[u/mrichter/AliRoot.git] / FMD / AliFMDRawWriter.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/
/* $Id$ */
/** @file    AliFMDRawWriter.cxx
    @author  Christian Holm Christensen <cholm@nbi.dk>
    @date    Mon Mar 27 12:45:56 2006
    @brief   Class to write raw data 
*/
//____________________________________________________________________
//
// Class to write ADC values to a raw data file
//
// This class writes FMD Raw data to a file.   The sample rate (number
// of times the ALTRO ADC samples each pre-amp. channel - that is,
// data from a single strip), can be set via SetSampleRate. 
//
// Zero-suppression can be enabled by calling SetThreshold with a
// non-zero argument.   ADC values less than the value set will not be
// written to output.   Note, that if you use zero-suppression, you
// need to explicitly set the sample rate when reading back the data
// with AliFMDRawReader. 
// 
// This class uses the AliAltroBuffer class to write the data in the
// ALTRO format.  See the Exec member function for more information on
// that format.  
//
// #include <AliLog.h>		// ALILOG_H
#include "AliFMDDebug.h" // Better debug macros
#include <AliLoader.h>		// ALILOADER_H
#include <AliAltroBuffer.h>     // ALIALTROBUFFER_H
#include "AliFMD.h"		// ALIFMD_H
#include "AliFMDParameters.h"	// ALIFMDPARAMETERS_H
#include "AliFMDDigit.h"	// ALIFMDDIGIT_H
#include "AliFMDRawWriter.h"	// ALIFMDRAWREADER_H 
#include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H
// #include "AliFMDAltroIO.h"   // ALIFMDALTROWRITER_H
#include <TArrayI.h>		// ROOT_TArrayI
#include <TArrayF.h>		// ROOT_TArrayI
#include <TArrayC.h>		// ROOT_TArrayI
#include <TClonesArray.h>	// ROOT_TClonesArray
// #include <fstream>
#include "AliDAQ.h"

//____________________________________________________________________
ClassImp(AliFMDRawWriter)
#if 0
  ; // This is here to keep Emacs for indenting the next line
#endif

//____________________________________________________________________
AliFMDRawWriter::AliFMDRawWriter(AliFMD* fmd) 
  : TTask("FMDRawWriter", "Writer of Raw ADC values from the FMD"),
    fFMD(fmd),
    fSampleRate(0), 
    fChannelsPerAltro(0), 
    fThreshold(0)
{
  // CTOR 
  AliFMDDebug(5, ("Created AliFMDRawWriter object"));
}


//____________________________________________________________________
void
AliFMDRawWriter::Exec(Option_t*) 
{
  // Turn digits into raw data. 
  // 
  // Digits are read from the Digit branch, and processed to make
  // three DDL files, one for each of the sub-detectors FMD1, FMD2,
  // and FMD3. 
  //
  // The raw data files consists of a header, followed by ALTRO
  // formatted blocks.  
  // 
  //          +-------------+
  //          | Header      |
  //          +-------------+
  //          | ALTRO Block |
  //          | ...         |
  //          +-------------+
  //          DDL file 
  // 
  // An ALTRO formatted block, in the FMD context, consists of a
  // number of counts followed by a trailer. 
  // 
  //          +------------------+
  //          | Count            |
  //          | ...              |
  //          | possible fillers |
  //          +------------------+
  //          | Trailer          |
  //          +------------------+
  //          ALTRO block 
  // 
  // The counts are listed backwards, that is, starting with the
  // latest count, and ending in the first. 
  // 
  // Each count consist of 1 or more ADC samples of the VA1_ALICE
  // pre-amp. signal.  Just how many samples are used depends on
  // whether the ALTRO over samples the pre-amp.  Each sample is a
  // 10-bit word, and the samples are grouped into 40-bit blocks 
  //
  //          +------------------------------------+
  //          |  S(1)   | S(2)   | S(3)   | S(4)   |
  //          |  ...    | ...    | ...    | ...    |
  //          |  S(n)   | T(n)   | n+2    | 2AA    |
  //          +------------------------------------+
  //          Counts + possible filler 
  //
  // The trailer of the number of words of signales, the starting
  // strip number, the sector number, and the ring ID; each 10-bit
  // words,  packed into 40-bits. 
  // 
  //          +------------------------------------+
  //          |   2AAA   |  Len   |  A |  Address  |
  //          +------------------------------------+
  //          Trailer
  // 
  // Note, that this method assumes that the digits are ordered. 
  // 
  AliLoader* loader = fFMD->GetLoader();
  loader->LoadDigits("READ");
  TTree* digitTree = loader->TreeD();
  if (!digitTree) {
    AliError("no digit tree");
    return;
  }
  
  TClonesArray* digits = new TClonesArray("AliFMDDigit", 1000);
  fFMD->SetTreeAddress();
  TBranch* digitBranch = digitTree->GetBranch(fFMD->GetName());
  if (!digitBranch) {
    AliError(Form("no branch for %s", fFMD->GetName()));
    return;
  }
  digitBranch->SetAddress(&digits);
  
  Int_t nEvents = Int_t(digitTree->GetEntries());
  AliFMDDebug(5, ("Got a total of %5d events from tree", nEvents));
  for (Int_t event = 0; event < nEvents; event++) {
    fFMD->ResetDigits();
    digitTree->GetEvent(event);
    
    // Write out the digits
    WriteDigits(digits);
  }
  loader->UnloadDigits();
}

#if 1
//____________________________________________________________________
void
AliFMDRawWriter::WriteDigits(TClonesArray* digits)
{
  // WRite an array of digits to disk file 
  Int_t nDigits = digits->GetEntries();
  if (nDigits < 1) return;
  AliFMDDebug(5, ("Got a total of %5d digits from tree", nDigits));

  AliFMDParameters* pars = AliFMDParameters::Instance();
  UShort_t threshold    = 0;
  UInt_t   prevddl      = 0xFFFF;
  UInt_t   prevaddr     = 0xFFF;
  // UShort_t prevStrip    = 0;
  
  // Which channel number in the ALTRO channel we're at 
  UShort_t nWords       = 0;
  UShort_t preSamples   = 0;
  UShort_t sampleRate   = 0;
  
  // A buffer to hold 1 ALTRO channel - Normally, one ALTRO channel
  // holds 128 VA1_ALICE channels, sampled at a rate of `sampleRate' 
  TArrayI data(pars->GetChannelsPerAltro() * 8);
  TArrayF peds(pars->GetChannelsPerAltro() * 8);
  TArrayF noise(pars->GetChannelsPerAltro() * 8);

  // The Altro buffer 
  AliAltroBuffer* altro = 0;
  
  Int_t totalWords = 0;
  Int_t nCounts    = 0;
  
  // Loop over the digits in the event.  Note, that we assume the
  // the digits are in order in the branch.   If they were not, we'd
  // have to cache all channels before we could write the data to
  // the ALTRO buffer, or we'd have to set up a map of the digits. 
  UShort_t oldDet = 1000;
  for (Int_t i = 0; i < nDigits; i++) {
    // Get the digit
    AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
    UShort_t det    = digit->Detector();
    Char_t   ring   = digit->Ring();
    UShort_t sector = digit->Sector();
    UShort_t strip  = digit->Strip();
    UInt_t   ddl;
    UInt_t   addr;  
    UShort_t time;

    AliFMDDebug(15, ("Processing digit # %5d FMD%d%c[%2d,%3d]", 
		    i, det, ring, sector, strip));
    threshold  = pars->GetZeroSuppression(det, ring, sector, strip);
    sampleRate = pars->GetSampleRate(det, ring, sector, strip);
    preSamples = pars->GetPreSamples(det, ring, sector, strip);

    if (det != oldDet) {
      AliFMDDebug(5, ("Got new detector: %d (was %d)", det, oldDet));
      oldDet = det;
    }
    AliFMDDebug(15, ("Sample rate is %d", sampleRate));
    
    for (UShort_t j = 0; j < sampleRate; j++) { 
      if (!pars->Detector2Hardware(det,ring,sector,strip,j,ddl,addr,time)){
	AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]-%d", 
		      det, ring, sector, strip, j));
	continue;
      }
    
      AliFMDDebug(10, ("FMD%d%c[%2d,%3d]-%d-> 0x%x/0x%x/%04d", 
		       det, ring, sector, strip, j, ddl, addr, time));
      if (addr != prevaddr) {
	// Flush a channel to output 
	AliFMDDebug(5, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d]-%d"
			 "(b: 0x%02x, a: 0x%01x, c: 0x%02x, t: %04d), "
			 "flushing old channel at 0x%x with %d words", 
			 addr, det, ring, sector, strip, j,
			 (addr >> 7), (addr >> 4) & 0x7, addr & 0xf, 
			 time, prevaddr, nWords));
	totalWords += nWords;
	ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold);
	if (altro) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold);
	data.Reset(-1);
	peds.Reset(0);
	noise.Reset(0);
	nWords   = 0;
	prevaddr = addr;
      }
      if (ddl != prevddl) {
	AliFMDDebug(10, ("FMD: New DDL, was %d, now %d", prevddl, ddl));
	// If an altro exists, delete the object, flushing the data to
	// disk, and closing the file. 
	if (altro) { 
	  // When the first argument is false, we write the real
	  // header. 
	  AliFMDDebug(15, ("Closing output"));
	  altro->Flush();
	  altro->WriteDataHeader(kFALSE, kFALSE);
	  delete altro;
	  altro = 0;
	}
	prevddl = ddl;
	// Need to open a new DDL! 
	TString filename(AliDAQ::DdlFileName(fFMD->GetName(),  ddl));
	AliFMDDebug(5, ("New altro buffer with DDL file %s", filename.Data()));
	// Create a new altro buffer - a `1' as the second argument
	// means `write mode' 
	altro = new AliAltroBuffer(filename.Data());
	altro->SetMapping(pars->GetAltroMap());      
	// Write a dummy (first argument is true) header to the DDL
	// file - later on, when we close the file, we write the real
	// header
	altro->WriteDataHeader(kTRUE, kFALSE);
      }
    
      // Get the pedestal value 
      peds[time]  = pars->GetPedestal(det, ring, sector, strip);
      noise[time] = pars->GetPedestalWidth(det, ring, sector, strip);

      // Store the counts of the ADC in the channel buffer 
      AliFMDDebug(15, ("Storing FMD%d%c[%02d,%03d]-%d in timebin %d (%d)",
		      det, ring, sector, strip, j, time, preSamples));
      data[time] = digit->Count(j);
      nWords++;
      nCounts++;
      if (time == preSamples) {
	AliFMDDebug(15, ("Filling in %4d for %d presamples", 
			data[time], preSamples));
	for (int k = 0; k < preSamples; k++) { 
	  peds[k]  = peds[time];
	  noise[k] = noise[time];
	  data[k]  = data[time];
	}
	nWords += preSamples;
      }
    }
  }
  // Finally, we need to close the final ALTRO buffer if it wasn't
  // already 
  if (altro) {
    ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold);
    if (nWords > 0) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold);
    altro->Flush();
    altro->WriteDataHeader(kFALSE, kFALSE);
    delete altro;
  }
  AliFMDDebug(5, ("Wrote a total of %d words for %d counts", 
		  nWords, nCounts));
}
//____________________________________________________________________
void
AliFMDRawWriter::ZeroSuppress(Int_t*& data, Int_t nWords, 
			      const Float_t* peds, 
			      const Float_t* noise, UShort_t threshold) const
{
  // Simulate the ALTRO zero-suppression filter.  The data passed in
  // the first array is modified, such that all suppressed channels
  // are set to some value below threshold.  
  // 
  // If threshold == 0 zero suppression is considered disabled, and no
  // action is taken. 
  if (threshold <= 0) return;

  // const Short_t width  = 3;
  // If fPedSubtract is false, compare data-(ped+f*noise), if true
  // always modify data by -(ped+f*noise), and force negative values
  // to zero.
  Bool_t   pedSubtract = AliFMDParameters::Instance()->IsZSPedSubtract();
  UShort_t pre         = AliFMDParameters::Instance()->GetZSPreSamples();
  UShort_t post        = AliFMDParameters::Instance()->GetZSPostSamples();
  Float_t  factor      = AliFMDParameters::Instance()->GetPedestalFactor();
  
  TArrayC mask(nWords+1);
  for (Short_t i = 0; i < nWords; i++) { 
    Float_t            val     = data[i] - peds[i] - factor * noise[i];
    if (val < 0.5)     val     = 0;
    if (pedSubtract)   data[i] = Int_t(val) & 0x3FF;

    mask[i] = (val > threshold ? 1 : 0);
    AliFMDDebug(10, ("Comparing sample %d %d-%f-%f*%f=%f to %d -> %s", 
		     i, data[i], peds[i], factor, noise[i], val, threshold, 
		    (mask[i] ? "above" : "below")));
  }
  
  for (Short_t i = 0; i < nWords; i++) { 
    if (mask[i]) { // Signal above, so do nothing 
      AliFMDDebug(10, ("Sample %d, above", i));
      if (i < nWords-1 && !mask[i+1]) { 
	// After a valid sample.  Increase the pointer to the next
	// possible data, thereby skipping over the post-samples 
	AliFMDDebug(10, ("At sample %d, next is below, skipping %d to %d", 
			i, post, i+post));
	i += post;
      }
      continue;
    }
    
    Short_t lookahead = TMath::Min(Short_t(nWords), Short_t(i+pre));
    AliFMDDebug(10, ("Sample %d, below, look to %d", i, lookahead));
    if (mask[lookahead] && pre > 0) { 
      AliFMDDebug(10, ("Sample %d is a pre-sample to %d", i, lookahead));
      // We're in a presample, so don't modify the data, and increase
      // counter by the number of pre-samples 
      i += pre-1;
      continue;
    }
    
    // This sample must be surpressed 
    data[i] = threshold - 1;
  }
}

#else
//____________________________________________________________________
void
AliFMDRawWriter::WriteDigits(TClonesArray* digits)
{
  Int_t nDigits = digits->GetEntries();
  if (nDigits < 1) return;

  AliFMDParameters*  pars    = AliFMDParameters::Instance();
  AliFMDAltroWriter* writer  = 0;
  Int_t          sampleRate  = -1;
  UShort_t       hwaddr      = 0;
  UShort_t       ddl         = 0;
  std::ofstream* file        = 0;
  Int_t          ret         = 0;
  for (Int_t i = 0; i < nDigits; i++) {
    // Get the digit
    AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
    UInt_t   thisDDL, thisHwaddr;
    UShort_t det    = digit->Detector();
    Char_t   ring   = digit->Ring();
    UShort_t sector = digit->Sector();
    UShort_t strip  = digit->Strip();
    if (!pars->Detector2Hardware(det,ring,sector,strip,thisDDL,thisHwaddr)) {
      AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]",
		    det, ring, sector, strip));
      continue;
    }
    AliFMDDebug(40, ("Got DDL=%d and address=%d from FMD%d%c[%2d,%3d]", 
		     thisDDL, thisHwaddr, det, ring, sector, strip));
    // Check if we're still in the same channel
    if (thisHwaddr != hwaddr) {
      AliFMDDebug(30, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d] "
		       "(board 0x%x, chip 0x%x, channel 0x%x)",
		       thisHwaddr, det, ring, sector, strip, 
		       (thisHwaddr >> 7), (thisHwaddr >> 4) & 0x7, 
		       thisHwaddr & 0xf));
      if (writer) writer->AddChannelTrailer(hwaddr);
      hwaddr = thisHwaddr;
    }
    // Check if we're still in the same detector (DDL)
    if (ddl != thisDDL) {
      if (writer) {
	AliFMDDebug(1, ("Closing altro writer %p", writer));
	if ((ret = writer->Close()) < 0) {
	  AliError(Form("Error: %s", writer->ErrorString(ret)));
	  return;
	}
	delete writer;
	writer = 0;
	file->close();
	delete file;
	file = 0;
      }
      ddl = thisDDL;
    }
    // If we haven't got a writer (either because none were made so
    // far, or because we've switch DDL), make one. 
    if (!writer) {
      AliFMDDebug(1, ("Opening new ALTRO writer w/file %s", 
		      AliDAQ::DdlFileName("FMD",ddl)));
      file   = new std::ofstream(AliDAQ::DdlFileName("FMD",ddl));
      if (!file || !*file) {
	AliFatal(Form("Failed to open file %s", 
		      AliDAQ::DdlFileName("FMD",ddl)));
	return;
      }
      writer  = new AliFMDAltroWriter(*file);
      writer->SetThreshold(pars->GetZeroSuppression(det, ring, sector, strip));
    }
    // Write out our signal
    sampleRate =  pars->GetSampleRate(det,ring,sector,strip);
    writer->AddSignal(digit->Count1());
    if (sampleRate >= 2) writer->AddSignal(digit->Count2());
    if (sampleRate >= 3) writer->AddSignal(digit->Count3());
  }
  if (writer) {
    writer->AddChannelTrailer(hwaddr);
    writer->Close();
    delete writer;
    file->close();
    delete file;
  }
}
#endif


//____________________________________________________________________
// 
// EOF
//
Commit	Line	Data
e802be3e	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
e802be3e	15	/* $Id$ */
c2fc1258	16	/** @file AliFMDRawWriter.cxx
	17	@author Christian Holm Christensen <cholm@nbi.dk>
	18	@date Mon Mar 27 12:45:56 2006
	19	@brief Class to write raw data
	20	*/
e802be3e	21	//____________________________________________________________________
	22	//
	23	// Class to write ADC values to a raw data file
	24	//
7684b53c	25	// This class writes FMD Raw data to a file. The sample rate (number
	26	// of times the ALTRO ADC samples each pre-amp. channel - that is,
	27	// data from a single strip), can be set via SetSampleRate.
	28	//
	29	// Zero-suppression can be enabled by calling SetThreshold with a
	30	// non-zero argument. ADC values less than the value set will not be
	31	// written to output. Note, that if you use zero-suppression, you
	32	// need to explicitly set the sample rate when reading back the data
	33	// with AliFMDRawReader.
	34	//
	35	// This class uses the AliAltroBuffer class to write the data in the
	36	// ALTRO format. See the Exec member function for more information on
	37	// that format.
	38	//
f95a63c4	39	// #include <AliLog.h> // ALILOG_H
f95a63c4	40	#include "AliFMDDebug.h" // Better debug macros
56b1929b	41	#include <AliLoader.h> // ALILOADER_H
56b1929b	42	#include <AliAltroBuffer.h> // ALIALTROBUFFER_H
e802be3e	43	#include "AliFMD.h" // ALIFMD_H
1a1fdef7	44	#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
e802be3e	45	#include "AliFMDDigit.h" // ALIFMDDIGIT_H
e802be3e	46	#include "AliFMDRawWriter.h" // ALIFMDRAWREADER_H
1e8f773e	47	#include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H
c2fc1258	48	// #include "AliFMDAltroIO.h" // ALIFMDALTROWRITER_H
56b1929b	49	#include <TArrayI.h> // ROOT_TArrayI
cce354f6	50	#include <TArrayF.h> // ROOT_TArrayI
cce354f6	51	#include <TArrayC.h> // ROOT_TArrayI
e802be3e	52	#include <TClonesArray.h> // ROOT_TClonesArray
02a27b50	53	// #include <fstream>
362c9d61	54	#include "AliDAQ.h"
e802be3e	55
e802be3e	56	//____________________________________________________________________
925e6570	57	ClassImp(AliFMDRawWriter)
1a1fdef7	58	#if 0
	59	; // This is here to keep Emacs for indenting the next line
	60	#endif
e802be3e	61
	62	//____________________________________________________________________
	63	AliFMDRawWriter::AliFMDRawWriter(AliFMD* fmd)
	64	: TTask("FMDRawWriter", "Writer of Raw ADC values from the FMD"),
b5ee4425	65	fFMD(fmd),
	66	fSampleRate(0),
	67	fChannelsPerAltro(0),
	68	fThreshold(0)
02a27b50	69	{
02a27b50	70	// CTOR
ef8e8623	71	AliFMDDebug(5, ("Created AliFMDRawWriter object"));
02a27b50	72	}
02a27b50	73
e802be3e	74
	75
	76	//____________________________________________________________________
	77	void
	78	AliFMDRawWriter::Exec(Option_t*)
	79	{
	80	// Turn digits into raw data.
	81	//
	82	// Digits are read from the Digit branch, and processed to make
	83	// three DDL files, one for each of the sub-detectors FMD1, FMD2,
	84	// and FMD3.
	85	//
	86	// The raw data files consists of a header, followed by ALTRO
	87	// formatted blocks.
	88	//
	89	// +-------------+
	90	// \| Header \|
	91	// +-------------+
	92	// \| ALTRO Block \|
	93	// \| ... \|
	94	// +-------------+
	95	// DDL file
	96	//
	97	// An ALTRO formatted block, in the FMD context, consists of a
	98	// number of counts followed by a trailer.
	99	//
	100	// +------------------+
	101	// \| Count \|
	102	// \| ... \|
	103	// \| possible fillers \|
	104	// +------------------+
	105	// \| Trailer \|
	106	// +------------------+
	107	// ALTRO block
	108	//
	109	// The counts are listed backwards, that is, starting with the
	110	// latest count, and ending in the first.
	111	//
	112	// Each count consist of 1 or more ADC samples of the VA1_ALICE
	113	// pre-amp. signal. Just how many samples are used depends on
	114	// whether the ALTRO over samples the pre-amp. Each sample is a
	115	// 10-bit word, and the samples are grouped into 40-bit blocks
	116	//
	117	// +------------------------------------+
c2fc1258	118	// \| S(1) \| S(2) \| S(3) \| S(4) \|
e802be3e	119	// \| ... \| ... \| ... \| ... \|
c2fc1258	120	// \| S(n) \| T(n) \| n+2 \| 2AA \|
e802be3e	121	// +------------------------------------+
	122	// Counts + possible filler
	123	//
	124	// The trailer of the number of words of signales, the starting
	125	// strip number, the sector number, and the ring ID; each 10-bit
	126	// words, packed into 40-bits.
	127	//
	128	// +------------------------------------+
c2fc1258	129	// \| 2AAA \| Len \| A \| Address \|
e802be3e	130	// +------------------------------------+
	131	// Trailer
	132	//
	133	// Note, that this method assumes that the digits are ordered.
	134	//
	135	AliLoader* loader = fFMD->GetLoader();
ef8e8623	136	loader->LoadDigits("READ");
e802be3e	137	TTree* digitTree = loader->TreeD();
e802be3e	138	if (!digitTree) {
ef8e8623	139	AliError("no digit tree");
e802be3e	140	return;
	141	}
	142
	143	TClonesArray* digits = new TClonesArray("AliFMDDigit", 1000);
	144	fFMD->SetTreeAddress();
	145	TBranch* digitBranch = digitTree->GetBranch(fFMD->GetName());
	146	if (!digitBranch) {
ef8e8623	147	AliError(Form("no branch for %s", fFMD->GetName()));
e802be3e	148	return;
	149	}
	150	digitBranch->SetAddress(&digits);
	151
	152	Int_t nEvents = Int_t(digitTree->GetEntries());
f95a63c4	153	AliFMDDebug(5, ("Got a total of %5d events from tree", nEvents));
e802be3e	154	for (Int_t event = 0; event < nEvents; event++) {
	155	fFMD->ResetDigits();
	156	digitTree->GetEvent(event);
	157
1e8f773e	158	// Write out the digits
	159	WriteDigits(digits);
	160	}
	161	loader->UnloadDigits();
	162	}
e802be3e	163
c2fc1258	164	#if 1
	165	//____________________________________________________________________
	166	void
	167	AliFMDRawWriter::WriteDigits(TClonesArray* digits)
	168	{
02a27b50	169	// WRite an array of digits to disk file
c2fc1258	170	Int_t nDigits = digits->GetEntries();
c2fc1258	171	if (nDigits < 1) return;
f95a63c4	172	AliFMDDebug(5, ("Got a total of %5d digits from tree", nDigits));
c2fc1258	173
	174	AliFMDParameters* pars = AliFMDParameters::Instance();
	175	UShort_t threshold = 0;
f95a63c4	176	UInt_t prevddl = 0xFFFF;
c2fc1258	177	UInt_t prevaddr = 0xFFF;
	178	// UShort_t prevStrip = 0;
	179
	180	// Which channel number in the ALTRO channel we're at
	181	UShort_t nWords = 0;
	182	UShort_t preSamples = 0;
f38b1653	183	UShort_t sampleRate = 0;
c2fc1258	184
	185	// A buffer to hold 1 ALTRO channel - Normally, one ALTRO channel
	186	// holds 128 VA1_ALICE channels, sampled at a rate of `sampleRate'
	187	TArrayI data(pars->GetChannelsPerAltro() * 8);
cce354f6	188	TArrayF peds(pars->GetChannelsPerAltro() * 8);
cce354f6	189	TArrayF noise(pars->GetChannelsPerAltro() * 8);
c2fc1258	190
	191	// The Altro buffer
	192	AliAltroBuffer* altro = 0;
f38b1653	193
	194	Int_t totalWords = 0;
	195	Int_t nCounts = 0;
	196
c2fc1258	197	// Loop over the digits in the event. Note, that we assume the
	198	// the digits are in order in the branch. If they were not, we'd
	199	// have to cache all channels before we could write the data to
	200	// the ALTRO buffer, or we'd have to set up a map of the digits.
f95a63c4	201	UShort_t oldDet = 1000;
c2fc1258	202	for (Int_t i = 0; i < nDigits; i++) {
	203	// Get the digit
	204	AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
c2fc1258	205	UShort_t det = digit->Detector();
	206	Char_t ring = digit->Ring();
	207	UShort_t sector = digit->Sector();
	208	UShort_t strip = digit->Strip();
	209	UInt_t ddl;
	210	UInt_t addr;
f38b1653	211	UShort_t time;
f38b1653	212
cce354f6	213	AliFMDDebug(15, ("Processing digit # %5d FMD%d%c[%2d,%3d]",
f38b1653	214	i, det, ring, sector, strip));
	215	threshold = pars->GetZeroSuppression(det, ring, sector, strip);
	216	sampleRate = pars->GetSampleRate(det, ring, sector, strip);
	217	preSamples = pars->GetPreSamples(det, ring, sector, strip);
	218
f95a63c4	219	if (det != oldDet) {
	220	AliFMDDebug(5, ("Got new detector: %d (was %d)", det, oldDet));
	221	oldDet = det;
	222	}
cce354f6	223	AliFMDDebug(15, ("Sample rate is %d", sampleRate));
625d7886	224
f38b1653	225	for (UShort_t j = 0; j < sampleRate; j++) {
	226	if (!pars->Detector2Hardware(det,ring,sector,strip,j,ddl,addr,time)){
	227	AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]-%d",
	228	det, ring, sector, strip, j));
	229	continue;
c2fc1258	230	}
c2fc1258	231
f38b1653	232	AliFMDDebug(10, ("FMD%d%c[%2d,%3d]-%d-> 0x%x/0x%x/%04d",
	233	det, ring, sector, strip, j, ddl, addr, time));
	234	if (addr != prevaddr) {
	235	// Flush a channel to output
	236	AliFMDDebug(5, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d]-%d"
	237	"(b: 0x%02x, a: 0x%01x, c: 0x%02x, t: %04d), "
	238	"flushing old channel at 0x%x with %d words",
	239	addr, det, ring, sector, strip, j,
	240	(addr >> 7), (addr >> 4) & 0x7, addr & 0xf,
	241	time, prevaddr, nWords));
	242	totalWords += nWords;
cce354f6	243	ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold);
f38b1653	244	if (altro) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold);
cce354f6	245	data.Reset(-1);
	246	peds.Reset(0);
	247	noise.Reset(0);
f38b1653	248	nWords = 0;
	249	prevaddr = addr;
	250	}
	251	if (ddl != prevddl) {
	252	AliFMDDebug(10, ("FMD: New DDL, was %d, now %d", prevddl, ddl));
	253	// If an altro exists, delete the object, flushing the data to
	254	// disk, and closing the file.
	255	if (altro) {
	256	// When the first argument is false, we write the real
	257	// header.
	258	AliFMDDebug(15, ("Closing output"));
	259	altro->Flush();
	260	altro->WriteDataHeader(kFALSE, kFALSE);
	261	delete altro;
	262	altro = 0;
	263	}
	264	prevddl = ddl;
	265	// Need to open a new DDL!
	266	TString filename(AliDAQ::DdlFileName(fFMD->GetName(), ddl));
	267	AliFMDDebug(5, ("New altro buffer with DDL file %s", filename.Data()));
	268	// Create a new altro buffer - a `1' as the second argument
	269	// means `write mode'
	270	altro = new AliAltroBuffer(filename.Data());
	271	altro->SetMapping(pars->GetAltroMap());
	272	// Write a dummy (first argument is true) header to the DDL
	273	// file - later on, when we close the file, we write the real
	274	// header
	275	altro->WriteDataHeader(kTRUE, kFALSE);
	276	}
	277
cce354f6	278	// Get the pedestal value
	279	peds[time] = pars->GetPedestal(det, ring, sector, strip);
	280	noise[time] = pars->GetPedestalWidth(det, ring, sector, strip);
	281
f38b1653	282	// Store the counts of the ADC in the channel buffer
cce354f6	283	AliFMDDebug(15, ("Storing FMD%d%c[%02d,%03d]-%d in timebin %d (%d)",
f38b1653	284	det, ring, sector, strip, j, time, preSamples));
cce354f6	285	data[time] = digit->Count(j);
c2fc1258	286	nWords++;
f38b1653	287	nCounts++;
f38b1653	288	if (time == preSamples) {
cce354f6	289	AliFMDDebug(15, ("Filling in %4d for %d presamples",
	290	data[time], preSamples));
	291	for (int k = 0; k < preSamples; k++) {
	292	peds[k] = peds[time];
	293	noise[k] = noise[time];
	294	data[k] = data[time];
	295	}
f38b1653	296	nWords += preSamples;
f38b1653	297	}
c2fc1258	298	}
	299	}
	300	// Finally, we need to close the final ALTRO buffer if it wasn't
	301	// already
	302	if (altro) {
cce354f6	303	ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold);
c2fc1258	304	if (nWords > 0) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold);
	305	altro->Flush();
	306	altro->WriteDataHeader(kFALSE, kFALSE);
	307	delete altro;
	308	}
f38b1653	309	AliFMDDebug(5, ("Wrote a total of %d words for %d counts",
f38b1653	310	nWords, nCounts));
c2fc1258	311	}
cce354f6	312	//____________________________________________________________________
	313	void
	314	AliFMDRawWriter::ZeroSuppress(Int_t*& data, Int_t nWords,
	315	const Float_t* peds,
	316	const Float_t* noise, UShort_t threshold) const
	317	{
	318	// Simulate the ALTRO zero-suppression filter. The data passed in
	319	// the first array is modified, such that all suppressed channels
	320	// are set to some value below threshold.
	321	//
	322	// If threshold == 0 zero suppression is considered disabled, and no
	323	// action is taken.
	324	if (threshold <= 0) return;
	325
	326	// const Short_t width = 3;
	327	// If fPedSubtract is false, compare data-(ped+f*noise), if true
	328	// always modify data by -(ped+f*noise), and force negative values
	329	// to zero.
	330	Bool_t pedSubtract = AliFMDParameters::Instance()->IsZSPedSubtract();
	331	UShort_t pre = AliFMDParameters::Instance()->GetZSPreSamples();
	332	UShort_t post = AliFMDParameters::Instance()->GetZSPostSamples();
	333	Float_t factor = AliFMDParameters::Instance()->GetPedestalFactor();
	334
	335	TArrayC mask(nWords+1);
	336	for (Short_t i = 0; i < nWords; i++) {
	337	Float_t val = data[i] - peds[i] - factor * noise[i];
	338	if (val < 0.5) val = 0;
	339	if (pedSubtract) data[i] = Int_t(val) & 0x3FF;
	340
	341	mask[i] = (val > threshold ? 1 : 0);
	342	AliFMDDebug(10, ("Comparing sample %d %d-%f-%f*%f=%f to %d -> %s",
	343	i, data[i], peds[i], factor, noise[i], val, threshold,
	344	(mask[i] ? "above" : "below")));
	345	}
	346
	347	for (Short_t i = 0; i < nWords; i++) {
	348	if (mask[i]) { // Signal above, so do nothing
	349	AliFMDDebug(10, ("Sample %d, above", i));
	350	if (i < nWords-1 && !mask[i+1]) {
	351	// After a valid sample. Increase the pointer to the next
	352	// possible data, thereby skipping over the post-samples
	353	AliFMDDebug(10, ("At sample %d, next is below, skipping %d to %d",
	354	i, post, i+post));
	355	i += post;
	356	}
	357	continue;
	358	}
	359
	360	Short_t lookahead = TMath::Min(Short_t(nWords), Short_t(i+pre));
	361	AliFMDDebug(10, ("Sample %d, below, look to %d", i, lookahead));
	362	if (mask[lookahead] && pre > 0) {
	363	AliFMDDebug(10, ("Sample %d is a pre-sample to %d", i, lookahead));
	364	// We're in a presample, so don't modify the data, and increase
	365	// counter by the number of pre-samples
	366	i += pre-1;
	367	continue;
	368	}
	369
	370	// This sample must be surpressed
	371	data[i] = threshold - 1;
	372	}
	373	}
	374
c2fc1258	375	#else
1e8f773e	376	//____________________________________________________________________
	377	void
	378	AliFMDRawWriter::WriteDigits(TClonesArray* digits)
	379	{
	380	Int_t nDigits = digits->GetEntries();
	381	if (nDigits < 1) return;
e802be3e	382
1e8f773e	383	AliFMDParameters* pars = AliFMDParameters::Instance();
	384	AliFMDAltroWriter* writer = 0;
	385	Int_t sampleRate = -1;
	386	UShort_t hwaddr = 0;
	387	UShort_t ddl = 0;
	388	std::ofstream* file = 0;
	389	Int_t ret = 0;
	390	for (Int_t i = 0; i < nDigits; i++) {
	391	// Get the digit
	392	AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
	393	UInt_t thisDDL, thisHwaddr;
	394	UShort_t det = digit->Detector();
	395	Char_t ring = digit->Ring();
	396	UShort_t sector = digit->Sector();
	397	UShort_t strip = digit->Strip();
	398	if (!pars->Detector2Hardware(det,ring,sector,strip,thisDDL,thisHwaddr)) {
	399	AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]",
	400	det, ring, sector, strip));
	401	continue;
	402	}
f95a63c4	403	AliFMDDebug(40, ("Got DDL=%d and address=%d from FMD%d%c[%2d,%3d]",
1e8f773e	404	thisDDL, thisHwaddr, det, ring, sector, strip));
	405	// Check if we're still in the same channel
	406	if (thisHwaddr != hwaddr) {
f95a63c4	407	AliFMDDebug(30, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d] "
1e8f773e	408	"(board 0x%x, chip 0x%x, channel 0x%x)",
	409	thisHwaddr, det, ring, sector, strip,
	410	(thisHwaddr >> 7), (thisHwaddr >> 4) & 0x7,
	411	thisHwaddr & 0xf));
	412	if (writer) writer->AddChannelTrailer(hwaddr);
	413	hwaddr = thisHwaddr;
	414	}
	415	// Check if we're still in the same detector (DDL)
	416	if (ddl != thisDDL) {
	417	if (writer) {
f95a63c4	418	AliFMDDebug(1, ("Closing altro writer %p", writer));
1e8f773e	419	if ((ret = writer->Close()) < 0) {
	420	AliError(Form("Error: %s", writer->ErrorString(ret)));
	421	return;
	422	}
	423	delete writer;
	424	writer = 0;
	425	file->close();
	426	delete file;
	427	file = 0;
	428	}
	429	ddl = thisDDL;
	430	}
	431	// If we haven't got a writer (either because none were made so
	432	// far, or because we've switch DDL), make one.
	433	if (!writer) {
f95a63c4	434	AliFMDDebug(1, ("Opening new ALTRO writer w/file %s",
f95a63c4	435	AliDAQ::DdlFileName("FMD",ddl)));
362c9d61	436	file = new std::ofstream(AliDAQ::DdlFileName("FMD",ddl));
1e8f773e	437	if (!file \|\| !*file) {
f95a63c4	438	AliFatal(Form("Failed to open file %s",
f95a63c4	439	AliDAQ::DdlFileName("FMD",ddl)));
1e8f773e	440	return;
	441	}
	442	writer = new AliFMDAltroWriter(*file);
	443	writer->SetThreshold(pars->GetZeroSuppression(det, ring, sector, strip));
1e8f773e	444	}
1e8f773e	445	// Write out our signal
c2fc1258	446	sampleRate = pars->GetSampleRate(det,ring,sector,strip);
1e8f773e	447	writer->AddSignal(digit->Count1());
	448	if (sampleRate >= 2) writer->AddSignal(digit->Count2());
	449	if (sampleRate >= 3) writer->AddSignal(digit->Count3());
	450	}
	451	if (writer) {
	452	writer->AddChannelTrailer(hwaddr);
	453	writer->Close();
	454	delete writer;
	455	file->close();
	456	delete file;
	457	}
	458	}
9f662337	459	#endif
7684b53c	460
c2fc1258	461
7684b53c	462
7684b53c	463
e802be3e	464	//____________________________________________________________________
	465	//
	466	// EOF
	467	//