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

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

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-revision 1264 by persson,
Sun Jul 29 10:51:09 2007 UTC
+revision 1713 by persson,
Thu Mar  6 20:42:22 2008 UTC
 Line 25
  #include "helper.h"
+ #include <algorithm>
  #include <math.h>
  #include <iostream>
-Line 255 
 namespace {
+Line 256 
 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 342 
 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 323 
 namespace {
+Line 367 
 namespace {
       *                         is located, 0 otherwise
       */
      Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long 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 1168 
 namespace {
+Line 1214 
 namespace {
          // 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;
-Line 1178 
 namespace {
+Line 1224 
 namespace {
              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 1262 
 namespace {
+Line 1308 
 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 1511 
 namespace {
+Line 1558 
 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++;
+         *this = src; // default memberwise shallow copy of all parameters
+         pParentList = _3ewl; // restore the chunk pointer
-         // even stranger GSt: two of the velocity response curves for
+         // deep copy of owned structures
-         // filter cutoff are not used, instead another special curve
+         if (src.VelocityTable) {
-         // is chosen. This curve is not used anywhere else.
+             VelocityTable = new uint8_t[128];
-         if ((curveType == curve_type_nonlinear && depth == 0) ||
+             for (int k = 0 ; k < 128 ; k++)
-             (curveType == curve_type_special   && depth == 4)) {
+                 VelocityTable[k] = src.VelocityTable[k];
-             curveType = curve_type_special;
-             depth = 5;
          }
-         pVelocityCutoffTable = GetVelocityTable(curveType, depth,
+         if (src.pSampleLoops) {
-                                                 VCFCutoffController <= vcf_cutoff_ctrl_none2 ? VCFVelocityScale : 0);
+             pSampleLoops = new DLS::sample_loop_t[src.SampleLoops];
+             for (int k = 0 ; k < src.SampleLoops ; k++)
+                 pSampleLoops[k] = src.pSampleLoops[k];
+         }
+     }
+     /**
+      * 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 1550 
 namespace {
+Line 1611 
 namespace {
       * It will be called automatically when File::Save() was called.
       */
      void DimensionRegion::UpdateChunks() {
-         // 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();
-Line 1566 
 namespace {
+Line 1623 
 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 1617 
 namespace {
+Line 1674 
 namespace {
          pData[44] = eg1ctl;
          const uint8_t eg1ctrloptions =
-             (EG1ControllerInvert) ? 0x01 : 0x00 |
+             (EG1ControllerInvert ? 0x01 : 0x00) |
              GIG_EG_CTR_ATTACK_INFLUENCE_ENCODE(EG1ControllerAttackInfluence) |
              GIG_EG_CTR_DECAY_INFLUENCE_ENCODE(EG1ControllerDecayInfluence) |
              GIG_EG_CTR_RELEASE_INFLUENCE_ENCODE(EG1ControllerReleaseInfluence);
-Line 1627 
 namespace {
+Line 1684 
 namespace {
          pData[46] = eg2ctl;
          const uint8_t eg2ctrloptions =
-             (EG2ControllerInvert) ? 0x01 : 0x00 |
+             (EG2ControllerInvert ? 0x01 : 0x00) |
              GIG_EG_CTR_ATTACK_INFLUENCE_ENCODE(EG2ControllerAttackInfluence) |
              GIG_EG_CTR_DECAY_INFLUENCE_ENCODE(EG2ControllerDecayInfluence) |
              GIG_EG_CTR_RELEASE_INFLUENCE_ENCODE(EG2ControllerReleaseInfluence);
-Line 1805 
 namespace {
+Line 1862 
 namespace {
          const uint8_t eg1hold = (EG1Hold) ? 0x80 : 0x00; // bit 7
          pData[131] = eg1hold;
-         const uint8_t vcfcutoff = (VCFEnabled) ? 0x80 : 0x00 |  /* bit 7 */
+         const uint8_t vcfcutoff = (VCFEnabled ? 0x80 : 0x00) |  /* bit 7 */
                                    (VCFCutoff & 0x7f);   /* lower 7 bits */
          pData[132] = vcfcutoff;
          pData[133] = VCFCutoffController;
-         const uint8_t vcfvelscale = (VCFCutoffControllerInvert) ? 0x80 : 0x00 | /* bit 7 */
+         const uint8_t vcfvelscale = (VCFCutoffControllerInvert ? 0x80 : 0x00) | /* bit 7 */
                                      (VCFVelocityScale & 0x7f); /* lower 7 bits */
          pData[134] = vcfvelscale;
          // next byte unknown
-         const uint8_t vcfresonance = (VCFResonanceDynamic) ? 0x00 : 0x80 | /* bit 7 */
+         const uint8_t vcfresonance = (VCFResonanceDynamic ? 0x00 : 0x80) | /* bit 7 */
                                       (VCFResonance & 0x7f); /* lower 7 bits */
          pData[136] = vcfresonance;
-         const uint8_t vcfbreakpoint = (VCFKeyboardTracking) ? 0x80 : 0x00 | /* bit 7 */
+         const uint8_t vcfbreakpoint = (VCFKeyboardTracking ? 0x80 : 0x00) | /* bit 7 */
                                        (VCFKeyboardTrackingBreakpoint & 0x7f); /* lower 7 bits */
          pData[137] = vcfbreakpoint;
-Line 1837 
 namespace {
+Line 1894 
 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 1943 
 namespace {
          return table;
      }
+     Region* DimensionRegion::GetParent() const {
+         return pRegion;
+     }
      leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) {
          leverage_ctrl_t decodedcontroller;
          switch (EncodedController) {
-Line 2105 
 namespace {
+Line 2200 
 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 2373 
 namespace {
          // Actual Loading
+         if (!file->GetAutoLoad()) return;
          LoadDimensionRegions(rgnList);
          RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK);
-Line 2231 
 namespace {
+Line 2418 
 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 2440 
 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 2275 
 namespace {
+Line 2464 
 namespace {
          // first update base class's chunks
          DLS::Region::UpdateChunks();
-         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();
-             // 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 2312 
 namespace {
+Line 2492 
 namespace {
          for (int i = 0; i < iMaxDimensions; i++) {
              pData[4 + i * 8] = (uint8_t) pDimensionDefinitions[i].dimension;
              pData[5 + i * 8] = pDimensionDefinitions[i].bits;
-             pData[6 + i * 8] = shift;
+             pData[6 + i * 8] = pDimensionDefinitions[i].dimension == dimension_none ? 0 : shift;
              pData[7 + i * 8] = (1 << (shift + pDimensionDefinitions[i].bits)) - (1 << shift);
              pData[8 + i * 8] = pDimensionDefinitions[i].zones;
              // next 3 bytes unknown, always zero?
-Line 2334 
 namespace {
+Line 2514 
 namespace {
                          break;
                      }
                  }
-                 if (iWaveIndex < 0) throw gig::Exception("Could not update gig::Region, could not find DimensionRegion's sample");
              }
              store32(&pData[iWavePoolOffset + i * 4], iWaveIndex);
          }
-Line 2347 
 namespace {
+Line 2526 
 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 2356 
 namespace {
+Line 2535 
 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 2461 
 namespace {
+Line 2647 
 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 2708 
 namespace {
+Line 2924 
 namespace {
      }
+ // *************** 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();
+     }
+ }
  // *************** 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 2729 
 namespace {
+Line 2966 
 namespace {
          PianoReleaseMode = false;
          DimensionKeyRange.low = 0;
          DimensionKeyRange.high = 0;
+         pMidiRules = new MidiRule*[3];
+         pMidiRules[0] = NULL;
          // Loading
          RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART);
-Line 2743 
 namespace {
+Line 2982 
 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 (id1 == 4 && id2 == 16) {
+                         pMidiRules[i++] = new MidiRuleCtrlTrigger(_3ewg);
+                     }
+                     //TODO: all the other types of rules
+                     pMidiRules[i] = NULL;
+                 }
              }
          }
-         if (!pRegions) pRegions = new RegionList;
+         if (pFile->GetAutoLoad()) {
-         RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
+             if (!pRegions) pRegions = new RegionList;
-         if (lrgn) {
+             RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
-             RIFF::List* rgn = lrgn->GetFirstSubList();
+             if (lrgn) {
-             while (rgn) {
+                 RIFF::List* rgn = lrgn->GetFirstSubList();
-                 if (rgn->GetListType() == LIST_TYPE_RGN) {
+                 while (rgn) {
-                     __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);
+                     if (rgn->GetListType() == LIST_TYPE_RGN) {
-                     pRegions->push_back(new Region(this, rgn));
+                         __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);
+                         pRegions->push_back(new Region(this, rgn));
+                     }
+                     rgn = lrgn->GetNextSubList();
                  }
-                 rgn = lrgn->GetNextSubList();
+                 // Creating Region Key Table for fast lookup
+                 UpdateRegionKeyTable();
              }
-             // 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 2776 
 namespace {
+Line 3033 
 namespace {
      }
      Instrument::~Instrument() {
+         delete[] pMidiRules;
      }
      /**
-Line 2818 
 namespace {
+Line 3076 
 namespace {
          store32(&pData[2], Attenuation);
          store16(&pData[6], FineTune);
          store16(&pData[8], PitchbendRange);
-         const uint8_t dimkeystart = (PianoReleaseMode) ? 0x01 : 0x00 |
+         const uint8_t dimkeystart = (PianoReleaseMode ? 0x01 : 0x00) |
                                      DimensionKeyRange.low << 1;
          pData[10] = dimkeystart;
          pData[11] = DimensionKeyRange.high;
-Line 2832 
 namespace {
+Line 3090 
 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 2890 
 namespace {
+Line 3148 
 namespace {
          UpdateRegionKeyTable();
      }
+     /**
+      * 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];
+     }
  // *************** Group ***************
-Line 2929 
 namespace {
+Line 3200 
 namespace {
          }
          RIFF::List* _3gnl = _3gri->GetSubList(LIST_TYPE_3GNL);
          if (!_3gnl) _3gnl = _3gri->AddSubList(LIST_TYPE_3GNL);
+         if (!pNameChunk && pFile->pVersion && pFile->pVersion->major == 3) {
+             // v3 has a fixed list of 128 strings, find a free one
+             for (RIFF::Chunk* ck = _3gnl->GetFirstSubChunk() ; ck ; ck = _3gnl->GetNextSubChunk()) {
+                 if (strcmp(static_cast<char*>(ck->LoadChunkData()), "") == 0) {
+                     pNameChunk = ck;
+                     break;
+                 }
+             }
+         }
          // now store the name of this group as <3gnm> chunk as subchunk of the <3gnl> list chunk
          ::SaveString(CHUNK_ID_3GNM, pNameChunk, _3gnl, Name, String("Unnamed Group"), true, 64);
      }
-Line 3004 
 namespace {
+Line 3286 
 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 3036 
 namespace {
+Line 3318 
 namespace {
      };
      File::File() : DLS::File() {
+         bAutoLoad = true;
          *pVersion = VERSION_3;
          pGroups = NULL;
-         pInfo->FixedStringLengths = FixedStringLengths;
+         pInfo->SetFixedStringLengths(_FileFixedStringLengths);
          pInfo->ArchivalLocation = String(256, ' ');
          // add some mandatory chunks to get the file chunks in right
-Line 3051 
 namespace {
+Line 3334 
 namespace {
      }
      File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) {
+         bAutoLoad = true;
          pGroups = NULL;
-         pInfo->FixedStringLengths = FixedStringLengths;
+         pInfo->SetFixedStringLengths(_FileFixedStringLengths);
      }
      File::~File() {
-Line 3105 
 namespace {
+Line 3389 
 namespace {
      /** @brief Delete a sample.
       *
-      * This will delete the given Sample object from the gig file. You have
+      * This will delete the given Sample object from the gig file. Any
-      * to call Save() to make this persistent to the file.
+      * references to this sample from Regions and DimensionRegions will be
+      * removed. You have to call Save() to make this persistent to the file.
       *
       * @param pSample - sample to delete
       * @throws gig::Exception if given sample could not be found
-Line 3118 
 namespace {
+Line 3403 
 namespace {
          if (SamplesIterator != pSamples->end() && *SamplesIterator == pSample) ++SamplesIterator; // avoid iterator invalidation
          pSamples->erase(iter);
          delete pSample;
+         SampleList::iterator tmp = SamplesIterator;
+         // remove all references to the sample
+         for (Instrument* instrument = GetFirstInstrument() ; instrument ;
+              instrument = GetNextInstrument()) {
+             for (Region* region = instrument->GetFirstRegion() ; region ;
+                  region = instrument->GetNextRegion()) {
+                 if (region->GetSample() == pSample) region->SetSample(NULL);
+                 for (int i = 0 ; i < region->DimensionRegions ; i++) {
+                     gig::DimensionRegion *d = region->pDimensionRegions[i];
+                     if (d->pSample == pSample) d->pSample = NULL;
+                 }
+             }
+         }
+         SamplesIterator = tmp; // restore iterator
      }
      void File::LoadSamples() {
-Line 3208 
 namespace {
+Line 3510 
 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 3422 
 namespace {
+Line 3725 
 namespace {
                  RIFF::Chunk* ck = lst3gnl->GetFirstSubChunk();
                  while (ck) {
                      if (ck->GetChunkID() == CHUNK_ID_3GNM) {
+                         if (pVersion && pVersion->major == 3 &&
+                             strcmp(static_cast<char*>(ck->LoadChunkData()), "") == 0) break;
                          pGroups->push_back(new Group(this, ck));
                      }
                      ck = lst3gnl->GetNextSubChunk();
-Line 3471 
 namespace {
+Line 3777 
 namespace {
              for (; iter != end; ++iter) {
                  (*iter)->UpdateChunks();
              }
+             // v3: make sure the file has 128 3gnm 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();
+                 }
+             }
          }
          // update einf chunk
-Line 3602 
 namespace {
+Line 3918 
 namespace {
          }
      }
+     /**
+      * 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;
+     }
  // *************** Exception ***************

 Legend:



Removed from v.1264
 


changed lines


 
Added in v.1713
 Legend:



Removed from v.1264
 


changed lines


 
Added in v.1713
-Removed from v.1264
+Added in v.1713

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