/[svn]/linuxsampler/trunk/src/engines/gig/Engine.h
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revision 2011 by schoenebeck, Sun Mar 29 18:43:40 2009 UTC revision 2012 by iliev, Fri Oct 23 17:53:17 2009 UTC
# Line 4  Line 4 
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) 2005-2009 Christian Schoenebeck                         *   *   Copyright (C) 2005-2009 Christian Schoenebeck                         *
7     *   Copyright (C) 2009 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  #ifndef __LS_GIG_ENGINE_H__  #ifndef __LS_GIG_ENGINE_H__
26  #define __LS_GIG_ENGINE_H__  #define __LS_GIG_ENGINE_H__
27    
28  #include "../../common/global.h"  #include "DiskThread.h"
29    #include "../EngineBase.h"
30  #include <map>  #include "Voice.h"
31  #include <gig.h>  #include <gig.h>
32    
 #include "EngineGlobals.h"  
 #include "../../common/RingBuffer.h"  
 #include "../../common/Pool.h"  
 #include "../../common/ArrayList.h"  
 #include "../../common/Condition.h"  
 #include "../../common/ConditionServer.h"  
 #include "../../common/atomic.h"  
 #include "../Engine.h"  
 #include "../common/Event.h"  
 #include "../../network/lscp.h"  
 #include "EngineChannel.h"  
   
 // identifier of this sampler engine  
 #define LS_GIG_ENGINE_NAME "GIG"  
   
33  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
34    
35      // just symbol prototyping      class Engine: public LinuxSampler::EngineBase<Voice, ::gig::Region, ::gig::DimensionRegion, DiskThread, InstrumentResourceManager, ::gig::Instrument> {
     class Voice;  
     class DiskThread;  
     class InstrumentResourceManager;  
     class midi_key_info_t;  
     class EngineChannel;  
   
     /**  
      * Sampler engine for the Gigasampler format.  
      */  
     class Engine : public LinuxSampler::Engine {  
36          public:          public:
37              // methods              Engine() { }
38              Engine();              virtual ~Engine() { }
             virtual ~Engine();  
             void Connect(AudioOutputDevice* pAudioOut);  
             void SuspendAll();  
             void ResumeAll();  
             void Suspend(::gig::Region* pRegion);  
             void Resume(::gig::Region* pRegion);  
   
39              // implementation of abstract methods derived from class 'LinuxSampler::Engine'              // implementation of abstract methods derived from class 'LinuxSampler::Engine'
40              virtual int    RenderAudio(uint Samples);              virtual bool    DiskStreamSupported();
41              virtual void   SendSysex(void* pData, uint Size, MidiInputPort* pSender);              virtual String  Description();
42              virtual void   Reset();              virtual String  Version();
43              virtual void   Enable();              
44              virtual void   Disable();              virtual Format  GetEngineFormat();
45              virtual uint   VoiceCount();  
46              virtual uint   VoiceCountMax();              virtual void ProcessControlChange (
47              virtual int    MaxVoices();                  LinuxSampler::EngineChannel*  pEngineChannel,
48              virtual void   SetMaxVoices(int iVoices) throw (Exception);                  Pool<Event>::Iterator&        itControlChangeEvent
49              virtual bool   DiskStreamSupported();              );
             virtual uint   DiskStreamCount();  
             virtual uint   DiskStreamCountMax();  
             virtual int    MaxDiskStreams();  
             virtual void   SetMaxDiskStreams(int iStreams) throw (Exception);  
             virtual String DiskStreamBufferFillBytes();  
             virtual String DiskStreamBufferFillPercentage();  
             virtual String Description();  
             virtual String Version();  
             virtual String EngineName();  
             virtual InstrumentManager* GetInstrumentManager();  
   
             void SetVoiceCount(uint Count);  
   
             // Simple array wrapper just to make sure memory is freed  
             // when liblinuxsampler is unloaded  
             class FloatTable {  
             private:  
                 const float* array;  
             public:  
                 FloatTable(const float* array) : array(array) { }  
                 ~FloatTable() { delete[] array; }  
                 const float& operator[](int i) const { return array[i]; }  
             };  
   
             static const FloatTable VolumeCurve;    ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.  
             static const FloatTable PanCurve;       ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).  
             static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.  
   
         //protected:  
             static InstrumentResourceManager instruments;  
   
             AudioOutputDevice*      pAudioOutputDevice;  
             uint                    SampleRate;            ///< Sample rate of the engines output audio signal (in Hz)  
             uint                    MaxSamplesPerCycle;    ///< Size of each audio output buffer  
             DiskThread*             pDiskThread;  
             RingBuffer<Event,false>* pEventQueue;          ///< Input event queue for engine global events (e.g. SysEx messages).  
             Pool<Voice>*            pVoicePool;            ///< Contains all voices that can be activated.  
             EventGenerator*         pEventGenerator;  
             RTList<Event>*          pVoiceStealingQueue;   ///< All voice-launching events which had to be postponed due to free voice shortage.  
             RTList<Event>*          pGlobalEvents;         ///< All engine global events for the current audio fragment (usually only SysEx messages).  
             Pool<Event>*            pEventPool;            ///< Contains all Event objects that can be used.  
             RingBuffer<uint8_t,false>* pSysexBuffer;       ///< Input buffer for MIDI system exclusive messages.  
             int                     ActiveVoiceCountTemp;  ///< number of currently active voices (for internal usage, will be used for incrementation)  
             int                     ActiveVoiceCountMax;   ///< the maximum voice usage since application start  
             int                     VoiceSpawnsLeft;       ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit.  
             RTList<Voice>::Iterator itLastStolenVoice;     ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.  
             RTList<uint>::Iterator  iuiLastStolenKey;      ///< Only for voice stealing: key number of last key on which the last voice was theft in current audio fragment, NULL otherwise.  
             EngineChannel*          pLastStolenChannel;    ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.  
             RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally  
             RTList<uint>::Iterator  iuiLastStolenKeyGlobally;  ///< Same as iuiLastStolenKey, but engine globally  
             bool                    SuspensionRequested;  
             ConditionServer         EngineDisabled;  
             int8_t                  ScaleTuning[12];       ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave  
             int                     MinFadeOutSamples;     ///< The number of samples needed to make an instant fade out (e.g. for voice stealing) without leading to clicks.  
             uint32_t                RandomSeed;            ///< State of the random number generator used by the random dimension.  
             Mutex                   ResetInternalMutex;    ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads).  
             Pool< ::gig::DimensionRegion*>* pDimRegionPool[2]; ///< Double buffered pool, used by the engine channels to keep track of dimension regions in use.  
   
             void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);  
             void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);  
             void RenderStolenVoices(uint Samples);  
             void RouteAudio(EngineChannel* pEngineChannel, uint Samples);  
             void PostProcess(EngineChannel* pEngineChannel);  
             void ClearEventLists();  
             void ImportEvents(uint Samples);  
             void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);  
             void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);  
             void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);  
             void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);  
             void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);  
             void ProcessSuspensionsChanges();  
             void ProcessPendingStreamDeletions();  
             Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts);  
             int  StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);  
             void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);  
             void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);  
             void ResetInternal();  
             void ResetScaleTuning();  
             void ResetSuspendedRegions();  
   
             static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);  
             static void    FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);  
   
             void DisableAndLock(); // FIXME: should at least be protected  
50    
51              friend class Voice;              friend class Voice;
         private:  
             Pool< ::gig::Region*> SuspendedRegions;  
             Mutex                 SuspendedRegionsMutex;  
             Condition             SuspensionChangeOngoing;  
             ::gig::Region*        pPendingRegionSuspension;  
             ::gig::Region*        pPendingRegionResumption;  
             int                   iPendingStreamDeletions;  
   
             ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.  
   
             static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.  
   
             int SostenutoKeys[128];  
             int SostenutoKeyCount;  
   
             uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize);  
             void    AdjustScale(int8_t ScaleTunes[12]);  
             void    ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);  
             void    KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);  
             bool    ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key);  
             bool    RegionSuspended(::gig::Region* pRegion);  
             static float* InitVolumeCurve();  
             static float* InitPanCurve();  
             static float* InitCrossfadeCurve();  
             static float* InitCurve(const float* segments, int size = 128);  
52    
53              unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment          protected:
54                virtual DiskThread* CreateDiskThread();
55    
56                virtual Pool<Voice>::Iterator LaunchVoice (
57                    LinuxSampler::EngineChannel* pEngineChannel,
58                    Pool<Event>::Iterator&       itNoteOnEvent,
59                    int                          iLayer,
60                    bool                         ReleaseTriggerVoice,
61                    bool                         VoiceStealing,
62                    bool                         HandleKeyGroupConflicts
63                );
64    
65                virtual void TriggerNewVoices (
66                    LinuxSampler::EngineChannel*  pEngineChannel,
67                    RTList<Event>::Iterator&      itNoteOnEvent,
68                    bool                          HandleKeyGroupConflicts
69                );
70    
71                void TriggerReleaseVoices (
72                    LinuxSampler::EngineChannel*  pEngineChannel,
73                    RTList<Event>::Iterator&      itNoteOffEvent
74                );
75    
76              atomic_t ActiveVoiceCount; ///< number of currently active voices          private:
77              int iMaxDiskStreams;              uint32_t RandomSeed;            ///< State of the random number generator used by the random dimension.
78      };      };
79    
80  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
81    
82  #endif // __LS_GIG_ENGINE_H__  #endif  /* __LS_GIG_ENGINE_H__ */
83    
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