/[svn]/libgig/trunk/src/gig.cpp
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revision 1316 by schoenebeck, Fri Aug 31 19:09:13 2007 UTC revision 1875 by schoenebeck, Thu Mar 26 13:32:59 2009 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file access library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2007 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2009 by Christian Schoenebeck                      *
6   *                              <cuse@users.sourceforge.net>               *   *                              <cuse@users.sourceforge.net>               *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
# Line 25  Line 25 
25    
26  #include "helper.h"  #include "helper.h"
27    
28    #include <algorithm>
29  #include <math.h>  #include <math.h>
30  #include <iostream>  #include <iostream>
31    
# Line 255  namespace { Line 256  namespace {
256    
257    
258    
259    // *************** Internal CRC-32 (Cyclic Redundancy Check) functions  ***************
260    // *
261    
262        static uint32_t* __initCRCTable() {
263            static uint32_t res[256];
264    
265            for (int i = 0 ; i < 256 ; i++) {
266                uint32_t c = i;
267                for (int j = 0 ; j < 8 ; j++) {
268                    c = (c & 1) ? 0xedb88320 ^ (c >> 1) : c >> 1;
269                }
270                res[i] = c;
271            }
272            return res;
273        }
274    
275        static const uint32_t* __CRCTable = __initCRCTable();
276    
277        /**
278         * Initialize a CRC variable.
279         *
280         * @param crc - variable to be initialized
281         */
282        inline static void __resetCRC(uint32_t& crc) {
283            crc = 0xffffffff;
284        }
285    
286        /**
287         * Used to calculate checksums of the sample data in a gig file. The
288         * checksums are stored in the 3crc chunk of the gig file and
289         * automatically updated when a sample is written with Sample::Write().
290         *
291         * One should call __resetCRC() to initialize the CRC variable to be
292         * used before calling this function the first time.
293         *
294         * After initializing the CRC variable one can call this function
295         * arbitrary times, i.e. to split the overall CRC calculation into
296         * steps.
297         *
298         * Once the whole data was processed by __calculateCRC(), one should
299         * call __encodeCRC() to get the final CRC result.
300         *
301         * @param buf     - pointer to data the CRC shall be calculated of
302         * @param bufSize - size of the data to be processed
303         * @param crc     - variable the CRC sum shall be stored to
304         */
305        static void __calculateCRC(unsigned char* buf, int bufSize, uint32_t& crc) {
306            for (int i = 0 ; i < bufSize ; i++) {
307                crc = __CRCTable[(crc ^ buf[i]) & 0xff] ^ (crc >> 8);
308            }
309        }
310    
311        /**
312         * Returns the final CRC result.
313         *
314         * @param crc - variable previously passed to __calculateCRC()
315         */
316        inline static uint32_t __encodeCRC(const uint32_t& crc) {
317            return crc ^ 0xffffffff;
318        }
319    
320    
321    
322  // *************** Other Internal functions  ***************  // *************** Other Internal functions  ***************
323  // *  // *
324    
# Line 278  namespace { Line 342  namespace {
342    
343    
344    
 // *************** 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;  
     }  
   
   
   
345  // *************** Sample ***************  // *************** Sample ***************
346  // *  // *
347    
# Line 323  namespace { Line 367  namespace {
367       *                         is located, 0 otherwise       *                         is located, 0 otherwise
368       */       */
369      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, unsigned long WavePoolOffset, unsigned long fileNo) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) {
370          static const DLS::Info::FixedStringLength fixedStringLengths[] = {          static const DLS::Info::string_length_t fixedStringLengths[] = {
371              { CHUNK_ID_INAM, 64 },              { CHUNK_ID_INAM, 64 },
372              { 0, 0 }              { 0, 0 }
373          };          };
374          pInfo->FixedStringLengths = fixedStringLengths;          pInfo->SetFixedStringLengths(fixedStringLengths);
375          Instances++;          Instances++;
376          FileNo = fileNo;          FileNo = fileNo;
377    
378            __resetCRC(crc);
379    
380          pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX);          pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX);
381          if (pCk3gix) {          if (pCk3gix) {
382              uint16_t iSampleGroup = pCk3gix->ReadInt16();              uint16_t iSampleGroup = pCk3gix->ReadInt16();
# Line 631  namespace { Line 677  namespace {
677          if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal;          if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal;
678          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
679          unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize;          unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize;
680            SetPos(0); // reset read position to begin of sample
681          RAMCache.pStart            = new int8_t[allocationsize];          RAMCache.pStart            = new int8_t[allocationsize];
682          RAMCache.Size              = Read(RAMCache.pStart, SampleCount) * this->FrameSize;          RAMCache.Size              = Read(RAMCache.pStart, SampleCount) * this->FrameSize;
683          RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;          RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
# Line 668  namespace { Line 715  namespace {
715          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;          if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
716          RAMCache.pStart = NULL;          RAMCache.pStart = NULL;
717          RAMCache.Size   = 0;          RAMCache.Size   = 0;
718            RAMCache.NullExtensionSize = 0;
719      }      }
720    
721      /** @brief Resize sample.      /** @brief Resize sample.
# Line 862  namespace { Line 910  namespace {
910                                  }                                  }
911    
912                                  // reverse the sample frames for backward playback                                  // reverse the sample frames for backward playback
913                                  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!
914                                        SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize);
915                              }                              }
916                          } while (samplestoread && readsamples);                          } while (samplestoread && readsamples);
917                          break;                          break;
# Line 1168  namespace { Line 1217  namespace {
1217          // if this is the first write in this sample, reset the          // if this is the first write in this sample, reset the
1218          // checksum calculator          // checksum calculator
1219          if (pCkData->GetPos() == 0) {          if (pCkData->GetPos() == 0) {
1220              crc.reset();              __resetCRC(crc);
1221          }          }
1222          if (GetSize() < SampleCount) throw Exception("Could not write sample data, current sample size to small");          if (GetSize() < SampleCount) throw Exception("Could not write sample data, current sample size to small");
1223          unsigned long res;          unsigned long res;
# Line 1178  namespace { Line 1227  namespace {
1227              res = Channels == 2 ? pCkData->Write(pBuffer, SampleCount << 1, 2) >> 1              res = Channels == 2 ? pCkData->Write(pBuffer, SampleCount << 1, 2) >> 1
1228                                  : pCkData->Write(pBuffer, SampleCount, 2);                                  : pCkData->Write(pBuffer, SampleCount, 2);
1229          }          }
1230          crc.update((unsigned char *)pBuffer, SampleCount * FrameSize);          __calculateCRC((unsigned char *)pBuffer, SampleCount * FrameSize, crc);
1231    
1232          // if this is the last write, update the checksum chunk in the          // if this is the last write, update the checksum chunk in the
1233          // file          // file
1234          if (pCkData->GetPos() == pCkData->GetSize()) {          if (pCkData->GetPos() == pCkData->GetSize()) {
1235              File* pFile = static_cast<File*>(GetParent());              File* pFile = static_cast<File*>(GetParent());
1236              pFile->SetSampleChecksum(this, crc.getValue());              pFile->SetSampleChecksum(this, __encodeCRC(crc));
1237          }          }
1238          return res;          return res;
1239      }      }
# Line 1512  namespace { Line 1561  namespace {
1561                                                       VelocityResponseDepth,                                                       VelocityResponseDepth,
1562                                                       VelocityResponseCurveScaling);                                                       VelocityResponseCurveScaling);
1563    
1564          curve_type_t curveType = ReleaseVelocityResponseCurve;          pVelocityReleaseTable = GetReleaseVelocityTable(
1565          uint8_t depth = ReleaseVelocityResponseDepth;                                      ReleaseVelocityResponseCurve,
1566                                        ReleaseVelocityResponseDepth
1567          // this models a strange behaviour or bug in GSt: two of the                                  );
1568          // velocity response curves for release time are not used even  
1569          // if specified, instead another curve is chosen.          pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve,
1570          if ((curveType == curve_type_nonlinear && depth == 0) ||                                                        VCFVelocityDynamicRange,
1571              (curveType == curve_type_special   && depth == 4)) {                                                        VCFVelocityScale,
1572              curveType = curve_type_nonlinear;                                                        VCFCutoffController);
             depth = 3;  
         }  
         pVelocityReleaseTable = GetVelocityTable(curveType, depth, 0);  
   
         curveType = VCFVelocityCurve;  
         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;  
         }  
         pVelocityCutoffTable = GetVelocityTable(curveType, depth,  
                                                 VCFCutoffController <= vcf_cutoff_ctrl_none2 ? VCFVelocityScale : 0);  
1573    
1574          SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360));          SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360));
1575          VelocityTable = 0;          VelocityTable = 0;
# Line 1566  namespace { Line 1598  namespace {
1598      }      }
1599    
1600      /**      /**
1601         * Updates the respective member variable and updates @c SampleAttenuation
1602         * which depends on this value.
1603         */
1604        void DimensionRegion::SetGain(int32_t gain) {
1605            DLS::Sampler::SetGain(gain);
1606            SampleAttenuation = pow(10.0, -Gain / (20.0 * 655360));
1607        }
1608    
1609        /**
1610       * Apply dimension region settings to the respective RIFF chunks. You       * Apply dimension region settings to the respective RIFF chunks. You
1611       * have to call File::Save() to make changes persistent.       * have to call File::Save() to make changes persistent.
1612       *       *
# Line 1573  namespace { Line 1614  namespace {
1614       * It will be called automatically when File::Save() was called.       * It will be called automatically when File::Save() was called.
1615       */       */
1616      void DimensionRegion::UpdateChunks() {      void DimensionRegion::UpdateChunks() {
         // check if wsmp is going to be created by  
         // DLS::Sampler::UpdateChunks  
         bool wsmp_created = !pParentList->GetSubChunk(CHUNK_ID_WSMP);  
   
1617          // first update base class's chunk          // first update base class's chunk
1618          DLS::Sampler::UpdateChunks();          DLS::Sampler::UpdateChunks();
1619    
# Line 1589  namespace { Line 1626  namespace {
1626    
1627          // make sure '3ewa' chunk exists          // make sure '3ewa' chunk exists
1628          RIFF::Chunk* _3ewa = pParentList->GetSubChunk(CHUNK_ID_3EWA);          RIFF::Chunk* _3ewa = pParentList->GetSubChunk(CHUNK_ID_3EWA);
1629          if (!_3ewa)  _3ewa = pParentList->AddSubChunk(CHUNK_ID_3EWA, 140);          if (!_3ewa) {
1630          else if (wsmp_created) {              File* pFile = (File*) GetParent()->GetParent()->GetParent();
1631              // make sure the chunk order is: wsmp, 3ewa              bool version3 = pFile->pVersion && pFile->pVersion->major == 3;
1632              pParentList->MoveSubChunk(_3ewa, 0);              _3ewa = pParentList->AddSubChunk(CHUNK_ID_3EWA, version3 ? 148 : 140);
1633          }          }
1634          pData = (uint8_t*) _3ewa->LoadChunkData();          pData = (uint8_t*) _3ewa->LoadChunkData();
1635    
# Line 1801  namespace { Line 1838  namespace {
1838    
1839          const uint16_t eg3depth = (EG3Depth >= 0) ? EG3Depth          const uint16_t eg3depth = (EG3Depth >= 0) ? EG3Depth
1840                                                    : uint16_t(((-EG3Depth) - 1) ^ 0xffff); /* binary complementary for negatives */                                                    : uint16_t(((-EG3Depth) - 1) ^ 0xffff); /* binary complementary for negatives */
1841          pData[116] = eg3depth;          store16(&pData[116], eg3depth);
1842    
1843          // next 2 bytes unknown          // next 2 bytes unknown
1844    
# Line 1860  namespace { Line 1897  namespace {
1897          }          }
1898      }      }
1899    
1900        double* DimensionRegion::GetReleaseVelocityTable(curve_type_t releaseVelocityResponseCurve, uint8_t releaseVelocityResponseDepth) {
1901            curve_type_t curveType = releaseVelocityResponseCurve;
1902            uint8_t depth = releaseVelocityResponseDepth;
1903            // this models a strange behaviour or bug in GSt: two of the
1904            // velocity response curves for release time are not used even
1905            // if specified, instead another curve is chosen.
1906            if ((curveType == curve_type_nonlinear && depth == 0) ||
1907                (curveType == curve_type_special   && depth == 4)) {
1908                curveType = curve_type_nonlinear;
1909                depth = 3;
1910            }
1911            return GetVelocityTable(curveType, depth, 0);
1912        }
1913    
1914        double* DimensionRegion::GetCutoffVelocityTable(curve_type_t vcfVelocityCurve,
1915                                                        uint8_t vcfVelocityDynamicRange,
1916                                                        uint8_t vcfVelocityScale,
1917                                                        vcf_cutoff_ctrl_t vcfCutoffController)
1918        {
1919            curve_type_t curveType = vcfVelocityCurve;
1920            uint8_t depth = vcfVelocityDynamicRange;
1921            // even stranger GSt: two of the velocity response curves for
1922            // filter cutoff are not used, instead another special curve
1923            // is chosen. This curve is not used anywhere else.
1924            if ((curveType == curve_type_nonlinear && depth == 0) ||
1925                (curveType == curve_type_special   && depth == 4)) {
1926                curveType = curve_type_special;
1927                depth = 5;
1928            }
1929            return GetVelocityTable(curveType, depth,
1930                                    (vcfCutoffController <= vcf_cutoff_ctrl_none2)
1931                                        ? vcfVelocityScale : 0);
1932        }
1933    
1934      // get the corresponding velocity table from the table map or create & calculate that table if it doesn't exist yet      // get the corresponding velocity table from the table map or create & calculate that table if it doesn't exist yet
1935      double* DimensionRegion::GetVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling)      double* DimensionRegion::GetVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling)
1936      {      {
# Line 2132  namespace { Line 2203  namespace {
2203          return pVelocityCutoffTable[MIDIKeyVelocity];          return pVelocityCutoffTable[MIDIKeyVelocity];
2204      }      }
2205    
2206        /**
2207         * Updates the respective member variable and the lookup table / cache
2208         * that depends on this value.
2209         */
2210        void DimensionRegion::SetVelocityResponseCurve(curve_type_t curve) {
2211            pVelocityAttenuationTable =
2212                GetVelocityTable(
2213                    curve, VelocityResponseDepth, VelocityResponseCurveScaling
2214                );
2215            VelocityResponseCurve = curve;
2216        }
2217    
2218        /**
2219         * Updates the respective member variable and the lookup table / cache
2220         * that depends on this value.
2221         */
2222        void DimensionRegion::SetVelocityResponseDepth(uint8_t depth) {
2223            pVelocityAttenuationTable =
2224                GetVelocityTable(
2225                    VelocityResponseCurve, depth, VelocityResponseCurveScaling
2226                );
2227            VelocityResponseDepth = depth;
2228        }
2229    
2230        /**
2231         * Updates the respective member variable and the lookup table / cache
2232         * that depends on this value.
2233         */
2234        void DimensionRegion::SetVelocityResponseCurveScaling(uint8_t scaling) {
2235            pVelocityAttenuationTable =
2236                GetVelocityTable(
2237                    VelocityResponseCurve, VelocityResponseDepth, scaling
2238                );
2239            VelocityResponseCurveScaling = scaling;
2240        }
2241    
2242        /**
2243         * Updates the respective member variable and the lookup table / cache
2244         * that depends on this value.
2245         */
2246        void DimensionRegion::SetReleaseVelocityResponseCurve(curve_type_t curve) {
2247            pVelocityReleaseTable = GetReleaseVelocityTable(curve, ReleaseVelocityResponseDepth);
2248            ReleaseVelocityResponseCurve = curve;
2249        }
2250    
2251        /**
2252         * Updates the respective member variable and the lookup table / cache
2253         * that depends on this value.
2254         */
2255        void DimensionRegion::SetReleaseVelocityResponseDepth(uint8_t depth) {
2256            pVelocityReleaseTable = GetReleaseVelocityTable(ReleaseVelocityResponseCurve, depth);
2257            ReleaseVelocityResponseDepth = depth;
2258        }
2259    
2260        /**
2261         * Updates the respective member variable and the lookup table / cache
2262         * that depends on this value.
2263         */
2264        void DimensionRegion::SetVCFCutoffController(vcf_cutoff_ctrl_t controller) {
2265            pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, VCFVelocityDynamicRange, VCFVelocityScale, controller);
2266            VCFCutoffController = controller;
2267        }
2268    
2269        /**
2270         * Updates the respective member variable and the lookup table / cache
2271         * that depends on this value.
2272         */
2273        void DimensionRegion::SetVCFVelocityCurve(curve_type_t curve) {
2274            pVelocityCutoffTable = GetCutoffVelocityTable(curve, VCFVelocityDynamicRange, VCFVelocityScale, VCFCutoffController);
2275            VCFVelocityCurve = curve;
2276        }
2277    
2278        /**
2279         * Updates the respective member variable and the lookup table / cache
2280         * that depends on this value.
2281         */
2282        void DimensionRegion::SetVCFVelocityDynamicRange(uint8_t range) {
2283            pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, range, VCFVelocityScale, VCFCutoffController);
2284            VCFVelocityDynamicRange = range;
2285        }
2286    
2287        /**
2288         * Updates the respective member variable and the lookup table / cache
2289         * that depends on this value.
2290         */
2291        void DimensionRegion::SetVCFVelocityScale(uint8_t scaling) {
2292            pVelocityCutoffTable = GetCutoffVelocityTable(VCFVelocityCurve, VCFVelocityDynamicRange, scaling, VCFCutoffController);
2293            VCFVelocityScale = scaling;
2294        }
2295    
2296      double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) {      double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) {
2297    
2298          // line-segment approximations of the 15 velocity curves          // line-segment approximations of the 15 velocity curves
# Line 2215  namespace { Line 2376  namespace {
2376    
2377          // Actual Loading          // Actual Loading
2378    
2379            if (!file->GetAutoLoad()) return;
2380    
2381          LoadDimensionRegions(rgnList);          LoadDimensionRegions(rgnList);
2382    
2383          RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK);          RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK);
# Line 2258  namespace { Line 2421  namespace {
2421              else              else
2422                  _3lnk->SetPos(44);                  _3lnk->SetPos(44);
2423    
2424              // load sample references              // load sample references (if auto loading is enabled)
2425              for (uint i = 0; i < DimensionRegions; i++) {              if (file->GetAutoLoad()) {
2426                  uint32_t wavepoolindex = _3lnk->ReadUint32();                  for (uint i = 0; i < DimensionRegions; i++) {
2427                  if (file->pWavePoolTable) pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);                      uint32_t wavepoolindex = _3lnk->ReadUint32();
2428                        if (file->pWavePoolTable) pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);
2429                    }
2430                    GetSample(); // load global region sample reference
2431              }              }
             GetSample(); // load global region sample reference  
2432          } else {          } else {
2433              DimensionRegions = 0;              DimensionRegions = 0;
2434              for (int i = 0 ; i < 8 ; i++) {              for (int i = 0 ; i < 8 ; i++) {
# Line 2302  namespace { Line 2467  namespace {
2467          // first update base class's chunks          // first update base class's chunks
2468          DLS::Region::UpdateChunks();          DLS::Region::UpdateChunks();
2469    
         File* pFile = (File*) GetParent()->GetParent();  
         bool version3 = pFile->pVersion && pFile->pVersion->major == 3;  
   
2470          // update dimension region's chunks          // update dimension region's chunks
2471          for (int i = 0; i < DimensionRegions; i++) {          for (int i = 0; i < DimensionRegions; i++) {
2472              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();  
2473          }          }
2474    
2475            File* pFile = (File*) GetParent()->GetParent();
2476            bool version3 = pFile->pVersion && pFile->pVersion->major == 3;
2477          const int iMaxDimensions =  version3 ? 8 : 5;          const int iMaxDimensions =  version3 ? 8 : 5;
2478          const int iMaxDimensionRegions = version3 ? 256 : 32;          const int iMaxDimensionRegions = version3 ? 256 : 32;
2479    
# Line 2382  namespace { Line 2538  namespace {
2538          }          }
2539      }      }
2540    
2541        void Region::SetKeyRange(uint16_t Low, uint16_t High) {
2542            // update KeyRange struct and make sure regions are in correct order
2543            DLS::Region::SetKeyRange(Low, High);
2544            // update Region key table for fast lookup
2545            ((gig::Instrument*)GetParent())->UpdateRegionKeyTable();
2546        }
2547    
2548      void Region::UpdateVelocityTable() {      void Region::UpdateVelocityTable() {
2549          // get velocity dimension's index          // get velocity dimension's index
2550          int veldim = -1;          int veldim = -1;
# Line 2764  namespace { Line 2927  namespace {
2927      }      }
2928    
2929    
2930    // *************** MidiRule ***************
2931    // *
2932    
2933    MidiRuleCtrlTrigger::MidiRuleCtrlTrigger(RIFF::Chunk* _3ewg) {
2934        _3ewg->SetPos(36);
2935        Triggers = _3ewg->ReadUint8();
2936        _3ewg->SetPos(40);
2937        ControllerNumber = _3ewg->ReadUint8();
2938        _3ewg->SetPos(46);
2939        for (int i = 0 ; i < Triggers ; i++) {
2940            pTriggers[i].TriggerPoint = _3ewg->ReadUint8();
2941            pTriggers[i].Descending = _3ewg->ReadUint8();
2942            pTriggers[i].VelSensitivity = _3ewg->ReadUint8();
2943            pTriggers[i].Key = _3ewg->ReadUint8();
2944            pTriggers[i].NoteOff = _3ewg->ReadUint8();
2945            pTriggers[i].Velocity = _3ewg->ReadUint8();
2946            pTriggers[i].OverridePedal = _3ewg->ReadUint8();
2947            _3ewg->ReadUint8();
2948        }
2949    }
2950    
2951    
2952  // *************** Instrument ***************  // *************** Instrument ***************
2953  // *  // *
2954    
2955      Instrument::Instrument(File* pFile, RIFF::List* insList, progress_t* pProgress) : DLS::Instrument((DLS::File*)pFile, insList) {      Instrument::Instrument(File* pFile, RIFF::List* insList, progress_t* pProgress) : DLS::Instrument((DLS::File*)pFile, insList) {
2956          static const DLS::Info::FixedStringLength fixedStringLengths[] = {          static const DLS::Info::string_length_t fixedStringLengths[] = {
2957              { CHUNK_ID_INAM, 64 },              { CHUNK_ID_INAM, 64 },
2958              { CHUNK_ID_ISFT, 12 },              { CHUNK_ID_ISFT, 12 },
2959              { 0, 0 }              { 0, 0 }
2960          };          };
2961          pInfo->FixedStringLengths = fixedStringLengths;          pInfo->SetFixedStringLengths(fixedStringLengths);
2962    
2963          // Initialization          // Initialization
2964          for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;          for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;
# Line 2785  namespace { Line 2969  namespace {
2969          PianoReleaseMode = false;          PianoReleaseMode = false;
2970          DimensionKeyRange.low = 0;          DimensionKeyRange.low = 0;
2971          DimensionKeyRange.high = 0;          DimensionKeyRange.high = 0;
2972            pMidiRules = new MidiRule*[3];
2973            pMidiRules[0] = NULL;
2974    
2975          // Loading          // Loading
2976          RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART);          RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART);
# Line 2799  namespace { Line 2985  namespace {
2985                  PianoReleaseMode       = dimkeystart & 0x01;                  PianoReleaseMode       = dimkeystart & 0x01;
2986                  DimensionKeyRange.low  = dimkeystart >> 1;                  DimensionKeyRange.low  = dimkeystart >> 1;
2987                  DimensionKeyRange.high = _3ewg->ReadUint8();                  DimensionKeyRange.high = _3ewg->ReadUint8();
2988    
2989                    if (_3ewg->GetSize() > 32) {
2990                        // read MIDI rules
2991                        int i = 0;
2992                        _3ewg->SetPos(32);
2993                        uint8_t id1 = _3ewg->ReadUint8();
2994                        uint8_t id2 = _3ewg->ReadUint8();
2995    
2996                        if (id1 == 4 && id2 == 16) {
2997                            pMidiRules[i++] = new MidiRuleCtrlTrigger(_3ewg);
2998                        }
2999                        //TODO: all the other types of rules
3000    
3001                        pMidiRules[i] = NULL;
3002                    }
3003              }              }
3004          }          }
3005    
3006          if (!pRegions) pRegions = new RegionList;          if (pFile->GetAutoLoad()) {
3007          RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);              if (!pRegions) pRegions = new RegionList;
3008          if (lrgn) {              RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
3009              RIFF::List* rgn = lrgn->GetFirstSubList();              if (lrgn) {
3010              while (rgn) {                  RIFF::List* rgn = lrgn->GetFirstSubList();
3011                  if (rgn->GetListType() == LIST_TYPE_RGN) {                  while (rgn) {
3012                      __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);                      if (rgn->GetListType() == LIST_TYPE_RGN) {
3013                      pRegions->push_back(new Region(this, rgn));                          __notify_progress(pProgress, (float) pRegions->size() / (float) Regions);
3014                            pRegions->push_back(new Region(this, rgn));
3015                        }
3016                        rgn = lrgn->GetNextSubList();
3017                  }                  }
3018                  rgn = lrgn->GetNextSubList();                  // Creating Region Key Table for fast lookup
3019                    UpdateRegionKeyTable();
3020              }              }
             // Creating Region Key Table for fast lookup  
             UpdateRegionKeyTable();  
3021          }          }
3022    
3023          __notify_progress(pProgress, 1.0f); // notify done          __notify_progress(pProgress, 1.0f); // notify done
3024      }      }
3025    
3026      void Instrument::UpdateRegionKeyTable() {      void Instrument::UpdateRegionKeyTable() {
3027            for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;
3028          RegionList::iterator iter = pRegions->begin();          RegionList::iterator iter = pRegions->begin();
3029          RegionList::iterator end  = pRegions->end();          RegionList::iterator end  = pRegions->end();
3030          for (; iter != end; ++iter) {          for (; iter != end; ++iter) {
# Line 2832  namespace { Line 3036  namespace {
3036      }      }
3037    
3038      Instrument::~Instrument() {      Instrument::~Instrument() {
3039            delete[] pMidiRules;
3040      }      }
3041    
3042      /**      /**
# Line 2888  namespace { Line 3093  namespace {
3093       *             there is no Region defined for the given \a Key       *             there is no Region defined for the given \a Key
3094       */       */
3095      Region* Instrument::GetRegion(unsigned int Key) {      Region* Instrument::GetRegion(unsigned int Key) {
3096          if (!pRegions || !pRegions->size() || Key > 127) return NULL;          if (!pRegions || pRegions->empty() || Key > 127) return NULL;
3097          return RegionKeyTable[Key];          return RegionKeyTable[Key];
3098    
3099          /*for (int i = 0; i < Regions; i++) {          /*for (int i = 0; i < Regions; i++) {
# Line 2946  namespace { Line 3151  namespace {
3151          UpdateRegionKeyTable();          UpdateRegionKeyTable();
3152      }      }
3153    
3154        /**
3155         * Returns a MIDI rule of the instrument.
3156         *
3157         * The list of MIDI rules, at least in gig v3, always contains at
3158         * most two rules. The second rule can only be the DEF filter
3159         * (which currently isn't supported by libgig).
3160         *
3161         * @param i - MIDI rule number
3162         * @returns   pointer address to MIDI rule number i or NULL if there is none
3163         */
3164        MidiRule* Instrument::GetMidiRule(int i) {
3165            return pMidiRules[i];
3166        }
3167    
3168    
3169  // *************** Group ***************  // *************** Group ***************
# Line 3071  namespace { Line 3289  namespace {
3289  // *************** File ***************  // *************** File ***************
3290  // *  // *
3291    
3292      // File version 2.0, 1998-06-28      /// Reflects Gigasampler file format version 2.0 (1998-06-28).
3293      const DLS::version_t File::VERSION_2 = {      const DLS::version_t File::VERSION_2 = {
3294          0, 2, 19980628 & 0xffff, 19980628 >> 16          0, 2, 19980628 & 0xffff, 19980628 >> 16
3295      };      };
3296    
3297      // File version 3.0, 2003-03-31      /// Reflects Gigasampler file format version 3.0 (2003-03-31).
3298      const DLS::version_t File::VERSION_3 = {      const DLS::version_t File::VERSION_3 = {
3299          0, 3, 20030331 & 0xffff, 20030331 >> 16          0, 3, 20030331 & 0xffff, 20030331 >> 16
3300      };      };
3301    
3302      const DLS::Info::FixedStringLength File::FixedStringLengths[] = {      static const DLS::Info::string_length_t _FileFixedStringLengths[] = {
3303          { CHUNK_ID_IARL, 256 },          { CHUNK_ID_IARL, 256 },
3304          { CHUNK_ID_IART, 128 },          { CHUNK_ID_IART, 128 },
3305          { CHUNK_ID_ICMS, 128 },          { CHUNK_ID_ICMS, 128 },
# Line 3103  namespace { Line 3321  namespace {
3321      };      };
3322    
3323      File::File() : DLS::File() {      File::File() : DLS::File() {
3324            bAutoLoad = true;
3325          *pVersion = VERSION_3;          *pVersion = VERSION_3;
3326          pGroups = NULL;          pGroups = NULL;
3327          pInfo->FixedStringLengths = FixedStringLengths;          pInfo->SetFixedStringLengths(_FileFixedStringLengths);
3328          pInfo->ArchivalLocation = String(256, ' ');          pInfo->ArchivalLocation = String(256, ' ');
3329    
3330          // add some mandatory chunks to get the file chunks in right          // add some mandatory chunks to get the file chunks in right
# Line 3118  namespace { Line 3337  namespace {
3337      }      }
3338    
3339      File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) {      File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) {
3340            bAutoLoad = true;
3341          pGroups = NULL;          pGroups = NULL;
3342          pInfo->FixedStringLengths = FixedStringLengths;          pInfo->SetFixedStringLengths(_FileFixedStringLengths);
3343      }      }
3344    
3345      File::~File() {      File::~File() {
# Line 3187  namespace { Line 3407  namespace {
3407          pSamples->erase(iter);          pSamples->erase(iter);
3408          delete pSample;          delete pSample;
3409    
3410            SampleList::iterator tmp = SamplesIterator;
3411          // remove all references to the sample          // remove all references to the sample
3412          for (Instrument* instrument = GetFirstInstrument() ; instrument ;          for (Instrument* instrument = GetFirstInstrument() ; instrument ;
3413               instrument = GetNextInstrument()) {               instrument = GetNextInstrument()) {
# Line 3201  namespace { Line 3422  namespace {
3422                  }                  }
3423              }              }
3424          }          }
3425            SamplesIterator = tmp; // restore iterator
3426      }      }
3427    
3428      void File::LoadSamples() {      void File::LoadSamples() {
# Line 3291  namespace { Line 3513  namespace {
3513              progress_t subprogress;              progress_t subprogress;
3514              __divide_progress(pProgress, &subprogress, 3.0f, 0.0f); // randomly schedule 33% for this subtask              __divide_progress(pProgress, &subprogress, 3.0f, 0.0f); // randomly schedule 33% for this subtask
3515              __notify_progress(&subprogress, 0.0f);              __notify_progress(&subprogress, 0.0f);
3516              GetFirstSample(&subprogress); // now force all samples to be loaded              if (GetAutoLoad())
3517                    GetFirstSample(&subprogress); // now force all samples to be loaded
3518              __notify_progress(&subprogress, 1.0f);              __notify_progress(&subprogress, 1.0f);
3519    
3520              // instrument loading subtask              // instrument loading subtask
# Line 3698  namespace { Line 3921  namespace {
3921          }          }
3922      }      }
3923    
3924        /**
3925         * Enable / disable automatic loading. By default this properyt is
3926         * enabled and all informations are loaded automatically. However
3927         * loading all Regions, DimensionRegions and especially samples might
3928         * take a long time for large .gig files, and sometimes one might only
3929         * be interested in retrieving very superficial informations like the
3930         * amount of instruments and their names. In this case one might disable
3931         * automatic loading to avoid very slow response times.
3932         *
3933         * @e CAUTION: by disabling this property many pointers (i.e. sample
3934         * references) and informations will have invalid or even undefined
3935         * data! This feature is currently only intended for retrieving very
3936         * superficial informations in a very fast way. Don't use it to retrieve
3937         * details like synthesis informations or even to modify .gig files!
3938         */
3939        void File::SetAutoLoad(bool b) {
3940            bAutoLoad = b;
3941        }
3942    
3943        /**
3944         * Returns whether automatic loading is enabled.
3945         * @see SetAutoLoad()
3946         */
3947        bool File::GetAutoLoad() {
3948            return bAutoLoad;
3949        }
3950    
3951    
3952    
3953  // *************** Exception ***************  // *************** Exception ***************
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