/[svn]/linuxsampler/trunk/src/engines/gig/EngineChannel.cpp
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Diff of /linuxsampler/trunk/src/engines/gig/EngineChannel.cpp

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revision 1039 by persson, Sat Feb 3 20:46:44 2007 UTC revision 2127 by persson, Wed Sep 22 18:59:16 2010 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
6   *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *   *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
7     *   Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev        *
8   *                                                                         *   *                                                                         *
9   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
10   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 22  Line 23 
23   ***************************************************************************/   ***************************************************************************/
24    
25  #include "EngineChannel.h"  #include "EngineChannel.h"
26    #include "Engine.h"
27    
28  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
   
29      EngineChannel::EngineChannel() {      EngineChannel::EngineChannel() {
30          pMIDIKeyInfo = new midi_key_info_t[128];          
         pEngine      = NULL;  
         pInstrument  = NULL;  
         pEvents      = NULL; // we allocate when we retrieve the right Engine object  
         pEventQueue  = new RingBuffer<Event,false>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);  
         pActiveKeys  = new Pool<uint>(128);  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices  = NULL; // we allocate when we retrieve the right Engine object  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pEvents        = NULL; // we allocate when we retrieve the right Engine object  
             pMIDIKeyInfo[i].VoiceTheftsQueued = 0;  
             pMIDIKeyInfo[i].RoundRobinIndex = 0;  
         }  
         InstrumentIdx  = -1;  
         InstrumentStat = -1;  
         pChannelLeft  = NULL;  
         pChannelRight = NULL;  
         AudioDeviceChannelLeft  = -1;  
         AudioDeviceChannelRight = -1;  
         pMidiInputPort = NULL;  
         midiChannel = midi_chan_all;  
         ResetControllers();  
         SoloMode       = false;  
         PortamentoMode = false;  
         PortamentoTime = CONFIG_PORTAMENTO_TIME_DEFAULT;  
31      }      }
32    
33      EngineChannel::~EngineChannel() {      EngineChannel::~EngineChannel() {
34          DisconnectAudioOutputDevice();          DisconnectAudioOutputDevice();
35          if (pInstrument) Engine::instruments.HandBack(pInstrument, this);          // In case the channel was removed before the instrument was
36          if (pEventQueue) delete pEventQueue;          // fully loaded, try to give back instrument again (see bug #113)
37          if (pActiveKeys) delete pActiveKeys;          InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(NULL);
38          if (pMIDIKeyInfo) delete[] pMIDIKeyInfo;          if (cmd.pInstrument) {
39          RemoveAllFxSends();              Engine::instruments.HandBack(cmd.pInstrument, this);
     }  
   
     /**  
      * Implementation of virtual method from abstract EngineChannel interface.  
      * This method will periodically be polled (e.g. by the LSCP server) to  
      * check if some engine channel parameter has changed since the last  
      * StatusChanged() call.  
      *  
      * This method can also be used to mark the engine channel as changed  
      * from outside, e.g. by a MIDI input device. The optional argument  
      * \a nNewStatus can be used for this.  
      *  
      * TODO: This "poll method" is just a lazy solution and might be  
      *       replaced in future.  
      * @param bNewStatus - (optional, default: false) sets the new status flag  
      * @returns true if engine channel status has changed since last  
      *          StatusChanged() call  
      */  
     bool EngineChannel::StatusChanged(bool bNewStatus) {  
         bool b = bStatusChanged;  
         bStatusChanged = bNewStatus;  
         return b;  
     }  
   
     void EngineChannel::Reset() {  
         if (pEngine) pEngine->DisableAndLock();  
         ResetInternal();  
         ResetControllers();  
         if (pEngine) {  
             pEngine->Enable();  
             pEngine->Reset();  
40          }          }
41            ///////
42      }      }
43    
44      /**      AbstractEngine::Format EngineChannel::GetEngineFormat() { return AbstractEngine::GIG; }
45       * This method is not thread safe!  
46       */      /** This method is not thread safe! */
47      void EngineChannel::ResetInternal() {      void EngineChannel::ResetInternal() {
48          CurrentKeyDimension = 0;          CurrentKeyDimension = 0;
49            EngineChannelBase<Voice, ::gig::DimensionRegion, ::gig::Instrument>::ResetInternal();
         // reset key info  
         for (uint i = 0; i < 128; i++) {  
             if (pMIDIKeyInfo[i].pActiveVoices)  
                 pMIDIKeyInfo[i].pActiveVoices->clear();  
             if (pMIDIKeyInfo[i].pEvents)  
                 pMIDIKeyInfo[i].pEvents->clear();  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].itSelf         = Pool<uint>::Iterator();  
             pMIDIKeyInfo[i].VoiceTheftsQueued = 0;  
         }  
         SoloKey       = -1;    // no solo key active yet  
         PortamentoPos = -1.0f; // no portamento active yet  
   
         // reset all key groups  
         std::map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();  
         for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;  
   
         // free all active keys  
         pActiveKeys->clear();  
   
         // delete all input events  
         pEventQueue->init();  
   
         if (pEngine) pEngine->ResetInternal();  
   
         // status of engine channel has changed, so set notify flag  
         bStatusChanged = true;  
     }  
   
     LinuxSampler::Engine* EngineChannel::GetEngine() {  
         return pEngine;  
50      }      }
51    
52      /**      /**
53       * More or less a workaround to set the instrument name, index and load       *  Will be called by the MIDIIn Thread to signal that a program
54       * status variable to zero percent immediately, that is without blocking       *  change should be performed. As a program change isn't
55       * the calling thread. It might be used in future for other preparations       *  real-time safe, the actual change is performed by the disk
56       * as well though.       *  thread.
57       *       *
58       * @param FileName   - file name of the Gigasampler instrument file       *  @param Program     - MIDI program change number
      * @param Instrument - index of the instrument in the .gig file  
      * @see LoadInstrument()  
59       */       */
60      void EngineChannel::PrepareLoadInstrument(const char* FileName, uint Instrument) {      void EngineChannel::SendProgramChange(uint8_t Program) {
61          InstrumentFile = FileName;          Engine* engine = dynamic_cast<Engine*>(pEngine);
62          InstrumentIdx  = Instrument;          if(engine == NULL) return;
63          InstrumentStat = 0;  
64            if(engine->GetDiskThread()) {
65                engine->GetDiskThread()->OrderProgramChange(Program, this);
66            } else {
67                // TODO:
68            }
69      }      }
70    
71      /**      /**
# Line 159  namespace LinuxSampler { namespace gig { Line 74  namespace LinuxSampler { namespace gig {
74       * This method will then actually start to load the instrument and block       * This method will then actually start to load the instrument and block
75       * the calling thread until loading was completed.       * the calling thread until loading was completed.
76       *       *
      * @returns detailed description of the method call result  
77       * @see PrepareLoadInstrument()       * @see PrepareLoadInstrument()
78       */       */
79      void EngineChannel::LoadInstrument() {      void EngineChannel::LoadInstrument() {
80          ::gig::Instrument* oldInstrument = pInstrument;          InstrumentResourceManager* pInstrumentManager = dynamic_cast<InstrumentResourceManager*>(pEngine->GetInstrumentManager());
81    
82          // free old instrument          // make sure we don't trigger any new notes with an old
83          if (oldInstrument) {          // instrument
84              if (pEngine) {          InstrumentChangeCmd< ::gig::DimensionRegion, ::gig::Instrument>& cmd = ChangeInstrument(0);
85                  // make sure we don't trigger any new notes with the          if (cmd.pInstrument) {
86                  // old instrument              // give old instrument back to instrument manager, but
87                  ::gig::DimensionRegion** dimRegionsInUse = pEngine->ChangeInstrument(this, 0);              // keep the dimension regions and samples that are in use
88                pInstrumentManager->HandBackInstrument(cmd.pInstrument, this, cmd.pRegionsInUse);
                 // give old instrument back to instrument manager, but  
                 // keep the dimension regions and samples that are in  
                 // use  
                 Engine::instruments.HandBackInstrument(oldInstrument, this, dimRegionsInUse);  
             } else {  
                 Engine::instruments.HandBack(oldInstrument, this);  
             }  
89          }          }
90            cmd.pRegionsInUse->clear();
91    
92          // delete all key groups          // delete all key groups
93          ActiveKeyGroups.clear();          DeleteGroupEventLists();
94    
95          // request gig instrument from instrument manager          // request gig instrument from instrument manager
96          ::gig::Instrument* newInstrument;          ::gig::Instrument* newInstrument;
# Line 190  namespace LinuxSampler { namespace gig { Line 98  namespace LinuxSampler { namespace gig {
98              InstrumentManager::instrument_id_t instrid;              InstrumentManager::instrument_id_t instrid;
99              instrid.FileName  = InstrumentFile;              instrid.FileName  = InstrumentFile;
100              instrid.Index     = InstrumentIdx;              instrid.Index     = InstrumentIdx;
101              newInstrument = Engine::instruments.Borrow(instrid, this);  
102                newInstrument = pInstrumentManager->Borrow(instrid, this);
103              if (!newInstrument) {              if (!newInstrument) {
104                  InstrumentStat = -1;                  throw InstrumentManagerException("resource was not created");
                 dmsg(1,("no instrument loaded!!!\n"));  
                 exit(EXIT_FAILURE);  
105              }              }
106          }          }
107          catch (RIFF::Exception e) {          catch (RIFF::Exception e) {
108              InstrumentStat = -2;              InstrumentStat = -2;
109                StatusChanged(true);
110              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
111              throw Exception(msg);              throw Exception(msg);
112          }          }
113          catch (InstrumentResourceManagerException e) {          catch (InstrumentManagerException e) {
114              InstrumentStat = -3;              InstrumentStat = -3;
115                StatusChanged(true);
116              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
117              throw Exception(msg);              throw Exception(msg);
118          }          }
119          catch (...) {          catch (...) {
120              InstrumentStat = -4;              InstrumentStat = -4;
121                StatusChanged(true);
122              throw Exception("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");              throw Exception("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
123          }          }
124    
125          // rebuild ActiveKeyGroups map with key groups of current instrument          RoundRobinIndex = 0;
126          for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion())          for (int i = 0 ; i < 128 ; i++) pMIDIKeyInfo[i].pRoundRobinIndex = NULL;
             if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;  
   
         InstrumentIdxName = newInstrument->pInfo->Name;  
         InstrumentStat = 100;  
   
         if (pEngine) pEngine->ChangeInstrument(this, newInstrument);  
         else pInstrument = newInstrument;  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * we are currently using on this EngineChannel is going to be updated,  
      * so we can stop playback before that happens.  
      */  
     void EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {  
         dmsg(3,("gig::Engine: Received instrument update message.\n"));  
         if (pEngine) pEngine->DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * update process was completed, so we can continue with playback.  
      */  
     void EngineChannel::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())  
         if (pEngine) pEngine->Enable();  
         bStatusChanged = true; // status of engine has changed, so set notify flag  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager on progress changes  
      * while loading or realoading an instrument for this EngineChannel.  
      *  
      * @param fProgress - current progress as value between 0.0 and 1.0  
      */  
     void EngineChannel::OnResourceProgress(float fProgress) {  
         this->InstrumentStat = int(fProgress * 100.0f);  
         dmsg(7,("gig::EngineChannel: progress %d%", InstrumentStat));  
         bStatusChanged = true; // status of engine has changed, so set notify flag  
     }  
   
     void EngineChannel::Connect(AudioOutputDevice* pAudioOut) {  
         if (pEngine) {  
             if (pEngine->pAudioOutputDevice == pAudioOut) return;  
             DisconnectAudioOutputDevice();  
         }  
         pEngine = Engine::AcquireEngine(this, pAudioOut);  
         ResetInternal();  
         pEvents = new RTList<Event>(pEngine->pEventPool);  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pEngine->pVoicePool);  
             pMIDIKeyInfo[i].pEvents       = new RTList<Event>(pEngine->pEventPool);  
         }  
         AudioDeviceChannelLeft  = 0;  
         AudioDeviceChannelRight = 1;  
         if (fxSends.empty()) { // render directly into the AudioDevice's output buffers  
             pChannelLeft  = pAudioOut->Channel(AudioDeviceChannelLeft);  
             pChannelRight = pAudioOut->Channel(AudioDeviceChannelRight);  
         } else { // use local buffers for rendering and copy later  
             // ensure the local buffers have the correct size  
             if (pChannelLeft)  delete pChannelLeft;  
             if (pChannelRight) delete pChannelRight;  
             pChannelLeft  = new AudioChannel(0, pAudioOut->MaxSamplesPerCycle());  
             pChannelRight = new AudioChannel(1, pAudioOut->MaxSamplesPerCycle());  
         }  
         if (pEngine->EngineDisabled.GetUnsafe()) pEngine->Enable();  
         MidiInputPort::AddSysexListener(pEngine);  
     }  
   
     void EngineChannel::DisconnectAudioOutputDevice() {  
         if (pEngine) { // if clause to prevent disconnect loops  
             ResetInternal();  
             if (pEvents) {  
                 delete pEvents;  
                 pEvents = NULL;  
             }  
             for (uint i = 0; i < 128; i++) {  
                 if (pMIDIKeyInfo[i].pActiveVoices) {  
                     delete pMIDIKeyInfo[i].pActiveVoices;  
                     pMIDIKeyInfo[i].pActiveVoices = NULL;  
                 }  
                 if (pMIDIKeyInfo[i].pEvents) {  
                     delete pMIDIKeyInfo[i].pEvents;  
                     pMIDIKeyInfo[i].pEvents = NULL;  
                 }  
             }  
             Engine* oldEngine = pEngine;  
             AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice;  
             pEngine = NULL;  
             Engine::FreeEngine(this, oldAudioDevice);  
             AudioDeviceChannelLeft  = -1;  
             AudioDeviceChannelRight = -1;  
             if (!fxSends.empty()) { // free the local rendering buffers  
                 if (pChannelLeft)  delete pChannelLeft;  
                 if (pChannelRight) delete pChannelRight;  
             }  
             pChannelLeft  = NULL;  
             pChannelRight = NULL;  
         }  
     }  
   
     AudioOutputDevice* EngineChannel::GetAudioOutputDevice() {  
         return (pEngine) ? pEngine->pAudioOutputDevice : NULL;  
     }  
127    
128      void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {          // rebuild ActiveKeyGroups map with key groups of current
129          if (!pEngine || !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet.");          // instrument and set the round robin pointers to use one
130            // counter for each region
131          AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel);          int region = 0;
132          if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));          for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion()) {
133          switch (EngineAudioChannel) {              AddGroup(pRegion->KeyGroup);
134              case 0: // left output channel  
135                  if (fxSends.empty()) pChannelLeft = pChannel;              RoundRobinIndexes[region] = 0;
136                  AudioDeviceChannelLeft = AudioDeviceChannel;              for (int iKey = pRegion->KeyRange.low; iKey <= pRegion->KeyRange.high; iKey++) {
137                  break;                  pMIDIKeyInfo[iKey].pRoundRobinIndex = &RoundRobinIndexes[region];
             case 1: // right output channel  
                 if (fxSends.empty()) pChannelRight = pChannel;  
                 AudioDeviceChannelRight = AudioDeviceChannel;  
                 break;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
   
     int EngineChannel::OutputChannel(uint EngineAudioChannel) {  
         switch (EngineAudioChannel) {  
             case 0: // left channel  
                 return AudioDeviceChannelLeft;  
             case 1: // right channel  
                 return AudioDeviceChannelRight;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
   
     void EngineChannel::Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) {  
         if (!pMidiPort || pMidiPort == this->pMidiInputPort) return;  
         DisconnectMidiInputPort();  
         this->pMidiInputPort = pMidiPort;  
         this->midiChannel    = MidiChannel;  
         pMidiPort->Connect(this, MidiChannel);  
     }  
   
     void EngineChannel::DisconnectMidiInputPort() {  
         MidiInputPort* pOldPort = this->pMidiInputPort;  
         this->pMidiInputPort = NULL;  
         if (pOldPort) pOldPort->Disconnect(this);  
     }  
   
     MidiInputPort* EngineChannel::GetMidiInputPort() {  
         return pMidiInputPort;  
     }  
   
     midi_chan_t EngineChannel::MidiChannel() {  
         return midiChannel;  
     }  
   
     FxSend* EngineChannel::AddFxSend(uint8_t MidiCtrl, String Name) throw (Exception) {  
         if (pEngine) pEngine->DisableAndLock();  
         FxSend* pFxSend = new FxSend(this, MidiCtrl, Name);  
         if (fxSends.empty()) {  
             if (pEngine && pEngine->pAudioOutputDevice) {  
                 AudioOutputDevice* pDevice = pEngine->pAudioOutputDevice;  
                 // create local render buffers  
                 pChannelLeft  = new AudioChannel(0, pDevice->MaxSamplesPerCycle());  
                 pChannelRight = new AudioChannel(1, pDevice->MaxSamplesPerCycle());  
             } else {  
                 // postpone local render buffer creation until audio device is assigned  
                 pChannelLeft  = NULL;  
                 pChannelRight = NULL;  
138              }              }
139                region++;
140          }          }
         fxSends.push_back(pFxSend);  
         if (pEngine) pEngine->Enable();  
         return pFxSend;  
     }  
   
     FxSend* EngineChannel::GetFxSend(uint FxSendIndex) {  
         return (FxSendIndex < fxSends.size()) ? fxSends[FxSendIndex] : NULL;  
     }  
   
     uint EngineChannel::GetFxSendCount() {  
         return fxSends.size();  
     }  
141    
142      void EngineChannel::RemoveFxSend(FxSend* pFxSend) {          InstrumentIdxName = newInstrument->pInfo->Name;
143          if (pEngine) pEngine->DisableAndLock();          InstrumentStat = 100;
         for (  
             std::vector<FxSend*>::iterator iter = fxSends.begin();  
             iter != fxSends.end(); iter++  
         ) {  
             if (*iter == pFxSend) {  
                 delete pFxSend;  
                 fxSends.erase(iter);  
                 if (fxSends.empty()) {  
                     // destroy local render buffers  
                     if (pChannelLeft)  delete pChannelLeft;  
                     if (pChannelRight) delete pChannelRight;  
                     // fallback to render directly into AudioOutputDevice's buffers  
                     if (pEngine && pEngine->pAudioOutputDevice) {  
                         pChannelLeft  = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);  
                         pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);  
                     } else { // we update the pointers later  
                         pChannelLeft  = NULL;  
                         pChannelRight = NULL;  
                     }  
                 }  
                 break;  
             }  
         }  
         if (pEngine) pEngine->Enable();  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to let the audio thread trigger a new  
      *  voice for the given key. This method is meant for real time rendering,  
      *  that is an event will immediately be created with the current system  
      *  time as time stamp.  
      *  
      *  @param Key      - MIDI key number of the triggered key  
      *  @param Velocity - MIDI velocity value of the triggered key  
      */  
     void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) {  
         if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent();  
             event.Type                = Event::type_note_on;  
             event.Param.Note.Key      = Key;  
             event.Param.Note.Velocity = Velocity;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to let the audio thread trigger a new  
      *  voice for the given key. This method is meant for offline rendering  
      *  and / or for cases where the exact position of the event in the current  
      *  audio fragment is already known.  
      *  
      *  @param Key         - MIDI key number of the triggered key  
      *  @param Velocity    - MIDI velocity value of the triggered key  
      *  @param FragmentPos - sample point position in the current audio  
      *                       fragment to which this event belongs to  
      */  
     void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {  
         if (FragmentPos < 0) {  
             dmsg(1,("EngineChannel::SendNoteOn(): negative FragmentPos! Seems MIDI driver is buggy!"));  
         }  
         else if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent(FragmentPos);  
             event.Type                = Event::type_note_on;  
             event.Param.Note.Key      = Key;  
             event.Param.Note.Velocity = Velocity;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread to release  
      *  voice(s) on the given key. This method is meant for real time rendering,  
      *  that is an event will immediately be created with the current system  
      *  time as time stamp.  
      *  
      *  @param Key      - MIDI key number of the released key  
      *  @param Velocity - MIDI release velocity value of the released key  
      */  
     void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) {  
         if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent();  
             event.Type                = Event::type_note_off;  
             event.Param.Note.Key      = Key;  
             event.Param.Note.Velocity = Velocity;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread to release  
      *  voice(s) on the given key. This method is meant for offline rendering  
      *  and / or for cases where the exact position of the event in the current  
      *  audio fragment is already known.  
      *  
      *  @param Key         - MIDI key number of the released key  
      *  @param Velocity    - MIDI release velocity value of the released key  
      *  @param FragmentPos - sample point position in the current audio  
      *                       fragment to which this event belongs to  
      */  
     void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {  
         if (FragmentPos < 0) {  
             dmsg(1,("EngineChannel::SendNoteOff(): negative FragmentPos! Seems MIDI driver is buggy!"));  
         }  
         else if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent(FragmentPos);  
             event.Type                = Event::type_note_off;  
             event.Param.Note.Key      = Key;  
             event.Param.Note.Velocity = Velocity;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
144    
145      /**          ChangeInstrument(newInstrument);
      *  Will be called by the MIDIIn Thread to signal the audio thread to change  
      *  the pitch value for all voices. This method is meant for real time  
      *  rendering, that is an event will immediately be created with the  
      *  current system time as time stamp.  
      *  
      *  @param Pitch - MIDI pitch value (-8192 ... +8191)  
      */  
     void EngineChannel::SendPitchbend(int Pitch) {  
         if (pEngine) {  
             Event event             = pEngine->pEventGenerator->CreateEvent();  
             event.Type              = Event::type_pitchbend;  
             event.Param.Pitch.Pitch = Pitch;  
             event.pEngineChannel    = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
146    
147      /**          StatusChanged(true);
      *  Will be called by the MIDIIn Thread to signal the audio thread to change  
      *  the pitch value for all voices. This method is meant for offline  
      *  rendering and / or for cases where the exact position of the event in  
      *  the current audio fragment is already known.  
      *  
      *  @param Pitch       - MIDI pitch value (-8192 ... +8191)  
      *  @param FragmentPos - sample point position in the current audio  
      *                       fragment to which this event belongs to  
      */  
     void EngineChannel::SendPitchbend(int Pitch, int32_t FragmentPos) {  
         if (FragmentPos < 0) {  
             dmsg(1,("EngineChannel::SendPitchBend(): negative FragmentPos! Seems MIDI driver is buggy!"));  
         }  
         else if (pEngine) {  
             Event event             = pEngine->pEventGenerator->CreateEvent(FragmentPos);  
             event.Type              = Event::type_pitchbend;  
             event.Param.Pitch.Pitch = Pitch;  
             event.pEngineChannel    = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
148      }      }
149    
150      /**      void EngineChannel::ProcessKeySwitchChange(int key) {
151       *  Will be called by the MIDIIn Thread to signal the audio thread that a          // Change key dimension value if key is in keyswitching area
      *  continuous controller value has changed. This method is meant for real  
      *  time rendering, that is an event will immediately be created with the  
      *  current system time as time stamp.  
      *  
      *  @param Controller - MIDI controller number of the occured control change  
      *  @param Value      - value of the control change  
      */  
     void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) {  
         if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent();  
             event.Type                = Event::type_control_change;  
             event.Param.CC.Controller = Controller;  
             event.Param.CC.Value      = Value;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread that a  
      *  continuous controller value has changed. This method is meant for  
      *  offline rendering and / or for cases where the exact position of the  
      *  event in the current audio fragment is already known.  
      *  
      *  @param Controller  - MIDI controller number of the occured control change  
      *  @param Value       - value of the control change  
      *  @param FragmentPos - sample point position in the current audio  
      *                       fragment to which this event belongs to  
      */  
     void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value, int32_t FragmentPos) {  
         if (FragmentPos < 0) {  
             dmsg(1,("EngineChannel::SendControlChange(): negative FragmentPos! Seems MIDI driver is buggy!"));  
         }  
         else if (pEngine) {  
             Event event               = pEngine->pEventGenerator->CreateEvent(FragmentPos);  
             event.Type                = Event::type_control_change;  
             event.Param.CC.Controller = Controller;  
             event.Param.CC.Value      = Value;  
             event.pEngineChannel      = this;  
             if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
             else dmsg(1,("EngineChannel: Input event queue full!"));  
         }  
     }  
   
     void EngineChannel::ClearEventLists() {  
         pEvents->clear();  
         // empty MIDI key specific event lists  
152          {          {
153              RTList<uint>::Iterator iuiKey = pActiveKeys->first();              if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
154              RTList<uint>::Iterator end    = pActiveKeys->end();                  CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
155              for(; iuiKey != end; ++iuiKey) {                      (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
                 pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key  
             }  
         }  
     }  
   
     void EngineChannel::ResetControllers() {  
         Pitch          = 0;  
         SustainPedal   = false;  
         SostenutoPedal = false;  
         GlobalVolume   = 1.0f;  
         MidiVolume     = 1.0;  
         GlobalPanLeft  = 1.0f;  
         GlobalPanRight = 1.0f;  
         // set all MIDI controller values to zero  
         memset(ControllerTable, 0x00, 129);  
     }  
   
     /**  
      * Copy all events from the engine channel's input event queue buffer to  
      * the internal event list. This will be done at the beginning of each  
      * audio cycle (that is each RenderAudio() call) to distinguish all  
      * events which have to be processed in the current audio cycle. Each  
      * EngineChannel has it's own input event queue for the common channel  
      * specific events (like NoteOn, NoteOff and ControlChange events).  
      * Beside that, the engine also has a input event queue for global  
      * events (usually SysEx messages).  
      *  
      * @param Samples - number of sample points to be processed in the  
      *                  current audio cycle  
      */  
     void EngineChannel::ImportEvents(uint Samples) {  
         RingBuffer<Event,false>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();  
         Event* pEvent;  
         while (true) {  
             // get next event from input event queue  
             if (!(pEvent = eventQueueReader.pop())) break;  
             // if younger event reached, ignore that and all subsequent ones for now  
             if (pEvent->FragmentPos() >= Samples) {  
                 eventQueueReader--;  
                 dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));  
                 pEvent->ResetFragmentPos();  
                 break;  
             }  
             // copy event to internal event list  
             if (pEvents->poolIsEmpty()) {  
                 dmsg(1,("Event pool emtpy!\n"));  
                 break;  
             }  
             *pEvents->allocAppend() = *pEvent;  
         }  
         eventQueueReader.free(); // free all copied events from input queue  
     }  
   
     void EngineChannel::RemoveAllFxSends() {  
         if (pEngine) pEngine->DisableAndLock();  
         if (!fxSends.empty()) { // free local render buffers  
             if (pChannelLeft) {  
                 delete pChannelLeft;  
                 if (pEngine && pEngine->pAudioOutputDevice) {  
                     // fallback to render directly to the AudioOutputDevice's buffer  
                     pChannelLeft = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);  
                 } else pChannelLeft = NULL;  
             }  
             if (pChannelRight) {  
                 delete pChannelRight;  
                 if (pEngine && pEngine->pAudioOutputDevice) {  
                     // fallback to render directly to the AudioOutputDevice's buffer  
                     pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);  
                 } else pChannelRight = NULL;  
             }  
156          }          }
         for (int i = 0; i < fxSends.size(); i++) delete fxSends[i];  
         fxSends.clear();  
         if (pEngine) pEngine->Enable();  
     }  
   
     float EngineChannel::Volume() {  
         return GlobalVolume;  
     }  
   
     void EngineChannel::Volume(float f) {  
         GlobalVolume = f;  
         bStatusChanged = true; // status of engine channel has changed, so set notify flag  
     }  
   
     uint EngineChannel::Channels() {  
         return 2;  
     }  
   
     String EngineChannel::InstrumentFileName() {  
         return InstrumentFile;  
     }  
   
     String EngineChannel::InstrumentName() {  
         return InstrumentIdxName;  
     }  
   
     int EngineChannel::InstrumentIndex() {  
         return InstrumentIdx;  
     }  
   
     int EngineChannel::InstrumentStatus() {  
         return InstrumentStat;  
     }  
   
     String EngineChannel::EngineName() {  
         return LS_GIG_ENGINE_NAME;  
157      }      }
158    
159  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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