6637172686aa68e149b84;hpb=56b1929b4687f57bebdd95309d2994db32b6255c;p=u%2Fmrichter%2FAliRoot.git

diff --git a/FMD/AliFMDRawStream.cxx b/FMD/AliFMDRawStream.cxx
index d698fbcdd53..485e40fae3f 100644
--- a/FMD/AliFMDRawStream.cxx
+++ b/FMD/AliFMDRawStream.cxx
@@ -19,38 +19,104 @@
 //                                                                          
 // Buffer to read RAW ALTRO FMD format from a AliRawReader 
 // 
+// This class derives from AliAltroBuffer, but overloads the memer
+// function Next to do some extra processing.  In particular, it tries
+// to autodetect the sample rate.  If zero-suppression was used when
+// writing the raw data, then the automatic discovery will not work,
+// and the sample rate should be set explicitly. 
 //
 #include "AliFMDRawStream.h"		// ALIFMDRAWSTREAM_H
-#include <AliRawReader.h>		// ALIRAWREADER_H
+// #include <AliRawReader.h>		// ALIRAWREADER_H
+#include "AliFMDParameters.h"
+// #include <AliLog.h>
+#include "AliFMDDebug.h" // Better debug macros
+// #include <iomanip>
+// #include <iostream>
+#include "AliRawReader.h"
+#include <climits>
 
 //____________________________________________________________________
-ClassImp(AliFMDRawStream);
+ClassImp(AliFMDRawStream)
+#if 0
+  ; // This is here to keep Emacs for indenting the next line
+#endif
 
 //____________________________________________________________________
-AliFMDRawStream::AliFMDRawStream(AliRawReader* reader, UShort_t sampleRate) 
-  : AliAltroRawStream(reader), 
-    fSampleRate(sampleRate),
-    fPrevTime(-1), 
-    fExplicitSampleRate(kFALSE)
+AliFMDRawStream::AliFMDRawStream(AliRawReader* reader) 
+  : AliAltroRawStream(reader)
 {
-  if (fSampleRate > 0) fExplicitSampleRate = kTRUE;
+  // CTOR 
+  reader->Reset();
+  // Select FMD DDL's 
+  SelectRawData("FMD");
 }
 
 //_____________________________________________________________________________
 Bool_t 
-AliFMDRawStream::Next()
+AliFMDRawStream::ReadChannel(UInt_t& ddl, UInt_t& addr, 
+			     UInt_t& len, volatile UShort_t* data)
 {
-  // read the next raw digit
-  // returns kFALSE if there is no digit left
-  fPrevTime = fTime;
-  if (AliAltroRawStream::Next()) {
-    if (!fExplicitSampleRate && fPrevPad != fPad) 
-      fSampleRate = fTimeBunch / 128;
-    return kTRUE;
-  }
-  return kFALSE;
+  // Read one channel and return.   Returns 0 when there's no more
+  // data. 
+  Int_t        l         = 0;
+  static Int_t last      = 0xFFFF; // 0xFFFF means signal is used
+  Bool_t       next      = kTRUE;
+  do {
+    Int_t signal = last;
+    if (last > 0x3FF) {
+      AliFMDDebug(30, ("Last is 0x%x, so reading a new word", last));
+      next   = Next();
+      if(!next){
+	AliFMDDebug(15, ("Read word # %d (!next)", l));
+	addr = GetPrevHWAddress();
+	ddl  = (GetPrevDDLNumber() < 0 ? UINT_MAX: UInt_t(GetPrevDDLNumber()));
+	len  = l+1; // Need to add one - l points to last valid index
+	last = signal;
+	break;
+      }
+      signal = GetSignal();
+      if (GetHWAddress() != GetPrevHWAddress() && GetPrevHWAddress() >= 0) {
+	AliFMDDebug(15, ("New hardware address, was 0x%x, now 0x%x", 
+			  GetPrevHWAddress(), GetHWAddress()));
+	addr = GetPrevHWAddress();
+	ddl  = (GetPrevDDLNumber() < 0 ? UINT_MAX : UInt_t(GetPrevDDLNumber()));
+	len  = l+1; // Need to add one - l points to last valid index
+	last = signal;
+	break;
+      }
+    }
+    // Sanity check - if the total bunch length is less than 1, then
+    // read until we get the next bunch. 
+    Int_t b  = GetTimeLength();
+    if (b < 1) { 
+      AliWarning(Form("Bunch length %0d is less than 0 for "
+		      "DDL %4d address 0x%03x", 
+		      b, ddl, addr));
+      last = 0xFFFF;
+      continue;
+    }
+
+    // Sanity check - if the current time is less than 0, then read
+    // until we get a new bunch. 
+    Int_t t  = GetTime();
+    if (t < 0) {
+      AliWarning(Form("Time %0d is less than 0 for DDL %4d address 0x%03x", 
+		      t, ddl, addr));
+      last = 0xFFFF;
+      continue;
+    }
+    l        = TMath::Max(l, t);
+    data[t]  = signal;
+    last     = 0xFFFF;
+#if 0
+    AliFMDDebug(signal > 512 ? 1 : 0, ("Signal @ %d (%d) is %d", 
+				       time, t, data[t]));
+#endif
+  } while (next);
+  return next;
 }
 
+
 //_____________________________________________________________________________
 //
 // EOF