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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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* * |
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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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|
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#include "../../common/global.h" |
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|
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#if DEBUG_HEADERS |
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# warning Engine.h included |
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#endif // DEBUG_HEADERS |
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|
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#include <map> |
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|
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#include "../../common/RingBuffer.h" |
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#include "../../common/Pool.h" |
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#include "../../common/ConditionServer.h" |
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#include "../common/Engine.h" |
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#include "../common/Event.h" |
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#include "../common/BiquadFilter.h" |
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#include "../../lib/fileloader/libgig/gig.h" |
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#include "InstrumentResourceManager.h" |
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#include "../../network/lscp.h" |
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|
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#define PITCHBEND_SEMITONES 12 |
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#define MAX_AUDIO_VOICES 128 |
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#define SYSEX_BUFFER_SIZE 2048 // 2kB |
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#define VOICE_STEAL_ALGORITHM voice_steal_algo_oldestkey ///< @see voice_steal_algo_t for available voice stealing algorithms |
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|
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namespace LinuxSampler { namespace gig { |
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|
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using std::map; |
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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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|
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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, public InstrumentConsumer { |
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public: |
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// types |
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enum voice_steal_algo_t { |
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voice_steal_algo_none, |
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voice_steal_algo_keymask, |
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voice_steal_algo_oldestkey |
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}; |
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|
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// methods |
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Engine(); |
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~Engine(); |
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|
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// abstract methods derived from class 'LinuxSampler::Engine' |
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virtual void PrepareLoadInstrument(const char* FileName, uint Instrument); |
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virtual void LoadInstrument(); |
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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 void SendNoteOn(uint8_t Key, uint8_t Velocity); |
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virtual void SendNoteOff(uint8_t Key, uint8_t Velocity); |
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virtual void SendPitchbend(int Pitch); |
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virtual void SendControlChange(uint8_t Controller, uint8_t Value); |
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virtual void SendSysex(void* pData, uint Size); |
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virtual float Volume(); |
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virtual void Volume(float f); |
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virtual uint Channels(); |
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virtual void Connect(AudioOutputDevice* pAudioOut); |
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virtual void DisconnectAudioOutputDevice(); |
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virtual void SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel); |
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virtual int OutputChannel(uint EngineAudioChannel); |
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virtual int RenderAudio(uint Samples); |
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virtual uint VoiceCount(); |
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virtual uint VoiceCountMax(); |
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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 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 String InstrumentFileName(); |
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virtual String InstrumentName(); |
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virtual int InstrumentIndex(); |
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virtual int InstrumentStatus(); |
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|
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// abstract methods derived from interface class 'InstrumentConsumer' |
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virtual void ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg); |
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virtual void ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg); |
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//protected: |
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struct midi_key_info_t { |
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RTList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key. |
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bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed. |
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bool Active; ///< If the key contains active voices. |
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bool ReleaseTrigger; ///< If we have to launch release triggered voice(s) when the key is released |
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Pool<uint>::Iterator itSelf; ///< hack to allow fast deallocation of the key from the list of active keys |
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RTList<Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently) |
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}; |
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|
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static InstrumentResourceManager Instruments; |
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|
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AudioOutputDevice* pAudioOutputDevice; |
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float* pOutputLeft; ///< Audio output channel buffer (left) |
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float* pOutputRight; ///< Audio output channel buffer (right) |
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int AudioDeviceChannelLeft; ///< audio device channel number to which the left channel is connected to |
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int AudioDeviceChannelRight; ///< audio device channel number to which the right channel is connected to |
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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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uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel. |
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RingBuffer<Event>* pEventQueue; ///< Input event queue. |
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RingBuffer<uint8_t>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages. |
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midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key |
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Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated. |
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Pool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices. |
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Pool<Event>* pEventPool; ///< Contains all Event objects that can be used. |
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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>* pEvents; ///< All events for the current audio fragment. |
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RTList<Event>* pCCEvents; ///< All control change events for the current audio fragment. |
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RTList<Event>* pSynthesisEvents[Event::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter). |
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float* pSynthesisParameters[Event::destination_count]; ///< Matrix with final synthesis parameters for the current audio fragment which will be used in the main synthesis loop. |
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biquad_param_t* pBasicFilterParameters; ///< Biquad parameters of the basic bandpass filter. |
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biquad_param_t* pMainFilterParameters; ///< Main biquad parameters of the individual filter (lowpass / bandpass / highpass). |
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map<uint,uint*> ActiveKeyGroups; ///< Contains active keys (in case they belong to a key group) ordered by key group ID. |
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RIFF::File* pRIFF; |
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::gig::File* pGig; |
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::gig::Instrument* pInstrument; |
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bool SustainPedal; ///< true if sustain pedal is down |
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double GlobalVolume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification) |
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int Pitch; ///< Current (absolute) MIDI pitch value. |
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int CurrentKeyDimension; ///< Current value (0-127) for the keyboard dimension, altered by pressing a keyswitching key. |
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int ActiveVoiceCount; ///< number of currently active voices |
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int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
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bool SuspensionRequested; |
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ConditionServer EngineDisabled; |
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String InstrumentFile; |
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int InstrumentIdx; |
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String InstrumentIdxName; |
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int InstrumentStat; |
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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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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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int MaxFadeOutPos; ///< The last position in an audio fragment to allow a instant fade out (e.g. for voice stealing) without leading to clicks. |
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|
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void ProcessNoteOn(Pool<Event>::Iterator& itNoteOnEvent); |
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void ProcessNoteOff(Pool<Event>::Iterator& itNoteOffEvent); |
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void ProcessPitchbend(Pool<Event>::Iterator& itPitchbendEvent); |
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void ProcessControlChange(Pool<Event>::Iterator& itControlChangeEvent); |
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void ProcessSysex(Pool<Event>::Iterator& itSysexEvent); |
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Pool<Voice>::Iterator LaunchVoice(Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing); |
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void StealVoice(Pool<Event>::Iterator& itNoteOnEvent); |
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void FreeVoice(Pool<Voice>::Iterator& itVoice); |
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void FreeKey(midi_key_info_t* pKey); |
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void ResetSynthesisParameters(Event::destination_t dst, float val); |
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void ResetInternal(); |
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friend class Voice; |
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friend class EGADSR; |
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friend class EGDecay; |
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friend class VCAManipulator; |
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friend class VCFCManipulator; |
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friend class VCOManipulator; |
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friend class InstrumentResourceManager; |
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private: |
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void DisableAndLock(); |
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uint8_t GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize); |
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void AdjustScale(int8_t ScaleTunes[12]); |
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}; |
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}} // namespace LinuxSampler::gig |
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|
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#endif // __LS_GIG_ENGINE_H__ |
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