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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005-2009 Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#ifndef __LS_GIG_ENGINE_H__ |
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#define __LS_GIG_ENGINE_H__ |
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#include "../../common/global.h" |
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|
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#include <map> |
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#include <gig.h> |
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#include "EngineGlobals.h" |
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#include "../../common/RingBuffer.h" |
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#include "../../common/Pool.h" |
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#include "../../common/ArrayList.h" |
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#include "../../common/Condition.h" |
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#include "../../common/ConditionServer.h" |
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#include "../../common/atomic.h" |
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#include "../Engine.h" |
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#include "../common/Event.h" |
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#include "../../network/lscp.h" |
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#include "EngineChannel.h" |
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|
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// identifier of this sampler engine |
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#define LS_GIG_ENGINE_NAME "GIG" |
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|
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namespace LinuxSampler { namespace gig { |
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|
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// just symbol prototyping |
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class Voice; |
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class DiskThread; |
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class InstrumentResourceManager; |
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class midi_key_info_t; |
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class EngineChannel; |
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|
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/** |
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* Sampler engine for the Gigasampler format. |
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*/ |
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class Engine : public LinuxSampler::Engine { |
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public: |
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// methods |
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Engine(); |
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virtual ~Engine(); |
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void Connect(AudioOutputDevice* pAudioOut); |
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void SuspendAll(); |
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void ResumeAll(); |
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void Suspend(::gig::Region* pRegion); |
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void Resume(::gig::Region* pRegion); |
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|
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// implementation of abstract methods derived from class 'LinuxSampler::Engine' |
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virtual int RenderAudio(uint Samples); |
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virtual void SendSysex(void* pData, uint Size, MidiInputPort* pSender); |
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virtual void Reset(); |
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virtual void Enable(); |
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virtual void Disable(); |
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virtual uint VoiceCount(); |
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virtual uint VoiceCountMax(); |
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virtual int MaxVoices(); |
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virtual void SetMaxVoices(int iVoices) throw (Exception); |
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virtual bool DiskStreamSupported(); |
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virtual uint DiskStreamCount(); |
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virtual uint DiskStreamCountMax(); |
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virtual int MaxDiskStreams(); |
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virtual void SetMaxDiskStreams(int iStreams) throw (Exception); |
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virtual String DiskStreamBufferFillBytes(); |
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virtual String DiskStreamBufferFillPercentage(); |
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virtual String Description(); |
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virtual String Version(); |
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virtual String EngineName(); |
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virtual InstrumentManager* GetInstrumentManager(); |
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|
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void SetVoiceCount(uint Count); |
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|
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// Simple array wrapper just to make sure memory is freed |
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// when liblinuxsampler is unloaded |
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class FloatTable { |
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private: |
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const float* array; |
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public: |
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FloatTable(const float* array) : array(array) { } |
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~FloatTable() { delete[] array; } |
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const float& operator[](int i) const { return array[i]; } |
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}; |
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|
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static const FloatTable VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90. |
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static const FloatTable PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center). |
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static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127. |
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|
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//protected: |
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static InstrumentResourceManager instruments; |
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|
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AudioOutputDevice* pAudioOutputDevice; |
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uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz) |
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uint MaxSamplesPerCycle; ///< Size of each audio output buffer |
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DiskThread* pDiskThread; |
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RingBuffer<Event,false>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages). |
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Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated. |
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EventGenerator* pEventGenerator; |
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RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage. |
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RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages). |
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Pool<Event>* pEventPool; ///< Contains all Event objects that can be used. |
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RingBuffer<uint8_t,false>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages. |
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int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation) |
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int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
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int VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit. |
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RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise. |
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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. |
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EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment. |
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RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally |
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RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally |
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bool SuspensionRequested; |
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ConditionServer EngineDisabled; |
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int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave |
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int MinFadeOutSamples; ///< The number of samples needed to make an instant fade out (e.g. for voice stealing) without leading to clicks. |
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uint32_t RandomSeed; ///< State of the random number generator used by the random dimension. |
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Mutex ResetInternalMutex; ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads). |
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Pool< ::gig::DimensionRegion*>* pDimRegionPool[2]; ///< Double buffered pool, used by the engine channels to keep track of dimension regions in use. |
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|
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void ProcessEvents(EngineChannel* pEngineChannel, uint Samples); |
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void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples); |
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void RenderStolenVoices(uint Samples); |
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void RouteAudio(EngineChannel* pEngineChannel, uint Samples); |
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void PostProcess(EngineChannel* pEngineChannel); |
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void ClearEventLists(); |
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void ImportEvents(uint Samples); |
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void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent); |
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void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent); |
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void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent); |
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void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent); |
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void ProcessSysex(Pool<Event>::Iterator& itSysexEvent); |
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void ProcessSuspensionsChanges(); |
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void ProcessPendingStreamDeletions(); |
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Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts); |
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int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent); |
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void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice); |
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void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey); |
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void ResetInternal(); |
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void ResetScaleTuning(); |
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void ResetSuspendedRegions(); |
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static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice); |
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static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice); |
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|
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void DisableAndLock(); // FIXME: should at least be protected |
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|
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friend class Voice; |
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private: |
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Pool< ::gig::Region*> SuspendedRegions; |
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Mutex SuspendedRegionsMutex; |
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Condition SuspensionChangeOngoing; |
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::gig::Region* pPendingRegionSuspension; |
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::gig::Region* pPendingRegionResumption; |
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int iPendingStreamDeletions; |
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|
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ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance. |
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static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine. |
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int SostenutoKeys[128]; |
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int SostenutoKeyCount; |
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uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize); |
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void AdjustScale(int8_t ScaleTunes[12]); |
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void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent); |
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void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent); |
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bool ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key); |
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bool RegionSuspended(::gig::Region* pRegion); |
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static float* InitVolumeCurve(); |
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static float* InitPanCurve(); |
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static float* InitCrossfadeCurve(); |
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static float* InitCurve(const float* segments, int size = 128); |
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unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment |
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atomic_t ActiveVoiceCount; ///< number of currently active voices |
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int iMaxDiskStreams; |
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}; |
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}} // namespace LinuxSampler::gig |
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#endif // __LS_GIG_ENGINE_H__ |
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