/[svn]/linuxsampler/trunk/src/engines/gig/Engine.h
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revision 80 by schoenebeck, Sun May 23 19:16:33 2004 UTC revision 1748 by persson, Sun Jun 22 14:46:46 2008 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) 2005-2008 Christian Schoenebeck                         *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   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 25  Line 26 
26    
27  #include "../../common/global.h"  #include "../../common/global.h"
28    
29  #if DEBUG_HEADERS  #include <map>
30  # warning Engine.h included  #include <gig.h>
 #endif // DEBUG_HEADERS  
31    
32    #include "EngineGlobals.h"
33  #include "../../common/RingBuffer.h"  #include "../../common/RingBuffer.h"
34  #include "../../common/RTELMemoryPool.h"  #include "../../common/Pool.h"
35    #include "../../common/ArrayList.h"
36  #include "../../common/ConditionServer.h"  #include "../../common/ConditionServer.h"
37  #include "../common/Engine.h"  #include "../Engine.h"
38  #include "../common/Event.h"  #include "../common/Event.h"
 #include "../common/BiquadFilter.h"  
 #include "../../lib/fileloader/libgig/gig.h"  
 #include "InstrumentResourceManager.h"  
39  #include "../../network/lscp.h"  #include "../../network/lscp.h"
40    #include "EngineChannel.h"
41    
42  #define PITCHBEND_SEMITONES             12  // identifier of this sampler engine
43  #define MAX_AUDIO_VOICES                128  #define LS_GIG_ENGINE_NAME "GIG"
44    
45  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
46    
# Line 48  namespace LinuxSampler { namespace gig { Line 48  namespace LinuxSampler { namespace gig {
48      class Voice;      class Voice;
49      class DiskThread;      class DiskThread;
50      class InstrumentResourceManager;      class InstrumentResourceManager;
51        class midi_key_info_t;
52        class EngineChannel;
53    
54      /**      /**
55       * Sampler engine for the Gigasampler format.       * Sampler engine for the Gigasampler format.
56       */       */
57      class gig::Engine : public LinuxSampler::Engine, public InstrumentConsumer {      class Engine : public LinuxSampler::Engine {
58          public:          public:
59              // methods              // methods
60              Engine();              Engine();
61             ~Engine();              virtual ~Engine();
62                void Connect(AudioOutputDevice* pAudioOut);
63                void SuspendAll();
64                void ResumeAll();
65                void Suspend(::gig::Region* pRegion);
66                void Resume(::gig::Region* pRegion);
67    
68              // abstract methods derived from class 'LinuxSampler::Engine'              // implementation of abstract methods derived from class 'LinuxSampler::Engine'
69              virtual void   LoadInstrument(const char* FileName, uint Instrument);              virtual int    RenderAudio(uint Samples);
70                virtual void   SendSysex(void* pData, uint Size);
71              virtual void   Reset();              virtual void   Reset();
72              virtual void   Enable();              virtual void   Enable();
73              virtual void   Disable();              virtual void   Disable();
             virtual void   SendNoteOn(uint8_t Key, uint8_t Velocity);  
             virtual void   SendNoteOff(uint8_t Key, uint8_t Velocity);  
             virtual void   SendPitchbend(int Pitch);  
             virtual void   SendControlChange(uint8_t Controller, uint8_t Value);  
             virtual float  Volume();  
             virtual void   Volume(float f);  
             virtual void   Connect(AudioOutputDevice* pAudioOut);  
             virtual void   DisconnectAudioOutputDevice();  
             virtual int    RenderAudio(uint Samples);  
74              virtual uint   VoiceCount();              virtual uint   VoiceCount();
75              virtual uint   VoiceCountMax();              virtual uint   VoiceCountMax();
76              virtual bool   DiskStreamSupported();              virtual bool   DiskStreamSupported();
# Line 81  namespace LinuxSampler { namespace gig { Line 80  namespace LinuxSampler { namespace gig {
80              virtual String DiskStreamBufferFillPercentage();              virtual String DiskStreamBufferFillPercentage();
81              virtual String Description();              virtual String Description();
82              virtual String Version();              virtual String Version();
83                virtual String EngineName();
84                virtual InstrumentManager* GetInstrumentManager();
85    
86              // abstract methods derived from interface class 'InstrumentConsumer'              // Simple array wrapper just to make sure memory is freed
87              virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg);              // when liblinuxsampler is unloaded
88              virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg);              class FloatTable {
89          protected:              private:
90              struct midi_key_info_t {                  const float* array;
91                  RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.              public:
92                  bool            KeyPressed;    ///< Is true if the respective MIDI key is currently pressed.                  FloatTable(const float* array) : array(array) { }
93                  bool            Active;        ///< If the key contains active voices.                  ~FloatTable() { delete[] array; }
94                  uint*           pSelf;         ///< hack to allow fast deallocation of the key from the list of active keys                  const float& operator[](int i) const { return array[i]; }
                 RTEList<Event>* pEvents;       ///< Key specific events (only Note-on, Note-off and sustain pedal currently)  
95              };              };
96    
97              static InstrumentResourceManager Instruments;              static const FloatTable VolumeCurve;    ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90.
98                static const FloatTable PanCurve;       ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center).
99                static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127.
100    
101            //protected:
102                static InstrumentResourceManager instruments;
103    
104              AudioOutputDevice*      pAudioOutputDevice;              AudioOutputDevice*      pAudioOutputDevice;
105                uint                    SampleRate;            ///< Sample rate of the engines output audio signal (in Hz)
106                uint                    MaxSamplesPerCycle;    ///< Size of each audio output buffer
107              DiskThread*             pDiskThread;              DiskThread*             pDiskThread;
108              uint8_t                 ControllerTable[128];  ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.              RingBuffer<Event,false>* pEventQueue;          ///< Input event queue for engine global events (e.g. SysEx messages).
109              RingBuffer<Event>*      pEventQueue;           ///< Input event queue.              Pool<Voice>*            pVoicePool;            ///< Contains all voices that can be activated.
             midi_key_info_t         pMIDIKeyInfo[128];     ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key  
             RTELMemoryPool<Voice>*  pVoicePool;            ///< Contains all voices that can be activated.  
             RTELMemoryPool<uint>*   pActiveKeys;           ///< Holds all keys in it's allocation list with active voices.  
             RTELMemoryPool<Event>*  pEventPool;            ///< Contains all Event objects that can be used.  
110              EventGenerator*         pEventGenerator;              EventGenerator*         pEventGenerator;
111              RTEList<Event>*         pEvents;               ///< All events for the current audio fragment.              RTList<Event>*          pVoiceStealingQueue;   ///< All voice-launching events which had to be postponed due to free voice shortage.
112              RTEList<Event>*         pCCEvents;             ///< All control change events for the current audio fragment.              RTList<Event>*          pGlobalEvents;         ///< All engine global events for the current audio fragment (usually only SysEx messages).
113              RTEList<Event>*         pSynthesisEvents[Event::destination_count];     ///< Events directly affecting synthesis parameter (like pitch, volume and filter).              Pool<Event>*            pEventPool;            ///< Contains all Event objects that can be used.
114              float*                  pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop.              RingBuffer<uint8_t,false>* pSysexBuffer;       ///< Input buffer for MIDI system exclusive messages.
115              biquad_param_t*         pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter.              int                     ActiveVoiceCount;      ///< number of currently active voices (this value will be returned for public calls)
116              biquad_param_t*         pMainFilterParameters;  ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass).              int                     ActiveVoiceCountTemp;  ///< number of currently active voices (for internal usage, will be used for incrementation)
             RIFF::File*             pRIFF;  
             ::gig::File*            pGig;  
             ::gig::Instrument*      pInstrument;  
             bool                    SustainPedal;          ///< true if sustain pedal is down  
             double                  GlobalVolume;          ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)  
             int                     Pitch;                 ///< Current (absolute) MIDI pitch value.  
             int                     ActiveVoiceCount;      ///< number of currently active voices  
117              int                     ActiveVoiceCountMax;   ///< the maximum voice usage since application start              int                     ActiveVoiceCountMax;   ///< the maximum voice usage since application start
118                int                     VoiceSpawnsLeft;       ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit.
119                RTList<Voice>::Iterator itLastStolenVoice;     ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise.
120                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.
121                EngineChannel*          pLastStolenChannel;    ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment.
122                RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally
123                RTList<uint>::Iterator  iuiLastStolenKeyGlobally;  ///< Same as iuiLastStolenKey, but engine globally
124              bool                    SuspensionRequested;              bool                    SuspensionRequested;
125              ConditionServer         EngineDisabled;              ConditionServer         EngineDisabled;
126                int8_t                  ScaleTuning[12];       ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave
127              void ProcessNoteOn(Event* pNoteOnEvent);              int                     MinFadeOutSamples;     ///< The number of samples needed to make an instant fade out (e.g. for voice stealing) without leading to clicks.
128              void ProcessNoteOff(Event* pNoteOffEvent);              uint32_t                RandomSeed;            ///< State of the random number generator used by the random dimension.
129              void ProcessPitchbend(Event* pPitchbendEvent);              Mutex                   ResetInternalMutex;    ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads).
130              void ProcessControlChange(Event* pControlChangeEvent);              Pool< ::gig::DimensionRegion*>* pDimRegionPool[2]; ///< Double buffered pool, used by the engine channels to keep track of dimension regions in use.
131              void KillVoice(Voice* pVoice);  
132              void ResetSynthesisParameters(Event::destination_t dst, float val);              void ProcessEvents(EngineChannel* pEngineChannel, uint Samples);
133                void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples);
134                void RenderStolenVoices(uint Samples);
135                void RouteAudio(EngineChannel* pEngineChannel, uint Samples);
136                void PostProcess(EngineChannel* pEngineChannel);
137                void ClearEventLists();
138                void ImportEvents(uint Samples);
139                void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
140                void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent);
141                void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent);
142                void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent);
143                void ProcessSysex(Pool<Event>::Iterator& itSysexEvent);
144                void ProcessSuspensionsChanges();
145                void ProcessPendingStreamDeletions();
146                Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts);
147                int  StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent);
148                void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice);
149                void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey);
150              void ResetInternal();              void ResetInternal();
151                void ResetScaleTuning();
152                void ResetSuspendedRegions();
153    
154                static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
155                static void    FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice);
156    
157                void DisableAndLock(); // FIXME: should at least be protected
158    
159              friend class Voice;              friend class Voice;
             friend class EGADSR;  
             friend class EGDecay;  
             friend class VCAManipulator;  
             friend class VCFCManipulator;  
             friend class VCOManipulator;  
             friend class InstrumentResourceManager;  
160          private:          private:
161              void DisableAndLock();              Pool< ::gig::Region*> SuspendedRegions;
162                Mutex                 SuspendedRegionsMutex;
163                Condition             SuspensionChangeOngoing;
164                ::gig::Region*        pPendingRegionSuspension;
165                ::gig::Region*        pPendingRegionResumption;
166                int                   iPendingStreamDeletions;
167    
168                ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance.
169    
170                static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine.
171    
172                int SostenutoKeys[128];
173                int SostenutoKeyCount;
174    
175                uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize);
176                void    AdjustScale(int8_t ScaleTunes[12]);
177                void    ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent);
178                void    KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent);
179                bool    ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key);
180                bool    RegionSuspended(::gig::Region* pRegion);
181                static float* InitVolumeCurve();
182                static float* InitPanCurve();
183                static float* InitCrossfadeCurve();
184                static float* InitCurve(const float* segments, int size = 128);
185    
186                unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment
187      };      };
188    
189  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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