/[svn]/linuxsampler/trunk/src/engines/gig/InstrumentResourceManager.cpp

Diff of /linuxsampler/trunk/src/engines/gig/InstrumentResourceManager.cpp

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-revision 354 by schoenebeck,
Sat Jan 29 15:17:59 2005 UTC
+revision 1797 by persson,
Thu Dec  4 19:33:13 2008 UTC
 Line 3
   *   LinuxSampler - modular, streaming capable sampler                     *
   *                                                                         *
   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
+  *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
   *                                                                         *
   *   This program is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU General Public License as published by  *
-Line 24
+Line 25
  #include "InstrumentResourceManager.h"
+ #include "../../common/global_private.h"
+ #include "../../plugins/InstrumentEditorFactory.h"
+ // We need to know the maximum number of sample points which are going to
+ // be processed for each render cycle of the audio output driver, to know
+ // how much initial sample points we need to cache into RAM. If the given
+ // sampler channel does not have an audio output device assigned yet
+ // though, we simply use this default value.
+ #define GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE     128
  namespace LinuxSampler { namespace gig {
+     // data stored as long as an instrument resource exists
+     struct instr_entry_t {
+         InstrumentManager::instrument_id_t ID;
+         ::gig::File*                       pGig;
+         uint                               MaxSamplesPerCycle; ///< if some engine requests an already allocated instrument with a higher value, we have to reallocate the instrument
+     };
+     // some data needed for the libgig callback function
+     struct progress_callback_arg_t {
+         InstrumentResourceManager*          pManager;
+         InstrumentManager::instrument_id_t* pInstrumentKey;
+     };
+     // we use this to react on events concerning an instrument on behalf of an instrument editor
+     class InstrumentEditorProxy : public InstrumentConsumer {
+     public:
+         virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {
+             //TODO: inform the instrument editor about the pending update
+         }
+         virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
+             //TODO:: inform the instrument editor about finished update
+         }
+         virtual void OnResourceProgress(float fProgress) {
+             //TODO: inform the instrument editor about the progress of an update
+         }
+         // the instrument we borrowed on behalf of the editor
+         ::gig::Instrument* pInstrument;
+         // the instrument editor we work on behalf
+         InstrumentEditor* pEditor;
+     };
+     /**
+      * Callback function which will be called by libgig during loading of
+      * instruments to inform about the current progress. Or to be more
+      * specific; it will be called during the GetInstrument() call.
+      *
+      * @param pProgress - contains current progress value, pointer to the
+      *                    InstrumentResourceManager instance and
+      *                    instrument ID
+      */
+     void InstrumentResourceManager::OnInstrumentLoadingProgress(::gig::progress_t* pProgress) {
+         dmsg(7,("gig::InstrumentResourceManager: progress %f%", pProgress->factor));
+         progress_callback_arg_t* pArg = static_cast<progress_callback_arg_t*>(pProgress->custom);
+         // we randomly schedule 90% for the .gig file loading and the remaining 10% later for sample caching
+         const float localProgress = 0.9f * pProgress->factor;
+         pArg->pManager->DispatchResourceProgressEvent(*pArg->pInstrumentKey, localProgress);
+     }
+     std::vector<InstrumentResourceManager::instrument_id_t> InstrumentResourceManager::Instruments() {
+         return Entries();
+     }
+     InstrumentManager::mode_t InstrumentResourceManager::GetMode(const instrument_id_t& ID) {
+         return static_cast<InstrumentManager::mode_t>(AvailabilityMode(ID));
+     }
+     void InstrumentResourceManager::SetMode(const instrument_id_t& ID, InstrumentManager::mode_t Mode) {
+         dmsg(2,("gig::InstrumentResourceManager: setting mode for %s (Index=%d) to %d\n",ID.FileName.c_str(),ID.Index,Mode));
+         SetAvailabilityMode(ID, static_cast<ResourceManager<InstrumentManager::instrument_id_t, ::gig::Instrument>::mode_t>(Mode));
+     }
+     String InstrumentResourceManager::GetInstrumentName(instrument_id_t ID) {
+         Lock();
+         ::gig::Instrument* pInstrument = Resource(ID, false);
+         String res = (pInstrument) ? pInstrument->pInfo->Name : "";
+         Unlock();
+         return res;
+     }
+     String InstrumentResourceManager::GetInstrumentDataStructureName(instrument_id_t ID) {
+         return ::gig::libraryName();
+     }
+     String InstrumentResourceManager::GetInstrumentDataStructureVersion(instrument_id_t ID) {
+         return ::gig::libraryVersion();
+     }
+     std::vector<InstrumentResourceManager::instrument_id_t> InstrumentResourceManager::GetInstrumentFileContent(String File) throw (InstrumentManagerException) {
+         ::RIFF::File* riff = NULL;
+         ::gig::File*  gig  = NULL;
+         try {
+             std::vector<instrument_id_t> result;
+             riff = new ::RIFF::File(File);
+             gig  = new ::gig::File(riff);
+             gig->SetAutoLoad(false); // avoid time consuming samples scanning
+             for (int i = 0; gig->GetInstrument(i); i++) {
+                 instrument_id_t id;
+                 id.FileName = File;
+                 id.Index    = i;
+                 result.push_back(id);
+             }
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             return result;
+         } catch (::RIFF::Exception e) {
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             throw InstrumentManagerException(e.Message);
+         } catch (...) {
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             throw InstrumentManagerException("Unknown exception while trying to parse '" + File + "'");
+         }
+     }
+     InstrumentResourceManager::instrument_info_t InstrumentResourceManager::GetInstrumentInfo(instrument_id_t ID) throw (InstrumentManagerException) {
+         Lock();
+         ::gig::Instrument* pInstrument = Resource(ID, false);
+         bool loaded = (pInstrument != NULL);
+         if (!loaded) Unlock();
+         ::RIFF::File* riff = NULL;
+         ::gig::File*  gig  = NULL;
+         try {
+             if(!loaded) {
+                 riff = new ::RIFF::File(ID.FileName);
+                 gig  = new ::gig::File(riff);
+                 gig->SetAutoLoad(false); // avoid time consuming samples scanning
+                 pInstrument = gig->GetInstrument(ID.Index);
+             }
+             if (!pInstrument) throw InstrumentManagerException("There is no instrument " + ToString(ID.Index) + " in " + ID.FileName);
+             instrument_info_t info;
+             for (int i = 0; i < 128; i++) { info.KeyBindings[i] = info.KeySwitchBindings[i] = 0; }
+             ::gig::File* pFile = (::gig::File*) pInstrument->GetParent();
+             if (pFile->pVersion) {
+                 info.FormatVersion = ToString(pFile->pVersion->major);
+                 info.Product = pFile->pInfo->Product;
+                 info.Artists = pFile->pInfo->Artists;
+             }
+             info.InstrumentName = pInstrument->pInfo->Name;
+             ::gig::Region* pRegion = pInstrument->GetFirstRegion();
+             while (pRegion) {
+                 int low = pRegion->KeyRange.low;
+                 int high = pRegion->KeyRange.high;
+                 if (low < 0 || low > 127 || high < 0 || high > 127 || low > high) {
+                     std::cerr << "Invalid key range: " << low << " - " << high << std::endl;
+                 } else {
+                     for (int i = low; i <= high; i++) info.KeyBindings[i] = 1;
+                 }
+                 pRegion = pInstrument->GetNextRegion();
+             }
+             if (loaded) { // retrieve keyswitching only if the instrument is fully loaded.
+                 // only return keyswitch range if keyswitching is used
+                 bool hasKeyswitches = false;
+                 for (::gig::Region* pRegion = pInstrument->GetFirstRegion() ;
+                      pRegion && !hasKeyswitches ;
+                      pRegion = pInstrument->GetNextRegion()) {
+                     for (int i = 0 ; i < pRegion->Dimensions ; i++) {
+                         if (pRegion->pDimensionDefinitions[i].dimension == ::gig::dimension_keyboard) {
+                             hasKeyswitches = true;
+                             break;
+                         }
+                     }
+                 }
+                 if (hasKeyswitches) {
+                     int low = pInstrument->DimensionKeyRange.low;
+                     int high = pInstrument->DimensionKeyRange.high;
+                     if (low < 0 || low > 127 || high < 0 || high > 127 || low > high) {
+                         std::cerr << "Invalid keyswitch range: " << low << " - " << high << std::endl;
+                     } else {
+                         for (int i = low; i <= high; i++) info.KeySwitchBindings[i] = 1;
+                     }
+                 }
+             }
+             if (loaded) Unlock();
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             return info;
+         } catch (::RIFF::Exception e) {
+             if (loaded) Unlock();
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             throw InstrumentManagerException(e.Message);
+         } catch (...) {
+             if (loaded) Unlock();
+             if (gig)  delete gig;
+             if (riff) delete riff;
+             throw InstrumentManagerException("Unknown exception while trying to parse '" + ID.FileName + "'");
+         }
+     }
+     void InstrumentResourceManager::LaunchInstrumentEditor(instrument_id_t ID) throw (InstrumentManagerException) {
+         const String sDataType    = GetInstrumentDataStructureName(ID);
+         const String sDataVersion = GetInstrumentDataStructureVersion(ID);
+         // find instrument editors capable to handle given instrument
+         std::vector<String> vEditors =
+             InstrumentEditorFactory::MatchingEditors(sDataType, sDataVersion);
+         if (!vEditors.size())
+             throw InstrumentManagerException(
+                 "There is no instrument editor capable to handle this instrument"
+             );
+         // simply use the first editor in the result set
+         dmsg(1,("Found matching editor '%s' for instrument ('%s', %d) having data structure ('%s','%s')\n",
+             vEditors[0].c_str(), ID.FileName.c_str(), ID.Index, sDataType.c_str(), sDataVersion.c_str()));
+         InstrumentEditor* pEditor = InstrumentEditorFactory::Create(vEditors[0]);
+         // register for receiving notifications from the instrument editor
+         pEditor->AddListener(this);
+         // create a proxy that reacts on notification on behalf of the editor
+         InstrumentEditorProxy* pProxy = new InstrumentEditorProxy;
+         // borrow the instrument on behalf of the instrument editor
+         ::gig::Instrument* pInstrument = Borrow(ID, pProxy);
+         // remember the proxy and instrument for this instrument editor
+         pProxy->pInstrument = pInstrument;
+         pProxy->pEditor     = pEditor;
+         InstrumentEditorProxiesMutex.Lock();
+         InstrumentEditorProxies.add(pProxy);
+         InstrumentEditorProxiesMutex.Unlock();
+         // launch the instrument editor for the given instrument
+         pEditor->Launch(pInstrument, sDataType, sDataVersion);
+         // register the instrument editor as virtual MIDI device as well ...
+         VirtualMidiDevice* pVirtualMidiDevice =
+             dynamic_cast<VirtualMidiDevice*>(pEditor);
+         if (!pVirtualMidiDevice) {
+             std::cerr << "Instrument editor not a virtual MIDI device\n" << std::flush;
+             return;
+         }
+         // NOTE: for now connect the virtual MIDI keyboard of the instrument editor (if any) with all engine channels that have the same instrument as the editor was opened for ( other ideas ? )
+         Lock();
+         std::set<gig::EngineChannel*> engineChannels =
+             GetEngineChannelsUsing(pInstrument, false/*don't lock again*/);
+         std::set<gig::EngineChannel*>::iterator iter = engineChannels.begin();
+         std::set<gig::EngineChannel*>::iterator end  = engineChannels.end();
+         for (; iter != end; ++iter) (*iter)->Connect(pVirtualMidiDevice);
+         Unlock();
+     }
+     /**
+      * Will be called by the respective instrument editor once it left its
+      * Main() loop. That way we can handle cleanup before its thread finally
+      * dies.
+      *
+      * @param pSender - instrument editor that stops execution
+      */
+     void InstrumentResourceManager::OnInstrumentEditorQuit(InstrumentEditor* pSender) {
+         dmsg(1,("InstrumentResourceManager: instrument editor quit, doing cleanup\n"));
+         ::gig::Instrument* pInstrument = NULL;
+         InstrumentEditorProxy* pProxy  = NULL;
+         int iProxyIndex                = -1;
+         // first find the editor proxy entry for this editor
+         InstrumentEditorProxiesMutex.Lock();
+         for (int i = 0; i < InstrumentEditorProxies.size(); i++) {
+             InstrumentEditorProxy* pCurProxy =
+                 dynamic_cast<InstrumentEditorProxy*>(
+                     InstrumentEditorProxies[i]
+                 );
+             if (pCurProxy->pEditor == pSender) {
+                 pProxy      = pCurProxy;
+                 iProxyIndex = i;
+                 pInstrument = pCurProxy->pInstrument;
+             }
+         }
+         InstrumentEditorProxiesMutex.Unlock();
+         if (!pProxy) {
+             std::cerr << "Eeeek, could not find instrument editor proxy, "
+                          "this is a bug!\n" << std::flush;
+             return;
+         }
+         // now unregister editor as not being available as a virtual MIDI device anymore
+         VirtualMidiDevice* pVirtualMidiDevice =
+             dynamic_cast<VirtualMidiDevice*>(pSender);
+         if (pVirtualMidiDevice) {
+             Lock();
+             // NOTE: see note in LaunchInstrumentEditor()
+             std::set<gig::EngineChannel*> engineChannels =
+                 GetEngineChannelsUsing(pInstrument, false/*don't lock again*/);
+             std::set<gig::EngineChannel*>::iterator iter = engineChannels.begin();
+             std::set<gig::EngineChannel*>::iterator end  = engineChannels.end();
+             for (; iter != end; ++iter) (*iter)->Disconnect(pVirtualMidiDevice);
+             Unlock();
+         } else {
+             std::cerr << "Could not unregister editor as not longer acting as "
+                          "virtual MIDI device. Wasn't it registered?\n"
+                       << std::flush;
+         }
+         // finally delete proxy entry and hand back instrument
+         if (pInstrument) {
+             InstrumentEditorProxiesMutex.Lock();
+             InstrumentEditorProxies.remove(iProxyIndex);
+             InstrumentEditorProxiesMutex.Unlock();
+             HandBack(pInstrument, pProxy);
+             delete pProxy;
+         }
+         // Note that we don't need to free the editor here. As it
+         // derives from Thread, it will delete itself when the thread
+         // dies.
+     }
+ #if 0 // currently unused :
+     /**
+      * Try to inform the respective instrument editor(s), that a note on
+      * event just occured. This method is called by the MIDI thread. If any
+      * obstacles are in the way (e.g. if a wait for an unlock would be
+      * required) we give up immediately, since the RT safeness of the MIDI
+      * thread has absolute priority.
+      */
+     void InstrumentResourceManager::TrySendNoteOnToEditors(uint8_t Key, uint8_t Velocity, ::gig::Instrument* pInstrument) {
+         const bool bGotLock = InstrumentEditorProxiesMutex.Trylock(); // naively assumes RT safe implementation
+         if (!bGotLock) return; // hell, forget it, not worth the hassle
+         for (int i = 0; i < InstrumentEditorProxies.size(); i++) {
+             InstrumentEditorProxy* pProxy =
+                 dynamic_cast<InstrumentEditorProxy*>(
+                     InstrumentEditorProxies[i]
+                 );
+             if (pProxy->pInstrument == pInstrument)
+                 pProxy->pEditor->SendNoteOnToDevice(Key, Velocity);
+         }
+         InstrumentEditorProxiesMutex.Unlock(); // naively assumes RT safe implementation
+     }
+     /**
+      * Try to inform the respective instrument editor(s), that a note off
+      * event just occured. This method is called by the MIDI thread. If any
+      * obstacles are in the way (e.g. if a wait for an unlock would be
+      * required) we give up immediately, since the RT safeness of the MIDI
+      * thread has absolute priority.
+      */
+     void InstrumentResourceManager::TrySendNoteOffToEditors(uint8_t Key, uint8_t Velocity, ::gig::Instrument* pInstrument) {
+         const bool bGotLock = InstrumentEditorProxiesMutex.Trylock(); // naively assumes RT safe implementation
+         if (!bGotLock) return; // hell, forget it, not worth the hassle
+         for (int i = 0; i < InstrumentEditorProxies.size(); i++) {
+             InstrumentEditorProxy* pProxy =
+                 dynamic_cast<InstrumentEditorProxy*>(
+                     InstrumentEditorProxies[i]
+                 );
+             if (pProxy->pInstrument == pInstrument)
+                 pProxy->pEditor->SendNoteOffToDevice(Key, Velocity);
+         }
+         InstrumentEditorProxiesMutex.Unlock(); // naively assumes RT safe implementation
+     }
+ #endif // unused
+     void InstrumentResourceManager::OnSamplesToBeRemoved(std::set<void*> Samples, InstrumentEditor* pSender) {
+         if (Samples.empty()) {
+             std::cerr << "gig::InstrumentResourceManager: WARNING, "
+                          "OnSamplesToBeRemoved() called with empty list, this "
+                          "is a bug!\n" << std::flush;
+             return;
+         }
+         // TODO: ATM we assume here that all samples are from the same file
+         ::gig::Sample* pFirstSample = (::gig::Sample*) *Samples.begin();
+         ::gig::File* pCriticalFile = dynamic_cast< ::gig::File*>(pFirstSample->GetParent());
+         // completely suspend all engines that use that same file
+         SuspendEnginesUsing(pCriticalFile);
+     }
+     void InstrumentResourceManager::OnSamplesRemoved(InstrumentEditor* pSender) {
+         // resume all previously, completely suspended engines
+         // (we don't have to un-cache the removed samples here, since that is
+         // automatically done by the gig::Sample destructor)
+         ResumeAllEngines();
+     }
+     void InstrumentResourceManager::OnDataStructureToBeChanged(void* pStruct, String sStructType, InstrumentEditor* pSender) {
+         //TODO: remove code duplication
+         if (sStructType == "gig::File") {
+             // completely suspend all engines that use that file
+             ::gig::File* pFile = (::gig::File*) pStruct;
+             SuspendEnginesUsing(pFile);
+         } else if (sStructType == "gig::Instrument") {
+             // completely suspend all engines that use that instrument
+             ::gig::Instrument* pInstrument = (::gig::Instrument*) pStruct;
+             SuspendEnginesUsing(pInstrument);
+         } else if (sStructType == "gig::Region") {
+             // only advice the engines to suspend the given region, so they'll
+             // only ignore that region (and probably already other suspended
+             // ones), but beside that continue normal playback
+             ::gig::Region* pRegion = (::gig::Region*) pStruct;
+             ::gig::Instrument* pInstrument =
+                 (::gig::Instrument*) pRegion->GetParent();
+             Lock();
+             std::set<gig::Engine*> engines =
+                 GetEnginesUsing(pInstrument, false/*don't lock again*/);
+             std::set<gig::Engine*>::iterator iter = engines.begin();
+             std::set<gig::Engine*>::iterator end  = engines.end();
+             for (; iter != end; ++iter) (*iter)->Suspend(pRegion);
+             Unlock();
+         } else if (sStructType == "gig::DimensionRegion") {
+             // only advice the engines to suspend the given DimensionRegions's
+             // parent region, so they'll only ignore that region (and probably
+             // already other suspended ones), but beside that continue normal
+             // playback
+             ::gig::DimensionRegion* pDimReg =
+                 (::gig::DimensionRegion*) pStruct;
+             ::gig::Region* pRegion = pDimReg->GetParent();
+             ::gig::Instrument* pInstrument =
+                 (::gig::Instrument*) pRegion->GetParent();
+             Lock();
+             std::set<gig::Engine*> engines =
+                 GetEnginesUsing(pInstrument, false/*don't lock again*/);
+             std::set<gig::Engine*>::iterator iter = engines.begin();
+             std::set<gig::Engine*>::iterator end  = engines.end();
+             for (; iter != end; ++iter) (*iter)->Suspend(pRegion);
+             Unlock();
+         } else {
+             std::cerr << "gig::InstrumentResourceManager: ERROR, unknown data "
+                          "structure '" << sStructType << "' requested to be "
+                          "suspended by instrument editor. This is a bug!\n"
+                       << std::flush;
+             //TODO: we should inform the instrument editor that something seriously went wrong
+         }
+     }
+     void InstrumentResourceManager::OnDataStructureChanged(void* pStruct, String sStructType, InstrumentEditor* pSender) {
+         //TODO: remove code duplication
+         if (sStructType == "gig::File") {
+             // resume all previously suspended engines
+             ResumeAllEngines();
+         } else if (sStructType == "gig::Instrument") {
+             // resume all previously suspended engines
+             ResumeAllEngines();
+         } else if (sStructType == "gig::Region") {
+             // advice the engines to resume the given region, that is to
+             // using it for playback again
+             ::gig::Region* pRegion = (::gig::Region*) pStruct;
+             ::gig::Instrument* pInstrument =
+                 (::gig::Instrument*) pRegion->GetParent();
+             Lock();
+             std::set<gig::Engine*> engines =
+                 GetEnginesUsing(pInstrument, false/*don't lock again*/);
+             std::set<gig::Engine*>::iterator iter = engines.begin();
+             std::set<gig::Engine*>::iterator end  = engines.end();
+             for (; iter != end; ++iter) (*iter)->Resume(pRegion);
+             Unlock();
+         } else if (sStructType == "gig::DimensionRegion") {
+             // advice the engines to resume the given DimensionRegion's parent
+             // region, that is to using it for playback again
+             ::gig::DimensionRegion* pDimReg =
+                 (::gig::DimensionRegion*) pStruct;
+             ::gig::Region* pRegion = pDimReg->GetParent();
+             ::gig::Instrument* pInstrument =
+                 (::gig::Instrument*) pRegion->GetParent();
+             Lock();
+             std::set<gig::Engine*> engines =
+                 GetEnginesUsing(pInstrument, false/*don't lock again*/);
+             std::set<gig::Engine*>::iterator iter = engines.begin();
+             std::set<gig::Engine*>::iterator end  = engines.end();
+             for (; iter != end; ++iter) (*iter)->Resume(pRegion);
+             Unlock();
+         } else {
+             std::cerr << "gig::InstrumentResourceManager: ERROR, unknown data "
+                          "structure '" << sStructType << "' requested to be "
+                          "resumed by instrument editor. This is a bug!\n"
+                       << std::flush;
+             //TODO: we should inform the instrument editor that something seriously went wrong
+         }
+     }
+     void InstrumentResourceManager::OnSampleReferenceChanged(void* pOldSample, void* pNewSample, InstrumentEditor* pSender) {
+         // uncache old sample in case it's not used by anybody anymore
+         if (pOldSample) {
+             Lock();
+             ::gig::Sample* pSample = (::gig::Sample*) pOldSample;
+             ::gig::File* pFile = (::gig::File*) pSample->GetParent();
+             std::vector< ::gig::Instrument*> instruments =
+                 GetInstrumentsCurrentlyUsedOf(pFile, false/*don't lock again*/);
+             for (int i = 0; i < instruments.size(); i++)
+                 if (!SampleReferencedByInstrument(pSample, instruments[i]))
+                     UncacheInitialSamples(pSample);
+             Unlock();
+         }
+         // make sure new sample reference is cached
+         if (pNewSample) {
+             Lock();
+             ::gig::Sample* pSample = (::gig::Sample*) pNewSample;
+             ::gig::File* pFile = (::gig::File*) pSample->GetParent();
+             // get all engines that use that same gig::File
+             std::set<gig::Engine*> engines = GetEnginesUsing(pFile, false/*don't lock again*/);
+             std::set<gig::Engine*>::iterator iter = engines.begin();
+             std::set<gig::Engine*>::iterator end  = engines.end();
+             for (; iter != end; ++iter)
+                 CacheInitialSamples(pSample, *iter);
+             Unlock();
+         }
+     }
      ::gig::Instrument* InstrumentResourceManager::Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg) {
-         // get gig file from inernal gig file manager
+         // get gig file from internal gig file manager
-         ::gig::File* pGig = Gigs.Borrow(Key.FileName, (GigConsumer*) Key.iInstrument); // conversion kinda hackish :/
+         ::gig::File* pGig = Gigs.Borrow(Key.FileName, (GigConsumer*) Key.Index); // conversion kinda hackish :/
+         // we pass this to the progress callback mechanism of libgig
+         progress_callback_arg_t callbackArg;
+         callbackArg.pManager       = this;
+         callbackArg.pInstrumentKey = &Key;
+         ::gig::progress_t progress;
+         progress.callback = OnInstrumentLoadingProgress;
+         progress.custom   = &callbackArg;
-         dmsg(1,("Loading gig instrument..."));
+         dmsg(1,("Loading gig instrument ('%s',%d)...",Key.FileName.c_str(),Key.Index));
-         ::gig::Instrument* pInstrument = pGig->GetInstrument(Key.iInstrument);
+         ::gig::Instrument* pInstrument = pGig->GetInstrument(Key.Index, &progress);
          if (!pInstrument) {
              std::stringstream msg;
-             msg << "There's no instrument with index " << Key.iInstrument << ".";
+             msg << "There's no instrument with index " << Key.Index << ".";
-             throw InstrumentResourceManagerException(msg.str());
+             throw InstrumentManagerException(msg.str());
          }
          pGig->GetFirstSample(); // just to force complete instrument loading
          dmsg(1,("OK\n"));
          // cache initial samples points (for actually needed samples)
          dmsg(1,("Caching initial samples..."));
+         uint iRegion = 0; // just for progress calculation
          ::gig::Region* pRgn = pInstrument->GetFirstRegion();
          while (pRgn) {
+             // we randomly schedule 90% for the .gig file loading and the remaining 10% now for sample caching
+             const float localProgress = 0.9f + 0.1f * (float) iRegion / (float) pInstrument->Regions;
+             DispatchResourceProgressEvent(Key, localProgress);
              if (pRgn->GetSample() && !pRgn->GetSample()->GetCache().Size) {
                  dmsg(2,("C"));
-                 CacheInitialSamples(pRgn->GetSample(), dynamic_cast<gig::Engine*>(pConsumer));
+                 CacheInitialSamples(pRgn->GetSample(), (gig::EngineChannel*) pConsumer);
              }
              for (uint i = 0; i < pRgn->DimensionRegions; i++) {
-                 CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample, dynamic_cast<gig::Engine*>(pConsumer));
+                 CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample, (gig::EngineChannel*) pConsumer);
              }
              pRgn = pInstrument->GetNextRegion();
+             iRegion++;
          }
          dmsg(1,("OK\n"));
+         DispatchResourceProgressEvent(Key, 1.0f); // done; notify all consumers about progress 100%
          // we need the following for destruction later
          instr_entry_t* pEntry = new instr_entry_t;
-         pEntry->iInstrument   = Key.iInstrument;
+         pEntry->ID.FileName   = Key.FileName;
+         pEntry->ID.Index      = Key.Index;
          pEntry->pGig          = pGig;
-         // and this to check if we need to reallocate for a engine with higher value of 'MaxSamplesPerSecond'
-         pEntry->MaxSamplesPerCycle = dynamic_cast<gig::Engine*>(pConsumer)->pAudioOutputDevice->MaxSamplesPerCycle();
+         gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(pConsumer);
+         // and we save this to check if we need to reallocate for a engine with higher value of 'MaxSamplesPerSecond'
+         pEntry->MaxSamplesPerCycle =
+             (!pEngineChannel) ? 0 /* don't care for instrument editors */ :
+                 (pEngineChannel->GetEngine()) ?
+                     dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine())->pAudioOutputDevice->MaxSamplesPerCycle()
+                     : GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE;
          pArg = pEntry;
          return pInstrument;
-Line 69 
 namespace LinuxSampler { namespace gig {
+Line 601 
 namespace LinuxSampler { namespace gig {
      void InstrumentResourceManager::Destroy( ::gig::Instrument* pResource, void* pArg) {
          instr_entry_t* pEntry = (instr_entry_t*) pArg;
-         Gigs.HandBack(pEntry->pGig, (GigConsumer*) pEntry->iInstrument); // conversion kinda hackish :/
+         // we don't need the .gig file here anymore
+         Gigs.HandBack(pEntry->pGig, (GigConsumer*) pEntry->ID.Index); // conversion kinda hackish :/
          delete pEntry;
      }
      void InstrumentResourceManager::OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg) {
          instr_entry_t* pEntry = (instr_entry_t*) pArg;
-         if (pEntry->MaxSamplesPerCycle < dynamic_cast<gig::Engine*>(pConsumer)->pAudioOutputDevice->MaxSamplesPerCycle()) {
+         gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(pConsumer);
+         uint maxSamplesPerCycle =
+             (pEngineChannel && pEngineChannel->GetEngine()) ? dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine())->pAudioOutputDevice->MaxSamplesPerCycle()
+                                           : GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE;
+         if (pEntry->MaxSamplesPerCycle < maxSamplesPerCycle) {
              Update(pResource, pConsumer);
          }
      }
      /**
+      * Give back an instrument. This should be used instead of
+      * HandBack if there are some dimension regions that are still in
+      * use. (When an instrument is changed, the voices currently
+      * playing are allowed to keep playing with the old instrument
+      * until note off arrives. New notes will use the new instrument.)
+      */
+     void InstrumentResourceManager::HandBackInstrument(::gig::Instrument* pResource, InstrumentConsumer* pConsumer,
+                                                        RTList< ::gig::DimensionRegion*>* pDimRegionsInUse) {
+         DimRegInfoMutex.Lock();
+         for (RTList< ::gig::DimensionRegion*>::Iterator i = pDimRegionsInUse->first() ; i != pDimRegionsInUse->end() ; i++) {
+             DimRegInfo[*i].refCount++;
+             SampleRefCount[(*i)->pSample]++;
+         }
+         HandBack(pResource, pConsumer, true);
+         DimRegInfoMutex.Unlock();
+     }
+     /**
+      * Give back a dimension region that belongs to an instrument that
+      * was previously handed back.
+      */
+     void InstrumentResourceManager::HandBackDimReg(::gig::DimensionRegion* pDimReg) {
+         DimRegInfoMutex.Lock();
+         dimreg_info_t& dimRegInfo = DimRegInfo[pDimReg];
+         int dimRegRefCount = --dimRegInfo.refCount;
+         int sampleRefCount = --SampleRefCount[pDimReg->pSample];
+         if (dimRegRefCount == 0) {
+             ::gig::File* gig = dimRegInfo.file;
+             ::RIFF::File* riff = dimRegInfo.riff;
+             DimRegInfo.erase(pDimReg);
+             // TODO: we could delete Region and Instrument here if
+             // they have become unused
+             if (sampleRefCount == 0) {
+                 SampleRefCount.erase(pDimReg->pSample);
+                 if (gig) {
+                     gig->DeleteSample(pDimReg->pSample);
+                     if (!gig->GetFirstSample()) {
+                         dmsg(2,("No more samples in use - freeing gig\n"));
+                         delete gig;
+                         delete riff;
+                     }
+                 }
+             }
+         }
+         DimRegInfoMutex.Unlock();
+     }
+     /**
+      * Just a wrapper around the other @c CacheInitialSamples() method.
+      *
+      *  @param pSample - points to the sample to be cached
+      *  @param pEngine - pointer to Gig Engine Channel which caused this call
+      *                   (may be NULL, in this case default amount of samples
+      *                   will be cached)
+      */
+     void InstrumentResourceManager::CacheInitialSamples(::gig::Sample* pSample, gig::EngineChannel* pEngineChannel) {
+         gig::Engine* pEngine =
+             (pEngineChannel && pEngineChannel->GetEngine()) ?
+                 dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine()) : NULL;
+         CacheInitialSamples(pSample, pEngine);
+     }
+     /**
       *  Caches a certain size at the beginning of the given sample in RAM. If the
       *  sample is very short, the whole sample will be loaded into RAM and thus
       *  no disk streaming is needed for this sample. Caching an initial part of
-Line 88 
 namespace LinuxSampler { namespace gig {
+Line 690 
 namespace LinuxSampler { namespace gig {
       *
       *  @param pSample - points to the sample to be cached
       *  @param pEngine - pointer to Gig Engine which caused this call
+      *                   (may be NULL, in this case default amount of samples
+      *                   will be cached)
       */
      void InstrumentResourceManager::CacheInitialSamples(::gig::Sample* pSample, gig::Engine* pEngine) {
-         if (!pSample || pSample->GetCache().Size || !pSample->SamplesTotal) return;
+         if (!pSample) {
-         if (pSample->SamplesTotal <= NUM_RAM_PRELOAD_SAMPLES) {
+             dmsg(4,("gig::InstrumentResourceManager: Skipping sample (pSample == NULL)\n"));
+             return;
+         }
+         if (!pSample->SamplesTotal) return; // skip zero size samples
+         if (pSample->SamplesTotal <= CONFIG_PRELOAD_SAMPLES) {
              // Sample is too short for disk streaming, so we load the whole
-             // sample into RAM and place 'pAudioIO->FragmentSize << MAX_PITCH'
+             // sample into RAM and place 'pAudioIO->FragmentSize << CONFIG_MAX_PITCH'
              // number of '0' samples (silence samples) behind the official buffer
              // border, to allow the interpolator do it's work even at the end of
              // the sample.
-             dmsg(3,("Caching whole sample (sample name: \"%s\", sample size: %d)\n", pSample->pInfo->Name.c_str(), pSample->SamplesTotal));
+             const uint maxSamplesPerCycle =
-             const uint silenceSamples = (pEngine->pAudioOutputDevice->MaxSamplesPerCycle() << MAX_PITCH) + 3;
+                 (pEngine) ? pEngine->pAudioOutputDevice->MaxSamplesPerCycle()
-             ::gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(silenceSamples);
+                           : GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE;
-             dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize));
+             const uint neededSilenceSamples = (maxSamplesPerCycle << CONFIG_MAX_PITCH) + 3;
+             const uint currentlyCachedSilenceSamples = pSample->GetCache().NullExtensionSize / pSample->FrameSize;
+             if (currentlyCachedSilenceSamples < neededSilenceSamples) {
+                 dmsg(3,("Caching whole sample (sample name: \"%s\", sample size: %d)\n", pSample->pInfo->Name.c_str(), pSample->SamplesTotal));
+                 ::gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(neededSilenceSamples);
+                 dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize));
+             }
          }
-         else { // we only cache NUM_RAM_PRELOAD_SAMPLES and stream the other sample points from disk
+         else { // we only cache CONFIG_PRELOAD_SAMPLES and stream the other sample points from disk
-             pSample->LoadSampleData(NUM_RAM_PRELOAD_SAMPLES);
+             if (!pSample->GetCache().Size) pSample->LoadSampleData(CONFIG_PRELOAD_SAMPLES);
          }
          if (!pSample->GetCache().Size) std::cerr << "Unable to cache sample - maybe memory full!" << std::endl << std::flush;
      }
+     void InstrumentResourceManager::UncacheInitialSamples(::gig::Sample* pSample) {
+         dmsg(1,("Uncaching sample %x\n",pSample));
+         if (pSample->GetCache().Size) pSample->ReleaseSampleData();
+     }
+     /**
+      * Returns a list with all instruments currently in use, that are part of
+      * the given file.
+      *
+      * @param pFile - search criteria
+      * @param bLock - whether we should lock (mutex) the instrument manager
+      *                during this call and unlock at the end of this call
+      */
+     std::vector< ::gig::Instrument*> InstrumentResourceManager::GetInstrumentsCurrentlyUsedOf(::gig::File* pFile, bool bLock) {
+         if (bLock) Lock();
+         std::vector< ::gig::Instrument*> result;
+         std::vector< ::gig::Instrument*> allInstruments = Resources(false/*don't lock again*/);
+         for (int i = 0; i < allInstruments.size(); i++)
+             if (
+                 (::gig::File*) allInstruments[i]->GetParent()
+                 == pFile
+             ) result.push_back(allInstruments[i]);
+         if (bLock) Unlock();
+         return result;
+     }
+     /**
+      * Returns a list with all gig engine channels that are currently using
+      * the given instrument.
+      *
+      * @param pInstrument - search criteria
+      * @param bLock - whether we should lock (mutex) the instrument manager
+      *                during this call and unlock at the end of this call
+      */
+     std::set<gig::EngineChannel*> InstrumentResourceManager::GetEngineChannelsUsing(::gig::Instrument* pInstrument, bool bLock) {
+         if (bLock) Lock();
+         std::set<gig::EngineChannel*> result;
+         std::set<ResourceConsumer< ::gig::Instrument>*> consumers = ConsumersOf(pInstrument);
+         std::set<ResourceConsumer< ::gig::Instrument>*>::iterator iter = consumers.begin();
+         std::set<ResourceConsumer< ::gig::Instrument>*>::iterator end  = consumers.end();
+         for (; iter != end; ++iter) {
+             gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(*iter);
+             if (!pEngineChannel) continue;
+             result.insert(pEngineChannel);
+         }
+         if (bLock) Unlock();
+         return result;
+     }
+     /**
+      * Returns a list with all gig Engines that are currently using the given
+      * instrument.
+      *
+      * @param pInstrument - search criteria
+      * @param bLock - whether we should lock (mutex) the instrument manager
+      *                during this call and unlock at the end of this call
+      */
+     std::set<gig::Engine*> InstrumentResourceManager::GetEnginesUsing(::gig::Instrument* pInstrument, bool bLock) {
+         if (bLock) Lock();
+         std::set<gig::Engine*> result;
+         std::set<ResourceConsumer< ::gig::Instrument>*> consumers = ConsumersOf(pInstrument);
+         std::set<ResourceConsumer< ::gig::Instrument>*>::iterator iter = consumers.begin();
+         std::set<ResourceConsumer< ::gig::Instrument>*>::iterator end  = consumers.end();
+         for (; iter != end; ++iter) {
+             gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(*iter);
+             if (!pEngineChannel) continue;
+             gig::Engine* pEngine = dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine());
+             if (!pEngine) continue;
+             result.insert(pEngine);
+         }
+         if (bLock) Unlock();
+         return result;
+     }
+     /**
+      * Returns a list with all gig Engines that are currently using an
+      * instrument that is part of the given instrument file.
+      *
+      * @param pFile - search criteria
+      * @param bLock - whether we should lock (mutex) the instrument manager
+      *                during this call and unlock at the end of this call
+      */
+     std::set<gig::Engine*> InstrumentResourceManager::GetEnginesUsing(::gig::File* pFile, bool bLock) {
+         if (bLock) Lock();
+         // get all instruments (currently in usage) that use that same gig::File
+         std::vector< ::gig::Instrument*> instrumentsOfInterest =
+             GetInstrumentsCurrentlyUsedOf(pFile, false/*don't lock again*/);
+         // get all engines that use that same gig::File
+         std::set<gig::Engine*> result;
+         {
+             for (int i = 0; i < instrumentsOfInterest.size(); i++) {
+                 std::set<ResourceConsumer< ::gig::Instrument>*> consumers = ConsumersOf(instrumentsOfInterest[i]);
+                 std::set<ResourceConsumer< ::gig::Instrument>*>::iterator iter = consumers.begin();
+                 std::set<ResourceConsumer< ::gig::Instrument>*>::iterator end  = consumers.end();
+                 for (; iter != end; ++iter) {
+                     gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(*iter);
+                     if (!pEngineChannel) continue;
+                     gig::Engine* pEngine = dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine());
+                     if (!pEngine) continue;
+                     // the unique, sorted container std::set makes
+                     // sure we won't have duplicates
+                     result.insert(pEngine);
+                 }
+             }
+         }
+         if (bLock) Unlock();
+         return result;
+     }
+     /**
+      * Returns @c true in case the given sample is referenced somewhere by the
+      * given instrument, @c false otherwise.
+      *
+      * @param pSample - sample reference
+      * @param pInstrument - instrument that might use that sample
+      */
+     bool InstrumentResourceManager::SampleReferencedByInstrument(::gig::Sample* pSample, ::gig::Instrument* pInstrument) {
+         for (
+             ::gig::Region* pRegion = pInstrument->GetFirstRegion();
+             pRegion; pRegion = pInstrument->GetNextRegion()
+         ) {
+             for (
+                 int i = 0; i < pRegion->DimensionRegions &&
+                 pRegion->pDimensionRegions[i]; i++
+             ) {
+                 if (pRegion->pDimensionRegions[i]->pSample == pSample)
+                     return true;
+             }
+         }
+         return false;
+     }
+     /**
+      * Suspend all gig engines that use the given instrument. This means
+      * completely stopping playback on those engines and killing all their
+      * voices and disk streams. This method will block until all voices AND
+      * their disk streams are finally deleted and the engine turned into a
+      * complete idle loop.
+      *
+      * All @c SuspendEnginesUsing() methods only serve one thread by one and
+      * block all other threads until the current active thread called
+      * @c ResumeAllEngines() .
+      *
+      * @param pInstrument - search criteria
+      */
+     void InstrumentResourceManager::SuspendEnginesUsing(::gig::Instrument* pInstrument) {
+         // make sure no other thread suspends whole engines at the same time
+         suspendedEnginesMutex.Lock();
+         // get all engines that use that same gig::Instrument
+         suspendedEngines = GetEnginesUsing(pInstrument, true/*lock*/);
+         // finally, completely suspend all engines that use that same gig::Instrument
+         std::set<gig::Engine*>::iterator iter = suspendedEngines.begin();
+         std::set<gig::Engine*>::iterator end  = suspendedEngines.end();
+         for (; iter != end; ++iter) (*iter)->SuspendAll();
+     }
+     /**
+      * Suspend all gig engines that use the given instrument file. This means
+      * completely stopping playback on those engines and killing all their
+      * voices and disk streams. This method will block until all voices AND
+      * their disk streams are finally deleted and the engine turned into a
+      * complete idle loop.
+      *
+      * All @c SuspendEnginesUsing() methods only serve one thread by one and
+      * block all other threads until the current active thread called
+      * @c ResumeAllEngines() .
+      *
+      * @param pFile - search criteria
+      */
+     void InstrumentResourceManager::SuspendEnginesUsing(::gig::File* pFile) {
+         // make sure no other thread suspends whole engines at the same time
+         suspendedEnginesMutex.Lock();
+         // get all engines that use that same gig::File
+         suspendedEngines = GetEnginesUsing(pFile, true/*lock*/);
+         // finally, completely suspend all engines that use that same gig::File
+         std::set<gig::Engine*>::iterator iter = suspendedEngines.begin();
+         std::set<gig::Engine*>::iterator end  = suspendedEngines.end();
+         for (; iter != end; ++iter) (*iter)->SuspendAll();
+     }
+     /**
+      * MUST be called after one called one of the @c SuspendEnginesUsing()
+      * methods, to resume normal playback on all previously suspended engines.
+      * As it's only possible for one thread to suspend whole engines at the
+      * same time, this method doesn't take any arguments.
+      */
+     void InstrumentResourceManager::ResumeAllEngines() {
+         // resume all previously completely suspended engines
+         std::set<Engine*>::iterator iter = suspendedEngines.begin();
+         std::set<Engine*>::iterator end  = suspendedEngines.end();
+         for (; iter != end; ++iter) (*iter)->ResumeAll();
+         // no more suspended engines ...
+         suspendedEngines.clear();
+         // allow another thread to suspend whole engines
+         suspendedEnginesMutex.Unlock();
+     }
      // internal gig file manager
-Line 124 
 namespace LinuxSampler { namespace gig {
+Line 937 
 namespace LinuxSampler { namespace gig {
      void InstrumentResourceManager::GigResourceManager::Destroy(::gig::File* pResource, void* pArg) {
          dmsg(1,("Freeing gig file from memory..."));
-         delete pResource;
-         delete (::RIFF::File*) pArg;
+         // Delete as much as possible of the gig file. Some of the
+         // dimension regions and samples may still be in use - these
+         // will be deleted later by the HandBackDimReg function.
+         bool deleteFile = true;
+         ::gig::Instrument* nextInstrument;
+         for (::gig::Instrument* instrument = pResource->GetFirstInstrument() ;
+              instrument ;
+              instrument = nextInstrument) {
+             nextInstrument = pResource->GetNextInstrument();
+             bool deleteInstrument = true;
+             ::gig::Region* nextRegion;
+             for (::gig::Region *region = instrument->GetFirstRegion() ;
+                  region ;
+                  region = nextRegion) {
+                 nextRegion = instrument->GetNextRegion();
+                 bool deleteRegion = true;
+                 for (int i = 0 ; i < region->DimensionRegions ; i++)
+                 {
+                     ::gig::DimensionRegion *d = region->pDimensionRegions[i];
+                     std::map< ::gig::DimensionRegion*, dimreg_info_t>::iterator iter = parent->DimRegInfo.find(d);
+                     if (iter != parent->DimRegInfo.end()) {
+                         dimreg_info_t& dimRegInfo = (*iter).second;
+                         dimRegInfo.file = pResource;
+                         dimRegInfo.riff = (::RIFF::File*)pArg;
+                         deleteFile = deleteInstrument = deleteRegion = false;
+                     }
+                 }
+                 if (deleteRegion) instrument->DeleteRegion(region);
+             }
+             if (deleteInstrument) pResource->DeleteInstrument(instrument);
+         }
+         if (deleteFile) {
+             delete pResource;
+             delete (::RIFF::File*) pArg;
+         } else {
+             dmsg(2,("keeping some samples that are in use..."));
+             ::gig::Sample* nextSample;
+             for (::gig::Sample* sample = pResource->GetFirstSample() ;
+                  sample ;
+                  sample = nextSample) {
+                 nextSample = pResource->GetNextSample();
+                 if (parent->SampleRefCount.find(sample) == parent->SampleRefCount.end()) {
+                     pResource->DeleteSample(sample);
+                 }
+             }
+         }
          dmsg(1,("OK\n"));
      }

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+Added in v.1797

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