/[svn]/libgig/trunk/src/gig.cpp

Diff of /libgig/trunk/src/gig.cpp

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-revision 1292 by schoenebeck,
Sat Aug 11 14:38:51 2007 UTC
+revision 2913 by schoenebeck,
Tue May 17 15:19:33 2016 UTC
 Line 2
   *                                                                         *
   *   libgig - C++ cross-platform Gigasampler format file access library    *
   *                                                                         *
-  *   Copyright (C) 2003-2007 by Christian Schoenebeck                      *
+  *   Copyright (C) 2003-2016 by Christian Schoenebeck                      *
   *                              <cuse@users.sourceforge.net>               *
   *                                                                         *
   *   This library is free software; you can redistribute it and/or modify  *
 Line 25
  #include "helper.h"
+ #include <algorithm>
  #include <math.h>
  #include <iostream>
+ #include <assert.h>
+ /// libgig's current file format version (for extending the original Giga file
+ /// format with libgig's own custom data / custom features).
+ #define GIG_FILE_EXT_VERSION    2
  /// Initial size of the sample buffer which is used for decompression of
  /// compressed sample wave streams - this value should always be bigger than
-Line 51
+Line 57
  namespace gig {
- // *************** progress_t ***************
- // *
-     progress_t::progress_t() {
-         callback    = NULL;
-         custom      = NULL;
-         __range_min = 0.0f;
-         __range_max = 1.0f;
-     }
-     // private helper function to convert progress of a subprocess into the global progress
-     static void __notify_progress(progress_t* pProgress, float subprogress) {
-         if (pProgress && pProgress->callback) {
-             const float totalrange    = pProgress->__range_max - pProgress->__range_min;
-             const float totalprogress = pProgress->__range_min + subprogress * totalrange;
-             pProgress->factor         = totalprogress;
-             pProgress->callback(pProgress); // now actually notify about the progress
-         }
-     }
-     // private helper function to divide a progress into subprogresses
-     static void __divide_progress(progress_t* pParentProgress, progress_t* pSubProgress, float totalTasks, float currentTask) {
-         if (pParentProgress && pParentProgress->callback) {
-             const float totalrange    = pParentProgress->__range_max - pParentProgress->__range_min;
-             pSubProgress->callback    = pParentProgress->callback;
-             pSubProgress->custom      = pParentProgress->custom;
-             pSubProgress->__range_min = pParentProgress->__range_min + totalrange * currentTask / totalTasks;
-             pSubProgress->__range_max = pSubProgress->__range_min + totalrange / totalTasks;
-         }
-     }
  // *************** Internal functions for sample decompression ***************
  // *
-Line 121 
 namespace {
+Line 95 
 namespace {
      void Decompress16(int compressionmode, const unsigned char* params,
                        int srcStep, int dstStep,
                        const unsigned char* pSrc, int16_t* pDst,
-                       unsigned long currentframeoffset,
+                       file_offset_t currentframeoffset,
-                       unsigned long copysamples)
+                       file_offset_t copysamples)
      {
          switch (compressionmode) {
              case 0: // 16 bit uncompressed
-Line 158 
 namespace {
+Line 132 
 namespace {
      void Decompress24(int compressionmode, const unsigned char* params,
                        int dstStep, const unsigned char* pSrc, uint8_t* pDst,
-                       unsigned long currentframeoffset,
+                       file_offset_t currentframeoffset,
-                       unsigned long copysamples, int truncatedBits)
+                       file_offset_t copysamples, int truncatedBits)
      {
          int y, dy, ddy, dddy;
-Line 255 
 namespace {
+Line 229 
 namespace {
+ // *************** Internal CRC-32 (Cyclic Redundancy Check) functions  ***************
+ // *
+     static uint32_t* __initCRCTable() {
+         static uint32_t res[256];
+         for (int i = 0 ; i < 256 ; i++) {
+             uint32_t c = i;
+             for (int j = 0 ; j < 8 ; j++) {
+                 c = (c & 1) ? 0xedb88320 ^ (c >> 1) : c >> 1;
+             }
+             res[i] = c;
+         }
+         return res;
+     }
+     static const uint32_t* __CRCTable = __initCRCTable();
+     /**
+      * Initialize a CRC variable.
+      *
+      * @param crc - variable to be initialized
+      */
+     inline static void __resetCRC(uint32_t& crc) {
+         crc = 0xffffffff;
+     }
+     /**
+      * Used to calculate checksums of the sample data in a gig file. The
+      * checksums are stored in the 3crc chunk of the gig file and
+      * automatically updated when a sample is written with Sample::Write().
+      *
+      * One should call __resetCRC() to initialize the CRC variable to be
+      * used before calling this function the first time.
+      *
+      * After initializing the CRC variable one can call this function
+      * arbitrary times, i.e. to split the overall CRC calculation into
+      * steps.
+      *
+      * Once the whole data was processed by __calculateCRC(), one should
+      * call __encodeCRC() to get the final CRC result.
+      *
+      * @param buf     - pointer to data the CRC shall be calculated of
+      * @param bufSize - size of the data to be processed
+      * @param crc     - variable the CRC sum shall be stored to
+      */
+     static void __calculateCRC(unsigned char* buf, int bufSize, uint32_t& crc) {
+         for (int i = 0 ; i < bufSize ; i++) {
+             crc = __CRCTable[(crc ^ buf[i]) & 0xff] ^ (crc >> 8);
+         }
+     }
+     /**
+      * Returns the final CRC result.
+      *
+      * @param crc - variable previously passed to __calculateCRC()
+      */
+     inline static uint32_t __encodeCRC(const uint32_t& crc) {
+         return crc ^ 0xffffffff;
+     }
  // *************** Other Internal functions  ***************
  // *
-Line 278 
 namespace {
+Line 315 
 namespace {
- // *************** CRC ***************
- // *
-     const uint32_t* CRC::table(initTable());
-     uint32_t* CRC::initTable() {
-         uint32_t* res = new uint32_t[256];
-         for (int i = 0 ; i < 256 ; i++) {
-             uint32_t c = i;
-             for (int j = 0 ; j < 8 ; j++) {
-                 c = (c & 1) ? 0xedb88320 ^ (c >> 1) : c >> 1;
-             }
-             res[i] = c;
-         }
-         return res;
-     }
  // *************** Sample ***************
  // *
-Line 322 
 namespace {
+Line 339 
 namespace {
       * @param fileNo         - number of an extension file where this sample
       *                         is located, 0 otherwise
       */
-     Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset, unsigned long fileNo) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) {
+     Sample::Sample(File* pFile, RIFF::List* waveList, file_offset_t WavePoolOffset, unsigned long fileNo) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) {
-         static const DLS::Info::FixedStringLength fixedStringLengths[] = {
+         static const DLS::Info::string_length_t fixedStringLengths[] = {
              { CHUNK_ID_INAM, 64 },
              { 0, 0 }
          };
-         pInfo->FixedStringLengths = fixedStringLengths;
+         pInfo->SetFixedStringLengths(fixedStringLengths);
          Instances++;
          FileNo = fileNo;
+         __resetCRC(crc);
          pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX);
          if (pCk3gix) {
              uint16_t iSampleGroup = pCk3gix->ReadInt16();
-Line 408 
 namespace {
+Line 427 
 namespace {
      }
      /**
+      * Make a (semi) deep copy of the Sample object given by @a orig (without
+      * the actual waveform data) and assign it to this object.
+      *
+      * Discussion: copying .gig samples is a bit tricky. It requires three
+      * steps:
+      * 1. Copy sample's meta informations (done by CopyAssignMeta()) including
+      *    its new sample waveform data size.
+      * 2. Saving the file (done by File::Save()) so that it gains correct size
+      *    and layout for writing the actual wave form data directly to disc
+      *    in next step.
+      * 3. Copy the waveform data with disk streaming (done by CopyAssignWave()).
+      *
+      * @param orig - original Sample object to be copied from
+      */
+     void Sample::CopyAssignMeta(const Sample* orig) {
+         // handle base classes
+         DLS::Sample::CopyAssignCore(orig);
+         // handle actual own attributes of this class
+         Manufacturer = orig->Manufacturer;
+         Product = orig->Product;
+         SamplePeriod = orig->SamplePeriod;
+         MIDIUnityNote = orig->MIDIUnityNote;
+         FineTune = orig->FineTune;
+         SMPTEFormat = orig->SMPTEFormat;
+         SMPTEOffset = orig->SMPTEOffset;
+         Loops = orig->Loops;
+         LoopID = orig->LoopID;
+         LoopType = orig->LoopType;
+         LoopStart = orig->LoopStart;
+         LoopEnd = orig->LoopEnd;
+         LoopSize = orig->LoopSize;
+         LoopFraction = orig->LoopFraction;
+         LoopPlayCount = orig->LoopPlayCount;
+         // schedule resizing this sample to the given sample's size
+         Resize(orig->GetSize());
+     }
+     /**
+      * Should be called after CopyAssignMeta() and File::Save() sequence.
+      * Read more about it in the discussion of CopyAssignMeta(). This method
+      * copies the actual waveform data by disk streaming.
+      *
+      * @e CAUTION: this method is currently not thread safe! During this
+      * operation the sample must not be used for other purposes by other
+      * threads!
+      *
+      * @param orig - original Sample object to be copied from
+      */
+     void Sample::CopyAssignWave(const Sample* orig) {
+         const int iReadAtOnce = 32*1024;
+         char* buf = new char[iReadAtOnce * orig->FrameSize];
+         Sample* pOrig = (Sample*) orig; //HACK: remove constness for now
+         file_offset_t restorePos = pOrig->GetPos();
+         pOrig->SetPos(0);
+         SetPos(0);
+         for (file_offset_t n = pOrig->Read(buf, iReadAtOnce); n;
+                            n = pOrig->Read(buf, iReadAtOnce))
+         {
+             Write(buf, n);
+         }
+         pOrig->SetPos(restorePos);
+         delete [] buf;
+     }
+     /**
       * Apply sample and its settings to the respective RIFF chunks. You have
       * to call File::Save() to make changes persistent.
       *
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
       *
+      * @param pProgress - callback function for progress notification
       * @throws DLS::Exception if FormatTag != DLS_WAVE_FORMAT_PCM or no sample data
       *                        was provided yet
       * @throws gig::Exception if there is any invalid sample setting
       */
-     void Sample::UpdateChunks() {
+     void Sample::UpdateChunks(progress_t* pProgress) {
          // first update base class's chunks
-         DLS::Sample::UpdateChunks();
+         DLS::Sample::UpdateChunks(pProgress);
          // make sure 'smpl' chunk exists
          pCkSmpl = pWaveList->GetSubChunk(CHUNK_ID_SMPL);
-Line 468 
 namespace {
+Line 555 
 namespace {
          // update '3gix' chunk
          pData = (uint8_t*) pCk3gix->LoadChunkData();
          store16(&pData[0], iSampleGroup);
+         // if the library user toggled the "Compressed" attribute from true to
+         // false, then the EWAV chunk associated with compressed samples needs
+         // to be deleted
+         RIFF::Chunk* ewav = pWaveList->GetSubChunk(CHUNK_ID_EWAV);
+         if (ewav && !Compressed) {
+             pWaveList->DeleteSubChunk(ewav);
+         }
      }
      /// Scans compressed samples for mandatory informations (e.g. actual number of total sample points).
      void Sample::ScanCompressedSample() {
          //TODO: we have to add some more scans here (e.g. determine compression rate)
          this->SamplesTotal = 0;
-         std::list<unsigned long> frameOffsets;
+         std::list<file_offset_t> frameOffsets;
          SamplesPerFrame = BitDepth == 24 ? 256 : 2048;
          WorstCaseFrameSize = SamplesPerFrame * FrameSize + Channels; // +Channels for compression flag
-Line 490 
 namespace {
+Line 585 
 namespace {
                  const int mode_l = pCkData->ReadUint8();
                  const int mode_r = pCkData->ReadUint8();
                  if (mode_l > 5 || mode_r > 5) throw gig::Exception("Unknown compression mode");
-                 const unsigned long frameSize = bytesPerFrame[mode_l] + bytesPerFrame[mode_r];
+                 const file_offset_t frameSize = bytesPerFrame[mode_l] + bytesPerFrame[mode_r];
                  if (pCkData->RemainingBytes() <= frameSize) {
                      SamplesInLastFrame =
-Line 509 
 namespace {
+Line 604 
 namespace {
                  const int mode = pCkData->ReadUint8();
                  if (mode > 5) throw gig::Exception("Unknown compression mode");
-                 const unsigned long frameSize = bytesPerFrame[mode];
+                 const file_offset_t frameSize = bytesPerFrame[mode];
                  if (pCkData->RemainingBytes() <= frameSize) {
                      SamplesInLastFrame =
-Line 525 
 namespace {
+Line 620 
 namespace {
          // Build the frames table (which is used for fast resolving of a frame's chunk offset)
          if (FrameTable) delete[] FrameTable;
-         FrameTable = new unsigned long[frameOffsets.size()];
+         FrameTable = new file_offset_t[frameOffsets.size()];
-         std::list<unsigned long>::iterator end  = frameOffsets.end();
+         std::list<file_offset_t>::iterator end  = frameOffsets.end();
-         std::list<unsigned long>::iterator iter = frameOffsets.begin();
+         std::list<file_offset_t>::iterator iter = frameOffsets.begin();
          for (int i = 0; iter != end; i++, iter++) {
              FrameTable[i] = *iter;
          }
-Line 568 
 namespace {
+Line 663 
 namespace {
       *                      the cached sample data in bytes
       * @see                 ReleaseSampleData(), Read(), SetPos()
       */
-     buffer_t Sample::LoadSampleData(unsigned long SampleCount) {
+     buffer_t Sample::LoadSampleData(file_offset_t SampleCount) {
          return LoadSampleDataWithNullSamplesExtension(SampleCount, 0); // 0 amount of NullSamples
      }
-Line 627 
 namespace {
+Line 722 
 namespace {
       *                           size of the cached sample data in bytes
       * @see                      ReleaseSampleData(), Read(), SetPos()
       */
-     buffer_t Sample::LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount) {
+     buffer_t Sample::LoadSampleDataWithNullSamplesExtension(file_offset_t SampleCount, uint NullSamplesCount) {
          if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal;
          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
-         unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize;
+         file_offset_t allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize;
+         SetPos(0); // reset read position to begin of sample
          RAMCache.pStart            = new int8_t[allocationsize];
          RAMCache.Size              = Read(RAMCache.pStart, SampleCount) * this->FrameSize;
          RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
-Line 668 
 namespace {
+Line 764 
 namespace {
          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
          RAMCache.pStart = NULL;
          RAMCache.Size   = 0;
+         RAMCache.NullExtensionSize = 0;
      }
      /** @brief Resize sample.
-Line 726 
 namespace {
+Line 823 
 namespace {
       * @returns            the new sample position
       * @see                Read()
       */
-     unsigned long Sample::SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence) {
+     file_offset_t Sample::SetPos(file_offset_t SampleCount, RIFF::stream_whence_t Whence) {
          if (Compressed) {
              switch (Whence) {
                  case RIFF::stream_curpos:
-Line 744 
 namespace {
+Line 841 
 namespace {
              }
              if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal;
-             unsigned long frame = this->SamplePos / 2048; // to which frame to jump
+             file_offset_t frame = this->SamplePos / 2048; // to which frame to jump
              this->FrameOffset   = this->SamplePos % 2048; // offset (in sample points) within that frame
              pCkData->SetPos(FrameTable[frame]);           // set chunk pointer to the start of sought frame
              return this->SamplePos;
          }
          else { // not compressed
-             unsigned long orderedBytes = SampleCount * this->FrameSize;
+             file_offset_t orderedBytes = SampleCount * this->FrameSize;
-             unsigned long result = pCkData->SetPos(orderedBytes, Whence);
+             file_offset_t result = pCkData->SetPos(orderedBytes, Whence);
              return (result == orderedBytes) ? SampleCount
                                              : result / this->FrameSize;
          }
-Line 760 
 namespace {
+Line 857 
 namespace {
      /**
       * Returns the current position in the sample (in sample points).
       */
-     unsigned long Sample::GetPos() {
+     file_offset_t Sample::GetPos() const {
          if (Compressed) return SamplePos;
          else            return pCkData->GetPos() / FrameSize;
      }
-Line 799 
 namespace {
+Line 896 
 namespace {
       * @returns                number of successfully read sample points
       * @see                    CreateDecompressionBuffer()
       */
-     unsigned long Sample::ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState,
+     file_offset_t Sample::ReadAndLoop(void* pBuffer, file_offset_t SampleCount, playback_state_t* pPlaybackState,
                                        DimensionRegion* pDimRgn, buffer_t* pExternalDecompressionBuffer) {
-         unsigned long samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend;
+         file_offset_t samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend;
          uint8_t* pDst = (uint8_t*) pBuffer;
          SetPos(pPlaybackState->position); // recover position from the last time
-Line 839 
 namespace {
+Line 936 
 namespace {
                                  // reading, swap all sample frames so it reflects
                                  // backward playback
-                                 unsigned long swapareastart       = totalreadsamples;
+                                 file_offset_t swapareastart       = totalreadsamples;
-                                 unsigned long loopoffset          = GetPos() - loop.LoopStart;
+                                 file_offset_t loopoffset          = GetPos() - loop.LoopStart;
-                                 unsigned long samplestoreadinloop = Min(samplestoread, loopoffset);
+                                 file_offset_t samplestoreadinloop = Min(samplestoread, loopoffset);
-                                 unsigned long reverseplaybackend  = GetPos() - samplestoreadinloop;
+                                 file_offset_t reverseplaybackend  = GetPos() - samplestoreadinloop;
                                  SetPos(reverseplaybackend);
-Line 862 
 namespace {
+Line 959 
 namespace {
                                  }
                                  // reverse the sample frames for backward playback
-                                 SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize);
+                                 if (totalreadsamples > swapareastart) //FIXME: this if() is just a crash workaround for now (#102), but totalreadsamples <= swapareastart should never be the case, so there's probably still a bug above!
+                                     SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize);
                              }
                          } while (samplestoread && readsamples);
                          break;
-Line 889 
 namespace {
+Line 987 
 namespace {
                          // reading, swap all sample frames so it reflects
                          // backward playback
-                         unsigned long swapareastart       = totalreadsamples;
+                         file_offset_t swapareastart       = totalreadsamples;
-                         unsigned long loopoffset          = GetPos() - loop.LoopStart;
+                         file_offset_t loopoffset          = GetPos() - loop.LoopStart;
-                         unsigned long samplestoreadinloop = (this->LoopPlayCount) ? Min(samplestoread, pPlaybackState->loop_cycles_left * loop.LoopLength - loopoffset)
+                         file_offset_t samplestoreadinloop = (this->LoopPlayCount) ? Min(samplestoread, pPlaybackState->loop_cycles_left * loop.LoopLength - loopoffset)
                                                                                    : samplestoread;
-                         unsigned long reverseplaybackend  = loop.LoopStart + Abs((loopoffset - samplestoreadinloop) % loop.LoopLength);
+                         file_offset_t reverseplaybackend  = loop.LoopStart + Abs((loopoffset - samplestoreadinloop) % loop.LoopLength);
                          SetPos(reverseplaybackend);
-Line 973 
 namespace {
+Line 1071 
 namespace {
       * @returns            number of successfully read sample points
       * @see                SetPos(), CreateDecompressionBuffer()
       */
-     unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount, buffer_t* pExternalDecompressionBuffer) {
+     file_offset_t Sample::Read(void* pBuffer, file_offset_t SampleCount, buffer_t* pExternalDecompressionBuffer) {
          if (SampleCount == 0) return 0;
          if (!Compressed) {
              if (BitDepth == 24) {
-Line 988 
 namespace {
+Line 1086 
 namespace {
          else {
              if (this->SamplePos >= this->SamplesTotal) return 0;
              //TODO: efficiency: maybe we should test for an average compression rate
-             unsigned long assumedsize      = GuessSize(SampleCount),
+             file_offset_t assumedsize      = GuessSize(SampleCount),
                            remainingbytes   = 0,           // remaining bytes in the local buffer
                            remainingsamples = SampleCount,
                            copysamples, skipsamples,
-Line 1011 
 namespace {
+Line 1109 
 namespace {
              remainingbytes = pCkData->Read(pSrc, assumedsize, 1);
              while (remainingsamples && remainingbytes) {
-                 unsigned long framesamples = SamplesPerFrame;
+                 file_offset_t framesamples = SamplesPerFrame;
-                 unsigned long framebytes, rightChannelOffset = 0, nextFrameOffset;
+                 file_offset_t framebytes, rightChannelOffset = 0, nextFrameOffset;
                  int mode_l = *pSrc++, mode_r = 0;
-Line 1162 
 namespace {
+Line 1260 
 namespace {
       * @throws gig::Exception if sample is compressed
       * @see DLS::LoadSampleData()
       */
-     unsigned long Sample::Write(void* pBuffer, unsigned long SampleCount) {
+     file_offset_t Sample::Write(void* pBuffer, file_offset_t SampleCount) {
          if (Compressed) throw gig::Exception("There is no support for writing compressed gig samples (yet)");
          // if this is the first write in this sample, reset the
          // checksum calculator
          if (pCkData->GetPos() == 0) {
-             crc.reset();
+             __resetCRC(crc);
          }
          if (GetSize() < SampleCount) throw Exception("Could not write sample data, current sample size to small");
-         unsigned long res;
+         file_offset_t res;
          if (BitDepth == 24) {
              res = pCkData->Write(pBuffer, SampleCount * FrameSize, 1) / FrameSize;
          } else { // 16 bit
              res = Channels == 2 ? pCkData->Write(pBuffer, SampleCount << 1, 2) >> 1
                                  : pCkData->Write(pBuffer, SampleCount, 2);
          }
-         crc.update((unsigned char *)pBuffer, SampleCount * FrameSize);
+         __calculateCRC((unsigned char *)pBuffer, SampleCount * FrameSize, crc);
          // if this is the last write, update the checksum chunk in the
          // file
          if (pCkData->GetPos() == pCkData->GetSize()) {
              File* pFile = static_cast<File*>(GetParent());
-             pFile->SetSampleChecksum(this, crc.getValue());
+             pFile->SetSampleChecksum(this, __encodeCRC(crc));
          }
          return res;
      }
-Line 1205 
 namespace {
+Line 1303 
 namespace {
       * @returns allocated decompression buffer
       * @see DestroyDecompressionBuffer()
       */
-     buffer_t Sample::CreateDecompressionBuffer(unsigned long MaxReadSize) {
+     buffer_t Sample::CreateDecompressionBuffer(file_offset_t MaxReadSize) {
          buffer_t result;
          const double worstCaseHeaderOverhead =
                  (256.0 /*frame size*/ + 12.0 /*header*/ + 2.0 /*compression type flag (stereo)*/) / 256.0;
-         result.Size              = (unsigned long) (double(MaxReadSize) * 3.0 /*(24 Bit)*/ * 2.0 /*stereo*/ * worstCaseHeaderOverhead);
+         result.Size              = (file_offset_t) (double(MaxReadSize) * 3.0 /*(24 Bit)*/ * 2.0 /*stereo*/ * worstCaseHeaderOverhead);
          result.pStart            = new int8_t[result.Size];
          result.NullExtensionSize = 0;
          return result;
-Line 1262 
 namespace {
+Line 1360 
 namespace {
      uint                               DimensionRegion::Instances       = 0;
      DimensionRegion::VelocityTableMap* DimensionRegion::pVelocityTables = NULL;
-     DimensionRegion::DimensionRegion(RIFF::List* _3ewl) : DLS::Sampler(_3ewl) {
+     DimensionRegion::DimensionRegion(Region* pParent, RIFF::List* _3ewl) : DLS::Sampler(_3ewl) {
          Instances++;
          pSample = NULL;
+         pRegion = pParent;
          if (_3ewl->GetSubChunk(CHUNK_ID_WSMP)) memcpy(&Crossfade, &SamplerOptions, 4);
          else memset(&Crossfade, 0, 4);
-Line 1383 
 namespace {
+Line 1482 
 namespace {
                                                          : vcf_res_ctrl_none;
              uint16_t eg3depth = _3ewa->ReadUint16();
              EG3Depth = (eg3depth <= 1200) ? eg3depth /* positives */
-                                         : (-1) * (int16_t) ((eg3depth ^ 0xffff) + 1); /* binary complementary for negatives */
+                                         : (-1) * (int16_t) ((eg3depth ^ 0xfff) + 1); /* binary complementary for negatives */
              _3ewa->ReadInt16(); // unknown
              ChannelOffset = _3ewa->ReadUint8() / 4;
              uint8_t regoptions = _3ewa->ReadUint8();
-Line 1511 
 namespace {
+Line 1610 
 namespace {
                                                       VelocityResponseDepth,
                                                       VelocityResponseCurveScaling);
-         curve_type_t curveType = ReleaseVelocityResponseCurve;
+         pVelocityReleaseTable = GetReleaseVelocityTable(
-         uint8_t depth = ReleaseVelocityResponseDepth;
+                                     ReleaseVelocityResponseCurve,
+                                     ReleaseVelocityResponseDepth
+                                 );
+         pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve,
+                                                       VCFVelocityDynamicRange,
+                                                       VCFVelocityScale,
+                                                       VCFCutoffController);
-         // this models a strange behaviour or bug in GSt: two of the
+         SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360));
-         // velocity response curves for release time are not used even
+         VelocityTable = 0;
-         // if specified, instead another curve is chosen.
+     }
-         if ((curveType == curve_type_nonlinear && depth == 0) ||
-             (curveType == curve_type_special   && depth == 4)) {
-             curveType = curve_type_nonlinear;
-             depth = 3;
-         }
-         pVelocityReleaseTable = GetVelocityTable(curveType, depth, 0);
-         curveType = VCFVelocityCurve;
+     /*
-         depth = VCFVelocityDynamicRange;
+      * Constructs a DimensionRegion by copying all parameters from
+      * another DimensionRegion
+      */
+     DimensionRegion::DimensionRegion(RIFF::List* _3ewl, const DimensionRegion& src) : DLS::Sampler(_3ewl) {
+         Instances++;
+         //NOTE: I think we cannot call CopyAssign() here (in a constructor) as long as its a virtual method
+         *this = src; // default memberwise shallow copy of all parameters
+         pParentList = _3ewl; // restore the chunk pointer
+         // deep copy of owned structures
+         if (src.VelocityTable) {
+             VelocityTable = new uint8_t[128];
+             for (int k = 0 ; k < 128 ; k++)
+                 VelocityTable[k] = src.VelocityTable[k];
+         }
+         if (src.pSampleLoops) {
+             pSampleLoops = new DLS::sample_loop_t[src.SampleLoops];
+             for (int k = 0 ; k < src.SampleLoops ; k++)
+                 pSampleLoops[k] = src.pSampleLoops[k];
+         }
+     }
+     /**
+      * Make a (semi) deep copy of the DimensionRegion object given by @a orig
+      * and assign it to this object.
+      *
+      * Note that all sample pointers referenced by @a orig are simply copied as
+      * memory address. Thus the respective samples are shared, not duplicated!
+      *
+      * @param orig - original DimensionRegion object to be copied from
+      */
+     void DimensionRegion::CopyAssign(const DimensionRegion* orig) {
+         CopyAssign(orig, NULL);
+     }
-         // even stranger GSt: two of the velocity response curves for
+     /**
-         // filter cutoff are not used, instead another special curve
+      * Make a (semi) deep copy of the DimensionRegion object given by @a orig
-         // is chosen. This curve is not used anywhere else.
+      * and assign it to this object.
-         if ((curveType == curve_type_nonlinear && depth == 0) ||
+      *
-             (curveType == curve_type_special   && depth == 4)) {
+      * @param orig - original DimensionRegion object to be copied from
-             curveType = curve_type_special;
+      * @param mSamples - crosslink map between the foreign file's samples and
-             depth = 5;
+      *                   this file's samples
+      */
+     void DimensionRegion::CopyAssign(const DimensionRegion* orig, const std::map<Sample*,Sample*>* mSamples) {
+         // delete all allocated data first
+         if (VelocityTable) delete [] VelocityTable;
+         if (pSampleLoops) delete [] pSampleLoops;
+         // backup parent list pointer
+         RIFF::List* p = pParentList;
+         gig::Sample* pOriginalSample = pSample;
+         gig::Region* pOriginalRegion = pRegion;
+         //NOTE: copy code copied from assignment constructor above, see comment there as well
+         *this = *orig; // default memberwise shallow copy of all parameters
+         // restore members that shall not be altered
+         pParentList = p; // restore the chunk pointer
+         pRegion = pOriginalRegion;
+         // only take the raw sample reference reference if the
+         // two DimensionRegion objects are part of the same file
+         if (pOriginalRegion->GetParent()->GetParent() != orig->pRegion->GetParent()->GetParent()) {
+             pSample = pOriginalSample;
+         }
+         if (mSamples && mSamples->count(orig->pSample)) {
+             pSample = mSamples->find(orig->pSample)->second;
+         }
+         // deep copy of owned structures
+         if (orig->VelocityTable) {
+             VelocityTable = new uint8_t[128];
+             for (int k = 0 ; k < 128 ; k++)
+                 VelocityTable[k] = orig->VelocityTable[k];
+         }
+         if (orig->pSampleLoops) {
+             pSampleLoops = new DLS::sample_loop_t[orig->SampleLoops];
+             for (int k = 0 ; k < orig->SampleLoops ; k++)
+                 pSampleLoops[k] = orig->pSampleLoops[k];
          }
-         pVelocityCutoffTable = GetVelocityTable(curveType, depth,
+     }
-                                                 VCFCutoffController <= vcf_cutoff_ctrl_none2 ? VCFVelocityScale : 0);
+     /**
+      * Updates the respective member variable and updates @c SampleAttenuation
+      * which depends on this value.
+      */
+     void DimensionRegion::SetGain(int32_t gain) {
+         DLS::Sampler::SetGain(gain);
          SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360));
-         VelocityTable = 0;
      }
      /**
-Line 1548 
 namespace {
+Line 1725 
 namespace {
       *
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
+      *
+      * @param pProgress - callback function for progress notification
       */
-     void DimensionRegion::UpdateChunks() {
+     void DimensionRegion::UpdateChunks(progress_t* pProgress) {
-         // check if wsmp is going to be created by
-         // DLS::Sampler::UpdateChunks
-         bool wsmp_created = !pParentList->GetSubChunk(CHUNK_ID_WSMP);
          // first update base class's chunk
-         DLS::Sampler::UpdateChunks();
+         DLS::Sampler::UpdateChunks(pProgress);
          RIFF::Chunk* wsmp = pParentList->GetSubChunk(CHUNK_ID_WSMP);
          uint8_t* pData = (uint8_t*) wsmp->LoadChunkData();
-Line 1566 
 namespace {
+Line 1741 
 namespace {
          // make sure '3ewa' chunk exists
          RIFF::Chunk* _3ewa = pParentList->GetSubChunk(CHUNK_ID_3EWA);
-         if (!_3ewa)  _3ewa = pParentList->AddSubChunk(CHUNK_ID_3EWA, 140);
+         if (!_3ewa) {
-         else if (wsmp_created) {
+             File* pFile = (File*) GetParent()->GetParent()->GetParent();
-             // make sure the chunk order is: wsmp, 3ewa
+             bool version3 = pFile->pVersion && pFile->pVersion->major == 3;
-             pParentList->MoveSubChunk(_3ewa, 0);
+             _3ewa = pParentList->AddSubChunk(CHUNK_ID_3EWA, version3 ? 148 : 140);
          }
          pData = (uint8_t*) _3ewa->LoadChunkData();
-Line 1777 
 namespace {
+Line 1952 
 namespace {
          }
          const uint16_t eg3depth = (EG3Depth >= 0) ? EG3Depth
-                                                   : uint16_t(((-EG3Depth) - 1) ^ 0xffff); /* binary complementary for negatives */
+                                                   : uint16_t(((-EG3Depth) - 1) ^ 0xfff); /* binary complementary for negatives */
-         pData[116] = eg3depth;
+         store16(&pData[116], eg3depth);
          // next 2 bytes unknown
-Line 1825 
 namespace {
+Line 2000 
 namespace {
                                        (VCFKeyboardTrackingBreakpoint & 0x7f); /* lower 7 bits */
          pData[137] = vcfbreakpoint;
-         const uint8_t vcfvelocity = VCFVelocityDynamicRange % 5 |
+         const uint8_t vcfvelocity = VCFVelocityDynamicRange % 5 +
                                      VCFVelocityCurve * 5;
          pData[138] = vcfvelocity;
-Line 1837 
 namespace {
+Line 2012 
 namespace {
          }
      }
+     double* DimensionRegion::GetReleaseVelocityTable(curve_type_t releaseVelocityResponseCurve, uint8_t releaseVelocityResponseDepth) {
+         curve_type_t curveType = releaseVelocityResponseCurve;
+         uint8_t depth = releaseVelocityResponseDepth;
+         // this models a strange behaviour or bug in GSt: two of the
+         // velocity response curves for release time are not used even
+         // if specified, instead another curve is chosen.
+         if ((curveType == curve_type_nonlinear && depth == 0) ||
+             (curveType == curve_type_special   && depth == 4)) {
+             curveType = curve_type_nonlinear;
+             depth = 3;
+         }
+         return GetVelocityTable(curveType, depth, 0);
+     }
+     double* DimensionRegion::GetCutoffVelocityTable(curve_type_t vcfVelocityCurve,
+                                                     uint8_t vcfVelocityDynamicRange,
+                                                     uint8_t vcfVelocityScale,
+                                                     vcf_cutoff_ctrl_t vcfCutoffController)
+     {
+         curve_type_t curveType = vcfVelocityCurve;
+         uint8_t depth = vcfVelocityDynamicRange;
+         // even stranger GSt: two of the velocity response curves for
+         // filter cutoff are not used, instead another special curve
+         // is chosen. This curve is not used anywhere else.
+         if ((curveType == curve_type_nonlinear && depth == 0) ||
+             (curveType == curve_type_special   && depth == 4)) {
+             curveType = curve_type_special;
+             depth = 5;
+         }
+         return GetVelocityTable(curveType, depth,
+                                 (vcfCutoffController <= vcf_cutoff_ctrl_none2)
+                                     ? vcfVelocityScale : 0);
+     }
      // get the corresponding velocity table from the table map or create & calculate that table if it doesn't exist yet
      double* DimensionRegion::GetVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling)
      {
-Line 1852 
 namespace {
+Line 2061 
 namespace {
          return table;
      }
+     Region* DimensionRegion::GetParent() const {
+         return pRegion;
+     }
+ // show error if some _lev_ctrl_* enum entry is not listed in the following function
+ // (commented out for now, because "diagnostic push" not supported prior GCC 4.6)
+ // TODO: uncomment and add a GCC version check (see also commented "#pragma GCC diagnostic pop" below)
+ //#pragma GCC diagnostic push
+ //#pragma GCC diagnostic error "-Wswitch"
      leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) {
          leverage_ctrl_t decodedcontroller;
          switch (EncodedController) {
-Line 1963 
 namespace {
+Line 2182 
 namespace {
                  decodedcontroller.controller_number = 95;
                  break;
+             // format extension (these controllers are so far only supported by
+             // LinuxSampler & gigedit) they will *NOT* work with
+             // Gigasampler/GigaStudio !
+             case _lev_ctrl_CC3_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 3;
+                 break;
+             case _lev_ctrl_CC6_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 6;
+                 break;
+             case _lev_ctrl_CC7_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 7;
+                 break;
+             case _lev_ctrl_CC8_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 8;
+                 break;
+             case _lev_ctrl_CC9_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 9;
+                 break;
+             case _lev_ctrl_CC10_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 10;
+                 break;
+             case _lev_ctrl_CC11_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 11;
+                 break;
+             case _lev_ctrl_CC14_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 14;
+                 break;
+             case _lev_ctrl_CC15_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 15;
+                 break;
+             case _lev_ctrl_CC20_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 20;
+                 break;
+             case _lev_ctrl_CC21_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 21;
+                 break;
+             case _lev_ctrl_CC22_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 22;
+                 break;
+             case _lev_ctrl_CC23_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 23;
+                 break;
+             case _lev_ctrl_CC24_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 24;
+                 break;
+             case _lev_ctrl_CC25_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 25;
+                 break;
+             case _lev_ctrl_CC26_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 26;
+                 break;
+             case _lev_ctrl_CC27_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 27;
+                 break;
+             case _lev_ctrl_CC28_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 28;
+                 break;
+             case _lev_ctrl_CC29_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 29;
+                 break;
+             case _lev_ctrl_CC30_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 30;
+                 break;
+             case _lev_ctrl_CC31_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 31;
+                 break;
+             case _lev_ctrl_CC68_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 68;
+                 break;
+             case _lev_ctrl_CC69_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 69;
+                 break;
+             case _lev_ctrl_CC70_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 70;
+                 break;
+             case _lev_ctrl_CC71_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 71;
+                 break;
+             case _lev_ctrl_CC72_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 72;
+                 break;
+             case _lev_ctrl_CC73_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 73;
+                 break;
+             case _lev_ctrl_CC74_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 74;
+                 break;
+             case _lev_ctrl_CC75_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 75;
+                 break;
+             case _lev_ctrl_CC76_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 76;
+                 break;
+             case _lev_ctrl_CC77_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 77;
+                 break;
+             case _lev_ctrl_CC78_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 78;
+                 break;
+             case _lev_ctrl_CC79_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 79;
+                 break;
+             case _lev_ctrl_CC84_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 84;
+                 break;
+             case _lev_ctrl_CC85_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 85;
+                 break;
+             case _lev_ctrl_CC86_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 86;
+                 break;
+             case _lev_ctrl_CC87_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 87;
+                 break;
+             case _lev_ctrl_CC89_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 89;
+                 break;
+             case _lev_ctrl_CC90_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 90;
+                 break;
+             case _lev_ctrl_CC96_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 96;
+                 break;
+             case _lev_ctrl_CC97_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 97;
+                 break;
+             case _lev_ctrl_CC102_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 102;
+                 break;
+             case _lev_ctrl_CC103_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 103;
+                 break;
+             case _lev_ctrl_CC104_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 104;
+                 break;
+             case _lev_ctrl_CC105_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 105;
+                 break;
+             case _lev_ctrl_CC106_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 106;
+                 break;
+             case _lev_ctrl_CC107_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 107;
+                 break;
+             case _lev_ctrl_CC108_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 108;
+                 break;
+             case _lev_ctrl_CC109_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 109;
+                 break;
+             case _lev_ctrl_CC110_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 110;
+                 break;
+             case _lev_ctrl_CC111_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 111;
+                 break;
+             case _lev_ctrl_CC112_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 112;
+                 break;
+             case _lev_ctrl_CC113_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 113;
+                 break;
+             case _lev_ctrl_CC114_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 114;
+                 break;
+             case _lev_ctrl_CC115_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 115;
+                 break;
+             case _lev_ctrl_CC116_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 116;
+                 break;
+             case _lev_ctrl_CC117_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 117;
+                 break;
+             case _lev_ctrl_CC118_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 118;
+                 break;
+             case _lev_ctrl_CC119_EXT:
+                 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
+                 decodedcontroller.controller_number = 119;
+                 break;
              // unknown controller type
              default:
                  throw gig::Exception("Unknown leverage controller type.");
          }
          return decodedcontroller;
      }
+ // see above (diagnostic push not supported prior GCC 4.6)
+ //#pragma GCC diagnostic pop
      DimensionRegion::_lev_ctrl_t DimensionRegion::EncodeLeverageController(leverage_ctrl_t DecodedController) {
          _lev_ctrl_t encodedcontroller;
-Line 2056 
 namespace {
+Line 2518 
 namespace {
                      case 95:
                          encodedcontroller = _lev_ctrl_effect5depth;
                          break;
+                     // format extension (these controllers are so far only
+                     // supported by LinuxSampler & gigedit) they will *NOT*
+                     // work with Gigasampler/GigaStudio !
+                     case 3:
+                         encodedcontroller = _lev_ctrl_CC3_EXT;
+                         break;
+                     case 6:
+                         encodedcontroller = _lev_ctrl_CC6_EXT;
+                         break;
+                     case 7:
+                         encodedcontroller = _lev_ctrl_CC7_EXT;
+                         break;
+                     case 8:
+                         encodedcontroller = _lev_ctrl_CC8_EXT;
+                         break;
+                     case 9:
+                         encodedcontroller = _lev_ctrl_CC9_EXT;
+                         break;
+                     case 10:
+                         encodedcontroller = _lev_ctrl_CC10_EXT;
+                         break;
+                     case 11:
+                         encodedcontroller = _lev_ctrl_CC11_EXT;
+                         break;
+                     case 14:
+                         encodedcontroller = _lev_ctrl_CC14_EXT;
+                         break;
+                     case 15:
+                         encodedcontroller = _lev_ctrl_CC15_EXT;
+                         break;
+                     case 20:
+                         encodedcontroller = _lev_ctrl_CC20_EXT;
+                         break;
+                     case 21:
+                         encodedcontroller = _lev_ctrl_CC21_EXT;
+                         break;
+                     case 22:
+                         encodedcontroller = _lev_ctrl_CC22_EXT;
+                         break;
+                     case 23:
+                         encodedcontroller = _lev_ctrl_CC23_EXT;
+                         break;
+                     case 24:
+                         encodedcontroller = _lev_ctrl_CC24_EXT;
+                         break;
+                     case 25:
+                         encodedcontroller = _lev_ctrl_CC25_EXT;
+                         break;
+                     case 26:
+                         encodedcontroller = _lev_ctrl_CC26_EXT;
+                         break;
+                     case 27:
+                         encodedcontroller = _lev_ctrl_CC27_EXT;
+                         break;
+                     case 28:
+                         encodedcontroller = _lev_ctrl_CC28_EXT;
+                         break;
+                     case 29:
+                         encodedcontroller = _lev_ctrl_CC29_EXT;
+                         break;
+                     case 30:
+                         encodedcontroller = _lev_ctrl_CC30_EXT;
+                         break;
+                     case 31:
+                         encodedcontroller = _lev_ctrl_CC31_EXT;
+                         break;
+                     case 68:
+                         encodedcontroller = _lev_ctrl_CC68_EXT;
+                         break;
+                     case 69:
+                         encodedcontroller = _lev_ctrl_CC69_EXT;
+                         break;
+                     case 70:
+                         encodedcontroller = _lev_ctrl_CC70_EXT;
+                         break;
+                     case 71:
+                         encodedcontroller = _lev_ctrl_CC71_EXT;
+                         break;
+                     case 72:
+                         encodedcontroller = _lev_ctrl_CC72_EXT;
+                         break;
+                     case 73:
+                         encodedcontroller = _lev_ctrl_CC73_EXT;
+                         break;
+                     case 74:
+                         encodedcontroller = _lev_ctrl_CC74_EXT;
+                         break;
+                     case 75:
+                         encodedcontroller = _lev_ctrl_CC75_EXT;
+                         break;
+                     case 76:
+                         encodedcontroller = _lev_ctrl_CC76_EXT;
+                         break;
+                     case 77:
+                         encodedcontroller = _lev_ctrl_CC77_EXT;
+                         break;
+                     case 78:
+                         encodedcontroller = _lev_ctrl_CC78_EXT;
+                         break;
+                     case 79:
+                         encodedcontroller = _lev_ctrl_CC79_EXT;
+                         break;
+                     case 84:
+                         encodedcontroller = _lev_ctrl_CC84_EXT;
+                         break;
+                     case 85:
+                         encodedcontroller = _lev_ctrl_CC85_EXT;
+                         break;
+                     case 86:
+                         encodedcontroller = _lev_ctrl_CC86_EXT;
+                         break;
+                     case 87:
+                         encodedcontroller = _lev_ctrl_CC87_EXT;
+                         break;
+                     case 89:
+                         encodedcontroller = _lev_ctrl_CC89_EXT;
+                         break;
+                     case 90:
+                         encodedcontroller = _lev_ctrl_CC90_EXT;
+                         break;
+                     case 96:
+                         encodedcontroller = _lev_ctrl_CC96_EXT;
+                         break;
+                     case 97:
+                         encodedcontroller = _lev_ctrl_CC97_EXT;
+                         break;
+                     case 102:
+                         encodedcontroller = _lev_ctrl_CC102_EXT;
+                         break;
+                     case 103:
+                         encodedcontroller = _lev_ctrl_CC103_EXT;
+                         break;
+                     case 104:
+                         encodedcontroller = _lev_ctrl_CC104_EXT;
+                         break;
+                     case 105:
+                         encodedcontroller = _lev_ctrl_CC105_EXT;
+                         break;
+                     case 106:
+                         encodedcontroller = _lev_ctrl_CC106_EXT;
+                         break;
+                     case 107:
+                         encodedcontroller = _lev_ctrl_CC107_EXT;
+                         break;
+                     case 108:
+                         encodedcontroller = _lev_ctrl_CC108_EXT;
+                         break;
+                     case 109:
+                         encodedcontroller = _lev_ctrl_CC109_EXT;
+                         break;
+                     case 110:
+                         encodedcontroller = _lev_ctrl_CC110_EXT;
+                         break;
+                     case 111:
+                         encodedcontroller = _lev_ctrl_CC111_EXT;
+                         break;
+                     case 112:
+                         encodedcontroller = _lev_ctrl_CC112_EXT;
+                         break;
+                     case 113:
+                         encodedcontroller = _lev_ctrl_CC113_EXT;
+                         break;
+                     case 114:
+                         encodedcontroller = _lev_ctrl_CC114_EXT;
+                         break;
+                     case 115:
+                         encodedcontroller = _lev_ctrl_CC115_EXT;
+                         break;
+                     case 116:
+                         encodedcontroller = _lev_ctrl_CC116_EXT;
+                         break;
+                     case 117:
+                         encodedcontroller = _lev_ctrl_CC117_EXT;
+                         break;
+                     case 118:
+                         encodedcontroller = _lev_ctrl_CC118_EXT;
+                         break;
+                     case 119:
+                         encodedcontroller = _lev_ctrl_CC119_EXT;
+                         break;
                      default:
                          throw gig::Exception("leverage controller number is not supported by the gig format");
                  }
-Line 2105 
 namespace {
+Line 2749 
 namespace {
          return pVelocityCutoffTable[MIDIKeyVelocity];
      }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVelocityResponseCurve(curve_type_t curve) {
+         pVelocityAttenuationTable =
+             GetVelocityTable(
+                 curve, VelocityResponseDepth, VelocityResponseCurveScaling
+             );
+         VelocityResponseCurve = curve;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVelocityResponseDepth(uint8_t depth) {
+         pVelocityAttenuationTable =
+             GetVelocityTable(
+                 VelocityResponseCurve, depth, VelocityResponseCurveScaling
+             );
+         VelocityResponseDepth = depth;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVelocityResponseCurveScaling(uint8_t scaling) {
+         pVelocityAttenuationTable =
+             GetVelocityTable(
+                 VelocityResponseCurve, VelocityResponseDepth, scaling
+             );
+         VelocityResponseCurveScaling = scaling;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetReleaseVelocityResponseCurve(curve_type_t curve) {
+         pVelocityReleaseTable = GetReleaseVelocityTable(curve, ReleaseVelocityResponseDepth);
+         ReleaseVelocityResponseCurve = curve;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetReleaseVelocityResponseDepth(uint8_t depth) {
+         pVelocityReleaseTable = GetReleaseVelocityTable(ReleaseVelocityResponseCurve, depth);
+         ReleaseVelocityResponseDepth = depth;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVCFCutoffController(vcf_cutoff_ctrl_t controller) {
+         pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, VCFVelocityDynamicRange, VCFVelocityScale, controller);
+         VCFCutoffController = controller;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVCFVelocityCurve(curve_type_t curve) {
+         pVelocityCutoffTable = GetCutoffVelocityTable(curve, VCFVelocityDynamicRange, VCFVelocityScale, VCFCutoffController);
+         VCFVelocityCurve = curve;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVCFVelocityDynamicRange(uint8_t range) {
+         pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, range, VCFVelocityScale, VCFCutoffController);
+         VCFVelocityDynamicRange = range;
+     }
+     /**
+      * Updates the respective member variable and the lookup table / cache
+      * that depends on this value.
+      */
+     void DimensionRegion::SetVCFVelocityScale(uint8_t scaling) {
+         pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, VCFVelocityDynamicRange, scaling, VCFCutoffController);
+         VCFVelocityScale = scaling;
+     }
      double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) {
          // line-segment approximations of the 15 velocity curves
-Line 2188 
 namespace {
+Line 2922 
 namespace {
          // Actual Loading
+         if (!file->GetAutoLoad()) return;
          LoadDimensionRegions(rgnList);
          RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK);
-Line 2231 
 namespace {
+Line 2967 
 namespace {
              else
                  _3lnk->SetPos(44);
-             // load sample references
+             // load sample references (if auto loading is enabled)
-             for (uint i = 0; i < DimensionRegions; i++) {
+             if (file->GetAutoLoad()) {
-                 uint32_t wavepoolindex = _3lnk->ReadUint32();
+                 for (uint i = 0; i < DimensionRegions; i++) {
-                 if (file->pWavePoolTable) pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);
+                     uint32_t wavepoolindex = _3lnk->ReadUint32();
+                     if (file->pWavePoolTable) pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);
+                 }
+                 GetSample(); // load global region sample reference
              }
-             GetSample(); // load global region sample reference
          } else {
              DimensionRegions = 0;
              for (int i = 0 ; i < 8 ; i++) {
-Line 2251 
 namespace {
+Line 2989 
 namespace {
              RIFF::List* _3prg = rgnList->GetSubList(LIST_TYPE_3PRG);
              if (!_3prg) _3prg = rgnList->AddSubList(LIST_TYPE_3PRG);
              RIFF::List* _3ewl = _3prg->AddSubList(LIST_TYPE_3EWL);
-             pDimensionRegions[0] = new DimensionRegion(_3ewl);
+             pDimensionRegions[0] = new DimensionRegion(this, _3ewl);
              DimensionRegions = 1;
          }
      }
-Line 2263 
 namespace {
+Line 3001 
 namespace {
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
       *
+      * @param pProgress - callback function for progress notification
       * @throws gig::Exception if samples cannot be dereferenced
       */
-     void Region::UpdateChunks() {
+     void Region::UpdateChunks(progress_t* pProgress) {
          // in the gig format we don't care about the Region's sample reference
          // but we still have to provide some existing one to not corrupt the
          // file, so to avoid the latter we simply always assign the sample of
-Line 2273 
 namespace {
+Line 3012 
 namespace {
          pSample = pDimensionRegions[0]->pSample;
          // first update base class's chunks
-         DLS::Region::UpdateChunks();
+         DLS::Region::UpdateChunks(pProgress);
-         File* pFile = (File*) GetParent()->GetParent();
-         bool version3 = pFile->pVersion && pFile->pVersion->major == 3;
          // update dimension region's chunks
          for (int i = 0; i < DimensionRegions; i++) {
-             DimensionRegion* d = pDimensionRegions[i];
+             pDimensionRegions[i]->UpdateChunks(pProgress);
-             // make sure '3ewa' chunk exists (we need to this before
-             // calling DimensionRegion::UpdateChunks, as
-             // DimensionRegion doesn't know which file version it is)
-             RIFF::Chunk* _3ewa = d->pParentList->GetSubChunk(CHUNK_ID_3EWA);
-             if (!_3ewa) d->pParentList->AddSubChunk(CHUNK_ID_3EWA, version3 ? 148 : 140);
-             d->UpdateChunks();
          }
+         File* pFile = (File*) GetParent()->GetParent();
+         bool version3 = pFile->pVersion && pFile->pVersion->major == 3;
          const int iMaxDimensions =  version3 ? 8 : 5;
          const int iMaxDimensionRegions = version3 ? 256 : 32;
-Line 2302 
 namespace {
+Line 3032 
 namespace {
              memset(_3lnk->LoadChunkData(), 0, _3lnkChunkSize);
              // move 3prg to last position
-             pCkRegion->MoveSubChunk(pCkRegion->GetSubList(LIST_TYPE_3PRG), 0);
+             pCkRegion->MoveSubChunk(pCkRegion->GetSubList(LIST_TYPE_3PRG), (RIFF::Chunk*)NULL);
          }
          // update dimension definitions in '3lnk' chunk
-Line 2346 
 namespace {
+Line 3076 
 namespace {
              RIFF::List* _3ewl = _3prg->GetFirstSubList();
              while (_3ewl) {
                  if (_3ewl->GetListType() == LIST_TYPE_3EWL) {
-                     pDimensionRegions[dimensionRegionNr] = new DimensionRegion(_3ewl);
+                     pDimensionRegions[dimensionRegionNr] = new DimensionRegion(this, _3ewl);
                      dimensionRegionNr++;
                  }
                  _3ewl = _3prg->GetNextSubList();
-Line 2355 
 namespace {
+Line 3085 
 namespace {
          }
      }
+     void Region::SetKeyRange(uint16_t Low, uint16_t High) {
+         // update KeyRange struct and make sure regions are in correct order
+         DLS::Region::SetKeyRange(Low, High);
+         // update Region key table for fast lookup
+         ((gig::Instrument*)GetParent())->UpdateRegionKeyTable();
+     }
      void Region::UpdateVelocityTable() {
          // get velocity dimension's index
          int veldim = -1;
-Line 2441 
 namespace {
+Line 3178 
 namespace {
       *                        dimension bits limit is violated
       */
      void Region::AddDimension(dimension_def_t* pDimDef) {
+         // some initial sanity checks of the given dimension definition
+         if (pDimDef->zones < 2)
+             throw gig::Exception("Could not add new dimension, amount of requested zones must always be at least two");
+         if (pDimDef->bits < 1)
+             throw gig::Exception("Could not add new dimension, amount of requested requested zone bits must always be at least one");
+         if (pDimDef->dimension == dimension_samplechannel) {
+             if (pDimDef->zones != 2)
+                 throw gig::Exception("Could not add new 'sample channel' dimensions, the requested amount of zones must always be 2 for this dimension type");
+             if (pDimDef->bits != 1)
+                 throw gig::Exception("Could not add new 'sample channel' dimensions, the requested amount of zone bits must always be 1 for this dimension type");
+         }
          // check if max. amount of dimensions reached
          File* file = (File*) GetParent()->GetParent();
          const int iMaxDimensions = (file->pVersion && file->pVersion->major == 3) ? 8 : 5;
-Line 2460 
 namespace {
+Line 3209 
 namespace {
              if (pDimensionDefinitions[i].dimension == pDimDef->dimension)
                  throw gig::Exception("Could not add new dimension, there is already a dimension of the same type");
+         // pos is where the new dimension should be placed, normally
+         // last in list, except for the samplechannel dimension which
+         // has to be first in list
+         int pos = pDimDef->dimension == dimension_samplechannel ? 0 : Dimensions;
+         int bitpos = 0;
+         for (int i = 0 ; i < pos ; i++)
+             bitpos += pDimensionDefinitions[i].bits;
+         // make room for the new dimension
+         for (int i = Dimensions ; i > pos ; i--) pDimensionDefinitions[i] = pDimensionDefinitions[i - 1];
+         for (int i = 0 ; i < (1 << iCurrentBits) ; i++) {
+             for (int j = Dimensions ; j > pos ; j--) {
+                 pDimensionRegions[i]->DimensionUpperLimits[j] =
+                     pDimensionRegions[i]->DimensionUpperLimits[j - 1];
+             }
+         }
          // assign definition of new dimension
-         pDimensionDefinitions[Dimensions] = *pDimDef;
+         pDimensionDefinitions[pos] = *pDimDef;
          // auto correct certain dimension definition fields (where possible)
-         pDimensionDefinitions[Dimensions].split_type  =
+         pDimensionDefinitions[pos].split_type  =
-             __resolveSplitType(pDimensionDefinitions[Dimensions].dimension);
+             __resolveSplitType(pDimensionDefinitions[pos].dimension);
-         pDimensionDefinitions[Dimensions].zone_size =
+         pDimensionDefinitions[pos].zone_size =
-             __resolveZoneSize(pDimensionDefinitions[Dimensions]);
+             __resolveZoneSize(pDimensionDefinitions[pos]);
-         // create new dimension region(s) for this new dimension
+         // create new dimension region(s) for this new dimension, and make
-         for (int i = 1 << iCurrentBits; i < 1 << iNewBits; i++) {
+         // sure that the dimension regions are placed correctly in both the
-             //TODO: maybe we should copy existing dimension regions if possible instead of simply creating new ones with default values
+         // RIFF list and the pDimensionRegions array
-             RIFF::List* _3prg = pCkRegion->GetSubList(LIST_TYPE_3PRG);
+         RIFF::Chunk* moveTo = NULL;
-             RIFF::List* pNewDimRgnListChunk = _3prg->AddSubList(LIST_TYPE_3EWL);
+         RIFF::List* _3prg = pCkRegion->GetSubList(LIST_TYPE_3PRG);
-             pDimensionRegions[i] = new DimensionRegion(pNewDimRgnListChunk);
+         for (int i = (1 << iCurrentBits) - (1 << bitpos) ; i >= 0 ; i -= (1 << bitpos)) {
+             for (int k = 0 ; k < (1 << bitpos) ; k++) {
-             // copy the upper limits for the other dimensions
+                 pDimensionRegions[(i << pDimDef->bits) + k] = pDimensionRegions[i + k];
-             memcpy(pDimensionRegions[i]->DimensionUpperLimits,
+             }
-                    pDimensionRegions[i & ((1 << iCurrentBits) - 1)]->DimensionUpperLimits, 8);
+             for (int j = 1 ; j < (1 << pDimDef->bits) ; j++) {
+                 for (int k = 0 ; k < (1 << bitpos) ; k++) {
+                     RIFF::List* pNewDimRgnListChunk = _3prg->AddSubList(LIST_TYPE_3EWL);
+                     if (moveTo) _3prg->MoveSubChunk(pNewDimRgnListChunk, moveTo);
+                     // create a new dimension region and copy all parameter values from
+                     // an existing dimension region
+                     pDimensionRegions[(i << pDimDef->bits) + (j << bitpos) + k] =
+                         new DimensionRegion(pNewDimRgnListChunk, *pDimensionRegions[i + k]);
-             DimensionRegions++;
+                     DimensionRegions++;
+                 }
+             }
+             moveTo = pDimensionRegions[i]->pParentList;
          }
          // initialize the upper limits for this dimension
-         for (int z = 0, j = 0 ; z < pDimDef->zones ; z++, j += 1 << iCurrentBits) {
+         int mask = (1 << bitpos) - 1;
+         for (int z = 0 ; z < pDimDef->zones ; z++) {
              uint8_t upperLimit = uint8_t((z + 1) * 128.0 / pDimDef->zones - 1);
              for (int i = 0 ; i < 1 << iCurrentBits ; i++) {
-                 pDimensionRegions[j + i]->DimensionUpperLimits[Dimensions] = upperLimit;
+                 pDimensionRegions[((i & ~mask) << pDimDef->bits) |
+                                   (z << bitpos) |
+                                   (i & mask)]->DimensionUpperLimits[pos] = upperLimit;
              }
          }
-Line 2586 
 namespace {
+Line 3365 
 namespace {
          if (pDimDef->dimension == dimension_layer) Layers = 1;
      }
+     /** @brief Delete one split zone of a dimension (decrement zone amount).
+      *
+      * Instead of deleting an entire dimensions, this method will only delete
+      * one particular split zone given by @a zone of the Region's dimension
+      * given by @a type. So this method will simply decrement the amount of
+      * zones by one of the dimension in question. To be able to do that, the
+      * respective dimension must exist on this Region and it must have at least
+      * 3 zones. All DimensionRegion objects associated with the zone will be
+      * deleted.
+      *
+      * @param type - identifies the dimension where a zone shall be deleted
+      * @param zone - index of the dimension split zone that shall be deleted
+      * @throws gig::Exception if requested zone could not be deleted
+      */
+     void Region::DeleteDimensionZone(dimension_t type, int zone) {
+         dimension_def_t* oldDef = GetDimensionDefinition(type);
+         if (!oldDef)
+             throw gig::Exception("Could not delete dimension zone, no such dimension of given type");
+         if (oldDef->zones <= 2)
+             throw gig::Exception("Could not delete dimension zone, because it would end up with only one zone.");
+         if (zone < 0 || zone >= oldDef->zones)
+             throw gig::Exception("Could not delete dimension zone, requested zone index out of bounds.");
+         const int newZoneSize = oldDef->zones - 1;
+         // create a temporary Region which just acts as a temporary copy
+         // container and will be deleted at the end of this function and will
+         // also not be visible through the API during this process
+         gig::Region* tempRgn = NULL;
+         {
+             // adding these temporary chunks is probably not even necessary
+             Instrument* instr = static_cast<Instrument*>(GetParent());
+             RIFF::List* pCkInstrument = instr->pCkInstrument;
+             RIFF::List* lrgn = pCkInstrument->GetSubList(LIST_TYPE_LRGN);
+             if (!lrgn)  lrgn = pCkInstrument->AddSubList(LIST_TYPE_LRGN);
+             RIFF::List* rgn = lrgn->AddSubList(LIST_TYPE_RGN);
+             tempRgn = new Region(instr, rgn);
+         }
+         // copy this region's dimensions (with already the dimension split size
+         // requested by the arguments of this method call) to the temporary
+         // region, and don't use Region::CopyAssign() here for this task, since
+         // it would also alter fast lookup helper variables here and there
+         dimension_def_t newDef;
+         for (int i = 0; i < Dimensions; ++i) {
+             dimension_def_t def = pDimensionDefinitions[i]; // copy, don't reference
+             // is this the dimension requested by the method arguments? ...
+             if (def.dimension == type) { // ... if yes, decrement zone amount by one
+                 def.zones = newZoneSize;
+                 if ((1 << (def.bits - 1)) == def.zones) def.bits--;
+                 newDef = def;
+             }
+             tempRgn->AddDimension(&def);
+         }
+         // find the dimension index in the tempRegion which is the dimension
+         // type passed to this method (paranoidly expecting different order)
+         int tempReducedDimensionIndex = -1;
+         for (int d = 0; d < tempRgn->Dimensions; ++d) {
+             if (tempRgn->pDimensionDefinitions[d].dimension == type) {
+                 tempReducedDimensionIndex = d;
+                 break;
+             }
+         }
+         // copy dimension regions from this region to the temporary region
+         for (int iDst = 0; iDst < 256; ++iDst) {
+             DimensionRegion* dstDimRgn = tempRgn->pDimensionRegions[iDst];
+             if (!dstDimRgn) continue;
+             std::map<dimension_t,int> dimCase;
+             bool isValidZone = true;
+             for (int d = 0, baseBits = 0; d < tempRgn->Dimensions; ++d) {
+                 const int dstBits = tempRgn->pDimensionDefinitions[d].bits;
+                 dimCase[tempRgn->pDimensionDefinitions[d].dimension] =
+                     (iDst >> baseBits) & ((1 << dstBits) - 1);
+                 baseBits += dstBits;
+                 // there are also DimensionRegion objects of unused zones, skip them
+                 if (dimCase[tempRgn->pDimensionDefinitions[d].dimension] >= tempRgn->pDimensionDefinitions[d].zones) {
+                     isValidZone = false;
+                     break;
+                 }
+             }
+             if (!isValidZone) continue;
+             // a bit paranoid: cope with the chance that the dimensions would
+             // have different order in source and destination regions
+             const bool isLastZone = (dimCase[type] == newZoneSize - 1);
+             if (dimCase[type] >= zone) dimCase[type]++;
+             DimensionRegion* srcDimRgn = GetDimensionRegionByBit(dimCase);
+             dstDimRgn->CopyAssign(srcDimRgn);
+             // if this is the upper most zone of the dimension passed to this
+             // method, then correct (raise) its upper limit to 127
+             if (newDef.split_type == split_type_normal && isLastZone)
+                 dstDimRgn->DimensionUpperLimits[tempReducedDimensionIndex] = 127;
+         }
+         // now tempRegion's dimensions and DimensionRegions basically reflect
+         // what we wanted to get for this actual Region here, so we now just
+         // delete and recreate the dimension in question with the new amount
+         // zones and then copy back from tempRegion
+         DeleteDimension(oldDef);
+         AddDimension(&newDef);
+         for (int iSrc = 0; iSrc < 256; ++iSrc) {
+             DimensionRegion* srcDimRgn = tempRgn->pDimensionRegions[iSrc];
+             if (!srcDimRgn) continue;
+             std::map<dimension_t,int> dimCase;
+             for (int d = 0, baseBits = 0; d < tempRgn->Dimensions; ++d) {
+                 const int srcBits = tempRgn->pDimensionDefinitions[d].bits;
+                 dimCase[tempRgn->pDimensionDefinitions[d].dimension] =
+                     (iSrc >> baseBits) & ((1 << srcBits) - 1);
+                 baseBits += srcBits;
+             }
+             // a bit paranoid: cope with the chance that the dimensions would
+             // have different order in source and destination regions
+             DimensionRegion* dstDimRgn = GetDimensionRegionByBit(dimCase);
+             if (!dstDimRgn) continue;
+             dstDimRgn->CopyAssign(srcDimRgn);
+         }
+         // delete temporary region
+         delete tempRgn;
+         UpdateVelocityTable();
+     }
+     /** @brief Divide split zone of a dimension in two (increment zone amount).
+      *
+      * This will increment the amount of zones for the dimension (given by
+      * @a type) by one. It will do so by dividing the zone (given by @a zone)
+      * in the middle of its zone range in two. So the two zones resulting from
+      * the zone being splitted, will be an equivalent copy regarding all their
+      * articulation informations and sample reference. The two zones will only
+      * differ in their zone's upper limit
+      * (DimensionRegion::DimensionUpperLimits).
+      *
+      * @param type - identifies the dimension where a zone shall be splitted
+      * @param zone - index of the dimension split zone that shall be splitted
+      * @throws gig::Exception if requested zone could not be splitted
+      */
+     void Region::SplitDimensionZone(dimension_t type, int zone) {
+         dimension_def_t* oldDef = GetDimensionDefinition(type);
+         if (!oldDef)
+             throw gig::Exception("Could not split dimension zone, no such dimension of given type");
+         if (zone < 0 || zone >= oldDef->zones)
+             throw gig::Exception("Could not split dimension zone, requested zone index out of bounds.");
+         const int newZoneSize = oldDef->zones + 1;
+         // create a temporary Region which just acts as a temporary copy
+         // container and will be deleted at the end of this function and will
+         // also not be visible through the API during this process
+         gig::Region* tempRgn = NULL;
+         {
+             // adding these temporary chunks is probably not even necessary
+             Instrument* instr = static_cast<Instrument*>(GetParent());
+             RIFF::List* pCkInstrument = instr->pCkInstrument;
+             RIFF::List* lrgn = pCkInstrument->GetSubList(LIST_TYPE_LRGN);
+             if (!lrgn)  lrgn = pCkInstrument->AddSubList(LIST_TYPE_LRGN);
+             RIFF::List* rgn = lrgn->AddSubList(LIST_TYPE_RGN);
+             tempRgn = new Region(instr, rgn);
+         }
+         // copy this region's dimensions (with already the dimension split size
+         // requested by the arguments of this method call) to the temporary
+         // region, and don't use Region::CopyAssign() here for this task, since
+         // it would also alter fast lookup helper variables here and there
+         dimension_def_t newDef;
+         for (int i = 0; i < Dimensions; ++i) {
+             dimension_def_t def = pDimensionDefinitions[i]; // copy, don't reference
+             // is this the dimension requested by the method arguments? ...
+             if (def.dimension == type) { // ... if yes, increment zone amount by one
+                 def.zones = newZoneSize;
+                 if ((1 << oldDef->bits) < newZoneSize) def.bits++;
+                 newDef = def;
+             }
+             tempRgn->AddDimension(&def);
+         }
+         // find the dimension index in the tempRegion which is the dimension
+         // type passed to this method (paranoidly expecting different order)
+         int tempIncreasedDimensionIndex = -1;
+         for (int d = 0; d < tempRgn->Dimensions; ++d) {
+             if (tempRgn->pDimensionDefinitions[d].dimension == type) {
+                 tempIncreasedDimensionIndex = d;
+                 break;
+             }
+         }
+         // copy dimension regions from this region to the temporary region
+         for (int iSrc = 0; iSrc < 256; ++iSrc) {
+             DimensionRegion* srcDimRgn = pDimensionRegions[iSrc];
+             if (!srcDimRgn) continue;
+             std::map<dimension_t,int> dimCase;
+             bool isValidZone = true;
+             for (int d = 0, baseBits = 0; d < Dimensions; ++d) {
+                 const int srcBits = pDimensionDefinitions[d].bits;
+                 dimCase[pDimensionDefinitions[d].dimension] =
+                     (iSrc >> baseBits) & ((1 << srcBits) - 1);
+                 // there are also DimensionRegion objects for unused zones, skip them
+                 if (dimCase[pDimensionDefinitions[d].dimension] >= pDimensionDefinitions[d].zones) {
+                     isValidZone = false;
+                     break;
+                 }
+                 baseBits += srcBits;
+             }
+             if (!isValidZone) continue;
+             // a bit paranoid: cope with the chance that the dimensions would
+             // have different order in source and destination regions
+             if (dimCase[type] > zone) dimCase[type]++;
+             DimensionRegion* dstDimRgn = tempRgn->GetDimensionRegionByBit(dimCase);
+             dstDimRgn->CopyAssign(srcDimRgn);
+             // if this is the requested zone to be splitted, then also copy
+             // the source DimensionRegion to the newly created target zone
+             // and set the old zones upper limit lower
+             if (dimCase[type] == zone) {
+                 // lower old zones upper limit
+                 if (newDef.split_type == split_type_normal) {
+                     const int high =
+                         dstDimRgn->DimensionUpperLimits[tempIncreasedDimensionIndex];
+                     int low = 0;
+                     if (zone > 0) {
+                         std::map<dimension_t,int> lowerCase = dimCase;
+                         lowerCase[type]--;
+                         DimensionRegion* dstDimRgnLow = tempRgn->GetDimensionRegionByBit(lowerCase);
+                         low = dstDimRgnLow->DimensionUpperLimits[tempIncreasedDimensionIndex];
+                     }
+                     dstDimRgn->DimensionUpperLimits[tempIncreasedDimensionIndex] = low + (high - low) / 2;
+                 }
+                 // fill the newly created zone of the divided zone as well
+                 dimCase[type]++;
+                 dstDimRgn = tempRgn->GetDimensionRegionByBit(dimCase);
+                 dstDimRgn->CopyAssign(srcDimRgn);
+             }
+         }
+         // now tempRegion's dimensions and DimensionRegions basically reflect
+         // what we wanted to get for this actual Region here, so we now just
+         // delete and recreate the dimension in question with the new amount
+         // zones and then copy back from tempRegion
+         DeleteDimension(oldDef);
+         AddDimension(&newDef);
+         for (int iSrc = 0; iSrc < 256; ++iSrc) {
+             DimensionRegion* srcDimRgn = tempRgn->pDimensionRegions[iSrc];
+             if (!srcDimRgn) continue;
+             std::map<dimension_t,int> dimCase;
+             for (int d = 0, baseBits = 0; d < tempRgn->Dimensions; ++d) {
+                 const int srcBits = tempRgn->pDimensionDefinitions[d].bits;
+                 dimCase[tempRgn->pDimensionDefinitions[d].dimension] =
+                     (iSrc >> baseBits) & ((1 << srcBits) - 1);
+                 baseBits += srcBits;
+             }
+             // a bit paranoid: cope with the chance that the dimensions would
+             // have different order in source and destination regions
+             DimensionRegion* dstDimRgn = GetDimensionRegionByBit(dimCase);
+             if (!dstDimRgn) continue;
+             dstDimRgn->CopyAssign(srcDimRgn);
+         }
+         // delete temporary region
+         delete tempRgn;
+         UpdateVelocityTable();
+     }
+     /** @brief Change type of an existing dimension.
+      *
+      * Alters the dimension type of a dimension already existing on this
+      * region. If there is currently no dimension on this Region with type
+      * @a oldType, then this call with throw an Exception. Likewise there are
+      * cases where the requested dimension type cannot be performed. For example
+      * if the new dimension type shall be gig::dimension_samplechannel, and the
+      * current dimension has more than 2 zones. In such cases an Exception is
+      * thrown as well.
+      *
+      * @param oldType - identifies the existing dimension to be changed
+      * @param newType - to which dimension type it should be changed to
+      * @throws gig::Exception if requested change cannot be performed
+      */
+     void Region::SetDimensionType(dimension_t oldType, dimension_t newType) {
+         if (oldType == newType) return;
+         dimension_def_t* def = GetDimensionDefinition(oldType);
+         if (!def)
+             throw gig::Exception("No dimension with provided old dimension type exists on this region");
+         if (newType == dimension_samplechannel && def->zones != 2)
+             throw gig::Exception("Cannot change to dimension type 'sample channel', because existing dimension does not have 2 zones");
+         if (GetDimensionDefinition(newType))
+             throw gig::Exception("There is already a dimension with requested new dimension type on this region");
+         def->dimension  = newType;
+         def->split_type = __resolveSplitType(newType);
+     }
+     DimensionRegion* Region::GetDimensionRegionByBit(const std::map<dimension_t,int>& DimCase) {
+         uint8_t bits[8] = {};
+         for (std::map<dimension_t,int>::const_iterator it = DimCase.begin();
+              it != DimCase.end(); ++it)
+         {
+             for (int d = 0; d < Dimensions; ++d) {
+                 if (pDimensionDefinitions[d].dimension == it->first) {
+                     bits[d] = it->second;
+                     goto nextDimCaseSlice;
+                 }
+             }
+             assert(false); // do crash ... too harsh maybe ? ignore it instead ?
+             nextDimCaseSlice:
+             ; // noop
+         }
+         return GetDimensionRegionByBit(bits);
+     }
+     /**
+      * Searches in the current Region for a dimension of the given dimension
+      * type and returns the precise configuration of that dimension in this
+      * Region.
+      *
+      * @param type - dimension type of the sought dimension
+      * @returns dimension definition or NULL if there is no dimension with
+      *          sought type in this Region.
+      */
+     dimension_def_t* Region::GetDimensionDefinition(dimension_t type) {
+         for (int i = 0; i < Dimensions; ++i)
+             if (pDimensionDefinitions[i].dimension == type)
+                 return &pDimensionDefinitions[i];
+         return NULL;
+     }
      Region::~Region() {
          for (int i = 0; i < 256; i++) {
              if (pDimensionRegions[i]) delete pDimensionRegions[i];
-Line 2643 
 namespace {
+Line 3746 
 namespace {
              }
              bitpos += pDimensionDefinitions[i].bits;
          }
-         DimensionRegion* dimreg = pDimensionRegions[dimregidx];
+         DimensionRegion* dimreg = pDimensionRegions[dimregidx & 255];
+         if (!dimreg) return NULL;
          if (veldim != -1) {
              // (dimreg is now the dimension region for the lowest velocity)
              if (dimreg->VelocityTable) // custom defined zone ranges
-                 bits = dimreg->VelocityTable[DimValues[veldim]];
+                 bits = dimreg->VelocityTable[DimValues[veldim] & 127];
              else // normal split type
-                 bits = uint8_t(DimValues[veldim] / pDimensionDefinitions[veldim].zone_size);
+                 bits = uint8_t((DimValues[veldim] & 127) / pDimensionDefinitions[veldim].zone_size);
-             dimregidx |= bits << velbitpos;
+             const uint8_t limiter_mask = (1 << pDimensionDefinitions[veldim].bits) - 1;
-             dimreg = pDimensionRegions[dimregidx];
+             dimregidx |= (bits & limiter_mask) << velbitpos;
+             dimreg = pDimensionRegions[dimregidx & 255];
          }
          return dimreg;
      }
+     int Region::GetDimensionRegionIndexByValue(const uint DimValues[8]) {
+         uint8_t bits;
+         int veldim = -1;
+         int velbitpos;
+         int bitpos = 0;
+         int dimregidx = 0;
+         for (uint i = 0; i < Dimensions; i++) {
+             if (pDimensionDefinitions[i].dimension == dimension_velocity) {
+                 // the velocity dimension must be handled after the other dimensions
+                 veldim = i;
+                 velbitpos = bitpos;
+             } else {
+                 switch (pDimensionDefinitions[i].split_type) {
+                     case split_type_normal:
+                         if (pDimensionRegions[0]->DimensionUpperLimits[i]) {
+                             // gig3: all normal dimensions (not just the velocity dimension) have custom zone ranges
+                             for (bits = 0 ; bits < pDimensionDefinitions[i].zones ; bits++) {
+                                 if (DimValues[i] <= pDimensionRegions[bits << bitpos]->DimensionUpperLimits[i]) break;
+                             }
+                         } else {
+                             // gig2: evenly sized zones
+                             bits = uint8_t(DimValues[i] / pDimensionDefinitions[i].zone_size);
+                         }
+                         break;
+                     case split_type_bit: // the value is already the sought dimension bit number
+                         const uint8_t limiter_mask = (0xff << pDimensionDefinitions[i].bits) ^ 0xff;
+                         bits = DimValues[i] & limiter_mask; // just make sure the value doesn't use more bits than allowed
+                         break;
+                 }
+                 dimregidx |= bits << bitpos;
+             }
+             bitpos += pDimensionDefinitions[i].bits;
+         }
+         dimregidx &= 255;
+         DimensionRegion* dimreg = pDimensionRegions[dimregidx];
+         if (!dimreg) return -1;
+         if (veldim != -1) {
+             // (dimreg is now the dimension region for the lowest velocity)
+             if (dimreg->VelocityTable) // custom defined zone ranges
+                 bits = dimreg->VelocityTable[DimValues[veldim] & 127];
+             else // normal split type
+                 bits = uint8_t((DimValues[veldim] & 127) / pDimensionDefinitions[veldim].zone_size);
+             const uint8_t limiter_mask = (1 << pDimensionDefinitions[veldim].bits) - 1;
+             dimregidx |= (bits & limiter_mask) << velbitpos;
+             dimregidx &= 255;
+         }
+         return dimregidx;
+     }
      /**
       * Returns the appropriate DimensionRegion for the given dimension bit
       * numbers (zone index). You usually use <i>GetDimensionRegionByValue</i>
-Line 2695 
 namespace {
+Line 3850 
 namespace {
          if ((int32_t)WavePoolTableIndex == -1) return NULL;
          File* file = (File*) GetParent()->GetParent();
          if (!file->pWavePoolTable) return NULL;
-         unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex];
+         // for new files or files >= 2 GB use 64 bit wave pool offsets
-         unsigned long soughtfileno = file->pWavePoolTableHi[WavePoolTableIndex];
+         if (file->pRIFF->IsNew() || (file->pRIFF->GetCurrentFileSize() >> 31)) {
-         Sample* sample = file->GetFirstSample(pProgress);
+             // use 64 bit wave pool offsets (treating this as large file)
-         while (sample) {
+             uint64_t soughtoffset =
-             if (sample->ulWavePoolOffset == soughtoffset &&
+                 uint64_t(file->pWavePoolTable[WavePoolTableIndex]) |
-                 sample->FileNo == soughtfileno) return static_cast<gig::Sample*>(sample);
+                 uint64_t(file->pWavePoolTableHi[WavePoolTableIndex]) << 32;
-             sample = file->GetNextSample();
+             Sample* sample = file->GetFirstSample(pProgress);
+             while (sample) {
+                 if (sample->ullWavePoolOffset == soughtoffset)
+                     return static_cast<gig::Sample*>(sample);
+                 sample = file->GetNextSample();
+             }
+         } else {
+             // use extension files and 32 bit wave pool offsets
+             file_offset_t soughtoffset = file->pWavePoolTable[WavePoolTableIndex];
+             file_offset_t soughtfileno = file->pWavePoolTableHi[WavePoolTableIndex];
+             Sample* sample = file->GetFirstSample(pProgress);
+             while (sample) {
+                 if (sample->ullWavePoolOffset == soughtoffset &&
+                     sample->FileNo == soughtfileno) return static_cast<gig::Sample*>(sample);
+                 sample = file->GetNextSample();
+             }
          }
          return NULL;
      }
+     /**
+      * Make a (semi) deep copy of the Region object given by @a orig
+      * and assign it to this object.
+      *
+      * Note that all sample pointers referenced by @a orig are simply copied as
+      * memory address. Thus the respective samples are shared, not duplicated!
+      *
+      * @param orig - original Region object to be copied from
+      */
+     void Region::CopyAssign(const Region* orig) {
+         CopyAssign(orig, NULL);
+     }
+     /**
+      * Make a (semi) deep copy of the Region object given by @a orig and
+      * assign it to this object
+      *
+      * @param mSamples - crosslink map between the foreign file's samples and
+      *                   this file's samples
+      */
+     void Region::CopyAssign(const Region* orig, const std::map<Sample*,Sample*>* mSamples) {
+         // handle base classes
+         DLS::Region::CopyAssign(orig);
+         if (mSamples && mSamples->count((gig::Sample*)orig->pSample)) {
+             pSample = mSamples->find((gig::Sample*)orig->pSample)->second;
+         }
+         // handle own member variables
+         for (int i = Dimensions - 1; i >= 0; --i) {
+             DeleteDimension(&pDimensionDefinitions[i]);
+         }
+         Layers = 0; // just to be sure
+         for (int i = 0; i < orig->Dimensions; i++) {
+             // we need to copy the dim definition here, to avoid the compiler
+             // complaining about const-ness issue
+             dimension_def_t def = orig->pDimensionDefinitions[i];
+             AddDimension(&def);
+         }
+         for (int i = 0; i < 256; i++) {
+             if (pDimensionRegions[i] && orig->pDimensionRegions[i]) {
+                 pDimensionRegions[i]->CopyAssign(
+                     orig->pDimensionRegions[i],
+                     mSamples
+                 );
+             }
+         }
+         Layers = orig->Layers;
+     }
+ // *************** MidiRule ***************
+ // *
+     MidiRuleCtrlTrigger::MidiRuleCtrlTrigger(RIFF::Chunk* _3ewg) {
+         _3ewg->SetPos(36);
+         Triggers = _3ewg->ReadUint8();
+         _3ewg->SetPos(40);
+         ControllerNumber = _3ewg->ReadUint8();
+         _3ewg->SetPos(46);
+         for (int i = 0 ; i < Triggers ; i++) {
+             pTriggers[i].TriggerPoint = _3ewg->ReadUint8();
+             pTriggers[i].Descending = _3ewg->ReadUint8();
+             pTriggers[i].VelSensitivity = _3ewg->ReadUint8();
+             pTriggers[i].Key = _3ewg->ReadUint8();
+             pTriggers[i].NoteOff = _3ewg->ReadUint8();
+             pTriggers[i].Velocity = _3ewg->ReadUint8();
+             pTriggers[i].OverridePedal = _3ewg->ReadUint8();
+             _3ewg->ReadUint8();
+         }
+     }
+     MidiRuleCtrlTrigger::MidiRuleCtrlTrigger() :
+         ControllerNumber(0),
+         Triggers(0) {
+     }
+     void MidiRuleCtrlTrigger::UpdateChunks(uint8_t* pData) const {
+         pData[32] = 4;
+         pData[33] = 16;
+         pData[36] = Triggers;
+         pData[40] = ControllerNumber;
+         for (int i = 0 ; i < Triggers ; i++) {
+             pData[46 + i * 8] = pTriggers[i].TriggerPoint;
+             pData[47 + i * 8] = pTriggers[i].Descending;
+             pData[48 + i * 8] = pTriggers[i].VelSensitivity;
+             pData[49 + i * 8] = pTriggers[i].Key;
+             pData[50 + i * 8] = pTriggers[i].NoteOff;
+             pData[51 + i * 8] = pTriggers[i].Velocity;
+             pData[52 + i * 8] = pTriggers[i].OverridePedal;
+         }
+     }
+     MidiRuleLegato::MidiRuleLegato(RIFF::Chunk* _3ewg) {
+         _3ewg->SetPos(36);
+         LegatoSamples = _3ewg->ReadUint8(); // always 12
+         _3ewg->SetPos(40);
+         BypassUseController = _3ewg->ReadUint8();
+         BypassKey = _3ewg->ReadUint8();
+         BypassController = _3ewg->ReadUint8();
+         ThresholdTime = _3ewg->ReadUint16();
+         _3ewg->ReadInt16();
+         ReleaseTime = _3ewg->ReadUint16();
+         _3ewg->ReadInt16();
+         KeyRange.low = _3ewg->ReadUint8();
+         KeyRange.high = _3ewg->ReadUint8();
+         _3ewg->SetPos(64);
+         ReleaseTriggerKey = _3ewg->ReadUint8();
+         AltSustain1Key = _3ewg->ReadUint8();
+         AltSustain2Key = _3ewg->ReadUint8();
+     }
+     MidiRuleLegato::MidiRuleLegato() :
+         LegatoSamples(12),
+         BypassUseController(false),
+         BypassKey(0),
+         BypassController(1),
+         ThresholdTime(20),
+         ReleaseTime(20),
+         ReleaseTriggerKey(0),
+         AltSustain1Key(0),
+         AltSustain2Key(0)
+     {
+         KeyRange.low = KeyRange.high = 0;
+     }
+     void MidiRuleLegato::UpdateChunks(uint8_t* pData) const {
+         pData[32] = 0;
+         pData[33] = 16;
+         pData[36] = LegatoSamples;
+         pData[40] = BypassUseController;
+         pData[41] = BypassKey;
+         pData[42] = BypassController;
+         store16(&pData[43], ThresholdTime);
+         store16(&pData[47], ReleaseTime);
+         pData[51] = KeyRange.low;
+         pData[52] = KeyRange.high;
+         pData[64] = ReleaseTriggerKey;
+         pData[65] = AltSustain1Key;
+         pData[66] = AltSustain2Key;
+     }
+     MidiRuleAlternator::MidiRuleAlternator(RIFF::Chunk* _3ewg) {
+         _3ewg->SetPos(36);
+         Articulations = _3ewg->ReadUint8();
+         int flags = _3ewg->ReadUint8();
+         Polyphonic = flags & 8;
+         Chained = flags & 4;
+         Selector = (flags & 2) ? selector_controller :
+             (flags & 1) ? selector_key_switch : selector_none;
+         Patterns = _3ewg->ReadUint8();
+         _3ewg->ReadUint8(); // chosen row
+         _3ewg->ReadUint8(); // unknown
+         _3ewg->ReadUint8(); // unknown
+         _3ewg->ReadUint8(); // unknown
+         KeySwitchRange.low = _3ewg->ReadUint8();
+         KeySwitchRange.high = _3ewg->ReadUint8();
+         Controller = _3ewg->ReadUint8();
+         PlayRange.low = _3ewg->ReadUint8();
+         PlayRange.high = _3ewg->ReadUint8();
+         int n = std::min(int(Articulations), 32);
+         for (int i = 0 ; i < n ; i++) {
+             _3ewg->ReadString(pArticulations[i], 32);
+         }
+         _3ewg->SetPos(1072);
+         n = std::min(int(Patterns), 32);
+         for (int i = 0 ; i < n ; i++) {
+             _3ewg->ReadString(pPatterns[i].Name, 16);
+             pPatterns[i].Size = _3ewg->ReadUint8();
+             _3ewg->Read(&pPatterns[i][0], 1, 32);
+         }
+     }
+     MidiRuleAlternator::MidiRuleAlternator() :
+         Articulations(0),
+         Patterns(0),
+         Selector(selector_none),
+         Controller(0),
+         Polyphonic(false),
+         Chained(false)
+     {
+         PlayRange.low = PlayRange.high = 0;
+         KeySwitchRange.low = KeySwitchRange.high = 0;
+     }
+     void MidiRuleAlternator::UpdateChunks(uint8_t* pData) const {
+         pData[32] = 3;
+         pData[33] = 16;
+         pData[36] = Articulations;
+         pData[37] = (Polyphonic ? 8 : 0) | (Chained ? 4 : 0) |
+             (Selector == selector_controller ? 2 :
+              (Selector == selector_key_switch ? 1 : 0));
+         pData[38] = Patterns;
+         pData[43] = KeySwitchRange.low;
+         pData[44] = KeySwitchRange.high;
+         pData[45] = Controller;
+         pData[46] = PlayRange.low;
+         pData[47] = PlayRange.high;
+         char* str = reinterpret_cast<char*>(pData);
+         int pos = 48;
+         int n = std::min(int(Articulations), 32);
+         for (int i = 0 ; i < n ; i++, pos += 32) {
+             strncpy(&str[pos], pArticulations[i].c_str(), 32);
+         }
+         pos = 1072;
+         n = std::min(int(Patterns), 32);
+         for (int i = 0 ; i < n ; i++, pos += 49) {
+             strncpy(&str[pos], pPatterns[i].Name.c_str(), 16);
+             pData[pos + 16] = pPatterns[i].Size;
+             memcpy(&pData[pos + 16], &(pPatterns[i][0]), 32);
+         }
+     }
+ // *************** Script ***************
+ // *
+     Script::Script(ScriptGroup* group, RIFF::Chunk* ckScri) {
+         pGroup = group;
+         pChunk = ckScri;
+         if (ckScri) { // object is loaded from file ...
+             // read header
+             uint32_t headerSize = ckScri->ReadUint32();
+             Compression = (Compression_t) ckScri->ReadUint32();
+             Encoding    = (Encoding_t) ckScri->ReadUint32();
+             Language    = (Language_t) ckScri->ReadUint32();
+             Bypass      = (Language_t) ckScri->ReadUint32() & 1;
+             crc         = ckScri->ReadUint32();
+             uint32_t nameSize = ckScri->ReadUint32();
+             Name.resize(nameSize, ' ');
+             for (int i = 0; i < nameSize; ++i)
+                 Name[i] = ckScri->ReadUint8();
+             // to handle potential future extensions of the header
+             ckScri->SetPos(sizeof(int32_t) + headerSize);
+             // read actual script data
+             uint32_t scriptSize = ckScri->GetSize() - ckScri->GetPos();
+             data.resize(scriptSize);
+             for (int i = 0; i < scriptSize; ++i)
+                 data[i] = ckScri->ReadUint8();
+         } else { // this is a new script object, so just initialize it as such ...
+             Compression = COMPRESSION_NONE;
+             Encoding = ENCODING_ASCII;
+             Language = LANGUAGE_NKSP;
+             Bypass   = false;
+             crc      = 0;
+             Name     = "Unnamed Script";
+         }
+     }
+     Script::~Script() {
+     }
+     /**
+      * Returns the current script (i.e. as source code) in text format.
+      */
+     String Script::GetScriptAsText() {
+         String s;
+         s.resize(data.size(), ' ');
+         memcpy(&s[0], &data[0], data.size());
+         return s;
+     }
+     /**
+      * Replaces the current script with the new script source code text given
+      * by @a text.
+      *
+      * @param text - new script source code
+      */
+     void Script::SetScriptAsText(const String& text) {
+         data.resize(text.size());
+         memcpy(&data[0], &text[0], text.size());
+     }
+     /**
+      * Apply this script to the respective RIFF chunks. You have to call
+      * File::Save() to make changes persistent.
+      *
+      * Usually there is absolutely no need to call this method explicitly.
+      * It will be called automatically when File::Save() was called.
+      *
+      * @param pProgress - callback function for progress notification
+      */
+     void Script::UpdateChunks(progress_t* pProgress) {
+         // recalculate CRC32 check sum
+         __resetCRC(crc);
+         __calculateCRC(&data[0], data.size(), crc);
+         __encodeCRC(crc);
+         // make sure chunk exists and has the required size
+         const int chunkSize = 7*sizeof(int32_t) + Name.size() + data.size();
+         if (!pChunk) pChunk = pGroup->pList->AddSubChunk(CHUNK_ID_SCRI, chunkSize);
+         else pChunk->Resize(chunkSize);
+         // fill the chunk data to be written to disk
+         uint8_t* pData = (uint8_t*) pChunk->LoadChunkData();
+         int pos = 0;
+         store32(&pData[pos], 6*sizeof(int32_t) + Name.size()); // total header size
+         pos += sizeof(int32_t);
+         store32(&pData[pos], Compression);
+         pos += sizeof(int32_t);
+         store32(&pData[pos], Encoding);
+         pos += sizeof(int32_t);
+         store32(&pData[pos], Language);
+         pos += sizeof(int32_t);
+         store32(&pData[pos], Bypass ? 1 : 0);
+         pos += sizeof(int32_t);
+         store32(&pData[pos], crc);
+         pos += sizeof(int32_t);
+         store32(&pData[pos], Name.size());
+         pos += sizeof(int32_t);
+         for (int i = 0; i < Name.size(); ++i, ++pos)
+             pData[pos] = Name[i];
+         for (int i = 0; i < data.size(); ++i, ++pos)
+             pData[pos] = data[i];
+     }
+     /**
+      * Move this script from its current ScriptGroup to another ScriptGroup
+      * given by @a pGroup.
+      *
+      * @param pGroup - script's new group
+      */
+     void Script::SetGroup(ScriptGroup* pGroup) {
+         if (this->pGroup == pGroup) return;
+         if (pChunk)
+             pChunk->GetParent()->MoveSubChunk(pChunk, pGroup->pList);
+         this->pGroup = pGroup;
+     }
+     /**
+      * Returns the script group this script currently belongs to. Each script
+      * is a member of exactly one ScriptGroup.
+      *
+      * @returns current script group
+      */
+     ScriptGroup* Script::GetGroup() const {
+         return pGroup;
+     }
+     void Script::RemoveAllScriptReferences() {
+         File* pFile = pGroup->pFile;
+         for (int i = 0; pFile->GetInstrument(i); ++i) {
+             Instrument* instr = pFile->GetInstrument(i);
+             instr->RemoveScript(this);
+         }
+     }
+ // *************** ScriptGroup ***************
+ // *
+     ScriptGroup::ScriptGroup(File* file, RIFF::List* lstRTIS) {
+         pFile = file;
+         pList = lstRTIS;
+         pScripts = NULL;
+         if (lstRTIS) {
+             RIFF::Chunk* ckName = lstRTIS->GetSubChunk(CHUNK_ID_LSNM);
+             ::LoadString(ckName, Name);
+         } else {
+             Name = "Default Group";
+         }
+     }
+     ScriptGroup::~ScriptGroup() {
+         if (pScripts) {
+             std::list<Script*>::iterator iter = pScripts->begin();
+             std::list<Script*>::iterator end  = pScripts->end();
+             while (iter != end) {
+                 delete *iter;
+                 ++iter;
+             }
+             delete pScripts;
+         }
+     }
+     /**
+      * Apply this script group to the respective RIFF chunks. You have to call
+      * File::Save() to make changes persistent.
+      *
+      * Usually there is absolutely no need to call this method explicitly.
+      * It will be called automatically when File::Save() was called.
+      *
+      * @param pProgress - callback function for progress notification
+      */
+     void ScriptGroup::UpdateChunks(progress_t* pProgress) {
+         if (pScripts) {
+             if (!pList)
+                 pList = pFile->pRIFF->GetSubList(LIST_TYPE_3LS)->AddSubList(LIST_TYPE_RTIS);
+             // now store the name of this group as <LSNM> chunk as subchunk of the <RTIS> list chunk
+             ::SaveString(CHUNK_ID_LSNM, NULL, pList, Name, String("Unnamed Group"), true, 64);
+             for (std::list<Script*>::iterator it = pScripts->begin();
+                  it != pScripts->end(); ++it)
+             {
+                 (*it)->UpdateChunks(pProgress);
+             }
+         }
+     }
+     /** @brief Get instrument script.
+      *
+      * Returns the real-time instrument script with the given index.
+      *
+      * @param index - number of the sought script (0..n)
+      * @returns sought script or NULL if there's no such script
+      */
+     Script* ScriptGroup::GetScript(uint index) {
+         if (!pScripts) LoadScripts();
+         std::list<Script*>::iterator it = pScripts->begin();
+         for (uint i = 0; it != pScripts->end(); ++i, ++it)
+             if (i == index) return *it;
+         return NULL;
+     }
+     /** @brief Add new instrument script.
+      *
+      * Adds a new real-time instrument script to the file. The script is not
+      * actually used / executed unless it is referenced by an instrument to be
+      * used. This is similar to samples, which you can add to a file, without
+      * an instrument necessarily actually using it.
+      *
+      * You have to call Save() to make this persistent to the file.
+      *
+      * @return new empty script object
+      */
+     Script* ScriptGroup::AddScript() {
+         if (!pScripts) LoadScripts();
+         Script* pScript = new Script(this, NULL);
+         pScripts->push_back(pScript);
+         return pScript;
+     }
+     /** @brief Delete an instrument script.
+      *
+      * This will delete the given real-time instrument script. References of
+      * instruments that are using that script will be removed accordingly.
+      *
+      * You have to call Save() to make this persistent to the file.
+      *
+      * @param pScript - script to delete
+      * @throws gig::Exception if given script could not be found
+      */
+     void ScriptGroup::DeleteScript(Script* pScript) {
+         if (!pScripts) LoadScripts();
+         std::list<Script*>::iterator iter =
+             find(pScripts->begin(), pScripts->end(), pScript);
+         if (iter == pScripts->end())
+             throw gig::Exception("Could not delete script, could not find given script");
+         pScripts->erase(iter);
+         pScript->RemoveAllScriptReferences();
+         if (pScript->pChunk)
+             pScript->pChunk->GetParent()->DeleteSubChunk(pScript->pChunk);
+         delete pScript;
+     }
+     void ScriptGroup::LoadScripts() {
+         if (pScripts) return;
+         pScripts = new std::list<Script*>;
+         if (!pList) return;
+         for (RIFF::Chunk* ck = pList->GetFirstSubChunk(); ck;
+              ck = pList->GetNextSubChunk())
+         {
+             if (ck->GetChunkID() == CHUNK_ID_SCRI) {
+                 pScripts->push_back(new Script(this, ck));
+             }
+         }
+     }
  // *************** Instrument ***************
  // *
      Instrument::Instrument(File* pFile, RIFF::List* insList, progress_t* pProgress) : DLS::Instrument((DLS::File*)pFile, insList) {
-         static const DLS::Info::FixedStringLength fixedStringLengths[] = {
+         static const DLS::Info::string_length_t fixedStringLengths[] = {
              { CHUNK_ID_INAM, 64 },
              { CHUNK_ID_ISFT, 12 },
              { 0, 0 }
          };
-         pInfo->FixedStringLengths = fixedStringLengths;
+         pInfo->SetFixedStringLengths(fixedStringLengths);
          // Initialization
          for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;
-Line 2728 
 namespace {
+Line 4366 
 namespace {
          PianoReleaseMode = false;
          DimensionKeyRange.low = 0;
          DimensionKeyRange.high = 0;
+         pMidiRules = new MidiRule*[3];
+         pMidiRules[0] = NULL;
+         pScriptRefs = NULL;
          // Loading
          RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART);
-Line 2742 
 namespace {
+Line 4383 
 namespace {
                  PianoReleaseMode       = dimkeystart & 0x01;
                  DimensionKeyRange.low  = dimkeystart >> 1;
                  DimensionKeyRange.high = _3ewg->ReadUint8();
+                 if (_3ewg->GetSize() > 32) {
+                     // read MIDI rules
+                     int i = 0;
+                     _3ewg->SetPos(32);
+                     uint8_t id1 = _3ewg->ReadUint8();
+                     uint8_t id2 = _3ewg->ReadUint8();
+                     if (id2 == 16) {
+                         if (id1 == 4) {
+                             pMidiRules[i++] = new MidiRuleCtrlTrigger(_3ewg);
+                         } else if (id1 == 0) {
+                             pMidiRules[i++] = new MidiRuleLegato(_3ewg);
+                         } else if (id1 == 3) {
+                             pMidiRules[i++] = new MidiRuleAlternator(_3ewg);
+                         } else {
+                             pMidiRules[i++] = new MidiRuleUnknown;
+                         }
+                     }
+                     else if (id1 != 0 || id2 != 0) {
+                         pMidiRules[i++] = new MidiRuleUnknown;
+                     }
+                     //TODO: all the other types of rules
+                     pMidiRules[i] = NULL;
+                 }
+             }
+         }
+         if (pFile->GetAutoLoad()) {
+             if (!pRegions) pRegions = new RegionList;
+             RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
+             if (lrgn) {
+                 RIFF::List* rgn = lrgn->GetFirstSubList();
+                 while (rgn) {
+                     if (rgn->GetListType() == LIST_TYPE_RGN) {
+                         __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);
+                         pRegions->push_back(new Region(this, rgn));
+                     }
+                     rgn = lrgn->GetNextSubList();
+                 }
+                 // Creating Region Key Table for fast lookup
+                 UpdateRegionKeyTable();
              }
          }
-         if (!pRegions) pRegions = new RegionList;
+         // own gig format extensions
-         RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
+         RIFF::List* lst3LS = insList->GetSubList(LIST_TYPE_3LS);
-         if (lrgn) {
+         if (lst3LS) {
-             RIFF::List* rgn = lrgn->GetFirstSubList();
+             RIFF::Chunk* ckSCSL = lst3LS->GetSubChunk(CHUNK_ID_SCSL);
-             while (rgn) {
+             if (ckSCSL) {
-                 if (rgn->GetListType() == LIST_TYPE_RGN) {
+                 int headerSize = ckSCSL->ReadUint32();
-                     __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);
+                 int slotCount  = ckSCSL->ReadUint32();
-                     pRegions->push_back(new Region(this, rgn));
+                 if (slotCount) {
+                     int slotSize  = ckSCSL->ReadUint32();
+                     ckSCSL->SetPos(headerSize); // in case of future header extensions
+                     int unknownSpace = slotSize - 2*sizeof(uint32_t); // in case of future slot extensions
+                     for (int i = 0; i < slotCount; ++i) {
+                         _ScriptPooolEntry e;
+                         e.fileOffset = ckSCSL->ReadUint32();
+                         e.bypass     = ckSCSL->ReadUint32() & 1;
+                         if (unknownSpace) ckSCSL->SetPos(unknownSpace, RIFF::stream_curpos); // in case of future extensions
+                         scriptPoolFileOffsets.push_back(e);
+                     }
                  }
-                 rgn = lrgn->GetNextSubList();
              }
-             // Creating Region Key Table for fast lookup
-             UpdateRegionKeyTable();
          }
          __notify_progress(pProgress, 1.0f); // notify done
      }
      void Instrument::UpdateRegionKeyTable() {
+         for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;
          RegionList::iterator iter = pRegions->begin();
          RegionList::iterator end  = pRegions->end();
          for (; iter != end; ++iter) {
-Line 2775 
 namespace {
+Line 4467 
 namespace {
      }
      Instrument::~Instrument() {
+         for (int i = 0 ; pMidiRules[i] ; i++) {
+             delete pMidiRules[i];
+         }
+         delete[] pMidiRules;
+         if (pScriptRefs) delete pScriptRefs;
      }
      /**
-Line 2784 
 namespace {
+Line 4481 
 namespace {
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
       *
+      * @param pProgress - callback function for progress notification
       * @throws gig::Exception if samples cannot be dereferenced
       */
-     void Instrument::UpdateChunks() {
+     void Instrument::UpdateChunks(progress_t* pProgress) {
          // first update base classes' chunks
-         DLS::Instrument::UpdateChunks();
+         DLS::Instrument::UpdateChunks(pProgress);
          // update Regions' chunks
          {
              RegionList::iterator iter = pRegions->begin();
              RegionList::iterator end  = pRegions->end();
              for (; iter != end; ++iter)
-                 (*iter)->UpdateChunks();
+                 (*iter)->UpdateChunks(pProgress);
          }
          // make sure 'lart' RIFF list chunk exists
-Line 2821 
 namespace {
+Line 4519 
 namespace {
                                      DimensionKeyRange.low << 1;
          pData[10] = dimkeystart;
          pData[11] = DimensionKeyRange.high;
+         if (pMidiRules[0] == 0 && _3ewg->GetSize() >= 34) {
+             pData[32] = 0;
+             pData[33] = 0;
+         } else {
+             for (int i = 0 ; pMidiRules[i] ; i++) {
+                 pMidiRules[i]->UpdateChunks(pData);
+             }
+         }
+         // own gig format extensions
+        if (ScriptSlotCount()) {
+            // make sure we have converted the original loaded script file
+            // offsets into valid Script object pointers
+            LoadScripts();
+            RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS);
+            if (!lst3LS) lst3LS = pCkInstrument->AddSubList(LIST_TYPE_3LS);
+            const int slotCount = pScriptRefs->size();
+            const int headerSize = 3 * sizeof(uint32_t);
+            const int slotSize  = 2 * sizeof(uint32_t);
+            const int totalChunkSize = headerSize + slotCount * slotSize;
+            RIFF::Chunk* ckSCSL = lst3LS->GetSubChunk(CHUNK_ID_SCSL);
+            if (!ckSCSL) ckSCSL = lst3LS->AddSubChunk(CHUNK_ID_SCSL, totalChunkSize);
+            else ckSCSL->Resize(totalChunkSize);
+            uint8_t* pData = (uint8_t*) ckSCSL->LoadChunkData();
+            int pos = 0;
+            store32(&pData[pos], headerSize);
+            pos += sizeof(uint32_t);
+            store32(&pData[pos], slotCount);
+            pos += sizeof(uint32_t);
+            store32(&pData[pos], slotSize);
+            pos += sizeof(uint32_t);
+            for (int i = 0; i < slotCount; ++i) {
+                // arbitrary value, the actual file offset will be updated in
+                // UpdateScriptFileOffsets() after the file has been resized
+                int bogusFileOffset = 0;
+                store32(&pData[pos], bogusFileOffset);
+                pos += sizeof(uint32_t);
+                store32(&pData[pos], (*pScriptRefs)[i].bypass ? 1 : 0);
+                pos += sizeof(uint32_t);
+            }
+        } else {
+            // no script slots, so get rid of any LS custom RIFF chunks (if any)
+            RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS);
+            if (lst3LS) pCkInstrument->DeleteSubChunk(lst3LS);
+        }
+     }
+     void Instrument::UpdateScriptFileOffsets() {
+        // own gig format extensions
+        if (pScriptRefs && pScriptRefs->size() > 0) {
+            RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS);
+            RIFF::Chunk* ckSCSL = lst3LS->GetSubChunk(CHUNK_ID_SCSL);
+            const int slotCount = pScriptRefs->size();
+            const int headerSize = 3 * sizeof(uint32_t);
+            ckSCSL->SetPos(headerSize);
+            for (int i = 0; i < slotCount; ++i) {
+                uint32_t fileOffset =
+                     (*pScriptRefs)[i].script->pChunk->GetFilePos() -
+                     (*pScriptRefs)[i].script->pChunk->GetPos() -
+                     CHUNK_HEADER_SIZE(ckSCSL->GetFile()->GetFileOffsetSize());
+                ckSCSL->WriteUint32(&fileOffset);
+                // jump over flags entry (containing the bypass flag)
+                ckSCSL->SetPos(sizeof(uint32_t), RIFF::stream_curpos);
+            }
+        }
      }
      /**
-Line 2831 
 namespace {
+Line 4596 
 namespace {
       *             there is no Region defined for the given \a Key
       */
      Region* Instrument::GetRegion(unsigned int Key) {
-         if (!pRegions || !pRegions->size() || Key > 127) return NULL;
+         if (!pRegions || pRegions->empty() || Key > 127) return NULL;
          return RegionKeyTable[Key];
          /*for (int i = 0; i < Regions; i++) {
-Line 2889 
 namespace {
+Line 4654 
 namespace {
          UpdateRegionKeyTable();
      }
+     /**
+      * Move this instrument at the position before @arg dst.
+      *
+      * This method can be used to reorder the sequence of instruments in a
+      * .gig file. This might be helpful especially on large .gig files which
+      * contain a large number of instruments within the same .gig file. So
+      * grouping such instruments to similar ones, can help to keep track of them
+      * when working with such complex .gig files.
+      *
+      * When calling this method, this instrument will be removed from in its
+      * current position in the instruments list and moved to the requested
+      * target position provided by @param dst. You may also pass NULL as
+      * argument to this method, in that case this intrument will be moved to the
+      * very end of the .gig file's instrument list.
+      *
+      * You have to call Save() to make the order change persistent to the .gig
+      * file.
+      *
+      * Currently this method is limited to moving the instrument within the same
+      * .gig file. Trying to move it to another .gig file by calling this method
+      * will throw an exception.
+      *
+      * @param dst - destination instrument at which this instrument will be
+      *              moved to, or pass NULL for moving to end of list
+      * @throw gig::Exception if this instrument and target instrument are not
+      *                       part of the same file
+      */
+     void Instrument::MoveTo(Instrument* dst) {
+         if (dst && GetParent() != dst->GetParent())
+             throw Exception(
+                 "gig::Instrument::MoveTo() can only be used for moving within "
+                 "the same gig file."
+             );
+         File* pFile = (File*) GetParent();
+         // move this instrument within the instrument list
+         {
+             File::InstrumentList& list = *pFile->pInstruments;
+             File::InstrumentList::iterator itFrom =
+                 std::find(list.begin(), list.end(), static_cast<DLS::Instrument*>(this));
+             File::InstrumentList::iterator itTo =
+                 std::find(list.begin(), list.end(), static_cast<DLS::Instrument*>(dst));
+             list.splice(itTo, list, itFrom);
+         }
+         // move the instrument's actual list RIFF chunk appropriately
+         RIFF::List* lstCkInstruments = pFile->pRIFF->GetSubList(LIST_TYPE_LINS);
+         lstCkInstruments->MoveSubChunk(
+             this->pCkInstrument,
+             (RIFF::Chunk*) ((dst) ? dst->pCkInstrument : NULL)
+         );
+     }
+     /**
+      * Returns a MIDI rule of the instrument.
+      *
+      * The list of MIDI rules, at least in gig v3, always contains at
+      * most two rules. The second rule can only be the DEF filter
+      * (which currently isn't supported by libgig).
+      *
+      * @param i - MIDI rule number
+      * @returns   pointer address to MIDI rule number i or NULL if there is none
+      */
+     MidiRule* Instrument::GetMidiRule(int i) {
+         return pMidiRules[i];
+     }
+     /**
+      * Adds the "controller trigger" MIDI rule to the instrument.
+      *
+      * @returns the new MIDI rule
+      */
+     MidiRuleCtrlTrigger* Instrument::AddMidiRuleCtrlTrigger() {
+         delete pMidiRules[0];
+         MidiRuleCtrlTrigger* r = new MidiRuleCtrlTrigger;
+         pMidiRules[0] = r;
+         pMidiRules[1] = 0;
+         return r;
+     }
+     /**
+      * Adds the legato MIDI rule to the instrument.
+      *
+      * @returns the new MIDI rule
+      */
+     MidiRuleLegato* Instrument::AddMidiRuleLegato() {
+         delete pMidiRules[0];
+         MidiRuleLegato* r = new MidiRuleLegato;
+         pMidiRules[0] = r;
+         pMidiRules[1] = 0;
+         return r;
+     }
+     /**
+      * Adds the alternator MIDI rule to the instrument.
+      *
+      * @returns the new MIDI rule
+      */
+     MidiRuleAlternator* Instrument::AddMidiRuleAlternator() {
+         delete pMidiRules[0];
+         MidiRuleAlternator* r = new MidiRuleAlternator;
+         pMidiRules[0] = r;
+         pMidiRules[1] = 0;
+         return r;
+     }
+     /**
+      * Deletes a MIDI rule from the instrument.
+      *
+      * @param i - MIDI rule number
+      */
+     void Instrument::DeleteMidiRule(int i) {
+         delete pMidiRules[i];
+         pMidiRules[i] = 0;
+     }
+     void Instrument::LoadScripts() {
+         if (pScriptRefs) return;
+         pScriptRefs = new std::vector<_ScriptPooolRef>;
+         if (scriptPoolFileOffsets.empty()) return;
+         File* pFile = (File*) GetParent();
+         for (uint k = 0; k < scriptPoolFileOffsets.size(); ++k) {
+             uint32_t soughtOffset = scriptPoolFileOffsets[k].fileOffset;
+             for (uint i = 0; pFile->GetScriptGroup(i); ++i) {
+                 ScriptGroup* group = pFile->GetScriptGroup(i);
+                 for (uint s = 0; group->GetScript(s); ++s) {
+                     Script* script = group->GetScript(s);
+                     if (script->pChunk) {
+                         uint32_t offset = script->pChunk->GetFilePos() -
+                                           script->pChunk->GetPos() -
+                                           CHUNK_HEADER_SIZE(script->pChunk->GetFile()->GetFileOffsetSize());
+                         if (offset == soughtOffset)
+                         {
+                             _ScriptPooolRef ref;
+                             ref.script = script;
+                             ref.bypass = scriptPoolFileOffsets[k].bypass;
+                             pScriptRefs->push_back(ref);
+                             break;
+                         }
+                     }
+                 }
+             }
+         }
+         // we don't need that anymore
+         scriptPoolFileOffsets.clear();
+     }
+     /** @brief Get instrument script (gig format extension).
+      *
+      * Returns the real-time instrument script of instrument script slot
+      * @a index.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param index - instrument script slot index
+      * @returns script or NULL if index is out of bounds
+      */
+     Script* Instrument::GetScriptOfSlot(uint index) {
+         LoadScripts();
+         if (index >= pScriptRefs->size()) return NULL;
+         return pScriptRefs->at(index).script;
+     }
+     /** @brief Add new instrument script slot (gig format extension).
+      *
+      * Add the given real-time instrument script reference to this instrument,
+      * which shall be executed by the sampler for for this instrument. The
+      * script will be added to the end of the script list of this instrument.
+      * The positions of the scripts in the Instrument's Script list are
+      * relevant, because they define in which order they shall be executed by
+      * the sampler. For this reason it is also legal to add the same script
+      * twice to an instrument, for example you might have a script called
+      * "MyFilter" which performs an event filter task, and you might have
+      * another script called "MyNoteTrigger" which triggers new notes, then you
+      * might for example have the following list of scripts on the instrument:
+      *
+      * 1. Script "MyFilter"
+      * 2. Script "MyNoteTrigger"
+      * 3. Script "MyFilter"
+      *
+      * Which would make sense, because the 2nd script launched new events, which
+      * you might need to filter as well.
+      *
+      * There are two ways to disable / "bypass" scripts. You can either disable
+      * a script locally for the respective script slot on an instrument (i.e. by
+      * passing @c false to the 2nd argument of this method, or by calling
+      * SetScriptBypassed()). Or you can disable a script globally for all slots
+      * and all instruments by setting Script::Bypass.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param pScript - script that shall be executed for this instrument
+      * @param bypass  - if enabled, the sampler shall skip executing this
+      *                  script (in the respective list position)
+      * @see SetScriptBypassed()
+      */
+     void Instrument::AddScriptSlot(Script* pScript, bool bypass) {
+         LoadScripts();
+         _ScriptPooolRef ref = { pScript, bypass };
+         pScriptRefs->push_back(ref);
+     }
+     /** @brief Flip two script slots with each other (gig format extension).
+      *
+      * Swaps the position of the two given scripts in the Instrument's Script
+      * list. The positions of the scripts in the Instrument's Script list are
+      * relevant, because they define in which order they shall be executed by
+      * the sampler.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param index1 - index of the first script slot to swap
+      * @param index2 - index of the second script slot to swap
+      */
+     void Instrument::SwapScriptSlots(uint index1, uint index2) {
+         LoadScripts();
+         if (index1 >= pScriptRefs->size() || index2 >= pScriptRefs->size())
+             return;
+         _ScriptPooolRef tmp = (*pScriptRefs)[index1];
+         (*pScriptRefs)[index1] = (*pScriptRefs)[index2];
+         (*pScriptRefs)[index2] = tmp;
+     }
+     /** @brief Remove script slot.
+      *
+      * Removes the script slot with the given slot index.
+      *
+      * @param index - index of script slot to remove
+      */
+     void Instrument::RemoveScriptSlot(uint index) {
+         LoadScripts();
+         if (index >= pScriptRefs->size()) return;
+         pScriptRefs->erase( pScriptRefs->begin() + index );
+     }
+     /** @brief Remove reference to given Script (gig format extension).
+      *
+      * This will remove all script slots on the instrument which are referencing
+      * the given script.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param pScript - script reference to remove from this instrument
+      * @see RemoveScriptSlot()
+      */
+     void Instrument::RemoveScript(Script* pScript) {
+         LoadScripts();
+         for (int i = pScriptRefs->size() - 1; i >= 0; --i) {
+             if ((*pScriptRefs)[i].script == pScript) {
+                 pScriptRefs->erase( pScriptRefs->begin() + i );
+             }
+         }
+     }
+     /** @brief Instrument's amount of script slots.
+      *
+      * This method returns the amount of script slots this instrument currently
+      * uses.
+      *
+      * A script slot is a reference of a real-time instrument script to be
+      * executed by the sampler. The scripts will be executed by the sampler in
+      * sequence of the slots. One (same) script may be referenced multiple
+      * times in different slots.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      */
+     uint Instrument::ScriptSlotCount() const {
+         return pScriptRefs ? pScriptRefs->size() : scriptPoolFileOffsets.size();
+     }
+     /** @brief Whether script execution shall be skipped.
+      *
+      * Defines locally for the Script reference slot in the Instrument's Script
+      * list, whether the script shall be skipped by the sampler regarding
+      * execution.
+      *
+      * It is also possible to ignore exeuction of the script globally, for all
+      * slots and for all instruments by setting Script::Bypass.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param index - index of the script slot on this instrument
+      * @see Script::Bypass
+      */
+     bool Instrument::IsScriptSlotBypassed(uint index) {
+         if (index >= ScriptSlotCount()) return false;
+         return pScriptRefs ? pScriptRefs->at(index).bypass
+                            : scriptPoolFileOffsets.at(index).bypass;
+     }
+     /** @brief Defines whether execution shall be skipped.
+      *
+      * You can call this method to define locally whether or whether not the
+      * given script slot shall be executed by the sampler.
+      *
+      * @note This is an own format extension which did not exist i.e. in the
+      * GigaStudio 4 software. It will currently only work with LinuxSampler and
+      * gigedit.
+      *
+      * @param index - script slot index on this instrument
+      * @param bBypass - if true, the script slot will be skipped by the sampler
+      * @see Script::Bypass
+      */
+     void Instrument::SetScriptSlotBypassed(uint index, bool bBypass) {
+         if (index >= ScriptSlotCount()) return;
+         if (pScriptRefs)
+             pScriptRefs->at(index).bypass = bBypass;
+         else
+             scriptPoolFileOffsets.at(index).bypass = bBypass;
+     }
+     /**
+      * Make a (semi) deep copy of the Instrument object given by @a orig
+      * and assign it to this object.
+      *
+      * Note that all sample pointers referenced by @a orig are simply copied as
+      * memory address. Thus the respective samples are shared, not duplicated!
+      *
+      * @param orig - original Instrument object to be copied from
+      */
+     void Instrument::CopyAssign(const Instrument* orig) {
+         CopyAssign(orig, NULL);
+     }
+     /**
+      * Make a (semi) deep copy of the Instrument object given by @a orig
+      * and assign it to this object.
+      *
+      * @param orig - original Instrument object to be copied from
+      * @param mSamples - crosslink map between the foreign file's samples and
+      *                   this file's samples
+      */
+     void Instrument::CopyAssign(const Instrument* orig, const std::map<Sample*,Sample*>* mSamples) {
+         // handle base class
+         // (without copying DLS region stuff)
+         DLS::Instrument::CopyAssignCore(orig);
+         // handle own member variables
+         Attenuation = orig->Attenuation;
+         EffectSend = orig->EffectSend;
+         FineTune = orig->FineTune;
+         PitchbendRange = orig->PitchbendRange;
+         PianoReleaseMode = orig->PianoReleaseMode;
+         DimensionKeyRange = orig->DimensionKeyRange;
+         scriptPoolFileOffsets = orig->scriptPoolFileOffsets;
+         pScriptRefs = orig->pScriptRefs;
+         // free old midi rules
+         for (int i = 0 ; pMidiRules[i] ; i++) {
+             delete pMidiRules[i];
+         }
+         //TODO: MIDI rule copying
+         pMidiRules[0] = NULL;
+         // delete all old regions
+         while (Regions) DeleteRegion(GetFirstRegion());
+         // create new regions and copy them from original
+         {
+             RegionList::const_iterator it = orig->pRegions->begin();
+             for (int i = 0; i < orig->Regions; ++i, ++it) {
+                 Region* dstRgn = AddRegion();
+                 //NOTE: Region does semi-deep copy !
+                 dstRgn->CopyAssign(
+                     static_cast<gig::Region*>(*it),
+                     mSamples
+                 );
+             }
+         }
+         UpdateRegionKeyTable();
+     }
  // *************** Group ***************
-Line 2918 
 namespace {
+Line 5071 
 namespace {
       *
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
+      *
+      * @param pProgress - callback function for progress notification
       */
-     void Group::UpdateChunks() {
+     void Group::UpdateChunks(progress_t* pProgress) {
          // make sure <3gri> and <3gnl> list chunks exist
          RIFF::List* _3gri = pFile->pRIFF->GetSubList(LIST_TYPE_3GRI);
          if (!_3gri) {
-Line 3014 
 namespace {
+Line 5169 
 namespace {
  // *************** File ***************
  // *
-     // File version 2.0, 1998-06-28
+     /// Reflects Gigasampler file format version 2.0 (1998-06-28).
      const DLS::version_t File::VERSION_2 = {
 , 2, 19980628 & 0xffff, 19980628 >> 16
      };
-     // File version 3.0, 2003-03-31
+     /// Reflects Gigasampler file format version 3.0 (2003-03-31).
      const DLS::version_t File::VERSION_3 = {
 , 3, 20030331 & 0xffff, 20030331 >> 16
      };
-     const DLS::Info::FixedStringLength File::FixedStringLengths[] = {
+     static const DLS::Info::string_length_t _FileFixedStringLengths[] = {
          { CHUNK_ID_IARL, 256 },
          { CHUNK_ID_IART, 128 },
          { CHUNK_ID_ICMS, 128 },
-Line 3046 
 namespace {
+Line 5201 
 namespace {
      };
      File::File() : DLS::File() {
+         bAutoLoad = true;
          *pVersion = VERSION_3;
          pGroups = NULL;
-         pInfo->FixedStringLengths = FixedStringLengths;
+         pScriptGroups = NULL;
+         pInfo->SetFixedStringLengths(_FileFixedStringLengths);
          pInfo->ArchivalLocation = String(256, ' ');
          // add some mandatory chunks to get the file chunks in right
-Line 3061 
 namespace {
+Line 5218 
 namespace {
      }
      File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) {
+         bAutoLoad = true;
          pGroups = NULL;
-         pInfo->FixedStringLengths = FixedStringLengths;
+         pScriptGroups = NULL;
+         pInfo->SetFixedStringLengths(_FileFixedStringLengths);
      }
      File::~File() {
-Line 3075 
 namespace {
+Line 5234 
 namespace {
              }
              delete pGroups;
          }
+         if (pScriptGroups) {
+             std::list<ScriptGroup*>::iterator iter = pScriptGroups->begin();
+             std::list<ScriptGroup*>::iterator end  = pScriptGroups->end();
+             while (iter != end) {
+                 delete *iter;
+                 ++iter;
+             }
+             delete pScriptGroups;
+         }
      }
      Sample* File::GetFirstSample(progress_t* pProgress) {
-Line 3089 
 namespace {
+Line 5257 
 namespace {
          SamplesIterator++;
          return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL );
      }
+     /**
+      * Returns Sample object of @a index.
+      *
+      * @returns sample object or NULL if index is out of bounds
+      */
+     Sample* File::GetSample(uint index) {
+         if (!pSamples) LoadSamples();
+         if (!pSamples) return NULL;
+         DLS::File::SampleList::iterator it = pSamples->begin();
+         for (int i = 0; i < index; ++i) {
+             ++it;
+             if (it == pSamples->end()) return NULL;
+         }
+         if (it == pSamples->end()) return NULL;
+         return static_cast<gig::Sample*>( *it );
+     }
      /** @brief Add a new sample.
       *
-Line 3130 
 namespace {
+Line 5315 
 namespace {
          pSamples->erase(iter);
          delete pSample;
+         SampleList::iterator tmp = SamplesIterator;
          // remove all references to the sample
          for (Instrument* instrument = GetFirstInstrument() ; instrument ;
               instrument = GetNextInstrument()) {
-Line 3144 
 namespace {
+Line 5330 
 namespace {
                  }
              }
          }
+         SamplesIterator = tmp; // restore iterator
      }
      void File::LoadSamples() {
-Line 3164 
 namespace {
+Line 5351 
 namespace {
          int iTotalSamples = WavePoolCount;
          // check if samples should be loaded from extension files
+         // (only for old gig files < 2 GB)
          int lastFileNo = 0;
-         for (int i = 0 ; i < WavePoolCount ; i++) {
+         if (!file->IsNew() && !(file->GetCurrentFileSize() >> 31)) {
-             if (pWavePoolTableHi[i] > lastFileNo) lastFileNo = pWavePoolTableHi[i];
+             for (int i = 0 ; i < WavePoolCount ; i++) {
+                 if (pWavePoolTableHi[i] > lastFileNo) lastFileNo = pWavePoolTableHi[i];
+             }
          }
          String name(pRIFF->GetFileName());
          int nameLen = name.length();
-Line 3176 
 namespace {
+Line 5366 
 namespace {
          for (int fileNo = 0 ; ; ) {
              RIFF::List* wvpl = file->GetSubList(LIST_TYPE_WVPL);
              if (wvpl) {
-                 unsigned long wvplFileOffset = wvpl->GetFilePos();
+                 file_offset_t wvplFileOffset = wvpl->GetFilePos();
                  RIFF::List* wave = wvpl->GetFirstSubList();
                  while (wave) {
                      if (wave->GetListType() == LIST_TYPE_WAVE) {
-Line 3184 
 namespace {
+Line 5374 
 namespace {
                          const float subprogress = (float) iSampleIndex / (float) iTotalSamples;
                          __notify_progress(pProgress, subprogress);
-                         unsigned long waveFileOffset = wave->GetFilePos();
+                         file_offset_t waveFileOffset = wave->GetFilePos();
                          pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset, fileNo));
                          iSampleIndex++;
-Line 3234 
 namespace {
+Line 5424 
 namespace {
              progress_t subprogress;
              __divide_progress(pProgress, &subprogress, 3.0f, 0.0f); // randomly schedule 33% for this subtask
              __notify_progress(&subprogress, 0.0f);
-             GetFirstSample(&subprogress); // now force all samples to be loaded
+             if (GetAutoLoad())
+                 GetFirstSample(&subprogress); // now force all samples to be loaded
              __notify_progress(&subprogress, 1.0f);
              // instrument loading subtask
-Line 3283 
 namespace {
+Line 5474 
 namespace {
         pInstruments->push_back(pInstrument);
         return pInstrument;
      }
+     /** @brief Add a duplicate of an existing instrument.
+      *
+      * Duplicates the instrument definition given by @a orig and adds it
+      * to this file. This allows in an instrument editor application to
+      * easily create variations of an instrument, which will be stored in
+      * the same .gig file, sharing i.e. the same samples.
+      *
+      * Note that all sample pointers referenced by @a orig are simply copied as
+      * memory address. Thus the respective samples are shared, not duplicated!
+      *
+      * You have to call Save() to make this persistent to the file.
+      *
+      * @param orig - original instrument to be copied
+      * @returns duplicated copy of the given instrument
+      */
+     Instrument* File::AddDuplicateInstrument(const Instrument* orig) {
+         Instrument* instr = AddInstrument();
+         instr->CopyAssign(orig);
+         return instr;
+     }
+     /** @brief Add content of another existing file.
+      *
+      * Duplicates the samples, groups and instruments of the original file
+      * given by @a pFile and adds them to @c this File. In case @c this File is
+      * a new one that you haven't saved before, then you have to call
+      * SetFileName() before calling AddContentOf(), because this method will
+      * automatically save this file during operation, which is required for
+      * writing the sample waveform data by disk streaming.
+      *
+      * @param pFile - original file whose's content shall be copied from
+      */
+     void File::AddContentOf(File* pFile) {
+         static int iCallCount = -1;
+         iCallCount++;
+         std::map<Group*,Group*> mGroups;
+         std::map<Sample*,Sample*> mSamples;
+         // clone sample groups
+         for (int i = 0; pFile->GetGroup(i); ++i) {
+             Group* g = AddGroup();
+             g->Name =
+                 "COPY" + ToString(iCallCount) + "_" + pFile->GetGroup(i)->Name;
+             mGroups[pFile->GetGroup(i)] = g;
+         }
+         // clone samples (not waveform data here yet)
+         for (int i = 0; pFile->GetSample(i); ++i) {
+             Sample* s = AddSample();
+             s->CopyAssignMeta(pFile->GetSample(i));
+             mGroups[pFile->GetSample(i)->GetGroup()]->AddSample(s);
+             mSamples[pFile->GetSample(i)] = s;
+         }
+         //BUG: For some reason this method only works with this additional
+         //     Save() call in between here.
+         //
+         // Important: The correct one of the 2 Save() methods has to be called
+         // here, depending on whether the file is completely new or has been
+         // saved to disk already, otherwise it will result in data corruption.
+         if (pRIFF->IsNew())
+             Save(GetFileName());
+         else
+             Save();
+         // clone instruments
+         // (passing the crosslink table here for the cloned samples)
+         for (int i = 0; pFile->GetInstrument(i); ++i) {
+             Instrument* instr = AddInstrument();
+             instr->CopyAssign(pFile->GetInstrument(i), &mSamples);
+         }
+         // Mandatory: file needs to be saved to disk at this point, so this
+         // file has the correct size and data layout for writing the samples'
+         // waveform data to disk.
+         Save();
+         // clone samples' waveform data
+         // (using direct read & write disk streaming)
+         for (int i = 0; pFile->GetSample(i); ++i) {
+             mSamples[pFile->GetSample(i)]->CopyAssignWave(pFile->GetSample(i));
+         }
+     }
      /** @brief Delete an instrument.
       *
-Line 3385 
 namespace {
+Line 5660 
 namespace {
          return NULL;
      }
+     /**
+      * Returns the group with the given group name.
+      *
+      * Note: group names don't have to be unique in the gig format! So there
+      * can be multiple groups with the same name. This method will simply
+      * return the first group found with the given name.
+      *
+      * @param name - name of the sought group
+      * @returns sought group or NULL if there's no group with that name
+      */
+     Group* File::GetGroup(String name) {
+         if (!pGroups) LoadGroups();
+         GroupsIterator = pGroups->begin();
+         for (uint i = 0; GroupsIterator != pGroups->end(); ++GroupsIterator, ++i)
+             if ((*GroupsIterator)->Name == name) return *GroupsIterator;
+         return NULL;
+     }
      Group* File::AddGroup() {
          if (!pGroups) LoadGroups();
          // there must always be at least one group
-Line 3465 
 namespace {
+Line 5758 
 namespace {
          }
      }
+     /** @brief Get instrument script group (by index).
+      *
+      * Returns the real-time instrument script group with the given index.
+      *
+      * @param index - number of the sought group (0..n)
+      * @returns sought script group or NULL if there's no such group
+      */
+     ScriptGroup* File::GetScriptGroup(uint index) {
+         if (!pScriptGroups) LoadScriptGroups();
+         std::list<ScriptGroup*>::iterator it = pScriptGroups->begin();
+         for (uint i = 0; it != pScriptGroups->end(); ++i, ++it)
+             if (i == index) return *it;
+         return NULL;
+     }
+     /** @brief Get instrument script group (by name).
+      *
+      * Returns the first real-time instrument script group found with the given
+      * group name. Note that group names may not necessarily be unique.
+      *
+      * @param name - name of the sought script group
+      * @returns sought script group or NULL if there's no such group
+      */
+     ScriptGroup* File::GetScriptGroup(const String& name) {
+         if (!pScriptGroups) LoadScriptGroups();
+         std::list<ScriptGroup*>::iterator it = pScriptGroups->begin();
+         for (uint i = 0; it != pScriptGroups->end(); ++i, ++it)
+             if ((*it)->Name == name) return *it;
+         return NULL;
+     }
+     /** @brief Add new instrument script group.
+      *
+      * Adds a new, empty real-time instrument script group to the file.
+      *
+      * You have to call Save() to make this persistent to the file.
+      *
+      * @return new empty script group
+      */
+     ScriptGroup* File::AddScriptGroup() {
+         if (!pScriptGroups) LoadScriptGroups();
+         ScriptGroup* pScriptGroup = new ScriptGroup(this, NULL);
+         pScriptGroups->push_back(pScriptGroup);
+         return pScriptGroup;
+     }
+     /** @brief Delete an instrument script group.
+      *
+      * This will delete the given real-time instrument script group and all its
+      * instrument scripts it contains. References inside instruments that are
+      * using the deleted scripts will be removed from the respective instruments
+      * accordingly.
+      *
+      * You have to call Save() to make this persistent to the file.
+      *
+      * @param pScriptGroup - script group to delete
+      * @throws gig::Exception if given script group could not be found
+      */
+     void File::DeleteScriptGroup(ScriptGroup* pScriptGroup) {
+         if (!pScriptGroups) LoadScriptGroups();
+         std::list<ScriptGroup*>::iterator iter =
+             find(pScriptGroups->begin(), pScriptGroups->end(), pScriptGroup);
+         if (iter == pScriptGroups->end())
+             throw gig::Exception("Could not delete script group, could not find given script group");
+         pScriptGroups->erase(iter);
+         for (int i = 0; pScriptGroup->GetScript(i); ++i)
+             pScriptGroup->DeleteScript(pScriptGroup->GetScript(i));
+         if (pScriptGroup->pList)
+             pScriptGroup->pList->GetParent()->DeleteSubChunk(pScriptGroup->pList);
+         delete pScriptGroup;
+     }
+     void File::LoadScriptGroups() {
+         if (pScriptGroups) return;
+         pScriptGroups = new std::list<ScriptGroup*>;
+         RIFF::List* lstLS = pRIFF->GetSubList(LIST_TYPE_3LS);
+         if (lstLS) {
+             for (RIFF::List* lst = lstLS->GetFirstSubList(); lst;
+                  lst = lstLS->GetNextSubList())
+             {
+                 if (lst->GetListType() == LIST_TYPE_RTIS) {
+                     pScriptGroups->push_back(new ScriptGroup(this, lst));
+                 }
+             }
+         }
+     }
      /**
       * Apply all the gig file's current instruments, samples, groups and settings
       * to the respective RIFF chunks. You have to call Save() to make changes
-Line 3473 
 namespace {
+Line 5853 
 namespace {
       * Usually there is absolutely no need to call this method explicitly.
       * It will be called automatically when File::Save() was called.
       *
+      * @param pProgress - callback function for progress notification
       * @throws Exception - on errors
       */
-     void File::UpdateChunks() {
+     void File::UpdateChunks(progress_t* pProgress) {
          bool newFile = pRIFF->GetSubList(LIST_TYPE_INFO) == NULL;
-         b64BitWavePoolOffsets = pVersion && pVersion->major == 3;
+         // update own gig format extension chunks
+         // (not part of the GigaStudio 4 format)
+         RIFF::List* lst3LS = pRIFF->GetSubList(LIST_TYPE_3LS);
+         if (!lst3LS) {
+             lst3LS = pRIFF->AddSubList(LIST_TYPE_3LS);
+         }
+         // Make sure <3LS > chunk is placed before <ptbl> chunk. The precise
+         // location of <3LS > is irrelevant, however it should be located
+         // before  the actual wave data
+         RIFF::Chunk* ckPTBL = pRIFF->GetSubChunk(CHUNK_ID_PTBL);
+         pRIFF->MoveSubChunk(lst3LS, ckPTBL);
+         // This must be performed before writing the chunks for instruments,
+         // because the instruments' script slots will write the file offsets
+         // of the respective instrument script chunk as reference.
+         if (pScriptGroups) {
+             // Update instrument script (group) chunks.
+             for (std::list<ScriptGroup*>::iterator it = pScriptGroups->begin();
+                  it != pScriptGroups->end(); ++it)
+             {
+                 (*it)->UpdateChunks(pProgress);
+             }
+         }
+         // in case no libgig custom format data was added, then remove the
+         // custom "3LS " chunk again
+         if (!lst3LS->CountSubChunks()) {
+             pRIFF->DeleteSubChunk(lst3LS);
+             lst3LS = NULL;
+         }
          // first update base class's chunks
-         DLS::File::UpdateChunks();
+         DLS::File::UpdateChunks(pProgress);
          if (newFile) {
              // INFO was added by Resource::UpdateChunks - make sure it
-Line 3495 
 namespace {
+Line 5905 
 namespace {
          // update group's chunks
          if (pGroups) {
-             std::list<Group*>::iterator iter = pGroups->begin();
+             // make sure '3gri' and '3gnl' list chunks exist
-             std::list<Group*>::iterator end  = pGroups->end();
+             // (before updating the Group chunks)
-             for (; iter != end; ++iter) {
+             RIFF::List* _3gri = pRIFF->GetSubList(LIST_TYPE_3GRI);
-                 (*iter)->UpdateChunks();
+             if (!_3gri) {
+                 _3gri = pRIFF->AddSubList(LIST_TYPE_3GRI);
+                 pRIFF->MoveSubChunk(_3gri, pRIFF->GetSubChunk(CHUNK_ID_PTBL));
              }
+             RIFF::List* _3gnl = _3gri->GetSubList(LIST_TYPE_3GNL);
+             if (!_3gnl) _3gnl = _3gri->AddSubList(LIST_TYPE_3GNL);
              // v3: make sure the file has 128 3gnm chunks
+             // (before updating the Group chunks)
              if (pVersion && pVersion->major == 3) {
-                 RIFF::List* _3gnl = pRIFF->GetSubList(LIST_TYPE_3GRI)->GetSubList(LIST_TYPE_3GNL);
                  RIFF::Chunk* _3gnm = _3gnl->GetFirstSubChunk();
                  for (int i = 0 ; i < 128 ; i++) {
                      if (i >= pGroups->size()) ::SaveString(CHUNK_ID_3GNM, _3gnm, _3gnl, "", "", true, 64);
                      if (_3gnm) _3gnm = _3gnl->GetNextSubChunk();
                  }
              }
+             std::list<Group*>::iterator iter = pGroups->begin();
+             std::list<Group*>::iterator end  = pGroups->end();
+             for (; iter != end; ++iter) {
+                 (*iter)->UpdateChunks(pProgress);
+             }
          }
          // update einf chunk
-Line 3640 
 namespace {
+Line 6060 
 namespace {
              if (einf && pVersion && pVersion->major == 3) pRIFF->MoveSubChunk(_3crc, einf);
          }
      }
+     void File::UpdateFileOffsets() {
+         DLS::File::UpdateFileOffsets();
+         for (Instrument* instrument = GetFirstInstrument(); instrument;
+              instrument = GetNextInstrument())
+         {
+             instrument->UpdateScriptFileOffsets();
+         }
+     }
+     /**
+      * Enable / disable automatic loading. By default this properyt is
+      * enabled and all informations are loaded automatically. However
+      * loading all Regions, DimensionRegions and especially samples might
+      * take a long time for large .gig files, and sometimes one might only
+      * be interested in retrieving very superficial informations like the
+      * amount of instruments and their names. In this case one might disable
+      * automatic loading to avoid very slow response times.
+      *
+      * @e CAUTION: by disabling this property many pointers (i.e. sample
+      * references) and informations will have invalid or even undefined
+      * data! This feature is currently only intended for retrieving very
+      * superficial informations in a very fast way. Don't use it to retrieve
+      * details like synthesis informations or even to modify .gig files!
+      */
+     void File::SetAutoLoad(bool b) {
+         bAutoLoad = b;
+     }
+     /**
+      * Returns whether automatic loading is enabled.
+      * @see SetAutoLoad()
+      */
+     bool File::GetAutoLoad() {
+         return bAutoLoad;
+     }

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+Added in v.2913

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