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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) 2005-2008 Christian Schoenebeck * |
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* Copyright (C) 2009-2011 Christian Schoenebeck and Grigor Iliev * |
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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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|
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#ifndef __LS_ABSTRACTVOICE_H__ |
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#define __LS_ABSTRACTVOICE_H__ |
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|
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#include "Voice.h" |
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|
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#include "../../common/global_private.h" |
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#include "../AbstractEngineChannel.h" |
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#include "../common/LFOBase.h" |
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#include "../EngineBase.h" |
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#include "EG.h" |
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#include "../gig/EGADSR.h" |
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#include "../gig/EGDecay.h" |
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#include "../gig/SmoothVolume.h" |
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#include "../gig/Synthesizer.h" |
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#include "../gig/Profiler.h" |
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#include "SignalUnitRack.h" |
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|
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// include the appropriate (unsigned) triangle LFO implementation |
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#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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# include "../common/LFOTriangleIntMath.h" |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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# include "../common/LFOTriangleIntAbsMath.h" |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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# include "../common/LFOTriangleDiHarmonic.h" |
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#else |
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# error "Unknown or no (unsigned) triangle LFO implementation selected!" |
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#endif |
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|
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// include the appropriate (signed) triangle LFO implementation |
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#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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# include "../common/LFOTriangleIntMath.h" |
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#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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# include "../common/LFOTriangleIntAbsMath.h" |
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#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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# include "../common/LFOTriangleDiHarmonic.h" |
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#else |
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# error "Unknown or no (signed) triangle LFO implementation selected!" |
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#endif |
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|
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namespace LinuxSampler { |
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|
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#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned; |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned; |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned; |
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#endif |
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|
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#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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typedef LFOTriangleIntMath<range_signed> LFOSigned; |
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#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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typedef LFOTriangleIntAbsMath<range_signed> LFOSigned; |
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#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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typedef LFOTriangleDiHarmonic<range_signed> LFOSigned; |
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#endif |
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|
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class AbstractVoice : public Voice { |
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public: |
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type_t Type; ///< Voice Type (bit field, a voice may have several types) |
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int MIDIKey; ///< MIDI key number of the key that triggered the voice |
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uint8_t MIDIVelocity; ///< MIDI velocity of the key that triggered the voice |
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uint8_t MIDIPan; ///< the current MIDI pan value |
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|
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SignalUnitRack* const pSignalUnitRack; |
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|
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AbstractVoice(SignalUnitRack* pRack); |
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virtual ~AbstractVoice(); |
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|
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inline bool IsActive() { return PlaybackState; } |
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inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; } |
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|
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virtual void Reset(); |
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|
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virtual int Trigger ( |
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AbstractEngineChannel* pEngineChannel, |
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Pool<Event>::Iterator& itNoteOnEvent, |
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int PitchBend, |
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type_t VoiceType, |
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int iKeyGroup |
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); |
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|
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/** Invoked when the voice is freed - gone from active to inactive. */ |
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virtual void VoiceFreed() { } |
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|
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virtual void Synthesize(uint Samples, sample_t* pSrc, uint Skip); |
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|
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uint GetSampleRate() { return GetEngine()->SampleRate; } |
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|
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uint8_t GetControllerValue(uint8_t Controller) { |
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return (Controller > 128) ? 0 : pEngineChannel->ControllerTable[Controller]; |
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} |
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|
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void processCCEvents(RTList<Event>::Iterator& itEvent, uint End); |
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void processPitchEvent(RTList<Event>::Iterator& itEvent); |
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void processResonanceEvent(RTList<Event>::Iterator& itEvent); |
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void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End); |
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void processGroupEvents(RTList<Event>::Iterator& itEvent, uint End); |
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void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent); |
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void Kill(Pool<Event>::Iterator& itKillEvent); |
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|
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bool Orphan; ///< true if this voice is playing a sample from an instrument that is unloaded. When the voice dies, the sample (and dimension region) will be handed back to the instrument resource manager. |
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playback_state_t PlaybackState; ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly |
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Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream |
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|
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template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase; |
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|
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protected: |
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SampleInfo SmplInfo; |
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RegionInfo RgnInfo; |
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InstrumentInfo InstrInfo; |
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AbstractEngineChannel* pEngineChannel; |
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|
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double Pos; ///< Current playback position in sample |
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PitchInfo Pitch; |
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float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied |
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float VolumeLeft; ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that. |
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float VolumeRight; ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that. |
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gig::SmoothVolume CrossfadeSmoother; ///< Crossfade volume, updated by crossfade CC events |
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gig::SmoothVolume VolumeSmoother; ///< Volume, updated by CC 7 (volume) events |
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gig::SmoothVolume PanLeftSmoother; ///< Left channel volume, updated by CC 10 (pan) events |
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gig::SmoothVolume PanRightSmoother; ///< Right channel volume, updated by CC 10 (pan) events |
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bool DiskVoice; ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false |
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bool RAMLoop; ///< If this voice has a loop defined which completely fits into the cached RAM part of the sample, in this case we handle the looping within the voice class, else if the loop is located in the disk stream part, we let the disk stream handle the looping |
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unsigned long MaxRAMPos; ///< The upper allowed limit (not actually the end) in the RAM sample cache, after that point it's not safe to chase the interpolator another time over over the current cache position, instead we switch to disk then. |
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uint Delay; ///< Number of sample points the rendering process of this voice should be delayed (jitter correction), will be set to 0 after the first audio fragment cycle |
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EG* pEG1; ///< Envelope Generator 1 (Amplification) |
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EG* pEG2; ///< Envelope Generator 2 (Filter cutoff frequency) |
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gig::EGDecay EG3; ///< Envelope Generator 3 (Pitch) TODO: use common EG instead? |
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midi_ctrl VCFCutoffCtrl; |
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midi_ctrl VCFResonanceCtrl; |
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LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification) |
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LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency) |
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LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch) |
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bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice? |
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bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice? |
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bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice? |
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Pool<Event>::Iterator itTriggerEvent; ///< First event on the key's list the voice should process (only needed for the first audio fragment in which voice was triggered, after that it will be set to NULL). |
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Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed |
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int SynthesisMode; |
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float fFinalCutoff; |
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float fFinalResonance; |
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gig::SynthesisParam finalSynthesisParameters; |
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gig::Loop loop; |
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RTList<Event>* pGroupEvents; ///< Events directed to an exclusive group |
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|
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virtual AbstractEngine* GetEngine() = 0; |
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virtual SampleInfo GetSampleInfo() = 0; |
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virtual RegionInfo GetRegionInfo() = 0; |
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virtual InstrumentInfo GetInstrumentInfo() = 0; |
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|
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/** |
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* Most of the important members of the voice are set when the voice |
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* is triggered (like pEngineChannel, pRegion, pSample, etc). |
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* This method is called after these members are set and before |
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* the voice is actually triggered. |
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* Override this method if you need to do some additional |
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* initialization which depends on these members before the voice |
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* is triggered. |
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*/ |
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virtual void AboutToTrigger() { } |
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|
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virtual bool EG1Finished(); |
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|
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/** |
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* Gets the sample cache size in bytes. |
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*/ |
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virtual unsigned long GetSampleCacheSize() = 0; |
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|
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/** |
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* Because in most cases we cache part of the sample in RAM, if the |
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* offset is too big (will extend beyond the RAM cache if the cache contains |
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* the beginning of the sample) we should cache in the RAM buffer not the |
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* beginning of the sample but a part that starts from the sample offset point. |
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* In that case the current sample position should start from zero (Pos). |
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* When the offset fits into RAM buffer or the whole sample is cached |
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* in RAM, Pos should contain the actual offset. |
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* We don't trim the sample because it might have a defined |
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* loop start point before the start point of the playback. |
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*/ |
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virtual void SetSampleStartOffset(); |
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|
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/** |
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* Returns the correct amplitude factor for the given \a MIDIKeyVelocity. |
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* All involved parameters (VelocityResponseCurve, VelocityResponseDepth |
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* and VelocityResponseCurveScaling) involved are taken into account to |
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* calculate the amplitude factor. Use this method when a key was |
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* triggered to get the volume with which the sample should be played |
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* back. |
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* |
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* @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127) |
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* @returns amplitude factor (between 0.0 and 1.0) |
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*/ |
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virtual double GetVelocityAttenuation(uint8_t MIDIKeyVelocity) = 0; |
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|
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virtual double GetSampleAttenuation() = 0; |
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|
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virtual double CalculateVolume(double velocityAttenuation); |
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|
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virtual float GetReleaseTriggerAttenuation(float noteLength); |
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|
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/** |
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* Get starting crossfade volume level |
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*/ |
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virtual double CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) = 0; |
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|
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virtual MidiKeyBase* GetMidiKeyInfo(int MIDIKey) = 0; |
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|
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virtual int OrderNewStream() = 0; |
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|
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virtual PitchInfo CalculatePitchInfo(int PitchBend); |
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|
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// TODO: cleanup the interface. The following two methods |
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// are maybe not neccessary after the TriggerEG1 method |
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// was added. |
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|
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/** |
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* Get current value of EG1 controller. |
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*/ |
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virtual double GetEG1ControllerValue(uint8_t MIDIKeyVelocity) = 0; |
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|
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/** |
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* Calculate influence of EG1 controller on EG1's parameters. |
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*/ |
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virtual EGInfo CalculateEG1ControllerInfluence(double eg1ControllerValue) = 0; |
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|
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// TODO: cleanup the interface. The velrelase and |
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// velocityAttenuation parameters are perhaps too gig |
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// specific. |
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/** |
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* Trigger the amplitude envelope generator. |
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*/ |
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virtual void TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0; |
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|
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/** |
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* Get current value of EG2 controller. |
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*/ |
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virtual double GetEG2ControllerValue(uint8_t MIDIKeyVelocity) = 0; |
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|
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/** |
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* Calculate influence of EG2 controller on EG2's parameters. |
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*/ |
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virtual EGInfo CalculateEG2ControllerInfluence(double eg2ControllerValue) = 0; |
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|
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virtual void TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) = 0; |
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|
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virtual float CalculateCutoffBase(uint8_t MIDIKeyVelocity) = 0; |
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virtual float CalculateFinalCutoff(float cutoffBase) = 0; |
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|
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virtual void InitLFO1() = 0; |
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virtual void InitLFO2() = 0; |
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virtual void InitLFO3() = 0; |
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|
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virtual uint8_t GetVCFCutoffCtrl() = 0; |
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virtual uint8_t GetVCFResonanceCtrl() = 0; |
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virtual uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) = 0; |
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|
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virtual void GetFirstEventOnKey(uint8_t MIDIKey, RTList<Event>::Iterator& itEvent) = 0; |
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virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent) = 0; |
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virtual void ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) = 0; |
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virtual double GetVelocityRelease(uint8_t MIDIKeyVelocity) = 0; |
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|
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virtual unsigned long GetNoteOnTime(int MIDIKey) = 0; |
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|
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virtual void ProcessGroupEvent(RTList<Event>::Iterator& itEvent) = 0; |
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void EnterReleaseStage(); |
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}; |
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} // namespace LinuxSampler |
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|
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#endif /* __LS_ABSTRACTVOICE_H__ */ |
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